From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 3209 invoked by alias); 12 Jan 2012 13:03:32 -0000 Received: (qmail 3198 invoked by uid 22791); 12 Jan 2012 13:03:31 -0000 X-SWARE-Spam-Status: No, hits=-2.9 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, 12 Jan 2012 13:03:19 +0000 From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/32306] [4.4/4.5/4.6/4.7 Regression] redundant && || not eliminated Date: Thu, 12 Jan 2012 13:03:00 -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: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.4.7 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: 2012-01/txt/msg01375.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32306 --- Comment #19 from Richard Guenther 2012-01-12 13:02:25 UTC --- Shorter testcase, compilable and to the point. We are not able to CSE the b1 && ... && b8 sequence because we produce control-flow for it during gimplification. void bar (short *array, short b1, short b2, short b3, short b4, short b5, short b6, short b7, short b8) { array[0] = b1 && b2 && b3 && b4 && b5 && b6 && b7 && b8; array[1] = b1 && b2 && b3 && b4 && b5 && b6 && b7 && b8; }