*** old/src/share/vm/ci/ciSignature.cpp	Wed Oct 12 04:37:44 2011
--- new/src/share/vm/ci/ciSignature.cpp	Wed Oct 12 04:37:44 2011

*** 78,106 ****
--- 78,124 ----
    _size = size;
    _count = count;
  }
  
  // ------------------------------------------------------------------
! // ciSignature::return_ciType
! // ciSignature::return_type
  //
  // What is the return type of this signature?
  ciType* ciSignature::return_type() const {
    return _types->at(_count);
  }
  
  // ------------------------------------------------------------------
! // ciSignature::ciType_at
! // ciSignature::type_at
  //
  // What is the type of the index'th element of this
  // signature?
  ciType* ciSignature::type_at(int index) const {
    assert(index < _count, "out of bounds");
    // The first _klasses element holds the return klass.
    return _types->at(index);
  }
  
  // ------------------------------------------------------------------
+ // ciSignature::equals
+ //
+ // Compare this signature to another one.  Signatures with different
+ // accessing classes but with signature-types resolved to the same
+ // types are defined to be equal.
+ bool ciSignature::equals(ciSignature* that) {
+   // Compare signature
+   if (!this->as_symbol()->equals(that->as_symbol()))  return false;
+   // Compare all types of the arguments
+   for (int i = 0; i < _count; i++) {
+     if (this->type_at(i) != that->type_at(i))         return false;
+   }
+   // Compare the return type
+   if (this->return_type() != that->return_type())     return false;
+   return true;
+ }
+ 
+ // ------------------------------------------------------------------
  // ciSignature::print_signature
  void ciSignature::print_signature() {
    _symbol->print_symbol();
  }