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+//===- TGParser.h - Parser for TableGen Files -------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class represents the Parser for tablegen files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef TGPARSER_H
+#define TGPARSER_H
+
+#include "TGLexer.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/TableGen/Error.h"
+#include "llvm/TableGen/Record.h"
+#include <map>
+
+namespace llvm {
+ class Record;
+ class RecordVal;
+ class RecordKeeper;
+ class RecTy;
+ class Init;
+ struct MultiClass;
+ struct SubClassReference;
+ struct SubMultiClassReference;
+
+ struct LetRecord {
+ std::string Name;
+ std::vector<unsigned> Bits;
+ Init *Value;
+ SMLoc Loc;
+ LetRecord(const std::string &N, const std::vector<unsigned> &B, Init *V,
+ SMLoc L)
+ : Name(N), Bits(B), Value(V), Loc(L) {
+ }
+ };
+
+ /// ForeachLoop - Record the iteration state associated with a for loop.
+ /// This is used to instantiate items in the loop body.
+ struct ForeachLoop {
+ VarInit *IterVar;
+ ListInit *ListValue;
+
+ ForeachLoop(VarInit *IVar, ListInit *LValue)
+ : IterVar(IVar), ListValue(LValue) {}
+ };
+
+class TGParser {
+ TGLexer Lex;
+ std::vector<std::vector<LetRecord> > LetStack;
+ std::map<std::string, MultiClass*> MultiClasses;
+
+ /// Loops - Keep track of any foreach loops we are within.
+ ///
+ typedef std::vector<ForeachLoop> LoopVector;
+ LoopVector Loops;
+
+ /// CurMultiClass - If we are parsing a 'multiclass' definition, this is the
+ /// current value.
+ MultiClass *CurMultiClass;
+
+ // Record tracker
+ RecordKeeper &Records;
+
+ // A "named boolean" indicating how to parse identifiers. Usually
+ // identifiers map to some existing object but in special cases
+ // (e.g. parsing def names) no such object exists yet because we are
+ // in the middle of creating in. For those situations, allow the
+ // parser to ignore missing object errors.
+ enum IDParseMode {
+ ParseValueMode, // We are parsing a value we expect to look up.
+ ParseNameMode, // We are parsing a name of an object that does not yet
+ // exist.
+ ParseForeachMode // We are parsing a foreach init.
+ };
+
+public:
+ TGParser(SourceMgr &SrcMgr, RecordKeeper &records) :
+ Lex(SrcMgr), CurMultiClass(0), Records(records) {}
+
+ /// ParseFile - Main entrypoint for parsing a tblgen file. These parser
+ /// routines return true on error, or false on success.
+ bool ParseFile();
+
+ bool Error(SMLoc L, const Twine &Msg) const {
+ PrintError(L, Msg);
+ return true;
+ }
+ bool TokError(const Twine &Msg) const {
+ return Error(Lex.getLoc(), Msg);
+ }
+ const TGLexer::DependenciesMapTy &getDependencies() const {
+ return Lex.getDependencies();
+ }
+
+private: // Semantic analysis methods.
+ bool AddValue(Record *TheRec, SMLoc Loc, const RecordVal &RV);
+ bool SetValue(Record *TheRec, SMLoc Loc, Init *ValName,
+ const std::vector<unsigned> &BitList, Init *V);
+ bool SetValue(Record *TheRec, SMLoc Loc, const std::string &ValName,
+ const std::vector<unsigned> &BitList, Init *V) {
+ return SetValue(TheRec, Loc, StringInit::get(ValName), BitList, V);
+ }
+ bool AddSubClass(Record *Rec, SubClassReference &SubClass);
+ bool AddSubMultiClass(MultiClass *CurMC,
+ SubMultiClassReference &SubMultiClass);
+
+ // IterRecord: Map an iterator name to a value.
+ struct IterRecord {
+ VarInit *IterVar;
+ Init *IterValue;
+ IterRecord(VarInit *Var, Init *Val) : IterVar(Var), IterValue(Val) {}
+ };
+
+ // IterSet: The set of all iterator values at some point in the
+ // iteration space.
+ typedef std::vector<IterRecord> IterSet;
+
+ bool ProcessForeachDefs(Record *CurRec, SMLoc Loc);
+ bool ProcessForeachDefs(Record *CurRec, SMLoc Loc, IterSet &IterVals);
+
+private: // Parser methods.
+ bool ParseObjectList(MultiClass *MC = 0);
+ bool ParseObject(MultiClass *MC);
+ bool ParseClass();
+ bool ParseMultiClass();
+ Record *InstantiateMulticlassDef(MultiClass &MC,
+ Record *DefProto,
+ Init *DefmPrefix,
+ SMRange DefmPrefixRange);
+ bool ResolveMulticlassDefArgs(MultiClass &MC,
+ Record *DefProto,
+ SMLoc DefmPrefixLoc,
+ SMLoc SubClassLoc,
+ const std::vector<Init *> &TArgs,
+ std::vector<Init *> &TemplateVals,
+ bool DeleteArgs);
+ bool ResolveMulticlassDef(MultiClass &MC,
+ Record *CurRec,
+ Record *DefProto,
+ SMLoc DefmPrefixLoc);
+ bool ParseDefm(MultiClass *CurMultiClass);
+ bool ParseDef(MultiClass *CurMultiClass);
+ bool ParseForeach(MultiClass *CurMultiClass);
+ bool ParseTopLevelLet(MultiClass *CurMultiClass);
+ std::vector<LetRecord> ParseLetList();
+
+ bool ParseObjectBody(Record *CurRec);
+ bool ParseBody(Record *CurRec);
+ bool ParseBodyItem(Record *CurRec);
+
+ bool ParseTemplateArgList(Record *CurRec);
+ Init *ParseDeclaration(Record *CurRec, bool ParsingTemplateArgs);
+ VarInit *ParseForeachDeclaration(ListInit *&ForeachListValue);
+
+ SubClassReference ParseSubClassReference(Record *CurRec, bool isDefm);
+ SubMultiClassReference ParseSubMultiClassReference(MultiClass *CurMC);
+
+ Init *ParseIDValue(Record *CurRec, IDParseMode Mode = ParseValueMode);
+ Init *ParseIDValue(Record *CurRec, const std::string &Name, SMLoc NameLoc,
+ IDParseMode Mode = ParseValueMode);
+ Init *ParseSimpleValue(Record *CurRec, RecTy *ItemType = 0,
+ IDParseMode Mode = ParseValueMode);
+ Init *ParseValue(Record *CurRec, RecTy *ItemType = 0,
+ IDParseMode Mode = ParseValueMode);
+ std::vector<Init*> ParseValueList(Record *CurRec, Record *ArgsRec = 0,
+ RecTy *EltTy = 0);
+ std::vector<std::pair<llvm::Init*, std::string> > ParseDagArgList(Record *);
+ bool ParseOptionalRangeList(std::vector<unsigned> &Ranges);
+ bool ParseOptionalBitList(std::vector<unsigned> &Ranges);
+ std::vector<unsigned> ParseRangeList();
+ bool ParseRangePiece(std::vector<unsigned> &Ranges);
+ RecTy *ParseType();
+ Init *ParseOperation(Record *CurRec);
+ RecTy *ParseOperatorType();
+ Init *ParseObjectName(MultiClass *CurMultiClass);
+ Record *ParseClassID();
+ MultiClass *ParseMultiClassID();
+ bool ApplyLetStack(Record *CurRec);
+};
+
+} // end namespace llvm
+
+#endif
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