[clang] [Clang] Implement `__builtin_start_lifetime_as` for C++23 P2590R2 (PR #196502)

[Yash Verma via cfe-commits]

https://github.com/My-Bad-2 converted_to_draft 
https://github.com/llvm/llvm-project/pull/196502
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits