Allow partial shape information in `SpecifyShape` `Op`

aesara/link/jax/dispatch.py

@@ -335,7 +335,7 @@ def jax_funcify_Shape_i(op, **kwargs):
 
 @jax_funcify.register(SpecifyShape)
 def jax_funcify_SpecifyShape(op, **kwargs):
-    def specifyshape(x, shape):
+    def specifyshape(x, *shape):
         assert x.ndim == len(shape)
         assert jnp.all(x.shape == tuple(shape)), (
             "got shape",

aesara/link/numba/dispatch/basic.py

@@ -2,6 +2,7 @@ import operator
 import warnings
 from contextlib import contextmanager
 from functools import singledispatch
+from textwrap import dedent
 
 import numba
 import numba.np.unsafe.ndarray as numba_ndarray
@@ -40,7 +41,7 @@ from aesara.tensor.subtensor import (
     Subtensor,
 )
 from aesara.tensor.type import TensorType
-from aesara.tensor.type_other import MakeSlice
+from aesara.tensor.type_other import MakeSlice, NoneConst
 
 
 def numba_njit(*args, **kwargs):
@@ -609,13 +610,28 @@ def numba_funcify_Reshape(op, **kwargs):
 
 
 @numba_funcify.register(SpecifyShape)
-def numba_funcify_SpecifyShape(op, **kwargs):
-    @numba_njit
-    def specifyshape(x, shape):
-        assert np.array_equal(x.shape, shape)
+def numba_funcify_SpecifyShape(op, node, **kwargs):
+    shape_inputs = node.inputs[1:]
+    shape_input_names = ["shape_" + str(i) for i in range(len(shape_inputs))]
+
+    func_conditions = [
+        f"assert x.shape[{i}] == {shape_input_names}"
+        for i, (shape_input, shape_input_names) in enumerate(
+            zip(shape_inputs, shape_input_names)
+        )
+        if shape_input is not NoneConst
+    ]
+
+    func = dedent(
+        f"""
+        def specify_shape(x, {create_arg_string(shape_input_names)}):
+            {"; ".join(func_conditions)}
             return x
+        """
+    )
 
-    return specifyshape
+    specify_shape = compile_function_src(func, "specify_shape", globals())
+    return numba_njit(specify_shape)
 
 
 def int_to_float_fn(inputs, out_dtype):

aesara/tensor/basic_opt.py

@@ -64,6 +64,7 @@ from aesara.tensor.basic import (
     join,
     ones_like,
     patternbroadcast,
+    stack,
     switch,
     tensor_copy,
     unbroadcast,
@@ -75,7 +76,14 @@ from aesara.tensor.exceptions import NotScalarConstantError, ShapeError
 from aesara.tensor.extra_ops import BroadcastTo, Repeat, Unique, broadcast_shape
 from aesara.tensor.math import all as at_all
 from aesara.tensor.math import eq
-from aesara.tensor.shape import Reshape, Shape, Shape_i, SpecifyShape, shape_padleft
+from aesara.tensor.shape import (
+    Reshape,
+    Shape,
+    Shape_i,
+    SpecifyShape,
+    shape_i,
+    shape_padleft,
+)
 from aesara.tensor.sort import TopKOp
 from aesara.tensor.subtensor import Subtensor, get_idx_list
 from aesara.tensor.type import (
@@ -84,6 +92,7 @@ from aesara.tensor.type import (
     discrete_dtypes,
     integer_dtypes,
 )
+from aesara.tensor.type_other import NoneConst
 from aesara.tensor.var import TensorConstant
 from aesara.utils import NoDuplicateOptWarningFilter
 
@@ -3521,7 +3530,14 @@ def local_Shape_of_SpecifyShape(fgraph, node):
     if not isinstance(getattr(specified_shape.owner, "op", None), SpecifyShape):
         return False
 
-    return [specified_shape.owner.inputs[1].astype(np.int64)]
+    x, *shape = specified_shape.owner.inputs
+
+    # Replace `NoneConst` by `shape_i`
+    for i, sh in enumerate(shape):
+        if NoneConst.equals(sh):
+            shape[i] = shape_i(x, i, fgraph)
+
+    return [stack(shape).astype(np.int64)]
 
 
 @register_useless

aesara/tensor/shape.py

 import warnings
 from numbers import Number
+from textwrap import dedent
 from typing import Dict, List, Tuple, Union
 
 import numpy as np
 
 import aesara
 from aesara.gradient import DisconnectedType
-from aesara.graph.basic import Apply, Constant, Variable
+from aesara.graph.basic import Apply, Variable
 from aesara.link.c.op import COp
 from aesara.link.c.params_type import ParamsType
 from aesara.misc.safe_asarray import _asarray
@@ -15,7 +16,8 @@ from aesara.tensor import _get_vector_length
 from aesara.tensor import basic as at
 from aesara.tensor import get_vector_length
 from aesara.tensor.exceptions import NotScalarConstantError
-from aesara.tensor.type import TensorType, int_dtypes, tensor
+from aesara.tensor.type import DenseTensorType, TensorType, int_dtypes, tensor
+from aesara.tensor.type_other import NoneConst
 from aesara.tensor.var import TensorConstant, TensorVariable
 
 
@@ -362,28 +364,6 @@ def register_shape_i_c_code(typ, code, check_input, version=()):
     Shape_i.c_code_and_version[typ] = (code, check_input, version)
 
 
-def register_specify_shape_c_code(typ, code, version=(), c_support_code_apply=None):
-    """
-    Tell SpecifyShape how to generate C code for an Aesara Type.
-
-    Parameters
-    ----------
-    typ : Aesara type
-        It must be the Aesara class itself and not an instance of the class.
-    code : C code
-        Checks the shape and returns a view for the Aesara type 'typ'.
-        Use %(iname)s and %(oname)s for the input and output C variable names
-        respectively. %(shape)s is the vector of shape of %(iname)s.
-        Check that its length is good.
-    version
-        A number indicating the version of the code, for cache.
-    c_support_code_apply
-        Extra code.
-
-    """
-    SpecifyShape.c_code_and_version[typ] = (code, version, c_support_code_apply)
-
-
 class SpecifyShape(COp):
     """
     L{Op} that puts into the graph the user-provided shape.
@@ -396,33 +376,29 @@ class SpecifyShape(COp):
     Notes
     -----
     Maybe in the future we will never do the assert!
-
-    We currently don't support specifying partial shape information.
-
-    TODO : test this op with sparse. Do C code for them too.
-
     """
 
     view_map = {0: [0]}
-    # Mapping from Type to C code (and version) to use.
-    # In the C code, the name of the input variable is %(iname)s,
-    # the output variable is %(oname)s.
-    c_code_and_version: Dict = {}
     __props__ = ()
     _f16_ok = True
 
-    def make_node(self, x, shape):
-        if not isinstance(x, Variable):
-            x = at.as_tensor_variable(x)
+    def make_node(self, x, *shape):
+        from aesara.tensor.basic import get_scalar_constant_value
 
-        shape = at.as_tensor_variable(shape, ndim=1)
+        x = at.as_tensor_variable(x)
 
-        if isinstance(shape, Constant):
-            shape = tuple(shape.data)
-        else:
-            shape = tuple(at.as_tensor_variable(s, ndim=0) for s in shape)
+        shape = tuple(
+            NoneConst
+            if (s is None or NoneConst.equals(s))
+            else at.as_tensor_variable(s, ndim=0)
+            for s in shape
+        )
 
-        if any(s.dtype not in aesara.tensor.type.integer_dtypes for s in shape):
+        if any(
+            s.dtype not in aesara.tensor.type.integer_dtypes
+            for s in shape
+            if hasattr(s, "dtype")
+        ):
             raise TypeError("Shape values must be integer types")
 
         if len(shape) != x.type.ndim:
@@ -430,102 +406,127 @@ class SpecifyShape(COp):
                 f"Input `x` is {x.type.ndim}-dimensional and will never match a shape of length {len(shape)}."
             )
 
-        if isinstance(x.type, TensorType) and all(isinstance(s, Number) for s in shape):
-            out_var = x.type.clone(shape=shape)()
+        type_shape = [None] * x.ndim
+        for i, (xts, s) in enumerate(zip(x.type.shape, shape)):
+            if xts is not None:
+                type_shape[i] = xts
             else:
-            out_var = x.type()
+                try:
+                    type_s = get_scalar_constant_value(s)
+                    if type_s is not None:
+                        type_shape[i] = int(type_s)
+                except NotScalarConstantError:
+                    pass
+
+        out_var = x.type.clone(shape=type_shape)()
 
