[PATCH] D76997: Fix StringRef::strLen in windows with clang++ C++17

[Reid Kleckner via Phabricator via llvm-commits]

rnk added a comment.

If the compiler has the builtin, IMO we should prefer the builtin. It's always going to be better and faster than the library implementation. I would recommend reordering the ifdefs to prefer `__builtin_strlen` over the STL.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D76997/new/

https://reviews.llvm.org/D76997