[PATCH] D142253: [InstCombine] Transform ctpop(Pow2) -> icmp ne Pow2, 0

[Noah Goldstein via Phabricator via llvm-commits]

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This makes folding to 0/1 later on easier and regardless `icmp ne` is
'probably' faster on most targets (especially for vectors).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D142253

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
  llvm/test/Transforms/InstCombine/ctpop-pow2.ll

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