[clang] [lldb] [Clang] Introduce OverflowBehaviorType for fine-grained overflow control (PR #148914)

[Justin Stitt via cfe-commits]

JustinStitt wrote:

It is my understanding that we cannot have both 1) overloading on OBT and 2) no mangling on OBT. FWIW, our first user of this may very well be the Linux kernel and I don't think they care much about the overloading semantics of OBTs. Personally, I also don't care which way we go with this. My only goal is to deliver reliable type-level overflow behavior (something our users want).

There is no rush to landing this feature but I do want to resolve ambiguity in design/implementation because now I am getting confused on the semantics folks want out of OBTs. What's the path forward here?

https://github.com/llvm/llvm-project/pull/148914