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minigpt2/lib/python3.10/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

minigpt2/lib/python3.10/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}

minigpt2/lib/python3.10/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}

minigpt2/lib/python3.10/site-packages/torchgen/packaged/ATen/templates/Function.h

@@ -0,0 +1,26 @@
+#pragma once
+
+// ${generated_comment}
+
+#include <ATen/Context.h>
+#include <ATen/DeviceGuard.h>
+#include <ATen/TensorUtils.h>
+#include <ATen/TracerMode.h>
+#include <ATen/core/Generator.h>
+#include <ATen/core/Reduction.h>
+#include <ATen/core/Tensor.h>
+#include <c10/core/Scalar.h>
+#include <c10/core/Storage.h>
+#include <c10/core/TensorOptions.h>
+#include <c10/util/Deprecated.h>
+#include <optional>
+
+${static_dispatch_ops_headers}
+
+${operator_includes}
+
+namespace at {
+
+${function_definitions}
+
+}

minigpt2/lib/python3.10/site-packages/torchgen/packaged/ATen/templates/Functions.cpp

@@ -0,0 +1,103 @@
+#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_);
+  }
+
+   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();
+     }
+     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();
+   }
+   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

minigpt2/lib/python3.10/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}

minigpt2/lib/python3.10/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}

minigpt2/lib/python3.10/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

minigpt2/lib/python3.10/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}

minigpt2/lib/python3.10/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

minigpt2/lib/python3.10/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

minigpt2/lib/python3.10/site-packages/torchgen/packaged/ATen/templates/RegisterFunctionalization.cpp

@@ -0,0 +1,110 @@
+#define TORCH_ASSERT_ONLY_METHOD_OPERATORS
+// ${generated_comment}
+
+#include <ATen/core/LegacyTypeDispatch.h>
+#include <ATen/EmptyTensor.h>
+#include <ATen/FunctionalTensorWrapper.h>
+#include <ATen/FunctionalInverses.h>
+#include <ATen/MemoryOverlap.h>
+#include <torch/library.h>
+
+#ifndef AT_PER_OPERATOR_HEADERS
+#include <ATen/Operators.h>
+#include <ATen/NativeFunctions.h>
+#else
+// needed for the meta tensor calls to get stride info in functionalization
+#include <ATen/ops/empty_strided_native.h>
+// needed for special handling of copy_().
+// See Note [functionalizating copy_() and not preserving strides]
+#include <ATen/ops/to_ops.h>
+#include <ATen/ops/expand_copy_ops.h>
+
+$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=*/std::make_optional(t.scalar_type()), /*layout=*/std::make_optional(t.layout()),
+/*device=*/std::make_optional(c10::Device(kMeta)), /*pin_memory=*/std::nullopt);
+}
+
+inline std::optional<Tensor> to_meta(const std::optional<Tensor>& t) {
+  if (t.has_value()) {
+    return std::make_optional<Tensor>(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;
+}
+
+
+${func_definitions}
+
+}  // namespace functionalization
+
+namespace {
+
+TORCH_LIBRARY_IMPL(aten, Functionalize, m) {
+  ${func_registrations};
+}
+
+}  // namespace
+
+} // namespace at

minigpt2/lib/python3.10/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

minigpt2/lib/python3.10/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}

minigpt2/lib/python3.10/site-packages/torchgen/packaged/ATen/templates/TensorMethods.cpp

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

minigpt2/lib/python3.10/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

minigpt2/lib/python3.10/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

minigpt2/lib/python3.10/site-packages/torchgen/packaged/autograd/BUILD.bazel

@@ -0,0 +1,4 @@
+load("//:tools/bazel.bzl", "rules")
+load(":build.bzl", "define_targets")
+
+define_targets(rules = rules)

minigpt2/lib/python3.10/site-packages/torchgen/packaged/autograd/build.bzl

@@ -0,0 +1,14 @@
+def define_targets(rules):
+    rules.py_library(
+        name = "autograd",
+        srcs = rules.glob(["*.py"]),
+        data = rules.glob([
+            "*.yaml",
+            "templates/*",
+        ]),
+        visibility = ["//:__subpackages__"],
+        deps = [
+            rules.requirement("PyYAML"),
+            "//torchgen",
+        ],
+    )

minigpt2/lib/python3.10/site-packages/torchgen/packaged/autograd/gen_annotated_fn_args.py

@@ -0,0 +1,132 @@
+"""
+For procedural tests needed for __torch_function__, we use this function
+to export method names and signatures as needed by the tests in
+test/test_overrides.py.
+
+python -m tools.autograd.gen_annotated_fn_args \
+       aten/src/ATen/native/native_functions.yaml \
+       aten/src/ATen/native/tags.yaml \
+       $OUTPUT_DIR \
+       tools/autograd
+
+Where $OUTPUT_DIR is where you would like the files to be
+generated.  In the full build system, OUTPUT_DIR is
+torch/testing/_internal/generated
+"""
+
+from __future__ import annotations
+
+import argparse
+import os
+import textwrap
+from collections import defaultdict
+from typing import Any, Sequence, TYPE_CHECKING
+
+import torchgen.api.python as python
+from torchgen.context import with_native_function
+from torchgen.gen import parse_native_yaml
+from torchgen.utils import FileManager
+
+from .gen_python_functions import (
+    is_py_fft_function,
+    is_py_linalg_function,
+    is_py_nn_function,
+    is_py_special_function,
+    is_py_torch_function,
+    is_py_variable_method,
+    should_generate_py_binding,
+)
+
+
+if TYPE_CHECKING:
+    from torchgen.model import Argument, BaseOperatorName, NativeFunction
+
+
+def gen_annotated(
+    native_yaml_path: str, tags_yaml_path: str, out: str, autograd_dir: str
+) -> None:
+    native_functions = parse_native_yaml(
+        native_yaml_path, tags_yaml_path
+    ).native_functions
+    mappings = (
+        (is_py_torch_function, "torch._C._VariableFunctions"),
+        (is_py_nn_function, "torch._C._nn"),
+        (is_py_linalg_function, "torch._C._linalg"),
+        (is_py_special_function, "torch._C._special"),
+        (is_py_fft_function, "torch._C._fft"),
+        (is_py_variable_method, "torch.Tensor"),
+    )
+    annotated_args: list[str] = []
+    for pred, namespace in mappings:
+        groups: dict[BaseOperatorName, list[NativeFunction]] = defaultdict(list)
+        for f in native_functions:
+            if not should_generate_py_binding(f) or not pred(f):
+                continue
+            groups[f.func.name.name].append(f)
+        for group in groups.values():
+            for f in group:
+                annotated_args.append(f"{namespace}.{gen_annotated_args(f)}")
+
+    template_path = os.path.join(autograd_dir, "templates")
+    fm = FileManager(install_dir=out, template_dir=template_path, dry_run=False)
+    fm.write_with_template(
+        "annotated_fn_args.py",
+        "annotated_fn_args.py.in",
+        lambda: {
+            "annotated_args": textwrap.indent("\n".join(annotated_args), "    "),
+        },
+    )
+
+
+@with_native_function
+def gen_annotated_args(f: NativeFunction) -> str:
+    def _get_kwargs_func_exclusion_list() -> list[str]:
+        # functions that currently don't work with kwargs in test_overrides.py
+        return [
+            "diagonal",
+            "round_",
+            "round",
+            "scatter_",
+        ]
+
+    def _add_out_arg(
+        out_args: list[dict[str, Any]], args: Sequence[Argument], *, is_kwarg_only: bool
+    ) -> None:
+        for arg in args:
+            if arg.default is not None:
+                continue
+            out_arg: dict[str, Any] = {}
+            out_arg["is_kwarg_only"] = str(is_kwarg_only)
+            out_arg["name"] = arg.name
+            out_arg["simple_type"] = python.argument_type_str(
+                arg.type, simple_type=True
+            )
+            size_t = python.argument_type_size(arg.type)
+            if size_t:
+                out_arg["size"] = size_t
+            out_args.append(out_arg)
+
+    out_args: list[dict[str, Any]] = []
+    _add_out_arg(out_args, f.func.arguments.flat_positional, is_kwarg_only=False)
+    if f"{f.func.name.name}" not in _get_kwargs_func_exclusion_list():
+        _add_out_arg(out_args, f.func.arguments.flat_kwarg_only, is_kwarg_only=True)
+
+    return f"{f.func.name.name}: {repr(out_args)},"
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="Generate annotated_fn_args script")
+    parser.add_argument(
+        "native_functions", metavar="NATIVE", help="path to native_functions.yaml"
+    )
+    parser.add_argument("tags", metavar="TAGS", help="path to tags.yaml")
+    parser.add_argument("out", metavar="OUT", help="path to output directory")
+    parser.add_argument(
+        "autograd", metavar="AUTOGRAD", help="path to template directory"
+    )
+    args = parser.parse_args()
+    gen_annotated(args.native_functions, args.tags, args.out, args.autograd)
+
+
+if __name__ == "__main__":
+    main()

minigpt2/lib/python3.10/site-packages/torchgen/packaged/autograd/gen_python_functions.py

