/*

 * 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.

 *

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 */

/**

 * @test

 * @bug 7044738

 * @summary Loop unroll optimization causes incorrect result

 *

 * @run main/othervm -Xbatch Test7044738

 */

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];

  }

}