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

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 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

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 * 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

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/*

 * @test TestStableMemoryBarrier

 * @bug 8139758

 * @summary tests memory barrier correctly inserted for stable fields

 * @library /testlibrary /../../test/lib

 *

 * @run main/bootclasspath -Xcomp -XX:CompileOnly=::testCompile

 *                   java.lang.invoke.TestStableMemoryBarrier

 *

 * @author hui.shi@linaro.org

 */

package java.lang.invoke;

import java.lang.reflect.InvocationTargetException;

public class TestStableMemoryBarrier {

    public static void main(String[] args) throws Exception {

        run(NotDominate.class);

    }

    /* ====================================================

     * Stable field initialized in method, but its allocation

     * doesn't dominate MemBar Release at the end of method.

     */

    static class NotDominate{

        public @Stable int v;

        public static int[] array = new int[100];

        public static NotDominate testCompile(int n) {

           if ((n % 2) == 0) return null;

           // add a loop here, trigger PhaseIdealLoop::verify_dominance

           for (int i = 0; i < 100; i++) {

              array[i] = n;

           }

           NotDominate nm = new NotDominate();

           nm.v = n;

           return nm;

        }

        public static void test() throws Exception {

           for (int i = 0; i < 1000000; i++)

               testCompile(i);

        }

    }

    public static void run(Class<?> test) {

        Throwable ex = null;

        System.out.print(test.getName()+": ");

        try {

            test.getMethod("test").invoke(null);

        } catch (InvocationTargetException e) {

            ex = e.getCause();

        } catch (Throwable e) {

            ex = e;

        } finally {

            if (ex == null) {

                System.out.println("PASSED");

            } else {

                System.out.println("FAILED");

                ex.printStackTrace(System.out);

            }

        }

    }

}