From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9103 invoked by alias); 3 Mar 2012 23:52:25 -0000 Received: (qmail 9093 invoked by uid 22791); 3 Mar 2012 23:52:24 -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; Sat, 03 Mar 2012 23:52:11 +0000 From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/21485] [4.4/4.5/4.6/4.7/4.8 Regression] missed load PRE, PRE makes i?86 suck Date: Sat, 03 Mar 2012 23:52:00 -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: pinskia 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: Depends on 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: 2012-03/txt/msg00314.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21485 Andrew Pinski changed: What |Removed |Added ---------------------------------------------------------------------------- Depends on| |32120 --- Comment #48 from Andrew Pinski 2012-03-03 23:51:36 UTC --- I noticed PR 32120 is also involved. D.1716_7 = k_4 * 8; D.1717_9 = array_8(D) + D.1716_7; D.1718_10 = *D.1717_9; k_11 = k_4 + 1; D.1720_12 = k_11 * 8; The D.1720_12 should be converted to D.1716_7 + 8.