From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 56B153858C83; Mon, 29 Aug 2022 08:26:47 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 56B153858C83 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1661761607; bh=L7ZgumaEWikaflLPX4fDKQ5BPALmuSUdmnIltA9Rm80=; h=From:To:Subject:Date:In-Reply-To:References:From; b=AMurn09bH+YRYwzpcA7BiZUbV7vhp60HytLNt7uJL/xcCe1tVSbjHKANtAYU7CNMx Fhab5eR+lfDumJIGgyX8HVX5GocEGSxKqQxSTLOxcWKetm8VQ0MgUM7XPI1Dv1JAoh ajeQjgygcI1fA0axQU0dusCWMgOBPGh/2ruILxTo= From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/106757] [12/13 Regression] Incorrect "writing 1 byte into a region of size 0" on a vectorized loop Date: Mon, 29 Aug 2022 08:26:45 +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: 12.2.0 X-Bugzilla-Keywords: diagnostic X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth 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: 12.3 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 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106757 --- Comment #2 from Richard Biener --- The unroller has code to put unreachable()s in paths like those but it's imperfect.=