From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id BE12D388A035; Wed, 7 Apr 2021 12:30:22 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org BE12D388A035 From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/99954] [8/9/10 Regression] Copy loop over array of unions at -O3 generates memcpy instead of memmove, resulting in incorrect code Date: Wed, 07 Apr 2021 12:30:22 +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: 10.2.0 X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org X-Bugzilla-Target-Milestone: 8.5 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cf_known_to_work short_desc 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: Wed, 07 Apr 2021 12:30:22 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99954 Richard Biener changed: What |Removed |Added ---------------------------------------------------------------------------- Known to work| |11.0 Summary|[8/9/10/11 Regression] Copy |[8/9/10 Regression] Copy |loop over array of unions |loop over array of unions |at -O3 generates memcpy |at -O3 generates memcpy |instead of memmove, |instead of memmove, |resulting in incorrect code |resulting in incorrect code --- Comment #6 from Richard Biener --- Fixed on trunk sofar.=