Mercurial > hg > truffle
annotate graal/GraalCompiler/src/com/sun/c1x/value/FrameStateBuilder.java @ 2761:d3398b21faf9
Re-enabled CFG optimization (now only on LIRBlock data structure).
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Sat, 21 May 2011 17:46:54 +0200 |
parents | a2f62de90c76 |
children | 5e8a69041cd7 |
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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.sun.c1x.value; |
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24 |
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25 import static com.sun.c1x.value.ValueUtil.*; |
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26 import static java.lang.reflect.Modifier.*; |
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27 |
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28 import java.util.*; |
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29 |
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30 import com.oracle.graal.graph.*; |
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31 import com.sun.c1x.graph.*; |
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32 import com.sun.c1x.ir.*; |
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33 import com.sun.cri.ci.*; |
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34 import com.sun.cri.ri.*; |
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35 |
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36 |
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37 public class FrameStateBuilder implements FrameStateAccess { |
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38 |
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39 private final Graph graph; |
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40 |
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41 private final Value[] locals; |
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42 private final Value[] stack; |
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43 private final ArrayList<Value> locks; |
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44 |
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45 private int stackIndex; |
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46 |
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47 public FrameStateBuilder(RiMethod method, Graph graph) { |
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48 this.graph = graph; |
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49 this.locals = new Value[method.maxLocals()]; |
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50 this.stack = new Value[method.maxStackSize()]; |
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51 |
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52 int index = 0; |
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53 if (!isStatic(method.accessFlags())) { |
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54 // add the receiver and assume it is non null |
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55 Local local = new Local(method.holder().kind(), index, graph); |
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56 local.setFlag(Value.Flag.NonNull, true); |
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57 local.setDeclaredType(method.holder()); |
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58 storeLocal(index, local); |
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59 index = 1; |
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60 } |
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61 RiSignature sig = method.signature(); |
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62 int max = sig.argumentCount(false); |
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63 RiType accessingClass = method.holder(); |
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64 for (int i = 0; i < max; i++) { |
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65 RiType type = sig.argumentTypeAt(i, accessingClass); |
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66 CiKind kind = type.kind().stackKind(); |
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67 Local local = new Local(kind, index, graph); |
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68 if (type.isResolved()) { |
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69 local.setDeclaredType(type); |
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70 } |
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71 storeLocal(index, local); |
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72 index += kind.sizeInSlots(); |
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73 } |
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74 this.locks = new ArrayList<Value>(); |
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75 } |
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76 |
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77 public void initializeFrom(FrameState other) { |
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78 assert locals.length == other.localsSize(); |
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79 assert stack.length >= other.stackSize(); |
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80 |
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81 this.stackIndex = other.stackSize(); |
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82 for (int i = 0; i < other.localsSize(); i++) { |
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83 locals[i] = other.localAt(i); |
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84 } |
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85 for (int i = 0; i < other.stackSize(); i++) { |
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86 stack[i] = other.stackAt(i); |
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87 } |
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88 locks.clear(); |
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89 for (int i = 0; i < other.locksSize(); i++) { |
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90 locks.add(other.lockAt(i)); |
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91 } |
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92 } |
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93 |
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94 public FrameState create(int bci) { |
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95 return new FrameState(bci, locals, stack, stackIndex, locks, graph); |
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96 } |
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97 |
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98 @Override |
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99 public FrameState duplicateWithEmptyStack(int bci) { |
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100 return new FrameState(bci, locals, new Value[0], 0, locks, graph); |
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101 } |
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102 |
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103 /** |
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104 * Pushes an instruction onto the stack with the expected type. |
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105 * @param kind the type expected for this instruction |
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106 * @param x the instruction to push onto the stack |
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107 */ |
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108 public void push(CiKind kind, Value x) { |
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109 assert kind != CiKind.Void; |
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110 xpush(assertKind(kind, x)); |
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111 if (kind.sizeInSlots() == 2) { |
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112 xpush(null); |
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113 } |
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114 } |
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115 |
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116 /** |
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117 * Pushes a value onto the stack without checking the type. |
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118 * @param x the instruction to push onto the stack |
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119 */ |
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120 public void xpush(Value x) { |
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121 stack[stackIndex++] = x; |
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122 } |
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123 |
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124 /** |
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125 * Pushes a value onto the stack and checks that it is an int. |
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126 * @param x the instruction to push onto the stack |
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127 */ |
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128 public void ipush(Value x) { |
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129 xpush(assertInt(x)); |
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130 } |
