From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1540 invoked by alias); 22 Nov 2011 21:04:13 -0000 Received: (qmail 1530 invoked by uid 22791); 22 Nov 2011 21:04:12 -0000 X-SWARE-Spam-Status: No, hits=-2.9 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; Tue, 22 Nov 2011 21:03:56 +0000 From: "dominiq at lps dot ens.fr" To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/51267] loop optimization error using LOC function Date: Tue, 22 Nov 2011 21:34:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: fortran X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: dominiq at lps dot ens.fr X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- 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 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: 2011-11/txt/msg02257.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51267 --- Comment #4 from Dominique d'Humieres 2011-11-22 21:03:51 UTC --- > -fno-tree-ds seems to do the trick: sorry, it is -fno-tree-dse and > -ftree-dse > Perform dead store elimination (DSE) on trees. A dead store is a store into a memory location > which will later be overwritten by another store without any intervening loads. > In this case the earlier store can be deleted. This flag is enabled by default at -O and higher. (it makes more sense;-).