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annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/CallNode.java @ 12752:71991b7a0f14

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SL: Enhanced SimpleLanguage with support for if statements, function calls, function caching + inlining and builtins.
author Christian Humer <christian.humer@gmail.com>
date Mon, 11 Nov 2013 21:34:44 +0100
parents
children 06afa0db90b3
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12752
71991b7a0f14 SL: Enhanced SimpleLanguage with support for if statements, function calls, function caching + inlining and builtins.
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1 /*
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2 * Copyright (c) 2012, 2012, 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
71991b7a0f14 SL: Enhanced SimpleLanguage with support for if statements, function calls, function caching + inlining and builtins.
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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.truffle.sl.nodes;
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24
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25 import com.oracle.truffle.api.*;
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26 import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
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27 import com.oracle.truffle.api.frame.*;
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28 import com.oracle.truffle.api.impl.*;
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29 import com.oracle.truffle.api.nodes.*;
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30 import com.oracle.truffle.sl.runtime.*;
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31
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32 public abstract class CallNode extends TypedNode {
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33
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34 private static final int INLINE_CACHE_SIZE = 2;
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35
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36 @Child protected TypedNode functionNode;
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37
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38 private CallNode(TypedNode functionNode) {
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39 this.functionNode = adoptChild(functionNode);
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40 }
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41
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42 private CallTarget executeCallTargetNode(VirtualFrame frame) {
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43 try {
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44 return functionNode.executeCallTarget(frame);
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45 } catch (UnexpectedResultException e) {
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46 throw new UnsupportedOperationException("Call to " + e.getMessage() + " not supported.");
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47 }
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48 }
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49
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50 @Override
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51 public final Object executeGeneric(VirtualFrame frame) {
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52 return executeGeneric(frame, executeCallTargetNode(frame));
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53 }
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54
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55 public abstract Object executeGeneric(VirtualFrame frame, CallTarget function);
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56
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57 public static CallNode create(TypedNode function, TypedNode[] arguments) {
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58 return new UninitializedCallNode(function, new ArgumentsNode(arguments), 0);
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59 }
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60
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61 private static final class CachedCallNode extends CallNode {
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62
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63 @Child protected CallNode nextNode;
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64 @Child protected TypedNode currentNode;
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65 private final CallTarget cachedFunction;
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66
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67 public CachedCallNode(TypedNode function, TypedNode current, CallNode next, CallTarget cachedFunction) {
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68 super(function);
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69 this.currentNode = adoptChild(current);
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70 this.nextNode = adoptChild(next);
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71 this.cachedFunction = cachedFunction;
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72 }
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73
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74 @Override
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75 public Object executeGeneric(VirtualFrame frame, CallTarget function) {
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76 if (this.cachedFunction == function) {
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77 return currentNode.executeGeneric(frame);
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78 }
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79 return nextNode.executeGeneric(frame, function);
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80 }
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81 }
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82
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83 private static final class UninitializedCallNode extends CallNode {
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84
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85 @Child protected ArgumentsNode uninitializedArgs;
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86 protected final int depth;
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87
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88 UninitializedCallNode(TypedNode function, ArgumentsNode args, int depth) {
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89 super(function);
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90 this.uninitializedArgs = adoptChild(args);
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91 this.depth = depth;
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92 }
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93
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94 UninitializedCallNode(UninitializedCallNode copy) {
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95 super(null);
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96 this.uninitializedArgs = adoptChild(copy.uninitializedArgs);
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97 this.depth = copy.depth + 1;
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98 }
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99
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100 @Override
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101 public Object executeGeneric(VirtualFrame frame, CallTarget function) {
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102 CompilerDirectives.transferToInterpreter();
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103 return specialize(function).executeGeneric(frame, function);
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104 }
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105
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106 private CallNode specialize(CallTarget function) {
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107 CompilerAsserts.neverPartOfCompilation();
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108
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109 if (depth < INLINE_CACHE_SIZE) {
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110 TypedNode current = createCacheNode(function);
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111 CallNode next = new UninitializedCallNode(this);
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112 return replace(new CachedCallNode(this.functionNode, current, next, function));
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113 } else {
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114 CallNode topMost = (CallNode) getTopNode();
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115 return topMost.replace(new GenericCallNode(topMost.functionNode, uninitializedArgs));
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116 }
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117 }
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118
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119 protected Node getTopNode() {
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120 Node parentNode = this;
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121 for (int i = 0; i < depth; i++) {
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122 parentNode = parentNode.getParent();
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123 }
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124 return parentNode;
