[Bug tree-optimization/71824] [6/7 Regression] ICE when compiling libiberty with Graphite loop optimizations

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71824

--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
Full back-trace:

0x1307b83 add_loop_constraints
        ../../gcc/graphite-sese-to-poly.c:933
0x1307c7b build_iteration_domains
        ../../gcc/graphite-sese-to-poly.c:1001
0x1307d0a build_iteration_domains
        ../../gcc/graphite-sese-to-poly.c:1040
0x13084ef build_poly_scop(scop*)
        ../../gcc/graphite-sese-to-poly.c:1364
0x12f2758 graphite_transform_loops()
        ../../gcc/graphite.c:319
0x12f2d00 graphite_transforms
        ../../gcc/graphite.c:356
0x12f2d00 execute
        ../../gcc/graphite.c:433