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Delete dead code. 

The compact unwind info is only used by code that knows it is supported.

llvm-svn: 211412
This commit is contained in:
Rafael Espindola 2014-06-20 22:30:31 +00:00
parent 332a5e526e
commit df100c337c
1 changed files with 8 additions and 17 deletions
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25
llvm/lib/Target/X86/MCTargetDesc/X86AsmBackend.cpp
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@ -717,11 +717,10 @@ public:
}; };
class DarwinX86_32AsmBackend : public DarwinX86AsmBackend { class DarwinX86_32AsmBackend : public DarwinX86AsmBackend {
bool SupportsCU;
public: public:
DarwinX86_32AsmBackend(const Target &T, const MCRegisterInfo &MRI, DarwinX86_32AsmBackend(const Target &T, const MCRegisterInfo &MRI,
StringRef CPU, bool SupportsCU) StringRef CPU)
: DarwinX86AsmBackend(T, MRI, CPU, false), SupportsCU(SupportsCU) {} : DarwinX86AsmBackend(T, MRI, CPU, false) {}
MCObjectWriter *createObjectWriter(raw_ostream &OS) const override { MCObjectWriter *createObjectWriter(raw_ostream &OS) const override {
return createX86MachObjectWriter(OS, /*Is64Bit=*/false, return createX86MachObjectWriter(OS, /*Is64Bit=*/false,
@ -732,20 +731,16 @@ public:
/// \brief Generate the compact unwind encoding for the CFI instructions. /// \brief Generate the compact unwind encoding for the CFI instructions.
uint32_t generateCompactUnwindEncoding( uint32_t generateCompactUnwindEncoding(
ArrayRef<MCCFIInstruction> Instrs) const override { ArrayRef<MCCFIInstruction> Instrs) const override {
return SupportsCU ? generateCompactUnwindEncodingImpl(Instrs) : 0; return generateCompactUnwindEncodingImpl(Instrs);
} }
}; };
class DarwinX86_64AsmBackend : public DarwinX86AsmBackend { class DarwinX86_64AsmBackend : public DarwinX86AsmBackend {
bool SupportsCU;
const MachO::CPUSubTypeX86 Subtype; const MachO::CPUSubTypeX86 Subtype;
public: public:
DarwinX86_64AsmBackend(const Target &T, const MCRegisterInfo &MRI, DarwinX86_64AsmBackend(const Target &T, const MCRegisterInfo &MRI,
StringRef CPU, bool SupportsCU, StringRef CPU, MachO::CPUSubTypeX86 st)
MachO::CPUSubTypeX86 st) : DarwinX86AsmBackend(T, MRI, CPU, true), Subtype(st) {}
: DarwinX86AsmBackend(T, MRI, CPU, true), SupportsCU(SupportsCU),
Subtype(st) {
}
MCObjectWriter *createObjectWriter(raw_ostream &OS) const override { MCObjectWriter *createObjectWriter(raw_ostream &OS) const override {
return createX86MachObjectWriter(OS, /*Is64Bit=*/true, return createX86MachObjectWriter(OS, /*Is64Bit=*/true,
@ -788,7 +783,7 @@ public:
/// \brief Generate the compact unwind encoding for the CFI instructions. /// \brief Generate the compact unwind encoding for the CFI instructions.
uint32_t generateCompactUnwindEncoding( uint32_t generateCompactUnwindEncoding(
ArrayRef<MCCFIInstruction> Instrs) const override { ArrayRef<MCCFIInstruction> Instrs) const override {
return SupportsCU ? generateCompactUnwindEncodingImpl(Instrs) : 0; return generateCompactUnwindEncodingImpl(Instrs);
} }
}; };
@ -801,9 +796,7 @@ MCAsmBackend *llvm::createX86_32AsmBackend(const Target &T,
Triple TheTriple(TT); Triple TheTriple(TT);
if (TheTriple.isOSBinFormatMachO()) if (TheTriple.isOSBinFormatMachO())
return new DarwinX86_32AsmBackend(T, MRI, CPU, return new DarwinX86_32AsmBackend(T, MRI, CPU);
TheTriple.isMacOSX() &&
!TheTriple.isMacOSXVersionLT(10, 7));
if (TheTriple.isOSWindows() && !TheTriple.isOSBinFormatELF()) if (TheTriple.isOSWindows() && !TheTriple.isOSBinFormatELF())
return new WindowsX86AsmBackend(T, false, CPU); return new WindowsX86AsmBackend(T, false, CPU);
@ -823,9 +816,7 @@ MCAsmBackend *llvm::createX86_64AsmBackend(const Target &T,
StringSwitch<MachO::CPUSubTypeX86>(TheTriple.getArchName()) StringSwitch<MachO::CPUSubTypeX86>(TheTriple.getArchName())
.Case("x86_64h", MachO::CPU_SUBTYPE_X86_64_H) .Case("x86_64h", MachO::CPU_SUBTYPE_X86_64_H)
.Default(MachO::CPU_SUBTYPE_X86_64_ALL); .Default(MachO::CPU_SUBTYPE_X86_64_ALL);
return new DarwinX86_64AsmBackend(T, MRI, CPU, return new DarwinX86_64AsmBackend(T, MRI, CPU, CS);
TheTriple.isMacOSX() &&
!TheTriple.isMacOSXVersionLT(10, 7), CS);
} }
if (TheTriple.isOSWindows() && !TheTriple.isOSBinFormatELF()) if (TheTriple.isOSWindows() && !TheTriple.isOSBinFormatELF())