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kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/native/tags.yaml

@@ -0,0 +1,105 @@
+# This yaml file contains all the possible tags that can be defined in `tags` in `native_functions.yaml`
+
+- tag: inplace_view
+  desc: |
+          This tag indicates if an operator *only* modifies the tensor metadata
+- tag: pt2_compliant_tag
+  desc: |
+          This tag indicates if the operator is guaranteed to
+          work with the PT2 compilation APIs (torch.compile,
+          torch.export, etc). If you add this tag to an
+          operator, please use
+          `torch.testing._internal.optest.opcheck` to test that
+          the operator has been registered correctly and
+          works with torch.compile
+- tag: view_copy
+  desc: |
+          This tag indicates operators that are *_copy* variants
+          of view/aliasing operators. If an operator has a view_copy tag,
+          then it should have the name {op}_copy, where {op} is a view operator.
+- tag: dynamic_output_shape
+  desc: |
+          This tag indicates if an operator's output's shape depends on input Tensor
+          data.
+- tag: data_dependent_output
+  desc: |
+          Operator has a non-Tensor output whose value is dependent on the data
+          of Tensor inputs.  Among other things, this implies that this operator
+          cannot be run with meta tensor (since data is not available), nor
+          can it be symbolically traced.
+- tag: generated
+  desc: |
+          This tag indicates that the operator doesn't have an explicit entry in
+          native_functions.yaml, and instead was generated automatically by the codegen.
+- tag: nondeterministic_seeded
+  desc: |
+          This tag indicates if an operator is nondeterministically seeded
+          (i.e., is random) such that the operator intentionally produces
+          different results when run twice on the same inputs, but this randomness
+          is controlled by a Generator which, if reseeded would give you the
+          same result.
+- tag: nondeterministic_bitwise
+  desc: |
+          This tag indicates if an operator doesn't guarantee bitwise equivalence
+          across different runs of an operator with identical inputs.
+- tag: needs_exact_strides
+  desc: |
+          This tag indicates that the operator should be passed Tensors following
+          the same strides as observed in eager when compiled in inductor.
+          Only one of {needs_exact_strides, needs_contiguous_strides, needs_fixed_stride_order, flexible_layout}
+          can apply; if multiple are assigned then we assume the most restrictive one.
+- tag: needs_contiguous_strides
+  desc: |
+          This tag indicates that the operator should be passed contiguous Tensors.
+          Failure to do so will result in undefined behavior.
+- tag: needs_fixed_stride_order
+  desc: |
+          This tag indicates that the operator should be passed Tensors following
+          the same stride permutation as observed in eager when compiled in inductor.
+          Only one of {needs_exact_strides, needs_contiguous_strides, needs_fixed_stride_order, flexible_layout}
+          can apply; if multiple are assigned then we assume the most restrictive one.
+- tag: flexible_layout
+  desc: |
+          This tag indicates that the custom operator can accept inputs with varying
+          strides/storage_offset and that when compiled, Inductor is allowed to change
+          the strides/storage_offset of inputs to the custom operator.
+          Only one of {needs_exact_strides, needs_contiguous_strides, needs_fixed_stride_order, flexible_layout}
+          can apply; if multiple are assigned then we assume the most restrictive one.
+
+# NOTE [Core ATen Ops]
+- tag: core
+  desc: |
+          Core aten ops is a subset of aten ops that remains after aten-to-aten decomposition and
+          functionalization pass. Core aten ops are fully functional and adhere to single static
+          assignment (SSA): this implies there will be no `inplace` or `_out` variants in this opset.
+          This opset is designed to serve as the functional IR to interface with compiler backends.
+          In contrast to primTorch, core aten opset doesn't decompose ops into explicit
+          type promotion and broadcasting ops.
+          Core aten ops is also effectively the opset produced by torchdynamo.export(aten_graph=True),
+          and thus can be used as an opset for export purpose.
+- tag: pointwise
+  desc: |
+          Pointwise operators are operators where each element of the output is computed only by accessing
+          the corresponding element of all the broadcasted inputs. The output shape will be the broadcasted
+          shape of the inputs.
+- tag: maybe_aliasing_or_mutating
+  desc: |
+          For some ops, we can't statically determine whether the op is functional or not. Note that this is only
+          relevant to CIA ops that decompose before functionalization/autograd. It is useful to
+          know this information for export as we would want to decompose these ops as they are unsafe to be
+          preserved.
+- tag: cudagraph_unsafe
+  desc: |
+          This operator does not support cudagraphs. The presence of this tag on an operator will cause
+          Inductor to split the graph around this operator. Note that operators without this tag may still
+          not support CUDAGraphs. Inductor may have other hardcoded lists around that.
+- tag: reduction
+  desc: |
+          This tag indicates that an operator performs a reduction operation, computing aggregate values
+          (sum, mean, max, min, etc.) across one or more dimensions of the input tensor(s).
+- tag: out_variant
+  desc: |
+          This tag indicates that the operator is an out variant of a functional
+          operator. This tag only applies to custom ops. Out variant operators
+          write their results to pre-allocated output tensors (the out args)
+          rather than allocating new tensors.

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/ATenOpList.cpp

@@ -0,0 +1,36 @@
+#include <ATen/core/ATenOpList.h>
+
+#include <string>
+#include <cstring>
+#include <utility>
+#include <unordered_set>
+#include <ATen/core/operator_name.h>
+
+// ${generated_comment}
+
+namespace at {
+
+namespace {
+struct OpNameEquals final {
+  bool operator()(const std::pair<const char*, const char*>& lhs, const std::pair<const char*, const char*>& rhs) const {
+      return 0 == strcmp(lhs.first, rhs.first) && 0 == strcmp(lhs.second, rhs.second);
+  }
+};
+
+struct OpNameHash final {
+  size_t operator()(const std::pair<const char*, const char*>& p) const {
+      // use std::hash<std::string> because std::hash<const char*> would hash pointers and not pointed-to strings
+      return std::hash<std::string>()(p.first) ^ (~ std::hash<std::string>()(p.second));
+  }
+};
+}
+
+bool is_custom_op(const c10::OperatorName& opName) {
+  static std::unordered_set<std::pair<const char*, const char*>, OpNameHash, OpNameEquals> ops {
+    ${aten_ops}
+    {"", ""}
+  };
+  return ops.count(std::make_pair(
+             opName.name.c_str(), opName.overload_name.c_str())) == 0;
+}
+}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/CompositeViewCopyKernels.cpp

@@ -0,0 +1,73 @@
+#define TORCH_ASSERT_ONLY_METHOD_OPERATORS
+// ${generated_comment}
+
+#include <ATen/InferSize.h>
+#include <ATen/Tensor.h>
+#include <ATen/native/Resize.h>
+
+#ifndef AT_PER_OPERATOR_HEADERS
+#include <ATen/Operators.h>
+#else
+#include <ATen/ops/clone.h>
+$ops_headers
+#endif
+
+namespace at {
+namespace native {
+
+// This file contains a number of kernels for aten functions that are fully code-generated.
+// TODO: rename this file to something more generic.
+
+namespace {
+at::Tensor clone_arg(const at::Tensor& t) {
+    return t.clone();
+}
+
+std::vector<at::Tensor> clone_arg(const at::TensorList& t_list) {
+    std::vector<at::Tensor> out(t_list.size());
+    for (const auto& i : c10::irange(t_list.size())) {
+        out[i] = t_list[i].clone();
+    }
+    return out;
+}
+
+// duped with gen_resize_out_helper from structured kernels
+void copy_arg(const at::Tensor& dst, const at::Tensor& src) {
+    TORCH_CHECK(src.dtype() == dst.dtype(),
+        "Expected out tensor to have dtype ", src.dtype(), ", but got ", dst.dtype(), " instead");
+    TORCH_CHECK(src.device() == dst.device(),
+        "Expected out tensor to have device ", src.device(), ", but got ", dst.device(), " instead");
+    dst.copy_(src);
+}
+
+void copy_arg(const at::TensorList& dst, const at::TensorList& src) {
+    TORCH_INTERNAL_ASSERT(dst.size() == src.size());
+    for (const auto& i : c10::irange(dst.size())) {
+        copy_arg(dst[i], src[i]);
+    }
+}
+
+// TODO: this doesn't handle restriding empty tensors correctly; see
+// gen_resize_out_helper for the correct algorithm
+
+void resize_out_helper(const at::Tensor& dst, const at::Tensor& src) {
+    at::native::resize_output(dst, src.sizes());
+}
+
+void resize_out_helper(const at::TensorList& dst, const at::TensorList& src) {
+    TORCH_INTERNAL_ASSERT(dst.size() == src.size());
+    for (const auto& i : c10::irange(dst.size())) {
+        at::native::resize_output(dst[i], src[i].sizes());
+    }
+}
+}
+
+
+${CompositeViewCopyKernel_Definitions}
+
+${GeneratedCompositeFunctional_Definitions}
+
+${GeneratedCompositeOut_Definitions}
+
+} // namespace native
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/DispatchKeyFunction.h

@@ -0,0 +1,23 @@
+#pragma once
+// ${generated_comment}
+
+// NB: The implementing C++ file is RegisterDispatchKey.cpp
+
+// The only #includes we need are for custom classes that have defaults in the C++ API
+#include <c10/core/MemoryFormat.h>
+#include <c10/core/Scalar.h>
+#include <ATen/core/Reduction.h>
+
+// Forward declarations of any types needed in the operator signatures.
+// We can't directly include these classes because it will cause circular include dependencies.
+// This file is included by TensorBody.h, which defines the Tensor class.
+#include <ATen/core/ATen_fwd.h>
+
+namespace at {
+
+namespace ${dispatch_namespace} {
+
+${dispatch_namespaced_declarations}
+
+} // namespace ${dispatch_namespace}
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/DispatchKeyFunctions.h

@@ -0,0 +1,29 @@
+#include <ATen/core/TensorBody.h>
+
+// TODO Undo all logic introduced for Note [Avoiding Include Cycles In Static Dispatch]
+// Code introduced to avoid cyclic dependency in static dispatch is no longer
+// needed as static dispatch logic is moved from TensorBody.h, which caused cycles in the first place,
+// to Operators.cpp for supporting multiple backends with multiple kernels.
+//
+// Note [Avoiding Include Cycles In Static Dispatch]
+// In order to avoid #include cycles in the static dispatch build, we've carefully split out
+// the static function definition files into {DispatchKey}Functions.h and {DispatchKey}Functions_inl.h.
+//
+// Without this split, the include cycle looks like TensorBody.h -> CPUFunctions.h -> TensorBody.h.
+// - TensorBody.h #includes CPUFunctions.h in the static dispatch build, because the tensor methods
+//   all need to call into the fastpath C++ API defined in CPUFunctions.h. The methods are also all
+//   directly inlined into TensorBody.h.
+// - CPUFunctions.h #includes TensorBody.h because it contains function declarations for the entire C++ API,
+//   which include functions that have defaultable std::optional<Tensor> arguments.
+//   That requires knowing the full Tensor class definition.
+//
+// We break the cycle by doing the following:
+// - Split out CPUFunction.h into two files: CPUFunctions.h and CPUFunctions_inl.h
+// - CPUFunction.h is a dummy file that just includes the Tensor class and includes CPUFunctions_inl.,
+// - CPUFunctions_inl.h includes everything else
+// - (only in the static dispatch build) TensorBody.h makes sure to finish defining the Tensor class,
+//   and then it includes CPUFunctions_inl.h.
+// - All other files that want the cpu fastpath functions can include CPUFunctions.h directly.
+// - This also means that static dispatch build, CPUFunctions.h only needs to
+//   #include TensorBody.h, and it will automatically bring in CPUFunctions_inl.h.
+${inline_headers}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/DispatchKeyFunctions_inl.h

