From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21949 invoked by alias); 18 Dec 2003 19:52:18 -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 21938 invoked by uid 48); 18 Dec 2003 19:52:18 -0000 Date: Thu, 18 Dec 2003 20:12:00 -0000 Message-ID: <20031218195218.21936.qmail@sources.redhat.com> From: "ebotcazou at gcc dot gnu dot org" To: gcc-bugs@gcc.gnu.org In-Reply-To: <20031218033126.13424.danglin@gcc.gnu.org> References: <20031218033126.13424.danglin@gcc.gnu.org> Reply-To: gcc-bugzilla@gcc.gnu.org Subject: [Bug optimization/13424] [3.4 Regression] gcc.dg/20031202-1.c is miscompiled X-Bugzilla-Reason: CC X-SW-Source: 2003-12/txt/msg01951.txt.bz2 List-Id: ------- Additional Comments From ebotcazou at gcc dot gnu dot org 2003-12-18 19:52 ------- It's a regression on mainline, at least on SPARC: we have a testcase that passed before the patch and doesn't after. But I don't see the bug on the 3.3 branch, because RTX_UNCHANGING_P is not set anymore at all: before Jakub's patch, the situation was (1,1) on mainline and (0,1) on branch, so the two MEMs were detected as aliasing on mainline and not on branch. After Jakub's patch, the situation is (1,0) on mainline and (0,0) on branch, so the two MEMs are detected as aliasing on branch but not on mainline. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13424