[flang] [llvm] [mlir] [flang][OpenMP] Enable tiling (PR #143715)

[Tom Eccles via llvm-commits]

tblah wrote:

> This is the next step that @Meinersbur is working on, but we wanted to make tiling available sooner.

Are you against a deadline for the tiling support? @Meinersbur's patch is already up for review and looked high quality to me. I don't think it is that far away from being approved. Maybe the tiling support should be based upon that patch.

https://github.com/llvm/llvm-project/pull/143715