-        in_shape = at.as_tensor_variable(shape, ndim=1)
-        return Apply(self, [x, in_shape], [out_var])
+        return Apply(self, [x, *shape], [out_var])
 
     def perform(self, node, inp, out_):
-        x, shape = inp
+        x, *shape = inp
         (out,) = out_
         ndim = len(shape)
         if x.ndim != ndim:
             raise AssertionError(
                 f"SpecifyShape: Got {x.ndim} dimensions (shape {x.shape}), expected {ndim} dimensions with shape {tuple(shape)}."
             )
-        if x.shape != tuple(shape):
+        if not all(xs == s for xs, s in zip(x.shape, shape) if s is not None):
             raise AssertionError(
-                f"SpecifyShape: Got shape {x.shape}, expected {tuple(shape)}."
+                f"SpecifyShape: Got shape {x.shape}, expected {tuple(int(s) if s is not None else None for s in shape)}."
             )
         out[0] = x
 
     def infer_shape(self, fgraph, node, shapes):
-        xshape, sshape = shapes
+        xshape, *_ = shapes
+        shape = node.inputs[1:]
         new_shape = []
         for dim in range(node.inputs[0].type.ndim):
+            s = shape[dim]
             try:
-                s = at.get_scalar_constant_value(node.inputs[1][dim])
-                s = at.as_tensor_variable(s)
-                new_shape.append(s)
+                s = at.get_scalar_constant_value(s)
+                # We assume that `None` shapes are always retrieved by
+                # `get_scalar_constant_value`, and only in that case do we default to
+                # the shape of the input variable
+                if s is None:
+                    s = xshape[dim]
             except NotScalarConstantError:
-                new_shape.append(node.inputs[1][dim])
+                pass
+            new_shape.append(at.as_tensor_variable(s))
 
         assert len(new_shape) == len(xshape)
         return [new_shape]
 
     def connection_pattern(self, node):
-        return [[True], [False]]
+        return [[True], *[[False]] * len(node.inputs[1:])]
 
     def grad(self, inp, grads):
-        x, s = inp
+        x, *shape = inp
         (gz,) = grads
         # Should I set an SpecifyShape on gz? I think so
         # But I don't do it now as we need to make an optimization
         # to remove that op from the graph to don't block other optimization
         # Should I do an optimizer that will remove the SpecifyShape?
         # I think Yes
-        return [gz, aesara.gradient.DisconnectedType()()]
-        return [specify_shape(gz, s), aesara.gradient.DisconnectedType()()]
+        # return [specify_shape(gz, s)] + [aesara.gradient.DisconnectedType()() for _ in range(len(shape))]
+        return [gz] + [aesara.gradient.DisconnectedType()() for _ in range(len(shape))]
 
     def R_op(self, inputs, eval_points):
         if eval_points[0] is None:
-            # It means that the this op sits on top of a non-differentiable
-            # path
+            # It means that this op sits on top of a non-differentiable path
             return [None]
         return self.make_node(eval_points[0], *inputs[1:]).outputs
 
-    def c_support_code_apply(self, node, name):
-        itype = node.inputs[0].type.__class__
-        if itype in self.c_code_and_version:
-            _, _, support_code = self.c_code_and_version[itype]
-            if support_code:
-                return support_code
-        return super().c_support_code_apply(node, name)
+    def c_code(self, node, name, i_names, o_names, sub):
+        if not isinstance(node.inputs[0].type, DenseTensorType):
+            raise NotImplementedError(
+                f"Specify_shape c_code not implemented for input type {node.inputs[0].type}"
+            )
 
-    def c_code(self, node, name, inames, onames, sub):
-        iname, shape = inames
-        (oname,) = onames
+        x_name, *shape_names = i_names
+        (o_name,) = o_names
         fail = sub["fail"]
 
-        itype = node.inputs[0].type.__class__
-        if itype in self.c_code_and_version:
-            code, version, _ = self.c_code_and_version[itype]
-            return code % locals()
+        code = dedent(
+            f"""
+            if (PyArray_NDIM({x_name}) != {len(shape_names)}) {{
+                PyErr_Format(PyExc_AssertionError,
+                    "SpecifyShape: Got %d dimensions, expected %d dimensions.",
+                    PyArray_NDIM({x_name}), {len(shape_names)}
+                );
+                {fail};
+            }}
+            """
+        )
 