@@ -0,0 +1,1402 @@
+# Generates Python bindings for ATen functions
+#
+# The bindings are generated as methods on python_variable or functions on the
+# torch._C._nn. torch._C._fft, torch._C._linalg, torch._C._nested, torch._C._sparse
+# or torch._C._special objects.
+#
+
+# Code tries to stick to the following rules:
+#
+# - templates should be colocated with the functions that use them.
+#   no templates are currently shared between functions, but if that
+#   happens, maybe put the template with the first one
+#
+# - don't use environment dictionaries when calling template.substitute().
+#   pass named arguments directly for everything, otherwise it's much too
+#   hard to track what's actually being used and by who
+#
+# - colocate any new hacks/adjustments with existing ones of the same kind.
+#   ideally in a data structure rather than code if possible. See e.g.
+#   SCHEMA_DEFAULT_CONVERSION_HACKS, etc.
+#
+# - similarly, conversions from one format to another should ideally happen
+#   all at once in a single place.
+#
+# - no nontrivial nested functions. couple-liners are ok but please no more.
+#   especially avoid functions that read/write outer variables defined far away.
+#
+# - raise RuntimeError instead of asserting, and put as much
+#   information as is available into the message. I.e. no need to
+#   plumb in new params whose only purpose is to fill out an error
+#   message, but use what's there
+#
+
+from __future__ import annotations
+
+import itertools
+import re
+from collections import defaultdict
+from typing import Callable, Iterable, Sequence
+
+import yaml
+
+from torchgen.api import cpp
+from torchgen.api.python import (
+    arg_parser_output_exprs,
+    cpp_dispatch_exprs,
+    cpp_dispatch_target,
+    dispatch_lambda_args,
+    dispatch_lambda_exprs,
+    dispatch_lambda_return_str,
+    has_tensor_options,
+    PythonSignature,
+    PythonSignatureDeprecated,
+    PythonSignatureGroup,
+    PythonSignatureNativeFunctionPair,
+    signature,
+    signature_from_schema,
+    structseq_fieldnames,
+)
+from torchgen.code_template import CodeTemplate
+from torchgen.context import with_native_function
+from torchgen.gen import cpp_string, parse_native_yaml, parse_tags_yaml
+from torchgen.model import (
+    Argument,
+    BaseOperatorName,
+    FunctionSchema,
+    NativeFunction,
+    SchemaKind,
+    Type,
+    Variant,
+)
+from torchgen.utils import FileManager, split_name_params
+from torchgen.yaml_utils import YamlLoader
+
+from .gen_inplace_or_view_type import is_tensor_list_type
+from .gen_trace_type import should_trace
+
+
+#
+# declarations blocklist
+# We skip codegen for these functions, for various reasons.
+# Future PRs will categorize this list and eliminate or hoist
+# them out of eager-only codegen.
+# See https://github.com/pytorch/pytorch/issues/30788
+#
+
+# These functions require manual Python bindings or are not exposed to Python
+_SKIP_PYTHON_BINDINGS = [
+    "alias",
+    "contiguous",
+    "is_cuda",
+    "is_sparse",
+    "is_sparse_csr",
+    "size",
+    "stride",
+    "sym_size",
+    "sym_stride",
+    "sym_storage_offset",
+    "sym_numel",
+    ".*_backward",
+    ".*_backward_(out|input|weight|bias)",
+    ".*_forward",
+    ".*_forward_out",
+    ".*_jvp",
+    "_unsafe_view",
+    "tensor",
+    "_?sparse_(coo|compressed|csr|csc|bsr|bsc)_tensor.*",
+    "_range.*",
+    "_sparse_add_out",
+    "_sparse_div.*",
+    "_sparse_mul.*",
+    "_sparse_sub.*",
+    "_sparse_dense_add_out",
+    "index",
+    "index_out",
+    "unique_dim_consecutive",
+    "_cumsum.*",
+    "_cumprod.*",
+    "_sum.*",
+    "_prod.*",
+    "_th_.*",
+    "_thnn_.*",
+    "range.*",
+    "_solve.*",
+    "_inverse.*",
+    "_cholesky.*",
+    "_triangular_solve.*",
+    "_qr.*",
+    "_svd.*",
+    "slice",
+    "item",
+    "_local_scalar_dense",
+    "to",
+    "_to_copy",
+    "_to_copy_out",
+    "_reshape_copy",
+    "_reshape_copy_out",
+    "copy_sparse_to_sparse_",
+    "copy_",
+    "_foreach_copy",
+    "numpy_T",
+    "matrix_H",
+    "mT",
+    "mH",  # these need to be an attributes in Python, not functions
+    "nonzero(_(out|numpy))?",
+    "set_data",
+    ".*_overrideable",  # overrideable functions for backend extension
+    "data",
+    "is_leaf",
+    "output_nr",
+    "_version",
+    "requires_grad_",
+    "retains_grad",
+    "set_",
+    "_fw_primal",
+    "fake_quantize_per_tensor_affine_cachemask",
+    "fake_quantize_per_channel_affine_cachemask",
+    "_new_zeros_with_same_feature_meta",
+    "_has_same_storage_numel",  # used for forward AD internals
+    "_reshape_alias",
+    "replace_",  # only used by the functionalization pass, doesn't need to be exposed to python
+    "copy",  # only used by the functionalization pass
+    "fill.Tensor",  # only used by the functionalization pass
+    "fill.Scalar",  # only used by the functionalization pass
+    "lift.*",
+    "normal_functional",  # only used by the functionalization pass
+    "nbytes",
+    "itemsize",
+    "_batch_norm_with_update",
+    "_batch_norm_with_update_out",
+    "_batch_norm_no_update",
+]
+
+SKIP_PYTHON_BINDINGS = [
+    re.compile(rf"^{pattern}$") for pattern in _SKIP_PYTHON_BINDINGS
+]
+
+# These function signatures are not exposed to Python. Note that this signature
+# list does not support regex.
+SKIP_PYTHON_BINDINGS_SIGNATURES = [
+    "add.Scalar(Tensor self, Scalar other, Scalar alpha=1) -> Tensor",
+    "add_.Scalar(Tensor(a!) self, Scalar other, Scalar alpha=1) -> Tensor(a!)",
+    "sub.Scalar(Tensor self, Scalar other, Scalar alpha=1) -> Tensor",
+    "sub_.Scalar(Tensor(a!) self, Scalar other, Scalar alpha=1) -> Tensor(a!)",
+    "mul.Scalar(Tensor self, Scalar other) -> Tensor",
+    "mul_.Scalar(Tensor(a!) self, Scalar other) -> Tensor(a!)",
+    "div.Scalar(Tensor self, Scalar other) -> Tensor",
+    "div_.Scalar(Tensor(a!) self, Scalar other) -> Tensor(a!)",
+]
+
+
+@with_native_function
+def should_generate_py_binding(f: NativeFunction) -> bool:
+    # NativeFunctions that are entirely code-generated should not get python bindings
+    # because these codegen implementations are often inefficient. A handful of
+    # view_copy style ops were exposed accidentally when they were handwritten and now
+    # that we are moving them to codegen for bc reasons we need to keep them exposed in
+    # python.
+    if "generated" in f.tags and "view_copy" not in f.tags:
+        return False
+
+    name = cpp.name(f.func)
+    for skip_regex in SKIP_PYTHON_BINDINGS:
+        if skip_regex.match(name):
+            return False
+
+    signature = str(f.func)
+    for pattern in SKIP_PYTHON_BINDINGS_SIGNATURES:
+        if pattern == signature:
+            return False
+    return True
+
+
+def get_pycname(name: BaseOperatorName) -> str:
+    return f"THPVariable_{name}"
+
+
+def is_noarg(overloads: Sequence[PythonSignatureNativeFunctionPair]) -> bool:
+    return len(overloads) == 1 and overloads[0].signature.arguments_count() == 0
+
+
+def is_py_variable_method(f: NativeFunction) -> bool:
+    return f.python_module is None and Variant.method in f.variants
+
+
+def is_py_torch_function(f: NativeFunction) -> bool:
+    return f.python_module is None and Variant.function in f.variants
+
+
+def is_py_nn_function(f: NativeFunction) -> bool:
+    return f.python_module == "nn"
+
+
+def is_py_fft_function(f: NativeFunction) -> bool:
+    return f.python_module == "fft"
+
+
+def is_py_linalg_function(f: NativeFunction) -> bool:
+    return f.python_module == "linalg"
+
+
+def is_py_nested_function(f: NativeFunction) -> bool:
+    return f.python_module == "nested"
+
+
+def is_py_sparse_function(f: NativeFunction) -> bool:
+    return f.python_module == "sparse"
+
+
+def is_py_special_function(f: NativeFunction) -> bool:
+    return f.python_module == "special"
+
+
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+#
+#                            Main Function
+#
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+
+
+def gen(
+    out: str,
+    native_yaml_path: str,
+    tags_yaml_path: str,
+    deprecated_yaml_path: str,
+    template_path: str,
+    *,
+    symint: bool = True,
+) -> None:
+    fm = FileManager(install_dir=out, template_dir=template_path, dry_run=False)
+    native_functions = parse_native_yaml(
+        native_yaml_path, tags_yaml_path
+    ).native_functions
+    native_functions = list(filter(should_generate_py_binding, native_functions))
+
+    methods = load_signatures(native_functions, deprecated_yaml_path, method=True)
+    create_python_bindings(
+        fm,
+        methods,
+        is_py_variable_method,
+        None,
+        "python_variable_methods.cpp",
+        method=True,
+        symint=symint,
+    )
+
+    # NOTE: num_shards here must be synced with gatherTorchFunctions in
+    #       torch/csrc/autograd/python_torch_functions_manual.cpp
+    functions = load_signatures(native_functions, deprecated_yaml_path, method=False)
+    create_python_bindings_sharded(
+        fm,
+        functions,
+        is_py_torch_function,
+        "torch",
+        "python_torch_functions.cpp",
+        method=False,
+        num_shards=3,
+        symint=symint,
+    )
+
+    create_python_bindings(
+        fm,
+        functions,
+        is_py_nn_function,
+        "torch.nn",
+        "python_nn_functions.cpp",
+        method=False,
+        symint=symint,
+    )
+
+    create_python_bindings(
+        fm,
+        functions,
+        is_py_fft_function,
+        "torch.fft",
+        "python_fft_functions.cpp",
+        method=False,
+        symint=symint,
+    )
+
+    create_python_bindings(
+        fm,
+        functions,
+        is_py_linalg_function,
+        "torch.linalg",
+        "python_linalg_functions.cpp",
+        method=False,
+        symint=symint,
+    )
+
+    create_python_bindings(
+        fm,
+        functions,
+        is_py_nested_function,
+        "torch.nested",
+        "python_nested_functions.cpp",
+        method=False,
+    )
+
+    create_python_bindings(
+        fm,
+        functions,
+        is_py_sparse_function,
+        "torch.sparse",
+        "python_sparse_functions.cpp",
+        method=False,
+        symint=symint,
+    )
+
+    create_python_bindings(
+        fm,
+        functions,
+        is_py_special_function,
+        "torch.special",
+        "python_special_functions.cpp",
+        method=False,
+        symint=symint,
+    )
+
+    # Currently, we only use `functions` to generate `return_types` bindings.
+    # All methods which return structseq have function variant at this point.
+    # If any method only operator with structseq is added in the future,
+    # we will have to address that.
+    create_python_return_type_bindings(
+        fm, functions, lambda fn: True, "python_return_types.cpp"
+    )
+    create_python_return_type_bindings_header(
+        fm, functions, lambda fn: True, "python_return_types.h"
+    )
+
+    valid_tags = parse_tags_yaml(tags_yaml_path)
+
+    def gen_tags_enum() -> dict[str, str]:
+        return {
+            "enum_of_valid_tags": (
+                "".join(
+                    [f'\n.value("{tag}", at::Tag::{tag})' for tag in sorted(valid_tags)]
+                )
+            )
+        }
+
+    fm.write("python_enum_tag.cpp", gen_tags_enum)
+
+
+def group_filter_overloads(
+    pairs: Sequence[PythonSignatureNativeFunctionPair],
+    pred: Callable[[NativeFunction], bool],
+) -> dict[BaseOperatorName, list[PythonSignatureNativeFunctionPair]]:
+    grouped: dict[
+        BaseOperatorName, list[PythonSignatureNativeFunctionPair]
+    ] = defaultdict(list)
+    for pair in pairs:
+        if pred(pair.function):
+            grouped[pair.function.func.name.name].append(pair)
+    return grouped
+
+
+def create_python_bindings(
+    fm: FileManager,
+    pairs: Sequence[PythonSignatureNativeFunctionPair],
+    pred: Callable[[NativeFunction], bool],
+    module: str | None,
+    filename: str,
+    *,
+    method: bool,
+    symint: bool = True,
+) -> None:
+    """Generates Python bindings to ATen functions"""
+    py_methods: list[str] = []
+    ops_headers: list[str] = []
+    py_method_defs: list[str] = []
+    py_forwards: list[str] = []
+
+    grouped = group_filter_overloads(pairs, pred)
+
+    for name in sorted(grouped.keys(), key=str):
+        overloads = grouped[name]
+        py_methods.append(
+            method_impl(name, module, overloads, method=method, symint=symint)
+        )
+        py_method_defs.append(method_def(name, module, overloads, method=method))
+        py_forwards.extend(forward_decls(name, overloads, method=method))
+        ops_headers.append(f"#include <ATen/ops/{name.base}.h>")
+
+    fm.write_with_template(
+        filename,
+        filename,
+        lambda: {
+            "generated_comment": "@"
+            + f"generated from {fm.template_dir_for_comments()}/{filename}",
+            "ops_headers": ops_headers,
+            "py_forwards": py_forwards,
+            "py_methods": py_methods,
+            "py_method_defs": py_method_defs,
+        },
+    )
+
+
+def create_python_return_type_bindings(
+    fm: FileManager,
+    pairs: Sequence[PythonSignatureNativeFunctionPair],
+    pred: Callable[[NativeFunction], bool],
+    filename: str,
+) -> None:
+    """
+    Generate function to initialize and return named tuple for native functions
+    which returns named tuple and registration invocations in `python_return_types.cpp`.
+    """
+    py_return_types_definition: list[str] = []
+    py_return_types_registrations: list[str] = []
+
+    grouped = group_filter_overloads(pairs, pred)
+
+    for name in sorted(grouped.keys(), key=str):
+        overloads = grouped[name]
+        definitions, registrations = generate_return_type_definition_and_registrations(
+            overloads
+        )
+        py_return_types_definition.append(
+            "" if not definitions else "\n".join(definitions)
+        )
+        py_return_types_registrations.append(
+            "" if not registrations else "\n".join(registrations)
+        )
+
+    fm.write_with_template(
+        filename,
+        filename,
+        lambda: {
+            "generated_comment": "@"
+            + f"generated from {fm.template_dir_for_comments()}/{filename}",
+            "py_return_types": py_return_types_definition,
+            "py_return_types_registrations": py_return_types_registrations,
+        },
+    )
+
+
+def create_python_return_type_bindings_header(
+    fm: FileManager,
+    pairs: Sequence[PythonSignatureNativeFunctionPair],
+    pred: Callable[[NativeFunction], bool],
+    filename: str,
+) -> None:
+    """
+    Generate function to initialize and return named tuple for native functions
+    which returns named tuple and relevant entry for the map in `python_return_types.cpp`.
+    """
+    py_return_types_declarations: list[str] = []
+
+    grouped = group_filter_overloads(pairs, pred)
+
+    for name in sorted(grouped.keys(), key=str):
+        overloads = grouped[name]
+        declarations = generate_return_type_declarations(overloads)
+        py_return_types_declarations.append(
+            "" if not declarations else "\n".join(declarations)
+        )
+
+    fm.write_with_template(
+        filename,
+        filename,
+        lambda: {
+            "generated_comment": "@"
+            + f"generated from {fm.template_dir_for_comments()}/{filename}",
+            "py_return_types_declarations": py_return_types_declarations,
+        },
+    )
+
+
+def create_python_bindings_sharded(
+    fm: FileManager,
+    pairs: Sequence[PythonSignatureNativeFunctionPair],
+    pred: Callable[[NativeFunction], bool],
+    module: str | None,
+    filename: str,
+    *,
+    method: bool,
+    num_shards: int,
+    symint: bool = True,
+) -> None:
+    """Generates Python bindings to ATen functions"""
+    grouped = group_filter_overloads(pairs, pred)
+
+    def key_func(
+        kv: tuple[BaseOperatorName, list[PythonSignatureNativeFunctionPair]]
+    ) -> str:
+        return kv[0].base
+
+    def env_func(
+        kv: tuple[BaseOperatorName, list[PythonSignatureNativeFunctionPair]]
+    ) -> dict[str, list[str]]:
+        name, fn_pairs = kv
+        return {
+            "ops_headers": [f"#include <ATen/ops/{name.base}.h>"],
+            "py_forwards": list(forward_decls(name, fn_pairs, method=method)),
+            "py_methods": [
+                method_impl(name, module, fn_pairs, method=method, symint=symint)
+            ],
+            "py_method_defs": [method_def(name, module, fn_pairs, method=method)],
+        }
+
+    fm.write_sharded(
+        filename,
+        grouped.items(),
+        base_env={
+            "generated_comment": "@"
+            + f"generated from {fm.template_dir_for_comments()}/{filename}",
+        },
+        key_fn=key_func,
+        env_callable=env_func,
+        num_shards=num_shards,
+        sharded_keys={"ops_headers", "py_forwards", "py_methods", "py_method_defs"},
+    )
+
+
+def load_signatures(
+    native_functions: list[NativeFunction],
+    deprecated_yaml_path: str,
+    *,
+    method: bool,
+    skip_deprecated: bool = False,
+    pyi: bool = False,
+) -> Sequence[PythonSignatureNativeFunctionPair]:
+    @with_native_function
+    def gen_signature_pairs(f: NativeFunction) -> PythonSignatureNativeFunctionPair:
+        return PythonSignatureNativeFunctionPair(
+            signature=signature(f, method=method, pyi=pyi),
+            function=f,
+        )
+
+    pairs = list(map(gen_signature_pairs, native_functions))
+    deprecated = load_deprecated_signatures(
+        pairs, deprecated_yaml_path, method=method, pyi=pyi
+    )
+    return pairs if skip_deprecated else pairs + deprecated
+
+
+def load_deprecated_signatures(
+    pairs: Sequence[PythonSignatureNativeFunctionPair],
+    deprecated_yaml_path: str,
+    *,
+    method: bool,
+    pyi: bool,
+) -> list[PythonSignatureNativeFunctionPair]:
+    # The deprecated.yaml doesn't have complete type information, we need
+    # find and leverage the original ATen signature (to which it delegates
+    # the call) to generate the full python signature.
+    # We join the deprecated and the original signatures using type-only form.
+
+    # group the original ATen signatures by name
+    grouped: dict[str, list[PythonSignatureNativeFunctionPair]] = defaultdict(list)
+    for pair in pairs:
+        grouped[pair.signature.name].append(pair)
+
+    # find matching original signatures for each deprecated signature
+    results: list[PythonSignatureNativeFunctionPair] = []
+
+    with open(deprecated_yaml_path) as f:
+        deprecated_defs = yaml.load(f, Loader=YamlLoader)
+
+    for deprecated in deprecated_defs:
+        schema = FunctionSchema.parse(deprecated["name"])
+        aten_name, call_args = split_name_params(deprecated["aten"])
+        is_out = aten_name.endswith("_out")
+        if is_out:
+            aten_name = aten_name.replace("_out", "")
+
+        # HACK: these are fixed constants used to pass the aten function.
+        # The type must be known ahead of time
+        known_constants = {
+            "1": Type.parse("Scalar"),
+        }
+        schema_args_by_name = {a.name: a for a in schema.arguments.flat_all}
+        for name in call_args:
+            assert (
+                name in schema_args_by_name or name in known_constants
+            ), f"deprecation definiton: Unrecognized value {name}"
+
+        # Map deprecated signature arguments to their aten signature and test
+        # if the types and alias annotation match.
+        def is_schema_compatible(
+            aten_schema: FunctionSchema,
+        ) -> bool:
+            arguments: Iterable[Argument]
+            if is_out:
+                arguments = itertools.chain(
+                    aten_schema.arguments.out, aten_schema.arguments.flat_non_out
+                )
+            else:
+                arguments = aten_schema.arguments.flat_all
+
+            for i, arg in enumerate(arguments):
+                if i < len(call_args):
+                    arg_name = call_args[i]
+                    if arg_name in known_constants:
+                        schema_type = known_constants[arg_name]
+                        schema_annotation = None
+                    else:
+                        schema_arg = schema_args_by_name[arg_name]
+                        schema_type = schema_arg.type
+                        schema_annotation = schema_arg.annotation
+
+                    if schema_type != arg.type or schema_annotation != arg.annotation:
+                        return False
+                else:
+                    if arg.default is None:
+                        return False
+
+            return len(schema.returns) == len(aten_schema.returns) and all(
+                a == b for a, b in zip(schema.returns, aten_schema.returns)
+            )
+
+        any_schema_found = False
+        for pair in grouped[aten_name]:
+            if not is_schema_compatible(pair.function.func):
+                continue
+            any_schema_found = True
+
+            python_sig = signature_from_schema(
+                schema,
+                category_override=pair.function.category_override,
+                method=method,
+                pyi=pyi,
+            )
+
+            results.append(
+                PythonSignatureNativeFunctionPair(
+                    signature=PythonSignatureDeprecated(
+                        name=python_sig.name,
+                        input_args=python_sig.input_args,
+                        input_kwargs=python_sig.input_kwargs,
+                        output_args=python_sig.output_args,
+                        tensor_options_args=python_sig.tensor_options_args,
+                        method=python_sig.method,
+                        deprecated_schema=schema,
+                        deprecated_args_exprs=tuple(call_args),
+                        returns=python_sig.returns,
+                    ),
+                    function=pair.function,
+                )
+            )
+        assert (
+            any_schema_found
+        ), f"No native function with name {aten_name} matched signature:\n  {str(schema)}"
+
+    return results
+
+
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+#
+#                         Named Tuple Codegen
+#
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+
+
+@with_native_function
+def gen_structseq_typename_key(f: NativeFunction) -> str:
+    name = cpp.name(f.func)
+    fieldnames = structseq_fieldnames(f.func.returns)
+    return "_".join([name] + fieldnames)
+
+
+def emit_structseq_call(
+    overloads: Sequence[PythonSignatureNativeFunctionPair],
+) -> tuple[list[str], dict[str, str]]:
+    """
+    Generate block of named tuple type def inits, and add typeref snippets
+    to declarations that use them
+    """
+    typenames: dict[
+        str, str
+    ] = {}  # map from unique name + field name lists to typedef name
+    typedefs: list[str] = []  # typedef declarations and init code
+
+    for overload in overloads:
+        fieldnames = structseq_fieldnames(overload.function.func.returns)
+        if not fieldnames:
+            continue
+
+        name = cpp.name(overload.function.func)  # use @with_native_function?
+        tn_key = gen_structseq_typename_key(overload.function)
+        typename = typenames.get(tn_key)
+        if typename is None:
+            typename = f'NamedTuple{"" if not typedefs else len(typedefs)}'
+            typenames[tn_key] = typename
+            typedefs.append(
+                f"""\
+static PyTypeObject* {typename} = generated::get_{name}_structseq();"""
