[Bug c/89670] __builtin_ctz(_mm256_movemask_epi8(foo)) assumed to be <31 ?

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89670

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Jörn Engel from comment #4)
> Fair enough.  That means the only way to get tzcnt without a conditional is
> by using inline asm.

Of course not.
Either you can use _tzcnt_u32, or you can use x ? __builtin_ctz (x) : 32, both
with with -mbmi expand to tzcnt when optimizing.