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/*
* Copyright (c) 2019 Samsung Electronics Co., Ltd. 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 "SqueezeCanonicalizer.h"
#include "Annotations/ShapeInferenceData.h"
#include "Dialect/TFDialect.h"
#include "Dialect/TFNodes.h"
#include "Dialect/TFNodeVisitor.h"
#include "Dialect/TFNodeImpl.h"
#include <moco/Log.h>
namespace
{
bool canonicalize_squeeze_to_reshape(loco::Graph *graph, moco::tf::TFSqueeze *node)
{
LOGGER(l);
INFO(l) << "TFNodeCanonicalize TFSqueeze begin";
/**
* This will replace shape inferred TFSqueeze node into canonical FixedReshape
*
* Before
* In ---- TFSqueeze ---- Out(s)
*
* After
* ------ TFSqueeze
* /
* In ---- FixedReshape ----- Out(s)
*/
auto squeeze_shape = node->annot<moco::tf::ShapeInferenceData>();
// canonicalize into FixedReshape is valid when squeeze has shape info
// TODO Support general Squeeze case
assert(squeeze_shape);
auto squeeze_tensor_shape = squeeze_shape->tensor_shape();
// Create loco node to replace
auto reshape = graph->nodes()->create<loco::FixedReshape>();
// Copy shape
reshape->rank(squeeze_tensor_shape.rank());
for (uint32_t axis = 0; axis < squeeze_tensor_shape.rank(); ++axis)
{
assert(squeeze_tensor_shape.dim(axis).known());
reshape->dim(axis) = squeeze_tensor_shape.dim(axis);
}
// replace
auto in = node->input();
reshape->input(in);
replace(node).with(reshape);
INFO(l) << "TFNodeCanonicalize TFSqueeze done";
return true;
}
} // namespace
namespace moco
{
namespace tf
{
bool SqueezeCanonicalizer::run(loco::Graph *graph)
{
auto active_nodes = loco::active_nodes(loco::output_nodes(graph));
bool changed = false;
for (auto node : active_nodes)
{
if (node->dialect() == TFDialect::get())
{
auto tf_squeeze = dynamic_cast<moco::tf::TFSqueeze *>(node);
if (tf_squeeze != nullptr)
{
if (canonicalize_squeeze_to_reshape(graph, tf_squeeze))
changed = true;
}
}
}
return changed;
}
} // namespace tf
} // namespace moco
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