test_pytorch_onnx_no_runtime.py

# Owner(s): ["module: onnx"]

"""Tests for onnx export that don't run the exported model."""

import contextlib
import io
import itertools
import unittest
import unittest.mock
import warnings
from typing import Callable, Dict, Iterable, List, Optional, Tuple, Union

import numpy as np
import onnx
import onnx.numpy_helper
import pytorch_test_common

import torch
import torch.nn.functional as F
from torch import Tensor
from torch.onnx import OperatorExportTypes, symbolic_helper, utils
from torch.onnx._globals import GLOBALS
from torch.onnx._internal import registration
from torch.testing._internal import common_quantization, common_utils, jit_utils


def export_to_onnx(
    model: Union[torch.nn.Module, torch.jit.ScriptFunction],
    input: Union[torch.Tensor, Tuple[torch.Tensor]],
    custom_ops: Optional[
        Iterable[
            Union[contextlib.AbstractContextManager, contextlib.ContextDecorator],
        ]
    ] = None,
    mocks: Optional[Iterable] = None,
    operator_export_type: torch.onnx.OperatorExportTypes = torch.onnx.OperatorExportTypes.ONNX,
    opset_version: int = GLOBALS.export_onnx_opset_version,
    **torch_onnx_export_kwargs,
) -> onnx.ModelProto:
    """Exports `model(input)` to ONNX and returns it.

    Custom operators and/or unittest patches can be used help reproducing specific behaviors.

    Args:
        model: model to export
        input: model input with same format as `torch.onnx.export(..,args,...)`
        custom_ops: list of custom operators to use during export
        mocks: list of mocks to use during export
        operator_export_type: export type as described by `torch.onnx.export(...operator_export_type,...)`
        opset_version: ONNX opset version as described by `torch.onnx.export(...opset_version,...)`
        torch_onnx_export_kwargs: extra torch.onnx.export kwargs arguments
    Returns:
        A valid ONNX model (`onnx.ModelProto`)
    """
    custom_ops = custom_ops or []
    mocks = mocks or []
    with contextlib.ExitStack() as stack:
        for ctx in itertools.chain(custom_ops, mocks):
            stack.enter_context(ctx)

        f = io.BytesIO()
        torch.onnx.export(
            model,
            input,
            f,
            operator_export_type=operator_export_type,
            opset_version=opset_version,
            **torch_onnx_export_kwargs,
        )

    # Validate ONNX graph before returning it
    onnx_model = onnx.load_from_string(f.getvalue())
    onnx.checker.check_model(onnx_model)
    return onnx_model


class TestONNXExport(pytorch_test_common.ExportTestCase):
    def test_fuse_addmm(self):
        class AddmmModel(torch.nn.Module):
            def forward(self, x):
                return torch.mm(x, x) + x

        x = torch.ones(3, 3)
        f = io.BytesIO()
        torch.onnx.export(AddmmModel(), x, f, verbose=False)

    def test_onnx_transpose_incomplete_tensor_type(self):
        # Smoke test to get us into the state where we are attempting to export
        # a transpose op, where the input is a TensorType without size information.
        # This would previously not work, since we would
        # take the size of the input and use the length of its sizes as the
        # number of dimensions in the permutation.
        class Foo(torch.jit.ScriptModule):
            @torch.jit.script_method
            def forward(self, x):
                return x.contiguous().transpose(0, 1).sum()

        class TraceMe(torch.nn.Module):
            def __init__(self):
                super(TraceMe, self).__init__()
                self.foo = Foo()

            def forward(self, x):
                return self.foo(x)

        tm = TraceMe()
        tm = torch.jit.trace(tm, torch.rand(3, 4))
        f = io.BytesIO()
        torch.onnx.export(tm, (torch.rand(3, 4),), f)

    def test_export_tensoroption_to(self):
        def foo(x):
            return x[0].clone().detach().cpu() + x

        traced = torch.jit.trace(foo, (torch.rand([2])))

        torch.onnx.export_to_pretty_string(traced, (torch.rand([2]),))

    def test_onnx_export_script_module(self):
        class ModuleToExport(torch.jit.ScriptModule):
            def __init__(self):
                super(ModuleToExport, self).__init__()

            @torch.jit.script_method
            def forward(self, x):
                y = x - x
                return x + x

        mte = ModuleToExport()
        torch.onnx.export_to_pretty_string(mte, (torch.zeros(1, 2, 3),), verbose=False)

    @common_utils.suppress_warnings
    def test_onnx_export_func_with_warnings(self):
        @torch.jit.script
        def func_with_warning(inp):
            return torch.nn.functional.sigmoid(inp)  # triggers a deprecation warning

        class WarningTest(torch.nn.Module):
            def __init__(self):
                super(WarningTest, self).__init__()

            def forward(self, x):
                return func_with_warning(x)

