/*
* Copyright (c) 2011, 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 7044738
* @summary Loop unroll optimization causes incorrect result
*
* @run main/othervm -Xbatch compiler.loopopts.Test7044738
*/
package compiler.loopopts;
public class Test7044738 {
private static final int INITSIZE = 10000;
public int d[] = {1, 2, 3, 4};
public int i, size;
private static int iter = 5;
boolean done() {
return (--iter > 0);
}
public static void main(String args[]) {
Test7044738 t = new Test7044738();
t.test();
}
int test() {
while (done()) {
size = INITSIZE;
for (i = 0; i < size; i++) {
d[0] = d[1]; // 2
d[1] = d[2]; // 3
d[2] = d[3]; // 4
d[3] = d[0]; // 2
d[0] = d[1]; // 3
d[1] = d[2]; // 4
d[2] = d[3]; // 2
d[3] = d[0]; // 3
d[0] = d[1]; // 4
d[1] = d[2]; // 2
d[2] = d[3]; // 3
d[3] = d[0]; // 4
d[0] = d[1]; // 2
d[1] = d[2]; // 3
d[2] = d[3]; // 4
d[3] = d[0]; // 2
d[0] = d[1]; // 3
d[1] = d[2]; // 4
d[2] = d[3]; // 2
d[3] = d[0]; // 3
d[0] = d[1]; // 4
d[1] = d[2]; // 2
d[2] = d[3]; // 3
d[3] = d[0]; // 4
d[0] = d[1]; // 2
d[1] = d[2]; // 3
d[2] = d[3]; // 4
d[3] = d[0]; // 2
d[0] = d[1]; // 3
d[1] = d[2]; // 4
d[2] = d[3]; // 2
d[3] = d[0]; // 3
}
// try to defeat dead code elimination
if (d[0] == d[1]) {
System.out.println("test failed: iter=" + iter + " i=" + i + " d[] = { " + d[0] + ", " + d[1] + ", " + d[2] + ", " + d[3] + " } ");
System.exit(97);
}
}
return d[3];
}
}