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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 MCObjectWriter;
class Target;
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 mayNeedRelaxation(const MCInst &Inst,
const MCSubtargetInfo &STI) const override {
return false;
}
bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
const MCRelaxableFragment *DF,
const MCAsmLayout &Layout) const override {
llvm_unreachable("RelaxInstruction() unimplemented");
return false;
}
void relaxInstruction(const MCInst &Inst, const MCSubtargetInfo &STI,
MCInst &Res) const override {}
bool writeNopData(raw_ostream &OS, uint64_t Count) 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
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