Improved printing of a few Hydrogen instructions.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
===================================================================
--- src/hydrogen-instructions.h	(revision 9412)
+++ src/hydrogen-instructions.h	(working copy)
@@ -1978,6 +1978,8 @@
     return new HCheckInstanceType(value, IS_SYMBOL);
   }
 
+  virtual void PrintDataTo(StringStream* stream);
+
   virtual Representation RequiredInputRepresentation(int index) const {
     return Representation::Tagged();
   }
@@ -2008,6 +2010,8 @@
     LAST_INTERVAL_CHECK = IS_JS_ARRAY
   };
 
+  const char* GetCheckName();
+
   HCheckInstanceType(HValue* value, Check check)
       : HUnaryOperation(value), check_(check) {
     set_representation(Representation::Tagged());
@@ -2623,6 +2627,8 @@
   HValue* left() { return OperandAt(0); }
   HValue* right() { return OperandAt(1); }
 
+  virtual void PrintDataTo(StringStream* stream);
+
   virtual Representation RequiredInputRepresentation(int index) const {
     return Representation::Tagged();
   }
@@ -2662,6 +2668,8 @@
   EqualityKind kind() const { return kind_; }
   NilValue nil() const { return nil_; }
 
+  virtual void PrintDataTo(StringStream* stream);
+
   virtual Representation RequiredInputRepresentation(int index) const {
     return Representation::Tagged();
   }
@@ -4129,6 +4137,8 @@
   HValue* context() { return OperandAt(0); }
   HValue* value() { return OperandAt(1); }
 
+  virtual void PrintDataTo(StringStream* stream);
+
   virtual Representation RequiredInputRepresentation(int index) const {
     return Representation::Tagged();
   }