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external/llvm/lib/TableGen/TGParser.h
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external/llvm/lib/TableGen/TGParser.h
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//===- 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 LLVM_LIB_TABLEGEN_TGPARSER_H
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#define LLVM_LIB_TABLEGEN_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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StringInit *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(StringInit *N, ArrayRef<unsigned> B, Init *V, 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<SmallVector<LetRecord, 4>> LetStack;
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std::map<std::string, std::unique_ptr<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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unsigned AnonCounter;
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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(nullptr), Records(records), AnonCounter(0) {}
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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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ArrayRef<unsigned> BitList, Init *V,
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bool AllowSelfAssignment = false);
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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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Init *GetNewAnonymousName();
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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 = nullptr);
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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, Record *DefProto,
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Init *&DefmPrefix, SMRange DefmPrefixRange,
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ArrayRef<Init *> TArgs,
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ArrayRef<Init *> TemplateVals);
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bool ResolveMulticlassDefArgs(MultiClass &MC, Record *DefProto,
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SMLoc DefmPrefixLoc, SMLoc SubClassLoc,
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ArrayRef<Init *> TArgs,
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ArrayRef<Init *> TemplateVals, 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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void ParseLetList(SmallVectorImpl<LetRecord> &Result);
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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, StringInit *Name, SMLoc NameLoc,
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IDParseMode Mode = ParseValueMode);
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Init *ParseSimpleValue(Record *CurRec, RecTy *ItemType = nullptr,
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IDParseMode Mode = ParseValueMode);
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Init *ParseValue(Record *CurRec, RecTy *ItemType = nullptr,
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IDParseMode Mode = ParseValueMode);
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void ParseValueList(SmallVectorImpl<llvm::Init*> &Result, Record *CurRec,
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Record *ArgsRec = nullptr, RecTy *EltTy = nullptr);
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void ParseDagArgList(
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SmallVectorImpl<std::pair<llvm::Init*, StringInit*>> &Result,
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Record *CurRec);
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bool ParseOptionalRangeList(SmallVectorImpl<unsigned> &Ranges);
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bool ParseOptionalBitList(SmallVectorImpl<unsigned> &Ranges);
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void ParseRangeList(SmallVectorImpl<unsigned> &Result);
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bool ParseRangePiece(SmallVectorImpl<unsigned> &Ranges);
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RecTy *ParseType();
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Init *ParseOperation(Record *CurRec, RecTy *ItemType);
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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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