SEGV in do_simple_structure_copy

[Daniel Berlin]

> > Thinking harder about it, you might be better off then making  
> > everything based on TYPE_SIZE then, since we don't always have the  
> > FIELD_DECL's handy.
> 
>  I'm not sure we can.
> 
>  I think we must have an integral mode (and size)  for the type to be
>  able to place the field on a non-byte-aligned boundary.
> 
> 
No, i meant in tree-ssa-structalias.c. The results you get by doing this
should be fine.