[Bug c/63600] New: ice in ix86_expand_sse2_abs

[Bug c/63600] New: ice in ix86_expand_sse2_abs

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63600

            Bug ID: 63600
           Summary: ice in ix86_expand_sse2_abs
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com

Created attachment 33760
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33760&action=edit
C source code

I just tried to compile the attached code
on gcc trunk dated 20141019 on an AMD x86_64 box.

The compiler said

bug168.c: In function ‘long_unary_op’:
bug168.c:11345:32: internal compiler error: in ix86_expand_sse2_abs, at
config/i386/i386.c:45977
  for (n = 0; n < na; n++) b[n] = (((a[n]) >= 0) ? (a[n]) : -(a[n]));
                                ^
0xf9ff5e ix86_expand_sse2_abs(rtx_def*, rtx_def*)
    ../../src/trunk/gcc/config/i386/i386.c:45977
0x10c707a gen_absv2di2(rtx_def*, rtx_def*)
    ../../src/trunk/gcc/config/i386/sse.md:13834
0xb1dc09 insn_gen_fn::operator()(rtx_def*, rtx_def*) const
    ../../src/trunk/gcc/recog.h:308
0xb1dc09 maybe_gen_insn(insn_code, unsigned int, expand_operand*)
    ../../src/trunk/gcc/optabs.c:8348
0xb1dc09 expand_unop_direct

Flag -O3 required. The attached code is the same source
code was provided for bug #53749.
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From: "sneves at dei dot uc.pt" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/63601] New: Segfault on usage of 'this' in unevaluated context inside lambda
Date: Mon, 20 Oct 2014 09:12:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc601

            Bug ID: 63601
           Summary: Segfault on usage of 'this' in unevaluated context
                    inside lambda
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sneves at dei dot uc.pt

The following minimal example results in an 'ICE: Segmentation fault' in g++
4.8.1, 4.9.1, and 5.0.0 20141019:

auto f = []{ sizeof(this); };

[Bug target/63600] [5 Regression] ice in ix86_expand_sse2_abs

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63600

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-10-20
                 CC|                            |jakub at gcc dot gnu.org
   Target Milestone|---                         |5.0
            Summary|ice in ix86_expand_sse2_abs |[5 Regression] ice in
                   |                            |ix86_expand_sse2_abs
     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r216255.  Reduced testcase for -O3:
long *a, b;
int c;
void
foo (void)
{
  for (c = 0; c < 64; c++)
    a[c] = b >= 0 ? b : -b;
}

[Bug target/63600] [5 Regression] ice in ix86_expand_sse2_abs

[kyukhin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63600

--- Comment #2 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Created attachment 33779
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33779&action=edit
Patch is under testing now.

[Bug target/63600] [5 Regression] ice in ix86_expand_sse2_abs

[kyukhin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63600

--- Comment #4 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #3)
> I would have expected VI instead of IV in the iterator name, but I never
> understood the rules for i?86 iterator names.
> And, you want the testcase in the testsuite too.

Agh, right! Thanks. I'll post patch w/ renamed iterator and
a testcase (from this bug)

[Bug target/63600] [5 Regression] ice in ix86_expand_sse2_abs

[kyukhin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63600

--- Comment #5 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Created attachment 33793
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33793&action=edit
Updated patch + regtest

Will check in after testing is over

[Bug target/63600] [5 Regression] ice in ix86_expand_sse2_abs

[kyukhin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63600

--- Comment #6 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
(In reply to Kirill Yukhin from comment #5)
> Created attachment 33793 [details]
> Updated patch + regtest
> 
> Will check in after testing is over

Checked into main trunk (forgot to put PR into ChangeLogs).
https://gcc.gnu.org/ml/gcc-cvs/2014-10/msg00853.html

[Bug target/63600] [5 Regression] ice in ix86_expand_sse2_abs

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63600

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

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

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: kyukhin
Date: Thu Oct 23 11:50:19 2014
New Revision: 216591

URL: https://gcc.gnu.org/viewcvs?rev=216591&root=gcc&view=rev
Log:
AVX. Fix block absq emit for non AVX-512 targets.

gcc/
    * config/i386/sse.md (define_mode_iterator VI1248_AVX512VL_AVX512BW):
    New.
    (define_insn "*abs<mode>2"): Use VI1248_AVX512VL_AVX512BW mode
    iterator.
    (define_expand "abs<mode>2"): Ditto.

gcc/testsuite/
    * gcc.target/i386/pr63600.c: New.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr63600.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/sse.md
    trunk/gcc/testsuite/ChangeLog