https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66295
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> --- There's one follow-up issue I forgot to fix: $ gcc pr78419.c -fprofile-generate -O2 -g && ./a.out && gcc -fprofile-use -O2 pr78419.c -fdump-ipa-profile-details pr78419.c:34:1: internal compiler error: in initialize_node_lattices, at ipa-cp.c:1151 } ^ 0x16cb656 initialize_node_lattices ../../gcc/ipa-cp.c:1151 0x16cb656 ipcp_propagate_stage ../../gcc/ipa-cp.c:3251 0x16cc946 ipcp_driver ../../gcc/ipa-cp.c:4996 0x16cc946 execute ../../gcc/ipa-cp.c:5090 I've got patch for that.