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comparison graal/GraalCompiler/src/com/sun/c1x/ir/CheckCast.java @ 2509:16b9a8b5ad39

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Renamings Runtime=>GraalRuntime and Compiler=>GraalCompiler
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 11:50:44 +0200
parents graal/Compiler/src/com/sun/c1x/ir/CheckCast.java@9ec15d6914ca
children f1bc67c2d453
comparison
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2508:fea94949e0a2 2509:16b9a8b5ad39
1 /*
2 * Copyright (c) 2009, 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 package com.sun.c1x.ir;
24
25 import com.sun.c1x.debug.*;
26 import com.sun.c1x.util.*;
27 import com.sun.c1x.value.*;
28 import com.sun.cri.bytecode.*;
29 import com.sun.cri.ci.*;
30 import com.sun.cri.ri.*;
31
32 /**
33 * The {@code CheckCast} instruction represents a {@link Bytecodes#CHECKCAST}.
34 *
35 * @author Ben L. Titzer
36 */
37 public final class CheckCast extends TypeCheck {
38
39 /**
40 * Creates a new CheckCast instruction.
41 * @param targetClass the class being cast to
42 * @param object the instruction producing the object
43 * @param stateBefore the state before the cast
44 */
45 public CheckCast(RiType targetClass, Value targetClassInstruction, Value object, FrameState stateBefore) {
46 super(targetClass, targetClassInstruction, object, CiKind.Object, stateBefore);
47 initFlag(Flag.NonNull, object.isNonNull());
48 }
49
50 /**
51 * Gets the declared type of the result of this instruction.
52 * @return the declared type of the result
53 */
54 @Override
55 public RiType declaredType() {
56 return targetClass;
57 }
58
59 /**
60 * Gets the exact type of the result of this instruction.
61 * @return the exact type of the result
62 */
63 @Override
64 public RiType exactType() {
65 return targetClass.isResolved() ? targetClass.exactType() : null;
66 }
67
68 @Override
69 public void accept(ValueVisitor v) {
70 v.visitCheckCast(this);
71 }
72
73 @Override
74 public int valueNumber() {
75 return targetClass.isResolved() ? Util.hash1(Bytecodes.CHECKCAST, object) : 0;
76 }
77
78 @Override
79 public boolean valueEqual(Instruction i) {
80 if (i instanceof CheckCast) {
81 CheckCast o = (CheckCast) i;
82 return targetClass == o.targetClass && object == o.object;
83 }
84 return false;
85 }
86
87 @Override
88 public void print(LogStream out) {
89 out.print("checkcast(").
90 print(object()).
91 print(",").
92 print(targetClassInstruction()).
93 print(") ").
94 print(CiUtil.toJavaName(targetClass()));
95 }
96 }