vtable layout

[Christophe de Dinechin]

>  > You need to locate them so that the address differences
>
>  >    &cvt-B-to-D - &B-in-D-vtable
>  >    &cvt-C-to-D - &C-in-D-vtable
>
>  > are equal
>
> I don't see why.  The D::C and D::B vtables can refer to different  
entry
> points, so they can look in different places to find the 'this'
> adjustment.

You could do that, but then that's no longer the scheme we  
discussed. The whole point of adjusting late is to have a single  
adjusting entry point, which is where speed and space benefits come  
from.


Christophe