Preserving alias analysis information

[Daniel Berlin]

On 2/19/07, Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> wrote:
> Hello,
>

>
> you might try turning the references to TARGET_MEM_REFs, and copy the
> alias information using copy_ref_info to it.  I am not sure how that
> would interact with the transformations you want to do, but we do lot
> of magic to keep the virtual operands for TARGET_MEM_REFs the same
> as before the transformation (unless that got broken in last few months,
> which unfortunately is pretty likely).

It would be better to annotate things with better alias information
than transform into target specific trees, which none of the other
transformations actually know how to deal with.