0
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1 /*
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2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // Portions of code courtesy of Clifford Click
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26
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27 // Optimization - Graph Style
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28
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29
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30 class AbstractLockNode;
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31 class AddNode;
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32 class AddPNode;
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33 class AliasInfo;
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34 class AllocateArrayNode;
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35 class AllocateNode;
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36 class Block;
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37 class Block_Array;
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38 class BoolNode;
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39 class BoxLockNode;
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40 class CMoveNode;
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41 class CallDynamicJavaNode;
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42 class CallJavaNode;
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43 class CallLeafNode;
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44 class CallNode;
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45 class CallRuntimeNode;
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46 class CallStaticJavaNode;
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47 class CatchNode;
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48 class CatchProjNode;
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49 class CheckCastPPNode;
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50 class CmpNode;
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51 class CodeBuffer;
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52 class ConstraintCastNode;
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53 class ConNode;
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54 class CountedLoopNode;
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55 class CountedLoopEndNode;
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56 class FastLockNode;
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57 class FastUnlockNode;
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58 class IfNode;
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59 class InitializeNode;
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60 class JVMState;
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61 class JumpNode;
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62 class JumpProjNode;
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63 class LoadNode;
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64 class LoadStoreNode;
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65 class LockNode;
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66 class LoopNode;
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67 class MachCallDynamicJavaNode;
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68 class MachCallJavaNode;
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69 class MachCallLeafNode;
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70 class MachCallNode;
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71 class MachCallRuntimeNode;
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72 class MachCallStaticJavaNode;
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73 class MachIfNode;
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74 class MachNode;
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75 class MachNullCheckNode;
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76 class MachReturnNode;
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77 class MachSafePointNode;
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78 class MachSpillCopyNode;
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79 class MachTempNode;
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80 class Matcher;
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81 class MemBarNode;
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82 class MemNode;
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83 class MergeMemNode;
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84 class MulNode;
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85 class MultiNode;
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86 class MultiBranchNode;
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87 class NeverBranchNode;
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88 class Node;
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89 class Node_Array;
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90 class Node_List;
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91 class Node_Stack;
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92 class NullCheckNode;
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93 class OopMap;
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94 class PCTableNode;
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95 class PhaseCCP;
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96 class PhaseGVN;
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97 class PhaseIterGVN;
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98 class PhaseRegAlloc;
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99 class PhaseTransform;
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100 class PhaseValues;
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101 class PhiNode;
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102 class Pipeline;
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103 class ProjNode;
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104 class RegMask;
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105 class RegionNode;
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106 class RootNode;
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107 class SafePointNode;
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108 class StartNode;
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109 class State;
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110 class StoreNode;
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111 class SubNode;
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112 class Type;
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113 class TypeNode;
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114 class UnlockNode;
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115 class VectorSet;
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116 class IfTrueNode;
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117 class IfFalseNode;
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118 typedef void (*NFunc)(Node&,void*);
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119 extern "C" {
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120 typedef int (*C_sort_func_t)(const void *, const void *);
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121 }
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122
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123 // The type of all node counts and indexes.
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124 // It must hold at least 16 bits, but must also be fast to load and store.
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125 // This type, if less than 32 bits, could limit the number of possible nodes.
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126 // (To make this type platform-specific, move to globalDefinitions_xxx.hpp.)
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127 typedef unsigned int node_idx_t;
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128
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129
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130 #ifndef OPTO_DU_ITERATOR_ASSERT
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131 #ifdef ASSERT
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132 #define OPTO_DU_ITERATOR_ASSERT 1
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133 #else
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134 #define OPTO_DU_ITERATOR_ASSERT 0
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135 #endif
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136 #endif //OPTO_DU_ITERATOR_ASSERT
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137
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138 #if OPTO_DU_ITERATOR_ASSERT
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139 class DUIterator;
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140 class DUIterator_Fast;
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141 class DUIterator_Last;
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142 #else
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143 typedef uint DUIterator;
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144 typedef Node** DUIterator_Fast;
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145 typedef Node** DUIterator_Last;
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146 #endif
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147
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148 // Node Sentinel
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149 #define NodeSentinel (Node*)-1
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150
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151 // Unknown count frequency
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152 #define COUNT_UNKNOWN (-1.0f)
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153
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154 //------------------------------Node-------------------------------------------
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155 // Nodes define actions in the program. They create values, which have types.
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156 // They are both vertices in a directed graph and program primitives. Nodes
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157 // are labeled; the label is the "opcode", the primitive function in the lambda
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158 // calculus sense that gives meaning to the Node. Node inputs are ordered (so
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159 // that "a-b" is different from "b-a"). The inputs to a Node are the inputs to
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160 // the Node's function. These inputs also define a Type equation for the Node.
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161 // Solving these Type equations amounts to doing dataflow analysis.
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162 // Control and data are uniformly represented in the graph. Finally, Nodes
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163 // have a unique dense integer index which is used to index into side arrays
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164 // whenever I have phase-specific information.
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165
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166 class Node {
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167 // Lots of restrictions on cloning Nodes
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168 Node(const Node&); // not defined; linker error to use these
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169 Node &operator=(const Node &rhs);
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170
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171 public:
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172 friend class Compile;
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173 #if OPTO_DU_ITERATOR_ASSERT
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174 friend class DUIterator_Common;
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175 friend class DUIterator;
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176 friend class DUIterator_Fast;
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177 friend class DUIterator_Last;
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178 #endif
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179
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180 // Because Nodes come and go, I define an Arena of Node structures to pull
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181 // from. This should allow fast access to node creation & deletion. This
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182 // field is a local cache of a value defined in some "program fragment" for
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183 // which these Nodes are just a part of.
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184
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185 // New Operator that takes a Compile pointer, this will eventually
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186 // be the "new" New operator.
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187 inline void* operator new( size_t x, Compile* C) {
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188 Node* n = (Node*)C->node_arena()->Amalloc_D(x);
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189 #ifdef ASSERT
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190 n->_in = (Node**)n; // magic cookie for assertion check
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191 #endif
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192 n->_out = (Node**)C;
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193 return (void*)n;
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194 }
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195
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196 // New Operator that takes a Compile pointer, this will eventually
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197 // be the "new" New operator.
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198 inline void* operator new( size_t x, Compile* C, int y) {
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199 Node* n = (Node*)C->node_arena()->Amalloc_D(x + y*sizeof(void*));
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200 n->_in = (Node**)(((char*)n) + x);
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201 #ifdef ASSERT
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202 n->_in[y-1] = n; // magic cookie for assertion check
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203 #endif
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204 n->_out = (Node**)C;
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205 return (void*)n;
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206 }
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207
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208 // Delete is a NOP
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209 void operator delete( void *ptr ) {}
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210 // Fancy destructor; eagerly attempt to reclaim Node numberings and storage
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211 void destruct();
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212
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213 // Create a new Node. Required is the number is of inputs required for
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214 // semantic correctness.
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215 Node( uint required );
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216
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217 // Create a new Node with given input edges.
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218 // This version requires use of the "edge-count" new.
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219 // E.g. new (C,3) FooNode( C, NULL, left, right );
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220 Node( Node *n0 );
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221 Node( Node *n0, Node *n1 );
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222 Node( Node *n0, Node *n1, Node *n2 );
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223 Node( Node *n0, Node *n1, Node *n2, Node *n3 );
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224 Node( Node *n0, Node *n1, Node *n2, Node *n3, Node *n4 );
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225 Node( Node *n0, Node *n1, Node *n2, Node *n3, Node *n4, Node *n5 );
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226 Node( Node *n0, Node *n1, Node *n2, Node *n3,
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227 Node *n4, Node *n5, Node *n6 );
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228
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229 // Clone an inherited Node given only the base Node type.
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230 Node* clone() const;
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231
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232 // Clone a Node, immediately supplying one or two new edges.
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233 // The first and second arguments, if non-null, replace in(1) and in(2),
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234 // respectively.
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235 Node* clone_with_data_edge(Node* in1, Node* in2 = NULL) const {
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236 Node* nn = clone();
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237 if (in1 != NULL) nn->set_req(1, in1);
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238 if (in2 != NULL) nn->set_req(2, in2);
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239 return nn;
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240 }
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241
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242 private:
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243 // Shared setup for the above constructors.
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244 // Handles all interactions with Compile::current.
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245 // Puts initial values in all Node fields except _idx.
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246 // Returns the initial value for _idx, which cannot
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247 // be initialized by assignment.
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248 inline int Init(int req, Compile* C);
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249
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250 //----------------- input edge handling
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251 protected:
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252 friend class PhaseCFG; // Access to address of _in array elements
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253 Node **_in; // Array of use-def references to Nodes
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254 Node **_out; // Array of def-use references to Nodes
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255
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256 // Input edges are split into two catagories. Required edges are required
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257 // for semantic correctness; order is important and NULLs are allowed.
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258 // Precedence edges are used to help determine execution order and are
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259 // added, e.g., for scheduling purposes. They are unordered and not
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260 // duplicated; they have no embedded NULLs. Edges from 0 to _cnt-1
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261 // are required, from _cnt to _max-1 are precedence edges.
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262 node_idx_t _cnt; // Total number of required Node inputs.
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263
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264 node_idx_t _max; // Actual length of input array.
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265
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266 // Output edges are an unordered list of def-use edges which exactly
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267 // correspond to required input edges which point from other nodes
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268 // to this one. Thus the count of the output edges is the number of
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269 // users of this node.
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270 node_idx_t _outcnt; // Total number of Node outputs.
