| //===-- MipsAsmBackend.h - Mips 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 MipsAsmBackend class. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| |
| #ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H |
| #define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H |
| |
| #include "MCTargetDesc/MipsFixupKinds.h" |
| #include "llvm/ADT/Triple.h" |
| #include "llvm/MC/MCAsmBackend.h" |
| |
| namespace llvm { |
| |
| class MCAssembler; |
| struct MCFixupKindInfo; |
| class MCObjectWriter; |
| class MCRegisterInfo; |
| class MCSymbolELF; |
| class Target; |
| |
| class MipsAsmBackend : public MCAsmBackend { |
| Triple TheTriple; |
| bool IsN32; |
| |
| public: |
| MipsAsmBackend(const Target &T, const MCRegisterInfo &MRI, const Triple &TT, |
| StringRef CPU, bool N32) |
| : MCAsmBackend(TT.isLittleEndian() ? support::little : support::big), |
| TheTriple(TT), IsN32(N32) {} |
| |
| 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; |
| |
| Optional<MCFixupKind> getFixupKind(StringRef Name) const override; |
| const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override; |
| |
| unsigned getNumFixupKinds() const override { |
| return Mips::NumTargetFixupKinds; |
| } |
| |
| /// @name Target Relaxation Interfaces |
| /// @{ |
| |
| /// MayNeedRelaxation - Check whether the given instruction may need |
| /// relaxation. |
| /// |
| /// \param Inst - The instruction to test. |
| bool mayNeedRelaxation(const MCInst &Inst, |
| const MCSubtargetInfo &STI) 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 {} |
| |
| /// @} |
| |
| bool writeNopData(raw_ostream &OS, uint64_t Count) const override; |
| |
| bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup, |
| const MCValue &Target) override; |
| |
| bool isMicroMips(const MCSymbol *Sym) const override; |
| }; // class MipsAsmBackend |
| |
| } // namespace |
| |
| #endif |