def rewrite_random_uniform(g, ops):
pattern = \
OpTypePattern('Add', name='output', inputs=[
OpTypePattern('Mul', inputs=[
OpTypePattern('RandomUniform', name='input1', inputs=["*"]),
OpTypePattern('Sub', name='input2', inputs=["*", "*"]),
]), None
])
matcher = GraphMatcher(pattern)
match_results = list(matcher.match_ops(ops))
for match in match_results:
input2 = match.get_op('input2')
output = match.get_op('output')
ru_op = match.get_op('input1')
# max is on input 0
tmax = input2.inputs[0].get_tensor_value()
tmin = input2.inputs[1].get_tensor_value()
to_delete = list(set(match.get_nodes()))
new_node = create_onnx_random_uniform_op(g, tmax, tmin, ru_op, output,
to_delete)
g.replace_all_inputs(output.output[0], new_node.output[0], ops=ops)
g.safe_remove_nodes(to_delete)
return ops
def _parse_input_ta(self, context):
graph_inputs = [
v.switch_true_identity_output.id
for v in context.loop_properties.all_variables.values()
if v.switch_true_identity_output.id
]
matcher = GraphMatcher(self.ta_read_input_pattern, allow_reorder=False)
match_results = matcher.match_ops(self.g.get_nodes())
match_results = [
r for r in match_results
if r.get_op("ta_index").output[0] in graph_inputs
]
for match in match_results:
ta_input_scatter = match.get_op("ta_input_scatter")
# the 3rd input of scatter is the value
data_input_id = ta_input_scatter.input[2]
ta_read_node = match.get_op("ta_read")
# todo: need check ta's index variable is a scalar starting from 1, and increase by 1 each iteration.
# then we can be sure this is equivalent to scan input behavior.
index_input_id = ta_read_node.input[1]
unstacked_ta_consumer = match.get_op("ta_read").output[0]
ta = InputTensorArray(data_input_id, index_input_id,
unstacked_ta_consumer, self.g)
context.loop_properties.add_scan_input(ta)
def test_match_flipped(self):
n1 = helper.make_node("Sub", ["i1", "i1"], ["n1:0"], name="n1")
n2 = helper.make_node("Add", ["i2", "i2"], ["n2:0"], name="n2")
n3 = helper.make_node("Mul", ["n1:0", "n2:0"], ["n3:0"], name="n3")
graph_proto = helper.make_graph(
nodes=[n1, n2, n3],
name="test",
inputs=[
helper.make_tensor_value_info("i1", TensorProto.FLOAT, [2, 2]),
helper.make_tensor_value_info("i2", TensorProto.FLOAT, [2, 2])
],
outputs=[
helper.make_tensor_value_info("n2:0", TensorProto.FLOAT,
[2, 2])
],
initializer=[])
g = GraphUtil.create_graph_from_onnx_graph(graph_proto)
pattern = OpTypePattern(
'Mul', inputs=[OpTypePattern('Add'),
OpTypePattern('Sub')])
ops = g.get_nodes()
matcher = GraphMatcher(pattern, allow_reorder=True)
match_results = list(matcher.match_ops(ops))
self.assertEqual(1, len(match_results))
def test_rewrite_subgraph(self):
graph_proto = self.sample_net()
g = GraphUtil.create_graph_from_onnx_graph(graph_proto)
pattern = \
OpTypePattern('Abs', name='output', inputs=[
OpTypePattern('Add', name='input')
])
ops = g.get_nodes()
matcher = GraphMatcher(pattern)
match_results = list(matcher.match_ops(ops))
for match in match_results:
input_node = match.get_op('input')
output_node = match.get_op('output')
op_name = utils.make_name("ReplacedOp")
out_name = utils.port_name(op_name)
new_node = g.make_node("Sub",
inputs=input_node.input,
outputs=[out_name],
name=op_name)
g.replace_all_inputs(output_node.output[0],
new_node.output[0]) # ops=ops
for n in set(match.get_nodes()):
g.remove_node(n.name)
g.topological_sort(ops)
result = onnx_to_graphviz(g)
expected = 'digraph { Placeholder__5 [op_type=Placeholder] n1 [op_type=Abs] ' \
'n3 [op_type=Abs] n2 [op_type=Abs] ReplacedOp__6 [op_type=Sub] ' \
