[llvm] [DAG] - computeKnownFPClass - ISD::FMAXIMUM/ISD::FMINIMUM + ISD::FMAXIMUMNUM/ISD::FMINIMUMNUM (PR #190465)

[Simon Pilgrim via llvm-commits]

https://github.com/RKSimon requested changes to this pull request.

remove the waste of time attributor test and create codegen tests - I'd recommend locally disabling the min/max cases in SelectionDAG  isKnownNeverNaN and use the test regressions (probably mainly in check-llvm-codegen-amdgpu) to help you create fresh tests

https://github.com/llvm/llvm-project/pull/190465