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//===-- RISCVAsmBackend.h - RISC-V Assembler 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
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVASMBACKEND_H
#define LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVASMBACKEND_H
#include "MCTargetDesc/RISCVBaseInfo.h"
#include "MCTargetDesc/RISCVFixupKinds.h"
#include "MCTargetDesc/RISCVMCTargetDesc.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCSubtargetInfo.h"
namespace llvm {
class MCAssembler;
class MCObjectTargetWriter;
class raw_ostream;
class RISCVAsmBackend : public MCAsmBackend {
const MCSubtargetInfo &STI;
uint8_t OSABI;
bool Is64Bit;
const MCTargetOptions &TargetOptions;
// Temporary symbol used to check whether a PC-relative fixup is resolved.
MCSymbol *PCRelTemp = nullptr;
bool isPCRelFixupResolved(const MCSymbol *SymA, const MCFragment &F);
StringMap<MCSymbol *> VendorSymbols;
public:
RISCVAsmBackend(const MCSubtargetInfo &STI, uint8_t OSABI, bool Is64Bit,
bool IsLittleEndian, const MCTargetOptions &Options);
~RISCVAsmBackend() override = default;
std::optional<bool> evaluateFixup(const MCFragment &, MCFixup &, MCValue &,
uint64_t &) override;
bool addReloc(const MCFragment &, const MCFixup &, const MCValue &,
uint64_t &FixedValue, bool IsResolved);
void maybeAddVendorReloc(const MCFragment &, const MCFixup &);
void applyFixup(const MCFragment &, const MCFixup &, const MCValue &Target,
uint8_t *Data, uint64_t Value, bool IsResolved) override;
std::unique_ptr<MCObjectTargetWriter>
createObjectTargetWriter() const override;
bool fixupNeedsRelaxationAdvanced(const MCFragment &, const MCFixup &,
const MCValue &, uint64_t,
bool) const override;
std::optional<MCFixupKind> getFixupKind(StringRef Name) const override;
MCFixupKindInfo getFixupKindInfo(MCFixupKind Kind) const override;
bool mayNeedRelaxation(unsigned Opcode, ArrayRef<MCOperand> Operands,
const MCSubtargetInfo &STI) const override;
void relaxInstruction(MCInst &Inst,
const MCSubtargetInfo &STI) const override;
bool relaxAlign(MCFragment &F, unsigned &Size) override;
bool relaxDwarfLineAddr(MCFragment &) const override;
bool relaxDwarfCFA(MCFragment &) const override;
std::pair<bool, bool> relaxLEB128(MCFragment &LF,
int64_t &Value) const override;
bool writeNopData(raw_ostream &OS, uint64_t Count,
const MCSubtargetInfo *STI) const override;
const MCTargetOptions &getTargetOptions() const { return TargetOptions; }
};
}
#endif
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