Mercurial > hg > truffle
annotate graal/com.oracle.graal.lir/src/com/oracle/graal/lir/LIRInstruction.java @ 16800:a62a928287e4
Add LIRInstruction.visitEach{Input,Alive,Output,State}(InstructionValueConsumer).
author | Josef Eisl <josef.eisl@jku.at> |
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date | Tue, 12 Aug 2014 17:18:48 +0200 |
parents | 0d47af538a92 |
children | 730aa0eb20e5 |
rev | line source |
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1 /* |
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2 * Copyright (c) 2009, 2014, 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.oracle.graal.lir; |
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24 |
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25 import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*; |
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26 import static com.oracle.graal.lir.LIRInstruction.OperandMode.*; |
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27 |
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28 import java.lang.annotation.*; |
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29 import java.util.*; |
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30 |
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31 import com.oracle.graal.api.code.*; |
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32 import com.oracle.graal.api.meta.*; |
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33 import com.oracle.graal.debug.*; |
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34 import com.oracle.graal.lir.asm.*; |
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35 |
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36 /** |
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37 * The {@code LIRInstruction} class definition. |
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38 */ |
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39 public abstract class LIRInstruction { |
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40 |
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41 public static final Value[] NO_OPERANDS = {}; |
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42 |
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43 /** |
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44 * Constants denoting how a LIR instruction uses an operand. |
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45 */ |
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46 public enum OperandMode { |
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47 /** |
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48 * The value must have been defined before. It is alive before the instruction until the |
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49 * beginning of the instruction, but not necessarily throughout the instruction. A register |
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50 * assigned to it can also be assigned to a {@link #TEMP} or {@link #DEF} operand. The value |
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51 * can be used again after the instruction, so the instruction must not modify the register. |
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52 */ |
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53 USE, |
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54 |
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55 /** |
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56 * The value must have been defined before. It is alive before the instruction and |
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57 * throughout the instruction. A register assigned to it cannot be assigned to a |
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58 * {@link #TEMP} or {@link #DEF} operand. The value can be used again after the instruction, |
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59 * so the instruction must not modify the register. |
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60 */ |
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61 ALIVE, |
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62 |
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63 /** |
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64 * The value must not have been defined before, and must not be used after the instruction. |
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65 * The instruction can do whatever it wants with the register assigned to it (or not use it |
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66 * at all). |
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67 */ |
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68 TEMP, |
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69 |
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70 /** |
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71 * The value must not have been defined before. The instruction has to assign a value to the |
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72 * register. The value can (and most likely will) be used after the instruction. |
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73 */ |
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74 DEF, |
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75 } |
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76 |
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77 @Retention(RetentionPolicy.RUNTIME) |
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78 @Target(ElementType.FIELD) |
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79 public static @interface Use { |
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80 |
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81 OperandFlag[] value() default REG; |
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82 } |
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83 |
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84 @Retention(RetentionPolicy.RUNTIME) |
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85 @Target(ElementType.FIELD) |
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86 public static @interface Alive { |
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87 |
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88 OperandFlag[] value() default REG; |
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89 } |
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90 |
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91 @Retention(RetentionPolicy.RUNTIME) |
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92 @Target(ElementType.FIELD) |
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93 public static @interface Temp { |
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94 |
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95 OperandFlag[] value() default REG; |
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96 } |
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97 |
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98 @Retention(RetentionPolicy.RUNTIME) |
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99 @Target(ElementType.FIELD) |
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100 public static @interface Def { |
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101 |
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102 OperandFlag[] value() default REG; |
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103 } |
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104 |
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105 @Retention(RetentionPolicy.RUNTIME) |
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106 @Target(ElementType.FIELD) |
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107 public static @interface State { |
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108 } |
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109 |
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110 /** |
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111 * Flags for an operand. |
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112 */ |
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113 public enum OperandFlag { |
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114 /** |
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115 * The value can be a {@link RegisterValue}. |
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116 */ |
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117 REG, |
