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Author SHA1 Message Date
Chen Zheng c6c6f717af [NFC] run specific pass instead of whole -O3 pipeline for popcount recoginzation testcase. 
llvm-svn: 374514
 2019-10-11 05:30:18 +00:00
Chen Zheng c17c5864ff [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
 2019-10-11 05:13:56 +00:00