        # no exception
        torch.onnx.export_to_pretty_string(
            WarningTest(), torch.randn(42), verbose=False
        )

    def test_onnx_export_script_python_fail(self):
        class PythonModule(torch.jit.ScriptModule):
            def __init__(self):
                super(PythonModule, self).__init__()

            @torch.jit.ignore
            def forward(self, x):
                return torch.neg(x)

        class ModuleToExport(torch.jit.ScriptModule):
            def __init__(self):
                super(ModuleToExport, self).__init__()
                self.mod = PythonModule()

            @torch.jit.script_method
            def forward(self, x):
                y = self.mod(x)
                return y + y

        mte = ModuleToExport()
        f = io.BytesIO()
        with self.assertRaisesRegex(RuntimeError, "Couldn't export Python"):
            torch.onnx.export(mte, (torch.zeros(1, 2, 3),), f, verbose=False)

    def test_onnx_export_script_inline_trace(self):
        class ModuleToInline(torch.nn.Module):
            def __init__(self):
                super(ModuleToInline, self).__init__()

            def forward(self, x):
                return torch.neg(x)

        class ModuleToExport(torch.jit.ScriptModule):
            def __init__(self):
                super(ModuleToExport, self).__init__()
                self.mod = torch.jit.trace(ModuleToInline(), torch.zeros(1, 2, 3))

            @torch.jit.script_method
            def forward(self, x):
                y = self.mod(x)
                return y + y

        mte = ModuleToExport()
        torch.onnx.export_to_pretty_string(mte, (torch.zeros(1, 2, 3),), verbose=False)

    def test_onnx_export_script_inline_script(self):
        class ModuleToInline(torch.jit.ScriptModule):
            def __init__(self):
                super(ModuleToInline, self).__init__()

            @torch.jit.script_method
            def forward(self, x):
                return torch.neg(x)

        class ModuleToExport(torch.jit.ScriptModule):
            def __init__(self):
                super(ModuleToExport, self).__init__()
                self.mod = ModuleToInline()

            @torch.jit.script_method
            def forward(self, x):
                y = self.mod(x)
                return y + y

        mte = ModuleToExport()
        torch.onnx.export_to_pretty_string(mte, (torch.zeros(1, 2, 3),), verbose=False)

    def test_onnx_export_script_module_loop(self):
        class ModuleToExport(torch.jit.ScriptModule):
            def __init__(self):
                super(ModuleToExport, self).__init__()

            @torch.jit.script_method
            def forward(self, x):
                # test if we support end to end onnx export on loop and
                # nested loops with and without loop index
                for _ in range(5):
                    for i in range(3):
                        x = x + i
                return x

        mte = ModuleToExport()
        torch.onnx.export_to_pretty_string(mte, (torch.zeros(1, 2, 3),), verbose=False)

    @common_utils.suppress_warnings
    def test_onnx_export_script_truediv(self):
        class ModuleToExport(torch.jit.ScriptModule):
            def __init__(self):
                super(ModuleToExport, self).__init__()

            @torch.jit.script_method
            def forward(self, x):
                z = x.size(0) / 2
                return x + z

        mte = ModuleToExport()

        torch.onnx.export_to_pretty_string(
            mte, (torch.zeros(1, 2, 3, dtype=torch.float),), verbose=False
        )

    def test_onnx_export_script_non_alpha_add_sub(self):
        class ModuleToExport(torch.jit.ScriptModule):
            def __init__(self):
                super(ModuleToExport, self).__init__()

            @torch.jit.script_method
            def forward(self, x):
                bs = x.size(0) + 1
                return bs - 1

        mte = ModuleToExport()
        torch.onnx.export_to_pretty_string(mte, (torch.rand(3, 4),), verbose=False)

    def test_onnx_export_script_module_if(self):
        class ModuleToExport(torch.jit.ScriptModule):
            def __init__(self):
                super(ModuleToExport, self).__init__()

            @torch.jit.script_method
            def forward(self, x):
                if bool(torch.sum(x) > 0):
                    x = torch.neg(x)
                return x

        mte = ModuleToExport()
        torch.onnx.export_to_pretty_string(mte, (torch.zeros(1, 2, 3),), verbose=False)

    def test_onnx_export_script_inline_params(self):
        class ModuleToInline(torch.jit.ScriptModule):
            def __init__(self):
                super(ModuleToInline, self).__init__()
                self.m = torch.nn.Parameter(torch.ones(3, 3))
                self.unused = torch.nn.Parameter(torch.ones(1, 2, 3))

            @torch.jit.script_method
            def forward(self, x):
                return torch.mm(x, self.m)

        class ModuleToExport(torch.jit.ScriptModule):
            def __init__(self):
                super(ModuleToExport, self).__init__()
                self.mod = ModuleToInline()
                self.param = torch.nn.Parameter(torch.ones(3, 4))

