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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/cfg/Block.java @ 19721:b503dd4e723c

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Perform full schedule for conditional elimination only in a phase where floating guards are available.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Mon, 09 Mar 2015 12:03:48 +0100
parents d9e44edfca9b
children 6b73ce815fc2
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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644dfe49c0f4 Move packages com.oracle.graal.cfg to com.oracle.graal.compiler.common.cfg.
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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 AbstractBeginNode beginNode;
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34
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35 protected FixedNode endNode;
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36
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37 protected double probability;
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38 protected Loop<Block> loop;
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39
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40 protected Block postdominator;
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6c676b3301be Create a more efficient version of commonDominator.
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41 protected Block distancedDominatorCache;
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42
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43 protected Block(AbstractBeginNode node) {
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44 this.beginNode = node;
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45 }
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46
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47 public AbstractBeginNode getBeginNode() {
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48 return beginNode;
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49 }
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50
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51 public FixedNode getEndNode() {
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52 return endNode;
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53 }
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54
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55 @Override
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56 public Loop<Block> getLoop() {
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57 return loop;
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58 }
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59
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60 public void setLoop(Loop<Block> loop) {
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61 this.loop = loop;
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62 }
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63
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64 @Override
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65 public int getLoopDepth() {
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66 return loop == null ? 0 : loop.getDepth();
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67 }
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68
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69 @Override
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70 public boolean isLoopHeader() {
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71 return getBeginNode() instanceof LoopBeginNode;
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72 }
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73
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74 @Override
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75 public boolean isLoopEnd() {
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76 return getEndNode() instanceof LoopEndNode;
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77 }
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78
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79 @Override
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80 public boolean isExceptionEntry() {
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81 Node predecessor = getBeginNode().predecessor();
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82 return predecessor != null && predecessor instanceof InvokeWithExceptionNode && getBeginNode() == ((InvokeWithExceptionNode) predecessor).exceptionEdge();
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83 }
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84
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85 public Block getFirstPredecessor() {
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86 return getPredecessors().get(0);
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87 }
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88
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89 public Block getFirstSuccessor() {
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90 return getSuccessors().get(0);
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91 }
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92
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93 public Block getEarliestPostDominated() {
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94 Block b = this;
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95 while (true) {
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96 Block dom = b.getDominator();
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97 if (dom != null && dom.getPostdominator() == b) {
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98 b = dom;
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99 } else {
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100 break;
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101 }
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102 }
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103 return b;
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104 }
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105
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106 @Override
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107 public Block getPostdominator() {
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108 return postdominator;
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109 }
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110
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111 private class NodeIterator implements Iterator<FixedNode> {
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112
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113 private FixedNode cur;
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114
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115 public NodeIterator() {
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116 cur = getBeginNode();
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117 }
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118
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119 @Override
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120 public boolean hasNext() {
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121 return cur != null;
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122 }
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123
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124 @Override
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125 public FixedNode next() {
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126 FixedNode result = cur;
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127 if (result instanceof FixedWithNextNode) {
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128 FixedWithNextNode fixedWithNextNode = (FixedWithNextNode) result;
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129 FixedNode next = fixedWithNextNode.next();
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130 if (next instanceof AbstractBeginNode) {
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131 next = null;
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132 }
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133 cur = next;
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134 } else {
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135 cur = null;
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136 }
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480bd3b1adcd Rename BeginNode => AbstractBeginNode.
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137 assert !(cur instanceof AbstractBeginNode);
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138 return result;
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139 }
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140
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141 @Override
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142 public void remove() {
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143 throw new UnsupportedOperationException();
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144 }
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145 }
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146
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147 public Iterable<FixedNode> getNodes() {
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148 return new Iterable<FixedNode>() {
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149
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150 @Override
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151 public Iterator<FixedNode> iterator() {
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152 return new NodeIterator();
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153 }
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154
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155 @Override
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156 public String toString() {
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157 StringBuilder str = new StringBuilder().append('[');
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158 for (FixedNode node : this) {
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159 str.append(node).append(", ");
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160 }
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161 if (str.length() > 1) {
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162 str.setLength(str.length() - 2);
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163 }
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164 return str.append(']').toString();
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165 }
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166 };
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167 }
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168
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169 @Override
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170 public String toString() {
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171 return "B" + id;
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172 }
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173
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174 @Override
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175 public double probability() {
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176 return probability;
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177 }
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178
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179 public void setProbability(double probability) {
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180 assert probability >= 0 && Double.isFinite(probability);
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181 this.probability = probability;
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182 }
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183
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184 @Override
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185 public Block getDominator(int distance) {
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186 Block result = this;
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d9e44edfca9b Improve common dominator calculations.
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187 for (int i = 0; i < distance; ++i) {
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188 result = result.getDominator();
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189 }
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190 return result;
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191 }
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192 }