HexagonAsmBackend.cpp [plain text]
#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 & ) {}
unsigned getNumFixupKinds() const override { return 0; }
void applyFixup(MCFixup const & , char * ,
unsigned , uint64_t ,
bool ) const override {
return;
}
bool mayNeedRelaxation(MCInst const & ) const override {
return false;
}
bool fixupNeedsRelaxation(MCFixup const & , uint64_t ,
MCRelaxableFragment const * ,
MCAsmLayout const & ) const override {
llvm_unreachable("fixupNeedsRelaxation() unimplemented");
}
void relaxInstruction(MCInst const & ,
MCInst & ) const override {
llvm_unreachable("relaxInstruction() unimplemented");
}
bool writeNopData(uint64_t ,
MCObjectWriter * ) const override {
return true;
}
};
}
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);
}
};
}
namespace llvm {
MCAsmBackend *createHexagonAsmBackend(Target const &T,
MCRegisterInfo const & ,
StringRef TT, StringRef ) {
uint8_t OSABI = MCELFObjectTargetWriter::getOSABI(Triple(TT).getOS());
return new ELFHexagonAsmBackend(T, OSABI);
}
}