[lto] function to DECL associations for WPA repackaging

[Diego Novillo]

On 2008-06-12, Richard Guenther <richard.guenther@gmail.com> wrote:

> Yes.  The referenced_vars hashtable is filled by the referenced_vars pass
>  (see tree-dfa.c:find_referenced_vars).

Right, that's why Ken's reference to pass_ipa_reference() confused me.
 find_referenced_vars() is probably the oldest and simplest pass we
have in the whole pipeline.

Diego.