[LLVMdev] [PATCH] CalculateSpillWeights does not need to be a pass

[Arnaud Allard de Grandmaison]

Based on discussions with Lang Hames and Jakob Stoklund Olesen at the
hacker's lab, and in the light of upcoming work on the PBQP register
allocator, it was though that CalcSpillWeights does not need to be a pass.
This change will enable to customize / tune the spill weight computation
depending on the allocator.

Update the documentation style while there.

I also intend to take VirtRegAuxInfo out of line in a later patch as this
is really a helper class for spill weight (re) computation.

Cheers,
--
Arnaud
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