[PATCH] D64678: [Sema] Fix -Wuninitialized for struct assignment from GNU C statement expression

[Richard Smith - zygoloid via Phabricator via cfe-commits]

rsmith added a comment.

I don't think this problem really has anything to do with statement expressions; consider:

  struct Widget a = (init2(&a), a);

... which has the same behaviour and presumably produces the same warning.

It's just a C / C++ difference. In C++, these examples are undefined because the lifetime of the object hasn't started yet, but I think in C they're valid. We should just disable the whole warning in C mode and leave it to the CFG analysis.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D64678/new/

https://reviews.llvm.org/D64678