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comparison test/compiler/6973329/Test.java @ 1693:6c9cc03d8726

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6973329: C2 with Zero based COOP produces code with broken anti-dependency on x86 Summary: Recompile without subsuming loads if RA try to clone a node with anti_dependence. Reviewed-by: never
author kvn
date Wed, 11 Aug 2010 10:48:20 -0700
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1692:d2ede61b7a12 1693:6c9cc03d8726
1 /*
2 * Copyright (c) 2010, 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 * @test
26 * @bug 6973329
27 * @summary C2 with Zero based COOP produces code with broken anti-dependency on x86
28 *
29 * @run main/othervm -Xbatch -Xcomp -XX:CompileOnly=Test Test
30 */
31
32 class A {
33 A next;
34 int n;
35
36 public int get_n() {
37 return n+1;
38 }
39 }
40 public class Test {
41
42 A a;
43
44 void test (A new_next) {
45 A prev_next = a.next;
46 a.next = new_next;
47 if (prev_next == null) {
48 a.n = a.get_n();
49 }
50 }
51
52 public static void main(String args[]) {
53 Test t = new Test();
54 t.a = new A();
55 t.a.n = 1;
56 t.test(new A());
57 if (t.a.n != 2) {
58 System.out.println("Wrong value: " + t.a.n + " expected: 2");
59 System.exit(97);
60 }
61 }
62 }
63