Mercurial > hg > graal-compiler
annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/cfg/Block.java @ 15107:1bf700e19e84
Make Loop generic.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Wed, 09 Apr 2014 17:11:48 +0200 |
parents | 18d5ffb7ac38 |
children | df2ef5204f2b |
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 |
14797 | 30 public final class Block extends AbstractBlockBase<Block> { |
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31 |
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32 protected final AbstractBeginNode beginNode; |
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33 |
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34 protected FixedNode endNode; |
15107 | 35 protected Loop<Block> loop; |
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36 |
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37 protected List<Block> dominated; |
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38 protected Block postdominator; |
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39 |
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40 protected Block(AbstractBeginNode node) { |
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41 this.beginNode = node; |
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42 } |
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43 |
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44 public AbstractBeginNode getBeginNode() { |
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45 return beginNode; |
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46 } |
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47 |
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48 public FixedNode getEndNode() { |
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49 return endNode; |
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50 } |
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51 |
15107 | 52 public Loop<Block> getLoop() { |
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53 return loop; |
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54 } |
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55 |
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56 public int getLoopDepth() { |
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57 return loop == null ? 0 : loop.depth; |
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58 } |
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59 |
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60 public boolean isLoopHeader() { |
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61 return getBeginNode() instanceof LoopBeginNode; |
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62 } |
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63 |
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64 public boolean isLoopEnd() { |
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65 return getEndNode() instanceof LoopEndNode; |
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66 } |
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67 |
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68 public boolean isExceptionEntry() { |
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69 return getBeginNode() instanceof ExceptionObjectNode; |
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70 } |
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71 |
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72 public Block getFirstPredecessor() { |
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73 return predecessors.get(0); |
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74 } |
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75 |
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76 public Block getFirstSuccessor() { |
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77 return successors.get(0); |
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78 } |
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79 |
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80 public Block getEarliestPostDominated() { |
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81 Block b = this; |
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82 while (true) { |
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83 Block dom = b.getDominator(); |
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84 if (dom != null && dom.getPostdominator() == b) { |
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85 b = dom; |
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86 } else { |
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87 break; |
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88 } |
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89 } |
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90 return b; |
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91 } |
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92 |
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93 public List<Block> getDominated() { |
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94 if (dominated == null) { |
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95 return Collections.emptyList(); |
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96 } |
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97 return dominated; |
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98 } |
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99 |
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100 public Block getPostdominator() { |
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101 return postdominator; |
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102 } |
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103 |
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104 private class NodeIterator implements Iterator<FixedNode> { |
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105 |
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106 private FixedNode cur; |
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107 |
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108 public NodeIterator() { |
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109 cur = getBeginNode(); |
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110 } |
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111 |
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112 @Override |
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113 public boolean hasNext() { |
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114 return cur != null; |
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115 } |
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116 |
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117 @Override |
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118 public FixedNode next() { |
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119 FixedNode result = cur; |
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120 if (cur == getEndNode()) { |
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121 cur = null; |
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122 } else { |
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123 cur = ((FixedWithNextNode) cur).next(); |
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124 } |
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125 assert !(cur instanceof AbstractBeginNode); |
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126 return result; |
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127 } |
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128 |
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129 @Override |
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130 public void remove() { |
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131 throw new UnsupportedOperationException(); |
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132 } |
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133 } |
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134 |
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135 public Iterable<FixedNode> getNodes() { |
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136 return new Iterable<FixedNode>() { |
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137 |
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138 @Override |
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139 public Iterator<FixedNode> iterator() { |
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140 return new NodeIterator(); |
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141 } |
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142 |
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143 @Override |
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144 public String toString() { |
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145 StringBuilder str = new StringBuilder().append('['); |
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146 for (FixedNode node : this) { |
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147 str.append(node).append(", "); |
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148 } |
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149 if (str.length() > 1) { |
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150 str.setLength(str.length() - 2); |
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151 } |
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152 return str.append(']').toString(); |
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153 } |
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154 }; |
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155 } |
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156 |
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157 @Override |
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158 public String toString() { |
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159 return "B" + id; |
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160 } |
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161 |
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162 public boolean dominates(Block block) { |
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163 return block.isDominatedBy(this); |
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164 } |
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165 |
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166 public boolean isDominatedBy(Block block) { |
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167 if (block == this) { |
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168 return true; |
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169 } |
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170 if (dominator == null) { |
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171 return false; |
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172 } |
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173 return dominator.isDominatedBy(block); |
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174 } |
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175 |
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176 } |