diff --git a/Eigen/StdDeque b/Eigen/StdDeque
index be3a7f82b..bc68397be 100644
--- a/Eigen/StdDeque
+++ b/Eigen/StdDeque
@@ -14,7 +14,7 @@
 #include "Core"
 #include <deque>
 
-#if EIGEN_COMP_MSVC && EIGEN_OS_WIN64 /* MSVC auto aligns in 64 bit builds */
+#if EIGEN_COMP_MSVC && EIGEN_OS_WIN64 && (EIGEN_MAX_STATIC_ALIGN_BYTES<=16) /* MSVC auto aligns up to 16 bytes in 64 bit builds */
 
 #define EIGEN_DEFINE_STL_DEQUE_SPECIALIZATION(...)
 
diff --git a/Eigen/StdList b/Eigen/StdList
index 07ba1297b..4c6262c08 100644
--- a/Eigen/StdList
+++ b/Eigen/StdList
@@ -13,7 +13,7 @@
 #include "Core"
 #include <list>
 
-#if EIGEN_COMP_MSVC && EIGEN_OS_WIN64 /* MSVC auto aligns in 64 bit builds */    
+#if EIGEN_COMP_MSVC && EIGEN_OS_WIN64 && (EIGEN_MAX_STATIC_ALIGN_BYTES<=16) /* MSVC auto aligns up to 16 bytes in 64 bit builds */
 
 #define EIGEN_DEFINE_STL_LIST_SPECIALIZATION(...)
 
diff --git a/Eigen/StdVector b/Eigen/StdVector
index fdfc37766..0c4697ad5 100644
--- a/Eigen/StdVector
+++ b/Eigen/StdVector
@@ -14,7 +14,7 @@
 #include "Core"
 #include <vector>
 
-#if EIGEN_COMP_MSVC && EIGEN_OS_WIN64 /* MSVC auto aligns in 64 bit builds */
+#if EIGEN_COMP_MSVC && EIGEN_OS_WIN64 && (EIGEN_MAX_STATIC_ALIGN_BYTES<=16) /* MSVC auto aligns up to 16 bytes in 64 bit builds */
 
 #define EIGEN_DEFINE_STL_VECTOR_SPECIALIZATION(...)
 
diff --git a/Eigen/src/Core/AssignEvaluator.h b/Eigen/src/Core/AssignEvaluator.h
index 489935b83..b0ec7b7ca 100644
--- a/Eigen/src/Core/AssignEvaluator.h
+++ b/Eigen/src/Core/AssignEvaluator.h
@@ -515,7 +515,7 @@ struct dense_assignment_loop<Kernel, LinearTraversal, CompleteUnrolling>
 template<typename Kernel>
 struct dense_assignment_loop<Kernel, SliceVectorizedTraversal, NoUnrolling>
 {
-  EIGEN_DEVICE_FUNC static inline void run(Kernel &kernel)
+  EIGEN_DEVICE_FUNC static EIGEN_STRONG_INLINE void run(Kernel &kernel)
   {
     typedef typename Kernel::Scalar Scalar;
     typedef typename Kernel::PacketType PacketType;
@@ -563,7 +563,7 @@ struct dense_assignment_loop<Kernel, SliceVectorizedTraversal, NoUnrolling>
 template<typename Kernel>
 struct dense_assignment_loop<Kernel, SliceVectorizedTraversal, InnerUnrolling>
 {
-  EIGEN_DEVICE_FUNC static inline void run(Kernel &kernel)
+  EIGEN_DEVICE_FUNC static EIGEN_STRONG_INLINE void run(Kernel &kernel)
   {
     typedef typename Kernel::DstEvaluatorType::XprType DstXprType;
     typedef typename Kernel::PacketType PacketType;
diff --git a/Eigen/src/Core/products/Parallelizer.h b/Eigen/src/Core/products/Parallelizer.h
index 3477d7182..c2f084c82 100644
--- a/Eigen/src/Core/products/Parallelizer.h
+++ b/Eigen/src/Core/products/Parallelizer.h
@@ -104,13 +104,14 @@ void parallelize_gemm(const Functor& func, Index rows, Index cols, Index depth,
   // - the sizes are large enough
 
