aoqi@0: /*
aoqi@0:  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 8011646
aoqi@0:  * @summary SEGV in compiled code with loop predication
aoqi@0:  * @run main/othervm  -XX:-TieredCompilation -XX:CompileOnly=TestHashCode.m1,Object.hashCode TestHashCode
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: public class TestHashCode {
aoqi@0:     static class A {
aoqi@0:         int i;
aoqi@0:     }
aoqi@0: 
aoqi@0:     static class B extends A {
aoqi@0:     }
aoqi@0: 
aoqi@0:     static boolean crash = false;
aoqi@0: 
aoqi@0:     static A m2() {
aoqi@0:         if (crash) {
aoqi@0:             return null;
aoqi@0:         }
aoqi@0:         return new A();
aoqi@0:     }
aoqi@0: 
aoqi@0:     static int m1(A aa) {
aoqi@0:         int res = 0;
aoqi@0:         for (int i = 0; i < 10; i++) {
aoqi@0:             A a = m2();
aoqi@0:             int j = a.i;
aoqi@0:             if (aa instanceof B) {
aoqi@0:             }
aoqi@0:             res += a.hashCode();
aoqi@0:         }
aoqi@0:         return res;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static void main(String[] args) {
aoqi@0:         A a = new A();
aoqi@0:         for (int i = 0; i < 20000; i++) {
aoqi@0:             m1(a);
aoqi@0:         }
aoqi@0:         crash = true;
aoqi@0:         try {
aoqi@0:           m1(a);
aoqi@0:         } catch (NullPointerException e) {
aoqi@0:             System.out.println("Test passed");
aoqi@0:         }
aoqi@0:     }
aoqi@0: }