From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-500914-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 6876 invoked by alias); 29 Oct 2015 14:51:29 -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 6835 invoked by uid 48); 29 Oct 2015 14:51:26 -0000
From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/68146] New: ice in gimple_stmt_nonnegative_warnv_p with -O2
Date: Thu, 29 Oct 2015 14:51:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 6.0
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: dcb314 at hotmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution:
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 target_milestone attachments.created
Message-ID: <bug-68146-4@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: 2015-10/txt/msg02469.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68146

            Bug ID: 68146
           Summary: ice in gimple_stmt_nonnegative_warnv_p with -O2
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 36613
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36613&action=edit
FORTRAN source code

The attached FORTRAN code, when compiled with -c -O2 on x86_64,
does this

internal compiler error: Segmentation fault
0xc4d67f crash_signal
        ../../src/trunk/gcc/toplev.c:353
0x991e56 gimple_stmt_nonnegative_warnv_p(gimple*, bool*, int)
        ../../src/trunk/gcc/gimple-fold.c:6266
0x991f21 gimple_phi_nonnegative_warnv_p
        ../../src/trunk/gcc/gimple-fold.c:6251
0x991f21 gimple_stmt_nonnegative_warnv_p(gimple*, bool*, int)
        ../../src/trunk/gcc/gimple-fold.c:6276
0x92d9f5 tree_expr_nonnegative_p(tree_node*)
        ../../src/trunk/gcc/fold-const.c:13164

gimple-fold.c:6266 is

switch (gimple_code (stmt))