   // compute the maximal number of threads from the size of the product:
-  // FIXME this has to be fine tuned
+  // This first heuristic takes into account that the product kernel is fully optimized when working with nr columns at once.
   Index size = transpose ? rows : cols;
-  Index pb_max_threads = std::max<Index>(1,size / 32);
+  Index pb_max_threads = std::max<Index>(1,size / Functor::Traits::nr);
+
   // compute the maximal number of threads from the total amount of work:
   double work = static_cast<double>(rows) * static_cast<double>(cols) *
       static_cast<double>(depth);
-  double kMinTaskSize = 50000;  // Heuristic.
+  double kMinTaskSize = 50000;  // FIXME improve this heuristic.
   pb_max_threads = std::max<Index>(1, std::min<Index>(pb_max_threads, work / kMinTaskSize));
 
   // compute the number of threads we are going to use
diff --git a/Eigen/src/Core/util/Macros.h b/Eigen/src/Core/util/Macros.h
index ab0550895..0e2863306 100644
--- a/Eigen/src/Core/util/Macros.h
+++ b/Eigen/src/Core/util/Macros.h
@@ -23,7 +23,7 @@
 
 /// \internal EIGEN_COMP_GNUC set to 1 for all compilers compatible with GCC
 #ifdef __GNUC__
-  #define EIGEN_COMP_GNUC 1
+  #define EIGEN_COMP_GNUC (__GNUC__*10+__GNUC_MINOR__)
 #else
   #define EIGEN_COMP_GNUC 0
 #endif
@@ -80,8 +80,8 @@
 //  2015   14      1900
 //  "15"   15      1900
 
-/// \internal EIGEN_COMP_MSVC_STRICT set to 1 if the compiler is really Microsoft Visual C++ and not ,e.g., ICC
-#if EIGEN_COMP_MSVC && !(EIGEN_COMP_ICC)
+/// \internal EIGEN_COMP_MSVC_STRICT set to 1 if the compiler is really Microsoft Visual C++ and not ,e.g., ICC or clang-cl
+#if EIGEN_COMP_MSVC && !(EIGEN_COMP_ICC || EIGEN_COMP_LLVM || EIGEN_COMP_CLANG)
   #define EIGEN_COMP_MSVC_STRICT _MSC_VER
 #else
   #define EIGEN_COMP_MSVC_STRICT 0
@@ -349,6 +349,12 @@
 # define __has_feature(x) 0
 #endif
 
+#if !( EIGEN_COMP_CLANG && ((EIGEN_COMP_CLANG<309) || defined(__apple_build_version__)) || EIGEN_COMP_GNUC_STRICT && EIGEN_COMP_GNUC<49)
+#define EIGEN_HAS_INDEXED_VIEW 1
+#else
+#define EIGEN_HAS_INDEXED_VIEW 0
+#endif
+
 // Upperbound on the C++ version to use.
 // Expected values are 03, 11, 14, 17, etc.
 // By default, let's use an arbitrarily large C++ version.
diff --git a/Eigen/src/Eigenvalues/ComplexEigenSolver.h b/Eigen/src/Eigenvalues/ComplexEigenSolver.h
index ec3b1633e..dc5fae06a 100644
--- a/Eigen/src/Eigenvalues/ComplexEigenSolver.h
+++ b/Eigen/src/Eigenvalues/ComplexEigenSolver.h
@@ -250,7 +250,7 @@ template<typename _MatrixType> class ComplexEigenSolver
     EigenvectorType m_matX;
 
   private:
-    void doComputeEigenvectors(const RealScalar& matrixnorm);
+    void doComputeEigenvectors(RealScalar matrixnorm);
     void sortEigenvalues(bool computeEigenvectors);
 };
 
@@ -284,10 +284,12 @@ ComplexEigenSolver<MatrixType>::compute(const EigenBase<InputType>& matrix, bool
 
 
 template<typename MatrixType>
-void ComplexEigenSolver<MatrixType>::doComputeEigenvectors(const RealScalar& matrixnorm)
+void ComplexEigenSolver<MatrixType>::doComputeEigenvectors(RealScalar matrixnorm)
 {
   const Index n = m_eivalues.size();
 
