[PATCH] D49718: [CodeGen][ObjC] Make block copy/dispose helper function exception-safe.

[Akira Hatanaka via Phabricator via cfe-commits]

ahatanak created this revision.
ahatanak added a reviewer: rjmccall.
Herald added a subscriber: dexonsmith.

Block copy/dispose helper functions currently aren’t exception-safe. When an exception is thrown in a copy function, the function exits without destroying or releasing C++ objects, ObjC objects, and `__block` objects that have already been copied. Similarly, dispose functions don't release ObjC objects and `__block objects` that are yet to be released when an exception is thrown.


Repository:
  rC Clang

https://reviews.llvm.org/D49718

Files:
  lib/CodeGen/CGBlocks.cpp
  test/CodeGenObjCXX/arc-blocks.mm

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