1 /* 2 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.core.common.cfg; 24 25 import java.util.Collections; 26 import java.util.List; 27 28 public abstract class AbstractBlockBase<T extends AbstractBlockBase<T>> { 29 30 protected int id; 31 protected int domDepth; 32 33 protected T[] predecessors; 34 protected T[] successors; 35 36 private T dominator; 37 private List<T> dominated; 38 private int domNumber; 39 private int maxChildDomNumber; 40 41 private boolean align; 42 private int linearScanNumber; 43 44 protected AbstractBlockBase() { 45 this.id = AbstractControlFlowGraph.BLOCK_ID_INITIAL; 46 this.linearScanNumber = -1; 47 this.domNumber = -1; 48 this.maxChildDomNumber = -1; 49 } 50 51 public void setDominatorNumber(int domNumber) { 52 this.domNumber = domNumber; 53 } 54 55 public void setMaxChildDomNumber(int maxChildDomNumber) { 56 this.maxChildDomNumber = maxChildDomNumber; 57 } 58 59 public int getDominatorNumber() { 60 return domNumber; 61 } 62 63 public int getMaxChildDominatorNumber() { 64 return this.maxChildDomNumber; 65 } 66 67 public int getId() { 68 return id; 69 } 70 71 public void setId(int id) { 72 this.id = id; 73 } 74 75 public T[] getPredecessors() { 76 return predecessors; 77 } 78 79 public void setPredecessors(T[] predecessors) { 80 this.predecessors = predecessors; 81 } 82 83 public T[] getSuccessors() { 84 return successors; 85 } 86 87 public void setSuccessors(T[] successors) { 88 this.successors = successors; 89 } 90 91 public T getDominator() { 92 return dominator; 93 } 94 95 public void setDominator(T dominator) { 96 this.dominator = dominator; 97 this.domDepth = dominator.domDepth + 1; 98 } 99 100 public int getDominatorDepth() { 101 return domDepth; 102 } 103 104 public List<T> getDominated() { 105 if (dominated == null) { 106 return Collections.emptyList(); 107 } 108 return dominated; 109 } 110 111 public void setDominated(List<T> blocks) { 112 dominated = blocks; 113 } 114 115 @Override 116 public String toString() { 117 return "B" + id; 118 } 119 120 public int getPredecessorCount() { 121 return getPredecessors().length; 122 } 123 124 public int getSuccessorCount() { 125 return getSuccessors().length; 126 } 127 128 public int getLinearScanNumber() { 129 return linearScanNumber; 130 } 131 132 public void setLinearScanNumber(int linearScanNumber) { 133 this.linearScanNumber = linearScanNumber; 134 } 135 136 public boolean isAligned() { 137 return align; 138 } 139 140 public void setAlign(boolean align) { 141 this.align = align; 142 } 143 144 public abstract boolean isExceptionEntry(); 145 146 public abstract Loop<T> getLoop(); 147 148 public abstract int getLoopDepth(); 149 150 public abstract void delete(); 151 152 public abstract boolean isLoopEnd(); 153 154 public abstract boolean isLoopHeader(); 155 156 public abstract T getPostdominator(); 157 158 public abstract double probability(); 159 160 public abstract T getDominator(int distance); 161 }