[llvm] [TTI] Don't drop VP intrinsic args when delegating to non-vp equivalent (PR #147677)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon commented:

I'll get to this in a bit, but first, do a s/undef/poison/?

https://github.com/llvm/llvm-project/pull/147677