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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/CallNode.java @ 13847:e86d32f4803f

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Truffle: Implement cache for truffle inlining heuristic.
author Christian Humer <christian.humer@gmail.com>
date Fri, 31 Jan 2014 16:09:50 +0100
parents 641f22b1c6b8
children f46cab39a9a2
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1 /*
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2 * Copyright (c) 2012, 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. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.nodes;
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26
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27 import com.oracle.truffle.api.*;
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28 import com.oracle.truffle.api.frame.*;
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29 import com.oracle.truffle.api.impl.*;
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30
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31 /**
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32 * This node represents a call to a static {@link CallTarget}. This node should be used whenever a
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33 * {@link CallTarget} is considered constant at a certain location in the tree. This enables the
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34 * Truffle runtime to perform inlining or other optimizations for this call-site.
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35 *
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36 * @see #create(CallTarget) to create a CallNode instance.
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37 */
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38 public abstract class CallNode extends Node {
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39
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40 protected final CallTarget callTarget;
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41
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42 private CallNode(CallTarget callTarget) {
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43 this.callTarget = callTarget;
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44 }
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45
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46 /**
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47 * @return the constant {@link CallTarget} that is associated with this {@link CallNode}.
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48 */
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49 public CallTarget getCallTarget() {
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50 return callTarget;
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51 }
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52
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53 /**
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54 * Calls this constant target passing a caller frame and arguments.
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55 *
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56 * @param caller the caller frame
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57 * @param arguments the arguments that should be passed to the callee
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58 * @return the return result of the call
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59 */
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60 public abstract Object call(PackedFrame caller, Arguments arguments);
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61
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62 /**
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63 * Returns <code>true</code> if the {@link CallTarget} contained in this {@link CallNode} can be
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64 * inlined. A {@link CallTarget} is considered inlinable if it was created using
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65 * {@link TruffleRuntime#createCallTarget(RootNode)} and if the enclosed {@link RootNode}
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66 * returns <code>true</code> for {@link RootNode#isInlinable()}.
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67 */
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68 public abstract boolean isInlinable();
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69
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70 /**
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71 * @return true if this {@link CallNode} was already inlined.
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72 */
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73 public abstract boolean isInlined();
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74
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75 /**
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76 * Enforces an inlining optimization on this {@link CallNode} instance. If not performed
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77 * manually the Truffle runtime may perform inlining using an heuristic to optimize the
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78 * performance of the execution. It is recommended to implement an version of
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79 * {@link RootNode#inline()} that adapts the inlining for possible guest language specific
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80 * behavior. If the this {@link CallNode} is not inlinable or is already inlined
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81 * <code>false</code> is returned.
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82 *
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83 * @return <code>true</code> if the inlining operation was successful.
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84 */
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85 public abstract boolean inline();
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86
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87 /**
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88 * Returns the inlined root node if the call node was inlined. If the {@link CallNode} was not
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89 * inlined <code>null</code> is returned.
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90 *
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91 * @return the inlined root node returned by {@link RootNode#inline()}
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92 */
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93 public RootNode getInlinedRoot() {
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94 return null;
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95 }
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96
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97 /**
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98 * Creates a new {@link CallNode} using a {@link CallTarget}.
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99 *
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100 * @param target the {@link CallTarget} to call
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101 * @return a call node that calls the provided target
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102 */
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103 public static CallNode create(CallTarget target) {
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104 if (isInlinable(target)) {
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105 return new InlinableCallNode((RootCallTarget) target);
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106 } else {
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107 return new DefaultCallNode(target);
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108 }
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109 }
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110
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111 /**
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112 * Warning: this is internal API and may change without notice.
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113 */
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114 public interface CompilerCallView {
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115
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116 int getCallCount();
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117
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118 void resetCallCount();
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119
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120 void store(Object value);
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121
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122 Object load();
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123 }
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124
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125 /**
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126 * Warning: this is internal API and may change without notice.
