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annotate graal/GraalCompiler/src/com/sun/c1x/ir/Local.java @ 2771:056e392d63d4

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Connected local variables to start node. No more need for frame state to emit locals.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Tue, 24 May 2011 09:49:04 +0200
parents 01c5c0443158
children 9253df721472
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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 private static final int SUCCESSOR_COUNT = 0;
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38
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39 private final int index;
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40 private RiType declaredType;
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41
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42 public Local(CiKind kind, int javaIndex, Graph graph) {
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43 super(kind, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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44 this.index = javaIndex;
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45 this.inputs().set(0, graph.start());
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46 }
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47
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48 @Override
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49 public BlockBegin block() {
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50 return null;
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51 }
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52
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53 /**
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54 * Gets the index of this local.
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55 * @return the index
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56 */
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57 public int index() {
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58 return index;
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59 }
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60
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61 /**
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62 * Sets the declared type of this local, e.g. derived from the signature of the method.
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63 * @param declaredType the declared type of the local variable
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64 */
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65 public void setDeclaredType(RiType declaredType) {
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66 this.declaredType = declaredType;
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67 }
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68
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69 /**
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70 * Computes the declared type of the result of this instruction, if possible.
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71 * @return the declared type of the result of this instruction, if it is known; {@code null} otherwise
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72 */
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73 @Override
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74 public RiType declaredType() {
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75 return declaredType;
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76 }
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77
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78 @Override
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79 public void accept(ValueVisitor v) {
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80 v.visitLocal(this);
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81 }
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82
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83 @Override
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84 public void print(LogStream out) {
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85 out.print("local[index ").print(index()).print(']');
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86 }
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87 }