@@ -0,0 +1,22 @@
+#pragma once
+// ${generated_comment}
+
+// NB: The implementing C++ file is RegisterDispatchKey.cpp
+
+// The only #includes we need are for custom classes that have defaults in the C++ API
+#include <c10/core/MemoryFormat.h>
+#include <c10/core/Scalar.h>
+#include <ATen/core/Reduction.h>
+
+#if defined(AT_PER_OPERATOR_HEADERS) && defined(TORCH_ASSERT_ONLY_METHOD_OPERATORS)
+#error This change adds a dependency on all pytorch operators, meaning the     \
+  file will need to be re-compiled every time an operator is changed or added. \
+  Consider including a specific operator from                                  \
+  <ATen/ops/{my_operator}_${dispatch_namespace}_dispatch.h>.                   \
+  See NOTE [TORCH_ASSERT_ONLY_METHOD_OPERATORS].
+#endif
+
+${DispatchKeyFunctions_inl_includes}
+
+
+${dispatch_namespaced_declarations}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/DispatchKeyNativeFunctions.cpp

@@ -0,0 +1,13 @@
+// ${generated_comment}
+${includes}
+${native_functions_include}
+
+namespace {
+${helper_fns}
+} // namespace
+
+${namespace_prologue}
+
+${native_function_definitions}
+
+${namespace_epilogue}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/DispatchKeyNativeFunctions.h

@@ -0,0 +1,19 @@
+#pragma once
+
+// an external backend might generate file within its code tree
+// and check all the source files within the tree with clang-format.
+// so, disable it since the backend might have a different config.
+// clang-format off
+
+// ${generated_comment}
+
+#include <ATen/Tensor.h>
+
+${namespace_prologue}
+
+struct ${class_name} {
+
+${dispatch_declarations}
+
+};
+${namespace_epilogue}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/Function.h

@@ -0,0 +1,27 @@
+#pragma once
+
+// ${generated_comment}
+
+#include <ATen/Context.h>
+#include <ATen/DeviceGuard.h>
+#include <ATen/TensorUtils.h>
+#include <ATen/TracerMode.h>
+#include <ATen/core/Generator.h>
+#include <ATen/core/Reduction.h>
+#include <ATen/core/Tensor.h>
+#include <c10/core/Scalar.h>
+#include <c10/core/Storage.h>
+#include <c10/core/TensorOptions.h>
+#include <c10/util/Deprecated.h>
+#include <optional>
+#include <string_view>
+
+${static_dispatch_ops_headers}
+
+${operator_includes}
+
+namespace at {
+
+${function_definitions}
+
+}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/FunctionalInverses.h

@@ -0,0 +1,23 @@
+#pragma once
+
+// ${generated_comment}
+
+#include <ATen/FunctionalStorageImpl.h>
+#include <ATen/Tensor.h>
+
+namespace at {
+namespace functionalization {
+
+struct FunctionalInverses {
+
+${view_inverse_declarations}
+
+// NB: These are not generated! They're manually implemented in the template.
+// TODO: Change codegen to generate these. See the following link:
+// https://github.com/pytorch/pytorch/blob/main/torchgen/model.py#L2583-L2585
+static at::Tensor chunk_inverse(const at::Tensor & base, const at::Tensor & mutated_view, InverseReturnMode inverse_return_mode, int64_t mutated_view_idx, int chunks, int dim);
+static at::Tensor narrow_inverse(const at::Tensor & base, const at::Tensor & mutated_view, InverseReturnMode inverse_return_mode, int dim, c10::SymInt start, c10::SymInt length);
+
+};
+}
+}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/Functions.cpp

@@ -0,0 +1,105 @@
+#include <array>
+
+#include <ATen/Functions.h>
+#include <ATen/Utils.h>
+#include <c10/core/Allocator.h>
+
+namespace at {
+
+Tensor TensorMaker::make_tensor() {
+   AutoDispatchBelowADInplaceOrView guard{}; // TODO: Remove.
+   tracer::impl::NoTracerDispatchMode tracer_guard{};
+
+   check_size_nonnegative(sizes_);
+
+   TORCH_CHECK_VALUE(
+       !deleter_ || !ctx_,
+       "The deleter and context arguments are mutually exclusive.");
+
+   if (device_ == std::nullopt) {
+     device_ = globalContext().getDeviceFromPtr(data_, opts_.device().type());
+   }
+
+   if (opts_.device().has_index()) {
+     // clang-format off
+     TORCH_CHECK_VALUE(
+         opts_.device() == *device_,
+         "Specified device ", opts_.device(), " does not match device of data ", *device_);
+     // clang-format on
+   }
+
+   std::size_t size_bytes = computeStorageSize();
+
+   DataPtr data_ptr{};
+   if (deleter_) {
+     data_ptr = makeDataPtrFromDeleter();
+   } else {
+     data_ptr = makeDataPtrFromContext();
+   }
+
+   TORCH_CHECK(!resizeable_ || allocator_ != nullptr, "Must specify an allocator with allocator() if you want to use resizeable_storage()");
+   Storage storage{Storage::use_byte_size_t{}, size_bytes, std::move(data_ptr), /*allocator=*/allocator_, /*resizable=*/resizeable_};
+
+   Tensor tensor = detail::make_tensor<TensorImpl>(
+       std::move(storage), opts_.computeDispatchKey(), opts_.dtype());
+
+  TensorImpl* tensor_impl = tensor.unsafeGetTensorImpl();
+  if (strides_) {
+    tensor_impl->set_sizes_and_strides(sizes_, *strides_);
+  } else {
+    tensor_impl->set_sizes_contiguous(sizes_);
+  }
+  if (storage_offset_) {
+    tensor_impl->set_storage_offset(*storage_offset_);
+  }
+
+  tensor_impl->set_requires_grad(opts_.requires_grad());
+
+  return tensor;
+ }
+
+ std::size_t TensorMaker::computeStorageSize() const noexcept {
+   std::size_t itemsize = opts_.dtype().itemsize();
+
+   if (strides_) {
+     auto storage_size = detail::computeStorageNbytes(sizes_, *strides_, itemsize);
+     if (storage_offset_) {
+       storage_size += storage_offset_.value() * itemsize;
+     }
+     return storage_size;
+   }
+
+   std::size_t size = 1;
+   for (std::int64_t s : sizes_) {
+     size *= static_cast<std::size_t>(s);
+   }
+   auto storage_size = size * itemsize;
+   if (storage_offset_) {
+     storage_size += storage_offset_.value() * itemsize;
+   }
+   return storage_size;
+ }
+
+ inline DataPtr TensorMaker::makeDataPtrFromDeleter() noexcept {
+   return InefficientStdFunctionContext::makeDataPtr(data_, std::move(deleter_), *device_);
+ }
+
+ inline DataPtr TensorMaker::makeDataPtrFromContext() noexcept {
+   return DataPtr{data_, ctx_.release(), ctx_.get_deleter(), *device_};
+ }
+
+ IntArrayRef TensorMaker::makeTempSizes() const noexcept {
+   static std::int64_t zeros[5] = {0, 0, 0, 0, 0};
+   if (opts_.has_memory_format()) {
+     MemoryFormat format = *opts_.memory_format_opt();
+     if (format == MemoryFormat::ChannelsLast) {
+       return IntArrayRef(zeros, 4);
+     }
+     if (format == MemoryFormat::ChannelsLast3d) {
+       return IntArrayRef(zeros, 5);
+     }
+   }
+   return IntArrayRef(zeros, 1);
+ }
+
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/Functions.h

