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* [Bug libstdc++/86861] 18_support/new_aligned.cc FAILs
[not found] <bug-86861-4@http.gcc.gnu.org/bugzilla/>
@ 2018-08-06 12:51 ` redi at gcc dot gnu.org
0 siblings, 0 replies; only message in thread
From: redi at gcc dot gnu.org @ 2018-08-06 12:51 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86861
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-06
Ever confirmed|0 |1
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Rainer Orth from comment #0)
> Thew new 18_support/new_aligned.cc test FAILs on Solaris 10 (sparc and x86),
> which lacks aligned_alloc in libc:
Ah good, I thought that testcase might shake out some more Solaris bugs :-)
Which implementation in libsupc++/new_opa.cc gets used? Is posix_memalign
available? Or memalign?
I'm guessing it uses memalign, and Solaris memalign has an additional
requirement that posix_memalign has, but GNU memalign doesn't:
The value of alignment must be a power of two and must be greater than or
equal to the size of a word.
So maybe this will fix it:
--- a/libstdc++-v3/libsupc++/new_opa.cc
+++ b/libstdc++-v3/libsupc++/new_opa.cc
@@ -53,7 +53,14 @@ aligned_alloc (std::size_t al, std::size_t sz)
#else
extern "C" void *memalign(std::size_t boundary, std::size_t size);
#endif
-#define aligned_alloc memalign
+static inline void*
+aligned_alloc (std::size_t al, std::size_t sz)
+{
+ // Solaris requires that sz is greater than or equal to sizeof(int)
+ if (al < sizeof(int))
+ al = sizeof(int);
+ return memalign (al, sz);
+}
#else
#include <stdint.h>
// The C library doesn't provide any aligned allocation functions, define one.
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From: "konovalov.alv at ya dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86866] New: MMX intrinsics / x87 registers aliasing
Date: Mon, 06 Aug 2018 13:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86866
Bug ID: 86866
Summary: MMX intrinsics / x87 registers aliasing
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: konovalov.alv at ya dot ru
Target Milestone: ---
Each 64-bit MMX register corresponds to the mantissa part of an 80-bit x87
register. But the GCC considers the MMX and X87 registers independent.
For example:
#include <mmintrin.h>
#include <stdio.h>
int main()
{
float x = 3.14;
__m64 y = _mm_or_si64(_m_from_int(1), _m_from_int(2));
(void)y;
printf("%f\n", x);
}
If I build this code using 387 floating-point coprocessor, program prints wrong
result:
bash-4.2$ gcc -mfpmath=387 -O0 -g3 test2.c -o test
bash-4.2$ ./test
-nan
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86866] MMX intrinsics / x87 registers aliasing
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86866
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |target
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think you forgot to the flush as required. The mmx programming model
requires the user to do it.
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From: "konovalov.alv at ya dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86866] MMX intrinsics / x87 registers aliasing
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86866
--- Comment #2 from Aleksey Konovalov <konovalov.alv at ya dot ru> ---
(In reply to Andrew Pinski from comment #1)
> I think you forgot to the flush as required. The mmx programming model
> requires the user to do it.
You are right. Calling _m_empty() solves problem
Thank you
>From gcc-bugs-return-612203-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 13:32:18 2018
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Subject: [Bug target/86866] MMX intrinsics / x87 registers aliasing
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86866
Aleksey Konovalov <konovalov.alv at ya dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WORKSFORME
--- Comment #3 from Aleksey Konovalov <konovalov.alv at ya dot ru> ---
Calling _m_empty () solved the problem
>From gcc-bugs-return-612204-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 14:18:26 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug web/86867] New: New bugzilla comment tag to mark comments as obsolete or irrelevant
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86867
Bug ID: 86867
Summary: New bugzilla comment tag to mark comments as obsolete
or irrelevant
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: web
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
Marking a comment with the "spam" tag causes it to be hidden by default (and
locks the comment author's account).
It might be useful to have the hiding behaviour (but not locking the account)
for other reasons. Sometimes a comment is no longer relevant and could be
marked obsolete (like attachments can be). More commonly, a comment is simply
added to the wrong bug (often followed by a "sorry, please ignore" comment).
We could either have separate "obsolete" and "offtopic" tags, or maybe just
"hidden" which can serve both purposes.
Ideally any comment author would be able to tag their own comments, but it
would also be OK if only @gcc.gnu.org accounts can add the tags.
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Subject: [Bug web/86867] New bugzilla comment tag to mark comments as obsolete or irrelevant
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I haven't CC'd Frédéric yet, let's decide if we really want this or not first.
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Subject: [Bug lto/48200] Implement function attribute for symbol versioning (.symver)
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Zack Weinberg <zackw at panix dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zackw at panix dot com
--- Comment #26 from Zack Weinberg <zackw at panix dot com> ---
/subscribe
I've tripped over this problem myself in the context of the new
password-hashing library, libxcrypt (see
https://github.com/besser82/libxcrypt/issues/24 ) Our symbol-versioning
techniques are lifted from glibc (see
https://github.com/besser82/libxcrypt/blob/aae4c1baea534d2e4c9dfe2faf42ee0c5f7a6f22/crypt-port.h#L122
). Function attributes seem like a good replacement to me, although I'd ask
that people think about how a library author might write macros that will
seamlessly fall back to the older technique.
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Subject: [Bug target/86807] spu port needs updating for CVE-2017-5753
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--- Comment #1 from Ulrich Weigand <uweigand at gcc dot gnu.org> ---
Author: uweigand
Date: Mon Aug 6 14:40:56 2018
New Revision: 263335
URL: https://gcc.gnu.org/viewcvs?rev=263335&root=gcc&view=rev
Log:
[spu, commit] Define TARGET_HAVE_SPECULATION_SAFE_VALUE
The SPU processor is not affected by speculation, so this macro can
safely be defined as speculation_safe_value_not_needed.
gcc/ChangeLog:
PR target/86807
* config/spu/spu.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
Define to speculation_safe_value_not_needed.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/spu/spu.c
>From gcc-bugs-return-612208-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 14:43:06 2018
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Subject: [Bug target/86807] spu port needs updating for CVE-2017-5753
Date: Mon, 06 Aug 2018 14:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86807
Ulrich Weigand <uweigand at gcc dot gnu.org> changed:
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--- Comment #2 from Ulrich Weigand <uweigand at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-612209-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 14:43:07 2018
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Subject: [Bug target/86772] [meta-bug] tracking port status for CVE-2017-5753
Date: Mon, 06 Aug 2018 14:43:00 -0000
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Bug 86772 depends on bug 86807, which changed state.
Bug 86807 Summary: spu port needs updating for CVE-2017-5753
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86807
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>From gcc-bugs-return-612210-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 15:16:53 2018
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Segher Boessenkool <segher at gcc dot gnu.org> changed:
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CC| |segher at gcc dot gnu.org
--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
This is a text comment.
>From gcc-bugs-return-612211-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 15:17:39 2018
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Subject: [Bug web/86867] New bugzilla comment tag to mark comments as obsolete or irrelevant
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--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I meant *test* comment. Doh.
>From gcc-bugs-return-612212-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 15:18:26 2018
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Subject: [Bug web/86867] New bugzilla comment tag to mark comments as obsolete or irrelevant
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I tagged #c2 as obsolete, and it is hidden, so this already works. Yay!
>From gcc-bugs-return-612214-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 15:20:56 2018
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Subject: [Bug web/86867] New bugzilla comment tag to mark comments as obsolete or irrelevant
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--- Comment #6 from Segher Boessenkool <segher at gcc dot gnu.org> ---
So "obsolete" works, and "offtopic" doesn't.
>From gcc-bugs-return-612213-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 15:20:14 2018
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Subject: [Bug web/86867] New bugzilla comment tag to mark comments as obsolete or irrelevant
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oh good! Closing this then.
>From gcc-bugs-return-612215-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 15:37:17 2018
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86868] New: cc1: warning: stack probing requires '-maccumulate-outgoing-args' for correctness
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86868
Bug ID: 86868
Summary: cc1: warning: stack probing requires
'-maccumulate-outgoing-args' for correctness
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: ubizjak at gmail dot com
Target Milestone: ---
Target: i386,x86-64
[hjl@gnu-cfl-1 gcc]$ cat /tmp/x.i
extern void foo (void);
void
bar (void)
{
foo ();
}
[hjl@gnu-cfl-1 gcc]$ ./xgcc -B./ -mno-accumulate-outgoing-args -S /tmp/x.i
[hjl@gnu-cfl-1 gcc]$ ./xgcc -B./ -mno-accumulate-outgoing-args -S /tmp/x.i
-mstack-arg-probe
cc1: warning: stack probing requires ‘-maccumulate-outgoing-args’ for
correctness
[hjl@gnu-cfl-1 gcc]$
But there is
#define ACCUMULATE_OUTGOING_ARGS \
((TARGET_ACCUMULATE_OUTGOING_ARGS \
&& optimize_function_for_speed_p (cfun)) \
|| (cfun->machine->func_type != TYPE_NORMAL \
&& crtl->stack_realign_needed) \
|| TARGET_STACK_PROBE \
|| TARGET_64BIT_MS_ABI \
|| (TARGET_MACHO && crtl->profile))
-mno-accumulate-outgoing-args is a best effort option. GCC generates the
same code when
/* If stack probes are required, the space used for large function
arguments on the stack must also be probed, so enable
-maccumulate-outgoing-args so this happens in the prologue. */
if (TARGET_STACK_PROBE_P (opts->x_target_flags)
&& !(opts->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS))
{
if (opts_set->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS)
warning (0,
main_args_p
? G_("stack probing requires %<-maccumulate-outgoing-args%> "
"for correctness")
: G_("stack probing requires "
"%<target(\"accumulate-outgoing-args\")%> for "
"correctness"));
opts->x_target_flags |= MASK_ACCUMULATE_OUTGOING_ARGS;
}
is removed.
