https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118560
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- And self-recursion isn't really needed, even struct { _Decimal32 a; } b; void foo (int, _Decimal32); void bar (int, _Decimal32 d) { foo (1, 1); b.a = d; } takes 1700x as long as before.