[Bug c++/58372] internal compiler error: ix86_compute_frame

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* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
@ 2013-09-09 16:12 ` paolo.carlini at oracle dot com
  2013-09-10  8:54 ` rguenth at gcc dot gnu.org
                   ` (10 subsequent siblings)
  11 siblings, 0 replies; 12+ messages in thread
From: paolo.carlini at oracle dot com @ 2013-09-09 16:12 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2013-09-09
            Summary|internal compiler error:    |internal compiler error:
                   |ix86_compute_fra >          |ix86_compute_frame_layout
                   |me_layout                   |
     Ever confirmed|0                           |1

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
In any case a self contained reproducer is a requirement. Please do your best
to reduce it to a manageable size

  http://gcc.gnu.org/wiki/A_guide_to_testcase_reduction

and otherwise compress it (with, say, gzip or bzip2).


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
  2013-09-09 16:12 ` [Bug c++/58372] internal compiler error: ix86_compute_frame_layout paolo.carlini at oracle dot com
@ 2013-09-10  8:54 ` rguenth at gcc dot gnu.org
  2013-09-12 11:40 ` sonoro at telefonica dot net
                   ` (9 subsequent siblings)
  11 siblings, 0 replies; 12+ messages in thread
From: rguenth at gcc dot gnu.org @ 2013-09-10  8:54 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |mingw32-sjlj

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Please also specify how you configured the compiler(s).


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
  2013-09-09 16:12 ` [Bug c++/58372] internal compiler error: ix86_compute_frame_layout paolo.carlini at oracle dot com
  2013-09-10  8:54 ` rguenth at gcc dot gnu.org
@ 2013-09-12 11:40 ` sonoro at telefonica dot net
  2013-09-12 11:40 ` sonoro at telefonica dot net
                   ` (8 subsequent siblings)
  11 siblings, 0 replies; 12+ messages in thread
From: sonoro at telefonica dot net @ 2013-09-12 11:40 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #3 from sonoro at telefonica dot net ---
Created attachment 30808
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30808&action=edit
ii file compressed with rar


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
                   ` (2 preceding siblings ...)
  2013-09-12 11:40 ` sonoro at telefonica dot net
@ 2013-09-12 11:40 ` sonoro at telefonica dot net
  2013-10-01 17:33 ` sonoro at telefonica dot net
                   ` (7 subsequent siblings)
  11 siblings, 0 replies; 12+ messages in thread
From: sonoro at telefonica dot net @ 2013-09-12 11:40 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #4 from sonoro at telefonica dot net ---
this are the compiler flags for the project

CXX_FLAGS = -save-temps   -msse -msse -mfpmath=sse -msse2 -std=c++11
-mstackrealign  -O2 -g -DNDEBUG
@CMakeFiles/DelayUGens_supernova.dir/includes_CXX.rsp   -fschedule-insns2
-fomit-frame-pointer -Wreturn-type -fvisibility=hidden -fno-finite-math-only

CXX_DEFINES = -DBOOST_ALL_NO_LIB -DBOOST_CHRONO_HEADER_ONLY
-DBOOST_DATE_TIME_NO_LIB -DBOOST_THREAD_USE_LIB -DDelayUGens_supernova_EXPORTS
-DNOMINMAX -DNOVA_SIMD -DSC_FFT_FFTW -DSC_WIN32 -DSUPERNOVA
-DWIN32_LEAN_AND_MEAN -D_WIN32_WINNT=0x0500


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
                   ` (3 preceding siblings ...)
  2013-09-12 11:40 ` sonoro at telefonica dot net
@ 2013-10-01 17:33 ` sonoro at telefonica dot net
  2013-10-01 17:58 ` sonoro at telefonica dot net
                   ` (6 subsequent siblings)
  11 siblings, 0 replies; 12+ messages in thread
From: sonoro at telefonica dot net @ 2013-10-01 17:33 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #5 from sonoro at telefonica dot net ---
Is there anything else I must provide in order to solve this issue?


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
                   ` (4 preceding siblings ...)
  2013-10-01 17:33 ` sonoro at telefonica dot net
@ 2013-10-01 17:58 ` sonoro at telefonica dot net
  2013-10-01 18:43 ` paolo.carlini at oracle dot com
                   ` (5 subsequent siblings)
  11 siblings, 0 replies; 12+ messages in thread
From: sonoro at telefonica dot net @ 2013-10-01 17:58 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #6 from sonoro at telefonica dot net ---
(In reply to Paolo Carlini from comment #1)
> In any case a self contained reproducer is a requirement. Please do your
> best to reduce it to a manageable size
> 
>   http://gcc.gnu.org/wiki/A_guide_to_testcase_reduction
> 
> and otherwise compress it (with, say, gzip or bzip2).

Done!!


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
                   ` (5 preceding siblings ...)
  2013-10-01 17:58 ` sonoro at telefonica dot net
@ 2013-10-01 18:43 ` paolo.carlini at oracle dot com
  2013-12-10 19:06 ` ktietz at gcc dot gnu.org
                   ` (4 subsequent siblings)
  11 siblings, 0 replies; 12+ messages in thread
From: paolo.carlini at oracle dot com @ 2013-10-01 18:43 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #7 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Please, if you really want to see progress on this issue, do your best to
reduce the reproducer to a manageable size, normally less than, say, 100 lines
are more than enough.


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
                   ` (6 preceding siblings ...)
  2013-10-01 18:43 ` paolo.carlini at oracle dot com
@ 2013-12-10 19:06 ` ktietz at gcc dot gnu.org
  2013-12-10 19:19 ` hjl.tools at gmail dot com
                   ` (3 subsequent siblings)
  11 siblings, 0 replies; 12+ messages in thread
From: ktietz at gcc dot gnu.org @ 2013-12-10 19:06 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

Kai Tietz <ktietz at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
                 CC|                            |ktietz at gcc dot gnu.org

--- Comment #8 from Kai Tietz <ktietz at gcc dot gnu.org> ---
So assert trigger here is:
'gcc_assert (preferred_alignment <= stack_alignment_needed);'

Caused because because
(gdb) print preferred_alignment
$1 = 16
(gdb) print stack_alignment_needed
$2 = 4

So hacky variant to fix that would be to enforce that preferred and
stack-alignment_needed are set identical

Index: i386.c
===================================================================
--- i386.c      (Revision 205860)
+++ i386.c      (Arbeitskopie)
@@ -9362,6 +9362,14 @@ ix86_compute_frame_layout (struct ix86_frame *fram
       crtl->stack_alignment_needed = 128;
     }

+  /* If preferred_alignment is bigger then stack_alignment_needed
+     make both sizes equal.  */
+  if (preferred_alignment > stack_alignment_needed)
+    {
+      stack_alignment_needed = preferred_alignment;
+      crtl->stack_alignment_needed = crtl->preferred_stack_boundary;
+    }
+
   gcc_assert (!size || stack_alignment_needed);
   gcc_assert (preferred_alignment >= STACK_BOUNDARY / BITS_PER_UNIT);
   gcc_assert (preferred_alignment <= stack_alignment_needed);


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
                   ` (7 preceding siblings ...)
  2013-12-10 19:06 ` ktietz at gcc dot gnu.org
@ 2013-12-10 19:19 ` hjl.tools at gmail dot com
  2013-12-10 19:22 ` ktietz at gcc dot gnu.org
                   ` (2 subsequent siblings)
  11 siblings, 0 replies; 12+ messages in thread
From: hjl.tools at gmail dot com @ 2013-12-10 19:19 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
My understanding is stack realignment doesn't work on Windows.
There was a attempt to do it at a time.  But we didn't know
enough about Windows to do it.


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
                   ` (8 preceding siblings ...)
  2013-12-10 19:19 ` hjl.tools at gmail dot com
@ 2013-12-10 19:22 ` ktietz at gcc dot gnu.org
  2013-12-14  9:46 ` sonoro at telefonica dot net
  2018-10-31  2:57 ` xuepeng.guo at intel dot com
  11 siblings, 0 replies; 12+ messages in thread
From: ktietz at gcc dot gnu.org @ 2013-12-10 19:22 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #10 from Kai Tietz <ktietz at gcc dot gnu.org> ---
Well, for x64 we can't realign stack due issue about prologue layout enforced
by SEH stuff.

For x86 I see actually no good reason why this shouldn't work.  I checked
generated assembly and it looks fine AFAICS.
Do you recall what the issue for x86 windows was?


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
                   ` (9 preceding siblings ...)
  2013-12-10 19:22 ` ktietz at gcc dot gnu.org
@ 2013-12-14  9:46 ` sonoro at telefonica dot net
  2018-10-31  2:57 ` xuepeng.guo at intel dot com
  11 siblings, 0 replies; 12+ messages in thread
From: sonoro at telefonica dot net @ 2013-12-14  9:46 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #11 from sonoro at telefonica dot net ---
So it seems you solved the problem in sjlj
Are you going to push it?
Thanks
victor


^ permalink raw reply	[flat|nested] 12+ messages in thread

* [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
       [not found] <bug-58372-4@http.gcc.gnu.org/bugzilla/>
                   ` (10 preceding siblings ...)
  2013-12-14  9:46 ` sonoro at telefonica dot net
@ 2018-10-31  2:57 ` xuepeng.guo at intel dot com
  11 siblings, 0 replies; 12+ messages in thread
From: xuepeng.guo at intel dot com @ 2018-10-31  2:57 UTC (permalink / raw)
  To: gcc-bugs

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="UTF-8", Size: 965156 bytes --]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #23 from Terry Guo <xuepeng.guo at intel dot com> ---
Hi UroÅ¡:

With your fix, I identified two regressions so far: one is that we should run
the case you provided with c++ standard newer than c++11. The 'noexcept' was
introduced in c++14. Guess we need a directive like "{ ! target c++14_down }".
Another regression is related to -fsanitize=address shown as below:

./gcc/cc1plus use-after-scope-types-5.ii  -quiet -m32 -O0 -fsanitize=address 
-o use-after-scope-types-5.s
during RTL pass: expand
In file included from
/export/users/xuepengg/58372-ice-stack-alignment/gcc/gcc/testsuite/g++.dg/asan/use-after-scope-types-5.C:4:
/export/users/xuepengg/58372-ice-stack-alignment/gcc/gcc/testsuite/g++.dg/asan/use-after-scope-types.h:
In function â€˜void test() [with T = char [1000]]â€™:
/export/users/xuepengg/58372-ice-stack-alignment/gcc/gcc/testsuite/g++.dg/asan/use-after-scope-types.h:22:51:
internal compiler error: in safe_as_a, at is-a.h:210
   22 | template <class T> __attribute__((noinline)) void test() {
      |                                                   ^~~~
0x11d5b1f rtx_insn* safe_as_a<rtx_insn*, rtx_def>(rtx_def*)
        ../../gcc/gcc/is-a.h:210
0x11d5b1f NEXT_INSN(rtx_insn const*)
        ../../gcc/gcc/rtl.h:1461
0x11d5b1f ix86_get_drap_rtx
        ../../gcc/gcc/config/i386/i386.c:12050
0xa92e12 emit_library_call_value_1(int, rtx_def*, rtx_def*, libcall_type,
machine_mode, int, std::pair<rtx_def*, machine_mode>*)
        ../../gcc/gcc/calls.c:4757
0xecc975 emit_library_call(rtx_def*, libcall_type, machine_mode, rtx_def*,
machine_mode, rtx_def*, machine_mode, rtx_def*, machine_mode)
        ../../gcc/gcc/rtl.h:4149
0xecc975 asan_emit_stack_protection(rtx_def*, rtx_def*, unsigned int, long*,
tree_node**, int)
        ../../gcc/gcc/asan.c:1500
0xaa53ff expand_used_vars
        ../../gcc/gcc/cfgexpand.c:2273
0xaa6d13 execute
        ../../gcc/gcc/cfgexpand.c:6268
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
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From: "xuepeng.guo at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
Date: Wed, 31 Oct 2018 02:59:00 -0000
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--- Comment #24 from Terry Guo <xuepeng.guo at intel dot com> ---
Created attachment 44934
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44934&action=edit
case to reproduce problem related to sanitize
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Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at redhat dot com,
                   |                            |nathan at acm dot org,
                   |                            |svoboda at cert dot org

--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
C++ FE maintainers, any ideas how to implement this?
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Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dmalcolm at gcc dot gnu.org,
                   |                            |dodji at gcc dot gnu.org

--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #1)
> Confirmed that g++ still doesn't warn.

Maybe a diagnostics maintainer will know if/how g++ could/should warn
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78829

--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #3)
> https://gcc.gnu.org/onlinedocs/gcc/Alignment.html should discuss the
> relationship between GCC's __alignof__ and C11's _Alignof. Are they
> identical? Should _Alignof be preferred when using C11? It could also
> mention _Alignas, and the macros (keywords in C++11 and later) alignof and
> alignas.

This seems like a separate issue?
>From gcc-bugs-return-619734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 04:09:11 2018
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Subject: [Bug c/79696] missing -Wunused-result on calls to malloc() and calloc()
Date: Wed, 31 Oct 2018 04:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79696

Eric Gallager <egallager at gcc dot gnu.org> changed:

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                 CC|                            |pinskia at gcc dot gnu.org

--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> -Wunused-result warns on the attribute warn_unused_result usage.  If these
> functions are not marked that way in glibc, it is maybe a glibc bug.
> I don't think we should mark these as warn_unused_result really.

GNU Coding Standards say to always check the result of malloc() and realloc()
in the "Writing Robust Programs" section: 
https://www.gnu.org/prep/standards/html_node/Semantics.html#Semantics
(this is why xmalloc and xrealloc are used instead in libiberty and gnulib and
everywhere)
Based on this, I think it makes sense to mark them as warn_unused_result. 
(on a tangential note, I think it'd make sense to add a -Wgcs flag that warns
about all the checkable coding guidelines mentioned in the GNU Coding
Standards)
>From gcc-bugs-return-619735-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 04:42:12 2018
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Subject: [Bug c/71422] Total size of static objects is not limited
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71422

Eric Gallager <egallager at gcc dot gnu.org> changed:

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--- Comment #4 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #3)
> (In reply to Eric Gallager from comment #2)
> > (In reply to Jakub Jelinek from comment #1)
> > > IMNSHO gcc shouldn't, after all, if you just put each into a separate CU,
> > > gcc won't even see them together.  It should be linker's responsibility to
> > > complain.
> > 
> > What if you use LTO?
> 
> WAITING on a reply to this

No reply; assuming that LTO can't actually do anything and that this is
actually a linker issue as Jakub suggested.
>From gcc-bugs-return-619736-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 06:31:33 2018
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Subject: [Bug libstdc++/87822] [regression 6/7/8/9] Binary incompatibility in std::pair introduced by PR 86751
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
The easiest would be to make __pair_base a template so it is different for
different pairs and doesn't affect the layout when nesting pairs. But that
won't help for existing releases, especially when 6-branch just closed.
>From gcc-bugs-return-619737-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 06:47:32 2018
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Subject: [Bug demangler/87602] Integer Overflow in cplus-dem.c in c++filt in bintuils which leads to Undefined-behavior(OOM in this POC)
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:

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--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 83472.

*** This bug has been marked as a duplicate of bug 83472 ***
>From gcc-bugs-return-619738-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 06:47:33 2018
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Subject: [Bug demangler/83472] Signed Integer Overflow - 38176028
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:

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                 CC|                            |wcventure at 126 dot com

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 87602 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-619739-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 06:55:00 2018
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Subject: [Bug demangler/85660] Signed Integer Overflow (79257474)
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:

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--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup.

*** This bug has been marked as a duplicate of bug 83472 ***
>From gcc-bugs-return-619740-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 06:55:00 2018
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83472

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 85660 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-619742-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 06:59:05 2018
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Subject: [Bug demangler/79111] demangle_template tries to allocate 18446744070799748648 bytes
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:

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                 CC|                            |security-tps at google dot com

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 83472 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-619743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 06:59:06 2018
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Subject: [Bug demangler/87602] Integer Overflow in cplus-dem.c in c++filt in bintuils which leads to Undefined-behavior(OOM in this POC)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87602
Bug 87602 depends on bug 83472, which changed state.

Bug 83472 Summary: Signed Integer Overflow - 38176028
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83472

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE
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Subject: [Bug demangler/83472] Signed Integer Overflow - 38176028
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83472

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

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--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup.

*** This bug has been marked as a duplicate of bug 79111 ***
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Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ABI
                 CC|                            |rguenth at gcc dot gnu.org
             Blocks|                            |86751
   Target Milestone|---                         |7.4
            Summary|[regression 6/7/8/9] Binary |[6/7/8/9 Regression] Binary
                   |incompatibility in          |incompatibility in
                   |std::pair introduced by PR  |std::pair introduced by PR
                   |86751                       |86751


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86751
[Bug 86751] [6/7/8 Regression] Ambiguous operator= overload for std::pair<T1,
T2>
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Subject: [Bug rtl-optimization/87817] [9 Regression] gcc.target/i386/bmi2-bzhi-2.c execution test
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87817

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug d/87824] New: x86_64-linux multilib issues
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87824

            Bug ID: 87824
           Summary: x86_64-linux multilib issues
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
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  Target Milestone: ---

I am seeing the following when testing with -m32 on x86_64-linux:

Running target unix//-m32
UNRESOLVED: runnable/cppa.d   compilation failed to produce executable
UNRESOLVED: runnable/cppa.d -g   compilation failed to produce executable
UNRESOLVED: runnable/cppa.d -g -shared-libphobos   compilation failed to
produce
 executable
UNRESOLVED: runnable/cppa.d -shared-libphobos   compilation failed to produce
ex
ecutable
FAIL: runnable/eh.d -O2   execution test
FAIL: runnable/eh.d -O2 -shared-libphobos   execution test
FAIL: runnable/nulltype.d   execution test
FAIL: runnable/nulltype.d -O2   execution test
FAIL: runnable/nulltype.d -O2 -shared-libphobos   execution test
FAIL: runnable/nulltype.d -g   execution test
FAIL: runnable/nulltype.d -g -O2   execution test
FAIL: runnable/nulltype.d -g -O2 -shared-libphobos   execution test
FAIL: runnable/nulltype.d -g -shared-libphobos   execution test
FAIL: runnable/nulltype.d -shared-libphobos   execution test
FAIL: runnable/template1.d   execution test
FAIL: runnable/template1.d -O2   execution test
FAIL: runnable/template1.d -O2 -frelease   execution test
FAIL: runnable/template1.d -O2 -frelease -shared-libphobos   execution test
FAIL: runnable/template1.d -O2 -shared-libphobos   execution test
FAIL: runnable/template1.d -frelease   execution test
FAIL: runnable/template1.d -frelease -shared-libphobos   execution test
FAIL: runnable/template1.d -g   execution test
FAIL: runnable/template1.d -g -O2   execution test
FAIL: runnable/template1.d -g -O2 -frelease   execution test
FAIL: runnable/template1.d -g -O2 -frelease -shared-libphobos   execution test
FAIL: runnable/template1.d -g -O2 -shared-libphobos   execution test
FAIL: runnable/template1.d -g -frelease   execution test
FAIL: runnable/template1.d -g -frelease -shared-libphobos   execution test
FAIL: runnable/template1.d -g -shared-libphobos   execution test
FAIL: runnable/template1.d -shared-libphobos   execution test

                === gdc Summary for unix//-m32 ===

# of expected passes            30511
# of unexpected failures        26
# of unresolved testcases       4


Running target unix//-m32
FAIL: libphobos.shared/loadDR.c -ldl -pthread -g execution test

                === libphobos Summary for unix//-m32 ===

# of expected passes            241
# of unexpected failures        1
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Subject: [Bug testsuite/87802] [9 regression] g++.dg/vect/slp-pr87105.cc fails starting with r265522
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87802

--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 31 08:48:59 2018
New Revision: 265655

URL: https://gcc.gnu.org/viewcvs?rev=265655&root=gcc&view=rev
Log:
2018-10-31  Richard Biener  <rguenther@suse.de>

        PR testsuite/87802
        * g++.dg/vect/slp-pr87105.cc: XFAIL for strict alignment targets.

Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/vect/slp-pr87105.cc
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug d/87825] New: profiledbootstrap is broken when D is enabled
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87825

            Bug ID: 87825
           Summary: profiledbootstrap is broken when D is enabled
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
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  Target Milestone: ---

[  564s]
/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/obj-x86_64-suse-linux/./prev-gcc/xg++
-B/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/obj-x86_64-suse-linux/./prev-gcc/
-B/usr/x86_64-suse-linux/bin/ -nostdinc++
-B/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/obj-x86_64-suse-linux/prev-x86_64-suse-linux/libstdc++-v3/src/.libs
-B/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/obj-x86_64-suse-linux/prev-x86_64-suse-linux/libstdc++-v3/libsupc++/.libs

-I/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/obj-x86_64-suse-linux/prev-x86_64-suse-linux/libstdc++-v3/include/x86_64-suse-linux

-I/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/obj-x86_64-suse-linux/prev-x86_64-suse-linux/libstdc++-v3/include
 -I/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/libstdc++-v3/libsupc++
-L/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/obj-x86_64-suse-linux/prev-x86_64-suse-linux/libstdc++-v3/src/.libs
-L/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/obj-x86_64-suse-linux/prev-x86_64-suse-linux/libstdc++-v3/libsupc++/.libs
 -static-libstdc++ -static-libgcc  -no-pie -o d/idgen d/idgen.dmdgen.o
[  564s] /usr/x86_64-suse-linux/bin/ld: d/idgen.dmdgen.o:(.data+0x40):
undefined reference to `__gcov_merge_add'
[  564s] /usr/x86_64-suse-linux/bin/ld: d/idgen.dmdgen.o:(.data+0x78):
undefined reference to `__gcov_merge_time_profile'
[  564s] /usr/x86_64-suse-linux/bin/ld: d/idgen.dmdgen.o: in function `main':
[  564s] idgen.c:(.text.startup+0x9): undefined reference to
`__gcov_indirect_call'
[  564s] /usr/x86_64-suse-linux/bin/ld: idgen.c:(.text.startup+0x1b): undefined
reference to `__gcov_indirect_call_profiler_v2'
[  564s] /usr/x86_64-suse-linux/bin/ld: idgen.c:(.text.startup+0x34): undefined
reference to `__gcov_time_profiler_counter'
[  564s] /usr/x86_64-suse-linux/bin/ld: idgen.c:(.text.startup+0x46): undefined
reference to `__gcov_time_profiler_counter'
[  564s] /usr/x86_64-suse-linux/bin/ld: d/idgen.dmdgen.o: in function
`_GLOBAL__sub_I_00100_0_msgtable':
[  564s] idgen.c:(.text.startup+0x606): undefined reference to `__gcov_init'
[  564s] /usr/x86_64-suse-linux/bin/ld: d/idgen.dmdgen.o: in function
`_GLOBAL__sub_D_00100_1_msgtable':
[  564s] idgen.c:(.text.exit+0x1): undefined reference to `__gcov_exit'
[  564s] collect2: error: ld returned 1 exit status
[  564s] make[3]: *** [../../gcc/d/Make-lang.in:320: d/idgen] Error 1
[  564s] make[3]: *** Waiting for unfinished jobs....
[  564s] make[3]: Leaving directory
'/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/obj-x86_64-suse-linux/gcc'
[  564s] make[2]: *** [Makefile:4811: all-stageprofile-gcc] Error 2
[  564s] make[2]: Leaving directory
'/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/obj-x86_64-suse-linux'
[  564s] make[1]: *** [Makefile:22352: stageprofile-bubble] Error 2
[  564s] make[1]: Leaving directory
'/home/abuild/rpmbuild/BUILD/gcc-9.0.0+r265655/obj-x86_64-suse-linux'
[  564s] make: *** [Makefile:22606: profiledbootstrap] Error 2
>From gcc-bugs-return-619750-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 09:31:43 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87826] New: ubsan: gimple-ssa-store-merging.c:281
Date: Wed, 31 Oct 2018 09:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87826

            Bug ID: 87826
           Summary: ubsan: gimple-ssa-store-merging.c:281
           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
  Target Milestone: ---

$ ../results.265631.ubsan/bin/gcc -c -O3 bug472.c
../../trunk/gcc/gimple-ssa-store-merging.c:281:12: runtime error: shift
exponent 64 is too large for 64-bit type 'long unsigned int'
$ 

For this C code:

typedef a;
*b;
c;
d() {
  a e, f = 8 + 8;
  e = 0;
  for (; e < f; ++e)
    b[e] = c >> e * 8;
}

The bug seems to be sometime before revision 264725.
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Subject: [Bug c/87826] ubsan: gimple-ssa-store-merging.c:281
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87826

David Binderman <dcb314 at hotmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
svn blame says

254947      jakub       n->n >>= count;
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Subject: [Bug d/87799] failure during bootstrap, fails to build d/filename.o
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87799

--- Comment #1 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Wed Oct 31 09:44:31 2018
New Revision: 265658

URL: https://gcc.gnu.org/viewcvs?rev=265658&root=gcc&view=rev
Log:
ChangeLog:

2018-10-31  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR bootstrap/87788
        PR d/87799
        * configure: Rebuild.
        * configure.ac: Disable D on systems where it is known not to work.

libphobos/ChangeLog:

2018-10-31  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR bootstrap/87789
        PR d/87818
        PR d/87819
        * configure.tgt: New file.

Added:
    trunk/libphobos/configure.tgt
Modified:
    trunk/ChangeLog
    trunk/configure
    trunk/configure.ac
    trunk/libphobos/ChangeLog
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Subject: [Bug d/87789] D does not build on powerpc64-linux
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87789

--- Comment #3 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Wed Oct 31 09:44:31 2018
New Revision: 265658

URL: https://gcc.gnu.org/viewcvs?rev=265658&root=gcc&view=rev
Log:
ChangeLog:

2018-10-31  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR bootstrap/87788
        PR d/87799
        * configure: Rebuild.
        * configure.ac: Disable D on systems where it is known not to work.

libphobos/ChangeLog:

2018-10-31  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR bootstrap/87789
        PR d/87818
        PR d/87819
        * configure.tgt: New file.

Added:
    trunk/libphobos/configure.tgt
Modified:
    trunk/ChangeLog
    trunk/configure
    trunk/configure.ac
    trunk/libphobos/ChangeLog
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Subject: [Bug d/87818] D runtime does not build on FreeBSD.
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--- Comment #2 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Wed Oct 31 09:44:31 2018
New Revision: 265658

URL: https://gcc.gnu.org/viewcvs?rev=265658&root=gcc&view=rev
Log:
ChangeLog:

2018-10-31  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR bootstrap/87788
        PR d/87799
        * configure: Rebuild.
        * configure.ac: Disable D on systems where it is known not to work.

libphobos/ChangeLog:

2018-10-31  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR bootstrap/87789
        PR d/87818
        PR d/87819
        * configure.tgt: New file.

Added:
    trunk/libphobos/configure.tgt
Modified:
    trunk/ChangeLog
    trunk/configure
    trunk/configure.ac
    trunk/libphobos/ChangeLog
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Subject: [Bug d/87819] failure during bootstrap, fails to build libdruntime
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87819

--- Comment #1 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Wed Oct 31 09:44:31 2018
New Revision: 265658

URL: https://gcc.gnu.org/viewcvs?rev=265658&root=gcc&view=rev
Log:
ChangeLog:

2018-10-31  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR bootstrap/87788
        PR d/87799
        * configure: Rebuild.
        * configure.ac: Disable D on systems where it is known not to work.

libphobos/ChangeLog:

2018-10-31  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR bootstrap/87789
        PR d/87818
        PR d/87819
        * configure.tgt: New file.

Added:
    trunk/libphobos/configure.tgt
Modified:
    trunk/ChangeLog
    trunk/configure
    trunk/configure.ac
    trunk/libphobos/ChangeLog
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Subject: [Bug bootstrap/87788] [9 Regression] Bootstrap fails for x86_64-apple-darwin* with default languages selection after D addition.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87788

--- Comment #12 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Wed Oct 31 09:44:31 2018
New Revision: 265658

URL: https://gcc.gnu.org/viewcvs?rev=265658&root=gcc&view=rev
Log:
ChangeLog:

2018-10-31  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR bootstrap/87788
        PR d/87799
        * configure: Rebuild.
        * configure.ac: Disable D on systems where it is known not to work.

libphobos/ChangeLog:

2018-10-31  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR bootstrap/87789
        PR d/87818
        PR d/87819
        * configure.tgt: New file.

Added:
    trunk/libphobos/configure.tgt
Modified:
    trunk/ChangeLog
    trunk/configure
    trunk/configure.ac
    trunk/libphobos/ChangeLog
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Subject: [Bug c/87826] ubsan: gimple-ssa-store-merging.c:281
Date: Wed, 31 Oct 2018 09:57:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87826

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2018-10-31
           Assignee|unassigned at gcc dot gnu.org      |jakub at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Cleaned up:
int c;

void
foo (int *b)
{
  int e;
  for (e = 0; e < 16; ++e)
    b[e] = c >> e * 8;
}

The testcase with UB in it if the function is ever called has the loop unrolled
by cunroll and we end up with out of bound shifts.  Store-merging should just
punt in that case.
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Subject: [Bug target/87374] [8/9 Regression] ICE in extract_insn, at recog.c:2305
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87374

--- Comment #5 from Thomas Preud'homme <thopre01 at gcc dot gnu.org> ---
Author: thopre01
Date: Wed Oct 31 10:05:54 2018
New Revision: 265662

URL: https://gcc.gnu.org/viewcvs?rev=265662&root=gcc&view=rev
Log:
Fix PR87374: ICE with -mslow-flash-data and -mword-relocations

GCC ICEs under -mslow-flash-data and -mword-relocations because there
is no way to load an address, both literal pools and MOVW/MOVT being
forbidden. This patch gives an error message when both options are
specified by the user and adds the according dg-skip-if directives for
tests that use either of these options. It also explicitely set the
option when in PIC mode as per documentation rather than always check
for target_word_relocation together with flag_pic.

2018-10-31  Thomas Preud'homme  <thomas.preudhomme@linaro.org>

    gcc/
    PR target/87374
    * config/arm/arm.c (arm_option_check_internal): Disable the combined
    use of -mslow-flash-data and -mword-relocations.
    (arm_option_override): Enable -mword-relocations if -fpic or -fPIC.
    * config/arm/arm.md (SYMBOL_REF MOVT splitter): Stop checking for
    flag_pic.
    * doc/invoke.texi (-mword-relocations): Mention conflict with
    -mslow-flash-data.
    (-mslow-flash-data): Reciprocally.

    gcc/testsuite/
    PR target/87374
    * gcc.target/arm/movdi_movt.c: Skip if both -mslow-flash-data and
    -mword-relocations would be passed when compiling the test.
    * gcc.target/arm/movsi_movt.c: Likewise.
    * gcc.target/arm/pr81863.c: Likewise.
    * gcc.target/arm/thumb2-slow-flash-data-1.c: Likewise.
    * gcc.target/arm/thumb2-slow-flash-data-2.c: Likewise.
    * gcc.target/arm/thumb2-slow-flash-data-3.c: Likewise.
    * gcc.target/arm/thumb2-slow-flash-data-4.c: Likewise.
    * gcc.target/arm/thumb2-slow-flash-data-5.c: Likewise.
    * gcc.target/arm/tls-disable-literal-pool.c: Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arm/arm.c
    trunk/gcc/config/arm/arm.md
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/arm/movdi_movt.c
    trunk/gcc/testsuite/gcc.target/arm/movsi_movt.c
    trunk/gcc/testsuite/gcc.target/arm/pr81863.c
    trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data-1.c
    trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data-2.c
    trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data-3.c
    trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data-4.c
    trunk/gcc/testsuite/gcc.target/arm/thumb2-slow-flash-data-5.c
    trunk/gcc/testsuite/gcc.target/arm/tls-disable-literal-pool.c
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Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
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Jonathan Wakely <redi at gcc dot gnu.org> changed:

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--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Argh, dammit. Yes, it should have been a template.
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Romain Geissler from comment #0)
> (introduce a new
> tagged std::pair type and provide dual abi ?).

No, no, no! Anything but that.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The fix isn't in any other releases yet, only 6.5
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Subject: [Bug tree-optimization/87826] ubsan: gimple-ssa-store-merging.c:281
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87826

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44935
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44935&action=edit
gcc9-pr87826.patch

Untested fix.
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Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
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Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #4)
> The fix isn't in any other releases yet, only 6.5

Unfortunate :/  Can you add a 6.5 specific note to 6.5/changes.html?

How pervasive is this issue?
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Subject: [Bug bootstrap/87788] [9 Regression] Bootstrap fails for x86_64-apple-darwin* with default languages selection after D addition.
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--- Comment #13 from Iain Sandoe <iains at gcc dot gnu.org> ---
bootstrap succeeded on x86_64-darwin16 --enable-languages=all for 265659.

Shall we leave this PR open as a place to track getting D working on Darwin?
.. or open a new one?

(I guess from the point of view of archeology, the latter might be better than
re-classifying this one to 'target').
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug d/87827] New: libgphobos.spec in the wrong place with --enable-version-specific-runtime-libs
Date: Wed, 31 Oct 2018 11:21:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87827

            Bug ID: 87827
           Summary: libgphobos.spec in the wrong place with
                    --enable-version-specific-runtime-libs
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

It ends up in /usr/lib* while it should be in /usr/lib*/gcc/$target/$version/
instead (where for example libgomp.spec ends up).  libgomp uses
toolexeclib_HEADERS for this.  I see libphobos does so as well so that's not
enough it seems.  See the enable_version_specific_runtime_libs handling in
configure of libgomp, libphobos lacks handling completely it seems.
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Subject: [Bug c++/87828] New: g++ crashes in sizeof within lambda (ice-on-valid)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87828

            Bug ID: 87828
           Summary: g++ crashes in sizeof within lambda (ice-on-valid)
           Product: gcc
           Version: 7.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: janniksilvanus at gmail dot com
  Target Milestone: ---

: g++-7 --version
g++-7 (SUSE Linux) 7.3.1 20180817 [gcc-7-branch revision 263612]
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 test.ii

struct Test {
   Test();
   Test(Test &);
   int getint();
};

template <typename Applier>
void call_applier(Applier && f) {
   f(int());
}

Test run() {
   Test test;
   call_applier([=](auto) {
      sizeof(test.getint());
   });
   return test;
}


: g++-7 -std=c++1z -Wmissing-format-attribute -c test.ii
test.ii: In instantiation of â€˜run()::<lambda(auto:1)> [with auto:1 = int]â€™:     
test.ii:9:5:   required from â€˜void call_applier(Applier&&) [with Applier =
run()::<lambda(auto:1)>]â€™  
test.ii:16:5:   required from here
test.ii:15:25: internal compiler error: Segmentation fault
       sizeof(test.getint());
             ~~~~~~~~~~~~^~~
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugs.opensuse.org/> for instructions.

Note the weird -Wmissing-format-attribute flag which is required to trigger the
crash, although it seems to be completely unrelated.
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Subject: [Bug c++/87828] g++ crashes in sizeof within lambda (ice-on-valid)
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Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-10-31
                 CC|                            |jason at gcc dot gnu.org,
                   |                            |marxin at gcc dot gnu.org
      Known to work|                            |6.4.0, 8.2.0, 9.0
   Target Milestone|---                         |7.4
     Ever confirmed|0                           |1
      Known to fail|                            |7.3.0

--- Comment #1 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Confirmed, only GCC-7 branch is affected. Fixed on trunk in r236615.
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Subject: [Bug ada/40025] gnatmake does not honour project files' Library_Version exactly
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Nicolas Boulenguez <nicolas.boulenguez at free dot fr> changed:

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----------------------------------------------------------------------------
                 CC|                            |nicolas.boulenguez at free dot fr

--- Comment #2 from Nicolas Boulenguez <nicolas.boulenguez at free dot fr> ---
Hello.
Gcc-9 stops supporting GPR projects, and gprbuild uses the given Shared Object
name.
Does anyone object to close this bug and remove
ada-library-project-files-soname.diff from the Debian packaging?
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Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
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Jonathan Wakely <redi at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It only affects std::pair<std::pair<x, y>, z> (for any x, y, z) i.e. when the
first member of the pair is also a pair.
>From gcc-bugs-return-619770-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 11:43:12 2018
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Subject: [Bug ada/40025] gnatmake does not honour project files' Library_Version exactly
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Arnaud Charlet <charlet at gcc dot gnu.org> changed:

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--- Comment #3 from Arnaud Charlet <charlet at gcc dot gnu.org> ---
Good point, closing PR.
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Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
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--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> Unfortunate :/  Can you add a 6.5 specific note to 6.5/changes.html?

