def add_squeeze_for_shrink(graph: Graph, ss_node: Node):
# add Squeeze for shrink_axis_mask
log.info(
"StridedSlice op with shrink mask '{}' has been detected".format(
ss_node.id))
if len(ss_node.in_nodes()) != 4 or len(ss_node.out_nodes()) != 1:
return
shape_out = ss_node.out_node().shape
dim = mo_array(range(len(ss_node['shrink_axis_mask'])))[mo_array(
ss_node['shrink_axis_mask'], dtype=bool)]
ss_shape = []
i = 0
k = 0
# Don't permute reshape if channels were squeezed
dont_permute = graph.graph['layout'] == 'NCHW'
if graph.graph['layout'] == 'NHWC' and ss_node['shrink_axis_mask'][
-1] == 1:
dont_permute = True
while k < len(shape_out):
if i >= len(ss_node['shrink_axis_mask']
) or not ss_node['shrink_axis_mask'][i]:
ss_shape.append(shape_out[k])
k = k + 1
else:
ss_node['shrink_axis_mask'][i] = 0
ss_shape.append(1)
i = i + 1
while i < len(ss_node['shrink_axis_mask']):
ss_node['shrink_axis_mask'][i] = 0
ss_shape.append(1)
i = i + 1
ss_node.out_port(0).data.set_shape(ss_shape)
# insert Squeeze
squeeze_node = Squeeze(
graph,
dict(name=ss_node.name + '/Squeeze_shrink',
nchw_layout=dont_permute,
correct_data_layout=dont_permute)).create_node()
ss_node.out_port(0).get_connection().insert_node(squeeze_node)
squeeze_node.out_port(0).data.set_shape(shape_out)
dims_node = Const(graph, {
'name': squeeze_node.id + '/Indices',
'value': int64_array(dim)
}).create_node()
dims_node.out_port(0).connect(squeeze_node.in_port(1))
def replace_sub_graph(self, graph: Graph, match: dict):
node = match['node']
connected_ports = [
port for port in node.in_ports().values()
if not port.disconnected()
]
squeeze_node = Squeeze(graph, dict()).create_node([],
dict(name=node.name +
'/Squeeze'))
if len(connected_ports) == 2:
node.in_port(1).get_source().connect(squeeze_node.in_port(1))
else:
axis_node = Const(graph, {'value': node.axis}).create_node()
squeeze_node.in_port(1).connect(axis_node.out_port(0))
node.out_port(0).get_connection().set_source(squeeze_node.out_port(0))
node.out_port(0).connect(squeeze_node.in_port(0))
return []
