[Frontend][Tensorflow] SelectV2 and BroadcastArgs op support for tf2 …

…models (apache#7901)

python/tvm/relay/frontend/tensorflow.py

@@ -19,6 +19,7 @@
 """TF: Tensorflow frontend."""
 import warnings
 from collections import defaultdict
+from collections import deque
 
 # Numpy support
 import numpy as np
@@ -1770,6 +1771,43 @@ def _impl(inputs, attr, params, mod):
  return _impl
 
 
+def _broadcast_args():
+ def _impl(inputs, attr, params, mod):
+ if isinstance(inputs[0], _expr.Var):
+ s0 = params[inputs[0].name_hint]
+ else:
+ s0 = _infer_value(inputs[0], params, mod)
+ if isinstance(inputs[1], _expr.Var):
+ s1 = params[inputs[1].name_hint]
+ else:
+ s1 = _infer_value(inputs[1], params, mod)
+ s0 = list(s0.asnumpy().reshape([-1]))
+ s1 = list(s1.asnumpy().reshape([-1]))
+ s0_size, s1_size = len(s0), len(s1)
+
+ out = deque([])
+ for i in range(1, min(s0_size, s1_size) + 1):
+ if s0[s0_size - i] == s1[s1_size - i]:
+ out.appendleft(s0[s0_size - i])
+ elif s0[s0_size - i] == 1:
+ out.appendleft(s1[s1_size - i])
+ else:
+ assert s1[s1_size - i] == 1, "Incompatible broadcast type %s and %s" % (
+ s0[s0_size - i],
+ s1[s1_size - i],
+ )
+ out.appendleft(s0[s0_size - i])
+ if s0_size < s1_size:
+ for i in range(s0_size + 1, s1_size + 1):
+ out.appendleft(s1[s1_size - i])
+ if s1_size < s0_size:
+ for i in range(s1_size + 1, s0_size + 1):
+ out.appendleft(s0[s0_size - i])
+ return _expr.const(list(out), attr["T"].name)
+
+ return _impl
+
+
 def _broadcast_to():
  def _impl(inputs, attr, params, mod):
  if isinstance(inputs[1], _expr.Var):
@@ -2745,6 +2783,7 @@ def _impl(inputs, attr, params, mod):
  "BatchToSpaceND": _batch_to_space_nd(),
  "BiasAdd": _bias_add(),
  "BroadcastTo": _broadcast_to(),
+ "BroadcastArgs": _broadcast_args(),
  "Cast": _cast(),
  "Ceil": AttrCvt("ceil"),
  "CheckNumerics": _check_numerics(),
@@ -2838,6 +2877,7 @@ def _impl(inputs, attr, params, mod):
  "Round": AttrCvt("round"),
  "Rsqrt": _rsqrt(),
  "Select": _where(),
+ "SelectV2": _where(),
  "Selu": _selu(),
  "Shape": _shape(),
  "Sigmoid": AttrCvt("sigmoid"),
@@ -3941,7 +3981,6 @@ def _backtrack_construct(self, node_name):
  raise ImportError("Unable to import tensorflow which is required {}".format(e))
 
  input_op_name = node_name.split(":")[0].split("^")[-1]
-
  if input_op_name not in self._nodes:
  node = self._tf_node_map[input_op_name]
  attr = self._parse_attr(node.attr)
@@ -4002,7 +4041,6 @@ def _backtrack_construct(self, node_name):
  inputs[i] = actual_input
 
  op = self._convert_operator(node.op, node.name, inputs, attr)
-
  if isinstance(op, np.ndarray):
  self._params[node.name] = tvm.nd.array(op)
  op = [
@@ -4024,7 +4062,6 @@ def _backtrack_construct(self, node_name):
  tn = node_name.split(":")
  tensor_slot = int(tn[1]) if len(tn) > 1 else 0
  return out[tensor_slot]
-
  return out[0]
 
 

tests/python/frontend/tensorflow/test_forward.py

@@ -3093,6 +3093,33 @@ def test_forward_resize():
  _test_resize_nearest_neighbor_dynamic_shape((1, 16, 16, 3), scale=[2, 2])
 
 
+#######################################################################
+# BroadcastArgs
+# -----------
+
+
+def _test_broadcast_args(in_shape_1, in_shape_2):
+ """ One iteration of broadcast_args"""
+
+ shape_1 = np.array(in_shape_1).astype("int32")
+ shape_2 = np.array(in_shape_2).astype("int32")
+
+ with tf.Graph().as_default():
+ shape_1 = constant_op.constant(shape_1, shape=shape_1.shape, dtype=shape_1.dtype)
+ shape_2 = constant_op.constant(shape_2, shape=shape_2.shape, dtype=shape_2.dtype)
+ tf.raw_ops.BroadcastArgs(s0=shape_1, s1=shape_2)
+
+ compare_tf_with_tvm(None, "", "BroadcastArgs:0", opt_level=0)
+
+
+def test_forward_broadcast_args():
+ """ Resize Bilinear """
+
+ _test_broadcast_args((4, 1, 32, 32), [4, 8, 32, 32])
+ _test_broadcast_args((6, 32, 32, 1), [6, 32, 32, 16])
+ _test_broadcast_args((32, 32, 16), [6, 32, 32, 16])
+
+
 #######################################################################
 # BroadcastTo
 # -----------
@@ -3636,7 +3663,7 @@ def test_forward_logical():
 
 
 #######################################################################
-# Where, Select
+# Where, Select, SelectV2
 # -------------
 def test_forward_where():
  """ Where: return elements depending on conditions"""