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//===-- LoongArchAsmBackend.h - LoongArch Assembler Backend ---*- C++ -*---===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file defines the LoongArchAsmBackend class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H
#define LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H
#include "MCTargetDesc/LoongArchBaseInfo.h"
#include "MCTargetDesc/LoongArchFixupKinds.h"
#include "MCTargetDesc/LoongArchMCTargetDesc.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCFixupKindInfo.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSubtargetInfo.h"
namespace llvm {
class LoongArchAsmBackend : public MCAsmBackend {
const MCSubtargetInfo &STI;
uint8_t OSABI;
bool Is64Bit;
const MCTargetOptions &TargetOptions;
DenseMap<MCSection *, const MCSymbolRefExpr *> SecToAlignSym;
public:
LoongArchAsmBackend(const MCSubtargetInfo &STI, uint8_t OSABI, bool Is64Bit,
const MCTargetOptions &Options)
: MCAsmBackend(llvm::endianness::little,
LoongArch::fixup_loongarch_relax),
STI(STI), OSABI(OSABI), Is64Bit(Is64Bit), TargetOptions(Options) {}
~LoongArchAsmBackend() override {}
bool handleAddSubRelocations(const MCAssembler &Asm, const MCFragment &F,
const MCFixup &Fixup, const MCValue &Target,
uint64_t &FixedValue) 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;
// Return Size with extra Nop Bytes for alignment directive in code section.
bool shouldInsertExtraNopBytesForCodeAlign(const MCAlignFragment &AF,
unsigned &Size) override;
// Insert target specific fixup type for alignment directive in code section.
bool shouldInsertFixupForCodeAlign(MCAssembler &Asm,
MCAlignFragment &AF) override;
bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup,
const MCValue &Target,
const MCSubtargetInfo *STI) override;
unsigned getNumFixupKinds() const override {
return LoongArch::NumTargetFixupKinds;
}
std::optional<MCFixupKind> getFixupKind(StringRef Name) const override;
const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
void relaxInstruction(MCInst &Inst,
const MCSubtargetInfo &STI) const override {}
std::pair<bool, bool> relaxLEB128(const MCAssembler &Asm, MCLEBFragment &LF,
int64_t &Value) const override;
bool relaxDwarfLineAddr(const MCAssembler &Asm, MCDwarfLineAddrFragment &DF,
bool &WasRelaxed) const override;
bool relaxDwarfCFA(const MCAssembler &Asm, MCDwarfCallFrameFragment &DF,
bool &WasRelaxed) const override;
bool writeNopData(raw_ostream &OS, uint64_t Count,
const MCSubtargetInfo *STI) const override;
std::unique_ptr<MCObjectTargetWriter>
createObjectTargetWriter() const override;
const MCTargetOptions &getTargetOptions() const { return TargetOptions; }
DenseMap<MCSection *, const MCSymbolRefExpr *> &getSecToAlignSym() {
return SecToAlignSym;
}
};
} // end namespace llvm
#endif // LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H
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