llvm-6502/lib/Target/Mips/MipsTargetMachine.h

//===-- MipsTargetMachine.h - Define TargetMachine for Mips -----*- 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 Mips specific subclass of TargetMachine.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_MIPS_MIPSTARGETMACHINE_H
#define LLVM_LIB_TARGET_MIPS_MIPSTARGETMACHINE_H

#include "MCTargetDesc/MipsABIInfo.h"
#include "MipsSubtarget.h"
#include "llvm/CodeGen/BasicTTIImpl.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/SelectionDAGISel.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetMachine.h"

namespace llvm {
class formatted_raw_ostream;
class MipsRegisterInfo;

class MipsTargetMachine : public LLVMTargetMachine {
  bool isLittle;
  std::unique_ptr<TargetLoweringObjectFile> TLOF;
  // Selected ABI
  MipsABIInfo ABI;
  const DataLayout DL; // Calculates type size & alignment
  MipsSubtarget *Subtarget;
  MipsSubtarget DefaultSubtarget;
  MipsSubtarget NoMips16Subtarget;
  MipsSubtarget Mips16Subtarget;

  mutable StringMap<std::unique_ptr<MipsSubtarget>> SubtargetMap;

public:
  MipsTargetMachine(const Target &T, StringRef TT, StringRef CPU, StringRef FS,
                    const TargetOptions &Options, Reloc::Model RM,
                    CodeModel::Model CM, CodeGenOpt::Level OL, bool isLittle);
  ~MipsTargetMachine() override;

  TargetIRAnalysis getTargetIRAnalysis() override;

  const DataLayout *getDataLayout() const override { return &DL; }
  const MipsSubtarget *getSubtargetImpl() const override {
    if (Subtarget)
      return Subtarget;
    return &DefaultSubtarget;
  }

  const MipsSubtarget *getSubtargetImpl(const Function &F) const override;

  /// \brief Reset the subtarget for the Mips target.
  void resetSubtarget(MachineFunction *MF);

  // Pass Pipeline Configuration
  TargetPassConfig *createPassConfig(PassManagerBase &PM) override;

  TargetLoweringObjectFile *getObjFileLowering() const override {
    return TLOF.get();
  }

  bool isLittleEndian() const { return isLittle; }
  const MipsABIInfo &getABI() const { return ABI; }
};

/// MipsebTargetMachine - Mips32/64 big endian target machine.
///
class MipsebTargetMachine : public MipsTargetMachine {
  virtual void anchor();
public:
  MipsebTargetMachine(const Target &T, StringRef TT,
                      StringRef CPU, StringRef FS, const TargetOptions &Options,
                      Reloc::Model RM, CodeModel::Model CM,
                      CodeGenOpt::Level OL);
};

/// MipselTargetMachine - Mips32/64 little endian target machine.
///
class MipselTargetMachine : public MipsTargetMachine {
  virtual void anchor();
public:
  MipselTargetMachine(const Target &T, StringRef TT,
                      StringRef CPU, StringRef FS, const TargetOptions &Options,
                      Reloc::Model RM, CodeModel::Model CM,
                      CodeGenOpt::Level OL);
};

} // End llvm namespace

#endif