>From gcc-bugs-return-612216-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 15:43:05 2018
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Subject: [Bug testsuite/86153] [8/9 regression] test case g++.dg/pr83239.C fails starting with r261585
Date: Mon, 06 Aug 2018 15:43:00 -0000
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--- Comment #11 from seurer at gcc dot gnu.org ---
<previous run
>this run
> FAIL: g++.dg/pr83239.C -std=gnu++98 (test for excess errors)
< FAIL: g++.dg/pr83239.C -std=gnu++11 scan-tree-dump-not optimized
"_ZNSt6vectorIiSaIiEE17_M_default_appendEm"
< FAIL: g++.dg/pr83239.C -std=gnu++14 scan-tree-dump-not optimized
"_ZNSt6vectorIiSaIiEE17_M_default_appendEm"
the patch fixed the original failures but now there's a new one
spawn -ignore SIGHUP
/home/seurer/gcc/build/gcc-trunk/gcc/testsuite/g++3/../../xg++
-B/home/seurer/gcc/build/gcc-trunk/gcc/testsuite/g++3/../../
/home/seurer/gcc/gcc-trunk/gcc/testsuite/g++.dg/pr83239.C
-fno-diagnostics-show-caret -fdiagnostics-color=never -nostdinc++
-I/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/powerpc64le-unknown-linux-gnu
-I/home/seurer/gcc/build/gcc-trunk/powerpc64le-unknown-linux-gnu/libstdc++-v3/include
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/libsupc++
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/include/backward
-I/home/seurer/gcc/gcc-trunk/libstdc++-v3/testsuite/util -fmessage-length=0
-std=gnu++98 -O3 -finline-limit=500 -Wall -fdump-tree-optimized -S -o pr83239.s
In function 'void test_loop() [with T = int]':
cc1plus: warning: 'void* __builtin_memset(void*, int, long unsigned int)'
specified size 18446744073709551608 exceeds maximum object size
9223372036854775807 [-Wstringop-overflow=]
In function 'void test_if(std::vector<T>&, int) [with T = long int]':
cc1plus: warning: 'void* __builtin_memset(void*, int, long unsigned int)'
specified size 18446744073709551600 exceeds maximum object size
9223372036854775807 [-Wstringop-overflow=]
FAIL: g++.dg/pr83239.C -std=gnu++98 (test for excess errors)
Excess errors:
cc1plus: warning: 'void* __builtin_memset(void*, int, long unsigned int)'
specified size 18446744073709551608 exceeds maximum object size
9223372036854775807 [-Wstringop-overflow=]
cc1plus: warning: 'void* __builtin_memset(void*, int, long unsigned int)'
specified size 18446744073709551600 exceeds maximum object size
9223372036854775807 [-Wstringop-overflow=]
PASS: g++.dg/pr83239.C -std=gnu++98 scan-tree-dump-not optimized
"_ZNSt6vectorIiSaIiEE17_M_default_appendEm"
PASS: g++.dg/pr83239.C -std=gnu++98 scan-tree-dump-not optimized
"_ZNSt6vectorIPvSaIS0_EE17_M_default_appendEm"
>From gcc-bugs-return-612217-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 16:16:50 2018
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From: "saaadhu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86869] New: ICE when taking address of array member of __memx struct pointer
Date: Mon, 06 Aug 2018 16:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86869
Bug ID: 86869
Summary: ICE when taking address of array member of __memx
struct pointer
Product: gcc
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The following code
struct S {
char y[2];
};
void foo(const __memx struct S *s) {
const char (*p)[2] = &s->y;
}
causes an ICE when compiled with the below flags on avr-gcc 9.0.0 20180805
(reproducible on 5.4 as well) causes an ICE
$ avr-gcc -O0 -mmcu=avr51 test.c
during RTL pass: expand
In function 'foo':
6 : internal compiler error: in convert_memory_address_addr_space_1, at
explow.c:300
const char (*p)[2] = &s->y;
^
0x5bd7ca convert_memory_address_addr_space_1(scalar_int_mode, rtx_def*,
unsigned char, bool, bool)
../../gcc-src/gcc/explow.c:300
0x939605 convert_memory_address_addr_space_1(scalar_int_mode, rtx_def*,
unsigned char, bool, bool)
../../gcc-src/gcc/explow.c:401
0x939605 convert_memory_address_addr_space(scalar_int_mode, rtx_def*, unsigned
char)
../../gcc-src/gcc/explow.c:402
0x94fdd9 expand_expr_addr_expr
../../gcc-src/gcc/expr.c:8028
0x94fdd9 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc-src/gcc/expr.c:11142
0x95b727 store_expr(tree_node*, rtx_def*, int, bool, bool)
../../gcc-src/gcc/expr.c:5614
0x95c8c0 expand_assignment(tree_node*, tree_node*, bool)
../../gcc-src/gcc/expr.c:5398
0x849837 expand_gimple_stmt_1
../../gcc-src/gcc/cfgexpand.c:3636
0x84a728 expand_gimple_stmt
../../gcc-src/gcc/cfgexpand.c:3734
0x84b0ff expand_gimple_basic_block
../../gcc-src/gcc/cfgexpand.c:5769
0x84fec7 execute
../../gcc-src/gcc/cfgexpand.c:6372
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler exited with result code 1
>From gcc-bugs-return-612218-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 16:46:50 2018
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Subject: [Bug c++/86767] [6/7/8/9 Regression] continue statements in constexpr functions causes unbounded looping
Date: Mon, 06 Aug 2018 16:46:00 -0000
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--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Mon Aug 6 16:46:13 2018
New Revision: 263340
URL: https://gcc.gnu.org/viewcvs?rev=263340&root=gcc&view=rev
Log:
PR c++/86767
* constexpr.c (cxx_eval_statement_list): Handle continue.
* g++.dg/cpp1y/constexpr-86767.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/constexpr-86767.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/constexpr.c
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-612219-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 16:47:29 2018
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Subject: [Bug c++/86767] [6/7/8 Regression] continue statements in constexpr functions causes unbounded looping
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7/8/9 Regression] |[6/7/8 Regression] continue
|continue statements in |statements in constexpr
|constexpr functions causes |functions causes unbounded
|unbounded looping |looping
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed on trunk so far.
>From gcc-bugs-return-612220-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 17:26:53 2018
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Subject: [Bug other/86857] configure sprintf with target-specific details
Date: Mon, 06 Aug 2018 17:26:00 -0000
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--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
A configure test can only test what sprintf does for the host, not for the
target, so this would always need to be a target hook.
Even with a hook, it would not surprise me if e.g. results on MinGW depend
on __USE_MINGW_ANSI_STDIO, so you can't assume there is always a constant
answer for these questions.
>From gcc-bugs-return-612221-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 17:39:30 2018
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Subject: [Bug c++/86870] New: Declaration disambiguation is too greedy
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Bug ID: 86870
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struct X {
void operator=(int);
} x;
int main() {
1 + 1, X(x) = 4; // ok
X(x) = 4, 1 + 1; // gcc fails
}
gcc cannot compile the second statement, because it thinks it is a declaration,
even though it is not. EDG compiles this just fine (clang and MSVC do not).
>From gcc-bugs-return-612222-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 17:43:17 2018
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Subject: [Bug c++/86763] [7/8 Regression] Wrong code comparing member of copy of a 237 byte object with nontrivial default constructor on x86-64 arch
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--- Comment #12 from Paul Brannan <curlypaul924 at gmail dot com> ---
(In reply to Richard Biener from comment #9)
> The following seems to work, will test.
>
> Index: gcc/cp/class.c
> ===================================================================
> --- gcc/cp/class.c (revision 263209)
> +++ gcc/cp/class.c (working copy)
> @@ -6243,6 +6243,7 @@ layout_class_type (tree t, tree *virtual
> bitsize_int (BITS_PER_UNIT)));
> SET_TYPE_ALIGN (base_t, rli->record_align);
> TYPE_USER_ALIGN (base_t) = TYPE_USER_ALIGN (t);
> + TYPE_TYPELESS_STORAGE (base_t) = TYPE_TYPELESS_STORAGE (t);
>
> /* Copy the non-static data members of T. This will include its
> direct non-virtual bases & vtable. */
This patch fixes the failure in my original (non-reduced test case).
>From gcc-bugs-return-612223-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 18:38:13 2018
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Subject: [Bug c++/86849] g++ applies guaranteed copy elision to delegating construction, resulting in miscompiles
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--- Comment #1 from Richard Smith <richard-gccbugzilla at metafoo dot co.uk> ---
Interestingly, GCC does appear to suppress guaranteed copy elision if the class
has virtual base classes.
Perhaps GCC's approach to this problem is to assume that a function returning a
T by value cannot touch the tail padding of the T object if T is POD for the
purpose of layout, and so the tail padding cannot be modified in the case where
it's reusable by the enclosing object? (So we only have a problem in the case
where a complete-object constructor and a base-subobject constructor would do
different things, namely when the class has virtual base classes.)
The trouble with that approach is that other compilers do store to the tail
padding of T in a function returning T by value:
https://godbolt.org/g/MM7Wvb
... and indeed the standard requires this behavior:
http://eel.is/c++draft/dcl.init#6.2
"To zero-initialize an object or reference of type T means [...] if T is a
(possibly cv-qualified) non-union class type, its padding bits (6.7) are
initialized to zero bits [...]"
(so arguably that's another bug in GCC's behavior: it should zero-initialize
A's tail padding in the new example, but does not).
>From gcc-bugs-return-612224-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 18:43:43 2018
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86849] g++ applies guaranteed copy elision to delegating construction, resulting in miscompiles
Date: Mon, 06 Aug 2018 18:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86849
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Richard Smith from comment #1)
> Interestingly, GCC does appear to suppress guaranteed copy elision if the
> class has virtual base classes.
>
>
> Perhaps GCC's approach to this problem is to assume that a function
> returning a T by value cannot touch the tail padding of the T object if T is
> POD for the purpose of layout, and so the tail padding cannot be modified in
> the case where it's reusable by the enclosing object? (So we only have a
> problem in the case where a complete-object constructor and a base-subobject
> constructor would do different things, namely when the class has virtual
> base classes.)
>
> The trouble with that approach is that other compilers do store to the tail
> padding of T in a function returning T by value:
>
> https://godbolt.org/g/MM7Wvb
>
> ... and indeed the standard requires this behavior:
>
> http://eel.is/c++draft/dcl.init#6.2
>
> "To zero-initialize an object or reference of type T means [...] if T is a
> (possibly cv-qualified) non-union class type, its padding bits (6.7) are
> initialized to zero bits [...]"
>
> (so arguably that's another bug in GCC's behavior: it should zero-initialize
> A's tail padding in the new example, but does not).
I wonder if that's PR85548.
>From gcc-bugs-return-612225-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 20:41:23 2018
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Subject: [Bug c++/86871] New: ICE: gimple check: expected gimple_assign(error_mark), have gimple_call(trunc_mod_expr) in gimple_assign_lhs, at gimple.h:2462
Date: Mon, 06 Aug 2018 20:41:00 -0000
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Bug ID: 86871
Summary: ICE: gimple check: expected gimple_assign(error_mark),
have gimple_call(trunc_mod_expr) in gimple_assign_lhs,
at gimple.h:2462
Product: gcc
Version: 9.0
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Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at inbox dot ru
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Created attachment 44511
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44511&action=edit
a.cc
Original bug report where g++ crashes when compiling opencv-3.4.1:
https://bugs.gentoo.org/657060
Also reproducible on gcc-master:
$ ./gcc/xg++ -B ./gcc -c /tmp/a.cc -O2 -march=bdver4 -ftree-vectorize
during GIMPLE pass: vect
/tmp/a.cc: In function 'void fn1()':
/tmp/a.cc:34:6: internal compiler error: gimple check: expected
gimple_assign(error_mark), have gimple_call(trunc_mod_expr) in
gimple_assign_lhs, at gimple.h:2462
void fn1() {
^~~
0x7f822fff979a __libc_start_main
../csu/libc-start.c:308
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ ./gcc/xg++ -v
Using built-in specs.
COLLECT_GCC=./gcc/xg++
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --enable-languages=c,c++ --disable-bootstrap
--with-multilib-list=m64
--prefix=/home/slyfox/dev/git/gcc-x86_64/../gcc-native-quick-installed
--disable-nls CFLAGS='-O0 ' CXXFLAGS='-O0 '
--with-sysroot=/usr/x86_64-HEAD-linux-gnu
Thread model: posix
gcc version 9.0.0 20180806 (experimental) (GCC)
>From gcc-bugs-return-612226-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 21:11:18 2018
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From: "tadeus.prastowo at unitn dot it" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/57891] No diagnostic of narrowing conversion in non-type template argument
Date: Mon, 06 Aug 2018 21:11:00 -0000
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--- Comment #9 from Tadeus Prastowo <tadeus.prastowo at unitn dot it> ---
This problem still exists in the trunk (cf. https://godbolt.org/g/bRf18i).
