From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21344 invoked by alias); 8 Feb 2011 14:40:40 -0000 Received: (qmail 21307 invoked by uid 22791); 8 Feb 2011 14:40:40 -0000 X-SWARE-Spam-Status: No, hits=-2.6 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_TM 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; Tue, 08 Feb 2011 14:40:35 +0000 From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/47477] [4.6 regression] Sub-optimal mov at end of method X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: rtl-optimization X-Bugzilla-Keywords: missed-optimization, ra X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth 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: 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: Tue, 08 Feb 2011 14:41:00 -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: 2011-02/txt/msg01022.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47477 --- Comment #8 from Richard Guenther 2011-02-08 14:39:25 UTC --- (In reply to comment #7) > forwprop is a forward walk, for this kind of optimization we want to walk > backwards, from the narrowing integer conversion to the operations and whenever > we change some operation see if we can change the def_stmts of its operands > too. forwprop does both, walking forward and backward today. It's just misnamed now ;)