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* [Bug c++/70755] [ARM] excessive struct alignment for globals
[not found] <bug-70755-4@http.gcc.gnu.org/bugzilla/>
@ 2016-04-22 13:22 ` rearnsha at gcc dot gnu.org
0 siblings, 0 replies; only message in thread
From: rearnsha at gcc dot gnu.org @ 2016-04-22 13:22 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70755
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |arm
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
This is a deliberate design choice. By doing this we gain significant benefits
from having aligned objects, which helps with data copying and other
optimizations.
Consider, for example, the object
struct x
{
char a;
char b;
char c;
char d;
};
struct x A, B;
f()
{
B = A;
}
Since the objects are aligned then this function can be optimized to single
32-bit load and store operations that work very efficiently.
As you've noticed, it is possible to force the alignment down to the
architectural minimums by annotations, but for most users it makes little
difference and the defaults are preferable.
>From gcc-bugs-return-522987-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 14:11:45 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70739] VALUE attribute interpretation in a non-interoperable procedure
Date: Fri, 22 Apr 2016 14:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70739
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2016-04-22
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Steve Lionel's comment to discuss here:
> - [...]For a non-interoperable procedure, one without BIND(C), VALUE causes
> a writable, temporary copy of the argument to be passed by reference.
> So in zmi's case, the call through the procedure pointer, defined with
> an interface that did not have BIND(C), caused the address of a copy
> of "length" to be passed.
This interpretation looks very weird. I had a quick look to the standard, but
did not find anything to support it. Would it be possible to have an exact
pointer to where it is stated?
>From gcc-bugs-return-522988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 14:15:53 2016
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/62236] <built-in>: error: aggregate value used where an integer was expected
Date: Fri, 22 Apr 2016 14:15:00 -0000
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simon at pushface dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |simon at pushface dot org
--- Comment #6 from simon at pushface dot org ---
Not fixed in gcc-6.0.1-RC-20160415
>From gcc-bugs-return-522989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 14:30:43 2016
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70763] New: Use SSE for DImode load/store
Date: Fri, 22 Apr 2016 14:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70763
Bug ID: 70763
Summary: Use SSE for DImode load/store
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: ienkovich at gcc dot gnu.org
Target Milestone: ---
Target: i386
On i386, we should use SSE for DImode load/store:
[hjl@gnu-6 pr70155d]$ cat x1.i
extern long long a, b;
void
foo (void)
{
a = b;
}
[hjl@gnu-6 pr70155d]$ cat x2.i
struct foo
{
long long i;
}__attribute__ ((packed));
extern struct foo x, y;
void
foo (void)
{
x = y;
}
[hjl@gnu-6 pr70155d]$ cat x5.i
extern long long a;
void
foo (void)
{
a = 0;
}
[hjl@gnu-6 pr70155d]$ cat x6.i
extern long long a;
void
foo (void)
{
a = -1;
}
[hjl@gnu-6 pr70155d]$ make x1.s x2.s x5.s x6.s
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -msse2 -m32
-fno-asynchronous-unwind-tables -S -o x1.s x1.i
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -msse2 -m32
-fno-asynchronous-unwind-tables -S -o x2.s x2.i
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -msse2 -m32
-fno-asynchronous-unwind-tables -S -o x5.s x5.i
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -msse2 -m32
-fno-asynchronous-unwind-tables -S -o x6.s x6.i
[hjl@gnu-6 pr70155d]$ cat x1.s x2.s x5.s x6.s
.file "x1.i"
.text
.p2align 4,,15
.globl foo
.type foo, @function
foo:
movl b, %eax
movl b+4, %edx
movl %eax, a
movl %edx, a+4
ret
.size foo, .-foo
.ident "GCC: (GNU) 7.0.0 20160422 (experimental)"
.section .note.GNU-stack,"",@progbits
.file "x2.i"
.text
.p2align 4,,15
.globl foo
.type foo, @function
foo:
movl y, %eax
movl y+4, %edx
movl %eax, x
movl %edx, x+4
ret
.size foo, .-foo
.ident "GCC: (GNU) 7.0.0 20160422 (experimental)"
.section .note.GNU-stack,"",@progbits
.file "x5.i"
.text
.p2align 4,,15
.globl foo
.type foo, @function
foo:
movl $0, a
movl $0, a+4
ret
.size foo, .-foo
.ident "GCC: (GNU) 7.0.0 20160422 (experimental)"
.section .note.GNU-stack,"",@progbits
.file "x6.i"
.text
.p2align 4,,15
.globl foo
.type foo, @function
foo:
movl $-1, a
movl $-1, a+4
ret
.size foo, .-foo
.ident "GCC: (GNU) 7.0.0 20160422 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-6 pr70155d]$
They all can use SSE loa/store.
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Subject: [Bug target/70098] PowerPC64: eigen hits ICE following invalid register assignment
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |markos at freevec dot org
--- Comment #9 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
*** Bug 70761 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-522992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 14:33:35 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70762] FAIL: experimental/filesystem/operations/copy.cc execution test on x86_64-apple-darwin1*
Date: Fri, 22 Apr 2016 14:33:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-22
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The test also fails on armv6-unknown-freebsd11.0, see
https://gcc.gnu.org/ml/gcc-testresults/2016-04/msg02071.html.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70761] C++ ICE on ppc64le and ppc64 with -m64
Date: Fri, 22 Apr 2016 14:33:00 -0000
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
This was fixed in GCC 6 but not yet backported. See
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70098. I'll get a backport of
Segher's patch in the works soon.
*** This bug has been marked as a duplicate of bug 70098 ***
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70762] FAIL: experimental/filesystem/operations/copy.cc execution test on x86_64-apple-darwin1*
Date: Fri, 22 Apr 2016 14:35:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Also on i386-unknown-freebsd10.3, see
https://gcc.gnu.org/ml/gcc-testresults/2016-04/msg02065.html.
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Subject: [Bug libstdc++/70762] FAIL: experimental/filesystem/operations/copy.cc execution test on x86_64-apple-darwin1*
Date: Fri, 22 Apr 2016 14:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70762
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ah cool, I should be able to reproduce that, thanks.
>From gcc-bugs-return-522995-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 14:46:38 2016
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Subject: [Bug debug/70764] New: PASS->FAIL: gcc.dg/guality/pr41447-1.c -O2 -flto -fno-use-linker-plugin -flto-partition=none
Date: Fri, 22 Apr 2016 14:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70764
Bug ID: 70764
Summary: PASS->FAIL: gcc.dg/guality/pr41447-1.c -O2 -flto
-fno-use-linker-plugin -flto-partition=none
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: ktkachov at gcc dot gnu.org
Target Milestone: ---
Target: aarch64-none-linux-gnu
After:
Author: nickc <nickc@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu Mar 10 17:24:16 2016 +0000
PR target/7044
* config/aarch64/aarch64.c
(aarch64_override_options_after_change_1): When forcing
flag_omit_frame_pointer to be true, use a special value that can
be detected if this function is called again, thus preventing
flag_omit_leaf_frame_pointer from being forced to be false.
* gcc.target/aarch64/pr70044.c: New test.
The test:
gcc.dg/guality/pr41447-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none
started to fail on aarch64-linux.
Note that this test was already failing for other optimisation levels before
that change:
FAIL: gcc.dg/guality/pr41447-1.c -O2 execution test
FAIL: gcc.dg/guality/pr41447-1.c -O3 -g execution test
FAIL: gcc.dg/guality/pr41447-1.c -Os execution test
That patch controlled the way -fomit-frame-pointer is turned on, which probably
affected debug info generation, so it is very likely that the patch just
triggered the same issue that caused the failure on the other optimisation
levels in this test.
Nick, do you have any experience with the guality tests to comment?
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Subject: [Bug libstdc++/70762] FAIL: experimental/filesystem/operations/copy.cc execution test on x86_64-apple-darwin1*
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Created attachment 38327
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Note that the problems are located in the procedures test02 and test03.
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Subject: [Bug c++/66543] False positive warning "variable set but not used"
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
Target Milestone|--- |6.0
--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for GCC 6.
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Subject: [Bug libstdc++/70762] FAIL: experimental/filesystem/operations/copy.cc execution test on x86_64-apple-darwin1*
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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Attachment #38327|0 |1
is obsolete| |
--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Created attachment 38328
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This time with the original test. Compile it with something such as
g++ -L/opt/gcc/build_w/x86_64-apple-darwin15.4.0/libstdc++-v3/src/.libs
-L/opt/gcc/build_w/x86_64-apple-darwin15.4.0/libstdc++-v3/libsupc++/.libs
-D_GLIBCXX_ASSERT -DLOCALEDIR="." -nostdinc++ -std=gnu++11 -lstdc++fs
/opt/gcc/build_w/x86_64-apple-darwin15.4.0/libstdc++-v3/testsuite/normal1/libtestc++.a
copy.ii
where
/opt/gcc/build_w/x86_64-apple-darwin15.4.0/libstdc++-v3/testsuite/normal1/libtestc++.a
has been produced during the libstdc++ tests.
>From gcc-bugs-return-522999-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 15:35:18 2016
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Subject: [Bug target/70738] Add -minteger-only option
Date: Fri, 22 Apr 2016 15:35:00 -0000
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--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
AArch64 already has a similar option already. We've called it
-mgeneral-regs-only.
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Subject: [Bug c++/70522] Hidden friend functions block qualified name lookup into nested unnamed namespace
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 22 15:38:57 2016
New Revision: 235368
URL: https://gcc.gnu.org/viewcvs?rev=235368&root=gcc&view=rev
Log:
PR c++/70522 - fix N4381 customization points
* name-lookup.c (qualified_lookup_using_namespace): Look through
hidden names.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/lookup/friend18.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/name-lookup.c
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Subject: [Bug c++/68206] ICE: unimplemented: unexpected AST of kind loop_expr in potential_constant_expression_1
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 22 15:39:03 2016
New Revision: 235369
URL: https://gcc.gnu.org/viewcvs?rev=235369&root=gcc&view=rev
Log:
PR c++/68206 - Fix constexpr diagnostics with loops.
PR c++/68530
* constexpr.c (potential_constant_expression_1): Handle LOOP_EXPR
and GOTO_EXPR.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/constexpr-loop5.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/constexpr.c
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Subject: [Bug c++/70522] Hidden friend functions block qualified name lookup into nested unnamed namespace
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |6.0
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Casey Carter from comment #2)
> This is a regression of sorts, FWIW, gcc 4.3 compiled it correctly
> (http://melpon.org/wandbox/permlink/Efjfvay0U5sZvZP8) back in the day. I
> assume that's not quite "regressive" enough for the 6 branch?
I was thinking of putting it in anyway, but that definitely strengthens the
case. :)
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Subject: [Bug debug/70764] PASS->FAIL: gcc.dg/guality/pr41447-1.c -O2 -flto -fno-use-linker-plugin -flto-partition=none
Date: Fri, 22 Apr 2016 15:40:00 -0000
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Nick Clifton <nickc at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Nick Clifton <nickc at gcc dot gnu.org> ---
Hi Kyrylo,
> Nick, do you have any experience with the guality tests to comment?
Sorry no. I do not have an aarch64 executable environment, only a simulator,
so I am not able to run these tests.
I think that you are right however in that the patch has probably exposed an
underlying problem, especially since the test was already failing at other
optimization levels.
How does the test fail ? Ie what, specifically is wrong. I suspect that it
will be something along the lines of GDB being unable to find the named
variable, possibly because it is being held in a register and not on the stack.
Or maybe the debug information is corrupt and GDB is looking in the wrong
place
for the value of the variable.
Cheers
Nick
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Subject: [Bug c++/68530] [C++14] sorry, unimplemented: unexpected AST of kind loop_expr
Date: Fri, 22 Apr 2016 15:40:00 -0000
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Apr 22 15:39:03 2016
New Revision: 235369
URL: https://gcc.gnu.org/viewcvs?rev=235369&root=gcc&view=rev
Log:
PR c++/68206 - Fix constexpr diagnostics with loops.
PR c++/68530
* constexpr.c (potential_constant_expression_1): Handle LOOP_EXPR
and GOTO_EXPR.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/constexpr-loop5.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/constexpr.c
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Subject: [Bug c++/68206] ICE: unimplemented: unexpected AST of kind loop_expr in potential_constant_expression_1
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/55004] [meta-bug] constexpr issues
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Bug 55004 depends on bug 68206, which changed state.
Bug 68206 Summary: ICE: unimplemented: unexpected AST of kind loop_expr in potential_constant_expression_1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68206
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>From gcc-bugs-return-523007-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 15:43:59 2016
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Subject: [Bug debug/70764] PASS->FAIL: gcc.dg/guality/pr41447-1.c -O2 -flto -fno-use-linker-plugin -flto-partition=none
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
I think so. gcc.log contains:
PASS: a is 0
FAIL: tmp is -1, not 0
FAIL: tmp2 is -1, not 0
PASS: a is 0
FAIL: tmp is -1, not 0
FAIL: tmp2 is -1, not 0
FAIL: tmp3 is -1, not 0
FAIL: 2 PASS, 5 FAIL, 0 UNRESOLVED
FAIL: gcc.dg/guality/pr41447-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none execution test
There are optimisation levels where the test passes though.
For example:
PASS: gcc.dg/guality/pr41447-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects.
Perhaps we should XFAIL the test for aarch64?
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Subject: [Bug testsuite/70719] the libjava testsuite does not work with dejagnu 1.6
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Would it be possible to back port the fix to the other open branches?
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/65083] Can not indirectly call some C11 atomic library functions
Date: Fri, 22 Apr 2016 16:19:00 -0000
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--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
It's basically a matter of whether you consider adding a new symbol
version to be appropriate in a backport.
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Subject: [Bug preprocessor/16358] -Wno-system-headers hides warning caused by user header vs system header conflict
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #10 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to niva from comment #9)
-Werror turns the warning GCC issues for a macro redefinition into an error. A
part of the problem is that warnings in system headers are suppressed by
default, without -Wsystem-headers, so -Werror alone doesn't help.
What is also missing, though, is a mechanism/option to silence the macro
redefinition warning without also suppressing all other warnings (i.e., an
option other that -w).
For example, there is no way to suppress the warning in the example below
without also suppressing the -Wcpp warning. In contrast to GCC, Clang provides
the -Wmacro-redefined option that makes it possible to control just the macro
redefinition warning.
Providing the same feature in GCC might help resolve this problem by enabling
warnings for macro redefinitions in user headers without also enabling all
other warnings in them.
$ cat t.c && gcc -S t.c
#define A 1
#define A 2
#warning foo
t.c:2:0: warning: "A" redefined
#define A 2
t.c:1:0: note: this is the location of the previous definition
#define A 1
t.c:3:2: warning: #warning foo [-Wcpp]
#warning foo
^~~~~~~
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Subject: [Bug c/70765] New: GCC fails to detect possibly uninitialized variable
Date: Fri, 22 Apr 2016 18:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70765
Bug ID: 70765
Summary: GCC fails to detect possibly uninitialized variable
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: mike at conlen dot org
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Created attachment 38329
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38329&action=edit
main() .i file
GCC without an optimization option does not catch a situation where a variable
is used uninitialized (with -Wall -Werror). I can cause gcc to catch this
situation by making the function call which involves passing the unused
variable a call to a function in another translation unit.
Compiler:
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/mconlen/libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-5.3.0/configure --prefix=/home/mconlen
--enable-languages=all
Thread model: posix
gcc version 5.3.0 (GCC)
$
System Type:
$ uname -a
Linux bos-lprll 3.13.0-83-generic #127-Ubuntu SMP Fri Mar 11 00:25:37 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux
$
Building commands:
$ gcc -Wall -Wextra -Werror -save-temps -c test.c
$ gcc -Wall -Wextra -Werror -save-temps -c af.c
$ gcc -Wall -Werror -o test test.o af.o
Compiler output: None
.i files: attached
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Subject: [Bug c/70765] GCC fails to detect possibly uninitialized variable
Date: Fri, 22 Apr 2016 18:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70765
--- Comment #1 from Mike Conlen <mike at conlen dot org> ---
Created attachment 38330
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38330&action=edit
a second translation unit
Using the second translation unit will cause the compilation to error (as
expected) with -O3
>From gcc-bugs-return-523013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 18:08:17 2016
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From: "mike at conlen dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70765] GCC fails to detect possibly uninitialized variable
Date: Fri, 22 Apr 2016 18:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70765
--- Comment #2 from Mike Conlen <mike at conlen dot org> ---
If I compile with -O3 the compiler produces (as expected)
$ gcc -Wall -Wextra -Werror -save-temps -O3 -c test.c
test.c: In function 'try_to_fail':
test.c:25:2: error: 'data' is used uninitialized in this function
[-Werror=uninitialized]
arbitrary_function(data);
^
test.c: In function 'main':
test.c:25:2: error: 'data' is used uninitialized in this function
[-Werror=uninitialized]
test.c:18:7: note: 'data' was declared here
int *data;
^
cc1: all warnings being treated as errors
>From gcc-bugs-return-523014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 19:06:25 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Fri, 22 Apr 2016 19:06:00 -0000
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--- Comment #37 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Marek tried to reproduce this using the RC1 tarball, but it seems it went
through
comparison just fine; configure line has been:
/home/xxxxxxx/gcc-6.0.1-RC-20160415/configure --prefix=/home/xxxxxxx/rc
--enable-checking=release --with-gmp=/opt/cfarm/gmp-latest/
--with-mpc=/opt/cfarm/mpc-latest/ --with-mpfr=/opt/cfarm/mpfr-latest/
In the failed build tree, can you please do:
cd gcc
for i in gt-* gtype*.[ch]; do diff ../stage1-gcc/$i $i; done
cd ../prev-gcc
for i in gt-* gtype*.[ch]; do diff ../stage1-gcc/$i $i; done
(or change cd gcc and cd ../prev-gcc to cd stage3-gcc and cd ../stage2-gcc if
upon the failure the dirs stay named stage{1,2,3}-gcc instead of
{stage1-,prev-,}gcc
?
>From gcc-bugs-return-523015-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 20:34:06 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #38 from David Edelsohn <dje at gcc dot gnu.org> ---
The gt* files don't differ.
I normally use
--disable-werror --enable-languages=c,c++,fortran,objc --with-gmp=/opt/cfarm
--with-libiconv-prefix=/opt/cfarm --disable-libstdcxx-pch
--with-included-gettext --enable-checking=release
>From gcc-bugs-return-523016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 21:12:36 2016
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70733] Wrong code with nested structs and bit field.
Date: Fri, 22 Apr 2016 21:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70733
--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
This bug report is for C++, where bit-field width is explicitly not part
of the type and bit-field types wider than int are not extensions, not for
C, where there is a line of C90 DRs treating the width as part of the type
and things that are not defined at all if it is not part of the type.
The C++ front end should already convert bit-fields to their declared
types when needed (convert_bitfield_to_declared_type). So I don't agree
with the stated rationale for closure.
>From gcc-bugs-return-523017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 21:30:13 2016
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70742] Support div as a builtin
Date: Fri, 22 Apr 2016 21:30:00 -0000
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--- Comment #12 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
A script that assumes build = host = target is obviously unacceptable.
You can't do any compilations for $target at all when configuring GCC,
only when configuring its runtime libraries such as libgcc, because there
may not be a pre-existing compiler for $target at all. You can grep
target headers if they are available at configure time, but that's all,
and they may not be available.
I think you'd need to defer associating a declaration with a built-in
function until after the declaration of div in a system header has been
seen, at which point you have the header's declaration of div_t available
(ISO C doesn't allow calling div without including the header that
declares it). This delayed declaration does of course make it different
from all existing built-in functions.
>From gcc-bugs-return-523018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 21:33:09 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/65705] ICE: SIGSEGV in contains_struct_check with -fsanitize=null -fcheck-pointer-bounds
Date: Fri, 22 Apr 2016 21:33:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-22
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |6.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with 6.0:
$ cat v.c && gcc -S -fsanitize=null -fcheck-pointer-bounds -mmpx -xc v.c
int
foo (int *p)
{
return *p;
}
v.c:5:1: internal compiler error: Segmentation fault
}
^
0xe3bfe8 crash_signal
/home/msebor/scm/fsf/gcc-69517/gcc/toplev.c:335
0x752dea contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
/home/msebor/scm/fsf/gcc-69517/gcc/tree.h:3119
0xf296f9 chkp_walk_pointer_assignments
/home/msebor/scm/fsf/gcc-69517/gcc/tree-chkp.c:3725
0xf29f9d chkp_finish_file()
/home/msebor/scm/fsf/gcc-69517/gcc/tree-chkp.c:3835
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.
>From gcc-bugs-return-523019-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 22:01:29 2016
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Subject: [Bug c++/70522] Hidden friend functions block qualified name lookup into nested unnamed namespace
Date: Fri, 22 Apr 2016 22:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70522
--- Comment #5 from Casey Carter <Casey at Carter dot net> ---
(In reply to Jason Merrill from comment #4)
> (In reply to Casey Carter from comment #2)
> > This is a regression of sorts, FWIW, gcc 4.3 compiled it correctly
> > (http://melpon.org/wandbox/permlink/Efjfvay0U5sZvZP8) back in the day. I
> > assume that's not quite "regressive" enough for the 6 branch?
>
> I was thinking of putting it in anyway, but that definitely strengthens the
> case. :)
Clearly GCC6 MUST NOT SHIP until this critical bug - which has gone unnoticed
for years - is fixed. I would suggest elevating to P0 if it wasn't already
resolved ;)
>From gcc-bugs-return-523020-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 22:14:25 2016
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From: "ramana at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/69143] PowerPC64: aggregate results are badly handled
Date: Fri, 22 Apr 2016 22:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69143
Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc64le-linux |powerpc64le-linux,
| |aarch64-none-linux-gnu
CC| |ramana at gcc dot gnu.org
--- Comment #2 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
I'm not sure if this is target specific or not but on aarch64 and on armhf as
well the code is badly optimized
fmov x1, d1
fmov x0, d0
bfi x0, x1, 32, 32
ubfx x1, x0, 0, 32
ubfx x0, x0, 32, 32
fmov s1, w0
fmov s0, w1
ret
On ARM it's even more fun
sub sp, sp, #24
add r3, sp, #8
vstr.32 s0, [sp, #8]
vstr.32 s1, [sp, #12]
ldm r3, {r0, r1}
add r3, sp, #24
stmdb r3, {r0, r1}
vldr.32 s0, [sp, #16]
vldr.32 s1, [sp, #20]
add sp, sp, #24
@ sp needed
bx lr
And this is just saving and restoring the values that came in in s0 and s1 from
the stack.
>From gcc-bugs-return-523021-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 22:46:00 2016
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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/70717] missing warning on trivial buffer overflow
Date: Fri, 22 Apr 2016 22:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70717
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-22
CC| |msebor at gcc dot gnu.org
Component|sanitizer |tree-optimization
Summary|-fsanitize=object-size as |missing warning on trivial
|warning |buffer overflow
Ever confirmed|0 |1
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
I agree there's an opportunity to diagnose a subset of buffer overflows and
other simple out-of-bounds accesses during translation and without
optimization. For example, in the slightly less trivial example below, the
call to memcpy() clearly overwrites the destination buffer and could be
diagnosed (it is neither diagnosed nor prevented with _FORTIFY_SOURCE):
void f (unsigned N)
{
int a [N];
read (0, a, sizeof a);
char b [N];
memcpy (b, a, sizeof a);
write (1, b, sizeof a);
}
Rather than in the sanitizer which typically involves run-time instrumentation
and has a considerable performance overhead, I think it would be better done in
GCC under the -Warray-bounds option (without requiring optimization for the
simple cases). -Warray-bounds doesn't warn about code like the above even when
the value of N is a known (including a constant expression).
_FORTIFY_SOURCE could also be enhanced to detect this problem. Since this
latter part is something I'm supposed to be looking into I'll confirm this
request, adjust the Summary, and for lack of a better alternative set the
Component to tree-optimization.
>From gcc-bugs-return-523022-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 23:14:57 2016
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Subject: [Bug c/57137] spurious "format string is not literal" when the format string is marked with __attribute__((format))
Date: Fri, 22 Apr 2016 23:14:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-22
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. In addition, as the example below illustrates, the warning in this
case is issued for the call where it could be avoided (in function g) and not
for the call that should be diagnosed (in function h).
$ cat v.c && gcc -S -Wformat -Wformat-nonliteral v.c
void f (const char*, ...) __attribute__ ((format (printf, 1, 2)));
void g (const char*) __attribute__ ((format (printf, 1, 0)));
void g (const char *fmt)
{
f (fmt, "xxx");
}
void h (const char *fmt)
{
g (fmt);
}
v.c: In function ‘g’:
v.c:6:3: warning: format not a string literal, argument types not checked
[-Wformat-nonliteral]
f (fmt, "xxx");
^
>From gcc-bugs-return-523023-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 22 23:31:50 2016
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Subject: [Bug libstdc++/70766] New: stream iterators, shared_lock, and atomic<T> should all use addressof and not &
Date: Fri, 22 Apr 2016 23:31:00 -0000
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Bug ID: 70766
Summary: stream iterators, shared_lock, and atomic<T> should
all use addressof and not &
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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Priority: P3
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Target Milestone: ---
1) istream_iterator and ostream_iterator's constructors and istream_iterator's
operator-> should use __addressof (this is LWG issue 2576).
2) shared_lock's constructors should use addressof (LWG issue 2577).
unique_lock's constructors already do that.
3) The primary atomic<_Tp> template uses & in many places where it should be
using addressof.
>From gcc-bugs-return-523024-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 00:27:14 2016
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Subject: [Bug c++/70767] New: std::numeric_limits<const unsigned char>::digits is wrong unless --std=c++11 used
Date: Sat, 23 Apr 2016 00:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70767
Bug ID: 70767
Summary: std::numeric_limits<const unsigned char>::digits is
wrong unless --std=c++11 used
Product: gcc
Version: 4.8.5
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
Created attachment 38331
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38331&action=edit
bash script, see bug description
The value is not 8. The problem also exists in version 4.9.3. The attachment
is a bash script that creates the file ex.cpp. It then compiles several times
to show the cases where the bug does and does not happen.
>From gcc-bugs-return-523025-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 03:57:28 2016
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From: "jamrial at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70768] New: Increased compilation time
Date: Sat, 23 Apr 2016 03:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70768
Bug ID: 70768
Summary: Increased compilation time
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jamrial at gmail dot com
Target Milestone: ---
Created attachment 38332
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38332&action=edit
Preprocessed output
The attached preprocessed output (Created from the source using GCC 5, 6 and 7
for the purpose of this ticket) takes almost twice as long to compile using GCC
6.0.1 RC and especially GCC 7.0 compared to GCC 5.3 on a linux x86_64 machine
with 2gb of RAM.
> GCC 5.3.0, ArchLinux package
[jamrial@ArchVM ~]$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc/src/gcc-5-20160209/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --disable-multilib --disable-werror
--enable-checking=release
Thread model: posix
gcc version 5.3.0 (GCC)
[jamrial@ArchVM ~]$ time c++ -ftemplate-backtrace-limit=0 -Wall -Wextra
-pedantic -Werror -pedantic-errors -Wno-error=deprecated-declarations
-Wno-missing-field-initializers -Wno-unused-parameter -march=haswell -Ofast -g0
-std=gnu++14 -o transform_gcc5.o -c transform_gcc5.ii
real 1m13.380s
user 1m11.920s
sys 0m0.793s
[jamrial@ArchVM ~]$ time c++ -ftemplate-backtrace-limit=0 -Wall -Wextra
-pedantic -Werror -pedantic-errors -Wno-error=deprecated-declarations
-Wno-missing-field-initializers -Wno-unused-parameter -march=haswell -Ofast -g0
-std=gnu++14 -o transform_gcc6.o -c transform_gcc6.ii
real 1m32.820s
user 1m23.093s
sys 0m1.457s
[jamrial@ArchVM ~]$ time c++ -ftemplate-backtrace-limit=0 -Wall -Wextra
-pedantic -Werror -pedantic-errors -Wno-error=deprecated-declarations
-Wno-missing-field-initializers -Wno-unused-parameter -march=haswell -Ofast -g0
-std=gnu++14 -o transform_gcc7.o -c transform_gcc7.ii
real 1m31.705s
user 1m20.663s
sys 0m1.490s
> GCC 6.0.1 RC
[jamrial@ArchVM ~]$ gcc-6 -v
Using built-in specs.
COLLECT_GCC=gcc-6
COLLECT_LTO_WRAPPER=/usr/local/lib/gcc/x86_64-pc-linux-gnu/6.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/jamrial/gcc-svn/configure --prefix=/usr/local
--libdir=/usr/local/lib --libexecdir=/usr/local/lib
--mandir=/usr/local/share/man --infodir=/usr/local/share/info
--enable-languages=c,c++,lto --enable-shared --enable-threads=posix
--enable-libmpx --with-system-zlib --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-bootstrap --disable-werror
Thread model: posix
gcc version 6.0.1 20160415 (prerelease) (GCC)
[jamrial@ArchVM ~]$ time c++-6 -ftemplate-backtrace-limit=0 -Wall -Wextra
-pedantic -Werror -pedantic-errors -Wno-error=deprecated-declarations
-Wno-missing-field-initializers -Wno-unused-parameter -march=haswell -Ofast -g0
-std=gnu++14 -o transform_gcc5.o -c transform_gcc5.ii
real 1m14.796s
user 1m13.520s
sys 0m0.787s
[jamrial@ArchVM ~]$ time c++-6 -ftemplate-backtrace-limit=0 -Wall -Wextra
-pedantic -Werror -pedantic-errors -Wno-error=deprecated-declarations
-Wno-missing-field-initializers -Wno-unused-parameter -march=haswell -Ofast -g0
-std=gnu++14 -o transform_gcc6.o -c transform_gcc6.ii
real 2m29.020s
user 1m25.240s
sys 0m6.537s
[jamrial@ArchVM ~]$ time c++-6 -ftemplate-backtrace-limit=0 -Wall -Wextra
-pedantic -Werror -pedantic-errors -Wno-error=deprecated-declarations
-Wno-missing-field-initializers -Wno-unused-parameter -march=haswell -Ofast -g0
-std=gnu++14 -o transform_gcc7.o -c transform_gcc7.ii
real 2m27.268s
user 1m23.977s
sys 0m7.167s
> GCC 7.0
[jamrial@ArchVM ~]$ gcc-7 -v
Using built-in specs.
COLLECT_GCC=gcc-7
COLLECT_LTO_WRAPPER=/usr/local/lib/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/jamrial/gcc-svn/configure --prefix=/usr/local
--libdir=/usr/local/lib --libexecdir=/usr/local/lib
--mandir=/usr/local/share/man --infodir=/usr/local/share/info
--enable-languages=c,c++,lto --enable-shared --enable-threads=posix
--enable-libmpx --with-system-zlib --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-bootstrap --disable-werror
Thread model: posix
gcc version 7.0.0 20160422 (experimental) (GCC)
[jamrial@ArchVM ~]$ time c++-7 -ftemplate-backtrace-limit=0 -Wall -Wextra
-pedantic -Werror -pedantic-errors -Wno-error=deprecated-declarations
-Wno-missing-field-initializers -Wno-unused-parameter -march=haswell -Ofast -g0
-std=gnu++14 -o transform_gcc5.o -c transform_gcc5.ii
real 1m57.807s
user 1m56.673s
sys 0m1.057s
[jamrial@ArchVM ~]$ time c++-7 -ftemplate-backtrace-limit=0 -Wall -Wextra
-pedantic -Werror -pedantic-errors -Wno-error=deprecated-declarations
-Wno-missing-field-initializers -Wno-unused-parameter -march=haswell -Ofast -g0
-std=gnu++14 -o transform_gcc6.o -c transform_gcc6.ii
real 2m20.146s
user 2m19.220s
sys 0m0.817s
[jamrial@ArchVM ~]$ time c++-7 -ftemplate-backtrace-limit=0 -Wall -Wextra
-pedantic -Werror -pedantic-errors -Wno-error=deprecated-declarations
-Wno-missing-field-initializers -Wno-unused-parameter -march=haswell -Ofast -g0
-std=gnu++14 -o transform_gcc7.o -c transform_gcc7.ii
real 2m22.689s
user 2m21.773s
sys 0m0.860s
GCC 5.3 performed the best for all three preprocessed files.
GCC 6.0.1 performed about the same as GCC 5.3 using the gcc5 preprocessed file.
It however trashed my HDD a lot trying to compile the preprocessed output from
both GCC 6 and GCC 7, and took longer to finish them. This may hint at
increased RAM usage and explain the odd time values, but i didn't check.
GCC 7 performed the worst across the table, even with the gcc5 preprocessed
file.
>From gcc-bugs-return-523026-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 03:59:33 2016
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Subject: [Bug libstdc++/70745] Wrong handling of regex_constant::match_not_eow and regex_constant::match_not_bow
Date: Sat, 23 Apr 2016 03:59:00 -0000
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--- Comment #2 from Tim Shen <timshen at gcc dot gnu.org> ---
Author: timshen
Date: Sat Apr 23 03:58:37 2016
New Revision: 235382
URL: https://gcc.gnu.org/viewcvs?rev=235382&root=gcc&view=rev
Log:
PR libstdc++/70745
* include/bits/regex_executor.tcc (_Executor<>::_M_word_boundary):
Fix the match_not_bow and match_not_eow behavior.
* testsuite/28_regex/regression.cc: Add testcase.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/regex_executor.tcc
trunk/libstdc++-v3/testsuite/28_regex/regression.cc
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Subject: [Bug sanitizer/70712] False positive from AddressSanitizer with use of 'alignas'
Date: Sat, 23 Apr 2016 05:29:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Apr 23 05:28:16 2016
New Revision: 235384
URL: https://gcc.gnu.org/viewcvs?rev=235384&root=gcc&view=rev
Log:
PR sanitizer/70712
* cfgexpand.c (expand_stack_vars): Fix typo.
* c-c++-common/asan/pr70712.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/asan/pr70712.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgexpand.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-523028-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 06:52:38 2016
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Subject: [Bug c++/70768] Increased compilation time
Date: Sat, 23 Apr 2016 06:52:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |INVALID
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to James Almer from comment #0)
> Created attachment 38332 [details]
> Preprocessed output
>
> The attached preprocessed output (Created from the source using GCC 5, 6 and
> 7 for the purpose of this ticket) takes almost twice as long to compile
> using GCC 6.0.1 RC and especially GCC 7.0 compared to GCC 5.3 on a linux
> x86_64 machine with 2gb of RAM.
>
> GCC 5.3 performed the best for all three preprocessed files.
> GCC 6.0.1 performed about the same as GCC 5.3 using the gcc5 preprocessed
> file. It however trashed my HDD a lot trying to compile the preprocessed
> output from both GCC 6 and GCC 7, and took longer to finish them. This may
> hint at increased RAM usage and explain the odd time values, but i didn't
> check.
> GCC 7 performed the worst across the table, even with the gcc5 preprocessed
> file.
Well, you simply need more RAM to compile this testcase, because gcc-6 uses
slightly over 2GB peak, so your machine starts swapping.
On my machine (with 8GB RAM) gcc-6 is actually slightly faster.
(For gcc-7 you need to configure it with --enable-checking=release to compare
timings.)
>From gcc-bugs-return-523029-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 06:55:00 2016
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Subject: [Bug c++/70767] std::numeric_limits<const unsigned char>::digits is wrong unless --std=c++11 used
Date: Sat, 23 Apr 2016 06:55:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#559
It has status CD1, I don't remember if that means it applies retroactively or
not.
(by the way, the 4.8 branch is not maintained anymore)
>From gcc-bugs-return-523030-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 08:44:23 2016
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From: "fourmisain+gcc at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70769] New: function definition wrongfully allowed inside comma separated member declaration list
Date: Sat, 23 Apr 2016 08:44:00 -0000
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Bug ID: 70769
Summary: function definition wrongfully allowed inside comma
separated member declaration list
Product: gcc
Version: 5.2.0
Status: UNCONFIRMED
Severity: trivial
Priority: P3
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This code should not compile while it does:
class C {
int n, f(int) {
return 42;
}
};
To break it down (using C++14 standard draft n4140), the only
member-declaration (§9.2) which declares multiple members at once is of the
form
attribute-specifier-seq(opt) decl-specifier-seq(opt)
member-declarator-list(opt);
Note that in the above code, the required semicolon at the end is missing, so
this is already in violation of the standard, but the code still compiles
without even a warning (using -std=c++14 -Wall -pedantic) if you add that
missing semicolon.
So continuing the argument, "int n, f(int) {return 42;}" would have to be a
member-declarator-list, so "f(int){return 42;}" would have to be a
member-declarator and since it does not contain a colon it is one of the two:
declarator virt-specifier-seq(opt) pure-specifier(opt)
declarator brace-or-equal-initializer(opt)
Since "{return 42;}" is not a valid brace-or-equal-initializer, "f(int){return
42;}" has to be a declarator.
Afaik, this is not true and it also conflicts with the following:
If it were a declarator, you would be allowed to use it inside a
init-declarator-list, therefore the following code would have to compile:
int n, f(int) {
return 42;
}
But it (rightfully) does not:
"error: a function-definition is not allowed here before '{' token"
So this error message needs to be applied to the above class case.
--------
I was made aware that the above "hack" is often used on CodeFights to save
precious characters. They seems to wrap code into a class and compile it with
g++ 5.0.
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Sat, 23 Apr 2016 11:23:00 -0000
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--- Comment #39 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to David Edelsohn from comment #38)
> The gt* files don't differ.
>
> I normally use
>
> --disable-werror --enable-languages=c,c++,fortran,objc --with-gmp=/opt/cfarm
> --with-libiconv-prefix=/opt/cfarm --disable-libstdcxx-pch
> --with-included-gettext --enable-checking=release
Used
/home/jakub/gcc-6.0.1-RC-20160415/configure --disable-werror
--enable-languages=c,c++,fortran,objc --with-gmp=/opt/cfarm
--with-libiconv-prefix=/opt/cfarm --disable-libstdcxx-pch
--with-included-gettext --enable-checking=release
myself now (inside of /home/jakub/rc1/) and it bootstrapped just fine too.
>From gcc-bugs-return-523032-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 11:25:14 2016
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Subject: [Bug ada/70759] Ada rts fails to build with -mabi=ilp32
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70759
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-23
CC| |ebotcazou at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
internal_reference_types probably needs to go away.
>From gcc-bugs-return-523033-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 15:27:46 2016
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Subject: [Bug target/69143] PowerPC64: aggregate results are badly handled
Date: Sat, 23 Apr 2016 15:27:00 -0000
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Similar to PR 28831, PR 23782?
>From gcc-bugs-return-523034-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 16:39:31 2016
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From: "dje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Sat, 23 Apr 2016 16:39:00 -0000
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--- Comment #40 from David Edelsohn <dje at gcc dot gnu.org> ---
I see that you did not have /opt/freeware/bin in your path on AIX. How did it
even build without GNU Make and other build requirements?
>From gcc-bugs-return-523035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 16:48:00 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Sat, 23 Apr 2016 16:48:00 -0000
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--- Comment #41 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to David Edelsohn from comment #40)
> I see that you did not have /opt/freeware/bin in your path on AIX. How did
> it even build without GNU Make and other build requirements?
I've used gmake -j64 instead of make -j64.
I can retry with PATH=/opt/freeware/bin:$PATH instead, sure.
Do you use relative or absolute path from the build dir to the source dir btw?
On my boxes I almost always create a subdir of the source dir and do
../configure ..., but on this box I've placed the build dir next to the source
dir and used absolute pathname.
>From gcc-bugs-return-523036-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 16:49:10 2016
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From: "mmehlich at semanticdesigns dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/66256] noexcept evaluation done before end of class
Date: Sat, 23 Apr 2016 16:49:00 -0000
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Michael Mehlich <mmehlich at semanticdesigns dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mmehlich at semanticdesigns dot co
| |m
--- Comment #1 from Michael Mehlich <mmehlich at semanticdesigns dot com> ---
I agree, name resolution should consider all declarations in the class,
but apparently gcc does name resolution on the exception specification way too
early.
An example where this causes no error message being created for obviously wrong
code is the swap function in the pair template in the header file
bits/stl_pair.h (for gcc 5.3.0/cygwin), which is declared as
void
swap(pair& __p)
noexcept(noexcept(swap(first, __p.first))
&& noexcept(swap(second, __p.second)))
clang 3.7.1. properly reports an error for the swap in the exception
specification.
BTW: The header file could be fixed easily by adding std:: in front of these
swap occurrences.
>From gcc-bugs-return-523037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 17:06:39 2016
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Subject: [Bug c++/70770] New: constexpr expansion Internal compiler error
Date: Sat, 23 Apr 2016 17:06:00 -0000
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Bug ID: 70770
Summary: constexpr expansion Internal compiler error
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Command line:
/usr/bin/g++ -DDEBUG -DRUN_UNITTEST -DUNDER_LINUX -D_GLIBCXX_USE_CXX11_ABI=0
-I../. -I. -fno-common -ffunction-sections -fdata-sections -fno-rtti -pedantic
-pthread -Wvariadic-macros -fsigned-char -Wabi -Wabi-tag -Wall -Warray-bounds
-Wbool-compare -Wcast-align -Wcomment -Wconversion -Wdeprecated-declarations
-Wdelete-incomplete -Wdisabled-optimization -Wempty-body -Wenum-compare -Wextra
-Wformat -Wformat-extra-args -Wformat-security -Wformat-zero-length
-Wchar-subscripts -Winit-self -Wint-to-pointer-cast -Winvalid-pch
-Wlogical-not-parentheses -Wlogical-op -Wmissing-braces
-Wmissing-field-initializers -Wmissing-format-attribute -Wmissing-noreturn
-Wno-inline -Wno-long-long -Wunknown-pragmas -Wnonnull -Wodr -Woverflow
-Wpacked -Wparentheses -Wpointer-arith -Wredundant-decls -Wreturn-type
-Wsequence-point -Wshadow -Wshift-count-negative -Wshift-count-overflow
-Wsign-compare -Wsign-conversion -Wsizeof-array-argument
-Wsizeof-pointer-memaccess -Wstrict-aliasing -Wstrict-overflow -Wswitch
-Wswitch-bool -Wswitch-default -Wswitch-enum -Wtrigraphs -Wundef
-Wuninitialized -O0 -Wunused-but-set-parameter -Wunused-but-set-variable
-Wunused-function -Wunused-label -Wunused-parameter -Wunused-value
-Wunused-variable -Wunknown-pragmas -Wunreachable-code -Wwrite-strings
-Wabi-tag -Wcast-qual -Wdelete-non-virtual-dtor -Wdeprecated
-Wno-format-nonliteral -Wnon-virtual-dtor -Wold-style-cast -Woverloaded-virtual
-Wreorder -Wsign-promo -Wsuggest-final-methods -Wsuggest-final-types
-Wunused-macros -ftrapv -fno-omit-frame-pointer -fstack-protector
-fstack-protector-all -Wstack-protector -O0 -fsanitize=address
-Wno-exit-time-destructors -Wno-global-constructors -Wno-format-nonliteral
-Wno-missing-format-attribute -ansi -std=c++14 -Werror -g -MMD -MT
game/CMakeFiles/game.dir/ray.cpp.o -MF game/CMakeFiles/game.dir/ray.cpp.o.d -o
game/CMakeFiles/game.dir/ray.cpp.o -c ../game/ray.cpp -v -save-temps
>From gcc-bugs-return-523038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 17:07:27 2016
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From: "mira.fontan at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70770] constexpr expansion Internal compiler error
Date: Sat, 23 Apr 2016 17:07:00 -0000
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--- Comment #1 from Mira Fontan <mira.fontan at gmail dot com> ---
Command line output:
Using built-in specs.
COLLECT_GCC=/usr/bin/g++
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)
COLLECT_GCC_OPTIONS='-D' 'DEBUG' '-D' 'RUN_UNITTEST' '-D' 'UNDER_LINUX' '-D'
'_GLIBCXX_USE_CXX11_ABI=0' '-I' '../.' '-I' '.' '-fno-common'
'-ffunction-sections' '-fdata-sections' '-fno-rtti' '-Wpedantic' '-pthread'
'-Wvariadic-macros' '-fsigned-char' '-Wabi' '-Wall' '-Warray-bounds'
'-Wbool-compare' '-Wcast-align' '-Wcomment' '-Wconversion'
'-Wdeprecated-declarations' '-Wdelete-incomplete' '-Wdisabled-optimization'
'-Wempty-body' '-Wenum-compare' '-Wextra' '-Wformat=1' '-Wformat-extra-args'
'-Wformat-security' '-Wformat-zero-length' '-Wchar-subscripts' '-Winit-self'
'-Wint-to-pointer-cast' '-Winvalid-pch' '-Wlogical-not-parentheses'
'-Wlogical-op' '-Wmissing-braces' '-Wmissing-field-initializers'
'-Wsuggest-attribute=noreturn' '-Wno-inline' '-Wno-long-long' '-Wnonnull'
'-Wodr' '-Woverflow' '-Wpacked' '-Wparentheses' '-Wpointer-arith'
'-Wredundant-decls' '-Wreturn-type' '-Wsequence-point' '-Wshadow'
'-Wshift-count-negative' '-Wshift-count-overflow' '-Wsign-compare'
'-Wsign-conversion' '-Wsizeof-array-argument' '-Wsizeof-pointer-memaccess'
'-Wstrict-aliasing' '-Wstrict-overflow' '-Wswitch' '-Wswitch-bool'
'-Wswitch-default' '-Wswitch-enum' '-Wtrigraphs' '-Wundef' '-Wuninitialized'
'-O0' '-Wunused-but-set-parameter' '-Wunused-but-set-variable'
'-Wunused-function' '-Wunused-label' '-Wunused-parameter' '-Wunused-value'
'-Wunused-variable' '-Wunknown-pragmas' '-Wwrite-strings' '-Wabi-tag'
'-Wcast-qual' '-Wdelete-non-virtual-dtor' '-Wdeprecated' '-Wnon-virtual-dtor'
'-Wold-style-cast' '-Woverloaded-virtual' '-Wreorder' '-Wsign-promo'
'-Wsuggest-final-methods' '-Wsuggest-final-types' '-Wunused-macros' '-ftrapv'
'-fno-omit-frame-pointer' '-fstack-protector' '-fstack-protector-all'
'-Wstack-protector' '-O0' '-fsanitize=address' '-Wno-exit-time-destructors'
'-Wno-global-constructors' '-Wno-format-nonliteral'
'-Wno-suggest-attribute=format' '-ansi' '-std=c++14' '-Werror' '-g' '-MMD'
'-MT' 'game/CMakeFiles/game.dir/ray.cpp.o' '-MF'
'game/CMakeFiles/game.dir/ray.cpp.o.d' '-o'
'game/CMakeFiles/game.dir/ray.cpp.o' '-c' '-v' '-save-temps' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -E -quiet -v -I ../. -I . -imultiarch
x86_64-linux-gnu -MMD game/CMakeFiles/game.dir/ray.cpp.d -MF
game/CMakeFiles/game.dir/ray.cpp.o.d -MT game/CMakeFiles/game.dir/ray.cpp.o
-D_GNU_SOURCE -D_REENTRANT -D DEBUG -D RUN_UNITTEST -D UNDER_LINUX -D
_GLIBCXX_USE_CXX11_ABI=0 ../game/ray.cpp -mtune=generic -march=x86-64 -ansi
-std=c++14 -Wpedantic -Wvariadic-macros -Wabi -Wall -Warray-bounds
-Wbool-compare -Wcast-align -Wcomment -Wconversion -Wdeprecated-declarations
-Wdelete-incomplete -Wdisabled-optimization -Wempty-body -Wenum-compare -Wextra
-Wformat=1 -Wformat-extra-args -Wformat-security -Wformat-zero-length
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-Wlogical-not-parentheses -Wlogical-op -Wmissing-braces
-Wmissing-field-initializers -Wsuggest-attribute=noreturn -Wno-inline
-Wno-long-long -Wnonnull -Wodr -Woverflow -Wpacked -Wparentheses
-Wpointer-arith -Wredundant-decls -Wreturn-type -Wsequence-point -Wshadow
-Wshift-count-negative -Wshift-count-overflow -Wsign-compare -Wsign-conversion
-Wsizeof-array-argument -Wsizeof-pointer-memaccess -Wstrict-aliasing
-Wstrict-overflow -Wswitch -Wswitch-bool -Wswitch-default -Wswitch-enum
-Wtrigraphs -Wundef -Wuninitialized -Wunused-but-set-parameter
-Wunused-but-set-variable -Wunused-function -Wunused-label -Wunused-parameter
-Wunused-value -Wunused-variable -Wunknown-pragmas -Wwrite-strings -Wabi-tag
-Wcast-qual -Wdelete-non-virtual-dtor -Wdeprecated -Wnon-virtual-dtor
-Wold-style-cast -Woverloaded-virtual -Wreorder -Wsign-promo
-Wsuggest-final-methods -Wsuggest-final-types -Wunused-macros -Wstack-protector
-Wno-exit-time-destructors -Wno-global-constructors -Wno-format-nonliteral
-Wno-suggest-attribute=format -Werror -fno-common -ffunction-sections
-fdata-sections -fno-rtti -fsigned-char -ftrapv -fno-omit-frame-pointer
-fstack-protector -fstack-protector-all -fsanitize=address -g
-fworking-directory -O0 -O0 -fpch-preprocess -Wformat-security -o ray.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/5"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/5/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
../.
.
/usr/include/c++/5
/usr/include/x86_64-linux-gnu/c++/5
/usr/include/c++/5/backward
/usr/lib/gcc/x86_64-linux-gnu/5/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-D' 'DEBUG' '-D' 'RUN_UNITTEST' '-D' 'UNDER_LINUX' '-D'
'_GLIBCXX_USE_CXX11_ABI=0' '-I' '../.' '-I' '.' '-fno-common'
'-ffunction-sections' '-fdata-sections' '-fno-rtti' '-Wpedantic' '-pthread'
'-Wvariadic-macros' '-fsigned-char' '-Wabi' '-Wall' '-Warray-bounds'
'-Wbool-compare' '-Wcast-align' '-Wcomment' '-Wconversion'
'-Wdeprecated-declarations' '-Wdelete-incomplete' '-Wdisabled-optimization'
'-Wempty-body' '-Wenum-compare' '-Wextra' '-Wformat=1' '-Wformat-extra-args'
'-Wformat-security' '-Wformat-zero-length' '-Wchar-subscripts' '-Winit-self'
'-Wint-to-pointer-cast' '-Winvalid-pch' '-Wlogical-not-parentheses'
'-Wlogical-op' '-Wmissing-braces' '-Wmissing-field-initializers'
'-Wsuggest-attribute=noreturn' '-Wno-inline' '-Wno-long-long' '-Wnonnull'
'-Wodr' '-Woverflow' '-Wpacked' '-Wparentheses' '-Wpointer-arith'
'-Wredundant-decls' '-Wreturn-type' '-Wsequence-point' '-Wshadow'
'-Wshift-count-negative' '-Wshift-count-overflow' '-Wsign-compare'
'-Wsign-conversion' '-Wsizeof-array-argument' '-Wsizeof-pointer-memaccess'
'-Wstrict-aliasing' '-Wstrict-overflow' '-Wswitch' '-Wswitch-bool'
'-Wswitch-default' '-Wswitch-enum' '-Wtrigraphs' '-Wundef' '-Wuninitialized'
'-O0' '-Wunused-but-set-parameter' '-Wunused-but-set-variable'
'-Wunused-function' '-Wunused-label' '-Wunused-parameter' '-Wunused-value'
'-Wunused-variable' '-Wunknown-pragmas' '-Wwrite-strings' '-Wabi-tag'
'-Wcast-qual' '-Wdelete-non-virtual-dtor' '-Wdeprecated' '-Wnon-virtual-dtor'
'-Wold-style-cast' '-Woverloaded-virtual' '-Wreorder' '-Wsign-promo'
'-Wsuggest-final-methods' '-Wsuggest-final-types' '-Wunused-macros' '-ftrapv'
'-fno-omit-frame-pointer' '-fstack-protector' '-fstack-protector-all'
'-Wstack-protector' '-O0' '-fsanitize=address' '-Wno-exit-time-destructors'
'-Wno-global-constructors' '-Wno-format-nonliteral'
'-Wno-suggest-attribute=format' '-ansi' '-std=c++14' '-Werror' '-g' '-MMD'
'-MT' 'game/CMakeFiles/game.dir/ray.cpp.o' '-MF'
'game/CMakeFiles/game.dir/ray.cpp.o.d' '-o'
'game/CMakeFiles/game.dir/ray.cpp.o' '-c' '-v' '-save-temps' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -fpreprocessed ray.ii -quiet -dumpbase
ray.cpp -mtune=generic -march=x86-64 -auxbase-strip
game/CMakeFiles/game.dir/ray.cpp.o -g -O0 -O0 -Wpedantic -Wvariadic-macros
-Wabi -Wall -Warray-bounds -Wbool-compare -Wcast-align -Wcomment -Wconversion
-Wdeprecated-declarations -Wdelete-incomplete -Wdisabled-optimization
-Wempty-body -Wenum-compare -Wextra -Wformat=1 -Wformat-extra-args
-Wformat-security -Wformat-zero-length -Wchar-subscripts -Winit-self
-Wint-to-pointer-cast -Winvalid-pch -Wlogical-not-parentheses -Wlogical-op
-Wmissing-braces -Wmissing-field-initializers -Wsuggest-attribute=noreturn
-Wno-inline -Wno-long-long -Wnonnull -Wodr -Woverflow -Wpacked -Wparentheses
-Wpointer-arith -Wredundant-decls -Wreturn-type -Wsequence-point -Wshadow
-Wshift-count-negative -Wshift-count-overflow -Wsign-compare -Wsign-conversion
-Wsizeof-array-argument -Wsizeof-pointer-memaccess -Wstrict-aliasing
-Wstrict-overflow -Wswitch -Wswitch-bool -Wswitch-default -Wswitch-enum
-Wtrigraphs -Wundef -Wuninitialized -Wunused-but-set-parameter
-Wunused-but-set-variable -Wunused-function -Wunused-label -Wunused-parameter
-Wunused-value -Wunused-variable -Wunknown-pragmas -Wwrite-strings -Wabi-tag
-Wcast-qual -Wdelete-non-virtual-dtor -Wdeprecated -Wnon-virtual-dtor
-Wold-style-cast -Woverloaded-virtual -Wreorder -Wsign-promo
-Wsuggest-final-methods -Wsuggest-final-types -Wunused-macros -Wstack-protector
-Wno-exit-time-destructors -Wno-global-constructors -Wno-format-nonliteral
-Wno-suggest-attribute=format -Werror -ansi -std=c++14 -version -fno-common
-ffunction-sections -fdata-sections -fno-rtti -fsigned-char -ftrapv
-fno-omit-frame-pointer -fstack-protector -fstack-protector-all
-fsanitize=address -Wformat-security -o ray.s
GNU C++14 (Ubuntu 5.3.1-14ubuntu2) version 5.3.1 20160413 (x86_64-linux-gnu)
compiled by GNU C version 5.3.1 20160413, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++14 (Ubuntu 5.3.1-14ubuntu2) version 5.3.1 20160413 (x86_64-linux-gnu)
compiled by GNU C version 5.3.1 20160413, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: a544146c1c8bd944ae4c4ff6181f339e
In file included from ../game/ray.cpp:8:0:
.././game/ray.h:134:43: in constexpr expansion of ‘OneThreat()’
.././game/ray.h:134:43: internal compiler error: Segmentation fault
mutable OneThreat m_tsv[kMaxBoard] = {}; /**<
threats on ray */
^
>From gcc-bugs-return-523039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 17:10:15 2016
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From: "mira.fontan at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70770] constexpr expansion Internal compiler error
Date: Sat, 23 Apr 2016 17:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70770
--- Comment #2 from Mira Fontan <mira.fontan at gmail dot com> ---
Created attachment 38333
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38333&action=edit
preprocessed file
>From gcc-bugs-return-523040-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 17:55:48 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70771] New: ICE on valid code at -O3 on x86_64-linux-gnu in operator[], at vec.h:714
Date: Sat, 23 Apr 2016 17:55:00 -0000
X-Bugzilla-Reason: CC
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70771
Bug ID: 70771
Summary: ICE on valid code at -O3 on x86_64-linux-gnu in
operator[], at vec.h:714
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current gcc trunk at
-O3 on x86_64-linux-gnu in both 32-bit and 64-bit modes.
It is a regression from 5.3.x.
$ 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/7.0.0/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 7.0.0 20160423 (experimental) [trunk revision 235384] (GCC)
$
$ gcc-trunk -O2 small.c; ./a.out
$ gcc-5.3 -O3 small.c; ./a.out
$
$ gcc-trunk -O3 small.c
small.c: In function ‘main’:
small.c:18:1: internal compiler error: in operator[], at vec.h:714
main ()
^~~~
0xba5e89 vec<edge_def*, va_gc, vl_embed>::operator[](unsigned int)
../../gcc-source-trunk/gcc/vec.h:714
0xba5e89 gimple_phi_arg_edge
../../gcc-source-trunk/gcc/gimple.h:4339
0xba5e89 replace_uses_by(tree_node*, tree_node*)
../../gcc-source-trunk/gcc/tree-cfg.c:1818
0xba60b1 gimple_merge_blocks
../../gcc-source-trunk/gcc/tree-cfg.c:1938
0x74cf75 merge_blocks(basic_block_def*, basic_block_def*)
../../gcc-source-trunk/gcc/cfghooks.c:787
0xbaecc4 cleanup_tree_cfg_bb
../../gcc-source-trunk/gcc/tree-cfgcleanup.c:660
0xbaf598 cleanup_tree_cfg_1
../../gcc-source-trunk/gcc/tree-cfgcleanup.c:710
0xbaf598 cleanup_tree_cfg_noloop
../../gcc-source-trunk/gcc/tree-cfgcleanup.c:761
0xbaf598 cleanup_tree_cfg()
../../gcc-source-trunk/gcc/tree-cfgcleanup.c:812
0xa9ad74 execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1921
0xa9b7cb execute_todo
../../gcc-source-trunk/gcc/passes.c:2020
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.
$
------------------------------------
int a, b, c, d;
static void
fn1 ()
{
for (b = 0; b < 1; b++)
for (c = 0; c < 1; c++)
{
if (a)
break;
b = 1;
}
for (;;)
;
}
int
main ()
{
if (d)
fn1 ();
return 0;
}
>From gcc-bugs-return-523041-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 18:40:06 2016
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From: "ch3root at openwall dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70772] New: Wrong warning about unspecified behavior for comparison with string literal
Date: Sat, 23 Apr 2016 18:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70772
Bug ID: 70772
Summary: Wrong warning about unspecified behavior for
comparison with string literal
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
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Component: c
Assignee: unassigned at gcc dot gnu.org
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While compiling such program:
int main()
{
"abc" == "def";
}
I get this warning:
$ gcc -Wall -Wno-unused-value example.c
example.c: In function ‘main’:
example.c:3:9: warning: comparison with string literal results in unspecified
behavior [-Waddress]
"abc" == "def";
^~
The warning is wrong, this equality cannot be true.
I understand that the warning is intended to catch comparisons like "abc" ==
"abc" which indeed have an unspecified result. But the current warning is too
promiscuous.
The easy fix is to reformulate closer to "comparison with string literal is
always false or has an unspecified result".
The more thorough fix is to separately catch cases that could be proved to be
false at compile time.
>From gcc-bugs-return-523042-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 18:40:08 2016
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From: "jvdelisle at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
Date: Sat, 23 Apr 2016 18:40:00 -0000
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--- Comment #15 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to Andy May from comment #14)
--- snip ---
>
> Of course, I really appreciate the work that goes into this. I've already
> made a local patch file with your fix so that the mxe.cc gcc builds with it
> and now our program runs correctly.
>
Your testing and confirming the original issue is fixed helps greatly, thanks.
> I look after a project with ~2.5 million lines of Fortran, some which were
> written 40 years ago on punch cards.
So many of us learned on those punch cards. (yeeehah!)
>From gcc-bugs-return-523043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 18:46:05 2016
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From: "ch3root at openwall dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70772] Wrong warning about unspecified behavior for comparison with string literal
Date: Sat, 23 Apr 2016 18:46:00 -0000
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--- Comment #1 from Alexander Cherepanov <ch3root at openwall dot com> ---
clang bug -- https://llvm.org/bugs/show_bug.cgi?id=27495 .
>From gcc-bugs-return-523044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 19:05:53 2016
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From: "bruck.michael at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70755] [ARM] excessive struct alignment for globals
Date: Sat, 23 Apr 2016 19:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70755
--- Comment #2 from Michael Bruck <bruck.michael at googlemail dot com> ---
(In reply to Richard Earnshaw from comment #1)
> This is a deliberate design choice. By doing this we gain significant
> benefits from having aligned objects, which helps with data copying and
> other optimizations.
>
> Consider, for example, the object
>
> struct x
> {
> char a;
> char b;
> char c;
> char d;
> };
>
> struct x A, B;
>
> f()
> {
> B = A;
> }
>
> Since the objects are aligned then this function can be optimized to single
> 32-bit load and store operations that work very efficiently.
>
> As you've noticed, it is possible to force the alignment down to the
> architectural minimums by annotations, but for most users it makes little
> difference and the defaults are preferable.
"for most users"
Maybe I should have specified -mcortex-m0 on the command line to illustrate the
point. For most Cortex-M0 users with 16 kB this 300% memory waste is a bad
trade-off.
Can you implement a command line option to deactivate this behavior?
Your reply did not address b) and c), should I open a separate bug to discuss
these?
>From gcc-bugs-return-523045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 19:09:15 2016
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From: "bruck.michael at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70755] [ARM] excessive struct alignment for globals
Date: Sat, 23 Apr 2016 19:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70755
--- Comment #3 from Michael Bruck <bruck.michael at googlemail dot com> ---
(In reply to Michael Bruck from comment #2)
> (In reply to Richard Earnshaw from comment #1)
> > This is a deliberate design choice. By doing this we gain significant
> > benefits from having aligned objects, which helps with data copying and
> > other optimizations.
> >
> > Consider, for example, the object
> >
> > struct x
> > {
> > char a;
> > char b;
> > char c;
> > char d;
> > };
> >
> > struct x A, B;
> >
> > f()
> > {
> > B = A;
> > }
> >
> > Since the objects are aligned then this function can be optimized to single
> > 32-bit load and store operations that work very efficiently.
> >
> > As you've noticed, it is possible to force the alignment down to the
> > architectural minimums by annotations, but for most users it makes little
> > difference and the defaults are preferable.
>
> "for most users"
>
> Maybe I should have specified -mcortex-m0 on the command line to illustrate
> the point. For most Cortex-M0 users with 16 kB this 300% memory waste is a
> bad trade-off.
>
> Can you implement a command line option to deactivate this behavior?
>
> Your reply did not address b) and c), should I open a separate bug to
> discuss these?
A struct with only one bool does not derive the benefits described in your
example and should be exempted from this modified alignment for this reason
alone.(In reply to Richard Earnshaw from comment #1)
> This is a deliberate design choice. By doing this we gain significant
> benefits from having aligned objects, which helps with data copying and
> other optimizations.
>
> Consider, for example, the object
>
> struct x
> {
> char a;
> char b;
> char c;
> char d;
> };
>
> struct x A, B;
>
> f()
> {
> B = A;
> }
>
> Since the objects are aligned then this function can be optimized to single
> 32-bit load and store operations that work very efficiently.
>
> As you've noticed, it is possible to force the alignment down to the
> architectural minimums by annotations, but for most users it makes little
> difference and the defaults are preferable.
A struct with only one bool does not derive the benefits described in your
example and should be exempted from this modified alignment for this reason
alone.
>From gcc-bugs-return-523046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 19:13:16 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Sat, 23 Apr 2016 19:13:00 -0000
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--- Comment #42 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Even
PATH=/opt/freeware/bin/:$PATH /home/jakub/gcc-6.0.1-RC-20160415/configure
--disable-werror --enable-languages=c,c++,fortran,objc --with-gmp=/opt/cfarm
--with-libiconv-prefix=/opt/cfarm --disable-libstdcxx-pch
--with-included-gettext --enable-checking=release
PATH=/opt/freeware/bin/:$PATH make -j48 > LOG 2>&1 &
got through comparison without failure (still finishing bootstrap, but compare
file already exists).
>From gcc-bugs-return-523047-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 19:37:17 2016
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Subject: [Bug target/69143] PowerPC64: aggregate results are badly handled
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--- Comment #4 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #3)
> Similar to PR 28831, PR 23782?
Indeed, though looks more like a base case for PR28831 than PR23782 at first
glance.
Ramana
>From gcc-bugs-return-523048-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 20:13:25 2016
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Subject: [Bug rtl-optimization/70751] [7 Regression] FAIL: gcc.target/arm/eliminate.c scan-assembler-times r0,[\\t ]*sp 3 since r235184
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-23
CC| |ramana at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-523049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 20:19:19 2016
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Subject: [Bug c++/70768] Increased compilation time
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--- Comment #2 from James Almer <jamrial at gmail dot com> ---
(In reply to Markus Trippelsdorf from comment #1)
> Well, you simply need more RAM to compile this testcase, because gcc-6 uses
> slightly over 2GB peak, so your machine starts swapping.
> On my machine (with 8GB RAM) gcc-6 is actually slightly faster.
>
> (For gcc-7 you need to configure it with --enable-checking=release to
> compare timings.)
Tried to assign more RAM to the vm and it indeed fixed the trashing and
slowness with gcc-6 and newer.
gcc-6/7 uses like 2.1GB of RAM to compile this file whereas gcc-5 uses only
1.6GB. Is this intended/expected, or can it be considered a memory hog?
>From gcc-bugs-return-523050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 20:48:17 2016
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Subject: [Bug c++/70768] Increased compilation time
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--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to James Almer from comment #2)
> (In reply to Markus Trippelsdorf from comment #1)
> > Well, you simply need more RAM to compile this testcase, because gcc-6 uses
> > slightly over 2GB peak, so your machine starts swapping.
> > On my machine (with 8GB RAM) gcc-6 is actually slightly faster.
> >
> > (For gcc-7 you need to configure it with --enable-checking=release to
> > compare timings.)
>
> Tried to assign more RAM to the vm and it indeed fixed the trashing and
> slowness with gcc-6 and newer.
>
> gcc-6/7 uses like 2.1GB of RAM to compile this file whereas gcc-5 uses only
> 1.6GB. Is this intended/expected, or can it be considered a memory hog?
Maybe. gcc-5:
phase lang. deferred : 66.28 (84%) usr 2.57 (69%) sys 68.88 (83%) wall
2722388 kB (82%) ggc
phase opt and generate : 12.25 (15%) usr 0.92 (25%) sys 13.19 (16%) wall
469818 kB (14%) ggc
phase finalize : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
0 kB ( 0%) ggc
|name lookup : 1.80 ( 2%) usr 0.12 ( 3%) sys 1.99 ( 2%) wall
279075 kB ( 8%) ggc
|overload resolution : 58.89 (74%) usr 2.53 (68%) sys 61.26 (74%) wall
2619094 kB (79%) ggc
template instantiation : 60.34 (76%) usr 2.66 (72%) sys 62.90 (76%) wall
2791073 kB (84%) ggc
TOTAL : 79.35 3.72 83.14
3325932 kB
gcc-6:
phase lang. deferred : 74.36 (87%) usr 3.38 (72%) sys 77.73 (86%) wall
3725459 kB (84%) ggc
phase opt and generate : 10.30 (12%) usr 1.17 (25%) sys 11.46 (13%) wall
572078 kB (13%) ggc
|name lookup : 2.18 ( 3%) usr 0.27 ( 6%) sys 2.19 ( 2%) wall
134001 kB ( 3%) ggc
|overload resolution : 62.60 (73%) usr 3.25 (69%) sys 66.14 (73%) wall
3543436 kB (80%) ggc
template instantiation : 64.42 (75%) usr 3.42 (72%) sys 67.78 (75%) wall
3798026 kB (86%) ggc
TOTAL : 85.52 4.72 90.24
4424695 kB
>From gcc-bugs-return-523051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 20:51:31 2016
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Subject: [Bug gcov-profile/70773] New: Profiling makes sudoku solver slower
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70773
Bug ID: 70773
Summary: Profiling makes sudoku solver slower
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
Assignee: unassigned at gcc dot gnu.org
Reporter: tulipawn at gmail dot com
Target Milestone: ---
Created attachment 38334
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38334&action=edit
.c, .i and .gcda files
Compiling the attached sudoku solver the usual way and running the benchmark:
$ gcc -O3 -Wall sudoku.c -o sudokuC
$ time ./sudokuC 1>&2 > /dev/null
takes 1.25s, whereas doing a profile build:
$ gcc -O3 -Wall sudoku.c -o sudokuC -fprofile-generate
$ time ./sudokuC 1>&2 > /dev/null
$ gcc -O3 -Wall sudoku.c -o sudokuC -fprofile-use
$ time ./sudokuC 1>&2 > /dev/null
takes 1.5s which means it's 20% slower. Probably shouldn't happen.
>From gcc-bugs-return-523052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 20:52:46 2016
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Subject: [Bug c++/70768] Increased compilation time
Date: Sat, 23 Apr 2016 20:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70768
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
This is the file in question:
https://github.com/ericniebler/range-v3/blob/master/test/algorithm/transform.cpp
>From gcc-bugs-return-523053-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 21:06:23 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70353] [5 regression] ICE on __PRETTY_FUNCTION__ in a constexpr function
Date: Sat, 23 Apr 2016 21:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70353
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mira.fontan at gmail dot com
--- Comment #21 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
*** Bug 70770 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/70770] [5 Regression] constexpr expansion Internal compiler error
Date: Sat, 23 Apr 2016 21:06:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |DUPLICATE
Summary|constexpr expansion |[5 Regression] constexpr
|Internal compiler error |expansion Internal compiler
| |error
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 70353 ***
>From gcc-bugs-return-523055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 23 23:47:31 2016
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From: "steven.spark at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70774] New: constexpr function with reference parameter gives reinterpret_cast from integer to pointer error
Date: Sat, 23 Apr 2016 23:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70774
Bug ID: 70774
Summary: constexpr function with reference parameter gives
reinterpret_cast from integer to pointer error
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: steven.spark at gmail dot com
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Here is the simplified code:
--------------
#define PORTX (*(volatile unsigned char *)(0x1B))
constexpr volatile unsigned char * testRef(volatile unsigned char & x) {
return &x;
}
volatile unsigned char* addr = testRef(PORTX); /// OK
constexpr volatile unsigned char* addr2 = testRef(PORTX); /// error:
/// reinterpret_cast from integer to pointer
--------------
This compiled without problem with gcc 4.8.1, but fails with 4.9.2.
Using built-in specs.
COLLECT_GCC=avr-g++.exe
Target: avr
Configured with:
/home/toolsbuild/workspace/avr8-gnu-toolchain/src/gcc/configure
LDFLAGS=-L/home/toolsbuild/workspace/avr8-gnu-toolchain/avr8-gnu-toolchain-win32_x86-hostlibs/lib
CPPFLAGS= --target=avr --host=i686-w64-mingw32 --build=x86_64-pc-linux-gnu
--prefix=/home/toolsbuild/workspace/avr8-gnu-toolchain/avr8-gnu-toolchain-win32_x86
--libdir=/home/toolsbuild/workspace/avr8-gnu-toolchain/avr8-gnu-toolchain-win32_x86/lib
--enable-languages=c,c++ --with-dwarf2 --enable-doc --disable-shared
--disable-libada --disable-libssp --disable-nls --with-avrlibc=yes
--with-mpfr=/home/toolsbuild/workspace/avr8-gnu-toolchain/avr8-gnu-toolchain-win32_x86-hostlibs
--with-gmp=/home/toolsbuild/workspace/avr8-gnu-toolchain/avr8-gnu-toolchain-win32_x86-hostlibs
--with-mpc=/home/toolsbuild/workspace/avr8-gnu-toolchain/avr8-gnu-toolchain-win32_x86-hostlibs
--enable-win32-registry=avrtoolchain
--with-pkgversion=AVR_8_bit_GNU_Toolchain_3.5.0_1662
--with-bugurl=http://www.atmel.com
Thread model: single
gcc version 4.9.2 (AVR_8_bit_GNU_Toolchain_3.5.0_1662)
I'm writing code for AVR micro controller where every byte counts, so compile
time evaluation is key. I was trying out the new Atmel Studio 7 IDE which comes
with the new 4.9.2 gcc when I came across this problem. In my real world code
I'm using constexpr constructor and constexpr instances of my pin handler class
- to make life easier and encapsulate port, data direction and other registers.
Note: If I use pointer instead of reference then it compiles fine:
constexpr volatile unsigned char * testAddr(volatile unsigned char * x) {
return x;
}
constexpr volatile unsigned char* addr3 = testAddr(&PORTX); /// OK
Why is this? Am I doing something wrong? How can I use (port) references in
constexpr functions?
This also does NOT work:
constexpr volatile unsigned char& ref5 = PORTX; /// error
>From gcc-bugs-return-523056-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 01:17:35 2016
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Subject: [Bug tree-optimization/70775] New: ICE on valid code at -O3 on x86_64-linux-gnu: Segmentation fault
Date: Sun, 24 Apr 2016 01:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70775
Bug ID: 70775
Summary: ICE on valid code at -O3 on x86_64-linux-gnu:
Segmentation fault
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current gcc trunk at
-O3 on x86_64-linux-gnu in both 32-bit and 64-bit modes.
It is a regression from 5.3.x.
$ 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/7.0.0/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 7.0.0 20160423 (experimental) [trunk revision 235384] (GCC)
$
$ gcc-trunk -O2 -c small.c
$ gcc-5.3 -O3 -c small.c
$
$ gcc-trunk -O3 -c small.c
small.c: In function ‘fn2’:
small.c:17:1: internal compiler error: Segmentation fault
fn2 ()
^~~
0xb6718f crash_signal
../../gcc-source-trunk/gcc/toplev.c:333
0x74e89c vec_safe_length<loop*, va_gc>
../../gcc-source-trunk/gcc/vec.h:524
0x74e89c loop_depth
../../gcc-source-trunk/gcc/cfgloop.h:444
0x74e89c flow_loop_nested_p(loop const*, loop const*)
../../gcc-source-trunk/gcc/cfgloop.c:64
0xdb7837 vect_is_simple_reduction
../../gcc-source-trunk/gcc/tree-vect-loop.c:2627
0xdb9011 vect_force_simple_reduction
../../gcc-source-trunk/gcc/tree-vect-loop.c:3026
0xdb9011 vect_analyze_scalar_cycles_1
../../gcc-source-trunk/gcc/tree-vect-loop.c:865
0xdbc807 vect_analyze_scalar_cycles
../../gcc-source-trunk/gcc/tree-vect-loop.c:939
0xdbc807 vect_analyze_loop_2
../../gcc-source-trunk/gcc/tree-vect-loop.c:1845
0xdbc807 vect_analyze_loop(loop*)
../../gcc-source-trunk/gcc/tree-vect-loop.c:2264
0xdd7611 vectorize_loops()
../../gcc-source-trunk/gcc/tree-vectorizer.c:532
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.
$
$
------------------------------------------
struct S
{
int f1;
int f2;
} a;
int b, c, d, e;
short f;
int
fn1 (int p1, unsigned p2)
{
return p1 + p2;
}
void
fn2 ()
{
struct S g;
int h;
for (; c; c++)
for (f = -3; f < 3; f = fn1 (f, 8))
{
a.f1 = e;
if (b)
a = g;
else
for (; h; h++)
d = b;
}
}
>From gcc-bugs-return-523057-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 03:13:31 2016
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Subject: [Bug c++/70776] New: ICE on invalid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Sun, 24 Apr 2016 03:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70776
Bug ID: 70776
Summary: ICE on invalid code on x86_64-linux-gnu: Segmentation
fault (program cc1plus)
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk on
x86_64-linux-gnu in both 32-bit and 64-bit modes.
It seems to affect at least all GCC versions 4.4.x and later.
$ 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/7.0.0/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 7.0.0 20160423 (experimental) [trunk revision 235384] (GCC)
$
$ g++-trunk small.cpp -c
g++-trunk: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
$
----------------------------------------------------
template < int > struct A;
template < typename, typename = void > struct B;
template < typename T >
struct B < T, typename A < B < T >::value >::type >
{
B < int > b; // OK: B < int > *b;
};
>From gcc-bugs-return-523058-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 05:12:22 2016
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
Date: Sun, 24 Apr 2016 05:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70684
--- Comment #16 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Sun Apr 24 05:07:21 2016
New Revision: 235391
URL: https://gcc.gnu.org/viewcvs?rev=235391&root=gcc&view=rev
Log:
2016-04-23 Jerry DeLisle <jvdelisle@gcc.gnu.org>
PR libgfortran/70684
* io/list_read (check_buffers): Add '\r' to check for end of line.
factor.
* gfortran.dg/list_read_14.f90: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/list_read_14.f90
Modified:
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/libgfortran/ChangeLog
branches/gcc-6-branch/libgfortran/io/list_read.c
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Subject: [Bug c++/70774] constexpr function with reference parameter gives reinterpret_cast from integer to pointer error
Date: Sun, 24 Apr 2016 07:39:00 -0000
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
The correct place to ask such questions is <gcc-help@gcc.gnu.org>.
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From: "suckfish at ihug dot co.nz" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70777] New: x*x pessimised to pow(x,2) with -Og -ffast-math
Date: Sun, 24 Apr 2016 10:00:00 -0000
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Bug ID: 70777
Summary: x*x pessimised to pow(x,2) with -Og -ffast-math
Product: gcc
Version: 6.0
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Compiling the function
double foo(double x) { return x*x; }
on x86_64 with "gcc -Og -ffast-math" converts the multiplication to a call to
pow():
foo:
.LFB0:
.cfi_startproc
subq $8, %rsp
.cfi_def_cfa_offset 16
movsd .LC0(%rip), %xmm1
call pow
addq $8, %rsp
.cfi_def_cfa_offset 8
ret
Removing the -ffast-math or using -O/-O2/-O3 with -ffast-math, the
multiplication compiles to a multiply instruction.
Observed with gcc 4.8.3, 5.4.1 and 6.0.
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Subject: [Bug tree-optimization/70777] x*x pessimised to pow(x,2) with -Og -ffast-math
Date: Sun, 24 Apr 2016 11:52:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
fold-const.c:
/* Canonicalize x*x as pow(x,2.0), which is expanded as x*x. */
But this isn't quite true. pow is lowered to x*x in the sincos pass, which
doesn't run at -Og.
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Subject: [Bug libstdc++/70766] stream iterators, shared_lock, and atomic<T> should all use addressof and not &
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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Subject: [Bug c++/70769] function definition wrongfully allowed inside comma separated member declaration list
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>From gcc-bugs-return-523064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 14:02:43 2016
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Subject: [Bug fortran/70350] [5 Regression] ICE with -fcheck=all and array initialization
Date: Sun, 24 Apr 2016 14:02:00 -0000
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--- Comment #3 from janus at gcc dot gnu.org ---
Unfortunately this bug affects versions shipping with Debian and Ubuntu, e.g.
gcc version 5.3.1 20160413 (Ubuntu 5.3.1-14ubuntu2)
which is the version included in the lastest Ubuntu release 16.04. See also:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=819367
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Subject: [Bug fortran/70350] [5 Regression] ICE with -fcheck=all and array initialization
Date: Sun, 24 Apr 2016 14:09:00 -0000
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--- Comment #4 from janus at gcc dot gnu.org ---
Looks very related to PR 69385
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Subject: [Bug target/53557] Cross compiling for m68k-linux fails as <asm/unistd.h> doesn't exist
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #1 from Jeffrey A. Law <law at redhat dot com> ---
Fixed on the trunk a few days ago.
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Subject: [Bug middle-end/32667] block copy with exact overlap is expanded as memcpy
Date: Sun, 24 Apr 2016 14:39:00 -0000
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Alexander Cherepanov <ch3root at openwall dot com> changed:
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----------------------------------------------------------------------------
CC| |ch3root at openwall dot com
--- Comment #13 from Alexander Cherepanov <ch3root at openwall dot com> ---
This bug could be reproduced with gcc 7.0.0 20160424 on x86-64 with this
example:
int main()
{
volatile struct {
char s[8193]; // gcc
//char s[129]; // clang
} s = {""};
s = s;
}
>From gcc-bugs-return-523068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 15:57:29 2016
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Subject: [Bug middle-end/32667] block copy with exact overlap is expanded as memcpy
Date: Sun, 24 Apr 2016 15:57:00 -0000
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--- Comment #14 from Patrick J. LoPresti <lopresti at gmail dot com> ---
D Hugh Redelmeier in comment 12 is mistaken... memcpy is a reserved identifier
(see e.g. http://stackoverflow.com/a/23841970), so the user cannot legally
redefine it.
That said, this is clearly a real bug in GCC. memcpy has a well-defined
interface; GCC emits calls violating that interface; therefore GCC is buggy. I
do not see why this is even controversial. (Also see Julian Seward's
description of real-world problems in comment 5.)
GCC either needs to provide its own mempcy or it needs to respect the
interface. The cost of the latter is surely trivial, especially since many
cases could be optimized by alias analysis.
>From gcc-bugs-return-523069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 16:39:52 2016
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Subject: [Bug c++/70328] default generated destructors cause 'inlining failed' warnings.
Date: Sun, 24 Apr 2016 16:39:00 -0000
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Morwenn <morwenn29 at hotmail dot fr> changed:
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----------------------------------------------------------------------------
CC| |morwenn29 at hotmail dot fr
--- Comment #1 from Morwenn <morwenn29 at hotmail dot fr> ---
I have the same problem from time to time (g++ 5.3). It generally happens when
I am deep in the function call stack. The symptoms are the same and the
resolution is the same. To be honest, since there is nowhere in my project any
request to force inlining anywhere, this -Winline diagnostic for automatically
generated destructors feels a bit bogus.
>From gcc-bugs-return-523071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 18:07:59 2016
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Subject: [Bug libstdc++/70762] FAIL: experimental/filesystem/operations/copy.cc execution test on x86_64-apple-darwin1*
Date: Sun, 24 Apr 2016 18:07:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Should be fixed at r235395
>From gcc-bugs-return-523070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 18:07:42 2016
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Subject: [Bug libstdc++/70762] FAIL: experimental/filesystem/operations/copy.cc execution test on x86_64-apple-darwin1*
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Sun Apr 24 18:06:54 2016
New Revision: 235395
URL: https://gcc.gnu.org/viewcvs?rev=235395&root=gcc&view=rev
Log:
libstdc++/70762 fix fallback implementation of nonexistent_path
PR libstdc++/70762
* testsuite/util/testsuite_fs.h (__gnu_test::nonexistent_path): Use
static counter to return a different path on every call.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/testsuite/util/testsuite_fs.h
>From gcc-bugs-return-523072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 18:14:30 2016
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Subject: [Bug c++/70776] [4.9/5/6/7 Regression] ICE on invalid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Sun, 24 Apr 2016 18:14:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |4.9.4
Summary|ICE on invalid code on |[4.9/5/6/7 Regression] ICE
|x86_64-linux-gnu: |on invalid code on
|Segmentation fault (program |x86_64-linux-gnu:
|cc1plus) |Segmentation fault (program
| |cc1plus)
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
r72500 compiles this fine (but doesn't reject), r75000 already ICEs; don't have
bisect stuff for this old revisions in between.
>From gcc-bugs-return-523073-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 18:34:13 2016
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Subject: [Bug c/67784] Incorrect parsing when using declarations in for loops and typedefs
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Jacques-Henri Jourdan <jacques-henri.jourdan at inria dot Fr> changed:
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----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #9 from Jacques-Henri Jourdan <jacques-henri.jourdan at inria dot Fr> ---
I am sorry, but it appears a similar bug is still in the 6.1 RC, with the
following variant of my first example:
typedef int T;
void f(void) {
if(sizeof(enum { T }) == 0);
T x; // T should be resolved outside of the scope of "if"
x = 0;
}
>From gcc-bugs-return-523074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 18:54:31 2016
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Subject: [Bug middle-end/70765] GCC fails to detect possibly uninitialized variable
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Why do you think that is a bug? GCC is not a static analyzer, but a compiler,
and to detect this case the functions need to be inlined, which is an
optimization that is not performed at -O0 (unless the function is inline
__attribute__((always_inline)) ).
>From gcc-bugs-return-523075-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 20:27:12 2016
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Subject: [Bug c++/70778] New: internal compiler error: in tsubst, at cp/pt.c:12158
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Bug ID: 70778
Summary: internal compiler error: in tsubst, at cp/pt.c:12158
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Component: c++
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Reporter: bastien.penavayre at epitech dot eu
Target Milestone: ---
Created attachment 38335
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38335&action=edit
file compiled with -v -save-temps
When compiled the given file result in this error :
test.cpp: In function ‘int main()’:
test.cpp:20:62: internal compiler error: in tsubst, at cp/pt.c:12158
using result = Stuff<unsigned>::AddToFront<0, Holder<24>>::type;
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
>From gcc-bugs-return-523076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 20:29:15 2016
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Subject: [Bug c++/70778] internal compiler error: in tsubst, at cp/pt.c:12158
Date: Sun, 24 Apr 2016 20:29:00 -0000
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--- Comment #1 from bastien penavayre <bastien.penavayre at epitech dot eu> ---
Created attachment 38336
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38336&action=edit
full output of -v -save-temps
>From gcc-bugs-return-523077-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 20:32:35 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70771] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in operator[], at vec.h:714
Date: Sun, 24 Apr 2016 20:32:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-24
CC| |jakub at gcc dot gnu.org
Version|6.0 |7.0
Target Milestone|--- |7.0
Summary|ICE on valid code at -O3 on |[7 Regression] ICE on valid
|x86_64-linux-gnu in |code at -O3 on
|operator[], at vec.h:714 |x86_64-linux-gnu in
| |operator[], at vec.h:714
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r235292.
>From gcc-bugs-return-523078-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 20:33:38 2016
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Subject: [Bug tree-optimization/70775] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: Segmentation fault
Date: Sun, 24 Apr 2016 20:33:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-24
CC| |jakub at gcc dot gnu.org
Version|6.0 |7.0
Target Milestone|--- |7.0
Summary|ICE on valid code at -O3 on |[7 Regression] ICE on valid
|x86_64-linux-gnu: |code at -O3 on
|Segmentation fault |x86_64-linux-gnu:
| |Segmentation fault
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r235292.
>From gcc-bugs-return-523079-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 21:44:59 2016
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Subject: [Bug gcov-profile/70773] Profiling makes sudoku solver slower
Date: Sun, 24 Apr 2016 21:44:00 -0000
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--- Comment #1 from PeteVine <tulipawn at gmail dot com> ---
Created attachment 38337
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38337&action=edit
the two assembly versions
>From gcc-bugs-return-523080-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 21:52:02 2016
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70773] Profiling makes sudoku solver slower
Date: Sun, 24 Apr 2016 21:52:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Looks like for some reason with profiling __aeabi_idiv/__aeabi_idivmod is being
used in one place.
Most likely for pos / 9 .
>From gcc-bugs-return-523081-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 22:18:17 2016
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Subject: [Bug middle-end/70773] Profiling makes sudoku solver slower
Date: Sun, 24 Apr 2016 22:18:00 -0000
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--- Comment #3 from PeteVine <tulipawn at gmail dot com> ---
Oh, a divmod issue. At least it's not using modsi3 ;) (llvm #26450)
BTW, the attached assembly files were generated with lto and NEON enabled but
the 20% difference stayed the same. (1s vs 1.2s)
>From gcc-bugs-return-523082-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 22:22:29 2016
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Subject: [Bug target/19204] [m68k] pea can force reloads that cause inefficient code
Date: Sun, 24 Apr 2016 22:22:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Jeffrey A. Law <law at redhat dot com> ---
A bug like this without a testcase is pointless. Even more so when it's
specific to a dead target.
Andreas may not like closing, but it's the right thing to do. Obviously if
someone comes up with a testcase, then a new bug can be opened and handled
appropriately.
>From gcc-bugs-return-523083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Apr 24 22:23:28 2016
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Subject: [Bug target/19205] [m68k] avoid converting INDEX to SI mode if a narrower mode suffices
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #8 from Jeffrey A. Law <law at redhat dot com> ---
A bug like this without a testcase is pointless. Even more so when it's
specific to a dead target.
Andreas may not like closing, but it's the right thing to do. Obviously if
someone comes up with a testcase, then a new bug can be opened and handled
appropriately.
>From gcc-bugs-return-523084-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 02:25:32 2016
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Subject: [Bug c/70779] New: -trapv does not generate trapping vode for integer conversions
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Bug ID: 70779
Summary: -trapv does not generate trapping vode for integer
conversions
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: igodard at pacbell dot net
Target Milestone: ---
This source:
extern int si; extern unsigned ui;
int main(int argc, char** argv) {
return argc==0?si:ui; }
compiled with this command line:
gcc -S -O3 -ftrapv src/test2.c
gets this code:
main:
.LFB0:
.cfi_startproc
testl %edi, %edi
movl ui(%rip), %eax
cmove si(%rip), %eax
ret
.cfi_endproc
Note that there is no check for overflow.
>From gcc-bugs-return-523085-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 02:50:30 2016
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Subject: [Bug tree-optimization/70780] New: wrong code at -O2 and -O3 on x86_64-linux-gnu
Date: Mon, 25 Apr 2016 02:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70780
Bug ID: 70780
Summary: wrong code at -O2 and -O3 on x86_64-linux-gnu
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The current gcc trunk miscompiles the following code on x86_64-linux-gnu at -O2
and -O3 in both 32-bit and 64-bit modes.
This is a regression from 5.3.x.
$ 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/7.0.0/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 7.0.0 20160424 (experimental) [trunk revision 235394] (GCC)
$
$ gcc-trunk -Os small.c; ./a.out
$ gcc-5.3 -O2 small.c; ./a.out
$
$ gcc-trunk -O2 small.c
$ ./a.out
Segmentation fault (core dumped)
$
--------------------------------
int a, b, c, *d, e;
static int
fn1 ()
{
if (a)
goto l1;
l2: while (b)
if (*d)
return c;
for (e = 0; e; e++)
{
goto l2;
l1:;
}
return 0;
}
int
main ()
{
fn1 ();
return 0;
}
>From gcc-bugs-return-523086-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 03:04:43 2016
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From: "dje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Mon, 25 Apr 2016 03:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70704
--- Comment #43 from David Edelsohn <dje at gcc dot gnu.org> ---
I tried RC2 and it again failed. I configured again with your configure
command and what appears to be your build command, and it succeeded.
One difference is my normal bootstrap script still use the contrib/gcc_build
shell script, which invokes "make -jX bootstrap". I am testing if the
"bootstrap" target specifically elicits the comparison failure.
>From gcc-bugs-return-523087-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 03:14:20 2016
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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++/70781] New: ICE on invalid C++ code with lambda expressions on x86_64-linux-gnu in finish_expr_stmt, at cp/semantics.c:677
Date: Mon, 25 Apr 2016 03:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70781
Bug ID: 70781
Summary: ICE on invalid C++ code with lambda expressions on
x86_64-linux-gnu in finish_expr_stmt, at
cp/semantics.c:677
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current GCC trunk on
x86_64-linux-gnu in both 32-bit and 64-bit modes.
It is a regression from 5.3.x.
$ 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/7.0.0/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 7.0.0 20160424 (experimental) [trunk revision 235394] (GCC)
$
$ g++-5.3 -c small.cpp -std=c++11
small.cpp: In function ‘void foo()’:
small.cpp:5:5: error: expected primary-expression before ‘(’ token
T ([=] (S) { [=] {}; });
^
small.cpp:5:11: error: ‘S’ has not been declared
T ([=] (S) { [=] {}; });
^
$ g++-trunk -c small.cpp -std=c++11
small.cpp: In lambda function:
small.cpp:5:22: internal compiler error: in finish_expr_stmt, at
cp/semantics.c:677
T ([=] (S) { [=] {}; });
^
0x7b4c50 finish_expr_stmt(tree_node*)
../../gcc-source-trunk/gcc/cp/semantics.c:677
0x745722 cp_parser_expression_statement
../../gcc-source-trunk/gcc/cp/parser.c:10720
0x73343b cp_parser_statement
../../gcc-source-trunk/gcc/cp/parser.c:10534
0x7340ec cp_parser_statement_seq_opt
../../gcc-source-trunk/gcc/cp/parser.c:10806
0x734bde cp_parser_lambda_body
../../gcc-source-trunk/gcc/cp/parser.c:10272
0x734bde cp_parser_lambda_expression
../../gcc-source-trunk/gcc/cp/parser.c:9756
0x735d8c cp_parser_primary_expression
../../gcc-source-trunk/gcc/cp/parser.c:4933
0x737e16 cp_parser_postfix_expression
../../gcc-source-trunk/gcc/cp/parser.c:6690
0x740f3c cp_parser_unary_expression
../../gcc-source-trunk/gcc/cp/parser.c:7988
0x741797 cp_parser_cast_expression
../../gcc-source-trunk/gcc/cp/parser.c:8665
0x741d95 cp_parser_binary_expression
../../gcc-source-trunk/gcc/cp/parser.c:8767
0x742680 cp_parser_assignment_expression
../../gcc-source-trunk/gcc/cp/parser.c:9055
0x7441c6 cp_parser_parenthesized_expression_list
../../gcc-source-trunk/gcc/cp/parser.c:7459
0x744c31 cp_parser_functional_cast
../../gcc-source-trunk/gcc/cp/parser.c:25943
0x737d0a cp_parser_postfix_expression
../../gcc-source-trunk/gcc/cp/parser.c:6615
0x740f3c cp_parser_unary_expression
../../gcc-source-trunk/gcc/cp/parser.c:7988
0x741797 cp_parser_cast_expression
../../gcc-source-trunk/gcc/cp/parser.c:8665
0x741d95 cp_parser_binary_expression
../../gcc-source-trunk/gcc/cp/parser.c:8767
0x742680 cp_parser_assignment_expression
../../gcc-source-trunk/gcc/cp/parser.c:9055
0x744f59 cp_parser_expression
../../gcc-source-trunk/gcc/cp/parser.c:9222
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.
$
---------------------------------------------
template < typename T >
// OK: template < typename T, typename S >
void foo ()
{
T ([=] (S) { [=] {}; });
}
>From gcc-bugs-return-523088-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 04:18:46 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70782] New: zero-initialized union returned by value generates useless stores/loads to the stack
Date: Mon, 25 Apr 2016 04:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70782
Bug ID: 70782
Summary: zero-initialized union returned by value generates
useless stores/loads to the stack
Product: gcc
Version: 5.2.1
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: jhaberman at gmail dot com
Target Milestone: ---
Test case:
--
#include <string.h>
typedef union {
char ch;
float fl;
double dbl;
} u;
u f(const void *p, int type) {
u v;
memset(&v, 0, 8);
if (type == 1) {
memcpy(&v, p, 1);
} else if (type <= 5) {
memcpy(&v, p, 4);
} else if (type <= 8) {
memcpy(&v, p, 8);
}
return v;
}
--
With gcc 5.2.1 on Ubuntu, compiled with -O3 -fno-stack-protect I get:
--
0000000000000000 <f>:
0: 83 fe 01 cmp esi,0x1
3: 48 c7 44 24 e8 00 00 mov QWORD PTR [rsp-0x18],0x0
a: 00 00
c: 74 32 je 40 <f+0x40>
e: 83 fe 05 cmp esi,0x5
11: 7e 1d jle 30 <f+0x30>
13: 83 fe 08 cmp esi,0x8
16: 7f 08 jg 20 <f+0x20>
18: 48 8b 07 mov rax,QWORD PTR [rdi]
1b: 48 89 44 24 e8 mov QWORD PTR [rsp-0x18],rax
20: 48 8b 44 24 e8 mov rax,QWORD PTR [rsp-0x18]
25: c3 ret
26: 66 2e 0f 1f 84 00 00 nop WORD PTR cs:[rax+rax*1+0x0]
2d: 00 00 00
30: 8b 07 mov eax,DWORD PTR [rdi]
32: 89 44 24 e8 mov DWORD PTR [rsp-0x18],eax
36: 48 8b 44 24 e8 mov rax,QWORD PTR [rsp-0x18]
3b: c3 ret
3c: 0f 1f 40 00 nop DWORD PTR [rax+0x0]
40: 0f b6 07 movzx eax,BYTE PTR [rdi]
43: 88 44 24 e8 mov BYTE PTR [rsp-0x18],al
47: 48 8b 44 24 e8 mov rax,QWORD PTR [rsp-0x18]
4c: c3 ret
--
In every code path it saves the read value to the stack, only to read it back.
None of these operations are actually necessary, since the code is already
zeroing the other parts of rax. This function shouldn't need to use any stack
space at all.
>From gcc-bugs-return-523089-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 04:35:12 2016
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From: "jhaberman at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70782] zero-initialized long returned by value generates useless stores/loads to the stack
Date: Mon, 25 Apr 2016 04:35:00 -0000
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Josh Haberman <jhaberman at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|zero-initialized union |zero-initialized long
|returned by value generates |returned by value generates
|useless stores/loads to the |useless stores/loads to the
|stack |stack
--- Comment #1 from Josh Haberman <jhaberman at gmail dot com> ---
I just realized that the union has nothing to do with it. I get exactly the
same results if the function returns a long:
--
#include <string.h>
long f(const void *p, int type) {
long v;
memset(&v, 0, 8);
if (type == 1) {
memcpy(&v, p, 1);
} else if (type <= 5) {
memcpy(&v, p, 4);
} else if (type <= 8) {
memcpy(&v, p, 8);
}
return v;
}
--
I've retitled the bug accordingly.
>From gcc-bugs-return-523090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 07:07:59 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70780] [6/7 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
Date: Mon, 25 Apr 2016 07:07:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-25
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|wrong code at -O2 and -O3 |[6/7 Regression] wrong code
|on x86_64-linux-gnu |at -O2 and -O3 on
| |x86_64-linux-gnu
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r234970.
>From gcc-bugs-return-523091-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 07:11:52 2016
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Subject: [Bug c++/70781] [6/7 Regression] ICE on invalid C++ code with lambda expressions on x86_64-linux-gnu in finish_expr_stmt, at cp/semantics.c:677
Date: Mon, 25 Apr 2016 07:11:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-25
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Target Milestone|--- |6.0
Summary|ICE on invalid C++ code |[6/7 Regression] ICE on
|with lambda expressions on |invalid C++ code with
|x86_64-linux-gnu in |lambda expressions on
|finish_expr_stmt, at |x86_64-linux-gnu in
|cp/semantics.c:677 |finish_expr_stmt, at
| |cp/semantics.c:677
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r233183.
>From gcc-bugs-return-523092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 07:39:20 2016
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Subject: [Bug tree-optimization/70780] [6/7 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
Date: Mon, 25 Apr 2016 07:39:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems starting with that revision we hoist *d before the loop (which would be
ok only if it is guarded by if (b), as if b is false, it is completely valid
that d is NULL or uninitialized etc. and causes trap).
Richard, can you please have a look?
>From gcc-bugs-return-523093-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 07:46:44 2016
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Subject: [Bug target/70763] Use SSE for DImode load/store
Date: Mon, 25 Apr 2016 07:46:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Severity|normal |enhancement
>From gcc-bugs-return-523094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 07:48:34 2016
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Subject: [Bug c++/70768] [6/7 Regression] Increased compilation time
Date: Mon, 25 Apr 2016 07:48:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |compile-time-hog,
| |memory-hog
Status|RESOLVED |REOPENED
Last reconfirmed| |2016-04-25
Resolution|INVALID |---
Target Milestone|--- |6.2
Summary|Increased compilation time |[6/7 Regression] Increased
| |compilation time
Ever confirmed|0 |1
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think this kind of memory usage increase is a bug.
>From gcc-bugs-return-523095-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 07:49:49 2016
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Subject: [Bug tree-optimization/70771] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in operator[], at vec.h:714
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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>From gcc-bugs-return-523096-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 07:50:23 2016
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Subject: [Bug c/70772] Wrong warning about unspecified behavior for comparison with string literal
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-25
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-523097-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 07:51:14 2016
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Subject: [Bug middle-end/70773] Profiling makes sudoku solver slower
Date: Mon, 25 Apr 2016 07:51:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
It possibly does value profiling figuring out a common division/modulo value
and then making all other values unlikely (and thus cold).
>From gcc-bugs-return-523098-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 07:52:47 2016
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Subject: [Bug tree-optimization/70775] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: Segmentation fault
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
CC| |amker at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Probably a latent issue.
>From gcc-bugs-return-523099-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 07:56:04 2016
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Subject: [Bug c++/70776] [4.9/5/6/7 Regression] ICE on invalid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-25
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Infinite recursion via
#0 0x0000000000b0051e in ggc_internal_alloc (
size=<error reading variable: Cannot access memory at address
0x7ffffbffeed8>, f=<error reading variable: Cannot access memory at address
0x7ffffbffeed0>,
s=<error reading variable: Cannot access memory at address 0x7ffffbffeec8>,
n=<error reading variable: Cannot access memory at address 0x7ffffbffeec0>)
at /space/rguenther/src/svn/trunk/gcc/ggc-page.c:1267
#1 0x0000000000d3e569 in ggc_internal_cleared_alloc (size=40, f=0x0, s=0, n=1)
at /space/rguenther/src/svn/trunk/gcc/ggc-common.c:116
#2 0x00000000013e9456 in ggc_internal_cleared_alloc (s=40)
at /space/rguenther/src/svn/trunk/gcc/ggc.h:148
#3 0x00000000013e948a in ggc_alloc_cleared_tree_node_stat (s=40)
at /space/rguenther/src/svn/trunk/gcc/ggc.h:292
#4 0x00000000013ef8c2 in make_tree_vec_stat (len=2)
at /space/rguenther/src/svn/trunk/gcc/tree.c:2281
#5 0x000000000081467f in coerce_template_parms (
parms=<tree_vec 0x7ffff69da758>, args=<tree_vec 0x7ffff67ee438>,
in_decl=<template_decl 0x7ffff69f1100 B>, complain=0,
require_all_args=true, use_default_args=true)
at /space/rguenther/src/svn/trunk/gcc/cp/pt.c:7594
#6 0x00000000008151a1 in coerce_innermost_template_parms (
parms=<tree_list 0x7ffff69da780>, args=<tree_vec 0x7ffff67ee438>,
in_decl=<template_decl 0x7ffff69f1100 B>, complain=0,
require_all_args=true, use_default_args=true)
at /space/rguenther/src/svn/trunk/gcc/cp/pt.c:7820
#7 0x0000000000817ceb in lookup_template_class_1 (
d1=<identifier_node 0x7ffff69efd68 B>, arglist=<tree_vec 0x7ffff67ee438>,
in_decl=<tree 0x0>, context=<translation_unit_decl 0x7ffff6893168>,
entering_scope=0, complain=0)
at /space/rguenther/src/svn/trunk/gcc/cp/pt.c:8297
#8 0x000000000081ae6b in lookup_template_class (
d1=<record_type 0x7ffff69df7e0 B>, arglist=<tree_vec 0x7ffff67ee438>,
in_decl=<tree 0x0>, context=<translation_unit_decl 0x7ffff6893168>,
entering_scope=0, complain=0)
at /space/rguenther/src/svn/trunk/gcc/cp/pt.c:8638
#9 0x00000000008274a3 in tsubst_aggr_type (t=<record_type 0x7ffff69df7e0 B>,
args=<tree_vec 0x7ffff67ef040>, complain=0, in_decl=<tree 0x0>,
entering_scope=0) at /space/rguenther/src/svn/trunk/gcc/cp/pt.c:11425
#10 0x000000000082fe5d in tsubst (t=<record_type 0x7ffff69df7e0 B>,
args=<tree_vec 0x7ffff67ef040>, complain=0, in_decl=<tree 0x0>)
at /space/rguenther/src/svn/trunk/gcc/cp/pt.c:12895
#11 0x0000000000833e7d in tsubst_qualified_id (
qualified_id=<scope_ref 0x7ffff69daac8>, args=<tree_vec 0x7ffff67ef040>,
complain=0, in_decl=<tree 0x0>, done=true, address_p=false)
at /space/rguenther/src/svn/trunk/gcc/cp/pt.c:13734
...
Clang detects:
> clang++ -S t.ii
t.ii:6:34: fatal error: recursive template instantiation exceeded maximum depth
of 256
Not sure if the testcase is thus invalid (but we should diagnose it instead
of crashing).
>From gcc-bugs-return-523100-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 07:59:14 2016
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Subject: [Bug tree-optimization/70777] x*x pessimised to pow(x,2) with -Og -ffast-math
Date: Mon, 25 Apr 2016 07:59:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine. We should remove the canonicalization done in fold as reassoc does it
now
(and better). Probably not going to be fixed for older releases (though
we could gate the transform appropriately).
>From gcc-bugs-return-523101-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 08:01:01 2016
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Subject: [Bug c++/70778] internal compiler error: in tsubst, at cp/pt.c:12158
Date: Mon, 25 Apr 2016 08:01:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-25
Ever confirmed|0 |1
Known to fail| |4.8.5, 7.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed on trunk.
>From gcc-bugs-return-523102-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 08:02:20 2016
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Subject: [Bug c/70779] -trapv does not generate trapping vode for integer conversions
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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> ---
conversions from unsigned to signed are not undefined but implementation
defined
and not covered by -ftrapv. Instead GCC documents its implementation defined
behavior as modulo-2 reduction.
>From gcc-bugs-return-523103-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 08:03:59 2016
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Subject: [Bug tree-optimization/70777] x*x pessimised to pow(x,2) with -Og -ffast-math
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Well, we could also optimize pow (x, 2) to x * x at expansion time.
>From gcc-bugs-return-523104-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 08:06:56 2016
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Subject: [Bug tree-optimization/70780] [6/7 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Will have a look.
>From gcc-bugs-return-523105-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 08:16:09 2016
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Subject: [Bug tree-optimization/70777] x*x pessimised to pow(x,2) with -Og -ffast-math
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 25 Apr 2016, jakub at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70777
>
> Jakub Jelinek <jakub at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |jakub at gcc dot gnu.org
>
> --- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
> Well, we could also optimize pow (x, 2) to x * x at expansion time.
We did in the past but removed that "feature". We could also
canonicalize to POWI instead (not losing the fact x * x didn't set
errno, etc.).
>From gcc-bugs-return-523106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 08:22:13 2016
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Subject: [Bug debug/70764] PASS->FAIL: gcc.dg/guality/pr41447-1.c -O2 -flto -fno-use-linker-plugin -flto-partition=none
Date: Mon, 25 Apr 2016 08:22:00 -0000
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--- Comment #3 from Nick Clifton <nickc at gcc dot gnu.org> ---
Hi Kyrylo,
> FAIL: tmp is -1, not 0
> FAIL: tmp2 is -1, not 0
> FAIL: gcc.dg/guality/pr41447-1.c -O2 -flto -fno-use-linker-plugin
> -flto-partition=none execution test
Would you mind uploading this binary so that I can have a look at it ?
> There are optimisation levels where the test passes though.
> For example:
> PASS: gcc.dg/guality/pr41447-1.c -O2 -flto -fuse-linker-plugin
> -fno-fat-lto-objects.
Could you upload this one too, so that I can compare it ?
> Perhaps we should XFAIL the test for aarch64?
Not yet - we need to know why the test is failing for the aarch64.
Cheers
Nick
>From gcc-bugs-return-523107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 08:38:56 2016
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Subject: [Bug tree-optimization/70780] [6/7 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, so we now find (properly) that *d is loop invariant in while (b) but fail
to detect *d as possibly trapping. That is supposed to be prevented (in PRE)
by the loop exit but I messed up iteration and thus the solution we use for
insertion is not final.
>From gcc-bugs-return-523108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 09:13:15 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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----------------------------------------------------------------------------
CC| |michael.haubenwallner@ssi-s
| |chaefer.com
--- Comment #44 from Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com> ---
Created attachment 38338
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38338&action=edit
FLEX listens to M4 envvar, unset.
Does it help to set M4=/opt/freeware/bin/m4 in the environment, so configure is
forced to take GNU m4?
Once upon a time, I've had similar problems here, although with older gcc, and
use attached patch to fix it - maybe it is of some help here as well.
Problem is that flex does listen to the M4 environment variable. Dependent on
PATH, configure may find AIX m4 (/usr/bin) or GNU m4 (/opt/freeware/bin).
When M4=AIX-m4, flex-generated code breaks.
>From gcc-bugs-return-523109-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 09:15:46 2016
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Subject: [Bug tree-optimization/70771] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in operator[], at vec.h:714
Date: Mon, 25 Apr 2016 09:15:00 -0000
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--- Comment #2 from amker at gcc dot gnu.org ---
Also like PR70775, this case failed the change allows single argument PHIs in
if-cvt now. It looks like there is something wrong when handling single
argument PHIs. Before the change, we simple return false in
ifcvt_convertible_phi_p and skip if-conversion for such form loops.
>From gcc-bugs-return-523110-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 09:21:45 2016
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From: "andreas.g.jhoss at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug driver/70783] New: -spec option behavior is different to implicit spec file
Date: Mon, 25 Apr 2016 09:21:00 -0000
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Bug ID: 70783
Summary: -spec option behavior is different to implicit spec
file
Product: gcc
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The failing specs file
I can verify that easily on every Linux system with native compiler
Anyway I am using a gcc backcross compiler (Linux->Windows-Linux) with one
substitute rule.
Is this a lack of documentation or a bug ?
I put a spec file in /usr/lib/gcc/i686-pc-linux-gnu/4.8.5/specs or wherever the
specfile is searched and add a substitute rule (See attached file)
But the substitue rule is only recognized if I do the gcc call with option
-specs=....
Working :
g++ r:\test.cpp -nojhdefaultlibs -o r:\test
-specs=q:/gnuwinh5/bin/../lib/gcc/i686-pc-linux-gnu/4.8.5/
Reading specs from q:/gnuwinh5/bin/../lib/gcc/i686-pc-linux-gnu/4.8.5/specs
Reading specs from q:/gnuwinh5/bin/../lib/gcc/i686-pc-linux-gnu/4.8.5/specs
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=q:/gnuwinh5/bin/../libexec/gcc/i686-pc-linux-gnu/4.8.5/lto-wrapper.exe
Target: i686-pc-linux-gnu
......
Not Working :
If am using the implicit specs file with same path but option is not
recognized.
Reading specs from q:/gnuwinh5/bin/../lib/gcc/i686-pc-linux-gnu/4.8.5/specs
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=q:/gnuwinh5/bin/../libexec/gcc/i686-pc-linux-gnu/4.8.5/lto-wrapper.exe
g++: error: unrecognized command line option '-nojhdefaultlibs'
Target: i686-pc-linux-gnu
......
It doesn't matter what substitute rule I define and also where I define it
makes no difference
>From gcc-bugs-return-523111-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 09:28:16 2016
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Subject: [Bug rtl-optimization/70784] New: Merge multiple short stores of immediates into wider stores
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Consider the code:
struct bar {
int a;
char b;
char c;
char d;
char e;
char f;
char g;
}; // packed 64-bit structure
void
foozero (struct bar *p)
{
p->b = 0;
p->a = 0;
p->c = 0;
p->d = 0;
p->e = 0;
}
On aarch64 we currently generate:
foozero:
str wzr, [x0]
strb wzr, [x0, 4]
strb wzr, [x0, 5]
strb wzr, [x0, 6]
strb wzr, [x0, 7]
ret
But could generate a single 64-bit store:
foozero:
str xzr, [x0]
ret
Also, for:
void
foo (struct bar *p)
{
p->b = 0;
p->a = 0;
p->c = 0;
p->d = 1;
p->e = 0;
}
we could generate:
foo:
mov x1, #0x1000000000000
str x1, [x0]
Other targets could benefit from this too.
x86_64 currently generates for 'foo':
foo:
.LFB0:
.cfi_startproc
movl $0, (%rdi)
movb $0, 4(%rdi)
movb $0, 5(%rdi)
movb $1, 6(%rdi)
movb $0, 7(%rdi)
ret
but could genereate:
foo:
.LFB0:
.cfi_startproc
movabsq $281474976710656, %rax
movq %rax, (%rdi)
ret
>From gcc-bugs-return-523112-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 09:30:35 2016
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Subject: [Bug rtl-optimization/70784] Merge multiple short stores of immediates into wider stores
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-25
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Ever confirmed|0 |1
--- Comment #1 from ktkachov at gcc dot gnu.org ---
I have an idea to implement this at the RTL level by finding consecutive stores
of immediates, creating a byte vector resulting from the merged immediate
values, and re-emitting it using a new wider (and shorter) sequence.
>From gcc-bugs-return-523113-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 09:41:56 2016
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Subject: [Bug rtl-optimization/70784] Merge multiple short stores of immediates into wider stores
Date: Mon, 25 Apr 2016 09:41:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Please see PR22141 which even had a RTL implementation (in the DSE pass).
I think it would be much better handling this (together with bitfields) in some
late GIMPLE pass as opposed to RTL pass.
And note that using movabsq instead of two movls on x86_64 is very likely a
pessimization as opposed to optimization, so one needs to watch the costs too.
>From gcc-bugs-return-523114-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 09:43:51 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70784] Merge multiple short stores of immediates into wider stores
Date: Mon, 25 Apr 2016 09:43:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Also note that finding the heuristics when to use this (for -Os it is of course
clearer) is hard, if the pointer is sufficiently aligned or if the target is
strict alignment it is of course easier. And the RTL DSE patch caused some
SPEC regressions on powerpc*.
>From gcc-bugs-return-523115-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 09:44:33 2016
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Subject: [Bug libstdc++/70767] std::numeric_limits<const unsigned char>::digits is wrong unless --std=c++11 used
Date: Mon, 25 Apr 2016 09:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70767
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-25
Component|c++ |libstdc++
Target Milestone|--- |7.0
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Marc Glisse from comment #1)
> http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#559
> It has status CD1, I don't remember if that means it applies retroactively
> or not.
LWG is less consistent than CWG about stating which issue resolutions are
considered DRs, and so apply retroactively. The libstdc++ policy is to treat
most of them as applying retroactively anyway, because that's the most useful
approach.
Although our current behaviour is correct according to C++98, I see no reason
not to define the specializations for cv-qualified types in C++98.
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70784] Merge multiple short stores of immediates into wider stores
Date: Mon, 25 Apr 2016 10:18:00 -0000
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--- Comment #4 from ktkachov at gcc dot gnu.org ---
(In reply to Jakub Jelinek from comment #3)
> Also note that finding the heuristics when to use this (for -Os it is of
> course clearer) is hard, if the pointer is sufficiently aligned or if the
> target is strict alignment it is of course easier. And the RTL DSE patch
> caused some SPEC regressions on powerpc*.
Thanks for pointing me to PR22141.
I was hoping to structure this in such a way as to pass down the merged byte
sequence to a target hook together with information about the original
store+setup sequence and have the target emit the most profitable sequence
using any target-specific knowledge and tricks it may have (like prefer two
movls isntead of movabsq in your example above). We could provide some helper
functions for extracting immediates from the byte vector (like dse_decode_int
in your patch or a wrapper around builtin_strncpy_read_str from builtins.c).
The default implementation of the hook would be a conservative sequence that
emits a sequence of stores up to word_mode in width (avoiding unaligned stores
for STRICT_ALIGN or SLOW_UNALIGNED_ACCESS targets), perhaps reusing some
store_by_pieces infrastructure.
For the heuristics question I've found tracking setup instructions as well as
stores to work well. That is, from the original store sequence keep track not
only of the store insns but also the instructions that move immediates into the
registers to be stored. And the new sequence would be rejected if the total
number of stores is not smaller, or if the total store+setup cost is higher
than the old store+setup cost. Of course, that would depend on the backend
estimating the cost of synthesising immediates, which the aarch64 target (at
least) does.
I think a gimple implementation of this would suffer from such a drawback, in
that it would not know whether the new wider immediates are actually profitable
unless it consulted RTX costs, which we wouldn't want at gimple level.
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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/70784] Merge multiple short stores of immediates into wider stores
Date: Mon, 25 Apr 2016 10:44:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |DUPLICATE
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Dup.
Note we already have two passes that can do related transforms.
1) bswap which can detect adjacent loads (that then feed a (non-)bswap
sequence to build a larger value)
2) basic-block vectorization (which does not consider (all) non-vector
types for BLKmode vectorization)
2) has the additional limitation to only consider same-sized sub-stores so
doing this in the general framework of 1) may be easier.
Adding a new pass only considering adjacent stores may also be possible.
*** This bug has been marked as a duplicate of bug 22141 ***
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Subject: [Bug middle-end/22141] [4.9/5/6/7 Regression] Missing optimization when storing structures
Date: Mon, 25 Apr 2016 10:45:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |ktkachov at gcc dot gnu.org
--- Comment #34 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 70784 has been marked as a duplicate of this bug. ***
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Subject: [Bug tree-optimization/70780] [6/7 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
Date: Mon, 25 Apr 2016 10:50:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 25 10:49:55 2016
New Revision: 235407
URL: https://gcc.gnu.org/viewcvs?rev=235407&root=gcc&view=rev
Log:
2016-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/70780
* tree-ssa-pre.c (compute_antic_aux): Also return true if the block
wasn't visited yet.
(compute_antic): Mark blocks with abnormal preds as visited as
they have a final empty antic-in solution already.
* gcc.dg/torture/pr70780.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70780.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-pre.c
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Subject: [Bug tree-optimization/70780] [6/7 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/70780] [6/7 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu
Date: Mon, 25 Apr 2016 10:51:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Apr 25 10:50:46 2016
New Revision: 235408
URL: https://gcc.gnu.org/viewcvs?rev=235408&root=gcc&view=rev
Log:
2016-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/70780
* tree-ssa-pre.c (compute_antic_aux): Also return true if the block
wasn't visited yet.
(compute_antic): Mark blocks with abnormal preds as visited as
they have a final empty antic-in solution already.
* gcc.dg/torture/pr70780.c: New testcase.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr70780.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-pre.c
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Subject: [Bug tree-optimization/70771] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in operator[], at vec.h:714
Date: Mon, 25 Apr 2016 11:20:00 -0000
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--- Comment #3 from amker at gcc dot gnu.org ---
Had patch for this and PR70775, will send for review after testing.
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
First DCE after IPA PTA does
@@ -18217,7 +9762,6 @@
MEM[(struct ParameterDescription
*)_5].D.481734.D.343802._vptr.ParameterDescriptionNode = &MEM[(void
*)&_ZTVN3edm20ParameterDescriptionIiEE + 16B];
_18 = *__args#1_7(D);
MEM[(struct ParameterDescription *)_5].value_ = _18;
- MEM[(struct _Head_base *)_1(D)]._M_head_impl = _5;
return _1(D);
<L0>:
>From gcc-bugs-return-523124-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 12:29:42 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Mon, 25 Apr 2016 12:29:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Where _1(D) is
# PT =
struct __single_object & _1(D) = <retval>;
This is in a function deemed local (a ISRA specialization) and thus it looks
like we think there are no callers.
There are indeed callers but to different ISRA specializations. I suppose
(again) it is IPA ICF that merges them.
There seems to be a disconnect between what versioning does to DECL_RESULT
(and DECL_BY_REFERENCE) and what IPA PTA does vs. non-IPA PTA with regard
to such results. non-IPA just looks at gimple_call_return_slot_opt_p
while IPA only looks at DECL_BY_REFERENCE.
Index: gcc/tree-ssa-structalias.c
===================================================================
--- gcc/tree-ssa-structalias.c (revision 235404)
+++ gcc/tree-ssa-structalias.c (working copy)
@@ -4658,9 +4658,11 @@ find_func_aliases_for_call (struct funct
/* If we pass the result decl by reference, honor that. */
if (lhsop
- && fndecl
- && DECL_RESULT (fndecl)
- && DECL_BY_REFERENCE (DECL_RESULT (fndecl)))
+ && ((fndecl
+ && DECL_RESULT (fndecl)
+ && DECL_BY_REFERENCE (DECL_RESULT (fndecl)))
+ || (gimple_call_return_slot_opt_p (t)
+ && TREE_ADDRESSABLE (TREE_TYPE (lhsop)))))
{
struct constraint_expr lhs;
struct constraint_expr *rhsp;
fixes that but the following should also work (but is obviously less safe).
Index: gcc/tree-ssa-structalias.c
===================================================================
--- gcc/tree-ssa-structalias.c (revision 235404)
+++ gcc/tree-ssa-structalias.c (working copy)
@@ -4658,9 +4658,8 @@ find_func_aliases_for_call (struct funct
/* If we pass the result decl by reference, honor that. */
if (lhsop
- && fndecl
- && DECL_RESULT (fndecl)
- && DECL_BY_REFERENCE (DECL_RESULT (fndecl)))
+ && gimple_call_return_slot_opt_p (t)
+ && TREE_ADDRESSABLE (TREE_TYPE (lhsop)))
{
struct constraint_expr lhs;
struct constraint_expr *rhsp;
so can you test the latter on your app? I'm giving it IPA PTA + LTO bootstrap
testing.
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Subject: [Bug fortran/70697] ICE on EVENT WAIT with array element UNTIL_COUNT argument
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-25
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 5.3.1 up to trunk (7.0). 5.3.0 gives the errors
pr70697.f90:3:18:
type(event_type) done[*]
1
Error: Derived type 'event_type' at (1) is being used before it is defined
pr70697.f90:4:2:
event wait(done,until_count=nc(1))
1
Error: Unclassifiable statement at (1)
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
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--- Comment #4 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
I will test the second patch. Will take a few hours (it's millions of lines in
C++).
>From gcc-bugs-return-523127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 12:42:30 2016
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Subject: [Bug target/70454] --with-arch=native isn't applied to 32-bit x86 target library
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--- Comment #5 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Mon Apr 25 12:41:43 2016
New Revision: 235411
URL: https://gcc.gnu.org/viewcvs?rev=235411&root=gcc&view=rev
Log:
Revert the last change in libatomic
Need to properly check if -march=i486 is really needed for -m32 build
of libatomic on Linux/x86 and Linux/x86-64.
PR target/70454
* configure.tgt (XCFLAGS): Revert the last change.
Modified:
trunk/libatomic/ChangeLog
trunk/libatomic/configure.tgt
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Subject: [Bug preprocessor/16358] -Wno-system-headers hides warning caused by user header vs system header conflict
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--- Comment #11 from niva at niisi dot msk.ru ---
(in reply to Martin Sebor in comment #10)
Implementation of -Wmacro-redefined (with possibility of turning this warning
to error) would solve the problem of our users.
>From gcc-bugs-return-523129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 12:56:07 2016
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
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--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 25 Apr 2016, david.abdurachmanov at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70760
>
> --- Comment #4 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
> I will test the second patch. Will take a few hours (it's millions of lines in
> C++).
Thanks. Just in case also test the first variant - the second (not sure
what unpatched GCC does) runs into a miscompile when LTO bootstrapping
with IPA PTA enabled.
This all looks a bit fishy (and I failed to create a small testcase
even though I tried for half an hour)
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #45 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I don't think M4 env var should make a difference in this case, in the release
tarballs the gengtype-lex.c file is already built (on x86_64-linux) and nothing
should be changing that.
That said, I've managed to reproduce the miscompare on build/ggc-none.o as an
example of very small source file, even with -g0. But it looks really weird.
First of all, it seems that the system g++ 4.8 and g++ 6.1-rc2 is probably ABI
incompatible, at least my attempts to mix stage1 and stage2 objects into the
same binary failed miserably. I've rebuilt stage2-gcc/ cc1plus with
CXXFLAGS='-g -O0', thus most if not all *.o files linked into it should be
(like in stage1) built without optimizations, and still see the differences.
Trying to find out where the differences start now using parallel gdb sessions.
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
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--- Comment #6 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
Will do, results will be late today or tomorrow.
>From gcc-bugs-return-523133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 13:22:44 2016
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Subject: [Bug c/67784] Incorrect parsing when using declarations in for loops and typedefs
Date: Mon, 25 Apr 2016 13:22:00 -0000
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--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Sorry about that. I'll have another look.
>From gcc-bugs-return-523132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 13:22:24 2016
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
It looks to me we are using the wrong predicates but maybe the GIMPLE side is
somewhat disconnected here.
Index: gcc/tree-ssa-structalias.c
===================================================================
--- gcc/tree-ssa-structalias.c (revision 235404)
+++ gcc/tree-ssa-structalias.c (working copy)
@@ -4642,9 +4642,7 @@ find_func_aliases_for_call (struct funct
get_constraint_for (lhsop, &lhsc);
rhs = get_function_part_constraint (fi, fi_result);
- if (fndecl
- && DECL_RESULT (fndecl)
- && DECL_BY_REFERENCE (DECL_RESULT (fndecl)))
+ if (aggregate_value_p (lhsop, gimple_call_fntype (t)))
{
auto_vec<ce_s, 2> tem;
tem.quick_push (rhs);
@@ -4658,9 +4656,7 @@ find_func_aliases_for_call (struct funct
/* If we pass the result decl by reference, honor that. */
if (lhsop
- && fndecl
- && DECL_RESULT (fndecl)
- && DECL_BY_REFERENCE (DECL_RESULT (fndecl)))
+ && aggregate_value_p (lhsop, gimple_call_fntype (t)))
{
struct constraint_expr lhs;
struct constraint_expr *rhsp;
looks correct to me and would also work for indirect calls (though those
are probably "safe" because we don't optimize them very well as we think
having its address taken makes optimization not possible - sth where IPA
PTA needs to be improved).
>From gcc-bugs-return-523135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 13:23:27 2016
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Subject: [Bug ipa/70785] LTO bootstrap with IPA PTA is broken
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-25
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Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-523134-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 13:23:12 2016
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Subject: [Bug ipa/70785] New: LTO bootstrap with IPA PTA is broken
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Bug ID: 70785
Summary: LTO bootstrap with IPA PTA is broken
Product: gcc
Version: 6.0
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gen* in stage2 are miscompiled.
>From gcc-bugs-return-523136-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 13:31:20 2016
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From: "david.abdurachmanov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Mon, 25 Apr 2016 13:31:00 -0000
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--- Comment #8 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
Should I continue testing the 2nd patch, or dump whatever is currently built
and restart with the patch from your latest comment?
>From gcc-bugs-return-523137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 13:32:16 2016
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Subject: [Bug tree-optimization/68030] Redundant address calculations in vectorized loop
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Kirill Yukhin <kyukhin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amker.cheng at gmail dot com
--- Comment #4 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Hello Bin,
Is it possible to handle the issue using current ivopt?
>From gcc-bugs-return-523138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 13:36:14 2016
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From: "ktamp at chem dot uoa.gr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/70786] New: Missing "not" breaks Ada.Text_IO.Get_Immediate(File, Item, Available)
Date: Mon, 25 Apr 2016 13:36:00 -0000
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Bug ID: 70786
Summary: Missing "not" breaks Ada.Text_IO.Get_Immediate(File,
Item, Available)
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
OS: Arch Linux x64
GCC version: 5.3.0
Missing "not" in line #671 of a-textio.adb causes Get_Immediate(File, Item,
Available) to throw an exception when key "[" is pressed. This also affects
processing of keypresses when function keys F5 to F12 are pressed.
Get_Immediate(File, Item) does not have the same issue because "not" is there
(line #611): "(if not Is_Start_Of_Encoding (Character'Val (ch),
File.WC_Method)"
Example code (run and press e.g. key F12):
with Ada.Text_IO; use Ada.Text_IO;
procedure Test is
C : Character;
Available : Boolean;
begin
Get_Immediate (C);
loop
Put (Integer'Image (Character'Pos (C)));
Get_Immediate (C, Available);
exit when not Available;
end loop;
end Test;
>From gcc-bugs-return-523139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 13:44:46 2016
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From: "vogt at linux dot vnet.ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/70787] New: No time and child info with -pg and gccgo
Date: Mon, 25 Apr 2016 13:44:00 -0000
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Bug ID: 70787
Summary: No time and child info with -pg and gccgo
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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Priority: P3
Component: go
Assignee: ian at airs dot com
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CC: cmang at google dot com, krebbel at gcc dot gnu.org
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It looks like the -pg option does something wrong for Go programs. Example:
This program just wastes time in sub functions:
-- main.go --
package main
func foo () {
var i int
i = 0
for (i < 1000) { i++ }
}
func bar () {
var i int
i = 0
for (i < 1000) { i++ }
}
func main () {
var i int
i = 0
for (i < 1000000) { foo(); foo(); bar(); i++ }
}
-- snip --
$ gccgo -pg -O0 main.go
$ ./a.out
$ prof ./a.out gmoun.out
=>
index % time self children called name
0.00 0.00 3000000/3000000 main.main [8]
[1] 0.0 0.00 0.00 3000000 frame_dummy [1]
^^^ ^^^^ ^^^^
(actual run time was about 5 seconds)
Even for this very simple program without Go library dependencies, no timing
information seems to be dumped into the gmon.out file. Function calls have all
been counted in the "frame_dummy" bucket (double checked that functios have not
been inlied).
My vague first guess is that maybe the timing information is written to to some
place in memory but is read from a different place when generating gmon.out
because the profiling code is not aware of Gccgo's threading model(?).
>From gcc-bugs-return-523140-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 13:50:26 2016
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Subject: [Bug tree-optimization/68030] Redundant address calculations in vectorized loop
Date: Mon, 25 Apr 2016 13:50:00 -0000
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amker at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amker at gcc dot gnu.org
--- Comment #5 from amker at gcc dot gnu.org ---
(In reply to Kirill Yukhin from comment #4)
> Hello Bin,
> Is it possible to handle the issue using current ivopt?
Not yet I think. IIUC, this is the same issue as PR69710. We need to teach
vectorizer about CSE opportunities. I had a scratch patch fixing it in a way
just as mentioned in #comment2, I will revisit it after work on if-conversion.
According to Richard's comment, I may need to make it a general fix, for
example, share this facility among different optimizers that need to insert
code in pre-header.
Thanks.
>From gcc-bugs-return-523141-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 13:54:27 2016
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From: "vogt at linux dot vnet.ibm.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug go/70787] No time and child info with -pg and gccgo
Date: Mon, 25 Apr 2016 13:54:00 -0000
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--- Comment #1 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
(I've also tried setting GMON_OUT_PREFIX so that the gmon.out file does not get
overwritten by different threads, but in either case only one dump file is
created.)
>From gcc-bugs-return-523142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 14:12:18 2016
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Mon, 25 Apr 2016 14:12:00 -0000
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--- Comment #9 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 25 Apr 2016, david.abdurachmanov at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70760
>
> --- Comment #8 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
> Should I continue testing the 2nd patch, or dump whatever is currently built
> and restart with the patch from your latest comment?
I think the patch from the last comment is most correct, the 2nd is
wrong. The first one is safest at this point.
>From gcc-bugs-return-523143-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 14:13:19 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Mon, 25 Apr 2016 14:13:00 -0000
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--- Comment #46 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, my current thinking is that this is related to make -jN bootstrap doing
stage1 checking by default.
Guess with --enable-stage1-checking=release it would bootstrap fine, but
haven't verified that.
But, what I see is that if I build build/ggc-none.o with stage1 cc1plus with
additional -fno-checking -g0, the result is the same as when it is built with
stage2 cc1plus -g0, and similarly if it is built with stage1 cc1plus with -g0,
the result is the same when it is built with stage2 cc1plus -g0 -fchecking.
I've applied the https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70594#c20 hack
(only the tree.c part of it) and I can see that with -fchecking there are
different DECL_UIDs (more of them too) created.
>From gcc-bugs-return-523144-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 14:34:25 2016
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Subject: [Bug middle-end/32667] block copy with exact overlap is expanded as memcpy
Date: Mon, 25 Apr 2016 14:34:00 -0000
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--- Comment #15 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Sun, 24 Apr 2016, lopresti at gmail dot com wrote:
> That said, this is clearly a real bug in GCC. memcpy has a well-defined
> interface; GCC emits calls violating that interface; therefore GCC is buggy. I
> do not see why this is even controversial. (Also see Julian Seward's
> description of real-world problems in comment 5.)
As far as I know, that does not describe real-world problems on any target
supported by GCC.
> GCC either needs to provide its own mempcy or it needs to respect the
> interface. The cost of the latter is surely trivial, especially since many
> cases could be optimized by alias analysis.
Or it could simply document an additional requirement on the C library
used with GCC (that the case of exact overlap works), just as it documents
the requirement that some functions such as memcpy be provided even in the
freestanding case. The compiler and library implementations need to
cooperate to produce a conforming C implementation.
>From gcc-bugs-return-523145-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 14:37:37 2016
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Subject: [Bug sanitizer/70712] False positive from AddressSanitizer with use of 'alignas'
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--- Comment #5 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Thank you.
I can confirm that the fix also resolves the original problem from which I
derived the sample program.
>From gcc-bugs-return-523146-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 14:46:25 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70788] New: LaTeX formulae in doxygen comments should be suppressed in man-page output
Date: Mon, 25 Apr 2016 14:46:00 -0000
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Bug ID: 70788
Summary: LaTeX formulae in doxygen comments should be
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Doxygen's formula support only works for HTML and LaTeX output, so the
generated man pages contain garbled LaTeX such as "x_{i+1}tarrow(ax_{i} + c) d
]"
>From gcc-bugs-return-523147-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 14:48:34 2016
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Subject: [Bug libstdc++/70788] LaTeX formulae in doxygen comments should be suppressed in man-page output
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-25
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Errors from the Debian package include several due to this issue:
usr/share/man/man3/__gnu_cxx.3cxx.gz 1319: a space character is not allowed
in an escape name
usr/share/man/man3/__gnu_debug::_Safe_unordered_container_base.3cxx.gz 111:
warning [p 2, 2.2i]: can't break line
usr/share/man/man3/__gnu_parallel.3cxx.gz 2415: warning: numeric expression
expected (got `r')
usr/share/man/man3/__gnu_pbds::detail::left_child_next_sibling_heap_const_iterator_.3cxx.gz
11: warning [p 1, 1.8i]: can't break line
usr/share/man/man3/__gnu_pbds::detail::left_child_next_sibling_heap_node_point_const_iterator_.3cxx.gz
5: warning [p 1, 0.8i]: can't break line
usr/share/man/man3/std::_Hashtable.3cxx.gz 211: warning [p 2, 7.2i]: can't
break line
usr/share/man/man3/std::__debug::map.3cxx.gz 200: warning [p 2, 4.8i]:
can't break line
usr/share/man/man3/std::__debug::multimap.3cxx.gz 200: warning [p 2, 5.0i]:
can't break line
usr/share/man/man3/std::__debug::unordered_map.3cxx.gz 209: warning [p 2,
6.3i]: can't break line
usr/share/man/man3/std::__debug::unordered_multimap.3cxx.gz 209: warning [p
2, 6.7i]: can't break line
usr/share/man/man3/std::__profile::map.3cxx.gz 182: warning [p 2, 4.0i]:
can't break line
usr/share/man/man3/std::__profile::multimap.3cxx.gz 176: warning [p 2,
3.7i]: can't break line
usr/share/man/man3/std::__profile::unordered_map.3cxx.gz 119: warning [p 2,
0.0i]: can't break line
usr/share/man/man3/std::__profile::unordered_multimap.3cxx.gz 116: warning
[p 2, 0.0i]: can't break line
usr/share/man/man3/std::error_condition.3cxx.gz 17: warning [p 1, 2.0i]:
can't break line
usr/share/man/man3/std::exponential_distribution.3cxx.gz 30: warning:
numeric expression expected (got `m')
usr/share/man/man3/std::extreme_value_distribution.3cxx.gz 94: a space
character is not allowed in an escape name
usr/share/man/man3/std::fisher_f_distribution.3cxx.gz 103: a space
character is not allowed in an escape name
usr/share/man/man3/std::gamma_distribution.3cxx.gz 30: normal or special
character expected (got `\&')
usr/share/man/man3/std::linear_congruential_engine.3cxx.gz 97: a space
character is not allowed in an escape name
usr/share/man/man3/std::lognormal_distribution.3cxx.gz 99: a space
character is not allowed in an escape name
usr/share/man/man3/std::map.3cxx.gz 179: warning [p 2, 4.7i]: can't break
line
usr/share/man/man3/std::multimap.3cxx.gz 172: warning [p 2, 4.2i]: can't
break line
usr/share/man/man3/std::normal_distribution.3cxx.gz 102: a space character
is not allowed in an escape name
usr/share/man/man3/std::queue.3cxx.gz 197: warning: macro `c'' not defined
usr/share/man/man3/std::regex_iterator.3cxx.gz 42: warning [p 1, 4.0i]:
can't break line
usr/share/man/man3/std::regex_token_iterator.3cxx.gz 51: warning [p 1,
5.8i]: can't break line
usr/share/man/man3/std::student_t_distribution.3cxx.gz 100: a space
character is not allowed in an escape name
usr/share/man/man3/std::subtract_with_carry_engine.3cxx.gz 99: a space
character is not allowed in an escape name
usr/share/man/man3/std::unordered_map.3cxx.gz 306: warning [p 3, 6.0i]:
can't break line
usr/share/man/man3/std::unordered_multimap.3cxx.gz 306: warning [p 3,
6.8i]: can't break line
usr/share/man/man3/std::weibull_distribution.3cxx.gz 94: a space character
is not allowed in an escape name
>From gcc-bugs-return-523148-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 14:52:36 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Mon, 25 Apr 2016 14:52:00 -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 #47 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, I believe it is the:
/* When checking, try to get a constant value for all non-dependent
expressions in order to expose bugs in *_dependent_expression_p
and constexpr. */
if (flag_checking && cxx_dialect >= cxx11
/* Don't do this during nsdmi parsing as it can lead to
unexpected recursive instantiations. */
&& !parsing_nsdmi ())
fold_non_dependent_expr (expr);
hunk in cp/pt.c (build_nondependent_expr), which results both in some extra
DECL_UIDs being created (in theory it could be fine), but also in funcdef_no
differences etc.:
#0 _Z24allocate_struct_functionP9tree_nodeb (fndecl=0x7061b280,
abstract_p=false) at /home/dje/src/gcc-6.0.1-RC2/gcc/function.c:4874
#1 0x10070e60 in _Z24start_preparsed_functionP9tree_nodeS0_i
(decl1=0x7061b280, attrs=0x0, flags=1)
at /home/dje/src/gcc-6.0.1-RC2/gcc/cp/decl.c:14059
#2 0x105feb9c in _Z16instantiate_declP9tree_nodeib (d=0x7061b280, defer_ok=0,
expl_inst_class_mem_p=false)
at /home/dje/src/gcc-6.0.1-RC2/gcc/cp/pt.c:21969
#3 0x1094fd38 in _Z9mark_usedP9tree_nodei (decl=0x7061b280, complain=0) at
/home/dje/src/gcc-6.0.1-RC2/gcc/cp/decl2.c:5273
#4 0x1023262c in _ZL15build_over_callP11z_candidateii (cand=0x306323c0,
flags=262145, complain=0)
at /home/dje/src/gcc-6.0.1-RC2/gcc/cp/call.c:7707
#5 0x10221f8c in
_Z23build_new_function_callP9tree_nodePP3vecIS0_5va_gc8vl_embedEbi
(fn=0x7045e468, args=0x2ff200f0, koenig_p=false, complain=0)
at /home/dje/src/gcc-6.0.1-RC2/gcc/cp/call.c:4152
#6 0x100dba64 in _Z16finish_call_exprP9tree_nodePP3vecIS0_5va_gc8vl_embedEbbi
(fn=0x7045e468, args=0x2ff200f0, disallow_virtual=false,
koenig_p=false, complain=0) at
/home/dje/src/gcc-6.0.1-RC2/gcc/cp/semantics.c:2461
#7 0x105e30ac in _Z21tsubst_copy_and_buildP9tree_nodeS0_iS0_bb (t=0x7061e180,
args=0x0, complain=0, in_decl=0x0, function_p=false,
integral_constant_expression_p=true) at
/home/dje/src/gcc-6.0.1-RC2/gcc/cp/pt.c:16629
#8 0x105a4bf8 in _Z39instantiate_non_dependent_expr_internalP9tree_nodei
(expr=0x7061e180, complain=0)
at /home/dje/src/gcc-6.0.1-RC2/gcc/cp/pt.c:5640
#9 0x114c1278 in _Z23fold_non_dependent_exprP9tree_node (t=0x7061e180) at
/home/dje/src/gcc-6.0.1-RC2/gcc/cp/constexpr.c:4388
#10 0x10606e08 in _Z24build_non_dependent_exprP9tree_node (expr=0x7061e180) at
/home/dje/src/gcc-6.0.1-RC2/gcc/cp/pt.c:23631
As stage1 is built with the default --enable-stage1-checking, the result
between stage1 and stage2 auto-host.h is:
CHECKING_P, ENABLE_GC_CHECKING, ENABLE_GIMPLE_CHECKING,
ENABLE_RTL_FLAG_CHECKING, ENABLE_TREE_CHECKING, ENABLE_TYPES_CHECKING, and
allocate_struct_function allocates a new cfun->funcdef_no, which is then
emitted in the LFB..*/LFE..* labels, seems to affect the debug info (which on
AIX is emitted in both stage2 and stage3) etc.
Additionally, wonder if retrieve_specialization's
if (flag_checking)
verify_unstripped_args (args);
couldn't also affect bootstrap, but haven't seen that during bootstrap.
The question is what to do, comment out the fold_non_dependent_expr stuff
altogether on the release branch (at least temporarily), guard with some other
option (which unlike -fchecking would be documented to possibly affect code
generation and which would be based on some other configure checking flag (and
the default for that flag would be always the same between stage1 and later
stages), something different?
I'm in any case starting a bootstrap now with the fold_non_dependent_expr call
commented out.
>From gcc-bugs-return-523149-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 16:12:37 2016
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Subject: [Bug middle-end/32667] block copy with exact overlap is expanded as memcpy
Date: Mon, 25 Apr 2016 16:12:00 -0000
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--- Comment #16 from Patrick J. LoPresti <lopresti at gmail dot com> ---
Well, Valgrind itself is another real-world example. Tools like Valgrind cannot
distinguish invalid memcpy() calls by the programmer from invalid memcpy()
calls emitted by GCC.
You can, of course, redefine every standard interface you like and simply
document it. That would be awful engineering -- as in this case -- but you
could do it.
>From gcc-bugs-return-523150-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 16:54:10 2016
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Subject: [Bug target/68273] [5/6/7 Regression] Wrong code on mips/mipsel due to (invalid?) peeking at alignments in function_arg.
Date: Mon, 25 Apr 2016 16:54:00 -0000
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--- Comment #33 from Aurelien Jarno <aurelien at aurel32 dot net> ---
(In reply to Hector Oron from comment #32)
> (In reply to Richard Biener from comment #31)
> > eipa_sra introduces the remaining SSA name with non-default alignment via
>
> [PATCH]
>
For the record, Debian now have the patch from comment #32 in its version of
GCC 5 and 6. This fixes a few more issues than reported here, in addition to
graphviz, it also fixes subversion and jq.
>From gcc-bugs-return-523151-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 17:33:51 2016
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Subject: [Bug c++/67247] ICE on std::forward args&& inside nested lambda function
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tower120 <tower120 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.0
--- Comment #4 from tower120 <tower120 at gmail dot com> ---
Reduced case [Forwarding captured variadic arguments inside lambda] :
https://godbolt.org/g/D7lXEA
template<typename... T>
int g(T... t)
{
return 0;
}
template<class... Args>
void f(Args&&... args)
{
auto lm = [&](auto&&..._args) {
auto f = [&]{g(std::forward<decltype(_args)>(_args)...);};
//auto f = [&]{g(_args...);}; /* THIS ONE OK */
return f();
};
lm(args...);
}
int main()
{
f(2, 5, 7);
}
Error "_args was not declared" on 4.9.x
ICE on 5.x
Ok on 6.x
>From gcc-bugs-return-523152-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 17:36:46 2016
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From: "bernds at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70789] New: cilk test fib-tplt.cc occasionally fails
Date: Mon, 25 Apr 2016 17:36:00 -0000
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Bug ID: 70789
Summary: cilk test fib-tplt.cc occasionally fails
Product: gcc
Version: 7.0
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I've had a test run fail with
FAIL: g++.dg/cilk-plus/CK/fib-tplt.cc -g -fcilkplus execution test
This was while testing the -m32 variant. I've let the test run in a loop for a
few hours, and it seems to fail sporadically with a segfault, almost certainly
not because of the fairly harmless patch I was testing. I've tried to load the
coredump into gdb, unfortunately it's not very informative.
(gdb) bt
#0 0x00001c46 in ?? ()
#1 0xf76d3587 in ?? ()
#2 0xf76d3347 in ?? ()
#3 0x00000000 in ?? ()
Tagging it as wrong-code although I'm not sure whether the testcase is valid.
We seem not to have a libcilkrts component.
>From gcc-bugs-return-523153-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 17:44:27 2016
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Subject: [Bug c/12245] [4.9/5/6/7 regression] Uses lots of memory when compiling large initialized arrays
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Franc[e]sco <lolisamurai at waifu dot club> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |lolisamurai at waifu dot club
--- Comment #59 from Franc[e]sco <lolisamurai at waifu dot club> ---
I can confirm this still happens in gcc 4.9.3 (gentoo linux, amd64), here's an
example: https://ideone.com/J699eJ
>From gcc-bugs-return-523154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 18:24:01 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #48 from David Edelsohn <dje at gcc dot gnu.org> ---
Commenting out the fold_non_dependent_expr call seems to work for me using the
build method that regularly was failing before.
>From gcc-bugs-return-523155-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 19:13:35 2016
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Mon, 25 Apr 2016 19:13:00 -0000
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--- Comment #49 from David Edelsohn <dje at gcc dot gnu.org> ---
Can we add some testcases to ensure that -fchecking and similar flags don't
accidentally affect code generation due to future changes?
>From gcc-bugs-return-523156-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 19:15:42 2016
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Subject: [Bug middle-end/70773] Profiling makes sudoku solver slower
Date: Mon, 25 Apr 2016 19:15:00 -0000
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--- Comment #5 from PeteVine <tulipawn at gmail dot com> ---
The issue seems to be purely about soft division. (I was either using no -mcpu
or -mcpu=cortex-a5)
Compiling for e.g Cortex-A7, doesn't need to lower any library calls and even
though hardware division is not used in the vanilla case, it is after
profiling.
The profiled binary even shows a benefit under qemu-arm so I can safely guess
the issue is non-existent when targeting similar ARM parts.
>From gcc-bugs-return-523157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 19:27:31 2016
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Subject: [Bug c++/70790] New: Can't mangle noexcept expressions
Date: Mon, 25 Apr 2016 19:27:00 -0000
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Bug ID: 70790
Summary: Can't mangle noexcept expressions
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#include <utility>
template<class T>
void foo(T, typename std::enable_if<noexcept(T(std::declval<T>())), int>::type)
{
}
int main() {
foo(0,0);
}
Results in:
Test.cpp: In instantiation of ‘void foo(T, typename std::enable_if<noexcept
((T)(declval<T>())), int>::type) [with T = int; typename
std::enable_if<noexcept ((T)(declval<T>())), int>::type = int]’:
Test.cpp:19:6: sorry, unimplemented: mangling noexcept_expr
void foo(T, typename std::enable_if<noexcept(T(std::declval<T>())),
int>::type)
^
>From gcc-bugs-return-523158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 19:42:46 2016
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Subject: [Bug middle-end/32667] block copy with exact overlap is expanded as memcpy
Date: Mon, 25 Apr 2016 19:42:00 -0000
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--- Comment #17 from Alexander Cherepanov <ch3root at openwall dot com> ---
On 2016-04-25 17:34, joseph at codesourcery dot com wrote:
> Or it could simply document an additional requirement on the C library
> used with GCC (that the case of exact overlap works), just as it documents
> the requirement that some functions such as memcpy be provided even in the
> freestanding case. The compiler and library implementations need to
> cooperate to produce a conforming C implementation.
1. Is glibc community ready to provide such guarantee? The doc[1]
doesn't currently mention an exception for exact overlap.
[1]
https://www.gnu.org/software/libc/manual/html_node/Copying-Strings-and-Arrays.html#index-memcpy
2. I agree that it should be documented. Together with the assumption
that memcpy doesn't clobber errno.
3. The decision affects the whole Free Software community. If memcpy
with exact overlap inserted be gcc are legitimized then users cannot use
tools like valgrind to catch such cases in their own code. (And neither
_FORTIFY_SOURCE nor UBSan seem to catch overlapping memcpy now.) So it
effectively leads to legitimizing such memcpy in user's code too. Making
memcpy closer to a simple assignment (C11, 6.5.16.1p3) could be a good
thing. Maybe even fix C std or POSIX?
BTW llvm bug is here: https://llvm.org/bugs/show_bug.cgi?id=11763 . It
also contains links to valgrind discussions.
>From gcc-bugs-return-523159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 20:06:01 2016
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Subject: [Bug c/70791] New: -Wnested-externs prints inconsistent column number
Date: Mon, 25 Apr 2016 20:06:00 -0000
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Bug ID: 70791
Summary: -Wnested-externs prints inconsistent column number
Product: gcc
Version: 6.0
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Host: i386-apple-darwin9.8.0
Target: i386-apple-darwin9.8.0
Build: i386-apple-darwin9.8.0
Say I have the following file:
$ cat undeclared.c
char *foo(char *);
int bar(void) {
char *baz = foo(UNDECLARED_MACRO(""));
}
When I compile it like this, gcc says:
$ /usr/local/bin/gcc -c -Wimplicit -Wnested-externs -Wint-conversion
undeclared.c
undeclared.c: In function ‘bar’:
undeclared.c:4:18: warning: implicit declaration of function ‘UNDECLARED_MACRO’
[-Wimplicit-function-declaration]
char *baz = foo(UNDECLARED_MACRO(""));
^
undeclared.c:4:2: warning: nested extern declaration of ‘UNDECLARED_MACRO’
[-Wnested-externs]
char *baz = foo(UNDECLARED_MACRO(""));
^
undeclared.c:4:18: warning: passing argument 1 of ‘foo’ makes pointer from
integer without a cast [-Wint-conversion]
char *baz = foo(UNDECLARED_MACRO(""));
^
undeclared.c:1:7: note: expected ‘char *’ but argument is of type ‘int’
char *foo(char *);
^
I would expect the warning from -Wnested-externs to point to the same column as
the other 2 warnings.
(Of course, ideally the 3 would be combined into a single warning, but that's a
separate issue)
My gcc version info:
$ /usr/local/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/i386-apple-darwin9.8.0/6.0.0/lto-wrapper
Target: i386-apple-darwin9.8.0
Configured with: ../configure --disable-werror
--enable-languages=c,c++,lto,objc,obj-c++ --enable-stage1-checking=release -C
--with-system-libunwind --enable-secureplt --enable-frame-pointer
--enable-version-specific-runtime-libs --enable-assert --enable-fat
--enable-portable-binary --enable-browser-plugin --enable-gconf-peer
--enable-libgcj-debug --enable-gc-debug --enable-interpreter
--enable-aot-compile-rpm --enable-java-home --with-x --enable-collections
--enable-gstreamer-peer --enable-xmlj --enable-qt-peer --enable-debug
--enable-local-sockets --without-isl --enable-objc-gc --enable-maintainer-mode
--enable-host-shared CC=/usr/local/bin/gcc CXX=/usr/local/bin/g++
AUTOCONF=/usr/local/bin/autoconf AUTOHEADER=/usr/local/bin/autoheader
AUTOM4TE=/usr/local/bin/autom4te AUTORECONF=/usr/local/bin/autoreconf
AUTOSCAN=/usr/local/bin/autoscan AUTOUPDATE=/usr/local/bin/autoupdate
IFNAMES=/usr/local/bin/ifnames
Thread model: posix
gcc version 6.0.0 20151007 (experimental) (GCC)
>From gcc-bugs-return-523160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 20:06:18 2016
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From: "lefticus at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70792] New: Incorrect sequence point warning with uniform initializer syntax
Date: Mon, 25 Apr 2016 20:06:00 -0000
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Bug ID: 70792
Summary: Incorrect sequence point warning with uniform
initializer syntax
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The following code:
#include <utility>
struct Do_Call
{
template<typename Func, typename ... T>
Do_Call(const Func &f, T && ... t)
{
f(std::forward<T>(t)...);
}
};
int main()
{
const auto sum = [](int w, int x, int y, int z) {
return w + x + y + z;
};
int i = 0;
Do_Call{sum, ++i, ++i, ++i, ++i};
}
Generates the -Wsequence-point warning for the variable 'i'. However, the
standard states:
"Within the initializer-list of a braced-init-list, the initializer-clauses,
including any that result from pack expansions (14.5.3), are evaluated in the
order in which they appear. That is, every value computation and side effect
associated with a given initializer-clause is sequenced before every value
computation and side effect associated with any initializer-clause that follows
it in the comma-separated list of the initializer-list. [Note: This evaluation
ordering holds regardless of the semantics of the initialization; for example,
it applies when the elements of the initializer-list are interpreted as
arguments of a constructor call, even though ordinarily there are no sequencing
constraints on the arguments of a call. —end note ]"
The "Note: This evaluation ordering holds regardless of the semantics of the
initialization; for example, it applies when the elements of the
initializer-list are interpreted as arguments of a constructor call, even
though ordinarily there are no sequencing constraints on the arguments of a
call. —end note" is the most applicable to this bug report.
This occurs in all versions tested between 4.7.3->6
>From gcc-bugs-return-523161-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 20:37:46 2016
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Subject: [Bug c++/70792] Incorrect sequence point warning with uniform initializer syntax
Date: Mon, 25 Apr 2016 20:37:00 -0000
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--- Comment #1 from Jason Turner <lefticus at gmail dot com> ---
Note: I tested this code further and the compiler seems to be generating
incorrect code based on this standard, not just warning incorrectly.
>From gcc-bugs-return-523162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 20:39:21 2016
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From: "jpmarath at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70793] New: g++ does not accept some forms of "friend" declaration for builtin types
Date: Mon, 25 Apr 2016 20:39:00 -0000
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Bug ID: 70793
Summary: g++ does not accept some forms of "friend" declaration
for builtin types
Product: gcc
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This fails to compile:
struct S {
friend short ;
} s;
with gcc 5.3.1, the reported error is (compile with -std=c++14):
---
2 : error: friend declaration does not name a class or function
friend short ;
^
Compilation failed
---
The strange thing is that g++ accepts "friend short int;" :
struct S {
friend short int;
} s;
clang++ 3.8 accepts both forms.
>From gcc-bugs-return-523163-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 22:29:25 2016
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Subject: [Bug target/70098] PowerPC64: eigen hits ICE following invalid register assignment
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--- Comment #10 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Mon Apr 25 22:28:36 2016
New Revision: 235423
URL: https://gcc.gnu.org/viewcvs?rev=235423&root=gcc&view=rev
Log:
[gcc]
2016-04-25 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2016-03-14 Segher Boessenkool <segher@kernel.crashing.org>
PR target/70098
* config/rs6000/rs6000.md (*ctr<mode>_internal1, *ctr<mode>_internal2,
*ctr<mode>_internal5, *ctr<mode>_internal6): Also allow "d" as output.
(define_split for the GPR case): Use int_reg_operand instead of
gpc_reg_operand for the output.
[gcc/testsuite]
2016-04-25 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2016-03-14 Segher Boessenkool <segher@kernel.crashing.org>
PR target/70098
* lib/target-supports.exp (check_effective_target_powerpc64_no_dm):
New function.
* g++.dg/pr70098.C: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/pr70098.C
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/rs6000/rs6000.md
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/testsuite/lib/target-supports.exp
>From gcc-bugs-return-523164-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 22:30:36 2016
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Subject: [Bug target/70098] PowerPC64: eigen hits ICE following invalid register assignment
Date: Mon, 25 Apr 2016 22:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70098
--- Comment #11 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Mon Apr 25 22:29:49 2016
New Revision: 235424
URL: https://gcc.gnu.org/viewcvs?rev=235424&root=gcc&view=rev
Log:
[gcc]
2016-04-25 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2016-03-14 Segher Boessenkool <segher@kernel.crashing.org>
PR target/70098
* config/rs6000/rs6000.md (*ctr<mode>_internal1, *ctr<mode>_internal2,
*ctr<mode>_internal5, *ctr<mode>_internal6): Also allow "d" as output.
(define_split for the GPR case): Use int_reg_operand instead of
gpc_reg_operand for the output.
[gcc/testsuite]
2016-04-25 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2016-03-14 Segher Boessenkool <segher@kernel.crashing.org>
PR target/70098
* lib/target-supports.exp (check_effective_target_powerpc64_no_dm):
New function.
* g++.dg/pr70098.C: New testcase.
Added:
branches/gcc-4_9-branch/gcc/testsuite/g++.dg/pr70098.C
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/config/rs6000/rs6000.md
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
branches/gcc-4_9-branch/gcc/testsuite/lib/target-supports.exp
>From gcc-bugs-return-523165-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 23:34:55 2016
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Subject: [Bug c++/70792] Incorrect sequence point warning with uniform initializer syntax
Date: Mon, 25 Apr 2016 23:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70792
--- Comment #2 from Jason Turner <lefticus at gmail dot com> ---
Follow up, this is a better test case that does not pass by &&
struct MyType {
MyType(int i, int j, int k, int l)
: sum(i + j + k + l)
{
}
int sum;
};
int main()
{
int i = 0;
std::cout << MyType{ ++i, ++i, ++i, ++i }.sum << '\n';
}
>From gcc-bugs-return-523166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Apr 25 23:45:15 2016
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From: "numien at deathwyrm dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70794] New: vector.push_back() crashes with std::bad_alloc after 2^32 calls
Date: Mon, 25 Apr 2016 23:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70794
Bug ID: 70794
Summary: vector.push_back() crashes with std::bad_alloc after
2^32 calls
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: numien at deathwyrm dot com
Target Milestone: ---
Created attachment 38340
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38340&action=edit
Minimal test program
Despite std::vector::max_size() returning 18446744073709551615, a test program
to repeatedly call std::vector::push_back() crashes on the 4294967297th
iteration with a std::bad_alloc exception.
I am compiling in 64-bit mode, and my system should have plenty of memory. The
fact it's reaching exactly 2^32 indicates to me that it's likely a bug.
The test program I used is attached.
>From gcc-bugs-return-523167-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 00:30:41 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70795] New: [7 Regression] gcc/libjava/interpret.cc:1948:1: ICE: in binds_to_current_def_p, at symtab.c:2232
Date: Tue, 26 Apr 2016 00:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70795
Bug ID: 70795
Summary: [7 Regression] gcc/libjava/interpret.cc:1948:1: ICE:
in binds_to_current_def_p, at symtab.c:2232
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: danglin at gcc dot gnu.org
Target Milestone: ---
Host: hppa2.0w-hp-hpux11.11
Target: hppa2.0w-hp-hpux11.11
Build: hppa2.0w-hp-hpux11.11
libtool: compile: /test/gnu/gcc/objdir/./gcc/xgcc -shared-libgcc
-B/test/gnu/gcc/objdir/./gcc -nostdinc++
-L/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc+
+-v3/src -L/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/src/.libs
-L/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/libsupc++/.libs
-B/opt/gnu/gcc/gcc-7/hppa2.0w-hp-hpux11.11/bin/
-B/opt/gnu/gcc/gcc-7/hppa2.0w-hp-hpux11.1
1/lib/ -isystem /opt/gnu/gcc/gcc-7/hppa2.0w-hp-hpux11.11/include -isystem
/opt/gnu/gcc/gcc-7/hppa2.0w-hp-hpux11.11/sys-include -DHAVE_CONFIG_H -I.
-I../../../gcc/libjava -I./include -I./gcj -I../../../gcc/libjava -Iinclude
-I../../../gcc/li
bjava/include -I../../../gcc/libjava/classpath/include -Iclasspath/include
-I../../../gcc/libjava/classpath/native/fdlibm
-I../../../gcc/libjava/../boehm-gc/include -I../boehm-gc/include
-I../../../gcc/libjava/libltdl -I../../../gcc/libjava
/libltdl -I../../../gcc/libjava/.././libjava/../libgcc
-I../../../gcc/libjava/../zlib -I../../../gcc/libjava/../libffi/include
-I../libffi/include -fno-rtti -fnon-call-exceptions -pthread
-fdollars-in-identifiers -Wswitch-enum -D_FILE_OFFSE
T_BITS=64 -Wextra -Wall -D_GNU_SOURCE -DPREFIX=\"/opt/gnu/gcc/gcc-7\"
-DTOOLEXEC
LIBDIR=\"/opt/gnu/gcc/gcc-7/lib\" -DJAVA_HOME=\"/opt/gnu/gcc/gcc-7\"
-DBOOT_CLAS
S_PATH=\"/opt/gnu/gcc/gcc-7/share/java/libgcj-7.0.0.jar\"
-DJAVA_EXT_DIRS=\"/opt
/gnu/gcc/gcc-7/share/java/ext\"
-DGCJ_ENDORSED_DIRS=\"/opt/gnu/gcc/gcc-7/share/j
ava/gcj-endorsed\"
-DGCJ_VERSIONED_LIBDIR=\"/opt/gnu/gcc/gcc-7/lib/gcj-7.0.0-17\
" -DPATH_SEPARATOR=\":\" -DECJ_JAR_FILE=\"\"
-DLIBGCJ_DEFAULT_DATABASE=\"/opt/gn
u/gcc/gcc-7/lib/gcj-7.0.0-17/classmap.db\"
-DLIBGCJ_DEFAULT_DATABASE_PATH_TAIL=\
"gcj-7.0.0-17/classmap.db\" -fwrapv -g -O2 -MT interpret.lo -MD -MP -MF
.deps/in
terpret.Tpo -c ../../../gcc/libjava/interpret.cc -fPIC -DPIC -o
.libs/interpret.o
_GLOBAL__I_65535_0_.._.._.._gcc_libjava_interpret.cc_E29B42DF_0x4efdcb59/1100
(<built-in>) @7aeeb5e8
Type: function definition analyzed
Visibility: force_output public artificial constructor
References:
Referring:
Availability: available
First run: 0
Function flags: body static_constructor (priority:65535)
Called by:
Calls: _GLOBAL__sub_I_interpret.cc/861 (1.00 per call)
../../../gcc/libjava/interpret.cc: In function '<built-in>':
../../../gcc/libjava/interpret.cc:1948:1: internal compiler error: in
binds_to_current_def_p, at symtab.c:2232
}
^
This is revision 235394.
>From gcc-bugs-return-523168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 03:25:53 2016
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Subject: [Bug c++/66561] __builtin_LINE at al. should yield constant expressions
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66561
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-26
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Working on a patch for GCC 7.
>From gcc-bugs-return-523169-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 05:43:21 2016
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From: "rs2740 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70796] New: [DR 1030] Initialization order with braced-init-lists still broken
Date: Tue, 26 Apr 2016 05:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70796
Bug ID: 70796
Summary: [DR 1030] Initialization order with braced-init-lists
still broken
Product: gcc
Version: 7.0
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The following modified test case (replacing postfix ++ with prefix and
adjusting the expected values accordingly) from PR61382 still aborts on Wandbox
(http://melpon.org/wandbox/permlink/IQojTl16DtIxCd2M) and also gives a bogus
-Wsequence-point warning:
struct A
{
int i,j;
A(int i,int j):i(i),j(j){}
};
int main()
{
int i = 0;
A a{++i, ++i};
if (a.i != 1 || a.j != 2)
__builtin_abort();
}
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #50 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 26 06:08:20 2016
New Revision: 235429
URL: https://gcc.gnu.org/viewcvs?rev=235429&root=gcc&view=rev
Log:
PR bootstrap/70704
* pt.c (build_non_dependent_expr): Temporarily disable flag_checking
guarded code.
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/pt.c
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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--- Comment #51 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Apr 26 06:10:43 2016
New Revision: 235430
URL: https://gcc.gnu.org/viewcvs?rev=235430&root=gcc&view=rev
Log:
PR bootstrap/70704
* configure.ac (--enable-stage1-checking): For --disable-checking or
implicit --enable-checking, make sure extra flag matches in between
stage1 and later checking.
* configure: Regenerated.
gcc/
* configure.ac (--enable-checking): Document extra flag, for
non-release builds default to --enable-checking=yes,extra.
If misc checking and extra checking, define CHECKING_P to 2 instead
of 1.
* common.opt (fchecking=): Add.
* doc/invoke.texi (-fchecking=): Document.
* doc/install.texi: Document --enable-checking changes.
* configure: Regenerated.
* config.in: Regenerated.
gcc/cp/
* pt.c (build_non_dependent_expr): Use flag_checking > 1 instead of
just flag_checking.
Modified:
trunk/ChangeLog
trunk/configure
trunk/configure.ac
trunk/gcc/ChangeLog
trunk/gcc/common.opt
trunk/gcc/config.in
trunk/gcc/configure
trunk/gcc/configure.ac
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
trunk/gcc/doc/install.texi
trunk/gcc/doc/invoke.texi
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #52 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed. As for adding testcases, that is not trivial, we'd need to add a new
framework for that that would compile some tests both with -fchecking and
-fno-checking, and strip/sanitize the result and compare that.
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Subject: [Bug c++/58211] gcc: internal compiler error: Segmentation fault (program as)
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Abhijith Raghavendra <abhijithr1 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |abhijithr1 at gmail dot com
--- Comment #7 from Abhijith Raghavendra <abhijithr1 at gmail dot com> ---
I have installed DJGPP in MS DOS operating system (X86 machine), when i try to
compile the source i am getting the following .
gcc 2.c
gcc.exe: internal compiler error: (program as)
Please submit a full bug report,
with prepocessed source if appropriate.
see <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-523174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 07:30:32 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70797] New: gcc.exe: Internal compiler error: (program as)
Date: Tue, 26 Apr 2016 07:30:00 -0000
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Bug ID: 70797
Summary: gcc.exe: Internal compiler error: (program as)
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
I have installed DJGPP in MS DOS operating system (X86 machine), when i try to
compile the source i am getting the following .
gcc 2.c
gcc.exe: internal compiler error: (program as)
Please submit a full bug report,
with prepocessed source if appropriate.
see <http://gcc.gnu.org/bugs.html> for instructions.
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From: "knakahara at netbsd dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70798] New: optimize-strlen generate infinite recursion code when the program has own "calloc" function
Date: Tue, 26 Apr 2016 08:19:00 -0000
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Bug ID: 70798
Summary: optimize-strlen generate infinite recursion code when
the program has own "calloc" function
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: knakahara at netbsd dot org
Target Milestone: ---
Created attachment 38341
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38341&action=edit
reproduction code
COMPILER VERSION:
% gcc -v
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)
SYSTEM TYPE:
Ubuntu 16.04, here is the detail.
% uname -srvmpio
Linux 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64
x86_64 x86_64 GNU/Linux
WHAT HAPPENS 1:
When I compile the attached source code with "-O2" option, the output
executable file segmentation faulted. Here is the command line log.
% gcc -Wall -O2 calloc.c -o calloc
% ./calloc
zsh: segmentation fault (core dumped) ./calloc
% gdb calloc core
(gdb) bt
#0 0x0000000000400625 in calloc ()
#1 0x000000000040062a in calloc ()
#2 0x000000000040062a in calloc ()
#3 0x000000000040062a in calloc ()
#4 0x000000000040062a in calloc ()
#5 0x000000000040062a in calloc ()
#6 0x000000000040062a in calloc ()
#7 0x000000000040062a in calloc ()
#8 0x000000000040062a in calloc ()
#9 0x000000000040062a in calloc ()
:
:
continue until stack overflow
WHAT HAPPENS 2:
In contrast, I compile with the attached source code with "-O2" and
"-fno-optimize-strlen", the oputput executable file did not segmentation fault.
Here is the command line log.
% gcc -Wall -O2 -fno-optimize-strlen calloc.c -o calloc
% ./calloc
aaaa=0x229e010
EXPECTED BEHAVIOR:
Even when I compile with "-O2" only, the oputput executable file did not
segmentation fault.
SUPPLEMENT:
I also get this problem in gcc 5.3.0 on NetBSD-current(7.99.28).
Regards,
>From gcc-bugs-return-523176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 08:55:50 2016
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/60290] 32-bit g++.dg/cilk-plus/CK/catch_exc.cc FAILs on Solaris/x86
Date: Tue, 26 Apr 2016 08:55:00 -0000
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--- Comment #8 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Tue Apr 26 08:55:02 2016
New Revision: 235432
URL: https://gcc.gnu.org/viewcvs?rev=235432&root=gcc&view=rev
Log:
Compile libcilkrts with -funwind-tables (PR target/60290)
PR target/60290
* Makefile.am (GENERAL_FLAGS): Add -funwind-tables.
* Makefile.in: Regenerate.
Modified:
trunk/libcilkrts/ChangeLog
trunk/libcilkrts/Makefile.am
trunk/libcilkrts/Makefile.in
>From gcc-bugs-return-523177-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 08:59:49 2016
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Subject: [Bug target/60290] 32-bit g++.dg/cilk-plus/CK/catch_exc.cc FAILs on Solaris/x86
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--- Comment #9 from Rainer Orth <ro at gcc dot gnu.org> ---
Fixed for 7.1.
>From gcc-bugs-return-523178-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 09:10:26 2016
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From: "david.abdurachmanov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Tue, 26 Apr 2016 09:10:00 -0000
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--- Comment #10 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
I did a quick test (still took several hours) with #1 and #3 patches and both
seem to solve the issue. Patches were tested on top of r235408.
Just in case I will run patch #3 (for now) again, but will force the whole
world to be recompiled starting GCC. That is a more extensive, but also
expensive test.
>From gcc-bugs-return-523179-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 09:20:48 2016
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70799] New: STV pass does not convert DImode shifts and rotates
Date: Tue, 26 Apr 2016 09:20:00 -0000
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Bug ID: 70799
Summary: STV pass does not convert DImode shifts and rotates
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
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CC: hjl.tools at gmail dot com, ienkovich at gcc dot gnu.org
Target Milestone: ---
These should all be converted to DImode vector shifts for SSE2/AVX2 32bit
target (and similar for rotates):
long long a, b;
void test_ll (void)
{
a = b << 1;
}
void test_llv (int c)
{
a = b << c;
}
unsigned long long d, e;
void test_lr (void)
{
d = e >> 1;
}
void test_lrv (int c)
{
d = e >> c;
}
void test_ar (void)
{
a = b >> 1;
}
void test_arv (int c)
{
a = b >> c;
}
>From gcc-bugs-return-523180-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 09:25:05 2016
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Subject: [Bug c/12245] [4.9/5/6/7 regression] Uses lots of memory when compiling large initialized arrays
Date: Tue, 26 Apr 2016 09:25:00 -0000
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--- Comment #60 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 5 should have improved things a bit by wide-ints as small INTEGER_CSTs now
use 8 bytes less memory. A quick check with GCC 6 shows around ~200MB memory
use for the attached testcase.
Note that your last example uses C++ initializer lists which have its own
issue (quite expensive wrapping) and separate bugreports.
>From gcc-bugs-return-523181-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 09:29:23 2016
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Tue, 26 Apr 2016 09:29:00 -0000
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--- Comment #11 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 26 Apr 2016, david.abdurachmanov at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70760
>
> --- Comment #10 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
> I did a quick test (still took several hours) with #1 and #3 patches and both
> seem to solve the issue. Patches were tested on top of r235408.
>
> Just in case I will run patch #3 (for now) again, but will force the whole
> world to be recompiled starting GCC. That is a more extensive, but also
> expensive test.
Thanks for the effort!
>From gcc-bugs-return-523184-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 09:34:33 2016
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Subject: [Bug middle-end/70795] [7 Regression] gcc/libjava/interpret.cc:1948:1: ICE: in binds_to_current_def_p, at symtab.c:2232
Date: Tue, 26 Apr 2016 09:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
>From gcc-bugs-return-523182-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 09:34:11 2016
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Subject: [Bug middle-end/56888] memcpy implementation optimized as a call to memcpy
Date: Tue, 26 Apr 2016 09:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |knakahara at netbsd dot org
--- Comment #36 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 70798 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523183-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 09:34:11 2016
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Subject: [Bug c/70798] optimize-strlen generate infinite recursion code when the program has own "calloc" function
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |DUPLICATE
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Duplicate.
*** This bug has been marked as a duplicate of bug 56888 ***
>From gcc-bugs-return-523185-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 09:50:19 2016
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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/70799] STV pass does not convert DImode shifts and rotates
Date: Tue, 26 Apr 2016 09:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70799
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I've been also surprised that the STV pass punts on moves of constants into
DImode registers, if it is not 0, sure, it has higher cost, because it needs to
be loaded from memory, but in the end together with enough other DImode
operations it can be still beneficial.
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Subject: [Bug target/59407] gcc.target/i386/pr58218.c FAILs with Sun as
Date: Tue, 26 Apr 2016 10:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59407
--- Comment #5 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Tue Apr 26 10:06:16 2016
New Revision: 235434
URL: https://gcc.gnu.org/viewcvs?rev=235434&root=gcc&view=rev
Log:
Support .lbss etc. sections with Solaris as (PR target/59407)
PR target/59407
* config/i386/i386.c (SECTION_LARGE): Define.
(x86_64_elf_select_section): Set it for large data/bss sections.
Only clear SECTION_WRITE for .lrodata.
(x86_64_elf_section_type_flags): Set SECTION_LARGE for large
data/bss sections.
* config/i386/sol2.h (MACH_DEP_SECTION_ASM_FLAG): Define.
* varasm.c (default_elf_asm_named_section): Grow flagchars.
[MACH_DEP_SECTION_ASM_FLAG] Emit MACH_DEP_SECTION_ASM_FLAG for
SECTION_MACH_DEP.
* doc/tm.texi.in (Sections, MACH_DEP_SECTION_ASM_FLAG): Describe.
* doc/tm.texi: Regenerate.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/sol2.h
trunk/gcc/doc/tm.texi
trunk/gcc/doc/tm.texi.in
trunk/gcc/varasm.c
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Subject: [Bug target/61821] gcc.target/i386/pr61599-1.c FAILs with Sun as
Date: Tue, 26 Apr 2016 10:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61821
--- Comment #5 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Tue Apr 26 10:10:33 2016
New Revision: 235435
URL: https://gcc.gnu.org/viewcvs?rev=235435&root=gcc&view=rev
Log:
Support .largecomm with Solaris as (PR target/61821)
PR target/61821
* config/i386/i386.c (LARGECOMM_SECTION_ASM_OP): Define default.
(x86_elf_aligned_common): Rename to ...
(x86_elf_aligned_decl_common): ... this.
Add decl arg. Switch to .lbss for largecomm object. Use
LARGECOMM_SECTION_ASM_OP.
* config/i386/i386-protos.h (x86_elf_aligned_common): Reflect
renaming.
* config/i386/x86-64.h (ASM_OUTPUT_ALIGNED_COMMON): Rename to ...
(ASM_OUTPUT_ALIGNED_DECL_COMMON): ... this.
Pass new decl arg.
* config/i386/sol2.h (ASM_OUTPUT_ALIGNED_COMMON): Likewise.
[!USE_GAS] (LARGECOMM_SECTION_ASM_OP): Define.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386-protos.h
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/sol2.h
trunk/gcc/config/i386/x86-64.h
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Subject: [Bug target/61821] gcc.target/i386/pr61599-1.c FAILs with Sun as
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Bug 61821 depends on bug 59407, which changed state.
Bug 59407 Summary: gcc.target/i386/pr58218.c FAILs with Sun as
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59407
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #6 from Rainer Orth <ro at gcc dot gnu.org> ---
Fixed for 7.1.
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Subject: [Bug target/61821] gcc.target/i386/pr61599-1.c FAILs with Sun as
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Target Milestone|5.4 |7.0
--- Comment #6 from Rainer Orth <ro at gcc dot gnu.org> ---
Fixed for 7.1.
>From gcc-bugs-return-523191-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 10:32:36 2016
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/70800] New: libgcc/config/libbid/bid_binarydecimal.c: suspicious comparison ?
Date: Tue, 26 Apr 2016 10:32:00 -0000
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Bug ID: 70800
Summary: libgcc/config/libbid/bid_binarydecimal.c: suspicious
comparison ?
Product: gcc
Version: 6.0
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trunk/libgcc/config/libbid/bid_binarydecimal.c:143934]: (style) Expression '(X
& 0xffff) > 0xf423f' is always false.
Source code is
nan(s,((((x) & 0xFFFFul) > 999999ul) ? 0 : \
(((unsigned long long) x) << 44)),0ull);
Masking something with 0xFFFFul would appear to limit it to [0..64K),
so it should always be < 999999ul.
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Subject: [Bug libstdc++/70794] vector.push_back() crashes with std::bad_alloc after 2^32 calls
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2016-04-26
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can't reproduce this on x86_64 GNU/Linux. I see a very slight pause around
the 4GB mark, and again at 8GB (probably as the allocated pages actually get
touched) but it keeps going well past that. This is a 64GB machine, so it
suggests that the problem is local to your system.
Please provide the missing information requested when you created this bug, see
https://gcc.gnu.org/bugs/
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Subject: [Bug libstdc++/70794] vector.push_back() crashes with std::bad_alloc after 2^32 calls
Date: Tue, 26 Apr 2016 10:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70794
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also, check your 'ulimit -m' value.
>From gcc-bugs-return-523194-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 11:06:41 2016
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Subject: [Bug libstdc++/70794] vector.push_back() crashes with std::bad_alloc after 2^32 calls
Date: Tue, 26 Apr 2016 11:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70794
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And 'ulimit -v'
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Subject: [Bug tree-optimization/70771] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in operator[], at vec.h:714
Date: Tue, 26 Apr 2016 11:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70771
--- Comment #4 from amker at gcc dot gnu.org ---
Author: amker
Date: Tue Apr 26 11:10:47 2016
New Revision: 235436
URL: https://gcc.gnu.org/viewcvs?rev=235436&root=gcc&view=rev
Log:
PR tree-optimization/70771
PR tree-optimization/70775
* tree-if-conv.c (if_convertible_phi_p): Remove check on special
virtual PHI nodes. Delete parameter.
(if_convertible_loop_p_1): Delete argument to above function.
(predicate_all_scalar_phis): Delete code handling single-argument
PHIs.
(tree_if_conversion): Mark and update virtual SSA.
gcc/testsuite/ChangeLog
PR tree-optimization/70771
PR tree-optimization/70775
* gcc.dg/pr70771.c: New test.
* gcc.dg/pr70771.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr70771.c
trunk/gcc/testsuite/gcc.dg/pr70775.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-if-conv.c
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Subject: [Bug tree-optimization/70775] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: Segmentation fault
Date: Tue, 26 Apr 2016 11:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70775
--- Comment #3 from amker at gcc dot gnu.org ---
Author: amker
Date: Tue Apr 26 11:10:47 2016
New Revision: 235436
URL: https://gcc.gnu.org/viewcvs?rev=235436&root=gcc&view=rev
Log:
PR tree-optimization/70771
PR tree-optimization/70775
* tree-if-conv.c (if_convertible_phi_p): Remove check on special
virtual PHI nodes. Delete parameter.
(if_convertible_loop_p_1): Delete argument to above function.
(predicate_all_scalar_phis): Delete code handling single-argument
PHIs.
(tree_if_conversion): Mark and update virtual SSA.
gcc/testsuite/ChangeLog
PR tree-optimization/70771
PR tree-optimization/70775
* gcc.dg/pr70771.c: New test.
* gcc.dg/pr70771.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr70771.c
trunk/gcc/testsuite/gcc.dg/pr70775.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-if-conv.c
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From: "wdijkstr at arm dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/70801] New: IRA caller-saves does not support rematerialization
Date: Tue, 26 Apr 2016 11:28:00 -0000
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Bug ID: 70801
Summary: IRA caller-saves does not support rematerialization
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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Priority: P3
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Target Milestone: ---
GCC emits the same code for caller-saves in all cases, even if the caller-save
is an immediate which can be trivially rematerialized. The caller-save code
should support rematerialization directly by omitting saves and emitting the
init value for restores. This allows the cost of rematerializeable caller-saves
to be lowered and avoids a stack slot.
Alternatively given the spill code already supports rematerialization, it may
be possible to stop immediates from being caller-saved by increasing their
caller-save cost significantly.
void g(void);
float bad_remat(float x)
{
x += 3.0f;
g();
x *= 3.0f;
x *= (3.0f + x);
g();
x *= 3.0f;
x *= (3.0f + x);
return x;
}
AArch64 gives with -O2 -fomit-frame-pointer -ffixed-d8 -ffixed-d9 -ffixed-d10
-ffixed-d11 -ffixed-d12 -ffixed-d13 -ffixed-d14 -ffixed-d15:
fmov s1, 3.0e+0
str x30, [sp, -32]!
fadd s0, s0, s1
stp s0, s1, [sp, 24]
bl g
ldp s0, s1, [sp, 24]
fmul s0, s0, s1
fadd s2, s0, s1
fmul s0, s0, s2
str s0, [sp, 24]
bl g
ldp s0, s1, [sp, 24]
ldr x30, [sp], 32
fmul s0, s0, s1
fadd s1, s0, s1
fmul s0, s0, s1
ret
x86_64 with plain -O2:
subq $24, %rsp
movss .LC0(%rip), %xmm1
addss %xmm1, %xmm0
movss %xmm1, 12(%rsp)
movss %xmm0, 8(%rsp)
call g
movss 8(%rsp), %xmm0
movaps %xmm0, %xmm2
movss 12(%rsp), %xmm1
mulss %xmm1, %xmm2
movaps %xmm2, %xmm0
addss %xmm1, %xmm0
mulss %xmm2, %xmm0
movss %xmm0, 8(%rsp)
call g
movss 12(%rsp), %xmm1
movss 8(%rsp), %xmm0
addq $24, %rsp
mulss %xmm1, %xmm0
addss %xmm0, %xmm1
mulss %xmm1, %xmm0
ret
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70744] preincrements possibly double-evaluated in GNU ternaries
Date: Tue, 26 Apr 2016 11:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70744
--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Apr 26 11:32:26 2016
New Revision: 235438
URL: https://gcc.gnu.org/viewcvs?rev=235438&root=gcc&view=rev
Log:
Bootstrapped/regtested on x86_64-linux, ok for trunk?
2016-04-25 Marek Polacek <polacek@redhat.com>
PR c++/70744
* call.c (build_conditional_expr_1): Call cp_stabilize_reference
instead of stabilize_reference.
(build_over_call): Likewise.
* cp-tree.h (cp_stabilize_reference): Declare.
* tree.c (cp_stabilize_reference): New function.
* typeck.c (cp_build_unary_op): Call cp_stabilize_reference instead of
stabilize_reference.
(unary_complex_lvalue): Likewise.
(cp_build_modify_expr): Likewise.
* g++.dg/ext/cond2.C: New test.
diff --git gcc/cp/call.c gcc/cp/call.c
index 11f2d42..476e806 100644
--- gcc/cp/call.c
+++ gcc/cp/call.c
@@ -4634,7 +4634,7 @@ build_conditional_expr_1 (location_t loc, tree arg1, tree
arg2, tree arg3,
/* Make sure that lvalues remain lvalues. See g++.oliva/ext1.C. */
if (real_lvalue_p (arg1))
- arg2 = arg1 = stabilize_reference (arg1);
+ arg2 = arg1 = cp_stabilize_reference (arg1);
else
arg2 = arg1 = save_expr (arg1);
}
@@ -7644,8 +7644,9 @@ build_over_call (struct z_candidate *cand, int flags,
tsubst_flags_t complain)
|| (TREE_CODE (arg) == TARGET_EXPR
&& !unsafe_copy_elision_p (fa, arg)))
{
- tree to = stabilize_reference (cp_build_indirect_ref (fa, RO_NULL,
- complain));
+ tree to = cp_stabilize_reference (cp_build_indirect_ref (fa,
+ RO_NULL,
+ complain));
val = build2 (INIT_EXPR, DECL_CONTEXT (fn), to, arg);
return val;
@@ -7655,7 +7656,7 @@ build_over_call (struct z_candidate *cand, int flags,
tsubst_flags_t complain)
&& trivial_fn_p (fn)
&& !DECL_DELETED_FN (fn))
{
- tree to = stabilize_reference
+ tree to = cp_stabilize_reference
(cp_build_indirect_ref (argarray[0], RO_NULL, complain));
tree type = TREE_TYPE (to);
tree as_base = CLASSTYPE_AS_BASE (type);
diff --git gcc/cp/cp-tree.h gcc/cp/cp-tree.h
index ec92718..0e46ae1 100644
--- gcc/cp/cp-tree.h
+++ gcc/cp/cp-tree.h
@@ -6494,6 +6494,7 @@ extern cp_lvalue_kind real_lvalue_p
(const_tree);
extern cp_lvalue_kind lvalue_kind (const_tree);
extern bool lvalue_or_rvalue_with_address_p (const_tree);
extern bool xvalue_p (const_tree);
+extern tree cp_stabilize_reference (tree);
extern bool builtin_valid_in_constant_expr_p (const_tree);
extern tree build_min (enum tree_code, tree, ...);
extern tree build_min_nt_loc (location_t, enum tree_code,
diff --git gcc/cp/tree.c gcc/cp/tree.c
index 112c8c7..137186f 100644
--- gcc/cp/tree.c
+++ gcc/cp/tree.c
@@ -296,6 +296,46 @@ xvalue_p (const_tree ref)
return (lvalue_kind (ref) == clk_rvalueref);
}
+/* C++-specific version of stabilize_reference. */
+
+tree
+cp_stabilize_reference (tree ref)
+{
+ switch (TREE_CODE (ref))
+ {
+ /* We need to treat specially anything stabilize_reference doesn't
+ handle specifically. */
+ case VAR_DECL:
+ case PARM_DECL:
+ case RESULT_DECL:
+ CASE_CONVERT:
+ case FLOAT_EXPR:
+ case FIX_TRUNC_EXPR:
+ case INDIRECT_REF:
+ case COMPONENT_REF:
+ case BIT_FIELD_REF:
+ case ARRAY_REF:
+ case ARRAY_RANGE_REF:
+ case COMPOUND_EXPR:
+ case ERROR_MARK:
+ break;
+ default:
+ cp_lvalue_kind kind = lvalue_kind (ref);
+ if ((kind & ~clk_class) != clk_none)
+ {
+ tree type = unlowered_expr_type (ref);
+ bool rval = !!(kind & clk_rvalueref);
+ type = cp_build_reference_type (type, rval);
+ /* This inhibits warnings in, eg, cxx_mark_addressable
+ (c++/60955). */
+ warning_sentinel s (extra_warnings);
+ ref = build_static_cast (type, ref, tf_error);
+ }
+ }
+
+ return stabilize_reference (ref);
+}
+
/* Test whether DECL is a builtin that may appear in a
constant-expression. */
diff --git gcc/cp/typeck.c gcc/cp/typeck.c
index cef5604..7e12009 100644
--- gcc/cp/typeck.c
+++ gcc/cp/typeck.c
@@ -5912,7 +5912,7 @@ cp_build_unary_op (enum tree_code code, tree xarg, int
noconvert,
{
tree real, imag;
- arg = stabilize_reference (arg);
+ arg = cp_stabilize_reference (arg);
real = cp_build_unary_op (REALPART_EXPR, arg, 1, complain);
imag = cp_build_unary_op (IMAGPART_EXPR, arg, 1, complain);
real = cp_build_unary_op (code, real, 1, complain);
@@ -6112,7 +6112,7 @@ unary_complex_lvalue (enum tree_code code, tree arg)
tree lvalue = TREE_OPERAND (arg, 0);
if (TREE_SIDE_EFFECTS (lvalue))
{
- lvalue = stabilize_reference (lvalue);
+ lvalue = cp_stabilize_reference (lvalue);
arg = build2 (TREE_CODE (arg), TREE_TYPE (arg),
lvalue, TREE_OPERAND (arg, 1));
}
@@ -7496,7 +7496,7 @@ cp_build_modify_expr (tree lhs, enum tree_code
modifycode, tree rhs,
case PREINCREMENT_EXPR:
if (TREE_SIDE_EFFECTS (TREE_OPERAND (lhs, 0)))
lhs = build2 (TREE_CODE (lhs), TREE_TYPE (lhs),
- stabilize_reference (TREE_OPERAND (lhs, 0)),
+ cp_stabilize_reference (TREE_OPERAND (lhs, 0)),
TREE_OPERAND (lhs, 1));
newrhs = cp_build_modify_expr (TREE_OPERAND (lhs, 0),
modifycode, rhs, complain);
@@ -7516,7 +7516,7 @@ cp_build_modify_expr (tree lhs, enum tree_code
modifycode, tree rhs,
case MODIFY_EXPR:
if (TREE_SIDE_EFFECTS (TREE_OPERAND (lhs, 0)))
lhs = build2 (TREE_CODE (lhs), TREE_TYPE (lhs),
- stabilize_reference (TREE_OPERAND (lhs, 0)),
+ cp_stabilize_reference (TREE_OPERAND (lhs, 0)),
TREE_OPERAND (lhs, 1));
newrhs = cp_build_modify_expr (TREE_OPERAND (lhs, 0), modifycode, rhs,
complain);
@@ -7665,7 +7665,7 @@ cp_build_modify_expr (tree lhs, enum tree_code
modifycode, tree rhs,
not intervene between the lvalue-to-rvalue conversion and the
side effect associated with any single compound assignment
operator. -- end note ] */
- lhs = stabilize_reference (lhs);
+ lhs = cp_stabilize_reference (lhs);
rhs = rvalue (rhs);
rhs = stabilize_expr (rhs, &init);
newrhs = cp_build_binary_op (input_location,
diff --git gcc/testsuite/g++.dg/ext/cond2.C gcc/testsuite/g++.dg/ext/cond2.C
index e69de29..d9f1d59 100644
--- gcc/testsuite/g++.dg/ext/cond2.C
+++ gcc/testsuite/g++.dg/ext/cond2.C
@@ -0,0 +1,28 @@
+// PR c++/70744
+// { dg-do run }
+// { dg-options "" }
+
+static void
+fn1 (void)
+{
+ int x = 2;
+ ++x ? : 42;
+ if (x != 3)
+ __builtin_abort ();
+ --x ? : 42;
+ if (x != 2)
+ __builtin_abort ();
+ x++ ? : 42;
+ if (x != 3)
+ __builtin_abort ();
+ x-- ? : 42;
+ if (x != 2)
+ __builtin_abort ();
+}
+
+int
+main ()
+{
+ fn1 ();
+ return 0;
+}
Added:
trunk/gcc/testsuite/g++.dg/ext/cond2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/tree.c
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-523199-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 11:35:14 2016
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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++/70744] preincrements possibly double-evaluated in GNU ternaries
Date: Tue, 26 Apr 2016 11:35:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed for GCC 7.
>From gcc-bugs-return-523200-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 11:38:55 2016
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From: "vogt at linux dot vnet.ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/70787] No time and child info with -pg and gccgo
Date: Tue, 26 Apr 2016 11:38:00 -0000
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--- Comment #2 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
The Go runtime seems to register a handler for SIGPROF even if it does not want
to profile. So it always uninstalls the handler installed by Glibc on behalf
of the -pg option. To me it looks like -pg actually enables the profiling from
libgo instead. Some ways to circumvent this:
1) Don't install a SIGPROF handler in the Go runtime if another is already
installed (possibly emit a warning or a fatal error if the program attempts to
enable the Go profiling).
=> Simple to implement.
2) Install the SIGPROF handler on the fly when it's needed instead of
unconditionally at Go runtime startup. Possibly emit a warning if an existing
signal handler is uninstalled in the process.
=> Cleanest solution.
3) Store the previous signal handler and call it at the start of the Go runtime
signal handler. However, this introduces a number several problems (the Go
runtime won't notice if the original profiling code wants to uninstall the
handler or install a new one or it might overwrite the Go runtime handler;
also, the two profiling systems will probably not agree on a common timing
interval).
=> May allow to run Glibc and libgo profiling in parallel but probably has some
unfixable issues.
>From gcc-bugs-return-523201-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 12:13:46 2016
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From: "wdijkstr at arm dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70802] New: IRA memory cost calculation incorrect for immediates
Date: Tue, 26 Apr 2016 12:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70802
Bug ID: 70802
Summary: IRA memory cost calculation incorrect for immediates
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: wdijkstr at arm dot com
Target Milestone: ---
The following code in ira-costs.c tries to improve the memory cost for
rematerializeable loads. There are several issues with this though:
1. The memory cost can become negative, forcing a spill, which is known to
cause incorrect code (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64242)
2. The code only handles a subset of immediate loads, not all rematerializeable
values
3. The cost adjustment is not sufficient to make better decisions between
allocating an immediate to a callee-save register and spill a variable, or
allocate the variable and rematerialize the immediate
As an example of (3), if there is only one callee-save register free, IRA will
use it to allocate the immediate rather than the variable:
float bad_alloc(float x)
{
x += 3.0f;
g();
x *= 3.0f;
return x;
}
With -O2 -fomit-frame-pointer -ffixed-d8 -ffixed-d9 -ffixed-d10 -ffixed-d11
-ffixed-d12 -ffixed-d13 -ffixed-d14:
str x30, [sp, -32]!
str d15, [sp, 8]
fmov s15, 3.0e+0
fadd s0, s0, s15
str s0, [sp, 28]
bl g
ldr s0, [sp, 28]
fmul s0, s0, s15
ldr d15, [sp, 8]
ldr x30, [sp], 32
ret
a0(r76,l0) costs: CALLER_SAVE_REGS:15000,15000 GENERAL_REGS:15000,15000
FP_REGS:0,0 ALL_REGS:15000,15000 MEM:12000,12000
a1(r73,l0) costs: CALLER_SAVE_REGS:10000,10000 GENERAL_REGS:10000,10000
FP_REGS:0,0 ALL_REGS:10000,10000 MEM:8000,8000
The immediate value r76 is counted as 1 def and 2 uses, so memory cost of
12000, while r73 has 1 def and 1 use, so memory cost of 8000. However the
worst-case rematerialization cost of r76 would be 2 moves, one which already
exists of course, so the memory cost should have been 4000...
ira-costs.c, ~line 1458:
if (set != 0 && REG_P (SET_DEST (set)) && MEM_P (SET_SRC (set))
&& (note = find_reg_note (insn, REG_EQUIV, NULL_RTX)) != NULL_RTX
&& ((MEM_P (XEXP (note, 0))
&& !side_effects_p (SET_SRC (set)))
|| (CONSTANT_P (XEXP (note, 0))
&& targetm.legitimate_constant_p (GET_MODE (SET_DEST (set)),
XEXP (note, 0))
&& REG_N_SETS (REGNO (SET_DEST (set))) == 1))
&& general_operand (SET_SRC (set), GET_MODE (SET_SRC (set))))
{
enum reg_class cl = GENERAL_REGS;
rtx reg = SET_DEST (set);
int num = COST_INDEX (REGNO (reg));
COSTS (costs, num)->mem_cost
-= ira_memory_move_cost[GET_MODE (reg)][cl][1] * frequency;
record_address_regs (GET_MODE (SET_SRC (set)),
MEM_ADDR_SPACE (SET_SRC (set)),
XEXP (SET_SRC (set), 0), 0, MEM, SCRATCH,
frequency * 2);
counted_mem = true;
}
>From gcc-bugs-return-523202-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 12:35:43 2016
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Subject: [Bug tree-optimization/70803] New: gcc.dg/vect/pr56625.c FAILs
Date: Tue, 26 Apr 2016 12:35:00 -0000
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Bug ID: 70803
Summary: gcc.dg/vect/pr56625.c FAILs
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: amker at gcc dot gnu.org
Target Milestone: ---
Host: sparc*-sun-solaris2.*
Target: sparc*-sun-solaris2.*
Build: sparc*-sun-solaris2.*
Created attachment 38342
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38342&action=edit
pr56625.c.148t.vect
The new gcc.dg/vect/pr56625.c testcase FAILs on 32 and 64-bit Solaris/SPARC:
FAIL: gcc.dg/vect/pr56625.c -flto -ffat-lto-objects scan-tree-dump-times vect
"vectorized 1 loops" 1
FAIL: gcc.dg/vect/pr56625.c scan-tree-dump-times vect "vectorized 1 loops" 1
I'm attaching the dump.
Rainer
>From gcc-bugs-return-523203-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 12:36:31 2016
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Subject: [Bug tree-optimization/70803] gcc.dg/vect/pr56625.c FAILs
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
>From gcc-bugs-return-523204-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 12:44:30 2016
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From: "bernds at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/57193] [4.9/5/6/7 Regression] suboptimal register allocation for SSE registers
Date: Tue, 26 Apr 2016 12:44:00 -0000
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--- Comment #11 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Author: bernds
Date: Tue Apr 26 12:43:42 2016
New Revision: 235442
URL: https://gcc.gnu.org/viewcvs?rev=235442&root=gcc&view=rev
Log:
Enable -frename-registers at -O2.
PR rtl-optimization/57193
* opts.c (default_options_table): Add OPT_frename_registers at -O2
and above.
* doc/invoke.texi (-frename-registers, -O2): Update documentation.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
trunk/gcc/opts.c
>From gcc-bugs-return-523205-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 13:05:52 2016
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Subject: [Bug tree-optimization/70803] gcc.dg/vect/pr56625.c FAILs
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--- Comment #1 from amker at gcc dot gnu.org ---
Thanks for reporting this, I will check it. Maybe a simple "vect_int_mult" to
skip on some targets.
>From gcc-bugs-return-523206-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 13:07:22 2016
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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++/65734] Yet another case of lost alignment by stor_layout
Date: Tue, 26 Apr 2016 13:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65734
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|6.0 |5.3
>From gcc-bugs-return-523207-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 13:23:47 2016
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From: "david.abdurachmanov at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Tue, 26 Apr 2016 13:23:00 -0000
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--- Comment #12 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
I have re-tested #3 patch by recompiling 316 RPMs (from GCC to our software --
top package). Have not seen those strange segfaults.
>From gcc-bugs-return-523208-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 13:33:30 2016
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From: "ramana at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70804] New: Missed tail-call
Date: Tue, 26 Apr 2016 13:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70804
Bug ID: 70804
Summary: Missed tail-call
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ramana at gcc dot gnu.org
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Given.
struct E {
virtual ~E() { destroy(); }
virtual E *clone() = 0;
void destroy();
};
struct B: public E {
virtual ~B() {}
virtual B *clone() { return 0; }
virtual void bar() {}
};
void f(void) { B b; }
Notice the missing tail call to E:destroy from f.
.file "m.cpp"
.section
.text._ZN1B5cloneEv,"axG",%progbits,_ZN1B5cloneEv,comdat
.align 2
.p2align 3,,7
.weak _ZN1B5cloneEv
.type _ZN1B5cloneEv, %function
_ZN1B5cloneEv:
.LFB8:
.cfi_startproc
mov x0, 0
ret
.cfi_endproc
.LFE8:
.size _ZN1B5cloneEv, .-_ZN1B5cloneEv
.section .text._ZN1B3barEv,"axG",%progbits,_ZN1B3barEv,comdat
.align 2
.p2align 3,,7
.weak _ZN1B3barEv
.type _ZN1B3barEv, %function
_ZN1B3barEv:
.LFB9:
.cfi_startproc
ret
.cfi_endproc
.LFE9:
.size _ZN1B3barEv, .-_ZN1B3barEv
.section .text._ZN1BD2Ev,"axG",%progbits,_ZN1BD5Ev,comdat
.align 2
.p2align 3,,7
.weak _ZN1BD2Ev
.type _ZN1BD2Ev, %function
_ZN1BD2Ev:
.LFB5:
.cfi_startproc
ldr x1, .LC0
str x1, [x0]
b _ZN1E7destroyEv
.cfi_endproc
.LFE5:
.size _ZN1BD2Ev, .-_ZN1BD2Ev
.align 3
.LC0:
.xword _ZTV1E+16
.weak _ZN1BD1Ev
_ZN1BD1Ev = _ZN1BD2Ev
.section .text._ZN1BD0Ev,"axG",%progbits,_ZN1BD5Ev,comdat
.align 2
.p2align 3,,7
.weak _ZN1BD0Ev
.type _ZN1BD0Ev, %function
_ZN1BD0Ev:
.LFB7:
.cfi_startproc
stp x19, x30, [sp, -16]!
.cfi_def_cfa_offset 16
.cfi_offset 19, -16
.cfi_offset 30, -8
ldr x1, .LC1
mov x19, x0
str x1, [x0]
bl _ZN1E7destroyEv
mov x0, x19
ldp x19, x30, [sp], 16
.cfi_restore 30
.cfi_restore 19
.cfi_def_cfa_offset 0
b _ZdlPv
.cfi_endproc
.LFE7:
.size _ZN1BD0Ev, .-_ZN1BD0Ev
.align 3
.LC1:
.xword _ZTV1E+16
.text
.align 2
.p2align 3,,7
.global _Z1fv
.type _Z1fv, %function
_Z1fv:
.LFB10:
.cfi_startproc
str x30, [sp, -32]!
.cfi_def_cfa_offset 32
.cfi_offset 30, -32
ldr x1, .LC2
add x0, sp, 32
str x1, [x0, -8]!
bl _ZN1E7destroyEv
ldr x30, [sp], 32
.cfi_restore 30
.cfi_def_cfa_offset 0
ret
.cfi_endproc
.LFE10:
.size _Z1fv, .-_Z1fv
.align 3
.LC2:
.xword _ZTV1E+16
.weak _ZTS1E
.section .rodata._ZTS1E,"aG",%progbits,_ZTS1E,comdat
.align 3
.type _ZTS1E, %object
.size _ZTS1E, 3
_ZTS1E:
.string "1E"
.weak _ZTI1E
.section .rodata._ZTI1E,"aG",%progbits,_ZTI1E,comdat
.align 3
.type _ZTI1E, %object
.size _ZTI1E, 16
_ZTI1E:
.xword _ZTVN10__cxxabiv117__class_type_infoE+16
.xword _ZTS1E
.weak _ZTV1E
.section .rodata._ZTV1E,"aG",%progbits,_ZTV1E,comdat
.align 3
.type _ZTV1E, %object
.size _ZTV1E, 40
_ZTV1E:
.xword 0
.xword _ZTI1E
.xword 0
.xword 0
.xword __cxa_pure_virtual
>From gcc-bugs-return-523209-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 13:33:48 2016
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From: "ramana at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70804] Missed tail-call
Date: Tue, 26 Apr 2016 13:33:00 -0000
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |aarch64
--- Comment #1 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Update target
>From gcc-bugs-return-523210-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 13:42:16 2016
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From: "graham.frye at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/21057] iso C99 complex double: problems with g++
Date: Tue, 26 Apr 2016 13:42:00 -0000
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Graham Frye <graham.frye at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |graham.frye at hotmail dot com
--- Comment #5 from Graham Frye <graham.frye at hotmail dot com> ---
Created attachment 38343
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38343&action=edit
stack misalignment using complex<double>
#include <complex>
#include <iostream>
//changes
typedef std::complex<double> Cx;
Cx foo(int kojack)
{
double x=3, y=kojack;
return (x, y);
}
int main(int argc, char *argv[])
{
Cx z1(3.0, 4.0);
Cx z2(foo(4));
std::cout << "z1=" << z1 << std::endl;
std::cout << "z2=" << z2 << std::endl;
// compiled with gcc 4.8.4 on lxle
// g++ -o bug bug.cpp
//output:
//z1=(3,4)
//z2=(4,0)
}
////////////end
>From gcc-bugs-return-523212-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 13:50:58 2016
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70797] gcc.exe: Internal compiler error: (program as)
Date: Tue, 26 Apr 2016 13:50:00 -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 |target
Severity|critical |normal
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Something in your installation is wrong, then, but it's hard to say anything
without more details. Anyway, hardly a C FE issue.
>From gcc-bugs-return-523211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 13:50:36 2016
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/70805] New: libgomp.c/for-5.c and libgomp.c++/for-13.C FAIL
Date: Tue, 26 Apr 2016 13:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70805
Bug ID: 70805
Summary: libgomp.c/for-5.c and libgomp.c++/for-13.C FAIL
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgomp
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
Target Milestone: ---
Host: sparc*-sun-solaris2.*
Target: sparc*-sun-solaris2.*
Build: sparc*-sun-solaris2.*
The libgomp.c/for-5.c and libgomp.c++/for-13.C tests FAIL on 1.2 GHz UltraSPARC
T2
systems running Solaris 1[0-2]:
WARNING: program timed out.
FAIL: libgomp.c/for-5.c (test for excess errors)
WARNING: libgomp.c/for-5.c compilation failed to produce executable
WARNING: program timed out.
FAIL: libgomp.c++/for-13.C (test for excess errors)
WARNING: libgomp.c++/for-13.C compilation failed to produce executable
It turns out that even on an otherwise idle system, compilation times are
dangerously close to the default testcase timeout of 300s:
real 3:28.01
user 3:25.67
sys 0.71
real 3:30.60
user 3:27.88
sys 0.71
On a 2.27 GHz Xeon X5520, I get instead:
real 30.12
user 28.59
sys 0.38
real 30.65
user 28.93
sys 0.39
I long didn't noticed this because I had doubled the default timeout to 600 s,
but those two tests are almost the only ones where this makes a difference.
I wonder if one should either use dg-timeout-factor 2 or something else.
Rainer
>From gcc-bugs-return-523213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 13:51:09 2016
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Subject: [Bug libgomp/70805] libgomp.c/for-5.c and libgomp.c++/for-13.C FAIL
Date: Tue, 26 Apr 2016 13:51:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
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>From gcc-bugs-return-523214-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 13:52:30 2016
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Subject: [Bug c/70753] missing diagnostic in C11 mode: sizeof, _Alignof of function type
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
.
>From gcc-bugs-return-523216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 14:02:54 2016
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/51153] OpenACC implementation
Date: Tue, 26 Apr 2016 14:02:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
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--- Comment #6 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to Tobias Burnus from comment #4)
> The basic implementation is now (= GCC 5) in:
> See also https://gcc.gnu.org/wiki/OpenACC
Compared to GCC 5, the GCC 6 release series includes a much improved
implementation of the OpenACC 2.0a specification. See
<https://gcc.gnu.org/gcc-6/changes.html> or the OpenACC wiki page for a
high-level overview.
> I think this PR can now be closed
> and instead one could concentrate on the remaining issues elsewhere (PRs
> with 'openacc' keyword, pending patches).
ACK.
>From gcc-bugs-return-523215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 14:02:43 2016
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Subject: [Bug c/70791] -Wnested-externs prints inconsistent column number
Date: Tue, 26 Apr 2016 14:02:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-26
CC| |mpolacek at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
Target Milestone|--- |7.0
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Patch should be trivial.