-        raise NotImplementedError()
+        for i, (shp_name, shp) in enumerate(zip(shape_names, node.inputs[1:])):
+            if NoneConst.equals(shp):
+                continue
+            code += dedent(
+                f"""
+                if (py_{shp_name} != Py_None){{
+                    dtype_{shp_name} shp = ((dtype_{shp_name}*)PyArray_GETPTR1({shp_name}, 0))[0];
+                    if (PyArray_DIMS({x_name})[{i}] != shp) {{
+                        PyErr_Format(PyExc_AssertionError,
+                            "SpecifyShape: dim %d of input has shape %d, expected %d.",
+                            {i}, PyArray_DIMS({x_name})[{i}], shp
+                        );
+                        {fail};
+                    }}
+                }}
+                """
+            )
 
-    def c_code_cache_version(self):
-        version = []
-        # If any of the c code is unversioned, we have to return ()
-        # Else, we will return a list of (type name, version) pairs.
-        for t, (c, v, _) in sorted(
-            self.c_code_and_version.items(), key=lambda pair: str(pair[0])
-        ):
-            if not v:
-                warnings.warn(
-                    "Type %s has C code for SpecifyShape, but it "
-                    "has no version. You should add a 'version' "
-                    "keyword arg when calling "
-                    "register_specify_shape_c_code." % t,
-                    stacklevel=2,
+        code += dedent(
+            f"""
+            Py_XDECREF({o_name});
+            {o_name} = {x_name};
+            Py_XINCREF({o_name});
+            """
         )
-                return ()
-            version.append((str(t), v))
+        return code
 
-        return tuple(version)
+    def c_code_cache_version(self):
+        return (2,)
 
 
 _specify_shape = SpecifyShape()
@@ -537,29 +538,31 @@ def specify_shape(
         int, List[Union[int, Variable]], Tuple[Union[int, Variable]], Variable
     ],
 ):
-    """Specify a fixed shape for a `Variable`."""
+    """Specify a fixed shape for a `Variable`.
 
-    if not isinstance(x, Variable):
-        x = at.as_tensor_variable(x)
+    If a dimension's shape value is ``None``, the size of that dimension is not considered fixed/static at runtime.
+    """
 
-    if np.ndim(shape) == 0:
-        shape = at.as_tensor_variable([shape])
+    if not isinstance(shape, (tuple, list)):
+        shape = (shape,)
 
+    # If shape is a symbolic 1d vector of fixed length, we separate the items into a
+    # tuple with one entry per shape dimension
+    if len(shape) == 1 and shape[0] is not None:
+        shape_vector = at.as_tensor_variable(shape[0])
+        if shape_vector.ndim == 1:
             try:
-        _ = get_vector_length(shape)
+                shape = tuple(shape_vector)
             except ValueError:
-        raise ValueError("Shape must have fixed dimensions")
+                raise ValueError("Shape vector must have fixed dimensions")
 
-    if isinstance(shape, Constant):
-        shape = tuple(shape.data)
-
-    return _specify_shape(x, shape)
+    return _specify_shape(x, *shape)
 
 
 @_get_vector_length.register(SpecifyShape)
 def _get_vector_length_SpecifyShape(op, var):
     try:
-        return at.get_scalar_constant_value(var.owner.inputs[1])
+        return at.get_scalar_constant_value(var.owner.inputs[1]).item()
     except NotScalarConstantError:
         raise ValueError(f"Length of {var} cannot be determined")
 
@@ -882,34 +885,3 @@ register_shape_i_c_code(
     """,
     version=3,
 )
-
-
-register_specify_shape_c_code(
-    TensorType,
-    """
-        if (PyArray_NDIM(%(iname)s) != PyArray_DIMS(%(shape)s)[0]) {
-            PyErr_Format(PyExc_AssertionError,
-                "SpecifyShape: Got %%d dimensions, expected %%d dimensions.",
-                PyArray_NDIM(%(iname)s),
-                PyArray_DIMS(%(shape)s)[0]
-            );
-            %(fail)s;
-        }
-        for(int i = 0; i < PyArray_NDIM(%(iname)s); i++){
-            dtype_%(shape)s shp = ((dtype_%(shape)s*)PyArray_GETPTR1(%(shape)s,
-                                                                     i))[0];
-            if (PyArray_DIMS(%(iname)s)[i] != shp) {
-                PyErr_Format(PyExc_AssertionError,
-                             "SpecifyShape: dim %%d of input has shape %%d,"
-                             " expected %%d.",
-                             i, PyArray_DIMS(%(iname)s)[i],
-                             shp);
-                %(fail)s;
-            }
-        }
-        Py_XDECREF(%(oname)s);
-        %(oname)s = %(iname)s;
-        Py_XINCREF(%(oname)s);
-    """,
-    version=1,
-)

