From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 106884 invoked by alias); 17 Mar 2015 21:29:57 -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 Received: (qmail 106850 invoked by uid 48); 17 Mar 2015 21:29:54 -0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug fortran/65450] [4.9/5 Regression]: Unaligned access with -O3 -mtune=k8 Date: Tue, 17 Mar 2015 21:29:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: fortran X-Bugzilla-Version: 5.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.9.3 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: attachments.created Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2015-03/txt/msg01724.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65450 --- Comment #13 from Jakub Jelinek --- Created attachment 35047 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35047&action=edit gcc5-pr65450.patch Fix that passed bootstrap/regtest on x86_64-linux and i686-linux. It is I think conservatively correct, on the other side we don't have any ccp pass after vectorization that could recompute that info, only vrp2 which doesn't do zero bits computation, so perhaps we should try harder.