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"
28 struct SubClassReference;
29 struct SubMultiClassReference;
33 std::vector<unsigned> Bits;
36 LetRecord(const std::string &N, const std::vector<unsigned> &B, Init *V,
38 : Name(N), Bits(B), Value(V), Loc(L) {
44 std::vector<std::vector<LetRecord> > LetStack;
45 std::map<std::string, MultiClass*> MultiClasses;
47 /// CurMultiClass - If we are parsing a 'multiclass' definition, this is the
49 MultiClass *CurMultiClass;
51 TGParser(SourceMgr &SrcMgr) : Lex(SrcMgr), CurMultiClass(0) {}
53 /// ParseFile - Main entrypoint for parsing a tblgen file. These parser
54 /// routines return true on error, or false on success.
57 bool Error(SMLoc L, const Twine &Msg) const {
58 Lex.PrintError(L, Msg);
61 bool TokError(const Twine &Msg) const {
62 return Error(Lex.getLoc(), Msg);
64 private: // Semantic analysis methods.
65 bool AddValue(Record *TheRec, SMLoc Loc, const RecordVal &RV);
66 bool SetValue(Record *TheRec, SMLoc Loc, const std::string &ValName,
67 const std::vector<unsigned> &BitList, Init *V);
68 bool AddSubClass(Record *Rec, SubClassReference &SubClass);
69 bool AddSubMultiClass(MultiClass *CurMC,
70 SubMultiClassReference &SubMultiClass);
72 private: // Parser methods.
73 bool ParseObjectList(MultiClass *MC = 0);
74 bool ParseObject(MultiClass *MC);
76 bool ParseMultiClass();
77 bool ParseDefm(MultiClass *CurMultiClass);
78 bool ParseDef(MultiClass *CurMultiClass);
79 bool ParseTopLevelLet(MultiClass *CurMultiClass);
80 std::vector<LetRecord> ParseLetList();
82 bool ParseObjectBody(Record *CurRec);
83 bool ParseBody(Record *CurRec);
84 bool ParseBodyItem(Record *CurRec);
86 bool ParseTemplateArgList(Record *CurRec);
87 std::string ParseDeclaration(Record *CurRec, bool ParsingTemplateArgs);
89 SubClassReference ParseSubClassReference(Record *CurRec, bool isDefm);
90 SubMultiClassReference ParseSubMultiClassReference(MultiClass *CurMC);
92 Init *ParseIDValue(Record *CurRec);
93 Init *ParseIDValue(Record *CurRec, const std::string &Name, SMLoc NameLoc);
94 Init *ParseSimpleValue(Record *CurRec, RecTy *ItemType = 0);
95 Init *ParseValue(Record *CurRec, RecTy *ItemType = 0);
96 std::vector<Init*> ParseValueList(Record *CurRec, Record *ArgsRec = 0, RecTy *EltTy = 0);
97 std::vector<std::pair<llvm::Init*, std::string> > ParseDagArgList(Record *);
98 bool ParseOptionalRangeList(std::vector<unsigned> &Ranges);
99 bool ParseOptionalBitList(std::vector<unsigned> &Ranges);
100 std::vector<unsigned> ParseRangeList();
101 bool ParseRangePiece(std::vector<unsigned> &Ranges);
103 Init *ParseOperation(Record *CurRec);
104 RecTy *ParseOperatorType();
105 std::string ParseObjectName();
106 Record *ParseClassID();
107 MultiClass *ParseMultiClassID();
108 Record *ParseDefmID();
111 } // end namespace llvm