From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 6691 invoked by alias); 2 Aug 2011 08:38:14 -0000 Received: (qmail 6681 invoked by uid 22791); 2 Aug 2011 08:38:13 -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, 02 Aug 2011 08:38:00 +0000 From: "rguenther at suse dot de" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/49006] [4.6/4.7 Regression] Missed vectorization due to revision 167531 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: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenther at suse dot de X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.6.2 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: Tue, 02 Aug 2011 08:38:00 -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: 2011-08/txt/msg00133.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49006 --- Comment #8 from rguenther at suse dot de 2011-08-02 08:37:28 UTC --- On Mon, 1 Aug 2011, irar at il dot ibm.com wrote: > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49006 > > --- Comment #7 from Ira Rosen 2011-08-01 14:47:08 UTC --- > I think that this is not really a missed-optimization. It's just that some > loops disappear because of the unrolling. Ah, ok - so SLP vectorization won't print a "vectorized loop X" if it would vectorize the unrolled variant? (not sure if it easily could)