From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13175 invoked by alias); 3 Feb 2011 18:21:03 -0000 Received: (qmail 13162 invoked by uid 22791); 3 Feb 2011 18:21:02 -0000 X-SWARE-Spam-Status: No, hits=-2.6 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 03 Feb 2011 18:20:59 +0000 From: "spop at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/46194] [4.5/4.6 Regression] gcc.dg/graphite/block-0.c FAILs with -ftree-parallelize-loops X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: spop at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: spop at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.5.3 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Thu, 03 Feb 2011 18:21:00 -0000 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: 2011-02/txt/msg00537.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46194 --- Comment #8 from Sebastian Pop 2011-02-03 18:20:56 UTC --- The problem seems to be in analyze_miv_subscript where I see this note: /* FIXME: This is a MIV subscript, not yet handled. Example: (A[{1, +, 1}_1] vs. A[{1, +, 1}_2]) that comes from (A[i] vs. A[j]). In the SIV test we had to solve a Diophantine equation with two variables. In the MIV case we have to solve a Diophantine equation with 2*n variables (if the subscript uses n IVs). */