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Commit 39a1e0a3 authored by Chris Lattner's avatar Chris Lattner
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Use a new VRegPHIUseCount to compute uses of PHI values by other phi values 

in the basic block being processed.  This fixes PhiElimination on kimwitu++
from taking 105s to taking a much more reasonable 0.6s (in a debug build).

llvm-svn: 13453
parent a2f7b9bd
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