[llvm] [LLVM][NVPTX] Add cp.async.bulk.commit/wait intrinsics (PR #78698)

[Durgadoss R via llvm-commits]

durga4github wrote:

> No, the patch looks good, just making sure we're not missing anything. ptxas tests are not enabled by default and folks are usually unaware of them. They are, however, very useful when we introduce new instructions. I should probably document it... somewhere.

Yes, agree totally. I did not know that ptxas tests are not run by default. (I thought they were being run).

If we are okay with adding the range check later (if and when it makes it to PTX spec), could you please help merge this PR?

https://github.com/llvm/llvm-project/pull/78698