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annotate graal/GraalCompiler/src/com/sun/c1x/ir/TypeCheck.java @ 2852:c6bdec623ef9

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Move TypeCHeck to floating nodes, rename Nodes to aboid using an *Op suffix
author Gilles Duboscq <gilles.duboscq@oracle.com>
date Tue, 07 Jun 2011 12:10:27 +0200
parents f9f40748442f
children
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1 /*
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2 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.sun.c1x.ir;
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24
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25 import com.oracle.graal.graph.*;
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26 import com.sun.cri.ci.*;
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27 import com.sun.cri.ri.*;
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28
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29 /**
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30 * The {@code TypeCheck} instruction is the base class of casts and instanceof tests.
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31 */
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32 public abstract class TypeCheck extends FloatingNode {
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33
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34 private static final int INPUT_COUNT = 2;
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35 private static final int INPUT_OBJECT = 0;
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36 private static final int INPUT_TARGET_CLASS_INSTRUCTION = 1;
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37
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38 private static final int SUCCESSOR_COUNT = 0;
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39
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40 @Override
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41 protected int inputCount() {
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42 return super.inputCount() + INPUT_COUNT;
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43 }
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44
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45 @Override
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46 protected int successorCount() {
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47 return super.successorCount() + SUCCESSOR_COUNT;
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48 }
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49
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50 /**
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51 * The instruction which produces the object input.
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52 */
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53 public Value object() {
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54 return (Value) inputs().get(super.inputCount() + INPUT_OBJECT);
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55 }
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56
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57 public Value setObject(Value n) {
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58 return (Value) inputs().set(super.inputCount() + INPUT_OBJECT, n);
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59 }
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60
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61 /**
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62 * The instruction that loads the target class object that is used by this checkcast.
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63 */
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64 public Value targetClassInstruction() {
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65 return (Value) inputs().get(super.inputCount() + INPUT_TARGET_CLASS_INSTRUCTION);
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66 }
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67
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68 public Value setTargetClassInstruction(Value n) {
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69 return (Value) inputs().set(super.inputCount() + INPUT_TARGET_CLASS_INSTRUCTION, n);
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70 }
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71
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72 final RiType targetClass;
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73
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74 /**
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75 * Creates a new TypeCheck instruction.
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76 * @param targetClass the class which is being casted to or checked against
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77 * @param object the instruction which produces the object
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78 * @param kind the result type of this instruction
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79 * @param stateBefore the state before this instruction is executed
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80 * @param inputCount
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81 * @param successorCount
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82 * @param graph
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83 */
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84 public TypeCheck(RiType targetClass, Value targetClassInstruction, Value object, CiKind kind, int inputCount, int successorCount, Graph graph) {
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85 super(kind, inputCount + INPUT_COUNT, successorCount + SUCCESSOR_COUNT, graph);
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86 this.targetClass = targetClass;
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87 setObject(object);
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88 setTargetClassInstruction(targetClassInstruction);
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89 }
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90
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91 /**
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92 * Gets the target class, i.e. the class being cast to, or the class being tested against.
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93 * @return the target class
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94 */
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95 public RiType targetClass() {
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96 return targetClass;
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97 }
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98
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99 /**
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100 * Checks whether the target class of this instruction is loaded.
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101 * @return {@code true} if the target class is loaded
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102 */
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103 public boolean isLoaded() {
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104 return targetClass != null;
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105 }
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106
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107 }