From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id D7BAC393BC14; Tue, 5 Jan 2021 19:00:36 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D7BAC393BC14 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/98508] Sanitizer disable -Wall and -Wextra Date: Tue, 05 Jan 2021 19:00:36 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Version: 10.2.0 X-Bugzilla-Keywords: diagnostic X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: NEW 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: Tue, 05 Jan 2021 19:00:36 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98508 --- Comment #4 from Jakub Jelinek --- It is not simple at all. While the ifns don't modify the references variab= le, they do modify the corresponding shadow memory, which is something GCC alia= sing oracle doesn't track at all, so by supplying detailed fnspec about the ifns there is a very high risk it will start miscompiling things. I have tried it in the past, and it just didn't work.=