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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * 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.

 *

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 */

/**

 * @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];

    }

}