Mercurial > hg > truffle
comparison test/compiler/7179138/Test7179138_2.java @ 6186:751bd303aa45
7179138: Incorrect result with String concatenation optimization
Summary: check for and skip diamond shaped NULL check code for the result of toString()
Reviewed-by: twisti, roland
author | kvn |
---|---|
date | Tue, 26 Jun 2012 09:06:16 -0700 |
parents | |
children |
comparison
equal
deleted
inserted
replaced
6185:424142833d10 | 6186:751bd303aa45 |
---|---|
1 /* | |
2 * Copyright 2012 Skip Balk. 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 7179138 | |
27 * @summary Incorrect result with String concatenation optimization | |
28 * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation Test7179138_2 | |
29 * | |
30 * @author Skip Balk | |
31 */ | |
32 | |
33 public class Test7179138_2 { | |
34 public static void main(String[] args) throws Exception { | |
35 System.out.println("Java Version: " + System.getProperty("java.vm.version")); | |
36 long[] durations = new long[60]; | |
37 for (int i = 0; i < 100000; i++) { | |
38 // this empty for-loop is required to reproduce this bug | |
39 for (long duration : durations) { | |
40 // do nothing | |
41 } | |
42 { | |
43 String s = "test"; | |
44 int len = s.length(); | |
45 | |
46 s = s + s; | |
47 len = len + len; | |
48 | |
49 s = s + s; | |
50 len = len + len; | |
51 | |
52 s = s + s; | |
53 len = len + len; | |
54 | |
55 if (s.length() != len) { | |
56 System.out.println("Failed at iteration: " + i); | |
57 System.out.println("Length mismatch: " + s.length() + " <> " + len); | |
58 System.out.println("Expected: \"" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "\""); | |
59 System.out.println("Actual: \"" + s + "\""); | |
60 System.exit(0); | |
61 } | |
62 } | |
63 } | |
64 } | |
65 } | |
66 |