[PATCH] D142078: [llvm] Move bit counting functions to bit.h (NFC)

[Kazu Hirata via Phabricator via llvm-commits]

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This patch provides C++20-style countl_zero, countr_zero, countl_one,
and countl_one in bit.h.  Existing functions like countLeadingZeros
become wrappers around the new functions.

Note that I cannot quite declare countLeadingZeros as:

  template <class T> using countLeadingZeros = countl_zero<T>;

because countl_zero returns int, whereas countLeadingZeros returns
unsigned.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D142078

Files:
  llvm/include/llvm/ADT/bit.h
  llvm/include/llvm/Support/MathExtras.h

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