From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 19714 invoked by alias); 22 Aug 2012 14:58:45 -0000 Received: (qmail 19701 invoked by uid 22791); 22 Aug 2012 14:58:43 -0000 X-SWARE-Spam-Status: No, hits=-4.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED 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; Wed, 22 Aug 2012 14:57:56 +0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/54349] _mm_cvtsi128_si64 unnecessary stores value at stack Date: Wed, 22 Aug 2012 14:58:00 -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: X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: RESOLVED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Status CC Resolution 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: 2012-08/txt/msg01541.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54349 Jakub Jelinek changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |jakub at gcc dot gnu.org Resolution| |INVALID --- Comment #1 from Jakub Jelinek 2012-08-22 14:57:54 UTC --- Not a bug. You need to tune for a CPU where inter-unit moves are desirable. The default is generic tuning, which is a compromise between Intel CPUs (where they are desirable) and AMD CPUs (where they are undesirable). In this particular case the generic tuning doesn't do inter-unit moves as part of the compromise. If you -mtune=corei7 or similar, you'll get an inter-unit move in both cases.