[PATCH] D15568: [X86] Add signed aliases for popcnt intrinsics

[Joerg Sonnenberger via llvm-commits]

On Wed, Dec 16, 2015 at 02:07:08PM +0000, Michael Kuperstein via llvm-commits wrote:
> The Intel manual documents both an unsigned form (_mm_popcnt_u32) and a signed form (_popcnt32) of the intrinsic.

What's the semantic for negative input?

Joerg