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annotate graal/GraalCompiler/src/com/sun/c1x/ir/TypeCheck.java @ 2521:2f271a85d104

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Removed intrinsic-related instructions
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 16:40:09 +0200
parents 16b9a8b5ad39
children e1ba5a93e997
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2507
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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.sun.c1x.value.*;
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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 * @author Ben L. Titzer
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33 */
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34 public abstract class TypeCheck extends StateSplit {
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35
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36 final RiType targetClass;
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37 public Value targetClassInstruction;
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38 Value object;
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39
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40 /**
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41 * Creates a new TypeCheck instruction.
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42 * @param targetClass the class which is being casted to or checked against
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43 * @param object the instruction which produces the object
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44 * @param kind the result type of this instruction
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45 * @param stateBefore the state before this instruction is executed
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46 */
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47 public TypeCheck(RiType targetClass, Value targetClassInstruction, Value object, CiKind kind, FrameState stateBefore) {
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48 super(kind, stateBefore);
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49 this.targetClass = targetClass;
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50 this.targetClassInstruction = targetClassInstruction;
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51 this.object = object;
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52 }
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53
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54 /**
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55 * Gets the instruction that loads the target class object that is used by this checkcast.
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56 * @return the target class instruction
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57 */
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58 public Value targetClassInstruction() {
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59 return targetClassInstruction;
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60 }
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61
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62 /**
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63 * Gets the target class, i.e. the class being cast to, or the class being tested against.
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64 * @return the target class
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65 */
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66 public RiType targetClass() {
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67 return targetClass;
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68 }
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69
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70 /**
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71 * Gets the instruction which produces the object input.
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72 * @return the instruction producing the object
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73 */
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74 public Value object() {
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75 return object;
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76 }
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77
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78 /**
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79 * Checks whether the target class of this instruction is loaded.
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80 * @return {@code true} if the target class is loaded
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81 */
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82 public boolean isLoaded() {
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83 return targetClass != null;
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84 }
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85
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86 /**
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87 * Checks whether this instruction can trap.
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88 * @return {@code true}, conservatively assuming the cast may fail
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89 */
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90 @Override
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91 public boolean canTrap() {
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92 return true;
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93 }
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94
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95 /**
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96 * Iterates over the input values to this instruction.
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97 * @param closure the closure to apply
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98 */
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99 @Override
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100 public void inputValuesDo(ValueClosure closure) {
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101 object = closure.apply(object);
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102 targetClassInstruction = closure.apply(targetClassInstruction);
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103 }
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104
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105 /**
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106 * Sets this type check operation to be a direct compare.
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107 */
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108 public void setDirectCompare() {
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109 setFlag(Flag.DirectCompare);
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110 }
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111
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112 /**
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113 * Checks where this comparison is a direct compare, because the class compared to is a leaf class.
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114 * @return {@code true} if this typecheck is a direct compare
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115 */
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116 public boolean isDirectCompare() {
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117 return checkFlag(Flag.DirectCompare);
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118 }
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119 }