Will do.

I think it would also be good to commit the fix to the gcc-6-branch, even if
it's closed, so it can be picked up from there if needed.

Do we even want to consider a 6.6 release, or just officially bless a 6.5.1
snapshot post-fix?
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Subject: [Bug web/87829] New: Contradiction about -fReorder-Blocks
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            Bug ID: 87829
           Summary: Contradiction about -fReorder-Blocks
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: web
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  Target Milestone: ---

On this page: https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html
(invoke.texi)
It says:

@option{-Os} disables the following optimization flags:
@gccoptlist{-falign-functions  -falign-jumps  -falign-loops @gol
-falign-labels  -freorder-blocks  -freorder-blocks-algorithm=stc @gol
-freorder-blocks-and-partition  -fprefetch-loop-arrays}

If you scroll down, it says:

@item -freorder-blocks
@opindex freorder-blocks
Reorder basic blocks in the compiled function in order to reduce number of
taken branches and improve code locality.

Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os}.

Is it enabled in -Os or not? They contradict.

Also for -freorder-blocks-algorithm and -freorder-blocks-and-partition
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
Date: Wed, 31 Oct 2018 11:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #25 from Terry Guo <xuepeng.guo at intel dot com> ---
Debugged the ICE further and found that below line in function
ix86_get_drap_rtx is causing ICE:

12050         insn = emit_insn_before (seq, NEXT_INSN (entry_of_function ()));

It is called when generating call to __asan_stack_free_5 via
emit_library_call_value_1. The entry_of_function() is returned something
invalid.
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Subject: [Bug tree-optimization/86270] [8/9 Regression] Simple loop needs an extra register and an extra instruction
Date: Wed, 31 Oct 2018 11:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86270

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 31 11:57:33 2018
New Revision: 265677

URL: https://gcc.gnu.org/viewcvs?rev=265677&root=gcc&view=rev
Log:
2018-10-31  Richard Biener  <rguenther@suse.de>

        PR middle-end/70359
        PR middle-end/86270
        * tree-outof-ssa.c (insert_backedge_copies): Restrict
        copy generation to useful cases.  Place the copy before
        the definition of the backedge value when possible.

        * gcc.target/i386/pr70359.c: New testcase.
        * gcc.target/i386/pr86270.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr70359.c
    trunk/gcc/testsuite/gcc.target/i386/pr86270.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-outof-ssa.c
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/70359] [7/8/9 Regression] Code size increase for x86/ARM/others compared to gcc-5.3.0
Date: Wed, 31 Oct 2018 11:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70359

--- Comment #47 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Oct 31 11:57:33 2018
New Revision: 265677

URL: https://gcc.gnu.org/viewcvs?rev=265677&root=gcc&view=rev
Log:
2018-10-31  Richard Biener  <rguenther@suse.de>

        PR middle-end/70359
        PR middle-end/86270
        * tree-outof-ssa.c (insert_backedge_copies): Restrict
        copy generation to useful cases.  Place the copy before
        the definition of the backedge value when possible.

        * gcc.target/i386/pr70359.c: New testcase.
        * gcc.target/i386/pr86270.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr70359.c
    trunk/gcc/testsuite/gcc.target/i386/pr86270.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-outof-ssa.c
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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
Date: Wed, 31 Oct 2018 12:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822

--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 31 Oct 2018, redi at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822
> 
> --- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #5)
> > Unfortunate :/  Can you add a 6.5 specific note to 6.5/changes.html?
> 
> Will do.
> 
> I think it would also be good to commit the fix to the gcc-6-branch, even if
> it's closed, so it can be picked up from there if needed.

Hmm.  I think it may be better to provide the fix as patch, referenced
from the changes.html note?

> Do we even want to consider a 6.6 release, or just officially bless a 6.5.1
> snapshot post-fix?

Neither of that (there are no further snapshots from the branch anyways).
Since 6.5 isn't supported anymore I'd rather point people to 7.x.
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Subject: [Bug web/87829] Contradiction about -fReorder-Blocks
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87829

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |documentation
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   Last reconfirmed|                            |2018-10-31
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
These are two different but yes, the -freorder-blocks info looks wrong,
it is indeed enabled with -Os, thust the algorithm used is different.
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Subject: [Bug c++/87828] [7 Regression] g++ crashes in sizeof within lambda (ice-on-valid)
Date: Wed, 31 Oct 2018 12:19:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic,
                   |                            |ice-on-valid-code
           Priority|P3                          |P2
            Summary|g++ crashes in sizeof       |[7 Regression] g++ crashes
                   |within lambda               |in sizeof within lambda
                   |(ice-on-valid)              |(ice-on-valid)
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Subject: [Bug c++/87742] [7/8/9 Regression] false warning: array subscript 3 is above array bounds of 'const std::type_info* const [3]'
Date: Wed, 31 Oct 2018 12:21:00 -0000
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Subject: [Bug c++/78986] [7/8/9 Regression] template inner classes are not affected by access specifiers
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Subject: [Bug c++/80916] [7/8/9 Regression] Spurious "declared 'static' but never defined" warning
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Subject: [Bug tree-optimization/87776] [9 Regression] Compile time hog during RPO VN
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87776

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug target/24012] [7/8/9 regression] #define _POSIX_C_SOURCE breaks #include <iostream>
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24012

Richard Biener <rguenth at gcc dot gnu.org> changed:

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>From gcc-bugs-return-619787-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 12:23:42 2018
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Subject: [Bug c++/84191] [7 Regression] Compiler ICEs when trying to resolve impossible arithmetic operations
Date: Wed, 31 Oct 2018 12:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84191

Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug tree-optimization/87776] [9 Regression] Compile time hog during RPO VN
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87776

Richard Biener <rguenth at gcc dot gnu.org> changed:

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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine, somehow missed this.
>From gcc-bugs-return-619785-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 12:23:25 2018
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Subject: [Bug c++/87814] [9 Regression] ICE in in tsubst_copy, at cp/pt.c:15962 with range-v3
Date: Wed, 31 Oct 2018 12:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87814

Richard Biener <rguenth at gcc dot gnu.org> changed:

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>From gcc-bugs-return-619786-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 12:23:36 2018
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Subject: [Bug rtl-optimization/83972] [7 Regression] ICE in code_motion_process_successors, at sel-sched.c:6398
Date: Wed, 31 Oct 2018 12:23:00 -0000
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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>From gcc-bugs-return-619790-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 12:24:03 2018
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Subject: [Bug c/86420] [9 regression] nextafter(0x1p-1022,0) is constant folded
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86420

Richard Biener <rguenth at gcc dot gnu.org> changed:

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>From gcc-bugs-return-619794-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 12:25:32 2018
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Subject: [Bug c++/87366] [7/8/9 Regression] SFINAE trait as template parameter causes incorrect application of trait to other areas
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Subject: [Bug c++/85136] [7 Regression] ICE with array as template variable
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/86586] [7/8/9 Regression] -Wsign-compare affects code generation
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Jonathan Wakely <redi at gcc dot gnu.org> changed:

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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/86608] [7/8/9 Regression] volatile variable is taken as a constexpr
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822

--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Oct 31 12:29:02 2018
New Revision: 265678

URL: https://gcc.gnu.org/viewcvs?rev=265678&root=gcc&view=rev
Log:
PR libstdc++/87822 fix layout change for nested std::pair

The introduction of the empty __pair_base base class for PR 86751
changed the layout of std::pair<std::pair<...>, ...>. The outer pair and
its first member both have a base class of the same type, which cannot
exist at the same address. This causes the first member to be at a
non-zero offset.

The solution is to make the base class depend on the template
parameters, so that each pair type has a different base class type,
which allows the base classes of the outer pair and its first member to
have the same address.

        PR libstdc++/87822
        * include/bits/stl_pair.h (__pair_base): Change to class template.
        (pair): Make base class type depend on template parameters.
        * testsuite/20_util/pair/87822.cc: New test.

Added:
    trunk/libstdc++-v3/testsuite/20_util/pair/87822.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/stl_pair.h
>From gcc-bugs-return-619798-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 12:29:41 2018
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Subject: [Bug libstdc++/86751] [6/7/8 Regression] Ambiguous operator= overload for std::pair<T1, T2>
Date: Wed, 31 Oct 2018 12:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86751

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Oct 31 12:29:02 2018
New Revision: 265678

URL: https://gcc.gnu.org/viewcvs?rev=265678&root=gcc&view=rev
Log:
PR libstdc++/87822 fix layout change for nested std::pair

The introduction of the empty __pair_base base class for PR 86751
changed the layout of std::pair<std::pair<...>, ...>. The outer pair and
its first member both have a base class of the same type, which cannot
exist at the same address. This causes the first member to be at a
non-zero offset.

The solution is to make the base class depend on the template
parameters, so that each pair type has a different base class type,
which allows the base classes of the outer pair and its first member to
have the same address.

        PR libstdc++/87822
        * include/bits/stl_pair.h (__pair_base): Change to class template.
        (pair): Make base class type depend on template parameters.
        * testsuite/20_util/pair/87822.cc: New test.

Added:
    trunk/libstdc++-v3/testsuite/20_util/pair/87822.cc
Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/bits/stl_pair.h
>From gcc-bugs-return-619799-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 12:32:01 2018
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Subject: [Bug c/86420] [9 regression] nextafter(0x1p-1022,0) is constant folded
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86420

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822

--- Comment #10 from Romain Geissler <romain.geissler at amadeus dot com> ---
Thanks for the quick patch !

If no commit is planned in the branch 6, I am going to apply this patch on top
myself. I hope people do read the release notes to figure out about this
potential ABI breaking.
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Subject: [Bug web/87829] Contradiction about -fReorder-Blocks
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87829

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |marxin at gcc dot gnu.org
           Assignee|unassigned at gcc dot gnu.org      |marxin at gcc dot gnu.org

--- Comment #2 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Let me fix that.
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Subject: [Bug d/87827] libgphobos.spec in the wrong place with --enable-version-specific-runtime-libs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87827

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Actually it applies to all of the library, not only the .spec file.
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Subject: [Bug libstdc++/86751] [6/7/8 Regression] Ambiguous operator= overload for std::pair<T1, T2>
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86751

--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Oct 31 13:03:25 2018
New Revision: 265681

URL: https://gcc.gnu.org/viewcvs?rev=265681&root=gcc&view=rev
Log:
PR libstdc++/87822 fix layout change for nested std::pair

The introduction of the empty __pair_base base class for PR 86751
changed the layout of std::pair<std::pair<...>, ...>. The outer pair and
its first member both have a base class of the same type, which cannot
exist at the same address. This causes the first member to be at a
non-zero offset.

The solution is to make the base class depend on the template
parameters, so that each pair type has a different base class type,
which allows the base classes of the outer pair and its first member to
have the same address.

        PR libstdc++/87822
        * include/bits/stl_pair.h (__pair_base): Change to class template.
        (pair): Make base class type depend on template parameters.
        * testsuite/20_util/pair/87822.cc: New test.

Added:
    branches/gcc-8-branch/libstdc++-v3/testsuite/20_util/pair/87822.cc
Modified:
    branches/gcc-8-branch/libstdc++-v3/ChangeLog
    branches/gcc-8-branch/libstdc++-v3/include/bits/stl_pair.h
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Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822

--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Oct 31 13:03:25 2018
New Revision: 265681

URL: https://gcc.gnu.org/viewcvs?rev=265681&root=gcc&view=rev
Log:
PR libstdc++/87822 fix layout change for nested std::pair

The introduction of the empty __pair_base base class for PR 86751
changed the layout of std::pair<std::pair<...>, ...>. The outer pair and
its first member both have a base class of the same type, which cannot
exist at the same address. This causes the first member to be at a
non-zero offset.

The solution is to make the base class depend on the template
parameters, so that each pair type has a different base class type,
which allows the base classes of the outer pair and its first member to
have the same address.

        PR libstdc++/87822
        * include/bits/stl_pair.h (__pair_base): Change to class template.
        (pair): Make base class type depend on template parameters.
        * testsuite/20_util/pair/87822.cc: New test.

Added:
    branches/gcc-8-branch/libstdc++-v3/testsuite/20_util/pair/87822.cc
Modified:
    branches/gcc-8-branch/libstdc++-v3/ChangeLog
    branches/gcc-8-branch/libstdc++-v3/include/bits/stl_pair.h
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Subject: [Bug libstdc++/86751] [6/7/8 Regression] Ambiguous operator= overload for std::pair<T1, T2>
Date: Wed, 31 Oct 2018 13:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86751

--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Oct 31 13:16:10 2018
New Revision: 265683

URL: https://gcc.gnu.org/viewcvs?rev=265683&root=gcc&view=rev
Log:
PR libstdc++/87822 fix layout change for nested std::pair

The introduction of the empty __pair_base base class for PR 86751
changed the layout of std::pair<std::pair<...>, ...>. The outer pair and
its first member both have a base class of the same type, which cannot
exist at the same address. This causes the first member to be at a
non-zero offset.

The solution is to make the base class depend on the template
parameters, so that each pair type has a different base class type,
which allows the base classes of the outer pair and its first member to
have the same address.

        PR libstdc++/87822
        * include/bits/stl_pair.h (__pair_base): Change to class template.
        (pair): Make base class type depend on template parameters.
        * testsuite/20_util/pair/87822.cc: New test.

Added:
    branches/gcc-7-branch/libstdc++-v3/testsuite/20_util/pair/87822.cc
Modified:
    branches/gcc-7-branch/libstdc++-v3/ChangeLog
    branches/gcc-7-branch/libstdc++-v3/include/bits/stl_pair.h
>From gcc-bugs-return-619806-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 13:17:01 2018
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Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
Date: Wed, 31 Oct 2018 13:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822

--- Comment #12 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Wed Oct 31 13:16:10 2018
New Revision: 265683

URL: https://gcc.gnu.org/viewcvs?rev=265683&root=gcc&view=rev
Log:
PR libstdc++/87822 fix layout change for nested std::pair

The introduction of the empty __pair_base base class for PR 86751
changed the layout of std::pair<std::pair<...>, ...>. The outer pair and
its first member both have a base class of the same type, which cannot
exist at the same address. This causes the first member to be at a
non-zero offset.

The solution is to make the base class depend on the template
parameters, so that each pair type has a different base class type,
which allows the base classes of the outer pair and its first member to
have the same address.

        PR libstdc++/87822
        * include/bits/stl_pair.h (__pair_base): Change to class template.
        (pair): Make base class type depend on template parameters.
        * testsuite/20_util/pair/87822.cc: New test.

Added:
    branches/gcc-7-branch/libstdc++-v3/testsuite/20_util/pair/87822.cc
Modified:
    branches/gcc-7-branch/libstdc++-v3/ChangeLog
    branches/gcc-7-branch/libstdc++-v3/include/bits/stl_pair.h
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Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
Date: Wed, 31 Oct 2018 13:39:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822

--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 44936
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44936&action=edit
Patch for GCC 6.5

Fixed in the gcc-7 and gcc-8 branches.

This will not be fixed on gcc-6-branch, but for anybody who wants to apply it
locally, the patch for GCC 6.5 is attached, and reproduced here:

--- a/libstdc++-v3/include/bits/stl_pair.h
+++ b/libstdc++-v3/include/bits/stl_pair.h
@@ -187,7 +187,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   };
 #endif // C++11

-  class __pair_base
+  template<typename _U1, typename _U2> class __pair_base
   {
 #if __cplusplus >= 201103L
     template<typename _T1, typename _T2> friend struct pair;
@@ -206,7 +206,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
    */
   template<typename _T1, typename _T2>
     struct pair
-    : private __pair_base
+    : private __pair_base<_T1, _T2>
     {
       typedef _T1 first_type;    /// @c first_type is the first bound type
       typedef _T2 second_type;   /// @c second_type is the second bound type
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Subject: [Bug libstdc++/86751] [6/7/8 Regression] Ambiguous operator= overload for std::pair<T1, T2>
Date: Wed, 31 Oct 2018 13:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86751
Bug 86751 depends on bug 87822, which changed state.

Bug 87822 Summary: [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
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Subject: [Bug libstdc++/87822] [6/7/8/9 Regression] Binary incompatibility in std::pair introduced by PR 86751
Date: Wed, 31 Oct 2018 13:41:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87822

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
      Known to work|                            |6.4.0, 7.3.0, 8.2.0
         Resolution|---                         |FIXED
      Known to fail|                            |6.4.1, 7.3.1, 8.2.1, 9.0

--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
.
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Subject: [Bug libstdc++/84323] call_once uses TLS even when once_flag is set
Date: Wed, 31 Oct 2018 13:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84323

--- Comment #3 from Antony Polukhin <antoshkka at gmail dot com> ---
Just noted that libc++ already does this optimization:
https://godbolt.org/z/alw1sq

libc++ directly accesses the content of std::once_flag and skips all the thread
local accesses if call_once previously succeeded.
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Subject: [Bug lto/87830] [9 Regression] ICE in cp_var_mod_type_p at cp/cp-objcp-common.c:107 since r265638
Date: Wed, 31 Oct 2018 14:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87830

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2018-10-31
      Known to work|                            |8.2.0
           Assignee|unassigned at gcc dot gnu.org      |hubicka at gcc dot gnu.org
   Target Milestone|---                         |9.0
     Ever confirmed|0                           |1
      Known to fail|                            |9.0
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #26 from Terry Guo <xuepeng.guo at intel dot com> ---
Hi UroÅ¡:

I think I found why your proposed patch causes problem in Comment 23. It is all
about timing. The below code from patch is trying to set up DRAP reg in a
rather early stage when the function is not fully expanded to RTL.

+      if (crtl->drap_reg == NULL_RTX)
+       {
+         rtx drap_rtx = targetm.calls.get_drap_rtx ();

The targetm.calls.get_drap_rtx () will be hooked to ix86_get_drap_rtx () where
we will have code:

12046         drap_vreg = copy_to_reg (arg_ptr);
(gdb) 
12047         seq = get_insns ();
(gdb) 
12048         end_sequence ();
(gdb) 
12050         insn = emit_insn_before (seq, NEXT_INSN (entry_of_function ()));

At this stage, what returned from (entry_of_function ()) is actually GIMPLE
form of the function, not the RTL form we are expecting. Then NEXT_INSN
(something_in_gimple) goes wrong.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug lto/87830] New: [9 Regression] ICE in cp_var_mod_type_p at cp/cp-objcp-common.c:107 since r265638
Date: Wed, 31 Oct 2018 14:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87830

            Bug ID: 87830
           Summary: [9 Regression] ICE in cp_var_mod_type_p at
                    cp/cp-objcp-common.c:107 since r265638
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

Following code (isolated from Libreoffice) causes ICE:

$ cat ice.ii
template <typename a> void ap(a);
template <typename, typename> struct b { template <typename at> b(at); };
void av();
template <typename a, typename... ah> void aw(a, ah... ay) {
  auto az = [&] { ap(ay...); };
  (*(decltype(az) *)av)();
}
class e {
  void be();

public:
  template <typename bl, typename bm> void bn(b<bl, bm>) { aw(c, &e::be); }
  int c;
} d;
void bq() { d.bn(b<long, int>(1)); }

$ g++ -O -flto ice.ii -c
during GIMPLE pass: einline
ice.ii: In function â€˜aw<int, void (e::*)()>(int, void (e::*)())voidâ€™:
ice.ii:6:24: internal compiler error: Segmentation fault
    6 |   (*(decltype(az) *)av)();
      |   ~~~~~~~~~~~~~~~~~~~~~^~
0xb8852f crash_signal
        ../../gcc/toplev.c:325
0x63228c cp_var_mod_type_p(tree_node*, tree_node*)
        ../../gcc/cp/cp-objcp-common.c:107
0xdc7a73 variably_modified_type_p(tree_node*, tree_node*)
        ../../gcc/tree.c:9065
0xdc7f0d variably_modified_type_p(tree_node*, tree_node*)
        ../../gcc/tree.c:9006
0xbede4c remap_type(tree_node*, copy_body_data*)
        ../../gcc/tree-inline.c:600
0xbf320c copy_tree_body_r(tree_node**, int*, void*)
        ../../gcc/tree-inline.c:1304
0xdc6f65 walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
        ../../gcc/tree.c:11632
0xdc750e walk_tree_1(tree_node**, tree_node* (*)(tree_node**, int*, void*),
void*, hash_set<tree_node*, default_hash_traits<tree_node*> >*, tree_node*
(*)(tree_node**, int*, tree_node* (*)(tree_node**, int*, void*), void*,
hash_set<tree_node*, default_hash_traits<tree_node*> >*))
        ../../gcc/tree.c:11950
0xbee1a6 remap_decls
        ../../gcc/tree-inline.c:683
0xbef021 remap_block
        ../../gcc/tree-inline.c:714
0xbef0f1 remap_blocks
        ../../gcc/tree-inline.c:736
0xbf5142 expand_call_inline
        ../../gcc/tree-inline.c:4605
0xbf6904 gimple_expand_calls_inline
        ../../gcc/tree-inline.c:4886
0xbf6904 optimize_inline_calls(tree_node*)
        ../../gcc/tree-inline.c:5026
0x12e08c1 early_inliner(function*)
        ../../gcc/ipa-inline.c:2797
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87831] New: Guard variable is not eliminated when there's nothing to guard
Date: Wed, 31 Oct 2018 14:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87831

            Bug ID: 87831
           Summary: Guard variable is not eliminated when there's nothing
                    to guard
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: antoshkka at gmail dot com
  Target Milestone: ---

Consider the example:

struct base {
    base() {}
};

base& test() {
    static base val;
    return val;
}

For that example a lot of assembly is generated, including empty initialization
under the guard:

.L14:
     ; nothing to initialize
  mov edi, OFFSET FLAT:guard variable for test()::val
  call __cxa_guard_release
  mov eax, OFFSET FLAT:_ZZ4testvE3val
  add rsp, 8
  ret

Consider removing all the guard variable instructions if there's no
instructions for initialization.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87831

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-10-31
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.

Not so easy task though, the middle-end doesn't know __cxa_guard_* is
"special".
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87830

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, I hope we can play with eliding the type copying during inlining somehow
...
(making VLA types "incomplete" given their sizes have been gimplified and debug
info has been generated - well, not fully ...).
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Subject: [Bug target/87832] New: AMD pipeline models are very costly size-wise
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            Bug ID: 87832
           Summary: AMD pipeline models are very costly size-wise
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: amonakov at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64-*-*, i?86-*-*

Looking at i386 insn-automata.o, out of its 2.2M rodata size almost all is due
to very large tables for AMD CPU models. Note how znver additions are more than
half of overall size.

What is causing that and can it be improved?

2176 core2_core_transitions
2496 slm_base
2527 bdver3_load_min_issue_delay
2746 glm_base
3892 bdver1_fp_base
4261 insn_latency(rtx_insn*, rtx_insn*)
4444 bdver1_ieu_min_issue_delay
4492 geode_base
4608 bdver3_ieu_transitions
6402 bdver1_load_transitions
7862 athlon_fp_check
7862 athlon_fp_transitions
9433 internal_min_issue_delay(int, DFA_chip*)
10108 bdver3_load_transitions
10360 print_reservation(_IO_FILE*, rtx_insn*)::reservation_names
10498 geode_check
10498 geode_transitions
12575 athlon_fp_min_issue_delay
12599 internal_state_transition(int, DFA_chip*)
12742 btver2_fp_check
12742 btver2_fp_transitions
13896 slm_transitions
13896 slm_check
17776 bdver1_ieu_transitions
20068 bdver1_fp_check
20068 bdver1_fp_transitions
26208 slm_min_issue_delay
27244 bdver1_fp_min_issue_delay
28518 glm_transitions
28518 glm_check
33690 geode_min_issue_delay
46980 bdver3_fp_min_issue_delay
49428 glm_min_issue_delay
53730 btver2_fp_min_issue_delay
68160 znver1_ieu_min_issue_delay
93960 bdver3_fp_transitions
136320 znver1_ieu_transitions
428108 znver1_fp_min_issue_delay
856216 znver1_fp_transitions
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--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, the "easy" solution for this bug is to re-set the var_mod_type_p langhook
in free-lang-data (to the default, hook_bool_tree_tree_false).
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Subject: [Bug driver/83193] Help for invalid -march= options from cc1 omits -march=native on x86-64, arm. aarch64, output also inconsistent
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--- Comment #18 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Wed Oct 31 14:46:17 2018
New Revision: 265686

URL: https://gcc.gnu.org/viewcvs?rev=265686&root=gcc&view=rev
Log:
Provide extension hint for aarch64 target (PR driver/83193).

2018-10-31  Martin Liska  <mliska@suse.cz>

        PR driver/83193
        * common/config/aarch64/aarch64-common.c (aarch64_parse_extension):
        Add new argument invalid_extension.
        (aarch64_get_all_extension_candidates): New function.
        (aarch64_rewrite_selected_cpu): Add NULL to function call.
        * config/aarch64/aarch64-protos.h (aarch64_parse_extension): Add
        new argument.
        (aarch64_get_all_extension_candidates): New function.
        * config/aarch64/aarch64.c (aarch64_parse_arch): Add new
        argument invalid_extension.
        (aarch64_parse_cpu): Likewise.
        (aarch64_print_hint_for_extensions): New function.
        (aarch64_validate_mcpu): Provide hint about invalid extension.
        (aarch64_validate_march): Likewise.
        (aarch64_handle_attr_arch): Pass new argument.
        (aarch64_handle_attr_cpu): Provide hint about invalid extension.
        (aarch64_handle_attr_isa_flags): Likewise.
2018-10-31  Martin Liska  <mliska@suse.cz>

        PR driver/83193
        * gcc.target/aarch64/spellcheck_7.c: New test.
        * gcc.target/aarch64/spellcheck_8.c: New test.
        * gcc.target/aarch64/spellcheck_9.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/aarch64/spellcheck_7.c
    trunk/gcc/testsuite/gcc.target/aarch64/spellcheck_8.c
    trunk/gcc/testsuite/gcc.target/aarch64/spellcheck_9.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/common/config/aarch64/aarch64-common.c
    trunk/gcc/config/aarch64/aarch64-protos.h
    trunk/gcc/config/aarch64/aarch64.c
    trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c/87806] Option -Wall should warn about unused structs, typdefs, enums, etc
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Tavian Barnes <tavianator at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tavianator at gmail dot com

--- Comment #4 from Tavian Barnes <tavianator at gmail dot com> ---
Perhaps this is reasonable for types that are defined in the file itself, not
in an included header?
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Subject: [Bug driver/83193] Help for invalid -march= options from cc1 omits -march=native on x86-64, arm. aarch64, output also inconsistent
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Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |NEW
           Assignee|marxin at gcc dot gnu.org          |unassigned at gcc dot gnu.org

--- Comment #19 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
The only missing pieces are 2c) and 3b). Which should leverage the new target
hook targetm_common.get_valid_option_values and provide list of possible
values.
I'm leaving that to ARM and aarch64 folks.
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--- Comment #27 from David Grayson <davidegrayson at gmail dot com> ---
Thanks to everyone who is working on this.  I can confirm that the patch in
comment #20 by UroÅ¡ Bizjak applies cleanly to GCC 7.3.0, and I successfully
used the resulting toolchain targeting i686-w64-mingw32 to build Qt and several
Qt GUI examples, all of which run correctly.

Just in case it helps you find more bugs: I noticed there are several other
places in the code (of gcc-8-20181019) where ctrl->preferred_stack_boundary
gets updated without any obvious update of ctrl->stack_alignment_needed:

gcc/explow.c:1247 in get_dynamic_stack_size
gcc/explow.c:1595 in get_dynamic_stack_base
gcc/calls.c:3811 in expand_call
gcc/config/i386/i386.c:12593 in ix86_update_stack_boundary
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Subject: [Bug c++/82019] [concepts] ICE if concept is not satisfied
Date: Wed, 31 Oct 2018 16:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82019

--- Comment #1 from Antony Polukhin <antoshkka at gmail dot com> ---
Trunk version of GCC (9.0) does not ICE any more.

This issue could be closed (but I'd appreciate if you could add example from
above to the test suite to avoid regressions).
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Subject: [Bug target/87833] New: Intel MIC (emulated) offloading: "relocation [...] can not be used when making a shared object; recompile with -fPIC"
Date: Wed, 31 Oct 2018 17:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87833

            Bug ID: 87833
           Summary: Intel MIC (emulated) offloading: "relocation [...] can
                    not be used when making a shared object; recompile
                    with -fPIC"
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: openmp
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tschwinge at gcc dot gnu.org
                CC: hubicka at gcc dot gnu.org, iverbin at gcc dot gnu.org,
                    jakub at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64-intelmicemul-linux-gnu

Created attachment 44937
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44937&action=edit
WIP patch/work around

Commit r263988 (for PR86517 "relocation R_X86_64_32 against `.rodata.str1.1'
can not be used when making a shared object with LTO") makes a lot of (or even
all?) Intel MIC offloading test cases fail to compile:

    [...]/ld: /tmp/ccCCZyfF.o: relocation R_X86_64_32S against `[...]' can not
be used when making a shared object; recompile with -fPIC
    /tmp/ccCCZyfF.o: error adding symbols: Bad value
    mkoffload-intelmic: fatal error: [...]

I have not yet analyzed what's actually going wrong.  Before spending more time
on this, I first wanted to make sure that's still useful -- given that in the
past two months apparently nobody but me has run into this (or didn't bother to
report it), and I thus wonder whether anyone but me is still testing Intel MIC
(emulated) offloading?

No idea yet if the attached patch/hack is correct in any way, but it at least
restores Intel MIC (emulated) offloading compilation.
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Subject: [Bug bootstrap/82856] --enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82856

--- Comment #10 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Author: jsm28
Date: Wed Oct 31 17:03:16 2018
New Revision: 265695

URL: https://gcc.gnu.org/viewcvs?rev=265695&root=gcc&view=rev
Log:
Update GCC to autoconf 2.69, automake 1.15.1 (PR bootstrap/82856).

This patch updates GCC to use autoconf 2.69 and automake 1.15.1.
(That's not the latest automake version, but it's the one used by
binutils-gdb, with which consistency is desirable, and in any case
seems a useful incremental update that should make a future update to
1.16.1 easier.)

The changes are generally similar to the binutils-gdb ones, and are
copied from there where shared files and directories are involved
(there are some further changes to such shared directories, however,
which I'd expect to apply to binutils-gdb once this patch is in GCC).
Largely, obsolete AC_PREREQ calls are removed, while many
AC_LANG_SOURCE calls are added to avoid warnings from aclocal and
autoconf.  Multilib support is no longer included in core automake,
meaning that multilib.am needs copying from automake's contrib
directory into the GCC source tree.  Autoconf 2.69 has Go support, so
local copies of that support are removed.  I hope the D support will
soon be submitted to upstream autoconf so the local copy of that can
be removed in a future update.  Changes to how automake generates
runtest calls mean quotes are removed from RUNTEST definitions in five
lib*/testsuite/Makefile.am files (libatomic, libgomp, libitm,
libphobos, libvtv; some others have RUNTEST definitions without
quotes, which are still OK); libgo and libphobos also get
-Wno-override added to AM_INIT_AUTOMAKE so those overrides of RUNTEST
do not generate automake warnings.

Note that the regeneration did not include regeneration of
fixincludes/config.h.in (attempting such regeneration resulted in all
the USED_FOR_TARGET conditionals disappearing; and I don't see
anything in the fixincludes/ directory that would result in such
conditionals being generated, unlike in the gcc/ directory).  Also
note that libvtv/testsuite/other-tests/Makefile.in was not
regenerated; that directory is not listed as a subdirectory for which
Makefile.in gets regenerated by calling "automake" in libvtv/, so I'm
not sure how it's meant to be regenerated.

While I mostly fixed warnings should running aclocal / automake /
autoconf, there were various such warnings from automake in the
libgfortran, libgo, libgomp, liboffloadmic, libsanitizer, libphobos
directories that I did not fix, preferring to leave those to the
relevant subsystem maintainers.  Specifically, most of those warnings
were of the following form (example from libgfortran):

Makefile.am:48: warning: source file 'caf/single.c' is in a subdirectory,
Makefile.am:48: but option 'subdir-objects' is disabled
automake: warning: possible forward-incompatibility.
automake: At least a source file is in a subdirectory, but the 'subdir-objects'
automake: automake option hasn't been enabled.  For now, the corresponding
output
automake: object file(s) will be placed in the top-level directory.  However,
automake: this behaviour will change in future Automake versions: they
will
automake: unconditionally cause object files to be placed in the same
subdirectory
automake: of the corresponding sources.
automake: You are advised to start using 'subdir-objects' option throughout
your
automake: project, to avoid future incompatibilities.

I think it's best for the relevant maintainers to add subdir-objects
and do any other associated Makefile.am changes needed.  In some cases
the paths in the warnings involved ../; I don't know if that adds any
extra complications to the use of subdir-objects.

I've tested this with native, cross and Canadian cross builds.  The
risk of any OS-specific issues should I hope be rather lower than if a
libtool upgrade were included (we *should* do such an upgrade at some
point, but it's more complicated - it involves identifying all our
local libtool changes to see if any aren't included in the upstream
version we update to, and reverting an upstream libtool patch that's
inappropriate for use in GCC); I think it would be better to get this
update into GCC so that people can test in different configurations
and we can fix any issues found, rather than to try to get more and
more testing done before it goes in.

top level:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * multilib.am: New file.  From automake.

        Merge from binutils-gdb:
        2018-06-19  Simon Marchi  <simon.marchi@ericsson.com>

        * libtool.m4: Use AC_LANG_SOURCE.
        * configure.ac: Remove AC_PREREQ, use AC_LANG_SOURCE.
        * ar-lib: New file.
        * test-driver: New file.
        * configure: Re-generate.

config:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * math.m4, tls.m4: Use AC_LANG_SOURCE.

