[PATCH] D74387: [SYCL] Do not diagnose use of __float128

[John McCall via Phabricator via cfe-commits]

rjmccall added a comment.

The right approach here is probably what we do in ObjC ARC when we see types that are illegal in ARC: in system headers, we allow the code but add a special `UnavailableAttr` to the declaration so that it can't be directly used.

That is straightforward enough that I think you should just do it instead of leaving this as technical debt.


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