From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 30803 invoked by alias); 24 Sep 2013 15:18:59 -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 30769 invoked by uid 48); 24 Sep 2013 15:18:56 -0000 From: "paolo.carlini at oracle dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/58520] GCC fails to vectorize loop Date: Tue, 24 Sep 2013 15:18:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 4.9.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: paolo.carlini at oracle dot com X-Bugzilla-Status: RESOLVED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: 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: 2013-09/txt/msg01714.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58520 --- Comment #3 from Paolo Carlini --- By the way, I think that saying which specific command line options you are using is *much* more important than providing CPU brand and model, because the optimizers do not magically divine what you hardware exactly supports (like, eg, availability of vector instructions, etc) just assume by default a very outdated Pentium-class CPU. Sorry, I pointed out something obvious, but somebody may find it useful to know.