[libc-commits] [libc] [libc][support][bit] use new type generic builtins (PR #86746)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

I'd like to simplify the implementations such that one day (when our minimum supported compiler versions advance past when these builtins were added), we can clean up/delete a bunch of code.

We might even get there sooner if we start reusing code from libc++.  #86563 is where we're trying to utilize these builtins there, too.

https://github.com/llvm/llvm-project/pull/86746