[Bug target/68647] __builtin_popcountll doesn't generate popcnt instructions when targeting -mpopcnt on x86_32

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68647

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I also wonder when we have expand_doubleword_clz if we couldn't handle
expand_doubleword_ctz similarly.