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annotate graal/GraalCompiler/src/com/sun/c1x/ir/StoreIndexed.java @ 2509:16b9a8b5ad39

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Renamings Runtime=>GraalRuntime and Compiler=>GraalCompiler
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Wed, 27 Apr 2011 11:50:44 +0200
parents graal/Compiler/src/com/sun/c1x/ir/StoreIndexed.java@9ec15d6914ca
children fa3bda50cbfd
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 static com.sun.c1x.ir.Value.Flag.*;
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26
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27 import com.sun.c1x.debug.*;
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28 import com.sun.c1x.value.*;
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29 import com.sun.cri.ci.*;
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30
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31 /**
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32 * The {@code StoreIndexed} instruction represents a write to an array element.
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33 *
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34 * @author Ben L. Titzer
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35 */
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36 public final class StoreIndexed extends AccessIndexed {
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37
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38 /**
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39 * The value to store.
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40 */
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41 Value value;
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42
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43 /**
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44 * Creates a new StoreIndexed instruction.
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45 * @param array the instruction producing the array
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46 * @param index the instruction producing the index
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47 * @param length the instruction producing the length
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48 * @param elementType the element type
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49 * @param value the value to store into the array
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50 * @param stateBefore the state before executing this instruction
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51 */
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52 public StoreIndexed(Value array, Value index, Value length, CiKind elementType, Value value, FrameState stateBefore) {
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53 super(CiKind.Void, array, index, length, elementType, stateBefore);
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54 this.value = value;
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55 setFlag(Flag.LiveStore);
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56 if (elementType != CiKind.Object) {
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57 setFlag(Flag.NoWriteBarrier);
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58 }
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59 }
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60
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61 /**
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62 * Gets the instruction that produces the value that is to be stored into the array.
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63 * @return the value to write into the array
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64 */
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65 public Value value() {
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66 return value;
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67 }
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68
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69 /**
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70 * Checks if this instruction needs a write barrier.
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71 * @return {@code true} if this instruction needs a write barrier
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72 */
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73 public boolean needsWriteBarrier() {
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74 return !checkFlag(Flag.NoWriteBarrier);
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75 }
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76
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77 /**
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78 * Checks if this instruction needs a store check.
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79 * @return {@code true} if this instruction needs a store check
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80 */
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81 public boolean needsStoreCheck() {
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82 return !checkFlag(Flag.NoStoreCheck);
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83 }
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84
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85 public void eliminateStoreCheck() {
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86 clearRuntimeCheck(NoStoreCheck);
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87 }
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88
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89 /**
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90 * Checks whether this instruction can cause a trap.
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91 * @return {@code true} if this instruction can cause a trap
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92 */
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93 @Override
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94 public boolean canTrap() {
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95 return super.canTrap() || needsStoreCheck();
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96 }
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97
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98 @Override
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99 public void inputValuesDo(ValueClosure closure) {
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100 super.inputValuesDo(closure);
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101 value = closure.apply(value);
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102 }
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103
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104 @Override
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105 public void accept(ValueVisitor v) {
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106 v.visitStoreIndexed(this);
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107 }
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108
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109 @Override
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110 public void print(LogStream out) {
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111 out.print(array()).print('[').print(index()).print("] := ").print(value()).print(" (").print(kind.typeChar).print(')');
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112 }
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113 }