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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/extended/SnippetLocationNode.java @ 11881:da9db8331658

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moved Canonicalizable and Simplifiable to the com.oracle.graal.graph project (GRAAL-506)
author Doug Simon <doug.simon@oracle.com>
date Tue, 01 Oct 2013 20:38:25 +0200
parents 9a747d8e0d0f
children 1cf373d2b415
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9524
ff8d87eabda8 Refactor the LocationNode class hierarchy to allow a SnippetLocationNode, i.e., a LocationNode that can be used in snippets without requiring the individual components to be constants at the time the snippet is prepared
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1 /*
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2 * Copyright (c) 2013, 2013, 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.graal.nodes.extended;
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24
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25 import static com.oracle.graal.api.meta.LocationIdentity.*;
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27 import com.oracle.graal.api.meta.*;
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28 import com.oracle.graal.graph.*;
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29 import com.oracle.graal.graph.spi.*;
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30 import com.oracle.graal.nodes.*;
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31 import com.oracle.graal.nodes.spi.*;
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32 import com.oracle.graal.nodes.type.*;
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33
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34 /**
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35 * Location node that can be used inside a snippet without having the elements (including the
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36 * location identity and kind) as a snippet constant. Can represent locations in the form of [base +
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37 * index * scale + disp]. When the location is created, all elements (base, index, scale, disp) are
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38 * nodes. Both scale and disp must eventually canonicalize to {@link ConstantNode constants} so that
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39 * this node can be canonicalized to a {@link IndexedLocationNode} or {@link ConstantLocationNode}.
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40 */
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41 public final class SnippetLocationNode extends LocationNode implements Canonicalizable {
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42
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43 @Input private ValueNode valueKind;
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44 @Input private ValueNode locationIdentity;
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45 @Input private ValueNode displacement;
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46 @Input private ValueNode index;
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47 @Input private ValueNode indexScaling;
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48
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49 public static SnippetLocationNode create(ValueNode identity, ValueNode kind, ValueNode displacement, ValueNode index, ValueNode indexScaling, Graph graph) {
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50 return graph.unique(new SnippetLocationNode(identity, kind, displacement, index, indexScaling));
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51 }
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52
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53 private SnippetLocationNode(ValueNode locationIdentity, ValueNode kind, ValueNode displacement) {
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54 this(locationIdentity, kind, displacement, null, null);
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55 }
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56
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57 private SnippetLocationNode(ValueNode locationIdentity, ValueNode kind, ValueNode displacement, ValueNode index, ValueNode indexScaling) {
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58 super(StampFactory.object());
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59 this.valueKind = kind;
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60 this.locationIdentity = locationIdentity;
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61 this.displacement = displacement;
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62 this.index = index;
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63 this.indexScaling = indexScaling;
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64 }
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65
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66 @Override
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67 public Kind getValueKind() {
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68 if (valueKind.isConstant()) {
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69 return (Kind) valueKind.asConstant().asObject();
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70 }
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71 throw new GraalInternalError("Cannot access kind yet because it is not constant: " + valueKind);
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72 }
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73
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74 @Override
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75 public LocationIdentity getLocationIdentity() {
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76 if (locationIdentity.isConstant()) {
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77 return (LocationIdentity) locationIdentity.asConstant().asObject();
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78 }
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79 // We do not know our actual location identity yet, so be conservative.
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80 return ANY_LOCATION;
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81 }
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82
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83 @Override
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84 public Node canonical(CanonicalizerTool tool) {
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85 if (valueKind.isConstant() && locationIdentity.isConstant() && displacement.isConstant() && (indexScaling == null || indexScaling.isConstant())) {
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86 Kind constKind = (Kind) valueKind.asConstant().asObject();
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87 LocationIdentity constLocation = (LocationIdentity) locationIdentity.asConstant().asObject();
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88 long constDisplacement = displacement.asConstant().asLong();
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89 int constIndexScaling = indexScaling == null ? 0 : indexScaling.asConstant().asInt();
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90
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91 if (index == null || constIndexScaling == 0) {
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92 return ConstantLocationNode.create(constLocation, constKind, constDisplacement, graph());
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93 } else if (index.isConstant()) {
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94 return ConstantLocationNode.create(constLocation, constKind, index.asConstant().asLong() * constIndexScaling + constDisplacement, graph());
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95 } else {
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96 return IndexedLocationNode.create(constLocation, constKind, constDisplacement, index, graph(), constIndexScaling);
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97 }
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98 }
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99 return this;
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100 }
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101
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102 @Override
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103 public Value generateAddress(LIRGeneratorTool gen, Value base) {
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104 throw new GraalInternalError("locationIdentity must be a constant so that this node can be canonicalized: " + locationIdentity);
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105 }
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106
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107 @NodeIntrinsic
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108 public static native Location constantLocation(LocationIdentity identity, Kind kind, long displacement);
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109
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110 @NodeIntrinsic
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111 public static native Location indexedLocation(LocationIdentity identity, Kind kind, long displacement, int index, int indexScaling);
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112 }