'n6 [op_type=Identity] n5_graph_outputs_Identity__4 [op_type=Identity] ' \
'input -> n1 n1:0 -> n3 n1:0 -> n2 n2:0 -> ReplacedOp__6 n3:0 -> ReplacedOp__6 ' \
'ReplacedOp__6:0 -> n6 ReplacedOp__6:0 -> n5_graph_outputs_Identity__4 }'
self.assertEqual(expected, result)
def rewrite_quantize_and_dequantize(g, ops):
pattern_for_qdq_v2 = \
OpTypePattern('QuantizeAndDequantizeV2', name='output', inputs=[
OpTypePattern("*"),
OpTypePattern(None),
OpTypePattern(None),
])
pattern_for_qdq_v3 = \
OpTypePattern('QuantizeAndDequantizeV3', name='output', inputs=[
OpTypePattern("*"),
OpTypePattern(None),
OpTypePattern(None),
OpTypePattern(None),
])
# Match all the patterns for QDQ ops
patterns = [pattern_for_qdq_v3, pattern_for_qdq_v2]
match_results = []
for pattern in patterns:
matcher = GraphMatcher(pattern)
results = list(matcher.match_ops(ops))
match_results.extend(results)
return create_qdq_nodes(g, match_results)
def rewrite_random_uniform_fold_const(g, ops):
pattern = \
OpTypePattern('Add', name='output', inputs=[
OpTypePattern('Mul', name='mul', inputs=[
OpTypePattern('RandomUniform', name='input1', inputs=["*"]),
None,
]),
None,
])
matcher = GraphMatcher(pattern)
match_results = list(matcher.match_ops(ops))
for match in match_results:
output = match.get_op('output')
mul = match.get_op('mul')
ru_op = match.get_op('input1')
tmax_minus_tmin = mul.inputs[1].get_tensor_value()
tmin = output.inputs[1].get_tensor_value()
tmax = tmin + tmax_minus_tmin
to_delete = list(set(match.get_nodes()))
new_node = create_onnx_random_uniform_op(g, tmax, tmin, ru_op, output,
to_delete)
g.replace_all_inputs(output.output[0], new_node.output[0], ops=ops)
g.safe_remove_nodes(to_delete)
return ops
def rewrite_biasadd_with_conv2d(g, ops):
pattern = \
OpTypePattern('BiasAdd', name='biasadd', inputs=[
OpTypePattern('Conv2D|Conv2DBackpropInput', name='conv', inputs=['*', '*']), '*'])
matcher = GraphMatcher(pattern)
match_results = list(matcher.match_ops(ops))
for match in match_results:
biasadd = match.get_op('biasadd')
conv = match.get_op('conv')
#backup the conv and biasadd values
conv_type = conv.type
conv_input = conv.input
conv_attr = conv.attr
dtype = g.get_dtype(conv.output[0])
shape = g.get_shape(conv.output[0])
conv_name = biasadd.name
conv_output = biasadd.output
conv_inputs = [conv_input[0], conv_input[1], biasadd.input[1]]
# Remove the Conv and BiasAdd node
g.remove_node(conv.name)
g.remove_node(biasadd.name)
g.make_node(conv_type,
conv_inputs,
attr=conv_attr,
name=conv_name,
outputs=conv_output,
shapes=[shape],
dtypes=[dtype],
skip_conversion=False)
return ops
def rewrite_tfl_qdq(g, ops):
pattern0 = \
OpTypePattern('TFL_DEQUANTIZE', name='dequant', inputs=[
OpTypePattern('TFL_QUANTIZE', name='quant'),
])
matcher = GraphMatcher(pattern0, allow_reorder=False)
match_results = list(matcher.match_ops(ops))
if match_results:
for match in match_results:
dequant = match.get_op("dequant")
quant = match.get_op("quant")
inp_node = quant.inputs[0]
for k in ["scale", "quantized_dimension", "zero_point"]:
if dequant.get_attr_value(k) != quant.get_attr_value(k):
continue
needed_relu = None
if all(k in quant.attr and len(quant.get_attr_value(k)) == 1
for k in ["min", "max"]):
min_val = quant.get_attr_value("min")[0]
max_val = quant.get_attr_value("max")[0]
if min_val == 0.0 and 5.999 <= max_val <= 6.0:
needed_relu = "TFL_RELU6"
elif min_val == 0.0:
# This may introduce unneeded relu ops but will be correct.
# If the --dequantize feature is used a lot in the future we can optimize this.
needed_relu = "TFL_RELU"
if inp_node.type == needed_relu:
