[libc-commits] [libc] [libc] Add utility functions for warp-level scan and reduction (PR #84866)

[Shilei Tian via libc-commits]

https://github.com/shiltian approved this pull request.

LGTM. I think we can revisit possible target dependent implementation/improvement on the fly.

https://github.com/llvm/llvm-project/pull/84866