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annotate graal/com.oracle.graal.lir/src/com/oracle/graal/lir/LIRInstruction.java @ 16354:b6e70c59b32d

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Introduce InstructionStateProcedure.
author Josef Eisl <josef.eisl@jku.at>
date Wed, 02 Jul 2014 15:26:28 +0200
parents d59e68286d60
children 0d47af538a92
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1 /*
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2 * Copyright (c) 2009, 2012, 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.compiler.common.*;
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34 import com.oracle.graal.debug.*;
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35 import com.oracle.graal.lir.asm.*;
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36
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37 /**
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38 * The {@code LIRInstruction} class definition.
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39 */
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40 public abstract class LIRInstruction {
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41
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42 public static final Value[] NO_OPERANDS = {};
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43
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44 /**
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45 * Iterator for iterating over a list of {@linkplain ValuePosition value positions}.
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46 */
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47 public abstract static class ValuePositionProcedure {
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48
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49 /**
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50 * Iterator method to be overwritten. This version of the iterator does not take additional
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51 * parameters to keep the signature short.
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52 *
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53 * @param instruction The current instruction.
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54 * @param position The position of the value that is iterated.
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55 */
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56
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57 public abstract void doValue(LIRInstruction instruction, ValuePosition position);
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58 }
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59
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60 /**
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61 * Iterator for iterating over a list of values. Subclasses must overwrite one of the doValue
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62 * methods. Clients of the class must only call the doValue method that takes additional
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63 * parameters.
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64 */
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65 public abstract static class InstructionValueProcedure {
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66
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67 /**
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68 * Iterator method to be overwritten. This version of the iterator does not take additional
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69 * parameters to keep the signature short.
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70 *
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71 * @param instruction The current instruction.
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72 * @param value The value that is iterated.
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73 * @return The new value to replace the value that was passed in.
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74 */
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75 protected Value doValue(LIRInstruction instruction, Value value) {
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76 throw GraalInternalError.shouldNotReachHere("One of the doValue() methods must be overwritten");
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77 }
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78
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79 /**
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80 * Iterator method to be overwritten. This version of the iterator gets additional
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81 * parameters about the processed value.
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82 *
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83 * @param instruction The current instruction.
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84 * @param value The value that is iterated.
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85 * @param mode The operand mode for the value.
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86 * @param flags A set of flags for the value.
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87 * @return The new value to replace the value that was passed in.
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88 */
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89 public Value doValue(LIRInstruction instruction, Value value, OperandMode mode, EnumSet<OperandFlag> flags) {
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90 return doValue(instruction, value);
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91 }
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92 }
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93
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94 /**
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95 * Similar to {@link InstructionValueProcedure} but without an {@link LIRInstruction} parameter.
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96 */
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97 public abstract static class ValueProcedure extends InstructionValueProcedure {
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98
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99 /**
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100 * Iterator method to be overwritten. This version of the iterator does not take additional
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101 * parameters to keep the signature short.
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102 *
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103 * @param value The value that is iterated.
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104 * @return The new value to replace the value that was passed in.
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105 */
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106 protected Value doValue(Value value) {
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107 throw GraalInternalError.shouldNotReachHere("One of the doValue() methods must be overwritten");
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108 }
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109
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110 /**
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111 * Iterator method to be overwritten. This version of the iterator gets additional
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112 * parameters about the processed value.
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113 *
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114 * @param value The value that is iterated.
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115 * @param mode The operand mode for the value.
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116 * @param flags A set of flags for the value.
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117 * @return The new value to replace the value that was passed in.
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118 */
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119 protected Value doValue(Value value, OperandMode mode, EnumSet<OperandFlag> flags) {
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120 return doValue(value);
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121 }
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122
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123 @Override
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124 protected final Value doValue(LIRInstruction instruction, Value value) {
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125 throw GraalInternalError.shouldNotReachHere("This doValue() methods should never be called");
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126 }
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127
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128 @Override
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129 public final Value doValue(LIRInstruction instruction, Value value, OperandMode mode, EnumSet<OperandFlag> flags) {
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130 return doValue(value, mode, flags);
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131 }
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132 }
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133
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134 public abstract static class InstructionStateProcedure {
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135
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136 protected abstract void doState(LIRInstruction instruction, LIRFrameState state);
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137 }
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138
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139 public abstract static class StateProcedure extends InstructionStateProcedure {
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140
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141 protected abstract void doState(LIRFrameState state);
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142
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143 @Override
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144 protected final void doState(LIRInstruction instruction, LIRFrameState state) {
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145 doState(state);
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146 }
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147 }
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148
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149 /**
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150 * Constants denoting how a LIR instruction uses an operand.
