[PATCH] [Power] Add a new feature flag for support of the sync instruction

[Bill Schmidt]

I can't speak to processors prior to power3, but you'd be hard-pressed to find one of those dawn-of-time systems operating today anyway.  Mostly this looks fine.  However, I am unclear why you have different values for "generic" and "ppc" which appear to be otherwise identical.  (But I don't know what "generic" is used for, either.)  If "generic" means minimum possible instruction set, I would think you would leave FeatureSYNC out for it.

http://reviews.llvm.org/D5316