https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98815
--- Comment #2 from Feng Xue <fxue at os dot amperecomputing.com> ---
If we step into free_dominance_info(dir), it is a wrapper of
free_dominance_info (cfun, dir), which means it assumes a non-NULL "cfun".
Additionally, please go through calling stack of free_dominance_info():
free_dominance_info ()
-> if (!dom_info_available_p ())
-> dom_info_state (fn, dir) != DOM_NONE
-> if (!fn->cfg)
return DOM_NONE;
This shows when "fn->cfg" is NULL, free_dominance_info() does nothing.
Above all, if conditional check "cfun && fn->cfg" is true, two calls to
free_dominance_info() in cgraph_node::analyze() are redundant, and if the check
is false, these calls are trival. So we could remove those calls in
cgraph_node::analyze(), not execute_pass_list().
