# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.
# flake8: noqa
import argparse
import logging
import numpy as np
import onnx
import sympy
from onnx import helper
from onnx import numpy_helper
from onnx import shape_inference
from packaging import version
assert version.parse(onnx.__version__) >= version.parse("1.8.0")
logger = logging.getLogger(__name__)
def get_attribute(node, attr_name, default_value=None):
found = [attr for attr in node.attribute if attr.name == attr_name]
if found:
return helper.get_attribute_value(found[0])
return default_value
def get_dim_from_proto(dim):
return getattr(dim, dim.WhichOneof('value')) if type(
dim.WhichOneof('value')) == str else None
def is_sequence(type_proto):
cls_type = type_proto.WhichOneof('value')
assert cls_type in ['tensor_type', 'sequence_type']
return cls_type == 'sequence_type'
def get_shape_from_type_proto(type_proto):
assert not is_sequence(type_proto)
if type_proto.tensor_type.HasField('shape'):
return [get_dim_from_proto(d) for d in type_proto.tensor_type.shape.dim]
else:
return None # note no shape is different from shape without dim (scalar)
def get_shape_from_value_info(vi):
cls_type = vi.type.WhichOneof('value')
if cls_type is None:
return None
if is_sequence(vi.type):
if 'tensor_type' == vi.type.sequence_type.elem_type.WhichOneof('value'):
return get_shape_from_type_proto(vi.type.sequence_type.elem_type)
else:
return None
else:
return get_shape_from_type_proto(vi.type)
def make_named_value_info(name):
vi = onnx.ValueInfoProto()
vi.name = name
return vi
def get_shape_from_sympy_shape(sympy_shape):
return [
None if i is None else (int(i) if is_literal(i) else str(i))
for i in sympy_shape
]
def is_literal(dim):
return type(dim) in [int, np.int64, np.int32, sympy.Integer] or (hasattr(
dim, 'is_number') and dim.is_number)
def handle_negative_axis(axis, rank):
assert axis < rank and axis >= -rank
return axis if axis >= 0 else rank + axis
def get_opset(mp, domain=None):
domain = domain or ['', 'onnx', 'ai.onnx']
if type(domain) != list:
domain = [domain]
for opset in mp.opset_import:
if opset.domain in domain:
return opset.version
return None
def as_scalar(x):
if type(x) == list:
assert len(x) == 1
return x[0]
elif type(x) == np.ndarray:
return x.item()
else:
return x
def as_list(x, keep_none):
if type(x) == list:
return x
elif type(x) == np.ndarray:
return list(x)
elif keep_none and x is None:
return None
else:
return [x]
def sympy_reduce_product(x):
if type(x) == list:
value = sympy.Integer(1)
for v in x:
value = value * v
else:
value = x
return value
class SymbolicShapeInference:
def __init__(self,
int_max,
auto_merge,
guess_output_rank,
verbose,
prefix=''):
self.dispatcher_ = {
'Add':
self._infer_symbolic_compute_ops,
'ArrayFeatureExtractor':
self._infer_ArrayFeatureExtractor,
'AveragePool':
self._infer_Pool,
'BatchNormalization':
self._infer_BatchNormalization,
'Cast':
self._infer_Cast,
'CategoryMapper':
self._infer_CategoryMapper,
'Compress':
self._infer_Compress,
'Concat':
self._infer_Concat,
'ConcatFromSequence':
self._infer_ConcatFromSequence,
'Constant':
self._infer_Constant,
'ConstantOfShape':
self._infer_ConstantOfShape,
'Conv':
self._infer_Conv,
'CumSum':
self._pass_on_shape_and_type,
'Div':
self._infer_symbolic_compute_ops,
'Einsum':
self._infer_Einsum,
'Expand':
self._infer_Expand,
'Equal':
self._infer_symbolic_compute_ops,
'Floor':
self._infer_symbolic_compute_ops,
'Gather':
self._infer_Gather,
'GatherElements':
self._infer_GatherElements,
'GatherND':
self._infer_GatherND,
'Gelu':
self._pass_on_shape_and_type,
'If':
self._infer_If,
'Loop':
self._infer_Loop,
'MatMul':
self._infer_MatMul,
'MatMulInteger16':
self._infer_MatMulInteger,
'MaxPool':
self._infer_Pool,
'Max':
self._infer_symbolic_compute_ops,
'Min':
self._infer_symbolic_compute_ops,
'Mul':
self._infer_symbolic_compute_ops,
'NonMaxSuppression':
self._infer_NonMaxSuppression,
'NonZero':
self._infer_NonZero,
'OneHot':
self._infer_OneHot,
'Pad':
self._infer_Pad,
'Range':
self._infer_Range,
'Reciprocal':
self._pass_on_shape_and_type,
'ReduceSum':
self._infer_ReduceSum,
'ReduceProd':
self._infer_ReduceProd,
'Reshape':
self._infer_Reshape,
'Resize':
self._infer_Resize,
'Round':
self._pass_on_shape_and_type,
'Scan':
self._infer_Scan,
'ScatterElements':
self._infer_ScatterElements,
'SequenceAt':
self._infer_SequenceAt,
'SequenceInsert':
self._infer_SequenceInsert,
'Shape':
self._infer_Shape,
'Size':
self._infer_Size,
'Slice':
self._infer_Slice,
'SoftmaxCrossEntropyLoss':
self._infer_SoftmaxCrossEntropyLoss,
'SoftmaxCrossEntropyLossInternal':
self._infer_SoftmaxCrossEntropyLoss,
'NegativeLogLikelihoodLossInternal':
self._infer_SoftmaxCrossEntropyLoss,
'Split':
self._infer_Split,
'SplitToSequence':
self._infer_SplitToSequence,
'Squeeze':
self._infer_Squeeze,
'Sub':
self._infer_symbolic_compute_ops,
'Tile':
self._infer_Tile,
'TopK':
self._infer_TopK,
'Transpose':
self._infer_Transpose,
'Unsqueeze':
self._infer_Unsqueeze,
'Where':
self._infer_symbolic_compute_ops,
'ZipMap':
self._infer_ZipMap,
'Neg':
self._infer_symbolic_compute_ops,
# contrib ops:
'Attention':
self._infer_Attention,
'BiasGelu':
self._infer_BiasGelu,
'EmbedLayerNormalization':
self._infer_EmbedLayerNormalization,
'FastGelu':
self._infer_FastGelu,
'Gelu':
self._infer_Gelu,
'LayerNormalization':
self._infer_LayerNormalization,
'LongformerAttention':
self._infer_LongformerAttention,
'PythonOp':
self._infer_PythonOp,
'SkipLayerNormalization':
self._infer_SkipLayerNormalization
}
self.aten_op_dispatcher_ = {
'aten::embedding': self._infer_Gather,
'aten::bitwise_or': self._infer_aten_bitwise_or,
'aten::diagonal': self._infer_aten_diagonal,
'aten::max_pool2d_with_indices': self._infer_aten_pool2d,
'aten::multinomial': self._infer_aten_multinomial,
'aten::unfold': self._infer_aten_unfold,
'aten::argmax': self._infer_aten_argmax,
'aten::avg_pool2d': self._infer_aten_pool2d,
'aten::_adaptive_avg_pool2d': self._infer_aten_pool2d,
'aten::binary_cross_entropy_with_logits': self._infer_aten_bce,
'aten::numpy_T': self._infer_Transpose,
}
self.run_ = True
self.suggested_merge_ = {}
self.symbolic_dims_ = {}
self.input_symbols_ = {}
self.auto_merge_ = auto_merge
self.guess_output_rank_ = guess_output_rank
self.verbose_ = verbose
self.int_max_ = int_max
self.subgraph_id_ = 0
self.prefix_ = prefix
def _add_suggested_merge(self, symbols, apply=False):
assert all([(type(s) == str and s in self.symbolic_dims_) or
is_literal(s) for s in symbols])
symbols = set(symbols)
for k, v in self.suggested_merge_.items():
if k in symbols:
symbols.remove(k)
symbols.add(v)
map_to = None
# if there is literal, map to it first
for s in symbols:
if is_literal(s):
map_to = s
break
# when no literals, map to input symbolic dims, then existing symbolic dims
if map_to is None:
for s in symbols:
if s in self.input_symbols_:
map_to = s
break
if map_to is None:
for s in symbols:
if type(self.symbolic_dims_[s]) == sympy.Symbol:
map_to = s
break
# when nothing to map to, use the shorter one
if map_to is None:
if self.verbose_ > 0:
logger.warning(
'Potential unsafe merge between symbolic expressions: ({})'.
format(','.join(symbols)))
symbols_list = list(symbols)
lens = [len(s) for s in symbols_list]
map_to = symbols_list[lens.index(min(lens))]
symbols.remove(map_to)
for s in symbols:
if s == map_to:
continue
if is_literal(map_to) and is_literal(s):
assert int(map_to) == int(s)
self.suggested_merge_[s] = int(map_to) if is_literal(
map_to) else map_to
for k, v in self.suggested_merge_.items():
if v == s:
self.suggested_merge_[k] = map_to
if apply and self.auto_merge_:
self._apply_suggested_merge()
def _apply_suggested_merge(self, graph_input_only=False):
if not self.suggested_merge_:
return
for i in list(self.out_mp_.graph.input) + (
[] if graph_input_only else list(self.out_mp_.graph.value_info)):
for d in i.type.tensor_type.shape.dim:
if d.dim_param in self.suggested_merge_:
v = self.suggested_merge_[d.dim_param]
if is_literal(v):
d.dim_value = int(v)
else:
d.dim_param = v
def _preprocess(self, in_mp):
self.out_mp_ = onnx.ModelProto()
self.out_mp_.CopyFrom(in_mp)
self.graph_inputs_ = dict(
[(i.name, i) for i in list(self.out_mp_.graph.input)])
self.initializers_ = dict(
[(i.name, i) for i in self.out_mp_.graph.initializer])
self.known_vi_ = dict(
[(i.name, i) for i in list(self.out_mp_.graph.input)])
self.known_vi_.update(
dict([(i.name, helper.make_tensor_value_info(i.name, i.data_type,
list(i.dims)))
for i in self.out_mp_.graph.initializer]))
def _merge_symbols(self, dims):
if not all([type(d) == str for d in dims]):
if self.auto_merge_:
unique_dims = list(set(dims))
is_int = [is_literal(d) for d in unique_dims]
assert sum(
is_int
) <= 1 # if there are more than 1 unique ints, something is wrong
if sum(is_int) == 1:
int_dim = is_int.index(1)
if self.verbose_ > 0:
logger.debug('dim {} has been merged with value {}'.
