Add parser support for SUM tflite operator (apache#4182)

Author: inadob

python/tvm/relay/frontend/tflite.py

@@ -82,6 +82,7 @@ def __init__(self, model, subgraph, exp_tab):
             'REDUCE_MAX': self._convert_reduce_max,
             'MEAN': self._convert_reduce_mean,
             'REDUCE_PROD': self._convert_reduce_prod,
+            'SUM': self._convert_reduce_sum,
             'FULLY_CONNECTED': self.convert_fully_connected,
             'PAD': self.convert_pad,
             'PACK': self.convert_pack,
@@ -672,6 +673,9 @@ def _convert_reduce_mean(self, op):
     def _convert_reduce_prod(self, op):
         return self._convert_reduce(_op.reduce.prod, op)
 
+    def _convert_reduce_sum(self, op):
+        return self._convert_reduce(_op.reduce.sum, op)
+
     def convert_fully_connected(self, op):
         """Convert TFLite fully connected"""
         try:

tests/python/frontend/tflite/test_forward.py

@@ -714,6 +714,14 @@ def _test_reduce_prod(data, keep_dims=None):
     """ One iteration of reduce_prod """
     return _test_reduce(math_ops.reduce_prod, data, keep_dims)
 
+#######################################################################
+# Reduce_sum
+# -----------
+
+def _test_reduce_sum(data, keep_dims=None):
+    """ One iteration of reduce_sum """
+    return _test_reduce(math_ops.reduce_sum, data, keep_dims)
+
 
 def _test_forward_reduce(testop):
     """ Reduce """
@@ -732,6 +740,7 @@ def test_all_reduce():
     _test_forward_reduce(_test_reduce_max)
     _test_forward_reduce(_test_reduce_mean)
     _test_forward_reduce(_test_reduce_prod)
+    _test_forward_reduce(_test_reduce_sum)
 
 
 #######################################################################