Is there a way of distinguishing this particular variant (possible
tail-packing), or will we have to disallow storing into the record tail
padding altogether? That would seriously suck.
Basically you can only touch the size of the CLASSTYPE_AS_BASE variant.
For many classes this will be the same as the size of the class itself.
All this code is in the middle end, so we're language agnostic.
What do we need here, a hook to query the front-end, or is it too late?
Or will we have to play it conservative and never touch the padding
(regardless of language)?
Aldy
