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annotate lib/TableGen/TGParser.h @ 146:3fc4d5c3e21e

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set tail call flag for code segment in CGCAll
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Sun, 23 Dec 2018 19:23:36 +0900
parents 803732b1fca8
children c2174574ed3a
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1 //===- TGParser.h - Parser for TableGen Files -------------------*- C++ -*-===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This class represents the Parser for tablegen files.
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11 //
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12 //===----------------------------------------------------------------------===//
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13
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14 #ifndef LLVM_LIB_TABLEGEN_TGPARSER_H
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15 #define LLVM_LIB_TABLEGEN_TGPARSER_H
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16
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17 #include "TGLexer.h"
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18 #include "llvm/ADT/Twine.h"
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19 #include "llvm/Support/SourceMgr.h"
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20 #include "llvm/TableGen/Error.h"
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21 #include "llvm/TableGen/Record.h"
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22 #include <map>
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23
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24 namespace llvm {
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25 class Record;
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26 class RecordVal;
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27 class RecordKeeper;
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28 class RecTy;
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29 class Init;
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30 struct MultiClass;
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31 struct SubClassReference;
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32 struct SubMultiClassReference;
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33
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34 struct LetRecord {
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35 StringInit *Name;
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36 std::vector<unsigned> Bits;
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37 Init *Value;
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38 SMLoc Loc;
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39 LetRecord(StringInit *N, ArrayRef<unsigned> B, Init *V, SMLoc L)
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40 : Name(N), Bits(B), Value(V), Loc(L) {
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41 }
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42 };
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43
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44 /// ForeachLoop - Record the iteration state associated with a for loop.
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45 /// This is used to instantiate items in the loop body.
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46 struct ForeachLoop {
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47 VarInit *IterVar;
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48 ListInit *ListValue;
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49
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50 ForeachLoop(VarInit *IVar, ListInit *LValue)
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51 : IterVar(IVar), ListValue(LValue) {}
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52 };
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53
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54 class TGParser {
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55 TGLexer Lex;
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56 std::vector<SmallVector<LetRecord, 4>> LetStack;
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57 std::map<std::string, std::unique_ptr<MultiClass>> MultiClasses;
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58
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59 /// Loops - Keep track of any foreach loops we are within.
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60 ///
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61 typedef std::vector<ForeachLoop> LoopVector;
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62 LoopVector Loops;
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63
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64 /// CurMultiClass - If we are parsing a 'multiclass' definition, this is the
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65 /// current value.
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66 MultiClass *CurMultiClass;
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67
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68 // Record tracker
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69 RecordKeeper &Records;
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70
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71 unsigned AnonCounter;
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72
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73 // A "named boolean" indicating how to parse identifiers. Usually
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74 // identifiers map to some existing object but in special cases
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75 // (e.g. parsing def names) no such object exists yet because we are
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76 // in the middle of creating in. For those situations, allow the
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77 // parser to ignore missing object errors.
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78 enum IDParseMode {
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79 ParseValueMode, // We are parsing a value we expect to look up.
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80 ParseNameMode, // We are parsing a name of an object that does not yet
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81 // exist.
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82 ParseForeachMode // We are parsing a foreach init.
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83 };
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84
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85 public:
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86 TGParser(SourceMgr &SrcMgr, RecordKeeper &records)
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87 : Lex(SrcMgr), CurMultiClass(nullptr), Records(records), AnonCounter(0) {}
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88
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89 /// ParseFile - Main entrypoint for parsing a tblgen file. These parser
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90 /// routines return true on error, or false on success.
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91 bool ParseFile();
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92
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93 bool Error(SMLoc L, const Twine &Msg) const {
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94 PrintError(L, Msg);
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95 return true;
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96 }
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97 bool TokError(const Twine &Msg) const {
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98 return Error(Lex.getLoc(), Msg);
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99 }
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100 const TGLexer::DependenciesMapTy &getDependencies() const {
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101 return Lex.getDependencies();
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102 }
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103
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104 private: // Semantic analysis methods.
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105 bool AddValue(Record *TheRec, SMLoc Loc, const RecordVal &RV);
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106 bool SetValue(Record *TheRec, SMLoc Loc, Init *ValName,
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107 ArrayRef<unsigned> BitList, Init *V,
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108 bool AllowSelfAssignment = false);
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109 bool AddSubClass(Record *Rec, SubClassReference &SubClass);
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110 bool AddSubMultiClass(MultiClass *CurMC,
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111 SubMultiClassReference &SubMultiClass);
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112
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113 Init *GetNewAnonymousName();
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114
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115 // IterRecord: Map an iterator name to a value.
