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* [Bug c++/64867] New: warning for passing non-POD to varargs function
@ 2015-01-29 17:38 tromey at gcc dot gnu.org
2015-01-29 18:28 ` [Bug c++/64867] " pinskia at gcc dot gnu.org
` (14 more replies)
0 siblings, 15 replies; 16+ messages in thread
From: tromey at gcc dot gnu.org @ 2015-01-29 17:38 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
Bug ID: 64867
Summary: warning for passing non-POD to varargs function
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tromey at gcc dot gnu.org
Currently gcc does not warn if I pass a non-POD to a
varargs function. It would have been useful recently
if there was an option to make gcc warn about this.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
@ 2015-01-29 18:28 ` pinskia at gcc dot gnu.org
2015-01-29 18:30 ` redi at gcc dot gnu.org
` (13 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-01-29 18:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>From https://gcc.gnu.org/gcc-4.5/changes.html:
Diagnostics that used to complain about passing non-POD types to ... or jumping
past the declaration of a non-POD variable now check for triviality rather than
PODness, as per C++0x.
See PR 37907.
And having an example would be useful too. Because of the change between C++98
and C++11.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
2015-01-29 18:28 ` [Bug c++/64867] " pinskia at gcc dot gnu.org
@ 2015-01-29 18:30 ` redi at gcc dot gnu.org
2015-01-29 18:31 ` jason at gcc dot gnu.org
` (12 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: redi at gcc dot gnu.org @ 2015-01-29 18:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Jason informs me it's now a warning enabled by -Wconditionally-supported
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
2015-01-29 18:28 ` [Bug c++/64867] " pinskia at gcc dot gnu.org
2015-01-29 18:30 ` redi at gcc dot gnu.org
@ 2015-01-29 18:31 ` jason at gcc dot gnu.org
2015-01-29 20:45 ` tromey at gcc dot gnu.org
` (11 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: jason at gcc dot gnu.org @ 2015-01-29 18:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Passing a non-POD to a varargs function is conditionally-supported, with
implementation-defined semantics. In GCC 5 it's supported and treated like
normal pass-by-value. You can get a diagnostic about it with
-Wconditionally-supported.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (2 preceding siblings ...)
2015-01-29 18:31 ` jason at gcc dot gnu.org
@ 2015-01-29 20:45 ` tromey at gcc dot gnu.org
2015-01-30 17:04 ` tromey at gcc dot gnu.org
` (10 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: tromey at gcc dot gnu.org @ 2015-01-29 20:45 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #4 from Tom Tromey <tromey at gcc dot gnu.org> ---
Thanks, I'll give it a try.
Here's my test case FWIW and a short demo showing what clang does:
pokyo. cat q.cc
#include <stdarg.h>
class ConstUTF8CharsZ
{
const char *mData;
public:
ConstUTF8CharsZ() : mData(0)
{
}
explicit ConstUTF8CharsZ(const char *aBytes)
: mData(aBytes)
{
}
const void *get() const { return mData; }
const char *c_str() const { return mData; }
operator bool() const { return mData != 0; }
};
void zzz(const char *x, ...) {
}
void m(const char *m) {
ConstUTF8CharsZ cu(m);
zzz(m, cu);
}
pokyo. clang++ q.cc
q.cc:30:10: error: cannot pass object of non-POD type 'ConstUTF8CharsZ' through
variadic function; call will abort at runtime [-Wnon-pod-varargs]
zzz(m, cu);
^
1 error generated.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (3 preceding siblings ...)
2015-01-29 20:45 ` tromey at gcc dot gnu.org
@ 2015-01-30 17:04 ` tromey at gcc dot gnu.org
2015-01-30 17:12 ` tromey at gcc dot gnu.org
` (9 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: tromey at gcc dot gnu.org @ 2015-01-30 17:04 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #5 from Tom Tromey <tromey at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #3)
> Passing a non-POD to a varargs function is conditionally-supported, with
> implementation-defined semantics. In GCC 5 it's supported and treated like
> normal pass-by-value. You can get a diagnostic about it with
> -Wconditionally-supported.
I tried this today and it does not work with the test case in comment #4.
pokyo. gcc --version
gcc (GCC) 5.0.0 20150129 (experimental)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
pokyo. g++ --std=c++11 --syntax-only -Wall -Wconditionally-supported q.cc
pokyo.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (4 preceding siblings ...)
2015-01-30 17:04 ` tromey at gcc dot gnu.org
@ 2015-01-30 17:12 ` tromey at gcc dot gnu.org
2015-01-30 17:23 ` pinskia at gcc dot gnu.org
` (8 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: tromey at gcc dot gnu.org @ 2015-01-30 17:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #6 from Tom Tromey <tromey at gcc dot gnu.org> ---
Also, -Wconditionally-supported triggers other warning as well.
It would be more convenient if different warnings were individually
controllable; and then something like -Wconditionally-supported
would act as if I'd specified all the sub-options.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (5 preceding siblings ...)
2015-01-30 17:12 ` tromey at gcc dot gnu.org
@ 2015-01-30 17:23 ` pinskia at gcc dot gnu.org
2015-01-30 17:26 ` pinskia at gcc dot gnu.org
` (7 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-01-30 17:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Tom Tromey from comment #5)
> (In reply to Jason Merrill from comment #3)
> > Passing a non-POD to a varargs function is conditionally-supported, with
> > implementation-defined semantics. In GCC 5 it's supported and treated like
> > normal pass-by-value. You can get a diagnostic about it with
> > -Wconditionally-supported.
>
> I tried this today and it does not work with the test case in comment #4.
>
> pokyo. gcc --version
> gcc (GCC) 5.0.0 20150129 (experimental)
> Copyright (C) 2015 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
> pokyo. g++ --std=c++11 --syntax-only -Wall -Wconditionally-supported q.cc
> pokyo.
Are you sure that class is not trivial which is why gcc is not warning about
it? C++11 does not really have pod and non-pod any more but rather trivial and
non-trivial and the rules has chnaged with respect of constructures.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (6 preceding siblings ...)
2015-01-30 17:23 ` pinskia at gcc dot gnu.org
@ 2015-01-30 17:26 ` pinskia at gcc dot gnu.org
2015-01-30 17:40 ` tromey at gcc dot gnu.org
` (6 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: pinskia at gcc dot gnu.org @ 2015-01-30 17:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2342.htm . It does
look like gcc is implementing the correct new pod rules and clang is not.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (7 preceding siblings ...)
2015-01-30 17:26 ` pinskia at gcc dot gnu.org
@ 2015-01-30 17:40 ` tromey at gcc dot gnu.org
2015-01-31 2:37 ` redi at gcc dot gnu.org
` (5 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: tromey at gcc dot gnu.org @ 2015-01-30 17:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #9 from Tom Tromey <tromey at gcc dot gnu.org> ---
> Are you sure that class is not trivial which is why gcc is not warning about
> it? C++11 does not really have pod and non-pod any more but rather trivial
> and non-trivial and the rules has chnaged with respect of constructures.
I hesitate to say I'm sure :)
However my belief is that because this class has a user-provided
default constructor, it is not trivial.
I tested this by adding "#include <type_traits>" and then
static_assert(!std::is_trivial<ConstUTF8CharsZ>::value, "whoops");
Trivial or not, I'd like to get a warning here. In firefox varargs
is really only used for printf-like things; but for various reasons
there are some custom implementations which can't be marked
with the "printf" attribute. So while doing a refactoring it turned
out I inadvertently changed code to pass objects rather than char*
to one of these ... but finding the problem locations is proving
to be rather difficult.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (8 preceding siblings ...)
2015-01-30 17:40 ` tromey at gcc dot gnu.org
@ 2015-01-31 2:37 ` redi at gcc dot gnu.org
2015-02-02 19:38 ` tromey at gcc dot gnu.org
` (4 subsequent siblings)
14 siblings, 0 replies; 16+ messages in thread
From: redi at gcc dot gnu.org @ 2015-01-31 2:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Tom Tromey from comment #9)
> However my belief is that because this class has a user-provided
> default constructor, it is not trivial.
True, but ...
> I tested this by adding "#include <type_traits>" and then
>
> static_assert(!std::is_trivial<ConstUTF8CharsZ>::value, "whoops");
That's the wrong thing to assert:
Passing a potentially-evaluated argument of class type (Clause 9)
having a non-trivial copy constructor, a non-trivial move constructor,
or a non-trivial destructor, with no corresponding parameter, is
conditionally-supported with implementation-defined semantics.
Your type has a trivial copy constructor and trivial move constructor and
trivial destructor, so passing it to a varargs function is well-defined.
Give it a non-trivial destructor and you get a warning:
cs.cc: In function ‘void m(const char*)’:
cs.cc:33:12: warning: passing objects of non-trivially-copyable type ‘class
ConstUTF8CharsZ’ through ‘...’ is conditionally supported
[-Wconditionally-supported]
zzz(m, cu);
^
>From gcc-bugs-return-475589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Jan 31 02:39:17 2015
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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++/64867] warning for passing non-POD to varargs function
Date: Sat, 31 Jan 2015 02:39:00 -0000
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--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
N.B. trivially-copyable is not the same as trivial (and there are separate type
traits for testing those two properties).
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (9 preceding siblings ...)
2015-01-31 2:37 ` redi at gcc dot gnu.org
@ 2015-02-02 19:38 ` tromey at gcc dot gnu.org
2017-09-05 14:11 ` rsandifo at gcc dot gnu.org
` (3 subsequent siblings)
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From: tromey at gcc dot gnu.org @ 2015-02-02 19:38 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #13 from Tom Tromey <tromey at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #11)
> That's the wrong thing to assert:
Aha, thank you very much. I obviously did not realize the difference :)
Unfortunately I think even if I made this change I probably wouldn't
want to enable -Wconditionally-supported here, as it enables some
other warning that IIRC isn't desirable here.
I ended up writing a gcc plugin to find places passing an aggregate
to a varargs function. But I still think some simpler way to get
a warning here would be nice.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] warning for passing non-POD to varargs function
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (10 preceding siblings ...)
2015-02-02 19:38 ` tromey at gcc dot gnu.org
@ 2017-09-05 14:11 ` rsandifo at gcc dot gnu.org
2021-09-03 18:17 ` [Bug c++/64867] split warning for passing non-POD to varargs function from -Wconditionally-supported into new warning flag, -Wnon-pod-varargs dcb314 at hotmail dot com
` (2 subsequent siblings)
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From: rsandifo at gcc dot gnu.org @ 2017-09-05 14:11 UTC (permalink / raw)
To: gcc-bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu.org
--- Comment #18 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #16)
> (In reply to John Steele Scott from comment #14)
> > FWIW Clang has this warning via -Wnon-pod-varargs.
>
> Confirmed, gcc having this warning would help avoid:
> http://gcc.gnu.org/ml/gcc-patches/2017-09/msg00126.html
Yeah. The situation is similar to the code in comment #4,
which as Jakub says in comment #10 no longer produces a warning
with g++ -Wconditionally-supported. I had to add a dummy
destructor to get one.
>From gcc-bugs-return-574343-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 14:24:43 2017
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From: "thiago at kde dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/71660] [5/6/7/8 regression] alignment of std::atomic<8 byte primitive type> (long long, double) is wrong on x86
Date: Tue, 05 Sep 2017 14:24:00 -0000
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--- Comment #8 from Thiago Macieira <thiago at kde dot org> ---
(In reply to Peter Cordes from comment #7)
> 8B alignment is required for 8B objects to be efficiently lock-free (using
> SSE load / store for .load() and .store(), see
> https://stackoverflow.com/questions/36624881/why-is-integer-assignment-on-a-
> naturally-aligned-variable-atomic), and to avoid a factor of ~100 slowdown
> if lock cmpxchg8b is split across a cache-line boundary.
Unfortunately, the issue is not efficiency, but compatibility. The change broke
ABI for roughly 50% of structs containing atomic<64bit>. I understand being
fast, but not at the expense of silently breaking code at runtime.
> alignof(long double) in 32-bit is different from alignof(long double) in
> 64-bit. std::atomic<long double> or _Atomic long double should always have
> the same alignment as long double.
In and out of structs? That's the whole problem: inside structs, the alignment
is 4 for historical reasons.
>From gcc-bugs-return-574344-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 14:44:54 2017
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From: "asb at lowrisc dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82106] New: [RISCV] Misaligned loads generated when doubles are split between stack and registers
Date: Tue, 05 Sep 2017 14:44:00 -0000
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Bug ID: 82106
Summary: [RISCV] Misaligned loads generated when doubles are
split between stack and registers
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
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Reporter: asb at lowrisc dot org
Target Milestone: ---
Created attachment 42127
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42127&action=edit
Simple program to reproduce this problem
When targeting RISC-V, GCC will allocate space on the stack for values which
are split between argument registers and the stack. If the type has alignment
larger than xlen, it is possible for misaligned loads to be generated. This can
be observed when passing a double in the attached example. The below is
generated using GCC r251714.
$ cat call.c
typedef long long int int64_t;
struct large_struct { int64_t h1; int64_t h2; };
void fun_float(float);
void fun_double(double);
void fun_int64(int64_t);
void callee(float fa0, float fa1, float fa2, float fa3, float fa4, float fa5,
float fa6, float fa7, int a0, int a1, int a2, int a3, int a4, int a5, int
a6, double a7_s0, int64_t s1, float s2, struct large_struct s3) {
fun_double(a7_s0);
fun_int64(s1);
fun_float(s2);
fun_int64(s3.h1);
fun_int64(s3.h2);
return;
}
/riscv32-unknown-elf-gcc -v -c call.c -march=rv32ifd -mabi=ilp32d -O1
-fno-omit-frame-pointer -S -o -Using built-in specs.
COLLECT_GCC=./riscv32-unknown-elf-gcc
Target: riscv32-unknown-elf
Configured with: ../configure --target=riscv32-unknown-elf --enable-languages=c
--disable-shared --disable-threads --disable-multilib --disable-gdb
--disable-libssp --with-newlib --with-arch=rv32ima --with-abi=ilp32
--prefix=/home/asb/work/2017_09_05_gcc_build/combined/build/built
Thread model: single
gcc version 8.0.0 20170905 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-v' '-c' '-march=rv32ifd' '-mabi=ilp32d' '-O1'
'-fno-omit-frame-pointer' '-S' '-o' '-'
/home/asb/work/2017_09_05_gcc_build/combined/build/built/libexec/gcc/riscv32-unknown-elf/8.0.0/cc1
-quiet -v call.c -quiet -dumpbase call.c -march=rv32ifd -mabi=ilp32d
-auxbase-strip - -O1 -version -fno-omit-frame-pointer -o -
GNU C11 (GCC) version 8.0.0 20170905 (experimental) (riscv32-unknown-elf)
compiled by GNU C version 7.1.1 20170630, GMP version 6.1.2, MPFR
version 3.1.5-p2, MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
ignoring nonexistent directory
"/home/asb/work/2017_09_05_gcc_build/combined/build/built/lib/gcc/riscv32-unknown-elf/8.0.0/../../../../riscv32-unknown-elf/sys-include"
#include "..." search starts here:
#include <...> search starts here:
/home/asb/work/2017_09_05_gcc_build/combined/build/built/lib/gcc/riscv32-unknown-elf/8.0.0/include
/home/asb/work/2017_09_05_gcc_build/combined/build/built/lib/gcc/riscv32-unknown-elf/8.0.0/include-fixed
/home/asb/work/2017_09_05_gcc_build/combined/build/built/lib/gcc/riscv32-unknown-elf/8.0.0/../../../../riscv32-unknown-elf/include
End of search list.
GNU C11 (GCC) version 8.0.0 20170905 (experimental) (riscv32-unknown-elf)
compiled by GNU C version 7.1.1 20170630, GMP version 6.1.2, MPFR
version 3.1.5-p2, MPC version 1.0.3, isl version none
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 82d1950b419a8e1b72499dc8b233dd66
.file "call.c"
.option nopic
.text
.align 2
.globl callee
.type callee, @function
callee:
add sp,sp,-32
sw ra,12(sp)
sw s0,8(sp)
sw s1,4(sp)
add s0,sp,16
sw a7,12(s0)
lw s1,36(s0)
fld fa0,12(s0)
call fun_double
lw a0,24(s0)
lw a1,28(s0)
call fun_int64
flw fa0,32(s0)
call fun_float
lw a0,0(s1)
lw a1,4(s1)
call fun_int64
lw a0,8(s1)
lw a1,12(s1)
call fun_int64
lw ra,12(sp)
lw s0,8(sp)
lw s1,4(sp)
add sp,sp,32
jr ra
.size callee, .-callee
.ident "GCC: (GNU) 8.0.0 20170905 (experimental)"
COMPILER_PATH=/home/asb/work/2017_09_05_gcc_build/combined/build/built/libexec/gcc/riscv32-unknown-elf/8.0.0/:/home/asb/work/2017_09_05_gcc_build/combined/build/built/libexec/gcc/riscv32-unknown-elf/8.0.0/:/home/asb/work/2017_09_05_gcc_build/combined/build/built/libexec/gcc/riscv32-unknown-elf/:/home/asb/work/2017_09_05_gcc_build/combined/build/built/lib/gcc/riscv32-unknown-elf/8.0.0/:/home/asb/work/2017_09_05_gcc_build/combined/build/built/lib/gcc/riscv32-unknown-elf/:/home/asb/work/2017_09_05_gcc_build/combined/build/built/lib/gcc/riscv32-unknown-elf/8.0.0/../../../../riscv32-unknown-elf/bin/
LIBRARY_PATH=/home/asb/work/2017_09_05_gcc_build/combined/build/built/lib/gcc/riscv32-unknown-elf/8.0.0/:/home/asb/work/2017_09_05_gcc_build/combined/build/built/lib/gcc/riscv32-unknown-elf/8.0.0/../../../../riscv32-unknown-elf/lib/:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-c' '-march=rv32ifd' '-mabi=ilp32d' '-O1'
'-fno-omit-frame-pointer' '-S' '-o' '-'
`fld fa0,12(s0)` is using a misaligned stack address. Although this should
work, the compiler should avoid generating misaligned accesses where possible
as they may be trigger an exception and an emulation routine.
>From gcc-bugs-return-574345-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 14:56:46 2017
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Subject: [Bug target/65146] alignment of _Atomic structure member is not correct
Date: Tue, 05 Sep 2017 14:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65146
--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
We need to first decide what we want out of i386 atomic.
Please send a post to
https://groups.google.com/forum/#!forum/ia32-abi
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From: "ian at airs dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug go/82043] error: redefinition of ...
Date: Tue, 05 Sep 2017 15:13:00 -0000
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--- Comment #7 from Ian Lance Taylor <ian at airs dot com> ---
Sorry, I'm not sure what is causing that error.
Why don't you just compile GCC trunk?
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82105] unexpected padding in a struct
Date: Tue, 05 Sep 2017 15:29:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
I combined these all into a single testcase:
$ cat 82105.c
typedef struct {
unsigned int x:16;
unsigned int y:17;
unsigned short z0; /* -Wpadded 1 */
} XXX; /* -Wpadded 2 */
typedef struct __attribute__((packed,aligned(4))) {
unsigned int x:16;
unsigned int y:17;
unsigned short z1; /* -Wpadded 3 */
} XXY; /* -Wpadded 4 */
typedef struct {
unsigned int x:1;
unsigned int y:1;
unsigned short z2; /* -Wpadded 5 */
} XYX; /* silent, good */
typedef struct {
unsigned int x:16;
unsigned int y:16;
unsigned short z3; /* silent, good */
} XYY; /* -Wpadded 6 */
$ /usr/local/bin/gcc -c -Wall -Wextra -pedantic -Wpadded -Wpacked -O2 82105.c
82105.c:4:17: warning: padding struct to align ‘z0’ [-Wpadded]
unsigned short z0; /* -Wpadded 1 */
^~
82105.c:5:1: warning: padding struct size to alignment boundary [-Wpadded]
} XXX; /* -Wpadded 2 */
^
82105.c:10:20: warning: padding struct to align ‘z1’ [-Wpadded]
unsigned short z1; /* -Wpadded 3 */
^~
82105.c:11:1: warning: padding struct size to alignment boundary [-Wpadded]
} XXY; /* -Wpadded 4 */
^
82105.c:16:17: warning: padding struct to align ‘z2’ [-Wpadded]
unsigned short z2; /* -Wpadded 5 */
^~
82105.c:23:1: warning: padding struct size to alignment boundary [-Wpadded]
} XYY; /* -Wpadded 6 */
^
$
(In reply to Richard Biener from comment #1)
> This is how bitfields work. You can use
>
> typedef struct __attribute__((packed,aligned(4))) {
> unsigned int x:16;
> unsigned int y:17;
> unsigned short z;
> } XXX;
>
> to get what you want.
It still prints -Wpadded warnings despite the attributes though.
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Subject: [Bug c++/64867] warning for passing non-POD to varargs function
Date: Tue, 05 Sep 2017 15:37:00 -0000
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--- Comment #19 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Whether Clang warns or not depends on the -std mode active, as that decides the
definition of a POD it uses. GCC always uses the C++11 rule, which I quoted in
comment 9.
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Subject: [Bug libstdc++/71660] [5/6/7/8 regression] alignment of std::atomic<8 byte primitive type> (long long, double) is wrong on x86
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H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl.tools at gmail dot com
Depends on| |65146
--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
This is related to PR 65146.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65146
[Bug 65146] alignment of _Atomic structure member is not correct
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Subject: [Bug c++/82080] ICE: Segmentation fault
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Created attachment 42128
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42128&action=edit
error messages printed when trying to compile
I can't reproduce this bug on i386-apple-darwin9.8.0; with -m32 I get a bunch
of normal errors (attached because the output is really long), but no ICEs.
With -m64 I get no messages at all and the compile completes successfully. I'll
leave this for someone with the same platform as you to try to reproduce.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/82072] sanitizer does not detect an overflow from LLONG_MIN
Date: Tue, 05 Sep 2017 15:55:00 -0000
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--- Comment #16 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Sep 5 15:55:04 2017
New Revision: 251717
URL: https://gcc.gnu.org/viewcvs?rev=251717&root=gcc&view=rev
Log:
PR sanitizer/82072
* convert.c (convert_to_integer_1) <case NEGATE_EXPR>: Move the ubsan
check earlier.
* c-c++-common/ubsan/pr82072-2.c: New test.
Added:
trunk/gcc/testsuite/c-c++-common/ubsan/pr82072-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/convert.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/82075] structured binding fails with empty base class
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-05
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirmed that gcc errors on the example.
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Subject: [Bug sanitizer/82072] sanitizer does not detect an overflow from LLONG_MIN
Date: Tue, 05 Sep 2017 15:56:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/82072] sanitizer does not detect an overflow from LLONG_MIN
Date: Tue, 05 Sep 2017 15:56:00 -0000
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #17 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug tree-optimization/82073] internal compiler error: in pop_to_marker, at tree-ssa-scopedtables.c
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Could you post the output of g++ -v so we have version and target info please?
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From: "loquens at yandex dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82107] New: O2 optimisation on amd64 leads to error
Date: Tue, 05 Sep 2017 16:05:00 -0000
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Bug ID: 82107
Summary: O2 optimisation on amd64 leads to error
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: loquens at yandex dot ru
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Created attachment 42129
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42129&action=edit
full error example sources
Complete source code attached.
Steps to reproduce this bug in amd64-environment:
* extract archive contents
* enter directory optfail
* call make
* run ./optimization_fail - program will hang
Please see comments marked "IMPORTANT" in sources and Makefile. All theese
notes change behaviour (error dissapears).
Originally found on GCC-6.3.0 compiled from sources, but 7.0.1 (from Ubuntu
17.04 repos, full version shown below) and 7.2.0 (compiled from sources, same
flags as 6.3.0, shown below) also produce error.
$ lsb_release -a
LSB Version:
core-9.20160110ubuntu5-amd64:core-9.20160110ubuntu5-noarch:security-9.20160110ubuntu5-amd64:security-9.20160110ubuntu5-noarch
Distributor ID: Ubuntu
Description: Ubuntu 17.04
Release: 17.04
Codename: zesty
$ g++ --version
g++ (Ubuntu 7-20170407-0ubuntu2) 7.0.1 20170407 (experimental) [trunk revision
246759]
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
gcc-7.2.0 compilation flags:
./configure --disable-cloog-version-check \
--disable-ppl-version-check --enable-cloog-backend=isl \
--enable-gold --enable-languages=c,c++ --enable-lto --enable-libssp \
--prefix=/install/prefix --with-cloog=/install/prefix \
--with-gmp=/install/prefix --with-mlgmp=/install/prefix \
--with-mpc=/install/prefix --with-mpfr=/install/prefix \
--with-ppl=/install/prefix
With best regards,
loquens
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From: "loquens at yandex dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/82107] O2 optimisation on amd64 leads to error
Date: Tue, 05 Sep 2017 16:07:00 -0000
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--- Comment #1 from loquens at yandex dot ru ---
Additional research found, that error produced by
-O1 and -finline-small-functions -fipa-icf -foptimize-sibling-calls.
All three flags must be present to get an error.
If you exclude -foptimize-sibling-calls, you'll get an stack overflow.
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From: "palmer at dabbelt dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82106] [RISCV] Misaligned loads generated when doubles are split between stack and registers
Date: Tue, 05 Sep 2017 16:16:00 -0000
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--- Comment #1 from Palmer Dabbelt <palmer at dabbelt dot com> ---
Ugh. I'd really like to call this a bug and fix it, but since it'll
technically break the ABI it'll require some more thought.
Does "-mstrict-align" change the behavior? That would be a good argument to
fix the bug :).
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From: "asb at lowrisc dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82106] [RISCV] Misaligned loads generated when doubles are split between stack and registers
Date: Tue, 05 Sep 2017 16:26:00 -0000
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--- Comment #2 from Alex Bradbury <asb at lowrisc dot org> ---
Same problem with `-mstrict-align`, which as you say makes this worse.
I'm actually not sure if this is an ABI-visible issue. The vararg save area and
it's location is basically required by the ABI due to the dual restrictions of
1) keeping saved fp and ra at consistent offsets to s0, and 2) ensure that
argument registers are contiguous with arguments passed via the stack. I might
be missing something obvious, but I'm not seeing any similar restrictions that
enforce the use of a save area for arguments split between the stack and a
register. I posted to RISC-V sw-dev for another opinion on this
<https://groups.google.com/a/groups.riscv.org/d/msg/sw-dev/SsO9Dq7wooI/OioZNHUAAwAJ>.
It's very possible I'm missing something obvious of course.
Assuming I'm not missing anything, I don't think it would be ABI-visible to
change gcc so it reconstructs the split argument as a local in a
properly-aligned stack location.
>From gcc-bugs-return-574360-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 16:29:51 2017
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From: "vsevolod.livinskij at frtk dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82073] internal compiler error: in pop_to_marker, at tree-ssa-scopedtables.c
Date: Tue, 05 Sep 2017 16:29:00 -0000
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--- Comment #2 from Vsevolod Livinskiy <vsevolod.livinskij at frtk dot ru> ---
(In reply to Eric Gallager from comment #1)
> Could you post the output of g++ -v so we have version and target info
> please?
Revision is 251589
>$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /gcc-dev/bin-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170901 (experimental) (GCC)
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From: "ell_se at yahoo dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82108] New: [7.2 Regression] Wrong vectorized code generated for x86_64
Date: Tue, 05 Sep 2017 16:32:00 -0000
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Bug ID: 82108
Summary: [7.2 Regression] Wrong vectorized code generated for
x86_64
Product: gcc
Version: 7.2.0
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The following snippet generates wrong vectorized code with GCC 7.2 on x86_64
with -O3:
void downscale_2 (const float* src, int src_n, float* dst) {
int i;
for (i = 0; i < src_n; i += 2) {
const float* a = src;
const float* b = src + 4;
dst[0] = (a[0] + b[0]) / 2;
dst[1] = (a[1] + b[1]) / 2;
dst[2] = (a[2] + b[2]) / 2;
dst[3] = (a[3] + b[3]) / 2;
src += 2 * 4;
dst += 4;
}
The assembly for the vectorized version of the loop is:
.L5:
addl $1, %ecx
movups (%rdi,%rax), %xmm0
movups 16(%rdi,%rax,2), %xmm2
addps %xmm2, %xmm0
mulps %xmm1, %xmm0
movups %xmm0, (%rdx,%rax)
addq $16, %rax
cmpl %r8d, %ecx
jb .L5
Notice the missing ,2 on the first movups.
It can be tested with:
#include <stdio.h>
int main () {
const float in[4 * 4] = {
1, 2, 3, 4,
5, 6, 7, 8,
1, 2, 3, 4,
5, 6, 7, 8
};
float out[2 * 4];
downscale_2 (in, 4, out);
/* correct: 3, 4, 5, 6 */
printf ("%g, %g, %g, %g\n", out[0], out[1], out[2], out[3]);
/* incorrect: 5, 6, 7, 8; should also be 3, 4, 5, 6 */
printf ("%g, %g, %g, %g\n", out[4], out[5], out[6], out[7]);
}
This doesn't seem to happen with 7.1 or 6.3.
For a chuckle, this affects a recent build of GIMP, and has resulted in this
beauty:
https://bug787222.bugzilla-attachments.gnome.org/attachment.cgi?id=359042 :)
$gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --disable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
Thread model: posix
gcc version 7.2.0 (GCC)
>From gcc-bugs-return-574361-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 16:32:21 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/81787] [5/6/7/8 Regression] `#pragma GCC diagnostic warning "-fpermissive"` no longer works since gcc 4.8
Date: Tue, 05 Sep 2017 16:32:00 -0000
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--- Comment #6 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> (In reply to Manuel López-Ibáñez from comment #2)
> > My personal opinion is that we should instead have -Wpermissive, which
> > defaults to -Werror=permissive and works like any other -W* option should
> > (and would work with #pragma). -fpermissive can then become an alias for
> > -Wpermissive, like I did with -pedantic -> -Wpedantic.
>
> No no no no. It's not a warning option.
As far as I know, it is currently just an option controlling the type of
diagnostics, it doesn't change the meaning of the code. It doesn't change the
language. The doc just says:
Downgrade some diagnostics about nonconformant code from errors to warnings.
Thus, using -fpermissive allows some nonconforming code to compile.
Preventing users from downgrading the errors to warnings (or disabling them
completely) in specific parts of the code is just going to annoy people, as the
SO posts show.
>From gcc-bugs-return-574364-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 16:40:05 2017
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Subject: [Bug target/81769] Unnecessary stack realign with -mavx
Date: Tue, 05 Sep 2017 16:40:00 -0000
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--- Comment #1 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Sep 5 16:39:24 2017
New Revision: 251718
URL: https://gcc.gnu.org/viewcvs?rev=251718&root=gcc&view=rev
Log:
i386: Avoid stack realignment if possible
ix86_finalize_stack_frame_flags has been extended to eliminate frame
pointer when the new stack frame isn't needed with and without
-maccumulate-outgoing-args as well as -fomit-frame-pointer. Since stack
access with larger alignment may be optimized out, to decide if stack
realignment is needed, we need to not only check for stack frame access,
but also verify the alignment of stack frame access. Since alignment of
memory access via arg_pointer is set up by caller, not by callee, we
should find the maximum stack alignment from the stack frame access
instructions via stack pointer and frame pointrer to avoid stack
realignment when stack alignment needed is less than incoming stack
boundary.
gcc/
PR target/59501
PR target/81624
PR target/81769
* config/i386/i386.c (ix86_finalize_stack_frame_flags): Don't
realign stack if stack alignment needed is less than incoming
stack boundary.
gcc/testsuite/
PR target/59501
PR target/81624
PR target/81769
* gcc.target/i386/pr59501-4a.c: Remove xfail.
* gcc.target/i386/pr81769-1a.c: New test.
* gcc.target/i386/pr81769-1b.c: Likewise.
* gcc.target/i386/pr81769-2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr81769-1a.c
trunk/gcc/testsuite/gcc.target/i386/pr81769-1b.c
trunk/gcc/testsuite/gcc.target/i386/pr81769-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr59501-4a.c
>From gcc-bugs-return-574365-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 16:40:05 2017
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Subject: [Bug testsuite/81624] [8 Regression] FAIL: gcc.target/i386/pr59501-3a.c scan-assembler-not and[^\n\r]*sp
Date: Tue, 05 Sep 2017 16:40:00 -0000
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--- Comment #3 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Sep 5 16:39:24 2017
New Revision: 251718
URL: https://gcc.gnu.org/viewcvs?rev=251718&root=gcc&view=rev
Log:
i386: Avoid stack realignment if possible
ix86_finalize_stack_frame_flags has been extended to eliminate frame
pointer when the new stack frame isn't needed with and without
-maccumulate-outgoing-args as well as -fomit-frame-pointer. Since stack
access with larger alignment may be optimized out, to decide if stack
realignment is needed, we need to not only check for stack frame access,
but also verify the alignment of stack frame access. Since alignment of
memory access via arg_pointer is set up by caller, not by callee, we
should find the maximum stack alignment from the stack frame access
instructions via stack pointer and frame pointrer to avoid stack
realignment when stack alignment needed is less than incoming stack
boundary.
gcc/
PR target/59501
PR target/81624
PR target/81769
* config/i386/i386.c (ix86_finalize_stack_frame_flags): Don't
realign stack if stack alignment needed is less than incoming
stack boundary.
gcc/testsuite/
PR target/59501
PR target/81624
PR target/81769
* gcc.target/i386/pr59501-4a.c: Remove xfail.
* gcc.target/i386/pr81769-1a.c: New test.
* gcc.target/i386/pr81769-1b.c: Likewise.
* gcc.target/i386/pr81769-2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr81769-1a.c
trunk/gcc/testsuite/gcc.target/i386/pr81769-1b.c
trunk/gcc/testsuite/gcc.target/i386/pr81769-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr59501-4a.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/59501] [4.9 Regression] Vector Gather with GCC 4.9 2013-12-08 Snapshot
Date: Tue, 05 Sep 2017 16:40:00 -0000
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--- Comment #7 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Sep 5 16:39:24 2017
New Revision: 251718
URL: https://gcc.gnu.org/viewcvs?rev=251718&root=gcc&view=rev
Log:
i386: Avoid stack realignment if possible
ix86_finalize_stack_frame_flags has been extended to eliminate frame
pointer when the new stack frame isn't needed with and without
-maccumulate-outgoing-args as well as -fomit-frame-pointer. Since stack
access with larger alignment may be optimized out, to decide if stack
realignment is needed, we need to not only check for stack frame access,
but also verify the alignment of stack frame access. Since alignment of
memory access via arg_pointer is set up by caller, not by callee, we
should find the maximum stack alignment from the stack frame access
instructions via stack pointer and frame pointrer to avoid stack
realignment when stack alignment needed is less than incoming stack
boundary.
gcc/
PR target/59501
PR target/81624
PR target/81769
* config/i386/i386.c (ix86_finalize_stack_frame_flags): Don't
realign stack if stack alignment needed is less than incoming
stack boundary.
gcc/testsuite/
PR target/59501
PR target/81624
PR target/81769
* gcc.target/i386/pr59501-4a.c: Remove xfail.
* gcc.target/i386/pr81769-1a.c: New test.
* gcc.target/i386/pr81769-1b.c: Likewise.
* gcc.target/i386/pr81769-2.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr81769-1a.c
trunk/gcc/testsuite/gcc.target/i386/pr81769-1b.c
trunk/gcc/testsuite/gcc.target/i386/pr81769-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.target/i386/pr59501-4a.c
>From gcc-bugs-return-574366-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 16:44:14 2017
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80925] [8 Regression] vect peeling failures
Date: Tue, 05 Sep 2017 16:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80925
Christophe Lyon <clyon at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #21 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to Steve Ellcey from comment #19)
> Author: sje
> Date: Mon Jul 31 21:44:34 2017
> New Revision: 250752
>
> URL: https://gcc.gnu.org/viewcvs?rev=250752&root=gcc&view=rev
> Log:
> 2017-07-31 Steve Ellcey <sellcey@cavium.com>
>
> PR tree-optimization/80925
> * gcc.dg/vect/no-section-anchors-vect-69.c: Add
> --param vect-max-peeling-for-alignment=0 option.
> Remove unaligned access and peeling checks.
> * gcc.dg/vect/section-anchors-vect-69.c: Ditto.
>
> Modified:
> trunk/gcc/testsuite/ChangeLog
> trunk/gcc/testsuite/gcc.dg/vect/no-section-anchors-vect-69.c
> trunk/gcc/testsuite/gcc.dg/vect/section-anchors-vect-69.c
I think this change caused regressions on armeb-none-linux-gnueabihf
--with-cpu=cortex-a9 --with-fpu=neon-fp16 (works OK --with-fpu=vfpv3-d16-fp16)
>From gcc-bugs-return-574367-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 17:06:42 2017
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From: "thiago at kde dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/71660] [5/6/7/8 regression] alignment of std::atomic<8 byte primitive type> (long long, double) is wrong on x86
Date: Tue, 05 Sep 2017 17:06:00 -0000
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--- Comment #10 from Thiago Macieira <thiago at kde dot org> ---
Actually, PR 65146 points out that the problem is not efficiency but
correctness. An under-aligned type could cross a cacheline boundary and thus
fail to be atomic in the first place.
Therefore, it is correct to increase the alignment, even if that causes an ABI
change for existing structures. Those structures were disasters waiting to
happen.
I withdraw my bug report. Close it as INVALID or NOTABUG or whatever is
appropriate.
>From gcc-bugs-return-574368-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 17:14:50 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/81787] [5/6/7/8 Regression] `#pragma GCC diagnostic warning "-fpermissive"` no longer works since gcc 4.8
Date: Tue, 05 Sep 2017 17:14:00 -0000
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Accepting invalid C++ changes the language. It's not a diagnostic option, it's
closer to -std in meaning.
>From gcc-bugs-return-574369-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 17:22:50 2017
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From: "dudu.arbel at ilrd dot co.il" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82105] unexpected padding in a struct
Date: Tue, 05 Sep 2017 17:22:00 -0000
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--- Comment #6 from Dudu <dudu.arbel at ilrd dot co.il> ---
Thanks for the replies, but I do not look to workaround this issue.
I simply wonder why gcc behaves as it does on this case.
This behavior breaks my understanding of padding.
This behavior seems wrong.
This behavior looks like a bug.
If this behavior is expected - can anyone explain it to me?
>From gcc-bugs-return-574370-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 17:36:33 2017
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From: "jamrial at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/82080] ICE: Segmentation fault
Date: Tue, 05 Sep 2017 17:36:00 -0000
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James Almer <jamrial at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #42105|0 |1
is obsolete| |
--- Comment #2 from James Almer <jamrial at gmail dot com> ---
Created attachment 42130
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42130&action=edit
Preprocessed output created with -freport-bug
This one should have no warning spam about missing builtins. The original
preprocessed output was created with -march=native.
Still ICEs for me on an x86_64 ArchLinux host.
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82108] [7/8 Regression] Wrong vectorized code generated for x86_64
Date: Tue, 05 Sep 2017 18:02:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Known to work| |6.4.0, 7.1.0
Keywords| |wrong-code
Last reconfirmed| |2017-09-05
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Summary|[7.2 Regression] Wrong |[7/8 Regression] Wrong
|vectorized code generated |vectorized code generated
|for x86_64 |for x86_64
Target Milestone|--- |7.3
Known to fail| |7.2.0, 8.0
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r250312.
>From gcc-bugs-return-574372-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 18:03:31 2017
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Subject: [Bug c/82063] issues with arguments enabled by -Wall
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--- Comment #5 from Jim Wilson <wilson at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #3)
> Jim, since you've spent some time on this already and understand the
> problems, please feel to propose a patch. If you don't get to it I'll see
> if I can find the time to fix at least some of these problems in stage 3.
My current project makes contributing complicated. I will write a patch when I
have a chance, but it may be a little while.
>From gcc-bugs-return-574373-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 18:08:29 2017
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From: "andrew at sifive dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82106] [RISCV] Misaligned loads generated when doubles are split between stack and registers
Date: Tue, 05 Sep 2017 18:08:00 -0000
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--- Comment #3 from Andrew Waterman <andrew at sifive dot com> ---
I believe Alex is correct, in that this is an implementation artifact that
can be fixed without breaking the ABI.
On Tue, Sep 5, 2017 at 9:26 AM asb at lowrisc dot org <
gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82106
>
> --- Comment #2 from Alex Bradbury <asb at lowrisc dot org> ---
> Same problem with `-mstrict-align`, which as you say makes this worse.
>
> I'm actually not sure if this is an ABI-visible issue. The vararg save
> area and
> it's location is basically required by the ABI due to the dual
> restrictions of
> 1) keeping saved fp and ra at consistent offsets to s0, and 2) ensure that
> argument registers are contiguous with arguments passed via the stack. I
> might
> be missing something obvious, but I'm not seeing any similar restrictions
> that
> enforce the use of a save area for arguments split between the stack and a
> register. I posted to RISC-V sw-dev for another opinion on this
> <
> https://groups.google.com/a/groups.riscv.org/d/msg/sw-dev/SsO9Dq7wooI/OioZNHUAAwAJ
> >.
> It's very possible I'm missing something obvious of course.
>
> Assuming I'm not missing anything, I don't think it would be ABI-visible to
> change gcc so it reconstructs the split argument as a local in a
> properly-aligned stack location.
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Subject: [Bug c++/82107] [5/6/7/8 Regression] O2 optimisation on amd64 leads to error
Date: Tue, 05 Sep 2017 18:15:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82107
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Keywords| |wrong-code
Last reconfirmed| |2017-09-05
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
Summary|O2 optimisation on amd64 |[5/6/7/8 Regression] O2
|leads to error |optimisation on amd64 leads
| |to error
Target Milestone|--- |8.0
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r221406, which is IPA ICF related revision.
ICF is responsible for following merge:
void FooBase<T>::payload(std::__cxx11::wstring&, std::__cxx11::wstring&) [with
T = FooImpl] (struct FooBase * const this, struct wstring & result1, struct
wstring & result2)
{
<bb 2> [100.00%]:
std::__cxx11::basic_string<wchar_t>::assign (result1_3(D), "r");
std::__cxx11::basic_string<wchar_t>::assign (result2_4(D), "r");
return;
}
void FooImpl::real_payload(std::__cxx11::wstring&, std::__cxx11::wstring&)
(struct FooImpl * const this, struct wstring & result1, struct wstring &
result2)
{
<bb 2> [100.00%]:
std::__cxx11::basic_string<wchar_t>::assign (result1_2(D), "r");
std::__cxx11::basic_string<wchar_t>::assign (result2_3(D), "r");
return;
}
Which should be fine as both functions do not touch this pointer. I'll
investigate more tomorrow.
Sorry for the breakage.
>From gcc-bugs-return-574375-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 18:25:27 2017
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82064] [7/8 Regression] [OOP] multiple incompatible definitions of extended derived type via module use
Date: Tue, 05 Sep 2017 18:25:00 -0000
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--- Comment #5 from janus at gcc dot gnu.org ---
(In reply to Paul Thomas from comment #4)
> (In reply to janus from comment #3)
> > It appears that the regression has been introduced by r241450, which was the
> > fix for PR 69834. Reverting it, in particular the changes to
> > resolve_select_type, makes the error go away.
>
> Strangely, my GNU Fortran (GCC) 8.0.0 20170830 gives me two "OK"s :-)
Also on the version with separate files?
> That said, this is a repeat of another recent bug (sorry, I am rushing off
> to work - no time to find the number). I posted a work around, which
> translates in this case to:
>
> [..]
>
> The permanent fix is to make sure that the vtables get produced
> unconditionally for module derived types.
I thought we already did that, but probably we're still missing some cases?
>From gcc-bugs-return-574376-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 18:30:34 2017
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Subject: [Bug libstdc++/78015] pthread_cancel while some exception is pending results in std::terminate ()
Date: Tue, 05 Sep 2017 18:30:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
No, but I'm not familiar enough with the C++ EH libsupc++ stuff to write it
myself. Jason, do you think you could try that?
>From gcc-bugs-return-574377-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 18:36:45 2017
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Subject: [Bug target/82106] [RISCV] Misaligned loads generated when doubles are split between stack and registers
Date: Tue, 05 Sep 2017 18:36:00 -0000
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--- Comment #4 from Palmer Dabbelt <palmer at dabbelt dot com> ---
Ya, sorry, I misread the assembly.
>From gcc-bugs-return-574378-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 18:40:32 2017
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Subject: [Bug libstdc++/78015] pthread_cancel while some exception is pending results in std::terminate ()
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #0)
> fails with std::terminate (), while works with -DWORKAROUND.
It's the other way around, right? Was the testcase meant to use #ifndef?
I can take a look at wrapping the non-C++ exception. Do we want to do that for
all foreign exceptions, or just __forced_unwind?
>From gcc-bugs-return-574379-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 19:03:06 2017
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Subject: [Bug libstdc++/78015] pthread_cancel while some exception is pending results in std::terminate ()
Date: Tue, 05 Sep 2017 19:03:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> (In reply to Jakub Jelinek from comment #0)
> > fails with std::terminate (), while works with -DWORKAROUND.
>
> It's the other way around, right? Was the testcase meant to use #ifndef?
Yes, see #c2.
> I can take a look at wrapping the non-C++ exception. Do we want to do that
> for all foreign exceptions, or just __forced_unwind?
Dunno.
>From gcc-bugs-return-574380-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 19:18:55 2017
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Subject: [Bug sanitizer/82109] New: False positive when using pthread_cleanup_push() and pthread_cancel()
Date: Tue, 05 Sep 2017 19:18:00 -0000
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Bug ID: 82109
Summary: False positive when using pthread_cleanup_push() and
pthread_cancel()
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: mephi42 at gmail dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Created attachment 42131
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42131&action=edit
minimal reproducible example
The attached program generates what I believe is a false positive:
WRITE of size 4096 thread T1
#1 in cleanup_routine (asan_pthread_cancel)
#2 in start_routine (asan_pthread_cancel)
#3 in start_thread (libpthread.so)
#4 in __clone (libc.so)
The reason seems to be that ASAN does not zero out shadow memory bytes set by
sleep_routine() when pthread_cancel() is called, which then overlap text
variable in cleanup_routine().
>From gcc-bugs-return-574381-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 19:42:35 2017
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Subject: [Bug target/81833] [7/8 Regression] PowerPC: VSX: Miscompiles ffmpeg's scalarproduct_int16_vsx at -O1
Date: Tue, 05 Sep 2017 19:42:00 -0000
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--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Tue Sep 5 19:41:55 2017
New Revision: 251723
URL: https://gcc.gnu.org/viewcvs?rev=251723&root=gcc&view=rev
Log:
[gcc]
2017-09-05 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/81833
* config/rs6000/altivec.md (altivec_vsum2sws): Convert from a
define_insn to a define_expand.
(altivec_vsum2sws_direct): New define_insn.
(altivec_vsumsws): Convert from a define_insn to a define_expand.
[gcc/testsuite]
2017-09-05 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/81833
* gcc.target/powerpc/pr81833-1.c: New file.
* gcc.target/powerpc/pr81833-2.c: New file.
Added:
trunk/gcc/testsuite/gcc.target/powerpc/pr81833-1.c
trunk/gcc/testsuite/gcc.target/powerpc/pr81833-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/altivec.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/82053] [8 Regression] ICE on invalid code
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-09-05
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-574383-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 21:12:12 2017
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Subject: [Bug middle-end/82095] [8 Regression] ICE in tree_nop_conversion at tree.c:11793 on ppc64le
Date: Tue, 05 Sep 2017 21:12:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
Summary|ICE in tree_nop_conversion |[8 Regression] ICE in
|at tree.c:11793 on ppc64le |tree_nop_conversion at
| |tree.c:11793 on ppc64le
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r251602.
>From gcc-bugs-return-574384-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 21:32:13 2017
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From: "peter at cordes dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/71660] [5/6/7/8 regression] alignment of std::atomic<8 byte primitive type> (long long, double) is wrong on x86
Date: Tue, 05 Sep 2017 21:32:00 -0000
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--- Comment #11 from Peter Cordes <peter at cordes dot ca> ---
(In reply to Thiago Macieira from comment #10)
> Actually, PR 65146 points out that the problem is not efficiency but
> correctness. An under-aligned type could cross a cacheline boundary and thus
> fail to be atomic in the first place.
As I pointed out there, you technically could solve the correctness problem by
checking alignment and falling back to locking for objects where a plain 8B
load or 8B store wouldn't be atomic. That's what I meant by "efficiently
lock-free". And we're talking about *huge* inefficiencies here compared to
always being able to inline and SSE load/store.
That would let you keep struct layouts the same, but it would still be an ABI
change, since everything has to agree about which objects are lock-free and
which aren't. Now that I think about it, all of my suggested fixes on PR 65146
are effectively ABI changes.
> Those structures were disasters waiting to happen.
Yes, exactly.
Basically any existing binaries compiled with a gcc that allows under-aligned
atomic objects are unsafe, so keeping compatibility with them is not important.
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Subject: [Bug middle-end/81768] [8 Regression] error: control flow in the middle of basic block
Date: Tue, 05 Sep 2017 21:32:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Sep 5 21:31:39 2017
New Revision: 251741
URL: https://gcc.gnu.org/viewcvs?rev=251741&root=gcc&view=rev
Log:
PR middle-end/81768
* omp-expand.c (expand_omp_simd): Force second operands of COND_EXPR
into gimple val before gimplification fo the COND_EXPR.
* gcc.dg/gomp/pr81768-1.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/gomp/pr81768-1.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/omp-expand.c
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/81768] [8 Regression] error: control flow in the middle of basic block
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Sep 5 21:32:35 2017
New Revision: 251742
URL: https://gcc.gnu.org/viewcvs?rev=251742&root=gcc&view=rev
Log:
PR middle-end/81768
* omp-low.c (lower_omp_for): Recompute tree invariant if
gimple_omp_for_initial/final is ADDR_EXPR.
* gcc.dg/gomp/pr81768-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/gomp/pr81768-2.c
Modified:
trunk/gcc/ChangeLog
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>From gcc-bugs-return-574387-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 21:34:38 2017
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From: "aaro.koskinen at iki dot fi" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82048] GCC bootstrap fails in stage1 on sparc-unknown-linux-gnu
Date: Tue, 05 Sep 2017 21:34:00 -0000
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--- Comment #5 from Aaro Koskinen <aaro.koskinen at iki dot fi> ---
> Is there any workaround other than downgrading to glibc 2.24 on SPARC?
If you always re-install the 64-bit glibc build after 32-bit one, that should
restore the correct version of long-double.h.
>From gcc-bugs-return-574388-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 21:45:59 2017
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From: "peter at cordes dot ca" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/65146] alignment of _Atomic structure member is not correct
Date: Tue, 05 Sep 2017 21:45:00 -0000
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--- Comment #8 from Peter Cordes <peter at cordes dot ca> ---
BTW, all of my proposals are really ABI changes, even if struct layout stays
the same.
All code has to agree on which objects are lock-free or not, and whether they
need to check alignment before using an SSE load instead of lock cmpxchg8b or
something.
It won't be safe to link with binaries compiled with old gcc that assumes a
simple SSE load/store is atomic on an 8B atomic_llong*, if the new design can
still pass it underaligned pointers. The existing ABI is broken.
Some code may happen to not be affected, especially when running on Intel
hardware (where only 64B boundaries matter, not 8B boundaries for x86 in
general). Or because they only depend on atomic RMW being atomic, not pure
load or pure store, so they just take the ~100x performance hit without losing
correctness in cases where a boundary is crossed.
>From gcc-bugs-return-574389-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 21:49:41 2017
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Subject: [Bug tree-optimization/81503] [8 Regression] Wrong code at -O2
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--- Comment #18 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Tue Sep 5 21:49:01 2017
New Revision: 251743
URL: https://gcc.gnu.org/viewcvs?rev=251743&root=gcc&view=rev
Log:
[gcc]
2017-09-05 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-08-29 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
Richard Biener <rguenther@suse.de>
PR tree-optimization/81503
* gimple-ssa-strength-reduction.c (replace_mult_candidate): Ensure
folded constant fits in the target type; reorder tests for clarity.
[gcc/testsuite]
2017-09-05 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-08-29 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
Richard Biener <rguenther@suse.de>
PR tree-optimization/81503
* gcc.c-torture/execute/pr81503.c: New file.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.c-torture/execute/pr81503.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/gimple-ssa-strength-reduction.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81503
--- Comment #19 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Tue Sep 5 21:50:38 2017
New Revision: 251744
URL: https://gcc.gnu.org/viewcvs?rev=251744&root=gcc&view=rev
Log:
[gcc]
2017-09-05 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-08-29 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
Richard Biener <rguenther@suse.de>
PR tree-optimization/81503
* gimple-ssa-strength-reduction.c (replace_mult_candidate): Ensure
folded constant fits in the target type; reorder tests for clarity.
[gcc/testsuite]
2017-09-05 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-08-29 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
Richard Biener <rguenther@suse.de>
PR tree-optimization/81503
* gcc.c-torture/execute/pr81503.c: New file.
Added:
branches/gcc-6-branch/gcc/testsuite/gcc.c-torture/execute/pr81503.c
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimple-ssa-strength-reduction.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-574391-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 21:52:40 2017
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Subject: [Bug tree-optimization/81503] [8 Regression] Wrong code at -O2
Date: Tue, 05 Sep 2017 21:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81503
--- Comment #20 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Tue Sep 5 21:52:01 2017
New Revision: 251745
URL: https://gcc.gnu.org/viewcvs?rev=251745&root=gcc&view=rev
Log:
[gcc]
2017-09-05 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-08-29 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
Richard Biener <rguenther@suse.de>
PR tree-optimization/81503
* gimple-ssa-strength-reduction.c (replace_mult_candidate): Ensure
folded constant fits in the target type; reorder tests for clarity.
[gcc/testsuite]
2017-09-05 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-08-29 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Jakub Jelinek <jakub@redhat.com>
Richard Biener <rguenther@suse.de>
PR tree-optimization/81503
* gcc.c-torture/execute/pr81503.c: New file.
Added:
branches/gcc-5-branch/gcc/testsuite/gcc.c-torture/execute/pr81503.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/gimple-ssa-strength-reduction.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-574392-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Sep 05 21:53:00 2017
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Subject: [Bug tree-optimization/81503] [8 Regression] Wrong code at -O2
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #21 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Fixed everywhere now.
>From gcc-bugs-return-574393-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 00:04:42 2017
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From: "barry.revzin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82110] New: Concept for default constructing works with new T, not with new T[1]
Date: Wed, 06 Sep 2017 00:04:00 -0000
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Bug ID: 82110
Summary: Concept for default constructing works with new T, not
with new T[1]
Product: gcc
Version: c++-concepts
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This example fails with all versions of gcc currently:
struct X {
X() = delete;
};
template <class T>
concept bool C = requires(T t) {
new T;
};
template <class T>
concept bool D = requires(T t) {
new T[1];
};
int main() {
static_assert(!C<X>); // ok
static_assert(!D<X>); // error
}
new T[1] still requires a public default constructor, just like new T, but X is
thought to model D (despite correctly not modeling C).
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/82111] New: kcoreaddons-5.37.0: desktopfileparser.cpp miscompiled in dbr pass
Date: Wed, 06 Sep 2017 00:13:00 -0000
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Bug ID: 82111
Summary: kcoreaddons-5.37.0: desktopfileparser.cpp miscompiled
in dbr pass
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
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Host: hppa-unknown-linux-gnu
Target: hppa-unknown-linux-gnu
Build: hppa-unknown-linux-gnu
Created attachment 42132
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42132&action=edit
Preprocessed source
The kdelibs4support fails to build on hppa due to a segmentation fault in
desktoptojson. This is debian bug #874312.
The fault occurs in __sync_sub_and_fetch_4. It occurs because the r26
argument register is not initialized before the call.
We have in ServiceTypeDefinition::parseValue(QByteArray const&, QString const&)
const the following code:
0x00018cac <+660>: ldw c(r6),r25
0x00018cb0 <+664>: ldw c(ret0),r26
0x00018cb4 <+668>: copy r5,r24
0x00018cb8 <+672>: add,l r6,r25,r25
0x00018cbc <+676>: b,l 0x13144,rp
0x00018cc0 <+680>: add,l ret0,r26,r26
0x00018cc4 <+684>: cmpib,<> 0,ret0,0x18ac0
<ServiceTypeDefinition::parseValue(QByteArray const&, QString const&)
const+168>
0x00018cc8 <+688>: copy r4,r19
0x00018ccc <+692>: ldw 4(r3),ret0
0x00018cd0 <+696>: ldo -1(ret0),ret0
0x00018cd4 <+700>: cmpib,= -1,ret0,0x18cec
<ServiceTypeDefinition::parseValue(QByteArray const&, QString const&)
const+724>
0x00018cd8 <+704>: copy r19,r4
0x00018cdc <+708>: b,l 0x22a78 <__sync_sub_and_fetch_4>,rp
0x00018ce0 <+712>: ldi 1,r25
The call at 0x00018cbc is to memcmp. When the two cmpib instructions fall
through to the call to __sync_sub_and_fetch_4, the r26 argument register is
not initialized for the call to __sync_sub_and_fetch_4.
The compilation command is:
/usr/lib/gcc/hppa-linux-gnu/7/cc1plus -fpreprocessed desktopfileparser.ii
-quiet -dumpbase desktopfileparser.cpp -auxbase-strip
CMakeFiles/desktoptojson.dir/__/lib/plugin/desktopfileparser.cpp.o -g -O2
-Wformat=1 -Werror=format-security -Wall -Wextra -Wcast-align -Wchar-subscripts
-Wformat-security -Wno-long-long -Wpointer-arith -Wundef -Wnon-virtual-dtor
-Woverloaded-virtual -Werror=return-type -Wvla -Wdate-time -Wpedantic
-Wsuggest-override -std=c++11 -std=gnu++11 -version
-fdebug-prefix-map=/home/dave/debian/kcoreaddons/kcoreaddons-5.37.0=.
-fno-operator-names -fexceptions -fvisibility=hidden
-fvisibility-inlines-hidden -fPIC -o desktopfileparser.s
It appears in looking at the rtl dumps that things go bad in the dbr pass.
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Subject: [Bug rtl-optimization/82111] kcoreaddons-5.37.0: desktopfileparser.cpp miscompiled in dbr pass
Date: Wed, 06 Sep 2017 00:14:00 -0000
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--- Comment #1 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 42133
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>From gcc-bugs-return-574396-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 00:15:33 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/82111] kcoreaddons-5.37.0: desktopfileparser.cpp miscompiled in dbr pass
Date: Wed, 06 Sep 2017 00:15:00 -0000
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--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> ---
Created attachment 42134
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42134&action=edit
Dump from dbr pass
>From gcc-bugs-return-574397-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 01:15:39 2017
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From: "dongkyun.s at samsung dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81907] memset called when it does not need to be; -mtune=cortex-a9
Date: Wed, 06 Sep 2017 01:15:00 -0000
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dongkyun.s at samsung dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WORKSFORME
--- Comment #18 from dongkyun.s at samsung dot com ---
Dear Michail,
Your analysis was very helpful. I've also verified that compiler may insert
memset() call or not according by 1) DSE optimization - object size/base and
tune options 2) code generation.
>From gcc-bugs-return-574398-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 02:14:27 2017
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From: "thiago at kde dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/71660] [5/6/7/8 regression] alignment of std::atomic<8 byte primitive type> (long long, double) is wrong on x86
Date: Wed, 06 Sep 2017 02:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71660
--- Comment #12 from Thiago Macieira <thiago at kde dot org> ---
Another problem is that we've now had a couple of years with this issue, so
it's probably worse to make a change again.
>From gcc-bugs-return-574399-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 04:05:46 2017
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From: "noloader at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82112] New: internal compiler error: in fold_convert_loc, at fold-const.c:2262
Date: Wed, 06 Sep 2017 04:05:00 -0000
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Bug ID: 82112
Summary: internal compiler error: in fold_convert_loc, at
fold-const.c:2262
Product: gcc
Version: 7.1.0
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I'm working on GCC112 (gcc112.fsffrance.org on the compile farm).
