From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 9976 invoked by alias); 18 Jan 2008 02:46:34 -0000 Received: (qmail 9856 invoked by uid 48); 18 Jan 2008 02:45:51 -0000 Date: Fri, 18 Jan 2008 03:21:00 -0000 Message-ID: <20080118024551.9855.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug c/34841] 'make check' of libsndfile-1.0.17 fails with gcc-4.2.2 -O2 optimization, OK with -O1 one In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "ismail at pardus dot org dot tr" 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: 2008-01/txt/msg01883.txt.bz2 ------- Comment #9 from ismail at pardus dot org dot tr 2008-01-18 02:45 ------- File lossy_comp_test.c starting line 761 : sum_abs = abs (sum_abs + abs (abs (data [k]) - 256)) ; if (sum_abs < 1.0) { printf ("\n\nLine %d: Signal is all zeros (%d, 0x%X).\n", __LINE__, sum_abs, sum_abs) ; exit (1) ; } ; sum_abs gets a value of -27260928 . Making sum_abs unsigned fixes the problem. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34841