[polly] [Polly] Detect preconditions of cached user assumption translations (PR #226204)

[Timur Baidusenov via llvm-commits]

bai-tim wrote:

> LGTM
> 
> There is a related bug where the precondition assumption is not part of the expression inside the assumption, but from the control flow that leads to the __builtin_assume. I created a bug for this: #226419
> 
> Would you like me to land this PR?

Thanks, I will explore this bug.

Yes, could you please land this)

https://github.com/llvm/llvm-project/pull/226204