From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 16183 invoked by alias); 1 Apr 2013 13:45:50 -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 16065 invoked by uid 48); 1 Apr 2013 13:45:36 -0000 From: "glisse at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/55583] Extended shift instruction on x86-64 is not used, producing unoptimal code Date: Mon, 01 Apr 2013 13:45:00 -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: enhancement X-Bugzilla-Who: glisse 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: 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 X-SW-Source: 2013-04/txt/msg00004.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55583 --- Comment #5 from Marc Glisse 2013-04-01 13:45:33 UTC --- Created attachment 29764 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29764 Patch from comment #4 I apparently forgot to attach a patch when I posted comment #4. This is just to show the idea, it doesn't handle many cases, and the length_immediate value was randomly filled just to let it compile.