Mercurial > hg > graal-compiler
annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/cfg/Block.java @ 6529:2e96dc4eb8e2
renamed package: com.oracle.graal.lir.cfg -> com.oracle.graal.nodes.cfg
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 08 Oct 2012 17:30:11 +0200 |
parents | graal/com.oracle.graal.nodes/src/com/oracle/graal/lir/cfg/Block.java@c5afcc2ebd3d |
children | b5280041f59e |
rev | line source |
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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.nodes.cfg; |
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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.nodes.*; |
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28 import com.oracle.graal.nodes.java.*; |
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29 |
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30 public class Block { |
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31 |
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32 protected int id; |
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33 |
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34 protected BeginNode beginNode; |
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35 protected FixedNode endNode; |
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36 protected Loop loop; |
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37 protected double probability; |
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38 |
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39 protected List<Block> predecessors; |
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40 protected List<Block> successors; |
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41 |
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42 protected Block dominator; |
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43 protected List<Block> dominated; |
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44 protected Block postdominator; |
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45 |
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46 // Fields that still need to be worked on, try to remove them later. |
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47 public boolean align; |
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48 public int linearScanNumber; |
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49 |
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50 protected Block() { |
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51 id = ControlFlowGraph.BLOCK_ID_INITIAL; |
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52 } |
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53 |
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54 public int getId() { |
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55 return id; |
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56 } |
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57 |
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58 public BeginNode getBeginNode() { |
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59 return beginNode; |
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60 } |
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61 |
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62 public FixedNode getEndNode() { |
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63 return endNode; |
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64 } |
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65 |
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66 public Loop getLoop() { |
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67 return loop; |
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68 } |
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69 |
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70 public int getLoopDepth() { |
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71 return loop == null ? 0 : loop.depth; |
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72 } |
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73 |
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74 public boolean isLoopHeader() { |
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75 return getBeginNode() instanceof LoopBeginNode; |
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76 } |
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77 |
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78 public boolean isLoopEnd() { |
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79 return getEndNode() instanceof LoopEndNode; |
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80 } |
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81 |
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82 public boolean isExceptionEntry() { |
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83 return getBeginNode().next() instanceof ExceptionObjectNode; |
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84 } |
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85 |
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86 public List<Block> getPredecessors() { |
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87 return predecessors; |
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88 } |
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89 |
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90 public List<Block> getSuccessors() { |
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91 return successors; |
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92 } |
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93 |
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94 public Block getDominator() { |
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95 return dominator; |
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96 } |
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97 |
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98 public Block getEarliestPostDominated() { |
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99 Block b = this; |
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100 while (true) { |
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101 Block dom = b.getDominator(); |
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102 if (dom != null && dom.getPostdominator() == b) { |
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103 b = dom; |
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104 } else { |
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105 break; |
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106 } |
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107 } |
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108 return b; |
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109 } |
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110 |
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111 public List<Block> getDominated() { |
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112 if (dominated == null) { |
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113 return Collections.emptyList(); |
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114 } |
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115 return dominated; |
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116 } |
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117 |
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118 public Block getPostdominator() { |
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119 return postdominator; |
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120 } |
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121 |
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122 private class NodeIterator implements Iterator<FixedNode> { |
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123 private FixedNode cur; |
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124 |
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125 public NodeIterator() { |
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126 cur = getBeginNode(); |
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127 } |
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128 |
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129 @Override |
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130 public boolean hasNext() { |
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131 return cur != null; |
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132 } |
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133 |
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134 @Override |
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135 public FixedNode next() { |
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136 FixedNode result = cur; |
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137 if (cur == getEndNode()) { |
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138 cur = null; |
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139 } else { |
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140 cur = ((FixedWithNextNode) cur).next(); |
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141 } |
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142 assert !(cur instanceof BeginNode); |
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143 return result; |
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144 } |
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145 |
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146 @Override |
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147 public void remove() { |
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148 throw new UnsupportedOperationException(); |
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149 } |
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150 } |
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151 |
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152 public Iterable<FixedNode> getNodes() { |
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153 return new Iterable<FixedNode>() { |
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154 @Override |
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155 public Iterator<FixedNode> iterator() { |
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156 return new NodeIterator(); |
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157 } |
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158 |
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159 @Override |
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160 public String toString() { |
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161 StringBuilder str = new StringBuilder().append('['); |
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162 for (FixedNode node : this) { |
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163 str.append(node).append(", "); |
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164 } |
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165 if (str.length() > 1) { |
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166 str.setLength(str.length() - 2); |
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167 } |
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168 return str.append(']').toString(); |
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169 } |
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170 }; |
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171 } |
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172 |
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173 @Override |
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174 public String toString() { |
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175 return "B" + id; |
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176 } |
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177 |
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178 |
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179 // to be inlined later on |
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180 public int numberOfPreds() { |
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181 return getPredecessors().size(); |
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182 } |
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183 |
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184 public int numberOfSux() { |
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185 return getSuccessors().size(); |
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186 } |
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187 |
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188 public Block predAt(int i) { |
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189 return getPredecessors().get(i); |
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190 } |
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191 |
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192 public Block suxAt(int i) { |
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193 return getSuccessors().get(i); |
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194 } |
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195 // end to be inlined later on |
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196 |
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197 public boolean dominates(Block block) { |
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198 return block.isDominatedBy(this); |
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199 } |
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200 |
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201 public boolean isDominatedBy(Block block) { |
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202 if (block == this) { |
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203 return true; |
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204 } |
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205 if (dominator == null) { |
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206 return false; |
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207 } |
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208 return dominator.isDominatedBy(block); |
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209 } |
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210 } |