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/*
* Copyright (c) 2021 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 "luci/Pass/ForwardReshapeToUnaryOpPass.h"
#include <luci/IR/CircleNodes.h>
#include <luci/IR/CircleNodeVisitor.h>
#include <luci/Log.h>
#include <luci/Profile/CircleNodeOrigin.h>
#include <luci/Service/CircleShapeInference.h>
#include <luci/Service/Nodes/CircleConst.h>
#include <luci/Service/CircleNodeClone.h>
namespace
{
luci::CircleReshape *as_reshape(loco::Node *node)
{
return dynamic_cast<luci::CircleReshape *>(node);
}
luci::CircleConst *clone_shape(luci::CircleReshape *reshape)
{
const auto shape = dynamic_cast<luci::CircleConst *>(reshape->shape());
// only support CircleConst for now
if (shape == nullptr)
return nullptr;
// NOTE tflite and circle only supports S32
// TODO just check with assert() after import handles this
auto dtype = shape->dtype();
if (dtype != loco::DataType::S32)
return nullptr;
return luci::clone(shape);
}
void copy_shape(luci::CircleReshape *reshape, luci::CircleReshape *new_reshape)
{
auto ns_rank = reshape->newShape()->rank();
new_reshape->newShape()->rank(ns_rank);
for (uint32_t r = 0; r < ns_rank; ++r)
new_reshape->newShape()->dim(r) = reshape->newShape()->dim(r);
}
luci::CircleReshape *create_cloned_reshape(luci::CircleReshape *reshape)
{
assert(reshape != nullptr); // FIX_CALLER_UNLESS
luci::CircleConst *cloned_shape = clone_shape(reshape);
if (cloned_shape == nullptr)
return nullptr;
auto cloned_node = luci::clone_node(reshape, reshape->graph());
if (cloned_node == nullptr)
return nullptr;
auto new_reshape = loco::must_cast<luci::CircleReshape *>(cloned_node);
new_reshape->shape(cloned_shape);
new_reshape->name(reshape->name() + "_C");
luci::add_origin(new_reshape, luci::get_origin(reshape));
return new_reshape;
}
bool forward_reshape(luci::CircleReshape *reshape, luci::CircleAbs *abs)
{
assert(reshape != nullptr); // FIX_CALLER_UNLESS
assert(abs != nullptr); // FIX_CALLER_UNLESS
auto new_reshape = create_cloned_reshape(reshape);
if (not new_reshape)
return false;
// reconnect network
loco::replace(abs).with(new_reshape);
abs->x(reshape->tensor());
new_reshape->tensor(abs);
// Do shape inference for this node again.
abs->shape_status(luci::ShapeStatus::UNDEFINED);
return true;
}
bool forward_reshape(luci::CircleReshape *reshape, luci::CircleNeg *neg)
{
assert(reshape != nullptr);
assert(neg != nullptr);
luci::CircleConst *cloned_shape = clone_shape(reshape);
if (cloned_shape == nullptr)
return false;
auto name = reshape->name();
assert(name.length() > 0);
loco::Graph *graph = neg->graph();
// create reshape placed after neg
luci::CircleReshape *new_reshape = graph->nodes()->create<luci::CircleReshape>();
copy_shape(reshape, new_reshape);
new_reshape->shape(cloned_shape);
new_reshape->name(name + "_C");
luci::add_origin(new_reshape, luci::get_origin(reshape));
// reconnect network
loco::replace(neg).with(new_reshape);
neg->x(reshape->tensor());
new_reshape->tensor(neg);
// Do shape inference for this node again.
neg->shape_status(luci::ShapeStatus::UNDEFINED);
return true;
}
bool forward_reshape(luci::CircleReshape *reshape, luci::CircleLogistic *logit)
{
assert(reshape != nullptr); // FIX_CALLER_UNLESS
assert(logit != nullptr); // FIX_CALLER_UNLESS
auto new_reshape = create_cloned_reshape(reshape);
if (not new_reshape)
return false;
// reconnect network
loco::replace(logit).with(new_reshape);
logit->x(reshape->tensor());
new_reshape->tensor(logit);
// Do shape inference for this node again.
logit->shape_status(luci::ShapeStatus::UNDEFINED);
return true;
}
class ForwardReshape final : public luci::CircleNodeMutableVisitor<bool>
{
protected:
bool visit(luci::CircleNode *node)
{
LOGGER(l);
INFO(l) << "ForwardReshape: Unsupported operator: " << node->name() << std::endl;
return false;
}
bool visit(luci::CircleAbs *node)
{
auto reshape = as_reshape(node->x());
if (reshape == nullptr)
return false;
return forward_reshape(reshape, node);
}
bool visit(luci::CircleNeg *node)
{
auto reshape = as_reshape(node->x());
if (reshape == nullptr)
return false;
return forward_reshape(reshape, node);
}
bool visit(luci::CircleLogistic *node)
{
auto reshape = as_reshape(node->x());
if (reshape == nullptr)
return false;
return forward_reshape(reshape, node);
}
// TODO add more unary operators
};
} // namespace
namespace luci
{
/**
* BEFORE
* |
* [CircleNode] [CircleConst]
* | /
* [CircleReshape]
* / |
* [CircleNode] [(UnaryOp)]
* | | \
* | | [CircleNode]
* | | |
*
* UnaryOp: CircleNeg, ...
*
* AFTER
* |
* [CircleConst] [CircleNode]
* | / |
* [CircleReshape] [(UnaryOp)] [CircleConst]
* | | /
* [CircleNode] [CircleReshape]
* | | \
* | | [CircleNode]
* | | |
*
* Note: new [CircleReshape] after [(UnaryOp)] added
*/
bool ForwardReshapeToUnaryOpPass::run(loco::Graph *g)
{
bool changed = false;
ForwardReshape forward;
for (auto node : loco::active_nodes(loco::output_nodes(g)))
{
auto circle_node = loco::must_cast<luci::CircleNode *>(node);
if (circle_node->accept(&forward))
changed = true;
}
return changed;
}
} // namespace luci
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