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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

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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).

 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

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 *

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 */

/**

 * @test

 * @bug 8149797

 * @summary node replaced by dominating dead cast during parsing

 *

 * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation

 *      -XX:TypeProfileLevel=200

 *      -XX:CompileCommand=dontinline,compiler.c2.TestDominatingDeadCheckCast::not_inlined

 *      compiler.c2.TestDominatingDeadCheckCast

 */

package compiler.c2;

public class TestDominatingDeadCheckCast {

    static class A {

        int f;

    }

    static class B extends A {

    }

    static A not_inlined() {

        return new A();

    }

    static void inlined(A param) {

        param.f = 42;

    }

    static A field;

    static void test(boolean flag1, boolean flag2, boolean flag3, boolean flag4, boolean flag5) {

        // Go through memory rather than through a local to defeat C2's replace_in_map

        field = not_inlined();

        // Speculation adds a CheckCast on entry of this inlined

        // method for the parameter

        inlined(field);

        // Walk up the dominators is depth limited, make the CheckCast

        // above unreachable from the last inlined call

        if (flag1) {

            if (flag2) {

                if (flag3) {

                    // Speculation adds a CheckCast on entry of this

                    // inlined method for the parameter. This

                    // CheckCast is replaced by the CheckCast of the

                    // first inlined method call but the replaced

                    // CheckCast is still around during parsing.

                    inlined(field);

                    // Same as above, some useless control

                    if (flag4) {

                        if (flag5) {

                            // Speculation adds a CheckCast on entry

                            // of this inlined method for the

                            // parameter. This CheckCast is replaced

                            // by the dead CheckCast of the previous

                            // inlined() call.

                            inlined(field);

                        }

                    }

                }

            }

        }

    }

    static public void main(String[] args) {

        field = new A();

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

            test(true, true, true, true, true);

        }

    }

}