/*

 * 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 6897150

 * @summary Hotspot optimises away a valid loop

 *

 * @run main compiler.c2.Test6897150

 */

package compiler.c2;

// Should be compiled with javac from JDK1.3 to get bytecode which shows the problem.

public class Test6897150 {

    public static void main(String[] args) {

        // This works

        loopAndPrint(Integer.MAX_VALUE -1);

        // This doesn't

        loopAndPrint(Integer.MAX_VALUE);

    }

    static void verify(int max, int a) {

        if ( a != (max - 1)) {

            System.out.println("Expected: " + (max - 1));

            System.out.println("Actual  : " + a);

            System.exit(97);

        }

    }

    static void loopAndPrint(int max) {

        int a = -1;

        int i = 1;

        for (; i < max; i++) {

            a = i;

        }

        verify(max, a);

    }

}