diff --git a/Eigen/src/Core/GeneralProduct.h b/Eigen/src/Core/GeneralProduct.h
index c37526b72..f28d2e46c 100644
--- a/Eigen/src/Core/GeneralProduct.h
+++ b/Eigen/src/Core/GeneralProduct.h
@@ -353,10 +353,13 @@ template<typename Lhs, typename Rhs>
 struct traits<GeneralProduct<Lhs,Rhs,GemvProduct> >
  : traits<ProductBase<GeneralProduct<Lhs,Rhs,GemvProduct>, Lhs, Rhs> >
 {};
-#endif
-
 template<int Side, int StorageOrder, bool BlasCompatible>
 struct gemv_selector;
+#endif
+#ifdef EIGEN_ENABLE_EVALUATORS
+template<int Side, int StorageOrder, bool BlasCompatible>
+struct gemv_dense_sense_selector;
+#endif
 
 } // end namespace internal
 
@@ -594,23 +597,25 @@ template<> struct gemv_selector<OnTheRight,RowMajor,false>
   }
 };
 
-#else // EIGEN_TEST_EVALUATORS
+#endif // EIGEN_TEST_EVALUATORS
+
+#ifdef EIGEN_ENABLE_EVALUATORS
 
 // The vector is on the left => transposition
 template<int StorageOrder, bool BlasCompatible>
-struct gemv_selector<OnTheLeft,StorageOrder,BlasCompatible>
+struct gemv_dense_sense_selector<OnTheLeft,StorageOrder,BlasCompatible>
 {
   template<typename Lhs, typename Rhs, typename Dest>
   static void run(const Lhs &lhs, const Rhs &rhs, Dest& dest, const typename Dest::Scalar& alpha)
   {
     Transpose<Dest> destT(dest);
     enum { OtherStorageOrder = StorageOrder == RowMajor ? ColMajor : RowMajor };
-    gemv_selector<OnTheRight,OtherStorageOrder,BlasCompatible>
+    gemv_dense_sense_selector<OnTheRight,OtherStorageOrder,BlasCompatible>
       ::run(rhs.transpose(), lhs.transpose(), destT, alpha);
   }
 };
 
-template<> struct gemv_selector<OnTheRight,ColMajor,true>
+template<> struct gemv_dense_sense_selector<OnTheRight,ColMajor,true>
 {
   template<typename Lhs, typename Rhs, typename Dest>
   static inline void run(const Lhs &lhs, const Rhs &rhs, Dest& dest, const typename Dest::Scalar& alpha)
@@ -685,7 +690,7 @@ template<> struct gemv_selector<OnTheRight,ColMajor,true>
   }
 };
 
-template<> struct gemv_selector<OnTheRight,RowMajor,true>
+template<> struct gemv_dense_sense_selector<OnTheRight,RowMajor,true>
 {
   template<typename Lhs, typename Rhs, typename Dest>
   static void run(const Lhs &lhs, const Rhs &rhs, Dest& dest, const typename Dest::Scalar& alpha)
@@ -737,7 +742,7 @@ template<> struct gemv_selector<OnTheRight,RowMajor,true>
   }
 };
 
-template<> struct gemv_selector<OnTheRight,ColMajor,false>
+template<> struct gemv_dense_sense_selector<OnTheRight,ColMajor,false>
 {
   template<typename Lhs, typename Rhs, typename Dest>
   static void run(const Lhs &lhs, const Rhs &rhs, Dest& dest, const typename Dest::Scalar& alpha)
@@ -750,7 +755,7 @@ template<> struct gemv_selector<OnTheRight,ColMajor,false>
   }
 };
 
-template<> struct gemv_selector<OnTheRight,RowMajor,false>
+template<> struct gemv_dense_sense_selector<OnTheRight,RowMajor,false>
 {
   template<typename Lhs, typename Rhs, typename Dest>
   static void run(const Lhs &lhs, const Rhs &rhs, Dest& dest, const typename Dest::Scalar& alpha)
@@ -763,7 +768,7 @@ template<> struct gemv_selector<OnTheRight,RowMajor,false>
   }
 };
 
