[clang] [llvm] [LLVM][Coroutines] Perform HALO on "coro_must_elide" coroutines (PR #98974)

[Yuxuan Chen via cfe-commits]

yuxuanchen1997 wrote:

> how do you think about the suggestion to split the middle end patch?

Can do that sure. I will send out new stacked PRs. 

https://github.com/llvm/llvm-project/pull/98974