[llvm] [InstCombine] Add an additional nnan constraint for xfrm fcmp + sel => fmax/fmin (PR #117977)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> https://alive2.llvm.org/ce/z/4PKqnZ
> 
> You should drop `nnan` in the new `maxnum/minnum` instead of blocking this transform.

Ignore me. @nikic already pointed out this.


https://github.com/llvm/llvm-project/pull/117977