From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 28361 invoked by alias); 8 Sep 2012 22:29:36 -0000 Received: (qmail 28349 invoked by uid 22791); 8 Sep 2012 22:29:34 -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; Sat, 08 Sep 2012 22:29:18 +0000 From: "luto at mit dot edu" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/54021] [c++0x] __builtin_constant_p should be constexpr Date: Sat, 08 Sep 2012 22:29:00 -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: enhancement X-Bugzilla-Who: luto at mit dot edu X-Bugzilla-Status: RESOLVED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.8.0 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 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: 2012-09/txt/msg00684.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54021 --- Comment #6 from Andy Lutomirski 2012-09-08 22:29:17 UTC --- I think that's correct. x isn't a standards-mandated constant expression, so __builtin_constant_p depends on optimization level and probably shouldn't be allowed as a constexpr.