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131 |
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132 /** |
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133 * Pushes a value onto the stack and checks that it is a float. |
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134 * @param x the instruction to push onto the stack |
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135 */ |
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136 public void fpush(Value x) { |
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137 xpush(assertFloat(x)); |
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138 } |
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139 |
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140 /** |
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141 * Pushes a value onto the stack and checks that it is an object. |
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142 * @param x the instruction to push onto the stack |
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143 */ |
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144 public void apush(Value x) { |
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145 xpush(assertObject(x)); |
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146 } |
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147 |
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148 /** |
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149 * Pushes a value onto the stack and checks that it is a word. |
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150 * @param x the instruction to push onto the stack |
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151 */ |
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152 public void wpush(Value x) { |
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153 xpush(assertWord(x)); |
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154 } |
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155 |
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156 /** |
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157 * Pushes a value onto the stack and checks that it is a JSR return address. |
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158 * @param x the instruction to push onto the stack |
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159 */ |
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160 public void jpush(Value x) { |
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161 xpush(assertJsr(x)); |
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162 } |
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163 |
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164 /** |
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165 * Pushes a value onto the stack and checks that it is a long. |
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166 * |
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167 * @param x the instruction to push onto the stack |
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168 */ |
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169 public void lpush(Value x) { |
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170 xpush(assertLong(x)); |
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171 xpush(null); |
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172 } |
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173 |
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174 /** |
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175 * Pushes a value onto the stack and checks that it is a double. |
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176 * @param x the instruction to push onto the stack |
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177 */ |
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178 public void dpush(Value x) { |
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179 xpush(assertDouble(x)); |
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180 xpush(null); |
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181 } |
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182 |
2616
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183 public void pushReturn(CiKind kind, Value x) { |
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184 if (kind != CiKind.Void) { |
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185 push(kind.stackKind(), x); |
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186 } |
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187 } |
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188 |
2611
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189 /** |
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190 * Pops an instruction off the stack with the expected type. |
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191 * @param kind the expected type |
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192 * @return the instruction on the top of the stack |
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193 */ |
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194 public Value pop(CiKind kind) { |
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195 assert kind != CiKind.Void; |
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196 if (kind.sizeInSlots() == 2) { |
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197 xpop(); |
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198 } |
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199 return assertKind(kind, xpop()); |
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200 } |
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201 |
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202 /** |
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203 * Pops a value off of the stack without checking the type. |
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204 * @return x the instruction popped off the stack |
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205 */ |
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206 public Value xpop() { |
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207 return stack[--stackIndex]; |
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208 } |
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209 |
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210 /** |
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211 * Pops a value off of the stack and checks that it is an int. |
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212 * @return x the instruction popped off the stack |
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213 */ |
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214 public Value ipop() { |
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215 return assertInt(xpop()); |
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216 } |
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217 |
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218 /** |
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219 * Pops a value off of the stack and checks that it is a float. |
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220 * @return x the instruction popped off the stack |
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221 */ |
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222 public Value fpop() { |
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223 return assertFloat(xpop()); |
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224 } |
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225 |
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226 /** |
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227 * Pops a value off of the stack and checks that it is an object. |
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228 * @return x the instruction popped off the stack |
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229 */ |
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230 public Value apop() { |
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231 return assertObject(xpop()); |
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232 } |
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233 |
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234 /** |
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235 * Pops a value off of the stack and checks that it is a word. |
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236 * @return x the instruction popped off the stack |
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237 */ |
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238 public Value wpop() { |
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239 return assertWord(xpop()); |
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240 } |
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241 |
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242 /** |
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243 * Pops a value off of the stack and checks that it is a JSR return address. |
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244 * @return x the instruction popped off the stack |
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245 */ |
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246 public Value jpop() { |
