File size: 2,104 Bytes
be903e2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | // Tencent is pleased to support the open source community by making ncnn available.
//
// Copyright (C) 2022 THL A29 Limited, a Tencent company. All rights reserved.
//
// Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
// in compliance with the License. You may obtain a copy of the License at
//
// https://opensource.org/licenses/BSD-3-Clause
//
// 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 "fold_constants.h"
#include <unordered_set>
#include "storezip.h"
#include "pass_level4/dead_code_elimination.h"
namespace pnnx {
void fold_constants(Graph& graph, const std::set<std::string>& foldable_constants, const std::string& foldable_constants_zippath)
{
if (foldable_constants.empty())
return;
StoreZipReader zip;
zip.open(foldable_constants_zippath);
for (size_t i = 0; i < graph.operands.size(); i++)
{
Operand* operand = graph.operands[i];
const std::string& name = operand->name;
if (foldable_constants.find(name) == foldable_constants.end())
continue;
Operator* op = operand->producer;
if (op->type == "pnnx.Attribute")
continue;
// replace producer with attribute
Operator* op_new = graph.new_operator_before("pnnx.Attribute", std::string("pnnx_fold_") + name, op);
op_new->attrs["data"] = Attribute();
Attribute& t2 = op_new->attrs["data"];
t2.type = operand->type;
t2.shape = operand->shape;
size_t size = zip.get_file_size(name);
t2.data.resize(size);
zip.read_file(name, t2.data.data());
op_new->outputs.push_back(operand);
operand->producer = op_new;
op->outputs.clear();
}
zip.close();
// dce
dead_code_elimination(graph);
}
} // namespace pnnx
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