1/* Copyright 2022 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16#include "tensorflow/core/ir/tf_op_registry.h"
17
18#include "tensorflow/core/framework/op.h"
19#include "tensorflow/core/framework/op_def_builder.h"
20#include "tensorflow/core/ir/ops.h"
21
22namespace mlir {
23namespace tfg {
24TensorFlowOpRegistryInterface::TensorFlowOpRegistryInterface(Dialect *dialect)
25 : TensorFlowOpRegistryInterface(dialect, tensorflow::OpRegistry::Global()) {
26}
27
28// Returns true if the op is stateful.
29static bool IsStatefulImpl(const tensorflow::OpRegistry *registry,
30 StringRef op_name) {
31 const tensorflow::OpRegistrationData *op_reg_data =
32 registry->LookUp(op_name.str());
33 // If an op definition was not found, conservatively assume stateful.
34 if (!op_reg_data) return true;
35 return op_reg_data->op_def.is_stateful();
36}
37
38bool TensorFlowOpRegistryInterface::isStateful(Operation *op) const {
39 // Handle TFG internal ops.
40 if (op->hasTrait<OpTrait::IntrinsicOperation>()) return false;
41 if (auto func = dyn_cast<GraphFuncOp>(op)) return func.getIsStateful();
42 // Handle TFG region ops.
43 // TODO(jeffniu): Region ops should be marked with a trait.
44 StringRef op_name = op->getName().stripDialect();
45 if (op->getNumRegions() && op_name.endswith("Region"))
46 op_name = op_name.drop_back(/*len("Region")=*/6);
47 return IsStatefulImpl(registry_, op_name);
48}
49} // namespace tfg
50} // namespace mlir
51