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151 */
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152 public enum OperandMode {
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153 /**
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154 * The value must have been defined before. It is alive before the instruction until the
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155 * beginning of the instruction, but not necessarily throughout the instruction. A register
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156 * assigned to it can also be assigned to a {@link #TEMP} or {@link #DEF} operand. The value
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157 * can be used again after the instruction, so the instruction must not modify the register.
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158 */
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159 USE,
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160
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161 /**
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162 * The value must have been defined before. It is alive before the instruction and
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163 * throughout the instruction. A register assigned to it cannot be assigned to a
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164 * {@link #TEMP} or {@link #DEF} operand. The value can be used again after the instruction,
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165 * so the instruction must not modify the register.
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166 */
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167 ALIVE,
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168
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169 /**
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170 * The value must not have been defined before, and must not be used after the instruction.
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171 * The instruction can do whatever it wants with the register assigned to it (or not use it
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172 * at all).
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173 */
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174 TEMP,
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175
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176 /**
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177 * The value must not have been defined before. The instruction has to assign a value to the
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178 * register. The value can (and most likely will) be used after the instruction.
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179 */
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180 DEF,
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181 }
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182
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183 @Retention(RetentionPolicy.RUNTIME)
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184 @Target(ElementType.FIELD)
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185 public static @interface Use {
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186
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187 OperandFlag[] value() default REG;
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188 }
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189
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190 @Retention(RetentionPolicy.RUNTIME)
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191 @Target(ElementType.FIELD)
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192 public static @interface Alive {
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193
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194 OperandFlag[] value() default REG;
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195 }
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196
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197 @Retention(RetentionPolicy.RUNTIME)
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198 @Target(ElementType.FIELD)
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199 public static @interface Temp {
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200
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201 OperandFlag[] value() default REG;
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202 }
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203
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204 @Retention(RetentionPolicy.RUNTIME)
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205 @Target(ElementType.FIELD)
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206 public static @interface Def {
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207
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208 OperandFlag[] value() default REG;
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209 }
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210
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211 @Retention(RetentionPolicy.RUNTIME)
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212 @Target(ElementType.FIELD)
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213 public static @interface State {
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214 }
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215
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216 /**
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217 * Flags for an operand.
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218 */
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219 public enum OperandFlag {
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220 /**
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221 * The value can be a {@link RegisterValue}.
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222 */
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223 REG,
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224
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225 /**
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226 * The value can be a {@link StackSlot}.
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227 */
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228 STACK,
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229
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230 /**
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231 * The value can be a {@link CompositeValue}.
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232 */
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233 COMPOSITE,
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234
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235 /**
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236 * The value can be a {@link Constant}.
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237 */
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238 CONST,
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239
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240 /**
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241 * The value can be {@link Value#ILLEGAL}.
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242 */
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243 ILLEGAL,
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244
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245 /**
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246 * The register allocator should try to assign a certain register to improve code quality.
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247 * Use {@link LIRInstruction#forEachRegisterHint} to access the register hints.
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248 */
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249 HINT,
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250
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251 /**
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252 * The value can be uninitialized, e.g., a stack slot that has not written to before. This
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253 * is only used to avoid false positives in verification code.
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254 */
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255 UNINITIALIZED,
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256 }
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257
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258 /**
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259 * For validity checking of the operand flags defined by instruction subclasses.
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260 */
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261 protected static final EnumMap<OperandMode, EnumSet<OperandFlag>> ALLOWED_FLAGS;
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262
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263 static {
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264 ALLOWED_FLAGS = new EnumMap<>(OperandMode.class);
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265 ALLOWED_FLAGS.put(USE, EnumSet.of(REG, STACK, COMPOSITE, CONST, ILLEGAL, HINT, UNINITIALIZED));
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266 ALLOWED_FLAGS.put(ALIVE, EnumSet.of(REG, STACK, COMPOSITE, CONST, ILLEGAL, HINT, UNINITIALIZED));
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267 ALLOWED_FLAGS.put(TEMP, EnumSet.of(REG, COMPOSITE, CONST, ILLEGAL, HINT));
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268 ALLOWED_FLAGS.put(DEF, EnumSet.of(REG, STACK, COMPOSITE, ILLEGAL, HINT));
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269 }
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270
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271 /**
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272 * The flags of the base and index value of an address.
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273 */
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274 protected static final EnumSet<OperandFlag> ADDRESS_FLAGS = EnumSet.of(REG, ILLEGAL);
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275
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276 private final LIRInstructionClass instructionClass;
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277
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278 /**
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279 * Instruction id for register allocation.
