/*

 * Copyright (c) 2015, 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

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 * questions.

 */

/*

 * @test

 * @bug 8080976

 * @summary Loop variant use in reduction should prevent vectorization

 * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement TestReductionWithLoopVariantUse

 *

 */

public class TestReductionWithLoopVariantUse {

    static int m(int[] array) {

        int c = 0;

        for (int i = 0; i < 256; i++) {

            c += array[i];

            array[i] = c;

        }

        return c;

    }

    static public void main(String[] args) {

        int[] array = new int[256];

        int[] array2 = new int[256];

        for (int j = 0; j < 256; j++) {

            array2[j] = j;

        }

        for (int i = 0; i < 20000; i++) {

            System.arraycopy(array2, 0, array, 0, 256);

            int res = m(array);

            boolean success = true;

            int c = 0;

            for (int j = 0; j < 256; j++) {

                c += array2[j];

                if (array[j] != c) {

                    System.out.println("Failed for " + j + " : " + array[j] + " != " + c);

                    success = false;

                }

            }

            if (c != res) {

                System.out.println("Failed for sum: " + c + " != " + res);

            }

            if (!success) {

                throw new RuntimeException("Test failed");

            }

        }

    }

}