[vector] Fix MulReductionVLNode::ideal_reg()

[Vladimir Ivanov]

Wrong ideal register is specified for MulReductionVL.

diff --git a/src/hotspot/share/opto/vectornode.hpp 
b/src/hotspot/share/opto/vectornode.hpp
--- a/src/hotspot/share/opto/vectornode.hpp
+++ b/src/hotspot/share/opto/vectornode.hpp
@@ -386,7 +386,7 @@
    MulReductionVLNode(Node *ctrl, Node* in1, Node* in2) : 
ReductionNode(ctrl, in1, in2) {}
    virtual int Opcode() const;
    virtual const Type* bottom_type() const { return TypeLong::LONG; }
-  virtual uint ideal_reg() const { return Op_RegI; }
+  virtual uint ideal_reg() const { return Op_RegL; }
  };

Thanks!

Best regards,
Vladimir Ivanov