Mercurial > hg > truffle
annotate test/compiler/6843752/Test.java @ 8416:102b5249e97e
rename projects: *snippets* -> *replacements* (GRAAL-178)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 20 Mar 2013 22:30:33 +0100 |
parents | c18cbe5936b8 |
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788 | 1 /* |
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2 * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved. |
788 | 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 * | |
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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
788 | 22 */ |
23 | |
24 /* | |
25 * @test | |
26 * @bug 6843752 | |
27 * @summary missing code for an anti-dependent Phi in GCM | |
28 * @run main/othervm -Xbatch Test | |
29 */ | |
30 | |
31 public class Test { | |
32 | |
33 Item list; | |
34 | |
35 static class Item { | |
36 public Item next; | |
37 public Item prev; | |
38 public boolean remove; | |
39 | |
40 Item(boolean r) { remove = r; } | |
41 } | |
42 | |
43 private void linkIn(Item item) { | |
44 Item head = list; | |
45 if (head == null) { | |
46 item.next = item; | |
47 item.prev = item; | |
48 list = item; | |
49 } else { | |
50 item.next = head; | |
51 item.prev = head.prev; | |
52 head.prev.next = item; | |
53 head.prev = item; | |
54 } | |
55 } | |
56 | |
57 private void linkOut(Item item) { | |
58 Item head = list; | |
59 if (item.next == item) { | |
60 list = null; | |
61 } else { | |
62 item.prev.next = item.next; | |
63 item.next.prev = item.prev; | |
64 if (head == item) { | |
65 list = item.next; | |
66 } | |
67 } | |
68 item.next = null; | |
69 item.prev = null; // this is the null pointer we are seeing | |
70 } | |
71 | |
72 private void removeItems(int numItems) { | |
73 Item item = list; | |
74 if (item == null) { | |
75 return; | |
76 } | |
77 Item last = item.prev; | |
78 boolean done = false; | |
79 while (!done && numItems > 1) { | |
80 // the original code "done = (item == last);" triggered an infinite loop | |
81 // and was changed slightly in order to produce an exception instead. | |
82 done = (item.next == last.next); | |
83 item = item.next; | |
84 if (item.prev.remove) { | |
85 linkOut(item.prev); | |
86 } | |
87 } | |
88 } | |
89 | |
90 public void perform(int numItems) { | |
91 for (int i = 0; i < numItems; i++) { | |
92 linkIn(new Item(i == 0)); | |
93 } | |
94 removeItems(numItems); | |
95 list = null; | |
96 } | |
97 | |
98 static public void main(String[] args) { | |
99 int caseCnt = 0; | |
100 Test bj = new Test(); | |
101 try { | |
102 for (; caseCnt < 500000;) { | |
103 int numItems = (++caseCnt % 2); | |
104 if ((caseCnt % 64) == 0) { | |
105 numItems = 5; | |
106 } | |
107 bj.perform(numItems); | |
108 if ((caseCnt % 100000) == 0) { | |
109 System.out.println("successfully performed " + caseCnt + " cases"); | |
110 } | |
111 } | |
112 } catch (Exception e) { | |
113 System.out.println("ERROR: crashed during case " + caseCnt); | |
114 e.printStackTrace(System.out); | |
115 System.exit(97); | |
116 } | |
117 } | |
118 } | |
119 |