Clang correctly keeps rejecting it (cf. https://godbolt.org/g/egcNtV). Both
use the following MWE:
template<unsigned a>
struct X {
static constexpr unsigned data {a};
};
int main() {
return X<-1>::data;
}
>From gcc-bugs-return-612227-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 21:16:14 2018
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Subject: [Bug c++/57891] No diagnostic of narrowing conversion in non-type template argument
Date: Mon, 06 Aug 2018 21:16:00 -0000
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--- Comment #10 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Right, we're still hashing this out on the mailing list. But I expect it to be
fixed soon.
There are similar cases not handled by my current patch, but I'll work on those
next.
>From gcc-bugs-return-612228-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 21:25:45 2018
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Subject: [Bug c++/85747] suboptimal code without constexpr
Date: Mon, 06 Aug 2018 21:25:00 -0000
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Alexander Zaitsev <zamazan4ik at tut dot by> changed:
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----------------------------------------------------------------------------
CC| |zamazan4ik at tut dot by
--- Comment #8 from Alexander Zaitsev <zamazan4ik at tut dot by> ---
(In reply to Marc Glisse from comment #5)
> (In reply to Antony Polukhin from comment #4)
> > Does providing some kind of -Oon-the-fly switch solves the issue with JIT
> > compile times while still allows more optimizations for the traditional non
> > JIT -O2 builds?
>
> Not sure what you mean by -Oon-the-fly. If you want to JIT compile the code,
> you more or less need to embed a compiler in the executable...
>
> The closest I can think of is -fprofile-values. It is possible to collect
> the values of constants during a training run and use them during a second
> compilation. But then knowing more constants in one compilation than the
> other may change the code in ways that the PGO framework will not like.
As I understand Anthony meant here some compiler option which allows to
compiler some "aggresive" mode for detecting code which can be calculated at
compile-time as much as possible, even if it will increase significantly
compilation time. Of course this flag must be disabled by default even with -O3
>From gcc-bugs-return-612229-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 21:46:49 2018
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86861] 18_support/new_aligned.cc FAILs
Date: Mon, 06 Aug 2018 21:46:00 -0000
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--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> (In reply to Rainer Orth from comment #0)
>> Thew new 18_support/new_aligned.cc test FAILs on Solaris 10 (sparc and x86),
>> which lacks aligned_alloc in libc:
>
> Ah good, I thought that testcase might shake out some more Solaris bugs :-)
>
> Which implementation in libsupc++/new_opa.cc gets used? Is posix_memalign
> available? Or memalign?
It's memalign indeed. posix_memalign and aligned_alloc were introduced
at different points in the Solaris 11 release series.
> I'm guessing it uses memalign, and Solaris memalign has an additional
> requirement that posix_memalign has, but GNU memalign doesn't:
>
> The value of alignment must be a power of two and must be greater than or
> equal to the size of a word.
Indeed: this goes back as far as Solaris 2.5.1 and still exists in 11.5.
> So maybe this will fix it:
[...]
It did indeed: bootstrapped on i386-pc-solaris2.10 where
-FAIL: 18_support/new_aligned.cc execution test
-FAIL: 20_util/memory_resource/2.cc execution test
are now gone and i386-pc-solaris2.11 (unchanged).
Thanks.
Rainer
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From: "danglin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86807] spu port needs updating for CVE-2017-5753
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--- Comment #3 from John David Anglin <danglin at gcc dot gnu.org> ---
Author: danglin
Date: Mon Aug 6 21:47:54 2018
New Revision: 263344
URL: https://gcc.gnu.org/viewcvs?rev=263344&root=gcc&view=rev
Log:
PR target/86807
* config/pa/pa.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
Define to speculation_safe_value_not_needed.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/pa/pa.c
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Subject: [Bug libstdc++/86861] 18_support/new_aligned.cc FAILs
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Great, thanks for testing it. Is it fixed for 64-bit as well as 32-bit? I was
concerned that "the size of a word" might actually be imprecise and should be
sizeof(void*) not sizeof(int).
I'll commit a slightly improved patch tomorrow.
>From gcc-bugs-return-612232-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 21:50:42 2018
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Subject: [Bug c++/86871] ICE: gimple check: expected gimple_assign(error_mark), have gimple_call(trunc_mod_expr) in gimple_assign_lhs, at gimple.h:2462
Date: Mon, 06 Aug 2018 21:50:00 -0000
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--- Comment #1 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Managed to get rid of templates. Looks like use of uninitialized 'i' is somehow
the culprit:
int *f;
struct g {
g() {
f = new int;
aj = f;
}
int &operator[](int h) { return *(aj + h); }
int *aj;
};
void j() {
g b;
g c;
for (int i; i; i++) {
int d = 0;
for (int e = -1; e <= 1; e++) {
int a = i + e;
if (a)
d = b[a];
}
c[i] = d;
}
}
>From gcc-bugs-return-612233-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 21:52:08 2018
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Subject: [Bug c++/86871] ICE: gimple check: expected gimple_assign(error_mark), have gimple_call(trunc_mod_expr) in gimple_assign_lhs, at gimple.h:2462
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Sergei Trofimovich <slyfox at inbox dot ru> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #44511|0 |1
is obsolete| |
--- Comment #2 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Created attachment 44512
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44512&action=edit
a.cc
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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86861] 18_support/new_aligned.cc FAILs
Date: Mon, 06 Aug 2018 22:10:00 -0000
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--- Comment #4 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> ---
> --- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> Great, thanks for testing it. Is it fixed for 64-bit as well as 32-bit? I was
> concerned that "the size of a word" might actually be imprecise and should be
> sizeof(void*) not sizeof(int).
It is. In fact, I found the following comment in the OpenSolaris
sources of memalign.c, still in Illumos:
https://github.com/illumos/illumos-gate/blob/master/usr/src/lib/libc/port/gen/memalign.c#L35
#define _misaligned(p) ((unsigned)(p) & 3)
/* 4-byte "word" alignment is considered ok in LP64 */
>From gcc-bugs-return-612235-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 22:29:20 2018
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/86872] New: [9 Regression] LTO bootstrap failed with profiledbootstrap
Date: Mon, 06 Aug 2018 22:29:00 -0000
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Bug ID: 86872
Summary: [9 Regression] LTO bootstrap failed with
profiledbootstrap
Product: gcc
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Target Milestone: ---
On x86-64, r263300 gave
In function ‘gimple_simplify_32’:
lto1: internal compiler error: in linemap_check_ordinary, at
libcpp/include/line-map.h:587
0x5e2991 ???
../../src-trunk/libcpp/include/line-map.h:587
0x93aeae ???
../../src-trunk/libcpp/line-map.c:754
0x1d653e2 ???
../../src-trunk/gcc/lto-streamer-in.c:194
0x1d6661f ???
../../src-trunk/gcc/lto-streamer-in.c:304
0xbc5f88 ???
../../src-trunk/gcc/gimple-streamer-in.c:111
0x91d3c7 lto_read_body_or_constructor(lto_file_decl_data*, symtab_node*, char
const*, lto_section_type) [clone .isra.95] [clone .constprop.697]
../../src-trunk/gcc/lto-streamer-in.c:1092
0x22631cd ???
../../src-trunk/gcc/lto-streamer-in.c:1343
0x226e950 ???
../../src-trunk/gcc/cgraphunit.c:2086
0x227fa1b ???
../../src-trunk/gcc/cgraphunit.c:2254
0x23a9564 ???
../../src-trunk/gcc/lto/lto.c:3426
0x1ab4a59 ???
../../src-trunk/gcc/toplev.c:455
0x1ab7d67 ???
../../src-trunk/gcc/toplev.c:2161
0x904cca ???
../../src-trunk/gcc/main.c:39
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
when GCC is configured with
--with-build-config=bootstrap-lto --disable-werror
and built with profiledbootstrap. r263286 is OK.
>From gcc-bugs-return-612236-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 22:39:35 2018
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Subject: [Bug target/71727] -O3 -mstrict-align produces code which assumes unaligned vector accesses work
Date: Mon, 06 Aug 2018 22:39:00 -0000
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Steve Ellcey <sje at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |sje at gcc dot gnu.org
--- Comment #6 from Steve Ellcey <sje at gcc dot gnu.org> ---
Is there any reason this defect cannot be closed out?
>From gcc-bugs-return-612237-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 22:48:47 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86861] 18_support/new_aligned.cc FAILs
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Target Milestone|9.0 |8.3
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Perfect, thanks.
>From gcc-bugs-return-612238-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 23:36:07 2018
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From: "ben at tawesoft dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86873] New: "gcc -lmcheck" aborts on free when using posix_memalign
Date: Mon, 06 Aug 2018 23:36:00 -0000
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Bug ID: 86873
Summary: "gcc -lmcheck" aborts on free when using
posix_memalign
Product: gcc
Version: 4.9.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: ben at tawesoft dot co.uk
Target Milestone: ---
Created attachment 44513
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44513&action=edit
Minimal example (.i version)
Simple C programs using `posix_memalign()` and `free()`, compiled with `gcc
-lmcheck`, cause the resulting binary to raise a runtime error such as
`munmap_chunk(): invalid pointer`.
For example,
#include <stdlib.h>
#include <stdio.h>
int main()
{
void *p = 0;
int ret = posix_memalign(&p, sizeof(void*), 0);
printf("ret was %d, pointer is %p\n", ret, p);
free(p);
return 0;
}
The full example including headers is attached.
Note that "POSIX requires that memory obtained from posix_memalign() can be
freed using free".
Output (my system):
$ gcc test.c -lmcheck -ggdb
$ ./a.out
ret was 0, pointer is 0xcb6090
*** Error in `./a.out': munmap_chunk(): invalid pointer: 0x0000000000cb6060
***
Aborted
Output (NVIDIA developer):
$ gcc test.c -lmcheck -ggdb
$ ./a.out
ret was 0, pointer is 0x558c32d102e0
munmap_chunk(): invalid pointer
Aborted (core dumped)
Expected output:
$ gcc test.c -lmcheck -ggdb
$ ./a.out
ret was 0, pointer is 0x<some-address>
This was initially discovered due to posix_memalign's use in the Nvidia
graphics driver -- discussion here, three people report same symptoms:
https://devtalk.nvidia.com/default/topic/1037171/linux/memory-error-in-glx-programs-when-linked-with-gcc-lmcheck/
For me, here is the GCC version that raises this. I am aware this is an old
version of GCC as provided by what is currently Debian odstable (Jessie), but
others have reported the same results.
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.9/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian
4.9.2-10+deb8u1' --with-bugurl=file:///usr/share/doc/gcc-4.9/README.Bugs
--enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.9 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.9 --libdir=/usr/lib --enable-nls
--with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-vtable-verify
--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-4.9-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --with-arch-32=i586 --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 4.9.2 (Debian 4.9.2-10+deb8u1)
Obviously, I am using an old version of GCC but I hope this bug report may be
of use to anyone using a search engine to lookup a problem with this possible
lmcheck false positive.
>From gcc-bugs-return-612239-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 23:42:44 2018
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Subject: [Bug c/86873] "gcc -lmcheck" aborts on free when using posix_memalign
Date: Mon, 06 Aug 2018 23:42:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |MOVED
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
libmcheck is from glibc, please report it to them.
>From gcc-bugs-return-612240-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 23:43:21 2018
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Subject: [Bug c/86873] "gcc -lmcheck" aborts on free when using posix_memalign
Date: Mon, 06 Aug 2018 23:43:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> libmcheck is from glibc, please report it to them.
https://sourceware.org/bugzilla/
>From gcc-bugs-return-612241-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 23:50:07 2018
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From: "aaron at bestateless dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86874] New: std::swap on std::variant fails to compile
Date: Mon, 06 Aug 2018 23:50:00 -0000
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Bug ID: 86874
Summary: std::swap on std::variant fails to compile
Product: gcc
Version: 8.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: aaron at bestateless dot com
Target Milestone: ---
Created attachment 44514
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44514&action=edit
Preprocessed source.
