code: def test_no_change_if_already_ssa():
      """A module that is already SSA should be unchanged"""
  
      @I.ir_module
      class before:
          @T.prim_func
          def func(A: T.Buffer(1, "float32")):
              T.evaluate(A[0])
  
      after = tvm.tir.transform.ConvertSSA()(before)
      tvm.ir.assert_structural_equal(before, after)
      assert before.same_as(after)
  
imports: import tvm
  import tvm.testing
  from tvm import tir
  from tvm.script import tir, ir
label_desc: Use image node_id 1 for calling a global function with example usage: test_no_change_if_already_ssa() without return types