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127 */
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128 public CompilerCallView getCompilerCallView() {
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129 return null;
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130 }
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131
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132 private static boolean isInlinable(CallTarget callTarget) {
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133 if (callTarget instanceof RootCallTarget) {
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134 return (((RootCallTarget) callTarget).getRootNode()).isInlinable();
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135 }
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136 return false;
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137 }
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138
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139 @Override
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140 public String toString() {
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141 return getParent() != null ? getParent().toString() : super.toString();
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142 }
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143
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144 static final class DefaultCallNode extends CallNode {
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145
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146 public DefaultCallNode(CallTarget target) {
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147 super(target);
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148 }
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149
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150 @Override
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151 public Object call(PackedFrame caller, Arguments arguments) {
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152 return callTarget.call(caller, arguments);
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153 }
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154
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155 @Override
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156 public boolean inline() {
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157 return false;
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158 }
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159
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160 @Override
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161 public boolean isInlinable() {
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162 return false;
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163 }
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164
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165 @Override
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166 public boolean isInlined() {
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167 return false;
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168 }
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169
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170 }
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171
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172 static final class InlinableCallNode extends CallNode implements CompilerCallView {
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173
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174 private int callCount;
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175
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176 public InlinableCallNode(RootCallTarget target) {
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177 super(target);
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178 }
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179
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180 @Override
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181 public Object call(PackedFrame parentFrame, Arguments arguments) {
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182 if (CompilerDirectives.inInterpreter()) {
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183 callCount++;
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184 }
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185 return callTarget.call(parentFrame, arguments);
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186 }
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187
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188 @Override
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189 public boolean inline() {
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190 DefaultCallTarget defaultTarget = (DefaultCallTarget) getCallTarget();
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191 RootNode originalRootNode = defaultTarget.getRootNode();
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192 if (originalRootNode.isInlinable()) {
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193 RootNode inlinedRootNode = defaultTarget.getRootNode().inline();
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194 inlinedRootNode.setCallTarget(callTarget);
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195 inlinedRootNode.setParentInlinedCall(this);
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196 replace(new InlinedCallNode(defaultTarget, inlinedRootNode));
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197 return true;
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198 }
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199 return false;
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200 }
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201
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202 @Override
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203 public boolean isInlined() {
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204 return false;
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205 }
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206
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207 @Override
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208 public boolean isInlinable() {
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209 return true;
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210 }
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211
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212 @Override
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213 public CompilerCallView getCompilerCallView() {
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214 return this;
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215 }
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216
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217 /* Truffle internal API. */
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218 public int getCallCount() {
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219 return callCount;
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220 }
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221
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222 /* Truffle internal API. */
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223 public void resetCallCount() {
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224 callCount = 0;
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225 }
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226
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227 private Object storedCompilerInfo;
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228
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229 public void store(Object value) {
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230 this.storedCompilerInfo = value;
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231 }
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232
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233 public Object load() {
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234 return storedCompilerInfo;
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235 }
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236
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237 }
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238
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239 static final class InlinedCallNode extends CallNode {
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240
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241 private final RootNode inlinedRoot;
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242
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243 public InlinedCallNode(DefaultCallTarget callTarget, RootNode inlinedRoot) {
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244 super(callTarget);
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245 this.inlinedRoot = inlinedRoot;
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246 }
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247
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248 @Override
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249 public Object call(PackedFrame caller, Arguments arguments) {
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250 return inlinedRoot.execute(Truffle.getRuntime().createVirtualFrame(caller, arguments, inlinedRoot.getFrameDescriptor()));
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251 }
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252
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253 @Override
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254 public InlinedCallNode copy() {
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255 return new InlinedCallNode((DefaultCallTarget) getCallTarget(), NodeUtil.cloneNode(inlinedRoot));
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256 }
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257
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258 @Override
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259 public RootNode getInlinedRoot() {
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260 return inlinedRoot;
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261 }
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262
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263 @Override
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264 public boolean inline() {
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265 return false;
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266 }
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267
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268 @Override
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269 public boolean isInlinable() {
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270 return true;
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271 }
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272
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273 @Override
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274 public boolean isInlined() {
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275 return true;
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276 }
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277
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278 }
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279
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280 }