        Merge from binutils-gdb:
        2018-06-19  Simon Marchi  <simon.marchi@ericsson.com>

        * override.m4 (_GCC_AUTOCONF_VERSION): Bump from 2.64 to 2.69.

fixincludes:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * configure.ac: Remove AC_PREREQ.
        * aclocal.m4, configure: Regenerate.

gcc:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * configure.ac: Remove AC_PREREQ.  Use AC_LANG_SOURCE.  Use single
        line for second argument of AC_DEFINE_UNQUOTED.
        * doc/install.texi (Tools/packages necessary for modifying GCC):
        Update to autoconf 2.69 and automake 1.15.1.
        * aclocal.m4, config.in, configure: Regenerate.

gnattools:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * configure.ac: Remove AC_PREREQ.
        * configure: Regenerate.

gotools:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * config/go.m4: Remove file.
        * Makefile.am (ACLOCAL_AMFLAGS): Do not use -I ./config.
        * configure.ac:  Remove AC_PREREQ.  Do not include config/go.m4.
        * Makefile.in, aclocal.m4, configure: Regenerate.

intl:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        Merge from binutils-gdb:
        2018-06-19  Simon Marchi  <simon.marchi@ericsson.com>

        * configure.ac: Add AC_USE_SYSTEM_EXTENSIONS, remove AC_PREREQ.
        * configure: Re-generate.
        * config.h.in: Re-generate.
        * aclocal.m4: Re-generate.

libada:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * configure.ac: Remove AC_PREREQ.
        * configure: Regenerate.

libatomic:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        * acinclude.m4: Use AC_LANG_SOURCE.
        * configure.ac: Remove AC_PREREQ.
        * testsuite/Makefile.am (RUNTEST): Remove quotes.
        * Makefile.in, aclocal.m4, configure, testsuite/Makefile.in:
        Regenerate.

libbacktrace:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        * configure.ac: Remove AC_PREREQ.  Use AC_LANG_SOURCE.
        * Makefile.in, aclocal.m4, config.h.in, configure: Regenerate.

libcc1:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * configure.ac: Remove AC_PREREQ.
        * Makefile.in, aclocal.m4, configure: Regenerate.

libcpp:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * configure.ac: Remove AC_PREREQ.  Use AC_LANG_SOURCE.
        * aclocal.m4, config.in, configure: Regenerate.

libdecnumber:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        Merge from binutils-gdb:
        2018-06-19  Simon Marchi  <simon.marchi@ericsson.com>

        * configure.ac: Remove AC_PREREQ.
        * configure: Re-generate.
        * aclocal.m4.

libffi:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        (AUTOMAKE_OPTIONS): Add info-in-builddir.
        (CLEANFILES): Remove doc/libffi.info.
        * configure.ac: Remove AC_PREREQ.
        * Makefile.in, aclocal.m4, configure, fficonfig.h.in,
        include/Makefile.in, man/Makefile.in, testsuite/Makefile.in:
        Regenerate.

libgcc:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * configure.ac: Remove AC_PREREQ.  Use AC_LANG_SOURCE.
        * configure: Regenerate.

libgfortran:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        * configure.ac: Remove AC_PREREQ.
        * Makefile.in, aclocal.m4, config.h.in, configure: Regenerate.

libgo [logically part of this change but omitted from the commit]:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        * config/go.m4: Remove file.
        * config/libtool.m4: Use AC_LANG_SOURCE.
        * configure.ac: Remove AC_PREREQ.  Use AC_LANG_SOURCE.  Use
        -Wno-override in AM_INIT_AUTOMAKE call.
        * Makefile.in, aclocal.m4, configure, testsuite/Makefile.in:
        Regenerate.

libgomp:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am
        (AUTOMAKE_OPTIONS): Add info-in-builddir.
        (CLEANFILES): Remove libgomp.info.
        * configure.ac: Remove AC_PREREQ.
        * testsuite/Makefile.am (RUNTEST): Remove quotes.
        * Makefile.in, aclocal.m4, configure, testsuite/Makefile.in:
        Regenerate.

libhsail-rt:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * configure.ac: Remove AC_PREREQ.
        * Makefile.in, aclocal.m4, configure: Regenerate.

libiberty:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        Merge from binutils-gdb:
        2018-06-19  Simon Marchi  <simon.marchi@ericsson.com>

        * configure.ac: Remove AC_PREREQ.
        * configure: Re-generate.
        * config.in: Re-generate.

libitm:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        (AUTOMAKE_OPTIONS): Add info-in-builddir.
        (CLEANFILES): Remove libitm.info.
        * configure.ac: Remove AC_PREREQ.
        * testsuite/Makefile.am (RUNTEST): Remove quotes.
        * Makefile.in, aclocal.m4, configure, testsuite/Makefile.in:
        Regenerate.

libobjc:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * configure.ac: Remove AC_PREREQ.
        * aclocal.m4, config.h.in, configure: Regenerate.

liboffloadmic:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        * configure.ac: Remove AC_PREREQ.
        * plugin/Makefile.am: Include multilib.am.
        * plugin/configure.ac: Remove AC_PREREQ.
        * Makefile.in, aclocal.m4, configure, plugin/Makefile.in,
        plugin/aclocal.m4, plugin/configure: Regenerate.

libphobos:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        * configure.ac: Remove AC_PREREQ.  Use -Wno-override in
        AM_INIT_AUTOMAKE call.
        * m4/autoconf.m4: Add extra argument to AC_LANG_DEFINE call.
        * m4/druntime/os.m4: Use AC_LANG_SOURCE.
        * testsuite/Makefile.am (RUNTEST): Remove quotes.
        * Makefile.in, aclocal.m4, configure, libdruntime/Makefile.in,
        src/Makefile.in, testsuite/Makefile.in: Regenerate.

libquadmath:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        (AUTOMAKE_OPTIONS): Remove 1.8.  Add info-in-builddir.
        (all-local): Define outside conditional code.
        (CLEANFILES): Remove libquadmath.info.
        * configure.ac: Remove AC_PREREQ.
        * Makefile.in, aclocal.m4, config.h.in, configure: Regenerate.

libsanitizer:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        * configure.ac: Remove AC_PREREQ.  Use AC_LANG_SOURCE.
        * Makefile.in, aclocal.m4, asan/Makefile.in, configure,
        interception/Makefile.in, libbacktrace/Makefile.in,
        lsan/Makefile.in, sanitizer_common/Makefile.in, tsan/Makefile.in,
        ubsan/Makefile.in: Regenerate.

libssp:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        (AUTOMAKE_OPTIONS): Remove 1.9.5.
        * configure.ac: Remove AC_PREREQ.  Quote argument to
        AC_RUN_IFELSE.
        * Makefile.in, aclocal.m4, configure: Regenerate.

libstdc++-v3:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        * configure.ac: Remove AC_PREREQ.
        * Makefile.in, aclocal.m4, configure, doc/Makefile.in,
        include/Makefile.in, libsupc++/Makefile.in, po/Makefile.in,
        python/Makefile.in, src/Makefile.in, src/c++11/Makefile.in,
        src/c++17/Makefile.in, src/c++98/Makefile.in,
        src/filesystem/Makefile.in, testsuite/Makefile.in: Regenerate.

libvtv:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.
        * configure.ac: Remove AC_PREREQ.
        * testsuite/Makefile.am (RUNTEST): Remove quotes.
        * Makefile.in, aclocal.m4, configure, testsuite/Makefile.in:
        Regenerate.

lto-plugin:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * configure.ac: Remove AC_PREREQ.  Use AC_LANG_SOURCE.
        * Makefile.in, aclocal.m4, config.h.in, configure: Regenerate.

zlib:
2018-10-31  Joseph Myers  <joseph@codesourcery.com>

        PR bootstrap/82856
        * Makefile.am: Include multilib.am.

        Merge from binutils-gdb:
        2018-06-19  Simon Marchi  <simon.marchi@ericsson.com>

        * configure.ac: Modernize AC_INIT call, remove AC_PREREQ.
        * Makefile.am (AUTOMAKE_OPTIONS): Remove 1.8, cygnus, add foreign.
        * Makefile.in: Re-generate.
        * aclocal.m4: Re-generate.
        * configure: Re-generate.

Added:
    trunk/ar-lib   (with props)
    trunk/multilib.am
    trunk/test-driver   (with props)
Removed:
    trunk/gotools/config/
Modified:
    trunk/ChangeLog
    trunk/config/ChangeLog
    trunk/config/math.m4
    trunk/config/override.m4
    trunk/config/tls.m4
    trunk/configure
    trunk/configure.ac
    trunk/fixincludes/ChangeLog
    trunk/fixincludes/aclocal.m4
    trunk/fixincludes/configure
    trunk/fixincludes/configure.ac
    trunk/gcc/ChangeLog
    trunk/gcc/aclocal.m4
    trunk/gcc/config.in
    trunk/gcc/configure
    trunk/gcc/configure.ac
    trunk/gcc/doc/install.texi
    trunk/gnattools/ChangeLog
    trunk/gnattools/configure
    trunk/gnattools/configure.ac
    trunk/gotools/ChangeLog
    trunk/gotools/Makefile.am
    trunk/gotools/Makefile.in
    trunk/gotools/aclocal.m4
    trunk/gotools/configure
    trunk/gotools/configure.ac
    trunk/intl/ChangeLog
    trunk/intl/aclocal.m4
    trunk/intl/config.h.in
    trunk/intl/configure
    trunk/intl/configure.ac
    trunk/libada/ChangeLog
    trunk/libada/configure
    trunk/libada/configure.ac
    trunk/libatomic/ChangeLog
    trunk/libatomic/Makefile.am
    trunk/libatomic/Makefile.in
    trunk/libatomic/acinclude.m4
    trunk/libatomic/aclocal.m4
    trunk/libatomic/configure
    trunk/libatomic/configure.ac
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    trunk/libstdc++-v3/po/Makefile.in
    trunk/libstdc++-v3/python/Makefile.in
    trunk/libstdc++-v3/src/Makefile.in
    trunk/libstdc++-v3/src/c++11/Makefile.in
    trunk/libstdc++-v3/src/c++17/Makefile.in
    trunk/libstdc++-v3/src/c++98/Makefile.in
    trunk/libstdc++-v3/src/filesystem/Makefile.in
    trunk/libstdc++-v3/testsuite/Makefile.in
    trunk/libtool.m4
    trunk/libvtv/ChangeLog
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    trunk/zlib/configure.ac

Propchange: trunk/ar-lib
            ('svn:executable' added)

Propchange: trunk/test-driver
            ('svn:executable' added)
>From gcc-bugs-return-619826-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 17:17:01 2018
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
Date: Wed, 31 Oct 2018 17:17:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

UroÅ¡ Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #28 from UroÅ¡ Bizjak <ubizjak at gmail dot com> ---
(In reply to Terry Guo from comment #25)
> Debugged the ICE further and found that below line in function
> ix86_get_drap_rtx is causing ICE:
> 
> 12050         insn = emit_insn_before (seq, NEXT_INSN (entry_of_function
> ()));
> 
> It is called when generating call to __asan_stack_free_5 via
> emit_library_call_value_1. The entry_of_function() is returned something
> invalid.

I wonder if it is correct for asan to emit the call without setting RTL
function framework first. The DRAP generation needs function in RTL form, so it
is able to emit DRAP setup.

Let's ask Jakub about asan, if it is possible to move generation of the call
after the function is already expanded to RTL.
>From gcc-bugs-return-619827-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 17:19:47 2018
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #29 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to UroÅ¡ Bizjak from comment #28)
> Let's ask Jakub about asan, if it is possible to move generation of the call
> after the function is already expanded to RTL.

I'm afraid no.
>From gcc-bugs-return-619829-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 17:43:49 2018
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/87835] New: nvptx offloading: libgomp.oacc-c-c++-common/asyncwait-1.c execution test intermittently fails at -O2
Date: Wed, 31 Oct 2018 17:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87835

            Bug ID: 87835
           Summary: nvptx offloading:
                    libgomp.oacc-c-c++-common/asyncwait-1.c execution test
                    intermittently fails at -O2
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: openacc
          Severity: normal
          Priority: P3
         Component: libgomp
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tschwinge at gcc dot gnu.org
                CC: cesar at gcc dot gnu.org, jakub at gcc dot gnu.org,
                    vries at gcc dot gnu.org
  Target Milestone: ---
            Target: nvptx-none

After r264397 "[nvptx] Remove use of CUDA unified memory in libgomp", I'm
seeing (intermittently only, and only on some systems):

    PASS: libgomp.oacc-c/../libgomp.oacc-c-c++-common/asyncwait-1.c
-DACC_DEVICE_TYPE_nvidia=1 -DACC_MEM_SHARED=0  -O0  (test for excess errors)
    PASS: libgomp.oacc-c/../libgomp.oacc-c-c++-common/asyncwait-1.c
-DACC_DEVICE_TYPE_nvidia=1 -DACC_MEM_SHARED=0  -O0  execution test
    PASS: libgomp.oacc-c/../libgomp.oacc-c-c++-common/asyncwait-1.c
-DACC_DEVICE_TYPE_nvidia=1 -DACC_MEM_SHARED=0  -O2  (test for excess errors)
    [-PASS:-]{+FAIL:+}
libgomp.oacc-c/../libgomp.oacc-c-c++-common/asyncwait-1.c
-DACC_DEVICE_TYPE_nvidia=1 -DACC_MEM_SHARED=0  -O2  execution test

And/or:

    PASS: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/asyncwait-1.c
-DACC_DEVICE_TYPE_nvidia=1 -DACC_MEM_SHARED=0  -O0  (test for excess errors)
    PASS: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/asyncwait-1.c
-DACC_DEVICE_TYPE_nvidia=1 -DACC_MEM_SHARED=0  -O0  execution test
    PASS: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/asyncwait-1.c
-DACC_DEVICE_TYPE_nvidia=1 -DACC_MEM_SHARED=0  -O2  (test for excess errors)
    [-PASS:-]{+FAIL:+}
libgomp.oacc-c++/../libgomp.oacc-c-c++-common/asyncwait-1.c
-DACC_DEVICE_TYPE_nvidia=1 -DACC_MEM_SHARED=0  -O2  execution test

I have not yet analyzed what's causing this, but I have some ideas about
pending patches that might cure it.
>From gcc-bugs-return-619828-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 17:43:45 2018
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Subject: [Bug libgomp/87834] New: nvptx offloading: "WARNING: program timed out" for libgomp.fortran/target2.f90 execution test at -O0, -O1
Date: Wed, 31 Oct 2018 17:43:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87834

            Bug ID: 87834
           Summary: nvptx offloading: "WARNING: program timed out" for
                    libgomp.fortran/target2.f90 execution test at -O0, -O1
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: openmp
          Severity: normal
          Priority: P3
         Component: libgomp
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tschwinge at gcc dot gnu.org
                CC: cesar at gcc dot gnu.org, jakub at gcc dot gnu.org,
                    vries at gcc dot gnu.org
  Target Milestone: ---
            Target: nvptx-none

I'm aware of PR81691 "libgomp.fortran/target2.f90 fails for nvptx at -O0 and
-O1", but after r264397 "[nvptx] Remove use of CUDA unified memory in libgomp"
they now also run into "WARNING: program timed out", which is annoying.

    PASS: libgomp.fortran/target2.f90   -O0  (test for excess errors)
    {+WARNING: program timed out.+}
    FAIL: libgomp.fortran/target2.f90   -O0  execution test
    PASS: libgomp.fortran/target2.f90   -O1  (test for excess errors)
    {+WARNING: program timed out.+}
    FAIL: libgomp.fortran/target2.f90   -O1  execution test
    PASS: libgomp.fortran/target2.f90   -O2  (test for excess errors)
    PASS: libgomp.fortran/target2.f90   -O2  execution test

I have not yet analyzed what's causing this, but I have some ideas about
pending patches that might cure it.
>From gcc-bugs-return-619830-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 17:46:40 2018
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Subject: [Bug bootstrap/82856] --enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82856

Joseph S. Myers <jsm28 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|8.3                         |9.0

--- Comment #11 from Joseph S. Myers <jsm28 at gcc dot gnu.org> ---
Fixed for GCC 9 by updating the required automake version.
>From gcc-bugs-return-619831-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 17:46:42 2018
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Subject: [Bug fortran/36313] [F03] {MIN,MAX}{LOC,VAL} should accept character arguments
Date: Wed, 31 Oct 2018 17:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36313
Bug 36313 depends on bug 82856, which changed state.

Bug 82856 Summary: --enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82856

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
>From gcc-bugs-return-619832-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 17:52:41 2018
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Subject: [Bug tree-optimization/87415] [9 Regression] wrong code at -O1 and above on x86_64-linux-gnu
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87415

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |jakub at gcc dot gnu.org
         Resolution|---                         |FIXED

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
.
>From gcc-bugs-return-619833-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 18:13:09 2018
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
Date: Wed, 31 Oct 2018 18:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #30 from UroÅ¡ Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #29)
> > Let's ask Jakub about asan, if it is possible to move generation of the call
> > after the function is already expanded to RTL.
> 
> I'm afraid no.

Hm...

... maybe we could go with following patch:

+  if (SUPPORTS_STACK_ALIGNMENT)
+    {
+      if (preferred_stack_boundary > crtl->stack_alignment_estimated)
+       crtl->stack_alignment_estimated = preferred_stack_boundary;
+      if (preferred_stack_boundary > crtl->stack_alignment_needed)
+       crtl->stack_alignment_needed = preferred_stack_boundary;
+    }

This means that for functions, emitted through emit_library_call, stack won't
be realigned. This would cure the assert (and would follow a bit more
expand_stack_alignment from cfgrtl.c).
>From gcc-bugs-return-619834-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 18:19:59 2018
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From: "gary_mills at fastmail dot fm" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/87836] New: ICE in cc1 for gcc-6.5.0 with SPARC hardware
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87836

            Bug ID: 87836
           Summary: ICE in cc1 for gcc-6.5.0 with SPARC hardware
           Product: gcc
           Version: 6.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gary_mills at fastmail dot fm
  Target Milestone: ---

Here's information on the compiler:
<mills@t2000:941>$
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/build/sparcv7/./gcc/xgcc
--version
xgcc (OpenIndiana 6.5.0-OI-4) 6.5.0
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.

<mills@t2000:944>$ -6/build/sparcv7/./gcc/xgcc -v                            <
Using built-in specs.
COLLECT_GCC=/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/build/sparcv7/./gcc/xgcc
Target: sparc-sun-solaris2.11
Configured with:
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/configure
CC=/usr/gcc/4.9/bin/gcc CXX=/usr/gcc/4.9/bin/g++ F77=/usr/gcc/4.9/bin/gfortran
FC=/usr/gcc/4.9/bin/gfortran CFLAGS='-g -O2' CXXFLAGS=' ' FFLAGS=' ' FCFLAGS=
LDFLAGS=-m32 PKG_CONFIG_PATH=/usr/lib/pkgconfig --prefix=/usr/gcc/6
--mandir=/usr/gcc/6/share/man --bindir=/usr/gcc/6/bin --libdir=/usr/gcc/6/lib
--sbindir=/usr/gcc/6/sbin --sbindir=/usr/gcc/6/bin --libdir=/usr/gcc/6/lib
--libexecdir=/usr/gcc/6/lib --host sparc-sun-solaris2.11 --build
sparc-sun-solaris2.11 --target sparc-sun-solaris2.11
--with-pkgversion='OpenIndiana 6.5.0-OI-4'
--with-bugurl=https://bugs.openindiana.org --enable-plugins --enable-objc-gc
--enable-initfini-array --enable-languages=c,c++,fortran,lto,objc
--without-gnu-ld --with-ld=/usr/bin/ld
--with-build-time-tools=/usr/gnu/sparc-sun-solaris2.11/bin --disable-libitm
--without-gnu-as --with-as=/usr/bin/as LDFLAGS=-R/usr/gcc/6/lib
Thread model: posix
gcc version 6.5.0 (OpenIndiana 6.5.0-OI-4) 

Here's the error I get:
<mills@t2000:946>$
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/build/sparcv7/./gcc/xgcc
-B/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/build/sparcv7/./gcc/
-S conftest.c
conftest.c: In function 'main':
conftest.c:2:1: internal compiler error: Segmentation Fault
 main ()
 ^~~~
0x631deb crash_signal
       
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/toplev.c:333
0x360b3c et_splay
       
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/et-forest.c:311
0x361833 et_set_father
       
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/et-forest.c:525
0x301e6b calculate_dominance_info(cdi_direction)
       
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/dominance.c:658
0x6701cb cleanup_tree_cfg_noloop
       
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/tree-cfgcleanup.c:759
0x6701cb cleanup_tree_cfg()
       
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/tree-cfgcleanup.c:818
0x66ab87 execute_build_cfg
       
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/tree-cfg.c:360
0x66ab87 execute
       
/export/home/mills/Downloads/code/oi-userland/components/developer/gcc-6/gcc-6.5.0/gcc/tree-cfg.c:389
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://bugs.openindiana.org> for instructions.

Here's the source file:
<mills@t2000:948>$ cat conftest.c
int
main ()
{

  ;
  return 0;
}

This happens on a Sun T2000 running v9os (oi_151a9).  The kernel is illumos.
I get the same error and backtrace with gcc-6.4.0 and gcc-7.3.0 .  It worked
with gcc-4.9.4 .  The error appears with the configuration for phase 2 and
also when xgcc is run separately as in this test.  It does build correctly on
x86 hardware.

Note that all of these gcc versions have some patches applied.  These patches
adapt gcc for building the illumos kernel.

I'm willing to test potential fixes on my hardware and OS or to gather
additional debugging information.
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Subject: [Bug fortran/20520] allocatable arrays used uninitialized without a warning
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=20520

--- Comment #20 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Wed Oct 31 18:35:59 2018
New Revision: 265698

URL: https://gcc.gnu.org/viewcvs?rev=265698&root=gcc&view=rev
Log:
2018-10-31  Thomas Koenig  <tkoenig@gcc.gnu.org>

        PR fortran/20520
        * gfortran.dg/allocatable_uninitialized_1.f90: New test.


Added:
    trunk/gcc/testsuite/gfortran.dg/allocatable_uninitialized_1.f90
Modified:
    trunk/gcc/testsuite/ChangeLog
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=20520

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
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--- Comment #21 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Marking as fixed.
>From gcc-bugs-return-619837-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 19:44:39 2018
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From: "jb at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug web/87050] Bump wwwdocs to html5
Date: Wed, 31 Oct 2018 19:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87050

Janne Blomqvist <jb at gcc dot gnu.org> changed:

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--- Comment #13 from Janne Blomqvist <jb at gcc dot gnu.org> ---
I just committed an obvious patch to rename the XHTML var in style.mhtml to
NOSTYLE, and with that, all occurences of XHTML in wwwdocs have been exorcised
(except gitweb, but that of course comes from upstream).

Once again, a big thanks to Gerald!
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Subject: [Bug bootstrap/82856] --enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl
Date: Wed, 31 Oct 2018 20:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82856

--- Comment #12 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Wed Oct 31 20:46:17 2018
New Revision: 265701

URL: https://gcc.gnu.org/viewcvs?rev=265701&root=gcc&view=rev
Log:
        PR bootstrap/82856

    libgo: update to autoconf 2.69 and automake 1.15.1

    Initial patch from Joseph Myers.

    Reviewed-on: https://go-review.googlesource.com/c/146417

Removed:
    trunk/libgo/config/go.m4
Modified:
    trunk/gcc/go/gofrontend/MERGE
    trunk/libgo/Makefile.am
    trunk/libgo/Makefile.in
    trunk/libgo/aclocal.m4
    trunk/libgo/config/libtool.m4
    trunk/libgo/configure
    trunk/libgo/configure.ac
    trunk/libgo/testsuite/Makefile.in
>From gcc-bugs-return-619839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 21:49:44 2018
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From: "ibuclaw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug d/87825] profiledbootstrap is broken when D is enabled
Date: Wed, 31 Oct 2018 21:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87825

--- Comment #1 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Wed Oct 31 21:48:52 2018
New Revision: 265702

URL: https://gcc.gnu.org/viewcvs?rev=265702&root=gcc&view=rev
Log:
Fix profiledbootstrap when D is enabled

gcc/d/ChangeLog:

2018-10-31  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR d/87825
        * Make-lang.in (d/idgen) Link with BUILD_LINKERFLAGS.
        (d/impcvgen): Likewise.

Modified:
    trunk/gcc/d/ChangeLog
    trunk/gcc/d/Make-lang.in
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Subject: [Bug d/87825] profiledbootstrap is broken when D is enabled
Date: Wed, 31 Oct 2018 21:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87825

Iain Buclaw <ibuclaw at gdcproject dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
This is done.
>From gcc-bugs-return-619841-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Wed Oct 31 22:12:29 2018
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From: "eggert at cs dot ucla.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/87837] New: -O2 -fsanitize=signed-integer-overflow misses overflows on x86-64
Date: Wed, 31 Oct 2018 22:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87837

            Bug ID: 87837
           Summary: -O2 -fsanitize=signed-integer-overflow misses
                    overflows on x86-64
           Product: gcc
           Version: 8.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: eggert at cs dot ucla.edu
                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: ---

In GCC 8, -O2 -fsanitize=signed-integer-overflow (and -fsanitize=undefined) is
missing signed integer overflows. GCC 7 caught them so this is a regression. I
observed the problem with GCC 8.2.1 20181011 (Red Hat 8.2.1-4) on x86-64.
Consider this function in the file testovf.c:

_Bool
testovf (long n)
{
  return n + 9223372036854775807 < n;
}

Compile it with:

gcc -O2 -S -fsanitize=signed-integer-overflow testovf.c

With GCC 7.3.0, an overflow will be detected at runtime if one passes a
positive value to 'testovf', but with GCC 8.2.1 no overflow is detected. This
is because GCC 7.3.0 generates overflow-checking code (e.g., "addq %rdx, %rdp;
jo .L6") whereas GCC 8.2.1 merely generates this:

testovf:
        xorl    %eax, %eax
        ret

Apparently GCC 8 is optimizing away the overflow test on the ground that if
overflow occurs, behavior is undefined so the generated code can do anything.
But when -fsanitize=signed-integer-overflow is used, that's not correct: the
user wants overflows to be diagnosed, not to be optimized away. That is, when
-fsanitize=signed-integer-overflow is used, behavior is not undefined when
signed integer overflow occurs (it is well-defined to trap), so these
optimizations should be inhibited.
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Subject: [Bug c/87806] Option -Wall should warn about unused structs, typdefs, enums, etc
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87806

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |msebor at gcc dot gnu.org

--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> ---
I agree that focusing the warning on definitions in .c files and avoiding those
in headers would be necessary to make the fallout manageable.  But I'm not sure
-Wall or even -Wextra is a good fit even for this relaxed version of the
warning.  GCC (and many other GNU projects, including Glibc) has a policy of
compiling cleanly with -Wall and -Wextra so enabling such a warning by either
would likely mean a lot of work cleaning up GCC itself (and the other
projects).  Building some of these projects with the warnings explicitly
enabled would give us an idea of the scope of the cleanup.  I could give that a
try but I can't find any options that control warnings about unused non-local
types and enums.  What are they?
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #31 from Terry Guo <xuepeng.guo at intel dot com> ---
(In reply to UroÅ¡ Bizjak from comment #30)
> (In reply to Jakub Jelinek from comment #29)
> > > Let's ask Jakub about asan, if it is possible to move generation of the call
> > > after the function is already expanded to RTL.
> > 
> > I'm afraid no.
> 
> Hm...
> 
> ... maybe we could go with following patch:
> 
> +  if (SUPPORTS_STACK_ALIGNMENT)
> +    {
> +      if (preferred_stack_boundary > crtl->stack_alignment_estimated)
> +	crtl->stack_alignment_estimated = preferred_stack_boundary;
> +      if (preferred_stack_boundary > crtl->stack_alignment_needed)
> +	crtl->stack_alignment_needed = preferred_stack_boundary;
> +    }
> 
> This means that for functions, emitted through emit_library_call, stack
> won't be realigned. This would cure the assert (and would follow a bit more
> expand_stack_alignment from cfgrtl.c).

I have same thought. I will test this one.
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>From gcc-bugs-return-619845-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 01:20:24 2018
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From: "xuepeng.guo at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
Date: Thu, 01 Nov 2018 01:20:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #32 from Terry Guo <xuepeng.guo at intel dot com> ---
(In reply to David Grayson from comment #27)
> Thanks to everyone who is working on this.  I can confirm that the patch in
> comment #20 by UroÅ¡ Bizjak applies cleanly to GCC 7.3.0, and I successfully
> used the resulting toolchain targeting i686-w64-mingw32 to build Qt and
> several Qt GUI examples, all of which run correctly.
> 
> Just in case it helps you find more bugs: I noticed there are several other
> places in the code (of gcc-8-20181019) where ctrl->preferred_stack_boundary
> gets updated without any obvious update of ctrl->stack_alignment_needed:
> 
> gcc/explow.c:1247 in get_dynamic_stack_size
> gcc/explow.c:1595 in get_dynamic_stack_base
> gcc/calls.c:3811 in expand_call
> gcc/config/i386/i386.c:12593 in ix86_update_stack_boundary

Hello David,
Do you have instructions about how to build toolchain targeting
i686-w64-mingw32? I searched around and just found:
https://sourceforge.net/p/mingw-w64/code/HEAD/tree/trunk/mingw-w64-doc/howto-build/mingw-w64-howto-build.txt
>From gcc-bugs-return-619846-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 01:44:37 2018
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From: "menospaamthereaper at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87838] New: Segmentation fault with function pointer to contained function
Date: Thu, 01 Nov 2018 01:44:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87838

            Bug ID: 87838
           Summary: Segmentation fault with function pointer to contained
                    function
           Product: gcc
           Version: 8.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: menospaamthereaper at hotmail dot com
  Target Milestone: ---

Created attachment 44938
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44938&action=edit
Output from -save-temps

Function pointer to a function contained within the same program gives a
segmentation fault. Confirmed in both 7.3.0 and 8.2.0-1 (Ubuntu 18.04 installed
from apt). Compiled with gfortran test.f03 and gfortran-8 test.f03. Minimal
failing example:

program test_func_ptrs

     implicit none

      abstract interface
          subroutine func()
          end subroutine
      end interface

    procedure (func), pointer :: f_ptr => null ()

    f_ptr => f1

    call f_ptr()

     contains

     subroutine f1()
         implicit none

        return
     end subroutine

 end program test_func_ptrs
>From gcc-bugs-return-619847-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 02:28:28 2018
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70180

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dmalcolm at gcc dot gnu.org,
                   |                            |dodji at gcc dot gnu.org

--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing diagnostics maintainers
>From gcc-bugs-return-619848-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 02:31:49 2018
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Subject: [Bug debug/48886] VTA issues with > word size integers
Date: Thu, 01 Nov 2018 02:31:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48886

--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Alexandre Oliva from comment #2)
> FWIW, I've just tried the testcase in the description with trunk, with -g
> alone and with -O2, and got a full pass on x86_64- and i686-linux-gnu.

So is this fixed then?
>From gcc-bugs-return-619849-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 03:21:34 2018
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #33 from David Grayson <davidegrayson at gmail dot com> ---
Hello, Terry.  I'd be happy to help.  I hope you have access to a Linux
computer.  I've actually spent a lot of time working on build scripts for
cross-compilers running on Linux and here's what I have come up with for you:

https://gist.github.com/DavidEGrayson/d5ca447cca1ea23d5adca2f353dbb67a
>From gcc-bugs-return-619850-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 06:02:47 2018
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #34 from Terry Guo <xuepeng.guo at intel dot com> ---
(In reply to David Grayson from comment #33)
> Hello, Terry.  I'd be happy to help.  I hope you have access to a Linux
> computer.  I've actually spent a lot of time working on build scripts for
> cross-compilers running on Linux and here's what I have come up with for you:
> 
> https://gist.github.com/DavidEGrayson/d5ca447cca1ea23d5adca2f353dbb67a

Thanks David. I will give it a try.
>From gcc-bugs-return-619851-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 06:19:15 2018
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Subject: [Bug sanitizer/87837] -O2 -fsanitize=signed-integer-overflow misses overflows on x86-64
Date: Thu, 01 Nov 2018 06:59:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87837

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
The corresponding match.pd transformation already checks
TYPE_OVERFLOW_UNDEFINED, which apparently is not sufficient. That's
inconvenient, -ftrapv does change the value of that macro.
>From gcc-bugs-return-619853-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 07:33:25 2018
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Subject: [Bug tree-optimization/83352] Missed optimization in math expression: sqrt(sqrt(a)) == pow(a, 1/4)
Date: Thu, 01 Nov 2018 07:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83352

--- Comment #2 from Alexander Zaitsev <zamazan4ik at tut dot by> ---
What about longer sqrt functions call?

gcc(trunk) -O3 -ffast-math:

double test(double a)
{
    return sqrt(sqrt(sqrt(sqrt(sqrt(a)))));
}

test(double):
        andpd   xmm0, XMMWORD PTR .LC0[rip]
        sqrtsd  xmm0, xmm0
        sqrtsd  xmm0, xmm0
        sqrtsd  xmm0, xmm0
        sqrtsd  xmm0, xmm0
        sqrtsd  xmm0, xmm0
        ret

Don't see any optimizations on godbolt
>From gcc-bugs-return-619854-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 07:36:47 2018
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Subject: [Bug tree-optimization/83353] Missed optimization in math expression: sin(asin(a)) == a
Date: Thu, 01 Nov 2018 07:36:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83353

--- Comment #3 from Alexander Zaitsev <zamazan4ik at tut dot by> ---
FMPOV compiler should optimize as much as possible. If it's too time consuming,
I prefer some additional compiler option like
-f-do-some-math-time-consuming-optimization.

And yes - developers canot write all math optimizations manually. We need some
math engine inside (smth like souper optimizer)
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Subject: [Bug tree-optimization/83354] Missed optimization in math expression: pow(cbrt(x), y) == pow(x, y / 3)
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Alexander Zaitsev <zamazan4ik at tut dot by> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|---                         |INVALID
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Subject: [Bug tree-optimization/83348] Missed optimization in math expression: can be used std::pow function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83348

--- Comment #2 from Alexander Zaitsev <zamazan4ik at tut dot by> ---
Thank you for the great comment! Should I close this issue?
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Subject: [Bug tree-optimization/83350] Missed optimization in math expression: missing cube of the sum formula
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--- Comment #2 from Alexander Zaitsev <zamazan4ik at tut dot by> ---
Sure. Do you know about any activity in gcc in implementing or integrating
built-in math engine for optimizing such expressions?
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Subject: [Bug tree-optimization/83354] Missed optimization in math expression: pow(cbrt(x), y) == pow(x, y / 3)
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--- Comment #2 from Alexander Zaitsev <zamazan4ik at tut dot by> ---
Yes, you are right. My bad. Closing this issue.
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Subject: [Bug target/87839] New: ICE in final_scan_insn_1, at final.c:3070
Date: Thu, 01 Nov 2018 08:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87839

            Bug ID: 87839
           Summary: ICE in final_scan_insn_1, at final.c:3070
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: aarch64-linux-gnu

Following causes ICE:

$ cat ice.i
long b[1];
void abort();
void a();
int d();
void c() {
  __sync_val_compare_and_swap(b, 4294967298, 78187493520);
  __sync_bool_compare_and_swap(b + 1, 8589934595, 21474836489);
  __sync_fetch_and_xor(b, 60129542145);
  __sync_fetch_and_nand(b, 42949672967);
  __sync_xor_and_fetch(b + 22, 60129542145);
  __sync_nand_and_fetch(b + 23, 42949672967);
  if (d(c))
    abort();
  a();
  __sync_val_compare_and_swap(b, 4294967298, 0);
  __sync_bool_compare_and_swap(b + 1, 8589934595, 78187493520);
  if (__sync_or_and_fetch(b, 21474836489) != 21474836489)
    abort(b + 22, 60129542145);
  __sync_nand_and_fetch(b + 23, 42949672967);
  d(c);
}

$ aarch64-linux-gnu-gcc ice.i --param max-cse-path-length=3 -Ofast -Werror
ice.i: In function â€˜câ€™:
ice.i:9:3: note: â€˜__sync_fetch_and_nandâ€™ changed semantics in GCC 4.4
    9 |   __sync_fetch_and_nand(b, 42949672967);
      |   ^~~~~~~~~~~~~~~~~~~~~
ice.i:11:3: note: â€˜__sync_nand_and_fetchâ€™ changed semantics in GCC 4.4
   11 |   __sync_nand_and_fetch(b + 23, 42949672967);
      |   ^~~~~~~~~~~~~~~~~~~~~
ice.i:21:1: error: could not split insn
   21 | }
      | ^
(insn 16 13 135 (parallel [
            (set (reg:CC 66 cc)
                (unspec_volatile:CC [
                        (const_int 0 [0])
                    ] UNSPECV_ATOMIC_CMPSW))
            (set (reg:DI 0 x0 [101])
                (mem/v:DI (reg/f:DI 21 x21 [99]) [-1  S8 A64]))
            (set (mem/v:DI (reg/f:DI 21 x21 [99]) [-1  S8 A64])
                (unspec_volatile:DI [
                        (const_int 8589934595 [0x200000003])
                        (reg:DI 24 x24 [103])
                        (const_int 0 [0])
                        (const_int 32773 [0x8005]) repeated x2
                    ] UNSPECV_ATOMIC_CMPSW))
            (clobber (reg:SI 1 x1 [144]))
        ]) "ice.i":7:3 3532 {aarch64_compare_and_swapdi}
     (expr_list:REG_UNUSED (reg:CC 66 cc)
        (expr_list:REG_UNUSED (reg:SI 1 x1 [144])
            (expr_list:REG_UNUSED (reg:DI 0 x0 [101])
                (nil)))))
during RTL pass: final
ice.i:21:1: internal compiler error: in final_scan_insn_1, at final.c:3070
0x5b933b _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/rtl-error.c:108
0x5ad6cf final_scan_insn_1
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/final.c:3070
0x7e000b final_scan_insn(rtx_insn*, _IO_FILE*, int, int, int*)
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/final.c:3149
0x7e02cc final_1
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/final.c:2019
0x7e0ce4 rest_of_handle_final
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/final.c:4649
0x7e0ce4 execute
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/final.c:4723
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Subject: [Bug target/87839] [9 Regression] ICE in final_scan_insn_1, at final.c:3070
Date: Thu, 01 Nov 2018 08:57:00 -0000
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Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ktkachov at gcc dot gnu.org,
                   |                            |ramana at gcc dot gnu.org
   Target Milestone|---                         |9.0
            Summary|ICE in final_scan_insn_1,   |[9 Regression] ICE in
                   |at final.c:3070             |final_scan_insn_1, at
                   |                            |final.c:3070
              Build|                            |powerpc64*-*-*
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Subject: [Bug sanitizer/87837] [8/9 Regression] -O2 -fsanitize=signed-integer-overflow misses overflows on x86-64
Date: Thu, 01 Nov 2018 08:58:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87837

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-11-01
                 CC|                            |rguenth at gcc dot gnu.org
      Known to work|                            |7.3.0
            Summary|-O2                         |[8/9 Regression] -O2
                   |-fsanitize=signed-integer-o |-fsanitize=signed-integer-o
                   |verflow misses overflows on |verflow misses overflows on
                   |x86-64                      |x86-64
     Ever confirmed|0                           |1
      Known to fail|                            |8.2.0, 9.0

--- Comment #2 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Btw. started with r247495.
>From gcc-bugs-return-619862-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 09:02:06 2018
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #35 from UroÅ¡ Bizjak <ubizjak at gmail dot com> ---
(In reply to Terry Guo from comment #31)
> (In reply to UroÅ¡ Bizjak from comment #30)
> > (In reply to Jakub Jelinek from comment #29)
> > > > Let's ask Jakub about asan, if it is possible to move generation of the call
> > > > after the function is already expanded to RTL.
> > > 
> > > I'm afraid no.
> > 
> > Hm...
> > 
> > ... maybe we could go with following patch:
> > 
> > +  if (SUPPORTS_STACK_ALIGNMENT)
> > +    {
> > +      if (preferred_stack_boundary > crtl->stack_alignment_estimated)
> > +	crtl->stack_alignment_estimated = preferred_stack_boundary;
> > +      if (preferred_stack_boundary > crtl->stack_alignment_needed)
> > +	crtl->stack_alignment_needed = preferred_stack_boundary;
> > +    }
> > 
> > This means that for functions, emitted through emit_library_call, stack
> > won't be realigned. This would cure the assert (and would follow a bit more
> > expand_stack_alignment from cfgrtl.c).
> 
> I have same thought. I will test this one.

