We need to do a dedup for the dynamo output, for example in the case of

def f(a):
  a += 1
  return a

From dynamo bridge perspective there are 2 outputs.

1. input a has been inplace updated
2. return value a

However from XLA perspective there is only one output. In order to match these two thing we need a way to tell that 2 output are the same hence we need to dedup. In the test case I added, there is a copy op in the function we want to compile. In this case dynamo bridge failed to recognize copied tensor and the origional tensor are the same tensor hence the crash.