Add support for equality comparison of CallSite's.

llvm-svn: 49616

include/llvm/Support/CallSite.h

@@ -39,6 +39,9 @@ public:
   CallSite(const CallSite &CS) : I(CS.I) {}
   CallSite &operator=(const CallSite &CS) { I = CS.I; return *this; }
 
+  bool operator==(const CallSite &CS) const { return I == CS.I; }
+  bool operator!=(const CallSite &CS) const { return I != CS.I; }
+  
   /// CallSite::get - This static method is sort of like a constructor.  It will
   /// create an appropriate call site for a Call or Invoke instruction, but it
   /// can also create a null initialized CallSite object for something which is