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[Doc] Current passes #8893

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[Doc] Current passes #8893

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23 changes: 22 additions & 1 deletion python/tvm/relay/transform/transform.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
# pylint: disable=invalid-name, unused-argument, missing-docstring, unused-import
# pylint: disable=invalid-name, unused-argument, missing-docstring, unused-import, line-too-long
"""
Relay pass transformation infrastructure.
"""
Expand Down Expand Up @@ -264,6 +264,27 @@ def FoldConstant():
-------
ret : tvm.transform.Pass
The registered pass for constant folding.

Example
-------
Before/After from the test_fold_const() in `test_pass_fold_constant.py
<https://github.com/apache/tvm/blob/main/tests/python/relay/test_pass_fold_constant.py>`_.

.. code-block:: cpp

// Before :
fn (%x: Tensor[(1, 2, 3), float32]) -> Tensor[(1, 2, 3), float32] {
%0 = add(meta[relay.Constant][0] /* ty=Tensor[(3), float32] */, meta[relay.Constant][0] /* ty=Tensor[(3), float32] */) /* ty=Tensor[(3), float32] */;
%1 = multiply(%0, 2f /* ty=float32 */) /* ty=Tensor[(3), float32] */;
%2 = add(%x, %1) /* ty=Tensor[(1, 2, 3), float32] */;
add(%2, meta[relay.Constant][0] /* ty=Tensor[(3), float32] */) /* ty=Tensor[(1, 2, 3), float32] */
}

// After :
fn (%x: Tensor[(1, 2, 3), float32]) -> Tensor[(1, 2, 3), float32] {
%0 = add(%x, meta[relay.Constant][0] /* ty=Tensor[(3), float32] */) /* ty=Tensor[(1, 2, 3), float32] */;
add(%0, meta[relay.Constant][1] /* ty=Tensor[(3), float32] */) /* ty=Tensor[(1, 2, 3), float32] */
}
"""
return _ffi_api.FoldConstant()

Expand Down