From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27237 invoked by alias); 5 May 2014 11:56:33 -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 27192 invoked by uid 48); 5 May 2014 11:56:30 -0000 From: "glisse at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/61034] Optimizing takes too many passes Date: Mon, 05 May 2014 11:56:00 -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: 4.10.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: glisse at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: rguenth 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: 2014-05/txt/msg00263.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61034 --- Comment #5 from Marc Glisse --- (In reply to Richard Biener from comment #4) > you might want to check whether that improves things and point me to stuff > that is left (FRE related). The fre2 dump looks much nicer (the .optimized dump is a bit surprising, I would need more time to look at it). It is not sufficient, but it clearly helps. In the fre2 dump, I still see (skipping many lines, I may have skipped some essential ones): D.2325.o = _4; D.2325.o = _101; _105 = _4; __builtin_free (_105); _96 = D.2325.o; (instead of _96 = _101)