https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85401
--- Comment #4 from Martin Husemann <martin at netbsd dot org> ---
The costs are missing for various modes:
(gdb) p (default_target_ira_int->x_ira_register_move_cost)
$6 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x7f7ff7b8c8b0, 0x7f7ff7b8c8b0, 0x0 <repeats 32
times>}
(that is: only HImode and SImode costs are available)
