code: def testHloDCE(self):
      b = xla_client.XlaBuilder("acomputation")
      p0 = ops.Parameter(
          b, 0, xla_client.shape_from_pyval(np.float32(0))
      )
      p1 = ops.Parameter(
          b, 1, xla_client.shape_from_pyval(np.zeros((4,), np.float32))
      )
      root = ops.Mul(p0, p1)
  
      # Dead instructions
      p2 = ops.Parameter(
          b, 2, xla_client.shape_from_pyval(np.float32(0))
      )
      ops.Add(p2, p2)
  
      hlo_module = b.build(root).get_hlo_module()
      self.assertTrue(xla_client._xla.HloDCE().run(hlo_module))
  
imports: import unittest
  from absl.testing import absltest
  import numpy
  from xla.python import xla_client
label_desc: Use image node_id 1 for calling the RunHloPassTest obj's underlying member method code with example usage: obj.testHloDCE() without return types