Erik Eckstein bd5d4276cd SILCombine: fix keypath optimization with optional chaining and classes ...

For optional chaining a swift_enum is created.
If the sub-projection is ending a begin_access in the some-branch, it also needs to be ended in the none-branch.

Fixes a compiler crash and/or a miscompile.

https://bugs.swift.org/browse/SR-14534
rdar://77224220

2021-04-30 21:47:42 +02:00

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