/*

 * Copyright (c) 2017, Red Hat, Inc. All rights reserved.

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/**

 * @test

 * @bug 8174164

 * @summary SafePointNode::_replaced_nodes breaks with irreducible loops

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

 *

 */

public class TestReplacedNodesOSR {

    static Object dummy;

    static interface I {

    }

    static class A implements I {

    }

    static final class MyException extends Exception {

    }

    static final A obj = new A();

    static I static_field() { return obj; }

    // When OSR compiled, this method has an irreducible loop

    static void test(int v, MyException e) {

        int i = 0;

        for (;;) {

            if (i == 1000) {

                break;

            }

            try {

                if ((i%2) == 0) {

                    int j = 0;

                    for (;;) {

                        j++;

                        if (i+j != v) {

                            if (j == 1000) {

                                break;

                            }

                        } else {

                            A a = (A)static_field();

                            // replaced node recorded here

                            throw e;

                        }

                    }

                }

            } catch(MyException ex) {

            }

            i++;

            // replaced node applied on return of the method

            // replaced node used here

            dummy = static_field();

        }

    }

    static public void main(String[] args) {

        for (int i = 0; i < 1000; i++) {

            test(1100, new MyException());

        }

    }

}