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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/cfg/Block.java @ 15385:63aad7e1c867

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fix comparison in Block.isExceptionEntry
author Lukas Stadler <lukas.stadler@oracle.com>
date Fri, 25 Apr 2014 11:36:15 +0200
parents 669536c4949a
children c55f44b3c5e5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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.compiler.common.cfg.*;
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28 import com.oracle.graal.graph.*;
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29 import com.oracle.graal.nodes.*;
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30
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31 public final class Block extends AbstractBlockBase<Block> {
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32
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33 protected final BeginNode beginNode;
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34
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35 protected FixedNode endNode;
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36 protected Loop<Block> loop;
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37
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38 protected List<Block> dominated;
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39 protected Block postdominator;
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40
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41 protected Block(BeginNode node) {
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42 this.beginNode = node;
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43 }
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44
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45 public BeginNode getBeginNode() {
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46 return beginNode;
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47 }
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48
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49 public FixedNode getEndNode() {
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50 return endNode;
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51 }
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52
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53 public Loop<Block> getLoop() {
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54 return loop;
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55 }
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56
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57 public int getLoopDepth() {
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58 return loop == null ? 0 : loop.depth;
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59 }
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60
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61 public boolean isLoopHeader() {
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62 return getBeginNode() instanceof LoopBeginNode;
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63 }
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64
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65 public boolean isLoopEnd() {
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66 return getEndNode() instanceof LoopEndNode;
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67 }
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68
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69 public boolean isExceptionEntry() {
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70 Node predecessor = getBeginNode().predecessor();
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71 return predecessor != null && predecessor instanceof InvokeWithExceptionNode && getBeginNode() == ((InvokeWithExceptionNode) predecessor).exceptionEdge();
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72 }
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73
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74 public Block getFirstPredecessor() {
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75 return getPredecessors().get(0);
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76 }
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77
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78 public Block getFirstSuccessor() {
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79 return getSuccessors().get(0);
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80 }
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81
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82 public Block getEarliestPostDominated() {
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83 Block b = this;
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84 while (true) {
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85 Block dom = b.getDominator();
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86 if (dom != null && dom.getPostdominator() == b) {
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87 b = dom;
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88 } else {
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89 break;
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90 }
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91 }
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92 return b;
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93 }
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94
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95 public List<Block> getDominated() {
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96 if (dominated == null) {
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97 return Collections.emptyList();
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98 }
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99 return dominated;
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100 }
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101
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102 public Block getPostdominator() {
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103 return postdominator;
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104 }
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105
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106 private class NodeIterator implements Iterator<FixedNode> {
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107
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108 private FixedNode cur;
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109
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110 public NodeIterator() {
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111 cur = getBeginNode();
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112 }
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113
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114 @Override
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115 public boolean hasNext() {
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116 return cur != null;
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117 }
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118
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119 @Override
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120 public FixedNode next() {
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121 FixedNode result = cur;
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122 if (cur == getEndNode()) {
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123 cur = null;
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124 } else {
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125 cur = ((FixedWithNextNode) cur).next();
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126 }
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df2ef5204f2b Remove AbstractBeginNode, move the framestate from AbstractBeginNode to BeginStateSplitNode.
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127 assert !(cur instanceof BeginNode);
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128 return result;
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129 }
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130
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131 @Override
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132 public void remove() {
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133 throw new UnsupportedOperationException();
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134 }
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135 }
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136
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137 public Iterable<FixedNode> getNodes() {
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138 return new Iterable<FixedNode>() {
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5e3d1a68664e applied mx eclipseformat to all Java files
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139
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140 @Override
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141 public Iterator<FixedNode> iterator() {
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142 return new NodeIterator();
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143 }
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144
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145 @Override
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146 public String toString() {
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147 StringBuilder str = new StringBuilder().append('[');
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148 for (FixedNode node : this) {
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149 str.append(node).append(", ");
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150 }
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151 if (str.length() > 1) {
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152 str.setLength(str.length() - 2);
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153 }
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154 return str.append(']').toString();
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155 }
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156 };
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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 return "B" + id;
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162 }
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163
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164 public boolean dominates(Block block) {
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165 return block.isDominatedBy(this);
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166 }
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167
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168 public boolean isDominatedBy(Block block) {
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169 if (block == this) {
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170 return true;
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171 }
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172 if (getDominator() == null) {
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173 return false;
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174 }
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175 return getDominator().isDominatedBy(block);
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176 }
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177
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178 }