From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27263 invoked by alias); 25 Jan 2012 13:20:04 -0000 Received: (qmail 27236 invoked by uid 22791); 25 Jan 2012 13:20:03 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_ZJ X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 25 Jan 2012 13:19:50 +0000 From: "ubizjak at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/51994] [4.6/4.7 Regression] git-1.7.8.3 miscompiled due to negative bitpos from get_inner_reference Date: Wed, 25 Jan 2012 13:30:00 -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-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: ubizjak at gmail dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.6.3 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 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 X-SW-Source: 2012-01/txt/msg02920.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51994 --- Comment #7 from Uros Bizjak 2012-01-25 13:19:32 UTC --- Testcase that crashes on alpha: --cut here-- extern void abort (void); char __attribute__((noinline)) test (int a) { char buf[] = "0123456789"; char *output = buf; output += a; output -= 1; return output[0]; } int main () { if (test (2) != '1') abort (); return 0; } --cut here--