Mercurial > hg > graal-jvmci-8
annotate graal/GraalCompiler/src/com/sun/c1x/ir/TypeCheck.java @ 2538:e1ba5a93e997
Clean up on Value class and LIRGenerator/LIRItem-related things.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 20:13:54 +0200 |
parents | 16b9a8b5ad39 |
children | c58a301eb2d7 |
rev | line source |
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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 } |