From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 8557 invoked by alias); 21 Dec 2010 14:45:35 -0000 Received: (qmail 8532 invoked by uid 22791); 21 Dec 2010 14:45:35 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_UF 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; Tue, 21 Dec 2010 14:45:30 +0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/46880] [4.4/4.5/4.6 Regression] generating of shufpd is broken X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: jakub at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.6.0 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 Date: Tue, 21 Dec 2010 14:45:00 -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 X-SW-Source: 2010-12/txt/msg02429.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46880 --- Comment #4 from Jakub Jelinek 2010-12-21 14:45:08 UTC --- Created attachment 22836 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22836 gcc46-pr46880.patch Untested fix. In both of these insns, for the shufpd $2 alternative %2 operand uses constraint 0 while %1 operand uses constraint x. So, using shuftpd $2, %2, %0 looks wrong, because that will never look at the other operand, shuftpd $2, %0, %0 is IMHO a nop.