+  matrixnorm = numext::maxi(matrixnorm,(std::numeric_limits<RealScalar>::min)());
+
   // Compute X such that T = X D X^(-1), where D is the diagonal of T.
   // The matrix X is unit triangular.
   m_matX = EigenvectorType::Zero(n, n);
diff --git a/Eigen/src/Eigenvalues/RealSchur.h b/Eigen/src/Eigenvalues/RealSchur.h
index d6a339f07..f5c86041d 100644
--- a/Eigen/src/Eigenvalues/RealSchur.h
+++ b/Eigen/src/Eigenvalues/RealSchur.h
@@ -248,12 +248,24 @@ template<typename MatrixType>
 template<typename InputType>
 RealSchur<MatrixType>& RealSchur<MatrixType>::compute(const EigenBase<InputType>& matrix, bool computeU)
 {
+  const Scalar considerAsZero = (std::numeric_limits<Scalar>::min)();
+
   eigen_assert(matrix.cols() == matrix.rows());
   Index maxIters = m_maxIters;
   if (maxIters == -1)
     maxIters = m_maxIterationsPerRow * matrix.rows();
 
   Scalar scale = matrix.derived().cwiseAbs().maxCoeff();
+  if(scale<considerAsZero)
+  {
+    m_matT.setZero(matrix.rows(),matrix.cols());
+    if(computeU)
+      m_matU.setIdentity(matrix.rows(),matrix.cols());
+    m_info = Success;
+    m_isInitialized = true;
+    m_matUisUptodate = computeU;
+    return *this;
+  }
 
   // Step 1. Reduce to Hessenberg form
   m_hess.compute(matrix.derived()/scale);
diff --git a/Eigen/src/SVD/JacobiSVD.h b/Eigen/src/SVD/JacobiSVD.h
index e0cfb6283..1337ae987 100644
--- a/Eigen/src/SVD/JacobiSVD.h
+++ b/Eigen/src/SVD/JacobiSVD.h
@@ -200,10 +200,12 @@ public:
     ColsAtCompileTime = MatrixType::ColsAtCompileTime,
     MaxRowsAtCompileTime = MatrixType::MaxRowsAtCompileTime,
     MaxColsAtCompileTime = MatrixType::MaxColsAtCompileTime,
-    Options = MatrixType::Options
+    TrOptions = RowsAtCompileTime==1 ? (MatrixType::Options & ~(RowMajor))
+              : ColsAtCompileTime==1 ? (MatrixType::Options |   RowMajor)
+              : MatrixType::Options
   };
 
-  typedef Matrix<Scalar, ColsAtCompileTime, RowsAtCompileTime, Options, MaxColsAtCompileTime, MaxRowsAtCompileTime>
+  typedef Matrix<Scalar, ColsAtCompileTime, RowsAtCompileTime, TrOptions, MaxColsAtCompileTime, MaxRowsAtCompileTime>
           TransposeTypeWithSameStorageOrder;
 
   void allocate(const JacobiSVD<MatrixType, ColPivHouseholderQRPreconditioner>& svd)
diff --git a/Eigen/src/SparseCore/AmbiVector.h b/Eigen/src/SparseCore/AmbiVector.h
index 1233e164e..8a5cc91f2 100644
--- a/Eigen/src/SparseCore/AmbiVector.h
+++ b/Eigen/src/SparseCore/AmbiVector.h
@@ -336,7 +336,7 @@ class AmbiVector<_Scalar,_StorageIndex>::Iterator
       {
         do {
           ++m_cachedIndex;
-        } while (m_cachedIndex<m_vector.m_end && abs(m_vector.m_buffer[m_cachedIndex])<m_epsilon);
+        } while (m_cachedIndex<m_vector.m_end && abs(m_vector.m_buffer[m_cachedIndex])<=m_epsilon);
         if (m_cachedIndex<m_vector.m_end)
           m_cachedValue = m_vector.m_buffer[m_cachedIndex];
         else
@@ -347,7 +347,7 @@ class AmbiVector<_Scalar,_StorageIndex>::Iterator
         ListEl* EIGEN_RESTRICT llElements = reinterpret_cast<ListEl*>(m_vector.m_buffer);
         do {
           m_currentEl = llElements[m_currentEl].next;
-        } while (m_currentEl>=0 && abs(llElements[m_currentEl].value)<m_epsilon);
+        } while (m_currentEl>=0 && abs(llElements[m_currentEl].value)<=m_epsilon);
         if (m_currentEl<0)
         {
           m_cachedIndex = -1;
@@ -363,9 +363,9 @@ class AmbiVector<_Scalar,_StorageIndex>::Iterator
 
