/* * Copyright (c) 2019, Huawei Technologies Co. Ltd. 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 8231988 * @summary Unexpected test result caused by C2 IdealLoopTree::do_remove_empty_loop * * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation * TestRemoveEmptyLoop */ public class TestRemoveEmptyLoop { public void test() { int i = 34; for (; i > 0; i -= 11); if (i < 0) { // do nothing } else { throw new RuntimeException("Test failed."); } } public static void main(String[] args) { TestRemoveEmptyLoop _instance = new TestRemoveEmptyLoop(); for (int i = 0; i < 50000; i++) { _instance.test(); } System.out.println("Test passed."); } }