>From gcc-bugs-return-523217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 14:06:59 2016
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Subject: [Bug c++/70495] false warning: comparison between signed and unsigned integer expressions
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András <andras.szilard at gmail dot com> changed:
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--- Comment #7 from András <andras.szilard at gmail dot com> ---
Presents in latest GCC/C++.
https://gcc.godbolt.org/#compilers:!((compiler:g6,options:'-Wall',sourcez:MQSwdgxgNgrgJgUwAQB4IGcAudyYHwBQBuSAtgIbgAUuANEhABbkBOAVANoC6AlAQN4EkwpDFwBmAEwB9TEnJIAvEgAMAbiEixYTAA5ZSAEZLVGzcJAAzJFQUojPJP2EB6F0jAB7JAHdWYcABzcxFhFgRMGBYwJABGDVCAXyJQqxs7IyQAagcnV3cvX38gkNDwyOikSQSRZNCQtNtUTJzjVsdnJDckQKycwJAANwR0IuiggC4GT1IAB1YQdE8YwwifBAQY9BBAsAQ4eTADmDBt3f2kXARAhBYkBAAPWfD0beX0UpFyqJjxGuFkiFuj5PCwANasTwnA7AWINaxNexYciYEAQaQQchYFDaPSyPBUNotBwdfIebx%2BcZgYKhMoRH5IP4hQGhYGgiEsKFHJDASTw9LNZGo9GY7G4/T4QnZXLtPJdAoU4rUz5hemVJlJFIibpYFjkanIEHgyHQnlw1IIjJE63SlQwUny8ljALK2lfNUxAAs/yQLO17l1%2BpuvnZJu5vP5iOJNpysRgSAAtHF7XLuoVKS6aW6kN9Kt7mVrVRUYuoCMkgAA%3D%3D)),filterAsm:(colouriseAsm:!t,commentOnly:!t,directives:!t,labels:!t),version:3
>From gcc-bugs-return-523218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 14:15:54 2016
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From: "emil.styrke at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70806] New: Missing deallocation of exception handler emergency pool breaks -static-libstdc++ with dlopen
Date: Tue, 26 Apr 2016 14:15:00 -0000
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Bug ID: 70806
Summary: Missing deallocation of exception handler emergency
pool breaks -static-libstdc++ with dlopen
Product: gcc
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There are multiple reports of benign "memory leaks" (still reachable bytes) in
eh_alloc.c, for example https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65434.
And even a request for a hook to manually deallocate this memory in valgrind
and similar tools:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69945
However, my use case is slightly different: Firstly, I build dynamic libraries
with -static-libstdc++ to be able to run on systems with libstdc++ older than
on the build machine. Secondly, I load such libraries as plugins with
dlopen/dlclose. This works fine in GCC 4.9, but leaks memory in GCC 5.
Each time the library is dlopened a new pool object is created, and after
dlclose it will not have any references left. Valgrind shows this (after
looping the dlopen/dlsym/dlclose part a few times):
==3679== 3,707,904 bytes in 51 blocks are definitely lost in loss record 106 of
106
==3679== at 0x4C2BBCF: malloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==3679== by 0x77335EF: _GLOBAL__sub_I_eh_alloc.cc (in
[...]/libmock_di_plugin.so)
==3679== by 0x40105B9: call_init.part.0 (dl-init.c:72)
==3679== by 0x40106CA: call_init (dl-init.c:30)
==3679== by 0x40106CA: _dl_init (dl-init.c:120)
==3679== by 0x4015586: dl_open_worker (dl-open.c:579)
==3679== by 0x4010463: _dl_catch_error (dl-error.c:187)
==3679== by 0x40149A2: _dl_open (dl-open.c:663)
==3679== by 0x6B94FC8: dlopen_doit (dlopen.c:66)
==3679== by 0x4010463: _dl_catch_error (dl-error.c:187)
==3679== by 0x6B9562C: _dlerror_run (dlerror.c:163)
==3679== by 0x6B95060: dlopen@@GLIBC_2.2.5 (dlopen.c:87)
==3679== by 0x4F303E6: load_library (dipluginhandlerimpl.cpp:60)
Is there any solution to this, other than me manually calling
__gnu_cxx::__freeres (mentioned in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69945) before calling dlclose?
>From gcc-bugs-return-523219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 14:31:19 2016
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/70786] Missing "not" breaks Ada.Text_IO.Get_Immediate(File, Item, Available)
Date: Tue, 26 Apr 2016 14:31:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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Last reconfirmed| |2016-04-26
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--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Ouch. Thanks for reporting the issue and providing the fix.
>From gcc-bugs-return-523220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 14:39:50 2016
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Subject: [Bug c++/70796] [DR 1030] Initialization order with braced-init-lists still broken
Date: Tue, 26 Apr 2016 14:39:00 -0000
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Jason Turner <lefticus at gmail dot com> changed:
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--- Comment #1 from Jason Turner <lefticus at gmail dot com> ---
Also related: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70792
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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/67784] Incorrect parsing when using declarations in for loops and typedefs
Date: Tue, 26 Apr 2016 15:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67784
--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Apr 26 14:59:40 2016
New Revision: 235446
URL: https://gcc.gnu.org/viewcvs?rev=235446&root=gcc&view=rev
Log:
PR c/67784
* c-parser.c (c_parser_maybe_reclassify_token): New function factored
out of ...
(c_parser_for_statement): ... here.
(c_parser_if_statement): Use it.
(c_parser_switch_statement): Use it.
(c_parser_while_statement): Use it.
* gcc.dg/pr67784-3.c: New test.
* gcc.dg/pr67784-4.c: New test.
* gcc.dg/pr67784-5.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr67784-3.c
trunk/gcc/testsuite/gcc.dg/pr67784-4.c
trunk/gcc/testsuite/gcc.dg/pr67784-5.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-parser.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-523223-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 15:01:50 2016
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Subject: [Bug c/70791] -Wnested-externs prints inconsistent column number
Date: Tue, 26 Apr 2016 15:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70791
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Apr 26 15:01:09 2016
New Revision: 235447
URL: https://gcc.gnu.org/viewcvs?rev=235447&root=gcc&view=rev
Log:
PR c/70791
* c-decl.c (pushdecl): Pass LOCUS down to warning.
* gcc.dg/Wnested-externs-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/Wnested-externs-2.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/testsuite/ChangeLog
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70807] New: fwprop pass doesn't with incoming CDI_DOMINATORS
Date: Tue, 26 Apr 2016 15:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70807
Bug ID: 70807
Summary: fwprop pass doesn't with incoming CDI_DOMINATORS
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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When
calculate_dominance_info (CDI_DOMINATORS);
is called before fwprop pass, fwprop pass will ICE if
free_dominance_info (CDI_DOMINATORS);
isn't called before fwprop pass:
https://gcc.gnu.org/ml/gcc/2016-03/msg00143.html
I will provide a patch to trigger ICE in libgcc build on x86-64
after PR target/70155 is fixed.
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Subject: [Bug c/67784] Incorrect parsing when using declarations in for loops and typedefs
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
--- Comment #12 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed again.
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Subject: [Bug c/70791] -Wnested-externs prints inconsistent column number
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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> ---
Fixed.
>From gcc-bugs-return-523226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 15:47:06 2016
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From: "lucdanton at free dot fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70808] New: Spurious -Wzero-as-null-pointer-constant for nullptr_t
Date: Tue, 26 Apr 2016 15:47:00 -0000
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Bug ID: 70808
Summary: Spurious -Wzero-as-null-pointer-constant for nullptr_t
Product: gcc
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The following program emits a warning when compiled with
-Wzero-as-null-pointer-constant:
int main()
{
int* no_warn = {};
// main.cpp:5:33: warning: zero as null pointer constant
[-Wzero-as-null-pointer-constant]
decltype( nullptr ) warn = {};
}
Unless I'm mistaken, this is not intended as demonstrated by the innocuous
no_warn variable.
Happens on a variety of versions, e.g. 5.3.1 and 6, as well as multiple -std
settings, e.g. c++11 and c++1z.
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
Date: Tue, 26 Apr 2016 15:57:00 -0000
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--- Comment #15 from amker at gcc dot gnu.org ---
Also the case is reported not vectorized on Solaris/SPARC in PR70803. I will
investigate and follow up it in that ticket.
Thanks.
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Subject: [Bug c/70791] -Wnested-externs prints inconsistent column number
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--- Comment #4 from Eric Gallager <egall at gwmail dot gwu.edu> ---
(In reply to Marek Polacek from comment #3)
> Fixed.
Thanks for the speedy response and fix!
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Subject: [Bug libstdc++/69945] Provide an equivalent of __libc_freeres to release emergency EH pool memory
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69945
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-26
Known to work| |6.0
Ever confirmed|0 |1
>From gcc-bugs-return-523230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 17:04:24 2016
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From: "jgreenhalgh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70809] New: [AArch64] aarch64_vmls pattern should be rejected if -ffp-contract=off
Date: Tue, 26 Apr 2016 17:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70809
Bug ID: 70809
Summary: [AArch64] aarch64_vmls pattern should be rejected if
-ffp-contract=off
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jgreenhalgh at gcc dot gnu.org
Target Milestone: ---
Target: aarch64*-*-*
Take this simple testcase:
void
foo (float * __restrict__ __attribute__ ((aligned (16))) a,
float * __restrict__ __attribute__ ((aligned (16))) x,
float * __restrict__ __attribute__ ((aligned (16))) y,
float * __restrict__ __attribute__ ((aligned (16))) z)
{
unsigned i = 0;
for (i = 0; i < 256; i++)
a[i] = x[i] - (y[i] * z[i]);
}
GCC for AArch64 (all versions) will generate a vectorized fmls instruction even
when given the --fp-contract=off command (for trunk and 6 you'll need to play
with -mcpu options to find one which permits the combine through the cost
model):
(for trunk) $ gcc -O3 -ffp-contract=off -mcpu=xgene1 foo.c
<snip>
.L4:
ldr q2, [x9, x4]
add w5, w5, 1
ldr q1, [x8, x4]
cmp w5, w7
ldr q0, [x10, x4]
fmls v0.4s, v2.4s, v1.4s
str q0, [x6, x4]
add x4, x4, 16
bcc .L4
<snip>
The problem seems pretty clear, the aarch64_vmls<mode> pattern needs to be
tightened up not to fuse multiplies and subtracts when we're not in
-ffp-contract=fast.
(define_insn "aarch64_vmls<mode>"
[(set (match_operand:VDQF 0 "register_operand" "=w")
(minus:VDQF (match_operand:VDQF 1 "register_operand" "0")
(mult:VDQF (match_operand:VDQF 2 "register_operand" "w")
(match_operand:VDQF 3 "register_operand"
"w"))))]
"TARGET_SIMD"
"fmls\\t%0.<Vtype>, %2.<Vtype>, %3.<Vtype>"
[(set_attr "type" "neon_fp_mla_<Vetype>_scalar<q>")]
)
>From gcc-bugs-return-523231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 17:16:10 2016
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Subject: [Bug c++/70810] New: std::function template variadic template arguments do not unpack in function template
Date: Tue, 26 Apr 2016 17:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70810
Bug ID: 70810
Summary: std::function template variadic template arguments do
not unpack in function template
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: sd.foolegg at gmail dot com
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std::function template variadic template arguments do not unpack in function
template, like this:
template<typename ... Ts>
void invoke(std::function<void(Ts ...)> f, Ts ... args) {}
void foo(std::string s, int i) {}
invoke<std::string, int>(foo, "a", 1); // fail
// mismatched types 'std::function<void(Ts ...)>' and 'void
(*)(std::__cxx11::string, int) {aka void (*)(std::__cxx11::basic_string<char>,
int)}'
full code :
#include <iostream>
#include <functional>
template<typename ... Ts>
struct Invoker {
void invoke(std::function<void(Ts ...)> f, Ts ... args) {
f(args ...);
}
};
template<typename ... Ts>
void invoke(std::function<void(Ts ...)> f, Ts ... args) {
f(args ...);
}
void foo(std::string s, int i) {
std::cout << "foo " << s << " " << i << std::endl;
}
int main() {
Invoker<std::string, int> invoker;
invoker.invoke(foo, "a", 1); // ok
invoke<std::string, int>(foo, "a", 1); // fail
return 0;
}
main.cc:24:41: note: mismatched types 'std::function<void(Ts ...)>' and 'void
(*)(std::__cxx11::string, int) {aka void (*)(std::__cxx11::basic_string<char>,
int)}'
gcc version 5.3.1 20160301 [gcc-5-branch revision 233849] (SUSE Linux)
>From gcc-bugs-return-523232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 17:19:19 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70809] [AArch64] aarch64_vmls pattern should be rejected if -ffp-contract=off
Date: Tue, 26 Apr 2016 17:19:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-26
CC| |ktkachov at gcc dot gnu.org
Target Milestone|--- |4.9.5
Ever confirmed|0 |1
Known to fail| |4.8.5, 4.9.4, 5.3.1, 6.0,
| |7.0
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed on all branches (hence not a regression).
For 4.9 and earlier (where there's no -mtune=xgene1) I see the fmls with
-mtune=generic
>From gcc-bugs-return-523233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 17:51:07 2016
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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/70772] Wrong warning about unspecified behavior for comparison with string literal
Date: Tue, 26 Apr 2016 17:51:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
This bug affects both the C and the C++ front ends. I mention it because when
developing a patch, it would be worth fixing both, and handle other equality
and relational operators, as well as the substraction expression. Since the C
rules are different than C++, the handling needs to be different for each
language.
The test case below shows the problems in C and documents the expected output
in C++. Note that even in cases where a diagnostic is expected and issued, the
text of the diagnostic should change to reflect what the relevant standard says
(undefined behavior in C rather than unspecified). Unlike in C, in C++, the
behavior of relational expressions is well defined even for pointers pointing
to different objects provided one compares either less that or equal to the
other (it is unspecified otherwise), so the text of the diagnostic should be
adjusted to reflect that.
$ cat v.c && gcc -S -Wall -Wextra -Wpedantic -xc v.c
void f (void)
{
const __PTRDIFF_TYPE__ a[] = {
"a" == "b", // no warning expected (behavior well defined)
"a" != "b", // no warning expected (behavior well defined)
"a" < "b", // warning expected in C only (undefined behavior)
"a" <= "b", // warning expected in C only (undefined behavior)
"a" > "b", // warning expected in C only (undefined behavior)
"a" >= "b", // warning expected in C only (undefined behavior)
"a" - "b" // warning expected (undefined behavior)
};
(void)a;
}
v.c: In function ‘f’:
v.c:4:9: warning: comparison with string literal results in unspecified
behavior [-Waddress]
"a" == "b", // no warning expected (behavior well defined)
^~
v.c:5:9: warning: comparison with string literal results in unspecified
behavior [-Waddress]
"a" != "b", // no warning expected (behavior well defined)
^~
v.c:6:9: warning: comparison with string literal results in unspecified
behavior [-Waddress]
"a" < "b", // warning expected in C only (undefined behavior)
^
v.c:7:9: warning: comparison with string literal results in unspecified
behavior [-Waddress]
"a" <= "b", // warning expected in C only (undefined behavior)
^~
v.c:8:9: warning: comparison with string literal results in unspecified
behavior [-Waddress]
"a" > "b", // warning expected in C only (undefined behavior)
^
v.c:9:9: warning: comparison with string literal results in unspecified
behavior [-Waddress]
"a" >= "b", // warning expected in C only (undefined behavior)
^~
>From gcc-bugs-return-523234-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 18:25:26 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/70811] New: error on #pragma GCC diagnostic in an enum
Date: Tue, 26 Apr 2016 18:25:00 -0000
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Bug ID: 70811
Summary: error on #pragma GCC diagnostic in an enum
Product: gcc
Version: 6.0
Status: UNCONFIRMED
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Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
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GCC gives a syntax error when #pragma GCC diagnostic appears in the
enumeraror-list of a definition of an enumerator (for example, when attempting
to suppress a warning about the constant-expression used to assign to one of
the enumerators, as in the example below). GCC does not give an error when
#pragma push_macro is used in the same place.
I couldn't find anything about this limitation in the manual. If it is a known
limitation or one that cannot be fixed the manual should be updated to mention
it. AFAICS, the C standard allows implementations to fail to translate
programs with implementation-defined pragmas but it does require them to
document this (implementation-defined) behavior.
$ cat -n v.c && /home/msebor/build/gcc-trunk-git/gcc/xgcc
-B/home/msebor/build/gcc-trunk-git/gcc -S -Wall -Wextra -Wpedantic -xc v.c
1 enum E
2 {
3 e = "a" - "a"
4 };
5
6 enum F
7 {
8 #pragma GCC diagnostic ignored "-Waddress"
9 f = "b" - "b"
10 };
11
v.c:3:9: warning: enumerator value for ‘e’ is not an integer constant
expression [-Wpedantic]
e = "a" - "a"
^~~
v.c:8:9: error: expected identifier before ‘#pragma’
#pragma GCC diagnostic ignored "-Waddress"
^~~
>From gcc-bugs-return-523235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 18:29:34 2016
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Subject: [Bug c/70811] error on #pragma GCC diagnostic in an enum
Date: Tue, 26 Apr 2016 18:29:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|preprocessor |c
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The preprocessor is not involved in this case, it just passes down #pragma to
the C/C++ front-end. Does C++ front-end fail too?
>From gcc-bugs-return-523236-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 19:08:50 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70811] error on #pragma GCC diagnostic in an enum
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic, rejects-valid
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
G++ gives several errors. The first one is more meaningful than the one issued
by GCC. The rest suggest it's too confused to gracefully recover.
FWIW, I wonder if it would be worth adding a c-c++ Component to Bugzilla for
reports that affect both front ends but that might need a separate fix in each.
(Not sure if this is one such case but I know there are some.)
$ cat -n v.c && /home/msebor/build/gcc-trunk-git/gcc/xgcc
-B/home/msebor/build/gcc-trunk-git/gcc -S -Wall -Wextra -Wpedantic -xc++ v.c
1 enum E
2 {
3 #pragma GCC diagnostic push
4 e
5 };
v.c:3:9: error: ‘#pragma’ is not allowed here
#pragma GCC diagnostic push
^~~
v.c:4:5: error: expected ‘}’ before ‘e’
e
^
v.c:5:3: error: expected initializer before ‘}’ token
};
^
v.c:5:3: error: expected declaration before ‘}’ token
>From gcc-bugs-return-523237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 20:01:57 2016
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70812] New: Delay folding in C front-end
Date: Tue, 26 Apr 2016 20:01:00 -0000
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Bug ID: 70812
Summary: Delay folding in C front-end
Product: gcc
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Hello,
gcc.dg/gomp/loop-1.c recently gained a few xfails
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg01417.html
Those happen because the C front-end folds i+=i to i*=2 before the OMP code has
a chance to check if the increment has a supported form. I think the problem
only happens for forms which are invalid anyway.
If you believe the behavior is fine, then we could update the testcase so the
xfails become passes.
>From gcc-bugs-return-523238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 20:06:48 2016
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Subject: =?UTF-8?B?W0J1ZyBjLzcwODEzXSBOZXc6IFdyb25nIHdhcm5pbmcgIicwJyBmbGFnIGln?= =?UTF-8?B?bm9yZWQgd2l0aCBwcmVjaXNpb24gYW5kIOKAmCVk4oCZIGdudV9wcmludGYg?= =?UTF-8?B?Zm9ybWF0Ig==?Date: Tue, 26 Apr 2016 20:06:00 -0000
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Bug ID: 70813
Summary: Wrong warning "'0' flag ignored with precision and
‘%d’ gnu_printf format"
Product: gcc
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When compiling this program:
#include <stdio.h>
int main()
{
printf("abc"
"%05.*d\n", -1, 1);
}
I get the following error message:
example.c: In function ‘main’:
example.c:5:10: warning: '0' flag ignored with precision and ‘%d’ gnu_printf
format [-Wformat=]
printf("abc"
^~~~~
The output from the program:
abc00001
There are two issues here.
1. Wrong position for the warning.
2. The warning itself is wrong in this corner case. Yes, '0' flag is ordinarily
ignored with precision and %d per C11, 7.21.6.1p6: "For d, i, o, u, x, and X
conversions, if a precision is specified, the 0 flag is ignored." But the
precision is negative here and C11, 7.21.6.1p5, reads: "A negative precision
argument is taken as if the precision were omitted."
The output from the program demonstrates that indeed '0' flag is not ignored.
Maybe it's better to limit this warning to cases where precision is known at
compile time (e.g., for simplicity, when it's not '*')?
This gcc bug was pointed out to me in
https://twitter.com/spun_off/status/723558401599524865 .
>From gcc-bugs-return-523239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 20:38:47 2016
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Subject: [Bug c/70812] Delay folding further in C front-end
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Summary|Delay folding in C |Delay folding further in C
|front-end |front-end
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The folding is delayed, just not enough it seems.
>From gcc-bugs-return-523240-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 20:57:59 2016
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Subject: [Bug debug/51358] incorrect/missing location for function arg, -O0, without VTA
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--- Comment #12 from Mark Wielaard <mark at gcc dot gnu.org> ---
Having to parse line information to skip the prologue us somewhat inconvenient.
Especially since GCC doesn't actually emit DW_LNS_set_prologue_end, you have to
use some heuristic to determine whether you have reach the end of the prologue.
As an alternative it might be nice if GCC could emit a
DW_AT_GNU_entry_breakpoint that indicates where the "valid scope" of the
function starts (it could either be an address or a constant to be added to
low_pc).
>From gcc-bugs-return-523241-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 21:12:10 2016
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Subject: [Bug libstdc++/70794] vector.push_back() crashes with std::bad_alloc after 2^32 calls
Date: Tue, 26 Apr 2016 21:12:00 -0000
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--- Comment #4 from numien at deathwyrm dot com ---
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/5.3.1/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 5.3.1 20151207 (Red Hat 5.3.1-2) (GCC)
$ ulimit -m
unlimited
$ ulimit -v
unlimited
$ g++ -m64 -O2 -save-temps -o test test.cpp
(no output)
$ ./test
Reported max: 18446744073709551615
4294932terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
4294967297
Aborted (core dumped)
Preprocessed source attached... just in case my headers are different from the
standard somehow. It's certainly possible that the problem is local to my
system, though I'm not sure why it would be, it's a pretty average setup.
>From gcc-bugs-return-523242-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 21:12:51 2016
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Subject: [Bug libstdc++/70794] vector.push_back() crashes with std::bad_alloc after 2^32 calls
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--- Comment #5 from numien at deathwyrm dot com ---
Created attachment 38344
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38344&action=edit
Preprocessed source
>From gcc-bugs-return-523243-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 21:40:35 2016
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Subject: [Bug target/70814] New: atomic store of __int128 is not lock free on aarch64
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Bug ID: 70814
Summary: atomic store of __int128 is not lock free on aarch64
Product: gcc
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`std::atomic<__int128>::store` on aarch64 is not lock free and generates a
function call `__atomic_store_16`. However, required atomic instructions
(`stlxp`) exists in armv8 and is used by clang. Should gcc use the same
instruction as well?
Ref https://llvm.org/bugs/show_bug.cgi?id=27081, which fixes the clang codegen
for this case.
>From gcc-bugs-return-523244-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 22:18:51 2016
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70815
Bug ID: 70815
Summary: ICE when using read statement applied to
deferred-length string pointer as derived type
component
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: pvdp.bugzilla at gmail dot com
Target Milestone: ---
Read statements applied to deferred-length string pointers inside derived types
cause an ICE if upper bound is omitted.
EXAMPLE:
program mwe
implicit none
type tStruc
character(len=:),pointer :: str
end type tStruc
type(tStruc) :: t
character(len=300),target :: buffer
character(len=:),pointer :: strptr
integer :: i, j, k
buffer = "10 11 12"
t%str => buffer
strptr => buffer
read(t%str(3:),*) j ! <-- causes ICE
read(t%str(3:len(t%str)),*) j ! <-- work-around
read(buffer(3:),*) i ! works
read(strptr(3:),*) k ! works
print *, i,j,k
end program
ICE REPORT MINGW:
f951.exe: out of memory allocating 1718048288 bytes
ICE REPORT LINUX:
f951: internal compiler error: Segmentation fault
0xa3e2ef crash_signal
../../src/gcc/toplev.c:383
0x5f375e gfc_copy_shape(__mpz_struct (*) [1], int)
../../src/gcc/fortran/expr.c:708
0x5f3805 gfc_copy_expr(gfc_expr*)
../../src/gcc/fortran/expr.c:393
0x64dbb7 gfc_resolve_substring_charlen(gfc_expr*)
../../src/gcc/fortran/resolve.c:4575
0x64b555 gfc_resolve_expr(gfc_expr*)
../../src/gcc/fortran/resolve.c:6262
0x612926 gfc_resolve_dt(gfc_dt*, locus*)
../../src/gcc/fortran/io.c:2915
0x652967 gfc_resolve_code(gfc_code*, gfc_namespace*)
../../src/gcc/fortran/resolve.c:10375
0x654932 resolve_codes
../../src/gcc/fortran/resolve.c:15057
0x654a21 gfc_resolve(gfc_namespace*)
../../src/gcc/fortran/resolve.c:15091
0x6402ba resolve_all_program_units
../../src/gcc/fortran/parse.c:5282
0x6402ba gfc_parse_file()
../../src/gcc/fortran/parse.c:5525
0x67f9d5 gfc_be_parse_file
../../src/gcc/fortran/f95-lang.c:229
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
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Subject: [Bug c++/70241] Enumerators introduced out-of-line by extending an opaque enum definition always get private accessibility
Date: Tue, 26 Apr 2016 22:25:00 -0000
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--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Author: ppalka
Date: Tue Apr 26 22:24:43 2016
New Revision: 235456
URL: https://gcc.gnu.org/viewcvs?rev=235456&root=gcc&view=rev
Log:
Fix PR c++/70241 (inconsistent access with in-class enumeration)
gcc/cp/ChangeLog:
PR c++/70241
* decl.c (build_enumerator): Set current_access_specifier when
declaring an enumerator belonging to an in-class enumeration.
* parser.c (cp_parser_check_access_in_redecleration): Also
consider in-class enumerations.
gcc/testsite/ChangeLog:
PR c++/70241
* g++.dg/cpp0x/enum32.C: New test.
* g++.dg/cpp0x/enum33.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/enum32.C
trunk/gcc/testsuite/g++.dg/cpp0x/enum33.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/66639] declare __func__ , __FUNCTION__ & __PRETTY_FUNCTION__ as constexpr
Date: Tue, 26 Apr 2016 22:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66639
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue Apr 26 22:57:34 2016
New Revision: 235458
URL: https://gcc.gnu.org/viewcvs?rev=235458&root=gcc&view=rev
Log:
PR c++/66639 - declare __func__ , __FUNCTION__ & __PRETTY_FUNCTION__ constexpr
* g++.dg/cpp1y/func_constexpr.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/func_constexpr.C
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-523247-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Apr 26 22:59:08 2016
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Subject: [Bug c++/66639] declare __func__ , __FUNCTION__ & __PRETTY_FUNCTION__ as constexpr
Date: Tue, 26 Apr 2016 22:59:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Looks like this has been implemented/fixed.
>From gcc-bugs-return-523248-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 00:00:58 2016
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Subject: [Bug c++/66561] __builtin_LINE at al. should yield constant expressions
Date: Wed, 27 Apr 2016 00:00:00 -0000
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch posted for review:
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg01565.html
>From gcc-bugs-return-523249-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 01:51:21 2016
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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++/70816] New: bogus error __builtin_strcmp is not a constant expression in a constexpr function
Date: Wed, 27 Apr 2016 01:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70816
Bug ID: 70816
Summary: bogus error __builtin_strcmp is not a constant
expression in a constexpr function
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
G++ accepts most calls to __builtin_strcmp with constant arguments in constexpr
contexts, except when the intrinsic is invoked on local arrays defined in a
constexpr function. The test case below shows a number of accepted calls along
with the one that's incorrectly rejected.
$ cat u.c && /home/msebor/build/gcc-trunk-git/gcc/xgcc
-B/home/msebor/build/gcc-trunk-git/gcc -Wall -Wextra -Wpedantic -xc++ u.c
constexpr int f0 ()
{
return __builtin_strcmp ("a", "b");
}
constexpr int f1 ()
{
const char a [] = "a";
const char b [] = "b";
return __builtin_strcmp (a, b);
}
constexpr int f2 (const char *a, const char *b)
{
int d = 0;
do {
d = *b - *a;
} while (*a++ && *b++);
return d;
}
constexpr int f3 ()
{
const char s [] = "a";
const char t [] = "b";
const char *a = s;
const char *b = t;
int d = 0;
do {
d = *b - *a;
} while (*a++ && *b++);
return d;
}
constexpr char a [] = "a";
constexpr char b [] = "b";
constexpr int i0 = __builtin_strcmp ("a", "b");
constexpr int i1 = __builtin_strcmp (a, b);
constexpr int i2 = f1 ();
constexpr int i3 = f2 (a, b);
constexpr int i4 = f3 ();
u.c:42:23: in constexpr expansion of ‘f1()’
u.c:10:27: error: ‘__builtin_strcmp(((const char*)(& a)), ((const char*)(&
b)))’ is not a constant expression
return __builtin_strcmp (a, b);
~~~~~~~~~~~~~~~~~^~~~~~
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Subject: [Bug c++/67026] GCC incorrectly rejects well-formed constexpr function definition
Date: Wed, 27 Apr 2016 03:22:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2015-08-29 00:00:00 |2016-4-26
CC| |msebor at gcc dot gnu.org
Known to fail| |5.3.0, 6.0
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
All test cases still fail with the current trunk. I've updated the Known to
fail field to reflect that.
$ cat z.cpp && /home/msebor/build/gcc-trunk-git/gcc/xgcc
-B/home/msebor/build/gcc-trunk-git/gcc -S -Wall -Wextra -Wpedantic z.cpp
void g () { }
constexpr int f0 () { return 0; g (); }
constexpr int f1 () { return 0; throw 0; }
z.cpp: In function ‘constexpr int f0()’:
z.cpp:2:35: error: call to non-constexpr function ‘void g()’
constexpr int f0 () { return 0; g (); }
~~^~
z.cpp: In function ‘constexpr int f1()’:
z.cpp:3:42: error: expression ‘<throw-expression>’ is not a constant-expression
constexpr int f1 () { return 0; throw 0; }
^
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Subject: [Bug c++/67824] constexpr char* compare operations not constexpr, but char[] operations ARE
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2015-11-25 00:00:00 |2016-4-26
CC| |msebor at gcc dot gnu.org
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with all supported versions of GCC, including today's top of trunk:
$ cat z.cpp && /home/msebor/build/gcc-trunk-git/gcc/xgcc
-B/home/msebor/build/gcc-trunk-git/gcc -S -Wall -Wextra -Wpedantic
-fdump-tree-optimized=/dev/stdout -xc++ z.cpp
constexpr const char s[] = "1234";
constexpr const char* p = "1234";
static_assert (s < s + 1, "This works");
static_assert (p < p + 1, "This fails");
z.cpp:5:1: error: non-constant condition for static assertion
static_assert (p < p + 1, "This fails");
^~~~~~~~~~~~~
z.cpp:5:18: error: ‘(((const char*)"1234") < (((const char*)"1234") + 1u))’ is
not a constant expression
static_assert (p < p + 1, "This fails");
~~^~~~~~~
>From gcc-bugs-return-523252-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 04:45:22 2016
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From: "physiker at toast2 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70817] New: Internal compiler error coarrays -finit-real=snan
Date: Wed, 27 Apr 2016 04:45:00 -0000
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Bug ID: 70817
Summary: Internal compiler error coarrays -finit-real=snan
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: physiker at toast2 dot net
Target Milestone: ---
Compiling the file t.f90 causes gfortran version 5.3 (OpenCoarrays-1.4.0) and
gcc-6.0.1-RC-20160423 (OpenCoarrays current git version) to crash with an
internal compiler error. Without the option -finit-real=snan the code compiles
without errors.
t.f90
PROGRAM f
IMPLICIT NONE
REAL(4), PARAMETER :: zero = 0.0e0_4
INTEGER :: n[*]
REAL (4) :: p[*]
REAL (4) :: h
n = 1
h = REAL(n, KIND=4)
p = zero
END PROGRAM f
Driving: gfortran-6 -Wl,-flat_namespace --verbose t.f90 -finit-real=snan -L
/Users/Peter/Downloads/opencoarrays/opencoarrays-build/lib -fcoarray=lib
-lcaf_mpi
-I/Users/Peter/Downloads/opencoarrays/prerequisites/mpich-3.1.4-installation/include
-I/Users/Peter/Downloads/opencoarrays/prerequisites/mpich-3.1.4-installation/include
-L/Users/Peter/Downloads/opencoarrays/prerequisites/mpich-3.1.4-installation/lib
-lmpifort -lmpi -lpmpi -mmacosx-version-min=10.9.4 -l gfortran -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran-6
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-apple-darwin13.4.0/6.0.1/lto-wrapper
Target: x86_64-apple-darwin13.4.0
Configured with: ../gcc-6.0.1-RC-20160423/configure
--enable-languages=c,c++,fortran,lto --with-gmp=/sw --with-libiconv-prefix=/sw
--with-isl=/sw --with-mpc=/sw --with-system-zlib --program-suffix=-6
Thread model: posix
gcc version 6.0.1 20160423 (prerelease) (GCC)
COLLECT_GCC_OPTIONS='-v' '-finit-real=snan'
'-L/Users/Peter/Downloads/opencoarrays/opencoarrays-build/lib' '-fcoarray=lib'
'-I'
'/Users/Peter/Downloads/opencoarrays/prerequisites/mpich-3.1.4-installation/include'
'-I'
'/Users/Peter/Downloads/opencoarrays/prerequisites/mpich-3.1.4-installation/include'
'-L/Users/Peter/Downloads/opencoarrays/prerequisites/mpich-3.1.4-installation/lib'
'-mmacosx-version-min=10.9.4' '-shared-libgcc' '-mtune=core2'
/usr/local/libexec/gcc/x86_64-apple-darwin13.4.0/6.0.1/f951 t.f90 -I
/Users/Peter/Downloads/opencoarrays/prerequisites/mpich-3.1.4-installation/include
-I
/Users/Peter/Downloads/opencoarrays/prerequisites/mpich-3.1.4-installation/include
-fPIC -quiet -dumpbase t.f90 -mmacosx-version-min=10.9.4 -mtune=core2 -auxbase
t -version -finit-real=snan -fcoarray=lib -fintrinsic-modules-path
/usr/local/lib/gcc/x86_64-apple-darwin13.4.0/6.0.1/finclude -o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc821ws8.s
GNU Fortran (GCC) version 6.0.1 20160423 (prerelease)
(x86_64-apple-darwin13.4.0)
compiled by GNU C version 6.0.1 20160423 (prerelease), GMP version
6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version 0.14 or 0.13
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran2008 (GCC) version 6.0.1 20160423 (prerelease)
(x86_64-apple-darwin13.4.0)
compiled by GNU C version 6.0.1 20160423 (prerelease), GMP version
6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version 0.14 or 0.13
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
t.f90:5:0:
REAL (4) :: p[*]
internal compiler error: in fold_convert_loc, at fold-const.c:2256
t.f90:5:0: internal compiler error: Abort trap: 6
gfortran-6: internal compiler error: Abort trap: 6 (program f951)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
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Subject: [Bug target/70797] gcc.exe: Internal compiler error: (program as)
Date: Wed, 27 Apr 2016 06:43:00 -0000
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--- Comment #2 from Abhijith Raghavendra <abhijithr1 at gmail dot com> ---
(In reply to Marek Polacek from comment #1)
> Something in your installation is wrong, then, but it's hard to say anything
> without more details. Anyway, hardly a C FE issue.
Thanks a lot for your reply. What details i should provide so that you can tell
in detail regarding this issue.
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Subject: [Bug sanitizer/70683] [7 Regression] -fcompare-debug bug with -fsanitizedress
Date: Wed, 27 Apr 2016 07:46:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 27 07:45:57 2016
New Revision: 235469
URL: https://gcc.gnu.org/viewcvs?rev=235469&root=gcc&view=rev
Log:
PR sanitizer/70683
* tree.h (inchash::add_expr): Add FLAGS argument.
* tree.c (inchash::add_expr): Likewise. If not OEP_ADDRESS_OF,
use STRIP_NOPS first. For INTEGER_CST assert not OEP_ADDRESS_OF.
For REAL_CST and !HONOR_SIGNED_ZEROS (t) hash +/- 0 the same.
Formatting fix. Adjust recursive calls. For tcc_comparison,
if swap_tree_comparison (code) is smaller than code, hash that
and arguments in the other order. Hash CONVERT_EXPR the same
as NOP_EXPR. For OEP_ADDRESS_OF hash MEM_REF with 0 offset
of ADDR_EXPR of decl as the decl itself. Add or remove
OEP_ADDRESS_OF from recursive flags as needed. For
FMA_EXPR, WIDEN_MULT_{PLUS,MINUS}_EXPR hash the first two
operands commutatively and only the third one normally.
For internal CALL_EXPR hash in CALL_EXPR_IFN.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree.c
trunk/gcc/tree.h
>From gcc-bugs-return-523255-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 07:50:27 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/70759] Ada rts fails to build with -mabi=ilp32
Date: Wed, 27 Apr 2016 07:50:00 -0000
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Wed Apr 27 07:49:49 2016
New Revision: 235472
URL: https://gcc.gnu.org/viewcvs?rev=235472&root=gcc&view=rev
Log:
PR ada/70759
* stor-layout.h (internal_reference_types): Delete.
* stor-layout.c (reference_types_internal): Likewise.
(internal_reference_types): Likewise.
(layout_type) <REFERENCE_TYPE>: Adjust.
ada/
* gcc-interface/misc.c (gnat_init): Do not call
internal_reference_types.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/gcc-interface/misc.c
trunk/gcc/stor-layout.c
trunk/gcc/stor-layout.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 tree-optimization/70804] Missed tail-call
Date: Wed, 27 Apr 2016 07:57:00 -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| |2016-04-27
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed on x86_64.
/* Make sure the tail invocation of this function does not refer
to local variables. */
FOR_EACH_LOCAL_DECL (cfun, idx, var)
{
if (TREE_CODE (var) != PARM_DECL
&& auto_var_in_fn_p (var, cfun->decl)
&& (ref_maybe_used_by_stmt_p (call, var)
|| call_may_clobber_ref_p (call, var)))
return;
}
prevents this.
void f() ()
{
struct B b;
<bb 2>:
MEM[(struct E *)&b]._vptr.E = &MEM[(void *)&_ZTV1E + 16B];
E::destroy (&b.D.2301);
b ={v} {CLOBBER};
return;
here ::destroy may use/clobber the stack-local b. Not sure if we can argue
that if after the tailcall there is a clobber of b then that is safe or
what exactly was the logic with the check.
>From gcc-bugs-return-523257-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 08:02:33 2016
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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++/70806] Missing deallocation of exception handler emergency pool breaks -static-libstdc++ with dlopen
Date: Wed, 27 Apr 2016 08:02:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-27
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
No, there is no solution to dlclose of libstdc++ (or a lib statically linking
libstdc++/libsupc++) leaking that memory.
I can imagine that some configury could be added to make the allocation static
(the plan was to add a way to control the pool size via the environment which
is why it is now a dynamic allocation rather than a static one).
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70807] fwprop pass ICE with incoming CDI_DOMINATORS
Date: Wed, 27 Apr 2016 08:08:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
fwprop already calculates dominance info and frees it as well. It invalidates
it via calling purge_dead_edges. It also calls cleanup_cfg twice for no good
reason (in fwprop_done and after it).
As dominance calculation does a verify-dominance info dom info should be
up-to-date there. freeing it before fwprop can't fix anything.
>From gcc-bugs-return-523259-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 08:16:24 2016
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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/70812] Delay folding further in C front-end
Date: Wed, 27 Apr 2016 08:16:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-27
CC| |jason at gcc dot gnu.org,
| |jsm28 at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yeah, we still rely on all of the GENERIC eventually being fold()ed by the
frontends. gimplification doesn't re-fold things before gimplifying it and
the generated GIMPLE while most of it being folded via fold_stmt cannot (yet)
recover the missing use-def links and only sees single GIMPLE stmt expressions
(I'm working on fixing that).
In the wonderful new world we'd build all GIMPLE with the match-and-simplify
machinery during gimplification and would not need any folding (besides
constexpr and initializers) on GENERIC done by the frontends.
>From gcc-bugs-return-523260-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 08:16:37 2016
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From: "tcorbat at hsr dot ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70818] New: Multiple calls of virtual base class contructor (with braced initialization)
Date: Wed, 27 Apr 2016 08:16:00 -0000
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Bug ID: 70818
Summary: Multiple calls of virtual base class contructor (with
braced initialization)
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: trivial
Priority: P3
Component: c++
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I've encountered a surprising behavior of a resulting executable when compiling
the following code (g++ -std=c++11):
- main.cpp ---------------------------------------------
#include <iostream>
struct V {
V(){std::cout << "V()\n";}
};
struct A : virtual V {
A() : V{} {std::cout << "A()\n";}
};
struct B : A {
B(): V{}, A{} {std::cout << "B()\n";}
};
int main(int argc, char **argv) {
B b{};
}
--------------------------------------------------------
I expected each constructor being called once, since B is responsible for
constructing V and construction of V as base of A is omitted(C++ Standard
[class.base.init]/7). But surprisingly the output was as follows:
V()
V()
A()
B()
This behavior changes when I modify the B constructor to call the A constructor
with parentheses instead of braced initializers:
B(): V{}, A() {std::cout << "B()\n";}
This results in the expected output:
V()
A()
B()
According to my understanding both versions should behave the same and the
former is a bug.
>From gcc-bugs-return-523261-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 08:27:50 2016
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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/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Wed, 27 Apr 2016 08:27:00 -0000
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Thanks. I'm currently fixing PR70785 to get that testing coverage back and
will
go forward with this fix after I can successfully test it with a LTO bootstrap
with IPA PTA enabled.
>From gcc-bugs-return-523262-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 09:24:00 2016
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Subject: [Bug testsuite/70595] Cilk Plus testsuite needs massive cleanup
Date: Wed, 27 Apr 2016 09:23:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2016-04/msg01596.ht
| |ml
--- Comment #3 from Rainer Orth <ro at gcc dot gnu.org> ---
Patch submitted.
>From gcc-bugs-return-523263-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 09:55:26 2016
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Subject: [Bug c++/55922] brace initializing parent cause bogus virtual base constructor calls
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |tcorbat at hsr dot ch
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 70818 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523264-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 09:55:26 2016
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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++/70818] Multiple calls of virtual base class contructor (with braced initialization)
Date: Wed, 27 Apr 2016 09:55:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
Severity|trivial |normal
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is a dup of PR 55922
*** This bug has been marked as a duplicate of bug 55922 ***
>From gcc-bugs-return-523265-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 10:03:36 2016
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70776] [4.9/5/6/7 Regression] ICE on invalid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Wed, 27 Apr 2016 10:03:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
CC| |paolo.carlini at oracle dot com
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Related to c++/51488 and co.
>From gcc-bugs-return-523266-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 10:10:38 2016
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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/70342] g++ -fsanitize=undefined never finishes compiling (>24h) in qtxmlpatterns test suite
Date: Wed, 27 Apr 2016 10:10:00 -0000
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
After hours of reducing:
class A {};
class B {
public:
B(A);
};
class C {
public:
C operator<<(B);
};
class D {
D(const int &);
C m_blackList;
};
D::D(const int &) {
m_blackList << A() << A() << A() << A() << A() << A() << A() << A() << A()
<< A() << A() << A() << A() << A() << A() << A() << A() << A()
<< A() << A() << A() << A() << A() << A() << A() << A() << A()
<< A() << A() << A() << A() << A() << A() << A() << A() << A()
<< A() << A() << A() << A() << A() << A() << A() << A() << A()
<< A() << A();
}
>From gcc-bugs-return-523267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 10:13:22 2016
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Subject: [Bug bootstrap/62077] --with-build-config=bootstrap-lto fails
Date: Wed, 27 Apr 2016 10:13:00 -0000
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--- Comment #66 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue re-appears with GCC 6, the workaround doing
--enable-stage1-checking=release still works.
Note that the comparison we do with LTO bootstrap is quite pointless as we
only compile the internal IL at LTO streaming time but not the final result
of optimization. For that we'd need to compare cc1, cc1plus, etc. itself.
So a fix would be to make the comparison configurable to a tri-stage
{ object-files, binaries, off } where a boostrap with comparison off
can also omit building stage3 but still get the benefit of building
GCC with itself and not the host compiler.
Comparing the binaries is generally slower of course.
>From gcc-bugs-return-523268-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 10:38:32 2016
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Subject: [Bug tree-optimization/70804] Missed tail-call
Date: Wed, 27 Apr 2016 10:38:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Tailcall optimization is not applicable here: while E::destroy is running, the
object must still be live (and the body of E::destroy is unavailable, so GCC
can't know if it inspects the object or not).
But if you're making a tailcall from f to E::destroy, you're invoking
E::destroy after the lifetime of b has ended. E::destroy accepts a pointer to
the object ('this'), but if you'd be making a tailcall, the 'this' you'd be
passing would point to just-deallocated f's stack frame.
>From gcc-bugs-return-523269-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 10:42:53 2016
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Subject: [Bug ipa/70785] LTO bootstrap with IPA PTA is broken
Date: Wed, 27 Apr 2016 10:42:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 27 10:42:08 2016
New Revision: 235477
URL: https://gcc.gnu.org/viewcvs?rev=235477&root=gcc&view=rev
Log:
2016-04-27 Richard Biener <rguenther@suse.de>
PR ipa/70785
* tree-ssa-structalias.c (refered_from_nonlocal_fn): New
function cummulating used_from_other_partition, externally_visible
and force_output from aliases.
(refered_from_nonlocal_var): Likewise.
(ipa_pta_execute): Use call_for_symbol_and_aliases to cummulate
node flags properly.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-structalias.c
>From gcc-bugs-return-523270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 10:43:15 2016
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Subject: [Bug ipa/70785] LTO bootstrap with IPA PTA is broken
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0
Known to fail| |6.1.0
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-523271-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 10:53:21 2016
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Subject: [Bug target/69634] [4.9/5 Regression] -fcompare-debug failure (length) with -O2 -fno-dce -fschedule-insns -fno-tree-vrp @ i686
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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Subject: [Bug target/70123] [5 Regression] Miscompilation of cfitsio testcase on s390x-linux starting with r222144
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>From gcc-bugs-return-523273-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 10:54:18 2016
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Subject: [Bug rtl-optimization/70224] [5 regression] ICE: RTL flag check: CROSSING_JUMP_P used with unexpected rtx code 'insn' in relax_delay_slots, at reorg.c:3310
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Subject: [Bug go/70597] [6/7 Regression] cmd/go: deduplicate gccgo afiles by package path, not *Package
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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> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523285-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 10:57:05 2016
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Subject: [Bug target/68664] PowerPC: speculative sqrt in c-ray main loop causes large slow down
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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> ---
GCC 6.1 has been released.
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Subject: [Bug fortran/67219] [6/7 Regression] Incorrect conversion warning
Date: Wed, 27 Apr 2016 10:56:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/65139] Improve register allocation for aarch64_*_sisd_or_int<mode>3 patterns
Date: Wed, 27 Apr 2016 10:56:00 -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> ---
GCC 6.1 has been released.
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Subject: [Bug rtl-optimization/70164] [6/7 Regression] Code/performance regression due to poor register allocation on Cortex-M0
Date: Wed, 27 Apr 2016 10:56:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug tree-optimization/69068] [6/7 Regression] ICE in bb_contains_loop_phi_nodes, at graphite-isl-ast-to-gimple.c:1279
Date: Wed, 27 Apr 2016 10:56:00 -0000
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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> ---
GCC 6.1 has been released.
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Subject: [Bug c++/66487] sanitizer/warnings for lifetime DSE
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #21 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/70359] [6/7 Regression] Code size increase for ARM compared to gcc-5.3.0
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug other/66250] Can't adjust complex nor decimal floating point modes
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug tree-optimization/69823] [6/7 Regression] internal compiler error: in create_pw_aff_from_tree, at graphite-sese-to-poly.c:445
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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> ---
GCC 6.1 has been released.
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Subject: [Bug c/64918] invalid (?) warning when initializing structure
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug sanitizer/66401] g++.dg/ubsan/vla-1.C FAILs with PIE
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/67710] FAIL: gcc.dg/darwin-*version-*.c (test for excess errors) with Xcode 7
Date: Wed, 27 Apr 2016 10:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug testsuite/66403] gcc.dg/torture/builtin-self.c FAILs with PIE
Date: Wed, 27 Apr 2016 10:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug tree-optimization/68682] [6/7 Regression] [graphite] loop interchange no longer working after r227277
Date: Wed, 27 Apr 2016 10:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug tree-optimization/64715] [5/6/7 Regression] __builtin_object_size (..., 1) fails to locate subobject
Date: Wed, 27 Apr 2016 10:57:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug tree-optimization/69196] [5/6/7 Regression] code size regression with jump threading at -O2
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523290-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 10:59:30 2016
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Subject: [Bug rtl-optimization/70222] Test miscompiled with -O1
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug c++/65642] [C++11] GCC rejects valid constant expression
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug tree-optimization/68644] [6/7 Regression] FAIL: gcc.dg/tree-ssa/ivopts-lt-2.c scan-tree-dump-times ivopts "PHI <p_" 1
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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> ---
GCC 6.1 has been released.
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Subject: [Bug fortran/68717] [6/7 Regression] New (bogus?) warnings when compiling some gfortran.dg tests with -flto after r231239
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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> ---
GCC 6.1 has been released.
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Subject: [Bug target/62254] [4.9/5/6/7 Regression] gcc-4.9 ICEs on linux kernel zlib for armv3
Date: Wed, 27 Apr 2016 10:58:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #22 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug ipa/70582] [6/7 regression] gcc.dg/attr-weakref-1.c FAILs
Date: Wed, 27 Apr 2016 10:58:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug bootstrap/69513] LTO bootstrap fails with bootstrap-profiled during linking gnat1 in stagefeedback
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug sanitizer/67513] ASAN: Not optimal shadow value check (unlikely condition checked in fast path)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug fortran/68560] [6/7 Regression] The test gfortran.dg/shape_8.f90 now fails when compiled with -flto
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #21 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/66200] GCC for ARM / AArch64 doesn't define TARGET_RELAXED_ORDERING
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug rtl-optimization/68749] FAIL: gcc.dg/ifcvt-4.c scan-rtl-dump ce1 "2 true changes made"
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug libstdc++/69331] FAIL: 20_util/shared_ptr/thread/default_weaktoshared.cc execution test
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug middle-end/28628] Not forcing alignment of arrays in structs with -fsection-anchors
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug c++/70810] std::function template variadic template arguments do not unpack in function template
Date: Wed, 27 Apr 2016 11:00:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Not a bug, the parameter pack for std::function<void(Ts...)> cannot be deduced
from the arguments, because a function pointer is not a std::function.
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Subject: [Bug c++/58796] throw nullptr not caught by catch(type*)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/66195] Optimize _GLIBCXX_GUARD_TEST_AND_ACQUIRE and _GLIBCXX_GUARD_SET_AND_RELEASE for PowerPC
Date: Wed, 27 Apr 2016 11:00:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug fortran/67420] gfortran.dg/norm2_3.f90 FAILs
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug middle-end/65534] tailcall not optimized away
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug c++/66398] g++.dg/abi/anon1.C FAILs with PIE
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug c++/70019] VLA size overflow not detected
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/69639] [6/7 Regression] FAIL: gcc.c-torture/compile/limits-exprparen.c
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/70750] [6/7 Regression] Load and call no longer combined for indirect calls on x86
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/68752] PowerPC: vector reciprocal square root estimate missed optimisations
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:09:43 2016
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Subject: [Bug c++/68510] [concepts] ICE: in gimplify_var_or_parm_decl, at gimplify.c:1827
Date: Wed, 27 Apr 2016 11:01:00 -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> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523320-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:09:33 2016
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Subject: [Bug testsuite/66404] gcc.target/i386/pad-10.c etc. FAIL with PIE
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523324-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:09:48 2016
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Subject: [Bug libgcj/69333] [6/7 Regression] FAIL: StackTrace2 execution - source compiled test
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523303-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:05:07 2016
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Subject: [Bug ipa/64253] IPA inline analysis processes a code transform operation
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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> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523296-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:02:34 2016
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Subject: [Bug middle-end/67239] [6/7 Regression] FAIL: 23_containers/unordered_set/insert/hash_policy.cc execution test
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523325-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:09:51 2016
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Subject: [Bug target/67321] [ARM] Exploit Wide Add operations when appropriate
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523314-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:07:31 2016
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Subject: [Bug c/67819] -Wduplicated-cond should take macros into account
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523302-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:05:08 2016
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Subject: [Bug c++/68939] ICE or wrong code with OpenMP privatization of reference to VLAs
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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> ---
GCC 6.1 has been released.
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Subject: [Bug target/66960] Add interrupt attribute to x86 backend
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523306-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:05:56 2016
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Subject: [Bug target/35514] Gcc shoud generate symbol type for undefined symbol
Date: Wed, 27 Apr 2016 11:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523338-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:11:39 2016
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Subject: [Bug ipa/70583] [6/7 Regression] FAIL: g++.old-deja/g++.abi/vtable2.C -std=gnu++98 execution test
Date: Wed, 27 Apr 2016 11:02:00 -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> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523345-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:12:35 2016
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Subject: [Bug tree-optimization/69728] [6/7 Regression] internal compiler error: in outer_projection_mupa, at graphite-sese-to-poly.c:1175
Date: Wed, 27 Apr 2016 11:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Wed, 27 Apr 2016 11:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523333-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:11:15 2016
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Subject: [Bug ipa/66004] [6/7 Regression]: performance of 26_numerics/random/negative_binomial_distribution/operators/values.cc
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:11:46 2016
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Subject: [Bug tree-optimization/70390] [6/7 Regression] internal compiler error: in copy_loop_close_phi_args, at graphite-isl-ast-to-gimple.c:2114
Date: Wed, 27 Apr 2016 11:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523336-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:11:32 2016
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Subject: [Bug tree-optimization/70315] FAIL: gcc.dg/tree-ssa/sra-17.c scan-tree-dump-times esra
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523330-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:10:17 2016
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Subject: [Bug target/68690] PowerPC64: TOC save in PHP core loop results in load hit store
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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> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523334-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:11:23 2016
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Subject: [Bug tree-optimization/67326] [5/6/7 Regression] -ftree-loop-if-convert-stores does not vectorize conditional assignment (anymore)
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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> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523337-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:11:43 2016
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Subject: [Bug target/67400] -fno-plt doesn't work with function pointers
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523342-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:12:00 2016
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Subject: [Bug tree-optimization/69067] [6/7 Regression] ICE in get_def_bb_for_const, at graphite-isl-ast-to-gimple.c:1995
Date: Wed, 27 Apr 2016 11:02:00 -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> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:10:21 2016
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Subject: [Bug c++/60336] empty struct value is passed differently in C and C++
Date: Wed, 27 Apr 2016 11:02:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #46 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug c/65430] Missing -Wsequence-point warning with COMPOUND_EXPRs
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:11:50 2016
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Subject: [Bug fortran/67419] gfortran.dg/large_real_kind_2.F90 FAILs
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523348-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:12:46 2016
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Subject: [Bug fortran/69659] [6/7 Regression] ICE on using option -frepack-arrays, in gfc_conv_descriptor_data_get
Date: Wed, 27 Apr 2016 11:03:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523355-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:13:14 2016
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Subject: [Bug target/69153] --with-advance-toolchain configure option does not correctly set configure variable target_header_dir
Date: Wed, 27 Apr 2016 11:03:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:13:09 2016
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Subject: [Bug rtl-optimization/69307] [4.9 Regression] wrong code with -O2 -fselective-scheduling @ armv7a
Date: Wed, 27 Apr 2016 11:03:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523356-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:13:17 2016
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Subject: [Bug fortran/68009] [6/7 Regression] prototype for gfortran_runtime_error with inline matmul
Date: Wed, 27 Apr 2016 11:03:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523346-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:12:39 2016
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Subject: [Bug fortran/70040] [6/7 Regression] ICE in gimplify.c with deferred-length strings
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523358-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:13:30 2016
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Subject: [Bug libstdc++/60421] std::this_thread::sleep_for doesn't sleep for all arguments
Date: Wed, 27 Apr 2016 11:03:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/60290] 32-bit g++.dg/cilk-plus/CK/catch_exc.cc FAILs on Solaris/x86
Date: Wed, 27 Apr 2016 11:03:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523352-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:13:01 2016
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Subject: =?UTF-8?B?W0J1ZyBjLzY1ODkxXSAtV2xvZ2ljYWwtb3Agbm93IHdhcm5zIGFib3V0IGxv?= =?UTF-8?B?Z2ljYWwg4oCYYW5k4oCZIG9mIGVxdWFsIGV4cHJlc3Npb25zIGV2ZW4gd2hl?= =?UTF-8?B?biBkaWZmZXJlbnQgdHlwZXMvc2l6ZW9mcyBhcmUgaW52b2x2ZWQ=?Date: Wed, 27 Apr 2016 11:03:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523357-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:13:33 2016
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Subject: [Bug c/39589] make -Wmissing-field-initializers=2 work with "designated initializers" ?
Date: Wed, 27 Apr 2016 11:03:00 -0000
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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> ---
GCC 6.1 has been released.
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Subject: [Bug target/65846] Optimize data access in PIE with copy reloc
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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> ---
GCC 6.1 has been released.
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Subject: [Bug rtl-optimization/69633] [6/7 Regression] Redundant move is generated after r228097
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug c/65452] strcmp (foo, foo) could give a warning
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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> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523351-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:12:57 2016
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Subject: [Bug middle-end/61225] [5/6/7 Regression] Several new failures after r210458 on x86_64-*-* with -m32
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #25 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/61551] [NEON] alter costs to allow use of post-indexed addressing modes for VLD{2..4}/VST{2..4}
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523370-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:14:16 2016
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Subject: [Bug target/67412] gfortran.dg/execute_command_line_2.f90 FAILs on Solaris 10
Date: Wed, 27 Apr 2016 11:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523369-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:14:12 2016
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Subject: [Bug testsuite/70150] Additonal test failures with --enable-default-pie
Date: Wed, 27 Apr 2016 11:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug fortran/65024] [OOP] unlimited polymorphic pointer structure not built when it should be
Date: Wed, 27 Apr 2016 11:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug c++/66399] g++.dg/abi/anon4.C FAILs with PIE
Date: Wed, 27 Apr 2016 11:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/67352] [avr] incorrect warning with -Waddr-space-convert and array in struct in __flash
Date: Wed, 27 Apr 2016 11:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug rtl-optimization/66207] Switch alpha to LRA
Date: Wed, 27 Apr 2016 11:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug c++/64266] Can GCC produce local mergeable symbols for *.__FUNCTION__ and *.__PRETTY_FUNCTION__ functions?
Date: Wed, 27 Apr 2016 11:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug rtl-optimization/49857] Put constant switch-tables into flash
Date: Wed, 27 Apr 2016 11:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug tree-optimization/69675] [6/7 Regression] [graphite] ICE: verify_ssa failed (definition in block 42 does not dominate use in block 34)
Date: Wed, 27 Apr 2016 11:04:00 -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> ---
GCC 6.1 has been released.
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Subject: [Bug middle-end/68733] [6/7 Regression] FAIL: libgomp.c/target-29.c (internal compiler error)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug libstdc++/60936] [4.9/5/6/7 Regression] Binary code bloat with std::string
Date: Wed, 27 Apr 2016 11:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug c++/65866] Wrong warning when using list-initialization: operation on 'b' may be undefined [-Wsequence-point]
Date: Wed, 27 Apr 2016 11:04:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug c++/66644] Rejects C++11 in-class anonymous union members initialization
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug middle-end/66334] cleanup block fails to initialize EBX
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523362-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:13:50 2016
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Subject: [Bug other/66259] Combined gcc and binutils build from git-master fails, with gas/as-new not existing
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523381-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:15:10 2016
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Subject: [Bug c++/70810] std::function template variadic template arguments do not unpack in function template
Date: Wed, 27 Apr 2016 11:05:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Similar problems described at:
http://stackoverflow.com/q/11103384/981959
http://stackoverflow.com/q/34051435/981959
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Subject: [Bug fortran/68649] [6/7 Regression] note: code may be misoptimized unless -fno-strict-aliasing is used
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523374-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:14:45 2016
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Subject: [Bug c++/70781] [6/7 Regression] ICE on invalid C++ code with lambda expressions on x86_64-linux-gnu in finish_expr_stmt, at cp/semantics.c:677
Date: Wed, 27 Apr 2016 11:05:00 -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> ---
GCC 6.1 has been released.
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Subject: [Bug libstdc++/69332] [6/7 Regression] FAIL: libstdc++-prettyprinters/libfundts.cc print ab
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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> ---
GCC 6.1 has been released.
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Subject: [Bug rtl-optimization/70703] [6/7 regression] Regression in register usage on x86
Date: Wed, 27 Apr 2016 11:05:00 -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> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:14:57 2016
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Subject: [Bug c++/70621] [6/7 Regression] ICE on invalid code at -O1 and above on x86_64-linux-gnu in record_reference, at cgraphbuild.c:64
Date: Wed, 27 Apr 2016 11:05:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug sanitizer/68065] Size calculations for VLAs can overflow
Date: Wed, 27 Apr 2016 11:05:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #36 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523375-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:14:41 2016
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Subject: [Bug target/67973] All the tests for -gstabs* fail on x86_64-apple-darwin14 with Xcode 7
Date: Wed, 27 Apr 2016 11:05:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523343-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:12:30 2016
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Subject: [Bug tree-optimization/69184] [6/7 Regression] ICE in copy_cond_phi_nodes, at graphite-isl-ast-to-gimple.c:2685
Date: Wed, 27 Apr 2016 11:06:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug target/66171] [6/7 Regression]: gcc.target/cris/biap.c
Date: Wed, 27 Apr 2016 11:06:00 -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> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:15:19 2016
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Subject: [Bug c++/70588] SIGBUS on a VLA larger than SIZE_MAX / 2
Date: Wed, 27 Apr 2016 11:06:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:12:06 2016
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Subject: [Bug tree-optimization/68128] A huge regression in Parboil v2.5 OpenMP CUTCP test (2.5 times lower performance)
Date: Wed, 27 Apr 2016 11:06:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523326-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:09:57 2016
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Subject: [Bug debug/53118] [4.9/5/6/7 regression] -feliminate-dwarf2-dups is broken for C++
Date: Wed, 27 Apr 2016 11:15:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523384-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:16:23 2016
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
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--- Comment #16 from amker at gcc dot gnu.org ---
(In reply to amker from comment #15)
> Also the case is reported not vectorized on Solaris/SPARC in PR70803. I
> will investigate and follow up it in that ticket.
>
> Thanks.
Hmm, that one is for PR56625.c not vectorized on sparc, so this is still a
different issue.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug tree-optimization/62630] [5/6/7 Regression] gcc.dg/graphite/vect-pr43423.c XFAILed
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #23 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug fortran/66089] [6/7 Regression] elemental dependency mishandling when derived types are involved
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug tree-optimization/69580] [6/7 Regression] From 26/7 seconds to 10 minutes moving from gcc 5.3.1 to gcc 6.0.0
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 6.1 has been released.
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Subject: [Bug fortran/68887] [6/7 regression] gfortran.dg/coarray/event_[12].f90 -fcoarray=lib -O2 -lcaf_single -latomic fails
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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> ---
GCC 6.1 has been released.
>From gcc-bugs-return-523385-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 11:29:59 2016
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Subject: [Bug go/49889] Calling a function whose name is obscured by a local variable does not produce an error
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--- Comment #3 from Nick Clifton <nickc at gcc dot gnu.org> ---
Author: nickc
Date: Wed Apr 27 11:29:20 2016
New Revision: 235484
URL: https://gcc.gnu.org/viewcvs?rev=235484&root=gcc&view=rev
Log:
PR middle-end/49889
gcc * varasm.c (merge_weak): Generate an error if an attempt is made
to convert a non-weak static function into a weak, public function.
testsuite * gcc.dg/pr49889.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr49899.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/varasm.c
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Subject: [Bug libstdc++/70767] std::numeric_limits<const unsigned char>::digits is wrong unless --std=c++11 used
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Apr 27 11:57:58 2016
New Revision: 235486
URL: https://gcc.gnu.org/viewcvs?rev=235486&root=gcc&view=rev
Log:
libstdc++/70767 Define std::numeric_limits<cv T> in C++98 mode
PR libstdc++/70767
* include/std/limits: Update comments about DRs.
(numeric_limits<const _Tp>, numeric_limits<volatile _Tp>,
numeric_limits<const volatile _Tp>): Define unconditionally.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/std/limits
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Subject: [Bug libstdc++/70767] std::numeric_limits<const unsigned char>::digits is wrong unless --std=c++11 used
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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> ---
For GCC 7 the specializations for cv-qualified types will always be defined.
I'm not going to backport that to current release branches though (since they
are not incorrect according to the C++98 standard).
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Subject: [Bug target/70728] GCC trunk emits invalid assembly for knl target
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70728
--- Comment #4 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Author: kyukhin
Date: Wed Apr 27 12:09:45 2016
New Revision: 235487
URL: https://gcc.gnu.org/viewcvs?rev=235487&root=gcc&view=rev
Log:
AVX-512. PR target/70728. Use separate constraint for AVX-512BW
PR target/70728
gcc/
* gcc/config/i386/sse.md (define_insn
"<shift_insn><mode>3<mask_name>"):
Extract AVX-512BW constraint from AVX.
gcc/testsuite/
* gcc.target/i386/pr70728.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr70728.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 middle-end/70680] [5/6 Regression] OpenMP SIMD linear variable privatized too eagerly
Date: Wed, 27 Apr 2016 12:23:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 27 12:22:47 2016
New Revision: 235489
URL: https://gcc.gnu.org/viewcvs?rev=235489&root=gcc&view=rev
Log:
Backported from mainline
2016-04-19 Jakub Jelinek <jakub@redhat.com>
PR middle-end/70680
* gimplify.c (gimplify_omp_for): Call omp_notice_variable for
implicitly linear or lastprivate iterator on the outer context.
* testsuite/libgomp.c/pr70680-1.c: New test.
* testsuite/libgomp.c/pr70680-2.c: New test.
Added:
branches/gcc-6-branch/libgomp/testsuite/libgomp.c/pr70680-1.c
branches/gcc-6-branch/libgomp/testsuite/libgomp.c/pr70680-2.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 middle-end/70680] [5 Regression] OpenMP SIMD linear variable privatized too eagerly
Date: Wed, 27 Apr 2016 12:24:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[5/6 Regression] OpenMP |[5 Regression] OpenMP SIMD
|SIMD linear variable |linear variable privatized
|privatized too eagerly |too eagerly
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed for 6.2+ as well.
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Subject: [Bug sanitizer/70712] False positive from AddressSanitizer with use of 'alignas'
Date: Wed, 27 Apr 2016 12:24:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 27 12:23:50 2016
New Revision: 235490
URL: https://gcc.gnu.org/viewcvs?rev=235490&root=gcc&view=rev
Log:
Backported from mainline
2016-04-23 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/70712
* cfgexpand.c (expand_stack_vars): Fix typo.
* c-c++-common/asan/pr70712.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/c-c++-common/asan/pr70712.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/cfgexpand.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug sanitizer/70342] g++ -fsanitize=undefined never finishes compiling (>24h) in qtxmlpatterns test suite
Date: Wed, 27 Apr 2016 13:04:00 -0000
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--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
There's some non-linearity. This compiles in 25s, if I add another "<< A()"
then in 55s, if I add another "<< A()" then in 1m50s etc.
class A {};
class B {
public:
B(A);
};
class C {
public:
C operator<<(B);
};
class D {
D(const int &);
C m_blackList;
};
D::D(const int &) {
m_blackList << A() << A() << A() << A() << A() << A() << A() << A() << A()
<< A() << A() << A() << A() << A() << A() << A() << A() << A()
<< A() << A() << A() << A() << A();
}
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70814] atomic store of __int128 is not lock free on aarch64
Date: Wed, 27 Apr 2016 13:09:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |aarch64
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-27
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed.
For reference, the testcase is:
#include <atomic>
#include <stdint.h>
std::atomic<__int128> a;
__attribute__((noinline)) void f(int64_t v)
{
a.store(v);
}
int main()
{
f(1);
return 0;
}
g++ at -O2 for aarch64 emits for the function 'f':
_Z1fl:
.LFB328:
.cfi_startproc
mov x2, x0
adrp x1, .LANCHOR0
add x0, x1, :lo12:.LANCHOR0
mov w4, 5
asr x3, x2, 63
b __atomic_store_16
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/70785] LTO bootstrap with IPA PTA is broken
Date: Wed, 27 Apr 2016 13:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.2.0
Resolution|--- |FIXED
Target Milestone|--- |6.2
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Wed, 27 Apr 2016 13:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|6.2 |6.0
--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the underlying issue is that
/* If we pass the result decl by reference, honor that. */
if (lhsop
&& fndecl
&& DECL_RESULT (fndecl)
&& DECL_BY_REFERENCE (DECL_RESULT (fndecl)))
{
for the call
D.941390 =
std::_ZSt11make_uniqueIN3edm20ParameterDescriptionIiEEJRA16_KcRKiRbEENSt9_MakeUniqIT_E15__single_objectEDpOT0_.isra.144
("p_int_untracked", &D.481115, 0); [return slot optimization]
runs into a NULL_TREE DECL_RESULT (fndecl) because that has been freed as
the decl is only an alias:
_ZSt11make_uniqueIN3edm20ParameterDescriptionIiEEJRA16_KcRKiRbEENSt9_MakeUniqIT_E15__single_objectEDpOT0_.isra.144/21428
(typename std::_MakeUniq<_Tp>::__single_object std::make_unique(_Args&& ...)
[with _Tp = edm::ParameterDescription<int>; _Args = {const char (&)[16], const
int&, bool&}]) @0x7ffff4d17450
Type: function definition analyzed alias
Visibility: prevailing_def_ironly artificial
References:
_ZSt11make_uniqueIN3edm20ParameterDescriptionIiEEJRA6_KcRKiRbEENSt9_MakeUniqIT_E15__single_objectEDpOT0_.isra.149/21451
(alias)
Referring:
Availability: local
First run: 0
Function flags: local icf_merged
Called by:
_ZN7edmtest20ProducerWithPSetDesc16fillDescriptionsERN3edm25ConfigurationDescriptionsE/5911
(1.00 per call)
Calls:
so we fail to resolve the decl to the alias target. The following would fix
that
Index: gcc/tree-ssa-structalias.c
===================================================================
--- gcc/tree-ssa-structalias.c (revision 235404)
+++ gcc/tree-ssa-structalias.c (working copy)
@@ -4658,9 +4658,8 @@ find_func_aliases_for_call (struct funct
/* If we pass the result decl by reference, honor that. */
if (lhsop
- && fndecl
- && DECL_RESULT (fndecl)
- && DECL_BY_REFERENCE (DECL_RESULT (fndecl)))
+ && fi->is_fn_info
+ && DECL_BY_REFERENCE (DECL_RESULT (fi->decl)))
{
struct constraint_expr lhs;
struct constraint_expr *rhsp;
but it still won't handle indirect calls correctly which is what the 3rd
patch does. It still might be that I'm going with sth like the above for
the GCC 6 branch.
>From gcc-bugs-return-523395-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 13:11:32 2016
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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/70785] LTO bootstrap with IPA PTA is broken
Date: Wed, 27 Apr 2016 13:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Known to work| |6.2.0
Resolution|--- |FIXED
Target Milestone|--- |6.2
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 27 13:10:47 2016
New Revision: 235501
URL: https://gcc.gnu.org/viewcvs?rev=235501&root=gcc&view=rev
Log:
2016-04-27 Richard Biener <rguenther@suse.de>
PR ipa/70785
* tree-ssa-structalias.c (refered_from_nonlocal_fn): New
function cummulating used_from_other_partition, externally_visible
and force_output from aliases.
(refered_from_nonlocal_var): Likewise.
(ipa_pta_execute): Use call_for_symbol_and_aliases to cummulate
node flags properly.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-structalias.c
>From gcc-bugs-return-523397-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 13:12:22 2016
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Wed, 27 Apr 2016 13:12:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|6.0 |6.2
>From gcc-bugs-return-523398-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 13:20:00 2016
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Subject: [Bug target/70728] GCC trunk emits invalid assembly for knl target
Date: Wed, 27 Apr 2016 13:20:00 -0000
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Kirill Yukhin <kyukhin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Done
>From gcc-bugs-return-523399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 13:21:13 2016
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From: "yyc1992 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70814] atomic store of __int128 is not lock free on aarch64
Date: Wed, 27 Apr 2016 13:21:00 -0000
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--- Comment #2 from Yichao Yu <yyc1992 at gmail dot com> ---
As an update, it seems that the llvm trunk recently switched to using
`__atomic_*` function call for int128 on all platforms (that I can test
anyway). I'm not sure how that decision is made or if there's any communication
with GCC but IMHO it would be nice to agree on using the atomic instruction on
aarch64 as long as it provides all the necessary ones.
>From gcc-bugs-return-523400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 13:30:35 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/70683] [7 Regression] -fcompare-debug bug with -fsanitizedress
Date: Wed, 27 Apr 2016 13:30:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Apr 27 13:29:34 2016
New Revision: 235507
URL: https://gcc.gnu.org/viewcvs?rev=235507&root=gcc&view=rev
Log:
PR sanitizer/70683
* tree-core.h (enum operand_equal_flag): Add OEP_NO_HASH_CHECK.
* fold-const.c (operand_equal_p): If flag_checking and
OEP_NO_HASH_CHECK is not set in flag, recurse with OEP_NO_HASH_CHECK
and if it returns non-zero, assert iterative_hash_expr on both
args is the same.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/tree-core.h
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Subject: [Bug sanitizer/70683] [7 Regression] -fcompare-debug bug with -fsanitizedress
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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From: "hjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70750] [6/7 Regression] Load and call no longer combined for indirect calls on x86
Date: Wed, 27 Apr 2016 13:35:00 -0000
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--- Comment #7 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Wed Apr 27 13:35:03 2016
New Revision: 235509
URL: https://gcc.gnu.org/viewcvs?rev=235509&root=gcc&view=rev
Log:
X86: Fix a typo in call_insn_operand
r231923 has
;; Test for a valid operand for a call instruction.
;; Allow constant call address operands in Pmode only.
(define_special_predicate "call_insn_operand"
(ior (match_test "constant_call_address_operand
(op, mode == VOIDmode ? mode : Pmode)")
(match_operand 0 "call_register_no_elim_operand")
- (and (not (match_test "TARGET_X32"))
- (match_operand 0 "memory_operand"))))
+ (ior (and (not (match_test "TARGET_X32"))
+ (match_operand 0 "sibcall_memory_operand"))
^^^^^^^^^^^^^^^^^^^^^^^ A typo.
+ (and (match_test "TARGET_X32 && Pmode == DImode")
+ (match_operand 0 "GOT_memory_operand")))))
"sibcall_memory_operand" should be "memory_operand".
gcc/
Backported from mainline
PR target/70750
* config/i386/predicates.md (call_insn_operand): Replace
sibcall_memory_operand with memory_operand.
gcc/testsuite/
Backported from mainline
PR target/70750
* gcc.target/i386/pr70750-1.c: New test.
* gcc.target/i386/pr70750-2.c: Likewise.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr70750-1.c
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr70750-2.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/i386/predicates.md
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70750] [6/7 Regression] Load and call no longer combined for indirect calls on x86
Date: Wed, 27 Apr 2016 13:36:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for GCC 7 and 6.2.
>From gcc-bugs-return-523404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 13:40:40 2016
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Subject: [Bug c++/70819] New: constexpr error location wrong
Date: Wed, 27 Apr 2016 13:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70819
Bug ID: 70819
Summary: constexpr error location wrong
Product: gcc
Version: 7.0
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Created attachment 38345
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38345&action=edit
testcase
Invoked as:
nathan@morden:28>./cc1plus -fpreprocessed cexpr-error.ii
we get:
constexpr int fn6(const int&, int) constexpr int fn7(const int*, int)
cexpr-error.ii: At global scope:
cexpr-error.ii:17:24: in constexpr expansion of 'fn7(0u, 0)'
cexpr-error.ii:14:14: in constexpr expansion of 'fn6((* a), b)'
cexpr-error.ii:7:7: error: 'a' is not a constant expression
b = a;
^
cexpr-error.ii:18:24: in constexpr expansion of 'fn7(0u, 8)'
cexpr-error.ii:14:14: in constexpr expansion of 'fn6((* a), b)'
cexpr-error.ii:6:13: in constexpr expansion of 'fn6(a, 0)'
cexpr-error.ii:18:43: error: 'a' is not a constant expression
constexpr int n4 = fn7 ((const int *) 0, 8);
The first error is correctly located at tha 'b = a;' location. The second
instance is not, and shows the original call site. inside constexpr.c the
first error is from an evaluation of the original function body. the second is
from a cloned copy via the recursive call. Something about cloning is throwing
off the error location.
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Subject: [Bug target/66200] GCC for ARM / AArch64 doesn't define TARGET_RELAXED_ORDERING
Date: Wed, 27 Apr 2016 13:44:00 -0000
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James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
CC| |jgreenhalgh at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #11 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Looks like this is fixed on all live branches. Ramana, please reopen if there
is something more to be done that I've missed.
>From gcc-bugs-return-523406-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 13:52:36 2016
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From: "fdrocha at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70820] New: GCC incorrectly accepts code that accesses nested names in an incomplete type
Date: Wed, 27 Apr 2016 13:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70820
Bug ID: 70820
Summary: GCC incorrectly accepts code that accesses nested
names in an incomplete type
Product: gcc
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Consider the following code
template<typename Derived>
struct Base {
static constexpr int i = Derived::j;
// static_assert(i>1, "First assert"); // First Assert
// int array[i]; // Array declation
};
struct Derived : public Base<Derived> {
static constexpr int j = 5 ;
};
static constexpr int k = Base<Derived>::i;
static_assert(Derived::i > 0, "Second Assert");
static_assert(Base<Derived>::i > 0, "Third Assert");
int array[Derived::i];
GCC compiles this (I tried all versions between 4.9.0 and 5.3.0) with no errors
or warnings even with -Wall -Wextra.
If you uncomment either the line marked "First Assert" or "Array Declaration"
it correctly gives the error "error: incomplete type 'Derived' used in nested
name specifier". It should also not accept the code without those lines, for
the same reason.
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Subject: [Bug ada/56616] gnatmake builds SAL incorrectly if library_kind is "static"
Date: Wed, 27 Apr 2016 13:58:00 -0000
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--- Comment #3 from simon at pushface dot org ---
This PR was down to a lack of appreciation of the resources available.
If you provide a Library_Interface and you're building a dynamic
library, gprbuild populates the include Library_Src_Dir directory with
the library interface units and builds a dynamic library with
auto-initialization.
If you provide a Library_Interface and you're building a static library,
gprbuild uses the same rule to populate the include directory; but this
mey be wrong if the non-visible units require elaboration (e.g. they
call in the tasking runtime).
The patch I provided meant that if you provided a Library_Interface for
a static library, the include directory would be populated with all the
units regardless of whether they were actually listed; I now see that
using Interfaces and naming all the source files achieves the same
effect! so no need for a patch (but maybe a blog posting?)
For the BCs this would mean
case Library_Type is
when "relocatable" =>
for Library_Src_Dir use "./include";
for Library_Interface use Source_Units;
when "static" =>
for Library_Src_Dir use "./include";
for Interfaces use Sources;
end case;
where I already have
Source_Units :=
(
"BC.Containers.Bags.Bounded",
"BC.Containers.Bags.Dynamic",
...
and
Sources :=
(
"bc-containers-bags-bounded.adb",
"bc-containers-bags-bounded.ads",
"bc-containers-bags-dynamic.adb",
"bc-containers-bags-dynamic.ads",
...
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Subject: [Bug ipa/70760] [6 regression] wrong generated code for std::make_unique with -fipa-pta
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0
Summary|[6/7 regression] wrong |[6 regression] wrong
|generated code for |generated code for
|std::make_unique with |std::make_unique with
|-fipa-pta |-fipa-pta
Known to fail| |6.1.0
--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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Subject: [Bug ipa/70760] [6/7 regression] wrong generated code for std::make_unique with -fipa-pta
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--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Apr 27 14:10:04 2016
New Revision: 235511
URL: https://gcc.gnu.org/viewcvs?rev=235511&root=gcc&view=rev
Log:
2016-04-27 Richard Biener <rguenther@suse.de>
PR ipa/70760
* tree-ssa-structalias.c (find_func_aliases_for_call): Use
aggregate_value_p to determine if a function result is
returned by reference.
(ipa_pta_execute): Functions having their address taken are
not automatically nonlocal.
* g++.dg/ipa/ipa-pta-2.C: New testcase.
* gcc.dg/ipa/ipa-pta-1.c: Adjust.
Added:
trunk/gcc/testsuite/g++.dg/ipa/ipa-pta-2.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/ipa/ipa-pta-1.c
trunk/gcc/tree-ssa-structalias.c
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Subject: [Bug ipa/70760] [6 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Wed, 27 Apr 2016 14:11:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0
Summary|[6/7 regression] wrong |[6 regression] wrong
|generated code for |generated code for
|std::make_unique with |std::make_unique with
|-fipa-pta |-fipa-pta
Known to fail| |6.1.0
--- Comment #17 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-523411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 14:16:22 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/70760] [6 regression] wrong generated code for std::make_unique with -fipa-pta
Date: Wed, 27 Apr 2016 14:16:00 -0000
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--- Comment #18 from David Abdurachmanov <david.abdurachmanov at gmail dot com> ---
For now I will pull this change into my GCC 6.1.0 build.
Thanks!
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Subject: [Bug c++/70121] Spurious warning and crash when returning a reference from lambda
Date: Wed, 27 Apr 2016 14:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70121
Patrick Palka <ppalka at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #9 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Looks like this is a dup of PR c++/53157.
*** This bug has been marked as a duplicate of bug 53157 ***
>From gcc-bugs-return-523412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 14:20:02 2016
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Subject: =?UTF-8?B?W0J1ZyBjKysvNTMxNTddIHdpdGhpbiBsYW1iZGEsIGVycm9yOiBsdmFsdWUg?= =?UTF-8?B?cmVxdWlyZWQgYXMgdW5hcnkg4oCYJuKAmSBvcGVyYW5k?Date: Wed, 27 Apr 2016 14:20:00 -0000
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
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CC| |blastrock at free dot fr
--- Comment #3 from Patrick Palka <ppalka at gcc dot gnu.org> ---
*** Bug 70121 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 14:24:22 2016
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From: "dhowells at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70821] New: x86_64: __atomic_fetch_add/sub() uses XADD rather than DECL in some cases
Date: Wed, 27 Apr 2016 14:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70821
Bug ID: 70821
Summary: x86_64: __atomic_fetch_add/sub() uses XADD rather than
DECL in some cases
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: dhowells at redhat dot com
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Created attachment 38346
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38346&action=edit
Test program
__atomic_fetch_add/sub() uses XADD rather than DECL when subtracting 1 from the
counter if the result is acted upon, but where this could be done through the
condition flags. For instance:
static __always_inline bool atomic_sub_and_test(int i, atomic_t *v)
{
return __atomic_sub_fetch(&v->counter, i, __ATOMIC_SEQ_CST);
}
const char *test_atomic_dec_and_test(atomic_t *counter)
{
if (atomic_sub_and_test(1, counter))
return "foo";
return "bar";
}
produces:
17: 83 c8 ff or $0xffffffff,%eax
1a: f0 0f c1 07 lock xadd %eax,(%rdi)
1e: ba 00 00 00 00 mov $0x0,%edx
23: ff c8 dec %eax
25: b8 00 00 00 00 mov $0x0,%eax
2a: 48 0f 44 c2 cmove %rdx,%rax
2e: c3 retq
when it should produce something more like this, which I get when adding 1
instead of subtracting 1, but with a DECL rather than an INCL:
46: f0 ff 07 lock incl (%rdi)
49: ba 00 00 00 00 mov $0x0,%edx
4e: b8 00 00 00 00 mov $0x0,%eax
53: 48 0f 44 c2 cmove %rdx,%rax
57: c3 retq
Note that adding or subtracting 2 and testing the zeroness of the result gives
SUBL/ADDL as expected. If the result is not tested, DECL is generated as
expected:
13: f0 ff 0f lock decl (%rdi)
16: c3 retq
See the attached test program.
This is the case for both:
gcc version 5.3.1 20151207 (Red Hat 5.3.1-2) (GCC)
gcc version 6.0.0 20160219 (Red Hat Cross 6.0.0-0.1) (GCC)
The following version of gcc:
gcc version 4.8.5 20150623 (Red Hat 4.8.5-2.x) (GCC)
also produces XADD rather than INCL/DECL/ADDL/SUBL if the result is looked at
at all.
>From gcc-bugs-return-523415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 14:27:52 2016
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Subject: =?UTF-8?B?W0J1ZyBjKysvNzA4MjJdIE5ldzogYm9ndXMgImVycm9yOiBsdmFsdWUgcmVx?= =?UTF-8?B?dWlyZWQgYXMgdW5hcnkg4oCYJuKAmSBvcGVyYW5kIiB3aXRoIEMrKzE0IHBh?= =?UTF-8?B?cmVudGhlc2l6ZWQgU0NPUEVfUkVG?Date: Wed, 27 Apr 2016 14:27:00 -0000
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Bug ID: 70822
Summary: bogus "error: lvalue required as unary ‘&’ operand"
with C++14 parenthesized SCOPE_REF
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$ cat scope.cc
struct a
{
static int b;
};
template <typename>
void
foo ()
{
&(a::b);
}
$ g++ -std=c++14 scope.cc
scope.cc: In function ‘void foo()’:
scope.cc:10:9: error: lvalue required as unary ‘&’ operand
&(a::b);
>From gcc-bugs-return-523416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 14:40:15 2016
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Subject: [Bug target/70823] New: x86_64: __atomic_fetch_and/or/xor() should perhaps use BTR/BTS/BTC if they can
Date: Wed, 27 Apr 2016 14:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70823
Bug ID: 70823
Summary: x86_64: __atomic_fetch_and/or/xor() should perhaps use
BTR/BTS/BTC if they can
Product: gcc
Version: 6.0
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Created attachment 38347
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38347&action=edit
Test source
If given a mask that clears, sets or flips a single bit and the result is
checked for just that bit and reduced to bool, then the __atomic_fetch_and, _or
and _xor functions should consider using BTR, BTS or BTC as appropriate.
So, something like:
static __always_inline bool test_and_set_bit(unsigned bit, unsigned long
*ptr)
{
unsigned long mask = 1UL << (bit & (BITS_PER_LONG - 1));
unsigned long old;
ptr += bit / BITS_PER_LONG;
old = __atomic_fetch_or(ptr, mask, __ATOMIC_SEQ_CST);
return old & mask;
}
where the mask is constructed by 1UL << bitnr. As things stand, for the
example above, the result ends up with a CMPXCHG loop rather a BTS instruction:
b: 89 f9 mov %edi,%ecx
d: ba 01 00 00 00 mov $0x1,%edx
12: c1 ef 06 shr $0x6,%edi
15: 48 d3 e2 shl %cl,%rdx
18: 89 f9 mov %edi,%ecx
1a: 48 8b 04 ce mov (%rsi,%rcx,8),%rax
1e: 49 89 c0 mov %rax,%r8
21: 48 89 c7 mov %rax,%rdi
24: 49 09 d0 or %rdx,%r8
27: f0 4c 0f b1 04 ce lock cmpxchg %r8,(%rsi,%rcx,8)
2d: 75 ef jne 1e <set_bit+0x13>
2f: 48 85 fa test %rdi,%rdx
32: 0f 95 c0 setne %al
35: c3 retq
Could we instead get something like:
bts %edi,(%rsi)
setne %al
retq
See the attached test source which should be compiled to a .s file.
This is the case for all of:
gcc version 5.3.1 20151207 (Red Hat 5.3.1-2) (GCC)
gcc version 6.0.0 20160219 (Red Hat Cross 6.0.0-0.1) (GCC)
gcc version 4.8.5 20150623 (Red Hat 4.8.5-2.x) (GCC)
>From gcc-bugs-return-523417-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 14:46:42 2016
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70820] GCC incorrectly accepts code that accesses nested names in an incomplete type
Date: Wed, 27 Apr 2016 14:46:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
14.7.1: "The implicit instantiation of a class template specialization causes
the implicit instantiation of the declarations, but not of the definitions,
default arguments, or exception-specifications of the class member functions,
member classes, scoped member enumerations, static data members and member
templates; and it causes the implicit instantiation of the definitions of
unscoped member enumerations and member anonymous unions."
So I don't think that the instantiation of Base<Derived> requires the
instantiation of the definition of Base<Derived>::i.
>From gcc-bugs-return-523418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 14:55:53 2016
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Subject: [Bug libstdc++/70766] stream iterators, shared_lock, and atomic<T> should all use addressof and not &
Date: Wed, 27 Apr 2016 14:55:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-523419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 15:16:03 2016
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Subject: [Bug fortran/70817] Internal compiler error coarrays -finit-real=snan
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70817
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-27
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.7 up to trunk (7.0) when using -fcoarray=lib. The code
compiles when using -fcoarray=single.
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From: "trulsjo at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70824] New: cc1plus consumes all available memory on specific template code
Date: Wed, 27 Apr 2016 15:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70824
Bug ID: 70824
Summary: cc1plus consumes all available memory on specific
template code
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: trulsjo at gmail dot com
Target Milestone: ---
Created attachment 38348
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38348&action=edit
Prerocessed source for failed compile
Compiling this code with g++ 6.1.0 causes cc1plus to consume all available
memory (or at least more than 12GB):
#include <algorithm>
template <class Src>
size_t
a() {
const int v = std::max({1});
return v;
}
Compiled with
g++ TJOTest.cpp -c --save-temps
gcc version is 6.1.0 release, compiled on Ubuntu 16.04 system with ./configure
&& make && make install
The same code compiles successfully on stock compiler in Ubuntu 16.04 (g++
5.3.1-14ubuntu2) 5.3.1 20160413
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Subject: [Bug target/70825] New: x86_64: __atomic_compare_exchange_n() accesses stack unnecessarily
Date: Wed, 27 Apr 2016 15:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70825
Bug ID: 70825
Summary: x86_64: __atomic_compare_exchange_n() accesses stack
unnecessarily
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Created attachment 38349
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38349&action=edit
Example code
__atomic_compare_exchange_n() stores the 'expected' value and, if not
discarded, the old value on the stack rather than in a register and then may
immediately retrieve the old value from there back into the register from
whence it just came.
For example:
static __always_inline int atomic_cmpxchg(atomic_t *v, int old, int new)
{
int cur = old;
if (__atomic_compare_exchange_n(&v->counter, &cur, new, false,
__ATOMIC_SEQ_CST,
__ATOMIC_RELAXED))
return cur;
return cur;
}
void test_atomic_cmpxchg(atomic_t *counter)
{
atomic_cmpxchg(counter, 23, 42);
}
produces:
0: ba 2a 00 00 00 mov $0x2a,%edx
5: b8 17 00 00 00 mov $0x17,%eax
a: c7 44 24 fc 17 00 00 movl $0x17,-0x4(%rsp)
11: 00
12: f0 0f b1 17 lock cmpxchg %edx,(%rdi)
16: c3 retq
Note line a where 0x17 is stored at -04(%rsp) unnecessarily (the value is
dicarded). Note also that this value is in %eax at the time and could be saved
from there rather than using an immediate operand.
And then:
int test_atomic_cmpxchg_2(atomic_t *counter)
{
return atomic_cmpxchg(counter, 23, 42);
}
where the value is returned, we get something like:
20: ba 2a 00 00 00 mov $0x2a,%edx
25: b8 17 00 00 00 mov $0x17,%eax
2a: c7 44 24 fc 17 00 00 movl $0x17,-0x4(%rsp)
31: 00
32: f0 0f b1 17 lock cmpxchg %edx,(%rdi)
36: 74 04 je 3c <test_atomic_cmpxchg_2+0x1c>
38: 89 44 24 fc mov %eax,-0x4(%rsp)
3c: 8b 44 24 fc mov -0x4(%rsp),%eax
40: c3 retq
In this case, the return value is being constructed on the stack whereas the
value we actually want to return is in %eax at the conclusion of the CMPXCHG,
so lines 2a & 36-3c are redundant.
Changing atomic_cmpxchg() slightly:
static __always_inline int atomic_cmpxchg_B(atomic_t *v, int old, int new)
{
int cur = old;
if (__atomic_compare_exchange_n(&v->counter, &cur, new, false,
__ATOMIC_SEQ_CST,
__ATOMIC_RELAXED))
--> return old;
return cur;
}
does generate code that's somewhat better:
a0: ba 2a 00 00 00 mov $0x2a,%edx
a5: b8 17 00 00 00 mov $0x17,%eax
aa: c7 44 24 fc 17 00 00 movl $0x17,-0x4(%rsp)
b1: 00
b2: f0 0f b1 17 lock cmpxchg %edx,(%rdi)
b6: ba 17 00 00 00 mov $0x17,%edx
bb: 0f 45 d0 cmovne %eax,%edx
be: 89 d0 mov %edx,%eax
c0: c3 retq
However, given the fact that old == cur must hold true if the CMPXCHG
succeeded, lines b6-be are redundant. Note that the unnecessary store (line
aa) is still there.
Note that clang does somewhat better than gcc:
50: b9 2a 00 00 00 mov $0x2a,%ecx
55: b8 17 00 00 00 mov $0x17,%eax
5a: f0 0f b1 0f lock cmpxchg %ecx,(%rdi)
5e: c3 retq
5f: 90 nop
See the attached example code which should be compiled to a .s file.
This is the case for all of:
gcc version 5.3.1 20151207 (Red Hat 5.3.1-2) (GCC)
gcc version 6.0.0 20160219 (Red Hat Cross 6.0.0-0.1) (GCC)
gcc version 4.8.5 20150623 (Red Hat 4.8.5-2.x) (GCC)
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Subject: [Bug fortran/70815] ICE when using read statement applied to deferred-length string pointer as derived type component
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70815
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Blocks| |68241
Resolution|--- |DUPLICATE
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Fixed on 6.1 and trunk (7.0) between revisions r228467 (2015-10-05, ICE) and
r228566 (2015-10-07, OK), likely r228551 (pr65766). Closing as duplicate.
*** This bug has been marked as a duplicate of bug 65766 ***
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
[Bug 68241] [meta-bug] Deferred-length character
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Subject: [Bug fortran/65766] gFortran Compiler SEGFAULTING on compiling simple program
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
CC| |pvdp.bugzilla at gmail dot com
--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 70815 has been marked as a duplicate of this bug. ***
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Subject: [Bug fortran/68241] [meta-bug] Deferred-length character
Date: Wed, 27 Apr 2016 15:38:00 -0000
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Bug 68241 depends on bug 70815, which changed state.
Bug 70815 Summary: ICE when using read statement applied to deferred-length string pointer as derived type component
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70815
What |Removed |Added
----------------------------------------------------------------------------
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From: "seurer at linux dot vnet.ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70826] New: [7 regression] many test cases fail starting with r235442
Date: Wed, 27 Apr 2016 15:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70826
Bug ID: 70826
Summary: [7 regression] many test cases fail starting with
r235442
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
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Target Milestone: ---
Note: For at least some of the guality test case failures I have some doubt
that the test cases are valid. But there are a few non-guality ones.
New failures:
FAIL: gcc.dg/guality/nrv-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 20 a2.i[0] == 42
FAIL: gcc.dg/guality/pr36728-1.c -O2 line 18 *x == (char) 25
FAIL: gcc.dg/guality/pr36728-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 18 *x == (char) 25
FAIL: gcc.dg/guality/pr36728-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 18 y == 2
FAIL: gcc.dg/guality/pr36728-1.c -O3 -g line 18 *x == (char) 25
FAIL: gcc.dg/guality/pr36728-1.c -Os line 18 y == 2
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 18 *x == (char) 25
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 18 y == 2
FAIL: gcc.dg/guality/pr36728-2.c -Os line 18 *x == (char) 25
FAIL: gcc.dg/guality/pr36728-3.c -O2 line 14 y == 2
FAIL: gcc.dg/guality/pr36728-3.c -O2 line 16 y == 2
FAIL: gcc.dg/guality/pr36728-3.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 14 y == 2
FAIL: gcc.dg/guality/pr36728-3.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 16 y == 2
FAIL: gcc.dg/guality/pr36728-3.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 14 y == 2
FAIL: gcc.dg/guality/pr36728-3.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 y == 2
FAIL: gcc.dg/guality/pr36728-3.c -O3 -g line 14 y == 2
FAIL: gcc.dg/guality/pr36728-3.c -O3 -g line 16 y == 2
FAIL: gcc.dg/guality/pr36728-3.c -Os line 14 y == 2
FAIL: gcc.dg/guality/pr36728-3.c -Os line 16 y == 2
FAIL: gcc.dg/guality/pr36728-4.c -O2 line 14 y == 2
FAIL: gcc.dg/guality/pr36728-4.c -O2 line 16 y == 2
FAIL: gcc.dg/guality/pr36728-4.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 14 y == 2
FAIL: gcc.dg/guality/pr36728-4.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 16 y == 2
FAIL: gcc.dg/guality/pr36728-4.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 14 y == 2
FAIL: gcc.dg/guality/pr36728-4.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 y == 2
FAIL: gcc.dg/guality/pr36728-4.c -O3 -g line 14 y == 2
FAIL: gcc.dg/guality/pr36728-4.c -O3 -g line 16 y == 2
FAIL: gcc.dg/guality/pr36728-4.c -Os line 14 y == 2
FAIL: gcc.dg/guality/pr36728-4.c -Os line 16 y == 2
FAIL: gcc.dg/guality/pr68860-1.c -O2 line 14 y == 2
FAIL: gcc.dg/guality/pr68860-1.c -O2 line 16 y == 2
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 14 y == 2
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 16 y == 2
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 14 y == 2
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 y == 2
FAIL: gcc.dg/guality/pr68860-1.c -O3 -g line 14 y == 2
FAIL: gcc.dg/guality/pr68860-1.c -O3 -g line 16 y == 2
FAIL: gcc.dg/guality/pr68860-1.c -Os line 14 y == 2
FAIL: gcc.dg/guality/pr68860-1.c -Os line 16 y == 2
FAIL: gcc.dg/guality/pr68860-2.c -O2 line 14 y == 2
FAIL: gcc.dg/guality/pr68860-2.c -O2 line 16 y == 2
FAIL: gcc.dg/guality/pr68860-2.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 14 y == 2
FAIL: gcc.dg/guality/pr68860-2.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 16 y == 2
FAIL: gcc.dg/guality/pr68860-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 14 y == 2
FAIL: gcc.dg/guality/pr68860-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 y == 2
FAIL: gcc.dg/guality/pr68860-2.c -O3 -g line 14 y == 2
FAIL: gcc.dg/guality/pr68860-2.c -O3 -g line 16 y == 2
FAIL: gcc.dg/guality/pr68860-2.c -Os line 14 y == 2
FAIL: gcc.dg/guality/pr68860-2.c -Os line 16 y == 2
FAIL: gcc.target/powerpc/savres.c -O2 execution test
FAIL: gcc.target/powerpc/savres.c -O2 -mno-multiple execution test
FAIL: gcc.target/powerpc/savres.c -Os execution test
FAIL: gcc.target/powerpc/savres.c -Os -mno-multiple execution test
New passes:
FAIL: gcc.dg/guality/pr36728-1.c -O2 line 18 y == 2
FAIL: gcc.dg/guality/pr36728-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 18 y == 2
FAIL: gcc.dg/guality/pr36728-2.c -Os line 18 y == 2
FAIL: gcc.dg/guality/sra-1.c -O2 line 43 a.j == 14
FAIL: gcc.dg/guality/sra-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 43 a.j == 14
FAIL: gcc.dg/guality/sra-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 43 a.j == 14
FAIL: gcc.dg/guality/sra-1.c -O3 -g line 43 a.j == 14
FAIL: gcc.dg/guality/sra-1.c -Os line 43 a.j == 14
FAIL: gfortran.dg/unknown_commons.f -O scan-tree-dump-not dom2 "FIND"
FAIL: gfortran.dg/unknown_commons.f -O scan-tree-dump-times dom2 "
mycommon\\.x\\[_[0-9]+\\] = _[0-9]+;" 1
>From gcc-bugs-return-523428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 16:00:43 2016
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Subject: [Bug sanitizer/70342] g++ -fsanitize=undefined never finishes compiling (>24h) in qtxmlpatterns test suite
Date: Wed, 27 Apr 2016 16:00:00 -0000
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--- Comment #8 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
So it seems this fixes this problem:
diff --git a/gcc/c-family/c-ubsan.c b/gcc/c-family/c-ubsan.c
index 4022bdf..b829c04 100644
--- a/gcc/c-family/c-ubsan.c
+++ b/gcc/c-family/c-ubsan.c
@@ -395,8 +395,11 @@ ubsan_maybe_instrument_reference_or_call (location_t loc,
tree op, tree ptype,
int save_flag_delete_null_pointer_checks
= flag_delete_null_pointer_checks;
flag_delete_null_pointer_checks = 1;
- if (!tree_single_nonzero_warnv_p (op, &strict_overflow_p)
- || strict_overflow_p)
+ if ((!tree_single_nonzero_warnv_p (op, &strict_overflow_p)
+ || strict_overflow_p)
+ /* Instrumenting &TARGET_EXPR <...> is a waste and can result
+ in compile-time hog; see PR70342. */
+ && TREE_CODE (TREE_OPERAND (op, 0)) != TARGET_EXPR)
instrument = true;
flag_delete_null_pointer_checks
= save_flag_delete_null_pointer_checks;
>From gcc-bugs-return-523426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 16:00:32 2016
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Subject: [Bug target/70823] x86_64: __atomic_fetch_and/or/xor() should perhaps use BTR/BTS/BTC if they can
Date: Wed, 27 Apr 2016 16:00:00 -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|--- |DUPLICATE
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Resolving as a duplicate of bug 49244.
*** This bug has been marked as a duplicate of bug 49244 ***
>From gcc-bugs-return-523427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 16:00:43 2016
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
Date: Wed, 27 Apr 2016 16:00:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dhowells at redhat dot com
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 70823 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 16:08:25 2016
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Subject: [Bug rtl-optimization/70826] [7 regression] many test cases fail starting with r235442
Date: Wed, 27 Apr 2016 16:08:00 -0000
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--- Comment #1 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
So the only non-guality failure is powerpc/savres.c? Is there a way to reduce
this a bit, and also provide an (ideally reduced) preprocessed version that
exhibits the failure?
>From gcc-bugs-return-523430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 16:18:21 2016
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
Date: Wed, 27 Apr 2016 16:18:00 -0000
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--- Comment #6 from dhowells at redhat dot com <dhowells at redhat dot com> ---
I'm looking to implement Linux kernel atomics with C++-11 intrinsics, so being
able to reduce a CMPXCHG-loop to BTR/BTS/BTC would be really handy.
>From gcc-bugs-return-523431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 16:39:10 2016
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From: "lucdanton at free dot fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70827] New: [6 regression] dubious use of deleted function in inherited constructor
Date: Wed, 27 Apr 2016 16:39:00 -0000
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Bug ID: 70827
Summary: [6 regression] dubious use of deleted function in
inherited constructor
Product: gcc
Version: 6.0
Status: UNCONFIRMED
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Priority: P3
Component: c++
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Target Milestone: ---
struct move_only {
move_only() = default;
move_only(move_only&&) = default;
};
struct base {
base(move_only) {}
};
struct derived: base {
// error: use of deleted function 'constexpr move_only::move_only(const
move_only&)'
using base::base;
};
int main()
{
// note: synthesized method 'derived::derived(move_only)' first required
here
derived h(move_only {});
}
=====
Using GCC 6.1:
$ g++-trunk --version
g++-trunk (GCC) 6.1.0
Copyright (C) 2016 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.
$ g++-trunk -std=c++11 main.cpp
main.cpp: In constructor 'derived::derived(move_only)':
main.cpp:12:17: error: use of deleted function 'constexpr
move_only::move_only(const move_only&)'
using base::base;
^~~~
main.cpp:1:8: note: 'constexpr move_only::move_only(const move_only&)' is
implicitly declared as deleted because 'move_only' declares a move constructor
or move assignment operator
struct move_only {
^~~~~~~~~
main.cpp: In function 'int main()':
main.cpp:18:27: note: synthesized method 'derived::derived(move_only)' first
required here
derived h(move_only {});
=====
The program compiles fine with 5.3.1, earlier 6 snapshots, and Clang.
>From gcc-bugs-return-523432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 17:05:54 2016
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Subject: [Bug rtl-optimization/70826] [7 regression] many test cases fail starting with r235442
Date: Wed, 27 Apr 2016 17:05:00 -0000
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--- Comment #2 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
I don't know the register-renames code at all -- does it update debug
information when it replaces registers? Sounds like gdb is getting stale
results for which register represents a memory value.
>From gcc-bugs-return-523433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 17:16:55 2016
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Subject: [Bug c++/70820] GCC incorrectly accepts code that accesses nested names in an incomplete type
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Fabio Rocha <fdrocha at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Fabio Rocha <fdrocha at gmail dot com> ---
(In reply to Jason Merrill from comment #1)
> 14.7.1: "The implicit instantiation of a class template specialization
> causes the implicit instantiation of the declarations, but not of the
> definitions, default arguments, or exception-specifications of the class
> member functions, member classes, scoped member enumerations, static data
> members and member templates; and it causes the implicit instantiation of
> the definitions of unscoped member enumerations and member anonymous unions."
>
> So I don't think that the instantiation of Base<Derived> requires the
> instantiation of the definition of Base<Derived>::i.
You may be correct, not sure this is actually bug.
Still, it feels pretty strange that uncommenting the "First Assert" is what
makes the code incorrect...
>From gcc-bugs-return-523434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 17:17:15 2016
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Subject: [Bug c++/70820] GCC incorrectly accepts code that accesses nested names in an incomplete type
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--- Comment #3 from Fabio Rocha <fdrocha at gmail dot com> ---
(In reply to Jason Merrill from comment #1)
> 14.7.1: "The implicit instantiation of a class template specialization
> causes the implicit instantiation of the declarations, but not of the
> definitions, default arguments, or exception-specifications of the class
> member functions, member classes, scoped member enumerations, static data
> members and member templates; and it causes the implicit instantiation of
> the definitions of unscoped member enumerations and member anonymous unions."
>
> So I don't think that the instantiation of Base<Derived> requires the
> instantiation of the definition of Base<Derived>::i.
You may be correct, not sure this is actually bug.
Still, it feels pretty strange that uncommenting the "First Assert" is what
makes the code incorrect...
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Subject: [Bug target/70155] Use SSE for TImode load/store
Date: Wed, 27 Apr 2016 17:33:00 -0000
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--- Comment #5 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Wed Apr 27 17:32:40 2016
New Revision: 235518
URL: https://gcc.gnu.org/viewcvs?rev=235518&root=gcc&view=rev
Log:
Extend STV pass to 64-bit mode
128-bit SSE load and store instructions can be used for load and store
of 128-bit integers if they are the only operations on 128-bit integers.
To convert load and store of 128-bit integers to 128-bit SSE load and
store, the original STV pass, which is designed to convert 64-bit integer
operations to SSE2 operations in 32-bit mode, is extended to 64-bit mode
in the following ways:
1. Class scalar_chain is turned into base class. The 32-bit specific
member functions are moved to the new derived class, dimode_scalar_chain.
The new derived class, timode_scalar_chain, is added to convert oad and
store of 128-bit integers to 128-bit SSE load and store.
2. Add the 64-bit version of scalar_to_vector_candidate_p and
remove_non_convertible_regs. Only TImode load and store are allowed
for conversion. If one instruction on the chain of dependent
instructions aren't TImode load or store, the chain of instructions
won't be converted.
3. In 64-bit, we only convert from TImode to V1TImode, which have the
same size. The difference is only vector registers are allowed in
TImode so that 128-bit SSE load and store instructions will be used
for load and store of 128-bit integers.
4. Put the 64-bit STV pass before the CSE pass so that instructions
changed or generated by the STV pass can be CSEed.
convert_scalars_to_vector calls free_dominance_info in 64-bit mode to
work around ICE in fwprop pass:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70807
when building libgcc on Linux/x86-64.
gcc/
PR target/70155
* config/i386/i386.c (scalar_to_vector_candidate_p): Renamed
to ...
(dimode_scalar_to_vector_candidate_p): This.
(timode_scalar_to_vector_candidate_p): New function.
(scalar_to_vector_candidate_p): Likewise.
(timode_check_non_convertible_regs): Likewise.
(timode_remove_non_convertible_regs): Likewise.
(remove_non_convertible_regs): Likewise.
(remove_non_convertible_regs): Renamed to ...
(dimode_remove_non_convertible_regs): This.
(scalar_chain::~scalar_chain): Make it virtual.
(scalar_chain::compute_convert_gain): Make it pure virtual.
(scalar_chain::mark_dual_mode_def): Likewise.
(scalar_chain::convert_insn): Likewise.
(scalar_chain::convert_registers): Likewise.
(scalar_chain::add_to_queue): Make it protected.
(scalar_chain::emit_conversion_insns): Likewise.
(scalar_chain::replace_with_subreg): Likewise.
(scalar_chain::replace_with_subreg_in_insn): Likewise.
(scalar_chain::convert_op): Likewise.
(scalar_chain::convert_reg): Likewise.
(scalar_chain::make_vector_copies): Likewise.
(scalar_chain::convert_registers): New pure virtual function.
(class dimode_scalar_chain): New class.
(class timode_scalar_chain): Likewise.
(scalar_chain::mark_dual_mode_def): Renamed to ...
(dimode_scalar_chain::mark_dual_mode_def): This.
(timode_scalar_chain::mark_dual_mode_def): New function.
(timode_scalar_chain::convert_insn): Likewise.
(dimode_scalar_chain::convert_registers): Likewise.
(scalar_chain::compute_convert_gain): Renamed to ...
(dimode_scalar_chain::compute_convert_gain): This.
(scalar_chain::replace_with_subreg): Renamed to ...
(dimode_scalar_chain::replace_with_subreg): This.
(scalar_chain::replace_with_subreg_in_insn): Renamed to ...
(dimode_scalar_chain::replace_with_subreg_in_insn): This.
(scalar_chain::make_vector_copies): Renamed to ...
(dimode_scalar_chain::make_vector_copies): This.
(scalar_chain::convert_reg): Renamed to ...
(dimode_scalar_chain::convert_reg ): This.
(scalar_chain::convert_op): Renamed to ...
(dimode_scalar_chain::convert_op): This.
(scalar_chain::convert_insn): Renamed to ...
(dimode_scalar_chain::convert_insn): This.
(scalar_chain::convert): Call convert_registers.
(convert_scalars_to_vector): Change to scalar_chain pointer to
use timode_scalar_chain in 64-bit mode and dimode_scalar_chain
in 32-bit mode. Delete scalar_chain pointer. Call
free_dominance_info in 64-bit mode.
(pass_stv::gate): Remove TARGET_64BIT check.
(ix86_option_override): Put the 64-bit STV pass before the CSE
pass.
gcc/testsuite/
PR target/70155
* gcc.target/i386/pr55247-2.c: Updated to check movti_internal
and movv1ti_internal patterns
* gcc.target/i386/pr70155-1.c: New test.
* gcc.target/i386/pr70155-2.c: Likewise.
* gcc.target/i386/pr70155-3.c: Likewise.
* gcc.target/i386/pr70155-4.c: Likewise.
* gcc.target/i386/pr70155-5.c: Likewise.
* gcc.target/i386/pr70155-6.c: Likewise.
* gcc.target/i386/pr70155-7.c: Likewise.
* gcc.target/i386/pr70155-8.c: Likewise.
* gcc.target/i386/pr70155-9.c: Likewise.
* gcc.target/i386/pr70155-10.c: Likewise.
* gcc.target/i386/pr70155-11.c: Likewise.
* gcc.target/i386/pr70155-12.c: Likewise.
* gcc.target/i386/pr70155-13.c: Likewise.
* gcc.target/i386/pr70155-14.c: Likewise.
* gcc.target/i386/pr70155-15.c: Likewise.
* gcc.target/i386/pr70155-16.c: Likewise.
* gcc.target/i386/pr70155-17.c: Likewise.
* gcc.target/i386/pr70155-18.c: Likewise.
* gcc.target/i386/pr70155-19.c: Likewise.
* gcc.target/i386/pr70155-20.c: Likewise.
* gcc.target/i386/pr70155-21.c: Likewise.
* gcc.target/i386/pr70155-22.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70155-1.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-10.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-11.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-12.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-13.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-14.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-15.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-16.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-17.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-18.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-19.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-2.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-20.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-21.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-22.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-3.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-4.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-5.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-6.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-7.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-8.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-9.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr55247-2.c
>From gcc-bugs-return-523437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 17:33:59 2016
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for GCC 7.
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Subject: [Bug rtl-optimization/70826] [7 regression] many test cases fail starting with r235442
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--- Comment #3 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
In theory debug_insns are updated by regrename.
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 38350
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38350&action=edit
A patch to trigger ICE in fwprop pass on x86-64
>From gcc-bugs-return-523440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 17:45:21 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70807] fwprop pass ICE with incoming CDI_DOMINATORS
Date: Wed, 27 Apr 2016 17:45:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-27
Target Milestone|--- |7.0
Ever confirmed|0 |1
>From gcc-bugs-return-523441-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 18:19:06 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70828] New: broken array-type subarrays inside acc data in openacc
Date: Wed, 27 Apr 2016 18:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70828
Bug ID: 70828
Summary: broken array-type subarrays inside acc data in openacc
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
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Assignee: cesar at gcc dot gnu.org
Reporter: cesar at gcc dot gnu.org
CC: tschwinge at gcc dot gnu.org
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Created attachment 38351
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38351&action=edit
broken subarray
Given an array-typed subarray with a non-zero base element on an acc data
construct, the gimplifier will implicitly add a pcopy clause for any parallel
and kernels construct which uses that array. The pcopy is correct, but this
pcopy expects the entire array to be present on the accelerator. This
ultimately results in a runtime failure when the base of the subarray is not
element zero.
This problem can be reproduced with the attached test case in trunk and gcc-6.
>From gcc-bugs-return-523442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 18:33:57 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70826] [7 regression] many test cases fail starting with r235442
Date: Wed, 27 Apr 2016 18:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70826
--- Comment #4 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
From poking around in gdb it is dying on line 1078 in the code from the
VERIFY_CR macro (part of VERIFY_REGS) though "where" shows line 1070 for some
reason.
#ifndef __NO_FPRS__
b_all ();
VERIFY_REGS;
b_cvfr ();
VERIFY_REGS;
b_vfr ();
VERIFY_REGS;
b_cvf ();
VERIFY_REGS;
b_vf ();
VERIFY_REGS; // line 1078, dies here
#endif
#define VERIFY_CR ({ int tmp; __asm__ __volatile__ ("mfcr %0" : "=r" (tmp)); if
((tmp & ((15 << 20) | (15 << 16) | (15 << 12))) != ((6 << 20) | (7 << 16) | (8
<< 12))) abort (); })
(gdb) print /x tmp
$2 = 0x22278082
(gdb) print /x $cr
$4 = 0x22278082
After the bit manipulation the value in the CR comes out as 0x00278000 but it
is being compared to 0x00678000 and thus the abort.
>From gcc-bugs-return-523443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 18:43:44 2016
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From: "prathamesh3492 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70829] New: LTO bootstrap failure
Date: Wed, 27 Apr 2016 18:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70829
Bug ID: 70829
Summary: LTO bootstrap failure
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: prathamesh3492 at gcc dot gnu.org
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Hi,
LTO bootstrap fails for r235507.
Comparing stages 2 and 3
warning: gcc/cc1plus-checksum.o differs
warning: gcc/cc1-checksum.o differs
Bootstrap comparison failure!
There are a bunch of files that are differing.
The entire build log can be seen here:
http://people.linaro.org/~prathamesh.kulkarni/err
Could someone confirm this failure with LTO ?
I configured with: --enable-languages=c,c++,fortran
--with-build-config=bootstrap-lto --disable-werror.
Bootstrap without LTO succeeds.
Thanks,
Prathamesh
>From gcc-bugs-return-523444-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 20:09:16 2016
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From: "fabian@ritter-vogt.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70830] New: ARM interrupt attribute: push/pop do not support {reglist}^
Date: Wed, 27 Apr 2016 20:09:00 -0000
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Bug ID: 70830
Summary: ARM interrupt attribute: push/pop do not support
{reglist}^
Product: gcc
Version: unknown
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Using attribute((interrupt)) on a function that accesses a local and a global
variable causes gcc to emit broken assembly. It needs to be "ldm" instead of
pop.
Code:
long *a;
__attribute__((interrupt)) void fn1() {
for (int x; x;)
*(long *)8096384 = a[20 / x];
}
Output:
> >arm-none-eabi-gcc -c -Os test.c
> test.s: Assembler messages:
> test.s:47: Error: push/pop do not support {reglist}^ -- `pop {r0,r1,r2,r3,pc}^'
>From gcc-bugs-return-523445-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 20:23:52 2016
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From: "jeffbai at aosc dot xyz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/70831] New: FTBFS: Build fails with bootstrap-lto and profiledbootstrap
Date: Wed, 27 Apr 2016 20:23:00 -0000
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Bug ID: 70831
Summary: FTBFS: Build fails with bootstrap-lto and
profiledbootstrap
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: jeffbai at aosc dot xyz
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A build failure is observed today when I tested building GCC with both
./configure ... \
--with-build-config=bootstrap-lto
and
make profiledboostrap
The build fails when linking libmpx/mpxwrap target, detailed error is shown
below.
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/libmpx/mpxwrap/mpx_wrappers.c:520:1:
note: '__mpx_wrapper_strncat' was previously declared here
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/libmpx/mpxwrap/mpx_wrappers.c:520:1:
note: code may be misoptimized unless -fno-strict-aliasing is used
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/libmpx/mpxwrap/mpx_wrappers.c: In
function '__mpx_wrapper_malloc.chkp':
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/libmpx/mpxwrap/mpx_wrappers.c:35:9:
internal compiler error: in ultimate_transparent_alias_target, at varasm.c:1263
void *p = (void *)malloc (size);
^
0x592d11 ultimate_transparent_alias_target
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/varasm.c:1263
0xb68514 ultimate_transparent_alias_target
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/varasm.c:1472
0xb68514 make_decl_rtl(tree_node*)
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/varasm.c:1349
0x5fc4f2 rtx_for_function_call
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/calls.c:1819
0x5fc4f2 expand_call(tree_node*, rtx_def*, int)
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/calls.c:3152
0x6d95a3 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/expr.c:10589
0x6e2ae9 store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/expr.c:5406
0x6e383f expand_assignment(tree_node*, tree_node*, bool)
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/expr.c:5175
0x6087bc expand_call_stmt
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/cfgexpand.c:2658
0x6087bc expand_gimple_stmt_1
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/cfgexpand.c:3548
0x6087bc expand_gimple_stmt
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/cfgexpand.c:3714
0x60a155 expand_gimple_basic_block
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/cfgexpand.c:5720
0x60f006 execute
/var/lib/abbs/build/tmp.oxb17wrLIQ/gcc-6.1.0/gcc/cfgexpand.c:6335
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://github.com/AOSC-Dev/aosc-os-core> for instructions.
>From gcc-bugs-return-523446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 20:31:51 2016
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From: "jeffbai at aosc dot xyz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/70831] FTBFS: Build fails with bootstrap-lto and profiledbootstrap
Date: Wed, 27 Apr 2016 20:31:00 -0000
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--- Comment #1 from Jeff Bai <jeffbai at aosc dot xyz> ---
P.S.: Tried building with both GCC 5.3.0, and GCC 6.1.0.
>From gcc-bugs-return-523447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 20:35:47 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/69138] Woverflow not triggered for constexpr within template class
Date: Wed, 27 Apr 2016 20:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69138
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
Blocks| |55004
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I don't think the test case necessarily demonstrates a bug. The implicit
instantiation of B<int> that's triggered by the definition of an object of the
specialization "causes the implicit instantiation of the declarations, but not
of the definitions, [...] of the class [...] static data members; and
it causes the implicit instantiation of the definitions of unscoped member
enumerations and member anonymous unions."
That being said, I think the bug can be reproduced by instantiating (e.g., by
virtue of using) B<int>::small_within_templated_class, for example like so:
template <typename T>
class B {
static constexpr uint8_t small_within_templated_class = 0xFFFFFFFF;
};
constexpr uint8_t i = B<int>::small_within_templated_class;
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004
[Bug 55004] [meta-bug] constexpr issues
>From gcc-bugs-return-523448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 20:35:48 2016
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Subject: [Bug target/70763] Use SSE for DImode load/store
Date: Wed, 27 Apr 2016 20:35:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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>From gcc-bugs-return-523449-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 20:42:38 2016
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From: "law at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/69024] [cilkpus] cilk_spawn is broken for initializations with implicit conversion operators defined
Date: Wed, 27 Apr 2016 20:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69024
--- Comment #1 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Wed Apr 27 20:41:52 2016
New Revision: 235534
URL: https://gcc.gnu.org/viewcvs?rev=235534&root=gcc&view=rev
Log:
PR c++/69024
PR c++/68997
* cilk.c (cilk_ignorable_spawn_rhs_op): Change to external linkage.
(cilk_recognize_spawn): Renamed from recognize_spawn and change to
external linkage.
(cilk_detect_and_unwrap): Corresponding changes.
(extract_free_variables): Don't extract free variables from
AGGR_INIT_EXPR slot.
* c-common.h (cilk_ignorable_spawn_rhs_op): Prototype.
(cilk_recognize_spawn): Likewise.
PR c++/69024
PR c++/68997
* cp-gimplify.c (cp_gimplify_expr): Call
cilk_cp_detect_spawn_and_unwrap
instead of cilk_detect_spawn_and_unwrap.
* cp-cilkplus.c (is_conversion_operator_function_decl_p): New.
(find_spawn): New.
(cilk_cp_detect_spawn_and_unwrap): New.
* lambda.c: Include cp-cilkplus.h.
* parser.c: Include cp-cilkplus.h.
* cp-tree.h (cpp_validate_cilk_plus_loop): Move prototype into...
* cp-cilkpus.h: New file.
PR c++/69024
PR c++/68997
* g++.dg/cilk-plus/CK/pr68001.cc: Fix to not depend on broken
diagnostic.
* g++.dg/cilk-plus/CK/pr69024.cc: New test.
* g++.dg/cilk-plus/CK/pr68997.cc: New test.
Added:
trunk/gcc/cp/cp-cilkplus.h
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/pr68997.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/pr69024.cc
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.h
trunk/gcc/c-family/cilk.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-cilkplus.c
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/lambda.c
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/pr68001.cc
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From: "law at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/68997] [cilkplus] cilk_spawn is broken for functions that return a type with a custom copy or move constructor
Date: Wed, 27 Apr 2016 20:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68997
--- Comment #1 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Wed Apr 27 20:41:52 2016
New Revision: 235534
URL: https://gcc.gnu.org/viewcvs?rev=235534&root=gcc&view=rev
Log:
PR c++/69024
PR c++/68997
* cilk.c (cilk_ignorable_spawn_rhs_op): Change to external linkage.
(cilk_recognize_spawn): Renamed from recognize_spawn and change to
external linkage.
(cilk_detect_and_unwrap): Corresponding changes.
(extract_free_variables): Don't extract free variables from
AGGR_INIT_EXPR slot.
* c-common.h (cilk_ignorable_spawn_rhs_op): Prototype.
(cilk_recognize_spawn): Likewise.
PR c++/69024
PR c++/68997
* cp-gimplify.c (cp_gimplify_expr): Call
cilk_cp_detect_spawn_and_unwrap
instead of cilk_detect_spawn_and_unwrap.
* cp-cilkplus.c (is_conversion_operator_function_decl_p): New.
(find_spawn): New.
(cilk_cp_detect_spawn_and_unwrap): New.
* lambda.c: Include cp-cilkplus.h.
* parser.c: Include cp-cilkplus.h.
* cp-tree.h (cpp_validate_cilk_plus_loop): Move prototype into...
* cp-cilkpus.h: New file.
PR c++/69024
PR c++/68997
* g++.dg/cilk-plus/CK/pr68001.cc: Fix to not depend on broken
diagnostic.
* g++.dg/cilk-plus/CK/pr69024.cc: New test.
* g++.dg/cilk-plus/CK/pr68997.cc: New test.
Added:
trunk/gcc/cp/cp-cilkplus.h
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/pr68997.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/pr69024.cc
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.h
trunk/gcc/c-family/cilk.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-cilkplus.c
trunk/gcc/cp/cp-gimplify.c
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/lambda.c
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/pr68001.cc
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/69024] [cilkpus] cilk_spawn is broken for initializations with implicit conversion operators defined
Date: Wed, 27 Apr 2016 20:43:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |law at redhat dot com
Resolution|--- |FIXED
--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
Fixed by Ryan's patch on the trunk.
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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++/70344] [6 Regression] ICE on valid code at -O1 and above on x86_64-linux-gnu in adjust_temp_type, at cp/constexpr.c:1078
Date: Wed, 27 Apr 2016 20:43:00 -0000
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Zhendong Su <su at cs dot ucdavis.edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Resolution|FIXED |---
--- Comment #7 from Zhendong Su <su at cs dot ucdavis.edu> ---
The same ICE is still triggered with the current GCC trunk:
$ 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/7.0.0/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 7.0.0 20160426 (experimental) [trunk revision 235433] (GCC)
$
$ g++-trunk -O1 -c pr70344.cpp
pr70344.cpp: In instantiation of ‘constexpr int fn(T) [with T = Z]’:
pr70344.cpp:15:18: required from here
pr70344.cpp:13:1: internal compiler error: in adjust_temp_type, at
cp/constexpr.c:1136
}
^
0x89197a adjust_temp_type
../../gcc-source-trunk/gcc/cp/constexpr.c:1136
0x898797 cxx_bind_parameters_in_call
../../gcc-source-trunk/gcc/cp/constexpr.c:1210
0x898797 cxx_eval_call_expression
../../gcc-source-trunk/gcc/cp/constexpr.c:1397
0x89aa5d cxx_eval_constant_expression
../../gcc-source-trunk/gcc/cp/constexpr.c:3558
0x8a10e9 cxx_eval_outermost_constant_expr
../../gcc-source-trunk/gcc/cp/constexpr.c:4136
0x8a3f78 maybe_constant_value_1
../../gcc-source-trunk/gcc/cp/constexpr.c:4330
0x8a3f78 maybe_constant_value(tree_node*, tree_node*)
../../gcc-source-trunk/gcc/cp/constexpr.c:4354
0x87fad3 cp_fold
../../gcc-source-trunk/gcc/cp/cp-gimplify.c:2205
0x87f398 cp_fold_rvalue
../../gcc-source-trunk/gcc/cp/cp-gimplify.c:1894
0x87f398 cp_fold
../../gcc-source-trunk/gcc/cp/cp-gimplify.c:2083
0x88037e cp_fold_r
../../gcc-source-trunk/gcc/cp/cp-gimplify.c:940
0x1059734 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
../../gcc-source-trunk/gcc/tree.c:11531
0x6a2587 finish_function(int)
../../gcc-source-trunk/gcc/cp/decl.c:14712
0x70cf2a instantiate_decl(tree_node*, int, bool)
../../gcc-source-trunk/gcc/cp/pt.c:22035
0x75492b mark_used(tree_node*, int)
../../gcc-source-trunk/gcc/cp/decl2.c:5273
0x65d521 build_over_call
../../gcc-source-trunk/gcc/cp/call.c:7724
0x66ccff build_new_function_call(tree_node*, vec<tree_node*, va_gc,
vl_embed>**, bool, int)
../../gcc-source-trunk/gcc/cp/call.c:4169
0x808bf1 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**, bool,
bool, int)
../../gcc-source-trunk/gcc/cp/semantics.c:2461
0x782a99 cp_parser_postfix_expression
../../gcc-source-trunk/gcc/cp/parser.c:6904
0x78bdec cp_parser_unary_expression
../../gcc-source-trunk/gcc/cp/parser.c:7988
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.
$
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Subject: [Bug c++/68997] [cilkplus] cilk_spawn is broken for functions that return a type with a custom copy or move constructor
Date: Wed, 27 Apr 2016 20:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68997
Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #2 from Jeffrey A. Law <law at redhat dot com> ---
Fixed by Ryan's patch on the trunk.
>From gcc-bugs-return-523455-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 20:44:25 2016
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Wed, 27 Apr 2016 20:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69582
Bug 69582 depends on bug 68997, which changed state.
Bug 68997 Summary: [cilkplus] cilk_spawn is broken for functions that return a type with a custom copy or move constructor
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68997
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>From gcc-bugs-return-523452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 20:43:53 2016
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Subject: [Bug other/69582] [meta-bug] Cilk+
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Bug 69582 depends on bug 69024, which changed state.
Bug 69024 Summary: [cilkpus] cilk_spawn is broken for initializations with implicit conversion operators defined
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69024
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>From gcc-bugs-return-523456-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 20:45:50 2016
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Subject: [Bug target/70799] STV pass does not convert DImode shifts and rotates
Date: Wed, 27 Apr 2016 20:45:00 -0000
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--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #1)
> I've been also surprised that the STV pass punts on moves of constants into
> DImode registers, if it is not 0, sure, it has higher cost, because it needs
> to be loaded from memory, but in the end together with enough other DImode
> operations it can be still beneficial.
This is tracked in PR 70763.
>From gcc-bugs-return-523457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 21:49:45 2016
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Subject: [Bug c++/70832] New: move-assignment of lambdas calls copy-constructor for captures
Date: Wed, 27 Apr 2016 21:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70832
Bug ID: 70832
Summary: move-assignment of lambdas calls copy-constructor for
captures
Product: gcc
Version: 5.3.1
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Created attachment 38352
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38352&action=edit
testcase, compile with -std=c++14
Testcase attached, which compiles and produces correct output with clang++ 3.7.
Incorrect g++ diagnostic:
[pisto@localhost ~]$ g++ -std=c++14 test.cpp
test.cpp: In function ‘int main()’:
test.cpp:18:12: error: use of deleted function ‘main()::<lambda()>&
main()::<lambda()>::operator=(const main()::<lambda()>&)’
lambda = move(lambda_moved); //g++ tries to call copy constructor and
fails, clang++ 3.7 works
^
test.cpp:16:37: note: a lambda closure type has a deleted copy assignment
operator
auto lambda = [test = move(data)]{};
^
>From gcc-bugs-return-523458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 21:54:00 2016
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Subject: [Bug c++/70832] move-assignment of lambdas calls copy-assignment for captures
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--- Comment #1 from Lorenzo Pistone <blaffablaffa at gmail dot com> ---
correction, it calls the copy assignment operator, not the copy constructor.
>From gcc-bugs-return-523459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 22:07:46 2016
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Subject: [Bug c++/70820] GCC incorrectly accepts code that accesses nested names in an incomplete type
Date: Wed, 27 Apr 2016 22:07:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Fabio Rocha from comment #3)
> Still, it feels pretty strange that uncommenting the "First Assert" is what
> makes the code incorrect...
That's not strange at all, the assertion requires the value of the static data
member, so it causes it to be instantiated, while the type is incomplete.
Without that assertion the static data member is not instantiated until the
definition of ::k, after the types are complete.
>From gcc-bugs-return-523460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 22:16:00 2016
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From: "alfredo.pons at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70833] New: All versions g++ 5.3.1 and and previous fails compiling with rpi3 and option -march=native
Date: Wed, 27 Apr 2016 22:15:00 -0000
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Bug ID: 70833
Summary: All versions g++ 5.3.1 and and previous fails
compiling with rpi3 and option -march=native
Product: gcc
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All versions g++ 5.3.1 and previous (gcc 5.6 I don't known) fails compiling
with Raspberry PI 3 CPU (BCM2709) and option -march=native
*** Error in `g++': double free or corruption (top): 0x001a8e30 ***
With rpi1 and rpi2 the
With architecture i386 and CroosDebootstrap (qemu & chroot:
https://wiki.debian.org/EmDebian/CrossDebootstrap) fails too.
>From gcc-bugs-return-523461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 22:36:56 2016
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70465] [4.9/5/6/7 Regression] Poor code for x87 asm
Date: Wed, 27 Apr 2016 22:36:00 -0000
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--- Comment #10 from Jeffrey A. Law <law at redhat dot com> ---
Coming back to Uros's c#5, the more I think about it, that's the solution.
reg-stack ought to be able to use dependency information to determine if it
can swap two insns rather than inserting a fxchg.
I'm not actually working on this, but wanted to make sure anyone looking at
this in the future is aware that Uros's suggestion is, IMHO, the right way to
go.
>From gcc-bugs-return-523463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 23:25:35 2016
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Subject: [Bug target/70833] All versions g++ 5.3.1 and and previous fails compiling with rpi3 and option -march=native
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70833
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Component|c++ |target
Resolution|--- |DUPLICATE
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 70132.
*** This bug has been marked as a duplicate of bug 70132 ***
>From gcc-bugs-return-523462-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Apr 27 23:25:35 2016
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Subject: [Bug driver/70132] ARM -mcpu=native can cause a double free abort.
Date: Wed, 27 Apr 2016 23:25:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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CC| |alfredo.pons at gmail dot com
--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 70833 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 02:20:41 2016
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From: "matt at godbolt dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70834] New: Incorrect warning for placement new when conditionally used
Date: Thu, 28 Apr 2016 02:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70834
Bug ID: 70834
Summary: Incorrect warning for placement new when conditionally
used
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: matt at godbolt dot org
Target Milestone: ---
Consider some code which tries to placement-new into an internal buffer (if the
object fits), else uses the heap:
--
#include <new>
struct Test {
char buf[4];
template<typename T> T *construct() {
if (sizeof(T) <= sizeof(buf))
return new ((void*)&buf)T; // if it fits, use the buf
else return new T; // else make it on the heap
}
};
void t1(Test &t) {
t.construct<int>();
}
void t2(Test &t) {
t.construct<double>();
}
-- (also at https://godbolt.org/g/p5Lpnz)
GCC 6.1 correctly generates code in t2 to use the "new T", and placement new
code for t1.
However, there's a spurious warning: placement new constructing an object of
type 'double' and size '8' in a region of type 'char [4]' and size '4'
[-Wplacement-new=] - which is not the case in this code. In code I'm now
compiling I've been able to #pragma this warning off. I'll try and resort to
template trickery to dispatch on the sizeof(), but early attempts also caused
the warning too, so it may be the case this warning's tough to work around.
>From gcc-bugs-return-523464-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 02:20:13 2016
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Subject: [Bug c++/56485] [cilkplus] internal compiler error: in cdtor_comdat_group, at cp/optimize.c: 186
Date: Thu, 28 Apr 2016 02:20:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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Ever confirmed|0 |1
>From gcc-bugs-return-523466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 03:47:04 2016
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From: "nunya223bidness at streetwisemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70836] New: internal compiler error on libiberty/floatformat.c when bootstrapping 5.3.0 with 5.3.0
Date: Thu, 28 Apr 2016 03:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70836
Bug ID: 70836
Summary: internal compiler error on libiberty/floatformat.c
when bootstrapping 5.3.0 with 5.3.0
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: nunya223bidness at streetwisemail dot com
Target Milestone: ---
Created attachment 38353
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38353&action=edit
tar.xz of build-x86_64-unknown-linux-gnu/libiberty/*.i
../gcc-5.3.0/configure --prefix=/usr/local
--with-native-system-header-files=/opt/include:/volume1/mmt/x-tools/x86_64-unknown-linux-gnu/include
--enable-bootstrap --enable-lto --with-{gmp,mpc,mpfr,isl}=/usr/local
--with-gnu-ld --enable-twoprocess --enable-gather-detailed-mem-stats
--enable-multilib --enable-multiarch --enable-decimal-float=yes
--enable-fixed-point --enable-plugin --disable-dependency-tracking
--disable-nls --disable-canonical-system-headers --with-glibc-version=2.20
--without-cuda-driver --enable-languages=c,c++
--with-build-time-tools=/usr/local --with-build-libsubdir=lib CFLAGS="-v
-save-temps" ; make
[ -f stage_final ] || echo stage3 > stage_final
make[1]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
make[2]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
make[3]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
rm -f stage_current
make[3]: Leaving directory '/volume1/local/src/gcc-5.3.0-build'
make[2]: Leaving directory '/volume1/local/src/gcc-5.3.0-build'
make[2]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
make[3]: Entering directory '/volume1/local/src/gcc-5.3.0-build/libiberty'
if [ x"-fpic" != x ]; then \
gcc -c -DHAVE_CONFIG_H -g -I. -I../../gcc-5.3.0/libiberty/../include -W
-Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic -fpic
../../gcc-5.3.0/libiberty/floatformat.c -o pic/floatformat.o; \
else true; fi
GNU MP: Cannot allocate memory (size=4611686018427387859)
../../gcc-5.3.0/libiberty/floatformat.c: In function 'floatformat_to_double':
../../gcc-5.3.0/libiberty/floatformat.c:529:2: internal compiler error: Aborted
dto = ldexp (1.0, exponent);
^
0x9bed4f crash_signal
../../gcc-5.3.0/gcc/toplev.c:383
0x93c390 real_from_mpfr(real_value*, __mpfr_struct const*, tree_node*,
mpfr_rnd_t)
../../gcc-5.3.0/gcc/realmpfr.c:92
0x939b49 real_from_string(real_value*, char const*)
../../gcc-5.3.0/gcc/real.c:2073
0x93a3bc real_from_string3(real_value*, char const*, machine_mode)
../../gcc-5.3.0/gcc/real.c:2123
0x6576a3 interpret_float
../../gcc-5.3.0/gcc/c-family/c-lex.c:897
0x65834c c_lex_with_flags(tree_node**, unsigned int*, unsigned char*, int)
../../gcc-5.3.0/gcc/c-family/c-lex.c:442
0x602fef c_lex_one_token
../../gcc-5.3.0/gcc/c/c-parser.c:258
0x613d1a c_parser_peek_token
../../gcc-5.3.0/gcc/c/c-parser.c:440
0x613d1a c_parser_next_token_is
../../gcc-5.3.0/gcc/c/c-parser.c:452
0x613d1a c_parser_postfix_expression_after_primary
../../gcc-5.3.0/gcc/c/c-parser.c:7865
0x60e067 c_parser_postfix_expression
../../gcc-5.3.0/gcc/c/c-parser.c:7715
0x61031a c_parser_unary_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6602
0x610e8f c_parser_cast_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6440
0x611072 c_parser_binary_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6255
0x611ba5 c_parser_conditional_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6031
0x611ff0 c_parser_expr_no_commas
../../gcc-5.3.0/gcc/c/c-parser.c:5949
0x61206a c_parser_expr_no_commas
../../gcc-5.3.0/gcc/c/c-parser.c:5991
0x6124e2 c_parser_expression
../../gcc-5.3.0/gcc/c/c-parser.c:8022
0x612c99 c_parser_expression_conv
../../gcc-5.3.0/gcc/c/c-parser.c:8055
0x60c096 c_parser_statement_after_labels
../../gcc-5.3.0/gcc/c/c-parser.c:5115
sh-4.3# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/volume1/local/bin/../libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-5.3.0/configure
--with-buildtime-tools=/volume1/mmt/x-tools/x86_64-unknown-linux-gnu/bin
--with-gmp=/usr/local --with-mpfr=/usr/local --with-mpc=/usr/local
--with-isl=/usr/local --disable-multilib
--with-sysroot=/volume1/mmt/x-tools/x86_64-unknown-linux-gnu/x86_64-unknown-linux-gnu/sysroot
--enable-bootstrap --disable-lto
Thread model: posix
gcc version 5.3.0 (GCC)
sh-4.3# uname -s -r -v -m -p -i -o
Linux 3.10.77 #7321 SMP Thu Apr 21 14:35:22 CST 2016 x86_64 unknown unknown
GNU/Linux
>From gcc-bugs-return-523467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 03:51:03 2016
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From: "nunya223bidness at streetwisemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70837] New: internal compiler error on libiberty/floatformat.c when bootstrapping 5.3.0 with 5.3.0
Date: Thu, 28 Apr 2016 03:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70837
Bug ID: 70837
Summary: internal compiler error on libiberty/floatformat.c
when bootstrapping 5.3.0 with 5.3.0
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: nunya223bidness at streetwisemail dot com
Target Milestone: ---
../gcc-5.3.0/configure --prefix=/usr/local
--with-native-system-header-files=/opt/include:/volume1/mmt/x-tools/x86_64-unknown-linux-gnu/include
--enable-bootstrap --enable-lto --with-{gmp,mpc,mpfr,isl}=/usr/local
--with-gnu-ld --enable-twoprocess --enable-gather-detailed-mem-stats
--enable-multilib --enable-multiarch --enable-decimal-float=yes
--enable-fixed-point --enable-plugin --disable-dependency-tracking
--disable-nls --disable-canonical-system-headers --with-glibc-version=2.20
--without-cuda-driver --enable-languages=c,c++
--with-build-time-tools=/usr/local --with-build-libsubdir=lib CFLAGS="-v
-save-temps" ; make
[ -f stage_final ] || echo stage3 > stage_final
make[1]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
make[2]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
make[3]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
rm -f stage_current
make[3]: Leaving directory '/volume1/local/src/gcc-5.3.0-build'
make[2]: Leaving directory '/volume1/local/src/gcc-5.3.0-build'
make[2]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
make[3]: Entering directory '/volume1/local/src/gcc-5.3.0-build/libiberty'
if [ x"-fpic" != x ]; then \
gcc -c -DHAVE_CONFIG_H -g -I. -I../../gcc-5.3.0/libiberty/../include -W
-Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic -fpic
../../gcc-5.3.0/libiberty/floatformat.c -o pic/floatformat.o; \
else true; fi
GNU MP: Cannot allocate memory (size=4611686018427387859)
../../gcc-5.3.0/libiberty/floatformat.c: In function 'floatformat_to_double':
../../gcc-5.3.0/libiberty/floatformat.c:529:2: internal compiler error: Aborted
dto = ldexp (1.0, exponent);
^
0x9bed4f crash_signal
../../gcc-5.3.0/gcc/toplev.c:383
0x93c390 real_from_mpfr(real_value*, __mpfr_struct const*, tree_node*,
mpfr_rnd_t)
../../gcc-5.3.0/gcc/realmpfr.c:92
0x939b49 real_from_string(real_value*, char const*)
../../gcc-5.3.0/gcc/real.c:2073
0x93a3bc real_from_string3(real_value*, char const*, machine_mode)
../../gcc-5.3.0/gcc/real.c:2123
0x6576a3 interpret_float
../../gcc-5.3.0/gcc/c-family/c-lex.c:897
0x65834c c_lex_with_flags(tree_node**, unsigned int*, unsigned char*, int)
../../gcc-5.3.0/gcc/c-family/c-lex.c:442
0x602fef c_lex_one_token
../../gcc-5.3.0/gcc/c/c-parser.c:258
0x613d1a c_parser_peek_token
../../gcc-5.3.0/gcc/c/c-parser.c:440
0x613d1a c_parser_next_token_is
../../gcc-5.3.0/gcc/c/c-parser.c:452
0x613d1a c_parser_postfix_expression_after_primary
../../gcc-5.3.0/gcc/c/c-parser.c:7865
0x60e067 c_parser_postfix_expression
../../gcc-5.3.0/gcc/c/c-parser.c:7715
0x61031a c_parser_unary_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6602
0x610e8f c_parser_cast_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6440
0x611072 c_parser_binary_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6255
0x611ba5 c_parser_conditional_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6031
0x611ff0 c_parser_expr_no_commas
../../gcc-5.3.0/gcc/c/c-parser.c:5949
0x61206a c_parser_expr_no_commas
../../gcc-5.3.0/gcc/c/c-parser.c:5991
0x6124e2 c_parser_expression
../../gcc-5.3.0/gcc/c/c-parser.c:8022
0x612c99 c_parser_expression_conv
../../gcc-5.3.0/gcc/c/c-parser.c:8055
0x60c096 c_parser_statement_after_labels
../../gcc-5.3.0/gcc/c/c-parser.c:5115
sh-4.3# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/volume1/local/bin/../libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-5.3.0/configure
--with-buildtime-tools=/volume1/mmt/x-tools/x86_64-unknown-linux-gnu/bin
--with-gmp=/usr/local --with-mpfr=/usr/local --with-mpc=/usr/local
--with-isl=/usr/local --disable-multilib
--with-sysroot=/volume1/mmt/x-tools/x86_64-unknown-linux-gnu/x86_64-unknown-linux-gnu/sysroot
--enable-bootstrap --disable-lto
Thread model: posix
gcc version 5.3.0 (GCC)
sh-4.3# uname -s -r -v -m -p -i -o
Linux 3.10.77 #7321 SMP Thu Apr 21 14:35:22 CST 2016 x86_64 unknown unknown
GNU/Linux
>From gcc-bugs-return-523468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 03:53:45 2016
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From: "nunya223bidness at streetwisemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70838] New: internal compiler error on libiberty/floatformat.c when bootstrapping 5.3.0 with 5.3.0
Date: Thu, 28 Apr 2016 03:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70838
Bug ID: 70838
Summary: internal compiler error on libiberty/floatformat.c
when bootstrapping 5.3.0 with 5.3.0
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: nunya223bidness at streetwisemail dot com
Target Milestone: ---
../gcc-5.3.0/configure --prefix=/usr/local
--with-native-system-header-files=/opt/include:/volume1/mmt/x-tools/x86_64-unknown-linux-gnu/include
--enable-bootstrap --enable-lto --with-{gmp,mpc,mpfr,isl}=/usr/local
--with-gnu-ld --enable-twoprocess --enable-gather-detailed-mem-stats
--enable-multilib --enable-multiarch --enable-decimal-float=yes
--enable-fixed-point --enable-plugin --disable-dependency-tracking
--disable-nls --disable-canonical-system-headers --with-glibc-version=2.20
--without-cuda-driver --enable-languages=c,c++
--with-build-time-tools=/usr/local --with-build-libsubdir=lib CFLAGS="-v
-save-temps" ; make
[ -f stage_final ] || echo stage3 > stage_final
make[1]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
make[2]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
make[3]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
rm -f stage_current
make[3]: Leaving directory '/volume1/local/src/gcc-5.3.0-build'
make[2]: Leaving directory '/volume1/local/src/gcc-5.3.0-build'
make[2]: Entering directory '/volume1/local/src/gcc-5.3.0-build'
make[3]: Entering directory '/volume1/local/src/gcc-5.3.0-build/libiberty'
if [ x"-fpic" != x ]; then \
gcc -c -DHAVE_CONFIG_H -g -I. -I../../gcc-5.3.0/libiberty/../include -W
-Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic -fpic
../../gcc-5.3.0/libiberty/floatformat.c -o pic/floatformat.o; \
else true; fi
GNU MP: Cannot allocate memory (size=4611686018427387859)
../../gcc-5.3.0/libiberty/floatformat.c: In function 'floatformat_to_double':
../../gcc-5.3.0/libiberty/floatformat.c:529:2: internal compiler error: Aborted
dto = ldexp (1.0, exponent);
^
0x9bed4f crash_signal
../../gcc-5.3.0/gcc/toplev.c:383
0x93c390 real_from_mpfr(real_value*, __mpfr_struct const*, tree_node*,
mpfr_rnd_t)
../../gcc-5.3.0/gcc/realmpfr.c:92
0x939b49 real_from_string(real_value*, char const*)
../../gcc-5.3.0/gcc/real.c:2073
0x93a3bc real_from_string3(real_value*, char const*, machine_mode)
../../gcc-5.3.0/gcc/real.c:2123
0x6576a3 interpret_float
../../gcc-5.3.0/gcc/c-family/c-lex.c:897
0x65834c c_lex_with_flags(tree_node**, unsigned int*, unsigned char*, int)
../../gcc-5.3.0/gcc/c-family/c-lex.c:442
0x602fef c_lex_one_token
../../gcc-5.3.0/gcc/c/c-parser.c:258
0x613d1a c_parser_peek_token
../../gcc-5.3.0/gcc/c/c-parser.c:440
0x613d1a c_parser_next_token_is
../../gcc-5.3.0/gcc/c/c-parser.c:452
0x613d1a c_parser_postfix_expression_after_primary
../../gcc-5.3.0/gcc/c/c-parser.c:7865
0x60e067 c_parser_postfix_expression
../../gcc-5.3.0/gcc/c/c-parser.c:7715
0x61031a c_parser_unary_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6602
0x610e8f c_parser_cast_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6440
0x611072 c_parser_binary_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6255
0x611ba5 c_parser_conditional_expression
../../gcc-5.3.0/gcc/c/c-parser.c:6031
0x611ff0 c_parser_expr_no_commas
../../gcc-5.3.0/gcc/c/c-parser.c:5949
0x61206a c_parser_expr_no_commas
../../gcc-5.3.0/gcc/c/c-parser.c:5991
0x6124e2 c_parser_expression
../../gcc-5.3.0/gcc/c/c-parser.c:8022
0x612c99 c_parser_expression_conv
../../gcc-5.3.0/gcc/c/c-parser.c:8055
0x60c096 c_parser_statement_after_labels
../../gcc-5.3.0/gcc/c/c-parser.c:5115
sh-4.3# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/volume1/local/bin/../libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-5.3.0/configure
--with-buildtime-tools=/volume1/mmt/x-tools/x86_64-unknown-linux-gnu/bin
--with-gmp=/usr/local --with-mpfr=/usr/local --with-mpc=/usr/local
--with-isl=/usr/local --disable-multilib
--with-sysroot=/volume1/mmt/x-tools/x86_64-unknown-linux-gnu/x86_64-unknown-linux-gnu/sysroot
--enable-bootstrap --disable-lto
Thread model: posix
gcc version 5.3.0 (GCC)
sh-4.3# uname -s -r -v -m -p -i -o
Linux 3.10.77 #7321 SMP Thu Apr 21 14:35:22 CST 2016 x86_64 unknown unknown
GNU/Linux
>From gcc-bugs-return-523469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 03:55:21 2016
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From: "nunya223bidness at streetwisemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70838] internal compiler error on libiberty/floatformat.c when bootstrapping 5.3.0 with 5.3.0
Date: Thu, 28 Apr 2016 03:55:00 -0000
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--- Comment #1 from nunya223bidness at streetwisemail dot com ---
Created attachment 38354
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38354&action=edit
tar.xz of build-x86_64-unknown-linux-gnu/libiberty/*.i
>From gcc-bugs-return-523470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 06:40:11 2016
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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/49630] [OOP] ICE on obsolescent deferred-length type bound character function
Date: Thu, 28 Apr 2016 06:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49630
--- Comment #11 from Vittorio Zecca <zeccav at gmail dot com> ---
I am still having an ICE with gfortran 5.3.0 on the following
module abc
implicit none
type,abstract::abc_abstract
contains
procedure(abc_interface),deferred::abc_function
end type abc_abstract
type,extends(abc_abstract)::abc_type
contains
procedure::abc_function
end type abc_type
abstract interface
function abc_interface(this)
import abc_abstract
class(abc_abstract),intent(in)::this
character(len=*)::abc_interface
end function abc_interface
end interface
contains
function abc_function(this)
class(abc_type),intent(in)::this
character(len=5)::abc_function
abc_function="hello"
end function abc_function
subroutine do_something(this)
class(abc_abstract),intent(in)::this
print *,this%abc_function()
end subroutine do_something
end module abc
gfbug111.f:30:0:
print *,this%abc_function()
1
internal compiler error: in wide_int_to_tree, at tree.c:1465
0xc3eae3 wide_int_to_tree(tree_node*,
generic_wide_int<wide_int_ref_storage<false> > const&)
/home/vitti/gcc-5.3.0/gcc/tree.c:1465
0xc3ebb9 build_int_cst(tree_node*, long)
/home/vitti/gcc-5.3.0/gcc/tree.c:1273
0x83a9aa round_up_loc(unsigned int, tree_node*, unsigned int)
/home/vitti/gcc-5.3.0/gcc/fold-const.c:16043
0xa555bb finalize_type_size
/home/vitti/gcc-5.3.0/gcc/stor-layout.c:1802
0xa56766 layout_type(tree_node*)
/home/vitti/gcc-5.3.0/gcc/stor-layout.c:2442
0xc3cb73 build_array_type_1
/home/vitti/gcc-5.3.0/gcc/tree.c:7968
0x709a64 gfc_get_character_type_len_for_eltype(tree_node*, tree_node*)
/home/vitti/gcc-5.3.0/gcc/fortran/trans-types.c:1048
0x6d16d7 gfc_conv_procedure_call(gfc_se*, gfc_symbol*,
gfc_actual_arglist*, gfc_expr*, vec<tree_node*, va_gc, vl_embed>*)
/home/vitti/gcc-5.3.0/gcc/fortran/trans-expr.c:5644
0x6d1d6f gfc_conv_function_expr
/home/vitti/gcc-5.3.0/gcc/fortran/trans-expr.c:6293
0x6d789a gfc_conv_expr_reference(gfc_se*, gfc_expr*)
/home/vitti/gcc-5.3.0/gcc/fortran/trans-expr.c:7349
0x6f277f gfc_trans_transfer(gfc_code*)
/home/vitti/gcc-5.3.0/gcc/fortran/trans-io.c:2394
0x6a4e47 trans_code
/home/vitti/gcc-5.3.0/gcc/fortran/trans.c:1868
0x6f03a7 build_dt
/home/vitti/gcc-5.3.0/gcc/fortran/trans-io.c:1921
0x6a4e67 trans_code
/home/vitti/gcc-5.3.0/gcc/fortran/trans.c:1840
0x6c4ce3 gfc_generate_function_code(gfc_namespace*)
/home/vitti/gcc-5.3.0/gcc/fortran/trans-decl.c:5851
0x6a8421 gfc_generate_module_code(gfc_namespace*)
/home/vitti/gcc-5.3.0/gcc/fortran/trans.c:2036
0x662d4d translate_all_program_units
/home/vitti/gcc-5.3.0/gcc/fortran/parse.c:5330
0x662d4d gfc_parse_file()
/home/vitti/gcc-5.3.0/gcc/fortran/parse.c:5540
0x6a22b5 gfc_be_parse_file
/home/vitti/gcc-5.3.0/gcc/fortran/f95-lang.c:229
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.
Maybe it is related to this issue?
>From gcc-bugs-return-523471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 06:44:01 2016
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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/50402] ICE in gfc_conv_expr_descriptor
Date: Thu, 28 Apr 2016 06:44:00 -0000
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--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
ICE on gfortran 5.3.0
gfortran should never have an ICE, even on invalid code.
>From gcc-bugs-return-523472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 06:46:35 2016
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug java/70839] New: [6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
Date: Thu, 28 Apr 2016 06:46:00 -0000
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Bug ID: 70839
Summary: [6/7 regression] Every libjava execution test FAILs:
Incorrect library ABI version detected
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: java
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Created attachment 38355
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38355&action=edit
proposed patch
Since the 6.1.0 release, every single libjava execution test FAILs everywhere
(seen on Solaris/x86, Linux/x86_64, and Darwin/x86):
libgcj failure: gcj linkage error.
Incorrect library ABI version detected. Aborting.
The message is from libjava/java/lang/natClassLoader.cc (_Jv_CheckABIVersion)
which (on i386-pc-solaris2.12) is called like this:
#0 _Jv_CheckABIVersion (value=1074342824)
at /vol/src/gnu/gcc/gcc-6.1.0/libjava/java/lang/natClassLoader.cc:271
#1 0xffff80ffbde0b47d in _Jv_RegisterClasses (
classes=0xffff80ffbeced688 <_Jv_JCR_SECTION_data>)
at /vol/src/gnu/gcc/gcc-6.1.0/libjava/java/lang/natClassLoader.cc:293
#2 0xffff80ffbddc553a in frame_dummy ()
from
/var/gcc/gcc-6.1.0/12-gcc-gas/i386-pc-solaris2.12/amd64/libjava/.libs/libgcj.so.17
#3 0xffff80ffbf630288 in call_array () from /lib/amd64/ld.so.1
#4 0xffff80ffbf630414 in call_init () from /lib/amd64/ld.so.1
#5 0xffff80ffbf62f3b0 in setup () from /lib/amd64/ld.so.1
#6 0xffff80ffbf6425f7 in _setup () from /lib/amd64/ld.so.1
#7 0xffff80ffbf62131e in _rt_boot () from /lib/amd64/ld.so.1
The version == GCJ_CXX_ABI_VERSION test fails: the latter is (from
libjava/include/jvm.h)
#define GCJ_CXX_ABI_VERSION (__GNUC__ * 100000)
Before the release, version was 600000, since then it's 601000.
In libjava/java/lang/natClassLoader.c (_Jv_RegisterClasses) we have
_Jv_CheckABIVersion ((unsigned long) klass->next_or_version);
where klass->next_or_version is set in gcc/java/class.c (make_class_data):
PUSH_FIELD_VALUE (v2, "next_or_version", gcj_abi_version);
Ultimately, gcc/java/decl.c (parse_version) sets gcj_abi_version from
version_string and still extracts the minor version, while this libjava
change
2016-01-03 Matthias Klose <doko@ubuntu.com>
* libtool-version: Bump soversion.
* include/jvm.h (GCJ_CXX_ABI_VERSION): Don't encode __GNUC_MINOR__.
doesn't expect the minor version any longer.
The attached patch gets rid of the minor version in jc1, too and seems to fix
the errors (x86_64-apple-darwin15.5.0 libjava make check still running).
Rainer
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Subject: [Bug java/70839] [6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
Date: Thu, 28 Apr 2016 06:46:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.2
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Subject: [Bug fortran/50410] [4.9/5/6/7 Regression] ICE in record_reference
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--- Comment #21 from Vittorio Zecca <zeccav at gmail dot com> ---
ICE still in 5.3.0
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Subject: [Bug fortran/50392] SIGSEGV in gfc_trans_label_assign
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--- Comment #8 from Vittorio Zecca <zeccav at gmail dot com> ---
ICE still in 5.3.0
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Subject: [Bug fortran/50536] an input item shall not appear as the do-variable of any io-implied-do
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--- Comment #8 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in 5.3.0
>From gcc-bugs-return-523477-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 07:01:20 2016
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Subject: [Bug ada/67494] xsinfo sanitizer detects overlapping strings in assignment statement
Date: Thu, 28 Apr 2016 07:01:00 -0000
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--- Comment #2 from Vittorio Zecca <zeccav at gmail dot com> ---
Any update on this issue?
>From gcc-bugs-return-523478-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 07:06:46 2016
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Subject: [Bug c/70830] ARM interrupt attribute: push/pop do not support {reglist}^
Date: Thu, 28 Apr 2016 07:06:00 -0000
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Thorsten Czujack <service@ant-solutions.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |service@ant-solutions.net
--- Comment #1 from Thorsten Czujack <service@ant-solutions.net> ---
I can confirm this bug.
void __attribute__ ((interrupt ("IRQ"))) dm3730_IRQHandler(void)
{
prints("\n#!--------------------------------------------------\n#! !!
ERROR: ");
prints("IRQ" );
prints(" !!\n#!--------------------------------------------------\n");
}
> {standard input}: Assembler messages:
> {standard input}:1528: Error: push/pop do not support {reglist}^ -- `pop {r0,r1,r2,r3,r4,r5,ip,pc}^'
> {standard input}:1561: Error: push/pop do not support {reglist}^ -- `pop {r0,r1,r2,r3,r4,r5,r6,pc}^'
>From gcc-bugs-return-523479-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 07:08:58 2016
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Subject: [Bug fortran/44265] Link error with reference to parameter array in specification expression
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--- Comment #7 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in 5.3.0
>From gcc-bugs-return-523480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 07:09:58 2016
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Subject: [Bug ada/67494] xsinfo sanitizer detects overlapping strings in assignment statement
Date: Thu, 28 Apr 2016 07:09:00 -0000
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
No, it's low priority, the SPITBOL-like units are rarely used in practice.
>From gcc-bugs-return-523481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 07:13:39 2016
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Subject: [Bug fortran/50069] FORALL fails on a character array
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--- Comment #7 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in 5.3.0
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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/70821] x86_64: __atomic_fetch_add/sub() uses XADD rather than DECL in some cases
Date: Thu, 28 Apr 2016 07:43:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I don't see any xadd* insns if compiled with -O2, it doesn't indeed use lock;
decl, but lock; subl $1 or similar; but that is just the matter of generic
tuning which prefers not to use inc/dec; if you use e.g. -O2 -mtune=barcelona,
then you get even the lock; decl you are looking for.
So, are you testing with -Os instead?
>From gcc-bugs-return-523483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 07:55:14 2016
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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/70840] New: revisit reassoc handling of pow / powi, amend match.pd for powi
Date: Thu, 28 Apr 2016 07:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70840
Bug ID: 70840
Summary: revisit reassoc handling of pow / powi, amend match.pd
for powi
Product: gcc
Version: 6.0
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Currently reassoc builds powi from repeated multiplications guarded with
-funsafe-math-optimizations where later expansion of powi is safe for
fp-contract != off.
The acceptable_pow_call cases are globally guarded with
flag_unsafe_math_optimizations as well but POWI is always safe
and only POW has to be guarded with flag_unsafe_math_optimizations.
match.pd has quite some patterns involving POW but none involving POWI.
At least for flag_unsafe_math_optimizations POWI can be treated as POW
and whether we emit POW or POWI does not matter for
flag_unsafe_math_optimziations.
>From gcc-bugs-return-523484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 07:56:10 2016
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Subject: [Bug tree-optimization/70777] x*x pessimised to pow(x,2) with -Og -ffast-math
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk, this isn't a regression.
>From gcc-bugs-return-523485-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 07:56:23 2016
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Subject: [Bug tree-optimization/70777] x*x pessimised to pow(x,2) with -Og -ffast-math
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 28 07:55:33 2016
New Revision: 235545
URL: https://gcc.gnu.org/viewcvs?rev=235545&root=gcc&view=rev
Log:
2016-04-28 Richard Biener <rguenther@suse.de>
PR middle-end/70777
* fold-const.c (fold_binary_loc): Remove x*x to pow(x,2.0)
canonicalization.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
>From gcc-bugs-return-523487-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:03:58 2016
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Subject: [Bug target/70821] x86_64: __atomic_fetch_add/sub() uses XADD rather than DECL in some cases
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38356
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38356&action=edit
gcc7-pr70821.patch
For -Os, the problem is that peephole2 pass first replaces the movl $-1, %eax
instruction with orl $-1, %eax as the latter is 2 bytes shorter, and then the
peephole2 for the atomic decrement + comparison doesn't trigger anymore.
>From gcc-bugs-return-523486-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:03:09 2016
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From: "blaffablaffa at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70832] move-assignment of lambdas calls copy-assignment for captures
Date: Thu, 28 Apr 2016 08:03:00 -0000
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--- Comment #2 from Lorenzo Pistone <blaffablaffa at gmail dot com> ---
I should add also that this makes impossible to assign lambdas with move-only
captures to a std::function.
>From gcc-bugs-return-523488-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:23:03 2016
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Subject: [Bug tree-optimization/70841] New: reassoc fails to handle FP division
Date: Thu, 28 Apr 2016 08:23:00 -0000
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Bug ID: 70841
Summary: reassoc fails to handle FP division
Product: gcc
Version: 6.0
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reassoc fails to handle
float foo (float x, float y)
{
return x * y / x;
}
with -freciprocal-math (at least) it could handle this as
x * y * (1/x)
and simplify ops accordingly (with -funsafe-math-opts or maybe already
with -ffp-contract=fast). Implementation-wise this could be
handled similar to how we handle minus for plus reassoc. OTOH
it would be better to rewrite that with a flag on the op "negate"
and division could be handled with a flag "invert".
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Subject: [Bug c++/70832] move-assignment of lambdas calls copy-assignment for captures
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
namespace std {
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 <class T>
constexpr typename remove_reference<T>::type&&
move(T&& t) noexcept
{ return static_cast<typename remove_reference<T>::type&&>(t); }
}
int main() {
struct move_only {
move_only() = default;
move_only(const move_only&) = delete;
move_only(move_only&&) = default;
move_only& operator=(const move_only&) = delete;
move_only& operator=(move_only&&) = default;
};
auto lambda = [test = move_only{}]{};
auto lambda_moved = std::move(lambda);
lambda = std::move(lambda_moved);
}
move.cc: In function ‘int main()’:
move.cc:22:36: error: use of deleted function ‘main()::<lambda()>&
main()::<lambda()>::operator=(const main()::<lambda()>&)’
lambda = std::move(lambda_moved);
^
move.cc:20:38: note: a lambda closure type has a deleted copy assignment
operator
auto lambda = [test = move_only{}]{};
^
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Subject: [Bug java/70839] [6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
Date: Thu, 28 Apr 2016 08:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70839
Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Priority|P3 |P1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
But the actual 6.1.0 release works, right?
>From gcc-bugs-return-523491-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:28:15 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70837] internal compiler error on libiberty/floatformat.c when bootstrapping 5.3.0 with 5.3.0
Date: Thu, 28 Apr 2016 08:28:00 -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> ---
dup
*** This bug has been marked as a duplicate of bug 70838 ***
>From gcc-bugs-return-523493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:28:35 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70838] internal compiler error on libiberty/floatformat.c when bootstrapping 5.3.0 with 5.3.0
Date: Thu, 28 Apr 2016 08:28:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 70836 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:28:17 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70838] internal compiler error on libiberty/floatformat.c when bootstrapping 5.3.0 with 5.3.0
Date: Thu, 28 Apr 2016 08:28:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 70837 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:28:35 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70836] internal compiler error on libiberty/floatformat.c when bootstrapping 5.3.0 with 5.3.0
Date: Thu, 28 Apr 2016 08:28:00 -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> ---
dup
*** This bug has been marked as a duplicate of bug 70838 ***
>From gcc-bugs-return-523495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:30:41 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70838] internal compiler error on libiberty/floatformat.c when bootstrapping 5.3.0 with 5.3.0
Date: Thu, 28 Apr 2016 08:30:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-linux
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2016-04-28
Ever confirmed|0 |1
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
This seems to crash in your mpfr library, you should debug what goes wrong
there.
>From gcc-bugs-return-523496-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:32:45 2016
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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/70831] [6/7 Regression] FTBFS: Build fails with bootstrap-lto and profiledbootstrap
Date: Thu, 28 Apr 2016 08:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build, lto
Target| |x86_64-*-*
Component|lto |middle-end
Target Milestone|--- |6.2
Summary|FTBFS: Build fails with |[6/7 Regression] FTBFS:
|bootstrap-lto and |Build fails with
|profiledbootstrap |bootstrap-lto and
| |profiledbootstrap
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
You'll eventually run into PR60277 as well. Probably requires
--enable-checking=release to trigger.
>From gcc-bugs-return-523497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:36:12 2016
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug java/70839] [6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
Date: Thu, 28 Apr 2016 08:36:00 -0000
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--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
> But the actual 6.1.0 release works, right?
No, unfortunately not: that's where I first noticed the problem when
building 6.1.0 from the tarball. It's literally the 6.0.1 -> 6.1.0 last
minute change that broke things ;-(
Rainer
>From gcc-bugs-return-523498-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:39:37 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/70829] LTO bootstrap failure
Date: Thu, 28 Apr 2016 08:39:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that this compares LTO bytecode, see also PR62077.
>From gcc-bugs-return-523499-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:40:03 2016
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Subject: [Bug c++/70827] [6/7 regression] dubious use of deleted function in inherited constructor
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Target Milestone|--- |6.2
Summary|[6 regression] dubious use |[6/7 regression] dubious
|of deleted function in |use of deleted function in
|inherited constructor |inherited constructor
>From gcc-bugs-return-523500-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:41:22 2016
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Subject: [Bug rtl-optimization/70826] [7 regression] many test cases fail starting with r235442
Date: Thu, 28 Apr 2016 08:41:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-523501-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:41:23 2016
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From: "nathanael.huebbe at informatik dot uni-hamburg.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70842] New: internal compiler error with character members within a polymorphic pointer
Date: Thu, 28 Apr 2016 08:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70842
Bug ID: 70842
Summary: internal compiler error with character members within
a polymorphic pointer
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: nathanael.huebbe at informatik dot uni-hamburg.de
Target Milestone: ---
There is a problem with character members of derived types when using
polymorphic pointers, which triggers an ICE. It seems as if gfortran looses
track of the length of `character` members when performing a downcast from a
limited polymorphic type. The bug can be reproduced with this little code
snippet:
$ cat mo_compiler_test.f90
module foo
TYPE, ABSTRACT :: t_Intermediate
END TYPE t_Intermediate
type, extends(t_Intermediate) :: t_Foo
character(:), allocatable :: string
end type t_Foo
contains
subroutine bar(me)
class(t_Intermediate), target :: me
select type(me)
type is(t_Foo)
print*, len(me%string)
end select
end subroutine bar
end module foo
$ gfortran -c -o mo_compiler_test.o mo_compiler_test.f90
f951: internal compiler error: in gfc_add_component_ref, at
fortran/class.c:245
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
I have been able to reproduce this bug with gfortran versions 4.9.3, 5.1.0,
5.3.0, up to the current master in the git-svn mirror (commit a80f3f45b016).
The bug is not present in versions up to 4.9.2. A git-bisect on the git-svn
mirror revealed commit 53ec6b3f003a to be the first bad commit.
It is interesting to note that this bug is not triggered when the `select
type()` argument is an unlimited polymorphic pointer, even if that unlimited
polymorphic pointer is just an alias for a limited polymorphic variable. See
the comments in the attached code for details on this.
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70830] [6/7 Regression] ARM interrupt attribute: push/pop do not support {reglist}^
Date: Thu, 28 Apr 2016 08:42:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |arm*
Status|UNCONFIRMED |NEW
Known to work| |4.9.4, 5.3.1
Last reconfirmed| |2016-04-28
Component|c |target
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ARM interrupt attribute: |[6/7 Regression] ARM
|push/pop do not support |interrupt attribute:
|{reglist}^ |push/pop do not support
| |{reglist}^
Target Milestone|--- |6.2
Known to fail| |6.1.0, 7.0
--- Comment #2 from ktkachov at gcc dot gnu.org ---
Confirmed.
This looks like fallout from the unified asm conversion
>From gcc-bugs-return-523503-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 08:43:13 2016
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From: "nathanael.huebbe at informatik dot uni-hamburg.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/70842] internal compiler error with character members within a polymorphic pointer
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--- Comment #1 from nathanael.huebbe at informatik dot uni-hamburg.de ---
Created attachment 38357
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38357&action=edit
Code to reproduced the bug
the forgotten attachment...
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/70843] New: ICE in add_expr, at tree.c:7913
Date: Thu, 28 Apr 2016 08:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70843
Bug ID: 70843
Summary: ICE in add_expr, at tree.c:7913
Product: gcc
Version: unknown
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Created attachment 38358
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testcase
Hi,
Since commit r235507 (PR sanitizer/70683), I see ICEs on arm*-linux* targets
when building glibc.
$ arm-none-linux-gnueabihf-gcc llseek.i -c -std=gnu99 -fgnu89-inline -O2 -Wall
-Winline -Wundef -Wwrite-strings -fmerge-all-constants -frounding-math -g
-Wstrict-prototypes -S
../sysdeps/unix/sysv/linux/llseek.c: In function '__llseek':
../sysdeps/unix/sysv/linux/llseek.c:35:25: internal compiler error: in
add_expr, at tree.c:7913
&retval, whence) ?: retval);
^
0xd6e104 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/tree.c:7913
0xd6d6a5 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/tree.c:7990
0xd6d6a5 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/tree.c:7990
0xd6dc29 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/tree.c:7990
0x7d0322 operand_equal_p(tree_node const*, tree_node const*, unsigned int)
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/fold-const.c:2760
0x7f5ed0 operand_equal_for_comparison_p
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/fold-const.c:3345
0x801385 fold_ternary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*, tree_node*)
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/fold-const.c:11581
0x802721 fold_build3_stat_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*, tree_node*)
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/fold-const.c:12582
0x5e155c c_fully_fold_internal
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/c/c-fold.c:506
0x5e45da c_fully_fold(tree_node*, bool, bool*)
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/c/c-fold.c:90
0x586264 c_finish_return(unsigned int, tree_node*, tree_node*)
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/c/c-typeck.c:9650
0x5cb2bc c_parser_statement_after_labels
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/c/c-parser.c:5216
0x5cc53b c_parser_compound_statement_nostart
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/c/c-parser.c:4858
0x5cce2e c_parser_compound_statement
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/c/c-parser.c:4693
0x5ce300 c_parser_declaration_or_fndef
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/c/c-parser.c:2105
0x5d79a6 c_parser_external_declaration
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/c/c-parser.c:1549
0x5d84b9 c_parser_translation_unit
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/c/c-parser.c:1430
0x5d84b9 c_parse_file()
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/c/c-parser.c:17915
0x63c8d2 c_common_parse_file()
/home/christophe.lyon/src/GCC/sources/gcc-fsf/trunk-for-crontab/gcc/c-family/c-opts.c:1064
GCC configured as:
--target=arm-none-linux-gnueabihf --with-float=hard --enable-build-with-cxx
--with-mode=arm --with-cpu=cortex-a9 --with-fpu=neon
>From gcc-bugs-return-523505-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 09:01:14 2016
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Subject: [Bug target/70821] x86_64: __atomic_fetch_add/sub() uses XADD rather than DECL in some cases
Date: Thu, 28 Apr 2016 09:01:00 -0000
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--- Comment #3 from dhowells at redhat dot com <dhowells at redhat dot com> ---
Yes, I'm testing with -Os.
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--- Comment #3 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in gfortran 5.3.0
/home/vitti/gcc-5.3.0/gcc/fortran/data.c:191:32: runtime error: null
pointer passed as argument 2, which is declared to never be null
data.c:191 "memcpy (&dest[start], rvalue->value.character.string,
len * sizeof (gfc_char_t));"
Maybe len==0
>From gcc-bugs-return-523507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 09:06:39 2016
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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'
Date: Thu, 28 Apr 2016 09:06:00 -0000
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--- Comment #3 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in gfortran 5.3.0
/home/vitti/gcc-5.3.0/gcc/fortran/interface.c:2707:33: runtime error:
load of value 1818451807, which is not a valid value for type 'expr_t'
interface.c:2707 "&& f->sym->ts.u.cl->length->expr_type == EXPR_CONSTANT"
You may reproduce this one with a version of gfortran compiled with
-fsanitize=undefined
>From gcc-bugs-return-523508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 09:07:28 2016
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From: "danny+gcc at nerdcruft dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70844] New: spurious -Wuseless-cast warning with inherited constructors
Date: Thu, 28 Apr 2016 09:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70844
Bug ID: 70844
Summary: spurious -Wuseless-cast warning with inherited
constructors
Product: gcc
Version: 6.1.0
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Priority: P3
Component: c++
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Created attachment 38359
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38359&action=edit
useless-cast inherited constructor test case
When using -Wuseless-cast with C++11 code under gcc-6.1.0 an inherited
constructor will trigger useless-cast warnings on synthesized constructors
(with at least arithmetic types) even if the parameters are of the correct
type.
Attached a reduced test case.
Behaviour can be triggered as follows, with example output:
danny@steve /tmp $ g++ -std=c++11 -Wuseless-cast -c -o test.o test.cpp
test.cpp: In constructor ‘derived::derived(int)’:
test.cpp:6:17: warning: useless cast to type ‘int’ [-Wuseless-cast]
using base::base;
^~~~
test.cpp: In function ‘void func(int)’:
test.cpp:11:17: note: synthesized method ‘derived::derived(int)’ first required
here
derived d (i);
^
This behaviour is observed in gcc-6.0.0 and gcc-6.1.0, but not gcc-5.3.0.
>From gcc-bugs-return-523509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 09:16:14 2016
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Subject: [Bug target/67484] options-save.c sanitizer asan detects freed storage referenced heap-use-after-free
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--- Comment #14 from Vittorio Zecca <zeccav at gmail dot com> ---
I still get it in g++ 5.3.0
You may reproduce this one with a version of g++ compiled with
-fsanitize=address
[vitti cc]$/home/vitti/1tb/vitti/local/gcc-5.3.0-address/bin/g++ gccerr26.C -S
=================================================================
==4766==ERROR: AddressSanitizer: heap-use-after-free on address
0x6020000057d0 at pc 0x2b8838780025 bp 0x7fffdc0e27c0 sp
0x7fffdc0e1f70
READ of size 1 at 0x6020000057d0 thread T0
#0 0x2b8838780024 in __interceptor_strcmp
/home/vitti/gcc-5.3.0/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:178
#1 0x10bc6aa in cl_target_option_eq(cl_target_option const*,
cl_target_option const*)
/home/vitti/1tb/vitti/gcc-5.3.0-address/gcc/options-save.c:3555
options-save.c:3555 "|| strcmp (ptr1->x_ix86_arch_string,
ptr2->x_ix86_arch_string)))"
>From gcc-bugs-return-523510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 09:19:11 2016
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Subject: [Bug target/70821] x86_64: __atomic_fetch_add/sub() uses XADD rather than DECL in some cases
Date: Thu, 28 Apr 2016 09:19:00 -0000
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--- Comment #4 from dhowells at redhat dot com <dhowells at redhat dot com> ---
The patch works, thanks:
000000000000001c <test_atomic_dec_and_test>:
1c: f0 ff 0f lock decl (%rdi)
1f: ba 00 00 00 00 mov $0x0,%edx
24: b8 00 00 00 00 mov $0x0,%eax
29: 48 0f 44 c2 cmove %rdx,%rax
2d: c3 retq
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Subject: [Bug middle-end/70843] [7 Regression] ICE in add_expr, at tree.c:7913
Date: Thu, 28 Apr 2016 09:20:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-checking
Component|other |middle-end
Version|unknown |7.0
Target Milestone|--- |7.0
Summary|ICE in add_expr, at |[7 Regression] ICE in
|tree.c:7913 |add_expr, at tree.c:7913
>From gcc-bugs-return-523512-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 09:26:35 2016
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Subject: [Bug target/59549] [SH] __builtin_return_address causes push/pop of PR
Date: Thu, 28 Apr 2016 09:26:00 -0000
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--- Comment #2 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Ran over the following in sh.c, maybe it's related:
/* For Shcompact, if not optimizing, we end up with a memory reference
using the return address pointer for __builtin_return_address even
though there is no actual need to put the PR register on the stack.
*/
pr_live |= df_regs_ever_live_p (RETURN_ADDRESS_POINTER_REGNUM);
}
/* Force PR to be live if the prologue has to call the SHmedia
argument decoder or register saver. */
has_call = pr_live;
>From gcc-bugs-return-523514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 09:38:36 2016
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Subject: [Bug rtl-optimization/70825] x86_64: __atomic_compare_exchange_n() accesses stack unnecessarily
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-28
Ever confirmed|0 |1
--- Comment #2 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Confirmed then.
>From gcc-bugs-return-523513-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 09:38:17 2016
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Subject: [Bug rtl-optimization/70825] x86_64: __atomic_compare_exchange_n() accesses stack unnecessarily
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64, aarch64
CC| |ramana at gcc dot gnu.org
Component|target |rtl-optimization
--- Comment #1 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
There is an unnecessary store to the stack regardless of the architecture. I
suspect that's just because of the a combination of the specification of the
intrinsic and DSE being unable to remove such stores.
For e.g. on aarch64 with:
#include <stdbool.h>
#define __always_inline inline __attribute__((always_inline))
typedef struct {
int counter;
} atomic_t;
static __always_inline int atomic_cmpxchg(atomic_t *v, int old, int new)
{
int cur = old;
if (__atomic_compare_exchange_n(&v->counter, &cur, new, false,
__ATOMIC_SEQ_CST,
__ATOMIC_RELAXED))
return cur;
return cur;
}
void test_atomic_cmpxchg(atomic_t *counter)
{
atomic_cmpxchg(counter, 23, 42);
}
we get.
sub sp, sp, #16
mov w1, 23
mov w2, 42
str w1, [sp, 12] ---> unneeded
.L3:
ldaxr w3, [x0]
cmp w3, w1
bne .L4
stlxr w4, w2, [x0]
cbnz w4, .L3
.L4:
add sp, sp, 16
ret
>From gcc-bugs-return-523515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 09:39:08 2016
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Subject: [Bug ada/70786] Missing "not" breaks Ada.Text_IO.Get_Immediate(File, Item, Available)
Date: Thu, 28 Apr 2016 09:39:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |ebotcazou at gcc dot gnu.org
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixing.
>From gcc-bugs-return-523516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 09:59:32 2016
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Subject: [Bug c++/70540] [4.9/5/6 Regression] ICE on invalid code in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
Date: Thu, 28 Apr 2016 09:59:00 -0000
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--- Comment #8 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Thu Apr 28 09:58:45 2016
New Revision: 235552
URL: https://gcc.gnu.org/viewcvs?rev=235552&root=gcc&view=rev
Log:
/cp
2016-04-28 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/70540
* semantics.c (process_outer_var_ref): Unconditionally return
error_mark_node when mark_used returns false.
/testsuite
2016-04-28 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/70540
* g++.dg/cpp0x/auto48.C: New.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp0x/auto48.C
Modified:
branches/gcc-6-branch/gcc/cp/ChangeLog
branches/gcc-6-branch/gcc/cp/semantics.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-523517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 10:01:36 2016
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Subject: [Bug c++/70540] [4.9/5 Regression] ICE on invalid code in cxx_incomplete_type_diagnostic, at cp/typeck2.c:569
Date: Thu, 28 Apr 2016 10:01:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|4.9.4 |6.2
Summary|[4.9/5/6 Regression] ICE on |[4.9/5 Regression] ICE on
|invalid code in |invalid code in
|cxx_incomplete_type_diagnos |cxx_incomplete_type_diagnos
|tic, at cp/typeck2.c:569 |tic, at cp/typeck2.c:569
--- Comment #9 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed for 6.2 too. Personally, I'm not going to fiddle with older branches for
this mild regression.
>From gcc-bugs-return-523518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 10:02:55 2016
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Subject: [Bug fortran/70842] [4.9/5/6/7 Regression] internal compiler error with character members within a polymorphic pointer
Date: Thu, 28 Apr 2016 10:02:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-28
CC| |vehre at gcc dot gnu.org
Blocks| |68241
Summary|internal compiler error |[4.9/5/6/7 Regression]
|with character members |internal compiler error
|within a polymorphic |with character members
|pointer |within a polymorphic
| |pointer
Ever confirmed|0 |1
Known to fail| |6.1.0, 7.0
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The change occurred between revisions r219823 (2015-01-18, compiles) and
r219830 (2015-01-19, ICE), likely r219827 (pr60255) for gcc-5 and r221591 for
gcc-4.9.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68241
[Bug 68241] [meta-bug] Deferred-length character
>From gcc-bugs-return-523519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 10:16:50 2016
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
Date: Thu, 28 Apr 2016 10:16:00 -0000
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--- Comment #7 from dhowells at redhat dot com <dhowells at redhat dot com> ---
We should also be able to reduce:
bool
test_bit (int *a, int bit)
{
uint mask = (1u << bit);
return (__atomic_load_n (a, __ATOMIC_xxx) & mask) != 0;
}
to a BT instruction on x86.
>From gcc-bugs-return-523520-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 10:22:04 2016
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Subject: [Bug bootstrap/70829] LTO bootstrap failure
Date: Thu, 28 Apr 2016 10:22:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Works for me btw.
>From gcc-bugs-return-523521-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 10:39:35 2016
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
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--- Comment #8 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to dhowells@redhat.com from comment #6)
> I'm looking to implement Linux kernel atomics with C++-11 intrinsics, so
> being able to reduce a CMPXCHG-loop to BTR/BTS/BTC would be really handy.
BTW: A low-hanging fruit in this area would be using new asm flags feature, as
explained in [1]. There is also LKML discussion about the possible patch [2].
[1]
http://developers.redhat.com/blog/2016/02/25/new-asm-flags-feature-for-x86-in-gcc-6/
[2] https://lkml.org/lkml/2015/7/27/735
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
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--- Comment #17 from amker at gcc dot gnu.org ---
The if-converted loop of the reported test is as:
<bb 4>:
# i_27 = PHI <0(3), i_21(5)>
# n1_29 = PHI <0(3), n1_20(5)>
# n2_28 = PHI <0(3), n2_34(5)>
i.1_7 = (sizetype) i_27;
_9 = u_8(D) + i.1_7;
_11 = *_9;
_13 = v_12(D) + i.1_7;
_14 = *_13;
_17 = v_12(D) + i.1_7;
_18 = *_17;
_31 = _18 != 0;
_36 = (int) _31;
_48 = (long int) _36;
_45 = _11 != 0;
_44 = _14 == 0;
_43 = _44 & _45;
_ifc__40 = _43 ? 1 : 0;
n2_34 = n2_28 + _ifc__40;
prephitmp_49 = _11 != 0 ? 0 : _48;
n1_20 = n1_29 + prephitmp_49;
i_21 = i_27 + 1;
if (n_6(D) > i_21)
goto <bb 5>;
else
goto <bb 6>;
<bb 5>:
goto <bb 4>;
For stmt: _ifc__40 = _43 ? 1 : 0; Its pattern_stmt is: patt_37 = patt_38 ? 1 :
0;
Function vectorizable_condition calls expand_vec_cond_expr_p(vectype,
comp_vectype) which we have:
(gdb) call debug_tree(vectype)
<vector_type 0x7ffff6a5fd20
type <integer_type 0x7ffff695f930 long int sizes-gimplified public DI
size <integer_cst 0x7ffff695bca8 constant 64>
unit size <integer_cst 0x7ffff695bcc0 constant 8>
align 64 symtab 0 alias set -1 canonical type 0x7ffff695f930 precision
64 min <integer_cst 0x7ffff695bf30 -9223372036854775808> max <integer_cst
0x7ffff695bf48 9223372036854775807>
pointer_to_this <pointer_type 0x7ffff6980a80>>
V2DI
size <integer_cst 0x7ffff695bcf0 type <integer_type 0x7ffff695f2a0
bitsizetype> constant 128>
unit size <integer_cst 0x7ffff695bd08 type <integer_type 0x7ffff695f1f8
sizetype> constant 16>
align 128 symtab 0 alias set -1 canonical type 0x7ffff6a5fd20 nunits 2>
(gdb) call debug_tree(comp_vectype)
<vector_type 0x7ffff6a5fe70
type <boolean_type 0x7ffff6a5fc78 DI
size <integer_cst 0x7ffff695bca8 constant 64>
unit size <integer_cst 0x7ffff695bcc0 constant 8>
align 64 symtab 0 alias set -1 canonical type 0x7ffff6a5fc78 precision
64 min <integer_cst 0x7ffff6a8f918 -9223372036854775808> max <integer_cst
0x7ffff6a8f948 9223372036854775807>>
V2DI
size <integer_cst 0x7ffff695bcf0 type <integer_type 0x7ffff695f2a0
bitsizetype> constant 128>
unit size <integer_cst 0x7ffff695bd08 type <integer_type 0x7ffff695f1f8
sizetype> constant 16>
align 128 symtab 0 alias set -1 canonical type 0x7ffff6a5fe70 nunits 2>
In the end, GCC checks HAVE_vcond_mask_v2div2di which is defined as below on
i386:
#define HAVE_vcond_mask_v2div2di (TARGET_SSE4_2)
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #3 from ktkachov at gcc dot gnu.org ---
I'm testing a patch
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Subject: [Bug ada/70759] Ada rts fails to build with -mabi=ilp32
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Apr 28 10:49:13 2016
New Revision: 235553
URL: https://gcc.gnu.org/viewcvs?rev=235553&root=gcc&view=rev
Log:
Backport from mainline
2016-04-27 Eric Botcazou <ebotcazou@adacore.com>
PR ada/70759
* stor-layout.h (internal_reference_types): Delete.
* stor-layout.c (reference_types_internal): Likewise.
(internal_reference_types): Likewise.
(layout_type) <REFERENCE_TYPE>: Adjust.
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/ada/ChangeLog
branches/gcc-6-branch/gcc/ada/gcc-interface/misc.c
branches/gcc-6-branch/gcc/stor-layout.c
branches/gcc-6-branch/gcc/stor-layout.h
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
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--- Comment #18 from amker at gcc dot gnu.org ---
So the question is why if-conversion generates:
_43 = _44 & _45;
_ifc__40 = _43 ? 1 : 0;
n2_34 = n2_28 + _ifc__40;
Not:
_43 = _44 & _45;
_XXX = (long int) _43;
n2_34 = n2_28 + _XXX;
As in the good test.
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Subject: [Bug ada/70759] Ada rts fails to build with -mabi=ilp32
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Presumably fixed, but not tested at all.
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Subject: [Bug java/70839] [6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
URL| |https://gcc.gnu.org/ml/gcc-
| |patches/2016-04/msg01791.ht
| |ml
Last reconfirmed| |2016-04-28
CC| |doko at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Rainer Orth <ro at gcc dot gnu.org> ---
Alternative patch here:
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg01751.html
Mine posted, too.
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Subject: [Bug ada/70786] Missing "not" breaks Ada.Text_IO.Get_Immediate(File, Item, Available)
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Apr 28 10:58:54 2016
New Revision: 235555
URL: https://gcc.gnu.org/viewcvs?rev=235555&root=gcc&view=rev
Log:
PR ada/70786
* a-textio.adb (Get_Immediate): Add missing 'not' in expression.
Modified:
branches/gcc-6-branch/gcc/ada/ChangeLog
branches/gcc-6-branch/gcc/ada/a-textio.adb
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Subject: [Bug ada/70786] Missing "not" breaks Ada.Text_IO.Get_Immediate(File, Item, Available)
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Apr 28 10:58:38 2016
New Revision: 235554
URL: https://gcc.gnu.org/viewcvs?rev=235554&root=gcc&view=rev
Log:
PR ada/70786
* a-textio.adb (Get_Immediate): Add missing 'not' in expression.
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/a-textio.adb
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Subject: [Bug ada/70786] Missing "not" breaks Ada.Text_IO.Get_Immediate(File, Item, Available)
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Apr 28 10:59:05 2016
New Revision: 235556
URL: https://gcc.gnu.org/viewcvs?rev=235556&root=gcc&view=rev
Log:
PR ada/70786
* a-textio.adb (Get_Immediate): Add missing 'not' in expression.
Modified:
branches/gcc-5-branch/gcc/ada/ChangeLog
branches/gcc-5-branch/gcc/ada/a-textio.adb
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Subject: [Bug ada/70786] Missing "not" breaks Ada.Text_IO.Get_Immediate(File, Item, Available)
Date: Thu, 28 Apr 2016 11:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70786
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Apr 28 10:59:17 2016
New Revision: 235557
URL: https://gcc.gnu.org/viewcvs?rev=235557&root=gcc&view=rev
Log:
PR ada/70786
* a-textio.adb (Get_Immediate): Add missing 'not' in expression.
Modified:
branches/gcc-4_9-branch/gcc/ada/ChangeLog
branches/gcc-4_9-branch/gcc/ada/a-textio.adb
>From gcc-bugs-return-523532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 11:01:09 2016
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/70786] Missing "not" breaks Ada.Text_IO.Get_Immediate(File, Item, Available)
Date: Thu, 28 Apr 2016 11:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70786
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |4.9.4
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixed on all active branches.
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/70759] Ada rts fails to build with -mabi=ilp32
Date: Thu, 28 Apr 2016 11:01:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.2
>From gcc-bugs-return-523534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 11:21:49 2016
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From: "tuwwcn at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70845] New: inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
Date: Thu, 28 Apr 2016 11:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70845
Bug ID: 70845
Summary: inherited piecewise_construct_t constructor from
std::pair by "using-declarations" is missing
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tuwwcn at gmail dot com
Target Milestone: ---
This code is PASSED by gcc 5.3.0, but REJECTED by 6.1.0.(all using --std=c++14)
---------------------------
code is like this:
struct Test : public std::pair<int, std::string> {
using std::pair<int, std::string>::pair;
};
Test p(std::piecewise_construct, std::forward_as_tuple(1),
std::forward_as_tuple("abcd"));
---------------------------
Error messages produced by gcc 6.1.0 is:
error: use of deleted function ‘constexpr std::tuple< <template-parameter-1-1>
>::tuple(const std::tuple< <template-parameter-1-1> >&) [with _Elements =
{int&&}]’
using std::pair<int, std::string>::pair;
gcc-6.1.0/include/c++/6.1.0/tuple:633:17: note: ‘constexpr std::tuple<
<template-parameter-1-1> >::tuple(const std::tuple< <template-parameter-1-1>
>&) [with _Elements = {int&&}]’ is implicitly deleted because the default
definition would be ill-formed:
constexpr tuple(const tuple&) = default;
^~~~~
gcc-6.1.0/include/c++/6.1.0/tuple:633:17: error: use of deleted function
‘constexpr std::_Tuple_impl<_Idx, _Head>::_Tuple_impl(const
std::_Tuple_impl<_Idx, _Head>&) [with long unsigned int _Idx = 0ul; _Head =
int&&]’
gcc-6.1.0/include/c++/6.1.0/tuple:363:17: note: ‘constexpr
std::_Tuple_impl<_Idx, _Head>::_Tuple_impl(const std::_Tuple_impl<_Idx,
_Head>&) [with long unsigned int _Idx = 0ul; _Head = int&&]’ is implicitly
deleted because the default definition would be ill-formed:
constexpr _Tuple_impl(const _Tuple_impl&) = default;
^~~~~~~~~~~
gcc-6.1.0/include/c++/6.1.0/tuple:363:17: error: use of deleted function
‘constexpr std::_Head_base<_Idx, _Head, false>::_Head_base(const
std::_Head_base<_Idx, _Head, false>&) [with long unsigned int _Idx = 0ul; _Head
= int&&]’
gcc-6.1.0/include/c++/6.1.0/tuple:110:17: note: ‘constexpr
std::_Head_base<_Idx, _Head, false>::_Head_base(const std::_Head_base<_Idx,
_Head, false>&) [with long unsigned int _Idx = 0ul; _Head = int&&]’ is
implicitly deleted because the default definition would be ill-formed:
constexpr _Head_base(const _Head_base&) = default;
^~~~~~~~~~
gcc-6.1.0/include/c++/6.1.0/tuple:110:17: error: copying non-static data member
‘int&& std::_Head_base<0ul, int&&, false>::_M_head_impl’ of rvalue reference
type
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From: "hvksmr1996 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70846] New: GCC doesn't respond when compile my code
Date: Thu, 28 Apr 2016 11:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70846
Bug ID: 70846
Summary: GCC doesn't respond when compile my code
Product: gcc
Version: 5.3.0
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Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: hvksmr1996 at gmail dot com
Target Milestone: ---
Created attachment 38360
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38360&action=edit
Source code
I tried to compile this particular code using MinGW 5.3.0 in Windows 10 64-bit,
when I hit enter to execute compile command, the compiler didn't respond.
Here's my command: g++ -Wall -Wextra -std=c++14 -o main.exe main.cpp
I opened taskmgr and saw a process named 'cc1plus.exe' with CPU usage 28 - 30 %
(my CPU is Intel Core i5 4210U) and RAM usage increase overtime until I see and
error message "cc1plus.exe: out of memory allocating 348411175 bytes
"
I also attached my code here
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70843] [7 Regression] ICE in add_expr, at tree.c:7913
Date: Thu, 28 Apr 2016 11:36:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|arm |
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-28
CC| |jakub at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
int
foo (int x, int y)
{
return ({ int a = 5; a += x; a *= y; a; }) ? : 2;
}
ICEs everywhere.
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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++/70845] [6/7 Regression] inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
Date: Thu, 28 Apr 2016 11:38:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Component|c++ |libstdc++
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Complete testcase (would it really have hurt to include the headers to make the
testcase valid?)
#include <utility>
#include <string>
#include <tuple>
struct Test : public std::pair<int, std::string> {
using std::pair<int, std::string>::pair;
};
Test p(std::piecewise_construct, std::forward_as_tuple(1),
std::forward_as_tuple("abcd"));
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Subject: [Bug c++/70845] [6/7 Regression] inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-28
CC| |ville at gcc dot gnu.org
Summary|inherited |[6/7 Regression] inherited
|piecewise_construct_t |piecewise_construct_t
|constructor from std::pair |constructor from std::pair
|by "using-declarations" is |by "using-declarations" is
|missing |missing
Ever confirmed|0 |1
>From gcc-bugs-return-523539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 11:44:15 2016
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Subject: [Bug middle-end/70843] [7 Regression] ICE in add_expr, at tree.c:7913
Date: Thu, 28 Apr 2016 11:44:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38361
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38361&action=edit
gcc7-pr70843.patch
Untested fix.
>From gcc-bugs-return-523540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 11:48:48 2016
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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++/70847] New: exponential time in cp_fold for chained virtual function calls
Date: Thu, 28 Apr 2016 11:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70847
Bug ID: 70847
Summary: exponential time in cp_fold for chained virtual
function calls
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jens.maurer at gmx dot net
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Testcase:
struct D
{
virtual D& f();
};
void g()
{
D d;
d.f().f().f().f().f().f().f().f().f().f().f().f().f().f().f()
#if 1
.f().f().f().f().f().f().f().f().f().f().f()
#endif
;
}
$ time g++ -v -c tst.cxx
gcc version 6.1.0 (GCC)
[does not end]
Changing "#if 1" to "#if 0" yields:
$ time g++ -c output-strip.cxx
real 0m3.341s
"perf top" shows cp_fold, cp_fold_r, cp_walk_subtrees, and walk_tree_1
functions.
>From gcc-bugs-return-523541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 11:51:18 2016
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Subject: [Bug libstdc++/70845] [6/7 Regression] inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
Date: Thu, 28 Apr 2016 11:51:00 -0000
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--- Comment #2 from Wei-Wei Tu <tuwwcn at gmail dot com> ---
(In reply to Jonathan Wakely from comment #1)
> Complete testcase (would it really have hurt to include the headers to make
> the testcase valid?)
>
> #include <utility>
> #include <string>
> #include <tuple>
>
> struct Test : public std::pair<int, std::string> {
> using std::pair<int, std::string>::pair;
> };
>
> Test p(std::piecewise_construct, std::forward_as_tuple(1),
> std::forward_as_tuple("abcd"));
#include <string>
#include <utility>
#include <tuple>
struct Test : public std::pair<int, std::string> {
using std::pair<int, std::string>::pair;
};
int main() {
Test p(std::piecewise_construct, std::forward_as_tuple(1),
std::forward_as_tuple("abcd"));
}
This is the test case
>From gcc-bugs-return-523543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 11:55:56 2016
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Subject: [Bug c++/70847] exponential time in cp_fold for chained virtual function calls
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--- Comment #1 from Jens Maurer <jens.maurer at gmx dot net> ---
This situation is similar to bug 70342, except that my testcase
- involves no -fsanitize=undefined,
- is shorter,
- hinges on "virtual", and
- is a regression vs. gcc 5.x.
>From gcc-bugs-return-523542-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 11:55:56 2016
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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++/70344] [6/7 Regression] ICE on invalid code at -O1 and above on x86_64-linux-gnu in record_reference, at cgraphbuild.c:64
Date: Thu, 28 Apr 2016 11:55:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |NEW
CC| |jakub at gcc dot gnu.org
Summary|[6 Regression] ICE on valid |[6/7 Regression] ICE on
|code at -O1 and above on |invalid code at -O1 and
|x86_64-linux-gnu in |above on x86_64-linux-gnu
|adjust_temp_type, at |in record_reference, at
|cp/constexpr.c:1078 |cgraphbuild.c:64
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Indeed, r234434 fixed the ICE and r234695 started to ICE again on the #c0
testcase with -O1 -std=c++11.
>From gcc-bugs-return-523544-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 12:00:16 2016
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Subject: [Bug c++/70827] [6/7 regression] dubious use of deleted function in inherited constructor
Date: Thu, 28 Apr 2016 12:00:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is rejected since r233719.
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Subject: [Bug c++/70848] g++ arm-none-eabi ignores volatile qualifier
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--- Comment #2 from Hendrik Borghorst <hendrikborghorst at googlemail dot com> ---
Created attachment 38364
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Produced assembly
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Subject: [Bug c++/70848] g++ arm-none-eabi ignores volatile qualifier
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Subject: [Bug c++/70848] New: g++ arm-none-eabi ignores volatile qualifier
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70848
Bug ID: 70848
Summary: g++ arm-none-eabi ignores volatile qualifier
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: hendrikborghorst at googlemail dot com
Target Milestone: ---
Created attachment 38362
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38362&action=edit
Minimal example
After updating my g++ to version 6.1 (from 5.3) I've notived that my volatile
IO access in my arm (arm-none-eabi) research OS gets optimized out with -O1,-O2
and -O3.
I've also checked the amd64-elf variant and it works correct.
The minimal example worked on g++ 5.3 and before but with 6.1 only one STR
instruction is executed instead of three.
g++ info:
$ arm-none-eabi-g++ -v
Using built-in specs.
COLLECT_GCC=arm-none-eabi-g++
COLLECT_LTO_WRAPPER=/home/hendrik/sources/gcc-6.1/arm-none-eabi/libexec/gcc/arm-none-eabi/6.1.0/lto-wrapper
Target: arm-none-eabi
Configured with: ../gcc-6.1.0/configure --target=arm-none-eabi
--prefix=/home/hendrik/sources/gcc-6.1/arm-none-eabi --disable-nls
--enable-languages=c,c++ --without-headers
Thread model: single
gcc version 6.1.0 (GCC
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Subject: [Bug c++/70848] g++ arm-none-eabi ignores volatile qualifier
Date: Thu, 28 Apr 2016 12:08:00 -0000
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--- Comment #3 from Hendrik Borghorst <hendrikborghorst at googlemail dot com> ---
The sourcefile was compiled with:
arm-none-eabi-g++ -save-temps -O3 -c test.c
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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++/70847] [6/7 Regression] exponential time in cp_fold for chained virtual function calls
Date: Thu, 28 Apr 2016 12:09:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-28
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
Target Milestone|--- |6.2
Summary|exponential time in cp_fold |[6/7 Regression]
|for chained virtual |exponential time in cp_fold
|function calls |for chained virtual
| |function calls
Ever confirmed|0 |1
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r230365 aka C++ delayed folding branch merge.
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Subject: [Bug tree-optimization/70848] g++ arm-none-eabi ignores volatile qualifier
Date: Thu, 28 Apr 2016 12:14:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |arm
Status|UNCONFIRMED |NEW
Known to work| |4.9.4, 5.3.1
Keywords| |wrong-code
Last reconfirmed| |2016-04-28
Component|c++ |tree-optimization
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
Target Milestone|--- |6.2
Known to fail| |6.1.0, 7.0
--- Comment #4 from ktkachov at gcc dot gnu.org ---
Confirmed, also doesn't happen on aarch64.
The changes happen at tree-level. 035t.mergephi1 contains
void test() ()
{
<bb 2>:
MEM[(volatile int *)327221280B] = 97;
MEM[(volatile int *)327221280B] = 98;
MEM[(volatile int *)327221280B] = 99;
return;
}
but 036t.dse1 contains:
void test() ()
{
<bb 2>:
MEM[(volatile int *)327221280B] = 99;
return;
}
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I have a patch (it's not just a trivial addition of location_t parameters).
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Subject: [Bug tree-optimization/70848] [6/7 Regression] g++ arm-none-eabi ignores volatile qualifier
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--- Comment #5 from ktkachov at gcc dot gnu.org ---
Also, this happens only for g++, compiling with gcc doesn't eliminate the
stores
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Subject: [Bug libstdc++/70766] stream iterators, shared_lock, and atomic<T> should all use addressof and not &
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu Apr 28 12:33:07 2016
New Revision: 235565
URL: https://gcc.gnu.org/viewcvs?rev=235565&root=gcc&view=rev
Log:
libstdc++/70766 use std::addressof instead of operator&
PR libstdc++/70766
* include/bits/basic_ios.tcc (basic_ios::_M_cache_locale): Use
__addressof.
* include/bits/stream_iterator.h (istream_iterator, ostream_iterator):
Likewise.
* include/std/atomic (atomic<_Tp>): Likewise.
* include/std/shared_mutex (shared_lock): Likewise.
* testsuite/24_iterators/istream_iterator/70766.cc: New test.
* testsuite/24_iterators/ostream_iterator/70766.cc : New test.
* testsuite/29_atomics/atomic/60695.cc: Adjust dg-error line number.
* testsuite/29_atomics/atomic/70766.cc: New test.
* testsuite/30_threads/shared_lock/70766.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/24_iterators/istream_iterator/70766.cc
- copied, changed from r235564,
trunk/libstdc++-v3/testsuite/29_atomics/atomic/60695.cc
trunk/libstdc++-v3/testsuite/24_iterators/ostream_iterator/70766.cc
- copied, changed from r235564,
trunk/libstdc++-v3/testsuite/29_atomics/atomic/60695.cc
trunk/libstdc++-v3/testsuite/29_atomics/atomic/70766.cc
- copied, changed from r235564,
trunk/libstdc++-v3/testsuite/29_atomics/atomic/60695.cc
trunk/libstdc++-v3/testsuite/30_threads/shared_lock/70766.cc
- copied, changed from r235564,
trunk/libstdc++-v3/testsuite/29_atomics/atomic/60695.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/basic_ios.tcc
trunk/libstdc++-v3/include/bits/stream_iterator.h
trunk/libstdc++-v3/include/std/atomic
trunk/libstdc++-v3/include/std/shared_mutex
trunk/libstdc++-v3/testsuite/29_atomics/atomic/60695.cc
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Subject: [Bug tree-optimization/70840] revisit reassoc handling of pow / powi, amend match.pd for powi
Date: Thu, 28 Apr 2016 12:35:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Apr 28 12:34:28 2016
New Revision: 235566
URL: https://gcc.gnu.org/viewcvs?rev=235566&root=gcc&view=rev
Log:
2016-04-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/70840
* match.pd: powi(-x, y) and powi(|x|,y) -> powi(x,y) if y is even;
Fix pow(copysign(x, y), z) -> pow(x, z) and add powi variant;
Mark x * pow(x,c) -> pow(x,c+1) commutative.
Add powi(x,y) * powi(z,y) -> powi(x*z,y).
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
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Subject: [Bug tree-optimization/70848] [6/7 Regression] g++ arm-none-eabi ignores volatile qualifier
Date: Thu, 28 Apr 2016 12:45:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Somehow the C++ FE interferes with gimplification of the correct GENERIC prior
to gimplification.
