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Backport early cut return for empty matrix product

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Gael Guennebaud
2015-12-16 09:42:56 +01:00
parent f22036f5f8
commit efc7c2121a
1 changed files with 2 additions and 0 deletions
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2
Eigen/src/Core/products/GeneralMatrixMatrix.h
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@@ -401,6 +401,8 @@ class GeneralProduct<Lhs, Rhs, GemmProduct>
template<typename Dest> void scaleAndAddTo(Dest& dst, const Scalar& alpha) const template<typename Dest> void scaleAndAddTo(Dest& dst, const Scalar& alpha) const
{ {
eigen_assert(dst.rows()==m_lhs.rows() && dst.cols()==m_rhs.cols()); eigen_assert(dst.rows()==m_lhs.rows() && dst.cols()==m_rhs.cols());
if(a_lhs.cols()==0 || a_lhs.rows()==0 || a_rhs.cols()==0)
return;
typename internal::add_const_on_value_type<ActualLhsType>::type lhs = LhsBlasTraits::extract(m_lhs); typename internal::add_const_on_value_type<ActualLhsType>::type lhs = LhsBlasTraits::extract(m_lhs);
typename internal::add_const_on_value_type<ActualRhsType>::type rhs = RhsBlasTraits::extract(m_rhs); typename internal::add_const_on_value_type<ActualRhsType>::type rhs = RhsBlasTraits::extract(m_rhs);