Actually, we can use crtl->stack_realign_processed to delay DRAP generation.
The condition in the patch should be changed to:

      crtl->stack_realign_needed
        = INCOMING_STACK_BOUNDARY < crtl->stack_alignment_estimated;
      crtl->stack_realign_tried = crtl->stack_realign_needed;

--->  if (crtl->stack_realign_processed && crtl->drap_reg == NULL_RTX)
        {
          rtx drap_rtx = targetm.calls.get_drap_rtx ();

Can you please test this change? The testcase from Comment #23 does not fail
for me.
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Subject: [Bug sanitizer/87837] [8/9 Regression] -O2 -fsanitize=signed-integer-overflow misses overflows on x86-64
Date: Thu, 01 Nov 2018 09:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87837

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |jakub at gcc dot gnu.org
   Target Milestone|---                         |8.3

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
We usually have for this
match.pd: (if (TYPE_OVERFLOW_UNDEFINED (TREE_TYPE (@3))
match.pd-      && !TYPE_OVERFLOW_SANITIZED (TREE_TYPE (@2)))
I'll have a look.
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #36 from Terry Guo <xuepeng.guo at intel dot com> ---
(In reply to UroÅ¡ Bizjak from comment #35)
> 
> Actually, we can use crtl->stack_realign_processed to delay DRAP generation.
> The condition in the patch should be changed to:
> 
>       crtl->stack_realign_needed
> 	= INCOMING_STACK_BOUNDARY < crtl->stack_alignment_estimated;
>       crtl->stack_realign_tried = crtl->stack_realign_needed;
> 
> --->  if (crtl->stack_realign_processed && crtl->drap_reg == NULL_RTX)
> 	{
> 	  rtx drap_rtx = targetm.calls.get_drap_rtx ();
> 
> Can you please test this change? The testcase from Comment #23 does not fail
> for me.

OK. Do it right now.
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Subject: [Bug c++/64266] Can GCC produce local mergeable symbols for *.__FUNCTION__ and *.__PRETTY_FUNCTION__ functions?
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64266

--- Comment #13 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Nov  1 09:19:31 2018
New Revision: 265711

URL: https://gcc.gnu.org/viewcvs?rev=265711&root=gcc&view=rev
Log:
Make __PRETTY_FUNCTION__-like functions mergeable string csts (PR c++/64266).

2018-11-01  Martin Liska  <mliska@suse.cz>
            Jason Merrill  <jason@redhat.com>

        PR c++/64266
        PR bootstrap/70422
        PR ipa/81277
        * cp-tree.h (DECL_FNAME_P): New macro.
        * decl.c (cp_make_fname_decl): Set DECL_DECLARED_CONSTEXPR_P,
        DECL_VALUE_EXPR, DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P.
        (cp_finish_decl):
        * lambda.c (is_capture_proxy): Use DECL_FNAME_P.
        * pt.c (tsubst_expr): Handle DECL_PRETTY_FUNCTION_P.
2018-11-01  Martin Liska  <mliska@suse.cz>
            Jason Merrill  <jason@redhat.com>

        PR c++/64266
        PR bootstrap/70422
        PR ipa/81277
        * g++.dg/cpp0x/constexpr-__func__2.C: Make it a compilation
        test.
        * g++.old-deja/g++.ext/pretty4.C: Remove as the run-time
        assumptions are not longer valid.

Removed:
    trunk/gcc/testsuite/g++.old-deja/g++.ext/pretty4.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/cp-tree.h
    trunk/gcc/cp/decl.c
    trunk/gcc/cp/lambda.c
    trunk/gcc/cp/pt.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-__func__2.C
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Subject: [Bug ipa/81277] assert() in multiversioned functions causes compilation error
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81277

--- Comment #4 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Nov  1 09:19:31 2018
New Revision: 265711

URL: https://gcc.gnu.org/viewcvs?rev=265711&root=gcc&view=rev
Log:
Make __PRETTY_FUNCTION__-like functions mergeable string csts (PR c++/64266).

2018-11-01  Martin Liska  <mliska@suse.cz>
            Jason Merrill  <jason@redhat.com>

        PR c++/64266
        PR bootstrap/70422
        PR ipa/81277
        * cp-tree.h (DECL_FNAME_P): New macro.
        * decl.c (cp_make_fname_decl): Set DECL_DECLARED_CONSTEXPR_P,
        DECL_VALUE_EXPR, DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P.
        (cp_finish_decl):
        * lambda.c (is_capture_proxy): Use DECL_FNAME_P.
        * pt.c (tsubst_expr): Handle DECL_PRETTY_FUNCTION_P.
2018-11-01  Martin Liska  <mliska@suse.cz>
            Jason Merrill  <jason@redhat.com>

        PR c++/64266
        PR bootstrap/70422
        PR ipa/81277
        * g++.dg/cpp0x/constexpr-__func__2.C: Make it a compilation
        test.
        * g++.old-deja/g++.ext/pretty4.C: Remove as the run-time
        assumptions are not longer valid.

Removed:
    trunk/gcc/testsuite/g++.old-deja/g++.ext/pretty4.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/cp-tree.h
    trunk/gcc/cp/decl.c
    trunk/gcc/cp/lambda.c
    trunk/gcc/cp/pt.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-__func__2.C
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Subject: [Bug bootstrap/70422] [6 regression] Bootstrap comparison failure
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70422

--- Comment #11 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Author: marxin
Date: Thu Nov  1 09:19:31 2018
New Revision: 265711

URL: https://gcc.gnu.org/viewcvs?rev=265711&root=gcc&view=rev
Log:
Make __PRETTY_FUNCTION__-like functions mergeable string csts (PR c++/64266).

2018-11-01  Martin Liska  <mliska@suse.cz>
            Jason Merrill  <jason@redhat.com>

        PR c++/64266
        PR bootstrap/70422
        PR ipa/81277
        * cp-tree.h (DECL_FNAME_P): New macro.
        * decl.c (cp_make_fname_decl): Set DECL_DECLARED_CONSTEXPR_P,
        DECL_VALUE_EXPR, DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P.
        (cp_finish_decl):
        * lambda.c (is_capture_proxy): Use DECL_FNAME_P.
        * pt.c (tsubst_expr): Handle DECL_PRETTY_FUNCTION_P.
2018-11-01  Martin Liska  <mliska@suse.cz>
            Jason Merrill  <jason@redhat.com>

        PR c++/64266
        PR bootstrap/70422
        PR ipa/81277
        * g++.dg/cpp0x/constexpr-__func__2.C: Make it a compilation
        test.
        * g++.old-deja/g++.ext/pretty4.C: Remove as the run-time
        assumptions are not longer valid.

Removed:
    trunk/gcc/testsuite/g++.old-deja/g++.ext/pretty4.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/cp-tree.h
    trunk/gcc/cp/decl.c
    trunk/gcc/cp/lambda.c
    trunk/gcc/cp/pt.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-__func__2.C
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Subject: [Bug ipa/81277] assert() in multiversioned functions causes compilation error
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81277

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Fixed.
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Subject: [Bug c/87806] Option -Wall should warn about unused structs, typdefs, enums, etc
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--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't think there are any, only for local typedefs. That's already enabled by
-Wall so I assumed this was a request to add a new warning *and* enable it in
-Wall.
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Subject: [Bug c++/64266] Can GCC produce local mergeable symbols for *.__FUNCTION__ and *.__PRETTY_FUNCTION__ functions?
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64266

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
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--- Comment #14 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Fixed on trunk.
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Subject: [Bug sanitizer/87837] [8/9 Regression] -O2 -fsanitize=signed-integer-overflow misses overflows on x86-64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87837

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44939
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44939&action=edit
gcc9-pr87837.patch

Untested fix for this issue.  Note, we should go through all of match.pd and
for each TYPE_OVERFLOW_UNDEFINED not accompanied with !TYPE_OVERFLOW_SANITIZED
try to think if that might cause some missed cases, construct testcases and fix
if needed.  Don't have spare cycles for that right now though.
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Subject: [Bug sanitizer/87837] [8/9 Regression] -O2 -fsanitize=signed-integer-overflow misses overflows on x86-64
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--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Even the above commented TYPE_OVERFLOW_SANITIZED looks weird, I'd expect the
type of the same expression on which we check TYPE_OVERFLOW_UNDEFINED.
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Subject: [Bug sanitizer/87840] New: LSAN misses self-refential shared_ptrs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87840

            Bug ID: 87840
           Summary: LSAN misses self-refential shared_ptrs
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jengelh at inai dot de
                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: ---

$ cat x.cpp
#include <memory>
struct S {
        std::shared_ptr<S> other;
};
int main()
{
        auto e = std::make_shared<S>();
        e->other = e;
}

$ g++-9 x.cpp -ggdb3 -llsan -fsanitize=leak
$ ./a.out
$

LSAN fails to report the cycle while valgrind does.

Using built-in specs.
COLLECT_GCC=g++-9
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/9/lto-wrapper
OFFLOAD_TARGET_NAMES=hsa:nvptx-none
Target: x86_64-suse-linux
Configured with: ../configure --prefix=/usr --infodir=/usr/share/info
--mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64
--enable-languages=c,c++,objc,fortran,obj-c++,ada,go
--enable-offload-targets=hsa,nvptx-none=/usr/nvptx-none, --without-cuda-driver
--enable-checking=release --disable-werror
--with-gxx-include-dir=/usr/include/c++/9 --enable-ssp --disable-libssp
--disable-libvtv --disable-cet --disable-libcc1 --enable-plugin
--with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux'
--with-slibdir=/lib64 --with-system-zlib --enable-libstdcxx-allocator=new
--disable-libstdcxx-pch --enable-version-specific-runtime-libs
--with-gcc-major-version-only --enable-linker-build-id --enable-linux-futex
--enable-gnu-indirect-function --program-suffix=-9 --without-system-libunwind
--enable-multilib --with-arch-32=x86-64 --with-tune=generic
--build=x86_64-suse-linux --host=x86_64-suse-linux
Thread model: posix
gcc version 9.0.0 20181026 (experimental) [trunk revision 265522] (SUSE Linux) 
Applies to 
gcc version 8.2.1 20180831 [gcc-8-branch revision 264010] (SUSE Linux) 
gcc version 7.3.1 20180817 [gcc-7-branch revision 263612] (SUSE Linux) 
as well.
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Subject: [Bug c++/87842] New: Member of class template hides template parameter of another member
Date: Thu, 01 Nov 2018 10:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87842

            Bug ID: 87842
           Summary: Member of class template hides template parameter of
                    another member
           Product: gcc
           Version: 8.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: o_kniemeyer at maxon dot net
  Target Milestone: ---

The following code example from C++17 standard 17.6.1.7 does not compile:

template<class T> struct A {
  struct B { /* ... */ };
  typedef void C;
  void f();
  template<class U> void g(U);
};

template<class B> void A<B>::f() {
  B b; // A's B, not the template parameter
}

template<class B> template<class C> void A<B>::g(C) {
  B b; // A's B, not the template parameter
  C c; // the template parameter C, not A's C
}

This is because GCC uses A's C instead of the template parameter C of A::g.
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Subject: [Bug c++/87841] New: Member of class template hides template parameter of another member
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87841

            Bug ID: 87841
           Summary: Member of class template hides template parameter of
                    another member
           Product: gcc
           Version: 8.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
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  Target Milestone: ---

The following code example from C++17 standard 17.6.1.7 does not compile:

template<class T> struct A {
  struct B { /* ... */ };
  typedef void C;
  void f();
  template<class U> void g(U);
};

template<class B> void A<B>::f() {
  B b; // A's B, not the template parameter
}

template<class B> template<class C> void A<B>::g(C) {
  B b; // A's B, not the template parameter
  C c; // the template parameter C, not A's C
}

This is because GCC uses A's C instead of the template parameter C of A::g.
>From gcc-bugs-return-619876-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 10:02:33 2018
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Subject: [Bug sanitizer/87840] LSAN misses self-refential shared_ptrs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87840

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2018-11-01
     Ever confirmed|0                           |1

--- Comment #1 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
for GCC 7, 8 and current trunk I see:

$ g++ pr87840.cpp -fsanitize=leak -g && ./a.out 

=================================================================
==31759==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 32 byte(s) in 1 object(s) allocated from:
    #0 0x7ffff74fa7db in operator new(unsigned long)
/home/marxin/Programming/gcc/libsanitizer/lsan/lsan_interceptors.cc:222
    #1 0x401c23 in __gnu_cxx::new_allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >::allocate(unsigned long, void
const*) /home/marxin/bin/gcc/include/c++/9.0.0/ext/new_allocator.h:114
    #2 0x401ac2 in
std::allocator_traits<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >
>::allocate(std::allocator<std::_Sp_counted_ptr_inplace<S, std::allocator<S>,
(__gnu_cxx::_Lock_policy)2> >&, unsigned long)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/alloc_traits.h:444
    #3 0x40190b in
std::__allocated_ptr<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> > >
std::__allocate_guarded<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >
>(std::allocator<std::_Sp_counted_ptr_inplace<S, std::allocator<S>,
(__gnu_cxx::_Lock_policy)2> >&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/allocated_ptr.h:97
    #4 0x4017af in
std::__shared_count<(__gnu_cxx::_Lock_policy)2>::__shared_count<S,
std::allocator<S>>(std::_Sp_make_shared_tag, S*, std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr_base.h:655
    #5 0x4016e8 in std::__shared_ptr<S,
(__gnu_cxx::_Lock_policy)2>::__shared_ptr<std::allocator<S>>(std::_Sp_make_shared_tag,
std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr_base.h:1322
    #6 0x401658 in
std::shared_ptr<S>::shared_ptr<std::allocator<S>>(std::_Sp_make_shared_tag,
std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr.h:360
    #7 0x40155d in std::shared_ptr<S> std::allocate_shared<S,
std::allocator<S>>(std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr.h:703
    #8 0x401424 in std::shared_ptr<S> std::make_shared<S>()
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr.h:719
    #9 0x4011ab in main /home/marxin/Programming/testcases/pr87840.cpp:7
    #10 0x7ffff6db8fea in __libc_start_main ../csu/libc-start.c:308

SUMMARY: LeakSanitizer: 32 byte(s) leaked in 1 allocation(s).

I hope it's the leak you're seeking for?
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Subject: [Bug c++/87842] Member of class template hides template parameter of another member
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87842

Martin LiÅ¡ka <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 #1 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Dup.

*** This bug has been marked as a duplicate of bug 87841 ***
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87841

--- Comment #1 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
*** Bug 87842 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-619879-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 10:05:10 2018
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87824

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
In i686-linux bootstrap/regtest, I see:
                === gdc tests ===


Running target unix
FAIL: gdc.dg/compilable.d   -O0  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O0 -frelease  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O0 -frelease -g  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O0 -g  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O1  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O1 -frelease  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O1 -frelease -g  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O1 -g  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O2  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O2 -frelease  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O2 -frelease -g  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O2 -g  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O3  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O3 -frelease  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O3 -frelease -g  (test for excess errors)
FAIL: gdc.dg/compilable.d   -O3 -g  (test for excess errors)
FAIL: gdc.dg/compilable.d   -Os  (test for excess errors)
FAIL: gdc.dg/compilable.d   -Os -frelease  (test for excess errors)
FAIL: gdc.dg/compilable.d   -Os -frelease -g  (test for excess errors)
FAIL: gdc.dg/compilable.d   -Os -g  (test for excess errors)
FAIL: gdc.dg/simd.d   -O0  (test for excess errors)
FAIL: gdc.dg/simd.d   -O0 -frelease  (test for excess errors)
FAIL: gdc.dg/simd.d   -O0 -frelease -g  (test for excess errors)
FAIL: gdc.dg/simd.d   -O0 -g  (test for excess errors)
FAIL: gdc.dg/simd.d   -O1  (test for excess errors)
FAIL: gdc.dg/simd.d   -O1 -frelease  (test for excess errors)
FAIL: gdc.dg/simd.d   -O1 -frelease -g  (test for excess errors)
FAIL: gdc.dg/simd.d   -O1 -g  (test for excess errors)
FAIL: gdc.dg/simd.d   -O2  (test for excess errors)
FAIL: gdc.dg/simd.d   -O2 -frelease  (test for excess errors)
FAIL: gdc.dg/simd.d   -O2 -frelease -g  (test for excess errors)
FAIL: gdc.dg/simd.d   -O2 -g  (test for excess errors)
FAIL: gdc.dg/simd.d   -O3  (test for excess errors)
FAIL: gdc.dg/simd.d   -O3 -frelease  (test for excess errors)
FAIL: gdc.dg/simd.d   -O3 -frelease -g  (test for excess errors)
FAIL: gdc.dg/simd.d   -O3 -g  (test for excess errors)
FAIL: gdc.dg/simd.d   -Os  (test for excess errors)
FAIL: gdc.dg/simd.d   -Os -frelease  (test for excess errors)
FAIL: gdc.dg/simd.d   -Os -frelease -g  (test for excess errors)
FAIL: gdc.dg/simd.d   -Os -g  (test for excess errors)
FAIL: runnable/cppa.d   execution test
FAIL: runnable/cppa.d -g   execution test
FAIL: runnable/cppa.d -g -shared-libphobos   execution test
FAIL: runnable/cppa.d -shared-libphobos   execution test
FAIL: runnable/eh.d -O2   execution test
FAIL: runnable/eh.d -O2 -shared-libphobos   execution test
FAIL: runnable/nulltype.d   execution test
FAIL: runnable/nulltype.d -O2   execution test
FAIL: runnable/nulltype.d -O2 -shared-libphobos   execution test
FAIL: runnable/nulltype.d -g   execution test
FAIL: runnable/nulltype.d -g -O2   execution test
FAIL: runnable/nulltype.d -g -O2 -shared-libphobos   execution test
FAIL: runnable/nulltype.d -g -shared-libphobos   execution test
FAIL: runnable/nulltype.d -shared-libphobos   execution test
FAIL: runnable/template1.d   execution test
FAIL: runnable/template1.d -O2   execution test
FAIL: runnable/template1.d -O2 -frelease   execution test
FAIL: runnable/template1.d -O2 -frelease -shared-libphobos   execution test
FAIL: runnable/template1.d -O2 -shared-libphobos   execution test
FAIL: runnable/template1.d -frelease   execution test
FAIL: runnable/template1.d -frelease -shared-libphobos   execution test
FAIL: runnable/template1.d -g   execution test
FAIL: runnable/template1.d -g -O2   execution test
FAIL: runnable/template1.d -g -O2 -frelease   execution test
FAIL: runnable/template1.d -g -O2 -frelease -shared-libphobos   execution test
FAIL: runnable/template1.d -g -O2 -shared-libphobos   execution test
FAIL: runnable/template1.d -g -frelease   execution test
FAIL: runnable/template1.d -g -frelease -shared-libphobos   execution test
FAIL: runnable/template1.d -g -shared-libphobos   execution test
FAIL: runnable/template1.d -shared-libphobos   execution test

                === libphobos tests ===


Running target unix
FAIL: libphobos.unittests/phobos/shared/std.math
FAIL: libphobos.unittests/phobos/shared/std.typecons

The compilable.d/simd.d FAILs is something fixable through passing in
-Wno-psabi (the failures are because the compiler warns that -mmmx and/or -msse
or -msse2 changes ABI of some of the functions).  Guess one can reproduce that
even on x86_64 with --target_board=unix/-m32/-mno-sse/-mno-mmx .
The other FAILs are the same as yours, except for the libphobos tests.
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Subject: [Bug ipa/87843] New: [9 Regression] SPEC 2017 miscompilation of 502.gcc_r with -Ofast -march=native -g -flto=8 -fprofile-generate
Date: Thu, 01 Nov 2018 10:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

            Bug ID: 87843
           Summary: [9 Regression] SPEC 2017 miscompilation of 502.gcc_r
                    with -Ofast -march=native -g -flto=8
                    -fprofile-generate
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
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          Reporter: marxin at gcc dot gnu.org
                CC: marxin at gcc dot gnu.org
            Blocks: 26163
  Target Milestone: ---

Started with the same revision as PR87830, I see segfault of the benchmark.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
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Subject: [Bug ipa/87843] [9 Regression] SPEC 2017 miscompilation of 502.gcc_r with -Ofast -march=native -g -flto=8 -fprofile-generate
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2018-11-1
      Known to work|                            |8.2.0
           Assignee|unassigned at gcc dot gnu.org      |hubicka at gcc dot gnu.org
   Target Milestone|---                         |9.0
      Known to fail|                            |9.0
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

UroÅ¡ Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #44928|0                           |1
        is obsolete|                            |

--- Comment #37 from UroÅ¡ Bizjak <ubizjak at gmail dot com> ---
Created attachment 44940
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44940&action=edit
Proposed patch

I think that attached patch is close to final. We can use:

+  if (SUPPORTS_STACK_ALIGNMENT
+      && crtl->stack_realign_processed)

to avoid unnecessary updates before expand_stack_alignment is called.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #38 from UroÅ¡ Bizjak <ubizjak at gmail dot com> ---
(In reply to Terry Guo from comment #36)

> OK. Do it right now.

I think that latest attachment is the one that should be tested. Functionally
it is the same, but avoids unnecessary variable updates before
expand_stack_alignment is called. expand_stack_alignment will do everything for
us.
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Subject: [Bug c++/87844] New: ICE in tsubst_copy using non-constant expression as a non-type template argument
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87844

            Bug ID: 87844
           Summary: ICE in tsubst_copy using non-constant expression as a
                    non-type template argument
           Product: gcc
           Version: 8.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
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          Reporter: curlypaul924 at gmail dot com
  Target Milestone: ---

The following code causes ICE in every version I tried from 4.9.0 through 8.2,
as well as trunk:

struct C {
  static constexpr bool call(bool) { return true; }
};

template<bool b>
struct B {};

auto foo(bool b) {
  auto f = [](auto c) -> B<decltype(c)::call(b)> { };
  f(C());
}

int main() {
  foo(true);
}

Compile with either -std=c++14 or -std=c++17.

Clang (I believe correctly) rejects this code with "non-type template argument
is not a constant expression".
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Subject: [Bug bootstrap/87788] [9 Regression] Bootstrap fails for x86_64-apple-darwin* with default languages selection after D addition.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87788

--- Comment #14 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
(In reply to Iain Sandoe from comment #13)
> bootstrap succeeded on x86_64-darwin16 --enable-languages=all for 265659.
> 
> Shall we leave this PR open as a place to track getting D working on Darwin?
> .. or open a new one?
> 
> (I guess from the point of view of archeology, the latter might be better
> than re-classifying this one to 'target').

The fix for the front-end has been committed to upstream.  I'll commit all
changes to trunk that will enable the front-end compiler to at least be built
and bootstrapped, effectively closing this.

Which only leaves library support, that I'll be on after the dmd front-end
porting issues have been resolved.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87824

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Nov  1 11:14:08 2018
New Revision: 265713

URL: https://gcc.gnu.org/viewcvs?rev=265713&root=gcc&view=rev
Log:
        PR d/87824
        * lang.opt (Wpsabi): New option.

        * gdc.dg/simd.d: Add -Wno-psabi.
        * gdc.dg/compilable.d: Likewise.

Modified:
    trunk/gcc/d/ChangeLog
    trunk/gcc/d/lang.opt
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gdc.dg/compilable.d
    trunk/gcc/testsuite/gdc.dg/simd.d
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Subject: [Bug ipa/87843] [9 Regression] SPEC 2017 miscompilation of 502.gcc_r with -Ofast -march=native -g -flto=8 -fprofile-generate
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #1 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Would be possible to analyze this a bit?  The patch does have effect on
optimizers because we produce a lot fewer MEM_REFs on type mismatches. Of
course this should not trigger wrong code but it also may be some bug in
benchmark or so.
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Subject: [Bug c++/87841] Member of class template hides template parameter of another member
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87841

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |rejects-valid

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
That example was changed by DR 458 https://wg21.link/cwg458


GCC compiles it if C is not used in the parameter-list:

template<class T> struct A {
  struct B { /* ... */ };
  typedef void C;
  void f();
  template<class U> void g();
};

template<class B> void A<B>::f() {
  B b; // A's B, not the template parameter
}

template<class B> template<class C> void A<B>::g() {
  B b; // A's B, not the template parameter
  C c; // the template parameter C, not A's C
}

So GCC finds the right C in the function body. EDG also compiles that. Clang
doesn't:

dr458.cc:14:5: error: variable has incomplete type 'A::C' (aka 'void')
  C c; // the template parameter C, not A's C
    ^
1 error generated.


However for the example as given in [temp.local] (as in comment 0) in the
standard, none of the compilers I tried accept it, because C in the function
parameter-list finds A<B>::C (aka void) not the function template parameter.

GCC says:

dr458.cc:12:42: error: no declaration matches 'void A<T>::g()'
   12 | template<class B> template<class C> void A<B>::g(C) {
      |                                          ^~~~
dr458.cc:5:26: note: candidate is: 'template<class T> template<class U> void
A<T>::g(U)'
    5 |   template<class U> void g(U);
      |                          ^
dr458.cc:1:26: note: 'struct A<T>' defined here
    1 | template<class T> struct A {
      |                          ^


EDG says:

"dr458.cc", line 12: error: a parameter may not have void type
  template<class B> template<class C> void A<B>::g(C) {
                                                   ^

"dr458.cc", line 12: error: declaration is incompatible with function template
          "void A<T>::g(U)" (declared at line 5)
  template<class B> template<class C> void A<B>::g(C) {
                                                 ^

2 errors detected in the compilation of "dr458.cc".


Clang says:

dr458.cc:12:48: error: out-of-line definition of 'g' does not match any
declaration in 'A<T>'
template<class B> template<class C> void A<B>::g(C) {
                                               ^
dr458.cc:14:5: error: variable has incomplete type 'A::C' (aka 'void')
  C c; // the template parameter C, not A's C
    ^
2 errors generated.


And VC++ says:

<source>(12): error C2244: 'A<T>::g': unable to match function definition to an
existing declaration

<source>(12): note: see declaration of 'A<T>::g'

<source>(12): note: definition

<source>(12): note: 'void A<T>::g(void)'

<source>(12): note: existing declarations

<source>(12): note: 'void A<T>::g(U)'

Compiler returned: 2


This makes me think the example in [temp.local] is wrong!
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Subject: [Bug ipa/87843] [9 Regression] SPEC 2017 miscompilation of 502.gcc_r with -Ofast -march=native -g -flto=8 -fprofile-generate
Date: Thu, 01 Nov 2018 11:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #2 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #1)
> Would be possible to analyze this a bit?

I would leave it to you. Note that the same happens for SPEC2006 403.gcc
benchmark:

$ gdb --args
/home/marxin/Programming/cpu2006/benchspec/CPU2006/403.gcc/run/run_peak_ref_amd64-m64-mine.0001/gcc_peak.amd64-m64-mine
/home/marxin/Programming/cpu2006/benchspec/CPU2006/403.gcc/data/ref/input/scilab.in

$ Breakpoint 1, remove_useless_values () at cselib.c:394
394         abort ();
(gdb) bt
#0  remove_useless_values () at cselib.c:394
#1  cselib_process_insn (insn=0x1200a40) at cselib.c:1377
#2  0x000000000046fd48 in reload_cse_regs_1 (first=<optimized out>) at
reload1.c:8172
#3  0x00000000004700db in reload_cse_regs (first=0xd928c0) at reload1.c:8186
#4  0x000000000044a3ec in rest_of_compilation (decl=0x954000) at toplev.c:3254
#5  0x00000000005edd56 in c_expand_body.part.1.lto_priv.1473
(fndecl=fndecl@entry=0x954000, nested_p=nested_p@entry=0,
can_defer_p=can_defer_p@entry=1) at c-decl.c:7119
#6  0x00000000005ee710 in c_expand_body (can_defer_p=1, nested_p=0,
fndecl=0x954000) at c-decl.c:7024
#7  finish_function (nested=0, can_defer_p=1) at c-decl.c:6986
#8  0x00000000006072c0 in yyparse_1 () at c-parse.c:2186
#9  0x0000000000402fec in yyparse () at c-lex.c:164
#10 compile_file () at toplev.c:2126
#11 do_compile () at toplev.c:5221
#12 toplev_main (argv=<optimized out>, argc=<optimized out>) at toplev.c:5255
#13 main (argc=<optimized out>, argv=<optimized out>) at main.c:35


The patch does have effect on
> optimizers because we produce a lot fewer MEM_REFs on type mismatches. Of
> course this should not trigger wrong code but it also may be some bug in
> benchmark or so.

I doubt that.
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Subject: [Bug c++/87841] Member of class template hides template parameter of another member
Date: Thu, 01 Nov 2018 11:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87841

--- Comment #3 from Ole Kniemeyer <o_kniemeyer at maxon dot net> ---
Yes, I also tried other compilers, and all of them fail. But in [temp.local] it
is explicitly stated that "the name of a member of the class template hides the
name of a template-parameter of any enclosing class templates (BUT NOT A
TEMPLATE-PARAMETER OF THE MEMBER IF THE MEMBER IS A CLASS OR FUNCTION
TEMPLATE)". (Bold by me, that's the case of this bug.)
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Subject: [Bug ipa/87843] [9 Regression] SPEC 2017 miscompilation of 502.gcc_r with -Ofast -march=native -g -flto=8 -fprofile-generate
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #3 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
For 403.gcc one only needs: -O2 -g -flto=8
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Subject: [Bug fortran/54613] [F08] Add FINDLOC plus support MAXLOC/MINLOC with KIND=/BACKDate: Thu, 01 Nov 2018 11:37:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54613

--- Comment #19 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Nov  1 11:37:08 2018
New Revision: 265715

URL: https://gcc.gnu.org/viewcvs?rev=265715&root=gcc&view=rev
Log:
2018-10-28  Thomas Koenig  <tkoenig@gcc.gnu.org>

        PR fortran/54613
        * gfortran.texi (File format of unformatted sequential files):
        Replace random comma with period.
        * intrinsic.texi (Intrinsic Procedures): Add FINDLOC to menu.
        (FINDLOC): Document.
        (MAXLOC): Add refrence to FINDLOC.
        (MINLOC): Likewise.


Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/gfortran.texi
    trunk/gcc/fortran/intrinsic.texi
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Subject: [Bug rtl-optimization/87845] New: cselib_hasher::hash function does not match with cselib_hasher::equal operator
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87845

            Bug ID: 87845
           Summary: cselib_hasher::hash function does not match with
                    cselib_hasher::equal operator
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

As mentioned in the following sub-thread:
https://gcc.gnu.org/ml/gcc-patches/2018-10/msg01878.html
we have situations where ::equal returns true for a pair of value, which their
::hash value is different.

Let me demonstrate that on the following example:

$ cat toreduce.i
int a, c, d, e, f, i, j, k, l;
typedef struct {
  char b[8];
} g;
g h;

int o(int, int, int);
int p();
int q();

void m() {
  int n, b = o(a, d, e);
  if (b)
    goto ac;
  if (a)
    p();
  if (c)
    if (d)
      if (l == 0 && n == 0)
        ;
      else {
        h.b[7] = n >> 24;
        h.b[6] = n >> 16;
        h.b[5] = n >> 8;
        h.b[4] = n;
      }
  return;
ac:
  q(k, f, 1, l, &n, i, j);
}

If I apply following patch:
diff --git a/gcc/cselib.c b/gcc/cselib.c
index 6d3a4078c68..821bee6aa86 100644
--- a/gcc/cselib.c
+++ b/gcc/cselib.c
@@ -101,7 +101,7 @@ struct cselib_hasher : nofree_ptr_hash <cselib_val>
 inline hashval_t
 cselib_hasher::hash (const cselib_val *v)
 {
-  return v->hash;
+  return 0;
 }

 /* The equality test for our hash table.  The first argument V is a table

I see a divergence in:

$ diff -u /tmp/before/toreduce.i.279r.postreload
/tmp/after/toreduce.i.279r.postreload
--- /tmp/before/toreduce.i.279r.postreload      2018-11-01 12:48:01.046221868
+0100
+++ /tmp/after/toreduce.i.279r.postreload       2018-11-01 12:48:27.778779308
+0100
@@ -1,7 +1,6 @@

 ;; Function m (m, funcdef_no=0, decl_uid=1924, cgraph_uid=1, symbol_order=10)

-rescanning insn with uid = 46.
 starting the processing of deferred insns
 ending the processing of deferred insns

@@ -16,7 +15,7 @@
...@@ -181,7 +180,8 @@
 (insn 46 67 47 8 (parallel [
             (set (reg:CCZ 17 flags)
                 (compare:CCZ (ior:SI (reg:SI 0 ax [orig:101 l ] [101])
-                        (reg:SI 1 dx))
+                        (mem/c:SI (plus:DI (reg/f:DI 7 sp)
+                                (const_int 12 [0xc])) [1 n+0 S4 A32]))
                     (const_int 0 [0])))
             (clobber (reg:SI 0 ax [orig:101 l ] [101]))
         ]) "/home/marxin/Programming/tramp3d/toreduce.i":19:10 451 {*iorsi_3}

which eventually leads to following assembly divergence:

diff -u 1 2
--- 1   2018-11-01 12:52:07.839338756 +0100
+++ 2   2018-11-01 12:52:07.855339094 +0100
@@ -24,9 +24,9 @@
        movl    d(%rip), %eax
        testl   %eax, %eax
        je      .L1
-       movl    l(%rip), %eax
-       orl     12(%rsp), %eax
        movl    12(%rsp), %edx
+       movl    l(%rip), %eax
+       orl     %edx, %eax
        je      .L1
        movl    %edx, h+4(%rip)
 .L1:

Can please anybody familiar with cselib help me here?
Thanks
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Subject: [Bug fortran/46020] Improve error string for BIND(C) diagnostic for len>1 character return type
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--- Comment #9 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Nov  1 11:55:43 2018
New Revision: 265716

URL: https://gcc.gnu.org/viewcvs?rev=265716&root=gcc&view=rev
Log:
2018-11-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/46020
    * gfortran.dg/bind_c_usage_7.f90: Adjust error message.
    * gfortran.dg/bind_c_usage_32.f90: New test.


Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gfortran.dg/bind_c_usage_7.f03
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Subject: [Bug fortran/46020] Improve error string for BIND(C) diagnostic for len>1 character return type
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46020

--- Comment #10 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Nov  1 11:56:26 2018
New Revision: 265717

URL: https://gcc.gnu.org/viewcvs?rev=265717&root=gcc&view=rev
Log:
2018-11-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/46020
    * gfortran.dg/bind_c_usage_32.f90: Really commit.


