From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2772 invoked by alias); 6 Feb 2008 09:01:27 -0000 Received: (qmail 2661 invoked by uid 48); 6 Feb 2008 09:00:42 -0000 Date: Wed, 06 Feb 2008 09:01:00 -0000 Message-ID: <20080206090042.2660.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug target/23322] [4.1/4.2/4.3 regression] performance regression In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "steven 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: 2008-02/txt/msg00636.txt.bz2 ------- Comment #23 from steven at gcc dot gnu dot org 2008-02-06 09:00 ------- The IS_STACK_MODE trick is mine, and if this affects SSE code generation, the bug is that IS_STACK_MODE returns true for registers that will not go on the stack. I acknowledge the IS_STACK_MODE is a big hammer, but we tested extensively before committing it. We have no easy way to know if any registers are carried over the loop. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23322