$ cat test.cxx
#include <altivec.h>
typedef unsigned char byte;
typedef vector unsigned char uint8x16_p8;
typedef vector unsigned long long uint64x2_p8;
#define ALIGN_DATA(n) __attribute__((aligned(n)))
int main(int argc, char* argv[])
{
ALIGN_DATA(16) const byte c[16] = {
0,1,2,3, 4,5,6,7, 8,9,10,11, 12,13,14,15
};
const uint64x2_p8 mask = vec_ld(0, c);
return 0;
}
==========
$ /opt/cfarm/gcc-latest/bin/g++ -c test.cxx
test.cxx: In function 'int main(int, char**)':
test.cxx:13:39: internal compiler error: in fold_convert_loc, at
fold-const.c:2262
const uint64x2_p8 mask = vec_ld(0, c);
^
0x1057fb4b fold_convert_loc(unsigned int, tree_node*, tree_node*)
../../gcc-7.1.0-src/gcc/fold-const.c:2261
0x103b3363 altivec_resolve_overloaded_builtin(unsigned int, tree_node*, void*)
../../gcc-7.1.0-src/gcc/config/rs6000/rs6000-c.c:6223
0x103632bb resolve_overloaded_builtin(unsigned int, tree_node*, vec<tree_node*,
va_gc, vl_embed>*)
../../gcc-7.1.0-src/gcc/c-family/c-common.c:7192
0x102a7713 finish_call_expr(tree_node*, vec<tree_node*, va_gc, vl_embed>**,
bool, bool, int)
../../gcc-7.1.0-src/gcc/cp/semantics.c:2406
0x102399b7 cp_parser_postfix_expression
../../gcc-7.1.0-src/gcc/cp/parser.c:6992
0x1023a57f cp_parser_unary_expression
../../gcc-7.1.0-src/gcc/cp/parser.c:8103
0x1023b883 cp_parser_cast_expression
../../gcc-7.1.0-src/gcc/cp/parser.c:8781
0x1023c207 cp_parser_binary_expression
../../gcc-7.1.0-src/gcc/cp/parser.c:8882
0x1023cac7 cp_parser_assignment_expression
../../gcc-7.1.0-src/gcc/cp/parser.c:9169
0x1023d05b cp_parser_constant_expression
../../gcc-7.1.0-src/gcc/cp/parser.c:9439
0x1023e153 cp_parser_initializer_clause
../../gcc-7.1.0-src/gcc/cp/parser.c:21575
0x1023f5eb cp_parser_initializer
../../gcc-7.1.0-src/gcc/cp/parser.c:21515
0x10256ccf cp_parser_init_declarator
../../gcc-7.1.0-src/gcc/cp/parser.c:19332
0x102574cb cp_parser_simple_declaration
../../gcc-7.1.0-src/gcc/cp/parser.c:12777
0x10258393 cp_parser_block_declaration
../../gcc-7.1.0-src/gcc/cp/parser.c:12602
0x10258eff cp_parser_declaration_statement
../../gcc-7.1.0-src/gcc/cp/parser.c:12212
0x1022d5df cp_parser_statement
../../gcc-7.1.0-src/gcc/cp/parser.c:10699
0x1022e74b cp_parser_statement_seq_opt
../../gcc-7.1.0-src/gcc/cp/parser.c:11031
0x1022e857 cp_parser_compound_statement
../../gcc-7.1.0-src/gcc/cp/parser.c:10985
0x10245643 cp_parser_function_body
../../gcc-7.1.0-src/gcc/cp/parser.c:21432
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.
==========
$ /opt/cfarm/gcc-latest/bin/g++ --version
g++ (GCC) 7.1.0
Copyright (C) 2017 Free Software Foundation, Inc.
>From gcc-bugs-return-574400-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 04:54:09 2017
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Subject: [Bug c++/82113] New: RVO isn't applied to base class constructor call in C++17
Date: Wed, 06 Sep 2017 04:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82113
Bug ID: 82113
Summary: RVO isn't applied to base class constructor call in
C++17
Product: gcc
Version: 7.2.0
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Reported on
https://stackoverflow.com/questions/46065704/why-isnt-rvo-applied-to-base-class-constructor-call-in-c17
With C++17 guaranteed copy elision, B::B() below should compile even when
Base::Base(Base&&) is deleted.
struct Base {
Base(Base&&) = delete;
Base& operator=(Base&&) = delete;
Base()
{
}
};
Base make_base()
{
return Base{};
}
struct A {
A() : b(make_base()) {} // <<<--- compiles fine
Base b;
};
#ifdef FAIL
struct B : public Base {
B() : Base(make_base()) {} // <<<--- "Base(Base&&) is deleted"
};
#endif
example https://godbolt.org/g/w3jRuc
>From gcc-bugs-return-574401-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 05:21:02 2017
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From: "law at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/64910] tree reassociation results in poor code
Date: Wed, 06 Sep 2017 05:21:00 -0000
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--- Comment #6 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Wed Sep 6 05:20:25 2017
New Revision: 251751
URL: https://gcc.gnu.org/viewcvs?rev=251751&root=gcc&view=rev
Log:
PR tree-optimization/64910
* tree-ssa-reassoc.c (reassociate_bb): Restrict last change to
cases where we have 3 or more operands.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-reassoc.c
>From gcc-bugs-return-574402-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 05:21:26 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/82114] New: gcc.dg/gimplefe-14.c for bare metal and argc is 0
Date: Wed, 06 Sep 2017 05:21:00 -0000
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Bug ID: 82114
Summary: gcc.dg/gimplefe-14.c for bare metal and argc is 0
Product: gcc
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On bare-metal targets, argc is usually 0 (and not 1) that means the check for
argc in gcc.dg/gimplefe-14.c is not working.
>From gcc-bugs-return-574403-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 05:32:29 2017
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Subject: [Bug c/82105] unexpected padding in a struct
Date: Wed, 06 Sep 2017 05:32:00 -0000
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--- Comment #7 from Dudu <dudu.arbel at ilrd dot co.il> ---
By the way: if you use long instead of int - you get no padding between x and
y, so the size of the struct is smaller!!!
typedef struct {
unsigned long x:16;
unsigned long y:17;
unsigned short z;
} SizeofThisIs8;
typedef struct {
unsigned int x:16;
unsigned int y:17;
unsigned short z;
} SizeofThisIs12;
Is this really the expected behavior???
>From gcc-bugs-return-574404-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 05:35:44 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82105] unexpected padding in a struct
Date: Wed, 06 Sep 2017 05:35:00 -0000
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--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Dudu from comment #7)
> By the way: if you use long instead of int - you get no padding between x
> and y, so the size of the struct is smaller!!!
>
> typedef struct {
> unsigned long x:16;
> unsigned long y:17;
> unsigned short z;
> } SizeofThisIs8;
>
> typedef struct {
> unsigned int x:16;
> unsigned int y:17;
> unsigned short z;
> } SizeofThisIs12;
>
> Is this really the expected behavior???
Yes. Basically in the first case, long is 64bits so 16+17 <=64 while int is 32
since 16+17 > 32, the 17 bit-field has to go to the next 32bit unit.
>From gcc-bugs-return-574405-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 05:38:49 2017
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Subject: [Bug c++/82115] New: ICE on (valid) C++11 code: Segmentation fault signal terminated program cc1plus
Date: Wed, 06 Sep 2017 05:38:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82115
Bug ID: 82115
Summary: ICE on (valid) C++11 code: Segmentation fault signal
terminated program cc1plus
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
It seems to be a recent regression.
$ g++tk -v
Using built-in specs.
COLLECT_GCC=g++tk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170905 (experimental) [trunk revision 251739] (GCC)
$
$ g++-6.2 -c small.cpp
$
$ g++tk -c small.cpp
g++tk: internal compiler error: Segmentation fault signal terminated program
cc1plus
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
$
---------------------------------------------
struct A { int const u = 0; };
struct B : A
{
constexpr B (int const *p) : v (p) {}
int const *v;
} constexpr b (&b.u);
template < typename > void foo () { b; }
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Subject: [Bug c++/82107] [5/6/7/8 Regression] O2 optimisation on amd64 leads to error
Date: Wed, 06 Sep 2017 07:12:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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Subject: [Bug c++/82115] [8 Regression] ICE on (valid) C++11 code: Segmentation fault signal terminated program cc1plus
Date: Wed, 06 Sep 2017 07:24:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Version|unknown |8.0
Target Milestone|--- |8.0
Summary|ICE on (valid) C++11 code: |[8 Regression] ICE on
|Segmentation fault signal |(valid) C++11 code:
|terminated program cc1plus |Segmentation fault signal
| |terminated program cc1plus
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Subject: [Bug target/82108] [7/8 Regression] Wrong vectorized code generated for x86_64
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Bah. Mine.
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Subject: [Bug ipa/82107] [5/6/7/8 Regression] O2 optimisation on amd64 leads to error
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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Subject: [Bug target/82106] [RISCV] Misaligned loads generated when doubles are split between stack and registers
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82115] [8 Regression] ICE on (valid) C++11 code: Segmentation fault signal terminated program cc1plus
Date: Wed, 06 Sep 2017 07:39:00 -0000
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, but for some reason hard to bisect. Stack overflow happens here:
#15 0x00000000007922d8 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:24095
#16 0x0000000000792192 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:23937
#17 0x0000000000791ce7 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:24011
#18 0x0000000000791ce7 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:24011
#19 0x0000000000792396 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:24046
#20 0x00000000007922d8 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:24095
#21 0x0000000000792192 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:23937
#22 0x0000000000791ce7 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:24011
#23 0x0000000000791ce7 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:24011
#24 0x0000000000792396 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:24046
#25 0x00000000007922d8 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:24095
#26 0x0000000000792192 in value_dependent_expression_p (expression=<optimized
out>) at ../../gcc/cp/pt.c:23937
#27 0x00000000007949c9 in instantiation_dependent_expression_p
(expression=<optimized out>) at ../../gcc/cp/pt.c:24519
#28 0x0000000000650ca7 in is_nondependent_constant_expression
(t=0x7ffff697e7e0) at ../../gcc/cp/constexpr.c:5907
#29 0x0000000000651113 in fold_non_dependent_expr (t=t@entry=0x7ffff697e7e0) at
../../gcc/cp/constexpr.c:4933
#30 0x000000000078b712 in build_non_dependent_expr
(expr=expr@entry=0x7ffff697e7e0) at ../../gcc/cp/pt.c:24955
#31 0x00000000007fe848 in finish_expr_stmt (expr=expr@entry=0x7ffff697e7e0) at
../../gcc/cp/semantics.c:693
#32 0x000000000074a5f5 in cp_parser_expression_statement
(parser=parser@entry=0x7ffff7feccf0,
in_statement_expr=in_statement_expr@entry=0x0) at ../../gcc/cp/parser.c:11127
#33 0x0000000000751bd4 in cp_parser_statement
(parser=parser@entry=0x7ffff7feccf0,
in_statement_expr=in_statement_expr@entry=0x0, in_compound=<optimized out>,
in_compound@entry=true, if_p=if_p@entry=0x0, chain=chain@entry=0x0,
loc_after_labels=loc_after_labels@entry=0x0)
at ../../gcc/cp/parser.c:10887
#34 0x0000000000752de1 in cp_parser_statement_seq_opt
(parser=parser@entry=0x7ffff7feccf0,
in_statement_expr=in_statement_expr@entry=0x0) at ../../gcc/cp/parser.c:11214
#35 0x0000000000752eb8 in cp_parser_compound_statement
(parser=parser@entry=0x7ffff7feccf0,
in_statement_expr=in_statement_expr@entry=0x0, bcs_flags=bcs_flags@entry=0,
function_body=function_body@entry=true) at ../../gcc/cp/parser.c:11168
#36 0x000000000076c719 in cp_parser_function_body (in_function_try_block=false,
parser=0x7ffff7feccf0) at ../../gcc/cp/parser.c:21622
#37 cp_parser_ctor_initializer_opt_and_function_body
(parser=parser@entry=0x7ffff7feccf0,
in_function_try_block=in_function_try_block@entry=false) at
../../gcc/cp/parser.c:21660
#38 0x000000000076e07b in cp_parser_function_definition_after_declarator
(parser=parser@entry=0x7ffff7feccf0, inline_p=inline_p@entry=false) at
../../gcc/cp/parser.c:26496
#39 0x000000000076ed5e in
cp_parser_function_definition_from_specifiers_and_declarator
(declarator=<optimized out>, attributes=0x0, decl_specifiers=0x7fffffffd610,
parser=0x7ffff7feccf0) at ../../gcc/cp/parser.c:26410
#40 cp_parser_init_declarator (parser=parser@entry=0x7ffff7feccf0,
decl_specifiers=decl_specifiers@entry=0x7fffffffd610, checks=checks@entry=0x0,
function_definition_allowed_p=function_definition_allowed_p@entry=true,
member_p=member_p@entry=false,
declares_class_or_enum=<optimized out>,
function_definition_p=0x7fffffffd60b, maybe_range_for_decl=0x0, init_loc=0x0,
auto_result=0x0) at ../../gcc/cp/parser.c:19374
#41 0x00000000007749fb in cp_parser_single_declaration
(parser=parser@entry=0x7ffff7feccf0, checks=checks@entry=0x0,
member_p=member_p@entry=false,
explicit_specialization_p=explicit_specialization_p@entry=false,
friend_p=friend_p@entry=0x7fffffffd6ef)
at ../../gcc/cp/parser.c:26953
#42 0x0000000000774bed in cp_parser_template_declaration_after_parameters
(parser=parser@entry=0x7ffff7feccf0,
parameter_list=parameter_list@entry=0x7ffff69882e0,
member_p=member_p@entry=false) at ../../gcc/cp/parser.c:26556
#43 0x0000000000775577 in cp_parser_explicit_template_declaration
(member_p=false, parser=0x7ffff7feccf0) at ../../gcc/cp/parser.c:26792
#44 cp_parser_template_declaration_after_export
(parser=parser@entry=0x7ffff7feccf0, member_p=<optimized out>) at
../../gcc/cp/parser.c:26811
#45 0x0000000000775899 in cp_parser_template_declaration
(parser=parser@entry=0x7ffff7feccf0, member_p=member_p@entry=false) at
../../gcc/cp/parser.c:14899
#46 0x000000000077b8ba in cp_parser_declaration
(parser=parser@entry=0x7ffff7feccf0) at ../../gcc/cp/parser.c:12652
#47 0x000000000077bbec in cp_parser_declaration_seq_opt
(parser=parser@entry=0x7ffff7feccf0) at ../../gcc/cp/parser.c:12579
#48 0x000000000077befb in cp_parser_translation_unit (parser=0x7ffff7feccf0) at
../../gcc/cp/parser.c:4387
#49 c_parse_file () at ../../gcc/cp/parser.c:38799
#50 0x00000000008c3c47 in c_common_parse_file () at
../../gcc/c-family/c-opts.c:1106
#51 0x0000000000d9dd4f in compile_file () at ../../gcc/toplev.c:471
#52 0x00000000005f22f7 in do_compile () at ../../gcc/toplev.c:2037
#53 toplev::main (this=this@entry=0x7fffffffd92e, argc=<optimized out>,
argc@entry=15, argv=<optimized out>, argv@entry=0x7fffffffda28) at
../../gcc/toplev.c:2172
#54 0x00000000005f47db in main (argc=15, argv=0x7fffffffda28) at
../../gcc/main.c:39
Breakpoint 1, value_dependent_expression_p (expression=0x7ffff69753d8) at
../../gcc/cp/pt.c:23889
23889 {
(gdb) p print_generic_expr(stderr, expression, 0)
{.u=0}$11 = void
(gdb) c
Continuing.
Breakpoint 1, value_dependent_expression_p (expression=0x7ffff6833270) at
../../gcc/cp/pt.c:23889
23889 {
(gdb) p print_generic_expr(stderr, expression, 0)
0$12 = void
(gdb) c
Continuing.
Breakpoint 1, value_dependent_expression_p (expression=0x7ffff6988200) at
../../gcc/cp/pt.c:23889
23889 {
(gdb) p print_generic_expr(stderr, expression, 0)
&b.D.2295.u$13 = void
(gdb) c
Continuing.
Breakpoint 1, value_dependent_expression_p (expression=0x7ffff68129c0) at
../../gcc/cp/pt.c:23889
23889 {
(gdb) p print_generic_expr(stderr, expression, 0)
b.D.2295.u$14 = void
(gdb) c
Continuing.
Breakpoint 1, value_dependent_expression_p (expression=0x7ffff6812a50) at
../../gcc/cp/pt.c:23889
23889 {
(gdb) p print_generic_expr(stderr, expression, 0)
b.D.2295$15 = void
(gdb) c
Continuing.
Breakpoint 1, value_dependent_expression_p (expression=0x7ffff697e7e0) at
../../gcc/cp/pt.c:23889
23889 {
(gdb) p print_generic_expr(stderr, expression, 0)
b$16 = void
(gdb) c
Continuing.
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Subject: [Bug target/77308] surprisingly large stack usage for sha512 on arm
Date: Wed, 06 Sep 2017 07:48:00 -0000
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--- Comment #65 from Bernd Edlinger <edlinger at gcc dot gnu.org> ---
Author: edlinger
Date: Wed Sep 6 07:47:52 2017
New Revision: 251752
URL: https://gcc.gnu.org/viewcvs?rev=251752&root=gcc&view=rev
Log:
2017-09-06 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR target/77308
* config/arm/predicates.md (arm_general_adddi_operand): Create new
non-vfp predicate.
* config/arm/arm.md (*arm_adddi3, *arm_subdi3): Use new predicates.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/arm/arm.md
trunk/gcc/config/arm/predicates.md
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/78468] [8 regression] libgomp.c/reduction-10.c and many more FAIL
Date: Wed, 06 Sep 2017 08:02:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed|2016-11-25 00:00:00 |2017-9-6
CC| |wilco at gcc dot gnu.org
Version|7.0 |8.0
Resolution|FIXED |---
Target Milestone|7.0 |8.0
Summary|[7 regression] |[8 regression]
|libgomp.c/reduction-10.c |libgomp.c/reduction-10.c
|and many more FAIL |and many more FAIL
--- Comment #37 from Rainer Orth <ro at gcc dot gnu.org> ---
This patch
2017-09-05 Wilco Dijkstra <wdijkstr@arm.com>
* explow.c (get_dynamic_stack_size): Improve dynamic alignment.
brought the exact same set of failures back on sparc-sun-solaris2.11.
Rainer
>From gcc-bugs-return-574414-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 08:27:03 2017
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From: "paul.richard.thomas at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82064] [7/8 Regression] [OOP] multiple incompatible definitions of extended derived type via module use
Date: Wed, 06 Sep 2017 08:27:00 -0000
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--- Comment #6 from paul.richard.thomas at gmail dot com <paul.richard.thomas at gmail dot com> ---
Aaaah! I missed the point wrt separate files.
As far as I remember, we make sure that class or derived entities get
their vtable but not unreferenced type declarations.
Cheers
Paul
On 5 September 2017 at 14:25, janus at gcc dot gnu.org
<gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82064
>
> --- Comment #5 from janus at gcc dot gnu.org ---
> (In reply to Paul Thomas from comment #4)
>> (In reply to janus from comment #3)
>> > It appears that the regression has been introduced by r241450, which was the
>> > fix for PR 69834. Reverting it, in particular the changes to
>> > resolve_select_type, makes the error go away.
>>
>> Strangely, my GNU Fortran (GCC) 8.0.0 20170830 gives me two "OK"s :-)
>
> Also on the version with separate files?
>
>
>> That said, this is a repeat of another recent bug (sorry, I am rushing off
>> to work - no time to find the number). I posted a work around, which
>> translates in this case to:
>>
>> [..]
>>
>> The permanent fix is to make sure that the vtables get produced
>> unconditionally for module derived types.
>
> I thought we already did that, but probably we're still missing some cases?
>
> --
> You are receiving this mail because:
> You are on the CC list for the bug.
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Subject: [Bug c++/78269] FAIL: FAIL: g++.dg/cpp1z/noexcept-type11.C and FAIL: g++.dg/cpp1z/noexcept-type9.C
Date: Wed, 06 Sep 2017 08:48:00 -0000
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |paolo.carlini at oracle dot com
--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Thomas, both trunk and gcc-7-brnanch seem fine to me, I'm tempted to close the
bug. Can you double check the released 7.1.0 on aarch64?
>From gcc-bugs-return-574416-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 08:51:00 2017
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Subject: [Bug rtl-optimization/80463] [5/6/7/8 Regression] ICE with -fselective-scheduling2 and -fvar-tracking-assignments
Date: Wed, 06 Sep 2017 08:51:00 -0000
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Andrey Belevantsev <abel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |abel at gcc dot gnu.org
--- Comment #3 from Andrey Belevantsev <abel at gcc dot gnu.org> ---
I've debugged this one a bit on a revision with an ICE. We fail to move up a
bookkeeping copy of a debug insn because of a piece of code in sched-deps.c:
3094 /* Quite often, a debug insn will refer to stuff in the
3095 previous instruction, but the reason we want this
3096 dependency here is to make sure the scheduler doesn't
3097 gratuitously move a debug insn ahead. This could dirty
3098 DF flags and cause additional analysis that wouldn't have
3099 occurred in compilation without debug insns, and such
3100 additional analysis can modify the generated code. */
3101 prev = PREV_INSN (insn);
3102
3103 if (prev && NONDEBUG_INSN_P (prev)
3104 add_dependence (insn, prev, REG_DEP_ANTI);
The initial insn didn't have this dependence because it was the first in block.
We could either switch off this conditional completely for selective scheduling
or pass there the insn through which we try to move our debug insn to be used
as prev instead of completely bogus prev insn. The former is much simple
because var-tracking doesn't play well with sel-sched anyways.
However, while experimenting with these I have found an issue with the
scheduler creating bookkeeping blocks such that the hot/cold partitioning
breaks. This one should be fixed first hopefully after some discussions with
Honza at the cauldron.
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Subject: [Bug middle-end/78468] [8 regression] libgomp.c/reduction-10.c and many more FAIL
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Wilco <wdijkstr at arm dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |wdijkstr at arm dot com
--- Comment #38 from Wilco <wdijkstr at arm dot com> ---
(In reply to Rainer Orth from comment #37)
> This patch
>
> 2017-09-05 Wilco Dijkstra <wdijkstr@arm.com>
>
> * explow.c (get_dynamic_stack_size): Improve dynamic alignment.
>
> brought the exact same set of failures back on sparc-sun-solaris2.11.
>
> Rainer
The existing alloca code relies on STACK_BOUNDARY being set correctly. Has the
value been fixed already for the OS variants mentioned? If stack alignment
can't be guaranteed by OS/runtime/prolog, STACK_BOUNDARY should be 8.
>From gcc-bugs-return-574418-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 09:11:08 2017
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Subject: [Bug middle-end/82095] [8 Regression] ICE in tree_nop_conversion at tree.c:11793 on ppc64le
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 6 09:10:26 2017
New Revision: 251754
URL: https://gcc.gnu.org/viewcvs?rev=251754&root=gcc&view=rev
Log:
PR middle-end/82095
* varasm.c (categorize_decl_for_section): Use SECCAT_TBSS for TLS vars
with
NULL DECL_INITIAL.
* gcc.dg/tls/pr82095.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tls/pr82095.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/varasm.c
>From gcc-bugs-return-574419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 09:16:14 2017
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From: "mephi42 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/82116] New: "nested bug in the same thread" when a bug is found while reporting another one
Date: Wed, 06 Sep 2017 09:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82116
Bug ID: 82116
Summary: "nested bug in the same thread" when a bug is found
while reporting another one
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: mephi42 at gmail dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
Created attachment 42135
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42135&action=edit
minimal reproducible example
The attached program fails with
AddressSanitizer: nested bug in the same thread, aborting.
without diagnosing the stack-buffer-overflow.
In rare cases it exits correctly with the expected
AddressSanitizer: while reporting a bug found another one. Ignoring.
ERROR: AddressSanitizer: stack-buffer-overflow on address ...
>From gcc-bugs-return-574420-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 09:16:18 2017
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/78468] [8 regression] libgomp.c/reduction-10.c and many more FAIL
Date: Wed, 06 Sep 2017 09:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78468
--- Comment #39 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> The existing alloca code relies on STACK_BOUNDARY being set correctly. Has
> the value been fixed already for the OS variants mentioned? If stack
> alignment can't be guaranteed by OS/runtime/prolog, STACK_BOUNDARY should be
> 8.
No, no, no, please read the ??? note I put in emit-rtl.c. STACK_BOUNDARY is
correct, the problem is the declared alignment of the virtual registers.
>From gcc-bugs-return-574421-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 09:21:38 2017
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Subject: [Bug tree-optimization/82078] [8 Regression] wrong code at -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu
Date: Wed, 06 Sep 2017 09:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82078
--- Comment #8 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Thanks for a nice small testcase. I have proposed a fix on the mailing list:
https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00321.html
>From gcc-bugs-return-574422-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 09:25:37 2017
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Subject: [Bug tree-optimization/82078] [8 Regression] wrong code at -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu
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--- Comment #9 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Wed Sep 6 09:25:00 2017
New Revision: 251756
URL: https://gcc.gnu.org/viewcvs?rev=251756&root=gcc&view=rev
Log:
Enqueue all SRA links for write flag propagation
2017-09-06 Martin Jambor <mjambor@suse.cz>
PR tree-optimization/82078
gcc/
* tree-sra.c (sort_and_splice_var_accesses): Move call to
add_access_to_work_queue...
(build_accesses_from_assign): ...here.
(propagate_all_subaccesses): Make sure racc is the group
representative, if there is one.
gcc/testsuite/
* gcc.dg/tree-ssa/pr82078.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr82078.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-sra.c
>From gcc-bugs-return-574423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 09:32:24 2017
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Subject: [Bug sanitizer/82116] "nested bug in the same thread" when a bug is found while reporting another one
Date: Wed, 06 Sep 2017 09:32:00 -0000
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--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That looks like upstream libsanitizer bug or limitation.
>From gcc-bugs-return-574424-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 09:39:56 2017
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Subject: [Bug middle-end/82117] New: [8 Regression] SPEC CPU2017 502/602 compfail (ICE)
Date: Wed, 06 Sep 2017 09:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82117
Bug ID: 82117
Summary: [8 Regression] SPEC CPU2017 502/602 compfail (ICE)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
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Reporter: andrey.y.guskov at intel dot com
Target Milestone: ---
Since r251650, the following happens @ CPU2017 502 and 602:
during GIMPLE pass: pre
sel-sched.c: In function 'fill_vec_av_set':
sel-sched.c:3689:1: internal compiler error: Segmentation fault
fill_vec_av_set (av_set_t av, blist_t bnds, fence_t fence,
^
0xc97776 crash_signal
<------>../../../gcc/gcc/toplev.c:341
0xdd527d fini_eliminate
<------>../../../gcc/gcc/tree-ssa-pre.c:4863
0xddd8a7 execute
<------>../../../gcc/gcc/tree-ssa-pre.c:5201
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.
lto-wrapper: fatal error: gcc returned 1 exit status
compilation terminated.
Option set:
-m64 -march=core-avx2 -mfpmath=sse -Ofast -fno-associative-math -funroll-loops
-flto -z muldefs -std=gnu89 -fopenmp
>From gcc-bugs-return-574425-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 09:52:39 2017
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Subject: [Bug middle-end/82117] [8 Regression] SPEC CPU2017 502/602 compfail (ICE)
Date: Wed, 06 Sep 2017 09:52:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
Target Milestone|--- |8.0
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 82102 ***
>From gcc-bugs-return-574426-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 09:52:39 2017
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Subject: [Bug tree-optimization/82102] [8 Regression] ICE: Segmentation fault in /home/arnd/git/gcc/gcc/tree-ssa-pre.c:4863
Date: Wed, 06 Sep 2017 09:52:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andrey.y.guskov at intel dot com
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 82117 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-574427-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 09:59:01 2017
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Subject: [Bug middle-end/82117] [8 Regression] SPEC CPU2017 502/602 compfail (ICE)
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--- Comment #2 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Weird. I did a Bugzilla search for "r251650", but it told me that nothing was
found.
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Subject: [Bug middle-end/78468] [8 regression] libgomp.c/reduction-10.c and many more FAIL
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--- Comment #40 from Wilco <wdijkstr at arm dot com> ---
(In reply to Eric Botcazou from comment #39)
> > The existing alloca code relies on STACK_BOUNDARY being set correctly. Has
> > the value been fixed already for the OS variants mentioned? If stack
> > alignment can't be guaranteed by OS/runtime/prolog, STACK_BOUNDARY should be
> > 8.
>
> No, no, no, please read the ??? note I put in emit-rtl.c. STACK_BOUNDARY is
> correct, the problem is the declared alignment of the virtual registers.
If you cannot guarantee the alignment of the pointers to STACK_BOUNDARY then
STACK_BOUNDARY is incorrect. GCC uses the STACK_BOUNDARY guarantee in
optimizations so it is essential to get this right if you want correct code
generation.
>From gcc-bugs-return-574429-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 10:12:04 2017
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Subject: [Bug middle-end/82117] [8 Regression] SPEC CPU2017 502/602 compfail (ICE)
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Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
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--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
(In reply to Andrey Guskov from comment #2)
> Weird. I did a Bugzilla search for "r251650", but it told me that nothing
> was found.
Already fixed and closed bugs are not searched by default.
>From gcc-bugs-return-574430-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 10:14:53 2017
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Subject: [Bug middle-end/78468] [8 regression] libgomp.c/reduction-10.c and many more FAIL
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--- Comment #41 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> If you cannot guarantee the alignment of the pointers to STACK_BOUNDARY then
> STACK_BOUNDARY is incorrect.
No, it is correct as per the definition:
-- Macro: STACK_BOUNDARY
Define this macro to the minimum alignment enforced by hardware
for the stack pointer on this machine. The definition is a C
expression for the desired alignment (measured in bits). This
value is used as a default if `PREFERRED_STACK_BOUNDARY' is not
defined. On most machines, this should be the same as
`PARM_BOUNDARY'.
> GCC uses the STACK_BOUNDARY guarantee in optimizations so it is essential to
> get this right if you want correct code generation.
No, you're interpolating, please read the entire discussion. Your change is
based on a premise that is wrong at least on 32-bit SPARC.
>From gcc-bugs-return-574431-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 10:23:10 2017
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Subject: [Bug c++/82115] [8 Regression] ICE on (valid) C++11 code: Segmentation fault signal terminated program cc1plus
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Why do you think it is a recent regression?
I certainly see ICE with the same issue (endless recursion in
value_dependent_expression_p) all the way back to r180013 (r180000 fails to
compile it, so it must be one of r180001, r180002 or r180003 where it started
to be accepted and ICE).
>From gcc-bugs-return-574432-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 10:27:22 2017
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Subject: [Bug c++/82115] [8 Regression] ICE on (valid) C++11 code: Segmentation fault signal terminated program cc1plus
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
It doesn't ICE with -fno-checking though.
>From gcc-bugs-return-574433-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 10:39:12 2017
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Subject: [Bug middle-end/78468] [8 regression] libgomp.c/reduction-10.c and many more FAIL
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--- Comment #42 from Wilco <wilco at gcc dot gnu.org> ---
(In reply to Eric Botcazou from comment #41)
> > If you cannot guarantee the alignment of the pointers to STACK_BOUNDARY then
> > STACK_BOUNDARY is incorrect.
>
> No, it is correct as per the definition:
>
> -- Macro: STACK_BOUNDARY
> Define this macro to the minimum alignment enforced by hardware
> for the stack pointer on this machine. The definition is a C
> expression for the desired alignment (measured in bits). This
> value is used as a default if `PREFERRED_STACK_BOUNDARY' is not
> defined. On most machines, this should be the same as
> `PARM_BOUNDARY'.
Indeed, so that means alloca code can safely rely on SP being aligned to
STACK_BOUNDARY.
> > GCC uses the STACK_BOUNDARY guarantee in optimizations so it is essential to
> > get this right if you want correct code generation.
>
> No, you're interpolating, please read the entire discussion. Your change is
> based on a premise that is wrong at least on 32-bit SPARC.
Yes I did, and it is quite clear - if SPARC doesn't guarantee alignment of the
pointers, it setting of STACK_BOUNDARY is simply incorrect. Alloca will access
data below SP if SP is not aligned to STACK_BOUNDARY even before my patch. No
amount of extra padding to try hiding the bug will fix that.
>From gcc-bugs-return-574434-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 11:36:20 2017
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From: "pmenzel+gcc at molgen dot mpg.de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/82118] New: Instruction `lsrsne` unknown
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Bug ID: 82118
Summary: Instruction `lsrsne` unknown
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>From the discussion of a change-set for coreboot [1], it turns out that GCC
does not understand valid instructions.
```
$ arm-linux-gnueabi-gcc-7 --version
arm-linux-gnueabi-gcc-7 (Debian 7.2.0-1) 7.2.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ cat mov1.S
lsrsne r0, r0, #4
$ arm-linux-gnueabi-gcc-7 mov1.S -c -o mov1.gas
mov1.S: Assembler messages:
mov1.S:1: Error: bad instruction `lsrsne r0,r0,#4'
$ cat mov1.S
lsrsne r0, r0, #4
$ arm-linux-gnueabi-gcc-7 mov2.S -c -o mov2.gas
```
Julius Werner comments as below.
> FWIW, the ARMv7 A.R.M. says the S comes before the condition code, so this
> should've been MOVSNE instead of MOVNES anyway. It also doesn't explicitly
> allow a source operand shift for MOV, so LSRSNE should be the correct form. I
> bet GCC just has a few additional non-standard aliases, but I would be
> surprised if it can't recognize the official and most obvious notation
> (LSRSNE).
But there is an error in GCC.
[1] https://review.coreboot.org/21358/
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Subject: [Bug hsa/82119] New: Revision 251264 caused a number of run-time HSA failures
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82119
Bug ID: 82119
Summary: Revision 251264 caused a number of run-time HSA
failures
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: hsa
Assignee: unassigned at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
CC: jamborm at gcc dot gnu.org, marxin at gcc dot gnu.org
Target Milestone: ---
I have tracked a number of new run-time HSA failures to r251264:
===== libgomp.sum =====
Tests that previously PASSED but now FAILED:
libgomp.c/examples-4/declare_target-1.c execution test
libgomp.c/pr66199-7.c execution test
libgomp.c/pr66199-8.c execution test
libgomp.c/pr66199-9.c execution test
libgomp.c++/pr66199-7.C execution test
libgomp.c++/pr66199-8.C execution test
libgomp.c++/pr66199-9.C execution test
libgomp.c++/target-9.C execution test
libgomp.hsa.c/switch-1.c execution test
libgomp.hsa.c/switch-branch-1.c execution test
>From gcc-bugs-return-574436-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 12:02:47 2017
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Subject: [Bug hsa/82119] Revision 251264 caused a number of run-time HSA failures
Date: Wed, 06 Sep 2017 12:02:00 -0000
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-09-06
Assignee|unassigned at gcc dot gnu.org |jamborm at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Jambor <jamborm at gcc dot gnu.org> ---
I will have a look at what is going on.
>From gcc-bugs-return-574437-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 12:12:09 2017
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/82118] Instruction `lsrsne` unknown
Date: Wed, 06 Sep 2017 12:12:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #1 from Christophe Lyon <clyon at gcc dot gnu.org> ---
The error message comes from gas (binutils package), not gcc.
You should file your bug report there:
https://sourceware.org/bugzilla/
then select the 'binutils' component.
>From gcc-bugs-return-574438-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 12:31:57 2017
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Subject: [Bug c/82118] Instruction `lsrsne` unknown
Date: Wed, 06 Sep 2017 12:31:00 -0000
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Paul Menzel <pmenzel+gcc at molgen dot mpg.de> changed:
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--- Comment #2 from Paul Menzel <pmenzel+gcc at molgen dot mpg.de> ---
Sorry for the noise, and thank you for the help. This is bug 22094 at the
binutils bug tracker [1].
[1] https://sourceware.org/bugzilla/show_bug.cgi?id=22094
>From gcc-bugs-return-574439-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 12:32:28 2017
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Subject: [Bug target/82108] [7/8 Regression] Wrong vectorized code generated for x86_64
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Sep 6 12:31:52 2017
New Revision: 251790
URL: https://gcc.gnu.org/viewcvs?rev=251790&root=gcc&view=rev
Log:
2017-09-06 Richard Biener <rguenther@suse.de>
PR tree-optimization/82108
* tree-vect-stmts.c (vectorizable_load): Fix pointer adjustment
for gap in the non-permutation SLP case.
* gcc.dg/vect/pr82108.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr82108.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-stmts.c
>From gcc-bugs-return-574440-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 13:02:06 2017
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Subject: [Bug c++/78269] FAIL: FAIL: g++.dg/cpp1z/noexcept-type11.C and FAIL: g++.dg/cpp1z/noexcept-type9.C
Date: Wed, 06 Sep 2017 13:02:00 -0000
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--- Comment #6 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Paolo Carlini from comment #5)
> Thomas, both trunk and gcc-7-brnanch seem fine to me, I'm tempted to close
> the bug. Can you double check the released 7.1.0 on aarch64?
Hi Paolo,
yes I can confirm g++.dg/cpp1z/noexcept-type11.C passes on both ARM and Aarch64
on trunk and latest GCC 7.
This bug can be closed.
>From gcc-bugs-return-574441-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 13:10:08 2017
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Subject: [Bug c++/78269] FAIL: FAIL: g++.dg/cpp1z/noexcept-type11.C and FAIL: g++.dg/cpp1z/noexcept-type9.C
Date: Wed, 06 Sep 2017 13:10:00 -0000
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--- Comment #7 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Any idea about stock 7.1.0? Or 7.2.0? We want to add the information before
resolving it.
>From gcc-bugs-return-574442-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 13:14:49 2017
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Subject: [Bug tree-optimization/58012] Gcc bootstrap failed with cloog-isl: undefined reference to std::istream::ignore(long)
Date: Wed, 06 Sep 2017 13:14:00 -0000
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Markus <exterminator@forty-seven.info> changed:
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CC| |exterminator@forty-seven.in
| |fo
--- Comment #3 from Markus <exterminator@forty-seven.info> ---
I had the same issue with 5.4.0 even without isl. What solved it for me was to
remove the '--disable-static' from the configure options.
>From gcc-bugs-return-574443-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 13:32:32 2017
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From: "thopre01 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/82120] New: FAIL: gcc.dg/tree-ssa/pr81588.c
Date: Wed, 06 Sep 2017 13:32:00 -0000
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Bug ID: 82120
Summary: FAIL: gcc.dg/tree-ssa/pr81588.c
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: testsuite
Assignee: unassigned at gcc dot gnu.org
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Target: arm-none-eabi
Hi,
gcc.dg/tree-ssa/pr81588.c scan-tree-dump-times fails on GCC 7 (but not on
trunk) for Arm Cortex-M0, Cortex-M3 and Cortex-M4 cores. It does work when
targeting Arm Cortex-M7 though.
For the affected target, the string searched is not found in the dump.
Best regards.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/81588] [7/8 Regression] Wrong code at -O2
Date: Wed, 06 Sep 2017 13:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81588
--- Comment #10 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to Christophe Lyon from comment #9)
> I've noticed that the new testcase (gcc.dg/tree-ssa/pr81588.c) fails on the
> gcc-7 branch (r251446) on arm-linux-gnueabihf --with-cpu=cortex-a5
> --with-fpu=vfpv3-d16-fp16.
Thomas has just created a new bug report for this: bug #82120
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82120
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From: "iain.miller at ecmwf dot int" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82121] New: Unclassifiable statement during compilation when assigning to a Character array in a derived type contained in a ASSOCIATE statement
Date: Wed, 06 Sep 2017 13:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82121
Bug ID: 82121
Summary: Unclassifiable statement during compilation when
assigning to a Character array in a derived type
contained in a ASSOCIATE statement
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: iain.miller at ecmwf dot int
Target Milestone: ---
Created attachment 42136
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42136&action=edit
Tarball of files showing issue and corresponding .s files
A bug has been introduced in gfortran 7+ when trying to use an ASSOCIATE
construct to associate a new variable name to a Character array held within a
derived type. The correct F03 code was previously compiled without issue in
gfortran 6.3.0 and earlier.
Addressing the array verbosely without using the associate variable compiles.
Addressing character arrays not in a derived type via an associate variable
compiles as well.
Output is:
sucddh.F90:17:0:
CADHTLS(2)='SVGTLT'
Error: Unclassifiable statement at (1)
Files to reproduce (also attached for completeness):
#===== yomcddh.F90 =====#
MODULE YOMCDDH
IMPLICIT NONE
SAVE
TYPE :: TCDDH
CHARACTER(len=12),ALLOCATABLE :: CADHTLS(:)
END TYPE TCDDH
CHARACTER(len=12),ALLOCATABLE :: CADHTTS(:)
TYPE(TCDDH), POINTER :: YRCDDH => NULL()
END MODULE YOMCDDH
#===== end of yomcddh.F90 =====#
#===== sucddh.F90 =====#
SUBROUTINE SUCDDH()
USE YOMCDDH , ONLY : YRCDDH,CADHTTS
IMPLICIT NONE
ALLOCATE (YRCDDH%CADHTLS(20))
ALLOCATE (CADHTTS(20))
ASSOCIATE(CADHTLS=>YRCDDH%CADHTLS, NORMCHAR=>CADHTTS)
! Direct reference to character array compiles correctly
YRCDDH%CADHTLS(1)='SVGTLF'
! Reference to associated variable name fails to compile
CADHTLS(2)='SVGTLT'
NORMCHAR(1)='SVLTTC'
END ASSOCIATE
END SUBROUTINE SUCDDH
#===== end of sucddh.F90 =====#
Build using following commands:
gfortran -c yomcddh.F90
gfortran -c -I. sucddh.F90
This has been confirmed on three separate x86_64 systems, two using SLES and
gfortran 7.2.0 and one using Fedora and gfortran 7.1.1.
Build details for SLES systems:
lxg38: vsimple $ gfortran -v
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/home/group/usid/bin/compilers/lxg/gcc/7.2.0/libexec/gcc/x86_64-suse-linux/7.2.0/lto-wrapper
Target: x86_64-suse-linux
Configured with: ../gcc-7.2.0/configure
--prefix=/home/group/usid/bin/compilers/lxg/gcc/7.2.0
--enable-languages=c,c++,objc,fortran,obj-c++ --enable-checking=release
--enable-ssp --disable-libssp --disable-plugin --disable-libgcj
--disable-libmudflap --with-system-zlib --enable-__cxa_atexit
--enable-libstdcxx-allocator=new --disable-libstdcxx-pch
--enable-version-specific-runtime-libs --with-cpu=generic
--build=x86_64-suse-linux --enable-linker-build-id --enable-linux-futex
--without-system-libunwind --disable-multilib --with-pkgversion='ECMWF build by
usid'
Thread model: posix
gcc version 7.2.0 (ECMWF build by usid)
Build details for Fedora system:
Using built-in specs.
COLLECT_GCC=gfortran
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-redhat-linux
Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr
--mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared
--enable-threads=posix --enable-checking=release --enable-multilib
--with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
--enable-gnu-unique-object --enable-linker-build-id
--with-gcc-major-version-only --with-linker-hash-style=gnu --enable-plugin
--enable-initfini-array --with-isl --enable-libmpx
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-gnu-indirect-function --with-tune=generic --with-arch_32=i686
--build=x86_64-redhat-linux
Thread model: posix
gcc version 7.1.1 20170622 (Red Hat 7.1.1-3) (GCC)
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From: "drizt at land dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/82122] New: Overloaded operator new/delete in MinGW is not calling from .dlls
Date: Wed, 06 Sep 2017 13:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82122
Bug ID: 82122
Summary: Overloaded operator new/delete in MinGW is not calling
from .dlls
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: drizt at land dot ru
Target Milestone: ---
$ /usr/bin/i686-w64-mingw32-gcc -v
Using built-in specs.
COLLECT_GCC=/usr/bin/i686-w64-mingw32-gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/i686-w64-mingw32/7.2.0/lto-wrapper
Target: i686-w64-mingw32
Configured with: ../configure --prefix=/usr --bindir=/usr/bin
--includedir=/usr/include --mandir=/usr/share/man --infodir=/usr/share/info
--datadir=/usr/share --build=x86_64-redhat-linux-gnu
--host=x86_64-redhat-linux-gnu --with-gnu-as --with-gnu-ld --verbose
--without-newlib --disable-multilib --disable-plugin --with-system-zlib
--disable-nls --without-included-gettext --disable-win32-registry
--enable-languages=c,c++,objc,obj-c++,fortran
--with-bugurl=http://bugzilla.redhat.com/bugzilla --with-cloog
--enable-threads=posix --enable-libgomp --target=i686-w64-mingw32
--with-sysroot=/usr/i686-w64-mingw32/sys-root
--with-gxx-include-dir=/usr/i686-w64-mingw32/sys-root/mingw/include/c++
Thread model: posix
gcc version 7.2.0 20170814 (Fedora MinGW 7.2.0-1.fc26) (GCC)
For MinGW targets overloading new/delete operators is not applied for .dll
files. I tested it with Fedora 26 MinGW, MinGW 4.9.2 and MinGW 4.8.2 on Windows
7. Here I show log for Fedora MinGW
Source files:
$ cat lib.cpp
#include "lib.h"
#include <cstdio>
#include <cstdlib>
void func(A *a)
{
std::printf("library delete called, pointer = 0x%p\n", a);
delete a;
}
$ cat lib.h
class A
{
int a;
};
void func(A *a);
$ cat main.cpp
#include "lib.h"
#include <cstdio>
#include <cstdlib>
// replacement of a minimal set of functions:
void *operator new(std::size_t sz)
{
void *ptr = std::malloc(sz);
std::printf("global op new called, size = %zu, pointer = 0x%p\n", sz, ptr);
return ptr;
}
void operator delete(void* ptr) noexcept
{
std::printf("global op delete called, pointer = 0x%p\n", ptr);
std::free(ptr);
}
int main()
{
A *a = new A();
A *b = new A();
func(a);
delete b;
return 0;
}
Compile:
$ i686-w64-mingw32-g++ -Dlib_EXPORTS -std=c++11 -o lib.cpp.obj -c lib.cpp
$ i686-w64-mingw32-g++ -std=c++11 -shared -o liblib.dll lib.cpp.obj
$ i686-w64-mingw32-g++ -std=c++11 -o main.cpp.obj -c main.cpp
$ i686-w64-mingw32-g++ -std=c++11 -o main.exe liblib.dll -lkernel32 -luser32
-lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32
main.cpp.obj
Output:
$ ./main.exe
fixme:winediag:start_process Wine Staging 2.15 is a testing version containing
experimental patches.
fixme:winediag:start_process Please mention your exact version when filing bug
reports on winehq.org.
global op new called, size = 4, pointer = 0x00241718
global op new called, size = 4, pointer = 0x00246268
library delete called, pointer = 0x00241718
global op delete called, pointer = 0x00246268
The same with Linux gcc output:
$ ./main
global op new called, size = 4, pointer = 0x0x1accc20
global op new called, size = 4, pointer = 0x0x1acd050
library delete called, pointer = 0x0x1accc20
global op delete called, pointer = 0x0x1accc20
global op delete called, pointer = 0x0x1acd050
>From gcc-bugs-return-574447-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 13:54:48 2017
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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82112] internal compiler error: in fold_convert_loc, at fold-const.c:2262
Date: Wed, 06 Sep 2017 13:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82112
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-09-06
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42137
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42137&action=edit
gcc8-pr82112.patch
Untested fix.
>From gcc-bugs-return-574448-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 13:55:09 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/82120] FAIL: gcc.dg/tree-ssa/pr81588.c
Date: Wed, 06 Sep 2017 13:55:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
logica-op-short-circuit?
>From gcc-bugs-return-574449-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 14:05:58 2017
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82108] [7 Regression] Wrong vectorized code generated for x86_64
Date: Wed, 06 Sep 2017 14:05:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Known to work| |8.0
Summary|[7/8 Regression] Wrong |[7 Regression] Wrong
|vectorized code generated |vectorized code generated
|for x86_64 |for x86_64
Known to fail|8.0 |
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar, thanks for the report.
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Subject: [Bug c++/78269] FAIL: FAIL: g++.dg/cpp1z/noexcept-type11.C and FAIL: g++.dg/cpp1z/noexcept-type9.C
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Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC|paolo.carlini at oracle dot com |
Resolution|--- |FIXED
Target Milestone|--- |7.0
--- Comment #8 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Confirmed that 7.1.0 is fine.
>From gcc-bugs-return-574451-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 14:15:43 2017
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Subject: [Bug c++/78269] FAIL: FAIL: g++.dg/cpp1z/noexcept-type11.C and FAIL: g++.dg/cpp1z/noexcept-type9.C
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--- Comment #9 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Paolo Carlini from comment #8)
> Confirmed that 7.1.0 is fine.
It is indeed. As can be seen in my comment #4, this was fixed somewhere before
14th of November 2016, well before GCC 7 release.
Best regards.
>From gcc-bugs-return-574452-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 14:21:58 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/82120] FAIL: gcc.dg/tree-ssa/pr81588.c
Date: Wed, 06 Sep 2017 14:21:00 -0000
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is a total mess. I've copied a boilerplate from other tests that require
branch cost of 2.
I guess
2017-09-06 Jakub Jelinek <jakub@redhat.com>
PR testsuite/82120
* gcc.dg/tree-ssa/pr81588.c: Don't run on logical_op_short_circuit
targets.
--- gcc/testsuite/gcc.dg/tree-ssa/pr81588.c.jj 2017-08-02 12:10:36.000000000
+0200
+++ gcc/testsuite/gcc.dg/tree-ssa/pr81588.c 2017-09-06 16:09:57.373505808
+0200
@@ -1,5 +1,5 @@
/* PR tree-optimization/81588 */
-/* { dg-do compile { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-*
moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-*
hppa*-*-* nios2*-*-*" } } } */
+/* { dg-do compile { target { ! { logical_op_short_circuit || { m68k*-*-*
bfin*-*-* v850*-*-* moxie*-*-* m32c*-*-* fr30*-*-* mcore*-*-* xtensa*-*-*
hppa*-*-* } } } } } */
/* { dg-options "-O2 -fdump-tree-reassoc1-details" } */
/* { dg-additional-options "-mbranch-cost=2" { target mips*-*-* avr-*-*
s390*-*-* i?86-*-* x86_64-*-* } } */
could fix that, but that will mean it will be untested even on mips, avr and
s390 when it could be tested there.
So perhaps better:
2017-09-06 Jakub Jelinek <jakub@redhat.com>
PR testsuite/82120
* gcc.dg/tree-ssa/pr81588.c: Don't run on logical_op_short_circuit
targets
except for those where -mbranch-cost=2 is supported.
--- gcc/testsuite/gcc.dg/tree-ssa/pr81588.c.jj 2017-08-02 12:10:36.000000000
+0200
+++ gcc/testsuite/gcc.dg/tree-ssa/pr81588.c 2017-09-06 16:17:30.563118589
+0200
@@ -1,5 +1,5 @@
/* PR tree-optimization/81588 */
-/* { dg-do compile { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-*
moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-*
hppa*-*-* nios2*-*-*" } } } */
+/* { dg-do compile { target { ! { { logical_op_short_circuit && { ! "mips*-*-*
avr-*-* s390*-*-*" } } || { m68k*-*-* bfin*-*-* v850*-*-* moxie*-*-* m32c*-*-*
fr30*-*-* mcore*-*-* xtensa*-*-* hppa*-*-* } } } } } */
/* { dg-options "-O2 -fdump-tree-reassoc1-details" } */
/* { dg-additional-options "-mbranch-cost=2" { target mips*-*-* avr-*-*
s390*-*-* i?86-*-* x86_64-*-* } } */
Can you test it on the various arm configurations (just make check-gcc
RUNTESTFLAGS=tree-ssa.exp=pr81588.c)?
Wonder about the targets that aren't included in logical_op_short_circuit, what
they actually do and why they are in the lists in the other testcases.
>From gcc-bugs-return-574453-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 14:28:12 2017
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Subject: [Bug c++/78269] FAIL: FAIL: g++.dg/cpp1z/noexcept-type11.C and FAIL: g++.dg/cpp1z/noexcept-type9.C
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--- Comment #10 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Thomas Preud'homme from comment #9)
> (In reply to Paolo Carlini from comment #8)
> > Confirmed that 7.1.0 is fine.
>
> It is indeed. As can be seen in my comment #4, this was fixed somewhere
> before 14th of November 2016, well before GCC 7 release.
>
> Best regards.
Exact revision that fixed the bug on ARM is: r242026
>From gcc-bugs-return-574454-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 14:39:40 2017
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Subject: [Bug testsuite/82120] FAIL: gcc.dg/tree-ssa/pr81588.c
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--- Comment #3 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> This is a total mess. I've copied a boilerplate from other tests that
> require branch cost of 2.
> I guess
> 2017-09-06 Jakub Jelinek <jakub@redhat.com>
>
> PR testsuite/82120
> * gcc.dg/tree-ssa/pr81588.c: Don't run on logical_op_short_circuit targets.
>
> --- gcc/testsuite/gcc.dg/tree-ssa/pr81588.c.jj 2017-08-02 12:10:36.000000000
> +0200
> +++ gcc/testsuite/gcc.dg/tree-ssa/pr81588.c 2017-09-06 16:09:57.373505808
> +0200
> @@ -1,5 +1,5 @@
> /* PR tree-optimization/81588 */
> -/* { dg-do compile { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-*
> moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-*
> hppa*-*-* nios2*-*-*" } } } */
> +/* { dg-do compile { target { ! { logical_op_short_circuit || { m68k*-*-*
> bfin*-*-* v850*-*-* moxie*-*-* m32c*-*-* fr30*-*-* mcore*-*-* xtensa*-*-*
> hppa*-*-* } } } } } */
> /* { dg-options "-O2 -fdump-tree-reassoc1-details" } */
> /* { dg-additional-options "-mbranch-cost=2" { target mips*-*-* avr-*-*
> s390*-*-* i?86-*-* x86_64-*-* } } */
>
> could fix that, but that will mean it will be untested even on mips, avr and
> s390 when it could be tested there.
>
> So perhaps better:
> 2017-09-06 Jakub Jelinek <jakub@redhat.com>
>
> PR testsuite/82120
> * gcc.dg/tree-ssa/pr81588.c: Don't run on logical_op_short_circuit targets
> except for those where -mbranch-cost=2 is supported.
>
> --- gcc/testsuite/gcc.dg/tree-ssa/pr81588.c.jj 2017-08-02 12:10:36.000000000
> +0200
> +++ gcc/testsuite/gcc.dg/tree-ssa/pr81588.c 2017-09-06 16:17:30.563118589
> +0200
> @@ -1,5 +1,5 @@
> /* PR tree-optimization/81588 */
> -/* { dg-do compile { target { ! "m68k*-*-* mmix*-*-* bfin*-*-* v850*-*-*
> moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-* powerpc*-*-* xtensa*-*-*
> hppa*-*-* nios2*-*-*" } } } */
> +/* { dg-do compile { target { ! { { logical_op_short_circuit && { !
> "mips*-*-* avr-*-* s390*-*-*" } } || { m68k*-*-* bfin*-*-* v850*-*-*
> moxie*-*-* m32c*-*-* fr30*-*-* mcore*-*-* xtensa*-*-* hppa*-*-* } } } } } */
> /* { dg-options "-O2 -fdump-tree-reassoc1-details" } */
> /* { dg-additional-options "-mbranch-cost=2" { target mips*-*-* avr-*-*
> s390*-*-* i?86-*-* x86_64-*-* } } */
>
>
> Can you test it on the various arm configurations (just make check-gcc
> RUNTESTFLAGS=tree-ssa.exp=pr81588.c)?
> Wonder about the targets that aren't included in logical_op_short_circuit,
> what they actually do and why they are in the lists in the other testcases.
I've tested it for a variety of Arm Cortex-M and Cortex-A cores and it either
PASS or is marked as UNSUPPORTED so looks good to me, thanks.
Best regards.
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Subject: [Bug testsuite/82120] FAIL: gcc.dg/tree-ssa/pr81588.c
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Sep 6 15:10:28 2017
New Revision: 251806
URL: https://gcc.gnu.org/viewcvs?rev=251806&root=gcc&view=rev
Log:
PR testsuite/82120
* gcc.dg/tree-ssa/pr81588.c: Don't run on logical_op_short_circuit
targets except for those where -mbranch-cost=2 is supported.
Modified:
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gcc.dg/tree-ssa/pr81588.c
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82121] [7/8 Regression] Unclassifiable statement during compilation when assigning to a Character array in a derived type contained in a ASSOCIATE statement
Date: Wed, 06 Sep 2017 15:28:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P4
Status|UNCONFIRMED |NEW
Known to work| |6.4.0
Keywords| |rejects-valid
Last reconfirmed| |2017-09-06
CC| |pault at gcc dot gnu.org
Ever confirmed|0 |1
Summary|Unclassifiable statement |[7/8 Regression]
|during compilation when |Unclassifiable statement
|assigning to a Character |during compilation when
|array in a derived type |assigning to a Character
|contained in a ASSOCIATE |array in a derived type
|statement |contained in a ASSOCIATE
| |statement
Known to fail| |7.2.0, 8.0
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed, likely r241860 (pr64933).
>From gcc-bugs-return-574457-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 15:41:53 2017
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From: "arnd at linaro dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/82123] New: [7 regression] spurious -Wformat-overflow warning for converted vars
Date: Wed, 06 Sep 2017 15:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82123
Bug ID: 82123
Summary: [7 regression] spurious -Wformat-overflow warning for
converted vars
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: arnd at linaro dot org
Target Milestone: ---
This one seems to be related to pr77721 and pr81483. The first however only
happens with -Wformat-overflow=2, and the second one has no type conversion, so
I'm opening a separate pr for this one. Reproduced with gcc-7.1.1 and gcc-8.0.0
(r251692).
$ x86_64-linux-gcc-8.0.0 -c gpiolib-acpi.c -O2 -Wformat-overflow=1
gpiolib-acpi.c: In function 'acpi_gpiochip_request_interrupt':
gpiolib-acpi.c:7:28: warning: '%02X' directive writing between 2 and 4 bytes
into a region of size 3 [-Wformat-overflow=]
__builtin_sprintf(name, "%02X", pin);
^~~~
gpiolib-acpi.c:7:27: note: directive argument in the range [0, 65535]
__builtin_sprintf(name, "%02X", pin);
^~~~~~
gpiolib-acpi.c:7:3: note: '__builtin_sprintf' output between 3 and 5 bytes into
a destination of size 3
__builtin_sprintf(name, "%02X", pin);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8<----
void acpi_gpiochip_request_interrupt(unsigned short s)
{
char name[3];
unsigned int pin = s;
if (pin <= 255)
__builtin_sprintf(name, "%02X", pin);
}
>From gcc-bugs-return-574458-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 16:12:28 2017
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From: "jupitercuso4 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82067] G++ has an internal compiler error in possible_polymorphic_call_targets, at ipa-devirt.c:1557
Date: Wed, 06 Sep 2017 16:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82067
--- Comment #5 from jupitercuso4 at gmail dot com ---
$ g++ -std=c++11 -O3 --save-temps test.i
test.cpp: In constructor
'xtsc_component::xtsc_queue_pin::xtsc_queue_pin(sc_core::sc_module_name, const
xtsc_component::xtsc_queue_pin_parms&)':
test.cpp:32:1: internal compiler error: in possible_polymorphic_call_targets,
at ipa-devirt.c:1557
xtsc_component::xtsc_queue_pin::xtsc_queue_pin(sc_module_name module_name,
const xtsc_queue_pin_parms& queue_parms) :
^
0x6828cb possible_polymorphic_call_targets(tree_node*, long,
ipa_polymorphic_call_context, bool*, void**, int*)
../../gcc-4.9.4/gcc/ipa-devirt.c:1557
0x665cea possible_polymorphic_call_targets(tree_node*, bool*, void**)
../../gcc-4.9.4/gcc/ipa-utils.h:142
0xc87198 gimple_fold_call
../../gcc-4.9.4/gcc/gimple-fold.c:1127
0xc87198 fold_stmt_1
../../gcc-4.9.4/gcc/gimple-fold.c:1302
0xd909b8 fold_marked_statements
../../gcc-4.9.4/gcc/tree-inline.c:4549
0xd8c2e0 optimize_inline_calls(tree_node*)
../../gcc-4.9.4/gcc/tree-inline.c:4630
0xf48b89 inline_transform(cgraph_node*)
../../gcc-4.9.4/gcc/ipa-inline-transform.c:457
0xd1b58a execute_one_ipa_transform_pass
../../gcc-4.9.4/gcc/passes.c:2066
0xd1b58a execute_all_ipa_transforms()
../../gcc-4.9.4/gcc/passes.c:2107
0xbd8abd expand_function
../../gcc-4.9.4/gcc/cgraphunit.c:1775
0xf99653 expand_all_functions
../../gcc-4.9.4/gcc/cgraphunit.c:1916
0xf99653 compile()
../../gcc-4.9.4/gcc/cgraphunit.c:2260
0xf98f17 finalize_compilation_unit()
../../gcc-4.9.4/gcc/cgraphunit.c:2337
0xb149dd cp_write_global_declarations()
../../gcc-4.9.4/gcc/cp/decl2.c:4647
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-574459-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 16:14:20 2017
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Subject: [Bug libstdc++/77726] On MinGW targets, user-defined `operator delete(void *)` is not called if the sized-deallocation version is not provided in C++14 mode when libstdc++ is linked dynamically
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=81413
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Replacing new/delete doesn't work properly on mingw.
