* [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
[not found] <bug-80556-4@http.gcc.gnu.org/bugzilla/>
@ 2017-05-02 6:31 ` gingold at adacore dot com
2021-11-19 19:58 ` cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 5+ messages in thread
From: gingold at adacore dot com @ 2017-05-02 6:31 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
--- Comment #6 from Tristan Gingold <gingold at adacore dot com> ---
On 29/04/2017 21:11, ebotcazou at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
>
> Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|WAITING |NEW
> CC| |gingold at gcc dot gnu.org
>
> --- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
>> a bunch of similar errors
>> ...
>> * thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
>> * frame #0: 0x00007fffa7e8fd42 libsystem_kernel.dylib`__pthread_kill + 10
>> frame #1: 0x00007fffa7f7d5bf libsystem_pthread.dylib`pthread_kill + 90
>> frame #2: 0x00007fffa7df5420 libsystem_c.dylib`abort + 129
>> frame #3: 0x0000000100ff88c1
>> gnat1`uw_init_context_1(context=<unavailable>, outer_cfa=<unavailable>,
>> outer_ra=<unavailable>) at unwind-dw2.c:1579
>> frame #4: 0x0000000100ff8f2e
>> gnat1`_Unwind_RaiseException(exc=0x0000000144a022a0) at unwind.inc:88
>> frame #5: 0x000000010006663f
>> gnat1`ada__exceptions__exception_propagation__propagate_gcc_exceptionXn(gcc_e
>> xception=0x0000000144a022a0) at a-exexpr.adb:322
>> frame #6: 0x0000000100066683
>> gnat1`ada__exceptions__exception_propagation__propagate_exceptionXn(excep=<un
>> available>) at a-exexpr.adb:354
>> frame #7: 0x0000000100066af9
>> gnat1`ada__exceptions__complete_and_propagate_occurrence(x=<unavailable>) at
>> a-except.adb:937
>> frame #8: 0x0000000100066b2e
>> gnat1`__gnat_raise_exception(e=<unavailable>, message=<unavailable>) at
>> a-except.adb:978
>> frame #9: 0x00000001001fbf9a gnat1`rtsfind__load_fail(s=const
>> string___XUP @ 0x00007fe1c0cf6f50, u_id=<unavailable>, id=<unavailable>) at
>> rtsfind.adb:851
>
> OK, thanks, there is a problem in exception propagation on the Darwin host.
> I'm not exactly a specialist here, so CCing Tristan.
It looks like gnat1 was compiled with libgcc, which is not able to
handle unwinding on Darwin.
I suppose it must be linked without -static-libgcc
>
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Tue, 02 May 2017 06:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> It looks like gnat1 was compiled with libgcc, which is not able to
> handle unwinding on Darwin.
> I suppose it must be linked without -static-libgcc
Is there a specific change intended to do it and which doesn't work here?
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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/41953] missing uninitialized warning (SRA,VOP)
Date: Tue, 02 May 2017 07:27:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Sth like the following. Note that fentry_reached just means that there
exists a path from function entry to the use that has the use not
initialized -- it doesn't mean this path can be ever executed (there's
no predicate analysis done to disprove the obvious cases). With restricting
it to uses that are not predicated the amount of false positives should be
minimal (well, hopefully - eventually we need to restrict this to -O1+
for this reason). Or finally re-write uninit predicate analysis.
Index: gcc/tree-ssa-uninit.c
===================================================================
--- gcc/tree-ssa-uninit.c (revision 247368)
+++ gcc/tree-ssa-uninit.c (working copy)
@@ -319,7 +319,8 @@ warn_uninitialized_vars (bool warn_possi
continue;
}
oracle_cnt += res;
- if (data.found_may_defs)
+ if (data.found_may_defs
+ && ! (fentry_reached && always_executed))
continue;
/* Do not warn if it can be initialized outside this function.
If we did not reach function entry then we found killing
@@ -337,7 +338,7 @@ warn_uninitialized_vars (bool warn_possi
location_t location
= linemap_resolve_location (line_table, gimple_location (stmt),
LRK_SPELLING_LOCATION, NULL);
- if (always_executed)
+ if (always_executed && ! data.found_may_defs)
{
if (warning_at (location, OPT_Wuninitialized,
"%qE is used uninitialized in this function",
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Subject: [Bug ada/80590] New: [ada] non-bootstrap build failure in ada -- Error reporting routines re-entered
Date: Tue, 02 May 2017 08:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80590
Bug ID: 80590
Summary: [ada] non-bootstrap build failure in ada -- Error
reporting routines re-entered
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
...
nobootstrap/build/./gcc/xgcc -Bnobootstrap/build/./gcc/
-Bnobootstrap/install/x86_64-pc-linux-gnu/bin/
-Bnobootstrap/install/x86_64-pc-linux-gnu/lib/ -isystem
nobootstrap/install/x86_64-pc-linux-gnu/include -isystem
nobootstrap/install/x86_64-pc-linux-gnu/sys-include -c -g -O2 -fpic -W
-Wall -gnatpg -nostdinc g-exptty.adb -o g-exptty.o
in __gnat_eh_personality, at ada/raise.c:87in __gnat_eh_personality, at
ada/raise.c:87Internal compiler error: Error reporting routines re-entered.
0x87f06d __gnat_eh_personality
src/gcc/ada/raise.c:87
0x7f6d04109a42 _Unwind_RaiseException
/scratch/gcc/w/gcc-4.7.3/linux/gcc-2012.09-90/libgcc/unwind.inc:113
0x8802ce __gnat_Unwind_RaiseException
src/gcc/ada/raise-gcc.c:1426
0x94e909 ada__exceptions__exception_propagation__propagate_gcc_exceptionXn
src/gcc/ada/a-exexpr.adb:322
0x94e940 ada__exceptions__exception_propagation__propagate_exceptionXn
src/gcc/ada/a-exexpr.adb:354
0x94e951 ada__exceptions__raise_from_signal_handler
src/gcc/ada/a-except.adb:1087
0x87eec7 __gnat_error_handler
src/gcc/ada/init.c:568
0x2736d78 libiberty_vprintf_buffer_size
src/libiberty/vprintf-support.c:105
0x2736aca xvasprintf
src/libiberty/xvasprintf.c:57
0x2736712 xasprintf
src/libiberty/xasprintf.c:47
0x8b6b5c internal_error_function
src/gcc/ada/gcc-interface/misc.c:340
0x26a5408 diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
src/gcc/diagnostic.c:930
0x26a5bbc diagnostic_impl
src/gcc/diagnostic.c:1084
0x26a70d6 internal_error(char const*, ...)
src/gcc/diagnostic.c:1395
0x26a735a fancy_abort(char const*, int, char const*)
src/gcc/diagnostic.c:1461
0x87f06d __gnat_eh_personality
src/gcc/ada/raise.c:87
0x7f6d04109a42 _Unwind_RaiseException
/scratch/gcc/w/gcc-4.7.3/linux/gcc-2012.09-90/libgcc/unwind.inc:113
0x8802ce __gnat_Unwind_RaiseException
src/gcc/ada/raise-gcc.c:1426
0x94e909 ada__exceptions__exception_propagation__propagate_gcc_exceptionXn
src/gcc/ada/a-exexpr.adb:322
0x94e940 ada__exceptions__exception_propagation__propagate_exceptionXn
src/gcc/ada/a-exexpr.adb:354
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
...
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Subject: [Bug ada/80590] [ada] non-bootstrap build failure in ada -- Error reporting routines re-entered
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--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 41294
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41294&action=edit
g-exptty.adb
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g-exptty.ads
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Subject: [Bug tree-optimization/80558] VRP not handling x & -2 well
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-02
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
bitop handling for range propagation is quite poor -- we've added some
special-cases but yes, a few more wouldn't hurt. We generally miss a
bit-lattice somewhere on-the-side...
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Subject: [Bug ada/80590] [ada] non-bootstrap build failure in ada -- Error reporting routines re-entered
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--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
$ nobootstrap/build/./gcc/xgcc -v
Using built-in specs.
COLLECT_GCC=nobootstrap/build/./gcc/xgcc
Target: x86_64-pc-linux-gnu
Configured with: src/configure --prefix=nobootstrap/install --with-gmp=infra
--with-mpfr=infra --with-mpc=infra --with-isl=infra --with-cloog=infra
--with-ppl=infra --disable-bootstrap --enable-checking=yes,rtl
--enable-languages=c,c++,fortran,go,lto,objc,obj-c++,ada
Thread model: posix
gcc version 8.0.0 20170501 (experimental) (GCC)
>From gcc-bugs-return-562214-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 08:20:45 2017
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Subject: [Bug ada/80590] [ada] non-bootstrap build failure in ada -- Error reporting routines re-entered
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--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
r247436
>From gcc-bugs-return-562215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 08:27:39 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/80561] Missed optimization: std::array data is aligned if array is aligned
Date: Tue, 02 May 2017 08:27:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-05-02
Blocks| |53947
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |7.1.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. It's odd, the alignment information seems to be present but the
vectorizer somehow ignores it. I'll have a look.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
>From gcc-bugs-return-562216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 08:29:14 2017
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Subject: [Bug bootstrap/80565] [8 Regression] ICE at -O2 and -O3 in 32-bit mode (not 64-bit) on x86_64-linux-gnu (in edge_badness, at ipa-inline.c:1028)
Date: Tue, 02 May 2017 08:29:00 -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-562217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 08:32:03 2017
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Subject: [Bug target/80568] x86 -mavx256-split-unaligned-load (and store) is affecting AVX2 code, but probably shouldn't be.
Date: Tue, 02 May 2017 08:32:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
It was a bugfix and it's now working as intended AFAIK. You can search for
duplicate bugreports.
>From gcc-bugs-return-562218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 08:35:12 2017
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Subject: [Bug target/80570] auto-vectorizing int->double conversion should use half-width memory operands to avoid shuffles, instead of load+extract
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
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Blocks| |53947
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The vectorizer doesn't have the ability to avoid unpacking /
packing
by using half-width vectors when it feeds packing/unpacking conversions.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53947
[Bug 53947] [meta-bug] vectorizer missed-optimizations
>From gcc-bugs-return-562219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 08:38:25 2017
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Subject: [Bug tree-optimization/80574] GCC fail to optimize nested ternary
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>From gcc-bugs-return-562220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 08:40:11 2017
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Subject: [Bug c++/80577] Avoid using adj in member function pointers
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----------------------------------------------------------------------------
Keywords| |missed-optimization
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I don't think we exploit 'final' for code generation yet.
>From gcc-bugs-return-562221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 08:42:18 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/80580] GIMPLEFE ICE on invalid code (fuzz testing)
Date: Tue, 02 May 2017 08:42:00 -0000
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Thanks. Fuzzing / fixing issues in the parser itself is ok. Catching late
reported errors due to invalid GIMPLE in the input as we do now is expected
(the GIMPLE verifier will usually report an error and then ICE).
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Subject: [Bug ada/80590] [ada] non-bootstrap build failure in ada -- Error reporting routines re-entered
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--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
The workaround is probably to use the same compiler as base compiler.