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118 |
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119 /** |
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120 * The value can be a {@link StackSlot}. |
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121 */ |
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122 STACK, |
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123 |
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124 /** |
8165 | 125 * The value can be a {@link CompositeValue}. |
126 */ | |
127 COMPOSITE, | |
128 | |
129 /** | |
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130 * The value can be a {@link Constant}. |
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131 */ |
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132 CONST, |
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133 |
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134 /** |
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135 * The value can be {@link Value#ILLEGAL}. |
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136 */ |
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137 ILLEGAL, |
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138 |
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139 /** |
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140 * The register allocator should try to assign a certain register to improve code quality. |
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141 * Use {@link LIRInstruction#forEachRegisterHint} to access the register hints. |
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142 */ |
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143 HINT, |
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144 |
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145 /** |
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146 * The value can be uninitialized, e.g., a stack slot that has not written to before. This |
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147 * is only used to avoid false positives in verification code. |
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148 */ |
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149 UNINITIALIZED, |
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150 } |
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151 |
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152 /** |
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153 * For validity checking of the operand flags defined by instruction subclasses. |
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154 */ |
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155 protected static final EnumMap<OperandMode, EnumSet<OperandFlag>> ALLOWED_FLAGS; |
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156 |
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157 static { |
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158 ALLOWED_FLAGS = new EnumMap<>(OperandMode.class); |
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159 ALLOWED_FLAGS.put(USE, EnumSet.of(REG, STACK, COMPOSITE, CONST, ILLEGAL, HINT, UNINITIALIZED)); |
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160 ALLOWED_FLAGS.put(ALIVE, EnumSet.of(REG, STACK, COMPOSITE, CONST, ILLEGAL, HINT, UNINITIALIZED)); |
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161 ALLOWED_FLAGS.put(TEMP, EnumSet.of(REG, COMPOSITE, CONST, ILLEGAL, HINT)); |
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162 ALLOWED_FLAGS.put(DEF, EnumSet.of(REG, STACK, COMPOSITE, ILLEGAL, HINT)); |
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163 } |
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164 |
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165 /** |
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166 * The flags of the base and index value of an address. |
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167 */ |
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168 protected static final EnumSet<OperandFlag> ADDRESS_FLAGS = EnumSet.of(REG, ILLEGAL); |
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169 |
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170 private final LIRInstructionClass instructionClass; |
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171 |
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172 /** |
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173 * Instruction id for register allocation. |
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174 */ |
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175 private int id; |
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176 |
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177 private static final DebugMetric LIR_NODE_COUNT = Debug.metric("LIRNodes"); |
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178 |
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179 /** |
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180 * Constructs a new LIR instruction. |
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181 */ |
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182 public LIRInstruction() { |
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183 LIR_NODE_COUNT.increment(); |
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184 instructionClass = LIRInstructionClass.get(getClass()); |
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185 id = -1; |
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186 } |
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187 |
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188 public abstract void emitCode(CompilationResultBuilder crb); |
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189 |
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190 public final int id() { |
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191 return id; |
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192 } |
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193 |
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194 public final void setId(int id) { |
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195 this.id = id; |
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196 } |
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197 |
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198 /** |
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199 * Gets the instruction name. |
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200 */ |
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201 public final String name() { |
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202 return instructionClass.getOpcode(this); |
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203 } |
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204 |
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205 public final boolean hasOperands() { |
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206 return instructionClass.hasOperands() || hasState() || destroysCallerSavedRegisters(); |
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207 } |
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208 |
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209 public final boolean hasState() { |
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210 return instructionClass.hasState(this); |
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211 } |
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212 |
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213 /** |
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214 * Determines if this instruction destroys all caller-saved registers.. |
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215 */ |
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216 public boolean destroysCallerSavedRegisters() { |
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217 return false; |
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218 } |
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219 |
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220 // ValuePositionProcedures |
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221 public final void forEachInput(ValuePositionProcedure proc) { |
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222 instructionClass.forEachUse(this, proc); |
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223 } |
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224 |