Example:
#include <variant>
int main(int, char**) {
std::variant<std::monostate> v1, v2;
std::swap(v1, v2);
}
Expected: Compiles successfully. (Worked for me on g++ 7.3).
Actual:
```
$ g++-8 -v
Using built-in specs.
COLLECT_GCC=g++-8
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-1'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-1)
$ g++-8 -std=c++17 test.cpp -save-temps
In file included from test.cpp:1:
/usr/include/c++/8/variant: In instantiation of 'void
std::variant<_Types>::swap(std::variant<_Types>&) [with _Types =
{std::monostate}]':
/usr/include/c++/8/variant:1010:7: required from
'std::enable_if_t<((is_move_constructible_v<_Types> && ...) &&
(is_swappable_v<_Types> && ...))> std::swap(std::variant<_Types ...>&,
std::variant<_Types ...>&) [with _Types = {std::monostate};
std::enable_if_t<((is_move_constructible_v<_Types> && ...) &&
(is_swappable_v<_Types> && ...))> = void]'
test.cpp:5:21: required from here
/usr/include/c++/8/variant:1265:12: error: 'class std::variant<std::monostate>'
has no member named '_M_destructive_move'
this->_M_destructive_move(std::move(__rhs));
~~~~~~^~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:1270:12: error: 'class std::variant<std::monostate>'
has no member named '_M_destructive_move'
__rhs._M_destructive_move(std::move(*this));
~~~~~~^~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:1276:12: error: 'class std::variant<std::monostate>'
has no member named '_M_destructive_move'
__rhs._M_destructive_move(std::move(*this));
~~~~~~^~~~~~~~~~~~~~~~~~~
/usr/include/c++/8/variant:1277:12: error: 'class std::variant<std::monostate>'
has no member named '_M_destructive_move'
this->_M_destructive_move(std::move(__tmp));
~~~~~~^~~~~~~~~~~~~~~~~~~
```
>From gcc-bugs-return-612242-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Aug 06 23:55:52 2018
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From: "ben at tawesoft dot co.uk" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/86873] "gcc -lmcheck" aborts on free when using posix_memalign
Date: Mon, 06 Aug 2018 23:55:00 -0000
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--- Comment #3 from ben at tawesoft dot co.uk ---
Thanks for directing me to the appropriate channel
Here is the link to the matching glibc bug report those anyone following this
https://sourceware.org/bugzilla/show_bug.cgi?id=23489
>From gcc-bugs-return-612243-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 01:45:56 2018
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Subject: [Bug bootstrap/86872] [9 Regression] LTO bootstrap failed with profiledbootstrap
Date: Tue, 07 Aug 2018 01:45:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-07
CC| |dmalcolm at redhat dot com
Target Milestone|--- |9.0
Ever confirmed|0 |1
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
This is caused by r263298.
>From gcc-bugs-return-612244-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 02:41:48 2018
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Subject: [Bug middle-end/86718] [9 Regression] ICE during RTL pass: expand
Date: Tue, 07 Aug 2018 02:41:00 -0000
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--- Comment #2 from zhonghao at pku dot org.cn ---
My gcc:
gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc9.0/configure --enable-languages=c,c++
--disable-multilib
Thread model: posix
gcc version 9.0.0 20180715 (experimental) (GCC)
>From gcc-bugs-return-612245-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 03:14:23 2018
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Subject: [Bug other/25914] strsignal.c:558: warning: comparison between signed and unsigned
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--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to dave.anglin from comment #7)
> On 2018-05-07 4:05 PM, egallager at gcc dot gnu.org wrote:
> > Did this proposal ever happen?
> Yes:
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/psignal.html
OK, so... time to change the libiberty one then? Or is it too late?
>From gcc-bugs-return-612246-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 03:19:49 2018
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Subject: =?UTF-8?B?W0J1ZyB0YXJnZXQvNTI1NTFdIGk2ODYtaW50ZXJpeDM6IHdpbm50LmM6NDAw?= =?UTF-8?B?Ojg6IGVycm9yOiDigJhmbGFnX3dyaXRhYmxlX3JlbF9yZGF0YeKAmSB1bmRl?= =?UTF-8?B?Y2xhcmVk?Date: Tue, 07 Aug 2018 03:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52551
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
Is interix even still a thing or did it get deprecated or something?
>From gcc-bugs-return-612247-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 03:21:12 2018
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Subject: [Bug middle-end/52504] (unreachable) out of bounds access in thread_prologue_and_epilogue_insns
Date: Tue, 07 Aug 2018 03:21:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #1)
> It's been a few years since this report was opened. Can you please check
> with a recent version of GCC whether the warning still occurs? If it does,
> can in addition reduce it to a small test case and include it in your
> comment?
No response to this since having been put in WAITING; closing.
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Subject: [Bug bootstrap/44756] [meta-bug] --enable-werror-always issues
Date: Tue, 07 Aug 2018 03:21:00 -0000
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Bug 44756 depends on bug 52504, which changed state.
Bug 52504 Summary: (unreachable) out of bounds access in thread_prologue_and_epilogue_insns
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52504
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Subject: [Bug tree-optimization/56456] [meta-bug] bogus/missing -Warray-bounds
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Bug 56456 depends on bug 52504, which changed state.
Bug 52504 Summary: (unreachable) out of bounds access in thread_prologue_and_epilogue_insns
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52504
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>From gcc-bugs-return-612250-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 03:23:08 2018
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Subject: [Bug middle-end/54664] expand_gimple_cond warning for predictably small BRANCH_COST
Date: Tue, 07 Aug 2018 03:23:00 -0000
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--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #2)
> (In reply to Hans-Peter Nilsson from comment #1)
> > Also seen for 4.9.1 and 4.10.0 i.e. trunk r212879.
>
> 4.10.0 became 5.0
...and regardless of which way it's numbered, that branch is closed now
anyways.
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Subject: [Bug jit/66594] jitted code should use -mtune=native
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #7)
> Confirming as an enhancement
...actually making that ASSIGNED (instead of NEW) due to that fitting.
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Subject: [Bug jit/66811] RFE: have jit dumps be compileable as C code
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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>From gcc-bugs-return-612253-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 03:45:56 2018
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From: "ldalessandro at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86875] New: internal compiler error: in tsubst_copy, at cp/pt.c:15478
Date: Tue, 07 Aug 2018 03:45:00 -0000
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Bug ID: 86875
Summary: internal compiler error: in tsubst_copy, at
cp/pt.c:15478
Product: gcc
Version: 8.2.0
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Target Milestone: ---
ICE in 8.2 (Debian gcc package) when capturing `const` variable in y_combinator
recursive lambda. This code works fine in 7.x. Capturing by reference or copy
makes no difference. Removing `const` suppresses the ICE.
Attached reduced test.ii test case.
* g++ -std=c++14 -c -o test.o test.ii
* Linux ****** 4.16.0-2-amd64 #1 SMP Debian 4.16.16-2 (2018-06-22) x86_64
GNU/Linux
* gcc version 8.2.0 (Debian 8.2.0-1)
* Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-1'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
---------------------------------
# Terminal session with details #
---------------------------------
$ uname -a
Linux ****** 4.16.0-2-amd64 #1 SMP Debian 4.16.16-2 (2018-06-22) x86_64
GNU/Linux
$ gcc --version
gcc (Debian 8.2.0-1) 8.2.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ cat test.cpp
#include <functional>
// Adapted from
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0200r0.html.
template<class Fun>
class y_combinator_result {
Fun fun_;
public:
template<class T>
explicit y_combinator_result(T &&fun): fun_(std::forward<T>(fun)) {}
template<class ...Args>
decltype(auto) operator()(Args &&...args) {
return fun_(std::ref(*this), std::forward<Args>(args)...);
}
};
template<class Fun>
decltype(auto) y_combinator(Fun &&fun) {
return y_combinator_result<std::decay_t<Fun>>(std::forward<Fun>(fun));
}
int main() {
const unsigned w = 1; // non-const works fine
auto foo = y_combinator([=](auto foo) -> void {
auto i = 0 + w;
foo();
});
foo();
return 0;
}
$ g++ -v -std=c++14 -save-temps -c -o test.o test.cpp
Using built-in specs.
COLLECT_GCC=g++
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-1'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-1)
COLLECT_GCC_OPTIONS='-v' '-std=c++14' '-save-temps' '-c' '-o' 'test.o'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/8/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE test.cpp -mtune=generic -march=x86-64 -std=c++14
-fpch-preprocess -o test.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/8"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/8/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/opt/intel/compilers_and_libraries_2018.1.163/linux/mkl/include
/usr/include/c++/8
/usr/include/x86_64-linux-gnu/c++/8
/usr/include/c++/8/backward
/usr/lib/gcc/x86_64-linux-gnu/8/include
/usr/lib/gcc/x86_64-linux-gnu/8/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-std=c++14' '-save-temps' '-c' '-o' 'test.o'
'-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/8/cc1plus -fpreprocessed test.ii -quiet
-dumpbase test.cpp -mtune=generic -march=x86-64 -auxbase-strip test.o
-std=c++14 -version -o test.s
GNU C++14 (Debian 8.2.0-1) version 8.2.0 (x86_64-linux-gnu)
compiled by GNU C version 8.2.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version isl-0.19-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++14 (Debian 8.2.0-1) version 8.2.0 (x86_64-linux-gnu)
compiled by GNU C version 8.2.0, GMP version 6.1.2, MPFR version 4.0.1,
MPC version 1.1.0, isl version isl-0.19-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 8ef452a0a06f9d64060be385354ae1d5
test.cpp: In instantiation of ‘main()::<lambda(auto:1)> [with auto:1 =
std::reference_wrapper<y_combinator_result<main()::<lambda(auto:1)> > >]’:
test.cpp:13:61: required from ‘decltype(auto)
y_combinator_result<Fun>::operator()(Args&& ...) [with Args = {}; Fun =
main()::<lambda(auto:1)>]’
test.cpp:28:7: required from here
test.cpp:25:18: internal compiler error: in tsubst_copy, at cp/pt.c:15478
auto i = 0 + w;
~~^~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-8/README.Bugs> for instructions.
make: *** [<builtin>: test.o] Error 1
$ apt show gcc
Package: gcc
Version: 4:8.1.0-1
Priority: optional
Build-Essential: yes
Section: devel
Source: gcc-defaults (1.178)
Maintainer: Debian GCC Maintainers <debian-gcc@lists.debian.org>
Installed-Size: 46.1 kB
Provides: c-compiler, gcc-x86-64-linux-gnu (= 4:8.1.0-1)
Depends: cpp (= 4:8.1.0-1), gcc-8 (>= 8.1.0-4~)
Recommends: libc6-dev | libc-dev
Suggests: gcc-multilib, make, manpages-dev, autoconf, automake, libtool, flex,
bison, gdb, gcc-doc
Conflicts: gcc-doc (<< 1:2.95.3)
Tag: devel::compiler, devel::lang:c, devel::library, implemented-in::c,
interface::commandline, role::devel-lib, role::metapackage,
role::program, suite::gnu, works-with::software:source
Download-Size: 5,192 B
APT-Manual-Installed: yes
APT-Sources: http://mirrors.cat.pdx.edu/debian testing/main amd64 Packages
Description: GNU C compiler
This is the GNU C compiler, a fairly portable optimizing compiler for C.
