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//===- SubtargetEmitter.h - Generate subtarget enumerations -----*- C++ -*-===//
//                     The LLVM Compiler Infrastructure
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// This tablegen backend emits subtarget enumerations.


#include "TableGenBackend.h"
#include "llvm/Target/TargetInstrItineraries.h"
#include <vector>
#include <map>
#include <string>

namespace llvm {

class SubtargetEmitter : public TableGenBackend {
  RecordKeeper &Records;
  std::string Target;
  bool HasItineraries;
  void Enumeration(raw_ostream &OS, const char *ClassName, bool isBits);
  void FeatureKeyValues(raw_ostream &OS);
  void CPUKeyValues(raw_ostream &OS);
  unsigned CollectAllItinClasses(raw_ostream &OS,
                               std::map<std::string, unsigned> &ItinClassesMap);
  void FormItineraryStageString(Record *ItinData, std::string &ItinString,
                                unsigned &NStages);
  void FormItineraryOperandCycleString(Record *ItinData, std::string &ItinString,
                                       unsigned &NOperandCycles);
  void EmitStageAndOperandCycleData(raw_ostream &OS, unsigned NItinClasses,
                     std::map<std::string, unsigned> &ItinClassesMap,
                     std::vector<std::vector<InstrItinerary> > &ProcList);
  void EmitProcessorData(raw_ostream &OS,
                       std::vector<std::vector<InstrItinerary> > &ProcList);
  void EmitProcessorLookup(raw_ostream &OS);
  void EmitData(raw_ostream &OS);
  void ParseFeaturesFunction(raw_ostream &OS);
  SubtargetEmitter(RecordKeeper &R) : Records(R), HasItineraries(false) {}

  // run - Output the subtarget enumerations, returning true on failure.
  void run(raw_ostream &o);


} // End llvm namespace