[llvm] [RISCV] tt-ascalon-d8 vector scheduling (PR #167066)

[Petr Penzin via llvm-commits]

ppenzin wrote:

> yeah speaking of this, we really need a more elegant way to clean up -- potentially centralize -- all scheduling model tests. Otherwise it's really easy to miss test coverage.

Yeah, we do. There was discussion at the summit about potentially using UnifiedDB for this, thought it's support for vector constraints isn't complete. 

https://github.com/llvm/llvm-project/pull/167066