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Reenable compact unwind by default. However, also emit the old version of unwind

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llvm-svn: 139206
This commit is contained in:
Bill Wendling 2011-09-06 23:47:14 +00:00
parent 9ae90800a2
commit 763ed58408
1 changed files with 1 additions and 8 deletions
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9
lib/Target/X86/X86FrameLowering.cpp
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@ -35,13 +35,6 @@ 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();
}
@ -908,7 +901,7 @@ void X86FrameLowering::emitPrologue(MachineFunction &MF) const {
}
// Darwin 10.7 and greater has support for compact unwind encoding.
if (GenerateCompactUnwind && STI.getTargetTriple().isMacOSX() &&
if (STI.getTargetTriple().isMacOSX() &&
!STI.getTargetTriple().isMacOSXVersionLT(10, 7))
MMI.setCompactUnwindEncoding(getCompactUnwindEncoding(MF));
}