format(unique_dims[:int_dim] + unique_dims[
int_dim + 1:], unique_dims[int_dim]))
self._check_merged_dims(unique_dims, allow_broadcast=False)
return unique_dims[int_dim]
else:
if self.verbose_ > 0:
logger.debug('dim {} has been mergd with dim {}'.format(
unique_dims[1:], unique_dims[0]))
return dims[0]
else:
return None
if all([d == dims[0] for d in dims]):
return dims[0]
merged = [
self.suggested_merge_[d] if d in self.suggested_merge_ else d
for d in dims
]
if all([d == merged[0] for d in merged]):
assert merged[0] in self.symbolic_dims_
return merged[0]
else:
return None
# broadcast from right to left, and merge symbolic dims if needed
def _broadcast_shapes(self, shape1, shape2):
new_shape = []
rank1 = len(shape1)
rank2 = len(shape2)
new_rank = max(rank1, rank2)
for i in range(new_rank):
dim1 = shape1[rank1 - 1 - i] if i < rank1 else 1
dim2 = shape2[rank2 - 1 - i] if i < rank2 else 1
if dim1 == 1 or dim1 == dim2:
new_dim = dim2
elif dim2 == 1:
new_dim = dim1
else:
new_dim = self._merge_symbols([dim1, dim2])
if not new_dim:
# warning about unsupported broadcast when not auto merge
# note that auto merge has the risk of incorrectly merge symbols while one of them being 1
# for example, 'a' = 1, 'b' = 5 at runtime is valid broadcasting, but with auto merge 'a' == 'b'
if self.auto_merge_:
self._add_suggested_merge([dim1, dim2], apply=True)
else:
logger.warning('unsupported broadcast between ' + str(
dim1) + ' ' + str(dim2))
new_shape = [new_dim] + new_shape
return new_shape
def _get_shape(self, node, idx):
name = node.input[idx]
if name in self.known_vi_:
vi = self.known_vi_[name]
return get_shape_from_value_info(vi)
else:
assert name in self.initializers_
return list(self.initializers_[name].dims)
def _get_shape_rank(self, node, idx):
return len(self._get_shape(node, idx))
def _get_sympy_shape(self, node, idx):
sympy_shape = []
for d in self._get_shape(node, idx):
if type(d) == str:
sympy_shape.append(self.symbolic_dims_[d] if d in
self.symbolic_dims_ else sympy.Symbol(
d, integer=True, nonnegative=True))
else:
assert None != d
sympy_shape.append(d)
return sympy_shape
def _get_value(self, node, idx):
name = node.input[idx]
assert name in self.sympy_data_ or name in self.initializers_
return self.sympy_data_[
name] if name in self.sympy_data_ else numpy_helper.to_array(
self.initializers_[name])
def _try_get_value(self, node, idx):
if idx >= len(node.input):
return None
name = node.input[idx]
if name in self.sympy_data_ or name in self.initializers_:
return self._get_value(node, idx)
return None
def _update_computed_dims(self, new_sympy_shape):
for i, new_dim in enumerate(new_sympy_shape):
if not is_literal(new_dim) and not type(new_dim) == str:
str_dim = str(new_dim)
if str_dim in self.suggested_merge_:
if is_literal(self.suggested_merge_[str_dim]):
continue # no need to create dim for literals
new_sympy_shape[i] = self.symbolic_dims_[
self.suggested_merge_[str_dim]]
else:
# add new_dim if it's a computational expression
if not str(new_dim) in self.symbolic_dims_:
self.symbolic_dims_[str(new_dim)] = new_dim
def _onnx_infer_single_node(self, node):
# skip onnx shape inference for some ops, as they are handled in _infer_*
skip_infer = node.op_type in [
'If', 'Loop', 'Scan', 'SplitToSequence', 'ZipMap', \
# contrib ops
'Attention', 'BiasGelu', \
'EmbedLayerNormalization', \
'FastGelu', 'Gelu', 'LayerNormalization', \
'LongformerAttention', \
'SkipLayerNormalization', \
'PythonOp'
]
if not skip_infer:
# Only pass initializers that satisfy the following condition:
# (1) Operator need value of some input for shape inference.
# For example, Unsqueeze in opset 13 uses the axes input to calculate shape of output.
# (2) opset version >= 9. In older version, initializer is required in graph input by onnx spec.
# (3) The initializer is not in graph input. The means the node input is "constant" in inference.
initializers = []
if (get_opset(self.out_mp_) >= 9) and node.op_type in ['Unsqueeze']:
initializers = [
self.initializers_[name] for name in node.input
if (name in self.initializers_ and
name not in self.graph_inputs_)
]
# run single node inference with self.known_vi_ shapes
tmp_graph = helper.make_graph(
[node], 'tmp', [self.known_vi_[i] for i in node.input if i],
[make_named_value_info(i) for i in node.output], initializers)
self.tmp_mp_.graph.CopyFrom(tmp_graph)
self.tmp_mp_ = shape_inference.infer_shapes(self.tmp_mp_)
for i_o in range(len(node.output)):
o = node.output[i_o]
vi = self.out_mp_.graph.value_info.add()
if not skip_infer:
vi.CopyFrom(self.tmp_mp_.graph.output[i_o])
else:
vi.name = o
self.known_vi_[o] = vi
def _onnx_infer_subgraph(self,
node,
subgraph,
use_node_input=True,
inc_subgraph_id=True):
if self.verbose_ > 2:
logger.debug(
'Inferencing subgraph of node {} with output({}...): {}'.format(
node.name, node.output[0], node.op_type))
# node inputs are not passed directly to the subgraph
# it's up to the node dispatcher to prepare subgraph input
# for example, with Scan/Loop, subgraph input shape would be trimmed from node input shape
# besides, inputs in subgraph could shadow implicit inputs
subgraph_inputs = set(
[i.name for i in list(subgraph.initializer) + list(subgraph.input)])
subgraph_implicit_input = set([
name for name in self.known_vi_.keys()
if not name in subgraph_inputs
])
tmp_graph = helper.make_graph(
list(subgraph.node), 'tmp',
list(subgraph.input) +
[self.known_vi_[i] for i in subgraph_implicit_input],
[make_named_value_info(i.name) for i in subgraph.output])
tmp_graph.initializer.extend([
i for i in self.out_mp_.graph.initializer
if i.name in subgraph_implicit_input
])
tmp_graph.initializer.extend(subgraph.initializer)
self.tmp_mp_.graph.CopyFrom(tmp_graph)
symbolic_shape_inference = SymbolicShapeInference(
self.int_max_,
self.auto_merge_,
self.guess_output_rank_,
self.verbose_,
prefix=self.prefix_ + '_' + str(self.subgraph_id_))
if inc_subgraph_id:
self.subgraph_id_ += 1
all_shapes_inferred = False
symbolic_shape_inference._preprocess(self.tmp_mp_)
symbolic_shape_inference.suggested_merge_ = self.suggested_merge_.copy()
while symbolic_shape_inference.run_:
all_shapes_inferred = symbolic_shape_inference._infer_impl(
self.sympy_data_.copy())
symbolic_shape_inference._update_output_from_vi()
if use_node_input:
# if subgraph uses node input, it needs to update to merged dims
subgraph.ClearField('input')
subgraph.input.extend(
symbolic_shape_inference.out_mp_.graph.input[:len(node.input)])
subgraph.ClearField('output')
subgraph.output.extend(symbolic_shape_inference.out_mp_.graph.output)
subgraph.ClearField('value_info')
subgraph.value_info.extend(
symbolic_shape_inference.out_mp_.graph.value_info)
subgraph.ClearField('node')
subgraph.node.extend(symbolic_shape_inference.out_mp_.graph.node)
# for new symbolic dims from subgraph output, add to main graph symbolic dims
subgraph_shapes = [
get_shape_from_value_info(o)
for o in symbolic_shape_inference.out_mp_.graph.output
]
subgraph_new_symbolic_dims = set([
d for s in subgraph_shapes if s for d in s
if type(d) == str and not d in self.symbolic_dims_
])
new_dims = {}
for d in subgraph_new_symbolic_dims:
assert d in symbolic_shape_inference.symbolic_dims_
new_dims[d] = symbolic_shape_inference.symbolic_dims_[d]
self.symbolic_dims_.update(new_dims)
return symbolic_shape_inference
def _get_int_values(self, node, broadcast=False):
values = [self._try_get_value(node, i) for i in range(len(node.input))]
if all([v is not None for v in values]):
# some shape compute is in floating point, cast to int for sympy
for i, v in enumerate(values):
if type(v) != np.ndarray:
continue
if len(v.shape) > 1:
new_v = None # ignore value for rank > 1
elif len(v.shape) == 0:
new_v = int(v.item())
else:
assert len(v.shape) == 1
new_v = [int(vv) for vv in v]
values[i] = new_v
values_len = [len(v) if type(v) == list else 0 for v in values]
max_len = max(values_len)
if max_len >= 1 and broadcast:
# broadcast
for i, v in enumerate(values):
if v is None:
continue # don't broadcast if value is unknown
if type(v) == list:
if len(v) < max_len:
values[i] = v * max_len
else:
assert len(v) == max_len
else:
values[i] = [v] * max_len
return values
def _compute_on_sympy_data(self, node, op_func):
assert len(node.output) == 1
values = self._get_int_values(node, broadcast=True)
if all([v is not None for v in values]):
is_list = [type(v) == list for v in values]
as_list = any(is_list)
if as_list:
self.sympy_data_[node.output[
0]] = [op_func(vs) for vs in zip(*values)]
else:
self.sympy_data_[node.output[0]] = op_func(values)
def _pass_on_sympy_data(self, node):
assert len(
node.
