From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 5535 invoked by alias); 18 Dec 2010 12:29:44 -0000 Received: (qmail 5520 invoked by uid 22791); 18 Dec 2010 12:29:42 -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; Sat, 18 Dec 2010 12:29:38 +0000 From: "dcb314 at hotmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/47001] New: segmentation fault in vect_mark_slp_stmts X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: dcb314 at hotmail 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: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Sat, 18 Dec 2010 12:29:00 -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: 2010-12/txt/msg02187.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47001 Summary: segmentation fault in vect_mark_slp_stmts Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c AssignedTo: unassigned@gcc.gnu.org ReportedBy: dcb314@hotmail.com Created attachment 22808 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22808 C source code I just tried to compile package groonga-1.0.3 with the latest 4.6 snapshot 20101211 on a Fedora Linux box. The compiler said io.c: In function 'grn_io_open': io.c:402:12: warning: variable 'flags' set but not used [-Wunused-but-set-variable] io.c:397:1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See for instructions. valgrind says ==8475== Invalid read of size 4 ==8475== at 0x92FA3D: vect_mark_slp_stmts (tree-vect-slp.c:2597) ==8475== by 0x932443: vect_make_slp_decision (tree-vect-slp.c:1347) ==8475== by 0x928F80: vect_analyze_loop (tree-vect-loop.c:1497) ==8475== by 0x935647: vectorize_loops (tree-vectorizer.c:199) ==8475== by 0x74510E: execute_one_pass (passes.c:1553) ==8475== by 0x7453B4: execute_pass_list (passes.c:1608) ==8475== by 0x7453C6: execute_pass_list (passes.c:1609) ==8475== by 0x7453C6: execute_pass_list (passes.c:1609) ==8475== by 0x838CD5: tree_rest_of_compilation (tree-optimize.c:422) ==8475== by 0x9D6540: cgraph_expand_function (cgraphunit.c:1508) ==8475== by 0x9D8AA9: cgraph_optimize (cgraphunit.c:1567) ==8475== by 0x9D9019: cgraph_finalize_compilation_unit (cgraphunit.c:1031) ==8475== Address 0x4 is not stack'd, malloc'd or (recently) free'd ==8475== Source code attached. Flag -O3 required.