From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21528 invoked by alias); 17 Dec 2014 11:49:11 -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 21468 invoked by uid 55); 17 Dec 2014 11:49:06 -0000 From: "mpolacek at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/63568] Missed optimization (a & ~mask) | (b & mask) = a ^ ((a ^ b) & mask) Date: Wed, 17 Dec 2014 11:49:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Version: 5.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: mpolacek at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: mpolacek at gcc dot gnu.org X-Bugzilla-Target-Milestone: 5.0 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: 2014-12/txt/msg01983.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63568 --- Comment #9 from Marek Polacek --- Author: mpolacek Date: Wed Dec 17 11:48:33 2014 New Revision: 218816 URL: https://gcc.gnu.org/viewcvs?rev=218816&root=gcc&view=rev Log: PR middle-end/63568 * match.pd: Add (x & ~m) | (y & m) -> ((x ^ y) & m) ^ x pattern. * gcc.dg/pr63568.c: New test. Added: trunk/gcc/testsuite/gcc.dg/pr63568.c Modified: trunk/gcc/ChangeLog trunk/gcc/match.pd trunk/gcc/testsuite/ChangeLog