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Commit e3abb145 authored by Chris Lattner's avatar Chris Lattner
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Use the PotDoms map to memoize 'dominating value' lookup. With this patch, 

LCSSA is still the slowest pass when gccas'ing 252.eon, but now it only takes
39s instead of 289s. :)

llvm-svn: 28776
parent 632ee8de
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