From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 2D2C2385801A; Mon, 21 Feb 2022 15:21:34 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2D2C2385801A From: "qing.zhao at oracle dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/104550] bogus warning from -Wuninitialized + -ftrivial-auto-var-init=pattern Date: Mon, 21 Feb 2022 15:21:34 +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: 12.0 X-Bugzilla-Keywords: diagnostic X-Bugzilla-Severity: normal X-Bugzilla-Who: qing.zhao at oracle dot com X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: qinzhao 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: Mon, 21 Feb 2022 15:21:34 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104550 --- Comment #20 from Qing Zhao --- > On Feb 21, 2022, at 1:56 AM, rguenth at gcc dot gnu.org wrote: >>=20 >> my question is, is the "info" in __builtin_clear_padding(&info) a REAL u= se >> of "info"? is it correct to report the uninitialized use message for it? >=20 > As said I think reads emitted from __builtin_clear_padding lowering should > not be considered for (uninit) diagnostics. Okay.=