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 * 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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 */

/*

 * @test

 * @bug 8027571

 * @summary meet of TopPTR exact array with constant array is not symmetric

 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseOnStackReplacement -XX:TypeProfileLevel=222 -XX:+UseTypeSpeculation -XX:-BackgroundCompilation TestMeetTopArrayExactConstantArray

 *

 */

public class TestMeetTopArrayExactConstantArray {

    static class A {

    }

    static class B {

    }

    static class C extends A {

    }

    static class D extends C {

    }

    final static B[] b = new B[10];

    static void m0(Object[] o) {

        if (o.getClass() ==  Object[].class) {

        }

    }

    static void m1(Object[] o, boolean cond) {

        if (cond) {

            o = b;

        }

        m0(o);

    }

    static void m2(Object[] o, boolean cond1, boolean cond2) {

        if (cond1) {

            m1(o, cond2);

        }

    }

    static void m3(C[] o, boolean cond1, boolean cond2, boolean cond3) {

        if (cond1) {

            m2(o, cond2, cond3);

        }

    }

    static public void main(String[] args) {

        A[] a = new A[10];

        D[] d = new D[10];

        Object[] o = new Object[10];

        for (int i = 0; i < 5000; i++) {

            // record in profiling that the if in m0 succeeds

            m0(o);

            // record some profiling for m2 and m1

            m2(a, true, (i%2) == 0);

            // record some profiling for m3 and conflicting profile for m2

            m3(d, true, false, (i%2) == 0);

        }

        // get m3 compiled. The if in m0 will be optimized because of argument profiling in m3

        C[] c = new C[10];

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

            m3(c, true, false, (i%2) == 0);

        }

        // make m3 not entrant and the if in m0 fail

        m3(c, true, true, false);

        m3(c, true, true, false);

        m3(c, true, true, false);

        m3(c, true, true, false);

        // make m3 recompile, this time with if the not optimized

        // on entry to m3, argument o is of type C[], profiled C[]

        // on entry to m1, argument o is of type C[], speculative C[] exact, profiled A[]. Speculative becomes AnyNull

        // after the if in m1, speculative type of o becomes constant from final field b

        // the true if branch in m0 does a join between the type of o of speculative type constant from final field b and exact klass Object[]

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

            m3(c, true, false, (i%2) == 0);

        }

        System.out.println("TEST PASSED");

    }

}