From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 31701 invoked by alias); 5 Jun 2006 15:57:19 -0000 Received: (qmail 31610 invoked by uid 48); 5 Jun 2006 15:57:10 -0000 Date: Mon, 05 Jun 2006 16:03:00 -0000 Message-ID: <20060605155710.31609.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug target/27855] reassociation pass produces ~30% slower matrix multiplication code In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "dberlin at gcc dot gnu dot org" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2006-06/txt/msg00561.txt.bz2 List-Id: ------- Comment #10 from dberlin at gcc dot gnu dot org 2006-06-05 15:57 ------- (In reply to comment #9) > This thread is moving dangerously close to work in progress.. :-) > I'll have something more definitive to say about it in a few weeks, but I'm > looking at doing significant register pressure reduction at out of ssa time as > a component of a larger hunk of work. Just be careful. The last time i tried something like this, it produced good code on x86, and really crappy code everywhere else. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27855