input) == 1 or node.op_type in ['Reshape', 'Unsqueeze', 'Squeeze']
self._compute_on_sympy_data(node, lambda x: x[0])
def _pass_on_shape_and_type(self, node):
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type,
self._get_shape(node, 0)))
def _new_symbolic_dim(self, prefix, dim):
new_dim = '{}_d{}'.format(prefix, dim)
if new_dim in self.suggested_merge_:
v = self.suggested_merge_[new_dim]
new_symbolic_dim = sympy.Integer(int(v)) if is_literal(v) else v
else:
new_symbolic_dim = sympy.Symbol(
new_dim, integer=True, nonnegative=True)
self.symbolic_dims_[new_dim] = new_symbolic_dim
return new_symbolic_dim
def _new_symbolic_dim_from_output(self, node, out_idx=0, dim=0):
return self._new_symbolic_dim('{}{}_{}_o{}_'.format(
node.op_type, self.prefix_,
list(self.out_mp_.graph.node).index(node), out_idx), dim)
def _new_symbolic_shape(self, rank, node, out_idx=0):
return [
self._new_symbolic_dim_from_output(node, out_idx, i)
for i in range(rank)
]
def _compute_conv_pool_shape(self, node):
sympy_shape = self._get_sympy_shape(node, 0)
if len(node.input) > 1:
W_shape = self._get_sympy_shape(node, 1)
rank = len(W_shape) - 2 # number of spatial axes
kernel_shape = W_shape[-rank:]
sympy_shape[1] = W_shape[0]
else:
W_shape = None
kernel_shape = get_attribute(node, 'kernel_shape')
rank = len(kernel_shape)
assert len(sympy_shape) == rank + 2
# only need to symbolic shape inference if input has symbolic dims in spatial axes
is_symbolic_dims = [not is_literal(i) for i in sympy_shape[-rank:]]
if not any(is_symbolic_dims):
shape = get_shape_from_value_info(self.known_vi_[node.output[0]])
if len(shape) > 0:
assert len(sympy_shape) == len(shape)
sympy_shape[-rank:] = [sympy.Integer(d) for d in shape[-rank:]]
return sympy_shape
dilations = get_attribute(node, 'dilations', [1] * rank)
strides = get_attribute(node, 'strides', [1] * rank)
effective_kernel_shape = [(k - 1) * d + 1
for k, d in zip(kernel_shape, dilations)]
pads = get_attribute(node, 'pads')
if pads is None:
pads = [0] * (2 * rank)
auto_pad = get_attribute(node, 'auto_pad',
b'NOTSET').decode('utf-8')
if auto_pad != 'VALID' and auto_pad != 'NOTSET':
try:
residual = [
sympy.Mod(d, s)
for d, s in zip(sympy_shape[-rank:], strides)
]
total_pads = [
max(0, (k - s) if r == 0 else (k - r)) for k, s, r in
zip(effective_kernel_shape, strides, residual)
]
except TypeError: # sympy may throw TypeError: cannot determine truth value of Relational
total_pads = [
max(0, (k - s))
for k, s in zip(effective_kernel_shape, strides)
] # assuming no residual if sympy throws error
elif auto_pad == 'VALID':
total_pads = []
else:
total_pads = [0] * rank
else:
assert len(pads) == 2 * rank
total_pads = [p1 + p2 for p1, p2 in zip(pads[:rank], pads[rank:])]
ceil_mode = get_attribute(node, 'ceil_mode', 0)
for i in range(rank):
effective_input_size = sympy_shape[-rank + i]
if len(total_pads) > 0:
effective_input_size = effective_input_size + total_pads[i]
if ceil_mode:
strided_kernel_positions = sympy.ceiling(
(effective_input_size - effective_kernel_shape[i]) /
strides[i])
else:
strided_kernel_positions = (
effective_input_size - effective_kernel_shape[i]
) // strides[i]
sympy_shape[-rank + i] = strided_kernel_positions + 1
return sympy_shape
def _check_merged_dims(self, dims, allow_broadcast=True):
if allow_broadcast:
dims = [d for d in dims if not (is_literal(d) and int(d) <= 1)]
if not all([d == dims[0] for d in dims]):
self._add_suggested_merge(dims, apply=True)
def _compute_matmul_shape(self, node, output_dtype=None):
lhs_shape = self._get_shape(node, 0)
rhs_shape = self._get_shape(node, 1)
lhs_rank = len(lhs_shape)
rhs_rank = len(rhs_shape)
lhs_reduce_dim = 0
rhs_reduce_dim = 0
assert lhs_rank > 0 and rhs_rank > 0
if lhs_rank == 1 and rhs_rank == 1:
new_shape = []
elif lhs_rank == 1:
rhs_reduce_dim = -2
new_shape = rhs_shape[:rhs_reduce_dim] + [rhs_shape[-1]]
elif rhs_rank == 1:
lhs_reduce_dim = -1
new_shape = lhs_shape[:lhs_reduce_dim]
else:
lhs_reduce_dim = -1
rhs_reduce_dim = -2
new_shape = self._broadcast_shapes(
lhs_shape[:-2],
rhs_shape[:-2]) + [lhs_shape[-2]] + [rhs_shape[-1]]
# merge reduce dim
self._check_merged_dims(
[lhs_shape[lhs_reduce_dim], rhs_shape[rhs_reduce_dim]],
allow_broadcast=False)
if output_dtype is None:
# infer output_dtype from input type when not specified
output_dtype = self.known_vi_[node.input[
0]].type.tensor_type.elem_type
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], output_dtype,
new_shape))
def _fuse_tensor_type(self, node, out_idx, dst_type, src_type):
'''
update dst_tensor_type to be compatible with src_tensor_type when dimension mismatches
'''
dst_tensor_type = dst_type.sequence_type.elem_type.tensor_type if is_sequence(
dst_type) else dst_type.tensor_type
src_tensor_type = src_type.sequence_type.elem_type.tensor_type if is_sequence(
src_type) else src_type.tensor_type
if dst_tensor_type.elem_type != src_tensor_type.elem_type:
node_id = node.name if node.name else node.op_type
raise ValueError(
f"For node {node_id}, dst_tensor_type.elem_type != src_tensor_type.elem_type: "
f"{onnx.onnx_pb.TensorProto.DataType.Name(dst_tensor_type.elem_type)} vs "
f"{onnx.onnx_pb.TensorProto.DataType.Name(src_tensor_type.elem_type)}"
)
if dst_tensor_type.HasField('shape'):
for di, ds in enumerate(
zip(dst_tensor_type.shape.dim, src_tensor_type.shape.dim)):
if ds[0] != ds[1]:
# create a new symbolic dimension for node/out_idx/mismatch dim id in dst_tensor_type for tensor_type
# for sequence_type, clear the dimension
new_dim = onnx.TensorShapeProto.Dimension()
if not is_sequence(dst_type):
new_dim.dim_param = str(
self._new_symbolic_dim_from_output(node, out_idx,
di))
dst_tensor_type.shape.dim[di].CopyFrom(new_dim)
else:
dst_tensor_type.CopyFrom(src_tensor_type)
def _infer_ArrayFeatureExtractor(self, node):
data_shape = self._get_shape(node, 0)
indices_shape = self._get_shape(node, 1)
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type, data_shape[:-1] +
indices_shape))
def _infer_symbolic_compute_ops(self, node):
funcs = {
'Add':
lambda l: l[0] + l[1],
'Div':
lambda l: l[0] // l[1], # integer div in sympy
'Equal':
lambda l: l[0] == l[1],
'Floor':
lambda l: sympy.floor(l[0]),
'Max':
lambda l: l[1] if is_literal(l[0]) and int(l[0]) < -self.int_max_ else (l[0] if is_literal(l[1]) and int(l[1]) < -self.int_max_ else sympy.Max(l[0], l[1])),
'Min':
lambda l: l[1] if is_literal(l[0]) and int(l[0]) > self.int_max_ else (l[0] if is_literal(l[1]) and int(l[1]) > self.int_max_ else sympy.Min(l[0], l[1])),
'Mul':
lambda l: l[0] * l[1],
'Sub':
lambda l: l[0] - l[1],
'Where':
lambda l: l[1] if l[0] else l[2],
'Neg':
lambda l: -l[0]
}
assert node.op_type in funcs
self._compute_on_sympy_data(node, funcs[node.op_type])
def _infer_Cast(self, node):
self._pass_on_sympy_data(node)
def _infer_CategoryMapper(self, node):
input_type = self.known_vi_[node.input[0]].type.tensor_type.elem_type
if input_type == onnx.TensorProto.STRING:
output_type = onnx.TensorProto.INT64
else:
output_type = onnx.TensorProto.STRING
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], output_type,
self._get_shape(node, 0)))
def _infer_Compress(self, node):
input_shape = self._get_shape(node, 0)
# create a new symbolic dimension for Compress output
compress_len = str(self._new_symbolic_dim_from_output(node))
axis = get_attribute(node, 'axis')
if axis == None:
# when axis is not specified, input is flattened before compress so output is 1D
output_shape = [compress_len]
else:
output_shape = input_shape
output_shape[handle_negative_axis(axis, len(
input_shape))] = compress_len
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type, output_shape))
def _infer_Concat(self, node):
if any([
i in self.sympy_data_ or i in self.initializers_
for i in node.input
]):
values = self._get_int_values(node)
print("=======", values, node.name, get_attribute(node, 'axis'))
if all([v is not None for v in values]):
axis = get_attribute(node, 'axis')
if axis < 0:
axis = axis + len(values[0])
assert 0 == axis
self.sympy_data_[node.output[0]] = []
for i in range(len(node.input)):
value = values[i]
if type(value) == list:
self.sympy_data_[node.output[0]].extend(value)
else:
self.sympy_data_[node.output[0]].append(value)
sympy_shape = self._get_sympy_shape(node, 0)
axis = handle_negative_axis(
get_attribute(node, 'axis'), len(sympy_shape))
for i_idx in range(1, len(node.input)):
input_shape = self._get_sympy_shape(node, i_idx)
if input_shape:
sympy_shape[axis] = sympy_shape[axis] + input_shape[axis]
self._update_computed_dims(sympy_shape)
# merge symbolic dims for non-concat axes
for d in range(len(sympy_shape)):
if d == axis:
continue
dims = [
self._get_shape(node, i_idx)[d]
for i_idx in range(len(node.input))
if self._get_shape(node, i_idx)
]
if all([d == dims[0] for d in dims]):
continue
merged = self._merge_symbols(dims)
if type(merged) == str:
sympy_shape[d] = self.symbolic_dims_[merged] if merged else None
else:
sympy_shape[d] = merged
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], self.known_vi_[node.input[0]].type.tensor_type.
