From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 12200 invoked by alias); 31 Aug 2005 16:19:51 -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 12177 invoked by uid 48); 31 Aug 2005 16:19:42 -0000 Date: Wed, 31 Aug 2005 16:23:00 -0000 Message-ID: <20050831161942.12176.qmail@sourceware.org> From: "pinskia at gcc dot gnu dot org" To: gcc-bugs@gcc.gnu.org In-Reply-To: <20050831160521.23657.qrczak@knm.org.pl> References: <20050831160521.23657.qrczak@knm.org.pl> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug tree-optimization/23657] [4.1 Regression] Wrong code generated: too much optimized out X-Bugzilla-Reason: CC X-SW-Source: 2005-08/txt/msg03626.txt.bz2 List-Id: ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-08-31 16:19 ------- Confirmed, between t41.copyrename2 and t42.dom2, the V_MAY_DEF is removed. After *next_8 = 7; Before: # TMT.51_18 = V_MAY_DEF ; *dest_2 = 7; I think we are forgetting to copy the alias info. I think this is fixed by the patch for PR 23509: http://gcc.gnu.org/ml/gcc-patches/2005-08/msg01647.html The tree-cfg.c part that is. -- What |Removed |Added ---------------------------------------------------------------------------- CC| |pinskia at gcc dot gnu dot | |org Status|UNCONFIRMED |NEW Component|c |tree-optimization Ever Confirmed| |1 GCC build triplet|i686-pc-linux-gnu | GCC host triplet|i686-pc-linux-gnu | GCC target triplet|i686-pc-linux-gnu | Keywords| |alias, wrong-code Last reconfirmed|0000-00-00 00:00:00 |2005-08-31 16:19:38 date| | Summary|Wrong code generated: too |[4.1 Regression] Wrong code |much optimized out |generated: too much | |optimized out Target Milestone|--- |4.1.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23657