From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21025 invoked by alias); 29 Sep 2014 08:17:16 -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 20945 invoked by uid 55); 29 Sep 2014 08:17:11 -0000 From: "rguenther at suse dot de" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/35545] tracer pass is run too late Date: Mon, 29 Sep 2014 08:17:00 -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-Version: 4.4.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: enhancement X-Bugzilla-Who: rguenther at suse dot de X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: hubicka 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: 2014-09/txt/msg02646.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35545 --- Comment #20 from rguenther at suse dot de --- On Fri, 26 Sep 2014, law at redhat dot com wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35545 > > --- Comment #14 from Jeffrey A. Law --- > This feels like the kind of situation where I've always wanted a pass to be > able to say something like "I've done some set of transformations", schedule > the appropriate cleanup passes to run". > > It's heavyweight, but making the tracer imply a later DOM or VRP pass might > make sense. Uh that idea will lead to very big compile-time increases. One thing I'd liked to do at some point is make the SSA propagators and/or DOM work on MEME regions so we can schedule them on a sub-CFG. Richard.