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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

 * 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).

 *

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

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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/**

 * @test

 * @bug 6478991

 * @summary C1 NullCheckEliminator yields incorrect exceptions

 *

 * @run main/othervm -Xcomp

 *      -XX:CompileCommand=compileonly,compiler.c1.NullCheckTest::test

 *      -XX:CompileCommand=compileonly,compiler.c1.NullCheckTest::inlined

 *      compiler.c1.NullCheckTest

 */

package compiler.c1;

public class NullCheckTest {

    static class A {

        int f;

        public final void inlined(A a) {

            // This cast is intended to fail.

            B b = ((B) a);

        }

    }

    static class B extends A {

    }

    private static void test(A a1, A a2) {

        // Inlined call must do a null check on a1.

        // However, the exlipcit NullCheck instruction is eliminated and

        // the null check is folded into the field load below, so the

        // exception in the inlined method is thrown before the null check

        // and the NullPointerException is not thrown.

        a1.inlined(a2);

        int x = a1.f;

    }

    public static void main(String[] args) {

        // load classes

        new B();

        try {

                test(null, new A());

                throw new InternalError("FAILURE: no exception");

        } catch (NullPointerException ex) {

                System.out.println("CORRECT: NullPointerException");

        } catch (ClassCastException ex) {

                System.out.println("FAILURE: ClassCastException");

                throw ex;

        }

    }

}