From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 13683 invoked by alias); 15 May 2014 10:01:47 -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 13618 invoked by uid 55); 15 May 2014 10:01:44 -0000 From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/61158] negative shift at fold-const.c:12095 Date: Thu, 15 May 2014 10:01:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Version: 4.9.1 X-Bugzilla-Keywords: X-Bugzilla-Severity: minor X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: jakub 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: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2014-05/txt/msg01358.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61158 --- Comment #5 from Jakub Jelinek --- Author: jakub Date: Thu May 15 10:01:11 2014 New Revision: 210467 URL: http://gcc.gnu.org/viewcvs?rev=210467&root=gcc&view=rev Log: PR tree-optimization/61158 * fold-const.c (fold_binary_loc): If X is zero-extended and shiftc >= prec, make sure zerobits is all ones instead of invoking undefined behavior. * gcc.dg/pr61158.c: New test. Added: trunk/gcc/testsuite/gcc.dg/pr61158.c Modified: trunk/gcc/ChangeLog trunk/gcc/fold-const.c trunk/gcc/testsuite/ChangeLog