From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21633 invoked by alias); 23 Dec 2011 05:44:07 -0000 Received: (qmail 21602 invoked by uid 22791); 23 Dec 2011 05:44:06 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_JY 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; Fri, 23 Dec 2011 05:43:53 +0000 From: "jye2 at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/43491] Unnecessary temporary for global register variable Date: Fri, 23 Dec 2011 06:32:00 -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, ra X-Bugzilla-Severity: enhancement X-Bugzilla-Who: jye2 at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- 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: 2011-12/txt/msg02520.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43491 --- Comment #6 from jye2 at gcc dot gnu.org 2011-12-23 05:43:17 UTC --- Author: jye2 Date: Fri Dec 23 05:43:09 2011 New Revision: 182650 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182650 Log: 2011-12-22 Bin Cheng Richard Guenther PR tree-optimization/43491 * tree-ssa-pre.c (eliminate): Don't replace global register variable when it is the RHS of a single assign. testsuite: * gcc.dg/tree-ssa/pr43491.c: New test. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/pr43491.c Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-ssa-pre.c