Mercurial > hg > truffle
comparison test/compiler/5091921/Test6992759.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 |
parents | |
children | 514efad5e81a |
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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 6992759 | |
28 * @summary Bad code generated for integer <= comparison, fails for Integer.MAX_VALUE | |
29 * | |
30 * @run main Test6992759 | |
31 */ | |
32 | |
33 public class Test6992759 { | |
34 | |
35 static final int N_TESTS = 1000000000; | |
36 | |
37 public static void main(String[] args) throws Exception { | |
38 | |
39 /* | |
40 * If MAX_VALUE is changed to MAX_VALUE - 1 below, the test passes | |
41 * because (apparently) bad code is only generated when comparing | |
42 * <= MAX_VALUE in the doTest method. | |
43 */ | |
44 Test6992759 test = new Test6992759(); | |
45 for (int i = 0; i < N_TESTS; i += 1) { | |
46 test.doTest(10, Integer.MAX_VALUE, i); | |
47 //test.doTest(10, Integer.MAX_VALUE - 1, i); | |
48 } | |
49 System.out.println("No failure"); | |
50 } | |
51 | |
52 void doTest(int expected, int max, int i) { | |
53 int counted; | |
54 for (counted = 0; | |
55 (counted <= max) && (counted < expected); | |
56 counted += 1) { | |
57 } | |
58 if (counted != expected) { | |
59 throw new RuntimeException("Failed test iteration=" + i + | |
60 " max=" + max + | |
61 " counted=" + counted + | |
62 " expected=" + expected); | |
63 } | |
64 } | |
65 } | |
66 |