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Commit c17c5864 authored by Chen Zheng's avatar Chen Zheng
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[InstCombine] recognize popcount. 

  This patch recognizes popcount intrinsic according to algorithm from website
  http://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetParallel

Differential Revision: https://reviews.llvm.org/D68189

llvm-svn: 374512
parent 34a3b24a
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