src/hotspot/share/opto/subnode.hpp

*** 446,457 ****
--- 446,462 ----
  // square root a float
  class SqrtFNode : public Node {
  public:
    SqrtFNode(Compile* C, Node *c, Node *in1) : Node(c, in1) {
      init_flags(Flag_is_expensive);
+     if (c != NULL) {
+       // Treat node only as expensive if a control input is set because it might
+       // be created from a SqrtDNode in ConvD2FNode::Ideal() that was found to
+       // be unique and therefore has no control input.
        C->add_expensive_node(this);
      }
+   }
    virtual int Opcode() const;
    const Type *bottom_type() const { return Type::FLOAT; }
    virtual uint ideal_reg() const { return Op_RegF; }
    virtual const Type* Value(PhaseGVN* phase) const;
  };