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[TVMScript][Bug] Add test case for missing symbolic bounds #16877

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Apr 16, 2024
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[TVMScript][Bug] Add test case for missing symbolic bounds #16877

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24 changes: 24 additions & 0 deletions tests/python/relax/test_tvmscript_parser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2293,5 +2293,29 @@ def subroutine(x: R.Tensor, _: R.Shape(["m", "n"])) -> R.Tensor(["m", "n"]):
assert func.attrs is not None


@pytest.mark.xfail(reason="Bug: Implicit bounds not provided when parsing")
def test_function_symbolic_variables_are_annotated():
"""Symbolic variables must be exposed for struct inference

Because Relax struct inference is performed while the function is
being built, all constraints on symbolic variables that are used
for simplifications must be provided to the analyzer.
"""

@R.function(private=True)
def inferred_sinfo(A: R.Tensor(["extent"])):
extent = T.int64()
output = R.strided_slice(A, [0], [0], [extent - 1])
return output

@R.function(private=True)
def expected(A: R.Tensor(["extent"])) -> R.Tensor(["extent-1"]):
extent = T.int64()
output: R.Tensor([extent - 1]) = R.strided_slice(A, [0], [0], [extent - 1])
return output

tvm.ir.assert_structural_equal(inferred_sinfo, expected)


if __name__ == "__main__":
tvm.testing.main()
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