elem_type, get_shape_from_sympy_shape(sympy_shape)))
def _infer_ConcatFromSequence(self, node):
seq_shape = self._get_shape(node, 0)
new_axis = 1 if get_attribute(node, 'new_axis') else 0
axis = handle_negative_axis(
get_attribute(node, 'axis'), len(seq_shape) + new_axis)
concat_dim = str(self._new_symbolic_dim_from_output(node, 0, axis))
new_shape = seq_shape
if new_axis:
new_shape = seq_shape[:axis] + [concat_dim] + seq_shape[axis:]
else:
new_shape[axis] = concat_dim
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], self.known_vi_[node.input[0]]
.type.sequence_type.elem_type.tensor_type.elem_type, new_shape))
def _infer_Constant(self, node):
t = get_attribute(node, 'value')
self.sympy_data_[node.output[0]] = numpy_helper.to_array(t)
def _infer_ConstantOfShape(self, node):
sympy_shape = self._get_int_values(node)[0]
vi = self.known_vi_[node.output[0]]
if sympy_shape is not None:
if type(sympy_shape) != list:
sympy_shape = [sympy_shape]
self._update_computed_dims(sympy_shape)
# update sympy data if output type is int, and shape is known
if vi.type.tensor_type.elem_type == onnx.TensorProto.INT64 and all(
[is_literal(x) for x in sympy_shape]):
self.sympy_data_[node.output[0]] = np.ones(
[int(x) for x in sympy_shape],
dtype=np.int64) * numpy_helper.to_array(
get_attribute(node, 'value', 0))
else:
# create new dynamic shape
# note input0 is a 1D vector of shape, the new symbolic shape has the rank of the shape vector length
sympy_shape = self._new_symbolic_shape(
self._get_shape(node, 0)[0], node)
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], vi.type.tensor_type.elem_type,
get_shape_from_sympy_shape(sympy_shape)))
def _infer_Conv(self, node):
sympy_shape = self._compute_conv_pool_shape(node)
self._update_computed_dims(sympy_shape)
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], vi.type.tensor_type.elem_type,
get_shape_from_sympy_shape(sympy_shape)))
def _infer_Einsum(self, node):
# ref:https://github.com/onnx/onnx/blob/623dfaa0151b2e4ce49779c3ec31cbd78c592b80/onnx/defs/math/defs.cc#L3275
equation = get_attribute(node, 'equation')
equation = equation.replace(b' ', b'')
mid_index = equation.find(b'->')
left_equation = equation[:mid_index] if mid_index != -1 else equation
num_operands = 0
num_ellipsis = 0
num_ellipsis_indices = 0
letter_to_dim = {}
terms = left_equation.split(b',')
for term in terms:
ellipsis_index = term.find(b'...')
shape = self._get_shape(node, num_operands)
rank = len(shape)
if ellipsis_index != -1:
if num_ellipsis == 0:
num_ellipsis_indices = rank - len(term) + 3
num_ellipsis = num_ellipsis + 1
for i in range(1, rank + 1):
letter = term[-i]
if letter != 46: # letter != b'.'
dim = shape[-i]
if letter not in letter_to_dim.keys():
letter_to_dim[letter] = dim
elif type(dim) != sympy.Symbol:
letter_to_dim[letter] = dim
num_operands = num_operands + 1
new_sympy_shape = []
from collections import OrderedDict
num_letter_occurrences = OrderedDict()
if mid_index != -1:
right_equation = equation[mid_index + 2:]
right_ellipsis_index = right_equation.find(b'...')
if right_ellipsis_index != -1:
for i in range(num_ellipsis_indices):
new_sympy_shape.append(shape[i])
for c in right_equation:
if c != 46: # c != b'.'
new_sympy_shape.append(letter_to_dim[c])
else:
for i in range(num_ellipsis_indices):
new_sympy_shape.append(shape[i])
for c in left_equation:
if c != 44 and c != 46: # c != b',' and c != b'.':
if c in num_letter_occurrences:
num_letter_occurrences[c] = num_letter_occurrences[
c] + 1
else:
num_letter_occurrences[c] = 1
for key, value in num_letter_occurrences.items():
if value == 1:
new_sympy_shape.append(letter_to_dim[key])
output_dtype = self.known_vi_[node.input[0]].type.tensor_type.elem_type
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], output_dtype,
new_sympy_shape))
def _infer_Expand(self, node):
expand_to_shape = as_list(self._try_get_value(node, 1), keep_none=True)
if expand_to_shape is not None:
# new_shape's dim can come from shape value
self._update_computed_dims(expand_to_shape)
shape = self._get_shape(node, 0)
new_shape = self._broadcast_shapes(
shape, get_shape_from_sympy_shape(expand_to_shape))
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type, new_shape))
def _infer_Gather(self, node):
data_shape = self._get_shape(node, 0)
axis = handle_negative_axis(
get_attribute(node, 'axis', 0), len(data_shape))
indices_shape = self._get_shape(node, 1)
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type, data_shape[:axis] +
indices_shape + data_shape[axis +
1:]))
# for 1D input, do some sympy compute
if node.input[0] in self.sympy_data_ and len(
data_shape) == 1 and 0 == get_attribute(node, 'axis', 0):
idx = self._try_get_value(node, 1)
if idx is not None:
data = self.sympy_data_[node.input[0]]
if type(data) == list:
if type(idx) == np.ndarray and len(idx.shape) == 1:
self.sympy_data_[node.output[
0]] = [data[int(i)] for i in idx]
else:
self.sympy_data_[node.output[0]] = data[int(idx)]
else:
assert idx == 0 or idx == -1
self.sympy_data_[node.output[0]] = data
def _infer_GatherElements(self, node):
indices_shape = self._get_shape(node, 1)
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type, indices_shape))
def _infer_GatherND(self, node):
data_shape = self._get_shape(node, 0)
data_rank = len(data_shape)
indices_shape = self._get_shape(node, 1)
indices_rank = len(indices_shape)
last_index_dimension = indices_shape[-1]
assert is_literal(
last_index_dimension) and last_index_dimension <= data_rank
new_shape = indices_shape[:-1] + data_shape[last_index_dimension:]
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type, new_shape))
def _infer_If(self, node):
# special case for constant condition, in case there are mismatching shape from the non-executed branch
subgraphs = [
get_attribute(node, 'then_branch'), get_attribute(node,
'else_branch')
]
cond = self._try_get_value(node, 0)
if cond is not None:
if as_scalar(cond) > 0:
subgraphs[1].CopyFrom(subgraphs[0])
else:
subgraphs[0].CopyFrom(subgraphs[1])
for i_sub, subgraph in enumerate(subgraphs):
subgraph_infer = self._onnx_infer_subgraph(
node, subgraph, use_node_input=False)
for i_out in range(len(node.output)):
vi = self.known_vi_[node.output[i_out]]
if i_sub == 0:
vi.CopyFrom(subgraph.output[i_out])
vi.name = node.output[i_out]
else:
self._fuse_tensor_type(node, i_out, vi.type,
subgraph.output[i_out].type)
# pass on sympy data from subgraph, if cond is constant
if cond is not None and i_sub == (0 if as_scalar(cond) > 0 else
1):
if subgraph.output[
i_out].name in subgraph_infer.sympy_data_:
self.sympy_data_[vi.name] = subgraph_infer.sympy_data_[
subgraph.output[i_out].name]
def _infer_Loop(self, node):
subgraph = get_attribute(node, 'body')
assert len(subgraph.input) == len(node.input)
num_loop_carried = len(
node.input) - 2 # minus the length and initial loop condition
# when sequence_type is used as loop carried input
# needs to run subgraph infer twice if the tensor shape in sequence contains None
for i, si in enumerate(subgraph.input):
si_name = si.name
si.CopyFrom(self.known_vi_[node.input[i]])
si.name = si_name
self._onnx_infer_subgraph(node, subgraph)
# check subgraph input/output for shape changes in loop carried variables
# for tensor_type, create new symbolic dim when changing, i.e., output = Concat(input, a)
# for sequence_type, propagate from output to input
need_second_infer = False
for i_out in range(1, num_loop_carried + 1):
so = subgraph.output[i_out]
so_shape = get_shape_from_value_info(so)
if is_sequence(so.type):
if so_shape and None in so_shape:
# copy shape from output to input
# note that loop input is [loop_len, cond, input_0, input_1, ...]
# while loop output is [cond, output_0, output_1, ...]
subgraph.input[i_out +
1].type.sequence_type.elem_type.CopyFrom(
so.type.sequence_type.elem_type)
need_second_infer = True
else:
si = subgraph.input[i_out + 1]
si_shape = get_shape_from_value_info(si)
for di, dims in enumerate(zip(si_shape, so_shape)):
if dims[0] != dims[1]:
new_dim = onnx.TensorShapeProto.Dimension()
new_dim.dim_param = str(
self._new_symbolic_dim_from_output(node, i_out, di))
si.type.tensor_type.shape.dim[di].CopyFrom(new_dim)
so.type.tensor_type.shape.dim[di].CopyFrom(new_dim)
need_second_infer = True
if need_second_infer:
if self.verbose_ > 2:
logger.debug(
"Rerun Loop: {}({}...), because of sequence in loop carried variables".