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247 return assertJsr(xpop()); |
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248 } |
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249 |
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250 /** |
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251 * Pops a value off of the stack and checks that it is a long. |
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252 * @return x the instruction popped off the stack |
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253 */ |
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254 public Value lpop() { |
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255 assertHigh(xpop()); |
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256 return assertLong(xpop()); |
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257 } |
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258 |
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259 /** |
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260 * Pops a value off of the stack and checks that it is a double. |
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261 * @return x the instruction popped off the stack |
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262 */ |
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263 public Value dpop() { |
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264 assertHigh(xpop()); |
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265 return assertDouble(xpop()); |
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266 } |
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267 |
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268 /** |
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269 * Pop the specified number of slots off of this stack and return them as an array of instructions. |
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270 * @param size the number of arguments off of the stack |
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271 * @return an array containing the arguments off of the stack |
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272 */ |
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273 public Value[] popArguments(int size) { |
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274 int base = stackIndex - size; |
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275 Value[] r = new Value[size]; |
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276 for (int i = 0; i < size; ++i) { |
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277 assert stack[base + i] != null || stack[base + i - 1].kind.jvmSlots == 2; |
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278 r[i] = stack[base + i]; |
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279 } |
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280 stackIndex = base; |
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281 return r; |
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282 } |
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283 |
2616
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284 public CiKind peekKind() { |
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285 Value top = stackAt(stackSize() - 1); |
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286 if (top == null) { |
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287 top = stackAt(stackSize() - 2); |
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288 assert top != null; |
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289 assert top.kind.isDoubleWord(); |
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290 } |
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291 return top.kind; |
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292 } |
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293 |
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294 /** |
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295 * Truncates this stack to the specified size. |
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296 * @param size the size to truncate to |
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297 */ |
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298 public void truncateStack(int size) { |
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299 stackIndex = size; |
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300 assert stackIndex >= 0; |
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301 } |
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302 |
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303 /** |
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304 * Clears all values on this stack. |
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305 */ |
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306 public void clearStack() { |
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307 stackIndex = 0; |
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308 } |
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309 |
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310 /** |
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311 * Loads the local variable at the specified index. |
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312 * |
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313 * @param i the index of the local variable to load |
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314 * @return the instruction that produced the specified local |
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315 */ |
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316 public Value loadLocal(int i) { |
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317 Value x = locals[i]; |
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318 if (x != null) { |
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319 if (x.isIllegal()) { |
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320 return null; |
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321 } |
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322 assert x.kind.isSingleWord() || locals[i + 1] == null || locals[i + 1] instanceof Phi; |
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323 } |
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324 return x; |
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325 } |
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326 |
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327 /** |
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328 * Stores a given local variable at the specified index. If the value is a {@linkplain CiKind#isDoubleWord() double word}, |
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329 * then the next local variable index is also overwritten. |
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330 * |
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331 * @param i the index at which to store |
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332 * @param x the instruction which produces the value for the local |
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333 */ |
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334 public void storeLocal(int i, Value x) { |
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335 locals[i] = x; |
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336 if (isDoubleWord(x)) { |
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337 // (tw) if this was a double word then kill i+1 |
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338 locals[i + 1] = null; |
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339 } |
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340 if (i > 0) { |
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341 // if there was a double word at i - 1, then kill it |
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342 Value p = locals[i - 1]; |
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343 if (isDoubleWord(p)) { |
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344 locals[i - 1] = null; |
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345 } |
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346 } |
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347 } |
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348 |
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349 /** |
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350 * Locks a new object within the specified IRScope. |
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351 * @param scope the IRScope in which this locking operation occurs |
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352 * @param obj the object being locked |
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353 */ |
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354 public void lock(IR ir, Value obj, int totalNumberOfLocks) { |
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355 locks.add(obj); |
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356 ir.updateMaxLocks(totalNumberOfLocks); |
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357 } |
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358 |
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359 /** |
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360 * Unlock the lock on the top of the stack. |
