diff --git "a/llmeval-env/lib/python3.10/site-packages/torchgen/gen.py" "b/llmeval-env/lib/python3.10/site-packages/torchgen/gen.py" new file mode 100644--- /dev/null +++ "b/llmeval-env/lib/python3.10/site-packages/torchgen/gen.py" @@ -0,0 +1,2937 @@ +import argparse +import functools +import json +import os +import pathlib +from collections import defaultdict, namedtuple, OrderedDict +from dataclasses import dataclass, field +from typing import ( + Any, + Callable, + Dict, + List, + Literal, + Optional, + Sequence, + Set, + Tuple, + TypeVar, + Union, +) + +import yaml + +import torchgen.api.dispatcher as dispatcher +import torchgen.api.meta as meta +import torchgen.api.native as native +import torchgen.api.structured as structured +import torchgen.dest as dest + +from torchgen.api import cpp +from torchgen.api.translate import translate +from torchgen.api.types import ( + Binding, + CppSignature, + CppSignatureGroup, + DispatcherSignature, + NamedCType, + NativeSignature, + SpecialArgName, +) +from torchgen.context import ( + method_with_native_function, + native_function_manager, + with_native_function, + with_native_function_and_indices, +) +from torchgen.gen_aoti_c_shim import ( + gen_aoti_c_shim, + gen_static_dispatch_backend_call_signature, + get_backend_index_for_aoti, +) +from torchgen.gen_functionalization_type import ( + gen_functionalization_definition, + gen_functionalization_registration, + gen_functionalization_view_inverse_declaration, + GenCompositeViewCopyKernel, +) +from torchgen.gen_vmap_plumbing import gen_all_vmap_plumbing + +from torchgen.model import ( + Argument, + BackendIndex, + BackendMetadata, + BaseOperatorName, + DEFAULT_KERNEL_NAMESPACE, + DispatchKey, + FRAGMENT_NAMESPACES, + FunctionSchema, + is_cuda_dispatch_key, + is_generic_dispatch_key, + is_ufunc_dispatch_key, + Location, + NativeFunction, + NativeFunctionsGroup, + NativeFunctionsViewGroup, + OperatorName, + OptionalType, + SchemaKind, + SelfArgument, + STRUCTURED_DISPATCH_KEYS, + TensorOptionsArguments, + Type, + Variant, + ViewSchemaKind, +) +from torchgen.native_function_generation import ( + add_generated_native_functions, + gen_composite_functional_kernel, + gen_composite_out_kernel, + pre_group_native_functions, +) +from torchgen.selective_build.selector import SelectiveBuilder +from torchgen.utils import ( + assert_never, + concatMap, + context, + FileManager, + make_file_manager, + mapMaybe, + NamespaceHelper, + Target, +) +from torchgen.yaml_utils import YamlDumper, YamlLoader + +T = TypeVar("T") + +# Welcome to the ATen code generator v2! The ATen code generator is +# responsible for parsing native_functions.yaml and then generating +# various generated files (e.g., TypeDefault.cpp) based on the operators +# defined in this file. This means that the code generator knows how to +# parse function schema, and then translate this into various C++ types +# and boilerplate code. +# +# Some things to know about this file when you modify it: +# +# - This file has STRICT mypy typechecking. Typecheck it with +# `mypy --config mypy-strict.ini` in the root source directory +# +# - Most of the heavy lifting lives in external modules: +# - 'model' has the data model for native_functions.yaml. The classes +# in those file represent what you see when you look at +# a native_functions.yaml +# - 'api' has conversions for how to translate JIT schema into +# the various C++ APIs that the codegen interacts with. There +# are in fact THREE different C++ APIs: the public C++ API, +# the dispatcher API, and the legacy dispatcher API. See each +# of these respective files for more information + +# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # +# +# HELPER FUNCTIONS +# +# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # + + +# A custom loader for YAML to let us also keep track of line numbers +# of each entry in the YAML file +class LineLoader(YamlLoader): + def construct_mapping(self, node, deep=False): # type: ignore[no-untyped-def] + mapping = super().construct_mapping(node, deep=deep) # type: ignore[no-untyped-call] + # Add 1 so line numbering starts at 1 + mapping["__line__"] = node.start_mark.line + 1 + return mapping + + +# Parse native_functions.yaml into a sequence of NativeFunctions and Backend Indices. +ParsedYaml = namedtuple("ParsedYaml", ["native_functions", "backend_indices"]) + + +_GLOBAL_PARSE_NATIVE_YAML_CACHE: Dict[str, ParsedYaml] = {} +_GLOBAL_PARSE_TAGS_YAML_CACHE: Dict[str, Set[str]] = {} + + +def parse_native_yaml_struct( + es: object, + valid_tags: Set[str], + ignore_keys: Optional[Set[DispatchKey]] = None, + path: str = "", + skip_native_fns_gen: bool = False, +) -> ParsedYaml: + assert isinstance(es, list) + rs: List[NativeFunction] = [] + bs: Dict[DispatchKey, Dict[OperatorName, BackendMetadata]] = defaultdict(dict) + for e in es: + assert isinstance(e.get("__line__"), int), e + loc = Location(path, e["__line__"]) + funcs = e.get("func") + with context(lambda: f"in {loc}:\n {funcs}"): + func, m = NativeFunction.from_yaml(e, loc, valid_tags, ignore_keys) + rs.append(func) + BackendIndex.grow_index(bs, m) + error_check_native_functions(rs) + # Default dict is to prevent the codegen from barfing when we have a dispatch key that has no kernels yet. + indices: Dict[DispatchKey, BackendIndex] = defaultdict( + lambda: BackendIndex( + dispatch_key=DispatchKey.Undefined, + use_out_as_primary=True, + external=False, + device_guard=False, + # I'm actually not sure about this; undefined could be hit on + # empty TensorList, hypothetically that could have sizes in it + index={}, + ) + ) + if not skip_native_fns_gen: + add_generated_native_functions(rs, bs) + for k, v in bs.items(): + # All structured in-tree operators are implemented in terms of their out operator. + indices[k] = BackendIndex( + dispatch_key=k, + use_out_as_primary=True, + external=False, + # Only cuda-like devices in tree require device guards + device_guard=is_cuda_dispatch_key(k), + index=v, + ) + return ParsedYaml(rs, indices) + + +def parse_tags_yaml_struct(es: object, path: str = "") -> Set[str]: + assert isinstance(es, list) + rs: Set[str] = set() + for e in es: + assert isinstance(e.get("__line__"), int), e + loc = Location(path, e["__line__"]) + tags = e.get("tag") + with context(lambda: f"in {loc}:\n {tags}"): + e_i = e.copy() + name = e_i.pop("tag") + desc = e_i.pop("desc", "") + # ensure that each tag has a non-empty description + assert desc != "" + rs.add(name) + return rs + + +@functools.lru_cache(maxsize=None) +def parse_tags_yaml(path: str) -> Set[str]: + global _GLOBAL_PARSE_TAGS_YAML_CACHE + if path not in _GLOBAL_PARSE_TAGS_YAML_CACHE: + with open(path) as f: + es = yaml.load(f, Loader=LineLoader) + _GLOBAL_PARSE_TAGS_YAML_CACHE[path] = parse_tags_yaml_struct(es, path=path) + + return _GLOBAL_PARSE_TAGS_YAML_CACHE[path] + + +def parse_native_yaml( + path: str, + tags_yaml_path: str, + ignore_keys: Optional[Set[DispatchKey]] = None, + *, + skip_native_fns_gen: bool = False, + loaded_yaml: Optional[object] = None, +) -> ParsedYaml: + global _GLOBAL_PARSE_NATIVE_YAML_CACHE + if path not in _GLOBAL_PARSE_NATIVE_YAML_CACHE: + valid_tags = parse_tags_yaml(tags_yaml_path) + + # if a loaded yaml is provided, use that instead of reading from path + if loaded_yaml is None: + with open(path) as f: + es = yaml.load(f, Loader=LineLoader) + else: + es = loaded_yaml + + _GLOBAL_PARSE_NATIVE_YAML_CACHE[path] = parse_native_yaml_struct( + es, + valid_tags, + ignore_keys, + path=path, + skip_native_fns_gen=skip_native_fns_gen, + ) + + return _GLOBAL_PARSE_NATIVE_YAML_CACHE[path] + + +# Some assertions are already performed during parsing, but those are only within a single NativeFunction. +# Assertions here are meant to be performed across NativeFunctions. +def error_check_native_functions(funcs: Sequence[NativeFunction]) -> None: + func_map: Dict[OperatorName, NativeFunction] = {} + base_func_map: Dict[BaseOperatorName, List[NativeFunction]] = defaultdict(list) + for f in funcs: + func_map[f.func.name] = f + base_func_map[f.func.name.name].append(f) + for f in funcs: + if f.structured_delegate is not None: + delegate_func = func_map[f.structured_delegate] + assert delegate_func.structured, ( + f"{f.func.name} is marked as a structured_delegate pointing to " + f"{f.structured_delegate}, but {f.structured_delegate} is not marked as structured. " + f"Consider adding 'structured=True' to the delegated operator" + ) + # See Note [resize_ in Functionalization] + # resize_() is technically an inplace view op (and therefore needs the tag), + # but it would be overkill to add a true "view" variant of resize. + # Instead, resize_() gets special treatment in functionalization, + # and we have a resize() op that is non-aliasing + functional. + if ( + "inplace_view" in f.tags + and str(f.func.name) != "resize_" + and str(f.func.name) != "resize_as_" + and str(f.func.name.name) != "set_" + ): + base_name = f.func.name.name + overload_name = f.func.name.overload_name + assert base_name.inplace, ( + f"{f.func.name} is marked with tag: inplace_view, but it doesn't follow the naming " + "convention for inplace ops - the codegen expects the base name to have a trailing underscore. " + ) + out_of_place_base_name = BaseOperatorName( + base_name.base, False, base_name.dunder_method + ) + assert len(base_func_map[out_of_place_base_name]) > 0, ( + f"{f.func.name} is marked with tag: inplace_view. The codegen expects there to be a corresponding " + f"out-of-place view op with the name '{base_name}' and matching schema, but it didn't find one. " + ) + + +def cpp_string(s: str) -> str: + """Convert a python string into a c++ string literal""" + s = s.replace("\\", "\\\\") + s = s.replace('"', '\\"') + s = s.replace("\a", "\\a") + s = s.replace("\b", "\\b") + s = s.replace("\f", "\\f") + s = s.replace("\n", "\\n") + s = s.replace("\v", "\\v") + s = s.replace("\t", "\\t") + return f'"{s}"' + + +# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # +# +# C++ CODE GENERATION +# +# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # + +# Most functions in this section are curried: they consist of a function +# that takes some parameters (e.g., what is to be generated) which itself +# returns a function that actually maps NativeFunction to the code +# to be generated. This pattern makes it convenient to use map, concatMap +# and similar functional combinators. + + +def static_dispatch_keys(backends: List[BackendIndex]) -> List[DispatchKey]: + if len(backends) == 0: + return [] + else: + return [backend.dispatch_key for backend in backends] + [ + DispatchKey.CompositeImplicitAutograd, + DispatchKey.CompositeImplicitAutogradNestedTensor, + DispatchKey.CompositeExplicitAutograd, + DispatchKey.CompositeExplicitAutogradNonFunctional, + ] + + +def get_static_dispatch_backend( + f: NativeFunction, backend_index: BackendIndex +) -> Optional[DispatchKey]: + if f.structured_delegate is not None or backend_index.has_kernel(f): + # TODO: for ops with structured_delegate it should check the dispatch table of + # the out variant instead. For now, these structured ops all have CPU/CUDA kernels + # so we always dispatch to the `backend`, but this could be wrong when we + # migrate math/default_backend ops to use structured delegate. + return backend_index.dispatch_key + elif f.has_composite_explicit_autograd_kernel: + return DispatchKey.CompositeExplicitAutograd + elif f.has_composite_explicit_autograd_non_functional_kernel: + return DispatchKey.CompositeExplicitAutogradNonFunctional + elif f.has_composite_implicit_autograd_kernel: + return DispatchKey.CompositeImplicitAutograd + elif f.has_composite_implicit_autograd_nested_tensor_kernel: + return DispatchKey.CompositeImplicitAutogradNestedTensor + return None + + +def static_dispatch_ops_header( + f: NativeFunction, backend_index: List[BackendIndex] +) -> Optional[str]: + if backend_index is None or f.manual_kernel_registration: + return None + + output = [] + for index in backend_index: + dispatch_key = get_static_dispatch_backend(f, index) + if dispatch_key is not None: + output.append( + f"#include " + ) + return "\n".join(output) + + +def static_dispatch_extra_headers(backends: List[BackendIndex]) -> List[str]: + return [ + f"#include " + for dispatch_key in static_dispatch_keys(backends) + ] + + +# Translates arguments of `sig` to CppSignature bindings. +# Note that we have a special case for `memory_format` argument and this case is not covered by +# tools.codegen.api.translate() yet as its application is limited to static dispatch. +def translate_args( + sig: Union[CppSignature, DispatcherSignature], + cpp_sig: CppSignature, +) -> str: + # Adds SpecialArgName.possibly_redundant_memory_format NamedCType for memory_format bindings + def add_spl_memory_format_binding(input_bindings: List[Binding]) -> List[Binding]: + output_bindings: List[Binding] = [] + for binding in input_bindings: + if binding.name == "memory_format": + spl_mem_format_binding = Binding( + nctype=NamedCType( + SpecialArgName.possibly_redundant_memory_format, + binding.nctype.type, + ), + name=binding.name, + default=binding.default, + argument=binding.argument, + ) + output_bindings.append(spl_mem_format_binding) + else: + output_bindings.append(binding) + return output_bindings + + src_bindings = list(sig.arguments()) + goal_bindings = list(cpp_sig.arguments()) + # When last argument of CPP signature has SpecialArgName.possibly_redundant_memory_format NCType, + # get memory_format bindings of dispatcher signature to have the same NCType as well + for arg in goal_bindings: + if arg.nctype.name == SpecialArgName.possibly_redundant_memory_format: + src_bindings = add_spl_memory_format_binding(src_bindings) + break + exprs = translate(src_bindings, goal_bindings) + return ", ".join(a.expr for a in exprs) + + +def generate_static_dispatch_backend_call( + sig: Union[CppSignature, DispatcherSignature], + f: NativeFunction, + backend_index: BackendIndex, +) -> str: + cpp_sig = gen_static_dispatch_backend_call_signature(sig, f) + name = cpp_sig.name() + exprs = translate_args(sig, cpp_sig) + backend_metadata = backend_index.get_kernel(f) + kernel_ns = ( + backend_metadata.cpp_namespace + if backend_metadata and backend_metadata.cpp_namespace + else DEFAULT_KERNEL_NAMESPACE + ) + ns = kernel_ns.replace("::native", "") + return f"return {ns}::{backend_index.dispatch_key.lower()}::{name}({exprs});" + + +def generate_static_dispatch_fallback_call( + sig: Union[CppSignature, DispatcherSignature], + f: NativeFunction, + backend_indices: List[BackendIndex], +) -> str: + cpp_sigs = CppSignatureGroup.from_native_function( + f, method=False, fallback_binding=False + ) + if sig.symint and f.func.has_symint(): + cpp_sig = cpp_sigs.symint_signature + else: + cpp_sig = cpp_sigs.signature + assert cpp_sig is not None + name = cpp_sig.name() + exprs = translate_args(sig, cpp_sig) + ns = DEFAULT_KERNEL_NAMESPACE.replace("::native", "") + if f.has_composite_explicit_autograd_kernel: + return f"return {ns}::{DispatchKey.CompositeExplicitAutograd.lower()}::{name}({exprs});" + elif f.has_composite_explicit_autograd_non_functional_kernel: + return f"return {ns}::{DispatchKey.CompositeExplicitAutogradNonFunctional.lower()}::{name}({exprs});" + elif f.has_composite_implicit_autograd_kernel: + return f"return {ns}::{DispatchKey.CompositeImplicitAutograd.lower()}::{name}({exprs});" + elif f.has_composite_implicit_autograd_nested_tensor_kernel: + return f"return {ns}::{DispatchKey.CompositeImplicitAutogradNestedTensor.lower()}::{name}({exprs});" + else: + return f"""TORCH_CHECK(false, "Static dispatch does not support {name} for\ +{', '.join([str(index.dispatch_key)for index in backend_indices])} ");""" + + +def static_dispatch( + sig: Union[CppSignature, DispatcherSignature], + f: NativeFunction, + backend_indices: List[BackendIndex], +) -> str: + """ + For a given `NativeFunction`, find out the corresponding backend and dispatch to it. If more than one + backends exsit, fallback to static dispatch by determining dispatch key from inputs. + Arguments: + sig: A CppSignature or DispatcherSignature for this native function we want to use. + f: NativeFunction to generate static dispatch. + backend_indices: All available backends. + Return: + C++ code to call backend-specific functions, e.g., "return at::cpu::add(self, other, scale);" + """ + if len(backend_indices) == 0 or f.manual_kernel_registration: + return "" + + keys = [ + b + for b in backend_indices + if b.has_kernel(f) + or ( + f.structured_delegate is not None + and b.dispatch_key in STRUCTURED_DISPATCH_KEYS + ) + ] + if len(keys) == 1: + return generate_static_dispatch_backend_call(sig, f, keys[0]) + elif len(keys) == 0: + return generate_static_dispatch_fallback_call(sig, f, backend_indices) + + native_tensor_args = [ + a.name + for a in sig.arguments() + if isinstance(a.argument, SelfArgument) + or isinstance(a.argument, Argument) + and a.argument.type.is_tensor_like() + ] + tensor_args = ", ".join(native_tensor_args) + tensor_opts = f.func.arguments.tensor_options + + stmts = [] + subexprs: List[str] = [] + if tensor_opts is not None: + subexprs.append( + "DispatchKeySet(c10::computeDispatchKey(dtype, layout, device))" + ) + if tensor_args != "": + subexprs.append(f"c10::detail::multi_dispatch_key_set({tensor_args})") + stmts.append(f"""DispatchKeySet _dk_set = {' | '.join(subexprs)};""") + stmts.append("DispatchKey _dk = c10::highestPriorityBackendTypeId(_dk_set);") + + dispatch_code = [] + for index in keys: + dispatch_code.append(f"""case DispatchKey::{index.dispatch_key}:""") + dispatch_code.append( + f"""\t{generate_static_dispatch_backend_call(sig, f, index)};""" + ) + + fallback = generate_static_dispatch_fallback_call(sig, f, backend_indices) + connector = "\n\t\t" + + return f""" + {connector.join(stmts)} + switch (_dk) {{ + {connector.join(dispatch_code)} + default: + {fallback} + }} + """ + + +# Generates RegisterSchema.cpp. Depending on the selector, either +# all schemas are registered, or only some are (in the case of +# selective build) +@dataclass(frozen=True) +class RegisterSchema: + selector: SelectiveBuilder + known_tags: Dict[str, int] = field(default_factory=dict) + + @method_with_native_function + def __call__(self, f: NativeFunction) -> Optional[str]: + if not self.selector.is_native_function_selected(f): + return None + tags = "{" + ", ".join(f"at::Tag::{tag}" for tag in sorted(f.tags)) + "}" + if tags == "{}": + return f"m.def({cpp_string(str(f.func))}, {{}});\n" + maybe_tags = "" + if tags not in self.known_tags: + idx = len(self.known_tags) + self.known_tags[tags] = idx + maybe_tags = f"const std::vector tags_{idx} = {tags};\n" + return f"{maybe_tags}m.def({cpp_string(str(f.func))}, tags_{self.known_tags[tags]});\n" + + +# Generates Operators.h and Operators.cpp. +# These provide macros that, given an operator and overload name, allow users +# to access an "un-overloaded" function version of the operator. This +# is useful for extension writers who want to (1) want to decltype the operator +# and (2) don't want to worry about method-only operators. +@dataclass(frozen=True) +class ComputeOperators: + target: Literal[Target.DECLARATION, Target.DEFINITION] + static_dispatch_backend_indices: List[BackendIndex] + + @method_with_native_function + def __call__(self, f: NativeFunction) -> str: + sig = DispatcherSignature.from_schema(f.func) + name = f.func.name.unambiguous_name() + + if self.target is Target.DECLARATION: + # Note [The ATen Operators API] + # The ATen Operators API lives in the at::_ops namespace, and contains compile-time + # metadata about each operator + entry points into the Dispatcher. + # The C++ function, method, and redispatch API's are all implemented as wrappers + # into various bits of the structs defined here. + # + # Important characteristics about the Operators API: + # (1) It follows the Dispatcher API. + # This is kind of necessary to avoid overhead. + # For example: if it followed the C++ API, then all of the faithful C++ factory functions + # would need to wrap their arguments into TensorOptions only to unwrap them again. + # (2) Overload names are disambiguated. + # This is helpful for pytorch extenders who would like to decltype() an aten operator, + # that has overloads, e.g. decltype(at::_ops::mul_Tensor::call) + # (3) No argument defaulting is allowed. + # This is more of an implementation detail to avoid #include cycles, + # since TensorBody.h (which defines the Tensor class) needs to include this file. + # (4) manual_cpp_bindings and faithful names are not included in the API. + # This applies to stuff like __dispatch__is_complex(), and add_outf(). + # These aren't "real aten ops", they're just additional functions provided by the C++ API. + # They're implemented as wrappers in Functions.h that call into the actual operators + # defined here, i.e. at::_ops::is_complex::call() and at::_ops::add_out::call(). + # This means that ATEN_OP(is_complex) will not fastpath, and will go through the dispatcher. + return f""" +struct TORCH_API {name} {{ + using schema = {sig.type()}; + using ptr_schema = schema*; + // See Note [static constexpr char* members for windows NVCC] + STATIC_CONSTEXPR_STR_INL_EXCEPT_WIN_CUDA(name, "aten::{f.func.name.name}") + STATIC_CONSTEXPR_STR_INL_EXCEPT_WIN_CUDA(overload_name, "{f.func.name.overload_name}") + STATIC_CONSTEXPR_STR_INL_EXCEPT_WIN_CUDA(schema_str, {cpp_string(str(f.func))}) + static {sig.defn(name="call", is_redispatching_fn=False)}; + static {sig.defn(name="redispatch", is_redispatching_fn=True)}; +}};""" + + elif self.target is Target.DEFINITION: + defns = f""" +STATIC_CONST_STR_OUT_OF_LINE_FOR_WIN_CUDA({name}, name, "aten::{f.func.name.name}") +STATIC_CONST_STR_OUT_OF_LINE_FOR_WIN_CUDA({name}, overload_name, "{f.func.name.overload_name}") +STATIC_CONST_STR_OUT_OF_LINE_FOR_WIN_CUDA({name}, schema_str, {cpp_string(str(f.func))}) + +// aten::{f.func} +static C10_NOINLINE c10::TypedOperatorHandle<{name}::schema> create_{name}_typed_handle() {{ + return c10::Dispatcher::singleton() + .findSchemaOrThrow({name}::name, {name}::overload_name) + .typed<{name}::schema>(); +}} +""" + for is_redispatching_fn in [False, True]: + if is_redispatching_fn: + dispatcher_exprs_str = ", ".join( + ["dispatchKeySet"] + [a.name for a in sig.arguments()] + ) + method_base = "redispatch" + else: + dispatcher_exprs_str = ", ".join([a.name for a in sig.arguments()]) + method_base = "call" + + dispatcher_call = method_base + method_name = f"{name}::{method_base}" + + fn_body = f""" + static auto op = create_{name}_typed_handle(); + return op.