From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2371 invoked by alias); 16 Feb 2011 08:32:31 -0000 Received: (qmail 2362 invoked by uid 22791); 16 Feb 2011 08:32:31 -0000 X-SWARE-Spam-Status: No, hits=-2.7 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; Wed, 16 Feb 2011 08:32:27 +0000 From: "jiez at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/47763] Useless initialization of register X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: rtl-optimization X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jiez at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: jiez at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- 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: Wed, 16 Feb 2011 08:36:00 -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: 2011-02/txt/msg01907.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47763 --- Comment #6 from Jie Zhang 2011-02-16 08:32:14 UTC --- I think we all know that dhrystone is a bad benchmark. But some users don't. Which is more difficult: educating all users about that vs apply a simple patch in GCC to remove the useless initialization? 4.4 does has such initialization. But 4.5 has. Fixing this is an improvement and does not hurt. From another point, leaving it unfixed does not help GCC.