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

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 1172e4bd9c6f
children c2174574ed3a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //===- TGLexer.h - Lexer 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 Lexer 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_TGLEXER_H
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15 #define LLVM_LIB_TABLEGEN_TGLEXER_H
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16
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17 #include "llvm/ADT/StringRef.h"
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18 #include "llvm/Support/DataTypes.h"
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19 #include "llvm/Support/SMLoc.h"
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20 #include <cassert>
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21 #include <map>
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22 #include <string>
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23
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24 namespace llvm {
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25 class SourceMgr;
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26 class SMLoc;
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27 class Twine;
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28
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29 namespace tgtok {
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30 enum TokKind {
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31 // Markers
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32 Eof, Error,
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33
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34 // Tokens with no info.
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35 minus, plus, // - +
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36 l_square, r_square, // [ ]
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37 l_brace, r_brace, // { }
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38 l_paren, r_paren, // ( )
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39 less, greater, // < >
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40 colon, semi, // : ;
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41 comma, period, // , .
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42 equal, question, // = ?
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43 paste, // #
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44
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45 // Keywords.
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46 Bit, Bits, Class, Code, Dag, Def, Foreach, Defm, Field, In, Int, Let, List,
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47 MultiClass, String,
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48
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49 // !keywords.
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50 XConcat, XADD, XAND, XOR, XSRA, XSRL, XSHL, XListConcat, XStrConcat, XCast,
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51 XSubst, XForEach, XHead, XTail, XEmpty, XIf, XEq,
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52
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53 // Integer value.
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54 IntVal,
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55
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56 // Binary constant. Note that these are sized according to the number of
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57 // bits given.
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58 BinaryIntVal,
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59
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60 // String valued tokens.
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61 Id, StrVal, VarName, CodeFragment
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62 };
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63 }
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64
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65 /// TGLexer - TableGen Lexer class.
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66 class TGLexer {
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67 SourceMgr &SrcMgr;
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68
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69 const char *CurPtr;
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70 StringRef CurBuf;
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71
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72 // Information about the current token.
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73 const char *TokStart;
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74 tgtok::TokKind CurCode;
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75 std::string CurStrVal; // This is valid for ID, STRVAL, VARNAME, CODEFRAGMENT
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76 int64_t CurIntVal; // This is valid for INTVAL.
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78 /// CurBuffer - This is the current buffer index we're lexing from as managed
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79 /// by the SourceMgr object.
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80 unsigned CurBuffer;
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81
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82 public:
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83 typedef std::map<std::string, SMLoc> DependenciesMapTy;
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84 private:
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85 /// Dependencies - This is the list of all included files.
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86 DependenciesMapTy Dependencies;
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87
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88 public:
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89 TGLexer(SourceMgr &SrcMgr);
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90
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91 tgtok::TokKind Lex() {
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92 return CurCode = LexToken();
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93 }
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94
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95 const DependenciesMapTy &getDependencies() const {
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96 return Dependencies;
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97 }
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98
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99 tgtok::TokKind getCode() const { return CurCode; }
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100
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101 const std::string &getCurStrVal() const {
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102 assert((CurCode == tgtok::Id || CurCode == tgtok::StrVal ||
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103 CurCode == tgtok::VarName || CurCode == tgtok::CodeFragment) &&
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104 "This token doesn't have a string value");
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105 return CurStrVal;
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106 }
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107 int64_t getCurIntVal() const {
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108 assert(CurCode == tgtok::IntVal && "This token isn't an integer");
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109 return CurIntVal;
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110 }
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111 std::pair<int64_t, unsigned> getCurBinaryIntVal() const {
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112 assert(CurCode == tgtok::BinaryIntVal &&
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113 "This token isn't a binary integer");
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114 return std::make_pair(CurIntVal, (CurPtr - TokStart)-2);
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115 }
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116
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117 SMLoc getLoc() const;
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118
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119 private:
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120 /// LexToken - Read the next token and return its code.
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121 tgtok::TokKind LexToken();
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122
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123 tgtok::TokKind ReturnError(const char *Loc, const Twine &Msg);
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124
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125 int getNextChar();
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126 int peekNextChar(int Index);
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127 void SkipBCPLComment();
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128 bool SkipCComment();
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129 tgtok::TokKind LexIdentifier();
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130 bool LexInclude();
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131 tgtok::TokKind LexString();
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132 tgtok::TokKind LexVarName();
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133 tgtok::TokKind LexNumber();
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134 tgtok::TokKind LexBracket();
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135 tgtok::TokKind LexExclaim();
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136 };
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137
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138 } // end namespace llvm
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139
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140 #endif