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 * @test 26 * @bug 8074676 27 * @summary after guards in Arrays.copyOf() intrinsic, control may become top 28 * 29 * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement 30 * compiler.arraycopy.TestArrayCopyOfStopped 31 */ 32 33 package compiler.arraycopy; 34 35 import java.util.Arrays; 36 37 public class TestArrayCopyOfStopped { 38 static class A { 39 } 40 41 static class B { 42 } 43 44 static final B[] array_of_bs = new B[10]; 45 static final A[] array_of_as = new A[10]; 46 47 static Object[] m1_helper(Object[] array, boolean flag) { 48 if (flag) { 49 return Arrays.copyOf(array, 10, A[].class); 50 } 51 return null; 52 } 53 54 static Object[] m1(boolean flag) { 55 return m1_helper(array_of_bs, flag); 56 } 57 58 public static void main(String[] args) { 59 for (int i = 0; i < 20000; i++) { 60 m1_helper(array_of_as, (i%2) == 0); 61 } 62 63 for (int i = 0; i < 20000; i++) { 64 m1(false); 65 } 66 } 67 }