From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1193 invoked by alias); 15 Aug 2014 09:29:37 -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 1086 invoked by uid 48); 15 Aug 2014 09:29:31 -0000 From: "glisse at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/13962] [tree-ssa] make "fold" use alias information to optimize pointer comparisons Date: Fri, 15 Aug 2014 09:29:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: tree-ssa X-Bugzilla-Keywords: alias, missed-optimization, xfail X-Bugzilla-Severity: enhancement X-Bugzilla-Who: glisse at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-08/txt/msg01047.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=13962 Marc Glisse changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |glisse at gcc dot gnu.org --- Comment #10 from Marc Glisse --- (In reply to Richard Biener from comment #9) > Created attachment 33336 [details] > patch > > Like this - does it help the particular case? _S_empty_rep_storage has DECL_WEAK, so it doesn't help here :-(