62 lines
2.2 KiB
C++
62 lines
2.2 KiB
C++
/* Copyright 2017 The TensorFlow Authors. All Rights Reserved.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
==============================================================================*/
|
|
|
|
#include "tensorflow/compiler/tf2xla/kernels/tensor_list_utils.h"
|
|
#include "tensorflow/compiler/tf2xla/xla_op_kernel.h"
|
|
#include "tensorflow/compiler/tf2xla/xla_op_registry.h"
|
|
|
|
namespace tensorflow {
|
|
namespace {
|
|
|
|
class IdentityOp : public XlaOpKernel {
|
|
public:
|
|
explicit IdentityOp(OpKernelConstruction* context) : XlaOpKernel(context) {}
|
|
|
|
void Compile(XlaOpKernelContext* ctx) override {
|
|
for (int i = 0; i < ctx->num_inputs(); ++i) {
|
|
if (IsTensorListInput(ctx, i)) {
|
|
ctx->SetTensorListOutput(i, ctx->Input(i));
|
|
} else {
|
|
DCHECK(ctx->input_type(i) != DT_VARIANT);
|
|
// Forwards using the underlying op_kernel_context so both tensor and
|
|
// resource values are forwarded correctly.
|
|
ctx->op_kernel_context()->set_output(
|
|
i, ctx->op_kernel_context()->input(i));
|
|
}
|
|
}
|
|
}
|
|
|
|
private:
|
|
TF_DISALLOW_COPY_AND_ASSIGN(IdentityOp);
|
|
};
|
|
|
|
// XLA_* devices also register a "real" Identity operator so we suppress the
|
|
// dummy operator using CompilationOnly().
|
|
REGISTER_XLA_OP(
|
|
Name("Identity").AllowResourceTypes().AllowVariantTypes().CompilationOnly(),
|
|
IdentityOp);
|
|
REGISTER_XLA_OP(Name("IdentityN")
|
|
.AllowResourceTypes()
|
|
.AllowVariantTypes()
|
|
.CompilationOnly(),
|
|
IdentityOp);
|
|
REGISTER_XLA_OP(Name("PlaceholderWithDefault"), IdentityOp);
|
|
REGISTER_XLA_OP(Name("PreventGradient"), IdentityOp);
|
|
REGISTER_XLA_OP(Name("StopGradient").AllowVariantTypes(), IdentityOp);
|
|
REGISTER_XLA_OP(Name("Snapshot"), IdentityOp);
|
|
|
|
} // namespace
|
|
} // namespace tensorflow
|