diff --git a/Eigen/src/Core/AssignEvaluator.h b/Eigen/src/Core/AssignEvaluator.h
index 97938fdba..b0468dd64 100644
--- a/Eigen/src/Core/AssignEvaluator.h
+++ b/Eigen/src/Core/AssignEvaluator.h
@@ -480,7 +480,7 @@ struct dense_assignment_loop<Kernel, SliceVectorizedTraversal, NoUnrolling>
       dstAlignment = alignable ? Aligned : int(dstIsAligned)
     };
     const Scalar *dst_ptr = &kernel.dstEvaluator().coeffRef(0,0);
-    if((!bool(dstIsAligned)) && (Index(dst_ptr) % sizeof(Scalar))>0)
+    if((!bool(dstIsAligned)) && (size_t(dst_ptr) % sizeof(Scalar))>0)
     {
       // the pointer is not aligend-on scalar, so alignment is not possible
       return dense_assignment_loop<Kernel,DefaultTraversal,NoUnrolling>::run(kernel);
diff --git a/blas/level3_impl.h b/blas/level3_impl.h
index b3b727675..563101dfc 100644
--- a/blas/level3_impl.h
+++ b/blas/level3_impl.h
@@ -50,12 +50,18 @@ int EIGEN_BLAS_FUNC(gemm)(char *opa, char *opb, int *m, int *n, int *k, RealScal
   if(info)
     return xerbla_(SCALAR_SUFFIX_UP"GEMM ",&info,6);
 
+  if (*m == 0 || *n == 0)
+    return 0;
+
   if(beta!=Scalar(1))
   {
     if(beta==Scalar(0)) matrix(c, *m, *n, *ldc).setZero();
     else                matrix(c, *m, *n, *ldc) *= beta;
   }
 
+  if(*k == 0)
+    return 0;
+
   internal::gemm_blocking_space<ColMajor,Scalar,Scalar,Dynamic,Dynamic,Dynamic> blocking(*m,*n,*k,1,true);
 
   int code = OP(*opa) | (OP(*opb) << 2);
diff --git a/unsupported/Eigen/AlignedVector3 b/unsupported/Eigen/AlignedVector3
index 1fce00525..93b017437 100644
--- a/unsupported/Eigen/AlignedVector3
+++ b/unsupported/Eigen/AlignedVector3
@@ -193,6 +193,12 @@ template<typename _Scalar> class AlignedVector3
 
 namespace internal {
 
+template<typename _Scalar>
+struct eval<AlignedVector3<_Scalar>, Dense>
+{
+ typedef const AlignedVector3<_Scalar>& type;
+};
+
 template<typename Scalar>
 struct evaluator<AlignedVector3<Scalar> >
   : evaluator<Matrix<Scalar,4,1> >::type
diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h b/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h
index 165bd8a89..ca712f9c5 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h
@@ -492,6 +492,7 @@ class TensorBase<Derived, ReadOnlyAccessors>
 
   protected:
     template <typename Scalar, std::size_t NumIndices, int Options, typename IndexType> friend class Tensor;
+   template <typename Scalar, typename Dimensions, int Option, typename IndexTypes> friend class TensorFixedSize;
     template <typename OtherDerived, int AccessLevel> friend class TensorBase;
     EIGEN_DEVICE_FUNC
     EIGEN_STRONG_INLINE const Derived& derived() const { return *static_cast<const Derived*>(this); }
@@ -508,6 +509,7 @@ class TensorBase<Derived, WriteAccessors> : public TensorBase<Derived, ReadOnlyA
     static const int NumDimensions = DerivedTraits::NumDimensions;
 
     template <typename Scalar, std::size_t NumIndices, int Options, typename IndexType> friend class Tensor;
+    template <typename Scalar, typename Dimensions, int Option, typename IndexTypes> friend class TensorFixedSize;
     template <typename OtherDerived, int AccessLevel> friend class TensorBase;
 