            @torch.jit.script_method
            def forward(self, x):
                y = self.mod(x)
                return torch.mm(y, self.param)

        mte = ModuleToExport()
        result = mte(torch.zeros(2, 3))
        reference = torch.mm(
            torch.mm(torch.zeros(2, 3), torch.ones(3, 3)), torch.ones(3, 4)
        )
        self.assertEqual(result, reference)
        torch.onnx.export_to_pretty_string(mte, (torch.ones(2, 3),), verbose=False)

    def test_onnx_export_speculate(self):
        class Foo(torch.jit.ScriptModule):
            def __init__(self, m):
                super(Foo, self).__init__()
                self.m = m

            @torch.jit.script_method
            def forward(self, x):
                x += x
                # because we are testing if we emit `if` statement correctly
                # we cannot use `True` as the condition. Constant prop
                # would remove the `if` statements.
                c = torch.sum(x) > 4
                if bool(c):
                    if bool(c):
                        y = self.m(x)
                    else:
                        y = self.m(x)
                else:
                    y = self.m(x)
                return y

        linear = torch.jit.trace(
            torch.nn.Linear(10, 20).float(), torch.zeros(1, 10, dtype=torch.float)
        )

        @torch.jit.script
        def transpose(x):
            return x.t()

        f1 = Foo(transpose)
        f2 = Foo(linear)

        torch.onnx.export_to_pretty_string(f1, (torch.ones(1, 10, dtype=torch.float),))
        torch.onnx.export_to_pretty_string(f2, (torch.ones(1, 10, dtype=torch.float),))

    def test_onnx_export_shape_reshape(self):
        class Foo(torch.nn.Module):
            def forward(self, x):
                import torch.onnx.operators

                x = x.repeat(5, 1, 1)
                shape = torch.onnx.operators.shape_as_tensor(x)
                reshaped = torch.onnx.operators.reshape_from_tensor_shape(x, shape)
                return reshaped

        foo = torch.jit.trace(Foo(), torch.zeros(1, 2, 3))
        torch.onnx.export_to_pretty_string(foo, (torch.zeros(1, 2, 3)))

    def test_listconstruct_erasure(self):
        class FooMod(torch.nn.Module):
            def forward(self, x):
                mask = x < 0.0
                return x[mask]

        torch.onnx.export_to_pretty_string(
            FooMod(),
            (torch.rand(3, 4),),
            add_node_names=False,
            do_constant_folding=False,
            operator_export_type=torch.onnx.OperatorExportTypes.ONNX_ATEN_FALLBACK,
        )

    def test_export_dynamic_slice(self):
        class DynamicSliceExportMod(torch.jit.ScriptModule):
            @torch.jit.script_method
            def forward(self, x):
                retval = x[0]
                for i in range(x.size(1)):
                    retval += torch.sum(x[0:i], dim=0)
                return retval

        mod = DynamicSliceExportMod()

        input = torch.rand(3, 4, 5)

        torch.onnx.export_to_pretty_string(
            DynamicSliceExportMod(), (input,), opset_version=10
        )

    def test_export_dict(self):
        class DictModule(torch.nn.Module):
            def forward(self, x_in: torch.Tensor) -> Dict[str, torch.Tensor]:
                return {"test_key_out": x_in}

        x_in = torch.tensor(1)
        mod = DictModule()
        mod.train(False)

        torch.onnx.export_to_pretty_string(mod, (x_in,))

        with self.assertRaisesRegex(RuntimeError, r"DictConstruct.+is not supported."):
            torch.onnx.export_to_pretty_string(torch.jit.script(mod), (x_in,))

    def test_source_range_propagation(self):
        class ExpandingModule(torch.nn.Module):
            def __init__(self):
                super().__init__()
                # Will be expanded during ONNX export
                self.ln = torch.nn.LayerNorm([1])

            def forward(self, input):
                return self.ln(input)

        mod = ExpandingModule()

        graph, _, _ = utils._model_to_graph(
            mod,
            (torch.zeros(1),),
            operator_export_type=torch.onnx.OperatorExportTypes.ONNX,
        )

        # Ensure that every node in the graph has a valid source range
        for node in graph.nodes():
            self.assertTrue(node.sourceRange())

    @common_utils.skipIfCaffe2
    def test_clip_aten_fallback_due_exception(self):
        def bad_clamp(g, self, min, max):
            return symbolic_helper._onnx_unsupported("Bad boy!")

        class MyClip(torch.nn.Module):
            def forward(self, x):
                return torch.clamp(x, min=-0.5, max=0.5)

        onnx_model = export_to_onnx(
            MyClip(),
            torch.randn(3, 4, requires_grad=True),
            custom_ops=[
                common_utils.custom_op(
                    "aten::clamp", bad_clamp, GLOBALS.export_onnx_opset_version
                )
            ],
            operator_export_type=torch.onnx.OperatorExportTypes.ONNX_ATEN_FALLBACK,
        )
        self.assertAtenOp(onnx_model, "clamp", "Tensor")