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225 public final void forEachAlive(ValuePositionProcedure proc) { |
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226 instructionClass.forEachAlive(this, proc); |
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227 } |
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228 |
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229 public final void forEachTemp(ValuePositionProcedure proc) { |
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230 instructionClass.forEachTemp(this, proc); |
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231 } |
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232 |
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233 public final void forEachOutput(ValuePositionProcedure proc) { |
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234 instructionClass.forEachDef(this, proc); |
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235 } |
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236 |
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237 // InstructionValueProcedures |
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238 public final void forEachInput(InstructionValueProcedure proc) { |
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239 instructionClass.forEachUse(this, proc); |
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240 } |
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241 |
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242 public final void forEachAlive(InstructionValueProcedure proc) { |
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243 instructionClass.forEachAlive(this, proc); |
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244 } |
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245 |
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246 public final void forEachTemp(InstructionValueProcedure proc) { |
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247 instructionClass.forEachTemp(this, proc); |
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248 } |
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249 |
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250 public final void forEachOutput(InstructionValueProcedure proc) { |
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251 instructionClass.forEachDef(this, proc); |
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252 } |
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253 |
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254 // States |
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255 public final void forEachState(InstructionValueProcedure proc) { |
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256 instructionClass.forEachState(this, proc); |
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257 } |
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258 |
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259 public final void forEachState(InstructionStateProcedure proc) { |
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260 instructionClass.forEachState(this, proc); |
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261 } |
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262 |
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263 // Consumers |
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264 public final void visitEachInput(InstructionValueConsumer proc) { |
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265 instructionClass.forEachUse(this, proc); |
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266 } |
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267 |
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268 public final void visitEachAlive(InstructionValueConsumer proc) { |
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269 instructionClass.forEachAlive(this, proc); |
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270 } |
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271 |
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272 public final void visitEachTemp(InstructionValueConsumer proc) { |
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273 instructionClass.forEachTemp(this, proc); |
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274 } |
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275 |
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276 public final void visitEachOutput(InstructionValueConsumer proc) { |
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277 instructionClass.forEachDef(this, proc); |
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278 } |
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279 |
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280 public final void visitEachState(InstructionValueConsumer proc) { |
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281 instructionClass.forEachState(this, proc); |
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282 } |
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283 |
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284 /** |
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285 * Iterates all register hints for the specified value, i.e., all preferred candidates for the |
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286 * register to be assigned to the value. |
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287 * <p> |
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288 * Subclasses can override this method. The default implementation processes all Input operands |
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289 * as the hints for an Output operand, and all Output operands as the hints for an Input |
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290 * operand. |
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291 * |
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292 * @param value The value the hints are needed for. |
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293 * @param mode The operand mode of the value. |
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294 * @param proc The procedure invoked for all the hints. If the procedure returns a non-null |
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295 * value, the iteration is stopped and the value is returned by this method, i.e., |
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296 * clients can stop the iteration once a suitable hint has been found. |
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297 * @return The non-null value returned by the procedure, or null. |
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298 */ |
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299 public Value forEachRegisterHint(Value value, OperandMode mode, InstructionValueProcedure proc) { |
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300 return instructionClass.forEachRegisterHint(this, mode, proc); |
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301 } |
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302 |
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303 protected void verify() { |
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304 } |
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305 |
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306 public final String toStringWithIdPrefix() { |
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307 if (id != -1) { |
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308 return String.format("%4d %s", id, toString()); |
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309 } |
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310 return " " + toString(); |
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311 } |
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312 |
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313 @Override |
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314 public String toString() { |
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315 return instructionClass.toString(this); |
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316 } |
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317 |
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318 public LIRInstructionClass getLIRInstructionClass() { |
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319 return instructionClass; |
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320 } |
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321 } |