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annotate graal/com.oracle.max.graal.nodes/src/com/oracle/max/graal/nodes/extended/UnboxNode.java @ 3733:e233f5660da4

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Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
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children aaac4894175c
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3733
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1 /*
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2 * Copyright (c) 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.oracle.max.graal.nodes.extended;
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24
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25 import com.oracle.max.graal.graph.*;
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26 import com.oracle.max.graal.nodes.*;
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27 import com.oracle.max.graal.nodes.java.*;
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28 import com.oracle.max.graal.nodes.spi.*;
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29 import com.oracle.max.graal.nodes.type.*;
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30 import com.sun.cri.ci.*;
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31 import com.sun.cri.ri.*;
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32
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33
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34 public final class UnboxNode extends FixedWithNextNode implements Node.IterableNodeType, Canonicalizable {
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35
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36 @Input private ValueNode source;
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37
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38 public UnboxNode(CiKind kind, ValueNode source) {
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39 super(StampFactory.forKind(kind));
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40 this.source = source;
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41 assert kind != CiKind.Object : "can only unbox to primitive";
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42 assert source.kind() == CiKind.Object : "can only unbox objects";
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43 }
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44
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45 public ValueNode source() {
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46 return source;
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47 }
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48
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49 public CiKind destinationKind() {
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50 return this.kind();
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51 }
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52
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53 public void expand(BoxingMethodPool pool) {
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54 RiResolvedField field = pool.getBoxField(kind());
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55 LoadFieldNode loadField = graph().add(new LoadFieldNode(source, field));
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56 loadField.setProbability(probability());
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57 this.replaceWithFixedWithNext(loadField);
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58 }
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59
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60 @Override
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61 public Node canonical(CanonicalizerTool tool) {
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62 if (source.isConstant()) {
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63 CiConstant constant = source.asConstant();
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64 Object o = constant.asObject();
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65 switch (kind()) {
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66 case Boolean:
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67 return ConstantNode.forBoolean((Boolean) o, graph());
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68 case Byte:
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69 return ConstantNode.forByte((Byte) o, graph());
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70 case Char:
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71 return ConstantNode.forChar((Character) o, graph());
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72 case Short:
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73 return ConstantNode.forShort((Short) o, graph());
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74 case Int:
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75 return ConstantNode.forInt((Integer) o, graph());
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76 case Long:
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77 return ConstantNode.forLong((Long) o, graph());
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78 case Float:
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79 return ConstantNode.forFloat((Long) o, graph());
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80 case Double:
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81 return ConstantNode.forDouble((Long) o, graph());
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82 default:
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83 assert false;
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84 }
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85 }
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86 return this;
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87 }
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88 }