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Subject: [Bug ada/80590] [ada] non-bootstrap build failure in ada -- Error reporting routines re-entered
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--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 41296
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41296&action=edit
ads.tgz
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Subject: [Bug tree-optimization/80591] New: [7/8 Regression] AArch64 kernel miscompilation starting with r246809
Date: Tue, 02 May 2017 08:53:00 -0000
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Bug ID: 80591
Summary: [7/8 Regression] AArch64 kernel miscompilation
starting with r246809
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
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struct S {
char p[6300];
int s;
};
static inline __attribute__((always_inline)) struct S *
foo (void)
{
unsigned long sp;
asm ("" : "=r" (sp));
return (struct S *) sp;
}
void
bar (void)
{
foo ()->s++;
}
is miscompiled starting with r246809 at -O2 (tried cross to aarch64-linux as
well as x86_64-linux native), the increment is optimized away.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug target/80583] [6/7/8 Regression] ICE with target_clones and vectorized float: internal compiler error: in convert_move, at expr.c:270
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r229595 when multiversioning was added. I'll take a
look.
>From gcc-bugs-return-562227-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 08:57:37 2017
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Subject: [Bug tree-optimization/80591] [7/8 Regression] AArch64 kernel miscompilation starting with r246809
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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 difference is in cddce1 dump:
Marking useful stmt: _7->s = _3;
no longer happens.
>From gcc-bugs-return-562228-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 09:18:51 2017
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Subject: [Bug sanitizer/80578] -fsanitize=undefined report yields memory leak
Date: Tue, 02 May 2017 09:18:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, it's caused by fact that the vptr ubsan error calls demangler to
display type name. That's the place where the memory is allocated and not
properly released.
If you take a look at
libsanitizer/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cc, there's
comment that confirms it's a known issue:
const char *DemangleCXXABI(const char *name) {
// FIXME: __cxa_demangle aggressively insists on allocating memory.
// There's not much we can do about that, short of providing our
// own demangler (libc++abi's implementation could be adapted so that
// it does not allocate). For now, we just call it anyway, and we leak
// the returned value.
if (__cxxabiv1::__cxa_demangle)
if (const char *demangled_name =
__cxxabiv1::__cxa_demangle(name, 0, 0, 0))
return demangled_name;
return name;
}
I'm assigning that low priority.
>From gcc-bugs-return-562229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 09:20:46 2017
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Subject: [Bug tree-optimization/80591] [7/8 Regression] AArch64 kernel miscompilation starting with r246809
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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> ---
Testing reversal.
>From gcc-bugs-return-562230-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 09:26:21 2017
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Subject: [Bug other/78678] possibly missing -Warray-bounds warning
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, very nice example :) I'm attaching reduced test-case.
Problem is that without -fsanitize=object-size, we fold lt_lcd_regs[20] in
einline here in fold_array_ctor_reference:
6152 /* When memory is not explicitely mentioned in constructor,
6153 it is 0 (or out of range). */
6154 return build_zero_cst (type);
Using the sanitizer preserves following statement:
UBSAN_OBJECT_SIZE (<_lcd_regs[20], _7, 36, 0);
which is identified by VRP as the warning. The code that folds to zero was
written by Richi, I'm CCing for ideas. Maybe we can be more conservative is
some situations?
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Subject: [Bug other/78678] possibly missing -Warray-bounds warning
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 41297
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41297&action=edit
reduced test-case
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Subject: [Bug other/80589] Typing mistakes in two messages
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-02
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, I'll commit that to trunk soon.
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Subject: [Bug other/78678] possibly missing -Warray-bounds warning
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--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 2 May 2017, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78678
>
> Martin Liška <marxin at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |NEW
> Last reconfirmed| |2017-05-02
> CC| |marxin at gcc dot gnu.org,
> | |rguenth at gcc dot gnu.org
> Ever confirmed|0 |1
>
> --- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
> Confirmed, very nice example :) I'm attaching reduced test-case.
>
> Problem is that without -fsanitize=object-size, we fold lt_lcd_regs[20] in
> einline here in fold_array_ctor_reference:
>
>
> 6152 /* When memory is not explicitely mentioned in constructor,
> 6153 it is 0 (or out of range). */
> 6154 return build_zero_cst (type);
>
> Using the sanitizer preserves following statement:
>
> UBSAN_OBJECT_SIZE (<_lcd_regs[20], _7, 36, 0);
>
> which is identified by VRP as the warning. The code that folds to zero was
> written by Richi, I'm CCing for ideas. Maybe we can be more conservative is
> some situations?
Well, we could "improve" get_array_ctor_element_at_index to handle
missing ctor elements (equal to zero). But as we can't rely on
the array ctor having a proper TYPE_DOMAIN to specify the upper bound
we cannot reliably detect out-of-bound accesses (which would be ok
to not fold IMHO, at least if they are not trailing arrays).
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Subject: [Bug other/80589] Typing mistakes in two messages
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue May 2 09:38:55 2017
New Revision: 247485
URL: https://gcc.gnu.org/viewcvs?rev=247485&root=gcc&view=rev
Log:
Fix 2 typos in documentation (PR other/80589).
2017-05-02 Martin Liska <mliska@suse.cz>
PR other/80589
* common.opt: Fix typo.
* doc/invoke.texi: Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/common.opt
trunk/gcc/doc/invoke.texi
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Subject: [Bug other/80589] Typing mistakes in two messages
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.0
Known to fail| |5.4.0, 6.3.0, 7.0.1
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk, queued for active branches.
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Subject: [Bug ipa/80581] [8 Regression] ICE: in estimate_node_size_and_time, at ipa-inline-analysis.c:3425
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
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Subject: [Bug target/80583] [6/7/8 Regression] ICE with target_clones and vectorized float: internal compiler error: in convert_move, at expr.c:270
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|--- |6.4
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Subject: [Bug other/78678] possibly missing -Warray-bounds warning
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
I see, but what about comparing the access to TYPE_SIZE of a variable:
diff --git a/gcc/gimple-fold.c b/gcc/gimple-fold.c
index 5ebdcdfd796..d493b27f536 100644
--- a/gcc/gimple-fold.c
+++ b/gcc/gimple-fold.c
@@ -6134,6 +6134,12 @@ fold_array_ctor_reference (tree type, tree ctor,
tree domain_type = NULL_TREE;
HOST_WIDE_INT inner_offset;
+ /* Accessing a ctor elements that actually points after a declaration is
+ an undefined behavior. */
+ tree decl_size = TYPE_SIZE (TREE_TYPE (from_decl));
+ if (tree_fits_uhwi_p (decl_size) && offset >= tree_to_uhwi (decl_size))
+ return NULL;
+
/* Compute low bound and elt size. */
if (TREE_CODE (TREE_TYPE (ctor)) == ARRAY_TYPE)
domain_type = TYPE_DOMAIN (TREE_TYPE (ctor));
It's completely untested patch.
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Subject: [Bug sanitizer/80578] -fsanitize=undefined report yields memory leak
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #1)
> Confirmed, it's caused by fact that the vptr ubsan error calls demangler to
> display type name. That's the place where the memory is allocated and not
> properly released.
>
> If you take a look at
> libsanitizer/sanitizer_common/sanitizer_symbolizer_posix_libcdep.cc, there's
> comment that confirms it's a known issue:
>
> const char *DemangleCXXABI(const char *name) {
> // FIXME: __cxa_demangle aggressively insists on allocating memory.
> // There's not much we can do about that, short of providing our
> // own demangler (libc++abi's implementation could be adapted so that
> // it does not allocate). For now, we just call it anyway, and we leak
> // the returned value.
The __cxxabiv1::__cxa_demangle behavior is mandated by the ABI, including the
fact that it invokes malloc and which way.
> if (__cxxabiv1::__cxa_demangle)
> if (const char *demangled_name =
> __cxxabiv1::__cxa_demangle(name, 0, 0, 0))
> return demangled_name;
>
> return name;
> }
>
> I'm assigning that low priority.
libsupc++.a provides __gcclibcxx_demangle_callback alternative entrypoint next
to __cxa_demangle, with a callback where libsanitizer could take care of the
allocations or lack thereof (though, in that case it should really just be
printing it directly, because the callback can be called multiple times for
smaller parts of the demangled name) as it pleases.
>From gcc-bugs-return-562240-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 10:06:17 2017
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug other/78678] possibly missing -Warray-bounds warning
Date: Tue, 02 May 2017 10:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78678
--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 2 May 2017, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78678
>
> --- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
> I see, but what about comparing the access to TYPE_SIZE of a variable:
>
> diff --git a/gcc/gimple-fold.c b/gcc/gimple-fold.c
> index 5ebdcdfd796..d493b27f536 100644
> --- a/gcc/gimple-fold.c
> +++ b/gcc/gimple-fold.c
> @@ -6134,6 +6134,12 @@ fold_array_ctor_reference (tree type, tree ctor,
> tree domain_type = NULL_TREE;
> HOST_WIDE_INT inner_offset;
>
> + /* Accessing a ctor elements that actually points after a declaration is
> + an undefined behavior. */
> + tree decl_size = TYPE_SIZE (TREE_TYPE (from_decl));
> + if (tree_fits_uhwi_p (decl_size) && offset >= tree_to_uhwi (decl_size))
> + return NULL;
> +
> /* Compute low bound and elt size. */
> if (TREE_CODE (TREE_TYPE (ctor)) == ARRAY_TYPE)
> domain_type = TYPE_DOMAIN (TREE_TYPE (ctor));
>
> It's completely untested patch.
That's not going to work -- for constructors of constructors we adjust
offset and thus offset is not from_decl-based.
>From gcc-bugs-return-562241-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 10:08:31 2017
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Subject: [Bug other/78678] possibly missing -Warray-bounds warning
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78678
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
>
> That's not going to work -- for constructors of constructors we adjust
> offset and thus offset is not from_decl-based.
Ok :/ So we probably won't be able to fix this PR, right?
>From gcc-bugs-return-562242-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 10:15:03 2017
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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/80592] New: gcc fails to detect overflow in shift statement
Date: Tue, 02 May 2017 10:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80592
Bug ID: 80592
Summary: gcc fails to detect overflow in shift statement
Product: gcc
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For this C/C++ source code, derived from the linux kernel:
#define TU_SIZE_RECOMMENDED (0x3f << 16)
extern void g( int);
void f()
{
int max_tu_symbol = TU_SIZE_RECOMMENDED - 1;
g(max_tu_symbol << 23);
}
gcc doesn't seem able to detect the overflow into 44 bits.
$ ~/gcc/results/bin/gcc -c -O2 -Wall -Wextra -Wstrict-overflow -Wconversion
may2b.cc
$
>From gcc-bugs-return-562243-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 10:28:26 2017
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Subject: [Bug other/78678] possibly missing -Warray-bounds warning
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78678
--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Tue, 2 May 2017, marxin at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78678
>
> Martin Liška <marxin at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |msebor at gcc dot gnu.org
>
> --- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
> >
> > That's not going to work -- for constructors of constructors we adjust
> > offset and thus offset is not from_decl-based.
>
> Ok :/ So we probably won't be able to fix this PR, right?
