https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64817
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Alex mentioned this is related to PR48866 and it is also related to PR56510. Since the latter, we actually break too complex debug insn expressions into simpler ones (with maximum depth of 4), and it would do its job in this case too, but the problem is that already the simplify_gen_* has the undesirable complexity on the expressions.