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271
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272 node_idx_t _outmax; // Actual length of output array.
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273
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274 // Grow the actual input array to the next larger power-of-2 bigger than len.
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275 void grow( uint len );
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276 // Grow the output array to the next larger power-of-2 bigger than len.
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277 void out_grow( uint len );
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278
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279 public:
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280 // Each Node is assigned a unique small/dense number. This number is used
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281 // to index into auxiliary arrays of data and bitvectors.
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282 // It is declared const to defend against inadvertant assignment,
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283 // since it is used by clients as a naked field.
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284 const node_idx_t _idx;
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285
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286 // Get the (read-only) number of input edges
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287 uint req() const { return _cnt; }
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288 uint len() const { return _max; }
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289 // Get the (read-only) number of output edges
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290 uint outcnt() const { return _outcnt; }
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291
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292 #if OPTO_DU_ITERATOR_ASSERT
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293 // Iterate over the out-edges of this node. Deletions are illegal.
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294 inline DUIterator outs() const;
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295 // Use this when the out array might have changed to suppress asserts.
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296 inline DUIterator& refresh_out_pos(DUIterator& i) const;
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297 // Does the node have an out at this position? (Used for iteration.)
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298 inline bool has_out(DUIterator& i) const;
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299 inline Node* out(DUIterator& i) const;
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300 // Iterate over the out-edges of this node. All changes are illegal.
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301 inline DUIterator_Fast fast_outs(DUIterator_Fast& max) const;
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302 inline Node* fast_out(DUIterator_Fast& i) const;
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303 // Iterate over the out-edges of this node, deleting one at a time.
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304 inline DUIterator_Last last_outs(DUIterator_Last& min) const;
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305 inline Node* last_out(DUIterator_Last& i) const;
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306 // The inline bodies of all these methods are after the iterator definitions.
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307 #else
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308 // Iterate over the out-edges of this node. Deletions are illegal.
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309 // This iteration uses integral indexes, to decouple from array reallocations.
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310 DUIterator outs() const { return 0; }
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311 // Use this when the out array might have changed to suppress asserts.
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312 DUIterator refresh_out_pos(DUIterator i) const { return i; }
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313
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314 // Reference to the i'th output Node. Error if out of bounds.
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315 Node* out(DUIterator i) const { assert(i < _outcnt, "oob"); return _out[i]; }
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316 // Does the node have an out at this position? (Used for iteration.)
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317 bool has_out(DUIterator i) const { return i < _outcnt; }
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318
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319 // Iterate over the out-edges of this node. All changes are illegal.
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320 // This iteration uses a pointer internal to the out array.
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321 DUIterator_Fast fast_outs(DUIterator_Fast& max) const {
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322 Node** out = _out;
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323 // Assign a limit pointer to the reference argument:
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324 max = out + (ptrdiff_t)_outcnt;
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325 // Return the base pointer:
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326 return out;
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327 }
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328 Node* fast_out(DUIterator_Fast i) const { return *i; }
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329 // Iterate over the out-edges of this node, deleting one at a time.
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330 // This iteration uses a pointer internal to the out array.
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331 DUIterator_Last last_outs(DUIterator_Last& min) const {
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332 Node** out = _out;
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333 // Assign a limit pointer to the reference argument:
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334 min = out;
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335 // Return the pointer to the start of the iteration:
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336 return out + (ptrdiff_t)_outcnt - 1;
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337 }
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338 Node* last_out(DUIterator_Last i) const { return *i; }
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339 #endif
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340
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341 // Reference to the i'th input Node. Error if out of bounds.
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342 Node* in(uint i) const { assert(i < _max,"oob"); return _in[i]; }
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343 // Reference to the i'th output Node. Error if out of bounds.
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344 // Use this accessor sparingly. We are going trying to use iterators instead.
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345 Node* raw_out(uint i) const { assert(i < _outcnt,"oob"); return _out[i]; }
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346 // Return the unique out edge.
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347 Node* unique_out() const { assert(_outcnt==1,"not unique"); return _out[0]; }
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348 // Delete out edge at position 'i' by moving last out edge to position 'i'
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349 void raw_del_out(uint i) {
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350 assert(i < _outcnt,"oob");
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351 assert(_outcnt > 0,"oob");
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352 #if OPTO_DU_ITERATOR_ASSERT
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353 // Record that a change happened here.
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354 debug_only(_last_del = _out[i]; ++_del_tick);
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355 #endif
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356 _out[i] = _out[--_outcnt];
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357 // Smash the old edge so it can't be used accidentally.
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358 debug_only(_out[_outcnt] = (Node *)(uintptr_t)0xdeadbeef);
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359 }
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360
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361 #ifdef ASSERT
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362 bool is_dead() const;
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363 #define is_not_dead(n) ((n) == NULL || !VerifyIterativeGVN || !((n)->is_dead()))
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364 #endif
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365
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366 // Set a required input edge, also updates corresponding output edge
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367 void add_req( Node *n ); // Append a NEW required input
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368 void add_req_batch( Node* n, uint m ); // Append m NEW required inputs (all n).
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369 void del_req( uint idx ); // Delete required edge & compact
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370 void ins_req( uint i, Node *n ); // Insert a NEW required input
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371 void set_req( uint i, Node *n ) {
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372 assert( is_not_dead(n), "can not use dead node");
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373 assert( i < _cnt, "oob");
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374 assert( !VerifyHashTableKeys || _hash_lock == 0,
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375 "remove node from hash table before modifying it");
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376 Node** p = &_in[i]; // cache this._in, across the del_out call
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377 if (*p != NULL) (*p)->del_out((Node *)this);
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378 (*p) = n;
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379 if (n != NULL) n->add_out((Node *)this);
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380 }
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381 // Light version of set_req() to init inputs after node creation.
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382 void init_req( uint i, Node *n ) {
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383 assert( i == 0 && this == n ||
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384 is_not_dead(n), "can not use dead node");
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385 assert( i < _cnt, "oob");
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386 assert( !VerifyHashTableKeys || _hash_lock == 0,
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387 "remove node from hash table before modifying it");
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388 assert( _in[i] == NULL, "sanity");
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389 _in[i] = n;
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390 if (n != NULL) n->add_out((Node *)this);
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391 }
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392 // Find first occurrence of n among my edges:
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393 int find_edge(Node* n);
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394 int replace_edge(Node* old, Node* neww);
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395 // NULL out all inputs to eliminate incoming Def-Use edges.
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396 // Return the number of edges between 'n' and 'this'
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397 int disconnect_inputs(Node *n);
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398
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399 // Quickly, return true if and only if I am Compile::current()->top().
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400 bool is_top() const {
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401 assert((this == (Node*) Compile::current()->top()) == (_out == NULL), "");
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402 return (_out == NULL);
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403 }
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404 // Reaffirm invariants for is_top. (Only from Compile::set_cached_top_node.)
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405 void setup_is_top();
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406
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407 // Strip away casting. (It is depth-limited.)
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408 Node* uncast() const;
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409
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410 private:
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411 static Node* uncast_helper(const Node* n);
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412
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413 // Add an output edge to the end of the list
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414 void add_out( Node *n ) {
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415 if (is_top()) return;
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416 if( _outcnt == _outmax ) out_grow(_outcnt);
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417 _out[_outcnt++] = n;
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418 }
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419 // Delete an output edge
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420 void del_out( Node *n ) {
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421 if (is_top()) return;
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422 Node** outp = &_out[_outcnt];
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423 // Find and remove n
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424 do {
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425 assert(outp > _out, "Missing Def-Use edge");
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426 } while (*--outp != n);
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427 *outp = _out[--_outcnt];
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428 // Smash the old edge so it can't be used accidentally.
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429 debug_only(_out[_outcnt] = (Node *)(uintptr_t)0xdeadbeef);
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430 // Record that a change happened here.
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431 #if OPTO_DU_ITERATOR_ASSERT
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432 debug_only(_last_del = n; ++_del_tick);
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433 #endif
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434 }
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435
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436 public:
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437 // Globally replace this node by a given new node, updating all uses.
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438 void replace_by(Node* new_node);
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439 void set_req_X( uint i, Node *n, PhaseIterGVN *igvn );
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440 // Find the one non-null required input. RegionNode only
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441 Node *nonnull_req() const;
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442 // Add or remove precedence edges
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443 void add_prec( Node *n );
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444 void rm_prec( uint i );
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445 void set_prec( uint i, Node *n ) {
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446 assert( is_not_dead(n), "can not use dead node");
|
|
447 assert( i >= _cnt, "not a precedence edge");
|
|
448 if (_in[i] != NULL) _in[i]->del_out((Node *)this);
|
|
449 _in[i] = n;
|
|
450 if (n != NULL) n->add_out((Node *)this);
|
|
451 }
|
|
452 // Set this node's index, used by cisc_version to replace current node
|
|
453 void set_idx(uint new_idx) {
|
|
454 const node_idx_t* ref = &_idx;
|
|
455 *(node_idx_t*)ref = new_idx;
|
|
456 }
|
|
457 // Swap input edge order. (Edge indexes i1 and i2 are usually 1 and 2.)
|
|
458 void swap_edges(uint i1, uint i2) {
|
|
459 debug_only(uint check_hash = (VerifyHashTableKeys && _hash_lock) ? hash() : NO_HASH);
|
|
460 // Def-Use info is unchanged
|
|
461 Node* n1 = in(i1);
|
|
462 Node* n2 = in(i2);
|
|
463 _in[i1] = n2;
|
|
464 _in[i2] = n1;
|
|
465 // If this node is in the hash table, make sure it doesn't need a rehash.
