From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 1045D3858431; Thu, 10 Nov 2022 17:21:10 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1045D3858431 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1668100870; bh=n451DdO/kTtPyaXKF9voeBOSZ3WY42fTBeqQ1fqnpUQ=; h=From:To:Subject:Date:In-Reply-To:References:From; b=shVhXE8oWcS87ky664S+FTj8xam2L4/j7bcReFm/4dh4n3RYebQ1yx8TKVGK/WBk1 lo5pq5EG2LfMXFR7qlrhXSuX21g6Gq4xZx6y/IKYS0L7a1TjsLbQqg41dIiEL8AtAo w7skHUmr/TTurO3rnDZ0kQDLwOCJ8YN2gzhXmtOg= From: "yann at droneaud dot fr" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/107618] Incorrect diagnostics when using -Og, builtin_expect(), and function attribute "warning" or "error" Date: Thu, 10 Nov 2022 17:21:09 +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: unknown X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: yann at droneaud dot fr 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: cc 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 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107618 Yann Droneaud changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |yann at droneaud dot fr --- Comment #1 from Yann Droneaud --- A smallest reproducer (generated with some help from C-reduce): void a(void) __attribute__((__warning__(""))); int main(void) { unsigned long b =3D __builtin_object_size(0, 0); if (__builtin_expect(b < 1, 0)) a(); } Works at all level above -00, except -Og: $ gcc -Og warning.c warning.c: In function =E2=80=98main=E2=80=99: warning.c:5:5: warning: call to =E2=80=98a=E2=80=99 declared with attri= bute warning:=20 [-Wattribute-warning] 5 | a(); | ^~~=