[Unity][Frontend][NN] Op print_ (#15604)

* print done

* fix

python/tvm/relax/frontend/nn/modules.py

@@ -53,7 +53,15 @@ def finalize(self) -> List[rx.Var]:
 
     def print_(self, tensor: Tensor) -> None:
         """Encloses the side effect of NDArray printing"""
-        raise NotImplementedError
+        self.effect = rx.BlockBuilder.current().emit(
+            rx.call_pure_packed(
+                rx.extern("effect.print"),
+                self.effect,
+                tensor._expr,  # pylint: disable=protected-access
+                sinfo_args=[rx.ObjectStructInfo()],
+            ),
+            name_hint=self.effect.name_hint,
+        )
 
 
 @register_func("effect.print")

python/tvm/relax/frontend/nn/op.py

@@ -25,6 +25,7 @@
 from ...block_builder import BlockBuilder
 from ...struct_info import TensorStructInfo, TupleStructInfo
 from .core import Tensor
+from .spec import SpecBuilder
 
 IntExpr = Union[int, _tir.PrimExpr]
 
@@ -938,3 +939,7 @@ def _convert(arg):
         ),
         name=name_hint,
     )
+
+
+def print_(array: Tensor):
+    SpecBuilder.current().io_effect.print_(array)

tests/python/relax/test_frontend_nn_op.py

@@ -15,6 +15,9 @@
 # specific language governing permissions and limitations
 # under the License.
 import pytest
+import torch
+import sys
+import io
 
 import tvm
 import tvm.testing
@@ -304,5 +307,40 @@ def test(x: R.Tensor((10, 10), dtype="float32"), _io: R.Object) -> R.Tuple(R.Ten
     tvm.ir.assert_structural_equal(irmodule, Expected)
 
 
+def test_print():
+    class Model(Module):
+        def test(self, x: Tensor):
+            z = op.add(x, x)
+            op.print_(z)
+            return x
+
+    # fmt: off
+    @I.ir_module
+    class Expected:
+        @R.function
+        def _initialize_effect() -> R.Tuple(R.Object):
+            with R.dataflow():
+                _io: R.Object = R.null_value()
+                lv: R.Tuple(R.Object) = (_io,)
+                gv: R.Tuple(R.Object) = lv
+                R.output(gv)
+            return gv
+
+        @R.function
+        def test(x: R.Tensor((10, 10), dtype="float32"), _io: R.Object) -> R.Tuple(R.Tensor((10, 10), dtype="float32"), R.Tuple(R.Object)):
+            with R.dataflow():
+                add: R.Tensor((10, 10), dtype="float32") = R.add(x, x)
+                _io1: R.Object = R.call_pure_packed("effect.print", _io, add, sinfo_args=(R.Object(),))
+                gv1: R.Tuple(R.Tensor((10, 10), dtype="float32"), R.Tuple(R.Object)) = x, (_io1,)
+                R.output(gv1)
+            return gv1
+    # fmt: on
+
+    m = Model()
+    irmodule, params = m.export_tvm(spec={"test": {"x": spec.Tensor([10, 10], "float32")}})
+
+    tvm.ir.assert_structural_equal(irmodule["test"], Expected["test"])
+
+
 if __name__ == "__main__":
     tvm.testing.main()