>From gcc-bugs-return-523556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 12:46:28 2016
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From: "bernds at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/70826] [7 regression] many test cases fail starting with r235442
Date: Thu, 28 Apr 2016 12:46:00 -0000
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--- Comment #5 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Can you reproduce that with the testcase reduced a bit? What does the mfcr
instruction do?
>From gcc-bugs-return-523557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 12:52:57 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70848] [6/7 Regression] g++ arm-none-eabi ignores volatile qualifier
Date: Thu, 28 Apr 2016 12:52:00 -0000
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ah, no, it's still ok:
<bb 2>:
_1 = 327221280B;
*_1 ={v} 97;
_2 = 327221280B;
*_2 ={v} 98;
_3 = 327221280B;
*_3 ={v} 99;
return;
and it works for x86_64-linux. -O2:
_Z4testv:
.LFB0:
.cfi_startproc
movl $97, 327221280
movl $98, 327221280
movl $99, 327221280
ret
>From gcc-bugs-return-523558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 12:54:18 2016
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Subject: [Bug tree-optimization/70848] [6/7 Regression] g++ arm-none-eabi ignores volatile qualifier
Date: Thu, 28 Apr 2016 12:54:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
With an old cross to arm I can indeed see (.018t.ssa):
void test() ()
{
volatile int * _1;
volatile int * _4;
volatile int * _6;
<bb 2>:
_1 = 327221280B;
*_1 = 97;
_4 = 327221280B;
*_4 = 98;
_6 = 327221280B;
*_6 = 99;
return;
note the missing {v} at the assignments.
>From gcc-bugs-return-523559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 12:55:51 2016
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Subject: [Bug libstdc++/70766] stream iterators, shared_lock, and atomic<T> should all use addressof and not &
Date: Thu, 28 Apr 2016 12:55:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-523560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 12:59:16 2016
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Subject: [Bug tree-optimization/70848] [6/7 Regression] g++ arm-none-eabi ignores volatile qualifier
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--- Comment #9 from ktkachov at gcc dot gnu.org ---
This also happens for:
volatile int *p;
void test()
{
(*(volatile int*)(p)) = 'a';
(*(volatile int*)(p)) = 'b';
(*(volatile int*)(p)) = 'c';
}
if you don't want to write to pointer literals
>From gcc-bugs-return-523561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 13:15:00 2016
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Subject: [Bug bootstrap/70829] LTO bootstrap failure
Date: Thu, 28 Apr 2016 13:15:00 -0000
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--- Comment #3 from prathamesh3492 at gcc dot gnu.org ---
Works for me too with r235554.
Shall I close it with RESOLVED FIXED ?
Thanks,
Prathamesh
>From gcc-bugs-return-523563-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 13:24:29 2016
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Subject: [Bug tree-optimization/70848] [6/7 Regression] g++ arm-none-eabi ignores volatile qualifier
Date: Thu, 28 Apr 2016 13:24:00 -0000
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--- Comment #10 from ktkachov at gcc dot gnu.org ---
(In reply to Richard Biener from comment #8)
> With an old cross to arm I can indeed see (.018t.ssa):
>
> void test() ()
> {
> volatile int * _1;
> volatile int * _4;
> volatile int * _6;
>
> <bb 2>:
> _1 = 327221280B;
> *_1 = 97;
> _4 = 327221280B;
> *_4 = 98;
> _6 = 327221280B;
> *_6 = 99;
> return;
>
>
> note the missing {v} at the assignments.
I wonder why this doesn't happen on x86 or aarch64...
Is there some target hook called that erroneously strips the 'volatility' from
the type somewhere?
>From gcc-bugs-return-523562-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 13:24:02 2016
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
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--- Comment #9 from dhowells at redhat dot com <dhowells at redhat dot com> ---
> BTW: A low-hanging fruit in this area would be using new asm flags feature,
Heh - I remember asking for that years ago and being told it couldn't be done.
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--- Comment #10 from dhowells at redhat dot com <dhowells at redhat dot com> ---
A partial optimisation could be made if the mask is constant and only contains
one bit (or/xor) or only lacks one bit (and). That is the most common case in
the kernel by far, but it would still leave instances where the bit number is
dynamic.
>From gcc-bugs-return-523565-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 13:36:12 2016
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Subject: [Bug tree-optimization/70849] New: Loop can be vectorized through gathers on AVX2 platforms.
Date: Thu, 28 Apr 2016 13:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70849
Bug ID: 70849
Summary: Loop can be vectorized through gathers on AVX2
platforms.
Product: gcc
Version: 7.0
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Severity: normal
Priority: P3
Component: tree-optimization
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Simple test which will be attached is not vectorized as not profitable:
test.c:11:5: note: cost model: the vector iteration cost = 2061 divided by the
scalar iteration cost = 9 is greater or equal to the vectorization factor = 8.
test.c:11:5: note: not vectorized: vectorization not profitable.
test.c:11:5: note: not vectorized: vector version will never be profitable.
but it can be vectorized as icc does using gathers:
LOOP BEGIN at test.c(11,5)
remark #15388: vectorization support: reference c1[j] has aligned access
[ test.c(12,7) ]
remark #15388: vectorization support: reference c2[j] has aligned access
[ test.c(13,7) ]
remark #15388: vectorization support: reference c1[j] has aligned access
[ test.c(12,7) ]
remark #15388: vectorization support: reference c2[j] has aligned access
[ test.c(13,7) ]
remark #15415: vectorization support: gather was generated for the
variable <f[j+base]>, strided by 256 [ test.c(12,16) ]
remark #15415: vectorization support: gather was generated for the
variable <f[j+base+1]>, strided by 256 [ test.c(13,16) ]
remark #15415: vectorization support: gather was generated for the
variable <f[j+base]>, strided by 256 [ test.c(12,16) ]
remark #15415: vectorization support: gather was generated for the
variable <f[j+base+1]>, strided by 256 [ test.c(13,16) ]
remark #15305: vectorization support: vector length 8
remark #15300: LOOP WAS VECTORIZED
remark #15449: unmasked aligned unit stride stores: 4
remark #15460: masked strided loads: 4
remark #15475: --- begin vector loop cost summary ---
remark #15476: scalar loop cost: 18
remark #15477: vector loop cost: 12.000
remark #15478: estimated potential speedup: 1.500
remark #15488: --- end vector loop cost summary ---
LOOP END
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Subject: [Bug tree-optimization/70849] Loop can be vectorized through gathers on AVX2 platforms.
Date: Thu, 28 Apr 2016 13:37:00 -0000
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--- Comment #1 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Created attachment 38365
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38365&action=edit
test-case to reproduce
Must be compiled with -O3 -mavx2 options
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/70850] New: Bootstrap fails building libgo: gccgo: error: ../x86_64-pc-linux-gnu/libgo/zstdpkglist.go: No such file or directory
Date: Thu, 28 Apr 2016 13:37:00 -0000
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Bug ID: 70850
Summary: Bootstrap fails building libgo: gccgo: error:
../x86_64-pc-linux-gnu/libgo/zstdpkglist.go: No such
file or directory
Product: gcc
Version: 6.1.0
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When bootstrapping with command line:
./configure --prefix=$HOME/tools/stow/gcc-6.1.0
--enable-languages=c,c++,go,objc,obj-c++,fortran
System info:
$ lsb_release -a
LSB Version:
:core-4.1-amd64:core-4.1-noarch:cxx-4.1-amd64:cxx-4.1-noarch:desktop-4.1-amd64:desktop-4.1-noarch:languages-4.1-amd64:languages-4.1-noarch:printing-4.1-amd64:printing-4.1-noarch
Distributor ID: CentOS
Description: CentOS Linux release 7.2.1511 (Core)
Release: 7.2.1511
Codename: Core
Running either:
make
or
make -j3
It fails as follows:
make[2]: Entering directory
`/home/bdeegan/Downloads/gcc-6.1.0/host-x86_64-pc-linux-gnu/gotools'
/home/bdeegan/Downloads/gcc-6.1.0/host-x86_64-pc-linux-gnu/gcc/gccgo
-B/home/bdeegan/Downloads/gcc-6.1.0/host-x86_64-pc-linux-gnu/gcc/
-B/home/bdeegan/tools/stow/gcc-6.1.0/x86_64-pc-linux-gnu/bin/
-B/home/bdeegan/tools/stow/gcc-6.1.0/x86_64-pc-linux-gnu/lib/ -isystem
/home/bdeegan/tools/stow/gcc-6.1.0/x86_64-pc-linux-gnu/include -isystem
/home/bdeegan/tools/stow/gcc-6.1.0/x86_64-pc-linux-gnu/sys-include -g -O2
-static-libstdc++ -static-libgcc -L ../x86_64-pc-linux-gnu/libgo -L
../x86_64-pc-linux-gnu/libgo/.libs -o go
../.././gotools/../libgo/go/cmd/go/alldocs.go
../.././gotools/../libgo/go/cmd/go/build.go
../.././gotools/../libgo/go/cmd/go/clean.go
../.././gotools/../libgo/go/cmd/go/context.go
../.././gotools/../libgo/go/cmd/go/discovery.go
../.././gotools/../libgo/go/cmd/go/doc.go
../.././gotools/../libgo/go/cmd/go/env.go
../.././gotools/../libgo/go/cmd/go/fix.go
../.././gotools/../libgo/go/cmd/go/fmt.go
../.././gotools/../libgo/go/cmd/go/generate.go
../.././gotools/../libgo/go/cmd/go/get.go
../.././gotools/../libgo/go/cmd/go/go11.go
../.././gotools/../libgo/go/cmd/go/help.go
../.././gotools/../libgo/go/cmd/go/http.go
../.././gotools/../libgo/go/cmd/go/list.go
../.././gotools/../libgo/go/cmd/go/main.go
../.././gotools/../libgo/go/cmd/go/note.go
../.././gotools/../libgo/go/cmd/go/pkg.go
../.././gotools/../libgo/go/cmd/go/run.go
../.././gotools/../libgo/go/cmd/go/signal.go
../.././gotools/../libgo/go/cmd/go/signal_unix.go
../.././gotools/../libgo/go/cmd/go/test.go
../.././gotools/../libgo/go/cmd/go/testflag.go
../.././gotools/../libgo/go/cmd/go/tool.go
../.././gotools/../libgo/go/cmd/go/vcs.go
../.././gotools/../libgo/go/cmd/go/version.go
../.././gotools/../libgo/go/cmd/go/vet.go
../x86_64-pc-linux-gnu/libgo/zstdpkglist.go zdefaultcc.go
gccgo: error: ../x86_64-pc-linux-gnu/libgo/zstdpkglist.go: No such file or
directory
make[2]: *** [go] Error 1
make[2]: Leaving directory
`/home/bdeegan/Downloads/gcc-6.1.0/host-x86_64-pc-linux-gnu/gotools'
make[1]: *** [all-gotools] Error 2
make[1]: Leaving directory `/home/bdeegan/Downloads/gcc-6.1.0'
make: *** [all] Error 2
Please let me know if it would be helpful to upload the entire buildlog or any
other files.
It looks like the file is indeed available though:
find . -name zstdpkglist.go -print
./x86_64-pc-linux-gnu/32/libgo/zstdpkglist.go
./x86_64-pc-linux-gnu/libgo/zstdpkglist.go
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Subject: [Bug debug/68860] [6/7 regression] FAIL: gcc.dg/guality/pr36728-1.c -flto -O3 -g line 16/7 arg1 == 1
Date: Thu, 28 Apr 2016 13:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68860
Bill Seurer <seurer at linux dot vnet.ibm.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |seurer at linux dot vnet.ibm.com
--- Comment #9 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
The pr36728 and pr68860 test cases that check the arguments (where the
arguments are unused) all currently (and for a long time) fail on power. They
show up as "optimized out" in gdb as in the initial report here.
Is there some point to testing the value of the unused arguments in these test
cases?
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 16 arg1 == 1
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 16 arg2 == 2
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 16 arg3 == 3
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 16 arg4 == 4
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 16 arg5 == 5
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 16 arg6 == 6
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 16 arg7 == 30
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 18 arg1 == 1
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 18 arg2 == 2
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 18 arg3 == 3
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 18 arg4 == 4
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 18 arg5 == 5
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 18 arg6 == 6
FAIL: gcc.dg/guality/pr36728-2.c -O3 -g line 18 arg7 == 30
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 14 arg1 == 1
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 14 arg2 == 2
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 14 arg3 == 3
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 14 arg4 == 4
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 14 arg5 == 5
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 14 arg6 == 6
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 16 arg1 == 1
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 16 arg2 == 2
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 16 arg3 == 3
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 16 arg4 == 4
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 16 arg5 == 5
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none line 16 arg6 == 6
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 14 arg1 == 1
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 14 arg2 == 2
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 14 arg3 == 3
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 14 arg4 == 4
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 14 arg5 == 5
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 14 arg6 == 6
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg1 == 1
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg2 == 2
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg3 == 3
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg4 == 4
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg5 == 5
FAIL: gcc.dg/guality/pr68860-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg6 == 6
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg1 == 1
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg2 == 2
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg3 == 3
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg4 == 4
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg5 == 5
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg6 == 6
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 16 arg7 == 30
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 18 arg1 == 1
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 18 arg2 == 2
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 18 arg3 == 3
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 18 arg4 == 4
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 18 arg5 == 5
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 18 arg6 == 6
FAIL: gcc.dg/guality/pr36728-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects line 18 arg7 == 30
>From gcc-bugs-return-523569-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 13:48:41 2016
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Subject: [Bug debug/68860] [6/7 regression] FAIL: gcc.dg/guality/pr36728-1.c -flto -O3 -g line 16/7 arg1 == 1
Date: Thu, 28 Apr 2016 13:48:00 -0000
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--- Comment #10 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 28 Apr 2016, seurer at linux dot vnet.ibm.com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68860
>
> Bill Seurer <seurer at linux dot vnet.ibm.com> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |seurer at linux dot vnet.ibm.com
>
> --- Comment #9 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
> The pr36728 and pr68860 test cases that check the arguments (where the
> arguments are unused) all currently (and for a long time) fail on power. They
> show up as "optimized out" in gdb as in the initial report here.
>
> Is there some point to testing the value of the unused arguments in these test
> cases?
I think it is supposed to check the DW_TAG_GNU_call_site_parameter stuff.
You may want to double-check that is the case on x86_64 and debug why
the dwarf2out code doesn't work on ppc (it does some "interesting"
RTL deciphering which may not work on ppc for one or another reason)
>From gcc-bugs-return-523570-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 13:51:07 2016
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Subject: [Bug debug/68860] [6/7 regression] FAIL: gcc.dg/guality/pr36728-1.c -flto -O3 -g line 16/7 arg1 == 1
Date: Thu, 28 Apr 2016 13:51:00 -0000
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Bill Seurer from comment #9)
> The pr36728 and pr68860 test cases that check the arguments (where the
> arguments are unused) all currently (and for a long time) fail on power.
> They show up as "optimized out" in gdb as in the initial report here.
>
> Is there some point to testing the value of the unused arguments in these
> test cases?
Of course there is a point, in lots of real-world code many variables are
optimized away, either in whole functions or just part of it, yet users very
often still want to be able to query those values.
DWARF (starting with DWARF 4) has ways to express even that in the debug info,
using DW_OP_stack_value etc., if there is a way to compute their values from
some other registers, memory content, constants etc.
The various DWARF extensions we've added (many of them are going to be in DWARF
5) enhance that even further (e.g. the DW_OP_GNU_entry_value,
DW_OP_GNU_parameter_ref, DW_OP_GNU_implicit_pointer, etc.).
>From gcc-bugs-return-523571-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 13:56:54 2016
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Subject: [Bug libstdc++/70845] [6/7 Regression] inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
Date: Thu, 28 Apr 2016 13:56:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Wei-Wei Tu from comment #2)
> This is the test case
Yes, I know, I already added it in comment 1 :-)
Preprocessed source from gcc-5 fails, so this is due to some front-end change
(either getting stricter and diagnosing something bad in the library headers,
or a new FE bug).
>From gcc-bugs-return-523572-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:02:24 2016
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Subject: [Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion
Date: Thu, 28 Apr 2016 14:02:00 -0000
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--- Comment #19 from amker at gcc dot gnu.org ---
<bb 4>:
# i_27 = PHI <0(3), i_21(5)>
# n1_29 = PHI <0(3), n1_20(5)>
# n2_28 = PHI <0(3), n2_34(5)>
i.1_7 = (sizetype) i_27;
_9 = u_8(D) + i.1_7;
_11 = *_9;
_13 = v_12(D) + i.1_7;
_14 = *_13;
_17 = v_12(D) + i.1_7;
_18 = *_17;
_31 = _18 != 0;
_36 = (int) _31;
_48 = (long int) _36;
_45 = _11 != 0;
_44 = _14 == 0;
_43 = _44 & _45;
_ifc__40 = _43 ? 1 : 0;
n2_34 = n2_28 + _ifc__40;
prephitmp_49 = _11 != 0 ? 0 : _48;
n1_20 = n1_29 + prephitmp_49;
i_21 = i_27 + 1;
if (n_6(D) > i_21)
goto <bb 5>;
else
goto <bb 6>;
<bb 5>:
goto <bb 4>;
The difficult part is "prephitmp_49 = _11 != 0 ? 0 : _48;", which cannot be
simplified into:
_a = 18 != 0;
_b = _11 == 0;
_c = _a && _b;
prephitmp_49 = (long int)_c;
I don't know if there is easy fix to ifcvt so that this case can be vectorized
without vcond_mask...
>From gcc-bugs-return-523573-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:03:34 2016
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Subject: [Bug c++/70820] GCC incorrectly accepts code that accesses nested names in an incomplete type
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--- Comment #5 from Fabio Rocha <fdrocha at gmail dot com> ---
(In reply to Jonathan Wakely from comment #4)
> (In reply to Fabio Rocha from comment #3)
> > Still, it feels pretty strange that uncommenting the "First Assert" is what
> > makes the code incorrect...
>
> That's not strange at all, the assertion requires the value of the static
> data member, so it causes it to be instantiated, while the type is
> incomplete.
>
> Without that assertion the static data member is not instantiated until the
> definition of ::k, after the types are complete.
That makes sense, it's pretty nice that it works out like this.
For what it's worth, clang rejects the code, but I am convinced gcc is in the
right.
>From gcc-bugs-return-523574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:05:03 2016
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Subject: [Bug go/70850] Bootstrap fails building libgo: gccgo: error: ../x86_64-pc-linux-gnu/libgo/zstdpkglist.go: No such file or directory
Date: Thu, 28 Apr 2016 14:05:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Do not configure in srcdir.
>From gcc-bugs-return-523575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:07:50 2016
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Subject: [Bug tree-optimization/70849] Loop can be vectorized through gathers on AVX2 platforms.
Date: Thu, 28 Apr 2016 14:07:00 -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| |2016-04-28
Blocks| |53947
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The vectorizer uses interleaving for this. We don't consider other
options (like using scalar loads or gather loads) if that turns out not to be
profitable.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
>From gcc-bugs-return-523576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:08:53 2016
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Subject: [Bug c++/62314] Fix-it Hints
Date: Thu, 28 Apr 2016 14:08:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-28
Assignee|unassigned at gcc dot gnu.org |dmalcolm at gcc dot gnu.org
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--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Updated patch kit posted as:
https://gcc.gnu.org/ml/gcc-patches/2016-04/msg01835.html
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Subject: [Bug rtl-optimization/70826] [7 regression] many test cases fail starting with r235442
Date: Thu, 28 Apr 2016 14:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70826
--- Comment #6 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
mfcr is "move from condition register" and it copies the contents of the
condition register into a general-purpose register. In this case it copies the
condition register into "tmp".
I did some quick chopping on the source and this still produces the error:
/* { dg-do run } */
/* { dg-options "-fno-inline -fomit-frame-pointer" } */
/* { dg-additional-options "-mdynamic-no-pic" { target *-*-darwin* } } */
/* -fno-inline -maltivec -m32/-m64 -mmultiple/no-multiple -Os/-O2. */
#ifndef NO_BODY
#define abort() __builtin_abort ()
#define vec_all_eq(v1,v2) __builtin_vec_vcmpeq_p (2, v1, v2)
#define SET(T,R,V) register T R __asm__ (#R) = V
#define SET_GPR(R,V) SET (long, R, V)
#define SET_FPR(R,V) SET (double, R, V)
#define SET_VR(R,V) SET (__attribute__ ((vector_size (16))) int, R, V)
#define SET_CR(R,V) __asm__ __volatile__ ("mtcrf %0,%1" : : "n" (1<<(7-R)), "r"
(V<<(4*(7-R))) : "cr" #R)
#define TRASH_GPR(R) SET_GPR (R, 0)
#define TRASH_FPR(R) SET_FPR (R, 0)
#define TRASH_VR(R) SET_VR (R, val0)
#define TRASH_CR(R) SET_CR (R, 0)
#define TRASH_SOME_GPR TRASH_GPR (r30); TRASH_GPR (r31)
#define TRASH_SOME_FPR TRASH_FPR (fr28); TRASH_FPR (fr31)
#define TRASH_SOME_VR TRASH_VR (v26); TRASH_VR (v27); TRASH_VR (v31)
#define TRASH_SOME_CR TRASH_CR (2)
#define TRASH_ALL_GPR TRASH_GPR (r14); TRASH_GPR (r15); TRASH_GPR (r16);
TRASH_GPR (r17); TRASH_GPR (r18); TRASH_GPR (r19); TRASH_GPR (r20); TRASH_GPR
(r21); TRASH_GPR (r22); TRASH_GPR (r23); TRASH_GPR (r24); TRASH_GPR (r25);
TRASH_GPR (r26); TRASH_GPR (r27); TRASH_GPR (r28); TRASH_GPR (r29); TRASH_GPR
(r30); TRASH_GPR (r31)
#define TRASH_ALL_FPR TRASH_FPR (fr14); TRASH_FPR (fr15); TRASH_FPR (fr16);
TRASH_FPR (fr17); TRASH_FPR (fr18); TRASH_FPR (fr19); TRASH_FPR (fr20);
TRASH_FPR (fr21); TRASH_FPR (fr22); TRASH_FPR (fr23); TRASH_FPR (fr24);
TRASH_FPR (fr25); TRASH_FPR (fr26); TRASH_FPR (fr27); TRASH_FPR (fr28);
TRASH_FPR (fr29); TRASH_FPR (fr30); TRASH_FPR (fr31)
#define TRASH_ALL_VR TRASH_VR (v20); TRASH_VR (v21); TRASH_VR (v22); TRASH_VR
(v23); TRASH_VR (v24); TRASH_VR (v25); TRASH_VR (v26); TRASH_VR (v27); TRASH_VR
(v28); TRASH_VR (v29); TRASH_VR (v30); TRASH_VR (v31)
#define TRASH_ALL_CR TRASH_CR (2); TRASH_CR (3); TRASH_CR (4)
#define USE_SOME_GPR __asm__ __volatile__ ("#%0 %1" : : "r" (r30), "r" (r31))
#define USE_SOME_FPR __asm__ __volatile__ ("#%0 %1" : : "f" (fr28), "f" (fr31))
#define USE_SOME_VR __asm__ __volatile__ ("#%0 %1 %2" : : "v" (v26), "v" (v27),
"v" (v31))
#define USE_SOME_CR
#define USE_ALL_GPR __asm__ __volatile__ ("#%0 %1 %2 %3 %4 %5 %6 %7 %8 %9 %10
%11 %12 %13 %14 %15 %16 %17" : : "r" (r14), "r" (r15), "r" (r16), "r" (r17),
"r" (r18), "r" (r19), "r" (r20), "r" (r21), "r" (r22), "r" (r23), "r" (r24),
"r" (r25), "r" (r26), "r" (r27), "r" (r28), "r" (r29), "r" (r30), "r" (r31))
#define USE_ALL_FPR __asm__ __volatile__ ("#%0 %1 %2 %3 %4 %5 %6 %7 %8 %9 %10
%11 %12 %13 %14 %15 %16 %17" : : "f" (fr14), "f" (fr15), "f" (fr16), "f"
(fr17), "f" (fr18), "f" (fr19), "f" (fr20), "f" (fr21), "f" (fr22), "f" (fr23),
"f" (fr24), "f" (fr25), "f" (fr26), "f" (fr27), "f" (fr28), "f" (fr29), "f"
(fr30), "f" (fr31))
#define USE_ALL_VR __asm__ __volatile__ ("#%0 %1 %2 %3 %4 %5 %6 %7 %8 %9 %10
%11" : : "v" (v20), "v" (v21), "v" (v22), "v" (v23), "v" (v24), "v" (v25), "v"
(v26), "v" (v27), "v" (v28), "v" (v29), "v" (v30), "v" (v31))
#define USE_ALL_CR
#define INIT_GPR SET_GPR (r14, 14); SET_GPR (r15, 15); SET_GPR (r16, 16);
SET_GPR (r17, 17); SET_GPR (r18, 18); SET_GPR (r19, 19); SET_GPR (r20, 20);
SET_GPR (r21, 21); SET_GPR (r22, 22); SET_GPR (r23, 23); SET_GPR (r24, 24);
SET_GPR (r25, 25); SET_GPR (r26, 26); SET_GPR (r27, 27); SET_GPR (r28, 28);
SET_GPR (r29, 29); SET_GPR (r30, 30); SET_GPR (r31, 31)
#define INIT_FPR SET_FPR (fr14, 140.0); SET_FPR (fr15, 150.0); SET_FPR (fr16,
160.0); SET_FPR (fr17, 170.0); SET_FPR (fr18, 180.0); SET_FPR (fr19, 190.0);
SET_FPR (fr20, 200.0); SET_FPR (fr21, 210.0); SET_FPR (fr22, 220.0); SET_FPR
(fr23, 230.0); SET_FPR (fr24, 240.0); SET_FPR (fr25, 250.0); SET_FPR (fr26,
260.0); SET_FPR (fr27, 270.0); SET_FPR (fr28, 280.0); SET_FPR (fr29, 290.0);
SET_FPR (fr30, 300.0); SET_FPR (fr31, 310.0)
#define INIT_VR SET_VR (v20, val20); SET_VR (v21, val21); SET_VR (v22, val22);
SET_VR (v23, val23); SET_VR (v24, val24); SET_VR (v25, val25); SET_VR (v26,
val26); SET_VR (v27, val27); SET_VR (v28, val28); SET_VR (v29, val29); SET_VR
(v30, val30); SET_VR (v31, val31)
#define INIT_CR SET_CR (2, 6); SET_CR (3, 7); SET_CR (4, 8)
#ifdef __ALTIVEC__
__attribute__ ((vector_size (16))) int val0 = {0,0,0,0};
__attribute__ ((vector_size (16))) int val20 = {-201,-202,-203,-204};
__attribute__ ((vector_size (16))) int val21 = {-211,-212,-213,-214};
__attribute__ ((vector_size (16))) int val22 = {-221,-222,-223,-224};
__attribute__ ((vector_size (16))) int val23 = {-231,-232,-233,-234};
__attribute__ ((vector_size (16))) int val24 = {-241,-242,-243,-244};
__attribute__ ((vector_size (16))) int val25 = {-251,-252,-253,-254};
__attribute__ ((vector_size (16))) int val26 = {-261,-262,-263,-264};
__attribute__ ((vector_size (16))) int val27 = {-271,-272,-273,-274};
__attribute__ ((vector_size (16))) int val28 = {-281,-282,-283,-284};
__attribute__ ((vector_size (16))) int val29 = {-291,-292,-293,-294};
__attribute__ ((vector_size (16))) int val30 = {-301,-302,-303,-304};
__attribute__ ((vector_size (16))) int val31 = {-311,-312,-313,-314};
#define INIT_REGS INIT_VR; INIT_FPR; INIT_GPR; INIT_CR
#else
#ifndef __NO_FPRS__
#define INIT_REGS INIT_FPR; INIT_GPR; INIT_CR
#else
#define INIT_REGS INIT_GPR; INIT_CR
#endif
#endif
#define VERIFY_GPR if (r14 != 14 || r15 != 15 || r16 != 16 || r17 != 17 || r18
!= 18 || r19 != 19 || r20 != 20 || r21 != 21 || r22 != 22 || r23 != 23 || r24
!= 24 || r25 != 25 || r26 != 26 || r27 != 27 || r28 != 28 || r29 != 29 || r30
!= 30 || r31 != 31) abort ()
#define VERIFY_FPR if (fr14 != 140.0 || fr15 != 150.0 || fr16 != 160.0 || fr17
!= 170.0 || fr18 != 180.0 || fr19 != 190.0 || fr20 != 200.0 || fr21 != 210.0 ||
fr22 != 220.0 || fr23 != 230.0 || fr24 != 240.0 || fr25 != 250.0 || fr26 !=
260.0 || fr27 != 270.0 || fr28 != 280.0 || fr29 != 290.0 || fr30 != 300.0 ||
fr31 != 310.0) abort ()
#define VERIFY_VR if (!vec_all_eq (v20, val20) || !vec_all_eq (v21, val21) ||
!vec_all_eq (v22, val22) || !vec_all_eq (v23, val23) || !vec_all_eq (v24,
val24) || !vec_all_eq (v25, val25) || !vec_all_eq (v26, val26) || !vec_all_eq
(v27, val27) || !vec_all_eq (v28, val28) || !vec_all_eq (v29, val29) ||
!vec_all_eq (v30, val30) || !vec_all_eq (v31, val31)) abort ()
#define VERIFY_CR ({ int tmp; __asm__ __volatile__ ("mfcr %0" : "=r" (tmp)); if
((tmp & ((15 << 20) | (15 << 16) | (15 << 12))) != ((6 << 20) | (7 << 16) | (8
<< 12))) abort (); })
#ifdef __ALTIVEC__
#define VERIFY_REGS VERIFY_VR; VERIFY_FPR; VERIFY_GPR; VERIFY_CR
#else
#ifndef __NO_FPRS__
#define VERIFY_REGS VERIFY_FPR; VERIFY_GPR; VERIFY_CR
#else
#define VERIFY_REGS VERIFY_GPR; VERIFY_CR
#endif
#endif
#else /* NO_BODY */
/* For looking at prologue and epilogue code without distractions. */
#define abort()
#define TRASH_ALL_CR
#define TRASH_ALL_VR
#define TRASH_ALL_FPR
#define TRASH_ALL_GPR
#define USE_ALL_CR
#define USE_ALL_VR
#define USE_ALL_FPR
#define USE_ALL_GPR
#define TRASH_SOME_CR
#define TRASH_SOME_VR
#define TRASH_SOME_FPR
#define TRASH_SOME_GPR
#define USE_SOME_CR
#define USE_SOME_VR
#define USE_SOME_FPR
#define USE_SOME_GPR
#define INIT_REGS
#define VERIFY_REGS
#endif
void b_vfr (void)
{
char a[33000];
TRASH_SOME_VR;
TRASH_SOME_FPR;
TRASH_SOME_GPR;
USE_SOME_VR;
USE_SOME_FPR;
USE_SOME_GPR;
__asm __volatile ("#%0" : "=m" (a) : : "v26", "v27", "v31", "fr28", "fr31",
"r30", "r31");
}
void b_cvf (void)
{
char a[33000];
TRASH_SOME_CR;
TRASH_SOME_VR;
TRASH_SOME_FPR;
USE_SOME_CR;
USE_SOME_VR;
USE_SOME_FPR;
__asm __volatile ("#%0" : "=m" (a) : : "cr2", "v26", "v27", "v31", "fr28",
"fr31");
}
void b_vf (void)
{
char a[33000];
TRASH_SOME_VR;
TRASH_SOME_FPR;
USE_SOME_VR;
USE_SOME_FPR;
__asm __volatile ("#%0" : "=m" (a) : : "v26", "v27", "v31", "fr28", "fr31");
}
void b_cvr (void)
{
char a[33000];
TRASH_SOME_CR;
TRASH_SOME_VR;
TRASH_SOME_GPR;
USE_SOME_CR;
USE_SOME_VR;
USE_SOME_GPR;
__asm __volatile ("#%0" : "=m" (a) : : "cr2", "v26", "v27", "v31", "r30",
"r31");
}
int main (void)
{
INIT_REGS;
USE_ALL_CR;
USE_ALL_VR;
USE_ALL_FPR;
USE_ALL_GPR;
VERIFY_REGS;
b_vfr ();
VERIFY_REGS;
b_cvf ();
VERIFY_REGS;
b_vf ();
{
int tmp; __asm__ __volatile__ ("mfcr %0" : "=r" (tmp));
if ((tmp & ((15 << 20) | (15 << 16) | (15 << 12))) != ((6 << 20) | (7 <<
16) | (8 << 12))) abort ();
}
b_cvr ();
VERIFY_REGS;
return 0;
}
>From gcc-bugs-return-523578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:23:29 2016
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From: "vogt at linux dot vnet.ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/68860] [6/7 regression] FAIL: gcc.dg/guality/pr36728-1.c -flto -O3 -g line 16/7 arg1 == 1
Date: Thu, 28 Apr 2016 14:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68860
--- Comment #12 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
We've just been looking at this today for s390x which fails these tests for
various reasons too (actually we've located at least four different Gcc bugs by
looking at this test case). Some of the calculations in
allocate_dynamic_stack_space are weird, but that isn't the issue at hand (I'm
currently working on that).
We were planning to create a new bug report for this, but if it's already being
discussed ... S390x fails the checks "y == 2" probably because the
cprop_hardreg pass does something wrong with the var_location information.
We've only debugged this for "x" yet, but it's probably the same cause for "y".
After reload we have (s390x, -O3 -m64):
-- snip --
(insn 27 26 99 2 (parallel [
(set (reg/f:DI 15 %r15)
(minus:DI (reg/f:DI 15 %r15)
(reg:DI 2 %r2 [73])))
(clobber (reg:CC 33 %cc))
]) pr36728-1.c:12 1409 {*subdi3}
(expr_list:REG_DEAD (reg:DI 2 %r2 [73])
(expr_list:REG_UNUSED (reg:CC 33 %cc)
(nil))))
(insn 99 27 57 2 (set (reg/f:DI 1 %r1 [65])
(plus:DI (reg/f:DI 11 %r11)
(const_int 191 [0xbf]))) pr36728-1.c:10 1075 {*la_64}
(nil))
(insn 57 99 33 2 (set (reg/f:DI 3 %r3 [77])
(reg/f:DI 15 %r15)) pr36728-1.c:12 1073 {*movdi_64}
(nil))
(debug_insn 33 57 6 2 (var_location:DI x (plus:DI (reg/f:DI 3 %r3 [77])
(const_int 160 [0xa0]))) pr36728-1.c:12 -1
(nil))
-- snip --
Insn 27 adjusts the stack pointer, insn 57 copies it to r3 and insn 33 says
that "x" is at "r3 + 160". The following constant propagation pass
(cprop_hardreg) results in
-- snip --
(insn 27 26 99 2 (parallel [
(set (reg/f:DI 15 %r15)
(minus:DI (reg/f:DI 15 %r15)
(reg:DI 2 %r2 [73])))
(clobber (reg:CC 33 %cc))
]) pr36728-1.c:12 1409 {*subdi3}
(expr_list:REG_DEAD (reg:DI 2 %r2 [73])
(expr_list:REG_UNUSED (reg:CC 33 %cc)
(nil))))
(insn 99 27 57 2 (set (reg/f:DI 1 %r1 [65])
(plus:DI (reg/f:DI 11 %r11)
(const_int 191 [0xbf]))) pr36728-1.c:10 1075 {*la_64}
(nil))
(insn 57 99 33 2 (set (reg/f:DI 3 %r3 [77])
(reg/f:DI 15 %r15)) pr36728-1.c:12 1073 {*movdi_64}
(nil))
(debug_insn 33 57 6 2 (var_location:DI x (plus:DI (reg/f:DI 15 %r15 [77])
(const_int 160 [0xa0]))) pr36728-1.c:12 -1
(nil))
-- snip --
It has propagated the value of r15 into insn 33, so now the var_location is now
separated from the place when it actually becomes valid (after insn 27), and
further passes result in bogus DWARF location list for "x".
(This is assembly output with a patch I'm working on; y does not use alloca for
aligmnent; I think this is independent of the bug.)
-- snip --
.LVL0:
stmg %r11,%r15,88(%r15)
aghi %r15,-200
lgr %r11,%r15
.loc 1 12 0
aghi %r2,14
.LVL1:
nill %r2,65528
sgr %r15,%r2 <== set final value of stack pointer
.loc 1 15 0 <== location list for "x" should start here
lhi %r2,2
.loc 1 10 0
la %r1,191(%r11)
.LVL2: <== where location list for "x" actually starts
nill %r1,65504 <==
.loc 1 16 0 <== location list for "y" should start here
larl %r4,b
.loc 1 17 0
mvi 160(%r15),25
.loc 1 12 0
la %r3,160(%r15)
.LVL3:
.loc 1 18 0
larl %r5,a
.loc 1 15 0
st %r2,0(%r1)
.loc 1 16 0
...
-- snip --
Without checking the details for "y" yet we've noticed that there is no
location list for y in the DWARF info, so gdb happily prints random data from
the stack slot with "p y" when stopping at the first ".loc 1 16 0".
>From gcc-bugs-return-523579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:27:36 2016
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Subject: [Bug libstdc++/70845] [6/7 Regression] inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
Date: Thu, 28 Apr 2016 14:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70845
--- Comment #4 from Wei-Wei Tu <tuwwcn at gmail dot com> ---
(In reply to Jonathan Wakely from comment #3)
> (In reply to Wei-Wei Tu from comment #2)
> > This is the test case
>
> Yes, I know, I already added it in comment 1 :-)
>
> Preprocessed source from gcc-5 fails, so this is due to some front-end
> change (either getting stricter and diagnosing something bad in the library
> headers, or a new FE bug).
This is my first time to report a bug. I'm so sorry for missing the headers.
Is the code valid according to the language standard? (I'm not so sure about
it.)
This is the words about c++17 inherited constructors referred by
using-declarations(from cppreference):
If the using-declaration refers to a constructor of a direct base of the class
being defined (e.g. using Base::Base;), all constructors of that base (ignoring
member access) are made visible to overload resolution when initializing the
derived class.
If overload resolution selects an inherited constructor, it is accessible if it
would be accessible when used to construct an object of the corresponding base
class: the accessibility of the using-declaration that introduced it is
ignored.
If overload resolution selects one of the inherited constructors when
initializing an object of such derived class, then the Base subobject from
which the constructor was inherited is initialized using the inherited
constructor, and all other bases and members of Derived are initialized as if
by the defaulted default constructor (default member initializers are used if
provided, otherwise default initialization takes place). The entire
initialization is treated as a single function call: initialization of the
parameters of the inherited constructor is sequenced-before initialization of
any base or member of the derived object.
As with using-declarations for any other non-static member functions, if an
inherited constructor matches the signature of one of the constructors of
Derived, it is hidden from lookup by the version found in Derived. If one of
the inherited constructors of Base happens to have the signature that matches a
copy/move constructor of the Derived, it does not prevent implicit generation
of Derived copy/move constructor (which then hides the inherited version,
similar to using operator=).
>From gcc-bugs-return-523580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:30:41 2016
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Subject: [Bug c/70851] New: internal compiler error: in create_tmp_var, at gimple-expr.c:473
Date: Thu, 28 Apr 2016 14:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70851
Bug ID: 70851
Summary: internal compiler error: in create_tmp_var, at
gimple-expr.c:473
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: mpolacek at gcc dot gnu.org
Target Milestone: ---
enum E e;
void
foo (void)
{
int a[e];
}
$ ./cc1 -quiet q.c
q.c:1:8: error: storage size of ‘e’ isn’t known
enum E e;
^
q.c: In function ‘foo’:
q.c:6:3: internal compiler error: in create_tmp_var, at gimple-expr.c:473
int a[e];
^~~
0xacc7a2 create_tmp_var(tree_node*, char const*)
/home/marek/src/gcc/gcc/gimple-expr.c:473
0xaf6efc create_tmp_from_val
/home/marek/src/gcc/gcc/gimplify.c:498
0xaf7006 lookup_tmp_var
/home/marek/src/gcc/gcc/gimplify.c:519
0xaf71ee internal_get_tmp_var
/home/marek/src/gcc/gcc/gimplify.c:563
0xaf73f6 get_initialized_tmp_var(tree_node*, gimple**, gimple**)
/home/marek/src/gcc/gcc/gimplify.c:600
0xb0739c gimplify_save_expr
/home/marek/src/gcc/gcc/gimplify.c:4997
0xb20961 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/marek/src/gcc/gcc/gimplify.c:10575
0xb09cfd gimplify_stmt(tree_node**, gimple**)
/home/marek/src/gcc/gcc/gimplify.c:5688
0xafa38b gimplify_statement_list
/home/marek/src/gcc/gcc/gimplify.c:1537
0xb2135d gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/marek/src/gcc/gcc/gimplify.c:10704
0xb09cfd gimplify_stmt(tree_node**, gimple**)
/home/marek/src/gcc/gcc/gimplify.c:5688
0xaf8cf5 gimplify_bind_expr
/home/marek/src/gcc/gcc/gimplify.c:1142
0xb204a6 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
/home/marek/src/gcc/gcc/gimplify.c:10486
0xb09cfd gimplify_stmt(tree_node**, gimple**)
/home/marek/src/gcc/gcc/gimplify.c:5688
0xb23973 gimplify_body(tree_node*, bool)
/home/marek/src/gcc/gcc/gimplify.c:11433
0xb2420f gimplify_function_tree(tree_node*)
/home/marek/src/gcc/gcc/gimplify.c:11589
0x92cc55 cgraph_node::analyze()
/home/marek/src/gcc/gcc/cgraphunit.c:625
0x92e4dc analyze_functions
/home/marek/src/gcc/gcc/cgraphunit.c:1086
0x932ae8 symbol_table::finalize_compilation_unit()
/home/marek/src/gcc/gcc/cgraphunit.c:2542
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.
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Subject: =?UTF-8?B?W0J1ZyBjKysvNzA4MjJdIFs2LzcgUmVncmVzc2lvbl0gYm9ndXMgImVycm9y?= =?UTF-8?B?OiBsdmFsdWUgcmVxdWlyZWQgYXMgdW5hcnkg4oCYJuKAmSBvcGVyYW5kIiB3?= =?UTF-8?B?aXRoIEMrKzE0IHBhcmVudGhlc2l6ZWQgU0NPUEVfUkVG?Date: Thu, 28 Apr 2016 14:32:00 -0000
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Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-28
Assignee|unassigned at gcc dot gnu.org |ppalka at gcc dot gnu.org
Summary|bogus "error: lvalue |[6/7 Regression] bogus
|required as unary ‘&’ |"error: lvalue required as
|operand" with C++14 |unary ‘&’ operand" with
|parenthesized SCOPE_REF |C++14 parenthesized
| |SCOPE_REF
Ever confirmed|0 |1
--- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Caused by r234159
>From gcc-bugs-return-523582-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:36:48 2016
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Subject: [Bug c/70851] internal compiler error: in create_tmp_var, at gimple-expr.c:473
Date: Thu, 28 Apr 2016 14:36:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Target Milestone|--- |7.0
>From gcc-bugs-return-523583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:38:45 2016
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Subject: [Bug c++/70847] [6/7 Regression] exponential time in cp_fold for chained virtual function calls
Date: Thu, 28 Apr 2016 14:38:00 -0000
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Kai Tietz <ktietz at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |ktietz at gcc dot gnu.org
--- Comment #3 from Kai Tietz <ktietz at gcc dot gnu.org> ---
This seems to be related to cp_fold_r's behavior to walk subtree for
OBJ_TYPE_REF.
Normally we can assume that in case of an OBJ_TYPE_REF tree, it was already
folded. So we don't need to walk it again .
The following patch solves the issue for me on m32c.
Index: ../gcc/cp/cp-gimplify.c
===================================================================
--- ../gcc/cp/cp-gimplify.c (revision 235430)
+++ ../gcc/cp/cp-gimplify.c (working copy)
@@ -986,7 +986,8 @@
cp_walk_tree (&OMP_FOR_PRE_BODY (stmt), cp_fold_r, data, NULL);
*walk_subtrees = 0;
}
-
+ else if (code == OBJ_TYPE_REF)
+ *walk_subtrees = 0;
return NULL;
}
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Subject: [Bug go/70850] Bootstrap fails building libgo: gccgo: error: ../x86_64-pc-linux-gnu/libgo/zstdpkglist.go: No such file or directory
Date: Thu, 28 Apr 2016 14:38:00 -0000
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--- Comment #2 from Bill Deegan <bill at baddogconsulting dot com> ---
Rebuilding outside src dir. Will report.
It's a fairly slow machine so it may take a while.
>From gcc-bugs-return-523585-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:39:36 2016
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Subject: [Bug c/70851] internal compiler error: in create_tmp_var, at gimple-expr.c:473
Date: Thu, 28 Apr 2016 14:39:00 -0000
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
gcc34 worked ok:
$ gcc34 -c q.c
q.c:1: error: storage size of `e' isn't known
but even gcc44 ICEs.
>From gcc-bugs-return-523586-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:44:53 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug driver/70132] ARM -mcpu=native can cause a double free abort.
Date: Thu, 28 Apr 2016 14:44:00 -0000
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--- Comment #10 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Thu Apr 28 14:44:07 2016
New Revision: 235573
URL: https://gcc.gnu.org/viewcvs?rev=235573&root=gcc&view=rev
Log:
[ARM] PR driver/70132: Avoid double fclose in driver-arm.c
Backport from mainline
2016-03-23 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR driver/70132
* config/arm/driver-arm.c (host_detect_local_cpu): Reorder exit logic
to not call fclose twice on file.
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/arm/driver-arm.c
>From gcc-bugs-return-523587-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 14:51:26 2016
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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++/70845] [6/7 Regression] inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
Date: Thu, 28 Apr 2016 14:51:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, I think it's valid.
It started being rejected with r233719
PR c++/69842
* method.c (forward_parm): Handle parameter packs.
* lambda.c (maybe_add_lambda_conv_op): Use it for them.
>From gcc-bugs-return-523588-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:03:42 2016
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From: "bernds at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/70826] [7 regression] many test cases fail starting with r235442
Date: Thu, 28 Apr 2016 15:03:00 -0000
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Bernd Schmidt <bernds at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amodra at gcc dot gnu.org
--- Comment #7 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
So why is there any expectation that the condition register contains any
particular value?
Cc'ing Alan Modra who added the test.
>From gcc-bugs-return-523589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:05:19 2016
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From: "ktietz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70847] [6/7 Regression] exponential time in cp_fold for chained virtual function calls
Date: Thu, 28 Apr 2016 15:05:00 -0000
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--- Comment #4 from Kai Tietz <ktietz at gcc dot gnu.org> ---
As side-note: There is something pretty fishy in tree-pretty-print.c for
OBJ_TYPE_REF, too. We do here recurse endless. Simply add to command line
'-fdump-tree-original' for reproducing.
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/70828] broken array-type subarrays inside acc data in openacc
Date: Thu, 28 Apr 2016 15:10:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |openmp
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-28
CC| |jakub at gcc dot gnu.org
Assignee|cesar at gcc dot gnu.org |unassigned at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to cesar from comment #0)
> Created attachment 38351 [details]
> broken subarray
Translating that one to OpenMP ("acc data copy(a[10:80])" -> "omp target data
map(a[10:80])", and "acc parallel loop" -> "omp target"), the issue also
reproduces for OpenMP.
> Given an array-typed subarray with a non-zero base element on an acc data
> construct, the gimplifier will implicitly add a pcopy clause for any
> parallel and kernels construct which uses that array. The pcopy is correct,
> but this pcopy expects the entire array to be present on the accelerator.
> This ultimately results in a runtime failure when the base of the subarray
> is not element zero.
>
> This problem can be reproduced with the attached test case in trunk and
> gcc-6.
OpenACC 2.0a says that "[...] the compiler will implicitly determine data
attributes for variables that are referenced in the compute construct that do
not appear in a data clause on the compute construct or a lexically containing
data construct and do not have predetermined data attributes [...]". Indeed we
here have a "lexically containing data construct", so the compiler should use
that instead of implicitly determining conflicting (whole array) data
attributes.
Jakub, what's your take for OpenMP? From a quick scan of OpenMP 4.5, 2.15.5
"Data-mapping Attribute Rules and Clauses", in combination with 2.10.4 "target
Construct", to me it also appears as if the intention is that the outer target
data construct already defines the definitive data attributes for the array
inside the target region, without wanting the compiler to implicitly determine
conflicting (whole array) data attributes for the target region?
>From gcc-bugs-return-523591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:14:40 2016
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Subject: [Bug c/70852] New: ice in warn_for_memset
Date: Thu, 28 Apr 2016 15:14:00 -0000
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Bug ID: 70852
Summary: ice in warn_for_memset
Product: gcc
Version: 7.0
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Created attachment 38366
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38366&action=edit
C source code
The attached C code, when compiled by gcc trunk dated 20160428, does this
/home/dcb/rpmbuild/BUILD/allegro-4.4.2/addons/jpgalleg/src/decode.c:1054:2:
internal compiler error: Segmentation fault
memset(_jpeg_huffman_dc_table, 0, 4 * sizeof(HUFFMAN_TABLE));
^~~~~~
0xc438df crash_signal
../../src/trunk/gcc/toplev.c:333
0x6ed3da tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
../../src/trunk/gcc/tree.h:3147
0x6ed3da warn_for_memset(unsigned int, tree_node*, tree_node*, int)
../../src/trunk/gcc/c-family/c-common.c:11800
0x69cc49 c_parser_postfix_expression_after_primary
../../src/trunk/gcc/c/c-parser.c:8301
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From: "gerhard.steinmetz.fortran@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/69604] ICE in gfc_add_modify_loc, at fortran/trans.c:159
Date: Thu, 28 Apr 2016 15:14:00 -0000
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--- Comment #9 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
Update, using fresh new release gfortran-6 --version
GNU Fortran (SUSE Linux) 6.1.0 20160427 [gcc-6-branch revision 235475]
The error message has changed :
$ gfortran-6 -c z1.f90
internal compiler error: in conv_function_val, at fortran/trans-expr.c:3683
$ gfortran-6 -c z2.f90
internal compiler error: in conv_function_val, at fortran/trans-expr.c:3683
$ gfortran-6 -fcoarray=single -c z4.f90
$ gfortran-6 -fcoarray=lib -c z4.f90
# NO error now
As noted in comment 2, the error message depends on configuration,
still differs for --enable-checking=release and --enable-checking=yes.
---
And for the following examples there seems to be no ICEs for many
different combinations of compile options. Only one problem remaining
with -fcoarray=lib and -finit-real. For example -finit-real=zero :
$ gfortran-6 -fcoarray=single -finit-real=zero -c z4.f90
# NO error
$ gfortran-6 -fcoarray=lib -finit-real=zero -c z4.f90
internal compiler error: in fold_convert_loc, at fold-const.c:2256
$ gfortran-6 -fcoarray=lib -finit-real=zero -c z5_harald_anlauf.f90
internal compiler error: in fold_convert_loc, at fold-const.c:2256
$ gfortran-6 -fcoarray=lib -finit-real=zero -c z6_harald_anlauf.f90
internal compiler error: in fold_convert_loc, at fold-const.c:2256
$ gfortran-6 -fcoarray=lib -finit-real=zero -c z8_harald_anlauf.f90
internal compiler error: in fold_convert_loc, at fold-const.c:2256
---
Running some examples, with suboptimal results :
$ gfortran-6 -fcoarray=single z6_harald_anlauf_print_z.f90
$ a.out
( -4.75674592E-16, 1.53246000E-41)
$ gfortran-6 -fcoarray=single z8_harald_anlauf.f90
$ a.out
( 42.0000000 , 0.00000000 ) 42.0000000
( 42.0000000 , 0.00000000 ) 42.0000000
( 1.00000000 , 0.00000000 ) 2.00000000
( 1.00000000 , 0.00000000 ) 2.00000000
( 1.00000000 , 0.00000000 ) ( 1.54857493E-41, -9.79143559E+14)
2.00000000 2.00000000 ( 1.54857493E-41, -9.79143559E+14)
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From: "gerhard.steinmetz.fortran@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70853] New: ICE on pointing to null, in gfc_add_block_to_block, at fortran/trans.c:1599
Date: Thu, 28 Apr 2016 15:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70853
Bug ID: 70853
Summary: ICE on pointing to null, in gfc_add_block_to_block, at
fortran/trans.c:1599
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
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With the following codes :
$ cat z1.f90
program p
real, pointer :: z(:)
z(1:2) => null()
end
$ gfortran-6 -c z1.f90
internal compiler error: in gfc_add_block_to_block, at fortran/trans.c:1599
$ cat z2.f90
program p
real, pointer :: z(:)
z(2:1) => null()
end
$ gfortran-6 -c z2.f90
internal compiler error: in gfc_add_block_to_block, at fortran/trans.c:1599
$ gfortran-5.3.1 -c z2.f90
internal compiler error: Segmentation fault
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Subject: [Bug c/70852] ice in warn_for_memset
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70852
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-28
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed, will reduce & fix.
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/70595] Cilk Plus testsuite needs massive cleanup
Date: Thu, 28 Apr 2016 15:17:00 -0000
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--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Thu Apr 28 15:16:57 2016
New Revision: 235574
URL: https://gcc.gnu.org/viewcvs?rev=235574&root=gcc&view=rev
Log:
Cilk Plus testsuite needs massive cleanup (PR testsuite/70595)
gcc:
PR testsuite/70595
* doc/sourcebuild.texi (Effective-Target Keywords, Other
attributes): Document cilkplus_runtime.
gcc/testsuite:
PR testsuite/70595
* lib/target-supports.exp (check_libcilkrts_available): Rename to ...
(check_effective_target_cilkplus_runtime): ... this.
* g++.dg/cilk-plus/cilk-plus.exp: Adapt to it.
* gcc.dg/cilk-plus/cilk-plus.exp: Likewise.
* c-c++-common/cilk-plus/CK/cilk-for-2.c: Remove dg-do target selector.
Require cilkplus_runtime.
Don't add -lcilkrts.
* c-c++-common/cilk-plus/CK/cilk-fors.c: Likewise.
* c-c++-common/cilk-plus/CK/cilk_for_grain.c: Likewise.
* c-c++-common/cilk-plus/CK/cilk_for_ptr_iter.c: Likewise.
* c-c++-common/cilk-plus/CK/fib.c: Likewise.
* c-c++-common/cilk-plus/CK/fib_init_expr_xy.c: Likewise.
* c-c++-common/cilk-plus/CK/fib_no_return.c: Likewise.
* c-c++-common/cilk-plus/CK/fib_no_sync.c: Likewise.
* c-c++-common/cilk-plus/CK/nested_cilk_for.c: Likewise.
* c-c++-common/cilk-plus/CK/pr60586.c: Likewise.
* c-c++-common/cilk-plus/CK/pr69826-1.c: Likewise.
* c-c++-common/cilk-plus/CK/pr69826-2.c: Likewise.
* c-c++-common/cilk-plus/CK/spawnee_inline.c: Likewise.
* c-c++-common/cilk-plus/CK/spawner_inline.c: Likewise.
* c-c++-common/cilk-plus/CK/spawning_arg.c: Likewise.
* c-c++-common/cilk-plus/CK/steal_check.c: Likewise.
* c-c++-common/cilk-plus/CK/varargs_test.c: Likewise.
* g++.dg/cilk-plus/CK/catch_exc.cc: Likewise.
* g++.dg/cilk-plus/CK/cilk-for-tplt.cc: Likewise.
* g++.dg/cilk-plus/CK/const_spawn.cc: Likewise.
* g++.dg/cilk-plus/CK/fib-opr-overload.cc: Likewise.
* g++.dg/cilk-plus/CK/fib-tplt.cc: Likewise.
* g++.dg/cilk-plus/CK/for1.cc: Likewise.
* g++.dg/cilk-plus/CK/lambda_spawns.cc: Likewise.
* g++.dg/cilk-plus/CK/lambda_spawns_tplt.cc: Likewise.
* g++.dg/cilk-plus/CK/pr60586.cc: Likewise.
* g++.dg/cilk-plus/CK/pr66326.cc: Likewise.
* g++.dg/cilk-plus/CK/stl_iter.cc: Likewise.
* g++.dg/cilk-plus/CK/stl_rev_iter.cc: Likewise.
* g++.dg/cilk-plus/CK/stl_test.cc: Likewise.
* c-c++-common/cilk-plus/CK/pr63307.c: Remove dg-do target selector.
* c-c++-common/cilk-plus/SE/ef_error3.c: Likewise.
* c-c++-common/cilk-plus/SE/ef_error2.c: Explain target selector.
* c-c++-common/cilk-plus/CK/test__cilk.c: Run if
cilkplus_runtime.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/sourcebuild.texi
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/cilk-for-2.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/cilk-fors.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/cilk_for_grain.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/cilk_for_ptr_iter.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/fib.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/fib_init_expr_xy.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/fib_no_return.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/fib_no_sync.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/nested_cilk_for.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/pr60586.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/pr63307.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/pr69826-1.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/pr69826-2.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/spawnee_inline.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/spawner_inline.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/spawning_arg.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/steal_check.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/test__cilk.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/CK/varargs_test.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/SE/ef_error2.c
trunk/gcc/testsuite/c-c++-common/cilk-plus/SE/ef_error3.c
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/catch_exc.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/cilk-for-tplt.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/const_spawn.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/fib-opr-overload.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/fib-tplt.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/for1.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/lambda_spawns.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/lambda_spawns_tplt.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/pr60586.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/pr66326.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/stl_iter.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/stl_rev_iter.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/CK/stl_test.cc
trunk/gcc/testsuite/g++.dg/cilk-plus/cilk-plus.exp
trunk/gcc/testsuite/gcc.dg/cilk-plus/cilk-plus.exp
trunk/gcc/testsuite/lib/target-supports.exp
>From gcc-bugs-return-523594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:17:23 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70853] ICE on pointing to null, in gfc_add_block_to_block, at fortran/trans.c:1599
Date: Thu, 28 Apr 2016 15:17:00 -0000
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--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
Messages interchanged (v5/v6) with a user defined type :
$ cat z3.f90
program p
type t
end type
type(t), pointer :: z(:)
z(1:2) => null()
end
$ gfortran-6 -c z3.f90
internal compiler error: Segmentation fault
$ gfortran-5.3.1 -c z3.f90
internal compiler error: in gfc_add_block_to_block, at fortran/trans.c:1630
Another error message with "class" instead of "type" :
$ cat z4.f90
program p
type t
end type
class(t), pointer :: z(:)
z(1:2) => null()
end
$ gfortran-6 -c z4.f90
internal compiler error: in gfc_conv_descriptor_data_get, at
fortran/trans-array.c:144
$ gfortran-5.3.1 -c z4.f90
internal compiler error: Segmentation fault
>From gcc-bugs-return-523597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:19:09 2016
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/70595] Cilk Plus testsuite needs massive cleanup
Date: Thu, 28 Apr 2016 15:19:00 -0000
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--- Comment #5 from Rainer Orth <ro at gcc dot gnu.org> ---
Initial patch installed for 7.1, more TBD, to keep PR open.
>From gcc-bugs-return-523598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:20:54 2016
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From: "gerhard.steinmetz.fortran@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/69659] [6/7 Regression] ICE on using option -frepack-arrays, in gfc_conv_descriptor_data_get
Date: Thu, 28 Apr 2016 15:20:00 -0000
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--- Comment #8 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
> Can you confirm that the patch fixes the issue in all cases
> and does not raise new issues?
Yes, I can confirm this now.
FYI, there is a separate/independed issue, see pr70853 comment 1.
My best regards.
>From gcc-bugs-return-523599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:25:18 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70854] New: ICE in gfc_process_block_locals, at fortran/trans-decl.c:6447
Date: Thu, 28 Apr 2016 15:25:00 -0000
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Bug ID: 70854
Summary: ICE in gfc_process_block_locals, at
fortran/trans-decl.c:6447
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
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Target Milestone: ---
The following code with an inner block aborts when combined with
an appropriate option -finit-*. Here "integer" and -finit-integer :
$ cat z1.f90
program p
integer :: x(2), y(2)
block
integer, parameter :: a(2) = 0
x = a
block
y = 0
end block
end block
end
$ gfortran-6 -finit-integer=-7 -c z1.f90
internal compiler error: in gfc_process_block_locals, at
fortran/trans-decl.c:6447
$ gfortran-6 -finit-local-zero -c z1.f90
internal compiler error: in gfc_process_block_locals, at
fortran/trans-decl.c:6447
---
Compiles fine without that inner block :
$ cat z2.f90
program p
integer :: x(2), y(2)
block
integer, parameter :: a(2) = 0
x = a
y = 0
end block
end
$ gfortran-6 -finit-integer=-7 -c z2.f90
$ gfortran-6 -finit-local-zero -c z2.f90
# no ICE
>From gcc-bugs-return-523600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:25:59 2016
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Subject: [Bug java/70839] [6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70839
--- Comment #4 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Thu Apr 28 15:25:14 2016
New Revision: 235575
URL: https://gcc.gnu.org/viewcvs?rev=235575&root=gcc&view=rev
Log:
Don't include minor version in GCJ ABI version (PR java/70839)
PR java/70839
* decl.c (parse_version): Remove minor handling.
Modified:
trunk/gcc/java/decl.c
>From gcc-bugs-return-523601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:26:34 2016
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From: "gerhard.steinmetz.fortran@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70854] ICE in gfc_process_block_locals, at fortran/trans-decl.c:6447
Date: Thu, 28 Apr 2016 15:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70854
--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
Similar for other intrinsic types :
$ cat z3.f90
program p
real :: x(2), y(2)
block
real, parameter :: a(2) = 0.0
x = a
block
y = 0.0
end block
end block
end
$ gfortran-6 -finit-real=zero -c z3.f90
internal compiler error: in gfc_process_block_locals, at
fortran/trans-decl.c:6447
$ gfortran-6 -finit-real=inf -c z3.f90
internal compiler error: in gfc_process_block_locals, at
fortran/trans-decl.c:6447
$ gfortran-6 -finit-local-zero -c z3.f90
internal compiler error: in gfc_process_block_locals, at
fortran/trans-decl.c:6447
---
$ cat z5.f90
program p
logical :: x(2), y(2)
block
logical, parameter :: a(2) = .true.
x = a
block
y = .false.
end block
end block
end
$ gfortran-6 -finit-logical=true -c z5.f90
internal compiler error: in gfc_process_block_locals, at
fortran/trans-decl.c:6447
$ gfortran-6 -finit-local-zero -c z5.f90
internal compiler error: in gfc_process_block_locals, at
fortran/trans-decl.c:6447
---
$ cat z7.f90
program p
character :: x(2), y(2)
block
character, parameter :: a(2) = 'a'
x = a
block
y = 'y'
end block
end block
end
$ gfortran-6 -finit-character=7 -c z7.f90
internal compiler error: in gfc_process_block_locals, at
fortran/trans-decl.c:6447
$ gfortran-6 -finit-local-zero -c z7.f90
internal compiler error: in gfc_process_block_locals, at
fortran/trans-decl.c:6447
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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/70852] ice in warn_for_memset
Date: Thu, 28 Apr 2016 15:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70852
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
/* PR c/70852 */
/* { dg-do compile } */
/* { dg-options "-Wall" } */
extern void *memset (void *, int, __SIZE_TYPE__);
extern int A[];
void
fn1 (void)
{
memset (A, 0, 1);
}
>From gcc-bugs-return-523603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:30:40 2016
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Subject: [Bug c/70852] ice in warn_for_memset
Date: Thu, 28 Apr 2016 15:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70852
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
Target Milestone|--- |7.0
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The fix should be just:
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -11796,6 +11796,7 @@ warn_for_memset (location_t loc, tree arg0, tree arg2,
tree elt_type = TREE_TYPE (type);
tree domain = TYPE_DOMAIN (type);
if (!integer_onep (TYPE_SIZE_UNIT (elt_type))
+ && domain != NULL_TREE
&& TYPE_MAXVAL (domain)
&& TYPE_MINVAL (domain)
&& integer_zerop (TYPE_MINVAL (domain))
>From gcc-bugs-return-523604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:30:40 2016
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From: "gerhard.steinmetz.fortran@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70855] New: [6 Regression] ICE with -fopenmp in gfc_trans_omp_workshare(): Bad statement code
Date: Thu, 28 Apr 2016 15:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70855
Bug ID: 70855
Summary: [6 Regression] ICE with -fopenmp in
gfc_trans_omp_workshare(): Bad statement code
Product: gcc
Version: 6.1.0
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With GNU Fortran (SUSE Linux) 6.1.0 20160427
and optimization level -Og, -Os, -O1 or higher :
$ cat z1.f90
program p
integer, parameter :: m = 4
integer, parameter :: n = 2
real :: a(m,n)
real :: x(n)
real :: y(m)
a = 1.0
x = 1.0
!$omp parallel
!$omp workshare
y(1:m) = matmul ( a(1:m,1:n), x(1:n) )
!$omp end workshare
!$omp end parallel
end
$ gfortran-6 -O2 -fopenmp -c z1.f90
f951: internal compiler error: gfc_trans_omp_workshare(): Bad statement code
>From gcc-bugs-return-523605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:31:09 2016
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/70850] Bootstrap fails building libgo: gccgo: error: ../x86_64-pc-linux-gnu/libgo/zstdpkglist.go: No such file or directory
Date: Thu, 28 Apr 2016 15:31:00 -0000
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--- Comment #3 from Ian Lance Taylor <ian at airs dot com> ---
Do we support ./configure these days?
Historically we have only supported SRCDIR/configure run in an empty directory.
>From gcc-bugs-return-523606-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:34:28 2016
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From: "gerhard.steinmetz.fortran@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70856] New: [6 Regression] ICE with -fopenacc in get_constraint_for_ssa_var, at tree-ssa-structalias.c:2952
Date: Thu, 28 Apr 2016 15:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70856
Bug ID: 70856
Summary: [6 Regression] ICE with -fopenacc in
get_constraint_for_ssa_var, at
tree-ssa-structalias.c:2952
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
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Target Milestone: ---
Compiling the following snippet with optimization level -Os, -O2 or higher :
$ cat z1.f90
program p
print *, sin([1.0, 2.0])
print *, cos([1.0, 2.0])
end
$ gfortran-6 -O2 -fopenacc z1.f90
internal compiler error: in get_constraint_for_ssa_var, at
tree-ssa-structalias.c:2952
Affects several files from gfortran testsuite, too.
$ make check-fortran RUNTESTFLAGS="--target_board=unix/-fopenacc"
...
# of expected passes 40537
# of unexpected failures 1377
# of expected failures 62
# of unresolved testcases 609
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From: "gerhard.steinmetz.fortran@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70857] New: [6 Regression] ICE with -fopenmp -fopenacc in insert_vi_for_tree, at tree-ssa-structalias.c:2813
Date: Thu, 28 Apr 2016 15:36:00 -0000
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Bug ID: 70857
Summary: [6 Regression] ICE with -fopenmp -fopenacc in
insert_vi_for_tree, at tree-ssa-structalias.c:2813
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
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For testcase .../gcc/testsuite/gfortran.dg/gomp/gridify-1.f90
and optimization level -Og, -Os, -O1 or higher :
$ gfortran-6 -O2 -fopenmp -fopenacc -c gridify-1.f90
internal compiler error: in insert_vi_for_tree, at tree-ssa-structalias.c:2813
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Subject: [Bug driver/66849] Incorrect multilib chosen with -mthumb -mfloat-abi=hard
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--- Comment #7 from simon at pushface dot org ---
t-aprofile produced an excellent result - for me, anyway; it includes
everything I need (cortex-*), as well as a whole lot more - just lots of disk
space for multilibs.
>From gcc-bugs-return-523609-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 15:49:40 2016
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From: "steven at uplinklabs dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70858] New: __builtin_ia32_bextr_u64 ICE with '-m32 -march=core-avx2'
Date: Thu, 28 Apr 2016 15:49:00 -0000
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Bug ID: 70858
Summary: __builtin_ia32_bextr_u64 ICE with '-m32
-march=core-avx2'
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
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$ gcc -v
Using built-in specs.
COLLECT_GCC=/usr/bin/gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/6.1.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc-multilib/src/gcc-6.1.0/configure
--host=x86_64-unknown-linux-gnu --build=x86_64-unknown-linux-gnu
--target=x86_64-unknown-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
Thread model: posix
gcc version 6.1.0 (GCC)
Reduced testcase via creduce:
$ cat test.i
int a, b, c;
int d() { c = __builtin_ia32_bextr_u64(a, b); }
$ gcc -m32 -march=core-avx2 -c test.i
test.i: In function ‘d’:
test.i:2:1: error: unrecognizable insn:
int d() { c = __builtin_ia32_bextr_u64(a, b); }
^~~
(insn 9 8 10 2 (parallel [
(set (reg:DI 91 [ _6 ])
(unspec:DI [
(reg:DI 90 [ _5 ])
(reg:DI 88 [ _3 ])
] UNSPEC_BEXTR))
(clobber (reg:CC 17 flags))
]) test.i:2 -1
(nil))
test.i:2:1: internal compiler error: in extract_insn, at recog.c:2287
>From gcc-bugs-return-523610-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:01:02 2016
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Subject: [Bug c/70859] New: Bad column number in type-generic function errors
Date: Thu, 28 Apr 2016 16:00:00 -0000
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Bug ID: 70859
Summary: Bad column number in type-generic function errors
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The errors for calling type-generic floating-point built-in functions with bad
argument types point to the start of the line, not to the argument in question:
int f (void) { return __builtin_isfinite (0); }
int g (void) { return __builtin_isless (0, 0); }
t.c: In function 'f':
t.c:1:1: error: non-floating-point argument in call to function
'__builtin_isfinite'
int f (void) { return __builtin_isfinite (0); }
^~~
t.c: In function 'g':
t.c:2:1: error: non-floating-point arguments in call to function
'__builtin_isless'
int g (void) { return __builtin_isless (0, 0); }
^~~
For C++, they point to the closing parenthesis, which is closer, but still
wrong.
t.c: In function 'int f()':
t.c:1:44: error: non-floating-point argument in call to function
'__builtin_isfinite'
int f (void) { return __builtin_isfinite (0); }
^
t.c: In function 'int g()':
t.c:2:45: error: non-floating-point arguments in call to function
'__builtin_isless'
int g (void) { return __builtin_isless (0, 0); }
^
>From gcc-bugs-return-523611-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:01:04 2016
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Subject: [Bug go/70850] Bootstrap fails building libgo: gccgo: error: ../x86_64-pc-linux-gnu/libgo/zstdpkglist.go: No such file or directory
Date: Thu, 28 Apr 2016 16:01:00 -0000
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--- Comment #4 from Bill Deegan <bill at baddogconsulting dot com> ---
If it's not supported, perhaps it should issue error and exit?
(Build still running..)
>From gcc-bugs-return-523612-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:02:03 2016
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Subject: [Bug c++/66177] warn_unused_result doesn't work for non-PODs
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--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 38172 ***
>From gcc-bugs-return-523613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:02:04 2016
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Subject: [Bug c++/38172] warn_unused_result does not work with structs not containing a copy constructor
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--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> ---
*** Bug 66177 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:02:21 2016
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Subject: [Bug c++/38172] warn_unused_result does not work with structs not containing a copy constructor
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--- Comment #10 from Jason Merrill <jason at gcc dot gnu.org> ---
*** Bug 68469 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:02:20 2016
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Subject: [Bug c++/68469] warn_unused_result attribute ignored for templates return templates
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Dup.
*** This bug has been marked as a duplicate of bug 38172 ***
>From gcc-bugs-return-523616-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:03:23 2016
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Subject: [Bug c++/70487] warn_unused_result attribute doesn't warn when return type is class
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |jason at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 38172 ***
>From gcc-bugs-return-523617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:03:34 2016
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/38172] warn_unused_result does not work with structs not containing a copy constructor
Date: Thu, 28 Apr 2016 16:03:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |tkrimer at epochlabs dot com
--- Comment #11 from Jason Merrill <jason at gcc dot gnu.org> ---
*** Bug 70487 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:05:38 2016
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From: "ysrumyan at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
Date: Thu, 28 Apr 2016 16:05:00 -0000
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--- Comment #11 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Richard,
I slightly modify the patch proposed by you:
1. Apply loop->safelen check only if lim is invoked before loop vectorization
since its value could be non-correct (I simply add bool param to it).
2. I prohibit to apply this check if loop contains unanalyzed memory references
(e.g. calls, clobbers etc.).
With these changes all regressions related to omp simd support were disappeared
and the following failures left (because of changing order of transformation):
FAIL: gcc.dg/autopar/outer-6.c scan-tree-dump-times parloops2 "parallelizing
inner loop" 0
FAIL: gcc.dg/pr41783.c scan-tree-dump pre "pretmp[^\\n]* = a_global_var;"
FAIL: gcc.dg/tree-ssa/loadpre10.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre23.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre24.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre25.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre4.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre8.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/ssa-pre-16.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/ssa-pre-18.c scan-tree-dump pre "Replaced foo \\(f.y\\)"
FAIL: gcc.dg/tree-ssa/ssa-pre-20.c scan-tree-dump pre "New PHIs: 2"
FAIL: gcc.dg/tree-ssa/ssa-pre-3.c scan-tree-dump-times pre "Eliminated: 2" 1
FAIL: gfortran.dg/pr42108.f90 -O scan-tree-dump pre "in all uses of
countm1[^\n]* / "
FAIL: gfortran.dg/vect/fast-math-vect-8.f90 -O scan-tree-dump-times vect
"vectorized 1 loops" 1
What is your opinion?
>From gcc-bugs-return-523620-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:06:51 2016
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70860] New: [nvptx] Revisit cfun->machine->doing_call
Date: Thu, 28 Apr 2016 16:06:00 -0000
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Bug ID: 70860
Summary: [nvptx] Revisit cfun->machine->doing_call
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
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CC: amonakov at gcc dot gnu.org, bernds at gcc dot gnu.org,
nathan at gcc dot gnu.org
Target Milestone: ---
Target: nvptx
The r235511 changes for PR70760 exposed a problem in
gcc/config/nvptx/nvptx.c:nvptx_libcall_value, and Richard generally found that
one "fishy", and "suggest[ed] to remove cfun->machine->doing_call and revisit
the reason why it was added for PTX", see
<http://news.gmane.org/find-root.php?message_id=%3Calpine.LSU.2.11.1604281241260.13384%40t29.fhfr.qr%3E>
and following.
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Subject: [Bug ada/61027] gnatcmd gets SIGABRT during exception handling
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simon at pushface dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |5.1.0, 5.2.0
--- Comment #6 from simon at pushface dot org ---
Checked; fails (for cross-compilers - native compilers OK) with
6.0.1-RC-20160415. Will send in the patch now 6.1.0 is out.
I see I never sent in a patch - no wonder it’s not fixed.
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Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
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--- Comment #12 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Created attachment 38367
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38367&action=edit
modified patch
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Subject: [Bug middle-end/61229] warn_unused_result doesn't warn in unused inline function
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-28
CC| |jason at gcc dot gnu.org
Component|c++ |middle-end
Summary|warn_unused_result fails to |warn_unused_result doesn't
|work with member functions |warn in unused inline
| |function
Ever confirmed|0 |1
--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
The testcases in comments 2 and 3 are covered by bug 38172. The original issue
is with unused inline functions, and affects C as well:
__attribute__((warn_unused_result)) int callme( ) { return 42; }
inline void foo()
{
callme();
}
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Subject: [Bug java/70839] [6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
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--- Comment #5 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Thu Apr 28 16:21:41 2016
New Revision: 235578
URL: https://gcc.gnu.org/viewcvs?rev=235578&root=gcc&view=rev
Log:
Don't include minor version in GCJ ABI version (PR java/70839)
PR java/70839
* decl.c (parse_version): Remove minor handling.
Modified:
branches/gcc-6-branch/gcc/java/ChangeLog
branches/gcc-6-branch/gcc/java/decl.c
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Subject: [Bug target/70858] __builtin_ia32_bextr_u64 ICE with '-m32 -march=core-avx2'
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This builtin is not meant for -m32, only for -m64/-mx32. I'll tweak it so that
we don't allow this builtin there (the headers are doing the right thing
already).
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Subject: [Bug java/70839] [6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
Date: Thu, 28 Apr 2016 16:26:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |ro at gcc dot gnu.org
--- Comment #6 from Rainer Orth <ro at gcc dot gnu.org> ---
Fixed for 6.2, 7.1.
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Subject: [Bug tree-optimization/70841] reassoc fails to handle FP division
Date: Thu, 28 Apr 2016 16:28:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Related to PR55912.
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Subject: [Bug c/66425] (void) cast doesn't suppress __attribute__((warn_unused_result))
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |jason at gcc dot gnu.org
--- Comment #24 from Jason Merrill <jason at gcc dot gnu.org> ---
I agree that (void) should suppress the warning. Jakub, do you remember why
you made a different choice?
>From gcc-bugs-return-523628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:30:37 2016
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Subject: [Bug c++/54379] Suggestion for type attribute similar to warn_unused_result
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
C++17 adds the [[nodiscard]] attribute which can be applied to classes.
>From gcc-bugs-return-523629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 16:33:10 2016
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From: "nathanael.huebbe at informatik dot uni-hamburg.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/70842] [4.9/5/6/7 Regression] internal compiler error with character members within a polymorphic pointer
Date: Thu, 28 Apr 2016 16:33:00 -0000
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--- Comment #3 from nathanael.huebbe at informatik dot uni-hamburg.de ---
This is getting even nastier. As it turns out, even though the code I gave
above compiles, it does not produce correct results. To be precise, if I use a
routine like
subroutine bar(me)
class(t_Intermediate), pointer, intent(in) :: me
class(*), pointer :: meAlias
character(len = :), pointer :: textAlias
meAlias => me
select type(meAlias)
type is(t_Foo)
textAlias => meAlias%string
print*, "'"//textAlias//"', len = ", len(textAlias)
!OK
print*, "'"//meAlias%string//"', len = ",
len(meAlias%string) !string ok, len = nonsense
end select
end subroutine
I get some completely wrong length in the second `print` statement (like
`152660480`), even though the string itself is output correctly. Again, the
indirection via an additional pointer produces correct results.
Another curious fact is, that the large number is constant across objects
within a single run, but different when I restart my program. So I'm willing to
speculate that somehow the vtable pointer is mistaken for the string length,
but that may be completely wrong.
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Subject: [Bug c/66425] (void) cast doesn't suppress __attribute__((warn_unused_result))
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--- Comment #25 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #24)
> I agree that (void) should suppress the warning. Jakub, do you remember why
> you made a different choice?
I think the request came from Uli that it isn't that easy to suppress it, at
least initially the warning was meant for cases where it would be a major
security problem to ignore the return value.
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Subject: [Bug java/70839] [6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
Date: Thu, 28 Apr 2016 16:38:00 -0000
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--- Comment #7 from Matthias Klose <doko at gcc dot gnu.org> ---
Author: doko
Date: Thu Apr 28 16:37:27 2016
New Revision: 235582
URL: https://gcc.gnu.org/viewcvs?rev=235582&root=gcc&view=rev
Log:
2016-04-28 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
PR java/70839
* decl.c (parse_version): Remove minor handling.
Modified:
branches/gcc-5-branch/gcc/java/ChangeLog
branches/gcc-5-branch/gcc/java/decl.c
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Subject: [Bug java/70839] [5/6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
Date: Thu, 28 Apr 2016 16:39:00 -0000
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Matthias Klose <doko at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|6.2 |5.4
Summary|[6/7 regression] Every |[5/6/7 regression] Every
|libjava execution test |libjava execution test
|FAILs: Incorrect library |FAILs: Incorrect library
|ABI version detected |ABI version detected
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Subject: [Bug java/70839] [5/6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
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--- Comment #8 from Matthias Klose <doko at gcc dot gnu.org> ---
and 5.4.
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Subject: [Bug target/70668] nds32-elf toolchain fails to compile on OSX
Date: Thu, 28 Apr 2016 16:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70668
--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Thu Apr 28 16:50:41 2016
New Revision: 235583
URL: https://gcc.gnu.org/viewcvs?rev=235583&root=gcc&view=rev
Log:
nds32: Fix casesi (PR70668)
Expanders do not have more elements in the operands array than declared
in the pattern. So, we cannot use operands[5] here. Instead just
declare and use another rtx.
PR target/70668
* config/nds32/nds32.md (casesi): Don't access the operands array
out of bounds.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/nds32/nds32.md
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Subject: [Bug target/70858] __builtin_ia32_bextr_u64 ICE with '-m32 -march=core-avx2'
Date: Thu, 28 Apr 2016 17:07:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2016-04-28
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38368
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38368&action=edit
gcc7-pr70858.patch
Untested fix.
Note, these builtins aren't meant to be used directly, instead one should use
the wrappers in x86intrin.h (and headers that it includes), the underlying
implementation of those intrinsics can change.
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Subject: [Bug target/70858] __builtin_ia32_bextr_u64 ICE with '-m32 -march=core-avx2'
Date: Thu, 28 Apr 2016 17:07:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug target/70821] x86_64: __atomic_fetch_add/sub() uses XADD rather than DECL in some cases
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70821
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Apr 28 17:10:14 2016
New Revision: 235586
URL: https://gcc.gnu.org/viewcvs?rev=235586&root=gcc&view=rev
Log:
PR target/70821
* config/i386/sync.md (define_peephole2 *atomic_fetch_add_cmp<mode>):
Add new peephole2 where the first insn is *mov<mode>_or instead of
*mov<mode>_internal.
* gcc.target/i386/pr70821.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70821.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sync.md
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-523638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 17:16:19 2016
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Subject: [Bug target/70821] x86_64: __atomic_fetch_add/sub() uses XADD rather than DECL in some cases
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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 for 7.1+. As this is not a regression, not backporting this to release
branches.
>From gcc-bugs-return-523639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 17:44:43 2016
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From: "steven at uplinklabs dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70858] __builtin_ia32_bextr_u64 ICE with '-m32 -march=core-avx2'
Date: Thu, 28 Apr 2016 17:44:00 -0000
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--- Comment #3 from Steven Noonan <steven at uplinklabs dot net> ---
Cool. I'll let the project maintainer know to not use the __builtin_* variants.
_bextr_u32 and _bextr_u64 look much more friendly, too.
>From gcc-bugs-return-523640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 17:48:26 2016
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From: "wdijkstr at arm dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/70861] New: Improve code generation of switch tables
Date: Thu, 28 Apr 2016 17:48:00 -0000
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Bug ID: 70861
Summary: Improve code generation of switch tables
Product: gcc
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GCC uses a very basic check to determine whether to use a switch table. A
simple example from https://gcc.gnu.org/bugzilla/show_bug.cgi?id=11823 still
generates a huge table with mostly default entries with -O2:
int i;
int func(int a)
{
switch(a)
{
case 0: i = 20; break;
case 1: i = 50; break;
case 2: i = 29; break;
case 3: i = 20; break;
case 4: i = 50; break;
case 5: i = 29; break;
case 6: i = 20; break;
case 7: i = 50; break;
case 8: i = 29; break;
case 9: i = 79; break;
case 110: i = 27; break;
default: i = 77; break;
}
return i;
}
This shows several issues:
1. The density calculation is not adjustable depending on the expected size of
switch table entries (which depends on the target).
2. A table may contain not only 90% default entries, but they can be
consecutive as well. To avoid this the maximum number of default cases should
be limited to say 3x the average gap between real cases.
3. There is no reduction in minimum required density for larger switches - the
wastage becomes quite significant for larger switches and targets that use 4
bytes per table entry.
4. Dense regions and outlier values are not split off and handled seperately.
>From gcc-bugs-return-523641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 19:00:38 2016
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Subject: [Bug other/70346] [libvtv] 6.0-20160313 build succeeds, install fails: cannot stat '.libs/libvtv.a': No such file or directory
Date: Thu, 28 Apr 2016 19:00:00 -0000
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Bill Gates <gregnietsky at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |gregnietsky at gmail dot com
--- Comment #3 from Bill Gates <gregnietsky at gmail dot com> ---
Can confirm this problem using make v4 on x86_x32 build ...
make[10]: Entering directory
'/var/opt/dtsbuild/src/gcc/gcc-6.1.0/build-x86_32/x86_64-linux-gnux32/32/libvtv'
true DO=install multi-do # make
/usr/bin/mkdir -p '/usr/libx32/../lib'
/bin/sh ./libtool --mode=install /usr/bin/ginstall -c libvtv.la
'/usr/libx32/../lib'
libtool: install: /usr/bin/ginstall -c .libs/libvtv.so.0.0.0
/usr/libx32/../lib/libvtv.so.0.0.0
libtool: install: (cd /usr/libx32/../lib && { ln -s -f libvtv.so.0.0.0
libvtv.so.0 || { rm -f libvtv.so.0 && ln -s libvtv.so.0.0.0 libvtv.so.0; }; })
libtool: install: (cd /usr/libx32/../lib && { ln -s -f libvtv.so.0.0.0
libvtv.so || { rm -f libvtv.so && ln -s libvtv.so.0.0.0 libvtv.so; }; })
libtool: install: /usr/bin/ginstall -c .libs/libvtv.lai
/usr/libx32/../lib/libvtv.la
libtool: install: /usr/bin/ginstall -c .libs/libvtv.a
/usr/libx32/../lib/libvtv.a
/usr/bin/ginstall: cannot stat '.libs/libvtv.a': No such file or directory
Makefile:414: recipe for target 'install-toolexeclibLTLIBRARIES' failed
make[10]: *** [install-toolexeclibLTLIBRARIES] Error 1
make[10]: Leaving directory
'/var/opt/dtsbuild/src/gcc/gcc-6.1.0/build-x86_32/x86_64-linux-gnux32/32/libvtv'
Makefile:703: recipe for target 'install-am' failed
make[9]: *** [install-am] Error 2
make[9]: Leaving directory
'/var/opt/dtsbuild/src/gcc/gcc-6.1.0/build-x86_32/x86_64-linux-gnux32/32/libvtv'
Makefile:560: recipe for target 'install-recursive' failed
make[8]: *** [install-recursive] Error 1
make[8]: Leaving directory
'/var/opt/dtsbuild/src/gcc/gcc-6.1.0/build-x86_32/x86_64-linux-gnux32/32/libvtv'
Makefile:697: recipe for target 'install' failed
make[7]: *** [install] Error 2
make[7]: Leaving directory
'/var/opt/dtsbuild/src/gcc/gcc-6.1.0/build-x86_32/x86_64-linux-gnux32/32/libvtv'
Makefile:853: recipe for target 'multi-do' failed
make[6]: *** [multi-do] Error 1
make[6]: Leaving directory
'/var/opt/dtsbuild/src/gcc/gcc-6.1.0/build-x86_32/x86_64-linux-gnux32/libvtv'
Makefile:521: recipe for target 'install-multi' failed
make[5]: *** [install-multi] Error 2
make[5]: Leaving directory
'/var/opt/dtsbuild/src/gcc/gcc-6.1.0/build-x86_32/x86_64-linux-gnux32/libvtv'
Makefile:703: recipe for target 'install-am' failed
make[4]: *** [install-am] Error 2
make[4]: Leaving directory
'/var/opt/dtsbuild/src/gcc/gcc-6.1.0/build-x86_32/x86_64-linux-gnux32/libvtv'
Makefile:560: recipe for target 'install-recursive' failed
make[3]: *** [install-recursive] Error 1
make[3]: Leaving directory
'/var/opt/dtsbuild/src/gcc/gcc-6.1.0/build-x86_32/x86_64-linux-gnux32/libvtv'
Makefile:697: recipe for target 'install' failed
make[2]: *** [install] Error 2
make[2]: Leaving directory
'/var/opt/dtsbuild/src/gcc/gcc-6.1.0/build-x86_32/x86_64-linux-gnux32/libvtv'
Makefile:15399: recipe for target 'install-target-libvtv' failed
make[1]: *** [install-target-libvtv] Error 2
make[1]: Leaving directory '/var/opt/dtsbuild/src/gcc/gcc-6.1.0/build-x86_32'
Makefile:2323: recipe for target 'install' failed
make: *** [install] Error 2
>From gcc-bugs-return-523643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 19:02:06 2016
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Subject: [Bug c++/54379] Suggestion for type attribute similar to warn_unused_result
Date: Thu, 28 Apr 2016 19:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54379
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Apr 28 19:01:19 2016
New Revision: 235597
URL: https://gcc.gnu.org/viewcvs?rev=235597&root=gcc&view=rev
Log:
Implement C++17 [[nodiscard]] attribute.
PR c++/38172
PR c++/54379
gcc/c-family/
* c-lex.c (c_common_has_attribute): Handle nodiscard.
gcc/cp/
* parser.c (cp_parser_std_attribute): Handle [[nodiscard]].
* tree.c (handle_nodiscard_attribute): New.
(cxx_attribute_table): Add [[nodiscard]].
* cvt.c (cp_get_fndecl_from_callee, cp_get_callee_fndecl): New.
(maybe_warn_nodiscard): New.
(convert_to_void): Call it.
Added:
trunk/gcc/testsuite/c-c++-common/attr-warn-unused-result.c
- copied, changed from r235596,
trunk/gcc/testsuite/gcc.dg/attr-warn-unused-result.c
trunk/gcc/testsuite/g++.dg/cpp1z/nodiscard1.C
trunk/gcc/testsuite/g++.dg/cpp1z/nodiscard2.C
trunk/gcc/testsuite/g++.dg/cpp1z/nodiscard3.C
trunk/gcc/testsuite/g++.dg/warn/Wunused-result-2.C
Removed:
trunk/gcc/testsuite/gcc.dg/attr-warn-unused-result.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-lex.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/cvt.c
trunk/gcc/cp/tree.c
trunk/gcc/testsuite/g++.dg/cpp1z/feat-cxx1z.C
trunk/gcc/testsuite/g++.dg/warn/unused-result1.C
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Subject: [Bug c++/38172] warn_unused_result does not work with structs not containing a copy constructor
Date: Thu, 28 Apr 2016 19:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38172
--- Comment #12 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Apr 28 19:01:19 2016
New Revision: 235597
URL: https://gcc.gnu.org/viewcvs?rev=235597&root=gcc&view=rev
Log:
Implement C++17 [[nodiscard]] attribute.
PR c++/38172
PR c++/54379
gcc/c-family/
* c-lex.c (c_common_has_attribute): Handle nodiscard.
gcc/cp/
* parser.c (cp_parser_std_attribute): Handle [[nodiscard]].
* tree.c (handle_nodiscard_attribute): New.
(cxx_attribute_table): Add [[nodiscard]].
* cvt.c (cp_get_fndecl_from_callee, cp_get_callee_fndecl): New.
(maybe_warn_nodiscard): New.
(convert_to_void): Call it.
Added:
trunk/gcc/testsuite/c-c++-common/attr-warn-unused-result.c
- copied, changed from r235596,
trunk/gcc/testsuite/gcc.dg/attr-warn-unused-result.c
trunk/gcc/testsuite/g++.dg/cpp1z/nodiscard1.C
trunk/gcc/testsuite/g++.dg/cpp1z/nodiscard2.C
trunk/gcc/testsuite/g++.dg/cpp1z/nodiscard3.C
trunk/gcc/testsuite/g++.dg/warn/Wunused-result-2.C
Removed:
trunk/gcc/testsuite/gcc.dg/attr-warn-unused-result.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-lex.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/cvt.c
trunk/gcc/cp/tree.c
trunk/gcc/testsuite/g++.dg/cpp1z/feat-cxx1z.C
trunk/gcc/testsuite/g++.dg/warn/unused-result1.C
>From gcc-bugs-return-523644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 19:08:21 2016
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Subject: [Bug c/66425] (void) cast doesn't suppress __attribute__((warn_unused_result))
Date: Thu, 28 Apr 2016 19:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425
Steven Bosscher <steven at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |steven at gcc dot gnu.org
--- Comment #26 from Steven Bosscher <steven at gcc dot gnu.org> ---
Maybe make something like "-Wno-unused-result=[pedantic|nodiscard]", make
strict the current semantics of the flag and nodiscard the C++17 semantics
(and make that the default)?
>From gcc-bugs-return-523645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 19:19:48 2016
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From: "ryan.burn at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70862] New: [concepts] adding a concept-constrained version of a variable template causes multiple definition assembler error
Date: Thu, 28 Apr 2016 19:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70862
Bug ID: 70862
Summary: [concepts] adding a concept-constrained version of a
variable template causes multiple definition assembler
error
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ryan.burn at gmail dot com
Target Milestone: ---
Created attachment 38369
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38369&action=edit
reproduces the bug
The attached code should be valid and compiles with an older version of gcc
(20160120), but now breaks with (20160428) giving the following error:
/tmp/ccthKyXf.s: Assembler messages:
/tmp/ccthKyXf.s:269: Error: symbol
`_ZN4echo3htl14detail_conceptL23mappable_predicate_implE' is already defined
>From gcc-bugs-return-523646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 19:26:01 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70862] [concepts] adding a concept-constrained version of a variable template causes multiple definition assembler error
Date: Thu, 28 Apr 2016 19:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70862
--- Comment #1 from ryan.burn at gmail dot com ---
Simpler reproduction:
template <class... Tx>
concept bool C = true;
template <class... Tx>
constexpr bool a = false;
template <class... Tx>
requires C<Tx...>
constexpr bool a<Tx...> = true;
template <class... Tx>
requires a<Tx...>
void f(Tx...) {
}
int main() {
f();
f(3);
return 0;
}
>From gcc-bugs-return-523647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 19:34:19 2016
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Subject: [Bug target/70858] __builtin_ia32_bextr_u64 ICE with '-m32 -march=core-avx2'
Date: Thu, 28 Apr 2016 19:34:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Apr 28 19:33:34 2016
New Revision: 235607
URL: https://gcc.gnu.org/viewcvs?rev=235607&root=gcc&view=rev
Log:
PR target/70858
* config/i386/i386.c (bdesc_special_args): Add | OPTION_MASK_ISA_64BIT
to __builtin_ia32_lwpval64 and __builtin_ia32_lwpins64.
(bdesc_args): Add | OPTION_MASK_ISA_64BIT to __builtin_ia32_bextr_u64,
__builtin_ia32_bextri_u64, __builtin_ia32_bzhi_di,
__builtin_ia32_pdep_di and __builtin_ia32_pext_di.
* gcc.target/i386/pr70858.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70858.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/70861] Improve code generation of switch tables
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70861
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think we should turn this into the following:
((unsigned)a) <= 9 ? table[a] : (a == 110 ? 27 : 77);
That is pull out the 110/default case so table would be small.
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Subject: [Bug middle-end/70861] Improve code generation of switch tables
Date: Thu, 28 Apr 2016 19:45:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note I think if we had gotos instead of assignment here we should do the
similar thing for the switch table itself.
Note also the assignment to i is getting in the way for the switch to constant
table form.
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Subject: [Bug target/70858] __builtin_ia32_bextr_u64 ICE with '-m32 -march=core-avx2'
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70858
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Apr 28 19:45:48 2016
New Revision: 235609
URL: https://gcc.gnu.org/viewcvs?rev=235609&root=gcc&view=rev
Log:
PR target/70858
* config/i386/i386.c (bdesc_special_args): Add | OPTION_MASK_ISA_64BIT
to __builtin_ia32_lwpval64 and __builtin_ia32_lwpins64.
(bdesc_args): Add | OPTION_MASK_ISA_64BIT to __builtin_ia32_bextr_u64,
__builtin_ia32_bextri_u64, __builtin_ia32_bzhi_di,
__builtin_ia32_pdep_di and __builtin_ia32_pext_di.
* gcc.target/i386/pr70858.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr70858.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/70858] __builtin_ia32_bextr_u64 ICE with '-m32 -march=core-avx2'
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70858
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Apr 28 19:47:06 2016
New Revision: 235610
URL: https://gcc.gnu.org/viewcvs?rev=235610&root=gcc&view=rev
Log:
PR target/70858
* config/i386/i386.c (bdesc_special_args): Add | OPTION_MASK_ISA_64BIT
to __builtin_ia32_lwpval64 and __builtin_ia32_lwpins64.
(bdesc_args): Add | OPTION_MASK_ISA_64BIT to __builtin_ia32_bextr_u64,
__builtin_ia32_bextri_u64, __builtin_ia32_bzhi_di,
__builtin_ia32_pdep_di and __builtin_ia32_pext_di.
* gcc.target/i386/pr70858.c: New test.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/i386/pr70858.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/i386/i386.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/70858] __builtin_ia32_bextr_u64 ICE with '-m32 -march=core-avx2'
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70858
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Apr 28 19:52:02 2016
New Revision: 235611
URL: https://gcc.gnu.org/viewcvs?rev=235611&root=gcc&view=rev
Log:
PR target/70858
* config/i386/i386.c (bdesc_special_args): Add | OPTION_MASK_ISA_64BIT
to __builtin_ia32_lwpval64 and __builtin_ia32_lwpins64.
(bdesc_args): Add | OPTION_MASK_ISA_64BIT to __builtin_ia32_bextr_u64,
__builtin_ia32_bextri_u64, __builtin_ia32_bzhi_di,
__builtin_ia32_pdep_di and __builtin_ia32_pext_di.
* gcc.target/i386/pr70858.c: New test.
Added:
branches/gcc-4_9-branch/gcc/testsuite/gcc.target/i386/pr70858.c
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/config/i386/i386.c
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed everywhere.
>From gcc-bugs-return-523654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 19:59:22 2016
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70845] [6/7 Regression] inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
Date: Thu, 28 Apr 2016 19:59:00 -0000
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Ville Voutilainen <ville.voutilainen at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ville.voutilainen at gmail dot com
--- Comment #6 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Here's a test snippet without library types. Clang accepts the code, gcc
rejects it.
template <class T>
struct holder
{
T t;
};
template <class... Args>
struct tuple_holder : holder<Args...>
{
tuple_holder(Args&&... args) : holder<Args>{static_cast<Args&&>(args)}...
{}
tuple_holder(const tuple_holder&) = default;
tuple_holder(tuple_holder&&) = default;
};
template <class T, class U>
struct my_pair
{
template <class... Args>
my_pair(tuple_holder<Args...>) {}
my_pair(const my_pair&) = default;
};
template <class T, class U>
struct my_real_pair : my_pair<T, U>
{
using my_pair<T, U>::my_pair;
};
int main()
{
my_real_pair<int, float>(tuple_holder<int&&>(1));
}
prog.cc: In constructor 'my_real_pair<int,
float>::my_real_pair(tuple_holder<Args ...>) [with Args = {int&&}]':
prog.cc:26:26: error: use of deleted function
'tuple_holder<Args>::tuple_holder(const tuple_holder<Args>&) [with Args =
{int&&}]'
using my_pair<T, U>::my_pair;
^~~~~~~
prog.cc:11:5: note: 'tuple_holder<Args>::tuple_holder(const
tuple_holder<Args>&) [with Args = {int&&}]' is implicitly deleted because the
default definition would be ill-formed:
tuple_holder(const tuple_holder&) = default;
^~~~~~~~~~~~
prog.cc:11:5: error: use of deleted function 'holder<int&&>::holder(const
holder<int&&>&)'
prog.cc:2:8: note: 'holder<int&&>::holder(const holder<int&&>&)' is implicitly
deleted because the default definition would be ill-formed:
struct holder
^~~~~~
prog.cc:2:8: error: copying non-static data member 'int&& holder<int&&>::t' of
rvalue reference type
prog.cc: In function 'int main()':
prog.cc:31:52: note: synthesized method 'my_real_pair<int,
float>::my_real_pair(tuple_holder<Args ...>) [with Args = {int&&}]' first
required here
my_real_pair<int, float>(tuple_holder<int&&>(1));
^
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Subject: [Bug libstdc++/70845] [6/7 Regression] inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
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Ville Voutilainen <ville.voutilainen at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at redhat dot com
--- Comment #7 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
If I use my_pair directly, gcc accepts the code. Once the inherited constructor
and my_real_pair are thrown into the mix, gcc starts rejecting the code.
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Subject: [Bug fortran/70863] New: Finalization of array of derived type causes segfault
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70863
Bug ID: 70863
Summary: Finalization of array of derived type causes segfault
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: weiqun.zhang at gmail dot com
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Created attachment 38370
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38370&action=edit
A program demonstrating the problem.
In the attached program, there is a derived type named c, which contains an
array of derived type b. The finalization of a c object causes segfault.
>From gcc-bugs-return-523657-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 20:20:36 2016
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Subject: [Bug target/70668] nds32-elf toolchain fails to compile on OSX
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2016-04-28
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--- Comment #7 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Fixed on trunk, backports pending.
>From gcc-bugs-return-523658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 20:23:01 2016
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Subject: [Bug target/68803] gcc.vect/powerpc/20050603-3.c failures since r230167
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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>From gcc-bugs-return-523659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 21:04:23 2016
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From: "weiqun.zhang at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70864] New: internal compiler error: in gfc_get_symbol_decl, at fortran/trans-decl.c:1403
Date: Thu, 28 Apr 2016 21:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70864
Bug ID: 70864
Summary: internal compiler error: in gfc_get_symbol_decl, at
fortran/trans-decl.c:1403
Product: gcc
Version: 6.1.0
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Created attachment 38371
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38371&action=edit
code demonstrating the problem
Internal compiler error is encountered when compiling the attached code:
$ gfortran -c mymod.f90
mymod.f90:31:0:
end module multifab_module
internal compiler error: in gfc_get_symbol_decl, at fortran/trans-decl.c:1403
0x69f0eb gfc_get_symbol_decl(gfc_symbol*)
../../../src/gcc-6.1.0/gcc/fortran/trans-decl.c:1403
0x6a13a7 generate_local_decl
../../../src/gcc-6.1.0/gcc/fortran/trans-decl.c:5220
0x66a1db do_traverse_symtree
../../../src/gcc-6.1.0/gcc/fortran/symbol.c:3817
0x6a1fda generate_local_vars
../../../src/gcc-6.1.0/gcc/fortran/trans-decl.c:5410
0x6a1fda gfc_generate_function_code(gfc_namespace*)
../../../src/gcc-6.1.0/gcc/fortran/trans-decl.c:6089
0x682281 gfc_generate_module_code(gfc_namespace*)
../../../src/gcc-6.1.0/gcc/fortran/trans.c:2058
0x63af8d translate_all_program_units
../../../src/gcc-6.1.0/gcc/fortran/parse.c:5600
0x63af8d gfc_parse_file()
../../../src/gcc-6.1.0/gcc/fortran/parse.c:5819
0x67c0d5 gfc_be_parse_file
../../../src/gcc-6.1.0/gcc/fortran/f95-lang.c:201
>From gcc-bugs-return-523660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 21:15:33 2016
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Subject: [Bug c++/70507] integer overflow builtins not constant expressions
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Testing a patch.
>From gcc-bugs-return-523661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 21:19:03 2016
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From: "bill at baddogconsulting dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/70850] Bootstrap fails building libgo: gccgo: error: ../x86_64-pc-linux-gnu/libgo/zstdpkglist.go: No such file or directory
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Bill Deegan <bill at baddogconsulting dot com> changed:
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--- Comment #5 from Bill Deegan <bill at baddogconsulting dot com> ---
That did the trick. Thanks!.
>From gcc-bugs-return-523662-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 21:32:44 2016
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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++/70552] __builtin_constant_p fails to reflect the constness of constexpr calls
Date: Thu, 28 Apr 2016 21:32:00 -0000
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--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
See also bug 54021 for additional background.
>From gcc-bugs-return-523663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 21:46:36 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70855] [6 Regression] ICE with -fopenmp in gfc_trans_omp_workshare(): Bad statement code
Date: Thu, 28 Apr 2016 21:46:00 -0000
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Harald Anlauf <anlauf at gmx dot de> changed:
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--- Comment #1 from Harald Anlauf <anlauf at gmx dot de> ---
The ICE disappears with -fno-frontend-optimize.
Possibly related to the recent attempts to inline matmul?
>From gcc-bugs-return-523664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 21:47:29 2016
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From: "wdijkstr at arm dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/70861] Improve code generation of switch tables
Date: Thu, 28 Apr 2016 21:47:00 -0000
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--- Comment #3 from Wilco <wdijkstr at arm dot com> ---
(In reply to Andrew Pinski from comment #2)
> Note I think if we had gotos instead of assignment here we should do the
> similar thing for the switch table itself.
Absolutely, that was my point.
> Note also the assignment to i is getting in the way for the switch to
> constant table form.
In SSA form you can sink the assignments into a shared block, so it should be
able deal with an identical assignment to a global, pointer, array or even
returning directly. Also it's common that the default or a few other cases are
doing something different, so those need to be pulled out separately.
However that's icing on the cake - the key issue is that GCC doesn't even do
the basic stuff yet. Most compilers are able to split off cases with high
profile counts, dense switch tables, ranges that all go to the same block etc.
>From gcc-bugs-return-523665-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Apr 28 22:05:54 2016
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Subject: [Bug middle-end/65960] ICE in Cilk spawn with argument with non-trivial constructor
Date: Thu, 28 Apr 2016 22:05:00 -0000
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ryan.burn at gmail dot com changed:
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CC| |ryan.burn at gmail dot com
--- Comment #2 from ryan.burn at gmail dot com ---
This should be fixed now. I just checked with gcc-7.
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Thu, 28 Apr 2016 22:10:00 -0000
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Bug 69582 depends on bug 65960, which changed state.
Bug 65960 Summary: ICE in Cilk spawn with argument with non-trivial constructor
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65960
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Subject: [Bug middle-end/65960] ICE in Cilk spawn with argument with non-trivial constructor
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Jeffrey A. Law <law at redhat dot com> changed:
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--- Comment #3 from Jeffrey A. Law <law at redhat dot com> ---
Per c#2.
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From: "ryan.burn at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70865] New: [cilkplus] errors when using cilk features with precompiled headers
Date: Thu, 28 Apr 2016 22:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70865
Bug ID: 70865
Summary: [cilkplus] errors when using cilk features with
precompiled headers
Product: gcc
Version: 6.0
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Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ryan.burn at gmail dot com
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Created attachment 38372
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38372&action=edit
example that reproduces the problem
Using cilk features in a precompiled header file causes various compilation
bugs if the options "-std=c++1z" and "-fconcepts" are also used. I attached an
example that reproduces the bug. The code should compile fine (and does so, if
not using a pch or not using cilk features), but depending on what options are
used, gcc produces these different errors.
Using both "-std=c++1z -fconcepts -fcilkplus" (reproduced with Makefile),
causes the error:
cc1plus: error: using result of function returning ‘void’
(null):0: confused by earlier errors, bailing out
make: *** [a] Error 1
Using just "-std=c++1z" (Makefile.v2), causes the error:
cc1plus: internal compiler error: Segmentation fault
0xb45bff crash_signal
../../gcc/gcc/toplev.c:333
0x95565c gimplify_call_expr
../../gcc/gcc/gimplify.c:2486
0x94d339 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
../../gcc/gcc/gimplify.c:10258
0x95a381 force_gimple_operand_1(tree_node*, gimple**, bool (*)(tree_node*),
tree_node*)
../../gcc/gcc/gimplify-me.c:78
0x95a47f force_gimple_operand_gsi_1(gimple_stmt_iterator*, tree_node*, bool
(*)(tree_node*), tree_node*, bool, gsi_iterator_update)
../../gcc/gcc/gimplify-me.c:115
0xa5a757 expand_task_call
../../gcc/gcc/omp-low.c:6865
0xa5a757 expand_omp_taskreg
../../gcc/gcc/omp-low.c:7423
0xa6103f expand_omp
../../gcc/gcc/omp-low.c:13799
0xa637ad execute_expand_omp
../../gcc/gcc/omp-low.c:14028
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.
make: *** [a] Error 1
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Subject: [Bug middle-end/70843] [7 Regression] ICE in add_expr, at tree.c:7913
Date: Thu, 28 Apr 2016 22:23:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Apr 28 22:23:01 2016
New Revision: 235615
URL: https://gcc.gnu.org/viewcvs?rev=235615&root=gcc&view=rev
Log:
PR middle-end/70843
* fold-const.c (operand_equal_p): Don't verify hash value equality
if arg0 == arg1.
* tree.c (inchash::add_expr): Handle STATEMENT_LIST. Ignore BLOCK
and OMP_CLAUSE.
* gcc.dg/pr70843.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr70843.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree.c
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Thu, 28 Apr 2016 22:28:00 -0000
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--- Comment #6 from ryan.burn at gmail dot com ---
There's also some issues with cilk features and precompiled headers. I put in
70865 to track.
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Subject: [Bug middle-end/70843] [7 Regression] ICE in add_expr, at tree.c:7913
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c++/63142] gcc-cilk can not spawn a function template
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ryan.burn at gmail dot com changed:
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--- Comment #2 from ryan.burn at gmail dot com ---
I checked and this looks like it compiles fine with gcc7.
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Subject: [Bug java/70839] [5/6/7 regression] Every libjava execution test FAILs: Incorrect library ABI version detected
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--- Comment #9 from jonwilliams0000 at gmail dot com ---
unsubscribe
On Thu, Apr 28, 2016 at 10:37 AM, doko at gcc dot gnu.org <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70839
>
> --- Comment #7 from Matthias Klose <doko at gcc dot gnu.org> ---
> Author: doko
> Date: Thu Apr 28 16:37:27 2016
> New Revision: 235582
>
> URL: https://gcc.gnu.org/viewcvs?rev=235582&root=gcc&view=rev
> Log:
> 2016-04-28 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
>
> PR java/70839
> * decl.c (parse_version): Remove minor handling.
>
> Modified:
> branches/gcc-5-branch/gcc/java/ChangeLog
> branches/gcc-5-branch/gcc/java/decl.c
>From gcc-bugs-return-523674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 00:42:24 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/68120] can't easily deal with integer overflow at compile time
Date: Fri, 29 Apr 2016 00:42:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Testing a patch for this bug as well as bug 70507.
>From gcc-bugs-return-523675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 01:02:51 2016
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Subject: [Bug rtl-optimization/70826] [7 regression] many test cases fail starting with r235442
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amodra at gmail dot com
--- Comment #8 from Alan Modra <amodra at gmail dot com> ---
cr2, cr3 and cr4 are supposed to be non-volatile, ie. callee saved. INIT_REGS
initialises cr2,3,4 to particular values, that are checked later.
>From gcc-bugs-return-523676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 01:41:27 2016
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Subject: [Bug rtl-optimization/70826] [7 regression] many test cases fail starting with r235442
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-29
Assignee|unassigned at gcc dot gnu.org |amodra at gmail dot com
Ever confirmed|0 |1
--- Comment #9 from Alan Modra <amodra at gmail dot com> ---
It looks like a testcase bug. -frename-regs happens to make main() use cr2,
and there doesn't seem to be anything to prevent that.
>From gcc-bugs-return-523677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 03:34:33 2016
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Subject: [Bug middle-end/70831] [6/7 Regression] FTBFS: Build fails with bootstrap-lto and profiledbootstrap
Date: Fri, 29 Apr 2016 03:34:00 -0000
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--- Comment #3 from Jeff Bai <jeffbai at aosc dot xyz> ---
(In reply to Richard Biener from comment #2)
> You'll eventually run into PR60277 as well. Probably requires
> --enable-checking=release to trigger.
I do apologize for my limited knowledge, but what is the relevance in this
report with that?
>From gcc-bugs-return-523678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 04:15:14 2016
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Subject: [Bug target/70063] msp430 stack corruption for naked functions
Date: Fri, 29 Apr 2016 04:15:00 -0000
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--- Comment #3 from Andrew Wygle <awygle at gmail dot com> ---
This appears to be fixed in GCC 6.1
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From: "amodra at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70866] New: powerpc64le -ffixed-cr2 -ffixed-cr3 -ffixed-cr4 ICE
Date: Fri, 29 Apr 2016 05:01:00 -0000
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Bug ID: 70866
Summary: powerpc64le -ffixed-cr2 -ffixed-cr3 -ffixed-cr4 ICE
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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/* { dg-do compile } */
/* { dg-options "-ffixed-cr2 -ffixed-cr3 -ffixed-cr4" } */
#define SET_CR(R,V) __asm__ __volatile__ ("mtcrf %0,%1" : : "n" (1<<(7-R)), "r"
(V<<(4*(7-R))) : "cr" #R)
void foo (void)
{
SET_CR (2, 7);
SET_CR (3, 8);
SET_CR (4, 9);
}
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Subject: [Bug target/70866] powerpc64le -ffixed-cr2 -ffixed-cr3 -ffixed-cr4 ICE
Date: Fri, 29 Apr 2016 05:02:00 -0000
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |powerpc64le
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-29
Assignee|unassigned at gcc dot gnu.org |amodra at gmail dot com
Ever confirmed|0 |1
>From gcc-bugs-return-523681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 05:42:11 2016
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Subject: [Bug c++/47226] [C++0x] GCC doesn't expand template parameter pack that appears in a lambda-expression
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Tatsuyuki Ishi <ishitatsuyuki at gmail dot com> changed:
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CC| |ishitatsuyuki at gmail dot com
--- Comment #7 from Tatsuyuki Ishi <ishitatsuyuki at gmail dot com> ---
I'm suffering from this bug too. It currently break my CI since I can't use
clang too due to ABI changes.
This is 3 years-old: I hope someone will take a look on it.
>From gcc-bugs-return-523682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 05:49:12 2016
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Subject: [Bug ada/70867] New: access discriminant in return aggregate detected as dangling if set from an implicit dereference in generic package
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70867
Bug ID: 70867
Summary: access discriminant in return aggregate detected as
dangling if set from an implicit dereference in
generic package
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: nicolas.boulenguez at free dot fr
Target Milestone: ---
Hello.
With GCC-6 (Debian 6.0.1-2) 6.0.1 20160423 (prerelease),
compiling the following package with "gcc-6 -c p.adb" fails:
p.adb:4:20: access discriminant in return aggregate would be a dangling
reference
The code compiles
- if the "generic" line is removed
- or if ".all" is inserted between "Position" and ".Item'Access"
I am not sure whether returning this reference is allowed by the Ada Reference
Manual,
but the semantics of "generic" and ".all" should certainly not affect the
answer.
-- Content of p.ads.
generic
package P is
type T (D : access Integer) is null record;
type R is record
Item : aliased Integer;
end record;
function F (Position : access R) return T;
end P;
-- Content of p.adb.
package body P is
function F (Position : access R) return T is
begin
return (D => Position.Item'Access);
end F;
end P;
>From gcc-bugs-return-523683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 06:01:52 2016
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From: "sthalik at misaki dot pl" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/66488] segfault on sizeof(long) < sizeof(void*) and large GCC memory usage
Date: Fri, 29 Apr 2016 06:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66488
--- Comment #9 from Stanisław Halik <sthalik at misaki dot pl> ---
I'm sorry to be bumping this issue but it's been months.
cheers,
sh
>From gcc-bugs-return-523684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 06:35:26 2016
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From: "sethml at ofb dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70868] New: Assigning constructed temporary of class with nontrivial constructor uses unnecessary temporary
Date: Fri, 29 Apr 2016 06:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70868
Bug ID: 70868
Summary: Assigning constructed temporary of class with
nontrivial constructor uses unnecessary temporary
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: sethml at ofb dot net
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It's a common C++ idiom to clear a struct by assigning a default-constructed
instance to it:
struct Foo1 {
int x;
int array[2000];
} foo1;
void clearFoo1() {
foo1 = Foo1();
}
When compiled with -O2, this produces efficient assembly equivalent to
"memset(&foo1, 0, sizeof(foo1))". However, throw in a nontrivial constructor
via C++11 assignment initialization:
struct Foo2 {
int x = 0;
int array[2000];
} foo2;
void clearFoo2() {
foo2 = Foo2();
}
While compiled with -cstd=c++11 -O2, the resulting assembly allocates a
temporary on the stack and copies it, equivalent to:
void clearFoo2() {
char temp[sizeof(foo2)];
memset(temp, 0, sizeof(foo2));
memcpy(foo2, temp, sizeof(foo2));
}
Besides being inefficient, the resulting code uses far more stack than
expected. In my case, my embedded firmware was crashing due to stack
exhaustion!
Here's a godbolt link with the code above: https://godbolt.org/g/QYLq9L
The resulting x86-64 assembly is:
clearFoo1():
movl $foo1, %edi
movl $1000, %ecx
xorl %eax, %eax
rep stosq
movl $0, (%rdi)
ret
clearFoo2():
subq $7904, %rsp
xorl %eax, %eax
movl $1000, %ecx
leaq -120(%rsp), %rdi
leaq -120(%rsp), %rsi
rep stosq
movl $1000, %ecx
movl $0, (%rdi)
movl $foo2, %edi
rep movsq
movl %eax, (%rdi)
addq $7904, %rsp
ret
The result is the same with a variety of similar idioms:
foo2 = Foo2();
foo2 = Foo2{};
foo2 = {};
The problem appears to have been in all old versions of gcc I've tested, up to
6.1.0. I haven't tested head. Clang >= 3.7 produces efficient code. Clang <=
3.6 produces a temporary and copy for both cases (clearFoo1 and clearFoo2).
In my codebase, assigning a default-constructed object is a common way to clear
a struct. Using memset() directly, besides being ugly, would fail to set
nontrivial members and members with non-zero default values correctly. The best
workaround I've found is to use placement new:
void clearFoo2PlacementNew() {
foo2.~Foo2();
new (&foo2) Foo2();
}
Ugh.
>From gcc-bugs-return-523685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 06:42:42 2016
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From: "demoonlit at panathenaia dot halfmoon.jp" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/70867] access discriminant in return aggregate detected as dangling if set from an implicit dereference in generic package
Date: Fri, 29 Apr 2016 06:42:00 -0000
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yuta tomino <demoonlit at panathenaia dot halfmoon.jp> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |demoonlit at panathenaia dot halfm
| |oon.jp
--- Comment #1 from yuta tomino <demoonlit at panathenaia dot halfmoon.jp> ---
Hello. I have encountered a similar case, too.
package p is
type T (D : access constant Integer) is null record;
type R is limited record
Component : aliased Integer;
end record;
function F (Object : R) return T is
(D => Object.Component'Access);
end p;
p.ads:7:12: access discriminant in return aggregate would be a dangling
reference
Inserting "aliased" between "Object :" and "R" resolves it.
However, "Object : R" is already passed by reference without aliased, because
in RM 6.2(7/3), an explicitly limited record type is a by-reference type unless
aliased.
So, it does not make a dangling reference.
>From gcc-bugs-return-523686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 07:07:36 2016
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Subject: [Bug ada/70867] [6 regression] access discriminant in return aggregate wrongly detected as dangling
Date: Fri, 29 Apr 2016 07:07:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-29
CC| |ebotcazou at gcc dot gnu.org
Target Milestone|--- |6.2
Summary|access discriminant in |[6 regression] access
|return aggregate detected |discriminant in return
|as dangling if set from an |aggregate wrongly detected
|implicit dereference in |as dangling
|generic package |
Ever confirmed|0 |1
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Confirmed, the implementation of the new check overlooks several cases.
>From gcc-bugs-return-523687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 07:26:04 2016
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From: "thomas.helfer at cea dot fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70869] New: internal compiler error: Segmentation fault on array of pointer to function members
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70869
Bug ID: 70869
Summary: internal compiler error: Segmentation fault on array
of pointer to function members
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 38373
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38373&action=edit
test file reproducing the bug
Hi,
The bug seems new in gcc 6.1. It happens when parsing expression such as:
for(const auto& m: {&A::f,&A::f2}){
See the test in attachment which works with previous versions (4.7, 4.9, 5.1,
5.2).
This is the output of gcc on my Linux (Debian jessie) box:
g++ -v -save-temps test.cxx -o test
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/media/th202608/0ed06489-8de7-451c-9cf5-7c6d11bec927/codes/gcc/6.1.0/install/libexec/gcc/x86_64-pc-linux-gnu/6.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-6.1.0/configure
--prefix=/media/th202608/0ed06489-8de7-451c-9cf5-7c6d11bec927/codes/gcc/6.1.0/install
Thread model: posix
gcc version 6.1.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-o' 'test' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/media/th202608/0ed06489-8de7-451c-9cf5-7c6d11bec927/codes/gcc/6.1.0/install/libexec/gcc/x86_64-pc-linux-gnu/6.1.0/cc1plus
-E -quiet -v -imultiarch x86_64-linux-gnu -D_GNU_SOURCE test.cxx -mtune=generic
-march=x86-64 -fpch-preprocess -o test.ii
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/media/th202608/0ed06489-8de7-451c-9cf5-7c6d11bec927/codes/gcc/6.1.0/install/lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/media/th202608/0ed06489-8de7-451c-9cf5-7c6d11bec927/codes/gcc/6.1.0/install/lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0
/media/th202608/0ed06489-8de7-451c-9cf5-7c6d11bec927/codes/gcc/6.1.0/install/lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/x86_64-pc-linux-gnu
/media/th202608/0ed06489-8de7-451c-9cf5-7c6d11bec927/codes/gcc/6.1.0/install/lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/backward
/media/th202608/0ed06489-8de7-451c-9cf5-7c6d11bec927/codes/gcc/6.1.0/install/lib/gcc/x86_64-pc-linux-gnu/6.1.0/include
/usr/local/include
/media/th202608/0ed06489-8de7-451c-9cf5-7c6d11bec927/codes/gcc/6.1.0/install/include
/media/th202608/0ed06489-8de7-451c-9cf5-7c6d11bec927/codes/gcc/6.1.0/install/lib/gcc/x86_64-pc-linux-gnu/6.1.0/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-o' 'test' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/media/th202608/0ed06489-8de7-451c-9cf5-7c6d11bec927/codes/gcc/6.1.0/install/libexec/gcc/x86_64-pc-linux-gnu/6.1.0/cc1plus
-fpreprocessed test.ii -quiet -dumpbase test.cxx -mtune=generic -march=x86-64
-auxbase test -version -o test.s
GNU C++14 (GCC) version 6.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 6.1.0, 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++14 (GCC) version 6.1.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 6.1.0, 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: 33ec74a6d567f8d1443e643e24e39f72
g++: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
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Subject: [Bug c++/70869] internal compiler error: Segmentation fault on array of pointer to function members
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--- Comment #1 from Helfer Thomas <thomas.helfer at cea dot fr> ---
Created attachment 38374
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The generated .ii file
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
Date: Fri, 29 Apr 2016 07:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70869
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-29
CC| |trippels at gcc dot gnu.org
Known to work| |5.3.1
Summary|internal compiler error: |[6/7 Regression] internal
|Segmentation fault on array |compiler error:
|of pointer to function |Segmentation fault on array
|members |of pointer to function
| |members
Ever confirmed|0 |1
Known to fail| |6.1.0, 7.0
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
It is a stackoverflow in gimplify_expr().
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
Date: Fri, 29 Apr 2016 07:34:00 -0000
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--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(gdb) bt
#0 gimplify_expr (expr_p=expr_p@entry=0x7ffffbfff148,
pre_p=pre_p@entry=0x7fffffffd7d0, post_p=0x0,
gimple_test_f=gimple_test_f@entry=0xada690
<is_gimple_reg_rhs_or_call(tree)>, fallback=fallback@entry=1) at
../../gcc/gcc/gimplify.c:10101
#1 0x0000000000ae46bd in internal_get_tmp_var (val=<optimized out>,
pre_p=0x7fffffffd7d0, post_p=<optimized out>, is_formal=<optimized out>) at
../../gcc/gcc/gimplify.c:557
#2 0x0000000000aead45 in gimplify_expr (expr_p=expr_p@entry=0x7ffff6594368,
pre_p=pre_p@entry=0x7fffffffd7d0, post_p=post_p@entry=0x7ffffbfff410,
gimple_test_f=<optimized out>,
fallback=fallback@entry=1) at ../../gcc/gcc/gimplify.c:11223
#3 0x0000000000afe7d3 in gimplify_modify_expr
(expr_p=expr_p@entry=0x7ffffbfff570, pre_p=pre_p@entry=0x7fffffffd7d0,
post_p=post_p@entry=0x7ffffbfff410,
want_value=<optimized out>) at ../../gcc/gcc/gimplify.c:4725
#4 0x0000000000aec56e in gimplify_expr (expr_p=0x7ffffbfff570,
pre_p=pre_p@entry=0x7fffffffd7d0, post_p=0x7ffffbfff410, post_p@entry=0x0,
gimple_test_f=gimple_test_f@entry=0xadd070 <is_gimple_stmt(tree)>,
fallback=fallback@entry=0) at ../../gcc/gcc/gimplify.c:10287
#5 0x0000000000af0197 in gimplify_stmt (stmt_p=stmt_p@entry=0x7ffffbfff570,
seq_p=seq_p@entry=0x7fffffffd7d0) at ../../gcc/gcc/gimplify.c:5688
#6 0x0000000000ae47e3 in gimplify_and_add (seq_p=0x7fffffffd7d0, t=<optimized
out>) at ../../gcc/gcc/gimplify.c:425
#7 internal_get_tmp_var (val=<optimized out>, pre_p=0x7fffffffd7d0,
post_p=<optimized out>, is_formal=<optimized out>) at
../../gcc/gcc/gimplify.c:570
#8 0x0000000000aead45 in gimplify_expr (expr_p=expr_p@entry=0x7ffff6594340,
pre_p=pre_p@entry=0x7fffffffd7d0, post_p=post_p@entry=0x7ffffbfff820,
gimple_test_f=<optimized out>,
fallback=fallback@entry=1) at ../../gcc/gcc/gimplify.c:11223
#9 0x0000000000afe7d3 in gimplify_modify_expr
(expr_p=expr_p@entry=0x7ffffbfff980, pre_p=pre_p@entry=0x7fffffffd7d0,
post_p=post_p@entry=0x7ffffbfff820,
want_value=<optimized out>) at ../../gcc/gcc/gimplify.c:4725
#10 0x0000000000aec56e in gimplify_expr (expr_p=0x7ffffbfff980,
pre_p=pre_p@entry=0x7fffffffd7d0, post_p=0x7ffffbfff820, post_p@entry=0x0,
gimple_test_f=gimple_test_f@entry=0xadd070 <is_gimple_stmt(tree)>,
fallback=fallback@entry=0) at ../../gcc/gcc/gimplify.c:10287
#11 0x0000000000af0197 in gimplify_stmt (stmt_p=stmt_p@entry=0x7ffffbfff980,
seq_p=seq_p@entry=0x7fffffffd7d0) at ../../gcc/gcc/gimplify.c:5688
#12 0x0000000000ae47e3 in gimplify_and_add (seq_p=0x7fffffffd7d0, t=<optimized
out>) at ../../gcc/gcc/gimplify.c:425
#13 internal_get_tmp_var (val=<optimized out>, pre_p=0x7fffffffd7d0,
post_p=<optimized out>, is_formal=<optimized out>) at
../../gcc/gcc/gimplify.c:570
#14 0x0000000000aead45 in gimplify_expr (expr_p=expr_p@entry=0x7ffff6594318,
pre_p=pre_p@entry=0x7fffffffd7d0, post_p=post_p@entry=0x7ffffbfffc30,
gimple_test_f=<optimized out>,
fallback=fallback@entry=1) at ../../gcc/gcc/gimplify.c:11223
#15 0x0000000000afe7d3 in gimplify_modify_expr
(expr_p=expr_p@entry=0x7ffffbfffd90, pre_p=pre_p@entry=0x7fffffffd7d0,
post_p=post_p@entry=0x7ffffbfffc30,
want_value=<optimized out>) at ../../gcc/gcc/gimplify.c:4725
...
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Started with r234940 aka PR70615 fix.
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Subject: [Bug middle-end/65686] [5/6/7 regression] inconsistent warning maybe-uninitialized: warn about 'unsigned', not warn about 'int'
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed for GCC 7.
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Subject: [Bug tree-optimization/13962] [tree-ssa] make "fold" use alias information to optimize pointer comparisons
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
For GCC 7 we can now do ptr != decl (for certain kinds of decls). I have
patches extending this to the ptr != ptr case but they need work because PTA
needs to handle points-to NULL (aka nothing) and STRING_CST (and LABEL_DECL
and FUNCTION_DECL, etc.) conservatively. Comparing LABEL_DECL against
FUNCTION_DECL will also be interesting, so not sure if we can ever make
this work (maybe glob LABEL_DECLs with their containing FUNCTION_DECLs for
PTA purposes).
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--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Apr 29 08:36:49 2016
New Revision: 235622
URL: https://gcc.gnu.org/viewcvs?rev=235622&root=gcc&view=rev
Log:
2016-04-29 Richard Biener <rguenther@suse.de>
PR tree-optimization/13962
PR tree-optimization/65686
* tree-ssa-alias.h (ptrs_compare_unequal): Declare.
* tree-ssa-alias.c (ptrs_compare_unequal): New function
using PTA to compare pointers.
* match.pd: Add pattern for pointer equality compare simplification
using ptrs_compare_unequal.
* gcc.dg/uninit-pr65686.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/uninit-pr65686.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-alias.c
trunk/gcc/tree-ssa-alias.h
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Subject: [Bug tree-optimization/13962] [tree-ssa] make "fold" use alias information to optimize pointer comparisons
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Apr 29 08:36:49 2016
New Revision: 235622
URL: https://gcc.gnu.org/viewcvs?rev=235622&root=gcc&view=rev
Log:
2016-04-29 Richard Biener <rguenther@suse.de>
PR tree-optimization/13962
PR tree-optimization/65686
* tree-ssa-alias.h (ptrs_compare_unequal): Declare.
* tree-ssa-alias.c (ptrs_compare_unequal): New function
using PTA to compare pointers.
* match.pd: Add pattern for pointer equality compare simplification
using ptrs_compare_unequal.
* gcc.dg/uninit-pr65686.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/uninit-pr65686.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-alias.c
trunk/gcc/tree-ssa-alias.h
>From gcc-bugs-return-523696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 08:40:12 2016
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Subject: [Bug fortran/70870] New: Segmentation violation in gfc_assign_data_value
Date: Fri, 29 Apr 2016 08:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70870
Bug ID: 70870
Summary: Segmentation violation in gfc_assign_data_value
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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! gfortran 6.1.0 Segmentation fault in gfc_assign_data_value
type t
integer :: g=0 ! default initialization
end type
type(t) :: v2
data v2/t(2)/ ! this is wrong
end
!f951: internal compiler error: Segmentation fault
!0xa6532f crash_signal
! ../../gcc-6.1.0/gcc/toplev.c:333
!0x5de1fc gfc_assign_data_value(gfc_expr*, gfc_expr*, __mpz_struct*,
!__mpz_struct (*) [1])
! ../../gcc-6.1.0/gcc/fortran/data.c:500
!0x651762 check_data_variable
! ../../gcc-6.1.0/gcc/fortran/resolve.c:14564
!0x651762 traverse_data_var
! ../../gcc-6.1.0/gcc/fortran/resolve.c:14693
!0x65be91 resolve_data
! ../../gcc-6.1.0/gcc/fortran/resolve.c:14748
!0x65be91 resolve_types
! ../../gcc-6.1.0/gcc/fortran/resolve.c:15501
!0x6576bf gfc_resolve(gfc_namespace*)
! ../../gcc-6.1.0/gcc/fortran/resolve.c:15586
!0x642eda resolve_all_program_units
! ../../gcc-6.1.0/gcc/fortran/parse.c:5552
!0x642eda gfc_parse_file()
! ../../gcc-6.1.0/gcc/fortran/parse.c:5804
!0x684135 gfc_be_parse_file
! ../../gcc-6.1.0/gcc/fortran/f95-lang.c:201
!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.
>From gcc-bugs-return-523697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 08:46:02 2016
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Subject: [Bug c++/61636] generic lambda "cannot call member function without object"
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Tatsuyuki Ishi <ishitatsuyuki at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ishitatsuyuki at gmail dot com
--- Comment #16 from Tatsuyuki Ishi <ishitatsuyuki at gmail dot com> ---
This is really annoying. Is the patch going to fix it or nothing has been done?
>From gcc-bugs-return-523698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 08:49:11 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
Date: Fri, 29 Apr 2016 08:49:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-523699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 08:50:26 2016
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Subject: [Bug tree-optimization/70861] Improve code generation of switch tables
Date: Fri, 29 Apr 2016 08:50:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-29
Component|middle-end |tree-optimization
Ever confirmed|0 |1
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-523700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 08:56:41 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug hsa/70857] [6/7 Regression] ICE with -fopenmp -fopenacc in insert_vi_for_tree, at tree-ssa-structalias.c:2813
Date: Fri, 29 Apr 2016 08:56:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jamborm at gcc dot gnu.org
Component|fortran |hsa
Target Milestone|--- |6.2
Summary|[6 Regression] ICE with |[6/7 Regression] ICE with
|-fopenmp -fopenacc in |-fopenmp -fopenacc in
|insert_vi_for_tree, at |insert_vi_for_tree, at
|tree-ssa-structalias.c:2813 |tree-ssa-structalias.c:2813
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Not really a regression since HSA support is new in GCC 6.
>From gcc-bugs-return-523701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 08:57:38 2016
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From: "vogt at linux dot vnet.ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/68860] [6/7 regression] FAIL: gcc.dg/guality/pr36728-1.c -flto -O3 -g line 16/7 arg1 == 1
Date: Fri, 29 Apr 2016 08:57:00 -0000
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--- Comment #13 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
By the way, I think the value of y should be tested *after* the asm statement
in line 17 not before it in line 16. At higher optimization levels the
assignement may not have happened yet when gdb reaches line 16. (And x should
be tested in line 19 for the same reason).
>From gcc-bugs-return-523702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 08:59:56 2016
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From: "bernds at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/60040] AVR: error: unable to find a register to spill in class 'POINTER_REGS'
Date: Fri, 29 Apr 2016 08:59:00 -0000
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--- Comment #12 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Author: bernds
Date: Fri Apr 29 08:59:09 2016
New Revision: 235625
URL: https://gcc.gnu.org/viewcvs?rev=235625&root=gcc&view=rev
Log:
avr-related reload fix from Senthil Kumar Selvaraj
PR target/60040
* reload1.c (reload): Call finish_spills before
restarting reload loop. Skip select_reload_regs
if update_eliminables_and_spill returns true.
testsuite/
PR target/60040
* gcc.target/avr/pr60040-1.c: New.
* gcc.target/avr/pr60040-2.c: New.
Added:
trunk/gcc/testsuite/gcc.target/avr/pr60040-1.c
trunk/gcc/testsuite/gcc.target/avr/pr60040-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/reload1.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-523703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 09:07:38 2016
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From: "jan.smets@alcatel-lucent.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70871] New: questionable optimisation in fold-const.c
Date: Fri, 29 Apr 2016 09:07:00 -0000
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Bug ID: 70871
Summary: questionable optimisation in fold-const.c
Product: gcc
Version: 5.3.1
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typedef struct X
{
void *a;
long int b;
int c;
int d;
unsigned int e[3];
unsigned short f;
unsigned char g;
unsigned char h;
unsigned char i;
unsigned char j;
unsigned char k;
unsigned char l;
unsigned char m;
unsigned char n;
};
int somefunc(void)
{
struct X *pX = (0L);
extern void call(void*);
call(&pX);
if(!pX->n && !pX->l)
return 0;
return 1;
}
for -O1 and higher
if(!pX->n && !pX->l)
results in (tree-original)
if ((BIT_FIELD_REF <*pX, 64, 320> & 280379743272960) == 0)
which eventually results in
ASAN_CHECK (6, _1, 8, 8)
when using -fsantize=address
Wheras ASAN really should be reporting a 2x 1 byte load and not 1x 8.
Thanks
>From gcc-bugs-return-523704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 09:32:22 2016
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Subject: [Bug middle-end/70871] questionable optimisation in fold-const.c
Date: Fri, 29 Apr 2016 09:32:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-29
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Assembler w/o asan:
somefunc:
.LFB0:
.cfi_startproc
subq $24, %rsp
.cfi_def_cfa_offset 32
movq $0, 8(%rsp)
leaq 8(%rsp), %rdi
call call
movabsq $280379743272960, %rdx
movq 8(%rsp), %rax
testq %rdx, 40(%rax)
setne %al
movzbl %al, %eax
addq $24, %rsp
.cfi_def_cfa_offset 8
ret
if my math is correct this loads 8 bytes from &px->i and accesses two stray
bytes after the object. That's actually fine as alignment guarantees of
the type ensure this won't cross a page boundary. If we misalign it by
making it packed the folding doesn't apply.
So while the folding is strange it isn't incorrect but it messes with ASAN.
>From gcc-bugs-return-523705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 09:33:20 2016
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Subject: [Bug fortran/70855] [6/7 Regression] ICE with -fopenmp in gfc_trans_omp_workshare(): Bad statement code
Date: Fri, 29 Apr 2016 09:33:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.2
Summary|[6 Regression] ICE with |[6/7 Regression] ICE with
|-fopenmp in |-fopenmp in
|gfc_trans_omp_workshare(): |gfc_trans_omp_workshare():
|Bad statement code |Bad statement code
>From gcc-bugs-return-523706-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 09:35:34 2016
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Subject: [Bug fortran/70856] [6/7 Regression] ICE with -fopenacc in get_constraint_for_ssa_var, at tree-ssa-structalias.c:2952
Date: Fri, 29 Apr 2016 09:35:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |openacc
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-29
Target Milestone|--- |6.2
Summary|[6 Regression] ICE with |[6/7 Regression] ICE with
|-fopenacc in |-fopenacc in
|get_constraint_for_ssa_var, |get_constraint_for_ssa_var,
|at |at
|tree-ssa-structalias.c:2952 |tree-ssa-structalias.c:2952
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-523707-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 09:37:05 2016
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Subject: [Bug fortran/70856] [6/7 Regression] ICE with -fopenacc in get_constraint_for_ssa_var, at tree-ssa-structalias.c:2952
Date: Fri, 29 Apr 2016 09:37:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks like OACC generates aliases the "wrong way around"
>From gcc-bugs-return-523708-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 09:50:50 2016
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Subject: [Bug c++/70872] New: c++ regression malloc not found c++ 5.3.0 compiles fine
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Bug ID: 70872
Summary: c++ regression malloc not found c++ 5.3.0 compiles
fine
Product: gcc
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Priority: P3
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c++ fails to compile some mozilla firefox version 42 cc files
c++ 5.3.0 compiles fine
firefox configured with
../configure --disable-gconf
then run
make
As in:
c++ -o Unified_cpp_src_common_linux0.o -c -I../../../../../../dist/stl_wrappers
-I../../../../../../dist/system_wrappers -include
/home/vitti/1tb/vitti/rpmbuild/SOURCES/firefox-42.0/config/gcc_hidden.h
-DNO_STABS_SUPPORT -DSTATIC_EXPORTABLE_JS_API -DMOZILLA_INTERNAL_API
-DIMPL_LIBXUL -DAB_CD=en-US -DNO_NSPR_10_SUPPORT
-I/home/vitti/1tb/vitti/rpmbuild/SOURCES/firefox-42.0/toolkit/crashreporter/google-breakpad/src/common/linux
-I.
-I/home/vitti/1tb/vitti/rpmbuild/SOURCES/firefox-42.0/toolkit/crashreporter/google-breakpad/src
-I../../../../../../dist/include
-I/home/vitti/rpmbuild/SOURCES/firefox-42.0/firefox-obj/dist/include/nspr
-I/home/vitti/rpmbuild/SOURCES/firefox-42.0/firefox-obj/dist/include/nss
-fPIC -DMOZILLA_CLIENT -include ../../../../../../mozilla-config.h -MD -MP
-MF .deps/Unified_cpp_src_common_linux0.o.pp -Wall -Wempty-body
-Woverloaded-virtual -Wsign-compare -Wwrite-strings -Wno-invalid-offsetof
-Wcast-align -fno-exceptions -fno-strict-aliasing -fno-rtti -fno-exceptions
-fno-math-errno -std=gnu++0x -pthread -pipe -DNDEBUG -DTRIMMED -g
-freorder-blocks -Os -fomit-frame-pointer
/home/vitti/1tb/vitti/rpmbuild/SOURCES/firefox-42.0/firefox-obj/toolkit/crashreporter/google-breakpad/src/common/linux/Unified_cpp_src_common_linux0.cpp
In file included from ../../../../../../dist/stl_wrappers/cstdlib:34:0,
from
/home/vitti/1tb/vitti/local/gcc-6.1.0/include/c++/6.1.0/stdlib.h:36,
from ../../../../../../dist/system_wrappers/stdlib.h:3,
from
/home/vitti/1tb/vitti/rpmbuild/SOURCES/firefox-42.0/toolkit/crashreporter/google-breakpad/src/common/linux/guid_creator.cc:35,
from
/home/vitti/1tb/vitti/rpmbuild/SOURCES/firefox-42.0/firefox-obj/toolkit/crashreporter/google-breakpad/src/common/linux/Unified_cpp_src_common_linux0.cpp:11:
../../../../../../dist/include/mozilla/mozalloc.h: In function ‘void* operator
new(size_t, const std::nothrow_t&)’:
../../../../../../dist/include/mozilla/mozalloc.h:192:28: error: ‘malloc’ was
not declared in this scope
return malloc_impl(size);
^
../../../../../../dist/include/mozilla/mozalloc.h: In function ‘void* operator
new [](size_t, const std::nothrow_t&)’:
../../../../../../dist/include/mozilla/mozalloc.h:204:28: error: ‘malloc’ was
not declared in this scope
return malloc_impl(size);
^
../../../../../../dist/include/mozilla/mozalloc.h: In function ‘void operator
delete(void*)’:
../../../../../../dist/include/mozilla/mozalloc.h:210:25: error: ‘free’ was not
declared in this scope
return free_impl(ptr);
^
../../../../../../dist/include/mozilla/mozalloc.h:210:25: error:
return-statement with a value, in function returning 'void' [-fpermissive]
../../../../../../dist/include/mozilla/mozalloc.h: In function ‘void operator
delete(void*, const std::nothrow_t&)’:
../../../../../../dist/include/mozilla/mozalloc.h:216:25: error: ‘free’ was not
declared in this scope
return free_impl(ptr);
^
../../../../../../dist/include/mozilla/mozalloc.h:216:25: error:
return-statement with a value, in function returning 'void' [-fpermissive]
../../../../../../dist/include/mozilla/mozalloc.h: In function ‘void operator
delete [](void*)’:
../../../../../../dist/include/mozilla/mozalloc.h:222:25: error: ‘free’ was not
declared in this scope
return free_impl(ptr);
^
../../../../../../dist/include/mozilla/mozalloc.h:222:25: error:
return-statement with a value, in function returning 'void' [-fpermissive]
../../../../../../dist/include/mozilla/mozalloc.h: In function ‘void operator
delete [](void*, const std::nothrow_t&)’:
../../../../../../dist/include/mozilla/mozalloc.h:228:25: error: ‘free’ was not
declared in this scope
return free_impl(ptr);
^
../../../../../../dist/include/mozilla/mozalloc.h:228:25: error:
return-statement with a value, in function returning 'void' [-fpermissive]
../../../../../../dist/include/mozilla/mozalloc.h: In function ‘void* operator
new(size_t, const mozilla::fallible_t&)’:
../../../../../../dist/include/mozilla/mozalloc.h:254:28: error: ‘malloc’ was
not declared in this scope
return malloc_impl(size);
^
../../../../../../dist/include/mozilla/mozalloc.h: In function ‘void* operator
new [](size_t, const mozilla::fallible_t&)’:
../../../../../../dist/include/mozilla/mozalloc.h:260:28: error: ‘malloc’ was
not declared in this scope
return malloc_impl(size);
^
../../../../../../dist/include/mozilla/mozalloc.h: In function ‘void operator
delete(void*, const mozilla::fallible_t&)’:
../../../../../../dist/include/mozilla/mozalloc.h:266:18: error: ‘free’ was not
declared in this scope
free_impl(ptr);
^
../../../../../../dist/include/mozilla/mozalloc.h: In function ‘void operator
delete [](void*, const mozilla::fallible_t&)’:
../../../../../../dist/include/mozilla/mozalloc.h:272:18: error: ‘free’ was not
declared in this scope
free_impl(ptr);
^
../../../../../../dist/include/mozilla/mozalloc.h: In member function ‘void
InfallibleAllocPolicy::free_(void*)’:
../../../../../../dist/include/mozilla/mozalloc.h:310:23: error: ‘free’ was not
declared in this scope
free_impl(aPtr);
^
>From gcc-bugs-return-523709-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 09:58:05 2016
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Subject: [Bug libstdc++/70722] include_next in cmath skips user-defined wrapper
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zeccav at gmail dot com
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
*** Bug 70872 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523710-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 09:58:05 2016
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70872] c++ regression malloc not found c++ 5.3.0 compiles fine
Date: Fri, 29 Apr 2016 09:58:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |trippels at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 70722 ***
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Subject: [Bug fortran/70870] Segmentation violation in gfc_assign_data_value
Date: Fri, 29 Apr 2016 10:22:00 -0000
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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> ---
Confirmed from 4.8 up to trunk (7.0).
>From gcc-bugs-return-523712-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 10:25:31 2016
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Subject: [Bug fortran/70855] [6/7 Regression] ICE with -fopenmp in gfc_trans_omp_workshare(): Bad statement code
Date: Fri, 29 Apr 2016 10:25:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed. The ICE appeared around revision r222875 (too many patches at that
time for a more accurate bisection).
>From gcc-bugs-return-523713-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 10:35:27 2016
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Subject: [Bug fortran/70863] Finalization of array of derived type causes segfault
Date: Fri, 29 Apr 2016 10:35:00 -0000
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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> ---
Confirmed from 4.9 up to trunk (7.0), finalization not implemented in 4.8,
related to/duplicate of pr69298?
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37336
[Bug 37336] [F03] Finish derived-type finalization
>From gcc-bugs-return-523714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 10:41:50 2016
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From: "ysrumyan at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70873] New: [GCC7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Fri, 29 Apr 2016 10:41:00 -0000
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Bug ID: 70873
Summary: [GCC7 Regressio] 20% performance regression at
482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Product: gcc
Version: 7.0
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Reporter: ysrumyan at gmail dot com
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This degradation is caused by known issue with partial register dependency:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57954
and can be reproduced with the attached simple test-case:
before fix
vxorpd %xmm4, %xmm4, %xmm4
vcvtss2sd (%esi,%eax,4), %xmm4, %xmm4
after fix
vxorpd %xmm6, %xmm6, %xmm6
vcvtss2sd (%esi,%eax,4), %xmm6, %xmm7
I assume that register renaming must not split such register live range but
simply consider it as one.
>From gcc-bugs-return-523715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 10:43:20 2016
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Subject: [Bug rtl-optimization/70873] [GCC7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
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--- Comment #1 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Created attachment 38375
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38375&action=edit
test-case to reproduce
Must be compiled with -O2 -mavx2 -m32 options.
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Subject: [Bug fortran/70864] internal compiler error: in gfc_get_symbol_decl, at fortran/trans-decl.c:1403
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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> ---
Confirmed from 4.8 up to trunk (7.0). The test gives the ICE at the same place
as the test in pr68846 variant 2.
>From gcc-bugs-return-523717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 11:21:43 2016
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From: "jan.smets@alcatel-lucent.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/70871] questionable optimisation in fold-const.c
Date: Fri, 29 Apr 2016 11:21:00 -0000
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--- Comment #2 from Jan Smets <jan.smets@alcatel-lucent.com> ---
Created attachment 38376
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38376&action=edit
possible solution
I have not extensively tested this, but it seems to work for my testcase.
>From gcc-bugs-return-523718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 11:24:57 2016
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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/70729] Loop marked with omp simd pragma is not vectorized
Date: Fri, 29 Apr 2016 11:24:00 -0000
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Yuri Rumyantsev from comment #12)
> Created attachment 38367 [details]
> modified patch
The loop->aux flagging looks redundant to me. Why is ->safelen only valid
before vectorization? I suppose we're lucky that no pass before vectorization
applies any unrolling (like predictive commoning for example) as such pass
must adjust ->safelen accordingly. But as LIM only cares for safelen > 0
_this_ property shouldn't change, not even by vectorization, no?
That said, if vectorization makes ->safelen invalid then the vectorizer
should adjust ->safelen properly (like any other passes invalidating it).
I suppose most of the testsuite fallout you see is from the pass re-ordering
(I didn't bootstrap/test that yet). The fails need to be investigated,
but let's handle the pass-reordering separately and converge on a way
to use ->safelen from LIM first.
>From gcc-bugs-return-523719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 11:31:03 2016
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From: "ienkovich at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
Date: Fri, 29 Apr 2016 11:31:00 -0000
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--- Comment #14 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #13)
> (In reply to Yuri Rumyantsev from comment #12)
> > Created attachment 38367 [details]
> > modified patch
>
> The loop->aux flagging looks redundant to me. Why is ->safelen only valid
> before vectorization? I suppose we're lucky that no pass before
> vectorization
> applies any unrolling (like predictive commoning for example) as such pass
> must adjust ->safelen accordingly. But as LIM only cares for safelen > 0
> _this_ property shouldn't change, not even by vectorization, no?
>
SIMD lane access is not invariant before vectorization but is invariant after
vectorization. This means when GOMP_SIMD_LANE calls are removed we can't use
safelen for invariant moves anymore.
>From gcc-bugs-return-523720-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 11:32:38 2016
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Subject: [Bug tree-optimization/70526] [5 Regression] GCC 6 miscompiles Firefox JIT compiler
Date: Fri, 29 Apr 2016 11:32:00 -0000
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--- Comment #10 from Jan de Mooij <jandemooij+gccbugs at gmail dot com> ---
Richards, thank you for fixing that.
Unfortunately Firefox still crashes and my original test case (see comment 0
and the attachment) still fails. Do you have any idea why?
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Subject: [Bug tree-optimization/70526] [5 Regression] GCC 6 miscompiles Firefox JIT compiler
Date: Fri, 29 Apr 2016 11:38:00 -0000
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--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jan de Mooij from comment #10)
> Richards, thank you for fixing that.
>
> Unfortunately Firefox still crashes and my original test case (see comment 0
> and the attachment) still fails. Do you have any idea why?
The patch has not yet been backported to GCC 5.
>From gcc-bugs-return-523722-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 11:42:05 2016
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70729] Loop marked with omp simd pragma is not vectorized
Date: Fri, 29 Apr 2016 11:42:00 -0000
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--- Comment #15 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 29 Apr 2016, ienkovich at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70729
>
> --- Comment #14 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #13)
> > (In reply to Yuri Rumyantsev from comment #12)
> > > Created attachment 38367 [details]
> > > modified patch
> >
> > The loop->aux flagging looks redundant to me. Why is ->safelen only valid
> > before vectorization? I suppose we're lucky that no pass before
> > vectorization
> > applies any unrolling (like predictive commoning for example) as such pass
> > must adjust ->safelen accordingly. But as LIM only cares for safelen > 0
> > _this_ property shouldn't change, not even by vectorization, no?
> >
>
> SIMD lane access is not invariant before vectorization but is invariant after
> vectorization. This means when GOMP_SIMD_LANE calls are removed we can't use
> safelen for invariant moves anymore.
Ah, I see. So the vectorizer needs to clear ->safelen then if
safelen doesn't apply to simduid.
Richard.
>From gcc-bugs-return-523723-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 11:48:51 2016
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Subject: [Bug tree-optimization/70526] [5 Regression] GCC 6 miscompiles Firefox JIT compiler
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--- Comment #12 from Jan de Mooij <jandemooij+gccbugs at gmail dot com> ---
(In reply to Richard Biener from comment #11)
> The patch has not yet been backported to GCC 5.
I'm using:
g++-6 (Ubuntu 6.0.1-1ubuntu11) 6.0.0 20160414 (experimental) [trunk revision
234994]
Shouldn't that have the patch? Revision 234994 > 234749.
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Subject: [Bug middle-end/70871] questionable optimisation in fold-const.c
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Jan Smets <jan.smets@alcatel-lucent.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #38376|0 |1
is obsolete| |
--- Comment #3 from Jan Smets <jan.smets@alcatel-lucent.com> ---
Created attachment 38377
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38377&action=edit
possible solution
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Subject: [Bug sanitizer/70342] g++ -fsanitize=undefined never finishes compiling (>24h) in qtxmlpatterns test suite
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--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Apr 29 12:32:45 2016
New Revision: 235637
URL: https://gcc.gnu.org/viewcvs?rev=235637&root=gcc&view=rev
Log:
PR sanitizer/70342
* fold-const.c (tree_single_nonzero_warnv_p): For TARGET_EXPR, use
TARGET_EXPR_SLOT as a base.
* g++.dg/ubsan/null-7.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/ubsan/null-7.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug sanitizer/70342] g++ -fsanitize=undefined never finishes compiling (>24h) in qtxmlpatterns test suite
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--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed for GCC 7, will backport to GCC 6 after a while.
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Subject: [Bug c/70852] ice in warn_for_memset
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70852] ice in warn_for_memset
Date: Fri, 29 Apr 2016 12:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70852
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri Apr 29 12:39:25 2016
New Revision: 235638
URL: https://gcc.gnu.org/viewcvs?rev=235638&root=gcc&view=rev
Log:
PR c/70852
* c-common.c (warn_for_memset): Check domain before accessing it.
* gcc.dg/pr70852.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr70852.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/70526] [5 Regression] GCC 6 miscompiles Firefox JIT compiler
Date: Fri, 29 Apr 2016 12:45:00 -0000
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
disabling SRA doesn't help anymore.
>From gcc-bugs-return-523730-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 12:45:34 2016
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70803] gcc.dg/vect/pr56625.c FAILs
Date: Fri, 29 Apr 2016 12:45:00 -0000
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--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #1 from amker at gcc dot gnu.org ---
> Thanks for reporting this, I will check it. Maybe a simple "vect_int_mult" to
> skip on some targets.
Right, restricting the scan to vect_int_mult targets works on sparc, and
i386 results are unchanged.
Rainer
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Subject: [Bug c/70859] Bad column number in type-generic function errors
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-29
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-523731-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 12:49:28 2016
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Subject: [Bug tree-optimization/70526] [5 Regression] GCC 6 miscompiles Firefox JIT compiler
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--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
no differences in GIMPLE dumps with -f[no-]strict-aliasing, so this is now a
RTL optimization issue. -fno-schedule-insns2 fixes it ...
>From gcc-bugs-return-523733-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 13:06:46 2016
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Subject: [Bug rtl-optimization/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|tree-optimization |rtl-optimization
Summary|[5 Regression] GCC 6 |[5/6 Regression] GCC 6
|miscompiles Firefox JIT |miscompiles Firefox JIT
|compiler |compiler
--- Comment #15 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
-fno-sched-last-insn-heuristic is enough to "fix" the issue.
>From gcc-bugs-return-523734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 13:19:13 2016
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Subject: [Bug rtl-optimization/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
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--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
In ToConstantOrRegister:
-(insn 66 64 88 7 (set (mem:SI (reg/f:DI 0 ax [orig:90 _12 ] [90]) [2
MEM[(struct Register *)_12]+0 S4 A32])
+(insn:TI 89 64 66 7 (set (reg:DI 1 dx [orig:125 D.3219+8 ] [125])
+ (mem/c:DI (plus:DI (reg/f:DI 7 sp)
+ (const_int 8 [0x8])) [4 D.3125+8 S8 A64])) t.C:76 85
{*movdi_internal}
+ (nil))
+(insn 66 89 151 7 (set (mem:SI (reg/f:DI 0 ax [orig:90 _12 ] [90]) [2
MEM[(struct Register *)_12]+0 S4 A32])
(reg:SI 6 bp [orig:94 D.3225 ] [94])) t.C:39 86 {*movsi_internal}
(expr_list:REG_DEAD (reg:SI 6 bp [orig:94 D.3225 ] [94])
(expr_list:REG_DEAD (reg/f:DI 0 ax [orig:90 _12 ] [90])
(nil))))
-(insn 88 66 89 7 (set (reg:DI 0 ax [orig:124 D.3219 ] [124])
- (mem/c:DI (reg/f:DI 7 sp) [4 D.3125+0 S8 A128])) t.C:76 85
{*movdi_internal}
+(insn 151 66 88 7 (use (reg:DI 1 dx)) t.C:77 -1
(nil))
-(insn 89 88 150 7 (set (reg:DI 1 dx [orig:125 D.3219+8 ] [125])
- (mem/c:DI (plus:DI (reg/f:DI 7 sp)
- (const_int 8 [0x8])) [4 D.3125+8 S8 A64])) t.C:76 85
{*movdi_internal}
- (nil))
-(insn 150 89 151 7 (use (reg:SI 0 ax)) t.C:77 -1
- (nil))
-(insn 151 150 152 7 (use (reg:DI 1 dx)) t.C:77 -1
+(insn:TI 88 151 163 7 (set (reg:DI 0 ax [orig:124 D.3219 ] [124])
+ (mem/c:DI (reg/f:DI 7 sp) [4 D.3125+0 S8 A128])) t.C:76 85
{*movdi_internal}
(nil))
but
# PT = nonlocal { D.3125 }
_12 = TypedOrValueRegister::dataTyped (&D.3125);
MEM[(struct Register *)_12] = reg$reg__34;
reg = D.3125;
so _12 may point to D.3125.
_BUT_ here we access D.3125 both as Register (the store) and as its declared
type TypedOrValueRegister (the load). Thus this is an invalid testcase.
Quoting a larger part:
struct TypedOrValueRegister D.3125;
...
MEM[(struct &)&D.3125] ={v} {CLOBBER};
D.3125.type_ = type_2(D);
# PT = nonlocal { D.3125 }
_12 = TypedOrValueRegister::dataTyped (&D.3125);
MEM[(struct Register *)_12] = reg$reg__34;
reg = D.3125;
MEM[(struct &)&D.3126] ={v} {CLOBBER};
D.3126.reg_ = reg;
D.3219 = D.3126;
D.3126 ={v} {CLOBBER};
D.3125 ={v} {CLOBBER};
<bb 10>:
return D.3219;
TypedOrValueRegister(MIRType type, Register reg)
: type_(type)
{
dataTyped() = reg;
}
this dataTyped() use to store to TypedOrValueRegister is bogus. You can't
refer to that part of the storage by copying *this.
Hmm.
Basically once you start the lifetime of an object inside the AlignedStorage
area you can no longer access it using the enclosing object as a whole.
Obviously doing sth like
struct C { C(); ~C{}; };
struct S
{
AlignedStorage<...> typed;
};
S s;
new C (S.typed) ();
S s2 = s;
doesn't properly transfer 'C' and thus this is expected behavior. It
might have worked with POD 'C' (not sure if by design). You have to
invoke a proper way of moving the instantiated sub-object.
So I think it's invalid even if somewhat unfortunate.
Maybe worth a DR ;)
>From gcc-bugs-return-523735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:03:41 2016
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Subject: [Bug rtl-optimization/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
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--- Comment #17 from Jan de Mooij <jandemooij+gccbugs at gmail dot com> ---
Thank you for looking into this again.
I don't understand comment 16 though:
> _BUT_ here we access D.3125 both as Register (the store)
> and as its declared type TypedOrValueRegister (the load).
So D.3125 is a TypedOrValueRegister right? TypedOrValueRegister is defined as
class TypedOrValueRegister
{
MIRType type_;
AlignedStorage2<Register> typed;
...
So IIUC it's wrong to store to |typed| in the constructor, by doing this:
*typed.addr() = reg;
Why is that? Any suggestions on how to fix this on our end?
>From gcc-bugs-return-523736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:04:02 2016
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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70874] New: Segmentation violation in tree-chkp.c chkp_walk_pointer_assignments
Date: Fri, 29 Apr 2016 14:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70874
Bug ID: 70874
Summary: Segmentation violation in tree-chkp.c
chkp_walk_pointer_assignments
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: zeccav at gmail dot com
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/* gcc -fsanitize=undefined -fcheck-pointer-bounds -mmpx */
void f(char *a, int *b)
{
*b = *a;
}
/*
* p.c:5:1: internal compiler error: Segmentation fault
* }
* ^
* 0x9caebf crash_signal
*../../gcc-6.1.0/gcc/toplev.c:333
*0xa4ad08 chkp_walk_pointer_assignments
*../../gcc-6.1.0/gcc/tree-chkp.c:3725
*0xa4c85f chkp_finish_file()
*../../gcc-6.1.0/gcc/tree-chkp.c:3835
*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.
*/
>From gcc-bugs-return-523737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:19:39 2016
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Subject: [Bug c/70875] New: ICE in get_ubsan_type_info_for_type with -fsanitize=undefined
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Bug ID: 70875
Summary: ICE in get_ubsan_type_info_for_type with
-fsanitize=undefined
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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/* gcc -fsanitize=undefined */
int foo (int n, int k)
{
struct S
{
int i[n];
int value;
} s[2];
return s[k].value = 0;
}
int main ()
{
return foo (2, 0);
}
/* p.c: In function ‘foo’:
* p.c:2:5: internal compiler error: in get_ubsan_type_info_for_type, at
ubsan.c:305
* int foo (int n, int k)
* ^~~
* 0x9e54e4 get_ubsan_type_info_for_type
* ../../gcc-6.1.0/gcc/ubsan.c:305
* 0x9e54e4 ubsan_type_descriptor(tree_node*, ubsan_print_style)
* ../../gcc-6.1.0/gcc/ubsan.c:454
* 0x9e5709 ubsan_expand_bounds_ifn(gimple_stmt_iterator*)
* ../../gcc-6.1.0/gcc/ubsan.c:692
* 0x9ea7e9 execute
* ../../gcc-6.1.0/gcc/sanopt.c:696
* 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.
*/
>From gcc-bugs-return-523738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:21:25 2016
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Subject: [Bug target/69804] [5/6] ICE with -fsanitize=undefined -fcheck-pointer-bounds -mmpx
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Ilya Enkovich <ienkovich at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zeccav at gmail dot com
--- Comment #3 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
*** Bug 70874 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:21:25 2016
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Subject: [Bug c/70874] Segmentation violation in tree-chkp.c chkp_walk_pointer_assignments
Date: Fri, 29 Apr 2016 14:21:00 -0000
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Ilya Enkovich <ienkovich at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |ienkovich at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Duplicate
*** This bug has been marked as a duplicate of bug 69804 ***
>From gcc-bugs-return-523740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:23:41 2016
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Subject: [Bug c/70875] ICE in get_ubsan_type_info_for_type with -fsanitize=undefined
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-29
CC| |mpolacek at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed, mine.
>From gcc-bugs-return-523741-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:26:46 2016
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Subject: [Bug bootstrap/70173] make distclean: leaves stage_final and libcc1/compiler-name.h
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--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This is fixed on trunk now. Does it need backports?
>From gcc-bugs-return-523742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:29:28 2016
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Subject: [Bug testsuite/70369] [testsuite,ARM,AArch64] AdvSIMD intrinsic tests missing
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--- Comment #3 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Created attachment 38378
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38378&action=edit
list of tests missing for aarch64
On AArch64, there are many intrinsics defined in arm_neon.h for which there is
no test.
>From gcc-bugs-return-523743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:33:53 2016
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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70876] New: ICE in chkp_find_bounds: Unexpected tree code with_size_expr
Date: Fri, 29 Apr 2016 14:33:00 -0000
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Bug ID: 70876
Summary: ICE in chkp_find_bounds: Unexpected tree code
with_size_expr
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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/* gcc -fcheck-pointer-bounds -mmpx */
void f (char *s1, char *s2)
{
int z = 5;
struct { char a[z]; } x;
s1[0] = s2[0];
foo (x, x);
}
/*p.c: In function ‘f’:
* p.c:10:3: warning: implicit declaration of function ‘foo’
[-Wimplicit-function-declaration]
* foo (x, x);
* ^~~
* p.c: In function ‘f.chkp’:
* p.c:11:1: internal compiler error: chkp_find_bounds: Unexpected tree code
with_size_expr
* }
* ^
* 0xa4de44 chkp_find_bounds_1
*../../gcc-6.1.0/gcc/tree-chkp.c:3667
* 0xa51f78 chkp_find_bounds
* ../../gcc-6.1.0/gcc/tree-chkp.c:3687
* 0xa51f78 chkp_add_bounds_to_call_stmt
* ../../gcc-6.1.0/gcc/tree-chkp.c:1896
* 0xa51f78 chkp_instrument_function
* ../../gcc-6.1.0/gcc/tree-chkp.c:4271
* 0xa51f78 chkp_execute
* ../../gcc-6.1.0/gcc/tree-chkp.c:4455
* 0xa51f78 execute
* ../../gcc-6.1.0/gcc/tree-chkp.c:4514
* 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.
*/
>From gcc-bugs-return-523744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:48:41 2016
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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/70851] internal compiler error: in create_tmp_var, at gimple-expr.c:473
Date: Fri, 29 Apr 2016 14:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70851
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-29
Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I have a fix.
>From gcc-bugs-return-523745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:49:29 2016
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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70877] New: ICE in in convert_move
Date: Fri, 29 Apr 2016 14:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70877
Bug ID: 70877
Summary: ICE in in convert_move
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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/* gcc -fcheck-pointer-bounds -mmpx */
int foo(int);
typedef struct {
double d;
int a;
} str_t;
void bar(double d, int i, str_t s)
{
d = ((double (*) (int)) foo) (i);
}
/*p.c: In function ‘bar’:
* p.c:11:8: warning: function called through a non-compatible type
* d = ((double (*) (int)) foo) (i);
* ~^~~~~~~~~~~~~~~~~~~~~~~
* p.c: In function ‘bar.chkp’:
* p.c:11:5: internal compiler error: in convert_move, at expr.c:268
* d = ((double (*) (int)) foo) (i);
* ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* 0x768d18 convert_move(rtx_def*, rtx_def*, int)
* ../../gcc-6.1.0/gcc/expr.c:268
* 0x76e515 store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
* ../../gcc-6.1.0/gcc/expr.c:5483
* 0x76e98f expand_assignment(tree_node*, tree_node*, bool)
* ../../gcc-6.1.0/gcc/expr.c:5175
* 0x691a9c expand_call_stmt
* ../../gcc-6.1.0/gcc/cfgexpand.c:2658
* 0x691a9c expand_gimple_stmt_1
* ../../gcc-6.1.0/gcc/cfgexpand.c:3548
* 0x691a9c expand_gimple_stmt
* ../../gcc-6.1.0/gcc/cfgexpand.c:3714
* 0x693435 expand_gimple_basic_block
* ../../gcc-6.1.0/gcc/cfgexpand.c:5720
* 0x698316 execute
* ../../gcc-6.1.0/gcc/cfgexpand.c:6335
* 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.
*/
>From gcc-bugs-return-523746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 14:57:32 2016
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Subject: [Bug debug/68860] [6/7 regression] FAIL: gcc.dg/guality/pr36728-1.c -flto -O3 -g line 16/7 arg1 == 1
Date: Fri, 29 Apr 2016 14:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68860
--- Comment #14 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
Dominik Vogt, I've noticed that sort of failure in several of the guality test
cases where a test is done at line X but optimization moves the assignment
being tested to after line X. Should the tests be adjusted in all those cases?
>From gcc-bugs-return-523747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 15:13:48 2016
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Subject: [Bug tree-optimization/70803] gcc.dg/vect/pr56625.c FAILs
Date: Fri, 29 Apr 2016 15:13:00 -0000
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--- Comment #3 from amker at gcc dot gnu.org ---
Author: amker
Date: Fri Apr 29 15:13:03 2016
New Revision: 235644
URL: https://gcc.gnu.org/viewcvs?rev=235644&root=gcc&view=rev
Log:
gcc/testsuite/ChangeLog
PR tree-optimization/70803
* gcc.dg/vect/pr56625.c: Require vect_int_mult.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vect/pr56625.c
>From gcc-bugs-return-523748-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 15:14:52 2016
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Subject: [Bug c++/67737] [C++1z] ICE in make_decl_rtl, at varasm.c:1299
Date: Fri, 29 Apr 2016 15:14:00 -0000
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Vittorio Zecca <zeccav at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zeccav at gmail dot com
--- Comment #7 from Vittorio Zecca <zeccav at gmail dot com> ---
With gcc 6.1.0, maybe a shorter reproducer
/* gcc -fcheck-pointer-bounds -mmpx p.c */
int main ()
{
int size = 10;
typedef struct
{
char val[size];
} block;
block b;
block retframe_block () {}
retframe_block ();
}
/*
* p.c: In function ‘main.chkp’:
* p.c:11:3: internal compiler error: in make_decl_rtl, at varasm.c:1299
* retframe_block ();
* ^~~~~~~~~~~~~~
* 0xbf101d make_decl_rtl(tree_node*)
* ../../gcc-6.1.0/gcc/varasm.c:1295
* 0x7658b6 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
* ../../gcc-6.1.0/gcc/expr.c:9612
* 0xc4cddf expand_normal
* ../../gcc-6.1.0/gcc/expr.h:262
* 0xc4cddf ix86_expand_builtin
* ../../gcc-6.1.0/gcc/config/i386/i386.c:40323
* 0x67643c expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
* ../../gcc-6.1.0/gcc/builtins.c:5624
* 0x765171 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
* ../../gcc-6.1.0/gcc/expr.c:10591
* 0x682662 initialize_argument_information
* ../../gcc-6.1.0/gcc/calls.c:1186
* 0x682662 expand_call(tree_node*, rtx_def*, int)
* ../../gcc-6.1.0/gcc/calls.c:2699
* 0x764c06 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
* ../../gcc-6.1.0/gcc/expr.c:10594
* 0x76dc39 store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
* ../../gcc-6.1.0/gcc/expr.c:5406
* 0x76e98f expand_assignment(tree_node*, tree_node*, bool)
* ../../gcc-6.1.0/gcc/expr.c:5175
* 0x691a9c expand_call_stmt
* ../../gcc-6.1.0/gcc/cfgexpand.c:2658
* 0x691a9c expand_gimple_stmt_1
* ../../gcc-6.1.0/gcc/cfgexpand.c:3548
* 0x691a9c expand_gimple_stmt
* ../../gcc-6.1.0/gcc/cfgexpand.c:3714
* 0x693435 expand_gimple_basic_block
* ../../gcc-6.1.0/gcc/cfgexpand.c:5720
* 0x698316 execute
* ../../gcc-6.1.0/gcc/cfgexpand.c:6335
* 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.
*/
>From gcc-bugs-return-523749-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 15:24:40 2016
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Subject: [Bug rtl-optimization/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
Date: Fri, 29 Apr 2016 15:24:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #18 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Richard -- please correct if I'm wrong -- means here:
> You can't refer to that part of the storage by copying *this.
... that the implicitly instantiated copy constructor (as well as assignment
operator, for that matter) will copy this->typed as a char[]/uint64_t union,
while it actually contains a value of type Register. You need an explicit copy
constructor that would assign this->typed with the correct type via
'typed.addr() = ...' like the existing constructor does.
(If T was POD, you could have had it in the union in the first place, and this
issue wouldn't arise)
>From gcc-bugs-return-523750-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 15:26:43 2016
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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70878] New: ICE in expand_expr_addr_expr_1, at expr.c:7680
Date: Fri, 29 Apr 2016 15:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70878
Bug ID: 70878
Summary: ICE in expand_expr_addr_expr_1, at expr.c:7680
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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/* gcc -fsanitize=undefined */
void * sbrk ()
{
volatile register __attribute__ ((__spu_vector__)) unsigned int sp_r1 __asm__
("1");
__builtin_spu_extract (sp_r1, 0);
}
/*
/home/vitti/f95/cc/gccerr38.c: In function ‘sbrk’:
/home/vitti/f95/cc/gccerr38.c:3:2: warning: ‘__spu_vector__’ attribute
directive ignored [-Wattributes]
volatile register __attribute__ ((__spu_vector__)) unsigned int sp_r1 __asm__
("1");
^~~~~~~~
/home/vitti/f95/cc/gccerr38.c:5:2: warning: implicit declaration of function
‘__builtin_spu_extract’ [-Wimplicit-function-declaration]
__builtin_spu_extract (sp_r1, 0);
^~~~~~~~~~~~~~~~~~~~~
/home/vitti/f95/cc/gccerr38.c:1:8: internal compiler error: in
expand_expr_addr_expr_1, at expr.c:7680
void * sbrk ()
^~~~
0x77627d expand_expr_addr_expr_1
../../gcc-6.1.0/gcc/expr.c:7680
0x7645b3 expand_expr_addr_expr
../../gcc-6.1.0/gcc/expr.c:7793
0x7645b3 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc-6.1.0/gcc/expr.c:10825
0x774ddc expand_expr
../../gcc-6.1.0/gcc/expr.h:256
0x774ddc expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../gcc-6.1.0/gcc/expr.c:8180
0x69201e expand_gimple_stmt_1
../../gcc-6.1.0/gcc/cfgexpand.c:3653
0x69201e expand_gimple_stmt
../../gcc-6.1.0/gcc/cfgexpand.c:3714
0x693435 expand_gimple_basic_block
../../gcc-6.1.0/gcc/cfgexpand.c:5720
0x698316 execute
../../gcc-6.1.0/gcc/cfgexpand.c:6335
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.
*/
>From gcc-bugs-return-523751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 15:28:12 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70803] gcc.dg/vect/pr56625.c FAILs
Date: Fri, 29 Apr 2016 15:28:00 -0000
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amker at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from amker at gcc dot gnu.org ---
Fixed according to #2 comment.
>From gcc-bugs-return-523752-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 15:50:57 2016
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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++/69531] Implement CWG 1307; Differently bounded array parameters
Date: Fri, 29 Apr 2016 15:50:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-04-29
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The example in the core issue compiles fine with both 6.0 and 5.3 (see below)
but the provided test case does not. Based on my reading of the relevant
paragraphs of the current working paper (N4567) I agree the test case is valid
and the call should resolve to the first overload of f (i.e., int
f(int(&&)[1])).
$ cat x.cpp && g++ -S -Wall -Wextra -Wpedantic -std=c++14 -xc++ x.cpp
void f (int const(&)[1]);
void f (int const(&)[2]);
int main ()
{
f ({1});
}
x.cpp: In function ‘int main()’:
x.cpp:6:9: error: call of overloaded ‘f(<brace-enclosed initializer list>)’ is
ambiguous
f ({1});
^
x.cpp:1:6: note: candidate: void f(const int (&)[1])
void f (int const(&)[1]);
^
x.cpp:2:6: note: candidate: void f(const int (&)[2])
void f (int const(&)[2]);
^
Test case from core issue 1307:
$ cat x.cpp && ~/bin/gcc-5.1.0/bin/g++ -S -Wall -Wextra -Wpedantic -std=c++14
-xc++ x.cpp
void f (int const(&)[2]);
void f (int const(&)[3]);
int main ()
{
f ({1, 2, 3});
}
$
>From gcc-bugs-return-523753-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 16:17:49 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70879] New: Missed jump threading opportunity with multiple != conditions
Date: Fri, 29 Apr 2016 16:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70879
Bug ID: 70879
Summary: Missed jump threading opportunity with multiple !=
conditions
Product: gcc
Version: 6.1.0
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Test case:
void bar (void);
void baz (void);
void
foo (int a)
{
if (a != 5 && a != 10)
bar ();
if (a == 10)
baz ();
}
VRP1 dump:
SSA form after inserting ASSERT_EXPRs
void foo(int) (int a)
{
bool _4;
bool _5;
bool _6;
<bb 2>:
_4 = a_3(D) != 5;
_5 = a_3(D) != 10;
_6 = _4 & _5;
if (_6 != 0)
goto <bb 3>;
else
goto <bb 4>;
<bb 3>:
a_10 = ASSERT_EXPR <a_3(D), a_3(D) != 5>;
a_11 = ASSERT_EXPR <a_10, a_10 != 10>;
bar ();
<bb 4>:
if (a_3(D) == 5)
goto <bb 5>;
else
goto <bb 6>;
<bb 5>:
baz ();
<bb 6>:
return;
}
If bar is called then baz cannot possibly be called so in bb3 we ought to jump
straight to bb6 instead of falling through to bb4.
The problem is that when discovering dominating ASSERT_EXPRs of a_3 we only
look at the immediate uses of a_3 so we use the ASSERT_EXPR a_10 instead of
a_11, but the latter contains more information.
>From gcc-bugs-return-523754-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 16:47:15 2016
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From: "tsarkov at cs dot man.ac.uk" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug web/70880] New: Main page GCC 7.0 links point to GCC 6
Date: Fri, 29 Apr 2016 16:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70880
Bug ID: 70880
Summary: Main page GCC 7.0 links point to GCC 6
Product: gcc
Version: unknown
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GCC 7.0 "release criteria" and "changes" links are pointing to gcc-6 versions.
The branch status should also be updated to stage 1.
>From gcc-bugs-return-523755-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 16:53:38 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/37780] Conditional expression with __builtin_clz() should be optimized out
Date: Fri, 29 Apr 2016 16:53:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |ktkachov at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |ktkachov at gcc dot gnu.org
--- Comment #3 from ktkachov at gcc dot gnu.org ---
I'll have a look
>From gcc-bugs-return-523756-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 17:21:22 2016
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Subject: [Bug target/69810] PowerPC64: unrecognizable insn
Date: Fri, 29 Apr 2016 17:21:00 -0000
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--- Comment #9 from David Edelsohn <dje at gcc dot gnu.org> ---
Author: dje
Date: Fri Apr 29 17:20:36 2016
New Revision: 235646
URL: https://gcc.gnu.org/viewcvs?rev=235646&root=gcc&view=rev
Log:
PR target/69810
* config/rs6000/rs6000.md (EXTQI): Don't allow extension to HImode.
(zero_extendqi<mode>2_dot): Revert earlier conversion from
define_insn_and_split to define_insn.
(zero_extendqi<mode>2_dot2): Same.
(extendqi<mode>2_dot): Same.
(extendqi<mode>2_dot2): Same.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.md
>From gcc-bugs-return-523757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 17:28:46 2016
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From: "hjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70155] Use SSE for TImode load/store
Date: Fri, 29 Apr 2016 17:28:00 -0000
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--- Comment #7 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Fri Apr 29 17:27:59 2016
New Revision: 235647
URL: https://gcc.gnu.org/viewcvs?rev=235647&root=gcc&view=rev
Log:
Update scan-assembler-not in PR target/70155 tests
Since PIC leads to the *movdi_internal pattern, check for nonexistence
of the *movdi_internal pattern in PR target/70155 tests only if PIC is
off.
* gcc.target/i386/pr70155-1.c: Check for nonexistence of the
*movdi_internal pattern only if PIC off.
* gcc.target/i386/pr70155-2.c: Likewise.
* gcc.target/i386/pr70155-3.c: Likewise.
* gcc.target/i386/pr70155-4.c: Likewise.
* gcc.target/i386/pr70155-5.c: Likewise.
* gcc.target/i386/pr70155-6.c: Likewise.
* gcc.target/i386/pr70155-7.c: Likewise.
* gcc.target/i386/pr70155-8.c: Likewise.
* gcc.target/i386/pr70155-15.c: Likewise.
* gcc.target/i386/pr70155-17.c: Likewise.
* gcc.target/i386/pr70155-22.c: Likewise.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr70155-1.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-15.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-17.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-2.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-22.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-3.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-4.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-5.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-6.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-7.c
trunk/gcc/testsuite/gcc.target/i386/pr70155-8.c
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
Date: Fri, 29 Apr 2016 17:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49244
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 #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38379
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38379&action=edit
gcc7-pr49244.patch
Untested fix.
>From gcc-bugs-return-523759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 17:38:40 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/70626] bogus results in 'acc parallel loop' reductions
Date: Fri, 29 Apr 2016 17:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70626
--- Comment #3 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Fri Apr 29 17:37:55 2016
New Revision: 235650
URL: https://gcc.gnu.org/viewcvs?rev=235650&root=gcc&view=rev
Log:
gcc/c-family/
PR middle-end/70626
* c-common.h (c_oacc_split_loop_clauses): Add boolean argument.
* c-omp.c (c_oacc_split_loop_clauses): Use it to duplicate
reduction clauses in acc parallel loops.
gcc/c/
PR middle-end/70626
* c-parser.c (c_parser_oacc_loop): Don't augment mask with
OACC_LOOP_CLAUSE_MASK.
(c_parser_oacc_kernels_parallel): Update call to
c_oacc_split_loop_clauses.
gcc/cp/
PR middle-end/70626
* parser.c (cp_parser_oacc_loop): Don't augment mask with
OACC_LOOP_CLAUSE_MASK.
(cp_parser_oacc_kernels_parallel): Update call to
c_oacc_split_loop_clauses.
gcc/fortran/
PR middle-end/70626
* trans-openmp.c (gfc_trans_oacc_combined_directive): Duplicate
the reduction clause in both parallel and loop directives.
gcc/testsuite/
PR middle-end/70626
* c-c++-common/goacc/combined-reduction.c: New test.
* gfortran.dg/goacc/reduction-2.f95: Add check for kernels reductions.
libgomp/
PR middle-end/70626
* testsuite/libgomp.oacc-c++/template-reduction.C: Adjust test.
* testsuite/libgomp.oacc-c-c++-common/combined-reduction.c: New test.
* testsuite/libgomp.oacc-fortran/combined-reduction.f90: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/c-c++-common/goacc/combined-reduction.c
branches/gcc-6-branch/libgomp/testsuite/libgomp.oacc-c-c++-common/combined-reduction.c
branches/gcc-6-branch/libgomp/testsuite/libgomp.oacc-fortran/combined-reduction.f90
Modified:
branches/gcc-6-branch/gcc/c-family/ChangeLog
branches/gcc-6-branch/gcc/c-family/c-common.h
branches/gcc-6-branch/gcc/c-family/c-omp.c
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/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/trans-openmp.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/goacc/reduction-2.f95
branches/gcc-6-branch/libgomp/ChangeLog
branches/gcc-6-branch/libgomp/testsuite/libgomp.oacc-c++/template-reduction.C
>From gcc-bugs-return-523760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 17:41:03 2016
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From: "ian at geometrian dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70881] New: -Wunused-parameter incorrect for macro case
Date: Fri, 29 Apr 2016 17:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70881
Bug ID: 70881
Summary: -Wunused-parameter incorrect for macro case
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ian at geometrian dot com
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Created attachment 38380
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38380&action=edit
Simple example.
In the attached example, adapted from real-world image-processing code, a macro
is used to paste a case statement that contains a parameter. However,
-Wunused-parameter reports that it is not used, erroneously.
Produces:
macro-example.cpp: In function 'ImageBase* get_new_diffabs(const ImageBase*,
const ImageBase*)':
35 : warning: unused parameter 'img1' [-Wunused-parameter]
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Subject: [Bug middle-end/70626] bogus results in 'acc parallel loop' reductions
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70626
--- Comment #4 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Fri Apr 29 17:42:04 2016
New Revision: 235651
URL: https://gcc.gnu.org/viewcvs?rev=235651&root=gcc&view=rev
Log:
gcc/c-family/
PR middle-end/70626
* c-common.h (c_oacc_split_loop_clauses): Add boolean argument.
* c-omp.c (c_oacc_split_loop_clauses): Use it to duplicate
reduction clauses in acc parallel loops.
gcc/c/
PR middle-end/70626
* c-parser.c (c_parser_oacc_loop): Don't augment mask with
OACC_LOOP_CLAUSE_MASK.
(c_parser_oacc_kernels_parallel): Update call to
c_oacc_split_loop_clauses.
gcc/cp/
PR middle-end/70626
* parser.c (cp_parser_oacc_loop): Don't augment mask with
OACC_LOOP_CLAUSE_MASK.
(cp_parser_oacc_kernels_parallel): Update call to
c_oacc_split_loop_clauses.
gcc/fortran/
PR middle-end/70626
* trans-openmp.c (gfc_trans_oacc_combined_directive): Duplicate
the reduction clause in both parallel and loop directives.
gcc/testsuite/
PR middle-end/70626
* c-c++-common/goacc/combined-reduction.c: New test.
* gfortran.dg/goacc/reduction-2.f95: Add check for kernels reductions.
libgomp/
PR middle-end/70626
* testsuite/libgomp.oacc-c++/template-reduction.C: Adjust test.
* testsuite/libgomp.oacc-c-c++-common/combined-reduction.c: New test.
* testsuite/libgomp.oacc-fortran/combined-reduction.f90: New test.
Added:
trunk/gcc/testsuite/c-c++-common/goacc/combined-reduction.c
trunk/libgomp/testsuite/libgomp.oacc-c-c++-common/combined-reduction.c
trunk/libgomp/testsuite/libgomp.oacc-fortran/combined-reduction.f90
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.h
trunk/gcc/c-family/c-omp.c
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-parser.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-openmp.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/goacc/reduction-2.f95
trunk/libgomp/ChangeLog
trunk/libgomp/testsuite/libgomp.oacc-c++/template-reduction.C
>From gcc-bugs-return-523762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 17:43:32 2016
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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/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
Date: Fri, 29 Apr 2016 17:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49244
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The attached patch seems to work (just eyeballed assembly of the following
testcase, haven't turned it into a runtime testcase that would verify it works
right yet). It should detect both the compile time known bit atomic bit test
and {set,complement,reset} and variable bit, though the latter I guess for
int/long/long long only, not for short (and for char there even isn't bt?b
instruction) - the reason for short being problematic is because of C integral
promotions, so for unsigned short mask = (unsigned short) 1 << cnt; one really
doesn't know if it has exactly one bit set - it could as well have zero bits
set without invoking undefined behavior, while for int/long/long long, 1 << cnt
will be non-zero for any case that doesn't invoke undefined behavior.
The patch currently recognizes just the fetch_and_op builtins, for xor it in
theory could also recognize op_and_fetch case and just invert the bit
afterwards.
-O2 -g -m64:
void bar (void);
int
f1 (int *a, int bit)
{
unsigned int mask = (1u << bit);
return (__sync_fetch_and_or (a, mask) & mask) != 0;
}
int
f2 (int *a, int bit)
{
unsigned int mask = (1u << bit);
unsigned int t1 = __atomic_fetch_or (a, mask, __ATOMIC_RELAXED);
unsigned int t2 = t1 & mask;
return t2 != 0;
}
long int
f3 (long int *a, int bit)
{
unsigned long int mask = (1ul << bit);
return (__atomic_fetch_or (a, mask, __ATOMIC_SEQ_CST) & mask) == 0;
}
int
f4 (int *a)
{
unsigned int mask = (1u << 7);
return (__sync_fetch_and_or (a, mask) & mask) != 0;
}
int
f5 (int *a)
{
unsigned int mask = (1u << 13);
return (__atomic_fetch_or (a, mask, __ATOMIC_RELAXED) & mask) != 0;
}
int
f6 (int *a)
{
unsigned int mask = (1u << 0);
return (__atomic_fetch_or (a, mask, __ATOMIC_SEQ_CST) & mask) != 0;
}
void
f7 (int *a, int bit)
{
unsigned int mask = (1u << bit);
if ((__sync_fetch_and_xor (a, mask) & mask) != 0)
bar ();
}
void
f8 (int *a, int bit)
{
unsigned int mask = (1u << bit);
if ((__atomic_fetch_xor (a, mask, __ATOMIC_RELAXED) & mask) == 0)
bar ();
}
int
f9 (int *a, int bit)
{
unsigned int mask = (1u << bit);
return (__atomic_fetch_xor (a, mask, __ATOMIC_SEQ_CST) & mask) != 0;
}
int
f10 (int *a)
{
unsigned int mask = (1u << 7);
return (__sync_fetch_and_xor (a, mask) & mask) != 0;
}
int
f11 (int *a)
{
unsigned int mask = (1u << 13);
return (__atomic_fetch_xor (a, mask, __ATOMIC_RELAXED) & mask) != 0;
}
int
f12 (int *a)
{
unsigned int mask = (1u << 0);
return (__atomic_fetch_xor (a, mask, __ATOMIC_SEQ_CST) & mask) != 0;
}
int
f13 (int *a, int bit)
{
unsigned int mask = (1u << bit);
return (__sync_fetch_and_and (a, ~mask) & mask) != 0;
}
int
f14 (int *a, int bit)
{
unsigned int mask = (1u << bit);
return (__atomic_fetch_and (a, ~mask, __ATOMIC_RELAXED) & mask) != 0;
}
int
f15 (int *a, int bit)
{
unsigned int mask = (1u << bit);
return (__atomic_fetch_and (a, ~mask, __ATOMIC_SEQ_CST) & mask) != 0;
}
int
f16 (int *a)
{
unsigned int mask = (1u << 7);
return (__sync_fetch_and_and (a, ~mask) & mask) != 0;
}
int
f17 (int *a)
{
unsigned int mask = (1u << 13);
return (__atomic_fetch_and (a, ~mask, __ATOMIC_RELAXED) & mask) != 0;
}
int
f18 (int *a)
{
unsigned int mask = (1u << 0);
return (__atomic_fetch_and (a, ~mask, __ATOMIC_SEQ_CST) & mask) != 0;
}
>From gcc-bugs-return-523763-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 17:44:15 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70626] bogus results in 'acc parallel loop' reductions
Date: Fri, 29 Apr 2016 17:44:00 -0000
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cesar at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from cesar at gcc dot gnu.org ---
Fixed in trunk and and gcc-6-branch.
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Subject: [Bug rtl-optimization/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
Date: Fri, 29 Apr 2016 17:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526
--- Comment #19 from rguenther at suse dot de <rguenther at suse dot de> ---
On April 29, 2016 5:24:00 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=70526
>
>Alexander Monakov <amonakov at gcc dot gnu.org> changed:
>
> What |Removed |Added
>----------------------------------------------------------------------------
> CC| |amonakov at gcc dot gnu.org
>
>--- Comment #18 from Alexander Monakov <amonakov at gcc dot gnu.org>
>---
>Richard -- please correct if I'm wrong -- means here:
>
>> You can't refer to that part of the storage by copying *this.
>
>... that the implicitly instantiated copy constructor (as well as
>assignment
>operator, for that matter) will copy this->typed as a char[]/uint64_t
>union,
>while it actually contains a value of type Register. You need an
>explicit copy
>constructor that would assign this->typed with the correct type via
>'typed.addr() = ...' like the existing constructor does.
Yes. In fact the C++ FE for the copy constructor emits a simple aggregate
assignment which may be a problem on its own (regarding TBAA if this case is
supposed to be not invalid)
>(If T was POD, you could have had it in the union in the first place,
>and this
>issue wouldn't arise)
>From gcc-bugs-return-523765-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 17:49:58 2016
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Subject: [Bug c++/70881] -Wunused-parameter incorrect for macro case
Date: Fri, 29 Apr 2016 17:49:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The warning looks good to me, while you "use" img1 in a macro, that macro is
never used, just try g++ -E on your testcase.
Did you mean not to use \ at the end of line preceeding
_IMGPP_APPLY_GRAY_ALL(_IMGPP_CASE) by any chance?
>From gcc-bugs-return-523766-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 17:57:45 2016
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From: "ian at geometrian dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70881] -Wunused-parameter incorrect for macro case
Date: Fri, 29 Apr 2016 17:57:00 -0000
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Ian Mallett <ian at geometrian dot com> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Ian Mallett <ian at geometrian dot com> ---
Indeed, that trailing \ is erroneous. This is a bug in the original code as
well. Thanks and sorry for the noise.
>From gcc-bugs-return-523767-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 18:04:27 2016
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Subject: [Bug web/70880] Main page GCC 7.0 links point to GCC 6
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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> ---
We don't have gcc-7/ criteria.html nor changes.html yet, and we haven't been
adding those so early. So, IMHO gcc-6/criteria.html is good enough for now,
I've removed the changes link until we have a changes.html page for GCC 7
(having an empty page is not really useful).
I've tweaked the status.
>From gcc-bugs-return-523768-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 18:08:05 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Fri, 29 Apr 2016 18:08:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |7.0
Summary|[GCC7 Regressio] 20% |[7 Regressio] 20%
|performance regression at |performance regression at
|482.sphinx3 after r235442 |482.sphinx3 after r235442
|with -O2 -m32 on Haswell. |with -O2 -m32 on Haswell.
>From gcc-bugs-return-523769-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 18:19:06 2016
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Subject: [Bug libfortran/70311] libgfortran build dies on "implicit declaration of function strncasecmp"
Date: Fri, 29 Apr 2016 18:19:00 -0000
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--- Comment #2 from Keith Marshall <keith.marshall at mailinator dot com> ---
(In reply to Dominique d'Humieres from comment #1)
> Could some mingw32 guru assign this PR to her/himself?
Well, I should have thought that the requirement to include <strings.h> to
expose a prototype for strncasecmp() is more a POSIX.1 conformity issue, than
specifically a MinGW issue; you appear to be relying on a non-conformity in
glibc, which allows this prototype to be exposed by including <string.h>.
MinGW is simply stricter in this aspect of POSIX.1 conformity, so exposing a
weakness in your code. It would be inappropriate for you to expect MinGW to
become less POSIX.1 conformant, when the correct solution is for you to include
the proper header files, at point of use.
OTOH, the strnlen() issue is, perhaps, best addressed in MinGW; since the
function isn't universally supported by all Windows versions, which MinGW aims
to support, it is appropriate for MinGW to provide a suitable fall back.
>From gcc-bugs-return-523770-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 18:34:06 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Fri, 29 Apr 2016 18:34:00 -0000
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--- Comment #2 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Can you give me more information what exactly is causing the stall - which
instructions are affected, and what needs to be done to avoid it?
>From gcc-bugs-return-523771-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 19:03:24 2016
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Subject: [Bug fortran/67496] trans-array.c sanitizer runtime error: load of value 124, which is not a valid value for type 'bool'
Date: Fri, 29 Apr 2016 19:03:00 -0000
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--- Comment #3 from Vittorio Zecca <zeccav at gmail dot com> ---
Just back from my travels.
Sorry, I get the same warning on 6.1.0:
/home/vitti/1tb/vitti/gcc-6.1.0-undefined/gcc/f951 -quiet gfbug121.f
../../gcc-6.1.0/gcc/fortran/trans-array.c:2234:27: runtime error: load of value
112, which is not a valid value for type 'bool'
If you had a sanitized version of f951 maybe you could see it by yourself.
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Subject: [Bug c++/70882] New: vectorized sincos trashes the stack
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70882
Bug ID: 70882
Summary: vectorized sincos trashes the stack
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: blaffablaffa at gmail dot com
Target Milestone: ---
Created attachment 38381
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38381&action=edit
testcase
The double4 version of the vectorized sincos() in libmvec (glibc 2.22) causes
the stack to be corrupted, leading to assorted bugs such as crash, backtrace
corruption in gdb, etc. I am reporting a bug here because since it's the only
vectorized math function that uses pointers, so it might be an ABI problem. On
my CPU (ivybridge) I can only test the double4 version, not the wider ones.
Attached testcase, compile with
g++ -std=c++11 -O1 -fopenmp -ffast-math -march=ivybridge -mtune=ivybridge -o
double_sincos double_sincos.cpp
(interestingly, the vectorized call is not emitted with a c++ version lower
than 2011).
>From gcc-bugs-return-523773-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 19:08:45 2016
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Subject: [Bug c++/70882] vectorized sincos trashes the stack
Date: Fri, 29 Apr 2016 19:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70882
Lorenzo Pistone <blaffablaffa at gmail dot com> changed:
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--- Comment #1 from Lorenzo Pistone <blaffablaffa at gmail dot com> ---
glibc bug https://sourceware.org/bugzilla/show_bug.cgi?id=20024
>From gcc-bugs-return-523774-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 19:10:23 2016
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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/70883] New: inconsistent error message for calls to __builtin_add_overflow with too few arguments
Date: Fri, 29 Apr 2016 19:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70883
Bug ID: 70883
Summary: inconsistent error message for calls to
__builtin_add_overflow with too few arguments
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
This is a just a minor issue but it's one that I noticed when my newly written
new tests for the __builtin_op_overflow functions were failing. It turned out
that the failures were due to the assumption that GCC would diagnose the same
problem (insufficient number of arguments) using the same diagnostic. The test
case below shows that GCC uses one spelling ("not enough arguments") for the
error caused by calls to the type-generic __builtin_add_overflow and a
different spelling ("too few arguments") for the same error for
__builtin_sadd_overflow and the rest. Both C and C++ front ends have this
inconsistency. It seems like the second spelling is more prevalent and should
be used for consistency.
$ cat x.cpp && gcc -Wall -Wextra -Wpedantic -xc x.cpp
void f (int a)
{
__builtin_add_overflow (a);
__builtin_sadd_overflow (a);
}
void g (void)
{
f ();
}
x.cpp: In function ‘f’:
x.cpp:3:3: error: not enough arguments to function ‘__builtin_add_overflow’
__builtin_add_overflow (a);
^~~~~~~~~~~~~~~~~~~~~~
x.cpp:4:3: error: too few arguments to function ‘__builtin_sadd_overflow’
__builtin_sadd_overflow (a);
^~~~~~~~~~~~~~~~~~~~~~~
x.cpp: In function ‘g’:
x.cpp:9:5: error: too few arguments to function ‘f’
f ();
^
x.cpp:1:6: note: declared here
void f (int a)
^
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70884] New: [6 regression] 2nd SRA pass confused by load from constant pool
Date: Fri, 29 Apr 2016 19:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70884
Bug ID: 70884
Summary: [6 regression] 2nd SRA pass confused by load from
constant pool
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ebotcazou at gcc dot gnu.org
Target Milestone: ---
Target: powerpc-linux
Created attachment 38382
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38382&action=edit
Testcase
It's a regression introduced by the enhancement to SRA aimed at scalarizing
loads from the constant pool: when the 2nd pass is run on the results of the
1st pass, things can go astray.
Testcase attached and to compiled with -O -fno-tree-fre, but unfortunately it
requires a specific tuning setup that is only present on PowerPC 32-bit:
Target: powerpc-generic-linux-gnu
Configured with: ../src/configure --enable-languages=ada,c,c++
--enable-dual-exceptions --enable-_cxa_atexit --enable-threads=posix
--with-bugurl=URL:mailto:report@adacore.com --disable-nls
--without-libiconv-prefix --disable-libstdcxx-pch --disable-libada
--enable-checking=release
--with-mpfr=/mystic.a/gnatmail/sandbox/gcc-6/ppc-linux/mpfr_stable/install
--with-gmp=/mystic.a/gnatmail/sandbox/gcc-6/ppc-linux/gmp_stable/install
--with-mpc=/mystic.a/gnatmail/sandbox/gcc-6/ppc-linux/mpc_stable/install
--with-build-time-tools=/mystic.a/gnatmail/sandbox/gcc-6/ppc-linux/gcc/build/buildtools/bin
--prefix=/mystic.a/gnatmail/sandbox/gcc-6/ppc-linux/gcc/pkg
--build=powerpc-generic-linux-gnu
(botcazou@mystic) ~ $ gcc -o t t.c -O -fno-tree-fre
(botcazou@mystic) ~ $ ./t
Aborted
But the problem is clearly visible in the tree dumps with a cross-compiler.
In .108t.cplxlower1:
<bb 2>:
SR.0_6 = *.LC0.a;
MEM[(struct S *)&s1] = SR.0_6;
MEM[(struct S *)&s1 + 4B] = 1;
foo (s1);
s1 ={v} {CLOBBER};
SR.2_4 = *.LC0.a;
MEM[(struct S *)&s2] = SR.2_4;
MEM[(struct S *)&s2 + 4B] = 1;
foo (s2);
s2 ={v} {CLOBBER};
In .109t.sra:
<bb 2>:
SR.0_6 = SR.4_7(D);
MEM[(struct S *)&s1] = SR.0_6;
MEM[(struct S *)&s1 + 4B] = 1;
foo (s1);
s1 ={v} {CLOBBER};
SR.2_4 = SR.4_7(D);
MEM[(struct S *)&s2] = SR.2_4;
MEM[(struct S *)&s2 + 4B] = 1;
foo (s2);
s2 ={v} {CLOBBER};
Note the bogus new (D) thing created by SRA.
>From gcc-bugs-return-523776-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 19:22:38 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Fri, 29 Apr 2016 19:22:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2016-04-29
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Bernd Schmidt from comment #2)
> Can you give me more information what exactly is causing the stall - which
> instructions are affected, and what needs to be done to avoid it?
xorpd %xmm6, %xmm6, %xmm6 <<< Clear %xmm6
vcvtss2sd (%esi,%eax,4), %xmm6, %xmm7
^^^^^^^ This cause SSE register stall.
It should generate
xorpd %xmm6, %xmm6, %xmm6
vcvtss2sd (%esi,%eax,4), %xmm6, %xmm6
>From gcc-bugs-return-523777-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 19:26:13 2016
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Subject: [Bug fortran/67497] data.c sanitizer runtime error: null pointer passed as argument 2, which is declared to never be null
Date: Fri, 29 Apr 2016 19:26:00 -0000
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--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
And in 6.1.0
../../gcc-6.1.0/gcc/fortran/data.c:191:32: runtime error: null pointer passed
as argument 2, which is declared to never be null
>From gcc-bugs-return-523778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 19:31:25 2016
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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'
Date: Fri, 29 Apr 2016 19:31:00 -0000
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--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in gfortran 6.1.0
../../gcc-6.1.0/gcc/fortran/interface.c:2738:33: runtime error: load of value
1818451807, which is not a valid value for type 'expr_t'
>From gcc-bugs-return-523779-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 19:56:42 2016
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Subject: [Bug target/38825] missed optimization: register renaming in unrolled loop
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Steven Bosscher <steven at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Steven Bosscher <steven at gcc dot gnu.org> ---
Confirmed at the time - and then fallen through the cracks?
Richi, alias stuff so maybe something for you to look at again?
>From gcc-bugs-return-523780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 20:14:39 2016
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Subject: [Bug tree-optimization/70884] [6/7 regression] 2nd SRA pass confused by load from constant pool
Date: Fri, 29 Apr 2016 20:14:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu.org
Target Milestone|--- |6.2
Summary|[6 regression] 2nd SRA pass |[6/7 regression] 2nd SRA
|confused by load from |pass confused by load from
|constant pool |constant pool
>From gcc-bugs-return-523781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 20:57:08 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Fri, 29 Apr 2016 20:57:00 -0000
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--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
-mfpmath=sse is needed.
>From gcc-bugs-return-523782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 21:01:36 2016
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From: "gcc at martinien dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70847] [6/7 Regression] exponential time in cp_fold for chained virtual function calls
Date: Fri, 29 Apr 2016 21:01:00 -0000
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Martin Richtarsky <gcc at martinien dot de> changed:
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----------------------------------------------------------------------------
CC| |gcc at martinien dot de
--- Comment #5 from Martin Richtarsky <gcc at martinien dot de> ---
The example here may not show this but it's a pretty big issue when chaining
virtual operator<<, which can quickly produce 10+ chained calls. I ran across
this in a codebase which did not finish to build overnight with gcc 6.1.0 but
takes only 45 min with gcc 5.
>From gcc-bugs-return-523783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 21:18:43 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Fri, 29 Apr 2016 21:18:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ubizjak at gmail dot com
--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
This optimization is implemented with define_peephole2:
commit 01c074df07cc82f1a032d12a786b3109467a2a6b
Author: wmi <wmi@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue Oct 1 23:32:55 2013 +0000
2013-10-01 Wei Mi <wmi@google.com>
* config/i386/x86-tune.def (DEF_TUNE): Remove
m_CORE_ALL.
* config/i386/i386.md: Add define_peephole2 to
break partial reg stall for cvtss2sd/cvtsd2ss.
which is sensitive to regrename. Should it be implemented with
define_split?
>From gcc-bugs-return-523784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 21:26:15 2016
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Subject: [Bug fortran/50410] [4.9/5/6/7 Regression] ICE in record_reference
Date: Fri, 29 Apr 2016 21:26:00 -0000
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--- Comment #22 from Vittorio Zecca <zeccav at gmail dot com> ---
Same ICE in 6.1.0
>From gcc-bugs-return-523785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 21:32:42 2016
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Subject: [Bug fortran/49278] ICE (segfault) when combining DATA with default initialization
Date: Fri, 29 Apr 2016 21:32:00 -0000
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--- Comment #11 from Vittorio Zecca <zeccav at gmail dot com> ---
Same ICE in 6.1.0
>From gcc-bugs-return-523786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 21:46:52 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/67496] trans-array.c sanitizer runtime error: load of value 124, which is not a valid value for type 'bool'
Date: Fri, 29 Apr 2016 21:46:00 -0000
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Sorry, I get the same warning on 6.1.0:
Did you test the patch in comment 1?
> If you had a sanitized version of f951 maybe you could see it by yourself.
The last time I tried, it just failed. Could you give a step by step way to get
it?
>From gcc-bugs-return-523787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Apr 29 21:51:19 2016
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From: "dhowells at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
Date: Fri, 29 Apr 2016 21:51:00 -0000
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--- Comment #13 from dhowells at redhat dot com <dhowells at redhat dot com> ---
Very nice:-)
There are a couple of under optimisations yet. Firstly:
#define BITS_PER_LONG (sizeof(long) * 8)
#define _BITOPS_LONG_SHIFT 6
static __always_inline bool test_and_change_bit(long bit, volatile unsigned
long *ptr)
{
unsigned long mask = 1UL << (bit & (BITS_PER_LONG - 1));
unsigned long old;
ptr += bit >> _BITOPS_LONG_SHIFT;
old = __atomic_fetch_xor(ptr, mask, __ATOMIC_SEQ_CST);
return old & mask;
}
bool change_bit_3(unsigned long *p, long n)
{
return test_and_change_bit(n, p);
}
is compiled to:
0000000000000048 <change_bit_3>:
48: 48 89 f0 mov %rsi,%rax
4b: 83 e6 3f and $0x3f,%esi
4e: 48 c1 f8 06 sar $0x6,%rax
52: f0 48 0f bb 34 c7 lock btc %rsi,(%rdi,%rax,8)
58: 0f 92 c0 setb %al
5b: c3 retq
on x86, lines 48-4e are redundant as the btc instruction will do that for you.
I don't know whether it's more efficient this way or not, though.
Secondly:
static __always_inline bool test_bit(long bit, const unsigned long *ptr)
{
unsigned long mask = 1UL << (bit & (BITS_PER_LONG - 1));
unsigned long old;
ptr += bit >> _BITOPS_LONG_SHIFT;
old = __atomic_load_n(ptr, __ATOMIC_RELAXED);
return old & mask;
}
bool read_bit(unsigned long *p)
{
return test_bit(3, p);
}
is compiled to:
0000000000000000 <read_bit>:
0: 48 8b 07 mov (%rdi),%rax
3: 48 c1 e8 03 shr $0x3,%rax
7: 83 e0 01 and $0x1,%eax
a: c3 retq
but could actually be either a TEST instruction or a BT instruction.
Still, thanks very much for looking at this!