+            )
+
+    return typedefs, typenames
+
+
+def generate_return_type_definition_and_registrations(
+    overloads: Sequence[PythonSignatureNativeFunctionPair],
+) -> tuple[list[str], list[str]]:
+    """
+    Generate block of function in `python_return_types.cpp` to initialize
+    and return named tuple for a native function which returns named tuple
+    and registration invocations in same file.
+    """
+    typenames: dict[
+        str, str
+    ] = {}  # map from unique name + field name lists to typedef name
+    definitions: list[str] = []  # function definition to register the typedef
+    registrations: list[str] = []  # register call for the typedef
+
+    for overload in overloads:
+        fieldnames = structseq_fieldnames(overload.function.func.returns)
+        if not fieldnames:
+            continue
+
+        fields = ", ".join(f'{{"{fn}", ""}}' for fn in fieldnames)
+
+        name = cpp.name(overload.function.func)  # use @with_native_function?
+        tn_key = gen_structseq_typename_key(overload.function)
+        typename = typenames.get(tn_key)
+
+        if typename is None:
+            typename = f'{name}NamedTuple{"" if not definitions else len(definitions)}'
+            typenames[tn_key] = typename
+            definitions.append(
+                f"""\
+PyTypeObject* get_{name}_structseq() {{
+    static PyStructSequence_Field NamedTuple_fields[] = {{ {fields},  {{nullptr}} }};
+    static PyTypeObject {typename};
+    static bool is_initialized = false;
+    static PyStructSequence_Desc desc = {{ "torch.return_types.{name}", nullptr, NamedTuple_fields, {len(fieldnames)} }};
+    if (!is_initialized) {{
+        PyStructSequence_InitType(&{typename}, &desc);
+        {typename}.tp_repr = (reprfunc)torch::utils::returned_structseq_repr;
+        is_initialized = true;
+    }}
+    return &{typename};
+}}
+"""
+            )
+            registrations.append(
+                f'addReturnType(return_types_module, "{name}", generated::get_{name}_structseq());'
+            )
+
+    return definitions, registrations
+
+
+def generate_return_type_declarations(
+    overloads: Sequence[PythonSignatureNativeFunctionPair],
+) -> list[str]:
+    """
+    Generate block of function declarations in `python_return_types.h` to initialize
+    and return named tuple for a native function.
+    """
+    typenames: dict[
+        str, str
+    ] = {}  # map from unique name + field name lists to typedef name
+    declarations: list[str] = []  # function declaration to register the typedef
+
+    for overload in overloads:
+        fieldnames = structseq_fieldnames(overload.function.func.returns)
+        if not fieldnames:
+            continue
+
+        name = cpp.name(overload.function.func)  # use @with_native_function?
+        tn_key = gen_structseq_typename_key(overload.function)
+        typename = typenames.get(tn_key)
+
+        if typename is None:
+            typename = (
+                f'{name}NamedTuple{"" if not declarations else len(declarations)}'
+            )
+            typenames[tn_key] = typename
+            declarations.append(f"PyTypeObject* get_{name}_structseq();")
+
+    return declarations
+
+
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+#
+#                         Method Impl Codegen
+#
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+
+# python binding for all overloads of a particular function/method
+PY_VARIABLE_METHOD_VARARGS = CodeTemplate(
+    r"""\
+// ${name}
+static PyObject * ${pycname}(PyObject* self_, PyObject* args, PyObject* kwargs)
+{
+  ${method_header}
+  static PythonArgParser parser({
+    ${signatures}
+  }, /*traceable=*/${traceable});
+
+  ParsedArgs<${max_args}> parsed_args;
+  auto _r = parser.parse(${self_}, args, kwargs, parsed_args);
+  ${check_has_torch_function}
+  switch (_r.idx) {
+    ${dispatch}
+  }
+  ${method_footer}
+}
+
+"""
+)
+
+# handler for a single parsed signature - may be a single overload or
+# a pair of overloads that whose signatures only differ in output params
+# (plugged into PY_VARIABLE_METHOD_VARARGS as an item in ${dispatch})
+PY_VARIABLE_CASE = CodeTemplate(
+    """\
+case ${overload_index}: {
+  ${body}
+}
+"""
+)
+
+# python binding for single-overload function/method
+PY_VARIABLE_METHOD_VARARGS_SINGLETON = CodeTemplate(
+    """\
+// ${name}
+static PyObject * ${pycname}(PyObject* self_, PyObject* args, PyObject* kwargs)
+{
+  ${method_header}
+  static PythonArgParser parser({
+    ${signatures}
+  }, /*traceable=*/${traceable});
+
+  ParsedArgs<${max_args}> parsed_args;
+  auto _r = parser.parse(${self_}, args, kwargs, parsed_args);
+  ${check_has_torch_function}
+  ${dispatch}
+  ${method_footer}
+}
+
+"""
+)
+
+# python binding for a method with no args, shortcuts parsing
+PY_VARIABLE_METHOD_NOARGS = CodeTemplate(
+    """\
+// ${name}
+static PyObject * ${pycname}(PyObject* self_, PyObject* args)
+{
+  ${method_header}
+  ${check_has_torch_function}
+  ${dispatch}
+  ${method_footer}
+}
+
+"""
+)
+
+
+def method_impl(
+    name: BaseOperatorName,
+    module: str | None,
+    overloads: Sequence[PythonSignatureNativeFunctionPair],
+    *,
+    method: bool,
+    symint: bool = True,
+) -> str:
+    """
+    Generate a python binding for all overloads of an op.
+    """
+    pycname = get_pycname(name)
+    noarg = is_noarg(overloads)
+    structseq_inits, structseq_typenames = emit_structseq_call(overloads)
+
+    method_header = ["HANDLE_TH_ERRORS"]
+    method_header += structseq_inits
+    method_header += (
+        ["const Tensor& self = THPVariable_Unpack(self_);"] if method else []
+    )
+
+    method_footer = ([] if noarg else ["Py_RETURN_NONE;"]) + ["END_HANDLE_TH_ERRORS"]
+
+    traceable = "true" if all(should_trace(o.function) for o in overloads) else "false"
+
+    grouped_overloads: Sequence[PythonSignatureGroup] = group_overloads(
+        overloads, symint=symint
+    )
+    is_singleton = len(grouped_overloads) == 1
+    signatures: list[str] = []
+    dispatch: list[str] = []
+    for overload_index, overload in enumerate(grouped_overloads):
+        signature = overload.signature.signature_str(symint=symint)
+        signatures.append(f"{cpp_string(str(signature))},")
+        dispatch_body = emit_dispatch_case(overload, structseq_typenames, symint=symint)
+        dispatch.append(
+            PY_VARIABLE_CASE.substitute(
+                overload_index=overload_index, body=dispatch_body
+            )
+            if not is_singleton
+            else dispatch_body
+        )
+
+    if noarg:
+        template = PY_VARIABLE_METHOD_NOARGS
+    elif is_singleton:
+        template = PY_VARIABLE_METHOD_VARARGS_SINGLETON
+    else:
+        template = PY_VARIABLE_METHOD_VARARGS
+
+    return template.substitute(
+        name=name,
+        pycname=pycname,
+        method_header=method_header,
+        max_args=max(o.signature.arguments_count() for o in overloads),
+        signatures=signatures,
+        traceable=traceable,
+        check_has_torch_function=gen_has_torch_function_check(
+            name=name,
+            module=module,
+            noarg=noarg,
+            method=method,
+        ),
+        dispatch=dispatch,
+        method_footer=method_footer,
+        self_="self_" if method else "nullptr",
+    )
+
+
+def gen_has_torch_function_check(
+    name: BaseOperatorName, module: str | None, *, noarg: bool, method: bool
+) -> str:
+    if noarg:
+        if method:
+            return f"""\
+if(check_has_torch_function(self_)) {{
+  return handle_torch_function(self_, "{name}");
+}}
+"""
+        else:
+            return ""
+
+    self_ = "self_" if method else "nullptr"
+    namespace = (
+        {
+            "torch": "THPVariableFunctionsModule",
+            "torch.nn": "THPNNVariableFunctionsModule",
+            "torch.fft": "THPFFTVariableFunctionsModule",
+            "torch.linalg": "THPLinalgVariableFunctionsModule",
+            "torch.nested": "THPNestedVariableFunctionsModule",
+            "torch.sparse": "THPSparseVariableFunctionsModule",
+            "torch.special": "THPSpecialVariableFunctionsModule",
+        }[module]
+        if module
+        else "THPVariableClass"
+    )
+
+    return f"""\
+if(_r.has_torch_function()) {{
+  return handle_torch_function(_r, {self_}, args, kwargs, {namespace}, "{module or "torch.Tensor"}");
+}}
+"""
+
+
+# handler for output/no-output overload pair
+PY_VARIABLE_OUT = CodeTemplate(
+    """\
+if (_r.isNone(${out_idx})) {
+  ${call_dispatch}
+} else {
+  ${call_dispatch_out}
+}
+"""
+)
+
+
+def emit_dispatch_case(
+    overload: PythonSignatureGroup,
+    structseq_typenames: dict[str, str],
+    *,
+    symint: bool = True,
+) -> str:
+    """
+    Emit dispatch code for a single parsed signature. This corresponds to either
+    a single native function, or a pair that differ only in output params. In the
+    latter case, a single python signature is used for both and dispatching
+    switches on the presence/absence of passed output args.
+    """
+    if overload.outplace is not None:
+        # dispatch output and no-output variants, branch on _r.isNone(<out_idx>)
+        return PY_VARIABLE_OUT.substitute(
+            out_idx=overload.signature.output_idx(),
+            call_dispatch=emit_single_dispatch(
+                overload.signature, overload.base, structseq_typenames, symint=symint
+            ),
+            call_dispatch_out=emit_single_dispatch(
+                overload.signature,
+                overload.outplace,
+                structseq_typenames,
+                symint=symint,
+            ),
+        )
+    else:
+        # no-output version only
+        return emit_single_dispatch(
+            overload.signature, overload.base, structseq_typenames, symint=symint
+        )
+
+
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+#
+#                    Forward Declarations Codegen
+#
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+
+
+def forward_decls(
+    name: BaseOperatorName,
+    overloads: Sequence[PythonSignatureNativeFunctionPair],
+    *,
+    method: bool,
+) -> tuple[str, ...]:
+    if method:
+        return ()
+
+    pycname = get_pycname(name)
+    if is_noarg(overloads):
+        return (
+            f"""\
+static PyObject * {pycname}(PyObject* self_, PyObject* args);
+""",
+        )
+    else:
+        return (
+            f"""\
+static PyObject * {pycname}(PyObject* self_, PyObject* args, PyObject* kwargs);
+""",
+        )
+
+
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+#
+#              Method Def (Binding Table Entry) Codegen
+#
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+
+
+def method_def(
+    name: BaseOperatorName,
+    module: str | None,
+    overloads: Sequence[PythonSignatureNativeFunctionPair],
+    *,
+    method: bool,
+) -> str:
+    """
+    Generate method def entry.
+    """
+    pycname = get_pycname(name)
+
+    if name.dunder_method:
+        # PyMethodDef entry for binary op, throws not implemented error
+        pycname = f"TypeError_to_NotImplemented_<{pycname}>"
+
+    if is_noarg(overloads):
+        flags = "METH_NOARGS" if method else "METH_VARARGS | METH_KEYWORDS"
+    else:
+        pycname = f"castPyCFunctionWithKeywords({pycname})"
+        flags = "METH_VARARGS | METH_KEYWORDS"
+
+    if module == "torch":
+        flags += " | METH_STATIC"
+
+    return f'{{"{name}", {pycname}, {flags}, NULL}},'
+
+
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+#
+#                   Overload Sorting and Grouping
+#
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+
+
+def group_overloads(
+    overloads: Sequence[PythonSignatureNativeFunctionPair], *, symint: bool = True
+) -> Sequence[PythonSignatureGroup]:
+    bases: dict[str, PythonSignatureNativeFunctionPair] = {}
+    outplaces: dict[str, PythonSignatureNativeFunctionPair] = {}
+
+    # first group by signature ignoring out arguments
+    for overload in overloads:
+        sig = overload.signature.signature_str(skip_outputs=True, symint=symint)
+        if overload.function.func.is_out_fn():
+            if sig in outplaces:
+                raise RuntimeError(
+                    f"Found duplicated function definition:\n- {overload.function.func}.\n"
+                    f"Existing definition:\n- {outplaces[sig].function.func}."
+                )
+            outplaces[sig] = overload
+        else:
+            if sig in bases:
+                raise RuntimeError(
+                    f"Found duplicated function definition:\n- {overload.function.func}.\n"
+                    f"Existing definition:\n- {bases[sig].function.func}."
+                )
+            bases[sig] = overload
+
+    for sig, out in outplaces.items():
+        if sig not in bases:
+            candidates: list[str] = []
+            for overload in overloads:
+                if (
+                    str(overload.function.func.name.name)
+                    == str(out.function.func.name.name)
+                    and not overload.function.func.is_out_fn()
+                    and not overload.signature.deprecated
+                ):
+                    candidates.append(
+                        overload.signature.signature_str(
+                            skip_outputs=True, symint=symint
+                        )
+                    )
+            out_sig = out.signature.signature_str(symint=symint)
+            raise RuntimeError(
+                f"While identifying overloads, we found an out schema {out_sig} without a corresponding non-out variant. "
+                f"We expected the non-out variant to have schema: \n- {sig}\nPlease check that you spelled the schema "
+                "correctly in native_functions.yaml. We discovered the following candidate(s): \n"
+                + "\n".join(f"- {candidate}" for candidate in candidates)
+            )
+
+    grouped = [
+        PythonSignatureGroup.from_pairs(
+            functional=base,
+            out=outplaces.get(sig),
+        )
+        for sig, base in bases.items()
+    ]
+    return sort_overloads(grouped, symint=symint)
+
+
+# This function declares a partial order on declarations, and sorts them according
+# to its linear extension. This is necessary, because there's some ambiguity in the
+# choice of overload, and we want a different order.
+#
+# See Note[Order of overloads matters]
+#
+# A few examples of ambiguous python signature pairs.
+#
+#   All parameters have the same type, except one taking Tensor the other taking
+#   Scalar. A numeric PyObject can be casted into Tensor, and a zero-dim Tensor
+#   object can be accepted as Scalar type parameter (see python_arg_parser.cpp).
+#   Therefore, same input arguments might be accepted by either python signature.
+#   We want to always parse the one taking Tensor first.
+#
+#     bitwise_and(Tensor input, Tensor other, *, Tensor out=None)
+#     bitwise_and(Tensor input, Scalar other, *, Tensor out=None)
+#
+#   If they have different number of parameters then they are not ambiguous - but
+#   the difference on output param can be ignored as it's optional.
+#
+#     multiply(Tensor input, Tensor other, *, Tensor out=None)
+#     multiply(Tensor input, Scalar other)
+#
+#   Both positional args and keyword-only args are considered together.
+#
+#     subtract(Tensor other, *, Scalar alpha=1)
+#     subtract(Scalar other, Scalar alpha=1)
+#
+# A few ambiguous cases which it does NOT handle yet.
+#
+#   If there is any difference in other parameters besides the Tensor/Scalar
+#   difference, then they are not considered ambiguous by this method anymore.
+#   However, the difference could be too trivial to disambiguate.
+#
+#     foo(Tensor input, Scalar other, Scalar bar)
+#     foo(Tensor input, Tensor other, double bar)
+#
+#   If they are taking different number of parameters then they are not considered
+#   ambiguous anymore, even if the difference is only on optional kwargs.
+#
+#     foo(Scalar other, Scalar alpha=1)
+#     foo(Tensor other, *, Scalar alpha=1, Scalar beta=1)
+#
+
+
+def sort_overloads(
+    grouped_overloads: Sequence[PythonSignatureGroup], *, symint: bool = True
+) -> Sequence[PythonSignatureGroup]:
+    # NB: Smaller here means lower priority
+
+    def is_arg_smaller(t1: Type, t2: Type) -> bool:
+        return (
+            str(t1) == "Scalar"
+            and str(t2) == "Tensor"
+            or str(t1) == "Scalar?"
+            and str(t2) == "Tensor?"
+            or "Dimname" in str(t1)
+            and "Dimname" not in str(t2)
+            or
+            # In the discussion https://github.com/pytorch/pytorch/issues/54555 it has been
+            # discussed why it is important to prioritize int/int? over int[]
+            str(t1) == "int[]"
+            and (str(t2) == "int" or str(t2) == "int?")
+            or
+            # TensorList currently throws an error during argument parsing, that's why it needs to be
+            # last in signature ordering. See discussion: https://github.com/pytorch/pytorch/issues/58087
+            str(t1) == "Tensor[]"
+            and str(t2).find("[]") != -1
+            or
+            # Prioritize IntArrayRef overload over SymIntArrayRef
+            str(t1) == "SymInt[]"
+            and str(t2) == "int[]"
+            or
+            # Make sure both in, SymInt are sorted consistently w.r.t. Tensor since Tensor can be implicitly
+            # converted to either int or SymInt.  Prioritize the Tensor overload since it otherwise gets shadowed.
+            (str(t1) == "SymInt" or str(t1) == "int")
+            and str(t2) == "Tensor"
+        )
+
+    def is_smaller(s1: PythonSignature, s2: PythonSignature) -> bool:
+        """Returns True if s1 < s2 in the partial order."""
+        args1, args2 = s1.arguments(skip_outputs=True), s2.arguments(skip_outputs=True)
+        if len(args1) != len(args2):
+            return False
+        # TODO: should use some canonical form instead of 'str(arg.type)' - see comments
+        # above. The old codegen used the deprecated 'dynamic_type(arg.type)', which
+        # ignores the optional annotation, i.e. 'Scalar' and 'Scalar?'.
+        equal = all(arg1.type == arg2.type for arg1, arg2 in zip(args1, args2))
+        smaller_or_equal = all(
+            str(arg1.type) == str(arg2.type) or is_arg_smaller(arg1.type, arg2.type)
+            for arg1, arg2 in zip(args1, args2)
+        )
+        return smaller_or_equal and not equal
+
+    # First sort by signature
+    grouped_overloads = sorted(
+        grouped_overloads, key=lambda x: x.signature.signature_str(symint=symint)
+    )
+
+    # Construct the relation graph
+    larger_than: dict[int, set[int]] = defaultdict(set)
+    for i1, overload1 in enumerate(grouped_overloads):
+        for i2, overload2 in enumerate(grouped_overloads):
+            if is_smaller(overload1.signature, overload2.signature):
+                larger_than[i1].add(i2)
+
+    if not larger_than:
+        return list(grouped_overloads)
+
+    # Use a topological sort to sort overloads according to the partial order.
+    N = len(grouped_overloads)
+    sorted_ids: list[int] = list(filter(lambda x: x not in larger_than, range(N)))
+
+    for idx in range(N):
+        # The size of sorted_ids will grow to N eventually.
+        i = sorted_ids[idx]
+        for j in sorted(larger_than.keys()):
+            larger = larger_than[j]
+            larger.discard(i)
+            if not larger:
+                del larger_than[j]
+                sorted_ids.append(j)
+
+    return [grouped_overloads[x] for x in sorted_ids]
+
+
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+#
+#                       Codegen API Integration
+#
+# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #
+
+
+def emit_single_dispatch(
+    ps: PythonSignature,
+    f: NativeFunction,
+    structseq_typenames: dict[str, str],
+    *,
+    symint: bool = True,
+) -> str:
+    """
+    Emit dispatch code for a single native function.
+    """
+
+    @with_native_function
+    def go(f: NativeFunction) -> str:
+        # header comments
+        if isinstance(ps, PythonSignatureDeprecated):
+            schema_comment = f"// [deprecated] aten::{ps.deprecated_schema}"
+        else:
+            schema_comment = f"// aten::{f.func}"
+
+        deprecated = "[deprecated] " if ps.deprecated else ""
+
+        # dispatch lambda signature
+        name = cpp.name(f.func)
+        lambda_formals = ", ".join(
+            f"{a.type_str} {a.name}" for a in dispatch_lambda_args(ps, f, symint=symint)
+        )
+        lambda_return = dispatch_lambda_return_str(f)
+
+        # dispatch lambda body
+        dispatch_callee = cpp_dispatch_target(f)
+        dispatch_args = ", ".join(cpp_dispatch_exprs(f, python_signature=ps))
+
+        # from arg parser outputs to dispatch lambda arguments
+        parser_outputs = arg_parser_output_exprs(ps, f, symint=symint)
+        lambda_arg_exprs = dispatch_lambda_exprs(ps, f, symint=symint)
+        inits = "\n".join(lambda_arg_exprs.inits)
+        lambda_args = ", ".join(lambda_arg_exprs.exprs)
+
+        # scatter fields
+        # TODO: Checking `ps.method and ('requires_grad' in parser_outputs)` is a hacky
+        #       solution for enabling the 'requires_grad' argument for tensor methods
+        #       new_full, new_empty, and new_zeros. A much better but more difficult to
+        #       implement solution involves refactoring according to Ed's description here:
+        #       https://github.com/pytorch/pytorch/issues/36455#issuecomment-614767589
+        need_set_requires_grad = ps.tensor_options_args and (
+            not has_tensor_options(f)
+            or (ps.method and ("requires_grad" in parser_outputs))
+        )
+        set_requires_grad = (
+            f'.set_requires_grad({parser_outputs["requires_grad"].expr})'
+            if need_set_requires_grad
+            else ""
+        )
+
+        if lambda_return == "void":
+            # Make in-place foreach return `self` at python-binding level.
+            # ref: https://github.com/pytorch/pytorch/pull/118622#pullrequestreview-1904804954
+            self_arg = f.func.arguments.self_arg
+            return_stmt: str
+            if (
+                str(f.func.name).startswith("_foreach_")
+                and f.func.kind() == SchemaKind.inplace
+            ):
+                # note(crcrpar): `_foreach_pow.ScalarAndTensor` does NOT have its in-place
+                # variant and it unlikely to have it in the future. Thus it's safe to have the following assert.
+                assert self_arg is not None and is_tensor_list_type(
+                    self_arg.argument.type
+                )
+                return_stmt = """PyObject* self_tensorlist = _r.args[0];
+Py_INCREF(self_tensorlist);
+return self_tensorlist;
+"""
+            else:
+                return_stmt = "Py_RETURN_NONE;"
+            return f"""\
+{schema_comment}
+{inits}
+auto dispatch_{name} = []({lambda_formals}) -> {lambda_return} {{
+  pybind11::gil_scoped_release no_gil;
+  {dispatch_callee}({dispatch_args});
+}};
+dispatch_{name}({lambda_args}){set_requires_grad};
+{return_stmt}
+"""
+        else:
+            typename = structseq_typenames.get(gen_structseq_typename_key(f))
+            structseq_typeref = f"{typename}, " if typename is not None else ""
+            return f"""\
+{schema_comment}
+{inits}
+auto dispatch_{name} = []({lambda_formals}) -> {lambda_return} {{
+  pybind11::gil_scoped_release no_gil;
+  return {dispatch_callee}({dispatch_args});
+}};
+return wrap({structseq_typeref}dispatch_{name}({lambda_args}){set_requires_grad});
+"""
+
+    return go(f)