>From gcc-bugs-return-574460-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 16:14:45 2017
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Subject: [Bug libstdc++/77726] On MinGW targets, user-defined `operator delete(void *)` is not called if the sized-deallocation version is not provided in C++14 mode when libstdc++ is linked dynamically
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----------------------------------------------------------------------------
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Subject: [Bug libstdc++/81413] overloaded new and delete might not be called when dynamically linked with libstdc++
Date: Wed, 06 Sep 2017 16:16:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |drizt at land dot ru
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
*** Bug 82122 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-574461-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 16:16:23 2017
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Subject: [Bug libstdc++/82122] Overloaded operator new/delete in MinGW is not calling from .dlls
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
.
*** This bug has been marked as a duplicate of bug 81413 ***
>From gcc-bugs-return-574463-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 16:35:33 2017
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Subject: [Bug middle-end/78468] [8 regression] libgomp.c/reduction-10.c and many more FAIL
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--- Comment #43 from Wilco <wilco at gcc dot gnu.org> ---
Author: wilco
Date: Wed Sep 6 16:34:54 2017
New Revision: 251811
URL: https://gcc.gnu.org/viewcvs?rev=251811&root=gcc&view=rev
Log:
PR78468 - add alloca alignment test
Add an alignment test to check that aligned alloca's really do get
correctly aligned. Some targets may not ensure SP is always a multiple
of STACK_BOUNDARY (particularly with outgoing arguments), which means
aligned alloca does not get correctly aligned. This can be fixed either
by aligning the outgoing arguments or setting STACK_BOUNDARY correctly.
testsuite/
PR middle-end/78468
* gcc.dg/pr78468.c: Add alignment test.
Added:
trunk/gcc/testsuite/gcc.dg/pr78468.c
Modified:
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug libstdc++/77726] On MinGW targets, user-defined `operator delete(void *)` is not called if the sized-deallocation version is not provided in C++14 mode when libstdc++ is linked dynamically
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--- Comment #2 from Liu Hao <lh_mouse at 126 dot com> ---
It isn't weired if you know how a Dynamic-Link Library (DLL) on Windows works
different than a Shared Object (SO) on Linux.
Windows does not have a dynamic linker such as `ld.so` on Linux. Symbols in a
DLL are resolved at build-time, in contrary to Linux, where symbols in a SO are
resolved at load-time. The DLL loader can resolve symbols to addresses, but it
isn't as powerful as linkers after all. Consequently, an executable cannot use
its strong symbols to override already-resolved weak ones in a DLL.
If the user does not define a sized deallocation function, the default one in
libstdc++*.dll is used, which calls the weak, default, non-sized deallocation
function in the same DLL, which is the only candidate when the DLL is built and
can't be overridden.
Possible solution:
The default sized deallocation function should not call the non-sized one
directly. We may introduce a static pointer-to-function which points to the
non-sized one initially. The default sized deallocation function should read
that pointer then call the function it points to. An executable that defines a
non-sized deallocation function should modify that pointer to point to the
user-provided non-sized deallocation function before any other code that may
allocate dynamic memory, possibly via an implicitly generated __constructor__
with high priority.
Question:
What will happen if both the executable and another DLL try to replace the
non-sized deallocation function?
It looks to me that on Linux such scenario will end up in multiple definitions.
In this case abort() or std::terminate() is possibly solution.
>From gcc-bugs-return-574465-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 18:11:56 2017
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Subject: [Bug c++/82070] [8 Regression] inaccessible within this context in lambda rejects valid
Date: Wed, 06 Sep 2017 18:11:00 -0000
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-09-06
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Ever confirmed|0 |1
>From gcc-bugs-return-574466-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 18:43:38 2017
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Subject: [Bug tree-optimization/81987] [8 Regression] ICE in verify_ssa with -O3 -march=skylake-avx512
Date: Wed, 06 Sep 2017 18:43:00 -0000
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--- Comment #9 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Wed Sep 6 18:42:56 2017
New Revision: 251815
URL: https://gcc.gnu.org/viewcvs?rev=251815&root=gcc&view=rev
Log:
[gcc]
2017-09-06 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline:
2017-08-30 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/81987
* gimple-ssa-strength-reduction.c (insert_initializers): Don't
insert an initializer in a location not dominated by the stride
definition.
[gcc/testsuite]
2017-09-06 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline:
2017-08-30 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/81987
* g++.dg/torture/pr81987.C: New file.
Added:
branches/gcc-7-branch/gcc/testsuite/g++.dg/torture/pr81987.C
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/gimple-ssa-strength-reduction.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-574467-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 18:45:34 2017
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Subject: [Bug tree-optimization/81987] [8 Regression] ICE in verify_ssa with -O3 -march=skylake-avx512
Date: Wed, 06 Sep 2017 18:45:00 -0000
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--- Comment #10 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Wed Sep 6 18:44:51 2017
New Revision: 251816
URL: https://gcc.gnu.org/viewcvs?rev=251816&root=gcc&view=rev
Log:
[gcc]
2017-09-06 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline:
2017-08-30 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/81987
* gimple-ssa-strength-reduction.c (insert_initializers): Don't
insert an initializer in a location not dominated by the stride
definition.
[gcc/testsuite]
2017-09-06 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline:
2017-08-30 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/81987
* g++.dg/torture/pr81987.C: New file.
Added:
branches/gcc-6-branch/gcc/testsuite/g++.dg/torture/pr81987.C
Modified:
branches/gcc-6-branch/gcc/ChangeLog
branches/gcc-6-branch/gcc/gimple-ssa-strength-reduction.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-574468-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 18:49:28 2017
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Subject: [Bug tree-optimization/81987] [8 Regression] ICE in verify_ssa with -O3 -march=skylake-avx512
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--- Comment #11 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Wed Sep 6 18:48:50 2017
New Revision: 251817
URL: https://gcc.gnu.org/viewcvs?rev=251817&root=gcc&view=rev
Log:
[gcc]
2017-09-06 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline:
2017-08-30 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/81987
* gimple-ssa-strength-reduction.c (insert_initializers): Don't
insert an initializer in a location not dominated by the stride
definition.
[gcc/testsuite]
2017-09-06 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline:
2017-08-30 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR tree-optimization/81987
* g++.dg/torture/pr81987.C: New file.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/torture/pr81987.C
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/gimple-ssa-strength-reduction.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-574469-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 18:50:08 2017
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Subject: [Bug tree-optimization/81987] [8 Regression] ICE in verify_ssa with -O3 -march=skylake-avx512
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Bill Schmidt <wschmidt at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #12 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Now fixed everywhere. Thanks again for the report!
>From gcc-bugs-return-574470-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 18:59:11 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/79433] __has_include(<new header>) is true but #include <new header> gives #error when -std=old
Date: Wed, 06 Sep 2017 18:59:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
--- Comment #24 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The study group has approved the idea in comment 23 so I'm making that change
(on trunk only so far).
>From gcc-bugs-return-574471-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 19:24:41 2017
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82080] ICE: Segmentation fault
Date: Wed, 06 Sep 2017 19:24:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-06
CC| |egallager at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
Turns out the issue was with my compiler version; after updating from an August
checkout to a September checkout, I can reproduce the ICE with both -m64 and
-m32. Confirmed.
>From gcc-bugs-return-574472-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 19:37:25 2017
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Subject: [Bug c++/82070] [8 Regression] inaccessible within this context in lambda rejects valid
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82070
--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Wed Sep 6 19:36:48 2017
New Revision: 251819
URL: https://gcc.gnu.org/viewcvs?rev=251819&root=gcc&view=rev
Log:
PR c++/82070 - error with nested lambda capture
* pt.c (tsubst_expr) [DECL_EXPR]: Register capture proxies with
register_local_specialization.
Added:
trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-nested7.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/pt.c
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Subject: [Bug libgomp/82124] New: FAIL: libgomp.c++/pr69393.C (test for excess errors)
Date: Wed, 06 Sep 2017 19:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82124
Bug ID: 82124
Summary: FAIL: libgomp.c++/pr69393.C (test for excess errors)
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: openmp
Severity: normal
Priority: P3
Component: libgomp
Assignee: unassigned at gcc dot gnu.org
Reporter: egallager at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
Target Milestone: ---
Host: i386-apple-darwin9.8.0
Target: i386-apple-darwin9.8.0
Build: i386-apple-darwin9.8.0
Diffing https://gcc.gnu.org/ml/gcc-testresults/2017-08/msg00882.html and
https://gcc.gnu.org/ml/gcc-testresults/2017-09/msg00470.html shows that a new
libgomp test failure was introduced between August and September:
Running target unix
+FAIL: libgomp.c++/pr69393.C (test for excess errors)
=== libgomp Summary ===
-# of expected passes 1788
+# of expected passes 1789
+# of unexpected failures 1
# of unsupported tests 208
Checking libgomp/testsuite/libgomp.log, the excess errors are:
FAIL: libgomp.c++/pr69393.C (test for excess errors)
Excess errors:
/var/tmp//ccWCqG7a.s:303:non-relocatable subtraction expression,
"_pr69393.C.a48af4a2" minus "Lsection__debug_info"
/var/tmp//ccWCqG7a.s:303:symbol: "_pr69393.C.a48af4a2" can't be undefined in a
subtraction expression
/var/tmp//ccWCqG7a.s:300:non-relocatable subtraction expression,
"_pr69393.C.a48af4a2" minus "Lsection__debug_info"
/var/tmp//ccWCqG7a.s:300:symbol: "_pr69393.C.a48af4a2" can't be undefined in a
subtraction expression
/var/tmp//ccWCqG7a.s:298:non-relocatable subtraction expression,
"_pr69393.C.a48af4a2" minus "Lsection__debug_info"
/var/tmp//ccWCqG7a.s:298:symbol: "_pr69393.C.a48af4a2" can't be undefined in a
subtraction expression
/var/tmp//ccWCqG7a.s:296:non-relocatable subtraction expression,
"_pr69393.C.a48af4a2" minus "Lsection__debug_info"
/var/tmp//ccWCqG7a.s:296:symbol: "_pr69393.C.a48af4a2" can't be undefined in a
subtraction expression
/var/tmp//ccWCqG7a.s:289:non-relocatable subtraction expression,
"_pr69393.C.a48af4a2" minus "Lsection__debug_info"
/var/tmp//ccWCqG7a.s:289:symbol: "_pr69393.C.a48af4a2" can't be undefined in a
subtraction expression
/var/tmp//ccWCqG7a.s:282:non-relocatable subtraction expression,
"_pr69393.C.a48af4a2" minus "Lsection__debug_info"
/var/tmp//ccWCqG7a.s:282:symbol: "_pr69393.C.a48af4a2" can't be undefined in a
subtraction expression
/var/tmp//ccWCqG7a.s:276:non-relocatable subtraction expression,
"_pr69393.C.a48af4a2" minus "Lsection__debug_info"
/var/tmp//ccWCqG7a.s:276:symbol: "_pr69393.C.a48af4a2" can't be undefined in a
subtraction expression
/var/tmp//ccWCqG7a.s:270:non-relocatable subtraction expression,
"_pr69393.C.a48af4a2" minus "Lsection__debug_info"
/var/tmp//ccWCqG7a.s:270:symbol: "_pr69393.C.a48af4a2" can't be undefined in a
subtraction expression
/var/tmp//ccWCqG7a.s:265:non-relocatable subtraction expression,
"_pr69393.C.a48af4a2" minus "Lsection__debug_info"
/var/tmp//ccWCqG7a.s:265:symbol: "_pr69393.C.a48af4a2" can't be undefined in a
subtraction expression
/var/tmp//ccWCqG7a.s:258:non-relocatable subtraction expression,
"_pr69393.C.a48af4a2" minus "Lsection__debug_info"
/var/tmp//ccWCqG7a.s:258:symbol: "_pr69393.C.a48af4a2" can't be undefined in a
subtraction expression
/var/tmp//ccWCqG7a.s:256:non-relocatable subtraction expression,
"_pr69393.C.a48af4a2" minus "Lsection__debug_info"
/var/tmp//ccWCqG7a.s:256:symbol: "_pr69393.C.a48af4a2" can't be undefined in a
subtraction expression
lto-wrapper: fatal error: /var/root/gcc-git/my_oddly_named_builddir/gcc/xgcc
returned 1 exit status
compilation terminated.
collect2: fatal error: lto-wrapper returned 1 exit status
compilation terminated.
I attached the full logfile. Version info:
$ /usr/local/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/i386-apple-darwin9.8.0/8.0.0/lto-wrapper
Target: i386-apple-darwin9.8.0
Configured with: ../configure --disable-werror --disable-werror-always
--enable-languages=c,c++,lto,objc,obj-c++ --enable-stage1-checking=release,rtl
-C --with-system-libunwind --enable-secureplt --enable-frame-pointer
--enable-debug --with-isl --disable-host-shared --enable-maintainer-mode
--disable-default-pie --with-ld64 --without-pic --enable-target-optspace
--enable-libstdcxx-debug CC=/usr/local/bin/gcc CXX=/usr/local/bin/g++
AUTOCONF=/usr/local/bin/autoconf AUTOHEADER=/usr/local/bin/autoheader
AUTORECONF=/usr/local/bin/autoreconf AUTOM4TE=/usr/local/bin/autom4te
AUTOSCAN=/usr/local/bin/autoscan AUTOUPDATE=/usr/local/bin/autoupdate
IFNAMES=/usr/local/bin/ifnames
Thread model: posix
gcc version 8.0.0 20170905 (experimental) (GCC)
$
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Subject: [Bug libgomp/82124] FAIL: libgomp.c++/pr69393.C (test for excess errors)
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Created attachment 42138
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42138&action=edit
bzipped libgomp.log
Oops, the log was too big to attach on its own; trying again after compressing
it...
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Subject: [Bug libgomp/82124] FAIL: libgomp.c++/pr69393.C (test for excess errors)
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--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
Created attachment 42139
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42139&action=edit
Full testresults diff
(attaching the full diff between the 2 test logs to remind myself to open other
bugs for the other new failures)
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Subject: [Bug c++/82070] [8 Regression] inaccessible within this context in lambda rejects valid
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Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-574477-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Sep 06 19:59:09 2017
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Subject: [Bug c++/69953] [5/6 Regression] Using lto causes gtkmm/gparted and gtkmm/inkscape compile to fail
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--- Comment #37 from Andreas K. Huettel <dilfridge at gentoo dot org> ---
Created attachment 42140
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gparted build log
Here's the build log from my Gentoo colleague.
If you need more, please tell me precisely what - I dont have that much
experience reporting here yet. Can't reopen the bug either.
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Subject: [Bug c++/82125] New: Suboptimal error message for range-based for
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Bug ID: 82125
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void meow() {
int a[3][4];
for(const auto r : a)
for(auto e : r) {}
}
This emits
prog.cc: In function 'void meow()':
prog.cc:4:22: error: 'begin' was not declared in this scope
for(auto e : r) {}
^
prog.cc:4:22: error: 'end' was not declared in this scope
which, while not inaccurate, isn't helpful either. There is literally no scope
in which begin/end can be looked up, because int* has no associated namespace
whatsoever.
Moreover, if some begin/end is around - say, via #include <iterator> - then we
get a list of "suggested alternatives". But that seems even less helpful since
the form of the call is hard-coded in the language and isn't something the
programmer has any control over.
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Subject: [Bug c++/82053] [8 Regression] ICE on invalid code
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Jason Merrill <jason at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-574480-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 01:03:24 2017
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Subject: [Bug c++/82053] [8 Regression] ICE on invalid code
Date: Thu, 07 Sep 2017 01:03:00 -0000
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--- Comment #2 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Thu Sep 7 01:02:46 2017
New Revision: 251826
URL: https://gcc.gnu.org/viewcvs?rev=251826&root=gcc&view=rev
Log:
PR c++/82053 - ICE with default argument in lambda in template
* pt.c (tsubst_arg_types): Substitute default arguments for lambdas
in templates.
(retrieve_specialization): Use lambda_fn_in_template_p.
* cp-tree.h: Declare it.
Added:
trunk/gcc/testsuite/g++.dg/cpp1y/lambda-defarg7.C
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/pt.c
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Subject: [Bug c++/81640] [8 Regression] ICE in lookup_fnfields_slot_nolazy w/ -Wshadow=compatible-local
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
So, fixed.
>From gcc-bugs-return-574482-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 01:17:57 2017
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Subject: [Bug c++/70029] [8 Regression] ICE with C++11 and -flto
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Jason Merrill <jason at gcc dot gnu.org> changed:
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>From gcc-bugs-return-574483-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 01:32:37 2017
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Subject: [Bug c++/70029] [8 Regression] ICE with C++11 and -flto
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--- Comment #13 from Jason Merrill <jason at gcc dot gnu.org> ---
I believe r241831 fixed the actual problem that verify_type was catching. This
still fails because free_lang_data_in_type clears TYPE_LANG_FLAG_4 on 't' but
not 'ct'. Should something have added TYPE_CANONICAL to fld.types?
>From gcc-bugs-return-574484-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 01:52:08 2017
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Subject: [Bug middle-end/81318] [8 regression] ICE in to_reg_br_prob_base, at profile-count.h:189
Date: Thu, 07 Sep 2017 01:52:00 -0000
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Daniel Black <daniel.black at au dot ibm.com> changed:
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--- Comment #25 from Daniel Black <daniel.black at au dot ibm.com> ---
Also getting this on linux kernel 4.13 release on gcc master branch but not
gcc-7:
There are at least two locations that generate this backtrace.
gcc -O1 -c -o drivers/scsi/mpt3sas/.tmp_mpt3sas_scsih.o ./mpt3sas_scsih.i
during GIMPLE pass: profile_estimate
drivers/scsi/mpt3sas/mpt3sas_scsih.c: In function ‘mpt3sas_scsih_issue_tm’:
drivers/scsi/mpt3sas/mpt3sas_scsih.c:9455:1: internal compiler error: in
to_reg_br_prob_base, at profile-count.h:189
module_exit(_mpt3sas_exit);
^~~~~~
0x1085d55f profile_probability::to_reg_br_prob_base() const
../../gcc/profile-count.h:189
0x1085d55f estimate_bb_frequencies(bool)
../../gcc/predict.c:3570
0x10861123 tree_estimate_probability(bool)
../../gcc/predict.c:2827
0x1086165f execute
../../gcc/predict.c:3712
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.
Simplest ICE generation is -O1. -O0 gets to code errors.
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Subject: [Bug c/54113] -Wmissing-prototypes produces false alarms for C99 inline functions
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Paul Eggert from comment #0)
>
> The simplest way to work around the problem is to avoid
> the use of -Wmissing-prototypes, but that disables the
> diagnostic for non-inline functions, where it's useful.
>
Note that this only works for plain C; using diagnostic pragmas (like those
expanded from gnulib's _GL_INLINE_HEADER_BEGIN) to suppress
-Wmissing-prototypes leads to the following warning in C++:
build-gnulib/../config.h:2101:5: warning: option ‘-Wmissing-prototypes’ is
valid for C/ObjC but not for C++ [-Wpragmas]
_Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
^~~~~~~
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Subject: [Bug middle-end/82123] [7 regression] spurious -Wformat-overflow warning for converted vars
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2017-09-07
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-574487-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 05:03:30 2017
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Subject: [Bug c++/82110] Concept for default constructing works with new T, not with new T[1]
Date: Thu, 07 Sep 2017 05:03:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Last reconfirmed| |2017-09-07
CC| |egallager at gcc dot gnu.org
Blocks| |67491
Ever confirmed|0 |1
--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
Confirmed that g++ errors where you say it does:
$ /usr/local/bin/g++ -c -fconcepts -std=c++1z 82110.cc
82110.cc: In function ‘int main()’:
82110.cc:17:5: error: static assertion failed
static_assert(!D<X>); // error
^~~~~~~~~~~~~
$
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491
[Bug 67491] [meta-bug] concepts issues
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81066
--- Comment #18 from Matthias Klose <doko at gcc dot gnu.org> ---
Author: doko
Date: Thu Sep 7 07:15:24 2017
New Revision: 251828
URL: https://gcc.gnu.org/viewcvs?rev=251828&root=gcc&view=rev
Log:
2017-09-07 Matthias Klose <doko@ubuntu.com>
Backported from mainline
2017-07-14 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/81066
* sanitizer_common/sanitizer_linux.h: Cherry-pick upstream r307969.
* sanitizer_common/sanitizer_linux.cc: Likewise.
* sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc: Likewise.
* tsan/tsan_platform_linux.cc: Likewise.
Modified:
branches/gcc-6-branch/libsanitizer/ChangeLog
branches/gcc-6-branch/libsanitizer/sanitizer_common/sanitizer_linux.cc
branches/gcc-6-branch/libsanitizer/sanitizer_common/sanitizer_linux.h
branches/gcc-6-branch/libsanitizer/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
branches/gcc-6-branch/libsanitizer/tsan/tsan_platform_linux.cc
>From gcc-bugs-return-574489-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 07:17:54 2017
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81066
--- Comment #19 from Matthias Klose <doko at gcc dot gnu.org> ---
Author: doko
Date: Thu Sep 7 07:17:17 2017
New Revision: 251829
URL: https://gcc.gnu.org/viewcvs?rev=251829&root=gcc&view=rev
Log:
2017-09-07 Matthias Klose <doko@ubuntu.com>
Backported from mainline
2017-07-14 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/81066
* sanitizer_common/sanitizer_linux.h: Cherry-pick upstream r307969.
* sanitizer_common/sanitizer_linux.cc: Likewise.
* sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc: Likewise.
* tsan/tsan_platform_linux.cc: Likewise.
Modified:
branches/gcc-5-branch/libsanitizer/ChangeLog
branches/gcc-5-branch/libsanitizer/sanitizer_common/sanitizer_linux.cc
branches/gcc-5-branch/libsanitizer/sanitizer_common/sanitizer_linux.h
branches/gcc-5-branch/libsanitizer/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
branches/gcc-5-branch/libsanitizer/tsan/tsan_platform_linux.cc
>From gcc-bugs-return-574490-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 07:19:17 2017
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Subject: [Bug middle-end/82123] [7/8 regression] spurious -Wformat-overflow warning for converted vars
Date: Thu, 07 Sep 2017 07:19:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82123
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
Target Milestone|--- |7.3
Summary|[7 regression] spurious |[7/8 regression] spurious
|-Wformat-overflow warning |-Wformat-overflow warning
|for converted vars |for converted vars
Known to fail| |7.1.1
>From gcc-bugs-return-574491-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 07:21:14 2017
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Subject: [Bug libgomp/82124] FAIL: libgomp.c++/pr69393.C (test for excess errors)
Date: Thu, 07 Sep 2017 07:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think this is a dup, the testcase uses -flto.
*** This bug has been marked as a duplicate of bug 82005 ***
>From gcc-bugs-return-574492-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 07:21:15 2017
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Subject: [Bug target/82005] [8 regression] early lto debug creates invalid assembly on Darwin
Date: Thu, 07 Sep 2017 07:21:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 82124 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-574493-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 07:50:50 2017
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug testsuite/82120] FAIL: gcc.dg/tree-ssa/pr81588.c
Date: Thu, 07 Sep 2017 07:50:00 -0000
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Christophe Lyon <clyon at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |clyon at gcc dot gnu.org
--- Comment #5 from Christophe Lyon <clyon at gcc dot gnu.org> ---
(In reply to Thomas Preud'homme from comment #3)
> I've tested it for a variety of Arm Cortex-M and Cortex-A cores and it
> either PASS or is marked as UNSUPPORTED so looks good to me, thanks.
>
In my testing, Jakub's patch (r251806) indeed made the test UNSUPPORTED for
arm-none-eabi/--with-cpu=cortex-m3.
However, for arm-none-linux-gnueabihf --with-cpu=cortex-a5
--with-fpu=vfpv3-d16-fp16, I still have:
FAIL: gcc.dg/tree-ssa/pr81588.c scan-tree-dump-times reassoc1 "Optimizing range
test [^\n\r]* and comparison" 1
>From gcc-bugs-return-574494-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 08:49:47 2017
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Subject: [Bug testsuite/82120] FAIL: gcc.dg/tree-ssa/pr81588.c
Date: Thu, 07 Sep 2017 08:49:00 -0000
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Doesn't cortex-a5 also force BRANCH_COST of 1? If yes, you should fix up
logical_op_short_circuit tcl function. If not, then I have no idea why that
happens.
>From gcc-bugs-return-574495-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 09:01:41 2017
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From: "ro at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug ada/82126] New: [8 regression] gnat.dg/alignment3.adb FAILs
Date: Thu, 07 Sep 2017 09:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82126
Bug ID: 82126
Summary: [8 regression] gnat.dg/alignment3.adb FAILs
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: ebotcazou at gcc dot gnu.org
Target Milestone: ---
Target: sparc-sun-solaris2.12, ia64-suse-linux-gnu
Between 20170905 (r251718) and 20170906 (r251809), the gnat.dg/alignment3.adb
test began to FAIL
FAIL: gnat.dg/alignment3.adb (test for excess errors)
Excess errors:
alignment3.adb:30:49: warning: source alignment (1) < alignment of "Natural"
(4)
I'm seeing it on both 32 and 64-bit SPARC, according to gcc-testresults, the
test
also FAILs on IA-64.
Rainer
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Subject: [Bug ada/82126] [8 regression] gnat.dg/alignment3.adb FAILs
Date: Thu, 07 Sep 2017 09:03:00 -0000
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Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
>From gcc-bugs-return-574497-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 09:05:18 2017
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From: "rjvbertin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80781] Feature request: build option to use libc++ instead of libstdc++ for increased usability on Mac
Date: Thu, 07 Sep 2017 09:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80781
--- Comment #9 from René J.V. Bertin <rjvbertin at gmail dot com> ---
redi at gcc dot gnu.org wrote on 20170517::08:56:33 re: "[Bug target/80781]
Feature request: build option to use libc++ instead of libstdc++ for increased
usability on Mac"
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80781
>> Meaning "that G++ will one day have this kind of support for libc++"? Is
>> there a timeline or something?
>
>No. Somebody has to do the work. It will get into GCC if somebody does the
>work, but not before then.
What's the most efficient way (recipe) to end up with a build dir in which one
can do incremental builds (= regular development)? The build script I've been
using until now doesn't allow this reliably, forcing me to go through the whole
3-pass build each time. With efficient I here mean both in time and in terms of
disk footprint.
I'd expect that one ought to be able to rebuild GCC x.y.z from its own sources
in a single pass because it's already proven to be able to do that, so is it
possible to create a clean 1-pass build directory, configure and build it to
develop smallish modifications to the driver like we're discussing here?
>From gcc-bugs-return-574498-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 09:24:08 2017
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Subject: [Bug ada/82127] New: [8 regression] gnat.dg/specs/constructor.ads FAILs
Date: Thu, 07 Sep 2017 09:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82127
Bug ID: 82127
Summary: [8 regression] gnat.dg/specs/constructor.ads FAILs
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
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Target Milestone: ---
Target: sparc-sun-solaris2.12, ia64-suse-linux-gnu
Between 20170905 (r251718) and 20170906 (r251809),
gnat.dg/specs/constructor.ads
started to FAIL
FAIL: gnat.dg/specs/constructor.ads (internal compiler error)
FAIL: gnat.dg/specs/constructor.ads (test for excess errors)
Excess errors:
xgcc: internal compiler error: Segmentation Fault signal terminated program
gnat1
I'm seeing for 64-bit sparc only, but a similar failure occurs on IA-64, too,
which may or may not be related.
On SPARC, I have
$ gnat1 -quiet
-fRTS=/var/gcc/regression/trunk/11.4-gcc/build/sparc-sun-solaris2.11/sparcv9/libada
-m64 -mptr64 -mstack-bias -mno-v8plus -mcpu=v9
/vol/gcc/src/hg/trunk/local/gcc/testsuite/gnat.dg/specs/constructor.ads -o
constructor.s
Thread 2 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1 (LWP 1)]
wi::divmod_internal (quotient=0x0, remainder_len=0x0, remainder=0x0,
dividend_val=0x0, dividend_len=0, dividend_prec=0,
divisor_val=<unavailable>, divisor_len=<unavailable>,
divisor_prec=<unavailable>, sgn=<unavailable>, oflow=<unavailable>)
at /vol/gcc/src/hg/trunk/local/gcc/wide-int.cc:1728
1728 dividend_prec);
There is no further stacktrace.
1: x/i $pc
=> 0x12289fc <wi::divmod_internal(long long*, unsigned int*, long long*, long
long const*, unsigned int, unsigned int, long long const*, unsigned int,
unsigned int, signop, bool*)+80>: st %g3, [ %fp + -436 ]
(gdb) p/x $g3
$1 = 0x4
(gdb) p/x $fp
$2 = 0x0
Rainer
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Subject: [Bug ada/82126] [8 regression] gnat.dg/alignment3.adb FAILs
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--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Sep 7 09:27:31 2017
New Revision: 251834
URL: https://gcc.gnu.org/viewcvs?rev=251834&root=gcc&view=rev
Log:
PR ada/82126
* gnat.dg/alignment3.adb: Add pragma No_Component_Reordering.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gnat.dg/alignment3.adb
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Subject: [Bug ada/82126] [8 regression] gnat.dg/alignment3.adb FAILs
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
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Subject: [Bug ada/82127] [8 regression] gnat.dg/specs/constructor.ads FAILs
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Rainer Orth <ro at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Subject: [Bug ada/82127] [8 regression] gnat.dg/specs/constructor.ads FAILs
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--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
This is the failure on ia64:
Program received signal SIGSEGV, Segmentation fault.
wi::fits_to_tree_p<generic_wide_int<wide_int_ref_storage<false> > > (
x=<error reading variable: Cannot access memory at address
0x6008000004000298>,
type=<error reading variable: Cannot access memory at address
0x60080000040002a0>) at ../../gcc/tree.h:5263
5263 wi::fits_to_tree_p (const T &x, const_tree type)
(gdb) bt
#0 wi::fits_to_tree_p<generic_wide_int<wide_int_ref_storage<false> > > (
x=<error reading variable: Cannot access memory at address
0x6008000004000298>,
type=<error reading variable: Cannot access memory at address
0x60080000040002a0>) at ../../gcc/tree.h:5263
#1 0x4000000002133190 in force_fit_type (
type=<error reading variable: Cannot access memory at address
0x6008000004000248>,
cst=<error reading variable: Cannot access memory at address
0x6008000004000250>,
overflowable=<error reading variable: Cannot access memory at address
0x6008000004000258>,
overflowed=<error reading variable: Cannot access memory at address
0x6008000004000260>) at ../../gcc/tree.c:1348
(gdb) x/i $pc
=> 0x40000000021419c0
<wi::fits_to_tree_p<generic_wide_int<wide_int_ref_storage<false> >
>(generic_wide_int<wide_int_ref_storage<false> > const&, tree_node const*)>:
[MMI] alloc r39=ar.pfs,15,10,0
That looks like a stack overflow.
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Subject: [Bug tree-optimization/82128] New: [8 Regression] ICE on valid code
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Bug ID: 82128
Summary: [8 Regression] ICE on valid code
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Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
After Richi's commit r251650 we ICE on:
$ g++ /home/marxin/Programming/gcc/gcc/testsuite/g++.dg/torture/pr65626.C -O3
-fno-tree-forwprop
during GIMPLE pass: fre
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/torture/pr65626.C: In member
function ‘void B::m_fn3(const A&, const int&, const C&, int&) const’:
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/torture/pr65626.C:19:1:
internal compiler error: in VN_INFO, at tree-ssa-sccvn.c:387
}
^
0xf6f52b VN_INFO(tree_node*)
../../gcc/tree-ssa-sccvn.c:387
0xf47c35 eliminate_avail
../../gcc/tree-ssa-pre.c:4104
0xf4a0b7 eliminate_dom_walker::before_dom_children(basic_block_def*)
../../gcc/tree-ssa-pre.c:4604
0x14e0c7a dom_walker::walk(basic_block_def*)
../../gcc/domwalk.c:291
0xf4923b eliminate
../../gcc/tree-ssa-pre.c:4831
0xf4930e execute
../../gcc/tree-ssa-pre.c:5277
>From gcc-bugs-return-574504-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 09:58:03 2017
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Subject: [Bug tree-optimization/82128] [8 Regression] ICE on valid code
Date: Thu, 07 Sep 2017 09:58:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
Target Milestone|--- |8.0
>From gcc-bugs-return-574505-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 10:00:37 2017
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Subject: [Bug c++/82067] G++ has an internal compiler error in possible_polymorphic_call_targets, at ipa-devirt.c:1557
Date: Thu, 07 Sep 2017 10:00:00 -0000
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--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Sorry I meant --verbose (not --save-temps) :)
>From gcc-bugs-return-574506-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 10:13:32 2017
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Subject: [Bug c++/69953] [5/6 Regression] Using lto causes gtkmm/gparted and gtkmm/inkscape compile to fail
Date: Thu, 07 Sep 2017 10:13:00 -0000
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--- Comment #38 from Martin Liška <marxin at gcc dot gnu.org> ---
So downloading the package and testing that with problematic 6.3 does not
reproduce. Can you please verify you have really GCC 6.4? If so, would it be
possible to create a virtual machine or a Docker image which I can replay and
thus reproduce?
>From gcc-bugs-return-574507-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 10:14:20 2017
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Subject: [Bug middle-end/81318] [8 regression] ICE in to_reg_br_prob_base, at profile-count.h:189
Date: Thu, 07 Sep 2017 10:14:00 -0000
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--- Comment #26 from Martin Liška <marxin at gcc dot gnu.org> ---
Sorry for the inconvenience, I'll work on that with Honza right after Cauldron
this weekend.
>From gcc-bugs-return-574508-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 10:32:24 2017
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Subject: [Bug tree-optimization/82129] New: [8 Regression] ICE in compute_antic, at tree-ssa-pre.c:2447
Date: Thu, 07 Sep 2017 10:32:00 -0000
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Bug ID: 82129
Summary: [8 Regression] ICE in compute_antic, at
tree-ssa-pre.c:2447
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
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gcc-8.0.0-alpha20170903 snapshot (r251628) ICEs when compiling the following
snippet w/ -O2, -O3, or -Ofast:
int pj;
void
g4 (unsigned long int *bc, unsigned long int *h5)
{
if (pj != 0)
{
int ib = 0;
while (bc != 0)
{
m6:
for (pj = 0; pj < 2; ++pj)
pj = 0;
while (pj != 0)
{
for (;;)
{
}
while (ib != 0)
{
unsigned long int tv = *bc;
unsigned long int n7;
*bc = 1;
while (*bc != 0)
{
}
ut:
if (pj == 0)
n7 = *h5 > 0;
else
{
*h5 = tv;
n7 = *h5;
}
ib += n7;
}
}
}
goto ut;
}
goto m6;
}
% gcc-8.0.0-alpha20170903 -O2 -c vbgefb2z.c
during GIMPLE pass: pre
vbgefb2z.c: In function 'g4':
vbgefb2z.c:4:1: internal compiler error: in compute_antic, at
tree-ssa-pre.c:2447
g4 (unsigned long int *bc, unsigned long int *h5)
^~
>From gcc-bugs-return-574510-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 10:52:18 2017
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Subject: [Bug ada/82127] [8 regression] gnat.dg/specs/constructor.ads FAILs
Date: Thu, 07 Sep 2017 10:52:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |ebotcazou at gcc dot gnu.org
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixing.
>From gcc-bugs-return-574509-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 10:52:02 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ada/82127] [8 regression] gnat.dg/specs/constructor.ads FAILs
Date: Thu, 07 Sep 2017 10:52:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-07
CC| |ebotcazou at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Yes, an infinite recursion.
>From gcc-bugs-return-574511-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 10:59:53 2017
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/82130] New: stringification (#) in traditional mode
Date: Thu, 07 Sep 2017 10:59:00 -0000
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Bug ID: 82130
Summary: stringification (#) in traditional mode
Product: gcc
Version: 7.1.0
Status: UNCONFIRMED
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Priority: P3
Component: preprocessor
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I noticed that cpp does not seem to support stringification in traditional
mode.
Simple Fortran test:
#define _ASSERT_(expr) if (.not. (expr)) print *, #expr
program test
logical :: check = .false.
_ASSERT_(check)
end
cpp in standard mode does the expected thing, namely translate the _ASSERT_
line into:
if (.not. (check)) print *, "check"
(which is valid Fortran code). But with -traditional I get:
if (.not. (check)) print *, #check
That's a shame because it makes stringification unusable with gfortran. Is is
feasible to add support for stringification in traditional mode?
>From gcc-bugs-return-574512-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 11:14:53 2017
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Subject: [Bug tree-optimization/82129] [8 Regression] ICE in compute_antic, at tree-ssa-pre.c:2447
Date: Thu, 07 Sep 2017 11:14:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82129
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-07
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Target Milestone|--- |8.0
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r249063.
>From gcc-bugs-return-574513-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 11:15:39 2017
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Subject: [Bug tree-optimization/82129] [8 Regression] ICE in compute_antic, at tree-ssa-pre.c:2447
Date: Thu, 07 Sep 2017 11:15:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hum...
>From gcc-bugs-return-574514-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 11:16:19 2017
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Subject: [Bug tree-optimization/82128] [8 Regression] ICE on valid code
Date: Thu, 07 Sep 2017 11:16:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine then.
>From gcc-bugs-return-574515-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 11:21:20 2017
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Subject: [Bug target/81979] [8 Regression] Assembler messages: Error: can't resolve `.got2' {.got2 section} - `.LCF0' {.text.unlikely section}
Date: Thu, 07 Sep 2017 11:21:00 -0000
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Sep 7 11:20:40 2017
New Revision: 251843
URL: https://gcc.gnu.org/viewcvs?rev=251843&root=gcc&view=rev
Log:
PR target/81979
* output.h (switch_to_other_text_partition): New declaration.
* varasm.c (switch_to_other_text_partition): New function.
* config/rs6000/rs6000.c (uses_TOC): Return 2 if
NOTE_INSN_SWITCH_TEXT_SECTIONS is seen before finding load_toc_* insn.
(rs6000_elf_declare_function_name): If uses_TOC returned 2, switch
to the other text partition before emitting LCL label and switch back
after emitting the word after it.
* gcc.dg/pr81979.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr81979.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/rs6000/rs6000.c
trunk/gcc/output.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/varasm.c
>From gcc-bugs-return-574516-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 11:24:37 2017
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Subject: [Bug c++/82125] Suboptimal error message for range-based for
Date: Thu, 07 Sep 2017 11:24:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, we should have a custom diagnostic for range-based 'for' that fails to
compile.
>From gcc-bugs-return-574517-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 11:34:50 2017
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Subject: [Bug middle-end/82123] [7/8 regression] spurious -Wformat-overflow warning for converted vars
Date: Thu, 07 Sep 2017 11:34:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |aldyh at gcc dot gnu.org,
| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This is the typical case of value range info being more precise during vrp pass
(where we have ASSERT_EXPRs) rather than elsewhere (where we don't have them
and pin_3 here is set before the condition). Supposedly the planed on demand
value range stuff could help there, but I have no idea for ETA on that.
>From gcc-bugs-return-574518-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 11:36:12 2017
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Subject: [Bug target/81833] [7/8 Regression] PowerPC: VSX: Miscompiles ffmpeg's scalarproduct_int16_vsx at -O1
Date: Thu, 07 Sep 2017 11:36:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So fixed on the trunk so far? Any plans for 7.x backport?
>From gcc-bugs-return-574519-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 11:44:53 2017
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Subject: [Bug target/81979] [8 Regression] Assembler messages: Error: can't resolve `.got2' {.got2 section} - `.LCF0' {.text.unlikely section}
Date: Thu, 07 Sep 2017 11:44:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-574520-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 11:52:25 2017
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Subject: [Bug target/81979] [8 Regression] Assembler messages: Error: can't resolve `.got2' {.got2 section} - `.LCF0' {.text.unlikely section}
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Arseny Solokha <asolokha at gmx dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |andrewjenner at gcc dot gnu.org,
| |charlet at gcc dot gnu.org
--- Comment #6 from Arseny Solokha <asolokha at gmx dot com> ---
Should I file a new PR asking to port the fix to powerpcspe, then?
>From gcc-bugs-return-574521-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 11:53:58 2017
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Subject: [Bug target/80846] auto-vectorized AVX2 horizontal sum should narrow to 128b right away, to be more efficient for Ryzen and Intel
Date: Thu, 07 Sep 2017 11:53:00 -0000
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--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #11)
> that's not using the unpacking strategy (sum adjacent elements) but still the
> vector shift approach (add upper/lower halves). That's sth that can be
> changed independently.
>
> Waiting for final vec_extract/init2 optab settling.
That should be settled now.
BTW, for reductions in PR80324 I've added for avx512fintrin.h __MM512_REDUCE_OP
which for reductions from 512-bit vectors uses smaller and smaller vectors,
perhaps that is something we should use for the reductions emitted by the
vectorizer too (perhaps through a target hook that would emit gimple for the
reduction)?
>From gcc-bugs-return-574522-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 11:55:26 2017
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Subject: [Bug target/81979] [8 Regression] Assembler messages: Error: can't resolve `.got2' {.got2 section} - `.LCF0' {.text.unlikely section}
Date: Thu, 07 Sep 2017 11:55:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yes. While powerpc{,64}* is primary target and regressions there are relevant
for releases, powerpcspe* is not.
>From gcc-bugs-return-574523-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 12:23:46 2017
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Subject: [Bug go/81970] carchive gotools tests fail
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Uroš Bizjak <ubizjak at gmail dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Fixed by [1].
[1] https://gcc.gnu.org/ml/gcc-patches/2017-08/msg01747.html
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Subject: [Bug middle-end/81698] expand_case uses wrong edge as default edge
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-574525-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 12:33:31 2017
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Subject: [Bug go/82131] New: FAIL: TestCgoCallbackGC in gotools testsuite; segfaults in morestack.S:529
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Bug ID: 82131
Summary: FAIL: TestCgoCallbackGC in gotools testsuite;
segfaults in morestack.S:529
Product: gcc
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Status: UNCONFIRMED
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The testcase fails on x86_64-linux-gnu split-stack target.
Running the testcase manually under the debugger:
$gdb --args ./testprogcgo CgoCallbackGC
(gdb) r
Starting program:
/home/uros/git/gcc/libgo/go/runtime/testdata/testprogcgo/testprogcgo
CgoCallbackGC
warning: no loadable sections found in added symbol-file system-supplied DSO at
0x2aaaaaaab000
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x2aaaad51d940 (LWP 1741)]
[New Thread 0x2aaaaf5c6940 (LWP 1742)]
[New Thread 0x2aaaaf9da940 (LWP 1744)]
[New Thread 0x2aaaaf7d0940 (LWP 1743)]
[New Thread 0x2aaac9a6b940 (LWP 1745)]
[New Thread 0x2aaac9c75940 (LWP 1746)]
...
[New Thread 0x2aab347a9940 (LWP 1944)]
[New Thread 0x2aab34c8b940 (LWP 1945)]
[New Thread 0x2aab34e97940 (LWP 1946)]
[New Thread 0x2aab354a6940 (LWP 1947)]
[New Thread 0x2aab356b0940 (LWP 1948)]
[New Thread 0x2aab37906940 (LWP 1949)]
[Thread 0x2aab0050e940 (LWP 1849) exited]
[Thread 0x2aaae5289940 (LWP 1784) exited]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x2aab01168940 (LWP 1851)]
__morestack () at ../../../git/gcc/libgcc/config/i386/morestack.S:529
529 call __morestack_unblock_signals
(gdb) bt
#0 __morestack () at ../../../git/gcc/libgcc/config/i386/morestack.S:529
#1 0x00002aaaaba3e73e in dwarf_lookup_pc (state=state@entry=0x2aaaad91f000,
ddata=ddata@entry=0x2aaaaf12fd10, pc=<optimized out>,
pc@entry=46912512497780, callback=callback@entry=0x2aaaab4e1aa0 <callback>,
error_callback=error_callback@entry=0x2aaaab4e1d20 <error_callback>,
data=data@entry=0x2aab42847740, found=<optimized out>) at
../../../git/gcc/libbacktrace/dwarf.c:2836
#2 0x00002aaaaba3fbbf in dwarf_fileline (state=0x2aaaad91f000,
pc=46912512497780, callback=0x2aaaab4e1aa0 <callback>,
error_callback=0x2aaaab4e1d20 <error_callback>, data=0x2aab42847740) at
../../../git/gcc/libbacktrace/dwarf.c:2896
#3 0x00002aaaaba40cc6 in unwind (context=<optimized out>,
vdata=0x2aab42847700) at ../../../git/gcc/libbacktrace/backtrace.c:91
#4 0x00002aaaac495499 in _Unwind_Backtrace (trace=trace@entry=0x2aaaaba40c40
<unwind>, trace_argument=trace_argument@entry=0x2aab42847700)
at ../../../git/gcc/libgcc/unwind.inc:295
#5 0x00002aaaaba40d39 in backtrace_full (state=0x2aaaad91f000,
skip=skip@entry=0, callback=callback@entry=0x2aaaab4e1aa0 <callback>,
error_callback=error_callback@entry=0x2aaaab4e1d20 <error_callback>,
data=data@entry=0x2aab42847740)
at ../../../git/gcc/libbacktrace/backtrace.c:127
#6 0x00002aaaab4e1dd5 in runtime_callers (skip=skip@entry=4, locbuf=<optimized
out>, m=<optimized out>, keep_thunks=keep_thunks@entry=false)
at ../../../git/gcc/libgo/runtime/go-callers.c:184
#7 0x00002aaaab940071 in runtime.callers (skip=skip@entry=4, locbuf=...) at
../../../git/gcc/libgo/go/runtime/traceback_gccgo.go:63
#8 0x00002aaaab96e4c4 in runtime.mProf_Malloc (size=16, p=<optimized out>) at
../../../git/gcc/libgo/go/runtime/mprof.go:245
#9 runtime.profilealloc (mp=0xc4203fc000, size=16, x=<optimized out>) at
../../../git/gcc/libgo/go/runtime/malloc.go:873
#10 runtime.mallocgc (size=<optimized out>, typ=<optimized out>,
needzero=<optimized out>) at ../../../git/gcc/libgo/go/runtime/malloc.go:795
#11 0x00002aaaaba49875 in __morestack () at
../../../git/gcc/libgcc/config/i386/morestack.S:544
#12 0x00002aaaab97014f in runtime.newobject (typ=<optimized out>) at
../../../git/gcc/libgo/go/runtime/malloc.go:850
#13 0x0000000000406fb6 in main.grow1 (x=0xc42010a8a0, sum=0xc4202e0ce8) at
/home/uros/git/gcc/libgo/go/runtime/testdata/testprogcgo/callback.go:66
#14 0x0000000000406fe1 in main.grow1 (x=0xc42010a8a0, sum=0xc4202e0ce0) at
/home/uros/git/gcc/libgo/go/runtime/testdata/testprogcgo/callback.go:67
#15 0x0000000000406fe1 in main.grow1 (x=0xc42010a8a0, sum=0xc4202e0cd8) at
/home/uros/git/gcc/libgo/go/runtime/testdata/testprogcgo/callback.go:67
...
#63 0x0000000000406fe1 in main.grow1 (x=0xc42010a8a0, sum=0xc4202e0b58) at
/home/uros/git/gcc/libgo/go/runtime/testdata/testprogcgo/callback.go:67
#64 0x0000000000406fe1 in main.grow1 (x=0xc42010a8a0, sum=0xc4202e0b50) at
/home/uros/git/gcc/libgo/go/runtime/testdata/testprogcgo/callback.go:67
#65 0x00002aaaaba3ca20 in ?? () at ../../../git/gcc/libbacktrace/dwarf.c:925
from /home/uros/local/lib64/libgo.so.11
#66 0x00002aab42846000 in ?? ()
(gdb) disass
...
0x00002aaaaba4982c <+42>: callq 0x2aaaaba48890 <__generic_morestack>
0x00002aaaaba49831 <+47>: mov -0x8(%rbp),%r10
0x00002aaaaba49835 <+51>: mov %rax,%rsp
0x00002aaaaba49838 <+54>: sub %r10,%rax
0x00002aaaaba4983b <+57>: add $0x600,%rax
0x00002aaaaba49841 <+63>: mov %rax,%fs:0x70
=> 0x00002aaaaba4984a <+72>: callq 0x2aaaaba48ea0
<__morestack_unblock_signals>
0x00002aaaaba4984f <+77>: mov -0x18(%rbp),%rdi
0x00002aaaaba49853 <+81>: mov -0x20(%rbp),%rsi
...
(gdb) list
524 #else
525 #define X86_64_SAVE_NEW_STACK_BOUNDARY(reg) movl
%e##reg,%fs:0x40
526 #endif
527 X86_64_SAVE_NEW_STACK_BOUNDARY (ax)
528
529 call __morestack_unblock_signals
530
531 movq -24(%rbp),%rdi # Restore registers.
532 movq -32(%rbp),%rsi
533 movq -40(%rbp),%rdx
>From gcc-bugs-return-574526-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 12:36:17 2017
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Subject: [Bug go/82131] FAIL: TestCgoCallbackGC in gotools testsuite; segfaults in morestack.S:529
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-linux-gnu,
| |powerpc64le-unknown-linux-g
| |nu
Version|unknown |8.0
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Also seen on powerpc64le-unknown-linux-gnu [1].
[1] https://gcc.gnu.org/ml/gcc-testresults/2017-09/msg00524.html
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Subject: [Bug libgomp/82124] FAIL: libgomp.c++/pr69393.C (test for excess errors)
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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> I think this is a dup, the testcase uses -flto.
>
> *** This bug has been marked as a duplicate of bug 82005 ***
Oh OK, I'm guessing a lot of the other new FAILs are probably also duplicates
then, so I won't open new bugs for all of them after all then.
>From gcc-bugs-return-574528-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 12:51:42 2017
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From: "wschmidt at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/81833] [7/8 Regression] PowerPC: VSX: Miscompiles ffmpeg's scalarproduct_int16_vsx at -O1
Date: Thu, 07 Sep 2017 12:51:00 -0000
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--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Yes, I have backports prepared for 5, 6, and 7. Waiting a short time before
applying those.
Thanks!
Bill
>From gcc-bugs-return-574529-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 13:13:17 2017
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Subject: [Bug target/82132] New: FAIL: gcc.dg/vect/vect-tail-nomask-1.c (test for excess errors) due to missing posix_memalign
Date: Thu, 07 Sep 2017 13:13:00 -0000
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Bug ID: 82132
Summary: FAIL: gcc.dg/vect/vect-tail-nomask-1.c (test for
excess errors) due to missing posix_memalign
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Host: i386-apple-darwin9.8.0
Target: i386-apple-darwin9.8.0
Build: i386-apple-darwin9.8.0
gcc.dg/vect/vect-tail-nomask-1.c FAILs with:
FAIL: gcc.dg/vect/vect-tail-nomask-1.c (test for excess errors)
Excess errors:
Undefined symbols:
"_posix_memalign", referenced from:
_run_test in ccH1tfXl.o
_run_test in ccH1tfXl.o
_run_test in ccH1tfXl.o
_posix_memalign$non_lazy_ptr in ccH1tfXl.o
ld: symbol(s) not found
WARNING: gcc.dg/vect/vect-tail-nomask-1.c compilation failed to produce
executable
This is because the posix_memalign function hadn't been added yet in Darwin 9.
Instead of looking for an external posix_memalign, the testcase should use
__builtin_posix_memalign. Related to the lack of documentation for the builtin
noted in bug 65244 comment 9.
>From gcc-bugs-return-574530-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 13:15:25 2017
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From: "nickpapior at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/82133] New: unroll-loops too aggressive
Date: Thu, 07 Sep 2017 13:15:00 -0000
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Bug ID: 82133
Summary: unroll-loops too aggressive
Product: gcc
Version: 7.0
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Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/opt/generic/gcc/7.2.0/libexec/gcc/x86_64-pc-linux-gnu/7.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure --prefix /opt/generic/gcc/7.2.0
--with-gmp=/opt/generic/gcc/7.2.0 --with-mpfr=/opt/generic/gcc/7.2.0
--with-mpc=/opt/generic/gcc/7.2.0 --with-isl=/opt/generic/gcc/7.2.0
--enable-lto --enable-threads --with-quad --with-multilib-list=m64
--enable-languages=c,c++,fortran,objc,obj-c++,go
Thread model: posix
gcc version 7.2.0 (GCC)
The following bug has been confirmed by other parts and runned using these
variants:
- SuSE tumbleweed with system GCC 7.1.1, Atom core
- Debian stretch with custom 7.1.0 and 7.2.0 builds (according to flags
above), Haswell core
- Another distribution (see martin-frbg user in below link).
As several 7.X versions are found; assigned 7.0.
When using unroll-loops to compile OpenBLAS (0.2.20 and developer) it produces
seg-faults when running the tests.
It happens at these minimum compilation options:
-O1 -funroll-loops -fipa-ra
As long as -funroll-loops isn't in the compilation flags everything works as
expected (even for much higher optimization levels: -O3
-fexpensive-optimizations -ftree-vectorize -fprefetch-loop-arrays
-march=native)
It only happens with compilation with optimization, so a backtrace is unusable
(I am not experienced enough to run gdb efficiently).
An invalid memory reference is triggered:
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.
I have filed a bug-report with OpenBLAS too and they indicate that it is
because GCC unrolls a loop one to many times.
For the discussion see here: https://github.com/xianyi/OpenBLAS/issues/1292
The bug can be reproduced by using this small script (in the OpenBLAS
directory):
###
#!/bin/bash
function run_all {
echo "CFLAGS = $CFLAGS"
echo "FCFLAGS = $FCFLAGS"
make clean > /dev/null
make COMMON_OPT="$CFLAGS" FCOMMON_OPT="$FCFLAGS" BINARY=64 SANITY_CHECK=1
MAX_STACK_ALLOC=2048 NUM_THREADS=48 USE_THREAD=0 libs netlib shared 2>
${1}_compilation.out > ${1}_compilation.out
make COMMON_OPT="$CFLAGS" FCOMMON_OPT="$FCFLAGS" BINARY=64 SANITY_CHECK=1
MAX_STACK_ALLOC=2048 NUM_THREADS=48 USE_THREAD=0 tests 2> $1.out > $1.out
}
which gcc
sleep 1
unset FCFLAGS
unset CFLAGS
export CFLAGS="-O1 -funroll-loops -fipa-ra"
export FCFLAGS="$CFLAGS"
run_all minimum
###
>From gcc-bugs-return-574531-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 13:20:41 2017
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Subject: [Bug c/82134] New: warn_unused_result triggers on empty structs even when they are used
Date: Thu, 07 Sep 2017 13:20:00 -0000
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Bug ID: 82134
Summary: warn_unused_result triggers on empty structs even when
they are used
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If a function that returns an empty struct is tagged with attribute
warn_unused_result, any call will trigger the warning, even if the return value
is (nominally) used. For instance
struct Empty {};
extern void use_empty(struct Empty);
__attribute__((warn_unused_result))
extern struct Empty make_empty(void);
void should_warn(void)
{
make_empty();
}
void shouldnt_warn_1(void)
{
use_empty(make_empty());
}
void shouldnt_warn_2(void)
{
struct Empty e = make_empty();
use_empty(e);
}
-->
test.c: In function ‘should_warn’:
test.c:10:5: warning: ignoring return value of ‘make_empty’, declared with
attribute warn_unused_result [-Wunused-result]
make_empty();
^~~~~~~~~~~~
test.c: In function ‘shouldnt_warn_1’:
test.c:15:5: warning: ignoring return value of ‘make_empty’, declared with
attribute warn_unused_result [-Wunused-result]
use_empty(make_empty());
^~~~~~~~~~~~~~~~~~~~~~~
test.c: In function ‘shouldnt_warn_2’:
test.c:20:22: warning: ignoring return value of ‘make_empty’, declared with
attribute warn_unused_result [-Wunused-result]
struct Empty e = make_empty();
^~~~~~~~~~~~
with both GCC 6 and GCC 7.
(From here:
https://stackoverflow.com/questions/46096628/gcc-empty-structs-and-wunused-result)
>From gcc-bugs-return-574532-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 14:21:22 2017
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Subject: [Bug testsuite/82120] FAIL: gcc.dg/tree-ssa/pr81588.c
Date: Thu, 07 Sep 2017 14:21:00 -0000
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--- Comment #7 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I think it returns 0 in the testcase (optimizing for speed).
I've noticed that arm_cortex_a5_branch_cost() has the same implementation as
arm_cortex_m7_branch_cost(), but according to Thomas, the behaviour is
different, since he sees the test pass for m7.
Is it possible to write a dynamic gcc query rather than hardcode cpu names in
logical_op_short_circuit ?
>From gcc-bugs-return-574533-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 14:25:44 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/82120] FAIL: gcc.dg/tree-ssa/pr81588.c
Date: Thu, 07 Sep 2017 14:25:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Christophe Lyon from comment #7)
> I think it returns 0 in the testcase (optimizing for speed).
>
> I've noticed that arm_cortex_a5_branch_cost() has the same implementation as
> arm_cortex_m7_branch_cost(), but according to Thomas, the behaviour is
> different, since he sees the test pass for m7.
>
> Is it possible to write a dynamic gcc query rather than hardcode cpu names
> in logical_op_short_circuit ?
As:
...
|| [istarget visium-*-*]
|| [check_effective_target_arm_cortex_m] } {
shows, you can do there anything you want. Ideally it should be cached.
>From gcc-bugs-return-574534-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 14:39:09 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80846] auto-vectorized AVX2 horizontal sum should narrow to 128b right away, to be more efficient for Ryzen and Intel
Date: Thu, 07 Sep 2017 14:39:00 -0000
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--- Comment #15 from rguenther at suse dot de <rguenther at suse dot de> ---
On September 7, 2017 1:53:47 PM GMT+02:00, "jakub at gcc dot gnu.org"
<gcc-bugzilla@gcc.gnu.org> wrote:
>https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80846
>
>--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
>(In reply to Richard Biener from comment #11)
>> that's not using the unpacking strategy (sum adjacent elements) but
>still the
>> vector shift approach (add upper/lower halves). That's sth that can
>be
>> changed independently.
>>
>> Waiting for final vec_extract/init2 optab settling.
>
>That should be settled now.
>
>BTW, for reductions in PR80324 I've added for avx512fintrin.h
>__MM512_REDUCE_OP
>which for reductions from 512-bit vectors uses smaller and smaller
>vectors,
>perhaps that is something we should use for the reductions emitted by
>the
>vectorizer too (perhaps through a target hook that would emit gimple
>for the
>reduction)?
Yeah, I have a patch that does this. The question is how to query the target if
the vector sizes share the same register set. Like we wouldn't want to go to
mmx register size.
Doing this would also allow to execute the adds for 512 to 128 bit reduction in
parallel.
>From gcc-bugs-return-574535-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 14:40:06 2017
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Subject: [Bug testsuite/82120] FAIL: gcc.dg/tree-ssa/pr81588.c
Date: Thu, 07 Sep 2017 14:40:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82120
--- Comment #9 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Sure, I'm just reluctant to add yet another
check_effective_target_arm_cortex_a5 function in the already extremely long
list of arm-dedicated queries.