{dispatcher_call}({dispatcher_exprs_str});""" + + if ( + not is_redispatching_fn + and len(self.static_dispatch_backend_indices) > 0 + ): + # call() should go through static dispatch + fn_body = static_dispatch( + sig, f, backend_indices=self.static_dispatch_backend_indices + ) + defns += f""" +// aten::{f.func} +{sig.defn(name=method_name, is_redispatching_fn=is_redispatching_fn)} {{ + {fn_body} +}} +""" + return defns + else: + assert_never(self.target) + + +# Generates Functions.h, which provides the functional public C++ API, +# and the scaffolding to call into the dispatcher from these functions. +@dataclass(frozen=True) +class ComputeFunction: + @method_with_native_function + def __call__(self, f: NativeFunction) -> Optional[str]: + sig_group = CppSignatureGroup.from_native_function( + f, method=False, fallback_binding=f.manual_cpp_binding + ) + has_symint = f.func.has_symint() + + result = "" + for sig in sig_group.signatures(): + # See Note [The ATen Operators API] + target_sig = DispatcherSignature.from_schema(f.func) + exprs = translate(sig.arguments(), target_sig.arguments()) + exprs_str = ", ".join([e.expr for e in exprs]) + + if sig.symint: + intlike_t = "c10::SymInt" + else: + intlike_t = "int64_t" + + if Variant.function in f.variants: + result += f""" +// aten::{f.func} +inline {sig.decl()} {{ + return at::_ops::{f.func.name.unambiguous_name()}::call({exprs_str}); +}}""" + + # The template function can be used from template situations + # where you want to switch between the symint or not version + # depending on a template argument + # + # NB: we ALWAYS generate this even for methods. But we put it in + # this header so it can take advantage of per-op headers + if has_symint: + result += f""" +namespace symint {{ + template ::value>> + {sig.decl(suppress_symint_suffix=True)} {{ + return at::_ops::{f.func.name.unambiguous_name()}::call({exprs_str}); + }} +}} +""" + return result + + +# Generates TensorBody.h. This file provides the object-oriented (method-based) +# public C++ API, and the scaffolding to call into the dispatcher from these functions. +@dataclass(frozen=True) +class ComputeTensorMethod: + target: Literal[Target.DECLARATION, Target.DEFINITION] + static_dispatch_backend_indices: List[BackendIndex] + + @method_with_native_function + def __call__(self, f: NativeFunction) -> Optional[str]: + if Variant.method not in f.variants: + return None + + assert not f.func.is_out_fn() + assert f.func.arguments.self_arg is not None + + sig_group = CppSignatureGroup.from_native_function( + f, method=True, fallback_binding=f.manual_cpp_binding + ) + + if self.target is Target.DECLARATION: + result = "" + for sig in sig_group.signatures(): + result += f"{sig.decl()} const;\n" + return result + + if self.target is not Target.DEFINITION: + assert_never(self.target) + + result = "" + + for sig in sig_group.signatures(): + target_sig = DispatcherSignature.from_schema(f.func) + exprs = translate(sig.arguments(), target_sig.arguments(), method=True) + exprs_str = ", ".join([e.expr for e in exprs]) + + result += f""" +// aten::{f.func} +inline {sig.defn(prefix="Tensor::")} const {{ + return at::_ops::{f.func.name.unambiguous_name()}::call({exprs_str}); +}} +""" + + return result + + +# Generates RedispatchFunctions.h. +# This is similar to the C++ API defined in Functions.h, but provides access +# to the dispatcher's redispatch API. +@dataclass(frozen=True) +class ComputeRedispatchFunction: + @method_with_native_function + def __call__(self, f: NativeFunction) -> Optional[str]: + # We unconditionally generate function variants of the redispatch API. + # This is mainly because we can namespace functions separately, but not methods, + sig_group = CppSignatureGroup.from_native_function( + f, method=False, fallback_binding=f.manual_cpp_binding + ) + + result = "" + for sig in sig_group.signatures(): + target_sig = DispatcherSignature.from_schema(f.func) + exprs = translate(sig.arguments(), target_sig.arguments()) + exprs_str = ", ".join(["dispatchKeySet"] + [a.expr for a in exprs]) + + result += f""" +// aten::{f.func} +inline {sig.decl(is_redispatching_fn=True)} {{ + return at::_ops::{f.func.name.unambiguous_name()}::redispatch({exprs_str}); +}} +""" + + return result + + +# Generates ATenOpList.cpp, a runtime accessible list of all aten +# operators. +# TODO: This was historically used to help some JIT interop code +# figure out whether or not to treat aten namespace'd operators +# one way or another, we should reevaluate if this is actually needed. +@with_native_function +def compute_aten_op(f: NativeFunction) -> str: + return f'{{"aten::{f.func.name.name}", "{f.func.name.overload_name}"}},' + + +# Generates MetaFunctions.h +def compute_meta_function_declaration(g: NativeFunctionsGroup) -> Optional[str]: + if not g.structured: + return None + with native_function_manager(g.out): + name = meta.name(g) + args = structured.meta_arguments(g) + args_str = ", ".join(a.decl() for a in args) + parent_class = g.out.structured_inherits + if parent_class is None: + parent_class = "at::impl::MetaBase" + meta_return = "void" + precomputed = g.out.precomputed if g.structured else None + + if precomputed: + # Generate the template declaration with one bool parameter for each + # precomputed element. Each parameter is true if the corresponding (in + # terms of position) precomputed element has been set. + precomputed_values = [*precomputed.replace.values(), precomputed.add] + precomputed_elements = [ + elem for replace_list in precomputed_values for elem in replace_list + ] + precomputed_template_parameters = [ + elem.name.upper() for elem in precomputed_elements + ] + precomputed_template_params_str = ", ".join( + f"bool {param} = false" for param in precomputed_template_parameters + ) + precompute_template_decl = f"template <{precomputed_template_params_str}>" + + # Generate a string containing declarations of all precomputed elements. + precomputed_elements_with_cpp_types = [ + structured.argument_type(elem, binds=elem.name) + for elem in precomputed_elements + ] + + precomputed_elements_decl = ";\n".join( + f"{elem.cpp_type(strip_ref=True)} {elem.name}" + for elem in precomputed_elements_with_cpp_types + ) + + # Generate "setter" methods for each precomputed element. Each method will return + # a new instance of precompute_out with the template parameter that corresponds to + # the member set by the method to true (to indicate that it has been set). + setter_methods = [] + for i, elem in enumerate(precomputed_elements): + # Generate the signature. The return type will be the same + # as the type of `this` but with the template parameter + # corresponding to the element set by this method set to true. + # The assert generated below will ensure that this template + # parameter is false on the type of `this`. + return_ty_templates = ", ".join( + precomputed_template_parameters[:i] + + ["true"] + + precomputed_template_parameters[i + 1 :] + ) + return_ty = f"precompute_out<{return_ty_templates}>" + elem_cpp_ty = precomputed_elements_with_cpp_types[i].cpp_type( + strip_ref=True + ) + signature = f"{return_ty} set_{elem.name}({elem_cpp_ty} value)" + + # Generate an assert which checks that the + # template parameter corresponding to the precomputed + # element that is set by this method is false on the + # class corresponding to the object that `this` points to. + # This ensures that each element can be set only once. + assert_msg = f'"{precomputed_elements[i].name} already set"' + assert_stmt = f"static_assert({precomputed_template_parameters[i]} == false, {assert_msg});" + + # Generate the new object construction block. All state + # except the element that this method sets is copied from the + # object that `this` points to. The value for the element that + # the method sets is taken from a method parameter. + construction_stmts = [] + construction_stmts.append(f"{return_ty} ret;") + + for j, elem in enumerate(precomputed_elements): + if i == j: + construction_stmts.append(f"ret.{elem.name} = value;") + else: + construction_stmts.append( + f"ret.{elem.name} = this->{elem.name};" + ) + + construction_stmts.append("return ret;") + construction_block = "\n".join(construction_stmts) + + setter_methods.append( + f""" + {signature} {{ + {assert_stmt} + {construction_block} + }} + """ + ) + setter_methods_decl = "\n".join(setter_methods) + + # Meta should return an instance of the struct containing the precomputed elements. + meta_return_template_params = ", ".join( + ["true"] * len(precomputed_template_parameters) + ) + # This typedef (actually a using statement) is needed so that TORCH_META_FUNC can reuse the return + # type (which has a variable number of template parameters). + meta_return_typedef = f"using meta_return_ty = precompute_out <{meta_return_template_params}>;" + meta_return = "meta_return_ty" + precomputed_decl = f""" + {precompute_template_decl} + struct TORCH_API precompute_out {{ + {setter_methods_decl} + {precomputed_elements_decl}; + }};""" + else: + meta_return_typedef = "" + precomputed_decl = "" + + return f"""\ +struct TORCH_API structured_{name} : public {parent_class} {{ + {precomputed_decl} + {meta_return_typedef} + {meta_return} meta({args_str}); +}}; +""" + + +def needs_backend_select(f: NativeFunction, selector: SelectiveBuilder) -> bool: + name = str(f.func.name.name) + if name.endswith("_like") or name.startswith("new_"): + return False + if f.func.arguments.tensor_options is None: + return False + return selector.is_native_function_selected(f) + + +# Generates RegisterBackendSelect.cpp, a series of kernels which provide +# specialized computation of dispatch key for operator signatures which cannot +# be easily done automatically using templating. +@dataclass(frozen=True) +class ComputeBackendSelect: + target: Literal[Target.DEFINITION, Target.REGISTRATION] + + # Selector object to determine which operators to generate + # registration code for. + selector: SelectiveBuilder + + @method_with_native_function + def __call__(self, f: NativeFunction) -> Optional[str]: + if not needs_backend_select(f, self.selector): + return None + + name = native.name(f.func) + # BackendSelect can go to Meta, so it must preserve symints + native_sig = NativeSignature(f.func, symint=True) + + native_tensor_args = [ + a + for a in native_sig.arguments() + if isinstance(a.argument, Argument) and a.argument.type.is_tensor_like() + ] + + dispatcher_sig = DispatcherSignature.from_schema(f.func) + + sig: Union[NativeSignature, DispatcherSignature] + sig = dispatcher_sig + dispatcher_exprs = dispatcher_sig.exprs() + dispatch_key = "c10::computeDispatchKey(dtype, layout, device)" + + if self.target is Target.DEFINITION: + # I don't think there's actually a good reason to generate + # these two cases differently + # The first case could probably be improved though- it calls computeDispatchKeySet(), + # which looks at TLS dispatch keys- there should not be any by the time we reach backend select. + if native_tensor_args: + assert f.func.arguments.has_tensor_arg() + tensor_args = ", ".join(a.name for a in native_tensor_args) + compute_dk = f"""\ +DispatchKeySet _dk_set = c10::DispatchKeySet({dispatch_key}) | c10::detail::multi_dispatch_key_set({tensor_args}); +DispatchKeySet _dk_mask = c10::DispatchKeySet(DispatchKeySet::FULL_AFTER, DispatchKey::BackendSelect); +DispatchKeySet _dk = c10::impl::computeDispatchKeySet(_dk_set, _dk_mask);""" + else: + assert not f.func.arguments.has_tensor_arg() + compute_dk = ( + f"DispatchKeySet _dk = c10::DispatchKeySet({dispatch_key});" + ) + return f"""\ +// aten::{f.func} +C10_ALWAYS_INLINE +{sig.defn(name)} {{ + {compute_dk} + return at::_ops::{f.func.name.unambiguous_name()}::redispatch( + _dk, {', '.join(a.expr for a in dispatcher_exprs)}); +}} +""" + elif self.target is Target.REGISTRATION: + return f"""m.impl("aten::{f.func.name}", TORCH_FN({name}));""" + else: + assert_never(self.target) + + +# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # +# +# YAML CODE GENERATION +# +# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # + + +def format_yaml(data: object) -> str: + # Ignore alias in Dumper + YamlDumper.ignore_aliases = lambda self, data: True # type: ignore[assignment] + + # Support serializing OrderedDict + def dict_representer(dumper: Any, data: Any) -> Any: + return dumper.represent_dict(data.items()) + + YamlDumper.add_representer(OrderedDict, dict_representer) # type: ignore[no-untyped-call] + # Some yaml parsers (e.g. Haskell's) don't understand line breaks. + # width=1e9 turns off optional line breaks and improves + # the portability of the outputted yaml. + return yaml.dump(data, default_flow_style=False, Dumper=YamlDumper, width=1e9) # type: ignore[no-any-return, call-overload] + + +# For some reason, some defaults we write to YAML are written as native +# YAML objects, rather than doing them uniformly as strings. This +# function detects those cases and converts them into native Python +# objects. +def pythonify_default(s: str) -> object: + if s == "true": + return True + elif s == "false": + return False + + try: + return int(s) + except ValueError: + try: + return float(s) + except ValueError: + return s + + +# What is a dynamic type? Over time, the semantic meaning of +# dynamic type has degraded to meaninglessness (in the old days, +# it captured dtype-ness of types, but that has gone away with +# the removal of TH). These days, it's mostly the same thing as +# the C++ API argument type, except that Tensor and Tensor? +# arguments simply present as Tensor. +# +# TODO: Get rid of dynamic_type, after getting tools/autograd +# to use the new codegen framework +def dynamic_type(t: Type) -> str: + if isinstance(t, OptionalType): + return dynamic_type(t.elem) + # Note we don't use t.is_tensor_like() here because it would + # also include Tensor[] + if str(t) == "Tensor": + return "at::Tensor" + # This is a legacy concept, so never report SymInt + return cpp.argumenttype_type( + t, mutable=False, binds="__placeholder__", symint=False + ).cpp_type() + + +def compute_method_of_yaml(variants: Set[Variant]) -> List[str]: + # This is written out explicitly to ensure that Tensor and + # namespace are put into the list in the right order + method_of = ["Type"] + if Variant.method in variants: + method_of.append("Tensor") + if Variant.function in variants: + method_of.append("namespace") + return method_of + + +def compute_returns_yaml( + f: NativeFunction, +) -> Tuple[List[Dict[str, str]], Dict[str, str]]: + # Note [name and field_name] + # ~~~~~~~~~~~~~~~~~~~~~~~~~~ + # To understand name_to_field_name, we must first talk about this + # schema: + # + # lstsq.X(Tensor self, Tensor A, *, Tensor(a!) X, Tensor(b!) qr) -> (Tensor(a!) solution, Tensor(b!) QR) + # + # There is something very odd about this schema: it is an out + # variant of the function (that is to say, it will convert into + # at::lstsq_out() in the C++ API), but the names of the output + # return arguments don't match the keyword argument names of + # the inputs. It TURNS OUT that in this situation, the historical + # Declarations.yaml we want to output is this (abbreviated to + # only show relevant fields): + # + # arguments: + # ... + # - field_name: solution + # name: X + # - field_name: QR + # name: qr + # ... + # + # returns: + # - field_name: solution + # name: X + # - field_name: QR + # name: qr + # + # The name of the return fields is stored in 'field_name', and the + # name of the arguments is stored in 'name'. So when we process + # arguments, we need a way to get at the corresponding return. At + # the moment, this is most conveniently done by constructing a + # mapping from name (the argument concept) to field_name (the + # return concept) while processing return arguments, since we don't + # directly maintain this correspondence in the modeling of function + # schema itself. + # + # See also https://github.com/pytorch/pytorch/issues/43114 + name_to_field_name: Dict[str, str] = {} + + # Compute the returns field of the YAML entry + names = cpp.return_names(f) + returns = [] + for i, (r, name) in enumerate(zip(f.func.returns, names)): + ret = { + "dynamic_type": dynamic_type(r.type), + "name": name, + # legacy, report ints + "type": cpp.return_type(r, symint=False).cpp_type(), + } + + if r.name: + # See Note [name and field_name] + ret["field_name"] = r.name + if f.func.is_out_fn(): + name_to_field_name[f.func.arguments.out[i].name] = r.name + + returns.append(ret) + + return returns, name_to_field_name + + +# arguments in yaml roughly corresponds to the public C++ API +def compute_cpp_argument_yaml( + cpp_a: Binding, + *, + schema_order: bool, + kwarg_only_set: Set[str], + out_arg_set: Set[str], + name_to_field_name: Dict[str, str], +) -> object: + if isinstance(cpp_a.argument, TensorOptionsArguments): + arg: Dict[str, object] = { + "annotation": None, + "dynamic_type": "at::TensorOptions", + "is_nullable": False, + "name": cpp_a.name, + "type": cpp_a.type, + "kwarg_only": True, + } + if cpp_a.default is not None: + arg["default"] = cpp_a.default + return arg + elif isinstance(cpp_a.argument, SelfArgument): + raise AssertionError() + elif isinstance(cpp_a.argument, Argument): + return compute_argument_yaml( + cpp_a.argument, + schema_order=schema_order, + kwarg_only_set=kwarg_only_set, + out_arg_set=out_arg_set, + name_to_field_name=name_to_field_name, + ) + + +def compute_argument_yaml( + a: Argument, + *, + schema_order: bool, + kwarg_only_set: Set[str], + out_arg_set: Set[str], + name_to_field_name: Dict[str, str], +) -> object: + arg: Dict[str, object] = { + "annotation": str(a.annotation) if a.annotation else None, + "dynamic_type": dynamic_type(a.type), + "is_nullable": a.type.is_nullable(), + "name": a.name, + # legacy, report ints + "type": cpp.argument_type(a, binds="__placeholder__", symint=False).cpp_type(), + } + if a.default is not None: + arg["default"] = pythonify_default( + cpp.default_expr(a.default, a.type, symint=False) + ) + if a.name in kwarg_only_set: + arg["kwarg_only"] = True + if a.name in out_arg_set: + arg["output"] = True + arg["allocate"] = True + # See Note [name and field_name] + if a.name in name_to_field_name: + arg["field_name"] = name_to_field_name[a.name] + # Historically, booleans don't get their size recorded, because it + # is already built into the cpp type (e.g., std::array) + l = a.type.is_list_like() + if l is not None and l.size is not None and str(l.elem) != "bool": + arg["size"] = l.size + return arg + + +@with_native_function +def compute_declaration_yaml(f: NativeFunction) -> object: + returns, name_to_field_name = compute_returns_yaml(f) + + # These sets are used to conveniently test if an argument is a + # kwarg-only or out argument + kwarg_only_set = {a.name for a in f.func.arguments.flat_kwarg_only} + out_arg_set = {a.name for a in f.func.arguments.out} + + sig_group = CppSignatureGroup.from_native_function( + f, method=False, fallback_binding=False + ) + cpp_args = sig_group.signature.arguments() + arguments = [ + compute_cpp_argument_yaml( + cpp_a, + schema_order=False, + kwarg_only_set=kwarg_only_set, + out_arg_set=out_arg_set, + name_to_field_name=name_to_field_name, + ) + for cpp_a in cpp_args + ] + + schema_order_jit_arguments = list(f.func.schema_order_arguments()) + + schema_order_arguments = [ + compute_argument_yaml( + a, + schema_order=True, + kwarg_only_set=kwarg_only_set, + out_arg_set=out_arg_set, + name_to_field_name=name_to_field_name, + ) + for a in schema_order_jit_arguments + ] + + cpp_schema_order_types = [ + # NB: method here doesn't matter + r.type + for a in schema_order_jit_arguments + for r in cpp.argument( + a, + method=False, + cpp_no_default_args=set(), + faithful=False, + symint=False, + has_tensor_options=False, + ) + ] + + # legacy, report ints + cpp_returns = cpp.returns_type(f.func.returns, symint=False).cpp_type() + schema_order_cpp_signature = f"{cpp_returns} ({', '.join(cpp_schema_order_types)})" + + is_factory_method = ( + any(isinstance(a.argument, TensorOptionsArguments) for a in cpp_args) + and Variant.method not in f.variants + ) + + return OrderedDict( + [ + ("name", cpp.name(f.func)), + ("operator_name", str(f.func.name.name)), + ("overload_name", str(f.func.name.overload_name)), + ("manual_kernel_registration", f.manual_kernel_registration), + ( + "category_override", + f.category_override if f.category_override is not None else "", + ), + ("schema_string", f"aten::{f.func}"), + ("arguments", arguments), + ("schema_order_cpp_signature", schema_order_cpp_signature), + ("schema_order_arguments", schema_order_arguments), + ("method_of", compute_method_of_yaml(f.variants)), + ("mode", "native"), + ("python_module", "" if f.python_module is None else f.python_module), + ("returns", returns), + ("inplace", f.func.name.name.inplace), + ("is_factory_method", is_factory_method), + ("abstract", f.is_abstract), + ("device_guard", f.device_guard), + ("with_gil", False), + ("deprecated", False), + ("has_math_kernel", f.has_composite_implicit_autograd_kernel), + ] + ) + + +# See Note [Auto generated composite kernels] +def has_autogenerated_composite_kernel(f: NativeFunction) -> bool: + return (f.structured or f.structured_delegate is not None) and ( + f.func.kind() == SchemaKind.functional or f.func.kind() == SchemaKind.inplace + ) + + +@with_native_function_and_indices +def compute_registration_declarations( + f: NativeFunction, backend_indices: Dict[DispatchKey, BackendIndex] +) -> str: + name = dispatcher.name(f.func) + returns_type = dispatcher.returns_type( + f.func.returns + ).cpp_type_registration_declarations() + args = dispatcher.arguments(f.func) + args_str = ", ".join(a.no_default().decl_registration_declarations() for a in args) + comment_data: Dict[str, str] = { + "schema": f"aten::{f.func}", + # TODO: What exactly is the semantics of the 'dispatch' field? + "dispatch": str( + {k for k, v in backend_indices.items() if v.has_kernel(f)} + != {DispatchKey.CompositeImplicitAutograd} + and {k for k, v in backend_indices.items() if v.has_kernel(f)} + != { + DispatchKey.CompositeImplicitAutograd, + DispatchKey.CompositeImplicitAutogradNestedTensor, + } + ), + "default": str(f.has_composite_kernel or has_autogenerated_composite_kernel(f)), + } + return f"""{returns_type} {name}({args_str}); // {json.dumps(comment_data)} +""" + + +# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # +# +# RUN IT ALL +# +# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # + + +def get_custom_build_selector( + provided_op_registration_allowlist: Optional[List[str]], + op_selection_yaml_path: Optional[str], +) -> SelectiveBuilder: + assert not ( + provided_op_registration_allowlist is not None + and op_selection_yaml_path is not None + ), ( + "Both