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https://github.com/c64scene-ar/llvm-6502.git
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f460165a4c
This makes the parser much easier to understand, eliminates a ton of global variables, and gives tblgen nice caret diagnostics. It is also faster, but tblgen probably doesn't care about performance. There are a couple of FIXMEs which I will take care of next. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44274 91177308-0d34-0410-b5e6-96231b3b80d8
110 lines
3.4 KiB
C++
110 lines
3.4 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 was developed by Chris Lattner and is distributed under
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// the University of Illinois Open Source 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 <map>
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namespace llvm {
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class Record;
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class RecordVal;
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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 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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TGLexer::LocTy Loc;
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LetRecord(const std::string &N, const std::vector<unsigned> &B, Init *V,
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TGLexer::LocTy 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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public:
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typedef TGLexer::LocTy LocTy;
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TGParser(MemoryBuffer *StartBuf) : Lex(StartBuf), CurMultiClass(0) {}
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void setIncludeDirs(const std::vector<std::string> &D){Lex.setIncludeDirs(D);}
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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(LocTy L, const std::string &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 std::string &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, LocTy Loc, const RecordVal &RV);
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bool SetValue(Record *TheRec, LocTy Loc, const std::string &ValName,
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const std::vector<unsigned> &BitList, Init *V);
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bool AddSubClass(Record *Rec, class SubClassReference &SubClass);
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private: // Parser methods.
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bool ParseObjectList();
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bool ParseObject();
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bool ParseClass();
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bool ParseMultiClass();
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bool ParseMultiClassDef(MultiClass *CurMC);
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bool ParseDefm();
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bool ParseTopLevelLet();
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std::vector<LetRecord> ParseLetList();
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Record *ParseDef(MultiClass *CurMultiClass);
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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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Init *ParseIDValue(Record *CurRec);
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Init *ParseIDValue(Record *CurRec, const std::string &Name, LocTy NameLoc);
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Init *ParseSimpleValue(Record *CurRec);
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Init *ParseValue(Record *CurRec);
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std::vector<Init*> ParseValueList(Record *CurRec);
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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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std::string ParseObjectName();
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Record *ParseClassID();
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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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