Maybe I can play with arm's -mprint-tune-info, which dumps tuning parameters in
the .s file:
for cortex-m7:
@logical_op_non_short_circuit: [1,1]
for cortex-a9:
@logical_op_non_short_circuit: [1,1]
for cortex-a5:
@logical_op_non_short_circuit: [0,0]
and use that to write a check_effective_target_arm_short_circuit ?
>From gcc-bugs-return-574536-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 14:44:11 2017
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Subject: [Bug testsuite/82120] FAIL: gcc.dg/tree-ssa/pr81588.c
Date: Thu, 07 Sep 2017 14:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82120
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The best would be to add -mbranch-cost= support like many other targets have,
and have an effective target with the list of targets that do support it,
adjust all such testcases to use that.
>From gcc-bugs-return-574537-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 14:58:13 2017
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Subject: [Bug ipa/82107] [5/6/7/8 Regression] O2 optimisation on amd64 leads to error
Date: Thu, 07 Sep 2017 14:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82107
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Huh, very nice example I must admit.
Following bad happens:
In FooImpl.cpp content of real_payload is inlined to payload function. Then ICF
does merge operation:
FooImpl::real_payload (struct FooImpl * const this, struct wstring & result1,
struct wstring & result2)
{
<bb 2> [100.00%] [count: INV]:
FooBase<FooImpl>::payload (this_2(D), result1_3(D), result2_4(D)); [tail
call]
return;
}
On the other hand in main.cpp a tail call is generated from original source
code:
FooBase<FooImpl>::payload (struct FooBase * const this, struct wstring &
result1, struct wstring & result2)
{
<bb 2> [100.00%] [count: INV]:
FooImpl::real_payload (this_2(D), result1_3(D), result2_4(D)); [tail call]
return;
}
And as both are COMDATs wrong combination of function is selected and one can
see the infinite loop:
0x400b80
<_ZN7FooImpl12real_payloadERNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEEES6_>
jmpq 0x400a30
<_ZN7FooBaseI7FooImplE7payloadERNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEEES8_>
0x400a30
<_ZN7FooBaseI7FooImplE7payloadERNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEEES8_>
jmpq 0x400b80
<_ZN7FooImpl12real_payloadERNSt7__cxx1112basic_stringIwSt11char_traitsIwESaIwEEES6_>_>
Well, we would need to somehow preserve the original order, probably based on
inlining decisions that were done.
Let me discuss that with Honza.
>From gcc-bugs-return-574538-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:06:30 2017
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Subject: [Bug c/82134] warn_unused_result triggers on empty structs even when they are used
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I fail to see the usefulness of warn_unused_result attribute on functions that
return such types, what kind of problem is calling those without assigning that
to a var? There are no data copied...
>From implementation POV, the problem is that the empty structure copies are
discarded during gimplification (in different spots, for C++ they are discarded
through cp-gimplify.c (cp_gimplify_expr) doing:
else if (simple_empty_class_p (TREE_TYPE (op0), op1))
{
/* Remove any copies of empty classes. Also drop volatile
variables on the RHS to avoid infinite recursion from
gimplify_expr trying to load the value. */
if (TREE_SIDE_EFFECTS (op1))
{
if (TREE_THIS_VOLATILE (op1)
&& (REFERENCE_CLASS_P (op1) || DECL_P (op1)))
op1 = build_fold_addr_expr (op1);
gimplify_and_add (op1, pre_p);
}
gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p,
is_gimple_lvalue, fb_lvalue);
*expr_p = TREE_OPERAND (*expr_p, 0);
}
while for C, it is done through gimplify.c (gimplify_modify_expr) doing:
/* For zero sized types only gimplify the left hand side and right hand
side as statements and throw away the assignment. Do this after
gimplify_modify_expr_rhs so we handle TARGET_EXPRs of addressable
types properly. */
if (zero_sized_type (TREE_TYPE (*from_p)) && !want_value)
{
gimplify_stmt (from_p, pre_p);
gimplify_stmt (to_p, pre_p);
*expr_p = NULL_TREE;
return GS_ALL_DONE;
}
and after that there is no way to differentiate if the call had a lhs or not.
Perhaps we could add a langhook and for zero_sized_type or if the langhook is
true (would use simple_empty_class_p for C++, otherwise false) just ignore the
warn_unused_result attribute or something similar; that would mean we wouldn't
warn in should_warn at least for C though (for C++ we would, because we turn it
into a TARGET_EXPR and warn as we voidify the call).
>From gcc-bugs-return-574539-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:26:10 2017
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Subject: [Bug c++/70029] [8 Regression] ICE with C++11 and -flto
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--- Comment #14 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to Jason Merrill from comment #13)
> I believe r241831 fixed the actual problem that verify_type was catching.
> This still fails because free_lang_data_in_type clears TYPE_LANG_FLAG_4 on
> 't' but not 'ct'.
No, that's not it.
The issue is still that build_ref_qualified_type creates a variant, and
build_type_attribute_qual_variant doesn't know how to recreate that, so it
returns a type that is its own main variant. We'll run into the same issue
with exception specifications. So it seems we need a langhook somewhere in
BTAQV or build_distinct_type_copy, to reproduce the language qualifiers and
variant relationship.
>From gcc-bugs-return-574540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:34:09 2017
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Subject: [Bug ada/82127] [8 regression] gnat.dg/specs/constructor.ads FAILs
Date: Thu, 07 Sep 2017 15:34:00 -0000
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--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Sep 7 15:33:29 2017
New Revision: 251846
URL: https://gcc.gnu.org/viewcvs?rev=251846&root=gcc&view=rev
Log:
PR ada/82127
* gcc-interface/decl.c (copy_and_substitute_in_layout): Put the fields
in order of increasing position in more cases.
Modified:
trunk/gcc/ada/ChangeLog
trunk/gcc/ada/gcc-interface/decl.c
>From gcc-bugs-return-574542-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:35:41 2017
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Subject: [Bug ada/82127] [8 regression] gnat.dg/specs/constructor.ads FAILs
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
>From gcc-bugs-return-574541-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:35:02 2017
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Subject: [Bug target/80846] auto-vectorized AVX2 horizontal sum should narrow to 128b right away, to be more efficient for Ryzen and Intel
Date: Thu, 07 Sep 2017 15:35:00 -0000
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--- Comment #16 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #15)
> Yeah, I have a patch that does this. The question is how to query the target
> if the vector sizes share the same register set. Like we wouldn't want to go
> to mmx register size.
>
> Doing this would also allow to execute the adds for 512 to 128 bit reduction
> in parallel.
I wonder if we just shouldn't have a target hook that does all that (emits the
best reduction sequence given original vector mode and operation), which could
return NULL/false or something to be expanded by the generic code. The
middle-end doesn't have information about costs of the various permutations,
preferences of vector types etc.
>From gcc-bugs-return-574543-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:37:20 2017
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Subject: [Bug libstdc++/70548] gdb pretty printers hang and spin cpu in gdb session.
Date: Thu, 07 Sep 2017 15:37:00 -0000
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--- Comment #2 from stu mark <smark at datto dot com> ---
this finally got so annoying I did something about it.
This is not the correct fix, but it seems to keep gdb from hanging and as all I
really want to do in life is debug my program, I don't care if it's not
perfect, I just care that I can continue to debug.
in varobj.c
line 778 or so (this is gdb 7.12.1 I'm playing with here)
/* We ask for one extra child, so that MI can report whether there
are more children. */
for (; to < 0 || i < to + 1; ++i)
{
if ( i > 100 ) // stu fix for hanging when to = -1
break;
varobj_item *item;
"to" is -1 and that makes this loop spin forever
so I added the stop at 100 figuring 100 whatevers is enough for me.
>From gcc-bugs-return-574544-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:43:27 2017
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Subject: [Bug middle-end/82083] sanitizer detects signed integer overflow in tree-data-ref.c with -O3
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Martin Liška <marxin at gcc dot gnu.org> changed:
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--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Good, then let's leave it..
>From gcc-bugs-return-574545-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:45:39 2017
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Subject: [Bug c/82134] warn_unused_result triggers on empty structs even when they are used
Date: Thu, 07 Sep 2017 15:45:00 -0000
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--- Comment #2 from Zack Weinberg <zackw at panix dot com> ---
The claim in the Stack Overflow post was that this was useful in a scenario
involving machine-generated code that couldn't return void for some external
reason, but they didn't go into any kind of detail.
It has always been my opinion that warnings in general should be made
optimization-independent, including early dead code optimizations like this,
with _possible_ carefully-defined-and-documented exceptions for `if (0) { /*
don't warn about stuff in here */ }` and similar. But I realize that's a long
way from where GCC is or has ever been.
>From gcc-bugs-return-574546-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:46:01 2017
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Subject: [Bug libstdc++/70548] gdb pretty printers hang and spin cpu in gdb session.
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
We can't try to fix the pretty printers without knowing which printer is being
used, and on what code.
See https://gcc.gnu.org/bugs/
>From gcc-bugs-return-574547-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:50:29 2017
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Subject: [Bug boehm-gc/64042] FAIL: boehm-gc.c/gctest.c -O2 execution test
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--- Comment #16 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Tom de Vries from comment #13)
> (In reply to Eric Gallager from comment #12)
> > (In reply to Tom de Vries from comment #11)
> > > Reported upstream here:
> > > https://lists.opendylan.org/pipermail/bdwgc/2015-January/006071.html
> >
> > This link doesn't work for me; is there a better upstream bug link URL?
>
> The archive seems to be down, and also gmane doesn't seem to work. I'll post
> the thread here.
OK, since there's no working link to an upstream bug report, I can't close this
as MOVED... gcc trunk no longer carries its own copy of the boehm-gc sources,
but since this bug is for the 5 branch, I'll wait until that branch is closed
to close this bug as WONTFIX.
>From gcc-bugs-return-574548-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:52:06 2017
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Subject: [Bug libstdc++/70548] gdb pretty printers hang and spin cpu in gdb session.
Date: Thu, 07 Sep 2017 15:52:00 -0000
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--- Comment #4 from stu mark <smark at datto dot com> ---
I left that more for Henrique Andrade.
If there's a problem with the pretty printer, and a lousy hack like this can
keep gdb from hanging, to me, it's worth it.
I don't know which pretty printer was having the problem, and it happens
randomly in various bits of code, and not consistently, so I can't really tell
which printer is hanging. If you have suggestions on how to figure that out,
I'll give it a go.
>From gcc-bugs-return-574549-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:52:08 2017
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Subject: [Bug boehm-gc/57761] USE_PROC_FOR_LIBRARIES does not work correctly
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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--- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> ---
gcc no longer carries its own copy of the boehm-gc sources; please send your
patch to the upstream boehm-gc project instead.
>From gcc-bugs-return-574550-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:53:32 2017
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Subject: [Bug c/82134] warn_unused_result triggers on empty structs even when they are used
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Marek Polacek <mpolacek at gcc dot gnu.org> changed:
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--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The problem with `if (0) { /* don't warn about stuff in here */ }` is that you
can jump into that block from elsewhere:
if (0)
{
L:
// ...
}
so it's not as easy as it might seem.
>From gcc-bugs-return-574551-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 15:53:49 2017
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/80897] [8 regression] gnat bootstrap broken on SPARC64/Linux
Date: Thu, 07 Sep 2017 15:53:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80897
--- Comment #10 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Thu Sep 7 15:53:09 2017
New Revision: 251847
URL: https://gcc.gnu.org/viewcvs?rev=251847&root=gcc&view=rev
Log:
PR target/80897
* config/sparc/sparc.c (sparc_emit_set_symbolic_const64): Deal with too
large offsets.
Added:
trunk/gcc/testsuite/gnat.dg/opt67.adb
trunk/gcc/testsuite/gnat.dg/opt67_pkg.adb
trunk/gcc/testsuite/gnat.dg/opt67_pkg.ads
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sparc/sparc.c
trunk/gcc/testsuite/ChangeLog
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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/80897] [8 regression] gnat bootstrap broken on SPARC64/Linux
Date: Thu, 07 Sep 2017 15:54:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #11 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Thanks for reporting the problem.
>From gcc-bugs-return-574553-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 16:09:37 2017
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From: "egallager at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug objc++/57607] g++ cannot distinguish obj-c message call from c++11 lambda
Date: Thu, 07 Sep 2017 16:09:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #4)
> The testcase breaks again with gcc8 though, this time causing an ICE:
>
> $ /usr/local/bin/g++ -std=c++11 -framework CoreFoundation -lobjc test57607.mm
> In file included from /usr/local/include/c++/8.0.0/bits/ios_base.h:46:0,
> from /usr/local/include/c++/8.0.0/ios:42,
> from /usr/local/include/c++/8.0.0/ostream:38,
> from /usr/local/include/c++/8.0.0/iostream:39,
> from test57607.mm:2:
> /usr/local/include/c++/8.0.0/system_error:191:23: internal compiler error:
> Segmentation fault
> explicit operator bool() const noexcept
> ^~~~
> libbacktrace could not find executable to open
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <https://gcc.gnu.org/bugs/> for instructions.
>
>
> Attaching gdb gives the following backtrace:
>
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_INVALID_ADDRESS at address: 0x3a138e4c
> 0x0010d744 in make_conv_op_name ()
> (gdb) bt
> #0 0x0010d744 in make_conv_op_name ()
> #1 0x00169ac7 in cp_parser_unqualified_id ()
> #2 0x00169e49 in cp_parser_id_expression ()
> #3 0x00169fb3 in cp_parser_parse_and_diagnose_invalid_type_name ()
> #4 0x0015e084 in cp_parser_member_declaration ()
> #5 0x0015ea24 in cp_parser_type_specifier ()
> #6 0x0016f480 in cp_parser_decl_specifier_seq ()
> #7 0x00174ab5 in cp_parser_simple_declaration ()
> #8 0x00175bdf in cp_parser_block_declaration ()
> #9 0x0017addc in cp_parser_declaration ()
> #10 0x0017b21e in cp_parser_declaration_seq_opt ()
> #11 0x0017b965 in cp_parser_namespace_definition ()
> #12 0x0017aeb9 in cp_parser_declaration ()
> #13 0x0017b21e in cp_parser_declaration_seq_opt ()
> #14 0x0017b576 in c_parse_file ()
> #15 0x00280a78 in c_common_parse_file ()
> #16 0x00bee0e5 in compile_file ()
> #17 0x01b02420 in toplev::main ()
> #18 0x01b03a34 in main ()
>
> I'll have to rebuild my gcc with debug info to get a better backtrace. It
> might be an entirely different issue that's just triggered by the same
> testcase, though, so I'm leaving this bug as UNCONFIRMED for now.
This ICE seems to have disappeared on me; file compiles successfully for me
now, but the resulting executable crashes when run:
$ /usr/local/bin/g++ -std=gnu++11 -framework CoreFoundation -lobjc -g -Wall
-Wextra -pedantic -o 57607.exe test57607.mm
$ ./57607.exe && echo $?
Hello world!
Bus error
$
gdb shows the error comes from objc_msgSend:
.+.... done
Hello world!
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000000
0x940e968c in objc_msgSend ()
(gdb) bt
#0 0x940e968c in objc_msgSend ()
#1 0x00001e81 in main () at test57607.mm:10
#2 0x00001dde in start ()
(gdb) quit
The program is running. Exit anyway? (y or n) y
objc_msgSend comes from the system libobjc, so this is an issue with Apple's
system libraries for my (outdated) OS version, not gcc. So since this is no
longer gcc's issue and the original ICE is fixed, I can close this as FIXED.
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Subject: [Bug bootstrap/59447] --with-dwarf2 is not propagated correctly, will always create dwarf4 by default
Date: Thu, 07 Sep 2017 16:13:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-07
Ever confirmed|0 |1
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to joseph@codesourcery.com from comment #1)
> This is a documentation bug - the installation manual should make clear
> that "DWARF 2" in the description of this option means DWARF 2 or later,
> as appropriate for the target, as opposed to (for example) STABS.
Confirmed, the documentation for --with-dwarf2 is still just:
--with-dwarf2
Specify that the compiler should use DWARF 2 debugging information as the
default.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug objc++/61759] [ICE] [objc] reaching gcc_unreachable in objc_eh_runtime_type at objc/objc-next-runtime-abi-01.c
Date: Thu, 07 Sep 2017 16:23:00 -0000
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Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|powerpc-unknown-darwin |*-*-darwin
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-07
Host|powerpc-unknown-darwin |*-*-darwin
Ever confirmed|0 |1
Known to fail| |8.0
Build|powerpc-unknown-darwin |*-*-darwin
--- Comment #8 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #7)
> (In reply to Douglas Mencken from comment #6)
> > Looks like I found the root of the issue ~
> > GCC ICEs when it meets C++ exception handling (try+catch)
> >
> > $ cat main.mm
> > #include <Foundation/Foundation.h>
> > #include <iostream>
> >
> > int main (void)
> > {
> > try {
> > throw 0;
> > } catch (int & e) {
> > std::cout << "caught" << std::endl;
> > }
> >
> > NSString *name = @"GNUstep !";
> > NSAutoreleasePool *pool;
> > pool = [NSAutoreleasePool new];
> > [pool drain];
> > }
> >
> > $ g++ main.mm -o test.out -framework Foundation -lobjc
> > main.mm: In function 'int main()':
> > main.mm:4:5: internal compiler error: in objc_eh_runtime_type, at
> > objc/objc-next-runtime-abi-01.c:2804
> > int main (void)
> > ^
> > libbacktrace could not find executable to open
> > Please submit a full bug report,
>
> This is similar to bug 35756 but since you have a different testcase I'll
> leave this open as a separate bug. Anyways, I think I have bad headers on my
> system, because my compiler chokes in that part:
>
> $ /usr/local/bin/g++ 61759_main.mm -o test.out -framework Foundation -lobjc
> In file included from
> /System/Library/Frameworks/Security.framework/Headers/Security.h:57:0,
> from
> /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.
> framework/Headers/LSSharedFileList.h:32,
> from
> /System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.
> framework/Headers/LaunchServices.h:37,
> from
> /System/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:41,
> from
> /System/Library/Frameworks/ApplicationServices.framework/Headers/
> ApplicationServices.h:20,
> from
> /System/Library/Frameworks/Foundation.framework/Headers/
> NSAppleEventDescriptor.h:8,
> from
> /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:107,
> from 61759_main.mm:1:
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:102:46:
> error: shift expression ‘(1853123693 << 8)’ overflows [-fpermissive]
> kSecAuthenticationTypeNTLM = AUTH_TYPE_FIX_ ('ntlm'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:102:46:
> error: enumerator value for ‘kSecAuthenticationTypeNTLM’ is not an integer
> constant
> kSecAuthenticationTypeNTLM = AUTH_TYPE_FIX_ ('ntlm'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:103:46:
> error: shift expression ‘(1836281441 << 8)’ overflows [-fpermissive]
> kSecAuthenticationTypeMSN = AUTH_TYPE_FIX_ ('msna'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:103:46:
> error: enumerator value for ‘kSecAuthenticationTypeMSN’ is not an integer
> constant
> kSecAuthenticationTypeMSN = AUTH_TYPE_FIX_ ('msna'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:104:46:
> error: shift expression ‘(1685086561 << 8)’ overflows [-fpermissive]
> kSecAuthenticationTypeDPA = AUTH_TYPE_FIX_ ('dpaa'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:104:46:
> error: enumerator value for ‘kSecAuthenticationTypeDPA’ is not an integer
> constant
> kSecAuthenticationTypeDPA = AUTH_TYPE_FIX_ ('dpaa'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:105:46:
> error: shift expression ‘(1919967585 << 8)’ overflows [-fpermissive]
> kSecAuthenticationTypeRPA = AUTH_TYPE_FIX_ ('rpaa'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:105:46:
> error: enumerator value for ‘kSecAuthenticationTypeRPA’ is not an integer
> constant
> kSecAuthenticationTypeRPA = AUTH_TYPE_FIX_ ('rpaa'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:106:46:
> error: shift expression ‘(1752462448 << 8)’ overflows [-fpermissive]
> kSecAuthenticationTypeHTTPBasic = AUTH_TYPE_FIX_ ('http'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:106:46:
> error: enumerator value for ‘kSecAuthenticationTypeHTTPBasic’ is not an
> integer constant
> kSecAuthenticationTypeHTTPBasic = AUTH_TYPE_FIX_ ('http'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:107:46:
> error: shift expression ‘(1752462436 << 8)’ overflows [-fpermissive]
> kSecAuthenticationTypeHTTPDigest = AUTH_TYPE_FIX_ ('httd'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:107:46:
> error: enumerator value for ‘kSecAuthenticationTypeHTTPDigest’ is not an
> integer constant
> kSecAuthenticationTypeHTTPDigest = AUTH_TYPE_FIX_ ('httd'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:108:46:
> error: shift expression ‘(1718579821 << 8)’ overflows [-fpermissive]
> kSecAuthenticationTypeHTMLForm = AUTH_TYPE_FIX_ ('form'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:108:46:
> error: enumerator value for ‘kSecAuthenticationTypeHTMLForm’ is not an
> integer constant
> kSecAuthenticationTypeHTMLForm = AUTH_TYPE_FIX_ ('form'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:109:46:
> error: shift expression ‘(1684434036 << 8)’ overflows [-fpermissive]
> kSecAuthenticationTypeDefault = AUTH_TYPE_FIX_ ('dflt'),
> ^
> /System/Library/Frameworks/Security.framework/Headers/SecKeychain.h:109:46:
> error: enumerator value for ‘kSecAuthenticationTypeDefault’ is not an
> integer constant
> kSecAuthenticationTypeDefault = AUTH_TYPE_FIX_ ('dflt'),
> ^
> In file included from /usr/local/include/c++/8.0.0/bits/ios_base.h:46:0,
> from /usr/local/include/c++/8.0.0/ios:42,
> from /usr/local/include/c++/8.0.0/ostream:38,
> from /usr/local/include/c++/8.0.0/iostream:39,
> from 61759_main.mm:2:
> /usr/local/include/c++/8.0.0/system_error:191:23: internal compiler error:
> Bus error
> explicit operator bool() const noexcept
> ^~~~
> libbacktrace could not find executable to open
> Please submit a full bug report,
> with preprocessed source if appropriate.
> See <https://gcc.gnu.org/bugs/> for instructions.
>
> And my ICE looks similar to the one I get in bug 57607 which also includes
> the c++ <iostream> header...
This error has now disappeared for me, so I can now confirm that I'm getting
the same ICE that you originally reported:
$ /usr/local/bin/g++ 61759_main.mm -fpermissive -o 61759.exe -framework
Foundation -lobjc
during GIMPLE pass: eh
61759_main.mm: In function ‘int main()’:
61759_main.mm:4:5: internal compiler error: in objc_eh_runtime_type, at
objc/objc-next-runtime-abi-01.c:2793
int main (void)
^~~~
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
$
Running in gdb gives this backtrace:
Breakpoint 1, 0x00e60154 in internal_error ()
(gdb) bt
#0 0x00e60154 in internal_error ()
#1 0x014954c5 in fancy_abort ()
#2 0x0118edd7 in objc_eh_runtime_type ()
#3 0x0076e69e in add_type_for_runtime ()
#4 0x0076e715 in gen_eh_region_catch ()
#5 0x00ba90de in lower_eh_constructs_1 ()
#6 0x00baa7fb in (anonymous namespace)::pass_lower_eh::execute ()
#7 0x00a5b2e0 in execute_one_pass ()
#8 0x00a5bba0 in execute_pass_list_1 ()
#9 0x00a5bbee in execute_pass_list ()
#10 0x0067ecb9 in cgraph_node::analyze ()
#11 0x006819ef in analyze_functions ()
#12 0x006829d2 in symbol_table::finalize_compilation_unit ()
#13 0x00b4638b in compile_file ()
#14 0x01af141b in toplev::main ()
#15 0x01af2a24 in main ()
(gdb)
I'd need to rebuild gcc with debug info to get a better backtrace.
>From gcc-bugs-return-574556-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 17:11:21 2017
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Subject: [Bug bootstrap/82087] HEAD fails to bootstrap on x86_64-apple-darwin16.7.0
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d25fe0be@ <d25fe0be at outlook dot com> changed:
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----------------------------------------------------------------------------
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--- Comment #3 from d25fe0be@ <d25fe0be at outlook dot com> ---
Seems to have been fixed. (Before or at r251800.)
>From gcc-bugs-return-574557-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 17:27:01 2017
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From: "sje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/80925] [8 Regression] vect peeling failures
Date: Thu, 07 Sep 2017 17:27:00 -0000
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--- Comment #22 from Steve Ellcey <sje at gcc dot gnu.org> ---
(In reply to Christophe Lyon from comment #21)
> I think this change caused regressions on armeb-none-linux-gnueabihf
> --with-cpu=cortex-a9 --with-fpu=neon-fp16 (works OK
> --with-fpu=vfpv3-d16-fp16)
Ranier Orth reported a failure on SPARC64 as well, here was my reply
to him. I don't know if your problem is the same without seeing the
specific failure.
--
Looking at the checks at the end, I also see that SPARC does include
the 'Alignment' message and Aarch64 does not and that is handled by a
conditional check.
I think the fix is to check for 'vectorized 4 loops' when we support
unaligned vector instructions (vect_hw_misalign is true) and check for
'vectorized 3 loops' otherwise. Does that sound reasonable to you?
I think the reason this worked before is that that loop got vectorized
due to being peeled and my change turned off the peeling and thus it
could not be vectorized on machines that do not support unaligned
vectorization.
>From gcc-bugs-return-574558-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 18:40:29 2017
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Subject: [Bug target/81800] [8 regression] on aarch64 ilp32 lrint should not be inlined as two instructions
Date: Thu, 07 Sep 2017 18:40:00 -0000
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--- Comment #3 from Qing Zhao <qing.zhao at oracle dot com> ---
I can repeat this with the latest upstream gcc on aarch64 machine.
the inlining happens when -fno-math-errno is specified.
and it should be only inlined when -fno-trapping-math is specified.
>From gcc-bugs-return-574559-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 18:54:38 2017
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Subject: [Bug tree-optimization/82135] New: Missed constant propagation through possible unsigned wraparound, with std::align() variable pointer, constant everything else.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82135
Bug ID: 82135
Summary: Missed constant propagation through possible unsigned
wraparound, with std::align() variable pointer,
constant everything else.
Product: gcc
Version: 8.0
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The code in this report is easiest to look at here:
https://godbolt.org/g/DffP3J, with asm output.
When g++ inlines this (copied version of std::align from include/c++/memory),
it fails to optimize to just rounding up to the next power of 2 when
align=size=64 and space=1024, but ptr is variable.
(If __ptr is also constant, it's fine.)
#include <cstdint>
#include <stddef.h>
inline void*
libalign(size_t __align, size_t __size, void*& __ptr, size_t& __space) noexcept
{
const auto __intptr = reinterpret_cast<uintptr_t>(__ptr);
const auto __aligned = (__intptr - 1u + __align) & -__align;
// if (__aligned < __size) __builtin_unreachable();
const auto __diff = __aligned - __intptr;
// if (__diff > __size) __builtin_unreachable();
if ((__size + __diff) > __space)
return (void*)123456; //nullptr; // non-zero constant is obvious in the
asm
else
{
__space -= __diff;
return __ptr = reinterpret_cast<void*>(__aligned);
}
}
void *libalign64(void *voidp) {
std::size_t len = 1024;
//if (voidp+len < voidp) __builtin_unreachable(); // doesn't
help
voidp =
libalign(64, 64, voidp, len);
return voidp;
}
g++ -O3 -std=c++14 -Wall -Wextra (trunk 8.0.0 20170906)
# x86-64. Other targets do the same compare/cmov or branch
leaq 63(%rdi), %rax
andq $-64, %rax
movq %rax, %rdx
subq %rdi, %rdx
addq $65, %rdx
cmpq $1025, %rdx
movl $123456, %edx
cmovnb %rdx, %rax
ret
libalign64 gives exactly the same result as just rounding up to the next power
of 2 (including wrapping around to zero with addresses very close to the top).
But gcc doesn't spot this, I think getting confused about what can happen with
unsigned wraparound.
char *roundup2(char *p) {
auto t = (uintptr_t)p;
t = (t+63) & -64;
return (char*)t;
}
leaq 63(%rdi), %rax
andq $-64, %rax
ret
For easy testing, I made wrappers that call with a constant pointer, so I can
test that it really does wrap around at exactly the same place as roundup2().
(It does: libalign64(-64) = -64, libalign64(-64) = 0.) So it can safely be
compiled to 2 instructions on targets where unsigned integer wraparound works
normally, without all that adding constants and comparing against constants.
static char* const test_constant = (char*)-63ULL;
char *test_roundup2() {
return roundup2(test_constant);
}
void *test_libalign() {
return libalign64(test_constant);
}
Uncommenting this line I added:
if (__diff > __size) __builtin_unreachable();
lets it compile to just two instructions, but that condition isn't really
always true. __diff will be huge when __aligned wraps around.
clang, icc, and msvc also fail to make this optimization. IDK if it's
particularly useful in real life for anything other than abusing std::align as
a simple round-up function.
>From gcc-bugs-return-574560-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 20:12:23 2017
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Subject: [Bug c/82133] unroll-loops too aggressive
Date: Thu, 07 Sep 2017 20:12:00 -0000
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Nick <nickpapior at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |6.3.0
--- Comment #1 from Nick <nickpapior at gmail dot com> ---
I completely forgot to say that there were no problems using GCC-6.3.0 compiler
on the Debian stretch box.
>From gcc-bugs-return-574561-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 20:19:24 2017
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Subject: [Bug c/45784] gcc OpenMP - error: invalid controlling predicate
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--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Sep 7 20:18:45 2017
New Revision: 251848
URL: https://gcc.gnu.org/viewcvs?rev=251848&root=gcc&view=rev
Log:
Backported from mainline
2017-07-27 Jakub Jelinek <jakub@redhat.com>
PR c/45784
* c-omp.c (c_finish_omp_for): If the condition is wrapped in
rhs of COMPOUND_EXPR(s), skip them and readd their lhs into
new COMPOUND_EXPRs around the rhs of the comparison.
* testsuite/libgomp.c/pr45784.c: New test.
* testsuite/libgomp.c++/pr45784.C: New test.
Added:
branches/gcc-7-branch/libgomp/testsuite/libgomp.c++/pr45784.C
branches/gcc-7-branch/libgomp/testsuite/libgomp.c/pr45784.c
Modified:
branches/gcc-7-branch/gcc/c-family/ChangeLog
branches/gcc-7-branch/gcc/c-family/c-omp.c
branches/gcc-7-branch/libgomp/ChangeLog
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Subject: [Bug middle-end/81052] ICE in verify_dominators, at dominance.c:1184
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--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Sep 7 20:19:47 2017
New Revision: 251849
URL: https://gcc.gnu.org/viewcvs?rev=251849&root=gcc&view=rev
Log:
Backported from mainline
2017-08-03 Jakub Jelinek <jakub@redhat.com>
PR middle-end/81052
* omp-low.c (diagnose_sb_0): Handle flag_openmp_simd like flag_openmp.
(pass_diagnose_omp_blocks::gate): Enable also for flag_openmp_simd.
* c-c++-common/pr81052.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/c-c++-common/pr81052.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/omp-low.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug driver/81650] gcc -m32 mishandles -Walloc-size-larger-than’23372036854775807
Date: Thu, 07 Sep 2017 20:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81650
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Sep 7 20:20:43 2017
New Revision: 251850
URL: https://gcc.gnu.org/viewcvs?rev=251850&root=gcc&view=rev
Log:
Backported from mainline
2017-08-03 Jakub Jelinek <jakub@redhat.com>
PR driver/81650
* calls.c (alloc_max_size): Use HOST_WIDE_INT_UC (10??)
instead of 10??LU, perform unit multiplication in wide_int,
don't change alloc_object_size_limit if the limit is larger
than SSIZE_MAX.
* gcc.dg/pr81650.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/pr81650.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/calls.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug target/81621] ICE in delete_insn, at cfgrtl.c:167 with s390x cross compiler
Date: Thu, 07 Sep 2017 20:23:00 -0000
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--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Sep 7 20:23:14 2017
New Revision: 251851
URL: https://gcc.gnu.org/viewcvs?rev=251851&root=gcc&view=rev
Log:
Backported from mainline
2017-08-03 Jakub Jelinek <jakub@redhat.com>
PR target/81621
* bb-reorder.c (pass_partition_blocks::execute): Return TODO_df_finish
after setting changeable df flags.
* gcc.dg/pr81621.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/pr81621.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/bb-reorder.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug c/81687] Compiler drops label in OpenMP region
Date: Thu, 07 Sep 2017 20:27:00 -0000
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--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Sep 7 20:26:34 2017
New Revision: 251853
URL: https://gcc.gnu.org/viewcvs?rev=251853&root=gcc&view=rev
Log:
2017-09-07 Jakub Jelinek <jakub@redhat.com>
Backported from mainline
2017-08-09 Jakub Jelinek <jakub@redhat.com>
PR c/81687
* omp-low.c (omp_copy_decl): Don't remap FORCED_LABEL or DECL_NONLOCAL
LABEL_DECLs.
* tree-cfg.c (move_stmt_op): Don't adjust DECL_CONTEXT of FORCED_LABEL
or DECL_NONLOCAL labels.
(move_stmt_r) <case GIMPLE_LABEL>: Adjust DECL_CONTEXT of FORCED_LABEL
or DECL_NONLOCAL labels here.
* testsuite/libgomp.c/pr81687-1.c: New test.
* testsuite/libgomp.c/pr81687-2.c: New test.
Added:
branches/gcc-7-branch/libgomp/testsuite/libgomp.c/pr81687-1.c
branches/gcc-7-branch/libgomp/testsuite/libgomp.c/pr81687-2.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/omp-low.c
branches/gcc-7-branch/gcc/tree-cfg.c
branches/gcc-7-branch/libgomp/ChangeLog
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Subject: [Bug sanitizer/81923] [ASAN] gcc emites wrong odr asan instrumentation for glibc
Date: Thu, 07 Sep 2017 20:29:00 -0000
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--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Sep 7 20:29:04 2017
New Revision: 251854
URL: https://gcc.gnu.org/viewcvs?rev=251854&root=gcc&view=rev
Log:
Backported from mainline
2017-09-01 Jakub Jelinek <jakub@redhat.com>
PR sanitizer/81923
* asan.c (create_odr_indicator): Strip name encoding from assembler
name before appending it after __odr_asan_.
* gcc.dg/asan/pr81923.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/asan/pr81923.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/asan.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug tree-optimization/82135] Missed constant propagation through possible unsigned wraparound, with std::align() variable pointer, constant everything else.
Date: Thu, 07 Sep 2017 20:31:00 -0000
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--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
This PR is a bit messy, please minimize your examples...
Looking at the dse2 dump (before reassoc messes things up):
__intptr_2 = (const long unsigned int) voidp_9(D);
_3 = __intptr_2 + 63;
__aligned_4 = _3 & 18446744073709551552;
__diff_5 = __aligned_4 - __intptr_2;
_6 = __diff_5 + 64;
if (_6 > 1024)
IIUC, essentially, you would like gcc to realize that __diff_5 is in [0,63], so
the condition is always false.
If aligned was not reused, we could simplify ((x+63)&-64)-x to 63&-x, but we
don't want to do it in general. Maybe we could add a very special case in VRP
(or CCP for nonzero bits)...
(we could also add if(__diff>__align)__builtin__unreachable() in <memory> but
that's getting really specific)
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Subject: [Bug middle-end/81768] [8 Regression] error: control flow in the middle of basic block
Date: Thu, 07 Sep 2017 20:40:00 -0000
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--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Sep 7 20:40:06 2017
New Revision: 251856
URL: https://gcc.gnu.org/viewcvs?rev=251856&root=gcc&view=rev
Log:
Backported from mainline
2017-09-05 Jakub Jelinek <jakub@redhat.com>
PR middle-end/81768
* omp-expand.c (expand_omp_simd): Force second operands of COND_EXPR
into gimple val before gimplification fo the COND_EXPR.
* gcc.dg/gomp/pr81768-1.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/gomp/pr81768-1.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/omp-expand.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/81768] [8 Regression] error: control flow in the middle of basic block
Date: Thu, 07 Sep 2017 20:42:00 -0000
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Sep 7 20:41:42 2017
New Revision: 251857
URL: https://gcc.gnu.org/viewcvs?rev=251857&root=gcc&view=rev
Log:
Backported from mainline
2017-09-05 Jakub Jelinek <jakub@redhat.com>
PR middle-end/81768
* omp-low.c (lower_omp_for): Recompute tree invariant if
gimple_omp_for_initial/final is ADDR_EXPR.
* gcc.dg/gomp/pr81768-2.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/gomp/pr81768-2.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/omp-low.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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Subject: [Bug middle-end/81318] [8 regression] ICE in to_reg_br_prob_base, at profile-count.h:189
Date: Thu, 07 Sep 2017 22:28:00 -0000
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--- Comment #27 from Daniel Black <daniel.black at au dot ibm.com> ---
reduced test case, quite similar however just to be sure:
int a, b;
__attribute__((__cold__)) fn1();
__attribute__((always_inline)) fn2() { fn1(); }
fn3() {
fn2();
if (b)
a = 0;
}
>From gcc-bugs-return-574571-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Sep 07 23:27:30 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82067] G++ has an internal compiler error in possible_polymorphic_call_targets, at ipa-devirt.c:1557
Date: Thu, 07 Sep 2017 23:27:00 -0000
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--- Comment #7 from jupitercuso4 at gmail dot com ---
$ g++ -std=c++11 -O3 --verbose test.i
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/project/usr-tensilica-RHEL5/stools-8.0-2017-06-05/bin/../libexec/gcc/x86_64-pc-linux-gnu/4.9.4/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-4.9.4/configure --with-checking=release
--build=x86_64-pc-linux-gnu --prefix=/usr/xtensa/stools-8.0-2017-06-05
LD_OPTIONS=-R/usr/xtensa/stools-8.0-2017-06-05/lib
--with-gmp=/usr/xtensa/stools-8.0-2017-06-05
--with-mpfr=/usr/xtensa/stools-8.0-2017-06-05 --enable-languages=c,c++
--disable-libgcj
Thread model: posix
gcc version 4.9.4 (GCC)
COLLECT_GCC_OPTIONS='-std=c++11' '-O3' '-v' '-shared-libgcc' '-mtune=generic'
'-march=x86-64'
/project/usr-tensilica-RHEL5/stools-8.0-2017-06-05/bin/../libexec/gcc/x86_64-pc-linux-gnu/4.9.4/cc1plus
-fpreprocessed test.i -quiet -dumpbase test.i -mtune=generic -march=x86-64
-auxbase test -O3 -std=c++11 -version -o /tmp/cc6LMkmh.s
GNU C++ (GCC) version 4.9.4 (x86_64-pc-linux-gnu)
compiled by GNU C version 4.9.4, GMP version 6.1.2, MPFR version 3.1.5,
MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++ (GCC) version 4.9.4 (x86_64-pc-linux-gnu)
compiled by GNU C version 4.9.4, GMP version 6.1.2, MPFR version 3.1.5,
MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: e4a50cb5767031363285860fcbf01e45
test.cpp: In constructor
'xtsc_component::xtsc_queue_pin::xtsc_queue_pin(sc_core::sc_module_name, const
xtsc_component::xtsc_queue_pin_parms&)':
test.cpp:32:1: internal compiler error: in possible_polymorphic_call_targets,
at ipa-devirt.c:1557
xtsc_component::xtsc_queue_pin::xtsc_queue_pin(sc_module_name module_name,
const xtsc_queue_pin_parms& queue_parms) :
^
0x6828cb possible_polymorphic_call_targets(tree_node*, long,
ipa_polymorphic_call_context, bool*, void**, int*)
../../gcc-4.9.4/gcc/ipa-devirt.c:1557
0x665cea possible_polymorphic_call_targets(tree_node*, bool*, void**)
../../gcc-4.9.4/gcc/ipa-utils.h:142
0xc87198 gimple_fold_call
../../gcc-4.9.4/gcc/gimple-fold.c:1127
0xc87198 fold_stmt_1
../../gcc-4.9.4/gcc/gimple-fold.c:1302
0xd909b8 fold_marked_statements
../../gcc-4.9.4/gcc/tree-inline.c:4549
0xd8c2e0 optimize_inline_calls(tree_node*)
../../gcc-4.9.4/gcc/tree-inline.c:4630
0xf48b89 inline_transform(cgraph_node*)
../../gcc-4.9.4/gcc/ipa-inline-transform.c:457
0xd1b58a execute_one_ipa_transform_pass
../../gcc-4.9.4/gcc/passes.c:2066
0xd1b58a execute_all_ipa_transforms()
../../gcc-4.9.4/gcc/passes.c:2107
0xbd8abd expand_function
../../gcc-4.9.4/gcc/cgraphunit.c:1775
0xf99653 expand_all_functions
../../gcc-4.9.4/gcc/cgraphunit.c:1916
0xf99653 compile()
../../gcc-4.9.4/gcc/cgraphunit.c:2260
0xf98f17 finalize_compilation_unit()
../../gcc-4.9.4/gcc/cgraphunit.c:2337
0xb149dd cp_write_global_declarations()
../../gcc-4.9.4/gcc/cp/decl2.c:4647
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
>From gcc-bugs-return-574572-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 00:48:06 2017
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Subject: [Bug target/80568] x86 -mavx256-split-unaligned-load (and store) is affecting AVX2 code, but probably shouldn't be.
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Peter Cordes <peter at cordes dot ca> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Peter Cordes <peter at cordes dot ca> ---
Bug 78762 is asking for the same thing: disable at least load-splitting in
-mtune=generic when -mavx2 is enabled.
Or more generally, ISA-aware tune=generic.
*** This bug has been marked as a duplicate of bug 78762 ***
>From gcc-bugs-return-574573-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 00:48:17 2017
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Subject: [Bug target/78762] Regression: Splitting unaligned AVX loads also when AVX2 is enabled
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----------------------------------------------------------------------------
CC| |peter at cordes dot ca
--- Comment #16 from Peter Cordes <peter at cordes dot ca> ---
*** Bug 80568 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-574574-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 01:30:33 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82136] New: x86: -mavx256-split-unaligned-load should try to fold other shuffles into the load/vinsertf128
Date: Fri, 08 Sep 2017 01:30:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82136
Bug ID: 82136
Summary: x86: -mavx256-split-unaligned-load should try to fold
other shuffles into the load/vinsertf128
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: peter at cordes dot ca
Target Milestone: ---
Target: x86_64-*-*, i?86-*-*
static const int aligned = 0;
void pairs_double(double blocks[]) {
if(aligned) blocks = __builtin_assume_aligned(blocks, 64);
for (int i = 0 ; i<10240 ; i+=2) {
double x = blocks[i];
double y = blocks[i+1];
blocks[i] = x*y;
blocks[i+1] = x+y;
}
}
i.e. load a pair of 64-bit elements and replace them with 2 different
combinations of the pair.
https://godbolt.org/g/Y9eJF3 (also includes a uint64_t version that shuffles
similarly with AVX2). See
https://stackoverflow.com/questions/46038401/unpack-m128i-m256i-to-m64-mmx-sse2-avx2
for the original integer question.
GCC autovectorizes this poorly with AVX, and *very* poorly in the unaligned
case with split loads/stores. It's doing two movupd/vinsertf128 pairs to
emulate a ymm load, and then shuffling with vinsertf128 / vperm2f128. Using
split loads from non-contiguous addresses would definitely allow dropping at
least one shuffle.
with gcc 8.0.0 20170907 -xc -std=gnu11 -O3 -Wall -march=sandybridge
pairs_double:
leaq 81920(%rdi), %rax
.L2:
vmovupd (%rdi), %xmm1
vinsertf128 $0x1, 16(%rdi), %ymm1, %ymm1
addq $64, %rdi
vmovupd -32(%rdi), %xmm2
vinsertf128 $0x1, -16(%rdi), %ymm2, %ymm2
vinsertf128 $1, %xmm2, %ymm1, %ymm0
vperm2f128 $49, %ymm2, %ymm1, %ymm1
vunpcklpd %ymm1, %ymm0, %ymm2
vunpckhpd %ymm1, %ymm0, %ymm0
vmulpd %ymm2, %ymm0, %ymm1
vaddpd %ymm2, %ymm0, %ymm0
vinsertf128 $1, %xmm1, %ymm1, %ymm2
vperm2f128 $49, %ymm1, %ymm1, %ymm1
vinsertf128 $1, %xmm0, %ymm0, %ymm3
vperm2f128 $49, %ymm0, %ymm0, %ymm0
vshufpd $12, %ymm3, %ymm2, %ymm2
vshufpd $12, %ymm0, %ymm1, %ymm0
vmovups %xmm2, -64(%rdi)
vextractf128 $0x1, %ymm2, -48(%rdi)
vextractf128 $0x1, %ymm0, -16(%rdi)
vmovups %xmm0, -32(%rdi)
cmpq %rdi, %rax
jne .L2
vzeroupper
ret
This is obviously pretty horrible, with far too much shuffling just to set up
for a mul and add. Things are not bad with -mprefer-avx128 and aligned
pointers (4x vunpckl/h per 2 vectors), which should be good on Ryzen or
SnB-family, but maybe not faster than scalar on Haswell with limited shuffle
throughput. (Same for the uint64_t version of the same thing.)
>From gcc-bugs-return-574575-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 02:07:14 2017
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Subject: [Bug tree-optimization/82137] New: auto-vectorizing shuffles way to much to avoid duplicate work
Date: Fri, 08 Sep 2017 02:07:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82137
Bug ID: 82137
Summary: auto-vectorizing shuffles way to much to avoid
duplicate work
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: missed-optimization
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(same code as bug 82136, but with aligned pointers, and discussing the overall
vectorization strategy)
static const int aligned = 1;
void pairs_double(double blocks[]) {
if(aligned) blocks = __builtin_assume_aligned(blocks, 64);
for (int i = 0 ; i<10240 ; i+=2) {
double x = blocks[i];
double y = blocks[i+1];
blocks[i] = x*y;
blocks[i+1] = x+y;
}
}
https://godbolt.org/g/pTY5iU has this + a uint64_t version (with ^ and &)
i.e. load a pair of 64-bit elements and replace them with 2 different
combinations of the pair. See
https://stackoverflow.com/questions/46038401/unpack-m128i-m256i-to-m64-mmx-sse2-avx2.
gcc auto-vectorizes this *way* too much shuffling when AVX / AVX2 are
available, same for the integer version. It's especially bad with AVX1 only,
but even AVX2 is a mess and will totally bottleneck on shuffle throughput on
Intel and AMD CPUs (Ryzen has good shuffle throughput, but lane-crossing
shuffles are much more expensive than in-lane).
gcc 8.0.8 -O3 -march=haswell
pairs_double:
leaq 81920(%rdi), %rax
.L2:
vmovapd (%rdi), %ymm1
vmovapd 32(%rdi), %ymm0
addq $64, %rdi
vunpcklpd %ymm0, %ymm1, %ymm2
vunpckhpd %ymm0, %ymm1, %ymm0
vpermpd $216, %ymm2, %ymm2
vpermpd $216, %ymm0, %ymm0
vmulpd %ymm2, %ymm0, %ymm1
vaddpd %ymm2, %ymm0, %ymm0
vpermpd $68, %ymm0, %ymm3
vpermpd $238, %ymm0, %ymm0
vpermpd $68, %ymm1, %ymm2
vpermpd $238, %ymm1, %ymm1
vshufpd $12, %ymm3, %ymm2, %ymm2
vshufpd $12, %ymm0, %ymm1, %ymm0
vmovapd %ymm2, -64(%rdi)
vmovapd %ymm0, -32(%rdi)
cmpq %rdi, %rax
jne .L2
vzeroupper
ret
I haven't worked through the constants to see how its shuffling, but the same
function with uint64_t (and operators ^ &) uses 4 shuffles per 2 vectors after
the actual work:
# vpand / vpxor in ymm0 / ymm1
vpunpcklqdq %ymm0, %ymm1, %ymm2
vpunpckhqdq %ymm0, %ymm1, %ymm0
vperm2i128 $32, %ymm0, %ymm2, %ymm1
vperm2i128 $49, %ymm0, %ymm2, %ymm0
vmovdqa %ymm1, -64(%rdi)
vmovdqa %ymm0, -32(%rdi)
It uses equivalent shuffles to prepare for vpand/vpxor, so vunpckl/hpd + 2x
vperm2f128 should do the same shuffle. Using split stores would help a lot on
Intel and AMD: 2x vmovdqa xmm, then 2x vextractf128 xmm. SnB/HSW/SKL
vextractf128 to memory is 2 fused-domain uops (Agner Fog's table) but there's
no ALU uop. It's just a non-micro-fused store. Since gcc's code horribly
bottlenecks on shuffles, split stores would be a win here.
It's a huge win on Ryzen, where vperm2f128 is 8 uops with 3c throughput.
(-march=ryzen enables -mprefer-avx128, but -march=haswell running on Ryzen is
probably a relevant use-case. When all else is equal for Intel, do something
that doesn't suck on Ryzen.)
----
However, a different strategy entirely is *MUCH* better for most CPUs, and as a
bonus it only needs AVX1 and no lane-crossing shuffles:
Do far less shuffling in exchange for doing more mul/add (or whatever), by
allowing duplicates. Doing the same operation twice is allowed, even when it
can raise FP exceptions (in C and C++).
b0 b1 | b2 b3 # load 256b
b1 b0 | b3 b2 # vshufpd or vpermilpd for in-lane
swap
b0*b1 b1*b0 | b2*b3 b3*b2 # vmulpd
b0+b1 b1+b0 | b2+b3 b3+b2 # vaddpd
b0*b1 b0+b1 | b2*b3 b2+b3 # vblendpd
# store 256b
Per two 128b pairs, that's 1 load, 1 shuffle, 2x FP math, 1 immediate-blend, 1
store. No lane-crossing shuffles is a huge plus for Ryzen (vperm2f128 is very
slow).
That's 6 fused-domain uops on Intel, and should easily run at 1 iter per 1.5
cycles (+ loop overhead), without bottlenecking on any ports. The bottleneck
is the front-end, so unrolling helps.
That's 0.75c per 128b pair. (Slower on SnB/IvB, bottlenecking on load/store
throughput.)
Immediate-blend can run on any port on HSW+, or p0/p5 on SnB (and good
throughput on BD/Ryzen) so it's much more throughput-friendly than using
vunpcklpd to mix the mul and add result vectors. If the operation hadn't been
commutative (e.g. sub instead of add), you might have to use vpunpck.
This same strategy is also optimal for integer booleans with AVX2. (Or
possibly even with AVX1, but using VXORPS / VANDPS will bottleneck on port5 on
SnB-Broadwell, since it wasn't until Skylake that FP booleans run on p015).
>From gcc-bugs-return-574576-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 02:08:17 2017
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Subject: [Bug target/82136] x86: -mavx256-split-unaligned-load should try to fold other shuffles into the load/vinsertf128
Date: Fri, 08 Sep 2017 02:08:00 -0000
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--- Comment #1 from Peter Cordes <peter at cordes dot ca> ---
Whoops, the compiler-explorer link had aligned=1. This one produces the asm I
showed in the original report: https://godbolt.org/g/WsZ5S9
See bug 82137 for a much more efficient vectorization strategy gcc should use
instead, with just in-lane shuffle + blend and some duplicated work.
>From gcc-bugs-return-574578-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 02:50:53 2017
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Subject: [Bug target/82138] [8 Regression] Assembler messages: Error: can't resolve `.got2' {.got2 section} - `.LCF0' {.text.unlikely section}
Date: Fri, 08 Sep 2017 02:50:00 -0000
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--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
This was fixed in r251843 for rs6000.
>From gcc-bugs-return-574577-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 02:50:29 2017
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Subject: [Bug target/82138] New: [8 Regression] Assembler messages: Error: can't resolve `.got2' {.got2 section} - `.LCF0' {.text.unlikely section}
Date: Fri, 08 Sep 2017 02:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82138
Bug ID: 82138
Summary: [8 Regression] Assembler messages: Error: can't
resolve `.got2' {.got2 section} - `.LCF0'
{.text.unlikely section}
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: assemble-failure
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
CC: andrewjenner at gcc dot gnu.org, charlet at gcc dot gnu.org,
unassigned at gcc dot gnu.org
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Target: powerpcspe-*-linux-gnu*
+++ This bug was initially created as a clone of Bug #81979 +++
gas 2.28.1 rejects the code generated by gcc-8.0.0-alpha20170820 snapshot
(r251211) w/ -fPIC -O2 -freorder-blocks-and-partition for the following
snippet:
int du;
void
xf (int ee)
{
int cq;
while (cq < 1)
{
int ox;
for (ox = 0; ox < 4; ++ox)
cq /= (ee != 0) ? 2 : ee;
}
du = 1;
for (;;)
{
}
}
% powerpc-e500v2-linux-gnuspe-gcc-8.0.0-alpha20170820 -fPIC -O2
-freorder-blocks-and-partition -c v8qdkqlm.c
/tmp/cchaREkd.s: Assembler messages:
/tmp/cchaREkd.s:15: Error: can't resolve `.got2' {.got2 section} - `.LCF0'
{.text.unlikely section}
>From gcc-bugs-return-574579-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 05:48:05 2017
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Subject: [Bug target/82139] New: unnecessary movapd with _mm_castsi128_pd to use BLENDPD on __m128i results
Date: Fri, 08 Sep 2017 05:48:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82139
Bug ID: 82139
Summary: unnecessary movapd with _mm_castsi128_pd to use
BLENDPD on __m128i results
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
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Target: x86_64-*-*, i?86-*-*
#include <immintrin.h>
#include <stdint.h>
// stripped down from a real function that did something more useful
void foo(uint64_t blocks[]) {
for (int i = 0 ; i<10240 ; i+=2) {
__m128i v = _mm_loadu_si128((__m128i*)&blocks[i]);
__m128i t1 = _mm_add_epi32(v, _mm_set1_epi32(1));
__m128i t2 = _mm_add_epi32(v, _mm_set1_epi32(-1));
__m128d blend = _mm_blend_pd(_mm_castsi128_pd(t1),
_mm_castsi128_pd(t2), 2);
// is this even aliasing-safe? Could cast back to __m128i
_mm_storeu_pd((double*)(__m128d*)&blocks[i], blend);
}
}
https://godbolt.org/g/im1kcc for source and gcc-trunk asm output (and the
slightly larger version of this function that I simplified).
blendpd/blendps have better throughput than pblendw on Intel CPUs, so I played
with that in this function I was looking at.
gcc4.8 and later waste a MOVAPD for no reason instead of clobbering one of the
PADDD results with the blend. (The larger version of this function,
pairs_u64_sse2 in the godbolt link, avoids the extra MOVAPD with gcc4.9.4 and
earlier, but not in foo(). So maybe it's just by chance, or maybe 4.8 changed
something. Anyway, still present in 7.2 and 8.0-trunk, and with -O2 or -O3
(GCC-Explorer-Build) 8.0.0 20170907 -xc -std=gnu99 -O3 -Wall -msse4 -mno-avx
foo:
pcmpeqd %xmm2, %xmm2
leaq 81920(%rdi), %rax
movdqa .LC0(%rip), %xmm3
.L6:
movdqa %xmm3, %xmm1
addq $16, %rdi
movdqu -16(%rdi), %xmm0
paddd %xmm0, %xmm1
movapd %xmm1, %xmm4
paddd %xmm2, %xmm0
blendpd $2, %xmm0, %xmm4
movups %xmm4, -16(%rdi)
cmpq %rdi, %rax
jne .L6
rep ret
Notice that BLENDPD's operands aren't the two output registers from the PADDD
instructions. Different versions/options (like -mtune=skylake) put the extra
MOVAPD between the PADDD instructions, or right before BLENDPD, so don't let it
fool you. :P
With the function even simpler (like only one _mm_add_epi32), blending between
the original load result and the add result didn't appear to have an extra
MOVAPD
>From gcc-bugs-return-574580-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 06:00:49 2017
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Subject: [Bug c/82140] New: "internal compiler error: Illegal instruction" on function exp
Date: Fri, 08 Sep 2017 06:00:00 -0000
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Bug ID: 82140
Summary: "internal compiler error: Illegal instruction" on
function exp
Product: gcc
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Status: UNCONFIRMED
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Priority: P3
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$ cat b.c
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
int main()
{
double a=4 * exp(-0.5);
printf("a=%f\n",a);
exit(0);
}
$ /auto/home/lsbuild/desktop-573285/usr/bin/gcc -Wall -Wextra
-fno-strict-aliasing -fwrapv b.c -o a.out -lm
b.c: In function ‘main’:
b.c:7:3: internal compiler error: Illegal instruction
double a=4 * exp(-0.5);
^
0x7d5d0f crash_signal
../../gcc-4.8.3-20140911/gcc/toplev.c:335
0x2b6b80b0163f ???
/rpmbuild/BUILD/glibc-2.17-c758a686/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
The bug is not reproducible, so it is likely a hardware or OS problem.
$ /auto/home/lsbuild/desktop-573285/usr/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/auto/home/lsbuild/desktop-573285/usr/bin/gcc
COLLECT_LTO_WRAPPER=/auto/toolset_nfs/toolchain/desktop-573285/usr/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.8.3/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.8.3-20140911/configure
--prefix=/auto/home/lsbuild/desktop-573285/usr
--libdir=/auto/home/lsbuild/desktop-573285/usr/lib64
--libexecdir=/auto/home/lsbuild/desktop-573285/usr/libexec
--with-build-time-tools=/auto/home/lsbuild/desktop-573285/usr/bin
--with-as=/auto/home/lsbuild/desktop-573285/usr/bin/as
--with-ld=/auto/home/lsbuild/desktop-573285/usr/bin/ld
--with-libelf-include=/auto/home/lsbuild/desktop-573285/usr/include
--with-libelf-lib=/auto/home/lsbuild/desktop-573285/usr/lib64
--with-native-system-header-dir=/auto/home/lsbuild/desktop-573285/usr/include
--enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-c99
--enable-long-long --enable-clocale=gnu --enable-languages=c,c++
--enable-multilib --disable-libgcj --disable-libquadmath
--disable-libunwind-exceptions --with-system-zlib
--with-gmp-lib=/auto/home/lsbuild/desktop-573285/usr/lib64
--with-gmp-include=/auto/home/lsbuild/desktop-573285/usr/include
--with-mpfr-lib=/auto/home/lsbuild/desktop-573285/usr/lib64
--with-mpfr-include=/auto/home/lsbuild/desktop-573285/usr/include
--with-mpc-lib=/auto/home/lsbuild/desktop-573285/usr/lib64
--with-mpc-include=/auto/home/lsbuild/desktop-573285/usr/include
Thread model: posix
gcc version 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC)
seems only exp function cause this problem, the gcc behavior is normal if no
exp() called.
$ cat c.c
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
int main()
{
double a=4 * sqrt(2.0);
printf("a=%f\n",a);
exit(0);
}
$ /auto/home/lsbuild/desktop-573285/usr/bin/gcc -Wall -Wextra
-fno-strict-aliasing -fwrapv c.c -o a.out -lm
$ ./a.out
a=5.656854
>From gcc-bugs-return-574581-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 06:07:33 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82140] "internal compiler error: Illegal instruction" on function exp
Date: Fri, 08 Sep 2017 06:07:00 -0000
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is GMP crashing. Maybe you misconfigure GMP. GMP configures usually for
the processor you are on when you configure/compile it. So if you move that
installation to another (older) machine, you get crashes like this.
>From gcc-bugs-return-574582-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 06:52:38 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/82141] New: [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Fri, 08 Sep 2017 06:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82141
Bug ID: 82141
Summary: [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE :
rtsfind.adb:851 on darwin
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: dominiq at lps dot ens.fr
CC: ebotcazou at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-apple-darwin16
Target: x86_64-apple-darwin16
Build: x86_64-apple-darwin16
Bootstrap fails on darwin at r251817 (251529 is OK):
/opt/gcc/build_w/./gcc/xgcc -B/opt/gcc/build_w/./gcc/
-B/opt/gcc/gcc8w/x86_64-apple-darwin16.7.0/bin/
-B/opt/gcc/gcc8w/x86_64-apple-darwin16.7.0/lib/ -isystem
/opt/gcc/gcc8w/x86_64-apple-darwin16.7.0/include -isystem
/opt/gcc/gcc8w/x86_64-apple-darwin16.7.0/sys-include -c -g -O2 -fno-common
-W -Wall -gnatpg -nostdinc g-exptty.adb -o g-exptty.o
raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851
>From gcc-bugs-return-574583-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 07:20:32 2017
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From: "peter at cordes dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82142] New: struct zeroing should use wide stores instead of avoiding overwriting padding
Date: Fri, 08 Sep 2017 07:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82142
Bug ID: 82142
Summary: struct zeroing should use wide stores instead of
avoiding overwriting padding
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: peter at cordes dot ca
Target Milestone: ---
(not sure if tree-optimization is the right "component", please check.)
