1 /*
   2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8039043
  27  * @summary Null check is placed in a wrong place when storing a null to an object field on x64 with compressed oops off
  28  * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CompileCommand=compileonly,C1NullCheckOfNullStore::test -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -XX:-UseCompressedOops C1NullCheckOfNullStore
  29  *
  30  */
  31 
  32 public class C1NullCheckOfNullStore {
  33   private static class Foo {
  34     Object bar;
  35   }
  36   static private void test(Foo x) {
  37     x.bar = null;
  38   }
  39   static public void main(String args[]) {
  40     Foo x = new Foo();
  41     for (int i = 0; i < 10000; i++) {
  42       test(x);
  43     }
  44     boolean gotNPE = false;
  45     try {
  46       for (int i = 0; i < 10000; i++) {
  47         test(null);
  48       }
  49     }
  50     catch(NullPointerException e) {
  51       gotNPE = true;
  52     }
  53     if (!gotNPE) {
  54       throw new Error("Expecting a NullPointerException");
  55     }
  56   }
  57 }