minigpt2/lib/python3.10/site-packages/torchgen/packaged/autograd/gen_variable_factories.py

@@ -0,0 +1,116 @@
+# Generates C++ functions that wrap ATen tensor factory methods to turn them into Variables.
+#
+# This writes one file: variable_factories.h
+
+from __future__ import annotations
+
+import re
+
+import torchgen.api.python as python
+from torchgen.api import cpp
+from torchgen.api.types import CppSignatureGroup
+from torchgen.context import with_native_function
+from torchgen.gen import parse_native_yaml
+from torchgen.model import NativeFunction, TensorOptionsArguments, Variant
+from torchgen.utils import FileManager, mapMaybe
+
+
+OPTIONAL_TYPE_PATTERN = re.compile(r"std::optional<(.+)>")
+TYPE_PATTERN = re.compile(r"(?:const\s+)?([A-Z]\w+)")
+
+
+# Add 'at::' to types defined in ATen namespace, e.g. Tensor, TensorList, IntArrayRef and etc.
+# TODO: maybe update the cpp argument API to take optional namespace argument?
+def fully_qualified_type(argument_type: str) -> str:
+    def maybe_optional_type(type: str, is_opt: bool) -> str:
+        return f"std::optional<{type}>" if is_opt else type
+
+    opt_match = OPTIONAL_TYPE_PATTERN.match(argument_type)
+    is_opt = opt_match is not None
+    if opt_match:
+        argument_type = argument_type[opt_match.start(1) : opt_match.end(1)]
+    match = TYPE_PATTERN.match(argument_type)
+    if match is None:
+        return maybe_optional_type(argument_type, is_opt)
+    index = match.start(1)
+    qualified_type = f"{argument_type[:index]}at::{argument_type[index:]}"
+    return maybe_optional_type(qualified_type, is_opt)
+
+
+def gen_variable_factories(
+    out: str, native_yaml_path: str, tags_yaml_path: str, template_path: str
+) -> None:
+    native_functions = parse_native_yaml(
+        native_yaml_path, tags_yaml_path
+    ).native_functions
+    factory_functions = [fn for fn in native_functions if is_factory_function(fn)]
+    fm = FileManager(install_dir=out, template_dir=template_path, dry_run=False)
+    fm.write_with_template(
+        "variable_factories.h",
+        "variable_factories.h",
+        lambda: {
+            "generated_comment": "@"
+            + f"generated from {fm.template_dir_for_comments()}/variable_factories.h",
+            "ops_headers": [
+                f"#include <ATen/ops/{fn.root_name}.h>" for fn in factory_functions
+            ],
+            "function_definitions": list(mapMaybe(process_function, factory_functions)),
+        },
+    )
+
+
+@with_native_function
+def is_factory_function(f: NativeFunction) -> bool:
+    if Variant.function not in f.variants:
+        return False
+
+    name = cpp.name(f.func)
+    has_tensor_options = python.has_tensor_options(f)
+    return has_tensor_options or name.endswith("_like")
+
+
+@with_native_function
+def process_function(f: NativeFunction) -> str | None:
+    name = cpp.name(f.func)
+    has_tensor_options = python.has_tensor_options(f)
+    is_factory = has_tensor_options or name.endswith("_like")
+
+    if Variant.function not in f.variants or not is_factory:
+        return None
+
+    cpp_sigs = CppSignatureGroup.from_native_function(f, method=False)
+    sigs = [cpp_sigs.signature]
+    if cpp_sigs.symint_signature is not None:
+        sigs.append(cpp_sigs.symint_signature)
+    r = ""
+    for sig in sigs:
+        formals: list[str] = []
+        exprs: list[str] = []
+        requires_grad = "false"
+        for arg in sig.arguments():
+            qualified_type = fully_qualified_type(arg.type)
+            if arg.default:
+                formals.append(f"{qualified_type} {arg.name} = {arg.default}")
+            else:
+                formals.append(f"{qualified_type} {arg.name}")
+
+            if isinstance(arg.argument, TensorOptionsArguments):
+                # note: we remove the requires_grad setting from the TensorOptions because
+                # it is ignored anyways (and we actually have an assertion that it isn't set
+                # which would fail otherwise). We handle requires_grad explicitly here
+                # instead of passing it through to the kernel.
+                exprs.append(
+                    f"at::TensorOptions({arg.name}).requires_grad(::std::nullopt)"
+                )
+                # Manually set the requires_grad bit on the result tensor.
+                requires_grad = f"{arg.name}.requires_grad()"
+            else:
+                exprs.append(arg.name)
+
+        r += f"""\
+inline at::Tensor {sig.name()}({', '.join(formals)}) {{
+  at::AutoDispatchBelowADInplaceOrView guard;
+  return autograd::make_variable(at::{sig.name()}({', '.join(exprs)}), /*requires_grad=*/{requires_grad});
+}}
+"""
+    return r

