Jakob Stoklund Olesen 2ff4dc0ff2 Make RAFast::UsedInInstr indexed by register units. ...

This fixes some problems with too conservative checking where we were
marking all aliases of a register as used, and then also checking all
aliases when allocating a register.

<rdar://problem/13249625>

llvm-svn: 175782

2013-02-21 19:35:21 +00:00

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