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
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--- Comment #14 from dhowells at redhat dot com <dhowells at redhat dot com> ---
Okay, I built and booted an x86_64 kernel that had the XXX_bit() and
test_and_XXX_bit() ops altered to use __atomic_fetch_YYY() funcs. The core
kernel ended up ~8K larger in the .text segment. Examining ext4_resize_begin()
as an example, this statement:
if (test_and_set_bit_lock(EXT4_RESIZING, &EXT4_SB(sb)->s_resize_flags))
ret = -EBUSY;
looks like this in the unpatched kernel:
0xffffffff812169f3 <+122>: lock btsl $0x0,0x3b8(%rax)
0xffffffff812169fc <+131>: jb 0xffffffff81216a02
0xffffffff812169fe <+133>: xor %edx,%edx
0xffffffff81216a00 <+135>: jmp 0xffffffff81216a07
0xffffffff81216a02 <+137>: mov $0xfffffff0,%edx
0xffffffff81216a07 <+142>: mov %edx,%eax
and like this in the patched kernel:
0xffffffff81217414 <+122>: xor %edx,%edx
0xffffffff81217416 <+124>: lock btsq $0x0,0x3b8(%rax)
0xffffffff81217420 <+134>: setb %dl
0xffffffff81217423 <+137>: neg %edx
0xffffffff81217425 <+139>: and $0xfffffff0,%edx
0xffffffff81217428 <+142>: mov %edx,%eax
So it looks good here at least:-)
This also suggests there's an error in the current x86_64 kernel implementation
as the kernel bitops are supposed to operate on machine word-size locations, so
it should be using BTSQ not BTSL - which would make the __atomic_fetch_or()
variant a byte shorter - and involving no conditional jumps.
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Subject: [Bug c/70883] inconsistent error message for calls to __builtin_add_overflow with too few arguments
Date: Fri, 29 Apr 2016 23:37:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-04-29
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Since making the text of the diagnostic consistent is trivial I've included it
in my patch for bug 70507 that I'm about to submit for review.
>From gcc-bugs-return-523790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 00:01:42 2016
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Subject: [Bug c++/66644] Rejects C++11 in-class anonymous union members initialization
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--- Comment #5 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Sat Apr 30 00:00:51 2016
New Revision: 235662
URL: https://gcc.gnu.org/viewcvs?rev=235662&root=gcc&view=rev
Log:
/cp
2016-04-29 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/66644
* class.c (check_field_decl): Remove final int* parameter, change
the return type to bool; fix logic in order not to reject multiple
initialized fields in anonymous struct.
(check_field_decls): Adjust call.
/testsuite
2016-04-29 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/66644
* g++.dg/cpp0x/nsdmi-anon-struct1.C: New.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/nsdmi-anon-struct1.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/class.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/66644] Rejects C++11 in-class anonymous union members initialization
Date: Sat, 30 Apr 2016 00:03:00 -0000
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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 |7.0
--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed in trunk.
>From gcc-bugs-return-523792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 00:35:02 2016
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Subject: [Bug target/69645] powerpc -ffixed-<reg> ignored when saving and restoring regs
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--- Comment #2 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Sat Apr 30 00:34:16 2016
New Revision: 235670
URL: https://gcc.gnu.org/viewcvs?rev=235670&root=gcc&view=rev
Log:
[RS6000] PR69645, -ffixed-reg ignored
Treat -ffixed-reg as we do for global asm regs.
PR target/69645
* config/rs6000/rs6000.c (fixed_reg_p): New function.
(fixed_regs_p): Rename from global_regs_p. Call fixed_reg_p.
Update all uses.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
>From gcc-bugs-return-523793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 00:37:44 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Sat, 30 Apr 2016 00:37:00 -0000
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Bernd Schmidt <bernds at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
So the problem seems to be peep2 runs before regrename. If you always want to
generate two instructions there, then yes, a splitter would probably be better.
Actually just changing define_peephole2 to define_split seems to do the trick,
can you try whether that fixes the performance regression (I don't have a
Haswell machine)?
>From gcc-bugs-return-523794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 00:43:52 2016
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Subject: [Bug fortran/67496] trans-array.c sanitizer runtime error: load of value 124, which is not a valid value for type 'bool'
Date: Sat, 30 Apr 2016 00:43:00 -0000
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--- Comment #5 from Vittorio Zecca <zeccav at gmail dot com> ---
Yes, I did test your patch, but nothing changed.
I understand you tried to generate a sanitized version of f951 but the
process failed.
I did the following (approximately):
CFLAGS="-fsanitize=undefined -Og -ggdb -fno-omit-frame-pointer
-L/home/vitti/local/gcc-6.1.0/lib64" CXXFLAGS="-fsanitize=undefined
-Og -ggdb -fno-omit-frame-pointer"
LDFLAGS="-L/home/vitti/local/gcc-6.1.0/lib64 -lubsan -ldl -lpthread"
../gcc-6.1.0/configure --prefix=/home/vitti/local/gcc-6.1.0-undefined
--disable-multilib --enable-languages=c,c++,fortran
--disable-libstdcxx --disable-bootstrap
make
and cross fingers
With an analogous approach I got a -fsanitize=address version of
gcc/g++/gfortran
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70885] New: [SH] Use MSB pointer-tagging for pointer-to-member representation
Date: Sat, 30 Apr 2016 02:13:00 -0000
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Bug ID: 70885
Summary: [SH] Use MSB pointer-tagging for pointer-to-member
representation
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Currently there are two available pointer-to-member representation options:
ptrmemfunc_vbit_in_pfn,
ptrmemfunc_vbit_in_delta
where ptrmemfunc_vbit_in_pfn stores the "is a virtual function" pointer tag in
the LSB of the pointer (assuming 16-bit aligned functions).
When using the tagged pointer to make the function call, the tag needs to be
tested and the pointer converted into a valid address. On SH this currently
looks like this:
struct test_class
{
int x;
void func (void);
};
void test (test_class* c, void (test_class::*f)(void) )
{
(c->*f) ();
}
compiled with -O2:
mov r5,r0 // r5 = r0 = __pfn field
tst #1,r0 // test LSB
add r6,r4
bt .L17 // if LSB not set, goto L17
mov.l @r4,r5 // when here, LSB is set
add r5,r0
add #-1,r0 // subtract 1 to clear LSB
mov.l @r0,r0
.L17:
jmp @r0
nop
At least on SH, it's better to do store pointer tags in the MSB. So that the
tagged pointer value becomes:
tagged_ptr_val = (ptr_val >> 1) | (tag_bit << 31)
This allows for more efficient tag test and pointer value restoration, the code
could look like:
mov r5,r0
shll r5 // __pfn << 1, MSB -> T bit
add r6,r4
bf .L17 // if MSB not set, goto L17
mov.l @r4,r5
add r5,r0
mov.l @r0,r0
.L17:
jmp @r0
nop
... which saves one instruction.
To enable that, there should be another option "ptrmemfunc_vbit_in_pfn_msb"
along with some target specific m-option to enable this as well as a configure
option to control the default setting.
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Subject: [Bug target/63321] [SH] Unused T bit result of shll / shlr insns
Date: Sat, 30 Apr 2016 02:49:00 -0000
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--- Comment #8 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #1)
>
> void test2_2 (unsigned int x, unsigned int* y)
> {
> unsigned int xx = x >> 1;
> unsigned int p = x & 1;
> if (p != 0)
> foo (xx);
> }
>
And of course also in the opposite direction:
void test4_2 (unsigned int x)
{
if (x & (1 << 31))
((void(*)(void))(x << 1)) ();
}
>From gcc-bugs-return-523797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 02:58:10 2016
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/70879] Missed jump threading opportunity with multiple != conditions
Date: Sat, 30 Apr 2016 02:58:00 -0000
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Jeffrey A. Law <law at redhat dot com> changed:
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----------------------------------------------------------------------------
CC| |amacleod at redhat dot com
--- Comment #1 from Jeffrey A. Law <law at redhat dot com> ---
Andrew, thought this might be of interest... Look at bb3...
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Subject: [Bug target/69645] powerpc -ffixed-<reg> ignored when saving and restoring regs
Date: Sat, 30 Apr 2016 03:34:00 -0000
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Alan Modra <amodra at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Alan Modra <amodra at gmail dot com> ---
Fixed mainline
>From gcc-bugs-return-523799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 05:21:53 2016
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Subject: [Bug middle-end/64327] ../../gcc/gcc/rtlanal.c:4881:48: runtime error: shift exponent 4294967295 is too large for 64-bit type 'long unsigned int'
Date: Sat, 30 Apr 2016 05:21:00 -0000
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--- Comment #7 from Vittorio Zecca <zeccav at gmail dot com> ---
On 6.1.0 I applied the same patch I suggested on comment 6,
this time at line 5187,
and the runtime error disappeared.
>From gcc-bugs-return-523800-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 07:26:02 2016
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Subject: [Bug tree-optimization/70884] [6/7 regression] 2nd SRA pass confused by load from constant pool
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #38382|0 |1
is obsolete| |
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Created attachment 38383
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38383&action=edit
More correct testcase
The original one probably has undefined behavior in ISO C.
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Subject: [Bug rtl-optimization/70886] New: -frename-registers causes boostrap comparison failures on ia64
Date: Sat, 30 Apr 2016 07:50:00 -0000
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Bug ID: 70886
Summary: -frename-registers causes boostrap comparison failures
on ia64
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: build
Severity: normal
Priority: P3
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Target: ia64-*-*
Since -frename-registers was enabled by default with -O2 there are boostrap
comparison failures on ia64.
Bootstrap comparison failure!
gcc/ada/sem_ch12.o differs
gcc/ada/scos.o differs
The differences are rather complex, but may be equivalent.
>From gcc-bugs-return-523802-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 10:03:41 2016
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Subject: [Bug rtl-optimization/70886] -frename-registers causes boostrap comparison failures on ia64
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Andreas Schwab <schwab@linux-m68k.org> changed:
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----------------------------------------------------------------------------
Keywords| |wrong-code
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
In revision 235672 the stage2 compile is now crashing, so this is a wrong-code
bug.
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Subject: [Bug rtl-optimization/70886] -frename-registers causes boostrap comparison failures on ia64
Date: Sat, 30 Apr 2016 10:58:00 -0000
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--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
No, the crash isn't related to -frename-registers.
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From: "zoidbergx at tlen dot pl" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70887] New: internal compiler error in trunc_int_for_mode, at explow.c:78
Date: Sat, 30 Apr 2016 11:04:00 -0000
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Bug ID: 70887
Summary: internal compiler error in trunc_int_for_mode, at
explow.c:78
Product: gcc
Version: 5.3.0
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"g++-5 -v" output:
Using built-in specs.
COLLECT_GCC=g++
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
5.3.0-3ubuntu1~14.04' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,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=gcc4-compatible --disable-libstdcxx-dual-abi
--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 5.3.0 20151204 (Ubuntu 5.3.0-3ubuntu1~14.04)
command line:
g++-5 -std=c++11 -march=haswell -Ofast main.cpp
compiler output:
main.cpp: In function ‘int main(int, char**)’:
main.cpp:82:1: internal compiler error: in trunc_int_for_mode, at explow.c:78
}
^
0x81b350 trunc_int_for_mode(long, machine_mode)
../../src/gcc/explow.c:77
0x81248a gen_int_mode(long, machine_mode)
../../src/gcc/emit-rtl.c:497
0x81248a immed_wide_int_const(generic_wide_int<wide_int_ref_storage<false> >
const&, machine_mode)
../../src/gcc/emit-rtl.c:612
0xa75a9b simplify_const_unary_operation(rtx_code, machine_mode, rtx_def*,
machine_mode)
../../src/gcc/simplify-rtx.c:1764
0xa7357a simplify_unary_operation(rtx_code, machine_mode, rtx_def*,
machine_mode)
../../src/gcc/simplify-rtx.c:843
0xf51f9a combine_simplify_rtx
../../src/gcc/combine.c:5573
0xf54463 subst
../../src/gcc/combine.c:5424
0xf540c8 subst
../../src/gcc/combine.c:5369
0xf540c8 subst
../../src/gcc/combine.c:5369
0xf540c8 subst
../../src/gcc/combine.c:5369
0xf540c8 subst
../../src/gcc/combine.c:5369
0xf557a1 try_combine
../../src/gcc/combine.c:3346
0xf5b30e combine_instructions
../../src/gcc/combine.c:1473
0xf5b30e rest_of_handle_combine
../../src/gcc/combine.c:14204
0xf5b30e execute
../../src/gcc/combine.c:14247
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-5/README.Bugs> for instructions.
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Subject: [Bug c++/70887] internal compiler error in trunc_int_for_mode, at explow.c:78
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--- Comment #1 from zoidbergx at tlen dot pl ---
Created attachment 38384
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38384&action=edit
source file
Preprocessed file, obtained with "-save-temps" option is too big (size =
1331314 bytes)
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Subject: [Bug c++/70887] internal compiler error in trunc_int_for_mode, at explow.c:78
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to zoidbergx from comment #1)
> Created attachment 38384 [details]
> source file
>
> Preprocessed file, obtained with "-save-temps" option is too big (size =
> 1331314 bytes)
Please attach the compressed preprocessed file.
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Subject: [Bug middle-end/67485] expmed.c sanitizer detects overflow
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--- Comment #1 from Vittorio Zecca <zeccav at gmail dot com> ---
Still in 6.1.0 at line 3162 of expmed.c
"val_so_far -= (HOST_WIDE_INT) 1 << log;"
../../gcc-6.1.0/gcc/expmed.c:3162:42: runtime error: signed integer overflow:
-9223372036854775808 - 1 cannot be represented in type 'long int'
>From gcc-bugs-return-523808-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 11:54:46 2016
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Subject: [Bug other/69412] bootstrap-ubsan profiledbootstrap issues
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Vittorio Zecca <zeccav at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |zeccav at gmail dot com
--- Comment #3 from Vittorio Zecca <zeccav at gmail dot com> ---
On 6.1.0 I am having the same runtime error at parser.c:765
"gcc_assert (tp != lexer->buffer->address ());"
>From gcc-bugs-return-523809-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 12:15:45 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70848] [6/7 Regression] g++ arm-none-eabi ignores volatile qualifier
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prathamesh3492 at gcc dot gnu.org changed:
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--- Comment #11 from prathamesh3492 at gcc dot gnu.org ---
(In reply to ktkachov from comment #10)
> (In reply to Richard Biener from comment #8)
> > With an old cross to arm I can indeed see (.018t.ssa):
> >
> > void test() ()
> > {
> > volatile int * _1;
> > volatile int * _4;
> > volatile int * _6;
> >
> > <bb 2>:
> > _1 = 327221280B;
> > *_1 = 97;
> > _4 = 327221280B;
> > *_4 = 98;
> > _6 = 327221280B;
> > *_6 = 99;
> > return;
> >
> >
> > note the missing {v} at the assignments.
>
> I wonder why this doesn't happen on x86 or aarch64...
> Is there some target hook called that erroneously strips the 'volatility'
> from the type somewhere?
Hi,
I could reproduce the issue on x86_64 with g++ as of r235554.
Dump of 018t.ssa compiled with g++ -O2:
(also same for aarch64)
;; Function void test() (_Z4testv, funcdef_no=0, decl_uid=2253, cgraph_uid=0,
symbol_order=1)
void test() ()
{
volatile int * p.0_2;
volatile int * p.0_4;
volatile int * p.0_6;
<bb 2>:
p.0_2 = p;
*p.0_2 = 97;
p.0_4 = p;
*p.0_4 = 98;
p.0_6 = p;
*p.0_6 = 99;
return;
}
and generated asm for test:
_Z4testv:
.LFB0:
.cfi_startproc
movq p(%rip), %rax
movl $99, (%rax)
ret
.cfi_endproc
which I suppose is wrong since it avoids stores of 97 and 98 to *p.
With C FE, the ssa dump is as follows:
;; Function test (test, funcdef_no=0, decl_uid=1756, cgraph_uid=0,
symbol_order=1)
test ()
{
volatile int * p.0_2;
volatile int * p.0_4;
volatile int * p.0_6;
<bb 2>:
p.0_2 = p;
*p.0_2 ={v} 97;
p.0_4 = p;
*p.0_4 ={v} 98;
p.0_6 = p;
*p.0_6 ={v} 99;
return;
}
generated asm with C FE:
test:
.LFB0:
.cfi_startproc
movq p(%rip), %rax
movl $97, (%rax)
movl $98, (%rax)
movl $99, (%rax)
ret
.cfi_endproc
So it perhaps appears to be a C++FE issue with gimplification ?
Thanks,
Prathamesh
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Subject: [Bug rtl-optimization/70886] -frename-registers causes boostrap comparison failures on ia64
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
I can reproduce the comparison failure. I think that the wrong code is another
issue and comes from Alan's changes to the RA, so let's distinguish them.
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Subject: [Bug other/69412] bootstrap-ubsan profiledbootstrap issues
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--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
A reproducer for the parser.c runtime error
/* gcc-6.1.0-undefined/bin/g++ -I../../gcc-6.1.0/gcc/.
-I../../gcc-6.1.0/gcc/../include -I../../gcc-6.1.0/gcc/../libcpp/include p.c
-S -I. */
/* ../../gcc-6.1.0/gcc/cp/parser.c:765:7: runtime error: member call on null
pointer of type 'struct vec' */
/* must be compiled in gcc-6.1.0/gcc directory */
#include "config.h"
#include "system.h"
#include "coretypes.h"
template <class T>
class function_summary {};
template <class T>
class function_summary <T *>
{
template<typename Arg, bool (*f)(const T &, Arg)>
void traverse (Arg a) const
{
m_map.traverse <f> (a);/* HERE */
}
typedef int_hash <int, 0, -1> map_hash;
hash_map <map_hash, T *> m_map;
};
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Subject: [Bug target/53949] [SH] Add support for mac.w / mac.l instructions
Date: Sat, 30 Apr 2016 14:02:00 -0000
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--- Comment #15 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Maybe the standard name patterns sdot_prod for 16 bit and 32 bit int vectors
could be implemented using the mac.w and mac.l insns, if the input vectors are
somehow put in memory.
>From gcc-bugs-return-523813-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 14:04:02 2016
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Subject: [Bug rtl-optimization/70886] -frename-registers causes boostrap comparison failures on ia64
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |ebotcazou at gcc dot gnu.org
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Investigating.
>From gcc-bugs-return-523814-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 14:41:36 2016
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Subject: [Bug c++/70887] internal compiler error in trunc_int_for_mode, at explow.c:78
Date: Sat, 30 Apr 2016 14:41:00 -0000
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--- Comment #3 from zoidbergx at tlen dot pl ---
Created attachment 38385
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38385&action=edit
preprocessed source file (compressed)
>From gcc-bugs-return-523815-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 14:43:21 2016
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Subject: [Bug fortran/67496] trans-array.c sanitizer runtime error: load of value 124, which is not a valid value for type 'bool'
Date: Sat, 30 Apr 2016 14:43:00 -0000
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I finally managed to build gcc with -fsanitize=undefined:
Using built-in specs.
COLLECT_GCC=gfcg
COLLECT_LTO_WRAPPER=/opt/gcc/gcc7g/libexec/gcc/x86_64-apple-darwin15.4.0/7.0.0/lto-wrapper
Target: x86_64-apple-darwin15.4.0
Configured with: ../work/configure --prefix=/opt/gcc/gcc7g
--enable-languages=c,c++,fortran --with-gmp=/opt/mp-new --with-system-zlib
--with-isl=/opt/mp-new --disable-bootstrap --disable-multilib
--disable-libstdcxx CFLAGS='-L/opt/gcc/gcc7a/lib -lubsan -fsanitize=undefined
-Og -g -fno-omit-frame-pointer' CXXFLAGS='-fsanitize=undefined -Og -g
-fno-omit-frame-pointer' LDFLAGS='-L/opt/gcc/gcc7a/lib -lubsan -ldl -lpthread'
: (reconfigured) ../work/configure --prefix=/opt/gcc/gcc7g
--with-gmp=/opt/mp-new --with-system-zlib --with-isl=/opt/mp-new
--disable-bootstrap --disable-multilib --disable-libstdcxx
CFLAGS='-L/opt/gcc/gcc7a/lib -lubsan -fsanitize=undefined -Og -g
-fno-omit-frame-pointer' CXXFLAGS='-fsanitize=undefined -Og -g
-fno-omit-frame-pointer' LDFLAGS='-L/opt/gcc/gcc7a/lib -lubsan -ldl -lpthread'
--enable-languages=c,c++,fortran --no-create --no-recursion
Thread model: posix
gcc version 7.0.0 20160430 (experimental) [trunk revision 235678p25] (GCC)
where gcc7a is
Using built-in specs.
COLLECT_GCC=gfca
COLLECT_LTO_WRAPPER=/opt/gcc/gcc7a/libexec/gcc/x86_64-apple-darwin15.4.0/7.0.0/lto-wrapper
Target: x86_64-apple-darwin15.4.0
Configured with: ../_clean/configure --prefix=/opt/gcc/gcc7a
--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
Thread model: posix
gcc version 7.0.0 20160429 (experimental) [trunk revision 235619] (GCC)
I have tried several variants of
typespec_chararray_ctor = (expr->ts.u.cl
&& expr->ts.u.cl->length_from_typespec);
without any progress. Are we sure that the problem is in gfortran and not in
ubsan?
>From gcc-bugs-return-523816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 14:57:53 2016
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Subject: [Bug middle-end/70887] [5 Regression] internal compiler error in trunc_int_for_mode, at explow.c:78
Date: Sat, 30 Apr 2016 14:57:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
Component|c++ |middle-end
Summary|internal compiler error in |[5 Regression] internal
|trunc_int_for_mode, at |compiler error in
|explow.c:78 |trunc_int_for_mode, at
| |explow.c:78
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
trippels@gcc75 ~ % cat main.ii
typedef long long __m128i __attribute__((__vector_size__(16)));
enum RangeID { RANGE_2 };
template <RangeID> struct C { static constexpr int value = 10; };
__m128i _mm_set1_epi32(int __A) {
int __q0 = __A;
return __m128i{__q0};
}
__inline __m128i _mm_bsrli_si128(__m128i __A, int __N) {
return __builtin_ia32_psrldqi128(__A, __N * 8);
}
__m128i _mm_bslli_si128(__m128i __A) {
return __builtin_ia32_pslldqi128(__A, 8);
}
__m128i _mm_or_si128(__m128i __A, __m128i __B) { return __A | __B; }
template <typename RangeID, template <RangeID> class Range, RangeID...
rangeIds>
struct A {
template <int, RangeID...> struct B;
template <int nPrevValues, RangeID rangeId, RangeID... restRangeIds>
struct B<nPrevValues, rangeId, restRangeIds...> {
static constexpr int nValues = Range<rangeId>::value;
static __m128i generate() {
__attribute__((__vector_size__(
2 * sizeof(long)))) long long __trans_tmp_1 = generate(),
prevRanges =
_mm_bslli_si128(__trans_tmp_1),
newRange = _mm_bsrli_si128(
_mm_set1_epi32(nValues), 12);
return _mm_or_si128(prevRanges, newRange);
}
};
A() { B<0, rangeIds...>::generate(); }
};
main() {
using RI = A<RangeID, C, RANGE_2>;
RI ri;
}
trippels@gcc75 ~ % g++ -std=c++11 -O2 main.ii
main.ii: In static member function ‘static __m128i A<RangeID, Range,
rangeIds>::B<nPrevValues, rangeId, restRangeIds ...>::generate() [with int
nPrevValues = 0; RangeID rangeId = (RangeID)0u; RangeID ...restRangeIds = {};
RangeID = RangeID; Range = C; RangeID ...rangeIds = {(RangeID)0u}; __m128i =
__vector(2) long long int]’:
main.ii:29:5: internal compiler error: in trunc_int_for_mode, at explow.c:78
>From gcc-bugs-return-523817-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 15:04:42 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/67496] trans-array.c sanitizer runtime error: load of value 124, which is not a valid value for type 'bool'
Date: Sat, 30 Apr 2016 15:04:00 -0000
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--- Comment #7 from Vittorio Zecca <zeccav at gmail dot com> ---
I understand that you are still seeing a message like this
../../gcc-6.1.0/gcc/fortran/trans-array.c:2233:27: runtime error: load
of value 176, which is not a valid value for type 'bool'
right?
If yes, the problem might well be in ubsan, unless it has been fixed in 7.0.0.
I'll look into this.
>From gcc-bugs-return-523818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 16:06:54 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/67496] trans-array.c sanitizer runtime error: load of value 124, which is not a valid value for type 'bool'
Date: Sat, 30 Apr 2016 16:06:00 -0000
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--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> If yes, the problem might well be in ubsan, unless it has been fixed
> in 7.0.0. I'll look into this.
I have instrumented the trunk (7.0) and indeed the bug has not been fixed.
Although my understanding of C is quite shallow, I cannot see what's wrong with
the gfortran code, hence my question about a false positive.
>From gcc-bugs-return-523819-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 16:10:40 2016
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Subject: [Bug fortran/49278] ICE (segfault) when combining DATA with default initialization
Date: Sat, 30 Apr 2016 16:10:00 -0000
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--- Comment #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The ICE is gone with the patch in comment 2, however I get at run time
../../../work/libgcc/config/i386/cpuinfo.c:346:17: runtime error: left shift of
1 by 31 places cannot be represented in type 'int'
(instrumented trunk).
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From: "milicic at math dot utah.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/70346] [libvtv] 6.0-20160313 build succeeds, install fails: cannot stat '.libs/libvtv.a': No such file or directory
Date: Sat, 30 Apr 2016 16:53:00 -0000
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--- Comment #4 from milicic at math dot utah.edu ---
I see the same bug compiling released version of gcc-6.1.0 on Sun Ultra
27 running Solaris 11.3 x86 with Oracle supplied GNU make 3.82 and
gcc-4.8.2.
Dragan
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Subject: [Bug other/70346] [libvtv] 6.1.0 build succeeds, install fails: cannot stat '.libs/libvtv.a': No such file or directory
Date: Sat, 30 Apr 2016 16:57:00 -0000
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Andrew Paprocki <andrew at ishiboo dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|6.0 |6.1.0
Summary|[libvtv] 6.0-20160313 build |[libvtv] 6.1.0 build
|succeeds, install fails: |succeeds, install fails:
|cannot stat |cannot stat
|'.libs/libvtv.a': No such |'.libs/libvtv.a': No such
|file or directory |file or directory
--- Comment #5 from Andrew Paprocki <andrew at ishiboo dot com> ---
Updating title/version to indicate 6.1.0 release. I got this in the 6.0 builds
and also see it in the 6.1.0 release.
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Subject: [Bug fortran/67496] trans-array.c sanitizer runtime error: load of value 124, which is not a valid value for type 'bool'
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--- Comment #9 from Vittorio Zecca <zeccav at gmail dot com> ---
My C is not better than yours, but length_from_typespec might have
been incorrectly
initialized elsewhere, otherwise it is a false positive.
>From gcc-bugs-return-523823-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 17:15:34 2016
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Subject: [Bug fortran/49278] ICE (segfault) when combining DATA with default initialization
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--- Comment #13 from Vittorio Zecca <zeccav at gmail dot com> ---
I think that 1 << 31 is undefined because "1" is assumed (signed) int.
Maybe it should be 1u << 31 ?
Anyway on 6.1.0 I have no runtime error message.
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Subject: [Bug driver/14435] [4.9/5/6/7 Regression] gnatchop cannot use the compiled compiler in Ada's testsuite because of changed GCC_EXEC_PREFIX semantics
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |ebotcazou at gcc dot gnu.org
Resolution|--- |FIXED
Target Milestone|4.9.4 |7.0
--- Comment #39 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixed by r235678.
>From gcc-bugs-return-523825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 19:11:12 2016
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Subject: [Bug fortran/49278] ICE (segfault) when combining DATA with default initialization
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--- Comment #14 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I think that 1 << 31 is undefined because "1" is assumed (signed) int.
> Maybe it should be 1u << 31 ?
I have tried it, but it does not work.
> Anyway on 6.1.0 I have no runtime error message.
This due to
#define bit_AVX512VL unsigned (1 << 31)
in gcc/config/i386/cpuid.h. AFAICT it is also present for gcc-6.
>From gcc-bugs-return-523826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 19:16:47 2016
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Subject: [Bug fortran/67496] trans-array.c sanitizer runtime error: load of value 124, which is not a valid value for type 'bool'
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--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> My C is not better than yours, but length_from_typespec might have
> been incorrectly initialized elsewhere, otherwise it is a false positive.
I see
(lldb) p expr->ts.u.cl->length_from_typespec
(bool) $1 = true
(lldb) p (expr->ts.u.cl && expr->ts.u.cl->length_from_typespec)
(bool) $2 = false
>From gcc-bugs-return-523827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Apr 30 20:39:59 2016
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Subject: [Bug bootstrap/62077] --with-build-config=bootstrap-lto fails
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--- Comment #67 from Sven C. Dack <sven.c.dack at virginmedia dot com> ---
(In reply to Richard Biener from comment #66)
> The issue re-appears with GCC 6, the workaround doing
> --enable-stage1-checking=release still works.
>
> Note that the comparison we do with LTO bootstrap is quite pointless as we
> only compile the internal IL at LTO streaming time but not the final result
> of optimization. For that we'd need to compare cc1, cc1plus, etc. itself.
To call it pointless is as dismissive of the effort as saying you'd be willing
to accept any indeterministic behaviour, including magic, into computer science
as long as it produces great software. Let's not be this lazy.
I believe there is still much to be had from a comparison in between the stages
and of all that can be determined. This particular case here may not have
revealed a serious issue. However, it makes it only a fortunate case, but it's
not a reason to welcome indetermination and luck into GCC's development or to
dismiss a good concept. I'd rather fear that in doing so you'd lose further
support from the scientific community.
Anyhow, this is my opinion. I should in fact not be getting any e-mails on this
report - I have excluded myself from the list some time ago - and yet did I did
get the mail.
> So a fix would be to make the comparison configurable to a tri-stage
> { object-files, binaries, off } where a boostrap with comparison off
> can also omit building stage3 but still get the benefit of building
> GCC with itself and not the host compiler.
>
> Comparing the binaries is generally slower of course.
>From gcc-bugs-return-523828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 00:10:08 2016
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70888
Bug ID: 70888
Summary: #pragma diagnostic ignored -Wlong-long ineffective
with __LONG_LONG_MAX__ in c++98 mode
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
In C++ 98 mode, #pragma GCC diagnostic ignored "-Wlong-long" has no effect.
The pragma works as expected in C89 mode.
$ cat u.cpp && /home/msebor/build/gcc-66561/gcc/xgcc
-B/home/msebor/build/gcc-66561/gcc -S -Wall -Wextra -Wpedantic -std=c++98 -xc++
u.cpp
void f ()
{
#pragma GCC diagnostic ignored "-Wlong-long"
long long x = __LONG_LONG_MAX__;
}
u.cpp:5:19: warning: use of C++11 long long integer constant [-Wlong-long]
long long x = __LONG_LONG_MAX__;
^
u.cpp: In function ‘void f()’:
u.cpp:5:15: warning: unused variable ‘x’ [-Wunused-variable]
long long x = __LONG_LONG_MAX__;
^
>From gcc-bugs-return-523829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 04:01:58 2016
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From: "lucenadeveloper at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/70889] New: memory reordering across loads tagged as memory_order_seq_cst
Date: Sun, 01 May 2016 04:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70889
Bug ID: 70889
Summary: memory reordering across loads tagged as
memory_order_seq_cst
Product: gcc
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Priority: P3
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Based on my stackoverflow question here,
http://stackoverflow.com/questions/36958372/gcc-reordering-up-across-load-with-memory-order-seq-cst-is-this-allowed,
the RTL optimization stage reorders a nonatomic load up across a load tagged
with memory_order_seq_cst. This violates some synchronizes-with relationships
that should be established between reader and writer threads and breaks many
synchronization primitives such as seqlocks.
Further, this only occurs if the load in question is under 123 bytes. Anything
>= 123 does not get reordered.
>From gcc-bugs-return-523830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 06:05:56 2016
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70700] ICE using -fdump-tree-all-graph option
Date: Sun, 01 May 2016 06:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70700
vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #7 from vries at gcc dot gnu.org ---
(In reply to Marek Polacek from comment #6)
> Could be just
>
> --- a/gcc/tree-ssa-structalias.c
> +++ b/gcc/tree-ssa-structalias.c
> @@ -2241,7 +2241,11 @@ dump_pred_graph (struct scc_info *si, FILE *file)
> if (graph->points_to[i]
> && !bitmap_empty_p (graph->points_to[i]))
> {
> - fprintf (file, "[label=\"%s = {", get_varinfo (i)->name);
> + if (i < FIRST_REF_NODE)
> + fprintf (file, "[label=\"%s = {", get_varinfo (i)->name);
> + else
> + fprintf (file, "[label=\"*%s = {",
> + get_varinfo (i - FIRST_REF_NODE)->name);
> unsigned j;
> bitmap_iterator bi;
> EXECUTE_IF_SET_IN_BITMAP (graph->points_to[i], 0, j, bi)
>
> but someone would need to check whether we still print a correct info with
> this.
I've build the compiler with the patch, compiled the example from comment 4,
extracted the dot files using the script mentioned in PR70221 and generated pdf
files from those. They look ok to me.
Also, the patch itself looks good to me.
>From gcc-bugs-return-523831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 06:15:38 2016
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Subject: [Bug tree-optimization/70700] ICE using -fdump-tree-all-graph option
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--- Comment #8 from vries at gcc dot gnu.org ---
Created attachment 38386
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38386&action=edit
proposed patch
Patch with testcase included. I'll put this through testing.
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70890] New: [7 regression] r235660 miscompiles stage2 compiler on ia64
Date: Sun, 01 May 2016 07:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70890
Bug ID: 70890
Summary: [7 regression] r235660 miscompiles stage2 compiler on
ia64
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
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CC: amodra at gmail dot com
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Target: ia64-*-*
Starting program: /usr/local/gcc/gcc-20160501/Build/gcc/cc1 -fpreprocessed
libgcc2.i -quiet -O2 -fbuilding-libgcc -fno-stack-protector -fPIC
-fvisibility=hidden
Failed to read a valid object file image from memory.
Program received signal SIGSEGV, Segmentation fault.
0x4000000000ed2911 in hash_table<uid_decl_hasher,
xcallocator>::find_with_hash(tree_node* const&, unsigned int) ()
(gdb) bt
#0 0x4000000000ed2911 in hash_table<uid_decl_hasher,
xcallocator>::find_with_hash(tree_node* const&, unsigned int) ()
#1 0x4000000000ec7d60 in analyze_all_variable_accesses() ()
#2 0x4000000000eca0f0 in perform_intra_sra() ()
#3 0x4000000000b085e0 in execute_one_pass(opt_pass*) ()
#4 0x4000000000b094c0 in execute_pass_list_1(opt_pass*) ()
#5 0x4000000000b09510 in execute_pass_list_1(opt_pass*) ()
#6 0x4000000000b09630 in execute_pass_list(function*, opt_pass*) ()
#7 0x4000000000b05140 in do_per_function_toporder(void (*)(function*, void*),
void*) ()
#8 0x4000000000b0aa10 in execute_ipa_pass_list(opt_pass*) ()
#9 0x400000000049a6e0 in symbol_table::compile() [clone .part.45] ()
#10 0x40000000004a0310 in symbol_table::finalize_compilation_unit() ()
#11 0x4000000000cef1c0 in compile_file() ()
#12 0x400000000019f590 in toplev::main(int, char**) ()
#13 0x40000000001a3850 in main ()
(gdb) x/i $pc
=> 0x4000000000ed2911
<_ZN10hash_tableI15uid_decl_hasher11xcallocatorE14find_with_hashERKP9tree_nodej+17>:
ld8 r10=[r32]
(gdb) i reg r32
r32 0xffffffffffffffff -1
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Subject: [Bug rtl-optimization/70890] [7 regression] r235660 miscompiles stage2 compiler on ia64
Date: Sun, 01 May 2016 08:56:00 -0000
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
Program received signal SIGSEGV, Segmentation fault.
hash_table<uid_decl_hasher, xcallocator>::find_with_hash (this=0x80,
comparable=@0x600ffffffffeef10: 0x600ffffffffeee30, hash=5673)
at ../../gcc/hash-table.h:825
825 value_type *entry = &m_entries[index];
(gdb) bt
#0 hash_table<uid_decl_hasher, xcallocator>::find_with_hash (this=0x80,
comparable=@0x600ffffffffeef10: 0x600ffffffffeee30, hash=5673)
at ../../gcc/hash-table.h:825
#1 0x400000000124bee0 in candidate (uid=5673) at ../../gcc/tree-sra.c:324
#2 analyze_all_variable_accesses () at ../../gcc/tree-sra.c:2682
#3 0x400000000124dd70 in perform_intra_sra () at ../../gcc/tree-sra.c:3734
#4 0x4000000000dc4de0 in execute_one_pass (pass=0x600000000028d250)
at ../../gcc/passes.c:2348
#5 0x4000000000dc5e80 in execute_pass_list_1 (pass=0x600000000028d250)
at ../../gcc/passes.c:2432
#6 0x4000000000dc5ed0 in execute_pass_list_1 (pass=0x600000000028d050)
at ../../gcc/passes.c:2433
#7 0x4000000000dc5ff0 in execute_pass_list (fn=0x2000000000e7c6d8,
pass=0x600000000028ced0) at ../../gcc/passes.c:2443
#8 0x4000000000dc1820 in do_per_function_toporder (callback=<optimized out>,
data=0x600000000028ced0) at ../../gcc/passes.c:1732
#9 0x4000000000dc7490 in execute_ipa_pass_list (pass=0x600000000028ce70)
at ../../gcc/passes.c:2785
#10 0x40000000005f1560 in ipa_passes () at ../../gcc/cgraphunit.c:2265
#11 symbol_table::compile (this=0x2000000000be0000)
at ../../gcc/cgraphunit.c:2404
#12 0x40000000005f8690 in compile (this=0x2000000000be0000)
at ../../gcc/cgraphunit.c:2567
#13 symbol_table::finalize_compilation_unit (this=0x2000000000be0000)
at ../../gcc/cgraphunit.c:2564
#14 0x4000000000fe0f00 in compile_file () at ../../gcc/toplev.c:488
#15 0x40000000001dd890 in do_compile () at ../../gcc/toplev.c:1987
#16 toplev::main (this=<optimized out>, argc=<optimized out>,
argv=<optimized out>) at ../../gcc/toplev.c:2095
#17 0x40000000001e1b50 in main (argc=6, argv=0x600ffffffffef328)
at ../../gcc/main.c:39
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From: "jens.gustedt at inria dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70891] New: "register name not specified" for const qualified register variable
Date: Sun, 01 May 2016 10:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70891
Bug ID: 70891
Summary: "register name not specified" for const qualified
register variable
Product: gcc
Version: 5.3.1
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Created attachment 38387
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38387&action=edit
complete example to reproduce the bug
Gcc in different variants (I tried 4.8, 4.9 and 5.3) gives an error for
register const struct large max4 = { .x0 = -1, .x1 = -1, };
Where large is just a struct consisting of two unsigned.
the error is
gcc-register-const-bug.c:27:31: error: register name not specified for
'max4'
which seems to refer to the "asm register" extension of gcc, but which isn't
used here at all.
The example is minimal in the sense that *any* of the following has the bug
disappear
- removing the const qualification
- removing the register storage class
- changing any of the initial values from -1 to 0
I attach a complete example that on my machine (x86_64) errors out exactly on
the line as indicated. All other variants in that file compile just fine.
As another data point, clang, in different versions, has no problem with this
code at all.
Thanks
Jens
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Subject: [Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure
Date: Sun, 01 May 2016 10:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70704
--- Comment #53 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sun May 1 10:49:25 2016
New Revision: 235692
URL: https://gcc.gnu.org/viewcvs?rev=235692&root=gcc&view=rev
Log:
PR bootstrap/70704
* configure.ac (--enable-stage1-checking): Add missing
--enable-checking=.
* configure: Regenerated.
Modified:
trunk/ChangeLog
trunk/configure
trunk/configure.ac
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Subject: [Bug c++/70892] New: additional memory access generated in loop if destructor is inlined
Date: Sun, 01 May 2016 10:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70892
Bug ID: 70892
Summary: additional memory access generated in loop if
destructor is inlined
Product: gcc
Version: 5.3.1
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Created attachment 38388
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38388&action=edit
testcase
The attached reduced testcase is compiled differently if a simple raii helper
type is used.
testcase:
double array[expected];
double sum = 0.0;
for(int j = 0; j < expected; j++)
array[j] = (double)j;
g++ -std=c++1y -O2 -Wall -Wextra -Werror double_bug_minimal.cc
400950: f2 0f 58 00 addsd (%rax),%xmm0
400954: 48 83 c0 08 add $0x8,%rax
400958: 48 39 d0 cmp %rdx,%rax
40095b: 75 f3 jne 400950 <main+0x70>
g++ -std=c++1y -O2 -Wall -Wextra -Werror -DA double_bug_minimal.cc
400a98: f2 0f 10 4c 24 08 movsd 0x8(%rsp),%xmm1
400a9e: 48 83 c0 08 add $0x8,%rax
400aa2: f2 0f 58 48 f8 addsd -0x8(%rax),%xmm1
400aa7: 48 39 d0 cmp %rdx,%rax
400aaa: f2 0f 11 4c 24 08 movsd %xmm1,0x8(%rsp)
400ab0: 75 e6 jne 400a98 <main+0x78>
g++ --version | head -n1; cat /etc/fedora-release; uname -a
g++ (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6)
Fedora release 23 (Twenty Three)
Linux lautreamont 4.4.7-300.fc23.x86_64 #1 SMP Wed Apr 13 02:52:52 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux
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Subject: [Bug target/52898] SH Target: Inefficient DImode comparisons
Date: Sun, 01 May 2016 12:25:00 -0000
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--- Comment #10 from Oleg Endo <olegendo at gcc dot gnu.org> ---
For a case like
int test3 (long long a)
{
return a == 40;
}
what happens on SH2+ during RTL expansion:
cstoredi4
-> sh_emit_compare_and_set
-> sh_emit_scc_to_t
-> force operands to regs
-> emit cmpeqdi_t insn
Then combine tries e.g.
Trying 6 -> 7:
Failed to match this instruction:
(set (reg:SI 147 t)
(eq:SI (reg:DI 4 r4 [ a ])
(const_int 40 [0x28])))
and in split1 this pattern
(define_split
[(set (reg:SI T_REG)
(eq:SI (match_operand:DI 0 "arith_reg_operand" "")
(match_operand:DI 1 "arith_reg_or_0_operand" "")))]
splits everything up and the resulting code becomes:
mov #0,r3
cmp/eq r3,r5
bt.s .L5
mov #40,r2
rts
movt r0
.align 1
.L5:
cmp/eq r2,r4
rts
movt r0
if the split pattern is disabled, the cmpeqdi_t pattern survives until the end:
mov #40,r2
mov #0,r3
cmp/eq r3,r5
bf 0f
cmp/eq r2,r4
0:
rts
movt r0
which is obviously less code, but has one more branch in the execution path.
This pattern probably should be used when optimizing for size or when
zero-displacement branches are fast.
On SH1 the cstoredi4 pattern is disabled because it might result in e.g.
cmpgtdi_t which needs branches with delay slots. Because of that the middle
end expands some target independent code like:
mov #40,r1
xor r1,r4
or r4,r5
tst r5,r5
rts
movt r0
which is actually a good branch-less alternative.
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Subject: [Bug libstdc++/70893] New: codecvt incorrectly decodes UTF-16 due to optimization
Date: Sun, 01 May 2016 13:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70893
Bug ID: 70893
Summary: codecvt incorrectly decodes UTF-16 due to optimization
Product: gcc
Version: 5.3.0
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In libstdc++ source codecvt.cc:
inline bool is_high_surrogate(char32_t c)
{
return c >= 0xD800 && c <= 0xDBFF;
}
compiles to:
if (is_high_surrogate(c))
0x7ffff7b4d275 lea ecx,[rsi-0xd800]
0x7ffff7b4d27b cmp ecx,0x3ff
0x7ffff7b4d281 ja 0x7ffff7b4d2ad
{
This code incorrectly decode code points like 0xDE00 (iconv can produce those).
GCC and library compilled with -Os.
Possible solution:
inline bool is_high_surrogate(char32_t c)
{
return (c&0xFC00)==0xD800;
}
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Subject: [Bug rtl-optimization/70886] -frename-registers causes boostrap comparison failures on ia64
Date: Sun, 01 May 2016 13:23:00 -0000
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
It's an issue in the speculative machinery of the scheduler but fortunately
easy to fix once you pinpointed it...
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From: "kirillnow at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70893] codecvt incorrectly decodes UTF-16
Date: Sun, 01 May 2016 13:47:00 -0000
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--- Comment #1 from Кирилл <kirillnow at gmail dot com> ---
Bad guess on my part, sorry!
Actual problem is:
305: else if (is_low_surrogate(c))
306: return invalid_mb_sequence;
Stand-alone low surrogates are not uncommon, and could be decoded as valid
utf-8.
Example: Thorn U+00DE Þ Encoded by [iconv (GNU libc) 2.23] -> c=0xDE00
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Subject: [Bug libstdc++/70893] codecvt incorrectly decodes UTF-16
Date: Sun, 01 May 2016 14:02:00 -0000
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--- Comment #2 from Кирилл <kirillnow at gmail dot com> ---
...
Just realized its wrong endianness problem.
codecvt_utf8_utf16 should assume utf16be by default, right? Apparently, no.
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From: "wbx at openadk dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgcc/68468] frv/bfin toolchain build error
Date: Sun, 01 May 2016 14:05:00 -0000
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--- Comment #4 from Waldemar Brodkorb <wbx at openadk dot org> ---
Both fr-v/bfin toolchains can be build by using something like this:
diff -Nur gcc-6.1.0.orig/libgcc/config.host gcc-6.1.0/libgcc/config.host
--- gcc-6.1.0.orig/libgcc/config.host 2016-02-26 21:02:28.000000000 +0100
+++ gcc-6.1.0/libgcc/config.host 2016-04-30 20:49:06.542101273 +0200
@@ -231,7 +231,7 @@
esac
;;
*-*-linux* | frv-*-*linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu | *-*-gnu* |
*-*-kopensolaris*-gnu)
- tmake_file="$tmake_file t-crtstuff-pic t-libgcc-pic t-eh-dw2-dip t-slibgcc
t-slibgcc-gld t-slibgcc-elf-ver t-linux"
+ tmake_file="$tmake_file t-crtstuff-pic t-libgcc-pic t-slibgcc t-slibgcc-gld
t-slibgcc-elf-ver t-linux"
extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
if test x$enable_vtable_verify = xyes; then
extra_parts="$extra_parts vtv_start.o vtv_end.o vtv_start_preinit.o
vtv_end_preinit.o"
Who should have provided the missing struct?
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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/69412] bootstrap-ubsan profiledbootstrap issues
Date: Sun, 01 May 2016 14:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69412
--- Comment #5 from Vittorio Zecca <zeccav at gmail dot com> ---
Bug in comment 4 still in gcc 7
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From: "g.hoogewerf at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70894] New: ICE when using neon intrinsic with mabi=apcs-gnu
Date: Sun, 01 May 2016 16:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70894
Bug ID: 70894
Summary: ICE when using neon intrinsic with mabi=apcs-gnu
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: g.hoogewerf at gmail dot com
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The following test case triggers an ICE on several versions of GCC, including
5.3.0 and 4.9.3.
void crashFunction(unsigned char val)
{
__builtin_neon_vdup_nv16qi ((__builtin_neon_qi) val);
}
To trigger the ICE, the source should be compiled with:
arm-none-eabi-gcc -c neon.c -mfpu=neon -mfloat-abi=softfp -mabi=apcs-gnu
When running with -v -save-temps, the output is:
Using built-in specs.
COLLECT_GCC=./GccBuild/build/arm-none-eabi-newlib/tools/i686-pc-linux-gnu/arm-none-eabi/bin/arm-none-eabi-gcc
Target: arm-none-eabi
Configured with: /home/ghoogewerf/GccBuild/src/gcc/configure
--prefix=/home/ghoogewerf/GccBuild/build/arm-none-eabi-newlib/tools/i686-pc-linux-gnu/arm-none-eabi
--build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=arm-none-eabi
--enable-languages=c,c++ --disable-libssp --disable-multilib --disable-nls
--disable-fixed-point --disable-decimal-float --disable-lto --with-newlib
--with-headers=/home/ghoogewerf/GccBuild/src/newlib/newlib/libc/include
Thread model: single
gcc version 5.3.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-mfpu=neon' '-mfloat-abi=softfp'
'-mabi=apcs-gnu'
/home/ghoogewerf/GccBuild/build/arm-none-eabi-newlib/tools/i686-pc-linux-gnu/arm-none-eabi/libexec/gcc/arm-none-eabi/5.3.0/cc1
-E -quiet -v -D__USES_INITFINI__ neon.c -mfpu=neon -mfloat-abi=softfp
-mabi=apcs-gnu -fpch-preprocess -o neon.i
#include "..." search starts here:
#include <...> search starts here:
/home/ghoogewerf/GccBuild/build/arm-none-eabi-newlib/tools/i686-pc-linux-gnu/arm-none-eabi/lib/gcc/arm-none-eabi/5.3.0/include
/home/ghoogewerf/GccBuild/build/arm-none-eabi-newlib/tools/i686-pc-linux-gnu/arm-none-eabi/lib/gcc/arm-none-eabi/5.3.0/include-fixed
/home/ghoogewerf/GccBuild/build/arm-none-eabi-newlib/tools/i686-pc-linux-gnu/arm-none-eabi/lib/gcc/arm-none-eabi/5.3.0/../../../../arm-none-eabi/sys-include
/home/ghoogewerf/GccBuild/build/arm-none-eabi-newlib/tools/i686-pc-linux-gnu/arm-none-eabi/lib/gcc/arm-none-eabi/5.3.0/../../../../arm-none-eabi/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-mfpu=neon' '-mfloat-abi=softfp'
'-mabi=apcs-gnu'
/home/ghoogewerf/GccBuild/build/arm-none-eabi-newlib/tools/i686-pc-linux-gnu/arm-none-eabi/libexec/gcc/arm-none-eabi/5.3.0/cc1
-fpreprocessed neon.i -quiet -dumpbase neon.c -mfpu=neon -mfloat-abi=softfp
-mabi=apcs-gnu -auxbase neon -version -o neon.s
GNU C11 (GCC) version 5.3.0 (arm-none-eabi)
compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version 3.1.3,
MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C11 (GCC) version 5.3.0 (arm-none-eabi)
compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version 3.1.3,
MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 46d53ae1749a0f498e12cc1c3bd3e85f
neon.c: In function 'crashFunction':
neon.c:4:5: internal compiler error: in copy_to_mode_reg, at explow.c:617
__builtin_neon_vdup_nv16qi ((__builtin_neon_qi) val);
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Thanks,
G. Hoogewerf
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Subject: [Bug c/68120] can't easily deal with integer overflow at compile time
Date: Sun, 01 May 2016 16:41:00 -0000
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--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch posted for review:
https://gcc.gnu.org/ml/gcc-patches/2016-05/msg00013.html
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70507] integer overflow builtins not constant expressions
Date: Sun, 01 May 2016 16:41:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch posted for review:
https://gcc.gnu.org/ml/gcc-patches/2016-05/msg00013.html
>From gcc-bugs-return-523847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 16:42:10 2016
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Subject: [Bug c/70883] inconsistent error message for calls to __builtin_add_overflow with too few arguments
Date: Sun, 01 May 2016 16:42:00 -0000
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Patch posted for review:
https://gcc.gnu.org/ml/gcc-patches/2016-05/msg00013.html
>From gcc-bugs-return-523848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 16:46:01 2016
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Subject: [Bug lto/70611] Compiling binutils with -flto -Wstack-usage fails.
Date: Sun, 01 May 2016 16:46:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
If you are going to be using lto you need to disable warnings as some warnings
don't happen until end of compiling. stack usage is one of these warnings.
>From gcc-bugs-return-523849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 17:26:08 2016
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Subject: [Bug hsa/70857] [6/7 Regression] ICE with -fopenmp -fopenacc in insert_vi_for_tree, at tree-ssa-structalias.c:2813
Date: Sun, 01 May 2016 17:26:00 -0000
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--- Comment #2 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Not surprisingly, it is adding -fopenacc to the compile options that
causes this. Because the testcase does not use any OpenACC
functionality, it should not matter. So something seems to go wrong
at omp lowering/expansion phase. I will have a look.
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Subject: [Bug hsa/70857] [6/7 Regression] ICE with -fopenmp -fopenacc in insert_vi_for_tree, at tree-ssa-structalias.c:2813
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-01
Assignee|unassigned at gcc dot gnu.org |jamborm at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-523851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 18:15:38 2016
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From: "eggert at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/68120] can't easily deal with integer overflow at compile time
Date: Sun, 01 May 2016 18:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68120
--- Comment #6 from Paul Eggert <eggert at gnu dot org> ---
(In reply to Martin Sebor from comment #5)
> Patch posted for review:
> https://gcc.gnu.org/ml/gcc-patches/2016-05/msg00013.html
Thanks. This patch appears to address almost all the request, and it is
definitely a step forward.
Even with the change, I see no easy way in a constant expression to compute the
bottom-order bits (ignoring overflow) of a signed integer value, but I can
raise this issue as a separate enhancement request if it turns into a problem
in practice.
>From gcc-bugs-return-523852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 19:17:38 2016
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From: "ralph.trenkler at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70895] New: OpenACC: loop reduction does not work. Output is zero.
Date: Sun, 01 May 2016 19:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70895
Bug ID: 70895
Summary: OpenACC: loop reduction does not work. Output is zero.
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: ralph.trenkler at gmx dot de
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Created attachment 38389
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38389&action=edit
compiler configure command line, compiler call, program in f90, *.i-file
Problem with OpenACC: The output of the attached fortran 90 program
"acc-test-04.f90" is zero but not "pi" (3.14...), as it should be. The compiler
version is 6.1.0.
>From gcc-bugs-return-523853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 19:23:19 2016
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70890] [7 regression] r235660 miscompiles stage2 compiler on ia64
Date: Sun, 01 May 2016 19:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70890
--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
The error happens here:
0x400000000124cdd0 <+1936>: [MMI] adds r42=-1,r49
0x400000000124cdd1 <+1937>: adds r55=240,r12
0x400000000124cdd2 <+1938>: adds r32=16,r12;;
0x400000000124cde0 <+1952>: [MMI] andcm r39=r42,r49
0x400000000124cde1 <+1953>: st8 [r55]=r32
0x400000000124cde2 <+1954>: nop.i 0x0
=> 0x400000000124cdf0 <+1968>: [MMI] ld8 r54=[r32];;
0x400000000124cdf1 <+1969>: nop.m 0x0
0x400000000124cdf2 <+1970>: popcnt r41=r39;;
0x400000000124ce00 <+1984>: [MII] add r39=r47,r41
0x400000000124ce01 <+1985>: adds r47=44,r12;;
0x400000000124ce02 <+1986>: mov r56=r39
0x400000000124ce10 <+2000>: [MMB] st4 [r47]=r39
0x400000000124ce11 <+2001>: nop.m 0x0
0x400000000124ce12 <+2002>: br.call.sptk.many
b0=0x4000000001256f00 <hash_table<uid_decl_hasher,
xcallocator>::find_with_hash(tree_node* const&, unsigned int)>;;
The marked line loads candidates, but r32 contains &t.
>From gcc-bugs-return-523854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 19:42:04 2016
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70888] #pragma diagnostic ignored -Wlong-long ineffective with __LONG_LONG_MAX__ in c++98 mode
Date: Sun, 01 May 2016 19:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70888
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |manu at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This is a well-known problem with the pragmas for C++ diagnostics in libcpp. I
tried to find a solution, but there were some issues I could not solve and I
ran out of time.
*** This bug has been marked as a duplicate of bug 53431 ***
>From gcc-bugs-return-523855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 19:42:05 2016
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Subject: [Bug c++/53431] C++ preprocessor ignores #pragma GCC diagnostic
Date: Sun, 01 May 2016 19:42:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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CC| |msebor at gcc dot gnu.org
--- Comment #27 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
*** Bug 70888 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523856-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 19:47:28 2016
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From: "manu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/70611] Compiling binutils with -flto -Wstack-usage fails.
Date: Sun, 01 May 2016 19:47:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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Resolution|INVALID |---
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--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> If you are going to be using lto you need to disable warnings as some
> warnings don't happen until end of compiling. stack usage is one of these
> warnings.
How can a user know which warnings are those? GCC should disable on its own
those warnings that cannot be handled by LTO (or emit a clear error that the
warning is not valid with LTO). Same with invalid optimization options and
attributes.
If LTO is ever going to be usable by anyone who is not a GCC developer, it
needs to be usable without knowing the internals of the compiler.
>From gcc-bugs-return-523857-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 19:55:29 2016
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From: "tulipawn at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70896] New: gcc4 ABI compatible bootstrap fails
Date: Sun, 01 May 2016 19:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70896
Bug ID: 70896
Summary: gcc4 ABI compatible bootstrap fails
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: tulipawn at gmail dot com
Target Milestone: ---
I've just tried bootstrapping gcc 6.1.0 on ARM Linux with gcc 4.9.3 using the
following options:
--enable-languages=c,c++,fortran --prefix=/usr/gcc6 --program-suffix=-6
--enable-shared --enable-linker-build-id --libexecdir=/usr/gcc6/lib
--without-included-gettext --enable-threads=posix --libdir=/usr/gcc6/lib
--enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
--enable-gnu-unique-object --disable-libitm --disable-libquadmath
--enable-plugin --with-system-zlib --disable-browser-plugin --enable-multiarch
--enable-multilib --disable-sjlj-exceptions --with-arch=armv7-a
--with-fpu=vfpv3 --with-float=hard --with-mode=thumb --disable-werror
--enable-multilib --enable-checking=release --build=arm-linux-gnueabihf
--host=arm-linux-gnueabihf --target=arm-linux-gnueabihf
but it failed like this:
make[6]: Entering directory
`gcc-6.1.0/build/arm-linux-gnueabihf/libstdc++-v3/src/c++11'
/bin/bash ../../libtool --tag CXX --tag disable-shared --mode=compile
/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/./gcc/xgcc -shared-libgcc
-B/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/./gcc -nostdinc++
-L/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/arm-linux-gnueabihf/libstdc++-v3/src
-L/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/arm-linux-gnueabihf/libstdc++-v3/src/.libs
-L/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs
-B/usr/gcc6/arm-linux-gnueabihf/bin/ -B/usr/gcc6/arm-linux-gnueabihf/lib/
-isystem /usr/gcc6/arm-linux-gnueabihf/include -isystem
/usr/gcc6/arm-linux-gnueabihf/sys-include
-I/home/odroid/.phoronix-test-suite/gcc-6.1.0/libstdc++-v3/../libgcc
-I/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/arm-linux-gnueabihf/libstdc++-v3/include/arm-linux-gnueabihf
-I/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/arm-linux-gnueabihf/libstdc++-v3/include
-I/home/odroid/.phoronix-test-suite/gcc-6.1.0/libstdc++-v3/libsupc++
-std=gnu++11 -prefer-pic -D_GLIBCXX_SHARED -fno-implicit-templates -Wall
-Wextra -Wwrite-strings -Wcast-qual -Wabi -fdiagnostics-show-location=once
-ffunction-sections -fdata-sections -frandom-seed=cow-stdexcept.lo -g -O2
-mcpu=cortex-a5 -O3 -marm -fomit-frame-pointer -fipa-pta -mfpu=vfpv4
-D_GNU_SOURCE -c -o cow-stdexcept.lo
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc
libtool: compile: /home/odroid/.phoronix-test-suite/gcc-6.1.0/build/./gcc/xgcc
-shared-libgcc -B/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/./gcc
-nostdinc++
-L/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/arm-linux-gnueabihf/libstdc++-v3/src
-L/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/arm-linux-gnueabihf/libstdc++-v3/src/.libs
-L/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs
-B/usr/gcc6/arm-linux-gnueabihf/bin/ -B/usr/gcc6/arm-linux-gnueabihf/lib/
-isystem /usr/gcc6/arm-linux-gnueabihf/include -isystem
/usr/gcc6/arm-linux-gnueabihf/sys-include
-I/home/odroid/.phoronix-test-suite/gcc-6.1.0/libstdc++-v3/../libgcc
-I/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/arm-linux-gnueabihf/libstdc++-v3/include/arm-linux-gnueabihf
-I/home/odroid/.phoronix-test-suite/gcc-6.1.0/build/arm-linux-gnueabihf/libstdc++-v3/include
-I/home/odroid/.phoronix-test-suite/gcc-6.1.0/libstdc++-v3/libsupc++
-std=gnu++11 -D_GLIBCXX_SHARED -fno-implicit-templates -Wall -Wextra
-Wwrite-strings -Wcast-qual -Wabi -fdiagnostics-show-location=once
-ffunction-sections -fdata-sections -frandom-seed=cow-stdexcept.lo -g -O2
-mcpu=cortex-a5 -O3 -marm -fomit-frame-pointer -fipa-pta -mfpu=vfpv4
-D_GNU_SOURCE -c ../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc -fPIC
-DPIC -D_GLIBCXX_SHARED -o cow-stdexcept.o
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc: In function ‘const
char* _txnal_sso_string_c_str(const void*)’:
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:300:40: error: ‘const
__sso_string {aka const class std::basic_string<char>}’ has no member named
‘_M_s’; did you mean ‘_M_rep’?
&((const std::__sso_string*) that)->_M_s._M_p));
^~~~
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc: In function ‘void
_ZGTtNSt11logic_errorC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(std::logic_error*,
const __sso_string&)’:
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:378:43: warning: unused
parameter ‘s’ [-Wunused-parameter]
CLASS* that, const std::__sso_string& s) \
^
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:408:1: note: in
expansion of macro ‘CTORDTOR’
CTORDTOR(11logic_error, std::logic_error, logic_error)
^~~~~~~~
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc: In function ‘void
_ZGTtNSt12domain_errorC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(std::domain_error*,
const __sso_string&)’:
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:378:43: warning: unused
parameter ‘s’ [-Wunused-parameter]
CLASS* that, const std::__sso_string& s) \
^
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:417:1: note: in
expansion of macro ‘CTORDTOR’
CTORDTOR(12domain_error, std::domain_error, logic_error)
^~~~~~~~
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc: In function ‘void
_ZGTtNSt16invalid_argumentC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(std::invalid_argument*,
const __sso_string&)’:
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:378:43: warning: unused
parameter ‘s’ [-Wunused-parameter]
CLASS* that, const std::__sso_string& s) \
^
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:418:1: note: in
expansion of macro ‘CTORDTOR’
CTORDTOR(16invalid_argument, std::invalid_argument, logic_error)
^~~~~~~~
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc: In function ‘void
_ZGTtNSt12length_errorC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(std::length_error*,
const __sso_string&)’:
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:378:43: warning: unused
parameter ‘s’ [-Wunused-parameter]
CLASS* that, const std::__sso_string& s) \
^
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:419:1: note: in
expansion of macro ‘CTORDTOR’
CTORDTOR(12length_error, std::length_error, logic_error)
^~~~~~~~
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc: In function ‘void
_ZGTtNSt12out_of_rangeC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(std::out_of_range*,
const __sso_string&)’:
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:378:43: warning: unused
parameter ‘s’ [-Wunused-parameter]
CLASS* that, const std::__sso_string& s) \
^
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:420:1: note: in
expansion of macro ‘CTORDTOR’
CTORDTOR(12out_of_range, std::out_of_range, logic_error)
^~~~~~~~
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc: In function ‘void
_ZGTtNSt13runtime_errorC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(std::runtime_error*,
const __sso_string&)’:
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:378:43: warning: unused
parameter ‘s’ [-Wunused-parameter]
CLASS* that, const std::__sso_string& s) \
^
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:423:1: note: in
expansion of macro ‘CTORDTOR’
CTORDTOR(13runtime_error, std::runtime_error, runtime_error)
^~~~~~~~
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc: In function ‘void
_ZGTtNSt11range_errorC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(std::range_error*,
const __sso_string&)’:
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:378:43: warning: unused
parameter ‘s’ [-Wunused-parameter]
CLASS* that, const std::__sso_string& s) \
^
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:432:1: note: in
expansion of macro ‘CTORDTOR’
CTORDTOR(11range_error, std::range_error, runtime_error)
^~~~~~~~
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc: In function ‘void
_ZGTtNSt14overflow_errorC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(std::overflow_error*,
const __sso_string&)’:
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:378:43: warning: unused
parameter ‘s’ [-Wunused-parameter]
CLASS* that, const std::__sso_string& s) \
^
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:433:1: note: in
expansion of macro ‘CTORDTOR’
CTORDTOR(14overflow_error, std::overflow_error, runtime_error)
^~~~~~~~
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc: In function ‘void
_ZGTtNSt15underflow_errorC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(std::underflow_error*,
const __sso_string&)’:
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:378:43: warning: unused
parameter ‘s’ [-Wunused-parameter]
CLASS* that, const std::__sso_string& s) \
^
../../../../../libstdc++-v3/src/c++11/cow-stdexcept.cc:434:1: note: in
expansion of macro ‘CTORDTOR’
CTORDTOR(15underflow_error, std::underflow_error, runtime_error)
^~~~~~~~
make[6]: *** [cow-stdexcept.lo] Error 1
>From gcc-bugs-return-523858-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 20:09:17 2016
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Subject: [Bug lto/70611] Compiling binutils with -flto -Wstack-usage fails.
Date: Sun, 01 May 2016 20:09:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > If you are going to be using lto you need to disable warnings as some
> > warnings don't happen until end of compiling. stack usage is one of these
> > warnings.
>
> How can a user know which warnings are those? GCC should disable on its own
> those warnings that cannot be handled by LTO (or emit a clear error that the
> warning is not valid with LTO). Same with invalid optimization options and
> attributes.
>
> If LTO is ever going to be usable by anyone who is not a GCC developer, it
> needs to be usable without knowing the internals of the compiler.
There is no internals of GCC here. Rather the user specified all warnings at
link time. If the user did not want that then they did not need to supply
those options ...
>From gcc-bugs-return-523859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 20:11:18 2016
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Subject: [Bug bootstrap/70896] gcc4 ABI compatible bootstrap fails
Date: Sun, 01 May 2016 20:11:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> -fipa-pta
Why are you using that option?
>From gcc-bugs-return-523860-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 20:34:24 2016
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Subject: [Bug lto/70611] Compiling binutils with -flto -Wstack-usage fails.
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--- Comment #4 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> There is no internals of GCC here. Rather the user specified all warnings
> at link time. If the user did not want that then they did not need to
> supply those options ...
That is very user-unfriendly and another reason why people might just
rationally decide that LTO is still not worth the pain.
If I understand correctly, the non-LTO compilation works without warning.
Adding -flto to your CFLAGS should not make your compilation fail in
unexplained ways unless your code is wrong. If LTO is not meant to handle
(some) warnings, then it should disable warnings internally (which would
speed-up compilation). GCC, not the user, should know which warnings work with
LTO and which ones don't, and ignore/disable them.
>From gcc-bugs-return-523861-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 20:36:24 2016
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CC| |manu at gcc dot gnu.org
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
These errors should use error_at instead of error() (input_location must die!)
Even with that change, constants and var_decl do not have locations (PR43486),
so input_location would still need to be used unless one manages to pass down
an array of location_t * args_loc to check_builtin_function_arguments.
>From gcc-bugs-return-523862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 21:02:04 2016
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Subject: [Bug bootstrap/70896] gcc4 ABI compatible bootstrap fails
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--- Comment #2 from PeteVine <tulipawn at gmail dot com> ---
I had this option in my environment FLAGS - is it problematic?
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What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #27 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Steven Bosscher from comment #26)
> Maybe make something like "-Wno-unused-result=[pedantic|nodiscard]", make
> strict the current semantics of the flag and nodiscard the C++17 semantics
> (and make that the default)?
I see two alternatives:
1) Keep nosdiscard and __wur semantics separated and use different flags for
them such as a new -Wdiscard which is enabled by default so that users can use
-Wno-discard to disable "nodiscard" attrib warnings. (Or should it be
-Wnodiscard and -Wno-nodiscard?).
This has the downside that users of existing libraries using __wur do not see
any benefit and this PR goes on.
2) Make __wur more strict than nodiscard only if some new flag
-Wstrict-unused-result is enabled (stricter warnings would print this flag and
users can use -Wno- version to disable it completely without disabling
nodiscard warnings).
This has the downside that users and library devs happy with the existing
behavior will have their default silently changed. The upside is that users can
decide on their own if they want the looser semantics by flipping a single
switch.
Option (2) is equivalent to what is proposed above. In that case
-Wstrict-unused-result will imply -Wunused-result (but not the other way
around) and the only question is whether -Wstrict-unused-result or
-Wunused-result is enabled by default.
"pedantic" has a very precise meaning within GCC that is already quite
difficult to explain, let's not make it even more complex by overloading it.
>From gcc-bugs-return-523864-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 22:11:39 2016
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Subject: [Bug tree-optimization/70586] [7 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu in 32-bit and 64-bit modes
Date: Sun, 01 May 2016 22:11:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #6 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Yep, pure/const function can trap and even throw an exception. We could cleanup
the way we store information about function body and propagate info whether
function can do trap/eh exception and such.
I wonder how desirable is however to turn code path that doesn't call function
into a code path that does. Is it a win?
Shouldn't tree-ssa-ifcombine have some cost model that should have caught this
and decide it unprofitable? Const/pure functions can be very slow.
Honza
>From gcc-bugs-return-523865-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 22:13:41 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70896] gcc4 ABI compatible bootstrap fails
Date: Sun, 01 May 2016 22:13:00 -0000
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--- Comment #3 from PeteVine <tulipawn at gmail dot com> ---
That option never caused me any troubles, btw.
FWIW, once I've removed the `--disable-libstdcxx-dual-abi` option, the build
started chugging along quite nicely.
>From gcc-bugs-return-523866-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 01 22:44:28 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70897] New: Confused branch predictors
Date: Sun, 01 May 2016 22:44:00 -0000
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Bug ID: 70897
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Martin has collected predictor hitrates with current mainline. It seems that
some of predictors no longer works very well. In particular:
loop iv compare, continue, const return, fail alloc, zero-sized array, early
return (on trees), call all have very low hitrates.
This is a regression wrt early GCC 4.x releases when the regular predictor
testing broke.
SPECv6:
HEURISTICS BRANCHES (REL) HITRATE
COVERAGE COVERAGE (REL)
loop iv compare 70 0.1% 59.31% / 71.45%
391732444 391.73M 0.0%
unconditional jump 252 0.2% 100.00% / 100.00%
62269 62.27K 0.0%
guess loop iv compare 362 0.3% 89.02% / 90.08%
2703184164 2.70G 0.2%
continue 429 0.4% 12.85% / 90.20%
37779791284 37.78G 2.9%
negative return 919 0.8% 54.79% / 57.15%
11577463479 11.58G 0.9%
null return 1083 1.0% 99.73% / 99.96%
673967611 673.97M 0.1%
const return 1120 1.0% 11.66% / 96.19%
1856118902 1.86G 0.1%
fail alloc 1151 1.1% 57.13% / 100.00%
144823 144.82K 0.0%
zero-sized array 1960 1.8% 51.41% / 98.82%
104224 104.22K 0.0%
loop guard 3229 3.0% 76.78% / 82.17%
60212618544 60.21G 4.6%
noreturn call 3434 3.2% 100.00% / 100.00%
1910587253 1.91G 0.1%
overflow 3755 3.4% 100.00% / 100.00%
208357 208.36K 0.0%
opcode values positive (on trees) 5759 5.3% 58.56% / 82.94%
59387315517 59.39G 4.6%
loop iterations 7019 6.4% 87.65% / 87.65%
229118021898 229.12G 17.6%
early return (on trees) 8564 7.9% 52.30% / 80.93%
42808951372 42.81G 3.3%
loop exit 9158 8.4% 89.47% / 92.47%
230993449420 230.99G 17.7%
opcode values nonequal (on trees) 9552 8.8% 85.86% / 91.56%
92785638348 92.79G 7.1%
guessed loop iterations 10880 10.0% 94.45% / 94.78%
367779299495 367.78G 28.2%
pointer (on trees) 18682 17.2% 80.01% / 94.69%
18291859871 18.29G 1.4%
no prediction 20863 19.2% 40.36% / 83.66%
203021057312 203.02G 15.6%
first match 33795 31.0% 91.59% / 92.17%
820741493723 820.74G 63.0%
call 34820 32.0% 56.19% / 90.09%
62586683178 62.59G 4.8%
DS theory 54257 49.8% 66.02% / 86.54%
280009272372 280.01G 21.5%
combined 108915 100.0% 78.12% / 89.63%
1303771823407 1.30T 100.0%
HEURISTICS BRANCHES (REL) HITRATE
COVERAGE COVERAGE (REL)
loop iv compare 23 0.0% 52.06% / 52.15%
8806901 8.81M 0.0%
unconditional jump 103 0.2% 100.00% / 100.00%
491001 491.00K 0.0%
guess loop iv compare 133 0.3% 97.78% / 97.81%
4279936888 4.28G 0.4%
negative return 279 0.5% 97.87% / 99.23%
1062639875 1.06G 0.1%
const return 362 0.7% 34.63% / 89.75%
380299097 380.30M 0.0%
null return 396 0.8% 91.47% / 93.08%
3268678453 3.27G 0.3%
continue 438 0.8% 33.36% / 82.86%
9985282412 9.99G 0.9%
fail alloc 595 1.2% 62.18% / 100.00%
595 595.00 0.0%
zero-sized array 677 1.3% 100.00% / 100.00%
112723789 112.72M 0.0%
overflow 1282 2.5% 100.00% / 100.00%
175074149 175.07M 0.0%
loop guard 1806 3.5% 51.80% / 84.49%
5230926398 5.23G 0.5%
noreturn call 2326 4.5% 100.00% / 100.00%
7930483860 7.93G 0.7%
loop iterations 2729 5.3% 75.43% / 75.43%
531785147496 531.79G 47.8%
opcode values positive (on trees) 3125 6.1% 60.97% / 90.49%
15436912826 15.44G 1.4%
guessed loop iterations 5195 10.1% 93.61% / 94.10%
209393449998 209.39G 18.8%
loop exit 5339 10.4% 86.45% / 89.08%
81667429878 81.67G 7.3%
early return (on trees) 6129 11.9% 53.73% / 85.87%
32874618464 32.87G 3.0%
pointer (on trees) 6244 12.1% 69.66% / 87.21%
16710418134 16.71G 1.5%
opcode values nonequal (on trees) 6595 12.8% 66.23% / 80.61%
71478573496 71.48G 6.4%
no prediction 8332 16.2% 32.83% / 84.55%
136479915877 136.48G 12.3%
call 15873 30.8% 63.45% / 92.77%
41601586641 41.60G 3.7%
first match 16619 32.2% 81.34% / 81.68%
828056982571 828.06G 74.4%
DS theory 26610 51.6% 64.93% / 85.46%
148555198747 148.56G 13.3%
combined 51561 100.0% 73.20% / 82.54%
1113092097195 1.11T 100.0%
>From gcc-bugs-return-523867-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 01:47:45 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70896] gcc4 ABI compatible bootstrap fails
Date: Mon, 02 May 2016 01:47:00 -0000
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--- Comment #4 from PeteVine <tulipawn at gmail dot com> ---
Until it failed again during the fortran part:
../../../libgfortran/io/transfer.c: In function ‘bswap_array’:
../../../libgfortran/io/transfer.c:915:25: fatal error: You must enable NEON
instructions (e.g. -mfloat-abi=softfp -mfpu=neon) to use these intrinsics.
((uint16_t*)dest)[i] = __builtin_bswap16 (((uint16_t*)src)[i]);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[3]: *** [transfer.lo] Error 1
but that looks like user error. It would be nice if `configure` could abort or
at least warn on not finding `-mfpu=neon` among CFLAGS if fortran was enabled.
Is there a way to salvage the C/C++ build or do I have to start from scratch?
>From gcc-bugs-return-523868-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 02:06:20 2016
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From: "gccbugs at jbapple dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70898] New: Stateful Compare objects are very slow
Date: Mon, 02 May 2016 02:06:00 -0000
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Bug ID: 70898
Summary: Stateful Compare objects are very slow
Product: gcc
Version: 4.8.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
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/*
The following code is four times slower with libstdc++ than with libc++.
I think the problem is partially too many copies in stl_heap.h. Instrumenting
the code with a copy constructor and a destructor shows two copies of a Comp
and two destructions for every call to push, while in libc++ it's only one call
to a copy constructor and one call to the destructor. It seems like zero calls
should be sufficient, as the Compare object could be kept around between push
calls and reused.
*/
#include <queue>
#include <vector>
#include <iostream>
using namespace std;
struct Comp {
vector<int> data;
Comp(int n) : data(n,n) {}
bool operator()(const double &x, const double &y) const { return x < y; }
};
int main() {
vector<double> data;
Comp comp(150000);
priority_queue<double, vector<double>, Comp> pq(comp, data);
for (int i = 0; i < 100000; ++i) {
pq.push(i);
}
cout << pq.top() << endl;
}
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Subject: [Bug libstdc++/70899] New: Stateful Compare objects are very slow
Date: Mon, 02 May 2016 02:12:00 -0000
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Bug ID: 70899
Summary: Stateful Compare objects are very slow
Product: gcc
Version: 4.8.4
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Priority: P3
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/*
The following code is four times slower with libstdc++ than with libc++.
I think the problem is partially too many copies in stl_heap.h. Instrumenting
the code with a copy constructor and a destructor shows two copies of a Comp
and two destructions for every call to push, while in libc++ it's only one call
to a copy constructor and one call to the destructor. It seems like zero calls
should be sufficient, as the Compare object could be kept around between push
calls and reused.
*/
#include <queue>
#include <vector>
#include <iostream>
using namespace std;
struct Comp {
vector<int> data;
Comp(int n) : data(n,n) {}
bool operator()(const double &x, const double &y) const { return x < y; }
};
int main() {
vector<double> data;
Comp comp(150000);
priority_queue<double, vector<double>, Comp> pq(comp, data);
for (int i = 0; i < 100000; ++i) {
pq.push(i);
}
cout << pq.top() << endl;
}
>From gcc-bugs-return-523871-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 02:17:16 2016
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Subject: [Bug libstdc++/70899] Stateful Compare objects are very slow
Date: Mon, 02 May 2016 02:17:00 -0000
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gccbugs at jbapple dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from gccbugs at jbapple dot com ---
Accidental double-post of identical bug report.
*** This bug has been marked as a duplicate of bug 70898 ***
>From gcc-bugs-return-523870-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 02:17:15 2016
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Subject: [Bug libstdc++/70898] Stateful Compare objects are very slow
Date: Mon, 02 May 2016 02:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70898
--- Comment #1 from gccbugs at jbapple dot com ---
*** Bug 70899 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 05:26:35 2016
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/52898] SH Target: Inefficient DImode comparisons
Date: Mon, 02 May 2016 05:26:00 -0000
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--- Comment #11 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Mon May 2 05:25:46 2016
New Revision: 235698
URL: https://gcc.gnu.org/viewcvs?rev=235698&root=gcc&view=rev
Log:
gcc/
PR target/52898
* config/sh/sh.c (sh_option_override): Remove TARGET_CBRANCHDI4,
TARGET_CMPEQDI_T.
(prepare_cbranch_operands): Don't use scratch register. Assume that
function is used when pseudos can be created.
(expand_cbranchdi4): Likewise. Remove unused TARGET_CMPEQDI_T paths.
* config/sh/sh.md (cbranchsi4): Allow only when pseudos can be created.
(cbranchdi4, cbranchdi4_i): Simplify to single cbranchdi4
define_expand. Allow it only when pseudos can be created.
* config/sh/sh.opt (mcbranchdi, mcmpeqdi): Delete.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sh/sh.c
trunk/gcc/config/sh/sh.md
trunk/gcc/config/sh/sh.opt
>From gcc-bugs-return-523873-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 06:01:43 2016
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From: "glisse at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70898] Stateful Compare objects are very slow
Date: Mon, 02 May 2016 06:01:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
I think you are supposed to use std::reference_wrapper<Comp> as comparator if
you don't want to copy it around. We did talk about reducing the number of
copies (mostly in the context of sorting), but nobody has found the time /
motivation to write patches.
>From gcc-bugs-return-523874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 07:01:22 2016
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Subject: [Bug target/38825] missed optimization: register renaming in unrolled loop
Date: Mon, 02 May 2016 07:01:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |FIXED
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
A testcase variant using __restrict was confirmed:
#include <x86intrin.h>
void bench_3(float * __restrict out, float * __restrict in, float f, unsigned
int n)
{
n /= 8;
__m128 scalar = _mm_set_ps1(f);
do
{
__m128 arg = _mm_load_ps(in);
__m128 result = _mm_add_ps(arg, scalar);
_mm_store_ps(out, result);
arg = _mm_load_ps(in+4);
result = _mm_add_ps(arg, scalar);
_mm_store_ps(out+4, result);
in += 8;
out += 8;
}
while (--n);
}
This is optimized with GCC 4.6 and up with -frename-registers or on trunk
where the latter is enabled by default now.
Fixed thus.
>From gcc-bugs-return-523875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 07:02:50 2016
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Subject: [Bug bootstrap/62077] --with-build-config=bootstrap-lto fails
Date: Mon, 02 May 2016 07:02:00 -0000
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--- Comment #68 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Sven C. Dack from comment #67)
> (In reply to Richard Biener from comment #66)
> > The issue re-appears with GCC 6, the workaround doing
> > --enable-stage1-checking=release still works.
> >
> > Note that the comparison we do with LTO bootstrap is quite pointless as we
> > only compile the internal IL at LTO streaming time but not the final result
> > of optimization. For that we'd need to compare cc1, cc1plus, etc. itself.
> To call it pointless is as dismissive of the effort as saying you'd be
> willing to accept any indeterministic behaviour, including magic, into
> computer science as long as it produces great software. Let's not be this
> lazy.
I'm calling it pointless to motivate adding comparison of the optimized
binaries themselves. I'm not arguing to remove bootstrap comparison
completely - but maybe to remove LTO IL comparison if we got optimized
binary comparison in exchange.
>From gcc-bugs-return-523876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 07:03:35 2016
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Subject: [Bug tree-optimization/70700] ICE using -fdump-tree-all-graph option
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yep, the patch looks ok and pre-approved.
>From gcc-bugs-return-523877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 07:33:19 2016
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Subject: [Bug middle-end/70887] [5 Regression] internal compiler error in trunc_int_for_mode, at explow.c:78
Date: Mon, 02 May 2016 07:33:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.9.3, 6.1.0
Target Milestone|--- |5.4
Known to fail| |5.3.0
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Subject: [Bug middle-end/70887] [5 Regression] internal compiler error in trunc_int_for_mode, at explow.c:78
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
>From gcc-bugs-return-523879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 07:34:07 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70886] [7 Regression] -frename-registers causes boostrap comparison failures on ia64
Date: Mon, 02 May 2016 07:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
Summary|-frename-registers causes |[7 Regression]
|boostrap comparison |-frename-registers causes
|failures on ia64 |boostrap comparison
| |failures on ia64
>From gcc-bugs-return-523880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 07:39:26 2016
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Subject: [Bug web/70880] Main page GCC 7.0 links point to GCC 6
Date: Mon, 02 May 2016 07:39:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
so fixed.
>From gcc-bugs-return-523881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 07:42:52 2016
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Subject: [Bug tree-optimization/70700] ICE using -fdump-tree-all-graph option
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70700
--- Comment #10 from vries at gcc dot gnu.org ---
Author: vries
Date: Mon May 2 07:42:06 2016
New Revision: 235700
URL: https://gcc.gnu.org/viewcvs?rev=235700&root=gcc&view=rev
Log:
Fix ICE in dump_pred_graph
2016-05-02 Marek Polacek <polacek@redhat.com>
Tom de Vries <tom@codesourcery.com>
PR tree-optimization/70700
* tree-ssa-structalias.c (dump_pred_graph): Fix getting varinfo for ids
bigger than FIRST_REF_NODE.
* gcc.dg/pr70700.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr70700.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-structalias.c
>From gcc-bugs-return-523882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 07:43:44 2016
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Subject: [Bug middle-end/70879] Missed jump threading opportunity with multiple != conditions
Date: Mon, 02 May 2016 07:43:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue here is really that we don't insert PHIs for the SSA defs of inserted
asserts so we have to play "tricks" like finding dominating asserts in the
first
place.
>From gcc-bugs-return-523883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 07:46:40 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Keywords| |missed-optimization
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>From gcc-bugs-return-523884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 07:49:40 2016
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Subject: [Bug tree-optimization/70700] ICE using -fdump-tree-all-graph option
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vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Known to work| |7.0
Resolution|--- |FIXED
Target Milestone|--- |7.0
Known to fail| |6.0
--- Comment #11 from vries at gcc dot gnu.org ---
Patch with testcase committed, marking resolved-fixed.
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Subject: [Bug tree-optimization/70884] [6/7 regression] 2nd SRA pass confused by load from constant pool
Date: Mon, 02 May 2016 07:53:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
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Last reconfirmed| |2016-05-02
CC| |alan.lawrence.arm at gmail dot com
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with a cross on the GCC 6 branch.
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Mon, 02 May 2016 07:55:00 -0000
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--- Comment #7 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Bernd Schmidt from comment #6)
> So the problem seems to be peep2 runs before regrename. If you always want
> to generate two instructions there, then yes, a splitter would probably be
> better. Actually just changing define_peephole2 to define_split seems to do
> the trick, can you try whether that fixes the performance regression (I
> don't have a Haswell machine)?
Looking at the pass sequence, it looks to me that we need some global variable
for a "very late" split (_.split4), when we are sure that insn operands won't
be changed anymore.
Even better solution would be a machine-dependent split-like mini-pass plugged
in just after mach-reorg pass.
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Subject: [Bug rtl-optimization/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526
--- Comment #20 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jan de Mooij from comment #17)
> Thank you for looking into this again.
>
> I don't understand comment 16 though:
>
> > _BUT_ here we access D.3125 both as Register (the store)
> > and as its declared type TypedOrValueRegister (the load).
>
> So D.3125 is a TypedOrValueRegister right? TypedOrValueRegister is defined as
>
> class TypedOrValueRegister
> {
> MIRType type_;
> AlignedStorage2<Register> typed;
> ...
>
> So IIUC it's wrong to store to |typed| in the constructor, by doing this:
>
> *typed.addr() = reg;
>
> Why is that? Any suggestions on how to fix this on our end?
No, it's valid to do that. What is not valid is to copy TypedOrValueRegister
with a plain assignment (well, or the C++ FE is implementing that wrongly).
In C language terms the analogy is when you write
struct X { int type; char c[16]; };
float foo ()
{
struct X x;
x.type = 1;
*(float *)x.c = 1.0;
struct X y = x;
return *(float *)y.c;
}
then the aggregate copy y = x is not using an effective type that aliases
with the float store/load and thus it can be re-ordered with both the store
and the load.
I'd have to dive deep into the C++ standard to find the equivalent wording
about how TBAA applies to class types (and the C++ notion of the type
in effect when writing an aggregate assignment or a copy via a return
by value or passing a parameter by value). It might be that the C++ standard
writes the copying is done member-wise with accesses that have the member
type as effective type for TBAA which would mean the C++ FE has to implement
aggregate assignment differently. Note this applies to PODs mostly as
non-PODs would invoke the copy constructor (where then the question is on
the constraints of the default implementation done by GCC again).
I'm going to backport the original fix and I think the new issue warrants
a separate bug as it only affects GCC 6.
>From gcc-bugs-return-523888-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 08:07:36 2016
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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/70900] New: a library-level class-wide subprogram is not generated into .o/.s
Date: Mon, 02 May 2016 08:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70900
Bug ID: 70900
Summary: a library-level class-wide subprogram is not generated
into .o/.s
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: demoonlit at panathenaia dot halfmoon.jp
Target Milestone: ---
gcc-6.1.0 does not generate machine-code for some kind of library-level
class-wide subprograms into .o/.s.
Minor difference of nest-level, profile, or body of it affects possible to
reproduce. I have not found the detailed condition, but found one reproducible
small code, below:
package p is
type t is tagged null record;
end p;
with p;
function p.liblevelcwsubp (obj : p.t'class) return p.t'class is
begin
return obj;
end p.liblevelcwsubp;
% x86_64-apple-darwin10-gcc -c p-liblevelcwsubp.adb
% nm p-liblevelcwsubp.o
nm: no name list
% x86_64-pc-linux-gnu-gcc -c p-liblevelcwsubp.adb
% x86_64-pc-linux-gnu-nm p-liblevelcwsubp.o
(empty output)
% x86_64-apple-darwin10-gcc -S p-liblevelcwsubp.adb
% cat p-liblevelcwsubp.s
.subsections_via_symbols
(end of file)
% x86_64-pc-linux-gnu-gcc -S p-liblevelcwsubp.adb
% cat p-liblevelcwsubp.s
.file "p-liblevelcwsubp.adb"
.ident "GCC: (GNU) 6.1.0"
.section .note.GNU-stack,"",@progbits
(end of file)
% x86_64-apple-darwin10-gcc --version
x86_64-apple-darwin10-gcc (GCC) 6.1.0
Copyright (C) 2016 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.
% x86_64-pc-linux-gnu-gcc --version
x86_64-pc-linux-gnu-gcc (GCC) 6.1.0
Copyright (C) 2016 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.
----------
gcc-5 works:
% gcc -c p-liblevelcwsubp.adb
% nm p-liblevelcwsubp.o
0000000000000230 s EH_frame1
U ___gnat_rcheck_CE_Access_Check
U ___gnat_rcheck_PE_Accessibility_Check
0000000000000000 T __ada_p__liblevelcwsubp
U _memcpy
U _system__secondary_stack__ss_allocate
% gcc -S p-liblevelcwsubp.adb
% cat p-liblevelcwsubp.s
.const
LC0:
.ascii "p-liblevelcwsubp.adb"
.space 1
.text
.globl __ada_p__liblevelcwsubp
__ada_p__liblevelcwsubp:
LFB2:
pushq %rbp
LCFI0:
movq %rsp, %rbp
(...more contents)
% gcc --version
gcc (GCC) 5.3.0
Copyright (C) 2015 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.
>From gcc-bugs-return-523889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 08:17:20 2016
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Subject: [Bug tree-optimization/70882] vectorized sincos trashes the stack
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is a glibc bug.
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Subject: [Bug rtl-optimization/70890] [7 regression] r235660 miscompiles stage2 compiler on ia64
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
>From gcc-bugs-return-523891-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 08:43:55 2016
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/65317] [SH] Shifts used instead of and with const_int
Date: Mon, 02 May 2016 08:43:00 -0000
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |segher at kernel dot crashing.org
--- Comment #3 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Segher, do you think it would make sense to extend combine so that for things
like ...
Failed to match this instruction:
(set (reg:SI 168 [ D.1470 ])
(and:SI (reg:SI 4 r4 [ a ])
(const_int -2147483648 [0xffffffff80000000])))
... it would also try
(set (reg:SI 200) (const_int -2147483648))
(set (reg:SI 168) (and:SI (reg:SI r4) (reg:SI 200)))
I think in some cases it already does try things like that, but for some reason
not in this case here.
>From gcc-bugs-return-523892-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 09:30:34 2016
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Subject: [Bug rtl-optimization/70687] Undefined shift in change_zero_ext in combine.c
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |ASSIGNED
CC| |rsandifo at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |rsandifo at gcc dot gnu.org
--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Taking at HJ's request. Testing a patch.
>From gcc-bugs-return-523893-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 09:39:44 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/70900] [6 regression] a library-level class-wide subprogram is not generated into object file
Date: Mon, 02 May 2016 09:39:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-02
CC| |ebotcazou at gcc dot gnu.org
Target Milestone|--- |6.2
Summary|a library-level class-wide |[6 regression] a
|subprogram is not generated |library-level class-wide
|into .o/.s |subprogram is not generated
| |into object file
Ever confirmed|0 |1
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Confirmed, but already fixed on the mainline.
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Subject: [Bug ada/70900] [6 regression] a library-level class-wide subprogram is not generated into object file
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |ebotcazou at gcc dot gnu.org
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Investigating.
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Subject: [Bug rtl-optimization/70886] [7 Regression] -frename-registers causes boostrap comparison failures on ia64
Date: Mon, 02 May 2016 10:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70886
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Mon May 2 10:08:59 2016
New Revision: 235735
URL: https://gcc.gnu.org/viewcvs?rev=235735&root=gcc&view=rev
Log:
PR rtl-optimization/70886
* sched-deps.c (estimate_dep_weak): Canonicalize cselib values.
* cselib.h (rtx_equal_for_cselib_1): Declare.
(rtx_equal_for_cselib_p: New inline function.
* cselib.c (rtx_equal_for_cselib_p): Delete.
(rtx_equal_for_cselib_1): Make public.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cselib.c
trunk/gcc/cselib.h
trunk/gcc/sched-deps.c
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Subject: [Bug rtl-optimization/70886] [7 Regression] -frename-registers causes boostrap comparison failures on ia64
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
This one is fixed.
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Subject: [Bug c++/70901] New: vectorized sin cos is wrongly optimized into scalar sincos
Date: Mon, 02 May 2016 10:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70901
Bug ID: 70901
Summary: vectorized sin cos is wrongly optimized into scalar
sincos
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: blaffablaffa at gmail dot com
Target Milestone: ---
Created attachment 38390
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38390&action=edit
testcase
As per title. Compile testcase with
g++ -std=c++11 -O1 -fopenmp -ffast-math -march=ivybridge -mtune=ivybridge -o
vector_sin_cos_to_scalar_sincos vector_sin_cos_to_scalar_sincos.cpp
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Subject: [Bug c++/70901] vectorized sin cos is wrongly optimized into scalar sincos
Date: Mon, 02 May 2016 10:35:00 -0000
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Lorenzo Pistone <blaffablaffa at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |blaffablaffa at gmail dot com
--- Comment #1 from Lorenzo Pistone <blaffablaffa at gmail dot com> ---
Note that vectorized sincos is currently (glibc 2.22) broken:
https://sourceware.org/bugzilla/show_bug.cgi?id=20024
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Subject: [Bug c/70859] Bad column number in type-generic function errors
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70895] OpenACC: loop reduction does not work. Output is zero.
Date: Mon, 02 May 2016 10:56:00 -0000
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |openacc
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2016-05-02
CC| |cesar at gcc dot gnu.org,
| |nathan at gcc dot gnu.org,
| |tschwinge 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> ---
(In reply to Ralph Trenkler from comment #0)
> Created attachment 38389 [details]
> compiler configure command line, compiler call, program in f90, *.i-file
Thanks for that!
> Problem with OpenACC: The output of the attached fortran 90 program
> "acc-test-04.f90" is zero but not "pi" (3.14...), as it should be. The
> compiler version is 6.1.0.
There is no "copy(pi)" or "reduction(+:pi)" clause on the outer "acc parallel"
construct, so the offloaded computation of "pi" will not be copied back; hence
the result of zero. (Cesar CCed; please shout if I'm interpreting the OpenACC
2.0a specification wrongly.)
Also, due to the gang/worker/vector loop scheduling algorithm that's currently
used, you'll want to add explicit "gang worker vector" clauses to the one-level
"acc loop" construct. (Nathan CCed for your information.)
Do you have any further questions?
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From: "anton.mitrokhin at phystech dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70902] New: GCC freezes while compiling for 'skylake-avx512' target
Date: Mon, 02 May 2016 11:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70902
Bug ID: 70902
Summary: GCC freezes while compiling for 'skylake-avx512'
target
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: anton.mitrokhin at phystech dot edu
Target Milestone: ---
Created attachment 38391
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38391&action=edit
Reproducer
GCC trunk compiler freezes indefinitely while trying to build for
skylake-avx512 target on -O3 and -Ofast.
Reproducer:
> g++ -std=c++11 -Ofast -march=skylake-avx512 -o out crash.cpp
Output:
freezes
Version:
> g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/export/users/amitrokh/gcc_trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /export/users/gnutester/stability/svn/trunk/configure
--with-arch=corei7 --with-cpu=corei7 --enable-clocale=gnu --with-system-zlib
--enable-shared --with-demangler-in-ld --enable-cloog-backend=isl
--with-fpmath=sse --with-pkgversion=Revision=235693/svn-rev:235693/
--prefix=/export/users/gnutester/stability/work/trunk/64/install
--enable-languages=c,c++,fortran,java,lto
Thread model: posix
gcc version 7.0.0 20160501 (experimental) (Revision=235693/svn-rev:235693/)
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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70903] New: [4.9/5/6/7 Regression] wrong code with bfi @ aarch64 with -Os
Date: Mon, 02 May 2016 11:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70903
Bug ID: 70903
Summary: [4.9/5/6/7 Regression] wrong code with bfi @ aarch64
with -Os
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
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Reporter: zsojka at seznam dot cz
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Host: x86_64-pc-linux-gnu
Target: aarch64-unknown-linux-gnu
Created attachment 38392
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38392&action=edit
reduced testcase
Output:
$ aarch64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-aarch64/bin/aarch64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-235588-checking-yes-rtl-df-nographite-aarch64/bin/../libexec/gcc/aarch64-unknown-linux-gnu/7.0.0/lto-wrapper
Target: aarch64-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl
--with-sysroot=/usr/aarch64-unknown-linux-gnu
--target=aarch64-unknown-linux-gnu --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=aarch64-unknown-linux-gnu
--with-ld=/usr/bin/aarch64-unknown-linux-gnu-ld
--with-as=/usr/bin/aarch64-unknown-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-235588-checking-yes-rtl-df-nographite-aarch64
Thread model: posix
gcc version 7.0.0 20160428 (experimental) (GCC)
$ aarch64-unknown-linux-gnu-gcc -Os testcase.c
$ ./a.out
qemu: uncaught target signal 6 (Aborted) - core dumped
Aborted
$ diff -u testcase.s testcase.s.fixed
--- testcase.s 2016-05-02 12:57:29.920221842 +0200
+++ testcase.s.fixed 2016-05-02 12:52:41.060217727 +0200
@@ -59,7 +59,7 @@
adrp x1, .LC0 // tmp87,
mov x0, x8 // tmp82,
add x4, x1, :lo12:.LC0 // tmp86, tmp87,
- mov x8, -1 // tmp95,
+ mov x8, 255 // tmp95,
mov x3, 0 // D.2757,
mov x2, 0 // D.2757,
bfi x3, x8, 0, 8 // D.2757, tmp95,,
fixes the assembly for this particular testcase.
While (u8)255 == (u8)-1, x8==-1 cannot be used for 32bit load.
>From gcc-bugs-return-523903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 11:13:53 2016
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Subject: [Bug target/70904] New: ICE: Max. number of generated reload insns per insn is achieved (90) with -fno-split-wide-types @ aarch64
Date: Mon, 02 May 2016 11:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70904
Bug ID: 70904
Summary: ICE: Max. number of generated reload insns per insn is
achieved (90) with -fno-split-wide-types @ aarch64
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: aarch64-unknown-linux-gnu
Created attachment 38393
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38393&action=edit
reduced testcase
Compiler output:
$ aarch64-unknown-linux-gnu-gcc -O -fno-split-wide-types testcase.c
testcase.c: In function 'foo':
testcase.c:8:1: internal compiler error: Max. number of generated reload insns
per insn is achieved (90)
}
^
0x9dafa9 lra_constraints(bool)
/repo/gcc-trunk/gcc/lra-constraints.c:4440
0x9c63dc lra(_IO_FILE*)
/repo/gcc-trunk/gcc/lra.c:2290
0x96de19 do_reload
/repo/gcc-trunk/gcc/ira.c:5425
0x96de19 execute
/repo/gcc-trunk/gcc/ira.c:5609
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.
$ aarch64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-aarch64/bin/aarch64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-235588-checking-yes-rtl-df-nographite-aarch64/bin/../libexec/gcc/aarch64-unknown-linux-gnu/7.0.0/lto-wrapper
Target: aarch64-unknown-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl
--with-sysroot=/usr/aarch64-unknown-linux-gnu
--target=aarch64-unknown-linux-gnu --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=aarch64-unknown-linux-gnu
--with-ld=/usr/bin/aarch64-unknown-linux-gnu-ld
--with-as=/usr/bin/aarch64-unknown-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-235588-checking-yes-rtl-df-nographite-aarch64
Thread model: posix
gcc version 7.0.0 20160428 (experimental) (GCC)
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Subject: [Bug target/70903] [4.9/5/6/7 Regression] wrong code with bfi @ aarch64 with -Os
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.9.4
>From gcc-bugs-return-523904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 11:26:02 2016
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Subject: [Bug target/70860] [nvptx] Revisit cfun->machine->doing_call
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70860
--- Comment #1 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Author: tschwinge
Date: Mon May 2 11:25:17 2016
New Revision: 235748
URL: https://gcc.gnu.org/viewcvs?rev=235748&root=gcc&view=rev
Log:
[PR target/70860] [nvptx] Handle NULL cfun in nvptx_libcall_value
gcc/
PR target/70860
* config/nvptx/nvptx.c (nvptx_libcall_value): Handle NULL cfun.
(nvptx_function_value): Assert non-NULL cfun.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/nvptx/nvptx.c
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Subject: [Bug target/70902] [7 Regression] GCC freezes while compiling for 'skylake-avx512' target
Date: Mon, 02 May 2016 11:28:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*
Status|UNCONFIRMED |NEW
Known to work| |6.1.0
Keywords| |compile-time-hog, ra
Last reconfirmed| |2016-05-02
CC| |vmakarov at gcc dot gnu.org
Ever confirmed|0 |1
Summary|GCC freezes while compiling |[7 Regression] GCC freezes
|for 'skylake-avx512' target |while compiling for
| |'skylake-avx512' target
Target Milestone|--- |7.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Hangs in lra.
>From gcc-bugs-return-523907-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 11:36:47 2016
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Subject: [Bug c/70851] internal compiler error: in create_tmp_var, at gimple-expr.c:473
Date: Mon, 02 May 2016 11:36:00 -0000
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Mon May 2 11:35:59 2016
New Revision: 235750
URL: https://gcc.gnu.org/viewcvs?rev=235750&root=gcc&view=rev
Log:
PR c/70851
* c-decl.c (grokdeclarator): Diagnose when array's size has an
incomplete type.
* gcc.dg/enum-incomplete-3.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/enum-incomplete-3.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug rtl-optimization/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
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--- Comment #21 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon May 2 11:36:38 2016
New Revision: 235751
URL: https://gcc.gnu.org/viewcvs?rev=235751&root=gcc&view=rev
Log:
2016-05-02 Richard Biener <rguenther@suse.de>
Backport from mainline
2016-04-05 Richard Biener <rguenther@suse.de>
PR tree-optimization/70526
* tree-sra.c (build_ref_for_offset): Use prev_base to
extract the alias pointer type.
* g++.dg/torture/pr70526.C: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/torture/pr70526.C
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/tree-sra.c
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Subject: [Bug c/70851] internal compiler error: in create_tmp_var, at gimple-expr.c:473
Date: Mon, 02 May 2016 11:39:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Mon, 02 May 2016 11:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70873
--- Comment #8 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
mach-reorg seems too late, I think you'd want to schedule the xors?
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70905] New: [7 regression] FAIL: gcc.c-torture/compile/20011219-2.c -Os (unrecognizable insn)
Date: Mon, 02 May 2016 11:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70905
Bug ID: 70905
Summary: [7 regression] FAIL:
gcc.c-torture/compile/20011219-2.c -Os (unrecognizable
insn)
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: schwab@linux-m68k.org
Target Milestone: ---
Target: powerpc-*-*
$ gcc/xgcc -Bgcc/ -m32 -Os -c
../gcc/testsuite/gcc.c-torture/compile/20011219-2.c
../gcc/testsuite/gcc.c-torture/compile/20011219-2.c: In function ‘foo’:
../gcc/testsuite/gcc.c-torture/compile/20011219-2.c:20:1: error: unrecognizable
insn:
}
^
(insn 74 73 75 6 (parallel [
(set (reg:SI 31 31)
(mem/c:SI (plus:SI (reg/f:SI 1 1)
(const_int 20 [0x14])) [4 S4 A8]))
]) ../gcc/testsuite/gcc.c-torture/compile/20011219-2.c:20 -1
(nil))
../gcc/testsuite/gcc.c-torture/compile/20011219-2.c:20:1: internal compiler
error: in extract_insn, at recog.c:2287
0x1069449b _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc/rtl-error.c:108
0x106944ef _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
../../gcc/rtl-error.c:116
0x1065bef7 extract_insn(rtx_insn*)
../../gcc/recog.c:2287
0x1065d5d7 extract_constrain_insn(rtx_insn*)
../../gcc/recog.c:2188
0x1066a7f7 build_def_use
../../gcc/regrename.c:1637
0x1066a7f7 regrename_analyze(bitmap_head*)
../../gcc/regrename.c:738
0x1066c64f regrename_optimize
../../gcc/regrename.c:1892
0x1066c64f execute
../../gcc/regrename.c:1929
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Mon, 02 May 2016 12:00:00 -0000
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--- Comment #9 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Bernd Schmidt from comment #8)
> mach-reorg seems too late, I think you'd want to schedule the xors?
Yes, indeed. That leaves _.split4 to perform splits.
>From gcc-bugs-return-523912-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 12:00:30 2016
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Subject: [Bug target/70905] [7 regression] FAIL: gcc.c-torture/compile/20011219-2.c -Os (unrecognizable insn)
Date: Mon, 02 May 2016 12:00:00 -0000
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Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
>From gcc-bugs-return-523914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 12:21:33 2016
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70906] New: ice in add_expr, at tree.c:7925
Date: Mon, 02 May 2016 12:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70906
Bug ID: 70906
Summary: ice in add_expr, at tree.c:7925
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 38394
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38394&action=edit
gzipped C++ source code
The attached code, when compiled by gcc trunk dated 20160502,
does this:
/usr/include/boost/intrusive/detail/hook_traits.hpp:117:77: internal compiler
error: in add_expr, at tree.c:7925
(static_cast<node_reference>(static_cast<hook_reference>(value.*P)));
^
0x110ce65 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
../../src/trunk/gcc/tree.c:7925
0x110c634 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
../../src/trunk/gcc/tree.c:8002
0xaed3a0 operand_equal_p(tree_node const*, tree_node const*, unsigned int)
../../src/trunk/gcc/fold-const.c:2762
0x8c24f5 candidate_equal_p
../../src/trunk/gcc/c-family/c-common.c:2927
Flag -Wall required. This bug might be related to #70843
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Subject: [Bug rtl-optimization/70890] [7 regression] r235660 miscompiles stage2 compiler on ia64
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Alan Modra <amodra at gmail dot com> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2016-05-02
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--- Comment #3 from Alan Modra <amodra at gmail dot com> ---
It looks like my ira.c change has triggered a reload bug. insn 525 is the one
identified in comment #2.
254r.sched1
(insn 518 507 524 44 (set (reg/f:DI 420 [ candidates.515_151 ])
(mem/f/c:DI (reg/f:DI 1381) [310 candidates+0 S8 A64]))
/src/gcc.git/gcc/tree-sra.c:324 6 {movdi_internal}
(nil))
...
(insn 525 509 510 44 (set (reg:DI 120 out0)
(reg/f:DI 420 [ candidates.515_151 ])) /src/gcc.git/gcc/tree-sra.c:324
6 {movdi_internal}
(expr_list:REG_DEAD (reg/f:DI 420 [ candidates.515_151 ])
(nil)))
...
(insn 517 1571 520 160 (set (reg/f:DI 1381)
(symbol_ref:DI ("_ZL10candidates") [flags 0x6] <var_decl
0x7f88d53c25a0 candidates>)) /src/gcc.git/gcc/tree-sra.c:324 6 {movdi_internal}
(nil))
255r.ira, moves insn 517 to just before use
(insn 2078 507 518 44 (set (reg/f:DI 1381)
(symbol_ref:DI ("_ZL10candidates") [flags 0x6] <var_decl
0x7f88d53c25a0 candidates>)) /src/gcc.git/gcc/tree-sra.c:324 6 {movdi_internal}
(expr_list:REG_EQUIV (symbol_ref:DI ("_ZL10candidates") [flags 0x6]
<var_decl 0x7f88d53c25a0 candidates>)
(nil)))
(insn 518 2078 524 44 (set (reg/f:DI 420 [ candidates.515_151 ])
(mem/f/c:DI (reg/f:DI 1381) [310 candidates+0 S8 A64]))
/src/gcc.git/gcc/tree-sra.c:324 6 {movdi_internal}
(expr_list:REG_DEAD (reg/f:DI 1381)
(expr_list:REG_EQUIV (mem/f/c:DI (reg/f:DI 1381) [310 candidates+0 S8
A64])
(nil))))
...
(insn 525 509 510 44 (set (reg:DI 120 out0)
(reg/f:DI 420 [ candidates.515_151 ])) /src/gcc.git/gcc/tree-sra.c:324
6 {movdi_internal}
(expr_list:REG_DEAD (reg/f:DI 420 [ candidates.515_151 ])
(nil)))
256.reload
(note 518 507 2116 44 NOTE_INSN_DELETED)
...
(insn 525 509 510 44 (set (reg:DI 120 out0)
(mem/f/c:DI (reg/f:DI 15 r15 [1381]) [310 candidates+0 S8 A64]))
/src/gcc.git/gcc/tree-sra.c:324 6 {movdi_internal}
(nil))
and insn 2078 is DCEd.
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Subject: [Bug c++/70906] ice in add_expr, at tree.c:7925
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |mpolacek at gcc dot gnu.org
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug rtl-optimization/70907] New: [7 regression] FAIL: gcc.target/powerpc/savres.c -Os execution test
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Bug ID: 70907
Summary: [7 regression] FAIL: gcc.target/powerpc/savres.c -Os
execution test
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: schwab@linux-m68k.org
Target Milestone: ---
Target: powerpc*-*-*
This is another -frename-registers fallout.
$ gcc/xgcc -Bgcc/ ../gcc/testsuite/gcc.target/powerpc/savres.c -O2 -fno-inline
-fomit-frame-pointer -o savres
$ ./savres
Aborted
It aborts after b_cr, because the preceding cmpw clobbers cr2.
>From gcc-bugs-return-523918-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 12:40:01 2016
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Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
>From gcc-bugs-return-523919-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 12:55:17 2016
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Subject: [Bug c++/70906] [7 Regression] ice in add_expr, at tree.c:7925
Date: Mon, 02 May 2016 12:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Summary|ice in add_expr, at |[7 Regression] ice in
|tree.c:7925 |add_expr, at tree.c:7925
>From gcc-bugs-return-523920-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 13:22:57 2016
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Subject: [Bug middle-end/70879] Missed jump threading opportunity with multiple != conditions
Date: Mon, 02 May 2016 13:22:00 -0000
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--- Comment #3 from Jeffrey A. Law <law at redhat dot com> ---
Which is the problem Andrew has started poking at :-) One of the paths being
explored is creating those PHIs.
>From gcc-bugs-return-523921-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 13:24:56 2016
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Subject: [Bug target/70908] New: [SH] Redirect function call returns
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Bug ID: 70908
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In the CSiBE set e.g. in jikespg-1.3/src/spacetab.c there are sequences like:
-----------------
...
bra .L1965
mov.l @r3,r4
.align 1
...
< some constant pool data >
...
.L1965:
jsr @r5
nop
...
-----------------
...
jsr @r5
mov.l @r3,r4
bra .L1965
nop
.align 1
...
< some constant pool data >
...
.L1965:
...
-----------------
In such cases one branch can be avoided by redirecting the return address of
the invoked function like this:
mova .L1965,r0
lds r0,pr
jmp @r5
mov.l @r3,r4
This has to be done after constant pool placement by the sh_reorg pass.
Probably PR 59189 should be fixed first.
>From gcc-bugs-return-523922-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 13:27:26 2016
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Subject: [Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
C++14 3.10/10 (that's basically the same as the C standard says). The question
remains on whether
ConstantOrRegister cr = ToConstantOrRegister(&lir, 0, MIRType_Object);
(the aggregate copy performed by the init expression) applies to
"If a program attempts to access the stored value of an object through a
grvalue
of other than one of the following types..."
Where "the stored value" in this case is of type Register and the type of
the grvalue is TypedOrValueRegister (which does not include 'Register' as
member).
To fix your case I'd simply use
class TypedOrValueRegister
{
MIRType type_;
union {
Register reg_;
... whatever other type you need ...
};
...
};
Fixed (what I fixed with the commit) and INVALID for the rest.
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Subject: [Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
Date: Mon, 02 May 2016 13:43:00 -0000
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--- Comment #23 from Richard Biener <rguenth at gcc dot gnu.org> ---
A fix for your testcase would also be to do
template<typename T>
struct AlignedStorage2
{
union U
{
char mBytes[sizeof(T)];
uint64_t mDummy;
} u;
typedef T _T __attribute__((may_alias));
const _T* addr() const { return reinterpret_cast<const _T*>(u.mBytes); }
_T* addr() { return static_cast<_T*>(static_cast<void*>(u.mBytes)); }
};
that is, making sure to return may_alias pointers (and use
AlignedStorage2<>::_T
for temporaries you save addr to and do other accesses). The stores done
via that type are allowed to be accessed with an effective type of
TypedOrValueRegister.
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Subject: [Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jwakely.gcc at gmail dot com
--- Comment #24 from Richard Biener <rguenth at gcc dot gnu.org> ---
CCing libstdc++ people to see whether std::aligned_storage needs any
adjustment.
>From gcc-bugs-return-523925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 14:08:34 2016
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Subject: [Bug target/70907] [7 regression] FAIL: gcc.target/powerpc/savres.c -Os execution test
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Andreas Schwab <schwab@linux-m68k.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
I think this is a bug in the test, it cannot expect that cr2 remains unmodified
throughout the function.
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Subject: [Bug c++/70909] New: Libiberty Demangler segfaults (4)
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Bug ID: 70909
Summary: Libiberty Demangler segfaults (4)
Product: gcc
Version: unknown
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Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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A stack overflow in the libiberty demangler library causes its host
applications to crash. The stack contains return addresses that are not mapped
in the inferior's process address space and/or the stack pointer is pointing to
a location outside the default stack region. These conditions likely indicate
stack corruption, which is generally considered exploitable.
How to reproduce:
$ valgind c++filt _Z1MA_aMMMMA_MMA_MMMMMMMMSt1MS_o11T0000000000t2M0oooozoooo
==80066== Stack overflow in thread 1: can't grow stack to 0xffe801ff8
==80066==
==80066== Process terminating with default action of signal 11 (SIGSEGV):
dumping core
==80066== Access not within mapped region at address 0xFFE801FF8
==80066== at 0x78CAA4: d_print_comp_inner (cp-demangle.c:4332)
This specific stack overflow has not been reported but with a bit of searching
it seems to be linked to the open bugs PR61460, PR68700, PR67738, PR68383,
PR70517, PR61805, PR62279, and the meta bug PR67264. The prepared patch
addresses all of these.
Analysis: The method d_print_comp in cp-demangle.c recursively constructs the
d_print_info dpi from the demangle_component dc. The method d_print_comp_inner
traverses dc as a graph. Now, dc can be a graph with cycles leading to infinite
recursion in several distinct cases.
This vulnerability was found with a more efficient version of AFL.
>From gcc-bugs-return-523927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 14:28:11 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70895] OpenACC: loop reduction does not work. Output is zero.
Date: Mon, 02 May 2016 14:28:00 -0000
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--- Comment #2 from cesar at gcc dot gnu.org ---
Thomas is correct. Note that when gcc-6.2 is released you should be able to
replace
!$acc parallel vector_length(vl)
!$acc loop reduction(+:pi) private(t)
with
!$acc parallel loop reduction(+:pi) vector_length(vl)
and that will automatically add a copy clause for 'pi'. See PR70626 for more
details.
Furthermore, as Thomas mentioned, gcc-6 does not automatically assign
parallelism to loops inside parallel regions. Consequently, you need to
explicitly use num_gangs, num_workers and vector_length to determine the amount
of parallelism and gang, worker and vector to partition the acc loops
accordingly. Also note that only nvptx targets are accelerated in gcc-6; the
host code runs in a single thread.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70895] OpenACC: loop reduction does not work. Output is zero.
Date: Mon, 02 May 2016 14:58:00 -0000
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--- Comment #3 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to cesar from comment #2)
> Furthermore, as Thomas mentioned, gcc-6 does not automatically assign
> parallelism to loops inside parallel regions.
:-) GCC 6.1 does do that that.
> Consequently, you need to
> explicitly use num_gangs, num_workers and vector_length to determine the
> amount of parallelism and gang, worker and vector to partition the acc loops
> accordingly.
GCC 6.1 by default will configure nvptx offloading for 32 gangs, 32 workers,
and a vector length of 32 (so, you don't need to specify "num_gangs()
num_workers() vector_length()" clauses). What it will not do (and what was the
point of my earlier note in #c1), is assign more than one of OpenACC's
parallelism levels (gang, worker, vector) to a one-level loop constructs, which
is why you'll want to specify "gang worker vector" clauses for the loop
construct.
>From gcc-bugs-return-523929-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 15:05:06 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70895] OpenACC: loop reduction does not work. Output is zero.
Date: Mon, 02 May 2016 15:05:00 -0000
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--- Comment #4 from cesar at gcc dot gnu.org ---
(In reply to Thomas Schwinge from comment #3)
> (In reply to cesar from comment #2)
> > Consequently, you need to
> > explicitly use num_gangs, num_workers and vector_length to determine the
> > amount of parallelism and gang, worker and vector to partition the acc loops
> > accordingly.
>
> GCC 6.1 by default will configure nvptx offloading for 32 gangs, 32 workers,
> and a vector length of 32 (so, you don't need to specify "num_gangs()
> num_workers() vector_length()" clauses). What it will not do (and what was
> the point of my earlier note in #c1), is assign more than one of OpenACC's
> parallelism levels (gang, worker, vector) to a one-level loop constructs,
> which is why you'll want to specify "gang worker vector" clauses for the
> loop construct.
Thomas is correct. I've been focusing too much on the front ends and not the
loop partitioning infrastructure. Sorry for the noise.
>From gcc-bugs-return-523930-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 16:07:17 2016
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Subject: [Bug libstdc++/70101] Allocator-extended priority_queue constructors are badly broken
Date: Mon, 02 May 2016 16:07:00 -0000
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--- Comment #1 from TC <rs2740 at gmail dot com> ---
Test case for everything except the first:
#include <queue>
#include <functional>
#include <vector>
#include <memory>
#include <utility>
struct Cmp : std::less<int> {
explicit Cmp(int) {};
};
Cmp comp(1);
std::allocator<int> alloc;
std::vector<int> vec;
using PQ = std::priority_queue<int, std::vector<int>, Cmp>;
PQ pq2(comp, alloc);
PQ pq3(comp, vec, alloc);
PQ pq4(comp, std::move(vec), alloc);
PQ pq5(pq2, alloc);
PQ pq6(std::move(pq2), alloc);
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70467] Useless "and [esp],-1" emitted on AND with uint64_t variable
Date: Mon, 02 May 2016 16:17:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon May 2 16:17:02 2016
New Revision: 235764
URL: https://gcc.gnu.org/viewcvs?rev=235764&root=gcc&view=rev
Log:
PR rtl-optimization/70467
* ipa-pure-const.c (check_call): Handle internal calls even in
ipa mode like in local mode.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ipa-pure-const.c
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Subject: [Bug c/70756] Wrong column number shown for "error: invalid use of flexible array member"
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
The column number problem aside, the diagnostic itself could stand to be
improved as well and made more informative (it may not be obvious why the use
of the flexible array member is invalid). Below are a few ideas taken from
other implementations:
Clang:
error: arithmetic on a pointer to an incomplete type 'int []'
Oracle c99:
cannot do pointer arithmetic on operand of unknown size
XLC:
(S) Operation between types "int(*)[]" and "int" is not allowed.
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Subject: [Bug rtl-optimization/70467] Useless "and [esp],-1" emitted on AND with uint64_t variable
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon May 2 16:46:10 2016
New Revision: 235765
URL: https://gcc.gnu.org/viewcvs?rev=235765&root=gcc&view=rev
Log:
PR rtl-optimization/70467
* cse.c (cse_insn): Handle no-op MEM moves after folding.
* gcc.target/i386/pr70467-1.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70467-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cse.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c/70910] New: error declaring a type in clause-1 of a for statement
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70910
Bug ID: 70910
Summary: error declaring a type in clause-1 of a for statement
Product: gcc
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Not sure if this is related to c/67784 but today's top of trunk as well as
prior versions fail to compile the following valid program. Similarly with
"for (struct S { int i; } s; ; )"
$ cat u.c && /home/msebor/build/gcc-trunk-git/gcc/xgcc
-B/home/msebor/build/gcc-trunk-git/gcc -S -Wall -Wextra -Wpedantic -xc u.c
void h (void) {
for (enum E { e } f; ; );
}
u.c: In function ‘h’:
u.c:2:3: error: declaration of non-variable ‘e’ in ‘for’ loop initial
declaration
for (enum E { e } f; ; );
^~~
u.c:2:3: error: ‘enum E’ declared in ‘for’ loop initial declaration
u.c:2:21: warning: unused variable ‘f’ [-Wunused-variable]
for (enum E { e } f; ; );
^
>From gcc-bugs-return-523935-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 16:48:43 2016
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Subject: [Bug target/65317] [SH] Shifts used instead of and with const_int
Date: Mon, 02 May 2016 16:48:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |segher at gcc dot gnu.org
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #3)
> Segher, do you think it would make sense to extend combine so that for
> things like ...
>
> Failed to match this instruction:
> (set (reg:SI 168 [ D.1470 ])
> (and:SI (reg:SI 4 r4 [ a ])
> (const_int -2147483648 [0xffffffff80000000])))
>
> ... it would also try
>
> (set (reg:SI 200) (const_int -2147483648))
> (set (reg:SI 168) (and:SI (reg:SI r4) (reg:SI 200)))
>
>
> I think in some cases it already does try things like that, but for some
> reason not in this case here.
Hi Oleg,
What are the original instructions it tried to combine here? If the
combined insn does not match (as here), combine tries to split it into
two in various ways, but only if it started out with more than two insns.
Now that we also check for insn cost we could change that (allow combining
2->2 if that reduces the rtx cost), but this will of course need testing
everywhere. I'll see what I can do.
>From gcc-bugs-return-523936-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 16:55:33 2016
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Subject: [Bug c/70911] New: Typo in "warning: initialized field with side-effects overwritten"
Date: Mon, 02 May 2016 16:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70911
Bug ID: 70911
Summary: Typo in "warning: initialized field with side-effects
overwritten"
Product: gcc
Version: 7.0
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When compiling such program:
int main()
{
int k = 0;
struct { int x; } s = { .x = k++, .x = 0 };
(void)s;
}
I get the following warning:
$ gcc example.c
example.c: In function ‘main’:
example.c:4:42: warning: initialized field with side-effects overwritten
[-Woverride-init-side-effects]
struct { int x; } s = { .x = k++, .x = 0 };
^
example.c:4:42: note: (near initialization for ‘s.x’)
Shouldn't "overwritten" be "overridden" instead?
>From gcc-bugs-return-523937-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 17:07:27 2016
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Subject: [Bug c++/70498] Libiberty Demangler segfaults (3)
Date: Mon, 02 May 2016 17:07:00 -0000
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--- Comment #3 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Author: bernds
Date: Mon May 2 17:06:40 2016
New Revision: 235767
URL: https://gcc.gnu.org/viewcvs?rev=235767&root=gcc&view=rev
Log:
Demangler integer overflow fixes from Marcel Böhme.
PR c++/70498
* cp-demangle.c: Parse numbers as integer instead of long to avoid
overflow after sanity checks. Include <limits.h> if available.
(INT_MAX): Define if necessary.
(d_make_template_param): Takes integer argument instead of long.
(d_make_function_param): Likewise.
(d_append_num): Likewise.
(d_identifier): Likewise.
(d_number): Parse as and return integer.
(d_compact_number): Handle overflow.
(d_source_name): Change variable type to integer for parsed number.
(d_java_resource): Likewise.
(d_special_name): Likewise.
(d_discriminator): Likewise.
(d_unnamed_type): Likewise.
* testsuite/demangle-expected: Add regression test cases.
Modified:
trunk/libiberty/ChangeLog
trunk/libiberty/cp-demangle.c
trunk/libiberty/testsuite/demangle-expected
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Subject: [Bug tree-optimization/70912] New: reassociation width needs to be aware of FMA, width of expression, and other architectural details
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Bug ID: 70912
Summary: reassociation width needs to be aware of FMA, width of
expression, and other architectural details
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Created attachment 38395
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38395&action=edit
test case
This is based on looking at trunk 235605 performance for ppc64le on a power8
system.
If you have an expression of the form
x = a*b+c*d+e*f+g*h ...
With reassociation width 1, you get a single multiply in front followed by a
series of dependent multiply-adds. A natural consequence of doing reassociation
with width > 1 is that you need to peel additional multiplies off of the front
and do additional adds at the end to bring together the final result. But if
you have too few overall terms, the cost of additional serialization vs the
fused multipy add eats up the gain you might get from the parallelism in the
middle.
Some real numbers for this compiler and power8, using --param
tree-reassoc-width=N to set the max width. Rows are width 1,2,4 and columns are
increasing numbers of terms i.e. "a*b+c*d" would be 4 terms. Table values are
reduction in runtime.
8 12 16 32
1 0.00% 0.00% 0.00% 0.00%
2 -3.37% 4.34% 8.62% 22.83%
4 14.53% 31.47%
So for this arch we do not want to do this at all for the FMA case unless we
have at least 10 or 12 total terms. Looking at the reassoc pass output showed
it did not try more than width=2 for 8 or 12 terms.
I ran into this when putting together a reassociation_width function for the
rs6000 config. I couldn't see a way to avoid this behavior.
Another issue is that this is another place where we might want to modify
behavior based on local register pressure. We don't want to introduce a bunch
of new temps to do the parallel reassociation only to end up being unable to
allocate them.
>From gcc-bugs-return-523939-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 17:19:58 2016
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Subject: [Bug c/70910] error declaring a type in clause-1 of a for statement
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Joseph S. Myers <jsm28 at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #1 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
This is not a bug. See DR#277.
http://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_277.htm
>From gcc-bugs-return-523940-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 17:27:37 2016
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Subject: [Bug c/70911] Typo in "warning: initialized field with side-effects overwritten"
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Why do you think that "overwritten" is no appropriate here?
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From: "bernds at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70498] Libiberty Demangler segfaults (3)
Date: Mon, 02 May 2016 17:28:00 -0000
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Bernd Schmidt <bernds at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-523942-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 18:37:26 2016
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Subject: [Bug c++/62314] Fix-it Hints
Date: Mon, 02 May 2016 18:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62314
--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Mon May 2 18:36:40 2016
New Revision: 235777
URL: https://gcc.gnu.org/viewcvs?rev=235777&root=gcc&view=rev
Log:
PR c++/62314: add fixit hint for missing "template <> " in explicit
specialization
gcc/cp/ChangeLog:
PR c++/62314
* parser.c (cp_parser_class_head): Capture the start location;
use it to emit a fix-it insertion hint when complaining
about missing "template <> " in explicit specializations.
gcc/testsuite/ChangeLog:
PR c++/62314
* g++.dg/pr62314.C: New test case.
Added:
trunk/gcc/testsuite/g++.dg/pr62314.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/parser.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/60561] ICE in gimplify_var_or_parm_decl, at gimplify.c:1721 for gfortran.dg/associate_1.f03
Date: Mon, 02 May 2016 18:59:00 -0000
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Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gerhard.steinmetz.fortran@t
| |-online.de
--- Comment #7 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
On my environment, the examples from comment 0 and comment 4
no longer give an ICE now.
$ gfortran-6 --version
GNU Fortran (SUSE Linux) 6.1.0 20160427 [gcc-6-branch revision 235475]
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Subject: [Bug fortran/70854] ICE in gfc_process_block_locals, at fortran/trans-decl.c:6447
Date: Mon, 02 May 2016 19:02:00 -0000
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--- Comment #2 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
As a side note, above examples are more or less a follow-up of pr67885.
---
As tested recently, some more examples from gfortran's testsuite
seem to be affected when running for example with -finit-local-zero
$ make check-fortran RUNTESTFLAGS="--target_board=unix/-finit-local-zero"
...
# of expected passes 38678
# of unexpected failures 293
# of expected failures 45
# of unresolved testcases 14
# of unsupported tests 407
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Subject: [Bug fortran/70913] New: ICE in gfc_encode_character, at fortran/target-memory.c:227
Date: Mon, 02 May 2016 19:04:00 -0000
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Bug ID: 70913
Summary: ICE in gfc_encode_character, at
fortran/target-memory.c:227
Product: gcc
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When len of string a is larger than len(c) :
$ cat z1.f90
program p
character(3), parameter :: a = 'abc'
type t
character :: c
end type
type t2
character :: q = transfer(t(a), 'b')
end type
type(t2) :: x
print *, x
end
$ gfortran-6 z1.f90
f951: internal compiler error: in gfc_encode_character, at
fortran/target-memory.c:227
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Subject: [Bug fortran/70913] ICE in gfc_encode_character, at fortran/target-memory.c:227
Date: Mon, 02 May 2016 19:05:00 -0000
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--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
For completeness, these variants compile without errors :
$ cat z2.f90
program p
type t
character :: c
end type
type t2
character :: q = transfer(t('a'), 'b')
end type
type(t2) :: x
print *, x
end
$ cat z3.f90
program p
type t
character(4) :: c
end type
type t2
character :: q = transfer(t('abc'), 'b')
end type
type(t2) :: x
print *, x
end
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70914] New: ICE in gimplify_var_or_parm_decl, at gimplify.c:1851 (and endless compilation)
Date: Mon, 02 May 2016 19:08:00 -0000
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Bug ID: 70914
Summary: ICE in gimplify_var_or_parm_decl, at gimplify.c:1851
(and endless compilation)
Product: gcc
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This case is interesting. On my environment with gfortran 6.1.0 20160427
and SUSE Linux 64 bit, this compilation runs forever :
$ cat z3.f90
program p
character(:), allocatable :: z
z = 'z'
z = z
z = z
z = z
print *, z
end
$ gfortran-6 -c z3.f90
# ...
$ cat z2.f90
program p
character(:), allocatable :: z
z = 'z'
z = z
z = z
print *, z
end
$ time timeout 10.0 gfortran-6 -c z2.f90
real 0m10.001s
And for the simplest case an ICE :
$ cat z1.f90
program p
character(:), allocatable :: z
z = 'z'
z = z
print *, z
end
$ gfortran-6 -c z1.f90
internal compiler error: in gimplify_var_or_parm_decl, at gimplify.c:1851
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/62314] Fix-it Hints
Date: Mon, 02 May 2016 19:10:00 -0000
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--- Comment #7 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Mon May 2 19:09:30 2016
New Revision: 235785
URL: https://gcc.gnu.org/viewcvs?rev=235785&root=gcc&view=rev
Log:
PR c++/62314: C++: add fixit hint to misspelled member names
When we emit a hint about a misspelled member name, it will slightly
aid readability if we use a fixit-hint to show the proposed
name in context within the source code (and in the future this
might support some kind of auto-apply in an IDE).
This patch adds such a hint to the C++ frontend, taking us from:
test.cc:10:15: error: 'struct foo' has no member named 'colour'; did you mean
'color'?
return ptr->colour;
^~~~~~
to:
test.cc:10:15: error: 'struct foo' has no member named 'colour'; did you mean
'color'?
return ptr->colour;
^~~~~~
color
gcc/cp/ChangeLog:
PR c++/62314
* typeck.c (finish_class_member_access_expr): When
giving a hint about a possibly-misspelled member name,
add a fix-it replacement hint.
gcc/testsuite/ChangeLog:
PR c++/62314
* g++.dg/spellcheck-fields-2.C: New test case.
Added:
trunk/gcc/testsuite/g++.dg/spellcheck-fields-2.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/typeck.c
trunk/gcc/testsuite/ChangeLog
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From: "ch3root at openwall dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70911] Typo in "warning: initialized field with side-effects overwritten"
Date: Mon, 02 May 2016 19:49:00 -0000
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--- Comment #2 from Alexander Cherepanov <ch3root at openwall dot com> ---
I think it's misleading. IMHO "overwritten" would describe the situation
when the first initializer is evaluated, the resulting value is written
to the field but then the second initializer overwrites the first value
with its own.
This impression is wrong even without side effects (i.g., for "warning:
initialized field overwritten [-Woverride-init]") because it implies
that this declaration:
struct { int x, y; } s = { .x = 1, .y = s.x, .x = 2 };
will set s.y to 1 while with gcc it will set it to 2.
The problem is worse with side effects because "overwritten" implies
that a value is overwritten but the side effects are occurred while with
gcc they didn't occur.
Hm, probably a noun is more important here than a verb. Field is
overwritten but initializer is overridden. And the warning is really
about initializer.
>From gcc-bugs-return-523950-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 19:54:41 2016
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Subject: [Bug libstdc++/67375] abi::__cxa_demangle crashes demangling a lambda
Date: Mon, 02 May 2016 19:54:00 -0000
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Jan van Dijk <j.v.dijk at tue dot nl> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |j.v.dijk at tue dot nl
--- Comment #1 from Jan van Dijk <j.v.dijk at tue dot nl> ---
Has this been fixed in the meantime? I tried to reproduce this on an x86_64 box
(OpenSuSE Tumbleweed) with both
g++ (SUSE Linux) 5.3.1 20160301 [gcc-5-branch revision 233849]
g++ (GCC) 7.0.0 20160502 (experimental)
Compilation with default options and running the test code does not dump core.
Output:
void
ccccc::DDDDDDDDDD::eeeeeeeeeeeeeeeeeeee<ccccc::FFFFFFFFFF>(ccccc::FFFFFFFFFF&)::{lambda()#1}*&
std::_AAA_AAAA::_M_bbbbbb<void
ccccc::DDDDDDDDDD::eeeeeeeeeeeeeeeeeeee<ccccc::FFFFFFFFFF>(void
ccccc::DDDDDDDDDD::eeeeeeeeeeeeeeeeeeee<ccccc::FFFFFFFFFF>(ccccc::FFFFFFFFFF&)::{lambda()#1}*&)::{lambda()#1}*>()
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Subject: [Bug rtl-optimization/70890] [7 regression] r235660 miscompiles stage2 compiler on ia64
Date: Mon, 02 May 2016 20:23:00 -0000
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Bill Seurer <seurer at linux dot vnet.ibm.com> changed:
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----------------------------------------------------------------------------
CC| |seurer at linux dot vnet.ibm.com
--- Comment #4 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
Revision 235660 also causes a segmentation fault for the spec2006 test case
416.gamess on powerpc64le.
-----------------------------------
Running Benchmarks
-----------------------------------
Running 416.gamess test base base_64 default
Commands to run:
-C
/home/seurer/gcc/cpu2006/benchspec/CPU2006/416.gamess/run/run_base_test_base_64.0000
-i exam29.config -o exam29.out -e exam29.err
../run_base_test_base_64.0000/gamess_base.base_64 (timed)
Specinvoke: /home/seurer/gcc/cpu2006/bin/specinvoke -d
/home/seurer/gcc/cpu2006/benchspec/CPU2006/416.gamess/run/run_base_test_base_64.0000
-e speccmds.err
-o speccmds.stdout -f speccmds.cmd -C -q
Issuing command '/home/seurer/gcc/cpu2006/bin/specinvoke -d
/home/seurer/gcc/cpu2006/benchspec/CPU2006/416.gamess/run/run_base_test_base_64.0000
-e speccmds
.err -o speccmds.stdout -f speccmds.cmd -C -q'
/home/seurer/gcc/cpu2006/bin/specinvoke -d
/home/seurer/gcc/cpu2006/benchspec/CPU2006/416.gamess/run/run_base_test_base_64.0000
-e speccmds.err -o speccmds.
stdout -f speccmds.cmd -C -q
Start command: Mon May 2 11:33:26 2016 (1462206806)
Stop command: Mon May 2 11:33:26 2016 (1462206806)
Elapsed time for command: 00:00:00 (0)
416.gamess: copy 0 non-zero return code (exit code=11, signal=0)
****************************************
Contents of exam29.err
****************************************
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
Segmentation fault (core dumped)
****************************************
>From gcc-bugs-return-523952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 20:32:42 2016
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Subject: [Bug c/70910] error declaring a type in clause-1 of a for statement
Date: Mon, 02 May 2016 20:32:00 -0000
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thanks for the pointer. That seems like a rather gratuitous restriction, and
an unnecessary deviation from the C++ rule where the feature originated. I'm
also not sure that the committee's response to the DR is a fully informed one:
the claim that the intent can clearly be derived from the requirement that "a
for statement shall only declare identifiers for objects having storage class
auto or register" doesn't sound right to me. I would expect the intent of the
requirement to be to prohibit defining loop control variables that are static
(and then have some such loops iterate only in the first invocation of the
function and not subsequent ones (*)). I'll have to see if I can dig up some
background on the intent in the committee reflector archives or meeting
minutes.
But given that it's explicitly disallowed, I think it's unfortunate that GCC
doesn't accept the test case as an extension because other popular compilers
do, including the latest EDG 3.10 in strict conformance mode, Oracle c99, and
IBM xlc (though the last one rejects the struct definition). With some more
testing, I see that Clang 3.8 rejects it. Intel icc rejects it because it uses
the EDG front end in GCC compatibility mode (where the latter rejects it for
compatibility with GCC).
[*] As in the following also apparently valid C++ program:
void f ()
{
for (static int i = 0; i < 10; ++i)
printf ("%i\n", i);
}
int main ()
{
f ();
f ();
}
>From gcc-bugs-return-523953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 20:34:33 2016
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Subject: [Bug ada/70900] [6 regression] a library-level class-wide subprogram is not generated into object file
Date: Mon, 02 May 2016 20:34:00 -0000
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Mon May 2 20:33:47 2016
New Revision: 235789
URL: https://gcc.gnu.org/viewcvs?rev=235789&root=gcc&view=rev
Log:
PR ada/70900
Backport from mainline
2016-04-18 Ed Schonberg <schonberg@adacore.com>
* sem_ch6.adb (Process_Formals): Do not set a delay freeze on
a subprogram that returns a class-wide type, if the subprogram
is a compilation unit, because otherwise gigi will treat the
subprogram as external, leading to link errors.
Modified:
branches/gcc-6-branch/gcc/ada/ChangeLog
branches/gcc-6-branch/gcc/ada/sem_ch6.adb
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Subject: [Bug ada/70900] [6 regression] a library-level class-wide subprogram is not generated into object file
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
This should work correctly again.
>From gcc-bugs-return-523955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 21:07:53 2016
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Subject: [Bug target/65317] [SH] Shifts used instead of and with const_int
Date: Mon, 02 May 2016 21:07:00 -0000
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--- Comment #5 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #4)
>
> What are the original instructions it tried to combine here?
(insn 7 4 8 2 (parallel [
(set (reg:SI 168 [ r ])
(lshiftrt:SI (reg/v:SI 165 [ a ])
(const_int 31 [0x1f])))
(clobber (reg:SI 147 t))
]) sh_tmp.cpp:6 136 {lshrsi3_n_clobbers_t}
(expr_list:REG_DEAD (reg/v:SI 165 [ a ])
(expr_list:REG_UNUSED (reg:SI 147 t)
(nil))))
(insn 8 7 13 2 (parallel [
(set (reg:SI 167)
(ashift:SI (reg:SI 168 [ r ])
(const_int 31 [0x1f])))
(clobber (reg:SI 147 t))
]) sh_tmp.cpp:7 118 {ashlsi3_n_clobbers_t}
(expr_list:REG_DEAD (reg:SI 168 [ r ])
(expr_list:REG_UNUSED (reg:SI 147 t)
(nil))))
> If the
> combined insn does not match (as here), combine tries to split it into
> two in various ways, but only if it started out with more than two insns.
> Now that we also check for insn cost we could change that (allow combining
> 2->2 if that reduces the rtx cost), but this will of course need testing
> everywhere. I'll see what I can do.
I was really thinking of just adding that special case for const_int vs. reg
operands. I.e. if the created insn doesn't match, and has some const_int
operands, replace const_int with reg in the insn and try again -- taking the
cost of the constant load into account would be nice, too. Not sure if other
targets would benefit from that...
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Subject: [Bug testsuite/70520] Incorrect child stack alignment in c-c++-common/asan/clone-test-1.c
Date: Mon, 02 May 2016 21:46:00 -0000
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--- Comment #5 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Mon May 2 21:45:34 2016
New Revision: 235790
URL: https://gcc.gnu.org/viewcvs?rev=235790&root=gcc&view=rev
Log:
Backport r265322 from llvm upstream
Since x86 psABIs require the function incoming stack must align at 16
bytes, child process stack passed to clone should be aligned at 16
bytes.
PR testsuite/70520
* c-c++-common/asan/clone-test-1.c (main): Align child process
stack to 16 bytes.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/c-c++-common/asan/clone-test-1.c
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Subject: [Bug gcov-profile/69004] Building t-engine on ARM fails during -fprofile-use stage
Date: Mon, 02 May 2016 22:00:00 -0000
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--- Comment #15 from PeteVine <tulipawn at gmail dot com> ---
After deleting physfs profile data I got a little further (using gcc 6.1.0):
../src/luajit2/src/lj_gc.c: In function ‘lj_mem_newgco’:
../src/luajit2/src/lj_gc.c:816:10: error: corrupted value profile: ic profile
counter (6968126 out of 6967697) inconsistent with basic-block count (6967697)
GCobj *o = (GCobj *)g->allocf(g->allocd, NULL, 0, size);
^
../src/luajit2/src/lj_gc.c: In function ‘lj_mem_realloc’:
../src/luajit2/src/lj_gc.c:803:5: error: corrupted value profile: ic profile
counter (7798609 out of 7798543) inconsistent with basic-block count (7798543)
p = g->allocf(g->allocd, p, osz, nsz);
~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/luajit2/src/lj_gc.c: In function ‘lj_gc_step_fixtop’:
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: profile data
is not flow-consistent
}
^
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 2-3 thought to be 952579
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 2-4 thought to be -2
../src/luajit2/src/lj_gc.c: In function ‘gc_onestep’:
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: profile data
is not flow-consistent
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 2-28 thought to be -10011
../src/luajit2/src/lj_gc.c: In function ‘gc_sweep’:
../src/luajit2/src/lj_gc.c:405:7: error: corrupted value profile: ic profile
counter (8004397 out of 8004387) inconsistent with basic-block count (8004387)
gc_freefunc[o->gch.gct - ~LJ_TSTR](g, o);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../src/luajit2/src/lj_gc.c: In function ‘gc_shrink’:
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: profile data
is not flow-consistent
}
^
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 4-5 thought to be -2
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 4-1 thought to be 2
../src/luajit2/src/lj_gc.c: In function ‘gc_traverse_tab’:
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: edge from 40
to 41 exceeds maximal count
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: profile data
is not flow-consistent
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 9-10 thought to be 354234
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 9-21 thought to be -7
../src/luajit2/src/lj_gc.c: In function ‘gc_mark_start’:
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: profile data
is not flow-consistent
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 2-3 thought to be 14165
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 2-4 thought to be -1
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 4-5 thought to be 14168
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 4-6 thought to be -1
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 7-8 thought to be 14167
../src/luajit2/src/lj_gc.c:838:1: error: corrupted profile info: number of
executions for edge 7-9 thought to be -2
>From gcc-bugs-return-523958-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 22:13:43 2016
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
Date: Mon, 02 May 2016 22:13:00 -0000
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--- Comment #15 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon May 2 22:12:54 2016
New Revision: 235792
URL: https://gcc.gnu.org/viewcvs?rev=235792&root=gcc&view=rev
Log:
PR target/49244
* gimple.c (gimple_builtin_call_types_compatible_p): Allow
char/short arguments promoted to int because of promote_prototypes.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple.c
>From gcc-bugs-return-523959-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 22:18:01 2016
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Subject: [Bug testsuite/70520] Incorrect child stack alignment in c-c++-common/asan/clone-test-1.c
Date: Mon, 02 May 2016 22:18:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for GCC 7.
>From gcc-bugs-return-523960-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 22:26:50 2016
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70915] New: Improve loading 0/-1 in VSX registers on PowerPC
Date: Mon, 02 May 2016 22:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70915
Bug ID: 70915
Summary: Improve loading 0/-1 in VSX registers on PowerPC
Product: gcc
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Right now, the GCC compiler uses XXLXOR to zero a VSX register, and XXLORC (on
power8 and above) to set a register to all 1's. It might be better to prefer to
use the Altivec registers and use a VSPLITSW instruction to load a 0 or -1.
If the register being set to 0/-1 is currently part of a long instruction that
has not completed, the XXLXOR or XXLORC would need to wait for the completion
of the register, even though it does not 'need' the value of the register.
For example, if you do a divide and store the result, and then immediately try
to clear the register to use it for something else, the store would be delayed
until the divide completes, and in this case the logical operation would also
be delayed.
>From gcc-bugs-return-523961-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 23:32:02 2016
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Subject: [Bug middle-end/49905] Better sanity checking on sprintf src & dest to produce warning for dodgy code ?
Date: Mon, 02 May 2016 23:32:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-02
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
5.1 and 6.1 warn on the first six out of the ten buffer overflows, and on Linux
the program aborts at runtime in __sprintf_chk.
GCC still doesn't diagnose any of the last four problems at compile time (e.g.,
in 'char buf [4]; sprintf (buf, "%s %s", "abc", "def");') It seems that this
class of problems could be handled by enhancing maybe_emit_sprintf_chk_warning
to loop over the format string, recognize more involved format strings with
embedded %s (and other simple directives), and count the number of characters
they emit for constant arguments. For slightly better compile-time coverage
the approach could even assume that simple non-string directives like %i result
in at least one character and compute an optimistic lower bound on the length
of the formatted string.
>From gcc-bugs-return-523962-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 02 23:52:34 2016
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Subject: [Bug c/45840] Enhance __builtin_object_size to return useful result when applied to T (*p)[N]
Date: Mon, 02 May 2016 23:52:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-02
Ever confirmed|0 |1
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with today's top of trunk (see the simple test case below). I think
a warning should (might?) be doable.
Since in both C and C++ a function that takes a pointer to an array of constant
size can be passed a pointer to an array of a different size (in C++ this
requires a cast) it's an open question whether this case should also trigger an
abort at runtime.
$ cat v.c && /home/msebor/build/gcc-trunk-git/gcc/xgcc
-B/home/msebor/build/gcc-trunk-git/gcc -O2 -Wall -Wextra -Wpedantic v.c &&
./a.out
inline void __attribute__ ((always_inline))
f (int (*pa)[3])
{
__builtin_printf ("%s: %zd\n", __func__, __builtin_object_size (*pa, 0));
}
void __attribute__ ((noclone, noinline))
g (int (*pa)[3])
{
__builtin_printf ("%s: %zd\n", __func__, __builtin_object_size (*pa, 0));
}
int main ()
{
int a [3];
int (*pa)[3] = &a;
__builtin_printf ("%s: %zd\n", __func__, __builtin_object_size (*pa, 0));
f (pa);
g (pa);
}
main: 12
f: 12
g: -1
>From gcc-bugs-return-523963-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 00:05:09 2016
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Subject: [Bug c/67793] Missing warning for C99 static array dimension mismatch
Date: Tue, 03 May 2016 00:05:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Last reconfirmed|2015-10-01 00:00:00 |2016-5-2
CC| |msebor at gcc dot gnu.org
Known to fail| |4.9.3, 5.3.0, 6.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
See also bug 45840 for a (somewhat remotely) related request involving pointers
to arrays.
I also think that warning on the test case in comment #1 would be a useful
enhancement. Not having tested it, though, I would worry that issuing a
warning on the test case in comment #0 by default (or with -Wall) would cause
too many false positives. I suppose it could be something to try.
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From: "helloqirun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70916] New: gcc ICE at -O3 on valid code on x86_64-linux-gnu in "tree_operand_check"
Date: Tue, 03 May 2016 00:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70916
Bug ID: 70916
Summary: gcc ICE at -O3 on valid code on x86_64-linux-gnu in
"tree_operand_check"
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: helloqirun at gmail dot com
Target Milestone: ---
The following valid code causes an ICE when compiled with the current gcc trunk
at only -O3 on x86_64-linux-gnu in both 32-bit and 64-bit modes.
It appears to be a 6 regression. Gcc-6.1 got an ICE at -O3 with seg fault.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 7.0.0 20160502 (experimental) [trunk revision 235753] (GCC)
$ gcc-trunk -O3 abc.c -c
abc.c: In function ‘fn1’:
abc.c:9:13: warning: initialization makes integer from pointer without a cast
[-Wint-conversion]
int m = l;
^
abc.c:14:24: warning: comparison of distinct pointer types lacks a cast
*e = (((*o = &g) != g) < h[c], 0) || k;
^~
abc.c:17:12: warning: assignment makes integer from pointer without a cast
[-Wint-conversion]
*e = h;
^
abc.c:6:6: internal compiler error: tree check: expected class ‘expression’,
have ‘constant’ (integer_cst) in tree_operand_check, at tree.h:3523
void fn1() {
^~~
0xe435a7 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
../../gcc/gcc/tree.c:9793
0x12f1f9d expr_check(tree_node*, char const*, int, char const*)
../../gcc/gcc/tree.h:3194
0x12f1f9d tree_operand_check(tree_node*, int, char const*, int, char const*)
../../gcc/gcc/tree.h:3523
0x12f1f9d vect_recog_mask_conversion_pattern
../../gcc/gcc/tree-vect-patterns.c:3677
0x12ec3c0 vect_pattern_recog_1
../../gcc/gcc/tree-vect-patterns.c:3851
0x12f13bd vect_pattern_recog(vec_info*)
../../gcc/gcc/tree-vect-patterns.c:4048
0xe07c77 vect_analyze_loop_2
../../gcc/gcc/tree-vect-loop.c:1847
0xe07c77 vect_analyze_loop(loop*)
../../gcc/gcc/tree-vect-loop.c:2264
0xe1e982 vectorize_loops()
../../gcc/gcc/tree-vectorizer.c:532
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.
$ cat abc.c
int a, b, c, d, i, k;
int static *e = &b, *j;
int **f;
int static ***g = &f;
int *h;
void fn1() {
for (;;) {
int l[1] = {};
int m = l;
for (; d; d--) {
int ****n;
int *****o = &n;
i = a & 7 ?: a;
*e = (((*o = &g) != g) < h[c], 0) || k;
if (*e) {
**n = &j;
*e = h;
}
}
}
}
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
Date: Tue, 03 May 2016 00:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49244
--- Comment #16 from Paolo Bonzini <bonzini at gnu dot org> ---
> This also suggests there's an error in the current x86_64 kernel implementation
> as the kernel bitops are supposed to operate on machine word-size locations, so
> it should be using BTSQ not BTSL
Why? Since bts adjust the memory address according to the bit number, btsl and
btsq are entirely the same instruction.
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Subject: [Bug target/65951] [AArch64] Will not vectorize 64bit integer multiplication
Date: Tue, 03 May 2016 00:35:00 -0000
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--- Comment #7 from Jim Wilson <wilson at gcc dot gnu.org> ---
Created attachment 38396
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38396&action=edit
patch to add a mulv2di3 pattern
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Subject: [Bug target/65951] [AArch64] Will not vectorize 64bit integer multiplication
Date: Tue, 03 May 2016 00:37:00 -0000
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--- Comment #8 from Jim Wilson <wilson at gcc dot gnu.org> ---
Created attachment 38397
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patch to use synth_mult to generate vector multiplies
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Subject: [Bug target/65951] [AArch64] Will not vectorize 64bit integer multiplication
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--- Comment #9 from Jim Wilson <wilson at gcc dot gnu.org> ---
Created attachment 38398
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testcase signed long multiply by constant
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Subject: [Bug target/65951] [AArch64] Will not vectorize 64bit integer multiplication
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--- Comment #10 from Jim Wilson <wilson at gcc dot gnu.org> ---
Created attachment 38399
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testcase unsigned long multiply by constant
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
Date: Tue, 03 May 2016 00:52:00 -0000
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--- Comment #17 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Tue May 3 00:51:30 2016
New Revision: 235801
URL: https://gcc.gnu.org/viewcvs?rev=235801&root=gcc&view=rev
Log:
2016-05-02 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Backport from mainline
PR libgfortran/70684
* gfortran.dg/list_read_14.f90: New test.
Backport from trunk.
PR libgfortran/70684
* io/list_read (check_buffers): Add '\r' to check for end of line.
Added:
branches/gcc-5-branch/gcc/testsuite/gfortran.dg/list_read_14.f90
Modified:
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/libgfortran/ChangeLog
branches/gcc-5-branch/libgfortran/io/list_read.c
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Subject: [Bug target/65951] [AArch64] Will not vectorize 64bit integer multiplication
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--- Comment #11 from Jim Wilson <wilson at gcc dot gnu.org> ---
I've spent some time looking at solutions to this problem.
One way to solve it is to simply add a mulv2di3 pattern to the aarch64 port.
The presence of a multiply pattern means we will go through expand_mult, and we
get the shift/add sequence generation automatically. The x86 port has a few
patterns like this. mulv2di3 can be implemented with 3 v4si multiplies, and 3
zip instructions, plus 2 adds that fold into multiply-add, and a shift. The
downside of this solution is that if we aren't multiplying by a constant, then
we get this long mulv2di3 sequence. On an APM/Mustang, for a loop that only
does a multiply, this sequence is much slower than 2 integer DImode multiplies,
and hence it is better to not vectorize in this case. This is probably not a
win in general.
Another way to solve it is to use the existing synth_mult code in expmed.c. We
can easily share the code that generates the algorithm in choose_mult_variant,
but expand_mult_const is very rtl specific, so I copied that part with a lot of
modification to general gimple. Again, testing on APM/Mustang, for a loop that
only does multiply, I found that a 2 instruction shift/add sequence is a win,
but a 3 instruction shift/add sequence is a lose. Since we already handle the
1 instruction case trivially, this appears to be a lot of work for not much
gain. This is probably a better solution than the above one if the amount of
new code is OK. This patch needs a bit more work to finish it, and will likely
need aarch64 rtx costs adjusted so that we get the best result for all targets.
There may be wins in cases where a loop does more than a simple multiply, where
the loop is not vectorized only because of the multiply. It isn't clear how to
quantify that.
For the original testcase, with constant 19594, this constant requires 9
operations. We can do that with 9 vector instructions, or 5 integer
instructions.
add x0, x1, x1, lsl 3
add x6, x0, x0, lsl 4
add x7, x1, x6, lsl 4
add x8, x1, x7, lsl 2
lsl x9, x8, 1
Since 5 integer instructions is likely more than twice as fast as 9 vector
operations on all aarch64 parts, we still won't vectorize this loop even if we
have synth mult support in the vectorizer. We still get an integer multiply
instruction, as that is faster than the 5 integer shift/add instructions, which
in turn is faster than the 9 vector shift/add instructions and the vector
multiply via 3 v4si multiplies.
I've attached work in progress patches for the two solutions to the PR, along
with testcases I'm using to verify the patches.
>From gcc-bugs-return-523972-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 01:36:41 2016
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From: "wilson at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/70917] New: out-of-date documentation for character set support and environment variables
Date: Tue, 03 May 2016 01:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70917
Bug ID: 70917
Summary: out-of-date documentation for character set support
and environment variables
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
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In the doc section Environment Variables Affecting GCC
https://gcc.gnu.org/onlinedocs/gcc-6.1.0/gcc/Environment-Variables.html#Environment-Variables
Near the bottom, it mentions that you can set LANG to C-JIS etc, but the code
that supported this was in mbchar.c, and that file was deleted in 2003.
It also mentions near the top that you can set LC_CTYPE, I found this support
in libcpp/charset.c, and it is disabled with an ifdef because it caused
problems with non-ascii names.
I think these two parts should be removed, or maybe LC_CTYPE commented out, and
maybe add a comment to libcpp/charset.c to re-add LC_CTYPE docs if it ever gets
re-enabled.
LC_MESSAGES seems correct.
LC_ALL refers to LC_CTYPE which is wrong if LC_CTYPE docs are removed,
otherwise it looks OK.
I'm not an expert in this area, so I'm not sure if I got this all right.
>From gcc-bugs-return-523973-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 02:55:33 2016
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From: "ljliang1990 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70918] New: Internal compiler error: Illegal instruction
Date: Tue, 03 May 2016 02:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70918
Bug ID: 70918
Summary: Internal compiler error: Illegal instruction
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
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Priority: P3
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Created attachment 38400
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38400&action=edit
Preprocessor file
Trying to install Postgres-XL 9.5r1 on my linux from scratch(LFS 7.7) and got
this "Internal compiler error: Illegal instruction" during make process in the
first step. After troubleshooting I notice the error occur whenever a
float/decimal value is encounter. Thus I wrote a simple C program to test my
assumption.
#include "stdio.h"
int main(){
double testval = 1938.3028;
printf("Output: %f\n", testval);
}
I ran this line to compile
$ gcc test.c -o textexe
and i got the error
test.c: In function 'main':
test.c:4:2: internal compiler error: Illegal instruction
double testval = 1938.3028;
^
0x87815f crash_signal
../../gcc-4.9.2/gcc/toplev.c:337
Please submit a full bug report,
Not sure if its I made a mistake during installation of GCC on my LFS or
hardware problem. Please help.
System used:
Linux debian7 3.2.0-4-amd64 #1 SMP Debian 3.2.68-1+deb7u1 x86_64 GNU/Linux
GCC version:
4.9.2
>From gcc-bugs-return-523974-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 03:24:50 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/70919] New: wrong code at -O1 on x86_64-linux-gnu in 32-bit mode
Date: Tue, 03 May 2016 03:24:00 -0000
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Bug ID: 70919
Summary: wrong code at -O1 on x86_64-linux-gnu in 32-bit mode
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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The current gcc trunk miscompiles the following code on x86_64-linux-gnu at -O1
(only) in the 32-bit mode (but on in 64-bit mode).
$ 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/7.0.0/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 7.0.0 20160502 (experimental) [trunk revision 235731] (GCC)
$
$ gcc-trunk -m32 -O0 small.c; ./a.out
$ gcc-trunk -m64 -O1 small.c; ./a.out
$
$ gcc-trunk -m32 -O1 small.c
$ ./a.out
Aborted (core dumped)
$
-------------------------------------------
#pragma pack(1)
struct S0
{
int f0:24;
};
struct S1
{
int f1;
} a;
int b, c;
char
fn1 (struct S1 p1)
{
return 0;
}
int
main ()
{
c = fn1 (a);
if (b)
{
struct S0 f[3][9] =
{ { { 0 }, { 0 }, { 1 }, { 1 }, { 0 }, { 0 }, { 0 }, { 1 }, { 1 } },
{ { 0 }, { 0 }, { 1 }, { 1 }, { 0 }, { 0 }, { 0 }, { 1 }, { 1 } },
{ { 0 }, { 0 }, { 1 }, { 1 }, { 0 }, { 0 }, { 0 }, { 1 }, { 1 } }
};
b = f[1][8].f0;
}
struct S0 g[3][9] =
{ { { 0 }, { 0 }, { 1 }, { 1 }, { 0 }, { 0 }, { 0 }, { 1 }, { 1 } },
{ { 0 }, { 0 }, { 1 }, { 1 }, { 0 }, { 0 }, { 0 }, { 1 }, { 1 } },
{ { 0 }, { 0 }, { 1 }, { 1 }, { 0 }, { 0 }, { 0 }, { 1 }, { 1 } }
};
if (g[1][8].f0 != 1)
__builtin_abort ();
return 0;
}
>From gcc-bugs-return-523975-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 03:33:19 2016
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Subject: [Bug middle-end/70920] New: if ((intptr_t)ptr == 0) doesn't get simplified to if (ptr == 0)
Date: Tue, 03 May 2016 03:33:00 -0000
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Bug ID: 70920
Summary: if ((intptr_t)ptr == 0) doesn't get simplified to if
(ptr == 0)
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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In the following test case, the call to baz remains in the final optimized code
even though it's dead code.
#include <stdint.h>
void bar (void);
void baz (void);
void
foo (int *a)
{
if ((intptr_t)a == 0)
{
bar ();
if (a)
baz ();
}
}
Should also be able to optimize compares against non-zero constants, e.g.
void
foo (int *a)
{
if ((intptr_t)a == 5)
{
bar ();
if (a != (int *)5)
baz ();
}
}
>From gcc-bugs-return-523976-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 03:43:01 2016
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Subject: [Bug rtl-optimization/70890] [7 regression] r235660 miscompiles stage2 compiler on ia64
Date: Tue, 03 May 2016 03:43:00 -0000
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |amodra at gmail dot com
--- Comment #5 from Alan Modra <amodra at gmail dot com> ---
Created attachment 38401
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38401&action=edit
patch under test
Andreas, please let me know if this cures the ia64 bootstrap problem. By
inspection the code looks good with this patch, but I don't have an ia64 system
to properly test the patch. I'm currently regression testing on
powerpc64le-linux and x86_64-linux.
>From gcc-bugs-return-523977-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 05:50:10 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/69196] [5/6/7 Regression] code size regression with jump threading at -O2
Date: Tue, 03 May 2016 05:50:00 -0000
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--- Comment #25 from Sebastian Huber <sebastian.huber@embedded-brains.de> ---
With GCC 6.1 there is now only a slight increase in code size compared to GCC
4.9. I am not sure if there is anything left to do on this PR.
sparc-rtems4.11-gcc --version
sparc-rtems4.11-gcc (GCC) 4.9.4 20150723 (prerelease) [master revision
022fc2d:bffd767:fd457cef14f3bc6673e90a2de80005feea743ab7]
Copyright (C) 2015 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.
sparc-rtems4.12-gcc --version
sparc-rtems4.12-gcc (GCC) 6.1.1 20160502 [gcc-6-branch revision
cf53985:351726f:7429c1e9312a17e16f7d5be217ca79b82e56d01b]
Copyright (C) 2016 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.
sparc-rtems4.11-gcc -c -O2 -o vprintk.4.11.o vprintk.i
sparc-rtems4.12-gcc -c -O2 -o vprintk.4.12.o vprintk.i
size vprintk.4.11.o
text data bss dec hex filename
688 0 0 688 2b0 vprintk.4.11.o
size vprintk.4.12.o
text data bss dec hex filename
785 0 0 785 311 vprintk.4.12.o
powerpc-rtems4.11-gcc --version
powerpc-rtems4.11-gcc (GCC) 4.9.4 20150723 (prerelease) [master revision
022fc2d:bffd767:fd457cef14f3bc6673e90a2de80005feea743ab7]
Copyright (C) 2015 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.
powerpc-rtems4.12-gcc --version
powerpc-rtems4.12-gcc (GCC) 6.1.1 20160502 [gcc-6-branch revision
cf53985:351726f:7429c1e9312a17e16f7d5be217ca79b82e56d01b]
Copyright (C) 2016 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.
powerpc-rtems4.11-gcc -c -O2 -o vprintk.4.11.o vprintk.i
powerpc-rtems4.12-gcc -c -O2 -o vprintk.4.12.o vprintk.i
size vprintk.4.11.o
text data bss dec hex filename
797 0 0 797 31d vprintk.4.11.o
size vprintk.4.12.o
text data bss dec hex filename
1005 0 0 1005 3ed vprintk.4.12.o
arm-rtems4.11-gcc --version
arm-rtems4.11-gcc (GCC) 4.9.4 20150723 (prerelease) [master revision
022fc2d:bffd767:fd457cef14f3bc6673e90a2de80005feea743ab7]
Copyright (C) 2015 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.
arm-rtems4.12-gcc --version
arm-rtems4.12-gcc (GCC) 6.1.1 20160502 [gcc-6-branch revision
cf53985:351726f:7429c1e9312a17e16f7d5be217ca79b82e56d01b]
Copyright (C) 2016 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.
arm-rtems4.11-gcc -c -O2 -o vprintk.4.11.o vprintk.i
arm-rtems4.12-gcc -c -O2 -o vprintk.4.12.o vprintk.i
size vprintk.4.11.o
text data bss dec hex filename
512 0 0 512 200 vprintk.4.11.o
size vprintk.4.12.o
text data bss dec hex filename
641 0 0 641 281 vprintk.4.12.o
>From gcc-bugs-return-523978-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 06:13:22 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70916] [6/7 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "tree_operand_check"
Date: Tue, 03 May 2016 06:13:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-03
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |6.2
Summary|gcc ICE at -O3 on valid |[6/7 Regression] gcc ICE at
|code on x86_64-linux-gnu in |-O3 on valid code on
|"tree_operand_check" |x86_64-linux-gnu in
| |"tree_operand_check"
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r230103.
>From gcc-bugs-return-523979-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 06:16:58 2016
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Subject: [Bug rtl-optimization/70919] [6/7 Regression] wrong code at -O1 on x86_64-linux-gnu in 32-bit mode
Date: Tue, 03 May 2016 06:16:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-03
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |6.2
Summary|wrong code at -O1 on |[6/7 Regression] wrong code
|x86_64-linux-gnu in 32-bit |at -O1 on x86_64-linux-gnu
|mode |in 32-bit mode
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r232506.
>From gcc-bugs-return-523980-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 06:19:24 2016
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Subject: [Bug c/70891] "register name not specified" for const qualified register variable
Date: Tue, 03 May 2016 06:19:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2016-05-03
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed. That is weird.
>From gcc-bugs-return-523981-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 06:45:40 2016
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Subject: [Bug tree-optimization/70916] [6/7 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "tree_operand_check"
Date: Tue, 03 May 2016 06:45:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
For the ICE the fix is easy:
--- tree-vect-patterns.c.jj1 2016-03-23 10:51:23.000000000 +0100
+++ tree-vect-patterns.c 2016-05-03 08:39:17.779229143 +0200
@@ -3673,8 +3673,10 @@ vect_recog_mask_conversion_pattern (vec<
if (!rhs1_type)
return NULL;
}
- else
+ else if (COMPARISON_CLASS_P (rhs1))
rhs1_type = TREE_TYPE (TREE_OPERAND (rhs1, 0));
+ else
+ return NULL;
vectype2 = get_mask_type_for_scalar_type (rhs1_type);
now to figure out why tree-if-conv.c actually emitted something = 1 ? op2 :
op3;
>From gcc-bugs-return-523982-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 06:46:05 2016
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Subject: [Bug rtl-optimization/70890] [7 regression] r235660 miscompiles stage2 compiler on ia64
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|ia64-*-* |ia64-*-*, powerpc64-linux
Priority|P3 |P1
Severity|normal |blocker
--- Comment #6 from Alan Modra <amodra at gmail dot com> ---
Looks like r235660 is responsible for a stage2 --with-cpu=power7 bootstrap
failure on powerpc64-linux too, when using r235800 source.
>From gcc-bugs-return-523983-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 07:01:39 2016
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
Date: Tue, 03 May 2016 07:01:00 -0000
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--- Comment #17 from dhowells at redhat dot com <dhowells at redhat dot com> ---
(In reply to Paolo Bonzini from comment #16)
> > ...
> > it should be using BTSQ not BTSL
>
> Why? Since bts adjust the memory address according to the bit number, btsl
> and btsq are entirely the same instruction.
I suppose that's fair - the actual implementation is entirely up to the arch.
Should Jakub's optimisation patch be fixed to generate BT?L rather than BT?Q
instructions?
>From gcc-bugs-return-523984-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 07:08:19 2016
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Subject: [Bug middle-end/49905] Better sanity checking on sprintf src & dest to produce warning for dodgy code ?
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--- Comment #4 from David Binderman <dcb314 at hotmail dot com> ---
Created attachment 38402
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38402&action=edit
C++ source code
>From gcc-bugs-return-523985-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 07:11:09 2016
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Subject: [Bug middle-end/49905] Better sanity checking on sprintf src & dest to produce warning for dodgy code ?
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--- Comment #5 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Martin Sebor from comment #3)
> 5.1 and 6.1 warn on the first six out of the ten buffer overflows, and on
> Linux the program aborts at runtime in __sprintf_chk.
>
> GCC still doesn't diagnose any of the last four problems at compile time
My local version does. Some tweeks to gcc/builtins.c. 69 formats understood.
> (e.g., in 'char buf [4]; sprintf (buf, "%s %s", "abc", "def");') It seems
> that this class of problems could be handled by enhancing
> maybe_emit_sprintf_chk_warning to loop over the format string, recognize
> more involved format strings with embedded %s (and other simple directives),
> and count the number of characters they emit for constant arguments.
Indeed. Anything it doesn't understand it can afford to ignore.
It is only computing a lower bound.
> For slightly better compile-time coverage the approach could even assume that
> simple non-string directives like %i result in at least one character and
> compute an optimistic lower bound on the length of the formatted string.
That's right - it could even take account of other things like field widths.
My local version can find all the problems mentioned in the original bug
report.
Speculative patch attached. It'll need a lot of work to get it up to the
required standard, but it gives the general idea and it's been working
happily locally for years over the code of Redhat Fedora Linux and some
other projects.
>From gcc-bugs-return-523986-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 07:23:12 2016
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
Date: Tue, 03 May 2016 07:23:00 -0000
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--- Comment #18 from dhowells at redhat dot com <dhowells at redhat dot com> ---
(In reply to Paolo Bonzini from comment #16)
> > This also suggests there's an error in the current x86_64 kernel implementation
> > as the kernel bitops are supposed to operate on machine word-size locations, so
> > it should be using BTSQ not BTSL
>
> Why? Since bts adjust the memory address according to the bit number, btsl
> and btsq are entirely the same instruction.
Actually, no. BTSL takes a 32-bit bit number, whereas BTSQ takes a 64-bit bit
number if I read the manual correctly.
So, since test_and_set_bit() in the kernel takes a long bit number, BTSQ is the
right thing to use.
In practice, I don't imagine this is likely to be a real problem. I don't
envision it as being likely that we will ever have a contiguous bitmap with
>=2^31 bits in it.
>From gcc-bugs-return-523987-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 07:57:30 2016
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Subject: [Bug c/70921] New: Initializer for sub-sub-object overrides whole initializer for sub-object
Date: Tue, 03 May 2016 07:57:00 -0000
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Bug ID: 70921
Summary: Initializer for sub-sub-object overrides whole
initializer for sub-object
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: ch3root at openwall dot com
Target Milestone: ---
Source code:
----------------------------------------------------------------------
#include <stdio.h>
int main()
{
struct s { int x, y; } s1 = { 1, 2 };
struct { struct s sub; } s2 = { s1, .sub.y = 4 };
printf("%d %d\n", s2.sub.x, s2.sub.y);
}
----------------------------------------------------------------------
Results:
----------------------------------------------------------------------
$ gcc -std=c11 -pedantic -Wall -Wextra example.c && ./a.out
0 4
----------------------------------------------------------------------
gcc version: gcc (GCC) 7.0.0 20160502 (experimental)
It seems wrong that the initializer for the .sub.y subsubobject overrides the
previously listed initializer for the whole .sub subobject, loosing explicit
initialization of .sub.x.
The relevant rule -- C11, 6.7.9p19: "The initialization shall occur in
initializer list order, each initializer provided for a particular subobject
overriding any previously listed initializer for the same subobject". It
doesn't seem to cover this example. But, at least, the lack of warnings from
gcc is wrong.
For comparison:
----------------------------------------------------------------------
$ clang -std=c11 -Weverything example.c && ./a.out
example.c:6:43: warning: subobject initialization overrides initialization of
other fields within its enclosing subobject [-Winitializer-overrides]
struct { struct s sub; } s2 = { s1, .sub.y = 4 };
^~~~~~
example.c:6:35: note: previous initialization is here
struct { struct s sub; } s2 = { s1, .sub.y = 4 };
^~
1 warning generated.
1 4
----------------------------------------------------------------------
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Subject: [Bug fortran/55901] [OOP] type is (character(len=*)) misinterpreted as array
Date: Tue, 03 May 2016 08:15:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
CC| |burnus at gcc dot gnu.org
--- Comment #17 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 60561 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-523988-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 08:15:37 2016
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Subject: [Bug fortran/60561] ICE in gimplify_var_or_parm_decl, at gimplify.c:1721 for gfortran.dg/associate_1.f03
Date: Tue, 03 May 2016 08:15:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This PR has been fixed between revisions r219797 (2015-01-17, ICE) and r219823
(2015-01-18). AFAICT it looks like a duplicate of pr55901 fixed by revision
r219814.
*** This bug has been marked as a duplicate of bug 55901 ***
>From gcc-bugs-return-523990-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 08:27:20 2016
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Subject: [Bug fortran/70913] ICE in gfc_encode_character, at fortran/target-memory.c:227
Date: Tue, 03 May 2016 08:27:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-03
Blocks| |34740
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.3.1 up to trunk (7.0).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=34740
[Bug 34740] -fbounds-check with TRANSFER misses out of bounds in array
assignment
>From gcc-bugs-return-523991-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 08:37:53 2016
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Subject: [Bug middle-end/70920] if ((intptr_t)ptr == 0) doesn't get simplified to if (ptr == 0)
Date: Tue, 03 May 2016 08:37:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Not sure about the non-zero constants though. At least
non-equality pointer compares are only valid for pointers to the same object.
This can be easily fixed with a new match.pd rule like
(for cmp (ne eq)
(simplify
(cmp (convert @0) INTEGER_CST@1)
(if (POINTER_TYPE_P (TREE_TYPE (@0)))
(cmp @0 (convert @1)))))
I wonder about the reverse transform when a is an integer and the cast is to
a pointer type. I suppose we should strip the cast there as well.
>From gcc-bugs-return-523992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 08:38:50 2016
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Subject: [Bug tree-optimization/70919] [6/7 Regression] wrong code at -O1 on x86_64-linux-gnu in 32-bit mode
Date: Tue, 03 May 2016 08:38:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-523993-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 08:39:55 2016
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Subject: [Bug c/70918] Internal compiler error: Illegal instruction
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
You likely made a mistake in building GCC.
>From gcc-bugs-return-523994-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 08:45:34 2016
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Subject: [Bug tree-optimization/70916] [6/7 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "tree_operand_check"
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70916
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> For the ICE the fix is easy:
> --- tree-vect-patterns.c.jj1 2016-03-23 10:51:23.000000000 +0100
> +++ tree-vect-patterns.c 2016-05-03 08:39:17.779229143 +0200
> @@ -3673,8 +3673,10 @@ vect_recog_mask_conversion_pattern (vec<
> if (!rhs1_type)
> return NULL;
> }
> - else
> + else if (COMPARISON_CLASS_P (rhs1))
> rhs1_type = TREE_TYPE (TREE_OPERAND (rhs1, 0));
> + else
> + return NULL;
>
> vectype2 = get_mask_type_for_scalar_type (rhs1_type);
>
> now to figure out why tree-if-conv.c actually emitted something = 1 ? op2 :
> op3;
I supoose its fold_build_cond_expr doesn't work reliably anymore for some
reason.
Ah, constant_or_ssa_name fails to handle invariant ADDR_EXPRs.
Index: gcc/tree-if-conv.c
===================================================================
--- gcc/tree-if-conv.c (revision 235738)
+++ gcc/tree-if-conv.c (working copy)
@@ -413,17 +413,9 @@ fold_or_predicates (location_t loc, tree
static bool
constant_or_ssa_name (tree n)
{
- switch (TREE_CODE (n))
- {
- case SSA_NAME:
- case INTEGER_CST:
- case REAL_CST:
- case COMPLEX_CST:
- case VECTOR_CST:
- return true;
- default:
- return false;
- }
+ if (TREE_CODE (n) == SSA_NAME
+ || is_gimple_min_invariant (n))
+ return true;
}
/* Returns either a COND_EXPR or the folded expression if the folded
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Subject: [Bug fortran/70854] ICE in gfc_process_block_locals, at fortran/trans-decl.c:6447
Date: Tue, 03 May 2016 08:47:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from gcc-5 up to trunk. Compiling the first test in comment 0 with
4.5 up to 4.9 gives an ICE even without -finit-*:
pr70854.f90:6:0: internal compiler error: in gfc_process_block_locals, at
fortran/trans-decl.c:5906
block
While compiling the second test in comment 0 with -finit-* does not give an
ICE, the linking fails with something such as
Undefined symbols for architecture x86_64:
"_a.3428", referenced from:
_MAIN__ in ccTNe8Tp.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70922] New: -Wparentheses warning should not complain about if-else from macro expansion
Date: Tue, 03 May 2016 08:57:00 -0000
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Bug ID: 70922
Summary: -Wparentheses warning should not complain about
if-else from macro expansion
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As described here:
https://sourceware.org/ml/gdb-patches/2016-04/msg00656.html
I upgraded my host compiler to GCC 6.1 and started getting some -Werror build
failures in gdb due to -Wparentheses, but the offending if-else structure came
from a macro expansion where the intended structure was obvious.
It's been suggested that the GCC warning is unhelpful there and a regression:
https://sourceware.org/ml/gdb-patches/2016-05/msg00003.html
Should -Wparentheses not trigger on such if-else structure coming from a macro
expansion?
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Subject: [Bug fortran/70914] ICE in gimplify_var_or_parm_decl, at gimplify.c:1851 (and endless compilation)
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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. Doesn't finish
#1 0x000000000086b1e1 in poplevel (keep=1, functionbody=0)
at /space/rguenther/src/svn/trunk/gcc/fortran/f95-lang.c:372
#2 0x000000000087c461 in gfc_finish_block (stmtblock=0x7fffffffda60)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans.c:250
#3 0x00000000008817a6 in trans_code (code=0x0, cond=<tree 0x0>)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans.c:1972
#4 0x00000000008817ea in gfc_trans_code (code=0x26c94c0)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans.c:1991
#5 0x00000000008b9696 in gfc_generate_function_code (ns=0x2748cf0)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans-decl.c:6154
#6 0x000000000088182e in gfc_generate_code (ns=0x2748cf0)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans.c:2008
#7 0x000000000081753e in translate_all_program_units (
gfc_global_ns_list=0x2748cf0)
at /space/rguenther/src/svn/trunk/gcc/fortran/parse.c:5613
#8 0x0000000000817b4b in gfc_parse_file ()
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Subject: [Bug tree-optimization/70912] reassociation width needs to be aware of FMA, width of expression, and other architectural details
Date: Tue, 03 May 2016 09:00:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
reassoc-width is kind of a hack. To get optimal sequences for the target you'd
need to do this during insn-scheduling (which ideally should happen together
with RA). Thus, make the scheduler able to re-associate ops.
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Subject: [Bug tree-optimization/56541] vectorizaton fails in conditional assignment of a constant
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--- Comment #3 from amker at gcc dot gnu.org ---
Author: amker
Date: Tue May 3 09:04:46 2016
New Revision: 235808
URL: https://gcc.gnu.org/viewcvs?rev=235808&root=gcc&view=rev
Log:
PR tree-optimization/56541
* doc/invoke.texi (@item max-tree-if-conversion-phi-args): New item.
* params.def (PARAM_MAX_TREE_IF_CONVERSION_PHI_ARGS): new param.
* tree-if-conv.c (MAX_PHI_ARG_NUM): new macro.
(any_complicated_phi): new static variable.
(aggressive_if_conv): delete.
(if_convertible_phi_p): support phis with more than two arguments.
(if_convertible_bb_p): remvoe check on aggressive_if_conv and
critical pred edges.
(ifcvt_split_critical_edges): support phis with more than two
arguments by checking new parameter. only split critical edges
if needed.
(tree_if_conversion): handle simd pragma marked loop using new
local variable aggressive_if_conv. check any_complicated_phi.
gcc/testsuite
PR tree-optimization/56541
* gcc.dg/tree-ssa/ifc-pr56541.c: new test.
* gcc.dg/vect/pr56541.c: new test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ifc-pr56541.c
trunk/gcc/testsuite/gcc.dg/vect/pr56541.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
trunk/gcc/params.def
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-if-conv.c
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Subject: [Bug tree-optimization/70923] [7 regression] gcc.dg/vect/pr60092.c etc. FAIL
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
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Subject: [Bug tree-optimization/70923] New: [7 regression] gcc.dg/vect/pr60092.c etc. FAIL
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Bug ID: 70923
Summary: [7 regression] gcc.dg/vect/pr60092.c etc. FAIL
Product: gcc
Version: 7.0
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Priority: P3
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Host: sparc*-sun-solaris2.*
Target: sparc*-sun-solaris2.*
Build: sparc*-sun-solaris2.*
Created attachment 38403
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38403&action=edit
pr60092.c.148t.vect
Between 20160425 and 20160429, a couple of testcases started to FAIL on
Solaris/SPARC, both
32 and 64-bit:
FAIL: gcc.dg/vect/pr60092-2.c -flto -ffat-lto-objects scan-tree-dump vect
"LOOP VECTORIZED"
FAIL: gcc.dg/vect/pr60092-2.c scan-tree-dump vect "LOOP VECTORIZED"
FAIL: gcc.dg/vect/pr60092.c -flto -ffat-lto-objects scan-tree-dump vect "LOOP
VECTORIZED"
FAIL: gcc.dg/vect/pr60092.c scan-tree-dump vect "LOOP VECTORIZED"
FAIL: gcc.dg/vect/slp-23.c -flto -ffat-lto-objects scan-tree-dump-times vect
"vectorizing stmts using SLP" 1
FAIL: gcc.dg/vect/slp-23.c scan-tree-dump-times vect "vectorizing stmts using
SLP" 1
FAIL: gcc.dg/vect/slp-35.c -flto -ffat-lto-objects scan-tree-dump-times vect
"vectorized 1 loops" 1
FAIL: gcc.dg/vect/slp-35.c -flto -ffat-lto-objects scan-tree-dump-times vect
"vectorizing stmts using SLP" 1
FAIL: gcc.dg/vect/slp-35.c scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/vect/slp-35.c scan-tree-dump-times vect "vectorizing stmts using
SLP" 1
As an example, I'm attaching the pr60092.c dump.
Rainer
>From gcc-bugs-return-524002-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 09:24:18 2016
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Subject: [Bug c/70924] New: Wrong position for "warning: missing braces around initializer [-Wmissing-braces]"
Date: Tue, 03 May 2016 09:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70924
Bug ID: 70924
Summary: Wrong position for "warning: missing braces around
initializer [-Wmissing-braces]"
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: ch3root at openwall dot com
Target Milestone: ---
Source code:
----------------------------------------------------------------------
int main()
{
struct { int w; struct { int x, y; } ss; } s = { 1, .ss = 2, 3 };
(void)s;
}
----------------------------------------------------------------------
Results:
----------------------------------------------------------------------
$ gcc -std=c11 -pedantic -Wall -Wextra -O3 test.c && ./a.out
test.c: In function ‘main’:
test.c:3:50: warning: missing braces around initializer [-Wmissing-braces]
struct { int w; struct { int x, y; } ss; } s = { 1, .ss = 2, 3 };
^
test.c:3:50: note: (near initialization for ‘s’)
----------------------------------------------------------------------
gcc version: gcc (GCC) 7.0.0 20160502 (experimental)
I think the position of the warning should be closer to "2, 3".
For comparison:
----------------------------------------------------------------------
$ clang -std=c11 -Weverything -O3 test.c && ./a.out
test.c:3:61: warning: suggest braces around initialization of subobject
[-Wmissing-braces]
struct { int w; struct { int x, y; } ss; } s = { 1, .ss = 2, 3 };
^~~~
{ }
1 warning generated.
----------------------------------------------------------------------
>From gcc-bugs-return-524003-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 09:36:31 2016
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Subject: [Bug rtl-optimization/44281] [4.9/5/6/7 Regression] Global Register variable pessimisation
Date: Tue, 03 May 2016 09:36:00 -0000
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--- Comment #26 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Author: bernds
Date: Tue May 3 09:35:42 2016
New Revision: 235809
URL: https://gcc.gnu.org/viewcvs?rev=235809&root=gcc&view=rev
Log:
Fix PR44281, bad RA with global regs.
PR rtl-optimization/44281
* hard-reg-set.h (struct target_hard_regs): New field
x_fixed_nonglobal_reg_set.
(fixed_nonglobal_reg_set): New macro.
* reginfo.c (init_reg_sets_1): Initialize it.
* ira.c (setup_alloc_regs): Use fixed_nonglobal_reg_set instead
of fixed_reg_set.
* df-scan.c (df_insn_refs_collect): Asms may reference global regs.
testsuite/
PR rtl-optimization/44281
* gcc.target/i386/pr44281.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr44281.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/df-scan.c
trunk/gcc/hard-reg-set.h
trunk/gcc/ira.c
trunk/gcc/reginfo.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-524004-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 09:41:44 2016
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Subject: [Bug rtl-optimization/44281] [4.9/5/6/7 Regression] Global Register variable pessimisation
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Bernd Schmidt <bernds at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
--- Comment #27 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-524005-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 09:44:17 2016
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Subject: [Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
Date: Tue, 03 May 2016 09:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526
--- Comment #25 from Jonathan Wakely <redi at gcc dot gnu.org> ---
std::aligned_storage has no equivalent of the addr() member function that would
need adjusting, it's just the union U part of the AlignedStorage2 type in
comment 23, where sizeof(T) is a template parameter, rather than T.
__gnu_cxx::__aligned_buffer<T> and __gnu_cxx::__aligned_membuf<T> are similar
to the class template discussed above, but if I understand the issue correctly,
they don't need adjusting because we don't misuse them.
We create objects in them with placement new, and we don't attempt to use the
aggregate copy (because that would obviously do the wrong thing). In fact I
don't think we ever try to copy those objects. The closest we get to copying
them would do something like:
void f(__gnu_cxx::__aligned_buffer<X> buf)
{
__gnu_cxx::__aligned_buffer<X> buf2;
X* x = ::new (buf2.addr()) X(*buf.ptr());
// use x
x->~X();
}
i.e. we create copies of the stored object using placement new, but don't copy
the aligned buffer objects themselves.
(In reply to Richard Biener from comment #20)
> (In reply to Jan de Mooij from comment #17)
> > So IIUC it's wrong to store to |typed| in the constructor, by doing this:
> >
> > *typed.addr() = reg;
> >
> > Why is that? Any suggestions on how to fix this on our end?
>
> No, it's valid to do that.
It's only valid because Register is a trivial type. Otherwise you'd be
assigning to an object which was never constructed, i.e. it's lifetime never
started.
In the general case the safe way to construct that object is with placement
new:
::new ((void*)typed.addr()) Register(reg);
This begins the lifetime of a Register object at the desired location.
>From gcc-bugs-return-524006-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 09:47:53 2016
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Subject: [Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
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--- Comment #26 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 3 May 2016, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70526
>
> --- Comment #25 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> std::aligned_storage has no equivalent of the addr() member function that would
> need adjusting, it's just the union U part of the AlignedStorage2 type in
> comment 23, where sizeof(T) is a template parameter, rather than T.
>
> __gnu_cxx::__aligned_buffer<T> and __gnu_cxx::__aligned_membuf<T> are similar
> to the class template discussed above, but if I understand the issue correctly,
> they don't need adjusting because we don't misuse them.
>
> We create objects in them with placement new, and we don't attempt to use the
> aggregate copy (because that would obviously do the wrong thing). In fact I
> don't think we ever try to copy those objects. The closest we get to copying
> them would do something like:
>
> void f(__gnu_cxx::__aligned_buffer<X> buf)
> {
> __gnu_cxx::__aligned_buffer<X> buf2;
> X* x = ::new (buf2.addr()) X(*buf.ptr());
> // use x
> x->~X();
> }
>
> i.e. we create copies of the stored object using placement new, but don't copy
> the aligned buffer objects themselves.
>
>
> (In reply to Richard Biener from comment #20)
> > (In reply to Jan de Mooij from comment #17)
> > > So IIUC it's wrong to store to |typed| in the constructor, by doing this:
> > >
> > > *typed.addr() = reg;
> > >
> > > Why is that? Any suggestions on how to fix this on our end?
> >
> > No, it's valid to do that.
>
> It's only valid because Register is a trivial type. Otherwise you'd be
> assigning to an object which was never constructed, i.e. it's lifetime never
> started.
>
> In the general case the safe way to construct that object is with placement
> new:
>
> ::new ((void*)typed.addr()) Register(reg);
>
> This begins the lifetime of a Register object at the desired location.
std::aligned_storage<T> has the requirement of a POD type T. So I
wondered about whether the intent was to make copying it by plain
assignment possible. Using std::memcpy() on the object would always
work at least as that is documented for POD types.
>From gcc-bugs-return-524007-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 09:49:14 2016
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Subject: [Bug libstdc++/70101] Allocator-extended priority_queue constructors are badly broken
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-03
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks. It's a good thing nobody uses those constructors then ;)
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
Date: Tue, 03 May 2016 09:56:00 -0000
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Pedro Alves <palves at redhat dot com> changed:
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----------------------------------------------------------------------------
CC| |palves at redhat dot com
--- Comment #1 from Pedro Alves <palves at redhat dot com> ---
Reproducer:
struct obj_section
{
void *the_bfd_section;
};
int condition;
struct obj_section sections[2];
struct obj_section *sections_end;
#define ALL_OBJFILE_OSECTIONS(objfile, osect) \
for (osect = sections; osect < sections_end; osect++) \
if (osect->the_bfd_section == 0) \
{ \
/* Nothing. */ \
} \
else
int
main ()
{
struct obj_section *osect;
if (condition)
ALL_OBJFILE_OSECTIONS (o, osect)
if (osect == sections_end)
return 0;
return 0;
}
>From gcc-bugs-return-524009-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 09:57:19 2016
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Subject: [Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
Date: Tue, 03 May 2016 09:57:00 -0000
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--- Comment #27 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #26)
> std::aligned_storage<T> has the requirement of a POD type T. So I
> wondered about whether the intent was to make copying it by plain
> assignment possible. Using std::memcpy() on the object would always
> work at least as that is documented for POD types.
It means that the aligned_storage<N>::type must be a POD type, not that you can
only store POD types in such buffers.
>From gcc-bugs-return-524010-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 09:58:46 2016
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Subject: [Bug middle-end/70526] [5/6 Regression] GCC 6 miscompiles Firefox JIT compiler
Date: Tue, 03 May 2016 09:58:00 -0000
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--- Comment #28 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(As I mentioned, std::aligned_storage takes a size as its template argument,
not a type, so it can't put requirements on a type T, since there is no type T
:)
>From gcc-bugs-return-524011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 09:58:57 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
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--- Comment #10 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Looks to me like epilogue_completed would be a good predicate. I'll put the
following in a bootstrap, let me know if you're OK with this patch.
Index: i386.md
===================================================================
--- i386.md (revision 235808)
+++ i386.md (working copy)
@@ -5196,12 +5196,13 @@ (define_split
;; Break partial reg stall for cvtsd2ss.
-(define_peephole2
+(define_split
[(set (match_operand:SF 0 "register_operand")
(float_truncate:SF
(match_operand:DF 1 "nonimmediate_operand")))]
"TARGET_SSE2 && TARGET_SSE_MATH
&& TARGET_SSE_PARTIAL_REG_DEPENDENCY
+ && epilogue_completed
&& optimize_function_for_speed_p (cfun)
&& SSE_REG_P (operands[0])
&& (!SSE_REG_P (operands[1])
@@ -5223,13 +5224,14 @@ (define_peephole2
;; Break partial reg stall for cvtss2sd.
-(define_peephole2
+(define_split
[(set (match_operand:DF 0 "register_operand")
(float_extend:DF
(match_operand:SF 1 "nonimmediate_operand")))]
"TARGET_SSE2 && TARGET_SSE_MATH
&& TARGET_SSE_PARTIAL_REG_DEPENDENCY
+ && epilogue_completed
&& optimize_function_for_speed_p (cfun)
&& SSE_REG_P (operands[0])
&& (!SSE_REG_P (operands[1])
|| REGNO (operands[0]) != REGNO (operands[1]))
>From gcc-bugs-return-524012-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 10:00:18 2016
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
Date: Tue, 03 May 2016 10:00:00 -0000
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--- Comment #2 from Pedro Alves <palves at redhat dot com> ---
I noticed that this triggers with C++, but not with C. (GDB recently switched
to building as C++ program by default.)
With g++ 20160407 (what I have handy):
$ /opt/gcc/bin/g++ parens.c -o parens -Wall -Wparentheses
parens.c: In function ‘int main()’:
parens.c:24:6: warning: suggest explicit braces to avoid ambiguous ‘else’
[-Wparentheses]
if (condition)
^
But with gcc (still 20160407):
$ /opt/gcc/bin/gcc parens.c -o parens -Wall -Wparentheses
$
Fedora 23's g++ 5.3.1 20160406 (Red Hat 5.3.1-6) does not warn:
$ g++ parens.c -o parens -Wall -Wparentheses
$
>From gcc-bugs-return-524013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 10:00:39 2016
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Subject: [Bug libstdc++/70898] Stateful Compare objects are very slow
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is being tracked as PR 51965
*** This bug has been marked as a duplicate of bug 51965 ***
>From gcc-bugs-return-524014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 10:00:51 2016
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Subject: [Bug libstdc++/51965] Redundant move constructions in heap algorithms
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What |Removed |Added
----------------------------------------------------------------------------
CC| |gccbugs at jbapple dot com
--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 70898 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-524015-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 10:04:03 2016
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Subject: [Bug libstdc++/70893] codecvt incorrectly decodes UTF-16be
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Кирилл from comment #2)
> ...
> Just realized its wrong endianness problem.
> codecvt_utf8_utf16 should assume utf16be by default, right? Apparently, no.
No. It works with the native endianness of the system, if I understand the spec
correctly. i.e. it's for converting between UTF-8 and in-memory UTF-16
sequences using the native endianness. But the spec is a total mess.
>From gcc-bugs-return-524016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 10:05:26 2016
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Subject: [Bug libstdc++/70893] codecvt incorrectly decodes UTF-16be
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
If you think there's a bug here please provide a testcase that compiles and
produces an incorrect result.
>From gcc-bugs-return-524017-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 10:05:58 2016
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
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--- Comment #3 from Pedro Alves <palves at redhat dot com> ---
> I noticed that this triggers with C++, but not with C. (GDB recently switched > to building as C++ program by default.)
I've built trunk now (gcc version 7.0.0 20160503), and I now get the same
warning on both C and C++.
>From gcc-bugs-return-524018-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 10:07:03 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Tue, 03 May 2016 10:07:00 -0000
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--- Comment #11 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Bernd Schmidt from comment #10)
> Looks to me like epilogue_completed would be a good predicate. I'll put the
> following in a bootstrap, let me know if you're OK with this patch.
I was testing exactly the same patch ;)
So, patch preapproved after the usual test cycle.
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Subject: [Bug libstdc++/70898] Stateful Compare objects are very slow
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #3)
> This is being tracked as PR 51965
PR 51965 seems to be about extra copies of the values, while this one is more
about extra copies of compare objects (then there are also extra copies of
iterators).
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Subject: [Bug libstdc++/67085] priority queue should not copy comparators when calling push_heap and pop_heap
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Marc pointed out this isn't the same issue as 51965, so reopening.
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Ah, then it's a dup of PR 67085 (which I had incorrectly marked as a dup of
51965).
*** This bug has been marked as a duplicate of bug 67085 ***
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Subject: [Bug libstdc++/67085] priority queue should not copy comparators when calling push_heap and pop_heap
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 70898 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-524023-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 10:30:44 2016
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Subject: [Bug rtl-optimization/70687] Undefined shift in change_zero_ext in combine.c
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--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Tue May 3 10:29:55 2016
New Revision: 235811
URL: https://gcc.gnu.org/viewcvs?rev=235811&root=gcc&view=rev
Log:
PR 70687: Use wide_int in combine.c:change_zero_ext
PR 70687 reports a case where combine.c mishandles integer modes
wider than unsigned HOST_WIDE_INT. I don't have a testcase since
the PR is just pointing out the hole.
Also, I think a ZERO_EXTEND of a vector mode could in principle satisfy
the subreg condition but wouldn't be equivalent to an AND. E.g.:
(zero_extend:V4DI (subreg:V4SI (reg:V4DI R) 0))
Tested on x86_64-linux-gnu.
gcc/
PR rtl-optimization/70687
* combine.c (change_zero_ext): Check for scalar modes. Use wide_int
instead of unsigned HOST_WIDE_INT.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/combine.c
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--- Comment #5 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Fixed on trunk.
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> $ make check-fortran RUNTESTFLAGS="--target_board=unix/-finit-local-zero"
> ...
> # of expected passes 38678
> # of unexpected failures 293
> # of expected failures 45
> # of unresolved testcases 14
> # of unsupported tests 407
On a patched trunk (7.0) I get
# of expected passes 38954
# of unexpected failures 53
# of expected failures 45
# of unresolved testcases 14
# of unsupported tests 396
none of the unexpected failures being related to this PR.
>From gcc-bugs-return-524027-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 11:32:55 2016
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From: "gentryx at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70925] New: Vectorized loop segfaults: read exceeds vector boundary
Date: Tue, 03 May 2016 11:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70925
Bug ID: 70925
Summary: Vectorized loop segfaults: read exceeds vector
boundary
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gentryx at gmx dot de
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I've stumbled across a case where may vectorize a loop and the resulting
assembly will cause a segfault when the read operation exceeds a vector
boundary. Only happens with -O3 and -march=native.
Tested compilers:
icpc 15.0.6: works
clang++ 3.8.0: works
g++-4.7.4: works
g++-4.8.5: works
g++-4.9.3: fails
g++-5.3.0: fails
System: Gentoo Linux (observed on other systems, too), Intel Core i7-6700HQ
Command line: g++-5.3.0 test_lfa_lgd.ii -o test -O3 -fno-strict-aliasing
-fwrapv -std=c++11 && ./test
Output: Segmentation fault. GDB disassembly of the segfault site:
=> 0x0000000000406612 <+22514>: vmovapd (%r11,%rcx,1),%ymm0
0x0000000000406618 <+22520>: add $0x1,%rdi
0x000000000040661c <+22524>: vmovups %xmm0,(%rsi,%rcx,1)
0x0000000000406621 <+22529>: vextractf128 $0x1,%ymm0,0x10(%rsi,%rcx,1)
0x0000000000406629 <+22537>: add $0x20,%rcx
0x000000000040662d <+22541>: cmp %rdi,%r12
0x0000000000406630 <+22544>: ja 0x406612 <main+22514>
Please let me know if I can provide any further details.
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Subject: [Bug c++/70925] Vectorized loop segfaults: read exceeds vector boundary
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Andreas Schaefer <gentryx at gmx dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gentryx at gmx dot de
--- Comment #1 from Andreas Schaefer <gentryx at gmx dot de> ---
Created attachment 38404
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38404&action=edit
Preprocessed source file for bug reproduction
Compression was necessary as original file is 5MB in size.
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Subject: [Bug target/49244] __sync or __atomic builtins will not emit 'lock bts/btr/btc'
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--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 3 11:37:25 2016
New Revision: 235813
URL: https://gcc.gnu.org/viewcvs?rev=235813&root=gcc&view=rev
Log:
PR target/49244
* tree-ssa-ccp.c: Include stor-layout.h and optabs-query.h.
(optimize_atomic_bit_test_and): New function.
(pass_fold_builtins::execute): Use it.
* optabs.def (atomic_bit_test_and_set_optab,
atomic_bit_test_and_complement_optab,
atomic_bit_test_and_reset_optab): New optabs.
* internal-fn.def (ATOMIC_BIT_TEST_AND_SET,
ATOMIC_BIT_TEST_AND_COMPLEMENT, ATOMIC_BIT_TEST_AND_RESET): New ifns.
* builtins.h (expand_ifn_atomic_bit_test_and): New prototype.
* builtins.c (expand_ifn_atomic_bit_test_and): New function.
* internal-fn.c (expand_ATOMIC_BIT_TEST_AND_SET,
expand_ATOMIC_BIT_TEST_AND_COMPLEMENT,
expand_ATOMIC_BIT_TEST_AND_RESET): New functions.
* doc/md.texi (atomic_bit_test_and_set@var{mode},
atomic_bit_test_and_complement@var{mode},
atomic_bit_test_and_reset@var{mode}): Document.
* config/i386/sync.md (atomic_bit_test_and_set<mode>,
atomic_bit_test_and_complement<mode>,
atomic_bit_test_and_reset<mode>): New expanders.
(atomic_bit_test_and_set<mode>_1,
atomic_bit_test_and_complement<mode>_1,
atomic_bit_test_and_reset<mode>_1): New insns.
* gcc.target/i386/pr49244-1.c: New test.
* gcc.target/i386/pr49244-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr49244-1.c
trunk/gcc/testsuite/gcc.target/i386/pr49244-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/builtins.h
trunk/gcc/config/i386/sync.md
trunk/gcc/doc/md.texi
trunk/gcc/internal-fn.c
trunk/gcc/internal-fn.def
trunk/gcc/optabs.def
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/70916] [6/7 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "tree_operand_check"
Date: Tue, 03 May 2016 11:39:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 3 11:38:38 2016
New Revision: 235814
URL: https://gcc.gnu.org/viewcvs?rev=235814&root=gcc&view=rev
Log:
PR tree-optimization/70916
* tree-vect-patterns.c (vect_recog_mask_conversion_pattern): Give up
if COND_EXPR rhs1 is neither SSA_NAME nor COMPARISON_CLASS_P.
* gcc.c-torture/compile/pr70916.c: New test.
Added:
trunk/gcc/testsuite/gcc.c-torture/compile/pr70916.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-patterns.c
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Subject: [Bug tree-optimization/70916] [6/7 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "tree_operand_check"
Date: Tue, 03 May 2016 11:43:00 -0000
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 3 11:43:06 2016
New Revision: 235815
URL: https://gcc.gnu.org/viewcvs?rev=235815&root=gcc&view=rev
Log:
PR tree-optimization/70916
* tree-if-conv.c (constant_or_ssa_name): Removed.
(fold_build_cond_expr): Use is_gimple_val instead of
constant_or_ssa_name.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-if-conv.c
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Subject: [Bug rtl-optimization/70467] Useless "and [esp],-1" emitted on AND with uint64_t variable
Date: Tue, 03 May 2016 11:46:00 -0000
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 3 11:45:04 2016
New Revision: 235816
URL: https://gcc.gnu.org/viewcvs?rev=235816&root=gcc&view=rev
Log:
PR rtl-optimization/70467
* config/i386/predicates.md (x86_64_hilo_int_operand,
x86_64_hilo_general_operand): New predicates.
* config/i386/constraints.md (Wd): New constraint.
* config/i386/i386.md (mode attr di): Use Wd instead of e.
(general_hilo_operand): New mode attr.
(add<mode>3, sub<mode>3): Use <general_hilo_operand>
instead of <general_operand>.
(*add<dwi>3_doubleword, *sub<dwi>3_doubleword): Use
x86_64_hilo_general_operand instead of <general_operand>.
* gcc.target/i386/pr70467-3.c: New test.
* gcc.target/i386/pr70467-4.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70467-3.c
trunk/gcc/testsuite/gcc.target/i386/pr70467-4.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/constraints.md
trunk/gcc/config/i386/i386.md
trunk/gcc/config/i386/predicates.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/70925] Vectorized loop segfaults: read exceeds vector boundary
Date: Tue, 03 May 2016 11:50:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Please show the output when you append -v to the command-line (to tell us
what -march=native expands to for you)
>From gcc-bugs-return-524034-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 11:56:24 2016
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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/70923] [7 regression] gcc.dg/vect/pr60092.c etc. FAIL
Date: Tue, 03 May 2016 11:56:00 -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| |2016-05-03
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think this is the x + x -> 2 * x canonicalization we now perform. That's bad
when the target cannot vectorize integer multiplication.
We have vect_recog_mult_pattern that should have triggered here but that
only tries replacement with LSHIFT_EXPR rather than also a simple plus
for 2 * x.
Likely caused by
2016-04-26 Marc Glisse <marc.glisse@inria.fr>
* genmatch.c (write_predicate): Add ATTRIBUTE_UNUSED.
* fold-const.c (fold_binary_loc): Remove 2 transformations
superseded by match.pd.
* match.pd (x+x -> x*2): Generalize to integers.
>From gcc-bugs-return-524035-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 12:06:50 2016
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Subject: [Bug target/70903] [4.9/5/6/7 Regression] wrong code with bfi @ aarch64 with -Os
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ktkachov at gcc dot gnu.org changed:
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--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed.
>From gcc-bugs-return-524036-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 12:20:34 2016
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Subject: [Bug target/70903] [4.9/5/6/7 Regression] wrong code with bfi @ aarch64 with -Os
Date: Tue, 03 May 2016 12:20:00 -0000
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
-fno-rerun-cse-after-loop "fixes" the tescase. cse2 is where it starts to go
wrong
>From gcc-bugs-return-524037-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 12:25:44 2016
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Subject: [Bug tree-optimization/70841] reassoc fails to handle FP division
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kugan at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |kugan at gcc dot gnu.org
--- Comment #2 from kugan at gcc dot gnu.org ---
Created attachment 38405
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38405&action=edit
prototype patch
Untested prototype patch.
>From gcc-bugs-return-524038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 12:29:49 2016
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Subject: [Bug target/70903] [4.9/5/6/7 Regression] wrong code with bfi @ aarch64 with -Os
Date: Tue, 03 May 2016 12:29:00 -0000
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--- Comment #3 from ktkachov at gcc dot gnu.org ---
Although, that seems to be exposing something else that's fishy, looking at the
combine dumps I see it combining:
(insn 19 42 20 2 (set (subreg:DI (reg:QI 94) 0)
(const_int 255 [0xff])) bfi.c:7 50 {*movdi_aarch64}
(nil))
(insn 20 19 21 2 (set (reg:DI 95)
(subreg:DI (reg:QI 94) 0)) bfi.c:7 50 {*movdi_aarch64}
(expr_list:REG_DEAD (reg:QI 94)
(expr_list:REG_EQUAL (const_int 255 [0xff])
(nil))))
into:
(insn 20 19 21 2 (set (reg:DI 95)
(const_int -1 [0xffffffffffffffff])) bfi.c:7 50 {*movdi_aarch64}
(expr_list:REG_EQUAL (const_int 255 [0xff])
(nil)))
That's where the -1 comes from. Need to see why the reg94 := 255 was
represented that way (with a subreg)
>From gcc-bugs-return-524039-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 12:46:34 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Tue, 03 May 2016 12:46:00 -0000
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--- Comment #12 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Bernd Schmidt from comment #10)
> Looks to me like epilogue_completed would be a good predicate. I'll put the
> following in a bootstrap, let me know if you're OK with this patch.
>
> Index: i386.md
> ===================================================================
> --- i386.md (revision 235808)
> +++ i386.md (working copy)
> @@ -5196,12 +5196,13 @@ (define_split
>
> ;; Break partial reg stall for cvtsd2ss.