|
|
466 assert(check_hash == NO_HASH || check_hash == hash(), "edge swap must preserve hash code");
|
|
467 }
|
|
468
|
|
469 // Iterators over input Nodes for a Node X are written as:
|
|
470 // for( i = 0; i < X.req(); i++ ) ... X[i] ...
|
|
471 // NOTE: Required edges can contain embedded NULL pointers.
|
|
472
|
|
473 //----------------- Other Node Properties
|
|
474
|
|
475 // Generate class id for some ideal nodes to avoid virtual query
|
|
476 // methods is_<Node>().
|
|
477 // Class id is the set of bits corresponded to the node class and all its
|
|
478 // super classes so that queries for super classes are also valid.
|
|
479 // Subclasses of the same super class have different assigned bit
|
|
480 // (the third parameter in the macro DEFINE_CLASS_ID).
|
|
481 // Classes with deeper hierarchy are declared first.
|
|
482 // Classes with the same hierarchy depth are sorted by usage frequency.
|
|
483 //
|
|
484 // The query method masks the bits to cut off bits of subclasses
|
|
485 // and then compare the result with the class id
|
|
486 // (see the macro DEFINE_CLASS_QUERY below).
|
|
487 //
|
|
488 // Class_MachCall=30, ClassMask_MachCall=31
|
|
489 // 12 8 4 0
|
|
490 // 0 0 0 0 0 0 0 0 1 1 1 1 0
|
|
491 // | | | |
|
|
492 // | | | Bit_Mach=2
|
|
493 // | | Bit_MachReturn=4
|
|
494 // | Bit_MachSafePoint=8
|
|
495 // Bit_MachCall=16
|
|
496 //
|
|
497 // Class_CountedLoop=56, ClassMask_CountedLoop=63
|
|
498 // 12 8 4 0
|
|
499 // 0 0 0 0 0 0 0 1 1 1 0 0 0
|
|
500 // | | |
|
|
501 // | | Bit_Region=8
|
|
502 // | Bit_Loop=16
|
|
503 // Bit_CountedLoop=32
|
|
504
|
|
505 #define DEFINE_CLASS_ID(cl, supcl, subn) \
|
|
506 Bit_##cl = (Class_##supcl == 0) ? 1 << subn : (Bit_##supcl) << (1 + subn) , \
|
|
507 Class_##cl = Class_##supcl + Bit_##cl , \
|
|
508 ClassMask_##cl = ((Bit_##cl << 1) - 1) ,
|
|
509
|
|
510 // This enum is used only for C2 ideal and mach nodes with is_<node>() methods
|
|
511 // so that it's values fits into 16 bits.
|
|
512 enum NodeClasses {
|
|
513 Bit_Node = 0x0000,
|
|
514 Class_Node = 0x0000,
|
|
515 ClassMask_Node = 0xFFFF,
|
|
516
|
|
517 DEFINE_CLASS_ID(Multi, Node, 0)
|
|
518 DEFINE_CLASS_ID(SafePoint, Multi, 0)
|
|
519 DEFINE_CLASS_ID(Call, SafePoint, 0)
|
|
520 DEFINE_CLASS_ID(CallJava, Call, 0)
|
|
521 DEFINE_CLASS_ID(CallStaticJava, CallJava, 0)
|
|
522 DEFINE_CLASS_ID(CallDynamicJava, CallJava, 1)
|
|
523 DEFINE_CLASS_ID(CallRuntime, Call, 1)
|
|
524 DEFINE_CLASS_ID(CallLeaf, CallRuntime, 0)
|
|
525 DEFINE_CLASS_ID(Allocate, Call, 2)
|
|
526 DEFINE_CLASS_ID(AllocateArray, Allocate, 0)
|
|
527 DEFINE_CLASS_ID(AbstractLock, Call, 3)
|
|
528 DEFINE_CLASS_ID(Lock, AbstractLock, 0)
|
|
529 DEFINE_CLASS_ID(Unlock, AbstractLock, 1)
|
|
530 DEFINE_CLASS_ID(MultiBranch, Multi, 1)
|
|
531 DEFINE_CLASS_ID(PCTable, MultiBranch, 0)
|
|
532 DEFINE_CLASS_ID(Catch, PCTable, 0)
|
|
533 DEFINE_CLASS_ID(Jump, PCTable, 1)
|
|
534 DEFINE_CLASS_ID(If, MultiBranch, 1)
|
|
535 DEFINE_CLASS_ID(CountedLoopEnd, If, 0)
|
|
536 DEFINE_CLASS_ID(NeverBranch, MultiBranch, 2)
|
|
537 DEFINE_CLASS_ID(Start, Multi, 2)
|
|
538 DEFINE_CLASS_ID(MemBar, Multi, 3)
|
|
539 DEFINE_CLASS_ID(Initialize, MemBar, 0)
|
|
540
|
|
541 DEFINE_CLASS_ID(Mach, Node, 1)
|
|
542 DEFINE_CLASS_ID(MachReturn, Mach, 0)
|
|
543 DEFINE_CLASS_ID(MachSafePoint, MachReturn, 0)
|
|
544 DEFINE_CLASS_ID(MachCall, MachSafePoint, 0)
|
|
545 DEFINE_CLASS_ID(MachCallJava, MachCall, 0)
|
|
546 DEFINE_CLASS_ID(MachCallStaticJava, MachCallJava, 0)
|
|
547 DEFINE_CLASS_ID(MachCallDynamicJava, MachCallJava, 1)
|
|
548 DEFINE_CLASS_ID(MachCallRuntime, MachCall, 1)
|
|
549 DEFINE_CLASS_ID(MachCallLeaf, MachCallRuntime, 0)
|
|
550 DEFINE_CLASS_ID(MachSpillCopy, Mach, 1)
|
|
551 DEFINE_CLASS_ID(MachNullCheck, Mach, 2)
|
|
552 DEFINE_CLASS_ID(MachIf, Mach, 3)
|
|
553 DEFINE_CLASS_ID(MachTemp, Mach, 4)
|
|
554
|
|
555 DEFINE_CLASS_ID(Proj, Node, 2)
|
|
556 DEFINE_CLASS_ID(CatchProj, Proj, 0)
|
|
557 DEFINE_CLASS_ID(JumpProj, Proj, 1)
|
|
558 DEFINE_CLASS_ID(IfTrue, Proj, 2)
|
|
559 DEFINE_CLASS_ID(IfFalse, Proj, 3)
|
|
560
|
|
561 DEFINE_CLASS_ID(Region, Node, 3)
|
|
562 DEFINE_CLASS_ID(Loop, Region, 0)
|
|
563 DEFINE_CLASS_ID(Root, Loop, 0)
|
|
564 DEFINE_CLASS_ID(CountedLoop, Loop, 1)
|
|
565
|
|
566 DEFINE_CLASS_ID(Sub, Node, 4)
|
|
567 DEFINE_CLASS_ID(Cmp, Sub, 0)
|
|
568 DEFINE_CLASS_ID(FastLock, Cmp, 0)
|
|
569 DEFINE_CLASS_ID(FastUnlock, Cmp, 1)
|
|
570
|
|
571 DEFINE_CLASS_ID(Type, Node, 5)
|
|
572 DEFINE_CLASS_ID(Phi, Type, 0)
|
|
573 DEFINE_CLASS_ID(ConstraintCast, Type, 1)
|
|
574 DEFINE_CLASS_ID(CheckCastPP, Type, 2)
|
|
575 DEFINE_CLASS_ID(CMove, Type, 3)
|
|
576
|
|
577 DEFINE_CLASS_ID(Mem, Node, 6)
|
|
578 DEFINE_CLASS_ID(Load, Mem, 0)
|
|
579 DEFINE_CLASS_ID(Store, Mem, 1)
|
|
580 DEFINE_CLASS_ID(LoadStore, Mem, 2)
|
|
581
|
|
582 DEFINE_CLASS_ID(MergeMem, Node, 7)
|
|
583 DEFINE_CLASS_ID(Bool, Node, 8)
|
|
584 DEFINE_CLASS_ID(AddP, Node, 9)
|
|
585 DEFINE_CLASS_ID(BoxLock, Node, 10)
|
|
586 DEFINE_CLASS_ID(Add, Node, 11)
|
|
587 DEFINE_CLASS_ID(Mul, Node, 12)
|
|
588
|
|
589 _max_classes = ClassMask_Mul
|
|
590 };
|
|
591 #undef DEFINE_CLASS_ID
|
|
592
|
|
593 // Flags are sorted by usage frequency.
|
|
594 enum NodeFlags {
|
|
595 Flag_is_Copy = 0x01, // should be first bit to avoid shift
|
|
596 Flag_is_Call = Flag_is_Copy << 1,
|
|
597 Flag_rematerialize = Flag_is_Call << 1,
|
|
598 Flag_needs_anti_dependence_check = Flag_rematerialize << 1,
|
|
599 Flag_is_macro = Flag_needs_anti_dependence_check << 1,
|
|
600 Flag_is_Con = Flag_is_macro << 1,
|
|
601 Flag_is_cisc_alternate = Flag_is_Con << 1,
|
|
602 Flag_is_Branch = Flag_is_cisc_alternate << 1,
|
|
603 Flag_is_block_start = Flag_is_Branch << 1,
|
|
604 Flag_is_Goto = Flag_is_block_start << 1,
|
|
605 Flag_is_dead_loop_safe = Flag_is_Goto << 1,
|
|
606 Flag_may_be_short_branch = Flag_is_dead_loop_safe << 1,
|
|
607 Flag_is_safepoint_node = Flag_may_be_short_branch << 1,
|
|
608 Flag_is_pc_relative = Flag_is_safepoint_node << 1,
|
|
609 Flag_is_Vector = Flag_is_pc_relative << 1,
|
|
610 _max_flags = (Flag_is_Vector << 1) - 1 // allow flags combination
|
|
611 };
|
|
612
|
|
613 private:
|
|
614 jushort _class_id;
|
|
615 jushort _flags;
|
|
616
|
|
617 protected:
|
|
618 // These methods should be called from constructors only.