provided_op_registration_allowlist and " + + "op_selection_yaml_path can NOT be provided at the " + + "same time." + ) + + op_registration_allowlist: Optional[Set[str]] = None + if provided_op_registration_allowlist is not None: + op_registration_allowlist = set(provided_op_registration_allowlist) + + if op_registration_allowlist is not None: + selector = SelectiveBuilder.from_legacy_op_registration_allow_list( + op_registration_allowlist, + True, + False, + ) + elif op_selection_yaml_path is not None: + selector = SelectiveBuilder.from_yaml_path(op_selection_yaml_path) + else: + selector = SelectiveBuilder.get_nop_selector() + + return selector + + +def get_grouped_by_view_native_functions( + native_functions: Sequence[NativeFunction], +) -> Sequence[Union[NativeFunction, NativeFunctionsViewGroup]]: + def maybe_create_view_group( + d: Dict[Union[ViewSchemaKind, SchemaKind], NativeFunction] + ) -> List[Union[NativeFunction, NativeFunctionsViewGroup]]: + funcs: List[Union[NativeFunction, NativeFunctionsViewGroup]] = [] + if ViewSchemaKind.aliasing in d: + view = d.pop(ViewSchemaKind.aliasing) + view_inplace = d.pop(ViewSchemaKind.aliasing_inplace, None) + view_copy = d.pop(SchemaKind.functional, None) + + funcs.append( + NativeFunctionsViewGroup( + view=view, + view_copy=view_copy, + view_inplace=view_inplace, + ) + ) + # Take the remaining functions that weren't part of the view group + # and emit them separately + funcs.extend(d.values()) + return funcs + + grouped_by_views: Dict[ + FunctionSchema, Dict[Union[SchemaKind, ViewSchemaKind], NativeFunction] + ] = defaultdict(dict) + for f in native_functions: + schema = f.func.view_signature() + view_kind: ViewSchemaKind = f.view_schema_kind + # We need to group up ops relevant to the same "view", consisting of: + # view op (ViewSchemaKind.aliasing) + # view_inplace op (ViewSchemaKind.aliasing_inplace) + # view_copy op (SchemaKind.functional) + if view_kind == ViewSchemaKind.non_aliasing: + kind = f.func.kind() + assert kind not in grouped_by_views[schema] + grouped_by_views[schema][kind] = f + else: + assert view_kind not in grouped_by_views[schema] + grouped_by_views[schema][view_kind] = f + + return list(concatMap(maybe_create_view_group, grouped_by_views.values())) + + +def get_grouped_native_functions( + native_functions: Sequence[NativeFunction], +) -> Sequence[Union[NativeFunction, NativeFunctionsGroup]]: + def flatten_pre_group( + d: Dict[SchemaKind, NativeFunction] + ) -> Sequence[Union[NativeFunction, NativeFunctionsGroup]]: + r = NativeFunctionsGroup.from_dict(d) + if r is None: + # Invariant: any NativeFunctions that are code-generated + # should have been grouped into NativeFunctionsGroup objects + assert not any("generated" in f.tags for f in d.values()) + return list(d.values()) + else: + return [r] + + # TODO: how come ValuesView isn't a Sequence lol + pre_grouped_native_functions = pre_group_native_functions(native_functions) + return list( + concatMap(flatten_pre_group, list(pre_grouped_native_functions.values())) + ) + + +def get_ns_grouped_kernels( + *, + grouped_native_functions: Sequence[Union[NativeFunction, NativeFunctionsGroup]], + backend_indices: Dict[DispatchKey, BackendIndex], + native_function_decl_gen: Callable[ + [Union[NativeFunctionsGroup, NativeFunction], BackendIndex], List[str] + ] = dest.compute_native_function_declaration, +) -> Dict[str, List[str]]: + ns_grouped_kernels: Dict[str, List[str]] = defaultdict(list) + for f in grouped_native_functions: + native_function_namespaces = set() + dispatch_keys = set() + for dispatch_key, backend_idx in backend_indices.items(): + backend_metadata = backend_idx.get_kernel(f) + if backend_metadata: + namespace = backend_metadata.cpp_namespace + dispatch_keys.add(dispatch_key) + native_function_namespaces.add(namespace) + else: + namespace = DEFAULT_KERNEL_NAMESPACE + assert ( + len(native_function_namespaces) <= 1 + ), f"Codegen only supports one namespace per operator, got {native_function_namespaces} from {dispatch_keys}" + ns_grouped_kernels[namespace].extend( + native_function_decl_gen(f, backend_idx) + ) + return ns_grouped_kernels + + +def get_native_function_declarations_from_ns_grouped_kernels( + *, + ns_grouped_kernels: Dict[str, List[str]], +) -> List[str]: + declarations: List[str] = [] + newline = "\n" + for namespace, kernels in ns_grouped_kernels.items(): + ns_helper = NamespaceHelper( + namespace_str=namespace, + entity_name="", + max_level=4, + ) + # Convert to a set first to remove duplicate kernel names. Backends are + # allowed to repeat kernel names; only generate the declaration once! + ordered_kernels = list(OrderedDict.fromkeys(kernels)) + declarations.extend( + f""" +{ns_helper.prologue} +{newline.join(ordered_kernels)} +{ns_helper.epilogue} + """.split( + newline + ) + ) + return declarations + + +# Return native function declarations grouped by their namespaces. +def get_native_function_declarations( + *, + grouped_native_functions: Sequence[Union[NativeFunction, NativeFunctionsGroup]], + backend_indices: Dict[DispatchKey, BackendIndex], + native_function_decl_gen: Callable[ + [Union[NativeFunctionsGroup, NativeFunction], BackendIndex], List[str] + ] = dest.compute_native_function_declaration, +) -> List[str]: + """ + Generate kernel declarations, in `NativeFunction(s).h`. + :param grouped_native_functions: a sequence of `NativeFunction` or `NativeFunctionGroup`. + :param backend_indices: kernel collections grouped by dispatch key. + :param native_function_decl_gen: callable to generate kernel declaration for each `NativeFunction`. + :return: a list of string, from the string with all declarations, grouped by namespaces, split by newline. + """ + + ns_grouped_kernels = get_ns_grouped_kernels( + grouped_native_functions=grouped_native_functions, + backend_indices=backend_indices, + native_function_decl_gen=native_function_decl_gen, + ) + return get_native_function_declarations_from_ns_grouped_kernels( + ns_grouped_kernels=ns_grouped_kernels + ) + + +def get_kernel_namespace( + *, f: Union[NativeFunction, NativeFunctionsGroup], backend_idx: BackendIndex +) -> str: + backend_metadata = backend_idx.get_kernel(f) + assert not backend_metadata or "::native" in backend_metadata.cpp_namespace, ( + f"The kernel for function {f.func.name if isinstance(f, NativeFunction) else f.functional.func.name} " + f"with dispatch key {backend_idx.dispatch_key}" + f" has a namespace {backend_metadata.cpp_namespace} and it's not ending with '::native'." + ) + return ( + backend_metadata.cpp_namespace if backend_metadata else DEFAULT_KERNEL_NAMESPACE + ) + + +# Return native function definitions grouped by dispatch key and custom namespace. +# Used in RegisterDispatchKey.cpp and etc. +def get_native_function_definitions( + *, + fm: FileManager, + grouped_native_functions: Sequence[Union[NativeFunction, NativeFunctionsGroup]], + dispatch_key: DispatchKey, + backend_idx: BackendIndex, + selector: SelectiveBuilder, + rocm: bool, + symint: bool, + skip_dispatcher_op_registration: bool, + gen_dispatch_helpers: bool, +) -> List[str]: + definitions: List[str] = [] + ns_definitions: Dict[str, List[str]] = defaultdict(list) + anonymous_definitions: Dict[str, List[str]] = defaultdict(list) + registrations: Dict[str, Dict[str, List[str]]] = defaultdict(dict) + newline = "\n" + ns_gen = dest.RegisterDispatchKey( + backend_idx, + Target.NAMESPACED_DEFINITION, + selector, + rocm=rocm, + symint=symint, + class_method_name=None, + skip_dispatcher_op_registration=skip_dispatcher_op_registration, + ) + anonymous_gen = dest.RegisterDispatchKey( + backend_idx, + Target.ANONYMOUS_DEFINITION, + selector, + rocm=rocm, + symint=symint, + class_method_name=None, + skip_dispatcher_op_registration=skip_dispatcher_op_registration, + ) + reg_gen = dest.RegisterDispatchKey( + backend_idx, + Target.REGISTRATION, + selector, + rocm=rocm, + symint=symint, + class_method_name=None, + skip_dispatcher_op_registration=skip_dispatcher_op_registration, + ) + for f in grouped_native_functions: + kernel_namespace = get_kernel_namespace(f=f, backend_idx=backend_idx).replace( + "::native", "" + ) + + ns_definitions[kernel_namespace].extend( + ns_gen(f), + ) + anonymous_definitions[kernel_namespace].extend( + anonymous_gen(f), + ) + namespace = ( + f.namespace if isinstance(f, NativeFunction) else f.functional.namespace + ) + if namespace not in registrations[kernel_namespace]: + registrations[kernel_namespace] = defaultdict(list) + registrations[kernel_namespace][namespace].extend( + reg_gen(f), + ) + + for kernel_namespace in ns_definitions: + if len(ns_definitions[kernel_namespace]) == 0: + continue + ns_helper = NamespaceHelper(namespace_str=kernel_namespace) + registration_body = "" + for namespace in registrations[kernel_namespace]: + if not registrations[kernel_namespace][namespace]: + continue + registration_body += f""" +TORCH_LIBRARY_IMPL({namespace}, {dispatch_key}, m) {{ + {newline.join(registrations[kernel_namespace][namespace])} +}};""" + definitions.extend( + fm.substitute_with_template( + "RegisterDispatchDefinitions.ini", + lambda: { + "ns_prologue": ns_helper.prologue, + "ns_epilogue": ns_helper.epilogue, + "dispatch_helpers": dest.gen_registration_helpers(backend_idx) + if gen_dispatch_helpers + else [], + "dispatch_anonymous_definitions": anonymous_definitions[ + kernel_namespace + ], + "static_init_dispatch_registrations": "" + if skip_dispatcher_op_registration + else registration_body, + "deferred_dispatch_registrations": "", + "dispatch_namespace": dispatch_key.lower(), + "dispatch_namespaced_definitions": ns_definitions[kernel_namespace], + }, + ).split(newline) + ) + + return definitions + + +# Return native function declarations grouped by dispatch key and custom namespace. +# Used in CPUFunctions_inl.h and etc. +def get_namespaced_declaration( + *, + grouped_native_functions: Sequence[Union[NativeFunction, NativeFunctionsGroup]], + dispatch_key: DispatchKey, + backend_idx: BackendIndex, + selector: SelectiveBuilder, + rocm: bool, + symint: bool, +) -> List[str]: + declarations: List[str] = [] + ns_grouped_kernels: Dict[str, List[str]] = defaultdict(list) + newline = "\n" + func = dest.RegisterDispatchKey( + backend_idx, + Target.NAMESPACED_DECLARATION, + selector, + rocm=rocm, + class_method_name=None, + skip_dispatcher_op_registration=False, + symint=symint, + ) + for f in grouped_native_functions: + namespace = get_kernel_namespace(f=f, backend_idx=backend_idx).replace( + "native", dispatch_key.lower() + ) + + ns_grouped_kernels[namespace].extend( + func(f), + ) + + for namespace, kernels in ns_grouped_kernels.items(): + if len(kernels) == 0: + continue + ns_helper = NamespaceHelper( + namespace_str=namespace, entity_name="", max_level=3 + ) + ordered_kernels = list(OrderedDict.fromkeys(kernels)) + declarations.extend( + f""" +{ns_helper.prologue} +{newline.join(ordered_kernels)} +{ns_helper.epilogue} + """.split( + newline + ) + ) + return declarations + + +# Return native function schema registration code for aten and other namespaces. +def get_native_function_schema_registrations( + *, + native_functions: Sequence[NativeFunction], + schema_selector: SelectiveBuilder, +) -> Tuple[List[str], str]: + ns_native_functions: Dict[str, List[NativeFunction]] = defaultdict(list) + for native_function in native_functions: + ns_native_functions[native_function.namespace].append(native_function) + schema_registrations = "" + aten_schema_registrations = [] + custom_namespace = None + for namespace, funcs in ns_native_functions.items(): + schema_registrations_body = list( + mapMaybe(RegisterSchema(schema_selector), funcs) + ) + # NB: we have to separate aten namespace registration from other namespaces, + # because in the template we hardcoded an operator for ATen already. + if namespace == "aten": + aten_schema_registrations = schema_registrations_body + else: + custom_namespace = namespace + tab = "\t" + # if the namespace is predefined, we should use define a library fragment + # instead of a new library + torch_library_macro = ( + "TORCH_LIBRARY_FRAGMENT" + if namespace in FRAGMENT_NAMESPACES + else "TORCH_LIBRARY" + ) + schema_registrations += f""" +{torch_library_macro}({custom_namespace}, m) {{ + {tab.join(schema_registrations_body)} +}};""" + return (aten_schema_registrations, schema_registrations) + + +def gen_aggregated_headers( + *, + native_functions: Sequence[NativeFunction], + grouped_native_functions: Sequence[Union[NativeFunction, NativeFunctionsGroup]], + structured_native_functions: Sequence[NativeFunctionsGroup], + static_dispatch_idx: List[BackendIndex], + selector: SelectiveBuilder, + backend_indices: Dict[DispatchKey, BackendIndex], + cpu_fm: FileManager, + cuda_fm: FileManager, + functions_keys: Set[DispatchKey], + dispatch_keys: Sequence[DispatchKey], + rocm: bool, +) -> None: + # Buck doesn't support dynamic output files, so we aggregate all operator + # headers into a single file + cpu_fm.write( + "NativeMetaFunctions.h", + lambda: { + "NativeMetaFunctions_includes": [], + "NativeMetaFunctions_declarations": list( + mapMaybe(compute_meta_function_declaration, structured_native_functions) + ), + }, + ) + method_native_functions = [ + fn for fn in native_functions if Variant.method in fn.variants + ] + non_method_native_functions = [ + fn for fn in native_functions if fn not in method_native_functions + ] + cpu_fm.write( + "MethodOperators.h", + lambda: { + "MethodOperators_includes": [], + "MethodOperators_declarations": list( + mapMaybe( + ComputeOperators( + Target.DECLARATION, + static_dispatch_backend_indices=static_dispatch_idx, + ), + method_native_functions, + ) + ), + }, + ) + cpu_fm.write( + "Operators.h", + lambda: { + "Operators_includes": ["#include "], + "Operators_declarations": list( + mapMaybe( + ComputeOperators( + Target.DECLARATION, + static_dispatch_backend_indices=static_dispatch_idx, + ), + non_method_native_functions, + ) + ), + }, + ) + cpu_fm.write( + "Functions.h", + lambda: { + "static_dispatch_extra_headers": static_dispatch_extra_headers( + static_dispatch_idx + ), + "Functions_includes": ["#include "], + "Functions_declarations": list( + mapMaybe( + ComputeFunction(), + native_functions, + ) + ), + }, + ) + declarations = get_native_function_declarations( + grouped_native_functions=grouped_native_functions, + backend_indices=backend_indices, + ) + cpu_fm.write( + "NativeFunctions.h", + lambda: { + "NativeFunctions_includes": ["#include "], + "NativeFunctions_declarations": declarations, + }, + ) + + for dispatch_key in dispatch_keys: + fm = cuda_fm if is_cuda_dispatch_key(dispatch_key) else cpu_fm + if dispatch_key in functions_keys: + inl_headers = f"#include " + + fm.write_with_template( + f"{dispatch_key}Functions.h", + "DispatchKeyFunctions.h", + lambda: { + "dispatch_key": str(dispatch_key), + "inline_headers": inl_headers, + }, + ) + fm.write_with_template( + f"{dispatch_key}Functions_inl.h", + "DispatchKeyFunctions_inl.h", + lambda: { + "DispatchKeyFunctions_inl_includes": [], + "dispatch_namespace": dispatch_key.lower(), + "dispatch_namespaced_declarations": get_namespaced_declaration( + grouped_native_functions=grouped_native_functions, + dispatch_key=dispatch_key, + backend_idx=backend_indices[dispatch_key], + selector=selector, + rocm=rocm, + symint=True, + ), + }, + ) + + del fm + + +def gen_per_operator_headers( + *, + native_functions: Sequence[NativeFunction], + grouped_native_functions: Sequence[Union[NativeFunction, NativeFunctionsGroup]], + static_dispatch_idx: List[BackendIndex], + selector: SelectiveBuilder, + backend_indices: Dict[DispatchKey, BackendIndex], + cpu_fm: FileManager, + cuda_fm: FileManager, + ops_fm: FileManager, + functions_keys: Set[DispatchKey], + dispatch_keys: Sequence[DispatchKey], + rocm: bool, +) -> None: + # For CMake builds, split operator declarations into separate headers in + # the ATen/ops folder to split up header dependencies + functions_by_root_name: Dict[str, List[NativeFunction]] = defaultdict(list) + for fn in native_functions: + functions_by_root_name[fn.root_name].append(fn) + + grouped_functions_by_root_name: Dict[ + str, List[Union[NativeFunction, NativeFunctionsGroup]] + ] = defaultdict(list) + for group in grouped_native_functions: + name = group.root_name + grouped_functions_by_root_name[name].append(group) + + for name, functions in functions_by_root_name.items(): + ops_fm.write_with_template( + f"{name}_ops.h", + "Operator.h", + lambda: { + "declarations": list( + mapMaybe( + ComputeOperators( + Target.DECLARATION, + static_dispatch_backend_indices=static_dispatch_idx, + ), + functions, + ) + ), + }, + ) + + ops_fm.write_with_template( + f"{name}.h", + "Function.h", + lambda: { + "static_dispatch_ops_headers": list( + mapMaybe( + lambda fn: static_dispatch_ops_header( + fn, backend_index=static_dispatch_idx + ), + functions, + ) + ), + "operator_includes": f"#include ", + "function_definitions": list( + mapMaybe( + ComputeFunction(), + functions, + ) + ), + }, + ) + + grouped_functions = grouped_functions_by_root_name.get(name, []) + structured_functions = [ + fn + for fn in grouped_functions + if isinstance(fn, NativeFunctionsGroup) and fn.structured + ] + is_structured = len(structured_functions) > 0 + + if is_structured: + ops_fm.write_with_template( + f"{name}_meta.h", + "NativeMetaFunction.h", + lambda: { + "meta_function_declarations": list( + mapMaybe( + compute_meta_function_declaration, structured_functions + ) + ), + }, + ) + declarations = get_native_function_declarations( + grouped_native_functions=grouped_functions, + backend_indices=backend_indices, + native_function_decl_gen=dest.compute_native_function_declaration, + ) + ops_fm.write_with_template( + f"{name}_native.h", + "NativeFunction.h", + lambda: { + "extra_includes": ( + f"#include " if is_structured else [] + ), + "native_function_declarations": declarations, + }, + ) + + for category, suffix in [ + ("Functions", ""), + ("Operators", "_ops"), + ("NativeMetaFunctions", "_meta"), + ("NativeFunctions", "_native"), + ]: + cpu_fm.write( + f"{category}.h", + lambda: { + f"{category}_includes": [ + f"#include " + for name in sorted(functions_by_root_name.keys()) + ], + f"{category}_declarations": [], + }, + ) + + for dispatch_key in dispatch_keys: + if dispatch_key not in functions_keys: + continue + + dispatch_namespace = dispatch_key.lower() + dispatch_names = [] + + for name, functions in functions_by_root_name.items(): + grouped_functions = grouped_functions_by_root_name.get(name, []) + declarations = list( + concatMap( + dest.RegisterDispatchKey( + backend_indices[dispatch_key], + Target.NAMESPACED_DECLARATION, + selector, + rocm=rocm, + symint=True, + class_method_name=None, + skip_dispatcher_op_registration=False, + ), + grouped_functions, + ) + ) + + if len(declarations) == 0: + continue + + dispatch_names.append(name) + ops_fm.write_with_template( + f"{name}_{dispatch_namespace}_dispatch.h", + "DispatchKeyFunction.h", + lambda: { + "dispatch_namespace": dispatch_namespace, + "dispatch_namespaced_declarations": declarations, + }, + ) + + fm = cuda_fm if is_cuda_dispatch_key(dispatch_key) else cpu_fm + inl_headers = f"#include " + + fm.write_with_template( + f"{dispatch_key}Functions.h", + "DispatchKeyFunctions.h", + lambda: { + "dispatch_key": str(dispatch_key), + "inline_headers": inl_headers, + }, + ) + fm.write_with_template( + f"{dispatch_key}Functions_inl.h", + "DispatchKeyFunctions_inl.h", + lambda: { + "dispatch_namespace": dispatch_namespace, + "DispatchKeyFunctions_inl_includes": [ + f"#include " + for name in sorted(dispatch_names) + ], + "dispatch_namespaced_declarations": [], + }, + ) + del fm + + cpu_fm.write( + "MethodOperators.h", + lambda: { + "MethodOperators_includes": sorted( + f"#include " + for name, functions in functions_by_root_name.items() + if any(Variant.method in fn.variants for fn in functions) + ), + "MethodOperators_declarations": [], + }, + ) + + +def gen_headers( + *, + native_functions: Sequence[NativeFunction], + valid_tags: Set[str], + grouped_native_functions: Sequence[Union[NativeFunction, NativeFunctionsGroup]], + structured_native_functions: Sequence[NativeFunctionsGroup], + static_dispatch_idx: List[BackendIndex], + selector: SelectiveBuilder, + backend_indices: Dict[DispatchKey, BackendIndex], + core_fm: FileManager, + cpu_fm: FileManager, + cuda_fm: FileManager, + ops_fm: FileManager, + dispatch_keys: Sequence[DispatchKey], + functions_keys: Set[DispatchKey], + rocm: bool, + per_operator_headers: bool, +) -> None: + if per_operator_headers: + gen_per_operator_headers( + native_functions=native_functions, + grouped_native_functions=grouped_native_functions, + static_dispatch_idx=static_dispatch_idx, + selector=selector, + backend_indices=backend_indices, + cpu_fm=cpu_fm, + cuda_fm=cuda_fm, + ops_fm=ops_fm, + dispatch_keys=dispatch_keys, + functions_keys=functions_keys, + rocm=rocm, + ) + else: + gen_aggregated_headers( + native_functions=native_functions, + grouped_native_functions=grouped_native_functions, + structured_native_functions=structured_native_functions, + static_dispatch_idx=static_dispatch_idx, + selector=selector, + backend_indices=backend_indices, + cpu_fm=cpu_fm, + cuda_fm=cuda_fm, + dispatch_keys=dispatch_keys, + functions_keys=functions_keys, + rocm=rocm, + ) + + core_fm.write( + "TensorBody.h", + lambda: { + "tensor_method_declarations": list( + mapMaybe( + ComputeTensorMethod( + target=Target.DECLARATION, + static_dispatch_backend_indices=static_dispatch_idx, + ), + native_functions, + ) + ), + "tensor_method_definitions": list( + mapMaybe( + ComputeTensorMethod( + target=Target.DEFINITION, + static_dispatch_backend_indices=static_dispatch_idx, + ), + native_functions, + ) + ), + }, + ) + + cpu_fm.write( + "RedispatchFunctions.h", + lambda: { + "function_redispatch_definitions": list( + mapMaybe(ComputeRedispatchFunction(), native_functions) + ), + }, + ) + + cpu_fm.write( + "RegistrationDeclarations.h", + lambda: { + "registration_declarations": [ + compute_registration_declarations(f, backend_indices) + for f in native_functions + ], + }, + ) + + cpu_fm.write( + "VmapGeneratedPlumbing.h", lambda: gen_all_vmap_plumbing(native_functions) + ) + + def gen_aten_interned_strings() -> Dict[str, str]: + attrs = set() # All function argument names + names = set() # All ATen function names + for func in native_functions: + names.add(str(func.func.name.name)) + # Some operators don't have a functional variant but we still create a + # symbol without the underscore + names.add(func.func.name.name.base) + + for arg in func.func.schema_order_arguments(): + attrs.add(arg.name) + + # These are keywords in C++, so aren't valid