@@ -0,0 +1,143 @@
+#pragma once
+
+// ${generated_comment}
+
+#ifdef TORCH_ASSERT_NO_OPERATORS
+#error This change adds a dependency on native_functions.yaml,            \
+  meaning the file will need to be re-compiled every time an operator     \
+  is changed or added. Consider if your change would be better placed in  \
+  another file, or if a more specific header might achieve the same goal. \
+  See NOTE: [Tensor vs. TensorBase]
+#endif
+
+#if defined(AT_PER_OPERATOR_HEADERS) && defined(TORCH_ASSERT_ONLY_METHOD_OPERATORS)
+#error This change adds a dependency on all pytorch operators, meaning the     \
+  file will need to be re-compiled every time an operator is changed or added. \
+  Consider including a specific operator from <ATen/ops/{my_operator}.h> and   \
+  see NOTE [TORCH_ASSERT_ONLY_METHOD_OPERATORS].
+#endif
+
+// NOTE: [TORCH_ASSERT_ONLY_METHOD_OPERATORS]
+//
+// In ATen, certain generated headers files include the definitions of
+// every single operator in PyTorch. Unfortunately this means every
+// time an operator signature is updated or changed in
+// native_functions.yaml, you (and every other PyTorch developer) need
+// to recompile every source file that includes any of these headers.
+//
+// To break up these header dependencies, and improve incremental
+// build times for all PyTorch developers. These headers are split
+// into per-operator headers in the `ATen/ops` folder. This limits
+// incremental builds to only changes to methods of `Tensor`, or files
+// that use the specific operator being changed. With `at::sum` as an
+// example, you should include
+//
+//   <ATen/ops/sum.h>               // instead of ATen/Functions.h
+//   <ATen/ops/sum_native.h>        // instead of ATen/NativeFunctions.h
+//   <ATen/ops/sum_ops.h>           // instead of ATen/Operators.h
+//   <ATen/ops/sum_cpu_dispatch.h>  // instead of ATen/CPUFunctions.h
+//
+// However, even if you're careful to use this in your own code.
+// `Functions.h` might be included indirectly through another header
+// without you realising. To avoid this, you can add
+//
+//   #define TORCH_ASSERT_ONLY_METHOD_OPERATORS
+//
+// to the top of your source file. This way any time the non-specific
+// headers are included, the compiler will error out.
+//
+// Also, be aware that `ops` are not available in all build
+// configurations (namely fb-internal) so you must guard these
+// includes with `#ifdef AT_PER_OPERATOR_HEADERS`. e.g.
+//
+//   #ifndef AT_PER_OPERATOR_HEADERS
+//   #include <ATen/Functions.h>
+//   #else
+//   #include <ATen/ops/sum.h>
+//   #endif
+
+#include <ATen/Context.h>
+#include <ATen/DeviceGuard.h>
+#include <ATen/TensorUtils.h>
+#include <ATen/TracerMode.h>
+#include <ATen/core/Generator.h>
+#include <ATen/core/Reduction.h>
+#include <c10/core/SymInt.h>
+#include <ATen/core/Tensor.h>
+#include <c10/core/Scalar.h>
+#include <c10/core/Storage.h>
+#include <c10/core/TensorOptions.h>
+#include <c10/util/Deprecated.h>
+#include <optional>
+#include <c10/util/OptionalArrayRef.h>
+
+#include <ATen/ops/from_blob.h>
+#include <ATen/ops/tensor.h>
+
+${Functions_includes}
+
+namespace at {
+
+${Functions_declarations}
+
+// Special C++ only overloads for std()-like functions (See gh-40287)
+// These are needed because int -> bool conversion takes precedence over int -> IntArrayRef
+// So, for example std(0) would select the std(unbiased=False) overload
+inline Tensor var(const Tensor& self, int dim) {
+  return at::var(self, IntArrayRef{dim});
+}
+inline std::tuple<Tensor, Tensor> var_mean(const Tensor& self, int dim) {
+  return at::var_mean(self, IntArrayRef{dim});
+}
+inline Tensor std(const Tensor& self, int dim) {
+  return at::std(self, IntArrayRef{dim});
+}
+inline std::tuple<Tensor, Tensor> std_mean(const Tensor& self, int dim) {
+  return at::std_mean(self, IntArrayRef{dim});
+}
+
+inline int64_t numel(const Tensor& tensor) {
+  return tensor.numel();
+}
+
+inline int64_t size(const Tensor& tensor, int64_t dim) {
+  return tensor.size(dim);
+}
+
+inline int64_t stride(const Tensor& tensor, int64_t dim) {
+  return tensor.stride(dim);
+}
+
+inline bool is_complex(const Tensor& tensor) {
+  return tensor.is_complex();
+}
+
+inline bool is_floating_point(const Tensor& tensor) {
+  return tensor.is_floating_point();
+}
+
+inline bool is_signed(const Tensor& tensor) {
+  return tensor.is_signed();
+}
+
+inline bool is_inference(const Tensor& tensor) {
+  return tensor.is_inference();
+}
+
+inline bool _is_zerotensor(const Tensor& tensor) {
+  return tensor._is_zerotensor();
+}
+
+inline bool is_conj(const Tensor& tensor) {
+  return tensor.is_conj();
+}
+
+inline Tensor conj(const Tensor& tensor) {
+  return tensor.conj();
+}
+
+inline bool is_neg(const Tensor& tensor) {
+  return tensor.is_neg();
+}
+
+}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/LazyIr.h

@@ -0,0 +1,19 @@
+#pragma once
+
+// This file contains autogenerated LazyTensor IR nodes
+${lazy_ir_sysinc}
+${lazy_ir_inc}
+
+${namespace_prologue}
+using at::operator<<;
+
+// kNullValue is used to contribute a static hash value any time
+// a node has an Optional<Value> input that is nullopt.  It is important
+// to differentiate between HASH(std::nullopt, something) and HASH(something, std::nullopt),
+// and using kNullValue in the hash function in the order of arguments
+// serves this purpose.
+static const torch::lazy::Value kNullValue = torch::lazy::Value();
+
+${ir_declarations}
+
+${namespace_epilogue}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/LazyNonNativeIr.h

@@ -0,0 +1,11 @@
+#pragma once
+
+${lazy_non_native_ir_inc}
+
+// This file contains autogenerated LazyTensor Non Native IR nodes
+
+${namespace_prologue}
+
+${non_native_ir_nodes}
+
+${namespace_epilogue}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/MethodOperators.h

@@ -0,0 +1,24 @@
+#pragma once
+
+// ${generated_comment}
+
+#ifdef TORCH_ASSERT_NO_OPERATORS
+#error This change adds a dependency on native_functions.yaml,             \
+  meaning the file will need to be re-compiled every time an operator      \
+  is changed or added. Consider if your change would be better placed in   \
+  another file, or if a more specific header might achieve the same goal.  \
+  See NOTE: [Tensor vs. TensorBase]
+#endif
+
+// Forward declarations of any types needed in the operator signatures.
+// We can't directly include these classes because it will cause circular include dependencies.
+// This file is included by TensorBody.h, which defines the Tensor class.
+#include <ATen/core/ATen_fwd.h>
+
+${MethodOperators_includes}
+
+namespace at {
+namespace _ops {
+${MethodOperators_declarations}
+} // namespace _ops
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/NativeFunction.h

@@ -0,0 +1,17 @@
+#pragma once
+
+// ${generated_comment}
+
+#include <c10/core/Scalar.h>
+#include <c10/core/Storage.h>
+#include <c10/core/TensorOptions.h>
+#include <c10/util/Deprecated.h>
+#include <optional>
+#include <c10/core/QScheme.h>
+#include <ATen/core/Reduction.h>
+#include <ATen/core/Tensor.h>
+#include <tuple>
+#include <vector>
+${extra_includes}
+
+${native_function_declarations}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/NativeFunctions.h

@@ -0,0 +1,33 @@
+#pragma once
+
+// ${generated_comment}
+
+#ifdef TORCH_ASSERT_NO_OPERATORS
+#error This change adds a dependency on native_functions.yaml,            \
+  meaning the file will need to be re-compiled every time an operator     \
+  is changed or added. Consider if your change would be better placed in  \
+  another file, or if a more specific header might achieve the same goal. \
+  See NOTE: [Tensor vs. TensorBase]
+#endif
+
+#if defined(AT_PER_OPERATOR_HEADERS) && defined(TORCH_ASSERT_ONLY_METHOD_OPERATORS)
+#error This change adds a dependency on all pytorch operators, meaning the      \
+  file will need to be re-compiled every time an operator is changed or added.  \
+  Consider including a specific operator from <ATen/ops/{my_operator}_native.h> \
+  and see NOTE [TORCH_ASSERT_ONLY_METHOD_OPERATORS].
+#endif
+
+#include <c10/core/Scalar.h>
+#include <c10/core/Storage.h>
+#include <c10/core/TensorOptions.h>
+#include <c10/util/Deprecated.h>
+#include <optional>
+#include <c10/core/QScheme.h>
+#include <ATen/core/Reduction.h>
+#include <ATen/core/Tensor.h>
+#include <tuple>
+#include <vector>
+
+${NativeFunctions_includes}
+
+${NativeFunctions_declarations}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/NativeMetaFunction.h

@@ -0,0 +1,23 @@
+#pragma once
+
+// ${generated_comment}
+
+#include <c10/core/Scalar.h>
+#include <c10/core/Storage.h>
+#include <c10/core/TensorOptions.h>
+#include <c10/util/Deprecated.h>
+#include <optional>
+#include <c10/core/QScheme.h>
+#include <ATen/core/Reduction.h>
+#include <ATen/TensorIterator.h>
+#include <ATen/TensorMeta.h>
+#include <tuple>
+#include <vector>
+
+namespace at {
+namespace meta {
+
+${meta_function_declarations}
+
+} // namespace native
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/NativeMetaFunctions.h

@@ -0,0 +1,19 @@
+#pragma once
+
+// ${generated_comment}
+
+#include <ATen/core/Tensor.h>
+#include <ATen/core/IListRef.h>
+#include <ATen/TensorMeta.h>
+#include <ATen/TensorIterator.h>
+
+${NativeMetaFunctions_includes}
+
+namespace at {
+
+namespace meta {
+
+${NativeMetaFunctions_declarations}
+
+} // namespace meta
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/Operator.h

@@ -0,0 +1,19 @@
+#pragma once
+
+// ${generated_comment}
+
+#include <string_view>
+#include <tuple>
+#include <vector>
+
+// Forward declarations of any types needed in the operator signatures.
+// We can't directly include these classes because it will cause circular include dependencies.
+// This file is included by TensorBody.h, which defines the Tensor class.
+#include <ATen/core/ATen_fwd.h>
+
+namespace at {
+namespace _ops {
+
+${declarations}
+
+}} // namespace at::_ops

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/Operators.cpp

@@ -0,0 +1,19 @@
+#include <ATen/Tensor.h>
+#include <ATen/core/dispatch/Dispatcher.h>
+
+// ${generated_comment}
+// NOTE See [Sharded File] comment in VariableType
+
+#ifndef AT_PER_OPERATOR_HEADERS
+#include <ATen/Operators.h>
+#else
+${operator_headers}
+#endif
+
+${static_dispatch_extra_headers}
+
+namespace at { namespace _ops {
+
+${definitions}
+
+}} // namespace at::_ops

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/Operators.h

@@ -0,0 +1,74 @@
+#pragma once
+
+// ${generated_comment}
+
+#ifdef TORCH_ASSERT_NO_OPERATORS
+#error This change adds a dependency on native_functions.yaml,             \
+  meaning the file will need to be re-compiled every time an operator      \
+  is changed or added. Consider if your change would be better placed in   \
+  another file, or if a more specific header might achieve the same goal.  \
+  See NOTE: [Tensor vs. TensorBase]
+#endif
+
+#if defined(AT_PER_OPERATOR_HEADERS) && defined(TORCH_ASSERT_ONLY_METHOD_OPERATORS)
+#error This change adds a dependency on all pytorch operators, meaning the     \
+  file will need to be re-compiled every time an operator is changed or added. \
+  Consider including a specific operator from <ATen/ops/{my_operator}_ops.h>   \
+  and see NOTE [TORCH_ASSERT_ONLY_METHOD_OPERATORS].
+#endif
+
+#include <c10/core/SymInt.h>
+#include <c10/core/SymIntArrayRef.h>
+#include <c10/core/Scalar.h>
+#include <c10/core/TensorOptions.h>
+#include <c10/core/QScheme.h>
+#include <c10/util/OptionalArrayRef.h>
+#include <tuple>
+#include <vector>
+
+${Operators_includes}
+
+// Extension writers: do you write wrapper functions? Are you frustrated with
+// resolving overloads of operators? Are you frustrated with dealing with
+// pointer-to-methods and resolving overloads of pointer-to-methods?? Look no
+// further, this is the utility for you.
+//
+// Given an operator schema: aten::op.overload(...
+//
+// Use ATEN_FN2(op, overload) to get a *function* version of the operator
+// that is guaranteed to not be overloaded. This means that you can safely
+// decltype(&ATEN_FN2(op, overload)) it. NB: the 2 means this macro takes 2 args.
+//
+// Given an operator schema without an overload name: aten::op(...
+//
+// Use ATEN_FN(op) to get an unambiguous *function* version of the operator.
+//
+// There is some interesting behavior for out= operations.
+// ATEN_FN2(sin, out) gives a function that is *faithful* to the schema;
+// that is, the order of arguments is exactly what it looks like in the schema.
+
+#define ATEN_FN2(op_name, overload) at::_ops::op_name##_##overload::call
+#define ATEN_FN(op_name) at::_ops::op_name::call
+
+// Separately, ATEN_OP(op) and ATEN_OP2(op, overload) define a class containing compile-time
+// metadata about a given aten operator.
+// Notable data on the class includes:
+// - ATEN_OP2(add, Tensor)::name // returns the string name: "add"
+// - ATEN_OP2(add, Tensor)::overload_name // returns the string overload name: "Tensor"
+// - ATEN_OP2(add, Tensor)::schema // returns the C++ schema type: at::Tensor (const at::Tensor &, const at::Tensor &, const at::Scalar &)
+// - ATEN_OP2(add, Tensor)::schema_str // returns the string jit type: "add.Tensor(Tensor self, Tensor other, *, Scalar alpha=1) -> Tensor"
+
+#define ATEN_OP2(op_name, overload) at::_ops::op_name##_##overload
+#define ATEN_OP(op_name) at::_ops::op_name
+
+// WARNING: Please do not call any of the ops in the _ops namespace directly.
+// Use the ATEN_FN macros. We do not guarantee stability of the naming
+// scheme for the functions in at::_ops
+
+// See Note [The ATen Operators API] for details of the at::_ops namespace
+
+namespace at {
+namespace _ops {
+${Operators_declarations}
+} // namespace _ops
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/RedispatchFunctions.cpp

