From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2727 invoked by alias); 6 Sep 2012 10:21:55 -0000 Received: (qmail 2713 invoked by uid 22791); 6 Sep 2012 10:21:53 -0000 X-SWARE-Spam-Status: No, hits=-4.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED 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, 06 Sep 2012 10:21:37 +0000 From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/54498] [4.7/4.8 Regression] incorrect code generation from g++ -O Date: Thu, 06 Sep 2012 10:21:00 -0000 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: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.7.2 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 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: 2012-09/txt/msg00442.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54498 --- Comment #3 from Richard Guenther 2012-09-06 10:21:36 UTC --- Testing Index: gcc/tree-ssa-alias.c =================================================================== --- gcc/tree-ssa-alias.c (revision 191016) +++ gcc/tree-ssa-alias.c (working copy) @@ -2094,7 +2094,10 @@ walk_non_aliased_vuses (ao_ref *ref, tre /* Lookup succeeded. */ else if (res != NULL) break; - /* Translation succeeded, continue walking. */ + /* Translation succeeded, continue walking. We have to + again visit cycles though. */ + if (visited) + bitmap_clear (visited); } vuse = gimple_vuse (def_stmt); }