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//===-- Nios2AsmBackend.h - Nios2 Asm Backend ----------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the Nios2AsmBackend class.
//
//===----------------------------------------------------------------------===//
//
#ifndef LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2ASMBACKEND_H
#define LLVM_LIB_TARGET_NIOS2_MCTARGETDESC_NIOS2ASMBACKEND_H
#include "MCTargetDesc/Nios2FixupKinds.h"
#include "llvm/ADT/Triple.h"
#include "llvm/MC/MCAsmBackend.h"
namespace llvm {
class MCAssembler;
struct MCFixupKindInfo;
class Target;
class MCObjectWriter;
class Nios2AsmBackend : public MCAsmBackend {
Triple::OSType OSType;
public:
Nios2AsmBackend(const Target &T, Triple::OSType OSType)
: MCAsmBackend(), OSType(OSType) {}
std::unique_ptr<MCObjectWriter>
createObjectWriter(raw_pwrite_stream &OS) const override;
bool writeNopData(uint64_t Count, MCObjectWriter *OW) const override;
void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup,
const MCValue &Target, MutableArrayRef<char> Data,
uint64_t Value, bool IsResolved) const override;
Optional<MCFixupKind> getFixupKind(StringRef Name) const override;
const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
unsigned getNumFixupKinds() const override {
return Nios2::NumTargetFixupKinds;
}
/// MayNeedRelaxation - Check whether the given instruction may need
/// relaxation.
///
/// \param Inst - The instruction to test.
bool mayNeedRelaxation(const MCInst &Inst) const override { return false; }
/// fixupNeedsRelaxation - Target specific predicate for whether a given
/// fixup requires the associated instruction to be relaxed.
bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
const MCRelaxableFragment *DF,
const MCAsmLayout &Layout) const override {
// FIXME.
llvm_unreachable("RelaxInstruction() unimplemented");
return false;
}
/// RelaxInstruction - Relax the instruction in the given fragment
/// to the next wider instruction.
///
/// \param Inst - The instruction to relax, which may be the same
/// as the output.
/// \param [out] Res On return, the relaxed instruction.
void relaxInstruction(const MCInst &Inst, const MCSubtargetInfo &STI,
MCInst &Res) const override {}
}; // class Nios2AsmBackend
} // namespace llvm
#endif
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