|
1 /* |
|
2 * Copyright (c) 2011, 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 /** |
|
26 * @test |
|
27 * @bug 7044738 |
|
28 * @summary Loop unroll optimization causes incorrect result |
|
29 * |
|
30 * @run main/othervm -Xbatch Test7044738 |
|
31 */ |
|
32 |
|
33 public class Test7044738 { |
|
34 |
|
35 private static final int INITSIZE = 10000; |
|
36 public int d[] = { 1, 2, 3, 4 }; |
|
37 public int i, size; |
|
38 |
|
39 private static int iter = 5; |
|
40 |
|
41 boolean done() { return (--iter > 0); } |
|
42 |
|
43 public static void main(String args[]) { |
|
44 Test7044738 t = new Test7044738(); |
|
45 t.test(); |
|
46 } |
|
47 |
|
48 int test() { |
|
49 |
|
50 while (done()) { |
|
51 size = INITSIZE; |
|
52 |
|
53 for (i = 0; i < size; i++) { |
|
54 d[0] = d[1]; // 2 |
|
55 d[1] = d[2]; // 3 |
|
56 d[2] = d[3]; // 4 |
|
57 d[3] = d[0]; // 2 |
|
58 |
|
59 d[0] = d[1]; // 3 |
|
60 d[1] = d[2]; // 4 |
|
61 d[2] = d[3]; // 2 |
|
62 d[3] = d[0]; // 3 |
|
63 |
|
64 d[0] = d[1]; // 4 |
|
65 d[1] = d[2]; // 2 |
|
66 d[2] = d[3]; // 3 |
|
67 d[3] = d[0]; // 4 |
|
68 |
|
69 d[0] = d[1]; // 2 |
|
70 d[1] = d[2]; // 3 |
|
71 d[2] = d[3]; // 4 |
|
72 d[3] = d[0]; // 2 |
|
73 |
|
74 d[0] = d[1]; // 3 |
|
75 d[1] = d[2]; // 4 |
|
76 d[2] = d[3]; // 2 |
|
77 d[3] = d[0]; // 3 |
|
78 |
|
79 d[0] = d[1]; // 4 |
|
80 d[1] = d[2]; // 2 |
|
81 d[2] = d[3]; // 3 |
|
82 d[3] = d[0]; // 4 |
|
83 |
|
84 d[0] = d[1]; // 2 |
|
85 d[1] = d[2]; // 3 |
|
86 d[2] = d[3]; // 4 |
|
87 d[3] = d[0]; // 2 |
|
88 |
|
89 d[0] = d[1]; // 3 |
|
90 d[1] = d[2]; // 4 |
|
91 d[2] = d[3]; // 2 |
|
92 d[3] = d[0]; // 3 |
|
93 } |
|
94 |
|
95 // try to defeat dead code elimination |
|
96 if (d[0] == d[1]) { |
|
97 System.out.println("test failed: iter=" + iter + " i=" + i + " d[] = { " + d[0] + ", " + d[1] + ", " + d[2] + ", " + d[3] + " } "); |
|
98 System.exit(97); |
|
99 } |
|
100 } |
|
101 return d[3]; |
|
102 } |
|
103 |
|
104 } |