# If it's really obviously unneeded, we skip it.
needed_relu = None
elif "TFL_" + inp_node.get_attr_value(
"fused_activation_function",
b'').decode() == needed_relu:
needed_relu = None
if needed_relu is not None:
relu_name = inp_node.name + "_relu"
relu6 = g.make_node(needed_relu, [quant.input[0]],
op_name_scope=relu_name,
skip_conversion=False,
shapes=quant.output_shapes,
dtypes=quant.output_dtypes)
g.replace_all_inputs(dequant.output[0], relu6.output[0])
else:
g.replace_all_inputs(dequant.output[0], quant.input[0])
g.remove_node(dequant.name)
if len(g.find_output_consumers(quant.output[0])) == 0:
g.remove_node(quant.name)
return ops
def rewrite_conv2d_with_pad(g, ops):
pattern = \
OpTypePattern("Conv2D", name="conv", inputs=[
OpTypePattern("Pad", name="pad"),
OpTypePattern("*")
])
matcher = GraphMatcher(pattern)
match_results = list(matcher.match_ops(ops))
for match in match_results:
conv = match.get_op("conv")
pad = match.get_op("pad")
paddings = pad.inputs[1]
if not paddings.is_const():
continue
mode = pad.get_attr("mode")
if mode:
mode = mode.s.decode("utf-8").lower()
if mode not in [None, "constant"] or len(pad.input) >= 3:
continue
# Conv2D already has a pad
if conv.get_attr("padding").s.decode("utf-8") == "SAME":
continue
logger.debug("merge pad [%s] into conv [%s]", pad.name, conv.name)
paddings_val = np.array(paddings.get_tensor_value())
# can't pad on batch or channel dimensions
data_format = conv.get_attr("data_format").s.decode("utf-8")
if data_format == "NHWC":
if np.any(paddings_val[0]) or np.any(paddings_val[3]):
continue
paddings_val = paddings_val[1:3]
else:
if np.any(paddings_val[0]) or np.any(paddings_val[1]):
continue
paddings_val = paddings_val[2:4]
paddings_val = paddings_val.transpose().flatten()
g.replace_input(conv, conv.input[0], pad.input[0], 0)
# convert Conv2D
conv.type = "Conv2D"
func, _ = handler.tf_op.find_effective_op("Conv2D")
func(g, conv)
conv.skip_conversion = True
conv.set_attr("auto_pad", "NOTSET")
conv.set_attr("pads", paddings_val)
return ops
def rewrite_thresholded_relu(g, ops):
if g.opset < 10:
return ops
pattern = \
OpTypePattern('Mul', name='mul', inputs=[
OpTypePattern('Cast', name='cast', inputs=[
OpTypePattern('Greater', name='greater', inputs=[
OpTypePattern('*', name='greater_input'),
OpTypePattern('Const', name='theta')
])
]),
OpTypePattern('*', name='mul_input')
])
matcher = GraphMatcher(pattern, allow_reorder=True)
match_results = list(matcher.match_ops(ops))
for match in match_results:
greater_node = match.get_op('greater')
greater_input_node = match.get_op('greater_input')
mul_node = match.get_op("mul")
mul_input_node = match.get_op('mul_input')
cast_node = match.get_op('cast')
greater_input_edge_name = _find_edge_name_between_nodes(
greater_input_node, greater_node)
mul_input_edge_name = _find_edge_name_between_nodes(
mul_input_node, mul_node)
if greater_input_edge_name == mul_input_edge_name:
theta = match.get_op('theta').get_tensor_value()
thresholded_relu = g.make_node(
"ThresholdedRelu",
inputs=[mul_input_edge_name],
attr={"alpha": theta},
shapes=[g.get_shape(mul_node.output[0])],
dtypes=[g.get_dtype(mul_node.output[0])])
g.replace_all_inputs(mul_node.output[0],
thresholded_relu.output[0],
ops=ops)
to_delete = [cast_node, mul_node]
g.safe_remove_nodes(to_delete)
return ops
def rewrite_leakyrelu(g, ops):
if g.opset < 6:
return ops
pattern = \
OpTypePattern('Maximum', name='max', inputs=[
OpTypePattern('Mul', name='mul', inputs=[
OpTypePattern('Const', name='alpha'),
OpTypePattern('*', name='mul_input'),
]),
OpTypePattern('*', name='max_input'),
])
matcher = GraphMatcher(pattern, allow_reorder=True)
match_results = list(matcher.match_ops(ops))
for match in match_results:
max_node = match.get_op('max')
max_input_node = match.get_op('max_input')
mul_node = match.get_op("mul")
mul_input_node = match.get_op('mul_input')
max_input_edge_name = _find_edge_name_between_nodes(
max_input_node, max_node)
mul_input_edge_name = _find_edge_name_between_nodes(
mul_input_node, mul_node)
if max_input_edge_name == mul_input_edge_name:
alpha = match.get_op("alpha").get_tensor_value()
if alpha >= 1:
continue
leakyrelu = g.make_node("LeakyRelu",
inputs=[max_input_edge_name],
attr={"alpha": alpha},
