[PATCH] D25264: Implement MS _BitScan intrinsics

[David Majnemer via cfe-commits]

majnemer added inline comments.


> agutowski wrote in CGBuiltin.cpp:2665
> Is this line needed? I took it from __builtin_fpclassify, but I don't know what could be its purpose (it's repeated below, where the "bitscan_end" block really starts).

It's needed for the call to CreatePHI to be in the correct basic block.

https://reviews.llvm.org/D25264