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annotate graal/com.oracle.graal.lir/src/com/oracle/graal/lir/LIRInstruction.java @ 16796:0d47af538a92

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Outsource Value/StateProcedure classes into files.
author Josef Eisl <josef.eisl@jku.at>
date Tue, 12 Aug 2014 16:18:07 +0200
parents b6e70c59b32d
children a62a928287e4
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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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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 /**
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125 * The value can be a {@link CompositeValue}.
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126 */
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127 COMPOSITE,
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128
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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 public final void forEachInput(ValuePositionProcedure proc) {
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221 instructionClass.forEachUse(this, proc);
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222 }
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223
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224 public final void forEachAlive(ValuePositionProcedure proc) {
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225 instructionClass.forEachAlive(this, proc);
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226 }
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227
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228 public final void forEachTemp(ValuePositionProcedure proc) {
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229 instructionClass.forEachTemp(this, proc);
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230 }
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231
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232 public final void forEachOutput(ValuePositionProcedure proc) {
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233 instructionClass.forEachDef(this, proc);
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234 }
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235
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236 public final void forEachInput(InstructionValueProcedure proc) {
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237 instructionClass.forEachUse(this, proc);
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238 }
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239
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240 public final void forEachAlive(InstructionValueProcedure proc) {
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241 instructionClass.forEachAlive(this, proc);
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242 }
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243
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244 public final void forEachTemp(InstructionValueProcedure proc) {
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245 instructionClass.forEachTemp(this, proc);
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246 }
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247
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248 public final void forEachOutput(InstructionValueProcedure proc) {
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249 instructionClass.forEachDef(this, proc);
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250 }
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251
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252 public final void forEachState(InstructionValueProcedure proc) {
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253 instructionClass.forEachState(this, proc);
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254 }
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255
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256 public final void forEachState(InstructionStateProcedure proc) {
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257 instructionClass.forEachState(this, proc);
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258 }
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259
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260 /**
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261 * Iterates all register hints for the specified value, i.e., all preferred candidates for the
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262 * register to be assigned to the value.
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263 * <p>
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264 * Subclasses can override this method. The default implementation processes all Input operands
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265 * as the hints for an Output operand, and all Output operands as the hints for an Input
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266 * operand.
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267 *
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268 * @param value The value the hints are needed for.
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269 * @param mode The operand mode of the value.
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270 * @param proc The procedure invoked for all the hints. If the procedure returns a non-null
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271 * value, the iteration is stopped and the value is returned by this method, i.e.,
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272 * clients can stop the iteration once a suitable hint has been found.
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273 * @return The non-null value returned by the procedure, or null.
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274 */
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275 public Value forEachRegisterHint(Value value, OperandMode mode, InstructionValueProcedure proc) {
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276 return instructionClass.forEachRegisterHint(this, mode, proc);
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277 }
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278
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279 protected void verify() {
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280 }
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281
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282 public final String toStringWithIdPrefix() {
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283 if (id != -1) {
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284 return String.format("%4d %s", id, toString());
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285 }
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286 return " " + toString();
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287 }
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288
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289 @Override
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290 public String toString() {
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291 return instructionClass.toString(this);
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292 }
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293
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294 public LIRInstructionClass getLIRInstructionClass() {
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295 return instructionClass;
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296 }
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297 }