.
This is a dependency package providing the default GNU C compiler.
>From gcc-bugs-return-612254-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 03:49:10 2018
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Subject: [Bug c++/86875] internal compiler error: in tsubst_copy, at cp/pt.c:15478
Date: Tue, 07 Aug 2018 03:49:00 -0000
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--- Comment #1 from Luke Dalessandro <ldalessandro at gmail dot com> ---
Created attachment 44515
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44515&action=edit
Preprocessed source
>From gcc-bugs-return-612255-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 04:17:46 2018
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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/52473] CSHIFT slow - inline it?
Date: Tue, 07 Aug 2018 04:17:00 -0000
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--- Comment #18 from Jürgen Reuter <juergen.reuter at desy dot de> ---
The example by posted on May 20, 2017 on c.l.f. improved by Stefano Zaghi below
shows a factor of 10-20 improvement now in gfortran 9.0.0 including the work by
Thomas Koenig.
$ ./a.out
Elapsed CPU time = 0.33764499999999997
Elapsed CPU time = 0.29224100000000003
Elapsed CPU time = 0.26565400000000006
Here is the code:
program testme
use, intrinsic :: iso_fortran_env
implicit none
integer(int32), parameter :: n = 200
real(real32) :: a(n,n,n), b(n,n,n)
integer(int32) :: j, k
real(real64) :: t1, t2
call random_number(a)
do k = 1, 3
call cpu_time ( t1 )
do j = 1, 100
b = cshift(a, shift=1, DIM=k)
end do
call cpu_time ( t2 )
write ( *, * ) 'Elapsed CPU time = ', t2-t1
end do
end program testme
>From gcc-bugs-return-612256-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 06:57:58 2018
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From: "rockeet at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86876] New: friend typedef'ed class in template class can not compile
Date: Tue, 07 Aug 2018 06:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86876
Bug ID: 86876
Summary: friend typedef'ed class in template class can not
compile
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
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Priority: P3
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// code:
#include <stdio.h>
template<class T>
struct A {
template<class U>
struct X {
void foo(U* p) { printf("p->a = %d\n", p->a); }
};
};
template<class T>
struct B {
typedef typename A<T>::template X<B<T> > X;
// friend typename X; // g++ fail
friend typename B::X; // g++ ok
private:
int a = 1234;
};
int main() {
B<int> a;
B<int>::X().foo(&a);
return 0;
}
/*
Compile error:
template_friend.cpp:12:21: error: expected nested-name-specifier before ‘X’
friend typename X; // g++ fail
^
template_friend.cpp:12:21: error: ‘X’ is neither function nor member function;
cannot be declared friend
template_friend.cpp:12:21: error: ‘int B<T>::X’ conflicts with a previous
declaration
template_friend.cpp:11:43: note: previous declaration ‘typedef typename
A<T>::X<B<T> > B<T>::X’
typedef typename A<T>::template X<B<T> > X;
^
template_friend.cpp: In instantiation of ‘void A<T>::X<U>::foo(U*) [with U =
B<int>; T = int]’:
template_friend.cpp:19:20: required from here
template_friend.cpp:6:45: error: ‘int B<int>::a’ is private within this context
void foo(U* p) { printf("p->a = %d\n", p->a); }
~~~^
template_friend.cpp:15:10: note: declared private here
int a = 1234;
^~~~
*/
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From: "zhonghao at pku dot org.cn" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86181] static object mangling conflicts
Date: Tue, 07 Aug 2018 07:01:00 -0000
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--- Comment #2 from zhonghao at pku dot org.cn ---
I reported the code to llvm. A developer of llvm said:
Clang follows the agreed direction for CWG issue 1839, which says that
redeclaration lookup for 'extern int i;' finds the 'static int i;' declared at
namespace scope and thus the internal linkage is inherited.
Does gcc follow a different lookup?
>From gcc-bugs-return-612258-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 08:02:20 2018
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86877] New: ICE in vectorizable_load, at tree-vect-stmts.c:8038
Date: Tue, 07 Aug 2018 08:02:00 -0000
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Bug ID: 86877
Summary: ICE in vectorizable_load, at tree-vect-stmts.c:8038
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
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Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: aarch64-linux-gnu
Following ICEs:
$ ./xgcc -B.
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/vect/vect-8.f90 --param
vect-epilogues-nomask=1 -Ofast -mstrict-align
during GIMPLE pass: vect
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/vect/vect-8.f90:11:0:
SUBROUTINE kernel(tk)
internal compiler error: in vectorizable_load, at tree-vect-stmts.c:8038
0x1473fd7 vectorizable_load
/home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:8038
0x1479c1e vect_transform_stmt(_stmt_vec_info*, gimple_stmt_iterator*,
_slp_tree*, _slp_instance*)
/home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:9715
0x149dd52 vect_transform_loop_stmt
/home/marxin/Programming/gcc/gcc/tree-vect-loop.c:8224
0x149eaa6 vect_transform_loop(_loop_vec_info*)
/home/marxin/Programming/gcc/gcc/tree-vect-loop.c:8446
0x14c565d try_vectorize_loop_1
/home/marxin/Programming/gcc/gcc/tree-vectorizer.c:945
0x14c583b try_vectorize_loop_1
/home/marxin/Programming/gcc/gcc/tree-vectorizer.c:978
0x14c58f7 try_vectorize_loop
/home/marxin/Programming/gcc/gcc/tree-vectorizer.c:995
0x14c5ad3 vectorize_loops()
/home/marxin/Programming/gcc/gcc/tree-vectorizer.c:1077
0x13549f5 execute
/home/marxin/Programming/gcc/gcc/tree-ssa-loop.c:414
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Subject: [Bug target/86877] ICE in vectorizable_load, at tree-vect-stmts.c:8038
Date: Tue, 07 Aug 2018 08:04:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-8-7
CC| |kyrylo.tkachov at arm dot com,
| |ramana at gcc dot gnu.org,
| |rdsandiford at googlemail dot com
Target Milestone|--- |9.0
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/86877] ICE in vectorizable_load, at tree-vect-stmts.c:8038
Date: Tue, 07 Aug 2018 08:04:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86877
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
>From gcc-bugs-return-612261-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 08:06:15 2018
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Subject: [Bug tree-optimization/86865] [9 Regression] Wrong code w/ -O2 -floop-parallelize-all -fstack-reuse=none -fwrapv -fno-tree-ch -fno-tree-dce -fno-tree-dominator-opts -fno-tree-loop-ivcanon
Date: Tue, 07 Aug 2018 08:06:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-07
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Known to work| |8.1.0
Blocks| |59859
Target Milestone|--- |9.0
Ever confirmed|0 |1
Known to fail| |9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, it's probably related to Graphite.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59859
[Bug 59859] [meta-bug] GRAPHITE issues
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Subject: [Bug c++/86876] friend typedef'ed class in template class can not compile
Date: Tue, 07 Aug 2018 08:09:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2018-8-7
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org,
| |nathan at gcc dot gnu.org
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Note that both clang++ and ICC reject as well:
$ clang++ pr86876.cpp -c
pr86876.cpp:12:22: error: expected a qualified name after 'typename'
friend typename X; // g++ fail
^
1 error generated.
$ source>(12): error: a class or namespace qualified name is required
friend typename X; // g++ fail
^
<source>(6): error #308: member "B<T>::a [with T=int]" (declared at line 15) is
inaccessible
void foo(U* p) { printf("p->a = %d\n", p->a); }
^
detected during instantiation of "void A<T>::X<U>::foo(U *) [with
T=int, U=B<int>]" at line 19
compilation aborted for <source> (code 2)
Compiler returned: 2
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Subject: [Bug c++/86875] [8/9 Regression] ICE in tsubst_copy, at cp/pt.c:15478
Date: Tue, 07 Aug 2018 08:14:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-07
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Summary|internal compiler error: in |[8/9 Regression] ICE in
|tsubst_copy, at |tsubst_copy, at
|cp/pt.c:15478 |cp/pt.c:15478
Ever confirmed|0 |1
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r258398.
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Subject: [Bug libstdc++/86874] [8/9 Regression] std::swap on std::variant fails to compile
Date: Tue, 07 Aug 2018 08:18:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-07
CC| |marxin at gcc dot gnu.org
Known to work| |7.3.0
Target Milestone|--- |8.3
Summary|std::swap on std::variant |[8/9 Regression] std::swap
|fails to compile |on std::variant fails to
| |compile
Ever confirmed|0 |1
Known to fail| |8.2.0, 9.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-612265-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 08:21:24 2018
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Subject: [Bug c++/86871] [8/9 Regression] ICE: gimple check: expected gimple_assign(error_mark), have gimple_call(trunc_mod_expr) in gimple_assign_lhs, at gimple.h:2462
Date: Tue, 07 Aug 2018 08:21:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-07
CC| |marxin at gcc dot gnu.org,
| |rsandifo at gcc dot gnu.org
Target Milestone|--- |8.3
Summary|ICE: gimple check: expected |[8/9 Regression] ICE:
|gimple_assign(error_mark), |gimple check: expected
|have |gimple_assign(error_mark),
|gimple_call(trunc_mod_expr) |have
|in gimple_assign_lhs, at |gimple_call(trunc_mod_expr)
|gimple.h:2462 |in gimple_assign_lhs, at
| |gimple.h:2462
Ever confirmed|0 |1
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r256210.
>From gcc-bugs-return-612266-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 08:26:26 2018
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Subject: [Bug c++/86876] friend typedef'ed class in template class can not compile
Date: Tue, 07 Aug 2018 08:26:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Ever confirmed|0 |1
>From gcc-bugs-return-612267-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 08:32:35 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/86858] [9 Regression] GCC ICE at -O3 in as_a, at is-a.h:197
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-07
CC| |marxin at gcc dot gnu.org,
| |rsandifo at gcc dot gnu.org
Version|unknown |9.0
Target Milestone|--- |9.0
Summary|gcc ICE at -O3 in as_a, at |[9 Regression] GCC ICE at
|is-a.h:197 |-O3 in as_a, at is-a.h:197
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r263132.
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Subject: [Bug tree-optimization/80925] [8 Regression] vect peeling failures
Date: Tue, 07 Aug 2018 08:52:00 -0000
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--- Comment #32 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Tue Aug 7 08:51:29 2018
New Revision: 263352
URL: https://gcc.gnu.org/viewcvs?rev=263352&root=gcc&view=rev
Log:
Fix gcc.dg/vect/no-section-anchors-vect-69.c on SPARC etc. (PR
tree-optimization/80925)
2018-08-07 Steve Ellcey <sellcey@cavium.com>
Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
PR tree-optimization/80925
* gcc.dg/vect/no-section-anchors-vect-69.c: Expect 3 loops
vectorized on !vect_hw_misalign targets.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/vect/no-section-anchors-vect-69.c
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Subject: [Bug c++/86871] [8/9 Regression] ICE: gimple check: expected gimple_assign(error_mark), have gimple_call(trunc_mod_expr) in gimple_assign_lhs, at gimple.h:2462
Date: Tue, 07 Aug 2018 08:52:00 -0000
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--- Comment #4 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Shortened even more by removing operator overload:
int b;
int c;
void g() {
for (int f; f; f++) {
int d = 0;
for (int e = -1; e <= 1; e++) {
int a = f + e;
if (a)
d = *(&c + a);
}
*(&b + f) = d;
}
}
>From gcc-bugs-return-612270-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 08:58:58 2018
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Subject: [Bug tree-optimization/80925] [8 Regression] vect peeling failures
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--- Comment #33 from Rainer Orth <ro at gcc dot gnu.org> ---
Author: ro
Date: Tue Aug 7 08:58:20 2018
New Revision: 263353
URL: https://gcc.gnu.org/viewcvs?rev=263353&root=gcc&view=rev
Log:
Fix gcc.dg/vect/no-section-anchors-vect-69.c on SPARC etc. (PR
tree-optimization/80925)
2018-08-07 Steve Ellcey <sellcey@cavium.com>
Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
PR tree-optimization/80925
* gcc.dg/vect/no-section-anchors-vect-69.c: Expect 3 loops
vectorized on !vect_hw_misalign targets.