@@ -0,0 +1,15 @@
+// ${generated_comment}
+
+#include <ATen/RedispatchFunctions.h>
+#include <ATen/Functions.h>
+
+#include <ATen/core/dispatch/Dispatcher.h>
+#include <ATen/core/op_registration/adaption.h>
+
+namespace at {
+
+namespace redispatch {
+    ${function_redispatch_definitions}
+} // namespace redispatch
+
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/RedispatchFunctions.h

@@ -0,0 +1,32 @@
+#pragma once
+
+// ${generated_comment}
+
+#ifdef TORCH_ASSERT_ONLY_METHOD_OPERATORS
+#error This change adds a dependency on all pytorch operators, meaning the     \
+  file will need to be re-compiled every time an operator is changed or added. \
+  Consider using the at::_ops::{name}::redispatch() interface by including     \
+  the specific operator from <ATen/ops/{my_operator}_ops.h>
+#endif
+
+#include <c10/core/Scalar.h>
+#include <ATen/Tensor.h>
+#include <c10/core/Storage.h>
+#include <ATen/core/Generator.h>
+#include <c10/util/Deprecated.h>
+#include <ATen/DeviceGuard.h>
+#include <c10/core/TensorOptions.h>
+#include <ATen/core/Reduction.h>
+#include <optional>
+#include <ATen/TensorUtils.h>
+#include <ATen/Context.h>
+#include <ATen/TracerMode.h>
+#include <ATen/Operators.h>
+
+namespace at {
+
+namespace redispatch {
+    ${function_redispatch_definitions}
+} // namespace redispatch
+
+}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/RegisterBackendSelect.cpp

@@ -0,0 +1,29 @@
+// We register ops with a higher priority dispatch key (BackendSelect) than the usual backend-specific keys (e.g. CPU)
+// which makes calls to the factory functions dispatch to here.
+// We then 'manually' compute a lower-priority to re-dispatch to (e.g. CPU) to get to the eventually correct backend.
+// ${generated_comment}
+
+#define TORCH_ASSERT_ONLY_METHOD_OPERATORS
+#include <ATen/core/Tensor.h>
+#include <ATen/core/dispatch/DispatchKeyExtractor.h>
+#include <torch/library.h>
+
+#ifndef AT_PER_OPERATOR_HEADERS
+#include <ATen/Operators.h>
+#else
+
+${ops_headers}
+#endif
+
+namespace at {
+
+namespace {
+
+${backend_select_method_definitions}
+
+TORCH_LIBRARY_IMPL(aten, BackendSelect, m) {
+  ${backend_select_function_registrations};
+}
+
+} // namespace
+} // at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/RegisterCodegenUnboxedKernels.cpp

@@ -0,0 +1,41 @@
+#include <torch/csrc/jit/runtime/operator.h>
+#include <torch/csrc/jit/runtime/custom_operator.h>
+#include <torch/csrc/jit/runtime/register_ops_utils.h>
+
+#include <ATen/UnboxingFunctions.h>
+
+// ${generated_comment}
+
+// NOTE [Sharded File]: This file is generated in a sharded fashion to speed up
+// incremental rebuilds. See the comment at the top of
+// templates/VariableType.cpp for an analogous, in-depth discussion.
+//
+// Generated by tools/jit/gen_unboxing.py. This file registers all ATen ops into JIT op registry instead of c10
+// dispatcher. JIT op registry only takes boxed kernels, so we are calling unboxing functions in UnboxingFunctions.h
+// to cast arguments into C++ types (instead of IValue) and delegate to unboxed kernels.
+
+namespace torch { namespace jit {
+
+using autograd::Variable;
+using autograd::variable_list;
+using at::Scalar;
+using at::ScalarType;
+using at::Tensor;
+using at::TensorOptions;
+using at::DeviceGuard;
+
+using ::c10::fmap;
+using ::c10::filter;
+
+namespace {
+
+RegisterOperators reg({
+
+    // Generated operators
+    ${unboxed_ops}
+});
+
+} // anon namespace
+
+
+}} // namespace torch::jit

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/RegisterDispatchDefinitions.ini

@@ -0,0 +1,22 @@
+${ns_prologue}
+
+// NB: TORCH_LIBRARY_IMPL must be in an anonymous namespace to avoid
+// ambiguity with conflicting identifiers that may have been defined in
+// at namespace already.
+namespace {
+
+${dispatch_anonymous_definitions}
+
+${static_init_dispatch_registrations}
+
+} // anonymous namespace
+
+${deferred_dispatch_registrations}
+
+namespace ${dispatch_namespace} {
+
+${dispatch_namespaced_definitions}
+
+} // namespace ${dispatch_namespace}
+
+${ns_epilogue}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/RegisterDispatchKey.cpp

@@ -0,0 +1,51 @@
+// an external backend might generate file within its code tree
+// and check all the source files within the tree with clang-format.
+// so, disable it since the backend might have a different config.
+// clang-format off
+
+// NOTE: This condition is true for all PyTorch internal libraries, it
+//       just excludes external projects such as torch_xla which
+//       reuse some of the PyTorch codegen machinery.
+#if defined(CAFFE2_BUILD_MAIN_LIB)        || \
+    defined(TORCH_CUDA_BUILD_MAIN_LIB)    || \
+    defined(TORCH_XPU_BUILD_MAIN_LIB)
+#define TORCH_ASSERT_ONLY_METHOD_OPERATORS
+#endif
+
+// ${generated_comment}
+
+#include <c10/core/TensorImpl.h>
+#include <c10/core/Allocator.h>
+#include <ATen/DeviceGuard.h>
+#include <ATen/NamedTensorUtils.h>
+#include <ATen/Utils.h>
+#include <ATen/WrapDimUtils.h>
+#include <ATen/Dispatch.h>
+#include <c10/util/ExclusivelyOwned.h>
+#include <c10/util/Half.h>
+#include <c10/core/UndefinedTensorImpl.h>
+#include <optional>
+#include <ATen/Tensor.h>
+#include <ATen/native/Resize.h>
+
+#include <cstddef>
+#include <functional>
+#include <memory>
+#include <utility>
+
+#include <ATen/Config.h>
+#include <ATen/core/op_registration/adaption.h>
+#include <torch/library.h>
+$extra_cuda_headers
+$external_backend_headers
+$dispatch_headers
+$ops_headers
+
+namespace at {
+namespace {
+$dispatch_helpers
+} // namespace
+} // namespace at
+
+// See template file RegisterDispatchDefinitions.ini
+$dispatch_definitions

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/RegisterFunctionalization.cpp

@@ -0,0 +1,116 @@
+#define TORCH_ASSERT_ONLY_METHOD_OPERATORS
+// ${generated_comment}
+
+#include <ATen/core/LegacyTypeDispatch.h>
+#include <ATen/EmptyTensor.h>
+#include <ATen/FunctionalTensorWrapper.h>
+#include <ATen/ViewMetaClasses.h>
+#include <ATen/MemoryOverlap.h>
+#include <torch/library.h>
+
+#include <c10/util/env.h>
+#ifndef AT_PER_OPERATOR_HEADERS
+#include <ATen/Operators.h>
+#include <ATen/NativeFunctions.h>
+#else
+// needed for the meta tensor calls to get stride info in functionalization
+#include <ATen/ops/empty_strided_native.h>
+// needed for special handling of copy_().
+// See Note [functionalizating copy_() and not preserving strides]
+#include <ATen/ops/to_ops.h>
+#include <ATen/ops/expand_copy_ops.h>
+
+$ops_headers
+#endif
+
+namespace at {
+namespace functionalization {
+
+// This keyset is used by functionalization when it calls into meta kernels
+// to accurately propagate stride metadata.
+// Exclude any modes: the purpose of calling into meta kernels is only as an implementation
+// detail to perform shape inference, and we don't want any modal keys to run.
+// Specifically, we want to prevent functionalization and Python modes from running.
+constexpr auto exclude_keys_for_meta_dispatch =
+    c10::functorch_transforms_ks |
+    c10::DispatchKeySet({
+        c10::DispatchKey::FuncTorchDynamicLayerBackMode,
+        c10::DispatchKey::FuncTorchDynamicLayerFrontMode,
+        c10::DispatchKey::Python,
+        c10::DispatchKey::PreDispatch,
+
+    });
+
+// Helper around at::has_internal_overlap.
+// The ATen util is used in hot-path eager mode: it's always fast,
+// but might return TOO_HARD sometimes.
+// During functionalization, we're ok taking a bit longer
+// to detect memory overlap.
+inline bool has_internal_overlap_helper(const at::Tensor t) {
+  auto has_overlap = at::has_internal_overlap(t);
+  if (has_overlap == at::MemOverlap::Yes) return true;
+  if (has_overlap == at::MemOverlap::No) return false;
+  return false;
+}
+
+
+inline Tensor to_meta(const Tensor& t) {
+    if (!t.defined()) return t;
+    return at::native::empty_strided_meta_symint(t.sym_sizes(), t.sym_strides(),
+/*dtype=*/t.scalar_type(), /*layout=*/t.layout(),
+/*device=*/c10::Device(kMeta), /*pin_memory=*/std::nullopt);
+}
+
+inline std::optional<Tensor> to_meta(const std::optional<Tensor>& t) {
+  if (t.has_value()) {
+    return to_meta(*t);
+  }
+  return std::nullopt;
+}
+
+inline std::vector<Tensor> to_meta(at::ITensorListRef t_list) {
+  std::vector<Tensor> outputs;
+  outputs.reserve(t_list.size());
+  for (const auto& tensor : t_list) {
+    outputs.push_back(to_meta(tensor));
+  }
+  return outputs;
+}
+
+inline c10::List<Tensor> to_meta(const c10::List<Tensor>& t_list) {
+  c10::List<Tensor> outputs;
+  outputs.reserve(t_list.size());
+  for (const auto i : c10::irange(t_list.size())) {
+    outputs.push_back(to_meta(t_list[i]));
+  }
+  return outputs;
+}
+
+inline c10::List<::std::optional<Tensor>> to_meta(const c10::List<::std::optional<Tensor>>& t_list) {
+  c10::List<::std::optional<Tensor>> outputs;
+  outputs.reserve(t_list.size());
+  for (const auto i : c10::irange(t_list.size())) {
+    outputs.push_back(to_meta(t_list[i]));
+  }
+  return outputs;
+}
+
+static bool disable_meta_reference() {
+  static auto env = c10::utils::get_env("TORCH_DISABLE_FUNCTIONALIZATION_META_REFERENCE");
+  return env == "1";
+}
+
+
+${func_definitions}
+
+}  // namespace functionalization
+
+namespace {
+
+TORCH_LIBRARY_IMPL(aten, Functionalize, m) {
+  ${func_registrations};
+}
+
+}  // namespace
+
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/RegisterSchema.cpp

