From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27849 invoked by alias); 13 Mar 2013 09:53:34 -0000 Received: (qmail 27756 invoked by uid 48); 13 Mar 2013 09:53:06 -0000 From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/54896] optimization slowness on large basic blocks Date: Wed, 13 Mar 2013 09:53:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Keywords: alias, compile-time-hog X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth 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: --- 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: 2013-03/txt/msg01015.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54896 --- Comment #9 from Richard Biener 2013-03-13 09:53:06 UTC --- (In reply to comment #8) > With r196576 on x86_64 (gcc17): > > at -O1: > alias stmt walking : 30.99 (36%) usr > reload CSE regs : 18.94 (22%) usr > CSE : 14.94 (17%) usr > tree DSE : 9.32 (11%) usr > > at -O2: > alias stmt walking : 46.65 (30%) usr > reload CSE regs : 37.92 (25%) usr > CSE 2 : 29.09 (19%) usr > CSE : 15.02 (10%) usr > > at -O3: > tree slp vectorization : 129.79 (61%) usr > alias stmt walking : 46.52 (22%) usr I have patches for the SLP vectorization part, queued for 4.9.