[llvm] [X86] Fold (v4i32 (scalar_to_vector (i32 (zext (bitcast (f16)))))) -> (v4i32 bitcast (shuffle (v8f16 scalar_to_vector))) (PR #126033)

[Phoebe Wang via llvm-commits]

https://github.com/phoebewang commented:

> How about avoid to generate zext? #126194

Ok, it's still useful for strict FP cases.

https://github.com/llvm/llvm-project/pull/126033