shapes=[g.get_shape(max_node.output[0])],
dtypes=[g.get_dtype(max_node.output[0])])
ops.append(leakyrelu)
g.replace_all_inputs(max_node.output[0],
leakyrelu.output[0],
ops=ops)
to_delete = [max_node, mul_node]
g.safe_remove_nodes(to_delete)
return ops
def rewrite_transpose(g, ops):
pattern = \
OpTypePattern('Transpose', name='output', inputs=[
OpTypePattern(None),
OpTypePattern('Sub', inputs=[
OpTypePattern('Sub', inputs=["*", "*"]),
OpTypePattern('Range', inputs=["*", "*", "*"]),
]),
])
matcher = GraphMatcher(pattern)
match_results = list(matcher.match_ops(ops))
for match in match_results:
output = match.get_op('output')
shape = g.get_shape(output.input[0])
dims = range(len(shape) - 1, -1, -1)
output.set_attr("perm", dims)
g.remove_input(output, output.input[1], 1)
to_delete = [n for n in match.get_nodes() if n != output]
g.safe_remove_nodes(to_delete)
return ops
def _match_cell(self, context, unittype):
"""match unit cell"""
for cell_pattern in get_pattern(unittype):
matcher = GraphMatcher(cell_pattern, allow_reorder=True)
loop_props = context.loop_properties
inputs = loop_props.state_inputs + loop_props.scan_inputs
input_ids = [
input_tensor_value_info.id
for input_tensor_value_info in inputs
]
outputs = loop_props.state_outputs + loop_props.scan_outputs
output_ids = [
out_tensor_value_info.id for out_tensor_value_info in outputs
]
body_graph_ops, _, _ = LoopRewriterBase.find_subgraph(
set(input_ids), set(output_ids), self.g, merge_as_end=True)
match_results = list(matcher.match_ops(body_graph_ops))
if len(match_results) == 1:
return match_results[0]
return None
def rewrite_gemm(g, ops):
if g.opset <= 6:
return ops
# pattern0: alpha*A*B + beta*C
pattern0 = \
OpTypePattern('Add|AddV2', name='add', inputs=[
OpTypePattern('Mul', name='mul1', inputs=[
OpTypePattern('Const', name='alpha'),
OpTypePattern('MatMul', name='matmul')
]),
OpTypePattern('Mul', name='mul2', inputs=[
OpTypePattern('Const', name='beta'),
OpTypePattern('*', name='C')
])
])
# pattern1: alpha*A*B + C
pattern1 = \
OpTypePattern('Add|AddV2', name='add', inputs=[
OpTypePattern('Mul', name='mul1', inputs=[
OpTypePattern('MatMul', name='matmul'),
OpTypePattern('Const', name='alpha')
]),
OpTypePattern('*', name='C'),
])
# pattern2: A*B + beta*C
pattern2 = \
OpTypePattern('Add|AddV2', name='add', inputs=[
OpTypePattern('MatMul', name='matmul'),
OpTypePattern('Mul', name='mul2', inputs=[
OpTypePattern('Const', name='beta'),
OpTypePattern('*', name='C')
])
])
# pattern3: A*B + C
pattern3 = \
OpTypePattern('Add|AddV2', name='add', inputs=[
OpTypePattern('MatMul', name='matmul'),
OpTypePattern('*', name='C'),
])
# pattern4: A*B + c
pattern4 = \
OpTypePattern('BiasAdd', name='add', inputs=[
OpTypePattern('MatMul', name='matmul'),
OpTypePattern('*', name='C'),
])
pattern_list = [pattern0, pattern1, pattern2, pattern3, pattern4]
for pattern in pattern_list:
matcher = GraphMatcher(pattern, allow_reorder=True)
match_results = list(matcher.match_ops(ops))
if match_results:
for match in match_results:
matmul_node = match.get_op("matmul")
if g.get_dtype(matmul_node.input[0]) != onnx_pb.TensorProto.FLOAT:
logging.warning(u"For now, onnxruntime only support float32 type for Gemm rewriter")
continue
attr, is_valid = get_gemm_attr(match)
if not is_valid:
continue
add_node = match.get_op('add')
input_c_node = match.get_op("C")
a_edge_name = matmul_node.input[0]
b_edge_name = matmul_node.input[1]
c_edge_name = input_c_node.output[0]
a_mul_b_shape = g.get_shape(matmul_node.output[0])
c_shape = g.get_shape(c_edge_name)
if c_shape is None: continue
if a_mul_b_shape is None: continue
if -1 in c_shape + a_mul_b_shape: continue
if g.get_rank(a_edge_name) != 2 or g.get_rank(b_edge_name) != 2: continue
compatible = True
for i in range(1, len(c_shape) + 1):
if c_shape[-i] not in [1, a_mul_b_shape[-i]]:
compatible = False
if not compatible: continue
gemm = g.make_node("Gemm", inputs=[a_edge_name, b_edge_name, c_edge_name],
attr=attr,
shapes=[g.get_shape(add_node.output[0])],
dtypes=[g.get_dtype(add_node.output[0])], op_name_scope=matmul_node.name)
ops.append(gemm)
g.replace_all_inputs(add_node.output[0], gemm.output[0], ops=ops)
to_delete = [add_node, matmul_node]
g.safe_remove_nodes(to_delete)
return ops
def rewrite_eye(g, ops):