aesara/tensor/subtensor_opt.py

@@ -1646,7 +1646,7 @@ def local_subtensor_SpecifyShape_lift(fgraph, node):
         return False
 
     obj_arg = specify_shape_node.owner.inputs[0]
-    shape_arg = specify_shape_node.owner.inputs[1]
+    shape_arg = specify_shape_node.owner.inputs[1:]
 
     indices = get_idx_list(node.inputs, node.op.idx_list)
 

tests/link/test_jax.py

@@ -185,7 +185,7 @@ def test_jax_specify_shape():
 
     with config.change_flags(compute_test_value="off"):
 
-        x = SpecifyShape()(at.as_tensor_variable(x_np), (2, 3))
+        x = SpecifyShape()(at.as_tensor_variable(x_np), *(2, 3))
         x_fg = FunctionGraph([], [x])
 
         with pytest.raises(AssertionError):

tests/link/test_numba.py

@@ -896,10 +896,15 @@ def test_Reshape_scalar():
             (1, 1),
             True,
         ),
+        (
+            set_test_value(at.matrix(), np.array([[1.0, 2.0]], dtype=config.floatX)),
+            (1, None),
+            False,
+        ),
     ],
 )
 def test_SpecifyShape(v, shape, fails):
-    g = SpecifyShape()(v, shape)
+    g = SpecifyShape()(v, *shape)
     g_fg = FunctionGraph(outputs=[g])
     cm = contextlib.suppress() if not fails else pytest.raises(AssertionError)
     with cm:

tests/tensor/test_basic_opt.py

@@ -2975,6 +2975,24 @@ def test_local_Shape_of_SpecifyShape(shape):
     assert shape in fgraph.variables
 
 
+@pytest.mark.parametrize(
+    "s1",
+    [lscalar(), iscalar()],
+)
+def test_local_Shape_of_SpecifyShape_partial(s1):
+    x = matrix()
+    s = specify_shape(x, (s1, None)).shape
+
+    fgraph = FunctionGraph(outputs=[s], clone=False)
+    assert any(isinstance(apply.op, SpecifyShape) for apply in fgraph.apply_nodes)
+
+    _ = optimize_graph(fgraph, clone=False)
+
+    assert x in fgraph.variables
+    assert s1 in fgraph.variables
+    assert not any(isinstance(apply.op, SpecifyShape) for apply in fgraph.apply_nodes)
+
+
 def test_local_Shape_i_of_broadcastable():
     x = tensor(np.float64, [False, True])
     s = Shape_i(1)(x)

tests/tensor/test_shape.py

@@ -344,13 +344,13 @@ class TestSpecifyShape(utt.InferShapeTester):
             specify_shape([[1, 2, 3], [4, 5, 6]], (2.2, 3))
 
         with pytest.raises(TypeError, match="must be integer types"):
-            _specify_shape([[1, 2, 3], [4, 5, 6]], (2.2, 3))
+            _specify_shape([[1, 2, 3], [4, 5, 6]], *(2.2, 3))
 
         with pytest.raises(ValueError, match="will never match"):
             specify_shape(matrix(), [4])
 
         with pytest.raises(ValueError, match="will never match"):
-            _specify_shape(matrix(), [4])
+            _specify_shape(matrix(), *[4])
 
         with pytest.raises(ValueError, match="must have fixed dimensions"):
             specify_shape(matrix(), vector(dtype="int32"))
@@ -378,6 +378,14 @@ class TestSpecifyShape(utt.InferShapeTester):
         f = aesara.function([x], y, mode=self.mode)
         assert f([15]) == [15]
 
