[Bug rtl-optimization/88593] [9 Regression] cleanup_cfg may make cached dominance info stale

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88593

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, is this actually a regression?  I.e. is there a testcase that fails with
trunk?