message: [XLA:CPU] Re-enable half float tests for unary ops
  This was blocked by an LLVM bug, which was fixed in r342542.
diff: @@ -158,9 +158,6 @@ class UnaryOpsTest(xla_test.XLATestCase):
  def testFloatOps(self):
  for dtype in self.float_types:
  - # TODO(b/77694432): Half test failed on CPU, last ran on 04-06-2018.
  - if dtype == np.float16 and self.device == "XLA_CPU":
  - continue
  x = np.arange(-0.90, 0.90, 0.25)
  self._assertOpOutputMatchesExpected(
  math_ops.acos, x.astype(dtype), expected=np.arccos(x).astype(dtype))
  