[llvm] r190290 - Generate compact unwind encoding from CFI directives.

[Rafael Espíndola]

>> One nit, can the "llc -filetype=obj" be converted to use llvm-mc?
>> After all, this is exactly what this patch made possible, no?
>>
> I'm not sure I understand how it would use llvm-mc...?

Sorry, it is already using llvm-mc. The nit was just that instead of

llc -filetype=obj...
llc | llvm-mc -filetype=obj

It would be nicer for the .ll test to check the printed assembly, and
to have a second .s test that just tests llvm-mc.

Cheers,
Rafael