test_tir_pass_rewrite_unsafe_select.py

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# to you under the Apache License, Version 2.0 (the
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#   http://www.apache.org/licenses/LICENSE-2.0
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import tvm
from tvm import te


def test_rewrite_Select():
    ib = tvm.tir.ir_builder.create()
    A = ib.allocate("float32", 100, name="A", scope="global")
    i = te.var("i")
    y = tvm.tir.Select(i > 1, A[i-1], 1.0)
    yy = tvm.tir.ir_pass.RewriteUnsafeSelect(tvm.tir.Evaluate(y)).value

    z = tvm.tir.Select(
        tvm.tir.Select(i > 1, A[i-1], 1.0) > 0.0, A[i], 0.1)
    zz = tvm.tir.ir_pass.RewriteUnsafeSelect(tvm.tir.Evaluate(z)).value

    a = tvm.tir.Select(tvm.te.floordiv(i, 4) > 10, y, z)
    aa = tvm.tir.ir_pass.RewriteUnsafeSelect(tvm.tir.Evaluate(a)).value
    assert yy.name == "tvm_if_then_else"
    assert zz.name == "tvm_if_then_else"
    assert isinstance(aa, tvm.tir.Select)


if __name__ == "__main__":
    test_rewrite_Select()