From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21001 invoked by alias); 30 Jun 2012 11:27:14 -0000 Received: (qmail 20991 invoked by uid 22791); 30 Jun 2012 11:27:13 -0000 X-SWARE-Spam-Status: No, hits=-4.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED,TW_AV 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; Sat, 30 Jun 2012 11:27:02 +0000 From: "Joost.VandeVondele at mat dot ethz.ch" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/51179] poor vectorization on interlagos. Date: Sat, 30 Jun 2012 11:27:00 -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-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: Joost.VandeVondele at mat dot ethz.ch X-Bugzilla-Status: NEW 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: 2012-06/txt/msg02009.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51179 --- Comment #11 from Joost VandeVondele 2012-06-30 11:26:59 UTC --- It looks like this problem is solved in the current 4.7 and 4.8 branches. At least on an avx machine, the best performance found by the code in comment #4 jumps from 5.3Gflops in 4.6 to 13.9Glfops in 4.7/4.8. Great work. I can't test this right now on interlagos, but I guess this could be OK as well.