https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124630
Drea Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2026-04-16
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #2 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.
>+/* popcount (X ^ (X - 1)) - 1 is CTZ (X) when X is nonzero. */
Most likely it is better to do:
popcount (X ^ (X - 1)) -> CTZ (X) + 1
And allow the `+ 1 - 1` cancel each other out. Plus Someone might just write
the popcount without the -1 on the end.
