From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 458FE386186E; Fri, 4 Dec 2020 14:10:21 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 458FE386186E From: "barry.revzin at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/98142] fstrict-enums optimization applied only for unscoped enums with unfixed underlying type Date: Fri, 04 Dec 2020 14:10:21 +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: 10.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: barry.revzin at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: 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: 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: Fri, 04 Dec 2020 14:10:21 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98142 --- Comment #2 from Barry Revzin --- That is a great point. I guess in general this is kind of a scary optimization, since it doesn't s= eem like it's really a global thing? Perhaps this calls for an attribute? [[gnu::i_promise_on_penalty_of_ub_that_only_these_values_are_used]] enum class E : unsigned int { A, B, C, D }; Or, you know, [[gnu::strict_enum]] or something.=