new_contents: import taichi as ti
  
  @ti.all_archs
  def test_cse():
    A = ti.var(ti.f32, shape=())
  
    @ti.kernel
    def func():
      a = 0
      a += 10
      a = a + 123
      A[None] = a
  
    func()
    assert A[None] == 133
  
  
subject: test local atomic opt