From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 8366 invoked by alias); 2 Jun 2007 00:59:06 -0000 Received: (qmail 8334 invoked by uid 48); 2 Jun 2007 00:58:58 -0000 Date: Sat, 02 Jun 2007 00:59:00 -0000 Message-ID: <20070602005858.8333.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug tree-optimization/32183] [4.3 Regression] reassoc2 can more extra calculations into a loop In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "pinskia at gcc dot gnu dot org" 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: 2007-06/txt/msg00078.txt.bz2 ------- Comment #12 from pinskia at gcc dot gnu dot org 2007-06-02 00:58 ------- Maybe someone should timings without the second reassoc. Jeff mentioned the loop optimizers cause new reassociations: http://gcc.gnu.org/ml/gcc-patches/2005-12/msg00469.html And Daniel Berlin agreed with him (but this was before a DCE was added): http://gcc.gnu.org/ml/gcc-patches/2005-12/msg00473.html -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32183