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 *
29 * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation
30 *      compiler.c2.Test7179138_1
31 *
32 * @author Skip Balk
33 */
34
35package compiler.c2;
36
37public class Test7179138_1 {
38    public static void main(String[] args) throws Exception {
39        System.out.println("Java Version: " + System.getProperty("java.vm.version"));
40        long[] durations = new long[60];
41        for (int i = 0; i < 100000; i++) {
42            // this empty for-loop is required to reproduce this bug
43            for (long duration : durations) {
44                // do nothing
45            }
46            {
47                String s = "test";
48                int len = s.length();
49
50                s = new StringBuilder(String.valueOf(s)).append(s).toString();
51                len = len + len;
52
53                s = new StringBuilder(String.valueOf(s)).append(s).toString();
54                len = len + len;
55
56                s = new StringBuilder(String.valueOf(s)).append(s).toString();
57                len = len + len;
58
59                if (s.length() != len) {
60                    System.out.println("Failed at iteration: " + i);
61                    System.out.println("Length mismatch: " + s.length() + " <> " + len);
62                    System.out.println("Expected: \"" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "\"");
63                    System.out.println("Actual:   \"" + s + "\"");
64                    System.exit(97);
65                }
66            }
67        }
68    }
69}
70
71