From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20968 invoked by alias); 3 Nov 2009 10:48:19 -0000 Received: (qmail 20841 invoked by uid 48); 3 Nov 2009 10:48:06 -0000 Date: Tue, 03 Nov 2009 10:48:00 -0000 Message-ID: <20091103104806.20840.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug tree-optimization/41919] [4.5 Regression] optimized code with -O2 or -O3 gives strange result In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "rguenth 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: 2009-11/txt/msg00154.txt.bz2 ------- Comment #1 from rguenth at gcc dot gnu dot org 2009-11-03 10:48 ------- It's VRP which does si1_12: [-104, -104] Folding statement: if (si1_12 > 0) Simplified relational if (si1_12 > 0) into if (si1_12 == -104) uh. -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Component|c |tree-optimization Ever Confirmed|0 |1 Keywords| |wrong-code Known to work| |4.4.2 Last reconfirmed|0000-00-00 00:00:00 |2009-11-03 10:48:06 date| | Summary|optimized code with -O2 or -|[4.5 Regression] optimized |O3 gives strange result |code with -O2 or -O3 gives | |strange result Target Milestone|--- |4.5.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41919