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annotate graal/com.oracle.graal.lir/src/com/oracle/graal/lir/LIR.java @ 7530:5e3d1a68664e

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applied mx eclipseformat to all Java files
author Doug Simon <doug.simon@oracle.com>
date Wed, 23 Jan 2013 16:34:57 +0100
parents 2e96dc4eb8e2
children 5f0876b77ca8
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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 java.util.*;
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26
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27 import com.oracle.graal.api.meta.*;
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28 import com.oracle.graal.debug.*;
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29 import com.oracle.graal.graph.*;
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30 import com.oracle.graal.lir.asm.*;
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31 import com.oracle.graal.nodes.*;
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32 import com.oracle.graal.nodes.cfg.*;
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34 /**
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35 * This class implements the overall container for the LIR graph and directs its construction,
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36 * optimization, and finalization.
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37 */
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38 public class LIR {
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39
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40 public final ControlFlowGraph cfg;
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41
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42 /**
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43 * The nodes for the blocks. TODO: This should go away, we want all nodes connected with a
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44 * next-pointer.
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45 */
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46 private final BlockMap<List<ScheduledNode>> blockToNodesMap;
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47
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48 /**
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49 * The linear-scan ordered list of blocks.
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50 */
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51 private final List<Block> linearScanOrder;
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52
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53 /**
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54 * The order in which the code is emitted.
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55 */
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56 private final List<Block> codeEmittingOrder;
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57
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58 /**
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59 * Various out-of-line stubs to be emitted near the end of the method after all other LIR code
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60 * has been emitted.
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61 */
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62 public final List<Code> stubs;
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63
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64 private int numVariables;
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65
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66 public SpillMoveFactory spillMoveFactory;
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67
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68 public final BlockMap<List<LIRInstruction>> lirInstructions;
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69
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70 public interface SpillMoveFactory {
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71
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72 LIRInstruction createMove(Value result, Value input);
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73
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74 LIRInstruction createExchange(Value input1, Value input2);
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75 }
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76
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77 private boolean hasArgInCallerFrame;
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78
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79 /**
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80 * An opaque chunk of machine code.
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81 */
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82 public interface Code {
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83
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84 void emitCode(TargetMethodAssembler tasm);
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85
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86 /**
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87 * A description of this code stub useful for commenting the code in a disassembly.
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88 */
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89 String description();
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90 }
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91
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92 /**
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93 * Creates a new LIR instance for the specified compilation.
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94 */
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95 public LIR(ControlFlowGraph cfg, BlockMap<List<ScheduledNode>> blockToNodesMap, List<Block> linearScanOrder, List<Block> codeEmittingOrder) {
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96 this.cfg = cfg;
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97 this.blockToNodesMap = blockToNodesMap;
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98 this.codeEmittingOrder = codeEmittingOrder;
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99 this.linearScanOrder = linearScanOrder;
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100 this.lirInstructions = new BlockMap<>(cfg);
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101
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102 stubs = new ArrayList<>();
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103 }
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104
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105 /**
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106 * Gets the nodes in a given block.
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107 */
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108 public List<ScheduledNode> nodesFor(Block block) {
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109 return blockToNodesMap.get(block);
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110 }
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111
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112 /**
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113 * Determines if any instruction in the LIR has any debug info associated with it.
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114 */
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115 public boolean hasDebugInfo() {
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116 for (Block b : linearScanOrder()) {
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117 for (LIRInstruction op : lir(b)) {
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118 if (op.hasState()) {
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119 return true;
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120 }
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121 }
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122 }
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123 return false;
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124 }
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125
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126 public List<LIRInstruction> lir(Block block) {
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127 return lirInstructions.get(block);
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128 }
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129
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130 public void setLir(Block block, List<LIRInstruction> list) {
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131 assert lir(block) == null : "lir instruction list should only be initialized once";
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132 lirInstructions.put(block, list);
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133 }
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134
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135 /**
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136 * Gets the linear scan ordering of blocks as a list.
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137 *
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138 * @return the blocks in linear scan order
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139 */
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140 public List<Block> linearScanOrder() {
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141 return linearScanOrder;
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142 }
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143
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144 public List<Block> codeEmittingOrder() {
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145 return codeEmittingOrder;
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146 }
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147
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148 public int numVariables() {
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149 return numVariables;
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150 }
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151
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152 public int nextVariable() {
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153 return numVariables++;
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154 }
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155
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156 public void emitCode(TargetMethodAssembler tasm) {
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157 if (tasm.frameContext != null) {
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158 tasm.frameContext.enter(tasm);
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159 }
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160
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161 for (Block b : codeEmittingOrder()) {
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162 emitBlock(tasm, b);
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163 }
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164
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165 // generate code stubs
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166 for (Code c : stubs) {
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167 emitCodeStub(tasm, c);
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168 }
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169 }
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170
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171 private void emitBlock(TargetMethodAssembler tasm, Block block) {
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172 if (Debug.isDumpEnabled()) {
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173 tasm.blockComment(String.format("block B%d %s", block.getId(), block.getLoop()));
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174 }
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175
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176 for (LIRInstruction op : lir(block)) {
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177 if (Debug.isDumpEnabled()) {
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178 tasm.blockComment(String.format("%d %s", op.id(), op));
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179 }
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180
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181 emitOp(tasm, op);
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182 }
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183 }
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184
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185 private static void emitOp(TargetMethodAssembler tasm, LIRInstruction op) {
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186 try {
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187 try {
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188 op.emitCode(tasm);
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189 } catch (AssertionError t) {
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190 throw new GraalInternalError(t);
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191 } catch (RuntimeException t) {
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192 throw new GraalInternalError(t);
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193 }
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194 } catch (GraalInternalError e) {
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195 throw e.addContext("lir instruction", op);
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196 }
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197 }
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198
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199 private static void emitCodeStub(TargetMethodAssembler tasm, Code code) {
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200 if (Debug.isDumpEnabled()) {
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201 tasm.blockComment(String.format("code stub: %s", code.description()));
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202 }
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203 code.emitCode(tasm);
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204 }
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205
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206 public void setHasArgInCallerFrame() {
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207 hasArgInCallerFrame = true;
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208 }
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209
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210 /**
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211 * Determines if any of the parameters to the method are passed via the stack where the
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212 * parameters are located in the caller's frame.
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213 */
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214 public boolean hasArgInCallerFrame() {
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215 return hasArgInCallerFrame;
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216 }
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217 }