|
|
619 void init_class_id(jushort c) {
|
|
620 assert(c <= _max_classes, "invalid node class");
|
|
621 _class_id = c; // cast out const
|
|
622 }
|
|
623 void init_flags(jushort fl) {
|
|
624 assert(fl <= _max_flags, "invalid node flag");
|
|
625 _flags |= fl;
|
|
626 }
|
|
627 void clear_flag(jushort fl) {
|
|
628 assert(fl <= _max_flags, "invalid node flag");
|
|
629 _flags &= ~fl;
|
|
630 }
|
|
631
|
|
632 public:
|
|
633 const jushort class_id() const { return _class_id; }
|
|
634
|
|
635 const jushort flags() const { return _flags; }
|
|
636
|
|
637 // Return a dense integer opcode number
|
|
638 virtual int Opcode() const;
|
|
639
|
|
640 // Virtual inherited Node size
|
|
641 virtual uint size_of() const;
|
|
642
|
|
643 // Other interesting Node properties
|
|
644
|
|
645 // Special case: is_Call() returns true for both CallNode and MachCallNode.
|
|
646 bool is_Call() const {
|
|
647 return (_flags & Flag_is_Call) != 0;
|
|
648 }
|
|
649
|
|
650 CallNode *as_Call() const { // Only for CallNode (not for MachCallNode)
|
|
651 assert((_class_id & ClassMask_Call) == Class_Call, "invalid node class");
|
|
652 return (CallNode*)this;
|
|
653 }
|
|
654
|
|
655 #define DEFINE_CLASS_QUERY(type) \
|
|
656 bool is_##type() const { \
|
|
657 return ((_class_id & ClassMask_##type) == Class_##type); \
|
|
658 } \
|
|
659 type##Node *as_##type() const { \
|
|
660 assert(is_##type(), "invalid node class"); \
|
|
661 return (type##Node*)this; \
|
|
662 }
|
|
663
|
|
664 DEFINE_CLASS_QUERY(AbstractLock)
|
|
665 DEFINE_CLASS_QUERY(Add)
|
|
666 DEFINE_CLASS_QUERY(AddP)
|
|
667 DEFINE_CLASS_QUERY(Allocate)
|
|
668 DEFINE_CLASS_QUERY(AllocateArray)
|
|
669 DEFINE_CLASS_QUERY(Bool)
|
|
670 DEFINE_CLASS_QUERY(BoxLock)
|
|
671 DEFINE_CLASS_QUERY(CallDynamicJava)
|
|
672 DEFINE_CLASS_QUERY(CallJava)
|
|
673 DEFINE_CLASS_QUERY(CallLeaf)
|
|
674 DEFINE_CLASS_QUERY(CallRuntime)
|
|
675 DEFINE_CLASS_QUERY(CallStaticJava)
|
|
676 DEFINE_CLASS_QUERY(Catch)
|
|
677 DEFINE_CLASS_QUERY(CatchProj)
|
|
678 DEFINE_CLASS_QUERY(CheckCastPP)
|
|
679 DEFINE_CLASS_QUERY(ConstraintCast)
|
|
680 DEFINE_CLASS_QUERY(CMove)
|
|
681 DEFINE_CLASS_QUERY(Cmp)
|
|
682 DEFINE_CLASS_QUERY(CountedLoop)
|
|
683 DEFINE_CLASS_QUERY(CountedLoopEnd)
|
|
684 DEFINE_CLASS_QUERY(FastLock)
|
|
685 DEFINE_CLASS_QUERY(FastUnlock)
|
|
686 DEFINE_CLASS_QUERY(If)
|
|
687 DEFINE_CLASS_QUERY(IfFalse)
|
|
688 DEFINE_CLASS_QUERY(IfTrue)
|
|
689 DEFINE_CLASS_QUERY(Initialize)
|
|
690 DEFINE_CLASS_QUERY(Jump)
|
|
691 DEFINE_CLASS_QUERY(JumpProj)
|
|
692 DEFINE_CLASS_QUERY(Load)
|
|
693 DEFINE_CLASS_QUERY(LoadStore)
|
|
694 DEFINE_CLASS_QUERY(Lock)
|
|
695 DEFINE_CLASS_QUERY(Loop)
|
|
696 DEFINE_CLASS_QUERY(Mach)
|
|
697 DEFINE_CLASS_QUERY(MachCall)
|
|
698 DEFINE_CLASS_QUERY(MachCallDynamicJava)
|
|
699 DEFINE_CLASS_QUERY(MachCallJava)
|
|
700 DEFINE_CLASS_QUERY(MachCallLeaf)
|
|
701 DEFINE_CLASS_QUERY(MachCallRuntime)
|
|
702 DEFINE_CLASS_QUERY(MachCallStaticJava)
|
|
703 DEFINE_CLASS_QUERY(MachIf)
|
|
704 DEFINE_CLASS_QUERY(MachNullCheck)
|
|
705 DEFINE_CLASS_QUERY(MachReturn)
|
|
706 DEFINE_CLASS_QUERY(MachSafePoint)
|
|
707 DEFINE_CLASS_QUERY(MachSpillCopy)
|
|
708 DEFINE_CLASS_QUERY(MachTemp)
|
|
709 DEFINE_CLASS_QUERY(Mem)
|
|
710 DEFINE_CLASS_QUERY(MemBar)
|
|
711 DEFINE_CLASS_QUERY(MergeMem)
|
|
712 DEFINE_CLASS_QUERY(Mul)
|
|
713 DEFINE_CLASS_QUERY(Multi)
|
|
714 DEFINE_CLASS_QUERY(MultiBranch)
|
|
715 DEFINE_CLASS_QUERY(PCTable)
|
|
716 DEFINE_CLASS_QUERY(Phi)
|
|
717 DEFINE_CLASS_QUERY(Proj)
|
|
718 DEFINE_CLASS_QUERY(Region)
|
|
719 DEFINE_CLASS_QUERY(Root)
|
|
720 DEFINE_CLASS_QUERY(SafePoint)
|
|
721 DEFINE_CLASS_QUERY(Start)
|
|
722 DEFINE_CLASS_QUERY(Store)
|
|
723 DEFINE_CLASS_QUERY(Sub)
|
|
724 DEFINE_CLASS_QUERY(Type)
|
|
725 DEFINE_CLASS_QUERY(Unlock)
|
|
726
|
|
727 #undef DEFINE_CLASS_QUERY
|
|
728
|
|
729 // duplicate of is_MachSpillCopy()
|
|
730 bool is_SpillCopy () const {
|
|
731 return ((_class_id & ClassMask_MachSpillCopy) == Class_MachSpillCopy);
|
|
732 }
|
|
733
|
|
734 bool is_Con () const { return (_flags & Flag_is_Con) != 0; }
|
|
735 bool is_Goto() const { return (_flags & Flag_is_Goto) != 0; }
|
|
736 // The data node which is safe to leave in dead loop during IGVN optimization.
|
|
737 bool is_dead_loop_safe() const {
|
|
738 return is_Phi() || is_Proj() ||
|
|
739 (_flags & (Flag_is_dead_loop_safe | Flag_is_Con)) != 0;
|
|
740 }
|
|
741
|
|
742 // is_Copy() returns copied edge index (0 or 1)
|
|
743 uint is_Copy() const { return (_flags & Flag_is_Copy); }
|
|
744
|
|
745 virtual bool is_CFG() const { return false; }
|
|
746
|
|
747 // If this node is control-dependent on a test, can it be
|
|
748 // rerouted to a dominating equivalent test? This is usually
|
|
749 // true of non-CFG nodes, but can be false for operations which
|
|
750 // depend for their correct sequencing on more than one test.
|
|
751 // (In that case, hoisting to a dominating test may silently
|
|
752 // skip some other important test.)
|
|
753 virtual bool depends_only_on_test() const { assert(!is_CFG(), ""); return true; };
|
|
754
|
|
755 // defined for MachNodes that match 'If' | 'Goto' | 'CountedLoopEnd'
|
|
756 bool is_Branch() const { return (_flags & Flag_is_Branch) != 0; }
|
|
757
|
|
758 // When building basic blocks, I need to have a notion of block beginning
|
|
759 // Nodes, next block selector Nodes (block enders), and next block
|
|
760 // projections. These calls need to work on their machine equivalents. The
|
|
761 // Ideal beginning Nodes are RootNode, RegionNode and StartNode.
|
|
762 bool is_block_start() const {
|
|
763 if ( is_Region() )
|
|
764 return this == (const Node*)in(0);
|
|
765 else
|
|
766 return (_flags & Flag_is_block_start) != 0;
|
|
767 }
|
|
768
|
|
769 // The Ideal control projection Nodes are IfTrue/IfFalse, JumpProjNode, Root,
|
|
770 // Goto and Return. This call also returns the block ending Node.