    @common_utils.skipIfCaffe2
    def test_clip_aten_fallback_explicit_request(self):
        class MyClip(torch.nn.Module):
            def forward(self, x):
                return torch.clamp(x, min=-0.5, max=0.5)

        def break_is_registered_op_api(name):
            fake_missing_symbolics = {"aten::clamp"}
            if name in fake_missing_symbolics:
                return None
            return registration.registry.get_function_group(name)

        # Force missing symbolic for well-known op using a mock
        onnx_model = export_to_onnx(
            MyClip(),
            torch.randn(3, 4, requires_grad=True),
            mocks=[
                unittest.mock.patch(
                    "torch.onnx._internal.registration.registry.get_function_group",
                    side_effect=break_is_registered_op_api,
                )
            ],
            operator_export_type=torch.onnx.OperatorExportTypes.ONNX_ATEN_FALLBACK,
        )
        self.assertAtenOp(onnx_model, "clamp", "Tensor")

    def _helper_test_to_(self, cast_fn: Callable[[torch.Tensor], torch.Tensor]):
        """Helper to test aten::to(device) variants.

        `cast_fn` is converted into a `torch.jit.script`. It wraps `aten::to`
        during export to preventing the devices to be hard-coded.

        Needed by detectron2 after https://github.com/facebookresearch/detectron2/pull/4132/
        """
        cast_fn = torch.jit.script(cast_fn)
        onnx_model = export_to_onnx(cast_fn, torch.zeros([1, 3, 32, 32]))
        for n in onnx_model.graph.node:
            self.assertNotEqual(n.op_type, "To")
            self.assertNotEqual(n.op_type, "Cast")

    def test_to__cpu_string(self):
        def cast_cpu_string(src: torch.Tensor) -> torch.Tensor:
            return src.to("cpu")

        self._helper_test_to_(cast_cpu_string)

    def test_to__device_cpu_string(self):
        def cast_device_cpu_string(src: torch.Tensor) -> torch.Tensor:
            return src.to(device="cpu")

        self._helper_test_to_(cast_device_cpu_string)

    def test_script_custom_class_error(self):
        class BoxCoder:
            def __init__(self, bbox_xform_clip: float) -> None:
                self.bbox_xform_clip = bbox_xform_clip

            def decode(self, rel_codes: Tensor, boxes: List[Tensor]) -> Tensor:
                boxes = torch.cat(boxes, dim=0)
                pred_ctr_x = (
                    torch.clamp(rel_codes[:, 0::4], max=self.bbox_xform_clip)
                    * boxes[:, 2]
                )
                return pred_ctr_x

        class MyModule(torch.nn.Module):
            __annotations__ = {
                "box_coder": BoxCoder,
            }

            def __init__(self):
                super().__init__()
                self.box_coder = BoxCoder(1.4)

            def forward(self, box_regression: Tensor, proposals: List[Tensor]):
                return self.box_coder.decode(box_regression, proposals)

        model = torch.jit.script(MyModule())
        box_regression = torch.randn([4, 4])
        proposal = [torch.randn(2, 4), torch.randn(2, 4)]

        with self.assertRaises(RuntimeError) as cm:
            onnx_model = io.BytesIO()
            torch.onnx.export(
                model,
                (box_regression, proposal),
                onnx_model,
            )

    def test_initializer_sequence(self):
        class MyModule(torch.nn.Module):
            def __init__(self, input_size, hidden_size, num_classes):
                super().__init__()
                self.fc1 = torch.nn.Linear(input_size, hidden_size)
                self.relu = torch.nn.ReLU()
                self.fc2 = torch.nn.Linear(hidden_size, num_classes)

            def forward(self, x):
                out = self.fc1(x)
                out = self.relu(out)
                out = self.fc2(out)
                return out

        test_model = MyModule(3, 4, 10)
        state_dict_list = [k for (k, v) in test_model.state_dict().items()]
        named_params_list = [k for (k, v) in test_model.named_parameters()]

        x = torch.randn(32, 3)
        f = io.BytesIO()
        torch.onnx.export(test_model, (x,), f, do_constant_folding=False)
        loaded_model = onnx.load_from_string(f.getvalue())

        actual_list = [p.name for p in loaded_model.graph.initializer]
        assert actual_list == state_dict_list, (
            "Initializers' sequence is not as same as state_dict(). Expected: ("
            + ", ".join(state_dict_list)
            + "). Actual:("
            + ", ".join(actual_list)
            + ")."
        )
        assert actual_list == named_params_list, (
            "Initializers' sequence is not as same as named_parameters(). Expected: ("
            + ", ".join(named_params_list)
            + "). Actual:("
            + ", ".join(actual_list)
            + ")."
        )

    def test_initializer_sequence_script_model(self):
        def list_is_expected(short_list, long_list) -> bool:
            if len(short_list) > len(long_list):
                return False

            for i in range(len(short_list)):
                if short_list[i] not in long_list[i]:
                    return False