# schema of eye is eye(num_rows, num_columns=None), if num_columns not specified then it's equal to num_rows
# tf.eye is implemented by a sub_graph which contains op "MatrixDiag" or "MatrixSetDiag" while
# these two ops are un-supported directly in onnx
# but onnx op EyeLike can be used to map the sub_graph
# "rewrite_eye" supports tf.eye(non_const) and tf.eye(non_const1, non_const2).
# tf.eye(const) and tf.eye(const1, const2) are not supported in this rewriter
# ConstantOfShape in opset 9 is used, so if opset less than 9 then do nothing
if g.opset < 9:
return g.get_nodes()
pattern1 = \
OpTypePattern("MatrixDiag", name="output_eye_matrix", inputs=[
OpTypePattern("Fill", inputs=[
OpTypePattern("Const", name="fill_value"),
OpTypePattern("ConcatV2", inputs=[
"*",
"*",
OpTypePattern("Pack", inputs=[
OpTypePattern("Minimum|Cast", name="min_or_cast")
])
])
])
])
pattern2 = \
OpTypePattern("MatrixSetDiag", name="output_eye_matrix", inputs=[
OpTypePattern("Fill"),
OpTypePattern("Fill", inputs=[
OpTypePattern("Const", name="fill_value"),
OpTypePattern("ConcatV2", inputs=[
"*",
"*",
OpTypePattern("Pack", inputs=[
OpTypePattern("Minimum|Cast", name="min_or_cast")
])
])
])
])
pattern3 = \
OpTypePattern("MatrixDiag", name="output_eye_matrix", inputs=[
OpTypePattern("Fill", inputs=[
OpTypePattern("ConcatV2", inputs=[
"*",
OpTypePattern("ExpandDims", inputs=[
OpTypePattern("Minimum|Cast", name="min_or_cast"),
"*"
]),
"*",
]),
OpTypePattern("Const", name="fill_value"),
])
])
pattern4 = \
OpTypePattern("MatrixSetDiag", name="output_eye_matrix", inputs=[
OpTypePattern("Fill"),
OpTypePattern("Fill", inputs=[
OpTypePattern("ConcatV2", inputs=[
"*",
OpTypePattern("ExpandDims", inputs=[
OpTypePattern("Minimum|Cast", name="min_or_cast"),
"*"
]),
"*",
]),
OpTypePattern("Const", name="fill_value"),
]),
])
pattern5 = \
OpTypePattern("MatrixDiagV3", name="output_eye_matrix", inputs=[
OpTypePattern("Fill", inputs=[
OpTypePattern("ConcatV2", inputs=[
"*",
OpTypePattern("ExpandDims", inputs=[
OpTypePattern("Minimum|Cast", name="min_or_cast"),
"*"
]),
"*",
]),
OpTypePattern("Const", name="fill_value"),
]),
"*", "*", "*", "*",
])
pattern6 = \
OpTypePattern("MatrixSetDiagV3", name="output_eye_matrix", inputs=[
OpTypePattern("Fill"),
OpTypePattern("Fill", inputs=[
OpTypePattern("ConcatV2", inputs=[
"*",
OpTypePattern("ExpandDims", inputs=[
OpTypePattern("Minimum|Cast", name="min_or_cast"),
"*"
]),
"*",
]),
OpTypePattern("Const", name="fill_value"),
]), "*"
])
pattern7 = \
OpTypePattern("MatrixDiag", name="output_eye_matrix", inputs=[
OpTypePattern("Fill", inputs=[
OpTypePattern("Reshape", inputs=[
OpTypePattern("Minimum|Cast", name="min_or_cast"),
"*",
]),
OpTypePattern("Const", name="fill_value"),
])
])
pattern8 = \
OpTypePattern("MatrixSetDiag", name="output_eye_matrix", inputs=[
OpTypePattern("Fill"),
OpTypePattern("Fill", inputs=[
OpTypePattern("Reshape", inputs=[
OpTypePattern("Minimum|Cast", name="min_or_cast"),
"*",
]),
OpTypePattern("Const", name="fill_value"),
])
])
for pattern in [
pattern1, pattern2, pattern3, pattern4, pattern5, pattern6,
pattern7, pattern8
]:
matcher = GraphMatcher(pattern, allow_reorder=True)
match_results = list(matcher.match_ops(ops))
for match_result in match_results:
if match_result.get_op("fill_value").get_tensor_value() != 1:
continue
min_or_cast = match_result.get_op("min_or_cast")
if min_or_cast.type == "Minimum":
min_node = min_or_cast
elif min_or_cast.type == "Cast" and min_or_cast.inputs[
0].type == "Minimum":
min_node = min_or_cast.inputs[0]
else:
continue
num_rows = min_node.inputs[0]
num_columns = min_node.inputs[1]
old_output = match_result.get_op("output_eye_matrix")
output_dtypes = [g.get_dtype(old_output.output[0])]
output_shapes = [g.get_shape(old_output.output[0])]
g.remove_node(old_output.name)
# onnx op "EyeLike" need a 2D tensor, so generate it
num_rows = GraphBuilder(g).make_unsqueeze(
{
"axes": [0],
"data": num_rows.output[0]
}, return_node=True)
num_columns = GraphBuilder(g).make_unsqueeze(
{
"axes": [0],
"data": num_columns.output[0]
}, return_node=True)
matrix_shape = g.make_node(
"Concat", [num_rows.output[0], num_columns.output[0]],
attr={"axis": 0})