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125 }
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126
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127 protected TypedNode createCacheNode(CallTarget function) {
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128 ArgumentsNode clonedArgs = NodeUtil.cloneNode(uninitializedArgs);
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129
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130 if (function instanceof DefaultCallTarget) {
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131 DefaultCallTarget defaultFunction = (DefaultCallTarget) function;
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132 RootNode rootNode = defaultFunction.getRootNode();
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133 if (rootNode instanceof FunctionRootNode) {
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134 FunctionRootNode root = (FunctionRootNode) rootNode;
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135 if (root.isAlwaysInline()) {
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136 TypedNode inlinedCall = root.inline(clonedArgs);
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137 if (inlinedCall != null) {
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138 return inlinedCall;
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139 }
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140 }
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141 return new InlinableCallNode((DefaultCallTarget) function, clonedArgs);
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142 }
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143 }
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144
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145 // got a call target that is not inlinable (should not occur for SL)
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146 return new DispatchedCallNode(function, clonedArgs);
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147 }
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148 }
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149
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150 private static final class InlinableCallNode extends DispatchedCallNode implements InlinableCallSite {
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151
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152 private final DefaultCallTarget inlinableTarget;
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153
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154 @CompilationFinal private int callCount;
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155
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156 InlinableCallNode(DefaultCallTarget function, ArgumentsNode arguments) {
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157 super(function, arguments);
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158 this.inlinableTarget = function;
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159 }
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160
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161 @Override
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162 public int getCallCount() {
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163 return callCount;
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164 }
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165
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166 @Override
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167 public void resetCallCount() {
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168 callCount = 0;
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169 }
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170
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171 @Override
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172 public Node getInlineTree() {
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173 RootNode root = inlinableTarget.getRootNode();
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174 if (root instanceof FunctionRootNode) {
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175 return ((FunctionRootNode) root).getUninitializedBody();
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176 }
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177 return null;
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178 }
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179
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180 @Override
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181 public boolean inline(FrameFactory factory) {
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182 CompilerAsserts.neverPartOfCompilation();
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183 TypedNode functionCall = null;
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184
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185 RootNode root = inlinableTarget.getRootNode();
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186 if (root instanceof FunctionRootNode) {
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187 functionCall = ((FunctionRootNode) root).inline(NodeUtil.cloneNode(args));
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188 }
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189 if (functionCall != null) {
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190 this.replace(functionCall);
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191 return true;
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192 } else {
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193 return false;
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194 }
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195 }
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196
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197 @Override
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198 public Object executeGeneric(VirtualFrame frame) {
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199 if (CompilerDirectives.inInterpreter()) {
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200 callCount++;
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201 }
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202 return super.executeGeneric(frame);
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203 }
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204
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205 @Override
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206 public CallTarget getCallTarget() {
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207 return inlinableTarget;
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208 }
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209
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210 }
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211
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212 private static class DispatchedCallNode extends TypedNode {
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213
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214 @Child protected ArgumentsNode args;
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215 protected final CallTarget function;
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216
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217 DispatchedCallNode(CallTarget function, ArgumentsNode arguments) {
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218 this.args = adoptChild(arguments);
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219 this.function = function;
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220 }
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221
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222 @Override
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223 public Object executeGeneric(VirtualFrame frame) {
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224 SLArguments argsObject = new SLArguments(args.executeArray(frame));
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225 return function.call(frame.pack(), argsObject);
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226 }
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227 }
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228
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229 private static final class GenericCallNode extends CallNode {
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230
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231 @Child protected ArgumentsNode args;
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232
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233 GenericCallNode(TypedNode functionNode, ArgumentsNode arguments) {
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234 super(functionNode);
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235 this.args = adoptChild(arguments);
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236 }
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237
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238 @Override
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239 public Object executeGeneric(VirtualFrame frame, CallTarget function) {
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240 SLArguments argsObject = new SLArguments(args.executeArray(frame));
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241 return function.call(frame.pack(), argsObject);
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242 }
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243 }
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244
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245 }