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/MC/MCInstrItineraries.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(raw_ostream &OS, const char *ClassName, bool isBits);
  33   unsigned FeatureKeyValues(raw_ostream &OS);
  34   unsigned CPUKeyValues(raw_ostream &OS);
  35   unsigned CollectAllItinClasses(raw_ostream &OS,
  36                                  std::map<std::string,unsigned> &ItinClassesMap,
  37                                  std::vector<Record*> &ItinClassList);
  38   void FormItineraryStageString(const std::string &Names,
  39                                 Record *ItinData, std::string &ItinString,
  40                                 unsigned &NStages);
  41   void FormItineraryOperandCycleString(Record *ItinData, std::string &ItinString,
  42                                        unsigned &NOperandCycles);
  43   void FormItineraryBypassString(const std::string &Names,
  44                                  Record *ItinData,
  45                                  std::string &ItinString, unsigned NOperandCycles);
  46   void EmitStageAndOperandCycleData(raw_ostream &OS, unsigned NItinClasses,
  47                      std::map<std::string, unsigned> &ItinClassesMap,
  48                      std::vector<Record*> &ItinClassList,
  49                      std::vector<std::vector<InstrItinerary> > &ProcList);
  50   void EmitProcessorData(raw_ostream &OS,
  51                          std::vector<Record*> &ItinClassList,
  52                          std::vector<std::vector<InstrItinerary> > &ProcList);
  53   void EmitProcessorLookup(raw_ostream &OS);
  54   void EmitData(raw_ostream &OS);
  55   void ParseFeaturesFunction(raw_ostream &OS, unsigned NumFeatures,
  56                              unsigned NumProcs);
  57
  58 public:
  59   SubtargetEmitter(RecordKeeper &R) : Records(R), HasItineraries(false) {}
  60
  61   // run - Output the subtarget enumerations, returning true on failure.
  62   void run(raw_ostream &o);
  63
  64 };
  65
  66
  67 } // End llvm namespace
  68
  69 #endif
  70
  71
  72