Mercurial > hg > truffle
comparison test/compiler/5091921/Test6935022.java @ 3345:bad7ecd0b6ed
5091921: Sign flip issues in loop optimizer
Summary: Fix integer overflow problem in the code generated by loop optimizer.
Reviewed-by: never
author | kvn |
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date | Wed, 04 May 2011 13:12:42 -0700 |
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3344:0139aac70fb5 | 3345:bad7ecd0b6ed |
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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 6935022 | |
28 * @summary Server VM incorrectly breaks out of while loop | |
29 * | |
30 * @run main Test6935022 | |
31 */ | |
32 | |
33 public class Test6935022 { | |
34 public static final void main(String[] args) throws Exception { | |
35 Test6935022 test = new Test6935022(); | |
36 | |
37 int cnt = 0; | |
38 | |
39 while (cnt < 10000) { | |
40 try { | |
41 ++cnt; | |
42 if ((cnt&1023) == 0) | |
43 System.out.println("Thread="+Thread.currentThread().getName() + " iteration: " + cnt); | |
44 test.loop(2147483647, (cnt&1023)); | |
45 } | |
46 | |
47 catch (Exception e) { | |
48 System.out.println("Caught on iteration " + cnt); | |
49 e.printStackTrace(); | |
50 System.exit(97); | |
51 } | |
52 } | |
53 } | |
54 | |
55 private void loop(int endingRow, int mask) throws Exception { | |
56 int rows = 1; | |
57 boolean next = true; | |
58 | |
59 while(rows <= endingRow && next) { | |
60 rows++; | |
61 if (rows == mask) | |
62 System.out.println("Rows="+rows+", end="+endingRow+", next="+next); | |
63 next = next(rows); | |
64 } | |
65 | |
66 if (next) | |
67 throw new Exception("Ended on rows(no rs): " + rows); | |
68 } | |
69 | |
70 private boolean next(int rows) { | |
71 return rows < 12; | |
72 } | |
73 } | |
74 |