-#endif // EIGEN_TEST_EVALUATORS
+#endif // EIGEN_ENABLE_EVALUATORS
 
 } // end namespace internal
 
diff --git a/Eigen/src/Core/ProductEvaluators.h b/Eigen/src/Core/ProductEvaluators.h
index 186ae4a34..b16b86d8f 100644
--- a/Eigen/src/Core/ProductEvaluators.h
+++ b/Eigen/src/Core/ProductEvaluators.h
@@ -304,7 +304,7 @@ struct generic_product_impl<Lhs,Rhs,DenseShape,DenseShape,GemvProduct>
   template<typename Dest>
   static void scaleAndAddTo(Dest& dst, const Lhs& lhs, const Rhs& rhs, const Scalar& alpha)
   {
-    internal::gemv_selector<Side,
+    internal::gemv_dense_sense_selector<Side,
                             (int(MatrixType::Flags)&RowMajorBit) ? RowMajor : ColMajor,
                             bool(internal::blas_traits<MatrixType>::HasUsableDirectAccess)
                            >::run(lhs, rhs, dst, alpha);
diff --git a/Eigen/src/Core/products/GeneralMatrixMatrix.h b/Eigen/src/Core/products/GeneralMatrixMatrix.h
index 1c8940e1c..1726f98ed 100644
--- a/Eigen/src/Core/products/GeneralMatrixMatrix.h
+++ b/Eigen/src/Core/products/GeneralMatrixMatrix.h
@@ -422,7 +422,9 @@ class GeneralProduct<Lhs, Rhs, GemmProduct>
       internal::parallelize_gemm<(Dest::MaxRowsAtCompileTime>32 || Dest::MaxRowsAtCompileTime==Dynamic)>(GemmFunctor(lhs, rhs, dst, actualAlpha, blocking), this->rows(), this->cols(), Dest::Flags&RowMajorBit);
     }
 };
-#else // EIGEN_TEST_EVALUATORS
+#endif // EIGEN_TEST_EVALUATORS
+
+#ifdef EIGEN_ENABLE_EVALUATORS
 namespace internal {
   
 template<typename Lhs, typename Rhs>
@@ -477,7 +479,7 @@ struct generic_product_impl<Lhs,Rhs,DenseShape,DenseShape,GemmProduct>
 };
 
 } // end namespace internal
-#endif // EIGEN_TEST_EVALUATORS
+#endif // EIGEN_ENABLE_EVALUATORS
 
 } // end namespace Eigen
 
diff --git a/Eigen/src/Core/products/SelfadjointMatrixMatrix.h b/Eigen/src/Core/products/SelfadjointMatrixMatrix.h
index f252aef85..afa8af43c 100644
--- a/Eigen/src/Core/products/SelfadjointMatrixMatrix.h
+++ b/Eigen/src/Core/products/SelfadjointMatrixMatrix.h
@@ -431,7 +431,8 @@ struct SelfadjointProductMatrix<Lhs,LhsMode,false,Rhs,RhsMode,false>
       );
   }
 };
-#else // EIGEN_TEST_EVALUATORS
+#endif // EIGEN_TEST_EVALUATORS
+#ifdef EIGEN_ENABLE_EVALUATORS
 namespace internal {
   
 template<typename Lhs, int LhsMode, typename Rhs, int RhsMode>
@@ -481,7 +482,7 @@ struct selfadjoint_product_impl<Lhs,LhsMode,false,Rhs,RhsMode,false>
 
 } // end namespace internal
 
-#endif
+#endif // EIGEN_ENABLE_EVALUATORS
 
 } // end namespace Eigen
 
diff --git a/Eigen/src/Core/products/TriangularMatrixMatrix.h b/Eigen/src/Core/products/TriangularMatrixMatrix.h
index e654b45b1..3f0618410 100644
--- a/Eigen/src/Core/products/TriangularMatrixMatrix.h
+++ b/Eigen/src/Core/products/TriangularMatrixMatrix.h
@@ -421,7 +421,8 @@ struct TriangularProduct<Mode,LhsIsTriangular,Lhs,false,Rhs,false>
       );
   }
 };
-#else // EIGEN_TEST_EVALUATORS
+#endif // EIGEN_TEST_EVALUATORS
+#ifdef EIGEN_ENABLE_EVALUATORS
 namespace internal {
 template<int Mode, bool LhsIsTriangular, typename Lhs, typename Rhs>
 struct triangular_product_impl<Mode,LhsIsTriangular,Lhs,false,Rhs,false>
@@ -471,7 +472,7 @@ struct triangular_product_impl<Mode,LhsIsTriangular,Lhs,false,Rhs,false>
 };
 
 } // end namespace internal
-#endif // EIGEN_TEST_EVALUATORS
+#endif // EIGEN_ENABLE_EVALUATORS
 
 } // end namespace Eigen
 
diff --git a/Eigen/src/Core/util/XprHelper.h b/Eigen/src/Core/util/XprHelper.h
index 76e979ba0..a4baa921c 100644
--- a/Eigen/src/Core/util/XprHelper.h
+++ b/Eigen/src/Core/util/XprHelper.h
@@ -293,44 +293,10 @@ struct transfer_constness
   >::type type;
 };
 
