From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 20818 invoked by alias); 19 Feb 2012 08:01:18 -0000 Received: (qmail 20806 invoked by uid 22791); 19 Feb 2012 08:01:17 -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; Sun, 19 Feb 2012 08:01:05 +0000 From: "tkoenig at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/52307] Segmentation fault in Lapack with -O3 -floop-flatten -floop-strip-mine Date: Sun, 19 Feb 2012 09:33:00 -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-Keywords: wrong-code X-Bugzilla-Severity: critical X-Bugzilla-Who: tkoenig at gcc dot gnu.org 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: Severity 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: 2012-02/txt/msg01875.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52307 Thomas Koenig changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |critical --- Comment #1 from Thomas Koenig 2012-02-19 08:00:36 UTC --- There are many more bugs. This occurs with xlintsts < stest.in and (using the debugger) the segfault is Program received signal SIGSEGV, Segmentation fault. 0x00000000100b2bd0 in spbtrf (uplo='\000', n=0, kd=0, ab=..., ldab=0, info=0, _uplo=) at spbtrf.f:336 336 WORK( I, J ) = ZERO SUBROUTINE SPBTRF( UPLO, N, KD, AB, LDAB, INFO ) * * -- LAPACK computational routine (version 3.4.0) -- * -- LAPACK is a software package provided by Univ. of Tennessee, -- * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- * November 2011 * * .. Scalar Arguments .. CHARACTER UPLO INTEGER INFO, KD, LDAB, N * .. * .. Array Arguments .. REAL AB( LDAB, * ) * .. * * ===================================================================== * * .. Parameters .. REAL ONE, ZERO PARAMETER ( ONE = 1.0E+0, ZERO = 0.0E+0 ) INTEGER NBMAX, LDWORK PARAMETER ( NBMAX = 32, LDWORK = NBMAX+1 ) * .. * .. Local Scalars .. INTEGER I, I2, I3, IB, II, J, JJ, NB * .. * .. Local Arrays .. REAL WORK( LDWORK, NBMAX ) ... * Zero the lower triangle of the work array. * DO 90 J = 1, NB DO 80 I = J + 1, NB WORK( I, J ) = ZERO 80 CONTINUE 90 CONTINUE Trying to reduce this further.