From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27318 invoked by alias); 23 Jan 2015 19:15:01 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 27185 invoked by uid 48); 23 Jan 2015 19:14:35 -0000 From: "rth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/64739] Spurious "array subscript is above array bounds" warning Date: Fri, 23 Jan 2015 19:15:00 -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: unknown X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: rth at gcc dot gnu.org X-Bugzilla-Status: NEW 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: bug_status cf_reconfirmed_on cc everconfirmed Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2015-01/txt/msg02610.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64739 Richard Henderson changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2015-01-23 CC| |rth at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from Richard Henderson --- This seems to be related to induction variable elimination in some way, because the VR for the offending unrolled iteration is [4,10]. Which is clearly silly.