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 8134321 27 * @summary Code that capture field values of eliminated allocation at a safepoint when there's an arraycopy behind a Phi is broken 28 * 29 * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement 30 * compiler.arraycopy.TestEliminatedArrayCopyPhi 31 */ 32 33 package compiler.arraycopy; 34 35 public class TestEliminatedArrayCopyPhi { 36 37 static int[] escaped; 38 39 static void test(int[] src, boolean flag1, boolean flag2) { 40 int[] array = new int[10]; 41 if (flag1) { 42 System.arraycopy(src, 0, array, 0, src.length); 43 } else { 44 } 45 46 if (flag2) { 47 // never taken 48 escaped = array; 49 } 50 } 51 52 public static void main(String[] args) { 53 int[] src = new int[10]; 54 for (int i = 0; i < 20000; i++) { 55 test(src, (i % 2) == 0, false); 56 } 57 } 58 }