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comparison test/compiler/5091921/Test6905845.java @ 3345:bad7ecd0b6ed

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5091921: Sign flip issues in loop optimizer Summary: Fix integer overflow problem in the code generated by loop optimizer. Reviewed-by: never
author kvn
date Wed, 04 May 2011 13:12:42 -0700
parents
children 514efad5e81a
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3344:0139aac70fb5 3345:bad7ecd0b6ed
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 6905845
28 * @summary Server VM improperly optimizing away loop.
29 *
30 * @run main Test6905845
31 */
32
33 public class Test6905845 {
34
35 public static void main(String[] args){
36 for (int asdf = 0; asdf < 5; asdf++){
37 //test block
38 {
39 StringBuilder strBuf1 = new StringBuilder(65);
40 long start = System.currentTimeMillis();
41 int count = 0;
42
43 for (int i = Integer.MIN_VALUE; i < (Integer.MAX_VALUE - 80); i += 79){
44 strBuf1.append(i);
45 count++;
46 strBuf1.delete(0, 65);
47 }
48
49 System.out.println(count);
50 if (count != 54366674) {
51 System.out.println("wrong count: " + count +", should be 54366674");
52 System.exit(97);
53 }
54 }
55 //test block
56 {
57 StringBuilder strBuf1 = new StringBuilder(65);
58 long start = System.currentTimeMillis();
59 int count = 0;
60
61 for (int i = Integer.MIN_VALUE; i < (Integer.MAX_VALUE - 80); i += 79){
62 strBuf1.append(i);
63 count++;
64 strBuf1.delete(0, 65);
65 }
66
67 System.out.println(count);
68 if (count != 54366674) {
69 System.out.println("wrong count: " + count +", should be 54366674");
70 System.exit(97);
71 }
72 }
73 }
74 }
75 }
76