Not easily, no.
>From gcc-bugs-return-562244-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 10:34:38 2017
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Subject: =?UTF-8?B?W0J1ZyBjKysvODA1OTNdIE5ldzogR0NDIDcsIGFsaWduZWRfc3RvcmFnZSBh?= =?UTF-8?B?bmQg4oCcZGVyZWZlcmVuY2luZyB0eXBlLXB1bm5lZCBwb2ludGVyIHdpbGwg?= =?UTF-8?B?YnJlYWsgc3RyaWN0LWFsaWFzaW5nIHJ1bGVz4oCd?Date: Tue, 02 May 2017 10:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80593
Bug ID: 80593
Summary: GCC 7, aligned_storage and “dereferencing type-punned
pointer will break strict-aliasing rulesâ€
Product: gcc
Version: 7.0.1
Status: UNCONFIRMED
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I've posted this info to the gcc mailing list. Richard Biener suggested opening
a bug report, so here it is.
https://gcc.gnu.org/ml/gcc/2017-05/msg00013.html
Following example code is warning-free on GCC 4.9, GCC 5 and GCC 6. It is also
warning free on some older GCC 7 snapshots (like 7-20170409).
-- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 --
$ cat punning.cpp
template<unsigned _Len, unsigned _Align>
struct aligned_storage
{
union type
{
unsigned char __data[_Len];
struct __attribute__((__aligned__((_Align)))) { } __align;
};
};
aligned_storage<sizeof(int), alignof(int)>::type storage;
int main()
{
*reinterpret_cast<int*>(&storage) = 42;
}
$ g++ -Wall -O2 -c punning.cpp
$
-- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 --
However in the most recent GCC 7 snapshots (including both RCs), it gives a
warning about type punning:
-- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 --
$ g++ -Wall -O2 -c punning.cpp
punning.cpp: In function 'int main()':
punning.cpp:15:35: warning: dereferencing type-punned pointer will break
strict-aliasing rules [-Wstrict-aliasing]
*reinterpret_cast<int*>(&storage) = 42;
^
$
-- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 -- >8 --
>From gcc-bugs-return-562245-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 10:46:39 2017
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Subject: [Bug lto/77954] LTO_STREAMER_DEBUG ICE with OpenMP SIMD clones
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, I've got patch for that.
>From gcc-bugs-return-562246-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 10:51:20 2017
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |diagnostic
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-02
Target Milestone|--- |7.2
Summary|GCC 7, aligned_storage and |[7/8 Regression] GCC 7,
|“dereferencing type-punned |aligned_storage and
|pointer will break |“dereferencing type-punned
|strict-aliasing rules†|pointer will break
| |strict-aliasing rulesâ€
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. This likely regressed with the introduction of
TYPE_TYPELESS_STORAGE which aligned_storage now is, and thus 'storage' gets
alias-set zero itself running into
/* warn_strict_aliasing >= 3. This includes the default (3).
Only warn if the cast is dereferenced immediately. */
alias_set_type set1
= get_alias_set (TREE_TYPE (TREE_OPERAND (expr, 0)));
alias_set_type set2 = get_alias_set (TREE_TYPE (type));
if (set1 != set2 && set2 != 0
&& (set1 == 0
|| (!alias_set_subset_of (set2, set1)
&& !alias_sets_conflict_p (set1, set2))))
{
warning (OPT_Wstrict_aliasing, "dereferencing type-punned "
"pointer will break strict-aliasing rules");
return true;
with set1 == 0.
>From gcc-bugs-return-562247-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 11:19:19 2017
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Subject: [Bug c/80592] gcc fails to detect overflow in shift statement
Date: Tue, 02 May 2017 11:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80592
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-02
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, any of releases I have (4.5.0+) can't catch that.
Just a nit: -Wstrict-overflow needs -fstrict-overflow and the warning has
various levels. Anyhow -Wstrict-overflow=5 and -fstrict-overflow does not work.
Btw. -fsanitize=undefined can catch that easily:
$ cat pr80592.c
#define TU_SIZE_RECOMMENDED (0x3f << 16)
void g( int a)
{
__builtin_printf ("value: %d\n", a);
}
int main()
{
int max_tu_symbol = TU_SIZE_RECOMMENDED - 1;
g(max_tu_symbol << 23);
return 0;
}
g++ -O2 -fsanitize=undefined pr80592.c && ./a.out
pr80592.c:12:21: runtime error: left shift of 4128767 by 23 places cannot be
represented in type 'int'
value: -8388608
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From: "wilco at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/79964] Cortex A53 codegen still not optimal
Date: Tue, 02 May 2017 11:25:00 -0000
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--- Comment #3 from wilco at gcc dot gnu.org ---
(In reply to PeteVine from comment #2)
> I can confirm the first part of the issue gets fixed with this patch:
>
> https://gcc.gnu.org/ml/gcc-patches/2017-04/msg01415.html
There are a few more division patches on the way, eg.
https://gcc.gnu.org/ml/gcc-patches/2017-04/msg01312.html is one of them,
another should remove the redundant shift.
> but there's a regression in gcc8 concerning the second part. (or rather the
> workarounds don't work any more)
>
> http://openbenchmarking.org/result/1704298-RI-CRAYREGRE13
>
> ("basic flags" didn't deactivate -mfix-cortex-a53-843419, hence the
> difference)
I'm not sure what you're trying to measure here - it's very confusing with
multiple overlapping options (O3/Ofast/tree-vectorize), -mcpu/-march. Is it
related to -fipa-pta or is that not relevant?
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Subject: [Bug tree-optimization/80549] [7/8 Regression] wrong code at -O2 and -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu (executable does not terminate)
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 2 11:24:52 2017
New Revision: 247486
URL: https://gcc.gnu.org/viewcvs?rev=247486&root=gcc&view=rev
Log:
2017-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/80549
* tree-cfgcleanup.c (mfb_keep_latches): New helper.
(cleanup_tree_cfg_noloop): Create forwarders to known loop
headers if they do not have a preheader.
* gcc.dg/torture/pr80549.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr80549.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-cfgcleanup.c
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Subject: [Bug tree-optimization/80591] [7/8 Regression] AArch64 kernel miscompilation starting with r246809
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 2 11:27:15 2017
New Revision: 247488
URL: https://gcc.gnu.org/viewcvs?rev=247488&root=gcc&view=rev
Log:
2017-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/80591
Revert
2017-04-10 Richard Biener <rguenther@suse.de>
* tree-ssa-structalias.c (find_func_aliases): Properly handle
asm inputs.
* gcc.dg/torture/pr80591.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr80591.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-structalias.c
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Subject: [Bug tree-optimization/80591] [7/8 Regression] AArch64 kernel miscompilation starting with r246809
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue May 2 11:26:25 2017
New Revision: 247487
URL: https://gcc.gnu.org/viewcvs?rev=247487&root=gcc&view=rev
Log:
2017-05-02 Richard Biener <rguenther@suse.de>
PR tree-optimization/80591
Revert
2017-04-10 Richard Biener <rguenther@suse.de>
* tree-ssa-structalias.c (find_func_aliases): Properly handle
asm inputs.
* gcc.dg/torture/pr80591.c: New testcase.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/torture/pr80591.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/tree-ssa-structalias.c
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Subject: [Bug tree-optimization/80591] [7/8 Regression] AArch64 kernel miscompilation starting with r246809
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/80549] [7 Regression] wrong code at -O2 and -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu (executable does not terminate)
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |8.0
Summary|[7/8 Regression] wrong code |[7 Regression] wrong code
|at -O2 and -O3 in both |at -O2 and -O3 in both
|32-bit and 64-bit modes on |32-bit and 64-bit modes on
|x86_64-linux-gnu |x86_64-linux-gnu
|(executable does not |(executable does not
|terminate) |terminate)
Known to fail| |7.1.0
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
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Subject: [Bug c++/80561] Missed optimization: std::array data is aligned if array is aligned
Date: Tue, 02 May 2017 11:57:00 -0000
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, the reason is that the actual memory reference does not expose this
alignment.
The vectorizer sees
MEM[(const value_type &)v2_7(D)][_1]
<array_ref 0x7ffff56ac540
type <real_type 0x7ffff68cee70 double readonly type_6 DF
size <integer_cst 0x7ffff68a2eb8 constant 64>
unit size <integer_cst 0x7ffff68a2ed0 constant 8>
align 64 symtab 0 alias set -1 canonical type 0x7ffff68cee70 precision
64
pointer_to_this <pointer_type 0x7ffff68cef18> reference_to_this
<reference_type 0x7ffff5d335e8>>
readonly
arg 0 <mem_ref 0x7ffff56ae410
type <array_type 0x7ffff5817b28 _Type type <real_type 0x7ffff68cee70
double>
BLK
size <integer_cst 0x7ffff61c9eb8 constant 512>
unit size <integer_cst 0x7ffff61c9ee8 constant 64>
align 64 symtab 0 alias set -1 canonical type 0x7ffff5817a80 domain
<integer_type 0x7ffff6759738>
pointer_to_this <pointer_type 0x7ffff596eb28> reference_to_this
<reference_type 0x7ffff5817bd0>>
tree_0
arg 0 <ssa_name 0x7ffff5688cf0 type <reference_type 0x7ffff5816348>
visited var <parm_decl 0x7ffff5811a00 v2>
where the MEM_REF is of an array type with natural alignment and the
function parameter as of GCCs own rule doesn't have any special
alignment just because of its type (see other PRs).
The FE presents us with
(void) (*SAVE_EXPR <std::array<double, 8>::operator[] ((struct Vec *) v1,
(size_type) i)> = TARGET_EXPR <D.25081, NON_LVALUE_EXPR <*std::array<double,
8>::operator[] ((const struct Vec *) v2, (size_type) i)>>;, *SAVE_EXPR
<std::array<double, 8>::operator[] ((struct Vec *) v1, (size_type) i)> +
D.25081;) >>>>>;
and inside libstdc++ the actual memory access is of course formed not
taking into accout alignment of the std::array object itself (of course?).
Workaround:
#include <array>
static constexpr size_t my_elements = 8;
typedef std::array<double, my_elements> Vec __attribute__((aligned(32)));
// typedef double Vec[my_elements] __attribute__((aligned(32)));
void func(Vec& __restrict__ v1, const Vec& v2)
{
Vec *vv1 = (Vec *)__builtin_assume_aligned (&v1, 32);
Vec *vv2 = (Vec *)__builtin_assume_aligned (&v2, 32);
for (unsigned i = 0; i < my_elements; ++i)
{
(*vv1)[i] += (*vv2)[i];
}
}
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Subject: [Bug c++/80561] Missed optimization: std::array data is aligned if array is aligned
Date: Tue, 02 May 2017 12:03:00 -0000
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--- Comment #3 from John Zwinck <jzwinck at gmail dot com> ---
I'm aware of the workaround using __builtin_assume_aligned() - you can see I
formulated an equivalent but pure C++ workaround using alignas() in the
aforementioned Stack Overflow post. But 99% of users won't know to do that, so
will pay a runtime cost for a C++ abstraction which is supposed to be free.
