[clang] [llvm] [Coroutines] Mark parameter allocas with coro.outside.frame metadata (PR #127653)

[Chuanqi Xu via cfe-commits]

ChuanqiXu9 wrote:

> Even for a real suspend, though, isn't it still possible for the coroutine to be resumed on a different thread, completed, and the frame deleted, all before the coroutine ramp finishes executing on the current thread?

Technically possible, you got me.

https://github.com/llvm/llvm-project/pull/127653