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

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

It'd be good to get #82242 fixed - have you any thoughts on how we can reduce the scope of this patch to avoid having to chase regressions so much?

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