From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20877 invoked by alias); 25 Mar 2013 11:03:42 -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 20834 invoked by uid 48); 25 Mar 2013 11:03:36 -0000 From: "hubicka at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/55278] [4.8/4.9 Regression] Botan performance regressions apparently due to LRA Date: Mon, 25 Mar 2013 11:03:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: rtl-optimization X-Bugzilla-Keywords: missed-optimization, ra X-Bugzilla-Severity: normal X-Bugzilla-Who: hubicka 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: 4.8.1 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 X-SW-Source: 2013-03/txt/msg01753.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55278 --- Comment #2 from Jan Hubicka 2013-03-25 11:03:36 UTC --- Yep, Botan tends to be very random, see our benchmarks. I looked into some of the loops and they are very tight written in a bit particular way, so a lot of performance changes are really by a chance. Some better analysis would be desirable however.