From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id C9C27385483E; Thu, 24 Dec 2020 18:55:19 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C9C27385483E From: "pskocik at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/98418] Valid integer constant expressions based on expressions that trigger -Wshift-overflow are treated as non-constants Date: Thu, 24 Dec 2020 18:55:19 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Version: 6.1.0 X-Bugzilla-Keywords: rejects-valid X-Bugzilla-Severity: normal X-Bugzilla-Who: pskocik at gmail dot com X-Bugzilla-Status: RESOLVED X-Bugzilla-Resolution: INVALID X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status resolution Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Dec 2020 18:55:19 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98418 pskocik at gmail dot com changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #3 from pskocik at gmail dot com --- You're right. The bug was in my code. struct foo { unsigned bit: (0xffffffffll<<40)!=3D0; }; is indeed UB due to http://port70.net/~nsz/c/c11/n1570.html#6.5.7p4, but struct foo { unsigned bit: (0xffffffffull<<40)!=3D0; }; isn't and GCC accepts it without complaint. Apologies for the false alarm.=