https://github.com/openjdk/jdk/blob/master/src/hotspot/cpu/aarch64/aarch64.ad#L2342
void MachUEPNode::emit(CodeBuffer& cbuf, PhaseRegAlloc* ra_) const
{
  // This is the unverified entry point.
  C2_MacroAssembler _masm(&cbuf);

  __ cmp_klass(j_rarg0, rscratch2, rscratch1);
  Label skip;
  // TODO
  // can we avoid this skip and still use a reloc?
  __ br(Assembler::EQ, skip);
  __ far_jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub()));
  __ bind(skip);
}

We can optimize BR+FAR_JUMP into BR when we know FAR_JUMP is B.