From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 51B7F3947417; Fri, 20 Mar 2020 08:58:39 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 51B7F3947417 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1584694719; bh=gOOCMkbzMHPzy7Aap6LIhdVTtDqvKUCjv0WHs/+2rso=; h=From:To:Subject:Date:In-Reply-To:References:From; b=A/O5pyDDOdg5X7+SQWvHNd+8WknEXttJrjuyOcemL/JXYN+B2lH+edvu/uCbyEeKu 5bbKfuKgD46WzvOjzY28z2RFgcwwc42YNA7bPPAX+EhBfem80ndJrkGnn0k8gs/Ihm 79Hn/agNSWQ3xDqudoG7dhTDTaeeVK+JvCCuu+BI= From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/92955] [10 regression] False positive stringop-overflow warning with vectorization and loop unrolling Date: Fri, 20 Mar 2020 08:58:38 +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: 10.0 X-Bugzilla-Keywords: diagnostic, missed-optimization 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: 10.0 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: Fri, 20 Mar 2020 08:58:39 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D92955 --- Comment #9 from Richard Biener --- Complete peeling is known of not eliminating all unreachable code which is = why -Warray-bounds now runs _before_ unrolling only. Note it's practically impossible to cover all cases in peeling but there's some that could (identified in some old PR I can't find right now).=