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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 8078426

 * @summary split if finds predicates on several incoming paths when unswitched's loops are optimized out

 *

 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseOnStackReplacement

 *                   -XX:-BackgroundCompilation -XX:-UseCompressedOops

 *                   compiler.loopopts.TestSplitIfUnswitchedLoopsEliminated

 */

package compiler.loopopts;

public class TestSplitIfUnswitchedLoopsEliminated {

    static class A {

        int f;

    }

    static A aa = new A();

    static A aaa = new A();

    static int test_helper(int stop, boolean unswitch) {

        A a = null;

        for (int i = 3; i < 10; i++) {

            if (unswitch) {

                a = null;

            } else {

                a = aa;

                int v = a.f;

            }

        }

        if (stop != 4) {

            a = aaa;

        }

        if (a != null) {

            return a.f;

        }

        return 0;

    }

    static int test(boolean unswitch) {

        int stop = 1;

        for (; stop < 3; stop *= 4) {

        }

        return test_helper(stop, unswitch);

    }

    public static void main(String[] args) {

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

            test_helper(10, i%2 == 0);

            test(i%2 == 0);

        }

    }

}