https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113592
--- Comment #3 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
This testcase is probably not a good example for typical partail sum which
relies on unroll loops.
double
foo (double* p, int n)
{
double sum = 0;
for (int i = 0; i != n; i++)
sum += p[i] * p[i];
return sum;
}
This should be better, vectorizer can do unroll + partial_sum itselves.