# cast nodes added for "ConstantOfShape" in ONNX only accepts int64 data.
matrix_shape_int64 = g.make_node(
"Cast",
matrix_shape.output,
attr={"to": onnx_pb.TensorProto.INT64})
zero_matrix = g.make_node("ConstantOfShape",
matrix_shape_int64.output)
g.make_node("EyeLike",
zero_matrix.output,
attr={"dtype": output_dtypes[0]},
name=old_output.name,
shapes=output_shapes,
dtypes=output_dtypes,
outputs=old_output.output)
return g.get_nodes()
def rewrite_dropout(g, ops):
patterns = [
OpTypePattern(
'Mul',
name='outputs',
inputs=[
OpTypePattern('RealDiv', name="input2"),
OpTypePattern(
'Floor',
inputs=[
OpTypePattern(
'Add',
inputs=[
OpTypePattern("*", name="input3"),
OpTypePattern(
'RandomUniform|RandomUniformLike'),
])
]),
]),
OpTypePattern(
"Mul",
name="outputs",
inputs=[
OpTypePattern("Mul", name="input2"),
OpTypePattern(
"Cast",
inputs=[
OpTypePattern(
"GreaterEqual",
inputs=[
OpTypePattern(
"RandomUniform|RandomUniformLike"),
OpTypePattern("*", name="input3")
])
])
]),
# pattern for tf-2.0 tf.nn.dropout()
OpTypePattern(
"Mul",
name="outputs",
inputs=[
OpTypePattern(
"Cast",
inputs=[
OpTypePattern(
"GreaterEqual",
inputs=[
OpTypePattern(
"RandomUniform|RandomUniformLike"),
OpTypePattern("*", name="input3")
])
]),
OpTypePattern("Mul", name="input2"),
]),
]
for pattern in patterns:
matcher = GraphMatcher(pattern, allow_reorder=True)
match_results = list(matcher.match_ops(ops))
for match in match_results:
input2 = match.get_op('input2')
input3 = match.get_op('input3')
outputs = match.get_op('outputs')
if not input3.is_scalar():
logger.warning(
"Dropout pattern rooted at %s does not have a "
"constant ratio and cannot be replaced.", outputs.name)
continue
ratio = input3.get_tensor_value()
if input2.inputs[0].is_scalar():
data = input2.inputs[1]
scaling_constant = input2.inputs[0].get_tensor_value()
elif input2.inputs[1].is_scalar():
data = input2.inputs[0]
scaling_constant = input2.inputs[1].get_tensor_value()
else:
logger.warning(
"Could not find scaling constant for dropout pattern rooted at %s. "
"The pattern will not be replaced with an ONNX dropout node.",
outputs.name)
continue
#The scaling constant should be 1/(1-ratio), otherwise this isn't truly a dropout node
if not np.allclose([1], [scaling_constant * (1 - ratio)]):
logger.warning(
"Scaling constant %f for dropout pattern rooted at %s is inconsistent with dropout "
"ratio %f. The pattern will not be replaced with an ONNX dropout node.",
scaling_constant, outputs.name, ratio)
continue
nodes_to_remove = [
n for n in match.get_nodes() if n.name != input3.name
]
if not g.is_safe_to_remove_nodes(nodes_to_remove,
[outputs.output[0]]):
logger.warning(
"Nodes in dropout pattern rooted at %s cannot be removed because intermediate results "
"of some nodes are referenced elsewhere in graph.",
outputs.name)
continue
op_name = utils.make_name("Dropout")
out_name = utils.port_name(op_name)
new_node = g.make_node("Dropout",
inputs=[data.output[0]],
outputs=[out_name],
name=op_name,
attr={"ratio": ratio},
