[PATCH] D45321: [atomics] Fix runtime calls for misaligned atomics

[Tim Northover via Phabricator via llvm-commits]

t.p.northover added a comment.

> Bug won't clang lower these access to the exactly that IR that LLVM declares as UB?

No, it explicitly checks alignment to decide whether to make a libcall itself.

Also, the LLVM situation is even more nuanced: after r320243 I think the LangRef is out of date and misaligned ones can't be called UB; fortunately, it also seems to do the right thing.


Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D45321