Utils.h

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#pragma once
 
#include <ATen/core/Tensor.h>
#include <ATen/cuda/Exceptions.h>
#include <ATen/cudnn/cudnn-wrapper.h>
#include <ATen/cudnn/Handle.h>
 
namespace at { namespace native {
 
// cuDNN has a buggy check for tensor being contiguous (that is, it does
// not ignore stride for dimension that is equal to 0).  This function
// makes tensors which have zero stride contiguous, by setting the
// strides to 1 as cuDNN likes.
inline Tensor contiguousIfZeroInStrides(const Tensor& t) {
  for (auto s : t.strides()) {
    if (s == 0) return t.contiguous();
  }
  return t;
}
 
}}