swift

04b845cc - [concurrency] Implement protocol witness thunking in SILGen for @execution(caller)/@execution(concurrent).

[concurrency] Implement protocol witness thunking in SILGen for @execution(caller)/@execution(concurrent). This involved cleaning up and generalizing the work from f245389bb3bffcb14eeca30b185a30dc8d4037fe. I followed the same approach: hide the implicit parameter while we run things through translateArgument and friends and then put it back in manually. As an additional benefit, I think I found a good place to put FunctionIsolation onto lowered AnyFunctionTypes that will not cause cycles in the evaluator since it is done in TypeLowering. rdar://148785846