   protected:
     const AmbiVector& m_vector; // the target vector
-    StorageIndex m_currentEl;            // the current element in sparse/linked-list mode
+    StorageIndex m_currentEl;   // the current element in sparse/linked-list mode
     RealScalar m_epsilon;       // epsilon used to prune zero coefficients
-    StorageIndex m_cachedIndex;          // current coordinate
+    StorageIndex m_cachedIndex; // current coordinate
     Scalar m_cachedValue;       // current value
     bool m_isDense;             // mode of the vector
 };
diff --git a/Eigen/src/plugins/BlockMethods.h b/Eigen/src/plugins/BlockMethods.h
index 2d5a4e507..5caf14469 100644
--- a/Eigen/src/plugins/BlockMethods.h
+++ b/Eigen/src/plugins/BlockMethods.h
@@ -78,8 +78,8 @@ EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL
 ///
 /// \sa class Block, fix, fix<N>(int)
 ///
-EIGEN_DEVICE_FUNC
 template<typename NRowsType, typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename FixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -92,8 +92,8 @@ block(Index startRow, Index startCol, NRowsType blockRows, NColsType blockCols)
 }
 
 /// This is the const version of block(Index,Index,NRowsType,NColsType)
-EIGEN_DEVICE_FUNC
 template<typename NRowsType, typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstFixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -124,8 +124,8 @@ EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL
 ///
 /// \sa block(Index,Index,NRowsType,NColsType), class Block
 ///
-EIGEN_DEVICE_FUNC
 template<typename NRowsType, typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename FixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -138,8 +138,8 @@ topRightCorner(NRowsType cRows, NColsType cCols)
 }
 
 /// This is the const version of topRightCorner(NRowsType, NColsType).
-EIGEN_DEVICE_FUNC
 template<typename NRowsType, typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstFixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -229,8 +229,8 @@ EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL
 ///
 /// \sa block(Index,Index,NRowsType,NColsType), class Block
 ///
-EIGEN_DEVICE_FUNC
 template<typename NRowsType, typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename FixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -243,8 +243,8 @@ topLeftCorner(NRowsType cRows, NColsType cCols)
 }
 
 /// This is the const version of topLeftCorner(Index, Index).
-EIGEN_DEVICE_FUNC
 template<typename NRowsType, typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstFixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -333,8 +333,8 @@ EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL
 ///
 /// \sa block(Index,Index,NRowsType,NColsType), class Block
 ///
-EIGEN_DEVICE_FUNC
 template<typename NRowsType, typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename FixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -348,8 +348,8 @@ bottomRightCorner(NRowsType cRows, NColsType cCols)
 }
 
 /// This is the const version of bottomRightCorner(NRowsType, NColsType).
-EIGEN_DEVICE_FUNC
 template<typename NRowsType, typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstFixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -439,8 +439,8 @@ EIGEN_DOC_BLOCK_ADDONS_NOT_INNER_PANEL
 ///
 /// \sa block(Index,Index,NRowsType,NColsType), class Block
 ///
-EIGEN_DEVICE_FUNC
 template<typename NRowsType, typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename FixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -454,8 +454,8 @@ bottomLeftCorner(NRowsType cRows, NColsType cCols)
 }
 
 /// This is the const version of bottomLeftCorner(NRowsType, NColsType).
-EIGEN_DEVICE_FUNC
 template<typename NRowsType, typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename ConstFixedBlockXpr<internal::get_fixed_value<NRowsType>::value,internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -544,8 +544,8 @@ EIGEN_DOC_BLOCK_ADDONS_INNER_PANEL_IF(row-major)
 ///
 /// \sa block(Index,Index,NRowsType,NColsType), class Block
 ///
-EIGEN_DEVICE_FUNC
 template<typename NRowsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename NRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type
 #else
@@ -558,8 +558,8 @@ topRows(NRowsType n)
 }
 
