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annotate graal/GraalCompiler/src/com/sun/c1x/ir/AccessIndexed.java @ 2622:91d3952f7eb7

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Framestate work : using stateAFter and reducting the number of nodes with framestates. Intermediate state (does not pass tests)
author Gilles Duboscq <gilles.duboscq@oracle.com>
date Tue, 10 May 2011 12:37:46 +0200
parents fec99fc30af1
children 569228710be8
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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.oracle.graal.graph.*;
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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
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29 /**
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30 * The {@code AccessIndexed} class is the base class of instructions that read or write
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31 * elements of an array.
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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 abstract class AccessIndexed extends AccessArray {
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36
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37 private static final int INPUT_COUNT = 2;
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38 private static final int INPUT_INDEX = 0;
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39 private static final int INPUT_LENGTH = 1;
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40
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41 private static final int SUCCESSOR_COUNT = 0;
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42
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43 @Override
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44 protected int inputCount() {
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45 return super.inputCount() + INPUT_COUNT;
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46 }
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47
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48 @Override
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49 protected int successorCount() {
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50 return super.successorCount() + SUCCESSOR_COUNT;
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51 }
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52
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53 /**
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54 * The instruction producing the index into the array.
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55 */
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56 public Value index() {
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57 return (Value) inputs().get(super.inputCount() + INPUT_INDEX);
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58 }
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59
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60 public Value setIndex(Value n) {
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61 return (Value) inputs().set(super.inputCount() + INPUT_INDEX, n);
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62 }
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63
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64 /**
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65 * The instruction that produces the length of the array.
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66 */
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67 public Value length() {
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68 return (Value) inputs().get(super.inputCount() + INPUT_LENGTH);
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69 }
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70
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71 public Value setLength(Value n) {
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72 return (Value) inputs().set(super.inputCount() + INPUT_LENGTH, n);
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73 }
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74
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75 private final CiKind elementType;
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76
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77 /**
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78 * Create an new AccessIndexed instruction.
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79 * @param kind the result kind of the access
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80 * @param array the instruction producing the array
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81 * @param index the instruction producing the index
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82 * @param length the instruction producing the length (used in bounds check elimination?)
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83 * @param elementType the type of the elements of the array
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84 * @param stateBefore the state before executing this instruction
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85 * @param inputCount
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86 * @param successorCount
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87 * @param graph
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88 */
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89 AccessIndexed(CiKind kind, Value array, Value index, Value length, CiKind elementType, FrameState stateAfter, int inputCount, int successorCount, Graph graph) {
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90 super(kind, array, stateAfter, inputCount + INPUT_COUNT, successorCount + SUCCESSOR_COUNT, graph);
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91 setIndex(index);
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92 setLength(length);
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93 this.elementType = elementType;
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94 }
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95
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96 /**
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97 * Gets the element type of the array.
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98 * @return the element type
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99 */
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100 public CiKind elementKind() {
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101 return elementType;
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102 }
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103
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104 }