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 C2F93385782D; Thu,  1 Apr 2021 20:57:10 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C2F93385782D
From: "carl.nettelblad at it dot uu.se" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/99877] New: Crash in GIMPLE pass:sanopt in huge
 function using OpenMP
Date: Thu, 01 Apr 2021 20:57:10 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: sanitizer
X-Bugzilla-Version: 10.2.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: carl.nettelblad at it dot uu.se
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 cc target_milestone
 attachments.created
Message-ID: <bug-99877-4@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: <https://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: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Thu, 01 Apr 2021 20:57:10 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99877

            Bug ID: 99877
           Summary: Crash in GIMPLE pass:sanopt in huge function using
                    OpenMP
           Product: gcc
           Version: 10.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: carl.nettelblad at it dot uu.se
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org, marxi=
n at gcc dot gnu.org
  Target Milestone: ---

Created attachment 50499
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D50499&action=3Dedit
Command line and output

This code has worked (seemingly) just fine until the new function
computecandcliques was added, with a heap corruption bug (in my own code).

When trying to track this bug down, I tried to compile the thing with addre=
ss
sanitizer, but I kept getting crashes even when successively reducing
optimization settings and trying a few other things. I know this is certain=
ly
not a minimal test case, but I hope it is reproducible for you with these
files. I did confirm crashes with very similar error output on optimization
levels 3 to 1 and on various versions of GCC 9.x and 10.x. I don't have rea=
dy
access to 10.2.1, though.=