Zeroing a struct (by assignment from an all-zero struct) is inefficient for
structs too small to inline rep stos or memset, if they have padding. Store
coalescing happens (yay, huge improvement over gcc6!), but only if it won't
write any padding. I assume assignment from non-zero struct constants is like
this, too.
Note also that gcc zeros two registers for two 16-bit stores, instead of
reusing a zeroed reg.
Also note that Haswell doesn't have LCP stalls for a `mov` with 16-bit
immediate, only for ALU, so there's no need to avoid it. But if you *are*
going to zero a register, you should use it as the source for all the integer
mov instructions to save code-size. (And avoid filling up space in the uop
cache with immediates). Sandybridge-family no longer has register-read-port
stalls (P6 / Core2 / Nehalem), and even there a recently-written register is
fine for several cycles.
https://godbolt.org/g/AT7yfs
typedef struct {
int a,b,c;
char j,k, k1;
// 1B of padding
int l,m,n[8];
char c1,c2;
// 2B of padding
}foo;
int sf = sizeof(foo);
sf:
.long 60 # bytes long
void assignzero(foo *p) {
foo tmp = {};
*p = tmp;
}
(GCC-Explorer-Build) 8.0.0 20170907 -xc -std=c11 -O3 -march=haswell
assignzero:
pushq %rbp
xorl %eax, %eax # zero a reg to avoid mov $imm16, (mem)
vpxor %xmm0, %xmm0, %xmm0
xorl %edx, %edx # and another one, instead of reusing
eax??
movq $0, (%rdi)
movl $0, 8(%rdi)
movq %rsp, %rbp # make a stack frame because of the ymm? At
least it doesn't do something with %r10 like gcc7.2
movw %ax, 12(%rdi)
movb $0, 14(%rdi)
# avoiding a store to 1B of padding
vmovdqu %ymm0, 16(%rdi) # bunch of int members
movq $0, 48(%rdi)
movw %dx, 56(%rdi)
vzeroupper
popq %rbp
ret
So 1B of padding cost us 4 narrow stores instead of one 16B store at the front
of the struct. This also uses AVX for a single 256b store; very likely not
worth it.
// what we would like to see, more or less
void charzero(char *p) {
__builtin_memset(p, 0, sizeof(foo));
}
charzero:
vpxor %xmm0, %xmm0, %xmm0
movq $0, 48(%rdi)
vmovups %xmm0, (%rdi)
vmovups %xmm0, 16(%rdi)
vmovups %xmm0, 32(%rdi)
movl $0, 56(%rdi)
ret
This chooses not to use 256b AVX, so no vzeroupper, and no slow-mode while
warming up the upper-half of execution units / data bus. (Agner's description
sounds like it applies to stores:
http://agner.org/optimize/blog/read.php?i=415). Also no triggering a lower
turbo threshold. All of this is probably good for a tiny function.
We could save some code-size by replacing the integer mov $0 stores with vmovq
%xmm0, 48(%rdi). That's probably not good for Bulldozer-family (shared vector
unit between two integer cores), so maybe only enable that with a -march=znver1
or sandybridge-family CPU. (xor-zeroing takes zero cycles on Intel SnB-family,
so xmm0 is ready as a source for the store in the same cycle that vpxor issues.
I guess it's possible that an integer store can execute 1 cycle sooner than an
AVX 8-byte store, so if there weren't already any stores waiting to execute,
and store-port throughput was about to become a bottleneck in later code, it
makes sense. Maybe only do it for the last store, using a 4-byte vmovd %xmm0,
56(%rdi))
Or better (on Haswell and especially Skylake): use overlapping vector stores
like clang has been doing since 3.7, and like glibc memcpy does for small
copies:
# clang (trunk) -O3 -march=haswell
assignzero: # same code for clang's memset
vxorps %xmm0, %xmm0, %xmm0
vmovups %ymm0, 28(%rdi) # last 32 bytes
vmovups %ymm0, (%rdi) # first 32 bytes, overlapping by 4
vzeroupper
retq
Having to use vzeroupper here is questionable.
4 xmm stores (with the last one overlapping) might be a better choice here, but
I haven't tried to measure the effect of scattered uses of AVX. When tuning
for Sandybridge, clang only uses 128b stores here.
>From gcc-bugs-return-574584-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 07:50:42 2017
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Subject: [Bug tree-optimization/82135] Missed constant propagation through possible unsigned wraparound, with std::align() variable pointer, constant everything else.
Date: Fri, 08 Sep 2017 07:50:00 -0000
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--- Comment #2 from Peter Cordes <peter at cordes dot ca> ---
(In reply to Marc Glisse from comment #1)
> This PR is a bit messy, please minimize your examples...
Sorry, looking at it again later I could have done better. I thought it was
somewhat relevant that this was from gcc's own header and had (weird) use-cases
that didn't optimize well, otherwise I prob. would have reduced it more in the
first place.
> IIUC, essentially, you would like gcc to realize that __diff_5 is in [0,63],
> so the condition is always false.
Yes, exactly.
> (we could also add if(__diff>__align)__builtin__unreachable() in <memory> but that's getting really specific)
I was too sleepy to figure out that was the real always-true condition to look
for. Hence my other random __builtin__unreachable() attempts. :P
IDK how much use std::align gets, and if so whether it's common to use it in
cases where many of the inputs are constants after inlining. It might be
interesting to look at how it optimizes with fewer of the inputs constant (like
maybe just align, or align and space). If that __builtin__unreachable() helps
in any other cases, it might be worth considering.
>From gcc-bugs-return-574585-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 08:16:42 2017
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Subject: [Bug fortran/82143] New: add a -fdefault-real-16 flag
Date: Fri, 08 Sep 2017 08:16:00 -0000
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Bug ID: 82143
Summary: add a -fdefault-real-16 flag
Product: gcc
Version: 8.0
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gfortran currently knows the options -fdefault-real-8 and -fdefault-double-8.
It would be useful to add an -fdefault-real-16 (corresponding to ifort's
-real-size 128) and maybe also -fdefault-double-16.
For completeness, also -fdefault-real-4 might be worth adding (which would
correspond to the current default behavior).
>From gcc-bugs-return-574586-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 08:29:20 2017
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Subject: [Bug c++/82144] New: ice in add_dwarf_attr with alignas
Date: Fri, 08 Sep 2017 08:29:00 -0000
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Bug ID: 82144
Summary: ice in add_dwarf_attr with alignas
Product: gcc
Version: 8.0
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From the C++ testsuite, source code file ./g++.dg/cpp0x/alignas7.C
won't compile when -g is used.
$ ~/gcc/results/bin/gcc -g ./g++.dg/cpp0x/alignas7.C
./g++.dg/cpp0x/alignas7.C: In instantiation of ‘struct A<8, char>’:
./g++.dg/cpp0x/alignas7.C:13:1: required from here
./g++.dg/cpp0x/alignas7.C:7:24: internal compiler error: in add_dwarf_attr, at
dwarf2out.c:4132
enum alignas (N) E : T;
^
0xa1ff0e add_dwarf_attr
../../trunk/gcc/dwarf2out.c:4132
0xa1ff88 add_AT_unsigned
../../trunk/gcc/dwarf2out.c:4215
0xa1ff88 add_alignment_attribute
../../trunk/gcc/dwarf2out.c:20197
0xa571b7 gen_enumeration_type_die
../../trunk/gcc/dwarf2out.c:21261
$ ~/gcc/results/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/home/dcb/gcc/results/bin/gcc
COLLECT_LTO_WRAPPER=/home/dcb/gcc/results.251861/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../trunk/configure --prefix=/home/dcb/gcc/results.251861
--disable-bootstrap --disable-multilib --disable-werror
--enable-checking=df,extra,fold,rtl,yes --enable-languages=c,c++,fortran
Thread model: posix
gcc version 8.0.0 20170908 (experimental) (GCC)
The bug seems to occur between revisions 251689 and 251751
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Subject: [Bug bootstrap/82141] [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Fri, 08 Sep 2017 08:36:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
We're waiting for Simon's patch at this point.
*** This bug has been marked as a duplicate of bug 80556 ***
>From gcc-bugs-return-574587-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 08:36:55 2017
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80556
--- Comment #45 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
*** Bug 82141 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-574589-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 08:52:25 2017
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From: "andrey.y.guskov at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/82145] New: [8 regression] i386/pr38988.c, i386/pr46254.c, i386/pr55154.c, i386/pr81766.c fails
Date: Fri, 08 Sep 2017 08:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82145
Bug ID: 82145
Summary: [8 regression] i386/pr38988.c, i386/pr46254.c,
i386/pr55154.c, i386/pr81766.c fails
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: andrey.y.guskov at intel dot com
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Since r251606, these three tests began failing in GCC make check, coupled with
the new test added in the very patch:
FAIL: gcc.target/i386/pr38988.c (internal compiler error)
FAIL: gcc.target/i386/pr38988.c (test for excess errors)
FAIL: gcc.target/i386/pr46254.c (internal compiler error)
FAIL: gcc.target/i386/pr46254.c (test for excess errors)
FAIL: gcc.target/i386/pr55154.c (internal compiler error)
FAIL: gcc.target/i386/pr55154.c (test for excess errors)
FAIL: gcc.target/i386/pr81766.c (internal compiler error) <-- new test
FAIL: gcc.target/i386/pr81766.c (test for excess errors)
>From gcc-bugs-return-574590-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 08:57:50 2017
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Subject: [Bug middle-end/82145] [8 regression] i386/pr38988.c, i386/pr46254.c, i386/pr55154.c, i386/pr81766.c fails
Date: Fri, 08 Sep 2017 08:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82145
--- Comment #1 from Andrey Guskov <andrey.y.guskov at intel dot com> ---
Option set:
-with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-shared
--enable-host-shared --enable-clocale=gnu --enable-cloog-backend=isl
--enable-languages=c,c++,fortran,jit,lto --with-arch=haswell --with-cpu=haswell
>From gcc-bugs-return-574591-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 09:11:18 2017
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From: "maasoftware at yandex dot ru" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82146] New: if (&pdo) is always true error
Date: Fri, 08 Sep 2017 09:11:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82146
Bug ID: 82146
Summary: if (&pdo) is always true error
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
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Priority: P3
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//
// Linux Debian 9 Stretch x64 g++ 6.3.0
// -O2 or -O3 optimization option
// g++ -c -pipe -W -O3 -I. -I.. -I/usr/local/include -o file.o file.cpp
//
int CMyClass::MyFunc(_qword FileNum, CMaaString &Path, CMaaXmlDocument &doc)
{
....
if (CMaaFile::IsAFile(FileName))
{
if (&Path)
{
Path = FileName; // GPFault when Path is passed as *(CMaaString
*)NULL
}
doc = _doc;
return true;
}
....
}
int CMyClass::MyFunc2()
{
...
return MyFunc(Num, *(CMaaString *)NULL, doc); // produces GPF
...
}
>From gcc-bugs-return-574592-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 09:13:51 2017
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Subject: [Bug c++/82146] if (&pdo) is always true error
Date: Fri, 08 Sep 2017 09:13:00 -0000
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--- Comment #1 from MaaSoftware <maasoftware at yandex dot ru> ---
it is a sample,
int CMyClass::MyFunc
can be as
bool CMyClass::MyFunc
>From gcc-bugs-return-574593-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 09:14:23 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/82141] [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Fri, 08 Sep 2017 09:14:00 -0000
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> We're waiting for Simon's patch at this point.
For how long?
> *** This bug has been marked as a duplicate of bug 80556 ***
I doubt it since I am using
../work/configure --prefix=/opt/gcc/gcc8w
--enable-languages=c,c++,fortran,objc,obj-c++,ada,lto --with-gmp=/opt/mp-new
--with-system-zlib --with-isl=/opt/mp-new --enable-lto --enable-plugin
--with-arch=corei7 --with-cpu=corei7 --with-stage1-ldflags=-static-libstdc++
--with-boot-ldflags=-static-libstdc++
which is supposed to be a work around pr80556.
>From gcc-bugs-return-574594-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 09:35:31 2017
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Subject: [Bug fortran/82143] add a -fdefault-real-16 flag
Date: Fri, 08 Sep 2017 09:35:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-09-08
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
My experience with real-16 is that it is very very slow, as in barely usable.
In top of that the -fdefault-* has been the subject of lot of discussions and
should not be used in "production" codes. Thus I am against this addition.
Note that -fdefault-real-8 implies -fdefault-double-16.
>From gcc-bugs-return-574595-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 09:39:19 2017
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Subject: [Bug ada/80888] Wide_Text_IO defaults to bracket encoding even if -gnatW8 specified
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--- Comment #3 from Arnaud Charlet <charlet at gcc dot gnu.org> ---
Author: charlet
Date: Fri Sep 8 09:38:38 2017
New Revision: 251874
URL: https://gcc.gnu.org/viewcvs?rev=251874&root=gcc&view=rev
Log:
2017-09-08 Bob Duff <duff@adacore.com>
PR ada/80888
* a-textio.adb, a-witeio.adb, a-ztexio.adb (Set_WCEM): Use
Default_WCEM by default (i.e. if the encoding is not specified
by the Form string).
Modified:
trunk/gcc/ada/a-textio.adb
trunk/gcc/ada/a-witeio.adb
trunk/gcc/ada/a-ztexio.adb
>From gcc-bugs-return-574596-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 09:39:55 2017
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Subject: [Bug ada/80888] Wide_Text_IO defaults to bracket encoding even if -gnatW8 specified
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Arnaud Charlet <charlet at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |charlet at gcc dot gnu.org
Resolution|--- |FIXED
Target Milestone|--- |8.0
--- Comment #4 from Arnaud Charlet <charlet at gcc dot gnu.org> ---
Should be fixed
>From gcc-bugs-return-574597-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 09:56:33 2017
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Subject: [Bug c++/82146] if (&pdo) is always true error
Date: Fri, 08 Sep 2017 09:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82146
Marc Glisse <glisse at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
Null references are illegal, use pointers if you want to use null pointers.
>From gcc-bugs-return-574598-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 10:07:32 2017
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Subject: [Bug middle-end/82145] [8 regression] i386/pr38988.c, i386/pr46254.c, i386/pr55154.c, i386/pr81766.c fails
Date: Fri, 08 Sep 2017 10:07:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-08
CC| |jakub at redhat dot com
Ever confirmed|0 |1
--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Confirmed, fails also with vanilla mainline using:
-O2 -fpic -mcmodel=large -march=haswell
$ ~/gcc-build/gcc/cc1 -O2 -fpic -mcmodel=large -march=haswell -quiet pr38988.c
during RTL pass: postreload
pr38988.c: In function ‘__do_global_dtors_aux’:
pr38988.c:24:1: internal compiler error: in cselib_hash_rtx, at cselib.c:1277
}
^
0x998ef0 cselib_hash_rtx
../../git/gcc/gcc/cselib.c:1277
0x995433 cselib_lookup_1
../../git/gcc/gcc/cselib.c:2068
0x995433 cselib_lookup(rtx_def*, machine_mode, int, machine_mode)
../../git/gcc/gcc/cselib.c:2117
0xc4c3c5 reload_cse_simplify_operands
../../git/gcc/gcc/postreload.c:471
0xc4cdad reload_cse_simplify
../../git/gcc/gcc/postreload.c:179
0xc4cdad reload_cse_regs_1
../../git/gcc/gcc/postreload.c:218
0xc4e80b reload_cse_regs
../../git/gcc/gcc/postreload.c:64
0xc4e80b execute
../../git/gcc/gcc/postreload.c:2346
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Subject: [Bug middle-end/82145] [8 regression] i386/pr38988.c, i386/pr46254.c, i386/pr55154.c, i386/pr81766.c fails
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.0
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
#2 0x0000000000998ef1 in cselib_hash_rtx(rtx_def*, int, machine_mode) () at
../../git/gcc/gcc/cselib.c:1277
1277 gcc_unreachable ();
(gdb) list
1272 case 't':
1273 /* unused */
1274 break;
1275
1276 default:
1277 gcc_unreachable ();
1278 }
1279 }
1280
1281 return hash ? hash : 1 + (unsigned int) GET_CODE (x);
(gdb) f 3
#3 0x0000000000995434 in cselib_lookup_1 (memmode=E_VOIDmode, create=0,
mode=E_VOIDmode, x=0x2aaaae7bbdc0) at ../../git/gcc/gcc/cselib.c:2068
2068 hashval = cselib_hash_rtx (x, create, memmode);
(gdb) p debug_rtx (x)
(note/s 43 50 44 2 "" NOTE_INSN_DELETED_LABEL 8)
$1 = void
>From gcc-bugs-return-574600-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 10:24:42 2017
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Subject: [Bug bootstrap/82141] [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Fri, 08 Sep 2017 10:24:00 -0000
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--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> For how long?
Only God really knows I presume... You can try the latest iteration:
https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00045.html
> I doubt it since I am using
>
> ../work/configure --prefix=/opt/gcc/gcc8w
> --enable-languages=c,c++,fortran,objc,obj-c++,ada,lto --with-gmp=/opt/mp-new
> --with-system-zlib --with-isl=/opt/mp-new --enable-lto --enable-plugin
> --with-arch=corei7 --with-cpu=corei7 --with-stage1-ldflags=-static-libstdc++
> --with-boot-ldflags=-static-libstdc++
>
> which is supposed to be a work around pr80556.
Then you should mention it in the PR, this is very confusing. But yes, it's
the same error and the same issue, no discussion about that.
>From gcc-bugs-return-574601-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 10:56:33 2017
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From: "maasoftware at yandex dot ru" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/82146] if (&pdo) is always true error
Date: Fri, 08 Sep 2017 10:56:00 -0000
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--- Comment #3 from MaaSoftware <maasoftware at yandex dot ru> ---
Ok. So, it is need to review such code according new standard.
PS: g++ 4.9.2 (Debian 8 Jessie) is compilling code above right.
But it is not sufficient for 6.3.0 to write a function like
void NotWorkedBugAround(CMaaString *a, CMaaString b)
{
if (a)
{
*a = b;
}
}
and call
NotWorkedBugAround(&Path, FileName);
instead of
if (&Path)
{
Path = FileName;
}
to avoid wrong NULL references handling. (Tested with -O2 and -O3).
>From gcc-bugs-return-574602-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 11:04:59 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/82146] if (&pdo) is always true error
Date: Fri, 08 Sep 2017 11:04:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This has nothing to do with a new standard, *(CMaaString *)NULL is simply
undefined behaviour, and that has alawys been true. You cannot dereference a
null pointer.
The bug is there, not inside MyFunc or inside NotWorkedAround. Stop
dereferencing null pointers.
If the code worked in the past that doesn't make it correct. It was wrong then
and it's wrong now. Because dereferencing a null pointer is undefined you
cannot expect consistent results. What happens can change depending on
optimization level or compiler version.
>From gcc-bugs-return-574603-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 11:06:06 2017
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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82143] add a -fdefault-real-16 flag
Date: Fri, 08 Sep 2017 11:06:00 -0000
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kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kargl at gcc dot gnu.org
--- Comment #2 from kargl at gcc dot gnu.org ---
(In reply to janus from comment #0)
> gfortran currently knows the options -fdefault-real-8 and -fdefault-double-8.
>
> It would be useful to add an -fdefault-real-16 (corresponding to ifort's
> -real-size 128) and maybe also -fdefault-double-16.
>
> For completeness, also -fdefault-real-4 might be worth adding (which would
> correspond to the current default behavior).
Actaully, the -fdefault-real* and -fdefault-integer-* options
should be deprecated. These options are broken by design, and
probably do not do what one wants. Use the -freal-4-real-16
(and similar options).
% cat cat a.f90
program foo
real x
x = 1. / 3.
print *, x
end program foo
% gfortran6 -static -o z a.f90 && ./z
0.333333343
% gfortran6 -static -o z -freal-4-real-16 a.f90 && ./z
0.333333333333333333333333333333333317
>From gcc-bugs-return-574604-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 11:40:46 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82146] if (&pdo) is always true error
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--- Comment #5 from MaaSoftware <maasoftware at yandex dot ru> ---
Ok.
I am sorry,
return MyFunc(Num, *(CMaaString *)NULL, doc); // produces GPF in calling method
not here.
I have think before what all references are object memory pointers inside
compiller, just it is more easy working with references of objects not with
pointers in most ways. And no warning generated to *(CMaaString *)NULL code.
CXXFLAGS = -pipe -W -O3 -fpermissive
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From: "janus at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82143] add a -fdefault-real-16 flag
Date: Fri, 08 Sep 2017 12:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82143
--- Comment #3 from janus at gcc dot gnu.org ---
(In reply to kargl from comment #2)
> Actaully, the -fdefault-real* and -fdefault-integer-* options
> should be deprecated. These options are broken by design,
I don't know what that means. And no one else does, because the documentation
does not say anything about it.
> and probably do not do what one wants.
That depends on what you want, I guess. What they do is documented rather
clearly, isn't it? So, people with reading abilities should be able to use them
without any surprises.
> Use the -freal-4-real-16 (and similar options).
From the documentation of those options it sounds like they only affect
variables with explicit kind declaration, but not those with implicit / default
kind.
If that is true, they are not able to fully replace the unbeloved
-fdefault-real-* options.
If it is not true, obviously the documentation needs to be improved.
> % cat cat a.f90
> program foo
> real x
> x = 1. / 3.
> print *, x
> end program foo
> % gfortran6 -static -o z a.f90 && ./z
> 0.333333343
> % gfortran6 -static -o z -freal-4-real-16 a.f90 && ./z
> 0.333333333333333333333333333333333317
Your test case seems to suggest that the latter of the two aforementioned
options is true. From earlier experiments I believe I remember the opposite,
though. So either the implementation has changed over time, or I'm just
misremembering ...
>From gcc-bugs-return-574606-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 12:32:02 2017
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Fri, 08 Sep 2017 12:32:00 -0000
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--- Comment #46 from simon at pushface dot org ---
I posted my darwin.h patch at
https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00045.html on 1 September -
hasn’t attracted any notice yet.
>From gcc-bugs-return-574607-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 13:44:59 2017
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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug testsuite/82120] FAIL: gcc.dg/tree-ssa/pr81588.c
Date: Fri, 08 Sep 2017 13:44:00 -0000
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--- Comment #11 from Christophe Lyon <clyon at gcc dot gnu.org> ---
I've added the -mbranch-cost=N option to the arm target, but compiling
/gcc.dg/tree-ssa/pr81588.c with
-mcpu=cortex-a5 -mfpu=vfpv3-d16 -O2 -fdump-tree-reassoc1-details
-mbranch-cost=N -S -o pr81588.s
never produces the required trace in the dumps, whatever the value of N (0..3).
Switching to cortex-a9 always works.
>From gcc-bugs-return-574608-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 14:18:43 2017
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Subject: [Bug target/82147] New: Autovectorization for extraction is slower than done manually
Date: Fri, 08 Sep 2017 14:18:00 -0000
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Bug ID: 82147
Summary: Autovectorization for extraction is slower than done
manually
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
Target Milestone: ---
Target: aarch64
Take:
void f(float *restrict a, float * restrict b, float * restrict c)
{
for(int i = 0; i< 1024;i++)
{
a[i] = c[i*2];
b[i] = c[i*2 + 1];
}
}
#define vector8 __attribute__((vector_size(8)))
void f1(float *restrict a, float * restrict b, float * restrict c)
{
for(int i = 0; i< 1024;i++)
{
vector8 float d = *(vector8 float *)&c[i*2];
a[i] = d[0];
b[i] = d[1];
}
}
--- CUT ---
I would have expected f and f1 produce the same code but f does ld2 followed by
two quad stores while f1 does a ldr(d) and then does a str(s) and st1(s). For
most processors, ld2/str(q)/str(q) is going to be slower than doing ldr/str/st1
as far as I can tell.
I noticed this after the last talk about the auto-vectorizing.
>From gcc-bugs-return-574609-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 14:26:58 2017
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Subject: [Bug target/82147] Autovectorization for extraction is slower than done manually
Date: Fri, 08 Sep 2017 14:26:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
It is even worse for float*4->float*2,float*2.
Take (ignore the obvious aliasing issues):
void f(float *restrict a, float * restrict b, float * restrict c, int s)
{
for(int i = 0; i< s;i++)
{
a[i*2] = c[i*4];
a[i*2+1] = c[i*4+1];
b[i*2] = c[i*4 + 2];
b[i*2+1] = c[i*4 + 3];
}
}
#define vector16 __attribute__((vector_size(16)))
void f1(float *restrict a, float * restrict b, float * restrict c, int s)
{
for(int i = 0; i< s;i++)
{
vector16 double d = *(vector16 double*)&c[i*2];
*(double*)&a[i*2] = d[0];
*(double*)&b[i*2] = d[1];
}
}
>From gcc-bugs-return-574610-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 14:33:06 2017
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82143] add a -fdefault-real-16 flag
Date: Fri, 08 Sep 2017 14:33:00 -0000
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--- Comment #4 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Fri, Sep 08, 2017 at 12:31:12PM +0000, janus at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82143
>
> --- Comment #3 from janus at gcc dot gnu.org ---
> (In reply to kargl from comment #2)
> > Actaully, the -fdefault-real* and -fdefault-integer-* options
> > should be deprecated. These options are broken by design,
>
> I don't know what that means. And no one else does, because
> the documentation does not say anything about it.
>
> > and probably do not do what one wants.
>
> That depends on what you want, I guess. What they do is documented rather
> clearly, isn't it? So, people with reading abilities should be able
> to use them without any surprises.
I wrote the code for those options. Although it may appear to
work for a typical user, these options have some underlying
issues. I submitted a patch a few years ago to deprecate the
options. That did not go over too well.
One the big hidden issues that typical users never consider is
storage association. When -fdefault-real-8 promotes REAL to
DOUBLE PRECISION and DOUBLE PRECISION to REAL(16), there was
an attempt to maintain storage assocation. This as done too
naively.
> > Use the -freal-4-real-16 (and similar options).
>
> > From the documentation of those options it sounds like they only
> > affect variables with explicit kind declaration, but not those
> > with implicit / default kind.
>
> If that is true, they are not able to fully replace the unbeloved
> -fdefault-real-* options.
>
> If it is not true, obviously the documentation needs to be improved.
The best way to fix the documentation is to remove the -fdefault-*
options, and then the documentation can be removed.
> > % cat cat a.f90
> > program foo
> > real x
> > x = 1. / 3.
> > print *, x
> > end program foo
> > % gfortran6 -static -o z a.f90 && ./z
> > 0.333333343
> > % gfortran6 -static -o z -freal-4-real-16 a.f90 && ./z
> > 0.333333333333333333333333333333333317
>
> Your test case seems to suggest that the latter of the two aforementioned
> options is true. From earlier experiments I believe I remember the opposite,
> though. So either the implementation has changed over time, or I'm just
> misremembering ...
-freal-4-real-16 promotes everything that should have been a REAL(4)
to a REAL(16). -fdefault-real-8 promotes some things that are REAL(4)
to REAL(8), and if available it promotes some things from REAL(8) to
REAL(16). Here's a different program with an implicitly typed REAL(4)
variable, explicitly typed 1._4, 1._8, and implicitly typed 1.
program foo
real x
double precision y
a = 1._4 / 3
x = 1._4 / 3
y = 1._8 / 3
print *, a
print *, x
print *, y
a = 1. / 3
x = 1. / 3
y = 1. / 3
print *, a
print *, x
print *, y
end program foo
Let SP mean 'single precision' and DP mean 'double precision', you
then have
% gfortran6 -static -o z a.f90 && ./z
0.333333343 explicit SP 1. on rhs
0.333333343 explicit SP 1. on rhs
0.33333333333333331 explicit DP 1. on rhs
0.333333343 implicit SP 1. on rhs
0.333333343 implicit SP 1. on rhs
0.33333334326744080 implicit SP 1. on rhs
% gfortran6 -static -o z a.f90 -fdefault-real-8 && ./z
0.33333334326744080 explicit SP 1. retains REAL(4) nature
0.33333334326744080 explicit SP 1. retains REAL(4) nature
0.333333333333333314829616256247390993 REAL(8) promoted to REAL(16)
0.33333333333333331 implicit SP 1. becomes DP 1.
0.33333333333333331 implicit SP 1. becomes DP 1.
0.333333333333333314829616256247390993 implicit SP 1. becomes DP 1.
REAL(8) promoted to REAL(16)
% gfortran6 -static -o z a.f90 -freal-4-real-8 && ./z
0.33333333333333331 Everything promoted from REAL(4) to REAL(8)
0.33333333333333331 Ditto
0.33333333333333331 REAL(8) is not promoted to REAL(16)
0.33333333333333331 Everything promoted from REAL(4) to REAL(8)
0.33333333333333331 Everything promoted from REAL(4) to REAL(8)
0.33333333333333331 REAL(8) is not promoted to REAL(16)
% gfortran6 -static -o z a.f90 -freal-4-real-16 && ./z
0.333333333333333333333333333333333317 All REAL(4) promoted to REAL(16)
0.333333333333333333333333333333333317 Ditto
0.33333333333333331 REAL(8) is not changed by option
0.333333333333333333333333333333333317 All REAL(4) promoted to REAL(16)
0.333333333333333333333333333333333317 Ditto
0.33333333333333331 REAL(8) is not changed by option
>From gcc-bugs-return-574611-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 14:52:59 2017
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From: "matthias.hochsteger at tuwien dot ac.at" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82148] New: ICE in assign_temp, at function.c:968
Date: Fri, 08 Sep 2017 14:52:00 -0000
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Bug ID: 82148
Summary: ICE in assign_temp, at function.c:968
Product: gcc
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Status: UNCONFIRMED
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Assignee: unassigned at gcc dot gnu.org
Reporter: matthias.hochsteger at tuwien dot ac.at
Target Milestone: ---
Created attachment 42141
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42141&action=edit
Preprocessed source file
The code below fails to compile with -std=c++17, but compiles with -std=c++14.
A work-around is to add a constructor to 'Base'.
The code (code.ii is attached):
///////////////////////////////////
#include <initializer_list>
struct Base {
// Working with the follwing line
// ~Base() {}
};
struct Derived : public Base
{
Derived (std::initializer_list<int> list) { }
~Derived() { }
};
void foo(Base a) { }
void bar() {
foo(Derived{0});
}
///////////////////////////////////
The compiler call:
> c++ -v -save-temps -std=c++17 -c code.cpp
Using built-in specs.
COLLECT_GCC=c++
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --disable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
Thread model: posix
gcc version 7.2.0 (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++1z' '-c' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/cc1plus -E -quiet -v -D_GNU_SOURCE
code.cpp -mtune=generic -march=x86-64 -std=c++1z -fpch-preprocess -o code.ii
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/x86_64-pc-linux-gnu
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/backward
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/include
/usr/local/include
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/include-fixed
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++1z' '-c' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/cc1plus -fpreprocessed code.ii -quiet
-dumpbase code.cpp -mtune=generic -march=x86-64 -auxbase code -std=c++1z
-version -o code.s
GNU C++14 (GCC) version 7.2.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.2.0, GMP version 6.1.2, MPFR version
3.1.5-p2, MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++14 (GCC) version 7.2.0 (x86_64-pc-linux-gnu)
compiled by GNU C version 7.2.0, GMP version 6.1.2, MPFR version
3.1.5-p2, MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: f3b185e2b85ecd352b4699fa98d9eb0f
code.cpp: In function ‘void bar()’:
code.cpp:17:8: internal compiler error: in assign_temp, at function.c:968
foo(Derived{0});
~~~^~~~~~~~~~~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.archlinux.org/> for instructions.
------------------------------------------------------------
Thanks,
Matthias
>From gcc-bugs-return-574612-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 14:59:29 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82146] if (&pdo) is always true error
Date: Fri, 08 Sep 2017 14:59:00 -0000
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to MaaSoftware from comment #5)
> Ok.
>
> I am sorry,
> return MyFunc(Num, *(CMaaString *)NULL, doc); // produces GPF in calling
> method not here.
So what? Dereferencing a null pointer has undefined behaviour, so anything can
happen. It could crash immediately, or it could produce unexpected results
elsewhere in the program.
> I have think before what all references are object memory pointers inside
> compiller,
You are wrong.
> just it is more easy working with references of objects not with
> pointers in most ways.
But references can't be null, so if you need something that can be null you
must use a pointer. It's quite simple, please stop wasting our time.
> And no warning generated to *(CMaaString *)NULL code.
> CXXFLAGS = -pipe -W -O3 -fpermissive
Just because there's no warning doesn't mean the code is correct.
>From gcc-bugs-return-574614-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 15:03:59 2017
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From: "matthias.hochsteger at tuwien dot ac.at" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82148] ICE in assign_temp, at function.c:968
Date: Fri, 08 Sep 2017 15:03:00 -0000
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--- Comment #1 from Matthias Hochsteger <matthias.hochsteger at tuwien dot ac.at> ---
Same on latest trunk (git commit 520b78be6e5b448ae4341960acc5706ae561c974):
~/local/gcc7/bin/c++ -v -save-temps -std=c++17 -c code.cpp
Using built-in specs.
COLLECT_GCC=/home/matthias/local/gcc7/bin/c++
Target: x86_64-pc-linux-gnu
Configured with: ../configure --prefix=/home/matthias/local/gcc7
--enable-languages=c,c++ --disable-multilib
Thread model: posix
gcc version 8.0.0 20170908 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++1z' '-c' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/home/matthias/local/gcc7/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/cc1plus -E
-quiet -v -D_GNU_SOURCE code.cpp -mtune=generic -march=x86-64 -std=c++1z
-fpch-preprocess -o code.ii
ignoring nonexistent directory
"/home/matthias/local/gcc7/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/home/matthias/local/gcc7/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../include/c++/8.0.0
/home/matthias/local/gcc7/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../include/c++/8.0.0/x86_64-pc-linux-gnu
/home/matthias/local/gcc7/lib/gcc/x86_64-pc-linux-gnu/8.0.0/../../../../include/c++/8.0.0/backward
/home/matthias/local/gcc7/lib/gcc/x86_64-pc-linux-gnu/8.0.0/include
/usr/local/include
/home/matthias/local/gcc7/include
/home/matthias/local/gcc7/lib/gcc/x86_64-pc-linux-gnu/8.0.0/include-fixed
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-std=c++1z' '-c' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/home/matthias/local/gcc7/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/cc1plus
-fpreprocessed code.ii -quiet -dumpbase code.cpp -mtune=generic -march=x86-64
-auxbase code -std=c++1z -version -o code.s
GNU C++14 (GCC) version 8.0.0 20170908 (experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 8.0.0 20170908 (experimental), GMP version
6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C++14 (GCC) version 8.0.0 20170908 (experimental) (x86_64-pc-linux-gnu)
compiled by GNU C version 8.0.0 20170908 (experimental), GMP version
6.1.0, MPFR version 3.1.4, MPC version 1.0.3, isl version isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 34f3776a4b4b0480fb19303c453a2e50
during RTL pass: expand
code.cpp: In function ‘void bar()’:
code.cpp:17:8: internal compiler error: in assign_temp, at function.c:970
foo(Derived{0});
~~~^~~~~~~~~~~~
0x6cef41 assign_temp(tree_node*, int, int)
../../gcc/function.c:970
0xb80dd3 initialize_argument_information
../../gcc/calls.c:1830
0xb818df expand_call(tree_node*, rtx_def*, int)
../../gcc/calls.c:3279
0xc8ea1d expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../gcc/expr.c:10860
0xb957e0 expand_expr
../../gcc/expr.h:276
0xb957e0 expand_call_stmt
../../gcc/cfgexpand.c:2666
0xb957e0 expand_gimple_stmt_1
../../gcc/cfgexpand.c:3585
0xb957e0 expand_gimple_stmt
../../gcc/cfgexpand.c:3751
0xb96721 expand_gimple_basic_block
../../gcc/cfgexpand.c:5750
0xb9b12e execute
../../gcc/cfgexpand.c:6357
>From gcc-bugs-return-574613-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 15:03:28 2017
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Subject: [Bug c++/82146] if (&pdo) is always true error
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
https://isocpp.org/wiki/faq/references#refs-not-null
>From gcc-bugs-return-574615-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 16:09:30 2017
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Subject: [Bug fortran/82143] add a -fdefault-real-16 flag
Date: Fri, 08 Sep 2017 16:09:00 -0000
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--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> -fdefault-real-8 promotes some things that are REAL(4)
> to REAL(8), and if available it promotes some things from REAL(8) to
> REAL(16).
Not exactly: -fdefault-real-8 promotes some things that are REAL to REAL(8) and
DOUBLE PRECISION to REAL(16). Variables with a KIND (say REAL(4) or REAL(8) are
left unchanged. This is the difference with -freal-4-real-8 which converts all
the REAL* to REAL(8). The interest of -fdefault-real-8 compared to
-freal-4-real-8
is when you use libraries expecting REAL(4) arguments (my use a long time ago
was
with etime).
>From gcc-bugs-return-574616-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 16:12:31 2017
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Subject: [Bug bootstrap/82141] [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Fri, 08 Sep 2017 16:12:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|RESOLVED |REOPENED
Last reconfirmed| |2017-09-08
Resolution|DUPLICATE |---
Ever confirmed|0 |1
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> Only God really knows I presume... You can try the latest iteration:
> https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00045.html
I still get the same error with the above patch. So either the patch does not
work or, as I think, it is not a duplicate.
>From gcc-bugs-return-574617-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 16:28:28 2017
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82141
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC|ebotcazou at gcc dot gnu.org |
--- Comment #5 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> I still get the same error with the above patch. So either the patch does
> not work or, as I think, it is not a duplicate.
<sigh> Of course it's the same issue, namely a Re_Not_Available exception
thrown by Rtsfind and not properly caught during the compilation of
g-exptty.adb...
>From gcc-bugs-return-574618-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 16:35:40 2017
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Subject: [Bug c/82149] New: match.pd: 2919: bad if test ?
Date: Fri, 08 Sep 2017 16:35:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82149
Bug ID: 82149
Summary: match.pd: 2919: bad if test ?
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
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As a result of a build with -Wlogical-op
generic-match.c:1358:77: warning: logical ‘or’ of collectively exhaustive tests
is always true [-Wlogical-op]
Source code is
bool exception_p
= real_isnan (cst) && (cst->signalling
|| (cmp != EQ_EXPR || cmp != NE_EXPR));
Maybe better code
bool exception_p
= real_isnan (cst) && (cst->signalling
|| (cmp != EQ_EXPR && cmp != NE_EXPR));
>From gcc-bugs-return-574619-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 16:42:22 2017
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Subject: [Bug middle-end/82149] match.pd: 2919: bad if test ?
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David Binderman <dcb314 at hotmail dot com> changed:
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----------------------------------------------------------------------------
CC| |ygribov at gcc dot gnu.org
--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
svn blame says this:
250877 ygribov bool exception_p
250877 ygribov = real_isnan (cst) && (cst->signalling
250877 ygribov || (cmp != EQ_EXPR || cmp != NE_EXPR));
Perhaps Yury can offer some advice.
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Subject: [Bug target/81988] [7/8 regression] invalid std instruction with odd register
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--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri Sep 8 17:09:16 2017
New Revision: 251904
URL: https://gcc.gnu.org/viewcvs?rev=251904&root=gcc&view=rev
Log:
PR target/81988
* config/sparc/sparc.md (mulsi3): Rename into *mulsi3_sp32.
(*mulsi3_sp64): New instruction.
(mulsi3): New expander.
Added:
trunk/gcc/testsuite/gcc.dg/pr81988.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/sparc/sparc.md
trunk/gcc/testsuite/ChangeLog
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Subject: [Bug target/81988] [7/8 regression] invalid std instruction with odd register
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--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Fri Sep 8 17:12:15 2017
New Revision: 251905
URL: https://gcc.gnu.org/viewcvs?rev=251905&root=gcc&view=rev
Log:
PR target/81988
* config/sparc/sparc.md (mulsi3): Rename into *mulsi3_sp32.
(*mulsi3_sp64): New instruction.
(mulsi3): New expander.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.dg/pr81988.c
- copied unchanged from r251904, trunk/gcc/testsuite/gcc.dg/pr81988.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/sparc/sparc.md
branches/gcc-7-branch/gcc/testsuite/ChangeLog
>From gcc-bugs-return-574622-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 17:13:37 2017
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Subject: [Bug target/81988] [7/8 regression] invalid std instruction with odd register
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
>From gcc-bugs-return-574623-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 17:14:38 2017
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From: "david.welch at netronome dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82150] New: Produces a branch prefetch which causes a hang
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82150
Bug ID: 82150
Summary: Produces a branch prefetch which causes a hang
Product: gcc
Version: 7.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: david.welch at netronome dot com
Target Milestone: ---
export TARGET=arm-none-eabi
../gcc-$GCCVER/configure --target=$TARGET --prefix=$PREFIX --without-headers
--with-newlib --with-gnu-as --with-gnu-ld --enable-languages='c'
but we first found this on a 4.8.3, dont have a reason to assume it applies to
all versions.
take something like this
unsigned int more_fun ( unsigned int );
unsigned int fun ( void )
{
return(more_fun(0x12344700)+1);
}
arm-none-eabi-gcc -mthumb -march=armv6 -O2 -c so.c -o so.o
00000000 <fun>:
0: b510 push {r4, lr}
2: 4802 ldr r0, [pc, #8] ; (c <fun+0xc>)
4: f7ff fffe bl 0 <more_fun>
8: 3001 adds r0, #1
a: bd10 pop {r4, pc}
c: 12344700 eorsne r4, r4, #0, 14
And there is the problem.
This is not limited to thumb mode
unsigned int more_fun ( unsigned int );
unsigned int fun ( void )
{
return(more_fun(0xe12fff10)+1);
}
00000000 <fun>:
0: e92d4010 push {r4, lr}
4: e59f0008 ldr r0, [pc, #8] ; 14 <fun+0x14>
8: ebfffffe bl 0 <more_fun>
c: e2800001 add r0, r0, #1
10: e8bd8010 pop {r4, pc}
14: e12fff10 bx r0
same problem.
Found on an arm11 mpcore but assume that the older arm11s and possibly even
armv7s have this issue, will see when I get there.
The core does not see pop pc as an unconditional branch it continues to process
the instructions in the pipe while the pop is finishing, it prefetches the
address in r0 in both of the above cases, because the DATA that follows the pop
happens to resemble an instruction, specifically bx but I wonder if other
instructions are a problem as well. The prefetch reads the fetch line at
whatever address that register that happens to be encoded. This can cause a
read of perpherals which are clear on read, or pull a byte out of a uart, or in
our case touch an address that doesnt answer on the axi bus and hang the
processor.
Now because the armv4t didnt support mode switching with a pop using
-march=armv4t produces code that doesnt cause the processor to fail.
00000000 <fun>:
0: b510 push {r4, lr}
2: 4803 ldr r0, [pc, #12] ; (10 <fun+0x10>)
4: f7ff fffe bl 0 <more_fun>
8: 3001 adds r0, #1
a: bc10 pop {r4}
c: bc02 pop {r1}
e: 4708 bx r1
10: 12344700 eorsne r4, r4, #0, 14
I cant possibly be the first person to see this after all of these years
(and although I cant think off hand of another instruction set where the pc is
also treated like a GPR, there are other targets that are affected), so I am
hoping there is already a command line switch other than downgrading wholesale
to armvt. If not can we add a command line switch to avoid this problem? I
would think a branch to self instruction following the pop would work or like
armv4t dont pop into the pc but in arm pop to lr and then bx lr or thumb as you
do in armv4t pop to r0-r3 and bx to that.
>From gcc-bugs-return-574624-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 17:24:59 2017
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82151] New: Autovectorization for insertion is slower than done manually
Date: Fri, 08 Sep 2017 17:24:00 -0000
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Bug ID: 82151
Summary: Autovectorization for insertion is slower than done
manually
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Target: aarch64
Take:
void f(float *restrict a, float * restrict b, float * restrict c, int s)
{
for(int i = 0; i< s;i++)
{
c[i*4] = a[i*2];
c[i*4+1] = a[i*2+1];
c[i*4+2] = b[i*2];
c[i*4+3] = b[i*2+1];
}
}
--- CUT ---
This currently vectorizes using 2xld2 followed by st4. On some (most?)
micro-arch, not vecotrizing is better or vectorizing using 64bit (2xS):
ldr d0, [a, index]
ldr d1, [b, index]
stp d0, d1, [c, index]
is better.
Or even:
ldr d0, [a, index]
ldr d1, [b, index]
ins v0.2d[1], d1
sdr q0, [c, index]
is better than using ld2/st3.
That is just do SLP vectorization and not loop aware SLP here.
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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/82150] Produces a branch prefetch which causes a hang
Date: Fri, 08 Sep 2017 17:31:00 -0000
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This sounds like an errata in the core you are using. There seems like the
best way to fix this is via an option which worksaround this errata if there is
not one already.
>From gcc-bugs-return-574626-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 17:34:01 2017
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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82143] add a -fdefault-real-16 flag
Date: Fri, 08 Sep 2017 17:34:00 -0000
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--- Comment #6 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Fri, Sep 08, 2017 at 04:09:24PM +0000, dominiq at lps dot ens.fr wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82143
>
> --- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> > -fdefault-real-8 promotes some things that are REAL(4)
> > to REAL(8), and if available it promotes some things from REAL(8) to
> > REAL(16).
>
> Not exactly: -fdefault-real-8 promotes some things that are REAL
> to REAL(8) and DOUBLE PRECISION to REAL(16). Variables with a
> KIND (say REAL(4) or REAL(8) are left unchanged.
Which is what I said as in "some things" are promoted. REAL and
REAL(4) are the exact same type unless one use a broken-by-design
compiler option that maps REAL to DOUBLE PRECISION while leaving REAL(4)
unchanged or one has a myoptic view of Fortran's type system.
> This is the difference with -freal-4-real-8 which converts all
> the REAL* to REAL(8). The interest of -fdefault-real-8 compared to
> -freal-4-real-8 is when you use libraries expecting REAL(4)
> arguments (my use a long time ago was with etime).
This, in fact, is a great example of why -fdefault-real-8 should
never be used. The proper method of porting a code/library is to
inspect and write the necessary intrinsic procedures. For this
case, etime is a (nonstandard) specific intrinsic subprogram for
REAL and by extension REAL(4) (unless one uses a broken-by-design
option that maps REAL to DOUBLE PRECISION while leaving REAL(4)
unchanged) and dtime is for DOUBLE PRECISION. etime is not a generic
subprogram. Blindly using -fdefault-real-8 and expecting things
to just work is a sure fire way of shooting oneself in the foot.
One also needs to keep in mind that (old crusty) codes/libraries can
contain code that intermixes REAL, REAL*4, and REAL(4). These
types of libraries sometimes/typically use COMMON and EQUIVALENCE.
-fdefault-real-8 may not (or more likely does not) preserve storage
associate while -freal-4-real-8 does.
>From gcc-bugs-return-574628-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 17:44:30 2017
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Subject: [Bug c++/53215] Warn if orphaned memory is created by ignoring return value of new
Date: Fri, 08 Sep 2017 17:44:00 -0000
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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Is it worth warning? Is this something that people get wrong often? I doubt it.
>From gcc-bugs-return-574627-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 17:44:07 2017
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From: "david.welch at netronome dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82150] Produces a branch prefetch which causes a hang
Date: Fri, 08 Sep 2017 17:44:00 -0000
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--- Comment #2 from david.welch at netronome dot com ---
ARM does not have an errata on this for this core from what I was given. Dont
know why they would, at best it would fall into the "unpredictable results"
category. Errata or not was hoping there could be an option if not one
already. the armv4t one is an option but affects more than just this one thing
I would assume but dont know gcc internals, so to big of a hammer.
>From gcc-bugs-return-574629-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 18:08:15 2017
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Subject: [Bug c++/81852] Feature request: __cpp_threadsafe_static_init
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
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>From gcc-bugs-return-574630-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 18:15:50 2017
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Subject: [Bug debug/68860] [6/7/8 regression] FAIL: gcc.dg/guality/pr36728-1.c -flto -O3 -g line 16/7 arg1 == 1
Date: Fri, 08 Sep 2017 18:15:00 -0000
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--- Comment #19 from Steve Ellcey <sje at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #18)
> Deferring till we have early LTO debug info in.
Is early LTO debug info in now? The comments in ChangeLog make me think
it is. I looked at the gcc6-pr68860-lto.patch file but it does not apply
to the ToT sources. I still see most of the guality tests failing with -flto
on aarch64.
>From gcc-bugs-return-574631-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 20:06:21 2017
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https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00507.html
>From gcc-bugs-return-574632-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 20:16:35 2017
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Subject: [Bug target/81800] [8 regression] on aarch64 ilp32 lrint should not be inlined as two instructions
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>From gcc-bugs-return-574634-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 20:48:51 2017
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Subject: [Bug rtl-optimization/82153] New: missed optimization: double rounding
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Bug ID: 82153
Summary: missed optimization: double rounding
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Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: arjan at linux dot intel.com
Target Milestone: ---
#include <math.h>
int roundme(double A)
{
return floor(A * 4.3);
}
leads to
0000000000000000 <roundme>:
0: f2 0f 59 05 00 00 00 mulsd 0x0(%rip),%xmm0 # 8 <roundme+0x8>
7: 00
8: 66 0f 3a 0b c0 09 roundsd $0x9,%xmm0,%xmm0
e: f2 0f 2c c0 cvttsd2si %xmm0,%eax
12: c3 retq
both roundsd $0x9 and cvttsd2si truncate (floor) their argument, so gcc is
doing redundant work here; roundsd is +/- 8 cycles which is not cheap.
>From gcc-bugs-return-574633-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 20:48:46 2017
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Subject: [Bug debug/82144] [8 Regression] ICE in add_dwarf_attr with alignas
Date: Fri, 08 Sep 2017 20:48:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-08
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Component|c++ |debug
Summary|ice in add_dwarf_attr with |[8 Regression] ICE in
|alignas |add_dwarf_attr with alignas
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r251448.
>From gcc-bugs-return-574635-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 21:09:44 2017
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From: "mateuszb at poczta dot onet.pl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82154] New: ICE in fold_binary_loc, at fold-const.c:9088 in 32-bit mingw32
Date: Fri, 08 Sep 2017 21:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82154
Bug ID: 82154
Summary: ICE in fold_binary_loc, at fold-const.c:9088 in 32-bit
mingw32
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mateuszb at poczta dot onet.pl
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When I compile 32-bit cross compiler GCC 8.0 [r251909] in 64-bit Ubuntu 16.04
for mingw32 there is an error (64-bit GCC 8.0 works OK, problem only with
32-bit):
libtool: compile: /home/ma/m/build/bc_gcc/./gcc/xgcc -shared-libgcc
-B/home/ma/m/build/bc_gcc/./gcc -nostdinc++
-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/src
-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/src/.libs
-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs
-L/home/ma/m/cross/i686-w64-mingw32/lib -L/home/ma/m/cross/mingw/lib -isystem
/home/ma/m/cross/i686-w64-mingw32/include -isystem
/home/ma/m/cross/mingw/include -B/home/ma/m/cross/i686-w64-mingw32/bin/
-B/home/ma/m/cross/i686-w64-mingw32/lib/ -isystem
/home/ma/m/cross/i686-w64-mingw32/include -isystem
/home/ma/m/cross/i686-w64-mingw32/sys-include
-I/home/ma/m/source/gcc-8/libstdc++-v3/../libgcc
-I/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/i686-w64-mingw32
-I/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include
-I/home/ma/m/source/gcc-8/libstdc++-v3/libsupc++ -std=gnu++98
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi
-fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=bitmap_allocator.lo -g -O2 -c
/home/ma/m/source/gcc-8/libstdc++-v3/src/c++98/bitmap_allocator.cc -o
bitmap_allocator.o
during RTL pass: expand
In file included from
/home/ma/m/source/gcc-8/libstdc++-v3/src/c++98/bitmap_allocator.cc:25:0:
/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/ext/bitmap_allocator.h:
In member function 'void
__gnu_cxx::bitmap_allocator<_Tp>::_M_deallocate_single_object(__gnu_cxx::bitmap_allocator<_Tp>::pointer)
[with _Tp = char]':
/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/ext/bitmap_allocator.h:996:7:
internal compiler error: in fold_binary_loc, at fold-const.c:9088
}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
Makefile:565: recipe for target 'bitmap_allocator.lo' failed
make[5]: *** [bitmap_allocator.lo] Error 1
make[5]: Leaving directory
'/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/src/c++98'
Makefile:641: recipe for target 'all-recursive' failed
make[4]: *** [all-recursive] Error 1
make[4]: Leaving directory
'/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/src'
Makefile:510: recipe for target 'all-recursive' failed
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory
'/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3'
Makefile:417: recipe for target 'all' failed
make[2]: *** [all] Error 2
make[2]: Leaving directory
'/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3'
Makefile:10894: recipe for target 'all-target-libstdc++-v3' failed
make[1]: *** [all-target-libstdc++-v3] Error 2
make[1]: Leaving directory '/home/ma/m/build/bc_gcc'
Makefile:903: recipe for target 'all' failed
make: *** [all] Error 2
>From gcc-bugs-return-574637-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 21:10:17 2017
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Subject: [Bug ipa/64139] [4.9/5 Regression] ice in possible_polymorphic_call_targets, at ipa-devirt.c:2410
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jupitercuso4 at gmail dot com
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 82067 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-574636-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 21:10:17 2017
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Subject: [Bug c++/82067] G++ has an internal compiler error in possible_polymorphic_call_targets, at ipa-devirt.c:1557
Date: Fri, 08 Sep 2017 21:10:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Thanks, it's a duplicate, resolved in GCC 5+.
*** This bug has been marked as a duplicate of bug 64139 ***
>From gcc-bugs-return-574638-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 21:51:50 2017
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Subject: [Bug debug/82155] New: gcc-8 ICE in dwarf2out_abstract_function, at dwarf2out.c:21655
Date: Fri, 08 Sep 2017 21:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82155
Bug ID: 82155
Summary: gcc-8 ICE in dwarf2out_abstract_function, at
dwarf2out.c:21655
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
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The crash is extracted from ceph-10.2.9.
[1] is the minimal reproducer (a bit big as I did not clean it after
'creduce'):
Crashes on both gcc-7.2.0 anf gcc-master (x86_64-pc-linux-gnu)
$ LANG=C g++ -O2 -g -c -o ECBackend.o ECBackend.ii
ECBackend.ii: In member function 'virtual void m::m()::n::k(int)':
ECBackend.ii:23:12: internal compiler error: in force_type_die, at
dwarf2out.c:25099
void k(int) {}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.gentoo.org/> for instructions.
// [1] : reproducer
template <typename a> struct b { a c; };
template <typename d> struct e { d *operator->(); };
template <typename d> class h {
public:
typedef e<d> ag;
};
class i {
protected:
i(int);
};
class j {
virtual void k(int) = 0;
public:
int f;
void l() { k(f); }
};
struct m : i {
int cn;
m() : i(cn) {
struct n : j {
n() {}
void k(int) {}
};
}
};
struct o {
o() {
for (h<b<b<j *>>>::ag g;;)
g->c.c->l();
}
};
void fn1() { o(); }
>From gcc-bugs-return-574639-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 21:54:35 2017
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Subject: [Bug debug/82155] gcc-8 ICE in dwarf2out_abstract_function, at dwarf2out.c:21655
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--- Comment #1 from Sergei Trofimovich <slyfox at inbox dot ru> ---
Created attachment 42143
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42143&action=edit
ECBackend.ii
Attaching original reproducer as well.
>From gcc-bugs-return-574640-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 21:57:29 2017
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Fri, 08 Sep 2017 21:57:00 -0000
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--- Comment #47 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
This PR is "fixed" by applying the patch at
https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00045.html
on top of revision r251529. However it does not fix pr82141.
> I posted my darwin.h patch at
> https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00045.html
> on 1 September - hasn’t attracted any notice yet.
May be PING for it.
>From gcc-bugs-return-574641-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 22:01:23 2017
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Subject: [Bug bootstrap/82141] [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Fri, 08 Sep 2017 22:01:00 -0000
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--- Comment #6 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> <sigh> Of course it's the same issue, namely a Re_Not_Available exception
> thrown by Rtsfind and not properly caught during the compilation of
> g-exptty.adb...
The exception handling on darwin is indeed the same as in linux, but does it
mean that all its mishandling leads to duplicate?
IMO if a PR is fixed by a patch, but a related one is not, they cannot be
duplicates.
>From gcc-bugs-return-574642-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 22:24:41 2017
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Subject: [Bug rtl-optimization/82153] missed optimization: double rounding
Date: Fri, 08 Sep 2017 22:24:00 -0000
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--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
floor rounds towards -inf. Conversion to int rounds towards 0. That is,
it wouldn't be valid to omit the roundsd because results would be
different for integer arguments. That said, if you replace floor by
trunc, the optimization should be valid (given the default
-ffp-int-builtin-inexact, anyway, or -fno-trapping-math; as I understand
it, cvttsd2si raises "inexact" for noninteger arguments, whereas with
-fno-fp-int-builtin-inexact, trunc isn't allowed to and neither is a
conversion of an integer floating-point value to an integer type).
>From gcc-bugs-return-574643-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 22:33:42 2017
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Subject: [Bug rtl-optimization/82153] missed optimization: double rounding
Date: Fri, 08 Sep 2017 22:33:00 -0000
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--- Comment #2 from Arjan van de Ven <arjan at linux dot intel.com> ---
When a conversion is inexact, a truncated result is returned. If a converted
result is larger than the maximum signed doubleword integer, the floating-point
invalid exception is raised, and if this exception is masked, the indefinite
integer value (80000000H) is returned.
no exception on truncation...
8: 66 0f 3a 0b c0 0b roundsd $0xb,%xmm0,%xmm0
e: f2 0f 2c c0 cvttsd2si %xmm0,%eax
is what is generated for tunc() (same code otherwise as above)
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Subject: [Bug c++/70029] [8 Regression] ICE with C++11 and -flto
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--- Comment #15 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Sep 8 22:39:17 2017
New Revision: 251911
URL: https://gcc.gnu.org/viewcvs?rev=251911&root=gcc&view=rev
Log:
PR c++/70029 - ICE with ref-qualifier and -flto
gcc/
* langhooks.h (struct lang_hooks_for_types): Add
copy_lang_qualifiers.
* attribs.c (build_type_attribute_qual_variant): Use it.
* langhooks-def.h (LANG_HOOKS_COPY_LANG_QUALIFIERS): Default to
NULL.
(LANG_HOOKS_FOR_TYPES_INITIALIZER): Use it.
* tree.c (verify_type): Re-enable TYPE_CANONICAL main variant check.
gcc/cp/
* tree.c (cxx_copy_lang_qualifiers): New.
* cp-tree.h: Declare it.
* cp-objcp-common.h: Define LANG_HOOKS_COPY_LANG_QUALIFIERS.
Added:
trunk/gcc/testsuite/g++.dg/lto/pr70029_0.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/attribs.c
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-objcp-common.h
trunk/gcc/cp/cp-tree.h
trunk/gcc/cp/tree.c
trunk/gcc/langhooks-def.h
trunk/gcc/langhooks.h
trunk/gcc/tree.c
>From gcc-bugs-return-574645-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 23:08:18 2017
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/82153] missed optimization: double rounding
Date: Fri, 08 Sep 2017 23:08:00 -0000
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--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
On Fri, 8 Sep 2017, arjan at linux dot intel.com wrote:
> When a conversion is inexact, a truncated result is returned. If a converted
> result is larger than the maximum signed doubleword integer, the floating-point
> invalid exception is raised, and if this exception is masked, the indefinite
> integer value (80000000H) is returned.
What manual is that from?
