[Bug rtl-optimization/81308] [8 regression] ICE in calc_dfs_tree, at dominance.c:458

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81308

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The ICE is because split2 apparently ends up with various unreachable basic
blocks and the checking code attempts to compute dominance info before those
are actually cleaned up.