Cleanup dead code (#63328)

Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63328

This code supported the old `at::_fft_with_size` operator which no longer exists.

Test Plan: Imported from OSS

Reviewed By: astaff

Differential Revision: D30343557

Pulled By: mruberry

fbshipit-source-id: 7a71585e013acb46c98f14fd40e15bdfbf026bac

diff --git a/aten/src/ATen/native/cuda/SpectralOps.cpp b/aten/src/ATen/native/cuda/SpectralOps.cpp
index 69729b2..15fd875 100644 (file)
--- a/aten/src/ATen/native/cuda/SpectralOps.cpp
+++ b/aten/src/ATen/native/cuda/SpectralOps.cpp
@@ -117,61 +117,6 @@ static void exec_cufft_plan(
 // tensors being contiguous, and that the strides at the innermost signal
 // dimension being unit (1) w.r.t. the corresponding data type.
 
-#pragma push
-#pragma diag_suppress 177   // Function was declared but never referenced
-static inline Tensor _run_cufft(
-    const CuFFTConfig &config, Tensor& input, int64_t signal_ndim,
-    bool complex_input, bool complex_output, bool inverse,
-    IntArrayRef checked_signal_sizes, fft_norm_mode norm, bool onesided,
-    IntArrayRef output_sizes, bool input_was_cloned
-) {
-  if (config.should_clone_input() && !input_was_cloned) {
-    input = input.clone(at::MemoryFormat::Contiguous);
-  }
-
-  auto& plan = config.plan();
-
-  // set output
-  auto output = at::empty(output_sizes, input.options());
-
-  // set to current stream
-  CUFFT_CHECK(cufftSetStream(plan, at::cuda::getCurrentCUDAStream()));
-
-  auto ws = at::empty({ config.workspace_size() }, at::device(at::kCUDA).dtype(at::kByte));
-  CUFFT_CHECK(cufftSetWorkArea(plan, ws.data_ptr()));
-
-  // run
-  exec_cufft_plan(config, input.data_ptr(), output.data_ptr(), !inverse);
-
-  // rescale if requested
-  auto size_last_signal_dim = checked_signal_sizes[signal_ndim - 1];
-  if (norm != fft_norm_mode::none) {
-    auto signal_numel = c10::multiply_integers(checked_signal_sizes);
-    double scale_denom;
-    if (norm == fft_norm_mode::by_root_n) {
-      scale_denom = std::sqrt(static_cast<double>(signal_numel));
-    } else {
-      scale_denom = static_cast<double>(signal_numel);
-    }
-    if (!complex_input && complex_output && !onesided) {
-      auto end_data_slice = infer_ft_real_to_complex_onesided_size(size_last_signal_dim);
-      output.narrow(signal_ndim, 0, end_data_slice).div_(scale_denom);
-    } else {
-      output.div_(scale_denom);
-    }
-  }
-
-  // if needed, fill out the other half using conjugate symmetry
-  if (!complex_input && complex_output && !onesided) {
-    DimVector signal_dims(signal_ndim);
-    std::iota(signal_dims.begin(), signal_dims.end(), 1);
-    auto out_as_complex = at::view_as_complex(output);
-    at::native::_fft_fill_with_conjugate_symmetry_(out_as_complex, signal_dims);
-  }
-  return output;
-}
-#pragma pop
-
 // The cuFFT plan cache
 // unique_ptr for nullability and to avoid reference invalidation on vector resize
 static std::vector<std::unique_ptr<CuFFTParamsLRUCache>> plan_caches;