Added:
    trunk/gcc/testsuite/gfortran.dg/bind_c_usage_32.f90
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Subject: [Bug libstdc++/87846] New: std::filesystem::create_directories with a path with a trailing slash does not create any directory
Date: Thu, 01 Nov 2018 12:01:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87846

            Bug ID: 87846
           Summary: std::filesystem::create_directories with a path with a
                    trailing slash does not create any directory
           Product: gcc
           Version: 8.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: arnaud02 at users dot sourceforge.net
  Target Milestone: ---

Calling std::filesystem::create_directories with a path with a trailing
separator (e.g. "./a/b/") does not create any directory.
VS 2017 15.8 creates the desired directories.

Is GCC incorrect?

>cat fs.cpp 
//
https://developercommunity.visualstudio.com/content/problem/278829/stdfilesystemcreate-directories-returns-false-if-p.html
#include <filesystem>
#include <iostream>

namespace fs = std::filesystem;

int main()
{
  fs::path d{"./a/b/"};
  // bug: d is not created due to trailing slash when built with GCC 8. Works
with VS2017.8.
  fs::create_directories(d);

  std::cout << std::boolalpha
            << fs::exists(d) << ' '
            << fs::is_directory(d) << '\n';
  for (auto const& e : fs::recursive_directory_iterator("."))
    std::cout << "In current_path: " << e.path() << '\n';
}
>g++ -std=c++17 fs.cpp -lstdc++fs 
>./a.out 
false false
In current_path: "./a.out"
In current_path: "./fs.cpp"
>gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/buildarea/opt/gcc/gcc-820-rh6/libexec/gcc/x86_64-pc-linux-gnu/8.2.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /tmp/gcc8/gcc-build/srcdir/gcc-8.2.0/configure
--prefix=/buildarea/opt/gcc/gcc-820-rh6 --enable-languages=c,c++,fortran
--disable-multilib
Thread model: posix
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Subject: [Bug fortran/46020] Improve error string for BIND(C) diagnostic for len>1 character return type
Date: Thu, 01 Nov 2018 12:02:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46020

--- Comment #11 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Nov  1 12:00:59 2018
New Revision: 265719

URL: https://gcc.gnu.org/viewcvs?rev=265719&root=gcc&view=rev
Log:
2018-11-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

        PR fortran/46020
        * decl.c (verify_bind_c_sym): Improve error message.


Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/decl.c
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/87847] New: spec_hasher::hash does not match with spec_hasher::equal
Date: Thu, 01 Nov 2018 12:05:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87847

            Bug ID: 87847
           Summary: spec_hasher::hash does not match with
                    spec_hasher::equal
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: jason at gcc dot gnu.org, mpolacek at gcc dot gnu.org,
                    nathan at gcc dot gnu.org
  Target Milestone: ---

Created attachment 44941
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44941&action=edit
patch to trigger the problem

As mentioned in following sub-thread:
https://gcc.gnu.org/ml/gcc-patches/2018-10/msg01885.html

There's violation of hash table in type_specializations hash table.
Attached patch exposes that.

$ ./xg++ -B. /home/marxin/Programming/gcc/gcc/testsuite/g++.dg/template/ttp23.C
-c
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/template/ttp23.C: In
instantiation of â€˜struct B<A>â€™:
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/template/ttp23.C:15:8:  
required from here
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/template/ttp23.C:8:17:
internal compiler error: in equal, at cp/pt.c:1699
    8 |     friend bool foo (const B<Q>& a);
      |                 ^~~
0x9c1b40 spec_hasher::equal(spec_entry*, spec_entry*)
        /home/marxin/Programming/gcc/gcc/cp/pt.c:1698
0xa48639 hash_table<spec_hasher, xcallocator>::find_with_hash(spec_entry*
const&, unsigned int)
        /home/marxin/Programming/gcc/gcc/hash-table.h:863
0x9e51f7 lookup_template_class_1
        /home/marxin/Programming/gcc/gcc/cp/pt.c:9353
0x9e785d lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
        /home/marxin/Programming/gcc/gcc/cp/pt.c:9680
0x9f46a4 tsubst_aggr_type
        /home/marxin/Programming/gcc/gcc/cp/pt.c:12685
0x9ff5ac tsubst(tree_node*, tree_node*, int, tree_node*)
        /home/marxin/Programming/gcc/gcc/cp/pt.c:14333
0x9ff527 tsubst(tree_node*, tree_node*, int, tree_node*)
        /home/marxin/Programming/gcc/gcc/cp/pt.c:14324
0x9fdb8b tsubst_arg_types
        /home/marxin/Programming/gcc/gcc/cp/pt.c:13930
0x9fe22e tsubst_function_type
        /home/marxin/Programming/gcc/gcc/cp/pt.c:14071
0xa018c3 tsubst(tree_node*, tree_node*, int, tree_node*)
        /home/marxin/Programming/gcc/gcc/cp/pt.c:14808
0x9f5dd1 tsubst_function_decl
        /home/marxin/Programming/gcc/gcc/cp/pt.c:12949
0x9f927f tsubst_template_decl
        /home/marxin/Programming/gcc/gcc/cp/pt.c:13253
0x9fa86b tsubst_decl
        /home/marxin/Programming/gcc/gcc/cp/pt.c:13355
0x9febb7 tsubst(tree_node*, tree_node*, int, tree_node*)
        /home/marxin/Programming/gcc/gcc/cp/pt.c:14251
0x9e9f42 tsubst_friend_function
        /home/marxin/Programming/gcc/gcc/cp/pt.c:10316
0x9ef597 instantiate_class_template_1
        /home/marxin/Programming/gcc/gcc/cp/pt.c:11365
0x9ef816 instantiate_class_template(tree_node*)
        /home/marxin/Programming/gcc/gcc/cp/pt.c:11430
0xa90c52 complete_type(tree_node*)
        /home/marxin/Programming/gcc/gcc/cp/typeck.c:138
0x8ea857 start_decl_1(tree_node*, bool)
        /home/marxin/Programming/gcc/gcc/cp/decl.c:5278
0x91285f start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
        /home/marxin/Programming/gcc/gcc/cp/decl.c:5241
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Subject: [Bug fortran/19276] [meta-bug] CHARACTER related bugs in gfortran
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19276
Bug 19276 depends on bug 46020, which changed state.

Bug 46020 Summary: Improve error string for BIND(C) diagnostic for len>1 character return type
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46020

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
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Subject: [Bug fortran/46020] Improve error string for BIND(C) diagnostic for len>1 character return type
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46020

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #12 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I don't think there is anything left to fix. Closing.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=32630
Bug 32630 depends on bug 46020, which changed state.

Bug 46020 Summary: Improve error string for BIND(C) diagnostic for len>1 character return type
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46020

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
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Subject: [Bug tree-optimization/87848] New: [9 Regression] internal compiler error: in compare_range_with_value, at vr-values.c:1665
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87848

            Bug ID: 87848
           Summary: [9 Regression] internal compiler error: in
                    compare_range_with_value, at vr-values.c:1665
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: steinar+gcc at gunderson dot no
  Target Milestone: ---

Created attachment 44942
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44942&action=edit
Reduced test case

gcc version 9.0.0 20181019 (experimental) [trunk revision 265316] (Debian
20181019-1) 

Seemingly there is a regression when compiling protobuf 3.6.1:

during GIMPLE pass: vrp
../extra/protobuf/protobuf-3.6.1/src/google/protobuf/util/internal/datapiece.cc:
In member function 'google::protobuf::util::StatusOr<T>
google::protobuf::util::converter::DataPiece::GenericConvert() const [with To =
double]':
../extra/protobuf/protobuf-3.6.1/src/google/protobuf/util/internal/datapiece.cc:323:14:
internal compiler error: in compare_range_with_value, at vr-values.c:1665
  323 | StatusOr<To> DataPiece::GenericConvert() const {
      |              ^~~~~~~~~
0x7fd9d3a1eb16 __libc_start_main
        ../csu/libc-start.c:310

GCC 8 works. I believe that also a GCC 9 snapshot from a month or two ago
worked.

Adding attachment with a reduced test case. Compile with -O or -O2.
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Subject: [Bug tree-optimization/87826] ubsan: gimple-ssa-store-merging.c:281
Date: Thu, 01 Nov 2018 12:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87826

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Nov  1 12:31:45 2018
New Revision: 265720

URL: https://gcc.gnu.org/viewcvs?rev=265720&root=gcc&view=rev
Log:
        PR tree-optimization/87826
        * gimple-ssa-store-merging.c (do_shift_rotate): Punt if count is
        negative or larger or equal to type's precision.

        * gcc.dg/pr87826.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr87826.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-store-merging.c
    trunk/gcc/testsuite/ChangeLog
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Subject: [Bug c++/87849] New: Missed optimization: useless for-loop must be eliminated
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87849

            Bug ID: 87849
           Summary: Missed optimization: useless for-loop must be
                    eliminated
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zamazan4ik at tut dot by
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gcc(trunk) with -O3 -std=c++17 for this code:

#include <vector>
#include <algorithm>

int foo(std::vector<int> v) {
    int l = v[0];
    for(const auto& x : v) {
        l = std::min(l, x);
    }

    for(const auto& x : v) {
        l = std::max(l, x);
    }

    return l;
}

gcc doesn't eliminate first loop, but gcc can, because first loop has no effect
in this function.
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Subject: [Bug c++/87850] New: Add fix-it hint for "invalid conversion from 'X' to 'X*'"
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87850

            Bug ID: 87850
           Summary: Add fix-it hint for "invalid conversion from 'X' to
                    'X*'"
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
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This fairly common mistake seems like an obvious candidate for a fix-it hint:

#include <pthread.h>
int main()
{
  pthread_key_t key;
  pthread_key_create(key, NULL);
}

Currently G++ says:

p.c: In function 'int main()':
p.c:5:22: error: invalid conversion from 'pthread_key_t' {aka 'unsigned int'}
to 'pthread_key_t*' {aka 'unsigned int*'} [-fpermissive]
    5 |   pthread_key_create(key, NULL);
      |                      ^~~
      |                      |
      |                      pthread_key_t {aka unsigned int}
In file included from p.c:1:
/usr/include/pthread.h:1112:47: note:   initializing argument 1 of 'int
pthread_key_create(pthread_key_t*, void (*)(void*))'
 1112 | extern int pthread_key_create (pthread_key_t *__key,
      |                                ~~~~~~~~~~~~~~~^~~~~


The obvious fix is to take the address of the variable i.e. &key

This should probably only be suggested when the argument is an lvalue
(otherwise you can't take its address) and when taking its address would give a
pointer of the correct type (so don't suggest taking the address of a const int
if the parameter wants a non-const int*).

Simplest form:

int foo(int*);

int main()
{
  int i = 0;
  foo(i);
}

fixit.cc: In function 'int main()':
fixit.cc:6:7: error: invalid conversion from 'int' to 'int*' [-fpermissive]
    6 |   foo(i);
      |       ^
      |       |
      |       int
fixit.cc:1:9: note:   initializing argument 1 of 'int foo(int*)'
    1 | int foo(int*);
      |         ^~~~

The fix-it would suggest inserting '&' before the parameter.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87840

--- Comment #2 from Jan Engelhardt <jengelh at inai dot de> ---
How could I go about debugging why such a backtrace won't show for me?
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Subject: [Bug c++/87849] Missed optimization: useless for-loop must be eliminated
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87849

--- Comment #1 from Alexander Zaitsev <zamazan4ik at tut dot by> ---
Same for code without using STL algorithms and containers:

int min(int a, int b)
{
    return a < b ? a : b;
}

int max(int a, int b)
{
    return a > b ? a : b;
}

int foo(int* v, int size) {
    int l = v[0];
    for(int i=0; i < size; ++i)
    {
        l = min(l, v[i]);
    }

    for(int i=0; i < size; ++i)
    {
        l = max(l, v[i]);
    }

    return l;
}


Result of function doesn't depend on the result of first loop and it can be
eliminated.
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Subject: [Bug sanitizer/87840] LSAN misses self-refential shared_ptrs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87840

--- Comment #4 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
What about this:

$ cat empty.c
int main()
{
  __builtin_malloc (12345);
  return 0;
}

$ gcc -fsanitize=leak empty.c && ./a.out 

=================================================================
==14721==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 12345 byte(s) in 1 object(s) allocated from:
    #0 0x7ffff713dbd8 in malloc (/usr/lib64/liblsan.so.0+0xfbd8)
    #1 0x40111f in main (/home/marxin/Programming/testcases/a.out+0x40111f)
    #2 0x7ffff6d90fea in __libc_start_main ../csu/libc-start.c:308

SUMMARY: LeakSanitizer: 12345 byte(s) leaked in 1 allocation(s).
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--- Comment #3 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
(In reply to Jan Engelhardt from comment #2)
> How could I go about debugging why such a backtrace won't show for me?

Good question. I use openSUSE Tumbleweed. Maybe try:
$ LSAN_OPTIONS="verbosity=111:detect_leaks=1" ./a.out
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--- Comment #39 from Terry Guo <xuepeng.guo at intel dot com> ---
(In reply to UroÅ¡ Bizjak from comment #38)
> (In reply to Terry Guo from comment #36)
> 
> > OK. Do it right now.
> 
> I think that latest attachment is the one that should be tested.
> Functionally it is the same, but avoids unnecessary variable updates before
> expand_stack_alignment is called. expand_stack_alignment will do everything
> for us.

Yes. The latest one works perfectly. Bootstrap and regression test on x86_64
show no problem. I also managed to build a gcc for i686-w64-mingw32 with SJLJ
enabled, the case can be compiled successfully.
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Subject: [Bug sanitizer/87840] LSAN misses self-refential shared_ptrs
Date: Thu, 01 Nov 2018 13:47:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87840

Jan Engelhardt <jengelh at inai dot de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
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         Resolution|---                         |WORKSFORME

--- Comment #5 from Jan Engelhardt <jengelh at inai dot de> ---
Must have made a mistake somewhere in the g++9 invocation... so I just reran a
number of flag combinations to be sure, and now observe:

14:39 a4:~ > export ASAN_OPTIONS="verbose=111:leak_detect=1"
14:39 a4:~ > export LSAN_OPTIONS="$ASAN_OPTIONS"
14:39 a4:~ > g++-8 -ggdb3 -fsanitize=leak x.cpp; ./a.out
14:39 a4:~ > g++-8 -ggdb3 -fsanitize=address -fsanitize=leak x.cpp; ./a.out
[blah]
SUMMARY: AddressSanitizer: 32 byte(s) leaked in 1 allocation(s).
14:39 a4:~ > g++-9 -ggdb3 -fsanitize=leak x.cpp; ./a.out
[blah]
SUMMARY: LeakSanitizer: 32 byte(s) leaked in 1 allocation(s).

So it does work, if only the right flags are used.
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Subject: [Bug sanitizer/87840] LSAN not always printing the leaks when -fsanitizedress is absent
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87840

Jan Engelhardt <jengelh at inai dot de> changed:

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----------------------------------------------------------------------------
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         Resolution|WORKSFORME                  |---
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Subject: [Bug sanitizer/87840] LSAN misses self-refential shared_ptrs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87840

--- Comment #6 from Jan Engelhardt <jengelh at inai dot de> ---
Found a case where g++-9 also misses a leak when -fsanitize=address is not
present.

14:47 a4:~ > cat y.cpp 
#include <memory>
struct S {
        std::shared_ptr<S> other;
};
int main()
{
        auto e = std::make_shared<S>();
        auto f = std::make_shared<S>();
        e->other = f;
        f->other = e;
}
14:48 a4:~ > g++-9 -ggdb3 -fsanitize=leak y.cpp; ./a.out
14:48 a4:~ > g++-9 -ggdb3 -fsanitize=address -fsanitize=leak y.cpp; ./a.out

=================================================================
==18624==ERROR: LeakSanitizer: detected memory leaks
[...]
Indirect leak of 32 byte(s) in 1 object(s) allocated from:
Indirect leak of 32 byte(s) in 1 object(s) allocated from:
SUMMARY: AddressSanitizer: 64 byte(s) leaked in 2 allocation(s).
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Subject: [Bug sanitizer/87840] LSAN not always printing the leaks when -fsanitizedress is absent
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87840

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
             Status|NEW                         |WAITING

--- Comment #7 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Can't confirm:

$ g++ --version
g++ (GCC) 9.0.0 20181101 (experimental)
$ g++-8 --version
g++-8 (SUSE Linux) 8.2.1 20180831 [gcc-8-branch revision 264010]

$ g++ -ggdb3 pr87840.cpp -fsanitize=leak && ./a.out 

=================================================================
==15731==ERROR: LeakSanitizer: detected memory leaks

Indirect leak of 32 byte(s) in 1 object(s) allocated from:
    #0 0x7ffff74fa7db in operator new(unsigned long)
/home/marxin/Programming/gcc/libsanitizer/lsan/lsan_interceptors.cc:222
    #1 0x401c7b in __gnu_cxx::new_allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >::allocate(unsigned long, void
const*) /home/marxin/bin/gcc/include/c++/9.0.0/ext/new_allocator.h:114
    #2 0x401b1a in
std::allocator_traits<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >
>::allocate(std::allocator<std::_Sp_counted_ptr_inplace<S, std::allocator<S>,
(__gnu_cxx::_Lock_policy)2> >&, unsigned long)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/alloc_traits.h:444
    #3 0x401963 in
std::__allocated_ptr<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> > >
std::__allocate_guarded<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >
>(std::allocator<std::_Sp_counted_ptr_inplace<S, std::allocator<S>,
(__gnu_cxx::_Lock_policy)2> >&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/allocated_ptr.h:97
    #4 0x401807 in
std::__shared_count<(__gnu_cxx::_Lock_policy)2>::__shared_count<S,
std::allocator<S>>(std::_Sp_make_shared_tag, S*, std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr_base.h:655
    #5 0x401740 in std::__shared_ptr<S,
(__gnu_cxx::_Lock_policy)2>::__shared_ptr<std::allocator<S>>(std::_Sp_make_shared_tag,
std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr_base.h:1322
    #6 0x4016b0 in
std::shared_ptr<S>::shared_ptr<std::allocator<S>>(std::_Sp_make_shared_tag,
std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr.h:360
    #7 0x4015b5 in std::shared_ptr<S> std::allocate_shared<S,
std::allocator<S>>(std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr.h:703
    #8 0x40147c in std::shared_ptr<S> std::make_shared<S>()
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr.h:719
    #9 0x4011b8 in main /home/marxin/Programming/testcases/pr87840.cpp:8
    #10 0x7ffff6db8fea in __libc_start_main ../csu/libc-start.c:308

Indirect leak of 32 byte(s) in 1 object(s) allocated from:
    #0 0x7ffff74fa7db in operator new(unsigned long)
/home/marxin/Programming/gcc/libsanitizer/lsan/lsan_interceptors.cc:222
    #1 0x401c7b in __gnu_cxx::new_allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >::allocate(unsigned long, void
const*) /home/marxin/bin/gcc/include/c++/9.0.0/ext/new_allocator.h:114
    #2 0x401b1a in
std::allocator_traits<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >
>::allocate(std::allocator<std::_Sp_counted_ptr_inplace<S, std::allocator<S>,
(__gnu_cxx::_Lock_policy)2> >&, unsigned long)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/alloc_traits.h:444
    #3 0x401963 in
std::__allocated_ptr<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> > >
std::__allocate_guarded<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >
>(std::allocator<std::_Sp_counted_ptr_inplace<S, std::allocator<S>,
(__gnu_cxx::_Lock_policy)2> >&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/allocated_ptr.h:97
    #4 0x401807 in
std::__shared_count<(__gnu_cxx::_Lock_policy)2>::__shared_count<S,
std::allocator<S>>(std::_Sp_make_shared_tag, S*, std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr_base.h:655
    #5 0x401740 in std::__shared_ptr<S,
(__gnu_cxx::_Lock_policy)2>::__shared_ptr<std::allocator<S>>(std::_Sp_make_shared_tag,
std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr_base.h:1322
    #6 0x4016b0 in
std::shared_ptr<S>::shared_ptr<std::allocator<S>>(std::_Sp_make_shared_tag,
std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr.h:360
    #7 0x4015b5 in std::shared_ptr<S> std::allocate_shared<S,
std::allocator<S>>(std::allocator<S> const&)
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr.h:703
    #8 0x40147c in std::shared_ptr<S> std::make_shared<S>()
/home/marxin/bin/gcc/include/c++/9.0.0/bits/shared_ptr.h:719
    #9 0x4011ac in main /home/marxin/Programming/testcases/pr87840.cpp:7
    #10 0x7ffff6db8fea in __libc_start_main ../csu/libc-start.c:308

SUMMARY: LeakSanitizer: 64 byte(s) leaked in 2 allocation(s).

$ g++-8 -ggdb3 pr87840.cpp -fsanitize=leak && ./a.out 

=================================================================
==15808==ERROR: LeakSanitizer: detected memory leaks

Indirect leak of 32 byte(s) in 1 object(s) allocated from:
    #0 0x7ffff74fa7db in operator new(unsigned long)
/home/marxin/Programming/gcc/libsanitizer/lsan/lsan_interceptors.cc:222
    #1 0x401d05 in __gnu_cxx::new_allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >::allocate(unsigned long, void
const*) /usr/include/c++/8/ext/new_allocator.h:111
    #2 0x401ba4 in
std::allocator_traits<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >
>::allocate(std::allocator<std::_Sp_counted_ptr_inplace<S, std::allocator<S>,
(__gnu_cxx::_Lock_policy)2> >&, unsigned long)
/usr/include/c++/8/bits/alloc_traits.h:436
    #3 0x4019b5 in
std::__allocated_ptr<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> > >
std::__allocate_guarded<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >
>(std::allocator<std::_Sp_counted_ptr_inplace<S, std::allocator<S>,
(__gnu_cxx::_Lock_policy)2> >&) /usr/include/c++/8/bits/allocated_ptr.h:97
    #4 0x40181b in
std::__shared_count<(__gnu_cxx::_Lock_policy)2>::__shared_count<S,
std::allocator<S>>(std::_Sp_make_shared_tag, S*, std::allocator<S> const&)
/usr/include/c++/8/bits/shared_ptr_base.h:654
    #5 0x401750 in std::__shared_ptr<S,
(__gnu_cxx::_Lock_policy)2>::__shared_ptr<std::allocator<S>>(std::_Sp_make_shared_tag,
std::allocator<S> const&) /usr/include/c++/8/bits/shared_ptr_base.h:1322
    #6 0x4016c0 in
std::shared_ptr<S>::shared_ptr<std::allocator<S>>(std::_Sp_make_shared_tag,
std::allocator<S> const&) /usr/include/c++/8/bits/shared_ptr.h:360
    #7 0x4015c5 in std::shared_ptr<S> std::allocate_shared<S,
std::allocator<S>>(std::allocator<S> const&)
/usr/include/c++/8/bits/shared_ptr.h:707
    #8 0x40148c in std::shared_ptr<S> std::make_shared<S>()
/usr/include/c++/8/bits/shared_ptr.h:723
    #9 0x4011b8 in main /home/marxin/Programming/testcases/pr87840.cpp:8
    #10 0x7ffff6db8fea in __libc_start_main ../csu/libc-start.c:308

Indirect leak of 32 byte(s) in 1 object(s) allocated from:
    #0 0x7ffff74fa7db in operator new(unsigned long)
/home/marxin/Programming/gcc/libsanitizer/lsan/lsan_interceptors.cc:222
    #1 0x401d05 in __gnu_cxx::new_allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >::allocate(unsigned long, void
const*) /usr/include/c++/8/ext/new_allocator.h:111
    #2 0x401ba4 in
std::allocator_traits<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >
>::allocate(std::allocator<std::_Sp_counted_ptr_inplace<S, std::allocator<S>,
(__gnu_cxx::_Lock_policy)2> >&, unsigned long)
/usr/include/c++/8/bits/alloc_traits.h:436
    #3 0x4019b5 in
std::__allocated_ptr<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> > >
std::__allocate_guarded<std::allocator<std::_Sp_counted_ptr_inplace<S,
std::allocator<S>, (__gnu_cxx::_Lock_policy)2> >
>(std::allocator<std::_Sp_counted_ptr_inplace<S, std::allocator<S>,
(__gnu_cxx::_Lock_policy)2> >&) /usr/include/c++/8/bits/allocated_ptr.h:97
    #4 0x40181b in
std::__shared_count<(__gnu_cxx::_Lock_policy)2>::__shared_count<S,
std::allocator<S>>(std::_Sp_make_shared_tag, S*, std::allocator<S> const&)
/usr/include/c++/8/bits/shared_ptr_base.h:654
    #5 0x401750 in std::__shared_ptr<S,
(__gnu_cxx::_Lock_policy)2>::__shared_ptr<std::allocator<S>>(std::_Sp_make_shared_tag,
std::allocator<S> const&) /usr/include/c++/8/bits/shared_ptr_base.h:1322
    #6 0x4016c0 in
std::shared_ptr<S>::shared_ptr<std::allocator<S>>(std::_Sp_make_shared_tag,
std::allocator<S> const&) /usr/include/c++/8/bits/shared_ptr.h:360
    #7 0x4015c5 in std::shared_ptr<S> std::allocate_shared<S,
std::allocator<S>>(std::allocator<S> const&)
/usr/include/c++/8/bits/shared_ptr.h:707
    #8 0x40148c in std::shared_ptr<S> std::make_shared<S>()
/usr/include/c++/8/bits/shared_ptr.h:723
    #9 0x4011ac in main /home/marxin/Programming/testcases/pr87840.cpp:7
    #10 0x7ffff6db8fea in __libc_start_main ../csu/libc-start.c:308

SUMMARY: LeakSanitizer: 64 byte(s) leaked in 2 allocation(s).

What version of g++-9 do you have? Note that I did libsanitizer merge
yesterday.
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Subject: [Bug fortran/87851] New: [8/9 Regression] Wrong return type for len_trim
Date: Thu, 01 Nov 2018 14:06:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87851

            Bug ID: 87851
           Summary: [8/9 Regression] Wrong return type for len_trim
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tkoenig at gcc dot gnu.org
  Target Milestone: ---

Looking at PR 87711, it struck me that we have a type mismatch
between the library version of len_trim and what the compiler
generates.

The library side has, in string_intrinsics_inc.c,

/* The length of a string not including trailing blanks.  */

gfc_charlen_type
string_len_trim (gfc_charlen_type len, const CHARTYPE *s)

and the compiler generates for

program main
  character(len=3) :: c
  c = 'a  '
  print *,len_trim(c)
end program main

   _gfortran_st_write (&dt_parm.0);
    {
      integer(kind=4) D.3818;

      D.3818 = (integer(kind=4)) _gfortran_string_len_trim (3, &c);
      _gfortran_transfer_integer_write (&dt_parm.0, &D.3818, 4);
    }
    _gfortran_st_write_done (&dt_parm.0);

on a 64-bit system.
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Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
It indeed looks interesting. 
- Crash indeed goes away if one disables type merging.
- Fat LTO objects are OK so it does not seem to be free lang data confusing
early opts.
- remove_useless_values looks identical in both binaries.

So it indeed seems to be consequence of having fewer MEM_REFs in the stmt
stream.  I will try to localize it better.

Honza
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Subject: [Bug fortran/87851] [8/9 Regression] Wrong return type for len_trim
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87851

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jb at gcc dot gnu.org
             Blocks|                            |87711
   Target Milestone|---                         |8.3

--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
I might add that the patch I thought semi-obvious

Index: iresolve.c
===================================================================
--- iresolve.c  (Revision 265502)
+++ iresolve.c  (Arbeitskopie)
@@ -1518,16 +1518,42 @@ gfc_resolve_len (gfc_expr *f, gfc_expr *string, gf
                      gfc_default_integer_kind);
 }

+void gfc_debug_expr (gfc_expr *);

 void
 gfc_resolve_len_trim (gfc_expr *f, gfc_expr *string, gfc_expr *kind)
 {
+  int fkind;
+
+
   f->ts.type = BT_INTEGER;
   if (kind)
-    f->ts.kind = mpz_get_si (kind->value.integer);
+    {
+      fkind = mpz_get_si (kind->value.integer);
+
+      /* Remove the kind argument.  */
+      gfc_free_expr (kind);
+      f->value.function.actual->next->expr = NULL;
+
+    }
   else
-    f->ts.kind = gfc_default_integer_kind;
+    fkind = gfc_default_integer_kind;
+
+  f->ts.kind = gfc_charlen_int_kind;
   f->value.function.name = gfc_get_string ("__len_trim%d", string->ts.kind);
+#if 1
+  if (fkind != f->ts.kind)
+    {
+      gfc_typespec ts;
+      gfc_clear_ts (&ts);
+
+      ts.type = BT_INTEGER;
+      ts.kind = fkind;
+      gfc_convert_type_warn (f, &ts, 2, 0);
+    }
+#endif
+  fprintf(stderr,"%d\n", fkind);
+  gfc_debug_expr (f);
 }

fails on

program p
   character(3) :: c(2) = ['abc', 'xyz']
   print *, len_trim(c,4)
   print *, len_trim(c,8)
end

with a segfault somewhere in the scalarizer.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87711
[Bug 87711] ICE in gfc_trans_transfer, at fortran/trans-io.c:2676
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Subject: [Bug sanitizer/87840] LSAN not always printing the leaks when -fsanitizedress is absent
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87840

--- Comment #8 from Jan Engelhardt <jengelh at inai dot de> ---
g++-9 from openSUSE devel:gcc, the rest from Tumbleweed, SVN numbers see -v
banners above.
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Subject: [Bug sanitizer/87840] LSAN not always printing the leaks when -fsanitizedress is absent
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87840

--- Comment #9 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
(In reply to Jan Engelhardt from comment #8)
> g++-9 from openSUSE devel:gcc, the rest from Tumbleweed, SVN numbers see -v
> banners above.

Ok, the trunk version is before libsanitizer merge. Please try it after the
devel project will built new versions.
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Subject: [Bug middle-end/87852] New: [9 Regression] FAIL: gcc.c-torture/execute/pr53465.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87852

            Bug ID: 87852
           Summary: [9 Regression] FAIL: gcc.c-torture/execute/pr53465.c
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: rguenther at suse dot de
  Target Milestone: ---

On x86, r265677 caused:

FAIL: gcc.c-torture/execute/pr53465.c   -O1  execution test
FAIL: gcc.c-torture/execute/pr53465.c   -O2  execution test
FAIL: gcc.c-torture/execute/pr53465.c   -O3 -fomit-frame-pointer -funroll-loops 
-fpeel-loops -ftracer -finline-functions  execution test
FAIL: gcc.c-torture/execute/pr53465.c   -O3 -g  execution test
FAIL: gcc.c-torture/execute/pr53465.c   -O2 -flto -fno-use-linker-plugin
-flto-p
artition=none  execution test
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Subject: [Bug c++/87844] ICE in tsubst_copy using non-constant expression as a non-type template argument
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87844

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-invalid-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-11-01
                 CC|                            |mpolacek at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.  Could be fixed as a side-effect of implementing P0732R2.
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Subject: [Bug c++/87844] [7/8/9 Regression] ICE in tsubst_copy using non-constant expression as a non-type template argument
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87844

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |7.4
            Summary|ICE in tsubst_copy using    |[7/8/9 Regression] ICE in
                   |non-constant expression as  |tsubst_copy using
                   |a non-type template         |non-constant expression as
                   |argument                    |a non-type template
                   |                            |argument
>From gcc-bugs-return-619923-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 14:56:11 2018
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Subject: [Bug middle-end/87852] [9 Regression] FAIL: gcc.c-torture/execute/pr53465.c
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87852

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-11-01
                 CC|                            |marxin at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Confirmed.
>From gcc-bugs-return-619924-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 15:08:17 2018
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From: "derek.mauro at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/87853] New: _mm_cmpgt_epi8 broken with -funsigned-char
Date: Thu, 01 Nov 2018 15:08:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87853

            Bug ID: 87853
           Summary: _mm_cmpgt_epi8 broken with -funsigned-char
           Product: gcc
           Version: 7.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: derek.mauro at gmail dot com
  Target Milestone: ---

_mm_cmpgt_epi8 (and probably some related methods) are broken with
-funsigned-char

https://software.intel.com/en-us/node/524239 says specifically that it
"compares the 16 *signed* 8-bit integers in a and the 16 *signed* 8-bit
integers in b for greater than."

GCC's implementation of _mm_cmpgt_epi8:
https://github.com/gcc-mirror/gcc/blob/913b81c4d40ca6e1b157ea5785376d8de58b42fc/gcc/config/i386/emmintrin.h#L1331-L1335

and __v16qi:
https://github.com/gcc-mirror/gcc/blob/913b81c4d40ca6e1b157ea5785376d8de58b42fc/gcc/config/i386/emmintrin.h#L47

So I think a type with "signed char" instead of just "char" is needed to
implement _mm_cmpgt_epi8 correctly

Clang seems to get this right:
https://github.com/llvm-mirror/clang/blob/5fd1ab66bf97297c2b71ce3ec2bb33d579bca06e/lib/Headers/emmintrin.h#L3247-L3253

Here is a small repro program that you can compile with and without
-funsigned-char to see the difference:

#include <stdio.h>
#include <x86intrin.h>

int main() {
  int i;
  signed char a[16] = {-1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1};
  signed char b[16] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  __m128i c = _mm_cmpgt_epi8(_mm_load_si128((const __m128i*)a),
                             _mm_load_si128((const __m128i*)b));
  for (i = 0; i < 16; ++i) {
    unsigned char* result = (unsigned char*)&c;
    printf("result[%d]=%d\n", i, (int)result[i]);
  }
};
>From gcc-bugs-return-619925-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 15:22:19 2018
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From: "hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #5 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I think this is caused by misoptimizing
     void **x;
     void *info ATTRIBUTE_UNUSED;
{
  cselib_val *v = (cselib_val *)*x;
  struct elt_loc_list **p = &v->locs;
  int had_locs = v->locs != 0;

  while (*p)
    {
      if (references_value_p ((*p)->loc, 1))
        unchain_one_elt_loc_list (p);
      else
        p = &(*p)->next;
    }

  if (had_locs && v->locs == 0)
    {
      n_useless_values++;
      values_became_useless = 1;
    }
  return 1;
}

where fre1 after type cleaning concludes that v->locs is unchanged while it is
unchanged in:

static void
unchain_one_elt_loc_list (pl)
     struct elt_loc_list **pl;
{
  struct elt_loc_list *l = *pl;

  *pl = l->next;
  l->next = empty_elt_loc_lists;
  empty_elt_loc_lists = l;
}

So it seems that in some cases alias analysis gets lost in pointer dereferences
while we are still in early optimization. 

Perhaps we want to produce alias sets earlier?

Honza
>From gcc-bugs-return-619926-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 15:43:56 2018
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From: "jozef.l at mittosystems dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/87854] New: [9 Regression] gcc.c-torture/compile/pr46534.c ICE for 16-bit size_t
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87854

            Bug ID: 87854
           Summary: [9 Regression] gcc.c-torture/compile/pr46534.c ICE for
                    16-bit size_t
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jozef.l at mittosystems dot com
  Target Milestone: ---

The constant string in this test is 2 * (10^7) long (a 25-bit number), on these
16-bit targets, size_t is an unsigned 16-bit int.

The test starts ICE'ing with r264292. The test successfully compiles for both
msp430 and avr with r264291.