|
|
771 virtual const Node *is_block_proj() const;
|
|
772
|
|
773 // The node is a "macro" node which needs to be expanded before matching
|
|
774 bool is_macro() const { return (_flags & Flag_is_macro) != 0; }
|
|
775
|
|
776 // Value is a vector of primitive values
|
|
777 bool is_Vector() const { return (_flags & Flag_is_Vector) != 0; }
|
|
778
|
|
779 //----------------- Optimization
|
|
780
|
|
781 // Get the worst-case Type output for this Node.
|
|
782 virtual const class Type *bottom_type() const;
|
|
783
|
|
784 // If we find a better type for a node, try to record it permanently.
|
|
785 // Return true if this node actually changed.
|
|
786 // Be sure to do the hash_delete game in the "rehash" variant.
|
|
787 void raise_bottom_type(const Type* new_type);
|
|
788
|
|
789 // Get the address type with which this node uses and/or defs memory,
|
|
790 // or NULL if none. The address type is conservatively wide.
|
|
791 // Returns non-null for calls, membars, loads, stores, etc.
|
|
792 // Returns TypePtr::BOTTOM if the node touches memory "broadly".
|
|
793 virtual const class TypePtr *adr_type() const { return NULL; }
|
|
794
|
|
795 // Return an existing node which computes the same function as this node.
|
|
796 // The optimistic combined algorithm requires this to return a Node which
|
|
797 // is a small number of steps away (e.g., one of my inputs).
|
|
798 virtual Node *Identity( PhaseTransform *phase );
|
|
799
|
|
800 // Return the set of values this Node can take on at runtime.
|
|
801 virtual const Type *Value( PhaseTransform *phase ) const;
|
|
802
|
|
803 // Return a node which is more "ideal" than the current node.
|
|
804 // The invariants on this call are subtle. If in doubt, read the
|
|
805 // treatise in node.cpp above the default implemention AND TEST WITH
|
|
806 // +VerifyIterativeGVN!
|
|
807 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
|
|
808
|
|
809 // Some nodes have specific Ideal subgraph transformations only if they are
|
|
810 // unique users of specific nodes. Such nodes should be put on IGVN worklist
|
|
811 // for the transformations to happen.
|
|
812 bool has_special_unique_user() const;
|
|
813
|
|
814 protected:
|
|
815 bool remove_dead_region(PhaseGVN *phase, bool can_reshape);
|
|
816 public:
|
|
817
|
|
818 // Idealize graph, using DU info. Done after constant propagation
|
|
819 virtual Node *Ideal_DU_postCCP( PhaseCCP *ccp );
|
|
820
|
|
821 // See if there is valid pipeline info
|
|
822 static const Pipeline *pipeline_class();
|
|
823 virtual const Pipeline *pipeline() const;
|
|
824
|
|
825 // Compute the latency from the def to this instruction of the ith input node
|
|
826 uint latency(uint i);
|
|
827
|
|
828 // Hash & compare functions, for pessimistic value numbering
|
|
829
|
|
830 // If the hash function returns the special sentinel value NO_HASH,
|
|
831 // the node is guaranteed never to compare equal to any other node.
|
|
832 // If we accidently generate a hash with value NO_HASH the node
|
|
833 // won't go into the table and we'll lose a little optimization.
|
|
834 enum { NO_HASH = 0 };
|
|
835 virtual uint hash() const;
|
|
836 virtual uint cmp( const Node &n ) const;
|
|
837
|
|
838 // Operation appears to be iteratively computed (such as an induction variable)
|
|
839 // It is possible for this operation to return false for a loop-varying
|
|
840 // value, if it appears (by local graph inspection) to be computed by a simple conditional.
|
|
841 bool is_iteratively_computed();
|
|
842
|
|
843 // Determine if a node is Counted loop induction variable.
|
|
844 // The method is defined in loopnode.cpp.
|
|
845 const Node* is_loop_iv() const;
|
|
846
|
|
847 // Return a node with opcode "opc" and same inputs as "this" if one can
|
|
848 // be found; Otherwise return NULL;
|
|
849 Node* find_similar(int opc);
|
|
850
|
|
851 // Return the unique control out if only one. Null if none or more than one.
|
|
852 Node* unique_ctrl_out();
|
|
853
|
|
854 //----------------- Code Generation
|
|
855
|
|
856 // Ideal register class for Matching. Zero means unmatched instruction
|
|
857 // (these are cloned instead of converted to machine nodes).
|
|
858 virtual uint ideal_reg() const;
|
|
859
|
|
860 static const uint NotAMachineReg; // must be > max. machine register
|
|
861
|
|
862 // Do we Match on this edge index or not? Generally false for Control
|
|
863 // and true for everything else. Weird for calls & returns.
|
|
864 virtual uint match_edge(uint idx) const;
|
|
865
|
|
866 // Register class output is returned in
|
|
867 virtual const RegMask &out_RegMask() const;
|
|
868 // Register class input is expected in
|
|
869 virtual const RegMask &in_RegMask(uint) const;
|
|
870 // Should we clone rather than spill this instruction?
|
|
871 bool rematerialize() const;
|
|
872
|
|
873 // Return JVM State Object if this Node carries debug info, or NULL otherwise
|
|
874 virtual JVMState* jvms() const;
|
|
875
|
|
876 // Print as assembly
|
|
877 virtual void format( PhaseRegAlloc *, outputStream* st = tty ) const;
|
|
878 // Emit bytes starting at parameter 'ptr'
|
|
879 // Bump 'ptr' by the number of output bytes
|
|
880 virtual void emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const;
|
|
881 // Size of instruction in bytes
|
|
882 virtual uint size(PhaseRegAlloc *ra_) const;
|
|
883
|
|
884 // Convenience function to extract an integer constant from a node.
|
|
885 // If it is not an integer constant (either Con, CastII, or Mach),
|
|
886 // return value_if_unknown.
|
|
887 jint find_int_con(jint value_if_unknown) const {
|
|
888 const TypeInt* t = find_int_type();
|
|
889 return (t != NULL && t->is_con()) ? t->get_con() : value_if_unknown;
|
|
890 }
|
|
891 // Return the constant, knowing it is an integer constant already
|
|
892 jint get_int() const {
|
|
893 const TypeInt* t = find_int_type();
|
|
894 guarantee(t != NULL, "must be con");
|
|
895 return t->get_con();
|
|
896 }
|
|
897 // Here's where the work is done. Can produce non-constant int types too.
|
|
898 const TypeInt* find_int_type() const;
|
|
899
|
|
900 // Same thing for long (and intptr_t, via type.hpp):
|
|
901 jlong get_long() const {
|
|
902 const TypeLong* t = find_long_type();
|
|
903 guarantee(t != NULL, "must be con");
|
|
904 return t->get_con();
|
|
905 }
|
|
906 jlong find_long_con(jint value_if_unknown) const {
|
|
907 const TypeLong* t = find_long_type();
|
|
908 return (t != NULL && t->is_con()) ? t->get_con() : value_if_unknown;
|
|
909 }
|
|
910 const TypeLong* find_long_type() const;
|
|
911
|
|
912 // These guys are called by code generated by ADLC:
|
|
913 intptr_t get_ptr() const;
|
|
914 jdouble getd() const;
|
|
915 jfloat getf() const;
|
|
916
|
|
917 // Nodes which are pinned into basic blocks
|
|
918 virtual bool pinned() const { return false; }
|
|
919
|
|
920 // Nodes which use memory without consuming it, hence need antidependences
|
|
921 // More specifically, needs_anti_dependence_check returns true iff the node
|
|
922 // (a) does a load, and (b) does not perform a store (except perhaps to a
|
|
923 // stack slot or some other unaliased location).
|
|
924 bool needs_anti_dependence_check() const;
|
|
925
|
|
926 // Return which operand this instruction may cisc-spill. In other words,
|
|
927 // return operand position that can convert from reg to memory access
|
|
928 virtual int cisc_operand() const { return AdlcVMDeps::Not_cisc_spillable; }
|
|
929 bool is_cisc_alternate() const { return (_flags & Flag_is_cisc_alternate) != 0; }
|
|
930
|
|
931 //----------------- Graph walking
|
|
932 public:
|
|
933 // Walk and apply member functions recursively.
|
|
934 // Supplied (this) pointer is root.
|
|
935 void walk(NFunc pre, NFunc post, void *env);
|
|
936 static void nop(Node &, void*); // Dummy empty function
|
|
937 static void packregion( Node &n, void* );
|
|
938 private:
|
|
939 void walk_(NFunc pre, NFunc post, void *env, VectorSet &visited);
|
|
940
|
|
941 //----------------- Printing, etc
|
|
942 public:
|
|
943 #ifndef PRODUCT
|
|
944 Node* find(int idx) const; // Search the graph for the given idx.
|
|
945 Node* find_ctrl(int idx) const; // Search control ancestors for the given idx.
|
|
946 void dump() const; // Print this node,
|
|
947 void dump(int depth) const; // Print this node, recursively to depth d
|
|
948 void dump_ctrl(int depth) const; // Print control nodes, to depth d
|
|
949 virtual void dump_req() const; // Print required-edge info
|
|
950 virtual void dump_prec() const; // Print precedence-edge info
|
|
951 virtual void dump_out() const; // Print the output edge info
|
|
952 virtual void dump_spec(outputStream *st) const {}; // Print per-node info
|
|
953 void verify_edges(Unique_Node_List &visited); // Verify bi-directional edges
|
|
954 void verify() const; // Check Def-Use info for my subgraph
|
|
955 static void verify_recur(const Node *n, int verify_depth, VectorSet &old_space, VectorSet &new_space);
|
|
956
|
|
957 // This call defines a class-unique string used to identify class instances
|
|
958 virtual const char *Name() const;
|
|
959
|
|
960 void dump_format(PhaseRegAlloc *ra) const; // debug access to MachNode::format(...)