@@ -0,0 +1,13 @@
+// ${generated_comment}
+#define TORCH_ASSERT_ONLY_METHOD_OPERATORS
+#include <torch/library.h>
+
+namespace at {
+TORCH_LIBRARY(aten, m) {
+  ${aten_schema_registrations};
+  // Distributed Ops
+  // Implementations located in torch/csrc/jit/runtime/register_distributed_ops.cpp
+  m.def("get_gradients(int context_id) -> Dict(Tensor, Tensor)");
+}
+${schema_registrations}
+}  // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/RegistrationDeclarations.h

@@ -0,0 +1,4 @@
+// This file contains all native_functions that can be registered to
+// and the schema string that they should be registered with
+
+${registration_declarations}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/TensorBody.h

@@ -0,0 +1,758 @@
+#pragma once
+
+#ifdef TORCH_ASSERT_NO_OPERATORS
+#error This change adds a dependency on native_functions.yaml,            \
+  meaning the file will need to be re-compiled every time an operator     \
+  is changed or added. Consider if your change would be better placed in  \
+  another file, or if a more specific header might achieve the same goal. \
+  See NOTE: [Tensor vs. TensorBase]
+#endif
+
+#include <c10/core/Device.h>
+#include <c10/core/Layout.h>
+#include <c10/core/MemoryFormat.h>
+#include <c10/core/QScheme.h>
+#include <c10/core/Stream.h>
+#include <c10/core/Scalar.h>
+#include <c10/core/ScalarType.h>
+#include <c10/core/ScalarTypeToTypeMeta.h>
+#include <c10/core/Storage.h>
+#include <c10/core/TensorImpl.h>
+#include <c10/core/UndefinedTensorImpl.h>
+#include <c10/core/WrapDimMinimal.h>
+#include <c10/util/Exception.h>
+#include <c10/util/ExclusivelyOwned.h>
+#include <c10/util/Deprecated.h>
+#include <c10/util/MaybeOwned.h>
+#include <optional>
+#include <c10/util/OptionalArrayRef.h>
+#include <c10/util/intrusive_ptr.h>
+#include <c10/macros/Export.h>
+#include <c10/macros/Macros.h>
+#include <ATen/core/CheckMemoryFormat.h>
+#include <ATen/core/DeprecatedTypePropertiesRegistry.h>
+#include <ATen/core/DeprecatedTypeProperties.h>
+#include <ATen/core/NamedTensor.h>
+#include <ATen/core/QuantizerBase.h>
+#include <c10/core/SymInt.h>
+#include <ATen/core/TensorAccessor.h>
+#include <ATen/core/TensorBase.h>
+
+
+#include <ATen/MethodOperators.h>
+
+namespace c10{
+template<class T> class List;
+template<class T> class IListRef;
+}
+namespace at {
+struct Generator;
+struct Type;
+class DeprecatedTypeProperties;
+class Tensor;
+} // namespace at
+namespace at {
+namespace indexing {
+struct TensorIndex;
+} // namespace indexing
+} // namespace at
+
+namespace torch { namespace autograd {
+
+struct Node;
+
+}} // namespace torch::autograd
+
+namespace at {
+
+class OptionalTensorRef;
+class TensorRef;
+class Tensor;
+using TensorList = ArrayRef<Tensor>;
+using ITensorList = c10::IListRef<Tensor>;
+
+using Stream = c10::Stream;
+
+// Tensor is a "generic" object holding a pointer to the underlying TensorImpl object, which
+// has an embedded reference count. In this way, Tensor is similar to boost::intrusive_ptr.
+//
+// For example:
+//
+// void func(Tensor a) {
+//   Tensor b = a;
+//   ...
+// }
+//
+// In this example, when we say Tensor b = a, we are creating a new object that points to the
+// same underlying TensorImpl, and bumps its reference count. When b goes out of scope, the
+// destructor decrements the reference count by calling release() on the TensorImpl it points to.
+// The existing constructors, operator overloads, etc. take care to implement the correct semantics.
+//
+// Note that Tensor can also be NULL, i.e. it is not associated with any underlying TensorImpl, and
+// special care must be taken to handle this.
+class TORCH_API Tensor: public TensorBase {
+ protected:
+  // Create a Tensor with a +0 reference count. Special care must be
+  // taken to avoid decrementing this reference count at destruction
+  // time. Intended to support MaybeOwnedTraits<Tensor>.
+  explicit Tensor(unsafe_borrow_t, const TensorBase& rhs): TensorBase(unsafe_borrow_t{}, rhs) {}
+  friend MaybeOwnedTraits<Tensor>;
+  friend OptionalTensorRef;
+  friend TensorRef;
+
+ public:
+  Tensor() = default;
+  // This constructor should not be used by end users and is an implementation
+  // detail invoked by autogenerated code.
+  explicit Tensor(
+      c10::intrusive_ptr<TensorImpl, UndefinedTensorImpl> tensor_impl)
+      : TensorBase(std::move(tensor_impl)) {}
+  Tensor(const Tensor &tensor) = default;
+  Tensor(Tensor &&tensor) = default;
+
+  // Implicitly move-constructible from TensorBase, but must be explicit to increase refcount
+  explicit Tensor(const TensorBase &base): TensorBase(base) {}
+  /*implicit*/ Tensor(TensorBase &&base): TensorBase(std::move(base)) {}
+
+  // Creates a new wrapper from TensorImpl. Intentionally a free method because
+  // it should be used with care. Checks necessary invariants
+  static Tensor wrap_tensor_impl(
+      c10::intrusive_ptr<TensorImpl, UndefinedTensorImpl> tensor_impl) {
+    return TensorBase::wrap_tensor_impl(std::move(tensor_impl));
+  }
+
+  Tensor contiguous(MemoryFormat memory_format=MemoryFormat::Contiguous) const {
+    return TensorBase::contiguous(memory_format);
+  }
+
+  Tensor conj() const {
+    if (!this->is_complex()) {
+      return *this;
+    }
+
+    C10_DIAGNOSTIC_PUSH_AND_IGNORED_IF_DEFINED("-Wswitch-enum")
+    switch (this->layout()) {
+      case at::kSparse:
+      case at::kSparseCsr:
+      case at::kSparseCsc:
+      case at::kSparseBsr:
+      case at::kSparseBsc:
+        return this->conj_physical();
+      default:
+        return this->_conj();
+    }
+    C10_DIAGNOSTIC_POP()
+  }
+
+  // Aliased by Dimname overloads, so need explicit using
+  using TensorBase::size;
+  using TensorBase::sym_size;
+  using TensorBase::stride;
+
+  /// Should be used if *this can reasonably be expected to be contiguous and
+  /// performance is important.
+  /// Compared to contiguous, it saves a reference count
+  /// increment/decrement if *this is already contiguous, at the cost
+  /// in all cases of an extra pointer of stack usage, an extra branch
+  /// to access, and an extra branch at destruction time.
+  c10::MaybeOwned<Tensor> expect_contiguous(MemoryFormat memory_format=MemoryFormat::Contiguous) const &;
+
+  // Use .contiguous() instead. Trying to borrow from a prvalue Tensor
+  // will only lead to trouble and dangling references.
+  c10::MaybeOwned<Tensor> expect_contiguous(MemoryFormat memory_format=MemoryFormat::Contiguous) && = delete;
+
+  // The following overloads are very intriguing.  Consider the following
+  // program:
+  //
+  //    x[1] = 3;
+  //
+  // We would expect that the first entry of x is written to 3.  But how can we
+  // actually achieve this?  x[1] evaluates to a tensor...
+  //
+  // The answer is, using a ref-qualifier.  x[1] is an rvalue, which cannot be
+  // (profitably) assigned to in the traditional sense, so we overload
+  // assignment to mean, "Actually, copy 3 into the tensor data."  This is done
+  // with an rvalue-reference ref-qualified overload (the methods with && at the
+  // end of their type.)
+  //
+  // There's one more fly in the ointment: We also want
+  //
+  //    Tensor x = y;
+  //
+  // to work, and we want it NOT to copy.  So we need a traditional operator=
+  // overload.  But we MUST specify a mutable lvalue ref-qualifier, to
+  // disambiguate the traditional overload from the rvalue-reference
+  // ref-qualified overload.  Otherwise, it will be ambiguous, because
+  // a non ref-qualified method is eligible for all situations.
+
+  // Unfortunately, we have to write these constructors out manually
+  // to work around an MSVC bug:
+  //    error C2580: 'at::Tensor &at::Tensor::operator =(const at::Tensor &) &':
+  //    multiple versions of a defaulted special member functions are not allowed
+  // Tensor& operator=(const Tensor&) & = default;
+  // Tensor& operator=(Tensor&&) & = default;
+
+  // Also MSVC will wrongly issue the following warning with the aforementioned fix
+  //    warning C4522: 'at::Tensor': multiple assignment operators specified
+  // Let's just skip the warning.
+  //
+  // TODO: temporarily disabled
+
+  Tensor& operator=(const TensorBase& x) & noexcept {
+    impl_ = x.getIntrusivePtr();
+    return *this;
+  }
+  Tensor& operator=(TensorBase&& x) & noexcept {
+    impl_ = x.unsafeReleaseIntrusivePtr();
+    return *this;
+  }
+
+  Tensor& operator=(const Tensor &x) & noexcept {
+    return operator=(static_cast<const TensorBase&>(x));
+  }
+  Tensor& operator=(Tensor &&x) & noexcept {
+    return operator=(static_cast<TensorBase&&>(x));
+  }
+
+  Tensor& operator=(const Scalar &v) && {
+    return fill_(v);
+  }
+  Tensor& operator=(const Tensor &rhs) && {
+    return copy_(rhs);
+  }
+
+  // NOLINTNEXTLINE(performance-noexcept-move-constructor)
+  Tensor& operator=(Tensor&& rhs) && {
+    return copy_(rhs);
+  }
+
+  C10_DEPRECATED_MESSAGE("Tensor.type() is deprecated. Instead use Tensor.options(), which in many cases (e.g. in a constructor) is a drop-in replacement. If you were using data from type(), that is now available from Tensor itself, so instead of tensor.type().scalar_type(), use tensor.scalar_type() instead and instead of tensor.type().backend() use tensor.device().")
+  DeprecatedTypeProperties & type() const {
+    return globalDeprecatedTypePropertiesRegistry().getDeprecatedTypeProperties(
+        dispatchKeyToBackend(legacyExtractDispatchKey(key_set())),
+        scalar_type());
+  }
+
+  Tensor toType(ScalarType t) const {
+    return to(options().dtype(t), /*non_blocking*/ false, /*copy*/ false);
+  }
+
+  // TODO: Deprecate me
+  Tensor toBackend(Backend b) const {
+    return to(options().device(backendToDeviceType(b)).layout(layout_from_backend(b)), /*non_blocking*/ false, /*copy*/ false);
+  }
+
+  C10_DEPRECATED_MESSAGE("Tensor.is_variable() is deprecated; everything is a variable now. (If you want to assert that variable has been appropriately handled already, use at::impl::variable_excluded_from_dispatch())")
+  bool is_variable() const noexcept {
+    return !at::impl::variable_excluded_from_dispatch();
+  }
+
+  template<typename T>
+  C10_DEPRECATED_MESSAGE("Tensor.data<T>() is deprecated. Please use Tensor.data_ptr<T>() instead.")
+  T * data() const {
+    return data_ptr<T>();
+  }
+
+  template <typename T>
+  T item() const;
+
+  template<typename T, size_t N, template <typename U> class PtrTraits = DefaultPtrTraits, typename index_t = int64_t>
+  C10_DEPRECATED_MESSAGE("packed_accessor is deprecated, use packed_accessor32 or packed_accessor64 instead")
+  GenericPackedTensorAccessor<T,N,PtrTraits,index_t> packed_accessor() const & {
+    return generic_packed_accessor<T,N,PtrTraits,index_t>();
+  }
+  template<typename T, size_t N, template <typename U> class PtrTraits = DefaultPtrTraits, typename index_t = int64_t>
+  C10_DEPRECATED_MESSAGE("packed_accessor is deprecated, use packed_accessor32 or packed_accessor64 instead")
+  GenericPackedTensorAccessor<T,N,PtrTraits,index_t> packed_accessor() && = delete;
+
+  Tensor operator~() const {
+    return bitwise_not();
+  }
+  Tensor operator-() const {
+    return neg();
+  }
+  Tensor& operator+=(const Tensor & other) {
+    return add_(other);
+  }
+  Tensor& operator+=(const Scalar & other) {
+    return add_(other);
+  }
+  Tensor& operator-=(const Tensor & other) {
+    return sub_(other);
+  }
+  Tensor& operator-=(const Scalar & other) {
+    return sub_(other);
+  }
+  Tensor& operator*=(const Tensor & other) {
+    return mul_(other);
+  }
+  Tensor& operator*=(const Scalar & other) {
+    return mul_(other);
+  }
+  Tensor& operator/=(const Tensor & other) {
+    return div_(other);
+  }
+  Tensor& operator/=(const Scalar & other) {
+    return div_(other);
+  }
+  Tensor& operator&=(const Tensor & other) {
+    return bitwise_and_(other);
+  }
+  Tensor& operator|=(const Tensor & other) {
+    return bitwise_or_(other);
+  }
+  Tensor& operator^=(const Tensor & other) {
+    return bitwise_xor_(other);
+  }
+  Tensor operator[](const Scalar & index) const {
+    if (!index.isIntegral(false)) {
+      TORCH_CHECK_INDEX(false, "Can only index tensors with integral scalars");
+    }
+    return this->operator[](index.toLong());
+  }
+  Tensor operator[](const Tensor & index) const {
+    // These properties are checked in the Scalar constructor, but we already
+    // check them here to provide more useful diagnostics for the user.
+    if (!index.defined()) {
+      TORCH_CHECK_INDEX(false, "Can only index with tensors that are defined");
+    }
+    if (index.dim() != 0) {
+      TORCH_CHECK_INDEX(false,
+                        "Can only index with tensors that are scalars (zero-dim)");
+    }
+    // The Scalar(Tensor) constructor is explicit, so we need to call it.
+    return this->operator[](index.item());
+  }
+  Tensor operator[](int64_t index) const {
+    return select(0, index);
+  }
+
+  Tensor index(ArrayRef<at::indexing::TensorIndex> indices) const;
+  Tensor index(std::initializer_list<at::indexing::TensorIndex> indices) const;
+
+  Tensor & index_put_(ArrayRef<at::indexing::TensorIndex> indices, Tensor const & rhs);
+  Tensor & index_put_(ArrayRef<at::indexing::TensorIndex> indices, const Scalar& v);
+  Tensor & index_put_(std::initializer_list<at::indexing::TensorIndex> indices, Tensor const & rhs);
+  Tensor & index_put_(std::initializer_list<at::indexing::TensorIndex> indices, const Scalar& v);
+
+  Tensor cpu() const {
+    return to(options().device(c10::DeviceType::CPU), /*non_blocking*/ false, /*copy*/ false);
+  }
+
+  // TODO: The Python version also accepts arguments
+  Tensor cuda() const {
+    return to(options().device(c10::DeviceType::CUDA), /*non_blocking*/ false, /*copy*/ false);
+  }
+
+  Tensor hip() const {
+    return to(options().device(c10::DeviceType::HIP), /*non_blocking*/ false, /*copy*/ false);
+  }
+
+  Tensor ve() const {
+    return to(options().device(c10::DeviceType::VE), /*non_blocking*/ false, /*copy*/ false);
+  }
+
+  Tensor vulkan() const {
+    return to(options().device(c10::DeviceType::Vulkan), /*non_blocking*/ false, /*copy*/ false);
+  }
+
+  Tensor metal() const {
+    return to(options().device(c10::DeviceType::Metal), /*non_blocking*/ false, /*copy*/ false);
+  }
+
+  Tensor meta() const {
+    return to(options().device(c10::DeviceType::Meta), /*non_blocking*/ false, /*copy*/ false);
+  }
+
+  // ~~~~~ Autograd API ~~~~~
+
+  /// \fn bool is_leaf() const;
+  ///
+  /// All Tensors that have `requires_grad()` which is ``false`` will be leaf Tensors by convention.
+  ///
+  /// For Tensors that have `requires_grad()` which is ``true``, they will be leaf Tensors if they were
+  /// created by the user. This means that they are not the result of an operation and so
+  /// `grad_fn()` is `nullptr`.
+  ///
+  /// Only leaf Tensors will have their `grad()` populated during a call to `backward()`.
+  /// To get `grad()` populated for non-leaf Tensors, you can use `retain_grad()`.
+  ///
+  /// Example:
+  /// @code
+  /// auto a = torch::rand(10, torch::requires_grad());
+  /// std::cout << a.is_leaf() << std::endl; // prints `true`
+  ///
+  /// auto b = torch::rand(10, torch::requires_grad()).to(torch::kCUDA);
+  /// std::cout << b.is_leaf() << std::endl; // prints `false`
+  /// // b was created by the operation that cast a cpu Tensor into a cuda Tensor
+  ///