 /// This is the const version of topRows(NRowsType).
-EIGEN_DEVICE_FUNC
 template<typename NRowsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstNRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type
 #else
@@ -619,8 +619,8 @@ EIGEN_DOC_BLOCK_ADDONS_INNER_PANEL_IF(row-major)
 ///
 /// \sa block(Index,Index,NRowsType,NColsType), class Block
 ///
-EIGEN_DEVICE_FUNC
 template<typename NRowsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename NRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type
 #else
@@ -633,8 +633,8 @@ bottomRows(NRowsType n)
 }
 
 /// This is the const version of bottomRows(NRowsType).
-EIGEN_DEVICE_FUNC
 template<typename NRowsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstNRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type
 #else
@@ -695,8 +695,8 @@ EIGEN_DOC_BLOCK_ADDONS_INNER_PANEL_IF(row-major)
 ///
 /// \sa block(Index,Index,NRowsType,NColsType), class Block
 ///
-EIGEN_DEVICE_FUNC
 template<typename NRowsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename NRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type
 #else
@@ -709,8 +709,8 @@ middleRows(Index startRow, NRowsType n)
 }
 
 /// This is the const version of middleRows(Index,NRowsType).
-EIGEN_DEVICE_FUNC
 template<typename NRowsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstNRowsBlockXpr<internal::get_fixed_value<NRowsType>::value>::Type
 #else
@@ -771,8 +771,8 @@ EIGEN_DOC_BLOCK_ADDONS_INNER_PANEL_IF(column-major)
 ///
 /// \sa block(Index,Index,NRowsType,NColsType), class Block
 ///
-EIGEN_DEVICE_FUNC
 template<typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename NColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -785,8 +785,8 @@ leftCols(NColsType n)
 }
 
 /// This is the const version of leftCols(NColsType).
-EIGEN_DEVICE_FUNC
 template<typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstNColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -846,8 +846,8 @@ EIGEN_DOC_BLOCK_ADDONS_INNER_PANEL_IF(column-major)
 ///
 /// \sa block(Index,Index,NRowsType,NColsType), class Block
 ///
-EIGEN_DEVICE_FUNC
 template<typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename NColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -860,8 +860,8 @@ rightCols(NColsType n)
 }
 
 /// This is the const version of rightCols(NColsType).
-EIGEN_DEVICE_FUNC
 template<typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstNColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -922,8 +922,8 @@ EIGEN_DOC_BLOCK_ADDONS_INNER_PANEL_IF(column-major)
 ///
 /// \sa block(Index,Index,NRowsType,NColsType), class Block
 ///
-EIGEN_DEVICE_FUNC
 template<typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename NColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -936,8 +936,8 @@ middleCols(Index startCol, NColsType numCols)
 }
 
 /// This is the const version of middleCols(Index,NColsType).
-EIGEN_DEVICE_FUNC
 template<typename NColsType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstNColsBlockXpr<internal::get_fixed_value<NColsType>::value>::Type
 #else
@@ -1130,8 +1130,8 @@ inline ConstRowXpr row(Index i) const
 ///
 /// \sa block(Index,Index,NRowsType,NColsType), fix<N>, fix<N>(int), class Block
 ///
-EIGEN_DEVICE_FUNC
 template<typename NType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename FixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type
 #else
@@ -1146,8 +1146,8 @@ segment(Index start, NType n)
 
 
 /// This is the const version of segment(Index,NType).
-EIGEN_DEVICE_FUNC
 template<typename NType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstFixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type
 #else
@@ -1180,8 +1180,8 @@ segment(Index start, NType n) const
 ///
 /// \sa class Block, block(Index,Index)
 ///
-EIGEN_DEVICE_FUNC
 template<typename NType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename FixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type
 #else
@@ -1195,8 +1195,8 @@ head(NType n)
 }
 
 /// This is the const version of head(NType).
-EIGEN_DEVICE_FUNC
 template<typename NType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstFixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type
 #else
@@ -1229,8 +1229,8 @@ head(NType n) const
 ///
 /// \sa class Block, block(Index,Index)
 ///
-EIGEN_DEVICE_FUNC
 template<typename NType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline typename FixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type
 #else
@@ -1244,8 +1244,8 @@ tail(NType n)
 }
 
