[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 #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
int
foo (int x)
{
  return x ? __builtin_ctz (x) : 32;
}
works without conditionals just fine for me, both in 8.x and trunk, both C and
C++, both -O2 and -O3.