I'm looking at the "Intel® 64 and IA-32 Architectures Software Developer’s
Manual Combined Volumes: 1, 2A, 2B, 2C, 2D, 3A, 3B, 3C, 3D and 4" (Order
Number: 325462-063US, July 2017). Which clearly has problems here because
it has the "When a conversion is inexact, the value returned is rounded
according to the rounding control bits in the MXCSR register." text for
CVTTSD2SI (page 848 of the PDF) despite the description as "Convert with
Truncation Scalar Double-Precision Floating-Point Value to Signed
Integer". But under "SIMD Floating-Point Exceptions" it lists "Invalid,
Precision". And in my experiment, CVTTSD2SI does indeed generate
"inexact" for a conversion from non-integer floating point to integer.
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82141] [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Fri, 08 Sep 2017 23:28:00 -0000
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--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
r251754 is also OK. Most of the changes between r251754 and r251817 come from
Ada.
>From gcc-bugs-return-574647-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Sep 08 23:42:52 2017
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From: "ldionne.2 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/82156] New: [7/8 regression] Atomic is_lock_free is not true for 16 byte type
Date: Fri, 08 Sep 2017 23:42:00 -0000
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Bug ID: 82156
Summary: [7/8 regression] Atomic is_lock_free is not true for
16 byte type
Product: gcc
Version: 7.1.0
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The following code prints true on GCC 4.x, 5.x and 6.x, but not on GCC 7.x and
trunk:
#include <atomic>
#include <iostream>
#include <type_traits>
using T = std::aligned_storage_t<16>; // just a 16 bytes type
std::atomic<T> atomic;
int main() {
std::cout << std::boolalpha << atomic.is_lock_free() << std::endl;
std::cout << std::boolalpha << std::atomic<T>::is_always_lock_free <<
std::endl;
}
I'd like to know whether this is a regression, or me misunderstanding the
meaning of `is_lock_free()`.
Live examples:
GCC 4.9 (true): https://wandbox.org/permlink/gg0HoiAofJXXxHzh
GCC 5 (true): https://wandbox.org/permlink/vofEUemsQSpIROOR
GCC 6 (true): https://wandbox.org/permlink/jH8spWex3KDKVT0a
GCC 7 (false): https://wandbox.org/permlink/M1SG1B6StNtBjlxH
GCC 8 (false): https://wandbox.org/permlink/4vmBcSph2Pvy4tye
Thanks!
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From: "peter at cordes dot ca" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/67458] x86: atomic store with memory_order_release doesn't order other stores
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--- Comment #5 from Peter Cordes <peter at cordes dot ca> ---
> optabs: ensure atomic_load/stores have compiler barriers
Thanks for taking a look at this report. But I think it's not necessary to
have a full 2-way barrier. If there's a lighter-weight way to get the
behaviour we want, that would be better.
(In reply to Peter Cordes from comment #0)
> void set(void) {
> b = 2;
> a.store(1, memory_order_release);
> b = 3;
> }
Looking at this again with a couple years more understanding of atomics,
probably gcc could optimize to
b = 3;
a.store();
because a release-store is only a *1-way barrier*. (Unlike
atomic_signal_fence() or atomic_thread_fence().
http://preshing.com/20131125/acquire-and-release-fences-dont-work-the-way-youd-expect/).
I think even the original behaviour (a.store(); b=3;) might actually have been
technically legal C++11, because you couldn't observe the reordering without
invoking UB.
A thread that does an a.load(mo_acquire) will still cause C++11 UB if it reads
b, because b isn't atomic but there's a data race because it was written after
the release operation that we synchronize-with.
Thus, no other thread is allowed to look at b any time after this thread ran
set(), until another synchronizes-with.
>From gcc-bugs-return-574649-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 01:37:16 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82157] New: ICE on valid code at -O2 and -O3: cannot update SSA form
Date: Sat, 09 Sep 2017 01:37:00 -0000
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Bug ID: 82157
Summary: ICE on valid code at -O2 and -O3: cannot update SSA
form
Product: gcc
Version: unknown
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$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170908 (experimental) [trunk revision 251906] (GCC)
$
$ gcctk -Os small.c; ./a.out
$ gcc-7.2.0 -O2 small.c; ./a.out
$
$ gcctk -O2 small.c
small.c: In function ‘ac’:
small.c:20:6: error: statement uses released SSA name:
void ac ()
^~
# .MEM_25 = VDEF <.MEM_16>
j = 0;
The use of .MEM_16 should have been replaced
during GIMPLE pass: pre
small.c:20:6: internal compiler error: cannot update SSA form
0xd084e6 update_ssa(unsigned int)
../../gcc-source-trunk/gcc/tree-into-ssa.c:3301
0xe31579 execute
../../gcc-source-trunk/gcc/tree-ssa-pre.c:5108
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.
$
---------------------------------------------
int a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y,
z;
int aa ()
{
w = f < 0 || e >> f;
while (z)
h = i && (r && p) | ((l = p) == c % d);
k = v + 1 < a;
t = -(j < 1) * q;
return u;
}
int ab ()
{
for (j = 0; 1; j = 5)
if (!s)
return d;
}
void ac ()
{
char ad = aa ();
ab ();
if (x)
{
for (m = 0; m < 3; m = a)
{
y = a && b;
if (g)
break;
}
n = j;
}
o = j & ad;
}
int main ()
{
ac ();
return 0;
}
>From gcc-bugs-return-574650-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 03:25:27 2017
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From: "peter at cordes dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/71660] [5/6/7/8 regression] alignment of std::atomic<8 byte primitive type> (long long, double) is wrong on x86
Date: Sat, 09 Sep 2017 03:25:00 -0000
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--- Comment #13 from Peter Cordes <peter at cordes dot ca> ---
(In reply to Thiago Macieira from comment #12)
> Another problem is that we've now had a couple of years with this issue, so
> it's probably worse to make a change again.
A change to C++11 std::atomic? Yeah, we definitely should not change it. It's
using by far the most efficient solution for code that does any pure-store or
pure-load operations, and any change would break that.
It's also compatible with clang (at least as far as struct layout and how
whether or not 64-bit atomic objects are lock-free).
Also, it's interoperable with 64-bit std::atomic for shared-memory segments, if
you avoid struct layout differences for non-atomic 64-bit struct members.
If you want a struct with non-atomic members to match the layout of a struct
with atomic members, do something like
struct foo {
char c;
alignas(atomic<long long>) long long t;
};
And usually sort your struct members largest-first to reduce padding in the
first place.
Maybe there's some other case that makes it convenient for minimum alignment
(C11 _Alignof) atomic types to match _Alignof non-atomic types? Note that
gcc's implementation of C++11/14 alignof doesn't match it's C11 _Alignof
behaviour. g++ alignof gives you the "recommended" alignment, like
__alignof__, rather than the minimum where you will ever find a value of this
type. See https://gcc.gnu.org/ml/gcc-patches/2013-12/msg00435.html and bug
52023 for the reasons behind changing C11 _Alignof but not C++14 alignof. (On
reading the standard, I'm not sure I agree; I think C++14 should be returning
4 for alignof(long long) with -m32 in the SysV ABI.)
IDK what Qt's assert is guarding against. If you're specifically worried about
atomicity, checking that alignof(InStruct) == sizeof(long long) makes more
sense, because that's required on almost any architecture as a guaranteed way
to avoid cache-line splits. (C/C++ don't have a simple way to express
"unaligned is fine except at cache line boundaries" like you get on Intel
specifically (not AMD)).
>From gcc-bugs-return-574651-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 06:24:33 2017
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From: "peter at cordes dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82158] New: _Noreturn functions that do return clobber caller's registers on ARM32 (but not other arches)
Date: Sat, 09 Sep 2017 06:24:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82158
Bug ID: 82158
Summary: _Noreturn functions that do return clobber caller's
registers on ARM32 (but not other arches)
Product: gcc
Version: 7.1.0
URL: https://godbolt.org/g/GhW4b8
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
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Assignee: unassigned at gcc dot gnu.org
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Target: arm*-*-*
ARM32 clobbers a call-preserved register in a function which does actually
return. (It was declared _Noreturn, but gcc chooses to make a function which
returns instead of crashing).
Not sure if this is a feature or bug (came up in
https://stackoverflow.com/a/45982153/224132). Probably a bug, since saving
registers in a noreturn function is potentially useful for backtraces (and gcc
avoids tailcall with noreturn for that reason), even if exceptions are disabled
so stack-unwinding doesn't need them. And this is only happening on ARM32, not
the others I looked at: ARM64, MIPS, MIPS64, PowerPC64, MSP430, x86 -m32, or
x86 -m64. (But ARM's multi-operand-at-once POP is probably handled specially,
so that could explain the difference...)
Anyway, in a function declared noreturn which actually *does* return, ARM32
still does the optimization of clobbering "call-preserved" even though it also
generates code to return instead of just falling off the end of the function.
This is C undefined behaviour so it's legal, but is this desirable? gcc warns
about it (even without -Wall), but it's so likely to cause hard-to-debug
problems that I'd suggest erroring by default, or not doing the optimization.
// https://godbolt.org/g/GhW4b8 for gcc6.3, also tested locally with gcc7.1
void ext(void);
ATTRIBUTE
void foo(int *p, int y) {
ext();
*p = y; // then use args that had to survive a call
}
On ARM32 with gcc7.1 -O3 -DATTRIBUTE=_Noreturn produces this:
7 : <source>:7:1: warning: 'noreturn' function does return
foo:
@ Function supports interworking.
@ Volatile: function does not return. # This line not present
without _Noreturn
@ args = 0, pretend = 0, frame = 0
@ frame_needed = 0, uses_anonymous_args = 0
push {r4, lr}
mov r5, r1
mov r4, r0
bl ext
str r5, [r4]
pop {r4, lr}
bx lr
With ATTRIBUTE= (empty), we get push/pop {r4, r5, r6, lr} and things are
otherwise the same. See https://godbolt.org/g/hYnrrD for a diff.
>From gcc-bugs-return-574652-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 06:27:56 2017
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Subject: [Bug target/82158] _Noreturn functions that do return clobber caller's registers on ARM32 (but not other arches)
Date: Sat, 09 Sep 2017 06:27:00 -0000
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--- Comment #1 from Peter Cordes <peter at cordes dot ca> ---
Related: bug 55747 describes why gcc keeps the `push {r4, lr}` in the _Noreturn
function: backtraces.
>From gcc-bugs-return-574653-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 09:08:34 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82141] [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Sat, 09 Sep 2017 09:08:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ebotcazou at gcc dot gnu.org
--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> The exception handling on darwin is indeed the same as in linux, but does it
> mean that all its mishandling leads to duplicate?
The issue is what I described in my previous comment. Into how many sub-issues
it must be split in order to be fully addressed is IMO rather uninteresting.
>From gcc-bugs-return-574654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 09:43:20 2017
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Subject: [Bug bootstrap/81926] [7 regression] go/parse.o differs between stage2 and stage3
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--- Comment #31 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Sat Sep 9 09:42:39 2017
New Revision: 251922
URL: https://gcc.gnu.org/viewcvs?rev=251922&root=gcc&view=rev
Log:
PR bootstrap/81926
* cp-objcp-common.c (struct debug_type_hasher): New class.
(debug_type_hash): New variable.
(cp_get_debug_type): Associate the OFFSET_TYPEs with the types.
Modified:
trunk/gcc/cp/ChangeLog
trunk/gcc/cp/cp-objcp-common.c
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Subject: [Bug bootstrap/81926] [7 regression] go/parse.o differs between stage2 and stage3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81926
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #33 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
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Subject: [Bug bootstrap/81926] [7 regression] go/parse.o differs between stage2 and stage3
Date: Sat, 09 Sep 2017 09:44:00 -0000
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--- Comment #32 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Sat Sep 9 09:43:33 2017
New Revision: 251923
URL: https://gcc.gnu.org/viewcvs?rev=251923&root=gcc&view=rev
Log:
PR bootstrap/81926
* cp-objcp-common.c (struct debug_type_hasher): New class.
(debug_type_hash): New variable.
(cp_get_debug_type): Associate the OFFSET_TYPEs with the types.
Modified:
branches/gcc-7-branch/gcc/cp/ChangeLog
branches/gcc-7-branch/gcc/cp/cp-objcp-common.c
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Subject: [Bug tree-optimization/82157] [8 Regression] ICE on valid code at -O2 and -O3: cannot update SSA form
Date: Sat, 09 Sep 2017 11:05:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-09
CC| |jakub at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|ICE on valid code at -O2 |[8 Regression] ICE on valid
|and -O3: cannot update SSA |code at -O2 and -O3: cannot
|form |update SSA form
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r251798.
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Subject: [Bug fortran/45170] [F2003] allocatable character lengths
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janus at gcc dot gnu.org changed:
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----------------------------------------------------------------------------
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>From gcc-bugs-return-574659-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 13:20:55 2017
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From: "jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/70029] [8 Regression] ICE with C++11 and -flto
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Jason Merrill <jason at gcc dot gnu.org> changed:
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--- Comment #16 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-574660-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 13:33:33 2017
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From: "heinzisoft at web dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82159] New: ICE: in assign_temp, at function.c:961
Date: Sat, 09 Sep 2017 13:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82159
Bug ID: 82159
Summary: ICE: in assign_temp, at function.c:961
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: heinzisoft at web dot de
Target Milestone: ---
Seeing the following error on GCC 6.3.0 and GCC 7.2.0, while it builds fine on
GCC 5 and on current Clang. OS is Ubuntu 17.10.
Steps to Repro:
-----------------
$ g++ test.cpp
test.cpp: In function ‘int main()’:
test.cpp:17:35: internal compiler error: in assign_temp, at function.c:961
MyClass<0> taken = data.func<0>();
^
Please submit a full bug report,
with preprocessed source if appropriate.
Source file test.cpp:
-------------
#include <cstring>
template<size_t SIZE>
struct MyClass {
public:
~MyClass() {}
template<size_t size> MyClass<size> func() {
return MyClass<size>();
}
unsigned char data[SIZE];
};
int main() {
MyClass<16> data;
MyClass<0> taken = data.func<0>();
}
>From gcc-bugs-return-574661-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 13:43:16 2017
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Subject: [Bug bootstrap/82160] New: [8 Regression] Mysterious testsuite failures
Date: Sat, 09 Sep 2017 13:43:00 -0000
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Bug ID: 82160
Summary: [8 Regression] Mysterious testsuite failures
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Target Milestone: ---
On x86-64, bootstrap with -O3, r251917 gave
FAIL: ext/special_functions/hyperg/check_nan.cc (test for excess errors)
FAIL: ext/special_functions/hyperg/check_value.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/char/12048-3.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/char/12048-4.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/char/35209.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/12948-1.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/12948-2.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/12948-3.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/12948-4.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/1.cc (test for excess errors)
FAIL: ext/stdio_sync_filebuf/wchar_t/35209.cc (test for excess errors)
FAIL: ext/throw_allocator/check_allocate_max_size.cc (test for excess errors)
FAIL: ext/throw_allocator/check_deallocate_null.cc (test for excess errors)
FAIL: ext/throw_allocator/check_delete.cc (test for excess errors)
FAIL: ext/throw_allocator/check_new.cc (test for excess errors)
FAIL: ext/throw_allocator/deallocate_global.cc (test for excess errors)
FAIL: ext/throw_allocator/deallocate_local.cc (test for excess errors)
FAIL: gcc.target/i386/mpx/return-struct-6-ubv.c -O1 (test for excess errors)
FAIL: gcc.target/i386/mpx/return-struct-6-ubv.c -O2 (test for excess errors)
FAIL: gcc.target/i386/mpx/return-struct-6-ubv.c -O3 -g (test for excess
errors)
There were no compiler error messages. GCC simply returns -1.
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From: "thiago at kde dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/71660] [5/6/7/8 regression] alignment of std::atomic<8 byte primitive type> (long long, double) is wrong on x86
Date: Sat, 09 Sep 2017 13:47:00 -0000
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--- Comment #14 from Thiago Macieira <thiago at kde dot org> ---
(In reply to Peter Cordes from comment #13)
> If you want a struct with non-atomic members to match the layout of a struct
> with atomic members, do something like
>
> struct foo {
> char c;
> alignas(atomic<long long>) long long t;
> };
>
[cut]
> IDK what Qt's assert is guarding against. If you're specifically worried
> about atomicity, checking that alignof(InStruct) == sizeof(long long) makes
> more sense, because that's required on almost any architecture as a
> guaranteed way to avoid cache-line splits. (C/C++ don't have a simple way
> to express "unaligned is fine except at cache line boundaries" like you get
> on Intel specifically (not AMD)).
It was trying to guard against exactly what you said above: that the alignment
of a QAtomicInteger<T> was exactly the same as the alignment of a plain T
inside a struct, so one could replace a previous plain member with an atomic
and keep binary compatibility.
But it's clear now that atomic types may need extra alignment than the plain
types. In hindsight, the check is unnecessary and should be removed; people
should not expect to replace T with std::atomic<T> or QAtomicInteger<T> and
keep ABI.
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Subject: [Bug c++/82159] ICE: in assign_temp, at function.c:961
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--- Comment #1 from heinzisoft at web dot de ---
Correction: OS is Ubuntu 17.04, not 17.10
>From gcc-bugs-return-574664-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 14:33:02 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/81852] Feature request: __cpp_threadsafe_static_init
Date: Sat, 09 Sep 2017 14:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81852
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Sat Sep 9 14:32:25 2017
New Revision: 251939
URL: https://gcc.gnu.org/viewcvs?rev=251939&root=gcc&view=rev
Log:
PR c++/81852 define feature-test macro for -fthreadsafe-statics
gcc/c-family:
PR c++/81852
* c-cppbuiltin.c (c_cpp_builtins): Define __cpp_threadsafe_static_init.
gcc/testsuite:
PR c++/81852
* g++.dg/cpp1y/feat-cxx11.C: Check __cpp_threadsafe_static_init.
* g++.dg/cpp1y/feat-cxx14.C: Likewise.
* g++.dg/cpp1y/feat-cxx98.C: Likewise.
* g++.dg/cpp1y/feat-neg.C: Likewise.
* g++.dg/cpp1z/feat-cxx1z.C: Likewise.
Modified:
trunk/gcc/c-family/ChangeLog
trunk/gcc/c-family/c-cppbuiltin.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/cpp1y/feat-cxx11.C
trunk/gcc/testsuite/g++.dg/cpp1y/feat-cxx14.C
trunk/gcc/testsuite/g++.dg/cpp1y/feat-cxx98.C
trunk/gcc/testsuite/g++.dg/cpp1y/feat-neg.C
trunk/gcc/testsuite/g++.dg/cpp1z/feat-cxx1z.C
>From gcc-bugs-return-574665-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 14:48:35 2017
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From: "daniel.kruegler at googlemail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/81852] Feature request: __cpp_threadsafe_static_init
Date: Sat, 09 Sep 2017 14:48:00 -0000
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--- Comment #3 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
(In reply to Jonathan Wakely from comment #2)
> trunk/gcc/testsuite/g++.dg/cpp1y/feat-neg.C
Thanks for your work on that Jonathan! Just out of curiosity: All tests within
feat-neg.C seem counter-intuitive to me, because it seems that the idea of that
test is that everything within is supposed to fail on success - is that
intended?
>From gcc-bugs-return-574666-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 15:12:42 2017
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Subject: [Bug middle-end/82149] match.pd: 2919: bad if test ?
Date: Sat, 09 Sep 2017 15:12:00 -0000
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Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-09
CC| |manu at gcc dot gnu.org
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--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Seems legit. The fact that this doesn't trigger some failure in the testsuite
shows that there is no test testing this code.
>From gcc-bugs-return-574667-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 15:42:49 2017
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Subject: [Bug middle-end/82145] [8 regression] i386/pr38988.c, i386/pr46254.c, i386/pr55154.c, i386/pr81766.c fails
Date: Sat, 09 Sep 2017 15:42:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Untested fix (to be tested and finalized after the weekend):
--- gcc/config/i386/i386.c.jj 2017-09-08 09:13:59.000000000 +0200
+++ gcc/config/i386/i386.c 2017-09-09 17:35:22.365269397 +0200
@@ -8885,7 +8885,7 @@ ix86_use_pseudo_pic_reg (void)
/* Initialize large model PIC register. */
-static rtx_code_label *
+static void
ix86_init_large_pic_reg (unsigned int tmp_regno)
{
rtx_code_label *label;
@@ -8902,7 +8902,10 @@ ix86_init_large_pic_reg (unsigned int tm
emit_insn (gen_set_got_offset_rex64 (tmp_reg, label));
emit_insn (ix86_gen_add3 (pic_offset_table_rtx,
pic_offset_table_rtx, tmp_reg));
- return label;
+ const char *name = LABEL_NAME (label);
+ PUT_CODE (label, NOTE);
+ NOTE_KIND (label) = NOTE_INSN_DELETED_LABEL;
+ NOTE_DELETED_LABEL_NAME (label) = name;
}
/* Create and initialize PIC register if required. */
@@ -8911,7 +8914,6 @@ ix86_init_pic_reg (void)
{
edge entry_edge;
rtx_insn *seq;
- rtx_code_label *label = NULL;
if (!ix86_use_pseudo_pic_reg ())
return;
@@ -8921,7 +8923,7 @@ ix86_init_pic_reg (void)
if (TARGET_64BIT)
{
if (ix86_cmodel == CM_LARGE_PIC)
- label = ix86_init_large_pic_reg (R11_REG);
+ ix86_init_large_pic_reg (R11_REG);
else
emit_insn (gen_set_got_rex64 (pic_offset_table_rtx));
}
@@ -8945,22 +8947,6 @@ ix86_init_pic_reg (void)
entry_edge = single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun));
insert_insn_on_edge (seq, entry_edge);
commit_one_edge_insertion (entry_edge);
-
- if (label)
- {
- basic_block bb = BLOCK_FOR_INSN (label);
- rtx_insn *bb_note = PREV_INSN (label);
- /* If the note preceding the label starts a basic block, and the
- label is a member of the same basic block, interchange the two. */
- if (bb_note != NULL_RTX
- && NOTE_INSN_BASIC_BLOCK_P (bb_note)
- && bb != NULL
- && bb == BLOCK_FOR_INSN (bb_note))
- {
- reorder_insns_nobb (bb_note, bb_note, label);
- BB_HEAD (bb) = label;
- }
- }
}
/* Initialize a variable CUM of type CUMULATIVE_ARGS
--- gcc/postreload.c.jj 2017-09-08 09:13:54.000000000 +0200
+++ gcc/postreload.c 2017-09-09 17:31:37.360493204 +0200
@@ -409,9 +409,12 @@ reload_cse_simplify_operands (rtx_insn *
CLEAR_HARD_REG_SET (equiv_regs[i]);
/* cselib blows up on CODE_LABELs. Trying to fix that doesn't seem
- right, so avoid the problem here. Likewise if we have a constant
- and the insn pattern doesn't tell us the mode we need. */
+ right, so avoid the problem here. Similarly NOTE_INSN_DELETED_LABEL.
+ Likewise if we have a constant and the insn pattern doesn't tell us
+ the mode we need. */
if (LABEL_P (recog_data.operand[i])
+ || (NOTE_P (recog_data.operand[i])
+ && NOTE_KIND (recog_data.operand[i]) == NOTE_INSN_DELETED_LABEL)
|| (CONSTANT_P (recog_data.operand[i])
&& recog_data.operand_mode[i] == VOIDmode))
continue;
>From gcc-bugs-return-574668-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 15:45:00 2017
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From: "pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82161] New: Failure of a complicated initialization expression
Date: Sat, 09 Sep 2017 15:45:00 -0000
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Bug ID: 82161
Summary: Failure of a complicated initialization expression
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: pault at gcc dot gnu.org
Target Milestone: ---
As reported on
https://groups.google.com/forum/#!topic/comp.lang.fortran/yqT4TInGjC0 by James
Van Buskirk:
program data_var2
implicit none
integer, parameter :: IMAX = 2, JMAX = 3, NMAX = 4
type mydata
real var(NMAX)
end type mydata
integer i, j, n
type(mydata), parameter :: data(IMAX, JMAX) = reshape( &
[((mydata([(1.0e2*i+1.0e1*j+1.0e0*n,n=1,NMAX)]), &
i=1,IMAX),j=1,JMAX)], [IMAX,JMAX])
end program data_var2
produces
[pault@pc30 pdt]$ ~/irun/bin/gfortran -static-libgfortran init.f90
-fdump-tree-original -g
init.f90:9:25:
[((mydata([(1.0e2*i+1.0e1*j+1.0e0*n,n=1,NMAX)]), &
1
Error: Parameter ‘i’ at (1) has not been declared or is a variable, which does
not reduce to a constant expression
* On the other hand, this compiles fine:
program data_var2
implicit none
integer, parameter :: IMAX = 2, JMAX = 3, NMAX = 4
type mydata
real var(NMAX)
end type mydata
integer i, j, n
type(mydata), parameter :: data(IMAX, JMAX) = reshape( &
[((mydata([(1.0e0*n,n=1,NMAX)]), &
i=1,IMAX),j=1,JMAX)], [IMAX,JMAX])
end program data_var2
In the original testcase, simplification is obviously thrown by having to deal
with both the array constructor, which appears as an argument of the derived
type constructor, and the outer array constructor. In particular, 'i' and 'j'
are not being recognised as parameters.
Regards
Paul
>From gcc-bugs-return-574669-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 15:45:39 2017
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Subject: [Bug fortran/82161] Failure of a complicated initialization expression
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-09
Ever confirmed|0 |1
>From gcc-bugs-return-574670-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 16:12:09 2017
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Subject: [Bug c/82162] New: Internal compiler error in Raspbian
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Bug ID: 82162
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Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gogol.logog at hotmail dot it
Target Milestone: ---
Created attachment 42144
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42144&action=edit
Precompiled source
Compiling on Raspbain Jessie (Raspberry Pi 2) fails with "internal compiler
error: Segmentation fault". On a Debian 32bit works just fine, and also on Kali
64bit.
gcc -v -save-temps all-your-options source-file:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/4.9/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Raspbian 4.9.2-10'
--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-libitm
--disable-libquadmath --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-armhf/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-armhf
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-armhf
--with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --disable-sjlj-exceptions --with-arch=armv6
--with-fpu=vfp --with-float=hard --enable-checking=release
--build=arm-linux-gnueabihf --host=arm-linux-gnueabihf
--target=arm-linux-gnueabihf
Thread model: posix
gcc version 4.9.2 (Raspbian 4.9.2-10)
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-march=armv6' '-mfloat-abi=hard'
'-mfpu=vfp' '-mtls-dialect=gnu'
/usr/lib/gcc/arm-linux-gnueabihf/4.9/cc1 -E -quiet -v -imultilib . -imultiarch
arm-linux-gnueabihf input_matrix.c -march=armv6 -mfloat-abi=hard -mfpu=vfp
-mtls-dialect=gnu -fpch-preprocess -o input_matrix.i
ignoring nonexistent directory "/usr/local/include/arm-linux-gnueabihf"
ignoring nonexistent directory
"/usr/lib/gcc/arm-linux-gnueabihf/4.9/../../../../arm-linux-gnueabihf/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/arm-linux-gnueabihf/4.9/include
/usr/local/include
/usr/lib/gcc/arm-linux-gnueabihf/4.9/include-fixed
/usr/include/arm-linux-gnueabihf
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-march=armv6' '-mfloat-abi=hard'
'-mfpu=vfp' '-mtls-dialect=gnu'
/usr/lib/gcc/arm-linux-gnueabihf/4.9/cc1 -fpreprocessed input_matrix.i -quiet
-dumpbase input_matrix.c -march=armv6 -mfloat-abi=hard -mfpu=vfp
-mtls-dialect=gnu -auxbase input_matrix -version -o input_matrix.s
GNU C (Raspbian 4.9.2-10) version 4.9.2 (arm-linux-gnueabihf)
compiled by GNU C version 4.9.2, GMP version 6.0.0, MPFR version
3.1.2-p3, MPC version 1.0.2
GGC heuristics: --param ggc-min-expand=96 --param ggc-min-heapsize=124279
GNU C (Raspbian 4.9.2-10) version 4.9.2 (arm-linux-gnueabihf)
compiled by GNU C version 4.9.2, GMP version 6.0.0, MPFR version
3.1.2-p3, MPC version 1.0.2
GGC heuristics: --param ggc-min-expand=96 --param ggc-min-heapsize=124279
Compiler executable checksum: 91c450f0e3805f97e63eb93bcfb4f682
In file included from useful.h:3:0,
from input_matrix.c:4:
useful.c: In function ‘chunked_fgets’:
useful.c:7:8: internal compiler error: Segmentation fault
char** chunked_fgets(FILE *istream, char** buf) {
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.9/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccGPgdZs.out file, please attach this to
your bugreport.
>From gcc-bugs-return-574671-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 17:43:46 2017
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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82163] New: ICE on valid code at -O3 on x86_64-linux-gnu: in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:707
Date: Sat, 09 Sep 2017 17:43:00 -0000
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Message-ID: <bug-82163-4@http.gcc.gnu.org/bugzilla/>
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82163
Bug ID: 82163
Summary: ICE on valid code at -O3 on x86_64-linux-gnu: in
check_loop_closed_ssa_use, at
tree-ssa-loop-manip.c:707
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: su at cs dot ucdavis.edu
Target Milestone: ---
It seems to be a recent regression from 7.2.*.
$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170909 (experimental) [trunk revision 251923] (GCC)
$
$ gcctk -O2 small.c; ./a.out
$ gcc-7.2.0 -O3 small.c; ./a.out
$
$ gcctk -O3 small.c
during GIMPLE pass: pcom
small.c: In function ‘h’:
small.c:3:6: internal compiler error: in check_loop_closed_ssa_use, at
tree-ssa-loop-manip.c:707
void h ()
^
0xdeba2d check_loop_closed_ssa_use
../../gcc-source-trunk/gcc/tree-ssa-loop-manip.c:706
0xdeea1d check_loop_closed_ssa_stmt
../../gcc-source-trunk/gcc/tree-ssa-loop-manip.c:722
0xdeea1d verify_loop_closed_ssa(bool)
../../gcc-source-trunk/gcc/tree-ssa-loop-manip.c:756
0xdf076b checking_verify_loop_closed_ssa
../../gcc-source-trunk/gcc/tree-ssa-loop-manip.h:37
0xdf076b tree_transform_and_unroll_loop(loop*, unsigned int, edge_def*,
tree_niter_desc*, void (*)(loop*, void*), void*)
../../gcc-source-trunk/gcc/tree-ssa-loop-manip.c:1408
0xd47d8a tree_predictive_commoning_loop
../../gcc-source-trunk/gcc/tree-predcom.c:3139
0xd47d8a tree_predictive_commoning()
../../gcc-source-trunk/gcc/tree-predcom.c:3172
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.
$
---------------------------------------
int a, b, c[4], d, e, f, g;
void h ()
{
for (; a; a++)
{
c[a + 3] = g;
if (b)
c[a] = f;
else
{
for (; d; d++)
c[d + 3] = c[d];
for (e = 1; e == 2; e++)
;
if (e)
break;
}
}
}
int main ()
{
h ();
return 0;
}
>From gcc-bugs-return-574672-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 20:47:42 2017
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From: "jan.kratochvil at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/65132] diagnostics: missing: bitfield member cannot have an in-class initializer
Date: Sat, 09 Sep 2017 20:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65132
Jan Kratochvil <jan.kratochvil at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|5.0 |7.1.1
--- Comment #3 from Jan Kratochvil <jan.kratochvil at redhat dot com> ---
gcc-7.1.1-3.fc26.x86_64
1.C:1:20: error: lvalue required as left operand of assignment
Still not useful.
>From gcc-bugs-return-574673-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 20:50:31 2017
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From: "jan.kratochvil at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/65188] improve error for member operator applied to non-class type
Date: Sat, 09 Sep 2017 20:50:00 -0000
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Jan Kratochvil <jan.kratochvil at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |WORKSFORME
--- Comment #3 from Jan Kratochvil <jan.kratochvil at redhat dot com> ---
gcc-7.1.1-3.fc26.x86_64
1.C:2:23: error: invalid use of member function ‘void C::f()’ (did you forget
the ‘()’ ?)
It looks as fixed now.
>From gcc-bugs-return-574674-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 20:52:50 2017
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From: "jan.kratochvil at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/61940] Wrong error location for error in initialization list
Date: Sat, 09 Sep 2017 20:52:00 -0000
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--- Comment #8 from Jan Kratochvil <jan.kratochvil at redhat dot com> ---
Still valid for: gcc-7.1.1-3.fc26.x86_64
>From gcc-bugs-return-574675-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 21:04:28 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/81852] Feature request: __cpp_threadsafe_static_init
Date: Sat, 09 Sep 2017 21:04:00 -0000
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--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes. The dg-options directive disables the features, then the dg-error
directives check for the expected #error diagnostics.
This uses DejaGnu to check for the three specific expected results, rather than
just expecting compilation to pass/fail, which would only be a binary result.
>From gcc-bugs-return-574676-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 21:25:54 2017
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From: "erik.rainey at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/61414] enum class bitfield size-checking failure
Date: Sat, 09 Sep 2017 21:25:00 -0000
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Erik Rainey <erik.rainey at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |erik.rainey at gmail dot com
--- Comment #11 from Erik Rainey <erik.rainey at gmail dot com> ---
Present in 5.4 through 7.2 at least.
>From gcc-bugs-return-574677-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 22:50:27 2017
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From: "chrisj at rtems dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/66032] RTEMS MIPS build fails on FreeBSD
Date: Sat, 09 Sep 2017 22:50:00 -0000
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--- Comment #7 from Chris Johns <chrisj at rtems dot org> ---
Is this bug the same as https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62097
As that bug states this issue is present on darwin and the patch I posted fixes
the issues on that host.
>From gcc-bugs-return-574678-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 22:52:08 2017
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Subject: [Bug libgcc/62097] t-hardfp requires GNU sed
Date: Sat, 09 Sep 2017 22:52:00 -0000
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--- Comment #11 from Chris Johns <chrisj at rtems dot org> ---
Bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66032 has a patch using awk
that lets the build complete without an error.
The problem is still present on FreeBSD and darwin.
>From gcc-bugs-return-574679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 22:55:29 2017
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From: "joel.sherrill at oarcorp dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libgcc/66032] RTEMS MIPS build fails on FreeBSD
Date: Sat, 09 Sep 2017 22:55:00 -0000
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--- Comment #8 from joel.sherrill at oarcorp dot com ---
Yes. I think they are exactly the same.
--joel
On Sep 9, 2017, at 5:50 PM, chrisj at rtems dot org
<gcc-bugzilla@gcc.gnu.org<mailto:gcc-bugzilla@gcc.gnu.org>> wrote:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66032
--- Comment #7 from Chris Johns <chrisj at rtems dot org> ---
Is this bug the same as https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62097
As that bug states this issue is present on darwin and the patch I posted fixes
the issues on that host.
>From gcc-bugs-return-574681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 23:06:56 2017
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Subject: [Bug libgcc/66032] RTEMS MIPS build fails on FreeBSD
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Joel Sherrill <joel at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |joel at gcc dot gnu.org
--- Comment #9 from Joel Sherrill <joel at gcc dot gnu.org> ---
Yes. I believe it is the same bug. Use of GNU sed specifics on a system without
GNU sed.
I don't know if that changes the resolution.
>From gcc-bugs-return-574680-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 23:06:10 2017
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Subject: [Bug rtl-optimization/82153] missed optimization: double rounding
Date: Sat, 09 Sep 2017 23:06:00 -0000
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--- Comment #4 from Arjan van de Ven <arjan at linux dot intel.com> ---
btw gcc has no issue with just generating cvttsd2si
int roundme2(double A)
{
return A * 4.3;
}
generates
20: f2 0f 59 05 00 00 00 mulsd 0x0(%rip),%xmm0 # 28
<roundme2+0x8>
27: 00
28: f2 0f 2c c0 cvttsd2si %xmm0,%eax
2c: c3 retq
so maybe the real missed optimization is a trunc() followed by
assign-to-integer as a general thing
>From gcc-bugs-return-574682-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 23:33:32 2017
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Subject: [Bug libgcc/66032] RTEMS MIPS build fails on FreeBSD
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--- Comment #10 from Chris Johns <chrisj at rtems dot org> ---
(In reply to Joel Sherrill from comment #9)
> Yes. I believe it is the same bug. Use of GNU sed specifics on a system
> without GNU sed.
>
> I don't know if that changes the resolution.
For this bug that is true however the other bug is still open and so the issue
is not resolved so I hope there is a chance someone with a suitable level of
sed knowledge may take a look to see if the use can be made to be universal or
highlight a bug in BSD sed. I had a look but I could not determine if the issue
is in the sed expressions used or BSD sed.
>From gcc-bugs-return-574684-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 23:42:58 2017
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Subject: [Bug target/82156] [7/8 regression] Atomic is_lock_free is not true for 16 byte type
Date: Sat, 09 Sep 2017 23:42:00 -0000
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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Second, the return of __atomic_always_lock_free and
__atomic_is_lock_free are changed to report false for the affected
accesses. This aims at making users aware of the fact that they don't
get fast hardware-backed performance for the affected accesses.
>From gcc-bugs-return-574683-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Sep 09 23:42:27 2017
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Subject: [Bug target/82156] [7/8 regression] Atomic is_lock_free is not true for 16 byte type
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-pc-linux-gnu
Status|UNCONFIRMED |RESOLVED
Component|libstdc++ |target
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2017-01/msg02344.html
>From gcc-bugs-return-574685-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 00:27:50 2017
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From: "bique.alexandre at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/82164] New: AddressSanitizer: stack-buffer-overflow while constructing std::regex
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Bug ID: 82164
Summary: AddressSanitizer: stack-buffer-overflow while
constructing std::regex
Product: gcc
Version: 7.2.0
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Hi,
I'd like to report a bug regarding libstdc++ crashing in the regex engine:
Compiling this:
const std::regex kNewLineEscaped("(\\\\r\\\\n)|(\\\\n)|(\\\\r)");
const std::regex kNewLineRaw("[\n\r]+", std::regex::basic |
std::regex::optimize);
const std::regex kTabRaw("[\t]");
const std::regex kComma("[,]");
const std::regex kSlash("[/]");
Will generate the following error at runtime:
==6700==ERROR: AddressSanitizer: stack-buffer-overflow on address
0x7ffce71cd978 at pc 0x7f31c9b2402d bp 0x7ffce71cd890 sp
0x7ffce71cd880
WRITE of size 8 at 0x7ffce71cd978 thread T0
#0 0x7f31c9b2402c in _Deque_iterator
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/stl_deque.h:153
#1 0x7f31c9b24b6f in
std::deque<std::__detail::_StateSeq<std::__cxx11::regex_traits<char>
>, std::allocator<std::__detail::_StateSeq<std::__cxx11::regex_traits<char>
> > >::begin() /usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/stl_deque.h:1167
#2 0x7f31c9b24a34 in ~deque
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/stl_deque.h:1045
#3 0x7f31c9ac3554 in ~stack
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/stl_stack.h:99
#4 0x7f31c9ac1824 in _Compiler
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/regex_compiler.tcc:90
#5 0x7f31c9ac112d in
_ZNSt8__detail13__compile_nfaIPKcNSt7__cxx1112regex_traitsIcEEEENSt9enable_ifIXsr27__is_contiguous_normal_iterIT_EE5valueESt10shared_ptrIKNS_4_NFAIT0_EEEE4typeES7_S7_RKNSA_11locale_typeENSt15regex_constants18syntax_option_typeE
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/regex_compiler.h:203
#6 0x7f31c9ac0e33 in basic_regex<const char *>
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/regex.h:768
#7 0x7f31c9ac0986 in basic_regex<const char *>
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/regex.h:512
#8 0x7f31c9abf336 in basic_regex
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/regex.h:445
#9 0x7f31c97606fb in __cxx_global_var_init.6
../../AudioModulesFrame/AM_StdLibExtensions.cpp:11
#10 0x7f31c976084d in _GLOBAL__sub_I_AM_StdLibExtensions.cpp
../../AudioModulesFrame/AM_StdLibExtensions.cpp
#11 0x7f31d0329579 in call_init.part.0 (/lib64/ld-linux-x86-64.so.2+0xf579)
#12 0x7f31d0329685 in _dl_init (/lib64/ld-linux-x86-64.so.2+0xf685)
#13 0x7f31d032db5d in dl_open_worker (/lib64/ld-linux-x86-64.so.2+0x13b5d)
#14 0x7f31ce54beb3 in __GI__dl_catch_error (/usr/lib/libc.so.6+0x131eb3)
#15 0x7f31d032d379 in _dl_open (/lib64/ld-linux-x86-64.so.2+0x13379)
#16 0x7f31cef52e85 (/usr/lib/libdl.so.2+0xe85)
#17 0x7f31ce54beb3 in __GI__dl_catch_error (/usr/lib/libc.so.6+0x131eb3)
#18 0x7f31cef53586 (/usr/lib/libdl.so.2+0x1586)
#19 0x7f31cef52f21 in dlopen (/usr/lib/libdl.so.2+0xf21)
#20 0x7f31cf3abd98 in __interceptor_dlopen
/build/gcc-multilib/src/gcc/libsanitizer/sanitizer_common/sanitizer_common_interceptors.inc:5364
#21 0x55abc3a21cb7 in Vst2Plugin::loadDLL()
(/home/abique/develop/bitwig/alex-future/target/bin/release/BitwigPluginHost64+0xa8cb7)
#22 0x55abc3a2218e in Vst2PluginApi::loadPlugin(PluginHost*,
base::core::String)
(/home/abique/develop/bitwig/alex-future/target/bin/release/BitwigPluginHost64+0xa918e)
#23 0x55abc39cc7d5 in PluginHost::getPlugin(base::core::String
const&)
(/home/abique/develop/bitwig/alex-future/target/bin/release/BitwigPluginHost64+0x537d5)
#24 0x55abc39d41a1 in writePluginInfo(base::core::String,
base::core::OutputStream*)
(/home/abique/develop/bitwig/alex-future/target/bin/release/BitwigPluginHost64+0x5b1a1)
#25 0x55abc39bb47f in main
(/home/abique/develop/bitwig/alex-future/target/bin/release/BitwigPluginHost64+0x4247f)
#26 0x7f31ce43af69 in __libc_start_main (/usr/lib/libc.so.6+0x20f69)
#27 0x55abc39be9d9 in _start
(/home/abique/develop/bitwig/alex-future/target/bin/release/BitwigPluginHost64+0x459d9)
Address 0x7ffce71cd978 is located in stack of thread T0 at offset 56 in frame
#0 0x7f31c9b2493f in ~deque
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/stl_deque.h:1045
This frame has 2 object(s):
[32, 64) 'agg.tmp' <== Memory access at offset 56 is inside this variable
[96, 128) 'agg.tmp2'
HINT: this may be a false positive if your program uses some custom
stack unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-overflow
/usr/bin/../lib64/gcc/x86_64-pc-linux-gnu/7.2.0/../../../../include/c++/7.2.0/bits/stl_deque.h:153
in _Deque_iterator
Shadow bytes around the buggy address:
0x10001ce31ad0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001ce31ae0: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
0x10001ce31af0: 00 00 00 f2 f2 f2 f2 f2 00 00 00 f2 f2 f2 f2 f2
0x10001ce31b00: 00 00 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00
0x10001ce31b10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x10001ce31b20: f1 f1 f1 f1 00 00 00 f2 f1 f1 f1 f1 00 00 00[f2]
0x10001ce31b30: f2 f2 f2 f2 00 00 00 f3 f3 f3 f3 f3 00 00 00 00
0x10001ce31b40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001ce31b50: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2
0x10001ce31b60: 00 00 00 f2 f2 f2 f2 f2 00 00 00 f3 f3 f3 f3 f3
0x10001ce31b70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==6700==ABORTING
I am using Archlinux 64 bits, my system is up to date as of 10-09-2017.
I believe that the bug is in the libstdc++/regex, as I could reproduce the
issue with clang 4.0.1.
pacman -Qi gcc-multilib
Name : gcc-multilib
Version : 7.2.0-1
pacman -Qi binutils
Name : binutils
Version : 2.29.0-1
Regards,
Alexandre
>From gcc-bugs-return-574686-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 01:36:27 2017
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From: "ivan.pogrebnyak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82165] New: Operator overloading doesn't work with enum bit fields
Date: Sun, 10 Sep 2017 01:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82165
Bug ID: 82165
Summary: Operator overloading doesn't work with enum bit fields
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
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Here's a short test program that illustrates the issue:
#include <iostream>
#define TEST(var) std::cout << #var " = " << var << std::endl;
struct flags {
enum field { f0, f1, no_field };
field b0 : 4;
field b1 : 4;
field a0, a1;
};
inline bool operator!(flags::field f) {
std::cout << "(!) ";
return f == flags::no_field;
}
int main() {
flags f;
f.b0 = flags::f0;
f.b1 = flags::f1;
f.a0 = flags::f0;
f.a1 = flags::f1;
std::cout << "******** test enum values" << std::endl;
TEST( flags::f0 ) // 0
TEST( flags::f1 ) // 1
TEST( flags::no_field ) // 2
TEST( !flags::f0 ) // (!) 0
TEST( !flags::f1 ) // (!) 0
TEST( !flags::no_field ) // (!) 1
std::cout << "\n******** test regular members" << std::endl;
TEST( f.a0 ) // 0
TEST( f.a1 ) // 1
TEST( !f.a0 ) // (!) 0
TEST( !f.a1 ) // (!) 0
std::cout << "\n******** test bit field members" << std::endl;
TEST( f.b0 ) // 0
TEST( f.b1 ) // 1
TEST( !f.b0 ) // expected "(!) 0", but got "1"
TEST( !f.b1 ) // expected "(!) 0", but got "0"
}
As can be seen from the output of the tests with bit field members, the "(!)"
is not printed, and the integral values are negated, rather then compared to
the `flags::no_field`.
This doesn't appear to be a recently introduced bug, as I got the same behavior
using GCC 7.2.0, 6.3.0, 5.4.0, and 4.8.1.
>From gcc-bugs-return-574687-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 04:41:25 2017
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From: "helloqirun at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82166] New: gcc ICE at -Os on valid code on x86_64-linux-gnu in "ix86_finalize_stack_frame_flags"
Date: Sun, 10 Sep 2017 04:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82166
Bug ID: 82166
Summary: gcc ICE at -Os on valid code on x86_64-linux-gnu in
"ix86_finalize_stack_frame_flags"
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/home/absozero/trunk/root-gcc/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/home/absozero/trunk/root-gcc
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 8.0.0 20170909 (experimental) [trunk revision 251936] (GCC)
$ gcc-trunk -Os -m32 abc.c
abc.c:1:6: warning: conflicting types for built-in function ‘printf’
[-Wbuiltin-declaration-mismatch]
void printf();
^~~~~~
during RTL pass: pro_and_epilogue
abc.c: In function ‘main’:
abc.c:9:1: internal compiler error: in ix86_finalize_stack_frame_flags, at
config/i386/i386.c:14271
}
^
0x7ada6c ix86_finalize_stack_frame_flags
../../gcc/gcc/config/i386/i386.c:14271
0xfc71fb ix86_expand_epilogue(int)
../../gcc/gcc/config/i386/i386.c:15414
0x11b7b8f gen_epilogue()
../../gcc/gcc/config/i386/i386.md:12700
0xfaae48 target_gen_epilogue
../../gcc/gcc/config/i386/i386.md:12211
0xae15e8 make_epilogue_seq
../../gcc/gcc/function.c:5864
0xae16fc thread_prologue_and_epilogue_insns()
../../gcc/gcc/function.c:5946
0xae1dc2 rest_of_handle_thread_prologue_and_epilogue
../../gcc/gcc/function.c:6436
0xae1dc2 execute
../../gcc/gcc/function.c:6478
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$ cat abc.c
void printf();
int a, b, c;
int main() {
int j;
for (; c;)
a = b;
for (; j;)
printf();
}
>From gcc-bugs-return-574688-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 05:06:39 2017
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Subject: [Bug middle-end/82149] match.pd: 2919: bad if test ?
Date: Sun, 10 Sep 2017 05:06:00 -0000
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--- Comment #3 from Yury Gribov <ygribov at gcc dot gnu.org> ---
Thanks, the inner condition definitely needs to be && instead of ||. Would
anyone mind submitting this? I'm OOO until end of the week...
>From gcc-bugs-return-574689-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 08:44:42 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/81852] Feature request: __cpp_threadsafe_static_init
Date: Sun, 10 Sep 2017 08:44:00 -0000
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--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Sun Sep 10 08:44:04 2017
New Revision: 251946
URL: https://gcc.gnu.org/viewcvs?rev=251946&root=gcc&view=rev
Log:
PR c++/81852 define feature-test macro for -fthreadsafe-statics
gcc/c-family:
PR c++/81852
* c-cppbuiltin.c (c_cpp_builtins): Define __cpp_threadsafe_static_init.
gcc/testsuite:
PR c++/81852
* g++.dg/cpp1y/feat-cxx11.C: Check __cpp_threadsafe_static_init.
* g++.dg/cpp1y/feat-cxx14.C: Likewise.
* g++.dg/cpp1y/feat-cxx98.C: Likewise.
* g++.dg/cpp1y/feat-neg.C: Likewise.
* g++.dg/cpp1z/feat-cxx1z.C: Likewise.
Modified:
branches/gcc-7-branch/gcc/c-family/ChangeLog
branches/gcc-7-branch/gcc/c-family/c-cppbuiltin.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/g++.dg/cpp1y/feat-cxx11.C
branches/gcc-7-branch/gcc/testsuite/g++.dg/cpp1y/feat-cxx14.C
branches/gcc-7-branch/gcc/testsuite/g++.dg/cpp1y/feat-cxx98.C
branches/gcc-7-branch/gcc/testsuite/g++.dg/cpp1y/feat-neg.C
branches/gcc-7-branch/gcc/testsuite/g++.dg/cpp1z/feat-cxx1z.C
>From gcc-bugs-return-574690-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 09:06:09 2017
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Subject: [Bug c++/81852] Feature request: __cpp_threadsafe_static_init
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Sun Sep 10 09:05:31 2017
New Revision: 251947
URL: https://gcc.gnu.org/viewcvs?rev=251947&root=gcc&view=rev
Log:
PR c++/81852 define feature-test macro for -fthreadsafe-statics
gcc/c-family:
PR c++/81852
* c-cppbuiltin.c (c_cpp_builtins): Define __cpp_threadsafe_static_init.
gcc/testsuite:
PR c++/81852
* g++.dg/cpp1y/feat-cxx11.C: Check __cpp_threadsafe_static_init.
* g++.dg/cpp1y/feat-cxx14.C: Likewise.
* g++.dg/cpp1y/feat-cxx98.C: Likewise.
* g++.dg/cpp1y/feat-neg.C: Likewise.
* g++.dg/cpp1z/feat-cxx1z.C: Likewise.
Modified:
branches/gcc-6-branch/gcc/c-family/ChangeLog
branches/gcc-6-branch/gcc/c-family/c-cppbuiltin.c
branches/gcc-6-branch/gcc/testsuite/ChangeLog
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/feat-cxx11.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/feat-cxx14.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/feat-cxx98.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1y/feat-neg.C
branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp1z/feat-cxx1z.C
>From gcc-bugs-return-574691-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 09:58:46 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82141] [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Sun, 10 Sep 2017 09:58:00 -0000
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--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Reduced range: r251759 configured with
../work/configure --prefix=/opt/gcc/gcc8w
--enable-languages=c,c++,fortran,objc,obj-c++,ada,lto --with-gmp=/opt/mp-new
--with-system-zlib --with-isl=/opt/mp-new --enable-lto --enable-plugin
--with-arch=corei7 --with-cpu=corei7
bootstraps with the patch, r251792 does not.
>From gcc-bugs-return-574692-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 11:26:13 2017
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From: "felix.von.s at posteo dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/14557] va_list is automatically taken address-of when passed as argument
Date: Sun, 10 Sep 2017 11:26:00 -0000
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felix <felix.von.s at posteo dot de> changed:
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CC| |felix.von.s at posteo dot de
--- Comment #19 from felix <felix.von.s at posteo dot de> ---
The number of duplicates of this report isn't terribly high, but doesn't this
at least deserve a mention in the 'Disappointments' section of the manual?
In any case, the following macro could be used as a workaround, under some
rather reasonable assumptions:
#if __STDC_VERSION__ >= 201112L
#define va_ptr(ap) _Generic(&(ap), va_list *: &(ap), default: (va_list *)(ap))
#elif __GNUC__ >= 4
#define va_ptr(ap)
__builtin_choose_expr(__builtin_types_compatible_p(__typeof__(&(ap)), va_list
*), &(ap), (va_list *)(ap))
#else
#define va_ptr(ap) (sizeof(ap) == sizeof(va_list) ? (va_list *)&(ap) : (va_list
*)(ap))
#endif
The main assumption is that a pointer to an array is the same as a pointer to
its zeroth element, i.e. when we have a variable T array[N]; then (&array == (T
(*)[N])array); or at least that this holds for the array type that va_list is.
I don't see anything in the C standard that would explicitly guarantee this,
but this should be a safe assumption to make, because breaking it would
presumably make the following memcpy calls non-equivalent:
T array0[N], array1[N];
memcpy(array1, array0, sizeof(array0));
memcpy(&array1, array0, sizeof(array0));
memcpy(array1, &array0, sizeof(array0));
memcpy(&array1, &array0, sizeof(array0));
which would be strange. Furthermore, the last version will break in the
presence of va_list defined like
typedef void *va_list[1];
typedef char va_list[sizeof(char *)];
but I think it's reasonable to assume that no ABI standard is going to
prescribe something like this. None of the targets currently supported by GCC
do.
>From gcc-bugs-return-574693-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 11:43:07 2017
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From: "felix.von.s at posteo dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82167] New: Segmentation fault when dereferencing the address of an array argument
Date: Sun, 10 Sep 2017 11:43:00 -0000
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Bug ID: 82167
Summary: Segmentation fault when dereferencing the address of
an array argument
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
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Priority: P3
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Created attachment 42145
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42145&action=edit
Result of running gcc -v -S on the source code given
Attempting to compile the code below triggers a segmentation fault in the
front-end.
int main(int argc, char *argv[]) {
__builtin_printf("%zu\n", sizeof(*&argv));
return 0;
}
I discovered this when I was searching for a way to locally silence
-Wsizeof-array-argument (without necessarily knowing if a variable was declared
as an array in the first place), in relation to my comment under bug #14557. Is
there any way to do that, by the way?
>From gcc-bugs-return-574694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 12:19:57 2017
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Subject: [Bug c/82105] unexpected padding in a struct
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--- Comment #9 from Dudu <dudu.arbel at ilrd dot co.il> ---
So, Andreas, why this struct's size is 16?
typedef struct
{
long x:16;
int y:17;
short z;
} SizeofThisIs16;
>From gcc-bugs-return-574695-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 13:28:39 2017
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From: "felix.von.s at posteo dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82167] Segmentation fault when dereferencing the address of an array argument
Date: Sun, 10 Sep 2017 13:28:00 -0000
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--- Comment #1 from felix <felix.von.s at posteo dot de> ---
Hmm, never mind my question, I found one way to do it...
#define NO_SIZEOF_WARNING(expr) ({ \
_Pragma("GCC diagnostic push") \
_Pragma("GCC diagnostic ignored \"-Wsizeof-array-argument\"") \
__typeof__((expr)) _value = (expr); \
_Pragma("GCC diagnostic pop") \
_value; \
})
Not the most concise code ever, but it works.
>From gcc-bugs-return-574696-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 13:38:09 2017
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Subject: [Bug bootstrap/82160] [8 Regression] Mysterious testsuite failures
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H.J. Lu <hjl.tools at gmail dot com> changed:
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
They passed now with r251945.
>From gcc-bugs-return-574697-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 14:33:19 2017
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Subject: [Bug target/82166] gcc ICE at -Os on valid code on x86_64-linux-gnu in "ix86_finalize_stack_frame_flags"
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--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
It is caused r251718.
>From gcc-bugs-return-574698-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 14:33:38 2017
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Subject: [Bug target/82166] gcc ICE at -Os on valid code on x86_64-linux-gnu in "ix86_finalize_stack_frame_flags"
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--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Mine.
>From gcc-bugs-return-574699-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 17:03:31 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/57019] [5/6/7/8 Regression] Compiler crashes (and make wrong assignments) at some combinations of pointers
Date: Sun, 10 Sep 2017 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57019
--- Comment #14 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sun Sep 10 17:02:53 2017
New Revision: 251949
URL: https://gcc.gnu.org/viewcvs?rev=251949&root=gcc&view=rev
Log:
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
PR fortran/40737
PR fortran/55763
PR fortran/57019
PR fortran/57116
* expr.c (is_subref_array): Add class pointer array dummies
to the list of expressions that return true.
* trans-array.c: Add SPAN_FIELD and update indices for
subsequent fields.
(gfc_conv_descriptor_span, gfc_conv_descriptor_span_get,
gfc_conv_descriptor_span_set, is_pointer_array,
get_array_span): New functions.
(gfc_get_descriptor_offsets_for_info): New function to preserve
API for access to descriptor fields for trans-types.c.
(gfc_conv_scalarized_array_ref): If the expression is a subref
array, make sure that info->descriptor is a descriptor type.
Otherwise, if info->descriptor is a pointer array, set 'decl'
and fix it if it is a component reference.
(build_array_ref): Simplify handling of class array refs by
passing the vptr to gfc_build_array_ref rather than generating
the pointer arithmetic in this function.
(gfc_conv_array_ref): As in gfc_conv_scalarized_array_ref, set
'decl'.
(gfc_array_allocate): Set the span field if this is a pointer
array. Use the expr3 element size if it is available, so that
the dynamic type element size is used.
(gfc_conv_expr_descriptor): Set the span field for pointer
assignments.
* trans-array.h: Prototypes for gfc_conv_descriptor_span_get
gfc_conv_descriptor_span_set and
gfc_get_descriptor_offsets_for_info added.
trans-decl.c (gfc_get_symbol_decl): If a non-class pointer
array, mark the declaration as a GFC_DECL_PTR_ARRAY_P. Remove
the setting of GFC_DECL_SPAN.
(gfc_trans_deferred_vars): Set the span field to zero in thge
originating scope.
* trans-expr.c (gfc_conv_procedure_call): Do not use copy-in/
copy-out to pass subref expressions to a pointer dummy.
(gfc_trans_pointer_assignment): Remove code for setting of
GFC_DECL_SPAN. Set the 'span' field for non-class pointers to
class function results. Likewise for rank remap. In the case
that the target is not a whole array, use the target array ref
for remap and, since the 'start' indices are missing, set the
lbounds to one, as required by the standard.
* trans-intrinsic.c (conv_expr_ref_to_caf_ref): Pick up the
'token' offset from the field decl in the descriptor.
(conv_isocbinding_subroutine): Set the 'span' field.
* trans-io.c (gfc_trans_transfer): Always scalarize pointer
array io.
* trans-stmt.c (trans_associate_var): Set the 'span' field.
* trans-types.c (gfc_get_array_descriptor_base): Add the 'span'
field to the array descriptor.
(gfc_get_derived_type): Pointer array components are marked as
GFC_DECL_PTR_ARRAY_P.
(gfc_get_array_descr_info): Replaced API breaking code for
descriptor offset calling gfc_get_descriptor_offsets_for_info.
* trans.c (get_array_span): New function.
(gfc_build_array_ref): Simplify by calling get_array_span and
obtain 'span' if 'decl' or 'vptr' present.
* trans.h : Rename DECL_LANG_FLAG_6, GFC_DECL_SUBREF_ARRAY_P,
as GFC_DECL_PTR_ARRAY_P.
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
* gfortran.dg/associate_24.f90: New test.
* gfortran.dg/assumed_type_2.f90: Adjust some of the tree dump
checks.
* gfortran.dg/no_arg_check_2.f90: Likewise.
* gfortran.dg/pointer_array_1.f90: New test.
* gfortran.dg/pointer_array_2.f90: New test.
* gfortran.dg/pointer_array_7.f90: New test.
* gfortran.dg/pointer_array_8.f90: New test.
* gfortran.dg/pointer_array_component_1.f90: New test.
* gfortran.dg/pointer_array_component_2.f90: New test.
* gfortran.dg/goacc/kernels-alias-4.f95: Bump up both tree scan
counts by 1.
PR fortran/40737
* gfortran.dg/pointer_array_3.f90: New test.
PR fortran/57116
* gfortran.dg/pointer_array_4.f90: New test.
