From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id ED9AD3857B8A; Sat, 18 Jun 2022 05:21:18 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org ED9AD3857B8A From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/106020] Spurious warnings about stringop overflows only with LTO Date: Sat, 18 Jun 2022 05:21:18 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 12.1.0 X-Bugzilla-Keywords: diagnostic, lto X-Bugzilla-Severity: normal X-Bugzilla-Who: pinskia at gcc dot gnu.org 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: Sat, 18 Jun 2022 05:21:19 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106020 --- Comment #4 from Andrew Pinski --- I suspect it is warning on some unreachable code which is not optimized away until later. Until a full testcase is attached, it is going to be hard. Als= o it would be better if not using cmake, just use a makefile if needed or just a normal shell script to describe how to compile the files (cmake adds so much stuff to it is sometimes hard to tell if it is doing the right thing).=