minigpt2/lib/python3.10/site-packages/torchgen/packaged/autograd/gen_view_funcs.py

@@ -0,0 +1,340 @@
+# Generates ViewFuncs.h/cpp
+#
+# NOTE: If any changes are being made to the ViewFunc codegen please also check
+# if updates are needed in torch/csrc/autograd/autograd_not_implemented_fallback.cpp
+# The fallback is expected to mimic this codegen, so we should keep the two in sync.
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+import torchgen.api.dispatcher as dispatcher
+from torchgen.api.translate import translate
+from torchgen.api.types import (
+    BaseCType,
+    Binding,
+    NamedCType,
+    SymIntT,
+    tensorT,
+    VectorCType,
+)
+from torchgen.code_template import CodeTemplate
+from torchgen.model import Argument, NativeFunction, OptionalType
+from torchgen.utils import FileManager
+
+from .gen_inplace_or_view_type import (
+    CALL_DISPATCH,
+    extract_bindings,
+    get_view_info,
+    modifies_arguments,
+    use_derived,
+)
+
+
+if TYPE_CHECKING:
+    from torchgen.api.autograd import NativeFunctionWithDifferentiabilityInfo
+
+
+FUNCTION_DECLARATION = CodeTemplate(
+    """\
+#define ${uppercase_op}_AVAILABLE
+struct ${op} : public ${superclass} {
+  ${op}(${constructor_args}) ${initializer_list}
+  {};
+  virtual ~${op}() override {};
+  virtual std::vector<c10::SymInt> get_symints() const override;
+  virtual size_t num_symints() const override;
+  virtual std::vector<at::Tensor> get_tensors() const override;
+  virtual size_t num_tensors() const override;
+  virtual at::Tensor operator()(const at::Tensor&) const override;
+  virtual std::unique_ptr<ViewFunc> clone_and_set(
+      std::optional<std::vector<c10::SymInt>> = ::std::nullopt,
+      std::optional<std::vector<at::Tensor>> = ::std::nullopt) const override;
+
+protected:
+  virtual void set_symints(std::vector<c10::SymInt>) override;
+  virtual void set_tensors(std::vector<at::Tensor>) override;
+
+private:
+  ${state}
+};
+
+"""
+)
+
+FUNCTION_DEFINITION = CodeTemplate(
+    """\
+std::vector<c10::SymInt> ${op}::get_symints() const {
+  ${get_symints}
+}
+
+size_t ${op}::num_symints() const {
+  return static_cast<size_t>(${num_symints});
+}
+
+void ${op}::set_symints(std::vector<c10::SymInt> ${symints_vec}) {
+  TORCH_INTERNAL_ASSERT(${symints_vec}.size() == num_symints());
+  ${set_symints}
+}
+
+std::vector<at::Tensor> ${op}::get_tensors() const {
+  ${get_tensors}
+}
+
+size_t ${op}::num_tensors() const {
+  return static_cast<size_t>(${num_tensors});
+}
+
+void ${op}::set_tensors(std::vector<at::Tensor> ${tensors_vec}) {
+  TORCH_INTERNAL_ASSERT(${tensors_vec}.size() == num_tensors());
+  ${set_tensors}
+}
+
+at::Tensor ${op}::operator()(const at::Tensor& ${call_input_name}) const {
+  return ${op_call};
+}
+
+std::unique_ptr<ViewFunc> ${op}::clone_and_set(
+    std::optional<std::vector<c10::SymInt>> ${symints_vec},
+    std::optional<std::vector<at::Tensor>> ${tensors_vec}) const {
+  auto output = std::make_unique<${op}>(${clone_args});
+  if (${symints_vec}.has_value()) {
+    output->set_symints(std::move(*(${symints_vec})));
+  }
+  if (${tensors_vec}.has_value()) {
+    output->set_tensors(std::move(*(${tensors_vec})));
+  }
+  return output;
+}
+
+"""
+)
+
+
+# e.g. as_strided -> AsStridedViewFunc for camel case or
+# as_strided_view_func otherwise
+def view_func_name(
+    f: NativeFunction, include_namespace: bool = False, camel_case: bool = True
+) -> str:
+    name = f.func.name.unambiguous_name()
+    view_func_name = f"{name.replace('.', '_')}_view_func"
+    if camel_case:
+        is_private = view_func_name.startswith("_")
+        view_func_name = "".join(
+            [p.title() for p in view_func_name.replace(".", "_").split("_")]
+        )
+        if is_private:
+            # put the leading underscore back in
+            view_func_name = f"_{view_func_name}"
+    namespace = "torch::autograd::generated::" if include_namespace else ""
+    return f"{namespace}{view_func_name}"
+
+
+def is_symint_or_tensor(arg: Argument) -> bool:
+    return arg.type.is_tensor_like() or arg.type.is_symint_like()
+
+
+def remove_const_ref(binding: Binding) -> Binding:
+    return Binding(
+        name=binding.name,
+        nctype=binding.nctype.remove_const_ref(),
+        argument=binding.argument,
+        default=binding.default,
+    )
+
+
+def returns_multi_tensor(fn: NativeFunction) -> bool:
+    returns = fn.func.returns
+    assert len(returns) == 1
+    returns_list_like = returns[0].type.is_list_like() is not None
+    returns_tensor_like = returns[0].type.is_tensor_like()
+    return returns_list_like and returns_tensor_like
+
+
+# Generates strings with logic for getting / setting state of a particular type.
+#
+# Args:
+#   bindings (list): List of state bindings of interest (may be empty)
+#   state_vec_type (NamedCType): Type of vector to either return or copy from
+#
+# Returns:
+#   tuple: (list of getter logic strings, list of setter logic strings, string
+#     with num items expression)
+def generate_state_getter_setter(
+    bindings: list[Binding],
+    state_vec_type: NamedCType,
+) -> tuple[list[str], list[str], str]:
+    getter_logic = []
+    setter_logic = []
+
+    state_vec = state_vec_type.name
+    getter_logic.append(f"{state_vec_type.cpp_type()} {state_vec};")
+    if len(bindings) > 0:
+        setter_logic.append("auto i = 0;")
+
+    num_exprs = []
+    for i, b in enumerate(bindings):
+        assert isinstance(b.argument, Argument)
+        if b.argument.type.is_list_like():
+            # Handle list-likes.
+            num_expr = f"{b.name}.size()"
+            num_exprs.append(num_expr)
+            getter = f"{state_vec}.insert({state_vec}.end(), {b.name}.begin(), {b.name}.end());"
+            setter = f"std::copy({state_vec}.begin() + i, {state_vec}.begin() + i + {b.name}.size(), {b.name}.begin());"
+        elif isinstance(b.argument.type, OptionalType):
+            # Handle optionals.
+            num_expr = f"({b.name}.has_value() ? 1 : 0)"
+            num_exprs.append(num_expr)
+            conditional = f"if({b.name}.has_value())"
+            getter = (
+                f"{conditional} {state_vec}.insert({state_vec}.end(), *({b.name}));"
+            )
+            setter = f"{conditional} {b.name} = {state_vec}[i];"
+        else:
+            num_expr = "1"
+            num_exprs.append(num_expr)
+            getter = f"{state_vec}.push_back({b.name});"
+            setter = f"{b.name} = {state_vec}[i];"
+
+        getter_logic.append(getter)
+        setter_logic.append(setter)
+        if i < len(bindings) - 1:
+            setter_logic.append(f"i += {num_expr};")
+
+    # Reserve / assert based on the total number of items expression.
+    num_items = "0" if len(num_exprs) == 0 else " + ".join(num_exprs)
+    if len(bindings) > 0:
+        getter_logic.insert(1, f"{state_vec}.reserve({num_items});")
+
+    getter_logic.append(f"return {state_vec};")
+
+    return getter_logic, setter_logic, num_items
+
+
+def process_function(fn: NativeFunction, template: CodeTemplate) -> str:
+    bindings = extract_bindings(fn)
+    non_self_bindings = [b for b in bindings if b.name != "self"]
+
+    non_self_args = fn.func.arguments.flat_all[1:]
+    non_self_value_bindings = [
+        dispatcher.argument(a, remove_non_owning_ref_types=True) for a in non_self_args
+    ]
+
+    # Generate constructor / clone args for the generated struct.
+    constructor_args = [b.defn() for b in non_self_bindings]
+    clone_args = [b.name for b in non_self_bindings]
+
+    # Generate state variable declarations for the generated struct.
+    state_variables = [
+        f"{remove_const_ref(b).defn()};" for b in non_self_value_bindings
+    ]
+
+    # Generate initializer list expressions for the generated struct.
+    # allow_expensive_conversions=True because we need to store e.g. SymIntArrayRefs as
+    # vector<SymInt>s.
+    init_exprs = translate(
+        non_self_bindings, non_self_value_bindings, allow_expensive_conversions=True
+    )
+    initializers = []
+    for b, init_expr in zip(non_self_bindings, init_exprs):
+        name = b.nctype.name
+        assert isinstance(name, str)
+        initializers.append(f"{name}({init_expr.expr})")
+
+    # Generate call to underlying view op
+    call_input_name = "input_base"
+    op_call_args = [call_input_name, *(b.name for b in non_self_bindings)]
+    op_call = CALL_DISPATCH.substitute(
+        unambiguous_name=fn.func.name.unambiguous_name(),
+        unpacked_args=op_call_args,
+    )
+
+    # Multi-output views additionally require a view_idx for disambiguation.
+    if returns_multi_tensor(fn):
+        view_idx_name = "view_idx"
+        view_idx_typename = "int64_t"
+        view_idx_decl = f"{view_idx_typename} {view_idx_name}"
+        constructor_args.append(view_idx_decl)
+        clone_args.append(view_idx_name)
+        state_variables.append(f"{view_idx_decl};")
+        initializers.append(f"{view_idx_name}({view_idx_name})")
+        op_call += f"[{view_idx_name}]"
+
+    # Generate initializer list for the generated struct.
+    initializer_list = f": {', '.join(initializers)}" if len(initializers) > 0 else ""
+
+    # Generate getter / setter logic for any symints.
+    symint_bindings = [
+        b
+        for b in non_self_bindings
+        if isinstance(b.argument, Argument) and b.argument.type.is_symint_like()
+    ]
+    symints_vec_type = NamedCType("symints", VectorCType(BaseCType(SymIntT)))
+    get_symints, set_symints, num_symints = generate_state_getter_setter(
+        symint_bindings, symints_vec_type
+    )
+
+    # Generate getter / setter logic for any tensors.
+    tensor_bindings = [
+        b
+        for b in non_self_bindings
+        if isinstance(b.argument, Argument) and b.argument.type.is_tensor_like()
+    ]
+    tensors_vec_type = NamedCType("tensors", VectorCType(BaseCType(tensorT)))
+    get_tensors, set_tensors, num_tensors = generate_state_getter_setter(
+        tensor_bindings, tensors_vec_type
+    )
+
+    return template.substitute(
+        op=view_func_name(fn),
+        uppercase_op=view_func_name(fn, camel_case=False).upper(),
+        superclass="torch::autograd::ViewFunc",
+        initializer_list=initializer_list,
+        state=state_variables,
+        constructor_args=constructor_args,
+        clone_args=clone_args,
+        symints_vec=symints_vec_type.name,
+        get_symints=get_symints,
+        set_symints=set_symints,
+        num_symints=num_symints,
+        tensors_vec=tensors_vec_type.name,
+        get_tensors=get_tensors,
+        set_tensors=set_tensors,
+        num_tensors=num_tensors,
+        call_input_name=call_input_name,
+        op_call=op_call,
+    )
+
+
+def gen_view_funcs(
+    out: str,
+    fns_with_infos: list[NativeFunctionWithDifferentiabilityInfo],
+    template_path: str,
+) -> None:
+    # don't need the info parts, just the function
+    fns = [fn.func for fn in fns_with_infos if use_derived(fn)]
+    # only want out-of-place views
+    view_fns = [
+        fn for fn in fns if get_view_info(fn) is not None and not modifies_arguments(fn)
+    ]
+
+    declarations = [process_function(fn, FUNCTION_DECLARATION) for fn in view_fns]
+    definitions = [process_function(fn, FUNCTION_DEFINITION) for fn in view_fns]
+    ops_headers = [f"#include <ATen/ops/{fn.root_name}_ops.h>" for fn in view_fns]
+
+    file_basename = "ViewFuncs"
+    fm = FileManager(install_dir=out, template_dir=template_path, dry_run=False)
+    for suffix in [".h", ".cpp"]:
+        fname = file_basename + suffix
+        fm.write_with_template(
+            fname,
+            fname,
+            lambda: {
+                "generated_comment": "@"
+                + f"generated from {fm.template_dir_for_comments()}/"
+                + fname,
+                "view_func_declarations": declarations,
+                "view_func_definitions": definitions,
+                "ops_headers": ops_headers,
+            },
+        )

minigpt2/lib/python3.10/site-packages/torchgen/packaged/autograd/load_derivatives.py

