From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 30339 invoked by alias); 5 Dec 2011 17:59:24 -0000 Received: (qmail 30276 invoked by uid 22791); 5 Dec 2011 17:59:23 -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; Mon, 05 Dec 2011 17:59:10 +0000 From: "dominiq at lps dot ens.fr" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/50904] [4.7 regression] pessimization when -fno-protect-parens is enabled by -Ofast Date: Mon, 05 Dec 2011 17:59:00 -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: dominiq at lps dot ens.fr X-Bugzilla-Status: RESOLVED X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.7.0 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 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/msg00453.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50904 --- Comment #48 from Dominique d'Humieres 2011-12-05 17:58:13 UTC --- > Fixed (fingers crossing). So far, so good! The runtime for induct compiled with -fprotect-parens -Ofast went down from 14.11s to 13.14s, and compiled with -Ofast from 14.62s to 13.32s (still ~1% slower). The timings for the other tests in the polyhedron suite were basically unchanged (i.e., within the noise margin). Thanks for the patch.