From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 18021 invoked by alias); 25 May 2007 20:32:30 -0000 Received: (qmail 17996 invoked by uid 48); 25 May 2007 20:32:16 -0000 Date: Fri, 25 May 2007 20:32:00 -0000 Message-ID: <20070525203216.17995.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug rtl-optimization/17387] Redundant instructions in loop optimization 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: 2007-05/txt/msg02269.txt.bz2 ------- Comment #22 from steven at gcc dot gnu dot org 2007-05-25 20:32 ------- With the current implementation of SEE it is almost impossible to make it work on x86. You have to take into account the liveness of the flags register, and there currently is no way to include that in the dataflow equations. Maybe someone else knows how to do this... -- steven at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|steven at gcc dot gnu dot |unassigned at gcc dot gnu |org |dot org Status|ASSIGNED |NEW http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17387