[llvm] [InstSimplify] Optimize maximumnum and minimumnum (PR #139581)

[Lewis Crawford via llvm-commits]

LewisCrawford wrote:

@arsenm I've updated all the fminmax-folds.ll tests now after the refactor in https://github.com/llvm/llvm-project/pull/160504

The diff is now `139 insertions(+), 106 deletions(-)`, so it should hopefully be a lot easier to review than the previous version with +1800 new lines if you've got time to take another look at this patch some times soon.

https://github.com/llvm/llvm-project/pull/139581