| //===-- HexagonAsmBackend.cpp - Hexagon Assembler Backend -----------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "HexagonMCTargetDesc.h" |
| #include "llvm/MC/MCAsmBackend.h" |
| #include "llvm/MC/MCELFObjectWriter.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| |
| class HexagonAsmBackend : public MCAsmBackend { |
| public: |
| HexagonAsmBackend(Target const & /*T*/) {} |
| |
| unsigned getNumFixupKinds() const override { return 0; } |
| |
| void applyFixup(MCFixup const & /*Fixup*/, char * /*Data*/, |
| unsigned /*DataSize*/, uint64_t /*Value*/, |
| bool /*IsPCRel*/) const override { |
| return; |
| } |
| |
| bool mayNeedRelaxation(MCInst const & /*Inst*/) const override { |
| return false; |
| } |
| |
| bool fixupNeedsRelaxation(MCFixup const & /*Fixup*/, uint64_t /*Value*/, |
| MCRelaxableFragment const * /*DF*/, |
| MCAsmLayout const & /*Layout*/) const override { |
| llvm_unreachable("fixupNeedsRelaxation() unimplemented"); |
| } |
| |
| void relaxInstruction(MCInst const & /*Inst*/, |
| MCInst & /*Res*/) const override { |
| llvm_unreachable("relaxInstruction() unimplemented"); |
| } |
| |
| bool writeNopData(uint64_t /*Count*/, |
| MCObjectWriter * /*OW*/) const override { |
| return true; |
| } |
| }; |
| } // end anonymous namespace |
| |
| namespace { |
| class ELFHexagonAsmBackend : public HexagonAsmBackend { |
| uint8_t OSABI; |
| |
| public: |
| ELFHexagonAsmBackend(Target const &T, uint8_t OSABI) |
| : HexagonAsmBackend(T), OSABI(OSABI) {} |
| |
| MCObjectWriter *createObjectWriter(raw_ostream &OS) const override { |
| StringRef CPU("HexagonV4"); |
| return createHexagonELFObjectWriter(OS, OSABI, CPU); |
| } |
| }; |
| } // end anonymous namespace |
| |
| namespace llvm { |
| MCAsmBackend *createHexagonAsmBackend(Target const &T, |
| MCRegisterInfo const & /*MRI*/, |
| StringRef TT, StringRef /*CPU*/) { |
| uint8_t OSABI = MCELFObjectTargetWriter::getOSABI(Triple(TT).getOS()); |
| return new ELFHexagonAsmBackend(T, OSABI); |
| } |
| } |