[llvm] Revert "[SCEV] Fold (C1 * A /u C2) -> A /u (C2 /u C1), if C2 > C1." (PR #158328)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

> There are multiple reports that this is causing miscompiles in the MSan test suite after bootstrapping 

To clarify, my understanding as per @ilovepi 's latest comment in https://github.com/llvm/llvm-project/pull/157656#issuecomment-3283027844 is that the MSan bootstrap failures are not related to the patch.

If they are actually related, please let me know, as that currently would be the only actionable way to get a reproducer.


https://github.com/llvm/llvm-project/pull/158328