https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93372
--- Comment #3 from Hans-Peter Nilsson <hp at gcc dot gnu.org> --- In https://gcc.gnu.org/pipermail/gcc-patches/2020-May/545452.html I mentioned a performance-regression with coremark, from 5227456 cycles (with cc0) to 5238564 (CC_REG), which is about 0.21%.