[llvm] [SLP] Support memory runtime alias checks (PR #203631)

[Alexey Bataev via llvm-commits]

alexey-bataev wrote:

> LLVM 23 branches tomorrow, can this be landed after that? This seems like a change likely to cause many regressions.

Yep, reverting it to fix postcommit review, will wait for the branching. Was going to do that, actually, but forgot

https://github.com/llvm/llvm-project/pull/203631