[PATCH] D144165: [ADT] Provide C++20-style bit functions

[Kazu Hirata via Phabricator via llvm-commits]

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Tihs patches adds APInt::count{l,r}_{zero,one} and APInt::popcount to
be consistent with those functions in ADT/bit.h.

Once this patch lands, I'll take care of migration.

For now, I am intentionally leaving isPowerOf2 as is.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D144165

Files:
  llvm/include/llvm/ADT/APInt.h
  llvm/unittests/ADT/APIntTest.cpp

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