shapes=[g.get_shape(data.output[0])],
dtypes=[g.get_dtype(data.output[0])])
g.replace_all_inputs(outputs.output[0],
new_node.output[0],
ops=ops)
for n in nodes_to_remove:
g.remove_node(n.name)
return ops
def rewrite_tfl_scan_outputs(g, ops):
pattern0 = \
OpTypePattern('TFL_CONCATENATION', name='concat', inputs=[
OpTypePattern('TFL_SLICE', name='begin_slice'),
OpTypePattern('*', name='middle'),
OpTypePattern('TFL_SLICE', name='end_slice')
])
matcher = GraphMatcher(pattern0, allow_reorder=False)
match_results = list(matcher.match_ops(ops))
if match_results:
for match in match_results:
concat = match.get_op("concat")
begin_slice = match.get_op("begin_slice")
middle = match.get_op("middle")
end_slice = match.get_op("end_slice")
middle_shape = g.get_shape(middle.output[0])
# Both slices must be slicing the same tensor
if begin_slice.input[0] != end_slice.input[0]:
continue
original_tensor = begin_slice.input[0]
if concat.get_attr_int("axis") != 0:
continue
# The inserted slice must have length 1 (to be a single index)
if middle_shape is None or len(
middle_shape) == 0 or middle_shape[0] != 1:
continue
rank = len(middle_shape)
scan_output = middle.output[0]
if not begin_slice.inputs[1].is_const(
) or not end_slice.inputs[2].is_const():
continue
# The first slice must start from the beginning (0) for all dims
if not all(v == 0
for v in begin_slice.inputs[1].get_tensor_value()):
continue
# The second slice must slice to the end (-1) for all dims
if not all(v == -1
for v in end_slice.inputs[2].get_tensor_value()):
continue
# The other slice dims are assembled by concatenation if rank > 1
if rank > 1:
begin_concat = begin_slice.inputs[2]
end_concat = end_slice.inputs[1]
if not begin_concat.type == "TFL_CONCATENATION":
continue
if not end_concat.type == "TFL_CONCATENATION":
continue
# Except for dim 0, slice from beginning to end
if not all(
get_uniform_const_val(inp) == -1
for inp in begin_concat.inputs[1:]):
continue
if not all(
get_uniform_const_val(inp) == 0
for inp in end_concat.inputs[1:]):
continue
begin_idx = begin_concat.inputs[0]
end_idx = end_concat.inputs[0]
else:
begin_idx = begin_slice.inputs[2]
end_idx = end_slice.inputs[1]
# For dim 0, slice to i for first part and from i+1 for second
if not node_is_one_plus_node(begin_idx, end_idx):
continue
out1, _ = get_out_and_offset(begin_idx)
graph_inps = [n.output[0] for n in g.inputs]
# To be a scan output, i must be a graph input
if out1 not in graph_inps:
continue
# The array being sliced must be a graph input
if original_tensor not in graph_inps:
continue
# The input/output index of i
idx = graph_inps.index(out1)
# The input/output index of the array
scan_output_idx = graph_inps.index(original_tensor)
# For a scan output, i must be assigned to i+1 with each iteration
if not node_is_one_plus_node(g.get_node_by_output(out1),
g.get_node_by_output(g.outputs[idx])):
continue
if len(g.find_output_consumers(concat.output[0])) > 1:
continue
if g.opset < 10 and len(g.find_output_consumers(
concat.output[0])) <= 1:
