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comparison test/compiler/7046096/Test7046096.java @ 3788:e3cbc9ddd434

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7044738: Loop unroll optimization causes incorrect result Summary: take into account memory dependencies when clonning nodes in clone_up_backedge_goo(). Reviewed-by: never
author kvn
date Tue, 28 Jun 2011 15:24:29 -0700
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3787:6ae7a1561b53 3788:e3cbc9ddd434
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 7046096
28 * @summary SEGV IN C2 WITH 6U25
29 *
30 * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:+OptimizeStringConcat Test7046096
31 */
32
33
34 public class Test7046096 {
35
36 static int first = 1;
37
38 String add(String str) {
39 if (first != 0) {
40 return str + "789";
41 } else {
42 return "null";
43 }
44 }
45
46 String test(String str) {
47 for (int i=0; i < first; i++) {
48 if (i > 1)
49 return "bad";
50 }
51 return add(str+"456");
52 }
53
54 public static void main(String [] args) {
55 Test7046096 t = new Test7046096();
56 for (int i = 0; i < 11000; i++) {
57 String str = t.test("123");
58 if (!str.equals("123456789")) {
59 System.out.println("FAILED: " + str + " != \"123456789\"");
60 System.exit(97);
61 }
62 }
63 }
64 }
65