            return True

        def loop(x, y):
            for i in range(int(y)):
                x = x + i
            return x

        class MyModule(torch.nn.Module):
            def __init__(self, input_size, hidden_size, num_classes):
                super().__init__()
                self.fc1 = torch.nn.Linear(input_size, hidden_size)
                self.relu = torch.nn.ReLU()
                self.fc2 = torch.nn.Linear(hidden_size, num_classes)

            def forward(self, x, y):
                x = loop(x, y)
                out = self.fc1(x)
                out = self.relu(out)
                out = self.fc2(out)
                return out

        test_model = torch.jit.script(MyModule(3, 4, 10))
        state_dict_list = [k for (k, v) in test_model.state_dict().items()]
        named_params_list = [k for (k, v) in test_model.named_parameters()]

        x = torch.ones(2, 3, dtype=torch.float)
        y = torch.tensor(5, dtype=torch.long)
        f = io.BytesIO()

        torch.onnx.export(test_model, (x, y), f, do_constant_folding=False)
        loaded_model = onnx.load_from_string(f.getvalue())

        actual_list = [p.name for p in loaded_model.graph.initializer]
        assert list_is_expected(state_dict_list, actual_list), (
            "ScriptModel - Initializers' sequence is not as same as state_dict(). Expected: ("
            + ", ".join(state_dict_list)
            + "). Actual:("
            + ", ".join(actual_list)
            + ")."
        )
        assert list_is_expected(named_params_list, actual_list), (
            "ScriptModel - Initializers' sequence is not as same as named_parameters(). Expected: ("
            + ", ".join(named_params_list)
            + "). Actual:("
            + ", ".join(actual_list)
            + ")."
        )

    def test_onnx_checker_invalid_graph(self):
        class CustomAddModule(torch.nn.Module):
            def forward(self, x, y):
                return torch.add(x, y)

        def symbolic_custom_invalid_add(g, input, other, alpha=None):
            return g.op("Add", input, other, invalid_attr_i=1)

        torch.onnx.register_custom_op_symbolic(
            "::add", symbolic_custom_invalid_add, opset_version=9
        )

        x = torch.randn(2, 3, 4)
        y = torch.randn(2, 3, 4)

        test_model = CustomAddModule()
        f = io.BytesIO()

        try:
            with self.assertRaises(torch.onnx.errors.CheckerError):
                torch.onnx.export(test_model, (x, y), f, opset_version=9)
        finally:
            torch.onnx.unregister_custom_op_symbolic("::add", 9)

        self.assertTrue(f.getvalue(), "ONNX graph was not exported.")
        loaded_model = onnx.load_from_string(f.getvalue())

    def test_shape_value_map(self):
        class RSoftMax(torch.nn.Module):
            def __init__(self, radix, cardinality):
                super().__init__()
                self.radix = radix
                self.cardinality = cardinality

            def forward(self, x):
                batch = x.size(0)
                x = x.view(batch, self.cardinality, self.radix, -1).transpose(1, 2)
                x = F.softmax(x, dim=1)
                x = x.reshape(batch, -1)
                return x

        radix = 2
        cardinality = 1
        x = torch.randn(10, 1, 128, 1)
        f = io.BytesIO()
        torch.onnx.export(
            RSoftMax(radix, cardinality),
            (x,),
            f,
            input_names=["x"],
            dynamic_axes={"x": [0]},
        )
        loaded_model = onnx.load_from_string(f.getvalue())
        self.assertEqual(
            loaded_model.graph.output[0].type.tensor_type.shape.dim[1].dim_value, 128
        )

    def test_onnx_proto_checker(self):
        class Model(torch.nn.Module):
            def __init__(self):
                super().__init__()

            def forward(self, x):
                return 2 * x

        x = torch.randn(1, 2, 3, requires_grad=True)
        f = io.BytesIO()
        torch.onnx.export(Model(), x, f)
        model = onnx.load(f)
        model.ir_version = 0

        def check_proto():
            torch._C._check_onnx_proto(model.SerializeToString())

        self.assertRaises(RuntimeError, check_proto)

    def test_maintain_dynamic_shapes_of_unreliable_nodes(self):
        def symbolic_pythonop(ctx: torch.onnx.SymbolicContext, g, *args, **kwargs):
            return g.op("com.microsoft::PythonOp")

        torch.onnx.register_custom_op_symbolic("prim::PythonOp", symbolic_pythonop, 1)
        self.addCleanup(torch.onnx.unregister_custom_op_symbolic, "prim::PythonOp", 1)

        # necessay parameters for transformer embeddings
        hidden_size = 48
        max_position_embeddings = 32
        batch_size = 2