PR fortran/55763
* gfortran.dg/pointer_array_5.f90: New test.
PR fortran/57019
* gfortran.dg/pointer_array_6.f90: New test.
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
* libgfortran/libgfortran.h: Add span field to descriptor.
* libgfortran/libtool-version : Bump up version number to 5:0:0.
Added:
trunk/gcc/testsuite/gfortran.dg/associate_24.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_1.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_2.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_3.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_4.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_5.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_6.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_7.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_8.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_component_1.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_component_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-array.h
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-intrinsic.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/fortran/trans-types.c
trunk/gcc/fortran/trans.c
trunk/gcc/fortran/trans.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/assumed_type_2.f90
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-alias-4.f95
trunk/gcc/testsuite/gfortran.dg/no_arg_check_2.f90
trunk/libgfortran/ChangeLog
trunk/libgfortran/libgfortran.h
trunk/libgfortran/libtool-version
>From gcc-bugs-return-574703-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 17:03:36 2017
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Subject: [Bug fortran/34640] ICE when assigning item of a derived-component to a pointer
Date: Sun, 10 Sep 2017 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=34640
--- Comment #35 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sun Sep 10 17:02:53 2017
New Revision: 251949
URL: https://gcc.gnu.org/viewcvs?rev=251949&root=gcc&view=rev
Log:
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
PR fortran/40737
PR fortran/55763
PR fortran/57019
PR fortran/57116
* expr.c (is_subref_array): Add class pointer array dummies
to the list of expressions that return true.
* trans-array.c: Add SPAN_FIELD and update indices for
subsequent fields.
(gfc_conv_descriptor_span, gfc_conv_descriptor_span_get,
gfc_conv_descriptor_span_set, is_pointer_array,
get_array_span): New functions.
(gfc_get_descriptor_offsets_for_info): New function to preserve
API for access to descriptor fields for trans-types.c.
(gfc_conv_scalarized_array_ref): If the expression is a subref
array, make sure that info->descriptor is a descriptor type.
Otherwise, if info->descriptor is a pointer array, set 'decl'
and fix it if it is a component reference.
(build_array_ref): Simplify handling of class array refs by
passing the vptr to gfc_build_array_ref rather than generating
the pointer arithmetic in this function.
(gfc_conv_array_ref): As in gfc_conv_scalarized_array_ref, set
'decl'.
(gfc_array_allocate): Set the span field if this is a pointer
array. Use the expr3 element size if it is available, so that
the dynamic type element size is used.
(gfc_conv_expr_descriptor): Set the span field for pointer
assignments.
* trans-array.h: Prototypes for gfc_conv_descriptor_span_get
gfc_conv_descriptor_span_set and
gfc_get_descriptor_offsets_for_info added.
trans-decl.c (gfc_get_symbol_decl): If a non-class pointer
array, mark the declaration as a GFC_DECL_PTR_ARRAY_P. Remove
the setting of GFC_DECL_SPAN.
(gfc_trans_deferred_vars): Set the span field to zero in thge
originating scope.
* trans-expr.c (gfc_conv_procedure_call): Do not use copy-in/
copy-out to pass subref expressions to a pointer dummy.
(gfc_trans_pointer_assignment): Remove code for setting of
GFC_DECL_SPAN. Set the 'span' field for non-class pointers to
class function results. Likewise for rank remap. In the case
that the target is not a whole array, use the target array ref
for remap and, since the 'start' indices are missing, set the
lbounds to one, as required by the standard.
* trans-intrinsic.c (conv_expr_ref_to_caf_ref): Pick up the
'token' offset from the field decl in the descriptor.
(conv_isocbinding_subroutine): Set the 'span' field.
* trans-io.c (gfc_trans_transfer): Always scalarize pointer
array io.
* trans-stmt.c (trans_associate_var): Set the 'span' field.
* trans-types.c (gfc_get_array_descriptor_base): Add the 'span'
field to the array descriptor.
(gfc_get_derived_type): Pointer array components are marked as
GFC_DECL_PTR_ARRAY_P.
(gfc_get_array_descr_info): Replaced API breaking code for
descriptor offset calling gfc_get_descriptor_offsets_for_info.
* trans.c (get_array_span): New function.
(gfc_build_array_ref): Simplify by calling get_array_span and
obtain 'span' if 'decl' or 'vptr' present.
* trans.h : Rename DECL_LANG_FLAG_6, GFC_DECL_SUBREF_ARRAY_P,
as GFC_DECL_PTR_ARRAY_P.
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
* gfortran.dg/associate_24.f90: New test.
* gfortran.dg/assumed_type_2.f90: Adjust some of the tree dump
checks.
* gfortran.dg/no_arg_check_2.f90: Likewise.
* gfortran.dg/pointer_array_1.f90: New test.
* gfortran.dg/pointer_array_2.f90: New test.
* gfortran.dg/pointer_array_7.f90: New test.
* gfortran.dg/pointer_array_8.f90: New test.
* gfortran.dg/pointer_array_component_1.f90: New test.
* gfortran.dg/pointer_array_component_2.f90: New test.
* gfortran.dg/goacc/kernels-alias-4.f95: Bump up both tree scan
counts by 1.
PR fortran/40737
* gfortran.dg/pointer_array_3.f90: New test.
PR fortran/57116
* gfortran.dg/pointer_array_4.f90: New test.
PR fortran/55763
* gfortran.dg/pointer_array_5.f90: New test.
PR fortran/57019
* gfortran.dg/pointer_array_6.f90: New test.
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
* libgfortran/libgfortran.h: Add span field to descriptor.
* libgfortran/libtool-version : Bump up version number to 5:0:0.
Added:
trunk/gcc/testsuite/gfortran.dg/associate_24.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_1.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_2.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_3.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_4.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_5.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_6.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_7.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_8.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_component_1.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_component_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-array.h
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-intrinsic.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/fortran/trans-types.c
trunk/gcc/fortran/trans.c
trunk/gcc/fortran/trans.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/assumed_type_2.f90
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-alias-4.f95
trunk/gcc/testsuite/gfortran.dg/no_arg_check_2.f90
trunk/libgfortran/ChangeLog
trunk/libgfortran/libgfortran.h
trunk/libgfortran/libtool-version
>From gcc-bugs-return-574702-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 17:03:35 2017
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Subject: [Bug fortran/40737] Pointer references sometimes fail to define "span" symbols
Date: Sun, 10 Sep 2017 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40737
--- Comment #19 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sun Sep 10 17:02:53 2017
New Revision: 251949
URL: https://gcc.gnu.org/viewcvs?rev=251949&root=gcc&view=rev
Log:
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
PR fortran/40737
PR fortran/55763
PR fortran/57019
PR fortran/57116
* expr.c (is_subref_array): Add class pointer array dummies
to the list of expressions that return true.
* trans-array.c: Add SPAN_FIELD and update indices for
subsequent fields.
(gfc_conv_descriptor_span, gfc_conv_descriptor_span_get,
gfc_conv_descriptor_span_set, is_pointer_array,
get_array_span): New functions.
(gfc_get_descriptor_offsets_for_info): New function to preserve
API for access to descriptor fields for trans-types.c.
(gfc_conv_scalarized_array_ref): If the expression is a subref
array, make sure that info->descriptor is a descriptor type.
Otherwise, if info->descriptor is a pointer array, set 'decl'
and fix it if it is a component reference.
(build_array_ref): Simplify handling of class array refs by
passing the vptr to gfc_build_array_ref rather than generating
the pointer arithmetic in this function.
(gfc_conv_array_ref): As in gfc_conv_scalarized_array_ref, set
'decl'.
(gfc_array_allocate): Set the span field if this is a pointer
array. Use the expr3 element size if it is available, so that
the dynamic type element size is used.
(gfc_conv_expr_descriptor): Set the span field for pointer
assignments.
* trans-array.h: Prototypes for gfc_conv_descriptor_span_get
gfc_conv_descriptor_span_set and
gfc_get_descriptor_offsets_for_info added.
trans-decl.c (gfc_get_symbol_decl): If a non-class pointer
array, mark the declaration as a GFC_DECL_PTR_ARRAY_P. Remove
the setting of GFC_DECL_SPAN.
(gfc_trans_deferred_vars): Set the span field to zero in thge
originating scope.
* trans-expr.c (gfc_conv_procedure_call): Do not use copy-in/
copy-out to pass subref expressions to a pointer dummy.
(gfc_trans_pointer_assignment): Remove code for setting of
GFC_DECL_SPAN. Set the 'span' field for non-class pointers to
class function results. Likewise for rank remap. In the case
that the target is not a whole array, use the target array ref
for remap and, since the 'start' indices are missing, set the
lbounds to one, as required by the standard.
* trans-intrinsic.c (conv_expr_ref_to_caf_ref): Pick up the
'token' offset from the field decl in the descriptor.
(conv_isocbinding_subroutine): Set the 'span' field.
* trans-io.c (gfc_trans_transfer): Always scalarize pointer
array io.
* trans-stmt.c (trans_associate_var): Set the 'span' field.
* trans-types.c (gfc_get_array_descriptor_base): Add the 'span'
field to the array descriptor.
(gfc_get_derived_type): Pointer array components are marked as
GFC_DECL_PTR_ARRAY_P.
(gfc_get_array_descr_info): Replaced API breaking code for
descriptor offset calling gfc_get_descriptor_offsets_for_info.
* trans.c (get_array_span): New function.
(gfc_build_array_ref): Simplify by calling get_array_span and
obtain 'span' if 'decl' or 'vptr' present.
* trans.h : Rename DECL_LANG_FLAG_6, GFC_DECL_SUBREF_ARRAY_P,
as GFC_DECL_PTR_ARRAY_P.
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
* gfortran.dg/associate_24.f90: New test.
* gfortran.dg/assumed_type_2.f90: Adjust some of the tree dump
checks.
* gfortran.dg/no_arg_check_2.f90: Likewise.
* gfortran.dg/pointer_array_1.f90: New test.
* gfortran.dg/pointer_array_2.f90: New test.
* gfortran.dg/pointer_array_7.f90: New test.
* gfortran.dg/pointer_array_8.f90: New test.
* gfortran.dg/pointer_array_component_1.f90: New test.
* gfortran.dg/pointer_array_component_2.f90: New test.
* gfortran.dg/goacc/kernels-alias-4.f95: Bump up both tree scan
counts by 1.
PR fortran/40737
* gfortran.dg/pointer_array_3.f90: New test.
PR fortran/57116
* gfortran.dg/pointer_array_4.f90: New test.
PR fortran/55763
* gfortran.dg/pointer_array_5.f90: New test.
PR fortran/57019
* gfortran.dg/pointer_array_6.f90: New test.
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
* libgfortran/libgfortran.h: Add span field to descriptor.
* libgfortran/libtool-version : Bump up version number to 5:0:0.
Added:
trunk/gcc/testsuite/gfortran.dg/associate_24.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_1.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_2.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_3.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_4.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_5.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_6.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_7.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_8.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_component_1.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_component_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-array.h
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-intrinsic.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/fortran/trans-types.c
trunk/gcc/fortran/trans.c
trunk/gcc/fortran/trans.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/assumed_type_2.f90
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-alias-4.f95
trunk/gcc/testsuite/gfortran.dg/no_arg_check_2.f90
trunk/libgfortran/ChangeLog
trunk/libgfortran/libgfortran.h
trunk/libgfortran/libtool-version
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Subject: [Bug fortran/55763] Issues with some simpler CLASS(*) programs
Date: Sun, 10 Sep 2017 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55763
--- Comment #25 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sun Sep 10 17:02:53 2017
New Revision: 251949
URL: https://gcc.gnu.org/viewcvs?rev=251949&root=gcc&view=rev
Log:
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
PR fortran/40737
PR fortran/55763
PR fortran/57019
PR fortran/57116
* expr.c (is_subref_array): Add class pointer array dummies
to the list of expressions that return true.
* trans-array.c: Add SPAN_FIELD and update indices for
subsequent fields.
(gfc_conv_descriptor_span, gfc_conv_descriptor_span_get,
gfc_conv_descriptor_span_set, is_pointer_array,
get_array_span): New functions.
(gfc_get_descriptor_offsets_for_info): New function to preserve
API for access to descriptor fields for trans-types.c.
(gfc_conv_scalarized_array_ref): If the expression is a subref
array, make sure that info->descriptor is a descriptor type.
Otherwise, if info->descriptor is a pointer array, set 'decl'
and fix it if it is a component reference.
(build_array_ref): Simplify handling of class array refs by
passing the vptr to gfc_build_array_ref rather than generating
the pointer arithmetic in this function.
(gfc_conv_array_ref): As in gfc_conv_scalarized_array_ref, set
'decl'.
(gfc_array_allocate): Set the span field if this is a pointer
array. Use the expr3 element size if it is available, so that
the dynamic type element size is used.
(gfc_conv_expr_descriptor): Set the span field for pointer
assignments.
* trans-array.h: Prototypes for gfc_conv_descriptor_span_get
gfc_conv_descriptor_span_set and
gfc_get_descriptor_offsets_for_info added.
trans-decl.c (gfc_get_symbol_decl): If a non-class pointer
array, mark the declaration as a GFC_DECL_PTR_ARRAY_P. Remove
the setting of GFC_DECL_SPAN.
(gfc_trans_deferred_vars): Set the span field to zero in thge
originating scope.
* trans-expr.c (gfc_conv_procedure_call): Do not use copy-in/
copy-out to pass subref expressions to a pointer dummy.
(gfc_trans_pointer_assignment): Remove code for setting of
GFC_DECL_SPAN. Set the 'span' field for non-class pointers to
class function results. Likewise for rank remap. In the case
that the target is not a whole array, use the target array ref
for remap and, since the 'start' indices are missing, set the
lbounds to one, as required by the standard.
* trans-intrinsic.c (conv_expr_ref_to_caf_ref): Pick up the
'token' offset from the field decl in the descriptor.
(conv_isocbinding_subroutine): Set the 'span' field.
* trans-io.c (gfc_trans_transfer): Always scalarize pointer
array io.
* trans-stmt.c (trans_associate_var): Set the 'span' field.
* trans-types.c (gfc_get_array_descriptor_base): Add the 'span'
field to the array descriptor.
(gfc_get_derived_type): Pointer array components are marked as
GFC_DECL_PTR_ARRAY_P.
(gfc_get_array_descr_info): Replaced API breaking code for
descriptor offset calling gfc_get_descriptor_offsets_for_info.
* trans.c (get_array_span): New function.
(gfc_build_array_ref): Simplify by calling get_array_span and
obtain 'span' if 'decl' or 'vptr' present.
* trans.h : Rename DECL_LANG_FLAG_6, GFC_DECL_SUBREF_ARRAY_P,
as GFC_DECL_PTR_ARRAY_P.
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
* gfortran.dg/associate_24.f90: New test.
* gfortran.dg/assumed_type_2.f90: Adjust some of the tree dump
checks.
* gfortran.dg/no_arg_check_2.f90: Likewise.
* gfortran.dg/pointer_array_1.f90: New test.
* gfortran.dg/pointer_array_2.f90: New test.
* gfortran.dg/pointer_array_7.f90: New test.
* gfortran.dg/pointer_array_8.f90: New test.
* gfortran.dg/pointer_array_component_1.f90: New test.
* gfortran.dg/pointer_array_component_2.f90: New test.
* gfortran.dg/goacc/kernels-alias-4.f95: Bump up both tree scan
counts by 1.
PR fortran/40737
* gfortran.dg/pointer_array_3.f90: New test.
PR fortran/57116
* gfortran.dg/pointer_array_4.f90: New test.
PR fortran/55763
* gfortran.dg/pointer_array_5.f90: New test.
PR fortran/57019
* gfortran.dg/pointer_array_6.f90: New test.
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
* libgfortran/libgfortran.h: Add span field to descriptor.
* libgfortran/libtool-version : Bump up version number to 5:0:0.
Added:
trunk/gcc/testsuite/gfortran.dg/associate_24.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_1.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_2.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_3.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_4.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_5.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_6.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_7.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_8.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_component_1.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_component_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-array.h
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-intrinsic.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/fortran/trans-types.c
trunk/gcc/fortran/trans.c
trunk/gcc/fortran/trans.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/assumed_type_2.f90
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-alias-4.f95
trunk/gcc/testsuite/gfortran.dg/no_arg_check_2.f90
trunk/libgfortran/ChangeLog
trunk/libgfortran/libgfortran.h
trunk/libgfortran/libtool-version
>From gcc-bugs-return-574700-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 17:03:35 2017
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Subject: [Bug fortran/57116] [OOP] ICE for pointer assignment inside SELECT TYPE
Date: Sun, 10 Sep 2017 17:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57116
--- Comment #4 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Sun Sep 10 17:02:53 2017
New Revision: 251949
URL: https://gcc.gnu.org/viewcvs?rev=251949&root=gcc&view=rev
Log:
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
PR fortran/40737
PR fortran/55763
PR fortran/57019
PR fortran/57116
* expr.c (is_subref_array): Add class pointer array dummies
to the list of expressions that return true.
* trans-array.c: Add SPAN_FIELD and update indices for
subsequent fields.
(gfc_conv_descriptor_span, gfc_conv_descriptor_span_get,
gfc_conv_descriptor_span_set, is_pointer_array,
get_array_span): New functions.
(gfc_get_descriptor_offsets_for_info): New function to preserve
API for access to descriptor fields for trans-types.c.
(gfc_conv_scalarized_array_ref): If the expression is a subref
array, make sure that info->descriptor is a descriptor type.
Otherwise, if info->descriptor is a pointer array, set 'decl'
and fix it if it is a component reference.
(build_array_ref): Simplify handling of class array refs by
passing the vptr to gfc_build_array_ref rather than generating
the pointer arithmetic in this function.
(gfc_conv_array_ref): As in gfc_conv_scalarized_array_ref, set
'decl'.
(gfc_array_allocate): Set the span field if this is a pointer
array. Use the expr3 element size if it is available, so that
the dynamic type element size is used.
(gfc_conv_expr_descriptor): Set the span field for pointer
assignments.
* trans-array.h: Prototypes for gfc_conv_descriptor_span_get
gfc_conv_descriptor_span_set and
gfc_get_descriptor_offsets_for_info added.
trans-decl.c (gfc_get_symbol_decl): If a non-class pointer
array, mark the declaration as a GFC_DECL_PTR_ARRAY_P. Remove
the setting of GFC_DECL_SPAN.
(gfc_trans_deferred_vars): Set the span field to zero in thge
originating scope.
* trans-expr.c (gfc_conv_procedure_call): Do not use copy-in/
copy-out to pass subref expressions to a pointer dummy.
(gfc_trans_pointer_assignment): Remove code for setting of
GFC_DECL_SPAN. Set the 'span' field for non-class pointers to
class function results. Likewise for rank remap. In the case
that the target is not a whole array, use the target array ref
for remap and, since the 'start' indices are missing, set the
lbounds to one, as required by the standard.
* trans-intrinsic.c (conv_expr_ref_to_caf_ref): Pick up the
'token' offset from the field decl in the descriptor.
(conv_isocbinding_subroutine): Set the 'span' field.
* trans-io.c (gfc_trans_transfer): Always scalarize pointer
array io.
* trans-stmt.c (trans_associate_var): Set the 'span' field.
* trans-types.c (gfc_get_array_descriptor_base): Add the 'span'
field to the array descriptor.
(gfc_get_derived_type): Pointer array components are marked as
GFC_DECL_PTR_ARRAY_P.
(gfc_get_array_descr_info): Replaced API breaking code for
descriptor offset calling gfc_get_descriptor_offsets_for_info.
* trans.c (get_array_span): New function.
(gfc_build_array_ref): Simplify by calling get_array_span and
obtain 'span' if 'decl' or 'vptr' present.
* trans.h : Rename DECL_LANG_FLAG_6, GFC_DECL_SUBREF_ARRAY_P,
as GFC_DECL_PTR_ARRAY_P.
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
* gfortran.dg/associate_24.f90: New test.
* gfortran.dg/assumed_type_2.f90: Adjust some of the tree dump
checks.
* gfortran.dg/no_arg_check_2.f90: Likewise.
* gfortran.dg/pointer_array_1.f90: New test.
* gfortran.dg/pointer_array_2.f90: New test.
* gfortran.dg/pointer_array_7.f90: New test.
* gfortran.dg/pointer_array_8.f90: New test.
* gfortran.dg/pointer_array_component_1.f90: New test.
* gfortran.dg/pointer_array_component_2.f90: New test.
* gfortran.dg/goacc/kernels-alias-4.f95: Bump up both tree scan
counts by 1.
PR fortran/40737
* gfortran.dg/pointer_array_3.f90: New test.
PR fortran/57116
* gfortran.dg/pointer_array_4.f90: New test.
PR fortran/55763
* gfortran.dg/pointer_array_5.f90: New test.
PR fortran/57019
* gfortran.dg/pointer_array_6.f90: New test.
2017-09-10 Paul Thomas <pault@gcc.gnu.org>
PR fortran/34640
* libgfortran/libgfortran.h: Add span field to descriptor.
* libgfortran/libtool-version : Bump up version number to 5:0:0.
Added:
trunk/gcc/testsuite/gfortran.dg/associate_24.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_1.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_2.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_3.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_4.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_5.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_6.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_7.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_8.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_component_1.f90
trunk/gcc/testsuite/gfortran.dg/pointer_array_component_2.f90
Modified:
trunk/gcc/fortran/ChangeLog
trunk/gcc/fortran/expr.c
trunk/gcc/fortran/trans-array.c
trunk/gcc/fortran/trans-array.h
trunk/gcc/fortran/trans-decl.c
trunk/gcc/fortran/trans-expr.c
trunk/gcc/fortran/trans-intrinsic.c
trunk/gcc/fortran/trans-io.c
trunk/gcc/fortran/trans-stmt.c
trunk/gcc/fortran/trans-types.c
trunk/gcc/fortran/trans.c
trunk/gcc/fortran/trans.h
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gfortran.dg/assumed_type_2.f90
trunk/gcc/testsuite/gfortran.dg/goacc/kernels-alias-4.f95
trunk/gcc/testsuite/gfortran.dg/no_arg_check_2.f90
trunk/libgfortran/ChangeLog
trunk/libgfortran/libgfortran.h
trunk/libgfortran/libtool-version
>From gcc-bugs-return-574705-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 17:04:55 2017
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Subject: [Bug ada/79441] [7/8 regression] gnat.dg/pack9.adb fails
Date: Sun, 10 Sep 2017 17:04:00 -0000
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--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Sun Sep 10 17:04:19 2017
New Revision: 251951
URL: https://gcc.gnu.org/viewcvs?rev=251951&root=gcc&view=rev
Log:
PR ada/79441
* gnat.dg/pack9.adb: Robustify.
Modified:
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gnat.dg/pack9.adb
>From gcc-bugs-return-574704-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 17:04:17 2017
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Subject: [Bug ada/79441] [7/8 regression] gnat.dg/pack9.adb fails
Date: Sun, 10 Sep 2017 17:04:00 -0000
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--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Author: ebotcazou
Date: Sun Sep 10 17:03:40 2017
New Revision: 251950
URL: https://gcc.gnu.org/viewcvs?rev=251950&root=gcc&view=rev
Log:
PR ada/79441
* gnat.dg/pack9.adb: Robustify.
Modified:
branches/gcc-7-branch/gcc/testsuite/ChangeLog
branches/gcc-7-branch/gcc/testsuite/gnat.dg/pack9.adb
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Subject: [Bug ada/79441] [7/8 regression] gnat.dg/pack9.adb fails
Date: Sun, 10 Sep 2017 17:05:00 -0000
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Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
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--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
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Subject: [Bug fortran/39304] ICE with MATMUL, specific/generic functions and rank checking
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Bug 39304 depends on bug 34640, which changed state.
Bug 34640 Summary: ICE when assigning item of a derived-component to a pointer
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=34640
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Subject: [Bug fortran/32834] [Meta-bug] 'Fortran 95'-only failures
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Bug 32834 depends on bug 34640, which changed state.
Bug 34640 Summary: ICE when assigning item of a derived-component to a pointer
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=34640
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Subject: [Bug fortran/34640] ICE when assigning item of a derived-component to a pointer
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #36 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk.
Sorry that it has taken so long.
Paul
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Subject: [Bug fortran/56818] [meta-bug] fortran-dev bugs
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Bug 56818 depends on bug 34640, which changed state.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=34640
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Subject: [Bug fortran/40737] Pointer references sometimes fail to define "span" symbols
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #20 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk.
I am sorry that it has taken so long.
Thanks for the report.
Paul
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Bug 56818 depends on bug 40737, which changed state.
Bug 40737 Summary: Pointer references sometimes fail to define "span" symbols
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40737
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Subject: [Bug fortran/57019] [5/6/7/8 Regression] Compiler crashes (and make wrong assignments) at some combinations of pointers
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Paul Thomas <pault at gcc dot gnu.org> changed:
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--- Comment #15 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk.
I am sorry that it has taken so long.
Thanks for the report.
Paul
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Subject: [Bug fortran/55763] Issues with some simpler CLASS(*) programs
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--- Comment #26 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk.
I am sorry that it has taken so long.
Thanks for the report.
Paul
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Subject: [Bug fortran/57116] [OOP] ICE for pointer assignment inside SELECT TYPE
Date: Sun, 10 Sep 2017 17:17:00 -0000
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--- Comment #5 from Paul Thomas <pault at gcc dot gnu.org> ---
Fixed on trunk.
I am sorry that it has taken so long.
Thanks for the report.
Paul
>From gcc-bugs-return-574716-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 19:22:06 2017
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From: "physiker at toast2 dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/82168] New: Parameterized Derived Types, problems with default type parameters
Date: Sun, 10 Sep 2017 19:22:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82168
Bug ID: 82168
Summary: Parameterized Derived Types, problems with default
type parameters
Product: gcc
Version: 8.0
Status: UNCONFIRMED
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Priority: P3
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Assignee: unassigned at gcc dot gnu.org
Reporter: physiker at toast2 dot net
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The following code is rejected by gcc-8. According to page 258 of modern
fortran explained default type parameters are allowed. Therefore, I assume the
following code bug2.f90 ist legal.
cat bug2.f90
module mod
implicit none
integer, parameter :: dp = kind (0.0d0)
type, public :: v(z, k)
integer, len :: z
integer, kind :: k = kind(0.0)
real(kind = k) :: e(z)
end type v
end module mod
program bug
use mod
implicit none
type (v(2)) :: a
type (v(z=:, k=dp)), allocatable :: b
end program bug
LANG=C gfortran-8 -v -W -Wall bug2.f90
Driving: gfortran-8 -v -W -Wall bug2.f90 -mmacosx-version-min=10.11.6
-asm_macosx_version_min=10.11 -l gfortran -shared-libgcc
Using built-in specs.
COLLECT_GCC=gfortran-8
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-apple-darwin15.6.0/8.0.0/lto-wrapper
Target: x86_64-apple-darwin15.6.0
Configured with: ../gcc/configure --enable-languages=c,c++,fortran,lto
--with-gmp=/sw --with-libiconv-prefix=/sw --with-isl=/sw --with-mpc=/sw
--with-system-zlib --program-suffix=-8
Thread model: posix
gcc version 8.0.0 20170910 (experimental) [trunk revision 251945] (GCC)
COLLECT_GCC_OPTIONS='-v' '-Wextra' '-Wall' '-mmacosx-version-min=10.11.6'
'-asm_macosx_version_min=10.11' '-shared-libgcc' '-mtune=core2'
/usr/local/libexec/gcc/x86_64-apple-darwin15.6.0/8.0.0/f951 bug2.f90 -fPIC
-quiet -dumpbase bug2.f90 -mmacosx-version-min=10.11.6 -mtune=core2 -auxbase
bug2 -Wextra -Wall -version -fintrinsic-modules-path
/usr/local/lib/gcc/x86_64-apple-darwin15.6.0/8.0.0/finclude -o
/var/folders/97/4qnhjhtn25s86s9hkz0h37_m0000gn/T//cc0hzKu0.s
GNU Fortran (GCC) version 8.0.0 20170910 (experimental) [trunk revision 251945]
(x86_64-apple-darwin15.6.0)
compiled by GNU C version 8.0.0 20170910 (experimental) [trunk revision
251945], GMP version 6.1.2, MPFR version 3.1.5, MPC version 1.0.3, isl version
isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU Fortran2008 (GCC) version 8.0.0 20170910 (experimental) [trunk revision
251945] (x86_64-apple-darwin15.6.0)
compiled by GNU C version 8.0.0 20170910 (experimental) [trunk revision
251945], GMP version 6.1.2, MPFR version 3.1.5, MPC version 1.0.3, isl version
isl-0.16.1-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
bug2.f90:18:11:
type (v(2)) :: a
1
Error: The value for the KIND parameter ''k'' at (1) does not reduce to a
constant expression
bug2.f90:19:9:
type (v(z=:, k=dp)), allocatable :: b
1
Error: Syntax error in argument list at (1)
>From gcc-bugs-return-574717-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 19:56:35 2017
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From: "daniel.santos at pobox dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82169] New: Dynamically determine best strategy for -mcall-ms2sysv-xlogues
Date: Sun, 10 Sep 2017 19:56:00 -0000
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Bug ID: 82169
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-mcall-ms2sysv-xlogues
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Target: x86-64-*-*
The new -mcall-ms2sysv-xlogues is nice but it would be ideal for its use to be
determined automatically based upon optimization flags, profile-guided
optimizations, cold/hot markings, etc. I don't know that it is currently
possible or worthwhile, but an analysis using processor_costs or some such to
see it's faster than inline saves might also improve it.
Probably 9.0 would be a sane target release.
>From gcc-bugs-return-574718-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 19:57:49 2017
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Subject: [Bug target/82166] gcc ICE at -Os on valid code on x86_64-linux-gnu in "ix86_finalize_stack_frame_flags"
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--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 42146
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42146&action=edit
A patch
I am testing this.
>From gcc-bugs-return-574719-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 20:15:51 2017
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From: "daniel.santos at pobox dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82002] [8 Regression] ICE in sp_valid_at, at config/i386/i386.c:13233
Date: Sun, 10 Sep 2017 20:15:00 -0000
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--- Comment #4 from Daniel Santos <daniel.santos at pobox dot com> ---
Created attachment 42147
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42147&action=edit
incomplete patch set with test
(In reply to Jakub Jelinek from comment #3)
> Of course there is none. Which is why e.g. pro_epilogue_adjust_stack has
> code to handle the case when Pmode is not SImode and offset is not
> x86_64_immediate_operand. So whatever generated this insn also needs to
> test for sp + offset not being a valid address and load the offset into some
> hard register first and use sp + that_reg. pro_and_epilogue pass is after
> reload, so we can't wait for RA to handle it for us.
Thanks for the help here Jakub. Being new to gcc (and obviously the x86
backend), I'm learning about issues that weren't "on my radar", so sorry for
dragging you guys through some of this as well. This came about because I
moved the stack realignment boundary from the start of the function's frame to
after the GP reg saves so that we could use aligned MOVs for SSE regs. Prior
to this, we just used the frame pointer with possibly unaligned MOVs and that
offset was never very large.
The bad operand is being generated when ix86_emit_save_sse_regs_using_mov calls
choose_baseaddr. I wouldn't at all mind using the frame pointer with possibly
unaligned MOVs for a case like this, but I'm not sure what the best solution
is. This would mean that the realignment boundary
ix86_frame::stack_realign_offset could represent two different locations,
either after reg_save_offset or at stack_pointer_offset. This would require
adding an alternative calculation to the if (stack_realign_fp) else block in
ix86_compute_frame_layout (basically, readd the old way it was calculated), and
-ms2sysv-xlogues might have to either be disabled or modified since it uses
choose_baseaddr to init rax/rsi prior to calling the stub.
The alternative that I can see is to modify choose_baseaddr so that it can init
and utilize an auxiliary register (like r11). In this case, I'm thinking that
it might make sense to do something global to track what regs are available
rather than passing 'style' everywhere to know rather or not r11 is live and
also track auxiliary register(s) such as this so we can init it once and then
use it several times.
I know we're approaching the end of stage1, so don't want to shake things up
too much now. Please let me know what you think. I might post this to the
list for opinions too. I'm attaching what I have of the fix for this -- it
solves the problem that was posted, but it's still broken when we call a sysv
function from an ms function.
Thanks
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Subject: [Bug target/82002] [8 Regression] ICE in sp_valid_at, at config/i386/i386.c:13233
Date: Sun, 10 Sep 2017 20:25:00 -0000
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--- Comment #5 from Daniel Santos <daniel.santos at pobox dot com> ---
(In reply to Daniel Santos from comment #4)
> The alternative that I can see is to modify choose_baseaddr so that it can
> init and utilize an auxiliary register (like r11).
I guess this would be called a "scratch" register.
>From gcc-bugs-return-574721-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 21:10:15 2017
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Subject: [Bug target/80695] gratuitous use of stxvx to store multiple pointers
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--- Comment #7 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Sun Sep 10 21:09:38 2017
New Revision: 251952
URL: https://gcc.gnu.org/viewcvs?rev=251952&root=gcc&view=rev
Log:
[gcc]
2017-09-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-05-11 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/80695
* config/rs6000/rs6000.c (rs6000_builtin_vectorization_cost):
Account for direct move costs for vec_construct of integer
vectors.
Backport from mainline
2017-07-23 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/80695
* config/rs6000/rs6000.c (rs6000_builtin_vectorization_cost):
Reduce cost estimate for direct moves.
[gcc/testsuite]
2017-09-10 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2017-05-11 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/80695
* gcc.target/powerpc/pr80695-p8.c: New file.
* gcc.target/powerpc/pr80695-p9.c: New file.
Added:
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr80695-p8.c
branches/gcc-7-branch/gcc/testsuite/gcc.target/powerpc/pr80695-p9.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/config/rs6000/rs6000.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog
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From: "simon at pushface dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82141] [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Sun, 10 Sep 2017 21:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82141
simon at pushface dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |simon at pushface dot org
--- Comment #10 from simon at pushface dot org ---
(In reply to Eric Botcazou from comment #3)
> > For how long?
>
> Only God really knows I presume... You can try the latest iteration:
> https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00045.html
It’s out of my hands, of course, since I don’t have commit rights.
Perhaps I need to be more explicit in the title of the patch mail, to
attract the attention of knowledgable persons? e.g.
[PATCH] PR target/80556 bootstrap failure on Darwin
instead of just
[PATCH] PR target/80556
There are probably good reasons why that PR was labelled target/ -
shouldn’t it be bootstrap/ ?
Just for info, this bug is still present at r251951.
>From gcc-bugs-return-574723-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 22:16:27 2017
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From: "eggert at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82170] New: gcc optimizes int range-checking poorly on x86-64
Date: Sun, 10 Sep 2017 22:16:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82170
Bug ID: 82170
Summary: gcc optimizes int range-checking poorly on x86-64
Product: gcc
Version: 7.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
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Created attachment 42148
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42148&action=edit
source code that is poorly optimized on x86-64
GCC on Fedora 26 x86-64 (GCC 7.1.1 20170622 (Red Hat 7.1.1-3) generates
poorly-optimized machine instructions for C code that tests in the obvious way
whether a 'long long' fits in 'int'. If n is long long, the expression (INT_MIN
<= n && n <= INT_MAX) should generate code that is no worse than
(!__builtin_add_overflow_p (n, 0, 0)). However, with -O2 optimization before
the conditional branch, the former expression generates four instructions
containing two literal constants, whereas the latter generates just two
instructions that reference only registers.
For the code that prompted this bug report we will likely use an "#if __GNUC__
< 7" that uses __builtin_add_overflow_p for GCC 7 and later, and the portable
code otherwise. It'd be nicer, though, if we could just use the portable code.
See:
https://sourceware.org/ml/libc-alpha/2017-09/msg00411.html
Attached are a source program inrange.c and an assembly-language file inrange.s
produced by 'gcc -O2 -S' that illustrates the problem. Akthough the two
functions checked_arg_GCC7 and checked_arg_portable should have the same
machine code, the former is more efficient than the latter.
>From gcc-bugs-return-574724-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 22:17:03 2017
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Subject: [Bug target/82170] gcc optimizes int range-checking poorly on x86-64
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--- Comment #1 from Paul Eggert <eggert at gnu dot org> ---
Created attachment 42149
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42149&action=edit
assembly-language output for poorly-optimized code
>From gcc-bugs-return-574725-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sun Sep 10 23:29:27 2017
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From: "damian at sourceryinstitute dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/34640] ICE when assigning item of a derived-component to a pointer
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--- Comment #37 from Damian Rouson <damian at sourceryinstitute dot org> ---
Bravo!
>From gcc-bugs-return-574726-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 01:27:23 2017
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From: "rwdougla at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82171] New: Cant use std::declval in concept testing map operator[]
Date: Mon, 11 Sep 2017 01:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82171
Bug ID: 82171
Summary: Cant use std::declval in concept testing map
operator[]
Product: gcc
Version: 7.2.0
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static_assert fires inside c++/7.2.0/type_traits:2259:7
Godbolt link: https://godbolt.org/g/raan9j
Pasted here: (compiler flags are -std=c++1z -fconcepts)
#include <utility>
#include <type_traits>
#include <iterator>
template<typename T>
concept bool MapLike = requires(T t) {
{t[std::declval<typename T::value_type::first_type>()]}
-> typename T::value_type::second_type;
};
void test(MapLike T) {}
#include <map>
#include <vector>
int main() {
test(std::map<int, int>{});
//test(std::vector<std::pair<int, int>>{});
}
Workaround requires bankshot through nested requirement:
https://godbolt.org/g/j7kuKF
#include <utility>
#include <type_traits>
#include <iterator>
template<typename MapT, typename ValueT>
concept bool HasIndexOp = requires (MapT t, ValueT v) {
{ t[v] } -> typename MapT::value_type::second_type;
};
template<typename T>
concept bool MapLike = requires(T t) {
requires HasIndexOp<T, typename T::value_type::first_type>;
};
void test(MapLike T) {}
#include <map>
#include <vector>
int main() {
test(std::map<int, int>{});
//test(std::vector<std::pair<int, int>>{});
}
>From gcc-bugs-return-574727-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 01:31:03 2017
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From: "rwdougla at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82171] Cant use std::declval in concept testing map operator[]
Date: Mon, 11 Sep 2017 01:31:00 -0000
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--- Comment #1 from Robert Douglas <rwdougla at gmail dot com> ---
I came about this, transitioning from habits using SFINAE. I have just realized
I can simplify it to:
template<typename T>
concept bool MapLike = requires(T t) {
{t[typename T::value_type::first_type{}]}
-> typename T::value_type::second_type;
};
and bypass the declval, altogether. Question, though, does anything forbid
declval in this context?
>From gcc-bugs-return-574728-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 01:58:54 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82166] gcc ICE at -Os on valid code on x86_64-linux-gnu in "ix86_finalize_stack_frame_flags"
Date: Mon, 11 Sep 2017 01:58:00 -0000
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--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
A patch is posted at
https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00553.html
>From gcc-bugs-return-574729-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 04:24:40 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/34640] ICE when assigning item of a derived-component to a pointer
Date: Mon, 11 Sep 2017 04:24:00 -0000
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--- Comment #38 from Walter Spector <w6ws at earthlink dot net> ---
Paul,
THANK YOU!
>From gcc-bugs-return-574730-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 06:25:25 2017
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Subject: [Bug target/82170] gcc optimizes int range-checking poorly on x86-64
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--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
Note that n==(int)n (gcc documents that this must work) may work with more gcc
versions and is more readable.
>From gcc-bugs-return-574731-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 06:31:21 2017
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Subject: [Bug bootstrap/82141] [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Mon, 11 Sep 2017 06:31:00 -0000
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--- Comment #11 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
r251779 bootstraps with the patch, r251781 does not.
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Subject: [Bug c++/82172] New: Destruction of basic_string in basic_stringbuf::overflow with _GLIBCXX_USE_CXX11_ABI=0, -flto, and C++17 mode results in invalid delete
Date: Mon, 11 Sep 2017 06:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82172
Bug ID: 82172
Summary: Destruction of basic_string in
basic_stringbuf::overflow with
_GLIBCXX_USE_CXX11_ABI=0, -flto, and C++17 mode
results in invalid delete
Product: gcc
Version: 7.2.0
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Created attachment 42150
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Minimal test case
The following self-contained C++ results in an invalid free.
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Subject: [Bug target/82170] gcc optimizes int range-checking poorly on x86-64
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--- Comment #3 from Paul Eggert <eggert at gnu dot org> ---
(In reply to Marc Glisse from comment #2)
> Note that n==(int)n (gcc documents that this must work) may work with more
> gcc versions and is more readable.
Thanks, good point, I'll suggest switching to that in glibc, and will update
the attachements accordingly. Still, the point remains that the portable code
should compile to something just as efficient as 'n == (int) n', which is not
portable.
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Subject: [Bug c++/82172] Destruction of basic_string in basic_stringbuf::overflow with _GLIBCXX_USE_CXX11_ABI=0, -flto, and C++17 mode results in invalid delete
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--- Comment #1 from Shane <general+gcc at matley dot com.au> ---
Pressed submit accidentally. Sorry.
OS: Arch Linux
Compile flags: g++ -std=c++17 -O1 -D_GLIBCXX_USE_CXX11_ABI=0 -flto
./abi_crash.cpp
G++ version: $ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc-multilib/src/gcc/configure --prefix=/usr
--libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --enable-multilib --disable-werror
--enable-checking=release --enable-default-pie --enable-default-ssp
Thread model: posix
gcc version 7.2.0 (GCC)
Running the compiled code under valgrind results in:
valgrind ./a.out
==23743== Memcheck, a memory error detector
==23743== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==23743== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==23743== Command: ./a.out
==23743==
==23743== Invalid free() / delete / delete[] / realloc()
==23743== at 0x4C2E64B: operator delete(void*) (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==23743== by 0x4F02623: _M_dispose (basic_string.h:3155)
==23743== by 0x4F02623: ~basic_string (basic_string.h:3498)
==23743== by 0x4F02623: std::basic_stringbuf<char, std::char_traits<char>,
std::allocator<char> >::overflow(int) (sstream.tcc:113)
==23743== by 0x108C1C: main (in /var/tmp/a.out)
==23743== Address 0x30a0a0 is 0 bytes inside data symbol
"_ZNSs4_Rep20_S_empty_rep_storageE"
==23743==
{
<insert_a_suppression_name_here>
Memcheck:Free
fun:_ZdlPv
fun:_M_dispose
fun:~basic_string
fun:_ZNSt15basic_stringbufIcSt11char_traitsIcESaIcEE8overflowEi
fun:main
}
==23743==
==23743== HEAP SUMMARY:
==23743== in use at exit: 0 bytes in 0 blocks
==23743== total heap usage: 2 allocs, 3 frees, 73,241 bytes allocated
==23743==
==23743== All heap blocks were freed -- no leaks are possible
==23743==
==23743== For counts of detected and suppressed errors, rerun with: -v
==23743== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
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Subject: [Bug target/80556] [8 Regression] bootstrap failure for Ada compiler
Date: Mon, 11 Sep 2017 06:44:00 -0000
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--- Comment #48 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to simon from comment #46)
> I posted my darwin.h patch at
> https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00045.html on 1 September -
> hasn’t attracted any notice yet.
Thanks for the patch Simon, and apologies that no-one has reviewed it yet.
I am trying to catch up on the state of this (and other pending Darwin issues).
As it is, the patch needs some more work, since the unwinder needs to come from
different places in different versions of Darwin. As I read it, you've made
the change unconditional which will most likely break earlier Darwin versions.
Currently, I'm trying to reproduce the various issues, and will have some
suggestions for amendment of the patch once I can get Ada to bootstrap. Once
that's happening, I'll reply to the @patches post.
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Subject: [Bug c++/82172] Destruction of basic_string in basic_stringbuf::overflow with _GLIBCXX_USE_CXX11_ABI=0, -flto, and C++17 mode results in invalid delete
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--- Comment #2 from Shane <general+gcc at matley dot com.au> ---
Created attachment 42151
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preprocessed file that triggers the issue from -save-temps
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Subject: [Bug target/82170] gcc optimizes int range-checking poorly on x86-64
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Paul Eggert <eggert at gnu dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #42148|0 |1
is obsolete| |
--- Comment #4 from Paul Eggert <eggert at gnu dot org> ---
Created attachment 42152
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source code that is poorly optimized on x86-64, version 2
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Paul Eggert <eggert at gnu dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #42149|0 |1
is obsolete| |
--- Comment #5 from Paul Eggert <eggert at gnu dot org> ---
Created attachment 42153
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42153&action=edit
assembly-language output for poorly-optimized code, version 2
>From gcc-bugs-return-574738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 06:49:22 2017
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From: "general+gcc at matley dot com.au" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82172] Destruction of basic_string in basic_stringbuf::overflow with _GLIBCXX_USE_CXX11_ABI=0, -flto, and C++17 mode results in invalid delete
Date: Mon, 11 Sep 2017 06:49:00 -0000
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--- Comment #3 from Shane <general+gcc at matley dot com.au> ---
The problem disappears in the following cases:
- LTO is not enabled
- libstdc++ is statically linked
- If the C++11 ABI is used
- Lower optimisation level
- "Downgrade" to c++14 or c++11
>From gcc-bugs-return-574740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 06:53:00 2017
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Subject: [Bug c++/82172] Destruction of basic_string in basic_stringbuf::overflow with _GLIBCXX_USE_CXX11_ABI=0, -flto, and C++17 mode results in invalid delete
Date: Mon, 11 Sep 2017 06:53:00 -0000
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--- Comment #4 from Shane <general+gcc at matley dot com.au> ---
Backtrace from GDB:
Starting program: /var/tmp/a.out
*** Error in `/var/tmp/a.out': free(): invalid pointer: 0x00000001002020a0 ***
Program received signal SIGABRT, Aborted.
0x00007faabc0818a0 in raise () from /usr/lib/libc.so.6
(gdb) bt
#0 0x00007faabc0818a0 in raise () from /usr/lib/libc.so.6
#1 0x00007faabc082f09 in abort () from /usr/lib/libc.so.6
#2 0x00007faabc0c4517 in __libc_message () from /usr/lib/libc.so.6
#3 0x00007faabc0cac84 in malloc_printerr () from /usr/lib/libc.so.6
#4 0x00007faabc0cc599 in _int_free () from /usr/lib/libc.so.6
#5 0x00007faabca30624 in std::string::_Rep::_M_dispose (__a=...,
this=<optimized out>) at
/build/gcc-multilib/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:3155
#6 std::basic_string<char, std::char_traits<char>, std::allocator<char>
>::~basic_string (this=0x7fffffffbdb0, __in_chrg=<optimized out>) at
/build/gcc-multilib/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_string.h:3498
#7 std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char>
>::overflow (this=0x7fffffffbe00, __c=97) at
/build/gcc-multilib/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/sstream.tcc:113
#8 0x0000000100000c1d in main ()
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Subject: [Bug c++/82164] AddressSanitizer: stack-buffer-overflow while constructing std::regex
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Can't reproduce, please provide ulimit -s? Do you have just empty main function
for the attached test-case? Or do you have a more sophisticated test-case?
>From gcc-bugs-return-574742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 06:55:59 2017
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Subject: [Bug tree-optimization/82163] [8 Regression] ICE on valid code at -O3 on x86_64-linux-gnu: in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:707
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
CC| |amker at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Target Milestone|--- |8.0
Summary|ICE on valid code at -O3 on |[8 Regression] ICE on valid
|x86_64-linux-gnu: in |code at -O3 on
|check_loop_closed_ssa_use, |x86_64-linux-gnu: in
|at |check_loop_closed_ssa_use,
|tree-ssa-loop-manip.c:707 |at
| |tree-ssa-loop-manip.c:707
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r250669.
>From gcc-bugs-return-574743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:00:44 2017
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Subject: [Bug target/82162] Internal compiler error in Raspbian
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Please try newer GCC, 4.9 is out of support.
>From gcc-bugs-return-574744-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:06:08 2017
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Subject: [Bug c++/82159] [6/7/8 Regression] ICE: in assign_temp, at function.c:961
Date: Mon, 11 Sep 2017 07:06:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Target Milestone|--- |6.5
Summary|ICE: in assign_temp, at |[6/7/8 Regression] ICE: in
|function.c:961 |assign_temp, at
| |function.c:961
Ever confirmed|0 |1
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r232167. It's probably a valid code.
>From gcc-bugs-return-574745-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:09:15 2017
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Subject: [Bug debug/82155] [7/8 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:21655
Date: Mon, 11 Sep 2017 07:09:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
CC| |marxin at gcc dot gnu.org,
| |pmderodat at gcc dot gnu.org
Target Milestone|--- |7.3
Summary|gcc-8 ICE in |[7/8 Regression] ICE in
|dwarf2out_abstract_function |dwarf2out_abstract_function
|, at dwarf2out.c:21655 |, at dwarf2out.c:21655
Ever confirmed|0 |1
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with r242035
>From gcc-bugs-return-574746-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:14:18 2017
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Subject: [Bug c++/82154] ICE in fold_binary_loc, at fold-const.c:9088 in 32-bit mingw32
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-09-11
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Please attach pre-processed source code so that I can test it with cross
compiler.
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Subject: [Bug debug/82155] [7/8 Regression] ICE in dwarf2out_abstract_function, at dwarf2out.c:21655
Date: Mon, 11 Sep 2017 07:15:00 -0000
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Pierre-Marie de Rodat <derodat at adacore dot com> changed:
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--- Comment #3 from Pierre-Marie de Rodat <derodat at adacore dot com> ---
Thank you for reporting this. I’m having a look.
>From gcc-bugs-return-574747-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:15:06 2017
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Subject: [Bug c++/82152] [7/8 Regression] ICE on invalid code in C++17 mode if inheriting constructors are used
Date: Mon, 11 Sep 2017 07:15:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-invalid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Target Milestone|--- |7.3
Summary|ICE on invalid code in |[7/8 Regression] ICE on
|C++17 mode if inheriting |invalid code in C++17 mode
|constructors are used |if inheriting constructors
| |are used
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r240802.
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Subject: [Bug c++/82148] [7/8 Regression] ICE in assign_temp, at function.c:968
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
CC| |jason at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Target Milestone|--- |7.3
Summary|ICE in assign_temp, at |[7/8 Regression] ICE in
|function.c:968 |assign_temp, at
| |function.c:968
Ever confirmed|0 |1
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, started with r240889.
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Subject: [Bug testsuite/82114] gcc.dg/gimplefe-14.c for bare metal and argc is 0
Date: Mon, 11 Sep 2017 07:40:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
CC| |marxin at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Will fix that.
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Subject: [Bug target/82104] __stack_chk_fail should not use lazy binding on ELF
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
CC| |jakub at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Adding the attribute is quite simple, but I can't verify the request. Jakub?
>From gcc-bugs-return-574752-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:56:51 2017
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Subject: [Bug tree-optimization/59859] [meta-bug] GRAPHITE issues
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Bug 59859 depends on bug 80069, which changed state.
Bug 80069 Summary: ICE at graphite-sese-to-poly.c:1176
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80069
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
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Subject: [Bug other/80069] ICE at graphite-sese-to-poly.c:1176
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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CC| |marxin at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
Started with the same revision as PR69728, thus dup.
*** This bug has been marked as a duplicate of bug 69728 ***
>From gcc-bugs-return-574753-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:56:52 2017
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Subject: [Bug tree-optimization/69728] [6/7/8 Regression] internal compiler error: in outer_projection_mupa, at graphite-sese-to-poly.c:1175
Date: Mon, 11 Sep 2017 07:56:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |manuel.lauss at googlemail dot com
--- Comment #10 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 80069 has been marked as a duplicate of this bug. ***
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Subject: [Bug tree-optimization/69728] [6/7/8 Regression] internal compiler error: in outer_projection_mupa, at graphite-sese-to-poly.c:1175
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69728
Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |sven.c.dack at sky dot com
--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 82057 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-574755-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:58:14 2017
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Subject: [Bug tree-optimization/81226] [6/7/8 Regression] Graphite ICE in outer_projection_mupa, at graphite-sese-to-poly.c:1019
Date: Mon, 11 Sep 2017 07:58:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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Resolution|--- |DUPLICATE
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 69728 ***
>From gcc-bugs-return-574758-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:58:26 2017
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Subject: [Bug tree-optimization/82057] ICE with -fgraphite-identity
Date: Mon, 11 Sep 2017 07:58:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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CC| |marxin at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Dup.
*** This bug has been marked as a duplicate of bug 69728 ***
>From gcc-bugs-return-574756-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:58:16 2017
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Subject: [Bug tree-optimization/69728] [6/7/8 Regression] internal compiler error: in outer_projection_mupa, at graphite-sese-to-poly.c:1175
Date: Mon, 11 Sep 2017 07:58:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
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CC| |marxin at gcc dot gnu.org
--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> ---
*** Bug 81226 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-574760-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:58:26 2017
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Subject: [Bug tree-optimization/59859] [meta-bug] GRAPHITE issues
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59859
Bug 59859 depends on bug 82057, which changed state.
Bug 82057 Summary: ICE with -fgraphite-identity
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82057
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----------------------------------------------------------------------------
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Resolution|--- |DUPLICATE
>From gcc-bugs-return-574757-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 07:58:17 2017
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59859
Bug 59859 depends on bug 81226, which changed state.
Bug 81226 Summary: [6/7/8 Regression] Graphite ICE in outer_projection_mupa, at graphite-sese-to-poly.c:1019
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81226
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>From gcc-bugs-return-574761-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 08:17:47 2017
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From: "mateuszb at poczta dot onet.pl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/82154] ICE in fold_binary_loc, at fold-const.c:9088 in 32-bit mingw32
Date: Mon, 11 Sep 2017 08:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82154
--- Comment #2 from mateuszb at poczta dot onet.pl ---
W dniu 2017-09-11 o 09:14, marxin at gcc dot gnu.org pisze:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82154
>
> Martin Liška <marxin at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> Status|UNCONFIRMED |WAITING
> Last reconfirmed| |2017-09-11
> CC| |marxin at gcc dot gnu.org
> Ever confirmed|0 |1
>
> --- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
> Please attach pre-processed source code so that I can test it with cross
> compiler.
>
Cmd line:
ma@ma-VirtualBox:~/m$ /home/ma/m/build/bc_gcc/./gcc/xgcc -shared-libgcc
-B/home/ma/m/build/bc_gcc/./gcc -nostdinc++
-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/src
-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/src/.libs
-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs
-L/home/ma/m/cross/i686-w64-mingw32/lib -L/home/ma/m/cross/mingw/lib -isystem
/home/ma/m/cross/i686-w64-mingw32/include -isystem
/home/ma/m/cross/mingw/include -B/home/ma/m/cross/i686-w64-mingw32/bin/
-B/home/ma/m/cross/i686-w64-mingw32/lib/ -isystem
/home/ma/m/cross/i686-w64-mingw32/include -isystem
/home/ma/m/cross/i686-w64-mingw32/sys-include
-I/home/ma/m/source/gcc-8/libstdc++-v3/../libgcc
-I/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/i686-w64-mingw32
-I/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include
-I/home/ma/m/source/gcc-8/libstdc++-v3/libsupc++ -std=gnu++98
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi
-fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=bitmap_allocator.lo -v -save-temps -g -O2 -c
/home/ma/m/source/gcc-8/libstdc++-v3/src/c++98/bitmap_allocator.cc -o
bitmap_allocator.o
Reading specs from /home/ma/m/build/bc_gcc/./gcc/specs
COLLECT_GCC=/home/ma/m/build/bc_gcc/./gcc/xgcc
Target: i686-w64-mingw32
Configured with: /home/ma/m/source/gcc-8/configure --target=i686-w64-mingw32
--disable-nls --disable-multilib --with-gmp=/home/ma/m/build/for_cross
--with-mpfr=/home/ma/m/build/for_cross --with-mpc=/home/ma/m/build/for_cross
--with-isl=/home/ma/m/build/for_cross --enable-languages=c,c++,objc,obj-c++
--disable-libstdcxx-pch --disable-shared --enable-fully-dynamic-string
--prefix=/home/ma/m/cross --with-sysroot=/home/ma/m/cross
Thread model: win32
gcc version 8.0.0 20170911 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-shared-libgcc' '-B' '/home/ma/m/build/bc_gcc/./gcc'
'-nostdinc++' '-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/src'
'-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/src/.libs'
'-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs'
'-L/home/ma/m/cross/i686-w64-mingw32/lib' '-L/home/ma/m/cross/mingw/lib'
'-isystem' '/home/ma/m/cross/i686-w64-mingw32/include' '-isystem'
'/home/ma/m/cross/mingw/include' '-B' '/home/ma/m/cross/i686-w64-mingw32/bin/'
'-B' '/home/ma/m/cross/i686-w64-mingw32/lib/' '-isystem'
'/home/ma/m/cross/i686-w64-mingw32/include' '-isystem'
'/home/ma/m/cross/i686-w64-mingw32/sys-include' '-I'
'/home/ma/m/source/gcc-8/libstdc++-v3/../libgcc' '-I'
'/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/i686-w64-mingw32'
'-I' '/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include' '-I'
'/home/ma/m/source/gcc-8/libstdc++-v3/libsupc++' '-std=gnu++98'
'-fno-implicit-templates' '-Wall' '-Wextra' '-Wwrite-strings' '-Wcast-qual'
'-Wabi' '-fdiagnostics-show-location=once' '-ffunction-sections'
'-fdata-sections' '-frandom-seed=bitmap_allocator.lo' '-v' '-save-temps' '-g'
'-O2' '-c' '-o' 'bitmap_allocator.o' '-mtune=generic' '-march=pentiumpro'
/home/ma/m/build/bc_gcc/./gcc/cc1plus -E -quiet -nostdinc++ -v -I
/home/ma/m/source/gcc-8/libstdc++-v3/../libgcc -I
/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/i686-w64-mingw32
-I /home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include -I
/home/ma/m/source/gcc-8/libstdc++-v3/libsupc++ -iprefix
/home/ma/m/build/bc_gcc/gcc/../lib/gcc/i686-w64-mingw32/8.0.0/ -isystem
/home/ma/m/build/bc_gcc/./gcc/include -isystem
/home/ma/m/build/bc_gcc/./gcc/include-fixed -U_REENTRANT -isystem
/home/ma/m/cross/i686-w64-mingw32/include -isystem
/home/ma/m/cross/mingw/include -isystem
/home/ma/m/cross/i686-w64-mingw32/include -isystem
/home/ma/m/cross/i686-w64-mingw32/sys-include
/home/ma/m/source/gcc-8/libstdc++-v3/src/c++98/bitmap_allocator.cc
-mtune=generic -march=pentiumpro -std=gnu++98 -Wall -Wextra -Wwrite-strings
-Wcast-qual -Wabi -fno-implicit-templates -fdiagnostics-show-location=once
-ffunction-sections -fdata-sections -frandom-seed=bitmap_allocator.lo -g
-fworking-directory -O2 -fpch-preprocess -o bitmap_allocator.ii
ignoring duplicate directory "/home/ma/m/cross/mingw/include"
ignoring duplicate directory "/home/ma/m/cross/i686-w64-mingw32/include"
ignoring nonexistent directory "/home/ma/m/cross/i686-w64-mingw32/sys-include"
ignoring nonexistent directory
"/home/ma/m/build/bc_gcc/gcc/../lib/gcc/i686-w64-mingw32/8.0.0/include"
ignoring nonexistent directory
"/home/ma/m/build/bc_gcc/gcc/../lib/gcc/i686-w64-mingw32/8.0.0/include-fixed"
ignoring nonexistent directory
"/home/ma/m/build/bc_gcc/gcc/../lib/gcc/i686-w64-mingw32/8.0.0/../../../../i686-w64-mingw32/include"
ignoring nonexistent directory
"/home/ma/m/build/bc_gcc/gcc/../lib/gcc/../../lib/gcc/i686-w64-mingw32/8.0.0/include"
ignoring nonexistent directory "/home/ma/m/cross/usr/local/include"
ignoring nonexistent directory
"/home/ma/m/build/bc_gcc/gcc/../lib/gcc/../../lib/gcc/i686-w64-mingw32/8.0.0/include-fixed"
ignoring nonexistent directory
"/home/ma/m/build/bc_gcc/gcc/../lib/gcc/../../lib/gcc/i686-w64-mingw32/8.0.0/../../../../i686-w64-mingw32/include"
ignoring duplicate directory "/home/ma/m/cross/mingw/include"
#include "..." search starts here:
#include <...> search starts here:
/home/ma/m/source/gcc-8/libstdc++-v3/../libgcc
/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/i686-w64-mingw32
/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include
/home/ma/m/source/gcc-8/libstdc++-v3/libsupc++
/home/ma/m/build/bc_gcc/./gcc/include
/home/ma/m/build/bc_gcc/./gcc/include-fixed
/home/ma/m/cross/i686-w64-mingw32/include
End of search list.
