[llvm] [InstCombine] Add missing fold for `fsqrt(select(b, c1, c2)) => select(b, fsqrt(c1), fsqrt(c2))` (PR #113084)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> Quick question:
> 
> https://alive2.llvm.org/ce/z/YJkX7m
> 
> Isn't this fold already applied in the existing source code?

Yes, that looks like this is already happening 

https://github.com/llvm/llvm-project/pull/113084