get_assigned_expr_name_sym
expr = get_assigned_expr_name_sym(sm->name, sm->sym);
struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym);
arg = get_assigned_expr_name_sym(data_member, sym);
assigned = get_assigned_expr_name_sym(sym->ident->name, sym);
assigned = get_assigned_expr_name_sym(chunk, sym);
if (get_assigned_expr_name_sym(sm->name, sm->sym))
expr = get_assigned_expr_name_sym(name, sym);