[RFC] Data tiling for scalable vectors (SVE + SME)

[Andrzej Warzyński]

Hi everyone,

We would like to add support for scalable vectors/matrices (SVE/SME, respectively) to the data-tiling + linalg.mmt4d logic in IREE (and MLIR). There's quite a few elements to this puzzle, hence asking for early feedback to make sure that we're on the right track. Perhaps we've missed something or should be aware of some refactoring that might influence the design?

• https://github.com/openxla/iree/issues/16162#issuecomment-2002436691 

(3rd comment from the top).

Thank you for your help - we are very excited to finally look at DT from the "scalable" perspective :)

-Andrzej