[PATCH] D110949: [coro async] Don't use lifetime.start based alloca localization for ABI.Async/ABI.Retcon

[Arnold Schwaighofer via Phabricator via llvm-commits]

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Infinite loops can lead to an IR representation where the lifetime.end
intrinsice is missing. The code to do lifetime based optimization then
fails to see that an address escapes (is life) accross a supspend.

Eventually, we could detect such situations and disable it under more narrow
circumstances. For now, do the correct thing.

rdar://83635953


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D110949

Files:
  llvm/lib/Transforms/Coroutines/CoroFrame.cpp
  llvm/test/Transforms/Coroutines/coro-async-addr-lifetime-infinite-loop-bug.ll

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