https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93341
--- Comment #2 from ktkachov at gcc dot gnu.org --- The assert triggering is: enum rtx_code inv_cond_code = reversed_comparison_code (cond, insn); /* We should be able to reverse all conditions. */ gcc_assert (inv_cond_code != UNKNOWN); 865257c447cc50f5819e9b53da83145f3c36c305 had recent changes in that area