From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 3294 invoked by alias); 17 Apr 2012 17:52:45 -0000 Received: (qmail 3281 invoked by uid 22791); 17 Apr 2012 17:52:44 -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; Tue, 17 Apr 2012 17:51:57 +0000 From: "manu at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/51712] -Wtype-limits should not trigger for types of implementation-defined signedness Date: Tue, 17 Apr 2012 17:52:00 -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: diagnostic X-Bugzilla-Severity: enhancement X-Bugzilla-Who: manu 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: Keywords Status Last reconfirmed CC 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" Content-Transfer-Encoding: quoted-printable 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: 2012-04/txt/msg01422.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D51712 Manuel L=C3=B3pez-Ib=C3=A1=C3=B1ez changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |diagnostic Status|UNCONFIRMED |NEW Last reconfirmed| |2012-04-17 CC| |jason at gcc dot gnu.org, | |joseph at codesourcery dot | |com Ever Confirmed|0 |1 --- Comment #3 from Manuel L=C3=B3pez-Ib=C3=A1=C3=B1ez 2012-04-17 17:49:58 UTC --- Unfortunately, I cannot see any way to know that FOO is a constant that com= es from an enum. Joseph, is this possible to do in the C FE?=20 Also, constants don't have locations in GCC, so no way to know that it comes from a macro. Sorry! This a problem also in G++, but in this testcase it doesn't trigger because= arg is considered to be signed. I guess it can trigger in other testcases.