format(node.name, node.output[0]))
self._onnx_infer_subgraph(node, subgraph, inc_subgraph_id=False)
# create a new symbolic dimension for iteration dependent dimension
loop_iter_dim = str(self._new_symbolic_dim_from_output(node))
for i in range(len(node.output)):
vi = self.known_vi_[node.output[i]]
vi.CopyFrom(subgraph.output[
i +
1]) # first subgraph output is condition, not in node output
if i >= num_loop_carried:
assert not is_sequence(
vi.type) # TODO: handle loop accumulation in sequence_type
subgraph_vi_dim = subgraph.output[i +
1].type.tensor_type.shape.dim
vi.type.tensor_type.shape.ClearField('dim')
vi_dim = vi.type.tensor_type.shape.dim
vi_dim.add().dim_param = loop_iter_dim
vi_dim.extend(list(subgraph_vi_dim))
vi.name = node.output[i]
def _infer_MatMul(self, node):
self._compute_matmul_shape(node)
def _infer_MatMulInteger(self, node):
self._compute_matmul_shape(node, onnx.TensorProto.INT32)
def _infer_NonMaxSuppression(self, node):
selected = str(self._new_symbolic_dim_from_output(node))
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[
0], onnx.TensorProto.INT64, [selected, 3]))
def _infer_NonZero(self, node):
input_rank = self._get_shape_rank(node, 0)
# create a new symbolic dimension for NonZero output
nz_len = str(self._new_symbolic_dim_from_output(node, 0, 1))
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[
0], vi.type.tensor_type.elem_type, [input_rank, nz_len]))
def _infer_OneHot(self, node):
sympy_shape = self._get_sympy_shape(node, 0)
depth = self._try_get_value(node, 1)
axis = get_attribute(node, 'axis', -1)
axis = handle_negative_axis(axis, len(sympy_shape) + 1)
new_shape = get_shape_from_sympy_shape(sympy_shape[:axis] + [
self._new_symbolic_dim_from_output(node)
if not is_literal(depth) else depth
] + sympy_shape[axis:])
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[2]].type.tensor_type.elem_type, new_shape))
def _infer_Pad(self, node):
if get_opset(self.out_mp_) <= 10:
pads = get_attribute(node, 'pads')
else:
pads = self._try_get_value(node, 1)
sympy_shape = self._get_sympy_shape(node, 0)
rank = len(sympy_shape)
if pads is not None:
assert len(pads) == 2 * rank
new_sympy_shape = [
d + pad_up + pad_down for d, pad_up, pad_down in
zip(sympy_shape, pads[:rank], pads[rank:])
]
self._update_computed_dims(new_sympy_shape)
else:
# dynamic pads, create new symbolic dimensions
new_sympy_shape = self._new_symbolic_shape(rank, node)
output_tp = self.known_vi_[node.input[0]].type.tensor_type.elem_type
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[
0], output_tp, get_shape_from_sympy_shape(new_sympy_shape)))
def _infer_Pool(self, node):
sympy_shape = self._compute_conv_pool_shape(node)
self._update_computed_dims(sympy_shape)
for o in node.output:
if not o:
continue
vi = self.known_vi_[o]
vi.CopyFrom(
helper.make_tensor_value_info(o, vi.type.tensor_type.elem_type,
get_shape_from_sympy_shape(
sympy_shape)))
def _infer_aten_bitwise_or(self, node):
shape0 = self._get_shape(node, 0)
shape1 = self._get_shape(node, 1)
new_shape = self._broadcast_shapes(shape0, shape1)
t0 = self.known_vi_[node.input[0]]
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[
0], t0.type.tensor_type.elem_type, new_shape))
def _infer_aten_diagonal(self, node):
sympy_shape = self._get_sympy_shape(node, 0)
rank = len(sympy_shape)
offset = self._try_get_value(node, 1)
dim1 = self._try_get_value(node, 2)
dim2 = self._try_get_value(node, 3)
assert offset is not None and dim1 is not None and dim2 is not None
dim1 = handle_negative_axis(dim1, rank)
dim2 = handle_negative_axis(dim2, rank)
new_shape = []
for dim, val in enumerate(sympy_shape):
if dim not in [dim1, dim2]:
new_shape.append(val)
shape1 = sympy_shape[dim1]
shape2 = sympy_shape[dim2]
if offset >= 0:
diag_shape = sympy.Max(0, sympy.Min(shape1, shape2 - offset))
else:
diag_shape = sympy.Max(0, sympy.Min(shape1 + offset, shape2))
new_shape.append(diag_shape)
if node.output[0]:
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type,
get_shape_from_sympy_shape(
new_shape)))
def _infer_aten_multinomial(self, node):
sympy_shape = self._get_sympy_shape(node, 0)
rank = len(sympy_shape)
assert rank in [1, 2]
num_samples = self._try_get_value(node, 1)
di = rank - 1
last_dim = num_samples if num_samples else str(
self._new_symbolic_dim_from_output(node, 0, di))
output_shape = sympy_shape[:-1] + [last_dim]
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], onnx.TensorProto.INT64,
get_shape_from_sympy_shape(output_shape)))
def _infer_aten_pool2d(self, node):
sympy_shape = self._get_sympy_shape(node, 0)
assert len(sympy_shape) == 4
sympy_shape[-2:] = [
self._new_symbolic_dim_from_output(node, 0, i) for i in [2, 3]
]
self._update_computed_dims(sympy_shape)
for i, o in enumerate(node.output):
if not o:
continue
vi = self.known_vi_[o]
elem_type = onnx.TensorProto.INT64 if i == 1 else self.known_vi_[
node.input[0]].type.tensor_type.elem_type
vi.CopyFrom(
helper.make_tensor_value_info(
o, elem_type, get_shape_from_sympy_shape(sympy_shape)))
def _infer_aten_unfold(self, node):
sympy_shape = self._get_sympy_shape(node, 0)
dimension = self._try_get_value(node, 1)
size = self._try_get_value(node, 2)
step = self._try_get_value(node, 3)
if dimension is not None and size is not None and step is not None:
assert dimension < len(sympy_shape)
sympy_shape[dimension] = (sympy_shape[dimension] - size) // step + 1
sympy_shape.append(size)
else:
rank = len(sympy_shape)
sympy_shape = self._new_symbolic_shape(rank + 1, node)
self._update_computed_dims(sympy_shape)
if node.output[0]:
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type,
get_shape_from_sympy_shape(
sympy_shape)))
def _infer_aten_argmax(self, node):
new_shape = None
if node.input[1] == '':
# The argmax of the flattened input is returned.
new_shape = []
else:
dim = self._try_get_value(node, 1)
keepdim = self._try_get_value(node, 2)
if keepdim is not None:
sympy_shape = self._get_sympy_shape(node, 0)
if dim is not None:
dim = handle_negative_axis(dim, len(sympy_shape))
if keepdim:
sympy_shape[dim] = 1
else:
del sympy_shape[dim]
else:
rank = len(sympy_shape)
sympy_shape = self._new_symbolic_shape(rank if keepdim else
rank - 1, node)
self._update_computed_dims(sympy_shape)
new_shape = get_shape_from_sympy_shape(sympy_shape)
if node.output[0] and new_shape is not None:
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[
0], onnx.TensorProto.INT64, new_shape))
def _infer_aten_bce(self, node):
reduction = self._try_get_value(node, 4)
if reduction is None:
reduction = 1
elem_type = self.known_vi_[node.input[0]].type.tensor_type.elem_type
vi = self.known_vi_[node.output[0]]
if reduction == 0:
vi.type.tensor_type.elem_type = elem_type
vi.type.tensor_type.shape.CopyFrom(onnx.TensorShapeProto())
else:
vi.CopyFrom(
helper.make_tensor_value_info(vi.name, elem_type,
self._get_shape(node, 0)))
def _infer_BatchNormalization(self, node):
self._propagate_shape_and_type(node)
# this works for opsets < 14 and 14 since we check i < len(node.output) in the loop
for i in [1, 2, 3, 4]:
if i < len(node.output) and node.output[i] != "":
# all of these parameters have the same shape as the 1st input
self._propagate_shape_and_type(
node, input_index=1, output_index=i)
def _infer_Range(self, node):
vi = self.known_vi_[node.output[0]]
input_data = self._get_int_values(node)
if all([i is not None for i in input_data]):
start = as_scalar(input_data[0])
limit = as_scalar(input_data[1])
delta = as_scalar(input_data[2])
new_sympy_shape = [
sympy.Max(sympy.ceiling((limit - start) / delta), 0)
]
else:
new_sympy_shape = [self._new_symbolic_dim_from_output(node)]
self._update_computed_dims(new_sympy_shape)
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], self.known_vi_[node.input[0]].type.tensor_type.
elem_type, get_shape_from_sympy_shape(new_sympy_shape)))
def _infer_ReduceSum(self, node):
keep_dims = get_attribute(node, 'keepdims', 1)
if get_opset(self.out_mp_) >= 13 and len(node.input) > 1:
# ReduceSum changes axes to input[1] in opset 13
axes = self._try_get_value(node, 1)
vi = self.known_vi_[node.output[0]]
if axes is None:
assert keep_dims # can only handle keep_dims==True when axes is unknown, by generating new ranks
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], self.known_vi_[node.input[
0]].type.tensor_type.elem_type,
get_shape_from_sympy_shape(
self._new_symbolic_shape(
self._get_shape_rank(node, 0), node))))
else:
shape = self._get_shape(node, 0)
output_shape = []
axes = [handle_negative_axis(a, len(shape)) for a in axes]
for i, d in enumerate(shape):
if i in axes:
if keep_dims:
output_shape.append(1)
else:
output_shape.append(d)
vi.CopyFrom(
helper.make_tensor_value_info(node.output[
0], self.known_vi_[node.input[
0]].type.tensor_type.elem_type, output_shape))
def _infer_ReduceProd(self, node):
axes = get_attribute(node, 'axes')
keep_dims = get_attribute(node, 'keepdims', 1)
if keep_dims == 0 and axes == [0]:
data = self._get_int_values(node)[0]
if data is not None:
self.sympy_data_[node.output[0]] = sympy_reduce_product(data)
def _infer_Reshape(self, node):
shape_value = self._try_get_value(node, 1)
vi = self.known_vi_[node.output[0]]
if shape_value is None:
shape_shape = self._get_shape(node, 1)
assert len(shape_shape) == 1
shape_rank = shape_shape[0]
assert is_literal(shape_rank)
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], vi.type.tensor_type.elem_type,
get_shape_from_sympy_shape(
self._new_symbolic_shape(shape_rank, node))))
else:
input_sympy_shape = self._get_sympy_shape(node, 0)
total = int(1)
for d in input_sympy_shape:
total = total * d
new_sympy_shape = []
deferred_dim_idx = -1
non_deferred_size = int(1)
for i, d in enumerate(shape_value):
if type(d) == sympy.Symbol:
new_sympy_shape.append(d)
elif d == 0:
new_sympy_shape.append(input_sympy_shape[i])
non_deferred_size = non_deferred_size * input_sympy_shape[i]
else:
new_sympy_shape.append(d)
if d == -1:
deferred_dim_idx = i
elif d != 0:
non_deferred_size = non_deferred_size * d
assert new_sympy_shape.count(-1) < 2
if -1 in new_sympy_shape:
new_dim = total // non_deferred_size
new_sympy_shape[deferred_dim_idx] = new_dim
self._update_computed_dims(new_sympy_shape)
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], vi.type.tensor_type.elem_type,
get_shape_from_sympy_shape(new_sympy_shape)))
self._pass_on_sympy_data(node)
def _infer_Resize(self, node):
vi = self.known_vi_[node.output[0]]
input_sympy_shape = self._get_sympy_shape(node, 0)
if get_opset(self.out_mp_) <= 10:
scales = self._try_get_value(node, 1)
if scales is not None:
new_sympy_shape = [
sympy.simplify(sympy.floor(d * s))
for d, s in zip(input_sympy_shape, scales)
]
self._update_computed_dims(new_sympy_shape)
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], self.known_vi_[node.input[
0]].type.tensor_type.elem_type,
get_shape_from_sympy_shape(new_sympy_shape)))
else:
roi = self._try_get_value(node, 1)
scales = self._try_get_value(node, 2)
sizes = self._try_get_value(node, 3)
if sizes is not None:
new_sympy_shape = [
sympy.simplify(sympy.floor(s)) for s in sizes
]
self._update_computed_dims(new_sympy_shape)
elif scales is not None:
rank = len(scales)
if get_attribute(node, 'coordinate_transformation_mode'
) == 'tf_crop_and_resize':
assert len(roi) == 2 * rank
roi_start = list(roi)[:rank]
roi_end = list(roi)[rank:]
else:
roi_start = [0] * rank
roi_end = [1] * rank
scales = list(scales)
new_sympy_shape = [
sympy.simplify(sympy.floor(d * (end - start) * scale))
for d, start, end, scale in
zip(input_sympy_shape, roi_start, roi_end, scales)
]
self._update_computed_dims(new_sympy_shape)
else:
new_sympy_shape = self._new_symbolic_shape(
self._get_shape_rank(node, 0), node)
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type,
get_shape_from_sympy_shape(
new_sympy_shape)))
def _infer_Scan(self, node):
subgraph = get_attribute(node, 'body')
num_scan_inputs = get_attribute(node, 'num_scan_inputs')
scan_input_axes = get_attribute(node, 'scan_input_axes',
[0] * num_scan_inputs)
num_scan_states = len(node.input) - num_scan_inputs
scan_input_axes = [
handle_negative_axis(
ax, self._get_shape_rank(node, i + num_scan_states))
for i, ax in enumerate(scan_input_axes)
]
