[llvm] Reapply "[coro][CoroSplit] Use `llvm.lifetime.end` to compute putting objects on the frame vs the stack (#90265) (PR #91372)

[Alan Zhao via llvm-commits]

alanzhao1 wrote:

@nikic do you want to rerun the compile time tests again to see if using `SingleEntrySet` causes any compile-time regressions?

https://github.com/llvm/llvm-project/pull/91372