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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * accompanied this code).
 *
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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 jdk.internal.vm.annotation.Stable;

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);
            }
        }
    }
}