From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20938 invoked by alias); 16 Dec 2010 11:35:43 -0000 Received: (qmail 20869 invoked by uid 22791); 16 Dec 2010 11:35:42 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 16 Dec 2010 11:35:39 +0000 From: "irar at il dot ibm.com" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/46969] [4.6 Regression] -fcompare-debug failure with -O -ftree-vectorize -ftree-parallelize-loops=2 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: irar at il dot ibm.com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.6.0 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Thu, 16 Dec 2010 11:35:00 -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 X-SW-Source: 2010-12/txt/msg01884.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46969 --- Comment #3 from Ira Rosen 2010-12-16 11:35:19 UTC --- This revision changed the realignment for the loop, we now use loop peeling to make the accesses aligned. Maybe auto-par doesn't handle the peeled loop correctly? Also after a small change in the code I couldn't see the error anymore, even after reverting the change.