* tree-flow.h (referenced_var): Move define ...
* tree-flow-inline.h (referenced_var): ... here as an inline
function. Assert here ...
* tree-dfa.c (referenced_var_lookup): ... instead of here.
* tree-ssa.c (maybe_optimize_var): Check if the variable
is in referenced vars.
(execute_update_addresses_taken): Remove old broken check.
* gimple-pretty-print.c (pp_points_to_solution): Use
referenced_var_lookup.
* tree-into-ssa.c (dump_decl_set): Likewise.