> internal compiler error: in get_constant_size, at varasm.c:3310
> 17 |   printf (S7 "\n");
>    |
> 0xe7342c get_constant_size
>   ../../gcc/varasm.c:3309
> 0xe7b6e7 assemble_constant_contents
>   ../../gcc/varasm.c:3478
> 0xe84178 output_constant_def_contents
>   ../../gcc/varasm.c:3528
> 0xe80d28 maybe_output_constant_def_contents
>   ../../gcc/varasm.c:3466
> 0xe80d28 output_constant_def(tree_node*, int)
>   ../../gcc/varasm.c:3432
> 0x82027e expand_expr_constant
>   ../../gcc/expr.c:7821
> 0x82027e expand_expr_addr_expr_1
>   ../../gcc/expr.c:7848
> 0x81ffd0 expand_expr_addr_expr_1
>   ../../gcc/expr.c:7966
> 0x813f1a expand_expr_addr_expr
>   ../../gcc/expr.c:8042
> 0x813f1a expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
>   ../../gcc/expr.c:11174
> 0x6da659 expand_normal
>   ../../gcc/expr.h:285
> 0x6da659 precompute_register_parameters
>   ../../gcc/calls.c:976
> 0x6da659 expand_call(tree_node*, rtx_def*, int)
>   ../../gcc/calls.c:3990
> 0x6c929d expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
>   ../../gcc/builtins.c:8136
> 0x814128 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool)
>   ../../gcc/expr.c:10943
> 0x6ef055 expand_expr
>   ../../gcc/expr.h:279
> 0x6ef055 expand_call_stmt
>   ../../gcc/cfgexpand.c:2694
> 0x6ef055 expand_gimple_stmt_1
>   ../../gcc/cfgexpand.c:3582
> 0x6ef683 expand_gimple_stmt
>   ../../gcc/cfgexpand.c:3741
> 0x6f07ab expand_gimple_basic_block
>   ../../gcc/cfgexpand.c:5777

The ICE then moves to expr.c with r264300

> internal compiler error: in string_constant, at expr.c:11415
> 0x811c13 string_constant(tree_node*, tree_node**, tree_node**, tree_node**)
>   ../../gcc/expr.c:11414
> 0x846d7b c_getstr(tree_node*, unsigned long*, unsigned long*)
>   ../../gcc/fold-const.c:14579
> 0x8b5da2 gimple_fold_builtin_printf
>   ../../gcc/gimple-fold.c:3366
> 0x8afd19 gimple_fold_builtin
>   ../../gcc/gimple-fold.c:3755
> 0x8b1c44 gimple_fold_call
>   ../../gcc/gimple-fold.c:4146
> 0x8b320a fold_stmt_1
>   ../../gcc/gimple-fold.c:4811
> 0x8eb5b0 gimplify_call_expr
>   ../../gcc/gimplify.c:3422
> 0x8d9518 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*), int)
>   ../../gcc/gimplify.c:11576
> 0x8ddc26 gimplify_stmt(tree_node**, gimple**)
>   ../../gcc/gimplify.c:6614
> 0x8df035 gimplify_bind_expr
>   ../../gcc/gimplify.c:1331
> 0x8d9181 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*), int)
>   ../../gcc/gimplify.c:11805
> 0x8ddc26 gimplify_stmt(tree_node**, gimple**)
>   ../../gcc/gimplify.c:6614
> 0x8dfd96 gimplify_body(tree_node*, bool)
>   ../../gcc/gimplify.c:12799
> 0x8e0314 gimplify_function_tree(tree_node*)
>   ../../gcc/gimplify.c:12943
> 0x732497 cgraph_node::analyze()
>   ../../gcc/cgraphunit.c:669
> 0x73596a analyze_functions
>   ../../gcc/cgraphunit.c:1122
> 0x7367a2 symbol_table::finalize_compilation_unit()
>   ../../gcc/cgraphunit.c:2760

Rather than ICE'ing should there be some error message about object size being
too large?
>From gcc-bugs-return-619927-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 15:46:17 2018
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Subject: [Bug c++/58372] internal compiler error: ix86_compute_frame_layout
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58372

--- Comment #40 from UroÅ¡ Bizjak <ubizjak at gmail dot com> ---
(In reply to Terry Guo from comment #39)
> (In reply to UroÅ¡ Bizjak from comment #38)
> > (In reply to Terry Guo from comment #36)
> > 
> > > OK. Do it right now.
> > 
> > I think that latest attachment is the one that should be tested.
> > Functionally it is the same, but avoids unnecessary variable updates before
> > expand_stack_alignment is called. expand_stack_alignment will do everything
> > for us.
> 
> Yes. The latest one works perfectly. Bootstrap and regression test on x86_64
> show no problem. I also managed to build a gcc for i686-w64-mingw32 with
> SJLJ enabled, the case can be compiled successfully.

Then we can just move the call to finish_eh_generation in pass_expand::execute
in front of expand_stack_alignment:

--cut here--
Index: cfgexpand.c
===================================================================
--- cfgexpand.c (revision 265582)
+++ cfgexpand.c (working copy)
@@ -6510,6 +6510,12 @@ pass_expand::execute (function *fun)
   find_many_sub_basic_blocks (blocks);
   purge_all_dead_edges ();

+  /* After initial rtl generation, call back to finish generating
+     exception support code.  We need to do this before cleaning up
+     the CFG as the code does not expect dead landing pads.  */
+  if (fun->eh->region_tree != NULL)
+    finish_eh_generation ();
+
   expand_stack_alignment ();

   /* Fixup REG_EQUIV notes in the prologue if there are tailcalls in this
@@ -6517,12 +6523,6 @@ pass_expand::execute (function *fun)
   if (crtl->tail_call_emit)
     fixup_tail_calls ();

-  /* After initial rtl generation, call back to finish generating
-     exception support code.  We need to do this before cleaning up
-     the CFG as the code does not expect dead landing pads.  */
-  if (fun->eh->region_tree != NULL)
-    finish_eh_generation ();
-
   /* BB subdivision may have created basic blocks that are are only reachable
      from unlikely bbs but not marked as such in the profile.  */
   if (optimize)
--cut here--

And indeed, the above patch works without problems for me.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82857

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-11-01
                 CC|                            |vries at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Test-case:
...
$ cat bt.c
#include "backtrace.h"

int
main (void)
{
  struct backtrace_state *state = backtrace_create_state ("./a.out", 0, NULL,
NULL);

  backtrace_print (state, 0, stderr);

  return 0;
}
...

Test script:
...
$ cat test.sh
#!/bin/sh

###########################

rm -Rf a.out ./a.out.debug

###########################

src=bt.c
pwd=$(pwd -P)

gcc_src=$pwd/src
gcc_build=$pwd/build

CFLAGS="-I $gcc_src/libbacktrace"
LDFLAGS="-lbacktrace -L $gcc_build/libbacktrace/.libs/"

gcc $src -O0 -g $CFLAGS $LDFLAGS

###########################

echo "Non-stripped"
./a.out 2>&1 | grep -c /bt.c

###########################

cp a.out a.out.debug
strip --only-keep-debug a.out.debug 
cp a.out.debug a.out.debug.saved

###########################

objcopy --strip-debug ./a.out
#strip a.out

echo "Stripped"
./a.out 2>&1  | grep -c /bt.c

###########################

objcopy --add-gnu-debuglink=a.out.debug ./a.out

echo "Stripped with debuglink"
./a.out 2>&1 | grep -c /bt.c

###########################

objcopy a.out.debug --compress-debug-sections=zlib

# We need to reset the debuglink, because the checksum has changed
objcopy -R .gnu_debuglink ./a.out
objcopy --add-gnu-debuglink=a.out.debug ./a.out

echo "Stripped with debuglink to compressed with objcopy"
./a.out 2>&1 | grep -c /bt.c

###########################

cp a.out.debug.saved a.out.debug

dwz a.out.debug

# We need to reset the debuglink, because the checksum has changed
objcopy -R .gnu_debuglink ./a.out
objcopy --add-gnu-debuglink=a.out.debug ./a.out

echo "Stripped with debuglink to compressed with dwz"
./a.out 2>&1 | grep -c /bt.c

###########################

cp a.out.debug.saved a.out.debug
cp a.out.debug.saved a.out.2.debug

dwz -m common.debug a.out.debug a.out.2.debug

# We need to reset the debuglink, because the checksum has changed
objcopy -R .gnu_debuglink ./a.out
objcopy --add-gnu-debuglink=a.out.debug ./a.out

echo "Stripped with debuglink to compressed with dwz -m"
./a.out 2>&1 | grep -c /bt.c
...

Test output:
...
$ ./test.sh
Non-stripped
1
Stripped
0
Stripped with debuglink
1
Stripped with debuglink to compressed with objcopy
1
Stripped with debuglink to compressed with dwz
1
Stripped with debuglink to compressed with dwz -m
0
...

Confirmed on master.
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Subject: [Bug other/82857] libbacktrace: please support binaries stripped with dwz -m (following the .gnu_debugaltlink)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82857

Ian Lance Taylor <ian at airs dot com> changed:

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----------------------------------------------------------------------------
                 CC|                            |ian at airs dot com

--- Comment #2 from Ian Lance Taylor <ian at airs dot com> ---
Are there any docs for the dwz -m format or for .gnu.debugaltlink?
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Subject: [Bug other/82857] libbacktrace: please support binaries stripped with dwz -m (following the .gnu_debugaltlink)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82857

--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
The dwz man shows:
...
      -M NAME --multifile-name NAME
              Specify the name of the common file that should be put into  the 
.gnu_debugaltlink  section  alongside
              with its build ID.  By default dwz puts there the argument of the
-m option.
...

The debugaltlink looks like:
...
$ objdump -s a.out.debug
Contents of section .gnu_debugaltlink:
 0000 636f6d6d 6f6e2e64 65627567 00583730  common.debug.X70
 0010 8a56187b b2abdbbd 93929f3f f623059e  .V.{.......?.#..
 0020 2f                                   /               
...

and given that this is the buildid of common.debug:
...
$ file common.debug 
common.debug: ELF 64-bit LSB relocatable, x86-64, version 1 (SYSV),
BuildID[sha1]=5837308a56187bb2abdbbd93929f3ff623059e2f, with debug_info, not
stripped
...
indeed .gnu_debugaltlink looks like the zero-terminated "common.debug" string
followed by the buildid.
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Subject: [Bug libstdc++/87855] New: std::optional<T> only copy-constructible if T is trivially copy-constructible
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87855

            Bug ID: 87855
           Summary: std::optional<T> only copy-constructible if T is
                    trivially copy-constructible
           Product: gcc
           Version: 8.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fiesh at zefix dot tv
  Target Milestone: ---

For a type T that is non-trivially copy constructible, std::optional<T> is not
copy constructible.  However, only clang catches this behavior.  I think clang
is right in doing so because a union's copy constructor is deleted if at least
one of its members has a non-trivial one.  (If this is true, is it a separate
gcc bug that it does not delete the union's constructor?)

The following program exemplifies this:

#include <optional>

struct S
{
        S() = default;
        S(S const &) {}
};

void f()
{
        using T = std::optional<S>;

        const T t0;

        const auto t1 = t0;
        (void) t1;
}

clang reports:

/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/include/g++-v8/optional:268:9: error:
call to implicitly-deleted copy constructor of 'std::_Optional_payload<S,
true, true, true>'
      : _Optional_payload(__engaged ?
        ^                 ~~~~~~~~~~~
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/include/g++-v8/optional:733:4: note: in
instantiation of member function 'std::_Optional_payload<S, true, true,
true>::_Optional_payload' requested here
        : _M_payload(__other._M_payload._M_engaged,
          ^
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/include/g++-v8/optional:985:11: note: in
instantiation of member function 'std::_Optional_base<S, false, false>:
:_Optional_base' requested here
    class optional
          ^
/tmp/t.cpp:15:18: note: in implicit copy constructor for 'std::optional<S>'
first required here
        const auto t1 = t0;
                        ^
/usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/include/g++-v8/optional:288:24: note:
copy constructor of '_Optional_payload<S, true, true, true>' is implicitly
 deleted because variant field '_M_payload' has a non-trivial copy constructor
          _Stored_type _M_payload;
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UroÅ¡ Bizjak <ubizjak at gmail dot com> changed:

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----------------------------------------------------------------------------
                 CC|                            |hjl.tools at gmail dot com

--- Comment #1 from UroÅ¡ Bizjak <ubizjak at gmail dot com> ---
Adding CC.
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H.J. Lu <hjl.tools at gmail dot com> changed:

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----------------------------------------------------------------------------
                 CC|                            |xuepeng.guo at intel dot com

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Xuepeng, can you take a look?
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From: "ville.voutilainen at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/87855] std::optional<T> only copy-constructible if T is trivially copy-constructible
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Ville Voutilainen <ville.voutilainen at gmail dot com> changed:

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----------------------------------------------------------------------------
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     Ever confirmed|0                           |1

--- Comment #1 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
Created attachment 44943
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44943&action=edit
A proposed patch

I have attached a candidate fix. Can you check whether it fixes the problem?
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--- Comment #13 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Nov  1 18:41:28 2018
New Revision: 265727

URL: https://gcc.gnu.org/viewcvs?rev=265727&root=gcc&view=rev
Log:
2018-11-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/46020
    * gfortran.dg/bind_c_18.f90: Adjust error message.


Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gfortran.dg/bind_c_18.f90
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Subject: [Bug fortran/87782] [9 Regression] runtime error: load of value 1818451807, which is not a valid value for type 'expr_t'
Date: Thu, 01 Nov 2018 18:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87782

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |tkoenig at gcc dot gnu.org

--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Index: frontend-passes.c
===================================================================
--- frontend-passes.c   (Revision 265722)
+++ frontend-passes.c   (Arbeitskopie)
@@ -638,23 +638,27 @@ constant_string_length (gfc_expr *e)
        return gfc_copy_expr(length);
     }

-  /* Return length of substring, if constant. */
+  /* See if there is a substring. If it has a constant length, return
+     that and NULL otherwise.  */
   for (ref = e->ref; ref; ref = ref->next)
     {
-      if (ref->type == REF_SUBSTRING
-         && gfc_dep_difference (ref->u.ss.end, ref->u.ss.start, &value))
+      if (ref->type == REF_SUBSTRING)
        {
-         res = gfc_get_constant_expr (BT_INTEGER, gfc_charlen_int_kind,
-                                      &e->where);
+         if (gfc_dep_difference (ref->u.ss.end, ref->u.ss.start, &value))
+           {
+             res = gfc_get_constant_expr (BT_INTEGER, gfc_charlen_int_kind,
+                                          &e->where);

-         mpz_add_ui (res->value.integer, value, 1);
-         mpz_clear (value);
-         return res;
+             mpz_add_ui (res->value.integer, value, 1);
+             mpz_clear (value);
+             return res;
+           }
+         else
+           return NULL;
        }
     }

   /* Return length of char symbol, if constant.  */
-
   if (e->symtree && e->symtree->n.sym->ts.u.cl
       && e->symtree->n.sym->ts.u.cl->length
       && e->symtree->n.sym->ts.u.cl->length->expr_type == EXPR_CONSTANT)
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Subject: [Bug fortran/87782] [9 Regression] runtime error: load of value 1818451807, which is not a valid value for type 'expr_t'
Date: Thu, 01 Nov 2018 18:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87782

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
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--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
The patch fixes this - if we have a substring, we should not look
at the symbol length.
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Subject: [Bug libfortran/87856] New: Use subdir-objects in libgfortran automake
Date: Thu, 01 Nov 2018 19:09:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87856

            Bug ID: 87856
           Summary: Use subdir-objects in libgfortran automake
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libfortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jb at gcc dot gnu.org
  Target Milestone: ---

Following the recent upgrade to autoconf 2.69 and automake 1.15.1, we should
switch libgfortran to use the "subdir-objects" option for automake. However,
the patch

diff --git a/libgfortran/configure.ac b/libgfortran/configure.ac
index 76007d38f6f..5f18834bacc 100644
--- a/libgfortran/configure.ac
+++ b/libgfortran/configure.ac
@@ -57,7 +57,7 @@ AC_SUBST(target_alias)

 # Sets up automake.  Must come after AC_CANONICAL_SYSTEM.  Each of the
 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
-#  1.9.6:  minimum required version
+#  subdir-objects:  Put objects in subdirs per source path.
 #  no-define:  PACKAGE and VERSION will not be #define'd in config.h (a bunch
 #              of other PACKAGE_* variables will, however, and there's nothing
 #              we can do about that; they come from AC_INIT).
@@ -66,7 +66,7 @@ AC_SUBST(target_alias)
 #  no-dist:  we don't want 'dist' and related rules.
 #  -Wall:  turns on all automake warnings...
 #  -Wno-portability:  ...except this one, since GNU make is required.
-AM_INIT_AUTOMAKE([1.9.6 no-define foreign no-dist -Wall -Wno-portability])
+AM_INIT_AUTOMAKE([subdir-objects no-define foreign no-dist -Wall
-Wno-portability])

 AM_MAINTAINER_MODE
 AM_ENABLE_MULTILIB(, ..)


and then running autoreconf, and trying to build libgfortran results on lots of
failures like:

Makefile:3910: ../../../trunk-git/libgfortran/generated/.deps/all_l1.Plo: No
such file or directory         
Makefile:3911: ../../../trunk-git/libgfortran/generated/.deps/all_l16.Plo: No
such file or directory      
Makefile:3912: ../../../trunk-git/libgfortran/generated/.deps/all_l2.Plo: No
such file or directory        
...

Per
https://stackoverflow.com/questions/21609580/autotools-build-fails-due-to-subdir-objects-option-in-am-init-automake
this is likely due to the paths to the generated objects in libgfortran being
specified relative to $(srcdir) in Makefile.am, like

i_all_c= \
$(srcdir)/generated/all_l1.c \
$(srcdir)/generated/all_l2.c \
...


However, removing the $(srcdir) would likely break regenerating these files
from the M4 sources, since they would then be regenerated in the build tree,
and not the source tree.

So some rethinking of the libgfortran build is most likely in order.
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Subject: [Bug fortran/40196] [F03] [F08] Type parameter inquiry (str%len, a%kind) and Complex parts (z%re, z%im)
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=40196

--- Comment #11 from Paul Thomas <pault at gcc dot gnu.org> ---
Author: pault
Date: Thu Nov  1 19:36:08 2018
New Revision: 265729

URL: https://gcc.gnu.org/viewcvs?rev=265729&root=gcc&view=rev
Log:
2018-11-01  Paul Thomas  <pault@gcc.gnu.org>

        PR fortran/40196
        * dependency.c (are_identical_variables): Return false if the
        inquiry refs are not the same.
        (gfc_ref_needs_temporary_p): Break on an inquiry ref.
        * dump_parse_tree.c (show_ref): Show the inquiry ref type.
        * expr.c (gfc_free_ref_list): Break on an inquiry ref.
        (gfc_copy_ref): Copy the inquiry ref types.
        (find_inquiry_ref): New function.
        (simplify_const_ref, simplify_ref_chain): Call it. Add new arg
        to simplify_ref_chain.
        (gfc_simplify_expr): Use the new arg in call to
        simplify_ref_chain.
        (gfc_get_full_arrayspec_from_expr, gfc_is_coarray): Break on
        inquiry ref.
        (gfc_traverse_expr): Return true for inquiry ref.
        * frontend-passes.c (gfc_expr_walker): Break on inquiry ref.
        * gfortran.h : Add enums and union member in gfc_ref to
        implement inquiry refs.
        * intrinsic.c : Fix white nois.
        * match.c (gfc_match_assignment): A constant lavlue is an
        error.
        * module.c : Add DECL_MIO_NAME for inquiry_type and the mstring
        for inquiry_types.
        (mio_ref): Handle inquiry refs.
        * primary.c (is_inquiry_ref): New function.
        (gfc_match_varspec): Handle inquiry refs calling new function.
        (gfc_variable_attr): Detect inquiry ref for disambiguation
        with components.
        (caf_variable_attr): Treat inquiry and substring refs in the
        same way.
        * resolve.c (find_array_spec): ditto.
        (gfc_resolve_substring_charlen): If there is neither a charlen
        ref not an inquiry ref, return.
        (resolve_ref): Handle inqiry refs as appropriate.
        (resolve_allocate_expr): Entities with an inquiry ref cannot be
        allocated.
        * simplify.c (simplify_bound, simplify_cobound): Punt on
        inquiry refs.
        * trans-array.c (get_array_ctor_var_strlen): Break on inquiry
        ref.
        *trans-expr.c (conv_inquiry): New function.
        (gfc_conv_variable): Retain the last typespec to pass to
        conv_inquiry on detecting an inquiry ref.


2018-11-01  Paul Thomas  <pault@gcc.gnu.org>

        PR fortran/40196
        * gfortran.dg/inquiry_part_ref_1.f08: New test.
        * gfortran.dg/inquiry_part_ref_2.f90: New test.
        * gfortran.dg/inquiry_part_ref_3.f90: New test.


Added:
    trunk/gcc/testsuite/gfortran.dg/inquiry_type_ref_1.f08
    trunk/gcc/testsuite/gfortran.dg/inquiry_type_ref_2.f90
    trunk/gcc/testsuite/gfortran.dg/inquiry_type_ref_3.f90
    trunk/libgfortran/generated/findloc0_c16.c
    trunk/libgfortran/generated/findloc0_c4.c
    trunk/libgfortran/generated/findloc0_c8.c
    trunk/libgfortran/generated/findloc0_i1.c
    trunk/libgfortran/generated/findloc0_i16.c
    trunk/libgfortran/generated/findloc0_i2.c
    trunk/libgfortran/generated/findloc0_i4.c
    trunk/libgfortran/generated/findloc0_i8.c
    trunk/libgfortran/generated/findloc0_r16.c
    trunk/libgfortran/generated/findloc0_r4.c
    trunk/libgfortran/generated/findloc0_r8.c
    trunk/libgfortran/generated/findloc0_s1.c
    trunk/libgfortran/generated/findloc0_s4.c
    trunk/libgfortran/generated/findloc1_c16.c
    trunk/libgfortran/generated/findloc1_c4.c
    trunk/libgfortran/generated/findloc1_c8.c
    trunk/libgfortran/generated/findloc1_i1.c
    trunk/libgfortran/generated/findloc1_i16.c
    trunk/libgfortran/generated/findloc1_i2.c
    trunk/libgfortran/generated/findloc1_i4.c
    trunk/libgfortran/generated/findloc1_i8.c
    trunk/libgfortran/generated/findloc1_r16.c
    trunk/libgfortran/generated/findloc1_r4.c
    trunk/libgfortran/generated/findloc1_r8.c
    trunk/libgfortran/generated/findloc1_s1.c
    trunk/libgfortran/generated/findloc1_s4.c
    trunk/libgfortran/m4/findloc0.m4
    trunk/libgfortran/m4/findloc0s.m4
    trunk/libgfortran/m4/findloc1.m4
    trunk/libgfortran/m4/findloc1s.m4
    trunk/libgfortran/m4/findloc2s.m4
    trunk/libgfortran/m4/ifindloc0.m4
    trunk/libgfortran/m4/ifindloc1.m4
    trunk/libgfortran/m4/ifindloc2.m4
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/dependency.c
    trunk/gcc/fortran/dump-parse-tree.c
    trunk/gcc/fortran/expr.c
    trunk/gcc/fortran/frontend-passes.c
    trunk/gcc/fortran/gfortran.h
    trunk/gcc/fortran/intrinsic.c
    trunk/gcc/fortran/match.c
    trunk/gcc/fortran/module.c
    trunk/gcc/fortran/primary.c
    trunk/gcc/fortran/resolve.c
    trunk/gcc/fortran/simplify.c
    trunk/gcc/fortran/trans-array.c
    trunk/gcc/fortran/trans-expr.c
    trunk/gcc/testsuite/ChangeLog
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Subject: [Bug fortran/87782] [9 Regression] runtime error: load of value 1818451807, which is not a valid value for type 'expr_t'
Date: Thu, 01 Nov 2018 19:50:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87782

--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Nov  1 19:50:14 2018
New Revision: 265730

URL: https://gcc.gnu.org/viewcvs?rev=265730&root=gcc&view=rev
Log:
2018-11-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

        PR fortran/87782
        * frontend-passes.c (constant_string_length): If there is a
        substring with a length which cannot be reduced to a constant,
        return NULL.


Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/frontend-passes.c
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/87782] [9 Regression] runtime error: load of value 1818451807, which is not a valid value for type 'expr_t'
Date: Thu, 01 Nov 2018 19:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87782

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Fixed on trunk, closing
>From gcc-bugs-return-619941-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 19:51:21 2018
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Subject: [Bug other/63426] [meta-bug] Issues found with -fsanitize=undefined
Date: Thu, 01 Nov 2018 19:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
Bug 63426 depends on bug 87782, which changed state.

Bug 87782 Summary: [9 Regression] runtime error: load of value 1818451807, which is not a valid value for type 'expr_t'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87782

           What    |Removed                     |Added
----------------------------------------------------------------------------
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         Resolution|---                         |FIXED
>From gcc-bugs-return-619943-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 20:13:35 2018
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Subject: [Bug fortran/54613] [F08] Add FINDLOC plus support MAXLOC/MINLOC with KIND=/BACKDate: Thu, 01 Nov 2018 20:13:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54613

--- Comment #20 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Author: tkoenig
Date: Thu Nov  1 20:12:57 2018
New Revision: 265732

URL: https://gcc.gnu.org/viewcvs?rev=265732&root=gcc&view=rev
Log:
2017-11-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

    PR fortran/54613
    * gfortran.dg/findloc_1.f90: Actually commit.
    * gfortran.dg/findloc_2.f90: Actually commit.
    * gfortran.dg/findloc_3.f90: Actually commit.
    * gfortran.dg/findloc_4.f90: Actually commit.
    * gfortran.dg/findloc_5.f90: Actually commit.
    * gfortran.dg/findloc_6.f90: Actually commit.


Added:
    trunk/gcc/testsuite/gfortran.dg/findloc_1.f90
    trunk/gcc/testsuite/gfortran.dg/findloc_2.f90
    trunk/gcc/testsuite/gfortran.dg/findloc_3.f90
    trunk/gcc/testsuite/gfortran.dg/findloc_4.f90
    trunk/gcc/testsuite/gfortran.dg/findloc_5.f90
    trunk/gcc/testsuite/gfortran.dg/findloc_6.f90
    trunk/gcc/testsuite/gfortran.dg/findloc_7.f90
Modified:
    trunk/gcc/testsuite/ChangeLog
>From gcc-bugs-return-619944-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 21:37:59 2018
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From: "felix.von.s at posteo dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/14557] va_list is automatically taken address-of when passed as argument
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=14557

--- Comment #21 from felix <felix.von.s at posteo dot de> ---
> va_list ap2;
> va_copy(ap2, ap);

> and then use &ap2, this always works.

> the proposed macros are both broken and unnecessary.

That's not equivalent. Using va_arg(ap2, T) does not propagate state changes
back to ap, which is the main motivation to form a pointer to ap in the first
place. The macros do that just fine. You mean they are unportable? That part is
true, I admitted as much. Pick your poison.

As for being unnecessary, I vaguely remember gnulib trying to use internal
helper functions with va_list * parameter in their vfprintf implementation. I
cannot find the link now, unfortunately. But there are also duplicates to this
very report, so clearly the need is there.
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Subject: [Bug target/14557] va_list is automatically taken address-of when passed as argument
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=14557

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>From gcc-bugs-return-619946-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 21:49:52 2018
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Subject: [Bug c/87857] New: case label does not reduce to an integer constant
Date: Thu, 01 Nov 2018 21:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87857

            Bug ID: 87857
           Summary: case label does not reduce to an integer constant
           Product: gcc
           Version: 7.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: stsp at users dot sourceforge.net
  Target Milestone: ---

Hello.

The following example:
---
#include <stdint.h>

int foo(uint64_t a)
{
    switch (a) {
    case (1 << 31):
      return 1;
    }
    return 0;
}

int main(int argc, char *argv[])
{
    return foo(argc);
}
---

doesn't compile with -fsanitize=undefined:
---
$ gcc -Wall -fsanitize=undefined lswitch.c 
lswitch.c: In function â€˜fooâ€™:
lswitch.c:6:5: error: case label does not reduce to an integer constant
     case (1 << 31):
---

But if you use g++ or clang with the same
switches, then it compiles fine.
>From gcc-bugs-return-619947-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 21:55:55 2018
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87857

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
1 << 31 is undefined for C99 ...
>From gcc-bugs-return-619948-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 21:58:41 2018
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Subject: [Bug c/87857] case label does not reduce to an integer constant
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--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
1<<31 is undefined in C, but not in C++ (since C++14).
>From gcc-bugs-return-619949-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 22:17:11 2018
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87857

--- Comment #3 from Stas Sergeev <stsp at users dot sourceforge.net> ---
So a clang bug?
I wonder if ubsan is supposed to produce the
compile-time errors, rather than the run-time
warnings. Would it be possible to downgrade
this to a compile-time warning, and/or add a
switch to disable it?
IMHO its absolutely unexpected to get the
compilation failure just because of ubsan.
>From gcc-bugs-return-619951-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 23:13:39 2018
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Subject: [Bug libstdc++/87858] New: Building old multilib bootstrap GCC: stage1 32-bit libstdc++ fails to build after building 64-bit libstdc++
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87858

            Bug ID: 87858
           Summary: Building old multilib bootstrap GCC: stage1 32-bit
                    libstdc++ fails to build after building 64-bit
                    libstdc++
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
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          Assignee: unassigned at gcc dot gnu.org
          Reporter: mkrupcale at matthewkrupcale dot com
  Target Milestone: ---

Created attachment 44944
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44944&action=edit
Makefile.tpl patch portion which allowed me to build GCC 4.8.3 using GCC 8.1

This is related to building multilib bootstrap GCC version 4.8.3 using GCC 8.1.
Particularly, the stage1 host module cc1plus would fail to load libstdc++ after
building the target 64-bit libstdc++ because this was placed in
LD_LIBRARY_PATH, but stage1 cc1plus depends on the newer build libstdc++, and
the older target libstdc++ does not provide the required version definitions.

I suspect this issue is not specific to these versions or even to building old
GCC with new GCC because the stage1 host modules will always depend on the
build libstdc++ and therefore should not try to use the target libstdc++ built
during stage1.

Attached are two patches:

1) gcc48-stage1-build-libstdc++.patch: Makefile.tpl patch portion
which allowed me to build GCC 4.8.3 using GCC 8.1
2) gcc82-stage1-build-libstdc++.patch: analogous patch for GCC 8.2
potentially allowing future GCC to build GCC 8.2 (untested).

What they do is add the target libstdc++ to the target exports LD_LIBRARY_PATH
only after stage1.

Additional information / mailing list patches:

[1] https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00176.html
[2] https://gcc.gnu.org/ml/gcc-patches/2018-10/msg01978.html
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Subject: [Bug middle-end/87852] [9 Regression] FAIL: gcc.c-torture/execute/pr53465.c
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Andrew Pinski <pinskia at gcc dot gnu.org> changed:

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--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed on aarch64 also.
>From gcc-bugs-return-619952-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 01 23:14:56 2018
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Subject: [Bug libstdc++/87858] Building old multilib bootstrap GCC: stage1 32-bit libstdc++ fails to build after building 64-bit libstdc++
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--- Comment #1 from Matthew Krupcale <mkrupcale at matthewkrupcale dot com> ---
Created attachment 44945
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44945&action=edit
analogous patch for GCC 8.2 potentially allowing future GCC to build GCC 8.2
(untested)
>From gcc-bugs-return-619953-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 02 00:18:42 2018
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Subject: [Bug target/85035] nios2: adding -fdelete-null-pointer-checks with -O2 enabled
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sandra at gcc dot gnu.org changed:

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--- Comment #6 from sandra at gcc dot gnu.org ---
I'm marking this issue as resolved since it seems to be fixed on trunk now.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87853

--- Comment #3 from Terry Guo <xuepeng.guo at intel dot com> ---
(In reply to H.J. Lu from comment #2)
> Xuepeng, can you take a look?

OK. Working on it now.
>From gcc-bugs-return-619955-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 02 02:32:14 2018
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Subject: [Bug c++/70380] SFINAE error with constexpr expressions referencing a non-const variable
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70380

Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at gcc dot gnu.org,
                   |                            |nathan at gcc dot gnu.org

--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> ---
cc-ing C++ FE maintainers
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Subject: [Bug target/87079] nios2 optimization for size - case of regression relatively to 5.3.0
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sandra at gcc dot gnu.org changed:

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   Last reconfirmed|                            |2018-11-02
                 CC|                            |sandra at gcc dot gnu.org
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     Ever confirmed|0                           |1

--- Comment #1 from sandra at gcc dot gnu.org ---
This looks like a problem with the nios2 instruction costs.  Things are going
wrong in expand_widening_mult (in expmed.c); compiling with -O2 takes the
expand_binop path at the end to use the provided umulsidi3 expander, but with
-Os it thinks the expand_mult_const path is better.  I'll try to poke at this
some more and come up with a patch.
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Eric Gallager <egallager at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
                 CC|                            |joseph at codesourcery dot com

--- Comment #9 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Eric Gallager from comment #8)
> (In reply to joseph@codesourcery.com from comment #7)
> > As far as I understand the general state of DFP support in GCC: the basic 
> > functionality generally works without needing much maintenance, but no-one 
> > is actively fixing DFP bugs or updating the DFP support for TS 18661-2 / 
> > TS 18661-3, and no-one has ever hooked the DFP support up to the support 
> > for the C front-end to manage excess precision, so that support is only 
> > active for binary floating point.
> 
> So, I guess that's a confirmation.

(was that a correct judgment?)
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Subject: [Bug middle-end/70831] [7/8/9 Regression] FTBFS: Build fails with bootstrap-lto and profiledbootstrap
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Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |egallager at gcc dot gnu.org
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=62077,
                   |                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=69791

--- Comment #17 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Jeffrey A. Law from comment #15)
> Given this is a bug in CHKP/MPX and MPX is being deprecated, I'm moving this
> to P4.

They've been removed entirely now, not just deprecated, so does this need to
stay open?

(In reply to Jeff Bai from comment #3)
> (In reply to Richard Biener from comment #2)
> > You'll eventually run into PR60277 as well.  Probably requires
> > --enable-checking=release to trigger.
> 
> I do apologize for my limited knowledge, but what is the relevance in this
> report with that?

I think Richard transposed the '0' and the '2' in that bug number and actually
meant bug 62077 instead.
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Subject: [Bug other/80437] large decimal numbers in diagnostics are hard to read
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80437

--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #6)
> (In reply to David Malcolm from comment #4)
> > If the warning is based of a const, maybe lead with that e.g. in the 2nd
> > place here:
> > 
> > bug.c:11:5: warning: 'memset': specified size 18446744073709551611 (aka
> > 0xffff_ffff_ffff_fffb, 1<<64 - 5, SOME_CONST) exceeds maximum object size
> > PTRDIFF_MAX (aka 9223372036854775807, 0x7fff_ffff_ffff_ffff, 1<<63 - 1)
> 
> Please keep it simple and don't over-engineer.
> Printing all four variants looks like overkill to me.
> 
> I would simply use decimals up to a certain cut-off and hex numbers
> (without underscores) above it.

Yeah that sounds good to me too.
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Subject: [Bug c++/80744] Detect Possible Division By Zero and give a warning in C/C++ [-Wmaybe-div-by-zero]
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Eric Gallager <egallager at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |87403
            Summary|Detect Divide By Zero and   |Detect Possible Division By
                   |give a warning in  C/C++    |Zero and give a warning in
                   |                            |C/C++ [-Wmaybe-div-by-zero]

--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #3)
> I agree that diagnosing (A) or (C) under -Wdiv-by-zero would not be
> appropriate because the option controls compile-time division by zero and
> there is none here.
> 
> Extending -Wdiv-by-zero to diagnose possible division by zero would
> undoubtedly make the option exceedingly noisy.  Introducing a new option
> such as -Wmaybe-div-by-zero analogous to -Wmaybe-uninitialized would be fine
> but the option wouldn't diagnose ether (A) or (C) because there is no
> evidence of overflow.  -Wmaybe-uninitialized triggers under very restrictive
> conditions, when there is some evidence that an uninitialized variable is
> used.  To avoid excessive noise from -Wmaybe-div-by-zero some similar
> approach would need to used.  Such as:
> 
>   int f (int i)
>   {
>     int j;
> 
>     if (i == 0)     // because of this test
>       j = 7;
>     else
>       j = 13;
> 
>     return j / i;   // i may be assumed to be zero here
>   }

Changing title then to specify -Wmaybe-div-by-zero would be a different
warning, which lets it block the new-warning meta-bug


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] [Meta-bug] Issues that suggest a new warning
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Subject: [Bug target/87853] _mm_cmpgt_epi8 broken with -funsigned-char
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--- Comment #4 from Terry Guo <xuepeng.guo at intel dot com> ---
Thanks Derek for reporting. I can reproduce what Derek described and do think
this is a bug.

_mm_cmpgt_epi8 (__m128i __A, __m128i __B)
{
  return (__m128i) ((__v16qi)__A > (__v16qi)__B);
}

This one performs signed comparison. But the below definition of __v16qi could
be signed char by default or implicitly changed to be unsigned char with option
-funsigned-char.

typedef char __v16qi __attribute__ ((__vector_size__ (16)));

We may need a new definition in gcc like:

typedef signed char __v16qs __attribute__ ((__vector_size__ (16)));

I will sort out a patch to test this idea.
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Subject: [Bug target/71991] Inconsistency for __attribute__ ((__always_inline__)) among LTO and non-LTO compilation
Date: Fri, 02 Nov 2018 07:51:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71991

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #15 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Let's close this as we're not planning to backport that.
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Subject: [Bug c/78987] Wrong location of a binary expression for -Waddress
Date: Fri, 02 Nov 2018 07:52:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78987

--- Comment #3 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
David will you be interested in the PR?
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Subject: [Bug c++/78988] Wrong location of a binary expression for -Waddress
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78988

--- Comment #2 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
David will you be interested in the PR?
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Subject: [Bug tree-optimization/87776] [9 Regression] Compile time hog during RPO VN
Date: Fri, 02 Nov 2018 07:54:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87776

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Nov  2 07:53:48 2018
New Revision: 265739

URL: https://gcc.gnu.org/viewcvs?rev=265739&root=gcc&view=rev
Log:
2018-11-02  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/87776
        * tree-ssa-sccvn.c (do_rpo_vn): Do not mark backedges
        executable when iterating but running into rpo-vn-max-loop-depth
        and not eliding the iteration.

