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comparison test/compiler/7042153/Test7042153.java @ 3362:d4c1fbc3de95

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7042153: guarantee(x_compare_res != Constant::not_comparable) failed: incomparable constants in IfOp Summary: Handle IfOps folding properly in case of unloaded constant oop arguments Reviewed-by: kvn, never
author iveresov
date Fri, 06 May 2011 12:12:29 -0700
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3348:f879eafd5835 3362:d4c1fbc3de95
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 7042153
28 * @summary Bad folding of IfOps with unloaded constant arguments in C1
29 *
30 * @run main/othervm -Xcomp Test7042153
31 */
32
33 import java.lang.reflect.*;
34
35 public class Test7042153 {
36 static public class Bar { }
37 static public class Foo { }
38
39 static volatile boolean z;
40 public static void main(String [] args) {
41 Class cx = Bar.class;
42 Class cy = Foo.class;
43 z = (cx == cy);
44 }
45 }