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Diffstat (limited to 'compiler/exo/src/Pass/FuseSquaredDifferencePass.cpp')
-rw-r--r-- | compiler/exo/src/Pass/FuseSquaredDifferencePass.cpp | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/compiler/exo/src/Pass/FuseSquaredDifferencePass.cpp b/compiler/exo/src/Pass/FuseSquaredDifferencePass.cpp new file mode 100644 index 000000000..3f985a505 --- /dev/null +++ b/compiler/exo/src/Pass/FuseSquaredDifferencePass.cpp @@ -0,0 +1,86 @@ +/* + * 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 "FuseSquaredDifferencePass.h" + +#include "Check.h" + +#include "Dialect/IR/TFLNodes.h" + +namespace +{ + +/** + * @return Casted TFLMul for fusable candidate, nullptr otherwise + * + * This helper checkes fusability with following conditions: + * - TFLMul has no activation + * - TFLMul's first and second arguments are equal and TFLSub + */ +locoex::TFLMul *as_candidate(loco::Node *node) +{ + auto mul = dynamic_cast<locoex::TFLMul *>(node); + if (not mul) + return nullptr; + + // Cannot fuse mul with activation function + if (mul->fusedActivationFunction() != locoex::FusedActFunc::NONE) + return nullptr; + + if (mul->x() != mul->y()) + return nullptr; + + if (not dynamic_cast<locoex::TFLSub *>(mul->x())) + return nullptr; + + return mul; +} + +void fuse_squared_difference(locoex::TFLMul *mul) +{ + auto sub = dynamic_cast<locoex::TFLSub *>(mul->x()); + EXO_ASSERT(sub, "sub should be valid at this point"); + + // TFLSquaredDifference to replace + auto sq_diff = mul->graph()->nodes()->create<locoex::TFLSquaredDifference>(); + sq_diff->x(sub->x()); + sq_diff->y(sub->y()); + + // replace + loco::replace(mul).with(sq_diff); +} + +} // namespace + +namespace exo +{ + +bool FuseSquaredDifferencePass::run(loco::Graph *g) +{ + bool changed = false; + for (auto node : loco::active_nodes(loco::output_nodes(g))) + { + if (auto mul = as_candidate(node)) + { + fuse_squared_difference(mul); + changed = true; + } + } + + return changed; +} + +} // namespace exo |