1 /* 2 * Copyright (c) 2018, Red Hat, Inc. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /** 25 * @test 26 * @bug 8201368 27 * @summary IfNode::fold_compares() may lead to incorrect execution 28 * 29 * @run main/othervm -XX:-TieredCompilation -XX:-UseOnStackReplacement -XX:-BackgroundCompilation FoldedIfNonDomMidIf 30 * 31 */ 32 33 public class FoldedIfNonDomMidIf { main(String[] args)34 public static void main(String[] args) { 35 for (int i = 0; i < 20_000; i++) { 36 test_helper(0, 0); 37 test_helper(20, 0); 38 test(12); 39 } 40 if (test(14) != null) { 41 throw new RuntimeException("Incorrect code execution"); 42 } 43 } 44 test(int i)45 private static Object test(int i) { 46 return test_helper(i, 0x42); 47 } 48 49 static class A { 50 51 } 52 53 static final MyException myex = new MyException(); 54 test_helper(int i, int j)55 private static Object test_helper(int i, int j) { 56 Object res = null; 57 try { 58 if (i < 10) { 59 throw myex; 60 } 61 62 if (i == 14) { 63 64 } 65 66 if (i > 15) { 67 throw myex; 68 } 69 } catch (MyException e) { 70 if (j == 0x42) { 71 res = new A(); 72 } 73 } 74 return res; 75 } 76 77 private static class MyException extends Exception { 78 } 79 } 80