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annotate graal/GraalCompiler/src/com/sun/c1x/lir/LIRBlock.java @ 2777:3e4d992fd312

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towards replacing computelinearscanorder with scheduler.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Tue, 24 May 2011 14:40:47 +0200
parents 43ffa0e47a46
children 2ac7b30b7290
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1 /*
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2 * Copyright (c) 2009, 2011, 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.sun.c1x.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.max.asm.*;
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28 import com.sun.c1x.alloc.*;
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29 import com.sun.c1x.debug.*;
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30 import com.sun.c1x.ir.*;
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31 import com.sun.c1x.util.*;
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32 import com.sun.c1x.value.*;
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33 import com.sun.cri.ci.*;
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34
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35 /**
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36 * The {@code LIRBlock} class definition.
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37 */
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38 public final class LIRBlock {
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39
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40 public final Label label = new Label();
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41 private LIRList lir;
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42 private final int blockID;
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43 private List<Instruction> instructions = new ArrayList<Instruction>(4);
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44 private List<LIRBlock> predecessors = new ArrayList<LIRBlock>(4);
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45 private List<LIRBlock> successors = new ArrayList<LIRBlock>(4);
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46 private List<Phi> phis = new ArrayList<Phi>(4);
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47
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48 /**
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49 * Bit map specifying which {@linkplain OperandPool operands} are live upon entry to this block.
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50 * These are values used in this block or any of its successors where such value are not defined
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51 * in this block.
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52 * The bit index of an operand is its {@linkplain OperandPool#operandNumber(com.sun.cri.ci.CiValue) operand number}.
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53 */
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54 public CiBitMap liveIn;
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55
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56 /**
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57 * Bit map specifying which {@linkplain OperandPool operands} are live upon exit from this block.
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58 * These are values used in a successor block that are either defined in this block or were live
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59 * upon entry to this block.
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60 * The bit index of an operand is its {@linkplain OperandPool#operandNumber(com.sun.cri.ci.CiValue) operand number}.
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61 */
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62 public CiBitMap liveOut;
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63
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64 /**
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65 * Bit map specifying which {@linkplain OperandPool operands} are used (before being defined) in this block.
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66 * That is, these are the values that are live upon entry to the block.
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67 * The bit index of an operand is its {@linkplain OperandPool#operandNumber(com.sun.cri.ci.CiValue) operand number}.
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68 */
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69 public CiBitMap liveGen;
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70
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71 /**
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72 * Bit map specifying which {@linkplain OperandPool operands} are defined/overwritten in this block.
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73 * The bit index of an operand is its {@linkplain OperandPool#operandNumber(com.sun.cri.ci.CiValue) operand number}.
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74 */
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75 public CiBitMap liveKill;
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76
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77 private int firstLirInstructionID;
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78 private int lastLirInstructionID;
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79 public int blockEntryPco;
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80
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81 public LIRBlock(int blockID) {
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82 this.blockID = blockID;
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83 loopIndex = -1;
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84 linearScanNumber = blockID;
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85 }
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86
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87 public List<Instruction> getInstructions() {
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88 return instructions;
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89 }
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90
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91 public int firstLirInstructionId() {
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92 return firstLirInstructionID;
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93 }
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94
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95 public void setFirstLirInstructionId(int firstLirInstructionId) {
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96 this.firstLirInstructionID = firstLirInstructionId;
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97 }
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98
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99 public int lastLirInstructionId() {
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100 return lastLirInstructionID;
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101 }
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102
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103 public void setLastLirInstructionId(int lastLirInstructionId) {
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104 this.lastLirInstructionID = lastLirInstructionId;
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105 }
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106
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107 public int loopDepth;
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108 public int loopIndex;
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109
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110 public LIRList lir() {
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111 return lir;
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112 }
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113
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114 public void setLir(LIRList lir) {
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115 this.lir = lir;
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116 }
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117
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118 public void setBlockEntryPco(int codePos) {
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119 this.blockEntryPco = codePos;
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120 }
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121
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122 public void printWithoutPhis(LogStream out) {
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123 out.println("LIR Block " + blockID());
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124 }
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125
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126 public int blockID() {
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127 return blockID;
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128 }
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129
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130 public int numberOfPreds() {
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131 return predecessors.size();
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132 }
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133
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134 public int numberOfSux() {
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135 return successors.size();
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136 }
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137
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138 public boolean isPredecessor(LIRBlock block) {
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139 return predecessors.contains(block);
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140 }
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141
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142 public LIRBlock predAt(int i) {
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143 return predecessors.get(i);
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144 }
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145
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146 public LIRBlock suxAt(int i) {
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147 return successors.get(i);
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148 }
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149
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150 public List<LIRBlock> blockSuccessors() {
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151 return successors;
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152 }
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153
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154 public List<LIRBlock> blockPredecessors() {
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155 return predecessors;
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156 }
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157
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158 public int loopDepth() {
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159 // TODO(tw): Set correct loop depth.
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160 return 0;
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161 }
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162
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163 public int loopIndex() {
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164 // TODO(tw): Set correct loop index.
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165 return -1;
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166 }
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167
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168 public Label label() {
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169 return label;
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170 }
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171
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172 private int linearScanNumber = -1;
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173 private boolean linearScanLoopEnd;
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174 private boolean linearScanLoopHeader;
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175 private FrameState stateBefore;
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176
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177 public void setLinearScanNumber(int v) {
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178 linearScanNumber = v;
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179 }
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180
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181 public int linearScanNumber() {
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182 return linearScanNumber;
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183 }
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184
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185 public void setLinearScanLoopEnd() {
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186 linearScanLoopEnd = true;
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187 }
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188
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189 public boolean isLinearScanLoopEnd() {
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190 return linearScanLoopEnd;
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191 }
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192
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193 public void setLinearScanLoopHeader() {
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194 this.linearScanLoopHeader = true;
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195 }
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196
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197 public boolean isLinearScanLoopHeader() {
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198 return linearScanLoopHeader;
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199 }
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200
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201 public void setStateBefore(FrameState stateBefore) {
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202 this.stateBefore = stateBefore;
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203 }
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204
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205 public FrameState stateBefore() {
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206 return stateBefore;
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207 }
2761
d3398b21faf9 Re-enabled CFG optimization (now only on LIRBlock data structure).
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208
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209 public void replaceWith(LIRBlock other) {
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210 for (LIRBlock pred : predecessors) {
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211 Util.replaceAllInList(this, other, pred.successors);
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212 }
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213 for (int i = 0; i < other.predecessors.size(); ++i) {
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214 if (other.predecessors.get(i) == this) {
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215 other.predecessors.remove(i);
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216 other.predecessors.addAll(i, this.predecessors);
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217 }
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218 }
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219 successors.clear();
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220 predecessors.clear();
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221 }
2777
3e4d992fd312 towards replacing computelinearscanorder with scheduler.
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222
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223 public void setInstructions(List<Instruction> list) {
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224 instructions = list;
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225 }
2507
9ec15d6914ca Pull over of compiler from maxine repository.
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226 }