diff options
Diffstat (limited to 'lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp')
| -rw-r--r-- | lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp | 48 |
1 files changed, 12 insertions, 36 deletions
diff --git a/lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp b/lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp index 027db44..26a8fae 100644 --- a/lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp +++ b/lib/Target/SystemZ/MCTargetDesc/SystemZMCAsmBackend.cpp @@ -35,15 +35,6 @@ static uint64_t extractBitsForFixup(MCFixupKind Kind, uint64_t Value) { llvm_unreachable("Unknown fixup kind!"); } -// If Opcode is a relaxable interprocedural reference, return the relaxed form, -// otherwise return 0. -static unsigned getRelaxedOpcode(unsigned Opcode) { - switch (Opcode) { - case SystemZ::BRAS: return SystemZ::BRASL; - } - return 0; -} - namespace { class SystemZMCAsmBackend : public MCAsmBackend { uint8_t OSABI; @@ -59,14 +50,20 @@ public: LLVM_OVERRIDE; virtual void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize, uint64_t Value) const LLVM_OVERRIDE; - virtual bool mayNeedRelaxation(const MCInst &Inst) const LLVM_OVERRIDE; + virtual bool mayNeedRelaxation(const MCInst &Inst) const LLVM_OVERRIDE { + return false; + } virtual bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value, const MCRelaxableFragment *Fragment, const MCAsmLayout &Layout) const - LLVM_OVERRIDE; + LLVM_OVERRIDE { + return false; + } virtual void relaxInstruction(const MCInst &Inst, - MCInst &Res) const LLVM_OVERRIDE; + MCInst &Res) const LLVM_OVERRIDE { + llvm_unreachable("SystemZ does do not have assembler relaxation"); + } virtual bool writeNopData(uint64_t Count, MCObjectWriter *OW) const LLVM_OVERRIDE; virtual MCObjectWriter *createObjectWriter(raw_ostream &OS) const @@ -114,28 +111,6 @@ void SystemZMCAsmBackend::applyFixup(const MCFixup &Fixup, char *Data, } } -bool SystemZMCAsmBackend::mayNeedRelaxation(const MCInst &Inst) const { - return getRelaxedOpcode(Inst.getOpcode()) != 0; -} - -bool -SystemZMCAsmBackend::fixupNeedsRelaxation(const MCFixup &Fixup, - uint64_t Value, - const MCRelaxableFragment *Fragment, - const MCAsmLayout &Layout) const { - // At the moment we just need to relax 16-bit fields to wider fields. - Value = extractBitsForFixup(Fixup.getKind(), Value); - return (int16_t)Value != (int64_t)Value; -} - -void SystemZMCAsmBackend::relaxInstruction(const MCInst &Inst, - MCInst &Res) const { - unsigned Opcode = getRelaxedOpcode(Inst.getOpcode()); - assert(Opcode && "Unexpected insn to relax"); - Res = Inst; - Res.setOpcode(Opcode); -} - bool SystemZMCAsmBackend::writeNopData(uint64_t Count, MCObjectWriter *OW) const { for (uint64_t I = 0; I != Count; ++I) @@ -143,8 +118,9 @@ bool SystemZMCAsmBackend::writeNopData(uint64_t Count, return true; } -MCAsmBackend *llvm::createSystemZMCAsmBackend(const Target &T, StringRef TT, - StringRef CPU) { +MCAsmBackend *llvm::createSystemZMCAsmBackend(const Target &T, + const MCRegisterInfo &MRI, + StringRef TT, StringRef CPU) { uint8_t OSABI = MCELFObjectTargetWriter::getOSABI(Triple(TT).getOS()); return new SystemZMCAsmBackend(OSABI); } |