Mercurial > hg > graal-compiler
view test/compiler/loopopts/TestDeadBackbranchArrayAccess.java @ 21298:7e72615e0441
Merge
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Mon, 11 May 2015 17:56:16 -0700 |
parents | 5b8e0f84f00f |
children |
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/* * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ /** * @test * @bug 8054478 * @summary dead backbranch in main loop results in erroneous array access * @run main/othervm -XX:CompileOnly=TestDeadBackbranchArrayAccess -Xcomp TestDeadBackbranchArrayAccess * */ public class TestDeadBackbranchArrayAccess { static char[] pattern0 = {0}; static char[] pattern1 = {1}; static void test(char[] array) { if (pattern1 == null) return; int i = 0; int pos = 0; char c = array[pos]; while (i >= 0 && (c == pattern0[i] || c == pattern1[i])) { i--; pos--; if (pos != -1) { c = array[pos]; } } } public static void main(String[] args) { for (int i = 0; i < 1000000; i++) { test(new char[1]); } } }