AVRAsmBackend.h

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//===-- AVRAsmBackend.h - AVR Asm Backend  --------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// \file The AVR assembly backend implementation.
//
//===----------------------------------------------------------------------===//
//
 
#ifndef LLVM_AVR_ASM_BACKEND_H
#define LLVM_AVR_ASM_BACKEND_H
 
#include "MCTargetDesc/AVRFixupKinds.h"
 
#include "llvm/ADT/Triple.h"
#include "llvm/MC/MCAsmBackend.h"
 
namespace llvm {
 
class MCAssembler;
class MCContext;
struct MCFixupKindInfo;
 
/// Utilities for manipulating generated AVR machine code.
class AVRAsmBackend : public MCAsmBackend {
public:
  AVRAsmBackend(Triple::OSType OSType)
      : MCAsmBackend(support::little), OSType(OSType) {}
 
  void adjustFixupValue(const MCFixup &Fixup, const MCValue &Target,
                        uint64_t &Value, MCContext *Ctx = nullptr) const;
 
  std::unique_ptr<MCObjectTargetWriter>
  createObjectTargetWriter() const override;
 
  void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup,
                  const MCValue &Target, MutableArrayRef<char> Data,
                  uint64_t Value, bool IsResolved,
                  const MCSubtargetInfo *STI) const override;
 
  const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
 
  unsigned getNumFixupKinds() const override {
    return AVR::NumTargetFixupKinds;
  }
 
  bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
                            const MCRelaxableFragment *DF,
                            const MCAsmLayout &Layout) const override {
    llvm_unreachable("RelaxInstruction() unimplemented");
    return false;
  }
 
  bool writeNopData(raw_ostream &OS, uint64_t Count,
                    const MCSubtargetInfo *STI) const override;
 
  bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup,
                             const MCValue &Target) override;
 
private:
  Triple::OSType OSType;
};
 
} // end namespace llvm
 
#endif // LLVM_AVR_ASM_BACKEND_H