[PATCH] D37093: [coroutines] Promote cleanup.dest.slot-like allocas to registers to avoid storing them in the coroutine frame

[Gor Nishanov via Phabricator via llvm-commits]

GorNishanov added a comment.

In https://reviews.llvm.org/D37093#858860, @majnemer wrote:

> Seems fragile. What if we run optimizations and transform the IR to another, different, version of the IR but the alloca is not promotable anymore? On occasion, the compiler can pessimize a code sequence and coroutine lowering should be resilient to such things.


I can run the promotion of alloca in CoroEarly before any optimization passes could interfere. Essentially, cleaning up after the frontend "heavy handed" :-) cleanup code codegen.


https://reviews.llvm.org/D37093