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 8366D3857C46; Sun, 26 Jul 2020 19:03:17 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8366D3857C46
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1595790197;
 bh=/LTa1FSSn+EsCAJ0ub45UvxJvzspZ1kqpuGC3HjL2ho=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=fxtLy8ovWm+MzJFe9bnjrKVfV3vCxBGhKHbQRK02WAhlL0F0NuzVKjUeMxXpJZBdK
 N/w0nOGkLck6l1ggd4J0PZ/2wkQCgJtUdnxZAsthdVPiP3dtSaMhBRmufOVOO+5Zxo
 Pdc/kT7nm6xqOcg7J50B7sBc0KyRI9ppNMmhk9YU=
From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/96317] [8/9/10/11] Int compare optimizations make some errors
Date: Sun, 26 Jul 2020 19:03:17 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: 11.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: marxin at gcc dot gnu.org
X-Bugzilla-Status: RESOLVED
X-Bugzilla-Resolution: INVALID
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: cc
Message-ID: <bug-96317-4-rgjRkhYce8@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-96317-4@http.gcc.gnu.org/bugzilla/>
References: <bug-96317-4@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: Sun, 26 Jul 2020 19:03:17 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96317

Martin Li=C5=A1ka <marxin at gcc dot gnu.org> changed:

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

--- Comment #3 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
Or you can use UBSAN to see that:

$ gcc pr96317.c -fsanitize=3Dundefined && ./a.out=20
pr96317.c:7:9: runtime error: signed integer overflow: 2147483647 + 1 canno=
t be
represented in type 'int'
111
pr96317.c:18:9: runtime error: signed integer overflow: 2147483647 + 1 cann=
ot
be represented in type 'int'
333=