diff options
Diffstat (limited to 'unsupported/Eigen/CXX11/src/Tensor/TensorMorphing.h')
| -rw-r--r-- | unsupported/Eigen/CXX11/src/Tensor/TensorMorphing.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorMorphing.h b/unsupported/Eigen/CXX11/src/Tensor/TensorMorphing.h index ceecd54d0..ef79c8567 100644 --- a/unsupported/Eigen/CXX11/src/Tensor/TensorMorphing.h +++ b/unsupported/Eigen/CXX11/src/Tensor/TensorMorphing.h @@ -451,6 +451,7 @@ struct TensorEvaluator<const TensorSlicingOp<StartIndices, Sizes, ArgType>, Devi } m_is_identity = true; + bool degenerate = false; for (int i = 0; i < internal::array_size<Dimensions>::value; ++i) { eigen_assert(m_impl.dimensions()[i] >= op.sizes()[i] + op.startIndices()[i]); @@ -458,6 +459,9 @@ struct TensorEvaluator<const TensorSlicingOp<StartIndices, Sizes, ArgType>, Devi op.startIndices()[i] != 0) { m_is_identity = false; } + if (op.sizes()[i] == 0) { // we have an empty size + degenerate = true; + } } // No strides for scalars. @@ -475,8 +479,8 @@ struct TensorEvaluator<const TensorSlicingOp<StartIndices, Sizes, ArgType>, Devi m_outputStrides[0] = 1; for (int i = 1; i < NumDims; ++i) { m_outputStrides[i] = m_outputStrides[i-1] * output_dims[i-1]; - m_fastOutputStrides[i] = internal::TensorIntDivisor<Index>(m_outputStrides[i]); - } + // NOTE: if tensor is degenerate, we send 1 to prevent TensorIntDivisor constructor crash + m_fastOutputStrides[i] = internal::TensorIntDivisor<Index>(degenerate ? 1 : m_outputStrides[i]); } } else { m_inputStrides[NumDims-1] = 1; for (int i = NumDims - 2; i >= 0; --i) { @@ -487,8 +491,8 @@ struct TensorEvaluator<const TensorSlicingOp<StartIndices, Sizes, ArgType>, Devi m_outputStrides[NumDims-1] = 1; for (int i = NumDims - 2; i >= 0; --i) { m_outputStrides[i] = m_outputStrides[i+1] * output_dims[i+1]; - m_fastOutputStrides[i] = internal::TensorIntDivisor<Index>(m_outputStrides[i]); - } + // NOTE: if tensor is degenerate, we send 1 to prevent TensorIntDivisor constructor crash + m_fastOutputStrides[i] = internal::TensorIntDivisor<Index>(degenerate ? 1 : m_outputStrides[i]); } } } |