# If opset is < 10, conversion of the subgraph will fail unless we remove the slice nodes
# We add a tmp node to replace them.
shape = g.get_shape(concat.output[0])
dtype = g.get_dtype(concat.output[0])
tmp_node = g.make_node("TMP_SCAN_OUTPUT",
[original_tensor, scan_output],
shapes=[shape],
dtypes=[dtype])
g.replace_all_inputs(concat.output[0], tmp_node.output[0])
to_remove = []
out = g.outputs[scan_output_idx]
node = g.get_node_by_output(out)
to_remove.append(node)
while len(node.input) > 0 and node != concat:
out = node.input[0]
node = g.get_node_by_output(out)
to_remove.append(node)
to_remove += [begin_slice, end_slice, concat]
out = original_tensor
node = g.get_node_by_output(out)
to_remove.append(node)
while len(node.input) > 0:
out = node.input[0]
node = g.get_node_by_output(out)
to_remove.append(node)
if not g.is_safe_to_remove_nodes(to_remove):
continue
g.scan_outputs.append((scan_output_idx, scan_output))
return ops
def rewrite_random_normal(g, ops):
pattern1 = \
OpTypePattern('Add', name='output', inputs=[
OpTypePattern('Mul', name='input2', inputs=[
OpTypePattern('RandomStandardNormal', name='input1', inputs=["*"]), "*"
]), "*"
])
pattern2 = \
OpTypePattern('Identity', name='output', inputs=[
OpTypePattern('Identity', name='input2', inputs=[
OpTypePattern('RandomStandardNormal', name='input1', inputs=["*"])
])
])
pattern_list = [pattern1, pattern2]
for pattern in pattern_list:
matcher = GraphMatcher(pattern)
match_results = list(matcher.match_ops(ops))
for match in match_results:
output = match.get_op('output')
if output.type == 'Add':
# pattern 1
mean = output.inputs[1].get_tensor_value()
else:
# pattern 2
mean = 0.0
dtype = g.get_dtype(output.output[0])
op_name = utils.make_name("RandomNormal")
out_name = utils.port_name(op_name)
rn_op = match.get_op('input1')
seed = rn_op.get_attr('seed2').i
if rn_op.inputs[0].type == "Shape":
shape_node = rn_op.inputs[0]
new_node = g.make_node("RandomNormalLike",
[shape_node.input[0]],
outputs=[out_name],
name=op_name,
attr={
"mean": mean,
"scale": 1.0,
"dtype": dtype,
"seed": float(seed)
})
else:
shape = g.get_shape(output.output[0])
new_node = g.make_node("RandomNormal", [],
outputs=[out_name],
name=op_name,
attr={
"shape": shape,
"mean": mean,
"scale": 1.0,
"dtype": dtype,
"seed": seed
})
g.replace_all_inputs(output.output[0], new_node.output[0], ops=ops)
g.safe_remove_nodes(match.get_nodes())
return ops
def rewrite_flatten(g, ops):
pattern_fixed_shape_input = \
OpTypePattern('Reshape', name='reshape', inputs=[
OpTypePattern("*", name="input"),
OpTypePattern('Pack', name="pack", inputs=[
OpTypePattern('StridedSlice', name="slice", inputs=[
"*", "*", "*", "*",
]),
"*",
]),
])
pattern_non_fixed_shape_input = \
OpTypePattern('Reshape', name='reshape', inputs=[
OpTypePattern("*", name="input"),
OpTypePattern('Pack', name="pack", inputs=[
OpTypePattern('StridedSlice', name="slice", inputs=[
OpTypePattern('Shape', inputs=[
OpTypePattern("*", name="input2")
]),
"*", "*", "*",
]),
"*",
]),
])
matcher = GraphMatcher(pattern_fixed_shape_input)
match_results_1 = list(matcher.match_ops(ops))
matcher = GraphMatcher(pattern_non_fixed_shape_input)
match_results_2 = list(matcher.match_ops(ops))
match_results = [(match_results_1, True), (match_results_2, False)]
for match_results, check_fixed_input_shape in match_results:
for match in match_results:
input_node = match.get_op('input')
reshape_node = match.get_op('reshape')
pack_node = match.get_op('pack')
slice_node = match.get_op('slice')
need_rewrite = pack_node.inputs[1].is_const() and pack_node.inputs[1].get_tensor_value() == -1
if not need_rewrite:
continue
input_shape = g.get_shape(reshape_node.input[0])
need_rewrite = input_shape is not None
if not need_rewrite:
continue
if check_fixed_input_shape:
need_rewrite = slice_node.inputs[0].is_const() and \
np.array_equal(list(input_shape), list(slice_node.inputs[0].get_tensor_value()))
if not need_rewrite:
continue
begin = slice_node.inputs[1].get_tensor_value(as_list=False)
end = slice_node.inputs[2].get_tensor_value(as_list=False)
strides = slice_node.inputs[3].get_tensor_value(as_list=False)
need_rewrite = np.array_equal(begin, [0]) and len(end) == 1 and \
np.array_equal(strides, [1]) and end[0] - begin[0] == 1
if not need_rewrite:
continue
to_remove = [n for n in match.get_nodes() if n != input_node]
safe = g.safe_to_remove_nodes(to_remove)
# Ok if reshape_node is not safe. Will make it safe later.
if len(to_remove) - len(safe) > 1:
continue
op_name = utils.make_name("Flatten")
out_name = utils.port_name(op_name)
g.make_node("Flatten", [reshape_node.input[0]], outputs=[out_name], name=op_name)
last_dim = input_shape[-1]
sec_last_dim = input_shape[-2]
new_dim = None
if last_dim > 0 and sec_last_dim > 0:
new_dim = last_dim * sec_last_dim
else:
new_dim = -1
g.set_shape(out_name, input_shape[:-2] + [new_dim])
g.replace_all_inputs(reshape_node.output[0], out_name, ops=ops)
for n in to_remove:
g.remove_node(n.name)
return ops