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A double inclusion will pretty much always be an error in TableGen, so there's no point going on just to die with "def already defined" or whatnot. I'm not too thrilled about the "public: ... private: ..." to expose the DependenciesMapTy, but I really didn't see a better way to keep that type centralized. It's a smell that indicates that some refactoring is needed to make this code more loosely coupled. This should avoid all bugs of the same nature as PR15189. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174582 91177308-0d34-0410-b5e6-96231b3b80d8
192 lines
6.7 KiB
C++
192 lines
6.7 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 "llvm/TableGen/Error.h"
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#include "llvm/TableGen/Record.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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/// ForeachLoop - Record the iteration state associated with a for loop.
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/// This is used to instantiate items in the loop body.
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struct ForeachLoop {
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VarInit *IterVar;
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ListInit *ListValue;
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ForeachLoop(VarInit *IVar, ListInit *LValue)
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: IterVar(IVar), ListValue(LValue) {}
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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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/// Loops - Keep track of any foreach loops we are within.
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///
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typedef std::vector<ForeachLoop> LoopVector;
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LoopVector Loops;
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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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// A "named boolean" indicating how to parse identifiers. Usually
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// identifiers map to some existing object but in special cases
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// (e.g. parsing def names) no such object exists yet because we are
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// in the middle of creating in. For those situations, allow the
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// parser to ignore missing object errors.
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enum IDParseMode {
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ParseValueMode, // We are parsing a value we expect to look up.
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ParseNameMode, // We are parsing a name of an object that does not yet
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// exist.
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ParseForeachMode // We are parsing a foreach init.
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};
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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 TGLexer::DependenciesMapTy &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, Init *ValName,
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const std::vector<unsigned> &BitList, Init *V);
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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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return SetValue(TheRec, Loc, StringInit::get(ValName), BitList, V);
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}
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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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// IterRecord: Map an iterator name to a value.
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struct IterRecord {
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VarInit *IterVar;
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Init *IterValue;
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IterRecord(VarInit *Var, Init *Val) : IterVar(Var), IterValue(Val) {}
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};
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// IterSet: The set of all iterator values at some point in the
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// iteration space.
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typedef std::vector<IterRecord> IterSet;
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bool ProcessForeachDefs(Record *CurRec, SMLoc Loc);
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bool ProcessForeachDefs(Record *CurRec, SMLoc Loc, IterSet &IterVals);
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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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Record *InstantiateMulticlassDef(MultiClass &MC,
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Record *DefProto,
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Init *DefmPrefix,
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SMRange DefmPrefixRange);
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bool ResolveMulticlassDefArgs(MultiClass &MC,
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Record *DefProto,
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SMLoc DefmPrefixLoc,
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SMLoc SubClassLoc,
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const std::vector<Init *> &TArgs,
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std::vector<Init *> &TemplateVals,
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bool DeleteArgs);
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bool ResolveMulticlassDef(MultiClass &MC,
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Record *CurRec,
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Record *DefProto,
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SMLoc DefmPrefixLoc);
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bool ParseDefm(MultiClass *CurMultiClass);
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bool ParseDef(MultiClass *CurMultiClass);
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bool ParseForeach(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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Init *ParseDeclaration(Record *CurRec, bool ParsingTemplateArgs);
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VarInit *ParseForeachDeclaration(ListInit *&ForeachListValue);
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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, IDParseMode Mode = ParseValueMode);
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Init *ParseIDValue(Record *CurRec, const std::string &Name, SMLoc NameLoc,
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IDParseMode Mode = ParseValueMode);
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Init *ParseSimpleValue(Record *CurRec, RecTy *ItemType = 0,
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IDParseMode Mode = ParseValueMode);
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Init *ParseValue(Record *CurRec, RecTy *ItemType = 0,
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IDParseMode Mode = ParseValueMode);
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std::vector<Init*> ParseValueList(Record *CurRec, Record *ArgsRec = 0,
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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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Init *ParseObjectName(MultiClass *CurMultiClass);
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Record *ParseClassID();
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MultiClass *ParseMultiClassID();
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bool ApplyLetStack(Record *CurRec);
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};
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} // end namespace llvm
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#endif
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