     EIGEN_DEVICE_FUNC
diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorFixedSize.h b/unsupported/Eigen/CXX11/src/Tensor/TensorFixedSize.h
index 76998b690..5e511dc4b 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorFixedSize.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorFixedSize.h
@@ -197,6 +197,23 @@ class TensorFixedSize : public TensorBase<TensorFixedSize<Scalar_, Dimensions_,
     }
 #endif
 
+    template<typename OtherDerived>
+    EIGEN_DEVICE_FUNC
+    EIGEN_STRONG_INLINE TensorFixedSize(const TensorBase<OtherDerived, ReadOnlyAccessors>& other)
+    {
+      typedef TensorAssignOp<TensorFixedSize, const OtherDerived> Assign;
+      Assign assign(*this, other.derived());
+      internal::TensorExecutor<const Assign, DefaultDevice>::run(assign, DefaultDevice());
+    }
+    template<typename OtherDerived>
+    EIGEN_DEVICE_FUNC
+    EIGEN_STRONG_INLINE TensorFixedSize(const TensorBase<OtherDerived, WriteAccessors>& other)
+    {
+      typedef TensorAssignOp<TensorFixedSize, const OtherDerived> Assign;
+      Assign assign(*this, other.derived());
+      internal::TensorExecutor<const Assign, DefaultDevice>::run(assign, DefaultDevice());
+    }
+
     EIGEN_DEVICE_FUNC
     EIGEN_STRONG_INLINE TensorFixedSize& operator=(const TensorFixedSize& other)
     {
diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorIntDiv.h b/unsupported/Eigen/CXX11/src/Tensor/TensorIntDiv.h
index 4c5e784c9..47fefff92 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorIntDiv.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorIntDiv.h
@@ -62,8 +62,11 @@ struct TensorIntDivisor {
 
     // fast ln2
     const int leading_zeros = count_leading_zeros(divider);
-    const int log_div = N - (leading_zeros+1);
-
+    int log_div = N - leading_zeros;
+    // If divider is a power of two then log_div is 1 more than it should be.
+    if ((1ull << (log_div-1)) == divider) {
+      log_div--;
+    }
     multiplier = (static_cast<uint64_t>(1) << (N+log_div)) / divider - (static_cast<uint64_t>(1) << N) + 1;
     shift1 = log_div > 1 ? 1 : log_div;
     shift2 = log_div > 1 ? log_div-1 : 0;
diff --git a/unsupported/test/alignedvector3.cpp b/unsupported/test/alignedvector3.cpp
index 0e6226ad3..911996413 100644
--- a/unsupported/test/alignedvector3.cpp
+++ b/unsupported/test/alignedvector3.cpp
@@ -59,6 +59,11 @@ void alignedvector3()
   f2.normalize();
   r2.normalize();
   VERIFY_IS_APPROX(f2,r2);
+  
+  std::stringstream ss1, ss2;
+  ss1 << f1;
+  ss2 << r1;
+  VERIFY(ss1.str()==ss2.str());
 }
 
 void test_alignedvector3()
diff --git a/unsupported/test/cxx11_tensor_fixed_size.cpp b/unsupported/test/cxx11_tensor_fixed_size.cpp
index 8a27f5ad8..5252e4d72 100644
--- a/unsupported/test/cxx11_tensor_fixed_size.cpp
+++ b/unsupported/test/cxx11_tensor_fixed_size.cpp
@@ -31,12 +31,20 @@ static void test_1d()
   vec1(4) = 23.0; vec2(4) = 4.0;
   vec1(5) = 42.0; vec2(5) = 5.0;
 