symbol names + # https://en.cppreference.com/w/cpp/language/operator_alternative + names -= { + "and", + "and_eq", + "bitand", + "bitor", + "compl", + "not", + "not_eq", + "or", + "or_eq", + "xor", + "xor_eq", + } + + return { + "aten_symbols": " \\\n".join( + [f"_(aten, {name})" for name in sorted(names)] + ), + "attr_symbols": " \\\n".join( + [f"_(attr, {name})" for name in sorted(attrs)] + ), + } + + core_fm.write("aten_interned_strings.h", gen_aten_interned_strings) + + def gen_tags_enum() -> Dict[str, str]: + return {"enum_of_valid_tags": (",\n".join(sorted(valid_tags)))} + + core_fm.write("enum_tag.h", gen_tags_enum) + + +def gen_source_files( + *, + native_functions: Sequence[NativeFunction], + grouped_native_functions: Sequence[Union[NativeFunction, NativeFunctionsGroup]], + structured_native_functions: Sequence[NativeFunctionsGroup], + view_groups: Sequence[NativeFunctionsViewGroup], + selector: SelectiveBuilder, + static_dispatch_idx: List[BackendIndex], + backend_indices: Dict[DispatchKey, BackendIndex], + aoti_fm: FileManager, + core_fm: FileManager, + cpu_fm: FileManager, + cpu_vec_fm: FileManager, + cuda_fm: FileManager, + dispatch_keys: Sequence[DispatchKey], + functions_keys: Set[DispatchKey], + rocm: bool, + force_schema_registration: bool, + per_operator_headers: bool, + skip_dispatcher_op_registration: bool, +) -> None: + extra_cuda_headers = """\ +#include +#include +#include +#include """ + if rocm: + extra_cuda_headers = """\ +#include +#include +#include +#include """ + + for dispatch_key in dispatch_keys: + fm = cuda_fm if is_cuda_dispatch_key(dispatch_key) else cpu_fm + + if per_operator_headers: + + def operator_headers() -> List[str]: + headers = [] + for g in grouped_native_functions: + is_registered = False + if backend_index.has_kernel(g): + is_registered = True + # The above has_kernel test on a group will only test for + # the existence of out dispatch, because that's how + # structured kernels work. But sometimes functions can be + # grouped but not be structured, and then you need to check + # each individual piece, as they may have manual dispatch + # entries. + elif isinstance(g, NativeFunctionsGroup) and any( + backend_index.has_kernel(fn) for fn in g.functions() + ): + is_registered = True + # TODO: this condition is a bit questionable + # (It has to do with the fact that structured kernels get generated kernels + # to the Meta + CompositeExplicitAutogradNonFunctional keys). + elif g.structured and dispatch_key in ( + DispatchKey.Meta, + DispatchKey.CompositeExplicitAutogradNonFunctional, + ): + is_registered = True + if not is_registered: + continue + + headers.append(f"#include ") + if ( + dispatch_key + == DispatchKey.CompositeExplicitAutogradNonFunctional + ): + headers.append(f"#include ") + if dispatch_key in functions_keys: + headers.append( + f"#include " + ) + + return sorted(set(headers)) + + else: + + def operator_headers() -> List[str]: + headers = ["#include "] + if dispatch_key == DispatchKey.CompositeExplicitAutogradNonFunctional: + headers.append("#include ") + if dispatch_key in functions_keys: + headers.append(f"#include ") + return headers + + backend_index = backend_indices[dispatch_key] + ns_grouped_native_functions = defaultdict(list) + for grouped_native_function in grouped_native_functions: + namespace = ( + grouped_native_function.namespace + if isinstance(grouped_native_function, NativeFunction) + else grouped_native_function.functional.namespace + ) + ns_grouped_native_functions[namespace].append(grouped_native_function) + + dispatch_namespace = str(dispatch_key).lower() + + # CompositeImplicitAutogradNestdTensor does not currently user the helpers generated + # compilation will fail when `-Werror=unused-function` flag is set + gen_dispatch_helpers: bool = ( + dispatch_key != DispatchKey.CompositeImplicitAutogradNestedTensor + ) + + dispatch_definitions = get_native_function_definitions( + fm=fm, + grouped_native_functions=grouped_native_functions, + dispatch_key=dispatch_key, + backend_idx=backend_index, + selector=selector, + rocm=rocm, + symint=True, + skip_dispatcher_op_registration=skip_dispatcher_op_registration, + gen_dispatch_helpers=gen_dispatch_helpers, + ) + fm.write_with_template( + f"Register{dispatch_key}.cpp", + "RegisterDispatchKey.cpp", + lambda: { + "extra_cuda_headers": extra_cuda_headers + if is_cuda_dispatch_key(dispatch_key) + else "", + "external_backend_headers": "", + "dispatch_headers": dest.gen_registration_headers( + backend_index, per_operator_headers, rocm + ), + "ops_headers": operator_headers(), + "dispatch_helpers": "", + "dispatch_definitions": dispatch_definitions, + }, + ) + + for g in structured_native_functions: + if not g.out.ufunc_inner_loop or not is_ufunc_dispatch_key(dispatch_key): + continue + name = g.functional.func.name.name + if dispatch_key is DispatchKey.CPU: + assert fm is cpu_fm + fm.write_with_template( + f"UfuncCPU_{name}.cpp", + "UfuncCPU.cpp", + lambda: { + "meta_declaration": compute_meta_function_declaration(g), + "native_declaration": dest.compute_native_function_declaration( + g, backend_indices[dispatch_key] + ), + "native_definitions": dest.compute_ufunc_cpu(g), + }, + ) + cpu_vec_fm.write_with_template( + f"UfuncCPUKernel_{name}.cpp", + "UfuncCPUKernel.cpp", + lambda: { + "name": name, + "native_definitions": dest.compute_ufunc_cpu_kernel(g), + }, + ) + elif dispatch_key is DispatchKey.CUDA: + cuda_headers = "#include " + if rocm: + cuda_headers = "#include " + fm.write_with_template( + f"UfuncCUDA_{name}.cu", + "UfuncCUDA.cu", + lambda: { + "name": name, + "cuda_headers": cuda_headers, + "meta_declaration": compute_meta_function_declaration(g), + "native_declaration": dest.compute_native_function_declaration( + g, backend_indices[dispatch_key] + ), + "native_definitions": dest.compute_ufunc_cuda(g), + }, + ) + else: + raise AssertionError(f"unrecognized {dispatch_key} for ufunc") + + if dispatch_key in (DispatchKey.CPU, DispatchKey.CUDA): + + def get_header( + f: NativeFunction, + ) -> Optional[str]: + backend_index = get_backend_index_for_aoti( + f, dispatch_key, backend_indices + ) + return ( + None + if backend_index is None + else f"#include " + ) + + def headers_for_aoti() -> str: + headers = [] + for g in grouped_native_functions: + if isinstance(g, NativeFunctionsGroup): + for f in g.functions(): + # some variants are registered in the backend, but some are registered as CompositeExplicitAutograd + header = get_header(f) + if header is not None: + headers.append(header) + else: + header = get_header(g) + if header is not None: + headers.append(header) + return "\n".join(sorted(set(headers))) + + extra_headers = ( + extra_cuda_headers if is_cuda_dispatch_key(dispatch_key) else "" + ) + + aoti_fm.write( + f"c_shim_{dispatch_key.lower()}.h", + lambda: gen_aoti_c_shim( + native_functions, + dispatch_key, + backend_indices, + header=True, + includes="", + ), + ) + aoti_fm.write( + f"c_shim_{dispatch_key.lower()}.cpp", + lambda: gen_aoti_c_shim( + native_functions, + dispatch_key, + backend_indices, + header=False, + includes=headers_for_aoti() + "\n" + extra_headers, + ), + ) + + del fm + + # BackendSelect is generated specially + def gen_backend_select() -> Dict[str, List[str]]: + relevant_fns = [ + fn for fn in native_functions if needs_backend_select(fn, selector) + ] + return { + "ops_headers": [ + f"#include " for fn in relevant_fns + ], + "backend_select_method_definitions": list( + mapMaybe( + ComputeBackendSelect(Target.DEFINITION, selector), relevant_fns + ) + ), + "backend_select_function_registrations": list( + mapMaybe( + ComputeBackendSelect(Target.REGISTRATION, selector), relevant_fns + ) + ), + } + + cpu_fm.write("RegisterBackendSelect.cpp", gen_backend_select) + + schema_selector = selector + if force_schema_registration: + schema_selector = SelectiveBuilder.get_nop_selector() + + ( + aten_schema_registrations, + schema_registrations, + ) = get_native_function_schema_registrations( + native_functions=native_functions, schema_selector=schema_selector + ) + cpu_fm.write( + "RegisterSchema.cpp", + lambda: { + "aten_schema_registrations": [] + if skip_dispatcher_op_registration + else aten_schema_registrations, + "schema_registrations": [] + if skip_dispatcher_op_registration + else schema_registrations, + }, + ) + + def key_func( + fn: Union[NativeFunction, NativeFunctionsGroup, NativeFunctionsViewGroup] + ) -> str: + return fn.root_name + + cpu_fm.write_sharded( + "Operators.cpp", + native_functions, + key_fn=key_func, + env_callable=lambda fn: { + "operator_headers": [f"#include "], + "definitions": [ + ComputeOperators( + Target.DEFINITION, + static_dispatch_backend_indices=static_dispatch_idx, + )(fn) + ], + }, + base_env={ + "static_dispatch_extra_headers": static_dispatch_extra_headers( + static_dispatch_idx + ), + }, + num_shards=5, + sharded_keys={ + "operator_headers", + "definitions", + "static_dispatch_extra_headers", + }, + ) + + cpu_fm.write("Functions.cpp", dict) + + core_fm.write("TensorMethods.cpp", dict) + + core_fm.write( + "ATenOpList.cpp", + lambda: { + "aten_ops": list(mapMaybe(compute_aten_op, native_functions)), + }, + ) + + def functionalization_env_callable( + g: Union[NativeFunction, NativeFunctionsGroup, NativeFunctionsViewGroup] + ) -> Dict[str, List[str]]: + def gen_op_headers( + g: Union[NativeFunction, NativeFunctionsGroup, NativeFunctionsViewGroup] + ) -> List[str]: + if isinstance(g, NativeFunctionsViewGroup): + # view ops always get a functionalization kernel + headers = [ + f"#include ", + f"#include ", + ] + if g.view_copy is not None: + headers += [ + f"#include ", + f"#include ", + ] + return headers + elif isinstance(g, NativeFunctionsGroup): + headers = [ + f"#include ", + f"#include ", + f"#include ", + f"#include ", + ] + if g.inplace is not None: + headers += [ + f"#include ", + f"#include ", + ] + if g.mutable is not None: + headers += [ + f"#include ", + f"#include ", + ] + return headers + else: + return [ + f"#include ", + f"#include ", + ] + + return { + "ops_headers": gen_op_headers(g), + "func_definitions": gen_functionalization_definition( + selector, + g, + ), + "func_registrations": gen_functionalization_registration( + selector, + g, + backend_indices[DispatchKey.CompositeImplicitAutograd], + ), + } + + all_groups: List[ + Union[NativeFunction, NativeFunctionsGroup, NativeFunctionsViewGroup] + ] = list(structured_native_functions) + list( + view_groups # type: ignore[assignment, arg-type, operator] + ) + # Note: all operators that functionalization needs to handle (mutable and aliasing ops) should be grouped properly. + # The only reason we really need to deal with direct NativeFunctions here (instead of the groups) is because: + # (1) We can provide better error checking (error out if someone introduces a mutable op that doesn't obey the grouping logic) + # (2) functionalization needs to manually register CompositeImplicitAutograd kernels, which might not be grouped. + # Although this could go away long-term if we add a dedicated dispatch key for decompositions. + structured_map: Dict[OperatorName, NativeFunction] = { + f.func.name: f + for f in concatMap(lambda g: list(g.functions()), structured_native_functions) + } + view_map: Dict[OperatorName, NativeFunction] = { + f.func.name: f for f in concatMap(lambda g: list(g.functions()), view_groups) + } + for