Nate Chandler d765434e2b [IRGen] Restored non-constant async function calls in PAFs. ...

Previously, because partial apply forwarders for async functions were
not themselves fully-fledged async functions, they were not able to
handle dynamic functions.  Specifically, the reason was that it was not
possible to produce an async function pointer for the partial apply
forwarder because the size to be used was not knowable.

Thanks to https://github.com/apple/swift/pull/36700, that cause has been
eliminated.  With it, partial apply forwarders are fully-fledged async
functions and in particular have their own async function pointers.
Consequently, it is again possible for these partial apply forwarders to
handle non-constant function pointers.

Here, that behavior is restored, by way of reverting part of
ee63777332 while preserving the ABI it
introduced.

rdar://76122027

2021-04-06 15:51:32 -07:00

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