diff options
| -rw-r--r-- | lib/Target/X86/X86FrameLowering.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/Target/X86/X86FrameLowering.cpp b/lib/Target/X86/X86FrameLowering.cpp index 6bc349ffc1..19486f871f 100644 --- a/lib/Target/X86/X86FrameLowering.cpp +++ b/lib/Target/X86/X86FrameLowering.cpp @@ -35,6 +35,13 @@ using namespace llvm; // FIXME: completely move here. extern cl::opt<bool> ForceStackAlign; +// FIXME: Remove once linker support is available. The feature exists only on +// Darwin at the moment. +static cl::opt<bool> +GenerateCompactUnwind("gen-compact-unwind", + cl::desc("Generate compact unwind encoding"), + cl::Hidden); + bool X86FrameLowering::hasReservedCallFrame(const MachineFunction &MF) const { return !MF.getFrameInfo()->hasVarSizedObjects(); } @@ -901,7 +908,7 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF) const { } // Darwin 10.7 and greater has support for compact unwind encoding. - if (STI.getTargetTriple().isMacOSX() && + if (GenerateCompactUnwind && STI.getTargetTriple().isMacOSX() && !STI.getTargetTriple().isMacOSXVersionLT(10, 7)) MMI.setCompactUnwindEncoding(getCompactUnwindEncoding(MF)); } |