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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> ---
Indeed, started with r246866.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80594
Bug ID: 80594
Summary: error: ‘SDL_Window’ does not name a type
Product: gcc
Version: unknown
Status: UNCONFIRMED
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Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Created attachment 41298
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41298&action=edit
precompiled header file
As a c++ programmer with 20+years of experience,
i am trying to compile a visual c++ project under linux.
i tried a testprogramm that included the SDL2/SDL.h library
and it worked. when i was compiling my code the compiler gave me the error
mentioned above.
i think i made no mistake so i am asking you to support me.
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4)
command line: gcc aicontrol.cpp -fpermissive
here the dump of the console:
gcc aicontrol.cpp -fpermissive
In file included from unit.h:6:0,
from mech.h:4,
from control.h:4,
from AIControl.h:6,
from aicontrol.cpp:1:
screen.h:19:2: error: ‘SDL_Window’ does not name a type
SDL_Window* window;
^
In file included from mech.h:4:0,
from control.h:4,
from AIControl.h:6,
from aicontrol.cpp:1:
unit.h:266:1: warning: ‘typedef’ was ignored in this declaration
};
^
In file included from control.h:4:0,
from AIControl.h:6,
from aicontrol.cpp:1:
mech.h:406:19: warning: non-static data member initializers only available with
-std=c++11 or -std=gnu++11
bool critfirst = true;
^
mech.h: In member function ‘void mech::initfromfile(std::__cxx11::string)’:
mech.h:78:34: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fscanff(f, "%s\n%s\n%s\n", name);
^
mech.h:79:34: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fscanff(f, "%s\n%s\n%s\n", name);
^
mech.h:80:21: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Mass:"); fscanf(f, "%i\n", &tons);
^
mech.h:81:27: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Heat Sinks:"); fscanf(f, "%f\n", &heatsinks); heatsinks =
(int)he
^
mech.h:83:24: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Walk MP:"); fscanf(f, "%f\n", &bpwalk); bpwalk = (int)bpwalk;
^
mech.h:84:24: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Jump MP:"); fscanf(f, "%f\n", &bpjump); bpjump = (int)bpjump;
^
mech.h:85:22: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Armor:");
^
mech.h:88:23: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Armor:"); fscanf(f, "%i\n", &armor[t]);
^
mech.h:90:25: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Left Arm:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n",
te
^
mech.h:90:82: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
"Left Arm:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n", text);
componen
^
mech.h:91:26: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Right Arm:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n",
t
^
mech.h:91:83: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
Right Arm:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n", text);
componen
^
mech.h:92:27: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Left Torso:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n",
^
mech.h:92:84: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
eft Torso:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n", text);
componen
^
mech.h:93:28: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Right Torso:"); for (int t = 0; t < 12; t++) { fscanff(f,
"%s\n",
^
mech.h:93:85: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
ght Torso:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n", text);
componen
^
mech.h:94:29: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Center Torso:"); for (int t = 0; t < 12; t++) { fscanff(f,
"%s\n"
^
mech.h:94:86: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
ter Torso:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n", text);
componen
^
mech.h:95:21: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Head:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n",
text);
^
mech.h:95:78: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
(f, "Head:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n", text);
componen
^
mech.h:96:25: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Left Leg:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n",
te
^
mech.h:96:82: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
"Left Leg:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n", text);
componen
^
mech.h:97:26: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "Right Leg:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n",
t
^
mech.h:97:83: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
Right Leg:"); for (int t = 0; t < 12; t++) { fscanff(f, "%s\n", text);
componen
^
mech.h:102:19: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "HD:"); fscanf(f, "%i\n", &innerstructure[0]);
^
mech.h:103:25: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "CT Torso:"); fscanf(f, "%i\n", &innerstructure[1]);
^
mech.h:104:26: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "L/R Torso:"); fscanf(f, "%i\n", &innerstructure[2]);
innerstructu
^
mech.h:105:24: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "L/R Arm:"); fscanf(f, "%i\n", &innerstructure[4]);
innerstructure
^
mech.h:106:24: warning: deprecated conversion from string constant to ‘char*’
[-Wwrite-strings]
fsearch(f, "L/R Leg:"); fscanf(f, "%i\n", &innerstructure[6]);
innerstructure
^
In file included from AIControl.h:7:0,
from aicontrol.cpp:1:
input.h: In member function ‘void input::init()’:
input.h:20:37: error: ‘SDL_GetKeyboardState’ was not declared in this scope
keyboard = SDL_GetKeyboardState(&d); printf("%i keys\n", d);
^
input.h: In member function ‘bool input::tick()’:
input.h:38:19: error: ‘SDL_MOUSEWHEEL’ was not declared in this scope
if (e.type == SDL_MOUSEWHEEL)
^
input.h:40:15: error: ‘SDL_Event {aka union SDL_Event}’ has no member named
‘wheel’
MSz += e.wheel.y*(e.wheel.direction == SDL_MOUSEWHEEL_NORMAL ? 1 : -1);
^
input.h:40:26: error: ‘SDL_Event {aka union SDL_Event}’ has no member named
‘wheel’
MSz += e.wheel.y*(e.wheel.direction == SDL_MOUSEWHEEL_NORMAL ? 1 : -1);
^
input.h:40:45: error: ‘SDL_MOUSEWHEEL_NORMAL’ was not declared in this scope
MSz += e.wheel.y*(e.wheel.direction == SDL_MOUSEWHEEL_NORMAL ? 1 : -1);
^
input.h: In member function ‘bool input::isKey(char*)’:
input.h:66:3: error: ‘SDL_Scancode’ was not declared in this scope
SDL_Scancode scan = SDL_GetScancodeFromName(key);
^
input.h:67:7: error: ‘scan’ was not declared in this scope
if (scan == 0) { printf("unknown key %s\n", key); return false; }
^
input.h:68:20: error: ‘scan’ was not declared in this scope
return (keyboard[scan] != 0);
^
input.h: In member function ‘bool input::isKeyOnce(char*)’:
input.h:74:41: error: ‘SDL_GetScancodeFromName’ was not declared in this scope
int scan = SDL_GetScancodeFromName(key);
^
In file included from aicontrol.cpp:1:0:
AIControl.h: In member function ‘void aicontrol::setTorso(mech*)’:
AIControl.h:82:2: error: expected primary-expression before ‘/’ token
*/
^
AIControl.h:83:3: error: expected primary-expression before ‘}’ token
}
^
In file included from aicontrol.cpp:1:0:
AIControl.h: In member function ‘vec2 aicontrol::lookaround(unit*)’:
AIControl.h:305:60: error: invalid initialization of non-const reference of
type ‘line&’ from an rvalue of type ‘line’
if (a->theboard->themap_o->walk(line(pl[t], pl2[tt]), a) < maxwalk)
^
In file included from nav.h:6:0,
from unit.h:5,
from mech.h:4,
from control.h:4,
from AIControl.h:6,
from aicontrol.cpp:1:
map.h:35:8: note: initializing argument 1 of ‘float map::walk(line&, unit*)’
float walk(line &b, unit* travfunc);
^
sundancer@sundancer-B85M-D2V /media/sundancer/Coding/_Source/RoboWar/!Source $
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
5.4.0-6ubuntu1~16.04.4' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4)
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/78687] inefficient code generated for eggs.variant
Date: Tue, 02 May 2017 12:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78687
--- Comment #7 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Tue May 2 12:49:55 2017
New Revision: 247497
URL: https://gcc.gnu.org/viewcvs?rev=247497&root=gcc&view=rev
Log:
[PR 78687] Set SRA grp_write lazily
2017-05-02 Martin Jambor <mjambor@suse.cz>
PR tree-optimization/78687
* tree-sra.c (access): New field parent.
(process_subtree_disqualification): New function.
(disqualify_candidate): Call it.
(build_accesses_from_assign): Reset write flag if creating an
assighnment link.
(build_access_subtree): Fill in parent field and also prpagate
down grp_write flag.
(create_artificial_child_access): New parameter set_grp_write, set
grp_write to its value.
(propagate_subaccesses_across_link): Also propagate grp_write flag
values.
(propagate_all_subaccesses): Push the closest parent back to work
queue if add_access_to_work_queue returned true.
testsuite/
* g++.dg/tree-ssa/pr78687.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/tree-ssa/pr78687.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-sra.c
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Subject: [Bug tree-optimization/78687] inefficient code generated for eggs.variant
Date: Tue, 02 May 2017 12:54:00 -0000
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #8 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Fixed with https://gcc.gnu.org/ml/gcc-patches/2017-04/msg01405.html
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Subject: [Bug ipa/80581] [8 Regression] ICE: in estimate_node_size_and_time, at ipa-inline-analysis.c:3425
Date: Tue, 02 May 2017 12:56:00 -0000
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--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
This is an roundoff issue. While summing the times it happens that n*1000/1000
> n. The following patch should silence it unless they cummulate for very
large value (which I will likely want to investigate then)
Index: ipa-inline-analysis.c
===================================================================
--- ipa-inline-analysis.c (revision 247436)
+++ ipa-inline-analysis.c (working copy)
@@ -3422,7 +3422,7 @@ estimate_node_size_and_time (struct cgra
min_size = (*info->entry)[0].size;
gcc_checking_assert (size >= 0);
gcc_checking_assert (time >= 0);
- gcc_checking_assert (nonspecialized_time >= time);
+ gcc_checking_assert ((nonspecialized_time - time).to_int () >= 0);
if (info->loop_iterations
&& !evaluate_predicate (info->loop_iterations, possible_truths))
I will commit it after regtesting.
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Subject: [Bug fortran/80467] Function Without Arguments Fails to Generate Error When Declared Later
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--- Comment #2 from Jeffrey Armstrong <jeffrey.armstrong at approximatrix dot com> ---
I agree that the code is invalid, and it is the user's responsibility.
However, I don't think an internal compiler error is appropriate in this case.
An actual error would be preferable.
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d25fe0be@ <d25fe0be at outlook dot com> changed:
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CC| |d25fe0be at outlook dot com
--- Comment #1 from d25fe0be@ <d25fe0be at outlook dot com> ---
$ grep SDL_Window test.ii
SDL_Window* window;
$
Just as what the compiler says, SDL_Window is not declared (at least in the
attached preprocessed source file).
Make sure you have included the appropriate header files, and SDL_Window's
declaration is not guarded by some macro(s) that are missing when compiling
with GCC.
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Subject: [Bug fortran/80467] Function Without Arguments Fails to Generate Error When Declared Later
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--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> I agree that the code is invalid, and it is the user's responsibility.
> However, I don't think an internal compiler error is appropriate in this case.
AFAICT you get the internal error only with compilers configured with
--enable-checking=yes.
> An actual error would be preferable.
Agreed, but as an enhancement with a low priority.
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Tue, 02 May 2017 13:10:00 -0000
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--- Comment #8 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> It looks like gnat1 was compiled with libgcc, which is not able to
> handle unwinding on Darwin.
> I suppose it must be linked without -static-libgcc
This was handled properly on darwin up to r247298. The changes in r247301
should be updated to work properly on darwin.
