Mercurial > hg > truffle
comparison test/compiler/codegen/C1NullCheckOfNullStore.java @ 17831:876390ee9b6f
8039043: Implicit null check is in the wrong place in C1 -UseCompressedOops
Summary: Null check is placed in a wrong place when storing a null to an object field on x64 with compressed oops off
Reviewed-by: roland, vlivanov, kvn
author | iveresov |
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date | Wed, 02 Apr 2014 11:24:51 -0700 |
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17829:0118c8c7b80f | 17831:876390ee9b6f |
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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 } |