COLLECT_GCC_OPTIONS='-shared-libgcc' '-B' '/home/ma/m/build/bc_gcc/./gcc'
'-nostdinc++' '-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/src'
'-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/src/.libs'
'-L/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/libsupc++/.libs'
'-L/home/ma/m/cross/i686-w64-mingw32/lib' '-L/home/ma/m/cross/mingw/lib'
'-isystem' '/home/ma/m/cross/i686-w64-mingw32/include' '-isystem'
'/home/ma/m/cross/mingw/include' '-B' '/home/ma/m/cross/i686-w64-mingw32/bin/'
'-B' '/home/ma/m/cross/i686-w64-mingw32/lib/' '-isystem'
'/home/ma/m/cross/i686-w64-mingw32/include' '-isystem'
'/home/ma/m/cross/i686-w64-mingw32/sys-include' '-I'
'/home/ma/m/source/gcc-8/libstdc++-v3/../libgcc' '-I'
'/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/i686-w64-mingw32'
'-I' '/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include' '-I'
'/home/ma/m/source/gcc-8/libstdc++-v3/libsupc++' '-std=gnu++98'
'-fno-implicit-templates' '-Wall' '-Wextra' '-Wwrite-strings' '-Wcast-qual'
'-Wabi' '-fdiagnostics-show-location=once' '-ffunction-sections'
'-fdata-sections' '-frandom-seed=bitmap_allocator.lo' '-v' '-save-temps' '-g'
'-O2' '-c' '-o' 'bitmap_allocator.o' '-mtune=generic' '-march=pentiumpro'
/home/ma/m/build/bc_gcc/./gcc/cc1plus -fpreprocessed bitmap_allocator.ii
-quiet -dumpbase bitmap_allocator.cc -mtune=generic -march=pentiumpro
-auxbase-strip bitmap_allocator.o -g -O2 -Wall -Wextra -Wwrite-strings
-Wcast-qual -Wabi -std=gnu++98 -version -fno-implicit-templates
-fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=bitmap_allocator.lo -o bitmap_allocator.s
GNU C++98 (GCC) version 8.0.0 20170911 (experimental) (i686-w64-mingw32)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.2, MPFR
version 3.1.6, MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
GNU C++98 (GCC) version 8.0.0 20170911 (experimental) (i686-w64-mingw32)
compiled by GNU C version 5.4.0 20160609, GMP version 6.1.2, MPFR
version 3.1.6, MPC version 1.0.3, isl version isl-0.18-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 0a6ec8ede64bc633e39e8aa3515903d8
during RTL pass: expand
In file included from
/home/ma/m/source/gcc-8/libstdc++-v3/src/c++98/bitmap_allocator.cc:25:0:
/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/ext/bitmap_allocator.h:
In member function 'void
__gnu_cxx::bitmap_allocator<_Tp>::_M_deallocate_single_object(__gnu_cxx::bitmap_allocator<_Tp>::pointer)
[with _Tp = char]':
/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/ext/bitmap_allocator.h:996:7:
internal compiler error: in fold_binary_loc, at fold-const.c:9088
}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
*.ii file attached
Cmd line to reproduce:
ma@ma-VirtualBox:~/m$ /home/ma/m/build/bc_gcc/./gcc/xgcc -shared-libgcc
-B/home/ma/m/build/bc_gcc/./gcc -g -O2 -c bitmap_allocator.ii
/home/ma/m/source/gcc-8/libstdc++-v3/src/c++98/bitmap_allocator.cc:49:23:
warning: dynamic exception specifications are deprecated in C++11
[-Wdeprecated]
_M_get(size_t __sz) throw(std::bad_alloc)
^~~~~
during RTL pass: expand
In file included from
/home/ma/m/source/gcc-8/libstdc++-v3/src/c++98/bitmap_allocator.cc:25:0:
/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/ext/bitmap_allocator.h:
In member function 'void
__gnu_cxx::bitmap_allocator<_Tp>::_M_deallocate_single_object(__gnu_cxx::bitmap_allocator<_Tp>::pointer)
[with _Tp = char]':
/home/ma/m/build/bc_gcc/i686-w64-mingw32/libstdc++-v3/include/ext/bitmap_allocator.h:996:7:
internal compiler error: in fold_binary_loc, at fold-const.c:9088
}
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
>From gcc-bugs-return-574762-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 08:39:31 2017
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Subject: [Bug fortran/82173] New: [meta-bug] Parameterized derived type errors
Date: Mon, 11 Sep 2017 08:39:00 -0000
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Bug ID: 82173
Summary: [meta-bug] Parameterized derived type errors
Product: gcc
Version: unknown
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A PDT meta-bug to make them easier to find.
>From gcc-bugs-return-574763-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 08:41:05 2017
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Subject: [Bug fortran/82173] [meta-bug] Parameterized derived type errors
Date: Mon, 11 Sep 2017 08:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82173
Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
Version|unknown |8.0
Depends on| |82168
Ever confirmed|0 |1
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82168
[Bug 82168] Parameterized Derived Types, problems with default type parameters
>From gcc-bugs-return-574764-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 08:52:54 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/82044] runtime signed integer overflow in check_mem_read_rtx() and all_positions_needed_p() in dse.c
Date: Mon, 11 Sep 2017 08:52:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
CC| |marxin at gcc dot gnu.org
Component|middle-end |rtl-optimization
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
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--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got patch for that.
>From gcc-bugs-return-574765-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 08:57:14 2017
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From: "mcree at orcon dot net.nz" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug jit/82174] New: Null name in one entry of the builtin_data array of jit-builtins.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82174
Bug ID: 82174
Summary: Null name in one entry of the builtin_data array of
jit-builtins.c
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: jit
Assignee: dmalcolm at gcc dot gnu.org
Reporter: mcree at orcon dot net.nz
Target Milestone: ---
I see a segmentation violation in some code calling libgccjit. The backtrace
is:
Program terminated with signal SIGSEGV, Segmentation fault.
#0 pp_format(pretty_printer*, text_info*) () at
../../gcc.git/gcc/pretty-print.c:317
317 output_buffer *buffer = pp_buffer (pp);
(gdb) bt
#0 pp_format(pretty_printer*, text_info*) () at
../../gcc.git/gcc/pretty-print.c:317
#1 0x00007fef3c1fc698 in diagnostic_report_diagnostic(diagnostic_context*,
diagnostic_info*) ()
at ../../gcc.git/gcc/diagnostic.c:974
#2 0x00007fef3c1fc99e in diagnostic_impl
(richloc=richloc@entry=0x7fff20ffec20, opt=opt@entry=-1,
gmsgid=gmsgid@entry=0x7fef3c6e88d7 "in %s, at %s:%d",
ap=ap@entry=0x7fff20ffec08,
kind=kind@entry=DK_ICE) at ../../gcc.git/gcc/diagnostic.c:1099
#3 0x00007fef3c1fd63d in internal_error (gmsgid=gmsgid@entry=0x7fef3c6e88d7
"in %s, at %s:%d")
at ../../gcc.git/gcc/diagnostic.c:1422
#4 0x00007fef3b631a49 in fancy_abort (
file=file@entry=0x7fef3c29aea0 "../../gcc.git/gcc/jit/jit-builtins.c",
line=line@entry=71,
function=function@entry=0x7fef3c29ec80 <gcc::jit::matches_builtin(char
const*, gcc::jit::builtin_data const&)::__FUNCTION__> "matches_builtin") at
../../gcc.git/gcc/diagnostic.c:1488
#5 0x00007fef3b38c6d8 in gcc::jit::matches_builtin (bd=..., bd=...,
in_name=0x434b21 "__builtin_ia32_orps256") at
../../gcc.git/gcc/jit/jit-builtins.c:71
#6 gcc::jit::find_builtin_by_name (out_id=<synthetic pointer>,
in_name=0x434b21 "__builtin_ia32_orps256")
at ../../gcc.git/gcc/jit/jit-builtins.c:118
#7 gcc::jit::builtins_manager::get_builtin_function (this=0x2619850,
name=0x434b21 "__builtin_ia32_orps256") at
../../gcc.git/gcc/jit/jit-builtins.c:150
#8 0x00007fef3b644019 in gcc_jit_context_get_builtin_function (ctxt=0x25d2ac0,
name=name@entry=0x434b21 "__builtin_ia32_orps256") at
../../gcc.git/gcc/jit/libgccjit.c:917
#9 0x0000000000417bfd in ip_be_avx2_fdecls (be=be@entry=0x643820 <ip_avx2>) at
intel-avx2.c:201
#10 0x00000000004143d7 in ip_init_jit () at jit.c:892
#11 0x000000000040a0ac in time_ip_init_jit () at arith-test.c:231
#12 run_im_ii_tests (operator=operator@entry=0, size=size@entry=...,
chk_flag=112) at arith-test.c:505
#13 0x000000000040594a in main (argc=<optimized out>, argv=<optimized out>) at
arith-test.c:616
Stepping up to #6 find_builtin_by_name() finds that the loop counter i is:
(gdb) print i
$2 = 1092
but the entries about i in the builtin_data array are:
(gdb) print builtin_data[1091]
$5 = {name = 0x7fef3c2a3964 "__builtin__ITM_RfWE", fnclass = BUILT_IN_NORMAL,
type = gcc::jit::BT_FN_LDOUBLE_VPTR, both_p = false, fallback_p = true,
attr = gcc::jit::ATTR_TM_PURE_TMPURE_NOTHROW_LIST, implicit_p = false}
(gdb) print builtin_data[1092]
$6 = {name = 0x0, fnclass = BUILT_IN_NORMAL, type = gcc::jit::BT_LAST, both_p =
false, fallback_p = false,
attr = gcc::jit::ATTR_LAST, implicit_p = false}
(gdb) print builtin_data[1093]
$7 = {name = 0x7fef3c2a3978 "__builtin___asan_init", fnclass = BUILT_IN_NORMAL,
type = gcc::jit::BT_FN_VOID, both_p = true, fallback_p = true, attr =
gcc::jit::ATTR_NOTHROW_LEAF_LIST,
implicit_p = true}
and it's clear that the name in entry 1092 is NULL, which eventually leads to a
failed insert and the segfault. The size of the array is 46752 and each entry
has 32 bytes thus the code is expecting 1461 entries in the array.
>From gcc-bugs-return-574766-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 09:00:48 2017
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/82168] Parameterized Derived Types, problems with default type parameters
Date: Mon, 11 Sep 2017 09:00:00 -0000
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Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2017-09-11
CC| |pault at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Confirmed. Is the code valid?
module mod
implicit none
integer, parameter :: dp = kind (0.0d0)
type, public :: v(z, k)
integer, len :: z
integer, kind :: k
real(kind = k) :: e(z)
end type v
end module mod
program bug
use mod
implicit none
type (v(2,dp)) :: a
a%e = 1.0
print *, a%e
end program bug
prints
1.0000000000000000 1.0000000000000000
>From gcc-bugs-return-574767-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 09:06:03 2017
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From: "andrewm.roberts at sky dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/82175] New: -march=native fails on armv7 big/little system armv7l-unknown-linux-gnueabihf with gcc 8.0.0
Date: Mon, 11 Sep 2017 09:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82175
Bug ID: 82175
Summary: -march=native fails on armv7 big/little system
armv7l-unknown-linux-gnueabihf with gcc 8.0.0
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: andrewm.roberts at sky dot com
Target Milestone: ---
gcc-7.2.0 is ok on this target, but gcc-8.0.0 fails to detect native target.
cat > test.c
#include <stdio.h>
int main(void)
{
printf("Hello World\n");
return 0;
}
^D
/usr/local/gcc-8.0.0/bin/gcc -march=native -o test800 test.c
gcc: error: unrecognized -march target: native
gcc: note: valid arguments are: armv2 armv2a armv3 armv3m armv4 armv4t armv5
armv5t armv5e armv5te armv5tej armv6 armv6j armv6k armv6z armv6kz armv6zk
armv6t2 armv6-m armv6s-m armv7 armv7-a armv7ve armv7-r armv7-m armv7e-m armv8-a
armv8.1-a armv8.2-a armv8-m.base armv8-m.main armv8-r iwmmxt iwmmxt2
gcc: error: unrecognized -march target: native
gcc: note: valid arguments are: armv2 armv2a armv3 armv3m armv4 armv4t armv5
armv5t armv5e armv5te armv5tej armv6 armv6j armv6k armv6z armv6kz armv6zk
armv6t2 armv6-m armv6s-m armv7 armv7-a armv7ve armv7-r armv7-m armv7e-m armv8-a
armv8.1-a armv8.2-a armv8-m.base armv8-m.main armv8-r iwmmxt iwmmxt2
gcc: error: missing argument to ‘-march=’
But --help=target gives a result, but seems to use armv8 syntax.
/usr/local/gcc-8.0.0/bin/gcc -Q --help=target |& grep march
-march= armv7-a+fp
gcc-7.2.0 gives:
/usr/local/gcc-7.2.0/bin/gcc -Q --help=target |& grep march
-march= armv7-a
Both versions of gcc configured identically apart from --prefix=
/usr/local/gcc-8.0.0/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/usr/local/gcc-8.0.0/bin/gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc-8.0.0/libexec/gcc/armv7l-unknown-linux-gnueab
ihf/8.0.0/lto-wrapper
Target: armv7l-unknown-linux-gnueabihf
Configured with: ../gcc-8.0.0/configure --prefix=/usr/local/gcc-8.0.0
--program-
suffix= --disable-werror --enable-shared --enable-threads=posix
--enable-checkin
g=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exception
s --enable-gnu-unique-object --enable-linker-build-id
--with-linker-hash-style=g
nu --enable-plugin --enable-gnu-indirect-function --enable-lto --with-isl
--enab
le-languages=c,c++,fortran,lto --disable-libgcj --enable-clocale=gnu
--disable-l
ibstdcxx-pch --enable-install-libiberty --disable-multilib --disable-libssp
--en
able-default-pie --enable-default-ssp --host=armv7l-unknown-linux-gnueabihf
--bu
ild=armv7l-unknown-linux-gnueabihf --with-arch=armv7-a --with-float=hard
--with-
fpu=vfpv3-d16 --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20170910 (experimental) (GCC)
Target/Host system is a ODroid-XU4 with 8 cores:
Cores 0..3: ARM Cortex-A7 rev 3 (0x4100c070)
Cores 4..7: ARM Cortex-A15 rev 3 (0x4100c0f0)
cat /proc/cpuinfo
processor : 0
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 18.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt
vfpd32 lpae evtstrm
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xc07
CPU revision : 3
...
processor : 4
model name : ARMv7 Processor rev 3 (v7l)
BogoMIPS : 18.00
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt
vfpd32 lpae evtstrm
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x2
CPU part : 0xc0f
CPU revision : 3
...
>From gcc-bugs-return-574768-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 09:10:03 2017
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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug hsa/82119] Revision 251264 caused a number of run-time HSA failures
Date: Mon, 11 Sep 2017 09:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82119
--- Comment #2 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Author: jamborm
Date: Mon Sep 11 09:09:26 2017
New Revision: 251964
URL: https://gcc.gnu.org/viewcvs?rev=251964&root=gcc&view=rev
Log:
Make HSA resilient to side-effects of split_edge
2017-09-11 Martin Jambor <mjambor@suse.cz>
PR hsa/82119
* hsa-gen.c (gen_hsa_phi_from_gimple_phi): Process ADDR_EXPRs in
arguments in advance.
* hsa-regalloc.c (naive_process_phi): New parameter predecessors,
use it to find predecessor edges.
(naive_outof_ssa): Collect vector of predecessors.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/hsa-gen.c
trunk/gcc/hsa-regalloc.c
>From gcc-bugs-return-574769-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 09:18:01 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug hsa/82119] Revision 251264 caused a number of run-time HSA failures
Date: Mon, 11 Sep 2017 09:18:00 -0000
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Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Fixed.
>From gcc-bugs-return-574770-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 09:21:03 2017
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/82042] signed integer overflow in ao_ref_init_from_ptr_and_size
Date: Mon, 11 Sep 2017 09:21:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
CC| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Confirmed, I've got patch for 3/4 of ubsan errors.
The only one which is remaining is:
679 void
680 ao_ref_init_from_ptr_and_size (ao_ref *ref, tree ptr, tree size)
681 {
682 HOST_WIDE_INT t, size_hwi, extra_offset = 0;
683 ref->ref = NULL_TREE;
684 if (TREE_CODE (ptr) == SSA_NAME)
685 {
686 gimple *stmt = SSA_NAME_DEF_STMT (ptr);
687 if (gimple_assign_single_p (stmt)
688 && gimple_assign_rhs_code (stmt) == ADDR_EXPR)
689 ptr = gimple_assign_rhs1 (stmt);
690 else if (is_gimple_assign (stmt)
691 && gimple_assign_rhs_code (stmt) == POINTER_PLUS_EXPR
692 && TREE_CODE (gimple_assign_rhs2 (stmt)) == INTEGER_CST)
693 {
694 ptr = gimple_assign_rhs1 (stmt);
695 extra_offset = BITS_PER_UNIT
696 * int_cst_value (gimple_assign_rhs2 (stmt));
697 }
698 }
699
700 if (TREE_CODE (ptr) == ADDR_EXPR)
701 {
702 ref->base = get_addr_base_and_unit_offset (TREE_OPERAND (ptr, 0),
&t);
703 if (ref->base)
704 ref->offset = BITS_PER_UNIT * t;
705 else
Where offset should be probably offset_int type, which is not for free.
Or do we have a special value for such case Richi?
>From gcc-bugs-return-574771-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 09:27:48 2017
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From: "andrewm.roberts at sky dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/82175] -march=native fails on armv7 big/little system armv7l-unknown-linux-gnueabihf with gcc 8.0.0
Date: Mon, 11 Sep 2017 09:27:00 -0000
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--- Comment #1 from Andrew Roberts <andrewm.roberts at sky dot com> ---
This also fails on a Raspberry PI 3 running armv7 in the same way.
Looks like the armv8 code has got mixed up with the armv7 code...
The RPI3 has:
4x ARM Cortex-A53 rev 4 (0x4100d030)
cat /proc/cpuinfo
processor : 0
model name : ARMv7 Processor rev 4 (v7l)
BogoMIPS : 38.40
Features : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt
vfpd32 lpae evtstrm crc32
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xd03
CPU revision : 4
...
It does work ok on a different armv8 (aarch64) system:
Odroid-C2, this uses the same processors as the RPI3, but is running an aarch64
linux OS.
4 x ARM Cortex-A53 rev 4 (0x4100d030)
cat /proc/cpuinfo
processor : 0
BogoMIPS : 2.00
Features : fp asimd crc32
CPU implementer : 0x41
CPU architecture: 8
CPU variant : 0x0
CPU part : 0xd03
CPU revision : 4
...
On the ODROID-C2 in aarch64 mode:
/usr/local/gcc/bin/gcc -Q --help=target | grep march
-march=ARCH armv8-a
>From gcc-bugs-return-574772-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 09:37:09 2017
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Subject: [Bug c++/56973] [DR 696] crash when capturing variables in nested lambdas
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--- Comment #5 from Jason Merrill <jason at gcc dot gnu.org> ---
Nathan mentioned today that we have the inverse problem as well: after we've
captured i, we should still be able to use its constant value. Here's an
example of things that ought to work and mostly don't:
int main()
{
const int i = 4;
[] { constexpr int x = i; };
[=] { &i; constexpr int x = i; };
[&] { &i; constexpr int x = i; };
[i] { &i; constexpr int x = i; };
[&i] { &i; constexpr int x = i; };
}
"Every id-expression within the compound-statement of a lambda-expression that
is an odr-use (6.2) of an entity captured by copy is transformed into an access
to the corresponding unnamed data member of the closure type. [ Note: An
id-expression that is not an odr-use refers to the original entity, never to a
member of the closure type. Furthermore, such an id-expression does not cause
the implicit capture of the entity. — end note ]"
"A variable x whose name appears as a potentially-evaluated expression ex is
odr-used by ex unless applying the lvalue-to-rvalue conversion (7.1) to x
yields a constant expression (8.20) that does not invoke any non-trivial
functions and, if x is an object, ex is an element of the set of potential
results of an expression e, where either the lvalue-to-rvalue conversion (7.1)
is applied to e, or e is a discarded-value expression (Clause 8)."
>From gcc-bugs-return-574773-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 09:46:50 2017
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Subject: [Bug c++/82154] ICE in fold_binary_loc, at fold-const.c:9088 in 32-bit mingw32
Date: Mon, 11 Sep 2017 09:46:00 -0000
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Thanks for pre-processed file, confirmed for following reduced test-case:
$ cat pr82154.ii
namespace a {
int b;
class c
{
};
}
class g
{
public:
g ();
};
using a::b;
class d
{
public:
d ();
e ();
};
class f
{
d
i ()
{
static d j;
}
*k () throw (a::c);
};
*f::k () throw (a::c)
{
static g h;
i ();
int l = 2;
while (l)
{
--l;
try
{
operator new (b);
}
catch (a::c)
{
}
}
i ().e ();
}
>From gcc-bugs-return-574774-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 10:39:26 2017
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Subject: [Bug target/82175] -march=native fails on armv7 big/little system armv7l-unknown-linux-gnueabihf with gcc 8.0.0
Date: Mon, 11 Sep 2017 10:39:00 -0000
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ktkachov at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ktkachov at gcc dot gnu.org,
| |rearnsha at gcc dot gnu.org
--- Comment #2 from ktkachov at gcc dot gnu.org ---
I think this is related to the option rewrite that Richard did for GCC 8
>From gcc-bugs-return-574775-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 10:44:28 2017
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Subject: [Bug c++/81852] Feature request: __cpp_threadsafe_static_init
Date: Mon, 11 Sep 2017 10:44:00 -0000
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |5.5
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Fixed for 5.5, 6.5 and 7.3
>From gcc-bugs-return-574776-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 10:44:56 2017
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Subject: [Bug c++/81852] Feature request: __cpp_threadsafe_static_init
Date: Mon, 11 Sep 2017 10:44:00 -0000
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--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Mon Sep 11 10:44:11 2017
New Revision: 251975
URL: https://gcc.gnu.org/viewcvs?rev=251975&root=gcc&view=rev
Log:
PR c++/81852 define feature-test macro for -fthreadsafe-statics
gcc/c-family:
PR c++/81852
* c-cppbuiltin.c (c_cpp_builtins): Define __cpp_threadsafe_static_init.
gcc/testsuite:
PR c++/81852
* g++.dg/cpp1y/feat-cxx11.C: Check __cpp_threadsafe_static_init.
* g++.dg/cpp1y/feat-cxx14.C: Likewise.
* g++.dg/cpp1y/feat-cxx98.C: Likewise.
* g++.dg/cpp1y/feat-neg.C: Likewise.
Modified:
branches/gcc-5-branch/gcc/c-family/ChangeLog
branches/gcc-5-branch/gcc/c-family/c-cppbuiltin.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog
branches/gcc-5-branch/gcc/testsuite/g++.dg/cpp1y/feat-cxx11.C
branches/gcc-5-branch/gcc/testsuite/g++.dg/cpp1y/feat-cxx14.C
branches/gcc-5-branch/gcc/testsuite/g++.dg/cpp1y/feat-cxx98.C
branches/gcc-5-branch/gcc/testsuite/g++.dg/cpp1y/feat-neg.C
>From gcc-bugs-return-574777-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 11:03:22 2017
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Subject: [Bug c++/82154] ICE in fold_binary_loc, at fold-const.c:9088 in 32-bit mingw32
Date: Mon, 11 Sep 2017 11:03:00 -0000
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--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
And as it's started with my patch (r251690), it's really mine.
>From gcc-bugs-return-574778-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 11:25:30 2017
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From: "f.hollerer at gmx dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug preprocessor/82176] New: Feature request: replace __FILE__ with file's basename instead its full name
Date: Mon, 11 Sep 2017 11:25:00 -0000
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Bug ID: 82176
Summary: Feature request: replace __FILE__ with file's basename
instead its full name
Product: gcc
Version: 6.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: f.hollerer at gmx dot net
Target Milestone: ---
Actually, this is a feature request, not a bug report.
It would be great to have a command line option to tell the
preprocessor to replace __FILE__ with the basename of a file, not the
complete name with relative or absolute path components as passed to
the preprocessor / compiler when invoked.
Reason is to minimise the amount of FLASH / code memory required for
the strings.
Explanation:
I am using arm-none-eabi-gcc version 6.3.1 downloaded from
https://developer.arm.com/ to build fora Cortex-M4 with 32 kB code
memory. Unfortunately, the cmake Build system I am using always passes
the absolute file path to the compiler, furthermore the driver code
provided by the chip vendor uses allot of assert()s.
I don't want to turn off assert()s completely, but with __FILE__ being
replaced with the full file name blows up my firmware image.
Restricting it to the file's basename would bring the image back to
reasonable size, by still providing good error messages.
After consutling google for a while, I found that other compiler toolchains
provide this feature. E.g. IAR:
https://www.iar.com/support/tech-notes/general/avoiding-full-paths-in-the-output-file/
Therefore, I think it is a feature of common interest, especially in the
embedded world.
Thanks & Best regards,
Franz Hollerer
>From gcc-bugs-return-574779-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 11:38:17 2017
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Subject: [Bug c/81432] Bogus fix-it hints from -Wmissing-braces when there are excess elements
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Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
CC| |marxin at gcc dot gnu.org
Ever confirmed|0 |1
>From gcc-bugs-return-574780-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 11:39:48 2017
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/82141] [8 Regression] raised RTSFIND.RE_NOT_AVAILABLE : rtsfind.adb:851 on darwin
Date: Mon, 11 Sep 2017 11:39:00 -0000
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--- Comment #12 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I have been able to bootstrap with the commit for ada/sem_ch7.adb reverted.
>From gcc-bugs-return-574781-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 12:02:24 2017
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Subject: [Bug c++/81525] [7 Regression] Invalid codegen with constexpr variable template
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 42155
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42155&action=edit
Rejects-valid testcase
This rather complex testcase was auto-reduced and provided on IRC. It fails
with current gcc-7-branch and compiles OK (with warnings) on trunk and
gcc-6-branch.
It was fixed on trunk by r250999, so presumably would be fixed on the
gcc-7-branch by re-applying r251001 now that the branch is unfrozen.
>From gcc-bugs-return-574782-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 12:07:06 2017
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Subject: [Bug fortran/34640] ICE when assigning item of a derived-component to a pointer
Date: Mon, 11 Sep 2017 12:07:00 -0000
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--- Comment #39 from Matt Thompson <matthew.thompson at nasa dot gov> ---
Thanks! I'll keep an eye out for this in an upcoming release so I can test with
GEOS.
>From gcc-bugs-return-574783-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 12:43:29 2017
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Subject: [Bug middle-end/82004] [8 Regression] SPEC CPU2017 628.pop2_s miscompare
Date: Mon, 11 Sep 2017 12:43:00 -0000
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Wilco <wilco at gcc dot gnu.org> changed:
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--- Comment #10 from Wilco <wilco at gcc dot gnu.org> ---
Using latest GLIBC, exp(log(10),-3) is only 3ULP different from 0.001. Since
(double)0.001 is rounded up, any <1ULP POW implementation could round down and
fail the test. So yes the first element in chlcnc really needs to be fixed to
0.00099999999999999 to allow for a few ULP of error in POW.
> As a last resort we can always choose to not touch 10**x
Unfortunately almost all useful cases are 10**x... So it would be great if we
can allow use of exp10 and exp2 to get more accurate results. This requires a
real implementation in GLIBC, and a way to disable it. Would it be feasible to
add a exp10 symbol to libgcc/libgfortran in case the math libraries don't
support it?
>From gcc-bugs-return-574784-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 12:51:22 2017
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From: "nunoplopes at sapo dot pt" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/82177] New: Alias analysis too aggressive with integer-to-pointer cast
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82177
Bug ID: 82177
Summary: Alias analysis too aggressive with integer-to-pointer
cast
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: middle-end
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CC: gil.hur at sf dot snu.ac.kr, jeehoon.kang at sf dot snu.ac.kr,
regehr at cs dot utah.edu, sanjoy at playingwithpointers dot com
Target Milestone: ---
The following code gets miscompiled with gcc:
#include <stdio.h>
#include <stdint.h>
void f(int*, int*);
int main()
{
int a=0, y[1], x = 0;
uintptr_t pi = (uintptr_t) &x;
uintptr_t yi = (uintptr_t) (y+1);
uintptr_t n = pi != yi;
if (n) {
a = 100;
pi = yi;
}
if (n) {
a = 100;
pi = (uintptr_t) y;
}
*(int *)pi = 15;
printf("a=%d x=%d\n", a, x);
f(&x,y);
return 0;
}
$ gcc -O2 c.c b.c -o foo
$ ./foo
a=0 x=0
This result is wrong. The two possible outcomes are: a=0 x=15, and a=100 x=0.
The bug seems to be in the alias analysis, which is not conservative enough in
handling integer-to-pointer casts. The wrong transformation happens at this
point (dump with -fdump-tree-all):
$ cat c.c.123t.pre
yi_8 = { y }
y = { ESCAPED NONLOCAL }
pi_4 = { y } same as yi_8
pi_9 = { y } same as yi_8
pi.0_10 = { y } same as yi_8
(...)
pi_7 = (uintptr_t) &x;
yi_8 = (uintptr_t) &MEM[(void *)&y + 4B];
if (pi_7 != yi_8)
goto <bb 4>;
else
goto <bb 3>;
<bb 3>:
# a_2 = PHI <0(2), 100(4)>
# pi_4 = PHI <yi_8(2), pi_9(4)>
pi.0_10 = (int *) pi_4;
*pi.0_10 = 15;
printf ("a=%d x=%d\n", a_2, 0); // <-- constant folded across the *pi store
// because it was incorrectly proven to not
// alias with x
Test case by Gil Hur.
>From gcc-bugs-return-574785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 12:55:54 2017
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Subject: [Bug middle-end/82177] Alias analysis too aggressive with integer-to-pointer cast
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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I don't see how this can ever be defined code.
By definition yi will never be equal to pi unless by accident.
>From gcc-bugs-return-574786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 12:58:45 2017
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From: "nunoplopes at sapo dot pt" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/82177] Alias analysis too aggressive with integer-to-pointer cast
Date: Mon, 11 Sep 2017 12:58:00 -0000
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--- Comment #2 from Nuno Lopes <nunoplopes at sapo dot pt> ---
(In reply to Andrew Pinski from comment #1)
> I don't see how this can ever be defined code.
>
> By definition yi will never be equal to pi unless by accident.
Sure, that's ok, but then pi = &x, and so the store '*(int*)pi = 15' should
write to x.
Right now it's printing x=0, which cannot be correct.
>From gcc-bugs-return-574787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 13:10:20 2017
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Subject: [Bug target/82170] gcc optimizes int range-checking poorly on x86-64
Date: Mon, 11 Sep 2017 13:10:00 -0000
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'll have a look.
>From gcc-bugs-return-574788-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 13:31:09 2017
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/82178] New: bootstrap fails on ppc64 for --enable-symvers=gnu-versioned-namespace
Date: Mon, 11 Sep 2017 13:31:00 -0000
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Bug ID: 82178
Summary: bootstrap fails on ppc64 for
--enable-symvers=gnu-versioned-namespace
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Keywords: build
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Target Milestone: ---
Target: powerpc*-*-linux*
Making all in include
make[4]: Entering directory
`/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include'
mkdir -p ./powerpc64le-unknown-linux-gnu/bits/stdc++.h.gch
/home/jwakely/build-v8/./gcc/xgcc -shared-libgcc -B/home/jwakely/build-v8/./gcc
-nostdinc++
-L/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/src
-L/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/src/.libs
-L/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/usr/local/powerpc64le-unknown-linux-gnu/bin/
-B/usr/local/powerpc64le-unknown-linux-gnu/lib/ -isystem
/usr/local/powerpc64le-unknown-linux-gnu/include -isystem
/usr/local/powerpc64le-unknown-linux-gnu/sys-include -x c++-header
-nostdinc++ -g -O2 -D_GNU_SOURCE
-I/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/powerpc64le-unknown-linux-gnu
-I/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include
-I/home/jwakely/src/gcc/libstdc++-v3/libsupc++ -O2 -g -std=gnu++0x
/home/jwakely/src/gcc/libstdc++-v3/include/precompiled/stdc++.h \
-o powerpc64le-unknown-linux-gnu/bits/stdc++.h.gch/O2ggnu++0x.gch
In file included from
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.h:2651:0,
from
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/basic_ios.h:37,
from
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/ios:44,
from
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/istream:38,
from
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/sstream:38,
from
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/complex:45,
from
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/ccomplex:39,
from
/home/jwakely/src/gcc/libstdc++-v3/include/precompiled/stdc++.h:52:
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1310:11:
error: ‘num_put’ is not a template function
const num_put<char>&
^~~~~~~
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1310:18:
error: expected ‘;’ before ‘<’ token
const num_put<char>&
^
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1314:11:
error: ‘num_get’ is not a template function
const num_get<char>&
^~~~~~~
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1314:18:
error: expected ‘;’ before ‘<’ token
const num_get<char>&
^
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1327:15:
error: ‘num_put’ was not declared in this scope
has_facet<num_put<char> >(const locale&);
^~~~~~~
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1327:15:
note: suggested alternative: ‘time_put’
has_facet<num_put<char> >(const locale&);
^~~~~~~
time_put
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1327:5:
error: parse error in template argument list
has_facet<num_put<char> >(const locale&);
^~~~~~~~~~~~~~~~~~~~~~~
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1327:5:
error: template-id ‘has_facet<<expression error> >’ used as a declarator
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1327:5:
error: ‘std::__8::has_facet(const std::__8::locale&)’ is not a variable
template
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1327:29:
error: expected ‘;’ before ‘>’ token
has_facet<num_put<char> >(const locale&);
^
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1331:15:
error: ‘num_get’ was not declared in this scope
has_facet<num_get<char> >(const locale&);
^~~~~~~
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1331:15:
note: suggested alternative: ‘time_get’
has_facet<num_get<char> >(const locale&);
^~~~~~~
time_get
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1331:5:
error: parse error in template argument list
has_facet<num_get<char> >(const locale&);
^~~~~~~~~~~~~~~~~~~~~~~
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1331:5:
error: template-id ‘has_facet<<expression error> >’ used as a declarator
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1331:5:
error: ‘std::__8::has_facet(const std::__8::locale&)’ is not a variable
template
/home/jwakely/build-v8/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/bits/locale_facets.tcc:1331:29:
error: expected ‘;’ before ‘>’ token
has_facet<num_get<char> >(const locale&);
^
(and lots more errors for money_get and money_put as well).
This fails as far back as gcc 4.8 (I didn't try earlier) so doesn't seem to be
a regression. I didn't check, but based on configure.ac it probably also fails
on 64-bit {sparc,s390,alpha}*-*-linux* targets too.
Rather than fixing it on trunk, I think we can just drop the ldbl compat
symbols for the versioned namespace build, since backwards compatibility is an
explicit non-goal of that configuration.
>From gcc-bugs-return-574789-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 13:44:42 2017
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Subject: [Bug target/81325] -fcompare-debug failure on ppc64le
Date: Mon, 11 Sep 2017 13:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81325
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-09-11
CC| |jakub at gcc dot gnu.org,
| |marxin at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Unfortunately confirmed, caused by (probably) in RTL expansion:
try_optimize_cfg iteration 1
Merging block 3 into block 2...
Merged blocks 2 and 3.
Merged 2 and 3 without moving.
Forwarding edge 17->18 to 19 failed.
Where w/o -g there's no forwarding failure. The CFG diverges here:
<bb 9> [53.47%] [count: INV]:
# DEBUG D#8 => &g
# DEBUG D#9 => D#8
# DEBUG this => D#9
# DEBUG a => 0B
# DEBUG this => 0B
# DEBUG D#2 => &MEM[(struct F *)0B].RefCount.D.2982
# DEBUG this => D#2
_77 = &MEM[(struct C *)0B]._M_i;
__atomic_fetch_add_4 (_77, 0, 0);
# DEBUG this => NULL
[some # DEBUG...]
# DEBUG this => D#2
__atomic_fetch_add_4 (_77, 0, 0);
# DEBUG this => NULL
Because __atomic_fetch_add_4 is eventually expanded as:
(code_label 93 92 436 8 5 (nil) [1 uses])
(note 436 93 94 8 [bb 8] NOTE_INSN_BASIC_BLOCK)
(insn 94 436 95 8 (set (reg:SI 152)
(unspec_volatile:SI [
(mem/v:SI (reg/f:DI 131 [ _76 ]) [-1 S4 A128])
] UNSPECV_LL)) "/home/marxin/Programming/testcases/pr82325.cpp":7
-1
(nil))
(insn 95 94 96 8 (set (reg:SI 153)
(plus:SI (reg:SI 152)
(const_int 0 [0])))
"/home/marxin/Programming/testcases/pr82325.cpp":7 -1
(nil))
(insn 96 95 97 8 (parallel [
(set (reg:CC 154)
(unspec_volatile:CC [
(const_int 0 [0])
] UNSPECV_SC))
(set (mem/v:SI (reg/f:DI 131 [ _76 ]) [-1 S4 A128])
(reg:SI 153))
]) "/home/marxin/Programming/testcases/pr82325.cpp":7 -1
(nil))
(jump_insn 97 96 437 8 (set (pc)
(if_then_else (ne (reg:CC 154)
(const_int 0 [0]))
(label_ref 93)
(pc))) "/home/marxin/Programming/testcases/pr82325.cpp":7 -1
(int_list:REG_BR_PROB 18 (nil))
-> 93)
which is a loop. Due to that a different CFG is created. And the failure
'Forwarding edge 17->18 to 19 failed.' is attempt
to skip from first atomic fetch loop to another. Fails due to existence of
bunch of debug statements in between.
Huh, still not sure where is error, can we have one __atomic_fetch_add_4
following another? GIMPLE representation does
not represent fact that's a loop code.
Advice welcomed.
>From gcc-bugs-return-574790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 14:13:09 2017
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Subject: [Bug target/81800] [8 regression] on aarch64 ilp32 lrint should not be inlined as two instructions
Date: Mon, 11 Sep 2017 14:13:00 -0000
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--- Comment #4 from Qing Zhao <qing.zhao at oracle dot com> ---
since I cannot change the Assignee field, in order to avoid redundant work:
I am currently studying this bug and try to fix it.
>From gcc-bugs-return-574791-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 14:32:00 2017
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Subject: [Bug c/82179] New: Use-after-free / double-free exploit mitigation request
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Bug ID: 82179
Summary: Use-after-free / double-free exploit mitigation
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>From gcc-bugs-return-574792-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 14:42:00 2017
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Subject: [Bug c/82179] Use-after-free / double-free exploit mitigation request
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--- Comment #1 from Federico Bento <up201407890 at fc dot up.pt> ---
Hello,
This a request for an exploit mitigation to be added to the compiler, possibly
when making use of FORTIFY_SOURCE.
Something like the below, but at the compiler level:
#define SAFE_FREE(x) do { if((x) != 0x0) { free(x); (x) = (void *)0x1; } }
while(0)
After free(x), we set x to an address that will crash when dereferenced
(use-after-free), and will also crash when it's an argument to free().
Note that NULL isn't used, because free(NULL) does nothing, which might
hide potential double-free bugs.
This will detect use-after-free and double-free bugs by having the program
crash instead of allowing various heap grooms and further exploitation.
After discussion with Martin Sebor and Florian Weimer in the libc-alpha list,
it was pointed out to me to post the request here for further interest.
https://sourceware.org/ml/libc-alpha/2017-09/msg00238.html
https://sourceware.org/ml/libc-alpha/2017-09/msg00423.html
Below are some examples of how it works,
Crashes when use-after-free:
$ cat test.c
#include <unistd.h>
#include <stdlib.h>
#define SAFE_FREE(x) do { if((x) != 0x0) { free(x); (x)=(void *)0x1; } }
while(0)
struct unicorn_counter { int num; };
int main() {
struct unicorn_counter* p_unicorn_counter;
int* run_calc = malloc(sizeof(int));
*run_calc = 0;
SAFE_FREE(run_calc);
//SAFE_FREE(run_calc);
p_unicorn_counter = malloc(sizeof(struct unicorn_counter));
p_unicorn_counter->num = 42;
if (*run_calc) // use-after-free
execlp("/usr/bin/id", "id", 0);
}
$ gcc test.c
$ ./a.out
Segmentation fault
$ gdb ./a.out
gdb$ r
...
0x4005ed <main+87>: mov eax,DWORD PTR [rax]
Stopped reason: SIGSEGV
0x00000000004005ed in main ()
gdb$ print /x $rax
$1 = 0x1
Crashes when double-free, by uncommenting 2nd SAFE_FREE(run_calc):
$ cat test.c
#include <unistd.h>
#include <stdlib.h>
#define SAFE_FREE(x) do { if((x) != 0x0) { free(x); (x)=(void *)0x1; } }
while(0)
struct unicorn_counter { int num; };
int main() {
struct unicorn_counter* p_unicorn_counter;
int* run_calc = malloc(sizeof(int));
*run_calc = 0;
SAFE_FREE(run_calc);
SAFE_FREE(run_calc); // double-free
p_unicorn_counter = malloc(sizeof(struct unicorn_counter));
p_unicorn_counter->num = 42;
if (*run_calc) execlp("/usr/bin/id", "id", 0);
}
$ gcc test.c
$ gdb ./a.out
gdb$ r
...
0x7ffff7aad614 <__GI___libc_free+20>: mov rax,QWORD PTR [rdi-0x8]
Stopped reason: SIGSEGV
__GI___libc_free (mem=0x1) at malloc.c:2929
warning: Source file is more recent than executable.
$ print /x $rdi
$1 = 0x1
>From gcc-bugs-return-574794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 14:45:48 2017
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Subject: [Bug c/82179] Use-after-free / double-free exploit mitigation request
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--- Comment #2 from Federico Bento <up201407890 at fc dot up.pt> ---
I pressed enter before entering a description, so the actual description is
comment 1. Sorry for that.
Federico Bento.
>From gcc-bugs-return-574793-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 14:45:30 2017
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Subject: [Bug target/81800] [8 regression] on aarch64 ilp32 lrint should not be inlined as two instructions
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81800
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |tnfchris at gcc dot gnu.org
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00522.html
>From gcc-bugs-return-574795-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 14:46:32 2017
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Subject: [Bug target/81800] [8 regression] on aarch64 ilp32 lrint should not be inlined as two instructions
Date: Mon, 11 Sep 2017 14:46:00 -0000
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--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Qing Zhao from comment #4)
> since I cannot change the Assignee field, in order to avoid redundant work:
> I am currently studying this bug and try to fix it.
Tamar is already working on it and has since August.
https://gcc.gnu.org/ml/gcc-patches/2017-08/msg00782.html
https://gcc.gnu.org/ml/gcc-patches/2017-09/msg00522.html
>From gcc-bugs-return-574796-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 14:49:22 2017
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Subject: [Bug target/81325] -fcompare-debug failure on ppc64le
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--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'll have a look.
>From gcc-bugs-return-574797-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 15:03:52 2017
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From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/82180] New: assign_spill_hard_regs spills to unaligned register pair
Date: Mon, 11 Sep 2017 15:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82180
Bug ID: 82180
Summary: assign_spill_hard_regs spills to unaligned register
pair
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
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Target Milestone: ---
Consider the gcn target (currently only available upstream on the gcn branch).
For SGPR regs, it requires aligned register pairs, in other words (r0, r1) is
ok, but (r1, r2) is not ok, and gcn_hard_regno_mode_ok is setup accordingly.
However, I'm running into spills being generated by lra using an unaligned
register pair (in this case, it's (r67, r77)):
...
;(insn 53501 58177 3793 633 (set (reg:DI 67 s67)
; (reg:DI 42 s42 [4460])) "minlocval_3.f90":59 16 {*movdi_insn}
; (nil))
...
The compiler finishes without problems, but the assembler complains.
I've traced the introduction of the unaligned register pair back to
assign_spill_hard_regs. Using this patch, I can detect the problem at runtime:
...
diff --git a/gcc/lra-spills.c b/gcc/lra-spills.c
index 492fc18..476ce3d 100644
--- a/gcc/lra-spills.c
+++ b/gcc/lra-spills.c
@@ -71,6 +71,7 @@ along with GCC; see the file COPYING3. If not see
#include "cfgrtl.h"
#include "lra.h"
#include "lra-int.h"
+#include "tm_p.h"
/* Max regno at the start of the pass. */
@@ -292,6 +293,7 @@ assign_spill_hard_regs (int *pseudo_regnos, int n)
for (p = r->start; p <= r->finish; p++)
add_to_hard_reg_set (&reserved_hard_regs[p],
lra_reg_info[regno].biggest_mode, hard_regno);
+ gcc_assert (HARD_REGNO_MODE_OK (hard_regno, PSEUDO_REGNO_MODE (regno)));
spill_hard_reg[regno]
= gen_raw_REG (PSEUDO_REGNO_MODE (regno), hard_regno);
for (nr = 0;
...
Trying a bit harder, I can fix the problem by skipping over the unaligned
register here:
...
diff --git a/gcc/lra-spills.c b/gcc/lra-spills.c
index 492fc18..6ecfad2 100644
--- a/gcc/lra-spills.c
+++ b/gcc/lra-spills.c
@@ -276,7 +276,10 @@ assign_spill_hard_regs (int *pseudo_regnos, int n)
for (k = 0; k < spill_class_size; k++)
{
hard_regno = ira_class_hard_regs[spill_class][k];
- if (! overlaps_hard_reg_set_p (conflict_hard_regs, mode, hard_regno))
+ if (! ira_prohibited_class_mode_regs[spill_class][PSEUDO_REGNO_MODE
(regno)]
+ && ! overlaps_hard_reg_set_p (conflict_hard_regs, mode,
+ hard_regno))
break;
}
if (k >= spill_class_size)
...
Unfortunately, I've not yet managed to reproduce this problem on an upstream
branch.
>From gcc-bugs-return-574798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 15:21:18 2017
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Subject: [Bug fortran/82168] Parameterized Derived Types, problems with default type parameters
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Paul Thomas <pault at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
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--- Comment #2 from Paul Thomas <pault at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #1)
> Confirmed. Is the code valid?
>
> module mod
> implicit none
>
> integer, parameter :: dp = kind (0.0d0)
>
> type, public :: v(z, k)
> integer, len :: z
> integer, kind :: k
> real(kind = k) :: e(z)
> end type v
>
> end module mod
>
> program bug
> use mod
> implicit none
>
> type (v(2,dp)) :: a
>
> a%e = 1.0
> print *, a%e
> end program bug
>
> prints
>
> 1.0000000000000000 1.0000000000000000
Dear Dominique,
Your example is legal.
Thanks for following this.
The original contains two bugs and so I have confirmed this PR as NEW.
Cheers
Paul
>From gcc-bugs-return-574799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 15:21:29 2017
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From: "benni.buch at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/72752] [6 Regression] ICE: in retrieve_specialization, at cp/pt.c:1183
Date: Mon, 11 Sep 2017 15:21:00 -0000
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Benjamin Buch <benni.buch at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |benni.buch at gmail dot com
--- Comment #11 from Benjamin Buch <benni.buch at gmail dot com> ---
template< typename >
struct Outer
{
template< typename >
struct Inner;
};
template<>
template< typename _T_ >
class Outer< _T_ >::Inner< _T_ >
{};
template struct Outer< int >::Inner< int >;
This test case still fails in Trunk:
$ g++ gcc-test.cpp
gcc-test.cpp:10:21: internal compiler error: in retrieve_specialization, at
cp/pt.c:1189
class Outer< _T_ >::Inner< _T_ >
^~~~~~~~~~~~
0x63457f retrieve_specialization
../../gcc/gcc/cp/pt.c:1186
0xa6445e tsubst_template_decl
../../gcc/gcc/cp/pt.c:12477
0xa5fe7e tsubst_decl
../../gcc/gcc/cp/pt.c:12646
0xa5a097 tsubst(tree_node*, tree_node*, int, tree_node*)
../../gcc/gcc/cp/pt.c:13538
0xa4edad most_specialized_partial_spec
../../gcc/gcc/cp/pt.c:22160
0xa77278 instantiate_class_template_1
../../gcc/gcc/cp/pt.c:10330
0xa77278 instantiate_class_template(tree_node*)
../../gcc/gcc/cp/pt.c:10898
0xabc5ad complete_type(tree_node*)
../../gcc/gcc/cp/typeck.c:136
0xa72c0e do_type_instantiation(tree_node*, tree_node*, int)
../../gcc/gcc/cp/pt.c:22425
0xa280fb cp_parser_explicit_instantiation
../../gcc/gcc/cp/parser.c:16430
0xa2f181 cp_parser_declaration
../../gcc/gcc/cp/parser.c:12655
0xa2f56b cp_parser_declaration_seq_opt
../../gcc/gcc/cp/parser.c:12579
0xa2f89a cp_parser_translation_unit
../../gcc/gcc/cp/parser.c:4387
0xa2f89a c_parse_file()
../../gcc/gcc/cp/parser.c:38799
0xb29786 c_common_parse_file()
../../gcc/gcc/c-family/c-opts.c:1106
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.
$ g++ --version
g++ (GCC) 8.0.0 20170911 (experimental)
>From gcc-bugs-return-574800-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 15:22:56 2017
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Subject: [Bug fortran/82173] [meta-bug] Parameterized derived type errors
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Paul Thomas <pault at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
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--- Comment #1 from Paul Thomas <pault at gcc dot gnu.org> ---
Dear Thomas,
Thanks for doing that.
Cheers
Paul
>From gcc-bugs-return-574801-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 15:42:40 2017
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Subject: [Bug c/82179] Use-after-free / double-free exploit mitigation request
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Eric Gallager <egallager at gcc dot gnu.org> changed:
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----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=80532
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
Related: bug 80532
>From gcc-bugs-return-574802-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 15:47:21 2017
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From: "bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/80700] [7/8 Regression] ICE: Bus error (on SPE target)
Date: Mon, 11 Sep 2017 15:47:00 -0000
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--- Comment #3 from Peter Bergner <bergner at gcc dot gnu.org> ---
I don't think my patch is the cause of the problem, more like it just exposed
more problems in the SPE code. After RA, we call into LRA to spill a pseudo
that did not get allocated a register:
Breakpoint 5, lra (f=0x0) at
/home/bergner/gcc/gcc-fsf-mainline-pr80700/gcc/lra.c:2319
2319 lra_dump_file = f;
(gdb) prx 398
(insn 398 400 41 4 (set (reg:SI 564 [+4 ])
(subreg:SI (reg:V2SI 156 [ _2 ]) 4)) "pr80700.i":16 2072
{*mov_siv2si_e500_subreg4_2_be}
(expr_list:REG_DEAD (reg:V2SI 156 [ _2 ])
(nil)))
(gdb) p reg_renumber[564]
$1 = 65
(gdb) p reg_renumber[156]
$2 = -1
Then during LRA, insn 398 gets copied into a simple reg copy, which causes use
to SEGV (or trapped by rtl checking) because the subreg isn't there anymore:
(gdb) c
Continuing.
during RTL pass: reload
pr80700.i: In function ‘i5’:
pr80700.i:21:1: internal compiler error: RTL check: expected elt 0 type 'e' or
'u', have 'r' (rtx reg) in insn_extract, at insn-extract.c:3776
}
^
0x10cdc60b rtl_check_failed_type2(rtx_def const*, int, int, int, char const*,
int, char const*)
/home/bergner/gcc/gcc-fsf-mainline-pr80700/gcc/rtl.c:820
0x1177ce83 insn_extract(rtx_insn*)
/home/bergner/gcc/build/gcc-fsf-mainline-pr80700-rtl-debug/gcc/insn-extract.c:3776
0x10c25147 extract_insn(rtx_insn*)
/home/bergner/gcc/gcc-fsf-mainline-pr80700/gcc/recog.c:2317
0x10c246f7 extract_constrain_insn(rtx_insn*)
/home/bergner/gcc/gcc-fsf-mainline-pr80700/gcc/recog.c:2211
0x10a67653 check_rtl
/home/bergner/gcc/gcc-fsf-mainline-pr80700/gcc/lra.c:2128
0x10a68e03 lra(_IO_FILE*)
/home/bergner/gcc/gcc-fsf-mainline-pr80700/gcc/lra.c:2546
0x109dcebf do_reload
/home/bergner/gcc/gcc-fsf-mainline-pr80700/gcc/ira.c:5440
0x109dd63f execute
/home/bergner/gcc/gcc-fsf-mainline-pr80700/gcc/ira.c:5624
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.
Breakpoint 4, 0x0fc0be64 in exit () from /lib/power7/libc.so.6
(gdb) prx 398
(insn 398 526 525 4 (set (reg:SI 27 27 [orig:564+4 ] [564])
(reg:SI 648)) "pr80700.i":16 2072 {*mov_siv2si_e500_subreg4_2_be}
(nil))
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Subject: [Bug middle-end/82177] Alias analysis too aggressive with integer-to-pointer cast
Date: Mon, 11 Sep 2017 16:19:00 -0000
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--- Comment #3 from Nuno Lopes <nunoplopes at sapo dot pt> ---
Sorry, I forgot to include the code for b.c:
void f(int*x, int*y) {}
>From gcc-bugs-return-574804-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 16:53:46 2017
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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/82158] _Noreturn functions that do return clobber caller's registers on ARM32 (but not other arches)
Date: Mon, 11 Sep 2017 16:53:00 -0000
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--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
Falling off a noreturn function sounds like it could be another case to
insert __builtin_trap (), as we do in various cases of undefined behavior.
>From gcc-bugs-return-574805-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 17:14:55 2017
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Subject: [Bug c/42579] [PATCH] support for obtaining file basename
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please send patches to the gcc-patches mailing list for review. Patches in
bugzilla are easily overlooked or forgotten.
https://gcc.gnu.org/contribute.html
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Subject: [Bug preprocessor/82176] Feature request: replace __FILE__ with file's basename instead its full name
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Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=42579
Severity|normal |enhancement
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
See PR 42579 which has a patch to add __FILE_BASENAME__ for this purpose.
>From gcc-bugs-return-574807-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 11 17:26:01 2017
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Subject: [Bug preprocessor/82176] Feature request: replace __FILE__ with file's basename instead its full name
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--- Comment #2 from f.hollerer at gmx dot net ---
> See PR 42579 which has a patch to add __FILE_BASENAME__ for this purpose.
Unfortunately this does not solve the problem when __FILE__ is used indirectly
via the assert() macro shipped with the compiler toolchain.
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* [Bug c++/64867] split warning for passing non-POD to varargs function from -Wconditionally-supported into new warning flag, -Wnon-pod-varargs
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (11 preceding siblings ...)
2017-09-05 14:11 ` rsandifo at gcc dot gnu.org
@ 2021-09-03 18:17 ` dcb314 at hotmail dot com
2022-12-05 15:05 ` jason at gcc dot gnu.org
2022-12-19 15:56 ` cvs-commit at gcc dot gnu.org
14 siblings, 0 replies; 16+ messages in thread
From: dcb314 at hotmail dot com @ 2021-09-03 18:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
David Binderman <dcb314 at hotmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dcb314 at hotmail dot com
--- Comment #30 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Trass3r from comment #27)
> This should really be enabled by -Wall or -Wextra as it generates code that
> may easily crash or corrupt something.
+1.
Clang errors, intel warns and for gcc you have to enable the somewhat
obscure flag -Wconditionally-supported to see anything at all.
gcc looks to be a trailer on this issue. It's not about standards conformance,
its about making it easy for users to find bugs.
Source code I used is:
struct S
{
S();
S( const S &);
~S();
char * p;
};
void f( int, ...);
void g()
{
S s1;
f( 3, s1);
};
$ /home/dcb/llvm/results/bin/clang++ sep3f.cc
sep3f.cc:19:8: error: cannot pass object of non-trivial type 'S' through
variadic function; call will abort at runtime [-Wnon-pod-varargs]
f( 3, s1);
^
1 error generated.
$ /home/dcb34/intel/oneapi/compiler/2021.3.0/linux/bin/intel64/icpc sep3f.cc
sep3f.cc(19): warning #1595: a class type that is not trivially copyable passed
through ellipsis
f( 3, s1);
^
$ /home/dcb/gcc/results/bin/g++ -c -g -O2 -Wall -Wextra sep3f.cc
$ /home/dcb/gcc/results/bin/g++ -c -g -O2 -Wall -Wextra
-Wconditionally-supported sep3f.cc
sep3f.cc: In function ‘void g()’:
sep3f.cc:19:10: warning: passing objects of non-trivially-copyable type ‘struct
S’ through ‘...’ is conditionally supported [-Wconditionally-supported]
19 | f( 3, s1);
| ~^~~~~~~~
I'll add flag -Wconditionally-supported to a build of Fedora and see
what happens.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] split warning for passing non-POD to varargs function from -Wconditionally-supported into new warning flag, -Wnon-pod-varargs
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (12 preceding siblings ...)
2021-09-03 18:17 ` [Bug c++/64867] split warning for passing non-POD to varargs function from -Wconditionally-supported into new warning flag, -Wnon-pod-varargs dcb314 at hotmail dot com
@ 2022-12-05 15:05 ` jason at gcc dot gnu.org
2022-12-19 15:56 ` cvs-commit at gcc dot gnu.org
14 siblings, 0 replies; 16+ messages in thread
From: jason at gcc dot gnu.org @ 2022-12-05 15:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #31 from Jason Merrill <jason at gcc dot gnu.org> ---
(In reply to David Binderman from comment #30)
> gcc looks to be a trailer on this issue. It's not about standards conformance,
> its about making it easy for users to find bugs.
But under GCC it's not a bug, it just works. Clang is welcome to adopt the
same semantics. But I'm also happy to accept the patch in comment #17 once it
includes testing.
And GCC should build with -Wconditionally-supported so we support bootstrapping
with compilers that make different choices.
^ permalink raw reply [flat|nested] 16+ messages in thread
* [Bug c++/64867] split warning for passing non-POD to varargs function from -Wconditionally-supported into new warning flag, -Wnon-pod-varargs
2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
` (13 preceding siblings ...)
2022-12-05 15:05 ` jason at gcc dot gnu.org
@ 2022-12-19 15:56 ` cvs-commit at gcc dot gnu.org
14 siblings, 0 replies; 16+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-12-19 15:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #32 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jason Merrill <jason@gcc.gnu.org>:
https://gcc.gnu.org/g:263c22a95bc9a0d80c4873c0291b0f938cea7310
commit r13-4795-g263c22a95bc9a0d80c4873c0291b0f938cea7310
Author: Jason Merrill <jason@redhat.com>
Date: Mon Dec 5 10:00:31 2022 -0500
build: add -Wconditionally-supported to strict_warn [PR64867]
The PR (which isn't resolved by this commit) pointed out to me that GCC
should build with -Wconditionally-supported to support bootstrapping with a
C++11 compiler that makes different choices.
PR c++/64867
gcc/ChangeLog:
* configure.ac (strict_warn): Add -Wconditionally-supported.
* configure: Regenerate.
^ permalink raw reply [flat|nested] 16+ messages in thread
end of thread, other threads:[~2022-12-19 15:56 UTC | newest]
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2015-01-29 17:38 [Bug c++/64867] New: warning for passing non-POD to varargs function tromey at gcc dot gnu.org
2015-01-29 18:28 ` [Bug c++/64867] " pinskia at gcc dot gnu.org
2015-01-29 18:30 ` redi at gcc dot gnu.org
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2015-02-02 19:38 ` tromey at gcc dot gnu.org
2017-09-05 14:11 ` rsandifo at gcc dot gnu.org
2021-09-03 18:17 ` [Bug c++/64867] split warning for passing non-POD to varargs function from -Wconditionally-supported into new warning flag, -Wnon-pod-varargs dcb314 at hotmail dot com
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