From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-467275-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 7432 invoked by alias); 18 Nov 2014 17:11:40 -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 7402 invoked by uid 48); 18 Nov 2014 17:11:36 -0000
From: "trippels at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/63879] [5 Regression] ICE compiling Linux Kernel fs/ext3/namei.c with -fsanitize=undefined
Date: Tue, 18 Nov 2014 17:11:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Version: 5.0
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: trippels at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Priority: P1
X-Bugzilla-Assigned-To: mpolacek at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 5.0
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-63879-4-5L4Hg81749@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-63879-4@http.gcc.gnu.org/bugzilla/>
References: <bug-63879-4@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: 2014-11/txt/msg01747.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63879

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |trippels at gcc dot gnu.org

--- Comment #8 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Reduced:

trippels@gcc2-power8 ~ % cat namei.i
struct
{
  int inode;
} * a;
int b, c;
void
fn1 ()
{
  int d = 0;
  while (b)
    {
      if (a->inode)
        d++;
      a = 0;
    }
  c = d - 1;
  for (; c >= 0; c--)
    ;
}

trippels@gcc2-power8 ~ % gcc -O2 -fsanitize=undefined namei.i
gcc: internal compiler error: Segmentation fault (program cc1)

gdb backtrace looks identical to that from the testcase of PR63520 comment 11.