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116 struct IterRecord {
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117 VarInit *IterVar;
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118 Init *IterValue;
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119 IterRecord(VarInit *Var, Init *Val) : IterVar(Var), IterValue(Val) {}
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120 };
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121
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122 // IterSet: The set of all iterator values at some point in the
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123 // iteration space.
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124 typedef std::vector<IterRecord> IterSet;
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125
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126 bool ProcessForeachDefs(Record *CurRec, SMLoc Loc);
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127 bool ProcessForeachDefs(Record *CurRec, SMLoc Loc, IterSet &IterVals);
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128
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129 private: // Parser methods.
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130 bool ParseObjectList(MultiClass *MC = nullptr);
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131 bool ParseObject(MultiClass *MC);
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132 bool ParseClass();
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133 bool ParseMultiClass();
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134 Record *InstantiateMulticlassDef(MultiClass &MC, Record *DefProto,
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135 Init *&DefmPrefix, SMRange DefmPrefixRange,
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136 ArrayRef<Init *> TArgs,
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137 ArrayRef<Init *> TemplateVals);
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138 bool ResolveMulticlassDefArgs(MultiClass &MC, Record *DefProto,
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139 SMLoc DefmPrefixLoc, SMLoc SubClassLoc,
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140 ArrayRef<Init *> TArgs,
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141 ArrayRef<Init *> TemplateVals, bool DeleteArgs);
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142 bool ResolveMulticlassDef(MultiClass &MC,
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143 Record *CurRec,
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144 Record *DefProto,
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145 SMLoc DefmPrefixLoc);
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146 bool ParseDefm(MultiClass *CurMultiClass);
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147 bool ParseDef(MultiClass *CurMultiClass);
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148 bool ParseForeach(MultiClass *CurMultiClass);
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149 bool ParseTopLevelLet(MultiClass *CurMultiClass);
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150 void ParseLetList(SmallVectorImpl<LetRecord> &Result);
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151
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152 bool ParseObjectBody(Record *CurRec);
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153 bool ParseBody(Record *CurRec);
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154 bool ParseBodyItem(Record *CurRec);
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155
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156 bool ParseTemplateArgList(Record *CurRec);
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157 Init *ParseDeclaration(Record *CurRec, bool ParsingTemplateArgs);
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158 VarInit *ParseForeachDeclaration(ListInit *&ForeachListValue);
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159
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160 SubClassReference ParseSubClassReference(Record *CurRec, bool isDefm);
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161 SubMultiClassReference ParseSubMultiClassReference(MultiClass *CurMC);
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162
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163 Init *ParseIDValue(Record *CurRec, StringInit *Name, SMLoc NameLoc,
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164 IDParseMode Mode = ParseValueMode);
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165 Init *ParseSimpleValue(Record *CurRec, RecTy *ItemType = nullptr,
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166 IDParseMode Mode = ParseValueMode);
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167 Init *ParseValue(Record *CurRec, RecTy *ItemType = nullptr,
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168 IDParseMode Mode = ParseValueMode);
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169 void ParseValueList(SmallVectorImpl<llvm::Init*> &Result, Record *CurRec,
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170 Record *ArgsRec = nullptr, RecTy *EltTy = nullptr);
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171 void ParseDagArgList(
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172 SmallVectorImpl<std::pair<llvm::Init*, StringInit*>> &Result,
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173 Record *CurRec);
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174 bool ParseOptionalRangeList(SmallVectorImpl<unsigned> &Ranges);
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175 bool ParseOptionalBitList(SmallVectorImpl<unsigned> &Ranges);
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176 void ParseRangeList(SmallVectorImpl<unsigned> &Result);
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177 bool ParseRangePiece(SmallVectorImpl<unsigned> &Ranges);
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178 RecTy *ParseType();
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179 Init *ParseOperation(Record *CurRec, RecTy *ItemType);
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180 RecTy *ParseOperatorType();
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181 Init *ParseObjectName(MultiClass *CurMultiClass);
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182 Record *ParseClassID();
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183 MultiClass *ParseMultiClassID();
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184 bool ApplyLetStack(Record *CurRec);
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185 };
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186
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187 } // end namespace llvm
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188
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189 #endif