From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15127 invoked by alias); 16 Jul 2013 02:29:18 -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 12853 invoked by uid 48); 16 Jul 2013 02:27:14 -0000 From: "spop at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/14741] graphite with loop blocking and interchanging doesn't optimize a matrix multiplication loop Date: Tue, 16 Jul 2013 02:29:00 -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: tree-ssa X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: enhancement X-Bugzilla-Who: spop at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 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: 2013-07/txt/msg00759.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14741 --- Comment #20 from Sebastian Pop --- -floop-nest-optimize does not have a cost model and so it blocks all loop nests. These two stmts are blocked: A=0.1D0 B=0.1D0 This other stmt is not blocked: C(I,J)=C(I,J)+A(I,K)*B(K,J) The only thing we can get from the dump file for this stmt is: number of SCoPs: 0 most likely scop detection did not like something in that loop nest.