[llvm] [SCEV] Preserve divisibility info when creating UMax/SMax expressions. (PR #160012)

[Florian Hahn via llvm-commits]

fhahn wrote:

No differences on llvm-opt-benchmark (https://github.com/dtcxzyw/llvm-opt-benchmark/pull/2846), but there are a few changes on large C/C++ corpus with unrolling and vectorization enabled.

https://github.com/llvm/llvm-project/pull/160012