83 lines
2.6 KiB
Java
83 lines
2.6 KiB
Java
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 7173584
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* @summary arraycopy as macro node
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*
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* @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement
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* compiler.arraycopy.TestArrayCopyMacro
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*/
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package compiler.arraycopy;
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public class TestArrayCopyMacro {
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static class A {
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}
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// In its own method so profiling reports both branches taken
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static Object m2(Object o1, Object o2, int i) {
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if (i == 4) {
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return o1;
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}
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return o2;
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}
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static Object m1(A[] src, Object dest) {
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int i = 1;
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// won't be optimized out until after parsing
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for (; i < 3; i *= 4) {
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}
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dest = m2(new A[10], dest, i);
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// dest is new array here but C2 picks the "disjoint" stub
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// only if stub to call is decided after parsing
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System.arraycopy(src, 0, dest, 0, 10);
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return dest;
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}
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public static void main(String[] args) {
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A[] array_src = new A[10];
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for (int i = 0; i < array_src.length; i++) {
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array_src[i] = new A();
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}
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for (int i = 0; i < 20000; i++) {
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m2(null, null, 0);
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}
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for (int i = 0; i < 20000; i++) {
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Object[] array_dest = (Object[])m1(array_src, null);
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for (int j = 0; j < array_src.length; j++) {
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if (array_dest[j] != array_src[j]) {
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throw new RuntimeException("copy failed at index " + j + " src = " + array_src[j] + " dest = " + array_dest[j]);
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}
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}
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}
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}
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}
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