[PATCH] D143813: [ClangFE] Check that __sync builtins are naturally aligned.

[Akira Hatanaka via Phabricator via cfe-commits]

ahatanak added a comment.

In D143813#4257943 <https://reviews.llvm.org/D143813#4257943>, @jonpa wrote:

> I don't understand the first argument - I thought it was supposed to be just an address...

It's a statement expression. https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html

The value of the last subexpression serves as the value of the entire construct.


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