|
|
961 // RegMask Print Functions
|
|
962 void dump_in_regmask(int idx) { in_RegMask(idx).dump(); }
|
|
963 void dump_out_regmask() { out_RegMask().dump(); }
|
|
964 static int _in_dump_cnt;
|
|
965 static bool in_dump() { return _in_dump_cnt > 0; }
|
|
966 void fast_dump() const {
|
|
967 tty->print("%4d: %-17s", _idx, Name());
|
|
968 for (uint i = 0; i < len(); i++)
|
|
969 if (in(i))
|
|
970 tty->print(" %4d", in(i)->_idx);
|
|
971 else
|
|
972 tty->print(" NULL");
|
|
973 tty->print("\n");
|
|
974 }
|
|
975 #endif
|
|
976 #ifdef ASSERT
|
|
977 void verify_construction();
|
|
978 bool verify_jvms(const JVMState* jvms) const;
|
|
979 int _debug_idx; // Unique value assigned to every node.
|
|
980 int debug_idx() const { return _debug_idx; }
|
|
981 void set_debug_idx( int debug_idx ) { _debug_idx = debug_idx; }
|
|
982
|
|
983 Node* _debug_orig; // Original version of this, if any.
|
|
984 Node* debug_orig() const { return _debug_orig; }
|
|
985 void set_debug_orig(Node* orig); // _debug_orig = orig
|
|
986
|
|
987 int _hash_lock; // Barrier to modifications of nodes in the hash table
|
|
988 void enter_hash_lock() { ++_hash_lock; assert(_hash_lock < 99, "in too many hash tables?"); }
|
|
989 void exit_hash_lock() { --_hash_lock; assert(_hash_lock >= 0, "mispaired hash locks"); }
|
|
990
|
|
991 static void init_NodeProperty();
|
|
992
|
|
993 #if OPTO_DU_ITERATOR_ASSERT
|
|
994 const Node* _last_del; // The last deleted node.
|
|
995 uint _del_tick; // Bumped when a deletion happens..
|
|
996 #endif
|
|
997 #endif
|
|
998 };
|
|
999
|
|
1000 //-----------------------------------------------------------------------------
|
|
1001 // Iterators over DU info, and associated Node functions.
|
|
1002
|
|
1003 #if OPTO_DU_ITERATOR_ASSERT
|
|
1004
|
|
1005 // Common code for assertion checking on DU iterators.
|
|
1006 class DUIterator_Common VALUE_OBJ_CLASS_SPEC {
|
|
1007 #ifdef ASSERT
|
|
1008 protected:
|
|
1009 bool _vdui; // cached value of VerifyDUIterators
|
|
1010 const Node* _node; // the node containing the _out array
|
|
1011 uint _outcnt; // cached node->_outcnt
|
|
1012 uint _del_tick; // cached node->_del_tick
|
|
1013 Node* _last; // last value produced by the iterator
|
|
1014
|
|
1015 void sample(const Node* node); // used by c'tor to set up for verifies
|
|
1016 void verify(const Node* node, bool at_end_ok = false);
|
|
1017 void verify_resync();
|
|
1018 void reset(const DUIterator_Common& that);
|
|
1019
|
|
1020 // The VDUI_ONLY macro protects code conditionalized on VerifyDUIterators
|
|
1021 #define I_VDUI_ONLY(i,x) { if ((i)._vdui) { x; } }
|
|
1022 #else
|
|
1023 #define I_VDUI_ONLY(i,x) { }
|
|
1024 #endif //ASSERT
|
|
1025 };
|
|
1026
|
|
1027 #define VDUI_ONLY(x) I_VDUI_ONLY(*this, x)
|
|
1028
|
|
1029 // Default DU iterator. Allows appends onto the out array.
|
|
1030 // Allows deletion from the out array only at the current point.
|
|
1031 // Usage:
|
|
1032 // for (DUIterator i = x->outs(); x->has_out(i); i++) {
|
|
1033 // Node* y = x->out(i);
|
|
1034 // ...
|
|
1035 // }
|
|
1036 // Compiles in product mode to a unsigned integer index, which indexes
|
|
1037 // onto a repeatedly reloaded base pointer of x->_out. The loop predicate
|
|
1038 // also reloads x->_outcnt. If you delete, you must perform "--i" just
|
|
1039 // before continuing the loop. You must delete only the last-produced
|
|
1040 // edge. You must delete only a single copy of the last-produced edge,
|
|
1041 // or else you must delete all copies at once (the first time the edge
|
|
1042 // is produced by the iterator).
|
|
1043 class DUIterator : public DUIterator_Common {
|
|
1044 friend class Node;
|
|
1045
|
|
1046 // This is the index which provides the product-mode behavior.
|
|
1047 // Whatever the product-mode version of the system does to the
|
|
1048 // DUI index is done to this index. All other fields in
|
|
1049 // this class are used only for assertion checking.
|
|
1050 uint _idx;
|
|
1051
|
|
1052 #ifdef ASSERT
|
|
1053 uint _refresh_tick; // Records the refresh activity.
|
|
1054
|
|
1055 void sample(const Node* node); // Initialize _refresh_tick etc.
|
|
1056 void verify(const Node* node, bool at_end_ok = false);
|
|
1057 void verify_increment(); // Verify an increment operation.
|
|
1058 void verify_resync(); // Verify that we can back up over a deletion.
|
|
1059 void verify_finish(); // Verify that the loop terminated properly.
|
|
1060 void refresh(); // Resample verification info.
|
|
1061 void reset(const DUIterator& that); // Resample after assignment.
|
|
1062 #endif
|
|
1063
|
|
1064 DUIterator(const Node* node, int dummy_to_avoid_conversion)
|
|
1065 { _idx = 0; debug_only(sample(node)); }
|
|
1066
|
|
1067 public:
|
|
1068 // initialize to garbage; clear _vdui to disable asserts
|
|
1069 DUIterator()
|
|
1070 { /*initialize to garbage*/ debug_only(_vdui = false); }
|
|
1071
|
|
1072 void operator++(int dummy_to_specify_postfix_op)
|
|
1073 { _idx++; VDUI_ONLY(verify_increment()); }
|
|
1074
|
|
1075 void operator--()
|
|
1076 { VDUI_ONLY(verify_resync()); --_idx; }
|
|
1077
|
|
1078 ~DUIterator()
|
|
1079 { VDUI_ONLY(verify_finish()); }
|
|
1080
|
|
1081 void operator=(const DUIterator& that)
|
|
1082 { _idx = that._idx; debug_only(reset(that)); }
|
|
1083 };
|
|
1084
|
|
1085 DUIterator Node::outs() const
|
|
1086 { return DUIterator(this, 0); }
|
|
1087 DUIterator& Node::refresh_out_pos(DUIterator& i) const
|
|
1088 { I_VDUI_ONLY(i, i.refresh()); return i; }
|
|
1089 bool Node::has_out(DUIterator& i) const
|
|
1090 { I_VDUI_ONLY(i, i.verify(this,true));return i._idx < _outcnt; }
|
|
1091 Node* Node::out(DUIterator& i) const
|
|
1092 { I_VDUI_ONLY(i, i.verify(this)); return debug_only(i._last=) _out[i._idx]; }
|
|
1093
|
|
1094
|
|
1095 // Faster DU iterator. Disallows insertions into the out array.
|
|
1096 // Allows deletion from the out array only at the current point.
|
|
1097 // Usage:
|
|
1098 // for (DUIterator_Fast imax, i = x->fast_outs(imax); i < imax; i++) {
|
|
1099 // Node* y = x->fast_out(i);
|
|
1100 // ...
|
|
1101 // }
|
|
1102 // Compiles in product mode to raw Node** pointer arithmetic, with
|
|
1103 // no reloading of pointers from the original node x. If you delete,
|
|
1104 // you must perform "--i; --imax" just before continuing the loop.
|
|
1105 // If you delete multiple copies of the same edge, you must decrement
|
|
1106 // imax, but not i, multiple times: "--i, imax -= num_edges".
|
|
1107 class DUIterator_Fast : public DUIterator_Common {
|
|
1108 friend class Node;
|
|
1109 friend class DUIterator_Last;
|
|
1110
|
|
1111 // This is the pointer which provides the product-mode behavior.
|
|
1112 // Whatever the product-mode version of the system does to the
|
|
1113 // DUI pointer is done to this pointer. All other fields in
|
|
1114 // this class are used only for assertion checking.