-#ifdef EIGEN_TEST_EVALUATORS
 
-// When using evaluators, we never evaluate when assembling the expression!!
-// TODO: get rid of this nested class since it's just an alias for ref_selector.
-template<typename T, int n=1, typename PlainObject = typename eval<T>::type> struct nested
-{
-  typedef typename ref_selector<T>::type type;
-};
 
-// However, we still need a mechanism to detect whether an expression which is evaluated multiple time
-// has to be evaluated into a temporary.
-// That's the purpose of this new nested_eval helper: 
-template<typename T, int n, typename PlainObject = typename eval<T>::type> struct nested_eval
-{
-  enum {
-    // For the purpose of this test, to keep it reasonably simple, we arbitrarily choose a value of Dynamic values.
-    // the choice of 10000 makes it larger than any practical fixed value and even most dynamic values.
-    // in extreme cases where these assumptions would be wrong, we would still at worst suffer performance issues
-    // (poor choice of temporaries).
-    // It's important that this value can still be squared without integer overflowing.
-    DynamicAsInteger = 10000,
-    ScalarReadCost = NumTraits<typename traits<T>::Scalar>::ReadCost,
-    ScalarReadCostAsInteger = ScalarReadCost == Dynamic ? int(DynamicAsInteger) : int(ScalarReadCost),
-    CoeffReadCost = traits<T>::CoeffReadCost,
-    CoeffReadCostAsInteger = CoeffReadCost == Dynamic ? int(DynamicAsInteger) : int(CoeffReadCost),
-    NAsInteger = n == Dynamic ? int(DynamicAsInteger) : n,
-    CostEvalAsInteger   = (NAsInteger+1) * ScalarReadCostAsInteger + CoeffReadCostAsInteger,
-    CostNoEvalAsInteger = NAsInteger * CoeffReadCostAsInteger
-  };
+#ifndef EIGEN_TEST_EVALUATORS
 
-  typedef typename conditional<
-        int(CostEvalAsInteger) < int(CostNoEvalAsInteger),
-        PlainObject,
-        typename ref_selector<T>::type
-  >::type type;
-};
-
-#else
 /** \internal Determines how a given expression should be nested into another one.
   * For example, when you do a * (b+c), Eigen will determine how the expression b+c should be
   * nested into the bigger product expression. The choice is between nesting the expression b+c as-is, or
@@ -377,8 +343,48 @@ template<typename T, int n=1, typename PlainObject = typename eval<T>::type> str
       typename ref_selector<T>::type
   >::type type;
 };
+
+#else
+
+// When using evaluators, we never evaluate when assembling the expression!!
+// TODO: get rid of this nested class since it's just an alias for ref_selector.
+template<typename T, int n=1, typename PlainObject = typename eval<T>::type> struct nested
+{
+  typedef typename ref_selector<T>::type type;
+};
+
 #endif // EIGEN_TEST_EVALUATORS
 
+#ifdef EIGEN_ENABLE_EVALUATORS
+// However, we still need a mechanism to detect whether an expression which is evaluated multiple time
+// has to be evaluated into a temporary.
+// That's the purpose of this new nested_eval helper: 
+template<typename T, int n, typename PlainObject = typename eval<T>::type> struct nested_eval
+{
+  enum {
+    // For the purpose of this test, to keep it reasonably simple, we arbitrarily choose a value of Dynamic values.
+    // the choice of 10000 makes it larger than any practical fixed value and even most dynamic values.
+    // in extreme cases where these assumptions would be wrong, we would still at worst suffer performance issues
+    // (poor choice of temporaries).
+    // It's important that this value can still be squared without integer overflowing.
+    DynamicAsInteger = 10000,
+    ScalarReadCost = NumTraits<typename traits<T>::Scalar>::ReadCost,
+    ScalarReadCostAsInteger = ScalarReadCost == Dynamic ? int(DynamicAsInteger) : int(ScalarReadCost),
+    CoeffReadCost = traits<T>::CoeffReadCost,
+    CoeffReadCostAsInteger = CoeffReadCost == Dynamic ? int(DynamicAsInteger) : int(CoeffReadCost),
+    NAsInteger = n == Dynamic ? int(DynamicAsInteger) : n,
+    CostEvalAsInteger   = (NAsInteger+1) * ScalarReadCostAsInteger + CoeffReadCostAsInteger,
+    CostNoEvalAsInteger = NAsInteger * CoeffReadCostAsInteger
+  };
+
+  typedef typename conditional<
+        int(CostEvalAsInteger) < int(CostNoEvalAsInteger),
+        PlainObject,
+        typename ref_selector<T>::type
+  >::type type;
+};
+#endif
+
 template<typename T>
 EIGEN_DEVICE_FUNC
 T* const_cast_ptr(const T* ptr)