imemo_ifunc      4421 gc.c           	  case imemo_ifunc:
imemo_ifunc       747 internal.h     #define IFUNC_NEW(a, b, c) ((struct vm_ifunc *)rb_imemo_new(imemo_ifunc, (VALUE)(a), (VALUE)(b), (VALUE)(c), 0))
imemo_ifunc       983 vm_core.h      #define RUBY_VM_IFUNC_P(ptr)        (RB_TYPE_P((VALUE)(ptr), T_IMEMO) && imemo_type((VALUE)ptr) == imemo_ifunc)