From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 16184 invoked by alias); 13 Feb 2012 18:13:55 -0000 Received: (qmail 16175 invoked by uid 22791); 13 Feb 2012 18:13:54 -0000 X-SWARE-Spam-Status: No, hits=-2.9 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; Mon, 13 Feb 2012 18:13:42 +0000 From: "redi at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/52231] [missed optimization/diagnostics] address-of-reference Date: Mon, 13 Feb 2012 18:13:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: redi 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: Status Last reconfirmed Ever Confirmed 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: 2012-02/txt/msg01346.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52231 Jonathan Wakely changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2012-02-13 Ever Confirmed|0 |1 --- Comment #2 from Jonathan Wakely 2012-02-13 18:13:23 UTC --- But the language guarantees that for a program without undefined behaviour a reference is always bound to a valid object. int* i = nullptr; int& r = *i; // undefined if (&r == 0) // cannot be true ;