[PATCH] D25264: Implement MS _BitScan intrinsics

[Reid Kleckner via cfe-commits]

rnk added a comment.

Nice, probably ready to land with one revision.



> majnemer wrote in CGBuiltin.cpp:2640-2647
> This should be in an anonymous namespace. Also, consider using an `enum class` instead of an `enum` nested inside a namespace.

Let's also use a more specific name than MSVC, maybe MSVCIntrin or something.

https://reviews.llvm.org/D25264