From 785b9c0127a508cb7d573cdad895707b6d5bc77e Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Tue, 9 Jun 2015 17:42:09 +0200
Subject: bug #1003: assert in MapBase if the provided pointer is not aligned
 on scalar while it is expected to be. Also add a EIGEN_ALIGN8 macro.

---
 Eigen/src/Core/MapBase.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'Eigen/src/Core/MapBase.h')

diff --git a/Eigen/src/Core/MapBase.h b/Eigen/src/Core/MapBase.h
index fe61d2a28..0d85085c8 100644
--- a/Eigen/src/Core/MapBase.h
+++ b/Eigen/src/Core/MapBase.h
@@ -160,6 +160,8 @@ template<typename Derived> class MapBase<Derived, ReadOnlyAccessors>
     EIGEN_DEVICE_FUNC
     void checkSanity() const
     {
+      eigen_assert(EIGEN_IMPLIES(internal::packet_traits<Scalar>::AlignedOnScalar, (size_t(m_data) % sizeof(Scalar)) == 0)
+                   && "input pointer is not aligned on scalar boundary, e.g., use \"EIGEN_ALIGN8 T ptr[N];\" for double or complex<float>");
       eigen_assert(EIGEN_IMPLIES(internal::traits<Derived>::IsAligned, (size_t(m_data) % EIGEN_ALIGN_BYTES) == 0) && "data is not aligned");
     }
 
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