[llvm] [SCEV] Fold (C1 * A /u C2) -> A /u (C2 /u C1), if C2 > C1. (PR #157656)

[Augie Fackler via llvm-commits]

durin42 wrote:

I'm seeing some segfaults in Rust that root-cause to this change, I'll try and figure out more later.

https://github.com/llvm/llvm-project/pull/157656