From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20596 invoked by alias); 13 Jan 2009 14:29:14 -0000 Received: (qmail 20333 invoked by alias); 13 Jan 2009 14:29:00 -0000 Date: Tue, 13 Jan 2009 14:29:00 -0000 Message-ID: <20090113142900.20332.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug tree-optimization/38401] TreeSSA-PRE load after store missed optimization In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "rguenther at suse dot de" 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: 2009-01/txt/msg01339.txt.bz2 ------- Comment #22 from rguenther at suse dot de 2009-01-13 14:29 ------- Subject: Re: TreeSSA-PRE load after store missed optimization On Tue, 13 Jan 2009, amylaar at gcc dot gnu dot org wrote: > ------- Comment #21 from amylaar at gcc dot gnu dot org 2009-01-13 14:11 ------- > (In reply to comment #20) > > office: 1.39% worse > > Actually, this is the EEMBC version with bezier01, where the entire benchmark > gets optized away and thus tiny changes in the cost of the set-up code make > noticeable differences. Comparing the geometric means with bezier01 left out > gives: > > automotive: 5.73% improvement > consumer: 0.04% improvement > networking: 0.37% improvement > office: 0.90% worse > telecom: 0.00% worse If you post a patch to add the option to enable/disable partial-PRE I will happily review and approve it for 4.4. Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38401