> In general it will be tricky for latter passes to clean up the messes.
> The fundamental problem is that the address computation is exposed to
> PRE prematurely (for a given target ) at GIMPLE level.
Yeah, i'm not sure PRE can really do anything different here.
I also think you would have a very hard time trying to stop everything
from moving invariant computations around at the tree level.
Might make more sense to finish the tree level with a global code
motion pass that is target sensitive or something.
