From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17221 invoked by alias); 23 Apr 2012 10:27:19 -0000 Received: (qmail 17201 invoked by uid 22791); 23 Apr 2012 10:27:18 -0000 X-SWARE-Spam-Status: No, hits=-4.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED,TW_CP X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 23 Apr 2012 10:27:06 +0000 From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/53081] memcpy/memset loop recognition Date: Mon, 23 Apr 2012 10:27:00 -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-Keywords: missed-optimization 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: Keywords Status Last reconfirmed CC Component Version Ever Confirmed 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: 2012-04/txt/msg01916.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53081 Richard Guenther changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |missed-optimization Status|UNCONFIRMED |NEW Last reconfirmed| |2012-04-23 CC| |rguenth at gcc dot gnu.org Component|middle-end |tree-optimization Version|unknown |4.8.0 Ever Confirmed|0 |1 --- Comment #8 from Richard Guenther 2012-04-23 10:26:45 UTC --- clearing recognition is enabled by default at -O2+ with -ftree-loop-distribute-patterns. I agree more general memset handling would be nice, as well as memcpy and memmove recognition.