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Subject: [Bug fortran/80467] Function Without Arguments Fails to Generate Error When Declared Later
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--- Comment #4 from Jeffrey Armstrong <jeffrey.armstrong at approximatrix dot com> ---
> AFAICT you get the internal error only with compilers configured with
> --enable-checking=yes.
I was refering to a compiler crash occurring on a non-trivial program:
internal compiler error: in convert_move, at expr.c:268
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <...> for instructions.
Error(E42): Last command making (build\pn432x.o) returned a bad status
Error(E02): Make execution terminated
The trivial example I provided does not crash the compiler, but the
gcc_assert() at expr.c:268 seems to trigger an ICE under non-trivial
conditions.
I can try to work up an example that causes the ICE, but I can't provide the
source code to the particular file.
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Subject: [Bug fortran/80467] Function Without Arguments Fails to Generate Error When Declared Later
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--- Comment #5 from Jeffrey Armstrong <jeffrey.armstrong at approximatrix dot com> ---
It's actually easy to trigger the ICE with a small change. The following
causes an internal compiler error wiht GCC 6.3 under MinGW-W64:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
program noargs
implicit none
Print *, "Testing..."
Call TestArgs
Print *, "Done."
contains
Subroutine TestArgs
implicit none
Real::compareTo
Integer::i
compareTo = GetValue
do i=1,10
if(Real(i) > GetValue) Then
Print *, "bigger"
end if
end do
End Subroutine TestArgs
Function GetValue()
implicit none
Real::GetValue
GetValue = 3.0
End Function GetValue
end program noargs
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
In this case, the user is repeatedly and incorrectly calling GetValue without
arguments. The compiler output is:
test.f90:10:0:
Subroutine TestArgs
internal compiler error: in convert_move, at expr.c:268
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <...> for instructions.
Error(E42): Last command making (build\test.o) returned a bad status
Error(E02): Make execution terminated
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From: "stefan.frijters at vortech dot nl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/80595] New: [OOP] ICE using allocate with mold
Date: Tue, 02 May 2017 14:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80595
Bug ID: 80595
Summary: [OOP] ICE using allocate with mold
Product: gcc
Version: 6.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: stefan.frijters at vortech dot nl
Target Milestone: ---
The following example produces an ICE/segfault on gfortran 6.1.1, as well as
gfortran 5.4.0:
module ice
type iceObject
end type
type :: iceObjectPtr
type(iceObject), allocatable :: ptr
end type
type :: iceObjects
private
type(iceObjectPtr), allocatable :: objects(:)
end type
contains
subroutine ice_create(this, mold)
class(iceObjects) :: this
class(iceObject) :: mold
allocate( this%objects(1)%ptr, mold=mold )
end subroutine
end module
Driving: gfortran -v -save-temps ice.f90 -l gfortran -l m -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/6/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
6.1.1-3ubuntu11~14.04.1' --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=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-6-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-6-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-6-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 6.1.1 20160511 (Ubuntu 6.1.1-3ubuntu11~14.04.1)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/6/f951 ice.f90 -quiet -dumpbase ice.f90
-mtune=generic -march=x86-64 -auxbase ice -version -fintrinsic-modules-path
/usr/lib/gcc/x86_64-linux-gnu/6/finclude -o ice.s
GNU Fortran (Ubuntu 6.1.1-3ubuntu11~14.04.1) version 6.1.1 20160511
(x86_64-linux-gnu)
compiled by GNU C version 6.1.1 20160511, GMP version 5.1.3, MPFR
version 3.1.3, MPC version 1.0.1, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU Fortran2008 (Ubuntu 6.1.1-3ubuntu11~14.04.1) version 6.1.1 20160511
(x86_64-linux-gnu)
compiled by GNU C version 6.1.1 20160511, GMP version 5.1.3, MPFR
version 3.1.3, MPC version 1.0.1, isl version 0.15
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ice.f90:20:0:
allocate( this%objects(1)%ptr, mold=mold )
internal compiler error: Segmentation fault
0xa454cf crash_signal
../../src/gcc/toplev.c:333
0x68b90e gfc_class_vptr_get(tree_node*)
../../src/gcc/fortran/trans-expr.c:151
0x68f309 class_vtab_field_get
../../src/gcc/fortran/trans-expr.c:222
0x68f309 gfc_class_vtab_copy_get(tree_node*)
../../src/gcc/fortran/trans-expr.c:244
0x68f309 gfc_copy_class_to_class(tree_node*, tree_node*, tree_node*, bool)
../../src/gcc/fortran/trans-expr.c:1116
0x6c96e4 gfc_trans_allocate(gfc_code*)
../../src/gcc/fortran/trans-stmt.c:6137
0x664b47 trans_code
../../src/gcc/fortran/trans.c:1840
0x68814c gfc_generate_function_code(gfc_namespace*)
../../src/gcc/fortran/trans-decl.c:6154
0x6680b1 gfc_generate_module_code(gfc_namespace*)
../../src/gcc/fortran/trans.c:2058
0x620bcd translate_all_program_units
../../src/gcc/fortran/parse.c:5600
0x620bcd gfc_parse_file()
../../src/gcc/fortran/parse.c:5819
0x661f02 gfc_be_parse_file
../../src/gcc/fortran/f95-lang.c:201
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From: "paul.kaletta at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80596] New: g++ generates incomplete DWARF debug information for array-typedefs
Date: Tue, 02 May 2017 14:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80596
Bug ID: 80596
Summary: g++ generates incomplete DWARF debug information for
array-typedefs
Product: gcc
Version: 6.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: paul.kaletta at intel dot com
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The following observations apply to g++ 6.1.0 and earlier.
Consider the following program:
typedef int T_ACCESS_TECHNOLOGY;
typedef T_ACCESS_TECHNOLOGY T_AT;
typedef T_AT T_AT_ARRAY[5];
T_AT_ARRAY t_at_array;
When compiled with gcc 6.1.0 (gcc -g -c sample.c -o sample_gcc.o), the
generated DWARF looks as follows:
< 1><0x0000001d GOFF=0x0000001d> DW_TAG_typedef
DW_AT_name T_ACCESS_TECHNOLOGY
DW_AT_decl_file 0x00000001 /home/pkaletta/gcc_bug/sample.c
DW_AT_decl_line 0x00000001
DW_AT_type <0x00000028 GOFF=0x00000028>
< 1><0x00000028 GOFF=0x00000028> DW_TAG_base_type
DW_AT_byte_size 0x00000004
DW_AT_encoding DW_ATE_signed
DW_AT_name int
< 1><0x0000002f GOFF=0x0000002f> DW_TAG_typedef
DW_AT_name T_AT
DW_AT_decl_file 0x00000001 /home/pkaletta/gcc_bug/sample.c
DW_AT_decl_line 0x00000002
DW_AT_type <0x0000001d GOFF=0x0000001d>
< 1><0x0000003a GOFF=0x0000003a> DW_TAG_typedef
DW_AT_name T_AT_ARRAY
DW_AT_decl_file 0x00000001 /home/pkaletta/gcc_bug/sample.c
DW_AT_decl_line 0x00000003
DW_AT_type <0x00000045 GOFF=0x00000045>
< 1><0x00000045 GOFF=0x00000045> DW_TAG_array_type
DW_AT_type <0x0000002f GOFF=0x0000002f>
DW_AT_sibling <0x00000055 GOFF=0x00000055>
< 2><0x0000004e GOFF=0x0000004e> DW_TAG_subrange_type
DW_AT_type <0x00000055 GOFF=0x00000055>
DW_AT_upper_bound 4
< 1><0x00000055 GOFF=0x00000055> DW_TAG_base_type
DW_AT_byte_size 0x00000008
DW_AT_encoding DW_ATE_unsigned
DW_AT_name sizetype
< 1><0x0000005c GOFF=0x0000005c> DW_TAG_variable
DW_AT_name t_at_array
DW_AT_decl_file 0x00000001 /home/pkaletta/gcc_bug/sample.c
DW_AT_decl_line 0x00000004
DW_AT_type <0x0000003a GOFF=0x0000003a>
DW_AT_external yes(1)
DW_AT_location len 0x0009: 031000000000000000: DW_OP_addr
0x00000010
When compiled with g++ (g++ -g -c sample.c -o sample_g++.o):
< 1><0x0000001d GOFF=0x0000001d> DW_TAG_base_type
DW_AT_byte_size 0x00000004
DW_AT_encoding DW_ATE_signed
DW_AT_name int
< 1><0x00000024 GOFF=0x00000024> DW_TAG_typedef
DW_AT_name T_AT_ARRAY
DW_AT_decl_file 0x00000001 /home/pkaletta/gcc_bug/sample.c
DW_AT_decl_line 0x00000003
< 1><0x0000002b GOFF=0x0000002b> DW_TAG_base_type
DW_AT_byte_size 0x00000008
DW_AT_encoding DW_ATE_unsigned
DW_AT_name sizetype
< 1><0x00000032 GOFF=0x00000032> DW_TAG_variable
DW_AT_name t_at_array
DW_AT_decl_file 0x00000001 /home/pkaletta/gcc_bug/sample.c
DW_AT_decl_line 0x00000004
DW_AT_type <0x00000024 GOFF=0x00000024>
DW_AT_external yes(1)
DW_AT_location len 0x0009: 030000000000000000: DW_OP_addr
0x00000000
The debug info for C++ contains no trace of T_AT or
T_ACCESS_TECHNOLOGY. The typedef DIE generated for T_AT_ARRAY looks
bogus (typedef to void?). For earlier versions of g++ T_AT_ARRAY at
least shows up as an array of 5 ints, but that does not seem right
either.
In my opinion g++ (for C++) should behave just like gcc (for C) does,
and emit the entire chain of typedefs.
In my specific scenario, I would like to run some scripts on all
instances of T_ACCESS_TECHNOLOGY which is only possible if the type
information is preserved in the debug info.
Currently I can do this for C programs, but not for C++ programs.
-fno-eliminate-unused-debug-types doesn't help, as g++ will emit the
extra types, but fails to interconnect them.
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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/80595] [OOP] ICE using allocate with mold
Date: Tue, 02 May 2017 14:52:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |vehre at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Fixed in gcc 7.1.0 and trunk (8.0), likely revision r241439.
>From gcc-bugs-return-562270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 15:01:35 2017
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Subject: [Bug tree-optimization/79489] Strange static branch prediction for n != 0
Date: Tue, 02 May 2017 15:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79489
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue May 2 15:00:47 2017
New Revision: 247501
URL: https://gcc.gnu.org/viewcvs?rev=247501&root=gcc&view=rev
Log:
Remove LTO_STREAMER_DEBUG (PR lto/79489).
2017-05-02 Martin Liska <mliska@suse.cz>
PR lto/79489.
* lto-streamer-in.c (lto_read_tree_1): Remove
LTO_STREAMER_DEBUG.
* lto-streamer.c (struct tree_hash_entry): Likewise.
(struct tree_entry_hasher): Likewise.
(tree_entry_hasher::hash): Likewise.
(tree_entry_hasher::equal): Likewise.
(lto_streamer_init): Likewise.
(lto_orig_address_map): Likewise.
(lto_orig_address_get): Likewise.
