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annotate graal/GraalCompiler/src/com/sun/c1x/value/FrameStateBuilder.java @ 2611:bd235cb4375a
FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Fri, 06 May 2011 17:08:00 +0200 |
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children | 3558ca7088c0 |
rev | line source |
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2611
bd235cb4375a
FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
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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 java.util.*; |
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26 |
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27 import com.oracle.graal.graph.*; |
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28 import com.sun.c1x.graph.*; |
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29 import com.sun.c1x.ir.*; |
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30 import com.sun.cri.ci.*; |
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31 import com.sun.cri.ri.*; |
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32 |
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33 import static com.sun.c1x.value.ValueUtil.*; |
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34 import static java.lang.reflect.Modifier.*; |
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35 |
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36 |
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37 public class FrameStateBuilder { |
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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 System.arraycopy(other.values, 0, locals, 0, locals.length); |
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83 System.arraycopy(other.values, other.localsSize(), stack, 0, stackIndex); |
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84 locks.clear(); |
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85 for (int i = 0; i < other.locksSize(); i++) { |
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86 locks.add(other.lockAt(i)); |
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87 } |
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88 } |
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89 |
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90 public FrameState create(int bci) { |
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91 return new FrameState(bci, locals, stack, stackIndex, locks); |
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92 } |
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93 |
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94 /** |
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95 * Pushes an instruction onto the stack with the expected type. |
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96 * @param kind the type expected for this instruction |
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97 * @param x the instruction to push onto the stack |
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98 */ |
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99 public void push(CiKind kind, Value x) { |
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100 assert kind != CiKind.Void; |
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101 xpush(assertKind(kind, x)); |
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102 if (kind.sizeInSlots() == 2) { |
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103 xpush(null); |
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104 } |
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105 } |
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106 |
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107 /** |
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108 * Pushes a value onto the stack without checking the type. |
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109 * @param x the instruction to push onto the stack |
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110 */ |
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111 public void xpush(Value x) { |
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112 stack[stackIndex++] = x; |
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113 } |
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114 |
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115 /** |
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116 * Pushes a value onto the stack and checks that it is an int. |
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117 * @param x the instruction to push onto the stack |
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118 */ |
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119 public void ipush(Value x) { |
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120 xpush(assertInt(x)); |
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121 } |
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122 |
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123 /** |
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124 * Pushes a value onto the stack and checks that it is a float. |
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125 * @param x the instruction to push onto the stack |
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126 */ |
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127 public void fpush(Value x) { |
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128 xpush(assertFloat(x)); |
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129 } |
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130 |
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131 /** |
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132 * Pushes a value onto the stack and checks that it is an object. |
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133 * @param x the instruction to push onto the stack |
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134 */ |
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135 public void apush(Value x) { |
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136 xpush(assertObject(x)); |
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137 } |
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138 |
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139 /** |
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140 * Pushes a value onto the stack and checks that it is a word. |
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141 * @param x the instruction to push onto the stack |
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142 */ |
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143 public void wpush(Value x) { |
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144 xpush(assertWord(x)); |
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145 } |
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146 |
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147 /** |
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148 * Pushes a value onto the stack and checks that it is a JSR return address. |
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149 * @param x the instruction to push onto the stack |
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150 */ |
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151 public void jpush(Value x) { |
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152 xpush(assertJsr(x)); |
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153 } |
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154 |
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155 /** |
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156 * Pushes a value onto the stack and checks that it is a long. |
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157 * |
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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 lpush(Value x) { |
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161 xpush(assertLong(x)); |
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162 xpush(null); |
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163 } |
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164 |
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165 /** |
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166 * Pushes a value onto the stack and checks that it is a double. |
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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 dpush(Value x) { |
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170 xpush(assertDouble(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 * Pops an instruction off the stack with the expected type. |
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176 * @param kind the expected type |
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177 * @return the instruction on the top of the stack |
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178 */ |
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179 public Value pop(CiKind kind) { |
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180 if (kind.sizeInSlots() == 2) { |
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181 xpop(); |
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182 } |
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183 return assertKind(kind, xpop()); |
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184 } |
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185 |
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186 /** |
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187 * Pops a value off of the stack without checking the type. |
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188 * @return x the instruction popped off the stack |
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189 */ |
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190 public Value xpop() { |
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191 return stack[--stackIndex]; |
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192 } |
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193 |
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194 /** |
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195 * Pops a value off of the stack and checks that it is an int. |
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196 * @return x the instruction popped off the stack |
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197 */ |
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198 public Value ipop() { |
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199 return assertInt(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 and checks that it is a float. |
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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 fpop() { |
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207 return assertFloat(xpop()); |
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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 object. |
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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 apop() { |
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215 return assertObject(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 word. |
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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 wpop() { |
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223 return assertWord(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 a JSR return address. |
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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 jpop() { |
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231 return assertJsr(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 long. |
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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 lpop() { |
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239 assertHigh(xpop()); |
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240 return assertLong(xpop()); |
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241 } |
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242 |
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243 /** |
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244 * Pops a value off of the stack and checks that it is a double. |
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245 * @return x the instruction popped off the stack |
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246 */ |
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247 public Value dpop() { |
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248 assertHigh(xpop()); |
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249 return assertDouble(xpop()); |
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250 } |
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251 |
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252 /** |
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253 * Pop the specified number of slots off of this stack and return them as an array of instructions. |
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254 * @param size the number of arguments off of the stack |
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255 * @return an array containing the arguments off of the stack |
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256 */ |
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257 public Value[] popArguments(int size) { |
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258 int base = stackIndex - size; |
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259 Value[] r = new Value[size]; |
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260 for (int i = 0; i < size; ++i) { |
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261 assert stack[base + i] != null || stack[base + i - 1].kind.jvmSlots == 2; |
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262 r[i] = stack[base + i]; |
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263 } |
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264 stackIndex = base; |
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265 return r; |
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266 } |
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267 |
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268 /** |
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269 * Truncates this stack to the specified size. |
