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annotate graal/com.oracle.graal.lir/src/com/oracle/graal/lir/LIRInstruction.java @ 20978:5541e9c74d38

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author Tom Rodriguez <tom.rodriguez@oracle.com>
date Tue, 14 Apr 2015 11:37:12 -0700
parents a69a7c0e0ccc
children 93c50cefb9e8
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1 /*
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2 * Copyright (c) 2009, 2015, 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 java.lang.annotation.*;
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26 import java.util.*;
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27
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28 import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*;
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29 import static com.oracle.graal.lir.LIRInstruction.OperandMode.*;
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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 base class for an {@code LIRInstruction}.
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38 */
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39 public abstract class LIRInstruction {
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40 /**
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41 * Constants denoting how a LIR instruction uses an operand.
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42 */
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43 public enum OperandMode {
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44 /**
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45 * The value must have been defined before. It is alive before the instruction until the
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46 * beginning of the instruction, but not necessarily throughout the instruction. A register
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47 * assigned to it can also be assigned to a {@link #TEMP} or {@link #DEF} operand. The value
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48 * can be used again after the instruction, so the instruction must not modify the register.
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49 */
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50 USE,
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51
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52 /**
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53 * The value must have been defined before. It is alive before the instruction and
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54 * throughout the instruction. A register assigned to it cannot be assigned to a
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55 * {@link #TEMP} or {@link #DEF} operand. The value can be used again after the instruction,
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56 * so the instruction must not modify the register.
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57 */
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58 ALIVE,
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59
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60 /**
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61 * The value must not have been defined before, and must not be used after the instruction.
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62 * The instruction can do whatever it wants with the register assigned to it (or not use it
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63 * at all).
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64 */
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65 TEMP,
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67 /**
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68 * The value must not have been defined before. The instruction has to assign a value to the
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69 * register. The value can (and most likely will) be used after the instruction.
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70 */
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71 DEF,
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72 }
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73
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74 @Retention(RetentionPolicy.RUNTIME)
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75 @Target(ElementType.FIELD)
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76 public static @interface Use {
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77
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78 OperandFlag[] value() default OperandFlag.REG;
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79 }
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80
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81 @Retention(RetentionPolicy.RUNTIME)
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82 @Target(ElementType.FIELD)
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83 public static @interface Alive {
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84
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85 OperandFlag[] value() default OperandFlag.REG;
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86 }
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87
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88 @Retention(RetentionPolicy.RUNTIME)
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89 @Target(ElementType.FIELD)
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90 public static @interface Temp {
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91
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92 OperandFlag[] value() default OperandFlag.REG;
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93 }
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94
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95 @Retention(RetentionPolicy.RUNTIME)
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96 @Target(ElementType.FIELD)
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97 public static @interface Def {
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98
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99 OperandFlag[] value() default OperandFlag.REG;
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100 }
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101
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102 @Retention(RetentionPolicy.RUNTIME)
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103 @Target(ElementType.FIELD)
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104 public static @interface State {
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105 }
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106
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107 /**
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108 * Flags for an operand.
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109 */
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110 public enum OperandFlag {
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111 /**
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112 * The value can be a {@link RegisterValue}.
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113 */
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114 REG,
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115
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116 /**
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117 * The value can be a {@link StackSlot}.
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118 */
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119 STACK,
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120
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121 /**
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122 * The value can be a {@link CompositeValue}.
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123 */
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124 COMPOSITE,
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125
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126 /**
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127 * The value can be a {@link JavaConstant}.
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128 */
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129 CONST,
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130
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131 /**
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132 * The value can be {@link Value#ILLEGAL}.
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133 */
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134 ILLEGAL,
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135
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136 /**
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137 * The register allocator should try to assign a certain register to improve code quality.
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138 * Use {@link LIRInstruction#forEachRegisterHint} to access the register hints.
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139 */
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140 HINT,
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141
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142 /**
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143 * The value can be uninitialized, e.g., a stack slot that has not written to before. This
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144 * is only used to avoid false positives in verification code.
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145 */
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146 UNINITIALIZED,
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147 }
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148
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149 /**
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150 * For validity checking of the operand flags defined by instruction subclasses.
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151 */
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152 protected static final EnumMap<OperandMode, EnumSet<OperandFlag>> ALLOWED_FLAGS;
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153
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154 static {
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155 ALLOWED_FLAGS = new EnumMap<>(OperandMode.class);
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156 ALLOWED_FLAGS.put(OperandMode.USE, EnumSet.of(REG, STACK, COMPOSITE, CONST, ILLEGAL, HINT, UNINITIALIZED));
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157 ALLOWED_FLAGS.put(ALIVE, EnumSet.of(REG, STACK, COMPOSITE, CONST, ILLEGAL, HINT, UNINITIALIZED));
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158 ALLOWED_FLAGS.put(TEMP, EnumSet.of(REG, COMPOSITE, CONST, ILLEGAL, HINT));
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159 ALLOWED_FLAGS.put(DEF, EnumSet.of(REG, STACK, COMPOSITE, ILLEGAL, HINT));
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160 }
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161
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162 /**
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163 * The flags of the base and index value of an address.
