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annotate graal/Compiler/src/com/sun/c1x/ir/StoreField.java @ 2507:9ec15d6914ca

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Pull over of compiler from maxine repository.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 11:43:22 +0200
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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 StoreField} instruction represents a write to 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 StoreField extends AccessField {
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36
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37 /**
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38 * The value to store.
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39 */
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40 Value value;
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41
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42 /**
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43 * Creates a new LoadField instance.
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44 * @param object the receiver object
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45 * @param field the compiler interface field
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46 * @param value the instruction representing the value to store to the field
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47 * @param isStatic indicates if the field is static
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48 * @param stateBefore the state before the field access
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49 * @param isLoaded indicates if the class is loaded
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50 */
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51 public StoreField(Value object, RiField field, Value value, boolean isStatic, FrameState stateBefore, boolean isLoaded) {
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52 super(CiKind.Void, object, field, isStatic, stateBefore, isLoaded);
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53 this.value = value;
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54 setFlag(Flag.LiveStore);
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55 if (value.kind != CiKind.Object) {
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56 setFlag(Flag.NoWriteBarrier);
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57 }
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58 }
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59
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60 /**
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61 * Gets the value that is written to the field.
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62 * @return the value
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63 */
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64 public Value value() {
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65 return value;
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66 }
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67
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68 /**
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69 * Checks whether this instruction needs a write barrier.
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70 * @return {@code true} if this instruction needs a write barrier
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71 */
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72 public boolean needsWriteBarrier() {
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73 return !checkFlag(Flag.NoWriteBarrier);
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74 }
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75
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76 @Override
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77 public void inputValuesDo(ValueClosure closure) {
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78 super.inputValuesDo(closure);
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79 value = closure.apply(value);
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80 }
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81
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82 @Override
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83 public void accept(ValueVisitor v) {
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84 v.visitStoreField(this);
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85 }
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86
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87 @Override
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88 public void print(LogStream out) {
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89 out.print(object()).
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90 print(".").
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91 print(field().name()).
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92 print(" := ").
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93 print(value()).
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94 print(" [type: ").print(CiUtil.format("%h.%n:%t", field(), false)).
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95 print(']');
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96 }
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97 }