[tree-ssa] Maintaining/representing def-use/use-def information

[Zdenek Dvorak]

Hello,

> > > Ultimately, I dont see much difference other than implementation
> > > details...
> > 
> > ... and about three times more memory spent, I would estimate. For a
> > single assignment statement, we have:
> 
> Which is an implementation detail, not an architecture one.

on contrary, I see this as a major architectural decision -- identifying the
variable with the statement that defines it is a very interesting idea.

Zdenek