+  /// auto c = torch::rand(10, torch::requires_grad()) + 2;
+  /// std::cout << c.is_leaf() << std::endl; // prints `false`
+  /// // c was created by the addition operation
+  ///
+  /// auto d = torch::rand(10).cuda();
+  /// std::cout << d.is_leaf() << std::endl; // prints `true`
+  /// // d does not require gradients and so has no operation creating it (that is tracked by the autograd engine)
+  ///
+  /// auto e = torch::rand(10).cuda().requires_grad_();
+  /// std::cout << e.is_leaf() << std::endl; // prints `true`
+  /// // e requires gradients and has no operations creating it
+  ///
+  /// auto f = torch::rand(10, torch::device(torch::kCUDA).requires_grad(true));
+  /// std::cout << f.is_leaf() << std::endl; // prints `true`
+  /// // f requires grad, has no operation creating it
+  /// @endcode
+
+  /// \fn void backward(const Tensor & gradient={}, std::optional<bool> retain_graph=std::nullopt, bool create_graph=false, std::optional<TensorList> inputs=std::nullopt) const;
+  ///
+  /// Computes the gradient of current tensor with respect to graph leaves.
+  ///
+  /// The graph is differentiated using the chain rule. If the tensor is
+  /// non-scalar (i.e. its data has more than one element) and requires
+  /// gradient, the function additionally requires specifying ``gradient``.
+  /// It should be a tensor of matching type and location, that contains
+  /// the gradient of the differentiated function w.r.t. this Tensor.
+  ///
+  /// This function accumulates gradients in the leaves - you might need to
+  /// zero them before calling it.
+  ///
+  /// \param gradient Gradient w.r.t. the
+  ///     tensor. If it is a tensor, it will be automatically converted
+  ///     to a Tensor that does not require grad unless ``create_graph`` is True.
+  ///     None values can be specified for scalar Tensors or ones that
+  ///     don't require grad. If a None value would be acceptable then
+  ///     this argument is optional.
+  /// \param retain_graph If ``false``, the graph used to compute
+  ///     the grads will be freed. Note that in nearly all cases setting
+  ///     this option to True is not needed and often can be worked around
+  ///     in a much more efficient way. Defaults to the value of
+  ///     ``create_graph``.
+  /// \param create_graph If ``true``, graph of the derivative will
+  ///     be constructed, allowing to compute higher order derivative
+  ///     products. Defaults to ``false``.
+  /// \param inputs Inputs w.r.t. which the gradient will be accumulated into
+  ///     ``at::Tensor::grad``. All other Tensors will be ignored. If not
+  ///     provided, the gradient is accumulated into all the leaf Tensors
+  ///     that were used to compute the current tensor.
+  ///     When inputs are provided and a given input is not a leaf,
+  ///     the current implementation will call its grad_fn (even though it is not strictly needed to get this gradients).
+  ///     It is an implementation detail on which the user should not rely.
+  ///     See https://github.com/pytorch/pytorch/pull/60521#issuecomment-867061780 for more details.
+  void backward(const Tensor & gradient={}, std::optional<bool> retain_graph=std::nullopt, bool create_graph=false, std::optional<TensorList> inputs=std::nullopt) const {
+    // NB: Adding this wrapper to _backward here because we'd like our
+    // 'backwards' api to accept the 'inputs' argument optionally. Since code gen
+    // currently does not support optional of TensorList our approach is to replace
+    // backward in native_functions.yaml with _backward and call it here instead.
+    if (inputs.has_value()) {
+      TORCH_CHECK(inputs.value().size() > 0, "'inputs' argument to backward cannot be empty")
+      this->_backward(inputs.value(), gradient, retain_graph, create_graph);
+    } else {
+      this->_backward({}, gradient, retain_graph, create_graph);
+    }
+  }
+
+  /// \fn Tensor detach() const;
+  ///
+  /// Returns a new Tensor, detached from the current graph.
+  /// The result will never require gradient.
+
+  /// \fn Tensor & detach_() const;
+  ///
+  /// Detaches the Tensor from the graph that created it, making it a leaf.
+  /// Views cannot be detached in-place.
+
+  /// \fn void retain_grad() const;
+  ///
+  /// Enables this Tensor to have their :attr:`grad` populated during
+  /// :func:`backward`. This is a no-op for leaf tensors.
+
+  /// \fn bool retains_grad() const;
+  ///
+  /// Is ``true`` if this Tensor is non-leaf and its :attr:`grad` is enabled to be
+  /// populated during :func:`backward`, ``false`` otherwise.
+
+  const Tensor& set_requires_grad(bool requires_grad) const {
+    TensorBase::set_requires_grad(requires_grad);
+    return *this;
+  }
+
+  /// Return a mutable reference to the gradient. This is conventionally
+  /// used as `t.grad() = x` to set a gradient to a completely new tensor.
+  /// Note that this function work with a non-const Tensor and is not
+  /// thread safe.
+  Tensor& mutable_grad() const {
+    return impl_->mutable_grad();
+  }
+
+  /// This function returns an undefined tensor by default and returns a defined tensor
+  /// the first time a call to `backward()` computes gradients for this Tensor.
+  /// The attribute will then contain the gradients computed and future calls
+  /// to `backward()` will accumulate (add) gradients into it.
+  const Tensor& grad() const {
+    const Tensor& maybe_grad = impl_->grad();
+    if (!is_leaf() && !retains_grad() && !maybe_grad.defined()) {
+      TORCH_WARN(
+        "The .grad attribute of a Tensor that is not a leaf Tensor is being accessed. Its .grad "
+        "attribute won't be populated during autograd.backward(). If you indeed want the .grad "
+        "field to be populated for a non-leaf Tensor, use .retain_grad() on the non-leaf Tensor. "
+        "If you access the non-leaf Tensor by mistake, make sure you access the leaf Tensor "
+        "instead. See github.com/pytorch/pytorch/pull/30531 for more information.");
+    }
+    return maybe_grad;
+  }
+
+  // The Forward AD API functions below are low level and are not to be used by end
+  // users who should use the API provided in torch/csrc/autograd.h
+
+  /// This function returns the forward gradient for this Tensor at the given level.
+  const Tensor& _fw_grad(uint64_t level) const {
+    return impl_->_fw_grad(level, *this);
+  }
+
+  /// This function can be used to set the value of the forward grad.
+  /// Note that the given new_grad might not be used directly if it has different
+  /// metadata (size/stride/storage offset) compared to this Tensor. In that case,
+  /// new_grad content will be copied into a new Tensor
+  void _set_fw_grad(const TensorBase& new_grad, uint64_t level, bool is_inplace_op) const {
+    impl_->_set_fw_grad(new_grad, *this, level, is_inplace_op);
+  }
+
+
+  // STOP.  Thinking of adding a method here, which only makes use
+  // of other ATen methods?  Define it in native_functions.yaml.
+
+  //example
+  //Tensor * add(Tensor & b);
+  ${tensor_method_declarations}
+
+  // Special C++ only overloads for std()-like functions (See gh-40287)
+  // These are needed because int -> bool conversion takes precedence over int -> IntArrayRef
+  // So, for example std(0) would select the std(unbiased=False) overload
+
+  Tensor var(int dim) const {
+    return var(IntArrayRef{dim});
+  }
+
+  Tensor std(int dim) const {
+    return std(IntArrayRef{dim});
+  }
+
+  // We changed .dtype() to return a TypeMeta in #12766. Ideally, we want the
+  // at::kDouble and its friends to be TypeMeta's, but that hasn't happened yet.
+  // Before that change, we make this method to maintain BC for C++ usage like
+  // `x.to(y.dtype)`.
+  // TODO: remove following two after at::kDouble and its friends are TypeMeta's.
+  inline Tensor to(caffe2::TypeMeta type_meta, bool non_blocking=false, bool copy=false) const {
+    return this->to(/*scalar_type=*/typeMetaToScalarType(type_meta), non_blocking, copy);
+  }
+  inline Tensor to(Device device, caffe2::TypeMeta type_meta, bool non_blocking=false, bool copy=false) const {
+    return this->to(device, /*scalar_type=*/typeMetaToScalarType(type_meta), non_blocking, copy);
+  }
+
+  template <typename F, typename... Args>
+  decltype(auto) m(F func, Args&&... params) const {
+    return func(*this, std::forward<Args>(params)...);
+  }
+
+  /// NOTE: This is similar to the legacy `.data()` function on `Variable`, and is intended
+  /// to be used from functions that need to access the `Variable`'s equivalent `Tensor`
+  /// (i.e. `Tensor` that shares the same storage and tensor metadata with the `Variable`).
+  ///
+  /// One notable difference with the legacy `.data()` function is that changes to the
+  /// returned `Tensor`'s tensor metadata (e.g. sizes / strides / storage / storage_offset)
+  /// will not update the original `Variable`, due to the fact that this function
+  /// shallow-copies the `Variable`'s underlying TensorImpl.
+  at::Tensor tensor_data() const {
+    return TensorBase::tensor_data();
+  }
+
+  /// NOTE: `var.variable_data()` in C++ has the same semantics as `tensor.data`
+  /// in Python, which create a new `Variable` that shares the same storage and
+  /// tensor metadata with the original `Variable`, but with a completely new
+  /// autograd history.
+  ///
+  /// NOTE: If we change the tensor metadata (e.g. sizes / strides /
+  /// storage / storage_offset) of a variable created from `var.variable_data()`, those
+  /// changes will not update the original variable `var`. In `.variable_data()`, we set
+  /// `allow_tensor_metadata_change_` to false to make such changes explicitly illegal,
+  /// in order to prevent users from changing metadata of `var.variable_data()`
+  /// and expecting the original variable `var` to also be updated.
+  at::Tensor variable_data() const {
+    return TensorBase::variable_data();
+  }
+
+  // Hooks
+  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+  template <typename T>
+  using hook_return_void_t = std::enable_if_t<std::is_void<typename std::invoke_result_t<T&, Tensor>>::value, unsigned>;
+  template <typename T>
+  using hook_return_var_t = std::enable_if_t<std::is_same_v<typename std::invoke_result_t<T&, Tensor>, Tensor>, unsigned>;
+
+  /// Registers a backward hook.
+  ///
+  /// The hook will be called every time a gradient with respect to the Tensor is computed.
+  /// The hook should have one of the following signature:
+  /// ```
+  /// hook(Tensor grad) -> Tensor
+  /// ```
+  /// ```
+  /// hook(Tensor grad) -> void
+  /// ```
+  /// The hook should not modify its argument, but it can optionally return a new gradient
+  /// which will be used in place of `grad`.
+  ///
+  /// This function returns the index of the hook in the list which can be used to remove hook.
+  ///
+  /// Example:
+  /// @code
+  /// auto v = torch::tensor({0., 0., 0.}, torch::requires_grad());
+  /// auto h = v.register_hook([](torch::Tensor grad){ return grad * 2; }); // double the gradient
+  /// v.backward(torch::tensor({1., 2., 3.}));
+  /// // This prints:
+  /// // ```
+  /// //  2
+  /// //  4
+  /// //  6
+  /// // [ CPUFloatType{3} ]
+  /// // ```
+  /// std::cout << v.grad() << std::endl;
+  /// v.remove_hook(h);  // removes the hook
+  /// @endcode
+  template <typename T>
+  hook_return_void_t<T> register_hook(T&& hook) const;
+  template <typename T>
+  hook_return_var_t<T> register_hook(T&& hook) const;
+
+  // Variable methods
+  //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+  Tensor data() const {
+    return TensorBase::data();
+  }
+
+  void _backward(TensorList inputs, const std::optional<Tensor>& gradient, std::optional<bool> keep_graph, bool create_graph) const;
+
+  const Tensor& requires_grad_(bool _requires_grad=true) const {
+    TensorBase::requires_grad_(_requires_grad);
+    return *this;
+  }
+};
+
+namespace detail {
+// Helper creator for Tensor class which doesn't requires the users to pass
+// in an intrusive_ptr instead it just converts the argument passed to
+// requested intrusive_ptr type.
+template <typename T, typename... Args>
+Tensor make_tensor(Args&&... args) {
+  return Tensor(c10::make_intrusive<T>(std::forward<Args>(args)...));
+}
+
+} // namespace detail
+
+} // namespace at
+
+
+namespace at {
+${tensor_method_definitions}
+} // namespace at
+
+
+namespace c10 {
+template <>
+struct MaybeOwnedTraits<at::Tensor> {
+  using owned_type = at::Tensor;
+  using borrow_type = at::Tensor;
+
+  static borrow_type createBorrow(const owned_type& from) {
+    // NOTE: this can be implemented without the special
+    // unsafe_borrow_t Tensor constructor as
+    //
+    // return borrow_type(c10::intrusive_ptr<at::TensorImpl, at::UndefinedTensorImpl>::reclaim(from.unsafeGetTensorImpl()));
+    //
+    // but that hurts inlining due to the nullptr check in the
+    // Tensor(c10::intrusive_ptr<...>) constructor. We already know
+    // that from.impl_ isn't null because from is a valid Tensor, so
+    // we needn't do the check again. (using __builtin_assume can
+    // avoid this, but wouldn't be portable to MSVC.)
+    return borrow_type(borrow_type::unsafe_borrow_t{}, from);
+  }
+
+  static void assignBorrow(borrow_type& lhs, const borrow_type& rhs) {
+    lhs.unsafeReleaseTensorImpl();
+    // See above note: this can be implemented with public API
+    // similarly to createBorrow(), but that would hurt inlining.
+    lhs = borrow_type(borrow_type::unsafe_borrow_t{}, rhs);
+  }
+
+  static void destroyBorrow(borrow_type& toDestroy) {
+    toDestroy.unsafeReleaseTensorImpl(); // "leak" it, but it was already +0.
+  }
+
+  static const owned_type& referenceFromBorrow(const borrow_type& borrow) {
+    return borrow;
+  }
+
+  static const owned_type* pointerFromBorrow(const borrow_type& borrow) {
+    return &borrow;
+  }
+
+  static bool debugBorrowIsValid(const borrow_type& /*borrow*/) {
+    return true;
+  }
+};
+
+template <>
+struct ExclusivelyOwnedTraits<at::Tensor> {
+  using repr_type = at::Tensor;
+  using pointer_type = at::Tensor*;
+  using const_pointer_type = const at::Tensor*;
+
+  static repr_type nullRepr() {
+    return at::Tensor();
+  }
+
+  template <class... Args>
+  static repr_type createInPlace(Args&&... args) {
+    return at::Tensor(std::forward<Args>(args)...);
+  }
+
+  static repr_type moveToRepr(at::Tensor&& x) {
+    return std::move(x);
+  }
+
+  static void destroyOwned(at::Tensor& x) {
+    return ExclusivelyOwnedTraits<at::TensorBase>::destroyOwned(x);
+  }
+
+  static at::Tensor take(at::Tensor& x) {
+    return std::move(x);
+  }
+
+  static pointer_type getImpl(repr_type& x) {
+    return &x;
+  }
+
+  static const_pointer_type getImpl(const repr_type& x) {
+    return &x;
+  }
+};
+} // namespace c10
+
+namespace at {
+
+inline c10::MaybeOwned<Tensor> borrow_from_optional_tensor(
+    const std::optional<Tensor>& opt) {
+  return opt.has_value()
+    ? c10::MaybeOwned<Tensor>::borrowed(*opt)
+    : c10::MaybeOwned<Tensor>::owned(std::in_place);
+}
+
+inline c10::MaybeOwned<Tensor> Tensor::expect_contiguous(MemoryFormat memory_format) const & {
+  if (is_contiguous(memory_format)) {
+    return c10::MaybeOwned<Tensor>::borrowed(*this);
+  } else {
+    return c10::MaybeOwned<Tensor>::owned(__dispatch_contiguous(memory_format));
+  }
+}
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/TensorMethods.cpp

