mclow.lists added inline comments.
================
Comment at: include/bit:96
#if defined(_LIBCPP_HAS_BITSCAN64)
(defined(_M_AMD64) || defined(__x86_64__))
+ if (_BitScanForward64(&__where, __x))
----------------
I'm not sure this code is ever used - since how can this compile?
https://reviews.llvm.org/D50876
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