1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. 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 /** 26 * @test 27 * @bug 8069191 28 * @summary predicate moved out of loops and CastPP removal causes dependency to be lost 29 * @run main/othervm -Xcomp -XX:CompileOnly=TestPredicateLostDependency.m1 -XX:+IgnoreUnrecognizedVMOptions -XX:+StressGCM TestPredicateLostDependency 30 * 31 */ 32 33 public class TestPredicateLostDependency { 34 static class A { 35 int i; 36 } 37 38 static class B extends A { 39 } 40 41 static boolean crash = false; 42 43 static boolean m2() { 44 return crash; 45 } 46 47 static int m3(float[] arr) { 48 return 0; 49 } 50 51 static float m1(A aa) { 52 float res = 0; 53 float[] arr = new float[10]; 54 for (int i = 0; i < 10; i++) { 55 if (m2()) { 56 arr = null; 57 } 58 m3(arr); 59 int j = arr.length; 60 int k = 0; 61 for (k = 9; k < j; k++) { 62 } 63 if (k == 10) { 64 if (aa instanceof B) { 65 } 66 } 67 res += arr[0]; 68 res += arr[1]; 69 } 70 return res; 71 } 72 73 static public void main(String args[]) { 74 A a = new A(); 75 B b = new B(); 76 for (int i = 0; i < 20000; i++) { 77 m1(a); 78 } 79 crash = true; 80 try { 81 m1(a); 82 } catch (NullPointerException npe) {} 83 } 84 }