[PATCH] D92808: [ObjC][ARC] Annotate calls with attributes instead of emitting retainRV or claimRV calls in the IR

[Akira Hatanaka via Phabricator via cfe-commits]

ahatanak added a comment.

ToT clang/llvm (without this patch) is turning the call to 
`@objc_unsafeClaimAutoreleasedReturnValue` in the EH cleanup block into an 
unreachable when compiling the following code. It looks like this happens 
because the inliner isn't adding the funclet token, but it's not clear to me 
whether this is a bug or not.

$ cat test.mm

  void foo();
  id noexcept_func() noexcept;
  
  struct S0 {
    id x;
    ~S0() {
      noexcept_func();
    }
  };
  
  void test_attr_claimRV() {
    S0 s0;
    foo();
  }

$ clang++ -std=c++11 -fobjc-arc  test.mm -O3 -S -o - 
"-fobjc-runtime=ios-11.0.0" -target aarch64-unknown-windows-msvc


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D92808/new/

https://reviews.llvm.org/D92808

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