'Given two dictionaries of Numba IR blocks, check to make sure
the control IR and the test IR both have no array expressions.'

def _assert_no_rewrite(self, control_ir, test_ir):

    self.assertEqual(len(control_ir), len(test_ir))
    for (k, v) in control_ir.items():
        control_block = v.body
        test_block = test_ir[k].body
        self.assertEqual(len(control_block), len(test_block))
        self._assert_array_exprs(control_block, 0)
        self._assert_array_exprs(test_block, 0)
