[clang] [llvm] [clang/LLVM] Add flatten_deep attribute for depth-limited inlining (1/2) (PR #165777)

[Erich Keane via llvm-commits]

https://github.com/erichkeane commented:

Please update the github description + title to use the new name.

Doing function level first is acceptable to me.

Please try to get a dependent test for the argument, it seems that anything function-level like this should work in cases where there is dependent values.

https://github.com/llvm/llvm-project/pull/165777