[PATCH] D137939: [CGObjC] Open cleanup scope before SaveAndRestore CurrentFuncletPad and push CatchRetScope early

[Stefan Gränitz via Phabricator via cfe-commits]

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Pushing the `CatchRetScope` early causes cleanups for catch parameters to be emitted in the basic block of the catch handler instead of the `catchret.dest` block. This is important because the latter is not part of the catchpad and this caused code truncations due to ARC PreISel intrinsics in WinEHPrepare.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D137939

Files:
  clang/lib/CodeGen/CGObjCRuntime.cpp
  clang/test/CodeGenObjCXX/arc-exceptions-seh.mm

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