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164 */
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165 protected static final EnumSet<OperandFlag> ADDRESS_FLAGS = EnumSet.of(REG, ILLEGAL);
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166
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167 private final LIRInstructionClass<?> instructionClass;
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168
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169 /**
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170 * Instruction id for register allocation.
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171 */
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172 private int id;
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173
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174 private static final DebugMetric LIR_NODE_COUNT = Debug.metric("LIRNodes");
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175
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176 /**
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177 * Constructs a new LIR instruction.
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178 */
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179 public LIRInstruction(LIRInstructionClass<? extends LIRInstruction> c) {
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180 LIR_NODE_COUNT.increment();
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181 instructionClass = c;
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182 assert c.getClazz() == this.getClass();
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183 id = -1;
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184 }
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185
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186 public abstract void emitCode(CompilationResultBuilder crb);
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187
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188 public final int id() {
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189 return id;
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190 }
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191
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192 public final void setId(int id) {
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193 this.id = id;
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194 }
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195
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196 public final String name() {
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197 return instructionClass.getOpcode(this);
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198 }
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199
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200 public final boolean hasOperands() {
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201 return instructionClass.hasOperands() || hasState() || destroysCallerSavedRegisters();
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202 }
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203
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204 public final boolean hasState() {
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205 return instructionClass.hasState(this);
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206 }
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207
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208 public boolean destroysCallerSavedRegisters() {
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209 return false;
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210 }
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211
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212 // InstructionValueProcedures
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213 public final void forEachInput(InstructionValueProcedure proc) {
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214 instructionClass.forEachUse(this, proc);
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215 }
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216
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217 public final void forEachAlive(InstructionValueProcedure proc) {
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218 instructionClass.forEachAlive(this, proc);
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219 }
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220
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221 public final void forEachTemp(InstructionValueProcedure proc) {
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222 instructionClass.forEachTemp(this, proc);
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223 }
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224
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225 public final void forEachOutput(InstructionValueProcedure proc) {
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226 instructionClass.forEachDef(this, proc);
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227 }
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228
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229 public final void forEachState(InstructionValueProcedure proc) {
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230 instructionClass.forEachState(this, proc);
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231 }
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232
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233 // ValueProcedures
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234 public final void forEachInput(ValueProcedure proc) {
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235 instructionClass.forEachUse(this, proc);
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236 }
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237
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238 public final void forEachAlive(ValueProcedure proc) {
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239 instructionClass.forEachAlive(this, proc);
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240 }
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241
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242 public final void forEachTemp(ValueProcedure proc) {
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243 instructionClass.forEachTemp(this, proc);
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244 }
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245
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246 public final void forEachOutput(ValueProcedure proc) {
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247 instructionClass.forEachDef(this, proc);
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248 }
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249
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250 public final void forEachState(ValueProcedure proc) {
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251 instructionClass.forEachState(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(InstructionStateProcedure 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(StateProcedure 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 // InstructionValueConsumers
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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 // ValueConsumers
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285 public final void visitEachInput(ValueConsumer proc) {
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286 instructionClass.forEachUse(this, proc);
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287 }
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288
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289 public final void visitEachAlive(ValueConsumer proc) {
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290 instructionClass.forEachAlive(this, proc);
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291 }
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292
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293 public final void visitEachTemp(ValueConsumer proc) {
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294 instructionClass.forEachTemp(this, proc);
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295 }
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296
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297 public final void visitEachOutput(ValueConsumer proc) {
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298 instructionClass.forEachDef(this, proc);
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299 }
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300
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301 public final void visitEachState(ValueConsumer proc) {
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302 instructionClass.forEachState(this, proc);
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303 }
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304
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305 @SuppressWarnings("unused")
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306 public final Value forEachRegisterHint(Value value, OperandMode mode, InstructionValueProcedure proc) {
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307 return instructionClass.forEachRegisterHint(this, mode, proc);
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308 }
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309
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310 @SuppressWarnings("unused")
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311 public final Value forEachRegisterHint(Value value, OperandMode mode, ValueProcedure proc) {
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312 return instructionClass.forEachRegisterHint(this, mode, proc);
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313 }
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314
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315 public void verify() {
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316 }
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317
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318 public final String toStringWithIdPrefix() {
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319 if (id != -1) {
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320 return String.format("%4d %s", id, toString());
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321 }
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322 return " " + toString();
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323 }
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324
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325 @Override
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326 public String toString() {
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327 return instructionClass.toString(this);
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328 }
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329
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330 public LIRInstructionClass<?> getLIRInstructionClass() {
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331 return instructionClass;
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332 }
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333 }