From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id EAF60386F47D; Sat, 27 Jun 2020 11:27:42 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org EAF60386F47D
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1593257262;
 bh=SQHkC5gOdUHuThyM64K7xC5Fedkksa/7QTEu9xnCGn4=;
 h=From:To:Subject:Date:From;
 b=cPI26nuMbTSIk8wJ9sALgVI3Rx/jcWXjlEvIBxEllnYvxBh41a+nJ5YJk4HbIC4is
 G6QqqFOpoT1Xoar5FbvNXY6Lia+WqpXcj8yBiQtbhX5LNGtcQ7uGB2N3E+gCfInZu8
 3UoIqfGx/ZJFDttz4rxuitosIg7p/zV5Ch+SdCIA=
From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/95939] New: ice with -O3 in compute_live_loop_exits
Date: Sat, 27 Jun 2020 11:27:42 +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: unknown
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
Message-ID: <bug-95939-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <http://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Sat, 27 Jun 2020 11:27:43 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95939

            Bug ID: 95939
           Summary: ice with -O3 in compute_live_loop_exits
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Recent gcc trunk gfortran compiler does this:

$ /home/dcb/gcc/results/bin/gfortran -c -O3 ./gfortran.dg/graphite/pr42285.=
f90
during GIMPLE pass: vect
./gfortran.dg/graphite/pr42285.f90:3:0:

    3 | SUBROUTINE EFGRDM(NCF,NFRG,G,RTRMS,GM,IOPT,K1)
      |=20
internal compiler error: in compute_live_loop_exits, at
tree-ssa-loop-manip.c:247
0x6d94fd compute_live_loop_exits
        ../../trunk.git/gcc/tree-ssa-loop-manip.c:247
0x6d94fd add_exit_phis_var
        ../../trunk.git/gcc/tree-ssa-loop-manip.c:334
0x6d94fd add_exit_phis
        ../../trunk.git/gcc/tree-ssa-loop-manip.c:356
0x6d94fd rewrite_into_loop_closed_ssa_1(bitmap_head*, unsigned int, int, lo=
op*)
        ../../trunk.git/gcc/tree-ssa-loop-manip.c:678

This seems to have gone wrong sometime between date 20200624
and 20200625.

It is often worthwhile to run all the Fortran code in the testsuite=20
through the compiler with -O3 or -O3 -march=3Dnative.=