>
> -(define_peephole2
> +(define_split
> [(set (match_operand:SF 0 "register_operand")
> (float_truncate:SF
> (match_operand:DF 1 "nonimmediate_operand")))]
> "TARGET_SSE2 && TARGET_SSE_MATH
> && TARGET_SSE_PARTIAL_REG_DEPENDENCY
> + && epilogue_completed
> && optimize_function_for_speed_p (cfun)
> && SSE_REG_P (operands[0])
> && (!SSE_REG_P (operands[1])
> @@ -5223,13 +5224,14 @@ (define_peephole2
>
> ;; Break partial reg stall for cvtss2sd.
>
> -(define_peephole2
> +(define_split
> [(set (match_operand:DF 0 "register_operand")
> (float_extend:DF
> (match_operand:SF 1 "nonimmediate_operand")))]
> "TARGET_SSE2 && TARGET_SSE_MATH
> && TARGET_SSE_PARTIAL_REG_DEPENDENCY
> + && epilogue_completed
> && optimize_function_for_speed_p (cfun)
> && SSE_REG_P (operands[0])
> && (!SSE_REG_P (operands[1])
> || REGNO (operands[0]) != REGNO (operands[1]))
I still see:
vcvtss2sd (%ecx,%eax,4), %xmm5, %xmm5
without vxorpd.
>From gcc-bugs-return-524040-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 12:53:06 2016
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Subject: [Bug c++/70925] Vectorized loop segfaults: read exceeds vector boundary
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--- Comment #3 from Andreas Schaefer <gentryx at gmx dot de> ---
Output of -v below:
gentryx@neuromancer ~ $ LANG=en g++-5.3.0 test_lfa_lgd.ii -v -o test -O3
-march=native -fno-strict-aliasing -fwrapv -std=c++11 && ./test
Using built-in specs.
COLLECT_GCC=/usr/bin/g++-5.3.0
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /var/tmp/portage/sys-devel/gcc-5.3.0/work/gcc-5.3.0/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/5.3.0
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/5.3.0
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/5.3.0/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/5.3.0/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/include/g++-v5
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/5.3.0/python
--enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt
--disable-werror --with-system-zlib --enable-nls --without-included-gettext
--enable-checking=release --with-bugurl=https://bugs.gentoo.org/
--with-pkgversion='Gentoo 5.3.0 p1.0, pie-0.6.5' --enable-libstdcxx-time
--enable-shared --enable-threads=posix --enable-__cxa_atexit
--enable-clocale=gnu --enable-multilib --with-multilib-list=m32,m64
--disable-altivec --disable-fixed-point --enable-targets=all --disable-libgcj
--enable-libgomp --disable-libmudflap --disable-libssp --disable-libcilkrts
--enable-lto --without-isl --enable-libsanitizer
Thread model: posix
gcc version 5.3.0 (Gentoo 5.3.0 p1.0, pie-0.6.5)
COLLECT_GCC_OPTIONS='-v' '-o' 'test' '-O3' '-march=native'
'-fno-strict-aliasing' '-fwrapv' '-std=c++11' '-shared-libgcc'
/usr/libexec/gcc/x86_64-pc-linux-gnu/5.3.0/cc1plus -fpreprocessed
test_lfa_lgd.ii -march=broadwell -mmmx -mno-3dnow -msse -msse2 -msse3 -mssse3
-mno-sse4a -mcx16 -msahf -mmovbe -maes -mno-sha -mpclmul -mpopcnt -mabm
-mno-lwp -mfma -mno-fma4 -mno-xop -mbmi -mbmi2 -mno-tbm -mavx -mavx2 -msse4.2
-msse4.1 -mlzcnt -mrtm -mhle -mrdrnd -mf16c -mfsgsbase -mrdseed -mprfchw -madx
-mfxsr -mxsave -mxsaveopt -mno-avx512f -mno-avx512er -mno-avx512cd
-mno-avx512pf -mno-prefetchwt1 -mclflushopt -mxsavec -mxsaves -mno-avx512dq
-mno-avx512bw -mno-avx512vl -mno-avx512ifma -mno-avx512vbmi -mno-clwb
-mno-pcommit -mno-mwaitx --param l1-cache-size=32 --param l1-cache-line-size=64
--param l2-cache-size=6144 -mtune=generic -quiet -dumpbase test_lfa_lgd.ii
-auxbase test_lfa_lgd -O3 -std=c++11 -version -fno-strict-aliasing -fwrapv
-fstack-protector-strong -o /tmp/ccM4vnw7.s
GNU C++11 (Gentoo 5.3.0 p1.0, pie-0.6.5) version 5.3.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version
3.1.3-p4, MPC version 1.0.3
warning: MPFR header version 3.1.3-p4 differs from library version 3.1.4.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++11 (Gentoo 5.3.0 p1.0, pie-0.6.5) version 5.3.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version
3.1.3-p4, MPC version 1.0.3
warning: MPFR header version 3.1.3-p4 differs from library version 3.1.4.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 920cffacca9080f34bc3ca7962bbc82b
COLLECT_GCC_OPTIONS='-v' '-o' 'test' '-O3' '-march=native'
'-fno-strict-aliasing' '-fwrapv' '-std=c++11' '-shared-libgcc'
/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../../../x86_64-pc-linux-gnu/bin/as
-v --64 -o /tmp/ccab7hZd.o /tmp/ccM4vnw7.s
GNU assembler version 2.25.1 (x86_64-pc-linux-gnu) using BFD version (Gentoo
2.25.1 p1.1) 2.25.1
COMPILER_PATH=/usr/libexec/gcc/x86_64-pc-linux-gnu/5.3.0/:/usr/libexec/gcc/x86_64-pc-linux-gnu/5.3.0/:/usr/libexec/gcc/x86_64-pc-linux-gnu/:/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/:/usr/lib/gcc/x86_64-pc-linux-gnu/:/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../../../x86_64-pc-linux-gnu/bin/
LIBRARY_PATH=/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/:/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../../../lib64/:/lib/../lib64/:/usr/lib/../lib64/:/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../../../x86_64-pc-linux-gnu/lib/:/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-o' 'test' '-O3' '-march=native'
'-fno-strict-aliasing' '-fwrapv' '-std=c++11' '-shared-libgcc'
/usr/libexec/gcc/x86_64-pc-linux-gnu/5.3.0/collect2 -plugin
/usr/libexec/gcc/x86_64-pc-linux-gnu/5.3.0/liblto_plugin.so
-plugin-opt=/usr/libexec/gcc/x86_64-pc-linux-gnu/5.3.0/lto-wrapper
-plugin-opt=-fresolution=/tmp/ccOcRXvk.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
--eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o
test /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../../../lib64/crt1.o
/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../../../lib64/crti.o
/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/crtbegin.o
-L/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0
-L/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../../../lib64 -L/lib/../lib64
-L/usr/lib/../lib64
-L/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../../../x86_64-pc-linux-gnu/lib
-L/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../.. /tmp/ccab7hZd.o -lstdc++ -lm
-lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/crtend.o
/usr/lib/gcc/x86_64-pc-linux-gnu/5.3.0/../../../../lib64/crtn.o
Speicherzugriffsfehler (Speicherabzug geschrieben)
>From gcc-bugs-return-524041-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 12:58:31 2016
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From: "boehme.marcel at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70926] New: Libiberty Demangler segfaults (5)
Date: Tue, 03 May 2016 12:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70926
Bug ID: 70926
Summary: Libiberty Demangler segfaults (5)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: boehme.marcel at gmail dot com
Target Milestone: ---
A write access violation on destination operand in the libiberty demangler
causes its host applications to crash. There are also two other read access
violations on source operand that are caused by the same problem (overflow when
parsing a number).
How to reproduce:
$valgrind c++filt 0__Ot2m02R5T0000500000
==86038== Invalid read of size 1
==86038== at 0x752150: do_type (cplus-dem.c:3729)
==86038== by 0x7640F5: do_arg (cplus-dem.c:4239)
==86038== by 0x7659D7: demangle_args (cplus-dem.c:4528)
==86038== by 0x778425: demangle_signature (cplus-dem.c:1645)
==86038== by 0x784701: internal_cplus_demangle (cplus-dem.c:1204)
==86038== by 0x74F572: cplus_demangle (cplus-dem.c:887)
==86038== by 0x406251: demangle_it (cxxfilt.c:62)
==86038== by 0x40582E: main (cxxfilt.c:227)
$ valgrind c++filt 0__GT50000000000_
==10196== Invalid read of size 8
==10196== at 0x7519A7: do_type (cplus-dem.c:3623)
==10196== by 0x763DB5: do_arg (cplus-dem.c:4249)
==10196== by 0x76568F: demangle_args (cplus-dem.c:4538)
==10196== by 0x778825: demangle_signature (cplus-dem.c:1653)
==10196== by 0x784961: internal_cplus_demangle (cplus-dem.c:1210)
==10196== by 0x74F582: cplus_demangle (cplus-dem.c:893)
==10196== by 0x406251: demangle_it (cxxfilt.c:62)
==10196== by 0x40582E: main (cxxfilt.c:227)
$ valgrind c++filt __t2m05B500000000000000000_
==13052== Invalid read of size 8
==13052== at 0x7541FF: do_type (cplus-dem.c:3798)
==13052== by 0x76B2B3: demangle_template.constprop.15 (cplus-dem.c:2241)
==13052== by 0x7761B7: demangle_signature (cplus-dem.c:1573)
==13052== by 0x784811: internal_cplus_demangle (cplus-dem.c:1210)
==13052== by 0x74F582: cplus_demangle (cplus-dem.c:893)
==13052== by 0x406251: demangle_it (cxxfilt.c:62)
==13052== by 0x40582E: main (cxxfilt.c:227)
Analysis: The demangler reads sometimes the value of an array index from the
mangled string. Now, it is checked whether it exceeds the array length.
However, the parsing can cause an overflow and the index is negative.
This vulnerability was found with a more efficient version of AFL.
I am preparing a patch.
>From gcc-bugs-return-524042-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:00:50 2016
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70925] Vectorized loop segfaults: read exceeds vector boundary
Date: Tue, 03 May 2016 13:00:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |trippels at gcc dot gnu.org
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Looks invalid:
libgeodecomp4/src/libgeodecomp/misc/testcell.h:415:117: runtime error: store to
misaligned address 0x0000022081ec for type 'double', which requires 8 byte
alignment
0x0000022081ec: note: pointer points here
01 01 01 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00
^
libgeodecomp4/src/libgeodecomp/misc/testcell.h:415:287: runtime error: store to
misaligned address 0x000002208692 for type 'struct Coord', which requires 4
byte alignment
0x000002208692: note: pointer points here
00 e8 88 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00
^
libgeodecomp4/src/libgeodecomp/misc/testcell.h:415:113: runtime error: store to
misaligned address 0x00000220876a for type 'struct CoordBox', which requires 4
byte alignment
0x00000220876a: note: pointer points here
05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00
^
libgeodecomp4/src/libgeodecomp/misc/testcell.h:415:120: runtime error: store to
misaligned address 0x00000220891a for type 'unsigned int', which requires 4
byte alignment
0x00000220891a: note: pointer points here
0a 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00
^
libgeodecomp4/src/libgeodecomp/misc/testcell.h:415:117: runtime error: load of
misaligned address 0x0000022081ec for type 'const double', which requires 8
byte alignment
0x0000022081ec: note: pointer points here
01 01 01 01 00 00 00 00 00 c0 7b 40 00 00 00 00 00 d0 7b 40 00 00 00 00 00
e0 7b 40 00 00 00 00
^
libgeodecomp4/src/libgeodecomp/misc/testcell.h:435:38: runtime error: reference
binding to misaligned address 0x000002208692 for type 'const struct Coord',
which requires 4 byte alignment
0x000002208692: note: pointer points here
00 e8 88 40 02 00 00 00 05 00 00 00 05 00 00 00 03 00 00 00 05 00 00 00 05
00 00 00 04 00 00 00
^
libgeodecomp4/src/libgeodecomp/misc/testcell.h:435:20: runtime error: load of
misaligned address 0x000002208692 for type 'const struct Coord', which requires
4 byte alignment
0x000002208692: note: pointer points here
00 e8 88 40 02 00 00 00 05 00 00 00 05 00 00 00 03 00 00 00 05 00 00 00 05
00 00 00 04 00 00 00
^
libgeodecomp4/src/libgeodecomp/misc/testcell.h:415:118: runtime error:
reference binding to misaligned address 0x00000220876a for type 'const struct
CoordBox', which requires 4 byte alignment
0x00000220876a: note: pointer points here
05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1e 00 00 00 14 00 00 00 0a
00 00 00 00 00 00 00
^
libgeodecomp4/src/libgeodecomp/misc/testcell.h:415:93: runtime error: load of
misaligned address 0x00000220876a for type 'const struct CoordBox', which
requires 4 byte alignment
0x00000220876a: note: pointer points here
05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 1e 00 00 00 14 00 00 00 0a
00 00 00 00 00 00 00
^
libgeodecomp4/src/libgeodecomp/misc/testcell.h:415:120: runtime error: load of
misaligned address 0x00000220891a for type 'const unsigned int', which requires
4 byte alignment
0x00000220891a: note: pointer points here
>From gcc-bugs-return-524044-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:03:54 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Tue, 03 May 2016 13:03:00 -0000
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--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Uroš Bizjak from comment #13)
> (In reply to H.J. Lu from comment #12)
>
> > I still see:
> >
> > vcvtss2sd (%ecx,%eax,4), %xmm5, %xmm5
> >
> > without vxorpd.
>
> Maybe vxorpd gets scheduled away from the insn? What is the name of the
> pattern?
We need to disable
define_split
[(set (match_operand 0 "any_fp_register_operand")
(float_extend (match_operand 1 "memory_operand")))]
"reload_completed
&& (GET_MODE (operands[0]) == TFmode
|| GET_MODE (operands[0]) == XFmode
|| GET_MODE (operands[0]) == DFmode)"
[(set (match_dup 0) (match_dup 2))]
{
for SF->DF.
>From gcc-bugs-return-524043-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:03:16 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
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--- Comment #13 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to H.J. Lu from comment #12)
> I still see:
>
> vcvtss2sd (%ecx,%eax,4), %xmm5, %xmm5
>
> without vxorpd.
Maybe vxorpd gets scheduled away from the insn? What is the name of the
pattern?
>From gcc-bugs-return-524045-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:08:28 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70903] [4.9/5/6/7 Regression] wrong code with bfi @ aarch64 with -Os
Date: Tue, 03 May 2016 13:08:00 -0000
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--- Comment #4 from ktkachov at gcc dot gnu.org ---
Basically at expand time we're expanding:
vector(32) unsigned char _4;
unsigned char _5;
_3 = {65535, _2};
_4 = VIEW_CONVERT_EXPR<vector(32) unsigned char>(_3);
_5 = BIT_FIELD_REF <_4, 8, 8>;
and we're getting:
(insn 17 16 18 (set (subreg:DI (reg:OI 91 [ D.2757 ]) 0)
(const_int 65535 [0xffff])) bfi.c:7 -1
(nil))
(insn 18 17 19 (set (subreg:DI (reg:OI 91 [ D.2757 ]) 8)
(subreg:DI (reg/v:OI 84 [ x ]) 0)) bfi.c:7 -1
(nil))
(insn 19 18 20 (set (subreg:DI (reg:QI 94) 0)
(zero_extract:DI (subreg:DI (reg:OI 91 [ D.2757 ]) 0)
(const_int 8 [0x8])
(const_int 8 [0x8]))) bfi.c:7 -1
(nil))
(insn 20 19 21 (set (reg:DI 95)
(subreg:DI (reg:QI 94) 0)) bfi.c:7 -1
(nil))
the various RTL optimizers propagate the 65535 through the subregs and
zero-extracts and it ends up as -1 (0xffffffffffffffff) in reg 95.
I'm not sure what path during expand expands this operation, but the subreg on
insn 20 is probably wrong, as we do care about the bits beyond QImode, we want
a zero_extend.
>From gcc-bugs-return-524046-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:08:54 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Tue, 03 May 2016 13:08:00 -0000
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--- Comment #15 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to H.J. Lu from comment #14)
> We need to disable
>
> define_split
> [(set (match_operand 0 "any_fp_register_operand")
> (float_extend (match_operand 1 "memory_operand")))]
> "reload_completed
> && (GET_MODE (operands[0]) == TFmode
> || GET_MODE (operands[0]) == XFmode
> || GET_MODE (operands[0]) == DFmode)"
> [(set (match_dup 0) (match_dup 2))]
> {
>
> for SF->DF.
Why? This splitter will eventually result in a move of 0.0 to a SSE register.
>From gcc-bugs-return-524047-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:34:17 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Tue, 03 May 2016 13:34:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed|2016-04-29 00:00:00 |2016-05-03
Ever confirmed|0 |1
--- Comment #16 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Uroš Bizjak from comment #15)
> (In reply to H.J. Lu from comment #14)
>
> > We need to disable
> >
> > define_split
> > [(set (match_operand 0 "any_fp_register_operand")
> > (float_extend (match_operand 1 "memory_operand")))]
> > "reload_completed
> > && (GET_MODE (operands[0]) == TFmode
> > || GET_MODE (operands[0]) == XFmode
> > || GET_MODE (operands[0]) == DFmode)"
> > [(set (match_dup 0) (match_dup 2))]
> > {
> >
> > for SF->DF.
> Why? This splitter will eventually result in a move of 0.0 to a SSE register.
This splitter is placed before the one we want. We have quite
a few similar splitters far apart and we lose the track. This
patch:
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 940dc20..dc46b16 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -3615,6 +3615,35 @@
FAIL;
})
+;; Break partial reg stall for cvtss2sd.
+
+(define_split
+ [(set (match_operand:DF 0 "register_operand")
+ (float_extend:DF
+ (match_operand:SF 1 "nonimmediate_operand")))]
+ "TARGET_SSE2 && TARGET_SSE_MATH
+ && TARGET_SSE_PARTIAL_REG_DEPENDENCY
+ && epilogue_completed
+ && optimize_function_for_speed_p (cfun)
+ && SSE_REG_P (operands[0])
+ && (!SSE_REG_P (operands[1])
+ || REGNO (operands[0]) != REGNO (operands[1]))
+ && (!EXT_REX_SSE_REG_P (operands[0])
+ || TARGET_AVX512VL)"
+ [(set (match_dup 0)
+ (vec_merge:V2DF
+ (float_extend:V2DF
+ (vec_select:V2SF
+ (match_dup 1)
+ (parallel [(const_int 0) (const_int 1)])))
+ (match_dup 0)
+ (const_int 1)))]
+{
+ operands[0] = lowpart_subreg (V2DFmode, operands[0], DFmode);
+ operands[1] = lowpart_subreg (V4SFmode, operands[1], SFmode);
+ emit_move_insn (operands[0], CONST0_RTX (V2DFmode));
+})
+
(define_split
[(set (match_operand 0 "any_fp_register_operand")
(float_extend (match_operand 1 "memory_operand")))]
works for me.
>From gcc-bugs-return-524048-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:41:16 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
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--- Comment #17 from H.J. Lu <hjl.tools at gmail dot com> ---
There are
;; %%% Kill these when call knows how to work out a DFmode push earlier.
(define_split
[(set (match_operand:DF 0 "push_operand")
(float_extend:DF (match_operand:SF 1 "fp_register_operand")))]
"reload_completed"
[(set (reg:P SP_REG) (plus:P (reg:P SP_REG) (const_int -8)))
(set (mem:DF (reg:P SP_REG)) (float_extend:DF (match_dup 1)))])
define_split
[(set (match_operand:DF 0 "register_operand")
(float_extend:DF
(match_operand:SF 1 "nonimmediate_operand")))]
"TARGET_USE_VECTOR_FP_CONVERTS
&& optimize_insn_for_speed_p ()
&& reload_completed && SSE_REG_P (operands[0])
&& (!EXT_REX_SSE_REG_P (operands[0])
|| TARGET_AVX512VL)"
;; It's more profitable to split and then extend in the same register.
(define_peephole2
[(set (match_operand:DF 0 "register_operand")
(float_extend:DF
(match_operand:SF 1 "memory_operand")))]
"TARGET_SPLIT_MEM_OPND_FOR_FP_CONVERTS
&& optimize_insn_for_speed_p ()
&& SSE_REG_P (operands[0])"
[(set (match_dup 2) (match_dup 1))
(set (match_dup 0) (float_extend:DF (match_dup 2)))]
"operands[2] = gen_rtx_REG (SFmode, REGNO (operands[0]));")
>From gcc-bugs-return-524049-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:44:01 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Tue, 03 May 2016 13:44:00 -0000
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--- Comment #18 from H.J. Lu <hjl.tools at gmail dot com> ---
For float_truncate,
(define_split
[(set (match_operand:SF 0 "register_operand")
(float_truncate:SF
(match_operand:DF 1 "nonimmediate_operand")))]
"TARGET_USE_VECTOR_FP_CONVERTS
&& optimize_insn_for_speed_p ()
&& reload_completed && SSE_REG_P (operands[0])
&& (!EXT_REX_SSE_REG_P (operands[0])
|| TARGET_AVX512VL)"
;; It's more profitable to split and then extend in the same register.
(define_peephole2
[(set (match_operand:SF 0 "register_operand")
(float_truncate:SF
(match_operand:DF 1 "memory_operand")))]
"TARGET_SPLIT_MEM_OPND_FOR_FP_CONVERTS
&& optimize_insn_for_speed_p ()
&& SSE_REG_P (operands[0])"
[(set (match_dup 2) (match_dup 1))
(set (match_dup 0) (float_truncate:SF (match_dup 2)))]
"operands[2] = gen_rtx_REG (DFmode, REGNO (operands[0]));")
>From gcc-bugs-return-524050-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:45:25 2016
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Subject: [Bug target/67763] [SH] Redirect conditional branches
Date: Tue, 03 May 2016 13:45:00 -0000
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--- Comment #1 from Oleg Endo <olegendo at gcc dot gnu.org> ---
A similar case in compiler/cg.c:
L52: <<<<
mov.l @r9+,r8
tst r8,r8
bf/s .L57
cmp/eq r11,r9
bra .L69 <<<<
nop
.align 1
.L54:
mov.l @r8,r8
tst r8,r8
bt/s .L69
cmp/eq r11,r9
.L57:
mov.l @(4,r8),r0
cmp/eq #3,r0
bf .L54
jsr @r10
mov r8,r4
mov.l @r8,r8
tst r8,r8
bf/s .L57
cmp/eq r11,r9
.align 2
.L69: <<<<
bf .L52 <<<<
mov.l .L66,r4
>From gcc-bugs-return-524051-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:50:19 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
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--- Comment #19 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
> This splitter is placed before the one we want. We have quite
> a few similar splitters far apart and we lose the track. This
> patch:
>
> diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
> index 940dc20..dc46b16 100644
> --- a/gcc/config/i386/i386.md
> +++ b/gcc/config/i386/i386.md
> @@ -3615,6 +3615,35 @@
> FAIL;
> })
>
> +;; Break partial reg stall for cvtss2sd.
> +
> +(define_split
> + [(set (match_operand:DF 0 "register_operand")
> + (float_extend:DF
...]
> works for me.
Did you mean to move the existing one rather than add a copy?
I don't know what you're trying to tell me with the two followup messages after
this.
>From gcc-bugs-return-524052-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:54:18 2016
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70873
--- Comment #20 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Bernd Schmidt from comment #19)
> > This splitter is placed before the one we want. We have quite
> > a few similar splitters far apart and we lose the track. This
> > patch:
> >
> > diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
> > index 940dc20..dc46b16 100644
> > --- a/gcc/config/i386/i386.md
> > +++ b/gcc/config/i386/i386.md
> > @@ -3615,6 +3615,35 @@
> > FAIL;
> > })
> >
> > +;; Break partial reg stall for cvtss2sd.
> > +
> > +(define_split
> > + [(set (match_operand:DF 0 "register_operand")
> > + (float_extend:DF
> ...]
>
> > works for me.
>
> Did you mean to move the existing one rather than add a copy?
Yes.
> I don't know what you're trying to tell me with the two followup messages
> after this.
We should exam those split/peephole patterns to check if their placements
and conditions are correct.
>From gcc-bugs-return-524053-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 13:56:56 2016
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Subject: [Bug c++/70906] [7 Regression] ice in add_expr, at tree.c:7925
Date: Tue, 03 May 2016 13:56:00 -0000
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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> ---
Having the same issue in Inkscape, reduction has been started.
Martin
>From gcc-bugs-return-524054-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 14:16:00 2016
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug preprocessor/70917] out-of-date documentation for character set support and environment variables
Date: Tue, 03 May 2016 14:16:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
Cf what I said in <https://gcc.gnu.org/ml/gcc/2015-10/msg00189.html>:
I think we should clearly update the documentation to reflect reality
regarding source file encoding, and leave it strictly for wrappers such as
"c99" to specify -finput-charset= options rather than leaving open the
possibility that GCC's own default might change in future.
>From gcc-bugs-return-524055-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 14:19:26 2016
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Subject: [Bug c/70921] Initializer for sub-sub-object overrides whole initializer for sub-object
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Joseph S. Myers <jsm28 at gcc dot gnu.org> changed:
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--- Comment #1 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
See my suggestions in bug 63944 of possible approaches for a fix.
*** This bug has been marked as a duplicate of bug 63944 ***
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Subject: [Bug c/63944] [DR#413] Partial overriding of nonconstant struct/union initializers with designated initializers
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Joseph S. Myers <jsm28 at gcc dot gnu.org> changed:
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CC| |ch3root at openwall dot com
--- Comment #3 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
*** Bug 70921 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-524057-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 14:44:28 2016
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Subject: [Bug rtl-optimization/70890] [7 regression] r235660 miscompiles stage2 compiler on ia64
Date: Tue, 03 May 2016 14:44:00 -0000
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--- Comment #7 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Tue May 3 14:43:35 2016
New Revision: 235825
URL: https://gcc.gnu.org/viewcvs?rev=235825&root=gcc&view=rev
Log:
PR70890, stage2 miscompilation
PR rtl-optimization/70890
* ira.c (combine_and_move_insns): When moving def_insn, remove
equivs on use_insn.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ira.c
>From gcc-bugs-return-524058-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 14:45:30 2016
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Subject: [Bug c/63944] [DR#413] Partial overriding of nonconstant struct/union initializers with designated initializers
Date: Tue, 03 May 2016 14:45:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This might be a hard nut to crack, but I'll give it a shot.
>From gcc-bugs-return-524059-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 15:11:32 2016
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From: "law at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/69196] [5/6/7 Regression] code size regression with jump threading at -O2
Date: Tue, 03 May 2016 15:11:00 -0000
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--- Comment #26 from Jeffrey A. Law <law at redhat dot com> ---
I'm planning to keep it open until I add the code to factor FSM path clones
with differing entry edges into a single FSM path clone. At that time we'll
want to look at this (and other) BZs to ensure that we've got the tuning nailed
down.
>From gcc-bugs-return-524060-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 15:30:01 2016
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From: "ch3root at openwall dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/63944] [DR#413] Partial overriding of nonconstant struct/union initializers with designated initializers
Date: Tue, 03 May 2016 15:30:00 -0000
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--- Comment #5 from Alexander Cherepanov <ch3root at openwall dot com> ---
Not sure this is relevant to static/automatic distinction mentioned above but
the following code uses a static struct, is accepted by gcc and exposes the
problem:
----------------------------------------------------------------------
#include <stdio.h>
static struct s {
struct sub {
int x, y;
} sub;
} s = (struct s){ (struct sub){1, 2}, .sub.y = 3 };
int main()
{
printf("%d %d\n", s.sub.x, s.sub.y);
}
----------------------------------------------------------------------
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Subject: [Bug c/63944] [DR#413] Partial overriding of nonconstant struct/union initializers with designated initializers
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--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
That's using the extension of allowing compound literals in static
initializers. Given that extension, we should fix such cases as well.
>From gcc-bugs-return-524062-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 15:52:39 2016
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Subject: [Bug target/70927] New: avx512dq instructions emitted even with -mavx512vl -mno-avx512dq
Date: Tue, 03 May 2016 15:52:00 -0000
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Bug ID: 70927
Summary: avx512dq instructions emitted even with -mavx512vl
-mno-avx512dq
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
#include <x86intrin.h>
void
f1 (__m128 x, __m128 y)
{
register __m128 a __asm ("xmm16"), b __asm ("xmm17");
a = x; b = y;
asm volatile ("" : "+v" (a), "+v" (b));
a = _mm_and_ps (a, b);
asm volatile ("" : "+v" (a));
}
void
f2 (__m128d x, __m128d y)
{
register __m128d a __asm ("xmm16"), b __asm ("xmm17");
a = x; b = y;
asm volatile ("" : "+v" (a), "+v" (b));
a = _mm_and_pd (a, b);
asm volatile ("" : "+v" (a));
}
void
f3 (__m256 x, __m256 y)
{
register __m256 a __asm ("xmm16"), b __asm ("xmm17");
a = x; b = y;
asm volatile ("" : "+v" (a), "+v" (b));
a = _mm256_and_ps (a, b);
asm volatile ("" : "+v" (a));
}
void
f4 (__m256d x, __m256d y)
{
register __m256d a __asm ("xmm16"), b __asm ("xmm17");
a = x; b = y;
asm volatile ("" : "+v" (a), "+v" (b));
a = _mm256_and_pd (a, b);
asm volatile ("" : "+v" (a));
}
emits with -O2 -mavx512vl -mno-avx512dq various AVX512DQ instructions.
>From gcc-bugs-return-524063-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 15:53:02 2016
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Subject: [Bug target/70927] avx512dq instructions emitted even with -mavx512vl -mno-avx512dq
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-03
CC| |kyukhin at gcc dot gnu.org
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Target Milestone|--- |6.2
Ever confirmed|0 |1
>From gcc-bugs-return-524064-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 15:57:16 2016
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Subject: [Bug target/70927] avx512dq instructions emitted even with -mavx512vl -mno-avx512dq
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38406
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38406&action=edit
gcc7-pr70927.patch
Untested fix.
>From gcc-bugs-return-524065-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 16:18:50 2016
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From: "fxcoudert at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/53600] Fatal Error: Can't open module file 'omp_lib.mod' for reading at (1).
Date: Tue, 03 May 2016 16:18:00 -0000
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Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed:
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--- Comment #2 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
These two bugs are unrelated: comment #1 is about user code not compiling, and
is probably related to the compilation architecture (Makefile? script?)
The original bug was reported in 2012 and has not been confirmed there. cygwin
binaries from other sources are fine, so I am closing this for now.
Please reopen with additional information if someone can still see and
reproduce the bug.
>From gcc-bugs-return-524066-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 16:21:06 2016
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Subject: [Bug libgomp/60670] omp.h may differ between multilibs
Date: Tue, 03 May 2016 16:21:00 -0000
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Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed:
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--- Comment #12 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
The Fortran module files are not installed in the right place, and that leads
to error upon compilation of valid user code (not finding the module files).
$ ls /usr/local/gfortran/lib/**/libgomp.dylib
/usr/local/gfortran/lib/i386/libgomp.dylib
/usr/local/gfortran/lib/libgomp.dylib
$ ls /usr/local/gfortran/lib/**/omp_lib.mod
/usr/local/gfortran/lib/gcc/x86_64-apple-darwin15/6.1.0/finclude/omp_lib.mod
It’s because the Makefile machinery is wrong. libgomp/Makefile.am has:
fincludedir = $(libdir)/gcc/$(target_alias)/$(gcc_version)/finclude
while the corresponding libgfortran has:
fincludedir =
$(libdir)/gcc/$(target_alias)/$(gcc_version)$(MULTISUBDIR)/finclude
notice the extra $(MULTISUBDIR).
>From gcc-bugs-return-524067-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 16:30:47 2016
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From: "kirillnow at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70893] codecvt incorrectly decodes UTF-16be
Date: Tue, 03 May 2016 16:30:00 -0000
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--- Comment #5 from Кирилл <kirillnow at gmail dot com> ---
(In reply to Jonathan Wakely from comment #3)
> (In reply to Кирилл from comment #2)
> > ...
> > Just realized its wrong endianness problem.
> > codecvt_utf8_utf16 should assume utf16be by default, right? Apparently, no.
>
> No. It works with the native endianness of the system, if I understand the
> spec correctly. i.e. it's for converting between UTF-8 and in-memory UTF-16
> sequences using the native endianness. But the spec is a total mess.
It makes no sense, because you can explicitly specify little_endian in the
template parameters, but not big_endian.
>From gcc-bugs-return-524068-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 16:49:51 2016
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
To fix this in the C FE, we need to pass around boolean saying whether the
location is from_macro_expansion_at...
But dunno, do we really want to *not* warn for this? :(
>From gcc-bugs-return-524069-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 17:15:28 2016
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Subject: [Bug libstdc++/70893] codecvt incorrectly decodes UTF-16be
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--- Comment #6 from Кирилл <kirillnow at gmail dot com> ---
(In reply to Jonathan Wakely from comment #4)
> If you think there's a bug here please provide a testcase that compiles and
> produces an incorrect result.
Here:
#include <iostream>
#include <string>
#include <locale>
#include <codecvt>
using namespace std;
//-------------------------------------------------------------------------------------------------
/** Extensively tested and works.*/
template<bool big_e> string my_utf16_to_utf8(const char *s, size_t sz)
{
uint32_t ucs=0; sz &= ~1; //odd sizes are rounded down
string rtv; rtv.resize(sz+sz/2);
char* o=&rtv[0];
for(const uint8_t *i=(uint8_t*)s, *e=i+sz; i<e; i+=2, ++o)
{
ucs = uint32_t(i[!big_e])<<8 | i[big_e];
if((ucs&0xFC00)==0xD800 && i+2<e && (i[2+!big_e]&0xFC)==0xDC)
{
i+=2; ucs &= 0x03FF;
ucs = (ucs<<10 | uint32_t(i[!big_e]&3)<<8 | i[big_e]) + 0x010000;
} //pass standalone surrogates as-is
if(ucs&(~0x7FF))
{
if(ucs&(~0xFFFF))
{
*o=ucs>>18|0xF0; ++o; *o=(ucs>>12 & 0x3F)|0x80; ++o;
*o=(ucs>>6 & 0x3F)|0x80; ++o; *o=(ucs&0x3F)|0x80;
}
else
{ *o=ucs>>12|0xE0; ++o; *o=(ucs>>6&0x3F)|0x80; ++o; *o=(ucs&0x3F)|0x80;
}
}
else
{
if(ucs&(~0x7F)) { *o=ucs>>6|0xC0; ++o; *o=(ucs&0x3F)|0x80; }
else *o = ucs;
}
// if((o-&rtv[0]>=rtv.size()) throw range_error("utf16_to_utf8()"); //debug
}
rtv.resize(o-&rtv[0]); rtv.shrink_to_fit();
return rtv;
}
//-------------------------------------------------------------------------------------------------
template<bool big_e> inline std::string std_utf16_to_utf8(const char *s, size_t
sz)
{
using namespace std; sz &= ~1;
wstring_convert<codecvt_utf8_utf16
<char16_t, 0x10ffff, (big_e)?(codecvt_mode)0:little_endian>, char16_t>
conv;
try
{ return conv.to_bytes((const char16_t*)s, (const char16_t*)(s+sz)); }
catch(...) { return string{}; }
}
//-------------------------------------------------------------------------------------------------
int main(int argc, const char** argv)
{
static constexpr const uint8_t txt_utf16be[] = {
0x01, 0x31, 0x00, 0x6e, 0x00, 0x74, 0x02, 0x59, 0x00, 0x67, 0x00, 0xe6,
0x00, 0x6c, 0x00, 0xe6, 0x00, 0x6b, 0x00, 0x74, 0x01, 0x31, 0x00, 0x63,
0x00, 0x2c, 0x00, 0x20, 0x00, 0x62, 0x00, 0x61, 0x01, 0x31, 0x00, 0x20,
0x00, 0xf0, 0x02, 0x59, 0x00, 0x20, 0x00, 0x62, 0x00, 0x69, 0x02, 0xd0,
0x00, 0x73, 0x00, 0x74, 0x00, 0x69, 0x00, 0x20, 0x00, 0x62, 0x02, 0x54,
0x01, 0x31, 0x00, 0x7a, 0x00, 0x0a, 0x00, 0x0a, 0x00, 0x6c, 0x01, 0x31,
0x00, 0x72, 0x01, 0x31, 0x00, 0x6b, 0x00, 0x73, 0x00, 0x20, 0x00, 0x74,
0x00, 0x72, 0x00, 0xe6, 0x00, 0x6e, 0x00, 0x73, 0x00, 0x6b, 0x00, 0x72,
0x00, 0x61, 0x01, 0x31, 0x00, 0x62, 0x00, 0x64, 0x00, 0x20, 0x01, 0x31,
0x00, 0x6e, 0x00, 0x74, 0x00, 0x75, 0x00, 0x20, 0x00, 0x69, 0x00, 0x70,
0x00, 0x61, 0x00, 0x20, 0x00, 0x6a, 0x00, 0x75, 0x02, 0xd0, 0x00, 0x73,
0x01, 0x31, 0x00, 0x6e, 0x00, 0x67, 0x00, 0x20, 0x00, 0xe6, 0x00, 0x6e,
0x00, 0x20, 0x00, 0x69, 0x02, 0xd0, 0x00, 0x73, 0x00, 0x74, 0x00, 0x20,
0x00, 0x6d, 0x01, 0x31, 0x00, 0x64, 0x00, 0x6c, 0x02, 0x59, 0x00, 0x6e,
0x00, 0x64, 0x00, 0x73, 0x00, 0x20, 0x00, 0xe6, 0x00, 0x6b, 0x00, 0x73,
0x02, 0x59, 0x00, 0x6e, 0x00, 0x74, 0x00, 0x20, 0x00, 0x62, 0x00, 0x61,
0x01, 0x31, 0x00, 0x20, 0x00, 0x72, 0x02, 0x52, 0x00, 0x62, 0x02, 0x59,
0x00, 0x74, 0x00, 0x20, 0x00, 0x62, 0x00, 0x72, 0x00, 0x65, 0x01, 0x31,
0x00, 0x64, 0x00, 0x69, 0x00, 0x0a, 0x00, 0x0a, 0x00, 0x73, 0x02, 0x52,
0x00, 0x72, 0x00, 0x69, 0x00, 0x20, 0x02, 0x59, 0x00, 0x62, 0x00, 0x61,
0x02, 0x8a, 0x00, 0x74, 0x00, 0x20, 0x00, 0xf0, 0x02, 0x59, 0x00, 0x20,
0x00, 0x6c, 0x00, 0xe6, 0x00, 0x6b, 0x00, 0x20, 0x02, 0x59, 0x00, 0x76,
0x00, 0x20, 0x00, 0x73, 0x00, 0x74, 0x00, 0x72, 0x02, 0x5b, 0x00, 0x73,
0x00, 0x20, 0x01, 0x31, 0x00, 0x6e, 0x00, 0x66, 0x02, 0x54, 0x02, 0xd0,
0x00, 0x6d, 0x00, 0x65, 0x01, 0x31, 0x02, 0x83, 0x02, 0x59, 0x00, 0x6e,
0x00, 0x2c, 0x00, 0x20, 0x00, 0x62, 0x02, 0x8c, 0x00, 0x74, 0x00, 0x20,
0x00, 0x73, 0x01, 0x31, 0x00, 0x6e, 0x00, 0x73, 0x00, 0x20, 0x00, 0xf0,
0x01, 0x31, 0x00, 0x73, 0x00, 0x20, 0x01, 0x31, 0x00, 0x7a, 0x00, 0x20,
0x02, 0x59, 0x00, 0x20, 0x00, 0x72, 0x00, 0xe6, 0x00, 0x70, 0x00, 0x20,
0x01, 0x31, 0x00, 0x74, 0x00, 0x20, 0x00, 0x77, 0x02, 0x8c, 0x00, 0x64,
0x02, 0x59, 0x00, 0x6e, 0x00, 0x74, 0x00, 0x20, 0x00, 0x62, 0x00, 0x69,
0x00, 0x20, 0x00, 0x0a, 0x00, 0x6d, 0x02, 0x8c, 0x02, 0xa7, 0x00, 0x20,
0x00, 0x6a, 0x00, 0x75, 0x02, 0xd0, 0x00, 0x73, 0x00, 0x0a, 0x00, 0x0a,
};
constexpr size_t txt_sz = (sizeof txt_utf16be)/(sizeof txt_utf16be[0]);
cout << "My conversion: " << endl;
cout << my_utf16_to_utf8<true>((char*)txt_utf16be, txt_sz) << endl;
cout << "Codecvt conversion: " << endl;
cout << std_utf16_to_utf8<true>((char*)txt_utf16be, txt_sz);
return 0;
}
>From gcc-bugs-return-524070-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 17:26:29 2016
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From: "palves at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
Date: Tue, 03 May 2016 17:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70922
--- Comment #5 from Pedro Alves <palves at redhat dot com> ---
There's no ambiguous else in sight, the macro is written that way to avoid
dangling if/else problems, and the indentation is correct. It very much looks
like a false positive to me.
>From gcc-bugs-return-524071-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 17:52:24 2016
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From: "meissner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70928] New: Load simple float constants via VSX operations on PowerPC
Date: Tue, 03 May 2016 17:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70928
Bug ID: 70928
Summary: Load simple float constants via VSX operations on
PowerPC
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: minor
Priority: P3
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With Power8 (and to a lesser extent Power7), we can create simple integer
values in VSX registers without doing a load in a few instructions (for example
-16..15 can be loaded with VSPLTIWS and VUPKHSW). If the code wants to use
these simple constants as floating point values, it is probably cheaper to load
the constants as integers and convert them to floating point, rather than
loading the constant from memory.
>From gcc-bugs-return-524072-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 18:04:28 2016
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Subject: [Bug c/70859] Bad column number in type-generic function errors
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70859
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue May 3 18:03:42 2016
New Revision: 235832
URL: https://gcc.gnu.org/viewcvs?rev=235832&root=gcc&view=rev
Log:
PR c/70859
* input.c (expansion_point_location): New function.
* input.h (expansion_point_location): Declare.
* c-common.c (builtin_function_validate_nargs): Add location
parameter. Use it.
(check_builtin_function_arguments): Add location and arguments
parameters. Use them.
* c-common.h (check_builtin_function_arguments): Update declaration.
* c-typeck.c (build_function_call_vec): Pass LOC and ARG_LOC down to
check_builtin_function_arguments.
* call.c (build_cxx_call): Pass location and vNULL down to
check_builtin_function_arguments.
* gcc.dg/pr70859.c: New test.
* gcc.dg/pr70859-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr70859-2.c
trunk/gcc/testsuite/gcc.dg/pr70859.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/c-family/c-common.h
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-typeck.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/call.c
trunk/gcc/input.c
trunk/gcc/input.h
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-524073-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 18:09:41 2016
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Subject: [Bug c/70859] Bad column number in type-generic function errors
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-524074-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 18:18:39 2016
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Subject: [Bug lto/70929] New: [4.9/5/6/7 regression] Cross-module inlining for functions having argument passed by reference is no longer working.
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Bug ID: 70929
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functions having argument passed by reference is no
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Product: gcc
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$ cat a.C
struct s
{
int a;
s() {a=1;}
~s() {}
};
int t(struct s s);
int main()
{
s s;
int v=t(s);
if (!__builtin_constant_p (v))
__builtin_abort ();
return 0;
}
$ cat b.C
struct s
{
int a;
s() {a=1;}
~s() {}
};
int t(struct s s)
{
return s.a;
}
$ gcc-4.6 -O3 -flto a.C b.C
$ ./a.out
$ /aux/hubicka/trunk-install/bin/gcc -O3 -flto a.C b.C
$ ./a.out
Aborted
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Alexander Cherepanov <ch3root at openwall dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ch3root at openwall dot com
--- Comment #8 from Alexander Cherepanov <ch3root at openwall dot com> ---
Seems to be fixed in gcc 6.
>From gcc-bugs-return-524076-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 18:41:22 2016
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Subject: [Bug target/70928] Load simple float constants via VSX operations on PowerPC
Date: Tue, 03 May 2016 18:41:00 -0000
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--- Comment #1 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Short sequences for the rest of -32 to 31 are possible also. The splats can be
done as follows.
x even, x in [-32,-18] U [16,30]:
vspltis[bhw] t, x
vaddu[bhw]m y, t, t
x odd, x in [17,31]:
vspltis[bhw] t, x-16
vspltis[bhw] u, -16
vsubu[bhw]m y, t, u
x odd, x in [-31,-17]:
vspltisw t, x+16
vspltisw u, -16
vadduwm y, t, u
These can then again be unpacked and converted to floating point. This may or
may not be preferable to a load, as the dependency chains start to get a bit
long.
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Subject: [Bug c++/70906] [7 Regression] ice in add_expr, at tree.c:7925
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 38407
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38407&action=edit
Reduced test-case
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Subject: [Bug fortran/70870] Segmentation violation in gfc_assign_data_value
Date: Tue, 03 May 2016 19:19:00 -0000
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--- Comment #2 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
A variant that aborts with this message directly :
$ gfortran-6 z1.f90
f951: internal compiler error: in gfc_assign_data_value, at fortran/data.c:449
$ cat z1.f90
program p
type t
integer :: n
end type
type(t), pointer :: z => null()
data z%n / 3 /
print *, z%n
end
---
A minimal change of z1.f90 immediately points to pr50410 :
$ cat z2.f90
program p
type t
integer :: n
end type
type(t), pointer :: z
data z%n / 3 /
print *, z%n
end
$ gfortran-6 z2.f90
f951: internal compiler error: in record_reference, at cgraphbuild.c:64
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/48776] ICE(segfault) after -stdù5 diagnostic error involving PROCEDURE
Date: Tue, 03 May 2016 19:21:00 -0000
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--- Comment #2 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
On my environment, the example from comment 0 compiles now without an ICE.
$ gfortran-6 --version
GNU Fortran (SUSE Linux) 6.1.1 20160502 [gcc-6-branch revision 235698]
$ gfortran-6 -std=f95 pr48776.f90
pr48776.f90:6:18:
procedure get1
1
Error: Fortran 2003: PROCEDURE statement at (1)
pr48776.f90:9:14:
integer :: h
1
Error: Procedure ‘h’ in generic interface 'get' at (1) is neither function nor
subroutine
pr48776.f90:10:13:
call set1 (get (h))
1
Error: There is no specific function for the generic ‘get’ at (1)
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Subject: [Bug fortran/67542] ICE on initializing type variable with a longer array
Date: Tue, 03 May 2016 19:24:00 -0000
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--- Comment #4 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
The ICE from above is gone a while ago.
$ gfortran-6 --version
GNU Fortran (SUSE Linux) 6.1.1 20160502 [gcc-6-branch revision 235698]
$ gfortran-6 -g -O0 -Wall -fcheck=all z1.f90
z1.f90:6:15:
type(t) :: x = t(1, ['a'])
1
Warning: Unused variable ‘x’ declared at (1) [-Wunused-variable]
z1.f90:7:15:
type(t) :: y = t(2, ['a', 'b'])
1
Warning: Unused variable ‘y’ declared at (1) [-Wunused-variable]
---
$ cat z3.f90
program p
character(1), parameter :: a(4) = ['a','b','c','d']
type t
integer :: n
character(2) :: c(3)
end type
type(t) :: x = t(1, a(1:2))
type(t) :: y = t(2, a(1:4))
type(t) :: z = t(3, a)
print *, x
print *, y
print *, z
end
$ gfortran-6 -g -O0 -Wall -fcheck=all z3.f90
$ a.out
1 a b
2 a b c
3 a b c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/67542] ICE on initializing type variable with a longer array
Date: Tue, 03 May 2016 19:26:00 -0000
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--- Comment #5 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
If not covered elsewhere, one problem is remaining.
Nondeterministic and depending on used options :
$ cat z4.f90
program p
character(1), parameter :: a(4) = ['a','b','c','d']
type t
integer :: n
character(2) :: c(3)
end type
type(t) :: x = t(4, [a])
print *, x
end
$ cat z5.f90
program p
character(1), parameter :: a(4) = ['a','b','c','d']
type t
integer :: n
character(2) :: c(3)
end type
type(t) :: x = t(4, [a(1:4)])
print *, x
end
$ cat z6.f90
program p
integer :: k
character(1), parameter :: a(4) = ['a','b','c','d']
type t
integer :: n
character(2) :: c(3)
end type
type(t) :: x = t(4, [(a(k),k=1,4)])
print *, x
end
$ gfortran-6 -O0 -g -Wall -fcheck=all z6.f90
internal compiler error: Segmentation fault
$ gfortran-7-20160501 -g z6.f90
internal compiler error: Segmentation fault
0xbf6ebf crash_signal
../../gcc/toplev.c:333
0x72f8c3 gfc_emit_parameter_debug_info
../../gcc/fortran/trans-decl.c:4894
0x6f9d3b do_traverse_symtree
../../gcc/fortran/symbol.c:3817
0x73eb65 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6328
0x6cabc0 translate_all_program_units
../../gcc/fortran/parse.c:5613
0x6cabc0 gfc_parse_file()
../../gcc/fortran/parse.c:5819
0x70ca32 gfc_be_parse_file
../../gcc/fortran/f95-lang.c:201
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From: "ch3root at openwall dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70930] New: VLAs in stucts in loop headers are not evaluated each iteration
Date: Tue, 03 May 2016 19:28:00 -0000
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Bug ID: 70930
Summary: VLAs in stucts in loop headers are not evaluated each
iteration
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
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Source code:
----------------------------------------------------------------------
#include <stdio.h>
int main()
{
int n, z;
// (1) `while` with a variably modified array type
n = 1;
while ((z = sizeof(char[n])) && n < 10) {
printf("%d ", z);
n++;
}
printf("\n");
// (2) `while` with a variably modified structure type
n = 1;
while ((z = sizeof(struct { char a[n]; })) && n < 10) {
printf("%d ", z);
n++;
}
printf("\n");
// (3) an equivalent for the latter with `goto`
n = 1;
{
loop:;
_Bool ctrl_expr = (z = sizeof(struct { char a[n]; })) && n < 10;
if (!ctrl_expr)
goto after_loop;
{
printf("%d ", z);
n++;
}
goto loop;
}
after_loop:
printf("\n");
}
----------------------------------------------------------------------
Results:
----------------------------------------------------------------------
$ gcc -std=c11 -Wall -Wextra -O3 test.c && ./a.out
1 2 3 4 5 6 7 8 9
1 1 1 1 1 1 1 1 1
1 2 3 4 5 6 7 8 9
----------------------------------------------------------------------
gcc version: gcc (GCC) 7.0.0 20160502 (experimental)
The testcase includes three separate tests.
(1) contains a straight VLA in a loop header (inside of sizeof). The output
from this part of the program ("1 2 3 4 5 6 7 8 9 ") shows that it's
reevaluated on each iteration. Fine.
(2) is the same but VLA is wrapped in a struct. The output ("1 1 1 1 1 1 1 1 1
") shows that it's not reevaluated. Not fine.
(3) is AFAICT an equivalent to (2) with respect to blocks, scopes and such. It
works fine.
Thus, it's the combination of loops and VLAs in structs which is broken.
>From gcc-bugs-return-524083-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 19:30:37 2016
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Subject: [Bug fortran/48776] ICE(segfault) after -stdù5 diagnostic error involving PROCEDURE
Date: Tue, 03 May 2016 19:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48776
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> On my environment, the example from comment 0 compiles now without an ICE.
With 6.1.0, I get
[Book15] f90/bug% gfortran pr48776.f90 -std=f95
pr48776.f90:2:18:
procedure get1
1
Error: Fortran 2003: PROCEDURE statement at (1)
'
(null):0: confused by earlier errors, bailing out
or
[Book15] f90/bug% gfortran pr48776.f90 -std=f95
pr48776.f90:2:18:
procedure get1
1
Error: Fortran 2003: PROCEDURE statement at (1)
pr48776.f90:5:14:
integer :: h
1
Error: Procedure 'h' in generic interface 'get' at (1) is neither function nor
subroutine
pr48776.f90:6:13:
call set1 (get (h))
1
Error: There is no specific function for the generic 'get' at (1)
So this PR seems to be another instance of non-deterministic error recovery.
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Subject: [Bug tree-optimization/70916] [6/7 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "tree_operand_check"
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 3 19:30:22 2016
New Revision: 235842
URL: https://gcc.gnu.org/viewcvs?rev=235842&root=gcc&view=rev
Log:
PR tree-optimization/70916
* tree-if-conv.c: Include cfganal.h.
(pass_if_conversion::execute): Call connect_infinite_loops_to_exit
and remove_fake_exit_edges around the optimization pass.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-if-conv.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70931] New: ICE with -g in native_encode_initializer, bei dwarf2out.c:17768
Date: Tue, 03 May 2016 19:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70931
Bug ID: 70931
Summary: ICE with -g in native_encode_initializer, bei
dwarf2out.c:17768
Product: gcc
Version: 6.1.1
Status: UNCONFIRMED
Severity: normal
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Up to now observed only with compile option -g.
Under the hoods possibly related to pr67542.
$ cat z1.f90
program p
type t
integer :: a
integer :: b(0)
end type
type(t), parameter :: z = t(1, [2])
print *, z
end
$ gfortran-6 -g -c z1.f90
internal compiler error: in native_encode_initializer, at dwarf2out.c:17767
$ gfortran-7-20160501 -g z1.f90
internal compiler error: in native_encode_initializer, at dwarf2out.c:17768
0x881dc0 native_encode_initializer
../../gcc/dwarf2out.c:17768
0x881982 native_encode_initializer
../../gcc/dwarf2out.c:17810
0x88ce15 tree_add_const_value_attribute
../../gcc/dwarf2out.c:17852
0x89aaef gen_const_die
../../gcc/dwarf2out.c:21258
0x89aaef gen_decl_die
../../gcc/dwarf2out.c:23404
0x89b82e dwarf2out_decl
../../gcc/dwarf2out.c:23954
0x8b2fc8 dwarf2out_early_global_decl
../../gcc/dwarf2out.c:23627
0x6f9d3b do_traverse_symtree
../../gcc/fortran/symbol.c:3817
0x73eb65 gfc_generate_function_code(gfc_namespace*)
../../gcc/fortran/trans-decl.c:6328
0x6cabc0 translate_all_program_units
../../gcc/fortran/parse.c:5613
0x6cabc0 gfc_parse_file()
../../gcc/fortran/parse.c:5819
0x70ca32 gfc_be_parse_file
../../gcc/fortran/f95-lang.c:201
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/70929] [4.9/5/6/7 regression] Cross-module inlining for functions having argument passed by reference is no longer working.
Date: Tue, 03 May 2016 19:33:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-03
Ever confirmed|0 |1
--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
This patch solves the testcase:
Index: cgraph.c
===================================================================
--- cgraph.c (revision 235839)
+++ cgraph.c (working copy)
@@ -59,6 +59,7 @@ along with GCC; see the file COPYING3.
#include "tree-chkp.h"
#include "context.h"
#include "gimplify.h"
+#include "stor-layout.h"
/* FIXME: Only for PROP_loops, but cgraph shouldn't have to know about this.
*/
#include "tree-pass.h"
@@ -3673,25 +3674,24 @@ gimple_check_call_args (gimple *stmt, tr
{
for (i = 0, p = parms; i < nargs; i++, p = TREE_CHAIN (p))
{
- tree arg;
/* If this is a varargs function defer inlining decision
to callee. */
if (!p)
break;
- arg = gimple_call_arg (stmt, i);
+
+ tree arg = gimple_call_arg (stmt, i);
+ tree type = TREE_VALUE (p);
+ if (POINTER_TYPE_P (arg)
+ && pass_by_reference (NULL, TYPE_MODE (type), type, true))
+ type = TREE_TYPE (type);
if (TREE_VALUE (p) == error_mark_node
|| arg == error_mark_node
- || TREE_CODE (TREE_VALUE (p)) == VOID_TYPE
- || (!types_compatible_p (TREE_VALUE (p), TREE_TYPE (arg))
- && !fold_convertible_p (TREE_VALUE (p), arg)))
+ || TREE_CODE (type) == VOID_TYPE
+ || (!types_compatible_p (type, TREE_TYPE (arg))
+ && !fold_convertible_p (type, arg)))
return false;
}
}
- else
- {
- if (nargs != 0)
- return false;
- }
return true;
}
and may be a resonable fix for release branches (where dropping the checks
completly seems somewhat risky).
This patch turns:
function not considered for inlining : 3 calls, 7035
freq, 0 count
caller is not optimized : 313 calls, 313000
freq, 0 count
function body not available : 169317 calls, 507288718
freq, 0 count
function not inlinable : 34230 calls, 14761634
freq, 0 count
function body can be overwritten at link time : 5875 calls, 3060659
freq, 0 count
--param large-function-growth limit reached : 1310 calls, 4501184
freq, 0 count
--param large-stack-frame-growth limit reached : 5369 calls, 6695641
freq, 0 count
--param max-inline-insns-single limit reached : 131 calls, 55952
freq, 0 count
--param max-inline-insns-auto limit reached : 62265 calls, 69467053
freq, 0 count
--param inline-unit-growth limit reached : 39900 calls, 25641347
freq, 0 count
recursive inlining : 7 calls, 100428
freq, 0 count
call is unlikely and code size would grow : 624745 calls, 748954066
freq, 0 count
mismatched arguments : 752 calls, 946732
freq, 0 count
mismatched declarations during linktime optimization: 1 calls, 900
freq, 0 count
thunk call : 20631 calls, 20631000
freq, 0 count
target specific option mismatch : 91 calls, 88969
freq, 0 count
optimization level attribute mismatch : 12371 calls, 3153202
freq, 0 count
callee refers to comdat-local symbols : 20 calls, 18065
freq, 0 count
unreachable : 13241 calls, 0
freq, 0 count
to:
function not considered for inlining : 3 calls, 7035
freq, 0 count
caller is not optimized : 313 calls, 313000
freq, 0 count
function body not available : 169708 calls, 507853259
freq, 0 count
function not inlinable : 34230 calls, 14761634
freq, 0 count
function body can be overwritten at link time : 5875 calls, 3060659
freq, 0 count
--param large-function-growth limit reached : 1310 calls, 4501184
freq, 0 count
--param large-stack-frame-growth limit reached : 5369 calls, 6695641
freq, 0 count
--param max-inline-insns-single limit reached : 131 calls, 55952
freq, 0 count
--param max-inline-insns-auto limit reached : 62265 calls, 69467053
freq, 0 count
--param inline-unit-growth limit reached : 39900 calls, 25641347
freq, 0 count
recursive inlining : 7 calls, 100428
freq, 0 count
call is unlikely and code size would grow : 624741 calls, 748933088
freq, 0 count
mismatched arguments : 372 calls, 382648
freq, 0 count
mismatched declarations during linktime optimization: 1 calls, 900
freq, 0 count
thunk call : 20631 calls, 20631000
freq, 0 count
target specific option mismatch : 91 calls, 88969
freq, 0 count
optimization level attribute mismatch : 12371 calls, 3153202
freq, 0 count
callee refers to comdat-local symbols : 20 calls, 18065
freq, 0 count
unreachable : 13241 calls, 0
freq, 0 count
So there are still about 350 calls that are rules out as uninlinable...
Honza
>From gcc-bugs-return-524087-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 19:33:21 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70931] ICE with -g in native_encode_initializer, bei dwarf2out.c:17768
Date: Tue, 03 May 2016 19:33:00 -0000
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--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
Whereas, these variants compile without problems :
$ cat z2.f90
program p
type t
integer :: b(0)
end type
type(t), parameter :: z = t([2])
print *, z
end
$ cat z3.f90
program p
type t
integer :: a
integer :: b(0)
end type
type(t), parameter :: z = t(1, 2)
print *, z
end
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70931] [4.9/5/6/7 Regression] ICE with -g in native_encode_initializer, bei dwarf2out.c:17768
Date: Tue, 03 May 2016 19:53:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |4.6.4, 4.7.3
Keywords| |ice-on-valid-code
Last reconfirmed| |2016-05-03
Ever confirmed|0 |1
Summary|ICE with -g in |[4.9/5/6/7 Regression] ICE
|native_encode_initializer, |with -g in
|bei dwarf2out.c:17768 |native_encode_initializer,
| |bei dwarf2out.c:17768
Known to fail| |4.8.5, 4.9.3, 5.3.0, 6.1.0,
| |7.0
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The code compiles with 4.6.4 and 4.7.3, but gives an ICE starting with 4.8 up
to trunk (7.0). The change occurred between revision r188694 (2012-06-16,
compiles) and r188914 (2012-06-24, ICE). The only change of dwarf2out.c in this
range is r188874.
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Subject: [Bug tree-optimization/70396] ICE on valid code at -O3 in 32-bit and 64-bit modes on x86_64-linux-gnu (in immed_wide_int_const, at emit-rtl.c:606)
Date: Tue, 03 May 2016 20:09:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Hi.
With the updated version of the compiler, I still get the ICE for:
$ cat tc.ii
void fn1() {
unsigned *a = 0;
for (int i; i; ++i) {
unsigned g(a[i] << 8 >> 24);
a[i] = g;
}
}
$ /home/marxin/bin/gcc2/lib/gcc/x86_64-pc-linux-gnu/7.0.0/cc1plus
-fpreprocessed tc.ii -march=haswell -mmmx -mno-3dnow -msse -msse2 -msse3
-mssse3 -mno-sse4a -mcx16 -msahf -mmovbe -maes -mno-sha -mpclmul -mpopcnt -mabm
-mno-lwp -mfma -mno-fma4 -mno-xop -mbmi -mbmi2 -mno-tbm -mavx -mavx2 -msse4.2
-msse4.1 -mlzcnt -mno-rtm -mno-hle -mrdrnd -mf16c -mfsgsbase -mno-rdseed
-mno-prfchw -mno-adx -mfxsr -mxsave -mxsaveopt -mno-avx512f -mno-avx512er
-mno-avx512cd -mno-avx512pf -mno-prefetchwt1 -mno-clflushopt -mno-xsavec
-mno-xsaves -mno-avx512dq -mno-avx512bw -mno-avx512vl -mno-avx512ifma
-mno-avx512vbmi -mno-clwb -mno-pcommit -mno-mwaitx -mno-clzero -mno-pku --param
l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=8192
-mtune=haswell -quiet -dumpbase tc.ii -O3
tc.ii:7:1: internal compiler error: in immed_wide_int_const, at emit-rtl.c:606
}
^
0xa4cf35 immed_wide_int_const(generic_wide_int<wide_int_ref_storage<false> >
const&, machine_mode)
../../gcc/emit-rtl.c:606
0x13929a9 change_zero_ext
../../gcc/combine.c:11111
0x13937d8 recog_for_combine
../../gcc/combine.c:11148
0x13a175d try_combine
../../gcc/combine.c:3503
0x13a6fc1 combine_instructions
../../gcc/combine.c:1288
0x13a6fc1 rest_of_handle_combine
../../gcc/combine.c:14348
0x13a6fc1 execute
../../gcc/combine.c:14391
Thanks
>From gcc-bugs-return-524090-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 20:48:42 2016
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From: "fxcoudert at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgomp/60670] omp.h may differ between multilibs
Date: Tue, 03 May 2016 20:48:00 -0000
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--- Comment #13 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
Showing how the module files are not found when a non default multilib is
chosen:
$ gfortran a.f90 -fopenmp
$ gfortran a.f90 -fopenmp -m32
a.f90:1:6:
use omp_lib
1
Fatal Error: Can't open module file ‘omp_lib.mod’ for reading at (1): No such
file or directory
compilation terminated.
$ cat a.f90
use omp_lib
end
>From gcc-bugs-return-524092-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 20:54:33 2016
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Subject: [Bug sanitizer/65479] sanitizer stack trace missing frames past #0 on powerpc64
Date: Tue, 03 May 2016 20:54:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|msebor at gcc dot gnu.org |unassigned at gcc dot gnu.org
--- Comment #17 from Martin Sebor <msebor at gcc dot gnu.org> ---
Unassigning myself since I'm not actively working on it anymore.
>From gcc-bugs-return-524091-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 20:54:04 2016
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Subject: [Bug libgomp/60670] omp.h may differ between multilibs
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Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
--- Comment #14 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
Based on libgfortran build machinery, the following patch should be applied to
libgomp:
Index: libgomp/Makefile.am
===================================================================
--- libgomp/Makefile.am (revision 235843)
+++ libgomp/Makefile.am (working copy)
@@ -10,7 +10,7 @@ config_path = @config_path@
search_path = $(addprefix $(top_srcdir)/config/, $(config_path)) $(top_srcdir)
\
$(top_srcdir)/../include
-fincludedir = $(libdir)/gcc/$(target_alias)/$(gcc_version)/finclude
+fincludedir =
$(libdir)/gcc/$(target_alias)/$(gcc_version)$(MULTISUBDIR)/finclude
libsubincludedir = $(libdir)/gcc/$(target_alias)/$(gcc_version)/include
vpath % $(strip $(search_path))
>From gcc-bugs-return-524093-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 21:00:33 2016
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Subject: [Bug c++/70906] [7 Regression] ice in add_expr, at tree.c:7925
Date: Tue, 03 May 2016 21:00:00 -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> ---
--- gcc/tree.c.jj 2016-05-03 10:00:25.000000000 +0200
+++ gcc/tree.c 2016-05-03 22:56:20.976817150 +0200
@@ -7915,6 +7915,10 @@ add_expr (const_tree t, inchash::hash &h
&& integer_zerop (TREE_OPERAND (t, 1)))
inchash::add_expr (TREE_OPERAND (TREE_OPERAND (t, 0), 0),
hstate, flags);
+ /* Don't ICE on language specific trees. */
+ else if ((int) code >= NUM_TREE_CODES
+ && (tclass == tcc_constant || tclass == tcc_exceptional))
+ return;
else
{
gcc_assert (IS_EXPR_CODE_CLASS (tclass));
should fix this.
>From gcc-bugs-return-524094-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 21:16:14 2016
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Subject: [Bug c++/66639] declare __func__ , __FUNCTION__ & __PRETTY_FUNCTION__ as constexpr
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--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue May 3 21:15:28 2016
New Revision: 235845
URL: https://gcc.gnu.org/viewcvs?rev=235845&root=gcc&view=rev
Log:
PR c++/66561 - __builtin_LINE at al. should yield constant expressions
PR c++/66639 - declare __func__, __FUNCTION__ & __PRETTY_FUNCTION__ constexpr
gcc/testsuite/ChangeLog:
2016-05-03 Martin Sebor <msebor@redhat.com>
PR c++/66561
* c-c++-common/builtin_location.c: New test.
* g++.dg/cpp1y/builtin_location.C: New test.
gcc/cp/ChangeLog:
2016-05-03 Martin Sebor <msebor@redhat.com>
PR c++/66561
* tree.c (builtin_valid_in_constant_expr_p): Treat BUILT_IN_FILE,
BUILT_IN_FUNCTION, and BUILT_IN_LINE as constant expressions.
gcc/ChangeLog:
2016-05-03 Martin Sebor <msebor@redhat.com>
PR c++/66561
* builtins.c (fold_builtin_FILE): New function.
(fold_builtin_FUNCTION, fold_builtin_LINE): New functions.
(fold_builtin_0): Call them.
* gimplify.c (gimplify_call_expr): Remove the handling of
BUILT_IN_FILE, BUILT_IN_FUNCTION, and BUILT_IN_LINE.
PR c++/66561
* doc/extend.texi (Other Builtins): Update __builtin_FILE,
__builtin_FUNCTION, and __builtin_LINE to reflect they yield
constants.
PR c++/66639
* doc/extend.texi (Function Names as Strings): Update __func__,
__FUNCTION__, __PRETTY_FUNCTION__ to reflect they evaluate to
constants.
Added:
trunk/gcc/testsuite/c-c++-common/builtin_location.c
trunk/gcc/testsuite/g++.dg/cpp1y/builtin_location.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/tree.c
trunk/gcc/doc/extend.texi
trunk/gcc/gimplify.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/66561] __builtin_LINE at al. should yield constant expressions
Date: Tue, 03 May 2016 21:16:00 -0000
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--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Tue May 3 21:15:28 2016
New Revision: 235845
URL: https://gcc.gnu.org/viewcvs?rev=235845&root=gcc&view=rev
Log:
PR c++/66561 - __builtin_LINE at al. should yield constant expressions
PR c++/66639 - declare __func__, __FUNCTION__ & __PRETTY_FUNCTION__ constexpr
gcc/testsuite/ChangeLog:
2016-05-03 Martin Sebor <msebor@redhat.com>
PR c++/66561
* c-c++-common/builtin_location.c: New test.
* g++.dg/cpp1y/builtin_location.C: New test.
gcc/cp/ChangeLog:
2016-05-03 Martin Sebor <msebor@redhat.com>
PR c++/66561
* tree.c (builtin_valid_in_constant_expr_p): Treat BUILT_IN_FILE,
BUILT_IN_FUNCTION, and BUILT_IN_LINE as constant expressions.
gcc/ChangeLog:
2016-05-03 Martin Sebor <msebor@redhat.com>
PR c++/66561
* builtins.c (fold_builtin_FILE): New function.
(fold_builtin_FUNCTION, fold_builtin_LINE): New functions.
(fold_builtin_0): Call them.
* gimplify.c (gimplify_call_expr): Remove the handling of
BUILT_IN_FILE, BUILT_IN_FUNCTION, and BUILT_IN_LINE.
PR c++/66561
* doc/extend.texi (Other Builtins): Update __builtin_FILE,
__builtin_FUNCTION, and __builtin_LINE to reflect they yield
constants.
PR c++/66639
* doc/extend.texi (Function Names as Strings): Update __func__,
__FUNCTION__, __PRETTY_FUNCTION__ to reflect they evaluate to
constants.
Added:
trunk/gcc/testsuite/c-c++-common/builtin_location.c
trunk/gcc/testsuite/g++.dg/cpp1y/builtin_location.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/builtins.c
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>From gcc-bugs-return-524096-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 21:17:22 2016
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Subject: [Bug c++/66561] __builtin_LINE at al. should yield constant expressions
Date: Tue, 03 May 2016 21:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66561
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
Fixed in 235845 for GCC 7.0.
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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++/70827] [6/7 regression] dubious use of deleted function in inherited constructor
Date: Tue, 03 May 2016 21:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70827
--- Comment #2 from Jens Maurer <jens.maurer at gmx dot net> ---
A prominent use case is that std::unique_ptr in the parameter list of an
inherited constructor stops working.
>From gcc-bugs-return-524098-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 21:43:25 2016
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From: "jens.maurer at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70932] New: flexible array member with non-trivial destructor
Date: Tue, 03 May 2016 21:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70932
Bug ID: 70932
Summary: flexible array member with non-trivial destructor
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
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Testcase:
struct A {
~A();
};
struct S {
S() : i(0) { }
int i;
A a[];
};
$ g++ -v flex.cc
gcc version 6.1.0 (GCC)
flex.cc: In constructor ‘S::S()’:
flex.cc:6:12: error: unknown array size in delete
This used to work with gcc 5.x. (I understand the destructor of A is not
called for a[] here, because the number of elements is unknown.)
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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++/70635] [4.9/5 Regression] ICE on (and rejects) valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Tue, 03 May 2016 21:44:00 -0000
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--- Comment #6 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue May 3 21:44:04 2016
New Revision: 235846
URL: https://gcc.gnu.org/viewcvs?rev=235846&root=gcc&view=rev
Log:
/cp
2016-05-03 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/70635
* pt.c (resolve_typename_type): Fix typos in infinite recursion
avoidance mechanism.
/testsuite
2016-05-03 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/70635
* g++.dg/parse/pr70635.C: New.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/parse/pr70635.C
Modified:
branches/gcc-5-branch/gcc/cp/ChangeLog
branches/gcc-5-branch/gcc/cp/pt.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-524100-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 21:47:38 2016
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From: "paolo.carlini at oracle dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70635] [4.9 Regression] ICE on (and rejects) valid code on x86_64-linux-gnu: Segmentation fault (program cc1plus)
Date: Tue, 03 May 2016 21:47:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
CC|paolo at gcc dot gnu.org |
Resolution|--- |FIXED
Target Milestone|4.9.4 |5.4
Summary|[4.9/5 Regression] ICE on |[4.9 Regression] ICE on
|(and rejects) valid code on |(and rejects) valid code on
|x86_64-linux-gnu: |x86_64-linux-gnu:
|Segmentation fault (program |Segmentation fault (program
|cc1plus) |cc1plus)
--- Comment #7 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed for 5.4 too. I'm closing the bug, I don't think we want to fiddle with
gcc-4_9-branch for this kind of issue, at this point.
>From gcc-bugs-return-524101-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 03 22:02:39 2016
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From: "j.v.dijk at tue dot nl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70933] New: [7.0 regression] ICE with -Wall on valid code in inchash::add_expr
Date: Tue, 03 May 2016 22:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70933
Bug ID: 70933
Summary: [7.0 regression] ICE with -Wall on valid code in
inchash::add_expr
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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The reduced testcase at the end of this report makes rev. 235846 of the
compiler ice with -Wall. Maybe related to PR70906.
> g++ -c -Wall declarations.cpp
declarations.cpp: In instantiation of ‘void test_declarations() [with T =
unsigned int]’:
declarations.cpp:22:30: required from here
declarations.cpp:17:5: internal compiler error: in add_expr, at tree.c:7928
T& param = evaluator.declare_parameter("p1")=T(4);
^~~~~
0x1020896 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
../../gcc-head/gcc/tree.c:7928
0x10202f2 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
../../gcc-head/gcc/tree.c:7997
0x101ff75 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
../../gcc-head/gcc/tree.c:7997
0x101ff75 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
../../gcc-head/gcc/tree.c:7997
0x10202f2 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
../../gcc-head/gcc/tree.c:7997
0x101ff75 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
../../gcc-head/gcc/tree.c:7997
0x10202f2 inchash::add_expr(tree_node const*, inchash::hash&, unsigned int)
../../gcc-head/gcc/tree.c:7997
0xa9bf68 operand_equal_p(tree_node const*, tree_node const*, unsigned int)
../../gcc-head/gcc/fold-const.c:2761
0x8ae46a candidate_equal_p
../../gcc-head/gcc/c-family/c-common.c:2926
0x8ae4fb candidate_equal_p
../../gcc-head/gcc/c-family/c-common.c:2926
0x8ae4fb merge_tlist
../../gcc-head/gcc/c-family/c-common.c:2831
0x8b2725 verify_tree
../../gcc-head/gcc/c-family/c-common.c:3135
0x8b66aa verify_sequence_points(tree_node*)
../../gcc-head/gcc/c-family/c-common.c:3159
0x7fa287 finish_expr_stmt(tree_node*)
../../gcc-head/gcc/cp/semantics.c:682
0x699f0d initialize_local_var
../../gcc-head/gcc/cp/decl.c:6428
0x699f0d cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
../../gcc-head/gcc/cp/decl.c:6977
0x6cc84f tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-head/gcc/cp/pt.c:15216
0x6c8f24 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-head/gcc/cp/pt.c:15105
0x6c9d27 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../../gcc-head/gcc/cp/pt.c:15290
0x6c697d instantiate_decl(tree_node*, int, bool)
../../gcc-head/gcc/cp/pt.c:22019
jan@linux-pwd6:~/src/gum-cvs/plmathparser/testsuite> cat declarations.cpp
struct string
{
string(const char*);
};
template <class T>
struct expression_evaluator
{
typedef T result_type;
result_type& declare_parameter(const string& name);
};
template <class T>
void test_declarations()
{
expression_evaluator<T> evaluator;
T& param = evaluator.declare_parameter("p1")=T(4);
}
void foo()
{
test_declarations<unsigned>();
}
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From: "bernds at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/57193] [4.9/5/6/7 Regression] suboptimal register allocation for SSE registers
Date: Tue, 03 May 2016 22:49:00 -0000
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--- Comment #12 from Bernd Schmidt <bernds at gcc dot gnu.org> ---
Author: bernds
Date: Tue May 3 22:48:03 2016
New Revision: 235848
URL: https://gcc.gnu.org/viewcvs?rev=235848&root=gcc&view=rev
Log:
PR rtl-optimization/57193
* opts.c (default_options_table): Revert OPT_frename_registers change.
* doc/invoke.texi (-frename-registers, -O2): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/invoke.texi
trunk/gcc/opts.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70866] powerpc64le -ffixed-cr2 -ffixed-cr3 -ffixed-cr4 ICE
Date: Tue, 03 May 2016 23:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70866
--- Comment #1 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Tue May 3 23:51:34 2016
New Revision: 235851
URL: https://gcc.gnu.org/viewcvs?rev=235851&root=gcc&view=rev
Log:
[RS6000] powerpc64le -ffixed-cr2 -ffixed-cr3 -ffixed-cr4 ICE
gcc/
PR target/70866
* config/rs6000/rs6000.c (rs6000_stack_info): Don't set cr_save_p
when cr2,3,4 are all fixed regs.
gcc/testsuite/
* gcc.target/powerpc/pr70866.c: New.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr70866.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/70866] powerpc64le -ffixed-cr2 -ffixed-cr3 -ffixed-cr4 ICE
Date: Wed, 04 May 2016 00:04:00 -0000
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #2 from Alan Modra <amodra at gmail dot com> ---
Fixed.
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Subject: [Bug target/70934] New: 16-byte atomics are unimplemented on s390x, but __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 is defined
Date: Wed, 04 May 2016 00:28:00 -0000
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Bug ID: 70934
Summary: 16-byte atomics are unimplemented on s390x, but
__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 is defined
Product: gcc
Version: 5.3.0
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$ cat at128.c
typedef int ti __attribute__((mode(TI)));
ti a, b, c;
int main(void) {
#ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16
__sync_val_compare_and_swap(&a, b, c);
#endif
}
$ gcc at128.c
/tmp/cc1ezNAw.o: In function `main':
at128.c:(.text+0x66): undefined reference to `__sync_val_compare_and_swap_16'
collect2: error: ld returned 1 exit status
>From gcc-bugs-return-524106-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 00:42:30 2016
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From: "bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70928] Load simple float constants via VSX operations on PowerPC
Date: Wed, 04 May 2016 00:42:00 -0000
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--- Comment #2 from Peter Bergner <bergner at gcc dot gnu.org> ---
Can powers of 2 values be generated with a splat followed by a shift?
>From gcc-bugs-return-524107-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 01:18:39 2016
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From: "ljliang1990 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70918] Internal compiler error: Illegal instruction
Date: Wed, 04 May 2016 01:18:00 -0000
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--- Comment #2 from Liang <ljliang1990 at gmail dot com> ---
Alright Thanks, i'll try to redo the whole LFS.
>From gcc-bugs-return-524108-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 04:00:47 2016
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From: "gccbugs at jbapple dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70898] Stateful Compare objects are very slow
Date: Wed, 04 May 2016 04:00:00 -0000
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gccbugs at jbapple dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|DUPLICATE |---
--- Comment #6 from gccbugs at jbapple dot com ---
I'm not sure I agree that this is a duplicate. In particular, 67085 says that
std::priority_queue operations "should not copy comparators". I suggested that
as well in my initial report, but upon a closer reading of the standard, I'm
not sure that would be conformant, since the standard requires
priorityy_queue::push to call std::push_heap, and std::push_heap has to take
its comparator by value.
On the other hand, I do think that copying comparators *fewer* times that
libstdc++ currently does is permitted, and I think it could have a big
performance benefit in some cases.
In particular, though push_heap seems like it must take the comparator by
value, __push_heap is not required to do so. The constructor for
__gnu_cxx::__ops::_Iter_comp_val and the function
__gnu_cxx::__ops::__iter_comp_val also do not have to take their comparators by
value.
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Subject: [Bug debug/70935] New: [6/7 Regression] ICE: verify_ssa failed (error: definition in block 9 does not dominate use in block 12) w/ -O3 -g
Date: Wed, 04 May 2016 04:01:00 -0000
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Bug ID: 70935
Summary: [6/7 Regression] ICE: verify_ssa failed (error:
definition in block 9 does not dominate use in block
12) w/ -O3 -g
Product: gcc
Version: 6.0
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gcc 6 and 7 ICE when compiling the following reduced snippet at -O3 (or -Ofast)
w/ -g:
int d0, sj, v0, rp, zi;
void
zn(void)
{
if (v0 != 0)
{
int *js, *r3;
int pm, gc;
for (gc = 0; gc < 1; ++gc)
{
sj = 1;
while (sj != 0)
;
}
r3 = ±
*js = &gc;
ka:
for (d0 = 0; d0 < 2; ++d0)
{
d0 = zi;
if (zi)
for (pm = 2; pm != 0; --pm)
;
}
while (*r3 != 0)
{
while (pm)
;
++r3;
}
}
rp = 0;
goto ka;
}
% gcc-7.0.0-alpha20160501 -c -O3 -g fngq6pkt.c
fngq6pkt.c: In function 'zn':
fngq6pkt.c:18:11: warning: assignment makes integer from pointer without a cast
[-Wint-conversion]
*js = &gc;
^
fngq6pkt.c:4:1: error: definition in block 9 does not dominate use in block 12
zn(void)
^~
for SSA_NAME: pm.7_34 in statement:
# DEBUG pm => pm.7_34
fngq6pkt.c:4:1: internal compiler error: verify_ssa failed
>From gcc-bugs-return-524110-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 05:41:26 2016
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From: "gentryx at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70925] Vectorized loop segfaults: read exceeds vector boundary
Date: Wed, 04 May 2016 05:41:00 -0000
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--- Comment #5 from Andreas Schaefer <gentryx at gmx dot de> ---
@Markus Trippelsdorf interesting, let me check the code once again. Which tool
did you use for this analysis?
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From: "lh_mouse at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug preprocessor/70936] New: Hard-coded C++ header paths and relocation problem on Windows
Date: Wed, 04 May 2016 05:43:00 -0000
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Bug ID: 70936
Summary: Hard-coded C++ header paths and relocation problem on
Windows
Product: gcc
Version: 6.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: lh_mouse at 126 dot com
Target Milestone: ---
The following message is copied from
https://gcc.gnu.org/ml/gcc/2016-05/msg00003.html
```
This is a cross-post from gcc-help as there haven't been any replies on
gcc-help since two days ago. Hope someone could help.
```
I have built GCC from gcc-6-branch in MSYS2 with mingw-w64 CRT on Windows
today.
Now I have a relocation problem:
Assuming mingw-w64 headers are located in the follow directory,which is, the
native_system_header_dir:
> C:/MinGW/MSYS2/mingw32/lib/gcc/i686-w64-mingw32/6.1.1/include
I have built GCC and it has that hard-coded path.
When I compile something using g++ -v, the headers are searched in the
following paths:
```
ignoring nonexistent directory "/mingw32/include"
ignoring duplicate directory "C:/MinGW/MSYS2/mingw32/i686-w64-mingw32/include"
#include "..." search starts here:
#include <...> search starts here:
C:/MinGW/MSYS2/mingw32/include/c++/6.1.1
C:/MinGW/MSYS2/mingw32/include/c++/6.1.1/i686-w64-mingw32
C:/MinGW/MSYS2/mingw32/include/c++/6.1.1/backward
C:/MinGW/MSYS2/mingw32/lib/gcc/i686-w64-mingw32/6.1.1/include
C:/MinGW/MSYS2/mingw32/lib/gcc/i686-w64-mingw32/6.1.1/../../../../include
C:/MinGW/MSYS2/mingw32/lib/gcc/i686-w64-mingw32/6.1.1/include-fixed
C:/MinGW/MSYS2/mingw32/lib/gcc/i686-w64-mingw32/6.1.1/../../../../i686-w64-mingw32/include
End of search list.
```
The C++ headers are searched before any mingw-w64 headers, which is just fine.
However, if I move gcc to another directory, let's say,
C:/this_is_a_new_directory/mingw32/,
then re-compile the same program with g++ -v, the headers are searched in the
following paths:
```
ignoring duplicate directory
"C:/this_is_a_new_directory/mingw32/lib/gcc/../../lib/gcc/i686-w64-mingw32/6.1.1/include"
ignoring nonexistent directory "C:/MinGW/MSYS2/mingw32/include"
ignoring nonexistent directory "/mingw32/include"
ignoring duplicate directory
"C:/this_is_a_new_directory/mingw32/lib/gcc/../../lib/gcc/i686-w64-mingw32/6.1.1/include-fixed"
ignoring duplicate directory
"C:/this_is_a_new_directory/mingw32/lib/gcc/../../lib/gcc/i686-w64-mingw32/6.1.1/../../../../i686-w64-mingw32/include"
ignoring nonexistent directory
"C:/MinGW/MSYS2/mingw32/i686-w64-mingw32/include"
#include "..." search starts here:
#include <...> search starts here:
C:/this_is_a_new_directory/mingw32/bin/../lib/gcc/i686-w64-mingw32/6.1.1/include
C:/this_is_a_new_directory/mingw32/bin/../lib/gcc/i686-w64-mingw32/6.1.1/../../../../include
C:/this_is_a_new_directory/mingw32/bin/../lib/gcc/i686-w64-mingw32/6.1.1/include-fixed
C:/this_is_a_new_directory/mingw32/bin/../lib/gcc/i686-w64-mingw32/6.1.1/../../../../i686-w64-mingw32/include
C:/this_is_a_new_directory/mingw32/lib/gcc/../../include/c++/6.1.1
C:/this_is_a_new_directory/mingw32/lib/gcc/../../include/c++/6.1.1/i686-w64-mingw32
C:/this_is_a_new_directory/mingw32/lib/gcc/../../include/c++/6.1.1/backward
End of search list.
```
This time the C++ headers are searched after mingw-w64 headers, which causes
the following error:
```
In file included from
C:/MinGW/mingw32/include/c++/6.1.1/ext/string_conversions.h:41:0,
from
C:/MinGW/mingw32/include/c++/6.1.1/bits/basic_string.h:5402,
from C:/MinGW/mingw32/include/c++/6.1.1/string:52,
from
C:/MinGW/mingw32/include/c++/6.1.1/bits/locale_classes.h:40,
from C:/MinGW/mingw32/include/c++/6.1.1/bits/ios_base.h:41,
from C:/MinGW/mingw32/include/c++/6.1.1/ios:42,
from C:/MinGW/mingw32/include/c++/6.1.1/ostream:38,
from C:/MinGW/mingw32/include/c++/6.1.1/iostream:39,
from test.cpp:1:
C:/MinGW/mingw32/include/c++/6.1.1/cstdlib:75:25: fatal error: stdlib.h: No
such file or directory
#include_next <stdlib.h>
^
compilation terminated.
```
Do you know how to solve this problem (modifications to gcc source code are
expected)?
Thanks in advance.
--------------
Best regards,
lh_mouse
2016-05-02
I made some investigation yesterday and here is the result:
```
Diff'ing gcc/libstdc++-v3/include/c_global/cstdlib from gcc-5-branch and
gcc-6-branch gives the following result:
(git diff gcc-5-branch gcc-6-branch -- libstdc++-v3/include/c_global/cstdlib)
```
@@ -69,7 +69,11 @@ namespace std
#else
-#include <stdlib.h>
+// Need to ensure this finds the C library's <stdlib.h> not a libstdc++
+// wrapper that might already be installed later in the include search path.
+#define _GLIBCXX_INCLUDE_NEXT_C_HEADERS
+#include_next <stdlib.h>
+#undef _GLIBCXX_INCLUDE_NEXT_C_HEADERS
// Get rid of those macros defined in <stdlib.h> in lieu of real functions.
#undef abort
```
Replacing #include_next with #include fixes the problem.
However, I am not exactly clear about whether it is these headers (cstdlib and
cmath currently, there might be more) that are the problem.
In my point of view, it is the inversion of C and C++ header paths that is the
problem.
------------------
Best regards,
lh_mouse
2016-05-02
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/70936] Hard-coded C++ header paths and relocation problem on Windows
Date: Wed, 04 May 2016 05:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70936
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|preprocessor |driver
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I use relocatable directory feature on Linux but I have not tested 6 yet.
This is a driver issue I think ...
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From: "lh_mouse at 126 dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/70936] Hard-coded C++ header paths and relocation problem on Windows
Date: Wed, 04 May 2016 05:56:00 -0000
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--- Comment #2 from lh_mouse <lh_mouse at 126 dot com> ---
(In reply to Andrew Pinski from comment #1)
> I use relocatable directory feature on Linux but I have not tested 6 yet.
> This is a driver issue I think ...
I was examining gcc/gcc/incpath.c for problems, though failed to find any, I
think it is worthing mentioning that '-iprefix this_directory_need_not_exist/'
effectively vanished the problem - that is, the order of C and C++ include
paths became correct again.
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Subject: =?UTF-8?B?W0J1ZyBtaWRkbGUtZW5kLzcwOTM3XSBOZXc6IFs3LjAgUmVncmVzc2lvbl0g?= =?UTF-8?B?SUNFOiB0cmVlIGNvZGUg4oCYc3NhX25hbWXigJkgaXMgbm90IHN1cHBvcnRl?= =?UTF-8?B?ZCBpbiBMVE8gc3RyZWFtcw==?Date: Wed, 04 May 2016 05:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70937
Bug ID: 70937
Summary: [7.0 Regression] ICE: tree code ‘ssa_name’ is not
supported in LTO streams
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: Joost.VandeVondele at mat dot ethz.ch
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overnight regression in trunk:
> cat bug.f90
SUBROUTINE dbcsr_test_read_args(narg, args)
CHARACTER(len=*), DIMENSION(:), &
INTENT(out) :: args
CHARACTER(len=80) :: line
DO
args(narg) = line
ENDDO
END SUBROUTINE dbcsr_test_read_args
> gfortran -flto -c -O0 bug.f90
bug.f90:8:0: internal compiler error: tree code ‘ssa_name’ is not supported in
LTO streams
END SUBROUTINE dbcsr_test_read_args
0xa62703 DFS::DFS(output_block*, tree_node*, bool, bool, bool)
../../gcc/gcc/lto-streamer-out.c:676
0xa6338b lto_output_tree(output_block*, tree_node*, bool, bool)
../../gcc/gcc/lto-streamer-out.c:1616
0xa5960d write_global_stream
../../gcc/gcc/lto-streamer-out.c:2415
0xa5960d lto_output_decl_state_streams(output_block*, lto_out_decl_state*)
../../gcc/gcc/lto-streamer-out.c:2462
0xa60fa4 produce_asm_for_decls()
../../gcc/gcc/lto-streamer-out.c:2839
0xacd65f write_lto
../../gcc/gcc/passes.c:2459
0xad08ae ipa_write_summaries_1
../../gcc/gcc/passes.c:2520
0xad08ae ipa_write_summaries()
../../gcc/gcc/passes.c:2580
0x7a6059 ipa_passes
../../gcc/gcc/cgraphunit.c:2310
0x7a6059 symbol_table::compile()
../../gcc/gcc/cgraphunit.c:2404
0x7a880d symbol_table::finalize_compilation_unit()
../../gcc/gcc/cgraphunit.c:2564
Please submit a full bug report,
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Subject: [Bug c++/70938] New: internal compiler error: in tsubst_copy, at cp/pt.c:13008
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Bug ID: 70938
Summary: internal compiler error: in tsubst_copy, at
cp/pt.c:13008
Product: gcc
Version: 5.3.1
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$ cat ice-20160504.cpp
struct bar_t
{
int i;
};
template <typename T>
struct foo_t
{
bar_t & bar = *(bar_t *)0x7770;
int & i = bar.i;
};
constexpr auto foo = foo_t<int>{};
$ arm-none-eabi-g++.exe -std=c++14 ice-20160504.cpp
ice-20160504.cpp:13:33: internal compiler error: in tsubst_copy, at
cp/pt.c:13008
constexpr auto foo = foo_t<int>{};
^
...
$ arm-none-eabi-g++.exe -V
...
gcc version 5.3.1 20160307 (release) [ARM/embedded-5-branch revision 234589]
(GNU Tools for ARM Embedded Processors)
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-04
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |6.2
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r228599.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70937
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-04
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed: e.g.,
gfortran.dg/actual_array_constructor_1.f90
gfortran.dg/actual_array_constructor_2.f90
...
gfortran.dg/widechar_intrinsics_5.f90
libgomp.fortran/vla*.f90
>From gcc-bugs-return-524118-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 06:39:26 2016
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From: "pravasimeet999 at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70939] New: creating object of abstract class allowed in all versions of g++
Date: Wed, 04 May 2016 06:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70939
Bug ID: 70939
Summary: creating object of abstract class allowed in all
versions of g++
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: pravasimeet999 at yahoo dot com
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Created attachment 38408
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38408&action=edit
g++ compiles ill formed C++ program successfully
The following program is ill formed C++ program because it is not allowed to
create objects of abstract class. But in all versions of g++ the program
compiles successfully.
This question originally asked on stackoverflow by user Matt. See here:
http://stackoverflow.com/questions/37017094/why-do-gcc-and-clang-allow-me-to-construct-an-abstract-class
.
(See live demo here: http://melpon.org/wandbox/permlink/U7PeIkEPT19BfguJ )
#include <stdio.h>
class A
{
public:
A() {
printf("A()\n");
}
virtual void b() const = 0;
};
int main()
{
const A& a{};
a.b();
return 0;
}
The program is clearly invalid & implementation is required to produce a
diagnosis for this according to C++ standard.
>From gcc-bugs-return-524119-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 06:44:06 2016
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Subject: [Bug c++/70925] Vectorized loop segfaults: read exceeds vector boundary
Date: Wed, 04 May 2016 06:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70925
--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Quote from http://gcc.gnu.org/bugs/:
»Before reporting that GCC compiles your code incorrectly, compile it with gcc
-Wall -Wextra and see whether this shows anything wrong with your code.
Similarly, if compiling with -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations makes a difference, or if compiling with
-fsanitize=undefined produces any run-time errors, then your code is probably
not correct.«
-fsanitize=undefined will point out these issues.
>From gcc-bugs-return-524120-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 06:51:28 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70939] creating object of abstract class allowed in all versions of g++
Date: Wed, 04 May 2016 06:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70939
--- Comment #1 from Pravasi Meet <pravasimeet999 at yahoo dot com> ---
MSVC++ 2015 doesn't compile the program & gives compilation errors as expected
when compiling the program. You can test the program at here:
http://webcompiler.cloudapp.net/
>From gcc-bugs-return-524121-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 07:06:08 2016
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Subject: [Bug target/70934] 16-byte atomics are unimplemented on s390x, but __GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 is defined
Date: Wed, 04 May 2016 07:06:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
They are implemented, you just have to make sure the variable you perform
atomic on is also sufficiently aligned.
a has only 8-byte alignment by default in the s390* ABI, which is not enough.
You need ti a __attribute__((aligned (16))); or something similar.
>From gcc-bugs-return-524122-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 07:27:21 2016
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Subject: [Bug libstdc++/70940] New: pmr::resource_adaptor requires optional allocator requirements and incorrectly aligns returned pointers.
Date: Wed, 04 May 2016 07:27:00 -0000
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Bug ID: 70940
Summary: pmr::resource_adaptor requires optional allocator
requirements and incorrectly aligns returned pointers.
Product: gcc
Version: 6.0
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resource_adapter incorrectly requires that the Allocator provide:
* A pointer typedef.
* A default constructor.
Furthermore it seems that do_allocate returns ill-aligned pointers. It seems
that do_allocate(s, a) returns the pointers from
'Allocator<char>.allocate(...)' directly even though they have no alignment
guarantees.
>From gcc-bugs-return-524123-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 07:36:50 2016
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Subject: [Bug debug/70935] [6/7 Regression] ICE: verify_ssa failed (error: definition in block 9 does not dominate use in block 12) w/ -O3 -g
Date: Wed, 04 May 2016 07:36:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is tree_unswitch_outer_loop -> hoist_guard not resetting debug stmts that
have some uses of SSA_NAMEs defined in the inner loop.
But the transformation is really weird.
We have:
loop7==================
bb10
|
v
loop2 =============
/>bb8
| inv test
| / |
| | something
| \ | \
| v v \
| bb7 +
| | |
+---+ |
loop2 end =========
|
v
bb13
DEBUG pm = defined_in_something
And we move the inv test to bb 10, with one edge going to loop2, and the other
to bb13 (newly added edge). If I understand the cfg right though, we've thus
changed an endless loop (if inv test is false, bb8 not really having any
side-effects just jumped to bb7 and back to bb8 forever) into no loop, and in
addition the newly added edge from bb10 to bb13 of course means any SSA_NAMEs
defined in loop2 can't be used.
>From gcc-bugs-return-524124-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 07:45:45 2016
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From: "gentryx at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70925] Vectorized loop segfaults: read exceeds vector boundary
Date: Wed, 04 May 2016 07:45:00 -0000
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Andreas Schaefer <gentryx at gmx dot de> changed:
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----------------------------------------------------------------------------
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Resolution|--- |INVALID
--- Comment #7 from Andreas Schaefer <gentryx at gmx dot de> ---
Thanks, I missed the final clause. Also I've now found the cause for this bug
in my code. Sorry for the noise.
>From gcc-bugs-return-524125-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 07:46:56 2016
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Subject: [Bug c++/70933] [7.0 regression] ICE with -Wall on valid code in inchash::add_expr
Date: Wed, 04 May 2016 07:46:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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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 70906 ***
>From gcc-bugs-return-524126-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 07:46:57 2016
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Subject: [Bug c++/70906] [7 Regression] ice in add_expr, at tree.c:7925
Date: Wed, 04 May 2016 07:47:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |j.v.dijk at tue dot nl
--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
*** Bug 70933 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-524127-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 07:47:18 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70916] [6 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "tree_operand_check"
Date: Wed, 04 May 2016 07:47:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7 Regression] gcc ICE at |[6 Regression] gcc ICE at
|-O3 on valid code on |-O3 on valid code on
|x86_64-linux-gnu in |x86_64-linux-gnu in
|"tree_operand_check" |"tree_operand_check"
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Should be fixed on the trunk so far.
>From gcc-bugs-return-524128-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 07:51:22 2016
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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/70396] ICE on valid code at -O3 in 32-bit and 64-bit modes on x86_64-linux-gnu (in immed_wide_int_const, at emit-rtl.c:606)
Date: Wed, 04 May 2016 07:51:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #5)
> Hi.
>
> With the updated version of the compiler, I still get the ICE for:
>
> $ cat tc.ii
>
> void fn1() {
> unsigned *a = 0;
> for (int i; i; ++i) {
> unsigned g(a[i] << 8 >> 24);
> a[i] = g;
> }
> }
>
> $ /home/marxin/bin/gcc2/lib/gcc/x86_64-pc-linux-gnu/7.0.0/cc1plus
> -fpreprocessed tc.ii -march=haswell -mmmx -mno-3dnow -msse -msse2 -msse3
> -mssse3 -mno-sse4a -mcx16 -msahf -mmovbe -maes -mno-sha -mpclmul -mpopcnt
> -mabm -mno-lwp -mfma -mno-fma4 -mno-xop -mbmi -mbmi2 -mno-tbm -mavx -mavx2
> -msse4.2 -msse4.1 -mlzcnt -mno-rtm -mno-hle -mrdrnd -mf16c -mfsgsbase
> -mno-rdseed -mno-prfchw -mno-adx -mfxsr -mxsave -mxsaveopt -mno-avx512f
> -mno-avx512er -mno-avx512cd -mno-avx512pf -mno-prefetchwt1 -mno-clflushopt
> -mno-xsavec -mno-xsaves -mno-avx512dq -mno-avx512bw -mno-avx512vl
> -mno-avx512ifma -mno-avx512vbmi -mno-clwb -mno-pcommit -mno-mwaitx
> -mno-clzero -mno-pku --param l1-cache-size=32 --param l1-cache-line-size=64
> --param l2-cache-size=8192 -mtune=haswell -quiet -dumpbase tc.ii -O3
>
> tc.ii:7:1: internal compiler error: in immed_wide_int_const, at
> emit-rtl.c:606
> }
> ^
> 0xa4cf35 immed_wide_int_const(generic_wide_int<wide_int_ref_storage<false> >
> const&, machine_mode)
> ../../gcc/emit-rtl.c:606
> 0x13929a9 change_zero_ext
> ../../gcc/combine.c:11111
> 0x13937d8 recog_for_combine
> ../../gcc/combine.c:11148
> 0x13a175d try_combine
> ../../gcc/combine.c:3503
> 0x13a6fc1 combine_instructions
> ../../gcc/combine.c:1288
> 0x13a6fc1 rest_of_handle_combine
> ../../gcc/combine.c:14348
> 0x13a6fc1 execute
> ../../gcc/combine.c:14391
>
> Thanks
Looks like a different issue - please file a new bug.
#2 0x00000000019c0fb7 in change_zero_ext (src=0x7ffff6688958)
at /space/rguenther/src/svn/trunk/gcc/combine.c:11111
11111 x = gen_rtx_AND (mode, x, immed_wide_int_const (mask, mode));
(gdb) l
11106 }
11107 else
11108 continue;
11109
11110 wide_int mask = wi::mask (size, false, GET_MODE_PRECISION
(mode));
11111 x = gen_rtx_AND (mode, x, immed_wide_int_const (mask, mode));
11112
11113 SUBST (**iter, x);
11114 changed = true;
11115 }
(gdb) p debug_rtx (src)
Cannot resolve function debug_rtx to any overloaded instance
(gdb) p src
$1 = (rtx *) 0x7ffff6688958
(gdb) p debug_rtx (*src)
(zero_extract:V8SI (mem:V8SI (reg:DI 240 [ ivtmp.29 ]) [1 MEM[base: 0B, index:
ivtmp.29_232, offset: 0B]+0 S32 A256])
(const_int 232 [0xe8])
(const_int 16 [0x10]))
$2 = void
looks like either an invalid zero_extract or change_zero_ext not properly
dealing with vector modes. It's already on insn 154:
(insn 154 153 156 17 (set (reg:V8SI 289 [ vect_g_10.15 ])
(zero_extract:V8SI (mem:V8SI (reg:DI 240 [ ivtmp.29 ]) [1 MEM[base: 0B,
index: ivtmp.29_232, offset: 0B]+0 S32 A256])
(const_int 232 [0xe8])
(const_int 16 [0x10]))) t.ii:4 3098 {lshrv8si3}
(expr_list:REG_DEAD (reg:V8SI 287 [ vect__5.14 ])
(nil)))
but only generated by combine as an intermediate insn it seems.
Trying 152 -> 153:
Failed to match this instruction:
(set (reg:V8SI 287 [ vect__5.14 ])
(ashift:V8SI (mem:V8SI (reg:DI 240 [ ivtmp.29 ]) [1 MEM[base: 0B, index:
ivtmp.29_232, offset: 0B]+0 S32 A256])
(const_int 8 [0x8])))
Trying 153 -> 154:
Failed to match this instruction:
(set (reg:V8SI 289 [ vect_g_10.15 ])
(lshiftrt:V8SI (ashift:V8SI (reg:V8SI 288 [ MEM[base: 0B, index:
ivtmp.29_232, offset: 0B] ])
(const_int 8 [0x8]))
(const_int 24 [0x18])))
Trying 152, 153 -> 154:
Failed to match this instruction:
(set (reg:V8SI 289 [ vect_g_10.15 ])
(zero_extract:V8SI (mem:V8SI (reg:DI 240 [ ivtmp.29 ]) [1 MEM[base: 0B,
index: ivtmp.29_232, offset: 0B]+0 S32 A256])
(const_int 232 [0xe8])
(const_int 16 [0x10])))
>From gcc-bugs-return-524129-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 08:17:49 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70396] ICE on valid code at -O3 in 32-bit and 64-bit modes on x86_64-linux-gnu (in immed_wide_int_const, at emit-rtl.c:606)
Date: Wed, 04 May 2016 08:17:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
Resolution|FIXED |---
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'd say we really don't want vector mode ZERO_EXTRACTs/SIGN_EXTRACTs, so
perhaps
make_extraction could give up in that case, maybe:
/* Never narrow an object, since that might not be safe. */
if (mode != VOIDmode
&& GET_MODE_SIZE (extraction_mode) < GET_MODE_SIZE (mode))
extraction_mode = mode;
and inside of if just do
{
/* Avoid vector mode extractions. */
if (VECTOR_MODE_P (mode))
return NULL_RTX;
extraction_mode = mode;
}
Or should we punt even earlier?
>From gcc-bugs-return-524130-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 08:26:03 2016
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From: "vsevolod.livinskij at frtk dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70941] New: [5/6/7 Regression] Test miscompiled with -O2.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70941
Bug ID: 70941
Summary: [5/6/7 Regression] Test miscompiled with -O2.
Product: gcc
Version: 7.0
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Severity: normal
Priority: P3
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Reporter: vsevolod.livinskij at frtk dot ru
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Created attachment 38409
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38409&action=edit
Reproducer.
Test case produces incorrect result with -O2 option.
Output:
> g++ -O0 repr.cpp; ./a.out
-109
> g++ -O3 repr.cpp; ./a.out
-110
GCC version:
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/export/users/vlivinsk/gcc-trunk/bin/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /export/users/gnutester/stability/svn/trunk/configure
--prefix=/export/users/gnutester/stability/work/trunk/64/install
--enable-bootstrap=no --enable-languages=c,c++,fortran
Thread model: posix
gcc version 7.0.0 20160430 (experimental) (GCC)
Testcase:
#include <iostream>
#include <cstdlib>
char a = 0, b = 0, c = 0, d = 0;
int main() {
a = -(b - 405418259) - ((d && c) ^ 2040097152);
if (a != -109)
abort();
}
>From gcc-bugs-return-524132-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 08:30:48 2016
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Subject: [Bug target/70902] [7 Regression] GCC freezes while compiling for 'skylake-avx512' target
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Kirill Yukhin <kyukhin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kyukhin at gcc dot gnu.org,
| |ubizjak at gmail dot com
--- Comment #2 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Started from Uros's r235523.
>From gcc-bugs-return-524131-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 08:30:35 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Wed, 04 May 2016 08:30:00 -0000
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--- Comment #21 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to H.J. Lu from comment #12)
> I still see:
>
> vcvtss2sd (%ecx,%eax,4), %xmm5, %xmm5
>
> without vxorpd.
You are looking in the cold section. This is by design, the splitter is
conditioned on optimize_function_for_speed.
Nevertheless, I'm cleaning a bit float_extend and float_truncate
splitter/peephole2 pattern and will submit the patch soon.
>From gcc-bugs-return-524133-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 08:35:22 2016
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Subject: [Bug target/70941] [5/6/7 Regression] Test miscompiled with -O2.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-04
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |5.4
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r217349.
>From gcc-bugs-return-524134-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 08:50:42 2016
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Subject: [Bug target/70941] [5/6/7 Regression] Test miscompiled with -O2.
Date: Wed, 04 May 2016 08:50:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'd say this is already wrong in the original dump, the narrowing is done
wrongly:
*.original has:
a = (char) (((unsigned char) -((signed char) (d != 0 && c != 0) ^ -128(OVF))
- (unsigned char) b) + 19);
The (OVF) looks fishy and especially the negation performed in signed char
instead of unsigned. So we then have in signed char types:
_1 = _2 ^ -128;
_3 = -_1;
and VRP figures out that for valid program that is only possible if _2 is
non-zero (i.e. if d and c are both non-zero).
But ((d && c) ^ 2040097152) is in the source subtracted in int type rather than
signed char due to promotion, so we need to use unsigned char arithmetics if we
want to narrow it.
>From gcc-bugs-return-524135-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 08:52:02 2016
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Subject: [Bug libstdc++/67085] priority queue should not copy comparators when calling push_heap and pop_heap
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67085
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 70898 has been marked as a duplicate of this bug. ***
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Subject: [Bug libstdc++/70898] Stateful Compare objects are very slow
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Right, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67085#c5
It's a dup. There's no point making two very similar changes to address very
slightly different things.
*** This bug has been marked as a duplicate of bug 67085 ***
>From gcc-bugs-return-524137-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 08:54:18 2016
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Subject: [Bug target/70941] [5/6/7 Regression] Test miscompiled with -O2.
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
4.9 has
(void) (a = (char) ((-(unsigned char) b - (unsigned char) ((signed char)
((signed char) d != 0 && (signed char) c != 0) ^ -128)) + 19)) >>>>>;
if ((signed char) a != -109)
>From gcc-bugs-return-524138-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 08:55:04 2016
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Subject: [Bug libstdc++/70940] pmr::resource_adaptor requires optional allocator requirements and incorrectly aligns returned pointers.
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>From gcc-bugs-return-524139-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 08:59:09 2016
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Subject: [Bug libstdc++/70893] codecvt incorrectly decodes UTF-16be
Date: Wed, 04 May 2016 08:59:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Кирилл from comment #5)
> It makes no sense, because you can explicitly specify little_endian in the
> template parameters, but not big_endian.
And the standard says that parameter is ignored for codecvt_utf8 and
codecvt_utf8_utf16.
But as I said, the spec is a mess.
Clang's libc++ gives exactly the same result for your testcase as libstdc++
does, so its authors interpreted the spec the same way I did.
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Subject: [Bug target/70941] [5/6/7 Regression] Test miscompiled with -O2.
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That looks fine indeed.
The r217348 to r217349 *.original diff is similar (there is already the (OVF),
but that is probably not it, after all we strip OVF flag away during
gimplification:
- a = (char) ((-(unsigned char) b - (unsigned char) ((signed char) ((signed
char) d != 0 && (signed char) c != 0) ^ -128(OVF))) + 19);
+ a = (char) (((unsigned char) -((signed char) ((signed char) d != 0 &&
(signed char) c != 0) ^ -128(OVF)) - (unsigned char) b) + 19);
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70937
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
Component|middle-end |fortran
Target Milestone|--- |7.0
Summary|[7.0 Regression] ICE: tree |[7 Regression] ICE: tree
|code ‘ssa_name’ is not |code ‘ssa_name’ is not
|supported in LTO streams |supported in LTO streams
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is fallout of gimplify-into-SSA and another case where SAVE_EXPRs inside
type sizes are corrupted. I fixed one testsuite occurance with
2016-05-02 Richard Biener <rguenther@suse.de>
* trans-array.c (gfc_trans_create_temp_array): Properly
create a DECL_EXPR for the anonymous VLA array type.
but suspected more places need fixing. The affected type is constructed via
#0 0x00000000009291a3 in gfc_get_character_type_len_for_eltype (
eltype=<integer_type 0x7ffff688b540 character(kind=1)>,
len=<parm_decl 0x7ffff6a37280 _args>)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans-types.c:1026
#1 0x0000000000929214 in gfc_get_character_type_len (kind=1,
len=<parm_decl 0x7ffff6a37280 _args>)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans-types.c:1036
#2 0x00000000009292d8 in gfc_get_character_type (kind=1, cl=0x26c9420)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans-types.c:1051
#3 0x00000000009293d5 in gfc_typenode_for_spec (spec=0x26c8040)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans-types.c:1095
#4 0x00000000008a78b6 in gfc_build_dummy_array_decl (sym=0x26c8020,
dummy=<parm_decl 0x7ffff6a37300 args>)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans-decl.c:1106
#5 0x00000000008a8dad in gfc_get_symbol_decl (sym=0x26c8020)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans-decl.c:1471
#6 0x00000000008b6e4d in generate_local_decl (sym=0x26c8020)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans-decl.c:5220
#7 0x000000000085fd94 in do_traverse_symtree (st=0x26c77b0, st_func=0x0,
sym_func=0x8b6d89 <generate_local_decl(gfc_symbol*)>)
at /space/rguenther/src/svn/trunk/gcc/fortran/symbol.c:3817
and it needs to be handled similarly. Possibly somewhere here:
#4 0x00000000008a78b6 in gfc_build_dummy_array_decl (sym=0x26c8020,
dummy=<parm_decl 0x7ffff6a37300 args>)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans-decl.c:1106
1106 : gfc_typenode_for_spec (&sym->ts);
(gdb) l
1101 }
1102
1103 /* For classarrays the element type is required, but
1104 gfc_typenode_for_spec () returns the array descriptor. */
1105 type = is_classarray ? gfc_get_element_type (type)
1106 : gfc_typenode_for_spec (&sym->ts);
1107 type = gfc_get_nodesc_array_type (type, as, packed,
1108 !sym->attr.target);
or here:
#5 0x00000000008a8dad in gfc_get_symbol_decl (sym=0x26c8020)
at /space/rguenther/src/svn/trunk/gcc/fortran/trans-decl.c:1471
1471 decl = gfc_build_dummy_array_decl (sym, sym->backend_decl);
(gdb) l
1466
1467 /* Use a copy of the descriptor for dummy arrays. */
1468 if ((sym->attr.dimension || sym->attr.codimension)
1469 && !TREE_USED (sym->backend_decl))
1470 {
1471 decl = gfc_build_dummy_array_decl (sym, sym->backend_decl);
1472 /* Prevent the dummy from being detected as unused if it is
copied. */
1473 if (sym->backend_decl != NULL && decl != sym->backend_decl)
1474 DECL_ARTIFICIAL (sym->backend_decl) = 1;
1475 sym->backend_decl = decl;
>From gcc-bugs-return-524142-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 09:02:42 2016
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Subject: [Bug debug/70935] [6/7 Regression] ICE: verify_ssa failed (error: definition in block 9 does not dominate use in block 12) w/ -O3 -g
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |ienkovich at gcc dot gnu.org
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Subject: [Bug c++/70939] creating object of abstract class allowed in all versions of g++
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug fortran/70931] [4.9/5/6/7 Regression] ICE with -g in native_encode_initializer, bei dwarf2out.c:17768
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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> ---
I think this is a corner-case of native_encode_initializer not handling
zero-sized FIELD_DECLs.
Index: gcc/dwarf2out.c
===================================================================
--- gcc/dwarf2out.c (revision 235859)
+++ gcc/dwarf2out.c (working copy)
@@ -17806,7 +17806,7 @@ native_encode_initializer (tree init, un
fieldsize = tree_to_shwi (DECL_SIZE_UNIT (field));
pos = int_byte_position (field);
gcc_assert (pos + fieldsize <= size);
- if (val
+ if (val && fieldsize != 0
&& !native_encode_initializer (val, array + pos, fieldsize))
return false;
}
fixes it.
>From gcc-bugs-return-524145-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 09:11:13 2016
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Subject: [Bug lto/70929] [4.9/5/6/7 regression] Cross-module inlining for functions having argument passed by reference is no longer working.
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Looks reasonable if it can get some baking time on trunk.
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Subject: [Bug fortran/70931] [4.9/5/6/7 Regression] ICE with -g in native_encode_initializer, bei dwarf2out.c:17768
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug target/70941] [5/6/7 Regression] Test miscompiled with -O2.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-524148-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 09:25:20 2016
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Subject: [Bug rtl-optimization/70902] [7 Regression] GCC freezes while compiling for 'skylake-avx512' target
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Uroš Bizjak <ubizjak at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Kirill Yukhin from comment #2)
> Started from Uros's r235523.
This is kind of expected, the referred commit enabled SSE spills for the first
time, and apparently triggers some problems in LRA.
>From gcc-bugs-return-524150-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 09:34:25 2016
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--- Comment #1 from Truls Johnsen <trulsjo at gmail dot com> ---
Reduced the test case to only include <initializer_list> and changed max to a
one-liner that still shows the same behavior. Removing constexpr from max, or
the (unused) template from a() makes the code compile:
#include <initializer_list>
constexpr
int
max(std::initializer_list<int> __l)
{ return *__l.begin(); }
template <class Src>
void
a() {
const int v = max({1});
}
I forgot to mention the host in the initial report:
Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz
>From gcc-bugs-return-524149-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 09:34:05 2016
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From: "vittorio.romeo at outlook dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70942] New: [c++14] Incorrect deduction of generic lambda `auto&&` parameter
Date: Wed, 04 May 2016 09:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70942
Bug ID: 70942
Summary: [c++14] Incorrect deduction of generic lambda `auto&&`
parameter
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: critical
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: vittorio.romeo at outlook dot com
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Created attachment 38410
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38410&action=edit
Minimal code example
g++ 6.1 was recently introduced into Arch Linux's testing repositories, and
some of my code that successfully compiled with g++ 5.3.0 does not compile
anymore. I've made a minimal example:
gcc.godbolt.org link:
https://godbolt.org/g/73RTHf
// This code compiles with g++ 5.3.0
// This does not compile with g++ 6.1
#include <type_traits>
#include <utility>
#include <tuple>
#define FWD(...) ::std::forward<decltype(__VA_ARGS__)>(__VA_ARGS__)
struct sinker
{
template <typename T>
void sink(T&)
{
}
};
template <typename T, typename TF>
void caller(T& v, TF&& f)
{
sinker s;
f(s, v);
}
template <typename T>
void interface(T& v)
{
return caller(v, [](auto& xs, auto&& xv) -> decltype(auto)
{
xs.sink(FWD(xv));
});
}
int main()
{
int x = 0;
interface(x);
}
This is the reported error:
: In instantiation of ‘get_impl(T&)::<lambda(auto:1&, auto:2&&)> [with
auto:1 = sinker; auto:2 = int; T = int]’:
:25:58: required by substitution of ‘template<class auto:1, class auto:2>
get_impl(T&)
[with T = int]::<lambda(auto:1&, auto:2&&)>::operator
decltype (((get_impl(T&) [with T = int]::<lambda(auto:1&,
auto:2&&)>)0u).operator()(static_cast<auto:1&>(<anonymous>),
static_cast<auto:2&&>(<anonymous>))) (*)(auto:1&, auto:2&&)() const
[with auto:1 = sinker; auto:2 = int]’
:19:6: required from ‘void chunk_fn_impl(T&, TF&&) [with T = int; TF =
get_impl(T&) [with T = int]::<lambda(auto:1&, auto:2&&)>]’
:25:25: required from ‘void get_impl(T&) [with T = int]’
:36:15: required from here
:27:13: error: invalid initialization of non-const reference of type ‘int&’
from an rvalue of type ‘int’
xs.sink(FWD(md));
^~
:10:10: note: initializing argument 1 of ‘void sinker::sink(T&) [with T =
int]’
void sink(T&)
^~~~
---
Changing:
return caller(v, [](auto& xs, auto&& xv) -> decltype(auto)
to:
return caller(v, [](auto& xs, auto& xv) -> decltype(auto)
allows the code to successfully compile.
---
I do not understand why this error is happening, as `xv` is being
perfectly-forwarded and the `FWD(xv)` call should produce a lvalue reference.
Note that the code worked as intended in g++ 5.3.0 and clang++ 3.7.
gcc.godbolt.org link:
https://godbolt.org/g/73RTHf
Try compiling with multiple g++ versions and changing `auto&&` to `auto&`.
Is this a g++ 6.1 bug? Or was the code incorrectly compiling with previous
versions of g++ and clang++?
---
More information:
http://stackoverflow.com/questions/37023265
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Subject: [Bug c++/70824] cc1plus consumes all available memory on specific template code
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Truls Johnsen <trulsjo at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #38348|0 |1
is obsolete| |
--- Comment #2 from Truls Johnsen <trulsjo at gmail dot com> ---
Created attachment 38411
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38411&action=edit
Preprocessed source for test case only including <initializer_list>
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Subject: [Bug c++/70942] [c++14] Incorrect deduction of generic lambda `auto&&` parameter
Date: Wed, 04 May 2016 09:38:00 -0000
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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> ---
Reduced:
int main()
{
int x = 0;
[](auto&& xv){
static_cast<decltype(xv)>(xv) = 1;
}(x);
}
OK on GCC 5. Fails with a bogus error on 6 and 7:
main.cpp: In instantiation of 'main()::<lambda(auto:1&&)> [with auto:1 = int]':
main.cpp:5:17: required by substitution of 'template<class auto:1>
main()::<lambda(auto:1&&)>::operator decltype
(((main()::<lambda(auto:1&&)>)0u).operator()(static_cast<auto:1&&>(<anonymous>)))
(*)(auto:1&&)() const [with auto:1 = int]'
main.cpp:7:8: required from here
main.cpp:6:39: error: using xvalue (rvalue reference) as lvalue
static_cast<decltype(xv)>(xv) = 1;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70940] pmr::resource_adaptor requires optional allocator requirements and incorrectly aligns returned pointers.
Date: Wed, 04 May 2016 09:38:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also:
__null_memory_resource::do_is_equal() is missing a return statement, so returns
garbage off the stack.
__null_memory_resource doesn't need to be a class template.
new_delete_resource() returns something that:
- doesn't have the required is_equal() behaviour.
- only uses new/delete if std::allocator uses __gnu_cxx::new_allocator.
And another one from Eric:
Your new_delete_resource() also unnecessarily pads the allocation size before
invoking ::operator new, but that isn't a real bug.
>From gcc-bugs-return-524154-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 09:44:33 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70942] [c++14] Incorrect deduction of generic lambda `auto&&` parameter
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70941] [5/6/7 Regression] Test miscompiled with -O2.
Date: Wed, 04 May 2016 09:44:00 -0000
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
The negation issue is a latent fold-const.c issue which when folding
(19 - (unsigned char) b) + (unsigned char) ((signed char) (d != 0 && c != 0) ^
-128(OVF))
runs into the associate: case. We partially fixed this for an ICE with
2016-02-01 Bin Cheng <bin.cheng@arm.com>
PR tree-optimization/67921
* fold-const.c (split_tree): New parameters. Convert pointer
type variable part to proper type before negating.
(fold_binary_loc): Pass new arguments to split_tree.
but appearantly the "real" fix never materialized.
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Subject: [Bug target/70941] [5/6/7 Regression] Test miscompiled with -O2.
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
The following fixes this.
Index: gcc/fold-const.c
===================================================================
--- gcc/fold-const.c (revision 235859)
+++ gcc/fold-const.c (working copy)
@@ -838,9 +838,8 @@ split_tree (location_t loc, tree in, tre
*conp = negate_expr (*conp);
if (neg_var_p)
{
- /* Convert to TYPE before negating a pointer type expr. */
- if (var && POINTER_TYPE_P (TREE_TYPE (var)))
- var = fold_convert_loc (loc, type, var);
+ /* Convert to TYPE before negating. */
+ var = fold_convert_loc (loc, type, var);
var = negate_expr (var);
}
}
@@ -863,9 +862,8 @@ split_tree (location_t loc, tree in, tre
else if (*minus_litp)
*litp = *minus_litp, *minus_litp = 0;
*conp = negate_expr (*conp);
- /* Convert to TYPE before negating a pointer type expr. */
- if (var && POINTER_TYPE_P (TREE_TYPE (var)))
- var = fold_convert_loc (loc, type, var);
+ /* Convert to TYPE before negating. */
+ var = fold_convert_loc (loc, type, var);
var = negate_expr (var);
}
>From gcc-bugs-return-524157-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 09:58:19 2016
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Subject: [Bug c++/70943] New: 'conflicting declaration' error with repeated typedefs in function templates
Date: Wed, 04 May 2016 09:58:00 -0000
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Bug ID: 70943
Summary: 'conflicting declaration' error with repeated typedefs
in function templates
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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template<class T>
void foo(T t) {
using meow = T;
using meow = int;
}
template void foo(int);
Accepted by clang, rejected by GCC:
main.cpp: In function 'void foo(T)':
main.cpp:4:21: error: conflicting declaration 'using meow = '
using meow = int;
^
main.cpp:3:19: note: previous declaration as 'using meow = T'
using meow = T;
>From gcc-bugs-return-524158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 10:12:53 2016
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70944] New: [7 Regression] ICE in immed_wide_int_const, at emit-rtl.c:606 with -O3
Date: Wed, 04 May 2016 10:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70944
Bug ID: 70944
Summary: [7 Regression] ICE in immed_wide_int_const, at
emit-rtl.c:606 with -O3
Product: gcc
Version: 7.0
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As mentioned in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70396#c5,
after Richi's fix for PR70396, I still see very similar issue.
$ cat tc.ii
void fn1() {
unsigned *a = 0;
for (int i; i; ++i) {
unsigned g(a[i] << 8 >> 24);
a[i] = g;
}
}
$ /home/marxin/bin/gcc2/lib/gcc/x86_64-pc-linux-gnu/7.0.0/cc1plus
-fpreprocessed tc.ii -march=haswell -mmmx -mno-3dnow -msse -msse2 -msse3
-mssse3 -mno-sse4a -mcx16 -msahf -mmovbe -maes -mno-sha -mpclmul -mpopcnt -mabm
-mno-lwp -mfma -mno-fma4 -mno-xop -mbmi -mbmi2 -mno-tbm -mavx -mavx2 -msse4.2
-msse4.1 -mlzcnt -mno-rtm -mno-hle -mrdrnd -mf16c -mfsgsbase -mno-rdseed
-mno-prfchw -mno-adx -mfxsr -mxsave -mxsaveopt -mno-avx512f -mno-avx512er
-mno-avx512cd -mno-avx512pf -mno-prefetchwt1 -mno-clflushopt -mno-xsavec
-mno-xsaves -mno-avx512dq -mno-avx512bw -mno-avx512vl -mno-avx512ifma
-mno-avx512vbmi -mno-clwb -mno-pcommit -mno-mwaitx -mno-clzero -mno-pku --param
l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=8192
-mtune=haswell -quiet -dumpbase tc.ii -O3
tc.ii:7:1: internal compiler error: in immed_wide_int_const, at emit-rtl.c:606
}
^
0xa4cf35 immed_wide_int_const(generic_wide_int<wide_int_ref_storage<false> >
const&, machine_mode)
../../gcc/emit-rtl.c:606
0x13929a9 change_zero_ext
../../gcc/combine.c:11111
0x13937d8 recog_for_combine
../../gcc/combine.c:11148
0x13a175d try_combine
../../gcc/combine.c:3503
0x13a6fc1 combine_instructions
../../gcc/combine.c:1288
0x13a6fc1 rest_of_handle_combine
../../gcc/combine.c:14348
0x13a6fc1 execute
../../gcc/combine.c:14391
Thanks
>From gcc-bugs-return-524159-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 10:14:25 2016
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Subject: [Bug tree-optimization/70396] ICE on valid code at -O3 in 32-bit and 64-bit modes on x86_64-linux-gnu (in immed_wide_int_const, at emit-rtl.c:606)
Date: Wed, 04 May 2016 10:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
See PR70944.
>From gcc-bugs-return-524160-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 10:15:46 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70944] [7 Regression] ICE in immed_wide_int_const, at emit-rtl.c:606 with -O3
Date: Wed, 04 May 2016 10:15:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-04
Known to work| |6.1.0
Target Milestone|--- |7.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed with -O3 -march=core-avx2
>From gcc-bugs-return-524161-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 10:19:15 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/70944] [7 Regression] ICE in immed_wide_int_const, at emit-rtl.c:606 with -O3
Date: Wed, 04 May 2016 10:19:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'd say we really don't want vector mode ZERO_EXTRACTs/SIGN_EXTRACTs, so
perhaps
make_extraction could give up in that case, maybe:
/* Never narrow an object, since that might not be safe. */
if (mode != VOIDmode
&& GET_MODE_SIZE (extraction_mode) < GET_MODE_SIZE (mode))
extraction_mode = mode;
and inside of if just do
{
/* Avoid vector mode extractions. */
if (VECTOR_MODE_P (mode))
return NULL_RTX;
extraction_mode = mode;
}
Or should we punt even earlier?
>From gcc-bugs-return-524162-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 11:00:47 2016
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/70945] New: Offloading: compatibility of target and offloading toolchains
Date: Wed, 04 May 2016 11:00:00 -0000
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Bug ID: 70945
Summary: Offloading: compatibility of target and offloading
toolchains
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: openacc, openmp
Severity: enhancement
Priority: P3
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CC: jakub at gcc dot gnu.org
Target Milestone: ---
It has been established that for offloading compilation, the target and
offloading toolchains need to be compatible (for example: data types; bit-wise
copying of data).
For OpenACC/OpenMP, offloading is implemented such that the target compiler
already applies certains transformations to the source code before handing over
to the offloading compilers an intermediate representation of the relevant
pieces.
Looking at one specific example: inclusion of <math.h> under the presence of
-ffinite-math-only (as implied by -ffast-math, or -Ofast). The (glibc)
<math.h> will then (__FINITE_MATH_ONLY__) include <bits/math-finite.h> for
"special entry points to use when the compiler got told to only expect finite
results". In the configuration that I'm looking at right now, this works by
diverting the math functions' assembler names from "[function]" to
"__[function]_finite". This is a "bits/[...]" header file, that is applicable
only to this one target's glibc configuration. For nvptx offloading, for
example, we use newlib which doesn't provide these finite math entry points, so
when using the "log" function in offloaded code, you'll see the compilation
fail because of "unresolved symbol __log_finite".
The problem basically is that there is a mis-match between early
transformations done by the target compiler (such as via header files, or done
early in the compiler internally), that are not actually valid for the
offloading compilers. Instead of playing "rat race", trying to make the target
and offloading toolchains/compilers/ABIs match completely (which probably isn't
even possible in the general case), can we maybe find a better solution?
Of course, this problem is applicable only if we agree that it is valid to use
such functions in offlodead regions, which indeed is debatable for a lot of
standard library functions, but for math functions clearly users expect to be
allowed to use them. Also consider Fortran, where such functions are actually
part of the language.
>From gcc-bugs-return-524163-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 12:00:55 2016
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Subject: =?UTF-8?B?W0J1ZyBmb3J0cmFuLzcwOTM3XSBbNyBSZWdyZXNzaW9uXSBJQ0U6IHRyZWUg?= =?UTF-8?B?Y29kZSDigJhzc2FfbmFtZeKAmSBpcyBub3Qgc3VwcG9ydGVkIGluIExUTyBz?= =?UTF-8?B?dHJlYW1z?Date: Wed, 04 May 2016 12:00:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
I saw similar error with 465.tonto and 481.wrf from SPEC CPU 2006.
>From gcc-bugs-return-524164-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 12:04:52 2016
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From: "wdijkstr at arm dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70946] New: Bad interaction between IVOpt and loop unrolling
Date: Wed, 04 May 2016 12:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70946
Bug ID: 70946
Summary: Bad interaction between IVOpt and loop unrolling
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: wdijkstr at arm dot com
Target Milestone: ---
IVOpt chooses between using indexing for induction variables or incrementing
pointers. Due to way loop unrolling works, a decision that is optimal if
unrolling is disabled may become very non-optimal with unrolling.
Below are simple examples that show how the choice to use indexing can become a
very bad idea when unrolled, while using offset addressing leads to very decent
code. To improve this we either to teach IVOpt about unrolling (eg. prioritise
base+offset addressing) or add a tree unroller that unrolls small inner loops
before IVOpt.
void loop1 (int *p, int *q, int i)
{
for (i = 0; i < 1000; i++) p[i] = q[i] + 1;
}
void loop2 (int *p, int i)
{
for (i = 0; i < 1000; i++) p[i] = p[i] + 1;
}
On AArch64 with -O2 -funroll-loops this gives:
loop1:
mov x2, 0
.p2align 2
.L41:
ldr w4, [x1, x2]
add x3, x2, 4
add x10, x2, 8
add x9, x2, 12
add w5, w4, 1
str w5, [x0, x2]
add x8, x2, 16
add x7, x2, 20
add x6, x2, 24
add x11, x2, 28
ldr w12, [x1, x3]
add x2, x2, 32
cmp x2, 4000
add w13, w12, 1
str w13, [x0, x3]
ldr w14, [x1, x10]
add w15, w14, 1
str w15, [x0, x10]
ldr w16, [x1, x9]
add w17, w16, 1
str w17, [x0, x9]
ldr w18, [x1, x8]
add w4, w18, 1
str w4, [x0, x8]
ldr w3, [x1, x7]
add w10, w3, 1
str w10, [x0, x7]
ldr w9, [x1, x6]
add w5, w9, 1
str w5, [x0, x6]
ldr w8, [x1, x11]
add w7, w8, 1
str w7, [x0, x11]
bne .L41
ret
loop2:
add x6, x0, 4000
.p2align 2
.L51:
mov x1, x0
ldr w2, [x0]
add x0, x0, 32
add w3, w2, 1
cmp x0, x6
str w3, [x1], 4
ldr w4, [x0, -28]
add w5, w4, 1
str w5, [x0, -28]
ldr w7, [x1, 4]
add w8, w7, 1
str w8, [x1, 4]
ldp w9, w10, [x0, -20]
ldp w11, w12, [x0, -12]
add w14, w9, 1
ldr w13, [x0, -4]
add w15, w10, 1
add w16, w11, 1
add w17, w12, 1
add w18, w13, 1
stp w14, w15, [x0, -20]
stp w16, w17, [x0, -12]
str w18, [x0, -4]
bne .L51
ret
>From gcc-bugs-return-524165-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 12:09:31 2016
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Subject: [Bug libstdc++/70940] pmr::resource_adaptor requires optional allocator requirements and incorrectly aligns returned pointers.
Date: Wed, 04 May 2016 12:09:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed May 4 12:08:45 2016
New Revision: 235868
URL: https://gcc.gnu.org/viewcvs?rev=235868&root=gcc&view=rev
Log:
libstdc++/70940 Start fixing polymorphic memory resources
PR libstdc++/70940
* include/experimental/memory_resource
(__resource_adaptor_imp::do_allocate): Do not default-construct
rebound allocator.
(__resource_adaptor_imp::do_deallocate): Likewise. Use
allocator_traits to get pointer type.
(__null_memory_resource::do_allocate): Remove unused parameters.
(__null_memory_resource::do_deallocate): Likewise.
(__null_memory_resource::do_is_equal): Likewise. Add return statement.
* testsuite/experimental/type_erased_allocator/1.cc: Combine with ...
* testsuite/experimental/type_erased_allocator/1_neg.cc: This, and
move to ...
* testsuite/experimental/memory_resource/1.cc: Here.
* testsuite/experimental/memory_resource/null_memory_resource.cc: New.
* testsuite/experimental/memory_resource/resource_adaptor.cc: New.
Added:
trunk/libstdc++-v3/testsuite/experimental/memory_resource/
trunk/libstdc++-v3/testsuite/experimental/memory_resource/1.cc
- copied, changed from r235859,
trunk/libstdc++-v3/testsuite/experimental/type_erased_allocator/1.cc
trunk/libstdc++-v3/testsuite/experimental/memory_resource/null_memory_resource.cc
- copied, changed from r235859,
trunk/libstdc++-v3/testsuite/experimental/type_erased_allocator/1_neg.cc
trunk/libstdc++-v3/testsuite/experimental/memory_resource/resource_adaptor.cc
Removed:
trunk/libstdc++-v3/testsuite/experimental/type_erased_allocator/1.cc
trunk/libstdc++-v3/testsuite/experimental/type_erased_allocator/1_neg.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/experimental/memory_resource
>From gcc-bugs-return-524167-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 12:11:36 2016
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Subject: [Bug rtl-optimization/70946] Bad interaction between IVOpt and loop unrolling
Date: Wed, 04 May 2016 12:11:00 -0000
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--- Comment #1 from Wilco <wdijkstr at arm dot com> ---
PR36712 seems related to this
>From gcc-bugs-return-524166-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 12:11:02 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70940] pmr::resource_adaptor requires optional allocator requirements and incorrectly aligns returned pointers.
Date: Wed, 04 May 2016 12:11:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Target Milestone|--- |6.2
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Eric Fiselier from comment #0)
> resource_adapter incorrectly requires that the Allocator provide:
> * A pointer typedef.
> * A default constructor.
Those errors are fixed on trunk now.
(In reply to Jonathan Wakely from comment #1)
> Also:
>
> __null_memory_resource::do_is_equal() is missing a return statement, so
> returns garbage off the stack.
So is this.
The rest isn't yet.
>From gcc-bugs-return-524168-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 12:28:24 2016
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From: "amodra at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70947] New: regrename Go breakage on powerpc64
Date: Wed, 04 May 2016 12:28:00 -0000
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Bug ID: 70947
Summary: regrename Go breakage on powerpc64
Product: gcc
Version: 7.0
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Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
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Instructions around a __morestack call typically have r0, used to save and
restore lr, replaced with other regs by regrename. This trashes the current
function parameter and return regs.
=> 0x0000000010001550 <+112>: mflr r3 # argc trashed
0x0000000010001554 <+116>: std r3,16(r1)
0x0000000010001558 <+120>: bl 0x10001818 <__morestack>
0x000000001000155c <+124>: ld r4,16(r1)
0x0000000010001560 <+128>: mtlr r4
0x0000000010001564 <+132>: blr
0x0000000010001568 <+136>: b 0x100014fc <main+28>
>From gcc-bugs-return-524169-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 12:28:59 2016
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Alan Modra <amodra at gmail dot com> changed:
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
The following patch fixes the testcase (otherwise untested). Maybe the first
fix can be absorbed into this as well. I'll have some time on friday to
continue investigating how the fortran FE works but eventually fortran people
can lend me a hand here given the following hint.
(a little testing shows the assert triggers, needs investigation)
Index: gcc/fortran/trans-decl.c
===================================================================
--- gcc/fortran/trans-decl.c (revision 235859)
+++ gcc/fortran/trans-decl.c (working copy)
@@ -6012,6 +6012,22 @@ finish_oacc_declare (gfc_namespace *ns,
return;
}
+static stmtblock_t *place_decl_expr_init;
+static void
+place_decl_expr (gfc_symbol *sym)
+{
+ if (sym->backend_decl
+ && variably_modified_type_p (TREE_TYPE (sym->backend_decl), NULL))
+ {
+ tree type = TREE_TYPE (sym->backend_decl);
+ while (POINTER_TYPE_P (type))
+ type = TREE_TYPE (type);
+ gcc_assert (TYPE_NAME (type));
+ gfc_add_expr_to_block (place_decl_expr_init,
+ build1 (DECL_EXPR, type, TYPE_NAME (type)));
+ }
+}
+
/* Generate code for a function. */
@@ -6088,6 +6104,9 @@ gfc_generate_function_code (gfc_namespac
has_coarray_vars = false;
generate_local_vars (ns);
+ place_decl_expr_init = &init;
+ gfc_traverse_ns (ns, place_decl_expr);
+
if (flag_coarray == GFC_FCOARRAY_LIB && has_coarray_vars)
generate_coarray_init (ns);
>From gcc-bugs-return-524171-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 12:55:44 2016
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, ->backend_decl isn't always a decl. Thus sth like the following (I suppose
the check should be done in fortran terms rather than looking at backend_decl)
static void
place_decl_expr (gfc_symbol *sym)
{
if (sym->backend_decl)
{
tree type = sym->backend_decl;
if (DECL_P (sym->backend_decl))
type = TREE_TYPE (type);
else
gcc_assert (TYPE_P (type));
while (POINTER_TYPE_P (type))
type = TREE_TYPE (type);
if (variably_modified_type_p (type, NULL))
{
if (TYPE_NAME (type))
gfc_add_expr_to_block (place_decl_expr_init,
build1 (DECL_EXPR, type, TYPE_NAME (type)));
}
}
}
>From gcc-bugs-return-524172-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 12:58:07 2016
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Subject: [Bug rtl-optimization/70946] Bad interaction between IVOpt and loop unrolling
Date: Wed, 04 May 2016 12:58:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
IVO before unrolling is never going to be optimal.
>From gcc-bugs-return-524173-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 13:11:07 2016
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Subject: [Bug middle-end/70807] fwprop pass ICE with incoming CDI_DOMINATORS
Date: Wed, 04 May 2016 13:11:00 -0000
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Ilya Enkovich <ienkovich at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ienkovich at gcc dot gnu.org
--- Comment #3 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
I see CSE invalidates dominance info via delete_insn_and_edges and doesn't fix
or free it.
>From gcc-bugs-return-524174-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 13:20:24 2016
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Started at r235817.
Which patch should I test?
>From gcc-bugs-return-524175-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 13:26:48 2016
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Subject: [Bug tree-optimization/70948] New: [7 Regression] r235622 caused gcc.c-torture/execute/va-arg-pack-1.c execution failure AArch64
Date: Wed, 04 May 2016 13:26:00 -0000
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Bug ID: 70948
Summary: [7 Regression] r235622 caused
gcc.c-torture/execute/va-arg-pack-1.c execution
failure AArch64
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: jiwang at gcc dot gnu.org
CC: rguenth at gcc dot gnu.org
Target Milestone: ---
Target: aarch64*
Noticed the following regression on aarch64 after r235622
2016-04-29 Richard Biener <rguenther@suse.de>
PR tree-optimization/13962
PR tree-optimization/65686
* tree-ssa-alias.h (ptrs_compare_unequal): Declare.
* tree-ssa-alias.c (ptrs_compare_unequal): New function
using PTA to compare pointers.
* match.pd: Add pattern for pointer equality compare simplification
using ptrs_compare_unequal.
make check RUNTESTFLAGS="execute.exp=va-arg-pack-1.c"
FAIL: gcc.c-torture/execute/va-arg-pack-1.c -O2 execution test
FAIL: gcc.c-torture/execute/va-arg-pack-1.c -O3 -g execution test
FAIL: gcc.c-torture/execute/va-arg-pack-1.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none execution test
FAIL: gcc.c-torture/execute/va-arg-pack-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects execution test
>From gcc-bugs-return-524176-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 13:37:18 2016
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Subject: [Bug other/70945] Offloading: compatibility of target and offloading toolchains
Date: Wed, 04 May 2016 13:37:00 -0000
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |amonakov at gcc dot gnu.org
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
I don't think there's a reasonable way to "solve" this apart from saying that
complete ABI compatibility is required, and enumerating rare exceptions where
it's not.
Like you say, storage layout must be the same: size/align of all types must
match (note this isn't true today for 'long double' and it's not even
diagnosed), but also endianness, signedness of 'char'. Layout of _Complex
types. Layout of structs that library functions operate on (e.g. div_t). As an
exception, va_list type need not match, because data of this type is not usable
on both host and accel sides.
Typedefs must match, even if underlying types happen to be binary compatible
(e.g. C++ mangled name of '::operator new' differs based on whether size_t is
'unsigned' or 'unsigned long').
Basically I'd say that host compilation environment establishes an ABI baseline
that the accel environment must follow. In your finite-math example, the
problem exists due to an ABI extension in Glibc (note that the custom name
could equally happen to be __glibc_log_finite). You'd see the same issue
trying to run a new binary on old Glibc systems that didn't have that symbol
yet, and now Glibc itself is bound to carry that entrypoint forever. And note
that the issue is not limited to math symbols either: with -D_FORTIFY_SOURCE,
plain 'printf' may become '__printf_chk', which would also fail to link on
Newlib.
Is there any actual issue with Fortran functions? As I understand, they are
provided by libgfortran, so ABI incompatibilities due to source-level
differences, like in Glibc-vs-Newlib above, don't exist. If there are ABI
issues due to other reasons, it should be reasonable to just fix those.
>From gcc-bugs-return-524177-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 13:44:48 2016
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Subject: [Bug rtl-optimization/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Wed, 04 May 2016 13:44:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |ubizjak at gmail dot com
--- Comment #22 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 38412
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38412&action=edit
Proposed patch
This patch moves all TARGET_SSE_PARTIAL_REG_DEPENDENCY FP conversion splitters
to a later split pass. Plus, the patch substantially cleans these and related
patterns.
The functionality of post-reload conversion splitters goes this way:
- process FP conversions for TARGET_USE_VECTOR_FP_CONVERTS in an early
post-reload splitter. This pass will rewrite FP conversions to vector insns and
is thus incompatible with the next two passes. AMDFAM10 processors depend on
this transformation.
- process FP conversions for TARGET_SPLIT_MEM_OPND_FOR_FP_CONVERTS in a
peephole2 pass. This will transform mem->reg insns to reg->reg insns, and these
insn could be processed by the next pass. Some Intel processors depend on this
transformation.
- process FP conversions for TARGET_SSE_PARTIAL_REG_DEPENDENCY in a late
post-reload splitter, when allocated registers are stable. AMD and Intel
processors depend on this pass, so it is part of generic tuning.
>From gcc-bugs-return-524179-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 13:47:55 2016
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Subject: [Bug c/48778] gcc 4.6 -Waddress adds unhelpful new warning case when using from a macro
Date: Wed, 04 May 2016 13:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48778
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed, for some definition of "fixed".
>From gcc-bugs-return-524178-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 13:47:03 2016
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Subject: [Bug c/48778] gcc 4.6 -Waddress adds unhelpful new warning case when using from a macro
Date: Wed, 04 May 2016 13:47:00 -0000
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed May 4 13:46:15 2016
New Revision: 235878
URL: https://gcc.gnu.org/viewcvs?rev=235878&root=gcc&view=rev
Log:
PR c/48778
* c-typeck.c (build_binary_op): Don't issue -Waddress warnings
for macro expansions.
* gcc.dg/Waddress-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/Waddress-2.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-typeck.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/70804] Missed tail-call
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Alexander Monakov <amonakov at gcc dot gnu.org> changed:
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--- Comment #4 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Closing as invalid per the previous comment.
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Subject: [Bug c/70371] Number added worng
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
.
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From: "ed at catmur dot co.uk" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/60027] Problem with braced-init-lists and explicit ctors
Date: Wed, 04 May 2016 14:14:00 -0000
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Ed Catmur <ed at catmur dot co.uk> changed:
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--- Comment #1 from Ed Catmur <ed at catmur dot co.uk> ---
This is correct.
[over.match.list]:
[...] In copy-list-initialization, if an explicit constructor is chosen, the
initialization is ill-formed. [ Note: This differs from other situations
([over.match.ctor], [over.match.copy]), where only converting constructors are
considered for copy-initialization. This restriction only applies if this
initialization is part of the final result of overload resolution. — end note ]
See also: https://llvm.org/bugs/show_bug.cgi?id=27642
http://stackoverflow.com/questions/34622076/calling-an-explicit-constructor-with-a-braced-init-list-ambiguous-or-not?rq=1
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Subject: [Bug c/70930] VLAs in stucts in loop headers are not evaluated each iteration
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-524184-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 14:20:11 2016
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Subject: [Bug target/68945] enable libcilkrts on SPARC
Date: Wed, 04 May 2016 14:20:00 -0000
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--- Comment #9 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 38413
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38413&action=edit
sparcv9 support patch
This patch (on top of the previous one) fixes the sparcv9 failures reported
before.
As I'd suspected, the problem was that the code didn't take the SPARC V9 stack
bias into account: in a couple of places, the stack and frame pointers in the
__builtin_setjmp/__builtin_longjmp internal jmpbuf are overwritten with
unbiased
addresses.
The patch includes both debugging code (assertions to check that the stack
pointer
is either biased or unbiased) and CILK_ADJUST_SP/CILK_UNADJUST_SP macros to
turn
a stack pointer from unbiased to biased form.
The patch is enough to successfully run all Cilk Plus in the gcc and g++
testsuites
successfully on sparc-sun-solaris2.10, but there may be code paths that also
need
adjustments.
I'm just posting the patch (which is relative to upstream libcilkrts, which
should
be merged into mainline any day now) for reference and comments.
Rainer
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Subject: [Bug tree-optimization/70771] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in operator[], at vec.h:714
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed?
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Subject: [Bug tree-optimization/70775] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: Segmentation fault
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed?
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Subject: [Bug c++/70938] internal compiler error: in tsubst_copy, at cp/pt.c:13008
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-04
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed in r234442 for GCC 6 and GCC 7.
>From gcc-bugs-return-524189-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 14:32:39 2016
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Subject: [Bug tree-optimization/70771] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in operator[], at vec.h:714
Date: Wed, 04 May 2016 14:32:00 -0000
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amker at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #6 from amker at gcc dot gnu.org ---
Yes, fixed.
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Subject: [Bug tree-optimization/70775] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: Segmentation fault
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amker at gcc dot gnu.org changed:
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--- Comment #5 from amker at gcc dot gnu.org ---
Yes, fixed.
>From gcc-bugs-return-524190-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 14:38:08 2016
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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/70051] ubsan doesn't detect VLA overflow
Date: Wed, 04 May 2016 14:38:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Isn't this a dup of PR68065?
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70932] flexible array member with non-trivial destructor
Date: Wed, 04 May 2016 14:54:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-04
Known to work| |4.9.3, 5.3.0
Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |6.1.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The problem was introduced r233126 as a result of switching the internal
flexible array representation to use a null type domain. Prior to 6.1, GCC
treated flexible array members the same as arrays of zero elements.
I'll have to think about what the right solution is: reject flexible array
members with non-trivial destructors with a better error (like clang does) or
allow them with a warning. My concern with allowing them is that while G++ 6.1
allows them to be initialized (5.x rejects the initialization which seems like
a bug), it won't be able to invoke their destructor in code like this:
struct A {
int i;
~A() { __builtin_printf ("%s\n", __PRETTY_FUNCTION__); }
};
struct S {
int i;
A a[];
};
int main ()
{
S s = { 3, { 1, 2, 3 } };
}
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Subject: [Bug fortran/50410] [4.9/5/6/7 Regression] ICE in record_reference
Date: Wed, 04 May 2016 15:01:00 -0000
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--- Comment #23 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
These variants give :
$ cat z1.f90
program p
type ta
integer :: a
end type
type t
type(ta), pointer :: b
end type
type(t) :: z
data z / t(ta(1)) /
end
$ gfortran-6 z1.f90
f951: internal compiler error: in record_reference, at cgraphbuild.c:64
$ cat z2.f90
program p
type ta
integer :: a
end type
type t
type(ta) :: b
end type
type(t), pointer :: z
data z / t(ta(1)) /
end
$ gfortran-6 z2.f90
f951: internal compiler error: in record_reference, at cgraphbuild.c:64
$ cat z3.f90
program p
type ta
integer :: a
end type
type t
type(ta), pointer :: b
end type
type(t), pointer :: z
data z / t(ta(1)) /
end
$ gfortran-6 z3.f90
internal compiler error: in fold_convert_loc, at fold-const.c:2256
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/50410] [4.9/5/6/7 Regression] ICE in record_reference
Date: Wed, 04 May 2016 15:03:00 -0000
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--- Comment #24 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
And an exotic case :
$ cat z5.f90
module m
real, target :: a[*]
real, pointer :: z => a
end
$ gfortran-6 -fcoarray=lib -c z5.f90
f951: internal compiler error: in record_reference, at cgraphbuild.c:64
$ cat z6.f90
program p
real, target :: a[*]
real, pointer :: z => a
end
$ gfortran-6 -fcoarray=lib -finit-local-zero -c z6.f90
internal compiler error: in fold_convert_loc, at fold-const.c:2256
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/70051] ubsan doesn't detect VLA overflow
Date: Wed, 04 May 2016 15:04:00 -0000
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--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The bug here I believe is in how/where the C++ front end calls the sanitizer to
detect the overflow. With PR69517 resolved by having the C++ front end throw
an exception, this bug will become largely a non-issue (except with
-fno-exceptions it will still need to be fixed), but PR68065 won't.
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From: "gerhard.steinmetz.fortran@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70949] New: ICE in propagate_necessity, at tree-ssa-dce.c:924
Date: Wed, 04 May 2016 15:04:00 -0000
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Bug ID: 70949
Summary: ICE in propagate_necessity, at tree-ssa-dce.c:924
Product: gcc
Version: 6.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: gerhard.steinmetz.fortran@t-online.de
Target Milestone: ---
Compiling with optimization level -Og, -Os, -O1 or higher :
(affects older gfortran versions too)
$ cat z1.f90
program p
type t1
end type
type t2
type(t1), pointer :: q
end type
type(t1), pointer :: a
type(t2) :: c
allocate(a)
c%q => a
print *, 'a', associated(a, f(c))
contains
function f(x) result (z)
type(t2), intent(in) :: x
class(t1), pointer :: z
z => x%q
end
end
$ gfortran-6 -O2 z1.f90
z1.f90:12:0:
print *, 'a', associated(a, f(c))
internal compiler error: in propagate_necessity, at tree-ssa-dce.c:924
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Subject: [Bug fortran/70949] ICE in propagate_necessity, at tree-ssa-dce.c:924
Date: Wed, 04 May 2016 15:06:00 -0000
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--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
This variant works :
(as known from several other PRs : change "class" to "type")
$ cat z2.f90
program p
type t1
end type
type t2
type(t1), pointer :: q
end type
type(t1), pointer :: a
type(t2) :: c
allocate(a)
c%q => a
print *, 'a', associated(a, f(c))
contains
function f(x) result (z)
type(t2), intent(in) :: x
type(t1), pointer :: z
z => x%q
end
end
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Subject: [Bug middle-end/70877] [MPX] ICE in in convert_move
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Subject: [Bug tree-optimization/70876] ICE in chkp_find_bounds: Unexpected tree code with_size_expr
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>From gcc-bugs-return-524199-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 15:11:10 2016
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From: "gerhard.steinmetz.fortran@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70950] New: ICE with -O0 in simplify_subreg, at simplify-rtx.c:5895
Date: Wed, 04 May 2016 15:11:00 -0000
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Bug ID: 70950
Summary: ICE with -O0 in simplify_subreg, at
simplify-rtx.c:5895
Product: gcc
Version: 6.1.1
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This error message is generated with optimization level -O0 :
(affects older gfortran versions too)
$ cat z1.f90
program p
type t1
end type
type t2
type(t1), pointer :: q => null()
end type
type(t1), pointer :: a, b
type(t2) :: c
allocate(a)
call s(a, c)
print *, 'a', associated(a, f(c))
b => f(c)
print *, 'b', associated(a, b)
contains
subroutine s(x, y)
type(t1), pointer :: x
type(t2), intent(out) :: y
y%q => x
end
function f(x) result (z)
type(t2), intent(in) :: x
class(t1), pointer :: z
z => x%q
end
end
$ gfortran-6 -O0 z1.f90
z1.f90:12:0:
print *, 'a', associated(a, f(c))
internal compiler error: in simplify_subreg, at simplify-rtx.c:5895
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70950] ICE with -O0 in simplify_subreg, at simplify-rtx.c:5895
Date: Wed, 04 May 2016 15:12:00 -0000
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--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
Please note : both examples from pr70949 are simplifications of
this PR, thus related. Behaviour differs for -O0 (with/without ICE).
Compiling the example from above with optimization level -Og,
-Os, -O1 or higher shows the same ICE as in PR70949 comment 0.
In total, pr70949 is more or less a subcase.
Code compiles and works if "class" is changed to "type" :
$ cat z2.f90
program p
type t1
end type
type t2
type(t1), pointer :: q => null()
end type
type(t1), pointer :: a, b
type(t2) :: c
allocate(a)
call s(a, c)
print *, 'a', associated(a, f(c))
b => f(c)
print *, 'b', associated(a, b)
contains
subroutine s(x, y)
type(t1), pointer :: x
type(t2), intent(out) :: y
y%q => x
end
function f(x) result (z)
type(t2), intent(in) :: x
type(t1), pointer :: z
z => x%q
end
end
$ gfortran-6 -O0 -g z2.f90
$ a.out
a T
b T
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Wed, 04 May 2016 15:46:00 -0000
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--- Comment #23 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Uroš Bizjak from comment #22)
> Created attachment 38412 [details]
> Proposed patch
>
> This patch moves all TARGET_SSE_PARTIAL_REG_DEPENDENCY FP conversion
> splitters to a later split pass. Plus, the patch substantially cleans these
> and related patterns.
>
> The functionality of post-reload conversion splitters goes this way:
>
> - process FP conversions for TARGET_USE_VECTOR_FP_CONVERTS in an early
> post-reload splitter. This pass will rewrite FP conversions to vector insns
> and is thus incompatible with the next two passes. AMDFAM10 processors
> depend on this transformation.
>
> - process FP conversions for TARGET_SPLIT_MEM_OPND_FOR_FP_CONVERTS in a
> peephole2 pass. This will transform mem->reg insns to reg->reg insns, and
> these insn could be processed by the next pass. Some Intel processors depend
> on this transformation.
>
> - process FP conversions for TARGET_SSE_PARTIAL_REG_DEPENDENCY in a late
> post-reload splitter, when allocated registers are stable. AMD and Intel
> processors depend on this pass, so it is part of generic tuning.
We need to move those special SSE SF->DF splitters before
(define_split
[(set (match_operand 0 "any_fp_register_operand")
(float_extend (match_operand 1 "memory_operand")))]
"reload_completed
&& (GET_MODE (operands[0]) == TFmode
|| GET_MODE (operands[0]) == XFmode
|| GET_MODE (operands[0]) == DFmode)"
[(set (match_dup 0) (match_dup 2))]
{
operands[2] = find_constant_src (curr_insn);
if (operands[2] == NULL_RTX
|| (SSE_REGNO_P (REGNO (operands[0]))
&& standard_sse_constant_p (operands[2],
GET_MODE (operands[0])) != 1)
|| (STACK_REGNO_P (REGNO (operands[0]))
&& standard_80387_constant_p (operands[2]) < 1))
FAIL;
})
Otherwise, they may not be used on memory operand since the general
SSE (In reply to Uroš Bizjak from comment #22)
> Created attachment 38412 [details]
> Proposed patch
>
> This patch moves all TARGET_SSE_PARTIAL_REG_DEPENDENCY FP conversion
> splitters to a later split pass. Plus, the patch substantially cleans these
> and related patterns.
>
> The functionality of post-reload conversion splitters goes this way:
>
> - process FP conversions for TARGET_USE_VECTOR_FP_CONVERTS in an early
> post-reload splitter. This pass will rewrite FP conversions to vector insns
> and is thus incompatible with the next two passes. AMDFAM10 processors
> depend on this transformation.
>
> - process FP conversions for TARGET_SPLIT_MEM_OPND_FOR_FP_CONVERTS in a
> peephole2 pass. This will transform mem->reg insns to reg->reg insns, and
> these insn could be processed by the next pass. Some Intel processors depend
> on this transformation.
>
> - process FP conversions for TARGET_SSE_PARTIAL_REG_DEPENDENCY in a late
> post-reload splitter, when allocated registers are stable. AMD and Intel
> processors depend on this pass, so it is part of generic tuning.
We need to move those special SSE SF->DF splitters before
(define_split
[(set (match_operand 0 "any_fp_register_operand")
(float_extend (match_operand 1 "memory_operand")))]
"reload_completed
&& (GET_MODE (operands[0]) == TFmode
|| GET_MODE (operands[0]) == XFmode
|| GET_MODE (operands[0]) == DFmode)"
[(set (match_dup 0) (match_dup 2))]
{
operands[2] = find_constant_src (curr_insn);
if (operands[2] == NULL_RTX
|| (SSE_REGNO_P (REGNO (operands[0]))
&& standard_sse_constant_p (operands[2],
GET_MODE (operands[0])) != 1)
|| (STACK_REGNO_P (REGNO (operands[0]))
&& standard_80387_constant_p (operands[2]) < 1))
FAIL;
})
Otherwise, they may not be used on memory operand since the general
SSE float_extend splitter on memory operand will be used.
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Subject: [Bug target/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
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--- Comment #24 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 38414
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38414&action=edit
A patch to move special SSE splitters before general SSE float_extend splitter
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From: "ysrumyan at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/70935] [6/7 Regression] ICE: verify_ssa failed (error: definition in block 9 does not dominate use in block 12) w/ -O3 -g
Date: Wed, 04 May 2016 16:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70935
--- Comment #3 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Jacub,
Here is a simple fix - do not take into consideration edges destination of
which is loop latch block, i.e. loop is endless:
diff --git a/gcc/tree-ssa-loop-unswitch.c b/gcc/tree-ssa-loop-unswitch.c
index dd6fd01..7de5fba 100644
--- a/gcc/tree-ssa-loop-unswitch.c
+++ b/gcc/tree-ssa-loop-unswitch.c
@@ -532,6 +532,12 @@ find_loop_guard (struct loop *loop)
guard_edge->src->index, guard_edge->dest->index);
return NULL;
}
+ if (guard_edge->dest == loop->latch)
+ {
+ if (dump_file && (dump_flags & TDF_DETAILS))
+ fprintf(dump_file,"Guard edge destination is loop latch!\n");
+ return NULL;
+ }
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file,
Is it OK for you?
>From gcc-bugs-return-524204-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 16:20:29 2016
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Subject: =?UTF-8?B?W0J1ZyBmb3J0cmFuLzcwOTM3XSBbNyBSZWdyZXNzaW9uXSBJQ0U6IHRyZWUg?= =?UTF-8?B?Y29kZSDigJhzc2FfbmFtZeKAmSBpcyBub3Qgc3VwcG9ydGVkIGluIExUTyBz?= =?UTF-8?B?dHJlYW1z?Date: Wed, 04 May 2016 16:20:00 -0000
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The ICEs are gone with the patch
--- ../_clean/gcc/fortran/trans-decl.c 2016-03-28 13:03:29.000000000 +0200
+++ ../p_work/gcc/fortran/trans-decl.c 2016-05-04 16:13:21.000000000 +0200
@@ -6013,6 +6013,29 @@ finish_oacc_declare (gfc_namespace *ns,
}
+static stmtblock_t *place_decl_expr_init;
+static void
+place_decl_expr (gfc_symbol *sym)
+{
+ if (sym->backend_decl)
+ {
+ tree type = sym->backend_decl;
+ if (DECL_P (sym->backend_decl))
+ type = TREE_TYPE (type);
+ else
+ gcc_assert (TYPE_P (type));
+ while (POINTER_TYPE_P (type))
+ type = TREE_TYPE (type);
+ if (variably_modified_type_p (type, NULL))
+ {
+ if (TYPE_NAME (type))
+ gfc_add_expr_to_block (place_decl_expr_init,
+ build1 (DECL_EXPR, type, TYPE_NAME
(type)));
+ }
+ }
+}
+
+
/* Generate code for a function. */
void
@@ -6088,6 +6111,9 @@ gfc_generate_function_code (gfc_namespac
has_coarray_vars = false;
generate_local_vars (ns);
+ place_decl_expr_init = &init;
+ gfc_traverse_ns (ns, place_decl_expr);
+
if (flag_coarray == GFC_FCOARRAY_LIB && has_coarray_vars)
generate_coarray_init (ns);
However, I see several execution failures:
FAIL: gfortran.dg/array_constructor_type_7.f03 -Oxx execution test where xx
depends on -m32/-m64
FAIL: gfortran.dg/auto_char_dummy_array_1.f90 -O* execution test
FAIL: gfortran.dg/namelist_70.f90 -O* execution test
FAIL: gfortran.dg/string_ctor_1.f90 -Oxx execution test where xx depends on
-m32/-m64
FAIL: libgomp.fortran/task2.f90 -O execution test
FAIL: libgomp.fortran/vla*.f90 -O* execution test
>From gcc-bugs-return-524205-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 16:22:45 2016
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Subject: [Bug c/66773] sign-compare warning for == and != are pretty useless
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Eric Gallager <egall at gwmail dot gwu.edu> changed:
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--- Comment #6 from Eric Gallager <egall at gwmail dot gwu.edu> ---
(In reply to Andreas Schwab from comment #5)
> A cast is seldom a good solution
Well, that's the sort of solution this warning causes inexperienced programmers
who don't know any better (such as myself) to use... Maybe now that GCC has
fixits, it could suggest something better?
>From gcc-bugs-return-524206-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 16:28:10 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70951] New: misleading -Wignored-qualifiers text, incorrect documentation
Date: Wed, 04 May 2016 16:28:00 -0000
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Bug ID: 70951
Summary: misleading -Wignored-qualifiers text, incorrect
documentation
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The following C/C++ program elicits warnings in either language mode. The
warning is expected, but the phrasing of the text isn't entirely correct
because, as the program shows, qualifiers on function return types can be
deduced in both languages and so are not ignored. I think this can be easily
corrected by tweaking the text of the warning to avoid giving the impression
that the qualifiers are not part of the type.
In addition, the documentation for the option states:
Warn if the return type of a function has a type qualifier such as const. For
ISO C such a type qualifier has no effect, since the value returned by a
function is not an lvalue. For C++, the warning is only emitted for scalar
types or void.
I noticed two problems with the documentation:
First, as the C example program shows, a type qualifier on a function return
type does have an effect even in C. The description should be expanded to make
it clear that the qualifier has no effect on the returned value but that it
does affect the type of the function.
Second, as the C++ example shows, G++ emits the warning also for enumerations
in addition to scalar types. Either the C++ description should be corrected to
mention that the warning is issued for enumerations as well, or the
implementation fixed to match the documentation.
$ (set -x; cat xx.c && gcc -Wall -Wextra -xc xx.c && gcc -Wall -Wextra -xc++
xx.c)
+ cat xx.c
enum E { e };
typedef const enum E T;
T foo (void) { return (T)0; }
#if __cplusplus
template <class T>
void f (T);
int main () { f (foo); }
#else
typedef T (*tf)(void);
typedef enum E (*ef)(void);
_Static_assert (1 == _Generic (foo, tf: 1, ef: 0), "");
#endif
+ gcc -S -Wall -Wextra -xc xx.c
xx.c:4:3: warning: type qualifiers ignored on function return type
[-Wignored-qualifiers]
T foo (void) { return (T)0; }
^~~
xx.c:15:13: warning: type qualifiers ignored on function return type
[-Wignored-qualifiers]
typedef T (*tf)(void);
^~
+ gcc -Wall -Wextra -xc++ xx.c
xx.c:4:12: warning: type qualifiers ignored on function return type
[-Wignored-qualifiers]
T foo (void) { return (T)0; }
^
/tmp/cccrycoh.o: In function `main':
xx.c:(.text+0x15): undefined reference to `void f<E const (*)()>(E const
(*)())'
collect2: error: ld returned 1 exit status
>From gcc-bugs-return-524207-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 16:28:31 2016
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From: "egall at gwmail dot gwu.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/38470] value range propagation (VRP) would improve -Wsign-compare
Date: Wed, 04 May 2016 16:28:00 -0000
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Eric Gallager <egall at gwmail dot gwu.edu> changed:
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--- Comment #15 from Eric Gallager <egall at gwmail dot gwu.edu> ---
(In reply to Manuel López-Ibáñez from comment #6)
> Fixing this is even more unlikely than fixing PR 23608, since the latter
> only asks for constant propagation, but this one requires value range
> propagation.
That has since been closed as fixed. So are the chances of this one being fixed
next somewhat better now?
>From gcc-bugs-return-524208-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 16:32:54 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/70935] [6/7 Regression] ICE: verify_ssa failed (error: definition in block 9 does not dominate use in block 12) w/ -O3 -g
Date: Wed, 04 May 2016 16:32:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Yuri Rumyantsev from comment #3)
> Here is a simple fix - do not take into consideration edges destination of
> which is loop latch block, i.e. loop is endless:
> diff --git a/gcc/tree-ssa-loop-unswitch.c b/gcc/tree-ssa-loop-unswitch.c
> index dd6fd01..7de5fba 100644
> --- a/gcc/tree-ssa-loop-unswitch.c
> +++ b/gcc/tree-ssa-loop-unswitch.c
> @@ -532,6 +532,12 @@ find_loop_guard (struct loop *loop)
> guard_edge->src->index, guard_edge->dest->index);
> return NULL;
> }
> + if (guard_edge->dest == loop->latch)
> + {
> + if (dump_file && (dump_flags & TDF_DETAILS))
> + fprintf(dump_file,"Guard edge destination is loop latch!\n");
Formatting - missing space before (.
> + return NULL;
> + }
>
> if (dump_file && (dump_flags & TDF_DETAILS))
> fprintf (dump_file,
>
> Is it OK for you?
Richard knows this code much better than I do, so I'll defer to him.
That said, is there any guarantee that for non-endless loop we won't run into
the debug stmt issue? For normal non-debug uses of something set inside of the
loop there would need to be a PHI on the exit block if it is reachable from
outside of the loop too, the question is if it is possible even in the
non-endless case that the exit block will be only reachable from within the
loop. If yes, even normal SSA_NAME uses, not just in debug stmts, could be a
problem.
>From gcc-bugs-return-524209-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 16:40:30 2016
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From: "porton at narod dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/62042] Missing optimization of copying non-limited objects
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--- Comment #10 from Victor Porton <porton at narod dot ru> ---
Not fixed in GCC 6.1.1.
>From gcc-bugs-return-524210-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 16:41:44 2016
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Subject: [Bug ada/62235] segmentation fault on Ada 2012 code
Date: Wed, 04 May 2016 16:41:00 -0000
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--- Comment #8 from Victor Porton <porton at narod dot ru> ---
Note fixed in GCC 6.1.1.
>From gcc-bugs-return-524211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 16:42:51 2016
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Subject: [Bug ada/62236] <built-in>: error: aggregate value used where an integer was expected
Date: Wed, 04 May 2016 16:42:00 -0000
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--- Comment #7 from Victor Porton <porton at narod dot ru> ---
Not fixed in GCC 6.1.1.
>From gcc-bugs-return-524212-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 16:53:02 2016
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
Date: Wed, 04 May 2016 16:53:00 -0000
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--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This should fix it then:
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index d275f8e..d31e915 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -5532,7 +5532,7 @@ c_parser_if_statement (c_parser *parser, bool *if_p,
vec<tree> *chain)
/* Set IF_P to true to indicate that this if statement has an
else clause. This may trigger the Wparentheses warning
below when we get back up to the parent if statement. */
- if (if_p != NULL)
+ if (if_p != NULL && !from_macro_expansion_at (loc))
*if_p = true;
}
else
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index da2ee3c..f6b8008 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -10848,6 +10848,7 @@ cp_parser_selection_statement (cp_parser* parser, bool
*if_p,
{
tree statement;
tree condition;
+ location_t loc = cp_lexer_peek_token (parser->lexer)->location;
/* Look for the `('. */
if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
@@ -10941,7 +10942,7 @@ cp_parser_selection_statement (cp_parser* parser, bool
*if_p,
indicate that this if statement has an else clause.
This may trigger the Wparentheses warning below
when we get back up to the parent if statement. */
- if (if_p != NULL)
+ if (if_p != NULL && !from_macro_expansion_at (loc))
*if_p = true;
}
else
>From gcc-bugs-return-524213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 16:57:31 2016
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70952] New: Missing warning for likely-erroneous octal escapes in string literals
Date: Wed, 04 May 2016 16:57:00 -0000
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Bug ID: 70952
Summary: Missing warning for likely-erroneous octal escapes in
string literals
Product: gcc
Version: 6.0
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Priority: P3
Component: c
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GCC doesn't warn for:
const char s[] = "\008";
(just the two zeros following the backslash become a part of the octal literal,
so the string literal is equivalent to "\0""8")
\008 and \009 in string literals are most likely errors (\08 and \09 work just
as well if a nil character followed by a digit was really intended)
I think a bit of a bikeshed is possible on the point how far we want to take it
(do we warn for "\08"? for "\799"?). I think warning when the octal escape
with less than 3 digits is followed by [89] is desirable (this catches all of
the above), but warning when octal escape already has 3 digits may be not (this
exempts "\0009" from the warning).
>From gcc-bugs-return-524214-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 17:12:18 2016
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Subject: [Bug fortran/70953] New: Reallocation on assignment does not work with debug flags
Date: Wed, 04 May 2016 17:12:00 -0000
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Bug ID: 70953
Summary: Reallocation on assignment does not work with debug
flags
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The attached code produces a runtime error when compiled with some
debug flags (see later). The code however is correct: the dimension
mismatch reported by the compiler is not an error but should trigger
the allocation of the rhs.
program p
implicit none
integer, allocatable :: v(:), x(:)
allocate( x(3) )
v = int( x ) ! runtime error
!v = x ! works correctly
write(*,*) shape(v)
end program p
$ gfortran gf.f90 -g -O0 -fcheck=all -ffpe-trap=invalid -o gf
$ ./gf
At line 7 of file gf.f90
Fortran runtime error: Array bound mismatch for dimension 1 of array 'v'
(7233114627794677618/3)
$ gfortran --version
GNU Fortran (GCC) 7.0.0 20160422 (experimental)
Removing either -fcheck=all or -ffe-trap=invalid solves the problem.
>From gcc-bugs-return-524215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 17:19:22 2016
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Subject: [Bug fortran/70953] Reallocation on assignment does not work with debug flags
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Last reconfirmed| |2016-05-04
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
It looks like a duplicate of pr52162 (see comment 2).
>From gcc-bugs-return-524216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 17:26:55 2016
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Subject: [Bug c++/70932] flexible array member with non-trivial destructor
Date: Wed, 04 May 2016 17:26:00 -0000
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--- Comment #2 from Jens Maurer <jens.maurer at gmx dot net> ---
The whole point of flexible array members seems to be to save an allocation for
the array, with the precondition that the array size can be determined at
initialization time and stays fixed for the entire lifetime of the enclosing
struct. In that scenario, I need to placement-new the array elements (or,
probably, the entire array) anyway, so requiring to explicitly call the
destructor(s) seems a natural duality.
In the example
S s = { 3, { 1, 2, 3 } };
it seems surprising that the destructor for the elements is not called, given
that the number of elements is "right there" in the source code. [Yes, I have
an idea about the implementation difficulties here.] I'd rather prefer this
initialization example to be ill-formed, if the element type has a non-trivial
destructor. Consider if the element type is a std::string (with dynamic
allocation) and this is inside a loop; this seems to cause a serious memory
leak.
>From gcc-bugs-return-524217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 17:27:37 2016
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70952] Missing warning for likely-erroneous octal escapes in string literals
Date: Wed, 04 May 2016 17:27:00 -0000
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--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Octal escapes have no more than three digits by definition, so "\0009" clearly
doesn't fall under this warning.
Upon further testing, there's no diagnostic for
const char c = '\9'; /* same as ... = 9; */
Surely that's a bug? It is diagnosed (with a warning) inside of string
literals.
>From gcc-bugs-return-524218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 17:32:30 2016
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Subject: [Bug c/70954] New: -Wmisleading-indentation false positive on GNU "ed"
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70954
Bug ID: 70954
Summary: -Wmisleading-indentation false positive on GNU "ed"
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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A user reported a false positive with -Wmisleading-indentation when
compiling "ed" with gcc 6.1:
https://gcc.gnu.org/ml/gcc/2016-05/msg00044.html
Minimal reproducer:
void test (const char ** const ibufpp)
{
int c = *(*ibufpp)++;
switch (c)
{
case '#': while( *(*ibufpp)++ != '\n' ) ;
break;
}
}
$ ./xgcc -B. -c test.c -Wall
test.c: In function ‘test’:
test.c:6:15: warning: this ‘while’ clause does not guard...
[-Wmisleading-indentation]
case '#': while( *(*ibufpp)++ != '\n' ) ;
^~~~~
test.c:7:15: note: ...this statement, but the latter is misleadingly indented
as if it is guarded by the ‘while’
break;
^~~~~
I agree that this is a false positive.
With trunk r235889 (and presumably the gcc-6-branch), we currently exit from
should_warn_for_misleading_indentation
here:
495 /* Otherwise, they are visually aligned: issue a warning. */
496 return true;
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Subject: [Bug c/70952] Missing warning for likely-erroneous octal escapes in string literals
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--- Comment #2 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Bah, please disregard the last point; '\9' is diagnosed similar to "\9".
>From gcc-bugs-return-524220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 18:05:29 2016
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From: "zenith432 at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70955] New: regression in code generation for __builtin_ms_va_list in GCC 6.1
Date: Wed, 04 May 2016 18:05:00 -0000
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Bug ID: 70955
Summary: regression in code generation for __builtin_ms_va_list
in GCC 6.1
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I've tried on GCC 6.1.0 built for OS X, and GCC 6.1.1 on Fedora 23 supplied by
their rawhide. Same behavior.
- variadic function with x86-64 ms_abi calling convention.
- defines local variable of type __builtin_ms_va_list.
- iterates with __builtin_va_arg (note: there is no corresponding
__builtin_ms_va_arg).
- __builtin_va_arg treats the __builtin_ms_va_list variable as a sysv va_list,
and goes berserk.
I've anaylzed this by looking at the code generated.
Same wrong code generated if __builtin_va_list is used inside an ms_abi
function instead of __builtin_ms_va_list.
This functionality worked on both GCC 5.3 and GCC 4.9, so this is a regression.
I've compared the resulting code generated to GCC 5.3. The code generated on
GCC 5.3 is good.
As mentioned above, there is no __builtin_ms_va_arg, and never was. The
function __builtin_va_arg has previously been used to iterate on all types of
__builtin_*_va_list.
>From gcc-bugs-return-524221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 18:12:31 2016
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think we should still warn.
The patch will shut up the warning even when the whole dangling else is inside
of some macro, or when it spans multiple macros etc.
>From gcc-bugs-return-524222-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 18:23:10 2016
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
Date: Wed, 04 May 2016 18:23:00 -0000
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--- Comment #8 from Pedro Alves <palves at redhat dot com> ---
- There's exactly the same number of ifs and elses in the macro.
- The indentation of the else matches that of the if.
- There's actually no "else" at all at the macro call site, making the warning
look odd.
So, IMO, we want to warn about this:
#define ALL_OBJFILE_OSECTIONS(objfile, osect) \
for (osect = sections; osect < sections_end; osect++) \
if (osect->the_bfd_section != 0) \
and this:
#define ALL_OBJFILE_OSECTIONS(objfile, osect) \
for (osect = sections; osect < sections_end; osect++) \
if (osect->the_bfd_section != 0) \
if (whatever != 0) \
Because this would do the wrong thing:
if (condition)
ALL_OBJFILE_OSECTIONS (o, osect)
else
return 0;
But not this:
#define ALL_OBJFILE_OSECTIONS(objfile, osect) \
for (osect = sections; osect < sections_end; osect++) \
if (osect->the_bfd_section != 0) \
{ \
/* Nothing. */ \
} \
else
>From gcc-bugs-return-524223-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 18:29:50 2016
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
If you want your macro to be immune from this, can't you do something like:
static inline struct obj_section *
whatever (struct obj_section *osect, struct obj_section *sections_end)
{
while (osect < sections_end && osect->the_bfd_section != 0)
osect++;
return osect;
}
and define:
#define ALL_OBJFILE_OSECTIONS(objfile, osect) \
for (osect = sections; whatever (osect, sections_end) < sections_end;
osect++)
(or use ({ }) directly in the condition if you rely on GNU extensions)?
>From gcc-bugs-return-524224-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 18:34:18 2016
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
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--- Comment #10 from Pedro Alves <palves at redhat dot com> ---
Sure can. But the point is discussing what makes sense for the warning.
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #11 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Pedro Alves from comment #8)
> Because this would do the wrong thing:
>
> if (condition)
> ALL_OBJFILE_OSECTIONS (o, osect)
> else
> return 0;
>
>
> But not this:
>
> #define ALL_OBJFILE_OSECTIONS(objfile, osect) \
> for (osect = sections; osect < sections_end; osect++) \
> if (osect->the_bfd_section != 0) \
> { \
> /* Nothing. */ \
> } \
> else
??? That would expand to
}
else
else
return 0;
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
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--- Comment #13 from Pedro Alves <palves at redhat dot com> ---
Should have been:
if (condition)
ALL_OBJFILE_OSECTIONS (o, osect)
{
/* do something with each o / osect */
}
else
return 0;
So if the ALL_OBJFILE_OSECTIONS macro contains an imbalanced if/else then the
"else" above binds to the wrong "if". But not if the macro contains a balanced
if/else, such as in the original code.
>From gcc-bugs-return-524226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 18:41:04 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
Date: Wed, 04 May 2016 18:41:00 -0000
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The warning is about dangling else, which you have in the source.
if (cond)
for (...)
if (cond2)
...
else
and while the C/C++ grammar say they bind to the inner-most if, many people
actually mistake this. Put all of the above into a macro and with Marek's
patch you won't get desirable warning. Now, you say that if the outer if is
not from a macro or outer macro and the inner else is together with the inner
if from the same macro, we shouldn't warn? That sounds quite complicated set
of rules. What if the outer if, inner if and else each comes from a different
macro?
Note, clang and clang++ warn on this as well.
>From gcc-bugs-return-524228-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 18:45:40 2016
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Subject: [Bug target/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Wed, 04 May 2016 18:45:00 -0000
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--- Comment #25 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to H.J. Lu from comment #23)
> We need to move those special SSE SF->DF splitters before
No, this splitter will fail if the transformation doesn't result in a constant.
So, we actually want this splitter first, to try to transform a memory load to
a constant load, and moving others before this one would be harmful.
> (define_split
> [(set (match_operand 0 "any_fp_register_operand")
> (float_extend (match_operand 1 "memory_operand")))]
> "reload_completed
> && (GET_MODE (operands[0]) == TFmode
> || GET_MODE (operands[0]) == XFmode
> || GET_MODE (operands[0]) == DFmode)"
> [(set (match_dup 0) (match_dup 2))]
> {
> operands[2] = find_constant_src (curr_insn);
>
> if (operands[2] == NULL_RTX
> || (SSE_REGNO_P (REGNO (operands[0]))
> && standard_sse_constant_p (operands[2],
> GET_MODE (operands[0])) != 1)
> || (STACK_REGNO_P (REGNO (operands[0]))
> && standard_80387_constant_p (operands[2]) < 1))
> FAIL;
> })
>From gcc-bugs-return-524229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 18:46:30 2016
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
Date: Wed, 04 May 2016 18:46:00 -0000
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--- Comment #14 from Pedro Alves <palves at redhat dot com> ---
(In reply to Jakub Jelinek from comment #12)
> The warning is about dangling else, which you have in the source.
> if (cond)
> for (...)
> if (cond2)
> ...
> else
> and while the C/C++ grammar say they bind to the inner-most if, many people
> actually mistake this.
At the risk of getting a bit off topic, or maybe generalizing in a different
direction, IMO this should be tied to the new misleading indentation tracking.
What people actually mistake is this:
if (cond)
for (...)
if (cond2)
...
else
...
While I seriously doubt anyone mistakes your example quoted above as the else
binding to the outer if.
>From gcc-bugs-return-524230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 18:55:04 2016
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
Date: Wed, 04 May 2016 18:55:00 -0000
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--- Comment #15 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Indeed, we also warn for
void bar(int x)
{
if (x)
for (int i = x; i < 5; i++)
if (i != 0)
{
/* Nothing. */
}
else
if(!x)
return;
}
Perhaps we should not warn if some other construct breaks the ambiguity (like
for, while, etc.). But I can see that one may wrongly write:
void bar(int x)
{
if (x)
MACRO_WITH_ELSE(x)
if(!x)
return;
}
and not be aware that the macro changes the meaning of the following 'if'. The
extra braces may seem redundant, but they avoid such pitfalls:
void bar(int x)
{
if (x)
{
MACRO_WITH_ELSE(x)
if(!x)
return;
}
}
>From gcc-bugs-return-524232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 18:59:39 2016
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Subject: [Bug tree-optimization/70956] New: ICE in build_cross_bb_scalars_def, at graphite-scop-detection.c:1725
Date: Wed, 04 May 2016 18:59:00 -0000
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Bug ID: 70956
Summary: ICE in build_cross_bb_scalars_def, at
graphite-scop-detection.c:1725
Product: gcc
Version: 7.0
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$ gcc src/gcc/testsuite/gcc.dg/tree-ssa/vrp66.c -fgraphite-identity -O2
src/gcc/testsuite/gcc.dg/tree-ssa/vrp66.c: In function ‘main’:
src/gcc/testsuite/gcc.dg/tree-ssa/vrp66.c:827:1: internal compiler error: in
build_cross_bb_scalars_def, at graphite-scop-detection.c:1725
main ()
^~~~
0x1d2e067 build_cross_bb_scalars_def
src/gcc/graphite-scop-detection.c:1725
0x1d2e3ee graphite_find_cross_bb_scalar_vars
src/gcc/graphite-scop-detection.c:1796
0x1d2e5a1 try_generate_gimple_bb
src/gcc/graphite-scop-detection.c:1832
0x1d2ea7f before_dom_children
src/gcc/graphite-scop-detection.c:1947
0x1ce6174 dom_walker::walk(basic_block_def*)
src/gcc/domwalk.c:265
0x1d2edb2 build_scops(vec<scop*, va_heap, vl_ptr>*)
src/gcc/graphite-scop-detection.c:2015
0x1d18996 graphite_transform_loops()
src/gcc/graphite.c:307
0x1d18ab5 graphite_transforms
src/gcc/graphite.c:356
0x1d18bd7 execute
src/gcc/graphite.c:433
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.
>From gcc-bugs-return-524231-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 18:59:03 2016
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
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--- Comment #16 from Pedro Alves <palves at redhat dot com> ---
(In reply to Manuel López-Ibáñez from comment #15)
> But I can see that one may wrongly write:
>
> void bar(int x)
> {
> if (x)
> MACRO_WITH_ELSE(x)
> if(!x)
> return;
> }
>
> and not be aware that the macro changes the meaning of the following 'if'.
This could also be sorted out with indentation level tracking -- the if binds
to the else in the macro, but it is not indented as one would expect if it was
meant to.
>From gcc-bugs-return-524233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 19:02:53 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70957] New: testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on power7
Date: Wed, 04 May 2016 19:02:00 -0000
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Bug ID: 70957
Summary: testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on
power7
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The dg comments force it to target power9 but does not limit to where it
compiles. power7 does not support some of the Alitivec stuff it generates and
so produces error messages.
/* { dg-do compile { target { powerpc64-*-* } } } */
/* { dg-skip-if "do not override mcpu" { powerpc*-*-* } { "-mcpu=*" } {
"-mcpu=power9" } } */
/* { dg-options "-mcpu=power9 -O0" } */
make -k check-gcc RUNTESTFLAGS="powerpc.exp=vsx-elemrev-*.c"
. . . in the log . . .
spawn -ignore SIGHUP /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -mcpu=power9 -O0 -S -o
vsx-elemrev-4.s
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo6':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:62:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo7':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-
4.c:67:3: error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo8':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:72:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo9':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:77:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo16':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:112:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo17':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:117:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo18':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:122:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo19':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:127:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo26':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:162:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo27':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:167:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo28':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:172:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo29':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:177:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo36':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:212:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo37':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:217:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo38':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:222:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo39':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:227:3:
error: invalid parameter combination for AltiVec intrinsic
compiler exited with status 1
output is:
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo6':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:62:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo7':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:67:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo8':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:72:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo9':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:77:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo16':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:112:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo17':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:117:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo18':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:122:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo19':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:127:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo26':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:162:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo27':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:167:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo28':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:172:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo29':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:177:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo36':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:212:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo37':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:217:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo38':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:222:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c: In
function 'foo39':
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:227:3:
error: invalid parameter combination for AltiVec intrinsic
FAIL: gcc.target/powerpc/vsx-elemrev-4.c (test for excess errors)
Excess errors:
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:62:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:67:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:72:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:77:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:112:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:117:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:122:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:127:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:162:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:167:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:172:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:177:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:212:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:217:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:222:3:
error: invalid parameter combination for AltiVec intrinsic
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.target/powerpc/vsx-elemrev-4.c:227:3:
error: invalid parameter combination for AltiVec intrinsic
gcc.target/powerpc/vsx-elemrev-4.c: output file does not exist
UNRESOLVED: gcc.target/powerpc/vsx-elemrev-4.c scan-assembler-times lxvx 40
gcc.target/powerpc/vsx-elemrev-4.c: output file does not exist
UNRESOLVED: gcc.target/powerpc/vsx-elemrev-4.c scan-assembler-times stxvx 40
>From gcc-bugs-return-524234-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 19:08:53 2016
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Subject: =?UTF-8?B?W0J1ZyBmb3J0cmFuLzcwOTM3XSBbNyBSZWdyZXNzaW9uXSBJQ0U6IHRyZWUg?= =?UTF-8?B?Y29kZSDigJhzc2FfbmFtZeKAmSBpcyBub3Qgc3VwcG9ydGVkIGluIExUTyBz?= =?UTF-8?B?dHJlYW1z?Date: Wed, 04 May 2016 19:08:00 -0000
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--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On May 4, 2016 6:20:14 PM GMT+02:00, "dominiq at lps dot ens.fr"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70937
>
>--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr>
>---
>The ICEs are gone with the patch
>
>--- ../_clean/gcc/fortran/trans-decl.c 2016-03-28 13:03:29.000000000
>+0200
>+++ ../p_work/gcc/fortran/trans-decl.c 2016-05-04 16:13:21.000000000
>+0200
>@@ -6013,6 +6013,29 @@ finish_oacc_declare (gfc_namespace *ns,
> }
>
>
>+static stmtblock_t *place_decl_expr_init;
>+static void
>+place_decl_expr (gfc_symbol *sym)
>+{
>+ if (sym->backend_decl)
>+ {
>+ tree type = sym->backend_decl;
>+ if (DECL_P (sym->backend_decl))
>+ type = TREE_TYPE (type);
>+ else
>+ gcc_assert (TYPE_P (type));
>+ while (POINTER_TYPE_P (type))
>+ type = TREE_TYPE (type);
>+ if (variably_modified_type_p (type, NULL))
>+ {
>+ if (TYPE_NAME (type))
>+ gfc_add_expr_to_block (place_decl_expr_init,
>+ build1 (DECL_EXPR, type, TYPE_NAME
>(type)));
>+ }
>+ }
>+}
>+
>+
> /* Generate code for a function. */
>
> void
>@@ -6088,6 +6111,9 @@ gfc_generate_function_code (gfc_namespac
> has_coarray_vars = false;
> generate_local_vars (ns);
>
>+ place_decl_expr_init = &init;
>+ gfc_traverse_ns (ns, place_decl_expr);
>+
> if (flag_coarray == GFC_FCOARRAY_LIB && has_coarray_vars)
> generate_coarray_init (ns);
>
>
>However, I see several execution failures:
>
>FAIL: gfortran.dg/array_constructor_type_7.f03 -Oxx execution test
>where xx
>depends on -m32/-m64
>FAIL: gfortran.dg/auto_char_dummy_array_1.f90 -O* execution test
>FAIL: gfortran.dg/namelist_70.f90 -O* execution test
>FAIL: gfortran.dg/string_ctor_1.f90 -Oxx execution test where xx
>depends on
>-m32/-m64
>
>FAIL: libgomp.fortran/task2.f90 -O execution test
>FAIL: libgomp.fortran/vla*.f90 -O* execution test
As said FORTRAN people need to help here. The DECL_EXPRs need to be placed
where the variables go into scope.
I'll see how far as I can get here on Friday but somebody more knowledgeable of
the frontend might be faster.
>From gcc-bugs-return-524235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 19:17:15 2016
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Subject: [Bug target/70957] testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on power7
Date: Wed, 04 May 2016 19:17:00 -0000
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |wschmidt at gcc dot gnu.org
--- Comment #1 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Mine to investigate.
>From gcc-bugs-return-524236-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 19:42:51 2016
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Subject: [Bug c++/70922] -Wparentheses warning should not complain about if-else from macro expansion
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--- Comment #17 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Pedro Alves from comment #16)
>
> This could also be sorted out with indentation level tracking -- the if
> binds to the else in the macro, but it is not indented as one would expect
> if it was meant to.
What should the indentation track? The start of the macro? Or should it look
within the macro?
I can imagine that if the 'else' is within a macro, and we are going to warn,
then only warn if the column of the 'if' is <= the column of the macro
expansion point. In principle, this should not trigger any new false positives,
since we only restrict the warning. But who knows, real code is sometimes
weird.
>From gcc-bugs-return-524237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 20:01:02 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Wed, 04 May 2016 20:01:00 -0000
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--- Comment #26 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Uroš Bizjak from comment #25)
> (In reply to H.J. Lu from comment #23)
>
> > We need to move those special SSE SF->DF splitters before
>
> No, this splitter will fail if the transformation doesn't result in a
> constant. So, we actually want this splitter first, to try to transform a
> memory load to a constant load, and moving others before this one would be
> harmful.
>
> > (define_split
> > [(set (match_operand 0 "any_fp_register_operand")
> > (float_extend (match_operand 1 "memory_operand")))]
> > "reload_completed
> > && (GET_MODE (operands[0]) == TFmode
> > || GET_MODE (operands[0]) == XFmode
> > || GET_MODE (operands[0]) == DFmode)"
> > [(set (match_dup 0) (match_dup 2))]
> > {
> > operands[2] = find_constant_src (curr_insn);
> >
> > if (operands[2] == NULL_RTX
> > || (SSE_REGNO_P (REGNO (operands[0]))
> > && standard_sse_constant_p (operands[2],
> > GET_MODE (operands[0])) != 1)
> > || (STACK_REGNO_P (REGNO (operands[0]))
> > && standard_80387_constant_p (operands[2]) < 1))
> > FAIL;
> > })
But when this splitter fails, no other splitters will be tried.
>From gcc-bugs-return-524238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 20:11:36 2016
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Wed, 04 May 2016 20:11:00 -0000
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--- Comment #27 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to H.J. Lu from comment #26)
> But when this splitter fails, no other splitters will be tried.
Bah. This is clearly an implementation bug in the split pass. I don't think we
have to work around it, the infrastructure bug should be fixed instead. Can you
please open a new bug about it?
I propose to go ahead and commit my patch, which is already accumulating
several semi-related fixes and improvements. The patch will probably expose an
optimization problem in the splitting pass, so we will have a testcase to
illustrate the problem.
>From gcc-bugs-return-524239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 20:45:42 2016
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Subject: [Bug c++/70933] [7.0 regression] ICE with -Wall on valid code in inchash::add_expr
Date: Wed, 04 May 2016 20:45:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed May 4 20:44:40 2016
New Revision: 235902
URL: https://gcc.gnu.org/viewcvs?rev=235902&root=gcc&view=rev
Log:
PR c++/70906
PR c++/70933
* tree-core.h (enum operand_equal_flag): Add OEP_HASH_CHECK.
* tree.c (inchash::add_expr): If !IS_EXPR_CODE_CLASS (tclass),
assert flags & OEP_HASH_CHECK, instead of asserting it
never happens. Handle TARGET_EXPR.
* fold-const.c (operand_equal_p): For hash verification,
or in OEP_HASH_CHECK into flags.
* g++.dg/opt/pr70906.C: New test.
* g++.dg/opt/pr70933.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr70906.C
trunk/gcc/testsuite/g++.dg/opt/pr70933.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-core.h
trunk/gcc/tree.c
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Subject: [Bug c++/70906] [7 Regression] ice in add_expr, at tree.c:7925
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed May 4 20:44:40 2016
New Revision: 235902
URL: https://gcc.gnu.org/viewcvs?rev=235902&root=gcc&view=rev
Log:
PR c++/70906
PR c++/70933
* tree-core.h (enum operand_equal_flag): Add OEP_HASH_CHECK.
* tree.c (inchash::add_expr): If !IS_EXPR_CODE_CLASS (tclass),
assert flags & OEP_HASH_CHECK, instead of asserting it
never happens. Handle TARGET_EXPR.
* fold-const.c (operand_equal_p): For hash verification,
or in OEP_HASH_CHECK into flags.
* g++.dg/opt/pr70906.C: New test.
* g++.dg/opt/pr70933.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/opt/pr70906.C
trunk/gcc/testsuite/g++.dg/opt/pr70933.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-core.h
trunk/gcc/tree.c
>From gcc-bugs-return-524242-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 20:47:56 2016
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Subject: [Bug c++/70906] [7 Regression] ice in add_expr, at tree.c:7925
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-524241-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 20:47:35 2016
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Subject: [Bug c++/70933] [7 regression] ICE with -Wall on valid code in inchash::add_expr
Date: Wed, 04 May 2016 20:47:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
Resolution|DUPLICATE |FIXED
Summary|[7.0 regression] ICE with |[7 regression] ICE with
|-Wall on valid code in |-Wall on valid code in
|inchash::add_expr |inchash::add_expr
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Not really duplicate. But fixed by the same commit.
>From gcc-bugs-return-524243-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 20:48:43 2016
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From: "j.v.dijk at tue dot nl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/16106] Poor error message
Date: Wed, 04 May 2016 20:48:00 -0000
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Jan van Dijk <j.v.dijk at tue dot nl> changed:
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----------------------------------------------------------------------------
CC| |j.v.dijk at tue dot nl
--- Comment #2 from Jan van Dijk <j.v.dijk at tue dot nl> ---
It appears this has been fixed long time ago already: both
g++ (SUSE Linux) 4.8.3 20140627 [gcc-4_8-branch revision 212064]
g++ (GCC) 7.0.0 20160504 (experimental)
print the desired error message:
16106.cpp: In constructor ‘A<T>::A(T&) [with T = int]’:
16106.cpp:8:12: error: invalid initialization of non-const reference of type
‘int&’ from an rvalue of type ‘int’
A<int> a;
^
16106.cpp: In function ‘int main()’:
16106.cpp:8:12: error: invalid initialization of non-const reference of type
‘int&’ from an rvalue of type ‘int’
16106.cpp:3:9: note: in passing argument 1 of ‘A<T>::A(T&) [with T = int]’
A(T& t = T()) : tt(t) {}
>From gcc-bugs-return-524244-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 20:56:17 2016
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Subject: [Bug c/38470] value range propagation (VRP) would improve -Wsign-compare
Date: Wed, 04 May 2016 20:56:00 -0000
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--- Comment #16 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #15)
> That has since been closed as fixed. So are the chances of this one being
> fixed next somewhat better now?
Not really. PR23608 fixes the case where the variable is actually a "const" by
assuming the initial value cannot be changed. There is no propagation of
values; we still warn for "i = 5; i < 5u;"
To fix the general case, someone has to implement some kind of reduced dataflow
within the FE. Something that once you see "x >= 0", records this info
somewhere, keeps track of any subsequent jumps, then when it sees "x <
Unsigned", it tries to see if "x >= 0" was recorded and there is a
(unconditional?) path from there to here. Doing this seems to me to require a
non-trivial amount of work.
The simplest case (x >= 0 && x < Unsigned) could perhaps be handled by some
special (folding?) function that when seeing such expression, sets
TREE_NO_WARNING for x, or converts the right-hand to (unsigned)x< Unsigned, or
something clever that I cannot even imagine.
If someone is interested in trying the above, look at warn_logical_operator in
c-common.c, which is one of those warnings that looks at logical && expressions
and tries to figure out whether to warn. You would need to create a similar
function (and call it from wherever warn_logical_operator is called from), but
you may need to rewrite the expressions or set TREE_NO_WARNING or do something
else to avoid warning later. This seems much less work, but still far from
trivial and it will only catch this very specific case.
>From gcc-bugs-return-524245-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 21:14:01 2016
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Subject: [Bug target/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Wed, 04 May 2016 21:14:00 -0000
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--- Comment #28 from uros at gcc dot gnu.org ---
Author: uros
Date: Wed May 4 21:13:13 2016
New Revision: 235906
URL: https://gcc.gnu.org/viewcvs?rev=235906&root=gcc&view=rev
Log:
PR target/70873
* config/i386/i386.md
(TARGET_SSE_PARTIAL_REG_DEPENDENCY float_extend sf->df peephole2):
Change to post-epilogue_completed late splitter. Use sse_reg_operand
as operand 0 predicate.
(TARGET_SSE_PARTIAL_REG_DEPENDENCY float_truncate df->sf peephole2):
Ditto.
(TARGET_SSE_PARTIAL_REG_DEPENDENCY float {si,di}->{sf,df} peephole2):
Ditto. Emit the pattern using RTX.
(TARGET_USE_VECTOR_FP_CONVERTS float_extend sf->df splitter):
Use sse_reg_opreand as operand 0 predicate. Do not use true_regnum in
the post-reload splitter. Use lowpart_subreg instead of gen_rtx_REG.
(TARGET_USE_VECTOR_FP_CONVERTS float_truncate df->sf splitter):
Ditto.
(TARGET_USE_VECTOR_CONVERTS float si->{sf,df} splitter): Use
sse_reg_operand as operand 0 predicate.
(TARGET_SPLIT_MEM_OPND_FOR_FP_CONVERTS float_extend sf->df peephole2):
Use sse_reg_opreand as operand 0 predicate. Use lowpart_subreg
instead of gen_rtx_REG.
(TARGET_SPLIT_MEM_OPND_FOR_FP_CONVERTS float_truncate sf->df
peephole2):
Ditto.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
>From gcc-bugs-return-524246-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 22:00:25 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70958] New: Flag -Wreturn-type does not warn about lacking return statement in main
Date: Wed, 04 May 2016 22:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70958
Bug ID: 70958
Summary: Flag -Wreturn-type does not warn about lacking return
statement in main
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: carlos.maziero at gmail dot com
Target Milestone: ---
The GCC version provided with Ubuntu 16.04 (5.3.1 20160413) does not warn when
the main function lacks a return statement, when using -Wreturn-type or -Wall.
A minimum working example follows:
Code (mwe.c):
int main ()
{
int i = 1 ;
}
In GCC 5.3.1:
$ gcc mwe.c -Wreturn-type
$
In GCC 4.8.4 (Ubuntu 14.04):
$ gcc mwe.c -Wreturn-type
mwe.c: In function ‘main’:
mwe.c:4:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
$
The value returned by main is important in UNIX programs, as it is frequently
used as a return status for scripts.
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Subject: [Bug c++/68722] [4.9/5 Regression] internal compiler error: in merge_exception_specifiers, at cp/typeck2.c:2108
Date: Wed, 04 May 2016 22:15:00 -0000
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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|4.9.4 |6.0
--- Comment #6 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Not going to backport the fix to gcc-4_9-branch and gcc-5-branch.
>From gcc-bugs-return-524248-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 22:27:17 2016
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Subject: [Bug c/70958] Flag -Wreturn-type does not warn about lacking return statement in main
Date: Wed, 04 May 2016 22:27:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |msebor at gcc dot gnu.org
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--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
The reason GCC 4.8 issues the warning is because it targets C89 by default, and
C89 doesn't say that falling off the end of main is allowed. The reason why
GCC 5.3 doesn't issue the same warning is because it targets C11 by default,
and C11 says that main that ends without explicitly returning a value as good
as one that did. You can revert to the prior behavior with 5.3 by using the
-std=c89 option.
While I believe GCC behaves correctly, I think the manual could stand to be
clarified to explain this subtle nuance (similarly to how it explains it for
C++).
>From gcc-bugs-return-524249-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 04 22:41:02 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/70958] Flag -Wreturn-type does not warn about lacking return statement in main
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--- Comment #2 from Carlos Maziero <carlos.maziero at gmail dot com> ---
I understand you explanation and agree with it, but I still have some concerns.
For instance, when using the -std=c89 flag, GCC 5.3.1 complains about the '//'
comments, which are not allowed in C89 standard. Thus, which flags should I use
to match as close as possible the 4.8 behavior in 5.3?
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Subject: [Bug c/70958] Flag -Wreturn-type does not warn about lacking return statement in main
Date: Wed, 04 May 2016 22:43:00 -0000
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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
-std=gnu90 or -std=gnu89 (depending on the naming you like :) ).
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70951] misleading -Wignored-qualifiers text, incorrect documentation
Date: Wed, 04 May 2016 22:57:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Wed, 4 May 2016, msebor at gcc dot gnu.org wrote:
> First, as the C example program shows, a type qualifier on a function return
> type does have an effect even in C. The description should be expanded to make
> it clear that the qualifier has no effect on the returned value but that it
> does affect the type of the function.
It's not clear to me how useful that detail is to mention. And if DR#423
gets closed with the TC proposed at
<http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1986.htm#dr_423> then it
will no longer affect the type of the function (though I think that defect
resolution is one it would be prudent to apply only in C11 mode, not for
older standards versions).
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Subject: [Bug c++/69855] Missing diagnostic for overload that only differs by return type
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Ville Voutilainen <ville.voutilainen at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |ville.voutilainen at gmail dot com
--- Comment #4 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Patch available: https://gcc.gnu.org/ml/gcc-patches/2016-05/msg00364.html
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Subject: [Bug c/70958] Flag -Wreturn-type does not warn about lacking return statement in main
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Carlos Maziero <carlos.maziero at gmail dot com> changed:
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----------------------------------------------------------------------------
Severity|minor |trivial
>From gcc-bugs-return-524254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 00:08:17 2016
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From: "amodra at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/68662] [6 regression] FAIL: gcc.dg/lto/20090210 c_lto_20090210_0.o-c_lto_20090210_1.o link, -O2 -flto -flto-partition=none -fuse-linker-plugin -fno-fat-lto-objects
Date: Thu, 05 May 2016 00:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68662
--- Comment #15 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Thu May 5 00:07:27 2016
New Revision: 235914
URL: https://gcc.gnu.org/viewcvs?rev=235914&root=gcc&view=rev
Log:
[RS6000] TARGET_RELOCATABLE
For ABI_V4, -mrelocatable and -fPIC both generate position independent
code, with some extra "fixup" output for -mrelocatable. The
similarity of these two options has led to the situation where the
sysv4.h SUBTARGET_OVERRIDE_OPTIONS sets flag_pic on seeing
-mrelocatable, and sets TARGET_RELOCATABLE on seeing -fPIC. That
prevents LTO from properly optimizing position dependent executables,
because the mutual dependence of the flags and the fact that LTO
streaming records the state of rs6000_isa_flags, result in flag_pic
being set when it shouldn't be.
So, don't set TARGET_RELOCATABLE when -fPIC. Places that currently
test TARGET_RELOCATABLE can instead test
TARGET_RELOCATABLE || (DEFAULT_ABI == ABI_V4 && flag_pic > 1)
or since TARGET_RELOCATABLE can only be enabled when ABI_V4,
DEFAULT_ABI == ABI_V4 && (TARGET_RELOCATABLE || flag_pic > 1).
Also, since flag_pic is set by -mrelocatable, a number of places that
currently test TARGET_RELOCATABLE can be simplified. I also made
-mrelocatable set TARGET_NO_FP_IN_TOC, allowing TARGET_RELOCATABLE to
be removed from ASM_OUTPUT_SPECIAL_POOL_ENTRY_P. Reducing occurrences
of TARGET_RELOCATABLE is a good thing.
PR target/68662
* config/rs6000/sysv4.h (SUBTARGET_OVERRIDE_OPTIONS): Don't
set OPTION_MASK_RELOCATABLE when flag_pic == 2. Set
TARGET_NO_FP_IN_TOC for -mrelocatable.
(MINIMAL_TOC_SECTION_ASM_OP): Remove redundant
TARGET_RELOCATABLE test.
(ASM_OUTPUT_SPECIAL_POOL_ENTRY_P): Likewise.
(ASM_PREFERRED_EH_DATA_FORMAT): Likewise.
* config/rs6000/linux64.h (MINIMAL_TOC_SECTION_ASM_OP): Likewise.
(ASM_OUTPUT_SPECIAL_POOL_ENTRY_P): Likewise.
(ASM_PREFERRED_EH_DATA_FORMAT): Likewise.
* config/rs6000/freebsd64.h (MINIMAL_TOC_SECTION_ASM_OP): Likewise.
(ASM_OUTPUT_SPECIAL_POOL_ENTRY_P): Likewise.
(ASM_PREFERRED_EH_DATA_FORMAT): Likewise.
* config/rs6000/predicates.md (easy_fp_constant): Likewise.
* config/rs6000/rs6000.c (rs6000_elf_output_toc_section_asm_op):
Likewise.
(rs6000_assemble_integer): Update TARGET_RELOCATABLE test.
(rs6000_stack_info): Likewise.
(rs6000_elf_asm_out_constructor): Likewise.
(rs6000_elf_asm_out_destructor): Likewise.
(rs6000_elf_declare_function_name): Likewise.
* config/rs6000/rs6000.md (load_toc_aix_di): Likewise.
