Merged latest code improvements

diff --git a/Eigen/src/Core/arch/CUDA/PacketMathHalf.h b/Eigen/src/Core/arch/CUDA/PacketMathHalf.h
index 18a25de..267c8d5 100644
--- a/Eigen/src/Core/arch/CUDA/PacketMathHalf.h
+++ b/Eigen/src/Core/arch/CUDA/PacketMathHalf.h

@@ -529,15 +529,7 @@
 }
 
 
-#elif defined(EIGEN_VECTORIZE_SSE) && !EIGEN_ARCH_x86_64
-
-} // end namespace internal
-} // end namespace Eigen
-
-#include <mmintrin.h>
-
-namespace Eigen {
-namespace internal {
+#elif defined(EIGEN_VECTORIZE_SSE) && (!EIGEN_ARCH_x86_64) && (!EIGEN_COMP_MSVC)
 
 typedef struct {
   __m64 x;

diff --git a/Eigen/src/Core/arch/CUDA/TypeCasting.h b/Eigen/src/Core/arch/CUDA/TypeCasting.h
index a066758..6f1e5e6 100644
--- a/Eigen/src/Core/arch/CUDA/TypeCasting.h
+++ b/Eigen/src/Core/arch/CUDA/TypeCasting.h

@@ -128,12 +128,7 @@
   return float2half(a);
 }
 
-#elif defined(EIGEN_VECTORIZE_SSE) && !EIGEN_ARCH_x86_64
-
-} // end namespace internal
-} // end namespace Eigen
-
-#include <mmintrin.h>
+#elif defined(EIGEN_VECTORIZE_SSE) && (!EIGEN_ARCH_x86_64) && (!EIGEN_COMP_MSVC)
 
 namespace Eigen {
 namespace internal {

diff --git a/Eigen/src/SparseCore/SparseSparseProductWithPruning.h b/Eigen/src/SparseCore/SparseSparseProductWithPruning.h
index 20078f7..21c4190 100644
--- a/Eigen/src/SparseCore/SparseSparseProductWithPruning.h
+++ b/Eigen/src/SparseCore/SparseSparseProductWithPruning.h

@@ -51,7 +51,7 @@
   Index estimated_nnz_prod = lhsEval.nonZerosEstimate() + rhsEval.nonZerosEstimate();
 
   res.reserve(estimated_nnz_prod);
-  double ratioColRes = double(estimated_nnz_prod)/double(lhs.rows()*rhs.cols());
+  double ratioColRes = double(estimated_nnz_prod)/(double(lhs.rows())*double(rhs.cols()));
   for (Index j=0; j<cols; ++j)
   {
     // FIXME:

diff --git a/doc/snippets/CMakeLists.txt b/doc/snippets/CMakeLists.txt
index 8cc6df0..1baf32f 100644
--- a/doc/snippets/CMakeLists.txt
+++ b/doc/snippets/CMakeLists.txt

@@ -24,6 +24,3 @@
   set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${compile_snippet_src}
                               PROPERTIES OBJECT_DEPENDS ${snippet_src})
 endforeach(snippet_src)
-
-ei_add_target_property(compile_tut_arithmetic_transpose_aliasing COMPILE_FLAGS -DEIGEN_NO_DEBUG)
-ei_add_target_property(compile_TopicAliasing_mult4 COMPILE_FLAGS -DEIGEN_NO_DEBUG) # workaroud for Bug 1237

diff --git a/doc/snippets/compile_snippet.cpp.in b/doc/snippets/compile_snippet.cpp.in
index fdae39b..d63f371 100644
--- a/doc/snippets/compile_snippet.cpp.in
+++ b/doc/snippets/compile_snippet.cpp.in

@@ -1,5 +1,8 @@
-#include <Eigen/Eigen>
+static bool eigen_did_assert = false;
+#define eigen_assert(X) if(!eigen_did_assert && !(X)){ std::cout << "### Assertion raised in " << __FILE__ << ":" << __LINE__ << ":\n" #X << "\n### The following would happen without assertions:\n"; eigen_did_assert = true;}
+
 #include <iostream>
+#include <Eigen/Eigen>
 
 #ifndef M_PI
 #define M_PI 3.1415926535897932384626433832795