1 //===- TGParser.h - Parser for TableGen Files -------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This class represents the Parser for tablegen files.
12 //===----------------------------------------------------------------------===//
18 #include "llvm/TableGen/Error.h"
19 #include "llvm/ADT/Twine.h"
20 #include "llvm/Support/SourceMgr.h"
30 struct SubClassReference;
31 struct SubMultiClassReference;
35 std::vector<unsigned> Bits;
38 LetRecord(const std::string &N, const std::vector<unsigned> &B, Init *V,
40 : Name(N), Bits(B), Value(V), Loc(L) {
46 std::vector<std::vector<LetRecord> > LetStack;
47 std::map<std::string, MultiClass*> MultiClasses;
49 /// CurMultiClass - If we are parsing a 'multiclass' definition, this is the
51 MultiClass *CurMultiClass;
54 RecordKeeper &Records;
56 TGParser(SourceMgr &SrcMgr, RecordKeeper &records) :
57 Lex(SrcMgr), CurMultiClass(0), Records(records) {}
59 /// ParseFile - Main entrypoint for parsing a tblgen file. These parser
60 /// routines return true on error, or false on success.
63 bool Error(SMLoc L, const Twine &Msg) const {
67 bool TokError(const Twine &Msg) const {
68 return Error(Lex.getLoc(), Msg);
70 const std::vector<std::string> &getDependencies() const {
71 return Lex.getDependencies();
73 private: // Semantic analysis methods.
74 bool AddValue(Record *TheRec, SMLoc Loc, const RecordVal &RV);
75 bool SetValue(Record *TheRec, SMLoc Loc, const std::string &ValName,
76 const std::vector<unsigned> &BitList, Init *V);
77 bool AddSubClass(Record *Rec, SubClassReference &SubClass);
78 bool AddSubMultiClass(MultiClass *CurMC,
79 SubMultiClassReference &SubMultiClass);
81 private: // Parser methods.
82 bool ParseObjectList(MultiClass *MC = 0);
83 bool ParseObject(MultiClass *MC);
85 bool ParseMultiClass();
86 Record *InstantiateMulticlassDef(MultiClass &MC,
88 const std::string &DefmPrefix,
90 bool ResolveMulticlassDefArgs(MultiClass &MC,
94 const std::vector<std::string> &TArgs,
95 std::vector<Init *> &TemplateVals,
97 bool ResolveMulticlassDef(MultiClass &MC,
100 SMLoc DefmPrefixLoc);
101 bool ParseDefm(MultiClass *CurMultiClass);
102 bool ParseDef(MultiClass *CurMultiClass);
103 bool ParseTopLevelLet(MultiClass *CurMultiClass);
104 std::vector<LetRecord> ParseLetList();
106 bool ParseObjectBody(Record *CurRec);
107 bool ParseBody(Record *CurRec);
108 bool ParseBodyItem(Record *CurRec);
110 bool ParseTemplateArgList(Record *CurRec);
111 std::string ParseDeclaration(Record *CurRec, bool ParsingTemplateArgs);
113 SubClassReference ParseSubClassReference(Record *CurRec, bool isDefm);
114 SubMultiClassReference ParseSubMultiClassReference(MultiClass *CurMC);
116 Init *ParseIDValue(Record *CurRec);
117 Init *ParseIDValue(Record *CurRec, const std::string &Name, SMLoc NameLoc);
118 Init *ParseSimpleValue(Record *CurRec, RecTy *ItemType = 0);
119 Init *ParseValue(Record *CurRec, RecTy *ItemType = 0);
120 std::vector<Init*> ParseValueList(Record *CurRec, Record *ArgsRec = 0, RecTy *EltTy = 0);
121 std::vector<std::pair<llvm::Init*, std::string> > ParseDagArgList(Record *);
122 bool ParseOptionalRangeList(std::vector<unsigned> &Ranges);
123 bool ParseOptionalBitList(std::vector<unsigned> &Ranges);
124 std::vector<unsigned> ParseRangeList();
125 bool ParseRangePiece(std::vector<unsigned> &Ranges);
127 Init *ParseOperation(Record *CurRec);
128 RecTy *ParseOperatorType();
129 std::string ParseObjectName();
130 Record *ParseClassID();
131 MultiClass *ParseMultiClassID();
132 Record *ParseDefmID();
135 } // end namespace llvm