 /// This is the const version of tail(Index).
-EIGEN_DEVICE_FUNC
 template<typename NType>
+EIGEN_DEVICE_FUNC
 #ifndef EIGEN_PARSED_BY_DOXYGEN
 inline const typename ConstFixedSegmentReturnType<internal::get_fixed_value<NType>::value>::Type
 #else
diff --git a/Eigen/src/plugins/IndexedViewMethods.h b/Eigen/src/plugins/IndexedViewMethods.h
index b2cc2944a..5e28ec71c 100644
--- a/Eigen/src/plugins/IndexedViewMethods.h
+++ b/Eigen/src/plugins/IndexedViewMethods.h
@@ -7,7 +7,7 @@
 // Public License v. 2.0. If a copy of the MPL was not distributed
 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-#ifndef EIGEN_PARSED_BY_DOXYGEN
+#if !defined(EIGEN_PARSED_BY_DOXYGEN) && EIGEN_HAS_INDEXED_VIEW
 
 // This file is automatically included twice to generate const and non-const versions
 
@@ -256,5 +256,4 @@ template<typename Indices>
 IndexedView_or_VectorBlock
 operator()(const Indices& indices);
 
-#endif // EIGEN_PARSED_BY_DOXYGEN
-
+#endif  // EIGEN_PARSED_BY_DOXYGEN && EIGEN_HAS_INDEXED_VIEW
diff --git a/test/eigensolver_complex.cpp b/test/eigensolver_complex.cpp
index 8e2bb9ef0..293b1b265 100644
--- a/test/eigensolver_complex.cpp
+++ b/test/eigensolver_complex.cpp
@@ -131,6 +131,15 @@ template<typename MatrixType> void eigensolver(const MatrixType& m)
     ComplexEigenSolver<MatrixType> eig(a.adjoint() * a);
     eig.compute(a.adjoint() * a);
   }
+
+  // regression test for bug 478
+  {
+    a.setZero();
+    ComplexEigenSolver<MatrixType> ei3(a);
+    VERIFY_IS_EQUAL(ei3.info(), Success);
+    VERIFY_IS_MUCH_SMALLER_THAN(ei3.eigenvalues().norm(),RealScalar(1));
+    VERIFY((ei3.eigenvectors().transpose()*ei3.eigenvectors().transpose()).eval().isIdentity());
+  }
 }
 
 template<typename MatrixType> void eigensolver_verify_assert(const MatrixType& m)
diff --git a/test/eigensolver_generic.cpp b/test/eigensolver_generic.cpp
index e18fbf687..d0e644d4b 100644
--- a/test/eigensolver_generic.cpp
+++ b/test/eigensolver_generic.cpp
@@ -76,6 +76,15 @@ template<typename MatrixType> void eigensolver(const MatrixType& m)
     EigenSolver<MatrixType> eig(a.adjoint() * a);
     eig.compute(a.adjoint() * a);
   }
+
+  // regression test for bug 478
+  {
+    a.setZero();
+    EigenSolver<MatrixType> ei3(a);
+    VERIFY_IS_EQUAL(ei3.info(), Success);
+    VERIFY_IS_MUCH_SMALLER_THAN(ei3.eigenvalues().norm(),RealScalar(1));
+    VERIFY((ei3.eigenvectors().transpose()*ei3.eigenvectors().transpose()).eval().isIdentity());
+  }
 }
 
 template<typename MatrixType> void eigensolver_verify_assert(const MatrixType& m)
diff --git a/test/eigensolver_selfadjoint.cpp b/test/eigensolver_selfadjoint.cpp
index 4ed126116..39ad4130e 100644
--- a/test/eigensolver_selfadjoint.cpp
+++ b/test/eigensolver_selfadjoint.cpp
@@ -180,6 +180,15 @@ template<typename MatrixType> void selfadjointeigensolver(const MatrixType& m)
     SelfAdjointEigenSolver<MatrixType> eig(a.adjoint() * a);
     eig.compute(a.adjoint() * a);
   }
+
+  // regression test for bug 478
+  {
+    a.setZero();
+    SelfAdjointEigenSolver<MatrixType> ei3(a);
+    VERIFY_IS_EQUAL(ei3.info(), Success);
+    VERIFY_IS_MUCH_SMALLER_THAN(ei3.eigenvalues().norm(),RealScalar(1));
+    VERIFY((ei3.eigenvectors().transpose()*ei3.eigenvectors().transpose()).eval().isIdentity());
+  }
 }
 
