[PATCH] D69334: [MathExtras] Add intrinsic for the PopulationCounter in Visual Studio

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

I'm pretty sure MSVC will always turn this into a popcnt instruction on X86. It has no fall back because MSVC doesn't have a concept of a target CPU. So this would only work on a Nehalem or newer CPU that implements the instruction.


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https://reviews.llvm.org/D69334