From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20875 invoked by alias); 3 Mar 2011 20:36:43 -0000 Received: (qmail 20866 invoked by uid 22791); 3 Mar 2011 20:36:42 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 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; Thu, 03 Mar 2011 20:36:38 +0000 From: "xiaofengguo at google dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/47979] Problem in comparing integers X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: rtl-optimization X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: xiaofengguo at google dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- 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 Date: Thu, 03 Mar 2011 20:36:00 -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 X-SW-Source: 2011-03/txt/msg00340.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47979 --- Comment #1 from Xiaofeng Guo 2011-03-03 20:36:32 UTC --- Because I can't find the attachment in the thread, add the text below for debugging easily. ================================================== #include #include int main() { const char *str = "1234567"; int hash = 17; for (int i = 0; i < strlen(str); ++i) { hash = 37 * hash + str[i]; } printf("hash = %d, %d\n", hash, hash < 0); int result = (hash < 0) ? (-hash) : hash; printf("result = %d\n", result); return 0; } ===================================================