@@ -0,0 +1,61 @@
+#include <c10/core/Scalar.h>
+#include <ATen/core/TensorBody.h>
+
+#include <string_view>
+
+namespace at {
+
+namespace {
+
+// Verifies the requested type is the same as the Tensor's type.
+void check_type(const TensorBase& tensor, ScalarType type) {
+  TORCH_CHECK(
+      tensor.scalar_type() == type
+      || (isQIntType(tensor.scalar_type())
+          && toUnderlying(tensor.scalar_type()) == type),
+      "expected scalar type ", type, " but found ", tensor.scalar_type());
+}
+
+} // namespace
+
+template <typename T>
+const T* TensorBase::const_data_ptr() const {
+  using NonConstT = std::remove_const_t<T>;
+  check_type(*this, c10::CppTypeToScalarType<NonConstT>());
+  return this->unsafeGetTensorImpl()->data_ptr_impl<NonConstT>();
+}
+
+template <typename T>
+T* TensorBase::mutable_data_ptr() const {
+  check_type(*this, c10::CppTypeToScalarType<T>());
+  return this->unsafeGetTensorImpl()->mutable_data_ptr_impl<T>();
+}
+
+template <typename T>
+T* TensorBase::data_ptr() const {
+  return this->mutable_data_ptr<T>();
+}
+
+#define DEFINE_CAST(T, name)                                                \
+   template TORCH_API const T* TensorBase::const_data_ptr<T>() const;       \
+   template TORCH_API const T* TensorBase::const_data_ptr<const T>() const; \
+   template TORCH_API T* TensorBase::mutable_data_ptr() const;              \
+   template TORCH_API T* TensorBase::data_ptr() const;
+
+ AT_FORALL_SCALAR_TYPES_WITH_COMPLEX(DEFINE_CAST)
+ AT_FORALL_QINT_TYPES(DEFINE_CAST)
+ DEFINE_CAST(uint16_t, UInt16)
+ DEFINE_CAST(uint32_t, UInt32)
+ DEFINE_CAST(uint64_t, UInt64)
+ #undef DEFINE_CAST
+
+ #define DEFINE_ITEM(T, name)      \
+   template <>                     \
+   TORCH_API T Tensor::item() const { \
+     return item().to##name();     \
+   }
+
+ AT_FORALL_SCALAR_TYPES_WITH_COMPLEX(DEFINE_ITEM)
+ #undef DEFINE_ITEM
+
+ } //namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/UfuncCPU.cpp