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280 */
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281 private int id;
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282
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283 private static final DebugMetric LIR_NODE_COUNT = Debug.metric("LIRNodes");
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284
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285 /**
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286 * Constructs a new LIR instruction.
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287 */
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288 public LIRInstruction() {
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289 LIR_NODE_COUNT.increment();
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290 instructionClass = LIRInstructionClass.get(getClass());
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291 id = -1;
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292 }
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293
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294 public abstract void emitCode(CompilationResultBuilder crb);
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295
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296 public final int id() {
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297 return id;
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298 }
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299
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300 public final void setId(int id) {
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301 this.id = id;
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302 }
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303
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304 /**
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305 * Gets the instruction name.
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306 */
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307 public final String name() {
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308 return instructionClass.getOpcode(this);
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309 }
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310
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311 public final boolean hasOperands() {
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312 return instructionClass.hasOperands() || hasState() || destroysCallerSavedRegisters();
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313 }
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314
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315 public final boolean hasState() {
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316 return instructionClass.hasState(this);
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317 }
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318
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319 /**
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320 * Determines if this instruction destroys all caller-saved registers..
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321 */
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322 public boolean destroysCallerSavedRegisters() {
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323 return false;
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324 }
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325
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326 public final void forEachInput(ValuePositionProcedure proc) {
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327 instructionClass.forEachUse(this, proc);
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328 }
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329
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330 public final void forEachAlive(ValuePositionProcedure proc) {
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331 instructionClass.forEachAlive(this, proc);
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332 }
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333
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334 public final void forEachTemp(ValuePositionProcedure proc) {
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335 instructionClass.forEachTemp(this, proc);
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336 }
266db8cf4dc6 Add LIRInstruction.forEach*(ValuePositionProcedure proc).
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337
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338 public final void forEachOutput(ValuePositionProcedure proc) {
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339 instructionClass.forEachDef(this, proc);
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340 }
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341
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342 public final void forEachInput(InstructionValueProcedure proc) {
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343 instructionClass.forEachUse(this, proc);
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344 }
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345
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346 public final void forEachAlive(InstructionValueProcedure proc) {
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347 instructionClass.forEachAlive(this, proc);
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348 }
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349
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350 public final void forEachTemp(InstructionValueProcedure proc) {
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351 instructionClass.forEachTemp(this, proc);
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352 }
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353
f315b1c0a590 Introduce InstructionValueProcedure.
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354 public final void forEachOutput(InstructionValueProcedure proc) {
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355 instructionClass.forEachDef(this, proc);
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356 }
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357
f315b1c0a590 Introduce InstructionValueProcedure.
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358 public final void forEachState(InstructionValueProcedure proc) {
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359 instructionClass.forEachState(this, proc);
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360 }
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361
16354
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362 public final void forEachState(InstructionStateProcedure proc) {
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363 instructionClass.forEachState(this, proc);
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364 }
141b15521a39 use annotated fields for operands of LIR instructions
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365
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366 /**
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367 * Iterates all register hints for the specified value, i.e., all preferred candidates for the
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368 * register to be assigned to the value.
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369 * <p>
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370 * Subclasses can override this method. The default implementation processes all Input operands
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371 * as the hints for an Output operand, and all Output operands as the hints for an Input
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372 * operand.
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373 *
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374 * @param value The value the hints are needed for.
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375 * @param mode The operand mode of the value.
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376 * @param proc The procedure invoked for all the hints. If the procedure returns a non-null
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377 * value, the iteration is stopped and the value is returned by this method, i.e.,
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378 * clients can stop the iteration once a suitable hint has been found.
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379 * @return The non-null value returned by the procedure, or null.
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380 */
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diff changeset
381 public Value forEachRegisterHint(Value value, OperandMode mode, InstructionValueProcedure proc) {
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diff changeset
382 return instructionClass.forEachRegisterHint(this, mode, proc);
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383 }
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384
4323
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diff changeset
385 protected void verify() {
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386 }
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387
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388 public final String toStringWithIdPrefix() {
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diff changeset
389 if (id != -1) {
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390 return String.format("%4d %s", id, toString());
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391 }
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392 return " " + toString();
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393 }
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394
4169
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diff changeset
395 @Override
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396 public String toString() {
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397 return instructionClass.toString(this);
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398 }
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diff changeset
399
2bcba15fa725 Introduce LIRInstructionClass.Position.
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diff changeset
400 public LIRInstructionClass getLIRInstructionClass() {
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diff changeset
401 return instructionClass;
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diff changeset
402 }
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403 }