 template<int>
diff --git a/test/indexed_view.cpp b/test/indexed_view.cpp
index 909d2351d..4cbc00639 100644
--- a/test/indexed_view.cpp
+++ b/test/indexed_view.cpp
@@ -79,6 +79,7 @@ is_same_seq_type(const T1& a, const T2& b)
 
 void check_indexed_view()
 {
+#if EIGEN_HAS_INDEXED_VIEW
   using Eigen::placeholders::all;
   using Eigen::placeholders::last;
   using Eigen::placeholders::end;
@@ -297,7 +298,6 @@ void check_indexed_view()
 
   VERIFY_IS_APPROX( (A(std::array<int,3>{{1,3,5}}, std::array<int,4>{{9,6,3,0}})), A(seqN(1,3,2), seqN(9,4,-3)) );
 
-#if (!EIGEN_COMP_CLANG) || (EIGEN_COMP_CLANG>=308 && !defined(__apple_build_version__))
   VERIFY_IS_APPROX( A({3, 1, 6, 5}, all), A(std::array<int,4>{{3, 1, 6, 5}}, all) );
   VERIFY_IS_APPROX( A(all,{3, 1, 6, 5}), A(all,std::array<int,4>{{3, 1, 6, 5}}) );
   VERIFY_IS_APPROX( A({1,3,5},{3, 1, 6, 5}), A(std::array<int,3>{{1,3,5}},std::array<int,4>{{3, 1, 6, 5}}) );
@@ -310,7 +310,6 @@ void check_indexed_view()
 
   VERIFY_IS_APPROX( b({3, 1, 6, 5}), b(std::array<int,4>{{3, 1, 6, 5}}) );
   VERIFY_IS_EQUAL( b({1,3,5}).SizeAtCompileTime, 3 );
-#endif
 
 #endif
 
@@ -366,6 +365,7 @@ void check_indexed_view()
     VERIFY( is_same_eq( cA.middleRows<3>(1), cA.middleRows(1,fix<3>)) );
   }
 
+#endif  // EIGEN_HAS_INDEXED_VIEW
 }
 
 void test_indexed_view()
diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorContraction.h b/unsupported/Eigen/CXX11/src/Tensor/TensorContraction.h
index 71f086426..bf4a476d9 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorContraction.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorContraction.h
@@ -64,9 +64,9 @@ void pack_simple(Scalar * dst, const Scalar * src, Index cols, Index rows, Index
 template<typename LhsScalar, typename RhsScalar, typename Scalar>
   struct libxsmm_wrapper {
     libxsmm_wrapper() {}
-    libxsmm_wrapper(int flags, int m, int n, int k, int lda, int ldb, int ldc, float alpha, float beta, int prefetch) {}
-    void operator()(const LhsScalar* a, const RhsScalar* b, Scalar* c) {}
-    void operator()(const LhsScalar* a, const RhsScalar* b, Scalar* c, const LhsScalar* ap, const RhsScalar* bp, const Scalar* cp) {}
+    libxsmm_wrapper(int, int, int, int, int, int, int, float, float, int) {}
+    void operator()(const LhsScalar*, const RhsScalar*, Scalar*) {}
+    void operator()(const LhsScalar*, const RhsScalar*, Scalar*, const LhsScalar*, const RhsScalar*, const Scalar*) {}
   };
 
   template<>
@@ -682,10 +682,9 @@ protected:
     }
 
     m_can_use_xsmm = true;
-    #else
-    // silence the compiler warning
-    (void) eval_op_indices;
-    #endif
+#else
+    EIGEN_UNUSED_VARIABLE(eval_op_indices);
+#endif
   }
 
 #if defined(EIGEN_VECTORIZE_AVX) && defined(EIGEN_USE_LIBXSMM)