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annotate graal/GraalCompiler/src/com/sun/c1x/value/FrameStateBuilder.java @ 2611:bd235cb4375a

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FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
author Lukas Stadler <lukas.stadler@jku.at>
date Fri, 06 May 2011 17:08:00 +0200
parents
children 3558ca7088c0
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2611
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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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parents:
diff changeset
122
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
123 /**
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
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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parents:
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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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Lukas Stadler <lukas.stadler@jku.at>
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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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Lukas Stadler <lukas.stadler@jku.at>
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155 /**
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diff changeset
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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diff changeset
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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parents:
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186 /**
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diff changeset
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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diff changeset
191 return stack[--stackIndex];
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192 }
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parents:
diff changeset
193
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
194 /**
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parents:
diff changeset
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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diff changeset
199 return assertInt(xpop());
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200 }
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parents:
diff changeset
201
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
202 /**
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parents:
diff changeset
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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diff changeset
207 return assertFloat(xpop());
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diff changeset
208 }
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
209
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
210 /**
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diff changeset
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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diff changeset
214 public Value apop() {
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diff changeset
215 return assertObject(xpop());
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diff changeset
216 }
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parents:
diff changeset
217
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
218 /**
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
219 * Pops a value off of the stack and checks that it is a word.
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diff changeset
220 * @return x the instruction popped off the stack
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parents:
diff changeset
221 */
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diff changeset
222 public Value wpop() {
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diff changeset
223 return assertWord(xpop());
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diff changeset
224 }
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
225
bd235cb4375a FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
226 /**
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
227 * Pops a value off of the stack and checks that it is a JSR return address.
bd235cb4375a FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
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228 * @return x the instruction popped off the stack
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229 */
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diff changeset
230 public Value jpop() {
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diff changeset
231 return assertJsr(xpop());
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parents:
diff changeset
232 }
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
233
bd235cb4375a FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
234 /**
bd235cb4375a FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
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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diff changeset
238 public Value lpop() {
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diff changeset
239 assertHigh(xpop());
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diff changeset
240 return assertLong(xpop());
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241 }
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242
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parents:
diff changeset
243 /**
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diff changeset
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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parents:
diff changeset
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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parents:
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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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diff changeset
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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diff changeset
307 */
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diff changeset
308 public void storeLocal(int i, Value x) {
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diff changeset
309 locals[i] = x;
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diff changeset
310 if (isDoubleWord(x)) {
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diff changeset
311 // (tw) if this was a double word then kill i+1
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diff changeset
312 locals[i + 1] = null;
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diff changeset
313 }
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diff changeset
314 if (i > 0) {
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diff changeset
315 // if there was a double word at i - 1, then kill it
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diff changeset
316 Value p = locals[i - 1];
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diff changeset
317 if (isDoubleWord(p)) {
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diff changeset
318 locals[i - 1] = null;
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diff changeset
319 }
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parents:
diff changeset
320 }
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Lukas Stadler <lukas.stadler@jku.at>
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diff changeset
321 }
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parents:
diff changeset
322
bd235cb4375a FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
323 /**
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parents:
diff changeset
324 * Locks a new object within the specified IRScope.
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diff changeset
325 * @param scope the IRScope in which this locking operation occurs
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diff changeset
326 * @param obj the object being locked
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diff changeset
327 */
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diff changeset
328 public void lock(IR ir, Value obj, int totalNumberOfLocks) {
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diff changeset
329 locks.add(obj);
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diff changeset
330 ir.updateMaxLocks(totalNumberOfLocks);
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diff changeset
331 }
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parents:
diff changeset
332
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
333 /**
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parents:
diff changeset
334 * Unlock the lock on the top of the stack.
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parents:
diff changeset
335 */
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parents:
diff changeset
336 public void unlock() {
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parents:
diff changeset
337 locks.remove(locks.size() - 1);
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parents:
diff changeset
338 }
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
339
bd235cb4375a FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
340 /**
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
341 * Get the value on the stack at the specified stack index.
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parents:
diff changeset
342 *
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parents:
diff changeset
343 * @param i the index into the stack, with {@code 0} being the bottom of the stack
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parents:
diff changeset
344 * @return the instruction at the specified position in the stack
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parents:
diff changeset
345 */
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parents:
diff changeset
346 public final Value stackAt(int i) {
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parents:
diff changeset
347 return stack[i];
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parents:
diff changeset
348 }
bd235cb4375a FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
349
bd235cb4375a FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
350 /**
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
351 * Gets the value in the local variables at the specified index.
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parents:
diff changeset
352 *
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Lukas Stadler <lukas.stadler@jku.at>
parents:
diff changeset
353 * @param i the index into the locals
bd235cb4375a FrameState cleanup: split into FrameStateBuilder and fixed-size FrameState, removed MutableFrameState
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parents:
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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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diff changeset
403
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parents:
diff changeset
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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diff changeset
420 @Override
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421 public boolean hasNext() {
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diff changeset
422 return index < array.length;
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423 }
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424
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diff changeset
425 @Override
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426 public Value next() {
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diff changeset
427 return array[index++];
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diff changeset
428 }
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parents:
diff changeset
429
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diff changeset
430 @Override
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431 public void remove() {
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diff changeset
432 throw new UnsupportedOperationException("cannot remove from array");
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parents:
diff changeset
433 }
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parents:
diff changeset
434
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parents:
diff changeset
435 }
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parents:
diff changeset
436
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diff changeset
437 }