@@ -0,0 +1,19 @@
+#define TORCH_ASSERT_NO_OPERATORS
+
+#include <ATen/native/DispatchStub.h>
+#include <ATen/TensorIterator.h>
+#include <ATen/TensorMeta.h>
+
+namespace at {
+
+// NB: this is explicitly copied here (via codegen) rather than
+// included via NativeFunctions.h to avoid recompiling this file when
+// NativeFunctions.h changes
+namespace meta {
+${meta_declaration}
+}
+
+namespace native {
+${native_declaration}
+${native_definitions}
+}} // namespace at::native

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/UfuncCPUKernel.cpp

@@ -0,0 +1,14 @@
+#define TORCH_ASSERT_NO_OPERATORS
+
+#include <ATen/native/ufunc/${name}.h>
+#include <ATen/native/DispatchStub.h>
+#include <ATen/TensorIterator.h>
+#include <ATen/native/cpu/Loops.h>
+#include <ATen/cpu/vec/vec.h>
+#include <ATen/Dispatch.h>
+#include <c10/core/Scalar.h>
+
+namespace at {
+namespace native {
+${native_definitions}
+}} // namespace at::native

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/UfuncCUDA.cu

@@ -0,0 +1,21 @@
+#define TORCH_ASSERT_NO_OPERATORS
+
+#include <ATen/native/ufunc/${name}.h>
+#include <ATen/Dispatch.h>
+#include <ATen/native/DispatchStub.h>
+#include <c10/core/Scalar.h>
+${cuda_headers}
+
+namespace at {
+
+// NB: this is explicitly copied here (via codegen) rather than
+// included via NativeFunctions.h to avoid recompiling this file when
+// NativeFunctions.h changes
+namespace meta {
+${meta_declaration}
+}
+
+namespace native {
+${native_declaration}
+${native_definitions}
+}} // namespace at::native

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/UnboxingFunctions.cpp

@@ -0,0 +1,35 @@
+#include <ATen/UnboxingFunctions.h>
+#include <ATen/Functions.h>
+
+#include <ATen/Tensor.h>
+#include <ATen/core/functional.h>
+#include <ATen/core/interned_strings.h>
+#include <ATen/core/ivalue.h>
+#include <ATen/core/stack.h>
+
+#include <algorithm>
+#include <array>
+#include <cstddef>
+#include <cstring>
+#include <sstream>
+#include <stdexcept>
+#include <tuple>
+#include <unordered_map>
+#include <unordered_set>
+#include <utility>
+#include <vector>
+namespace at {
+namespace unboxing {
+
+using ::c10::fmap;
+using ::c10::filter;
+using torch::jit::peek;
+using torch::jit::drop;
+using torch::jit::pack;
+using torch::jit::pop;
+
+// Generated function declaration
+${definitions}
+
+} // namespace unboxing
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/UnboxingFunctions.h

@@ -0,0 +1,32 @@
+// ${generated_comment}
+
+// Generated by tools/jit/gen_unboxing.py. This file declares code generated boxed C++ functions for operators,
+// base off of native_functions.yaml (or similar yaml file with the same syntax). The definition of such a boxed
+// function will pop out IValues from the stack then convert them into the correct C++ types based on given schema. This
+// unboxing logic is an alternative to template-based metaprogramming unboxing.
+
+#pragma once
+
+#include <ATen/ATen.h>
+namespace at {
+namespace unboxing {
+namespace {
+
+template<typename T, size_t N>
+std::array<T, N> as_array(const c10::List<c10::IValue>& list) {
+    std::array<T, N> res;
+    AT_ASSERT(list.size() == N);
+    std::vector<T> vec;
+    for (c10::IValue elem : list) {
+        vec.push_back(elem.to<T>());
+    }
+    std::copy(vec.begin(), vec.end(), res.begin());
+    return res;
+}
+}  // namespace <anonymous>
+using Stack = std::vector<c10::IValue>;
+// Generated function declaration
+${declarations}
+
+} // namespace unboxing
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/ViewMetaClasses.cpp

@@ -0,0 +1,19 @@
+// ${generated_comment}
+
+#include <ATen/FunctionalInverses.h>
+#include <ATen/ViewMetaClasses.h>
+
+#ifndef AT_PER_OPERATOR_HEADERS
+#include <ATen/Operators.h>
+#include <ATen/NativeFunctions.h>
+#else
+${op_headers}
+#endif
+
+namespace at {
+namespace functionalization {
+
+${view_meta_implementations}
+
+} // namespace functionalization
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/ViewMetaClasses.h

@@ -0,0 +1,12 @@
+#define TORCH_ASSERT_ONLY_METHOD_OPERATORS
+// ${generated_comment}
+
+#include <ATen/FunctionalStorageImpl.h>
+
+namespace at {
+namespace functionalization {
+
+${view_meta_declarations}
+
+} // namespace functionalization
+} // namespace at

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/ViewMetaClassesPythonBinding.cpp

@@ -0,0 +1,11 @@
+#include <ATen/ViewMetaClasses.h>
+#include <torch/csrc/functionalization/Module.h>
+
+namespace torch::functionalization {
+
+void initGenerated(PyObject* module) {
+  auto functionalization = py::handle(module).cast<py::module>();
+  $view_meta_bindings
+}
+
+} // namespace torch::functionalization

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/aten_interned_strings.h

@@ -0,0 +1,22 @@
+#pragma once
+
+// ${generated_comment}
+
+#if defined(TORCH_ASSERT_NO_OPERATORS) || defined(TORCH_ASSERT_ONLY_METHOD_OPERATORS)
+#error This change adds a dependency on native_functions.yaml,          \
+  meaning the file will need to be re-compiled every time an operator   \
+  is changed or added. Consider if including <ATen/core/symbol.h> for   \
+  the c10::Symbol class would be sufficient, or if your change would be \
+  better placed in another file.
+#endif
+
+// ATen symbols correspond exactly to operators defined in ATen. Every
+// symbol here corresponds exactly to an ATen operation defined in
+// native_functions.yaml; attributes are in one-to-one correspondence
+// with their ATen name.
+
+#define FORALL_ATEN_BASE_SYMBOLS(_) \
+${aten_symbols}
+
+#define FORALL_ATTR_BASE_SYMBOLS(_) \
+${attr_symbols}

kronos-venv/lib/python3.12/site-packages/torchgen/packaged/ATen/templates/enum_tag.h

@@ -0,0 +1,19 @@
+#pragma once
+
+// ${generated_comment}
+
+#include <torch/headeronly/macros/Macros.h>
+
+HIDDEN_NAMESPACE_BEGIN(torch, headeronly)
+
+// Enum of valid tags obtained from the entries in tags.yaml
+enum class Tag {
+    ${enum_of_valid_tags}
+};
+
+HIDDEN_NAMESPACE_END(torch, headeronly)
+
+// Re-expose in the at:: namespace for backward compatibility
+namespace at {
+    using torch::headeronly::Tag;
+}