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361 */ |
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362 public void unlock() { |
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363 locks.remove(locks.size() - 1); |
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364 } |
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365 |
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366 /** |
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367 * Get the value on the stack at the specified stack index. |
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368 * |
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369 * @param i the index into the stack, with {@code 0} being the bottom of the stack |
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370 * @return the instruction at the specified position in the stack |
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371 */ |
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372 public final Value stackAt(int i) { |
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373 return stack[i]; |
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374 } |
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375 |
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376 /** |
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377 * Gets the value in the local variables at the specified index. |
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378 * |
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379 * @param i the index into the locals |
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380 * @return the instruction that produced the value for the specified local |
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381 */ |
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382 public final Value localAt(int i) { |
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383 return locals[i]; |
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384 } |
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385 |
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386 /** |
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387 * Retrieves the lock at the specified index in the lock stack. |
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388 * @param i the index into the lock stack |
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389 * @return the instruction which produced the object at the specified location in the lock stack |
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390 */ |
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391 public final Value lockAt(int i) { |
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392 return locks.get(i); |
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393 } |
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394 |
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395 /** |
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396 * Returns the size of the local variables. |
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397 * |
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398 * @return the size of the local variables |
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399 */ |
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400 public int localsSize() { |
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401 return locals.length; |
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402 } |
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403 |
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404 /** |
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405 * Gets number of locks held by this frame state. |
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406 */ |
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407 public int locksSize() { |
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408 return locks.size(); |
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409 } |
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410 |
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411 /** |
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412 * Gets the current size (height) of the stack. |
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413 */ |
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414 public int stackSize() { |
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415 return stackIndex; |
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416 } |
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417 |
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418 public Iterator<Value> locals() { |
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419 return new ValueArrayIterator(locals); |
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420 } |
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421 |
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422 public Iterator<Value> stack() { |
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423 return new ValueArrayIterator(locals); |
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424 } |
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425 |
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426 public List<Value> locks() { |
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427 return Collections.unmodifiableList(locks); |
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428 } |
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429 |
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430 |
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431 private static class ValueArrayIterator implements Iterator<Value> { |
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432 private final Value[] array; |
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433 private int index; |
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434 private int length; |
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435 |
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436 public ValueArrayIterator(Value[] array, int length) { |
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437 assert length <= array.length; |
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438 this.array = array; |
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439 this.index = 0; |
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440 } |
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441 |
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442 public ValueArrayIterator(Value[] array) { |
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443 this(array, array.length); |
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444 } |
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445 |
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446 @Override |
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447 public boolean hasNext() { |
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448 return index < array.length; |
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449 } |
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450 |
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451 @Override |
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452 public Value next() { |
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453 return array[index++]; |
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454 } |
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455 |
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456 @Override |
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457 public void remove() { |
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458 throw new UnsupportedOperationException("cannot remove from array"); |
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459 } |
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460 |
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461 } |
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462 |
2616
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463 |
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464 @Override |
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465 public FrameState duplicate(int bci) { |
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466 return create(bci); |
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467 } |
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468 |
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469 @Override |
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470 public Value valueAt(int i) { |
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471 if (i < locals.length) { |
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472 return locals[i]; |
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473 } else if (i < locals.length + stackIndex) { |
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474 return stack[i - locals.length]; |
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475 } else { |
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476 return locks.get(i - locals.length - stack.length); |
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477 } |
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478 } |
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479 |
2611
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480 } |