From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 7953 invoked by alias); 6 May 2014 06:13:02 -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 7920 invoked by uid 48); 6 May 2014 06:12:59 -0000 From: "wence at gmx dot li" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/61068] -O3 generates bad code (when tree-vectorize or inline-functions is on) Date: Tue, 06 May 2014 06:13:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 4.8.2 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: wence at gmx dot li 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: 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: 2014-05/txt/msg00320.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61068 --- Comment #5 from Lawrence Mitchell --- (In reply to Zdenek Sojka from comment #3) > You are casting "double arg1_0[12][3]" (and others) to "(double *)arg1_0" > and then using it as a single-dimensional array. The code has undefined > behaviour. Apologies, I I've updated the test case to use 1D arrays everywhere and the problem persists. I believe this latter does not invoke undefined behaviour. Thanks, Lawrence