From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9314 invoked by alias); 4 Sep 2008 17:44:59 -0000 Received: (qmail 8984 invoked by uid 48); 4 Sep 2008 17:43:39 -0000 Date: Thu, 04 Sep 2008 17:44:00 -0000 Message-ID: <20080904174339.8983.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug middle-end/37364] [4.4 Regression] IRA generates ineffient code In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "hjl dot tools at gmail dot com" 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: 2008-09/txt/msg00559.txt.bz2 ------- Comment #3 from hjl dot tools at gmail dot com 2008-09-04 17:43 ------- The problem may be in IRA_COVER_CLASSES. -mtune=core2 turns on TARGET_INTER_UNIT_MOVES, which means move between mmx and 64bit integer registers is cheaper than load/store. But IRA doesn't handle it properly. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37364