|
|
1115 Node** _outp;
|
|
1116
|
|
1117 #ifdef ASSERT
|
|
1118 void verify(const Node* node, bool at_end_ok = false);
|
|
1119 void verify_limit();
|
|
1120 void verify_resync();
|
|
1121 void verify_relimit(uint n);
|
|
1122 void reset(const DUIterator_Fast& that);
|
|
1123 #endif
|
|
1124
|
|
1125 // Note: offset must be signed, since -1 is sometimes passed
|
|
1126 DUIterator_Fast(const Node* node, ptrdiff_t offset)
|
|
1127 { _outp = node->_out + offset; debug_only(sample(node)); }
|
|
1128
|
|
1129 public:
|
|
1130 // initialize to garbage; clear _vdui to disable asserts
|
|
1131 DUIterator_Fast()
|
|
1132 { /*initialize to garbage*/ debug_only(_vdui = false); }
|
|
1133
|
|
1134 void operator++(int dummy_to_specify_postfix_op)
|
|
1135 { _outp++; VDUI_ONLY(verify(_node, true)); }
|
|
1136
|
|
1137 void operator--()
|
|
1138 { VDUI_ONLY(verify_resync()); --_outp; }
|
|
1139
|
|
1140 void operator-=(uint n) // applied to the limit only
|
|
1141 { _outp -= n; VDUI_ONLY(verify_relimit(n)); }
|
|
1142
|
|
1143 bool operator<(DUIterator_Fast& limit) {
|
|
1144 I_VDUI_ONLY(*this, this->verify(_node, true));
|
|
1145 I_VDUI_ONLY(limit, limit.verify_limit());
|
|
1146 return _outp < limit._outp;
|
|
1147 }
|
|
1148
|
|
1149 void operator=(const DUIterator_Fast& that)
|
|
1150 { _outp = that._outp; debug_only(reset(that)); }
|
|
1151 };
|
|
1152
|
|
1153 DUIterator_Fast Node::fast_outs(DUIterator_Fast& imax) const {
|
|
1154 // Assign a limit pointer to the reference argument:
|
|
1155 imax = DUIterator_Fast(this, (ptrdiff_t)_outcnt);
|
|
1156 // Return the base pointer:
|
|
1157 return DUIterator_Fast(this, 0);
|
|
1158 }
|
|
1159 Node* Node::fast_out(DUIterator_Fast& i) const {
|
|
1160 I_VDUI_ONLY(i, i.verify(this));
|
|
1161 return debug_only(i._last=) *i._outp;
|
|
1162 }
|
|
1163
|
|
1164
|
|
1165 // Faster DU iterator. Requires each successive edge to be removed.
|
|
1166 // Does not allow insertion of any edges.
|
|
1167 // Usage:
|
|
1168 // for (DUIterator_Last imin, i = x->last_outs(imin); i >= imin; i -= num_edges) {
|
|
1169 // Node* y = x->last_out(i);
|
|
1170 // ...
|
|
1171 // }
|
|
1172 // Compiles in product mode to raw Node** pointer arithmetic, with
|
|
1173 // no reloading of pointers from the original node x.
|
|
1174 class DUIterator_Last : private DUIterator_Fast {
|
|
1175 friend class Node;
|
|
1176
|
|
1177 #ifdef ASSERT
|
|
1178 void verify(const Node* node, bool at_end_ok = false);
|
|
1179 void verify_limit();
|
|
1180 void verify_step(uint num_edges);
|
|
1181 #endif
|
|
1182
|
|
1183 // Note: offset must be signed, since -1 is sometimes passed
|
|
1184 DUIterator_Last(const Node* node, ptrdiff_t offset)
|
|
1185 : DUIterator_Fast(node, offset) { }
|
|
1186
|
|
1187 void operator++(int dummy_to_specify_postfix_op) {} // do not use
|
|
1188 void operator<(int) {} // do not use
|
|
1189
|
|
1190 public:
|
|
1191 DUIterator_Last() { }
|
|
1192 // initialize to garbage
|
|
1193
|
|
1194 void operator--()
|
|
1195 { _outp--; VDUI_ONLY(verify_step(1)); }
|
|
1196
|
|
1197 void operator-=(uint n)
|
|
1198 { _outp -= n; VDUI_ONLY(verify_step(n)); }
|
|
1199
|
|
1200 bool operator>=(DUIterator_Last& limit) {
|
|
1201 I_VDUI_ONLY(*this, this->verify(_node, true));
|
|
1202 I_VDUI_ONLY(limit, limit.verify_limit());
|
|
1203 return _outp >= limit._outp;
|
|
1204 }
|
|
1205
|
|
1206 void operator=(const DUIterator_Last& that)
|
|
1207 { DUIterator_Fast::operator=(that); }
|
|
1208 };
|
|
1209
|
|
1210 DUIterator_Last Node::last_outs(DUIterator_Last& imin) const {
|
|
1211 // Assign a limit pointer to the reference argument:
|
|
1212 imin = DUIterator_Last(this, 0);
|
|
1213 // Return the initial pointer:
|
|
1214 return DUIterator_Last(this, (ptrdiff_t)_outcnt - 1);
|
|
1215 }
|
|
1216 Node* Node::last_out(DUIterator_Last& i) const {
|
|
1217 I_VDUI_ONLY(i, i.verify(this));
|
|
1218 return debug_only(i._last=) *i._outp;
|
|
1219 }
|
|
1220
|
|
1221 #endif //OPTO_DU_ITERATOR_ASSERT
|
|
1222
|
|
1223 #undef I_VDUI_ONLY
|
|
1224 #undef VDUI_ONLY
|
|
1225
|
|
1226
|
|
1227 //-----------------------------------------------------------------------------
|
|
1228 // Map dense integer indices to Nodes. Uses classic doubling-array trick.
|
|
1229 // Abstractly provides an infinite array of Node*'s, initialized to NULL.
|
|
1230 // Note that the constructor just zeros things, and since I use Arena
|
|
1231 // allocation I do not need a destructor to reclaim storage.
|
|
1232 class Node_Array : public ResourceObj {
|
|
1233 protected:
|
|
1234 Arena *_a; // Arena to allocate in
|
|
1235 uint _max;
|
|
1236 Node **_nodes;
|
|
1237 void grow( uint i ); // Grow array node to fit
|
|
1238 public:
|
|
1239 Node_Array(Arena *a) : _a(a), _max(OptoNodeListSize) {
|
|
1240 _nodes = NEW_ARENA_ARRAY( a, Node *, OptoNodeListSize );
|
|
1241 for( int i = 0; i < OptoNodeListSize; i++ ) {
|
|
1242 _nodes[i] = NULL;
|
|
1243 }
|
|
1244 }
|
|
1245
|
|
1246 Node_Array(Node_Array *na) : _a(na->_a), _max(na->_max), _nodes(na->_nodes) {}
|
|
1247 Node *operator[] ( uint i ) const // Lookup, or NULL for not mapped
|
|
1248 { return (i<_max) ? _nodes[i] : (Node*)NULL; }
|
|
1249 Node *at( uint i ) const { assert(i<_max,"oob"); return _nodes[i]; }
|
|
1250 Node **adr() { return _nodes; }
|
|
1251 // Extend the mapping: index i maps to Node *n.
|
|
1252 void map( uint i, Node *n ) { if( i>=_max ) grow(i); _nodes[i] = n; }
|
|
1253 void insert( uint i, Node *n );
|
|
1254 void remove( uint i ); // Remove, preserving order
|
|
1255 void sort( C_sort_func_t func);
|
|
1256 void reset( Arena *new_a ); // Zap mapping to empty; reclaim storage
|
|
1257 void clear(); // Set all entries to NULL, keep storage
|
|
1258 uint Size() const { return _max; }
|
|
1259 void dump() const;
|
|
1260 };
|
|
1261
|
|
1262 class Node_List : public Node_Array {
|
|
1263 uint _cnt;
|
|
1264 public:
|
|
1265 Node_List() : Node_Array(Thread::current()->resource_area()), _cnt(0) {}
|
|
1266 Node_List(Arena *a) : Node_Array(a), _cnt(0) {}
|
|
1267 void insert( uint i, Node *n ) { Node_Array::insert(i,n); _cnt++; }
|
|
1268 void remove( uint i ) { Node_Array::remove(i); _cnt--; }
|
|
1269 void push( Node *b ) { map(_cnt++,b); }
|
|
1270 void yank( Node *n ); // Find and remove
|
|
1271 Node *pop() { return _nodes[--_cnt]; }
|
|
1272 Node *rpop() { Node *b = _nodes[0]; _nodes[0]=_nodes[--_cnt]; return b;}
|
|
1273 void clear() { _cnt = 0; Node_Array::clear(); } // retain storage
|
|
1274 uint size() const { return _cnt; }
|
|
1275 void dump() const;
|
|
1276 };
|
|
1277
|
|
1278 //------------------------------Unique_Node_List-------------------------------
|
|
1279 class Unique_Node_List : public Node_List {
|
|
1280 VectorSet _in_worklist;
|
|
1281 uint _clock_index; // Index in list where to pop from next
|
|
1282 public:
|
|
1283 Unique_Node_List() : Node_List(), _in_worklist(Thread::current()->resource_area()), _clock_index(0) {}
|
|
1284 Unique_Node_List(Arena *a) : Node_List(a), _in_worklist(a), _clock_index(0) {}
|
|
1285
|
|
1286 void remove( Node *n );
|
|
1287 bool member( Node *n ) { return _in_worklist.test(n->_idx) != 0; }
|
|
1288 VectorSet &member_set(){ return _in_worklist; }
|
|
1289
|
|
1290 void push( Node *b ) {
|
|
1291 if( !_in_worklist.test_set(b->_idx) )
|
|
1292 Node_List::push(b);
|
|
1293 }
|
|
1294 Node *pop() {
|
|
1295 if( _clock_index >= size() ) _clock_index = 0;
|
|
1296 Node *b = at(_clock_index);
|
|
1297 map( _clock_index++, Node_List::pop());
|
|
1298 _in_worklist >>= b->_idx;
|
|
1299 return b;
|
|
1300 }
|
|
1301 Node *remove( uint i ) {
|
|
1302 Node *b = Node_List::at(i);
|
|
1303 _in_worklist >>= b->_idx;
|
|
1304 map(i,Node_List::pop());
|
|
1305 return b;
|
|
1306 }
|
|
1307 void yank( Node *n ) { _in_worklist >>= n->_idx; Node_List::yank(n); }
|
|
1308 void clear() {
|
|
1309 _in_worklist.Clear(); // Discards storage but grows automatically
|
|
1310 Node_List::clear();
|
|
1311 _clock_index = 0;
|
|
1312 }
|
|
1313
|
|
1314 // Used after parsing to remove useless nodes before Iterative GVN
|
|
1315 void remove_useless_nodes(VectorSet &useful);
|
|
1316
|
|
1317 #ifndef PRODUCT
|
|
1318 void print_set() const { _in_worklist.print(); }
|
|
1319 #endif
|
|
1320 };
|
|
1321
|
|
1322 // Inline definition of Compile::record_for_igvn must be deferred to this point.
