From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 18418 invoked by alias); 16 Jan 2015 09:34:41 -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 18343 invoked by uid 48); 16 Jan 2015 09:34:36 -0000 From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug ipa/62016] [4.8/4.9 Regression] very slow compilation at -O3 on x86_64-linux-gnu Date: Fri, 16 Jan 2015 09:34:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: ipa X-Bugzilla-Version: 5.0 X-Bugzilla-Keywords: compile-time-hog X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: hubicka at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.8.5 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cf_known_to_work short_desc cf_known_to_fail 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: 2015-01/txt/msg01464.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62016 Richard Biener changed: What |Removed |Added ---------------------------------------------------------------------------- Known to work| |5.0 Summary|[4.8/4.9/5 Regression] very |[4.8/4.9 Regression] very |slow compilation at -O3 on |slow compilation at -O3 on |x86_64-linux-gnu |x86_64-linux-gnu Known to fail| |4.8.3, 4.9.2 --- Comment #10 from Richard Biener --- Yep. > /usr/bin/time gcc-4.7 t.c -O3 0.10user 0.02system 0:00.62elapsed 21%CPU (0avgtext+0avgdata 15704maxresident)k 26080inputs+48outputs (113major+9177minor)pagefaults 0swaps > /usr/bin/time gcc-4.8 t.c -O3 ^C 0.00user 0.00system 6:11.40elapsed 0%CPU (0avgtext+0avgdata 1136maxresident)k 1440inputs+0outputs (7major+331minor)pagefaults 0swaps > /usr/bin/time gcc-4.9 t.c -O3 3.13user 0.18system 0:03.84elapsed 86%CPU (0avgtext+0avgdata 404088maxresident)k 28400inputs+48outputs (128major+137978minor)pagefaults 0swaps > /usr/bin/time /space/rguenther/install/gcc-5.0/bin/gcc t.c -O3 0.04user 0.01system 0:00.28elapsed 20%CPU (0avgtext+0avgdata 13364maxresident)k 6376inputs+48outputs (17major+8570minor)pagefaults 0swaps