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 8A6EC386F477; Tue,  9 Jun 2020 17:33:51 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8A6EC386F477
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1591724031;
 bh=34v4loi/IPRJ+rRUy5yryBC6QpSfIR8zW4woe8uXk9Q=;
 h=From:To:Subject:Date:From;
 b=bPuloW+krtPuIbnhDdYrBZRZSVNhHdlOxvzoisPeAV2eVqLNTPdz3GsMRQDjne3/7
 i4arWbhN08zVxdom8eBzLIIGcHEvOhIYugyrjTDZNgwKM347r/hbEKkZPrii0W+2c+
 fuiXxRXpyYwRGVj+S1dTS5tvuK45TEqicJQP6qQo=
From: "gscfq@t-online.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/95613] New: ICE in main_block_label, at tree-cfg.c:1455
Date: Tue, 09 Jun 2020 17:33:51 +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: 11.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: gscfq@t-online.de
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-95613-4@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: Tue, 09 Jun 2020 17:33:51 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95613

            Bug ID: 95613
           Summary: ICE in main_block_label, at tree-cfg.c:1455
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Affects versions down to at least r5 :


$ cat z1.f90
program p
   select case (0)
 2 end select
   goto 2
end


$ cat z2.f90
program p
   select case (0)
 2 end select
   stop
   goto 2
end


$ cat z3.f90
program p
   select case (0)
   case (2:1)
 2    stop
   end select
   goto 2
end


$ cat z4.f90
program p
   select case (0)
   case (2:1)
      2 stop
   case (3)
      goto 2
   end select
end


$ gfortran-11-20200607 -c z1.f90
z1.f90:3:2:

    3 |  2 end select
      |  1
    4 |    goto 2
      |         2
Warning: Legacy Extension: Label at (1) is not in the same block as the GOTO
statement at (2)
during GIMPLE pass: cfg
z1.f90:1:0:

    1 | program p
      |
internal compiler error: Segmentation fault
0xbc593f crash_signal
        ../../gcc/toplev.c:328
0xbf6d3b main_block_label
        ../../gcc/tree-cfg.c:1455
0xbf7271 cleanup_dead_labels()
        ../../gcc/tree-cfg.c:1639
0xc0186b build_gimple_cfg
        ../../gcc/tree-cfg.c:238
0xc0186b execute_build_cfg
        ../../gcc/tree-cfg.c:369
0xc0186b execute
        ../../gcc/tree-cfg.c:405=