* config/rs6000/rs6000.h (MASK_RELOCATABLE, MASK_MINIMAL_TOC):
Don't define.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/freebsd64.h
trunk/gcc/config/rs6000/linux64.h
trunk/gcc/config/rs6000/predicates.md
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/config/rs6000/rs6000.h
trunk/gcc/config/rs6000/rs6000.md
trunk/gcc/config/rs6000/sysv4.h
>From gcc-bugs-return-524255-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 00:26:51 2016
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From: "rs2740 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70942] [6/7 Regression] [c++14] Incorrect deduction of generic lambda `auto&&` parameter
Date: Thu, 05 May 2016 00:26:00 -0000
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--- Comment #2 from TC <rs2740 at gmail dot com> ---
This only appears to affect captureless generic lambdas with a deduced return
type.
It might have something to do with the conversion function template to function
pointer - I'm guessing that it was somehow instantiated for the wrong template
argument during overload resolution, which result in the lambda's body being
instantiated with the wrong argument too (to deduce the return type), which
triggers the error.
>From gcc-bugs-return-524256-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 02:10:19 2016
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From: "w.clodius at icloud dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70959] New: Invalid change of value conversion warning message
Date: Thu, 05 May 2016 02:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70959
Bug ID: 70959
Summary: Invalid change of value conversion warning message
Product: gcc
Version: unknown
Status: UNCONFIRMED
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Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: w.clodius at icloud dot com
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Created attachment 38415
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38415&action=edit
A simplified program generating the inappropriate error
The file
module test_int
use, intrinsic:: iso_fortran_env
integer(int64), parameter :: &
e18 = 1000000000000000000_int64, &
e19 = ( -huge(1_int64) + &
(e18-223372036854775807_int64) &
) - 2
end module test_int
when compiled using
fortran -std=f2008 -fmax-errors=10 -Wall -Wimplicit-interface -O3 -fbacktrace
-fwhole-file -I mod_dir -c -o test_int.o test_int.f90
on Mac OS X version 10.11.4
with version
gfortran --version
GNU Fortran (GCC) 6.1.0
Copyright (C) 2016 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.
produces the message
test_int.f90:5:11:
e18 = 1000000000000000000_int64, &
1
Warning: Change of value in conversion from ‘INTEGER(8)’ to ‘REAL(4)’ at (1)
[-Wconversion]
This suggests that the front end is assigning the wrong type to at least one of
e18
e19
or the expression
( -huge(1_int64) + (e18-223372036854775807_int64) ) - 2
According to Dominique D'Humières the following simplified code has the result
! integer(8), parameter :: e18 = 10000000000_8
integer(8), parameter :: e18 = 100000000000_8
integer(8), parameter :: e19 = (e18)
! integer(8), parameter :: e19 = e18
print *, e18, e19
end
warn_conv_db_3.f90:2:32:
integer(8), parameter :: e18 = 100000000000_8
1
Warning: Change of value in conversion from 'INTEGER(8)' to 'REAL(4)' at (1)
[-Wconversion]
The warning is gone if I remove the parentheses in e19 = (e18) or if I replace
100000000000_8 with 10000000000_8.
which suggests that e18 is being assigned the inappropriate type due to the
appearance of (e18) in the definition of e19
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Subject: [Bug fortran/70959] Invalid type determination due to expression in a type declaration statement
Date: Thu, 05 May 2016 02:18:00 -0000
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William Clodius <w.clodius at icloud dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|unknown |6.1.0
Summary|Invalid change of value |Invalid type determination
|conversion warning message |due to expression in a type
| |declaration statement
Severity|normal |major
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From: "sd.foolegg at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70810] std::function template variadic template arguments do not unpack in function template
Date: Thu, 05 May 2016 03:08:00 -0000
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sd.foolegg at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |UNCONFIRMED
Resolution|INVALID |---
--- Comment #3 from sd.foolegg at gmail dot com ---
(In reply to Jonathan Wakely from comment #1)
> Not a bug, the parameter pack for std::function<void(Ts...)> cannot be
> deduced from the arguments, because a function pointer is not a
> std::function.
why below code can run?:
template<typename ... Ts>
struct Invoker {
void invoke(std::function<void(Ts ...)> f, Ts ... args) {
f(args ...);
}
};
Invoker<std::string, int> invoker;
invoker.invoke(foo, "a", 1); // ok
and visual studio 2015 can deduce parameter pack normally (same code).
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Subject: [Bug rtl-optimization/70890] [7 regression] r235660 miscompiles stage2 compiler on ia64
Date: Thu, 05 May 2016 04:02:00 -0000
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Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Alan Modra <amodra at gmail dot com> ---
https://gcc.gnu.org/ml/gcc-testresults/2016-05/msg00331.html
>From gcc-bugs-return-524260-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 05:38:30 2016
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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/70959] Invalid type determination due to expression in a type declaration statement
Date: Thu, 05 May 2016 05:38:00 -0000
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jvdelisle at gcc dot gnu.org
--- Comment #1 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
With the parenthesis around the constant, it is being interpreted as a complex
number. The check in arith.c is taking this as a component of the complex
constant.
match_complex_constant in primary.c probably returns a MATCH_NO, but I think
the warning is occurring in the middle of the attempted matching process.
#0 gfc_warning_now (opt=opt@entry=201,
gmsgid=gmsgid@entry=0x140c530 "Change of value in conversion from %qs to
%qs at %L") at ../../trunk/gcc/fortran/error.c:1148
#1 0x000000000062e0ce in gfc_int2real (src=0x1ff3db0, kind=4)
at ../../trunk/gcc/fortran/arith.c:2079
#2 0x00000000006abb35 in match_sym_complex_part (result=0x7fffffffd400)
at ../../trunk/gcc/fortran/primary.c:1289
#3 match_complex_part (result=0x7fffffffd400)
at ../../trunk/gcc/fortran/primary.c:1314
#4 0x00000000006abbc2 in match_complex_constant (
result=result@entry=0x7fffffffd690)
at ../../trunk/gcc/fortran/primary.c:1347
>From gcc-bugs-return-524261-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 07:08:12 2016
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70956] ICE in build_cross_bb_scalars_def, at graphite-scop-detection.c:1725
Date: Thu, 05 May 2016 07:08:00 -0000
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vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
--- Comment #1 from vries at gcc dot gnu.org ---
Consider graphite_find_cross_bb_scalar_vars:
...
static void
graphite_find_cross_bb_scalar_vars (scop_p scop, gimple *stmt,
vec<scalar_use> *reads, vec<tree> *writes)
{
tree def;
if (gimple_code (stmt) == GIMPLE_ASSIGN)
def = gimple_assign_lhs (stmt);
else if (gimple_code (stmt) == GIMPLE_CALL)
def = gimple_call_lhs (stmt);
else if (gimple_code (stmt) == GIMPLE_PHI)
def = gimple_phi_result (stmt);
else
return;
build_cross_bb_scalars_def (scop, def, gimple_bb (stmt), writes);
...
...
We arrive at graphite_find_cross_bb_scalar_vars with:
...
(gdb) call debug_gimple_stmt (stmt)
# VUSE <.MEM_10(D)>
f2 (_1);
...
The call is resultless, so def becomes NULL_TREE.
This tentative patch handles NULL_TREE def in build_cross_bb_scalars_def, and
fixes the assert:
...
diff --git a/gcc/graphite-scop-detection.c b/gcc/graphite-scop-detection.c
index 7615842..dd50a1e 100644
--- a/gcc/graphite-scop-detection.c
+++ b/gcc/graphite-scop-detection.c
@@ -1722,8 +1722,7 @@ static void
build_cross_bb_scalars_def (scop_p scop, tree def, basic_block def_bb,
vec<tree> *writes)
{
- gcc_assert (def);
- if (!is_gimple_reg (def))
+ if (!def || !is_gimple_reg (def))
return;
/* Do not gather scalar variables that can be analyzed by SCEV as they can
be
...
>From gcc-bugs-return-524262-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 08:39:32 2016
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From: "rogero at howzatt dot demon.co.uk" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/53984] iostream operation throwing exception when exceptions not enabled
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--- Comment #5 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Still fails with gcc 6.1
Are there any plans on how (and when) to fix this, fairly serious, fault?
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Subject: [Bug c/70955] regression in code generation for __builtin_ms_va_list in GCC 6.1
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--- Comment #1 from zenith432 at users dot sourceforge.net ---
Created attachment 38416
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38416&action=edit
va_main.c
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Subject: [Bug c/70955] regression in code generation for __builtin_ms_va_list in GCC 6.1
Date: Thu, 05 May 2016 08:52:00 -0000
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--- Comment #2 from zenith432 at users dot sourceforge.net ---
Created attachment 38417
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va_test.c
>From gcc-bugs-return-524265-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 08:54:50 2016
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From: "zenith432 at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70955] regression in code generation for __builtin_ms_va_list in GCC 6.1
Date: Thu, 05 May 2016 08:54:00 -0000
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zenith432 at users dot sourceforge.net changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |target
--- Comment #3 from zenith432 at users dot sourceforge.net ---
This only happens when compiling with -flto.
Attached is a standalone sample (va_main.c + va_test.c)
gcc -v
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/6.1.1/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 6.1.1 20160427 (Red Hat 6.1.1-1) (GCC)
gcc -o prog va_main.c va_test.c
./prog
sum == 15
gcc -o prog_flto -flto va_main.c va_test.c
./prog_flto
Segmentation fault (core dumped)
>From gcc-bugs-return-524266-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 08:59:39 2016
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Subject: [Bug c/70954] -Wmisleading-indentation false positive on GNU "ed"
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-05
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70959] [6/7 Regression] Invalid type determination due to expression in a type declaration statement
Date: Thu, 05 May 2016 09:07:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-05
CC| |tkoenig at gcc dot gnu.org
Known to work| |5.3.0
Summary|Invalid type determination |[6/7 Regression] Invalid
|due to expression in a type |type determination due to
|declaration statement |expression in a type
| |declaration statement
Ever confirmed|0 |1
Known to fail| |6.1.0, 7.0
Severity|major |normal
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This is a regression due to r224190.
>From gcc-bugs-return-524268-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 09:15:42 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70810] std::function template variadic template arguments do not unpack in function template
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The compiler doesn't have to deduce the parameter pack Ts... in that example,
because it is provided explicitly here:
Invoker<std::string, int> invoker;
and so the compiler knows the exact type of std::function<void(Ts...)> here:
invoker.invoke(foo, "a", 1); // ok
without needing to deduce anything.
If Visual Studio compiles it then that seems like a bug in VC++ to me.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/70955] [6/7 Regression] Wrong code generation for __builtin_ms_va_list with -flto
Date: Thu, 05 May 2016 09:16:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-05
Component|target |lto
Known to work| |5.3.0
Summary|regression in code |[6/7 Regression] Wrong code
|generation for |generation for
|__builtin_ms_va_list in GCC |__builtin_ms_va_list with
|6.1 |-flto
Ever confirmed|0 |1
Known to fail| |6.1.0, 7.0
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed.
>From gcc-bugs-return-524270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 09:24:01 2016
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Subject: [Bug c++/70810] std::function template variadic template arguments do not unpack in function template
Date: Thu, 05 May 2016 09:24:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Here is a simplified version of your code which gives an error using GCC, Clang
and Intel icc:
template<typename T>
T declval();
template<typename... T>
struct function {
template<typename F, typename = decltype(declval<F>()(declval<T>()...))>
function(F) { }
void operator()(T...) const { }
};
template<typename ... Ts>
struct Invoker {
void invoke(function<Ts ...> f, Ts ... args) {
f(args ...);
}
};
template<typename ... Ts>
void invoke(function<Ts ...> f, Ts ... args) {
f(args ...);
}
struct string {
string(const char*) { }
};
void foo(string, int) {
}
int main() {
Invoker<string, int> invoker;
invoker.invoke(foo, "a", 1); // ok
invoke<string, int>(foo, "a", 1); // fail
}
>From gcc-bugs-return-524271-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 09:38:51 2016
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From: "Joost.VandeVondele at mat dot ethz.ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70960] New: [7.0 Regression] ICE: tree check: expected ssa_name, have integer_cst in ifcvt_walk_pattern_tree, at tree-if-conv.c:2465
Date: Thu, 05 May 2016 09:38:00 -0000
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Bug ID: 70960
Summary: [7.0 Regression] ICE: tree check: expected ssa_name,
have integer_cst in ifcvt_walk_pattern_tree, at
tree-if-conv.c:2465
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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Reporter: Joost.VandeVondele at mat dot ethz.ch
Target Milestone: ---
recent trunk regression:
> cat bug.f90
SUBROUTINE calbrec(a,ai,error)
REAL(KIND=8) :: a(3,3), ai(3,3)
DO i = 1, 3
il = 1
IF (i==1) il = 2
DO j = 1, 3
ai(j,i) = (-1.0_8)**(i+j)*det*(a(il,jl)*a(iu,ju)-a(il,ju)*a(iu,jl))
END DO
END DO
END SUBROUTINE calbrec
> gfortran -c -fprofile-generate -O3 bug.f90
bug.f90:1:0:
SUBROUTINE calbrec(a,ai,error)
internal compiler error: tree check: expected ssa_name, have integer_cst in
ifcvt_walk_pattern_tree, at tree-if-conv.c:2465
0xe42ad4 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc/gcc/tree.c:9753
0xc095d6 tree_check
../../gcc/gcc/tree.h:3025
0xc095d6 ifcvt_walk_pattern_tree
../../gcc/gcc/tree-if-conv.c:2465
0xc094e0 ifcvt_walk_pattern_tree
../../gcc/gcc/tree-if-conv.c:2491
0xc0edbe ifcvt_repair_bool_pattern
../../gcc/gcc/tree-if-conv.c:2580
0xc0edbe tree_if_conversion
../../gcc/gcc/tree-if-conv.c:2746
0xc0edbe execute
../../gcc/gcc/tree-if-conv.c:2829
0xc0edbe execute
../../gcc/gcc/tree-if-conv.c:2808
Please submit a full bug report,
> gfortran -v
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/data/vjoost/gnu/gcc_trunk/install/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/data/vjoost/gnu/gcc_trunk/install
--enable-languages=c,c++,fortran --disable-multilib --enable-plugins
--enable-lto --disable-bootstrap
Thread model: posix
gcc version 7.0.0 20160505 (experimental) [trunk revision 235918] (GCC)
>From gcc-bugs-return-524272-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 10:20:21 2016
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Subject: [Bug middle-end/70960] [7 Regression] ICE: tree check: expected ssa_name, have integer_cst in ifcvt_walk_pattern_tree, at tree-if-conv.c:2465
Date: Thu, 05 May 2016 10:20:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-05
Known to work| |6.1.0
Summary|[7.0 Regression] ICE: tree |[7 Regression] ICE: tree
|check: expected ssa_name, |check: expected ssa_name,
|have integer_cst in |have integer_cst in
|ifcvt_walk_pattern_tree, at |ifcvt_walk_pattern_tree, at
|tree-if-conv.c:2465 |tree-if-conv.c:2465
Ever confirmed|0 |1
Known to fail| |7.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The change occurred between revisions r235803 (OK) and r235816 (ICE).
>From gcc-bugs-return-524273-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 10:51:58 2016
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From: "blastrock at free dot fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/70517] c++filt crashes when demangling a symbol
Date: Thu, 05 May 2016 10:51:00 -0000
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blastrock at free dot fr changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #38165|0 |1
is obsolete| |
Attachment #38166|0 |1
is obsolete| |
--- Comment #3 from blastrock at free dot fr ---
Created attachment 38418
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38418&action=edit
Very small test case
I investigated this bug a little more and managed to produce a very small test
case.
Compile this file with g++ 5.3.1 and clang 3.8 and you will get these two
symbols:
_Z4moveIRZ5awaitIRiEDaOT_EUlRKS3_E_ES4_S4_ from clang
_Z4moveIRZ5awaitIRiEDaOT_EUlRKS2_E_ES3_S3_ from gcc
When trying c++filt on the one got from gcc, it will just fail demangling it
and print it raw. But when we do it with the one produced by clang, we get a
crash. The only difference I see there is the substitutions which are shifted
by one on the clang version (I have no idea which compiler is right though).
I enabled the debug stuff from the demangle binary in libiberty and got this (I
added the addresses of the nodes for debugging):
0x7fffffffd620: typed name
0x7fffffffd5d8: template
0x7fffffffd410: name 'move'
0x7fffffffd5c0: template argument list
0x7fffffffd5a8: reference
0x7fffffffd590: local name
0x7fffffffd518: typed name
0x7fffffffd488: template
0x7fffffffd428: name 'await'
0x7fffffffd470: template argument list
0x7fffffffd458: reference
0x7fffffffd440: builtin type int
0x7fffffffd500: function type
0x7fffffffd4a0: name 'auto'
0x7fffffffd4e8: argument list
0x7fffffffd4d0: rvalue reference
0x7fffffffd4b8: template parameter 0
0x7fffffffd578: lambda 0
0x7fffffffd560: argument list
0x7fffffffd548: reference
0x7fffffffd530: const
0x7fffffffd4d0: rvalue reference
0x7fffffffd4b8: template parameter 0
0x7fffffffd608: function type
0x7fffffffd530: const
0x7fffffffd4d0: rvalue reference
0x7fffffffd4b8: template parameter 0
0x7fffffffd5f0: argument list
0x7fffffffd530: const
0x7fffffffd4d0: rvalue reference
0x7fffffffd4b8: template parameter 0
What I understand is that when libiberty goes down the first branch, the
"template parameter 0" references this same branch and so we get infinite
recursion. I guess we can at least prevent the crash if we keep in the state a
variable saying which template parameter we are referencing so that we don't go
down the same path infinitely.
My (de)mangling skills are still very low and I don't think I can solve this
one alone. Any help is appreciated.
>From gcc-bugs-return-524274-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 11:12:47 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
Date: Thu, 05 May 2016 11:12:00 -0000
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--- Comment #29 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 38419
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38419&action=edit
Patch to fix problematic splitters
I'm testing the attached patch that introduces
ix86_standard_x87sse_constant_load_p function, and uses it to limit problematic
splitters only to cases, where we can actually transform the insn to a constant
load.
>From gcc-bugs-return-524275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 12:06:33 2016
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Subject: [Bug tree-optimization/63586] x+x+x+x -> 4*x in gimple
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kugan at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zboson at zboson dot net
--- Comment #7 from kugan at gcc dot gnu.org ---
*** Bug 68105 has been marked as a duplicate of this bug. ***
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From: "kugan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/68105] optimizing repeated floating point addition to multiplication
Date: Thu, 05 May 2016 12:06:00 -0000
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kugan at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #2 from kugan at gcc dot gnu.org ---
Looks like a duplicate of PR63586.
*** This bug has been marked as a duplicate of bug 63586 ***
>From gcc-bugs-return-524277-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 12:09:25 2016
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From: "ramana at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/70896] gcc4 ABI compatible bootstrap fails
Date: Thu, 05 May 2016 12:09:00 -0000
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
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--- Comment #5 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to PeteVine from comment #4)
> Until it failed again during the fortran part:
>
> ../../../libgfortran/io/transfer.c: In function ‘bswap_array’:
> ../../../libgfortran/io/transfer.c:915:25: fatal error: You must enable NEON
> instructions (e.g. -mfloat-abi=softfp -mfpu=neon) to use these intrinsics.
> ((uint16_t*)dest)[i] = __builtin_bswap16 (((uint16_t*)src)[i]);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> compilation terminated.
> make[3]: *** [transfer.lo] Error 1
>
> but that looks like user error. It would be nice if `configure` could abort
> or at least warn on not finding `-mfpu=neon` among CFLAGS if fortran was
> enabled.
>
Strange - that shouldn't be happening and certainly looks like a bug - there
are a number of folks who bootstrap in Thumb mode and --with-fpu=vfpv3-d16
which is essentially the same as vfpv3 but with only 16 D registers.
I'm not sure what's going on here.
>From gcc-bugs-return-524278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 12:55:32 2016
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From: "wdijkstr at arm dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/70961] New: Regrename ignores preferred_rename_class
Date: Thu, 05 May 2016 12:55:00 -0000
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Bug ID: 70961
Summary: Regrename ignores preferred_rename_class
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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Priority: P3
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When deciding which register to use regrename.c calls the target function
preferred_rename_class. However in pass 2 in find_rename_reg it then just
ignores this preference. This results in significantly increased codesize on
targets which prefer a subset of allocatable registers in order to use smaller
instructions.
Also the computed super_class appears to be the union of all uses and defs
instead of the intersection. This should be the intersection as that is the set
of registers that all uses and defs support.
If the preferred class doesn't result in a valid rename then it could search a
wider class, but then it would need to check that the size of the newly
selected patterns does not increase.
>From gcc-bugs-return-524279-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 13:01:52 2016
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Subject: [Bug c++/70962] New: optimization not working in Red Hat 5.7 after glibc patching
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$ cat tt.c
#include <fstream>
#include <iostream>
int main( const int argc, const char * argv[] )
{
std::ifstream in;
in.open( "/dev/null", std::ios::in );
if (in.is_open() ) {
std::cout << "opened" << std::endl;
} else {
std::cout << "failed" << std::endl;
}
return 0;
}
$ g++ tt.c && a.out
opened
$ g++ -O2 tt.c && a.out
failed
>From gcc-bugs-return-524280-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 13:48:22 2016
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Subject: [Bug c++/70962] optimization not working in Red Hat 5.7 after glibc patching
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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> ---
Not a gcc issue. Please report this to redhat directly.
>From gcc-bugs-return-524281-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 13:51:53 2016
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Subject: [Bug lto/70955] [6/7 Regression] Wrong code generation for __builtin_ms_va_list with -flto
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H.J. Lu <hjl.tools at gmail dot com> changed:
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--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
This may be related to PR 50818.
>From gcc-bugs-return-524282-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 13:59:12 2016
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Subject: [Bug tree-optimization/68105] optimizing repeated floating point addition to multiplication
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--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to zboson from comment #0)
> In addition, the following equations are always true even without
> associative math.
>
> 2*a = a + a
> 3*a = a + a + a
> 4*a = a + a + a + a
> 5*a = a + a + a + a + a
>
> It turns out that GCC does simplify a + a + a + a to 4*a but only with
> associative math enabled e.g. with -Ofast when it could do it with -O3.
This "always true" needs some qualification. It is wrong with -frounding-math,
where you have to stop at 3 IIRC.
(In reply to kugan from comment #2)
> Looks like a duplicate of PR63586.
I am not convinced this is completely a dup. The patch
https://gcc.gnu.org/ml/gcc-patches/2016-05/msg00368.html would probably close
PR63586, but not this one since all of the testcases about float in that patch
use -ffast-math.
>From gcc-bugs-return-524283-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 14:12:36 2016
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Subject: [Bug tree-optimization/70956] ICE in build_cross_bb_scalars_def, at graphite-scop-detection.c:1725
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--- Comment #2 from Sebastian Pop <spop at gcc dot gnu.org> ---
The change looks good to me.
>From gcc-bugs-return-524284-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 15:15:42 2016
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=16106
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |msebor at gcc dot gnu.org
Known to work| |4.8.5, 4.9.3, 5.3.0, 6.1.0
Resolution|--- |FIXED
Known to fail| |4.5.3
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Thank you for the update. Resolving as Fixed.
>From gcc-bugs-return-524285-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 16:06:42 2016
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From: "markos at freevec dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70963] New: vec_cts/vec_ctf intrinsics produce wrong results for 64-bit floating point
Date: Thu, 05 May 2016 16:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70963
Bug ID: 70963
Summary: vec_cts/vec_ctf intrinsics produce wrong results for
64-bit floating point
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: markos at freevec dot org
Target Milestone: ---
Host: powerpc64le-linux-gnu
Target: powerpc64le-linux-gnu
Build: powerpc64le-linux-gnu
Created attachment 38420
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38420&action=edit
small test program to verify vec_cts/vec_ctf working on doubles
I've noticed some tests in Eigen failing for VSX 64-bit doubles code, when the
algorithm looked perfectly normal. Further investigation -and comparison with
direct output using same inputs from an SSE test program, showed that the
conversion to integer yielded 0 results in the case of VSX (vec_cts basically
returned 0 vectors). I've written a small test case that verifies this on both
big/little endian VSX-capable systems (compiled with -m64 -mvsx). When using
the intrinsic the result is wrong, when using the inline asm version, it works
as expected. I could not test it in a more recent gcc so it may well be fixed,
however it would be great if this would be backported to gcc 5.
Some asm output follows from test program (attached):
vec_cts:
1000066c: 60 67 00 f0 xvcvdpsxds vs0,vs12
10000670: 50 02 00 f0 xxswapd vs0,vs0
asm:
10000674: 51 02 00 f0 xxswapd vs32,vs0
10000678: 60 07 00 f0 xvcvdpsxds vs0,vs0
1000067c: 56 02 00 f0 xxswapd vs0,vs32
vec_ctf:
100006f8: 50 02 00 f0 xxswapd vs0,vs0
100006fc: e0 07 00 f0 xvcvsxddp vs0,vs0
10000700: 50 02 00 f0 xxswapd vs0,vs0
asm:
100006f8: 51 02 00 f0 xxswapd vs32,vs0
100006fc: e0 07 00 f0 xvcvsxddp vs0,vs0
10000700: 56 02 00 f0 xxswapd vs0,vs32
>From gcc-bugs-return-524286-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 16:20:50 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70964] New: [7 Regression] internal compiler error: in single_succ_edge, at basic-block.h:351
Date: Thu, 05 May 2016 16:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70964
Bug ID: 70964
Summary: [7 Regression] internal compiler error: in
single_succ_edge, at basic-block.h:351
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ktkachov at gcc dot gnu.org
Target Milestone: ---
Target: aarch64
The testcase:
int a, c, d, e, f;
int b[0];
void
fn1 ()
{
int g;
long h;
for (;;)
{
g = a < 0 ?: g;
long i = d = i < 0 && g < i ?: g + i;
f = 6;
for (; f; f--)
{
h = 6;
for (; h; h--)
{
int j;
long *k;
d || j && (*k = c);
b[f] = e;
}
}
}
}
ICEs on aarch64-none-linux-gnu compiled with -Ofast.
mycrash.c: In function ‘fn1’:
mycrash.c:4:1: internal compiler error: in single_succ_edge, at
basic-block.h:351
fn1 ()
^~~
0x6fdf23 single_succ_edge
$SRC/gcc/basic-block.h:351
0x6fdf23 lv_adjust_loop_entry_edge
$SRC/gcc/cfgloopmanip.c:1658
0x6fdf23 loop_version(loop*, void*, basic_block_def**, unsigned int, unsigned
int, unsigned int, bool)
$SRC/gcc/cfgloopmanip.c:1726
0xb494ff version_loop_for_if_conversion
$SRC/gcc/tree-if-conv.c:2333
0xb494ff tree_if_conversion
$SRC/gcc/tree-if-conv.c:2735
0xb494ff execute
$SRC/gcc/tree-if-conv.c:2829
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.
Bisection shows this started with r235842.
>From gcc-bugs-return-524287-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 16:21:21 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70964] [7 Regression] internal compiler error: in single_succ_edge, at basic-block.h:351
Date: Thu, 05 May 2016 16:21:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.1.0
Target Milestone|--- |7.0
Known to fail| |7.0
>From gcc-bugs-return-524288-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 16:21:45 2016
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Subject: [Bug tree-optimization/57206] Auto-vectorization fails when array index is an unsigned int expression
Date: Thu, 05 May 2016 16:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57206
--- Comment #5 from amker at gcc dot gnu.org ---
Author: amker
Date: Thu May 5 16:20:54 2016
New Revision: 235926
URL: https://gcc.gnu.org/viewcvs?rev=235926&root=gcc&view=rev
Log:
gcc/testsuite
PR tree-optimization/57206
* gcc.dg/vect/pr57206.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr57206.c
Modified:
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-524289-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 17:41:43 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/32003] Undocumened -fdump-tree options
Date: Thu, 05 May 2016 17:41:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2012-01-28 00:00:00 |2016-5-5
CC| |msebor at gcc dot gnu.org
Known to fail| |4.3.0, 4.5.3, 4.8.3, 4.9.3,
| |5.3.0, 6.1.0
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
The -fdump-tree-objsz is also undocumented.
I tried to get a comprehensive list of all undocumented tree dumps. Here's
what I came up with for GCC 6.1. It looks like the vast majority of them are,
in fact, undocumented.
ipa-afdo
ipa-build_ssa_passes
ipa-cdtor
ipa-chkp_cleanup
ipa-chkp_ecleanup
ipa-chkp_passes
ipa-chkp_versioning
ipa-comdats
ipa-cp
ipa-devirt
ipa-dispachercalls
ipa-emutls
ipa-free-inline-summary
ipa-hsa
ipa-icf
ipa-increase_alignment
ipa-inline
ipa-ipa_oacc
ipa-ipa_oacc_kernels
ipa-opt_local_passes
ipa-profile
ipa-profile_estimate
ipa-pta1
ipa-pure-const
ipa-simdclone
ipa-single-use
ipa-static-var
ipa-targetclone
ipa-tmipa
ipa-visibility
ipa-whole-program
statistics
aprefetch
asan0
asan1
bswap
ccp1
cdce
cddce1
ch1
chkp
chkpopt
ch_vect
copyprop1
cplxlower0
cplxlower1
crited1
cselim
cunroll
cunrolli
dce1
dom1
dse1
ealias
early_optimizations
eh
ehcleanup1
ehdisp
ehopt
einline
eipa_sra
esra
fab1
feedback_fnsplit
fix_loops
fixup_cfg1
fnsplit
forwprop1
fre1
graphite
graphite0
hsagen
ifcombine
ifcvt
inline_param1
isolate-paths
ivcanon
ivopts
laddress
ldist
lim1
local-pure-const1
loop
loopdone
loopinit
lower
lower_vaarg
mergephi1
no_loop
nothrow
oacc_kernels
objsz1
ompexp
ompexpssa1
omplower
omptargetlink
parloops1
pcom
phicprop1
phiopt1
phiprop
profile_estimate
reassoc1
recip
release_ssa
resx
retslot
sancov1
sancov_O0
sanopt
sccp
simduid1
sincos
slp1
slsr
split-paths
stdarg
strlen
switchconv
tailc
tailr1
tmedge
tmlower
tmmark
tmmemopt
tracer
tsan0
tsan1
ubsan
uncprop1
uninit1
unswitch
veclower
veclower21
vrp1
vtable-verify
widening_mul
>From gcc-bugs-return-524290-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 17:47:56 2016
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Subject: [Bug middle-end/32003] Undocumened -fdump-tree options
Date: Thu, 05 May 2016 17:47:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I don't see much value in documenting those. It seems to me that we should
simply document that the format is -fdump-{tree,ipa,rtl}-<PASS>[-<DETAILS>].
>From gcc-bugs-return-524291-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 18:10:30 2016
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Subject: [Bug c++/70965] New: ice in useless_type_conversion_p
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70965
Bug ID: 70965
Summary: ice in useless_type_conversion_p
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
Created attachment 38421
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38421&action=edit
gzipped C++ source code
The attached C++ code, when compiled by gcc trunk dated 20160504,
does this:
/home/dcb/rpmbuild/BUILD/libkolabxml-1.0.3/src/kolabformat.cpp:291:1: internal
compiler error: Segmentation fault
}
^
0xe5113f crash_signal
../../src/trunk/gcc/toplev.c:333
0xb510c0 useless_type_conversion_p(tree_node*, tree_node*)
../../src/trunk/gcc/gimple-expr.c:67
0xf419d0 callsite_arguments_match_p
../../src/trunk/gcc/tree-sra.c:1371
0xf419d0 some_callers_have_mismatched_arguments_p
../../src/trunk/gcc/tree-sra.c:5063
Flag -O2 required.
>From gcc-bugs-return-524292-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 18:15:45 2016
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Subject: [Bug c++/70965] ice in useless_type_conversion_p
Date: Thu, 05 May 2016 18:15:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-05
CC| |mpolacek at gcc dot gnu.org
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-524293-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 18:41:51 2016
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From: "zenith432 at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/70955] [6/7 Regression] Wrong code generation for __builtin_ms_va_list with -flto
Date: Thu, 05 May 2016 18:41:00 -0000
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--- Comment #6 from zenith432 at users dot sourceforge.net ---
(In reply to H.J. Lu from comment #5)
> This may be related to PR 50818.
PR 50818 has morphed into a feature request that the canonical
__builtin_va_{list,start,end,copy} builtins behave according to the ABI of the
function they're in. Today they behave according to the '-mabi=' setting on
the command line.
This is bug report that the specialized __builtin_ms_va_{list,start,end,copy}
builtins have stopped working when -flto is used. They worked until gcc 5.3,
both with or without -flto. In gcc 6.1 with -flto, the canonical iterator
__builtin_va_arg ignores them and works on a sysv_va_list. To be precise, it's
__builtin_va_arg in the context of -flto that's broken, not the specialized
builtins. __builtin_va_arg has always been a polymorphic builtin that changes
its behavior based on the type of va_list it's given as an argument. Without
this polymorphic behavior, there's no way to iterate over an ms_va_list.
>From gcc-bugs-return-524294-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 19:25:52 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/32003] Undocumened -fdump-tree options
Date: Thu, 05 May 2016 19:25:00 -0000
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--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
With most of the documentation for each option consisting of "the file name is
made by appending .xxx to the source file name" I agree that in its current
form and state of completion the documentation isn't very useful.
I also suspect that providing descriptions for the currently undocumented
options and saying much more than what's in the boilerplate blurb above is
unlikely.
I like the idea of providing a generic description instead, as long is it makes
it easy to derive the option names. I had to figure out by trial and error
that the name of the option controlling the Object Size Checking dumps is
-fdump-tree-objsz (by using -fdump-tree-all, looking at the suffix of the two
dump files, and appending it to -fdump-tree-). But after some experimenting
and poking around in the manual I realize there's a better way to do it:
1) Run GCC with -fdump-passes and look for the pass code (e.g., objsz for
Object Size Checking).
2) Append the pass code to the -fdump-tree- (or -fdump-rtl-) option to enable
the dump.
3) Use the pass code to find the name of the dump file created by GCC for the
pass (unless overridden).
So maybe this would be sufficient documentation for all the options. The one
thing missing is a description of what each of those passes actually does. For
some it's fairly obvious but for others not so much. Maybe a brief description
could be added to GCC's -fdump-passes output to help figure that out (e.g.,
under -fdump-passes=verbose if we want to keep the current output unchanged).
How does this sound?
>From gcc-bugs-return-524295-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 19:55:27 2016
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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/70875] ICE in get_ubsan_type_info_for_type with -fsanitize=undefined
Date: Thu, 05 May 2016 19:55:00 -0000
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Seems like an overzealous assert:
diff --git a/gcc/ubsan.c b/gcc/ubsan.c
index 802341e..080f798 100644
--- a/gcc/ubsan.c
+++ b/gcc/ubsan.c
@@ -302,11 +302,14 @@ ubsan_source_location (location_t loc)
static unsigned short
get_ubsan_type_info_for_type (tree type)
{
- gcc_assert (TYPE_SIZE (type) && tree_fits_uhwi_p (TYPE_SIZE (type)));
if (TREE_CODE (type) == REAL_TYPE)
- return tree_to_uhwi (TYPE_SIZE (type));
+ {
+ gcc_assert (TYPE_SIZE (type) && tree_fits_uhwi_p (TYPE_SIZE (type)));
+ return tree_to_uhwi (TYPE_SIZE (type));
+ }
else if (INTEGRAL_TYPE_P (type))
{
+ gcc_assert (TYPE_SIZE (type) && tree_fits_uhwi_p (TYPE_SIZE (type)));
int prec = exact_log2 (tree_to_uhwi (TYPE_SIZE (type)));
gcc_assert (prec != -1);
return (prec << 1) | !TYPE_UNSIGNED (type);
>From gcc-bugs-return-524296-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 19:59:54 2016
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Subject: [Bug sanitizer/70875] ICE in get_ubsan_type_info_for_type with -fsanitize=undefined
Date: Thu, 05 May 2016 19:59:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
tree_to_uhwi already contains the tree_fits_uhwi_p assert, so there is no
reason to duplicate that.
>From gcc-bugs-return-524297-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 21:22:26 2016
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70961] Regrename ignores preferred_rename_class
Date: Thu, 05 May 2016 21:22:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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CC| |ebotcazou at gcc dot gnu.org
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--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> When deciding which register to use regrename.c calls the target function
> preferred_rename_class. However in pass 2 in find_rename_reg it then just
> ignores this preference. This results in significantly increased codesize on
> targets which prefer a subset of allocatable registers in order to use
> smaller instructions.
Pass #2 ignores it since the preference simply couldn't be honored.
> Also the computed super_class appears to be the union of all uses and defs
> instead of the intersection. This should be the intersection as that is the
> set of registers that all uses and defs support.
The super_class has nothing to do with the class that is searched for renaming
registers though, it's just the info passed to the back-end to compute this
class. For example, on the ARM, the preferred_class will be LO_REGS for any
chain of GENERAL_REGS.
> If the preferred class doesn't result in a valid rename then it could search
> a wider class, but then it would need to check that the size of the newly
> selected patterns does not increase.
The size is an arbitrary criterion, this could also be the latency, etc.
>From gcc-bugs-return-524298-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 21:35:20 2016
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From: "eric at efcs dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/70966] New: new_delete_resource() has deinit lifetime issues.
Date: Thu, 05 May 2016 21:35:00 -0000
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Bug ID: 70966
Summary: new_delete_resource() has deinit lifetime issues.
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: eric at efcs dot ca
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Created attachment 38422
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38422&action=edit
example.cpp
The value returned from 'new_delete_resource()' should be usable at all stages
of program startup and termination.
In the current implementation the static deinitialization order fiasco can
occur when a static object 'obj' is constructed before the first call to
'new_delete_resource()' and 'obj' references 'new_delete_resource()' in its
destructor.
>From gcc-bugs-return-524299-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 21:45:31 2016
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Subject: [Bug rtl-optimization/70961] Regrename ignores preferred_rename_class
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70961
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> The super_class has nothing to do with the class that is searched for
> renaming registers though, it's just the info passed to the back-end to
> compute this class. For example, on the ARM, the preferred_class will be
> LO_REGS for any chain of GENERAL_REGS.
As a matter of fact, that might not be true, something like
Index: config/arm/arm.c
===================================================================
--- config/arm/arm.c (revision 235858)
+++ config/arm/arm.c (working copy)
@@ -27721,9 +27721,9 @@ static reg_class_t
arm_preferred_rename_class (reg_class_t rclass)
{
/* Thumb-2 instructions using LO_REGS may be smaller than instructions
- using GENERIC_REGS. During register rename pass, we prefer LO_REGS,
+ using GENERAL_REGS. During register rename pass, we prefer LO_REGS,
and code size can be reduced. */
- if (TARGET_THUMB2 && rclass == GENERAL_REGS)
+ if (TARGET_THUMB2 && reg_class_subset_p (rclass, GENERAL_REGS))
return LO_REGS;
else
return NO_REGS;
could be needed.
>From gcc-bugs-return-524300-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 22:28:34 2016
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From: "wilson at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/69848] poor vectorization of a loop from SPEC2006 464.h264ref
Date: Thu, 05 May 2016 22:28:00 -0000
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--- Comment #6 from Jim Wilson <wilson at gcc dot gnu.org> ---
Testing the vcond_mask* patch with make check gave 6 regressions for both armhf
and aarch64.
FAIL: gcc.dg/vect/pr65947-10.c (internal compiler error)
FAIL: gcc.dg/vect/pr65947-10.c (test for excess errors)
FAIL: gcc.dg/vect/pr65947-10.c scan-tree-dump-times vect "LOOP VECTORIZED" 2
FAIL: gcc.dg/vect/pr65947-10.c -flto -ffat-lto-objects (internal compiler
error)
FAIL: gcc.dg/vect/pr65947-10.c -flto -ffat-lto-objects (test for excess errors)
FAIL: gcc.dg/vect/pr65947-10.c -flto -ffat-lto-objects scan-tree-dump-times
vec
t "LOOP VECTORIZED" 2
The problem here looks like a flaw in the vcond* patterns. They support int
and fp compare operands, but only int selection operands. E.g. for
(A op B ? X : Y)
A and B can be either int or fp, but X and Y can only be int. Adding the
vcond_mask* patterns apparently causes gcc to call vcond* in ways it didn't
before, and that exposes the problem.
The x86 port is the only port with vcond and vcond_mask patterns, and it
supports all four combinations if int/fp compare/select operands, so it appears
that aarch64 should also.
I will need time to figure out how to fix the vcond* problems before I can
formally submit the vcond_mask* patch.
>From gcc-bugs-return-524301-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 22:31:15 2016
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From: "hpa at zytor dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70967] New: doc: Please document rotate idiom
Date: Thu, 05 May 2016 22:31:00 -0000
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Bug ID: 70967
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The idiom that gcc has recognized since time immemorial (gcc 2-something) to
generate a rotate:
((foo >> n) + (foo << (sizeof(foo) * CHAR_BIT - n))
/* | instead of + has been recognized for almost but not quite as long */
... is undefined behavior under the C standard when n == 0. There is a
technically portable idiom (bug 57157) which has been recognized since gcc
4.6.3, but that is not portable to older versions of gcc without generating
suboptimal code.
It would be great if the gcc manual could be augmented to document this idiom
for rotate as a GNU C extension so that people are less concerned about its
validity, and compilers that mimic the GNU C dialect (icc, clang, etc.) know to
implement it correctly.
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Subject: [Bug target/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
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--- Comment #30 from uros at gcc dot gnu.org ---
Author: uros
Date: Thu May 5 22:48:29 2016
New Revision: 235936
URL: https://gcc.gnu.org/viewcvs?rev=235936&root=gcc&view=rev
Log:
PR target/70873
* config/i386/i386-protos.h (ix86_standard_x87sse_constant_load_p):
New prototype.
* config/i386/i386.c (ix86_standard_x87sse_constant_load_p): New.
* config/i386/i386.md (push mem splitter): Use find_constant_src in
the splitter condition.
(FP load splitter): Use ix86_standard_x87sse_constant_load_p in
the splitter condition.
(FP float_extend load splitter): Ditto.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386-protos.h
trunk/gcc/config/i386/i386.c
trunk/gcc/config/i386/i386.md
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Subject: [Bug other/70968] New: Missed case for -Wmisleading-indentation
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Bug ID: 70968
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Compiling the following with current trunk:
===
void g(int);
void f1(int x)
{
if (x) {
g(x--);
} while (x);
}
void f2(int x)
{
if (x)
g(x--);
while (x);
}
void f3(int x)
{
if (x) g(x--); while (x);
}
===
(-Wall -W -O2) only warns for f3. f1 has quite misleading indentation.
A warning for "while (x);" wouldn't hurt either probably, if there is
no whitespace before the semicolon anyway, like in f3.
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Subject: [Bug bootstrap/70896] gcc4 ABI compatible bootstrap fails
Date: Thu, 05 May 2016 23:28:00 -0000
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--- Comment #6 from PeteVine <tulipawn at gmail dot com> ---
Building with -mfpu=neon has duly helped. The fpu configure option is probably
not relevant here (simply setting the default for emitted code) but rather the
CFLAGS used for compiling these intrinsics. (-mfpu=vfpv4)
>From gcc-bugs-return-524305-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 05 23:39:07 2016
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Subject: [Bug middle-end/70795] [7 Regression] gcc/libjava/interpret.cc:1948:1: ICE: in binds_to_current_def_p, at symtab.c:2232
Date: Thu, 05 May 2016 23:39:00 -0000
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--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 38423
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38423&action=edit
Preprocessed source
/test/gnu/gcc/objdir/./gcc/cc1plus -fpreprocessed interpret.ii -quiet -dumpbase
interpret.cc -auxbase-strip .libs/interpret.o -g -O2 -Wswitch-enum -Wextra
-Wall -version -fno-rtti -fnon-call-exceptions -fdollars-in-identifiers -fwrapv
-fPIC -o interpret.s
r235311 is okay. r235318 is bad.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70969] New: power64le ada bootstrap failure: s-unstyp.ads:40:15: violation of No_Elaboration_Code_All at line 42
Date: Fri, 06 May 2016 01:03:00 -0000
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Bug ID: 70969
Summary: power64le ada bootstrap failure: s-unstyp.ads:40:15:
violation of No_Elaboration_Code_All at line 42
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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Current trunk (7.0) fails to bootstrap on powerpc64le, due to the following
error:
/build/gcc-trunk-bootstrap/./gcc/xgcc -B/build/gcc-trunk-bootstrap/./gcc/
-B/usr/local/powerpc64le-unknown-linux-gnu/bin/
-B/usr/local/powerpc64le-unknown-linux-gnu/lib/ -isystem
/usr/local/powerpc64le-unknown-linux-gnu/include -isystem
/usr/local/powerpc64le-unknown-linux-gnu/sys-include -c -g -O2 -fPIC -W
-Wall -gnatpg -nostdinc s-unstyp.ads -o s-unstyp.o
s-unstyp.ads:40:15: violation of No_Elaboration_Code_All at line 42
s-unstyp.ads:40:15: unit "System" does not have No_Elaboration_Code_All
make[7]: *** [s-unstyp.o] Error 1
make[7]: Leaving directory `/build/gcc-trunk-bootstrap/gcc/ada/rts'
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From: "rcc.dark at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70970] New: Misaligned SSE with auto-vectorization
Date: Fri, 06 May 2016 01:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70970
Bug ID: 70970
Summary: Misaligned SSE with auto-vectorization
Product: gcc
Version: 5.3.0
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Created attachment 38424
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38424&action=edit
the code
Sorry if this has been reported before. I have tested it under:
gcc version 5.3.1 20151207 (Red Hat 5.3.1-2) (GCC)
gcc version 5.2.1 20151028 (Debian 5.2.1-23)
gcc version 6.1.0 (GCC) <----- Windows
gcc version 5.2.0 (GCC) <----- Windows, MinGW-W64
The following code crashes with -std=c++14 -O3:
#include <cstdint>
#include <malloc.h>
template<typename RI>
__attribute__ ((noinline))
void symmetric_difference(RI ai, RI af, RI bi)
{
while (ai != af) {
*ai++ ^= *bi++;
}
}
int main( )
{
auto p1 = reinterpret_cast<char*>(memalign(4096, 32));
auto p2 = reinterpret_cast<char*>(memalign(4096, 32));
// _aligned_malloc under Windows
auto ai = reinterpret_cast<std::uint64_t*>(p1 + 1);
auto bi = reinterpret_cast<std::uint64_t*>(p2 + 1);
symmetric_difference(ai, ai + 64, bi);
}
It stops crashing with -O2 or if I remove the + 1 to the pointers; GDB tells me
that the problem lies within:
vmovdqa YMMWORD PTR [rbx+rcx*1],ymm0
The register rbx is not aligned and rcx = 0. It seems that it is reading with
vmovdqu but storing with vmovdqa.
>From gcc-bugs-return-524308-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 01:19:49 2016
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
Date: Fri, 06 May 2016 01:19:00 -0000
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--- Comment #18 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Author: jvdelisle
Date: Fri May 6 01:18:59 2016
New Revision: 235941
URL: https://gcc.gnu.org/viewcvs?rev=235941&root=gcc&view=rev
Log:
2016-05-05 Jerry DeLisle <jvdelisle@gcc.gnu.org>
Backport from trunk.
PR libgfortran/70684
* io/list_read (next_char): Add '\r' to check for end of line.
factor. (two places)
PR libgfortran/70684
* gfortran.dg/list_read_14.f90: New test.
Added:
branches/gcc-4_9-branch/gcc/testsuite/gfortran.dg/list_read_14.f90
Modified:
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
branches/gcc-4_9-branch/libgfortran/ChangeLog
branches/gcc-4_9-branch/libgfortran/io/list_read.c
>From gcc-bugs-return-524309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 01:44:47 2016
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Subject: [Bug tree-optimization/70970] Misaligned SSE with auto-vectorization
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Rodrigo <rcc.dark at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #38424|0 |1
is obsolete| |
--- Comment #1 from Rodrigo <rcc.dark at gmail dot com> ---
Created attachment 38425
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38425&action=edit
code (fixed)
>From gcc-bugs-return-524310-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 01:45:46 2016
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Subject: [Bug tree-optimization/70970] Misaligned SSE with auto-vectorization
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--- Comment #2 from Rodrigo <rcc.dark at gmail dot com> ---
Just noticed a dumb mistake in the parameter order of memalign (_aligned_malloc
is (size, alignment); memalign is (alignment, size)) but the problem persists.
Also forgot that I had to use -march=native under 5.3.1 but not 5.2.0. Sorry
for the possible confusion this may cause, the computers in which I tested
differ a lot. I just hope you can reproduce it without problems.
>From gcc-bugs-return-524311-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 02:50:53 2016
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Subject: [Bug c++/70971] New: ICE in parameter pack expansion
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Bug ID: 70971
Summary: ICE in parameter pack expansion
Product: gcc
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This may not be totally minimal, but the following code:
#include <memory>
struct A {};
template <class X, class Y, class Z>
struct B : A { };
template <class... > struct typelist {};
template <class T> struct tag { using type = T; };
template <class... Ts, class... Cs>
std::unique_ptr<A> chooseB(typelist<Cs...> )
{
return std::unique_ptr<A>(new B<Ts...>);
}
template <class... Ts, class... Cs, class Idx, class... Rest>
std::unique_ptr<A> chooseB(typelist<Cs...> choices, Idx i, Rest... rest)
{
auto f = [=](auto tag){
return [=]{ return chooseB<Ts..., typename
decltype(tag)::type>(choices, rest...); };
};
std::function<std::unique_ptr<A>()> fs[] = {
f(tag<Cs>{})...
};
return fs[i]();
}
int main() {
auto p = chooseB(typelist<int, double, char>{}, 0, 1, 2);
}
on gcc 5.3 with g++ -std=c++1z -O2 -Wall -Wextra -Wconversion -pedantic
-pthread produced (http://coliru.stacked-crooked.com/a/8dfc904ff5476477)
main.cpp: In function 'std::unique_ptr<A> chooseB(typelist<Cs ...>, Idx, Rest
...) [with Ts = {}; Cs = {int, double, char}; Idx = int; Rest = {int, int}]':
main.cpp:29:1: error: unrecognizable insn:
}
^
(insn 28 19 29 2 (set (mem/c:SI (plus:DI (reg/f:DI 82 virtual-stack-vars)
(const_int -92 [0xffffffffffffffa4])) [65 MEM[(struct __lambda1
*)&fs + 4B]+0 S4 A32])
(reg/v 101 [ rest#0 ])) -1
(nil))
main.cpp:29:1: internal compiler error: in extract_insn, at recog.c:2287
libbacktrace could not find executable to open
With -g instead of -O2 it compiles but segfaults.
On clang it compiles fine.
>From gcc-bugs-return-524312-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 05:21:16 2016
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Subject: [Bug target/5360] [SH] Useless address inc-dec sequence for DFmode access
Date: Fri, 06 May 2016 05:21:00 -0000
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--- Comment #6 from Oleg Endo <olegendo at gcc dot gnu.org> ---
When compiling the following test with -m2a -mb -O2
double test (void)
{
return 123.123;
}
we get
mova .L2,r0
fmov.s @r0+,fr0
fmov.s @r0,fr1
rts
add #-4,r0
.L3:
.align 2
.L2:
.long 1079953375
.long 996432413
Although the address reg is dead after the last load, the add #-4 insn is not
eliminated. This is probably because the DFmode move patterns are split at a
late stage during compilation. The add #-4 has to be put there initially
because for the register allocator the DFmode constant looks like it doesn't
modify the address register. In some cases this allows optimizations of
consecutive constant loads, as in:
void test (double* out)
{
out[0] = 123.123;
out[1] = 222;
}
mova .L2,r0
fmov.s @r0+,fr2
fmov.s @r0+,fr3
add #4,r4
fmov.s fr3,@r4
fmov.s fr2,@-r4
fmov.s @r0+,fr2
fmov.s @r0,fr3
add #-4,r0
fmov.s fr2,@(8,r4)
fmov.s fr3,@(12,r4)
rts/n
.L3:
.align 2
.L2:
.long 1079953375
.long 996432413
.long 1080803328
.long 0
>From gcc-bugs-return-524313-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 06:22:42 2016
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Subject: [Bug bootstrap/70969] power64le ada bootstrap failure: s-unstyp.ads:40:15: violation of No_Elaboration_Code_All at line 42
Date: Fri, 06 May 2016 06:22:00 -0000
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
r216965 missed system-linux-ppc64.ads when it added pragma
No_Elaboration_Code_All.
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Subject: [Bug c++/70972] New: [6/7 Regression] Inheriting constructors taking parameters by value should move them, not copy
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70972
Bug ID: 70972
Summary: [6/7 Regression] Inheriting constructors taking
parameters by value should move them, not copy
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Keywords: rejects-valid, wrong-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rs2740 at gmail dot com
Target Milestone: ---
The following code, accepted by GCC 5.3, fails to compile in GCC 6.1 and 7:
struct moveonly {
moveonly(moveonly&&) = default;
moveonly() = default;
};
struct A {
A(moveonly) {}
};
struct B : A {
using A::A;
};
B b(moveonly{});
with a bogus error:
+ g++ -std=c++14 -O2 -Wall -pedantic -pthread main.cpp
main.cpp: In constructor 'B::B(moveonly)':
main.cpp:10:14: error: use of deleted function 'constexpr
moveonly::moveonly(const moveonly&)'
using A::A;
^
main.cpp:1:8: note: 'constexpr moveonly::moveonly(const moveonly&)' is
implicitly declared as deleted because 'moveonly' declares a move constructor
or move assignment operator
struct moveonly {
^~~~~~~~
main.cpp: At global scope:
main.cpp:13:15: note: synthesized method 'B::B(moveonly)' first required here
B b(moveonly{});
Per N4140 [class.inhctor]/8, an implicitly defined inheriting constructor
should cast a passed-by-value parameter to an rvalue before forwarding it to
the base class constructor:
> Each expression in the expression-list [of the mem-initializer for the base class] is of the form static_cast<T&&>(p), where p is the name of the corresponding constructor parameter and T is the declared type of p.
(The code above remains valid under the new inheriting constructor semantics in
P0136R1.)
However, GCC 6.1 looks for a copy constructor instead, and would call them
instead of move:
struct abort_on_copy{
abort_on_copy(abort_on_copy&&) = default;
abort_on_copy(const abort_on_copy&) { __builtin_abort(); }
abort_on_copy() = default;
};
struct A {
A(abort_on_copy) {}
};
struct B : A {
using A::A;
};
int main() {
B b(abort_on_copy{}); // aborts
}
>From gcc-bugs-return-524315-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 06:33:06 2016
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Subject: [Bug c++/70972] [6/7 Regression] Inheriting constructors taking parameters by value should move them, not copy
Date: Fri, 06 May 2016 06:33:00 -0000
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--- Comment #1 from TC <rs2740 at gmail dot com> ---
Originally from http://stackoverflow.com/q/37064993/2756719
>From gcc-bugs-return-524316-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 06:53:15 2016
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Subject: [Bug target/59400] [SH] gcc.c-torture/compile/pr55921.c fails with -O0 on big endian with FPU
Date: Fri, 06 May 2016 06:53:00 -0000
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Oleg Endo <olegendo at gcc dot gnu.org> ---
It seems the problem disappeared somewhere between r210624 and r216017 even
without LRA.
>From gcc-bugs-return-524317-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 07:07:02 2016
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From: "rs2740 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70972] [6/7 Regression] Inheriting constructors taking parameters by value should move them, not copy
Date: Fri, 06 May 2016 07:07:00 -0000
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--- Comment #2 from TC <rs2740 at gmail dot com> ---
Not exactly that familiar with GCC, but looking at
https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/cp/method.c?r1=233719&r2=233718&pathrev=233719
tree type = TREE_TYPE (parm);
if (DECL_PACK_P (parm))
type = PACK_EXPANSION_PATTERN (type);
exp = build_static_cast (type, exp, tf_warning_or_error);
This seems to do the equivalent of `static_cast<decltype(p)>(p)` (which is a
copy) rather than the desired `static_cast<decltype(p)&&>(p)`. Consistent with
this hypothesis, with -fno-elide-constructors, a copy constructor call is
emitted *in addition to* a move constructor call
(http://coliru.stacked-crooked.com/a/5dd154da9c26472f), rather than instead of
one.
>From gcc-bugs-return-524318-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 07:21:37 2016
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Subject: [Bug tree-optimization/70960] [7 Regression] ICE: tree check: expected ssa_name, have integer_cst in ifcvt_walk_pattern_tree, at tree-if-conv.c:2465
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|middle-end |tree-optimization
Target Milestone|--- |7.0
>From gcc-bugs-return-524319-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 07:33:54 2016
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Subject: [Bug tree-optimization/70960] [7 Regression] ICE: tree check: expected ssa_name, have integer_cst in ifcvt_walk_pattern_tree, at tree-if-conv.c:2465
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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 #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed, a latent issue also present on branches. ifcvt_walk_pattern_tree
assumes SSA name 'var' but is called like
2496 case BIT_AND_EXPR:
2497 case BIT_IOR_EXPR:
2498 case BIT_XOR_EXPR:
2499 ifcvt_walk_pattern_tree (rhs1, defuse_list, def_stmt);
2500 rhs2 = gimple_assign_rhs2 (def_stmt);
2501 ifcvt_walk_pattern_tree (rhs2, defuse_list, def_stmt);
2502 break;
where obviously at least rhs2 may be a constant. Though the IL looks fishy as
well:
powi_cond_75 = _110 & 1;
powi_81 = powi_cond_75 ? -1.0e+0 : 1.0e+0;
that powi_cond_75 doesn't look like a bool (_110 is int).
"Obvious" patch:
Index: gcc/tree-if-conv.c
===================================================================
--- gcc/tree-if-conv.c (revision 235859)
+++ gcc/tree-if-conv.c (working copy)
@@ -2462,6 +2462,9 @@ ifcvt_walk_pattern_tree (tree var, vec<g
enum tree_code code;
gimple *def_stmt;
+ if (TREE_CODE (var) != SSA_NAME)
+ return;
+
def_stmt = SSA_NAME_DEF_STMT (var);
if (gimple_code (def_stmt) != GIMPLE_ASSIGN)
return;
>From gcc-bugs-return-524320-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 07:39:15 2016
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Subject: [Bug target/70941] [5/6/7 Regression] Test miscompiled with -O2.
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri May 6 07:38:27 2016
New Revision: 235943
URL: https://gcc.gnu.org/viewcvs?rev=235943&root=gcc&view=rev
Log:
2016-05-06 Richard Biener <rguenther@suse.de>
PR middle-end/70941
* fold-const.c (split_tree): Always convert to the original type
before negating.
* gcc.dg/torture/pr70941.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70941.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-524321-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 07:39:45 2016
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Subject: [Bug tree-optimization/70948] [7 Regression] r235622 caused gcc.c-torture/execute/va-arg-pack-1.c execution failure AArch64
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-06
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |7.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will have a look.
>From gcc-bugs-return-524322-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 07:41:58 2016
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Subject: [Bug fortran/70949] Invalid aggregate against pointer comparison
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70949
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-06
Summary|ICE in propagate_necessity, |Invalid aggregate against
|at tree-ssa-dce.c:924 |pointer comparison
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
With checking enabled I get:
c> ../../gcc5-g/gcc/f951 -quiet t.f90 -Os
t.f90:1:0:
program p
^
Error: mismatching comparison operand types
struct __class_p_T1_p
struct t1 *
D.3422 = D.3421 == a;
t.f90:1:0: internal compiler error: verify_gimple failed
0xe6f96a verify_gimple_in_seq(gimple_statement_base*)
/space/rguenther/src/svn/gcc-5-branch/gcc/tree-cfg.c:4739
0xb8e0e1 gimplify_body(tree_node*, bool)
/space/rguenther/src/svn/gcc-5-branch/gcc/gimplify.c:9329
(with GCC 6 and trunk as well). So this is invalid GIMPLE after gimplification
which usually means invalid GENERIC from the Frontend. Here we compare
an aggregate with a pointer - that can't work.
Confirmed as FE issue.
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Subject: [Bug target/70941] [5/6 Regression] Test miscompiled with -O2.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0
Summary|[5/6/7 Regression] Test |[5/6 Regression] Test
|miscompiled with -O2. |miscompiled with -O2.
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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Subject: =?UTF-8?B?W0J1ZyBjLzcwNzQ5XSBlcnJvcjogc3RvcmFnZSBzaXplIG9mIOKAmGHigJkg?= =?UTF-8?B?aXNu4oCZdCBrbm93biBnb2VzIGF3YXkgd2l0aCAtT3M=?Date: Fri, 06 May 2016 07:43:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gerhard.steinmetz.fortran@t
| |-online.de
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 70950 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-524323-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 07:43:09 2016
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Subject: [Bug fortran/70950] ICE with -O0 in simplify_subreg, at simplify-rtx.c:5895
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Same issue.
Error: mismatching comparison operand types
struct __class_p_T1_p
struct t1 *
D.3434 = D.3433 == a.5;
*** This bug has been marked as a duplicate of bug 70749 ***
>From gcc-bugs-return-524326-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 07:44:52 2016
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Subject: [Bug fortran/70931] [4.9/5/6 Regression] ICE with -g in native_encode_initializer, bei dwarf2out.c:17768
Date: Fri, 06 May 2016 07:44:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0
Summary|[4.9/5/6/7 Regression] ICE |[4.9/5/6 Regression] ICE
|with -g in |with -g in
|native_encode_initializer, |native_encode_initializer,
|bei dwarf2out.c:17768 |bei dwarf2out.c:17768
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
>From gcc-bugs-return-524327-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 07:45:20 2016
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Subject: [Bug fortran/70931] [4.9/5/6 Regression] ICE with -g in native_encode_initializer, bei dwarf2out.c:17768
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri May 6 07:44:22 2016
New Revision: 235944
URL: https://gcc.gnu.org/viewcvs?rev=235944&root=gcc&view=rev
Log:
2016-05-06 Richard Biener <rguenther@suse.de>
PR middle-end/70931
* dwarf2out.c (native_encode_initializer): Skip zero-sized fields.
* gfortran.dg/pr70931.f90: New testcase.
Added:
trunk/gcc/testsuite/gfortran.dg/pr70931.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug lto/70955] [6/7 Regression] Wrong code generation for __builtin_ms_va_list with -flto
Date: Fri, 06 May 2016 07:56:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |lto, wrong-code
Priority|P3 |P2
Target Milestone|--- |6.2
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
The change with GCC 6 is that the builtins are now lowered during link-time
optimization rather than at compile-time. Thus the abi selection bits are
possibly not transfered correctly (type merging?). I remember the business
was quite ugly, but eventually we just miss to properly transfer the function
attribute.
Needs more investigation.
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Subject: [Bug tree-optimization/70970] Misaligned SSE with auto-vectorization
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
You are accessing memory via a uint64_t * pointer that is not aligned to
uint64_t but is misaligned by 1 byte.
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Subject: [Bug c++/70972] [6/7 Regression] Inheriting constructors taking parameters by value should move them, not copy
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What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |6.2
>From gcc-bugs-return-524331-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 08:08:31 2016
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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/70964] [7 Regression] internal compiler error: in single_succ_edge, at basic-block.h:351
Date: Fri, 06 May 2016 08:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70964
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|aarch64 |aarch64, x86_64-*-*
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-06
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed on x86_64.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70964] [7 Regression] internal compiler error: in single_succ_edge, at basic-block.h:351
Date: Fri, 06 May 2016 08:09:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
1736 latch_edge = single_succ_edge (get_bb_copy (loop->latch));
the fake edges make loop structure "invalid"
>From gcc-bugs-return-524333-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 08:10:05 2016
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Subject: [Bug tree-optimization/70965] [7 Regression] ICE on released SSA name during IPA SRA
Date: Fri, 06 May 2016 08:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70965
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c++ |tree-optimization
Target Milestone|--- |7.0
Summary|ice in |[7 Regression] ICE on
|useless_type_conversion_p |released SSA name during
| |IPA SRA
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
(gdb) up
#1 0x00000000011f5ac6 in callsite_arguments_match_p (call=
<gimple_call 0x7fffeab3cd10>)
at /space/rguenther/src/svn/trunk/gcc/tree-sra.c:1371
1371 if (!useless_type_conversion_p (TREE_TYPE (parm), TREE_TYPE
(arg)))
(gdb) p debug_tree (arg)
<ssa_name 0x7fffec6bb360 nothrowdef_stmt
version 15 in-free-list>
$3 = void
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Subject: [Bug bootstrap/70969] [7 regression] bootstrap failure: s-unstyp.ads:40:15: violation of No_Elaboration_Code_All at line 42
Date: Fri, 06 May 2016 08:37:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-06
CC| |ebotcazou at gcc dot gnu.org
Target Milestone|--- |7.0
Summary|power64le ada bootstrap |[7 regression] bootstrap
|failure: |failure:
|s-unstyp.ads:40:15: |s-unstyp.ads:40:15:
|violation of |violation of
|No_Elaboration_Code_All at |No_Elaboration_Code_All at
|line 42 |line 42
Ever confirmed|0 |1
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Right, the pragma is missing for 8 files:
system-darwin-ppc64.ads
system-linux-armeb.ads
system-linux-mips64el.ads
system-linux-mips.ads
system-linux-mipsel.ads
system-linux-ppc64.ads
system-linux-sparcv9.ads
system-rtems.ads
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Subject: [Bug bootstrap/70969] [7 regression] bootstrap failure: s-unstyp.ads:40:15: violation of No_Elaboration_Code_All at line 42
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |ebotcazou at gcc dot gnu.org
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixing.
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Subject: [Bug ada/70969] [7 regression] bootstrap failure: s-unstyp.ads:40:15: violation of No_Elaboration_Code_All at line 42
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri May 6 09:11:38 2016
New Revision: 235946
URL: https://gcc.gnu.org/viewcvs?rev=235946&root=gcc&view=rev
Log:
PR ada/70969
* system-darwin-ppc64.ads: Add pragma No_Elaboration_Code_All.
* system-linux-armeb.ads: Likewise.
* system-linux-mips64el.ads: Likewise.
* system-linux-mips.ads: Likewise.
* system-linux-mipsel.ads: Likewise.
* system-linux-ppc64.ads: Likewise.
* system-linux-sparcv9.ads: Likewise.
* system-rtems.ads: Likewise.
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/system-darwin-ppc64.ads
trunk/gcc/ada/system-linux-armeb.ads
trunk/gcc/ada/system-linux-mips.ads
trunk/gcc/ada/system-linux-mips64el.ads
trunk/gcc/ada/system-linux-mipsel.ads
trunk/gcc/ada/system-linux-ppc64.ads
trunk/gcc/ada/system-linux-sparcv9.ads
trunk/gcc/ada/system-rtems.ads
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Subject: [Bug ada/70969] [7 regression] bootstrap failure: s-unstyp.ads:40:15: violation of No_Elaboration_Code_All at line 42
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--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri May 6 09:11:56 2016
New Revision: 235947
URL: https://gcc.gnu.org/viewcvs?rev=235947&root=gcc&view=rev
Log:
PR ada/70969
* system-darwin-ppc64.ads: Add pragma No_Elaboration_Code_All.
* system-linux-armeb.ads: Likewise.
* system-linux-mips64el.ads: Likewise.
* system-linux-mips.ads: Likewise.
* system-linux-mipsel.ads: Likewise.
* system-linux-ppc64.ads: Likewise.
* system-linux-sparcv9.ads: Likewise.
* system-rtems.ads: Likewise.
Modified:
branches/gcc-6-branch/gcc/ada/ChangeLog
branches/gcc-6-branch/gcc/ada/system-darwin-ppc64.ads
branches/gcc-6-branch/gcc/ada/system-linux-armeb.ads
branches/gcc-6-branch/gcc/ada/system-linux-mips.ads
branches/gcc-6-branch/gcc/ada/system-linux-mips64el.ads
branches/gcc-6-branch/gcc/ada/system-linux-mipsel.ads
branches/gcc-6-branch/gcc/ada/system-linux-ppc64.ads
branches/gcc-6-branch/gcc/ada/system-linux-sparcv9.ads
branches/gcc-6-branch/gcc/ada/system-rtems.ads
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Subject: [Bug ada/70969] [7 regression] bootstrap failure: s-unstyp.ads:40:15: violation of No_Elaboration_Code_All at line 42
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--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri May 6 09:12:09 2016
New Revision: 235948
URL: https://gcc.gnu.org/viewcvs?rev=235948&root=gcc&view=rev
Log:
PR ada/70969
* system-darwin-ppc64.ads: Add pragma No_Elaboration_Code_All.
* system-linux-armeb.ads: Likewise.
* system-linux-mips64el.ads: Likewise.
* system-linux-mips.ads: Likewise.
* system-linux-mipsel.ads: Likewise.
* system-linux-ppc64.ads: Likewise.
* system-linux-sparcv9.ads: Likewise.
* system-rtems.ads: Likewise.
Modified:
branches/gcc-5-branch/gcc/ada/ChangeLog
branches/gcc-5-branch/gcc/ada/system-darwin-ppc64.ads
branches/gcc-5-branch/gcc/ada/system-linux-armeb.ads
branches/gcc-5-branch/gcc/ada/system-linux-mips.ads
branches/gcc-5-branch/gcc/ada/system-linux-mips64el.ads
branches/gcc-5-branch/gcc/ada/system-linux-mipsel.ads
branches/gcc-5-branch/gcc/ada/system-linux-ppc64.ads
branches/gcc-5-branch/gcc/ada/system-linux-sparcv9.ads
branches/gcc-5-branch/gcc/ada/system-rtems.ads
>From gcc-bugs-return-524339-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 09:13:29 2016
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Subject: [Bug ada/70969] [7 regression] bootstrap failure: s-unstyp.ads:40:15: violation of No_Elaboration_Code_All at line 42
Date: Fri, 06 May 2016 09:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70969
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
This should work again.
>From gcc-bugs-return-524340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 09:17:18 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70904] ICE: Max. number of generated reload insns per insn is achieved (90) with -fno-split-wide-types @ aarch64
Date: Fri, 06 May 2016 09:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70904
Jiong Wang <jiwang at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-06
CC| |jiwang at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jiwang at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jiong Wang <jiwang at gcc dot gnu.org> ---
Confirmed, I will have a look.
>From gcc-bugs-return-524341-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 09:30:16 2016
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
For gfortran.dg/array_constructor_type_7.f03 the difference is
@@ -13,6 +13,7 @@
bitsizetype D.3466;
sizetype D.3467;
+ typedef character(kind=1) struct
character(kind=1)[1:2][1:.arr][1:2][1:.arr];
D.3462 = (bitsizetype) (sizetype) _s * 8;
D.3463 = (sizetype) _s;
D.3464 = (bitsizetype) (sizetype) _a1 * 8;
which results in
try
{
D.3477 = D.3458;
D.3478 = D.3477 * 2;
D.3479 = D.3459;
...
.arr = MAX_EXPR <_9, 0>;
_10 = (sizetype) .arr;
_11 = (bitsizetype) _10;
D.3458 = _11 * 8;
and thus an uninitialized use of D.3458.
Note there _is_ already a decl expr, but it looks like
stmt <decl_expr 0x7ffff6a4eb60 type <array_type 0x7ffff6a4b498>
side-effects arg 0 <var_decl 0x7ffff7ff6a20 arr>
so it is for a VAR_DECL. It looks like the Fortran FE "gimplifes" type
sizes on its own (in some cases at least). The above is built here:
void
gfc_trans_auto_array_allocation (tree decl, gfc_symbol * sym,
gfc_wrapped_block * block)
{
...
/* Evaluate character string length. */
if (sym->ts.type == BT_CHARACTER
&& onstack && !INTEGER_CST_P (sym->ts.u.cl->backend_decl))
{
gfc_conv_string_length (sym->ts.u.cl, NULL, &init);
gfc_trans_vla_type_sizes (sym, &init);
/* Emit a DECL_EXPR for this variable, which will cause the
gimplifier to allocate storage, and all that good stuff. */
tmp = fold_build1_loc (input_location, DECL_EXPR, TREE_TYPE (decl),
decl);
gfc_add_expr_to_block (&init, tmp);
and gfc_trans_vla_type_sizes has the interesting comment:
/* Make sure all type sizes and array domains are either constant,
or variable or parameter decls. This is a simplified variant
of gimplify_type_sizes, but we can't use it here, as none of the
variables in the expressions have been gimplified yet.
As type sizes and domains for various variable length arrays
contain VAR_DECLs that are only initialized at gfc_trans_deferred_vars
time, without this routine gimplify_type_sizes in the middle-end
could result in the type sizes being gimplified earlier than where
those variables are initialized. */
void
gfc_trans_vla_type_sizes (gfc_symbol *sym, stmtblock_t *body)
This code was added by Jakub ten years ago.
I can fix the wrong-code regressions by restricting place_decl_expr to work
on pointer types. But all this looks like the wrong way to fix the FE
issue of missing DECL_EXPRs for some of its "anonymous" types it generates.
But the above FE "gimplification" code suggests that it is wrong if the
gimplifier ever sees non-gimplified type sizes.
In this case the FE generated
{
integer(kind=8) D.3445;
D.3445 = args->dim[0].stride;
stride.1 = D.3445 != 0 ? D.3445 : 1;
args.0 = (character(kind=1)[0:D.3448][1:_args] * restrict) args->data;
ubound.0 = (args->dim[0].ubound - args->dim[0].lbound) + 1;
size.3 = stride.1 * ubound.0;
offset.2 = -stride.1;
D.3446 = (bitsizetype) (sizetype) _args * 8;
which is gimplified to
_4 = (sizetype) _args;
_5 = (bitsizetype) _4;
D.3446 = _5 * 8;
but the expression (sizetype) _args was also used in the TYPE_DECLs
array type TYPE_SIZE
SAVE_EXPR <((bitsizetype) _4 * (bitsizetype) (sizetype) ubound.0) * 8>
which the FE "gimplification" doesn't adjust.
The type we end up "gimplifying" is the one built by gfc_build_qualified_array.
They are connected via TYPE_NAME (but they do not share sizes, they even
use differently named decls):
SAVE_EXPR <((bitsizetype) (sizetype) _args * (bitsizetype) (sizetype) ubound.0)
* 8>
SAVE_EXPR <((bitsizetype) (sizetype) _args * (bitsizetype) (sizetype) size.3) *
8>
So the following patch also fixes this PR.
Index: gcc/fortran/trans-decl.c
===================================================================
--- gcc/fortran/trans-decl.c (revision 235945)
+++ gcc/fortran/trans-decl.c (working copy)
@@ -3818,6 +3818,9 @@ gfc_trans_vla_type_sizes (gfc_symbol *sy
}
gfc_trans_vla_type_sizes_1 (type, body);
+ if (TYPE_NAME (type)
+ && TREE_TYPE (TYPE_NAME (type)) != type)
+ gfc_trans_vla_type_sizes_1 (TREE_TYPE (TYPE_NAME (type)), body);
}
or the following, only making sure to get the unsharing correct.
Index: gcc/fortran/trans-decl.c
===================================================================
--- gcc/fortran/trans-decl.c (revision 235945)
+++ gcc/fortran/trans-decl.c (working copy)
@@ -3818,6 +3818,11 @@ gfc_trans_vla_type_sizes (gfc_symbol *sy
}
gfc_trans_vla_type_sizes_1 (type, body);
+ /* gfc_build_qualified_array may have built this type but left TYPE_NAME
+ pointing to the original type whose type sizes we need to expose to
+ the gimplifier unsharing. */
+ if (TYPE_NAME (type))
+ gfc_add_expr_to_block (body, build1 (DECL_EXPR, type, TYPE_NAME (type)));
}
the last one I am testing now.
>From gcc-bugs-return-524342-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 09:31:44 2016
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From: "y.gribov at samsung dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/69443] -fsanitizedress should add -lpthread to linker call
Date: Fri, 06 May 2016 09:31:00 -0000
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Yury Gribov <y.gribov at samsung dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |y.gribov at samsung dot com
--- Comment #2 from Yury Gribov <y.gribov at samsung dot com> ---
(In reply to Jakub Jelinek from comment #1)
> I'm afraid it is undesirable, various projects flag ldd -u diagnosed
> dependencies as errors. Perhaps just configure without -fsanitize=address
> in CFLAGS and only add those for the actual builds?
We could prefix -lpthread with -Wl,--as-needed to work around this.
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Subject: [Bug target/54089] [SH] Refactor shift patterns
Date: Fri, 06 May 2016 09:42:00 -0000
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--- Comment #45 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Fri May 6 09:41:57 2016
New Revision: 235950
URL: https://gcc.gnu.org/viewcvs?rev=235950&root=gcc&view=rev
Log:
gcc/
PR target/54089
* config/sh/sh.md (*rotcr): Add another variant.
gcc/testsuite/
PR target/54089
* gcc.target/sh/pr54089-1.c (test_24): Add new sub-test.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sh/sh.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/sh/pr54089-1.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/70875] ICE in get_ubsan_type_info_for_type with -fsanitize=undefined
Date: Fri, 06 May 2016 09:48:00 -0000
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri May 6 09:47:25 2016
New Revision: 235951
URL: https://gcc.gnu.org/viewcvs?rev=235951&root=gcc&view=rev
Log:
PR sanitizer/70875
* ubsan.c (get_ubsan_type_info_for_type): Remove assert.
* gcc.dg/ubsan/bounds-3.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/ubsan/bounds-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/ubsan.c
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Subject: [Bug target/52933] SH Target: Use div0s for integer sign comparisons
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--- Comment #8 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Fri May 6 09:52:35 2016
New Revision: 235952
URL: https://gcc.gnu.org/viewcvs?rev=235952&root=gcc&view=rev
Log:
gcc/
PR target/52933
* config/sh/sh.md (*cmp_div0s_7, *cmp_div0s_8): Add div0s variants.
* config/sh/sh.c (sh_rtx_costs): Add another div0s case.
gcc/testsuite/
PR target/52933
* gcc.target/sh/pr52933-1.c (test_31, test_32, test_33, test_34,
test_35, test_36, test_37, test_38, test_39, test_40): New sub-tests.
Adjust expected instruction counts.
* gcc.target/sh/pr52933-2.c: Adjust expected instruction counts.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sh/sh.c
trunk/gcc/config/sh/sh.md
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/sh/pr52933-1.c
trunk/gcc/testsuite/gcc.target/sh/pr52933-2.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70973] New: x86: Can the __atomic_*() operations be made to list the LOCK prefixes?
Date: Fri, 06 May 2016 09:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70973
Bug ID: 70973
Summary: x86: Can the __atomic_*() operations be made to list
the LOCK prefixes?
Product: gcc
Version: 6.0
Status: UNCONFIRMED
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When generating x86 code, the Linux kernel constructs a list of the LOCK
prefixes it applies to inline assembly-coded atomic operations. This allows
the LOCK prefixes to be NOP'd out if there's only one CPU online.
Would it be possible to duplicate this in gcc?
What the kernel does is this:
#ifdef CONFIG_SMP
#define LOCK_PREFIX_HERE \
".pushsection .smp_locks,\"a\"\n" \
".balign 4\n" \
".long 671f - .\n" /* offset */ \
".popsection\n" \
"671:"
#define LOCK_PREFIX LOCK_PREFIX_HERE "\n\tlock; "
#else /* ! CONFIG_SMP */
#define LOCK_PREFIX_HERE ""
#define LOCK_PREFIX ""
#endif
placing a 32-bit relative pointer in the .smp_locks section (we're assuming
that .smp_locks isn't going to be more than 2G away from the .text section).
Note, however, some LOCK prefixes apparently cannot be dispensed with, so the
listing cannot be unconditional via a command-line flag.
Would it be possible to provide a constant to OR with the memorder parameter to
flag that this atomic op should be listed in .smp_locks? E.g.:
orig = __atomic_fetch_or(ptr, mask, __ATOMIC_ACQUIRE |
__ATOMIC_RECORD_LOCK);
This might also be useful in userspace. So, for example, pthread
initialisation could replace a bunch of NOPs with a bunch of LOCKs so that
single-threaded processes don't get a performance penalty from LOCKed
instructions.
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Subject: [Bug target/70973] x86: Can the __atomic_*() operations be made to list the LOCK prefixes?
Date: Fri, 06 May 2016 10:01:00 -0000
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--- Comment #1 from dhowells at redhat dot com <dhowells at redhat dot com> ---
There may be space that can be used in the memorder parameter:
"The memory order parameter is a signed int, but only the lower 16 bits are
reserved for the memory order. The remainder of the signed int is reserved for
target use and should be 0. Use of the predefined atomic values ensures proper
usage."
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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/70948] [7 Regression] r235622 caused gcc.c-torture/execute/va-arg-pack-1.c execution failure AArch64
Date: Fri, 06 May 2016 10:02:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I don't have an arm execution environment so maybe you can help me
reducing/analyzing this a bit.
The two places the optimization happens on are during PRE in foo1:
Visiting control stmt ending BB 34: if (v_23 != &v4)
Applying pattern match.pd:2408, gimple-match.c:1275
Marking all edges out of BB 34 but (34 -> 76) as not executable
and in foo2:
Visiting control stmt ending BB 34: if (v_23 != &v2)
Applying pattern match.pd:2408, gimple-match.c:1275
Marking all edges out of BB 34 but (34 -> 52) as not executable
v_23 is found to point to nothing in both cases (PRE re-runs PTA here).
Relevant constraints:
_154 = &NONLOCAL
_155 = _154 + UNKNOWN
_156 = _155
ap.0+64 = _156
_159 = ap.64+64
iftmp.35_161 = _159 + UNKNOWN
v_23 = *iftmp.35_161
There are no assigns to ap.64+64 (&ap at offset 64 bits, 64 bits size).
The issue is that
<bb 2>:
# USE = nonlocal escaped
# CLB = nonlocal escaped { D.2770 } (escaped)
__builtin_va_start (&ap, 0);
results in
ap.0+64 = &NONLOCAL
CALLCLOBBERED(15) = &ap.0+64
but fails to "clobber" all other fields.
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Subject: [Bug tree-optimization/70948] [7 Regression] r235622 caused gcc.c-torture/execute/va-arg-pack-1.c execution failure AArch64
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The following should fix it, I am going to test it on x86_64:
Index: gcc/tree-ssa-structalias.c
===================================================================
--- gcc/tree-ssa-structalias.c (revision 235945)
+++ gcc/tree-ssa-structalias.c (working copy)
@@ -4492,7 +4492,7 @@ find_func_aliases_for_builtin_call (stru
tree valist = gimple_call_arg (t, 0);
struct constraint_expr rhs, *lhsp;
unsigned i;
- get_constraint_for (valist, &lhsc);
+ get_constraint_for_ptr_offset (valist, NULL_TREE, &lhsc);
do_deref (&lhsc);
/* The va_list gets access to pointers in variadic
arguments. Which we know in the case of IPA analysis
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Subject: [Bug tree-optimization/70960] [7 Regression] ICE: tree check: expected ssa_name, have integer_cst in ifcvt_walk_pattern_tree, at tree-if-conv.c:2465
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/70960] [7 Regression] ICE: tree check: expected ssa_name, have integer_cst in ifcvt_walk_pattern_tree, at tree-if-conv.c:2465
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri May 6 10:18:59 2016
New Revision: 235953
URL: https://gcc.gnu.org/viewcvs?rev=235953&root=gcc&view=rev
Log:
2016-05-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/70960
* tree-if-conv.c (ifcvt_walk_pattern_tree): Handle non-SSA ops.
* gfortran.fortran-torture/compile/pr70960.f90: New testcase.
Added:
trunk/gcc/testsuite/gfortran.fortran-torture/compile/pr70960.f90
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-if-conv.c
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Subject: [Bug target/58219] [SH] mov.l insn length is wrong on SH2A
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--- Comment #2 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Author: olegendo
Date: Fri May 6 10:20:13 2016
New Revision: 235954
URL: https://gcc.gnu.org/viewcvs?rev=235954&root=gcc&view=rev
Log:
gcc/
PR target/58219
* config/sh/predicates.md (long_displacement_mem_operand): New.
* config/sh/sh.md (movsi_i): Allow for SH2A, disallow for any FPU.
Add movi20, movi20s alternatives. Adjust length attribute for
alternatives.
(movsi_ie): Allow for any FPU. Adjust length attribute for
alternatives.
(movsi_i_lowpart): Add movi20, movi20s alternatives. Adjust length
attribute for alternatives.
(*mov<mode>): Use long_displacement_mem_operand for length attribute.
(*movdi_i, movdf_k, movdf_i4, movsf_i, movsf_ie, movsf_ie_ra): Adjust
length attribute for alternatives.
gcc/testsuite/
PR target/58219
*gcc.target/sh/pr58219.c: New tests.
Added:
trunk/gcc/testsuite/gcc.target/sh/pr58219.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sh/predicates.md
trunk/gcc/config/sh/sh.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/70948] [7 Regression] r235622 caused gcc.c-torture/execute/va-arg-pack-1.c execution failure AArch64
Date: Fri, 06 May 2016 10:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70948
--- Comment #4 from Jiong Wang <jiwang at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> The following should fix it, I am going to test it on x86_64:
>
> Index: gcc/tree-ssa-structalias.c
> ===================================================================
> --- gcc/tree-ssa-structalias.c (revision 235945)
> +++ gcc/tree-ssa-structalias.c (working copy)
> @@ -4492,7 +4492,7 @@ find_func_aliases_for_builtin_call (stru
> tree valist = gimple_call_arg (t, 0);
> struct constraint_expr rhs, *lhsp;
> unsigned i;
> - get_constraint_for (valist, &lhsc);
> + get_constraint_for_ptr_offset (valist, NULL_TREE, &lhsc);
> do_deref (&lhsc);
> /* The va_list gets access to pointers in variadic
> arguments. Which we know in the case of IPA analysis
Thanks. This patch fixed all regressions on my native test.
>From gcc-bugs-return-524354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 10:38:56 2016
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From: "noloader at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70974] New: armv8-a+crc does not define __ARM_ACLE
Date: Fri, 06 May 2016 10:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70974
Bug ID: 70974
Summary: armv8-a+crc does not define __ARM_ACLE
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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I'm working with a HiKey dev board. It provides AArch64.
I'm trying to compile a simple program:
$ cat test.cxx
#if (defined(__ARM_NEON__) || defined(__ARM_NEON))
# define NEON_INTRINSICS_AVAILABLE 1
#else
# define NEON_INTRINSICS_AVAILABLE 0
#endif
#if BOOL_NEON_INTRINSICS_AVAILABLE
# include <arm_neon.h>
# if (__ARM_ACLE >= 200)
# include <arm_acle.h>
# endif
#endif
#include <stdint.h>
int main(int argc, char* argv[])
{
uint32_t crc = 0;
crc = __crc32b(crc, (uint8_t)0);
return 0
}
Compiling the program results in:
$ g++ -march=armv8-a+crc test.cxx -o test.exe
test.cxx: In function ‘int main(int, char**)’:
test.cxx:19:33: error: ‘__crc32b’ was not declared in this scope
crc = __crc32b(crc, (uint8_t)0);
^
test.cxx:22:1: error: expected ‘;’ before ‘}’ token
}
^
According to "ARM® C Language Extensions Release 2.0"
(http://infocenter.arm.com/help/topic/com.arm.doc.ihi0053c/IHI0053C_acle_2_0.pdf),
it looks like GCC is failing to define the necessary preprocessor macros. For
the CRC32 gear, it looks like GCC needs to -D__ARM_ACLE=200.
Also, I'm using GCC 4.9, so __has_include(x) is not available to me.
----------
$ g++ -march=armv8-a+crc -dM -E - </dev/null | egrep -i '(arm|neon|aarch)'
#define __AARCH64_CMODEL_SMALL__ 1
#define __aarch64__ 1
#define __AARCH64EL__ 1
#define __ARM_FEATURE_CRC32 1
#define __ARM_NEON 1
And:
$ clang++ -march=armv8-a+crc -dM -E - </dev/null | egrep -i '(arm|neon|aarch)'
#define __AARCH64EL__ 1
#define __ARM_64BIT_STATE 1
#define __ARM_ACLE 200
#define __ARM_ALIGN_MAX_STACK_PWR 4
#define __ARM_ARCH 8
#define __ARM_ARCH_ISA_A64 1
#define __ARM_ARCH_PROFILE 'A'
#define __ARM_FEATURE_CLZ 1
#define __ARM_FEATURE_CRC32 1
#define __ARM_FEATURE_DIV 1
#define __ARM_FEATURE_FMA 1
#define __ARM_FEATURE_UNALIGNED 1
#define __ARM_FP 0xe
#define __ARM_FP16_FORMAT_IEEE 1
#define __ARM_FP_FENV_ROUNDING 1
#define __ARM_NEON 1
#define __ARM_NEON_FP 0xe
#define __ARM_PCS_AAPCS64 1
#define __ARM_SIZEOF_MINIMAL_ENUM 4
#define __ARM_SIZEOF_WCHAR_T 4
#define __aarch64__ 1
-----
$ gcc --version
gcc (Debian/Linaro 4.9.2-10) 4.9.2
$ clang --version
Debian clang version 3.5.0-10 (tags/RELEASE_350/final) (based on LLVM 3.5.0)
Target: aarch64-unknown-linux-gnu
Thread model: posix
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Subject: [Bug sanitizer/70342] g++ -fsanitize=undefined never finishes compiling (>24h) in qtxmlpatterns test suite
Date: Fri, 06 May 2016 10:50:00 -0000
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--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri May 6 10:50:03 2016
New Revision: 235958
URL: https://gcc.gnu.org/viewcvs?rev=235958&root=gcc&view=rev
Log:
PR sanitizer/70342
* fold-const.c (tree_single_nonzero_warnv_p): For TARGET_EXPR, use
TARGET_EXPR_SLOT as a base.
* g++.dg/ubsan/null-7.C: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/ubsan/null-7.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 sanitizer/70875] ICE in get_ubsan_type_info_for_type with -fsanitize=undefined
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Fri May 6 10:54:12 2016
New Revision: 235959
URL: https://gcc.gnu.org/viewcvs?rev=235959&root=gcc&view=rev
Log:
PR sanitizer/70875
* ubsan.c (get_ubsan_type_info_for_type): Remove assert.
* gcc.dg/ubsan/bounds-3.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/ubsan/bounds-3.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/ubsan.c
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Subject: [Bug sanitizer/70875] ICE in get_ubsan_type_info_for_type with -fsanitize=undefined
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70875
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed for GCC 6 / 7.
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Subject: [Bug sanitizer/70342] g++ -fsanitize=undefined never finishes compiling (>24h) in qtxmlpatterns test suite
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #12 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed for GCC 6 / 7.
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--- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
With the second patch in comment 9 applied on top of my working tree (heavily
patched), I get
[Book15] f90/bug% gfc
/opt/gcc/_clean/gcc/testsuite/gfortran.dg/allocatable_function_4.f90
-fdump-tree-original
/opt/gcc/_clean/gcc/testsuite/gfortran.dg/allocatable_function_4.f90:52:0:
end function unique_A
internal compiler error: tree check: expected tree that contains 'decl common'
structure, have 'identifier_node' in print_declaration, at
tree-pretty-print.c:3287
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--- Comment #11 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 6 May 2016, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70937
>
> --- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> With the second patch in comment 9 applied on top of my working tree (heavily
> patched), I get
>
> [Book15] f90/bug% gfc
> /opt/gcc/_clean/gcc/testsuite/gfortran.dg/allocatable_function_4.f90
> -fdump-tree-original
> /opt/gcc/_clean/gcc/testsuite/gfortran.dg/allocatable_function_4.f90:52:0:
>
> end function unique_A
>
> internal compiler error: tree check: expected tree that contains 'decl common'
> structure, have 'identifier_node' in print_declaration, at
> tree-pretty-print.c:3287
Which means TYPE_NAME is an IDENTIFIER_NODE here.
Index: gcc/fortran/trans-decl.c
===================================================================
--- gcc/fortran/trans-decl.c (revision 235945)
+++ gcc/fortran/trans-decl.c (working copy)
@@ -3818,6 +3818,12 @@ gfc_trans_vla_type_sizes (gfc_symbol *sy
}
gfc_trans_vla_type_sizes_1 (type, body);
+ /* gfc_build_qualified_array may have built this type but left
TYPE_NAME
+ pointing to the original type whose type sizes we need to expose to
+ the gimplifier unsharing. */
+ if (TYPE_NAME (type)
+ && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
+ gfc_add_expr_to_block (body, build1 (DECL_EXPR, type, TYPE_NAME
(type)));
}
fixes this. I'm going to re-test with that change, will not be able
to commit before Monday.
>From gcc-bugs-return-524362-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 11:33:52 2016
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From: "wdijkstr at arm dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/70961] Regrename ignores preferred_rename_class
Date: Fri, 06 May 2016 11:33:00 -0000
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--- Comment #3 from Wilco <wdijkstr at arm dot com> ---
(In reply to Eric Botcazou from comment #2)
> Pass #2 ignores it since the preference simply couldn't be honored.
In which case it should not rename that chain rather than just ignore the
preference (and a preference of NO_REGS should probably also block renaming).
> > The super_class has nothing to do with the class that is searched for
> > renaming registers though, it's just the info passed to the back-end to
> > compute this class. For example, on the ARM, the preferred_class will be
> > LO_REGS for any chain of GENERAL_REGS.
Actually for a chain of GENERAL_REGS the preferred class should be GENERAL_REGS
- using LO_REGS in that case would be counterproductive. You'd prefer LO_REGS
only when *some* of the patterns in a chain are LO_REGS. But since the callback
only ever sees the union of all classes in a chain, I don't think could make
the correct decision.
> As a matter of fact, that might not be true, something like
>
> + if (TARGET_THUMB2 && reg_class_subset_p (rclass, GENERAL_REGS))
> return LO_REGS;
I tried something similar, as well as always returning LO_REGS or NO_REGS, but
this makes no difference at all due to pass 2 ignoring the preference...
>From gcc-bugs-return-524361-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 11:33:19 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70964] [7 Regression] internal compiler error: in single_succ_edge, at basic-block.h:351
Date: Fri, 06 May 2016 11:33:00 -0000
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--- Comment #3 from ktkachov at gcc dot gnu.org ---
Another testcase that started ICEing with r235842.
int a, b;
int
fn1 (int p1)
{
return p1 < 0 ? p1 : a;
}
void
fn2 ()
{
lbl_100:
b = 1;
for (; b != 21; b = fn1 (b))
;
goto lbl_100;
}
with -Ofast with a different backtrace:
ice.c:9:1: internal compiler error: in combine_blocks, at tree-if-conv.c:2219
fn2 ()
^~~
0xb49a15 combine_blocks
$SRC/gcc/tree-if-conv.c:2219
0xb4b17b tree_if_conversion
$SRC/gcc/tree-if-conv.c:2741
0xb4b17b execute
$SRC/gcc/tree-if-conv.c:2829
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.
>From gcc-bugs-return-524363-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 11:39:22 2016
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Subject: [Bug libstdc++/70975] New: experimental/filesystem/operations/copy.cc FAILs on Solaris 12
Date: Fri, 06 May 2016 11:39:00 -0000
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Bug ID: 70975
Summary: experimental/filesystem/operations/copy.cc FAILs on
Solaris 12
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
Host: *-*-solaris2.12
Target: *-*-solaris2.12
Build: *-*-solaris2.12
The experimental/filesystem/operations/copy.cc testcase FAILs on Solaris 12:
FAIL: experimental/filesystem/operations/copy.cc execution test
Unfortunately, the gdb stack trace is completely misleading, but dbx reveals
signal SEGV (no mapping at the fault address) in sendfile at 0xfdf0e533
0xfdf0e533: sendfile+0x0023: movl (%esi),%eax
Current function is do_copy_file
429 const auto n = ::sendfile(out.fd, in.fd, nullptr,
from_st->st_size);
[1] sendfile(0x4, 0x3, 0x0, 0x0), at 0xfdf0e533
=>[2] do_copy_file(from = CLASS, to = CLASS, option = copy_options::none,
from_st = 0xfeffd628, to_st = (nil), ec = STRUCT), line 429 in "ops.cc"
[3] std::experimental::filesystem::v1::copy(from = CLASS, to = CLASS, options
= copy_options::none, ec = STRUCT), line 540 in "ops.cc"
[4] std::experimental::filesystem::v1::copy(from = CLASS, to = CLASS, options
= copy_options::none), line 232 in "ops.cc"
[5] std::experimental::filesystem::v1::copy(__from = CLASS, __to = CLASS),
line 62 in "fs_ops.h"
[6] test03(), line 109 in "copy.cc"
[7] main(), line 152 in "copy.cc"
Looking at the source reveals what's the problem:
#ifdef _GLIBCXX_USE_SENDFILE
const auto n = ::sendfile(out.fd, in.fd, nullptr, from_st->st_size);
sendfile is called with off = nullptr. While this is supported on Linux,
Solaris unconditionally dereferences off as can be seen in the OpenSolaris
libsendfile sources.
AFAICT, sendfile is not in XPG7, so it's unclear what the ultimate
specification
is.
Solaris 10 and 11 are not affected since sendfile() only lives in libsendfile,
while it has been folded into libc in Solaris 12.
Rainer
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Subject: [Bug libstdc++/70975] experimental/filesystem/operations/copy.cc FAILs on Solaris 12
Date: Fri, 06 May 2016 11:39:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
>From gcc-bugs-return-524365-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 11:47:15 2016
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Subject: [Bug rtl-optimization/70976] New: Useless vectorization leads to degradation of performance
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Bug ID: 70976
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performance
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See the following code:
#include <stdio.h>
int main()
{
unsigned long u = 13;
for(unsigned long i = 0; i < 1UL<<30; i++)
u += 23442*u;
if (u == 0) printf("0\n");
}
Compiling it on an AMD64 system with -O2, I get normal assembly for the loop:
.L2:
imul rdx, rdx, 23443
sub rax, 1
jne .L2
But if I use -O3, the loop looks like this:
.L2:
movdqa xmm3, xmm1
add eax, 1
movdqa xmm0, xmm1
pmuludq xmm1, xmm4
cmp eax, 536870912
pmuludq xmm3, xmm2
psrlq xmm0, 32
pmuludq xmm0, xmm2
paddq xmm0, xmm1
movdqa xmm1, xmm3
psllq xmm0, 32
paddq xmm1, xmm0
jne .L2
Not only does it become longer, but also it needlessly does calculations on
pairs of identical numbers. On my CPU (Intel(R) Xeon(R) CPU E3-1226 v3 @
3.30GHz) the -O2 version is almost two times faster than -O3 one.
This happens with gcc 4.7.3 and newer, but doesn't with 4.6.4 and older.
>From gcc-bugs-return-524366-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 11:59:24 2016
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From: "aleksandergajewski at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70977] New: Error during compilation of facebook/wangle (flag c++0x works, flag c++14 fails).
Date: Fri, 06 May 2016 11:59:00 -0000
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Bug ID: 70977
Summary: Error during compilation of facebook/wangle (flag
c++0x works, flag c++14 fails).
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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GCC version as follows: (nothing but svn checkout release_6_1.. && ./configure
--prefix=/usr && make && make install):
adiog@box:~/dev/wangle/build-6.1$ c++ --version
c++ (GCC) 6.1.0
Copyright (C) 2016 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.
The problem should be easy to reproduce (compilation fails on first file in a
project). I have compiled https://github.com/facebook/wangle, but with changed
flag from -std=c++0x to -std=c++14. In first case compilation terminates after
few seconds, in second one there is a gcc internal error (after few minutes
with whole ram 4gb and whole swap consumed). htop does not show any cpu usage.
adiog@box:~/dev/wangle/build-6.1$ time /usr/bin/c++
-I/home/adiog/dev/wangle/.. -I/usr/local/include
-I/home/adiog/dev/wangle/gmock/src/gmock/include
-I/home/adiog/dev/wangle/gmock/src/gmock/gtest/include -std=c++0x -fPIC -o
CMakeFiles/wangle.dir/acceptor/Acceptor.cpp.o -c
/home/adiog/dev/wangle/acceptor/Acceptor.cpp
real 0m6.311s
user 0m6.036s
sys 0m0.256s
adiog@box:~/dev/wangle/build-6.1$ time /usr/bin/c++
-I/home/adiog/dev/wangle/.. -I/usr/local/include
-I/home/adiog/dev/wangle/gmock/src/gmock/include
-I/home/adiog/dev/wangle/gmock/src/gmock/gtest/include -std=c++14 -fPIC -o
CMakeFiles/wangle.dir/acceptor/Acceptor.cpp.o -c
/home/adiog/dev/wangle/acceptor/Acceptor.cpp
c++: internal compiler error: Killed (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
real 3m41.641s
user 1m5.628s
sys 0m5.684s
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Subject: =?UTF-8?B?W0J1ZyBmb3J0cmFuLzcwOTM3XSBbNyBSZWdyZXNzaW9uXSBJQ0U6IHRyZWUg?= =?UTF-8?B?Y29kZSDigJhzc2FfbmFtZeKAmSBpcyBub3Qgc3VwcG9ydGVkIGluIExUTyBz?= =?UTF-8?B?dHJlYW1z?Date: Fri, 06 May 2016 12:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70937
--- Comment #12 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 6 May 2016, Richard Biener wrote:
> On Fri, 6 May 2016, dominiq at lps dot ens.fr wrote:
>
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70937
> >
> > --- Comment #10 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > With the second patch in comment 9 applied on top of my working tree (heavily
> > patched), I get
> >
> > [Book15] f90/bug% gfc
> > /opt/gcc/_clean/gcc/testsuite/gfortran.dg/allocatable_function_4.f90
> > -fdump-tree-original
> > /opt/gcc/_clean/gcc/testsuite/gfortran.dg/allocatable_function_4.f90:52:0:
> >
> > end function unique_A
> >
> > internal compiler error: tree check: expected tree that contains 'decl common'
> > structure, have 'identifier_node' in print_declaration, at
> > tree-pretty-print.c:3287
>
> Which means TYPE_NAME is an IDENTIFIER_NODE here.
>
> Index: gcc/fortran/trans-decl.c
> ===================================================================
> --- gcc/fortran/trans-decl.c (revision 235945)
> +++ gcc/fortran/trans-decl.c (working copy)
> @@ -3818,6 +3818,12 @@ gfc_trans_vla_type_sizes (gfc_symbol *sy
> }
>
> gfc_trans_vla_type_sizes_1 (type, body);
> + /* gfc_build_qualified_array may have built this type but left
> TYPE_NAME
> + pointing to the original type whose type sizes we need to expose to
> + the gimplifier unsharing. */
> + if (TYPE_NAME (type)
> + && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
> + gfc_add_expr_to_block (body, build1 (DECL_EXPR, type, TYPE_NAME
> (type)));
> }
>
>
>
> fixes this. I'm going to re-test with that change, will not be able
> to commit before Monday.
Interestingly even with that I still at least get
FAIL: libgomp.fortran/vla7.f90 -O0 execution test
FAIL: libgomp.fortran/vla7.f90 -O1 execution test
FAIL: libgomp.fortran/vla7.f90 -O2 execution test
FAIL: libgomp.fortran/vla7.f90 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions execution test
FAIL: libgomp.fortran/vla7.f90 -O3 -g execution test
FAIL: libgomp.fortran/vla7.f90 -Os execution test
I wonder if it would be better to simply _not_ use the "old" type
when building the TYPE_DECL for the restrict array type...
Index: gcc/fortran/trans-decl.c
===================================================================
--- gcc/fortran/trans-decl.c (revision 235945)
+++ gcc/fortran/trans-decl.c (working copy)
@@ -1004,8 +1004,8 @@ gfc_build_qualified_array (tree decl, gf
}
}
TYPE_NAME (type) = type_decl = build_decl (input_location,
- TYPE_DECL, NULL, gtype);
- DECL_ORIGINAL_TYPE (type_decl) = gtype;
+ TYPE_DECL, NULL, type);
+ DECL_ORIGINAL_TYPE (type_decl) = type;
}
}
this also fixes the original testcase but it seems that was done on
purpose for debug info in r139774 (by Jakub again).
As for the execute fail it looks like the place of the DECL_EXPR
is wrong (just guessing here).
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Subject: [Bug c++/70977] Error during compilation of facebook/wangle (flag c++0x works, flag c++14 fails).
Date: Fri, 06 May 2016 12:04:00 -0000
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Aleksander Gajewski <aleksandergajewski at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aleksandergajewski at gmail dot co
| |m
Build| |x86_64
--- Comment #1 from Aleksander Gajewski <aleksandergajewski at gmail dot com> ---
Compiled on Debian 8 with gcc-5.3.
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Subject: [Bug debug/70935] [6/7 Regression] ICE: verify_ssa failed (error: definition in block 9 does not dominate use in block 12) w/ -O3 -g
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--- Comment #5 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Author: ienkovich
Date: Fri May 6 12:07:25 2016
New Revision: 235962
URL: https://gcc.gnu.org/viewcvs?rev=235962&root=gcc&view=rev
Log:
gcc/
2016-05-06 Yuri Rumyantsev <ysrumyan@gmail.com>
PR debug/70935
* tree-ssa-loop-unswitch.c (find_loop_guard): Reject guard edge with
loop latch destination.
gcc/testsuite/
2016-05-06 Yuri Rumyantsev <ysrumyan@gmail.com>
PR debug/70935
* gcc.dg/torture/pr70935.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70935.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-loop-unswitch.c
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Subject: [Bug target/70976] Useless vectorization leads to degradation of performance
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target| |x86_64-*-*, i?86-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-06
Component|rtl-optimization |target
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The cost estimate for the unsigned vector multiplication is off.
Confirmed also for the second observation - even the scalar loop could have
been improved by transforming it into
u = 1;
for(unsigned long i = 0; i < 1UL<<30 / 2; i++)
u += 23442*u;
u *= u;
u *= 13;
but I hardly think that blaming this on the compiler is ok - the source
is simply using a very inefficient algorithm. Still we could pattern
match some of the most common summation sequences and transform them
into sth better.
Keeping this bug for the target vectorizer cost model issue which should have
prevented vectorization from being happened.
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Subject: [Bug rtl-optimization/70978] New: [5 Regression] internal compiler error: in assign_by_spills, at lra-assigns.c:1428 on arm
Date: Fri, 06 May 2016 12:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70978
Bug ID: 70978
Summary: [5 Regression] internal compiler error: in
assign_by_spills, at lra-assigns.c:1428 on arm
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ktkachov at gcc dot gnu.org
Target Milestone: ---
Target: arm*
Created attachment 38426
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38426&action=edit
Reduced testcase
The attached testcases ICEs in LRA on the GCC 5 branch when compiled with
-S -O3 -mfloat-abi=hard -mcpu=cortex-a57 -mfpu=neon-fp-armv8.
../reduced.c: In function 'f2':
../reduced.c:36:5: warning: implicit declaration of function 'f3'
[-Wimplicit-function-declaration]
f3 (f, f3, m);
^
../reduced.c:80:1: error: unable to find a register to spill
}
^
../reduced.c:80:1: error: this is the insn:
(insn 242 241 33 4 (set (reg:SI 246)
(plus:SI (reg:SI 243)
(reg:SI 245))) ../reduced.c:40 4 {*arm_addsi3}
(expr_list:REG_DEAD (reg:SI 245)
(expr_list:REG_DEAD (reg:SI 243)
(nil))))
../reduced.c:80:1: internal compiler error: in assign_by_spills, at
lra-assigns.c:1428
0xa67cfa _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
$SRC/gcc/rtl-error.c:110
0x987cfc assign_by_spills
$SRC/gcc/lra-assigns.c:1428
0x987cfc lra_assign()
$SRC/gcc/lra-assigns.c:1603
0x98424f lra(_IO_FILE*)
$SRC/gcc/lra.c:2389
0x94576c do_reload
$SRC/gcc/ira.c:5422
0x94576c execute
$SRC/gcc/ira.c:5593
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.
This doesn't happen on trunk, GCC 6, or 4.9.
Bisection on the branch showed that it started with r233454, a backport of a
trunk patch.
However, that patch is very unlikely to be the cause of this, but rather seems
to expose a latent bug, perhaps in LRA. I haven't been able to reproduce this
on trunk by going to the same revision that r233454 backports.
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Subject: [Bug rtl-optimization/70978] [5 Regression] internal compiler error: in assign_by_spills, at lra-assigns.c:1428 on arm
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |4.9.4, 6.1.0, 7.0
Target Milestone|--- |5.4
Known to fail| |5.3.1
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Subject: [Bug c++/70979] New: [C++14] g++ falsely accepts constexpr function returning a lambda
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70979
Bug ID: 70979
Summary: [C++14] g++ falsely accepts constexpr function
returning a lambda
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
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Priority: P3
Component: c++
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Created attachment 38427
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38427&action=edit
The example code
g++ accepts the following code as valid:
constexpr auto make()
{
return []{};
}
int main()
{
make()();
}
However, according to ISO14882:2014 [dcl.constexpr] requires:
The definition of a constexpr function shall satisfy the following
constraints:
[...]
- its return type shall be a literal type;
[...]
While it states in [expr.prim.lambda]:
The type of the lambda-expression (which is also the type of the closure
object) is a unique, unnamed non-union class type - called the closure type -
whose properties are described below. This class type is neither an aggregate
(8.5.1) nor a literal type (3.9) [...]
clang++ reports the following error:
lambda.cpp:1:16: error: constexpr function's return type '(lambda at
lambda.cpp:3:10)' is not a literal type
constexpr auto make()
^
lambda.cpp:3:10: note: '' is not literal because it is not an aggregate and
has no constexpr constructors other than copy or move constructors
return []{};
^
1 error generated.
which would be the expected behavior.
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--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
So it looks like we gimplify type sizes multiple times (in what order?!) and
from
..__result = MAX_EXPR <*n, 0>;
typedef character(kind=1) struct
character(kind=1)[1:2][1:..__result][1:2][1:..__result];
{
integer(kind=8) D.3659;
..__result = MAX_EXPR <*n, 0>;
D.3659 = __result->dim[0].stride;
stride.24 = D.3659 != 0 ? D.3659 : 1;
__result.0 = (character(kind=1)[0:D.3662][1:..__result] * restrict)
__result->data;
size.26 = stride.24 * 2;
offset.25 = -stride.24;
D.3660 = (bitsizetype) (sizetype) ..__result * 8;
D.3661 = (sizetype) ..__result;
D.3662 = size.26 + -1;
D.3663 = SAVE_EXPR <D.3660> * (bitsizetype) (sizetype) size.26;
D.3664 = SAVE_EXPR <D.3661> * (sizetype) size.26;
typedef character(kind=1) struct
character(kind=1)[1:2][1:..__result][1:2][1:..__result];
produce
_1 = *n;
..__result = MAX_EXPR <_1, 0>;
D.4154 = D.3660;
D.4155 = D.4154 * 2;
D.4156 = D.3661;
D.4157 = D.4156 * 2;
{
integer(kind=8) D.3659;
_4 = *n;
..__result = MAX_EXPR <_4, 0>;
D.3659 = __result->dim[0].stride;
if (D.3659 != 0) goto <D.4159>; else goto <D.4160>;
<D.4159>:
iftmp.68 = D.3659;
goto <D.4161>;
<D.4160>:
iftmp.68 = 1;
<D.4161>:
stride.24 = iftmp.68;
__result.0 = __result->data;
size.26 = stride.24 * 2;
offset.25 = -stride.24;
_5 = (sizetype) ..__result;
_6 = (bitsizetype) _5;
D.3660 = _6 * 8;
D.3661 = (sizetype) ..__result;
...
note how the first DECL_EXPR gets gimplifier handling (not strictly needed,
only needed for unsharing) while the second "array" was
gfc_trans_vla_type_sizes'ized.
Note the respective array types are the multi-dimensional ones and are created
for debug info only.
Another "fix" is to avoid the sharing issue between IL and save-expr contents
by simply making sure the IL we emit has no sharing issues. So the following
also avoids the ICE on the original testcase and should be moderately
light-weight (eventually the gimplifier unshares these anyway).
Index: gcc/fortran/trans-decl.c
===================================================================
--- gcc/fortran/trans-decl.c (revision 235945)
+++ gcc/fortran/trans-decl.c (working copy)
@@ -45,6 +45,7 @@ along with GCC; see the file COPYING3.
/* Only for gfc_trans_code. Shouldn't need to include this. */
#include "trans-stmt.h"
#include "gomp-constants.h"
+#include "gimplify.h"
#define MAX_LABEL_VALUE 99999
@@ -3738,7 +3739,7 @@ gfc_trans_vla_one_sizepos (tree *tp, stm
var = gfc_create_var_np (TREE_TYPE (t), NULL);
gfc_add_decl_to_function (var);
- gfc_add_modify (body, var, val);
+ gfc_add_modify (body, var, unshare_expr (val));
if (TREE_CODE (t) == SAVE_EXPR)
TREE_OPERAND (t, 0) = var;
*tp = var;
testing this variant as well now. No results before monday.
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Subject: [Bug c++/70977] Error during compilation of facebook/wangle (flag c++0x works, flag c++14 fails).
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2016-05-06
CC| |trippels at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Please attach the preprocessed file, see https://gcc.gnu.org/bugs/.
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Subject: [Bug tree-optimization/70948] [7 Regression] r235622 caused gcc.c-torture/execute/va-arg-pack-1.c execution failure AArch64
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/70948] [7 Regression] r235622 caused gcc.c-torture/execute/va-arg-pack-1.c execution failure AArch64
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri May 6 12:53:26 2016
New Revision: 235963
URL: https://gcc.gnu.org/viewcvs?rev=235963&root=gcc&view=rev
Log:
2016-05-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/70948
* tree-ssa-structalias.c (find_func_aliases_for_builtin_call):
Properly clobber all fields of va_list for __builtin_va_start.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-structalias.c
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Subject: [Bug tree-optimization/70970] Misaligned SSE with auto-vectorization
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--- Comment #4 from Rodrigo <rcc.dark at gmail dot com> ---
Well, without auto-vectorization the code should work (x86 allows non-SSE
misaligned reads and writes). But I think understand your rationale.
Thanks.
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Subject: [Bug middle-end/70980] New: ICE pre_and_rev_post_order_compute, at cfganal.c:1056
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Bug ID: 70980
Summary: ICE pre_and_rev_post_order_compute, at cfganal.c:1056
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Target Milestone: ---
Host: i386-pc-solaris2.1[012], x86_64-pc-linux-gnu
Target: i386-pc-solaris2.1[012], x86_64-pc-linux-gnu
Build: i386-pc-solaris2.1[012], x86_64-pc-linux-gnu
Between 20160504 and 20160505, g++.dg/pr62079.C began to FAIL on Linux/x86_64
and Solaris/x86, only for 64-bit:
FAIL: g++.dg/pr62079.C (internal compiler error)
FAIL: g++.dg/pr62079.C (test for excess errors)
Excess errors:
/vol/gcc/src/hg/trunk/local/gcc/testsuite/g++.dg/pr62079.C:78:1: internal
compiler error: in pre_and_rev_post_order_compute, at cfganal.c:1056
0x8b6760e pre_and_rev_post_order_compute(int*, int*, bool)
/vol/gcc/src/hg/trunk/local/gcc/cfganal.c:1055
0x8b35001 init_alias_analysis()
/vol/gcc/src/hg/trunk/local/gcc/alias.c:3252
0x96134df sched_init()
/vol/gcc/src/hg/trunk/local/gcc/haifa-sched.c:7369
0x9614b75 haifa_sched_init()
/vol/gcc/src/hg/trunk/local/gcc/haifa-sched.c:7406
0x8f02a1e schedule_insns()
/vol/gcc/src/hg/trunk/local/gcc/sched-rgn.c:3504
0x8f0323b schedule_insns()
/vol/gcc/src/hg/trunk/local/gcc/sched-rgn.c:3498
0x8f0323b rest_of_handle_sched2
/vol/gcc/src/hg/trunk/local/gcc/sched-rgn.c:3737
0x8f0323b execute
/vol/gcc/src/hg/trunk/local/gcc/sched-rgn.c:3873
Rainer
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Subject: [Bug middle-end/70980] ICE pre_and_rev_post_order_compute, at cfganal.c:1056
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70980
Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |7.0
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Subject: [Bug target/70981] New: [7 regression] gcc.target/i386/avx512f-vprord-1.c FAILs
Date: Fri, 06 May 2016 14:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70981
Bug ID: 70981
Summary: [7 regression] gcc.target/i386/avx512f-vprord-1.c
FAILs
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Host: i386-pc-solaris2.1[012], x86_64-pc-linux-gnu
Target: i386-pc-solaris2.1[012], x86_64-pc-linux-gnu
Build: i386-pc-solaris2.1[012], x86_64-pc-linux-gnu
Between 20160503 and 20160504, gcc.target/i386/avx512f-vprord-1.c began to FAIL
(probably on all x86 targets), both 32 and 64-bit:
FAIL: gcc.target/i386/avx512f-vprord-1.c scan-assembler-times vprord[
\\\\t]+[^{\\n]*%zmm[0-9]+(?:\\n|[ \\\\t]+#) 1
FAIL: gcc.target/i386/avx512f-vprord-1.c scan-assembler-times vprord[
\\\\t]+[^{\\n]*%zmm[0-9]+{%k[1-7]}(?:\\n|[ \\\\t]+#) 1
FAIL: gcc.target/i386/avx512f-vprord-1.c scan-assembler-times vprord[
\\\\t]+[^{\\n]*%zmm[0-9]+{%k[1-7]}{z}(?:\\n|[ \\\\t]+#) 1
Rainer
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Subject: [Bug target/70981] [7 regression] gcc.target/i386/avx512f-vprord-1.c FAILs
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----------------------------------------------------------------------------
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Subject: [Bug libstdc++/70360] abi_check FAILs with --enable-vtable-verify
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-06
CC| |ro at gcc dot gnu.org
Summary|--enable-vtable-verify |abi_check FAILs with
| |--enable-vtable-verify
Ever confirmed|0 |1
--- Comment #6 from Rainer Orth <ro at gcc dot gnu.org> ---
I'm seeing the abi_check failure with
>From gcc-bugs-return-524384-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 14:31:34 2016
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Subject: [Bug libstdc++/70360] abi_check FAILs with --enable-vtable-verify
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--- Comment #7 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #6 from Rainer Orth <ro at gcc dot gnu.org> ---
> I'm seeing the abi_check failure with
--enable-vtable-verify on x86_64-pc-linux-gnu and i386-pc-solaris2.12:
7 incompatible symbols
0
_Z24__VLTVerifyVtablePointerPPvPKv
__VLTVerifyVtablePointer(void**, void const*)
version status: incompatible
CXXABI_1.3.8
type: function
status: added
1
__VLTChangePermission
version status: incompatible
CXXABI_1.3.8
type: function
status: added
2
_Z16__VLTRegisterSetPPvPKvjjS0_
__VLTRegisterSet(void**, void const*, unsigned int, unsigned int, void**)
version status: incompatible
CXXABI_1.3.8
type: function
status: added
3
_Z21__VLTRegisterSetDebugPPvPKvjjS0_
__VLTRegisterSetDebug(void**, void const*, unsigned int, unsigned int, void**)
version status: incompatible
CXXABI_1.3.8
type: function
status: added
4
_Z22__VLTRegisterPairDebugPPvPKvjS2_PKcS4_
__VLTRegisterPairDebug(void**, void const*, unsigned int, void const*, char
const*, char const*)
version status: incompatible
CXXABI_1.3.8
type: function
status: added
5
_Z29__VLTVerifyVtablePointerDebugPPvPKvPKcS4_
__VLTVerifyVtablePointerDebug(void**, void const*, char const*, char const*)
version status: incompatible
CXXABI_1.3.8
type: function
status: added
6
_Z17__VLTRegisterPairPPvPKvjS2_
__VLTRegisterPair(void**, void const*, unsigned int, void const*)
version status: incompatible
CXXABI_1.3.8
type: function
status: added
==== libstdc++-v3 check-abi Summary ====
# of added symbols: 94
# of missing symbols: 0
# of undesignated symbols: 0
# of incompatible symbols: 7
Nothing to do with --enable-default-pie.
Perhaps one could have them in a baseline fragment that is only
used/checked with --enable-vtable-verify?
Rainer
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Subject: [Bug libstdc++/70982] experimental/filesystem/iterators/directory_iterator.cc etc. FAIL with --enable-vtable-verify
Date: Fri, 06 May 2016 14:38:00 -0000
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----------------------------------------------------------------------------
Target Milestone|--- |7.0
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70982] New: experimental/filesystem/iterators/directory_iterator.cc etc. FAIL with --enable-vtable-verify
Date: Fri, 06 May 2016 14:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70982
Bug ID: 70982
Summary: experimental/filesystem/iterators/directory_iterator.c
c etc. FAIL with --enable-vtable-verify
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
Target Milestone: ---
Host: i386-pc-solaris2.12, x86_64-pc-linux-gnu
Target: i386-pc-solaris2.12, x86_64-pc-linux-gnu
Build: i386-pc-solaris2.12, x86_64-pc-linux-gnu
With --enable-vtable-verify, two libstdc++ testcases FAIL on Solaris 12/x86 and
Linux/x86_64:
FAIL: experimental/filesystem/iterators/directory_iterator.cc execution test
VTV: PID=19218 PPID=27468 Looking for vtable 8097254 in set fdfdded4.
VTV: PID=19218 PPID=27468 *** Unable to verify vtable pointer (8097254) in set
(fdfdded4) ***
VTV: PID=19218 PPID=27468 Backtrace:
/var/gcc/regression/trunk/12-gcc/build/i386-pc-solaris2.12/libvtv/.libs/libvtv.so.0.0.0'_Z30__vtv_log_verification_failurePKcb+0x56
[0xfdf86f06]
/var/gcc/regression/trunk/12-gcc/build/i386-pc-solaris2.12/libvtv/.libs/libvtv.so.0.0.0'_Z17__vtv_verify_failPPvPKv+0x8c
[0xfdf869fc]
/var/gcc/regression/trunk/12-gcc/build/i386-pc-solaris2.12/libvtv/.libs/libvtv.so.0.0.0'_Z24__VLTVerifyVtablePointerPPvPKv+0xbf
[0xfdf86c5f]
/var/gcc/regression/trunk/12-gcc/build/i386-pc-solaris2.12/libstdc++-v3/testsuite/normal4/directory_iterator.exe'_Z6test01v+0x3661
[0x8061681]
/var/gcc/regression/trunk/12-gcc/build/i386-pc-solaris2.12/libstdc++-v3/testsuite/normal4/directory_iterator.exe'main+0x16
[0x8061826]
/var/gcc/regression/trunk/12-gcc/build/i386-pc-solaris2.12/libstdc++-v3/testsuite/normal4/directory_iterator.exe'_start+0x46
[0x805cee6]
*** Unable to verify vtable pointer (8097254) in set (fdfdded4) ***
Potential vtable pointer corruption detected!!
FAIL: experimental/filesystem/operations/copy.cc execution test
VTV: PID=31686 PPID=233690 Looking for vtable 0x614850 in set 0x7f03504acd40.
VTV: PID=31686 PPID=233690 *** Unable to verify vtable pointer (0x614850) in
set (0x7f03504acd40) ***
VTV: PID=31686 PPID=233690 Backtrace:
/var/gcc/regression/trunk/3.19.8-gcc-gas-gld/build/x86_64-pc-linux-gnu/libstdc++-v3/../libvtv/.libs/libvtv.so.0(_Z30__vtv_log_verification_failurePKcb+0x4a)[0x7f03508bbbda]
/var/gcc/regression/trunk/3.19.8-gcc-gas-gld/build/x86_64-pc-linux-gnu/libstdc++-v3/../libvtv/.libs/libvtv.so.0(_Z17__vtv_verify_failPPvPKv+0x89)[0x7f03508bb079]
/var/gcc/regression/trunk/3.19.8-gcc-gas-gld/build/x86_64-pc-linux-gnu/libstdc++-v3/../libvtv/.libs/libvtv.so.0(_Z24__VLTVerifyVtablePointerPPvPKv+0xa8)[0x7f03508bb2d8]
/var/gcc/regression/trunk/3.19.8-gcc-gas-gld/build/x86_64-pc-linux-gnu/./libstdc++-v3/src/.libs/libstdc++.so.6(_ZSt21__copy_streambufs_eofIcSt11char_traitsIcEElPSt15basic_streambufIT_T0_ES6_Rb+0x12e)[0x7f035058868e]
/var/gcc/regression/trunk/3.19.8-gcc-gas-gld/build/x86_64-pc-linux-gnu/./libstdc++-v3/src/.libs/libstdc++.so.6(_ZNSolsEPSt15basic_streambufIcSt11char_traitsIcEE+0x4f)[0x7f03505f1edf]
./copy.exe[0x40afd6]
./copy.exe[0x40b60a]
./copy.exe[0x40b845]
./copy.exe[0x406f8e]
./copy.exe[0x402ff3]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x3589a21d65]
./copy.exe[0x403dc5]
*** Unable to verify vtable pointer (0x614850) in set (0x7f03504acd40) ***
The second failure is currently hidden on Solaris 12 due to PR libstdc++/70975.
Rainer
>From gcc-bugs-return-524387-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 14:46:37 2016
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From: "andres.tiraboschi at tallertechnologies dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70201] Dump C++ template instantiations
Date: Fri, 06 May 2016 14:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70201
Andrés AgustÃn Tiraboschi <andres.tiraboschi at tallertechnologies dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #38139|0 |1
is obsolete| |
--- Comment #6 from Andrés AgustÃn Tiraboschi <andres.tiraboschi at tallertechnologies dot com> ---
Created attachment 38428
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38428&action=edit
Patch adding new flag in order to dump information about template
instantiations.
Changelog
2016-05-6 Andres Tiraboschi <andres.tiraboschi@tallertechnologies.com>
* gcc/c-family/c.opt (ftemplate-instantiations): New flag.
* gcc/flag-types.h (ti_dump_options): New type.
* gcc/cp/decl2.c (cp_write_global_declarations): Added code to dump
information.
* gcc/cp/pt.h: New file.
* gcc/cp/pt.h (template_instantiations_callbacks): New type.
(dependence_tree): Likewise.
(call_template_instantiation_callbacks): Declare.
(add_template_instantiations_callbacks): Likewise.
(clean_up_callbacks): Likewise.
* gcc/cp/pt.c (human_readable_template_instantiations): New type.
(instantiation_callbacks): Declare.
(call_template_instantiation_callback): New function.
(add_template_instantiations_callbacks): Likewise.
(initialize_instantiations_callbacks): Likewise.
(clean_up_callbacks): Likewise.
(init_template_processing): Added code to initialize
instatiation_callbacks.
(register_specialization): Added code to dump information.
(retrieve_specialization): Likewise.
(lookup_template_class): Likewise.
(lookup_template_function): Likewise.
* gcc/doc/invoke.texi (ftemplate-instantiations): Added documentation.
* gcc/cp/config-lang.in (gtfiles): Added \$(srcdir)/cp/pt.h
* gcc/cp/Make-lang.in (CP_PLUGIN_HEADERS): Added pt.h.
* gcc/cp/cp-lang.c: pt.h included.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/70975] experimental/filesystem/operations/copy.cc FAILs on Solaris 12
Date: Fri, 06 May 2016 14:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70975
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-06
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-524389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 14:52:39 2016
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From: "jackweston at live dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70983] New: False ambiguity on member function rvalue overload using auto
Date: Fri, 06 May 2016 14:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70983
Bug ID: 70983
Summary: False ambiguity on member function rvalue overload
using auto
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
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Component: c++
Assignee: unassigned at gcc dot gnu.org
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In the following code, the call to Foo::GetString() works fine but the call to
Foo::GetStringAuto() is reported as ambiguous and fails to compile. The auto
should be deduced as `std::string` in both cases and the two situations should
be identical (and unambiguous).
--------------
#include <string>
class Foo
{
public:
Foo(std::string string) : m_string(std::move(string)) {}
std::string & GetString() & { return m_string; }
std::string && GetString() && { return std::move(m_string); }
auto & GetStringAuto() & { return m_string; }
auto && GetStringAuto() && { return std::move(m_string); }
private:
std::string m_string;
};
int main()
{
Foo foo("blah");
std::string fooStringA = foo.GetString(); // works
std::string fooStringB = foo.GetStringAuto(); // call is ambiguous
return 0;
}
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Subject: [Bug c++/70977] Error during compilation of facebook/wangle (flag c++0x works, flag c++14 fails).
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--- Comment #3 from Aleksander Gajewski <aleksandergajewski at gmail dot com> ---
Created attachment 38429
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38429&action=edit
Preprocessed file
Preprocessed file causing gcc-6.1 crash.
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Subject: [Bug c++/70977] Error during compilation of facebook/wangle (flag c++0x works, flag c++14 fails).
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--- Comment #4 from Aleksander Gajewski <aleksandergajewski at gmail dot com> ---
Created attachment 38430
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38430&action=edit
Preprocessed file compiled by gcc-6.1.
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Subject: [Bug target/63596] Saving of GPR/FPRs for stdarg even though the variable argument is not used
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--- Comment #4 from Jiong Wang <jiwang at gcc dot gnu.org> ---
A patch set which clean up variable argument support on AArch64 has been sent
for review
https://gcc.gnu.org/ml/gcc-patches/2016-05/msg00508.html
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From: "seurer at linux dot vnet.ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70941] [5/6 Regression] Test miscompiled with -O2.
Date: Fri, 06 May 2016 15:03:00 -0000
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Bill Seurer <seurer at linux dot vnet.ibm.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |seurer at linux dot vnet.ibm.com
--- Comment #10 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
The new test case fails on powerpc64le:
> FAIL: gcc.dg/torture/pr70941.c -O0 execution test
> FAIL: gcc.dg/torture/pr70941.c -O1 execution test
> FAIL: gcc.dg/torture/pr70941.c -O2 execution test
> FAIL: gcc.dg/torture/pr70941.c -O2 -flto -fno-use-linker-plugin -flto-partition=none execution test
> FAIL: gcc.dg/torture/pr70941.c -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects execution test
> FAIL: gcc.dg/torture/pr70941.c -O3 -g execution test
> FAIL: gcc.dg/torture/pr70941.c -Os execution test
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/torture/pr70941.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -flto
-fno-use-linker-plugin -flto-partition=none -g -lm -o ./pr70941.exe
seurer@genoa:~/gcc/build/gcc-test$ gdb ./pr70941.exe
(gdb) break 11
Breakpoint 1 at 0x100004d8: file
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr70941.c, line 11.
(gdb) run
Starting program: /home/seurer/gcc/build/gcc-test/pr70941.exe
Breakpoint 1, main () at
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr70941.c:12
12 abort();
(gdb) print a
$1 = 147 '\223'
(gdb) c
Continuing.
Program received signal SIGABRT, Aborted.
0x00003fffb7d00a88 in __GI_raise (sig=<optimized out>) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) where
#0 0x00003fffb7d00a88 in __GI_raise (sig=<optimized out>) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1 0x00003fffb7d0686c in __GI_abort () at abort.c:89
#2 0x00000000100004dc in main () at
/home/seurer/gcc/gcc-test/gcc/testsuite/gcc.dg/torture/pr70941.c:12
(
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Subject: [Bug target/70941] [5/6 Regression] Test miscompiled with -O2.
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--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
unsigned char perhaps? Let me fix up the testcase.
It has other non-portable assumptions.
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Subject: [Bug target/58219] [SH] mov.l insn length is wrong on SH2A
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
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--- Comment #3 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Fixed for GCC 7. Not planning to backport.
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Subject: [Bug target/70941] [5/6 Regression] Test miscompiled with -O2.
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--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri May 6 15:23:56 2016
New Revision: 235978
URL: https://gcc.gnu.org/viewcvs?rev=235978&root=gcc&view=rev
Log:
PR middle-end/70941
* gcc.dg/torture/pr70941.c (abort): Remove prototype.
(a, b, c, d): Change type from char to signed char.
(main): Compare against (signed char) -1634678893 instead of
hardcoded -109. Use __builtin_abort instead of abort.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/torture/pr70941.c
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Subject: [Bug target/52933] SH Target: Use div0s for integer sign comparisons
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Oleg Endo <olegendo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #9 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #5)
> Some of the original test cases are still not working. In particular cases
> where bit positions != 31 are compared/xor'ed:
>
> ...
I've added support for some of those cases. It could be extended to somehow
deal with arbitrary bit positions of both operands, but it doesn't seem worth
the trouble. Thus declaring issue as fixed.
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Subject: [Bug c++/70977] Error during compilation of facebook/wangle (flag c++0x works, flag c++14 fails).
Date: Fri, 06 May 2016 15:26:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |compile-time-hog,
| |memory-hog
Status|WAITING |NEW
--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Confirmed. The compiler keeps allocating memory until it gets killed
by the OOM killer.
Overhead Command Shared Object Symbol
19.35% cc1plus cc1plus [.] push_to_top_level
5.78% cc1plus cc1plus [.] ht_lookup
3.43% cc1plus libc-2.23.so [.] _int_malloc
2.69% cc1plus cc1plus [.] tsubst_copy_and_build
2.55% cc1plus cc1plus [.] ggc_internal_alloc
2.23% cc1plus cc1plus [.] maybe_constant_init
2.16% cc1plus cc1plus [.] implicit_conversion
2.16% cc1plus cc1plus [.] cp_type_quals
2.05% cc1plus libc-2.23.so [.] __libc_calloc
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Subject: [Bug c++/70977] Error during compilation of facebook/wangle (flag c++0x works, flag c++14 fails).
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--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
#0 tree_code_size (code=code@entry=CONSTRUCTOR) at ../../gcc/gcc/tree.c:848
#1 0x0000000000fc562d in make_node_stat (code=code@entry=CONSTRUCTOR) at
../../gcc/gcc/tree.c:1005
#2 0x0000000000fc88e4 in build_constructor (type=0x7ffff71ddb28,
vals=vals@entry=0x0) at ../../gcc/gcc/tree.c:1842
#3 0x000000000064d1e6 in reshape_init_array_1 (elt_type=0x7ffff701e000,
max_index=0x7ffff70c5030, d=0x7fffffffb190, d@entry=0x7fffffffb188,
complain=complain@entry=1) at ../../gcc/gcc/cp/decl.c:5514
#4 0x000000000064c500 in reshape_init_vector (complain=<optimized out>,
d=<optimized out>, type=<optimized out>) at ../../gcc/gcc/cp/decl.c:5599
#5 reshape_init_r (type=type@entry=0x7ffff16dee70, d=d@entry=0x7fffffffb190,
first_initializer_p=first_initializer_p@entry=true, complain=complain@entry=1)
at ../../gcc/gcc/cp/decl.c:5905
#6 0x000000000064c0ab in reshape_init (type=0x7ffff16dee70,
init=init@entry=0x7fff64da1ab0, complain=complain@entry=1) at
../../gcc/gcc/cp/decl.c:5945
#7 0x00000000007ce2a9 in finish_compound_literal (type=<optimized out>,
type@entry=0x7ffff16dee70, compound_literal=0x7fff64da1ab0,
complain=complain@entry=1) at ../../gcc/gcc/cp/semantics.c:2719
#8 0x00000000006a8bb9 in tsubst_copy_and_build (t=t@entry=0x7fff64da1a98,
args=args@entry=0x0, complain=complain@entry=1, in_decl=in_decl@entry=0x0,
function_p=function_p@entry=false,
integral_constant_expression_p=integral_constant_expression_p@entry=true) at
../../gcc/gcc/cp/pt.c:16962
#9 0x00000000006aa654 in instantiate_non_dependent_expr_internal (complain=1,
expr=0x7fff64da1a98) at ../../gcc/gcc/cp/pt.c:5640
#10 instantiate_non_dependent_or_null (expr=0x7fff64da1a98) at
../../gcc/gcc/cp/pt.c:5689
#11 0x00000000007a719c in constant_value_1 (decl=0x7fff64da7480, strict_p=true,
return_aggregate_cst_ok_p=return_aggregate_cst_ok_p@entry=true) at
../../gcc/gcc/cp/init.c:2076
#12 0x00000000007a8fac in decl_constant_value (decl=<optimized out>) at
../../gcc/gcc/cp/init.c:2128
#13 0x0000000000861f29 in cxx_eval_constant_expression
(ctx=ctx@entry=0x7fffffffb800, t=<optimized out>, t@entry=0x7ffff16b5f30,
lval=lval@entry=false, non_constant_p=non_constant_p@entry=0x7fffffffd78e,
overflow_p=overflow_p@entry=0x7fffffffd78f, jump_target=jump_target@entry=0x0)
at ../../gcc/gcc/cp/constexpr.c:3509
#14 0x000000000086052c in cxx_eval_array_reference (overflow_p=0x7fffffffd78f,
non_constant_p=0x7fffffffd78e, lval=false, t=0x7ffff24f9818,
ctx=0x7fffffffb800) at ../../gcc/gcc/cp/constexpr.c:1961
#15 cxx_eval_constant_expression (ctx=ctx@entry=0x7fffffffb800, t=<optimized
out>, lval=lval@entry=false,
non_constant_p=non_constant_p@entry=0x7fffffffd78e,
overflow_p=overflow_p@entry=0x7fffffffd78f, jump_target=jump_target@entry=0x0)
at ../../gcc/gcc/cp/constexpr.c:3832
#16 0x00000000008610fa in cxx_eval_indirect_ref (overflow_p=0x7fffffffd78f,
non_constant_p=0x7fffffffd78e, lval=false, t=0x7ffff16e0d40,
ctx=0x7fffffffb800) at ../../gcc/gcc/cp/constexpr.c:2868
#17 cxx_eval_constant_expression (ctx=ctx@entry=0x7fffffffb800, t=<optimized
out>, t@entry=0x7ffff16e0d40, lval=lval@entry=false,
non_constant_p=non_constant_p@entry=0x7fffffffd78e,
overflow_p=overflow_p@entry=0x7fffffffd78f, jump_target=jump_target@entry=0x0)
at ../../gcc/gcc/cp/constexpr.c:3695
#18 0x000000000086968e in cxx_eval_binary_expression
(ctx=ctx@entry=0x7fffffffb800, t=t@entry=0x7ffff24a4528,
non_constant_p=non_constant_p@entry=0x7fffffffd78e,
overflow_p=overflow_p@entry=0x7fffffffd78f) at
../../gcc/gcc/cp/constexpr.c:1725
#19 0x00000000008604cd in cxx_eval_constant_expression
(ctx=ctx@entry=0x7fffffffb800, t=<optimized out>, t@entry=0x7ffff24a4528,
lval=lval@entry=false, non_constant_p=non_constant_p@entry=0x7fffffffd78e,
overflow_p=overflow_p@entry=0x7fffffffd78f, jump_target=jump_target@entry=0x0)
at ../../gcc/gcc/cp/constexpr.c:3809
...
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Subject: [Bug c++/70979] [C++14] g++ falsely accepts constexpr function returning a lambda
Date: Fri, 06 May 2016 15:45:00 -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| |2016-05-06
CC| |msebor at gcc dot gnu.org
Blocks| |55004
Ever confirmed|0 |1
Known to fail| |5.3.0, 6.1.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Constexpr functions involving lambdas are not in C++ 14. A
proposal to accept the construct was voted in to the next version of the
language, C++ 17, at the last C++ meeting (P0170R1 -
https://isocpp.org/files/papers/P0170R1.pdf). G++ is ahead of the game on this
feature but it should either disable it or diagnose it with a warning in C++ 14
mode.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004
[Bug 55004] [meta-bug] constexpr issues
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Subject: [Bug target/70941] [5/6 Regression] Test miscompiled with -O2.
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--- Comment #13 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
That fixed the issues on power, thanks!
>From gcc-bugs-return-524402-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 16:29:06 2016
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Subject: [Bug rtl-optimization/70961] Regrename ignores preferred_rename_class
Date: Fri, 06 May 2016 16:29:00 -0000
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> In which case it should not rename that chain rather than just ignore the
> preference (and a preference of NO_REGS should probably also block renaming).
That's not what the hook was initially designed for, as implied by its name.
> Actually for a chain of GENERAL_REGS the preferred class should be
> GENERAL_REGS - using LO_REGS in that case would be counterproductive. You'd
> prefer LO_REGS only when *some* of the patterns in a chain are LO_REGS. But
> since the callback only ever sees the union of all classes in a chain, I
> don't think could make the correct decision.
That's why the superunion was chosen. If all the patterns are LO_REGS, it will
be LO_REGS; likewise for HI_REGS. It's GENERAL_REGS only when there is a mixed
bag of them.
> I tried something similar, as well as always returning LO_REGS or NO_REGS,
> but this makes no difference at all due to pass 2 ignoring the preference...
So what happens if you block the second pass with a special class value?
>From gcc-bugs-return-524403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 16:40:03 2016
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From: "felix.morgner at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70979] [C++14] g++ falsely accepts constexpr function returning a lambda
Date: Fri, 06 May 2016 16:40:00 -0000
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--- Comment #2 from Felix Morgner <felix.morgner at gmail dot com> ---
That is why I explicitly referred to C++14. I strongly believe, that the right
thing to do would be to disable it (handle it as an error) since it is just
that when compiling in C++14 mode. Maybe the error message could state that
this is not allowed in C++14 but as I said, in my opinion it has to be an
error.
>From gcc-bugs-return-524404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 16:50:20 2016
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Subject: [Bug target/70957] testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on power7
Date: Fri, 06 May 2016 16:50:00 -0000
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-06
CC| |dje at gcc dot gnu.org,
| |meissner at gcc dot gnu.org,
| |segher at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Confirmed, but this is quite odd. A compiler configured for debug works fine,
but a compiler configured for bootstrap errors as described. The test case is
fine as written since we are just compiling code for a power9 target, not
executing it. CCing others for suggestions on what would cause the P9 target
flags to go belly up when bootstrapped but not otherwise.
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Subject: [Bug rtl-optimization/70961] Regrename ignores preferred_rename_class
Date: Fri, 06 May 2016 16:57:00 -0000
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--- Comment #5 from Wilco <wdijkstr at arm dot com> ---
As for a simple example, Proc_4 in Dhrystone is a good one. With -O2 and
-fno-rename-registers I get the following on Thumb-2:
000000c8 <Proc_4>:
c8: b430 push {r4, r5}
ca: f240 0300 movw r3, #0
ce: f240 0400 movw r4, #0
d2: f2c0 0300 movt r3, #0
d6: f2c0 0400 movt r4, #0
da: f240 0100 movw r1, #0
de: 681a ldr r2, [r3, #0]
e0: f2c0 0100 movt r1, #0
e4: 7824 ldrb r4, [r4, #0]
e6: 2542 movs r5, #66 ; 0x42
e8: 700d strb r5, [r1, #0]
ea: 2c41 cmp r4, #65 ; 0x41
ec: bf08 it eq
ee: f042 0201 orreq.w r2, r2, #1
f2: 601a str r2, [r3, #0]
f4: bc30 pop {r4, r5}
f6: 4770 bx lr
With -frename-registers:
000000c8 <Proc_4>:
c8: b430 push {r4, r5}
ca: f240 0300 movw r3, #0
ce: f240 0400 movw r4, #0
d2: f2c0 0300 movt r3, #0
d6: f2c0 0400 movt r4, #0
da: f240 0100 movw r1, #0
de: 681a ldr r2, [r3, #0]
e0: f2c0 0100 movt r1, #0
e4: f894 c000 ldrb.w ip, [r4]
e8: 2542 movs r5, #66 ; 0x42
ea: 700d strb r5, [r1, #0]
ec: f1bc 0f41 cmp.w ip, #65 ; 0x41
f0: bf08 it eq
f2: f042 0201 orreq.w r2, r2, #1
f6: 601a str r2, [r3, #0]
f8: bc30 pop {r4, r5}
fa: 4770 bx lr
So here it changed 2 16-bit instructions into 32-bit ones by changing R4 to IP.
However there is no benefit in doing so as it doesn't remove a move or create
additionally scheduling opportunities (the first liverange of R4 has only a
single use, so when it goes dead it is actually best to reuse R4 rather than
use a different register).
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Subject: [Bug target/70957] testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on power7
Date: Fri, 06 May 2016 16:57:00 -0000
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--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Configuration for the two compilers used:
$GCC_SRC/configure --enable-__cxa_atexit
--enable-languages=c,c++,fortran,objc,obj-c++,go --with-cpu=power7
--disable-libsanitizer --with-gmp=/home/wschmidt/gcc-libs/gcc-host-libs-ppc64
--without-ppl --without-cloog --prefix=$GCC_INSTALL --enable-lto
with --disable-bootstrap for the debug compiler. No change in option flags
during compilation.
wschmidt@bns:~/src> setgcc test debug
GCC_SRC = /home/wschmidt/gcc/gcc-mainline-test
GCC_BUILD = /home/wschmidt/gcc/build/gcc-mainline-test-debug
GCC_INSTALL= /home/wschmidt/gcc/install/gcc-mainline-test-debug
wschmidt@bns:~/src> $GCC_INSTALL/bin/gcc -O0 -mcpu=power9 vsx-elemrev-4.c -S
wschmidt@bns:~/src> grep -c lxvx vsx-elemrev-4.s
40
wschmidt@bns:~/src> grep -c stxvx vsx-elemrev-4.s
40
wschmidt@bns:~/src> setgcc test
GCC_SRC = /home/wschmidt/gcc/gcc-mainline-test
GCC_BUILD = /home/wschmidt/gcc/build/gcc-mainline-test
GCC_INSTALL= /home/wschmidt/gcc/install/gcc-mainline-test
wschmidt@bns:~/src> $GCC_INSTALL/bin/gcc -O0 -mcpu=power9 vsx-elemrev-4.c -S
vsx-elemrev-4.c: In function ‘foo21’:
vsx-elemrev-4.c:137:3: error: invalid parameter combination for AltiVec
intrinsic
vsll = vec_xl (0, sllp);
^~~~
vsx-elemrev-4.c: In function ‘foo22’:
vsx-elemrev-4.c:142:3: error: invalid parameter combination for AltiVec
intrinsic
vull = vec_xl (0, ullp);
^~~~
vsx-elemrev-4.c: In function ‘foo31’:
vsx-elemrev-4.c:187:3: error: invalid parameter combination for AltiVec
intrinsic
vec_xst (vsll, 0, sllp);
^~~~~~~
vsx-elemrev-4.c: In function ‘foo32’:
vsx-elemrev-4.c:192:3: error: invalid parameter combination for AltiVec
intrinsic
vec_xst (vull, 0, ullp);
^~~~~~~
wschmidt@bns:~/src>
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Subject: [Bug target/70957] testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on power7
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--- Comment #4 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
The other odd thing is that we fail only on the signed and unsigned long long
cases, and all of the other variants work.
>From gcc-bugs-return-524408-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 17:20:02 2016
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Subject: [Bug fortran/70949] Invalid aggregate against pointer comparison
Date: Fri, 06 May 2016 17:20:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 70950 has been marked as a duplicate of this bug. ***
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Subject: [Bug fortran/70950] ICE with -O0 in simplify_subreg, at simplify-rtx.c:5895
Date: Fri, 06 May 2016 17:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70950
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of pr70949.
*** This bug has been marked as a duplicate of bug 70949 ***
>From gcc-bugs-return-524410-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 20:02:15 2016
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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++/70943] Bogus 'conflicting declaration' error with repeated typedefs in function templates
Date: Fri, 06 May 2016 20:02:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-06
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.5.3, 4.8.3, 4.9.3, 5.3.0,
| |6.1.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. The following C++ 98 test case is also rejected with similar
errors, going as far back as 4.5.3.
template <class T>
void foo (T) {
typedef T X;
typedef int X;
extern T bar ();
extern int bar ();
}
template void foo (int);
xxx.c: In function ‘void foo(T)’:
xxx.c:4:17: error: conflicting declaration ‘typedef int X’
typedef int X;
^
xxx.c:3:15: note: previous declaration as ‘typedef T X’
typedef T X;
^
xxx.c:7:16: error: ambiguating new declaration of ‘int bar()’
extern int bar ();
^~~
xxx.c:6:14: note: old declaration ‘T bar()’
extern T bar ();
^~~
>From gcc-bugs-return-524411-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 20:09:53 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70984] New: Templated derived class erroneously allows taking address of private base class member functions
Date: Fri, 06 May 2016 20:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70984
Bug ID: 70984
Summary: Templated derived class erroneously allows taking
address of private base class member functions
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: awise.gcc.bug at gmail dot com
Target Milestone: ---
Created attachment 38431
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38431&action=edit
Preprocessed source code
Given a base class:
class B {
protected:
void fprot();
int iprot;
private:
void fpriv();
int ipriv;
};
A normal non-templated derived class appears to honour the visibility of base
class members in the way that I'd expect:
class A : public B {
public:
void f() {
void (B::*f)();
int i;
//f = &B::fprot; - protected in this context
//f = &B::fpriv; - private in this context
f = &A::fprot; // OK - access to protected base member via public
derivation
//f = &A::fpriv; - private in this context
fprot(); // OK - access to protected base member via public
derivation
//fpriv(); - private in this context
i = iprot; // OK - access to protected base member via public
derivation
//i = ipriv; - private in this context
}
};
However, a templated derived class allows the address of the private and
protected member functions of the base class to be evaluated when I don't
believe it should:
template<int N>
class C : public B {
public:
void f() {
void (B::*f)();
int i;
f = &B::fprot; // Should be an error - protected in this context?
f = &B::fpriv; // Should be an error - private in this context?
f = &C::fprot; // OK - access to protected base member via public
derivation
f = &C::fpriv; // Should be an error - private in this context?
fprot(); // OK - access to protected base member via public
derivation
//fpriv(); - private in this context
i = iprot;
//i = ipriv; - private in this context
}
};
template class C<42>;
I'd expect the visibility to be the same as in the non-templated derived class,
above.
log of compile invoked as "g++ -v -save-temps -c gcc_bug1.cpp":
Using built-in specs.
COLLECT_GCC=g++
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)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE gcc_bug1.cpp -mtune=generic -march=x86-64
-fpch-preprocess -fstack-protector-strong -Wformat -Wformat-security -o
gcc_bug1.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/5"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/5/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/5
/usr/include/x86_64-linux-gnu/c++/5
/usr/include/c++/5/backward
/usr/lib/gcc/x86_64-linux-gnu/5/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/5/cc1plus -fpreprocessed gcc_bug1.ii -quiet
-dumpbase gcc_bug1.cpp -mtune=generic -march=x86-64 -auxbase gcc_bug1 -version
-fstack-protector-strong -Wformat -Wformat-security -o gcc_bug1.s
GNU C++ (Ubuntu 5.3.1-14ubuntu2) version 5.3.1 20160413 (x86_64-linux-gnu)
compiled by GNU C version 5.3.1 20160413, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++ (Ubuntu 5.3.1-14ubuntu2) version 5.3.1 20160413 (x86_64-linux-gnu)
compiled by GNU C version 5.3.1 20160413, GMP version 6.1.0, MPFR
version 3.1.4, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: a544146c1c8bd944ae4c4ff6181f339e
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
as -v --64 -o gcc_bug1.o gcc_bug1.s
GNU assembler version 2.26 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/5/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/5/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-c' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
>From gcc-bugs-return-524412-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 20:12:06 2016
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70985] New: ICE on valid code at -O3 on x86_64-linux-gnu: verify_gimple failed
Date: Fri, 06 May 2016 20:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70985
Bug ID: 70985
Summary: ICE on valid code at -O3 on x86_64-linux-gnu:
verify_gimple failed
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current gcc trunk at
-O3 on x86_64-linux-gnu in both 32-bit and 64-bit modes.
$ 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/7.0.0/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 7.0.0 20160506 (experimental) [trunk revision 235952] (GCC)
$
$ gcc-trunk -O2 -c small.c
$
$ gcc-trunk -O3 -c small.c
small.c: In function ‘fn2’:
small.c:15:1: error: invalid operand in unary operation
fn2 ()
^~~
# VUSE <.MEM_8(D)>
a_f0_lsm0.8_15 = (<unnamed-signed:24>) MEM[(struct *)&a];
small.c:15:1: internal compiler error: verify_gimple failed
0xbfa87f verify_gimple_in_cfg(function*, bool)
../../gcc-source-trunk/gcc/tree-cfg.c:5166
0xae9152 execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1968
0xae9b2b execute_todo
../../gcc-source-trunk/gcc/passes.c:2020
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.
$
-----------------------------
struct
{
int f0:24;
} a, c, d;
int b;
int
fn1 ()
{
return 0;
}
void
fn2 ()
{
int e;
if (b)
for (; e;)
{
d = c;
if (fn1 (b))
b = a.f0;
}
}
>From gcc-bugs-return-524413-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 20:27:11 2016
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From: "wschmidt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70957] testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on power7
Date: Fri, 06 May 2016 20:27:00 -0000
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--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
I applied the same patch to gcc-6-branch, and the test works correctly on a
Power7 machine. Thus we appear to be exposing a recent problem introduced on
trunk. I'll try to bisect this.
>From gcc-bugs-return-524414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 20:31:20 2016
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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++/70983] False ambiguity on member function rvalue overload using auto
Date: Fri, 06 May 2016 20:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70983
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Last reconfirmed| |2016-5-6
CC| |msebor at gcc dot gnu.org
Known to fail| |4.9.3, 5.3.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with 5.3.0 and 4.9.3 in C++ 14 mode. GCC 6.1.0 and 7.0 accept the
program as expected.
$ cat xxx.c && ~/bin/gcc-5.1.0/bin/g++ -Wall -Wextra -Wpedantic -std=c++14
-xc++ xxx.c
template <class T> struct RR { typedef T U; };
template <class T> struct RR<T&> { typedef T U; };
template <class T>
typename RR<T>::U&&
move (T &&t) { return static_cast<typename RR<T>::U&&>(t); }
struct Foo
{
int& Get () & { return m; }
int&& Get () && { return move (m); }
auto& GetAuto() & { return m; }
auto&& GetAuto() && { return move (m); }
int m;
};
int main()
{
Foo foo;
int A = foo.Get (); // works
int B = foo.GetAuto (); // call is ambiguous
}
xxx.c: In function ‘int main()’:
xxx.c:23:26: error: call of overloaded ‘GetAuto()’ is ambiguous
int B = foo.GetAuto (); // call is ambiguous
^
xxx.c:13:12: note: candidate: auto& Foo::GetAuto()
auto& GetAuto() & { return m; }
^
xxx.c:14:12: note: candidate: auto&& Foo::GetAuto()
auto&& GetAuto() && { return move (m); }
^
xxx.c:22:9: warning: unused variable ‘A’ [-Wunused-variable]
int A = foo.Get (); // works
^
xxx.c:23:9: warning: unused variable ‘B’ [-Wunused-variable]
int B = foo.GetAuto (); // call is ambiguous
^
>From gcc-bugs-return-524415-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 20:31:31 2016
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Subject: [Bug c++/70983] False ambiguity on member function rvalue overload using auto
Date: Fri, 06 May 2016 20:31:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Ever confirmed|0 |1
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70986] New: ICE on valid code at -O3 on x86_64-linux-gnu in combine_blocks, at tree-if-conv.c:2219
Date: Fri, 06 May 2016 20:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70986
Bug ID: 70986
Summary: ICE on valid code at -O3 on x86_64-linux-gnu in
combine_blocks, at tree-if-conv.c:2219
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current gcc trunk at
-O3 on x86_64-linux-gnu in both 32-bit and 64-bit modes.
$ 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/7.0.0/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 7.0.0 20160506 (experimental) [trunk revision 235952] (GCC)
$
$ gcc-trunk -O2 -c small.c
$
$ gcc-trunk -O3 -c small.c
small.c: In function ‘fn2’:
small.c:12:1: internal compiler error: in combine_blocks, at
tree-if-conv.c:2219
fn2 ()
^~~
0xc1ffb7 combine_blocks
../../gcc-source-trunk/gcc/tree-if-conv.c:2219
0xc2264f tree_if_conversion
../../gcc-source-trunk/gcc/tree-if-conv.c:2741
0xc2264f execute
../../gcc-source-trunk/gcc/tree-if-conv.c:2829
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.
$
------------------------------------------------------
int a, g;
char b, c;
short d, e, f;
char
fn1 ()
{
return a ? a : 1;
}
void
fn2 ()
{
char h;
for (; d;)
for (; e; e++)
c = (fn1 () && h) & !(f |= 9 ^ (b > (g = c)));
for (;;)
;
}
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Subject: [Bug tree-optimization/70956] [6/7 Regression] ICE in build_cross_bb_scalars_def, at graphite-scop-detection.c:1725
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Subject: [Bug target/70957] testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on power7
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--- Comment #6 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
The test also passed on P7 at the time I committed the patch.
>From gcc-bugs-return-524420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri May 06 23:45:47 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70987] New: missing -Wuninitialized calling built-in string functions with an uninitialized argument
Date: Fri, 06 May 2016 23:45:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70987
Bug ID: 70987
Summary: missing -Wuninitialized calling built-in string
functions with an uninitialized argument
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
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In the program below, all functions access elements of the uninitialized local
array, but only the first one causes a warning. The rest that make use of the
built-in functions do not. The same problem exists when calling the
corresponding library functions (with or without _FORTIFY_SOURCE defined).
The uninitialized warning should be issued even for built-ins and for the
corresponding library functions that GCC has knowledge of.
$ cat zzz.c && gcc -O2 -S -Wall -Wextra -Wpedantic zzz.c
void f0 (char*);
void f1 (void)
{
char a [4];
unsigned n = 0;
for (char *p = a; *p; ++n, ++p);
f0 (a + n);
}
void f2 (void)
{
char a [4];
unsigned n = __builtin_strlen (a);
f0 (a + n);
}
void f3 (void)
{
char a [4];
__builtin_strcat (a, "abc");
f0 (a);
}
void f4 (void)
{
char a [4];
char b [4];
__builtin_strcpy (a, b);
f0 (a);
}
zzz.c: In function ‘f1’:
zzz.c:8:21: warning: ‘a’ is used uninitialized in this function
[-Wuninitialize]
for (char *p = a; *p; ++n, ++p);
^~
>From gcc-bugs-return-524421-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 00:12:29 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70988] New: missing buffer overflow warning on chained strcat calls
Date: Sat, 07 May 2016 00:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70988
Bug ID: 70988
Summary: missing buffer overflow warning on chained strcat
calls
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
In the program below, all of f1 through f4 clearly write past the end of the
destination buffer. However, only f1 and f2 cause a warning about the
overflow. f3 and f4 do not. Since chaining calls to strcat (or strcpy
followed by strcat) is not an uncommon idiom, it might be worth checking for
and diagnosing buffer overflow in it at compile time. I suspect that doing so
would also improve the generated code since in the absence of overflow chained
calls like 'strcat (strcat (a, "abc"), "def")' would be merged into a single
call to __builtin_memcpy.
$ cat t.c && /build/gcc-6.1.0/gcc/xgcc -B/build/gcc-6.1.0/gcc
-D_FORTIFY_SOURCE=1 -O2 -Wall -Wextra -Wpedantic t.c
#include <string.h>
#define NOINLINE __attribute__ ((noclone, noinline))
void NOINLINE f0 (char *s) { __builtin_puts (s); }
void NOINLINE f1 (void)
{
char a [4];
strcat (a, "abcdef");
f0 (a);
}
void NOINLINE f2 (void)
{
char a [4] = "";
strcat (a, "abcdef");
f0 (a);
}
void NOINLINE f3 (void)
{
char a [4];
strcat (strcat (a, "abc"), "def");
f0 (a);
}
void NOINLINE f4 (void)
{
char a [4] = "";
strcat (strcat (a, "abc"), "def");
f0 (a);
}
int main ()
{
f1 ();
f2 ();
f3 ();
f4 ();
}
In file included from /usr/include/string.h:638:0,
from t.c:1:
In function ‘strcat’,
inlined from ‘f1’ at t.c:10:3:
/usr/include/bits/string3.h:142:10: warning: call to __builtin___strcat_chk
will always overflow destination buffer
return __builtin___strcat_chk (__dest, __src, __bos (__dest));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function ‘strcat’,
inlined from ‘f2’ at t.c:17:3:
/usr/include/bits/string3.h:142:10: warning: call to __builtin___memcpy_chk
will always overflow destination buffer
return __builtin___strcat_chk (__dest, __src, __bos (__dest));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Subject: [Bug middle-end/70795] [7 Regression] gcc/libjava/interpret.cc:1948:1: ICE: in binds_to_current_def_p, at symtab.c:2232
Date: Sat, 07 May 2016 00:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70795
John David Anglin <danglin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> ---
r235317 was okay.
>From gcc-bugs-return-524423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 00:56:11 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/26904] A template named the same as its member confuses lookup through inheritance
Date: Sat, 07 May 2016 00:56:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Known to work| |4.9.3, 5.3.0, 6.1.0
Resolution|--- |FIXED
--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
The test case compiles with today's trunk (7.0) as well all supported versions
(all the way back to 4.9.3). Resolving as Fixed.
>From gcc-bugs-return-524424-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 02:55:23 2016
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70989] New: [SH] Further improve utilization of zero-displacement conditional branches
Date: Sat, 07 May 2016 02:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70989
Bug ID: 70989
Summary: [SH] Further improve utilization of zero-displacement
conditional branches
Product: gcc
Version: 6.0
Status: UNCONFIRMED
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Created attachment 38432
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38432&action=edit
Simplify SH abs patterns
The change in r235993 disables the delay branch for conditional branches during
the DBR pass, if the branch skips a single instruction. This improves the
utilization of zero-displacement cbranches.
There are still some cases where other basic block optimizations would reorder
blocks in a way which makes zero-displacement cbranches impossible to use.
For example, when the abs patterns are simplified we get the following code in
CSiBE (cg_compiler_opensrc/compile.c).
Before:
.L872:
cmp/pz r6
mov.l .L1024,r13
mov r6,r1
bt 0f
neg r6,r1
0:
mov.l r1,@(32,r15)
After:
.L872:
cmp/pz r6
bt/s .L1004
mov.l r6,@(32,r15)
bra .L1010
neg r6,r1
.L1004:
mov.l @(32,r15),r2
....
< many blocks here >
...
.L1010:
bra .L1004
mov.l r1,@(32,r15)
.align 1
.L1015:
With -fno-reorder-blocks it's a bit better (from the branching point of view):
L818:
cmp/pz r6
bt/s .L950
mov.l r6,@(32,r15)
neg r6,r1
mov.l r1,@(32,r15)
.L950:
mov.l @(32,r15),r2
And with -fno-reorder-blocks -fno-delayed-branch it's clear that it's almost
impossible to recover the zero-displacement branch at this stage anymore:
.L794:
cmp/pz r6
mov.l r6,@(32,r15)
bt .L926
neg r6,r1
mov.l r1,@(32,r15)
.L926:
mov.l @(32,r15),r2
Disallowing transformation of 1-insn cbranches in the bb-reorder pass might
lead to some improvements, but I guess that these 1-insn branches have to be
"pinned" much earlier during compilation to get better results.
>From gcc-bugs-return-524425-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 03:02:17 2016
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Subject: [Bug target/70990] New: [SH] Unreachable basic blocks
Date: Sat, 07 May 2016 03:02:00 -0000
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Bug ID: 70990
Summary: [SH] Unreachable basic blocks
Product: gcc
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Target: sh*-*-*
In CSiBE cg_compiler_opensrc/compile.c I've spotted the following code:
.align 1
.L1012:
mov #7,r5
jsr @r1
mov #24,r4
mov.l @(8,r15),r1
mov r0,r11
mov.l @r1,r2
bra .L891
mov.l r2,@(4,r0)
bra .L908 <<< unreachable branch
nop
.align 1
.L1010:
mov.l .L1064,r0
mov.l @(8,r15),r2
mov.l @r9,r5
mov.l @r2,r7
>From gcc-bugs-return-524426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 03:51:22 2016
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Subject: [Bug c++/70991] New: Uninitialized class allowed if it came from self-assignment, or a member function
Date: Sat, 07 May 2016 03:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70991
Bug ID: 70991
Summary: Uninitialized class allowed if it came from
self-assignment, or a member function
Product: gcc
Version: 5.3.1
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g++ allows uninitialized class to be used for member variables (hitting
uninitialized memory), if the class was declared as an assignment to itself.
It's not clear whether this violates the C++ standard (it sure seems like it
would), but at the very least compiling with `g++ -Wall -Wextra test.cpp`
should generate a warning.
>From gcc-bugs-return-524427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 03:52:43 2016
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Subject: [Bug c++/70991] Uninitialized class allowed if it came from self-assignment, or a member function
Date: Sat, 07 May 2016 03:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70991
--- Comment #1 from bennet brauer <appfault at hotmail dot com> ---
Created attachment 38433
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38433&action=edit
two similar test cases in one cpp file
>From gcc-bugs-return-524428-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 06:47:56 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70956] [6/7 Regression] ICE in build_cross_bb_scalars_def, at graphite-scop-detection.c:1725
Date: Sat, 07 May 2016 06:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70956
--- Comment #3 from vries at gcc dot gnu.org ---
Author: vries
Date: Sat May 7 06:47:07 2016
New Revision: 235994
URL: https://gcc.gnu.org/viewcvs?rev=235994&root=gcc&view=rev
Log:
Handle NULL def in build_cross_bb_scalars_def
2016-05-07 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/70956
* graphite-scop-detection.c (build_cross_bb_scalars_def): Handle NULL
def.
* gcc.dg/graphite/pr70956.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/graphite/pr70956.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/graphite-scop-detection.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/70956] [6/7 Regression] ICE in build_cross_bb_scalars_def, at graphite-scop-detection.c:1725
Date: Sat, 07 May 2016 07:03:00 -0000
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--- Comment #4 from vries at gcc dot gnu.org ---
Author: vries
Date: Sat May 7 07:02:36 2016
New Revision: 235995
URL: https://gcc.gnu.org/viewcvs?rev=235995&root=gcc&view=rev
Log:
backport "Handle NULL def in build_cross_bb_scalars_def"
2016-05-07 Tom de Vries <tom@codesourcery.com>
backport:
2016-05-07 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/70956
* graphite-scop-detection.c (build_cross_bb_scalars_def): Handle NULL
def.
* gcc.dg/graphite/pr70956.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/graphite/pr70956.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/graphite-scop-detection.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-524430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 07:19:17 2016
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70992] New: Infinite recursion between fold_build2_stat_loc and fold_binary_loc w/ -fwrapv
Date: Sat, 07 May 2016 07:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70992
Bug ID: 70992
Summary: Infinite recursion between fold_build2_stat_loc and
fold_binary_loc w/ -fwrapv
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
1. Deep recursion between fold_binary_loc() and fold_build2_stat_loc() causes
cc1 to ICE on the following reduced testcase when compiling w/ -fwrapv:
unsigned int *od;
int wy = (0 % 0 + 1) * *od * 2;
% x86_64-unknown-linux-gnu-gcc-7.0.0-alpha20160501 -c -fwrapv zrcoshfy.c
zrcoshfy.c:2:13: warning: division by zero [-Wdiv-by-zero]
int wy = (0 % 0 + 1) * *od * 2;
^
x86_64-unknown-linux-gnu-gcc-7.0.0-alpha20160501: internal compiler error:
Segmentation fault (program cc1)
#0 0x00000000008a2d24 in operand_equal_p(tree_node const*, tree_node const*,
unsigned int) ()
#1 0x00000000008a2be0 in operand_equal_p(tree_node const*, tree_node const*,
unsigned int) ()
#2 0x0000000000fbb046 in generic_simplify_PLUS_EXPR(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) [clone .isra.217] ()
#3 0x0000000000fdf25e in generic_simplify(unsigned int, tree_code, tree_node*,
tree_node*, tree_node*) ()
#4 0x00000000008b44bc in fold_binary_loc(unsigned int, tree_code, tree_node*,
tree_node*, tree_node*) ()
#5 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#6 0x00000000005a2d82 in fold_plusminus_mult_expr(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#7 0x00000000008b6184 in fold_binary_loc(unsigned int, tree_code, tree_node*,
tree_node*, tree_node*) ()
#8 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#9 0x00000000008cf9d0 in extract_muldiv(tree_node*, tree_node*, tree_code,
tree_node*, bool*) ()
#10 0x00000000008b9d69 in fold_binary_loc(unsigned int, tree_code, tree_node*,
tree_node*, tree_node*) ()
#11 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#12 0x00000000008b6184 in fold_binary_loc(unsigned int, tree_code, tree_node*,
tree_node*, tree_node*) ()
#13 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#14 0x00000000008cf9d0 in extract_muldiv(tree_node*, tree_node*, tree_code,
tree_node*, bool*) ()
#15 0x00000000008d022e in extract_muldiv(tree_node*, tree_node*, tree_code,
tree_node*, bool*) ()
#16 0x00000000008b9d69 in fold_binary_loc(unsigned int, tree_code, tree_node*,
tree_node*, tree_node*) ()
#17 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
<…>
#190618 0x00000000008b6f03 in fold_binary_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#190619 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#190620 0x00000000008d01e1 in extract_muldiv(tree_node*, tree_node*, tree_code,
tree_node*, bool*) ()
#190621 0x00000000008b9d69 in fold_binary_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#190622 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#190623 0x00000000008c0fa0 in fold_build2_initializer_loc(unsigned int,
tree_code, tree_node*, tree_node*, tree_node*) ()
#190624 0x00000000006ad649 in c_fully_fold_internal(tree_node*, bool, bool*,
bool*, bool) ()
#190625 0x00000000006b0a2c in c_fully_fold(tree_node*, bool, bool*) ()
#190626 0x000000000065a1ac in digest_init(unsigned int, tree_node*, tree_node*,
tree_node*, bool, bool, int) ()
#190627 0x000000000065c8d8 in store_init_value(unsigned int, tree_node*,
tree_node*, tree_node*) ()
#190628 0x00000000006321e9 in finish_decl(tree_node*, unsigned int, tree_node*,
tree_node*, tree_node*) ()
#190629 0x0000000000696fda in c_parser_declaration_or_fndef(c_parser*, bool,
bool, bool, bool, bool, tree_node**, vec<c_token, va_heap, vl_ptr>, tree_node*)
()
#190630 0x00000000006a3837 in c_parser_external_declaration(c_parser*) ()
#190631 0x00000000006a42b3 in c_parse_file() ()
#190632 0x0000000000707f73 in c_common_parse_file() ()
#190633 0x0000000000b9cd1e in compile_file() ()
#190634 0x00000000006173f3 in toplev::main(int, char**) ()
#190635 0x0000000000619637 in main ()
2. Changing "0 % 0" to "1 % 0" leads to a slightly different trace:
#0 0x0000000000e9e9f0 in wi::mul_internal(long*, long const*, unsigned int,
long const*, unsigned int, unsigned int, signop, bool*, bool) ()
#1 0x00000000008af916 in int_const_binop_1(tree_code, tree_node const*,
tree_node const*, int) ()
#2 0x00000000008c4a38 in const_binop(tree_code, tree_node*, tree_node*) ()
#3 0x00000000008cfb71 in extract_muldiv(tree_node*, tree_node*, tree_code,
tree_node*, bool*) ()
#4 0x00000000008b9d69 in fold_binary_loc(unsigned int, tree_code, tree_node*,
tree_node*, tree_node*) ()
#5 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#6 0x00000000008b6184 in fold_binary_loc(unsigned int, tree_code, tree_node*,
tree_node*, tree_node*) ()
#7 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#8 0x00000000008cf9d0 in extract_muldiv(tree_node*, tree_node*, tree_code,
tree_node*, bool*) ()
#9 0x00000000008d022e in extract_muldiv(tree_node*, tree_node*, tree_code,
tree_node*, bool*) ()
#10 0x00000000008b9d69 in fold_binary_loc(unsigned int, tree_code, tree_node*,
tree_node*, tree_node*) ()
#11 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
<…>
#190616 0x00000000008b6f03 in fold_binary_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#190617 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#190618 0x00000000008d01e1 in extract_muldiv(tree_node*, tree_node*, tree_code,
tree_node*, bool*) ()
#190619 0x00000000008b9d69 in fold_binary_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#190620 0x00000000008c05cb in fold_build2_stat_loc(unsigned int, tree_code,
tree_node*, tree_node*, tree_node*) ()
#190621 0x00000000008c0fa0 in fold_build2_initializer_loc(unsigned int,
tree_code, tree_node*, tree_node*, tree_node*) ()
#190622 0x00000000006ad649 in c_fully_fold_internal(tree_node*, bool, bool*,
bool*, bool) ()
#190623 0x00000000006b0a2c in c_fully_fold(tree_node*, bool, bool*) ()
#190624 0x000000000065a1ac in digest_init(unsigned int, tree_node*, tree_node*,
tree_node*, bool, bool, int) ()
#190625 0x000000000065c8d8 in store_init_value(unsigned int, tree_node*,
tree_node*, tree_node*) ()
#190626 0x00000000006321e9 in finish_decl(tree_node*, unsigned int, tree_node*,
tree_node*, tree_node*) ()
#190627 0x0000000000696fda in c_parser_declaration_or_fndef(c_parser*, bool,
bool, bool, bool, bool, tree_node**, vec<c_token, va_heap, vl_ptr>, tree_node*)
()
#190628 0x00000000006a3837 in c_parser_external_declaration(c_parser*) ()
#190629 0x00000000006a42b3 in c_parse_file() ()
#190630 0x0000000000707f73 in c_common_parse_file() ()
#190631 0x0000000000b9cd1e in compile_file() ()
#190632 0x00000000006173f3 in toplev::main(int, char**) ()
#190633 0x0000000000619637 in main ()
>From gcc-bugs-return-524431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 07:35:08 2016
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70956] [6/7 Regression] ICE in build_cross_bb_scalars_def, at graphite-scop-detection.c:1725
Date: Sat, 07 May 2016 07:35:00 -0000
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vries at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Assignee|unassigned at gcc dot gnu.org |vries at gcc dot gnu.org
--- Comment #5 from vries at gcc dot gnu.org ---
Patch with test-case committed to trunk, backported to 6 branch. Marking
resolved-fixed.
>From gcc-bugs-return-524432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 09:15:56 2016
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70989] [SH] Further improve utilization of zero-displacement conditional branches
Date: Sat, 07 May 2016 09:15:00 -0000
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--- Comment #1 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Another case from bzlib.c:
.L820:
bt .L823
mov.l r0,@r7
.L823:
tst r11,r11
bt/s .L824 <<< convert to zero-displacement cbranch
mov #0,r1 <<< move common insn from successor bb to this bb
mov.l r1,@r11
.L824:
tst r12,r12
bt/s .L825
mov #0,r1 <<< likewise
mov.l r1,@r12
.L825:
result (1):
.L820:
bt .L823
mov.l r0,@r7
.L823:
tst r11,r11
mov #0,r1 <<< now r1 can be propagated into successor blocks
bt .L824
mov.l r1,@r11
.L824:
mov #0,r1
tst r12,r12
bt .L825
mov.l r1,@r12
.L825:
result (2):
.L820:
bt .L823
mov.l r0,@r7
.L823:
tst r11,r11
mov #0,r1
bt .L824
mov.l r1,@r11
.L824:
tst r12,r12
bt .L825
mov.l r1,@r12
.L825:
>From gcc-bugs-return-524433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 09:25:15 2016
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Subject: =?UTF-8?B?W0J1ZyBmb3J0cmFuLzcwOTM3XSBbNyBSZWdyZXNzaW9uXSBJQ0U6IHRyZWUg?= =?UTF-8?B?Y29kZSDigJhzc2FfbmFtZeKAmSBpcyBub3Qgc3VwcG9ydGVkIGluIExUTyBz?= =?UTF-8?B?dHJlYW1z?Date: Sat, 07 May 2016 09:25:00 -0000
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--- Comment #14 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The patch in comment 13 fixes the regression without creating new one.
>From gcc-bugs-return-524434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 09:30:45 2016
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Subject: [Bug c++/70977] [6/7 Regression] Out of memory during compilation of facebook/wangle (flag c++0x works, flag c++14 fails).
Date: Sat, 07 May 2016 09:30:00 -0000
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--- Comment #7 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 tmp % cat Acceptor-c++14.ii
namespace __gnu_cxx {
namespace __ops {
struct _Iter_less_iter {
template <typename _Iterator1, typename _Iterator2>
constexpr int operator()(_Iterator1, _Iterator2 __it2) {
return *__it2;
}
};
constexpr _Iter_less_iter __iter_less_iter() { return _Iter_less_iter(); }
}
}
namespace std {
template <class> struct initializer_list {
typedef int *const_iterator;
int *_M_array;
unsigned long size;
constexpr const_iterator begin() { return _M_array; }
constexpr const_iterator end() { return 0; }
};
template <typename _FIter> constexpr _FIter max_element(_FIter, _FIter);
template <typename _Tp> constexpr _Tp max(initializer_list<_Tp> __l) {
max_element(__l.begin(), __l.end());
}
template <typename _ForwardIterator, typename _Compare>
constexpr _ForwardIterator __max_element(_ForwardIterator __first,
_ForwardIterator, _Compare __comp) {
__comp(0, __first);
}
template <typename _ForwardIterator>
constexpr _ForwardIterator max_element(_ForwardIterator __first,
_ForwardIterator __last) {
__max_element(__first, __last, __gnu_cxx::__ops::__iter_less_iter());
}
template <class> void estimateSpaceNeeded() {
const int kMaxPositiveSpace = max({0});
}
}
markus@x4 tmp % g++ -c Acceptor-c++14.ii
<<OOM killer kicks in>>
>From gcc-bugs-return-524435-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 11:46:52 2016
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From: "vincenzo.innocente at cern dot ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/70993] New: ICE with gcov and lto
Date: Sat, 07 May 2016 11:46:00 -0000
X-Bugzilla-Reason: CC
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: gcov-profile
X-Bugzilla-Version: 7.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70993
Bug ID: 70993
Summary: ICE with gcov and lto
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: gcov-profile
Assignee: unassigned at gcc dot gnu.org
Reporter: vincenzo.innocente at cern dot ch
Target Milestone: ---
with gcc version 7.0.0 20160506 (experimental) [trunk revision 235977] (GCC)
cat main.cpp
int main() { return 0;}
c++ -O2 main.cpp
perf record -e
cpu/event=0xc4,umask=0x20,name=br_inst_retired_near_taken,period=400009/ -o
perf.data ./a.out
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.016 MB perf.data (1 samples) ]
create_gcov --binary=./a.out --profile=perf.data --gcov=fbdata.afdo
-gcov_version 1
c++ -O2 main.cpp -fauto-profile -flto
lto1: internal compiler error: in compute_working_sets, at gcov-io.c:1006
0x6fee03 compute_working_sets(gcov_ctr_summary const*, gcov_working_set_info*)
../../gcc-trunk/gcc/gcov-io.c:1006
0xa1a72d get_working_sets()
../../gcc-trunk/gcc/profile.c:226
0x97cd1a input_symtab()
../../gcc-trunk/gcc/lto-cgraph.c:1869
0x6634a7 read_cgraph_and_symbols
../../gcc-trunk/gcc/lto/lto.c:2856
0x6634a7 lto_main()
../../gcc-trunk/gcc/lto/lto.c:3305
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.
lto-wrapper: fatal error: c++ returned 1 exit status
compilation terminated.
/usr/bin/ld: lto-wrapper failed
collect2: error: ld returned 1 exit status
>From gcc-bugs-return-524436-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 12:13:57 2016
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From: "physiker at toast2 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70994] New: gfortran: -fcheck=all implied do loop confusing messages
Date: Sat, 07 May 2016 12:13:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Component: fortran
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Content-length: 17363
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70994
Bug ID: 70994
Summary: gfortran: -fcheck=all implied do loop confusing
messages
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: physiker at toast2 dot net
Target Milestone: ---
Compiling the file f.90 with the command line option -fcheck=all active, causes
the "Warning: 'i' may be used uninitialized in this function
[-Wmaybe-uninitialized]". When the -fcheck=all option is removed, there is no
warning. Executing the compiled code causes an error termination.
gfortran-6: At line 8 of file f.f90
Fortran runtime error: Substring out of bounds: upper bound (32767) of 'name'
exceeds string length (22)
gfortran-5: At line 8 of file f.f90
Fortran runtime error: Substring out of bounds: lower bound (0) of 'name' is
less than one
When the variable i is initialized,e.g. i=1, there is no runtime error message.Â
f.f90
subroutine f(name)
  implicit none
  character(len=*), intent(in)          :: name
  character, dimension(512)              :: cname
  integer                                :: i
  cname(1:len_trim(name)+1) = (/ ( name(i:i), i = 1,len_trim(name) ), char(0)
/)
end subroutine f
program t
  implicit none
  character(len=22)          :: name
  name = 'abcdefghijklmnopqr    '
  call f(name)
end program t
LANG=C gfortran-fsf-6 -v -W -Wall -fcheck=all f.f90
Driving: gfortran-fsf-6 -v -W -Wall -fcheck=all f.f90
-mmacosx-version-min=10.9.4 -l gfortran -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran-fsf-6
COLLECT_LTO_WRAPPER=/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/6.1.0/lto-wrapper
Target: x86_64-apple-darwin13.4.0
Configured with: ../gcc-6.1.0/configure --prefix=/sw --prefix=/sw/lib/gcc6
--mandir=/sw/share/man --infodir=/sw/lib/gcc6/info
--enable-languages=c,c++,fortran,lto,objc,obj-c++,java --with-gmp=/sw
--with-libiconv-prefix=/sw --with-isl=/sw --with-mpc=/sw --with-system-zlib
--program-suffix=-fsf-6
Thread model: posix
gcc version 6.1.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-Wextra' '-Wall' '-fcheck=all'
'-mmacosx-version-min=10.9.4' '-shared-libgcc' '-mtune=core2'
/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/6.1.0/f951 f.f90 -fPIC
-quiet -dumpbase f.f90 -mmacosx-version-min=10.9.4 -mtune=core2 -auxbase f
-Wextra -Wall -version -fcheck=all -fintrinsic-modules-path
/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/finclude -o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//ccD8RIOC.s
GNU Fortran (GCC) version 6.1.0 (x86_64-apple-darwin13.4.0)
        compiled by GNU C version 6.1.0, 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 Fortran2008 (GCC) version 6.1.0 (x86_64-apple-darwin13.4.0)
        compiled by GNU C version 6.1.0, 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
f.f90:8:0:
  cname(1:len_trim(name)+1) = (/ ( name(i:i), i = 1,len_trim(name) ), char(0)
/)
Warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
COLLECT_GCC_OPTIONS='-v' '-Wextra' '-Wall' '-fcheck=all'
'-mmacosx-version-min=10.9.4' '-shared-libgcc' '-mtune=core2'
as -arch x86_64 -force_cpusubtype_ALL -o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc66pKlk.o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//ccD8RIOC.s
Reading specs from
/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/../../../libgfortran.spec
rename spec lib to liborig
COLLECT_GCC_OPTIONS='-v' '-Wextra' '-Wall' '-fcheck=all'
'-mmacosx-version-min=10.9.4' '-shared-libgcc' '-mtune=core2'
COMPILER_PATH=/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/6.1.0/:/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/6.1.0/:/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/:/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/:/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/
LIBRARY_PATH=/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/:/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/../../../
COLLECT_GCC_OPTIONS='-v' '-Wextra' '-Wall' '-fcheck=all'
'-mmacosx-version-min=10.9.4' '-shared-libgcc' '-mtune=core2'
/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/6.1.0/collect2 -dynamic
-arch x86_64 -macosx_version_min 10.9.4 -weak_reference_mismatches non-weak -o
a.out -L/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0
-L/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/../../..
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc66pKlk.o -lgfortran
-no_compact_unwind -lSystem -lgcc_ext.10.5 -lgcc -lquadmath -lm -lgcc_ext.10.5
-lgcc -lSystem -v
collect2 version 6.1.0
/usr/bin/ld -dynamic -arch x86_64 -macosx_version_min 10.9.4
-weak_reference_mismatches non-weak -o a.out
-L/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0
-L/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/../../..
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc66pKlk.o -lgfortran
-no_compact_unwind -lSystem -lgcc_ext.10.5 -lgcc -lquadmath -lm -lgcc_ext.10.5
-lgcc -lSystem -v
@(#)PROGRAM:ld  PROJECT:ld64-241.9
configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h
armv6m armv7m armv7em
Library search paths:
        /sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0
        /sw/lib/gcc6/lib
        /usr/lib
        /usr/local/lib
Framework search paths:
        /Library/Frameworks/
        /System/Library/Frameworks/
/usr/bin/nm -n /var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc66pKlk.o
Compilation finished at Sat May  7 13:35:36
bash-3.2$ ./a.out
At line 8 of file f.f90
Fortran runtime error: Substring out of bounds: upper bound (32767) of 'name'
exceeds string length (22)
Error termination. Backtrace:
#0Â Â 0x104946749
#1Â Â 0x104947415
#2Â Â 0x1049477ba
#3Â Â 0x10493ea2a
#4Â Â 0x10493ec44
#5Â Â 0x10493ec86
LANG=C gfortran-fsf-5 -v -W -Wall -fcheck=all f.f90
Driving: gfortran-fsf-5 -mmacosx-version-min=10.9.4 -v -W -Wall -fcheck=all
f.f90 -l gfortran -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran-fsf-5
COLLECT_LTO_WRAPPER=/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/5.3.0/lto-wrapper
Target: x86_64-apple-darwin13.4.0
Configured with: ../gcc-5.3.0/configure --prefix=/sw --prefix=/sw/lib/gcc5
--mandir=/sw/share/man --infodir=/sw/lib/gcc5/info
--enable-languages=c,c++,fortran,lto,objc,obj-c++,java --with-gmp=/sw
--with-libiconv-prefix=/sw --with-isl=/sw --with-mpc=/sw --with-system-zlib
--program-suffix=-fsf-5
Thread model: posix
gcc version 5.3.0 (GCC)
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.9.4' '-v' '-Wextra' '-Wall'
'-fcheck=all' '-shared-libgcc' '-mtune=core2'
/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/5.3.0/f951 f.f90 -fPIC
-quiet -dumpbase f.f90 -mmacosx-version-min=10.9.4 -mtune=core2 -auxbase f
-Wextra -Wall -version -fcheck=all -fintrinsic-modules-path
/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/finclude -o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc8Us4wE.s
GNU Fortran (GCC) version 5.3.0 (x86_64-apple-darwin13.4.0)
        compiled by GNU C version 5.3.0, GMP version 6.0.0, MPFR version 3.1.3,
MPC version 1.0.3
warning: GMP header version 6.0.0 differs from library version 6.1.0.
warning: MPFR header version 3.1.3 differs from library version 3.1.4.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran2008 (GCC) version 5.3.0 (x86_64-apple-darwin13.4.0)
        compiled by GNU C version 5.3.0, GMP version 6.0.0, MPFR version 3.1.3,
MPC version 1.0.3
warning: GMP header version 6.0.0 differs from library version 6.1.0.
warning: MPFR header version 3.1.3 differs from library version 3.1.4.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
f.f90:8:0:
  cname(1:len_trim(name)+1) = (/ ( name(i:i), i = 1,len_trim(name) ), char(0)
^
Warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.9.4' '-v' '-Wextra' '-Wall'
'-fcheck=all' '-shared-libgcc' '-mtune=core2'
as -arch x86_64 -force_cpusubtype_ALL -o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc9CbUa9.o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc8Us4wE.s
Reading specs from
/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/../../../libgfortran.spec
rename spec lib to liborig
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.9.4' '-v' '-Wextra' '-Wall'
'-fcheck=all' '-shared-libgcc' '-mtune=core2'
COMPILER_PATH=/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/5.3.0/:/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/5.3.0/:/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/:/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/:/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/
LIBRARY_PATH=/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/:/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/../../../:/usr/lib/
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.9.4' '-v' '-Wextra' '-Wall'
'-fcheck=all' '-shared-libgcc' '-mtune=core2'
/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/5.3.0/collect2 -dynamic
-arch x86_64 -macosx_version_min 10.9.4 -weak_reference_mismatches non-weak -o
a.out -L/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0
-L/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/../../..
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc9CbUa9.o -lgfortran
-no_compact_unwind -lSystem -lgcc_ext.10.5 -lgcc -lquadmath -lm -lgcc_ext.10.5
-lgcc -lSystem -v
collect2 version 5.3.0
/usr/bin/ld -dynamic -arch x86_64 -macosx_version_min 10.9.4
-weak_reference_mismatches non-weak -o a.out
-L/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0
-L/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/../../..
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc9CbUa9.o -lgfortran
-no_compact_unwind -lSystem -lgcc_ext.10.5 -lgcc -lquadmath -lm -lgcc_ext.10.5
-lgcc -lSystem -v
@(#)PROGRAM:ld  PROJECT:ld64-241.9
configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h
armv6m armv7m armv7em
Library search paths:
        /sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0
        /sw/lib/gcc5/lib
        /usr/lib
        /usr/local/lib
Framework search paths:
        /Library/Frameworks/
        /System/Library/Frameworks/
/usr/bin/nm -n /var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc9CbUa9.o
bash-3.2$ ./a.out
At line 8 of file f.f90
Fortran runtime error: Substring out of bounds: upper bound (32767) of 'name'
exceeds string length (22)
Error termination. Backtrace:
#0Â Â 0x104946749
#1Â Â 0x104947415
#2Â Â 0x1049477ba
#3Â Â 0x10493ea2a
#4Â Â 0x10493ec44
#5Â Â 0x10493ec86
LANG=C gfortran-fsf-5 -v -W -Wall -fcheck=all f.f90
Driving: gfortran-fsf-5 -mmacosx-version-min=10.9.4 -v -W -Wall -fcheck=all
f.f90 -l gfortran -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran-fsf-5
COLLECT_LTO_WRAPPER=/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/5.3.0/lto-wrapper
Target: x86_64-apple-darwin13.4.0
Configured with: ../gcc-5.3.0/configure --prefix=/sw --prefix=/sw/lib/gcc5
--mandir=/sw/share/man --infodir=/sw/lib/gcc5/info
--enable-languages=c,c++,fortran,lto,objc,obj-c++,java --with-gmp=/sw
--with-libiconv-prefix=/sw --with-isl=/sw --with-mpc=/sw --with-system-zlib
--program-suffix=-fsf-5
Thread model: posix
gcc version 5.3.0 (GCC)
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.9.4' '-v' '-Wextra' '-Wall'
'-fcheck=all' '-shared-libgcc' '-mtune=core2'
/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/5.3.0/f951 f.f90 -fPIC
-quiet -dumpbase f.f90 -mmacosx-version-min=10.9.4 -mtune=core2 -auxbase f
-Wextra -Wall -version -fcheck=all -fintrinsic-modules-path
/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/finclude -o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc8Us4wE.s
GNU Fortran (GCC) version 5.3.0 (x86_64-apple-darwin13.4.0)
        compiled by GNU C version 5.3.0, GMP version 6.0.0, MPFR version 3.1.3,
MPC version 1.0.3
warning: GMP header version 6.0.0 differs from library version 6.1.0.
warning: MPFR header version 3.1.3 differs from library version 3.1.4.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran2008 (GCC) version 5.3.0 (x86_64-apple-darwin13.4.0)
        compiled by GNU C version 5.3.0, GMP version 6.0.0, MPFR version 3.1.3,
MPC version 1.0.3
warning: GMP header version 6.0.0 differs from library version 6.1.0.
warning: MPFR header version 3.1.3 differs from library version 3.1.4.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
f.f90:8:0:
  cname(1:len_trim(name)+1) = (/ ( name(i:i), i = 1,len_trim(name) ), char(0)
^
Warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.9.4' '-v' '-Wextra' '-Wall'
'-fcheck=all' '-shared-libgcc' '-mtune=core2'
as -arch x86_64 -force_cpusubtype_ALL -o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc9CbUa9.o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc8Us4wE.s
Reading specs from
/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/../../../libgfortran.spec
rename spec lib to liborig
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.9.4' '-v' '-Wextra' '-Wall'
'-fcheck=all' '-shared-libgcc' '-mtune=core2'
COMPILER_PATH=/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/5.3.0/:/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/5.3.0/:/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/:/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/:/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/
LIBRARY_PATH=/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/:/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/../../../:/usr/lib/
COLLECT_GCC_OPTIONS='-mmacosx-version-min=10.9.4' '-v' '-Wextra' '-Wall'
'-fcheck=all' '-shared-libgcc' '-mtune=core2'
/sw/lib/gcc5/libexec/gcc/x86_64-apple-darwin13.4.0/5.3.0/collect2 -dynamic
-arch x86_64 -macosx_version_min 10.9.4 -weak_reference_mismatches non-weak -o
a.out -L/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0
-L/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/../../..
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc9CbUa9.o -lgfortran
-no_compact_unwind -lSystem -lgcc_ext.10.5 -lgcc -lquadmath -lm -lgcc_ext.10.5
-lgcc -lSystem -v
collect2 version 5.3.0
/usr/bin/ld -dynamic -arch x86_64 -macosx_version_min 10.9.4
-weak_reference_mismatches non-weak -o a.out
-L/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0
-L/sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0/../../..
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc9CbUa9.o -lgfortran
-no_compact_unwind -lSystem -lgcc_ext.10.5 -lgcc -lquadmath -lm -lgcc_ext.10.5
-lgcc -lSystem -v
@(#)PROGRAM:ld  PROJECT:ld64-241.9
configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h
armv6m armv7m armv7em
Library search paths:
        /sw/lib/gcc5/lib/gcc/x86_64-apple-darwin13.4.0/5.3.0
        /sw/lib/gcc5/lib
        /usr/lib
        /usr/local/lib
Framework search paths:
        /Library/Frameworks/
        /System/Library/Frameworks/
/usr/bin/nm -n /var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc9CbUa9.o
Compilation finished at Sat May  7 13:37:55
bash-3.2$ ./a.out
At line 8 of file f.f90
Fortran runtime error: Substring out of bounds: lower bound (0) of 'name' is
less than one
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/70853] ICE on pointing to null, in gfc_add_block_to_block, at fortran/trans.c:1599
Date: Sat, 07 May 2016 12:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70853
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-07
Ever confirmed|0 |1
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.6 up to trunk (7.0). Before 4.6 compiling the first test in
comment 0 gives the following error
Error: Pointer bounds remapping at (1) is not yet implemented in gfortran
>From gcc-bugs-return-524438-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 12:46:49 2016
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/70995] New: [SH] rotcl usage results in bloaty code
Date: Sat, 07 May 2016 12:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70995
Bug ID: 70995
Summary: [SH] rotcl usage results in bloaty code
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: olegendo at gcc dot gnu.org
Target Milestone: ---
Target: sh*-*-*
While the following:
unsigned int
test_14 (unsigned int a, int b, int c)
{
bool r = b == c;
return (a << 9) | r;
}
compiles to a minimal sequence (-m4 -O2):
cmp/eq r6,r5
shll8 r4
mov r4,r0
rts
rotcl r0
changing the input values a little:
unsigned int
test_15 (unsigned int a, int b, int c)
{
bool r = b != c;
return (a << 11) | r;
}
results in (-m4 -O2):
cmp/eq r6,r5
movt r1
shll8 r4
tst r1,r1
shll2 r4
mov r4,r0
rts
rotcl r0
and on SH2A (has nott insn):
shll8 r4
cmp/eq r6,r5
shll2 r4
mov r4,r0
nott
rts
rotcl r0
It seems for certain parameters it's better to not use the rotcl insn if the
nott insn is not available, as it saves one insn:
shll8 r4
cmp/eq r6,r5
shll2 r4
mov #-1,r0
negc r0,r0
rts
or r4,r0
>From gcc-bugs-return-524439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 13:18:29 2016
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Subject: [Bug fortran/70994] gfortran: -fcheck=all implied do loop confusing messages
Date: Sat, 07 May 2016 13:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70994
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-07
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed from 4.5 up to trunk (7.0). Note that the code compiled with 4.4.7
and '-Wall -fbounds-check' executes without error.
Work-around
subroutine f(name)
implicit none
character(len=*), intent(in) :: name
character, dimension(512) :: cname
integer :: i, l
l = len_trim(name)
i = l
cname(1:len_trim(name)+1) = (/ ( name(i:i), i = 1,len_trim(name) ), char(0)
/)
end subroutine f
program t
implicit none
character(len=22) :: name
name = 'abcdefghijklmnopqr '
call f(name)
end program t
>From gcc-bugs-return-524440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 14:14:02 2016
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From: "magum1977 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70996] New: deadlock on compilation sequence of operator<<
Date: Sat, 07 May 2016 14:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70996
Bug ID: 70996
Summary: deadlock on compilation sequence of operator<<
Product: gcc
Version: 6.1.1
Status: UNCONFIRMED
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Priority: P3
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Created attachment 38434
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38434&action=edit
compilation of this src is endless
Code like below
error() << "call() wrong id got:" << hex << (unsigned)op2()
<< " expect:" << (unsigned)op3() << '\n'
<< dec
<< " toSend op: " << (unsigned)op() << '\n'
<< " response msgid:" << (unsigned)op2() << '\n'
<< " response len: " << (unsigned)op3() << '\n'
<< " response op: " << op4() << '\n'
<< endl;
with logger class which implement several overrided operator<<
leads to infinite compilation.
during infinite compilation cc1plus takes about 8% CPU.
see src example in attach
i compile it in c++98 mode with following options:
g++ -pipe -c -msse2 -m64 -MD -Wno-trigraphs -Wno-multichar -Wformat
-Wno-format-extra-args -ffunction-sections -fdata-sections
-fno-omit-frame-pointer -ffast-math -ffinite-math-only -minline-all-stringops
-std=c++98 -fconserve-space -Wno-invalid-offsetof -I /usr/include -g
-fstack-protector -fexceptions -Wreturn-type -Werror -pthread -o message_port.o
../../prog/3rdPartyLibs/mongo-cxx-driver/mongo/util/net/message_port_test.cpp
% gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/6.1.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --disable-multilib --disable-werror
--enable-checking=release
Thread model: posix
gcc version 6.1.1 20160501 (GCC)
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From: "magum1977 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70996] deadlock on compilation sequence of operator<<
Date: Sat, 07 May 2016 14:26:00 -0000
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--- Comment #1 from Alexander <magum1977 at gmail dot com> ---
Created attachment 38435
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38435&action=edit
actually only this src leads inifinite compilation. src before finished with
error after 5 minutes
actually only this src leads inifinite compilation.
src before finished with error after 5 minutes
error (which occured after 5 mins):
g++ -pipe -c -msse2 -m64 -MD -Wno-trigraphs -Wno-multichar -Wformat
-Wno-format-extra-args -ffunction-sections -fdata-sections
-fno-omit-frame-pointer -ffast-math -ffinite-math-only -minline-all-stringops
-std=c++98 -fconserve-space -Wno-invalid-offsetof -I /usr/include -g
-fstack-protector -fexceptions -Wreturn-type -Werror -pthread -o message_port.o
../../prog/3rdPartyLibs/mongo-cxx-driver/mongo/util/net/message_port_test.cpp
../../prog/3rdPartyLibs/mongo-cxx-driver/mongo/util/net/message_port_test.cpp:
In instantiation of 'Nullstream& Nullstream::operator<<(T*) [with T =
std::ios_base&(std::ios_base&)]':
../../prog/3rdPartyLibs/mongo-cxx-driver/mongo/util/net/message_port_test.cpp:46:50:
required from here
../../prog/3rdPartyLibs/mongo-cxx-driver/mongo/util/net/message_port_test.cpp:23:32:
error: invalid static_cast from type 'std::ios_base& (*)(std::ios_base&)' to
type 'void*'
return operator<<( static_cast<void*>( t ) );
>From gcc-bugs-return-524442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 14:31:55 2016
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Subject: [Bug c++/70996] deadlock on compilation sequence of operator<<
Date: Sat, 07 May 2016 14:31:00 -0000
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--- Comment #2 from Alexander <magum1977 at gmail dot com> ---
std-98 is not affect to result
>From gcc-bugs-return-524443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 14:41:12 2016
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From: "doko at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/70997] New: [7 Regression] bootstrap broken on s390x-linux-gnu
Date: Sat, 07 May 2016 14:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70997
Bug ID: 70997
Summary: [7 Regression] bootstrap broken on s390x-linux-gnu
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: doko at gcc dot gnu.org
Target Milestone: ---
seen with 20160506 on s390x-linux-gnu
/<<PKGBUILDDIR>>/build/./prev-gcc/xg++ -B/<<PKGBUILDDIR>>/build/./prev-gcc/
-B/usr/lib/gcc-snapshot/s390x-linux-gnu/bin/ -nostdinc++
-B/<<PKGBUILDDIR>>/build/prev-s390x-linux-gnu/libstdc++-v3/src/.libs
-B/<<PKGBUILDDIR>>/build/prev-s390x-linux-gnu/libstdc++-v3/libsupc++/.libs
-I/<<PKGBUILDDIR>>/build/prev-s390x-linux-gnu/libstdc++-v3/include/s390x-linux-gnu
-I/<<PKGBUILDDIR>>/build/prev-s390x-linux-gnu/libstdc++-v3/include
-I/<<PKGBUILDDIR>>/src/libstdc++-v3/libsupc++
-L/<<PKGBUILDDIR>>/build/prev-s390x-linux-gnu/libstdc++-v3/src/.libs
-L/<<PKGBUILDDIR>>/build/prev-s390x-linux-gnu/libstdc++-v3/libsupc++/.libs
-fno-PIE -c -g -O2 -gtoggle -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common
-DHAVE_CONFIG_H -I. -I. -I../../src/gcc -I../../src/gcc/.
-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 cfganal.o -MT cfganal.o
-MMD -MP -MF ./.deps/cfganal.TPo ../../src/gcc/cfganal.c
../../src/gcc/cfganal.c: In function 'edge_def* find_edge(basic_block,
basic_block)':
../../src/gcc/cfganal.c:500:1: internal compiler error: in redirect_jump, at
jump.c:1560
}
^
0x80cfcefd redirect_jump(rtx_jump_insn*, rtx_def*, int)
../../src/gcc/jump.c:1560
0x81877341 try_optimize_cfg
../../src/gcc/cfgcleanup.c:2899
0x81877df1 cleanup_cfg(int)
../../src/gcc/cfgcleanup.c:3150
0x818781bd execute
../../src/gcc/cfgcleanup.c:3279
Please submit a full bug report,
with preprocessed source if appropriate.
configured with
// Target: s390x-linux-gnu
// Configured with: ../src/configure -v --with-pkgversion='Ubuntu
20160506-1ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-snapshot/README.Bugs
--enable-languages=c,ada,c++,java,go,fortran,objc,obj-c++
--prefix=/usr/lib/gcc-snapshot --enable-shared --enable-linker-build-id
--disable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new
--enable-gnu-unique-object --disable-libsanitizer --disable-libquadmath
--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-7-snap-s390x/jre
--enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-7-snap-s390x
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-7-snap-s390x
--with-arch-directory=s390x --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch=zEC12
--with-long-double-128 --enable-multilib --enable-checking=yes
--build=s390x-linux-gnu --host=s390x-linux-gnu --target=s390x-linux-gnu
full build log
https://launchpadlibrarian.net/258248825/buildlog_ubuntu-yakkety-s390x.gcc-snapshot_20160506-1ubuntu1_BUILDING.txt.gz
>From gcc-bugs-return-524444-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 14:43:33 2016
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From: "magum1977 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70996] regression - infinite compilation of sequence overrided operator<<
Date: Sat, 07 May 2016 14:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70996
Alexander <magum1977 at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|infinite compilation of |regression - infinite
|sequence overrided |compilation of sequence
|operator<< |overrided operator<<
--- Comment #3 from Alexander <magum1977 at gmail dot com> ---
gcc 5.3 have no any problems with such code
>From gcc-bugs-return-524445-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 14:54:43 2016
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Received: (qmail 45002 invoked by uid 48); 7 May 2016 14:54:29 -0000
From: "physiker at toast2 dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/66328] Wrong initialization of derived-type DATA
Date: Sat, 07 May 2016 14:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66328
physiker at toast2 dot net changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |physiker at toast2 dot net
--- Comment #1 from physiker at toast2 dot net ---
It seems that the bug is fixed. When the code is compiled with gfortran 6.1,
the binary produces the expected output when run (see below).
bash-3.2$ LANG=C gfortran-fsf-6 -v ddata.f90
Driving: gfortran-fsf-6 -v ddata.f90 -mmacosx-version-min=10.9.4 -l gfortran
-shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran-fsf-6
COLLECT_LTO_WRAPPER=/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/6.1.0/lto-wrapper
Target: x86_64-apple-darwin13.4.0
Configured with: ../gcc-6.1.0/configure --prefix=/sw --prefix=/sw/lib/gcc6
--mandir=/sw/share/man --infodir=/sw/lib/gcc6/info
--enable-languages=c,c++,fortran,lto,objc,obj-c++,java --with-gmp=/sw
--with-libiconv-prefix=/sw --with-isl=/sw --with-mpc=/sw --with-system-zlib
--program-suffix=-fsf-6
Thread model: posix
gcc version 6.1.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-mmacosx-version-min=10.9.4' '-shared-libgcc'
'-mtune=core2'
/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/6.1.0/f951 ddata.f90 -fPIC
-quiet -dumpbase ddata.f90 -mmacosx-version-min=10.9.4 -mtune=core2 -auxbase
ddata -version -fintrinsic-modules-path
/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/finclude -o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//ccxnGIeX.s
GNU Fortran (GCC) version 6.1.0 (x86_64-apple-darwin13.4.0)
compiled by GNU C version 6.1.0, 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 Fortran2008 (GCC) version 6.1.0 (x86_64-apple-darwin13.4.0)
compiled by GNU C version 6.1.0, 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
COLLECT_GCC_OPTIONS='-v' '-mmacosx-version-min=10.9.4' '-shared-libgcc'
'-mtune=core2'
as -arch x86_64 -force_cpusubtype_ALL -o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//ccpWyVcF.o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//ccxnGIeX.s
Reading specs from
/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/../../../libgfortran.spec
rename spec lib to liborig
COLLECT_GCC_OPTIONS='-v' '-mmacosx-version-min=10.9.4' '-shared-libgcc'
'-mtune=core2'
COMPILER_PATH=/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/6.1.0/:/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/6.1.0/:/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/:/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/:/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/
LIBRARY_PATH=/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/:/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/../../../
COLLECT_GCC_OPTIONS='-v' '-mmacosx-version-min=10.9.4' '-shared-libgcc'
'-mtune=core2'
/sw/lib/gcc6/libexec/gcc/x86_64-apple-darwin13.4.0/6.1.0/collect2 -dynamic
-arch x86_64 -macosx_version_min 10.9.4 -weak_reference_mismatches non-weak -o
a.out -L/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0
-L/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/../../..
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//ccpWyVcF.o -lgfortran
-no_compact_unwind -lSystem -lgcc_ext.10.5 -lgcc -lquadmath -lm -lgcc_ext.10.5
-lgcc -lSystem -v
collect2 version 6.1.0
/usr/bin/ld -dynamic -arch x86_64 -macosx_version_min 10.9.4
-weak_reference_mismatches non-weak -o a.out
-L/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0
-L/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0/../../..
