Problem in compress_expand_identity

SonarCloud reports: "code will never be executed" in compress_expand_identity

Node* compress_expand_identity(PhaseGVN* phase, Node* n) {
  BasicType bt = n->bottom_type()->basic_type();
  // compress(x, 0) == 0, expand(x, 0) == 0
  if(phase->type(n->in(2))->higher_equal(TypeInteger::zero(bt))) return n->in(2);
  // compress(x, -1) == x, expand(x, -1) == x
  if(phase->type(n->in(2))->higher_equal(TypeInteger::minus_1(bt))) return n->in(1);
  return n;
  // DEAD CODE FOLLOWS:
  // expand(-1, x) == x
  if(n->Opcode() == Op_ExpandBits &&
     phase->type(n->in(1))->higher_equal(TypeInteger::minus_1(bt))) return n->in(2);
  return n;
}

Note how "return n" is unconditional, which makes the rest of the code dead.