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//===- TGParser.h - Parser for TableGen Files -------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class represents the Parser for tablegen files.
//
//===----------------------------------------------------------------------===//
#ifndef TGPARSER_H
#define TGPARSER_H
#include "TGLexer.h"
#include <map>
namespace llvm {
class Record;
class RecordVal;
class RecTy;
class Init;
struct MultiClass;
struct SubClassReference;
struct LetRecord {
std::string Name;
std::vector<unsigned> Bits;
Init *Value;
TGLexer::LocTy Loc;
LetRecord(const std::string &N, const std::vector<unsigned> &B, Init *V,
TGLexer::LocTy L)
: Name(N), Bits(B), Value(V), Loc(L) {
}
};
class TGParser {
TGLexer Lex;
std::vector<std::vector<LetRecord> > LetStack;
std::map<std::string, MultiClass*> MultiClasses;
/// CurMultiClass - If we are parsing a 'multiclass' definition, this is the
/// current value.
MultiClass *CurMultiClass;
public:
typedef TGLexer::LocTy LocTy;
TGParser(MemoryBuffer *StartBuf) : Lex(StartBuf), CurMultiClass(0) {}
void setIncludeDirs(const std::vector<std::string> &D){Lex.setIncludeDirs(D);}
/// ParseFile - Main entrypoint for parsing a tblgen file. These parser
/// routines return true on error, or false on success.
bool ParseFile();
bool Error(LocTy L, const std::string &Msg) const {
Lex.PrintError(L, Msg);
return true;
}
bool TokError(const std::string &Msg) const {
return Error(Lex.getLoc(), Msg);
}
private: // Semantic analysis methods.
bool AddValue(Record *TheRec, LocTy Loc, const RecordVal &RV);
bool SetValue(Record *TheRec, LocTy Loc, const std::string &ValName,
const std::vector<unsigned> &BitList, Init *V);
bool AddSubClass(Record *Rec, class SubClassReference &SubClass);
private: // Parser methods.
bool ParseObjectList();
bool ParseObject();
bool ParseClass();
bool ParseMultiClass();
bool ParseMultiClassDef(MultiClass *CurMC);
bool ParseDefm();
bool ParseTopLevelLet();
std::vector<LetRecord> ParseLetList();
Record *ParseDef(MultiClass *CurMultiClass);
bool ParseObjectBody(Record *CurRec);
bool ParseBody(Record *CurRec);
bool ParseBodyItem(Record *CurRec);
bool ParseTemplateArgList(Record *CurRec);
std::string ParseDeclaration(Record *CurRec, bool ParsingTemplateArgs);
SubClassReference ParseSubClassReference(Record *CurRec, bool isDefm);
Init *ParseIDValue(Record *CurRec);
Init *ParseIDValue(Record *CurRec, const std::string &Name, LocTy NameLoc);
Init *ParseSimpleValue(Record *CurRec);
Init *ParseValue(Record *CurRec);
std::vector<Init*> ParseValueList(Record *CurRec);
std::vector<std::pair<llvm::Init*, std::string> > ParseDagArgList(Record *);
bool ParseOptionalRangeList(std::vector<unsigned> &Ranges);
bool ParseOptionalBitList(std::vector<unsigned> &Ranges);
std::vector<unsigned> ParseRangeList();
bool ParseRangePiece(std::vector<unsigned> &Ranges);
RecTy *ParseType();
std::string ParseObjectName();
Record *ParseClassID();
Record *ParseDefmID();
};
} // end namespace llvm
#endif
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