[tree-ssa] RFC: Dropping INDIRECT_REF variables

[Daniel Berlin]

>>
>
> All you were doing were taking unaliased dereferences, and replacing
> them with a variable. It was basically a simple expression replacement
> based on a single simple case... a dereference of a memory location 
> that
> wasn't alasied with anything.
>
> I find it hard to beleive that this isn't going to be caught by some
> other optimization that handles expressions and looks at loads and
> stores.
>

This is the job of SSAPRE load PRE.
As I said, as long as i have the PTA/alias info, i can do the right 
thing.

> Andrew
>