Mercurial > hg > graal-compiler
annotate graal/GraalCompiler/src/com/sun/c1x/ir/LoadField.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 | c480605ef068 |
children | 3fc322165071 |
rev | line source |
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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.debug.*; |
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26 import com.sun.c1x.value.*; |
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27 import com.sun.cri.ci.*; |
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28 import com.sun.cri.ri.*; |
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29 |
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30 /** |
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31 * The {@code LoadField} instruction represents a read of a static or instance field. |
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32 */ |
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33 public final class LoadField extends AccessField { |
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34 |
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35 /** |
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36 * Creates a new LoadField instance. |
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37 * @param object the receiver object |
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38 * @param field the compiler interface field |
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39 * @param isStatic indicates if the field is static |
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40 * @param stateBefore the state before the field access |
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41 * @param isLoaded indicates if the class is loaded |
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42 */ |
2538
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43 public LoadField(Value object, RiField field, FrameState stateBefore, boolean isLoaded) { |
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44 super(field.kind().stackKind(), object, field, stateBefore, isLoaded); |
2507
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45 } |
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46 |
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47 /** |
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48 * Gets the declared type of the field being accessed. |
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49 * @return the declared type of the field being accessed. |
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50 */ |
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51 @Override |
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52 public RiType declaredType() { |
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53 return field().type(); |
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54 } |
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55 |
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56 /** |
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57 * Gets the exact type of the field being accessed. If the field type is |
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58 * a primitive array or an instance class and the class is loaded and final, |
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59 * then the exact type is the same as the declared type. Otherwise it is {@code null} |
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60 * @return the exact type of the field if known; {@code null} otherwise |
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61 */ |
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62 @Override |
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63 public RiType exactType() { |
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64 RiType declaredType = declaredType(); |
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65 return declaredType.isResolved() ? declaredType.exactType() : null; |
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66 } |
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67 |
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68 @Override |
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69 public void accept(ValueVisitor v) { |
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70 v.visitLoadField(this); |
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71 } |
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72 |
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73 /** |
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74 * Gets a constant value to which this load can be reduced. |
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75 * |
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76 * @return {@code null} if this load cannot be reduced to a constant |
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77 */ |
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78 public CiConstant constantValue() { |
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79 if (isStatic()) { |
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80 return field.constantValue(null); |
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81 } else if (object().isConstant()) { |
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82 CiConstant cons = field.constantValue(object().asConstant()); |
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83 if (cons != null) { |
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84 return cons; |
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85 } |
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86 return cons; |
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87 } |
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88 return null; |
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89 } |
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90 |
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91 @Override |
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92 public void print(LogStream out) { |
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93 out.print(object()). |
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94 print("."). |
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95 print(field.name()). |
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96 print(" [field: "). |
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97 print(CiUtil.format("%h.%n:%t", field, false)). |
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98 print("]"); |
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99 } |
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100 } |