xhs-note-crawling/python/py/Lib/site-packages/torch/include/ATen/cudnn/Utils.h

#if !defined(TORCH_STABLE_ONLY) && !defined(TORCH_TARGET_VERSION)
#pragma once

#include <ATen/core/Tensor.h>
#include <ATen/cuda/Exceptions.h>
#include <ATen/cudnn/Handle.h>
#include <ATen/cudnn/cudnn-wrapper.h>

namespace at::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;
}

} // namespace at::native

#else
#error "This file should not be included when either TORCH_STABLE_ONLY or TORCH_TARGET_VERSION is defined."
#endif  // !defined(TORCH_STABLE_ONLY) && !defined(TORCH_TARGET_VERSION)