From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-470743-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 18082 invoked by alias); 15 Dec 2014 14:42:02 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 17425 invoked by uid 48); 15 Dec 2014 14:41:55 -0000
From: "izamyatin at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/64316] New: [5 Regression] ICE in simplify_const_unary_operation after r218503
Date: Mon, 15 Dec 2014 14:42:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Version: 5.0
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: izamyatin at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter cf_gcctarget attachments.created
Message-ID: <bug-64316-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2014-12/txt/msg01750.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64316

            Bug ID: 64316
           Summary: [5 Regression] ICE in simplify_const_unary_operation
                    after r218503
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: izamyatin at gmail dot com
            Target: x86

Created attachment 34284
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34284&action=edit
Reproducer

For the attached reproducer compiled with -O3 -march=core-avx2 there is:

internal compiler error: in simplify_const_unary_operation, at
simplify-rtx.c:1676
 }
 ^ 
0xbd8b9b simplify_const_unary_operation(rtx_code, machine_mode, rtx_def*,
machine_mode)
        ../../gcc/simplify-rtx.c:1676
0xbd6045 simplify_unary_operation(rtx_code, machine_mode, rtx_def*,
machine_mode)
        ../../gcc/simplify-rtx.c:822
0xbd4f75 simplify_gen_unary(rtx_code, machine_mode, rtx_def*, machine_mode)
        ../../gcc/simplify-rtx.c:395
0x136761f if_then_else_cond
        ../../gcc/combine.c:8748
0x135e155 combine_simplify_rtx
        ../../gcc/combine.c:5394
0x135dea3 subst
        ../../gcc/combine.c:5331
0x135dca2 subst
        ../../gcc/combine.c:5276
0x135dca2 subst
        ../../gcc/combine.c:5276
0x1357a53 try_combine
        ../../gcc/combine.c:3250
0x1352ba8 combine_instructions
        ../../gcc/combine.c:1301
0x13740c3 rest_of_handle_combine
        ../../gcc/combine.c:14052
0x137416a execute
        ../../gcc/combine.c:14095
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.


This actually leads to miscompilation of spec2006/403.gcc with -march=core-avx2