utils/TableGen/SubtargetEmitter.h

   1 //===- SubtargetEmitter.h - Generate subtarget enumerations -----*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This tablegen backend emits subtarget enumerations.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef SUBTARGET_EMITTER_H
  15 #define SUBTARGET_EMITTER_H
  16
  17 #include "TableGenBackend.h"
  18 #include "llvm/Target/TargetInstrItineraries.h"
  19 #include <vector>
  20 #include <map>
  21 #include <string>
  22
  23
  24 namespace llvm {
  25
  26 class SubtargetEmitter : public TableGenBackend {
  27
  28   RecordKeeper &Records;
  29   std::string Target;
  30   bool HasItineraries;
  31
  32   void Enumeration(std::ostream &OS, const char *ClassName, bool isBits);
  33   void FeatureKeyValues(std::ostream &OS);
  34   void CPUKeyValues(std::ostream &OS);
  35   unsigned CollectAllItinClasses(std::ostream &OS,
  36                                std::map<std::string, unsigned> &ItinClassesMap);
  37   void FormItineraryString(Record *ItinData, std::string &ItinString,
  38                            unsigned &NStages);
  39   void EmitStageData(std::ostream &OS, unsigned NItinClasses,
  40                      std::map<std::string, unsigned> &ItinClassesMap,
  41                      std::vector<std::vector<InstrItinerary> > &ProcList);
  42   void EmitProcessorData(std::ostream &OS,
  43                        std::vector<std::vector<InstrItinerary> > &ProcList);
  44   void EmitProcessorLookup(std::ostream &OS);
  45   void EmitData(std::ostream &OS);
  46   void ParseFeaturesFunction(std::ostream &OS);
  47
  48 public:
  49   SubtargetEmitter(RecordKeeper &R) : Records(R), HasItineraries(false) {}
  50
  51   // run - Output the subtarget enumerations, returning true on failure.
  52   void run(std::ostream &o);
  53
  54 };
  55
  56
  57 } // End llvm namespace
  58
  59 #endif
  60
  61
  62