(lto_orig_address_remove): Likewise.
* lto-streamer.h: Likewise.
* tree-streamer-in.c (streamer_alloc_tree): Likewise.
* tree-streamer-out.c (streamer_write_tree_header): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lto-streamer-in.c
trunk/gcc/lto-streamer.c
trunk/gcc/lto-streamer.h
trunk/gcc/tree-streamer-in.c
trunk/gcc/tree-streamer-out.c
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Subject: [Bug bootstrap/69506] [6 Regression] check-in 232454 seems to cause problems with cygwin builds
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--- Comment #9 from jyong at gcc dot gnu.org ---
Author: jyong
Date: Tue May 2 15:04:39 2017
New Revision: 247502
URL: https://gcc.gnu.org/viewcvs?rev=247502&root=gcc&view=rev
Log:
2017-05-02 Hugo Beauzée-Luyssen <hugo@beauzee.fr>
PR libstdc++/69506
* config/os/mingw32-w64/os_defines.h (_GLIBCXX_USE_WEAK_REF): Define.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/config/os/mingw32-w64/os_defines.h
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79489
--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #5)
> Author: marxin
> Date: Tue May 2 15:00:47 2017
> New Revision: 247501
>
> URL: https://gcc.gnu.org/viewcvs?rev=247501&root=gcc&view=rev
> Log:
> Remove LTO_STREAMER_DEBUG (PR lto/79489).
>
> 2017-05-02 Martin Liska <mliska@suse.cz>
>
> PR lto/79489.
> * lto-streamer-in.c (lto_read_tree_1): Remove
> LTO_STREAMER_DEBUG.
> * lto-streamer.c (struct tree_hash_entry): Likewise.
> (struct tree_entry_hasher): Likewise.
> (tree_entry_hasher::hash): Likewise.
> (tree_entry_hasher::equal): Likewise.
> (lto_streamer_init): Likewise.
> (lto_orig_address_map): Likewise.
> (lto_orig_address_get): Likewise.
> (lto_orig_address_remove): Likewise.
> * lto-streamer.h: Likewise.
> * tree-streamer-in.c (streamer_alloc_tree): Likewise.
> * tree-streamer-out.c (streamer_write_tree_header): Likewise.
>
> Modified:
> trunk/gcc/ChangeLog
> trunk/gcc/lto-streamer-in.c
> trunk/gcc/lto-streamer.c
> trunk/gcc/lto-streamer.h
> trunk/gcc/tree-streamer-in.c
> trunk/gcc/tree-streamer-out.c
Sorry, invalid reference.
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Subject: [Bug lto/77954] LTO_STREAMER_DEBUG ICE with OpenMP SIMD clones
Date: Tue, 02 May 2017 15:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77954
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue May 2 15:00:47 2017
New Revision: 247501
URL: https://gcc.gnu.org/viewcvs?rev=247501&root=gcc&view=rev
Log:
Remove LTO_STREAMER_DEBUG (PR lto/79489).
2017-05-02 Martin Liska <mliska@suse.cz>
PR lto/79489.
* lto-streamer-in.c (lto_read_tree_1): Remove
LTO_STREAMER_DEBUG.
* lto-streamer.c (struct tree_hash_entry): Likewise.
(struct tree_entry_hasher): Likewise.
(tree_entry_hasher::hash): Likewise.
(tree_entry_hasher::equal): Likewise.
(lto_streamer_init): Likewise.
(lto_orig_address_map): Likewise.
(lto_orig_address_get): Likewise.
(lto_orig_address_remove): Likewise.
* lto-streamer.h: Likewise.
* tree-streamer-in.c (streamer_alloc_tree): Likewise.
* tree-streamer-out.c (streamer_write_tree_header): Likewise.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lto-streamer-in.c
trunk/gcc/lto-streamer.c
trunk/gcc/lto-streamer.h
trunk/gcc/tree-streamer-in.c
trunk/gcc/tree-streamer-out.c
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Subject: [Bug lto/77954] LTO_STREAMER_DEBUG ICE with OpenMP SIMD clones
Date: Tue, 02 May 2017 15:12:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug c++/80559] Segmentation fault on invalid initialiser list template arguments
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I cannot reproduce.
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From: "matt at godbolt dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80559] Segmentation fault on invalid initialiser list template arguments
Date: Tue, 02 May 2017 15:51:00 -0000
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--- Comment #2 from Matt Godbolt <matt at godbolt dot org> ---
Thanks: it seems the command-line parameter `-std=c++1z` is needed to trigger
the segfault.
https://godbolt.org/g/6oDO6X
Apologies for not realising this in the initial report.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/80562] [7/8 Regression] ICE using if constexpr with nonconstant expression in function template
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-02
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |7.2
Summary|ICE using if constexpr with |[7/8 Regression] ICE using
|nonconstant expression in |if constexpr with
|function template |nonconstant expression in
| |function template
Ever confirmed|0 |1
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
commit df5390a9de5322cbaab3def921d3d517d4494144
Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed Aug 10 21:58:23 2016 +0000
Implement C++17 constexpr if.
* cp-tree.h (IF_STMT_CONSTEXPR_P): New.
* name-lookup.c (push_to_top_level, pop_from_top_level_1): Handle
it.
* parser.h (struct cp_parser): Add in_discarded_stmt field.
* parser.c (cp_parser_selection_statement): Handle 'if constexpr'.
(cp_parser_jump_statement): Avoid deducing from a discarded return.
* pt.c (tsubst_expr): Only instantiate taken branch of constexpr
if.
* semantics.c (begin_if_stmt): Set the binding level this_entity.
(finish_if_stmt_cond): Require the condition of a
constexpr if to be constant.
* decl.c (level_for_constexpr_if): New.
(named_label_entry): Add in_constexpr_if field.
(poplevel_named_label_1): Set it.
(check_goto): Check it.
(check_previous_goto_1): Check level_for_constexpr_if.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@239338
138bc75d-0d04-0410-961f-82ee72b054a4
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Subject: [Bug rtl-optimization/70902] GCC freezes while compiling for 'skylake-avx512' target
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|7.0 |7.2
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug target/68256] Defining TARGET_USE_CONSTANT_BLOCKS_P causes go bootstrap failure on aarch64.
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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 7.1 has been released.
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Subject: [Bug c++/71450] [5/6 Regression] ICE on invalid C++11 code on x86_64-linux-gnu: in tree check: expected record_type or union_type or qual_union_type, have template_type_parm in lookup_base, at cp/search.c:203
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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> ---
GCC 7.1 has been released.
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Subject: [Bug libfortran/79540] [7/8 Regression] FAIL: gfortran.dg/fmt_fw_d.f90 -O0 execution test
Date: Tue, 02 May 2017 15:56:00 -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 7.1 has been released.
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Subject: [Bug target/79793] Incorrect stack alignment for interrupt handler in 64-bit
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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 7.1 has been released.
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Subject: [Bug c++/80559] [7/8 Regression] Segmentation fault on invalid initialiser list template arguments
Date: Tue, 02 May 2017 15:56:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-05-02
Target Milestone|--- |7.2
Summary|Segmentation fault on |[7/8 Regression]
|invalid initialiser list |Segmentation fault on
|template arguments |invalid initialiser list
| |template arguments
Ever confirmed|0 |1
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Right, thanks, I can reproduce now.
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Subject: [Bug c++/80449] [7/8 Regression] ICE reporting failed partial class template specialization class template argument deduction
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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 7.1 has been released.
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Subject: [Bug target/78633] [7/8 Regression] [SH] libgcc/fp-bit.c:944:1: error: invalid rtl sharing found in the insn
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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 7.1 has been released.
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Subject: [Bug fortran/78009] [OOP] polymorphic component of derived type array slice handling error
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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 7.1 has been released.
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Subject: [Bug tree-optimization/79534] [7/8 Regression] tree-ifcombine aarch64 performance regression with trunk@245151
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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 7.1 has been released.
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Subject: [Bug tree-optimization/71625] missing strlen optimization on different array initialization style
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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 7.1 has been released.
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Subject: [Bug fortran/78557] [7/8 Regression] [OOP] ICE in trans-expr.c with -fcheck=mem
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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 7.1 has been released.
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Subject: [Bug c/79855] params.def: missing period in PARAM_MAX_STORES_TO_MERGE
Date: Tue, 02 May 2017 15:56:00 -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 7.1 has been released.
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Subject: [Bug libstdc++/70982] experimental/filesystem/iterators/directory_iterator.cc etc. FAIL with --enable-vtable-verify
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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 7.1 has been released.
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Subject: [Bug testsuite/78421] [7/8 Regression] vect-strided-a-u8-i2-gap.c fails on armeb
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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 7.1 has been released.
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Subject: [Bug libstdc++/77691] [7/8 regression] experimental/memory_resource/resource_adaptor.cc 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 7.1 has been released.
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Subject: [Bug c++/70277] Improve code generation for large initializer lists
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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 7.1 has been released.
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Subject: [Bug c++/79488] [7/8 Regression] ICE from lambda that has invalid return type
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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 7.1 has been released.
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Subject: [Bug fortran/56691] [OOP] Allocatable array: wrong offset when passing to CLASS dummy
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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 7.1 has been released.
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Subject: [Bug tree-optimization/79483] [7/8 Regression] [graphite] ICE: verify_ssa failed (error: definition in block 31 does not dominate use in block 28)
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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 7.1 has been released.
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Subject: [Bug target/79975] SEGV in cc1 compiling gcc.dg/rtl/x86_64/final.c
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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 7.1 has been released.
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Subject: [Bug target/68543] [AArch64] Implement overflow arithmetic standard names {u,}{add,sub,mul}v4<mode> and/or negv3<mode>
Date: Tue, 02 May 2017 15:57:00 -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 7.1 has been released.
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Subject: [Bug fortran/78238] [7/8 Regression] [OOP] ICE: verify_gimple failed, with -fdefault-integer-8
Date: Tue, 02 May 2017 15:57:00 -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 7.1 has been released.
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Subject: [Bug target/79451] [7/8 Regression] ICE in expand_expr_real_2, at expr.c:9021 w/ -O3 -floop-nest-optimize
Date: Tue, 02 May 2017 15:57:00 -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 7.1 has been released.
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Subject: [Bug tree-optimization/71751] [7/8 Regression] Segmentation fault in ssa_default_def
Date: Tue, 02 May 2017 15:57:00 -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 7.1 has been released.
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Subject: [Bug rtl-optimization/70681] [6/7/8 Regression] FAIL: gcc.dg/ira-shrinkwrap-prep-2.c gcc.dg/pr10474.c on arm and powerpc
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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 7.1 has been released.
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Subject: [Bug jit/66054] bootstrap comparison failure with --enable-host-shared
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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 7.1 has been released.
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Subject: [Bug c++/79590] ICE (internal compiler error) in nothrow_spec_p with generic lambda and `noexcept(noexcept(...))` expression
Date: Tue, 02 May 2017 15:57:00 -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 7.1 has been released.
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Subject: [Bug fortran/80120] [7/8 Regression] Incorrect error with associate construct and character array
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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 7.1 has been released.
