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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/java/MethodCallTargetNode.java @ 16811:5d468add216f

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added @NodeInfo annotations to all Node classes
author Doug Simon <doug.simon@oracle.com>
date Wed, 13 Aug 2014 18:25:45 +0200
parents 2b63e51e7789
children cbd42807a31f
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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.graal.nodes.java;
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24
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25 import com.oracle.graal.api.meta.*;
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26 import com.oracle.graal.compiler.common.type.*;
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27 import com.oracle.graal.graph.*;
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28 import com.oracle.graal.graph.spi.*;
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29 import com.oracle.graal.nodes.*;
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30 import com.oracle.graal.nodes.type.*;
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31
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32 @NodeInfo
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33 public class MethodCallTargetNode extends CallTargetNode implements IterableNodeType, Canonicalizable {
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34 private final JavaType returnType;
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35
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36 /**
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37 * @param arguments
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38 */
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39 public MethodCallTargetNode(InvokeKind invokeKind, ResolvedJavaMethod targetMethod, ValueNode[] arguments, JavaType returnType) {
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40 super(arguments, targetMethod, invokeKind);
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41 this.returnType = returnType;
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42 }
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43
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44 /**
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45 * Gets the instruction that produces the receiver object for this invocation, if any.
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46 *
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47 * @return the instruction that produces the receiver object for this invocation if any,
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48 * {@code null} if this invocation does not take a receiver object
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49 */
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50 public ValueNode receiver() {
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51 return isStatic() ? null : arguments().get(0);
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52 }
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53
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54 /**
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55 * Checks whether this is an invocation of a static method.
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56 *
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57 * @return {@code true} if the invocation is a static invocation
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58 */
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59 public boolean isStatic() {
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60 return invokeKind() == InvokeKind.Static;
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61 }
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62
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63 public Kind returnKind() {
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64 return targetMethod().getSignature().getReturnKind();
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65 }
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66
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67 public Invoke invoke() {
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68 return (Invoke) this.usages().first();
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69 }
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70
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71 @Override
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72 public boolean verify() {
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73 assert usages().count() <= 1 : "call target may only be used by a single invoke";
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74 for (Node n : usages()) {
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75 assertTrue(n instanceof Invoke, "call target can only be used from an invoke (%s)", n);
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76 }
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77 if (invokeKind() == InvokeKind.Special || invokeKind() == InvokeKind.Static) {
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78 assertFalse(targetMethod().isAbstract(), "special calls or static calls are only allowed for concrete methods (%s)", targetMethod());
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79 }
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80 if (invokeKind() == InvokeKind.Static) {
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81 assertTrue(targetMethod().isStatic(), "static calls are only allowed for static methods (%s)", targetMethod());
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82 } else {
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83 assertFalse(targetMethod().isStatic(), "static calls are only allowed for non-static methods (%s)", targetMethod());
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84 }
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85 return super.verify();
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86 }
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87
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88 @Override
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89 public String toString(Verbosity verbosity) {
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90 if (verbosity == Verbosity.Long) {
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91 return super.toString(Verbosity.Short) + "(" + targetMethod() + ")";
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92 } else {
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93 return super.toString(verbosity);
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94 }
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95 }
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96
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97 @Override
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98 public Node canonical(CanonicalizerTool tool) {
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99 if (invokeKind() == InvokeKind.Interface || invokeKind() == InvokeKind.Virtual) {
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100 // attempt to devirtualize the call
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101
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102 // check for trivial cases (e.g. final methods, nonvirtual methods)
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103 if (targetMethod().canBeStaticallyBound()) {
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104 setInvokeKind(InvokeKind.Special);
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105 return this;
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106 }
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107
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108 // check if the type of the receiver can narrow the result
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109 ValueNode receiver = receiver();
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110 ResolvedJavaType type = StampTool.typeOrNull(receiver);
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111 if (type != null && (invoke().stateAfter() != null || invoke().stateDuring() != null)) {
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112 /*
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113 * either the holder class is exact, or the receiver object has an exact type, or
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114 * it's an array type
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115 */
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116 ResolvedJavaMethod resolvedMethod = type.resolveMethod(targetMethod(), invoke().getContextType());
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117 if (resolvedMethod != null && (resolvedMethod.canBeStaticallyBound() || StampTool.isExactType(receiver) || type.isArray())) {
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118 setInvokeKind(InvokeKind.Special);
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119 setTargetMethod(resolvedMethod);
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120 return this;
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121 }
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122 if (tool.assumptions() != null && tool.assumptions().useOptimisticAssumptions()) {
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123 ResolvedJavaType uniqueConcreteType = type.findUniqueConcreteSubtype();
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124 if (uniqueConcreteType != null) {
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125 ResolvedJavaMethod methodFromUniqueType = uniqueConcreteType.resolveMethod(targetMethod(), invoke().getContextType());
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126 if (methodFromUniqueType != null) {
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127 tool.assumptions().recordConcreteSubtype(type, uniqueConcreteType);
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128 setInvokeKind(InvokeKind.Special);
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129 setTargetMethod(methodFromUniqueType);
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130 return this;
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131 }
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132 }
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133
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134 ResolvedJavaMethod uniqueConcreteMethod = type.findUniqueConcreteMethod(targetMethod());
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135 if (uniqueConcreteMethod != null) {
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136 tool.assumptions().recordConcreteMethod(targetMethod(), type, uniqueConcreteMethod);
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137 setInvokeKind(InvokeKind.Special);
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138 setTargetMethod(uniqueConcreteMethod);
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139 return this;
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140 }
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141 }
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142 }
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143 }
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144 return this;
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145 }
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146
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147 @Override
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148 public Stamp returnStamp() {
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149 Kind returnKind = targetMethod().getSignature().getReturnKind();
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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150 if (returnKind == Kind.Object && returnType instanceof ResolvedJavaType) {
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151 return StampFactory.declared((ResolvedJavaType) returnType);
5283
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parents: 5061
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152 } else {
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153 return StampFactory.forKind(returnKind);
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154 }
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155 }
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156
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157 public JavaType returnType() {
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158 return returnType;
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159 }
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160
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161 @Override
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162 public String targetName() {
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163 if (targetMethod() == null) {
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164 return "??Invalid!";
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165 }
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parents: 16174
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166 return targetMethod().format("%h.%n");
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167 }
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
168
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parents: 7123
diff changeset
169 public static MethodCallTargetNode find(StructuredGraph graph, ResolvedJavaMethod method) {
79a7b761755c Added getLineNumberTable and getFileName capabilities.
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parents: 7123
diff changeset
170 for (MethodCallTargetNode target : graph.getNodes(MethodCallTargetNode.class)) {
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parents: 16563
diff changeset
171 if (target.targetMethod().equals(method)) {
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parents: 7123
diff changeset
172 return target;
79a7b761755c Added getLineNumberTable and getFileName capabilities.
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parents: 7123
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173 }
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174 }
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175 return null;
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176 }
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177 }