size_t hash = hash_freq_2level_ptr (&c, bar);
HMAP_FOR_EACH_WITH_HASH (foo, struct freq, node, hash, &level2table)
{
if (0 == compare_freq_2level_ptr_3way (&foo, &c, bar))
{
foo->count += c->count;
size_t hash = hash_freq_2level_ptr (&c, bar);
HMAP_FOR_EACH_WITH_HASH (foo, struct freq, node, hash, &level2table)
{
if (0 == compare_freq_2level_ptr_3way (&foo, &c, bar))
{
foo->count += c->count;