RUBY_VM_IFUNC_P    51 proc.c             (RUBY_VM_IFUNC_P(iseq) && \
RUBY_VM_IFUNC_P    63 proc.c             if (proc->block.iseq && RUBY_VM_IFUNC_P(proc->block.iseq)) {
RUBY_VM_IFUNC_P   788 proc.c             if (RUBY_VM_IFUNC_P(iseq) || iseq->body->param.flags.has_block) {
RUBY_VM_IFUNC_P   996 proc.c             if (RUBY_VM_IFUNC_P(iseq)) {
RUBY_VM_IFUNC_P  2675 proc.c             if (RUBY_VM_IFUNC_P(iseq)) {
RUBY_VM_IFUNC_P    41 vm_dump.c          if (cfp->block_iseq != 0 && !RUBY_VM_IFUNC_P(cfp->block_iseq)) {
RUBY_VM_IFUNC_P    98 vm_dump.c      	if (RUBY_VM_IFUNC_P(cfp->iseq)) {
RUBY_VM_IFUNC_P  2305 vm_insnhelper.c     if (!RUBY_VM_IFUNC_P(block->proc) && !SYMBOL_P(block->proc) &&