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Fix detection of same matrices for expressions not handled by extract_data

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This commit is contained in:
Gael Guennebaud
2016-04-13 18:40:02 +02:00
parent 547a3c0d28
commit 8d16e2aa27
5 changed files with 9 additions and 5 deletions
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3
Eigen/src/Core/PermutationMatrix.h
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@@ -584,10 +584,11 @@ struct permut_matrix_product_retval
const Index n = Side==OnTheLeft ? rows() : cols();
// FIXME we need an is_same for expression that is not sensitive to constness. For instance
// is_same_xpr<Block<const Matrix>, Block<Matrix> >::value should be true.
const typename Dest::Scalar *dst_data = internal::extract_data(dst);
if( is_same<MatrixTypeNestedCleaned,Dest>::value
&& blas_traits<MatrixTypeNestedCleaned>::HasUsableDirectAccess
&& blas_traits<Dest>::HasUsableDirectAccess
&& extract_data(dst) == extract_data(m_matrix))
&& dst_data!=0 && dst_data == extract_data(m_matrix))
{
// apply the permutation inplace
Matrix<bool,PermutationType::RowsAtCompileTime,1,0,PermutationType::MaxRowsAtCompileTime> mask(m_permutation.size());