[PATCH] Add support for parsing the not operator in Microsoft inline assembly

[Ehsan Akhgari]

>>! In D4391#8, @majnemer wrote:
> LGTM.  Out of curiosity, does it work with parenthesized expressions? e.g. ~(3 + ~7)

No, I didn't fix that because I realized that doesn't work with minus either (such as `-(3 + 7)`).  If you want, I can give that a shot too.

http://reviews.llvm.org/D4391