From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 7085 invoked by alias); 10 Sep 2004 00:00:31 -0000 Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-owner@gcc.gnu.org Received: (qmail 7034 invoked from network); 10 Sep 2004 00:00:27 -0000 Received: from unknown (HELO rwcrmhc11.comcast.net) (204.127.198.35) by sourceware.org with SMTP; 10 Sep 2004 00:00:27 -0000 Received: from lucon.org ([24.6.212.230]) by comcast.net (rwcrmhc11) with ESMTP id <20040910000027013004scpde>; Fri, 10 Sep 2004 00:00:27 +0000 Received: by lucon.org (Postfix, from userid 1000) id 027C563F4E; Thu, 9 Sep 2004 17:00:27 -0700 (PDT) Date: Fri, 10 Sep 2004 00:22:00 -0000 From: "H. J. Lu" To: gcc@gcc.gnu.org Subject: Redundant instructions in loop optimization for x86-64? Message-ID: <20040910000026.GA25099@lucon.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4.1i X-SW-Source: 2004-09/txt/msg00553.txt.bz2 It seems that gcc 3.4 and 4.0 generate redundant instructions in loop optimization for x86-64: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17387 Does anyone know why? H.J.