[clang] [llvm] [OpenMP][Clang] Parsing/Sema support for `use_device_ptr(fb_preserve/fb_nullify)`. (2/4) (PR #170578)

[Zahira Ammarguellat via cfe-commits]

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

Looks good. Thanks.

https://github.com/llvm/llvm-project/pull/170578