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77f8274c7d
Make all of the RecTy constructors private, and use get() factory methods instead. Return singleton instances when it makes sense. ListTy instance pointers are stored in the element RecTy instance. BitsRecTy instance pointers, one per length, are stored in a static vector. Also unique DefInit instances. A Record has a unique DefInit which has a unique RecordRecTy instance. This saves some 200k-300k RecTy allocations when parsing ARM.td. It reduces TableGen's heap usage by almost 50%. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135399 91177308-0d34-0410-b5e6-96231b3b80d8
123 lines
3.9 KiB
C++
123 lines
3.9 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 "Error.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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class RecTy;
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class 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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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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const std::vector<std::string> &getDependencies() const {
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return Lex.getDependencies();
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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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