https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125809
--- Comment #8 from ptomsich at gcc dot gnu.org --- Nothing we tried on the inliner and the unroller side helps, but the experiments have provided a clearer picture from -fdump-ipa-cp-details: The entire difference comes from how `do_rpo_vn` specialises at `iterate=0`): the devirt bonus now is ~8x in `evaluation` (2011.69 vs. 245.20) and crosses the threshold of 1650. Consequently, the extra clone causes `eliminate_push_avail` to be inlined into `process_bb` twice instead of once. The extra copy's live values make IRA spill a loop-carried counter.
