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Commit 2ff4dc0f authored by Jakob Stoklund Olesen's avatar Jakob Stoklund Olesen
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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
parent 9ddfa89b
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