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LLT: avoid making a copy when decomposing in place

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Jim Radford 2017-01-04 14:43:56 -08:00
parent e27f17bf5c
commit be281e5289
1 changed files with 2 additions and 1 deletions
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Eigen/src/Cholesky/LLT.h
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@ -428,6 +428,7 @@ LLT<MatrixType,_UpLo>& LLT<MatrixType,_UpLo>::compute(const EigenBase<InputType>
eigen_assert(a.rows()==a.cols()); eigen_assert(a.rows()==a.cols());
const Index size = a.rows(); const Index size = a.rows();
m_matrix.resize(size, size); m_matrix.resize(size, size);
if (!internal::is_same_dense(m_matrix, a.derived()))
m_matrix = a.derived(); m_matrix = a.derived();
// Compute matrix L1 norm = max abs column sum. // Compute matrix L1 norm = max abs column sum.