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Subject: [Bug rtl-optimization/79901] ICE in prepare_cmp_insn, at optabs.c:3904
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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 7.1 has been released.
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Subject: [Bug c++/80465] [7/8 Regression] ICE when evaluating a lamba noexcept spec with captures in C++1z
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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 7.1 has been released.
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Subject: [Bug ada/79542] [7/8 regression] GNAT bug box
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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 7.1 has been released.
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Subject: [Bug rtl-optimization/60818] ICE in validate_condition_mode on powerpc*-linux-gnu*
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #26 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug tree-optimization/45397] [5/6 Regression] Issues with integer narrowing conversions
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #33 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug libstdc++/68210] nothrow operator fails to call default new
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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 7.1 has been released.
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Subject: [Bug rtl-optimization/78652] Add testcase for LRA generates wrong code by inheriting changed register
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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 7.1 has been released.
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Subject: [Bug rtl-optimization/71118] [5/6/7/8 Regression] ftois instruction not emitted for float -> int bitcast
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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 7.1 has been released.
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Subject: [Bug tree-optimization/79621] Missed path isolation opportunity
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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 7.1 has been released.
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Subject: [Bug tree-optimization/80213] [7/8 Regression] ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:704
Date: Tue, 02 May 2017 15:58:00 -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 7.1 has been released.
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Subject: [Bug target/79912] [7/8 regression] LRA unable to generate reloads after r245655
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug fortran/69834] [OOP] Collision in derived type hashes
Date: Tue, 02 May 2017 15:58:00 -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 7.1 has been released.
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Subject: [Bug rtl-optimization/79438] [7/8 Regression] ICE during RA w/ -O3 (or -Ofast) -funroll-loops for 32-bit BE powerpc target
Date: Tue, 02 May 2017 15:58:00 -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 7.1 has been released.
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Subject: [Bug go/78980] runtime/internal/atomic FAILs on 32-bit SPARC
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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 7.1 has been released.
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Subject: [Bug ada/79441] [7/8 regression] gnat.dg/pack9.adb fails
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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 7.1 has been released.
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Subject: [Bug target/79742] ARM sched pipeline selection problems
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug target/71555] ICE: compilation "never" finishes with -O -mtune=sandybridge -mavx512bw
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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 7.1 has been released.
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Subject: [Bug c/61240] [5/6/7/8 Regression] Incorrect warning "integer overflow in expression" on pointer-pointer subtraction
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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 7.1 has been released.
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Subject: [Bug libstdc++/70940] pmr::resource_adaptor requires optional allocator requirements and incorrectly aligns returned pointers.
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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 7.1 has been released.
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Subject: [Bug c/32643] [5/6/7/8 Regression] Wrong error message with unsigned char a = uchar&512
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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 7.1 has been released.
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Subject: [Bug fortran/70601] [5/6/7/8 Regression] [OOP] ICE on procedure pointer component call
Date: Tue, 02 May 2017 15:58:00 -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 7.1 has been released.
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Subject: [Bug libfortran/78314] [aarch64] ieee_support_halting does not report unsupported fpu traps correctly
Date: Tue, 02 May 2017 15:58:00 -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 7.1 has been released.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/79104] [DR 696] wrong semantics for odr-use of constant variable from lambda
Date: Tue, 02 May 2017 15:59:00 -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 7.1 has been released.
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/71935] [5/6/7/8 Regression] ICE is_c_interoperable(): gfc_simplify_expr failed
Date: Tue, 02 May 2017 15:59:00 -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 7.1 has been released.
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Subject: [Bug middle-end/78098] error: interrupt service routine can't be called directly
Date: Tue, 02 May 2017 15:59:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #17 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug target/80464] [7/8 regression] S/390: ICE failed to split vector move
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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 7.1 has been released.
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Subject: [Bug tree-optimization/71351] [7/8 Regression] ICE: Segmentation fault (graphite)
Date: Tue, 02 May 2017 15:59:00 -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 7.1 has been released.
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Subject: [Bug libgomp/70805] libgomp.c/for-5.c and libgomp.c++/for-13.C FAIL
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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 7.1 has been released.
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Subject: [Bug sanitizer/78267] libsanitizer breaks bootstrap on x86_64-apple-darwin16 at r241977
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #59 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug fortran/66366] [OOP] ICE on invalid with non-allocatable CLASS variable
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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 7.1 has been released.
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Subject: [Bug fortran/78983] [7/8 Regression] ICE with CAF-DT with allocatable member
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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 7.1 has been released.
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Subject: [Bug c++/71832] [7/8 Regression] ICE on invalid C++11 code with incorrect decltype use for non-type template parameter: Segmentation fault
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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 7.1 has been released.
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Subject: [Bug fortran/80260] [7/8 Regression] ICE with polymorphic array section actual argument
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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 7.1 has been released.
>From gcc-bugs-return-562342-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 16:00:56 2017
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Subject: [Bug middle-end/79989] [7/8 Regression][CHKP] ICE in assign_temp, at function.c:968
Date: Tue, 02 May 2017 15:59:00 -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 7.1 has been released.
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Subject: [Bug fortran/80291] [OOP] ICE in gfc_conv_expr_descriptor, at fortran/trans-array.c:6662
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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 7.1 has been released.
>From gcc-bugs-return-562354-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 16:02:02 2017
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Subject: [Bug middle-end/79988] [7/8 Regression][CHKP] ICE in tree check: accessed operand 5 of call_expr with 4 operands in ix86_expand_builtin, at config/i386/i386.c:36851
Date: Tue, 02 May 2017 15:59:00 -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 7.1 has been released.
>From gcc-bugs-return-562347-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 16:01:28 2017
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Subject: [Bug libstdc++/78939] [C++17] <tuple> interferes with structured binding from struct
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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 7.1 has been released.
>From gcc-bugs-return-562349-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 16:01:35 2017
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Subject: [Bug target/78459] [7/8 Regression] [SH] ICE in maybe_record_trace_start building glibc string tests
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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 7.1 has been released.
>From gcc-bugs-return-562340-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 16:00:45 2017
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Subject: [Bug fortran/77961] [Coarray] [OOP] Allocatable components in CLASS-typed coarrays unsupported.
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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 7.1 has been released.
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Subject: [Bug c/80468] [7 Regression] ICE on invalid AVX512 code with -m32
Date: Tue, 02 May 2017 15:59:00 -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 7.1 has been released.
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Subject: [Bug target/78460] [7/8 Regression] [SH] OOM building glibc string tst-cmp.c
Date: Tue, 02 May 2017 15:59:00 -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 7.1 has been released.
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Subject: [Bug c++/71169] [7/8 Regression] ICE on invalid C++ code in pop_nested_class (cp/class.c:7785)
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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 7.1 has been released.
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Subject: [Bug target/77346] [7/8 Regression] ICE in push_reload, at reload.c:1350
Date: Tue, 02 May 2017 15:59:00 -0000
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--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug c/69602] [6/7/8 Regression] over-ambitious logical-op warning on EAGAIN vs EWOULDBLOCK
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--- Comment #20 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug target/48863] A Bug When Assembler Instructions with C Expression Operands in arm-elf-gcc 4.5
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug c++/80559] [7/8 Regression] Segmentation fault on invalid initialiser list template arguments
Date: Tue, 02 May 2017 16:02:00 -0000
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
commit c2ab9194438e2805bdc12916ebf40890267d62f5
Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue Oct 4 20:42:58 2016 +0000
Implement P0091R2, Template argument deduction for class templates.
* parser.c (cp_parser_simple_type_specifier): Parse class placeholder.
Use the location of the beginning of the type-specifier.
(cp_parser_init_declarator): Parse deduction guide.
(cp_parser_diagnose_invalid_type_name): Mention class deduction.
(cp_parser_type_id_1): Don't accept class placeholder as template arg.
* cp-tree.h (CLASS_PLACEHOLDER_TEMPLATE): New.
* decl.c (grokdeclarator): Check for uninitialized auto here.
(start_decl_1): Not here.
(cp_finish_decl): Or here. Don't collapse a list when doing
class deduction.
(grokfndecl): Check deduction guide scope and body.
* error.c (dump_decl, dump_function_decl, dump_function_name):
Handle deduction guides.
* pt.c (make_template_placeholder, do_class_deduction): New.
(build_deduction_guide, rewrite_template_parm): New.
(dguide_name, dguide_name_p, deduction_guide_p): New.
(do_auto_deduction): Call do_class_deduction.
(splice_late_return_type, is_auto): Handle class placeholders.
(template_parms_level_to_args): Split from template_parms_to_args.
(tsubst_template_parms_level): Split from tsubst_template_parms.
* typeck2.c (build_functional_cast): Handle class placeholder.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@240756
138bc75d-0d04-0410-961f-82ee72b054a4
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Subject: [Bug middle-end/46555] [5/6/7/8 Regression] PHI RTL expansion leads to CSiBE regression
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug tree-optimization/62630] [5/6/7/8 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 #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug c++/78163] ref-qualified function type incorrectly accepted in function parameter type
Date: Tue, 02 May 2017 16:02:00 -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 7.1 has been released.
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Subject: [Bug fortran/80392] [5/6/7/8 Regression] [OOP] ICE with allocatable polymorphic function result in a procedure pointer component
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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 7.1 has been released.
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Subject: [Bug fortran/79929] [7/8 Regression] Bogus Warning: '__builtin_memset': specified size 4294967291 exceeds maximum object size 2147483647
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug tree-optimization/33562] [5/6 Regression] aggregate DSE disabled
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #33 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 7.1 has been released.
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Subject: [Bug fortran/78798] [cleanup] some int-valued functions should be bool
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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 7.1 has been released.
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From: "tschwinge at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/77954] LTO_STREAMER_DEBUG ICE with OpenMP SIMD clones
Date: Tue, 02 May 2017 16:14:00 -0000
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--- Comment #6 from Thomas Schwinge <tschwinge at gcc dot gnu.org> ---
(In reply to Martin Liška from comment #4)
> Remove LTO_STREAMER_DEBUG ([...]).
Thanks! I'm fine with that -- but you do have verified that it's really just
LTO_STREAMER_DEBUG that was broken, and not some lingering OMP/SIMD problem?
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Subject: [Bug c/80592] gcc fails to detect overflow in shift statement
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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> ---
clang can detect this but only if max_tu_symbol is made const:
l.c:9:21: warning: signed shift result (0x1F7FFF800000) requires 46 bits to
represent, but 'int' only
has 32 bits [-Wshift-overflow]
g(max_tu_symbol << 23);
~~~~~~~~~~~~~ ^ ~~
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Subject: [Bug ipa/80597] New: internal compiler error: in compute_inline_parameters, at ipa-inline-analysis.c:3126
Date: Tue, 02 May 2017 16:30:00 -0000
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Bug ID: 80597
Summary: internal compiler error: in compute_inline_parameters,
at ipa-inline-analysis.c:3126
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
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Reporter: babokin at gmail dot com
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Created attachment 41299
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41299&action=edit
reproducer
gcc top of the trunk, r247455, x86_64
Test is quite big, I failed to reduce it. UBSAN switch is also required to
reproduce.
