Mercurial > hg > truffle

annotate test/compiler/membars/TestMemBarAcquire.java @ 20413:91cb3b8aac2b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
8048879: "unexpected yanked node" opto/postaloc.cpp:139 Summary: MemBarAcquireNode prevents deletion of dead LoadNNode. Added condition to 'has_special_unique_user' to trigger deletion. Reviewed-by: kvn, iveresov
author thartmann
date Tue, 19 Aug 2014 07:36:11 +0200
parents
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
20413
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
1 /*
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
4 *
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
7 * published by the Free Software Foundation.
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
8 *
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
13 * accompanied this code).
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
14 *
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
18 *
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
20 * or visit www.oracle.com if you need additional information or have any
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
21 * questions.
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
22 */
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
23
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
24 /*
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
25 * @test TestMemBarAcquire
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
26 * @bug 8048879
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
27 * @summary "Tests optimization of MemBarAcquireNodes"
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
28 * @run main/othervm -XX:-TieredCompilation -XX:-BackgroundCompilation TestMemBarAcquire
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
29 */
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
30 public class TestMemBarAcquire {
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
31 private volatile static Object defaultObj = new Object();
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
32 private Object obj;
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
33
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
34 public TestMemBarAcquire(Object param) {
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
35 // Volatile load. MemBarAcquireNode is added after the
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
36 // load to prevent following loads from floating up past.
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
37 // StoreNode is added to store result of load in 'obj'.
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
38 this.obj = defaultObj;
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
39 // Overrides 'obj' and therefore makes previous StoreNode
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
40 // and the corresponding LoadNode useless. However, the
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
41 // LoadNode is still connected to the MemBarAcquireNode
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
42 // that should now release the reference.
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
43 this.obj = param;
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
44 }
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
45
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
46 public static void main(String[] args) throws Exception {
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
47 // Make sure TestMemBarAcquire::<init> is compiled
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
48 for (int i = 0; i < 100000; ++i) {
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
49 TestMemBarAcquire p = new TestMemBarAcquire(new Object());
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
50 }
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
51 }
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
52 }
91cb3b8aac2b 8048879: "unexpected yanked node" opto/postaloc.cpp:139
thartmann
parents:
diff changeset
53