| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. 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 7173584 |
| * @summary arraycopy as macro node |
| * |
| * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement |
| * compiler.arraycopy.TestArrayCopyMacro |
| */ |
| |
| package compiler.arraycopy; |
| |
| public class TestArrayCopyMacro { |
| static class A { |
| } |
| |
| // In its own method so profiling reports both branches taken |
| static Object m2(Object o1, Object o2, int i) { |
| if (i == 4) { |
| return o1; |
| } |
| return o2; |
| } |
| |
| static Object m1(A[] src, Object dest) { |
| int i = 1; |
| |
| // won't be optimized out until after parsing |
| for (; i < 3; i *= 4) { |
| } |
| dest = m2(new A[10], dest, i); |
| |
| // dest is new array here but C2 picks the "disjoint" stub |
| // only if stub to call is decided after parsing |
| System.arraycopy(src, 0, dest, 0, 10); |
| return dest; |
| } |
| |
| public static void main(String[] args) { |
| A[] array_src = new A[10]; |
| |
| for (int i = 0; i < array_src.length; i++) { |
| array_src[i] = new A(); |
| } |
| |
| for (int i = 0; i < 20000; i++) { |
| m2(null, null, 0); |
| } |
| |
| for (int i = 0; i < 20000; i++) { |
| Object[] array_dest = (Object[])m1(array_src, null); |
| |
| for (int j = 0; j < array_src.length; j++) { |
| if (array_dest[j] != array_src[j]) { |
| throw new RuntimeException("copy failed at index " + j + " src = " + array_src[j] + " dest = " + array_dest[j]); |
| } |
| } |
| } |
| } |
| } |