Modified:
branches/gcc-8-branch/gcc/testsuite/ChangeLog
branches/gcc-8-branch/gcc/testsuite/gcc.dg/vect/no-section-anchors-vect-69.c
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From: "johannes.hirte at datenkhaos dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86871] [8/9 Regression] ICE: gimple check: expected gimple_assign(error_mark), have gimple_call(trunc_mod_expr) in gimple_assign_lhs, at gimple.h:2462
Date: Tue, 07 Aug 2018 09:08:00 -0000
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johannes.hirte at datenkhaos dot de changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |johannes.hirte at datenkhaos dot d
| |e
--- Comment #5 from johannes.hirte at datenkhaos dot de ---
backtrace:
$ gdb --quiet --args
/home/jhirte/Develop/compiler/gcc-installed/bin/x86_64-pc-linux-gnu-gcc
-march=bdver4 -O2 -ftree-vectorize -o test.o test.ii
Reading symbols from
/home/jhirte/Develop/compiler/gcc-installed/bin/x86_64-pc-linux-gnu-gcc...done.
(gdb) set follow-fork-mode child
(gdb) run
Starting program:
/home/jhirte/Develop/compiler/gcc-installed/bin/x86_64-pc-linux-gnu-gcc
-march=bdver4 -O2 -ftree-vectorize -o test.o test.ii
[New process 4459]
process 4459 is executing new program:
/home/jhirte/Develop/compiler/gcc-installed/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/cc1plus
during GIMPLE pass: vect
test.ii: In function 'void j()':
test.ii:10:6: internal compiler error: gimple check: expected
gimple_assign(error_mark), have gimple_call(round_div_expr) in
gimple_assign_lhs, at gimple.h:2445
void j() {
^
0xae0ea6 gimple_check_failed(gimple const*, char const*, int, char const*,
gimple_code, tree_code)
../../gcc/gcc/gimple.c:1212
0x107bf03 GIMPLE_CHECK2<const gassign*>
../../gcc/gcc/gimple.h:74
0x107bf03 gimple_assign_lhs
../../gcc/gcc/gimple.h:2445
0x107bf03 vect_transform_stmt(gimple*, gimple_stmt_iterator*, bool*,
_slp_tree*, _slp_instance*)
../../gcc/gcc/tree-vect-stmts.c:8973
0x10884f0 vect_transform_loop(_loop_vec_info*)
../../gcc/gcc/tree-vect-loop.c:7782
0x10ad969 vectorize_loops()
../../gcc/gcc/tree-vectorizer.c:740
0xf86b05 execute
../../gcc/gcc/tree-ssa-loop.c:414
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.
[Inferior 2 (process 4459) exited with code 04]
>From gcc-bugs-return-612272-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 09:34:09 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86876] friend typedef'ed class in template class can not compile
Date: Tue, 07 Aug 2018 09:34:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to rockeet from comment #0)
> // code:
> #include <stdio.h>
> template<class T>
> struct A {
> template<class U>
> struct X {
> void foo(U* p) { printf("p->a = %d\n", p->a); }
> };
> };
> template<class T>
> struct B {
> typedef typename A<T>::template X<B<T> > X;
> // friend typename X; // g++ fail
It's not helpful to report a compilation failure for code with the problem
commented out. You need to provide the code that produces the error.
Anyway, this is invalid. The C++ grammar says a typename-specifier must be one
of:
typename nested-name-specifier identifier
typename nested-name-specifier simple-template-id
typename nested-name-specifier template simple-template-id
As the compiler says, a nested-name-specifier is expected, and so your code is
invalid.
>From gcc-bugs-return-612273-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 09:36:01 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86181] static object mangling conflicts
Date: Tue, 07 Aug 2018 09:36:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I've asked you repeatedly to provide links to the clang bugs you're quoting
from.
>From gcc-bugs-return-612274-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 09:52:53 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86181] [DR 1839] static object mangling conflicts
Date: Tue, 07 Aug 2018 09:52:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |accepts-invalid
Status|RESOLVED |SUSPENDED
Last reconfirmed| |2018-08-07
Resolution|INVALID |---
Summary|static object mangling |[DR 1839] static object
|conflicts |mangling conflicts
Ever confirmed|0 |1
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
CWG 1839 hasn't been resolved yet and doesn't even have a proposed resolution
in the issues list. It's not a bug for GCC to follow the current standard.
However DR 426 says it's ill-formed. As a result of DR 426 the meaning of the
program changed from undefined to ill-formed between C++14 and C++17, so GCC
was previously correct, but the standard changed.
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#426
If 1839 is going to make more changes in this area then this PR should be
suspended until any change happens.
>From gcc-bugs-return-612275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 11:16:16 2018
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/86872] [9 Regression] LTO bootstrap failed with profiledbootstrap
Date: Tue, 07 Aug 2018 11:16:00 -0000
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Jan Hubicka <hubicka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hubicka at gcc dot gnu.org
--- Comment #2 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I have seen failure at same point coming and going while working on the
streaming changes. I think it is some kind of overflow problem in linemaps that
needs specific series of events to trigger which is there for some time.
>From gcc-bugs-return-612276-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 11:41:13 2018
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Subject: [Bug bootstrap/32815] crtstuff.c,warning, will always evaluate as 'true'
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John David Anglin <danglin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #8 from John David Anglin <danglin at gcc dot gnu.org> ---
These warnings are not a problem.
>From gcc-bugs-return-612277-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 11:59:55 2018
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Subject: [Bug middle-end/83023] branch probabilities pessimize malloc
Date: Tue, 07 Aug 2018 11:59:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Tue Aug 7 11:59:13 2018
New Revision: 263355
URL: https://gcc.gnu.org/viewcvs?rev=263355&root=gcc&view=rev
Log:
Add malloc predictor (PR middle-end/83023).
2018-08-07 Martin Liska <mliska@suse.cz>
PR middle-end/83023
* predict.c (expr_expected_value_1): Handle DECL_IS_MALLOC,
BUILT_IN_REALLOC and DECL_IS_OPERATOR_NEW.
* predict.def (PRED_MALLOC_NONNULL): New predictor.
* doc/extend.texi: Document that malloc attribute adds
hit to compiler.
2018-08-07 Martin Liska <mliska@suse.cz>
PR middle-end/83023
* gcc.dg/predict-16.c: New test.
* g++.dg/predict-1.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/predict-1.C
trunk/gcc/testsuite/gcc.dg/predict-16.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/doc/extend.texi
trunk/gcc/predict.c
trunk/gcc/predict.def
trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-612278-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 12:01:02 2018
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Subject: [Bug middle-end/83023] branch probabilities pessimize malloc
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Implemented.
>From gcc-bugs-return-612279-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 12:48:35 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/86878] New: G++ should warn about invalid alignments passed to allocation functions
Date: Tue, 07 Aug 2018 12:48:00 -0000
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Bug ID: 86878
Summary: G++ should warn about invalid alignments passed to
allocation functions
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: enhancement
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#include <new>
__attribute__ ((__alloc_align__(2)))
void* alloc(std::size_t, std::size_t);
int main()
{
(void) alloc(10, 5);
(void) ::operator new(10, std::align_val_t{5});
}
This compiles without diagnostics, but should produce two warnings because 5 is
not a power of two and so is not a valid alignment.
The attribute means that the call to alloc(10, 5) returns memory aligned to 5,
which seems unlikely. I think the attribute should imply that the argument is a
valid alignment.
It's undefined to call that operator new with a value that is not a valid
alignment, so a warning is definitely warranted there.
>From gcc-bugs-return-612280-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 12:49:28 2018
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Subject: [Bug fortran/86863] [OOP][F2008] type-bound module procedure name not recognized
Date: Tue, 07 Aug 2018 12:49:00 -0000
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Zaak <zbeekman at gmail dot com> changed:
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CC| |zbeekman at gmail dot com
--- Comment #2 from Zaak <zbeekman at gmail dot com> ---
It appears that `module procedure` can also cause a link-time error that will
get resolved when switching to `module subroutine`. I haven't dug into this too
much, but I get missing/unresolved symbols, but if I switch the implementation
to `module subroutine` then the unresolved symbols go away.
The linker errors look like:
Undefined symbols for architecture x86_64:
"___vtab_fgr_mesh_Fgr.5058", referenced from:
___timestep_MOD_store in Timestep_implementation.f90.o
"___vtab_grid_index_Fd_grid.5056", referenced from:
___timestep_MOD_store in Timestep_implementation.f90.o
"___vtab_material_type_Material.5041", referenced from:
___timestep_MOD_store in Timestep_implementation.f90.o
ld: symbol(s) not found for architecture x86_64
collect2: error: ld returned 1 exit status
Changing `module procedure` to `module subroutine` and adding the interface
variables, variable declarations, etc. resolves this linker issue. So it seems
that the compiler generates code looking for the wrong symbols when `module
procedure` is used vs `module subroutine` inside of a submodule (maybe?)
I'm not entirely sure how to go about creating a minimally complete verifiable
example for this. Compilation was done with GFortran 8.2 (installed via
Homebrew) on macOS and the CMake based build system has the compiler drive the
linker, we don't call ld directly ourselves anywhere.
>From gcc-bugs-return-612281-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 13:04:42 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86879] New: G++ should warn about redundant tests for null pointers returned from functions with __attribute__((returns_nonnull))
Date: Tue, 07 Aug 2018 13:04:00 -0000
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Bug ID: 86879
Summary: G++ should warn about redundant tests for null
pointers returned from functions with
__attribute__((returns_nonnull))
Product: gcc
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void* get() __attribute__((returns_nonnull));
int main() { return get() ? 0 : 1; }
This compiles without any diagnostic, but the check for a null pointer is
redundant because of the attribute.
It seems like this would fit under -Wnonnull-compare
Also, this should produce a similar warning:
int& ref();
int main()
{
return &ref() ? 0 : 1;
}
This check can never fail, because a reference cannot be bound to a null
pointer, but G++ is silent. Clang says:
nonnull.cc:5:11: warning: reference cannot be bound to dereferenced null
pointer in well-defined C++ code; pointer may be assumed to always convert to
true [-Wundefined-bool-conversion]
return &ref() ? 0 : 1;
^~~~~ ~
nonnull.cc:1:6: note: 'ref' returns a reference
int& ref();
^
1 warning generated.
>From gcc-bugs-return-612282-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 13:08:44 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/64463] Add warning: returns_nonnull attribute on a function compared against NULL
Date: Tue, 07 Aug 2018 13:08:00 -0000
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I created the very similar PR 86879 for the C++ front-end (it also covers an
additional case, where a function returns a reference and the address is
compared to null).
>From gcc-bugs-return-612283-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 13:13:20 2018
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Subject: [Bug middle-end/64463] Add warning: returns_nonnull attribute on a function compared against NULL
Date: Tue, 07 Aug 2018 13:13:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Reini Urban from comment #0)
> I would like to see a warning when a returns_nonnull function is compared
> against a NULL value, and then actual code is removed or skipped based on
> that attribute.
