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annotate graal/GraalCompiler/src/com/sun/c1x/ir/Local.java @ 2827:bd17ac598c6e

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Graph cloning, initial version (not completely working)
author Lukas Stadler <lukas.stadler@jku.at>
date Mon, 30 May 2011 18:46:57 +0200
parents 015be60afcf3
children bfce42cd9c07 caf55daa41dc
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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.debug.*;
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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 Local} instruction is a placeholder for an incoming argument
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32 * to a function call.
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33 */
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34 public final class Local extends Value {
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35
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36 private static final int INPUT_COUNT = 1;
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37
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38 private static final int SUCCESSOR_COUNT = 0;
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39
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40 private final int index;
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41 private RiType declaredType;
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42
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43 public Local(CiKind kind, int javaIndex, Graph graph) {
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44 super(kind, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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45 this.index = javaIndex;
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46 this.inputs().set(0, graph.start());
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47 }
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48
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49 /**
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50 * Gets the index of this local.
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51 * @return the index
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52 */
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53 public int index() {
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54 return index;
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55 }
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56
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57 /**
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58 * Sets the declared type of this local, e.g. derived from the signature of the method.
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59 * @param declaredType the declared type of the local variable
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60 */
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61 public void setDeclaredType(RiType declaredType) {
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62 this.declaredType = declaredType;
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63 }
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64
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65 /**
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66 * Computes the declared type of the result of this instruction, if possible.
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67 * @return the declared type of the result of this instruction, if it is known; {@code null} otherwise
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68 */
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69 @Override
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70 public RiType declaredType() {
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71 return declaredType;
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72 }
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73
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74 @Override
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75 public void accept(ValueVisitor v) {
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76 v.visitLocal(this);
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77 }
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78
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79 @Override
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80 public void print(LogStream out) {
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81 out.print("local[index ").print(index()).print(']');
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82 }
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83
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84 @Override
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85 protected int inputCount() {
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86 return super.inputCount() + INPUT_COUNT;
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87 }
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88
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89 @Override
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90 protected int successorCount() {
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91 return super.successorCount() + SUCCESSOR_COUNT;
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92 }
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93
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94 @Override
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95 public Node copy(Graph into) {
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96 Local x = new Local(kind, index, into);
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97 x.setDeclaredType(declaredType());
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98 x.setNonNull(isNonNull());
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99 return x;
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100 }
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101
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102
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103 }