[tree-ssa] Lowering of VLA's

[Zdenek Dvorak]

Hello,

>  >whereas if you make it as builtin, you must hack every optimizer so that
>  >it knows that it behaves specially.
> No we don't.  That's the whole point, the optimizers can and should treat
> it like every other call.  There's no need to treat it specially.  

for now it is.  For example you may safely move call out of a bind_expr
it belongs to.

Zdenek