I don't care if any code is removed or skipped, I want the warning anyway. If
the code isn't removed then it means you're performing unnecessary work,
pessimising your code.
> Which is either a difficult to diagnose declaration error,
> or a logical error in the usage.
>
> warning: returns_nonnull attribute on a function compared against NULL
This wording seems to be aimed at the author of the function, suggesting that
the attribute might be misplaced. I think the warning should instead be aimed
at the caller, telling them to remove the redundant check.
Incorrectly putting the attribute on the function is likely to be much rarer
than unnecessarily checking the result.
>From gcc-bugs-return-612284-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 13:14:44 2018
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/64463] Add warning: returns_nonnull attribute on a function compared against NULL
Date: Tue, 07 Aug 2018 13:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64463
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> Incorrectly putting the attribute on the function is likely to be much rarer
> than unnecessarily checking the result.
And PR 84202 would address the problem of incorrectly placing the attribute,
and would be based on the definition, not how the callers use it.
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Subject: [Bug libstdc++/86874] [8/9 Regression] std::swap on std::variant fails to compile
Date: Tue, 07 Aug 2018 13:18:00 -0000
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From: "ville at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/79133] lambda capture shadowing parameter & decltype confusion
Date: Tue, 07 Aug 2018 13:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79133
--- Comment #6 from ville at gcc dot gnu.org ---
Author: ville
Date: Tue Aug 7 13:46:16 2018
New Revision: 263357
URL: https://gcc.gnu.org/viewcvs?rev=263357&root=gcc&view=rev
Log:
PR c++/79133
gcc/cp/
PR c++/79133
* name-lookup.c (check_local_shadow): Reject captures and parameters
with the same name.
testsuite/
PR c++/79133
* g++.dg/cpp0x/lambda/lambda-shadow3.C: New.
* g++.dg/cpp1y/lambda-generic-variadic18.C: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-shadow3.C
trunk/gcc/testsuite/g++.dg/cpp1y/lambda-generic-variadic18.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/name-lookup.c
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Subject: [Bug c++/54367] [meta-bug] lambda expressions
Date: Tue, 07 Aug 2018 13:47:00 -0000
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Bug 54367 depends on bug 79133, which changed state.
Bug 79133 Summary: lambda capture shadowing parameter & decltype confusion
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79133
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Subject: [Bug c++/79133] lambda capture shadowing parameter & decltype confusion
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Ville Voutilainen <ville.voutilainen at gmail dot com> changed:
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--- Comment #7 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Fixed.
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Subject: [Bug target/86807] spu port needs updating for CVE-2017-5753
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--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Author: rearnsha
Date: Tue Aug 7 14:33:09 2018
New Revision: 263358
URL: https://gcc.gnu.org/viewcvs?rev=263358&root=gcc&view=rev
Log:
Fix PR number for HPPA speculation patch: PR target/86807 -> PR target/86785
This just fixes the PR number in the ChangeLog. Nothing we can do
about the SVN history.
Modified:
trunk/gcc/ChangeLog
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Subject: [Bug target/86785] hppa port needs updating for CVE-2017-5753
Date: Tue, 07 Aug 2018 14:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86785
--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Author: rearnsha
Date: Tue Aug 7 14:33:09 2018
New Revision: 263358
URL: https://gcc.gnu.org/viewcvs?rev=263358&root=gcc&view=rev
Log:
Fix PR number for HPPA speculation patch: PR target/86807 -> PR target/86785
This just fixes the PR number in the ChangeLog. Nothing we can do
about the SVN history.
Modified:
trunk/gcc/ChangeLog
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Subject: [Bug target/86772] [meta-bug] tracking port status for CVE-2017-5753
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Bug 86772 depends on bug 86785, which changed state.
Bug 86785 Summary: hppa port needs updating for CVE-2017-5753
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86785
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Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
Really fixed by commit r263344
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From: "hstong at ca dot ibm.com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86880] New: Incorrect mersenne_twister_engine equality comparison between rotated states
Date: Tue, 07 Aug 2018 14:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86880
Bug ID: 86880
Summary: Incorrect mersenne_twister_engine equality comparison
between rotated states
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: hstong at ca dot ibm.com
Target Milestone: ---
mersenne_twister_engines whose textual representation should be equal should
also compare equal.
The following program has two engines with initial states
|2 1 2
and
|3 1 2.
The engine with state |3 1 2 transitions to states
0 |1 2,
0 2 |2,
|0 2 1,
and
2 |2 1.
The textual representation of states |2 1 2 and 2 |2 1 are both specified to
be "2 1 2". That is, adjusted by rotation, the states are the same.
The engines are compared while in those states.
The comparison fails with libstdc++.
Online compiler: https://wandbox.org/permlink/RqdbiJZk6gVN0ici
Note: libstdc++ does not produce "2 1 2" as the textual representation
(as reported by PR 60441).
=== SOURCE (<stdin>):
#include <random>
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <cassert>
#ifdef TRACE
#include <iostream>
#undef TRACE
#define TRACE( X ) do { X } while(0)
#else
#define TRACE( X ) //
#endif
int main(void) {
typedef unsigned int EngResType;
constexpr size_t word_size = 3u;
constexpr size_t state_size = 3u;
constexpr size_t shift_size = 1u;
constexpr size_t tempering_l = word_size;
using namespace std;
using EngineType = std::mersenne_twister_engine<
EngResType, word_size, state_size,
shift_size,
0u,
0x0,
0u, 0x0,
0u, 0x0,
0u, 0x0,
tempering_l,
0>;
EngineType mteA(0b010), mteB(0b011);
TRACE( cout << "Engine A: " << mteA << endl;
cout << "Engine B: " << mteB << "\n" << endl; );
for (int i = 0; i < 4; ++i) {
mteB();
TRACE( cout << "Engine B: " << mteB << endl; );
}
TRACE( cout << "\nEngine A: " << mteA << endl;
cout << "Engine B: " << mteB << endl; );
assert(mteA == mteB);
}
=== COMPILER INVOCATION:
g++ -std=c++17 -pedantic-errors -Wall -Wextra -Werror -xc++ - -o ./a.out
=== RUN SCRIPT:
./a.out
=== EXPECTED RUN OUTPUT:
(Exits with rc=0).
=== ACTUAL RUN OUTPUT:
a.out: <stdin>:47: int main(): Assertion `mteA == mteB' failed.
=== COMPILER VERSION INFO:
Using built-in specs.
COLLECT_GCC=/opt/wandbox/gcc-head/bin/g++
COLLECT_LTO_WRAPPER=/opt/wandbox/gcc-head/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../source/configure --prefix=/opt/wandbox/gcc-head
--enable-languages=c,c++ --disable-multilib --without-ppl --without-cloog-ppl
--enable-checking=release --disable-nls --enable-lto
LDFLAGS=-Wl,-rpath,/opt/wandbox/gcc-head/lib,-rpath,/opt/wandbox/gcc-head/lib64,-rpath,/opt/wandbox/gcc-head/lib32
Thread model: posix
gcc version 9.0.0 20180805 (experimental) (GCC)
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From: "qinzhao at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/86519] [9 Regression] New test case gcc.dg/strcmpopt_6.c fails with its introduction in r262636
Date: Tue, 07 Aug 2018 14:42:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86519
--- Comment #14 from qinzhao at gcc dot gnu.org ---
reported by christophe.lyon@linaro.org:
After this change,(disable strcmp/strncmp inlining with O2 below and Os), I've
noticed that:
FAIL: gcc.dg/strcmpopt_6.c scan-rtl-dump-times expand "__builtin_memcmp" 6
on arm-none-linux-gnueabi
--with-mode thumb
--with-cpu cortex-a9
and forcing -march=armv5t via RUNTESTFLAGS
The log says:
gcc.dg/strcmpopt_6.c: pattern found 4 times
FAIL: gcc.dg/strcmpopt_6.c scan-rtl-dump-times expand "__builtin_memcmp" 6
although this is NOT the exactly same bug as this PR, I listed here to fix the
testcase all together with this PR.
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From: "dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/86872] [9 Regression] LTO bootstrap failed with profiledbootstrap
Date: Tue, 07 Aug 2018 15:04:00 -0000
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David Malcolm <dmalcolm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dmalcolm at gcc dot gnu.org
--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #0)
> On x86-64, r263300 gave
Annotating it with the code in question:
> In function ‘gimple_simplify_32’:
> lto1: internal compiler error: in linemap_check_ordinary, at libcpp/include/line-map.h:587
> 0x5e2991 ???
> ../../src-trunk/libcpp/include/line-map.h:587
linemap_assert (MAP_ORDINARY_P (map));
> 0x93aeae ???
> ../../src-trunk/libcpp/line-map.c:754
In linemap_line_start:
/* Allocate the new line_map. However, if the current map only has a
single line we can sometimes just increase its column_bits instead. */
if (line_delta < 0
|| last_line != ORDINARY_MAP_STARTING_LINE_NUMBER (map)
|| SOURCE_COLUMN (map, highest) >= (1U << (column_bits - range_bits))
|| range_bits < map->m_range_bits)
map = linemap_check_ordinary
(const_cast <line_map *>
(linemap_add (set, LC_RENAME,
ORDINARY_MAP_IN_SYSTEM_HEADER_P (map),
ORDINARY_MAP_FILE_NAME (map),
to_line)));
> 0x1d653e2 ???
> ../../src-trunk/gcc/lto-streamer-in.c:194
in lto_location_cache::apply_location_cache ():
linemap_line_start (line_table, loc.line, max + 1);
> 0x1d6661f ???
> ../../src-trunk/gcc/lto-streamer-in.c:304
in stream_input_location_now:
data_in->location_cache.apply_location_cache ();
> 0xbc5f88 ???
> ../../src-trunk/gcc/gimple-streamer-in.c:111
in input_gimple_stmt:
/* Read location information. Caching here makes no sense until streamer
cache can handle the following gimple_set_block. */
gimple_set_location (stmt, stream_input_location_now (&bp, data_in));
(etc)
linemap_add can return NULL with LC_LEAVE, but we have LC_RENAME.
The return value ("map") comes from:
linemap_assert (reason != LC_ENTER_MACRO);
line_map_ordinary *map
= linemap_check_ordinary (new_linemap (set, start_location));
map->reason = reason;
linemap_check_ordinary is:
linemap_assert (MAP_ORDINARY_P (map));
which, in turn is:
inline bool
MAP_ORDINARY_P (const line_map *map)
{
return map->start_location < LINE_MAP_MAX_LOCATION;
}
map->start_location shouldn't be able to change.
I believe what's happened is that:
to_line >= LINE_MAP_MAX_LOCATION
within linemap_line_start.
That way, linemap_add would (unexpectedly) create a macro map, rather than an
ordinary map.
Presumably we need some kind of overflow handling here (assuming that the above
correctly characterizes the cause of the crash).
Also, it seems bad to be running out of location_t values. We probably should
double-check that we're packing things efficiently.
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From: "hjl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86386] [8/9 Regression] unaligned load from stack with -Os -fno-tree-dce -mstringop-strategy=vector_loop -mavx512bw
Date: Tue, 07 Aug 2018 15:06:00 -0000
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--- Comment #8 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Aug 7 15:06:01 2018
New Revision: 263359
URL: https://gcc.gnu.org/viewcvs?rev=263359&root=gcc&view=rev
Log:
i386: Set cfun->machine->max_used_stack_alignment if needed
cfun->machine->max_used_stack_alignment is used to decide how stack frame
should be aligned. This is independent of any psABIs nor 32-bit vs 64-bit.