> time g++ -std=c++11 -fsanitize=undefined -w -O0 -c func.i
func.cpp: In function ‘void foo()’:
func.cpp:1181:1: internal compiler error: in compute_inline_parameters, at
ipa-inline-analysis.c:3126
}
^
0xb96459 compute_inline_parameters(cgraph_node*, bool)
../../gcc_svn/gcc/ipa-inline-analysis.c:3125
0xb96668 compute_inline_parameters_for_current
../../gcc_svn/gcc/ipa-inline-analysis.c:3137
0xb96668 execute
../../gcc_svn/gcc/ipa-inline-analysis.c:3167
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
real 4m53.780s
user 4m49.790s
sys 0m3.985s
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Subject: [Bug c++/80561] Missed optimization: std::array data is aligned if array is aligned
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--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
Cool, that matches pretty much exactly the analysis I had posted on
stackoverflow ;-)
A separate issue from whether we can somehow propagate the alignment
information is what we do without the alignment information (remove the
attribute to be sure). Gcc generates a rather large code, with scalar and
vector loops, to try and reach an aligned position for one of the buffers (the
other one still requires potentially unaligned access) and perform at most 2
vector iterations. On the other hand, clang+llvm don't care about alignment and
generate unaligned vector operations, totally unrolled (that's 2 vector
iterations since there were 8 scalar iterations initially), for a grand total
of 6 insns (with AVX). I have a hard time believing that gcc's complicated code
is ever faster than clang's, whether the arrays are aligned or not. We can
discuss that in a separate PR if this one should center on alignment.
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Subject: [Bug target/79964] Cortex A53 codegen still not optimal
Date: Tue, 02 May 2017 17:51:00 -0000
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--- Comment #4 from PeteVine <tulipawn at gmail dot com> ---
> I'm not sure what you're trying to measure here - it's very confusing with multiple overlapping options (O3/Ofast/tree-vectorize), -mcpu/-march. Is it related to -fipa-pta or is that not relevant?
All the relevant flags have been kept constant (-Ofast -mcpu), so you should
only look at this result side by side with the previous one.
I'll summarise the findings for you:
To get the best c-ray performance out of gcc7 it's necessary to either use
-mcpu/mtune=cortex-a57 or -mcpu=cortex-a53 -frename-registers (depessimizing
with -mno-fix-cortex-a53-843419 if necessary)
However, in gcc8, neither produce the expected, best performance. No
combination does, a clear regression.
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Subject: [Bug fortran/56691] [OOP] Allocatable array: wrong offset when passing to CLASS dummy
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Subject: [Bug fortran/78009] [OOP] polymorphic component of derived type array slice handling error
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Subject: [Bug fortran/77961] [Coarray] [OOP] Allocatable components in CLASS-typed coarrays unsupported.
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Subject: [Bug fortran/66366] [OOP] ICE on invalid with non-allocatable CLASS variable
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Subject: [Bug fortran/80291] [OOP] ICE in gfc_conv_expr_descriptor, at fortran/trans-array.c:6662
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Subject: [Bug libstdc++/80538] Probably unwanted thread yield for thread::sleep_for with < 1s
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--- Comment #2 from zulliger at indel dot ch ---
Thank's for clarifying! If sleep(0)'s behaviour is undefined regarding 'thread
yielding', then my whole point is wrong.
(It seems I didn't read stackoverflow & Co carefully enough, as the statement I
saw was specific to Microsofts Sleep(int MilliSeconds) which indeed yields).
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Subject: [Bug ipa/80597] internal compiler error: in compute_inline_parameters, at ipa-inline-analysis.c:3126
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--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
The attached file demonstrates the problem and only needs flags
-v -w -O2.
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Subject: [Bug ipa/80597] internal compiler error: in compute_inline_parameters, at ipa-inline-analysis.c:3126
Date: Tue, 02 May 2017 19:49:00 -0000
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--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
Created attachment 41300
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41300&action=edit
gzipped C source code
>From gcc-bugs-return-562374-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 19:54:26 2017
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From: "glaubitz at physik dot fu-berlin.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/60818] ICE in validate_condition_mode on powerpc*-linux-gnu*
Date: Tue, 02 May 2017 19:54:00 -0000
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--- Comment #27 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> ---
(In reply to Jakub Jelinek from comment #26)
> GCC 7.1 has been released.
At least for me, the bug has been fixed with Segher's patch, so I'm not sure if
pushing the milestone to 7.2 makes sense.
>From gcc-bugs-return-562375-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 19:55:42 2017
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Subject: [Bug libstdc++/79349] unused std::string is not optimized away in presense of a call
Date: Tue, 02 May 2017 19:55:00 -0000
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AK <hiraditya at msn dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WORKSFORME
--- Comment #2 from AK <hiraditya at msn dot com> ---
The problem is exceptions. When I compile without exceptions (-fno-exceptions)
g++ does optimize this away and gives same output as clang. It seems clang++
compiles without exceptions by default and behaves like g++ when -fexceptions
is passed.
>From gcc-bugs-return-562376-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 20:10:17 2017
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Subject: [Bug libstdc++/79349] unused std::string is not optimized away in presense of a call
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AK <hiraditya at msn dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #3 from AK <hiraditya at msn dot com> ---
(In reply to AK from comment #2)
> The problem is exceptions. When I compile without exceptions
> (-fno-exceptions) g++ does optimize this away and gives same output as
> clang. It seems clang++ compiles without exceptions by default and behaves
> like g++ when -fexceptions is passed.
Correction:
For the example:
#include<string>
int main() {
std::string s("abc");
return 0;
}
clang (with libc++) optimizes away the std::string even in the presence of
exceptions (-fexceptions). When I compile without exceptions (-fno-exceptions)
g++ does optimize the std::string away.
However, when I introduce a call:
#include<string>
void foo();
int main() {
std::string s("abc");
foo();
return 0;
}
clang++ still optimizes the std::string but g++ does not. I think the problem
is with libstdc++ because when clang is using libstdc++ I can see the
destructor.
Sorry for the confusion.
>From gcc-bugs-return-562377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue May 02 20:14:05 2017
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Subject: Re: -Wformat-truncation outputs emtpy lines instead of source
To: Martin Sebor <msebor@gmail.com>
References: <62c01cc0-af7d-d75f-b81d-1892accb5e0e@web.de> <29446058-d3bb-3dbe-7b63-a48fca04d101@gmail.com>
Cc: gcc-bugs@gcc.gnu.org
From: Simon Sobisch <simonsobisch@web.de>
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I'm responding here as it was "opened" in this list directly.
You were right, adding -fno-diagnostics-color doesn't show anything
empty, changing it to -fdiagnostics-color bring the nice colors in - and
the spaces instead of the code (yes, I've copied it directly from the
terminal).
I'm on the following machine:
hostname = mymachine-trisquel
uname -m = x86_64
uname -r = 3.13.0-116-lowlatency
uname -s = Linux
uname -v = #163+7.0trisquel2 SMP PREEMPT Thu Apr 6 13:16:46 UTC 2017
I've just got the latest revision 247521 from branch-gcc-7 and did a
recompile (this time using the GCC 7 that was previously built) and the
issue stays.
I've just placed the output into a vim stdin pipe and can see the source
+ its control attributes:
make 2>&1 | vim - -R -c 'set filetype=nomodified nomodifiable nonu'
^[[01m^[[K../../../cobc/typeck.c:1064:2:^[[m^[[K ^[[01;36m^[[Knote:
^[[m^[[K'^[[01m^[[Ksnprintf^[[m^[[K' output between 17 and 63 bytes into
a destination of size 17
^[[01;36m^[[Ksnprintf (buff, (size_t)17,
"%02d/%02d/%02d%02d%c%02d%c%02d",^M^[[m^[[K
^[[01;36m^[[K^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^[[m^[[K
^[[01;36m^[[K current_compile_time.day_of_month,^M^[[m^[[K
^[[01;36m^[[K~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^[[m^[[K
^[[01;36m^[[K current_compile_time.month,^M^[[m^[[K
^[[01;36m^[[K~~~~~~~~~~~~~~~~~~~~~~~~~~~~^[[m^[[K
^[[01;36m^[[K current_compile_time.year % 100,^M^[[m^[[K
^[[01;36m^[[K~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^[[m^[[K
^[[01;36m^[[K current_compile_time.hour, '.',^M^[[m^[[K
^[[01;36m^[[K~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^[[m^[[K
^[[01;36m^[[K current_compile_time.minute, '.',^M^[[m^[[K
^[[01;36m^[[K~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^[[m^[[K
^[[01;36m^[[K current_compile_time.second)^[[m^[[K;^M
^[[01;36m^[[K~~~~~~~~~~~~~~~~~~~~~~~~~~~~^[[m^[[K
The main question is: is this a GCC problem or a Trisquel problem?
If it is the later is there any option for GCC to recognize this problem?
Simon
Am 02.05.2017 um 01:29 schrieb Martin Sebor:
> On 05/01/2017 01:39 PM, Simon Sobisch wrote:
>> Hi,
>>
>> I've just got GCC7 (build from svn worked like a charm, even if it
>> took hours but I was warned) and like the new warnings and hints very
>> much.
>>
>> When compiling GnuCOBOL from vcs (sources on mount, therefore the long
>> path) I got one warning with multiple and very long tilde lines.
>>
>> /media/sf_Entwicklung/GnuCOBOL/gnu-cobol-2.0_texi/cobc/typeck.c: In
>> function 'cb_build_registers':
>> /media/sf_Entwicklung/GnuCOBOL/gnu-cobol-2.0_texi/cobc/typeck.c:1064:30:
>> warning: 'snprintf' output may be truncated before the last format
>> character [-Wformat-truncation=]
>> snprintf (buff, (size_t)17, "%02d/%02d/%02d%02d%c%02d%c%02d",
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> /media/sf_Entwicklung/GnuCOBOL/gnu-cobol-2.0_texi/cobc/typeck.c:1064:2: note:
>> 'snprintf' output between 17 and 63 bytes into a destination of size 17
>>
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> current_compile_time.second);
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>
>> It looks like the source in the lines between are missing (the number
>> of tildes is correct).
>> The source reads:
>>
>> snprintf (buff, (size_t)17, "%02d/%02d/%02d%02d%c%02d%c%02d",
>> current_compile_time.day_of_month,
>> current_compile_time.month,
>> current_compile_time.year % 100,
>> current_compile_time.hour, '.',
>> current_compile_time.minute, '.',
>> current_compile_time.second);
>
> Hmm, that's quite odd. I'm not able to reproduce this "effect"
> and I have never seen anything like it. My first thought was
> that it could be a problem with the terminal you are using (try
> compiling with -fno-diagnostics-color to see if it improves)
> but since you presumably copied the error message above from
> the terminal that's probably not going to help. If it doesn't,
> can you please create a new bug and attach to it a preprocessing
> translation unit (compile the source file with -E and save the
> output)? Also include the full set of command line options you
> invoked the compiler with when you got the "invisible" message.
>
> [...}
>
> Martin
^ permalink raw reply [flat|nested] 5+ messages in thread