From 3fda850c46e5e589668a85d89299433e0686eec9 Mon Sep 17 00:00:00 2001
From: Eugene Zhulenev <eugene.zhulenev@gmail.com>
Date: Wed, 29 Jan 2020 18:45:31 +0000
Subject: Remove dead code from TensorReduction.h

---
 .../Eigen/CXX11/src/Tensor/TensorReduction.h       | 131 ---------------------
 1 file changed, 131 deletions(-)

(limited to 'unsupported')

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorReduction.h b/unsupported/Eigen/CXX11/src/Tensor/TensorReduction.h
index ad14d82f8..5ca694062 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorReduction.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorReduction.h
@@ -452,70 +452,6 @@ struct ReductionReturnType {
 #endif
 };
 
-template <typename Self, typename Op,
-          bool Vectorizable =
-              (Self::InputPacketAccess & Self::ReducerTraits::PacketAccess)>
-class BlockReducer {
- public:
-  typedef typename Self::Index Index;
-  typedef typename Self::Scalar Scalar;
-  typedef typename Self::CoeffReturnType CoeffReturnType;
-  typedef typename Self::PacketReturnType PacketReturnType;
-  explicit BlockReducer(const Op& reducer) : op_(reducer) {
-    accum_ = op_.initialize();
-  }
-  void Reduce(Index index, Index num_values_to_reduce, Scalar* data) {
-    for (Index i = 0; i < num_values_to_reduce; ++i) {
-      op_.reduce(data[index + i], &accum_);
-    }
-  }
-  CoeffReturnType Finalize() { return op_.finalize(accum_); }
-  PacketReturnType FinalizePacket() {
-    // TODO(andydavis) This function should not be called for Scalar
-    // reductions: clean this up or add an assert here.
-    return PacketReturnType();
-  }
-
- private:
-  CoeffReturnType accum_;
-  Op op_;
-};
-
-template <typename Self, typename Op>
-class BlockReducer<Self, Op, true> {
- public:
-  typedef typename Self::Index Index;
-  typedef typename Self::Scalar Scalar;
-  typedef typename Self::CoeffReturnType CoeffReturnType;
-  typedef typename Self::PacketReturnType PacketReturnType;
-  static const Index PacketSize =
-      internal::unpacket_traits<PacketReturnType>::size;
-
-  explicit BlockReducer(const Op& reducer) : op_(reducer) {
-    vaccum_ = op_.template initializePacket<PacketReturnType>();
-    accum_ = op_.initialize();
-  }
-  void Reduce(Index index, Index num_values_to_reduce, Scalar* data) {
-    const Index vectorized_size =
-        (num_values_to_reduce / PacketSize) * PacketSize;
-    for (Index i = 0; i < vectorized_size; i += PacketSize) {
-      op_.reducePacket(
-          internal::ploadt<PacketReturnType, Unaligned>(&data[index + i]),
-          &vaccum_);
-    }
-    for (Index i = vectorized_size; i < num_values_to_reduce; ++i) {
-      op_.reduce(data[index + i], &accum_);
-    }
-  }
-  CoeffReturnType Finalize() { return op_.finalizeBoth(accum_, vaccum_); }
-  PacketReturnType FinalizePacket() { return op_.finalizePacket(vaccum_); }
-
- private:
-  PacketReturnType vaccum_;
-  CoeffReturnType accum_;
-  Op op_;
-};
-
 }  // end namespace internal
 
 
@@ -993,73 +929,6 @@ struct TensorReductionEvaluatorBase<const TensorReductionOp<Op, Dims, ArgType, M
     return startInput;
   }
 
-  EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void GetInputCoordsForOutputIndex(
-      Index index,
-      DSizes<Index, NumInputDims>* coords) const {
-    for (int i = 0; i < NumInputDims; ++i) {
-      (*coords)[i] = 0;
-    }
-    if (static_cast<int>(Layout) == static_cast<int>(ColMajor)) {
-      for (int i = NumOutputDims - 1; i > 0; --i) {
-        const Index idx = index / m_fastOutputStrides[i];
-        (*coords)[m_output_to_input_dim_map[i]] = idx;
-        index -= idx * m_outputStrides[i];
-      }
-      (*coords)[m_output_to_input_dim_map[0]] = index;
-    } else {
-      for (int i = 0; i < NumOutputDims - 1; ++i) {
-        const Index idx = index / m_fastOutputStrides[i];
-        (*coords)[m_output_to_input_dim_map[i]] = idx;
-        index -= idx * m_outputStrides[i];
-      }
-      (*coords)[m_output_to_input_dim_map[NumOutputDims-1]] = index;
-    }
-  }
-
-  EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE void CalculateTargetInputBlockShape(
-      const Index max_coeff_count,
-      const DSizes<Index, NumInputDims>& input_slice_sizes,
-      DSizes<Index, NumInputDims>* target_input_block_sizes) const {
-    typedef internal::BlockReducer<Self, Op> BlockReducer;
-    // TODO(andydavis) Compute reducer overhead correctly for the case where
-    // we are preserving the inner most dimension, and a single reducer
-    // reduces a packet's worth of output coefficients.
-    const Index reducer_overhead = sizeof(BlockReducer) / sizeof(Scalar);
-
-    Index coeff_to_allocate = max_coeff_count;
-    bool first_preserved_dim_allocated = false;
-    bool first_reduced_dim_allocated = false;
-    for (int i = 0; i < NumInputDims; ++i) {
-      const int dim = static_cast<int>(Layout) == static_cast<int>(ColMajor)
-                          ? i
-                          : NumInputDims - i - 1;
-      (*target_input_block_sizes)[dim] = 1;
-      if (m_reduced[dim]) {
-        // TODO(andydavis) Consider allocating to multiple reduced dimensions.
-        // Watch out for cases where reduced dimensions are not contiguous,
-        // which induces scattered reads.
-        if (!first_reduced_dim_allocated) {
-          (*target_input_block_sizes)[dim] =
-              numext::mini(input_slice_sizes[dim], coeff_to_allocate);
-          coeff_to_allocate /= (*target_input_block_sizes)[dim];
-          first_reduced_dim_allocated = true;
-        }
-      } else if (!first_preserved_dim_allocated) {
-        // TODO(andydavis) Include output block size in this L1 working set
-        // calculation.
-        const Index alloc_size = numext::maxi(
-            static_cast<Index>(1), coeff_to_allocate / reducer_overhead);
-        (*target_input_block_sizes)[dim] =
-            numext::mini(input_slice_sizes[dim], alloc_size);
-        coeff_to_allocate = numext::maxi(
-            static_cast<Index>(1),
-            coeff_to_allocate /
-                ((*target_input_block_sizes)[dim] * reducer_overhead));
-        first_preserved_dim_allocated = true;
-      }
-    }
-  }
-
   // Bitmap indicating if an input dimension is reduced or not.
   array<bool, NumInputDims> m_reduced;
   // Dimensions of the output of the operation.
-- 
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