[polly] [Polly] Materialize escaping scalars from empty-domain statements as poison (PR #220008)

[Michael Kruse via llvm-commits]

Meinersbur wrote:

@ShikharJ-Corp The PR's summary that will be used as commit message does not apply anymore. Can you update it before I land?

https://github.com/llvm/llvm-project/pull/220008