fix bug for avg_pool

tensorflow2fluid/tf2fluid/paddle_emitter.py

@@ -594,8 +594,9 @@ class PaddleEmitter(object):
                                     pad_param)
                 node.code.add_layer("pool2d", node.output_name,
                                     node.output_name, param_attr)
+                return
         node.code.add_layer("pool2d", data.ref_name, node.output_name,
-                            param_attr)
+                                param_attr)
 
     def emit_rsqrt(self, node):
         data = node.inputs[0]
@@ -670,9 +671,22 @@ class PaddleEmitter(object):
 
         for i in range(len(strides)):
             assert strides[i] == 1
-        param_attr = {"axes": range(len(begin)), "starts": begin, "ends": end}
-        node.code.add_layer("slice", data.ref_name, node.output_name,
-                            param_attr)
+
+        if len(set(end)) == 1 and end[0] == 0:
+            output_shape = list(self.infer.get_tensor_shape(node.layer))
+            if node.data_format == NHWC and len(output_shape) == 4:
+                output_shape = [output_shape[0],
+                                output_shape[3],
+                                output_shape[1],
+                                output_shape[2]]
+                begin = [begin[0], begin[3], begin[1], begin[2]]
+            param = {"shape":output_shape, "offsets":begin}
+            node.code.add_layer("crop", data.ref_name, 
+                            node.output_name, param)
+        else:
+            param = {"axes": range(len(begin)), "starts": begin, "ends": end}
+            node.code.add_layer("slice", data.ref_name, 
+                            node.output_name, param)
 
     def emit_resizenearestneighbor(self, node):
         data = node.inputs[0]