+    def test_partial_shapes(self):
+        x = matrix()
+        s1 = lscalar()
+        y = specify_shape(x, (s1, None))
+        f = aesara.function([x, s1], y, mode=self.mode)
+        assert f(np.zeros((2, 5), dtype=config.floatX), 2).shape == (2, 5)
+        assert f(np.zeros((3, 5), dtype=config.floatX), 3).shape == (3, 5)
+
     def test_fixed_shapes(self):
         x = vector()
         shape = as_tensor_variable([2])
@@ -385,6 +393,15 @@ class TestSpecifyShape(utt.InferShapeTester):
         assert y.type.shape == (2,)
         assert y.shape.equals(shape)
 
+    def test_fixed_partial_shapes(self):
+        x = TensorType("floatX", (None, None))("x")
+        y = specify_shape(x, (None, 5))
+        assert y.type.shape == (None, 5)
+
+        x = TensorType("floatX", (3, None))("x")
+        y = specify_shape(x, (None, 5))
+        assert y.type.shape == (3, 5)
+
     def test_python_perform(self):
         """Test the Python `Op.perform` implementation."""
         x = scalar()
@@ -403,13 +420,20 @@ class TestSpecifyShape(utt.InferShapeTester):
         with pytest.raises(AssertionError, match="SpecifyShape:.*"):
             assert f([1], (2,)) == [1]
 
+        x = matrix()
+        y = specify_shape(x, (None, 2))
+        f = aesara.function([x], y, mode=Mode("py"))
+        assert f(np.zeros((3, 2), dtype=config.floatX)).shape == (3, 2)
+        with pytest.raises(AssertionError, match="SpecifyShape:.*"):
+            assert f(np.zeros((3, 3), dtype=config.floatX))
+
     def test_bad_shape(self):
         """Test that at run-time we raise an exception when the shape is not the one specified."""
         specify_shape = SpecifyShape()
 
         x = vector()
         xval = np.random.random((2)).astype(config.floatX)
-        f = aesara.function([x], specify_shape(x, [2]), mode=self.mode)
+        f = aesara.function([x], specify_shape(x, 2), mode=self.mode)
 
         assert np.array_equal(f(xval), xval)
 
@@ -426,7 +450,7 @@ class TestSpecifyShape(utt.InferShapeTester):
 
         x = matrix()
         xval = np.random.random((2, 3)).astype(config.floatX)
-        f = aesara.function([x], specify_shape(x, [2, 3]), mode=self.mode)
+        f = aesara.function([x], specify_shape(x, 2, 3), mode=self.mode)
         assert isinstance(
             [n for n in f.maker.fgraph.toposort() if isinstance(n.op, SpecifyShape)][0]
             .inputs[0]
@@ -441,6 +465,13 @@ class TestSpecifyShape(utt.InferShapeTester):
             with pytest.raises(AssertionError, match="SpecifyShape:.*"):
                 f(xval)
 
+        s = iscalar("s")
+        f = aesara.function([x, s], specify_shape(x, None, s), mode=self.mode)
+        x_val = np.zeros((3, 2), dtype=config.floatX)
+        assert f(x_val, 2).shape == (3, 2)
+        with pytest.raises(AssertionError, match="SpecifyShape:.*"):
+            f(xval, 3)
+
     def test_infer_shape(self):
         rng = np.random.default_rng(3453)
         adtens4 = dtensor4()
@@ -454,6 +485,19 @@ class TestSpecifyShape(utt.InferShapeTester):
             SpecifyShape,
         )
 
+    def test_infer_shape_partial(self):
+        rng = np.random.default_rng(3453)
+        adtens4 = dtensor4()
+        aivec = [iscalar(), iscalar(), None, iscalar()]
+        aivec_val = [3, 4, 5]
+        adtens4_val = rng.random((3, 4, 2, 5))
+        self._compile_and_check(
+            [adtens4, *(ivec for ivec in aivec if ivec is not None)],
+            [specify_shape(adtens4, aivec)],
+            [adtens4_val, *aivec_val],
+            SpecifyShape,
+        )
+
 
 class TestRopLop(RopLopChecker):
     def test_shape(self):

tests/tensor/test_sharedvar.py

@@ -474,7 +474,7 @@ def makeSharedTester(
             assert np.all(self.ref_fct(specify_shape_fct()) == self.ref_fct(x1_2))
             topo_specify = specify_shape_fct.maker.fgraph.toposort()
             if aesara.config.mode != "FAST_COMPILE":
-                assert len(topo_specify) == 4
+                assert len(topo_specify) == 3
 
             # Test that we put the shape info into the graph
             shape_constant_fct = aesara.function([], x1_specify_shape.shape)