        # issue found that autograd.function making downstream
        # node unreliable but with static shape. The issue was first
        # discovered with using Apex FusedLayerNorm in Transformers
        class CustomLayerNorm(torch.autograd.Function):
            @staticmethod
            def forward(ctx, embedding):
                layer_norm = torch.nn.LayerNorm(hidden_size, eps=1e-12)
                return layer_norm(embedding)

        class EmbeddingModule(torch.nn.Module):
            def forward(
                self,
                embeddings=None,
            ):
                embedding_output = CustomLayerNorm.apply(embeddings)
                query = embedding_output.transpose(0, 1)
                target_len, batch_size, embedding_dim = query.size()
                # Reshape is used for consuming batch_size, and if it is static,
                # this will be a Constant node in the graph
                query = query.reshape(target_len, batch_size, embedding_dim)
                return query

        embeddings = torch.randn(batch_size, max_position_embeddings, hidden_size)

        f = io.BytesIO()
        torch.onnx.export(
            EmbeddingModule().eval(),
            (embeddings,),
            f,
            input_names=["embeddings"],
            dynamic_axes={
                "embeddings": {
                    0: "batch_size",
                    1: "max_position_embeddings",
                    2: "hidden_size",
                }
            },
            custom_opsets={"com.microsoft": 1},
        )
        model = onnx.load(io.BytesIO(f.getvalue()))

        # If there is a constant node with dim=3 and max_position_embeddings,
        # batch_size, hidden_size as shape, it means the shape becomes static.
        # Normally, with dynamic batch size, this constant node should not exist.
        const_node = [n for n in model.graph.node if n.op_type == "Constant"]
        self.assertNotEqual(len(const_node), 0)
        for node in const_node:
            for a in node.attribute:
                if a.name == "value":
                    shape = onnx.numpy_helper.to_array(a.t)
                    self.assertNotEqual(
                        shape.tolist(),
                        [max_position_embeddings, batch_size, hidden_size],
                    )

    def test_is_fp_for_C_TypeList(self):
        class M(torch.nn.Module):
            def forward(self, x):
                x = x.squeeze(1)
                w = x.shape[2]
                pos = x.view(2, -1).argmax(1)
                x_int = pos % w
                y_int = (pos - x_int) // w
                return y_int, x_int

        model = torch.jit.script(M())
        inputs = torch.randn(2, 4, 6)
        f = io.BytesIO()
        torch.onnx.export(
            model, inputs, f, dynamic_axes={"x": [0, 1]}, input_names=["x"]
        )

    def test_dropout_script(self):

        eg = torch.zeros(1, 2, 3, requires_grad=True)

        @jit_utils._trace(eg)
        def foo(x):
            x = torch.neg(x)
            return F.dropout(x)

        class MyDrop(torch.nn.Module):
            def forward(self, x):
                return foo(x)

        f = io.BytesIO()
        with warnings.catch_warnings(record=True):
            torch.onnx.export(MyDrop(), (eg,), f, verbose=False)

    def test_pack_padded_pad_packed_trace(self):
        from torch.nn.utils.rnn import pack_padded_sequence, pad_packed_sequence

        T, B, C = 3, 5, 7

        class PadPackedWrapper(torch.nn.Module):
            def __init__(self):
                super(PadPackedWrapper, self).__init__()

            def forward(self, x, seq_lens):
                x = pack_padded_sequence(x, seq_lens)
                x, _ = pad_packed_sequence(x)
                return x

        x = np.ones((T, B, C))
        seq_lens = np.array([3, 3, 2, 2, 1], dtype=np.int32)
        # set padding value so we can test equivalence
        for b in range(B):
            if seq_lens[b] < T:
                x[seq_lens[b] :, b, :] = 0
        seq_lens = torch.from_numpy(seq_lens)
        x = torch.autograd.Variable(torch.from_numpy(x), requires_grad=True)

        m = PadPackedWrapper()
        m_traced = torch.jit.trace(
            m,
            (
                x,
                seq_lens,
            ),
        )

        y = m(x, seq_lens)
        loss = torch.sum(y)
        loss.backward()
        grad = x.grad.clone()
        x.grad.zero_()

        y_traced = m_traced(x, seq_lens)
        loss_traced = torch.sum(y_traced)
        loss_traced.backward()
        grad_traced = x.grad.clone()

        self.assertEqual(y_traced, x)
        self.assertEqual(y_traced, y)
        self.assertEqual(grad, grad_traced)

        f = io.BytesIO()
        torch.onnx.export(m, (x, seq_lens), f, verbose=False)