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270 * @param size the size to truncate to |
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271 */ |
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272 public void truncateStack(int size) { |
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273 stackIndex = size; |
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274 assert stackIndex >= 0; |
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275 } |
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276 |
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277 /** |
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278 * Clears all values on this stack. |
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279 */ |
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280 public void clearStack() { |
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281 stackIndex = 0; |
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282 } |
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283 |
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284 /** |
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285 * Loads the local variable at the specified index. |
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286 * |
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287 * @param i the index of the local variable to load |
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288 * @return the instruction that produced the specified local |
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289 */ |
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290 public Value loadLocal(int i) { |
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291 Value x = locals[i]; |
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292 if (x != null) { |
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293 if (x.isIllegal()) { |
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294 return null; |
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295 } |
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296 assert x.kind.isSingleWord() || locals[i + 1] == null || locals[i + 1] instanceof Phi; |
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297 } |
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298 return x; |
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299 } |
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300 |
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301 /** |
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302 * Stores a given local variable at the specified index. If the value is a {@linkplain CiKind#isDoubleWord() double word}, |
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303 * then the next local variable index is also overwritten. |
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304 * |
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305 * @param i the index at which to store |
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306 * @param x the instruction which produces the value for the local |
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307 */ |
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308 public void storeLocal(int i, Value x) { |
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309 locals[i] = x; |
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310 if (isDoubleWord(x)) { |
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311 // (tw) if this was a double word then kill i+1 |
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312 locals[i + 1] = null; |
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313 } |
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314 if (i > 0) { |
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315 // if there was a double word at i - 1, then kill it |
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316 Value p = locals[i - 1]; |
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317 if (isDoubleWord(p)) { |
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318 locals[i - 1] = null; |
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319 } |
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320 } |
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321 } |
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322 |
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323 /** |
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324 * Locks a new object within the specified IRScope. |
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325 * @param scope the IRScope in which this locking operation occurs |
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326 * @param obj the object being locked |
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327 */ |
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328 public void lock(IR ir, Value obj, int totalNumberOfLocks) { |
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329 locks.add(obj); |
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330 ir.updateMaxLocks(totalNumberOfLocks); |
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331 } |
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332 |
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333 /** |
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334 * Unlock the lock on the top of the stack. |
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335 */ |
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336 public void unlock() { |
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337 locks.remove(locks.size() - 1); |
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338 } |
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339 |
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340 /** |
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341 * Get the value on the stack at the specified stack index. |
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342 * |
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343 * @param i the index into the stack, with {@code 0} being the bottom of the stack |
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344 * @return the instruction at the specified position in the stack |
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345 */ |
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346 public final Value stackAt(int i) { |
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347 return stack[i]; |
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348 } |
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349 |
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350 /** |
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351 * Gets the value in the local variables at the specified index. |
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352 * |
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353 * @param i the index into the locals |
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354 * @return the instruction that produced the value for the specified local |
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355 */ |
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356 public final Value localAt(int i) { |
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357 return locals[i]; |
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358 } |
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359 |
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360 /** |
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361 * Retrieves the lock at the specified index in the lock stack. |
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362 * @param i the index into the lock stack |
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363 * @return the instruction which produced the object at the specified location in the lock stack |
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364 */ |
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365 public final Value lockAt(int i) { |
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366 return locks.get(i); |
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367 } |
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368 |
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369 /** |
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370 * Returns the size of the local variables. |
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371 * |
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372 * @return the size of the local variables |
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373 */ |
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374 public int localsSize() { |
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375 return locals.length; |
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376 } |
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377 |
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378 /** |
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379 * Gets number of locks held by this frame state. |
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380 */ |
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381 public int locksSize() { |
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382 return locks.size(); |
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383 } |
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384 |
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385 /** |
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386 * Gets the current size (height) of the stack. |
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387 */ |
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388 public int stackSize() { |
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389 return stackIndex; |
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390 } |
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391 |
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392 public Iterator<Value> locals() { |
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393 return new ValueArrayIterator(locals); |
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394 } |
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395 |
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396 public Iterator<Value> stack() { |
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397 return new ValueArrayIterator(locals); |
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398 } |
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399 |
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400 public List<Value> locks() { |
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401 return Collections.unmodifiableList(locks); |
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402 } |
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403 |
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404 |
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405 private static class ValueArrayIterator implements Iterator<Value> { |
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406 private final Value[] array; |
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407 private int index; |
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408 private int length; |
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409 |
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410 public ValueArrayIterator(Value[] array, int length) { |
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411 assert length <= array.length; |
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412 this.array = array; |
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413 this.index = 0; |
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414 } |
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415 |
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416 public ValueArrayIterator(Value[] array) { |
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417 this(array, array.length); |
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418 } |
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419 |
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420 @Override |
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421 public boolean hasNext() { |
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422 return index < array.length; |
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423 } |
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424 |
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425 @Override |
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426 public Value next() { |
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427 return array[index++]; |
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FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
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428 } |
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FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
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429 |
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FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
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430 @Override |
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FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
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431 public void remove() { |
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FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
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432 throw new UnsupportedOperationException("cannot remove from array"); |
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FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
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433 } |
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FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
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434 |
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FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
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435 } |
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FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
parents:
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436 |
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FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
parents:
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437 } |