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annotate graal/com.oracle.graal.lir/src/com/oracle/graal/lir/StandardOp.java @ 21198:d2bae7605fe4

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Introduce StackMove LIR instruction.
author Josef Eisl <josef.eisl@jku.at>
date Mon, 27 Apr 2015 10:57:34 +0200
parents aa8e0e2c5751
children 04339fd2c863
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2011, 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
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27 import java.util.*;
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28
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29 import com.oracle.graal.api.code.*;
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30 import com.oracle.graal.api.meta.*;
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31 import com.oracle.graal.asm.*;
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32 import com.oracle.graal.compiler.common.*;
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33 import com.oracle.graal.compiler.common.cfg.*;
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34 import com.oracle.graal.lir.asm.*;
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35 import com.oracle.graal.lir.framemap.*;
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36
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37 /**
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38 * A collection of machine-independent LIR operations, as well as interfaces to be implemented for
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39 * specific kinds or LIR operations.
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40 */
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41 public class StandardOp {
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42
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43 /**
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44 * A block delimiter. Every well formed block must contain exactly one such operation and it
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45 * must be the last operation in the block.
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46 */
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47 public interface BlockEndOp {
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48 }
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49
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50 public interface NullCheck {
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51 Value getCheckedValue();
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52
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53 LIRFrameState getState();
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54 }
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55
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56 public interface ImplicitNullCheck {
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57 boolean makeNullCheckFor(Value value, LIRFrameState nullCheckState, int implicitNullCheckLimit);
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58 }
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59
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60 /**
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61 * LIR operation that defines the position of a label.
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62 */
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63 public static final class LabelOp extends LIRInstruction {
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64 public static final LIRInstructionClass<LabelOp> TYPE = LIRInstructionClass.create(LabelOp.class);
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65
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66 private static final Value[] NO_VALUES = new Value[0];
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67
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68 /**
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69 * In the LIR, every register and variable must be defined before it is used. For method
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70 * parameters that are passed in fixed registers, exception objects passed to the exception
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71 * handler in a fixed register, or any other use of a fixed register not defined in this
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72 * method, an artificial definition is necessary. To avoid spill moves to be inserted
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73 * between the label at the beginning of a block an an actual definition in the second
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74 * instruction of a block, the registers are defined here in the label.
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75 */
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76 @Def({REG, STACK}) private Value[] incomingValues;
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77
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78 private final Label label;
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79 private final boolean align;
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80
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81 public LabelOp(Label label, boolean align) {
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82 super(TYPE);
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83 this.label = label;
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84 this.align = align;
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85 this.incomingValues = NO_VALUES;
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86 }
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87
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88 public void setIncomingValues(Value[] values) {
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89 assert incomingValues.length == 0;
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90 incomingValues = values;
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91 }
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92
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93 @Override
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94 public void emitCode(CompilationResultBuilder crb) {
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95 if (align) {
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96 crb.asm.align(crb.target.wordSize * 2);
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97 }
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98 crb.asm.bind(label);
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99 }
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100
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101 public Label getLabel() {
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102 return label;
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103 }
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104 }
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105
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106 /**
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107 * LIR operation that is an unconditional jump to a {@link #destination()}.
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108 */
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109 public static class JumpOp extends LIRInstruction implements BlockEndOp {
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110 public static final LIRInstructionClass<JumpOp> TYPE = LIRInstructionClass.create(JumpOp.class);
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111
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112 private final LabelRef destination;
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113
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114 public JumpOp(LabelRef destination) {
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115 this(TYPE, destination);
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116 }
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117
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118 protected JumpOp(LIRInstructionClass<? extends JumpOp> c, LabelRef destination) {
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119 super(c);
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120 this.destination = destination;
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121 }
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122
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123 @Override
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124 public void emitCode(CompilationResultBuilder crb) {
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125 if (!crb.isSuccessorEdge(destination)) {
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126 crb.asm.jmp(destination.label());
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127 }
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128 }
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129
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130 public LabelRef destination() {
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131 return destination;
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132 }
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133 }
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134
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135 /**
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136 * Marker interface for a LIR operation that is a conditional jump.
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137 */
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138 public interface BranchOp extends BlockEndOp {
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139 }
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140
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141 /**
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142 * Marker interface for a LIR operation that moves a value from {@link #getInput()} to
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143 * {@link #getResult()}.
