[llvm] [X86] Try Folding icmp of v8i32 -> fcmp of v8f32 on AVX (PR #82290)

[via llvm-commits]

goldsteinn wrote:

> @goldsteinn Would you be willing to split the bitcast comparisons into a followup patch and just get the int2fp version done first?

Will do.

https://github.com/llvm/llvm-project/pull/82290