Akira Hatanaka e5df9cc098 [CodeGen] Treat ObjC __unsafe_unretained and class types as trivial ...

when generating copy/dispose helper functions

Analyze the block captures just once before generating copy/dispose
block helper functions and honor the inert `__unsafe_unretained`
qualifier. This refactor fixes a bug where captures of ObjC
`__unsafe_unretained` and class types were needlessly retained/released
by the copy/dispose helper functions.

Differential Revision: https://reviews.llvm.org/D116948

2022-01-11 11:18:24 -08:00

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