Michael Gottesman 21915ae428 [concurrency] NFC refactor out some code from LowerHopToActor before changing the pass. ...

Specifically, I am refactoring out the code that converts actor/Optional<any
Actor> to an executor in preparation for adding code to LowerHopToExecutor that
handles Builtin.ImplicitIsolationActor.

The only actual functional change is that I made getExecutorForOptionalActor
support being invoked when generating code (i.e. when its SILBuilder has an
insertion point at the end of the block). It previously assumed that it would
always have a real SILInstruction as an insertion point. The changes can be seen
in the places where we now check if the insertion point equals the end of a
block. Its very minor and due to conditional control flow doesn't have any
actual impact given the manner that the code today is generated. This came up in
a subsequent commit when I reuse this code to generate a helper function for
converting Builtin.ImplicitIsolationActor to Builtin.Executor.

2025-08-22 12:40:51 -07:00

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