comaniac commented on a change in pull request #5656:
URL: https://github.com/apache/incubator-tvm/pull/5656#discussion_r429484128



##########
File path: tests/python/relay/test_pass_merge_composite.py
##########
@@ -64,55 +65,53 @@
 
 
 def make_add_sub_mul_pattern():
-    """Create a pattern to match the following graph.
+    r"""Create a pattern to match the following graph.
 
         add  sub
          \   /
           \ /
           mul
     """
-    x = relay.var('x')
-    y = relay.var('y')
-    add_node = relay.add(x, y)
-    sub_node = relay.subtract(x, y)
-    mul_node = relay.multiply(add_node, sub_node)
+    x = wildcard()
+    y = wildcard()
+    add_node = is_op('add')(x, y)
+    sub_node = is_op('subtract')(x, y)
+    mul_node = is_op('multiply')(add_node, sub_node)

Review comment:
       Wow that's nice to know. I'll change some patterns using this syntax to 
demonstrate the different ways of making patterns.




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