[llvm] [InstCombine] Pattern match minmax calls for unsigned saturation. (PR #99250)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

@huihzhang Please update the alive2 link for `smax(UINT_MIN, sub(zext(A), zext(B))) -> usub_sat` in the PR description.


https://github.com/llvm/llvm-project/pull/99250