AArch64TargetMachine.h

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//==-- AArch64TargetMachine.h - Define TargetMachine for AArch64 -*- 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 AArch64 specific subclass of TargetMachine.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIB_TARGET_AARCH64_AARCH64TARGETMACHINE_H
#define LLVM_LIB_TARGET_AARCH64_AARCH64TARGETMACHINE_H

#include "AArch64InstrInfo.h"
#include "AArch64Subtarget.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/Target/TargetMachine.h"

namespace llvm {

class AArch64RegisterBankInfo;

class AArch64TargetMachine : public LLVMTargetMachine {
protected:
  std::unique_ptr<TargetLoweringObjectFile> TLOF;
  mutable StringMap<std::unique_ptr<AArch64Subtarget>> SubtargetMap;

public:
  AArch64TargetMachine(const Target &T, const Triple &TT, StringRef CPU,
                       StringRef FS, const TargetOptions &Options,
                       Optional<Reloc::Model> RM, Optional<CodeModel::Model> CM,
                       CodeGenOpt::Level OL, bool JIT, bool IsLittleEndian);

  ~AArch64TargetMachine() override;
  const AArch64Subtarget *getSubtargetImpl(const Function &F) const override;
  // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
  // subtargets are per-function entities based on the target-specific
  // attributes of each function.
  const AArch64Subtarget *getSubtargetImpl() const = delete;

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

  TargetTransformInfo getTargetTransformInfo(const Function &F) override;

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

private:
  bool isLittle;
};

// AArch64 little endian target machine.
//
class AArch64leTargetMachine : public AArch64TargetMachine {
  virtual void anchor();
public:
  AArch64leTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
                         StringRef FS, const TargetOptions &Options,
                         Optional<Reloc::Model> RM,
                         Optional<CodeModel::Model> CM, CodeGenOpt::Level OL,
                         bool JIT);
};

// AArch64 big endian target machine.
//
class AArch64beTargetMachine : public AArch64TargetMachine {
  virtual void anchor();
public:
  AArch64beTargetMachine(const Target &T, const Triple &TT, StringRef CPU,
                         StringRef FS, const TargetOptions &Options,
                         Optional<Reloc::Model> RM,
                         Optional<CodeModel::Model> CM, CodeGenOpt::Level OL,
                         bool JIT);
};

} // end namespace llvm

#endif