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/ADT/Twine.h"
19 #include "llvm/Support/SourceMgr.h"
29 struct SubClassReference;
30 struct SubMultiClassReference;
34 std::vector<unsigned> Bits;
37 LetRecord(const std::string &N, const std::vector<unsigned> &B, Init *V,
39 : Name(N), Bits(B), Value(V), Loc(L) {
45 std::vector<std::vector<LetRecord> > LetStack;
46 std::map<std::string, MultiClass*> MultiClasses;
48 /// CurMultiClass - If we are parsing a 'multiclass' definition, this is the
50 MultiClass *CurMultiClass;
53 RecordKeeper& Records;
55 TGParser(SourceMgr &SrcMgr, RecordKeeper& records) :
56 Lex(SrcMgr), CurMultiClass(0), Records(records) {}
58 /// ParseFile - Main entrypoint for parsing a tblgen file. These parser
59 /// routines return true on error, or false on success.
62 bool Error(SMLoc L, const Twine &Msg) const {
63 Lex.PrintError(L, Msg);
66 bool TokError(const Twine &Msg) const {
67 return Error(Lex.getLoc(), Msg);
69 private: // Semantic analysis methods.
70 bool AddValue(Record *TheRec, SMLoc Loc, const RecordVal &RV);
71 bool SetValue(Record *TheRec, SMLoc Loc, const std::string &ValName,
72 const std::vector<unsigned> &BitList, Init *V);
73 bool AddSubClass(Record *Rec, SubClassReference &SubClass);
74 bool AddSubMultiClass(MultiClass *CurMC,
75 SubMultiClassReference &SubMultiClass);
77 private: // Parser methods.
78 bool ParseObjectList(MultiClass *MC = 0);
79 bool ParseObject(MultiClass *MC);
81 bool ParseMultiClass();
82 bool ParseDefm(MultiClass *CurMultiClass);
83 bool ParseDef(MultiClass *CurMultiClass);
84 bool ParseTopLevelLet(MultiClass *CurMultiClass);
85 std::vector<LetRecord> ParseLetList();
87 bool ParseObjectBody(Record *CurRec);
88 bool ParseBody(Record *CurRec);
89 bool ParseBodyItem(Record *CurRec);
91 bool ParseTemplateArgList(Record *CurRec);
92 std::string ParseDeclaration(Record *CurRec, bool ParsingTemplateArgs);
94 SubClassReference ParseSubClassReference(Record *CurRec, bool isDefm);
95 SubMultiClassReference ParseSubMultiClassReference(MultiClass *CurMC);
97 Init *ParseIDValue(Record *CurRec);
98 Init *ParseIDValue(Record *CurRec, const std::string &Name, SMLoc NameLoc);
99 Init *ParseSimpleValue(Record *CurRec, RecTy *ItemType = 0);
100 Init *ParseValue(Record *CurRec, RecTy *ItemType = 0);
101 std::vector<Init*> ParseValueList(Record *CurRec, Record *ArgsRec = 0, RecTy *EltTy = 0);
102 std::vector<std::pair<llvm::Init*, std::string> > ParseDagArgList(Record *);
103 bool ParseOptionalRangeList(std::vector<unsigned> &Ranges);
104 bool ParseOptionalBitList(std::vector<unsigned> &Ranges);
105 std::vector<unsigned> ParseRangeList();
106 bool ParseRangePiece(std::vector<unsigned> &Ranges);
108 Init *ParseOperation(Record *CurRec);
109 RecTy *ParseOperatorType();
110 std::string ParseObjectName();
111 Record *ParseClassID();
112 MultiClass *ParseMultiClassID();
113 Record *ParseDefmID();
116 } // end namespace llvm