|
|
1323 inline void Compile::record_for_igvn(Node* n) {
|
|
1324 _for_igvn->push(n);
|
|
1325 record_for_escape_analysis(n);
|
|
1326 }
|
|
1327
|
|
1328 //------------------------------Node_Stack-------------------------------------
|
|
1329 class Node_Stack {
|
|
1330 protected:
|
|
1331 struct INode {
|
|
1332 Node *node; // Processed node
|
|
1333 uint indx; // Index of next node's child
|
|
1334 };
|
|
1335 INode *_inode_top; // tos, stack grows up
|
|
1336 INode *_inode_max; // End of _inodes == _inodes + _max
|
|
1337 INode *_inodes; // Array storage for the stack
|
|
1338 Arena *_a; // Arena to allocate in
|
|
1339 void grow();
|
|
1340 public:
|
|
1341 Node_Stack(int size) {
|
|
1342 size_t max = (size > OptoNodeListSize) ? size : OptoNodeListSize;
|
|
1343 _a = Thread::current()->resource_area();
|
|
1344 _inodes = NEW_ARENA_ARRAY( _a, INode, max );
|
|
1345 _inode_max = _inodes + max;
|
|
1346 _inode_top = _inodes - 1; // stack is empty
|
|
1347 }
|
|
1348
|
|
1349 Node_Stack(Arena *a, int size) : _a(a) {
|
|
1350 size_t max = (size > OptoNodeListSize) ? size : OptoNodeListSize;
|
|
1351 _inodes = NEW_ARENA_ARRAY( _a, INode, max );
|
|
1352 _inode_max = _inodes + max;
|
|
1353 _inode_top = _inodes - 1; // stack is empty
|
|
1354 }
|
|
1355
|
|
1356 void pop() {
|
|
1357 assert(_inode_top >= _inodes, "node stack underflow");
|
|
1358 --_inode_top;
|
|
1359 }
|
|
1360 void push(Node *n, uint i) {
|
|
1361 ++_inode_top;
|
|
1362 if (_inode_top >= _inode_max) grow();
|
|
1363 INode *top = _inode_top; // optimization
|
|
1364 top->node = n;
|
|
1365 top->indx = i;
|
|
1366 }
|
|
1367 Node *node() const {
|
|
1368 return _inode_top->node;
|
|
1369 }
|
|
1370 Node* node_at(uint i) const {
|
|
1371 assert(_inodes + i <= _inode_top, "in range");
|
|
1372 return _inodes[i].node;
|
|
1373 }
|
|
1374 uint index() const {
|
|
1375 return _inode_top->indx;
|
|
1376 }
|
|
1377 void set_node(Node *n) {
|
|
1378 _inode_top->node = n;
|
|
1379 }
|
|
1380 void set_index(uint i) {
|
|
1381 _inode_top->indx = i;
|
|
1382 }
|
|
1383 uint size_max() const { return (uint)pointer_delta(_inode_max, _inodes, sizeof(INode)); } // Max size
|
|
1384 uint size() const { return (uint)pointer_delta(_inode_top, _inodes, sizeof(INode)) + 1; } // Current size
|
|
1385 bool is_nonempty() const { return (_inode_top >= _inodes); }
|
|
1386 bool is_empty() const { return (_inode_top < _inodes); }
|
|
1387 void clear() { _inode_top = _inodes - 1; } // retain storage
|
|
1388 };
|
|
1389
|
|
1390
|
|
1391 //-----------------------------Node_Notes--------------------------------------
|
|
1392 // Debugging or profiling annotations loosely and sparsely associated
|
|
1393 // with some nodes. See Compile::node_notes_at for the accessor.
|
|
1394 class Node_Notes VALUE_OBJ_CLASS_SPEC {
|
|
1395 JVMState* _jvms;
|
|
1396
|
|
1397 public:
|
|
1398 Node_Notes(JVMState* jvms = NULL) {
|
|
1399 _jvms = jvms;
|
|
1400 }
|
|
1401
|
|
1402 JVMState* jvms() { return _jvms; }
|
|
1403 void set_jvms(JVMState* x) { _jvms = x; }
|
|
1404
|
|
1405 // True if there is nothing here.
|
|
1406 bool is_clear() {
|
|
1407 return (_jvms == NULL);
|
|
1408 }
|
|
1409
|
|
1410 // Make there be nothing here.
|
|
1411 void clear() {
|
|
1412 _jvms = NULL;
|
|
1413 }
|
|
1414
|
|
1415 // Make a new, clean node notes.
|
|
1416 static Node_Notes* make(Compile* C) {
|
|
1417 Node_Notes* nn = NEW_ARENA_ARRAY(C->comp_arena(), Node_Notes, 1);
|
|
1418 nn->clear();
|
|
1419 return nn;
|
|
1420 }
|
|
1421
|
|
1422 Node_Notes* clone(Compile* C) {
|
|
1423 Node_Notes* nn = NEW_ARENA_ARRAY(C->comp_arena(), Node_Notes, 1);
|
|
1424 (*nn) = (*this);
|
|
1425 return nn;
|
|
1426 }
|
|
1427
|
|
1428 // Absorb any information from source.
|
|
1429 bool update_from(Node_Notes* source) {
|
|
1430 bool changed = false;
|
|
1431 if (source != NULL) {
|
|
1432 if (source->jvms() != NULL) {
|
|
1433 set_jvms(source->jvms());
|
|
1434 changed = true;
|
|
1435 }
|
|
1436 }
|
|
1437 return changed;
|
|
1438 }
|
|
1439 };
|
|
1440
|
|
1441 // Inlined accessors for Compile::node_nodes that require the preceding class:
|
|
1442 inline Node_Notes*
|
|
1443 Compile::locate_node_notes(GrowableArray<Node_Notes*>* arr,
|
|
1444 int idx, bool can_grow) {
|
|
1445 assert(idx >= 0, "oob");
|
|
1446 int block_idx = (idx >> _log2_node_notes_block_size);
|
|
1447 int grow_by = (block_idx - (arr == NULL? 0: arr->length()));
|
|
1448 if (grow_by >= 0) {
|
|
1449 if (!can_grow) return NULL;
|
|
1450 grow_node_notes(arr, grow_by + 1);
|
|
1451 }
|
|
1452 // (Every element of arr is a sub-array of length _node_notes_block_size.)
|
|
1453 return arr->at(block_idx) + (idx & (_node_notes_block_size-1));
|
|
1454 }
|
|
1455
|
|
1456 inline bool
|
|
1457 Compile::set_node_notes_at(int idx, Node_Notes* value) {
|
|
1458 if (value == NULL || value->is_clear())
|
|
1459 return false; // nothing to write => write nothing
|
|
1460 Node_Notes* loc = locate_node_notes(_node_note_array, idx, true);
|
|
1461 assert(loc != NULL, "");
|
|
1462 return loc->update_from(value);
|
|
1463 }
|
|
1464
|
|
1465
|
|
1466 //------------------------------TypeNode---------------------------------------
|
|
1467 // Node with a Type constant.
|
|
1468 class TypeNode : public Node {
|
|
1469 protected:
|
|
1470 virtual uint hash() const; // Check the type
|
|
1471 virtual uint cmp( const Node &n ) const;
|
|
1472 virtual uint size_of() const; // Size is bigger
|
|
1473 const Type* const _type;
|
|
1474 public:
|
|
1475 void set_type(const Type* t) {
|
|
1476 assert(t != NULL, "sanity");
|
|
1477 debug_only(uint check_hash = (VerifyHashTableKeys && _hash_lock) ? hash() : NO_HASH);
|
|
1478 *(const Type**)&_type = t; // cast away const-ness
|
|
1479 // If this node is in the hash table, make sure it doesn't need a rehash.
|
|
1480 assert(check_hash == NO_HASH || check_hash == hash(), "type change must preserve hash code");
|
|
1481 }
|
|
1482 const Type* type() const { assert(_type != NULL, "sanity"); return _type; };
|
|
1483 TypeNode( const Type *t, uint required ) : Node(required), _type(t) {
|
|
1484 init_class_id(Class_Type);
|
|
1485 }
|
|
1486 virtual const Type *Value( PhaseTransform *phase ) const;
|
|
1487 virtual const Type *bottom_type() const;
|
|
1488 virtual uint ideal_reg() const;
|
|
1489 #ifndef PRODUCT
|
|
1490 virtual void dump_spec(outputStream *st) const;
|
|
1491 #endif
|
|
1492 };
|