[Mlir-commits] [mlir] [mlir][gpu] Add gpu.ballot operation to GPU dialect (PR #188647)

[Krzysztof Drewniak]

krzysz00 wrote:

I'd go ahead and add them back to save everyone else from having to realize this landed and send in tiny commits to implement it - especially since I suspect all those backends might see some use in IREE.

I think it might also be worth putting a note in the docs about what semantics we're expecting with regards to control flow - ex. is there any restriction on calling ballot from inside a divergent if statement? (I suspect "no" but it's worth checking.)

https://github.com/llvm/llvm-project/pull/188647