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 889BB3939C3E; Mon, 29 Jun 2020 21:44:15 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 889BB3939C3E
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1593467055;
 bh=CRazjk9ir9SY9mkpBB4dyuqoqj9RBpXRLjYniDcTpTI=;
 h=From:To:Subject:Date:From;
 b=rj2niu6xdLpflT/C8x4mEdVHwdUUZc+/moP+vt4p70kZd7G0Xqkep+txKiDjs0x69
 CeNc9hebB+KkInZt+fX4CuHbbsMhAOrIuyGx297RM8nyxd7Bi4wKFNDU/YANLjzs9s
 ZVPteU9BszqsOQLXYQIK4AotQFQjVrHCrXK5tpHE=
From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/95987] New: Another ice during GIMPLE pass: slp
Date: Mon, 29 Jun 2020 21:44:15 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
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-95987-4@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: Mon, 29 Jun 2020 21:44:15 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95987

            Bug ID: 95987
           Summary: Another ice during GIMPLE pass: slp
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

For this C++ code:

$ cat bug627.cc
int a;
class b {
  void c();
  static int f[];
};
void b::c() {
  for (int d; d; ++d)
    for (int e =3D 0; e < 6; ++e)
      f[e] =3D e + 4 << a;
}

compiled on recent gcc trunk, does this:

$ /home/dcb/gcc/results/bin/c++  -c -w -O3 -std=3Dc++14 bug627.cc
bug627.cc: In member function =E2=80=98void b::c()=E2=80=99:
bug627.cc:6:6: error: definition in block 3 follows the use
    6 | void b::c() {
      |      ^
for SSA_NAME: a.0_16 in statement:
vect__17.12_53 =3D vect_cst__12 << a.0_16;
during GIMPLE pass: slp
bug627.cc:6:6: internal compiler error: verify_ssa failed
0x13fa7db verify_ssa(bool, bool)
        ../../trunk.git/gcc/tree-ssa.c:1208
0x108dde5 execute_function_todo
        ../../trunk.git/gcc/passes.c:1992

The bug seems to first occur sometime between 20200624 and 20200625.=