[PATCH] D134009: [Coroutines] Introduce `always_complete_coroutine` attribute to guide optimization (1/2)

[Chuanqi Xu via Phabricator via llvm-commits]

ChuanqiXu added a reviewer: nikic.
ChuanqiXu added a comment.

In D134009#3794565 <https://reviews.llvm.org/D134009#3794565>, @nikic wrote:

> Can you please specify the semantics of the new attribute in LangRef?

Oh, sorry I forgot due to I thought this in the frontend side.


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