From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 31385 invoked by alias); 24 Dec 2011 06:47:02 -0000 Received: (qmail 31334 invoked by uid 22791); 24 Dec 2011 06:47:00 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 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; Sat, 24 Dec 2011 06:46:48 +0000 From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/29776] result of ffs/clz/ctz/popcount/parity are already sign-extended Date: Sat, 24 Dec 2011 08:01:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: pinskia 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 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: 2011-12/txt/msg02580.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29776 Andrew Pinski changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |missed-optimization Status|UNCONFIRMED |NEW Last reconfirmed| |2011-12-24 Ever Confirmed|0 |1 --- Comment #1 from Andrew Pinski 2011-12-24 06:46:16 UTC --- Trying 9 -> 10: Failed to match this instruction: (set (reg:DI 69 [ D.1710 ]) (sign_extend:DI (ctz:SI (reg:SI 67 [ x ])))) Should be changed to zero_extend and then that could be matched really.