[llvm] [InstSimplify] Simplify fcmp implied by dominating fcmp (PR #161090)

[Rajveer Singh Bharadwaj via llvm-commits]

https://github.com/Rajveer100 commented:

I believe this is the `fcmp` version of the already existing `isImpliedCondICmps`, implementation and tests look good to me.

> We may need to adjust JumpThreading to handle this case.

Why can't it be done here if I may ask?

https://github.com/llvm/llvm-project/pull/161090