# We may have cases where the subgraph has optionial inputs that appear in both subgraph's input and initializer,
# but not in the node's input. In such cases, the input model might be invalid, but let's skip those optional inputs.
assert len(subgraph.input) >= len(node.input)
subgraph_inputs = subgraph.input[:len(node.input)]
for i, si in enumerate(subgraph_inputs):
subgraph_name = si.name
si.CopyFrom(self.known_vi_[node.input[i]])
if i >= num_scan_states:
scan_input_dim = si.type.tensor_type.shape.dim
scan_input_dim.remove(
scan_input_dim[scan_input_axes[i - num_scan_states]])
si.name = subgraph_name
self._onnx_infer_subgraph(node, subgraph)
num_scan_outputs = len(node.output) - num_scan_states
scan_output_axes = get_attribute(node, 'scan_output_axes',
[0] * num_scan_outputs)
scan_input_dim = get_shape_from_type_proto(
self.known_vi_[node.input[-1]].type)[scan_input_axes[-1]]
for i, o in enumerate(node.output):
vi = self.known_vi_[o]
if i >= num_scan_states:
shape = get_shape_from_type_proto(subgraph.output[i].type)
new_dim = handle_negative_axis(
scan_output_axes[i - num_scan_states], len(shape) + 1)
shape = shape[:new_dim] + [scan_input_dim] + shape[new_dim:]
vi.CopyFrom(
helper.make_tensor_value_info(o, subgraph.output[
i].type.tensor_type.elem_type, shape))
else:
vi.CopyFrom(subgraph.output[i])
vi.name = o
def _infer_ScatterElements(self, node):
data_shape = self._get_shape(node, 0)
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type, data_shape))
def _infer_SequenceAt(self, node):
# need to create new symbolic dimension if sequence shape has None:
seq_shape = self._get_shape(node, 0)
vi = self.known_vi_[node.output[0]]
if seq_shape is not None:
for di, d in enumerate(seq_shape):
if d is not None:
continue
new_dim = onnx.TensorShapeProto.Dimension()
new_dim.dim_param = str(
self._new_symbolic_dim_from_output(node, 0, di))
vi.type.tensor_type.shape.dim[di].CopyFrom(new_dim)
def _infer_SequenceInsert(self, node):
# workaround bug in onnx's shape inference
vi_seq = self.known_vi_[node.input[0]]
vi_tensor = self.known_vi_[node.input[1]]
vi_out_seq = self.known_vi_[node.output[0]]
vi_out_seq.CopyFrom(vi_seq)
vi_out_seq.name = node.output[0]
self._fuse_tensor_type(node, 0, vi_out_seq.type, vi_tensor.type)
def _infer_Shape(self, node):
self.sympy_data_[node.output[0]] = self._get_sympy_shape(node, 0)
def _infer_Size(self, node):
sympy_shape = self._get_sympy_shape(node, 0)
self.sympy_data_[node.output[0]] = sympy_reduce_product(sympy_shape)
self.known_vi_[node.output[0]].CopyFrom(
helper.make_tensor_value_info(node.output[0],
onnx.TensorProto.INT64, []))
def _infer_Slice(self, node):
def less_equal(x, y):
try:
return bool(x <= y)
except TypeError:
pass
try:
return bool(y >= x)
except TypeError:
pass
try:
return bool(-x >= -y)
except TypeError:
pass
try:
return bool(-y <= -x)
except TypeError:
# the last attempt; this may raise TypeError
return bool(y - x >= 0)
def handle_negative_index(index, bound):
""" normalizes a negative index to be in [0, bound) """
try:
if not less_equal(0, index):
if is_literal(index) and index <= -self.int_max_:
# this case is handled separately
return index
return bound + index
except TypeError:
logger.warning("Cannot determine if {} < 0".format(index))
return index
if get_opset(self.out_mp_) <= 9:
axes = get_attribute(node, 'axes')
starts = get_attribute(node, 'starts')
ends = get_attribute(node, 'ends')
if not axes:
axes = list(range(len(starts)))
steps = [1] * len(axes)
else:
starts = as_list(self._try_get_value(node, 1), keep_none=True)
ends = as_list(self._try_get_value(node, 2), keep_none=True)
axes = self._try_get_value(node, 3)
steps = self._try_get_value(node, 4)
if axes is None and not (starts is None and ends is None):
axes = list(
range(0, len(starts if starts is not None else ends)))
if steps is None and not (starts is None and ends is None):
steps = [1] * len(starts if starts is not None else ends)
axes = as_list(axes, keep_none=True)
steps = as_list(steps, keep_none=True)
new_sympy_shape = self._get_sympy_shape(node, 0)
if starts is None or ends is None:
if axes is None:
for i in range(len(new_sympy_shape)):
new_sympy_shape[i] = self._new_symbolic_dim_from_output(
node, 0, i)
else:
new_sympy_shape = get_shape_from_sympy_shape(new_sympy_shape)
for i in axes:
new_sympy_shape[i] = self._new_symbolic_dim_from_output(
node, 0, i)
else:
for i, s, e, t in zip(axes, starts, ends, steps):
e = handle_negative_index(e, new_sympy_shape[i])
if is_literal(e):
if e >= self.int_max_:
e = new_sympy_shape[i]
elif e <= -self.int_max_:
e = 0 if s > 0 else -1
elif is_literal(new_sympy_shape[i]):
if e < 0:
e = max(0, e + new_sympy_shape[i])
e = min(e, new_sympy_shape[i])
else:
if e > 0:
e = sympy.Min(
e, new_sympy_shape[i]
) if e > 1 else e #special case for slicing first to make computation easier
else:
if is_literal(new_sympy_shape[i]):
e = sympy.Min(e, new_sympy_shape[i])
else:
try:
if not less_equal(e, new_sympy_shape[i]):
e = new_sympy_shape[i]
except Exception:
logger.warning(
'Unable to determine if {} <= {}, treat as equal'.
format(e, new_sympy_shape[i]))
e = new_sympy_shape[i]
s = handle_negative_index(s, new_sympy_shape[i])
if is_literal(new_sympy_shape[i]) and is_literal(s):
s = max(0, min(s, new_sympy_shape[i]))
new_sympy_shape[i] = sympy.simplify(
(e - s + t + (-1 if t > 0 else 1)) // t)
self._update_computed_dims(new_sympy_shape)
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], vi.type.tensor_type.elem_type,
get_shape_from_sympy_shape(new_sympy_shape)))
# handle sympy_data if needed, for slice in shape computation
if (node.input[0] in self.sympy_data_ and [0] == axes and
len(starts) == 1 and len(ends) == 1 and len(steps) == 1):
input_sympy_data = self.sympy_data_[node.input[0]]
if type(input_sympy_data) == list or (
type(input_sympy_data) == np.array and
len(input_sympy_data.shape) == 1):
self.sympy_data_[node.output[0]] = input_sympy_data[starts[
0]:ends[0]:steps[0]]
def _infer_SoftmaxCrossEntropyLoss(self, node):
vi = self.known_vi_[node.output[0]]
elem_type = self.known_vi_[node.input[0]].type.tensor_type.elem_type
vi.type.tensor_type.elem_type = elem_type
vi.type.tensor_type.shape.CopyFrom(onnx.TensorShapeProto())
if len(node.output) > 1:
data_shape = self._get_shape(node, 0)
vi = self.known_vi_[node.output[1]]
vi.CopyFrom(
helper.make_tensor_value_info(vi.name, elem_type, data_shape))
def _infer_Split_Common(self, node, make_value_info_func):
input_sympy_shape = self._get_sympy_shape(node, 0)
axis = handle_negative_axis(
get_attribute(node, 'axis', 0), len(input_sympy_shape))
split = get_attribute(node, 'split')
if not split:
num_outputs = len(node.output)
split = [input_sympy_shape[axis] /
sympy.Integer(num_outputs)] * num_outputs
self._update_computed_dims(split)
else:
split = [sympy.Integer(s) for s in split]
for i_o in range(len(split)):
vi = self.known_vi_[node.output[i_o]]
vi.CopyFrom(
make_value_info_func(node.output[i_o], self.known_vi_[
node.input[0]].type.tensor_type.elem_type,
get_shape_from_sympy_shape(
input_sympy_shape[:axis] + [
split[i_o]
] + input_sympy_shape[axis + 1:])))
self.known_vi_[vi.name] = vi
def _infer_Split(self, node):
self._infer_Split_Common(node, helper.make_tensor_value_info)
def _infer_SplitToSequence(self, node):
self._infer_Split_Common(node, helper.make_sequence_value_info)
def _infer_Squeeze(self, node):
input_shape = self._get_shape(node, 0)
op_set = get_opset(self.out_mp_)
# Depending on op-version 'axes' are provided as attribute or via 2nd input
if op_set < 13:
axes = get_attribute(node, 'axes')
assert self._try_get_value(node, 1) is None
else:
axes = self._try_get_value(node, 1)
assert get_attribute(node, 'axes') is None
if axes is None:
# No axes have been provided (neither via attribute nor via input).
# In this case the 'Shape' op should remove all axis with dimension 1.
# For symbolic dimensions we guess they are !=1.
output_shape = [s for s in input_shape if s != 1]
if self.verbose_ > 0:
symbolic_dimensions = [s for s in input_shape if type(s) != int]
if len(symbolic_dimensions) > 0:
logger.debug(
f"Symbolic dimensions in input shape of op: '{node.op_type}' node: '{node.name}'. "
+
f"Assuming the following dimensions are never equal to 1: {symbolic_dimensions}"
)
else:
axes = [handle_negative_axis(a, len(input_shape)) for a in axes]
output_shape = []
for i in range(len(input_shape)):
if i not in axes:
output_shape.append(input_shape[i])
else:
assert input_shape[i] == 1 or type(input_shape[i]) != int
if self.verbose_ > 0 and type(input_shape[i]) != int:
logger.debug(
f"Symbolic dimensions in input shape of op: '{node.op_type}' node: '{node.name}'. "
+
f"Assuming the dimension '{input_shape[i]}' at index {i} of the input to be equal to 1."
