[llvm] [AArch64] Use SVE2 bit-sel instructions for some binary patterns. (PR #147544)

[Ricardo Jesus via llvm-commits]

rj-jesus wrote:

> I think we may end up wanting to introduce some pseudo instructions so that we can pick the operands based on the result of register allocation but for today I doubt we'll ever be worse off so let's see how it play out.

Yep, and presumably going that route could also benefit other instructions like EOR3.

https://github.com/llvm/llvm-project/pull/147544