From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20316 invoked by alias); 8 Feb 2014 23:41:58 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 20295 invoked by uid 48); 8 Feb 2014 23:41:55 -0000 From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/60121] gcc does not warn an obvious out-of-bound array access at -O0 and -O1 Date: Sat, 08 Feb 2014 23:41:00 -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: 4.9.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: pinskia at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED 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: component Message-ID: In-Reply-To: References: 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: 2014-02/txt/msg00850.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60121 Andrew Pinski changed: What |Removed |Added ---------------------------------------------------------------------------- Component|c |middle-end --- Comment #2 from Andrew Pinski --- I think this is expected. out of bounds warnings come not from the front-end but the middle-end and are designed not to warn about in dead code. This code is dead as a != 0 is always false.