        * gcc.dg/torture/pr87776.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr87776.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c
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Subject: [Bug middle-end/87766] [9 Regression] ICE using __PRETTY_FUNCTION__ in dependent context
Date: Fri, 02 Nov 2018 07:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87766

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

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                 CC|                            |marxin at gcc dot gnu.org
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--- Comment #3 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Fixed on trunk with r265711.
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Subject: [Bug tree-optimization/83352] Missed optimization in math expression: sqrt(sqrt(a)) == pow(a, 1/4)
Date: Fri, 02 Nov 2018 08:30:00 -0000
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's first canonicalized to

  <bb 2> [local count: 1073741824]:
  _4 = ABS_EXPR <a_1(D)>;
  _2 = __builtin_pow (_4, 3.125e-2);

and then expanded again to

  <bb 2> [local count: 1073741824]:
  _4 = ABS_EXPR <a_1(D)>;
  powroot_5 = __builtin_sqrt (_4);
  powroot_6 = __builtin_sqrt (powroot_5);
  powroot_7 = __builtin_sqrt (powroot_6);
  powroot_8 = __builtin_sqrt (powroot_7);
  powroot_9 = __builtin_sqrt (powroot_8);

with -Os you get the library call.

  /* Attempt to expand the POW as a product of square root chains.
     Expand the 0.25 case even when otpimising for size.  */
  if (flag_unsafe_math_optimizations
      && sqrtfn
      && hw_sqrt_exists
      && (speed_p || real_equal (&c, &dconst1_4))
      && !HONOR_SIGNED_ZEROS (mode))
    { 
      unsigned int max_depth = speed_p
                                ? PARAM_VALUE (PARAM_MAX_POW_SQRT_DEPTH)
                                : 2;

      tree expand_with_sqrts
        = expand_pow_as_sqrts (gsi, loc, arg0, arg1, max_depth);

      if (expand_with_sqrts)
        return expand_with_sqrts;  
    }

limited by --param max-pow-sqrt-depth (the limit is 5 by default).
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Subject: [Bug d/87827] libgphobos.spec in the wrong place with --enable-version-specific-runtime-libs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87827

--- Comment #2 from ibuclaw at gcc dot gnu.org ---
Author: ibuclaw
Date: Fri Nov  2 08:29:50 2018
New Revision: 265742

URL: https://gcc.gnu.org/viewcvs?rev=265742&root=gcc&view=rev
Log:
Fix libgphobos.spec in the wrong place with
--enable-version-specific-runtime-libs

libphobos/ChangeLog:

2018-11-01  Iain Buclaw  <ibuclaw@gdcproject.org>

        PR d/87827
        * Makefile.in: Rebuild.
        * configure: Rebuild.
        * configure.ac: Properly set MULTISUBDIR.
        * d_rules.am: Set toolexecdir and toolexeclibdir.
        * libdruntime/Makefile.in: Rebuild.
        * m4/druntime.m4 (DRUNTIME_INSTALL_DIRECTORIES): Add
        --enable-version-specific-runtime-libs.
        * src/Makefile.in: Rebuild.
        * testsuite/Makefile.in: Rebuild.

Modified:
    trunk/libphobos/ChangeLog
    trunk/libphobos/Makefile.in
    trunk/libphobos/configure
    trunk/libphobos/configure.ac
    trunk/libphobos/d_rules.am
    trunk/libphobos/libdruntime/Makefile.in
    trunk/libphobos/m4/druntime.m4
    trunk/libphobos/src/Makefile.in
    trunk/libphobos/testsuite/Makefile.in
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Subject: [Bug tree-optimization/83353] Missed optimization in math expression: sin(asin(a)) == a
Date: Fri, 02 Nov 2018 08:31:00 -0000
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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
So asin(sin(a)) would be a no-brainer but sin(asin(a)) needs to handle a being
outside of [-1,1].
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Subject: [Bug tree-optimization/83348] Missed optimization in math expression: can be used std::pow function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83348

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Well, as said in the comment there's room for improvements.
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Subject: [Bug sanitizer/87837] [8/9 Regression] -O2 -fsanitize=signed-integer-overflow misses overflows on x86-64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87837

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Just have to repeat that I very much dislike TYPE_OVERFLOW_SANITIZED being
sprinkled all over the place...  just instrument before folding things?
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Subject: [Bug sanitizer/87837] [8/9 Regression] -O2 -fsanitize=signed-integer-overflow misses overflows on x86-64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87837

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
That is unfortunately too hard, because there are just too many places where
the FEs can construct these.
That said, having one macro like TYPE_OVERFLOW_UNDEFINED that would combine
that and !TYPE_OVERFLOW_SANITIZED for that type might make things easier.
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Subject: [Bug tree-optimization/87859] New: [8/9 Regression] store-merging miscompilation of mesa
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87859

            Bug ID: 87859
           Summary: [8/9 Regression] store-merging miscompilation of mesa
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
  Target Milestone: ---

struct S {
  union F {
    struct T {
#define A(n) unsigned n:1;
#define B(n) A(n##0) A(n##1) A(n##2) A(n##3) A(n##4) \
             A(n##5) A(n##6) A(n##7) A(n##8) A(n##9)
      B(f) B(f1) B(f2) B(f3) B(f4) B(f5)
      A(f60) A(f61) A(f62) A(f63) A(f64) A(f65) A(f66)
    } q;
    unsigned int i[3];
  } f;
};

struct S s = {
  .f.q.f0 = 1, .f.q.f1 = 1, .f.q.f2 = 1, .f.q.f5 = 1, .f.q.f6 = 1,
  .f.q.f7 = 1, .f.q.f8 = 1, .f.q.f9 = 1, .f.q.f13 = 1, .f.q.f14 = 1,
  .f.q.f15 = 1, .f.q.f16 = 1, .f.q.f17 = 1, .f.q.f19 = 1, .f.q.f21 = 1,
  .f.q.f66 = 1
};

__attribute__((noipa)) void
bar (unsigned *x)
{
  if (x[0] != s.f.i[0] || x[1] != s.f.i[1] || x[2] != s.f.i[2])
    __builtin_abort ();
}

__attribute__((noipa)) void
foo (unsigned char *state)
{
  struct S i;
  i.f.i[0] = 0;
  i.f.i[1] = 0;
  i.f.i[2] = 0;
  i.f.q.f7 = 1;
  i.f.q.f2 = 1;
  i.f.q.f21 = 1;
  i.f.q.f19 = 1;
  i.f.q.f14 = 1;
  i.f.q.f5 = 1;
  i.f.q.f0 = 1;
  i.f.q.f15 = 1;
  i.f.q.f16 = 1;
  i.f.q.f6 = 1;
  i.f.q.f9 = 1;
  i.f.q.f17 = 1;
  i.f.q.f1 = 1;
  i.f.q.f8 = 1;
  i.f.q.f13 = 1;
  i.f.q.f66 = 1;
  if (*state)
    {
      i.f.q.f37 = 1;
      i.f.q.f38 = 1;
      i.f.q.f39 = 1;
      i.f.q.f40 = 1;
      i.f.q.f41 = 1;
      i.f.q.f36 = 1;
    }
  bar (i.f.i);
}

int
main ()
{
  unsigned char z = 0;
  foo (&z);
  return 0;
}

started failing with r264232.
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Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |8.3
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Subject: [Bug sanitizer/87837] [8/9 Regression] -O2 -fsanitize=signed-integer-overflow misses overflows on x86-64
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87837

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #7)
> That is unfortunately too hard, because there are just too many places where
> the FEs can construct these.
> That said, having one macro like TYPE_OVERFLOW_UNDEFINED that would combine
> that and !TYPE_OVERFLOW_SANITIZED for that type might make things easier.

But then we go back to that tri-state of -fno-strict-overflow we had before...

Thus, !TYPE_OVERFLOW_UNDEFINED doesn't imply TYPE_OVERFLOW_WRAPS (ok, -ftrapv
"breaks" that as well, but -ftrapv should instrument ops IMHO and in reality
we need some IL representation of UNDEFINED vs. WRAPS as well).
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Subject: [Bug middle-end/87836] ICE in cc1 for gcc-6.5.0 with SPARC hardware
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Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |sparc
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2018-11-02
          Component|c                           |middle-end
      Known to work|                            |4.9.4
            Version|6.4.0                       |7.3.0
     Ever confirmed|0                           |1
      Known to fail|                            |7.3.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note GCC 6 is no longer supported.  Can you inspect with gdb and see if this is
an unaligned access?
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug tree-optimization/87776] [9 Regression] Compile time hog during RPO VN
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug sanitizer/87860] New: [9 Regression] libsanitizer build fails on sparc64-linux-gnu
Date: Fri, 02 Nov 2018 09:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87860

            Bug ID: 87860
           Summary: [9 Regression] libsanitizer build fails on
                    sparc64-linux-gnu
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxin at gcc dot gnu.org
  Target Milestone: ---

Error message:

libtool: compile: 
/home/marxin/Programming/gcc/gcc-9.0.0+r265711/objdir/./gcc/xgcc -shared-libgcc
-B/home/marxin/Programming/gcc/gcc-9.0.0+r265711/objdir/./gcc -nostdinc++
-L/home/marxin/Programming/gcc/gcc-9.0.0+r265711/objdir/sparc64-unknown-linux-gnu/libstdc++-v3/src
-L/home/marxin/Programming/gcc/gcc-9.0.0+r265711/objdir/sparc64-unknown-linux-gnu/libstdc++-v3/src/.libs
-L/home/marxin/Programming/gcc/gcc-9.0.0+r265711/objdir/sparc64-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/usr/local/sparc64-unknown-linux-gnu/bin/
-B/usr/local/sparc64-unknown-linux-gnu/lib/ -isystem
/usr/local/sparc64-unknown-linux-gnu/include -isystem
/usr/local/sparc64-unknown-linux-gnu/sys-include -D_GNU_SOURCE -D_DEBUG
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-DHAVE_RPC_XDR_H=1 -DHAVE_TIRPC_RPC_XDR_H=0 -I.
-I../../../../libsanitizer/sanitizer_common -I.. -I
../../../../libsanitizer/include -isystem
../../../../libsanitizer/include/system -Wall -W -Wno-unused-parameter
-Wwrite-strings -pedantic -Wno-long-long -fPIC -fno-builtin -fno-exceptions
-fno-rtti -fomit-frame-pointer -funwind-tables -fvisibility=hidden
-Wno-variadic-macros -I../../libstdc++-v3/include
-I../../libstdc++-v3/include/sparc64-unknown-linux-gnu
-I../../../../libsanitizer/../libstdc++-v3/libsupc++ -std=gnu++11
-DSANITIZER_LIBBACKTRACE -DSANITIZER_CP_DEMANGLE -I
../../../../libsanitizer/../libbacktrace -I ../libbacktrace -I
../../../../libsanitizer/../include -include
../../../../libsanitizer/libbacktrace/backtrace-rename.h -g -O2 -D_GNU_SOURCE
-MT sanitizer_linux.lo -MD -MP -MF .deps/sanitizer_linux.Tpo -c
../../../../libsanitizer/sanitizer_common/sanitizer_linux.cc  -fPIC -DPIC -o
.libs/sanitizer_linux.o
../../../../libsanitizer/sanitizer_common/sanitizer_linux.cc: In function
â€˜void* __sanitizer::internal_start_thread(void (*)(void*), void*)â€™:
../../../../libsanitizer/sanitizer_common/sanitizer_linux.cc:1733:58: warning:
cast between incompatible function types from â€˜void (*)(void*)â€™ to â€˜void*
(*)(void*)â€™ [-Wcast-function-type]
 1733 |   real_pthread_create(&th, nullptr, (void*(*)(void *arg))func, arg);
      |                                                          ^~~~
../../../../libsanitizer/sanitizer_common/sanitizer_linux.cc: In function â€˜void
__sanitizer::GetPcSpBp(void*, __sanitizer::uptr*, __sanitizer::uptr*,
__sanitizer::uptr*)â€™:
../../../../libsanitizer/sanitizer_common/sanitizer_linux.cc:1962:31: error:
â€˜struct mcontext_tâ€™ has no member named â€˜gregsâ€™; did you mean â€˜mc_gregsâ€™?
 1962 |   *pc = ucontext->uc_mcontext.gregs[REG_PC];
      |                               ^~~~~
      |                               mc_gregs
../../../../libsanitizer/sanitizer_common/sanitizer_linux.cc:1963:31: error:
â€˜struct mcontext_tâ€™ has no member named â€˜gregsâ€™; did you mean â€˜mc_gregsâ€™?
 1963 |   *sp = ucontext->uc_mcontext.gregs[REG_O6];
      |                               ^~~~~
      |                               mc_gregs
make[4]: *** [Makefile:663: sanitizer_linux.lo] Error 1

It comes from libsanitizer merge. I have a patch for it.
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Subject: [Bug sanitizer/87860] [9 Regression] libsanitizer build fails on sparc64-linux-gnu
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87860

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

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Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
If we have less MEM_REFs then we probably strip them because we think they
reference equal types.

I think I already told you that given that MEM_REFs use pointer types
to carry alignment info _those_ may not become incomplete!  But I didn't
expect that to cause wrong-code but missed optimizations.
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Subject: [Bug tree-optimization/87848] [9 Regression] internal compiler error: in compare_range_with_value, at vr-values.c:1665
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Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
                 CC|                            |aldyh at gcc dot gnu.org
   Target Milestone|---                         |9.0
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Subject: [Bug tree-optimization/87849] Missed optimization: useless for-loop must be eliminated
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Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-11-02
                 CC|                            |matz at gcc dot gnu.org
          Component|c++                         |tree-optimization
            Version|tree-ssa                    |9.0
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  I think the only realistic way to prove this is to fuse the loops
and then see

 l = max(min(l, x), x);

Thus - loop fusion required.
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Subject: [Bug sanitizer/87860] [9 Regression] libsanitizer build fails on sparc64-linux-gnu
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87860

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |https://reviews.llvm.org/D5
                   |                            |4030

--- Comment #1 from Martin LiÅ¡ka <marxin at gcc dot gnu.org> ---
Patch candidate has been sent to upstream of libsanitizer:
https://reviews.llvm.org/D54030
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Subject: [Bug c++/81486] Class template argument deduction fails with (), succeeds with {}
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81486

Ted Lyngmo <ted at lyncon dot se> changed:

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                 CC|                            |ted at lyncon dot se

--- Comment #3 from Ted Lyngmo <ted at lyncon dot se> ---
A comparison between g++ 8.2 and clang++ 6.0.1

g++ -fsanitize=undefined -std=c++17 -Wall -Wextra -Wshadow -Weffc++ -pedantic
-pedantic-errors -Wc++14-compat -Wc++17-compat -c test.cpp
clang++ -fsanitize=undefined -std=c++17 -Wall -Wextra -Wshadow -Weffc++
-pedantic -pedantic-errors -Wc++14-compat -Wc++17-compat -c test.cpp

#include <functional>

std::less lt_g;
std::greater gt_g;
// ok in g++ 8.2
// clang++ 6.0.1:
//  error: declaration of variable 'lt' with deduced type 'std::less' requires
an initializer
//  error: declaration of variable 'gt' with deduced type 'std::greater'
requires an initializer

auto lt_c = std::less();
auto gt_c = std::greater();
// ok in clang++ 6.0.1
// g++ 8.2:
//  error: cannot deduce template arguments for â€˜lessâ€™ from ()
//  error: cannot deduce template arguments for â€˜greaterâ€™ from ()

auto lt_b = std::less{};
auto gt_b = std::greater{};
// ok in both
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Subject: [Bug middle-end/64928] [7/8/9 Regression] Inordinate cpu time and memory usage in "phase opt and generate" with -ftest-coverage -fprofile-arcs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64928

--- Comment #27 from Richard Biener <rguenth at gcc dot gnu.org> ---
Btw, on trunk for the small testcase the main peak memory user is

Bitmaps                                                 Leak            Peak   
        Times  N searches Search iter      Type
--------------------------------------------------------------------------------------------------------------------------------------------
...
tree-ssa-live.c:931 (new_tree_live_info)         4089900520: 42.6%4089900600
102257849: 11.3%       35539       42909      heap
tree-ssa-live.c:932 (new_tree_live_info)         4099840160: 42.7%4099840200
103153730: 11.4%      326917       98706      heap
--------------------------------------------------------------------------------------------------------------------------------------------
Total                                            9592285400                 
906070505

that's livein/liveout.  SSA conflicts are probably similar but harder
to decipher from the stats:

tree-ssa-coalesce.c:586 (ssa_conflicts_add_one)       43056:  0.0%    198672   
398160:  0.0%       19205       39415      heap

next top is

df-problems.c:4400 (df_md_alloc)                  218129480:  2.3% 218146320  
5654706:  0.6%       71264      127594      heap
df-problems.c:4401 (df_md_alloc)                  218142960:  2.3% 218159920  
5640467:  0.6%       71675      127395      heap
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Subject: [Bug middle-end/87852] [9 Regression] FAIL: gcc.c-torture/execute/pr53465.c
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--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I will investigate.
>From gcc-bugs-return-619989-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 02 09:43:42 2018
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Subject: [Bug middle-end/87854] [9 Regression] gcc.c-torture/compile/pr46534.c ICE for 16-bit size_t
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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>From gcc-bugs-return-619990-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 02 09:51:11 2018
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87857

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The reason you get an error is that the expression isn't constant, because it
needs to emit the runtime diagnostics.  Just fix the bug and get away with
that?  1U<<31 will do.
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Subject: [Bug libstdc++/87855] std::optional<T> only copy-constructible if T is trivially copy-constructible
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87855

--- Comment #2 from fiesh at zefix dot tv ---
This fixes the problem.  Thank you so much for your effort!
>From gcc-bugs-return-619992-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 02 10:16:50 2018
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Subject: [Bug libstdc++/87855] std::optional<T> only copy-constructible if T is trivially copy-constructible
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--- Comment #3 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
The fix is not quite right. I'll do a more intrusive one. Stay tuned.
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--- Comment #4 from fiesh at zefix dot tv ---
Heh ok, you tricked me ;)
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Subject: [Bug c++/70380] SFINAE error with constexpr expressions referencing a non-const variable
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--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Both Clang and EDG also reject the same two statements.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87678

--- Comment #3 from UroÅ¡ Bizjak <ubizjak at gmail dot com> ---
Another similar problem:

__m128
bar (__m128 x)
{
  return x + _mm_set1_ps (2.3f);
}

gcc -O2 -msse2 creates following _combine dump:

--cut here--
Trying 6 -> 7:
    6: r85:V4SF=[`*.LC0']
      REG_EQUAL const_vector
    7: r84:V4SF=r86:V4SF+r85:V4SF
      REG_DEAD r86:V4SF
      REG_DEAD r85:V4SF
Failed to match this instruction:
(set (reg:V4SF 84)
    (plus:V4SF (reg:V4SF 86)
        (const_vector:V4SF [
                (const_double:SF 2.2999999523162841796875e+0 [0x0.933333p+2])
repeated x4
            ])))

Trying 6 -> 7:
    6: r85:V4SF=const_vector
      REG_EQUAL const_vector
    7: r84:V4SF=r86:V4SF+r85:V4SF
      REG_DEAD r86:V4SF
      REG_DEAD r85:V4SF
Failed to match this instruction:
(set (reg:V4SF 84)
    (plus:V4SF (reg:V4SF 86)
        (const_vector:V4SF [
                (const_double:SF 2.2999999523162841796875e+0 [0x0.933333p+2])
repeated x4
            ])))
--cut here--

Please note that the compiler tries to combine insns twice, once with:

    6: r85:V4SF=[`*.LC0']
      REG_EQUAL const_vector

and the second time with:

    6: r85:V4SF=const_vector
      REG_EQUAL const_vector

However, memory operand is never propagated, although the pattern would accept
one.
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Subject: [Bug c++/87861] New: [9 regression] ICE in output_constructor_regular_field, at varasm.c:5165
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87861

            Bug ID: 87861
           Summary: [9 regression] ICE in
                    output_constructor_regular_field, at varasm.c:5165
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: build, ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: polacek at redhat dot com
  Target Milestone: ---
            Target: ia64-*-*

libtool: compile:  /usr/local/gcc/gcc-20180919/Build/./gcc/xgcc -shared-libgcc
-B/usr/local/gcc/gcc-20180919/Build/./gcc -nostdinc++
-L/usr/local/gcc/gcc-20180919/Build/ia64-suse-linux/libstdc++-v3/src
-L/usr/local/gcc/gcc-20180919/Build/ia64-suse-linux/libstdc++-v3/src/.libs
-L/usr/local/gcc/gcc-20180919/Build/ia64-suse-linux/libstdc++-v3/libsupc++/.libs
-B/usr/ia64-suse-linux/bin/ -B/usr/ia64-suse-linux/lib/ -isystem
/usr/ia64-suse-linux/include -isystem /usr/ia64-suse-linux/sys-include
-fno-checking -I/usr/local/gcc/gcc-20180919/libstdc++-v3/../libgcc
-I/usr/local/gcc/gcc-20180919/Build/ia64-suse-linux/libstdc++-v3/include/ia64-suse-linux
-I/usr/local/gcc/gcc-20180919/Build/ia64-suse-linux/libstdc++-v3/include
-I/usr/local/gcc/gcc-20180919/libstdc++-v3/libsupc++ -D_GLIBCXX_SHARED
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi=2
-fdiagnostics-show-location=once -ffunction-sections -fdata-sections
-frandom-seed=bad_typeid.lo -O2 -g -D_GNU_SOURCE -c
../../../../libstdc++-v3/libsupc++/bad_typeid.cc  -fPIC -DPIC -D_GLIBCXX_SHARED
-o bad_typeid.o
../../../../libstdc++-v3/libsupc++/bad_typeid.cc:36:1: internal compiler error:
in output_constructor_regular_field, at varasm.c:5165
36 | } // namespace std
   | ^
0x400000000176abaf output_constructor_regular_field
        ../../gcc/varasm.c:5165
0x400000000176d09f output_constructor
        ../../gcc/varasm.c:5475
0x400000000176940f output_constant
        ../../gcc/varasm.c:4967
0x400000000175414f assemble_variable_contents
        ../../gcc/varasm.c:2143
0x400000000175586f assemble_variable(tree_node*, int, int, int)
        ../../gcc/varasm.c:2319
0x40000000017a564f varpool_node::assemble_decl()
        ../../gcc/varpool.c:586
0x40000000017a74cf symbol_table::output_variables()
        ../../gcc/varpool.c:752
0x40000000007b806f symbol_table::compile()
        ../../gcc/cgraphunit.c:2611
0x40000000007bd8ef symbol_table::compile()
        ../../gcc/cgraphunit.c:2791
0x40000000007bd8ef symbol_table::finalize_compilation_unit()
        ../../gcc/cgraphunit.c:2788

(gdb) up
#1  0x400000000176abb0 in output_constructor_regular_field (
    local=0x600ffffffffee920) at ../../gcc/varasm.c:5165
5165            gcc_assert (fieldpos == local->total_bytes);
(gdb) p fieldpos
$1 = 16
(gdb) p local->total_bytes
$2 = 24
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Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ebotcazou at gcc dot gnu.org,
                   |                            |jakub at gcc dot gnu.org

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
So we have, after inserting the backedge copy

  <bb 3> [local count: 1034442873]:
  # c_22 = PHI <c_10(D)(2), d_14(6)>
  c_2 = c_22;
  d_14 = MEM[base: x_12(D), index: _9, step: 4, offset: 0B];
  if (d_14 == 0)
    goto <bb 7>; [3.66%]
  else
    goto <bb 4>; [96.34%]

  <bb 4> [local count: 996582264]:
  _4 = b_21 != 0;
  _5 = d_14 <= c_2;
  _6 = _4 & _5;
  if (_6 != 0)

and we coalesce c_22 and d_14 (as desired).

But then somehow fwprop comes along and changes

(insn 14 13 15 4 (set (reg/v:SI 83 [ c ])
        (reg/v:SI 88 [ d ])) 67 {*movsi_internal}
     (nil))
(insn 15 14 16 4 (set (reg/v:SI 88 [ d ])
        (mem:SI (plus:SI (mult:SI (reg/v:SI 89 [ i ])
                    (const_int 4 [0x4]))
                (reg/v/f:SI 90 [ x ])) [0 MEM[base: x_12(D), index: _9, step:
4, offset: 0B]+0 S4 A32]))
"/space/rguenther/src/gcc-slpcost/gcc/testsuite/gcc.c-torture/execute/pr53465.c":15:11
67 {*movsi_internal}
     (nil))
...
(insn 23 42 24 6 (set (reg:CCGC 17 flags)
        (compare:CCGC (reg/v:SI 88 [ d ])
            (reg/v:SI 83 [ c ])))
"/space/rguenther/src/gcc-slpcost/gcc/testsuite/gcc.c-torture/execute/pr53465.c":18:18
11 {*cmpsi_1}
     (nil))


In insn 23, replacing
 (compare:CCGC (reg/v:SI 88 [ d ])
        (reg/v:SI 83 [ c ]))
 with (compare:CCGC (reg/v:SI 88 [ d ])
        (reg/v:SI 88 [ d ]))

it looks like it forwards the copy in insn 14 across the setter of 88 in insn
15!?  Note that 88 is initially undefined!

In fwprop use_killed_between returns false because of the following which
is of course bogus if you consider backedges and coalescing with
uninitialized regs.  That is, what applies to hard regs also applies
to regs that are used uninitialized.

  /* Check if the reg in USE has only one definition.  We already
     know that this definition reaches use, or we wouldn't be here.
     However, this is invalid for hard registers because if they are
     live at the beginning of the function it does not mean that we
     have an uninitialized access.  */
  regno = DF_REF_REGNO (use);
  def = DF_REG_DEF_CHAIN (regno);
  if (def
      && DF_REF_NEXT_REG (def) == NULL
      && regno >= FIRST_PSEUDO_REGISTER)
    return false;

So maybe this is what triggers the issue - the copy that is inserted
references an uninitialized value (well, on SSA the PHI node constitutes
a copy from that uninit value already).

Eric, you added partitions_for_undefined_values and IIRC that was just narrow
scope enough to fix a specific issue but not generally address shortcomings
within RTL?
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Subject: [Bug sanitizer/87857] case label does not reduce to an integer constant
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87857

--- Comment #5 from Stas Sergeev <stsp at users dot sourceforge.net> ---
(In reply to Jakub Jelinek from comment #4)
> The reason you get an error is that the expression isn't constant, because
> it needs to emit the runtime diagnostics.  Just fix the bug and get away
> with that?  1U<<31 will do.

I of course already "fixed" my code as per
earlier comments here. So you can close this
if you want. But I am sure gcc is not doing
the right thing here. Just make it a warning,
and, more importantly, -W warning, independent
of any -f. Then people will get this warning
with -Wall or whatever, and will not get a
compilation failure with -fsanitize on otherwise
warning-less code.

I am not sure I understand how the run-time
diagnostic makes the expression non-const.
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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                 CC|                            |aoliva at gcc dot gnu.org

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Alex - I belive you relaxed out-of-SSA coalescing of (undefined) default-defs,
so maybe you have an idea/opinion here as well?
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--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
And fwprop before that questionable code does

  /* We used to have a def reaching a use that is _before_ the def,
     with the def not dominating the use even though the use and def
     are in the same basic block, when a register may be used
     uninitialized in a loop.  This should not happen anymore since
     we do not use reaching definitions, but still we test for such
     cases and assume that DEF is not available.  */
  if (def_bb == target_bb
      ? DF_INSN_LUID (def_insn) >= DF_INSN_LUID (target_insn)
      : !dominated_by_p (CDI_DOMINATORS, target_bb, def_bb))
    return true;

so that suggests a fix like the following which fixes the testcase for me

diff --git a/gcc/fwprop.c b/gcc/fwprop.c
index 0fca0f1edbc..cd44c0ef637 100644
--- a/gcc/fwprop.c
+++ b/gcc/fwprop.c
@@ -767,7 +767,11 @@ use_killed_between (df_ref use, rtx_insn *def_insn,
rtx_insn *target_insn)
   def = DF_REG_DEF_CHAIN (regno);
   if (def
       && DF_REF_NEXT_REG (def) == NULL
-      && regno >= FIRST_PSEUDO_REGISTER)
+      && regno >= FIRST_PSEUDO_REGISTER
+      && (BLOCK_FOR_INSN (DF_REF_INSN (def)) == def_bb
+         ? DF_INSN_LUID (DF_REF_INSN (def)) < DF_INSN_LUID (def_insn)
+         : dominated_by_p (CDI_DOMINATORS,
+                           def_bb, BLOCK_FOR_INSN (DF_REF_INSN (def)))))
     return false;

   /* Check locally if we are in the same basic block.  */
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Subject: [Bug tree-optimization/87859] [8/9 Regression] store-merging miscompilation of mesa
Date: Fri, 02 Nov 2018 11:27:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87859

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2018-11-02
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     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, the bug is that in the code introduced in the PR86844 fix, if we skip any
stores because their order was > last_order, we should have marked the
merged_store with some flag that prevents merging that with any further stores.

Plus, there is obviously a missed optimization (and regression on that),
because in this testcase there is no reason why any of the INTEGER_CST stores
should be skipped.

We have stores (bitposition, bitsize):
0 32
0 1
1 1
...
21 1
32 32
64 32
66 1
where 0 32 has order 0, 0 1 has order 9, 1 1 has order 15, 32 32 has order 1,
64 32 has order 2 and 66 1 has the highest order.
All the stores at offsets 0 to 21 are overlapping.  We go and merge as
overlapping store 0 32, 0 1 and all stores with order in between those (but
that means skipping 1 1 and various others).  If we have to do that, e.g.
because the
1 1 store would be not INTEGER_CST store, then we need to arrange not to merge
with it anymore stores with order above that problematic store.
If all the to be skipped stores are INTEGER_CSTs, then we should obviously try
to merge them in all (as was the case before the PR86844 fix on this testcase).
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Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #7 from Jan Hubicka <hubicka at ucw dot cz> ---
> If we have less MEM_REFs then we probably strip them because we think they
> reference equal types.
> 
> I think I already told you that given that MEM_REFs use pointer types
> to carry alignment info _those_ may not become incomplete!  But I didn't
> expect that to cause wrong-code but missed optimizations.

We do not make them incomplete.  The problem actually seems to be in
early optimization where we optimize out the if conditional above.
Not sure why -ffat-lto-objects worked in this context.
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Subject: [Bug target/14557] va_list is automatically taken address-of when passed as argument
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=14557

--- Comment #23 from nsz at gcc dot gnu.org ---
(In reply to felix from comment #21)
> > va_list ap2;
> > va_copy(ap2, ap);
> 
> > and then use &ap2, this always works.
> 
> > the proposed macros are both broken and unnecessary.
> 
> That's not equivalent. Using va_arg(ap2, T) does not propagate state changes
> back to ap, which is the main motivation to form a pointer to ap in the
> first place. The macros do that just fine. You mean they are unportable?
> That part is true, I admitted as much. Pick your poison.
> 

state changes are propagated to ap2, which is
what you should use after you made the copy,
it does exactly what you want.
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Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jan Hubicka from comment #7)
> > If we have less MEM_REFs then we probably strip them because we think they
> > reference equal types.
> > 
> > I think I already told you that given that MEM_REFs use pointer types
> > to carry alignment info _those_ may not become incomplete!  But I didn't
> > expect that to cause wrong-code but missed optimizations.
> 
> We do not make them incomplete.  The problem actually seems to be in
> early optimization where we optimize out the if conditional above.
> Not sure why -ffat-lto-objects worked in this context.

So can you attach preprocessed source for the affected file?  And name the
affected function? (dump is stripped too early)
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Subject: [Bug tree-optimization/87859] [8/9 Regression] store-merging miscompilation of mesa
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
           Keywords|                            |wrong-code
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      Known to fail|                            |8.2.1
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Subject: [Bug sanitizer/87860] [9 Regression] libsanitizer build fails on sparc64-linux-gnu
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug c++/87861] [9 regression] ICE in output_constructor_regular_field, at varasm.c:5165
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Richard Biener <rguenth at gcc dot gnu.org> changed:

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Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #9 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Created attachment 44946
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44946&action=edit
reproducer

I am attaching the preprocessed file and will be away till 2pm.
What seems to be wrong is that we optimize out decrease of n_useless_values in
discard_useless_locs.
fre1 already differs:

 discard_useless_locs (void * * x, void * info)
 {
   struct elt_loc_list * l;
@@ -8886,9 +8895,6 @@
   struct rtx_def * _4;
   int _5;
   struct elt_loc_list * _7;
-  struct elt_loc_list * _8;
-  int n_useless_values.142_9;
-  int _10;
   struct elt_loc_list * _25;
   struct elt_loc_list * empty_elt_loc_lists.98_26;

@@ -8947,27 +8953,6 @@

   <bb 7> :
   # DEBUG BEGIN_STMT
-  if (_1 != 0B)
-    goto <bb 8>; [INV]
-  else
-    goto <bb 10>; [INV]
-
-  <bb 8> :
-  _8 = v_16->locs;
-  if (_8 == 0B)
-    goto <bb 9>; [INV]
-  else
-    goto <bb 10>; [INV]
-
-  <bb 9> :
-  # DEBUG BEGIN_STMT
-  n_useless_values.142_9 = n_useless_values;
-  _10 = n_useless_values.142_9 + 1;
-  n_useless_values = _10;
-  # DEBUG BEGIN_STMT
-  values_became_useless = 1;
-
-  <bb 10> :
   # DEBUG BEGIN_STMT
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25844

--- Comment #21 from simon at pushface dot org ---
This bug was fixed in GCC 5 (5.2.0, x86_64-apple-darwin15) and is still fixed
up to GCC 9.0.0 20180927.
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
Date: Fri, 02 Nov 2018 12:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
I can only see that v->locs might be affected by fld because the type of the
FIELD_DECL changes but the (alias) type of *p_11 remains the same.  Thus
we have get_alias_set (ptr-to-incomplete) and get_alias_set (ptr-to-complete)
not agreeing.  But of course they have to.

I guess we can make a two-unit LTO testcase like the following - but it
doesn't miscompile since we end up substituting the MEM_REF base type
for the store in foo() somehow so even with more fiddling I always get

  *p_5 = &a;
  py ={v} &y;
  _1 ={v} py;
  MEM[(struct Y *)_1].p = &b;
^^^ will not use the alias set of .p

  _2 = *p_5;




struct X;
struct Y { struct X *p; };

void foo (struct Y *p, struct X *v)
{
  p->p = v;
}

---

struct X { int i; };
struct Y { struct X *p; };

void foo (struct Y *, struct X *);
struct X ** volatile px;
struct X a, b;
int main()
{
  struct Y y;
  px = &y.p;
  struct X **p = px; 
  *p = &a;
  foo (&y, &b);
  if (*p != &b)
    __builtin_abort ();
  return 0;
}
>From gcc-bugs-return-620011-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 02 12:54:07 2018
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Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
That said - we used to give all pointer types the same alias-set but you
somehow convinced yourself that not doing that is safe.  Even when considering
pointer-to-complete and pointer-to-incomplete types.  Do you remember any
details?
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Subject: [Bug c++/87862] New: Different behavior with -O2 with template specialization of virtual member function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87862

            Bug ID: 87862
           Summary: Different behavior with -O2 with template
                    specialization of virtual member function
           Product: gcc
           Version: 7.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: john.eric.martin at gmail dot com
  Target Milestone: ---

Created attachment 44947
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44947&action=edit
Test case source and -save-temps output

I admit it's probably not well written code and should be re-factored; however,
there is no error or warning and the compiler is generating undesired behavior
only when optimization (tested with -O3) is turned on.