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//ccpWyVcF.o -lgfortran
-no_compact_unwind -lSystem -lgcc_ext.10.5 -lgcc -lquadmath -lm -lgcc_ext.10.5
-lgcc -lSystem -v
@(#)PROGRAM:ld PROJECT:ld64-241.9
configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h
armv6m armv7m armv7em
Library search paths:
/sw/lib/gcc6/lib/gcc/x86_64-apple-darwin13.4.0/6.1.0
/sw/lib/gcc6/lib
/usr/lib
/usr/local/lib
Framework search paths:
/Library/Frameworks/
/System/Library/Frameworks/
/usr/bin/nm -n /var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//ccpWyVcF.o
bash-3.2$ ./a.out
1.00000000 1.00000000
1.00000000 1.00000000
bash-3.2$
>From gcc-bugs-return-524446-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 14:55:11 2016
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70998] New: [7 Regression]: ICE in pre_and_rev_post_order_compute, at cfganal.c
Date: Sat, 07 May 2016 14:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70998
Bug ID: 70998
Summary: [7 Regression]: ICE in pre_and_rev_post_order_compute,
at cfganal.c
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
Target Milestone: ---
Recent commit caused following regression in the testsuite for x86_64-linux-gnu
target:
FAIL: g++.dg/pr62079.C (internal compiler error)
FAIL: g++.dg/pr62079.C (test for excess errors)
cc1plus -quiet -std=c++11 -O2 -fnon-call-exceptions pr62079.C
pr62079.C: In function ‘int main()’:
pr62079.C:78:1: internal compiler error: in pre_and_rev_post_order_compute, at
cfganal.c:1056
}
^
0x936c5d pre_and_rev_post_order_compute(int*, int*, bool)
/home/uros/gcc-svn/trunk/gcc/cfganal.c:1055
0x901f8f init_alias_analysis()
/home/uros/gcc-svn/trunk/gcc/alias.c:3252
0x13d0d5e sched_init()
/home/uros/gcc-svn/trunk/gcc/haifa-sched.c:7369
0x13d23cd haifa_sched_init()
/home/uros/gcc-svn/trunk/gcc/haifa-sched.c:7406
0xcf8d79 schedule_insns()
/home/uros/gcc-svn/trunk/gcc/sched-rgn.c:3504
0xcf959d schedule_insns()
/home/uros/gcc-svn/trunk/gcc/sched-rgn.c:3498
0xcf959d rest_of_handle_sched2
/home/uros/gcc-svn/trunk/gcc/sched-rgn.c:3737
0xcf959d execute
/home/uros/gcc-svn/trunk/gcc/sched-rgn.c:3873
Please submit a full bug report,
...
(gdb) bt
#0 internal_error (gmsgid=gmsgid@entry=0x1beef58 "in %s, at %s:%d") at
/home/uros/gcc-svn/trunk/gcc/diagnostic.c:1251
#1 0x000000000149f494 in fancy_abort (file=file@entry=0x1602c78
"/home/uros/gcc-svn/trunk/gcc/cfganal.c", line=line@entry=1056,
function=function@entry=0x1602df0 <pre_and_rev_post_order_compute(int*,
int*, bool)::__FUNCTION__> "pre_and_rev_post_order_compute") at
/home/uros/gcc-svn/trunk/gcc/diagnostic.c:1327
#2 0x0000000000936c5e in pre_and_rev_post_order_compute
(pre_order=pre_order@entry=0x0,
rev_post_order=rev_post_order@entry=0x21ed630,
include_entry_exit=include_entry_exit@entry=false)
at /home/uros/gcc-svn/trunk/gcc/cfganal.c:1055
#3 0x0000000000901f90 in init_alias_analysis () at
/home/uros/gcc-svn/trunk/gcc/alias.c:3252
#4 0x00000000013d0d5f in sched_init () at
/home/uros/gcc-svn/trunk/gcc/haifa-sched.c:7369
#5 0x00000000013d23ce in haifa_sched_init () at
/home/uros/gcc-svn/trunk/gcc/haifa-sched.c:7406
#6 0x0000000000cf8d7a in schedule_insns () at
/home/uros/gcc-svn/trunk/gcc/sched-rgn.c:3504
#7 0x0000000000cf959e in schedule_insns () at
/home/uros/gcc-svn/trunk/gcc/sched-rgn.c:3498
#8 rest_of_handle_sched2 () at /home/uros/gcc-svn/trunk/gcc/sched-rgn.c:3737
#9 (anonymous namespace)::pass_sched2::execute (this=<optimized out>) at
/home/uros/gcc-svn/trunk/gcc/sched-rgn.c:3873
#10 0x0000000000c85a04 in execute_one_pass (pass=pass@entry=0x21bb200) at
/home/uros/gcc-svn/trunk/gcc/passes.c:2344
#11 0x0000000000c85fd8 in execute_pass_list_1 (pass=0x21bb200) at
/home/uros/gcc-svn/trunk/gcc/passes.c:2428
#12 0x0000000000c85fea in execute_pass_list_1 (pass=0x21ba9c0) at
/home/uros/gcc-svn/trunk/gcc/passes.c:2429
#13 0x0000000000c85fea in execute_pass_list_1 (pass=0x21b98e0) at
/home/uros/gcc-svn/trunk/gcc/passes.c:2429
#14 0x0000000000c86035 in execute_pass_list (fn=<optimized out>,
pass=<optimized out>)
at /home/uros/gcc-svn/trunk/gcc/passes.c:2439
#15 0x000000000097c9c4 in cgraph_node::expand (this=this@entry=0x7fffeffb7730)
at /home/uros/gcc-svn/trunk/gcc/cgraphunit.c:1982
#16 0x000000000097e268 in expand_all_functions () at
/home/uros/gcc-svn/trunk/gcc/cgraphunit.c:2118
#17 symbol_table::compile (this=this@entry=0x7fffefe0c0a8) at
/home/uros/gcc-svn/trunk/gcc/cgraphunit.c:2474
#18 0x0000000000980623 in symbol_table::compile (this=0x7fffefe0c0a8) at
/home/uros/gcc-svn/trunk/gcc/cgraphunit.c:2538
#19 symbol_table::finalize_compilation_unit (this=0x7fffefe0c0a8) at
/home/uros/gcc-svn/trunk/gcc/cgraphunit.c:2564
#20 0x0000000000d4c458 in compile_file () at
/home/uros/gcc-svn/trunk/gcc/toplev.c:488
#21 0x000000000062d9a4 in do_compile () at
/home/uros/gcc-svn/trunk/gcc/toplev.c:1987
#22 toplev::main (this=this@entry=0x7fffffffdb90, argc=<optimized out>,
argc@entry=6, argv=<optimized out>,
argv@entry=0x7fffffffdc98) at /home/uros/gcc-svn/trunk/gcc/toplev.c:2095
#23 0x000000000062fb87 in main (argc=6, argv=0x7fffffffdc98) at
/home/uros/gcc-svn/trunk/gcc/main.c:39
(gdb) f 2
#2 0x0000000000936c5e in pre_and_rev_post_order_compute
(pre_order=pre_order@entry=0x0,
rev_post_order=rev_post_order@entry=0x21ed630,
include_entry_exit=include_entry_exit@entry=false)
at /home/uros/gcc-svn/trunk/gcc/cfganal.c:1055
1055 gcc_assert (pre_order_num
(gdb) list
1050 /* The number of nodes visited should be the number of blocks. */
1051 gcc_assert (pre_order_num == n_basic_blocks_for_fn (cfun));
1052 else
1053 /* The number of nodes visited should be the number of blocks minus
1054 the entry and exit blocks which are not visited here. */
1055 gcc_assert (pre_order_num
1056 == (n_basic_blocks_for_fn (cfun) - NUM_FIXED_BLOCKS));
1057
1058 return pre_order_num;
1059 }
(gdb)
>From gcc-bugs-return-524447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 14:57:03 2016
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Subject: [Bug rtl-optimization/70998] [7 Regression]: ICE in pre_and_rev_post_order_compute, at cfganal.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70998
Uroš Bizjak <ubizjak at gmail dot com> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-524448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 15:08:12 2016
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Subject: [Bug target/70999] New: String incorrectly placed in flash instead of RAM when building with -ffunction-sections
Date: Sat, 07 May 2016 15:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70999
Bug ID: 70999
Summary: String incorrectly placed in flash instead of RAM when
building with -ffunction-sections
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: target
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Created attachment 38436
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38436&action=edit
Test source code
When building with AVR-GCC 6.1.0, -ffunction-sections and any optimization
level other than -O0 then strings that are passed as a parameter to a function
like puts("whatever") will be stored in flash instead of RAM.
However, this will correctly store myString in RAM with -ffunction-sections:
static const char myString[] = "whatever";
puts(myString);
avr-gcc -mmcu=atmega328 -Wall -Wextra -O1 -ffunction-sections main.c
>From gcc-bugs-return-524449-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 15:43:48 2016
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Subject: [Bug rtl-optimization/70998] [7 Regression]: ICE in pre_and_rev_post_order_compute, at cfganal.c
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
It was triggered by r235906.
>From gcc-bugs-return-524450-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 17:10:44 2016
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Subject: [Bug rtl-optimization/70998] [7 Regression]: ICE in pre_and_rev_post_order_compute, at cfganal.c
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--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
sse2_cvtsd2ss<round_name> pattern is wrong.
This pattern is written as:
(define_insn "sse2_cvtsd2ss<round_name>"
[(set (match_operand:V4SF 0 "register_operand" "=x,x,v")
(vec_merge:V4SF
(vec_duplicate:V4SF
(float_truncate:V2SF
(match_operand:V2DF 2 "nonimmediate_operand"
"x,m,<round_constraint>")))
(match_operand:V4SF 1 "register_operand" "0,0,v")
(const_int 1)))]
This implies V2DF load from memory, which is not the case.
The pattern should be similar to e.g. cvtsi2ss pattern:
(define_insn "sse_cvtsi2ss<round_name>"
[(set (match_operand:V4SF 0 "register_operand" "=x,x,v")
(vec_merge:V4SF
(vec_duplicate:V4SF
(float:SF (match_operand:SI 2 "<round_nimm_scalar_predicate>"
"r,m,<round_constraint3>")))
(match_operand:V4SF 1 "register_operand" "0,0,v")
(const_int 1)))]
This is correct scalar memory load.
>From gcc-bugs-return-524451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 17:12:08 2016
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Subject: [Bug target/70998] [7 Regression]: ICE in pre_and_rev_post_order_compute, at cfganal.c
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Uroš Bizjak <ubizjak at gmail dot com> changed:
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--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
Target issue.
BTW: several SSE scalar conversion patterns are wrong.
>From gcc-bugs-return-524452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 17:25:38 2016
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Subject: [Bug fortran/66328] Wrong initialization of derived-type DATA
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This PR has been "fixed" between revisions r230421 (2015-11-16, wrong-code) and
r230500+patch for pr59910 (2015-11-17), likely by r230580 (pr59910).
Steve, could you please check that this is right?
>From gcc-bugs-return-524453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 17:37:21 2016
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From: "soltan.gris at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/71000] New: Wrong defines for ATMEGA328p
Date: Sat, 07 May 2016 17:37:00 -0000
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Bug ID: 71000
Summary: Wrong defines for ATMEGA328p
Product: gcc
Version: unknown
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Target: AVR
In the iom328p.h are the defines for the Portpins PORTyx while in the other .h
files is it Pyx. Where y is the Port and x the pin number.
iom328p.h :
#define PORTB _SFR_IO8(0x05)
#define PORTB0 0
#define PORTB1 1
#define PORTB2 2
#define PORTB3 3
#define PORTB4 4
#define PORTB5 5
#define PORTB6 6
#define PORTB7 7
iotn2313.h
/* Data Register, Port B PORTB[7:0] */
#define PORTB _SFR_IO8(0x18)
#define PB7 7
#define PB6 6
#define PB5 5
#define PB4 4
#define PB3 3
#define PB2 2
#define PB1 1
#define PB0 0
iomxx4.h
#define PORTB _SFR_IO8(0x05)
#define PB7 7
#define PB6 6
#define PB5 5
#define PB4 4
#define PB3 3
#define PB2 2
#define PB1 1
#define PB0 0
Kind regards
>From gcc-bugs-return-524454-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat May 07 18:12:00 2016
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Subject: [Bug tree-optimization/70985] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: verify_gimple failed
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70985
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-07
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |7.0
Summary|ICE on valid code at -O3 on |[7 Regression] ICE on valid
|x86_64-linux-gnu: |code at -O3 on
|verify_gimple failed |x86_64-linux-gnu:
| |verify_gimple failed
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r235871.
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Subject: [Bug tree-optimization/70985] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: verify_gimple failed
Date: Sat, 07 May 2016 18:57:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
BIT_FIELD_REF allows non-is_gimple_val first operand, but when it is
transformed into a cast, obviously it needs to be forced into gimple val first.
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From: "appfault at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70991] Uninitialized class allowed if it came from self-assignment, or a member function
Date: Sat, 07 May 2016 18:58:00 -0000
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--- Comment #2 from bennet brauer <appfault at hotmail dot com> ---
By the way, this bug mentions classes specifically, because the same idea but
with a simple "int" assignment generates a warning:
error: ‘foo’ is used uninitialized in this function [-Werror=uninitialized]
int foo = foo; // Unintialized direct assignment.
^
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Subject: [Bug other/71001] New: cross build native: fixincludes searches host path on build system
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Bug ID: 71001
Summary: cross build native: fixincludes searches host path on
build system
Product: gcc
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Created attachment 38437
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38437&action=edit
example to reproduce the problem
Hello,
I have encountered an issue when cross-compiling a native gcc for
i686-w64-mingw32 on a GNU/Linux system. The build tries to access a host path
on the build system, which makes no sense when cross-compiling.
In this case it is "/mingw/include", which is supposed to exist on
i686-w64-mingw32 but of course not on the GNU/Linux that's used as build
system,
thus the build fails (perhaps luckily even -- if it was a more common path like
/usr/include, I imagine the problem would go unnoticed).
$ uname -m -o
x86_64 GNU/Linux
$ ../gcc-6.1.0/configure \
--build=x86_64-pc-linux-gnu \
--host=i686-w64-mingw32 \
--target=i686-w64-mingw32 \
--prefix=/usr \
--enable-languages=c \
--with-gmp="$sysroot"/usr \
--with-mpfr="$sysroot"/usr \
--with-mpc="$sysroot"/usr
...
$ make
...
The directory that should contain system headers does not exist:
/mingw/include
Makefile:2907: recipe for target 'stmp-fixinc' failed
...
It appears that using --with-sysroot to specify a i686-w64-mingw32 sysroot
fixes it, but it also encodes the sysroot path into the newly built compiler
for use at runtime, which I don't want since it is a build-system-specific
path. And this isn't building a cross-compiler anyways (which is where
--with-sysroot makes sense).
So I looked at --with-build-sysroot instead. If I understood correctly,
--with-build-sysroot is meant for specifying the target sysroot for use during
the gcc build process only, and not later at runtime. But the fixincludes step
does not respect --with-build-sysroot.
Maybe fixincludes should use --with-build-sysroot if that's set, and be
disabled
otherwise (when cross-compiling and no sysroot is given).
I found an old posting about this issue here, though it wasn't answered:
https://gcc.gnu.org/ml/gcc-help/2006-04/msg00191.html
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Subject: [Bug middle-end/71002] New: [6 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Sat, 07 May 2016 19:54:00 -0000
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Bug ID: 71002
Summary: [6 Regression] -fstrict-aliasing breaks Boost's short
string optimization implementation
Product: gcc
Version: 6.1.1
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Created attachment 38438
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Reduced test case
(This is the miscompilation I reported seeing in PR70054. I have a reduced
test case for it now.)
Since GCC 6, the following simple use of boost::container::string is broken:
$ cat foo.cpp
#include <boost/container/string.hpp>
#include <cstdlib>
#include <utility>
using boost::container::string;
struct foo
{
__attribute__((noinline))
foo(string str)
: m_str{std::move(str)},
m_len{m_str.length()}
{ }
string m_str;
std::size_t m_len;
};
int main() {
foo f{"the quick brown fox jumps over the lazy dog"};
if (f.m_len == 0) {
std::abort();
}
return 0;
}
$ g++ -O2 -Wall foo.cpp -o foo && ./foo
[1] 12277 abort (core dumped) ./foo
It works with -fno-strict-aliasing. I reduced the problem to the attached
standalone test case. Boost's code doesn't seem to be 100% compliant, but the
worst thing it does is access a non-active union member (the is_short
bitfield). As far as I know, GCC permits that as an extension.
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Subject: [Bug c++/33041] g++ incorrectly resolves an identically named templated struct in a super class
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |rejects-valid
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-07
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.5.3, 4.8.3, 4.9.3, 5.3.0,
| |6.1.0
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirming for the compilation error mentioned in comment #4. The latest trunk
(7.0) fails to compile the test case with the errors below. (Both Clang and
the EDG front end accept the code.)
$ cat x.cpp && gcc -Wall -Wextra -Wpedantic x.cpp
struct bar {
typedef bar type;
template <typename A>
struct foo { static const int value = 2; };
};
template <typename B>
struct foo: bar { static const int value = 1; };
int main() {
// foo<int> is the foo struct at namespace level, foo<double>
// should be the foo struct within bar, but it is not in g++
__builtin_printf ("%i\n", foo<int>::foo<double>::value);
// foo<int> is again the foo struct at namespace level,
// ::type explicitly takes its superclass so foo<double> is
// the foo struct within bar.
__builtin_printf ("%i\n", foo<int>::type::foo<double>::value);
}
x.cpp: In function ‘int main()’:
x.cpp:14:43: error: expected primary-expression before ‘double’
__builtin_printf ("%i\n", foo<int>::foo<double>::value);
^~~~~~
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/56226] Add support for DEC UNION and MAP extensions
Date: Sat, 07 May 2016 23:17:00 -0000
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--- Comment #20 from kargl at gcc dot gnu.org ---
Author: kargl
Date: Sat May 7 23:16:23 2016
New Revision: 235999
URL: https://gcc.gnu.org/viewcvs?rev=235999&root=gcc&view=rev
Log:
2016-05-07 Fritz Reese <fritzoreese@gmail.com>
PR fortran/56226
* module.c (dt_upper_string): Rename to gfc_dt_upper_string
(dt_lower_string): Likewise.
* gfortran.h: Make new gfc_dt_upper/lower_string global.
* class.c: Use gfc_dt_upper_string.
* decl.c: Likewise.
* symbol.c: Likewise.
* resolve.c (resolve_component): New function.
(resolve_fl_derived0): Move component loop code to resolve_component.
* parse.c (check_component): New function.
(parse_derived): Move loop code to check_component.
* lang.opt, invoke.texi, options.c : New option -fdec-structure.
* libgfortran.h (bt): New basic type BT_UNION.
* gfortran.h (gfc_option): New option -fdec-structure.
(gfc_get_union_type, gfc_compare_union_types): New prototypes.
(gfc_bt_struct, gfc_fl_struct, case_bt_struct, case_fl_struct): New
macros.
(gfc_find_component): Change prototype.
* match.h (gfc_match_member_sep, gfc_match_map, gfc_match_union,
gfc_match_structure_decl): New prototypes.
* parse.h (gfc_comp_struct): New macro.
* symbol.c (gfc_find_component): Search for components in nested unions
* class.c (insert_component_ref, gfc_add_component_ref, add_proc_comp,
copy_vtab_proc_comps): Update calls to gfc_find_component.
* primary.c (gfc_convert_to_structure_constructor): Likewise.
* symbol.c (gfc_add_component): Likewise.
* resolve.c (resolve_typebound_function, resolve_typebound_subroutine,
resolve_typebound_procedure, resolve_component, resolve_fl_derived):
Likewise.
* expr.c (get_union_init, component_init): New functions.
* decl.c (match_clist_expr, match_record_decl, get_struct_decl,
gfc_match_map, gfc_match_union, gfc_match_structure_decl): Likewise.
* interface.c (compare_components, gfc_compare_union_types): Likewise.
* match.c (gfc_match_member_sep): Likewise.
* parse.c (check_component, parse_union, parse_struct_map): Likewise.
* resolve.c (resolve_fl_struct): Likewise.
* symbol.c (find_union_component): Likewise.
* trans-types.c (gfc_get_union_type): Likewise.
* parse.c (parse_derived): Use new functions.
* interface.c (gfc_compare_derived_types, gfc_compare_types): Likewise.
* expr.c (gfc_default_initializer): Likewise.
* gfortran.texi: Support for DEC structures, unions, and maps.
* gfortran.h (gfc_statement, sym_flavor): Likewise.
* check.c (gfc_check_kill_sub): Likewise.
* expr.c (gfc_copy_expr, simplify_const_ref,
gfc_has_default_initializer): Likewise.
* decl.c (build_sym, match_data_constant, add_init_expr_to_sym,
match_pointer_init, build_struct, variable_decl,
gfc_match_decl_type_spec, gfc_mach_data-decl, gfc_match_entry,
gfc_match_end, gfc_match_derived_decl): Likewise.
* interface.c (check_interface0, check_interface1,
gfc_search_interface): Likewise.
* misc.c (gfc_basic_typename, gfc_typename): Likewise.
* module.c (add_true_name, build_tnt, bt_types, mio_typespec,
fix_mio_expr, load_needed, mio_symbol, read_module, write_symbol,
gfc_get_module_backend_decl): Likewise.
* parse.h (gfc_compile_state): Likewise.
* parse.c (decode_specification_statement, decode_statement,
gfc_ascii_statement, verify_st_order, parse_spec): Likewise.
* primary.c (gfc_match_varspec, gfc_match_structure_constructor,
gfc_match_rvalue, match_variable): Likewise.
* resolve.c (find_arglists, resolve_structure_cons,
is_illegal_recursion, resolve_generic_f, get_declared_from_expr,
resolve_typebound_subroutine, resolve_allocate_expr,
nonscalar_typebound_assign, generate_component_assignments,
resolve_fl_variable_derived, check_defined_assignments,
resolve_component, resolve_symbol, resolve_equivalence_derived):
Likewise.
* symbol.c (flavors, check_conflict, gfc_add_flavor, gfc_use_derived,
gfc_restore_last_undo_checkpoint, gfc_type_compatible,
gfc_find_dt_in_generic): Likewise.
* trans-decl.c (gfc_get_module_backend_decl, create_function_arglist,
gfc_create_module_variable, check_constant_initializer): Likewise.
* trans-expr.c (gfc_conv_component_ref, gfc_conv_initializer,
gfc_trans_alloc_subarray_assign, gfc_trans_subcomponent_assign,
gfc_conv_structure, gfc_trans_scalar_assign, copyable_array_p):
Likewise.
* trans-io.c (transfer_namelist_element, transfer_expr,
gfc_trans_transfer): Likewise.
* trans-stmt.c (gfc_trans_deallocate): Likewise.
* trans-types.c (gfc_typenode_for_spec, gfc_copy_dt_decls_ifequal,
gfc_get_derived_type): Likewise.
2016-05-07 Fritz Reese <fritzoreese@gmail.com>
PR fortran/56226
* gfortran.dg/dec_structure_1.f90: New testcase.
* gfortran.dg/dec_structure_2.f90: Ditto.
* gfortran.dg/dec_structure_3.f90: Ditto.
* gfortran.dg/dec_structure_4.f90: Ditto.
* gfortran.dg/dec_structure_5.f90: Ditto.
* gfortran.dg/dec_structure_6.f90: Ditto.
* gfortran.dg/dec_structure_7.f90: Ditto.
* gfortran.dg/dec_structure_8.f90: Ditto.
* gfortran.dg/dec_structure_9.f90: Ditto.
* gfortran.dg/dec_structure_10.f90: Ditto.
* gfortran.dg/dec_structure_11.f90: Ditto.
* gfortran.dg/dec_union_1.f90: Ditto.
* gfortran.dg/dec_union_2.f90: Ditto.
* gfortran.dg/dec_union_3.f90: Ditto.
* gfortran.dg/dec_union_4.f90: Ditto.
* gfortran.dg/dec_union_5.f90: Ditto.
* gfortran.dg/dec_union_6.f90: Ditto.
* gfortran.dg/dec_union_7.f90: Ditto.
Added:
trunk/gcc/testsuite/gfortran.dg/dec_structure_1.f90
trunk/gcc/testsuite/gfortran.dg/dec_structure_10.f90
trunk/gcc/testsuite/gfortran.dg/dec_structure_11.f90
trunk/gcc/testsuite/gfortran.dg/dec_structure_2.f90
trunk/gcc/testsuite/gfortran.dg/dec_structure_3.f90
trunk/gcc/testsuite/gfortran.dg/dec_structure_4.f90
trunk/gcc/testsuite/gfortran.dg/dec_structure_5.f90
trunk/gcc/testsuite/gfortran.dg/dec_structure_6.f90
trunk/gcc/testsuite/gfortran.dg/dec_structure_7.f90
trunk/gcc/testsuite/gfortran.dg/dec_structure_8.f90
trunk/gcc/testsuite/gfortran.dg/dec_structure_9.f90
trunk/gcc/testsuite/gfortran.dg/dec_union_1.f90
trunk/gcc/testsuite/gfortran.dg/dec_union_2.f90
trunk/gcc/testsuite/gfortran.dg/dec_union_3.f90
trunk/gcc/testsuite/gfortran.dg/dec_union_4.f90
trunk/gcc/testsuite/gfortran.dg/dec_union_5.f90
trunk/gcc/testsuite/gfortran.dg/dec_union_6.f90
trunk/gcc/testsuite/gfortran.dg/dec_union_7.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/check.c
trunk/gcc/fortran/class.c
trunk/gcc/fortran/decl.c
trunk/gcc/fortran/dump-parse-tree.c
trunk/gcc/fortran/expr.c
trunk/gcc/fortran/gfortran.h
trunk/gcc/fortran/gfortran.texi
trunk/gcc/fortran/interface.c
trunk/gcc/fortran/invoke.texi
trunk/gcc/fortran/lang.opt
trunk/gcc/fortran/libgfortran.h
trunk/gcc/fortran/match.c
trunk/gcc/fortran/match.h
trunk/gcc/fortran/misc.c
trunk/gcc/fortran/module.c
trunk/gcc/fortran/options.c
trunk/gcc/fortran/parse.c
trunk/gcc/fortran/parse.h
trunk/gcc/fortran/primary.c
trunk/gcc/fortran/resolve.c
trunk/gcc/fortran/symbol.c
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/fortran/trans-types.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/56226] Add support for DEC UNION and MAP extensions
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--- Comment #23 from kargl at gcc dot gnu.org ---
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diff for revision 235999
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Subject: [Bug fortran/56226] Add support for DEC UNION and MAP extensions
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |kargl at gcc dot gnu.org
--- Comment #24 from kargl at gcc dot gnu.org ---
I have attached the diffs for fortran/ChangeLog, testsuite/ChangeLog,
and code changes for revision 235999. This is now in trunk. I'll
commit to the 6-branch next weekend.
Please keep an eye open for bug reports.
>From gcc-bugs-return-524467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 00:03:03 2016
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Subject: [Bug c++/34747] __attribute__((aligned(x)))+__alignof != correct behaviour
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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
Blocks| |58601
Resolution|--- |DUPLICATE
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
When compiled with the current trunk (7.0), the test produces the output below
(same as in comment #4). After reviewing the tests I believe all the failures
are false positives. The failing tests assume that a #pragma pack directive
doesn't affect the alignment of struct members. However, according to GCC
documentation for attribute packed: "Specifying this attribute [packed] for
struct and union types is equivalent to specifying the packed attribute on each
of the structure or union members." And specifying the attribute on a member
reduces its alignment to the one specified. So test5, for instance, expects
the alignment of a struct defined just following #pragma pack not to be
affected by the #pragma. Similarly for all the other failing tests. Since the
valid tests pass (fixed by PR 10179) I'll go ahead and close this report as a
duplicate of that bug. (Based on the summary of this I'm assuming the
expectation is that #pragma pack have the same effect as attribute packed and
not something else.)
FAILED: test5
FAILED: test7
FAILED: test20
FAILED: test21
FAILED: test25
FAILED: test26
FAILED: test37
FAILED: test46
FAILED: test47
FAILED: test48
10 tests failed!
*** This bug has been marked as a duplicate of bug 10179 ***
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58601
[Bug 58601] [meta-bug] alignas
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Subject: [Bug c++/10179] alignment attributes are not inherited correctly with empty classes
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What |Removed |Added
----------------------------------------------------------------------------
CC| |andry at inbox dot ru
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
*** Bug 34747 has been marked as a duplicate of this bug. ***
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Subject: [Bug c++/58601] [meta-bug] alignas
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Bug 58601 depends on bug 34747, which changed state.
Bug 34747 Summary: __attribute__((aligned(x)))+__alignof != correct behaviour
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=34747
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |DUPLICATE
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From: "egall at gwmail dot gwu.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/71003] New: __extension__ silences pedwarn for "\e" in C but not in C++
Date: Sun, 08 May 2016 01:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71003
Bug ID: 71003
Summary: __extension__ silences pedwarn for "\e" in C but not
in C++
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: egall at gwmail dot gwu.edu
Target Milestone: ---
Host: i386-apple-darwin9.8.0
Target: i386-apple-darwin9.8.0
Build: i386-apple-darwin9.8.0
Say I have the following file:
$ cat __extension__.c
const char *str0 = "\e";
const char *str1 = __extension__ "\e";
When I try to compile it with gcc, everything works as expected:
$ /usr/local/bin/gcc -pedantic -c __extension__.c
__extension__.c:1:20: warning: non-ISO-standard escape sequence, '\e'
const char *str0 = "\e";
^~~~
i.e., it only warns on the string where I left off the __extension__.
However, when I try to compile it with g++, it warns on both strings:
$ /usr/local/bin/g++ -pedantic -c __extension__.c
__extension__.c:1:20: warning: non-ISO-standard escape sequence, '\e'
const char *str0 = "\e";
^~~~
__extension__.c:2:34: warning: non-ISO-standard escape sequence, '\e'
const char *str1 = __extension__ "\e";
^~~~
This behavior is inconsistent. I would expect the warning for the string with
__extension__ to be silenced in both cases, not just in C.
g++ version info:
$ /usr/local/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/usr/local/bin/g++
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/i386-apple-darwin9.8.0/7.0.0/lto-wrapper
Target: i386-apple-darwin9.8.0
Configured with: ../configure --disable-werror
--enable-languages=c,c++,lto,objc,obj-c++ --enable-stage1-checking=release -C
--with-system-libunwind --enable-secureplt --enable-frame-pointer
--enable-version-specific-runtime-libs --enable-assert --enable-fat
--enable-portable-binary --enable-browser-plugin --enable-gconf-peer
--enable-libgcj-debug --enable-gc-debug --enable-interpreter
--enable-aot-compile-rpm --enable-java-home --with-x --enable-collections
--enable-gstreamer-peer --enable-xmlj --enable-qt-peer --enable-debug
--enable-local-sockets --without-isl --enable-objc-gc --enable-maintainer-mode
--enable-host-shared CC=/usr/local/bin/gcc CXX=/usr/local/bin/g++
AUTOCONF=/usr/local/bin/autoconf AUTOHEADER=/usr/local/bin/autoheader
AUTOM4TE=/usr/local/bin/autom4te AUTORECONF=/usr/local/bin/autoreconf
AUTOSCAN=/usr/local/bin/autoscan AUTOUPDATE=/usr/local/bin/autoupdate
IFNAMES=/usr/local/bin/ifnames
Thread model: posix
gcc version 7.0.0 20160426 (experimental) (GCC)
>From gcc-bugs-return-524469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 02:21:47 2016
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From: "eric at efcs dot ca" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/71004] New: recursive_directory_iterator does not have a user-provided default ctor
Date: Sun, 08 May 2016 02:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71004
Bug ID: 71004
Summary: recursive_directory_iterator does not have a
user-provided default ctor
Product: gcc
Version: 6.0
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Hi Jonathan,
The default ctor provided for recursive_directory_iterator won't allow it to it
to be constructed as const.
// reproducer.cpp
#include <experimental/filesystem>
int main() {
using namespace std::experimental::filesystem;
const recursive_directory_iterator endIt2;
}
>From gcc-bugs-return-524470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 02:27:53 2016
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Subject: [Bug libstdc++/71004] recursive_directory_iterator does not have a user-provided default ctor
Date: Sun, 08 May 2016 02:27:00 -0000
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--- Comment #1 from Eric Fiselier <eric at efcs dot ca> ---
Additionally this seems to be affecting the value returned from
"recursion_pending()". The following code compiles and runs without asserting
on my machine.
#include <experimental/filesystem>
#include <cassert>
using namespace std::experimental::filesystem;
int main() {
recursive_directory_iterator it;
assert(it.recursion_pending() == false);
assert(it.recursion_pending() == true);
}
>From gcc-bugs-return-524471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 02:37:46 2016
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Subject: [Bug libstdc++/71005] New: recursive_directory_iterator::operator++(int) incorrectly implemented
Date: Sun, 08 May 2016 02:37:00 -0000
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Bug ID: 71005
Summary: recursive_directory_iterator::operator++(int)
incorrectly implemented
Product: gcc
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Hi Jonathan,
The postfix increment operator returns the incremented value of the iterator,
not the previous one.
For example:
directory_iterator it(".");
path elem = *it;
path elem2 = *it++;
assert(elem == elem2); // fires
>From gcc-bugs-return-524472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 03:25:22 2016
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Subject: [Bug target/70963] vec_cts/vec_ctf intrinsics produce wrong results for 64-bit floating point
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David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-08
CC| |dje at gcc dot gnu.org,
| |meissner at gcc dot gnu.org,
| |segher at gcc dot gnu.org,
| |wschmidt at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-524473-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 07:16:28 2016
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Subject: [Bug c++/70977] [6/7 Regression] Out of memory during compilation of facebook/wangle (flag c++0x works, flag c++14 fails).
Date: Sun, 08 May 2016 07:16:00 -0000
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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> ---
Started with r231863.
>From gcc-bugs-return-524474-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 09:09:27 2016
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Subject: [Bug middle-end/67485] expmed.c sanitizer detects overflow
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed also on trunk.
>From gcc-bugs-return-524475-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 09:12:55 2016
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Subject: [Bug debug/67482] dwarf2out.c sanitizer detects undefined behaviour negation of -9223372036854775808
Date: Sun, 08 May 2016 09:12:00 -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> ---
I cannot reproduce the runtime error with my instrumented trunk (7.0).
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Subject: [Bug rtl-optimization/67483] combine.c sanitizer detects undefined negative left shift
Date: Sun, 08 May 2016 09:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67483
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed with trunk.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/67486] ira-color.c sanitizer detects signed integer overflow
Date: Sun, 08 May 2016 09:17:00 -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 on trunk (7.0). I also see
../../work/gcc/sreal.c:231:20: runtime error: left shift of negative value
-2013265920
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/66940] ifcvt.c:1907 signed integer overflow
Date: Sun, 08 May 2016 09:27:00 -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 on trunk (7.0) also.
>From gcc-bugs-return-524479-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 10:09:27 2016
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From: "schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/56226] Add support for DEC UNION and MAP extensions
Date: Sun, 08 May 2016 10:09:00 -0000
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--- Comment #25 from Andreas Schwab <schwab@linux-m68k.org> ---
FAIL: gfortran.dg/dec_union_4.f90 -O0 execution test
FAIL: gfortran.dg/dec_union_4.f90 -O1 execution test
FAIL: gfortran.dg/dec_union_4.f90 -O2 execution test
FAIL: gfortran.dg/dec_union_4.f90 -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions execution test
FAIL: gfortran.dg/dec_union_4.f90 -O3 -g execution test
FAIL: gfortran.dg/dec_union_4.f90 -Os execution test
>From gcc-bugs-return-524480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 10:41:05 2016
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/71006] New: [7 Regression] ICE: verify_gimple failed (error: type mismatch in conditional expression) w/ -O1 -ftree-loop-vectorize
Date: Sun, 08 May 2016 10:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71006
Bug ID: 71006
Summary: [7 Regression] ICE: verify_gimple failed (error: type
mismatch in conditional expression) w/ -O1
-ftree-loop-vectorize
Product: gcc
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gcc-7.0.0-alpha20160501 snapshot ICEs when compiling the following reduced
testcase w/ -O1 -ftree-loop-vectorize:
% gcc-7.0.0-alpha20160501 -c -O1 -ftree-loop-vectorize gmqj07kc.c
gmqj07kc.c: In function 'fs':
gmqj07kc.c:4:1: error: type mismatch in conditional expression
fs (void)
^~
vector(16) char
vector(16) unsigned char
vector(16) unsigned char
vect__16.14_73 = VEC_COND_EXPR <vect_vec_iv_.13_67 != vect_cst__69,
vect_cst__70, vect_cst__72>;
gmqj07kc.c:4:1: internal compiler error: verify_gimple failed
unsigned char uu, gu, e2;
void
fs (void)
{
char *nq = (char *)&gu, *k4 = (char *)&gu;
while (*k4 < 1)
{
uu += (*nq != 0 || e2 != 0);
++*k4;
}
}
>From gcc-bugs-return-524481-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 11:04:32 2016
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Subject: [Bug fortran/68717] [6/7 Regression] New (bogus?) warnings when compiling some gfortran.dg tests with -flto after r231239
Date: Sun, 08 May 2016 11:04:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> As discussed in the other related PR, those are real issues - Fortran
> fronetnd should not declare one function with multiple and incompatible
> declarations.
The other related PR is pr68649.
The note: "code may be misoptimized unless -fno-strict-aliasing is used" looks
odd as the warnings are still there if one uses -fno-strict-aliasing as it was
the case before r231239.
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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'
Date: Sun, 08 May 2016 11:31:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
Status|WAITING |NEW
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed on trunk (7.0).
>From gcc-bugs-return-524483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 11:41:59 2016
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From: "schaub.johannes at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/71007] New: Divergence between treatment of char[0] between OR (=> SFINAE failure) and diagnostic printing (no failure)
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Bug ID: 71007
Summary: Divergence between treatment of char[0] between OR (=>
SFINAE failure) and diagnostic printing (no failure)
Product: gcc
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The following is supposed to tell the user that char[0] is an invalid type,
during diagnostic printing. But instead, it infinitely recurses up to SIZE_MAX
or something during printing the diagnostic message, eventually crashing
#include <utility>
#include <tuple>
template<typename T, T ...I>
auto ignore_n(std::integer_sequence<T, I...>) {
return std::make_tuple((I, std::ignore)...);
}
template<typename... Ts>
auto function(Ts... ts)
-> decltype((std::tuple_cat(
ignore_n(std::make_index_sequence<sizeof(char[int(sizeof...(Ts))-1])-1> ()),
std::tuple<double, bool>()) = std::forward_as_tuple(ts...)),
void())
{
}
int main() {
function(2);
function(1, 2, 3);
}
Reduced test-case. Here it prints nothing when detailing on why "function" is
not callable:
main.cpp: In function 'int main()':
main.cpp:9:7: error: no matching function for call to 'f(char [1])'
f(x);
^
main.cpp:4:6: note: candidate: template<int N, class T> void f(char (&)[N])
void f(char(&)[N])
^
main.cpp:4:6: note: template argument deduction/substitution failed:
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Subject: [Bug target/60290] 32-bit g++.dg/cilk-plus/CK/catch_exc.cc FAILs on Solaris/x86
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60290
--- Comment #11 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Sun May 8 11:42:49 2016
New Revision: 236005
URL: https://gcc.gnu.org/viewcvs?rev=236005&root=gcc&view=rev
Log:
Compile libcilkrts with -funwind-tables (PR target/60290)
Backport from mainline
2016-04-26 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
PR target/60290
* Makefile.am (GENERAL_FLAGS): Add -funwind-tables.
* Makefile.in: Regenerate.
Modified:
branches/gcc-6-branch/libcilkrts/ChangeLog
branches/gcc-6-branch/libcilkrts/Makefile.am
branches/gcc-6-branch/libcilkrts/Makefile.in
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Subject: [Bug c++/71007] Divergence between treatment of char[0] between OR (=> SFINAE failure) and diagnostic printing (no failure)
Date: Sun, 08 May 2016 11:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71007
--- Comment #1 from Johannes Schaub <schaub.johannes at googlemail dot com> ---
Sorry, forgot to actually add the code of the reduced testcase:
template<int N, typename T = char[N-1]>
void f(char(&)[N])
{ }
int main() {
char x[1];
f(x);
}
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Subject: [Bug target/60290] 32-bit g++.dg/cilk-plus/CK/catch_exc.cc FAILs on Solaris/x86
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--- Comment #12 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Sun May 8 11:45:03 2016
New Revision: 236006
URL: https://gcc.gnu.org/viewcvs?rev=236006&root=gcc&view=rev
Log:
Compile libcilkrts with -funwind-tables (PR target/60290)
Backport from mainline
2016-04-26 Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
PR target/60290
* Makefile.am (GENERAL_FLAGS): Add -funwind-tables.
* Makefile.in: Regenerate.
Modified:
branches/gcc-5-branch/libcilkrts/ChangeLog
branches/gcc-5-branch/libcilkrts/Makefile.am
branches/gcc-5-branch/libcilkrts/Makefile.in
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Subject: [Bug other/69582] [meta-bug] Cilk+
Date: Sun, 08 May 2016 11:46:00 -0000
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Bug 69582 depends on bug 60290, which changed state.
Bug 60290 Summary: 32-bit g++.dg/cilk-plus/CK/catch_exc.cc FAILs on Solaris/x86
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60290
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
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Subject: [Bug target/60290] 32-bit g++.dg/cilk-plus/CK/catch_exc.cc FAILs on Solaris/x86
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Target Milestone|6.2 |5.4
--- Comment #13 from Rainer Orth <ro at gcc dot gnu.org> ---
Fixed for 5.4, 6.2.
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Subject: [Bug target/71008] New: [7 Regression] FAIL: gcc.target/i386/avx512f-vprord-1.c scan-assembler-times vprord
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71008
Bug ID: 71008
Summary: [7 Regression] FAIL:
gcc.target/i386/avx512f-vprord-1.c
scan-assembler-times vprord
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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CC: kirill.yukhin at intel dot com, ubizjak at gmail dot com
Target Milestone: ---
On x86, r235852 triggers:
FAIL: gcc.target/i386/avx512f-vprord-1.c scan-assembler-times vprord[
\\t]+[^{\n]*%zmm[0-9]+(?:\n|[ \\t]+#) 1
FAIL: gcc.target/i386/avx512f-vprord-1.c scan-assembler-times vprord[
\\t]+[^{\n]*%zmm[0-9]+{%k[1-7]}(?:\n|[ \\t]+#) 1
FAIL: gcc.target/i386/avx512f-vprord-1.c scan-assembler-times vprord[
\\t]+[^{\n]*%zmm[0-9]+{%k[1-7]}{z}(?:\n|[ \\t]+#) 1
It generates vprold, instead of vprord.
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Subject: [Bug target/71008] [7 Regression] FAIL: gcc.target/i386/avx512f-vprord-1.c scan-assembler-times vprord
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-08
Target Milestone|--- |7.0
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Combine turns
(insn 20 16 22 2 (set (reg:V16SI 111)
(vec_merge:V16SI (rotatert:V16SI (reg:V16SI 112 [ x.1_2 ])
(const_int 12 [0xc]))
(subreg:V16SI (reg:V8DI 91 [ x.3_5 ]) 0)
(reg:HI 89 [ m.2_3 ])))
/export/build/gnu/gcc/build-x86_64-linux/gcc/include/avx512fintrin.h:6931 3152
{avx512f_rorv16si_mask}
(expr_list:REG_DEAD (reg:V16SI 112 [ x.1_2 ])
(expr_list:REG_DEAD (reg:V8DI 91 [ x.3_5 ])
(expr_list:REG_DEAD (reg:HI 89 [ m.2_3 ])
(nil)))))
(insn 22 20 23 2 (set (reg:V8DI 101 [ _19 ])
(subreg:V8DI (reg:V16SI 111) 0))
/export/build/gnu/gcc/build-x86_64-linux/gcc/include/avx512fintrin.h:6931 1221
{movv8di_internal}
(expr_list:REG_DEAD (reg:V16SI 111)
(nil)))
into
Trying 20 -> 22:
Successfully matched this instruction:
(set (subreg:V16SI (reg:V8DI 101 [ _19 ]) 0)
(vec_merge:V16SI (rotate:V16SI (reg:V16SI 112 [ x.1_2 ])
(const_int 20 [0x14]))
(subreg:V16SI (reg:V8DI 91 [ x.3_5 ]) 0)
(reg:HI 89 [ m.2_3 ])))
allowing combination of insns 20 and 22
It is rotatert vs rotate. How did this happen?
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Subject: [Bug target/71008] [7 Regression] FAIL: gcc.target/i386/avx512f-vprord-1.c scan-assembler-times vprord
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to H.J. Lu from comment #1)
> It is rotatert vs rotate. How did this happen?
There is:
/* Convert ROTATERT to ROTATE. */
if (code == ROTATERT)
{
unsigned int bitsize = GET_MODE_PRECISION (result_mode);
code = ROTATE;
if (VECTOR_MODE_P (result_mode))
count = bitsize / GET_MODE_NUNITS (result_mode) - count;
else
count = bitsize - count;
}
This testcase needs an update.
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Subject: [Bug debug/67482] dwarf2out.c sanitizer detects undefined behaviour negation of -9223372036854775808
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I cannot reproduce the runtime error with my instrumented trunk (7.0).
nor with instrumented 6.1.1.
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Subject: [Bug fortran/56226] Add support for DEC UNION and MAP extensions
Date: Sun, 08 May 2016 14:54:00 -0000
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--- Comment #26 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Sun, May 08, 2016 at 10:09:02AM +0000, schwab@linux-m68k.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56226
>
> --- Comment #25 from Andreas Schwab <schwab@linux-m68k.org> ---
> FAIL: gfortran.dg/dec_union_4.f90 -O0 execution test
> FAIL: gfortran.dg/dec_union_4.f90 -O1 execution test
> FAIL: gfortran.dg/dec_union_4.f90 -O2 execution test
> FAIL: gfortran.dg/dec_union_4.f90 -O3 -fomit-frame-pointer -funroll-loops
> -fpeel-loops -ftracer -finline-functions execution test
> FAIL: gfortran.dg/dec_union_4.f90 -O3 -g execution test
> FAIL: gfortran.dg/dec_union_4.f90 -Os execution test
>
WORKFORME on i686-*-freebsd and x86_64-*-freebsd.
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Subject: [Bug fortran/56226] Add support for DEC UNION and MAP extensions
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--- Comment #27 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> WORKFORME on i686-*-freebsd and x86_64-*-freebsd.
See https://gcc.gnu.org/ml/gcc-testresults/2016-05/msg00779.html for
m68k-unknown-linux-gnu.
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Subject: [Bug debug/67482] dwarf2out.c sanitizer detects undefined behaviour negation of -9223372036854775808
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--- Comment #3 from Vittorio Zecca <zeccav at gmail dot com> ---
I confirm I cannot reproduce it on 6.1.0 nor 7
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Subject: [Bug c++/71009] New: g++: ICE on modified gdb/valarith.c with -Ofast
Date: Sun, 08 May 2016 15:14:00 -0000
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Bug ID: 71009
Summary: g++: ICE on modified gdb/valarith.c with -Ofast
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: c++
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Reporter: egall at gwmail dot gwu.edu
Target Milestone: ---
Host: i386-apple-darwin9.8.0
Target: i386-apple-darwin9.8.0
Build: i386-apple-darwin9.8.0
Full command line and output:
$ make CFLAGS="-g3 -Ofast -force_cpusubtype_ALL -gstrict-dwarf -gdwarf-2 -gfull
-save-temps" V=1
this target, 'config.h' just makes its dep, 'stamp-h'
/usr/local/bin/g++ -g3 -Ofast -force_cpusubtype_ALL -gstrict-dwarf -gdwarf-2
-gfull -save-temps -arch i386 -DTARGET_I386 -I./macosx -I./macosx -DWITH_CFM=0
-DUSE_PTHREADS=1 -D_DARWIN_UNLIMITED_STREAMS -mmacosx-version-min=10.5 -I. -I.
-I./config -DHAVE_CONFIG_H -DHAVE_SYS_TYPES_H
-DLOCALEDIR="\"/usr/local/share/locale\"" -I./../include/opcode
-I./../readline/.. -I./../zlib -I../bfd -I./../bfd -I./../include
-I./../mmalloc -I../mmalloc -I../intl -I./../intl -DMI_OUT=1
-I/sw/include/libxml2 -I/sw/include -D__MigTypeCheck=1 -D__DARWIN_UNIX03=1
-Wreturn-type -Wcomment -Wtrigraphs -Wparentheses -Wpointer-arith
-Wchar-subscripts -Wno-unused -Wunused-value -Wunused-label -Wunused-result
-Wunused-variable -Wunused-but-set-variable -Wunused-function -Wempty-body
-Wmissing-declarations -Wignored-qualifiers -Wmissing-format-attribute
-Waddress -Wattributes -Wswitch -Wclobbered -Wcoverage-mismatch -Wdiv-by-zero
-Wdouble-promotion -Wfree-nonheap-object -Wsign-compare -Wtype-limits
-Winvalid-memory-model -Winvalid-pch -Wmain -Wmissing-braces
-Wmissing-include-dirs -Woverflow -Woverlength-strings -Wpragmas
-Wreturn-local-addr -Wsequence-point -Wsizeof-pointer-memaccess -Wtrampolines
-Wunknown-pragmas -Wnormalized=nfkc -Wlogical-op -Wfloat-conversion
-Wmissing-field-initializers -Wno-deprecated-declarations -Wbool-compare
-Wlogical-not-parentheses -Wsizeof-array-argument -Wswitch-bool
-Wshift-count-negative -Wshift-count-overflow -Wshift-negative-value
-Wshift-overflow=2 -Wmisleading-indentation -Wlto-type-mismatch
-Wtautological-compare -Wduplicated-cond -Wwrite-strings -Wenum-compare
-Wnonnull-compare -Wabi -Wabi-tag -Woverloaded-virtual -Wsign-promo -Wodr
-Wsubobject-linkage -Wctor-dtor-privacy -Wterminate -Wc++11-compat
-Wdelete-incomplete -Wdelete-non-virtual-dtor -Winherited-variadic-ctor
-Winvalid-offsetof -Wliteral-suffix -Wnoexcept -Wnon-template-friend
-Wnon-virtual-dtor -Wreorder -Wstrict-null-sentinel -Wmultiple-inheritance
-Wvirtual-inheritance -Wpmf-conversions -Wtemplates -Wvirtual-move-assign
-Wconversion-null -Weffc++ -Wsized-deallocation -Wplacement-new=2 -fpermissive
-Wendif-labels -Wformat -Wformat-y2k -Wformat-security -Wnonnull
-Wnonportable-cfstrings -Wno-unused-const-variable -std=gnu++03 -pedantic
-Wno-long-long -Wcast-align -Wuninitialized -Winit-self -Wmissing-noreturn
-Wvolatile-register-var -Wdisabled-optimization -Winline
-Waggressive-loop-optimizations -Wvector-operation-performance
-Wmaybe-uninitialized -Wstrict-overflow=1 -fno-strict-aliasing
-Wnull-dereference -Wframe-address -Wframe-larger-than=262144
-Wlarger-than=262144 -Wsuggest-attribute=const -Warray-bounds -Wall -Wextra
-Wno-unused-parameter -c -o valarith.o valarith.c
valarith.c: In function ‘value* value_binop(value*, value*, exp_opcode)’:
valarith.c:1408:1: internal compiler error: in gen_reg_rtx, at emit-rtl.c:1025
}
^
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make: *** [valarith.o] Error 1
The file compiles fine with all the other optimization levels I've tested
recently (-O3, -O2, -O1, -Os, -Og, -O0).
g++ version info:
$ /usr/local/bin/g++ -v
Using built-in specs.
COLLECT_GCC=/usr/local/bin/g++
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/i386-apple-darwin9.8.0/7.0.0/lto-wrapper
Target: i386-apple-darwin9.8.0
Configured with: ../configure --disable-werror
--enable-languages=c,c++,lto,objc,obj-c++ --enable-stage1-checking=release -C
--with-system-libunwind --enable-secureplt --enable-frame-pointer
--enable-version-specific-runtime-libs --enable-assert --enable-fat
--enable-portable-binary --enable-browser-plugin --enable-gconf-peer
--enable-libgcj-debug --enable-gc-debug --enable-interpreter
--enable-aot-compile-rpm --enable-java-home --with-x --enable-collections
--enable-gstreamer-peer --enable-xmlj --enable-qt-peer --enable-debug
--enable-local-sockets --without-isl --enable-objc-gc --enable-maintainer-mode
--enable-host-shared CC=/usr/local/bin/gcc CXX=/usr/local/bin/g++
AUTOCONF=/usr/local/bin/autoconf AUTOHEADER=/usr/local/bin/autoheader
AUTOM4TE=/usr/local/bin/autom4te AUTORECONF=/usr/local/bin/autoreconf
AUTOSCAN=/usr/local/bin/autoscan AUTOUPDATE=/usr/local/bin/autoupdate
IFNAMES=/usr/local/bin/ifnames
Thread model: posix
gcc version 7.0.0 20160426 (experimental) (GCC)
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--- Comment #1 from Eric Gallager <egall at gwmail dot gwu.edu> ---
Created attachment 38442
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38442&action=edit
bzipped preprocessed source
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Subject: [Bug debug/67482] dwarf2out.c sanitizer detects undefined behaviour negation of -9223372036854775808
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--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I confirm I cannot reproduce it on 6.1.0 nor 7
Closing as FIXED?
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67482
--- Comment #5 from Vittorio Zecca <zeccav at gmail dot com> ---
Running the sanitized version of gcc against the testsuite I got no
runtime error in dwarf2out.c
So I believe this issue can be closed as FIXED.
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Subject: [Bug fortran/56226] Add support for DEC UNION and MAP extensions
Date: Sun, 08 May 2016 16:03:00 -0000
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--- Comment #28 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Sun, May 08, 2016 at 03:06:39PM +0000, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56226
>
> --- Comment #27 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > WORKFORME on i686-*-freebsd and x86_64-*-freebsd.
>
> See https://gcc.gnu.org/ml/gcc-testresults/2016-05/msg00779.html for
> m68k-unknown-linux-gnu.
>
Why? There is no information there that isn't in Andreas's comment
(a content-free post).
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From: "theubik at mail dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/71010] New: error: 'begin' was not declared in this scope
Date: Sun, 08 May 2016 16:41:00 -0000
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Bug ID: 71010
Summary: error: 'begin' was not declared in this scope
Product: gcc
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For example:
// https://godbolt.org/g/Zp5ABy
#include <iostream>
class X
{
int m_x[5] = { 0, 1, 2, 3, 4 };
public:
int* first() { return &m_x[0]; }
int* last() { return &m_x[4]; }
};
namespace std
{
int* begin(X& x) { return x.first(); }
int* end(X& x) { return x.last(); }
}
int main()
{
X x;
for (auto xi : x) // error: 'begin' was not declared in this scope
std::cout << xi << std::endl;
return 0;
}
With gcc 4.8 is OK. This is bug?
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Subject: [Bug target/70998] [7 Regression]: ICE in pre_and_rev_post_order_compute, at cfganal.c
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--- Comment #4 from uros at gcc dot gnu.org ---
Author: uros
Date: Sun May 8 18:18:42 2016
New Revision: 236011
URL: https://gcc.gnu.org/viewcvs?rev=236011&root=gcc&view=rev
Log:
PR target/70998
* config/i386/sse.md (*sse2_vd_cvtsd2ss): New insn pattern.
(*sse2_vd_cvtss2sd): Ditto.
* config/i386/i386.md
(TARGET_SSE_PARTIAL_REG_DEPENDENCY float_truncate df->sf splitter):
Generate *sse2_vd_cvtsd2ss pattern.
(TARGET_SSE_PARTIAL_REG_DEPENDENCY float_extend sf->df splitter):
Generate *sse2_vd_cvtss2sd pattern.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/config/i386/sse.md
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Subject: [Bug target/70873] [7 Regressio] 20% performance regression at 482.sphinx3 after r235442 with -O2 -m32 on Haswell.
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Uroš Bizjak <ubizjak at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #31 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed.
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Uroš Bizjak <ubizjak at gmail dot com> changed:
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--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed.
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Subject: [Bug c++/71011] Wrong "may be uninitialized" warning
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Pranith Kumar <bobby.prani at gmail dot com> changed:
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--- Comment #1 from Pranith Kumar <bobby.prani at gmail dot com> ---
Created attachment 38443
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38443&action=edit
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Subject: [Bug c++/71011] New: Wrong "may be uninitialized" warning
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Bug ID: 71011
Summary: Wrong "may be uninitialized" warning
Product: gcc
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I am getting a warning that "data" may be uninitialized. But there is no such
variable being used anywhere.
src/allocate.cc: In member function ‘void allocate_c::run_a_cycle()’:
src/allocate.cc:136:19: error: ‘data’ may be used uninitialized in this
function [-Werror=maybe-uninitialized]
else if (uop->m_uop_type == UOP_IADD || // integer register
~~~~~^~~~~~~~~~
cc1plus: all warnings being treated as errors
Please find attached the source along with pre-processed file. Tested with g++
4.7 and up and it is the same in all versions.
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--- Comment #2 from Pranith Kumar <bobby.prani at gmail dot com> ---
Created attachment 38444
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71011
--- Comment #3 from Pranith Kumar <bobby.prani at gmail dot com> ---
Command which shows this error:
$ g++ -o .opt_build/src/allocate.o -c -O3 -std=c++11 -funroll-loops -Werror
-Wuninitialized -Wno-write-strings -DLONG_COUNTERS -DNO_MPI -DNO_DEBUG
src/allocate.i -Wall -Wextra
>From gcc-bugs-return-524509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 20:46:25 2016
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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++/71011] Wrong decl in a "may be uninitialized" warning
Date: Sun, 08 May 2016 20:46:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-08
Summary|Wrong "may be |Wrong decl in a "may be
|uninitialized" warning |uninitialized" warning
Ever confirmed|0 |1
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
What is happening is ssa_name which was used with uop is being renamed to be
use the data decl
Which:
uop_c *uop = (uop_c *)m_frontend_q->peek(0);
Where peek is defined as :
T peek(int entry)
{
....
T data;
int count = 0;
for (int ii = m_current_index; ii < m_current_index + m_size; ++ii) {
int index = ii % m_size;
for (auto I = m_entry[index].begin(), E = m_entry[index].end(); I != E;
++I) {
if (count++ == entry) {
data = (*I)->m_data;
break;
}
}
}
return data;
}
If m_size was 0, then data would be unitialized or if
m_entry[m_current_index].empty() is false. I have not dug in to see m_size can
not be non 0 or GCC can figure out if it can be non 0 or the other case is
true.
So only the decl in the warning is incorrect as far as I can tell.
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/71012] New: ICE: in expand_expr_real_2, at expr.c:9348 when compiling stress-ng
Date: Sun, 08 May 2016 21:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71012
Bug ID: 71012
Summary: ICE: in expand_expr_real_2, at expr.c:9348 when
compiling stress-ng
Product: gcc
Version: 5.3.1
URL: https://buildd.debian.org/status/fetch.php?pkg=stress-
ng&arch=powerpcspe&ver=0.06.01-1&stamp=1462574245
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: glaubitz at physik dot fu-berlin.de
Target Milestone: ---
Host: powerpc-linux-gnuspe
Target: powerpc-linux-gnuspe
Created attachment 38445
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38445&action=edit
Pre-processed source for stress-vecmath.c
Hi!
When building stress-ng on powerpc-linux-gnuspe, an internal compiler error
occurs when compiling stress-vecmath.c:
cc -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wall
-Wextra -DVERSION="0.06.01" -O2 -DHAVE_APPARMOR -DHAVE_KEYUTILS_H
-DHAVE_XATTR_H -DHAVE_LIB_BSD -DHAVE_LIB_Z -DHAVE_LIB_CRYPT -DHAVE_LIB_RT
-DHAVE_LIB_PTHREAD -DHAVE_FLOAT_DECIMAL -DHAVE_SECCOMP_H -DHAVE_LIB_AIO
-DHAVE_SYS_CAP_H -c -o stress-vecmath.o stress-vecmath.c
stress-vecmath.c: In function 'stress_vecmath':
stress-vecmath.c:49:4: internal compiler error: in expand_expr_real_2, at
expr.c:9348
a ^= c; \
^
stress-vecmath.c:114:4: note: in expansion of macro 'OPS'
OPS(a64, b64, c64, s64);
^
0x103166eb expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
../../src/gcc/expr.c:9348
0x1021f24b expand_gimple_stmt_1
../../src/gcc/cfgexpand.c:3462
0x1021f24b expand_gimple_stmt
../../src/gcc/cfgexpand.c:3522
0x10222ed3 expand_gimple_basic_block
../../src/gcc/cfgexpand.c:5534
0x10224f33 execute
../../src/gcc/cfgexpand.c:6152
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-5/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccRHm88P.out file, please attach this to
your bugreport.
This has been failing for quite some time. However, it seems it does not seem
to be related to gcc directly as both the last successful build [1] and the
last unsuccessful build [2] used both the same revision of gcc-4.9.2: r218987.
Attaching the pre-processed source from the last build with gcc-5.
Adrian
> [1] https://buildd.debian.org/status/fetch.php?pkg=stress-ng&arch=powerpcspe&ver=0.03.12-1&stamp=1422673290
> [2] https://buildd.debian.org/status/fetch.php?pkg=stress-ng&arch=powerpcspe&ver=0.03.13-1&stamp=1422840779
>From gcc-bugs-return-524511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 21:46:20 2016
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From: "danglin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/71013] New: [7 Regression] c-common.c:12810:37: error: 'LLONG_MAX' was not declared in this scope
Date: Sun, 08 May 2016 21:46:00 -0000
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Bug ID: 71013
Summary: [7 Regression] c-common.c:12810:37: error: 'LLONG_MAX'
was not declared in this scope
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: danglin at gcc dot gnu.org
CC: doko at gcc dot gnu.org
Target Milestone: ---
Host: hppa64-hp-hpux11.11
Target: hppa64-hp-hpux11.11
Build: hppa64-hp-hpux11.11
In stage1,
g++ -std=gnu++98 -fno-PIE -c -DIN_GCC_FRONTEND -DIN_GCC_FRONTEND -g -DIN_GCC
-fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall
-Wno-narrowing
-Wwrite-strings -Wcast-qual -Wno-format -Wmissing-format-attribute
-Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings
-DHAVE_CONFIG_H -I. -Ic-family -I../../gcc/gcc -I../../gcc/gcc/c-family
-I../..
/gcc/gcc/../include -I./../intl -I../../gcc/gcc/../libcpp/include
-I/opt/gnu64/g
cc/gmp/include -I../../gcc/gcc/../libdecnumber
-I../../gcc/gcc/../libdecnumber/dpd -I../libdecnumber
-I../../gcc/gcc/../libbacktrace -o c-family/c-common.o -
MT c-family/c-common.o -MMD -MP -MF c-family/.deps/c-common.TPo
../../gcc/gcc/c-
family/c-common.c
../../gcc/gcc/c-family/c-common.c: In function 'time_t
get_source_date_epoch()':
../../gcc/gcc/c-family/c-common.c:12810:37: error: 'LLONG_MAX' was not declared
in this scope
if ((errno == ERANGE && (epoch == LLONG_MAX || epoch == LLONG_MIN))
^
../../gcc/gcc/c-family/c-common.c:12810:59: error: 'LLONG_MIN' was not declared
in this scope
if ((errno == ERANGE && (epoch == LLONG_MAX || epoch == LLONG_MIN))
^
make[3]: *** [c-family/c-common.o] Error 1
Bootstrap compiler was:
gcc version 5.3.1 20160217 [gcc-5-branch revision 233498] (GCC)
>From gcc-bugs-return-524512-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 22:03:32 2016
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From: "gccbugzilla at limegreensocks dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/30527] Use of input/output operands in __asm__ templates not fully documented
Date: Sun, 08 May 2016 22:03:00 -0000
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David <gccbugzilla at limegreensocks dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gccbugzilla@limegreensocks.
| |com
--- Comment #5 from David <gccbugzilla at limegreensocks dot com> ---
These modifiers are intended primarily for use by Machine Descriptions. As a
result, some of them aren't going to be meaningful/usable by inline asm code.
And it makes sense to leave open the option to change their meaning should
future MD work require it, something that documenting them all would prevent.
On the other hand, some of these values are indeed quite useful for inline asm.
The compromise, as evidenced by 6.43.2.7 (added in v5.x), is to document
certain commonly needed/used modifiers (such as the %k0 referenced above).
If there is some additional modifier that you need, I'd recommend opening a new
bug and making an explicit case for it.
In the meantime, I recommend closing this bug (as fixed).
>From gcc-bugs-return-524513-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 22:04:30 2016
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From: "gccbugzilla at limegreensocks dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug inline-asm/39440] User Manual: describe asm ("%a0,%c0"::)
Date: Sun, 08 May 2016 22:04:00 -0000
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--- Comment #5 from David <gccbugzilla at limegreensocks dot com> ---
This is a duplicate of 30527.
A subset of the most commonly needed/used modifiers have been added to the docs
as of 5.x (including the %c0 referenced above). For this reason, I recommend
this bug be closed.
If there is some additional modifier that you need, I'd recommend opening a new
bug and making an explicit case for it.
>From gcc-bugs-return-524514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 22:06:22 2016
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Subject: [Bug inline-asm/43319] Lack of documentation on asm extension
Date: Sun, 08 May 2016 22:06:00 -0000
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David <gccbugzilla at limegreensocks dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gccbugzilla@limegreensocks.
| |com
--- Comment #3 from David <gccbugzilla at limegreensocks dot com> ---
This is a duplicate of 30527.
A subset of the most commonly needed/used modifiers have been added to the docs
as of 5.x (including the %c1 referenced above).
%P (also mentioned above) is not currently documented, and I see no reason that
it should be. An examination of glibc suggests that instead of using the
undocumented/unsupported %P1, they can accomplish what they need with the
already documented %c1.
>From gcc-bugs-return-524515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 22:36:26 2016
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Subject: [Bug fortran/71014] New: associate statement inside omp parallel do appears to disable default private attribute for inner loop indices
Date: Sun, 08 May 2016 22:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71014
Bug ID: 71014
Summary: associate statement inside omp parallel do appears to
disable default private attribute for inner loop
indices
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: klindsay at ucar dot edu
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Created attachment 38446
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38446&action=edit
program demonstrating problem
Hi,
I have some code using the associate construct inside an openmp parallel do
loop. The associate construct appears to disable giving loop indices inside the
construct the private attribute. The attached program demonstrates the problem.
The inner loop adds the numbers 1..100, and should yield 5050. This is done 8
times. When I run the program with OMP_NUM_THREADS=8, I usually get mismatches
between s_true and s. Sometimes the program hangs, seemingly in an infinite
loop. I am running this on a Linux system.
If I add a PRIVATE(i) clause to the OMP directive, the problem goes away.
If I comment out the associate construct, the problem goes away, even without
adding a PRIVATE(i) clause. Note that the associate construct in this example
is not really doing anything. The associated name is not actually used inside
the associate construct.
Could this be looked into please?
Thank you,
Keith Lindsay
>From gcc-bugs-return-524516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun May 08 23:41:11 2016
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Subject: [Bug c++/69523] -Wliteral-suffix should not warn within namespace std
Date: Sun, 08 May 2016 23:41:00 -0000
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--- Comment #5 from Eric Fiselier <eric at efcs dot ca> ---
Would it be possible to add a -Wno-literal-suffix flag? I really want to use
warning with GCC, but I need to disable this one.
>From gcc-bugs-return-524517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 00:06:04 2016
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Subject: [Bug middle-end/70987] missing -Wuninitialized calling built-in string functions with an uninitialized argument
Date: Mon, 09 May 2016 00:06:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This seems to me a duplicate of PR10138 (at least in C++), or closely related.
>From gcc-bugs-return-524518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 05:58:50 2016
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From: "asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70986] ICE on valid code at -O3 on x86_64-linux-gnu in combine_blocks, at tree-if-conv.c:2219
Date: Mon, 09 May 2016 05:58:00 -0000
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Arseny Solokha <asolokha at gmx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |asolokha at gmx dot com
--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
int gi, dg;
void
fe (void)
{
int ka = gi;
for (;;)
{
if (ka != 0)
{
if (dg != 0)
gi = 0;
++ka;
}
++dg;
}
}
-O2 -ftree-loop-if-convert-stores is enough for both cases.
>From gcc-bugs-return-524519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 06:06:29 2016
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ipa/71015] New: [7 Regression] ICE in inline_small_functions, at ipa-inline.c:1881
Date: Mon, 09 May 2016 06:06:00 -0000
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Bug ID: 71015
Summary: [7 Regression] ICE in inline_small_functions, at
ipa-inline.c:1881
Product: gcc
Version: 7.0
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Probably since r236012 I get:
trippels@gcc2-power8 voicemail % cat VoicemailParent.ii
struct A {
virtual unsigned Release() = 0;
};
struct nsCOMPtr_base {
~nsCOMPtr_base() { mRawPtr->Release(); }
A *mRawPtr;
};
struct PVoicemailParent {
virtual ~PVoicemailParent();
};
struct B : PVoicemailParent, A {
unsigned Release();
nsCOMPtr_base mService;
};
unsigned B::Release() {}
trippels@gcc2-power8 voicemail % c++ -O3 -c VoicemailParent.ii
VoicemailParent.ii:15:24: internal compiler error: in inline_small_functions,
at ipa-inline.c:1881
unsigned B::Release() {}
^
0x1126c37b inline_small_functions
../../gcc/gcc/ipa-inline.c:1881
0x1126c37b ipa_inline
../../gcc/gcc/ipa-inline.c:2437
0x1126c37b execute
../../gcc/gcc/ipa-inline.c:2848
Please submit a full bug report,
>From gcc-bugs-return-524520-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 07:18:01 2016
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Subject: [Bug tree-optimization/71006] [6/7 Regression] ICE: verify_gimple failed (error: type mismatch in conditional expression) w/ -O1 -ftree-loop-vectorize
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-09
CC| |ienkovich at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
Target Milestone|--- |6.2
Summary|[7 Regression] ICE: |[6/7 Regression] ICE:
|verify_gimple failed |verify_gimple failed
|(error: type mismatch in |(error: type mismatch in
|conditional expression) w/ |conditional expression) w/
|-O1 -ftree-loop-vectorize |-O1 -ftree-loop-vectorize
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r230098.
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--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon May 9 07:42:45 2016
New Revision: 236021
URL: https://gcc.gnu.org/viewcvs?rev=236021&root=gcc&view=rev
Log:
2016-05-09 Richard Biener <rguenther@suse.de>
PR fortran/70937
* trans-decl.c: Include gimplify.h for unshare_expr.
(gfc_trans_vla_one_sizepos): Unshare exprs before inserting
them into the IL.
* gfortran.dg/pr70937.f90: New testcase.
Added:
trunk/gcc/testsuite/gfortran.dg/pr70937.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/trans-decl.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-524522-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 07:48:15 2016
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-524524-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 08:26:42 2016
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Subject: [Bug c/71013] [7 Regression] c-common.c:12810:37: error: 'LLONG_MAX' was not declared in this scope
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |build
Priority|P3 |P1
>From gcc-bugs-return-524523-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 08:26:30 2016
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Subject: [Bug c/71013] [7 Regression] c-common.c:12810:37: error: 'LLONG_MAX' was not declared in this scope
Date: Mon, 09 May 2016 08:26:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Target Milestone|--- |7.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
How do you get LLONG_MAX on hpux? There is HAVE_LONG_LONG[_INT] in
auto-host.h,
maybe that needs to be used here.
>From gcc-bugs-return-524525-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 08:29:02 2016
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Subject: [Bug tree-optimization/71006] [6/7 Regression] ICE: verify_gimple failed (error: type mismatch in conditional expression) w/ -O1 -ftree-loop-vectorize
Date: Mon, 09 May 2016 08:29:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-checking,
| |ice-on-valid-code
Priority|P3 |P2
>From gcc-bugs-return-524526-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 08:31:48 2016
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Subject: [Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Mon, 09 May 2016 08:31:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-09
CC| |rguenth at gcc dot gnu.org
Known to work| |5.3.0
Target Milestone|--- |6.2
Summary|[6 Regression] |[6/7 Regression]
|-fstrict-aliasing breaks |-fstrict-aliasing breaks
|Boost's short string |Boost's short string
|optimization implementation |optimization implementation
Ever confirmed|0 |1
Known to fail| |6.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed the testcase fails with -O2 for GCC 6 and trunk but not GCC 5.
>From gcc-bugs-return-524527-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 08:32:11 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/70986] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in combine_blocks, at tree-if-conv.c:2219
Date: Mon, 09 May 2016 08:32:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |6.1.0
Keywords| |ice-on-valid-code
Last reconfirmed| |2016-05-09
CC| |ktkachov at gcc dot gnu.org
Ever confirmed|0 |1
Summary|ICE on valid code at -O3 on |[7 Regression] ICE on valid
|x86_64-linux-gnu in |code at -O3 on
|combine_blocks, at |x86_64-linux-gnu in
|tree-if-conv.c:2219 |combine_blocks, at
| |tree-if-conv.c:2219
Target Milestone|--- |7.0
Known to fail| |7.0
--- Comment #2 from ktkachov at gcc dot gnu.org ---
Confirmed on aarch64 also.
I have another testcase that ICEs like this.
int a, b;
int
fn1 (int p1)
{
return p1 < 0 ? p1 : a;
}
void
fn2 ()
{
lbl_100:
b = 1;
for (; b != 21; b = fn1 (b))
;
goto lbl_100;
}
caused by the same commit as PR 70964, but I don't know if the bugs are
distinct
>From gcc-bugs-return-524528-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 08:41:47 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Mon, 09 May 2016 08:41:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is similar to that in PR70054 in that for example string::swap_data
copy-initializes repr_t which has the long_raw_t member that is not of the
type that it is modified as (for some odd reason).
(just from looking at the source now, not analyzing what GCC does to it)
Why doesn't boost just use
union repr_t
{
long_t l;
short_t s;
...
?
>From gcc-bugs-return-524529-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 08:42:18 2016
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/71016] New: [6/7 Regression] Redundant sign extension with conditional __builtin_clzl
Date: Mon, 09 May 2016 08:42:00 -0000
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Bug ID: 71016
Summary: [6/7 Regression] Redundant sign extension with
conditional __builtin_clzl
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ktkachov at gcc dot gnu.org
Target Milestone: ---
Target: aarch64
Consider:
long int foo (long i)
{
return (i == 0) ? 17 : __builtin_clzl (i);
}
On aarch64 with GCC 5 at -O2 we generate:
foo:
mov x2, 17
clz x1, x0
cmp x0, xzr
csel x0, x1, x2, ne
ret
whereas with GCC 6 and trunk we generate:
foo:
mov w1, 17
clz x2, x0
cmp x0, 0
csel w0, w1, w2, eq
sxtw x0, w0 //redundant sign-extend
ret
In GCC 5 the tree structure being expanded is:
i.1_3 = (long unsigned int) i_2(D);
_4 = __builtin_clzl (i.1_3);
iftmp.0_5 = (long int) _4;
;; basic block 4, loop depth 0
;; pred: 3
;; 2
# iftmp.0_1 = PHI <iftmp.0_5(3), 17(2)>
return iftmp.0_1;
so the RTL optimisers see the DI mode clz followed by a subreg and
a sign-extend and optimise it away.
However trunk now moves the sign-extend out of the conditional:
i.1_3 = (long unsigned int) i_2(D);
_4 = __builtin_clzl (i.1_3);
;; basic block 4, loop depth 0
;; pred: 3
;; 2
# _7 = PHI <_4(3), 17(2)>
prephitmp_8 = (long int) _7;
return prephitmp_8;
So it's very hard for RTL ifcvt or combine or ree to catch it.
>From gcc-bugs-return-524530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 08:50:04 2016
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Subject: [Bug fortran/66328] Wrong initialization of derived-type DATA
Date: Mon, 09 May 2016 08:50:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
The bug reappears on trunk if I revert r230580.
>From gcc-bugs-return-524531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 08:52:46 2016
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Subject: [Bug tree-optimization/70985] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: verify_gimple failed
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70985
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
>From gcc-bugs-return-524532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 08:56:36 2016
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Subject: [Bug tree-optimization/70986] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in combine_blocks, at tree-if-conv.c:2219
Date: Mon, 09 May 2016 08:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70986
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Same cause as the other PR.
2016-05-03 Jakub Jelinek <jakub@redhat.com>
Richard Biener <rguenther@suse.de>
PR tree-optimization/70916
* tree-if-conv.c: Include cfganal.h.
(pass_if_conversion::execute): Call connect_infinite_loops_to_exit
and remove_fake_exit_edges around the optimization pass.
>From gcc-bugs-return-524533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 08:59:18 2016
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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/71017] New: libgcc/config/i386/cpuinfo.c:346:17: runtime error: left shift of 1 by 31 places cannot be represented in type 'int'
Date: Mon, 09 May 2016 08:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71017
Bug ID: 71017
Summary: libgcc/config/i386/cpuinfo.c:346:17: runtime error:
left shift of 1 by 31 places cannot be represented in
type 'int'
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: dominiq at lps dot ens.fr
Target Milestone: ---
When compiling some tests, e.g. gcc.c-torture/compile/20000511-1.c -O, using
gcc built with -fsanitize=undefined, I get the following error at runtime
libgcc/config/i386/cpuinfo.c:346:17: runtime error: left shift of 1 by 31
places cannot be represented in type 'int'
This is fixed with the following patch
--- ../_clean/gcc/config/i386/cpuid.h 2016-01-04 19:51:13.000000000 +0100
+++ gcc/config/i386/cpuid.h 2016-05-01 12:49:40.000000000 +0200
@@ -90,7 +90,7 @@
#define bit_AVX512CD (1 << 28)
#define bit_SHA (1 << 29)
#define bit_AVX512BW (1 << 30)
-#define bit_AVX512VL (1 << 31)
+#define bit_AVX512VL (1u << 31)
/* %ecx */
#define bit_PREFETCHWT1 (1 << 0)
>From gcc-bugs-return-524534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 09:01:10 2016
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Subject: [Bug middle-end/70992] Infinite recursion between fold_build2_stat_loc and fold_binary_loc w/ -fwrapv
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|ice-on-invalid-code |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-09
Version|unknown |6.1.0
Ever confirmed|0 |1
Known to fail| |4.3.5
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed back to GCC 4.3.
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Subject: [Bug bootstrap/70997] [7 Regression] bootstrap broken on s390x-linux-gnu
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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-524536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 09:02:34 2016
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Subject: [Bug ipa/71015] [7 Regression] ICE in inline_small_functions, at ipa-inline.c:1881
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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-524537-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 09:13:33 2016
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Subject: [Bug middle-end/70992] Infinite recursion between fold_build2_stat_loc and fold_binary_loc w/ -fwrapv
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think the issue is that the associate case treats (0 % 0 + 1) * 2 as constant
but that gets further "simplified" when combined with the rest.
In the end our refusal to simplify 0 % 0 to 0 causes things to go downhill
(we _do_ simplify 0 % a to 0!)
(for mod (ceil_mod floor_mod round_mod trunc_mod)
/* 0 % X is always zero. */
(simplify
(mod integer_zerop@0 @1)
/* But not for 0 % 0 so that we can get the proper warnings and errors. */
(if (!integer_zerop (@1))
@0))
>From gcc-bugs-return-524539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 09:24:50 2016
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Subject: [Bug tree-optimization/70985] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: verify_gimple failed
Date: Mon, 09 May 2016 09:24:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
This wasn't supposed to apply to non-registers even though technically it
could.
I'm going to disable that on GIMPLE instead [I'm still thinking on how to deal
with "memory" stuff in match.pd]
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Subject: [Bug ipa/71015] [7 Regression] ICE in inline_small_functions, at ipa-inline.c:1881
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-09
CC| |mpolacek at gcc dot gnu.org
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug tree-optimization/70985] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: verify_gimple failed
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--- Comment #4 from ktkachov at gcc dot gnu.org ---
I'm also seeing an ICE on the testcase:
struct {
char f0;
unsigned f2 : 16;
} e;
struct U2 {
char f3;
};
int **a;
int b, c, h, i, j;
int *d, *g, *k;
volatile struct U2 f;
void fn1() {
for (; b;) {
f;
**a = *g = *d = *k != i == h;
if (j)
c = e.f2;
else
for (;;)
;
}
}
at -O3. Given that it contains bitfields too I'm guessing it's the same cause.
mycrash.c:15:6: error: invalid operand in unary operation
void fn1() {
^~~
# VUSE <.MEM_18(D)>
e_f2_lsm0.12_27 = (short unsigned int) MEM[(struct *)&e + 1B];
mycrash.c:15:6: error: invalid operands in binary operation
mycrash.c:15:6: error: incorrect sharing of tree nodes
MEM[(struct *)&e + 1B]
# VUSE <.MEM_22>
_14 = MEM[(struct *)&e + 1B] & 65535;
mycrash.c:15:6: internal compiler error: verify_gimple failed
0xb23a53 verify_gimple_in_cfg(function*, bool)
$SRC/gcc/tree-cfg.c:5166
0xa14349 execute_function_todo
$SRC/gcc/passes.c:1968
0xa14554 do_per_function
$SRC/gcc/passes.c:1652
0xa1469c execute_todo
$SRC/gcc/passes.c:2020
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.
>From gcc-bugs-return-524541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 09:33:55 2016
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Subject: [Bug rtl-optimization/66940] ifcvt.c:1907 signed integer overflow
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----------------------------------------------------------------------------
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
Confirmed also on current trunk by adding:
gcc_assert (desired_val != HOST_WIDE_INT_MAX);
before the:
if (actual_val == desired_val + 1)
check
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Subject: [Bug c++/70984] Templated derived class erroneously allows taking address of private base class member functions
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please check the known bugs linked to from PR 59002 as I'm pretty sure this is
a duplicate of one of them.
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Subject: [Bug c++/26904] A template named the same as its member confuses lookup through inheritance
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
For the record, it seems to have first been fixed for GCC 4.5
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>From gcc-bugs-return-524547-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 09:49:50 2016
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Subject: [Bug c++/69523] -Wliteral-suffix should not warn within namespace std
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
We already support that flag, but the warning that you get on the declaration
of operator""s is not controlled by that flag.
The warning should be controlled by *some* flag, but I'm not sure whether or
not linking it with -Wliteral-suffix makes sense. I'll prepare a patch and see
what people think.
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Subject: [Bug c++/71010] error: 'begin' was not declared in this scope
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
No, it's not a bug. Range-based 'for' is not supposed to find std::begin and
std::end unless std is an associated namespace.
Furthermore, your code has undefined behaviour, it is forbidden to add your own
functions to namespace std. The correct way to do it is to write the begin/end
overloads in the same namespace as your type (in this case that's the global
namespace).
class X
{
int m_x[5] = { 0, 1, 2, 3, 4 };
public:
int* first() { return &m_x[0]; }
int* last() { return &m_x[4]; }
};
int* begin(X& x) { return x.first(); }
int* end(X& x) { return x.last(); }
This works with all versions of GCC that support C++11.
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Subject: [Bug inline-asm/39440] User Manual: describe asm ("%a0,%c0"::)
Date: Mon, 09 May 2016 10:06:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
dup
*** This bug has been marked as a duplicate of bug 30527 ***
>From gcc-bugs-return-524550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 10:06:52 2016
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Subject: [Bug inline-asm/30527] Use of input/output operands in __asm__ templates not fully documented
Date: Mon, 09 May 2016 10:06:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |etienne_lorrain at yahoo dot fr
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 39440 has been marked as a duplicate of this bug. ***
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Subject: [Bug inline-asm/30527] Use of input/output operands in __asm__ templates not fully documented
Date: Mon, 09 May 2016 10:07:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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CC| |pi3orama at gmail dot com
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 43319 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-524551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 10:07:27 2016
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Subject: [Bug inline-asm/43319] Lack of documentation on asm extension
Date: Mon, 09 May 2016 10:07:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 30527 ***
>From gcc-bugs-return-524553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 10:08:08 2016
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Subject: [Bug libstdc++/71005] recursive_directory_iterator::operator++(int) incorrectly implemented
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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> ---
It looks like directory_iterator will have the same problem, as both just copy
the object, which shares ownership of the underlying representation instead of
making a new state. Oops.
>From gcc-bugs-return-524554-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 10:10:29 2016
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Subject: [Bug libstdc++/71004] recursive_directory_iterator does not have a user-provided default ctor
Date: Mon, 09 May 2016 10:10:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon May 9 10:09:37 2016
New Revision: 236023
URL: https://gcc.gnu.org/viewcvs?rev=236023&root=gcc&view=rev
Log:
libstdc++/71004 fix recursive_directory_iterator default constructor
PR libstdc++/71004
* include/experimental/bits/fs_dir.h (recursive_directory_iterator):
Initialize scalar member variables in default constructor.
* testsuite/experimental/filesystem/iterators/
recursive_directory_iterator.cc: Teste default construction.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/experimental/bits/fs_dir.h
trunk/libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc
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Subject: [Bug bootstrap/70997] [7 Regression] bootstrap broken on s390x-linux-gnu
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--- Comment #1 from Matthias Klose <doko at gcc dot gnu.org> ---
only seen when configured with --enable-default-pie
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Subject: [Bug lto/71018] New: lto + ipa-pta causes exception with trivial boost::ptime code.
Date: Mon, 09 May 2016 10:41:00 -0000
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Bug ID: 71018
Summary: lto + ipa-pta causes exception with trivial
boost::ptime code.
Product: gcc
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Created attachment 38447
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38447&action=edit
My code
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Subject: [Bug target/71019] New: AVX512BW instructions emitted even without AVX512BW
Date: Mon, 09 May 2016 10:47:00 -0000
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Bug ID: 71019
Summary: AVX512BW instructions emitted even without AVX512BW
Product: gcc
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With -mavx512vl -mno-avx512bw GCC emits vpack{ss,us}{wb,dw} EVEX encoded
instructions even when they are only in the AVX512BW ISA.
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Subject: [Bug lto/71018] lto + ipa-pta causes exception with trivial boost::ptime code.
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--- Comment #1 from riad93 at mail dot ru ---
Accidentaly sent before adding info
-v:
Using built-in specs.
COLLECT_GCC=/opt/gcc-6/bin/c++-6.1
COLLECT_LTO_WRAPPER=/opt/gcc-6/libexec/gcc/x86_64-pc-linux-gnu/6.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure --enable-languages=c,c++ --enable-shared
--enable-threads=posix --program-suffix=-6.1 --with-system-zlib
--prefix=/opt/gcc-6/ --disable-multilib --disable-bootstrap
Thread model: posix
gcc version 6.1.0 (GCC)
Command line:
/opt/gcc-6/bin/c++-6.1 -O2 -fipa-pta -flto=24 flto_test.cpp -o flto_test
-Wl,-rpath,/opt/gcc-6/lib64 -Wall -Wextra -fno-strict-aliasing -fwrapv
-fsanitize=undefined && ./flto_test
Output:
flto_test.cpp: In function ‘time_type {anonymous}::utc_to_local(const
time_type&)’:
flto_test.cpp:18:22: warning: variable ‘dd’ set but not used
[-Wunused-but-set-variable]
date_duration_type dd = t.date() - time_t_start_day;
^~
terminate called after throwing an instance of
'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::gregorian::bad_year>
>'
what(): Year is out of valid range: 1400..10000
[1] 10332 abort ./flto_test
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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> ---
Created attachment 38448
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38448&action=edit
gcc7-pr71019.patch
Untested fix.
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Subject: [Bug lto/71018] lto + ipa-pta causes exception with trivial boost::ptime code.
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--- Comment #2 from riad93 at mail dot ru ---
Created attachment 38449
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38449&action=edit
preprocessed code
It's in tar.gz since it's too big for upload here as plaintext
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Subject: [Bug lto/71018] lto + ipa-pta causes exception with trivial boost::ptime code.
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is obsolete| |
--- Comment #3 from riad93 at mail dot ru ---
Created attachment 38450
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preprocessed code
Fixed preprocessed code
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Subject: [Bug tree-optimization/71016] [6/7 Regression] Redundant sign extension with conditional __builtin_clzl
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
So PRE still does the desired tranform:
<bb 2>:
if (i_4(D) != 0)
goto <bb 3>;
else
goto <bb 4>;
<bb 3>:
i.1_1 = (long unsigned int) i_4(D);
_2 = __builtin_clzl (i.1_1);
_5 = (long int) _2;
<bb 4>:
# _7 = PHI <_2(3), 17(2)>
# prephitmp_8 = PHI <_5(3), 17(2)>
return prephitmp_8;
but then later phiopt comes along and un-does it:
--- t.c.172t.forwprop4 2016-05-09 13:15:20.830707963 +0200
+++ t.c.173t.phiopt3 2016-05-09 13:15:20.830707963 +0200
@@ -6,7 +6,7 @@
{
long unsigned int i.1_1;
int _2;
- long int _5;
+ int _7;
long int prephitmp_8;
<bb 2>:
@@ -18,10 +18,10 @@
<bb 3>:
i.1_1 = (long unsigned int) i_4(D);
_2 = __builtin_clzl (i.1_1);
- _5 = (long int) _2;
<bb 4>:
- # prephitmp_8 = PHI <_5(3), 17(2)>
+ # _7 = PHI <_2(3), 17(2)>
+ prephitmp_8 = (long int) _7;
return prephitmp_8;
}
I think this was intended to be an enablement transform of some sort -
obviously
here it mis-fires.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kuganv at linaro dot org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
PHI prephitmp_8 changed to factor conversion out from COND_EXPR.
New stmt with CAST that defines prephitmp_8.
Added with
2015-07-12 Kugan Vivekanandarajah <kuganv@linaro.org>
PR middle-end/66726
* tree-ssa-phiopt.c(factor_out_conditional_conversion): New function.
tree_ssa_phiopt_worker): Call it.
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Only fixed on trunk so far.
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Subject: [Bug lto/71018] lto + ipa-pta causes exception with trivial boost::ptime code.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71018
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Possibly related to PR70760 or PR70785. Can't reproduce with GCC 6 branch head
(so I'd say 70785), building GCC 6.1.0 right now.
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From: "pdewacht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/71020] New: SSA corruption: Unable to coalesce ssa_names 2 and 13 which are marked as MUST COALESCE.
Date: Mon, 09 May 2016 11:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71020
Bug ID: 71020
Summary: SSA corruption: Unable to coalesce ssa_names 2 and 13
which are marked as MUST COALESCE.
Product: gcc
Version: 6.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: pdewacht at gmail dot com
Target Milestone: ---
This function triggers an internal compiler error. Reduced using C-Reduce from
a source file from FMSLogo.
$ cat ssa2.c
binary() {
double b = get();
_setjmp();
b = sqrt(b);
err_logo();
}
$ gcc-6 -O -w -c ssa2.c
Unable to coalesce ssa_names 2 and 13 which are marked as MUST COALESCE.
b_2(ab) and b_13(ab)
ssa2.c: In function ‘binary’:
ssa2.c:1:1: internal compiler error: SSA corruption
binary() {
^~~~~~
0xa90f9c fail_abnormal_edge_coalesce
../../src/gcc/tree-ssa-coalesce.c:1010
0xa90f9c coalesce_partitions
../../src/gcc/tree-ssa-coalesce.c:1411
0xa90f9c coalesce_ssa_name()
../../src/gcc/tree-ssa-coalesce.c:1895
0xa4798f remove_ssa_form
../../src/gcc/tree-outof-ssa.c:978
0xa4798f rewrite_out_of_ssa(ssaexpand*)
../../src/gcc/tree-outof-ssa.c:1202
0x69b2e0 execute
../../src/gcc/cfgexpand.c:6136
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-6/README.Bugs> for instructions.
$ gcc-6 -v
Using built-in specs.
COLLECT_GCC=gcc-6
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 6.1.1-1'
--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 --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 6.1.1 20160430 (Debian 6.1.1-1)
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From: "dave.anglin at bell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/71013] [7 Regression] c-common.c:12810:37: error: 'LLONG_MAX' was not declared in this scope
Date: Mon, 09 May 2016 11:31:00 -0000
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--- Comment #2 from dave.anglin at bell dot net ---
On 2016-05-09, at 4:26 AM, rguenth at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71013
>
> Richard Biener <rguenth at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Target Milestone|--- |7.0
>
> --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
> How do you get LLONG_MAX on hpux? There is HAVE_LONG_LONG[_INT] in
> auto-host.h,
> maybe that needs to be used here.
LLONG_MAX is not defined in hpux11.11. It comes from fixed limits.h:
./lib/gcc/hppa64-hp-hpux11.11/5.3.1/include-fixed/limits.h:# undef LLONG_MIN
./lib/gcc/hppa64-hp-hpux11.11/5.3.1/include-fixed/limits.h:# define LLONG_MIN
(-LLONG_MAX - 1LL)
--
John David Anglin dave.anglin@bell.net
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Subject: [Bug tree-optimization/71020] [6/7 Regression] SSA corruption: Unable to coalesce ssa_names 2 and 13 which are marked as MUST COALESCE.
Date: Mon, 09 May 2016 11:47:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-09
Known to work| |5.3.0
Target Milestone|--- |6.2
Summary|SSA corruption: Unable to |[6/7 Regression] SSA
|coalesce ssa_names 2 and 13 |corruption: Unable to
|which are marked as MUST |coalesce ssa_names 2 and 13
|COALESCE. |which are marked as MUST
| |COALESCE.
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
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Subject: [Bug libstdc++/71004] recursive_directory_iterator does not have a user-provided default ctor
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71004
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Eric Fiselier from comment #1)
> recursive_directory_iterator it;
> assert(it.recursion_pending() == false);
> assert(it.recursion_pending() == true);
N.B. This test is undefined, those observer functions have preconditions that
they are not called on the end iterator.
>From gcc-bugs-return-524571-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 11:50:48 2016
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Subject: [Bug libstdc++/71004] recursive_directory_iterator does not have a user-provided default ctor
Date: Mon, 09 May 2016 11:50:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon May 9 11:50:01 2016
New Revision: 236028
URL: https://gcc.gnu.org/viewcvs?rev=236028&root=gcc&view=rev
Log:
libstdc++/71004 fix recent additions to testcase
PR libstdc++/71004
* testsuite/experimental/filesystem/iterators/
recursive_directory_iterator.cc: Fix test02 to not call member
functions on invalid iterator, and use VERIFY not assert.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc
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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/71020] [6/7 Regression] SSA corruption: Unable to coalesce ssa_names 2 and 13 which are marked as MUST COALESCE.
Date: Mon, 09 May 2016 11:57:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
CC| |rsandifo at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
b_13(ab) = SQRT (b_1(ab));
DCE_COND_LB.2_15 = b_1(ab);
if (DCE_COND_LB.2_15 u>= 0.0)
introduced by cdce. Likely triggered by Richards changes. We have
<bb 4>:
# b_1(ab) = PHI <b_9(3), b_2(ab)(5)>
_setjmp ();
b_13(ab) = sqrt (b_1(ab));
err_logo ();
goto <bb 6>;
where one way to fix this is push b_1(ab) to a non-abnormal temporary
before the call and re-use that. Or simply give up for example
via checking for abnormal SSA call arguments in an appropriate place.
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Subject: [Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Mon, 09 May 2016 12:11:00 -0000
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--- Comment #3 from Tavian Barnes <tavianator at gmail dot com> ---
Because their long_t is not POD. I don't know why that is though. It could be
POD if they removed the default/copy constructors and assignment operator.
Actually they're probably worried about custom allocators where the pointer
type is not POD. So it couldn't be POD in general, and thus can't appear in a
union directly (in C++03).
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/68945] enable libcilkrts on SPARC
Date: Mon, 09 May 2016 12:14:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #38221|0 |1
is obsolete| |
Attachment #38413|0 |1
is obsolete| |
--- Comment #10 from Rainer Orth <ro at gcc dot gnu.org> ---
Created attachment 38451
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38451&action=edit
Revised patch
Here's a version of the patch that is, I believe, ready for upstream
submission.
It's based on the upstream version as has just been merged into the gcc repo.
Compared to the previous sparcv9 support, the assertions are gone to allow for
an easier read.
I've also replaced the times(3C) based implementation of __cilkrts_getticks by
one reading %tick directly, which should work on all UltraSPARC CPUs,
independent
of O/S.
I've replaced the _GNU_SOURCE guard around runtime/sysdep-unix.c
(get_runtime_path) around the use dladdr
by the result of a configure check. The previous version had been wrong (just
defining _GNU_SOURCE) doesn't suddently materialize dladdr), and the function
is present in Solaris libc.
Perhaps Eric could have a look at the SPARC assembler code to double-check that
I got it right:
* In runtime/config/sparc/os-unix-sysdep.c (__cilkrts_getticks) I needed
different
32- and 64-bit versions. I tested the result in standalone program which
just
printed the result.
* One thing I wonder about is runtime/config/sparc/os-fence.h: when using
__sync_synchronize, gcc emits membar #StoreLoad, while Stefan's patch had
membar #LoadLoad | #LoadStore | #StoreStore | #StoreLoad. It seems that
all but #StoreLoad are no-ops for TSO SPARC CPUs, but I'd better get this
right.
I also believe that only so little of Stefan's code is left
(__cilkrts_short_pause mostly) to not require a separate assignement for
upstream submission. If I'm mistaken, we'd better get that ball rolling.
Rainer
>From gcc-bugs-return-524575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 12:20:54 2016
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Subject: [Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Mon, 09 May 2016 12:20:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 9 May 2016, tavianator at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71002
>
> --- Comment #3 from Tavian Barnes <tavianator at gmail dot com> ---
> Because their long_t is not POD. I don't know why that is though. It could be
> POD if they removed the default/copy constructors and assignment operator.
>
> Actually they're probably worried about custom allocators where the pointer
> type is not POD. So it couldn't be POD in general, and thus can't appear in a
> union directly (in C++03).
But if it is not POD then assuming it gets copied correctly when
init-constructing a POD union where they placed such object is
an interesting assumption...
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Subject: [Bug tree-optimization/70985] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: verify_gimple failed
Date: Mon, 09 May 2016 12:23:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon May 9 12:23:11 2016
New Revision: 236032
URL: https://gcc.gnu.org/viewcvs?rev=236032&root=gcc&view=rev
Log:
2016-05-09 Richard Biener <rguenther@suse.de>
PR tree-optimization/70985
* match.pd (BIT_FIELD_REF -> (type)): Disable on GIMPLE when
op0 isn't a gimple register.
* gcc.dg/torture/pr70985.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70985.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/70985] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: verify_gimple failed
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug ipa/70785] LTO bootstrap with IPA PTA is broken
Date: Mon, 09 May 2016 12:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |riad93 at mail dot ru
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 71018 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-524579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 12:34:59 2016
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Subject: [Bug lto/71018] lto + ipa-pta causes exception with trivial boost::ptime code.
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
The patch for PR70785 fixed this, thus fixed for GCC 6.2.
*** This bug has been marked as a duplicate of bug 70785 ***
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Subject: [Bug testsuite/70826] [7 regression] many test cases fail starting with r235442
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--- Comment #10 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Mon May 9 12:35:25 2016
New Revision: 236033
URL: https://gcc.gnu.org/viewcvs?rev=236033&root=gcc&view=rev
Log:
[RS6000] Fragile testcase breaks with -frename-registers
PR testsuite/70826
* gcc.target/powerpc/savres.c: Compile with -fno-rename-registers.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/powerpc/savres.c
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Alan Modra <amodra at gmail dot com> changed:
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----------------------------------------------------------------------------
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|amodra at gmail dot com |
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--- Comment #11 from Alan Modra <amodra at gmail dot com> ---
Fixed, until it breaks next time.
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Subject: [Bug testsuite/71021] New: [libatomic testsuite] Test program compilation fail (missing -pthread flag)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71021
Bug ID: 71021
Summary: [libatomic testsuite] Test program compilation fail
(missing -pthread flag)
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
Reporter: romain.geissler at amadeus dot com
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Created attachment 38452
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38452&action=edit
Add "-pthread" flag when compiling libatomic test programs
Hi,
I am currently building up the Amadeus toolchain and I have trouble running the
testsuite with libatomic. All test fails because the compilation of the test
program fails. This happens in the specific case of our own toolchain because
we build and install glibc/binutils/gcc in a custom prefix
"/opt/1A/toolchain/x86_64-2.6.32-v2-6/". It also fails since the default system
glibc (found in /lib) is different from the Amadeus toolchain glibc against
which we link both binutils and glibc. The toolchain glibc is glibc 2.23 while
the system glibc is glibc
This happens on Linux x86_64, using gcc 4.9.4. I haven't checked yet if it also
happens with gcc 6 but I will check soon.
When I run:
make check-target-libatomic RUNTESTFLAGS="c.exp=atomic-compare-exchange-1.c -v
-v"
I can see:
Executing on host: /workdir/build/final-system/gcc-build/gcc/xgcc
-B/workdir/build/final-system/gcc-build/gcc/
/workdir/src/gcc-4.9.4/libatomic/testsuite/libatomic.c/atomic-compare-exchange-1.c
-B/workdir/build/final-system/gcc-build/x86_64-1a-linux-gnu/./libatomic/
-I/workdir/build/final-system/gcc-build/x86_64-1a-linux-gnu/./libatomic
-I/workdir/src/gcc-4.9.4/libatomic/testsuite/.. -fmessage-length=0
-fno-inline-atomics -g
-L/workdir/build/final-system/gcc-build/x86_64-1a-linux-gnu/./libatomic/.libs
-latomic -lm -o ./atomic-compare-exchange-1.exe (timeout = 300)
pid is 23832 -23832
waitres is 23832 exp8 0 1
close result is 23832 exp8 0 1
output is /lib/x86_64-linux-gnu/libpthread.so.0: undefined reference to
`h_errno@GLIBC_PRIVATE'
collect2: error: ld returned 1 exit status
If I manually run the link phase with "-Wl,-v,-t" I have this:
/workdir/build/final-system/gcc-build/gcc/collect-ld -plugin
/workdir/build/final-system/gcc-build/gcc/liblto_plugin.so
-plugin-opt=/workdir/build/final-system/gcc-build/gcc/lto-wrapper
-plugin-opt=-fresolution=/tmp/ccSu6fuN.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --build-id
--eh-frame-hdr --hash-style=gnu -m elf_x86_64 -dynamic-linker
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib64/ld-linux-x86-64.so.2 -o
./atomic-compare-exchange-1.exe
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/../lib64/crt1.o
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/../lib64/crti.o
/workdir/build/final-system/gcc-build/gcc/crtbegin.o
-L/workdir/build/final-system/gcc-build/x86_64-1a-linux-gnu/./libatomic/.libs
-L/workdir/build/final-system/gcc-build/gcc
-L/workdir/build/final-system/gcc-build/x86_64-1a-linux-gnu/./libatomic
-L/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/../lib64
-L/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib /tmp/cccwFSDA.o -latomic -lm -v -t
-lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s
--no-as-needed /workdir/build/final-system/gcc-build/gcc/crtend.o
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/../lib64/crtn.o
GNU ld (GNU Binutils) 2.26.0.20160501
/opt/1A/toolchain/x86_64-2.6.32-v2-6/x86_64-1a-linux-gnu/bin/ld: mode
elf_x86_64
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/../lib64/crt1.o
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/../lib64/crti.o
/workdir/build/final-system/gcc-build/gcc/crtbegin.o
/tmp/cccwFSDA.o
-latomic
(/workdir/build/final-system/gcc-build/x86_64-1a-linux-gnu/./libatomic/.libs/libatomic.so)
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/libm.so.6/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/libmvec.so.1
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/libmvec.so.1
-lgcc_s (/workdir/build/final-system/gcc-build/gcc/libgcc_s.so)
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/libc.so.6
(/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/libc_nonshared.a)elf-init.oS
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/ld-linux-x86-64.so.2
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/ld-linux-x86-64.so.2
-lgcc_s (/workdir/build/final-system/gcc-build/gcc/libgcc_s.so)
/workdir/build/final-system/gcc-build/gcc/crtend.o
/opt/1A/toolchain/x86_64-2.6.32-v2-6/lib/../lib64/crtn.o
/lib/x86_64-linux-gnu/libpthread.so.0: undefined reference to
`h_errno@GLIBC_PRIVATE'
/opt/1A/toolchain/x86_64-2.6.32-v2-6/x86_64-1a-linux-gnu/bin/ld: link errors
found, deleting executable `./atomic-compare-exchange-1.exe'
collect2: error: ld returned 1 exit status
So it clearly shows there is a conflict between the glibc in
/opt/1A/toolchain/x86_64-2.6.32-v2-6/ and the one in /lib. The linker uses by
default the one in /lib because libatomic depends on libpthread, but the test
binary was *NOT* built with either "-pthread" or "-lpthread" while it should.
This is an issue inside the libatomic test framework. I have fixed it using the
attached patch (by adding "-pthread" to "ALWAYS_CFLAGS" in
"libatomic/testsuite/lib/libatomic.exp". However I am not sure this patch is
correct for all different target that gcc is compatible with.
Cheers,
Romain
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Subject: [Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Mon, 09 May 2016 13:08:00 -0000
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--- Comment #5 from Tavian Barnes <tavianator at gmail dot com> ---
> But if it is not POD then assuming it gets copied correctly when
> init-constructing a POD union where they placed such object is
> an interesting assumption...
Hrm? They seem to always copy it manually with long_t's copy constructor:
::new(&m_repr.long_repr()) long_t(other.m_repr.long_repr());
>From gcc-bugs-return-524584-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 13:32:03 2016
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Subject: [Bug lto/70955] [6/7 Regression] Wrong code generation for __builtin_ms_va_list with -flto
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vries at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |vries at gcc dot gnu.org
--- Comment #8 from vries at gcc dot gnu.org ---
Created attachment 38453
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38453&action=edit
tentative patch
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Subject: [Bug testsuite/71021] [libatomic testsuite] Test program compilation fail (missing -pthread flag)
Date: Mon, 09 May 2016 13:32:00 -0000
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--- Comment #1 from nsz at gcc dot gnu.org ---
i think target lib tests are broken in gcc (other than libstdc++ and
libgfortran).
if the build-sysroot paths were used then the right libc would be linked.
but CC (with all the necessary flags) is not passed from make to the test
system, instead dejagnu find_gcc is used and some heuristics to reconstruct the
-B etc flags, and thus the build sysroot is missing. (e.g. getenv CC instead of
find_gcc would be a correct fix in libatomic.exp.. +export CC in the makefile).
others seem to have run into this too, but apparently it was not fixed:
https://gcc.gnu.org/ml/gcc-patches/2013-05/msg01181.html
(the libstdc++ solution is also less than elegant: it generates a shell script
that knows the paths/flags and call that repeatedly from the dejagnu tcl code..
instead of just passing the envvars from make to runtest)
all target libs with tests need this fix when --with-build-sysroot is used.
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Subject: [Bug rtl-optimization/71022] New: GCC prefers register moves over move immediate
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Bug ID: 71022
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When assigning the same immediate value to different registers, GCC will always
CSE the immediate and emit a register move for subsequent uses. This creates
unnecessary register dependencies and increases latency. When the cost of an
immediate move is the same as a register move (which should be true for most
targets), it should prefer the former. A register move is better only when the
immediate requires multiple instructions or is larger with -Os.
It's not obvious where this is best done. The various cprop phases before IRA
do the right thing, but cse2 (which runs later) then undoes it. And
cprop_hardreg doesn't appear to be able to deal with immediates.
int f1(int x)
{
int y = 1, z = 1;
while (x--)
{
y += z;
z += x;
}
return y + z;
}
void g(float, float);
void f2(void) { g(1.0, 1.0); g(3.3, 3.3); }
On AArch64 I get:
f1:
sub w1, w0, #1
cbz w0, .L12
mov w0, 1
mov w2, w0 *** mov w2, 1
.p2align 2
.L11:
add w2, w2, w0
add w0, w0, w1
sub w1, w1, #1
cmn w1, #1
bne .L11
add w0, w2, w0
ret
.L12:
mov w0, 2
ret
f2:
fmov s1, 1.0e+0
str x30, [sp, -16]!
fmov s0, s1 *** fmov s0, 1.0
bl g
adrp x0, .LC1
ldr x30, [sp], 16
ldr s1, [x0, #:lo12:.LC1]
fmov s0, s1 *** ldr s0, [x0, #:lo12:.LC1]
b g
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Subject: [Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
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--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 9 May 2016, tavianator at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71002
>
> --- Comment #5 from Tavian Barnes <tavianator at gmail dot com> ---
> > But if it is not POD then assuming it gets copied correctly when
> > init-constructing a POD union where they placed such object is
> > an interesting assumption...
>
> Hrm? They seem to always copy it manually with long_t's copy constructor:
>
> ::new(&m_repr.long_repr()) long_t(other.m_repr.long_repr());
I stand corrected. At least they always read from short_t when
computing is_short() even if that is not the active union member.
Some missed optimizations:
foo::foo(string) (struct foo * const this, struct string & restrict str)
{
...
<bb 2>:
MEM[(struct short_t &)this_2(D)].h.is_short = 1;
MEM[(struct short_t &)this_2(D)].h.length = 0;
MEM[(struct short_t &)this_2(D)].data[0] = 0;
_19 = BIT_FIELD_REF <MEM[(const struct string *)this_2(D)], 8, 0>;
_20 = _19 & 1;
if (_20 != 0)
this is fold-const.c at work replacing the load from h.is_short
with the BIT_FIELD_REF.
But then we go to
short_t short_backup(m_repr.short_repr());
m_repr.short_repr().~short_t();
::new(&m_repr.long_repr()) long_t(other.m_repr.long_repr());
other.m_repr.long_repr().~long_t();
::new(&other.m_repr.short_repr()) short_t(short_backup);
<bb 5>:
short_backup = MEM[(const struct short_t &)this_2(D)];
MEM[(struct long_t *)this_2(D)] = MEM[(const struct long_t *)str_5(D)];
MEM[(struct short_t *)str_5(D)] = short_backup;
short_backup ={v} {CLOBBER};
goto <bb 11>;
which looks good. But
<bb 11>:
# prephitmp_52 = PHI <_51(10), 0(5)>
goto <bb 13>;
<bb 13>:
# iftmp.7_13 = PHI <prephitmp_52(11), _12(12)>
*this_2(D).m_len = iftmp.7_13;
stores zero into the length field. Somehow PRE does this transform.
I'll investigate some more.
>From gcc-bugs-return-524588-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 13:44:48 2016
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From: "mrestelli at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/71023] New: Problem with associate and function returning derived type
Date: Mon, 09 May 2016 13:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71023
Bug ID: 71023
Summary: Problem with associate and function returning derived
type
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: mrestelli at gmail dot com
Target Milestone: ---
gfortran does not compile the following valid code:
module m
implicit none
type :: t
integer :: i
end type t
contains
pure function make_a_t(i) result(at)
integer, intent(in) :: i
type(t) :: at
at%i = i
end function make_a_t
subroutine s()
associate( my_t => make_a_t(5) )
write(*,*) my_t%i
end associate
end subroutine s
end module m
$ gfortran -c asb.f90 -o asb.o
asb.f90:20:18:
write(*,*) my_t%i
1
Error: Symbol »my_t« at (1) has no IMPLICIT type
$ gfortran --version
GNU Fortran (GCC) 7.0.0 20160422 (experimental)
>From gcc-bugs-return-524589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 13:58:42 2016
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Subject: [Bug c++/71024] New: Missing warning for contradictory attributes
Date: Mon, 09 May 2016 13:58:00 -0000
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Bug ID: 71024
Summary: Missing warning for contradictory attributes
Product: gcc
Version: 7.0
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Observe that on
void __attribute ((always_inline)) foo (void);
void __attribute ((noinline)) foo (void);
$ ./cc1 -quiet q.cc
q.cc:2:31: warning: declaration of ‘foo’ with attribute ‘noinline’ follows
declaration with attribute ‘always_inline’ [-Wattributes]
void __attribute ((noinline)) foo (void);
^~~
q.cc:1:36: note: previous declaration of ‘foo’ was here
void __attribute ((always_inline)) foo (void);
^~~
but cc1plus is silent. I think we need to factor out some code out of
diagnose_mismatched_decls.
>From gcc-bugs-return-524590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:13:42 2016
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Subject: [Bug libstdc++/71004] recursive_directory_iterator does not have a user-provided default ctor
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--- Comment #6 from Eric Fiselier <eric at efcs dot ca> ---
(In reply to Jonathan Wakely from comment #4)
> (In reply to Eric Fiselier from comment #1)
> > recursive_directory_iterator it;
> > assert(it.recursion_pending() == false);
> > assert(it.recursion_pending() == true);
>
> N.B. This test is undefined, those observer functions have preconditions
> that they are not called on the end iterator.
That's true, my mistake.
>From gcc-bugs-return-524591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:16:27 2016
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Subject: [Bug libstdc++/71025] New: std::call_once aborts instead of propagating an exception (AIX 6.1)
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Bug ID: 71025
Summary: std::call_once aborts instead of propagating an
exception (AIX 6.1)
Product: gcc
Version: 5.3.0
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When an exception is thrown inside a function called from std::call_once, the
process is aborted. The exception should be propagated outside std::call_once.
#include <stdio.h>
#include <mutex>
#include <stdexcept>
int main()
{
static std::once_flag flag;
printf( "start\n" );
try
{
std::call_once(
flag,
[&]()
{
throw std::runtime_error("thrown from once");
} );
}
catch ( std::runtime_error const& exc )
{
printf( "%s\n", exc.what() );
}
printf( "end\n" );
return 0;
}
bea@stbldap02:~/samples$ g++ -std=c++14 -pthread std_call_once_exception.cxx
bea@stbldap02:~/samples$ ./a.out
start
terminate called after throwing an instance of 'std::runtime_error'
what(): thrown from once
IOT/Abort trap (core dumped)
BTW: the system on which I tested it should be the same as in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67478
>From gcc-bugs-return-524592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:22:37 2016
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Subject: [Bug fortran/71023] Problem with associate and function returning derived type
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I think it is a duplicate of pr60483.
*** This bug has been marked as a duplicate of bug 60483 ***
>From gcc-bugs-return-524593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:22:37 2016
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Subject: [Bug fortran/60483] [4.9/5/6/7 Regression] No IMPLICIT type error with: ASSOCIATE( X => derived_type() ) [i.e. w/ structure constructor]
Date: Mon, 09 May 2016 14:22:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mrestelli at gmail dot com
--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 71023 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-524594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:25:31 2016
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Subject: [Bug target/70957] testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on power7
Date: Mon, 09 May 2016 14:25:00 -0000
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|NEW |UNCONFIRMED
Ever confirmed|1 |0
--- Comment #7 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
I can no longer reproduce this with a bootstrap compiler, even on the revision
where it failed for me before. I'm perplexed. Do you still see it failing?
>From gcc-bugs-return-524595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:27:00 2016
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Subject: [Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
So PRE sees:
<bb 2>:
# .MEM_3 = VDEF <.MEM_1(D)>
MEM[(struct &)this_2(D)] ={v} {CLOBBER};
# .MEM_14 = VDEF <.MEM_3>
MEM[(struct &)this_2(D)] ={v} {CLOBBER};
# .MEM_15 = VDEF <.MEM_14>
MEM[(struct short_t &)this_2(D)].h.is_short = 1;
# .MEM_16 = VDEF <.MEM_15>
MEM[(struct short_t &)this_2(D)].h.length = 0;
# .MEM_17 = VDEF <.MEM_16>
MEM[(struct short_t &)this_2(D)].data[0] = 0;
# VUSE <.MEM_17>
_19 = BIT_FIELD_REF <MEM[(const struct string *)this_2(D)], 8, 0>;
_20 = _19 & 1;
if (_20 != 0)
goto <bb 3>;
else
goto <bb 6>;
<bb 3>:
# VUSE <.MEM_17>
_21 = BIT_FIELD_REF <MEM[(const struct string *)str_5(D)], 8, 0>;
_22 = _21 & 1;
if (_22 != 0)
goto <bb 4>;
else
goto <bb 5>;
<bb 5>:
# .MEM_34 = VDEF <.MEM_17>
short_backup = MEM[(const struct short_t &)this_2(D)];
# .MEM_35 = VDEF <.MEM_34>
MEM[(struct long_t *)this_2(D)] = MEM[(const struct long_t *)str_5(D)];
# .MEM_36 = VDEF <.MEM_35>
MEM[(struct short_t *)str_5(D)] = short_backup;
# .MEM_37 = VDEF <.MEM_36>
short_backup ={v} {CLOBBER};
goto <bb 10>;
<bb 10>:
# .MEM_29 = PHI <.MEM_33(13), .MEM_37(5)>
# VUSE <.MEM_29>
_9 = MEM[(const struct short_t &)this_2(D)].h.length;
_10 = (long unsigned int) _9;
goto <bb 12>;
and it concludes that on the path bb2 -> bb5 -> bb10 nothing can clobber
MEM[(const struct short_t &)this_2(D)].h.length and thus it is safe to
replace it with zero (from the init in bb2). The "obvious" clobbering
candidate is
# .MEM_35 = VDEF <.MEM_34>
MEM[(struct long_t *)this_2(D)] = MEM[(const struct long_t *)str_5(D)];
but that is storing using a different type. So the error must happen earlier.
It might be as early as the BIT_FIELD_REF folding of the is_short read which
does
_19 = BIT_FIELD_REF <MEM[(const struct string *)_4], 8, 0>;
It is DOM who threads further reads from the above again not considering
the above store clobbering a read via 'struct string' (which does not
include long_t in its alias subsets).
Thus mine (to fix optimize_bit_field_compare).
>From gcc-bugs-return-524596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:28:45 2016
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Subject: [Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Mon, 09 May 2016 14:28:00 -0000
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--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note that ultimatively the error is still that is_short () accesses the wrong
union member.
I'll still see whether there is a bug in optimize_bit_field_compare.
>From gcc-bugs-return-524597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:30:38 2016
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Subject: [Bug target/70957] testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on power7
Date: Mon, 09 May 2016 14:30:00 -0000
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--- Comment #8 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Looks like it also did not fail in the latest gcc-testresults Power7 BE run.
Going to stop looking at this unless/until it shows up again.
>From gcc-bugs-return-524598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:38:54 2016
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Subject: [Bug libstdc++/71025] std::call_once aborts instead of propagating an exception (AIX 6.1)
Date: Mon, 09 May 2016 14:38:00 -0000
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--- Comment #1 from Vojtech Fried <vfried at opentext dot com> ---
I am sorry, probably duplicate of
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66146
>From gcc-bugs-return-524600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:42:29 2016
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Subject: [Bug fortran/52162] Bogus -fcheck=bounds with realloc on assignment to unallocated LHS
Date: Mon, 09 May 2016 14:42:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
CC| |mrestelli at gmail dot com
--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
*** Bug 70953 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-524599-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:42:29 2016
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Subject: [Bug fortran/70953] Reallocation on assignment does not work with debug flags
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> It looks like a duplicate of pr52162 (see comment 2).
Not challenged, marked as duplicate of pr52162.
*** This bug has been marked as a duplicate of bug 52162 ***
>From gcc-bugs-return-524601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:48:42 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/71014] associate statement inside omp parallel do appears to disable default private attribute for inner loop indices
Date: Mon, 09 May 2016 14:48:00 -0000
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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> ---
WORKSFORME on x86_64-apple-darwin15 from 4.9.3 up to trunk (7.0). With 4.8.5 I
get
pr71014.f90:19:0: internal compiler error: in omp_add_variable, at
gimplify.c:5896
associate (jassoc => j)
Could you please post the result of 'gfortran -v'?
>From gcc-bugs-return-524602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 14:55:13 2016
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Subject: [Bug fortran/56226] Add support for DEC UNION and MAP extensions
Date: Mon, 09 May 2016 14:55:00 -0000
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--- Comment #29 from Fritz Reese <fritzoreese at gmail dot com> ---
(In reply to Andreas Schwab from comment #25)
> FAIL: gfortran.dg/dec_union_4.f90 -O0 execution test
> FAIL: gfortran.dg/dec_union_4.f90 -O1 execution test
> FAIL: gfortran.dg/dec_union_4.f90 -O2 execution test
> FAIL: gfortran.dg/dec_union_4.f90 -O3 -fomit-frame-pointer -funroll-loops
> -fpeel-loops -ftracer -finline-functions execution test
> FAIL: gfortran.dg/dec_union_4.f90 -O3 -g execution test
> FAIL: gfortran.dg/dec_union_4.f90 -Os execution test
It was silly of me to disregard endian-ness in this test case. Fixed:
https://gcc.gnu.org/ml/fortran/2016-05/msg00018.html
>From gcc-bugs-return-524603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 15:06:30 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/69699] libstdc++ ABI documentation is out of date
Date: Mon, 09 May 2016 15:06:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
There is no such macro.
>From gcc-bugs-return-524604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 15:20:54 2016
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Subject: [Bug lto/70955] [6/7 Regression] Wrong code generation for __builtin_ms_va_list with -flto
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Domani Hannes <ssbssa at yahoo dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ssbssa at yahoo dot de
--- Comment #9 from Domani Hannes <ssbssa at yahoo dot de> ---
I've the same behavior on windows as well, even if I remove the ms_abi
attribute (probably because it's always ms_abi anyway?).
>From gcc-bugs-return-524605-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 15:31:16 2016
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Subject: [Bug fortran/71014] associate statement inside omp parallel do appears to disable default private attribute for inner loop indices
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--- Comment #2 from Keith Lindsay <klindsay at ucar dot edu> ---
Created attachment 38454
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38454&action=edit
output from gfortran -v
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--- Comment #3 from Keith Lindsay <klindsay at ucar dot edu> ---
Created attachment 38455
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38455&action=edit
output from gfortran -v
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Subject: [Bug fortran/71014] associate statement inside omp parallel do appears to disable default private attribute for inner loop indices
Date: Mon, 09 May 2016 15:32:00 -0000
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--- Comment #4 from Keith Lindsay <klindsay at ucar dot edu> ---
Thanks for taking a look. I've attached the output from the command
gfortran -v -fopenmp openmp_nested_loops.f90 -o openmp_nested_loops
on two different systems where I'm seeing the problem.
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Subject: [Bug target/70894] ICE when using neon intrinsic with mabi=apcs-gnu
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-09
Ever confirmed|0 |1
Known to fail| |7.0
--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Confirmed on trunk. Note that I don't expect that we ever intended to make
ACLE extensions work with the old ABI (-mabi=apcs-gnu). Nevertheless, we
shouldn't ICE.
>From gcc-bugs-return-524609-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 16:08:29 2016
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Subject: [Bug tree-optimization/71026] New: Missing division optimizations
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Bug ID: 71026
Summary: Missing division optimizations
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With -Ofast GCC doesn't reassociate constant multiplies or negates away from
divisors to allow for more reciprocal division optimizations. It is also
possible to avoid divisions (or multiplies) involving immediates in comparisons
that check for a positive/negative result.
float f1(float x, float y) { return x / (y * y); } // -> x * (1/y) * (1/y)
float f2(float x, float y) { return x / (y * 3.0f); } // -> (x/3) / y
float f3(float x, float y) { return x / -y; } // -> (-x) / y
int f4(float x) { return (1.0f / x) < 0.0f; } // -> x < 0.0f
int f5(float x) { return (x / 2.0f) <= 0.0f; } // -> x <= 0.0f
A quick experiment shows the first transformation could remove almost 100
divisions from SPEC2006, the 2nd 50. The first transformation is only useful if
there is at least one other division by y, so likely best done in the division
reciprocal optimization phase.
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Subject: [Bug target/70904] ICE: Max. number of generated reload insns per insn is achieved (90) with -fno-split-wide-types @ aarch64
Date: Mon, 09 May 2016 16:11:00 -0000
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Jiong Wang <jiwang at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vmakarov at redhat dot com
--- Comment #2 from Jiong Wang <jiwang at gcc dot gnu.org> ---
(In reply to Zdenek Sojka from comment #0)
> Created attachment 38393 [details]
> reduced testcase
>
> Compiler output:
> $ aarch64-unknown-linux-gnu-gcc -O -fno-split-wide-types testcase.c
> testcase.c: In function 'foo':
> testcase.c:8:1: internal compiler error: Max. number of generated reload
> insns per insn is achieved (90)
>
> }
> ^
> 0x9dafa9 lra_constraints(bool)
> /repo/gcc-trunk/gcc/lra-constraints.c:4440
> 0x9c63dc lra(_IO_FILE*)
> /repo/gcc-trunk/gcc/lra.c:2290
> 0x96de19 do_reload
> /repo/gcc-trunk/gcc/ira.c:5425
> 0x96de19 execute
> /repo/gcc-trunk/gcc/ira.c:5609
From rtl dump, reload is trying to insert the following reload insn
r93:OI = r80:OI
r93 is with general register class and r80 is with vector register
class. r93 was created to meet the constraint inside insn 17, and was to
replace the vector register r80 inside the subreg, as vector register
can't be used as index register.
(insn 17 11 20 2 (set (mem:SI (plus:DI (sign_extract:DI (mult:DI (subreg:DI
(reg:OI 80 [ D.2754 ]) 0)
(const_int 4 [0x4]))
(const_int 34 [0x22])
(const_int 0 [0]))
(reg/f:DI 83)) [1 *_9+0 S4 A32])
(const_int 0 [0])) bug-1.c:7 49 {*movsi_aarch64}
reload here is trying to reload the inner register r80 instead of the whole
subreg,
thus creating a new "OImode (vector register)" to "OImode (general register"
move
which can't be supported in hardware and caused further endless reload.
For mode with size bigger than word_mode, there won't be "mov" between
two registers with different classes, but there normally will be "mov"
which transfers element of vector register into the general register, and
this normally will be a subreg.
So I think we should teach reload about this to reload the whole subreg
if above conditions met.
Comments?
(CCed RA maintainer Vlad)
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
index 14d5f1d..0ca7a7d 100644
--- a/gcc/lra-constraints.c
+++ b/gcc/lra-constraints.c
@@ -1307,7 +1307,15 @@ process_addr_reg (rtx *loc, bool check_only_p, rtx_insn
**before, rtx_insn **aft
subreg_p = GET_CODE (*loc) == SUBREG;
if (subreg_p)
- loc = &SUBREG_REG (*loc);
+ {
+ reg = SUBREG_REG (*loc);
+ mode = GET_MODE (reg);
+
+ if (in_class_p (reg, cl, &new_class)
+ || GET_MODE_SIZE (mode) <= GET_MODE_SIZE (word_mode))
+ loc = &SUBREG_REG (*loc);
+ }
+
reg = *loc;
mode = GET_MODE (reg);
if (! REG_P (reg))
>From gcc-bugs-return-524611-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 16:53:09 2016
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From: "zenith432 at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/70955] [6/7 Regression] Wrong code generation for __builtin_ms_va_list with -flto
Date: Mon, 09 May 2016 16:53:00 -0000
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--- Comment #10 from zenith432 at users dot sourceforge.net ---
(In reply to vries from comment #8)
> Created attachment 38453 [details]
> tentative patch
vries, thank you very much. I verified and looks good.
Built GCC 6.1.0 with patch from released sources on ftp.gnu.org.
[moved the patch to the right place of course]
Built a fairly large UEFI-based project with a good number of ms_va_list.
Checked the disassembly manually for 1 instance. Code is right + tested it to
run ok in various scenarios I know to use __builtin_va_arg.
Bug can be changed to resolved as far as I'm concerned. Not sure whether it
has to wait for commit, so leaving it to TPTB.
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Subject: [Bug c++/71010] error: 'begin' was not declared in this scope
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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CC| |manu at gcc dot gnu.org
--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #1)
Furthermore, your code has undefined behaviour, it is forbidden to add your
> own functions to namespace std. The correct way to do it is to write the
> begin/end overloads in the same namespace as your type (in this case that's
> the global namespace).
I actually did not know that. Would it be possible to warn about this? I guess
libstdc++ files are system-headers and can avoid the warning.
>From gcc-bugs-return-524613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 18:06:02 2016
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Subject: [Bug fortran/71027] New: -fsanitizedress catches out of bounds access on assumed size array only with -O0
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Bug ID: 71027
Summary: -fsanitize=address catches out of bounds access on
assumed size array only with -O0
Product: gcc
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! -fsanitize=address -O0 catches out of bounds access on assumed size array
! any other optimization level, even -Og, inhibits catching
dimension v(10)
call sub(v)
contains
subroutine sub(vv)
dimension vv(*)
x=vv(20) ! out of bounds access
end subroutine
end
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Subject: [Bug lto/70955] [6/7 Regression] Wrong code generation for __builtin_ms_va_list with -flto
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--- Comment #11 from Domani Hannes <ssbssa at yahoo dot de> ---
I can confirm that this patch works for windows as well.
>From gcc-bugs-return-524615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 18:09:00 2016
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Subject: [Bug middle-end/71028] New: [7 regression] ICE in redirect_jump, at jump.c:1560
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Bug ID: 71028
Summary: [7 regression] ICE in redirect_jump, at jump.c:1560
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gcc.c-torture/compile/pr37483.c and
gcc.dg/20010822-1.c
FAILs on arm-none-eabi with:
...: internal compiler error: in redirect_jump, at jump.c:1560
}
^
0x98314d redirect_jump(rtx_jump_insn*, rtx_def*, int)
../../gcc/gcc/jump.c:1560
0x10b8276 try_optimize_cfg
../../gcc/gcc/cfgcleanup.c:2900
0x10b8276 cleanup_cfg(int)
../../gcc/gcc/cfgcleanup.c:3150
0x10b9646 execute
../../gcc/gcc/cfgcleanup.c:3279
The following commit seem to cause it:
https://gcc.gnu.org/viewcvs?rev=235904&root=gcc&view=rev
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Subject: [Bug fortran/71014] associate statement inside omp parallel do appears to disable default private attribute for inner loop indices
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Harald Anlauf <anlauf at gmx dot de> changed:
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--- Comment #5 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Keith Lindsay from comment #4)
> Thanks for taking a look. I've attached the output from the command
> gfortran -v -fopenmp openmp_nested_loops.f90 -o openmp_nested_loops
> on two different systems where I'm seeing the problem.
Do you still see the problem when you replace the line
!$OMP PARALLEL DO
by
!$OMP PARALLEL DO private(i,j) shared(s) default(none)
?
What you see might be a race condition, since you did not declare the
inner loop variable i as private.
>From gcc-bugs-return-524617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 18:31:41 2016
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Subject: [Bug libstdc++/71025] std::call_once aborts instead of propagating an exception (AIX 6.1)
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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> ---
Yes this is PR 66146
*** This bug has been marked as a duplicate of bug 66146 ***
>From gcc-bugs-return-524618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 18:31:42 2016
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Subject: [Bug libstdc++/66146] call_once not C++11-compliant on ppc64le
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--- Comment #18 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 71025 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-524619-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 18:33:05 2016
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From: "alisdairm at me dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/71029] New: large fold expressions compile slowly with -Wall
Date: Mon, 09 May 2016 18:33:00 -0000
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Bug ID: 71029
Summary: large fold expressions compile slowly with -Wall
Product: gcc
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Created attachment 38456
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38456&action=edit
file is very slow compiled with Wall
The attached file uses a simple fold expression over a comma operator to
consume 'get<N>' on each element of a std::array<int, 2048>, so essentially
2047 comma operators separating empty 'sink' function calls.
On my current machine, with just with just g++ -std=c++1z file.cpp, this takes
around 2.5 seconds to compile. With g++ -std=c++1z -Wall file.cpp it takes 25
seconds, and still reports no warnings.
The generated code is also quite large, regardless of warning setting,
generating an executable of around 650k. This is less than 5k when compiled
-O3.
Running the same scenario through Clang, the unoptimized code produced s 90k
executable, and consistently gives a 1.5 second compile time, regardless of
warning level.
I suspect that Clang is getting in an early optimization around the do-nothing
function to eliminate a lot of code prior to running warning passes, but that
is entirely speculation as I have no idea how either compiler is implemented ;)
For the curious, compiling with the latest gcc 7 branch available through
MacPorts, this takes around 60% longer again although I am not sure if that
compiler is built with the same optimization settings as the released gcc 6.1
compiler.
>From gcc-bugs-return-524620-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 18:33:32 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/71027] -fsanitizedress catches out of bounds access on assumed size array only with -O0
Date: Mon, 09 May 2016 18:33:00 -0000
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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> ---
IMO your expectation is invalid:
[Book15] f90/bug% gfc pr71027.f90 -Og -fdump-tree-optimized
[Book15] f90/bug% cat pr71027.f90.211t.optimized
;; Function main (main, funcdef_no=2, decl_uid=3429, cgraph_uid=2,
symbol_order=2) (executed once)
__attribute__((externally_visible))
main (integer(kind=4) argc, character(kind=1) * * argv)
{
static integer(kind=4) options.0[9] = {68, 1023, 0, 0, 1, 1, 0, 0, 31};
<bb 2>:
_gfortran_set_args (argc_2(D), argv_3(D));
_gfortran_set_options (9, &options.0[0]);
return 0;
}
i.e., the subroutine sub is optimized away. If you do something such as
subroutine sub(vv)
dimension vv(*)
x=vv(20) ! out of bounds access
vv(1)=x
end subroutine
then -fsanitize=address catches the invalid address.
>From gcc-bugs-return-524621-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 18:40:08 2016
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Subject: [Bug middle-end/71028] [7 regression] ICE in redirect_jump, at jump.c:1560
Date: Mon, 09 May 2016 18:40:00 -0000
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-09
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--- Comment #1 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Confirmed (with arm-linux-gnueabi, -O2 to reproduce). Mine.
>From gcc-bugs-return-524622-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 18:49:38 2016
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Subject: [Bug c/71030] New: Strange segmentation fault
Date: Mon, 09 May 2016 18:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71030
Bug ID: 71030
Summary: Strange segmentation fault
Product: gcc
Version: 6.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
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Created attachment 38457
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38457&action=edit
preprocessed file
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/6.1.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc-multilib/src/gcc/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release
Thread model: posix
gcc version 6.1.1 20160501 (GCC)
Used makefile
CC=gcc
CFLAGS= -Wall -m32
all: main.o f.o
$(CC) $(CFLAGS) main.o f.o -o fun
main.o: main.c
$(CC) $(CFLAGS) -c main.c -o main.o
f.o: f.s
nasm -f elf -g f.s -o f.o
make && ./fun 2 2
Program runs intel x86 assembly function in main. Use of the EBX register
inside that function causes segmentation fault (after return from function).
It seems like gcc is using EBX instead of EBP before function call.
Program compiled using clang works properly.
Bug was noticed firstly on gcc 5.3.0 version, but is still present on latest
repository version.
main.c file :
#include "f.h" // only void f(int); + guardian
int main()
{
int var = 4;
f(var);
return 0;
}
f.s file :
section .text
global f
f:
push ebp
mov ebp, esp
mov eax, [ebp+8]
mov ebx, 0
begin:
mov cl, [eax]
mov ebx, 0
add cl, 1
mov [eax], cl
mov esp, ebp
pop ebp
ret
>From gcc-bugs-return-524623-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 18:52:35 2016
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Subject: [Bug c++/70796] [DR 1030] Initialization order with braced-init-lists still broken
Date: Mon, 09 May 2016 18:52:00 -0000
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--- Comment #2 from TC <rs2740 at gmail dot com> ---
It occurred to me that one issue here is whether initialization of the
parameter object (of the constructor) is considered a "value computation [or]
side effect associated with" an initializer-clause. If not, then the current
behavior is correct - the increments are sequenced relative to each other but
not to the initialization of the parameter objects (which reads from 'i').
>From gcc-bugs-return-524624-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 19:07:31 2016
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Subject: [Bug c/71030] Strange segmentation fault
Date: Mon, 09 May 2016 19:07:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2016-05-09
CC| |hjl.tools at gmail dot com
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Please provide f.i.
>From gcc-bugs-return-524625-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 19:14:27 2016
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Subject: [Bug c++/71029] large fold expressions compile slowly with -Wall
Date: Mon, 09 May 2016 19:14:00 -0000
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Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
Could be my profiling going wrong, but we seem to spend a lot of time in
mark_used, with a running time at least quadratic in 2048, so maybe we mark as
used all the previous elements of the comma chain, for each element?
Clang does not emit the thousands of get<1234> functions. I am not sure we want
to follow them there, as it would make debugging harder.
>From gcc-bugs-return-524626-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 19:15:23 2016
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Subject: [Bug c/71013] [7 Regression] c-common.c:12810:37: error: 'LLONG_MAX' was not declared in this scope
Date: Mon, 09 May 2016 19:15:00 -0000
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--- Comment #3 from dave.anglin at bell dot net ---
On 2016-05-09 7:29 AM, John David Anglin wrote
> LLONG_MAX is not defined in hpux11.11. It comes from fixed limits.h:
> ./lib/gcc/hppa64-hp-hpux11.11/5.3.1/include-fixed/limits.h:# undef LLONG_MIN
> ./lib/gcc/hppa64-hp-hpux11.11/5.3.1/include-fixed/limits.h:# define LLONG_MIN (-LLONG_MAX - 1LL)
>
Should have provided more details:
#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
/* Minimum and maximum values a `signed long long int' can hold. */
# undef LLONG_MIN
# define LLONG_MIN (-LLONG_MAX - 1LL)
# undef LLONG_MAX
# define LLONG_MAX __LONG_LONG_MAX__
/* Maximum value an `unsigned long long int' can hold. (Minimum is 0). */
# undef ULLONG_MAX
# define ULLONG_MAX (LLONG_MAX * 2ULL + 1ULL)
#endif
__STDC_VERSION__ is not defined when c-family/c-common.c is
compiled with g++ driver. It is defined when gcc driver is used:
else if (CPP_OPTION (pfile, lang) == CLK_STDC94)
_cpp_define_builtin (pfile, "__STDC_VERSION__ 199409L");
else if (CPP_OPTION (pfile, lang) == CLK_STDC11
|| CPP_OPTION (pfile, lang) == CLK_GNUC11)
_cpp_define_builtin (pfile, "__STDC_VERSION__ 201112L");
else if (CPP_OPTION (pfile, c99))
_cpp_define_builtin (pfile, "__STDC_VERSION__ 199901L");
glimits.h has same issue.
>From gcc-bugs-return-524627-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 19:16:46 2016
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Subject: [Bug c/71030] Strange segmentation fault
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--- Comment #2 from Mateusz Forc <formateu at gmail dot com> ---
(In reply to H.J. Lu from comment #1)
> Please provide f.i.
f.i is not generated using -save-temps, how am I supposed to get this file?
>From gcc-bugs-return-524628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 19:18:27 2016
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Subject: [Bug tree-optimization/71031] New: [7 Regression] ICE in extract_range_from_binary_expr_1, at tree-vrp.c:2535 w/ -Os
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71031
Bug ID: 71031
Summary: [7 Regression] ICE in
extract_range_from_binary_expr_1, at tree-vrp.c:2535
w/ -Os
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-7.0.0-alpha20160508 snapshot ICEs when compiling the following reduced
testcase w/ -Os:
int zj;
int **yr;
void
nn (void)
{
unsigned int od = 4;
for (;;)
{
int lk;
for (lk = 0; lk < 2; ++lk)
{
static int cm;
zj = 0;
if (od == 0)
return;
++od;
for (cm = 0; cm < 2; ++cm)
{
--od;
**yr = 0;
}
}
}
}
% gcc-7.0.0-alpha20160508 -c -Os z5y81wfl.c
z5y81wfl.c: In function 'nn':
z5y81wfl.c:5:1: internal compiler error: in extract_range_from_binary_expr_1,
at tree-vrp.c:2535
nn (void)
^~
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Subject: [Bug c/71030] Strange segmentation fault
Date: Mon, 09 May 2016 19:28:00 -0000
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Mateusz Forc <formateu at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Resolution|--- |INVALID
>From gcc-bugs-return-524630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 19:30:36 2016
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From: "kendrick.killian at colostate dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/71032] New: explicit interface and must not have attributes generates gfortran: internal compiler error: Abort trap: 6 (program f951)
Date: Mon, 09 May 2016 19:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71032
Bug ID: 71032
Summary: explicit interface and must not have attributes
generates gfortran: internal compiler error: Abort
trap: 6 (program f951)
Product: gcc
Version: 5.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: kendrick.killian at colostate dot edu
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Created attachment 38458
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38458&action=edit
source file that generates f951 Segmentation fault
I had a routine that typed a function and declared it as external. I added the
function as an "contains" routine. An obvious over specification. The compiler
issued the
error message, Procedure ... has an explicit interface and must not have
attributes declared
the following error messages:
-----------------------
-----------------------
GCC VERSION:
gfortran -v
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/usr/local/gfortran/libexec/gcc/x86_64-apple-darwin14/5.2.0/lto-wrapper
Target: x86_64-apple-darwin14
Configured with: ../gcc-5.2.0/configure --prefix=/usr/local/gfortran
--with-gmp=/Users/fx/devel/gcc/deps-static/x86_64
--enable-languages=c,c++,fortran,objc,obj-c++ --build=x86_64-apple-darwin14
Thread model: posix
gcc version 5.2.0 (GCC)
system type:
Model Name: MacBook Pro
Model Identifier: MacBookPro8,2
Processor Name: Intel Core i7
System Version: OS X 10.11.4 (15E65)
Kernel Version: Darwin 15.4.0
Developer Tools:
Version: 7.3.1 (7D1014)
Location: /Applications/Xcode.app
Compile Command:
gfortran -O3 -fno-underscoring -Wunused -Waliasing -Wampersand -Wsurprising
-Wno-tabs -c internalerr.f90
compiler output:
catanf.f:5.28:
Included at internalerr.f90:40:
real function carctanf(x,a,b,c,d)
1
internalerr.f90:25.39:
real agdrat, bgdrat, carctanf
2
Error: Procedure 'carctanf' at (1) has an explicit interface and must not have
attributes declared at (2)
f951: internal compiler error: Segmentation fault: 11
f951: internal compiler error: Abort trap: 6
gfortran: internal compiler error: Abort trap: 6 (program f951)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Files:
Sorry I don't know where preprocessed file (*.i*) is
The short attached source file generate the error.
>From gcc-bugs-return-524631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 19:30:54 2016
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From: "klindsay at ucar dot edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/71014] associate statement inside omp parallel do appears to disable default private attribute for inner loop indices
Date: Mon, 09 May 2016 19:30:00 -0000
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--- Comment #6 from Keith Lindsay <klindsay at ucar dot edu> ---
Harald,
The problem does go away if I add a PRIVATE(i) clause to the OMP directive.
However, my understanding of OpenMP in fortran is that all loop iteration
variables, even inner nested loops, in an OpenMP PARALLEL DO construct (and
some others) are private by default. I.e., they do not need to be declared
private in the OMP directive. (I think this specification is different than the
specification for inner loops in C.)
Indeed, if I comment out the associate construct, the problem goes away. So I'm
inferring that the associate construct is interfering with the inner loop index
being assigned the private attribute.
Keith
>From gcc-bugs-return-524633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 19:41:39 2016
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Subject: [Bug c/71033] New: Segmentation fault c + intel assembly, unable to use EBX
Date: Mon, 09 May 2016 19:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71033
Bug ID: 71033
Summary: Segmentation fault c + intel assembly, unable to use
EBX
Product: gcc
Version: 6.1.1
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Created attachment 38459
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the preprocessed file
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/6.1.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc-multilib/src/gcc/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release
Thread model: posix
gcc version 6.1.1 20160501 (GCC)
Program runs intel x86 assembly function in main. Use of the EBX register
inside that function causes segmentation fault (after return from function).
It seems like gcc is using EBX instead of EBP before function call.
Program compiled using clang works properly.
Bug was noticed firstly on gcc 5.3.0 version, but is still present on latest
repository version.
Used makefile:
CC=gcc
CFLAGS= -Wall -m32 -O0 -save-temps
all: main.o f.o
$(CC) $(CFLAGS) main.o f.o -o fun
main.o: main.c
$(CC) $(CFLAGS) -c main.c -o main.o
command : make && ./fun 2
f.o: f.s
nasm -f elf -g f.s -o f.o
main.c :
#include "f.h" //only void f(char*)
int main(int argc, char *argv[])
{
if(argc < 2) {
return 1;
}
f(argv[1]);
return 0;
}
f.s :
;f.i is not generated
section .text
global f
f:
push ebp
mov ebp, esp
mov eax, [ebp+8]
mov ebx, 9
begin:
mov cl, [eax]
cmp cl, 0
jz end
add cl, 1
mov [eax], cl
inc eax
jmp begin
end:
mov esp, ebp
pop ebp
ret
>From gcc-bugs-return-524632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 19:41:38 2016
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From: "klindsay at ucar dot edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/71014] associate statement inside omp parallel do appears to disable default private attribute for inner loop indices
Date: Mon, 09 May 2016 19:41:00 -0000
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--- Comment #7 from Keith Lindsay <klindsay at ucar dot edu> ---
The Linux system that I'm working on has multiple versions of gcc/gfortran
installed. I've compiled and run my example program with different versions and
have found the following:
Versions 4.9.0, 4.9.1, 4.9.2, 4.9.3, 5.0.1, 5.1.0
Program, as is, works (i.e. no reported mismatches over 10 runs)
Versions 5.2.0, 5.3.0, 6.0.1, 6.1.0
Program, as is, reports mismatches (and sometimes hangs)
So it seems like the behavior I'm seeing originated in 5.2.0.
>From gcc-bugs-return-524634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 20:00:47 2016
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Subject: [Bug c/71033] Segmentation fault c + intel assembly, unable to use EBX
Date: Mon, 09 May 2016 20:00:00 -0000
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--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
x86 ABI requires that %ebx is preserved across function call. So, you need to
save it to stack in f.s and restore it before function returs. Or, you can use
%edx instead, which can be clobbered in function.
>From gcc-bugs-return-524635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 20:04:10 2016
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Subject: [Bug fortran/71027] -fsanitizedress catches out of bounds access on assumed size array only with -O0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71027
--- Comment #2 from Vittorio Zecca <zeccav at gmail dot com> ---
Yes, you are right, and probably in real programs the subroutine would
not be optimized away.
Thank you for the explanation.
>From gcc-bugs-return-524636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 20:06:30 2016
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From: "formateu at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/71033] Segmentation fault c + intel assembly, unable to use EBX
Date: Mon, 09 May 2016 20:06:00 -0000
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Mateusz Forc <formateu at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Mateusz Forc <formateu at gmail dot com> ---
(In reply to Uroš Bizjak from comment #1)
> x86 ABI requires that %ebx is preserved across function call. So, you need
> to save it to stack in f.s and restore it before function returs. Or, you
> can use %edx instead, which can be clobbered in function.
>From gcc-bugs-return-524637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 20:24:18 2016
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From: "cesar at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/69363] ICE when doing a pragma simd reduction with max
Date: Mon, 09 May 2016 20:24:00 -0000
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--- Comment #8 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Mon May 9 20:23:31 2016
New Revision: 236047
URL: https://gcc.gnu.org/viewcvs?rev=236047&root=gcc&view=rev
Log:
Backport trunk r235290:
2016-04-20 Ilya Verbin <ilya.verbin@intel.com>
gcc/c-family/
PR c++/69363
* c-cilkplus.c (c_finish_cilk_clauses): Remove function.
* c-common.h (c_finish_cilk_clauses): Remove declaration.
gcc/c/
PR c++/69363
* c-parser.c (c_parser_cilk_all_clauses): Use c_finish_omp_clauses
instead of c_finish_cilk_clauses.
* c-tree.h (c_finish_omp_clauses): Add new default argument.
* c-typeck.c (c_finish_omp_clauses): Add new argument. Allow
floating-point variables in the linear clause for Cilk Plus.
gcc/cp/
PR c++/69363
* cp-tree.h (finish_omp_clauses): Add new default argument.
* parser.c (cp_parser_cilk_simd_all_clauses): Use finish_omp_clauses
instead of c_finish_cilk_clauses.
* semantics.c (finish_omp_clauses): Add new argument. Allow
floating-point variables in the linear clause for Cilk Plus.
gcc/testsuite/
PR c++/69363
* c-c++-common/cilk-plus/PS/clauses3.c: Adjust dg-error string.
* c-c++-common/cilk-plus/PS/clauses4.c: New test.
* c-c++-common/cilk-plus/PS/pr69363.c: New test.
Added:
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/cilk-plus/PS/clauses4.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/cilk-plus/PS/pr69363.c
Modified:
branches/gomp-4_0-branch/gcc/c-family/ChangeLog.gomp
branches/gomp-4_0-branch/gcc/c-family/c-cilkplus.c
branches/gomp-4_0-branch/gcc/c-family/c-common.h
branches/gomp-4_0-branch/gcc/c/ChangeLog.gomp
branches/gomp-4_0-branch/gcc/c/c-parser.c
branches/gomp-4_0-branch/gcc/c/c-tree.h
branches/gomp-4_0-branch/gcc/c/c-typeck.c
branches/gomp-4_0-branch/gcc/cp/ChangeLog.gomp
branches/gomp-4_0-branch/gcc/cp/cp-tree.h
branches/gomp-4_0-branch/gcc/cp/parser.c
branches/gomp-4_0-branch/gcc/cp/semantics.c
branches/gomp-4_0-branch/gcc/testsuite/ChangeLog.gomp
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>From gcc-bugs-return-524638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 20:31:49 2016
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From: "anlauf at gmx dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/71014] associate statement inside omp parallel do appears to disable default private attribute for inner loop indices
Date: Mon, 09 May 2016 20:31:00 -0000
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--- Comment #8 from Harald Anlauf <anlauf at gmx dot de> ---
(In reply to Keith Lindsay from comment #6)
> Harald,
>
> The problem does go away if I add a PRIVATE(i) clause to the OMP directive.
>
> However, my understanding of OpenMP in fortran is that all loop iteration
> variables, even inner nested loops, in an OpenMP PARALLEL DO construct (and
> some others) are private by default. I.e., they do not need to be declared
> private in the OMP directive. (I think this specification is different than
> the specification for inner loops in C.)
The OpenMP 4.5 standard says (2.15.1.1, for Fortran):
- The loop iteration variable(s) in the associated do-loop(s) of a do,
parallel do, taskloop, or distribute construct is (are) private.
[...]
- A loop iteration variable for a sequential loop in a parallel or task
generating construct is private in the innermost such construct that
encloses the loop.
[...]
Now the question is: what are the "associated do-loop(s)"? And
what exactly does the second item above mean?
I'm not too versed in reading the standard, and I tend to be on the
conservative side here and interpret the ASSOCIATE construct to
generate something like a BLOCK that makes things interesting, so
that the i loop is to be dealt with separately. (I usually declare
all loop variables explicitly.)
What do you get when replacing ASSOCIATE by BLOCK/END BLOCK?
I'd expect you experience the same problem.
> Indeed, if I comment out the associate construct, the problem goes away. So
> I'm inferring that the associate construct is interfering with the inner
> loop index being assigned the private attribute.
>
> Keith
I would recommend to always validate OpenMP parallelized code under
some suitable tool, like valgrind/helgrind, gcc/thread-sanitizer, or
Intel Inspector. Don't rely on just running your code.
(I get a possible data race when running your original code under
valgrind with gfortran and ifort, and a cross-thread stack access
with ifort/Intel Inspector for the line doing the accumulation.
However, I also get this for the fixed code.)
If you need more insight on what gfortran is doing, add the option
"-fdump-tree-original" and compare the resulting intermediate files
*.003t.original.
>From gcc-bugs-return-524639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 20:43:34 2016
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Subject: [Bug middle-end/70626] bogus results in 'acc parallel loop' reductions
Date: Mon, 09 May 2016 20:43:00 -0000
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--- Comment #6 from cesar at gcc dot gnu.org ---
Author: cesar
Date: Mon May 9 20:42:47 2016
New Revision: 236049
URL: https://gcc.gnu.org/viewcvs?rev=236049&root=gcc&view=rev
Log:
Backport trunk r235651:
2016-04-29 Cesar Philippidis <cesar@codesourcery.com>
gcc/c-family/
PR middle-end/70626
* c-common.h (c_oacc_split_loop_clauses): Add boolean argument.
* c-omp.c (c_oacc_split_loop_clauses): Use it to duplicate
reduction clauses in acc parallel loops.
gcc/c/
PR middle-end/70626
* c-parser.c (c_parser_oacc_loop): Don't augment mask with
OACC_LOOP_CLAUSE_MASK.
(c_parser_oacc_kernels_parallel): Update call to
c_oacc_split_loop_clauses.
gcc/cp/
PR middle-end/70626
* parser.c (cp_parser_oacc_loop): Don't augment mask with
OACC_LOOP_CLAUSE_MASK.
(cp_parser_oacc_kernels_parallel): Update call to
c_oacc_split_loop_clauses.
gcc/fortran/
PR middle-end/70626
* trans-openmp.c (gfc_trans_oacc_combined_directive): Duplicate
the reduction clause in both parallel and loop directives.
gcc/testsuite/
PR middle-end/70626
* c-c++-common/goacc/combined-reduction.c: New test.
* gfortran.dg/goacc/reduction-2.f95: Add check for kernels reductions.
libgomp/
PR middle-end/70626
* testsuite/libgomp.oacc-c++/template-reduction.C: Adjust test.
* testsuite/libgomp.oacc-c-c++-common/combined-reduction.c: New test.
* testsuite/libgomp.oacc-fortran/combined-reduction.f90: New test.
Added:
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/combined-reduction.c
branches/gomp-4_0-branch/gcc/testsuite/c-c++-common/goacc/pr70688.c
branches/gomp-4_0-branch/libgomp/testsuite/libgomp.oacc-c-c++-common/combined-reduction.c
branches/gomp-4_0-branch/libgomp/testsuite/libgomp.oacc-fortran/combined-reduction.f90
Modified:
branches/gomp-4_0-branch/gcc/c-family/ChangeLog.gomp
branches/gomp-4_0-branch/gcc/c-family/c-common.h
branches/gomp-4_0-branch/gcc/c-family/c-omp.c
branches/gomp-4_0-branch/gcc/c/ChangeLog.gomp
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branches/gomp-4_0-branch/gcc/fortran/ChangeLog.gomp
branches/gomp-4_0-branch/gcc/fortran/gfortran.h
branches/gomp-4_0-branch/gcc/fortran/match.c
branches/gomp-4_0-branch/gcc/fortran/trans-openmp.c
branches/gomp-4_0-branch/gcc/testsuite/ChangeLog.gomp
branches/gomp-4_0-branch/gcc/testsuite/gfortran.dg/goacc/combined-directives.f90
branches/gomp-4_0-branch/gcc/testsuite/gfortran.dg/goacc/reduction-2.f95
branches/gomp-4_0-branch/libgomp/testsuite/libgomp.oacc-c++/template-reduction.C
>From gcc-bugs-return-524640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 20:44:08 2016
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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70988] missing buffer overflow detection in chained strcat calls
Date: Mon, 09 May 2016 20:44:00 -0000
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Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|missing buffer overflow |missing buffer overflow
|warning on chained strcat |detection in chained strcat
|calls |calls
Known to fail| |4.5.3, 4.8.3, 4.9.3, 5.3.0,
| |6.1.0
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Furthermore, in cases where GCC does optimize multiple chained strcat calls
into calls to __builtin_memcpy (which are then expanded into inline assembly)
as in the test case below, it fails to add the instrumentation necessary to
detect the buffer overflow.
$ cat xxx.c && /home/msebor/build/gcc-trunk-git/gcc/xgcc
-B/home/msebor/build/gcc-trunk-git/gcc -D_FORTIFY_SOURCE=2 -O2 -S -Wall -Wextra
-Wpedantic -fdump-tree-optimized=/dev/stdout xxx.c && ./a.out
#include <string.h>
void __attribute__ ((noclone, noinline))
f (const char *s)
{
__builtin_printf ("\"%s\"\n", s);
}
void __attribute__ ((noclone, noinline))
g (void)
{
char a [4] = "";
strcat (a, "abc");
strcat (a, "def");
strcat (a, "ghi");
strcat (a, "jkl");
f (a);
}
int main ()
{
g ();
}
;; Function f (f, funcdef_no=24, decl_uid=2214, cgraph_uid=24, symbol_order=24)
__attribute__((noinline, noclone))
f (const char * s)
{
<bb 2>:
__builtin_printf ("\"%s\"\n", s_2(D)); [tail call]
return;
}
;; Function g (g, funcdef_no=25, decl_uid=2217, cgraph_uid=25, symbol_order=25)
__attribute__((noinline, noclone))
g ()
{
char a[4];
<bb 2>:
MEM[(char * {ref-all})&a] = "abc";
__builtin_memcpy (&MEM[(void *)&a + 3B], "def", 4);
__builtin_memcpy (&MEM[(void *)&a + 6B], "ghi", 4);
__builtin_memcpy (&MEM[(void *)&a + 9B], "jkl", 4);
f (&a);
a ={v} {CLOBBER};
return;
}
;; Function main (main, funcdef_no=26, decl_uid=2220, cgraph_uid=26,
symbol_order=26) (executed once)
main ()
{
<bb 2>:
g ();
return 0;
}
"�@abcdef"
>From gcc-bugs-return-524641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 21:19:05 2016
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Subject: [Bug tree-optimization/71034] New: abs(f) u>= 0. is always true
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71034
Bug ID: 71034
Summary: abs(f) u>= 0. is always true
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
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A very simple missed optimization, we optimize abs(x)<0 to false (in forwprop,
haven't found the exact place yet) but not abs(x) u>= 0 to true. I noticed it
because cdce now produces this comparison for sqrt, which causes a small
regression on a dead sqrt(abs(x)).
int f(double x){
x=__builtin_fabs(x);
// return x<0;
return !__builtin_isless(x,0);
}
>From gcc-bugs-return-524642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 21:31:25 2016
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Subject: [Bug tree-optimization/71034] abs(f) u>= 0. is always true
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think this is the optimizations that should be done:
abs(x) < 0 -> x != x
abs(x) >= 0 -> x u== x
abs(x) == 0 -> x == 0
abs(x) <= 0 -> x == 0 (since this is an ordered comparison)
abs(x) u< 0 -> false
abs(x) u>= 0 -> false
abs(x) u== 0 -> x == 0
I Hope I did not mess this up and got the unordered comparisons correct.
>From gcc-bugs-return-524643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 21:41:41 2016
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Subject: [Bug tree-optimization/71034] abs(f) u>= 0. is always true
Date: Mon, 09 May 2016 21:41:00 -0000
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> I think this is the optimizations that should be done:
> abs(x) < 0 -> x != x
for x=NaN, abs(x) is NaN, and NaN<0 is false. So the current simplification to
false seems correct.
> abs(x) >= 0 -> x u== x
x == x. I'd like to canonicalize it to x ord x, but that's a different issue.
> abs(x) == 0 -> x == 0
> abs(x) <= 0 -> x == 0 (since this is an ordered comparison)
ok
> abs(x) u< 0 -> false
> abs(x) u>= 0 -> false
u<, u>= are true if an argument is NaN... u< can simplify to x unord x, and u>=
is always true.
> abs(x) u== 0 -> x == 0
x u== 0
>From gcc-bugs-return-524644-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 21:49:25 2016
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Subject: [Bug fortran/56226] Add support for DEC UNION and MAP extensions
Date: Mon, 09 May 2016 21:49:00 -0000
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--- Comment #30 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Mon, May 09, 2016 at 02:55:01PM +0000, fritzoreese at gmail dot com wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56226
>
> --- Comment #29 from Fritz Reese <fritzoreese at gmail dot com> ---
> (In reply to Andreas Schwab from comment #25)
> > FAIL: gfortran.dg/dec_union_4.f90 -O0 execution test
> > FAIL: gfortran.dg/dec_union_4.f90 -O1 execution test
> > FAIL: gfortran.dg/dec_union_4.f90 -O2 execution test
> > FAIL: gfortran.dg/dec_union_4.f90 -O3 -fomit-frame-pointer -funroll-loops
> > -fpeel-loops -ftracer -finline-functions execution test
> > FAIL: gfortran.dg/dec_union_4.f90 -O3 -g execution test
> > FAIL: gfortran.dg/dec_union_4.f90 -Os execution test
>
> It was silly of me to disregard endian-ness in this test case. Fixed:
>
> https://gcc.gnu.org/ml/fortran/2016-05/msg00018.html
>
Thanks for the patch. I'll take care of this on Saturday,
if no one else commits before then.
>From gcc-bugs-return-524645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 22:05:40 2016
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Subject: [Bug target/70963] vec_cts/vec_ctf intrinsics produce wrong results for 64-bit floating point
Date: Mon, 09 May 2016 22:05:00 -0000
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--- Comment #2 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
The xxswapd's are a bit of a red herring. These are part of the little-endian
normalization code that are required with the funky lxvd2x and stxvd2x
instructions. The problem appears to be the register assignment on the
instructions generated for vec_cts and vec_ctf. The use of vs12 on vec_cts is
an obvious problem, since vs12 doesn't contain any value assigned in the
function. The code for vec_ctf looks fine. So we need to figure out what
happened with the register number on xvcvdpsxds.
The problem still exists on trunk.
>From gcc-bugs-return-524646-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 22:08:19 2016
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Subject: [Bug target/70957] testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on power7
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--- Comment #9 from Bill Seurer <seurer at linux dot vnet.ibm.com> ---
Systems where I see it fail:
granola
yavin3
Systems where I do not:
bns
All are power7 BE systems. I didn't do anything special on any of the systems.
I ran configure like this on all of them:
/home/seurer/gcc/gcc-test/configure --prefix=/home/seurer/gcc/install/gcc-test
--enable-languages=c,fortran,c++ --disable-multilib --disable-libsanitizer
--disable-bootstrap
Different compiler versions were used to build on all of the systems.
seurer@bns:~/gcc/build/gcc-test$ $CC --version
gcc (SUSE Linux) 4.3.4 [gcc-4_3-branch revision 152973]
On bns I also tried a bootstrapped gcc 7.0 and the test case still worked
there.
seurer@yavin3:~/gcc/build/gcc-test$ $CC --version
gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16)
seurer@granola:~/gcc/build/gcc-test$ $CC --version
gcc (GCC) 5.3.0
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Subject: [Bug c++/71035] New: GNU does not give error on declaration of non literal type in template function
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Both EDG and Clang give an error on the code below.
GNU only gives an error if call() is not a template function (see -DERROR
below) or if call() is used in a way that requires it to be constexpr (i.e. in
a static_assert).
I think this should be an error.
struct C
{
C(); // constructor is not declared constexpr
};
#ifdef ERROR
#else
template <class T>
#endif
constexpr void call()
{
C c;
}
int main() {
#ifdef ERROR
call();
#else
call<int>();
#endif
return 0;
}
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Subject: [Bug target/70963] vec_cts/vec_ctf intrinsics produce wrong results for 64-bit floating point
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--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Note also that your asm constraints are wrong. You need VSX registers, not
Altivec registers, so you should be using the "wa" constraint instead of the
"v" constraint. This is why you get some apparently wrong register numbers
with your asm results.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70963
--- Comment #4 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
OK, there is an obvious bug in the define_expand for vsx_xvcvdpsxds_scale. If
the scale factor is 0, wrong code is always generated. I'll get a patch going.
>From gcc-bugs-return-524650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 22:57:55 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/71032] explicit interface and must not have attributes generates gfortran: internal compiler error: Abort trap: 6 (program f951)
Date: Mon, 09 May 2016 22:57:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2016-05-09
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
There is no ICE (only normal errors) when compiling the tests with gfortran
6.1.0 and trunk (7.0).
The ICE has been fixed between revisions r223447 (2015-05-20, ICE) and r223694
(2015-05-26, errors), likely r223614 (last patch for pr44054). AFAICT there is
no plan to back port the fix to the gcc-5 branch. Unless someone objects, I'll
close this PR as fixed in the coming days.
>From gcc-bugs-return-524651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 23:01:38 2016
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Subject: [Bug fortran/71014] associate statement inside omp parallel do appears to disable default private attribute for inner loop indices
Date: Mon, 09 May 2016 23:01:00 -0000
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--- Comment #9 from Keith Lindsay <klindsay at ucar dot edu> ---
Harald,
Thanks for your tips on validation/sanitizing tools.
I am not sufficiently fluent in standard-ese to know what 'associated
do-loops(s)" means. It doesn't help that BLOCK and ASSOCIATE appear in other
contexts in the OpenMP standard, making it challenging to locate information
about them in the standard.
If I replace ASSOCIATE with BLOCK/END BLOCK, I do see the same problems.
I added -fdump-tree-original to the gfortran invocation and compiled code with
and without the BLOCK construct. The generated intermediate files have the
difference
@@ -6,7 +6,7 @@
static integer(kind=4) s_true = 5050;
s = {};
- #pragma omp parallel private(i)
+ #pragma omp parallel
{
{
#pragma omp for private(j) nowait
(There are other differences that appear to simply be renaming of labels, I'm
ignoring those.) So it does seem that the presence of the BLOCK construct is
changing how the compiler assigns attributes to the inner loop index. I didn't
think this was correct, but perhaps I'm misunderstanding how the OpenMP and
Fortran standards interact.
At this point, I would like to know if the compiler is in the right in doing
this. If it is, then I would change my coding practice. If it isn't, then I
assume that gfortran developers would want to know about this.
Keith
>From gcc-bugs-return-524652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 23:13:07 2016
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From: "amodra at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70947] regrename Go breakage on powerpc64
Date: Mon, 09 May 2016 23:13:00 -0000
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--- Comment #1 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Mon May 9 23:12:20 2016
New Revision: 236052
URL: https://gcc.gnu.org/viewcvs?rev=236052&root=gcc&view=rev
Log:
[RS6000] Stop regrename twiddling with split-stack prologue
PR target/70947
* config/rs6000/rs6000.c (rs6000_expand_split_stack_prologue): Stop
regrename modifying insns saving lr before __morestack call.
* config/rs6000/rs6000.md (split_stack_return): Similarly for
insns restoring lr after __morestack call.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/config/rs6000/rs6000.md
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/68945] enable libcilkrts on SPARC
Date: Mon, 09 May 2016 23:27:00 -0000
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--- Comment #11 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> * In runtime/config/sparc/os-unix-sysdep.c (__cilkrts_getticks) I needed
> different
> 32- and 64-bit versions. I tested the result in standalone program which
> just
> printed the result.
This looks good to me.
> * One thing I wonder about is runtime/config/sparc/os-fence.h: when using
> __sync_synchronize, gcc emits membar #StoreLoad, while Stefan's patch had
> membar #LoadLoad | #LoadStore | #StoreStore | #StoreLoad. It seems that
> all but #StoreLoad are no-ops for TSO SPARC CPUs, but I'd better get this
> right.
__sync_synchronize emits the minimum memory barrier for the memory model, which
is TSO on Solaris so only #StoreLoad is needed. The 4 flags are needed for RMO
theoretically, but I'm not sure RMO ever existed in real life.
>From gcc-bugs-return-524654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 23:38:15 2016
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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++/71035] GNU does not give error on declaration of non literal type in template function
Date: Mon, 09 May 2016 23:38:00 -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| |2016-05-09
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |4.9.3, 5.3.0, 6.1.0
Severity|normal |enhancement
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Hi Judy!
I'll take a stab at this -- let me know if I missed something. I agree that
similarly to the non-template case, (in the absence of a valid explicit
specialization) diagnosing the constexpr function template below would be
useful, even though in p5 and p6 of [dcl.constexpr], the standard leaves both
cases as a matter of QoI:
-6- If the instantiated template specialization of a constexpr function
template o member function of a class template would fail to satisfy the
requirements for a constexpr function or constexpr constructor, that
specialization is still a constexpr function or constexpr constructor, even
though a call to such a function cannot appear in a constant expression. If no
specialization of the template would satisfy the requirements for a constexpr
function or constexpr constructor when considered as a non-template function or
constructor, the template is ill-formed; no diagnostic required.
(I read the last sentence as referring to implicit specializations of the
template definition, not explicit ones with valid definitions.)
Thus, I'm inclined to view this bug not as a defect but an enhancement request.
Let me know if you disagree.
Clang is more strict than GCC here by issuing the optional diagnostic.
My copy of EDG (version 4.10) rejects the program because it doesn't fully
implement the C++ 14 rules: a) it doesn't recognize void as a literal type, and
b) it doesn't allow statements in constexpr functions.
>From gcc-bugs-return-524655-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon May 09 23:56:47 2016
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Subject: [Bug c/71013] [7 Regression] c-common.c:12810:37: error: 'LLONG_MAX' was not declared in this scope
Date: Mon, 09 May 2016 23:56:00 -0000
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--- Comment #4 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 38460
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38460&action=edit
Patch
This fixes build failure on hppa64-hpux. Not sure its the right place
or even right fix.
>From gcc-bugs-return-524656-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 00:00:46 2016
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From: "Judy.Ward at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/71035] GNU does not give error on declaration of non literal type in template function
Date: Tue, 10 May 2016 00:00:00 -0000
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--- Comment #2 from Judy Ward <Judy.Ward at intel dot com> ---
Yes I have a beta copy of EDG
4.11 which has relaxed constexpr and they give an error. Unfortunately some
Boost code (I think inadvertently) relies on not giving a diagnostic.
Yes I see your point that this is really a QOI issue but GNU does seem
inconsistent and EDG will have to emulate that inconsistency.
Thanks
Judy
> On May 9, 2016, at 7:38 PM, msebor at gcc dot gnu.org <gcc-bugzilla@gcc.gnu.org> wrote:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71035
>
> Martin Sebor <msebor at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Keywords| |accepts-invalid
> Status|UNCONFIRMED |NEW
> Last reconfirmed| |2016-05-09
> CC| |msebor at gcc dot gnu.org
> Ever confirmed|0 |1
> Known to fail| |4.9.3, 5.3.0, 6.1.0
> Severity|normal |enhancement
>
> --- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
> Hi Judy!
>
> I'll take a stab at this -- let me know if I missed something. I agree that
> similarly to the non-template case, (in the absence of a valid explicit
> specialization) diagnosing the constexpr function template below would be
> useful, even though in p5 and p6 of [dcl.constexpr], the standard leaves both
> cases as a matter of QoI:
>
> -6- If the instantiated template specialization of a constexpr function
> template o member function of a class template would fail to satisfy the
> requirements for a constexpr function or constexpr constructor, that
> specialization is still a constexpr function or constexpr constructor, even
> though a call to such a function cannot appear in a constant expression. If no
> specialization of the template would satisfy the requirements for a constexpr
> function or constexpr constructor when considered as a non-template function or
> constructor, the template is ill-formed; no diagnostic required.
>
> (I read the last sentence as referring to implicit specializations of the
> template definition, not explicit ones with valid definitions.)
>
> Thus, I'm inclined to view this bug not as a defect but an enhancement request.
> Let me know if you disagree.
>
> Clang is more strict than GCC here by issuing the optional diagnostic.
>
> My copy of EDG (version 4.10) rejects the program because it doesn't fully
> implement the C++ 14 rules: a) it doesn't recognize void as a literal type, and
> b) it doesn't allow statements in constexpr functions.
>
> --
> You are receiving this mail because:
> You reported the bug.
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From: "eric at efcs dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/71036] New: create_directory(p, ...) reports a failure when 'p' is an existing directory
Date: Tue, 10 May 2016 01:00:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71036
Bug ID: 71036
Summary: create_directory(p, ...) reports a failure when 'p' is
an existing directory
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: eric at efcs dot ca
Target Milestone: ---
The create_directory functions should not report an error when the directory
they are trying to create already exists. The create_directory(...) functions
seem to report this error.
#include <experimental/filesystem>
#include <cassert>
using namespace std::experimental::filesystem;
int main() {
path p = "/tmp/foo";
assert(!exists(p));
create_directory(p); // create the directory once
create_directory(p); // THROWS!
}
>From gcc-bugs-return-524658-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 01:20:20 2016
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From: "eric at efcs dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/71037] New: Exceptions thrown from "filesystem::canonical(...)" should contain both paths.
Date: Tue, 10 May 2016 01:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71037
Bug ID: 71037
Summary: Exceptions thrown from "filesystem::canonical(...)"
should contain both paths.
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
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The filesystem error thrown from canonical only contains the first path, not
the base. Since the base path can be user specified the exception should
contain this as well.
#include <experimental/filesystem>
#include <cassert>
using namespace std::experimental::filesystem;
int main() {
const path p = "DNE"
const path base = "BASE";
try {
canonical(p, base);
assert(false);
} catch (filesystem_error const& err) {
assert(err.path1() == p);
assert(err.path2() == base); // FIRES
}
}
>From gcc-bugs-return-524659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 01:24:02 2016
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From: "eric at efcs dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/71038] New: copy_file(...) returns false on successful copy.
Date: Tue, 10 May 2016 01:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71038
Bug ID: 71038
Summary: copy_file(...) returns false on successful copy.
Product: gcc
Version: 6.0
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Priority: P3
Component: libstdc++
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The title says it all. copy_file always seems to return false.
Example:
#include <experimental/filesystem>
#include <fstream>
#include <cassert>
using namespace std::experimental::filesystem;
int main() {
std::ofstream out("/tmp/foo.txt");
out << "hello world!\n";
out.close();
const path p = "/tmp/foo.txt";
const path to = "/tmp/bar.txt";
bool ret = copy_file(p, to);
assert(ret == true);
}
>From gcc-bugs-return-524660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 03:13:28 2016
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Subject: [Bug tree-optimization/71039] New: [7 Regression] ICE: verify_ssa failed (error: definition in block 4 does not dominate use in block 5) w/ -O1 and above
Date: Tue, 10 May 2016 03:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71039
Bug ID: 71039
Summary: [7 Regression] ICE: verify_ssa failed (error:
definition in block 4 does not dominate use in block
5) w/ -O1 and above
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
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gcc-7.0.0-alpha20160508 snapshot ICEs when compiling the following reduced
snippet at -O1 and above:
struct wv
{
int qi;
} qp, *ft;
void *pb;
void
wz (void)
{
struct wv *vf = pb ? (struct wv *)&pb : &qp;
*ft = *vf;
}
% x86_64-pc-linux-gnu-gcc-7.0.0-alpha20160508 -c -O1 fo7dullr.c
fo7dullr.c: In function 'wz':
fo7dullr.c:8:1: error: definition in block 4 does not dominate use in block 5
wz (void)
^~
for SSA_NAME: ft.2_2 in statement:
# .MEM_7 = VDEF <.MEM_4(D)>
*ft.2_2 = MEM[(struct wv *)&pb];
fo7dullr.c:8:1: internal compiler error: verify_ssa failed
>From gcc-bugs-return-524661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 04:06:09 2016
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Subject: [Bug tree-optimization/71040] New: [7 Regression] ICE: verify_gimple failed (error: invalid operand in unary operation; error: incorrect sharing of tree nodes) w/ -O3
Date: Tue, 10 May 2016 04:06:00 -0000
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Bug ID: 71040
Summary: [7 Regression] ICE: verify_gimple failed (error:
invalid operand in unary operation; error: incorrect
sharing of tree nodes) w/ -O3
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
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Assignee: unassigned at gcc dot gnu.org
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gcc-7.0.0-alpha20160508 ICEs when compiling the following reduced snippet w/
-O3:
struct
{
int b8 : 24;
} ud, ce;
int et;
void
fo (void);
void
p4 (int pn)
{
while (et != 0)
{
short int *uc = (short int *)&ud;
if (pn != 0)
fo ();
*uc = ce.b8;
++et;
}
}
% gcc-7.0.0-alpha20160508 -c -O3 apdexura.c
apdexura.c: In function 'p4':
apdexura.c:11:1: error: invalid operand in unary operation
p4 (int pn)
^~
# VUSE <.MEM_8(D)>
ce_b8_lsm0.5_6 = (<unnamed-signed:24>) MEM[(struct *)&ce];
apdexura.c:11:1: error: invalid operand in unary operation
apdexura.c:11:1: error: incorrect sharing of tree nodes
MEM[(struct *)&ce]
# VUSE <.MEM_8(D)>
_23 = (short int) MEM[(struct *)&ce];
apdexura.c:11:1: internal compiler error: verify_gimple failed
>From gcc-bugs-return-524662-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 06:36:03 2016
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From: "markos at freevec dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/70963] vec_cts/vec_ctf intrinsics produce wrong results for 64-bit floating point
Date: Tue, 10 May 2016 06:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70963
--- Comment #5 from Konstantinos Margaritis <markos at freevec dot org> ---
Ack, thanks for the heads up on VSX registers, it does print more reasonable
results now.
>From gcc-bugs-return-524663-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 07:11:47 2016
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From: "sh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/70720] moxie-rtems stanza does not include crti/crtn extra_parts
Date: Tue, 10 May 2016 07:11:00 -0000
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--- Comment #1 from sh at gcc dot gnu.org ---
Author: sh
Date: Tue May 10 07:11:00 2016
New Revision: 236064
URL: https://gcc.gnu.org/viewcvs?rev=236064&root=gcc&view=rev
Log:
[RTEMS] Fix moxie libgcc support
libgcc/
PR libgcc/70720
* config.host (moxie-*-rtems*): Merge this stanza with other moxie
targets so the same extra_parts are built. Also have tmake_file add
on to its value rather than override.
Modified:
trunk/libgcc/ChangeLog
trunk/libgcc/config.host
>From gcc-bugs-return-524664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 07:13:38 2016
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Subject: [Bug tree-optimization/71039] [7 Regression] ICE: verify_ssa failed (error: definition in block 4 does not dominate use in block 5) w/ -O1 and above
Date: Tue, 10 May 2016 07:13:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-10
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r235208.
>From gcc-bugs-return-524665-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 07:14:01 2016
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Subject: [Bug tree-optimization/71039] [7 Regression] ICE: verify_ssa failed (error: definition in block 4 does not dominate use in block 5) w/ -O1 and above
Date: Tue, 10 May 2016 07:14:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-524666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 07:16:02 2016
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Subject: [Bug tree-optimization/71040] [7 Regression] ICE: verify_gimple failed (error: invalid operand in unary operation; error: incorrect sharing of tree nodes) w/ -O3
Date: Tue, 10 May 2016 07:16:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r235871.
>From gcc-bugs-return-524667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 07:22:41 2016
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Subject: [Bug tree-optimization/71040] [7 Regression] ICE: verify_gimple failed (error: invalid operand in unary operation; error: incorrect sharing of tree nodes) w/ -O3
Date: Tue, 10 May 2016 07:22:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |jakub at gcc dot gnu.org
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
r236032 should have fixed this already.
>From gcc-bugs-return-524668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 07:29:17 2016
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Subject: [Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Tue, 10 May 2016 07:29:00 -0000
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
So optimize_bit_field_compare does make a difference implementation-wise
(but not really fixes the undefinedness in the boost code wrt the access
of the non-active union-member when reading from is_short).
optimize_bit_field_compare turns
((const struct string *) this)->m_repr.s.h.is_short != 0
into
(BIT_FIELD_REF <*(const struct string *) this, 8, 0> & 1) != 0
where the former memory access uses alias-set zero because of
c-common.c:c_common_get_alias_set handling of union-accesses:
/* Permit type-punning when accessing a union, provided the access
is directly through the union. For example, this code does not
permit taking the address of a union member and then storing
through it. Even the type-punning allowed here is a GCC
extension, albeit a common and useful one; the C standard says
that such accesses have implementation-defined behavior. */
for (u = t;
TREE_CODE (u) == COMPONENT_REF || TREE_CODE (u) == ARRAY_REF;
u = TREE_OPERAND (u, 0))
if (TREE_CODE (u) == COMPONENT_REF
&& TREE_CODE (TREE_TYPE (TREE_OPERAND (u, 0))) == UNION_TYPE)
return 0;
(which is something I am trying to get rid of for quite some time ...)
And the latter gets alias-set (that of type 'string') (which I think
is the better behavior, even if "miscompiling" this case).
Not applying optimize_bit_field_compare also gets us better optimization,
removing dead code already at the early GIMPLE level.
>From gcc-bugs-return-524669-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 07:43:42 2016
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Subject: [Bug middle-end/70988] missing buffer overflow detection in chained strcat calls
Date: Tue, 10 May 2016 07:43:00 -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> ---
At least #c1 is indeed a tree-ssa-strlen.c bug.
It transforms
a = "";
__builtin___strcat_chk (&a, "abc", 4);
__builtin___strcat_chk (&a, "def", 4);
__builtin___strcat_chk (&a, "ghi", 4);
__builtin___strcat_chk (&a, "jkl", 4);
into:
a = "";
__builtin___memcpy_chk (&a, "abc", 4, 4);
_9 = &a + 3;
__builtin___memcpy_chk (_9, "def", 4, 4);
_10 = &a + 6;
__builtin___memcpy_chk (_10, "ghi", 4, 4);
_11 = &a + 9;
__builtin___memcpy_chk (_11, "jkl", 4, 4);
which is wrong, we need to subtract the current known length of the destination
string from the __strcat_chk BOS sizes to get the __memcpy_chk BOS size (and
both have to be integers), otherwise we have to punt on the transformation (BOS
can't be variable). So the above would be:
a = "";
__builtin___memcpy_chk (&a, "abc", 4, 4);
_9 = &a + 3;
__builtin___memcpy_chk (_9, "def", 4, 1);
_10 = &a + 6;
__builtin___memcpy_chk (_10, "ghi", 4, 0);
_11 = &a + 9;
__builtin___memcpy_chk (_11, "jkl", 4, 0);
For known variable length of destination string before __strcat_chk, the
question is if we shouldn't transform it to memcpy instead with if (var_len +
const_size >= strcat_bos) __chk_fail (); but we'd then might run into overflow
issues and from the basic design principle that -D_FORTIFY_SOURCE=2 should
provide only very cheap checks. So maybe use ADD_OVERFLOW too on the addition?
The strcat -> memcpy transformation is important on the other side, would be
bad if we lost it.
>From gcc-bugs-return-524670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 07:59:05 2016
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Subject: [Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Tue, 10 May 2016 07:59:00 -0000
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--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, so trying to preserve alias-set zero from the BIT_FIELD_REF folding using
a MEM_REF and reference_alias_ptr_type doesn't work as the latter doesn't
preserve the langhook effects (duh, that's some interesting thing on its own).
Leaves the possibility to not doing the BIT_FIELD_REF producing folding if
alias-sets would not agree. The following restores GCC 5 behavior here.
Note Boost still is buggy here.
Index: gcc/fold-const.c
===================================================================
--- gcc/fold-const.c (revision 236032)
+++ gcc/fold-const.c (working copy)
@@ -117,8 +117,6 @@ static enum tree_code compcode_to_compar
static int operand_equal_for_comparison_p (tree, tree, tree);
static int twoval_comparison_p (tree, tree *, tree *, int *);
static tree eval_subst (location_t, tree, tree, tree, tree, tree);
-static tree make_bit_field_ref (location_t, tree, tree,
- HOST_WIDE_INT, HOST_WIDE_INT, int, int);
static tree optimize_bit_field_compare (location_t, enum tree_code,
tree, tree, tree);
static tree decode_field_reference (location_t, tree, HOST_WIDE_INT *,
@@ -3859,7 +3857,9 @@ optimize_bit_field_compare (location_t l
linner = get_inner_reference (lhs, &lbitsize, &lbitpos, &offset, &lmode,
&lunsignedp, &lreversep, &lvolatilep, false);
if (linner == lhs || lbitsize == GET_MODE_BITSIZE (lmode) || lbitsize < 0
- || offset != 0 || TREE_CODE (linner) == PLACEHOLDER_EXPR || lvolatilep)
+ || offset != 0 || TREE_CODE (linner) == PLACEHOLDER_EXPR || lvolatilep
+ /* Make sure we can preserve alias-sets. */
+ || get_alias_set (lhs) != get_alias_set (linner))
return 0;
if (const_p)
@@ -3874,7 +3874,9 @@ optimize_bit_field_compare (location_t l
if (rinner == rhs || lbitpos != rbitpos || lbitsize != rbitsize
|| lunsignedp != runsignedp || lreversep != rreversep || offset != 0
- || TREE_CODE (rinner) == PLACEHOLDER_EXPR || rvolatilep)
+ || TREE_CODE (rinner) == PLACEHOLDER_EXPR || rvolatilep
+ /* Make sure we can preserve alias-sets. */
+ || get_alias_set (rhs) != get_alias_set (rinner))
return 0;
}
@@ -5791,7 +5793,10 @@ fold_truth_andor_1 (location_t loc, enum
|| ll_unsignedp != lr_unsignedp || rl_unsignedp != rr_unsignedp
/* Make sure the two fields on the right
correspond to the left without being swapped. */
- || ll_bitpos - rl_bitpos != lr_bitpos - rr_bitpos)
+ || ll_bitpos - rl_bitpos != lr_bitpos - rr_bitpos
+ /* Make sure we can preserve alias-sets. */
+ || get_alias_set (ll_arg) != get_alias_set (ll_inner)
+ || get_alias_set (lr_arg) != get_alias_set (lr_inner))
return 0;
first_bit = MIN (lr_bitpos, rr_bitpos);
@@ -5921,6 +5926,10 @@ fold_truth_andor_1 (location_t loc, enum
}
}
+ /* Make sure we can preserve alias-sets. */
+ if (get_alias_set (ll_arg) != get_alias_set (ll_inner))
+ return NULL_TREE;
+
/* Construct the expression we will return. First get the component
reference we will make. Unless the mask is all ones the width of
that field, perform the mask operation. Then compare with the
>From gcc-bugs-return-524671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 08:02:26 2016
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Subject: [Bug fortran/70350] [5 Regression] ICE with -fcheck=all and array initialization
Date: Tue, 10 May 2016 08:02:00 -0000
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Lorenz Hüdepohl <bugs at stellardeath dot org> changed:
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----------------------------------------------------------------------------
CC| |bugs at stellardeath dot org
--- Comment #5 from Lorenz Hüdepohl <bugs at stellardeath dot org> ---
I also stumbled upon this, it seems. I can contribute a somewhat smaller test
case, maybe this might help you.
! compile with
! gfortran -fcheck=all
module m
type subtype
real, allocatable :: array(:)
end type subtype
type object
type(subtype), allocatable :: array_of_subtypes(:,:,:)
end type object
contains
subroutine allocate_objects(this)
class(object), intent(inout) :: this
allocate(this%array_of_subtypes(1,2,3))
end subroutine
end module m
I get an ICE on 5.3.1 20160412, but not on 5.3.0 and neither on 6.1.0
>From gcc-bugs-return-524672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 08:15:18 2016
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Subject: [Bug rtl-optimization/67483] combine.c sanitizer detects undefined negative left shift
Date: Tue, 10 May 2016 08:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67483
--- Comment #2 from Vittorio Zecca <zeccav at gmail dot com> ---
Yes I confirm it is in trunk:
../../gcc7/gcc/combine.c:7727:40: runtime error: shift exponent -1 is negative
combine.c:7727 is "& ((((unsigned HOST_WIDE_INT) 1 << count)) - 1)) == 0"
count==-1 ?
>From gcc-bugs-return-524674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 08:21:31 2016
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Subject: [Bug middle-end/28367] accessing via union on a vector does not cause vec_extract to be used
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=28367
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 10 08:20:43 2016
New Revision: 236066
URL: https://gcc.gnu.org/viewcvs?rev=236066&root=gcc&view=rev
Log:
2016-05-10 Richard Biener <rguenther@suse.de>
PR tree-optimization/70497
PR tree-optimization/28367
* tree-ssa-sccvn.c (vn_nary_build_or_lookup): New function
split out from ...
(visit_reference_op_load): ... here.
(vn_reference_lookup_3): Use it to handle subreg-like accesses
with simplified BIT_FIELD_REFs.
* tree-ssa-pre.c (eliminate_insert): Handle inserting BIT_FIELD_REFs.
* tree-complex.c (extract_component): Handle BIT_FIELD_REFs
correctly.
* gcc.dg/torture/20160404-1.c: New testcase.
* gcc.dg/tree-ssa/ssa-fre-54.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-55.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/torture/20160404-1.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-54.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-55.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-complex.c
trunk/gcc/tree-ssa-pre.c
trunk/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-524675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 08:21:31 2016
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Subject: [Bug middle-end/29756] SSE intrinsics hard to use without redundant temporaries appearing
Date: Tue, 10 May 2016 08:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29756
Bug 29756 depends on bug 28367, which changed state.
Bug 28367 Summary: accessing via union on a vector does not cause vec_extract to be used
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=28367
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
>From gcc-bugs-return-524673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 08:21:30 2016
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Subject: [Bug middle-end/28367] accessing via union on a vector does not cause vec_extract to be used
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk.
>From gcc-bugs-return-524677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 08:21:55 2016
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Subject: [Bug tree-optimization/70497] Missed CSE of subregs on GIMPLE
Date: Tue, 10 May 2016 08:21:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug tree-optimization/70497] Missed CSE of subregs on GIMPLE
Date: Tue, 10 May 2016 08:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70497
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 10 08:20:43 2016
New Revision: 236066
URL: https://gcc.gnu.org/viewcvs?rev=236066&root=gcc&view=rev
Log:
2016-05-10 Richard Biener <rguenther@suse.de>
PR tree-optimization/70497
PR tree-optimization/28367
* tree-ssa-sccvn.c (vn_nary_build_or_lookup): New function
split out from ...
(visit_reference_op_load): ... here.
(vn_reference_lookup_3): Use it to handle subreg-like accesses
with simplified BIT_FIELD_REFs.
* tree-ssa-pre.c (eliminate_insert): Handle inserting BIT_FIELD_REFs.
* tree-complex.c (extract_component): Handle BIT_FIELD_REFs
correctly.
* gcc.dg/torture/20160404-1.c: New testcase.
* gcc.dg/tree-ssa/ssa-fre-54.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-55.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/torture/20160404-1.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-54.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-55.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-complex.c
trunk/gcc/tree-ssa-pre.c
trunk/gcc/tree-ssa-sccvn.c
>From gcc-bugs-return-524678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 08:34:35 2016
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Subject: [Bug middle-end/29756] SSE intrinsics hard to use without redundant temporaries appearing
Date: Tue, 10 May 2016 08:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-10
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
So what is missing here is avoiding 'v' for
_26 = BIT_FIELD_REF <v_13(D), 32, 0>;
BIT_FIELD_REF <v, 32, 0> = _26;
v.1_24 = v;
_25 = __builtin_ia32_shufps (v.1_24, v.1_24, 0);
v ={v} {CLOBBER};
which can be done with a new BIT_FIELD_EXPR like so:
v_24 = BIT_FIELD_EXPR <v_n(D), _26, 32, 0>;
>From gcc-bugs-return-524679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 08:51:39 2016
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Subject: [Bug tree-optimization/71039] [7 Regression] ICE: verify_ssa failed (error: definition in block 4 does not dominate use in block 5) w/ -O1 and above
Date: Tue, 10 May 2016 08:51:00 -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 #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine then.
>From gcc-bugs-return-524680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 08:54:42 2016
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Subject: [Bug tree-optimization/71034] abs(f) u>= 0. is always true
Date: Tue, 10 May 2016 08:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71034
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-10
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
abs(x) < 0 is optimized via fold as forwprop still combines comparisons with
def stmts using fold ... :/ (I've not got to instrumenting it catching
missing cases that need to be moved from fold-const.c to match.pd)
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Subject: [Bug rtl-optimization/71028] [7 regression] ICE in redirect_jump, at jump.c:1560
Date: Tue, 10 May 2016 08:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71028
Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/71031] [6/7 Regression] ICE in extract_range_from_binary_expr_1, at tree-vrp.c:2535 w/ -Os
Date: Tue, 10 May 2016 08:57:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-10
Known to work| |5.3.0
Target Milestone|--- |6.2
Summary|[7 Regression] ICE in |[6/7 Regression] ICE in
|extract_range_from_binary_e |extract_range_from_binary_e
|xpr_1, at tree-vrp.c:2535 |xpr_1, at tree-vrp.c:2535
|w/ -Os |w/ -Os
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
#1 0x00000000011690fc in extract_range_from_binary_expr_1 (vr=0x7fffffffd8b0,
code=PLUS_EXPR, expr_type=<integer_type 0x7ffff688b888 unsigned int>,
vr0_=0x7fffffffd790, vr1_=0x7fffffffd7b0)
at /space/rguenther/src/svn/trunk3/gcc/tree-vrp.c:2534
2534 gcc_assert ((min_ovf == -1 && max_ovf == 0)
(gdb) l
2529 {
2530 /* Min underflow or max overflow. The range kind
2531 changes to VR_ANTI_RANGE. */
2532 bool covers = false;
2533 wide_int tem = tmin;
2534 gcc_assert ((min_ovf == -1 && max_ovf == 0)
2535 || (max_ovf == 1 && min_ovf == 0));
2536 type = VR_ANTI_RANGE;
2537 tmin = tmax + 1;
2538 if (wi::cmp (tmin, tmax, sgn) < 0)
(gdb) p min_ovf
$1 = 1
(gdb) p max_ovf
$2 = 0
also ICEs on the GCC 6 branch.
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Subject: [Bug tree-optimization/71026] Missing division optimizations
Date: Tue, 10 May 2016 09:00:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Note the precision changes for all of them are different than
the current transform so careful evaluation needs to be done.
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Subject: [Bug tree-optimization/71031] [6/7 Regression] ICE in extract_range_from_binary_expr_1, at tree-vrp.c:2535 w/ -Os
Date: Tue, 10 May 2016 09:05:00 -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 #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r231098.
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Subject: [Bug target/71041] New: mIPS:
Date: Tue, 10 May 2016 09:06:00 -0000
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/70955] [6/7 Regression] Wrong code generation for __builtin_ms_va_list with -flto
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--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
The patch hints at type merging not being performed properly. AFAIR I saw
that for some of the eventually late built "global" types in the backend:
/* Calling abi specific va_list type nodes. */
static GTY(()) tree sysv_va_list_type_node;
static GTY(()) tree ms_va_list_type_node;
those are not streamed by-index and thus while cross-TU merging will produce
exactly _one_ ms_va_list_type_node the one created by the backend for lto1
is _not_ merged with the one coming from the input TUs.
And type "sharing" in the middle-end is broken by the explicit call
to build_variant_type_copy in
/* Setup the builtin va_list data type and for 64-bit the additional
calling convention specific va_list data types. */
static tree
ix86_build_builtin_va_list (void)
{
if (TARGET_64BIT)
{
/* Initialize ABI specific va_list builtin types. */
tree sysv_va_list, ms_va_list;
sysv_va_list = ix86_build_builtin_va_list_64 ();
sysv_va_list_type_node = build_variant_type_copy (sysv_va_list);
/* For MS_ABI we use plain pointer to argument area. */
ms_va_list = build_pointer_type (char_type_node);
ms_va_list_type_node = build_variant_type_copy (ms_va_list);
return (ix86_abi == MS_ABI) ? ms_va_list : sysv_va_list;
because just having a char * pointer would otherwise be matching too
many "random" pointers?
Anyway, dispatching based on the type given the above "non-difference"
is not going to work reliably.
LTO type merging will have merged the incoming TUs ms_va_list_type_node
with char_type_node. I suggest to differentiate the type by
attaching an attribute, say, do the equivalent of
typedef char *ms_va_list_type_node __attribute__((ms_va_list_type));
or similar.
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Subject: [Bug rtl-optimization/71022] GCC prefers register moves over move immediate
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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> ---
IRA might choose to do this as part of life-range splitting/shortening. Note
that reg-reg moves may be cheaper code-size wise (like on CISC archs with
non-fixed insn lengths). RTL cost should tell you, of course.
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Subject: [Bug tree-optimization/71031] [6/7 Regression] ICE in extract_range_from_binary_expr_1, at tree-vrp.c:2535 w/ -Os
Date: Tue, 10 May 2016 09:16:00 -0000
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I'd like to give this a try.
>From gcc-bugs-return-524689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 09:56:51 2016
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From: "chengniansun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70964] [7 Regression] internal compiler error: in single_succ_edge, at basic-block.h:351
Date: Tue, 10 May 2016 09:56:00 -0000
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Chengnian Sun <chengniansun at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #4 from Chengnian Sun <chengniansun at gmail dot com> ---
(In reply to ktkachov from comment #3)
> Another testcase that started ICEing with r235842.
>
> int a, b;
> int
> fn1 (int p1)
> {
> return p1 < 0 ? p1 : a;
> }
>
> void
> fn2 ()
> {
> lbl_100:
> b = 1;
> for (; b != 21; b = fn1 (b))
> ;
> goto lbl_100;
> }
>
> with -Ofast with a different backtrace:
> ice.c:9:1: internal compiler error: in combine_blocks, at tree-if-conv.c:2219
> fn2 ()
> ^~~
> 0xb49a15 combine_blocks
> $SRC/gcc/tree-if-conv.c:2219
> 0xb4b17b tree_if_conversion
> $SRC/gcc/tree-if-conv.c:2741
> 0xb4b17b execute
> $SRC/gcc/tree-if-conv.c:2829
> 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.
Hi,
May I know how did you find this bug-triggering test case? Is it generated by
some program generator or from the torture test suite?
Thank you.
>From gcc-bugs-return-524690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 09:58:10 2016
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/71042] New: libtsan requires __pointer_chk_guard@GLIBC_PRIVATE (6)
Date: Tue, 10 May 2016 09:58:00 -0000
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Bug ID: 71042
Summary: libtsan requires __pointer_chk_guard@GLIBC_PRIVATE (6)
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
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
Target Milestone: ---
Target: aarch64-linux
This makes it rpm-uninstallable for SUSE at least as we filter out
GLIBC_PRIVATE
symbols from glibc provides.
>From gcc-bugs-return-524691-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 10:00:48 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70964] [7 Regression] internal compiler error: in single_succ_edge, at basic-block.h:351
Date: Tue, 10 May 2016 10:00:00 -0000
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--- Comment #5 from ktkachov at gcc dot gnu.org ---
(In reply to Chengnian Sun from comment #4)
>
> Hi,
>
> May I know how did you find this bug-triggering test case? Is it generated
> by some program generator or from the torture test suite?
>
Hi,
It was auto-generated using csmith and reduced with creduce.
>From gcc-bugs-return-524692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 10:01:40 2016
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From: "dvyukov at google dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/71042] libtsan requires __pointer_chk_guard@GLIBC_PRIVATE (6)
Date: Tue, 10 May 2016 10:01:00 -0000
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Dmitry Vyukov <dvyukov at google dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #1 from Dmitry Vyukov <dvyukov at google dot com> ---
Can we compiler libtsan without stack checks?
>From gcc-bugs-return-524693-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 10:11:14 2016
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From: "andrew.bennett at imgtec dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/71043] New: MIPS: Don't generate multiple lo_sums to access unaligned symbols or fields in packed structures
Date: Tue, 10 May 2016 10:11:00 -0000
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Bug ID: 71043
Summary: MIPS: Don't generate multiple lo_sums to access
unaligned symbols or fields in packed structures
Product: gcc
Version: 6.1.0
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In MIPS (and similarly for other RISC architectures) to load an absolute
address of an object requires a two instruction sequence: one instruction to
load the high part of the object's address, and one instruction to load the low
part of the object's address. Typically the result from the calculation of the
high part of the address will only be used by one instruction to load the low
part of the address. However, when loading or storing double word values, or
accessing fields in a packed structure the the high part of the address can be
used by multiple instructions to load the low parts of an address at different
offsets. Lets show this with an example C program.
struct __attribute__((packed))
{
short s;
unsigned long long l;
} h;
void foo (void)
{
h.l = 0;
}
When this is compiled for MIPS it produces the following assembly:
lui $2,%hi(h)
addiu $4,$2,%lo(h+2)
addiu $3,$2,%lo(h+6)
swl $0,3($4)
swr $0,%lo(h+2)($2)
swl $0,3($3)
jr $31
swr $0,%lo(h+6)($2)
...
.globl h
.section .bss,"aw",@nobits
.align 2
.type h, @object
.size h, 10
h:
.space 10
The high part of the address of object h is loaded into register $2, and this
is then used as part of the low part calculation by two the addiu/swr
instructions which each have different offsets. In MIPS the value of a low
part calculation is treated as a signed value. It is therefore valid to use the
result of a high part calculation with multiple low part calculations
containing different offsets so long as when adding the result of the high part
to the each of the sign extended low parts we get valid addresses.
Unfortunately in this testcase we have low part calculations which add an
offset of 6 to the address of the h structure which is greater than its
alignment. This will cause invalid address to be calculated in certain
situations.
To explain why lets show how this example will be linked if it is built using
the O32 ABI. Here when the MIPS linker resolves a HI relocation (i.e. %hi(h))
it finds the next LO relocation (i.e. %lo(h+2)) in the relocation table and
using the information from both of these relocations it computes the object's
address and extracts its high part. Then, when the MIPS linker resolves a LO
relocation it adds the offset to the object's address and then extracts the low
part.
Lets assume that object h has an address of 0x80007ffc. When the MIPS linker
resolves the value of the HI relocation for object h, it will also use the
value of the LO relocation for object h with an offset of 2. The high part
value is therefore:
HIGH (0x80007ffc + 2) = HIGH (0x80007ffe) = 0x8000
Then the MIPS linker resolves the value of LO relocation for object h with an
offset of 2:
LO (0x80007ffc + 2) = LO (0x80007ffe) = 0x7ffe
Finally the MIPS linker resolves the value of the LO relocation for object h
with an offset of 6:
LO (0x80007ffc + 6) = LO (0x80008002) = 0x8002
In MIPS the value of a LO relocation is treated as a signed value, so when the
program is run the address of h+6 will be 0x7fff8002 when it should be
0x80008002.
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/71042] libtsan requires __pointer_chk_guard@GLIBC_PRIVATE (6)
Date: Tue, 10 May 2016 10:15:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The symbol is provided by ld-linux-aarch64.so
>From gcc-bugs-return-524695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 10:23:03 2016
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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/70255] change of the order of summation of floating point numbers despite no-associative-math
Date: Tue, 10 May 2016 10:23:00 -0000
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--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue May 10 10:22:16 2016
New Revision: 236071
URL: https://gcc.gnu.org/viewcvs?rev=236071&root=gcc&view=rev
Log:
PR c/70255
* c-decl.c (diagnose_mismatched_decls): Warn for optimize attribute
on a declaration following the definition.
* gcc.dg/attr-opt-1.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/attr-opt-1.c
Modified:
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/71041] mIPS:
Date: Tue, 10 May 2016 10:26:00 -0000
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #1 from ktkachov at gcc dot gnu.org ---
I don't think MIPS is a bug ;)
>From gcc-bugs-return-524697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 10:29:00 2016
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Subject: [Bug c/70255] change of the order of summation of floating point numbers despite no-associative-math
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #11 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I added the warning, so closing as fixed.
>From gcc-bugs-return-524698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 10:30:08 2016
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From: "wdijkstr at arm dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/71022] GCC prefers register moves over move immediate
Date: Tue, 10 May 2016 10:30:00 -0000
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--- Comment #2 from Wilco <wdijkstr at arm dot com> ---
(In reply to Richard Biener from comment #1)
> IRA might choose to do this as part of life-range splitting/shortening. Note
> that reg-reg moves may be cheaper code-size wise (like on CISC archs with
> non-fixed insn lengths). RTL cost should tell you, of course.
The cases I spotted are typically conflicting liveranges that just happen to
share the same initialization value (0 being the most common). This
transformation can be done in a generic phase using RTL costs, the moves even
have the correct regnotes.
>From gcc-bugs-return-524699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 10:31:59 2016
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Subject: [Bug fortran/70350] [5 Regression] ICE with -fcheck=all and array initialization
Date: Tue, 10 May 2016 10:31:00 -0000
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max <maximilien.levesque at gmail dot com> changed:
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CC| |maximilien.levesque at gmail dot c
| |om
--- Comment #6 from max <maximilien.levesque at gmail dot com> ---
I confirm on 5.3.1 20160413
A very small contribution (In reply to Lorenz Hüdepohl from comment #5) to make
the example self-sufficient:
! compile with
! gfortran -fcheck=all
program m
type subtype
real, allocatable :: array(:)
end type subtype
type object
type(subtype), allocatable :: array_of_subtypes(:,:,:)
end type object
contains
subroutine allocate_objects(this)
class(object), intent(inout) :: this
allocate(this%array_of_subtypes(1,2,3))
end subroutine
end program m
>From gcc-bugs-return-524700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 10:40:12 2016
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From: "shatz at dsit dot co.il" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/70255] change of the order of summation of floating point numbers despite no-associative-math
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--- Comment #12 from shatz at dsit dot co.il ---
(In reply to Marek Polacek from comment #11)
> I added the warning, so closing as fixed.
Warning is nice, but IMHO it is far more important to document the behavior in
online documentation, including docs for older versions.
In fact, if there will be a proper documentation in place, a warning is not so
necessary.
>From gcc-bugs-return-524701-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 10:44:55 2016
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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/70255] change of the order of summation of floating point numbers despite no-associative-math
Date: Tue, 10 May 2016 10:44:00 -0000
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--- Comment #13 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
So what exactly is not documented?
And I disagree that a warning isn't necessary just because something is
documented -- that applies for almost any warning.
>From gcc-bugs-return-524702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 11:25:51 2016
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Subject: [Bug libstdc++/71005] recursive_directory_iterator::operator++(int) incorrectly implemented
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue May 10 11:25:06 2016
New Revision: 236072
URL: https://gcc.gnu.org/viewcvs?rev=236072&root=gcc&view=rev
Log:
libstdc++/71005 fix post-increment for filesystem iterators
PR libstdc++/71005
* include/experimental/bits/fs_dir.h (__directory_iterator_proxy):
New type.
(directory_iterator::operator++(int)): Return proxy.
(recursive_directory_iterator::operator++(int)): Likewise.
* testsuite/experimental/filesystem/iterators/directory_iterator.cc:
Test post-increment.
* testsuite/experimental/filesystem/iterators/
recursive_directory_iterator.cc: Likewise.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/experimental/bits/fs_dir.h
trunk/libstdc++-v3/testsuite/experimental/filesystem/iterators/directory_iterator.cc
trunk/libstdc++-v3/testsuite/experimental/filesystem/iterators/recursive_directory_iterator.cc
>From gcc-bugs-return-524703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 11:39:14 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/71044] New: Optimize std::filesystem implementation
Date: Tue, 10 May 2016 11:39:00 -0000
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Bug ID: 71044
Summary: Optimize std::filesystem implementation
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Before the code is moved from std::experimental::filesystem to std::filesystem
(and into the shared library) there are a few improvements that should be made.
http://wg21.link/lwg2674 relaxes requirements on path::iterator so that a path
is no longer required to embed a container of paths. The components could be
stored as string_view objects, and only converted to path objects as needed
(generally that means when a path::iterator is dereferenced).
