From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 11782 invoked by alias); 15 Feb 2005 23:42:32 -0000 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 Received: (qmail 11746 invoked by uid 48); 15 Feb 2005 23:42:26 -0000 Date: Wed, 16 Feb 2005 06:33:00 -0000 Message-ID: <20050215234226.11744.qmail@sourceware.org> From: "pinskia at gcc dot gnu dot org" To: gcc-bugs@gcc.gnu.org In-Reply-To: <20050215225352.19988.stevenj@fftw.org> References: <20050215225352.19988.stevenj@fftw.org> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug middle-end/19988] [4.0 Regression] pessimizes fp multiply-add/subtract combo X-Bugzilla-Reason: CC X-SW-Source: 2005-02/txt/msg01691.txt.bz2 List-Id: ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-15 23:42 ------- Almost want to say this is caused by: 2004-07-11 Roger Sayle * fold-const.c (fold) : Canonicalize X + -C as X - C for floating point additions, to keep real immediate constant positive. : For floating point subtractions, only transform X - -C into X + C, and leave positive real constants as X - C. http://gcc.gnu.org/ml/gcc-patches/2004-07/msg01155.html Confirmed. -- What |Removed |Added ---------------------------------------------------------------------------- CC| |roger at eyesopen dot com Severity|normal |minor Status|UNCONFIRMED |NEW Ever Confirmed| |1 Last reconfirmed|0000-00-00 00:00:00 |2005-02-15 23:42:25 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19988