Mercurial > hg > graal-jvmci-8
annotate graal/GraalCompiler/src/com/sun/c1x/ir/LoadField.java @ 2533:c480605ef068
Removed canonicalizer.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 19:05:35 +0200 |
parents | 16b9a8b5ad39 |
children | e1ba5a93e997 |
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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 * @author Ben L. Titzer |
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34 */ |
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35 public final class LoadField extends AccessField { |
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36 |
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37 /** |
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38 * Creates a new LoadField instance. |
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39 * @param object the receiver object |
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40 * @param field the compiler interface field |
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41 * @param isStatic indicates if the field is static |
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42 * @param stateBefore the state before the field access |
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43 * @param isLoaded indicates if the class is loaded |
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44 */ |
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45 public LoadField(Value object, RiField field, boolean isStatic, FrameState stateBefore, boolean isLoaded) { |
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46 super(field.kind().stackKind(), object, field, isStatic, stateBefore, isLoaded); |
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47 } |
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48 |
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49 /** |
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50 * Gets the declared type of the field being accessed. |
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51 * @return the declared type of the field being accessed. |
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52 */ |
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53 @Override |
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54 public RiType declaredType() { |
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55 return field().type(); |
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56 } |
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57 |
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58 /** |
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59 * Gets the exact type of the field being accessed. If the field type is |
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60 * a primitive array or an instance class and the class is loaded and final, |
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61 * then the exact type is the same as the declared type. Otherwise it is {@code null} |
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62 * @return the exact type of the field if known; {@code null} otherwise |
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63 */ |
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64 @Override |
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65 public RiType exactType() { |
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66 RiType declaredType = declaredType(); |
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67 return declaredType.isResolved() ? declaredType.exactType() : null; |
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68 } |
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69 |
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70 @Override |
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71 public void accept(ValueVisitor v) { |
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72 v.visitLoadField(this); |
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73 } |
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74 |
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75 /** |
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76 * Gets a constant value to which this load can be reduced. |
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77 * |
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78 * @return {@code null} if this load cannot be reduced to a constant |
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79 */ |
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80 public CiConstant constantValue() { |
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81 if (isStatic()) { |
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82 return field.constantValue(null); |
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83 } else if (object().isConstant()) { |
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84 CiConstant cons = field.constantValue(object().asConstant()); |
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85 if (cons != null) { |
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86 return cons; |
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87 } |
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88 return cons; |
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89 } |
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90 return null; |
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91 } |
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92 |
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93 @Override |
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94 public void print(LogStream out) { |
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95 out.print(object()). |
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96 print("."). |
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97 print(field.name()). |
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98 print(" [field: "). |
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99 print(CiUtil.format("%h.%n:%t", field, false)). |
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100 print("]"); |
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101 } |
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102 } |