[Bug tree-optimization/91568] internal compiler error: in vect_schedule_slp_instance, at tree-vect-slp.c:3922

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91568

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed on the branch.

internal compiler error: in exact_div, at poly-int.h:2139
0x121020e poly_int<1u, poly_result<unsigned long, if_nonpoly<unsigned long,
unsigned long, poly_int_traits<unsigned long>::is_poly>::type,
poly_coeff_pair_traits<unsigned long, if_nonpoly<unsigned long, unsigned long,
poly_int_traits<unsigned long>::is_poly>::type>::result_kind>::type>
exact_div<1u, unsigned long, unsigned long>(poly_int_pod<1u, unsigned long>
const&, unsigned long)
        /space/rguenther/src/svn/gcc-9-branch/gcc/poly-int.h:2139
0x1210099 poly_int<1u, poly_result<unsigned long, unsigned long,
poly_coeff_pair_traits<unsigned long, unsigned long>::result_kind>::type>
exact_div<1u, unsigned long, unsigned long>(poly_int_pod<1u, unsigned long>
const&, poly_int_pod<1u, unsigned long> const&)
        /space/rguenther/src/svn/gcc-9-branch/gcc/poly-int.h:2152
0x15df0e4 vect_get_num_vectors
        /space/rguenther/src/svn/gcc-9-branch/gcc/tree-vectorizer.h:1338
0x15e6e26 vect_slp_analyze_node_operations_1
        /space/rguenther/src/svn/gcc-9-branch/gcc/tree-vect-slp.c:2522

trunk correctly computes a VF of two while the branch computes one.