f in native_functions: + if f.func.name not in structured_map and f.func.name not in view_map: + all_groups.append(f) + + cpu_fm.write_sharded( + "RegisterFunctionalization.cpp", + all_groups, + key_fn=key_func, + env_callable=functionalization_env_callable, + num_shards=4, + sharded_keys={ + "ops_headers", + "func_definitions", + "func_registrations", + "func_add_back_views_definitions", + "func_add_back_views_registrations", + }, + ) + + cpu_fm.write( + "FunctionalInverses.h", + lambda: { + "view_inverse_declarations": list( + mapMaybe( + lambda g: gen_functionalization_view_inverse_declaration( + selector, g + ), + view_groups, + ) + ) + }, + ) + + # Note [view_copy NativeFunctions] + # Every view operator in native_functions.yaml that is not CompositeImplicitAutograd + # needs to have a corresponding non-aliasing {view}_copy variant. + # Backends that use functionalization and don't know how to handle aliasing ops + # are expected to implement kernels for these {view}_copy kernels instead. + # The code for {view}_copy operators in core is pretty boilerplate-heavy however, + # so we codegen the following: + # (1) A CompositeExplicitAutogradNonFunctional kernel for every {view}_copy operator. + # These are never explicitly invoked by the functionalization pass, + # but they could theoretically be called from user code (I added these kernels for completeness, + # since the ops are part of the public API). + # (2) A derivative formula for every {view}_copy operator + # {view}_copy operators can re-use the same derivative formulas as their {view} op counterparts, + # so rather than stamping all of the entries out in derivatives.yaml, + # we codegen them in. + # This is similar to how autograd codegen doesn't require inplace ops to have a derivatives.yaml entry. + cpu_fm.write( + "CompositeViewCopyKernels.cpp", + lambda: { + "ops_headers": [ + "\n".join( + f"#include \n" + # NB: this include is important as it ensures we + # set the visibility on generated view_copy kernels + # correctly + f"#include " + for f in ( + [g.view] if g.view_copy is None else [g.view, g.view_copy] + ) + ) + for g in view_groups + ] + + [ + "\n".join( + f"#include " + for f in [g.inplace, g.mutable, g.functional] + if f is not None and "generated" not in f.tags + ) + for g in structured_native_functions + ], + "CompositeViewCopyKernel_Definitions": list( + mapMaybe( + GenCompositeViewCopyKernel( + backend_indices[ + DispatchKey.CompositeExplicitAutogradNonFunctional + ] + ), + view_groups, + ) + ), + "GeneratedCompositeFunctional_Definitions": list( + mapMaybe( + gen_composite_functional_kernel, + structured_native_functions, + ) + ), + "GeneratedCompositeOut_Definitions": list( + mapMaybe( + gen_composite_out_kernel, + structured_native_functions, + ) + ), + }, + ) + + +def gen_declarations_yaml( + cpu_fm: FileManager, native_functions: Sequence[NativeFunction] +) -> None: + cpu_fm.write( + "Declarations.yaml", + lambda: format_yaml([compute_declaration_yaml(f) for f in native_functions]), + ) + + +def get_torchgen_root() -> pathlib.Path: + """ + If you're depending on torchgen out-of-tree, you can use the root to figure + out the path to native_functions.yaml + """ + return pathlib.Path(__file__).parent.resolve() + + +def main() -> None: + parser = argparse.ArgumentParser(description="Generate ATen source files") + parser.add_argument( + "-s", + "--source-path", + help="path to source directory for ATen", + default="aten/src/ATen", + ) + parser.add_argument( + "-o", + "--output-dependencies", + help="output a list of dependencies into the given file and exit", + ) + parser.add_argument( + "--dry-run", + action="store_true", + help="run without writing any files (still updates outputs)", + ) + parser.add_argument( + "--per-operator-headers", + action="store_true", + help="generate separate headers per operator in ATen/ops", + ) + parser.add_argument( + "-d", + "--install-dir", + "--install_dir", + help="output directory", + default="build/aten/src/ATen", + ) + parser.add_argument( + "--rocm", + action="store_true", + help="reinterpret CUDA as ROCm/HIP and adjust filepaths accordingly", + ) + parser.add_argument( + "--mps", + action="store_true", + help="Generate MPS registration code when set", + ) + # TODO: --op-registration-whitelist will be removed when all call-sites + # for gen.py are moved over to using the operator YAML file for mobile + # custom build. + parser.add_argument( + "--op-registration-whitelist", + "--op_registration_whitelist", + nargs="*", + help="filter op registrations by the whitelist (if set); " + "each item is `namespace`::`operator name` without overload name; " + "e.g.: aten::empty aten::conv2d ...", + ) + parser.add_argument( + "--op-selection-yaml-path", + "--op_selection_yaml_path", + help="Provide a path to the operator selection (for custom build) YAML " + "that contains the information about the set of selected operators " + "and their categories (training, ...). Each operator is either a " + "full operator name with overload or just a bare operator name. " + "The operator names also contain the namespace prefix (e.g. aten::)", + ) + parser.add_argument( + "--backend-whitelist", + "--backend_whitelist", + nargs="*", + help="filter dispatch backend by the whitelist (if set), " + "e.g.: CPU CUDA QuantizedCPU ...", + ) + parser.add_argument( + "--static-dispatch-backend", + "--static_dispatch_backend", + nargs="*", + help="generate static dispatch code for the specific backend (if set)", + ) + parser.add_argument( + "--skip-dispatcher-op-registration", + "--skip_dispatcher_op_registration", + action="store_true", + help="Avoid registering operators into the dispatcher.", + ) + parser.add_argument( + "--force-schema-registration", + "--force_schema_registration", + action="store_true", + help="force it to generate schema-only registrations for all ops, including" + "those that are not listed on --op-registration-whitelist", + ) + parser.add_argument( + "--generate", + type=str, + nargs="*", + choices=["headers", "sources", "declarations_yaml"], + default=["headers", "sources", "declarations_yaml"], + help="Generate only a subset of files", + ) + + options = parser.parse_args() + + selector = get_custom_build_selector( + options.op_registration_whitelist, + options.op_selection_yaml_path, + ) + + native_yaml_path = os.path.join(options.source_path, "native/native_functions.yaml") + tags_yaml_path = os.path.join(options.source_path, "native/tags.yaml") + + from torchgen.model import dispatch_keys + + # TODO: stop generating CUDA kernels for non-CUDA builds + ignore_keys = set() + if not options.mps: + ignore_keys.add(DispatchKey.MPS) + + if DispatchKey.MPS in dispatch_keys: + del dispatch_keys[dispatch_keys.index(DispatchKey.MPS)] + + parsed_yaml = parse_native_yaml(native_yaml_path, tags_yaml_path, ignore_keys) + valid_tags = _GLOBAL_PARSE_TAGS_YAML_CACHE[tags_yaml_path] + native_functions, backend_indices = ( + parsed_yaml.native_functions, + parsed_yaml.backend_indices, + ) + + grouped_native_functions = get_grouped_native_functions(native_functions) + + structured_native_functions = [ + g for g in grouped_native_functions if isinstance(g, NativeFunctionsGroup) + ] + native_functions_with_view_groups = get_grouped_by_view_native_functions( + native_functions + ) + view_groups = [ + g + for g in native_functions_with_view_groups + if isinstance(g, NativeFunctionsViewGroup) + ] + + # NB: It is mandatory to NOT use os.path.join here, as the install directory + # will eventually be ingested by cmake, which does not respect Windows style + # path slashes. If you switch this to use os.path.join, you'll get an error + # like: + # + # Syntax error in cmake code when parsing string + # + # C:/Jenkins/workspace/pytorch-builds/pytorch-win-ws2016-cuda9-cudnn7-py3-build/build/aten/src/ATen\core/TensorMethods.h + # + # Invalid character escape '\c'. + core_install_dir = f"{options.install_dir}/core" + pathlib.Path(core_install_dir).mkdir(parents=True, exist_ok=True) + ops_install_dir = f"{options.install_dir}/ops" + pathlib.Path(ops_install_dir).mkdir(parents=True, exist_ok=True) + + core_fm = make_file_manager(options=options, install_dir=core_install_dir) + cpu_fm = make_file_manager(options=options) + cpu_vec_fm = make_file_manager(options=options) + cuda_fm = make_file_manager(options=options) + ops_fm = make_file_manager(options=options, install_dir=ops_install_dir) + aoti_fm = make_file_manager( + options=options, install_dir="torch/csrc/inductor/aoti_torch/generated" + ) + + # Only a limited set of dispatch keys get CPUFunctions.h headers generated + # for them; this is the set + functions_keys = { + DispatchKey.CPU, + DispatchKey.CUDA, + DispatchKey.CompositeImplicitAutograd, + DispatchKey.CompositeImplicitAutogradNestedTensor, + DispatchKey.CompositeExplicitAutograd, + DispatchKey.CompositeExplicitAutogradNonFunctional, + DispatchKey.Meta, + } + if options.mps: + functions_keys.add(DispatchKey.MPS) + + if options.backend_whitelist: + dispatch_keys = [ + k + for k in dispatch_keys + if is_generic_dispatch_key(k) or str(k) in options.backend_whitelist + ] + + static_dispatch_idx: List[BackendIndex] = [] + if options.static_dispatch_backend: + static_dispatch_idx = [ + backend_indices[DispatchKey.parse(key)] + for key in options.static_dispatch_backend + ] + for key in options.static_dispatch_backend: + dp_key = DispatchKey.parse(key) + if dp_key not in functions_keys: + functions_keys.add(dp_key) + + if "sources" in options.generate: + gen_source_files( + native_functions=native_functions, + grouped_native_functions=grouped_native_functions, + structured_native_functions=structured_native_functions, + view_groups=view_groups, + selector=selector, + static_dispatch_idx=static_dispatch_idx, + backend_indices=backend_indices, + aoti_fm=aoti_fm, + core_fm=core_fm, + cpu_fm=cpu_fm, + cpu_vec_fm=cpu_vec_fm, + cuda_fm=cuda_fm, + dispatch_keys=dispatch_keys, + functions_keys=functions_keys, + rocm=options.rocm, + force_schema_registration=options.force_schema_registration, + per_operator_headers=options.per_operator_headers, + skip_dispatcher_op_registration=options.skip_dispatcher_op_registration, + ) + + if "headers" in options.generate: + gen_headers( + native_functions=native_functions, + valid_tags=valid_tags, + grouped_native_functions=grouped_native_functions, + structured_native_functions=structured_native_functions, + static_dispatch_idx=static_dispatch_idx, + selector=selector, + backend_indices=backend_indices, + core_fm=core_fm, + cpu_fm=cpu_fm, + cuda_fm=cuda_fm, + ops_fm=ops_fm, + dispatch_keys=dispatch_keys, + functions_keys=functions_keys, + rocm=options.rocm, + per_operator_headers=options.per_operator_headers, + ) + + if "declarations_yaml" in options.generate: + gen_declarations_yaml(native_functions=native_functions, cpu_fm=cpu_fm) + + if options.output_dependencies: + depfile_path = pathlib.Path(options.output_dependencies).resolve() + depfile_name = depfile_path.name + depfile_stem = depfile_path.stem + + for fm, prefix in [ + (cpu_fm, ""), + (cpu_vec_fm, "cpu_vec_"), + (core_fm, "core_"), + (cuda_fm, "cuda_"), + (ops_fm, "ops_"), + ]: + varname = prefix + depfile_stem + path = depfile_path.parent / (prefix + depfile_name) + fm.write_outputs(varname, str(path)) + + +if __name__ == "__main__": + main()