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1//===-- LoongArchAsmBackend.h - LoongArch Assembler Backend ---*- C++ -*---===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file defines the LoongArchAsmBackend class.10//11//===----------------------------------------------------------------------===//12 13#ifndef LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H14#define LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H15 16#include "MCTargetDesc/LoongArchBaseInfo.h"17#include "MCTargetDesc/LoongArchFixupKinds.h"18#include "MCTargetDesc/LoongArchMCTargetDesc.h"19#include "llvm/MC/MCAsmBackend.h"20#include "llvm/MC/MCExpr.h"21#include "llvm/MC/MCSection.h"22#include "llvm/MC/MCSubtargetInfo.h"23 24namespace llvm {25 26class LoongArchAsmBackend : public MCAsmBackend {27 const MCSubtargetInfo &STI;28 uint8_t OSABI;29 bool Is64Bit;30 const MCTargetOptions &TargetOptions;31 DenseMap<MCSection *, const MCSymbolRefExpr *> SecToAlignSym;32 // Temporary symbol used to check whether a PC-relative fixup is resolved.33 MCSymbol *PCRelTemp = nullptr;34 35 bool isPCRelFixupResolved(const MCSymbol *SymA, const MCFragment &F);36 37public:38 LoongArchAsmBackend(const MCSubtargetInfo &STI, uint8_t OSABI, bool Is64Bit,39 const MCTargetOptions &Options);40 41 bool addReloc(const MCFragment &, const MCFixup &, const MCValue &,42 uint64_t &FixedValue, bool IsResolved);43 44 void applyFixup(const MCFragment &, const MCFixup &, const MCValue &Target,45 uint8_t *Data, uint64_t Value, bool IsResolved) override;46 47 std::optional<MCFixupKind> getFixupKind(StringRef Name) const override;48 49 MCFixupKindInfo getFixupKindInfo(MCFixupKind Kind) const override;50 51 bool relaxAlign(MCFragment &F, unsigned &Size) override;52 bool relaxDwarfLineAddr(MCFragment &) const override;53 bool relaxDwarfCFA(MCFragment &) const override;54 std::pair<bool, bool> relaxLEB128(MCFragment &F,55 int64_t &Value) const override;56 57 bool writeNopData(raw_ostream &OS, uint64_t Count,58 const MCSubtargetInfo *STI) const override;59 60 std::unique_ptr<MCObjectTargetWriter>61 createObjectTargetWriter() const override;62 const MCTargetOptions &getTargetOptions() const { return TargetOptions; }63 DenseMap<MCSection *, const MCSymbolRefExpr *> &getSecToAlignSym() {64 return SecToAlignSym;65 }66};67} // end namespace llvm68 69#endif // LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H70