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