)
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type, output_shape))
self._pass_on_sympy_data(node)
def _infer_Tile(self, node):
repeats_value = self._try_get_value(node, 1)
new_sympy_shape = []
if repeats_value is not None:
input_sympy_shape = self._get_sympy_shape(node, 0)
for i, d in enumerate(input_sympy_shape):
new_dim = d * repeats_value[i]
new_sympy_shape.append(new_dim)
self._update_computed_dims(new_sympy_shape)
else:
new_sympy_shape = self._new_symbolic_shape(
self._get_shape_rank(node, 0), node)
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(
node.output[0], vi.type.tensor_type.elem_type,
get_shape_from_sympy_shape(new_sympy_shape)))
def _infer_TopK(self, node):
rank = self._get_shape_rank(node, 0)
axis = handle_negative_axis(get_attribute(node, 'axis', -1), rank)
new_shape = self._get_shape(node, 0)
if get_opset(self.out_mp_) <= 9:
k = get_attribute(node, 'k')
else:
k = self._get_int_values(node)[1]
if k == None:
k = self._new_symbolic_dim_from_output(node)
else:
k = as_scalar(k)
if type(k) in [int, str]:
new_shape[axis] = k
else:
new_sympy_shape = self._get_sympy_shape(node, 0)
new_sympy_shape[axis] = k
self._update_computed_dims(
new_sympy_shape
) # note that TopK dim could be computed in sympy_data, so need to update computed_dims when it enters shape
new_shape = get_shape_from_sympy_shape(new_sympy_shape)
for i_o in range(len(node.output)):
vi = self.known_vi_[node.output[i_o]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[
i_o], vi.type.tensor_type.elem_type, new_shape))
def _infer_Transpose(self, node):
if node.input[0] in self.sympy_data_:
data_shape = self._get_shape(node, 0)
perm = get_attribute(node, 'perm',
reversed(list(range(len(data_shape)))))
input_data = self.sympy_data_[node.input[0]]
self.sympy_data_[node.output[0]] = np.transpose(
np.array(input_data).reshape(*data_shape),
axes=tuple(perm)).flatten().tolist()
def _infer_Unsqueeze(self, node):
input_shape = self._get_shape(node, 0)
op_set = get_opset(self.out_mp_)
# Depending on op-version 'axes' are provided as attribute or via 2nd input
if op_set < 13:
axes = get_attribute(node, 'axes')
assert self._try_get_value(node, 1) is None
else:
axes = self._try_get_value(node, 1)
assert get_attribute(node, 'axes') is None
output_rank = len(input_shape) + len(axes)
axes = [handle_negative_axis(a, output_rank) for a in axes]
input_axis = 0
output_shape = []
for i in range(output_rank):
if i in axes:
output_shape.append(1)
else:
output_shape.append(input_shape[input_axis])
input_axis += 1
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], self.known_vi_[
node.input[0]].type.tensor_type.elem_type, output_shape))
self._pass_on_sympy_data(node)
def _infer_ZipMap(self, node):
map_key_type = None
if get_attribute(node, 'classlabels_int64s') is not None:
map_key_type = onnx.TensorProto.INT64
elif get_attribute(node, 'classlabels_strings') is not None:
map_key_type = onnx.TensorProto.STRING
assert map_key_type is not None
new_vi = onnx.ValueInfoProto()
new_vi.name = node.output[0]
new_vi.type.sequence_type.elem_type.map_type.value_type.tensor_type.elem_type = onnx.TensorProto.FLOAT
new_vi.type.sequence_type.elem_type.map_type.key_type = map_key_type
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(new_vi)
def _infer_Attention(self, node):
shape = self._get_shape(node, 0)
shape_bias = self._get_shape(node, 2)
assert len(shape) == 3 and len(shape_bias) == 1
qkv_hidden_sizes_attr = get_attribute(node, 'qkv_hidden_sizes')
if qkv_hidden_sizes_attr is not None:
assert len(qkv_hidden_sizes_attr) == 3
shape[2] = int(qkv_hidden_sizes_attr[2])
else:
shape[2] = int(shape_bias[0] / 3)
output_dtype = self.known_vi_[node.input[0]].type.tensor_type.elem_type
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], output_dtype, shape))
if len(node.output) > 1:
# input shape: (batch_size, sequence_length, hidden_size)
# past shape: (2, batch_size, num_heads, past_sequence_length, head_size)
# mask shape: (batch_size, total_sequence_length) or (batch_size, sequence_length, total_sequence_length) or (batch_size, 1, max_seq_len, max_seq_len)
# present shape: (2, batch_size, num_heads, total_sequence_length, head_size), where total_sequence_length=sequence_length+past_sequence_length
input_shape = self._get_shape(node, 0)
past_shape = self._get_shape(node, 4)
mask_shape = self._get_shape(node, 3)
if len(past_shape) == 5:
if len(mask_shape) in [2, 3]:
past_shape[3] = mask_shape[-1]
elif isinstance(input_shape[1], int) and isinstance(
past_shape[3], int):
past_shape[3] = input_shape[1] + past_shape[3]
else:
past_shape[3] = f"{past_shape[3]}+{input_shape[1]}"
vi = self.known_vi_[node.output[1]]
vi.CopyFrom(
helper.make_tensor_value_info(vi.name, output_dtype,
past_shape))
def _infer_BiasGelu(self, node):
self._propagate_shape_and_type(node)
def _infer_FastGelu(self, node):
self._propagate_shape_and_type(node)
def _infer_Gelu(self, node):
self._propagate_shape_and_type(node)
def _infer_LayerNormalization(self, node):
self._propagate_shape_and_type(node)
def _infer_LongformerAttention(self, node):
self._propagate_shape_and_type(node)
def _infer_EmbedLayerNormalization(self, node):
input_ids_shape = self._get_shape(node, 0)
word_embedding_shape = self._get_shape(node, 2)
assert len(input_ids_shape) == 2 and len(word_embedding_shape) == 2
output_shape = input_ids_shape + [word_embedding_shape[1]]
word_embedding_dtype = self.known_vi_[node.input[
2]].type.tensor_type.elem_type
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0], word_embedding_dtype,
output_shape))
mask_index_shape = [input_ids_shape[0]]
vi = self.known_vi_[node.output[1]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[
1], onnx.TensorProto.INT32, mask_index_shape))
if len(node.output) > 2:
# Optional output of add before layer nomalization is done
# shape is same as the output
vi = self.known_vi_[node.output[2]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[
2], word_embedding_dtype, output_shape))
def _infer_SkipLayerNormalization(self, node):
self._propagate_shape_and_type(node)
def _infer_PythonOp(self, node):
output_tensor_types = get_attribute(node, 'output_tensor_types')
assert output_tensor_types
output_tensor_ranks = get_attribute(node, 'output_tensor_ranks')
assert output_tensor_ranks
# set the context output seperately.
# The first output is autograd's context.
vi = self.known_vi_[node.output[0]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[0],
onnx.TensorProto.INT64, []))
# Outputs after autograd's context are tensors.
# We assume their ranks are fixed for different model inputs.
for i in range(len(node.output) - 1):
# Process the i-th tensor outputs.
vi = self.known_vi_[node.output[i + 1]]
sympy_shape = self._new_symbolic_shape(output_tensor_ranks[i], node)
shape = get_shape_from_sympy_shape(sympy_shape)
value_info = helper.make_tensor_value_info(
node.output[i + 1], output_tensor_types[i], shape)
vi.CopyFrom(value_info)
def _propagate_shape_and_type(self, node, input_index=0, output_index=0):
shape = self._get_shape(node, input_index)
output_dtype = self.known_vi_[node.input[
input_index]].type.tensor_type.elem_type
vi = self.known_vi_[node.output[output_index]]
vi.CopyFrom(
helper.make_tensor_value_info(node.output[output_index],
output_dtype, shape))
def _is_none_dim(self, dim_value):
if type(dim_value) != str:
return False
if "unk__" not in dim_value:
return False
if dim_value in self.symbolic_dims_.keys():
return False
return True
def _is_shape_contains_none_dim(self, out_shape):
for out in out_shape:
if self._is_none_dim(out):
return out
return None
def _infer_impl(self, start_sympy_data=None):
self.sympy_data_ = start_sympy_data or {}
self.out_mp_.graph.ClearField('value_info')
self._apply_suggested_merge(graph_input_only=True)
self.input_symbols_ = set()
for i in self.out_mp_.graph.input:
input_shape = get_shape_from_value_info(i)
if input_shape is None:
continue
if is_sequence(i.type):
input_dims = i.type.sequence_type.elem_type.tensor_type.shape.dim
else:
input_dims = i.type.tensor_type.shape.dim
for i_dim, dim in enumerate(input_shape):
if dim is None:
# some models use None for symbolic dim in input, replace it with a string
input_dims[i_dim].dim_param = str(
self._new_symbolic_dim(i.name, i_dim))
self.input_symbols_.update(
[d for d in input_shape if type(d) == str])
for s in self.input_symbols_:
if s in self.suggested_merge_:
s_merge = self.suggested_merge_[s]
assert s_merge in self.symbolic_dims_
self.symbolic_dims_[s] = self.symbolic_dims_[s_merge]
else:
# Since inputs are not produced by other ops, we can assume positivity
self.symbolic_dims_[s] = sympy.Symbol(
s, integer=True, positive=True)
# create a temporary ModelProto for single node inference
# note that we remove initializer to have faster inference
# for tensor ops like Reshape/Tile/Expand that read initializer, we need to do sympy computation based inference anyways
self.tmp_mp_ = onnx.ModelProto()
self.tmp_mp_.CopyFrom(self.out_mp_)
self.tmp_mp_.graph.ClearField('initializer')
# compute prerequesite for node for topological sort
# node with subgraphs may have dependency on implicit inputs, which will affect topological sort
prereq_for_node = {
} # map from node to all its inputs, including implicit ones in subgraph
def get_prereq(node):
names = set(i for i in node.input if i)
subgraphs = []
if 'If' == node.op_type:
subgraphs = [
get_attribute(node, 'then_branch'),
get_attribute(node, 'else_branch')
]
elif node.op_type in ['Loop', 'Scan']:
subgraphs = [get_attribute(node, 'body')]
for g in subgraphs:
g_outputs_and_initializers = {i.name for i in g.initializer}
g_prereq = set()
for n in g.node:
g_outputs_and_initializers.update(n.output)
for n in g.node:
g_prereq.update([
i for i in get_prereq(n)
if i not in g_outputs_and_initializers
])
names.update(g_prereq)
# remove subgraph inputs from g_prereq since those are local-only
for i in g.input:
if i.name in names:
names.remove(i.name)
return names
for n in self.tmp_mp_.graph.node:
prereq_for_node[n.output[0]] = get_prereq(n)
# topological sort nodes, note there might be dead nodes so we check if all graph outputs are reached to terminate
sorted_nodes = []
sorted_known_vi = set([
i.name for i in list(self.out_mp_.graph.input) +
list(self.out_mp_.graph.initializer)
])
if any([o.name in sorted_known_vi for o in self.out_mp_.graph.output]):
# Loop/Scan will have some graph output in graph inputs, so don't do topological sort
sorted_nodes = self.out_mp_.graph.node
else:
while not all(
[o.name in sorted_known_vi for o in self.out_mp_.graph.output]):
old_sorted_nodes_len = len(sorted_nodes)
for node in self.out_mp_.graph.node:
if (node.output[0] not in sorted_known_vi) and all([
i in sorted_known_vi
for i in prereq_for_node[node.output[0]] if i
]):
sorted_known_vi.update(node.output)
sorted_nodes.append(node)
if old_sorted_nodes_len == len(sorted_nodes) and not all([
o.name in sorted_known_vi
for o in self.out_mp_.graph.output
]):
raise Exception('Invalid model with cyclic graph')
for node in sorted_nodes:
assert all([i in self.known_vi_ for i in node.input if i])
self._onnx_infer_single_node(node)
known_aten_op = False
if node.op_type in self.dispatcher_:
self.dispatcher_[node.op_type](node)
elif node.op_type in ['ConvTranspose']:
# onnx shape inference ops like ConvTranspose may have empty shape for symbolic input
# before adding symbolic compute for them
# mark the output type as UNDEFINED to allow guessing of rank
vi = self.known_vi_[node.output[0]]
if len(vi.type.tensor_type.shape.dim) == 0:
vi.type.tensor_type.elem_type = onnx.TensorProto.UNDEFINED
elif node.op_type == 'ATen' and node.domain == 'org.pytorch.aten':
for attr in node.attribute:
