From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21365 invoked by alias); 11 Mar 2014 13:44:40 -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 21318 invoked by uid 48); 11 Mar 2014 13:44:32 -0000 From: "glisse at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/58195] Missed optimization opportunity when returning a conditional Date: Tue, 11 Mar 2014 13:44:00 -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: 4.7.2 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: enhancement X-Bugzilla-Who: glisse 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-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: 2014-03/txt/msg00893.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58195 --- Comment #3 from Marc Glisse --- This looks like the unary version of: http://gcc.gnu.org/ml/gcc-patches/2014-03/msg00014.html and something that could be auto-generated from a pattern like: (cond (ne @0 0) (negate @0) 0) -> (negate @0) ;-)