@@ -0,0 +1,1014 @@
+# Parses derivatives.yaml into autograd functions
+#
+# Each autograd function is represented by `DifferentiabilityInfo` containing
+# a list of `Derivative`. See `torchgen.api.autograd` for the data models.
+
+from __future__ import annotations
+
+import re
+from collections import defaultdict
+from typing import Any, Counter, Dict, Sequence, Set, Tuple
+
+import yaml
+
+from torchgen.api import cpp
+from torchgen.api.autograd import (
+    Derivative,
+    DifferentiabilityInfo,
+    ForwardDerivative,
+    SavedAttribute,
+)
+from torchgen.api.types import (
+    BaseCType,
+    Binding,
+    boolT,
+    CppSignatureGroup,
+    layoutT,
+    longT,
+    NamedCType,
+    OptionalCType,
+    scalarTypeT,
+    SpecialArgName,
+    stringT,
+    symIntArrayRefT,
+    SymIntT,
+    tensorGeometryT,
+    tensorOptionsT,
+    typeAndSizeT,
+    VectorCType,
+)
+from torchgen.context import with_native_function
+from torchgen.gen import get_grouped_by_view_native_functions, parse_native_yaml
+from torchgen.model import (
+    AUTOGRAD_KEYS,
+    FunctionSchema,
+    NativeFunction,
+    NativeFunctionsViewGroup,
+    OperatorName,
+    SchemaKind,
+    Type,
+    Variant,
+)
+from torchgen.utils import concatMap, IDENT_REGEX, split_name_params
+from torchgen.yaml_utils import YamlLoader
+
+
+DerivativeRet = Tuple[Dict[FunctionSchema, Dict[str, DifferentiabilityInfo]], Set[str]]
+
+_GLOBAL_LOAD_DERIVATIVE_CACHE: dict[tuple[str, str], DerivativeRet] = {}
+
+_VALID_AUTOGRAD_KEYS = set(AUTOGRAD_KEYS)
+
+
+# This function directly adds per-dispatchkey derivative entries for {view}_copy variants of each view op.
+# Since every {view} and {view}_copy op shares the same derivative formula,
+# we generate them here instead of duplicating them in the yaml.
+# See Note [Codegen'd {view}_copy Operators]
+def add_view_copy_derivatives(
+    infos: dict[FunctionSchema, dict[str, DifferentiabilityInfo]],
+    view_groups: list[NativeFunctionsViewGroup],
+) -> None:
+    # Get the map from each view op's name to its corresponding view group
+    view_name_to_group: dict[OperatorName, NativeFunctionsViewGroup] = {
+        g.view.func.name: g for g in view_groups
+    }
+
+    view_infos = {}
+
+    for info_dispatch_dict in infos.values():
+        # maybe_view_group only needs to be calculated once per info_dispatch_dict
+        maybe_view_group = None
+        view_copy_differentiability_infos = {}
+        for dispatch_key, info in info_dispatch_dict.items():
+            maybe_view_group = view_name_to_group.get(info.func.func.name, None)
+            if maybe_view_group is not None and maybe_view_group.view_copy is not None:
+                view_copy_info = info.create_view_copy_from_view_derivative(
+                    maybe_view_group
+                )
+                if view_copy_info is not None:
+                    fn_schema = view_copy_info.func.func
+                    view_copy_differentiability_infos[dispatch_key] = view_copy_info
+            else:
+                break
+        # prefer manually-defined derivatives if any
+        if len(view_copy_differentiability_infos) > 0 and fn_schema not in infos:
+            assert fn_schema is not None
+            view_infos[fn_schema] = view_copy_differentiability_infos
+
+    infos.update(view_infos)
+
+
+def load_derivatives(
+    derivatives_yaml_path: str, native_yaml_path: str, tags_yaml_path: str
+) -> DerivativeRet:
+    # Do some caching as this is a deterministic function
+    global _GLOBAL_LOAD_DERIVATIVE_CACHE
+    key = (derivatives_yaml_path, native_yaml_path)
+    if key not in _GLOBAL_LOAD_DERIVATIVE_CACHE:
+        with open(derivatives_yaml_path) as f:
+            definitions = yaml.load(f, Loader=YamlLoader)
+
+        funcs = parse_native_yaml(native_yaml_path, tags_yaml_path).native_functions
+        # From the parsed native functions, separate out the (generated) view_copy functions,
+        # so we can generate derivatives for them separately.
+        native_functions_with_view_groups = get_grouped_by_view_native_functions(funcs)
+        native_functions = concatMap(
+            lambda g: [g]
+            if isinstance(g, NativeFunction)
+            else list(g.functions(include_copy=True)),
+            native_functions_with_view_groups,
+        )
+        view_groups = [
+            g
+            for g in native_functions_with_view_groups
+            if isinstance(g, NativeFunctionsViewGroup)
+        ]
+
+        # What's the difference between function schema v.s. signature?
+        # function schema is the complete declaration including mutability annotation / default value and etc.
+        # signature is the canonical schema for a group of functions (in-place/out/functional variants)
+        # that are semantically related.
+        functions_by_signature: dict[
+            FunctionSchema, list[NativeFunction]
+        ] = defaultdict(list)
+        functions_by_schema: dict[str, NativeFunction] = {}
+        for function in native_functions:
+            functions_by_signature[function.func.signature()].append(function)
+            assert str(function.func) not in functions_by_schema
+            functions_by_schema[str(function.func)] = function
+
+        # Keep track of how many of which ops we've seen so we can
+        # disambiguate them with a numeric suffix.
+        op_counter = Counter[str]()
+
+        # infos is a dict that maps FunctionSchema -> a dict of per dispatch key DifferentiabilityInfos
+        # this is useful because in tools/autograd/gen_autograd.py:match_differentiability_info
+        # we ultimately need to categorize the DifferentiabilityInfos by FunctionSchema
+        infos: dict[FunctionSchema, dict[str, DifferentiabilityInfo]] = {}
+        used_dispatch_keys: set[str] = set()
+        for defn_dict in definitions:
+            # Ensure that the old derivatives.yaml schema with no dispatch key can be loaded.
+            if "dispatch" not in defn_dict:
+                specification = defn_dict.pop("name")
+                output_differentiability = defn_dict.pop(
+                    "output_differentiability", None
+                )
+                defn_dict = {"name": specification, "dispatch": {"Default": defn_dict}}
+                if output_differentiability:
+                    defn_dict["output_differentiability"] = output_differentiability
+            name, per_dispatch_diffinfos = create_differentiability_info(
+                defn_dict,
+                functions_by_signature,
+                functions_by_schema,
+                op_counter,
+                used_dispatch_keys,
+            )
+            infos[name] = per_dispatch_diffinfos
+
+        add_view_copy_derivatives(infos, view_groups)
+
+        # cache both loaded infos as well a a set of all the dispatch_keys/aliases
+        # that appear in derivatives.yaml. used_dispatch_keys is useful for generating
+        # VariableType.cpp where we need a TORCH_LIBRARY_IMPL for every autograd dispatch key used
+        _GLOBAL_LOAD_DERIVATIVE_CACHE[key] = infos, used_dispatch_keys
+
+    return _GLOBAL_LOAD_DERIVATIVE_CACHE[key]
+
+
+# TODO: Why is this going through CppSignatureGroup, that doesn't make sense...
+@with_native_function
+def cpp_arguments(f: NativeFunction) -> Sequence[Binding]:
+    sigs = CppSignatureGroup.from_native_function(f, method=False)
+    if sigs.symint_signature is not None:
+        return sigs.symint_signature.arguments()
+    else:
+        return sigs.signature.arguments()
+
+
+def create_derivative(
+    f: NativeFunction,
+    formula: str,
+    var_names: tuple[str, ...],
+    available_named_gradients: Sequence[str],
+) -> Derivative:
+    original_formula = formula
+    arguments: list[NamedCType] = [
+        a.nctype.remove_const_ref() for a in cpp_arguments(f)
+    ]
+
+    return_names = tuple(n if n != "self" else "result" for n in cpp.return_names(f))
+    return_types = tuple(
+        cpp.return_type(r, symint=True).remove_const_ref() for r in f.func.returns
+    )
+
+    named_returns = [
+        NamedCType(name, type) for name, type in zip(return_names, return_types)
+    ]
+
+    formula, saved_inputs = saved_variables(formula, arguments, var_names)
+    formula, saved_outputs = saved_variables(formula, named_returns, var_names)
+
+    used_named_gradients = {
+        name
+        for name in available_named_gradients
+        if re.search(IDENT_REGEX.format(name), formula)
+    }
+
+    # Check that the referenced derivatives in the formula are in bounds
+    for i in used_gradient_indices(formula):
+        if i >= len(f.func.returns):
+            raise RuntimeError(
+                f"Out of bounds grads access: derivative formula for {cpp.name(f.func)} "
+                f"used grads[{i}], but the forward only returns {len(f.func.returns)} outputs."
+            )
+
+    return Derivative(
+        formula=formula,
+        original_formula=original_formula,
+        var_names=var_names,
+        saved_inputs=saved_inputs,
+        saved_outputs=saved_outputs,
+        named_gradients=used_named_gradients,
+    )
+
+
+def create_forward_derivative(
+    f: NativeFunction, formula: str, names: tuple[str, ...]
+) -> ForwardDerivative:
+    var_names = names
+    var_types: tuple[Type, ...] | None = None
+    for r in f.func.returns:
+        if r.name in var_names:
+            if var_types is None:
+                var_types = ()
+            var_types = var_types + (r.type,)
+
+    # Handle default return names
+    if var_types is None:
+        if var_names == ("result",):
+            assert len(f.func.returns) == 1
+            var_types = (f.func.returns[0].type,)
+        else:
+            for var_name in var_names:
+                res = re.findall(r"^result(\d+)$", var_name)
+                if len(res) == 1:
+                    if var_types is None:
+                        var_types = ()
+                    arg_idx = int(res[0])
+                    var_types = var_types + (f.func.returns[arg_idx].type,)
+
+    assert var_types is not None, "No matching output for forward derivative definition"
+    return ForwardDerivative(
+        formula=formula,
+        var_names=var_names,
+        var_types=var_types,
+        required_inputs_fw_grad=None,
+        required_inputs_primal=None,
+        required_original_self_value=False,
+        is_reusing_outplace_formula=False,
+    )
+
+
+def postprocess_forward_derivatives(
+    f: NativeFunction,
+    defn_name: str,
+    all_arg_names: list[str],
+    derivatives: list[Derivative],
+    forward_derivatives: list[ForwardDerivative],
+    args_with_derivatives: Sequence[Binding],
+) -> list[ForwardDerivative]:
+    def find_required_inputs(formula: str, postfix: str) -> tuple[str, ...]:
+        is_foreach = f.func.name.name.base.startswith("_foreach_")
+        required_inputs = set()
+        for arg in args_with_derivatives:
+            if (
+                arg.type in ("at::TensorList", "const at::ITensorListRef &")
+                and not is_foreach
+            ):
+                # The functions taking TensorList handle everything internally
+                continue
+            arg_name = arg.name
+
+            found = re.search(IDENT_REGEX.format(arg_name), formula)
+            if found:
+                raise RuntimeError(
+                    f"The forward formula for {defn_name} is using the base name of the {arg_name} "
+                    f"argument which is ambiguous. You should use {arg_name}_p to access the primal "
+                    f"value and {arg_name}_t to access the tangent."
+                )
+
+            found = re.search(IDENT_REGEX.format(arg_name + postfix), formula)
+            if found:
+                required_inputs.add(arg_name)
+
+        return tuple(required_inputs)
+
+    updated_derivatives: list[ForwardDerivative] = []
+
+    for defn in forward_derivatives:
+        formula = defn.formula
+        required_inputs_tangent = find_required_inputs(formula, "_t")
+        if formula == "auto_element_wise":
+            assert (
+                f.func.kind() != SchemaKind.inplace
+            ), f"Cannot use auto_element_wise with {f.func.name} because it is an in-place variant"
+            if (
+                (not len(args_with_derivatives) == 1)
+                or len(forward_derivatives) > 1
+                or len(forward_derivatives[0].var_names) > 1
+            ):
+                raise RuntimeError(
+                    f"Derivative definition of {defn_name} in derivatives.yaml defines the "
+                    "forward definition of gradient as element_wise but this only "
+                    "works for functions with a single differentiable input and a "
+                    "single differentiable output."
+                )
+            if not len(derivatives) == 1:
+                raise RuntimeError(
+                    f"Derivative definition of {defn_name} in derivatives.yaml defines the "
+                    "forward definition of gradient as element_wise but it does not "
+                    "defines the gradient formula for its argument which is required."
+                )
+            # This transformation is based on the observation that for element-wise functions, the Jacobian
+            # matrix is diagonal and thus doing J * v is the same as (v^T J)^T (in practice, we ignore the transpositions)
+            # For the complex case, we use hermitian transpose and get (v.conj() J).conj()
+            # So here we are going to re-use the backward formula and replace two things:
+            # 1) all occurrences of "grad" with "foo_t.conj()", where foo is the name of the unique differentiable input.
+            # 2) all usage of an original input "foo" with its primal value "foo_p".
+            # 3) conjugate the final result
+            # For example, for abs, the backward formula is:
+            #   grad * self.sgn()
+            # And this function generates a forward formula that is:
+            #   (self_t.conj() * self_p.sgn()).conj()
+
+            backward_formula = derivatives[0].original_formula
+            input_name = args_with_derivatives[0].name
+
+            # Do replacement 1) of the grad
+            def repl(m: Any) -> str:
+                return f"{m.group(1)}{input_name}_t.conj(){m.group(2)}"
+
+            fw_formula = re.sub(IDENT_REGEX.format("grad"), repl, backward_formula)
+
+            # Do replacement 2) of the input variables
+            for arg in args_with_derivatives:
+                arg_name = arg.name
+
+                def repl(m: Any) -> str:
+                    return f"{m.group(1)}{arg_name}_p{m.group(2)}"
+
+                fw_formula = re.sub(IDENT_REGEX.format(arg_name), repl, fw_formula)
+
+            # Do the final conjugate 3)
+            fw_formula = f"({fw_formula}).conj()"
+
+            # Since there is a single differentiable inputs and we necessarily need its tangent we can
+            # simply require all differentiable input's tangent.
+            required_inputs_tangent = tuple(all_arg_names)
+            formula = fw_formula
+        elif formula == "auto_linear":
+            if (
+                len(forward_derivatives) > 1
+                or len(forward_derivatives[0].var_names) > 1
+            ):
+                raise RuntimeError(
+                    f"Derivative definition of {defn_name} in derivatives.yaml defines the "
+                    "forward definition of gradient as linear but this only works "
+                    "for functions with a single differentiable output."
+                )
+            # This transformation is based on the observation that linear functions can be written as:
+            #   y = f(x) = A * x
+            # For some matrix A and the Jacobian of the function f is also A.
+            # So doing J * v = A * v = f(v).
+            # Hence to do the jvp, we simply need to evaluate the function at the point v instead of x.
+            # We do this by calling the forward again by replacing any occurrence of the differentiable
+            # input "foo" by it's tangent "foo_t".
+            # Note that multiple inputs are not a problem as long as the function is truly linear wrt to
+            # the vector where all the differentiable inputs are stacked.
+
+            diff_arg_names = [arg.name for arg in args_with_derivatives]
+            assert len(diff_arg_names) > 0
+
+            # Do replacement of input variables
+            new_args = []
+            for arg_name in all_arg_names:
+                if arg_name in diff_arg_names:
+                    arg_name = arg_name + "_t"
+                new_args.append(arg_name)
+
+            # TODO we are trolling
+            if f.func.has_symint():
+                defn_name += "_symint"
+
+            # Call into the forward again. We need two cases here to handle both Tensor methods and at:: functions.
+            if Variant.function in f.variants:
+                fw_formula = f"at::{defn_name}({', '.join(new_args)})"
+            else:
+                assert Variant.method in f.variants
+                fw_formula = f"{new_args[0]}.{defn_name}({', '.join(new_args[1:])})"
+
+            # All of the input tangents are always used so all of them are required here.
+            required_inputs_tangent = tuple(diff_arg_names)
+            formula = fw_formula
+
+        # At this point, the formula is final and is not modified anymore.
+
+        # During forward formula, we use the primal instead of the input Tensors.
+        # This call inspects the formula to find for which input's primal are used.
+        required_inputs_primal = find_required_inputs(formula, "_p")
+
+        updated_derivatives.append(
+            ForwardDerivative(
+                formula=formula,
+                var_names=defn.var_names,
+                var_types=defn.var_types,
+                required_inputs_fw_grad=required_inputs_tangent,
+                required_inputs_primal=required_inputs_primal,
+                required_original_self_value=False,
+                is_reusing_outplace_formula=False,
+            )
+        )
+
+    return updated_derivatives
+
+
+def is_forward_derivative_definition(
+    all_arg_names: list[str], names: tuple[str, ...]
+) -> bool:
+    for name in names:
+        return name not in all_arg_names
+    raise RuntimeError("Expected `names` to be non-empty")
+
+
+def create_differentiability_info(
+    defn_dict: dict[Any, Any],
+    functions_by_signature: dict[FunctionSchema, list[NativeFunction]],
+    functions_by_schema: dict[str, NativeFunction],
+    op_counter: Counter[str],
+    used_dispatch_keys: set[str],
+) -> tuple[FunctionSchema, dict[str, DifferentiabilityInfo]]:
+    """Processes a single entry `defn` in derivatives.yaml"""
+
+    def canonical_function(
+        functions: Sequence[NativeFunction], name: str
+    ) -> NativeFunction:
+        for f in functions:
+            if (
+                not f.func.is_functional_fn()
+                and not f.func.is_out_fn()
+                and name == str(f.func.name.name)
+            ):
+                return f
+        # some functions only have in-place variants
+        assert name + "_" == cpp.name(functions[0].func)
+        return functions[0]
+
+    def split_names(raw_names: str) -> tuple[str, ...]:
+        """Given "foo, bar", return ["foo", "bar"]."""
+        return tuple(x.strip() for x in raw_names.split(","))
+
+    def check_grad_usage(defn_name: str, derivatives: Sequence[Derivative]) -> None:
+        """
+        Check for some subtle mistakes one might make when writing derivatives.
+        These mistakes will compile, but will be latent until a function is
+        used with double backwards.
+        """
+
+        uses_grad = False  # true if any derivative uses "grad"
+        num_grads_uses = 0  # count of uses of "grads" or "grads[INDEX]"
+        uses_named_grads = False  # true if any derivative uses "grad_{name}"
+        used_grads_indices: list[int] = []  # which indices of grads are used
+        for d in derivatives:
+            formula = d.formula
+            uses_grad = uses_grad or bool(
+                re.findall(IDENT_REGEX.format("grad"), formula)
+            )
+            num_grads_uses += len(re.findall(IDENT_REGEX.format("grads"), formula))
+            uses_named_grads = uses_named_grads or bool(d.named_gradients)
+            used_grads_indices.extend(used_gradient_indices(formula))
+        # This is a basic sanity check: the number of places we see