# TODO: Is overload_name needed?
if attr.name == 'operator':
aten_op_name = attr.s.decode('utf-8') if isinstance(
attr.s, bytes) else attr.s
if aten_op_name in self.aten_op_dispatcher_:
known_aten_op = True
self.aten_op_dispatcher_[aten_op_name](node)
break
if self.verbose_ > 2:
logger.debug(node.op_type + ': ' + node.name)
for i, name in enumerate(node.input):
logger.debug(' Input {}: {} {}'.format(
i, name, 'initializer'
if name in self.initializers_ else ''))
# onnx automatically merge dims with value, i.e. Mul(['aaa', 'bbb'], [1000, 1]) -> [1000, 'bbb']
# symbolic shape inference needs to apply merge of 'aaa' -> 1000 in this case
if node.op_type in [
'Add', 'Sub', 'Mul', 'Div', 'MatMul', 'MatMulInteger',
'MatMulInteger16', 'Where', 'Sum'
]:
vi = self.known_vi_[node.output[0]]
out_rank = len(get_shape_from_type_proto(vi.type))
in_shapes = [
self._get_shape(node, i) for i in range(len(node.input))
]
for d in range(out_rank - (2 if node.op_type in [
'MatMul', 'MatMulInteger', 'MatMulInteger16'
] else 0)):
in_dims = [
s[len(s) - out_rank + d] for s in in_shapes
if len(s) + d >= out_rank
]
if len(in_dims) > 1:
self._check_merged_dims(in_dims, allow_broadcast=True)
for i_o in range(len(node.output)):
vi = self.known_vi_[node.output[i_o]]
out_type = vi.type
out_type_kind = out_type.WhichOneof('value')
# do not process shape for non-tensors
if out_type_kind not in [
'tensor_type', 'sparse_tensor_type', None
]:
if self.verbose_ > 2:
if out_type_kind == 'sequence_type':
seq_cls_type = out_type.sequence_type.elem_type.WhichOneof(
'value')
if 'tensor_type' == seq_cls_type:
logger.debug(' {}: sequence of {} {}'.format(
node.output[i_o],
str(get_shape_from_value_info(vi)),
onnx.TensorProto.DataType.Name(
vi.type.sequence_type.elem_type.
tensor_type.elem_type)))
else:
logger.debug(' {}: sequence of {}'.format(
node.output[i_o], seq_cls_type))
else:
logger.debug(' {}: {}'.format(node.output[i_o],
out_type_kind))
continue
out_shape = get_shape_from_value_info(vi)
out_type_undefined = out_type.tensor_type.elem_type == onnx.TensorProto.UNDEFINED
if self.verbose_ > 2:
logger.debug(' {}: {} {}'.format(
node.output[i_o],
str(out_shape),
onnx.TensorProto.DataType.Name(
vi.type.tensor_type.elem_type)))
if node.output[i_o] in self.sympy_data_:
logger.debug(' Sympy Data: ' + str(self.sympy_data_[
node.output[i_o]]))
# onnx >= 1.11.0, use unk__#index instead of None when the shape dim is uncertain
if (out_shape is not None and
(None in out_shape or
self._is_shape_contains_none_dim(out_shape))
) or out_type_undefined:
if self.auto_merge_:
if node.op_type in [
'Add', 'Sub', 'Mul', 'Div', 'MatMul',
'MatMulInteger', 'MatMulInteger16', 'Concat',
'Where', 'Sum', 'Equal', 'Less', 'Greater',
'LessOrEqual', 'GreaterOrEqual'
]:
shapes = [
self._get_shape(node, i)
for i in range(len(node.input))
]
if node.op_type in [
'MatMul', 'MatMulInteger', 'MatMulInteger16'
]:
if None in out_shape or self._is_shape_contains_none_dim(
out_shape):
if None in out_shape:
idx = out_shape.index(None)
else:
idx = out_shape.index(
self._is_shape_contains_none_dim(
out_shape))
dim_idx = [
len(s) - len(out_shape) + idx
for s in shapes
]
# only support auto merge for MatMul for dim < rank-2 when rank > 2
assert len(
shapes[0]) > 2 and dim_idx[0] < len(
shapes[0]) - 2
assert len(
shapes[1]) > 2 and dim_idx[1] < len(
shapes[1]) - 2
elif node.op_type == 'Expand':
# auto merge for cases like Expand([min(batch, 1), min(seq, 512)], [batch, seq])
shapes = [
self._get_shape(node, 0), self._get_value(node,
1)
]
else:
shapes = []
if shapes:
for idx in range(len(out_shape)):
if out_shape[
idx] is not None and not self._is_none_dim(
out_shape[idx]):
continue
# note that the broadcasting rule aligns from right to left
# if a tensor has a lower rank (dim_idx[idx] < 0), it would automatically broadcast and need no merge
dim_idx = [
len(s) - len(out_shape) + idx
for s in shapes
]
if len(dim_idx) > 0:
self._add_suggested_merge([
s[i] if is_literal(s[i]) else str(s[i])
for s, i in zip(shapes, dim_idx)
if i >= 0
])
self.run_ = True
else:
self.run_ = False
else:
self.run_ = False
# create new dynamic dims for ops not handled by symbolic shape inference
if self.run_ == False and not node.op_type in self.dispatcher_ and not known_aten_op:
is_unknown_op = out_type_undefined and (
out_shape is None or len(out_shape) == 0)
if is_unknown_op:
# unknown op to ONNX, maybe from higher opset or other domain
# only guess the output rank from input 0 when using guess_output_rank option
out_rank = self._get_shape_rank(
node, 0) if self.guess_output_rank_ else -1
else:
# valid ONNX op, but not handled by symbolic shape inference, just assign dynamic shape
out_rank = len(out_shape)
if out_rank >= 0:
new_shape = self._new_symbolic_shape(out_rank, node,
i_o)
if out_type_undefined:
# guess output data type from input vi if not defined
out_dtype = self.known_vi_[node.input[
0]].type.tensor_type.elem_type
else:
# otherwise, use original data type
out_dtype = vi.type.tensor_type.elem_type
vi.CopyFrom(
helper.make_tensor_value_info(
vi.name, out_dtype,
get_shape_from_sympy_shape(new_shape)))
if self.verbose_ > 0:
if is_unknown_op:
logger.debug(
"Possible unknown op: {} node: {}, guessing {} shape".
format(node.op_type, node.name,
vi.name))
if self.verbose_ > 2:
logger.debug(' {}: {} {}'.format(
node.output[i_o],
str(new_shape),
vi.type.tensor_type.elem_type))
self.run_ = True
continue # continue the inference after guess, no need to stop as no merge is needed
if self.verbose_ > 0 or not self.auto_merge_ or out_type_undefined:
logger.debug(
'Stopping at incomplete shape inference at ' +
node.op_type + ': ' + node.name)
logger.debug('node inputs:')
for i in node.input:
logger.debug(self.known_vi_[i])
logger.debug('node outputs:')
for o in node.output:
logger.debug(self.known_vi_[o])
if self.auto_merge_ and not out_type_undefined:
logger.debug('Merging: ' + str(
self.suggested_merge_))
return False
self.run_ = False
return True
def _update_output_from_vi(self):
for output in self.out_mp_.graph.output:
if output.name in self.known_vi_:
output.CopyFrom(self.known_vi_[output.name])
@staticmethod
def infer_shapes(in_mp,
int_max=2**31 - 1,
auto_merge=False,
guess_output_rank=False,
verbose=0):
onnx_opset = get_opset(in_mp)
if (not onnx_opset) or onnx_opset < 7:
logger.warning('Only support models of onnx opset 7 and above.')
return None
symbolic_shape_inference = SymbolicShapeInference(
int_max, auto_merge, guess_output_rank, verbose)
all_shapes_inferred = False
symbolic_shape_inference._preprocess(in_mp)
while symbolic_shape_inference.run_:
all_shapes_inferred = symbolic_shape_inference._infer_impl()
symbolic_shape_inference._update_output_from_vi()
if not all_shapes_inferred:
raise Exception("Incomplete symbolic shape inference")
return symbolic_shape_inference.out_mp_
def parse_arguments():
parser = argparse.ArgumentParser()
parser.add_argument('--input', required=True, help='The input model file')
parser.add_argument('--output', help='The output model file')
parser.add_argument(
'--auto_merge',
help='Automatically merge symbolic dims when confliction happens',
action='store_true',
default=False)
parser.add_argument(
'--int_max',
help='maximum value for integer to be treated as boundless for ops like slice',
type=int,
default=2**31 - 1)
parser.add_argument(
'--guess_output_rank',
help='guess output rank to be the same as input 0 for unknown ops',
action='store_true',
default=False)
parser.add_argument(
'--verbose',
help='Prints detailed logs of inference, 0: turn off, 1: warnings, 3: detailed',
type=int,
default=0)
return parser.parse_args()
if __name__ == '__main__':
args = parse_arguments()
logger.info('input model: ' + args.input)
if args.output:
logger.info('output model ' + args.output)
logger.info('Doing symbolic shape inference...')
out_mp = SymbolicShapeInference.infer_shapes(
onnx.load(args.input), args.int_max, args.auto_merge,
args.guess_output_rank, args.verbose)
if args.output and out_mp:
onnx.save(out_mp, args.output)
logger.info('Done!')