    # Suppression: ONNX warns when exporting RNNs because of potential batch size mismatch.
    @common_utils.suppress_warnings
    def test_rnn_trace_override(self):
        from torch.nn.utils.rnn import pack_padded_sequence, pad_packed_sequence

        num_layers = 3
        T, B, C = 11, 5, 7

        class RNNTraceWrapper(torch.nn.Module):
            def __init__(self, cell_type):
                super(RNNTraceWrapper, self).__init__()
                if cell_type == "RNN":
                    self.rnn = torch.nn.RNN(
                        input_size=C, hidden_size=C, num_layers=num_layers
                    )
                elif cell_type == "LSTM":
                    self.rnn = torch.nn.LSTM(
                        input_size=C, hidden_size=C, num_layers=num_layers
                    )
                elif cell_type == "GRU":
                    self.rnn = torch.nn.GRU(
                        input_size=C, hidden_size=C, num_layers=num_layers
                    )

            def forward(self, x, seq_lens):
                x = pack_padded_sequence(x, seq_lens)
                x, _ = self.rnn(x)
                x, _ = pad_packed_sequence(x)
                return x

        for cell_type in ["RNN", "LSTM", "GRU"]:
            x = torch.ones(T, B, C, requires_grad=True)
            seq_lens = torch.from_numpy(np.array([11, 3, 2, 2, 1], dtype=np.int32))

            m = RNNTraceWrapper(cell_type)
            m_traced = torch.jit.trace(
                m,
                (
                    x,
                    seq_lens,
                ),
            )

            y = m(x, seq_lens)
            loss = torch.sum(y)
            loss.backward()
            grad = x.grad.clone()
            x.grad.zero_()

            y_traced = m_traced(x, seq_lens)
            loss_traced = torch.sum(y_traced)
            loss_traced.backward()
            grad_traced = x.grad.clone()

            self.assertEqual(y_traced, y)
            self.assertEqual(grad, grad_traced)

            f = io.BytesIO()
            torch.onnx.export(m, (x, seq_lens), f, verbose=False)

    def test_trace_fork_wait_inline_onnx(self):
        def fork_body(x):
            return torch.neg(x), torch.neg(x)

        class MyMod(torch.nn.Module):
            def forward(self, x):
                fut = torch.jit._fork(fork_body, x)
                val = torch.jit._wait(fut)
                return val[1]

        # smoke test for ONNX export
        f = io.BytesIO()
        torch.onnx.export(MyMod(), (torch.rand(3, 4),), f)

    def test_trace_detach_onnx_erase(self):
        class Mod(torch.nn.Module):
            def forward(self, x, w):
                return torch.matmul(x, w).detach()

        torch.onnx.export_to_pretty_string(Mod(), (torch.rand(3, 4), torch.rand(4, 5)))

    @common_utils.skipIfNoCaffe2
    def test_caffe2_aten_fallback_must_fallback(self):
        class ModelWithAtenNotONNXOp(torch.nn.Module):
            def forward(self, x, y):
                abcd = x + y
                defg = torch.linalg.qr(abcd)
                return defg

        # TODO: Refactor common_utils._decide_skip_caffe2 to support parametrize
        for operator_export_type in (
            OperatorExportTypes.ONNX_ATEN,
            OperatorExportTypes.ONNX_ATEN_FALLBACK,
        ):
            x = torch.rand(3, 4)
            y = torch.rand(3, 4)
            f = io.BytesIO()
            torch.onnx.export(
                ModelWithAtenNotONNXOp(),
                (x, y),
                f,
                do_constant_folding=False,
                operator_export_type=operator_export_type,
                # support for linalg.qr was added in later op set versions.
                opset_version=9,
            )
            onnx_model = onnx.load(io.BytesIO(f.getvalue()))
            self.assertAtenOp(onnx_model, "linalg_qr")

    @common_utils.skipIfNoCaffe2
    def test_caffe2_onnx_aten_must_not_fallback(self):
        class ModelWithAtenFmod(torch.nn.Module):
            def forward(self, x, y):
                return torch.fmod(x, y)

        # TODO: Refactor common_utils._decide_skip_caffe2 to support parametrize
        for operator_export_type in (
            OperatorExportTypes.ONNX_ATEN_FALLBACK,
            OperatorExportTypes.ONNX_ATEN,
        ):
            x = torch.randn(3, 4, dtype=torch.float32)
            y = torch.randn(3, 4, dtype=torch.float32)
            f = io.BytesIO()
            torch.onnx.export(
                ModelWithAtenFmod(),
                (x, y),
                f,
                do_constant_folding=False,
                operator_export_type=operator_export_type,
                opset_version=10,  # or higher
            )
            onnx_model = onnx.load(io.BytesIO(f.getvalue()))
            assert onnx_model.graph.node[0].op_type == "Mod"

    @common_utils.skipIfCaffe2
    def test_aten_fallback_must_fallback(self):
        class ModelWithAtenNotONNXOp(torch.nn.Module):
            def forward(self, x, y):
                abcd = x + y
                defg = torch.linalg.qr(abcd)
                return defg

        x = torch.rand(3, 4)
        y = torch.rand(3, 4)
        f = io.BytesIO()
        torch.onnx.export(
            ModelWithAtenNotONNXOp(),
            (x, y),
            f,
            do_constant_folding=False,
            operator_export_type=torch.onnx.OperatorExportTypes.ONNX_ATEN_FALLBACK,
            # support for linalg.qr was added in later op set versions.
            opset_version=9,
        )
        onnx_model = onnx.load(io.BytesIO(f.getvalue()))
        self.assertAtenOp(onnx_model, "linalg_qr")

