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/*
* Copyright (c) 2019, 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 8233164
* @summary Test correct wiring of load/store memory for arraycopy ideal transformation.
* @run main/othervm -XX:CompileCommand=dontinline,compiler.arraycopy.TestArrayCopyMemoryChain::test* -Xbatch
* compiler.arraycopy.TestArrayCopyMemoryChain
*/
package compiler.arraycopy;
public class TestArrayCopyMemoryChain {
private String mySweetEscape1 = null;
private String getString(int i) {
return "A" + i + "B";
}
// Original test depending on Indify String Concat
public void test1(int i) {
mySweetEscape1 = getString(i) + "CD";
}
private byte[] mySweetEscape2;
class Wrapper {
public final byte[] array;
public Wrapper(byte[] array) {
this.array = array;
}
}
// Simplified test independent of Strings
public void test2(int idx, int size) {
// Create destination array with unknown size and let it escape.
byte[] dst = new byte[size];
mySweetEscape2 = dst;
// Create constant src1 array.
byte[] src1 = {43, 44};
// Wrap src2 into an Object such that it's only available after
// Escape Analys determined that the Object is non-escaping.
byte[] array = {42};
Wrapper wrapper = new Wrapper(array);
byte[] src2 = wrapper.array;
// Copy src1 and scr2 into destination array.
System.arraycopy(src1, 0, dst, idx, src1.length);
System.arraycopy(src2, 0, dst, 0, src2.length);
}
public static void main(String[] args) {
TestArrayCopyMemoryChain t = new TestArrayCopyMemoryChain();
for (int i = 0; i < 100_000; ++i) {
t.test1(0);
if (!t.mySweetEscape1.equals("A0BCD")) {
throw new RuntimeException("Test1 failed");
}
t.test2(1, 3);
if (t.mySweetEscape2[0] != 42 || t.mySweetEscape2[1] != 43 || t.mySweetEscape2[2] != 44) {
throw new RuntimeException("Test2 failed");
}
}
}
}
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