https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91654
--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> --- Change cost from 2->6 got ------------- 531.deepsjeng_r 9.64% 548.exchange_r 10.24% 557.xc_r 7.99% 508.namd_r 1.08% 527.cam4_r 6.91% 553.nab_r 3.06% ------------ for 531,548,557,527, even better comparing to version before regression. for 508,533, still little regressions comparing to version before regression.