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144 */
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145 public interface MoveOp {
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146
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147 Value getInput();
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148
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149 AllocatableValue getResult();
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150 }
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151
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152 /**
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153 * An operation that saves registers to the stack. The set of saved registers can be
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154 * {@linkplain #remove(Set) pruned} and a mapping from registers to the frame slots in which
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155 * they are saved can be {@linkplain #getMap(FrameMap) retrieved}.
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156 */
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157 public interface SaveRegistersOp {
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158
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159 /**
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160 * Determines if the {@link #remove(Set)} operation is supported for this object.
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161 */
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162 boolean supportsRemove();
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163
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164 /**
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165 * Prunes {@code doNotSave} from the registers saved by this operation.
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166 *
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167 * @param doNotSave registers that should not be saved by this operation
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168 * @return the number of registers pruned
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169 * @throws UnsupportedOperationException if removal is not {@linkplain #supportsRemove()
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170 * supported}
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171 */
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172 int remove(Set<Register> doNotSave);
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173
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174 /**
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175 * Gets a map from the saved registers saved by this operation to the frame slots in which
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176 * they are saved.
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177 *
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185bd9096c88 Remove FrameMap.indexForStackSlot().
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178 * @param frameMap used to {@linkplain FrameMap#offsetForStackSlot(StackSlot) convert} a
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179 * virtual slot to a frame slot index
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180 */
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181 RegisterSaveLayout getMap(FrameMap frameMap);
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182
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183 }
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184
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185 /**
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186 * A LIR operation that does nothing. If the operation records its position, it can be
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187 * subsequently {@linkplain #replace(LIR, LIRInstruction) replaced}.
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188 */
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189 public static final class NoOp extends LIRInstruction {
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190 public static final LIRInstructionClass<NoOp> TYPE = LIRInstructionClass.create(NoOp.class);
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191
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192 /**
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193 * The block in which this instruction is located.
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194 */
19560
4d70d150944f Remove AbstractBlock interface.
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195 final AbstractBlockBase<?> block;
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196
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197 /**
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198 * The block index of this instruction.
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199 */
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200 final int index;
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201
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202 public NoOp(AbstractBlockBase<?> block, int index) {
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203 super(TYPE);
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204 this.block = block;
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205 this.index = index;
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206 }
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207
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208 public void replace(LIR lir, LIRInstruction replacement) {
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aa8e0e2c5751 StandardOp.NoOp: assert that the right instruction is #replaced.
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209 List<LIRInstruction> instructions = lir.getLIRforBlock(block);
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210 assert instructions.get(index).equals(this) : String.format("Replacing the wrong instruction: %s instead of %s", instructions.get(index), this);
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211 instructions.set(index, replacement);
9247
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212 }
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213
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diff changeset
214 @Override
13227
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diff changeset
215 public void emitCode(CompilationResultBuilder crb) {
13313
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diff changeset
216 if (block != null) {
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217 throw new GraalInternalError(this + " should have been replaced");
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218 }
9247
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219 }
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220 }
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221
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222 @Opcode("BLACKHOLE")
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223 public static final class BlackholeOp extends LIRInstruction {
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224 public static final LIRInstructionClass<BlackholeOp> TYPE = LIRInstructionClass.create(BlackholeOp.class);
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225
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226 @Use({REG, STACK}) private Value value;
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227
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228 public BlackholeOp(Value value) {
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229 super(TYPE);
18933
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230 this.value = value;
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231 }
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232
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diff changeset
233 @Override
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234 public void emitCode(CompilationResultBuilder crb) {
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235 // do nothing, just keep value alive until at least here
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236 }
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237 }
21198
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238
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239 public static final class StackMove extends LIRInstruction implements MoveOp {
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240 public static final LIRInstructionClass<StackMove> TYPE = LIRInstructionClass.create(StackMove.class);
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241
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242 @Def({STACK, HINT}) protected AllocatableValue result;
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243 @Use({STACK}) protected Value input;
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244
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245 public StackMove(AllocatableValue result, Value input) {
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246 super(TYPE);
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247 this.result = result;
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248 this.input = input;
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249 }
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250
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251 @Override
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252 public void emitCode(CompilationResultBuilder crb) {
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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253 throw new GraalInternalError(this + " should have been removed");
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254 }
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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255
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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256 @Override
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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257 public Value getInput() {
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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258 return input;
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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259 }
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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260
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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261 @Override
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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262 public AllocatableValue getResult() {
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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263 return result;
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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264 }
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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265 }
d2bae7605fe4 Introduce StackMove LIR instruction.
Josef Eisl <josef.eisl@jku.at>
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266
3733
e233f5660da4 Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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267 }