https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77318
--- Comment #6 from Tom de Vries <vries at gcc dot gnu.org> ---
In extract_affine_chrec we have:
...
unsigned pos = sese_loop_depth (s->scop_info->region, get_chrec_loop (e)) -
1;
isl_aff *loop = isl_aff_set_coefficient_si
(isl_aff_zero_on_domain (ls), isl_dim_in, pos, 1);
...
The immediate cause of the ICE is that sese_loop_depth returns 0, so pos ends
up with value UINT_MAX. This causes the out-of-bounds error during the call to
isl_aff_set_coefficient_si.
