[llvm] [ARM] Custom lower UMIN and UMAX for Thumb1 (PR #187881)

[via llvm-commits]

SiliconA-Z wrote:

> @SiliconA-Z Did you try performing this generically in expandIntMINMAX ? Interestingly PPC doesn't use this afaict

Because modern PPC has better instructions that surpass this nowadays that PPC now uses. I'll probably port that when it can't use those. 

The PPC manual was written a while ago.

https://github.com/llvm/llvm-project/pull/187881