def test_if_likely():
    ib = tvm.tir.ir_builder.create()
    A = ib.pointer("float32", name="A")
    C = ib.pointer("float32", name="C")
    n = te.size_var("n")
    tx = te.thread_axis("threadIdx.x")
    ty = te.thread_axis("threadIdx.y")
    ib.scope_attr(tx, "thread_extent", 32)
    ib.scope_attr(ty, "thread_extent", 32)
    with ib.if_scope(ib.likely(tx * 32 + ty < n)):
        with ib.if_scope(ib.likely(tx * 32 + ty < n)):
            A[tx] = C[tx * 32 + ty]
    body = ib.get()
    mod = tvm.IRModule.from_expr(tvm.tir.PrimFunc([A, C, n], body))
    body = tvm.tir.transform.Simplify()(mod)["main"].body
    assert isinstance(body.body.body, tvm.tir.IfThenElse)
    assert not isinstance(body.body.body.then_case, tvm.tir.IfThenElse)