On 19 Aug 2014, at 11:03, Kagamin via digitalmars-d-ldc wrote:
> Such things should be tested with IR to see if the feature is provided by LLVM at all.

LLVM indeed provides this feature; in fact, that's the entire point of the intrinsic in question.

The problem is that inline IR support was not written with this sort of dependencies in mind (and I don't see us making any stability guarantees for the generated IR, e.g. that "foo:" is always lowered to %label_foo).

It might be possible and reasonable to delay emitting any inline IR wrapper function bodies until after the main function has been completed. In fact, it shouldn't even be too difficult to throw together a quick implementation, but unfortunately, I don't have the time to look into this right now.

Cheers,
David