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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/LoadFieldNode.java @ 19997:58f2aad37d0e

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Further improvements to IGV. Make displayed names of nodes shorter.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Mon, 23 Mar 2015 00:26:37 +0100
parents 8fc336a04d77
children 5b2fd4cd7b8f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2009, 2015, 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.java;
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24
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25 import static com.oracle.graal.graph.iterators.NodePredicates.*;
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26
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27 import com.oracle.graal.api.meta.*;
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28 import com.oracle.graal.compiler.common.type.*;
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29 import com.oracle.graal.graph.*;
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30 import com.oracle.graal.graph.spi.*;
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31 import com.oracle.graal.nodeinfo.*;
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32 import com.oracle.graal.nodes.*;
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33 import com.oracle.graal.nodes.spi.*;
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34 import com.oracle.graal.nodes.type.*;
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35 import com.oracle.graal.nodes.virtual.*;
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36
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37 /**
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38 * The {@code LoadFieldNode} represents a read of a static or instance field.
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39 */
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40 @NodeInfo(nameTemplate = "#{p#field/s}")
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41 public final class LoadFieldNode extends AccessFieldNode implements Canonicalizable.Unary<ValueNode>, VirtualizableRoot, UncheckedInterfaceProvider {
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42
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43 public static final NodeClass<LoadFieldNode> TYPE = NodeClass.create(LoadFieldNode.class);
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44
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45 public LoadFieldNode(ValueNode object, ResolvedJavaField field) {
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46 super(TYPE, createStamp(field), object, field);
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47 }
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48
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49 public ValueNode getValue() {
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50 return object();
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51 }
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52
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53 private static Stamp createStamp(ResolvedJavaField field) {
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54 Kind kind = field.getKind();
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55 if (kind == Kind.Object && field.getType() instanceof ResolvedJavaType) {
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56 return StampFactory.declared((ResolvedJavaType) field.getType());
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57 } else {
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58 return StampFactory.forKind(kind);
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59 }
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60 }
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61
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62 public ValueNode canonical(CanonicalizerTool tool, ValueNode forObject) {
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63 if (hasNoUsages() && !isVolatile() && (isStatic() || StampTool.isPointerNonNull(forObject.stamp()))) {
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64 return null;
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65 }
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66 MetaAccessProvider metaAccess = tool.getMetaAccess();
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67 ConstantReflectionProvider constantReflection = tool.getConstantReflection();
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68 if (tool.canonicalizeReads() && metaAccess != null) {
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69 ConstantNode constant = asConstant(metaAccess, constantReflection, forObject);
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70 if (constant != null) {
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71 return constant;
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72 }
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73 PhiNode phi = asPhi(metaAccess, constantReflection, forObject);
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74 if (phi != null) {
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75 return phi;
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76 }
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77 }
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78 if (!isStatic() && forObject.isNullConstant()) {
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79 return new DeoptimizeNode(DeoptimizationAction.None, DeoptimizationReason.NullCheckException);
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80 }
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81 return this;
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82 }
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83
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84 /**
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85 * Gets a constant value for this load if possible.
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86 */
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87 public ConstantNode asConstant(MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection, ValueNode forObject) {
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88 JavaConstant constant = null;
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89 if (isStatic()) {
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90 constant = constantReflection.readConstantFieldValue(field(), null);
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91 } else if (forObject.isConstant() && !forObject.isNullConstant()) {
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92 constant = constantReflection.readConstantFieldValue(field(), forObject.asJavaConstant());
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93 }
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94 if (constant != null) {
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95 return ConstantNode.forConstant(constant, metaAccess);
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96 }
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97 return null;
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98 }
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99
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100 private PhiNode asPhi(MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection, ValueNode forObject) {
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101 if (!isStatic() && field.isFinal() && forObject instanceof ValuePhiNode && ((ValuePhiNode) forObject).values().filter(isNotA(ConstantNode.class)).isEmpty()) {
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102 PhiNode phi = (PhiNode) forObject;
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103 JavaConstant[] constants = new JavaConstant[phi.valueCount()];
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104 for (int i = 0; i < phi.valueCount(); i++) {
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105 JavaConstant constantValue = constantReflection.readConstantFieldValue(field(), phi.valueAt(i).asJavaConstant());
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106 if (constantValue == null) {
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107 return null;
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108 }
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109 constants[i] = constantValue;
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110 }
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111 ConstantNode[] constantNodes = new ConstantNode[phi.valueCount()];
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112 for (int i = 0; i < phi.valueCount(); i++) {
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113 constantNodes[i] = ConstantNode.forConstant(constants[i], metaAccess);
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114 }
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115 return new ValuePhiNode(stamp(), phi.merge(), constantNodes);
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116 }
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117 return null;
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118 }
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119
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120 @Override
6db6881c1270 add Virtualizable and VirtualizerTool, refactor PEA to use it
Lukas Stadler <lukas.stadler@jku.at>
parents: 6539
diff changeset
121 public void virtualize(VirtualizerTool tool) {
7394
94f032472c28 changed PEA interface:
Lukas Stadler <lukas.stadler@jku.at>
parents: 6710
diff changeset
122 State state = tool.getObjectState(object());
94f032472c28 changed PEA interface:
Lukas Stadler <lukas.stadler@jku.at>
parents: 6710
diff changeset
123 if (state != null && state.getState() == EscapeState.Virtual) {
94f032472c28 changed PEA interface:
Lukas Stadler <lukas.stadler@jku.at>
parents: 6710
diff changeset
124 int fieldIndex = ((VirtualInstanceNode) state.getVirtualObject()).fieldIndex(field());
6710
6db6881c1270 add Virtualizable and VirtualizerTool, refactor PEA to use it
Lukas Stadler <lukas.stadler@jku.at>
parents: 6539
diff changeset
125 if (fieldIndex != -1) {
7394
94f032472c28 changed PEA interface:
Lukas Stadler <lukas.stadler@jku.at>
parents: 6710
diff changeset
126 tool.replaceWith(state.getEntry(fieldIndex));
6710
6db6881c1270 add Virtualizable and VirtualizerTool, refactor PEA to use it
Lukas Stadler <lukas.stadler@jku.at>
parents: 6539
diff changeset
127 }
6db6881c1270 add Virtualizable and VirtualizerTool, refactor PEA to use it
Lukas Stadler <lukas.stadler@jku.at>
parents: 6539
diff changeset
128 }
6db6881c1270 add Virtualizable and VirtualizerTool, refactor PEA to use it
Lukas Stadler <lukas.stadler@jku.at>
parents: 6539
diff changeset
129 }
18467
1d2e382d8259 Add UncheckedInterfaceProvider interface for nodes that can give an unchecked hint about the interface type they are likely to return.
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 18465
diff changeset
130
1d2e382d8259 Add UncheckedInterfaceProvider interface for nodes that can give an unchecked hint about the interface type they are likely to return.
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 18465
diff changeset
131 public Stamp uncheckedStamp() {
1d2e382d8259 Add UncheckedInterfaceProvider interface for nodes that can give an unchecked hint about the interface type they are likely to return.
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 18465
diff changeset
132 return UncheckedInterfaceProvider.uncheckedOrNull(field().getType(), stamp());
1d2e382d8259 Add UncheckedInterfaceProvider interface for nodes that can give an unchecked hint about the interface type they are likely to return.
Gilles Duboscq <duboscq@ssw.jku.at>
parents: 18465
diff changeset
133 }
3733
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff changeset
134 }