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

[Chuanqi Xu via llvm-commits]

https://github.com/ChuanqiXu9 approved this pull request.

Abstractly the current one looks good to stop the bleeding first.

But for the issue itself, I still feel we can fix it in the middle end. Since the case a coroutine without a suspend point is relatively rare case to me.

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