    @common_utils.skipIfCaffe2
    def test_onnx_aten(self):
        class ModelWithAtenFmod(torch.nn.Module):
            def forward(self, x, y):
                return torch.fmod(x, y)

        x = torch.randn(3, 4, dtype=torch.float32)
        y = torch.randn(3, 4, dtype=torch.float32)
        f = io.BytesIO()
        torch.onnx.export(
            ModelWithAtenFmod(),
            (x, y),
            f,
            do_constant_folding=False,
            operator_export_type=torch.onnx.OperatorExportTypes.ONNX_ATEN,
        )
        onnx_model = onnx.load(io.BytesIO(f.getvalue()))
        self.assertAtenOp(onnx_model, "fmod", "Tensor")

    @common_utils.skipIfCaffe2
    def test_onnx_aten_fallback_must_not_fallback(self):
        # For BUILD_CAFFE2=0, aten fallback only when not exportable
        class ONNXExportable(torch.nn.Module):
            def __init__(self):
                super(ONNXExportable, self).__init__()
                self.quant = torch.quantization.QuantStub()
                self.fc1 = torch.nn.Linear(12, 8)
                self.fc2 = torch.nn.Linear(8, 4)
                self.fc3 = torch.nn.Linear(4, 6)
                self.dequant = torch.quantization.DeQuantStub()

            def forward(self, x):
                x = self.quant(x)
                x = x.view((-1, 12))
                h = F.relu(self.fc1(x))
                h = F.relu(self.fc2(h))
                h = F.relu(self.fc3(h))
                h = self.dequant(h)
                return h

        dummy_input = torch.randn(12)
        f = io.BytesIO()
        torch.onnx.export(
            ONNXExportable(),
            (dummy_input,),
            f,
            do_constant_folding=False,
            operator_export_type=torch.onnx.OperatorExportTypes.ONNX_ATEN_FALLBACK,
        )
        onnx_model = onnx.load(io.BytesIO(f.getvalue()))
        all_aten_nodes = [
            p
            for p in onnx_model.graph.node
            if p.op_type == "ATen" and p.domain == "org.pytorch.aten"
        ]
        self.assertEqual(len(all_aten_nodes), 0)


class TestQuantizeEagerONNXExport(common_utils.TestCase):
    def _test_lower_graph_impl(self, model, data):
        model.qconfig = torch.ao.quantization.default_qconfig
        model = torch.ao.quantization.prepare(model)
        model = torch.ao.quantization.convert(model)

        _ = model(data)
        input_names = ["x"]

        def _export_to_onnx(model, input, input_names):
            traced = torch.jit.trace(model, input)
            buf = io.BytesIO()
            torch.jit.save(traced, buf)
            buf.seek(0)

            model = torch.jit.load(buf)
            f = io.BytesIO()
            torch.onnx.export(
                model,
                input,
                f,
                input_names=input_names,
                operator_export_type=torch.onnx.OperatorExportTypes.ONNX_ATEN_FALLBACK,
                opset_version=9,
            )

        _export_to_onnx(model, data, input_names)

    @common_quantization.skipIfNoFBGEMM
    @common_utils.skipIfNoCaffe2
    def test_lower_graph_linear(self):
        model = torch.ao.quantization.QuantWrapper(
            torch.nn.Linear(5, 10, bias=True)
        ).to(dtype=torch.float)
        data_numpy = np.random.rand(1, 2, 5).astype(np.float32)
        data = torch.from_numpy(data_numpy).to(dtype=torch.float)
        self._test_lower_graph_impl(model, data)

    @common_quantization.skipIfNoFBGEMM
    @common_utils.skipIfNoCaffe2
    def test_lower_graph_conv2d(self):
        model = torch.ao.quantization.QuantWrapper(
            torch.nn.Conv2d(3, 5, 2, bias=True)
        ).to(dtype=torch.float)
        data_numpy = np.random.rand(1, 3, 6, 6).astype(np.float32)
        data = torch.from_numpy(data_numpy).to(dtype=torch.float)
        self._test_lower_graph_impl(model, data)

    @common_quantization.skipIfNoFBGEMM
    @unittest.skip(
        "onnx opset9 does not support quantize_per_tensor and caffe2 \
    does not support conv3d"
    )
    def test_lower_graph_conv3d(self):
        model = torch.ao.quantization.QuantWrapper(
            torch.nn.Conv3d(3, 5, 2, bias=True)
        ).to(dtype=torch.float)
        data_numpy = np.random.rand(1, 3, 6, 6, 6).astype(np.float32)
        data = torch.from_numpy(data_numpy).to(dtype=torch.float)
        self._test_lower_graph_impl(model, data)


if __name__ == "__main__":
    common_utils.run_tests()