+        # "grads" should be no fewer than the number of indices we see
+        # inside "grads". They may not be equal because we may use
+        # "grads" without an index.
+        assert num_grads_uses >= len(used_grads_indices)
+        # Thus if the number is equal, every use of grads is also
+        # indexed.
+        only_used_grads_indices = num_grads_uses == len(used_grads_indices)
+
+        if uses_grad and num_grads_uses > 0:
+            raise RuntimeError(
+                f"Derivative definition of {defn_name} in derivatives.yaml illegally "
+                "mixes use of 'grad' and 'grads'. Consider replacing "
+                "occurrences of 'grad' with 'grads[0]'"
+            )
+
+        if only_used_grads_indices and set(used_grads_indices) == {0}:
+            raise RuntimeError(
+                f"Derivative definition of {defn_name} in derivatives.yaml solely "
+                "refers to 'grads[0]'.  If the first output is indeed the "
+                "only differentiable output, replace 'grads[0]' with 'grad'; "
+                "otherwise, there is a likely error in your derivatives "
+                "declaration."
+            )
+
+        if uses_named_grads and (uses_grad or num_grads_uses > 0):
+            raise RuntimeError(
+                f"Derivative definition of {defn_name} in derivatives.yaml illegally "
+                'mixes use of "grad_RETURN_NAME" and "grad" or "grads[x]". Use '
+                "only one method for identifying gradients."
+            )
+
+    @with_native_function
+    def set_up_derivatives(
+        f: NativeFunction,
+    ) -> tuple[
+        Sequence[Derivative],
+        Sequence[ForwardDerivative],
+        Sequence[Binding],
+        Sequence[str],
+        Sequence[str],
+    ]:
+        # Set up the derivative information
+        derivatives: list[Derivative] = []
+        forward_derivatives: list[ForwardDerivative] = []
+        non_differentiable_arg_names: list[str] = []
+        args_with_derivatives_set: set[str] = set()
+
+        all_arg_names = [a.name for a in cpp_arguments(f)]
+        all_ret_names = [
+            r.name for r in f.func.returns
+        ]  # only used for the assert below
+        # output_differentiability is captured from the enclosed
+        # scope. Don't modify it.
+        #
+        # If it is not present, then no output is explicitly
+        # undifferentiable.
+        #
+        # It may be present and shorter than the length of return
+        # values. If that's the case, any return value that does not
+        # have a corresponding entry is considered not differentiable.
+        differentiability = output_differentiability or [True] * len(f.func.returns)
+        # A return is available as a named gradient ...
+        available_named_gradients = [
+            f"grad_{ret.name}"
+            for ret, differentiable in zip(f.func.returns, differentiability)
+            # if it has not been explicitly made undifferentiable
+            if differentiable
+            # and if it has a name
+            and ret.name is not None
+            # and if its type is differentiable
+            and ret.type.is_tensor_like()
+        ]
+
+        for raw_names in sorted(defn.keys()):
+            formula = defn[raw_names]
+            names = split_names(raw_names)
+
+            for name in names:
+                assert not (name in all_arg_names and name in all_ret_names), (
+                    f"While processing the derivative formula for '{f.func.name}' wrt '{name}', "
+                    f"expected '{name}' to not be both an input arg and named return. "
+                )
+
+            if is_forward_derivative_definition(all_arg_names, names):
+                forward_derivatives.append(create_forward_derivative(f, formula, names))
+            else:
+                if formula.lower().strip() == "non_differentiable":
+                    non_differentiable_arg_names += names
+                else:
+                    derivative = create_derivative(
+                        f, formula, names, available_named_gradients
+                    )
+                    derivatives.append(derivative)
+                    args_with_derivatives_set |= set(names)
+
+        overlap = args_with_derivatives_set.intersection(non_differentiable_arg_names)
+        if overlap:
+            raise RuntimeError(
+                f"derivatives definition for {defn} have overlapped non_differentiable "
+                f"and differentiable variables: {overlap}"
+            )
+
+        # Next, let us determine the list of inputs in order.
+        # TODO: do we need eagerly calculate and save it here? Can it be derived
+        # from NativeFunction and `derivatives` on callsites instead?
+        args_with_derivatives = [
+            a for a in cpp_arguments(f) if a.name in args_with_derivatives_set
+        ]
+
+        # Postprocess forward derivatives definitions now that we know the differentiable arguments
+        forward_derivatives = postprocess_forward_derivatives(
+            f,
+            defn_name,
+            all_arg_names,
+            derivatives,
+            forward_derivatives,
+            args_with_derivatives,
+        )
+
+        # Test to see if the use of 'grads' makes sense.
+        check_grad_usage(defn_name, derivatives)
+
+        return (
+            derivatives,
+            forward_derivatives,
+            args_with_derivatives,
+            non_differentiable_arg_names,
+            available_named_gradients,
+        )
+
+    # NB: Removes 'name' from defn dictionary
+    specification = defn_dict.pop("name")
+    defn_name, _ = split_name_params(specification)
+    # NB: Removes 'output_differentiability' from defn dictionary
+    #     `None` means all differentiable.
+    output_differentiability = defn_dict.pop("output_differentiability", None)
+    output_differentiability_conditions = None
+    if output_differentiability and any(
+        isinstance(diff, str) for diff in output_differentiability
+    ):
+        if len(output_differentiability) != 1:
+            raise RuntimeError(
+                f"Not supported: for {specification},"
+                f"output_differentiability must either be "
+                f"List[bool] or a List[str] where each str is a "
+                f"condition. In the case where it is a condition, "
+                f"we only support single-output functions. "
+                f"Please file us an issue. "
+            )
+        output_differentiability_conditions = output_differentiability
+        output_differentiability = [True]
+
+    schema_function = functions_by_schema.get(specification)
+    if not schema_function:
+        avail = "\n".join(
+            k for k, v in functions_by_schema.items() if cpp.name(v.func) == defn_name
+        )
+        raise RuntimeError(
+            f"could not find ATen function for schema: {specification} "
+            f".  Available signatures:\n{avail}"
+        )
+
+    # now map this to the legacy schema; this isn't technically necessary, but we'd need some logic here
+    # to map in-place schemas to the out-of-place variants.
+    # TODO: maybe the logic to handle the legacy schema is no longer necessary?
+    signature = schema_function.func.signature()
+    functions = functions_by_signature[signature]
+    if len(functions) == 0:
+        avail = "\n".join(
+            str(k)
+            for k, v in functions_by_signature.items()
+            if cpp.name(k) == defn_name
+        )
+        raise RuntimeError(
+            f"could not find ATen function for legacy signature: {signature} "
+            f"corresponding to schema {specification}.  Please report a bug to PyTorch. "
+            f"Available signatures:\n{avail}"
+        )
+
+    canonical = canonical_function(functions, defn_name)
+    if "grad_input_mask" in (a.name for a in cpp_arguments(canonical)):
+        raise RuntimeError(
+            f"Schema for {defn_name} has an argument named grad_input_mask, "
+            "but this name would be shadowed by our codegen. "
+            "Please use a different name in native_functions.yaml."
+        )
+
+    if "result" in (a.name for a in cpp_arguments(canonical)):
+        raise RuntimeError(
+            f"Schema for {defn_name} has an argument named result, "
+            "but this is only allowed for outputs."
+            "Please use a different name in native_functions.yaml."
+        )
+
+    diffinfo_dict = {}
+    for key, defn in defn_dict["dispatch"].items():
+        if key != "Default" and key not in _VALID_AUTOGRAD_KEYS:
+            raise RuntimeError(
+                f"Invalid dispatch key {key} in derivatives.yaml for {specification},"
+                f" expected key to be one of {_VALID_AUTOGRAD_KEYS}"
+            )
+        if key not in used_dispatch_keys:
+            used_dispatch_keys.add(key)
+
+        (
+            derivatives,
+            forward_derivatives,
+            args_with_derivatives,
+            non_differentiable_arg_names,
+            available_named_gradients,
+        ) = set_up_derivatives(canonical)
+
+        used_named_gradients: set[str] = set()
+        for d in derivatives:
+            used_named_gradients |= d.named_gradients
+
+        # only assign an op name if we are actually going to calculate a derivative
+        op = None
+        if args_with_derivatives:
+            op_prefix = _create_op_prefix(defn_name)
+            if key != "Default":
+                op_prefix = op_prefix + key
+            op = f"{op_prefix}{op_counter[op_prefix]}"
+            op_counter[op_prefix] += 1
+
+        diffinfo_dict[key] = DifferentiabilityInfo(
+            name=defn_name,
+            func=canonical,
+            op=op,
+            derivatives=derivatives,
+            forward_derivatives=forward_derivatives,
+            all_saved_inputs=dedup_vars(
+                [v for d in derivatives for v in d.saved_inputs]
+            ),
+            all_saved_outputs=dedup_vars(
+                [v for d in derivatives for v in d.saved_outputs]
+            ),
+            available_named_gradients=available_named_gradients,
+            used_named_gradients=used_named_gradients,
+            args_with_derivatives=args_with_derivatives,
+            non_differentiable_arg_names=non_differentiable_arg_names,
+            output_differentiability=output_differentiability,
+            output_differentiability_conditions=output_differentiability_conditions,
+        )
+
+    return canonical.func, diffinfo_dict
+
+
+GRAD_INDEX_REGEX = r"(?:^|\W)grads\[(\d+)\]"
+
+
+def used_gradient_indices(formula: str) -> list[int]:
+    """Determine a list of gradient indices (the i in grads[i]) that
+    are used by the formula.
+
+    >>> used_gradient_indices("foo(grads[0], grads[1])")
+    [0, 1]
+    """
+    return [int(i) for i in re.findall(GRAD_INDEX_REGEX, formula)]
+
+
+def saved_variables(
+    formula: str,
+    nctypes: list[NamedCType],
+    var_names: tuple[str, ...],
+) -> tuple[str, tuple[SavedAttribute, ...]]:
+    def stride_expr(name: str) -> str:
+        assert var_names == (name,), (
+            'Replacement for ".strides()" is currently only supported for single derivatives of the same tensor '
+            'that ".strides()" is being called on.'
+        )
+        return f'strides_or_error({name}, "{name}")'
+
+    REPLACEMENTS: list[tuple[str, dict[str, Any]]] = [
+        # replace self.sym_sizes() with self_sym_sizes
+        (
+            r"{}.sym_sizes\(\)",
+            {
+                "suffix": "_sym_sizes",
+                "nctype": lambda name: NamedCType(name, BaseCType(symIntArrayRefT)),
+            },
+        ),
+        # replace self->sym_sizes() with self_sym_sizes_opt
+        (
+            r"{}->sym_sizes\(\)",
+            {
+                "suffix": "_sym_sizes_opt",
+                "nctype": lambda name: NamedCType(
+                    name, OptionalCType(BaseCType(symIntArrayRefT))
+                ),
+                "expr": lambda name: f"{name}.has_value() ? std::optional<c10::SymIntArrayRef>({name}->sym_sizes()) : std::nullopt",
+            },
+        ),
+        # replace self.sym_blocksize() with self_sym_blocksize_opt
+        (
+            r"{}.sym_blocksize\(\)",
+            {
+                "suffix": "_self_sym_blocksize_opt",
+                "nctype": lambda name: NamedCType(
+                    name, OptionalCType(BaseCType(symIntArrayRefT))
+                ),
+                "expr": lambda name: f"at::sparse_csr::getSymIntBlockSize({name})",
+            },
+        ),
+        # replace self.options() with self_options
+        (
+            r"{}.options\(\)",
+            {
+                "suffix": "_options",
+                "nctype": lambda name: NamedCType(name, BaseCType(tensorOptionsT)),
+            },
+        ),
+        # replace zeros_like(self) with self_info
+        (
+            r"zeros_like\({}\)",
+            {
+                "suffix": "_info",
+                "nctype": lambda name: NamedCType(name, BaseCType(typeAndSizeT)),
+                "expr": lambda name: name,  # at save-time
+                "res": lambda name: name + "_info.zeros()",  # at eval-time
+            },
+        ),
+        # replace self.sym_size(2) with self_sym_size_2
+        (
+            r"{}.sym_size\((-?\w+)\)",
+            {
+                "suffix": lambda m: f"_sym_argsize_{m.groups()[0].replace('-', 'minus_')}",
+                "nctype": lambda name: NamedCType(name, BaseCType(SymIntT)),
+            },
+        ),
+        # replace self.numel() with self_numel
+        (
+            r"{}.numel\(\)",
+            {
+                "suffix": "_numel",
+                "nctype": lambda name: NamedCType(name, BaseCType(longT)),
+            },
+        ),
+        # replace self.sym_numel() with self_sym_numel
+        (
+            r"{}.sym_numel\(\)",
+            {
+                "suffix": "_sym_numel",
+                "nctype": lambda name: NamedCType(name, BaseCType(SymIntT)),
+            },
+        ),
+        # replace to_args_sizes(self) with self_args_sizes
+        (
+            r"to_args_sizes\({}\)",
+            {
+                "suffix": "_args_sizes",
+                "nctype": lambda name: NamedCType(
+                    name, VectorCType(VectorCType(BaseCType(longT)))
+                ),
+            },
+        ),
+        # replace to_args_sizes_symint(self) with self_args_sizes
+        (
+            r"to_args_sizes_symint\({}\)",
+            {
+                "suffix": "_args_sizes_symint",
+                "nctype": lambda name: NamedCType(
+                    name, VectorCType(VectorCType(BaseCType(SymIntT)))
+                ),
+            },
+        ),
+        # replace to_args_scalartypes(self) with self_args_scalartypes
+        (
+            r"to_args_scalartypes\({}\)",
+            {
+                "suffix": "_args_scalartypes",
+                "nctype": lambda name: NamedCType(
+                    name, VectorCType(BaseCType(scalarTypeT))
+                ),
+            },
+        ),
+        # replace TensorGeometry(self) with self_geometry
+        (
+            r"TensorGeometry\({}\)",
+            {
+                "suffix": "_geometry",
+                "nctype": lambda name: NamedCType(name, BaseCType(tensorGeometryT)),
+            },
+        ),
+        (
+            r"{}.scalar_type\(\)",
+            {
+                "suffix": "_scalar_type",
+                "nctype": lambda name: NamedCType(name, BaseCType(scalarTypeT)),
+            },
+        ),
+        # replace self.dim() with self_dim
+        (
+            r"{}.dim\(\)",
+            {
+                "suffix": "_dim",
+                "nctype": lambda name: NamedCType(name, BaseCType(longT)),
+            },
+        ),
+        # replace self.sym_strides() with self_sym_strides
+        (
+            r"{}.sym_strides\(\)",
+            {
+                "suffix": "_sym_strides",
+                "nctype": lambda name: NamedCType(name, BaseCType(symIntArrayRefT)),
+                "expr": stride_expr,
+            },
+        ),
+        # replace self.layout() with self_layout
+        (
+            r"{}.layout\(\)",
+            {
+                "suffix": "_layout",
+                "nctype": lambda name: NamedCType(name, BaseCType(layoutT)),
+            },
+        ),
+        # replace self.is_conj() with self_conjugate
+        (
+            r"{}.is_conj\(\)",
+            {
+                "suffix": "_conjugate",
+                "nctype": lambda name: NamedCType(name, BaseCType(boolT)),
+            },
+        ),
+    ]
+
+    # find which arguments need to be saved
+    saved: list[SavedAttribute] = []
+
+    if ".sizes()" in formula or "->sizes()" in formula:
+        raise RuntimeError(
+            ".sizes() is not supported in derivative formulas. Instead, please use the SymInt version,"
+            + f".sym_sizes(), which returned a c10::SymIntArrayRef. formula={formula}"
+        )
+    if re.search(r"\.size\([-]?\d+\)", formula) or re.search(
+        r"->size\([-]?\d+\)", formula
+    ):
+        raise RuntimeError(
+            ".size(int) is not supported in derivative formulas. Instead, please use the SymInt version,"
+            + f".sym_size(int), which returned a c10::SymIntArrayRef. formula={formula}"
+        )
+    if ".strides()" in formula or "->strides()" in formula:
+        raise RuntimeError(
+            ".strides() is not supported in derivative formulas. Instead, please use the SymInt version,"
+            + f".sym_strides(), which returned a c10::SymIntArrayRef. formula={formula}"
+        )
+    for nctype in nctypes:
+        name = (
+            nctype.name.name if isinstance(nctype.name, SpecialArgName) else nctype.name
+        )
+        # First search the formula for expressions which can be evaluated
+        # when the autograd Function is created to avoid saving variables
+        for regex, info in REPLACEMENTS:
+
+            def repl(m: re.Match[str]) -> str:
+                suffix: str = (
+                    info["suffix"](m) if callable(info["suffix"]) else info["suffix"]
+                )
+                expr: str = info["expr"](name) if "expr" in info else m.group(0)
+                saved.append(
+                    SavedAttribute(
+                        nctype=info["nctype"](name + suffix),
+                        expr=expr,
+                    )
+                )
+                if "res" in info:
+                    replacement: str = info["res"](name)
+                    return replacement
+                return name + suffix
+
+            formula = re.sub(regex.format(name), repl, formula)
+
+        # std::optional<std::string> types stored in Backward nodes must be
+        # converted to std::optional<std::string_view> before being passed into
+        # the backward function
+        if nctype.type == OptionalCType(BaseCType(stringT)):
+            formula = re.sub(
+                rf"\b{name}\b",
+                f"{name}.has_value() ? std::optional<c10::string_view>({name}.value()) : std::nullopt",
+                formula,
+            )
+
+        # Find any variables which remain in the formula and save them
+        if re.search(IDENT_REGEX.format(name), formula):
+            saved.append(
+                SavedAttribute(
+                    nctype=nctype,
+                    expr=name,
+                )
+            )
+
+    return formula, tuple(saved)
+
+
+def _create_op_prefix(name: str) -> str:
+    """Takes a native function name converts to a op prefix name.
+
+    Note that the "name" parameter must be the native function name
+    without the optional variant suffix, so "add" instead of
+    "add.out".
+
+    OP names correspond to classes, hence the change to title case.
+
+    Example::
+    >>> _create_op_prefix('add')
+    'AddBackward'
+    """
+    camel_case = "".join([p.title() for p in name.split("_")])
+    return (camel_case + "Backward").replace("ForwardBackward", "Backward")
+
+
+def dedup_vars(vars: Sequence[SavedAttribute]) -> Sequence[SavedAttribute]:
+    seen: set[str] = set()
+    saved: list[SavedAttribute] = []
+    for var in vars:
+        name = (
+            var.nctype.name.name
+            if isinstance(var.nctype.name, SpecialArgName)
+            else var.nctype.name
+        )
+        if name in seen:
+            continue
+        seen.add(name)
+        saved.append(var)
+    return saved