It is always safe to compute max_used_stack_alignment. We compute it only
if 128-bit aligned load/store may be generated on misaligned stack slot
which will lead to segfault.
gcc/
Backport from mainline
PR target/86386
* config/i386/i386.c (ix86_finalize_stack_frame_flags): Set
cfun->machine->max_used_stack_alignment if needed.
gcc/testsuite/
Backport from mainline
PR target/86386
* gcc.target/i386/pr86386.c: New file.
Added:
branches/gcc-8-branch/gcc/testsuite/gcc.target/i386/pr86386.c
Modified:
branches/gcc-8-branch/gcc/ChangeLog
branches/gcc-8-branch/gcc/config/i386/i386.c
branches/gcc-8-branch/gcc/testsuite/ChangeLog
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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86386] [8/9 Regression] unaligned load from stack with -Os -fno-tree-dce -mstringop-strategy=vector_loop -mavx512bw
Date: Tue, 07 Aug 2018 15:10:00 -0000
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixed for GCC 9 and 8.3.
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/86861] 18_support/new_aligned.cc FAILs
Date: Tue, 07 Aug 2018 16:11:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Aug 7 16:10:29 2018
New Revision: 263360
URL: https://gcc.gnu.org/viewcvs?rev=263360&root=gcc&view=rev
Log:
PR libstdc++/86861 Meet precondition for Solaris memalign
Solaris memalign requires alignment to be at least sizeof(int), so
increase it as needed.
Also move the check for valid alignments from the fallback
implementation of aligned_alloc into operator new, as it's required for
all of aligned_alloc, memalign, posix_memalign and __aligned_malloc.
This adds a branch to check for undefined behaviour which we could just
ignore, so the check could just be removed. It should certainly be
removed if PR 86878 is implemented to issue a warning about calls with
invalid alignments.
PR libstdc++/86861
* libsupc++/new_opa.cc [_GLIBCXX_HAVE_MEMALIGN] (aligned_alloc):
Replace macro with inline function.
[__sun]: Increase alignment to meet memalign precondition.
[!HAVE__ALIGNED_MALLOC && !HAVE_POSIX_MEMALIGN && !HAVE_MEMALIGN]
(aligned_alloc): Move check for valid alignment to operator new.
Remove redundant check for non-zero size, it's enforced by the caller.
(operator new): Move check for valid alignment here. Use
__builtin_expect on check for zero size.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/libsupc++/new_opa.cc
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/86878] G++ should warn about invalid alignments passed to allocation functions
Date: Tue, 07 Aug 2018 16:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86878
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Tue Aug 7 16:10:29 2018
New Revision: 263360
URL: https://gcc.gnu.org/viewcvs?rev=263360&root=gcc&view=rev
Log:
PR libstdc++/86861 Meet precondition for Solaris memalign
Solaris memalign requires alignment to be at least sizeof(int), so
increase it as needed.
Also move the check for valid alignments from the fallback
implementation of aligned_alloc into operator new, as it's required for
all of aligned_alloc, memalign, posix_memalign and __aligned_malloc.
This adds a branch to check for undefined behaviour which we could just
ignore, so the check could just be removed. It should certainly be
removed if PR 86878 is implemented to issue a warning about calls with
invalid alignments.
PR libstdc++/86861
* libsupc++/new_opa.cc [_GLIBCXX_HAVE_MEMALIGN] (aligned_alloc):
Replace macro with inline function.
[__sun]: Increase alignment to meet memalign precondition.
[!HAVE__ALIGNED_MALLOC && !HAVE_POSIX_MEMALIGN && !HAVE_MEMALIGN]
(aligned_alloc): Move check for valid alignment to operator new.
Remove redundant check for non-zero size, it's enforced by the caller.
(operator new): Move check for valid alignment here. Use
__builtin_expect on check for zero size.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/libsupc++/new_opa.cc
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From: "paolo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/59480] Missing error diagnostic: friend declaration specifying a default argument must be a definition
Date: Tue, 07 Aug 2018 16:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59480
--- Comment #21 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue Aug 7 16:40:18 2018
New Revision: 263361
URL: https://gcc.gnu.org/viewcvs?rev=263361&root=gcc&view=rev
Log:
/cp
2018-08-07 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/59480, DR 136
* decl.c (check_no_redeclaration_friend_default_args): New.
(duplicate_decls): Use the latter; also check that a friend
declaration specifying default arguments is a definition.
/testsuite
2018-08-07 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/59480, DR 136
* g++.dg/other/friend8.C: New.
* g++.dg/other/friend9.C: Likewise.
* g++.dg/other/friend10.C: Likewise.
* g++.dg/other/friend11.C: Likewise.
* g++.dg/other/friend12.C: Likewise.
* g++.dg/other/friend13.C: Likewise.
* g++.dg/other/friend14.C: Likewise.
* g++.dg/other/friend15.C: Likewise.
* g++.dg/parse/defarg4.C: Compile with -fpermissive -w.
* g++.dg/parse/defarg8.C: Likewise.
Added:
trunk/gcc/testsuite/g++.dg/other/friend10.C
trunk/gcc/testsuite/g++.dg/other/friend11.C
trunk/gcc/testsuite/g++.dg/other/friend12.C
trunk/gcc/testsuite/g++.dg/other/friend13.C
trunk/gcc/testsuite/g++.dg/other/friend14.C
trunk/gcc/testsuite/g++.dg/other/friend15.C
trunk/gcc/testsuite/g++.dg/other/friend8.C
trunk/gcc/testsuite/g++.dg/other/friend9.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/decl.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/parse/defarg4.C
trunk/gcc/testsuite/g++.dg/parse/defarg8.C
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Subject: [Bug c++/59480] Missing error diagnostic: friend declaration specifying a default argument must be a definition
Date: Tue, 07 Aug 2018 16:47:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #22 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Closing again.
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Subject: [Bug testsuite/86519] [9 Regression] New test case gcc.dg/strcmpopt_6.c fails with its introduction in r262636
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--- Comment #15 from qinzhao at gcc dot gnu.org ---
Created attachment 44516
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44516&action=edit
proposed patch
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Subject: [Bug testsuite/86519] [9 Regression] New test case gcc.dg/strcmpopt_6.c fails with its introduction in r262636
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--- Comment #16 from qinzhao at gcc dot gnu.org ---
please test the proposed patch on your platform, let me know the result.
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Subject: [Bug debug/86593] [8/9 Regression] internal compiler error: in based_loc_descr, at dwarf2out.c:14272
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--- Comment #2 from Sandro Mani <manisandro at gmail dot com> ---
Started with
commit cd557ff63f388ad27c376d0a225e74d3594a6f9d
Author: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu Aug 10 15:29:05 2017 +0000
i386: Don't use frame pointer without stack access
When there is no stack access, there is no need to use frame pointer
even if -fno-omit-frame-pointer is used and caller's frame pointer is
unchanged.
gcc/
PR target/81736
* config/i386/i386.c (ix86_finalize_stack_realign_flags): Renamed
to ...
(ix86_finalize_stack_frame_flags): This. Also clear
frame_pointer_needed if -fno-omit-frame-pointer is used without
stack access.
(ix86_expand_prologue): Replace ix86_finalize_stack_realign_flags
with ix86_finalize_stack_frame_flags.
(ix86_expand_epilogue): Likewise.
(ix86_expand_split_stack_prologue): Likewise.
* doc/invoke.texi: Add a note for -fno-omit-frame-pointer.
gcc/testsuite/
PR target/81736
* gcc.target/i386/pr81736-1.c: New test.
* gcc.target/i386/pr81736-2.c: Likewise.
* gcc.target/i386/pr81736-3.c: Likewise.
* gcc.target/i386/pr81736-4.c: Likewise.
* gcc.target/i386/pr81736-5.c: Likewise.
* gcc.target/i386/pr81736-6.c: Likewise.
* gcc.target/i386/pr81736-7.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@251028
138bc75d-0d04-0410-961f-82ee72b054a4
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Subject: [Bug c++/86871] [8/9 Regression] ICE: gimple check: expected gimple_assign(error_mark), have gimple_call(trunc_mod_expr) in gimple_assign_lhs, at gimple.h:2462
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #6 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Mine.
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Subject: [Bug tree-optimization/86858] [9 Regression] GCC ICE at -O3 in as_a, at is-a.h:197
Date: Tue, 07 Aug 2018 17:19:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Mine.
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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86838] [9 Regression] ICE in gen_aarch64_frecpe, at ./insn-opinit.h:571
Date: Tue, 07 Aug 2018 17:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86838
--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Author: rsandifo
Date: Tue Aug 7 17:22:19 2018
New Revision: 263362
URL: https://gcc.gnu.org/viewcvs?rev=263362&root=gcc&view=rev
Log:
[AArch64] Fix -mlow-precision-div (PR 86838)
The "@" handling broke -mlow-precision-div, because the scalar forms of
the instruction were provided by a pattern that also provided FRECPX
(and so were parameterised on an unspec code as well as a mode),
while the SIMD versions had a dedicated FRECPE pattern. This patch
moves the scalar FRECPE handling to the SIMD pattern too (as for FRECPS)
and uses a separate pattern for FRECPX.
The convention in aarch64-simd-builtins.def seemed to be to add
comments only if the mapping wasn't obvious (i.e. not just sticking
"aarch64_" on the beginning and "<mode>" on the end), so the patch
deletes the reference to the combined pattern instead of rewording it.
There didn't seem to be any coverage of -mlow-precision-div in the
testsuite, so the patch adds some tests for it.
2018-08-07 Richard Sandiford <richard.sandiford@arm.com>
gcc/
PR target/86838
* config/aarch64/iterators.md (FRECP, frecp_suffix): Delete.
* config/aarch64/aarch64-simd.md
(aarch64_frecp<FRECP:frecp_suffix><mode>): Fold FRECPE into...
(@aarch64_frecpe<mode>): ...here and the move FRECPX to...
(aarch64_frecpx<mode>): ...this new pattern.
* config/aarch64/aarch64-simd-builtins.def: Remove comment
about aarch64_frecp<FRECP:frecp_suffix><mode>.
gcc/testsuite/
PR target/86838
* gcc.target/aarch64/frecpe_1.c: New test.
* gcc.target/aarch64/frecpe_2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/aarch64/frecpe_1.c
trunk/gcc/testsuite/gcc.target/aarch64/frecpe_2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/aarch64/aarch64-simd-builtins.def
trunk/gcc/config/aarch64/aarch64-simd.md
trunk/gcc/config/aarch64/iterators.md
trunk/gcc/testsuite/ChangeLog
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From: "manisandro at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/86593] [8/9 Regression] internal compiler error: in based_loc_descr, at dwarf2out.c:14272
Date: Tue, 07 Aug 2018 17:23:00 -0000
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Sandro Mani <manisandro at gmail dot com> changed:
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----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com
--- Comment #3 from Sandro Mani <manisandro at gmail dot com> ---
@hjl.tools@gmail.com Any ideas?
>From gcc-bugs-return-612309-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Aug 07 17:42:10 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/86838] [9 Regression] ICE in gen_aarch64_frecpe, at ./insn-opinit.h:571
Date: Tue, 07 Aug 2018 17:42:00 -0000
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rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
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--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug libstdc++/60441] Incorrect textual representation for std::mersenne_twister_engine
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Subject: [Bug libstdc++/86880] Incorrect mersenne_twister_engine equality comparison between rotated states
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