Parsing and splitting a path into components could be done lazily, so that it
isn't done for intermediate temporary copies of a path, only the final value
that is manipulated. Move semantics might mean this is unnecessary, since
performance-sensitive code can usually move values instead of copying them.
Directory iterators currently construct a path object on every increment. This
means that incrementing a directory iterator five times then dereferencing it
constructs five paths which are never used (and each one is eagerly split into
components, allocating a container of paths!). Construction of the path could
be postponed so that it's only done on dereference, so that the five increments
are cheap. This has thread-safety consequences, as the dereference is a const
operation and could be performed concurrently, so the lazy construction of the
path needs to be synchronized.
>From gcc-bugs-return-524704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 11:42:56 2016
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Subject: [Bug libstdc++/71044] Optimize std::filesystem implementation
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 38461
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38461&action=edit
Make directory iterators lazy
(In reply to Jonathan Wakely from comment #0)
> Directory iterators currently construct a path object on every increment.
> This means that incrementing a directory iterator five times then
> dereferencing it constructs five paths which are never used (and each one is
> eagerly split into components, allocating a container of paths!).
> Construction of the path could be postponed so that it's only done on
> dereference, so that the five increments are cheap. This has thread-safety
> consequences, as the dereference is a const operation and could be performed
> concurrently, so the lazy construction of the path needs to be synchronized.
As in the attached patch.
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Subject: [Bug c++/70755] [ARM] excessive struct alignment for globals
Date: Tue, 10 May 2016 12:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70755
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|RESOLVED |NEW
Last reconfirmed| |2016-05-10
Resolution|WONTFIX |---
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Having given this some thought, there is perhaps a worthwhile enhancement
opportunity here. We should probably add some options similar to those used in
the CHRIS port that allow users to turn off over-alignment.
-mstack-align
-mno-stack-align
-mdata-align
-mno-data-align
-mconst-align
-mno-const-align
I would expect the -m<type>-align options to remain the default setting,
however.
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From: "olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/71045] New: [SH] gcc.dg/torture/pr68264.c -O0 and -Os failures
Date: Tue, 10 May 2016 12:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71045
Bug ID: 71045
Summary: [SH] gcc.dg/torture/pr68264.c -O0 and -Os failures
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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CC: kkojima at gcc dot gnu.org
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Target: sh*-*-*
The gcc.dg/torture/pr68264.c test case has been failing since a while. It
started somewhere during GCC 6 ...
https://gcc.gnu.org/ml/gcc-testresults/2016-04/msg01595.html
Kaz, do you know what's going wrong there? Some silent wrong code related to
fenv maybe?
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug gcov-profile/71046] New: gcov time hog
Date: Tue, 10 May 2016 12:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71046
Bug ID: 71046
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struct A
{
char a1, a2, a3, a4, a5, a6, a7, a8, a9;
char b1, b2, b3, b4, b5, b6, b7, b8, b9;
char c1, c2, c3, c4, c5;
};
struct A s;
int
main ()
{
if (__builtin_expect (s.a1 < 0 || s.a1 > 200 || s.a2 < 0 || s.a2 > 200
|| s.a3 < 0 || s.a3 > 200 || s.a4 < 0 || s.a4 > 200
|| s.a5 < 0 || s.a5 > 200 || s.a6 < 0 || s.a6 > 200
|| s.a7 < 0 || s.a7 > 200 || s.a8 < 0 || s.a8 > 200
|| s.a9 < 0 || s.a9 > 200 || s.b1 < 0 || s.b1 > 200
|| s.b2 < 0 || s.b2 > 200 || s.b3 < 0 || s.b3 > 200
|| s.b4 < 0 || s.b4 > 200 || s.b5 < 0 || s.b5 > 200
|| s.b6 < 0 || s.b6 > 200 || s.b7 < 0 || s.b7 > 200
|| s.b8 < 0 || s.b8 > 200 || s.b9 < 0 || s.b9 > 200
|| s.c1 < 0 || s.c1 > 200 || s.c2 < 0 || s.c2 > 200
|| s.c3 < 0 || s.c3 > 200 || s.c4 < 0 || s.c4 > 200
|| s.c5 < 0 || s.c5 > 200, 0))
__builtin_printf ("hello\n");
return 0;
}
(reduced from Linux kernel) with
gcc -O2 -fprofile-arcs -ftest-coverage test.c
./a.out
gcov -b -c -d -a test.gcda
gets stuck in accumulate_line_counts until killed.
There are no loops in the testcase, all bbs have at most 2 successors, one bb
has 23 predecessors, most others have just one.
The comment in accumulate_line_counts says:
/* Find the loops. This uses the algorithm described in
Tiernan 'An Efficient Search Algorithm to Find the
Elementary Circuits of a Graph', CACM Dec 1970. We hold
the P array by having each block point to the arc that
connects to the previous block. The H array is implicitly
held because of the arc ordering, and the block's
previous arc pointer.
Although the algorithm is O(N^3) for highly connected
graphs, at worst we'll have O(N^2), as most blocks have
only one or two exits. Most graphs will be small.
For each loop we find, locate the arc with the smallest
transition count, and add that to the cumulative
count. Decrease flow over the cycle and remove the arc
from consideration. */
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Subject: [Bug c/70255] change of the order of summation of floating point numbers despite no-associative-math
Date: Tue, 10 May 2016 12:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70255
--- Comment #14 from shatz at dsit dot co.il ---
(In reply to Marek Polacek from comment #13)
> So what exactly is not documented?
>
> And I disagree that a warning isn't necessary just because something is
> documented -- that applies for almost any warning.
It is not documented that __attribute__((optimize(""))) works reliably when it
is present in the source before the function body, but is ignored (always?
occasionally?) when it specified after function body.
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Subject: [Bug libstdc++/71037] Exceptions thrown from "filesystem::canonical(...)" should contain both paths.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-10
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Target Milestone|--- |5.4
Ever confirmed|0 |1
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Subject: [Bug libstdc++/71037] Exceptions thrown from "filesystem::canonical(...)" should contain both paths.
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue May 10 12:22:32 2016
New Revision: 236074
URL: https://gcc.gnu.org/viewcvs?rev=236074&root=gcc&view=rev
Log:
libstdc++/71037 Add base path to filesystem::canonical exceptions
PR libstdc++/71037
* src/filesystem/ops.cc (canonical(const path&, const path&)): Add
base path to exception.
* testsuite/experimental/filesystem/operations/canonical.cc: Test
paths contained in exception.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/filesystem/ops.cc
trunk/libstdc++-v3/testsuite/experimental/filesystem/operations/canonical.cc
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Subject: [Bug gcov-profile/67992] GCOV takes an absurdly long time to process a file
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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> ---
*** Bug 71046 has been marked as a duplicate of this bug. ***
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Subject: [Bug gcov-profile/71046] gcov time hog
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71046
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Oops, sorry, this is already filed.
*** This bug has been marked as a duplicate of bug 67992 ***
>From gcc-bugs-return-524714-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 12:25:26 2016
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Subject: [Bug gcov-profile/67992] GCOV takes an absurdly long time to process a file
Date: Tue, 10 May 2016 12:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67992
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Shorter testcase:
struct A
{
char a1, a2, a3, a4, a5, a6, a7, a8, a9;
char b1, b2, b3, b4, b5, b6, b7, b8, b9;
char c1, c2, c3, c4, c5;
};
struct A s;
int
main ()
{
if (__builtin_expect (s.a1 < 0 || s.a1 > 200 || s.a2 < 0 || s.a2 > 200
|| s.a3 < 0 || s.a3 > 200 || s.a4 < 0 || s.a4 > 200
|| s.a5 < 0 || s.a5 > 200 || s.a6 < 0 || s.a6 > 200
|| s.a7 < 0 || s.a7 > 200 || s.a8 < 0 || s.a8 > 200
|| s.a9 < 0 || s.a9 > 200 || s.b1 < 0 || s.b1 > 200
|| s.b2 < 0 || s.b2 > 200 || s.b3 < 0 || s.b3 > 200
|| s.b4 < 0 || s.b4 > 200 || s.b5 < 0 || s.b5 > 200
|| s.b6 < 0 || s.b6 > 200 || s.b7 < 0 || s.b7 > 200
|| s.b8 < 0 || s.b8 > 200 || s.b9 < 0 || s.b9 > 200
|| s.c1 < 0 || s.c1 > 200 || s.c2 < 0 || s.c2 > 200
|| s.c3 < 0 || s.c3 > 200 || s.c4 < 0 || s.c4 > 200
|| s.c5 < 0 || s.c5 > 200, 0))
__builtin_printf ("hello\n");
return 0;
}
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Subject: [Bug libstdc++/71036] create_directory(p, ...) reports a failure when 'p' is an existing directory
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-10
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Ever confirmed|0 |1
>From gcc-bugs-return-524715-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 12:52:48 2016
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Subject: [Bug target/71045] [SH] gcc.dg/torture/pr68264.c -O0 and -Os failures
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--- Comment #1 from Kazumoto Kojima <kkojima at gcc dot gnu.org> ---
(In reply to Oleg Endo from comment #0)
> Kaz, do you know what's going wrong there? Some silent wrong code related
> to fenv maybe?
Maybe, though I have no idea for what is going on.
You can see that those tests fail on several other targets:
powerpc-ibm-aix7.1.0.0
https://gcc.gnu.org/ml/gcc-testresults/2016-05/msg00925.html
x86_64-unknown-freebsd9.3
https://gcc.gnu.org/ml/gcc-testresults/2016-05/msg00932.html
i386-unknown-freebsd10.3
https://gcc.gnu.org/ml/gcc-testresults/2016-05/msg00919.html
>From gcc-bugs-return-524716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 12:56:12 2016
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/68945] enable libcilkrts on SPARC
Date: Tue, 10 May 2016 12:56:00 -0000
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--- Comment #12 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #11 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
[...]
>> * One thing I wonder about is runtime/config/sparc/os-fence.h: when using
>> __sync_synchronize, gcc emits membar #StoreLoad, while Stefan's patch had
>> membar #LoadLoad | #LoadStore | #StoreStore | #StoreLoad. It seems that
>> all but #StoreLoad are no-ops for TSO SPARC CPUs, but I'd better get this
>> right.
>
> __sync_synchronize emits the minimum memory barrier for the memory model, which
> is TSO on Solaris so only #StoreLoad is needed. The 4 flags are needed for RMO
> theoretically, but I'm not sure RMO ever existed in real life.
Ok, so I'll keep the __sync_synchronize and inline asm versions in sync
and submit the result upstream.
Thanks.
Rainer
>From gcc-bugs-return-524717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 12:56:39 2016
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Subject: [Bug tree-optimization/70986] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in combine_blocks, at tree-if-conv.c:2219
Date: Tue, 10 May 2016 12:56:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
The following fixes it for me, making sure the loop is rejected early by
if-conversion.
Index: gcc/cfganal.c
===================================================================
--- gcc/cfganal.c (revision 236066)
+++ gcc/cfganal.c (working copy)
@@ -26,6 +26,7 @@ along with GCC; see the file COPYING3.
#include "cfghooks.h"
#include "timevar.h"
#include "cfganal.h"
+#include "cfgloop.h"
/* Store the data structures necessary for depth-first search. */
struct depth_first_search_ds {
@@ -602,7 +603,10 @@ connect_infinite_loops_to_exit (void)
break;
deadend_block = dfs_find_deadend (unvisited_block);
- make_edge (deadend_block, EXIT_BLOCK_PTR_FOR_FN (cfun), EDGE_FAKE);
+ edge e = make_edge (deadend_block, EXIT_BLOCK_PTR_FOR_FN (cfun),
+ EDGE_FAKE);
+ if (current_loops != NULL)
+ rescan_loop_exit (e, true, false);
flow_dfs_compute_reverse_add_bb (&dfs_ds, deadend_block);
}
>From gcc-bugs-return-524718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 12:58:16 2016
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Subject: [Bug target/71045] [SH] gcc.dg/torture/pr68264.c -O0 and -Os failures
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--- Comment #2 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Kazumoto Kojima from comment #1)
> (In reply to Oleg Endo from comment #0)
> > Kaz, do you know what's going wrong there? Some silent wrong code related
> > to fenv maybe?
>
> Maybe, though I have no idea for what is going on.
> You can see that those tests fail on several other targets:
>
> powerpc-ibm-aix7.1.0.0
> https://gcc.gnu.org/ml/gcc-testresults/2016-05/msg00925.html
> x86_64-unknown-freebsd9.3
> https://gcc.gnu.org/ml/gcc-testresults/2016-05/msg00932.html
> i386-unknown-freebsd10.3
> https://gcc.gnu.org/ml/gcc-testresults/2016-05/msg00919.html
Oh, good to know. Thanks for checking. Probably we can close this PR as
"invalid" after a while...
>From gcc-bugs-return-524719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 13:05:07 2016
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Subject: [Bug libstdc++/71036] create_directory(p, ...) reports a failure when 'p' is an existing directory
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue May 10 13:04:21 2016
New Revision: 236076
URL: https://gcc.gnu.org/viewcvs?rev=236076&root=gcc&view=rev
Log:
libstdc++/71036 Handle EEXIST in filesystem::create_directory
PR libstdc++/71036
* src/filesystem/ops.cc (create_dir): Handle EEXIST from mkdir.
* testsuite/experimental/filesystem/operations/create_directory.cc:
New test.
Added:
trunk/libstdc++-v3/testsuite/experimental/filesystem/operations/create_directory.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/filesystem/ops.cc
>From gcc-bugs-return-524720-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 13:14:45 2016
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Subject: [Bug tree-optimization/71039] [7 Regression] ICE: verify_ssa failed (error: definition in block 4 does not dominate use in block 5) w/ -O1 and above
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 10 13:13:59 2016
New Revision: 236079
URL: https://gcc.gnu.org/viewcvs?rev=236079&root=gcc&view=rev
Log:
2016-05-10 Richard Biener <rguenther@suse.de>
PR tree-optimization/71039
* tree-ssa-phiprop.c: Include tree-ssa-loop.h.
(chk_uses): New function.
(propagate_with_phi): Verify we can safely replicate the lhs of an
aggregate assignment on all incoming edges.
* gcc.dg/torture/pr71039.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr71039.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-phiprop.c
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Subject: [Bug tree-optimization/70986] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in combine_blocks, at tree-if-conv.c:2219
Date: Tue, 10 May 2016 13:17:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug tree-optimization/71039] [7 Regression] ICE: verify_ssa failed (error: definition in block 4 does not dominate use in block 5) w/ -O1 and above
Date: Tue, 10 May 2016 13:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug fortran/71047] New: Allocatable component of INTENT(OUT) dummy not set correctly
Date: Tue, 10 May 2016 13:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71047
Bug ID: 71047
Summary: Allocatable component of INTENT(OUT) dummy not set
correctly
Product: gcc
Version: 7.0
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When compiled with gfortran, the attached code, which is correct as
far as I can tell, produces an error at runtime:
$ ./test
At line 20 of file test.f90
Fortran runtime error: Attempting to allocate already allocated variable 'y'
$ gfortran --version
GNU Fortran (GCC) 7.0.0 20160510 (experimental)
Notice that the dummy argument "y" of "set" has intent(out), so that
its component "f" can not be allocated regardless of the state of the
actual argument.
I think that the code was working with an older version of the
gfortran trunk (some weeks ago?) - or, at least, the code I derived
this example from was working correctly.
module m
implicit none
type, abstract :: c_abstr
integer :: i = 0
end type c_abstr
type, extends(c_abstr) :: t_a
class(c_abstr), allocatable :: f
end type t_a
type, extends(c_abstr) :: t_b
end type t_b
contains
subroutine set(y,x)
class(c_abstr), intent(in) :: x
type(t_a), intent(out) :: y
allocate( y%f , source=x )
end subroutine set
end module m
program p
use m
implicit none
type(t_a) :: res
type(t_b) :: var
call set( res , var )
write(*,*) res%i
end program p
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Subject: [Bug middle-end/71002] [6/7 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Tue, 10 May 2016 13:26:00 -0000
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--- Comment #11 from Tavian Barnes <tavianator at gmail dot com> ---
Yeah I reported the Boost bug as https://svn.boost.org/trac/boost/ticket/12183.
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Subject: [Bug c/71048] New: unexpected/invalid handling of partially aligned volatile
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71048
Bug ID: 71048
Summary: unexpected/invalid handling of partially aligned
volatile
Product: gcc
Version: 5.3.1
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Created attachment 38462
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38462&action=edit
minimal test code
When dereferencing volatile pointer that is half-word aligned (and gcc can
infer it):
- two half-word accesses are used
- memory location is read too
Test code:
#define BTABLE (*(uint32_t*)100)
*(volatile uint32_t*)(BTABLE * 2) = 101;
generated assembly:
movs r3, #100 @ tmp114,
ldr r3, [r3] @ MEM[(uint32_t *)100B], MEM[(uint32_t *)100B]
movs r0, #0 @ tmp117,
lsls r3, r3, #1 @ D.4231, MEM[(uint32_t *)100B],
ldrh r2, [r3] @, *_4
movs r2, #101 @ tmp119,
strh r2, [r3] @ movhi @ tmp119, *_4
ldrh r2, [r3, #2] @, *_4
strh r0, [r3, #2] @ movhi @ tmp117, *_4
- memory is written using strh instruction on architecture that allows
non-aligned access. This is not a bug, but is very confusing.
- unexpected read instruction (ldrh) is emitted before read
- access is read(lower halfword) / write(lower halfword) / read(upper halfword)
/ write(upper halfword)
When dereferencing (BTABLE * 1), (BTABLE * 3), (BTABLE * 4), (BTABLE * 11),
((BTABLE * 2) & ~3) the generated code is reasonable (using single ldr
instruction, only reading memory location):
*(volatile uint32_t*)(BTABLE) = 101;
movs r3, #100 @ tmp113,
ldr r3, [r3] @ D.4230, MEM[(uint32_t *)100B]
movs r2, #101 @ tmp114,
str r2, [r3] @ tmp114, *_3
movs r0, #0 @,
With (BTABLE * 6), mul instruction is used to get correct address, then read is
identical to (BTABLE * 2) case.
t1.c:
#include <stdint.h>
#define BTABLE (*(uint32_t*)100)
int test(void)
{
*(volatile uint32_t*)((BTABLE * 2)) = 101;
return 0;
}
void _start(void) {
test();
}
command to compile:
arm-none-eabi-gcc -nostartfiles -mthumb -mcpu=cortex-m3 -Os -ffat-lto-objects
-fverbose-asm -S t1.c
Affected version (from
https://launchpad.net/gcc-arm-embedded/5.0/5-2016-q1-update/+download/gcc-arm-none-eabi-5_3-2016q1-20160330-linux.tar.bz2):
arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/home/ledvinap/gcc-arm-none-eabi-5_3-2016q1/bin/../lib/gcc/arm-none-eabi/5.3.1/lto-wrapper
Target: arm-none-eabi
Configured with: /home/build/work/GCC-5-0-build/src/gcc/configure
--target=arm-none-eabi --prefix=/home/build/work/GCC-5-0-build/install-native
--libexecdir=/home/build/work/GCC-5-0-build/install-native/lib
--infodir=/home/build/work/GCC-5-0-build/install-native/share/doc/gcc-arm-none-eabi/info
--mandir=/home/build/work/GCC-5-0-build/install-native/share/doc/gcc-arm-none-eabi/man
--htmldir=/home/build/work/GCC-5-0-build/install-native/share/doc/gcc-arm-none-eabi/html
--pdfdir=/home/build/work/GCC-5-0-build/install-native/share/doc/gcc-arm-none-eabi/pdf
--enable-languages=c,c++ --enable-plugins --disable-decimal-float
--disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath
--disable-libssp --disable-libstdcxx-pch --disable-nls --disable-shared
--disable-threads --disable-tls --with-gnu-as --with-gnu-ld --with-newlib
--with-headers=yes --with-python-dir=share/gcc-arm-none-eabi
--with-sysroot=/home/build/work/GCC-5-0-build/install-native/arm-none-eabi
--build=i686-linux-gnu --host=i686-linux-gnu
--with-gmp=/home/build/work/GCC-5-0-build/build-native/host-libs/usr
--with-mpfr=/home/build/work/GCC-5-0-build/build-native/host-libs/usr
--with-mpc=/home/build/work/GCC-5-0-build/build-native/host-libs/usr
--with-isl=/home/build/work/GCC-5-0-build/build-native/host-libs/usr
--with-cloog=/home/build/work/GCC-5-0-build/build-native/host-libs/usr
--with-libelf=/home/build/work/GCC-5-0-build/build-native/host-libs/usr
--with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm'
--with-pkgversion='GNU Tools for ARM Embedded Processors'
--with-multilib-list=armv6-m,armv7-m,armv7e-m,armv7-r,armv8-m.base,armv8-m.main
Thread model: single
gcc version 5.3.1 20160307 (release) [ARM/embedded-5-branch revision 234589]
(GNU Tools for ARM Embedded Processors)
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Subject: [Bug libstdc++/71038] copy_file(...) returns false on successful copy.
Date: Tue, 10 May 2016 13:33:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I can't reproduce this with any version.
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Subject: [Bug libgcc/70720] moxie-rtems stanza does not include crti/crtn extra_parts
Date: Tue, 10 May 2016 14:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70720
--- Comment #2 from Joel Sherrill <joel at gcc dot gnu.org> ---
Sebastian, should this be applied to other branches?
Should the PR be closed?
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Subject: [Bug debug/70935] [6 Regression] ICE: verify_ssa failed (error: definition in block 9 does not dominate use in block 12) w/ -O3 -g
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70935
--- Comment #6 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Author: ienkovich
Date: Tue May 10 14:26:37 2016
New Revision: 236081
URL: https://gcc.gnu.org/viewcvs?rev=236081&root=gcc&view=rev
Log:
gcc/
2016-05-10 Yuri Rumyantsev <ysrumyan@gmail.com>
Backport from mainline r235962.
2016-05-06 Yuri Rumyantsev <ysrumyan@gmail.com>
PR debug/70935
* tree-ssa-loop-unswitch.c (find_loop_guard): Reject guard edge with
loop latch destination.
gcc/testsuite/
2016-05-10 Yuri Rumyantsev <ysrumyan@gmail.com>
Backport from mainline r235962.
2016-05-06 Yuri Rumyantsev <ysrumyan@gmail.com>
PR debug/70935
* gcc.dg/torture/pr70935.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.dg/torture/pr70935.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-ssa-loop-unswitch.c
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Subject: [Bug target/70963] vec_cts/vec_ctf intrinsics produce wrong results for 64-bit floating point
Date: Tue, 10 May 2016 14:27:00 -0000
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--- Comment #6 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Tue May 10 14:27:12 2016
New Revision: 236082
URL: https://gcc.gnu.org/viewcvs?rev=236082&root=gcc&view=rev
Log:
[gcc]
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/70963
* config/rs6000/vsx.md (vsx_xvcvdpsxds_scale): Generate correct
code for a zero scale factor.
(vsx_xvcvdpuxds_scale): Likewise.
[gcc/testsuite]
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/70963
* gcc.target/powerpc/pr70963.c: New.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr70963.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/vsx.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/70927] avx512dq instructions emitted even with -mavx512vl -mno-avx512dq
Date: Tue, 10 May 2016 14:30:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 10 14:30:02 2016
New Revision: 236083
URL: https://gcc.gnu.org/viewcvs?rev=236083&root=gcc&view=rev
Log:
PR target/70927
* config/i386/sse.md (<sse>_andnot<mode>3<mask_name>),
*<code><mode>3<mask_name>): For !TARGET_AVX512DQ and EVEX encoding,
use vp*[dq] instead of v*p[sd] instructions and adjust mode attribute
accordingly.
* gcc.target/i386/avx512vl-logic-1.c: New test.
* gcc.target/i386/avx512vl-logic-2.c: New test.
* gcc.target/i386/avx512dq-logic-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512dq-logic-2.c
trunk/gcc/testsuite/gcc.target/i386/avx512vl-logic-1.c
trunk/gcc/testsuite/gcc.target/i386/avx512vl-logic-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug libstdc++/71038] copy_file(...) returns false on successful copy.
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Subject: [Bug libstdc++/71038] copy_file(...) returns false on successful copy.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71038
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue May 10 15:39:14 2016
New Revision: 236084
URL: https://gcc.gnu.org/viewcvs?rev=236084&root=gcc&view=rev
Log:
libstdc++/71038 fix error checks in filesystem::copy_file
PR libstdc++/71038
* src/filesystem/ops.cc (do_copy_file): Fix backwards conditions.
* testsuite/experimental/filesystem/operations/copy_file.cc: New test.
Added:
trunk/libstdc++-v3/testsuite/experimental/filesystem/operations/copy_file.cc
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/filesystem/ops.cc
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Subject: [Bug libstdc++/71044] Optimize std::filesystem implementation
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 38463
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38463&action=edit
Add assertions to directory iterator functions
Also consider replacing non-inline functions such as
directory_iterator::increment() with inline ones with assertions.
This would allow those functions to check preconditions at runtime, and more
functions could be noexcept.
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Subject: [Bug ada/70786] Missing "not" breaks Ada.Text_IO.Get_Immediate(File, Item, Available)
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--- Comment #8 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Author: ienkovich
Date: Tue May 10 15:56:27 2016
New Revision: 236086
URL: https://gcc.gnu.org/viewcvs?rev=236086&root=gcc&view=rev
Log:
gcc/
PR tree-optimization/70786
* tree-chkp.c (chkp_find_bounds_1): Support WITH_SIZE_EXPR.
* gcc/calls.c (initialize_argument_information): Bind bounds
with corresponding args passed by reference.
gcc/testsuite/
PR tree-optimization/70786
* gcc.target/i386/pr70876.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70876.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/calls.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-chkp.c
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Subject: [Bug testsuite/70227] pr69589 does not check for -rdynamic availability
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70227
Jiong Wang <jiwang at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|arm-none-eabi |arm-none-eabi,
| |spu-unknown-elf
CC| |jiwang at gcc dot gnu.org
--- Comment #2 from Jiong Wang <jiwang at gcc dot gnu.org> ---
I suspect all elf target will fail this except xtensa which has explicitly
-rdynamic support for elf
(https://gcc.gnu.org/ml/gcc-patches/2011-02/msg00567.html).
From gcc test mailing list, at least spu-elf
(https://gcc.gnu.org/ml/gcc-testresults/2016-04/msg02046.html) is failing also.
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Subject: [Bug middle-end/70877] [MPX] ICE in in convert_move
Date: Tue, 10 May 2016 16:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70877
--- Comment #1 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Author: ienkovich
Date: Tue May 10 16:06:36 2016
New Revision: 236088
URL: https://gcc.gnu.org/viewcvs?rev=236088&root=gcc&view=rev
Log:
gcc/
PR middle-end/70877
* tree-chkp.c (chkp_add_bounds_to_call_stmt): Handle
calls with type casted fndecl.
gcc/testsuite/
PR middle-end/70877
* gcc.target/i386/pr70877.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70877.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-chkp.c
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Subject: [Bug target/70963] vec_cts/vec_ctf intrinsics produce wrong results for 64-bit floating point
Date: Tue, 10 May 2016 16:07:00 -0000
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--- Comment #7 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Tue May 10 16:07:04 2016
New Revision: 236089
URL: https://gcc.gnu.org/viewcvs?rev=236089&root=gcc&view=rev
Log:
[gcc]
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/70963
* config/rs6000/vsx.md (vsx_xvcvdpsxds_scale): Generate correct
code for a zero scale factor.
(vsx_xvcvdpuxds_scale): Likewise.
[gcc/testsuite]
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/70963
* gcc.target/powerpc/pr70963.c: New.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.target/powerpc/pr70963.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/config/rs6000/vsx.md
branches/gcc-5-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/70799] STV pass does not convert DImode shifts and rotates
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--- Comment #3 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Author: ienkovich
Date: Tue May 10 16:08:42 2016
New Revision: 236090
URL: https://gcc.gnu.org/viewcvs?rev=236090&root=gcc&view=rev
Log:
gcc/
PR target/70799
* config/i386/i386.c (dimode_scalar_to_vector_candidate_p): Allow
integer constants.
(dimode_scalar_chain::vector_const_cost): New.
(dimode_scalar_chain::compute_convert_gain): Handle constants.
(dimode_scalar_chain::convert_op): Likewise.
(dimode_scalar_chain::convert_insn): Likewise.
gcc/testsuite/
PR target/70799
* gcc.target/i386/pr70799-1.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr70799-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/70963] vec_cts/vec_ctf intrinsics produce wrong results for 64-bit floating point
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--- Comment #8 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Tue May 10 16:09:28 2016
New Revision: 236091
URL: https://gcc.gnu.org/viewcvs?rev=236091&root=gcc&view=rev
Log:
[gcc]
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/70963
* config/rs6000/vsx.md (vsx_xvcvdpsxds_scale): Generate correct
code for a zero scale factor.
(vsx_xvcvdpuxds_scale): Likewise.
[gcc/testsuite]
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/70963
* gcc.target/powerpc/pr70963.c: New.
Added:
branches/gcc-4_9-branch/gcc/testsuite/gcc.target/powerpc/pr70963.c
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/config/rs6000/vsx.md
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
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From: "ktkachov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/70132] ARM -mcpu=native can cause a double free abort.
Date: Tue, 10 May 2016 16:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70132
--- Comment #11 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Tue May 10 16:15:20 2016
New Revision: 236092
URL: https://gcc.gnu.org/viewcvs?rev=236092&root=gcc&view=rev
Log:
[ARM] PR driver/70132: Avoid double fclose in driver-arm.c
Backport from mainline
2016-03-23 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR driver/70132
* config/arm/driver-arm.c (host_detect_local_cpu): Reorder exit logic
to not call fclose twice on file.
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/config/arm/driver-arm.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/70132] ARM -mcpu=native can cause a double free abort.
Date: Tue, 10 May 2016 16:17:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #12 from ktkachov at gcc dot gnu.org ---
Fixed on all active branches.
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From: "amker at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/68030] Redundant address calculations in vectorized loop
Date: Tue, 10 May 2016 16:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68030
--- Comment #6 from amker at gcc dot gnu.org ---
It's not only the vectorizer generating CSE sub-optimal code, pre and lim also
do this kind of transform.
Compiling the attached example with below command line
$ ./gcc -S -Ofast -march=haswell pr68030.c -o pr68030.S
-fdump-tree-vect-details -fdump-tree-slp -fdump-tree-ivopts-details
-fdump-tree-all -fno-tree-vectorize
Gives below dump info before IVOPT:
<bb 2>:
local_Filter_33 = global_Filters;
pretmp_887 = global_Output;
pretmp_889 = global_Input;
goto <bb 7>;
<bb 3>:
<bb 4>:
# ix_187 = PHI <_202(3), 2(7)>
# ivtmp_1065 = PHI <ivtmp_1064(3), 512(7)>
_154 = ix_187 + -2;
_157 = _154 + _971;
_158 = (long unsigned int) _157;
_159 = _158 * 4;
_160 = pretmp_889 + _159;
_161 = *_160;
_165 = *local_Filter_33;
_166 = _161 * _165;
_170 = ix_187 + -1;
_173 = _170 + _971;
_174 = (long unsigned int) _173;
_175 = _174 * 4;
_176 = pretmp_889 + _175;
_177 = *_176;
_181 = MEM[(float *)local_Filter_33 + 4B];
_182 = _177 * _181;
_81 = _166 + _182;
_189 = ix_187 + _971;
_190 = (long unsigned int) _189;
_191 = _190 * 4;
_192 = pretmp_889 + _191;
_193 = *_192;
_197 = MEM[(float *)local_Filter_33 + 8B];
_198 = _193 * _197;
_202 = ix_187 + 1;
_205 = _202 + _971;
_206 = (long unsigned int) _205;
_207 = _206 * 4;
_208 = pretmp_889 + _207;
_209 = *_208;
_213 = MEM[(float *)local_Filter_33 + 12B];
_214 = _209 * _213;
_218 = ix_187 + 2;
_221 = _218 + _971;
_222 = (long unsigned int) _221;
_223 = _222 * 4;
_224 = pretmp_889 + _223;
_225 = *_224;
_229 = MEM[(float *)local_Filter_33 + 16B];
_230 = _225 * _229;
_82 = _214 + _230;
_67 = _81 + _82;
_243 = _154 + _980;
_244 = (long unsigned int) _243;
_245 = _244 * 4;
_246 = pretmp_889 + _245;
_247 = *_246;
_251 = MEM[(float *)local_Filter_33 + 20B];
_252 = _247 * _251;
_259 = _170 + _980;
_260 = (long unsigned int) _259;
_261 = _260 * 4;
_262 = pretmp_889 + _261;
_263 = *_262;
_267 = MEM[(float *)local_Filter_33 + 24B];
_268 = _263 * _267;
_78 = _252 + _268;
_275 = ix_187 + _980;
_276 = (long unsigned int) _275;
_277 = _276 * 4;
_278 = pretmp_889 + _277;
_279 = *_278;
_283 = MEM[(float *)local_Filter_33 + 28B];
_284 = _279 * _283;
_72 = _198 + _284;
_291 = _202 + _980;
_292 = (long unsigned int) _291;
_293 = _292 * 4;
_294 = pretmp_889 + _293;
_295 = *_294;
_299 = MEM[(float *)local_Filter_33 + 32B];
_300 = _295 * _299;
_307 = _218 + _980;
_308 = (long unsigned int) _307;
_309 = _308 * 4;
_310 = pretmp_889 + _309;
_311 = *_310;
_315 = MEM[(float *)local_Filter_33 + 36B];
_316 = _311 * _315;
_79 = _300 + _316;
_56 = _78 + _79;
_329 = _154 + _985;
_330 = (long unsigned int) _329;
_331 = _330 * 4;
_332 = pretmp_889 + _331;
_333 = *_332;
_337 = MEM[(float *)local_Filter_33 + 40B];
_338 = _333 * _337;
_345 = _170 + _985;
_346 = (long unsigned int) _345;
_347 = _346 * 4;
_348 = pretmp_889 + _347;
_349 = *_348;
_353 = MEM[(float *)local_Filter_33 + 44B];
_354 = _349 * _353;
_75 = _338 + _354;
_361 = ix_187 + _985;
_362 = (long unsigned int) _361;
_363 = _362 * 4;
_364 = pretmp_889 + _363;
_365 = *_364;
_369 = MEM[(float *)local_Filter_33 + 48B];
_370 = _365 * _369;
_377 = _202 + _985;
_378 = (long unsigned int) _377;
_379 = _378 * 4;
_380 = pretmp_889 + _379;
_381 = *_380;
_385 = MEM[(float *)local_Filter_33 + 52B];
_386 = _381 * _385;
_393 = _218 + _985;
_394 = (long unsigned int) _393;
_395 = _394 * 4;
_396 = pretmp_889 + _395;
_397 = *_396;
_401 = MEM[(float *)local_Filter_33 + 56B];
_402 = _397 * _401;
_76 = _386 + _402;
_495 = _75 + _76;
_415 = _154 + _991;
_416 = (long unsigned int) _415;
_417 = _416 * 4;
_418 = pretmp_889 + _417;
_419 = *_418;
_423 = MEM[(float *)local_Filter_33 + 60B];
_424 = _419 * _423;
_431 = _170 + _991;
_432 = (long unsigned int) _431;
_433 = _432 * 4;
_434 = pretmp_889 + _433;
_435 = *_434;
_439 = MEM[(float *)local_Filter_33 + 64B];
_440 = _435 * _439;
_572 = _424 + _440;
_447 = ix_187 + _991;
_448 = (long unsigned int) _447;
_449 = _448 * 4;
_450 = pretmp_889 + _449;
_451 = *_450;
_455 = MEM[(float *)local_Filter_33 + 68B];
_456 = _451 * _455;
_73 = _370 + _456;
_65 = _72 + _73;
_55 = _65 + _67;
_25 = _55 + _56;
_19 = _25 + _495;
_463 = _202 + _991;
_464 = (long unsigned int) _463;
_465 = _464 * 4;
_466 = pretmp_889 + _465;
_467 = *_466;
_471 = MEM[(float *)local_Filter_33 + 72B];
_472 = _467 * _471;
_479 = _218 + _991;
_480 = (long unsigned int) _479;
_481 = _480 * 4;
_482 = pretmp_889 + _481;
_483 = *_482;
_487 = MEM[(float *)local_Filter_33 + 76B];
_488 = _483 * _487;
_556 = _472 + _488;
_20 = _556 + _572;
_429 = _19 + _20;
_501 = _154 + _997;
_502 = (long unsigned int) _501;
_503 = _502 * 4;
_504 = pretmp_889 + _503;
_505 = *_504;
_509 = MEM[(float *)local_Filter_33 + 80B];
_510 = _505 * _509;
_517 = _170 + _997;
_518 = (long unsigned int) _517;
_519 = _518 * 4;
_520 = pretmp_889 + _519;
_521 = *_520;
_525 = MEM[(float *)local_Filter_33 + 84B];
_526 = _521 * _525;
_444 = _510 + _526;
_533 = ix_187 + _997;
_534 = (long unsigned int) _533;
_535 = _534 * 4;
_536 = pretmp_889 + _535;
_537 = *_536;
_541 = MEM[(float *)local_Filter_33 + 88B];
_542 = _537 * _541;
_549 = _202 + _997;
_550 = (long unsigned int) _549;
_551 = _550 * 4;
_552 = pretmp_889 + _551;
_553 = *_552;
_557 = MEM[(float *)local_Filter_33 + 92B];
_558 = _553 * _557;
_565 = _218 + _997;
_566 = (long unsigned int) _565;
_567 = _566 * 4;
_568 = pretmp_889 + _567;
_569 = *_568;
_573 = MEM[(float *)local_Filter_33 + 96B];
_574 = _569 * _573;
_445 = _558 + _574;
_430 = _444 + _445;
_257 = _429 + _430;
sum_575 = _257 + _542;
_21 = pretmp_887 + _363;
*_21 = sum_575;
ivtmp_1064 = ivtmp_1065 - 1;
if (ivtmp_1064 != 0)
goto <bb 3>;
else
goto <bb 5>;
<bb 5>:
ivtmp_1062 = ivtmp_1063 - 1;
if (ivtmp_1062 != 0)
goto <bb 6>;
else
goto <bb 8>;
<bb 6>:
<bb 7>:
# iy_186 = PHI <_990(6), 2(2)>
# ivtmp_1063 = PHI <ivtmp_1062(6), 512(2)>
_970 = iy_186 + -2;
_971 = _970 * 516;
_979 = iy_186 + -1;
_980 = _979 * 516;
_985 = iy_186 * 516;
_990 = iy_186 + 1;
_991 = _990 * 516;
_996 = iy_186 + 2;
_997 = _996 * 516;
goto <bb 4>;
<bb 8>:
return;
Most memory references in <bb 4> are accessing the same memory object, but
IVOPT failed to group these IVs because PRE hoists some parts of address
computation into <bb7>. And PRE/LIM creates more difficult code than
vectorizer because the CSE opportunities are hidden by re-association.
I will first try to fix vectorizer issue since PRE/LIM issue isn't that
critical because it's only exposed in loops unrolled by tree cunroll, and in
versioned/peeled loops only.
>From gcc-bugs-return-524743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 16:53:12 2016
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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/70877] [MPX] ICE in in convert_move
Date: Tue, 10 May 2016 16:53:00 -0000
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--- Comment #2 from Vittorio Zecca <zeccav at gmail dot com> ---
I confirm fixed in 6.1.0 and trunk.
Thank you!
>From gcc-bugs-return-524744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 16:59:50 2016
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70916] [6 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "tree_operand_check"
Date: Tue, 10 May 2016 16:59:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue May 10 16:59:04 2016
New Revision: 236094
URL: https://gcc.gnu.org/viewcvs?rev=236094&root=gcc&view=rev
Log:
Backported from mainline
2016-05-03 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/70916
* tree-vect-patterns.c (vect_recog_mask_conversion_pattern): Give up
if COND_EXPR rhs1 is neither SSA_NAME nor COMPARISON_CLASS_P.
* gcc.c-torture/compile/pr70916.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.c-torture/compile/pr70916.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-vect-patterns.c
>From gcc-bugs-return-524745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 17:05:28 2016
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/68030] Redundant address calculations in vectorized loop
Date: Tue, 10 May 2016 17:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68030
--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On May 10, 2016 6:25:57 PM GMT+02:00, "amker at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68030
>
>--- Comment #6 from amker at gcc dot gnu.org ---
>It's not only the vectorizer generating CSE sub-optimal code, pre and
>lim also
>do this kind of transform.
In another PR I suggested swapping LIM and PRE to cleanup after LIM. IIRC that
had some testsuite regressions.
>Compiling the attached example with below command line
>
>$ ./gcc -S -Ofast -march=haswell pr68030.c -o pr68030.S
>-fdump-tree-vect-details -fdump-tree-slp -fdump-tree-ivopts-details
>-fdump-tree-all -fno-tree-vectorize
>
>Gives below dump info before IVOPT:
>
> <bb 2>:
> local_Filter_33 = global_Filters;
> pretmp_887 = global_Output;
> pretmp_889 = global_Input;
> goto <bb 7>;
>
> <bb 3>:
>
> <bb 4>:
> # ix_187 = PHI <_202(3), 2(7)>
> # ivtmp_1065 = PHI <ivtmp_1064(3), 512(7)>
> _154 = ix_187 + -2;
> _157 = _154 + _971;
> _158 = (long unsigned int) _157;
> _159 = _158 * 4;
> _160 = pretmp_889 + _159;
> _161 = *_160;
> _165 = *local_Filter_33;
> _166 = _161 * _165;
> _170 = ix_187 + -1;
> _173 = _170 + _971;
> _174 = (long unsigned int) _173;
> _175 = _174 * 4;
> _176 = pretmp_889 + _175;
> _177 = *_176;
> _181 = MEM[(float *)local_Filter_33 + 4B];
> _182 = _177 * _181;
> _81 = _166 + _182;
> _189 = ix_187 + _971;
> _190 = (long unsigned int) _189;
> _191 = _190 * 4;
> _192 = pretmp_889 + _191;
> _193 = *_192;
> _197 = MEM[(float *)local_Filter_33 + 8B];
> _198 = _193 * _197;
> _202 = ix_187 + 1;
> _205 = _202 + _971;
> _206 = (long unsigned int) _205;
> _207 = _206 * 4;
> _208 = pretmp_889 + _207;
> _209 = *_208;
> _213 = MEM[(float *)local_Filter_33 + 12B];
> _214 = _209 * _213;
> _218 = ix_187 + 2;
> _221 = _218 + _971;
> _222 = (long unsigned int) _221;
> _223 = _222 * 4;
> _224 = pretmp_889 + _223;
> _225 = *_224;
> _229 = MEM[(float *)local_Filter_33 + 16B];
> _230 = _225 * _229;
> _82 = _214 + _230;
> _67 = _81 + _82;
> _243 = _154 + _980;
> _244 = (long unsigned int) _243;
> _245 = _244 * 4;
> _246 = pretmp_889 + _245;
> _247 = *_246;
> _251 = MEM[(float *)local_Filter_33 + 20B];
> _252 = _247 * _251;
> _259 = _170 + _980;
> _260 = (long unsigned int) _259;
> _261 = _260 * 4;
> _262 = pretmp_889 + _261;
> _263 = *_262;
> _267 = MEM[(float *)local_Filter_33 + 24B];
> _268 = _263 * _267;
> _78 = _252 + _268;
> _275 = ix_187 + _980;
> _276 = (long unsigned int) _275;
> _277 = _276 * 4;
> _278 = pretmp_889 + _277;
> _279 = *_278;
> _283 = MEM[(float *)local_Filter_33 + 28B];
> _284 = _279 * _283;
> _72 = _198 + _284;
> _291 = _202 + _980;
> _292 = (long unsigned int) _291;
> _293 = _292 * 4;
> _294 = pretmp_889 + _293;
> _295 = *_294;
> _299 = MEM[(float *)local_Filter_33 + 32B];
> _300 = _295 * _299;
> _307 = _218 + _980;
> _308 = (long unsigned int) _307;
> _309 = _308 * 4;
> _310 = pretmp_889 + _309;
> _311 = *_310;
> _315 = MEM[(float *)local_Filter_33 + 36B];
> _316 = _311 * _315;
> _79 = _300 + _316;
> _56 = _78 + _79;
> _329 = _154 + _985;
> _330 = (long unsigned int) _329;
> _331 = _330 * 4;
> _332 = pretmp_889 + _331;
> _333 = *_332;
> _337 = MEM[(float *)local_Filter_33 + 40B];
> _338 = _333 * _337;
> _345 = _170 + _985;
> _346 = (long unsigned int) _345;
> _347 = _346 * 4;
> _348 = pretmp_889 + _347;
> _349 = *_348;
> _353 = MEM[(float *)local_Filter_33 + 44B];
> _354 = _349 * _353;
> _75 = _338 + _354;
> _361 = ix_187 + _985;
> _362 = (long unsigned int) _361;
> _363 = _362 * 4;
> _364 = pretmp_889 + _363;
> _365 = *_364;
> _369 = MEM[(float *)local_Filter_33 + 48B];
> _370 = _365 * _369;
> _377 = _202 + _985;
> _378 = (long unsigned int) _377;
> _379 = _378 * 4;
> _380 = pretmp_889 + _379;
> _381 = *_380;
> _385 = MEM[(float *)local_Filter_33 + 52B];
> _386 = _381 * _385;
> _393 = _218 + _985;
> _394 = (long unsigned int) _393;
> _395 = _394 * 4;
> _396 = pretmp_889 + _395;
> _397 = *_396;
> _401 = MEM[(float *)local_Filter_33 + 56B];
> _402 = _397 * _401;
> _76 = _386 + _402;
> _495 = _75 + _76;
> _415 = _154 + _991;
> _416 = (long unsigned int) _415;
> _417 = _416 * 4;
> _418 = pretmp_889 + _417;
> _419 = *_418;
> _423 = MEM[(float *)local_Filter_33 + 60B];
> _424 = _419 * _423;
> _431 = _170 + _991;
> _432 = (long unsigned int) _431;
> _433 = _432 * 4;
> _434 = pretmp_889 + _433;
> _435 = *_434;
> _439 = MEM[(float *)local_Filter_33 + 64B];
> _440 = _435 * _439;
> _572 = _424 + _440;
> _447 = ix_187 + _991;
> _448 = (long unsigned int) _447;
> _449 = _448 * 4;
> _450 = pretmp_889 + _449;
> _451 = *_450;
> _455 = MEM[(float *)local_Filter_33 + 68B];
> _456 = _451 * _455;
> _73 = _370 + _456;
> _65 = _72 + _73;
> _55 = _65 + _67;
> _25 = _55 + _56;
> _19 = _25 + _495;
> _463 = _202 + _991;
> _464 = (long unsigned int) _463;
> _465 = _464 * 4;
> _466 = pretmp_889 + _465;
> _467 = *_466;
> _471 = MEM[(float *)local_Filter_33 + 72B];
> _472 = _467 * _471;
> _479 = _218 + _991;
> _480 = (long unsigned int) _479;
> _481 = _480 * 4;
> _482 = pretmp_889 + _481;
> _483 = *_482;
> _487 = MEM[(float *)local_Filter_33 + 76B];
> _488 = _483 * _487;
> _556 = _472 + _488;
> _20 = _556 + _572;
> _429 = _19 + _20;
> _501 = _154 + _997;
> _502 = (long unsigned int) _501;
> _503 = _502 * 4;
> _504 = pretmp_889 + _503;
> _505 = *_504;
> _509 = MEM[(float *)local_Filter_33 + 80B];
> _510 = _505 * _509;
> _517 = _170 + _997;
> _518 = (long unsigned int) _517;
> _519 = _518 * 4;
> _520 = pretmp_889 + _519;
> _521 = *_520;
> _525 = MEM[(float *)local_Filter_33 + 84B];
> _526 = _521 * _525;
> _444 = _510 + _526;
> _533 = ix_187 + _997;
> _534 = (long unsigned int) _533;
> _535 = _534 * 4;
> _536 = pretmp_889 + _535;
> _537 = *_536;
> _541 = MEM[(float *)local_Filter_33 + 88B];
> _542 = _537 * _541;
> _549 = _202 + _997;
> _550 = (long unsigned int) _549;
> _551 = _550 * 4;
> _552 = pretmp_889 + _551;
> _553 = *_552;
> _557 = MEM[(float *)local_Filter_33 + 92B];
> _558 = _553 * _557;
> _565 = _218 + _997;
> _566 = (long unsigned int) _565;
> _567 = _566 * 4;
> _568 = pretmp_889 + _567;
> _569 = *_568;
> _573 = MEM[(float *)local_Filter_33 + 96B];
> _574 = _569 * _573;
> _445 = _558 + _574;
> _430 = _444 + _445;
> _257 = _429 + _430;
> sum_575 = _257 + _542;
> _21 = pretmp_887 + _363;
> *_21 = sum_575;
> ivtmp_1064 = ivtmp_1065 - 1;
> if (ivtmp_1064 != 0)
> goto <bb 3>;
> else
> goto <bb 5>;
>
> <bb 5>:
> ivtmp_1062 = ivtmp_1063 - 1;
> if (ivtmp_1062 != 0)
> goto <bb 6>;
> else
> goto <bb 8>;
>
> <bb 6>:
>
> <bb 7>:
> # iy_186 = PHI <_990(6), 2(2)>
> # ivtmp_1063 = PHI <ivtmp_1062(6), 512(2)>
> _970 = iy_186 + -2;
> _971 = _970 * 516;
> _979 = iy_186 + -1;
> _980 = _979 * 516;
> _985 = iy_186 * 516;
> _990 = iy_186 + 1;
> _991 = _990 * 516;
> _996 = iy_186 + 2;
> _997 = _996 * 516;
> goto <bb 4>;
>
> <bb 8>:
> return;
>
>Most memory references in <bb 4> are accessing the same memory object,
>but
>IVOPT failed to group these IVs because PRE hoists some parts of
>address
>computation into <bb7>. And PRE/LIM creates more difficult code than
>vectorizer because the CSE opportunities are hidden by re-association.
>
>I will first try to fix vectorizer issue since PRE/LIM issue isn't that
>critical because it's only exposed in loops unrolled by tree cunroll,
>and in
>versioned/peeled loops only.
>From gcc-bugs-return-524747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 17:25:41 2016
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Subject: [Bug target/70963] vec_cts/vec_ctf intrinsics produce wrong results for 64-bit floating point
Date: Tue, 10 May 2016 17:25:00 -0000
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Fixed everywhere.
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Subject: [Bug target/70963] vec_cts/vec_ctf intrinsics produce wrong results for 64-bit floating point
Date: Tue, 10 May 2016 17:25:00 -0000
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--- Comment #9 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Tue May 10 17:24:32 2016
New Revision: 236097
URL: https://gcc.gnu.org/viewcvs?rev=236097&root=gcc&view=rev
Log:
[gcc]
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/70963
* config/rs6000/vsx.md (vsx_xvcvdpsxds_scale): Generate correct
code for a zero scale factor.
(vsx_xvcvdpuxds_scale): Likewise.
[gcc/testsuite]
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2016-05-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/70963
* gcc.target/powerpc/pr70963.c: New.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/powerpc/pr70963.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/config/rs6000/vsx.md
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug libstdc++/71049] New: [6/7 Regression] libstdc++ fails to build --with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
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Bug ID: 71049
Summary: [6/7 Regression] libstdc++ fails to build
--with-default-libstdcxx-abi=gcc4-compatible
--disable-libstdcxx-dual-abi
Product: gcc
Version: 6.1.1
Status: UNCONFIRMED
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libstdc++ fails to build when configured
--with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
../../../../../src/libstdc++-v3/src/c++11/cow-stdexcept.cc: In function 'const
char* _txnal_sso_string_c_str(const void*)':
../../../../../src/libstdc++-v3/src/c++11/cow-stdexcept.cc:300:40: error:
'const __sso_string {aka const class std::basic_string<char>}' has no member
named '_M_s'; did you mean '_M_rep'?
&((const std::__sso_string*) that)->_M_s._M_p));
^~~~
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
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--- Comment #19 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
Fixed on 7, 6, 5, and 4.9. and closing. Please let me know if further
problems arise.
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Subject: [Bug libfortran/70684] [4.9/5/6/7 Regression] incorrect reading of values from file on Windows
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Jerry DeLisle <jvdelisle at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #20 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
and ...
>From gcc-bugs-return-524751-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 19:37:05 2016
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Subject: [Bug tree-optimization/71050] New: [7 regression] test case gcc.target/powerpc/lhs-1.c fails starting with r236066
Date: Tue, 10 May 2016 19:37:00 -0000
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Bug ID: 71050
Summary: [7 regression] test case gcc.target/powerpc/lhs-1.c
fails starting with r236066
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
Executing on host: /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/ linker_plugin40918.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -flto
-fuse-linker-plugin -lm -o linker_plugin40918.exe (timeout = 300)
spawn /home/seurer/gcc/build/gcc-test/gcc/xgcc
-B/home/seurer/gcc/build/gcc-test/gcc/ linker_plugin40918.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -flto -fuse-linker-plugin
-lm -o linker_plugin40918.exe
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.target/powerpc/lhs-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -mcpu=power5
-ffat-lto-objects -S -o lhs-1.s (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.target/powerpc/lhs-1.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -O2 -mcpu=power5
-ffat-lto-objects -S -o lhs-1.s
PASS: gcc.target/powerpc/lhs-1.c (test for excess errors)
FAIL: gcc.target/powerpc/lhs-1.c scan-assembler-times nop 3
=== gcc Summary ===
# of expected passes 1
# of unexpected failures 1
The test case is looking for nops but there are a bunch of extra instructions
being generated.
stfd 1,0(4)
lwz 3,4(4)
to this:
stfd 1,-16(1)
stfd 1,0(4)
ld 3,-16(1)
srdi 3,3,32
>From gcc-bugs-return-524752-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 20:18:24 2016
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From: "acsawdey at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/44382] Slow integer multiply
Date: Tue, 10 May 2016 20:18:00 -0000
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acsawdey at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |acsawdey at gcc dot gnu.org
--- Comment #11 from acsawdey at gcc dot gnu.org ---
236043 adds rs6000_reassociation_width() to enable parallel reassociation for
ppc64/ppc64le with -mcpu=power8. The width is picked to be a balance between
something wide enough to exploit the core resources but not so wide that we
generate a lot of excess spills. SPEC 2006 int is pretty neutral but fp sees
some gains, largely because lbm gets a big improvement from this.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71051
Bug ID: 71051
Summary: incorrect sparc64 code generated, inevitable jump to
null function pointer
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: martin at netbsd dot org
Target Milestone: ---
Created attachment 38464
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38464&action=edit
striped down example C code
Attached is a reduced example of code that is part of the NetBSD C startup, it
is used to call all destructors in a shared binary before unloading the module.
There is some linker magic used to fill the dtor pointer array.
We hit the issue in the wild, but the stripped attached example shows the
invalid code. We have seen similar issues on other architectures, so it is
likely not sparc64 specific, but this case has been analyzed best.
The loop over the dtors is terminated when the current dtor pointer is >=
__DTOR_LIST_END__, and the generated asm code goes like:
or %i4, %l44(__DTOR_LIST_END__), %i4
cmp %i5, %i4
blu,pt %xcc, .LL5
mov 0, %g1
If the branch to .LL5 is taken, %g1 will always be NULL. So not surprisingly we
crash by jumping to 0:
.LL5:
call %g1, 0
add %i5, 8, %i5
This is with the 5.3 version integrated in NetBSD-current:
> cc -v
Using built-in specs.
COLLECT_GCC=cc
COLLECT_LTO_WRAPPER=/usr/libexec/lto-wrapper
Target: sparc64--netbsd
Configured with: /usr/src/tools/gcc/../../external/gpl3/gcc/dist/configure
--target=sparc64--netbsd --enable-long-long --enable-threads
--with-bugurl=http://www.NetBSD.org/Misc/send-pr.html --with-pkgversion='NetBSD
nb1 20160317' --with-system-zlib --enable-__cxa_atexit
--enable-libstdcxx-threads --enable-libstdcxx-time=rt
--with-mpc-lib=/var/obj/mknative/sparc64/usr/src/external/lgpl3/mpc/lib/libmpc
--with-mpfr-lib=/var/obj/mknative/sparc64/usr/src/external/lgpl3/mpfr/lib/libmpfr
--with-gmp-lib=/var/obj/mknative/sparc64/usr/src/external/lgpl3/gmp/lib/libgmp
--with-mpc-include=/usr/src/external/lgpl3/mpc/dist/src
--with-mpfr-include=/usr/src/external/lgpl3/mpfr/dist/src
--with-gmp-include=/usr/src/external/lgpl3/gmp/lib/libgmp/arch/sparc64
--enable-tls --disable-multilib --disable-symvers --disable-libstdcxx-pch
--build=x86_64-unknown-netbsd7.0. --host=sparc64--netbsd
--with-sysroot=/var/obj/mknative/sparc64/usr/src/destdir.sparc64
Thread model: posix
gcc version 5.3.0 (nb1 20160317)
and the compiler invocation w.as
cc -Wall -Wextra -O2 -fno-strict-aliasing -fwrapv -c -S example.c
>From gcc-bugs-return-524754-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 20:26:18 2016
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From: "martin at netbsd dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/71051] incorrect sparc64 code generated, inevitable jump to null function pointer
Date: Tue, 10 May 2016 20:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71051
--- Comment #1 from Martin Husemann <martin at netbsd dot org> ---
Created attachment 38465
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38465&action=edit
generated asm code
>From gcc-bugs-return-524755-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 20:55:51 2016
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From: "wschmidt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/44382] Slow integer multiply
Date: Tue, 10 May 2016 20:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44382
--- Comment #12 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
I'd propose that this bug can now be closed. If nobody objects, I'll do that
later this week.
>From gcc-bugs-return-524756-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 21:16:42 2016
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From: "dengel at synopsys dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/71052] New: Use of Range Based For Loop in unsupported dialect results in malformed code
Date: Tue, 10 May 2016 21:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71052
Bug ID: 71052
Summary: Use of Range Based For Loop in unsupported dialect
results in malformed code
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dengel at synopsys dot com
Target Milestone: ---
Using GCC 5.1 if range based for loop is present and we are not compiling in
c++11 or gnu++11 mode some weird behavior is observed.
Upon compilation, we are met with a warning, however, we compile successfully
and the resulting code is broken. The below code snippet compiles and runs as
expected in c++11 mode, but in c++98 mode we see a warning, and the resulting
binary loops infinitely.
Reproducer:
$ cat t.cpp
int arr[10] = { 0 };
void foo() {
for (int i: arr) {
}
}
$ g++ -c -std=c++98 -O0 t.cpp
t.cpp: In function ‘void foo()’:
t.cpp:3:17: warning: range-based ‘for’ loops only available with -std=c++11 or
-std=gnu++11
for (int i: arr) {
^
$ objdump -d t.o
t.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <_Z3foov>:
0: 55 push %rbp
1: 48 89 e5 mov %rsp,%rbp
4: eb fe jmp 4 <_Z3foov+0x4>
>From gcc-bugs-return-524757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 21:35:40 2016
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From: "michael at weiser dot dinsnail.net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/71053] New: [6.1 regression] Volatile read optimized into endless loop
Date: Tue, 10 May 2016 21:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71053
Bug ID: 71053
Summary: [6.1 regression] Volatile read optimized into endless
loop
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: michael at weiser dot dinsnail.net
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avr-g++ of vanilla gcc 6.1.0 called with avr-g++ -Wall -Wextra
-fno-strict-aliasing -fwrapv -fno-aggressive-loop-optimizations -Os t.c -o t.S
-S compiles the following code
while (((*(volatile unsigned char *)(0x1)) & 1) == 0);
into
lds r24,1
sbrs r24,0
.L4:
rjmp .L4
, producing and endless loop. avr-gcc from the same install as well as avr-gcc
and avr-g++ of vanilla gcc 5.3.0 produce:
.L2:
lds r24,1
sbrs r24,0
rjmp .L2
Preprocessed source:
# ~/bin/gcc-6.1.0-avr/bin/avr-g++ -Wall -Wextra -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations -Os t.c -E
# 1 "t.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "t.c"
int main(void) {
while (((*(volatile unsigned char *)(0x1)) & 1) == 0);
}
Full call and output:
# ~/bin/gcc-6.1.0-avr/bin/avr-g++ -Wall -Wextra -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations -Os t.c -o t.S -S -v
Using built-in specs.
Reading specs from
/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/device-specs/specs-avr2
COLLECT_GCC=/Users/michael/bin/gcc-6.1.0-avr/bin/avr-g++
Target: avr
Configured with: ../configure --prefix=/Users/michael/bin/gcc-6.1.0-avr
--with-gmp=/Users/michael/bin/gcc-6.1.0-avr
--with-mpfr=/Users/michael/bin/gcc-6.1.0-avr
--with-mpc=/Users/michael/bin/gcc-6.1.0-avr --target=avr
--enable-languages=c,c++ --disable-nls --disable-libssp --with-dwarf2
Thread model: single
gcc version 6.1.0 (GCC)
COLLECT_GCC_OPTIONS='-Wall' '-Wextra' '-fno-strict-aliasing' '-fwrapv'
'-fno-aggressive-loop-optimizations' '-Os' '-o' 't.S' '-S' '-v'
'-specs=device-specs/specs-avr2'
/Users/michael/bin/gcc-6.1.0-avr/libexec/gcc/avr/6.1.0/cc1plus -quiet -v t.c
-mn-flash=6 -mskip-bug -quiet -dumpbase t.c -auxbase-strip t.S -Os -Wall
-Wextra -version -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations -o t.S -mn-flash=6 -mskip-bug -fno-rtti
-fno-enforce-eh-specs -fno-exceptions
GNU C++14 (GCC) version 6.1.0 (avr)
compiled by GNU C version 4.2.1 Compatible Apple LLVM 7.3.0
(clang-703.0.29), GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl
version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/../../../../avr/include/c++/6.1.0"
ignoring nonexistent directory
"/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/../../../../avr/include/c++/6.1.0/avr"
ignoring nonexistent directory
"/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/../../../../avr/include/c++/6.1.0/backward"
ignoring nonexistent directory
"/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/../../../../avr/sys-include"
#include "..." search starts here:
#include <...> search starts here:
/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/include
/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/include-fixed
/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/../../../../avr/include
End of search list.
GNU C++14 (GCC) version 6.1.0 (avr)
compiled by GNU C version 4.2.1 Compatible Apple LLVM 7.3.0
(clang-703.0.29), GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl
version none
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 7c30ccc7fec31875d3fa3f6ec56cc92b
COMPILER_PATH=/Users/michael/bin/gcc-6.1.0-avr/libexec/gcc/avr/6.1.0/:/Users/michael/bin/gcc-6.1.0-avr/libexec/gcc/avr/6.1.0/:/Users/michael/bin/gcc-6.1.0-avr/libexec/gcc/avr/:/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/:/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/:/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/../../../../avr/bin/
LIBRARY_PATH=/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/:/Users/michael/bin/gcc-6.1.0-avr/lib/gcc/avr/6.1.0/../../../../avr/lib/
COLLECT_GCC_OPTIONS='-Wall' '-Wextra' '-fno-strict-aliasing' '-fwrapv'
'-fno-aggressive-loop-optimizations' '-Os' '-o' 't.S' '-S' '-v'
'-specs=device-specs/specs-avr2'
>From gcc-bugs-return-524758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 22:02:05 2016
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From: "john.ettedgui at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/71054] New: internal compiler error: in expand_expr_real_2, at expr.c:8097
Date: Tue, 10 May 2016 22:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71054
Bug ID: 71054
Summary: internal compiler error: in expand_expr_real_2, at
expr.c:8097
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: john.ettedgui at gmail dot com
Target Milestone: ---
Hello,
Compiling the latest rpcs3 code from git, I get an internal compiler error.
This is my first time getting that so I'm not quite sure how to report it.
I am using gcc 6.1.1, on Arch Linux x64, Linux 4.5.3.
My CPU is an Intel i7-4790K, so Haswell Refresh.
gcc's options for building:
# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48565
CFLAGS=${CFLAGS/-pipe/}
CXXFLAGS=${CXXFLAGS/-pipe/}
configure --prefix=/usr \
--libdir=/usr/lib --libexecdir=/usr/lib \
--mandir=/usr/share/man --infodir=/usr/share/info \
--with-bugurl=https://bugs.archlinux.org/ \
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ \
--enable-shared --enable-threads=posix --enable-libmpx \
--with-system-zlib --with-isl --enable-__cxa_atexit \
--disable-libunwind-exceptions --enable-clocale=gnu \
--disable-libstdcxx-pch --disable-libssp \
--enable-gnu-unique-object --enable-linker-build-id \
--enable-lto --enable-plugin --enable-install-libiberty \
--with-linker-hash-style=gnu --enable-gnu-indirect-function \
--enable-multilib --disable-werror \
--enable-checking=release
make
# make documentation
make -C $CHOST/libstdc++-v3/doc doc-man-doxygen
g++ -v
Using built-in specs.
COLLECT_GCC=/usr/bin/g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/6.1.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc-multilib/src/gcc/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release
Thread model: posix
gcc version 6.1.1 20160501 (GCC)
The command line that triggers the bug:
/usr/lib/ccache/bin/c++ -DCMAKE_BUILD -DGLX_GLXEXT_PROTOTYPES
-DGL_GLEXT_PROTOTYPES -DWXUSINGDLL -D_FILE_OFFSET_BITS=64 -D__WXGTK__ -DwxGUI
-isystem /usr/lib/wx/include/gtk2-unicode-3.0 -isystem /usr/include/wx-3.0
-I/usr/include/AL -Irpcs3-git/src/rpcs3/rpcs3/../3rdparty/pugixml/src
-Irpcs3-git/src/rpcs3/rpcs3 -Irpcs3-git/src/rpcs3/rpcs3/Loader
-Irpcs3-git/src/rpcs3/rpcs3/Crypto -Irpcs3-git/src/rpcs3/rpcs3/..
-Irpcs3-git/src/rpcs3/rpcs3/../Utilities/yaml-cpp/include
-Irpcs3-git/src/rpcs3/rpcs3/../asmjit/src/asmjit
-Irpcs3-git/src/rpcs3/rpcs3/../3rdparty/GSL/include
-Irpcs3-git/src/rpcs3/rpcs3/../rsx_program_decompiler/rsx_decompiler
-Irpcs3-git/src/rpcs3/rpcs3/../rsx_program_decompiler/shader_code
-Irpcs3-git/src/rpcs3/rpcs3/../Vulkan/Vulkan-LoaderAndValidationLayers/include
-Irpcs3-git/src/rpcs3/rpcs3/../Vulkan/glslang/glslang/Public
-Irpcs3-git/src/rpcs3/rpcs3/../3rdparty/GL
-Irpcs3-git/src/rpcs3/rpcs3/../3rdparty/stblib -fno-pie -fno-lto -std=c++14
-fexceptions -pthread -g -Wno-attributes -Wno-enum-compare
-Wno-invalid-offsetof -msse -msse2 -mcx16 -mssse3 -Winvalid-pch -include
"rpcs3-git/src/rpcs3/build/rpcs3/cotire/rpcs3_CXX_prefix.hxx" -o
CMakeFiles/rpcs3.dir/Emu/Cell/SPUASMJITRecompiler.cpp.o -c
rpcs3-git/src/rpcs3/rpcs3/Emu/Cell/SPUASMJITRecompiler.cpp
The output:
In file included from
rpcs3-git/src/rpcs3/rpcs3/Emu/Cell/SPUASMJITRecompiler.cpp:6:0:
rpcs3-git/src/rpcs3/rpcs3/Emu/Cell/SPUThread.h:380:31: warning: ignoring
attributes on template argument ‘__m128 {aka __vector(4) float}’
[-Wignored-attributes]
std::array<__m128, 155 + 174> m_data;
^
c++: internal compiler error: Segmentation fault (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.archlinux.org/> for instructions.
rpcs3/CMakeFiles/rpcs3.dir/build.make:5021: recipe for target
'rpcs3/CMakeFiles/rpcs3.dir/Emu/Cell/SPUASMJITRecompiler.cpp.o' failed
make[2]: *** [rpcs3/CMakeFiles/rpcs3.dir/Emu/Cell/SPUASMJITRecompiler.cpp.o]
Error 4
I hope that's enough information, please ask for anything I may have forgotten.
Thank you!
John
>From gcc-bugs-return-524759-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 22:05:47 2016
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Subject: [Bug c++/71054] internal compiler error: in expand_expr_real_2, at expr.c:8097
Date: Tue, 10 May 2016 22:05:00 -0000
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--- Comment #1 from John Ettedgui <john.ettedgui at gmail dot com> ---
Created attachment 38466
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38466&action=edit
The .ii file in gzip format
The standard .ii was too big to be attached so I gzipped it.
>From gcc-bugs-return-524760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 22:30:49 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/71047] [7 Regression] Allocatable component of INTENT(OUT) dummy not set correctly
Date: Tue, 10 May 2016 22:30:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-10
CC| |fritzoreese at gmail dot com,
| |kargl at gcc dot gnu.org
Summary|Allocatable component of |[7 Regression] Allocatable
|INTENT(OUT) dummy not set |component of INTENT(OUT)
|correctly |dummy not set correctly
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Started at revision r235999 (pr56226). The difference between the
dump-tree-original for r235998 and r235999 is
--- pr71047.f90_ r235998.003t.original 2016-05-11 00:17:55.000000000 +0200
+++ pr71047.f90_ r235999.003t.original 2016-05-11 00:17:22.000000000 +0200
@@ -6,8 +6,6 @@ set (struct t_a & restrict y, struct __c
struct t_a t_a.0;
t_a.0.c_abstr.i = 0;
- t_a.0.f._data = 0B;
- t_a.0.f._vptr = (struct __vtype_m_C_abstr * {ref-all}) &__vtab_m_C_abstr;
D.3445 = *y;
*y = t_a.0;
if (D.3445.f._data != 0B && D.3445.f._vptr->_final != 0B)
@@ -50,7 +48,7 @@ p ()
{
static struct t_b __def_init_m_T_b = {.c_abstr={.i=0}};
static struct __vtype_m_T_b __vtab_m_T_b = {._hash=99994213, ._size=4,
._extends=&__vtab_m_C_abstr, ._def_init=&__def_init_m_T_b, ._copy=__copy_m_T_b,
._final=0B};
- static struct t_a res = {.c_abstr={.i=0}, .f={._vptr=&__vtab_m_C_abstr}};
+ static struct t_a res = {.c_abstr={.i=0}};
static struct t_b var = {.c_abstr={.i=0}};
static void __copy_m_T_b (struct t_b & restrict, struct t_b & restrict);
@@ -58,8 +56,6 @@ p ()
struct t_a t_a.4;
t_a.4.c_abstr.i = 0;
- t_a.4.f._data = 0B;
- t_a.4.f._vptr = (struct __vtype_m_C_abstr * {ref-all}) &__vtab_m_C_abstr;
res = t_a.4;
}
{
>From gcc-bugs-return-524761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 22:49:36 2016
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Subject: [Bug libstdc++/71049] [6/7 Regression] libstdc++ fails to build --with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
Date: Tue, 10 May 2016 22:49:00 -0000
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This should be dealt with at the same time as PR 65762
>From gcc-bugs-return-524762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 22:51:39 2016
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/71049] [6/7 Regression] libstdc++ fails to build --with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
Date: Tue, 10 May 2016 22:51:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Actually, the errors involving CTORDTOR suggest this is a problem with the TM
library support. I think that's meant to be disabled completely with
--disable-libstdcxx-dual-abi, but seems to be causing a bootstrap failure
instead.
>From gcc-bugs-return-524763-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 23:32:13 2016
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Subject: [Bug rtl-optimization/71028] [7 regression] ICE in redirect_jump, at jump.c:1560
Date: Tue, 10 May 2016 23:32:00 -0000
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--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Author: segher
Date: Tue May 10 23:31:27 2016
New Revision: 236106
URL: https://gcc.gnu.org/viewcvs?rev=236106&root=gcc&view=rev
Log:
cfgcleanup: Handle a branch with just a return in both arms (PR71028)
If we have a conditional jump that has only a return in both the branch
path and the fallthrough path, and the return on the branch path can not
be made a conditional return, we will try to make a conditional return
from the fallthrough path, and that does not work because we then try
to redirect the (new) jump in the fallthrough block to the original
dest in the branch path, which is the exit block.
For the testcase on ARM we end up in this situation because before the
jump2 pass there are some other insns in the return blocks as well, but
the same insns in both, so those are moved above the conditional jump.
Only later (in the ce3 pass) are the conditional jump and two returns
melded into one return, so we need to handle this strange case here.
PR rtl-optimization/71028
* cfgcleanup.c (try_optimize_cfg): Do not flip a conditional
jump with just a return in the fallthrough block if the branch
block contains just a returns as well.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgcleanup.c
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Subject: [Bug target/71051] incorrect sparc64 code generated, inevitable jump to null function pointer
Date: Tue, 10 May 2016 23:47:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
p < __DTOR_LIST_END__;
is undefined as you are comparing addresses of two different arrays.
>From gcc-bugs-return-524765-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 23:49:56 2016
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Subject: [Bug middle-end/71051] incorrect sparc64 code generated, inevitable jump to null function pointer
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71051
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Component|target |middle-end
Resolution|--- |INVALID
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Simple fix:
const fptr_t *start = __DTOR_LIST__ ;
const fptr_t *end= __DTOR_LIST_END__;
asm("":"+r"(start));
asm("":"+r"(end));
for (const fptr_t *p = start + 1; p < end; ) {
(*(*p++))();
}
---- CUT ----
Basically GCC no longer knows that the array of __DTOR_LIST__ is only of size
1 or that start and end point to two different arrays.
>From gcc-bugs-return-524766-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 10 23:52:39 2016
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Subject: [Bug tree-optimization/71055] New: [7 Regression] FAIL: gcc.dg/torture/pr53663-1.c -Os execution test
Date: Tue, 10 May 2016 23:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71055
Bug ID: 71055
Summary: [7 Regression] FAIL: gcc.dg/torture/pr53663-1.c -Os
execution test
Product: gcc
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On x86, r236066 caused
FAIL: gcc.dg/torture/pr53663-1.c -O1 execution test
FAIL: gcc.dg/torture/pr53663-1.c -O2 execution test
FAIL: gcc.dg/torture/pr53663-1.c -O3 -g execution test
FAIL: gcc.dg/torture/pr53663-1.c -Os execution test
FAIL: gcc.dg/torture/pr53663-1.c -O2 -flto -fno-use-linker-plugin
-flto-partit
ion=none execution test
FAIL: gcc.dg/torture/pr53663-1.c -O1 execution test
FAIL: gcc.dg/torture/pr53663-1.c -O2 execution test
FAIL: gcc.dg/torture/pr53663-1.c -O3 -g execution test
FAIL: gcc.dg/torture/pr53663-1.c -Os execution test
FAIL: gcc.dg/torture/pr53663-1.c -O2 -flto -fno-use-linker-plugin
-flto-partit
ion=none execution test
with
make check-gcc RUNTESTFLAGS="dg-torture.exp=pr53663-1.c
--target_board='unix{-m32\ -fpic,-fpic}'"
>From gcc-bugs-return-524767-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 00:10:44 2016
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |manu at gcc dot gnu.org
--- Comment #15 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to shatz from comment #14)
> It is not documented that __attribute__((optimize(""))) works reliably when
Unfortunately, you should not expect the optimize attribute to work reliably:
https://gcc.gnu.org/wiki/FAQ#optimize_attribute_broken
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Subject: [Bug c/70255] change of the order of summation of floating point numbers despite no-associative-math
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--- Comment #16 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> which is probably an artifact of fully delayed folding.
Do you mean "early folding"? Because "delayed" folding should not apply any
optimizations and not change the source code while parsing.
>From gcc-bugs-return-524769-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 00:32:27 2016
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Subject: [Bug fortran/71047] [7 Regression] Allocatable component of INTENT(OUT) dummy not set correctly
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kargl at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #2 from kargl at gcc dot gnu.org ---
Works for me on gfortran 5.3.x, 6.1 with patch, and 7.0 with patch.
Of course, I had to guess at what the expected output is and guess
at the options to use. YMMV.
PS, Please don't add my email address to PR's
>From gcc-bugs-return-524770-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 00:53:40 2016
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Subject: [Bug target/71056] New: __builtin_bswap32 NEON instruction error with -O3
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Bug ID: 71056
Summary: __builtin_bswap32 NEON instruction error with -O3
Product: gcc
Version: 6.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
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The following code generate a NEON instruction not available error when
compiling with `gcc -march=armv7-a -mfloat-abi=hard -mfpu=vfpv3-d16 -O3 -o
/dev/null -c a.c` on ARM on gcc 6.1.1 (ArchLinuxARM).
```c
#include <string.h>
#include <stdint.h>
extern char *buff;
int f2();
struct T1 {
int32_t reserved[2];
uint32_t ip;
uint16_t cs;
uint16_t rsrv2;
};
void f3(const char *p)
{
struct T1 x;
memcpy(&x, p, sizeof(struct T1));
x.reserved[0] = __builtin_bswap32(x.reserved[0]);
x.reserved[1] = __builtin_bswap32(x.reserved[1]);
x.ip = __builtin_bswap32(x.ip);
x.cs = x.cs << 8 | x.cs >> 8;
x.rsrv2 = x.rsrv2 << 8 | x.rsrv2 >> 8;
if (f2()) {
memcpy(buff, "\n", 1);
}
}
```
Error message
```
alarm% gcc -march=armv7-a -mfloat-abi=hard -mfpu=vfpv3-d16 -O3 -o /dev/null -c
a.c
a.c: In function ‘f3’:
a.c:16:21: fatal error: You must enable NEON instructions (e.g.
-mfloat-abi=softfp -mfpu=neon) to use these intrinsics.
x.reserved[0] = __builtin_bswap32(x.reserved[0]);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
```
Note that `NEON` isn't enabled and there's no direct use of NEON
instructions/intrinsics in the code so the NEON instructions must have been
added by the optimizer.
Seemingly subtle change can make the error disappear. This includes.
1. -O3 -> -O2 (ok, this one is not particularly subtle)
2. Remove any of the byteswap or field
3. Remove any of the memcpy
4. Make the second memcpy unconditional
5. Remove `f2()` (but leave the memcpy condition in some other way)
6. Pass in `x` as argument (either as value or pointer)
The asm generated when compiling with `fpu=neon`
```
f3:
@ args = 0, pretend = 0, frame = 16
@ frame_needed = 0, uses_anonymous_args = 0
mov r3, r0
str lr, [sp, #-4]!
sub sp, sp, #20
ldr r2, [r3, #8] @ unaligned
ldr r1, [r3, #4] @ unaligned
mov ip, sp
ldr r0, [r0] @ unaligned
ldr r3, [r3, #12] @ unaligned
stmia ip!, {r0, r1, r2, r3}
mov r3, r2
ldrh ip, [sp, #12]
rev r3, r3
ldrh r0, [sp, #14]
vldr d16, [sp]
lsr r1, ip, #8
str r3, [sp, #8]
vrev32.8 d16, d16
lsr r2, r0, #8
orr r2, r2, r0, lsl #8
orr r1, r1, ip, lsl #8
strh r2, [sp, #14] @ movhi
strh r1, [sp, #12] @ movhi
vstr d16, [sp]
bl f2
cmp r0, #0
movwne r3, #:lower16:buff
movtne r3, #:upper16:buff
movne r2, #10
ldrne r3, [r3]
strbne r2, [r3]
add sp, sp, #20
@ sp needed
ldr pc, [sp], #4
.size f3, .-f3
.ident "GCC: (GNU) 6.1.1 20160501"
```
And it seems that the NEON instruction it want to generate is `vrev32.8`
The case is simplified from
https://github.com/llvm-mirror/llvm/blob/da4b82ab1387da8c959a4e2439bce10b9cefbc8a/tools/llvm-objdump/MachODump.cpp#L8240-L8263
I don't remember seeing this on gcc 5.
>From gcc-bugs-return-524771-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 01:28:51 2016
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Subject: [Bug c/71013] [7 Regression] c-common.c:12810:37: error: 'LLONG_MAX' was not declared in this scope
Date: Wed, 11 May 2016 01:28:00 -0000
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--- Comment #5 from John David Anglin <danglin at gcc dot gnu.org> ---
It seems on gnu systems, _GNU_SOURCE is defined in CPLUSPLUS_CPP_SPEC
irrespective of -std=gnu++98. This is in gnu-user.h:
/* The GNU C++ standard library requires that these macros be defined. */
#undef CPLUSPLUS_CPP_SPEC
#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
As a result, all C features through to C11 are enabled for c++ on at
least Debian unstable.
Is this correct? I could do something similar for hpux so the macros
get defined.
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Subject: [Bug c++/55004] [meta-bug] constexpr issues
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Bug 55004 depends on bug 38377, which changed state.
Bug 38377 Summary: __builtin_constant_p(t) ? t : 1 is not considered a constant integer expression
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38377
What |Removed |Added
----------------------------------------------------------------------------
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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++/38377] __builtin_constant_p(t) ? t : 1 is not considered a constant integer expression
Date: Wed, 11 May 2016 02:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38377
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Known to work| |4.9.3, 5.3.0, 6.1.0
Blocks| |55004
Resolution|--- |FIXED
Known to fail| |4.2.0, 4.5.3
--- Comment #9 from Martin Sebor <msebor at gcc dot gnu.org> ---
The test case still fails with 4.5.3, but compiles successfully with 4.9.3 and
later. Tests similar to the one in comment #0 that exercise this are in the
test suite (two were were added in r230453). I'm resolving this bug as Fixed.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004
[Bug 55004] [meta-bug] constexpr issues
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Subject: [Bug c++/38611] alignof does not always apply to typedef
Date: Wed, 11 May 2016 03:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38611
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Wed May 11 03:04:03 2016
New Revision: 236112
URL: https://gcc.gnu.org/viewcvs?rev=236112&root=gcc&view=rev
Log:
PR c++/38611 - missing -Wattributes on a typedef with attribute aligned
Added:
trunk/gcc/testsuite/g++.dg/Wattributes.C
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/38611] missing -Wattributes on a typedef with attribute aligned
Date: Wed, 11 May 2016 03:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=38611
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Last reconfirmed| |2016-05-10
CC| |msebor at gcc dot gnu.org
Known to work| |4.5.3, 4.9.3, 5.3.0, 6.1.0
Resolution|--- |FIXED
Summary|alignof does not always |missing -Wattributes on a
|apply to typedef |typedef with attribute
| |aligned
Known to fail| |
--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
Test case added in r236112. Resolving as Fixed.
>From gcc-bugs-return-524776-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 03:31:36 2016
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Subject: [Bug c++/71057] New: ICE in schedule_generic_params_dies_gen, at dwarf2out.c:24142
Date: Wed, 11 May 2016 03:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71057
Bug ID: 71057
Summary: ICE in schedule_generic_params_dies_gen, at
dwarf2out.c:24142
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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A self-built version of GCC
{{{
$
/Users/eschnett/src/spack/opt/spack/darwin-x86_64/clang-7.3.0-apple/gcc-6.1.0-t6ty2xtlhizrs3elacvgpludfccnekb2/bin/g++
--version
g++ (GCC) 6.1.0
Copyright (C) 2016 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.
}}}
aborts with an ICE for this command
{{{
Users/eschnett/src/spack/opt/spack/darwin-x86_64/clang-7.3.0-apple/gcc-6.1.0-t6ty2xtlhizrs3elacvgpludfccnekb2/bin/g++
-g -S fun_test.ii
}}}
with this error
{{{
fun/fun_test.cc:41:1: internal compiler error: in
schedule_generic_params_dies_gen, at dwarf2out.c:24142
}
^
fun/fun_test.cc:41:1: internal compiler error: Abort trap: 6
g++: internal compiler error: Abort trap: 6 (program cc1plus)
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
}}}
for the preprocessed C++ source code available at
<https://gist.github.com/eschnett/1825784e6da47b80741ddbbd0d742db4>.
Leaving out the "-g" flag avoids the error.
This is on OS X with an x86-64 CPU.
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Subject: [Bug c++/71058] New: ICE when building heavy templating and -std=c++17 -gstabs
Date: Wed, 11 May 2016 05:03:00 -0000
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Bug ID: 71058
Summary: ICE when building heavy templating and -std=c++17
-gstabs
Product: gcc
Version: unknown
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Priority: P3
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Target: x86_64-linux-gnu
when compiling this small test case, gcc-5+ crashes. not a regression since it
requires -std=c++17 which is new to gcc-5.
$ cat test.ii
enum VkPipelineBindPoint {};
template <typename> struct A;
template <VkPipelineBindPoint> struct B;
template <> struct A<int> {
template <VkPipelineBindPoint P> static auto a = B<P>::func;
};
$ g++-5.3.0 -c test.ii -gstabs -std=c++17
test.ii:4:20: internal compiler error: Segmentation fault
template <> struct A<int> {
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.gentoo.org/> for instructions.
$ gdb --args g++-5.3.0 -c test.ii -gstabs -std=c++17
(gdb) set follow-fork-mode child
(gdb) run
Starting program: /usr/bin/g++-5.3.0 -c test.ii -gstabs -std=c++17
[New process 25621]
process 25621 is executing new program:
/usr/libexec/gcc/x86_64-pc-linux-gnu/5.3.0/cc1plus
Thread 2.1 "cc1plus" received signal SIGSEGV, Segmentation fault.
[Switching to process 25621]
0x0000000000d071a3 in safe_uhwi (val=val@entry=0x7ffff68a13f8,
len=len@entry=0x0, i=<optimized out>) at .../gcc-5.3.0/gcc/wide-int.cc:85
85 .../gcc-5.3.0/gcc/wide-int.cc: No such file or directory.
(gdb) bt
#0 0x0000000000d071a3 in safe_uhwi (val=val@entry=0x7ffff68a13f8,
len=len@entry=0x0, i=<optimized out>) at .../gcc-5.3.0/gcc/wide-int.cc:85
#1 0x0000000000d09cb3 in safe_uhwi (i=<optimized out>, len=0x0,
val=0x7ffff68a13f8) at .../gcc-5.3.0/gcc/wide-int.cc:85
#2 wi::lshift_large (val=val@entry=0x7fffffffc250, xval=0x7ffff68a13f8,
xlen=0x0, precision=precision@entry=0x80, shift=shift@entry=0x3) at
.../gcc-5.3.0/gcc/wide-int.cc:1917
#3 0x00000000007eae41 in wi::lshift<generic_wide_int<wi::extended_tree<128> >,
int> (y=<optimized out>, x=...) at .../gcc-5.3.0/gcc/wide-int.h:2860
#4 int_bit_position (field=0x7ffff68a0280, field=0x7ffff68a0280) at
.../gcc-5.3.0/gcc/tree.h:5079
#5 dbxout_type_fields (type=<optimized out>) at
.../gcc-5.3.0/gcc/dbxout.c:1546
#6 dbxout_type (type=<optimized out>, type@entry=0x7ffff689ec78,
full=<optimized out>, full@entry=0x1) at .../gcc-5.3.0/gcc/dbxout.c:2223
#7 0x00000000007ed437 in dbxout_symbol (decl=0x7ffff689a720, local=<optimized
out>) at .../gcc-5.3.0/gcc/dbxout.c:2795
#8 0x0000000000a33d56 in rest_of_type_compilation
(type=type@entry=0x7ffff689ec78, toplev=0x1) at .../gcc-5.3.0/gcc/passes.c:309
#9 0x0000000000663b50 in finish_struct_1 (t=0x7ffff689ec78) at
.../gcc-5.3.0/gcc/cp/class.c:6742
#10 0x000000000066484d in finish_struct (t=t@entry=0x7ffff689ec78,
attributes=0x0) at .../gcc-5.3.0/gcc/cp/class.c:6908
#11 0x0000000000682506 in cp_parser_class_specifier_1 (parser=0x7ffff68a0000)
at .../gcc-5.3.0/gcc/cp/parser.c:19880
#12 cp_parser_class_specifier (parser=0x7ffff68a0000) at
.../gcc-5.3.0/gcc/cp/parser.c:20108
#13 cp_parser_type_specifier (parser=parser@entry=0x7ffff68a0000,
flags=flags@entry=0x1, decl_specs=decl_specs@entry=0x7fffffffc6f0,
is_declaration=is_declaration@entry=0x1,
declares_class_or_enum=declares_class_or_enum@entry=0x7fffffffc684,
is_cv_qualifier=is_cv_qualifier@entry=0x7fffffffc683) at
.../gcc-5.3.0/gcc/cp/parser.c:14727
#14 0x0000000000697de0 in cp_parser_decl_specifier_seq
(parser=parser@entry=0x7ffff68a0000, flags=flags@entry=0x1,
decl_specs=decl_specs@entry=0x7fffffffc6f0,
declares_class_or_enum=declares_class_or_enum@entry=0x7fffffffc6ec) at
.../gcc-5.3.0/gcc/cp/parser.c:11958
#15 0x000000000069ceed in cp_parser_single_declaration
(parser=parser@entry=0x7ffff68a0000, checks=checks@entry=0x0,
member_p=member_p@entry=0x0,
explicit_specialization_p=explicit_specialization_p@entry=0x1,
friend_p=friend_p@entry=0x0) at .../gcc-5.3.0/gcc/cp/parser.c:23776
#16 0x000000000069d8a9 in cp_parser_explicit_specialization
(parser=parser@entry=0x7ffff68a0000) at .../gcc-5.3.0/gcc/cp/parser.c:14623
#17 0x000000000067f9b0 in cp_parser_declaration
(parser=parser@entry=0x7ffff68a0000) at .../gcc-5.3.0/gcc/cp/parser.c:11332
#18 0x00000000006a703b in cp_parser_declaration_seq_opt
(parser=parser@entry=0x7ffff68a0000) at .../gcc-5.3.0/gcc/cp/parser.c:11265
#19 0x00000000006a7392 in cp_parser_translation_unit (parser=0x7ffff68a0000) at
.../gcc-5.3.0/gcc/cp/parser.c:4100
#20 c_parse_file () at .../gcc-5.3.0/gcc/cp/parser.c:33229
#21 0x000000000075f0ba in c_common_parse_file () at
.../gcc-5.3.0/gcc/c-family/c-opts.c:1057
#22 0x0000000000ae1331 in compile_file () at .../gcc-5.3.0/gcc/toplev.c:594
#23 0x00000000005e7cb0 in do_compile () at .../gcc-5.3.0/gcc/toplev.c:2067
#24 toplev::main (this=this@entry=0x7fffffffc920, argc=argc@entry=0xf,
argv=argv@entry=0x7fffffffca28) at .../gcc-5.3.0/gcc/toplev.c:2165
#25 0x00000000005e8a1e in main (argc=0xf, argv=0x7fffffffca28) at
.../gcc-5.3.0/gcc/main.c:39
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Subject: [Bug tree-optimization/71059] New: gcc ICE at -O3 on valid code on x86_64-linux-gnu in "vn_nary_op_insert_into"
Date: Wed, 11 May 2016 05:21:00 -0000
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Bug ID: 71059
Summary: gcc ICE at -O3 on valid code on x86_64-linux-gnu in
"vn_nary_op_insert_into"
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: helloqirun at gmail dot com
Target Milestone: ---
The following valid code causes an ICE when compiled with the current gcc trunk
at only -O3 on x86_64-linux-gnu in both 32-bit and 64-bit modes.
It appears to be a 7 regression.
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 7.0.0 20160510 (experimental) [trunk revision 236075] (GCC)
$ gcc-trunk -O3 abc.c
abc.c: In function ‘fn2’:
abc.c:8:6: internal compiler error: in vn_nary_op_insert_into, at
tree-ssa-sccvn.c:2735
void fn2() {
^~~
0xd564b0 vn_nary_op_insert_into
../../gcc/gcc/tree-ssa-sccvn.c:2735
0xd569e6 vn_nary_build_or_lookup
../../gcc/gcc/tree-ssa-sccvn.c:1699
0xd5942c vn_reference_lookup_3
../../gcc/gcc/tree-ssa-sccvn.c:1955
0xca6e46 walk_non_aliased_vuses(ao_ref*, tree_node*, void* (*)(ao_ref*,
tree_node*, unsigned int, void*), void* (*)(ao_ref*, tree_node*, void*, bool*),
tree_node* (*)(tree_node*), void*)
../../gcc/gcc/tree-ssa-alias.c:2734
0xd575e0 vn_reference_lookup_pieces(tree_node*, int, tree_node*,
vec<vn_reference_op_struct, va_heap, vl_ptr>, vn_reference_s**, vn_lookup_kind)
../../gcc/gcc/tree-ssa-sccvn.c:2305
0xd37696 phi_translate_1
../../gcc/gcc/tree-ssa-pre.c:1599
0xd3551d phi_translate
../../gcc/gcc/tree-ssa-pre.c:1740
0xd383e4 do_partial_partial_insertion
../../gcc/gcc/tree-ssa-pre.c:3338
0xd383e4 insert_aux
../../gcc/gcc/tree-ssa-pre.c:3458
0xd37d1f insert_aux
../../gcc/gcc/tree-ssa-pre.c:3466
0xd37d1f insert_aux
../../gcc/gcc/tree-ssa-pre.c:3466
0xd3a3e7 insert
../../gcc/gcc/tree-ssa-pre.c:3489
0xd3a3e7 execute
../../gcc/gcc/tree-ssa-pre.c:4788
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.
$ cat abc.c
short a, c;
union {
unsigned f0;
unsigned short f1;
} b;
volatile int d;
short fn1(short p1) { return p1 + a; }
void fn2() {
b.f0 = 0;
for (;; b.f0 = fn1(b.f0))
(c && b.f1) || d;
}
>From gcc-bugs-return-524779-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 06:01:17 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/71057] [6/7 Regression] ICE in schedule_generic_params_dies_gen, at dwarf2out.c:24142
Date: Wed, 11 May 2016 06:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71057
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-11
CC| |trippels at gcc dot gnu.org
Component|c++ |debug
Summary|ICE in |[6/7 Regression] ICE in
|schedule_generic_params_die |schedule_generic_params_die
|s_gen, at dwarf2out.c:24142 |s_gen, at dwarf2out.c:24142
Ever confirmed|0 |1
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Confirmed. Reducing.
>From gcc-bugs-return-524780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 06:05:06 2016
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From: "redboltz at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/61636] generic lambda "cannot call member function without object"
Date: Wed, 11 May 2016 06:05:00 -0000
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Takatoshi Kondo <redboltz at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |redboltz at gmail dot com
--- Comment #17 from Takatoshi Kondo <redboltz at gmail dot com> ---
x.g([]{}) made the following compile error only if it is called *after* calling
f(x) without this->. It seems that a side effect of the problem. If I add
this-> to f(x), all errors are disappeared.
clang++ doesn't make a compile error.
Error message --------------------
ccc_this2.cpp:9:10: note: no known conversion for argument 1 from
‘X::defer_f()::<lambda(auto:1)> [with auto:1 = X]::<lambda()>’ to
‘std::function<void()>’
gcc_this2.cpp:7:10: error: ‘void X::f(T) [with T =
X::defer_f()::<lambda(auto:1)> [with auto:1 = X]::<lambda()>]’, declared using
local type ‘X::defer_f()::<lambda(auto:1)> [with auto:1 = X]::<lambda()>’, is
used but never defined [-fpermissive]
void f(T) {}
Code -----------------------------
#include <functional>
struct X
{
// function template
template <typename T>
void f(T) {}
// function that has std::function as a parameter
void g(std::function<void()> = std::function<void()>()) {}
// function (non template)
void h() {}
auto defer_f()
{
return [&] (auto x) {
x.g([]{}); // Compile passed calling before f(x)
f(x); // Compile error *1 (without this->)
x.f([]{}); // Compile passed
x.h(); // Compile passed
x.g(); // Compile passed
x.g([]{}); // Compile error (maybe side effect of *1)
};
}
};
int main()
{
X x;
x.defer_f()(x);
}
Tested compiler --------------
gcc -v
Using
built-in specs.
COLLECT_GCC=/usr/bin/gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc-multilib/src/gcc-5-20160209/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release
Thread model: posix
gcc version 5.3.0 (GCC)
clang++ -v
clang
version 3.7.1 (tags/RELEASE_371/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation:
/usr/bin/../lib/gcc/x86_64-unknown-linux-gnu/5.3.0
Found candidate GCC installation:
/usr/bin/../lib64/gcc/x86_64-unknown-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-unknown-linux-gnu/5.3.0
Found candidate GCC installation: /usr/lib64/gcc/x86_64-unknown-linux-gnu/5.3.0
Selected GCC installation: /usr/bin/../lib64/gcc/x86_64-unknown-linux-gnu/5.3.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
>From gcc-bugs-return-524781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 06:12:34 2016
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Subject: [Bug c++/71054] [6/7 Regression] ICE: in expand_expr_real_2, at expr.c:8097
Date: Wed, 11 May 2016 06:12:00 -0000
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-11
CC| |trippels at gcc dot gnu.org
Summary|internal compiler error: in |[6/7 Regression] ICE: in
|expand_expr_real_2, at |expand_expr_real_2, at
|expr.c:8097 |expr.c:8097
Ever confirmed|0 |1
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Creduce came up with:
markus@x4 tmp % cat SPUASMJITRecompiler.ii
namespace std {
template <class> class initializer_list {
int *_M_array;
unsigned long _M_len;
};
}
using u32 = int;
template <typename D, typename T = decltype(&D::UNK)> struct spu_decoder {
struct A {
u32 magn;
u32 value;
T pointer;
};
spu_decoder() { std::initializer_list<A> a{{0, 0, &D::FMS}}; }
};
struct spu_recompiler {
void FMS(int);
void UNK(int);
};
spu_decoder<spu_recompiler> b;
markus@x4 tmp % g++ -O2 -c SPUASMJITRecompiler.ii
SPUASMJITRecompiler.ii: In constructor ‘spu_decoder<D, T>::spu_decoder() [with
D = spu_recompiler; T = void (spu_recompiler::*)(int)]’:
SPUASMJITRecompiler.ii:14:61: internal compiler error: in add_expr, at
tree.c:7870
markus@x4 tmp % g++ -c SPUASMJITRecompiler.ii
g++: internal compiler error: Segmentation fault (program cc1plus)
>From gcc-bugs-return-524782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 06:26:12 2016
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Subject: [Bug debug/71057] [6/7 Regression] ICE in schedule_generic_params_dies_gen, at dwarf2out.c:24142
Date: Wed, 11 May 2016 06:26:00 -0000
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--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
trippels@gcc2-power8 ~ % cat fun_test.ii
template <typename _Tp> using decay_t = _Tp;
template <typename> struct A;
template <typename> struct B { B(A<int>); };
template <typename> struct C {
template <typename U> using constructor = B<decay_t<U>>;
typedef constructor<int> dummy;
};
template <typename> struct D {};
C<int> a;
D<B<int>> fn1() { fn1, a; }
trippels@gcc2-power8 ~ % g++ -g -c fun_test.ii
fun_test.ii:10:27: internal compiler error: in
schedule_generic_params_dies_gen, at dwarf2out.c:24143
D<B<int>> fn1() { fn1, a; }
^
0x10681ebf schedule_generic_params_dies_gen
../../gcc/gcc/dwarf2out.c:24143
0x10681ebf gen_struct_or_union_type_die
../../gcc/gcc/dwarf2out.c:22440
0x10681ebf gen_tagged_type_die
../../gcc/gcc/dwarf2out.c:22682
0x10666bef gen_type_die_with_usage
../../gcc/gcc/dwarf2out.c:22847
0x10667cf7 gen_type_die
../../gcc/gcc/dwarf2out.c:22902
0x1066f8c7 modified_type_die
../../gcc/gcc/dwarf2out.c:11454
0x10672053 add_type_attribute
../../gcc/gcc/dwarf2out.c:19033
0x10675bdf gen_formal_parameter_die
../../gcc/gcc/dwarf2out.c:19666
0x1066807f gen_formal_types_die
../../gcc/gcc/dwarf2out.c:19764
0x10669f93 gen_subprogram_die
../../gcc/gcc/dwarf2out.c:20667
0x1066bb47 gen_decl_die
../../gcc/gcc/dwarf2out.c:23471
0x10681bc3 gen_member_die
../../gcc/gcc/dwarf2out.c:22395
0x10681bc3 gen_struct_or_union_type_die
../../gcc/gcc/dwarf2out.c:22479
0x10681bc3 gen_tagged_type_die
../../gcc/gcc/dwarf2out.c:22682
0x10666bef gen_type_die_with_usage
../../gcc/gcc/dwarf2out.c:22847
0x10667cf7 gen_type_die
../../gcc/gcc/dwarf2out.c:22902
0x10685f0f retry_incomplete_types
../../gcc/gcc/dwarf2out.c:19409
0x10685f0f dwarf2out_finish
../../gcc/gcc/dwarf2out.c:27388
Please submit a full bug report
>From gcc-bugs-return-524783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 06:40:56 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/71047] [7 Regression] Allocatable component of INTENT(OUT) dummy not set correctly
Date: Wed, 11 May 2016 06:40:00 -0000
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Works for me on gfortran 5.3.x, 6.1 with patch, and 7.0 with patch.
>
> at the options to use. YMMV.
[Book15] f90/bug% /opt/gcc/gcc7p-235998/bin/gfortran pr71047.f90
[Book15] f90/bug% ./a.out
0
[Book15] f90/bug% /opt/gcc/gcc7p-235999/bin/gfortran pr71047.f90
[Book15] f90/bug% ./a.out
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
Backtrace for this error:
#0 0x10868d5a9
#1 0x10868c985
#2 0x7fff9305f529
#3 0x108688b30
#4 0x108688cb8
#5 0x108688d56
Segmentation fault
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Subject: [Bug c++/71035] GCC does not give error on declaration of non literal type in template function
Date: Wed, 11 May 2016 06:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71035
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ebotcazou at gcc dot gnu.org
Summary|GNU does not give error on |GCC does not give error on
|declaration of non literal |declaration of non literal
|type in template function |type in template function
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Yes I see your point that this is really a QOI issue but GNU does seem
> inconsistent and EDG will have to emulate that inconsistency.
The name of the compiler is GCC (or G++ for the C++ compiler specifically), GNU
is the name of the entire Unix-like project of the FSF.
>From gcc-bugs-return-524785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 07:25:04 2016
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Received: (qmail 24241 invoked by uid 55); 11 May 2016 07:24:51 -0000
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Subject: [Bug c/70255] change of the order of summation of floating point numbers despite no-associative-math
Date: Wed, 11 May 2016 07:25:00 -0000
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--- Comment #17 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 11 May 2016, manu at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70255
>
> --- Comment #16 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #1)
> > which is probably an artifact of fully delayed folding.
>
> Do you mean "early folding"? Because "delayed" folding should not apply any
> optimizations and not change the source code while parsing.
I meant "fully folding" at a point where decls are not yet merged
(whether delayed or not delayed doesn't really matter). So it's not
delayed enough yet.
>From gcc-bugs-return-524786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 07:32:13 2016
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Received: (qmail 74806 invoked by uid 48); 11 May 2016 07:31:59 -0000
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/71059] [7 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "vn_nary_op_insert_into"
Date: Wed, 11 May 2016 07:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71059
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-11
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |7.0
Summary|gcc ICE at -O3 on valid |[7 Regression] gcc ICE at
|code on x86_64-linux-gnu in |-O3 on valid code on
|"vn_nary_op_insert_into" |x86_64-linux-gnu in
| |"vn_nary_op_insert_into"
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed, mine.
>From gcc-bugs-return-524787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 08:14:43 2016
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Subject: [Bug debug/71058] ICE when building heavy templating and -std=c++17 -gstabs
Date: Wed, 11 May 2016 08:14:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-11
Component|c++ |debug
Version|unknown |5.3.0
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Note that -gstabs is mostly dead and surely unmaintained.
>From gcc-bugs-return-524788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 08:17:53 2016
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Received: (qmail 113745 invoked by uid 48); 11 May 2016 08:17:39 -0000
From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/63773] [meta-bug] Restoring darwin bootstrap for gcc 5.0
Date: Wed, 11 May 2016 08:17:00 -0000
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--- Comment #35 from Rainer Orth <ro at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #31)
> (In reply to ro@CeBiTec.Uni-Bielefeld.DE from comment #30)
> > With Xcode 6.4 as, 32-bit bootstrap is now well into running the testsuite.
> >
> > I've filed bug
> >
> > 23669324 Xcode 7 as creates relocation ld cannot handle
>
> Thanks!
>
> The .s file in your attachment crashes TOT llvm/clang (clang -target
> i686-apple-darwin12 xxxx.s -o t.o ) with an assertion "Value does not fit in
> Fixup field". Will try to investigate if I have any spare cycles today.
I've just been notified that the bug is fixed in Xcode 7.3.1. Will try that as
soon as it hits the Appstore.
Rainer
>From gcc-bugs-return-524789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 08:24:04 2016
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Subject: [Bug debug/71057] [6/7 Regression] ICE in schedule_generic_params_dies_gen, at dwarf2out.c:24142
Date: Wed, 11 May 2016 08:24:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Status|NEW |ASSIGNED
CC| |rguenth at gcc dot gnu.org
Known to work| |5.3.0
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |6.2
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hum.
static void
dwarf2out_finish (const char *filename)
{
...
/* Walk through the list of incomplete types again, trying once more to
emit full debugging info for them. */
retry_incomplete_types ();
that's certainly not within the spirit of early-debug. Trivial patch
(on trunk free the vector):
Index: gcc/dwarf2out.c
===================================================================
--- gcc/dwarf2out.c (revision 236032)
+++ gcc/dwarf2out.c (working copy)
@@ -19401,11 +19401,13 @@ gen_entry_point_die (tree decl, dw_die_r
static void
retry_incomplete_types (void)
{
+ set_early_dwarf s;
int i;
for (i = vec_safe_length (incomplete_types) - 1; i >= 0; i--)
if (should_emit_struct_debug ((*incomplete_types)[i],
DINFO_USAGE_DIR_USE))
gen_type_die ((*incomplete_types)[i], comp_unit_die ());
+ vec_safe_truncate (incomplete_types, 0);
}
/* Determine what tag to use for a record type. */
@@ -27382,10 +27384,6 @@ dwarf2out_finish (const char *filename)
resolve_addr (comp_unit_die ());
move_marked_base_types ();
- /* Walk through the list of incomplete types again, trying once more to
- emit full debugging info for them. */
- retry_incomplete_types ();
-
if (flag_eliminate_unused_debug_types)
prune_unused_types ();
@@ -27686,6 +27684,10 @@ dwarf2out_finish (const char *filename)
static void
dwarf2out_early_finish (void)
{
+ /* Walk through the list of incomplete types again, trying once more to
+ emit full debugging info for them. */
+ retry_incomplete_types ();
+
/* The point here is to flush out the limbo list so that it is empty
and we don't need to stream it for LTO. */
flush_limbo_die_list ();
>From gcc-bugs-return-524790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 08:25:28 2016
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Subject: [Bug target/71056] [6/7 Regression] __builtin_bswap32 NEON instruction error with -O3
Date: Wed, 11 May 2016 08:25:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |arm
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-11
CC| |ktkachov at gcc dot gnu.org
Known to work| |5.3.1
Target Milestone|--- |6.2
Summary|__builtin_bswap32 NEON |[6/7 Regression]
|instruction error with -O3 |__builtin_bswap32 NEON
| |instruction error with -O3
Ever confirmed|0 |1
Known to fail| |6.1.0, 7.0
--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed.
>From gcc-bugs-return-524791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 08:34:05 2016
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Subject: [Bug tree-optimization/71055] [7 Regression] FAIL: gcc.dg/torture/pr53663-1.c -Os execution test
Date: Wed, 11 May 2016 08:34:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-11
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |7.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine. Even without -fpic we miscompile this - but twice, cancelling the
effect.
With -fpic we miscompile it only once, namely
v.i = 10;
f (&v1, v);
v.b = 0;
Deleted redundant store v.b = 0;
This is because we now figure that the read from v.b results in 0 which is
of course wrong (technically it has _Bool type and thus its precision makes
the value that GCC can use for optimization zero but it cannot use that
"precision" to say the store is redundant (because it stores still 8 bits).
>From gcc-bugs-return-524792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 08:34:44 2016
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Subject: [Bug tree-optimization/68030] Redundant address calculations in vectorized loop
Date: Wed, 11 May 2016 08:34:00 -0000
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--- Comment #8 from amker at gcc dot gnu.org ---
(In reply to rguenther@suse.de from comment #7)
> On May 10, 2016 6:25:57 PM GMT+02:00, "amker at gcc dot gnu.org"
> <gcc-bugzilla@gcc.gnu.org> wrote:
> >https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68030
> >
> >--- Comment #6 from amker at gcc dot gnu.org ---
> >It's not only the vectorizer generating CSE sub-optimal code, pre and
> >lim also
> >do this kind of transform.
>
> In another PR I suggested swapping LIM and PRE to cleanup after LIM. IIRC
> that had some testsuite regressions.
>
Not really, PRE and LIM do same transform here. What we need is to transform
below:
_970 = iy_186 + -2;
_971 = _970 * 516;
_979 = iy_186 + -1;
_980 = _979 * 516;
_985 = iy_186 * 516;
_990 = iy_186 + 1;
_991 = _990 * 516;
_996 = iy_186 + 2;
_997 = _996 * 516;
into:
_x = iy_186 * 516
_971 = _x - 516 * 2
_980 = _x - 516
_985 = _x
_990 = _x + 516
_997 = _x + 516 * 2
I remember a way to handle reassociation is to assign different ranks to
const/ssa_names, and re-associate expressions wrto to ranks. GCC creates new
expressions time to time (for this case, it's cunroll), we may be able to do
same re-association when we are creating new expressions, thus they can be
easily handled by CSE (or something else).
>From gcc-bugs-return-524793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 08:37:04 2016
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Subject: [Bug target/71056] [6/7 Regression] __builtin_bswap32 NEON instruction error with -O3
Date: Wed, 11 May 2016 08:37:00 -0000
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
The problem is arm_builtin_vectorized_function returning a NEON builtin even
though NEON is not enabled.
I'll have a look
>From gcc-bugs-return-524794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 08:56:10 2016
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Subject: [Bug c++/71054] [6/7 Regression] ICE: in expand_expr_real_2, at expr.c:8097
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r234940.
>From gcc-bugs-return-524795-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 09:05:00 2016
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Subject: [Bug tree-optimization/71055] [7 Regression] FAIL: gcc.dg/torture/pr53663-1.c -Os execution test
Date: Wed, 11 May 2016 09:05:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's a latent issue in unchanged code, not sure how it got exposed by r236066,
ah - I removed the VN_WALKREWRITE check that isn't really necessary.
>From gcc-bugs-return-524796-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 09:07:37 2016
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Subject: [Bug c++/69549] Named Address Spaces does not compile in C++
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--- Comment #1 from Thiago Macieira <thiago at kde dot org> ---
Bump?
Still happening on 7.0 (built 20160502)
>From gcc-bugs-return-524797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 09:08:48 2016
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Subject: [Bug c++/71054] [6/7 Regression] ICE: in expand_expr_real_2, at expr.c:8097
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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-524798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 09:10:30 2016
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Subject: [Bug target/71053] [6/7 Regression] Volatile read optimized into endless loop
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Priority|P3 |P4
Component|c++ |target
Target Milestone|--- |6.2
Summary|[6.1 regression] Volatile |[6/7 Regression] Volatile
|read optimized into endless |read optimized into endless
|loop |loop
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
On x86_64 I get
main:
.LFB0:
.cfi_startproc
.L2:
movb 1, %al
testb $1, %al
je .L2
xorl %eax, %eax
ret
and thus it works fine there. Target issue.
>From gcc-bugs-return-524799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 09:18:32 2016
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Subject: [Bug c++/71054] [6/7 Regression] ICE: in expand_expr_real_2, at expr.c:8097
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The problem is that with the PTRMEM_CST handling moved from the gimplification
hook to genericization (the right thing), as apparently we don't genericize
DECL_INITIAL of VAR_DECLs, nothing handles the PTRMEM_CST anymore.
We have a DECL_EXPR with an artificial VAR_DECL in there that has DECL_INITIAL
set to a CONSTRUCTOR that contains PTRMEM_CST somewhere.
This is due to
else if (IS_TYPE_OR_DECL_P (stmt))
*walk_subtrees = 0;
Shall we recurse on DECL_INITIAL when handling DECL_EXPRs, when handling the
VAR_Ps, something else? Or just call a different walk_tree that only removes
the PTRMEM_CSTs and nothing else?
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Subject: [Bug tree-optimization/71060] New: Compiler reports "loop vectorized" but actually it was not
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71060
Bug ID: 71060
Summary: Compiler reports "loop vectorized" but actually it
was not
Product: gcc
Version: 5.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: niva at niisi dot msk.ru
Target Milestone: ---
Created attachment 38467
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38467&action=edit
The test case to reproduce the problem
I compile the attached test8.c as follows:
/usr/local/bin/gcc -O3 -S -mavx -fopt-info-vec-optimized -DSCOUT -Wall
-Wextra -Werror -Wno-unknown-pragmas test8.c -o test8.s3
The output is:
test8.c:24:2: note: loop vectorized
test8.c:24:2: note: loop versioned for vectorization because of possible
aliasing
But the resulting assembler code contains no vector instructions.
Other problems related to this test are:
1. The pointers in this function has the restrict specifier, so there should be
no loop versioning.
2. I tried to use -ftree-loop-if-convert-stores but it did not help.
Possibly this bug is the same as 65206.
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Subject: [Bug tree-optimization/71050] [7 regression] test case gcc.target/powerpc/lhs-1.c fails starting with r236066
Date: Wed, 11 May 2016 09:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Target Milestone|--- |7.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
On GIMPLE this is now "optimized" to refer to the upper half of the double
with a BIT_FIELD_REF of the parameter d and the union is optimized away.
Ideally this results in (subreg:SI (reg:DF ...) 4) or an equivalent highpart.
It looks like expansion spills this to memory (in theory ok, you'd get sth
equivalent to the union) but then sth messes up things badly. The GIMPLE
transform doesn't factor in that the store to u->val isn't dead after it.
RTL opt/target bug.
Equivalent code for pre-r236066 would be
unsigned int f (double d, words *u)
{
u->val = d;
return ((unsigned int *)&d)[1];
}
and compiling with -fno-strict-aliasing.
With -mcpu=power8 I get
f:
mfvsrd 9,1
stfd 1,0(4)
srdi 3,9,32
blr
Expansion does a df->di move and then extracts the bits via a shift.
So, as I suspected it might be neccessary to restrict the kind of
"subregs" we create. The transform was designed to avoid the union for
the variant
typedef union {
double val;
struct {
unsigned int w1;
unsigned int w2;
};
} words;
unsigned int f (double d)
{
words u;
u.val = d;
return u.w2;
}
but even for that RTL opts cannot recover the original code it seems
as the backend lies to the middle-end(?) in claiming it can do
(insn 6 5 7 (set (reg:DI 158)
(subreg:DI (reg/v:DF 156 [ d ]) 0)) t.c:13 -1
(nil))
but in reality it later goes through memory for this which when done
at expansion time would have resulted in the same code as when being
present with the union.
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Subject: [Bug libstdc++/71049] [6/7 Regression] libstdc++ fails to build --with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
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----------------------------------------------------------------------------
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Subject: [Bug libstdc++/71049] [6/7 Regression] libstdc++ fails to build --with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug tree-optimization/70916] [6 Regression] gcc ICE at -O3 on valid code on x86_64-linux-gnu in "tree_operand_check"
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The ICE is fixed, the second patch has been just an optimization, so shouldn't
be backported, but for the last patch dunno, I believe it already had some
follow up.
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Subject: [Bug tree-optimization/70876] ICE in chkp_find_bounds: Unexpected tree code with_size_expr
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--- Comment #1 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Fixed in trunk by r236086
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Subject: [Bug tree-optimization/71060] Compiler reports "loop vectorized" but actually it was not
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-11
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yeah, I guess it's the same as PR65206 - a disconnect between dependence
analysis and versioning for aliasing.
I'm going to fix the diagnostic issue, the underlying issue is tracked in
PR65206.
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Guess pretty much a dup of PR71054, at least the original issue is the same, we
have DECL_EXPR with VAR_DECL that has DECL_INITIAL of CONSTRUCTOR that contains
PTRMEM_CSTs inside of it. And we never call cp_genericize_r or anything else
that would replace PTRMEM_CSTs on the CONSTRUCTOR.
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Subject: [Bug middle-end/70807] fwprop pass ICE with incoming CDI_DOMINATORS
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--- Comment #4 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Author: ienkovich
Date: Wed May 11 09:33:13 2016
New Revision: 236114
URL: https://gcc.gnu.org/viewcvs?rev=236114&root=gcc&view=rev
Log:
gcc/
PR middle-end/70807
* cfgrtl.h (delete_insn_and_edges): Now return bool.
* cfgrtl.c (delete_insn_and_edges): Likewise.
* config/i386/i386.c (convert_scalars_to_vector): Remove
redundant code.
* cse.c (cse_insn): Compute cse_cfg_altered.
(delete_trivially_dead_insns): Likewise.
(cse_cc_succs): Likewise.
(rest_of_handle_cse): Free dominance info if required.
(rest_of_handle_cse2): Likewise.
(rest_of_handle_cse_after_global_opts): Likewise.
gcc/testsuite/
PR middle-end/70807
* gcc.dg/pr70807.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr70807.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgrtl.c
trunk/gcc/cfgrtl.h
trunk/gcc/config/i386/i386.c
trunk/gcc/cse.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/70855] [6/7 Regression] ICE with -fopenmp in gfc_trans_omp_workshare(): Bad statement code
Date: Wed, 11 May 2016 09:36:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r222864 aka PR37131 to be precise.
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Ilya Enkovich <ienkovich at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Fixed
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Subject: [Bug tree-optimization/70876] ICE in chkp_find_bounds: Unexpected tree code with_size_expr
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--- Comment #2 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Author: ienkovich
Date: Wed May 11 09:51:49 2016
New Revision: 236115
URL: https://gcc.gnu.org/viewcvs?rev=236115&root=gcc&view=rev
Log:
gcc/
Backport from mainline r236086.
2016-05-10 Ilya Enkovich <ilya.enkovich@intel.com>
PR tree-optimization/70876
* tree-chkp.c (chkp_find_bounds_1): Support WITH_SIZE_EXPR.
* gcc/calls.c (initialize_argument_information): Bind bounds
with corresponding args passed by reference.
gcc/testsuite/
Backport from mainline r236086.
2016-05-10 Ilya Enkovich <ilya.enkovich@intel.com>
PR tree-optimization/70876
* gcc.target/i386/pr70876.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr70876.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/calls.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-chkp.c
>From gcc-bugs-return-524812-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 09:56:41 2016
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Subject: [Bug middle-end/70877] [MPX] ICE in in convert_move
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--- Comment #3 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Author: ienkovich
Date: Wed May 11 09:55:55 2016
New Revision: 236116
URL: https://gcc.gnu.org/viewcvs?rev=236116&root=gcc&view=rev
Log:
gcc/
Backport from mainline r236088.
2016-05-10 Ilya Enkovich <ilya.enkovich@intel.com>
PR middle-end/70877
* tree-chkp.c (chkp_add_bounds_to_call_stmt): Handle
calls with type casted fndecl.
gcc/testsuite/
Backport from mainline r236088.
2016-05-10 Ilya Enkovich <ilya.enkovich@intel.com>
PR middle-end/70877
* gcc.target/i386/pr70877.c: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.target/i386/pr70877.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/tree-chkp.c
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--- Comment #4 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Fixed
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Subject: [Bug tree-optimization/70876] ICE in chkp_find_bounds: Unexpected tree code with_size_expr
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Ilya Enkovich <ienkovich at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Fixed
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Subject: [Bug libstdc++/70845] [6/7 Regression] inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
Date: Wed, 11 May 2016 10:09:00 -0000
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--- Comment #8 from Wei-Wei Tu <tuwwcn at gmail dot com> ---
Would this bug be fixed in gcc 6.1.1 or in later version?
>From gcc-bugs-return-524816-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 10:24:02 2016
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Subject: [Bug fortran/70855] [6/7 Regression] ICE with -fopenmp in gfc_trans_omp_workshare(): Bad statement code
Date: Wed, 11 May 2016 10:24:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 38468
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38468&action=edit
gcc7-pr70855.patch
Untested simple fix (that is backportable too).
If we want to parallelize this, I'd say the right thing would be still to
disable the inlining during frontend passes when in omp workshare, make the
inline_matmul_assign function no longer static and during omp workshare
translation call that with some special arguments that would arrange for it to
be properly parallelized. We'd need to ensure that the c = 0 clearing is split
to threads the same way as the following loop, and that each entry in the c
array is only set and modified in the same thread.
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Subject: [Bug middle-end/71002] [6 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Wed, 11 May 2016 10:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0
Summary|[6/7 Regression] |[6 Regression]
|-fstrict-aliasing breaks |-fstrict-aliasing breaks
|Boost's short string |Boost's short string
|optimization implementation |optimization implementation
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mitigated on trunk sofar.
>From gcc-bugs-return-524818-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 10:25:03 2016
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Subject: [Bug middle-end/71002] [6 Regression] -fstrict-aliasing breaks Boost's short string optimization implementation
Date: Wed, 11 May 2016 10:25:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0
Summary|[6/7 Regression] |[6 Regression]
|-fstrict-aliasing breaks |-fstrict-aliasing breaks
|Boost's short string |Boost's short string
|optimization implementation |optimization implementation
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mitigated on trunk sofar.
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 11 10:24:11 2016
New Revision: 236117
URL: https://gcc.gnu.org/viewcvs?rev=236117&root=gcc&view=rev
Log:
2016-05-11 Richard Biener <rguenther@suse.de>
PR middle-end/71002
* alias.c (reference_alias_ptr_type): Preserve alias-set zero
if the langhook insists on it.
* fold-const.c (make_bit_field_ref): Add arg for the original
reference and preserve its alias-set.
(decode_field_reference): Take exp by reference and adjust it
to the original memory reference.
(optimize_bit_field_compare): Adjust callers.
(fold_truth_andor_1): Likewise.
* gimplify.c (gimplify_expr): Adjust in-SSA form test.
* g++.dg/torture/pr71002.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/torture/pr71002.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/alias.c
trunk/gcc/fold-const.c
trunk/gcc/gimplify.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/71060] Compiler reports "loop vectorized" but actually it was not
Date: Wed, 11 May 2016 10:40:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, so in this case the issue is not different base objects but operand_equal_p
returning zero because
3058 || (MR_DEPENDENCE_CLIQUE (arg0)
3059 != MR_DEPENDENCE_CLIQUE (arg1))
3060 || (MR_DEPENDENCE_BASE (arg0)
3061 != MR_DEPENDENCE_BASE (arg1)))
and thus indeed restrict info. restrict info is not preserved when
if-conversion
creates MASK_{LOAD,STORE}.
>From gcc-bugs-return-524820-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 10:49:25 2016
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Subject: [Bug libstdc++/70845] [6/7 Regression] inherited piecewise_construct_t constructor from std::pair by "using-declarations" is missing
Date: Wed, 11 May 2016 10:49:00 -0000
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--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
6.1.1 is not a release, it's the current development snapshot from the gcc-6
branch. It will be fixed in a later version.
>From gcc-bugs-return-524821-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 11:17:23 2016
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/63773] [meta-bug] Restoring darwin bootstrap for gcc 5.0
Date: Wed, 11 May 2016 11:17:00 -0000
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--- Comment #36 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I've just been notified that the bug is fixed in Xcode 7.3.1.
> Will try that as soon as it hits the Appstore.
I have Xcode 7.3.1 since May 4.
>From gcc-bugs-return-524822-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 11:30:55 2016
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Subject: [Bug target/71053] [6/7 Regression] Volatile read optimized into endless loop
Date: Wed, 11 May 2016 11:30:00 -0000
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--- Comment #2 from Michael Weiser <michael at weiser dot dinsnail.net> ---
Also happens with trunk r236113:
# ~/bin/gcc-trunk-20160511-avr/bin/avr-g++ -Wall -Wextra -fno-strict-aliasing
-fwrapv -fno-aggressive-loop-optimizations -Os t.c -o t.S -S -v
Using built-in specs.
Reading specs from
/Users/michael/bin/gcc-trunk-20160511-avr/lib/gcc/avr/7.0.0/device-specs/specs-avr2
COLLECT_GCC=/Users/michael/bin/gcc-trunk-20160511-avr/bin/avr-g++
Target: avr
Configured with: ../configure
--prefix=/Users/michael/bin/gcc-trunk-20160511-avr
--with-gmp=/Users/michael/bin/gcc-6.1.0-avr
--with-mpfr=/Users/michael/bin/gcc-6.1.0-avr
--with-mpc=/Users/michael/bin/gcc-6.1.0-avr --target=avr
--enable-languages=c,c++ --disable-nls --disable-libssp --with-dwarf2
Thread model: single
gcc version 7.0.0 20160511 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-Wall' '-Wextra' '-fno-strict-aliasing' '-fwrapv'
'-fno-aggressive-loop-optimizations' '-Os' '-o' 't.S' '-S' '-v'
'-specs=device-specs/specs-avr2'
/Users/michael/bin/gcc-trunk-20160511-avr/libexec/gcc/avr/7.0.0/cc1plus -quiet
-v t.c -mn-flash=6 -mskip-bug -quiet -dumpbase t.c -auxbase-strip t.S -Os -Wall
-Wextra -version -fno-strict-aliasing -fwrapv
-fno-aggressive-loop-optimizations -o t.S -mn-flash=6 -mskip-bug -fno-rtti
-fno-enforce-eh-specs -fno-exceptions
GNU C++14 (GCC) version 7.0.0 20160511 (experimental) (avr)
compiled by GNU C version 4.2.1 Compatible Apple LLVM 7.3.0
(clang-703.0.29), GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl
version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
ignoring nonexistent directory
"/Users/michael/bin/gcc-trunk-20160511-avr/lib/gcc/avr/7.0.0/../../../../avr/include/c++/7.0.0"
ignoring nonexistent directory
"/Users/michael/bin/gcc-trunk-20160511-avr/lib/gcc/avr/7.0.0/../../../../avr/include/c++/7.0.0/avr"
ignoring nonexistent directory
"/Users/michael/bin/gcc-trunk-20160511-avr/lib/gcc/avr/7.0.0/../../../../avr/include/c++/7.0.0/backward"
ignoring nonexistent directory
"/Users/michael/bin/gcc-trunk-20160511-avr/lib/gcc/avr/7.0.0/../../../../avr/sys-include"
ignoring nonexistent directory
"/Users/michael/bin/gcc-trunk-20160511-avr/lib/gcc/avr/7.0.0/../../../../avr/include"
#include "..." search starts here:
#include <...> search starts here:
/Users/michael/bin/gcc-trunk-20160511-avr/lib/gcc/avr/7.0.0/include
/Users/michael/bin/gcc-trunk-20160511-avr/lib/gcc/avr/7.0.0/include-fixed
End of search list.
GNU C++14 (GCC) version 7.0.0 20160511 (experimental) (avr)
compiled by GNU C version 4.2.1 Compatible Apple LLVM 7.3.0
(clang-703.0.29), GMP version 6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl
version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 1b5e53108dfd5a746e8d5a73cd24bdb2
COMPILER_PATH=/Users/michael/bin/gcc-trunk-20160511-avr/libexec/gcc/avr/7.0.0/:/Users/michael/bin/gcc-trunk-20160511-avr/libexec/gcc/avr/7.0.0/:/Users/michael/bin/gcc-trunk-20160511-avr/libexec/gcc/avr/:/Users/michael/bin/gcc-trunk-20160511-avr/lib/gcc/avr/7.0.0/:/Users/michael/bin/gcc-trunk-20160511-avr/lib/gcc/avr/
LIBRARY_PATH=/Users/michael/bin/gcc-trunk-20160511-avr/lib/gcc/avr/7.0.0/
COLLECT_GCC_OPTIONS='-Wall' '-Wextra' '-fno-strict-aliasing' '-fwrapv'
'-fno-aggressive-loop-optimizations' '-Os' '-o' 't.S' '-S' '-v'
'-specs=device-specs/specs-avr2'
# grep -4 rjmp t.S
.L__stack_usage = 0
lds r24,1
sbrs r24,0
.L4:
rjmp .L4
.L5:
ldi r24,0
ldi r25,0
/* epilogue start */
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Subject: [Bug tree-optimization/69848] poor vectorization of a loop from SPEC2006 464.h264ref
Date: Wed, 11 May 2016 11:41:00 -0000
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amker at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |amker at gcc dot gnu.org
--- Comment #7 from amker at gcc dot gnu.org ---
(In reply to Jim Wilson from comment #6)
> Testing the vcond_mask* patch with make check gave 6 regressions for both
> armhf and aarch64.
>
> FAIL: gcc.dg/vect/pr65947-10.c (internal compiler error)
> FAIL: gcc.dg/vect/pr65947-10.c (test for excess errors)
> FAIL: gcc.dg/vect/pr65947-10.c scan-tree-dump-times vect "LOOP VECTORIZED" 2
> FAIL: gcc.dg/vect/pr65947-10.c -flto -ffat-lto-objects (internal compiler
> error)
> FAIL: gcc.dg/vect/pr65947-10.c -flto -ffat-lto-objects (test for excess
> errors)
> FAIL: gcc.dg/vect/pr65947-10.c -flto -ffat-lto-objects scan-tree-dump-times
> vec
> t "LOOP VECTORIZED" 2
>
> The problem here looks like a flaw in the vcond* patterns. They support int
> and fp compare operands, but only int selection operands. E.g. for
> (A op B ? X : Y)
> A and B can be either int or fp, but X and Y can only be int. Adding the
> vcond_mask* patterns apparently causes gcc to call vcond* in ways it didn't
> before, and that exposes the problem.
>
> The x86 port is the only port with vcond and vcond_mask patterns, and it
> supports all four combinations if int/fp compare/select operands, so it
> appears that aarch64 should also.
>
> I will need time to figure out how to fix the vcond* problems before I can
> formally submit the vcond_mask* patch.
Hi Jim,
We have a patch which supports all vcond/vcondu patterns (AArch64 yet)
including missing ones. The patch also introduces vec_cmp&vcond_mask because
it re-implements vcond/vcondu using these two patterns. It will be ready for
review shortly, but this issue itself needs vectorizer fix I think.
>From gcc-bugs-return-524825-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 11:50:47 2016
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Subject: [Bug target/71061] [ARM] is not setting instruction length for pop* patterns
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Jiong Wang <jiwang at gcc dot gnu.org> changed:
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>From gcc-bugs-return-524824-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 11:50:09 2016
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Subject: [Bug target/71061] New: [ARM] is not setting instruction length for pop* patterns
Date: Wed, 11 May 2016 11:50:00 -0000
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Bug ID: 71061
Summary: [ARM] is not setting instruction length for pop*
patterns
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: minor
Priority: P3
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Target: arm*
This is causing wrong size calculation and may affect some rtl pass, for
example bb-order where copy_bb_p needs accurate insn length info.
This have eventually part of the reason for
https://gcc.gnu.org/ml/gcc-patches/2016-05/msg00639.html where bb-order failed
to do the bb copy.
For the fix, I think we should extend arm_attr_length_push_multi to pop*
pattern.
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Subject: [Bug tree-optimization/71006] [6/7 Regression] ICE: verify_gimple failed (error: type mismatch in conditional expression) w/ -O1 -ftree-loop-vectorize
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Ilya Enkovich <ienkovich at gcc dot gnu.org> changed:
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--- Comment #2 from Ilya Enkovich <ienkovich at gcc dot gnu.org> ---
Looking at it
>From gcc-bugs-return-524827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 12:04:45 2016
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Subject: [Bug c/70255] change of the order of summation of floating point numbers despite no-associative-math
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--- Comment #18 from shatz at dsit dot co.il ---
(In reply to Manuel López-Ibáñez from comment #15)
> (In reply to shatz from comment #14)
> > It is not documented that __attribute__((optimize(""))) works reliably when
>
> Unfortunately, you should not expect the optimize attribute to work
> reliably: https://gcc.gnu.org/wiki/FAQ#optimize_attribute_broken
Regular users like me don't read this page and probable can't be realistically
expected to read it.
So, if the situation is really as bad as mentioned there, it should be
mentioned in the places that users do read.
Like these:
https://gcc.gnu.org/onlinedocs/gcc-5.3.0/gcc/Function-Attributes.html#Function-Attributes
https://gcc.gnu.org/onlinedocs/gcc-6.1.0/gcc/Common-Function-Attributes.html#Common-Function-Attributes
>From gcc-bugs-return-524828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 12:06:20 2016
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Subject: [Bug tree-optimization/70986] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in combine_blocks, at tree-if-conv.c:2219
Date: Wed, 11 May 2016 12:06:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Other loop opts don't necessarily like this (I get regressions).
>From gcc-bugs-return-524829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 12:40:14 2016
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Subject: [Bug libstdc++/71049] [6/7 Regression] libstdc++ fails to build --with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed May 11 12:39:28 2016
New Revision: 236118
URL: https://gcc.gnu.org/viewcvs?rev=236118&root=gcc&view=rev
Log:
libstdc++/71049 fix --disable-libstdcxx-dual-abi bootstrap
PR libstdc++/71049
* src/c++11/cow-stdexcept.cc [!_GLIBCXX_USE_DUAL_ABI]: Don't define
exception constructors with __sso_string parameters.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/src/c++11/cow-stdexcept.cc
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Subject: [Bug c++/71024] Missing warning for contradictory attributes
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Testing a patch.
>From gcc-bugs-return-524831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 13:12:59 2016
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Subject: [Bug c/70255] change of the order of summation of floating point numbers despite no-associative-math
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--- Comment #19 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Markus recently committed a patch (r235580) that points out that this attribute
should only be used for debugging.
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Subject: [Bug fortran/70855] [6/7 Regression] ICE with -fopenmp in gfc_trans_omp_workshare(): Bad statement code
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed May 11 13:16:48 2016
New Revision: 236119
URL: https://gcc.gnu.org/viewcvs?rev=236119&root=gcc&view=rev
Log:
PR fortran/70855
* frontend-passes.c (inline_matmul_assign): Disable in !$omp workshare.
* gfortran.dg/gomp/pr70855.f90: New test.
Added:
trunk/gcc/testsuite/gfortran.dg/gomp/pr70855.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/frontend-passes.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/70855] [6/7 Regression] ICE with -fopenmp in gfc_trans_omp_workshare(): Bad statement code
Date: Wed, 11 May 2016 13:18:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed May 11 13:18:05 2016
New Revision: 236120
URL: https://gcc.gnu.org/viewcvs?rev=236120&root=gcc&view=rev
Log:
PR fortran/70855
* frontend-passes.c (inline_matmul_assign): Disable in !$omp workshare.
* gfortran.dg/gomp/pr70855.f90: New test.
Added:
branches/gcc-6-branch/gcc/testsuite/gfortran.dg/gomp/pr70855.f90
Modified:
branches/gcc-6-branch/gcc/fortran/ChangeLog
branches/gcc-6-branch/gcc/fortran/frontend-passes.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/71050] [7 regression] test case gcc.target/powerpc/lhs-1.c fails starting with r236066
Date: Wed, 11 May 2016 13:50:00 -0000
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dje at gcc dot gnu.org,
| |segher at gcc dot gnu.org
--- Comment #2 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Yes, the test using -mcpu=power5 means we don't have direct moves between FPRs
and GPRs, so the move has to go through memory, which is what this appears to
have been designed to test. But now we are storing the value twice, once in
its original location and once in a stack temp, and we have lost the ability to
just do a load-word instead of a load-doubleword/shift.
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Subject: [Bug tree-optimization/71050] [7 regression] test case gcc.target/powerpc/lhs-1.c fails starting with r236066
Date: Wed, 11 May 2016 13:52:00 -0000
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--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Sorry, accidentally saved before finishing my thoughts.
How do we "inform" the middle-end that a DI subreg of a DF is very expensive?
This differs wildly by processor for us. We "can" always do the subreg, it's
just that on older processors we do it in a horrible way.
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Subject: [Bug debug/71057] [6 Regression] ICE in schedule_generic_params_dies_gen, at dwarf2out.c:24142
Date: Wed, 11 May 2016 14:00:00 -0000
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--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 11 13:59:34 2016
New Revision: 236121
URL: https://gcc.gnu.org/viewcvs?rev=236121&root=gcc&view=rev
Log:
2016-05-11 Richard Biener <rguenther@suse.de>
PR debug/71057
* dwarf2out.c (retry_incomplete_types): Set early_dwarf.
(dwarf2out_finish): Move retry_incomplete_types call ...
(dwarf2out_early_finish): ... here.
* g++.dg/debug/pr71057.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/debug/pr71057.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dwarf2out.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug debug/71057] [6 Regression] ICE in schedule_generic_params_dies_gen, at dwarf2out.c:24142
Date: Wed, 11 May 2016 14:00:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |7.0
Summary|[6/7 Regression] ICE in |[6 Regression] ICE in
|schedule_generic_params_die |schedule_generic_params_die
|s_gen, at dwarf2out.c:24142 |s_gen, at dwarf2out.c:24142
Known to fail| |6.1.0
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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Subject: [Bug tree-optimization/71055] [7 Regression] FAIL: gcc.dg/torture/pr53663-1.c -Os execution test
Date: Wed, 11 May 2016 14:05:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed May 11 14:04:32 2016
New Revision: 236122
URL: https://gcc.gnu.org/viewcvs?rev=236122&root=gcc&view=rev
Log:
2016-05-11 Richard Biener <rguenther@suse.de>
PR tree-optimization/71055
* tree-ssa-sccvn.c (vn_reference_lookup_3): When native-interpreting
sth with precision not equal to access size verify we don't chop
off bits.
* gcc.dg/torture/pr71055.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr71055.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug tree-optimization/71055] [7 Regression] FAIL: gcc.dg/torture/pr53663-1.c -Os execution test
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug target/70904] ICE: Max. number of generated reload insns per insn is achieved (90) with -fno-split-wide-types @ aarch64
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Vladimir Makarov <vmakarov at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vmakarov at gcc dot gnu.org
--- Comment #3 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Jiong Wang from comment #2)
> (In reply to Zdenek Sojka from comment #0)
> > Created attachment 38393 [details]
> > reduced testcase
> >
> > Compiler output:
> > $ aarch64-unknown-linux-gnu-gcc -O -fno-split-wide-types testcase.c
> > testcase.c: In function 'foo':
> > testcase.c:8:1: internal compiler error: Max. number of generated reload
> > insns per insn is achieved (90)
> >
> > }
> > ^
> > 0x9dafa9 lra_constraints(bool)
> > /repo/gcc-trunk/gcc/lra-constraints.c:4440
> > 0x9c63dc lra(_IO_FILE*)
> > /repo/gcc-trunk/gcc/lra.c:2290
> > 0x96de19 do_reload
> > /repo/gcc-trunk/gcc/ira.c:5425
> > 0x96de19 execute
> > /repo/gcc-trunk/gcc/ira.c:5609
>
> From rtl dump, reload is trying to insert the following reload insn
>
> r93:OI = r80:OI
>
> r93 is with general register class and r80 is with vector register
> class. r93 was created to meet the constraint inside insn 17, and was to
> replace the vector register r80 inside the subreg, as vector register
> can't be used as index register.
>
> (insn 17 11 20 2 (set (mem:SI (plus:DI (sign_extract:DI (mult:DI (subreg:DI
> (reg:OI 80 [ D.2754 ]) 0)
> (const_int 4 [0x4]))
> (const_int 34 [0x22])
> (const_int 0 [0]))
> (reg/f:DI 83)) [1 *_9+0 S4 A32])
> (const_int 0 [0])) bug-1.c:7 49 {*movsi_aarch64}
>
> reload here is trying to reload the inner register r80 instead of the whole
> subreg,
> thus creating a new "OImode (vector register)" to "OImode (general register"
> move
> which can't be supported in hardware and caused further endless reload.
>
> For mode with size bigger than word_mode, there won't be "mov" between
> two registers with different classes, but there normally will be "mov"
> which transfers element of vector register into the general register, and
> this normally will be a subreg.
>
> So I think we should teach reload about this to reload the whole subreg
> if above conditions met.
>
> Comments?
>
> (CCed RA maintainer Vlad)
>
> diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
> index 14d5f1d..0ca7a7d 100644
> --- a/gcc/lra-constraints.c
> +++ b/gcc/lra-constraints.c
> @@ -1307,7 +1307,15 @@ process_addr_reg (rtx *loc, bool check_only_p,
> rtx_insn **before, rtx_insn **aft
>
> subreg_p = GET_CODE (*loc) == SUBREG;
> if (subreg_p)
> - loc = &SUBREG_REG (*loc);
> + {
> + reg = SUBREG_REG (*loc);
> + mode = GET_MODE (reg);
> +
> + if (in_class_p (reg, cl, &new_class)
> + || GET_MODE_SIZE (mode) <= GET_MODE_SIZE (word_mode))
> + loc = &SUBREG_REG (*loc);
> + }
> +
> reg = *loc;
> mode = GET_MODE (reg);
> if (! REG_P (reg))
In general the patch looks ok for me. It is probably the right place to fix
it. I'd add a comment for condition of checking the mode size and use ptr_mode
instead of word_mode.
With these changes the patch is ok for me. Of course, you need to test it also
on x86-64 (especially on GCC testsuite). Even if it looks ok to me, the
reality can be different because LRA/reload works with many target details
whose interaction is very hard to predict.
Jiong, thank you for working on this PR.
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Subject: [Bug c++/71054] [6/7 Regression] ICE: in expand_expr_real_2, at expr.c:8097
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--- Comment #5 from Kai Tietz <ktietz at gcc dot gnu.org> ---
it is a duplicate.
*** This bug has been marked as a duplicate of bug 70869 ***
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
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Kai Tietz <ktietz at gcc dot gnu.org> changed:
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--- Comment #6 from Kai Tietz <ktietz at gcc dot gnu.org> ---
*** Bug 71054 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-524843-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 14:11:07 2016
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
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--- Comment #7 from Kai Tietz <ktietz at gcc dot gnu.org> ---
Created attachment 38469
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38469&action=edit
suggested patch
This fixes the issue for me. Additionally this change addresse reported issue
for PR 71029, which was about too long folding about OBJ_TYPE_REFs.
>From gcc-bugs-return-524844-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 14:12:49 2016
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Subject: [Bug driver/68463] Offloading fails when some objects are compiled with LTO and some without
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Thomas Schwinge <tschwinge at gcc dot gnu.org> changed:
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| |tschwinge at gcc dot gnu.org
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--- Comment #6 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
Per
<http://news.gmane.org/find-root.php?message_id=%3C573200B5.7050302%40codesourcery.com%3E>:
PowerPC GNU/Linux target fixed on trunk in r236098; still needs to be fixed on
gcc-6-branch.
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Comment on attachment 38469
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38469
suggested patch
DECL_P check doesn't make sense, of course all VAR_Ps are also DECL_Ps, but no
need to verify that. Why the OBJ_TYPE_REF change?
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
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--- Comment #9 from Kai Tietz <ktietz at gcc dot gnu.org> ---
Created attachment 38470
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updated patch
Well, DECL_P check is indeed superfluous, but I added to point out we are
checking here for declarations. but VAR_P should be indeed enough.
The OBJ_TYPE_REF hunk is related to PR/71029, and can be ignored. I removed it
from update.
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Subject: [Bug target/70809] [AArch64] aarch64_vmls pattern should be rejected if -ffp-contract=off
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ktkachov at gcc dot gnu.org changed:
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
I'm testing a patch to remove that pattern.
If -ffp-contract=fast then an fma operation will be generated so we'll get the
fmls anyway.
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Subject: [Bug target/69979] ARM naked function attribute not handling structs bigger than 32 bits correctly
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Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2016-05-11
Resolution|INVALID |---
Ever confirmed|0 |1
--- Comment #4 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
Reopening given last comment - there seems to be something more to dig into
here.
>From gcc-bugs-return-524849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 15:21:03 2016
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From: "andre.simoesdiasvieira at arm dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/71062] New: [bugzilla] r235622 and restrict pointers
Date: Wed, 11 May 2016 15:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71062
Bug ID: 71062
Summary: [bugzilla] r235622 and restrict pointers
Product: gcc
Version: 7.0
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Hi there,
I have encountered a new FAIL when testing newlib-nano for the arm-none-eabi
toolchain which I believe is caused by a change in code generation for
freopen.c.
After some investigation I was able to trace the issue back to a pointer
comparison with a restrict qualified pointer. See below a small piece of code
that illustrates the issue.
$cat t.c
extern const char bar;
int
foo (register char *__restrict p)
{
if (p == &bar)
return 1;
return 0;
}
Since revision r235622, the pointer comparison here is evaluated to false
during compilation and the whole basic block is optimized away.
After some inner struggle and quite a few passes over the restrict definition
in the C99 standard(Committee Draft -- April 12, 2011, N1570) I think this
assumption that p and &bar can't point to the same object might be invalid.
Yes, the C-standard defines the '&' operator to yield a pointer to the object.
Though the formal definition of restrict only seems to apply to the
dereferencing of pointers. In this case, we do not dereference the pointer
created by '&bar' and thus do not access the object that 'p' might be pointing
to.
Does my reasoning make sense? I find it quite difficult to wrap my head around
the definition of restrict.
Cheers,
Andre
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/71050] [7 regression] test case gcc.target/powerpc/lhs-1.c fails starting with r236066
Date: Wed, 11 May 2016 15:23:00 -0000
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On May 11, 2016 3:52:43 PM GMT+02:00, "wschmidt at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71050
>
>--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
>Sorry, accidentally saved before finishing my thoughts.
>
>How do we "inform" the middle-end that a DI subreg of a DF is very
>expensive?
I have the same question.
>This differs wildly by processor for us. We "can" always do the
>subreg, it's
>just that on older processors we do it in a horrible way.
But it seems you do that during reload only? OTOH not exposing the memory
temporary is probably done to help combine which would be confused by memory
and because getting rid of the memory slot is not possible later.
Catch-22 ...
Note we exposed DF to DI subregs similarly before.
We expose vector element extracts the same way.
So I'm looking for a way to compose a predicate for what kind of 'subregs' are
undesirable (those that need to go through memory). Given the expander choice
there likely is no such predicate today.
Richard.
>From gcc-bugs-return-524851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 15:24:58 2016
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Subject: [Bug middle-end/71062] [7 regression] r235622 and restrict pointers
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Andre Vieira <andre.simoesdiasvieira at arm dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |arm
Summary|[bugzilla] r235622 and |[7 regression] r235622 and
|restrict pointers |restrict pointers
--- Comment #1 from Andre Vieira <andre.simoesdiasvieira at arm dot com> ---
Register keyword here is superfluous. It is all down to the restrict keyword.
>From gcc-bugs-return-524852-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 15:31:54 2016
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Subject: [Bug driver/71063] New: ICE: Segmentation fault with --help="^"
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71063
Bug ID: 71063
Summary: ICE: Segmentation fault with --help="^"
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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gcc --help="^"
ICEs with:
cc1: internal compiler error: Segmentation fault
0xae26d2 crash_signal
$SRC/gcc/toplev.c:333
0x11da90c common_handle_option(gcc_options*, gcc_options*, cl_decoded_option
const*, unsigned int, int, unsigned int, cl_option_handlers const*,
diagnostic_context*)
$SRC/gcc/opts.c:1615
0x11dde00 handle_option
$SRC/gcc/opts-common.c:981
0x11ddf98 read_cmdline_option(gcc_options*, gcc_options*, cl_decoded_option*,
unsigned int, unsigned int, cl_option_handlers const*, diagnostic_context*)
$SRC/gcc/opts-common.c:1180
0xa16f22 read_cmdline_options
$SRC/gcc/opts-global.c:229
0xa16f22 decode_options(gcc_options*, gcc_options*, cl_decoded_option*,
unsigned int, unsigned int, diagnostic_context*)
$SRC/gcc/opts-global.c:308
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.
ICEs at least as far back as 4.6
>From gcc-bugs-return-524853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 15:35:37 2016
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Subject: [Bug driver/71063] ICE: Segmentation fault with --help="^"
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-11
CC| |mpolacek at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Heh, confirmed.
>From gcc-bugs-return-524855-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 15:49:30 2016
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Subject: [Bug target/70830] [6/7 Regression] ARM interrupt attribute: push/pop do not support {reglist}^
Date: Wed, 11 May 2016 15:49:00 -0000
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--- Comment #4 from ktkachov at gcc dot gnu.org ---
Patch posted at:
https://gcc.gnu.org/ml/gcc-patches/2016-05/msg00395.html
>From gcc-bugs-return-524854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 15:49:19 2016
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug other/71064] New: nvptx offloading: "long double" data type
Date: Wed, 11 May 2016 15:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71064
Bug ID: 71064
Summary: nvptx offloading: "long double" data type
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: openacc
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
CC: amonakov at gcc dot gnu.org, bernds at gcc dot gnu.org,
jakub at gcc dot gnu.org, nathan at gcc dot gnu.org
Blocks: 70945
Target Milestone: ---
Offloading to nvptx (that is, OpenACC only, currently) does not support the
"long double" data type:
int main()
{
long double ld;
#pragma acc parallel copyout(ld)
ld = 0.0L;
if (ld != 0.0L)
__builtin_abort();
return 0;
}
... results in: "lto1: fatal error: unsupported mode XF".
The PTX ISA does not support a floating point data type with more than 64-bits.
(It's generally tuned for speed instead of precision, and does not strive for
full IEEE-754 conformance.)
We can either continue to error out (in a more user-friendly way). Or,
(perhaps only for "-ffast-math" or similar?) implement "long double" with the
maximum available precision (that is, that of "double"; this will require
conversion at run time of "long double" values at the offloading boundary),
whilst perhaps emitting a warning about the reduced precision. Unless that's
what's required because GCC generally does it that way, it does not appear
appealing to add a lot of "soft-fp" support code to emulate the target's
higher-precision "long double" data type for the nvptx offloading target.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70945
[Bug 70945] Offloading: compatibility of target and offloading toolchains
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Subject: [Bug driver/71063] ICE: Segmentation fault with --help="^"
Date: Wed, 11 May 2016 15:57:00 -0000
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #2 from ktkachov at gcc dot gnu.org ---
The bug in opts.c is:
if (* a == '^')
{
++ a;
pflags = & exclude_flags;
}
else
pflags = & include_flags;
comma = strchr (a, ',');
if (comma == NULL)
len = strlen (a);
else
len = comma - a;
if (len == 0)
{
a = comma + 1;
continue;
}
For "^" a is advanced to "", 'comma' after the strchr is NULL, 'len' is
therefore 0 but then a is set to comma + 1, which is invalid and is dereference
at the top of the loop.
>From gcc-bugs-return-524857-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 16:03:15 2016
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Subject: [Bug driver/71063] ICE: Segmentation fault with --help="^"
Date: Wed, 11 May 2016 16:03:00 -0000
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
FWIW, my fix was
--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -1641,6 +1641,11 @@ common_handle_option (struct gcc_options *opts,
{
++ a;
pflags = & exclude_flags;
+ if (*a == '\0')
+ {
+ error_at (loc, "missing argument to %qs", "--help=^");
+ break;
+ }
}
else
pflags = & include_flags;
>From gcc-bugs-return-524858-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 16:04:14 2016
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From: "amonakov at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/71065] New: Missing diagnostic for statements between OpenMP 'target' and 'teams'
Date: Wed, 11 May 2016 16:04:00 -0000
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Bug ID: 71065
Summary: Missing diagnostic for statements between OpenMP
'target' and 'teams'
Product: gcc
Version: 6.0
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Keywords: accepts-invalid, openmp
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OpenMP 4.5 says (4.0 had a similar restriction, sans 'declarations'):
If specified, a teams construct must be contained within a target construct.
That target construct must contain no statements, declarations or directives
outside of the teams construct.
As a result GCC should reject this:
void f()
{
#pragma omp target
{
asm("");
#pragma omp teams
;
}
}
(as I understand, 'if' clause on the 'target' pragma allows the user to run
their code in the target region prior to entering 'teams' region anyway, but
still diagnosing the above should be useful)
>From gcc-bugs-return-524859-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 16:11:17 2016
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Subject: [Bug driver/71063] ICE: Segmentation fault with --help="^"
Date: Wed, 11 May 2016 16:11:00 -0000
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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--- Comment #4 from ktkachov at gcc dot gnu.org ---
(In reply to Marek Polacek from comment #3)
> FWIW, my fix was
>
> --- a/gcc/opts.c
> +++ b/gcc/opts.c
> @@ -1641,6 +1641,11 @@ common_handle_option (struct gcc_options *opts,
> {
> ++ a;
> pflags = & exclude_flags;
> + if (*a == '\0')
> + {
> + error_at (loc, "missing argument to %qs", "--help=^");
> + break;
> + }
> }
> else
> pflags = & include_flags;
Ah, this looks a bit cleaner and shorter than what I had in mind.
Would you mind testing/submitting yours instead?
>From gcc-bugs-return-524860-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 16:22:45 2016
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Subject: [Bug driver/71063] ICE: Segmentation fault with --help="^"
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Sure, and sorry for duplicated work. Now how to test this properly in
gcc.misc-tests/help.exp...
>From gcc-bugs-return-524861-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 16:31:06 2016
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Subject: [Bug driver/71063] ICE: Segmentation fault with --help="^"
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--- Comment #6 from ktkachov at gcc dot gnu.org ---
(In reply to Marek Polacek from comment #5)
> Sure, and sorry for duplicated work. Now how to test this properly in
> gcc.misc-tests/help.exp...
Thanks.
Ah, I was not aware of gcc.misc-tests/help.exp
I was just planning to add a single "int a;" in dg.exp and look for dg-error
counting on it ICEing when the bug manifests.
But I suppose help.exp should be the canonical place for these...
>From gcc-bugs-return-524862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 17:07:56 2016
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Subject: [Bug other/71064] nvptx offloading: "long double" data type
Date: Wed, 11 May 2016 17:07:00 -0000
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--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
> (It's generally tuned for speed instead of precision, and does not strive for full IEEE-754 conformance.)
(PTX is an abstract ISA, if it's tuned for anything it's the simplicity of
abstraction and matching for the underlying GPU ISA well enough; why do you
claim it doesn't strive for IEEE-754 conformance? if you look at the PTX ISA
spec, you'll see remarks on compliance, such as full compliance for +-*/ sqrt
fma on recent hardware implementations; supporting extended fp types is
optional).
Compilation can succeed if 'double' and 'long double' happen to be binary
compatible, like what offloading from ARM would have. Otherwise, diagnosing
that as a target compiler error is the right thing to do. Falling back is not
practical, because in the general case the boundary the double<->long double
translation would need to happen is: individual memory accesses in offloaded
code.
An exception are situations where data in 'long double' type is never exchanged
across the host-device boundary: all long double variables referenced in the
target region are private to it. You still need to make sure that sizeof(long
double) matches, but then on memory accesses you can load/store leftmost 8
bytes (of 16) into a PTX register and operate on it.
>From gcc-bugs-return-524863-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 17:08:23 2016
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/71024] Missing warning for contradictory attributes
Date: Wed, 11 May 2016 17:08:00 -0000
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Wed May 11 17:07:37 2016
New Revision: 236129
URL: https://gcc.gnu.org/viewcvs?rev=236129&root=gcc&view=rev
Log:
PR c++/71024
* c-common.c (diagnose_mismatched_attributes): New function.
* c-common.h (diagnose_mismatched_attributes): Declare.
* c-decl.c (diagnose_mismatched_decls): Factor out code to
diagnose_mismatched_attributes and call it.
* decl.c (duplicate_decls): Call diagnose_mismatched_decls.
* c-c++-common/attributes-3.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/attributes-3.c
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-common.c
trunk/gcc/c-family/c-common.h
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/71024] Missing warning for contradictory attributes
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug fortran/56765] [OOP] compilation errors/ICE with polymorphic array
Date: Wed, 11 May 2016 17:21:00 -0000
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--- Comment #6 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
On my environment, all tests compile now without an ICE.
(also tested with several other compile options)
$ gfortran-6 --version
GNU Fortran (SUSE Linux) 6.1.1 20160502 [gcc-6-branch revision 235698]
$ gfortran-6 -Wall -Wextra pr56765_comment0_t2.f90
$ a.out
$ gfortran-6 -Wall -Wextra pr56765_comment0_t3.f90
pr56765_comment0_t3.f90:4:4:
u => sub()
1
Error: Different ranks in pointer assignment at (1)
$ gfortran-6 -Wall -Wextra pr56765_comment4.f90
$ a.out
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/71006] [6/7 Regression] ICE: verify_gimple failed (error: type mismatch in conditional expression) w/ -O1 -ftree-loop-vectorize
Date: Wed, 11 May 2016 17:23:00 -0000
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Chengnian Sun <chengniansun at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |chengniansun at gmail dot com
--- Comment #3 from Chengnian Sun <chengniansun at gmail dot com> ---
Hi,
Can you help check whether the following test case is a duplicate? Thanks.
$: 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/7.0.0/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 7.0.0 20160511 (experimental) [trunk revision 236116] (GCC)
$:
$: gcc-trunk -O1 small.c
small.c: In function ‘fn1_BOUOUtg_1828_f2’:
small.c:2:6: error: type mismatch in binary expression
void fn1_BOUOUtg_1828_f2() {
^~~~~~~~~~~~~~~~~~~
int
int
unsigned int
_4 = a.0_1 ^ b.2_6;
small.c:2:6: internal compiler error: verify_gimple failed
0xbfe24f verify_gimple_in_cfg(function*, bool)
../../gcc-source-trunk/gcc/tree-cfg.c:5166
0xaeca62 execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1964
0xaed45b execute_todo
../../gcc-source-trunk/gcc/passes.c:2016
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.
$:
$: cat small.c
int a, b;
void fn1_BOUOUtg_1828_f2() {
unsigned c = 8 < 10;
int d = fn1_BOUOUtg_1828_f2 || 8;
b = d ^ a ^ c ^ b;
}
int main() { return 0; }
$:
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/57197] [Fortran-Dev][Regression] ICE in record_reference, at cgraphbuild.c:66
Date: Wed, 11 May 2016 17:24:00 -0000
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--- Comment #2 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
For me, test compiles now without ICE -- same with "use thing" added.
$ gfortran-6 --version
GNU Fortran (SUSE Linux) 6.1.1 20160502 [gcc-6-branch revision 235698]
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From: "gerhard.steinmetz.fortran@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/71066] New: ICE in set_loop_bounds, at fortran/trans-array.c:4680
Date: Wed, 11 May 2016 17:26:00 -0000
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Bug ID: 71066
Summary: ICE in set_loop_bounds, at fortran/trans-array.c:4680
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This first example is partially related to pr50410 :
$ cat z1.f90
program p
type t
real, allocatable :: a(:,:)
end type
type(t), pointer :: x
data x%a / 1.0 /
end
$ gfortran-6 z1.f90
internal compiler error: in set_loop_bounds, at fortran/trans-array.c:4680
---
Another situation :
$ cat z3.f90
program p
real :: a(2,2)[*]
data a /4*0.0/
end
$ gfortran-6 -fcoarray=single z3.f90
$ gfortran-6 -fcoarray=lib z3.f90
internal compiler error: in set_loop_bounds, at fortran/trans-array.c:4680
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Subject: [Bug fortran/71067] New: ICE on data initialization with insufficient value or wrong boz-constants
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Bug ID: 71067
Summary: ICE on data initialization with insufficient value or
wrong boz-constants
Product: gcc
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With a missing parameter attribute, or value not initialized :
$ cat z1.f90
program p
integer :: i = 0
integer :: z(2)
data z /2*i/
end
$ gfortran-6 z1.f90
f951: internal compiler error: free_expr0(): Bad expr type
$ cat z2.f90
program p
integer :: i, z(2)
data z /2*i/
end
$ gfortran-6 z2.f90
f951: internal compiler error: free_expr0(): Bad expr type
Incidentally observed, with wrong boz-constants :
$ cat z4.f90
program p
integer :: a(2), b(2), c(2)
data a /2*b1'/
data b /2*o1'
data c /2*z1
end
$ gfortran-6 z4.f90
f951: internal compiler error: free_expr0(): Bad expr type
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Subject: [Bug fortran/71067] ICE on data initialization with insufficient value or wrong boz-constants
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--- Comment #1 from Gerhard Steinmetz <gerhard.steinmetz.fortran@t-online.de> ---
A) correct with parameter :
$ cat z3.f90
program p
integer, parameter :: i = 0
integer :: z(2)
data z /2*i/
print *, z
end
$ gfortran-6 z3.f90
$ a.out
0 0
B) wrong code detected with scalars :
$ cat z5.f90
program p
integer :: a, b, c
data a /b1'/
data b /o1'
data c /z1
end
$ gfortran-6 z5.f90
z5.f90:3:13:
data a /b1'/
1
Error: Symbol ‘b1’ must be a PARAMETER in DATA statement at (1)
z5.f90:4:13:
data b /o1'
1
Error: Symbol ‘o1’ must be a PARAMETER in DATA statement at (1)
z5.f90:5:13:
data c /z1
1
Error: Symbol ‘z1’ must be a PARAMETER in DATA statement at (1)
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/71068] New: ICE in check_data_variable(): Bad expression
Date: Wed, 11 May 2016 17:34:00 -0000
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Bug ID: 71068
Summary: ICE in check_data_variable(): Bad expression
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With this wrong code :
$ cat z1.f90
program p
integer :: a(2)[*]
data a(1)[1] /1/
data a(2)[1] /2/
end
$ gfortran-6 -fcoarray=lib z1.f90
f951: internal compiler error: check_data_variable(): Bad expression
Whereas :
$ gfortran-6 -fcoarray=single z1.f90
z1.f90:4:7:
data a(2)[1] /2/
1
Error: DATA element ‘a’ at (1) cannot have a coindex
z1.f90:3:7:
data a(1)[1] /1/
1
Error: DATA element ‘a’ at (1) cannot have a coindex
>From gcc-bugs-return-524872-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 17:41:51 2016
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From: "zeccav at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/70876] ICE in chkp_find_bounds: Unexpected tree code with_size_expr
Date: Wed, 11 May 2016 17:41:00 -0000
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--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> ---
Will you please check gcc 6.1 with your fix against bug 70877?
I get an ICE, could it be a regression?
gcc -fcheck-pointer-bounds -mmpx gccerr36.c
gccerr36.c: In function ‘bar’:
gccerr36.c:12:8: warning: function called through a non-compatible type
d = ((double (*) (int)) foo) (i);
~^~~~~~~~~~~~~~~~~~~~~~~
gccerr36.c: In function ‘bar.chkp’:
gccerr36.c:12:5: internal compiler error: in convert_move, at expr.c:268
d = ((double (*) (int)) foo) (i);
~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0x768d88 convert_move(rtx_def*, rtx_def*, int)
../../gcc-6.1.0/gcc/expr.c:268
0x76e585 store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
../../gcc-6.1.0/gcc/expr.c:5483
0x76e9ff expand_assignment(tree_node*, tree_node*, bool)
../../gcc-6.1.0/gcc/expr.c:5175
0x691b0c expand_call_stmt
../../gcc-6.1.0/gcc/cfgexpand.c:2658
0x691b0c expand_gimple_stmt_1
../../gcc-6.1.0/gcc/cfgexpand.c:3548
0x691b0c expand_gimple_stmt
../../gcc-6.1.0/gcc/cfgexpand.c:3714
0x6934a5 expand_gimple_basic_block
../../gcc-6.1.0/gcc/cfgexpand.c:5720
0x698386 execute
../../gcc-6.1.0/gcc/cfgexpand.c:6335
>From gcc-bugs-return-524873-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 17:43:24 2016
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/71062] [7 regression] r235622 and restrict pointers
Date: Wed, 11 May 2016 17:43:00 -0000
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--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
I don't think it's valid to optimize for comparisons, where dereference
doesn't occur, based on restrict; restrict is only about how an object is
accessed (and as long as the object doesn't get modified, multiple
pointers, restricted and otherwise, can be used to access it; it's only if
the object is modified[*] that the rules about restrict come into play).
[*] Including the deemed modifications from "Every access that modifies X
shall be considered also to modify P, for the purposes of this subclause."
to deal with multiple levels of restricted pointers.
>From gcc-bugs-return-524874-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 17:50:24 2016
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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++/71069] New: Extend -Wnonnull-compare to address of reference
Date: Wed, 11 May 2016 17:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71069
Bug ID: 71069
Summary: Extend -Wnonnull-compare to address of reference
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
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I had crash in optimized build because pointer check is skipped in next
situation (null pointer is sneaked into container):
void setData( Data &data ) {
_current_data = &data;
if ( _current_data )
_set_data.insert( _current_data );
}
I think will be good idea to report such situations in -Wnonnull-compare.
>From gcc-bugs-return-524875-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 18:13:10 2016
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Subject: [Bug target/71070] New: MPX gives a false positive when allocating a string longer than 16 bytes on the stack
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Bug ID: 71070
Summary: MPX gives a false positive when allocating a string
longer than 16 bytes on the stack
Product: gcc
Version: 6.1.0
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Created attachment 38471
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38471&action=edit
Preprocessed file
It works only if:
* it is a string, not an array of chars
* the string is longer than 16 bytes
* the string is allocated on the stack
For example, #BR is thrown in the following line:
string long_string("A long string with more than 16 symbols");
Full preprocessed source is attached.
System setup:
* GCC version: 6.1.0 (also appears with 5.3.0)
* the system type: Linux f8714f7988cf 4.2.0-35-generic #40-Ubuntu SMP Tue Mar
15 22:15:45 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
* Configured with: gcc/src/configure --enable-languages=c,c++
--disable-multilib --enable-libmpx
* Compilation flags: -O3 -fcheck-pointer-bounds -mmpx -lmpx
Output:
short string: short string
Allocated a big object
Saw a #BR! status 1 at 0x7f8eb754f148
That is, the last line is a false positive.
Full output with -v -save-temps:
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /root/bin/gcc/src/configure --enable-languages=c,c++
--disable-multilib --enable-libmpx : (reconfigured) ../src/configure
--enable-languages=c,c++ --disable-multilib --enable-libmpx
Thread model: posix
gcc version 5.3.0 (GCC)
COLLECT_GCC_OPTIONS='-O3' '-fcheck-pointer-bounds' '-mmpx' '-v' '-save-temps'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/cc1plus -E -quiet -v
-imultiarch x86_64-linux-gnu -D_GNU_SOURCE test.cpp -mmpx -mtune=generic
-march=x86-64 -fcheck-pointer-bounds -O3 -fpch-preprocess -o test.ii
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../../../x86_64-unknown-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../../../include/c++/5.3.0
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../../../include/c++/5.3.0/x86_64-unknown-linux-gnu
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../../../include/c++/5.3.0/backward
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/include
/usr/local/include
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-O3' '-fcheck-pointer-bounds' '-mmpx' '-v' '-save-temps'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/cc1plus -fpreprocessed
test.ii -quiet -dumpbase test.cpp -mmpx -mtune=generic -march=x86-64 -auxbase
test -O3 -version -fcheck-pointer-bounds -o test.s
GNU C++ (GCC) version 5.3.0 (x86_64-unknown-linux-gnu)
compiled by GNU C version 5.3.0, GMP version 5.1.3, MPFR version
3.1.2-p3, MPC version 1.0.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++ (GCC) version 5.3.0 (x86_64-unknown-linux-gnu)
compiled by GNU C version 5.3.0, GMP version 5.1.3, MPFR version
3.1.2-p3, MPC version 1.0.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 316654f71ace181278f48334ff2cbcb8
COLLECT_GCC_OPTIONS='-O3' '-fcheck-pointer-bounds' '-mmpx' '-v' '-save-temps'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
as -v --64 -o test.o test.s
GNU assembler version 2.26 (x86_64-pc-linux-gnu) using BFD version (GNU
Binutils) 2.26.20160125
COMPILER_PATH=/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/:/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/:/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/:/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/:/usr/local/lib/gcc/x86_64-unknown-linux-gnu/
LIBRARY_PATH=/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/:/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../../../lib64/:/lib/x86_64-linux-gnu/:/lib/../lib64/:/usr/lib/x86_64-linux-gnu/:/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../../:/lib/:/usr/lib/
Reading specs from
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../../../lib64/libmpx.spec
COLLECT_GCC_OPTIONS='-O3' '-fcheck-pointer-bounds' '-mmpx' '-v' '-save-temps'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/collect2 -plugin
/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/liblto_plugin.so
-plugin-opt=/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
-plugin-opt=-fresolution=test.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
--eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2
/usr/lib/x86_64-linux-gnu/crt1.o /usr/lib/x86_64-linux-gnu/crti.o
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/crtbegin.o
-L/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0
-L/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../../../lib64
-L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu
-L/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/../../.. test.o -lmpx
-lstdc++ -lm -lmpx -lmpxwrappers -z bndplt -lgcc_s -lgcc -lc -lgcc_s -lgcc
/usr/local/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/crtend.o
/usr/lib/x86_64-linux-gnu/crtn.o
short string: short string
Allocated a big object
Saw a #BR! status 1 at 0x7f3220319148
>From gcc-bugs-return-524876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 18:20:38 2016
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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++/71069] -Waddress didn't catch all cases
Date: Wed, 11 May 2016 18:20:00 -0000
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--- Comment #1 from Eugene Zelenko <eugene.zelenko at gmail dot com> ---
Sorry for mistake in original report. -Waddress should report such problems.
>From gcc-bugs-return-524877-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 18:46:56 2016
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From: "dimhen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/71071] New: [7 regression] ICE --enable-checking=fold : fold check: original tree changed by fold
Date: Wed, 11 May 2016 18:46:00 -0000
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Bug ID: 71071
Summary: [7 regression] ICE --enable-checking=fold : fold
check: original tree changed by fold
Product: gcc
Version: 7.0
Status: UNCONFIRMED
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Priority: P3
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Reporter: dimhen at gmail dot com
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r236043 PASS
r236132 FAIL
/home/dimhen/src/gcc_current/configure --prefix=/usr/local/gcc_current
--enable-checking=fold --enable-languages=c,c++ --disable-multilib
/home/dimhen/build/gcc_current/./gcc/xgcc
-B/home/dimhen/build/gcc_current/./gcc/
-B/usr/local/gcc_current/x86_64-pc-linux-gnu/bin/
-B/usr/local/gcc_current/x86_64-pc-linux-gnu/lib/ -isystem
/usr/local/gcc_current/x86_64-pc-linux-gnu/include -isystem
/usr/local/gcc_current/x86_64-pc-linux-gnu/sys-include -g -O2 -O2 -g -O2
-DIN_GCC -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-format
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem
./include -fpic -mlong-double-80 -DUSE_ELF_SYMVER -g -DIN_LIBGCC2
-fbuilding-libgcc -fno-stack-protector -fpic -mlong-double-80
-DUSE_ELF_SYMVER -I. -I. -I../.././gcc -I/home/dimhen/src/gcc_current/libgcc
-I/home/dimhen/src/gcc_current/libgcc/.
-I/home/dimhen/src/gcc_current/libgcc/../gcc
-I/home/dimhen/src/gcc_current/libgcc/../include
-I/home/dimhen/src/gcc_current/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT
-DHAVE_CC_TLS -DUSE_TLS -o _gcov.o -MT _gcov.o -MD -MP -MF _gcov.dep -DL_gcov
-c /home/dimhen/src/gcc_current/libgcc/libgcov-driver.c
/home/dimhen/src/gcc_current/libgcc/libgcov-driver.c: In function
'__gcov_dump_one':
/home/dimhen/src/gcc_current/libgcc/libgcov-driver.c:855:3: internal compiler
error: fold check: original tree changed by fold
if (root->dumped)
^~
0xa3931f fold_check_failed
/home/dimhen/src/gcc_current/gcc/fold-const.c:12099
0xa3a05c fold_build2_stat_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
/home/dimhen/src/gcc_current/gcc/fold-const.c:12358
0x11e7407 generic_simplify_186
/home/dimhen/build/gcc_current/gcc/generic-match.c:6903
0x1224527 generic_simplify_NE_EXPR
/home/dimhen/build/gcc_current/gcc/generic-match.c:27430
0x1229e7a generic_simplify(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
/home/dimhen/build/gcc_current/gcc/generic-match.c:29656
0xa2e7af fold_binary_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
/home/dimhen/src/gcc_current/gcc/fold-const.c:9265
0xa39f9c fold_build2_stat_loc(unsigned int, tree_code, tree_node*, tree_node*,
tree_node*)
/home/dimhen/src/gcc_current/gcc/fold-const.c:12347
0x80aa18 c_fully_fold_internal
/home/dimhen/src/gcc_current/gcc/c/c-fold.c:305
0x80a147 c_fully_fold(tree_node*, bool, bool*)
/home/dimhen/src/gcc_current/gcc/c/c-fold.c:90
0x7de299 c_parser_condition
/home/dimhen/src/gcc_current/gcc/c/c-parser.c:5314
0x7de2f7 c_parser_paren_condition
/home/dimhen/src/gcc_current/gcc/c/c-parser.c:5331
0x7de775 c_parser_if_statement
/home/dimhen/src/gcc_current/gcc/c/c-parser.c:5493
0x7ddac5 c_parser_statement_after_labels
/home/dimhen/src/gcc_current/gcc/c/c-parser.c:5138
0x7dd543 c_parser_compound_statement_nostart
/home/dimhen/src/gcc_current/gcc/c/c-parser.c:4858
0x7dcf5a c_parser_compound_statement
/home/dimhen/src/gcc_current/gcc/c/c-parser.c:4693
0x7d7fb7 c_parser_declaration_or_fndef
/home/dimhen/src/gcc_current/gcc/c/c-parser.c:2105
0x7d6b98 c_parser_external_declaration
/home/dimhen/src/gcc_current/gcc/c/c-parser.c:1549
0x7d6740 c_parser_translation_unit
/home/dimhen/src/gcc_current/gcc/c/c-parser.c:1430
0x801c9e c_parse_file()
/home/dimhen/src/gcc_current/gcc/c/c-parser.c:17915
0x8602ec c_common_parse_file()
/home/dimhen/src/gcc_current/gcc/c-family/c-opts.c:1064
Please submit a full bug report,
>From gcc-bugs-return-524878-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 19:06:33 2016
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Subject: [Bug fortran/70855] [6/7 Regression] ICE with -fopenmp in gfc_trans_omp_workshare(): Bad statement code
Date: Wed, 11 May 2016 19:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70855
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-524880-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 19:07:51 2016
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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++/71049] [6/7 Regression] libstdc++ fails to build --with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
Date: Wed, 11 May 2016 19:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71049
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
fixed on trunk and gcc-6-branch
>From gcc-bugs-return-524879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 19:07:30 2016
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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++/71049] [6/7 Regression] libstdc++ fails to build --with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi
Date: Wed, 11 May 2016 19:07:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed May 11 19:06:45 2016
New Revision: 236137
URL: https://gcc.gnu.org/viewcvs?rev=236137&root=gcc&view=rev
Log:
libstdc++/71049 fix --disable-libstdcxx-dual-abi bootstrap
PR libstdc++/71049
* src/c++11/cow-stdexcept.cc [!_GLIBCXX_USE_DUAL_ABI]: Don't define
exception constructors with __sso_string parameters.
Modified:
branches/gcc-6-branch/libstdc++-v3/ChangeLog
branches/gcc-6-branch/libstdc++-v3/src/c++11/cow-stdexcept.cc
>From gcc-bugs-return-524881-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 19:33:34 2016
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From: "doko at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/71072] New: [6/7] gnat doesn't respect --enable-default-pie
Date: Wed, 11 May 2016 19:33:00 -0000
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Bug ID: 71072
Summary: [6/7] gnat doesn't respect --enable-default-pie
Product: gcc
Version: 6.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
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GCC 6 introduces the --enable-default-pie option, however it looks like gnat
doesn't respect this option.
Seen while running the examples/matrix test in gprbuild on x86_64-linux-gnu
(gnatgcc here is just a symlink to the gcc driver matching the gnat version):
make[1]: Entering directory '/tmp/adt-run.SU7baW/adttmp/examples/matrix'
gprconfig --batch --config Ada --config C --config Fortran -o default.cgpr
Creating configuration file: default.cgpr
gprbuild
using project file matrix.gpr
gnatgcc -c -gnat05 main.adb
gfortran -c multmat.f
gcc -c initmat.c
gprbind main.bexch
gnatbind main.ali
gnatgcc -c b__main.adb
ar cr libmatrix.a ...
ranlib libmatrix.a
gfortran main.o -o main
/usr/bin/ld: main.o: relocation R_X86_64_32 against `.rodata' can not be used
when making a shared object; recompile with -fPIC
main.o: error adding symbols: Bad value
Makefile:2: recipe for target 'all' failed
make[1]: Leaving directory '/tmp/adt-run.SU7baW/adttmp/examples/matrix'
Makefile:5: recipe for target 'all' failed
collect2: error: ld returned 1 exit status
gprbuild: link of main.adb failed
make[1]: *** [all] Error 4
>From gcc-bugs-return-524882-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 19:43:03 2016
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Subject: [Bug libstdc++/71073] New: debug-mode headers should include #pragma GCC system_header directives
Date: Wed, 11 May 2016 19:43:00 -0000
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Bug ID: 71073
Summary: debug-mode headers should include #pragma GCC
system_header directives
Product: gcc
Version: unknown
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This change would help analysis tools cope with the code in the debug-mode
headers, usually by ignoring it.
>From gcc-bugs-return-524883-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 20:11:39 2016
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Subject: [Bug ada/71072] GNAT doesn't respect --enable-default-pie
Date: Wed, 11 May 2016 20:11:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2016-05-11
CC| |ebotcazou at gcc dot gnu.org
Summary|[6/7] gnat doesn't respect |GNAT doesn't respect
|--enable-default-pie |--enable-default-pie
Ever confirmed|0 |1
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
There is not enough information. Please provide a testcase and a GCC command
line (no, a GPRbuild invocation doesn't qualify).
>From gcc-bugs-return-524884-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 20:24:23 2016
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Subject: [Bug c/43651] add warning for duplicate qualifier
Date: Wed, 11 May 2016 20:24:00 -0000
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--- Comment #8 from Mikhail Maltsev <miyuki at gcc dot gnu.org> ---
Author: miyuki
Date: Wed May 11 20:23:37 2016
New Revision: 236142
URL: https://gcc.gnu.org/viewcvs?rev=236142&root=gcc&view=rev
Log:
PR43651: add warning for duplicate qualifier
gcc/c/
PR c/43651
* c-decl.c (declspecs_add_qual): Warn when -Wduplicate-decl-specifier
is enabled.
* c-errors.c (pedwarn_c90): Return true if warned.
* c-tree.h (pedwarn_c90): Change return type to bool.
(enum c_declspec_word): Add new enumerator cdw_atomic.
gcc/
PR c/43651
* doc/invoke.texi (Wduplicate-decl-specifier): Document new option.
gcc/testsuite/
PR c/43651
* gcc.dg/Wduplicate-decl-specifier-c11.c: New test.
* gcc.dg/Wduplicate-decl-specifier.c: Likewise.
gcc/c-family/
PR c/43651
* c.opt (Wduplicate-decl-specifier): New option.
Added:
trunk/gcc/testsuite/gcc.dg/Wduplicate-decl-specifier-c11.c
trunk/gcc/testsuite/gcc.dg/Wduplicate-decl-specifier.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c.opt
trunk/gcc/c/ChangeLog
trunk/gcc/c/c-decl.c
trunk/gcc/c/c-errors.c
trunk/gcc/c/c-tree.h
trunk/gcc/doc/invoke.texi
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-524885-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 20:29:03 2016
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Subject: [Bug c/43651] add warning for duplicate qualifier
Date: Wed, 11 May 2016 20:29:00 -0000
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Mikhail Maltsev <miyuki at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from Mikhail Maltsev <miyuki at gcc dot gnu.org> ---
Fixed for GCC 7.
>From gcc-bugs-return-524886-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 20:49:50 2016
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Subject: [Bug rtl-optimization/70825] x86_64: __atomic_compare_exchange_n() accesses stack unnecessarily
Date: Wed, 11 May 2016 20:49:00 -0000
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86_64, aarch64 |x86_64, aarch64, powerpc64*
--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Also on powerpc64:
.file "gorp.c"
.abiversion 2
.section ".text"
.align 2
.p2align 4,,15
.globl test_atomic_cmpxchg
.type test_atomic_cmpxchg, @function
test_atomic_cmpxchg:
li 9,23
stw 9,-16(1) <-- unnecessary
sync
.L2:
lwarx 9,0,3
cmpwi 0,9,23
bne 0,.L3
li 9,42
stwcx. 9,0,3
bne 0,.L2
isync
.L3:
blr
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Subject: [Bug c/71074] combine.c in simplify_comparison sanitizer detects left shift of negative value
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Vittorio Zecca <zeccav at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |minor
>From gcc-bugs-return-524887-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 21:15:40 2016
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Subject: [Bug c/71074] New: combine.c in simplify_comparison sanitizer detects left shift of negative value
Date: Wed, 11 May 2016 21:15:00 -0000
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Bug ID: 71074
Summary: combine.c in simplify_comparison sanitizer detects
left shift of negative value
Product: gcc
Version: 7.0
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/* gcc -O2 sanitizer undefined runtime error */
/* In gcc trunk 7.0 */
/* ../../gcc7/gcc/combine.c:12340:18: runtime error: left shift of negative
value -13 */
/* combine.c:12340 is "const_op <<= INTVAL (XEXP (op0, 1));" */
/* From PR target/49238 */
int bar (void);
void
foo (unsigned long long a, int b)
{
int i;
for (a = -12; a >= 10; a = bar ())
break;
if (i == bar () || bar () >= a)
bar ();
}
>From gcc-bugs-return-524889-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 21:24:59 2016
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Subject: [Bug testsuite/71021] [libatomic testsuite] Test program compilation fail (missing -pthread flag)
Date: Wed, 11 May 2016 21:24:00 -0000
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--- Comment #2 from Romain Geissler <romain.geissler at amadeus dot com> ---
The very same thing happens with gcc 6.1.1.
>From gcc-bugs-return-524890-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 21:26:01 2016
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From: "romain.geissler at amadeus dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/71021] [libatomic testsuite] Test program compilation fail (missing -pthread flag)
Date: Wed, 11 May 2016 21:26:00 -0000
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--- Comment #3 from Romain Geissler <romain.geissler at amadeus dot com> ---
Please note that this is the only target lib that fails for me. Others (like
libgomp) are fine.
>From gcc-bugs-return-524891-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 22:03:36 2016
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From: "arthur.j.odwyer at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/71075] New: Broken diagnostic: 'integer_cst' not supported by 'dump_decl'
Date: Wed, 11 May 2016 22:03:00 -0000
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Bug ID: 71075
Summary: Broken diagnostic: 'integer_cst' not supported by
'dump_decl'
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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I'm not sure how this isn't a duplicate of
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51229 , but that bug has been
marked RESOLVED FIXED since 2011, and this bug still reproduces in GCC 7.0.
template<typename T, int I> struct A {};
template<typename T> void foo(A<T,1>) {}
int main() {
foo(A<int,2>());
}
====
prog.cc: In function 'int main()':
prog.cc:4:19: error: no matching function for call to 'foo(A<int, 2>)'
foo(A<int,2>());
^
prog.cc:2:27: note: candidate: template<class T> void foo(A<T, 1>)
template<typename T> void foo(A<T,1>) {}
^~~
prog.cc:2:27: note: template argument deduction/substitution failed:
prog.cc:4:19: note: template argument '2' does not match '#'integer_cst' not
supported by dump_decl#<declaration error>'
foo(A<int,2>());
^
====
Notice the last diagnostic line above: "template argument '2' does not match
'#'integer_cst' not supported by dump_decl#<declaration error>'".
I think GCC is correct in rejecting the input program; it just doesn't
understand how to print the resulting diagnostic.
>From gcc-bugs-return-524892-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed May 11 23:14:48 2016
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From: "manisandro at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/71076] New: Internal compiler error
Date: Wed, 11 May 2016 23:14:00 -0000
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Bug ID: 71076
Summary: Internal compiler error
Product: gcc
Version: 6.1.1
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Following is with gcc version 6.1.1 20160510 (Red Hat 6.1.1-2) (GCC)
Following code snippet compiled as
g++ -c -O foo.cpp -o foo.o
produces an ICE:
foo.cpp:
--------
extern "C" {
extern float sqrtf (float);
}
template <class T> struct Foo
{
Foo();
T a() const;
Foo<T> b() const;
};
template <class T>
Foo<T> Foo<T>::b() const
{
T x = a();
T y = x < 0 ? 0 : ::sqrtf (x);
return y == T(0) ? Foo() : Foo();
}
struct Bar
{
~Bar();
};
void foo()
{
Bar bar;
Foo<float> dir = Foo<float>().b();
}
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From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/71076] [6/7 Regression] error: missing PHI def
Date: Thu, 12 May 2016 00:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71076
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-12
CC| |trippels at gcc dot gnu.org
Component|c++ |middle-end
Summary|Internal compiler error |[6/7 Regression] error:
| |missing PHI def
Ever confirmed|0 |1
--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
x.ii: In function ‘void foo()’:
x.ii:22:6: error: missing PHI def
void foo() {
^~~
iftmp.0_12 = PHI <0.0(4), _11(11), (5)>
x.ii:22:6: internal compiler error: verify_gimple failed
0xd8a706 verify_gimple_in_cfg(function*, bool)
../../gcc/gcc/tree-cfg.c:5166
0xc7ead3 execute_function_todo
../../gcc/gcc/passes.c:1964
0xc7f48b execute_todo
../../gcc/gcc/passes.c:2016
>From gcc-bugs-return-524894-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 02:24:24 2016
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From: "john.ettedgui at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
Date: Thu, 12 May 2016 02:24:00 -0000
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--- Comment #10 from John Ettedgui <john.ettedgui at gmail dot com> ---
I tried to rebuild my gcc with Kal's patch but it fails with this error:
"make[6]: *** No rule to make target '../src/c++11/libc++11convenience.la',
needed by 'libstdc++.la'. Stop."
I don't understand how it relates to the patch, and I have no issue rebuilding
without the patch.
Should I use the patch against 6.2 trunk and not 6.1.1?
Thanks
>From gcc-bugs-return-524895-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 05:17:03 2016
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From: "saguryev.gnu at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/71077] New: gcc -lto raises ICE
Date: Thu, 12 May 2016 05:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71077
Bug ID: 71077
Summary: gcc -lto raises ICE
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: lto
Assignee: unassigned at gcc dot gnu.org
Reporter: saguryev.gnu at gmail dot com
Target Milestone: ---
gcc raises ICE as follows starting from rev. 235653 :
[# 00000001] {2186}$> ./gcc -O3 -flto -march=core-avx2 O768_r.c
[ warnings snipped ]
O768_r.c:3:1: warning: return type defaults to 'int' [-Wimplicit-int]
main() {
^~~~
O768_r.c: In function 'main':
O768_r.c:3:1: internal compiler error: in find_taken_edge_cond_expr, at
tree-cfg.c:2235
main() {
^
0xa9fe03 find_taken_edge_cond_expr
../../..//src/235653/gcc/tree-cfg.c:2235
0xa9fe03 find_taken_edge(basic_block_def*, tree_node*)
../../..//src/235653/gcc/tree-cfg.c:2182
0xc5880c thread_through_normal_block
../../..//src/235653/gcc/tree-ssa-threadedge.c:1077
0xc5a124 thread_across_edge(gcond*, edge_def*, bool, const_and_copies*,
avail_exprs_stack*, tree_node* (*)(gimple*, gimple*, avail_exprs_stack*))
../../..//src/235653/gcc/tree-ssa-threadedge.c:1274
0xce641f identify_jump_threads
../../..//src/235653/gcc/tree-vrp.c:10184
0xce641f vrp_finalize
../../..//src/235653/gcc/tree-vrp.c:10256
0xce641f execute_vrp
../../..//src/235653/gcc/tree-vrp.c:10345
0xce641f execute
../../..//src/235653/gcc/tree-vrp.c:10430
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
lto-wrapper: fatal error: ./gcc returned 1 exit status
compilation terminated.
/usr/bin/ld: lto-wrapper failed
collect2: error: ld returned 1 exit status
[# 00000001] {2187}$> cat O768_r.c
*a;
b, c, d;
main() {
for (;; b++) {
c = 0;
for (; c < 32; c++)
if (b & 1 << c)
a[b + c] = d;
}
}
>From gcc-bugs-return-524896-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 05:55:40 2016
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Subject: [Bug tree-optimization/71077] gcc -lto raises ICE
Date: Thu, 12 May 2016 05:55:00 -0000
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--- Comment #1 from Sergey <saguryev.gnu at gmail dot com> ---
Upd: with the reduced testcase the problem hid out after May 3; here is a
bigger testcase which reveals it reliably :
output_inline_function() { rest_of_compilation(); }
*a;
b, c, d, e;
sched_analyze() {
for (; b; b++) {
c = 0;
for (; c < 32; c++)
if (b & 1 << c)
a[b + c] = d;
}
}
schedule_insns() { e = sched_analyze; }
main() { schedule_insns(); }
>From gcc-bugs-return-524897-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 07:00:28 2016
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Subject: [Bug tree-optimization/71078] New: x/abs(x) -> sign(1.0,x)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71078
Bug ID: 71078
Summary: x/abs(x) -> sign(1.0,x)
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
just noticed in some legacy code the equivalent of this construct:
REAL FUNCTION mysign(x)
REAL :: x
mysign=x/abs(x)
END FUNCTION
which I would expect to be converted to some form of copysign function with
'-O3 -ffast-math', but it is not.
>From gcc-bugs-return-524898-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 07:12:59 2016
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Subject: [Bug c++/71010] error: 'begin' was not declared in this scope
Date: Thu, 12 May 2016 07:12:00 -0000
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Ubikovich <theubik at mail dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|INVALID |FIXED
--- Comment #3 from Ubikovich <theubik at mail dot ru> ---
But since C++14 cbegin invoke std::begin:
// http://en.cppreference.com/w/cpp/iterator/begin
template< class C >
constexpr auto cbegin( const C& c ) -> decltype(std::begin(c));
(3) (since C++14)
Then in what namespace should be user-defined begin/end?
>From gcc-bugs-return-524899-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 07:19:42 2016
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Subject: [Bug tree-optimization/70986] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in combine_blocks, at tree-if-conv.c:2219
Date: Thu, 12 May 2016 07:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-524900-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 07:19:44 2016
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Subject: [Bug tree-optimization/70986] [7 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in combine_blocks, at tree-if-conv.c:2219
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--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu May 12 07:18:58 2016
New Revision: 236158
URL: https://gcc.gnu.org/viewcvs?rev=236158&root=gcc&view=rev
Log:
2016-05-12 Richard Biener <rguenther@suse.de>
PR tree-optimization/70986
* cfganal.c: Include cfgloop.h.
(dfs_find_deadend): Prefer to take edges exiting loops.
* gcc.dg/torture/pr70986-1.c: New testcase.
* gcc.dg/torture/pr70986-2.c: Likewise.
* gcc.dg/torture/pr70986-3.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr70986-1.c
trunk/gcc/testsuite/gcc.dg/torture/pr70986-2.c
trunk/gcc/testsuite/gcc.dg/torture/pr70986-3.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfganal.c
trunk/gcc/testsuite/ChangeLog
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/71079] New: ICE on valid code at -O1 and above on x86_64-linux-gnu: verify_gimple failed
Date: Thu, 12 May 2016 07:25:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71079
Bug ID: 71079
Summary: ICE on valid code at -O1 and above on
x86_64-linux-gnu: verify_gimple failed
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
The following code causes an ICE when compiled with the current gcc trunk at
-O1 and above on x86_64-linux-gnu in both 32-bit and 64-bit modes.
$ 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/7.0.0/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 7.0.0 20160511 (experimental) [trunk revision 236125] (GCC)
$
$ gcc-trunk -O0 -c small.c
$
$ gcc-trunk -O1 -c small.c
small.c: In function ‘fn1’:
small.c:10:1: error: type mismatch in binary expression
}
^
unsigned int
int
unsigned int
_12 = a.0_1 ^ c.4_4;
small.c:10:1: internal compiler error: verify_gimple failed
0xbfe28f verify_gimple_in_cfg(function*, bool)
../../gcc-source-trunk/gcc/tree-cfg.c:5166
0xaecaa2 execute_function_todo
../../gcc-source-trunk/gcc/passes.c:1964
0xaed49b execute_todo
../../gcc-source-trunk/gcc/passes.c:2016
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.
$
------------------------------
int a;
unsigned b, c;
void
fn1 ()
{
int d = 1, e, f;
e = ~a ^ ~1;
f = (b || d) ^ c ^ e;
}
>From gcc-bugs-return-524902-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 07:30:19 2016
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Subject: [Bug tree-optimization/71060] Compiler reports "loop vectorized" but actually it was not
Date: Thu, 12 May 2016 07:30:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu May 12 07:29:33 2016
New Revision: 236159
URL: https://gcc.gnu.org/viewcvs?rev=236159&root=gcc&view=rev
Log:
2016-05-12 Richard Biener <rguenther@suse.de>
PR tree-optimization/71060
* tree-data-ref.c (initialize_data_dependence_relation): Do not
require exact match of DR_BASE_OBJECT but only matching address and
type.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-data-ref.c
>From gcc-bugs-return-524903-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 07:30:37 2016
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Subject: [Bug tree-optimization/71060] Compiler reports "loop vectorized" but actually it was not
Date: Thu, 12 May 2016 07:30:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|diagnostic |
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Behavior of the testcase is fixed - I'm leaving this open for the issue that
if-conversion doesn't transfer restrict info to masked loads/stores.
>From gcc-bugs-return-524904-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 07:34:17 2016
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Subject: [Bug middle-end/71078] x/abs(x) -> sign(1.0,x)
Date: Thu, 12 May 2016 07:34:00 -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| |2016-05-12
CC| |rguenth at gcc dot gnu.org
Component|tree-optimization |middle-end
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Similar to
/* Optimize A / A to 1.0 if we don't care about
NaNs or Infinities. */
(simplify
(rdiv @0 @0)
(if (FLOAT_TYPE_P (type)
&& ! HONOR_NANS (type)
&& ! HONOR_INFINITIES (type))
{ build_one_cst (type); }))
/* Optimize -A / A to -1.0 if we don't care about
NaNs or Infinities. */
(simplify
(rdiv:C @0 (negate @0))
(if (FLOAT_TYPE_P (type)
&& ! HONOR_NANS (type)
&& ! HONOR_INFINITIES (type))
{ build_minus_one_cst (type); }))
>From gcc-bugs-return-524905-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 07:50:55 2016
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Subject: [Bug tree-optimization/71077] [7 Regression] gcc -lto raises ICE
Date: Thu, 12 May 2016 07:50:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-12
CC| |ppalka at gcc dot gnu.org
Target Milestone|--- |7.0
Summary|gcc -lto raises ICE |[7 Regression] gcc -lto
| |raises ICE
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
#1 0x0000000000d9c921 in find_taken_edge_cond_expr (
bb=<basic_block 0x7ffff688f9c0 (38)>, val=<vector_cst 0x7ffff66bc320>)
at /space/rguenther/src/svn/trunk/gcc/tree-cfg.c:2230
2230 gcc_assert (TREE_CODE (val) == INTEGER_CST);
(gdb) l
2225 {
2226 edge true_edge, false_edge;
2227
2228 extract_true_false_edges_from_block (bb, &true_edge, &false_edge);
2229
2230 gcc_assert (TREE_CODE (val) == INTEGER_CST);
2231 return (integer_zerop (val) ? false_edge : true_edge);
2232 }
2233
2234 /* Given an INTEGER_CST VAL and the entry block BB to a SWITCH_EXPR
(gdb) p val
$1 = <vector_cst 0x7ffff66bc320>
simplify_control_stmt_condition doesn't handle vector equality tests in
GIMPLE_CONDs nor do I think it handles the combining step correctly
(failing to properly use constant_boolean_node instead of zero/one).
>From gcc-bugs-return-524906-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 07:55:34 2016
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Subject: [Bug middle-end/71076] [6/7 Regression] error: missing PHI def
Date: Thu, 12 May 2016 07:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Known to work| |5.3.0
Target Milestone|--- |6.2
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Another call cdce issue. Looks like edges are hosed as well (and this may be
the reason for the bogus PHI):
;; basic block 11, loop depth 0
;; pred: 5
sqrtf (_10);
;; succ: 6
;; 10
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Subject: [Bug bootstrap/71071] [7 regression] ICE --enable-checking=fold : fold check: original tree changed by fold
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----------------------------------------------------------------------------
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Subject: [Bug middle-end/71062] [7 regression] r235622 and restrict pointers
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2016-05-12
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Target Milestone|--- |7.0
Ever confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
>From gcc-bugs-return-524909-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 08:23:56 2016
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
Date: Thu, 12 May 2016 08:23:00 -0000
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--- Comment #11 from Kai Tietz <ktietz at gcc dot gnu.org> ---
this doesn't seem to be related with my patch at all. It looks more like you
are trying to re-use an old build tree. Patch is made against trunk.
Nevertheless should work for 6.x branch, too.
I build in general just a cross-compiler, and this works with and without this
patch flawless.
>From gcc-bugs-return-524910-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 08:28:20 2016
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
Date: Thu, 12 May 2016 08:28:00 -0000
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--- Comment #12 from John Ettedgui <john.ettedgui at gmail dot com> ---
Well, I'll keep trying then.
Thank you!
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Subject: [Bug target/71019] AVX512BW instructions emitted even without AVX512BW
Date: Thu, 12 May 2016 08:34:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu May 12 08:33:14 2016
New Revision: 236163
URL: https://gcc.gnu.org/viewcvs?rev=236163&root=gcc&view=rev
Log:
PR target/71019
* config/i386/sse.md (<sse2_avx2>_packssdw<mask_name>,
<sse4_1_avx2>_packusdw<mask_name>): Make sure EVEX encoded insn
is not emitted unless TARGET_AVX512BW.
(<sse2_avx2>_packuswb<mask_name>, <sse2_avx2>_packsswb<mask_name>):
Likewise. For TARGET_AVX512BW, use "=v" constraint instead of "=x"
for the result operand.
* gcc.target/i386/avx512vl-pack-1.c: New test.
* gcc.target/i386/avx512vl-pack-2.c: New test.
* gcc.target/i386/avx512bw-pack-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/avx512bw-pack-2.c
trunk/gcc/testsuite/gcc.target/i386/avx512vl-pack-1.c
trunk/gcc/testsuite/gcc.target/i386/avx512vl-pack-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/sse.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/71074] combine.c in simplify_comparison sanitizer detects left shift of negative value
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ktkachov at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-12
CC| |ktkachov at gcc dot gnu.org
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--- Comment #1 from ktkachov at gcc dot gnu.org ---
Confirmed on trunk with an assert
>From gcc-bugs-return-524913-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 08:59:18 2016
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
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Kai Tietz <ktietz at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #38469|0 |1
is obsolete| |
Attachment #38470|0 |1
is obsolete| |
--- Comment #13 from Kai Tietz <ktietz at gcc dot gnu.org> ---
Created attachment 38472
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38472&action=edit
updated patch
I just noticed I missed to provide my current change. It might be related to
the build failure you noticed.
In general it isn't clear, if we should prevent deeper recursions of
DECL_INITIAL. In some cases "var = var;" seems to be valid, so we need to
handle that.
>From gcc-bugs-return-524915-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 09:36:51 2016
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Subject: [Bug c++/70869] [6/7 Regression] internal compiler error: Segmentation fault on array of pointer to function members
Date: Thu, 12 May 2016 09:36:00 -0000
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--- Comment #14 from John Ettedgui <john.ettedgui at gmail dot com> ---
It built fine with your latest patch.
And it also fixed the segfault I had when I created my bug.
Thank you!
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/71080] New: Segfault in ix86_in_large_data_p with -fpic -mcmodel={medium, large}
Date: Thu, 12 May 2016 09:36:00 -0000
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Bug ID: 71080
Summary: Segfault in ix86_in_large_data_p with -fpic
-mcmodel={medium, large}
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
CC: ro at gcc dot gnu.org
Target Milestone: ---
Target: x86_64
Recent commit introduced massive testsuite failures in the x86 testsuite with
-fpic -mcmodel=medium or -mcmodel=large, e.g.:
FAIL: gcc.dg/tm/20100519.c (internal compiler error)
FAIL: gcc.dg/tm/20100519.c (internal compiler error)
FAIL: gcc.dg/tm/20100519.c (test for excess errors)
FAIL: gcc.dg/tm/20100519.c (test for excess errors)
gdb --args ./cc1 -fgnu-tm -O -fpic -mcmodel=medium -quiet 20100519.c
Program received signal SIGSEGV, Segmentation fault.
0x0000000001177f70 in ix86_in_large_data_p (exp=0x0) at
../../git/gcc/gcc/config/i386/i386.c:6827
6827 if (TREE_CODE (exp) == FUNCTION_DECL)
(gdb) p exp
$1 = (tree) 0x0
(gdb) bt
#0 0x0000000001177f70 in ix86_in_large_data_p (exp=0x0) at
../../git/gcc/gcc/config/i386/i386.c:6827
#1 0x000000000117d42f in x86_64_elf_section_type_flags (decl=0x0,
name=0x1aaeec8 ".tm_clone_table", reloc=3)
at ../../git/gcc/gcc/config/i386/i386.c:6935
#2 0x0000000001136750 in get_named_section (decl=0x0, name=0x1aaeec8
".tm_clone_table", reloc=3) at ../../git/gcc/gcc/varasm.c:422
#3 0x00000000011369b4 in default_clone_table_section () at
../../git/gcc/gcc/varasm.c:5888
#4 0x00000000011385dc in dump_tm_clone_pairs (tm_alias_pairs=...) at
../../git/gcc/gcc/varasm.c:5871
#5 0x0000000001138969 in finish_tm_clone_pairs () at
../../git/gcc/gcc/varasm.c:5930
#6 0x0000000000daa88b in compile_file () at ../../git/gcc/gcc/toplev.c:524
#7 0x0000000000dac6c1 in do_compile () at ../../git/gcc/gcc/toplev.c:1987
#8 0x0000000000dac828 in toplev::main (this=0x7fffffffd450, argc=6,
argv=0x7fffffffd558) at ../../git/gcc/gcc/toplev.c:2095
#9 0x00000000018f0d6b in main (argc=6, argv=0x7fffffffd558) at
../../git/gcc/gcc/main.c:39
Regression tracker [1] points to r235445 vs r235428, where:
10:10 r235435 - in /trunk/gcc: ChangeLog config/i386/... ro
10:06 r235434 - in /trunk/gcc: ChangeLog config/i386/... ro
[1] https://gcc.gnu.org/ml/gcc-regression/2016-04/msg04692.html
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Subject: [Bug libstdc++/71081] New: experimental/memory_resource/1.cc run for targets without atomics
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71081
Bug ID: 71081
Summary: experimental/memory_resource/1.cc run for targets
without atomics
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: thopre01 at gcc dot gnu.org
CC: redi at gcc dot gnu.org
Target Milestone: ---
Target: arm-none-eabi
Hi,
experimental/memory_resource/1.cc test in libstdc++ is run for target without
atomic support (such as ARMv6-M devices) and thus fail with the following
error:
ccAS6AZQ.o: In function
`std::__atomic_base<std::experimental::fundamentals_v2::pmr::memory_resource*>::exchange(std::experimental::fundamentals_v2::pmr::memory_resource*,
std::memory_order)':^M
libstdc++-v3/include/bits/atomic_base.h:730: undefined reference to
`__atomic_exchange_4'^M
collect2: error: ld returned 1 exit status^M
compiler exited with status 1
output is:
ccAS6AZQ.o: In function
`std::__atomic_base<std::experimental::fundamentals_v2::pmr::memory_resource*>::exchange(std::experimental::fundamentals_v2::pmr::memory_resource*,
std::memory_order)':^M
libstdc++-v3/include/bits/atomic_base.h:730: undefined reference to
`__atomic_exchange_4'^M
collect2: error: ld returned 1 exit status^M
FAIL: experimental/memory_resource/1.cc (test for excess errors)
Excess errors:
libstdc++-v3/include/bits/atomic_base.h:730: undefined reference to
`__atomic_exchange_4'
collect2: error: ld returned 1 exit status
UNRESOLVED: experimental/memory_resource/1.cc compilation failed to produce
executable
The error seems to come from the experimental/memory_resource file included in
that test.
I believe the test should have an additional dg-require-atomic-builtins dejagnu
directive.
>From gcc-bugs-return-524917-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu May 12 09:46:55 2016
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Date: Thu, 12 May 2016 09:46:00 -0000
From: RaghuShankar <mcsraghu@gmail.com>
To: gcc-bugs@gcc.gnu.org
Message-ID: <1463046398779-1262876.post@n5.nabble.com>
Subject: GCC 6.1.0 ARM cross compiling xgcc error not producing output file from .S files
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Hi,
I am trying to cross compile the latest gcc 6.1.0 to arm architecture.
At the end of libgcc compilation i am getting the error
*"root/embeddedlinux/gcc/armcrosstool/arm-linux-gnueabi/bin/ar:
_thumb1_case_sqi.o: No such file or directory"*
*But when i cross checked libgcc compilation it has compiled the
"_thumb1_case_sqi.dep" file and tried to create .o file but it is not? Hence
the error.*
/root/embeddedlinux/gcc/gcc-6.1.0/build/./gcc/xgcc
-B/root/embeddedlinux/gcc/gcc-6.1.0/build/./gcc/
-B/root/embeddedlinux/gcc/armcrosstool/arm-linux-gnueabi/bin/
-B/root/embeddedlinux/gcc/armcrosstool/arm-linux-gnueabi/lib/ -isystem
/root/embeddedlinux/gcc/armcrosstool/arm-linux-gnueabi/include -isystem
/root/embeddedlinux/gcc/armcrosstool/arm-linux-gnueabi/sys-include -g -O2
-O2 -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wno-narrowing
-Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -isystem ./include -fPIC -fno-inline -g
-DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -Dinhibit_libc -fPIC
-fno-inline -DUSE_EMUTLS -o _thumb1_case_sqi.o -MT _thumb1_case_sqi.o -MD
-MP -MF _thumb1_case_sqi.dep -DL_thumb1_case_sqi -xassembler-with-cpp -c
../../../libgcc/config/arm/lib1funcs.S -include _thumb1_case_sqi.vis
For further error information please check the attached error file.
gcc-6.txt <http://gcc.1065356.n5.nabble.com/file/n1262876/gcc-6.txt>
If any body having solution please let us know.
Thanking you
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