Since it's related to the optimization path I was weary about combining the
source files. Please pardon the zip file with multiple sources. The zip file
contains the files generated with -save-temps in addition to a Makefile that
builds and runs the optimized and not optimized versions of the test case
demonstrating that they crash and print a number respectively. Output below is
also in the output.txt file in the zip archive.


g++ -v -save-temps -Wall -Wextra -std=c++14 -O3 -o testcase bug.cpp s.cpp m.cpp
b.cpp v.cpp e.cpp k.cpp o.cpp
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.3.0-21ubuntu1~16.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.3.0 (Ubuntu 7.3.0-21ubuntu1~16.04) 
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE bug.cpp -mtune=generic -march=x86-64 -std=c++14
-Wall -Wextra -O3 -fpch-preprocess -fstack-protector-strong -Wformat-security
-o bug.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/7"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/7/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/7
 /usr/include/x86_64-linux-gnu/c++/7
 /usr/include/c++/7/backward
 /usr/lib/gcc/x86_64-linux-gnu/7/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -fpreprocessed bug.ii -quiet -dumpbase
bug.cpp -mtune=generic -march=x86-64 -auxbase bug -O3 -Wall -Wextra -std=c++14
-version -fstack-protector-strong -Wformat-security -o bug.s
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 612ffb48244e46eb953b6d77363adac8
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 as -v --64 -o bug.o bug.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE s.cpp -mtune=generic -march=x86-64 -std=c++14
-Wall -Wextra -O3 -fpch-preprocess -fstack-protector-strong -Wformat-security
-o s.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/7"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/7/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/7
 /usr/include/x86_64-linux-gnu/c++/7
 /usr/include/c++/7/backward
 /usr/lib/gcc/x86_64-linux-gnu/7/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -fpreprocessed s.ii -quiet -dumpbase
s.cpp -mtune=generic -march=x86-64 -auxbase s -O3 -Wall -Wextra -std=c++14
-version -fstack-protector-strong -Wformat-security -o s.s
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 612ffb48244e46eb953b6d77363adac8
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 as -v --64 -o s.o s.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE m.cpp -mtune=generic -march=x86-64 -std=c++14
-Wall -Wextra -O3 -fpch-preprocess -fstack-protector-strong -Wformat-security
-o m.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/7"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/7/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/7
 /usr/include/x86_64-linux-gnu/c++/7
 /usr/include/c++/7/backward
 /usr/lib/gcc/x86_64-linux-gnu/7/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -fpreprocessed m.ii -quiet -dumpbase
m.cpp -mtune=generic -march=x86-64 -auxbase m -O3 -Wall -Wextra -std=c++14
-version -fstack-protector-strong -Wformat-security -o m.s
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 612ffb48244e46eb953b6d77363adac8
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 as -v --64 -o m.o m.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE b.cpp -mtune=generic -march=x86-64 -std=c++14
-Wall -Wextra -O3 -fpch-preprocess -fstack-protector-strong -Wformat-security
-o b.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/7"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/7/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/7
 /usr/include/x86_64-linux-gnu/c++/7
 /usr/include/c++/7/backward
 /usr/lib/gcc/x86_64-linux-gnu/7/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -fpreprocessed b.ii -quiet -dumpbase
b.cpp -mtune=generic -march=x86-64 -auxbase b -O3 -Wall -Wextra -std=c++14
-version -fstack-protector-strong -Wformat-security -o b.s
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 612ffb48244e46eb953b6d77363adac8
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 as -v --64 -o b.o b.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE v.cpp -mtune=generic -march=x86-64 -std=c++14
-Wall -Wextra -O3 -fpch-preprocess -fstack-protector-strong -Wformat-security
-o v.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/7"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/7/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/7
 /usr/include/x86_64-linux-gnu/c++/7
 /usr/include/c++/7/backward
 /usr/lib/gcc/x86_64-linux-gnu/7/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -fpreprocessed v.ii -quiet -dumpbase
v.cpp -mtune=generic -march=x86-64 -auxbase v -O3 -Wall -Wextra -std=c++14
-version -fstack-protector-strong -Wformat-security -o v.s
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 612ffb48244e46eb953b6d77363adac8
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 as -v --64 -o v.o v.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE e.cpp -mtune=generic -march=x86-64 -std=c++14
-Wall -Wextra -O3 -fpch-preprocess -fstack-protector-strong -Wformat-security
-o e.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/7"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/7/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/7
 /usr/include/x86_64-linux-gnu/c++/7
 /usr/include/c++/7/backward
 /usr/lib/gcc/x86_64-linux-gnu/7/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -fpreprocessed e.ii -quiet -dumpbase
e.cpp -mtune=generic -march=x86-64 -auxbase e -O3 -Wall -Wextra -std=c++14
-version -fstack-protector-strong -Wformat-security -o e.s
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 612ffb48244e46eb953b6d77363adac8
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 as -v --64 -o e.o e.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE k.cpp -mtune=generic -march=x86-64 -std=c++14
-Wall -Wextra -O3 -fpch-preprocess -fstack-protector-strong -Wformat-security
-o k.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/7"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/7/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/7
 /usr/include/x86_64-linux-gnu/c++/7
 /usr/include/c++/7/backward
 /usr/lib/gcc/x86_64-linux-gnu/7/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -fpreprocessed k.ii -quiet -dumpbase
k.cpp -mtune=generic -march=x86-64 -auxbase k -O3 -Wall -Wextra -std=c++14
-version -fstack-protector-strong -Wformat-security -o k.s
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 612ffb48244e46eb953b6d77363adac8
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 as -v --64 -o k.o k.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -E -quiet -v -imultiarch
x86_64-linux-gnu -D_GNU_SOURCE o.cpp -mtune=generic -march=x86-64 -std=c++14
-Wall -Wextra -O3 -fpch-preprocess -fstack-protector-strong -Wformat-security
-o o.ii
ignoring duplicate directory "/usr/include/x86_64-linux-gnu/c++/7"
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/7/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/7
 /usr/include/x86_64-linux-gnu/c++/7
 /usr/include/c++/7/backward
 /usr/lib/gcc/x86_64-linux-gnu/7/include
 /usr/local/include
 /usr/lib/gcc/x86_64-linux-gnu/7/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus -fpreprocessed o.ii -quiet -dumpbase
o.cpp -mtune=generic -march=x86-64 -auxbase o -O3 -Wall -Wextra -std=c++14
-version -fstack-protector-strong -Wformat-security -o o.s
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
GNU C++14 (Ubuntu 7.3.0-21ubuntu1~16.04) version 7.3.0 (x86_64-linux-gnu)
        compiled by GNU C version 7.3.0, 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=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 612ffb48244e46eb953b6d77363adac8
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 as -v --64 -o o.o o.s
GNU assembler version 2.26.1 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Ubuntu) 2.26.1
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/7/:/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib/:/lib/x86_64-linux-gnu/:/lib/../lib/:/usr/lib/x86_64-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/x86_64-linux-gnu/7/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
 /usr/lib/gcc/x86_64-linux-gnu/7/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/7/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
-plugin-opt=-fresolution=bug.res -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc --sysroot=/
--build-id --eh-frame-hdr -m elf_x86_64 --hash-style=gnu --as-needed
-dynamic-linker /lib64/ld-linux-x86-64.so.2 -z relro -o testcase
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/crt1.o
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/crti.o
/usr/lib/gcc/x86_64-linux-gnu/7/crtbegin.o -L/usr/lib/gcc/x86_64-linux-gnu/7
-L/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu
-L/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib -L/lib/x86_64-linux-gnu
-L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib
-L/usr/lib/gcc/x86_64-linux-gnu/7/../../.. bug.o s.o m.o b.o v.o e.o k.o o.o
-lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc
/usr/lib/gcc/x86_64-linux-gnu/7/crtend.o
/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/crtn.o
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-Wall' '-Wextra' '-std=c++14' '-O3'
'-o' 'testcase' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
g++ -std=c++14 -o testcase_nopt bug.cpp s.cpp m.cpp b.cpp v.cpp e.cpp k.cpp
o.cpp
./testcase_nopt
1337
./testcase
Makefile:2: recipe for target 'all' failed
make: *** [all] Segmentation fault (core dumped)
>From gcc-bugs-return-620013-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 02 13:03:20 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
Date: Fri, 02 Nov 2018 13:03:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
OK, so in GCC 8 at least pointer-to-incomplete type gets the alias set of void
* and that conflicts with any other pointer.  So that works.

Not sure what breaks here now...
>From gcc-bugs-return-620014-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 02 13:18:42 2018
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
Date: Fri, 02 Nov 2018 13:18:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the alias machinery disambiguates them at

static bool
indirect_refs_may_alias_p (tree ref1 ATTRIBUTE_UNUSED, tree base1,
                           poly_int64 offset1, poly_int64 max_size1,
...
  /* Do type-based disambiguation.  */
  if (base1_alias_set != base2_alias_set
      && !alias_sets_conflict_p (base1_alias_set, base2_alias_set))
    return false;

where base2_alias_set == ref2_alias_set from *p_11 and
ref1_alias_set == ref2_alias_set but base1_alias_set == 22 (from v_16->locs).

And somehow the alias-set for *v_16 doesn't have v_16->locs as child
(well, it probably has the pointer-to-complete one as child since we built
the alias-set for *v_16 _before_ adjusting the FIELD_DECLs type!?)
>From gcc-bugs-return-620015-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 02 13:29:01 2018
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Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
Date: Fri, 02 Nov 2018 13:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
The following does _not_ fix it (but an assert that the alias-set is -1 does
trigger).  We probably have to adjust all types the record parent is embedded
into as well for which there's no easy way.

Well.  Not compute any alias-sets before free-lang-data .... -Wstrict-aliasing
computes it for example, so does folding, for example in make_bit_field_ref
(in fact that seems to be the only caller...).

diff --git a/gcc/tree.c b/gcc/tree.c
index 069d62d51be..47cbbaab9b5 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -5515,7 +5515,10 @@ free_lang_data_in_decl (tree decl, struct
free_lang_data_d *fld)
     }
   else if (TREE_CODE (decl) == FIELD_DECL)
     {
+      tree orig = TREE_TYPE (decl);
       TREE_TYPE (decl) = fld_simplified_type (TREE_TYPE (decl), fld);
+      if (TREE_TYPE (decl) != orig)
+       TYPE_ALIAS_SET (DECL_CONTEXT (decl)) = -1;
       DECL_INITIAL (decl) = NULL_TREE;
     }
   else if (TREE_CODE (decl) == TRANSLATION_UNIT_DECL
>From gcc-bugs-return-620016-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 02 13:29:12 2018
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Subject: [Bug c++/87863] New: c-c++-common/gomp/gridify-{2,3}.c ICE
Date: Fri, 02 Nov 2018 13:29:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87863

            Bug ID: 87863
           Summary: c-c++-common/gomp/gridify-{2,3}.c ICE
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: openmp
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tschwinge at gcc dot gnu.org
                CC: jamborm at gcc dot gnu.org, nathan at gcc dot gnu.org
  Target Milestone: ---

As of r265714 "[ABI PATCH] static anonymous unions of function scope", and with
checking enabled (might be relevant, see "gcc_checking_assert" below), I'm
seeing the following regressions:

    PASS: c-c++-common/gomp/gridify-2.c  -std=gnu++14  scan-tree-dump omplower
"Target construct will be turned into a gridified HSA kernel"
    [-PASS:-]{+FAIL: c-c++-common/gomp/gridify-2.c  -std=gnu++14 (internal
compiler error)+}
    {+FAIL:+} c-c++-common/gomp/gridify-2.c  -std=gnu++14 (test for excess
errors)
    PASS: c-c++-common/gomp/gridify-2.c  -std=gnu++17  scan-tree-dump omplower
"Target construct will be turned into a gridified HSA kernel"
    [-PASS:-]{+FAIL: c-c++-common/gomp/gridify-2.c  -std=gnu++17 (internal
compiler error)+}
    {+FAIL:+} c-c++-common/gomp/gridify-2.c  -std=gnu++17 (test for excess
errors)
    PASS: c-c++-common/gomp/gridify-2.c  -std=gnu++98  scan-tree-dump omplower
"Target construct will be turned into a gridified HSA kernel"
    [-PASS:-]{+FAIL: c-c++-common/gomp/gridify-2.c  -std=gnu++98 (internal
compiler error)+}
    {+FAIL:+} c-c++-common/gomp/gridify-2.c  -std=gnu++98 (test for excess
errors)
    PASS: c-c++-common/gomp/gridify-3.c  -std=gnu++14  scan-tree-dump omplower
"Target construct will be turned into a gridified HSA kernel"
    [-PASS:-]{+FAIL: c-c++-common/gomp/gridify-3.c  -std=gnu++14 (internal
compiler error)+}
    {+FAIL:+} c-c++-common/gomp/gridify-3.c  -std=gnu++14 (test for excess
errors)
    PASS: c-c++-common/gomp/gridify-3.c  -std=gnu++17  scan-tree-dump omplower
"Target construct will be turned into a gridified HSA kernel"
    [-PASS:-]{+FAIL: c-c++-common/gomp/gridify-3.c  -std=gnu++17 (internal
compiler error)+}
    {+FAIL:+} c-c++-common/gomp/gridify-3.c  -std=gnu++17 (test for excess
errors)
    PASS: c-c++-common/gomp/gridify-3.c  -std=gnu++98  scan-tree-dump omplower
"Target construct will be turned into a gridified HSA kernel"
    [-PASS:-]{+FAIL: c-c++-common/gomp/gridify-3.c  -std=gnu++98 (internal
compiler error)+}
    {+FAIL:+} c-c++-common/gomp/gridify-3.c  -std=gnu++98 (test for excess
errors)

    (gdb) bt
    #0  fancy_abort (file=0x1af2e90 "[...]/gcc/cp/mangle.c", line=1925,
function=0x1af3970 <discriminator_for_local_entity(tree_node*)::__FUNCTION__>
"discriminator_for_local_entity") at [...]/gcc/diagnostic.c:1560
    #1  0x00000000007c8ac1 in discriminator_for_local_entity
(entity=entity@entry=0x7ffff6934ea0) at [...]/gcc/cp/mangle.c:1925
    #2  0x00000000007d04eb in write_local_name (entity=0x7ffff6934ea0,
local_entity=0x7ffff6934ea0, function=<optimized out>) at
[...]/gcc/cp/mangle.c:2035
    #3  write_name (decl=decl@entry=0x7ffff6934ea0,
ignore_local_scope=ignore_local_scope@entry=0) at [...]/gcc/cp/mangle.c:963
    #4  0x00000000007d4c8a in write_encoding (decl=0x7ffff6934ea0) at
[...]/gcc/cp/mangle.c:824
    #5  0x00000000007d6ab0 in mangle_decl_string
(decl=decl@entry=0x7ffff6934ea0) at [...]/gcc/cp/mangle.c:3765
    #6  0x00000000007d6cf9 in get_mangled_id (decl=0x7ffff6934ea0) at
[...]/gcc/cp/mangle.c:3787
    #7  mangle_decl (decl=0x7ffff6934ea0) at [...]/gcc/cp/mangle.c:3825
    #8  0x00000000011f6616 in decl_assembler_name (decl=0x7ffff6934ea0) at
[...]/gcc/tree.c:691
    #9  0x0000000000a430fd in symbol_table::insert_to_assembler_name_hash
(this=0x7ffff67ac100, node=0x7ffff6933e00, with_clones=<optimized out>) at
[...]/gcc/symtab.c:174
    #10 0x0000000000a45495 in symbol_table::symtab_initialize_asm_name_hash
(this=0x7ffff67ac100) at [...]/gcc/symtab.c:266
    #11 0x0000000000a454d5 in symbol_table::symtab_initialize_asm_name_hash
(this=<optimized out>) at [...]/gcc/symtab.c:262
    #12 0x0000000000a5d6c3 in analyze_functions
(first_time=first_time@entry=true) at [...]/gcc/cgraphunit.c:1289
    #13 0x0000000000a5dcc3 in symbol_table::finalize_compilation_unit
(this=0x7ffff67ac100) at [...]/gcc/cgraphunit.c:2833
    #14 0x0000000000f2f06d in compile_file () at [...]/gcc/toplev.c:480
    #15 0x00000000006b7095 in do_compile () at [...]/gcc/toplev.c:2172
    #16 toplev::main (this=this@entry=0x7fffffffc260, argc=argc@entry=33,
argv=argv@entry=0x7fffffffc368) at [...]/gcc/toplev.c:2307
    #17 0x00000000006ba9c7 in main (argc=33, argv=0x7fffffffc368) at
[...]/gcc/main.c:39
    (gdb) frame 1
    #1  0x00000000007c8ac1 in discriminator_for_local_entity
(entity=entity@entry=0x7ffff6934ea0) at [...]/gcc/cp/mangle.c:1925
    1925          gcc_checking_assert (DECL_ARTIFICIAL (entity));
    (gdb) call debug_tree(entity)
     <var_decl 0x7ffff6934ea0 Bs
        type <array_type 0x7ffff6910dc8
            type <array_type 0x7ffff6910c78 type <real_type 0x7ffff67cf2a0
float>
                sizes-gimplified type_6 BLK
                size <integer_cst 0x7ffff67cb4b0 constant 512>
                unit-size <integer_cst 0x7ffff691d720 constant 64>
                align:32 warn_if_not_align:0 symtab:0 alias-set -1
canonical-type 0x7ffff6910c78 domain <integer_type 0x7ffff6910bd0>>
            sizes-gimplified BLK
            size <integer_cst 0x7ffff691d708 constant 8192>
            unit-size <integer_cst 0x7ffff691d738 constant 1024>
            align:32 warn_if_not_align:0 symtab:0 alias-set -1 canonical-type
0x7ffff6910dc8
            domain <integer_type 0x7ffff6910bd0 type <integer_type
0x7ffff67c7000 sizetype>
                sizes-gimplified type_6 DI
                size <integer_cst 0x7ffff67a9df8 constant 64>
                unit-size <integer_cst 0x7ffff67a9e10 constant 8>
                align:64 warn_if_not_align:0 symtab:0 alias-set -1
canonical-type 0x7ffff6910bd0 precision:64 min <integer_cst 0x7ffff67a9e28 0>
max <integer_cst 0x7ffff691d6f0 15>>
            pointer_to_this <pointer_type 0x7ffff6910738>>
        addressable used static tree_1 read decl_5 BLK
source-gcc/gcc/testsuite/c-c++-common/gomp/gridify-2.c:18:16 size <integer_cst
0x7ffff691d708 8192> unit-size <integer_cst 0x7ffff691d738 1024>
        align:256 warn_if_not_align:0 context <function_decl 0x7ffff690fd00
tiled_sgemm_tt>
        attributes <tree_list 0x7ffff692ce10
            purpose <identifier_node 0x7ffff6939180 hsa_group_segment
                normal local bindings <(nil)>>> abstract_origin <var_decl
0x7ffff7ff6ea0 Bs> chain <var_decl 0x7ffff69412d0 C_row_start>>
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Subject: [Bug ipa/87843] [9 Regression] SPEC miscompilation of 403.gcc and 502.gcc_r benchmarks
Date: Fri, 02 Nov 2018 13:34:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87843

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
But the following fixes it:

diff --git a/gcc/alias.c b/gcc/alias.c
index 7963ece291a..4c88c0980d3 100644
--- a/gcc/alias.c
+++ b/gcc/alias.c
@@ -1235,14 +1235,14 @@ record_component_aliases (tree type)
               Accesses to it conflicts with accesses to any other pointer
               type.  */
            tree t = TREE_TYPE (field);
-           if (in_lto_p)
+           if (1)
              {
                /* VECTOR_TYPE and ARRAY_TYPE share the alias set with their
                   element type and that type has to be normalized to void *,
                   too, in the case it is a pointer. */
                while (!canonical_type_used_p (t) && !POINTER_TYPE_P (t))
                  {
-                   gcc_checking_assert (TYPE_STRUCTURAL_EQUALITY_P (t));
+                   gcc_checking_assert (!in_lto_p ||
TYPE_STRUCTURAL_EQUALITY_P (t));
                    t = TREE_TYPE (t);
                  }
                if (POINTER_TYPE_P (t))
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Subject: [Bug tree-optimization/87859] [8/9 Regression] store-merging miscompilation of mesa
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87859

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 44948
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44948&action=edit
gcc9-pr87859.patch

WIP patch.
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Subject: [Bug c++/87862] Different behavior with -O2 with template specialization of virtual member function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87862

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This looks like undefined behaviour. You have a template specialization in
s.cpp but none of the other files can see that specialization exists, and so
they implicitly instantiate t<z::e>::get_b based on the primary template, which
returns a null pointer, which you dereference.
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Subject: [Bug c++/87863] [9 Regression] c-c++-common/gomp/gridify-{2,3}.c ICE
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87863

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |9.0
            Summary|c-c++-common/gomp/gridify-{ |[9 Regression]
                   |2,3}.c ICE                  |c-c++-common/gomp/gridify-{
                   |                            |2,3}.c ICE
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Subject: [Bug target/87853] _mm_cmpgt_epi8 broken with -funsigned-char
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87853

--- Comment #5 from Terry Guo <xuepeng.guo at intel dot com> ---
Hi folks,

What about a fix like below? I tested with bootstrap and regression test, there
is no problem.

diff --git a/gcc/config/i386/emmintrin.h b/gcc/config/i386/emmintrin.h
index 7a6ff80..3c1f04b 100644
--- a/gcc/config/i386/emmintrin.h
+++ b/gcc/config/i386/emmintrin.h
@@ -45,6 +45,7 @@ typedef unsigned int __v4su __attribute__ ((__vector_size__
(16)));
 typedef short __v8hi __attribute__ ((__vector_size__ (16)));
 typedef unsigned short __v8hu __attribute__ ((__vector_size__ (16)));
 typedef char __v16qi __attribute__ ((__vector_size__ (16)));
+typedef signed char __v16qs __attribute__ ((__vector_size__ (16)));
 typedef unsigned char __v16qu __attribute__ ((__vector_size__ (16)));

 /* The Intel API is flexible enough that we must allow aliasing with other
@@ -1295,7 +1296,7 @@ _mm_xor_si128 (__m128i __A, __m128i __B)
 extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__,
__artificial__))
 _mm_cmpeq_epi8 (__m128i __A, __m128i __B)
 {
-  return (__m128i) ((__v16qi)__A == (__v16qi)__B);
+  return (__m128i) ((__v16qs)__A == (__v16qs)__B);
 }

 extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__,
__artificial__))
@@ -1313,7 +1314,7 @@ _mm_cmpeq_epi32 (__m128i __A, __m128i __B)
 extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__,
__artificial__))
 _mm_cmplt_epi8 (__m128i __A, __m128i __B)
 {
-  return (__m128i) ((__v16qi)__A < (__v16qi)__B);
+  return (__m128i) ((__v16qs)__A < (__v16qs)__B);
 }

 extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__,
__artificial__))
@@ -1331,7 +1332,7 @@ _mm_cmplt_epi32 (__m128i __A, __m128i __B)
 extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__,
__artificial__))
 _mm_cmpgt_epi8 (__m128i __A, __m128i __B)
 {
-  return (__m128i) ((__v16qi)__A > (__v16qi)__B);
+  return (__m128i) ((__v16qs)__A > (__v16qs)__B);
 }

 extern __inline __m128i __attribute__((__gnu_inline__, __always_inline__,
__artificial__))
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Subject: [Bug c++/87862] Different behavior with -O2 with template specialization of virtual member function
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87862

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The relevant quote from the standard is:

If a template, a member template or a member of a class template is explicitly
specialized then that specialization shall be declared before the first use of
that specialization that would cause an implicit instantiation to take place,
in every translation unit in which such a use occurs; no diagnostic is
required.
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Subject: [Bug d/87864] New: libdruntime doesn't link with /bin/ld before Solaris 11.4
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87864

            Bug ID: 87864
           Summary: libdruntime doesn't link with /bin/ld before Solaris
                    11.4
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
          Reporter: ro at gcc dot gnu.org
  Target Milestone: ---
              Host: *-*-solaris2.*

When I tried to build libphobos on Solaris 11.3 (all previous attempts have
been
on 11.4 or 11.5 Beta), linking libdruntime failed:

Undefined                 first referenced
 symbol                             in file
__stop_minfo                        core/.libs/atomic.o  (symbol scope
specifies local binding)
__start_minfo                       core/.libs/atomic.o  (symbol scope
specifies local binding)
ld: fatal: symbol referencing errors
collect2: error: ld returned 1 exit status
make[4]: *** [Makefile:1709: libgdruntime.la] Error 1

This is no wonder actually, since DCFG_MINFO_BRACKETING=false.  Support for the
automatic creation of __start_<section> and __stop_<section> symbols (a GNU ld
extension) was only added to Solaris ld in 11.4 due to its several uses in
LLVM.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87864

Rainer Orth <ro at gcc dot gnu.org> changed:

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----------------------------------------------------------------------------
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Subject: [Bug d/87865] New: gdc doesn't build unless assert is marked noreturn
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87865

            Bug ID: 87865
           Summary: gdc doesn't build unless assert is marked noreturn
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
          Reporter: ro at gcc dot gnu.org
  Target Milestone: ---
              Host: *-*-solaris2.10

When I tried to build gdc on Solaris 10, it failed to compile like this:

/vol/gcc/src/hg/trunk/local/gcc/d/dmd/arrayop.c: In member function 'virtual
void buildArrayIdent(Expression*, OutBuffer*,
Expressions*)::BuildArrayIdentVisitor::visit(BinAssignExp*)':
/vol/gcc/src/hg/trunk/local/gcc/d/dmd/arrayop.c:336:29: error: 's' may be used
uninitialized in this function [-Werror=maybe-uninitialized]
  336 |             buf->writestring(s);
      |             ~~~~~~~~~~~~~~~~^~~

/vol/gcc/src/hg/trunk/local/gcc/d/dmd/ctfeexpr.c: In function 'int
comparePointers(TOK, Expression*, dinteger_t, Expression*, dinteger_t)':
/vol/gcc/src/hg/trunk/local/gcc/d/dmd/ctfeexpr.c:925:13: error: 'n' may be used
uninitialized in this function [-Werror=maybe-uninitialized]
  925 |         int n;
      |             ^

and several more, obviously due to assert not being marked noreturn in
<assert.h>, unlike Solaris 11.

When I manually add __attribute__((__noreturn__)) to the _assert declarations
and place the result in gcc/include-fixed/assert.h, the gdc compilation to
finish.

If only a single target were affected by this, doing the fixup via fixincludes
might be an options; in case there are others, that doesn't seem the right
solution.

In fact, gdc should use gcc_unreachable () anyway: gcc/tsystem.h adds the
noreturn attribute to the declaration to avoid the failure.
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Subject: [Bug sanitizer/82501] AddressSanitizer does not handle negative offset for first global variable
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82501

Martin LiÅ¡ka <marxin at gcc dot gnu.org> changed:

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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87865

Rainer Orth <ro at gcc dot gnu.org> changed:

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Subject: [Bug d/87866] New: gdc fails to compile minimal test
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87866

            Bug ID: 87866
           Summary: gdc fails to compile minimal test
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: d
          Assignee: ibuclaw at gdcproject dot org
          Reporter: ro at gcc dot gnu.org
  Target Milestone: ---
              Host: *-*-solaris2.10

Continuing from the failure described in PR d/87865 with the workaround
mentioned
there,libphobos fails to configure:

configure: error: can't compile D sources!

config.log shows

configure:4846: /var/gcc/regression/trunk/10-gcc-gas/build/./gcc/gdc
-B/var/gcc/regression/trunk/10-gcc-gas/build/./gcc/
-B/vol/gcc/sparc-sun-solaris2.10/bin/ -B/vol/gcc/sparc-sun-solaris2.10/lib/
-isystem /vol/gcc/sparc-sun-solaris2.10/include -isystem
/vol/gcc/sparc-sun-solaris2.10/sys-include   -fchecking=1 -c -fno-moduleinfo
-nostdinc -I /vol/gcc/src/hg/trunk/local/libphobos/libdruntime  -O2 -g
conftest.d >&5
d21: error: cannot find source code for runtime library file 'object.d'
d21: note: dmd might not be correctly installed. Run 'dmd -man' for
installation
 instructions.

in pp_string, at pretty-print.c:1701
0x1188dc3 pp_string(pretty_printer*, char const*)
        /vol/gcc/src/hg/trunk/local/gcc/pretty-print.c:1701
0x1188dc3 pp_string(pretty_printer*, char const*)
        /vol/gcc/src/hg/trunk/local/gcc/pretty-print.c:1699
0x118a23b pp_format(pretty_printer*, text_info*)
        /vol/gcc/src/hg/trunk/local/gcc/pretty-print.c:1294
0x11785a7 diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
        /vol/gcc/src/hg/trunk/local/gcc/diagnostic.c:1004
0x336fe7 d_diagnostic_report_diagnostic
        /vol/gcc/src/hg/trunk/local/gcc/d/d-diagnostic.cc:138
0x3371f7 errorSupplemental(Loc const&, char const*, ...)
        /vol/gcc/src/hg/trunk/local/gcc/d/d-diagnostic.cc:206
0x22871f Module::read(Loc)
        /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dmodule.c:313
0x22aa43 Module::load(Loc, Array<Identifier*>*, Identifier*)
        /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dmodule.c:278
0x20f003 Import::load(Scope*)
        /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dimport.c:155
0x20f227 Import::importAll(Scope*)
        /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dimport.c:174
0x20f227 Import::importAll(Scope*)
        /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dimport.c:170
0x227fff Module::importAll(Scope*)
        /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dmodule.c:790
0x227fff Module::importAll(Scope*)
        /vol/gcc/src/hg/trunk/local/gcc/d/dmd/dmodule.c:725
0x3415b7 d_parse_file()
        /vol/gcc/src/hg/trunk/local/gcc/d/d-lang.cc:1099

When I run the compiler under truss -f, I find that it only looks in its
 working directory for some reason:

4398:   read(4, " m o d u l e   m o d ;\n".., 50)       = 50
4398:   close(4)                                        = 0
4398:   stat64("object.di", 0xFFBFE980)                 Err#2 ENOENT
4398:   stat64("object.d", 0xFFBFE980)                  Err#2 ENOENT
4398:   stat64("object", 0xFFBFE980)                    Err#2 ENOENT
4398:   open64("object.d", O_RDONLY)                    Err#2 ENOENT

I haven't yet dug further or compared with what happens on Solaris 11 where
this works fine.
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Rainer Orth <ro at gcc dot gnu.org> changed:

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Marek Polacek <mpolacek at gcc dot gnu.org> changed:

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--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
When did this start?
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Subject: [Bug middle-end/87852] [9 Regression] FAIL: gcc.c-torture/execute/pr53465.c
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--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Eric, you added partitions_for_undefined_values and IIRC that was just narrow
> scope enough to fix a specific issue but not generally address shortcomings
> within RTL?

Yes, it's only enabled for SUBREG_PROMOTED_VAR_P at the moment.
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--- Comment #6 from UroÅ¡ Bizjak <ubizjak at gmail dot com> ---
(In reply to Terry Guo from comment #5)
> What about a fix like below? I tested with bootstrap and regression test,
> there is no problem.

LGTM.
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Subject: [Bug c++/87861] [9 regression] ICE in output_constructor_regular_field, at varasm.c:5165
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--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
It's unlikely that this is caused by my latest patch implementing P0846R0, that
only triggers with C++2a.
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Jeffrey A. Law <law at redhat dot com> changed:

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--- Comment #18 from Jeffrey A. Law <law at redhat dot com> ---
MPX/CHKP is dead.  62077 tracks the deeper issues.
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--- Comment #42 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Author: tnfchris
Date: Fri Nov  2 15:27:30 2018
New Revision: 265749

URL: https://gcc.gnu.org/viewcvs?rev=265749&root=gcc&view=rev
Log:
Fix mingw-w64 Ada native bootstrap (PR81878).

Due to the changes in PR81878 builds of GCC8 and trunk are impossible
with Ada enabled[1][2].

The reason the patch breaks the bootstrap is due to how gnatlink receives it's
arguments.

gnatlink is usually invoked as

        $(GNATLINK) -v gnatcmd -o ../../gnat$(exeext) \
          --GCC="$(CC) $(ADA_INCLUDES)" --LINK="$(GCC_LINK)" $(TOOLS_LIBS)

so it passes $(CC) and $(GCC_LINK) as quoted arguments to the program.
Because of this quotation the msys2 shell does not translate any paths in
$(CC) and $(GCC_LINK) from their Unix version to their Windows version.

Furthermore because there are multiple paths in the values separated by space
and because the paths often contain a prefix like -L (e.g. -L/f/foo) we can't
use `fix_srcfile_path` to fix this.

An alternative solution would have been to create a stub program that echos the
commandline options it receives back, and calling this program with $(CC) and
$(GCC_LINK)
unquoted to get them translated.  However this was a bit more invasive.

So instead for native compilations we add -B../../ such that it picks up the
lto plugin
from the previous built compiler.  Since it's native there shouldn't be a
mismatch here.

[1] https://github.com/Alexpux/MINGW-packages/pull/3877#issuecomment-408651809
[2] https://gcc.gnu.org/ml/gcc/2018-07/msg00410.html

gnattools/ChangeLog:

2018-11-02  Tamar Christina  <tamar.christina@arm.com>

        Backport from mainline
        2018-10-29  Tamar Christina  <tamar.christina@arm.com>

        PR ada/81878
        * Makefile.in (TOOLS_FLAGS_TO_PASS_NATIVE): Add -B ../../.


Modified:
    branches/gcc-8-branch/gnattools/ChangeLog
    branches/gcc-8-branch/gnattools/Makefile.in
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Subject: [Bug rtl-optimization/87678] Redundant vmovss with -fPIC
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--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
It tries twice, first just the substitution, and then that modified with
the REG_EQUAL.  You know a mem is not often valid in the resulting insn,
but combine doesn't, and that is not the same thing as not having a mem
in the inputs anyway!
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87861

--- Comment #3 from Andreas Schwab <schwab@linux-m68k.org> ---
http://gcc.gnu.org/ml/gcc-patches/2018-09/msg01052.html
>From gcc-bugs-return-620038-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Fri Nov 02 15:49:49 2018
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/87678] Redundant vmovss with -fPIC
Date: Fri, 02 Nov 2018 15:49:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87678

--- Comment #5 from UroÅ¡ Bizjak <ubizjak at gmail dot com> ---
(In reply to Segher Boessenkool from comment #4)
> It tries twice, first just the substitution, and then that modified with
> the REG_EQUAL.  You know a mem is not often valid in the resulting insn,
> but combine doesn't, and that is not the same thing as not having a mem
> in the inputs anyway!

I have traced this a bit through the combine.c. When creating the combined
pattern in subst (), there is following code at the end:

  for (i = 0; i < 4; i++)
    {
      /* If X is sufficiently simple, don't bother trying to do anything
         with it.  */
      if (code != CONST_INT && code != REG && code != CLOBBER)
        x = combine_simplify_rtx (x, op0_mode, in_dest, in_cond);

      if (GET_CODE (x) == code)
        break;

      code = GET_CODE (x);

      /* We no longer know the original mode of operand 0 since we
         have changed the form of X)  */
      op0_mode = VOIDmode;
    }

And going through combine_simplify_rtx:

    case RTX_COMM_ARITH:
    case RTX_BIN_ARITH:
      temp = simplify_binary_operation (code, mode, XEXP (x, 0), XEXP (x, 1));
      break;

Following this to simplify_binary_operation, we have at the beginning:

  trueop0 = avoid_constant_pool_reference (op0);
  trueop1 = avoid_constant_pool_reference (op1);

  tem = simplify_const_binary_operation (code, mode, trueop0, trueop1);

Here, all hope is lost. avoid_constant_pool_reference *always* simplifies
memory fetch to a constant for constant pool symbol references, defeating all
chances of memory operand propagation.
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Subject: [Bug rtl-optimization/87678] Redundant vmovss with -fPIC
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87678

--- Comment #6 from UroÅ¡ Bizjak <ubizjak at gmail dot com> ---
Here is a bit simpler testcase:

--cut here--
typedef float __v4sf __attribute__((__vector_size__ (16)));

__v4sf
foo (__v4sf x)
{
  return x + (__v4sf){ 2.3f, 2.3f, 2.3f, 2.3f };
}
--cut here--

"cc1 -O2" on x86_64 target will show the issue in _.combine dump.
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From: Gina Cianfrone <gcianfrone@vanguardnnj.com>
Subject: Got germs?
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