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