/* * Copyright (c) 2024, Red Hat, Inc. 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 8308660 * @summary C2 compilation hits 'node must be dead' assert * @requires vm.compiler2.enabled * @run main/othervm -XX:-BackgroundCompilation -XX:-TieredCompilation -XX:-UseOnStackReplacement * -XX:+UnlockDiagnosticVMOptions -XX:+StressIGVN -XX:StressSeed=242006623 TestFoldIfRemovesTopNode * @run main/othervm -XX:-BackgroundCompilation -XX:-TieredCompilation -XX:-UseOnStackReplacement * -XX:+UnlockDiagnosticVMOptions -XX:+StressIGVN TestFoldIfRemovesTopNode * */ public class TestFoldIfRemovesTopNode { public static void main(String[] args) { int[] array = new int[100]; for (int i = 0; i < 20_000; i++) { test(false, true, 0, array); test(false, false, 0, array); testHelper2(false, false, 0, array); testHelper(0, true, array); } } private static void test(boolean flag, boolean flag2, int k, int[] array) { if (flag2) { testHelper2(flag, flag2, k, array); } } private static void testHelper2(boolean flag, boolean flag2, int k, int[] array) { if (flag2) { k = -1; } testHelper(k, flag, array); } private static void testHelper(int k, boolean flag, int[] array) { if (flag) { k = new int[k].length; int j = k + 3; if (j >= 0 && j <= array.length) { } } } }