minigpt2/lib/python3.10/site-packages/torchgen/packaged/autograd/templates/VariableType.cpp

@@ -0,0 +1,65 @@
+#include "torch/csrc/autograd/VariableTypeUtils.h"
+#include "torch/csrc/autograd/generated/VariableType.h"
+#include "torch/csrc/autograd/FunctionsManual.h"
+
+#include <ATen/RedispatchFunctions.h>
+#include <c10/core/impl/TorchDispatchModeTLS.h>
+#include <ATen/core/TorchDispatchUtils.h>
+#include <torch/library.h>
+
+#include <ATen/SparseCsrTensorUtils.h>
+
+
+// ${generated_comment}
+
+// NOTE [Sharded File]: on this file's split-into-shards state
+//
+// Back in the good old days, VariableType.cpp was generated as one
+// file with every function in it, and everything was great and
+// simple.
+//
+// However, this file was also very large (over 36,000 lines), and
+// compiling it was very slow, and in fact was a significant
+// bottleneck for incremental rebuilds. To address this, we now
+// generate the file split across multiple shards, named
+// VariableType_0.cpp and so on, which can be compiled in parallel.
+//
+// For ease of inspection and debugging, so that it's not necessary to
+// go rooting around in multiple files, we also generate all the
+// functions together in VariableTypeEverything.cpp. This generated
+// file is only for convenience; it's not actually used in the
+// build. If the file you're looking at now is one of the shards, you
+// may want to switch over to the Everything variant to make you
+// grepping smoother.
+
+using namespace at;
+using namespace torch::autograd::generated;
+using namespace torch::autograd::generated::details;
+
+
+namespace torch::autograd {
+
+namespace VariableType {
+namespace{
+  C10_UNUSED void reset_grad_accumulator(Variable & self) {
+    AutogradMeta* meta = torch::autograd::impl::get_autograd_meta(self);
+    if (meta != nullptr) {
+      meta->grad_accumulator_.reset();
+    }
+  }
+}
+
+namespace {
+
+
+${type_derived_method_definitions}
+}
+}
+
+namespace {
+
+${wrapper_registrations}
+
+}
+
+} // namespace torch::autograd

minigpt2/lib/python3.10/site-packages/torchgen/packaged/autograd/templates/ViewFuncs.cpp

@@ -0,0 +1,14 @@
+#include <torch/csrc/autograd/generated/ViewFuncs.h>
+
+// ${generated_comment}
+
+using at::Tensor;
+using at::Scalar;
+using at::IntArrayRef;
+using at::TensorList;
+
+namespace torch::autograd::generated {
+
+${view_func_definitions}
+
+} // namespace torch::autograd::generated

minigpt2/lib/python3.10/site-packages/torchgen/packaged/autograd/templates/ViewFuncs.h

@@ -0,0 +1,28 @@
+#pragma once
+
+// ${generated_comment}
+
+#include <torch/library.h>
+#include <torch/csrc/autograd/variable.h>
+#include <c10/core/SymIntArrayRef.h>
+
+#ifndef AT_PER_OPERATOR_HEADERS
+#include <ATen/Operators.h>
+#else
+$ops_headers
+#endif
+
+namespace torch::autograd::generated {
+
+using at::Scalar;
+using at::Tensor;
+using at::IntArrayRef;
+using at::ArrayRef;
+using at::Type;
+using at::ScalarType;
+using std::optional;
+using c10::fmap;
+
+${view_func_declarations}
+
+} // namespace torch::autograd::generated