https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63795
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- One of the many fall out of the IPA_ICF commit: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63622#c7. The ICE disappears if you compile with -fno-ipa-icf.