-  float data3[6];
-  TensorMap<TensorFixedSize<float, Sizes<6> > > vec3(data3, 6);
-  vec3 = vec1.sqrt();
-  float data4[6];
-  TensorMap<TensorFixedSize<float, Sizes<6>, RowMajor> > vec4(data4, 6);
-  vec4 = vec2.sqrt();
+  // Test against shallow copy.
+  TensorFixedSize<float, Sizes<6> > copy = vec1;
+  VERIFY_IS_NOT_EQUAL(vec1.data(), copy.data());
+  for (int i = 0; i < 6; ++i) {
+    VERIFY_IS_APPROX(vec1(i), copy(i));
+  }
+  copy = vec1;
+  VERIFY_IS_NOT_EQUAL(vec1.data(), copy.data());
+  for (int i = 0; i < 6; ++i) {
+    VERIFY_IS_APPROX(vec1(i), copy(i));
+  }
+
+  TensorFixedSize<float, Sizes<6> > vec3 = vec1.sqrt();
+  TensorFixedSize<float, Sizes<6>, RowMajor> vec4 = vec2.sqrt();
 
   VERIFY_IS_EQUAL((vec3.size()), 6);
   VERIFY_IS_EQUAL(vec3.rank(), 1);
@@ -66,6 +74,30 @@ static void test_1d()
   VERIFY_IS_APPROX(vec3(5), 42.0f + 5.0f);
 }
 
+static void test_tensor_map()
+{
+  TensorFixedSize<float, Sizes<6> > vec1;
+  TensorFixedSize<float, Sizes<6>, RowMajor> vec2;
+
+  vec1(0) = 4.0;  vec2(0) = 0.0;
+  vec1(1) = 8.0;  vec2(1) = 1.0;
+  vec1(2) = 15.0; vec2(2) = 2.0;
+  vec1(3) = 16.0; vec2(3) = 3.0;
+  vec1(4) = 23.0; vec2(4) = 4.0;
+  vec1(5) = 42.0; vec2(5) = 5.0;
+
+  float data3[6];
+  TensorMap<TensorFixedSize<float, Sizes<6> > > vec3(data3, 6);
+  vec3 = vec1.sqrt() + vec2;
+
+  VERIFY_IS_APPROX(vec3(0), sqrtf(4.0));
+  VERIFY_IS_APPROX(vec3(1), sqrtf(8.0) + 1.0f);
+  VERIFY_IS_APPROX(vec3(2), sqrtf(15.0) + 2.0f);
+  VERIFY_IS_APPROX(vec3(3), sqrtf(16.0) + 3.0f);
+  VERIFY_IS_APPROX(vec3(4), sqrtf(23.0) + 4.0f);
+  VERIFY_IS_APPROX(vec3(5), sqrtf(42.0) + 5.0f);
+}
+
 static void test_2d()
 {
   float data1[6];
@@ -192,6 +224,7 @@ static void test_array()
 void test_cxx11_tensor_fixed_size()
 {
   CALL_SUBTEST(test_1d());
+  CALL_SUBTEST(test_tensor_map());
   CALL_SUBTEST(test_2d());
   CALL_SUBTEST(test_3d());
   CALL_SUBTEST(test_array());
diff --git a/unsupported/test/cxx11_tensor_intdiv.cpp b/unsupported/test/cxx11_tensor_intdiv.cpp
index a50356c74..134329034 100644
--- a/unsupported/test/cxx11_tensor_intdiv.cpp
+++ b/unsupported/test/cxx11_tensor_intdiv.cpp
@@ -68,10 +68,23 @@ void test_unsigned_64bit()
 }
 
 
+void test_specific()
+{
+  // A particular combination that exposed a bug in the past.
+  int64_t div = 209715200;
+  int64_t num = 3238002688;
+  Eigen::internal::TensorIntDivisor<int64_t> divider =
+      Eigen::internal::TensorIntDivisor<int64_t>(div);
+  int64_t result = num/div;
+  int64_t result_op = divider.divide(num);
+  VERIFY_IS_EQUAL(result, result_op);
+}
+
 void test_cxx11_tensor_intdiv()
 {
   CALL_SUBTEST_1(test_signed_32bit());
   CALL_SUBTEST_2(test_unsigned_32bit());
   CALL_SUBTEST_3(test_signed_64bit());
   CALL_SUBTEST_4(test_unsigned_64bit());
+  CALL_SUBTEST_5(test_specific());
 }