[cfe-dev] [RFC] Should an illegal C++11 memory model in an atomic op be an error?

[Tim Northover]

> I'd be in favor or promoting it to an error. We recently started rejecting this code, for example:

I'm not sure I would. Deciding on the diagnostics for our own intrinsics is one thing, but this would trigger on well-formed programs according to the standard.

That's rather a bigger step to take, and we should probably be comparing it to situations with that similarity (the only one I know of is ARM64 complaining more strongly about functions without prototypes).

Cheers.

Tim.