text: //===-- Nios2Subtarget.h - Define Subtarget for the Nios2 -------*- C++ -*-===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is distributed under the University of Illinois Open Source
  // License. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  //
  // This file declares the Nios2 specific subclass of TargetSubtargetInfo.
  //
  //===----------------------------------------------------------------------===//
  
  #ifndef LLVM_LIB_TARGET_NIOS2_NIOS2SUBTARGET_H
  #define LLVM_LIB_TARGET_NIOS2_NIOS2SUBTARGET_H
  
  #include "Nios2FrameLowering.h"
  #include "Nios2ISelLowering.h"
  #include "Nios2InstrInfo.h"
  #include "llvm/CodeGen/SelectionDAGTargetInfo.h"
  #include "llvm/CodeGen/TargetFrameLowering.h"
  #include "llvm/CodeGen/TargetSubtargetInfo.h"
  
  #define GET_SUBTARGETINFO_HEADER
  #include "Nios2GenSubtargetInfo.inc"
  
  namespace llvm {
  class StringRef;
  
  class Nios2TargetMachine;
  
  class Nios2Subtarget : public Nios2GenSubtargetInfo {
    virtual void anchor();
  
  public:
    // Nios2 R2 features
    // Bit manipulation instructions extension
    bool HasBMX;
    // Code Density instructions extension
    bool HasCDX;
    // Multi-Processor instructions extension
    bool HasMPX;
    // New mandatory instructions
    bool HasR2Mandatory;
  
  protected:
    enum Nios2ArchEnum {
      // Nios2 R1 ISA
      Nios2r1,
      // Nios2 R2 ISA
      Nios2r2
    };
  
    // Nios2 architecture version
    Nios2ArchEnum Nios2ArchVersion;
  
    Triple TargetTriple;
  
    Nios2InstrInfo InstrInfo;
    Nios2TargetLowering TLInfo;
    SelectionDAGTargetInfo TSInfo;
    Nios2FrameLowering FrameLowering;
  
  public:
    /// This constructor initializes the data members to match that
    /// of the specified triple.
    Nios2Subtarget(const Triple &TT, const std::string &CPU,
                   const std::string &FS, const TargetMachine &TM);
  
    /// ParseSubtargetFeatures - Parses features string setting specified
    /// subtarget options.  Definition of function is auto generated by tblgen.
    void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
  
    bool hasNios2r1() const { return Nios2ArchVersion >= Nios2r1; }
    bool isNios2r1() const { return Nios2ArchVersion == Nios2r1; }
    bool hasNios2r2() const { return Nios2ArchVersion >= Nios2r2; }
    bool isNios2r2() const { return Nios2ArchVersion == Nios2r2; }
  
    Nios2Subtarget &initializeSubtargetDependencies(StringRef CPU, StringRef FS);
  
    const Nios2InstrInfo *getInstrInfo() const override { return &InstrInfo; }
    const TargetFrameLowering *getFrameLowering() const override {
      return &FrameLowering;
    }
    const Nios2RegisterInfo *getRegisterInfo() const override {
      return &InstrInfo.getRegisterInfo();
    }
    const Nios2TargetLowering *getTargetLowering() const override {
      return &TLInfo;
    }
    const SelectionDAGTargetInfo *getSelectionDAGInfo() const override {
      return &TSInfo;
    }
  };
  } // namespace llvm
  
  #endif
  