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chore: import upstream snapshot with attribution

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wehub-resource-sync
2026-07-13 13:33:03 +08:00
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express/module/WhileModule.cpp
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//
// WhileModule.cpp
// MNN
//
// Created by MNN on 2020/09/10.
// Copyright © 2018, Alibaba Group Holding Limited
//
#include "WhileModule.hpp"
#include "StaticModule.hpp"
#include <MNN/expr/ExprCreator.hpp>
#include <MNN/expr/ExecutorScope.hpp>
#include "RuntimeAttr.hpp"
#include "MNN_generated.h"
//#define MNN_OPEN_TIME_TRACE
#include <MNN/AutoTime.hpp>
namespace MNN {
namespace Express {
static int _findPos(const std::vector<std::string>& names, const std::string& key) {
for (int i=0; i<names.size(); ++i) {
if (names[i] == key) {
return i;
}
}
return -1;
}
WhileModule* WhileModule::create(const Op* op, const std::map<std::string, SubGraph>& subGraph) {
auto module = new WhileModule;
module->setType("WhileModule");
std::shared_ptr<WhileModule::Info> info(new WhileModule::Info);
module->mInfo = info;
if (nullptr != op->name()) {
module->setName(op->name()->str());
}
auto whileParam = op->main_as_WhileParam();
auto bodyIter = subGraph.find(whileParam->body_graph()->str());
if (bodyIter == subGraph.end()) {
MNN_ERROR("Can't find subgraph: %s, maybe the model is breaked\n", whileParam->body_graph()->c_str());
return nullptr;
}
auto& body = bodyIter->second;
module->mBody = body.m;
module->registerModel({body.m});
if (whileParam->cond_graph() == nullptr) {
// From onnx's loop, use easy way to init
info->mOutputNumber = op->outputIndexes()->size();
info->mBodyInputNumber = op->inputIndexes()->size();
return module;
}
auto& cond = subGraph.find(whileParam->cond_graph()->str())->second;
module->mCond = cond.m;
module->registerModel({cond.m});
/** Compute map index
int mCondInputNumber;
int mBodyInputNumber;
// First mCondInputs' index, Second: inputs's index
std::vector<std::pair<int, int>> mInputForCond;
// First mBodyInputs' index, Second: inputs's index
std::vector<std::pair<int, int>> mInputForBody;
std::vector<int> mOutputFromBody;
std::vector<std::pair<int, int>> mUpdateForCond;
std::vector<std::pair<int, int>> mUpdateForBody;
std::vector<std::pair<int, int>> mCondUpdateForCond;
std::vector<std::pair<int, int>> mCondUpdateForBody;
*/
// Map Inputs
info->mBodyInputNumber = body.inputs.size();
info->mCondInputNumber = cond.inputs.size();
for (int i=0; i<whileParam->aliases_inputs()->size(); ++i) {
auto index = i;
auto data = whileParam->aliases_inputs()->GetAs<StringVec>(i);
for (int s=0; s<data->data()->size(); ++s) {
auto name = data->data()->GetAsString(s)->str();
auto bodyInputPos = _findPos(body.inputs, name);
if (bodyInputPos >= 0) {
info->mInputForBody.emplace_back(std::make_pair(bodyInputPos, i));
}
auto condInputPos = _findPos(cond.inputs, name);
if (condInputPos >= 0) {
info->mInputForCond.emplace_back(std::make_pair(condInputPos, i));
}
// if (bodyInputPos < 0 && condInputPos < 0) {
// MNN_ASSERT(false);
// }
}
}
// Map update
auto update = whileParam->aliases_updates();
std::set<int> reusedTensors;
std::map<int, int> replaceOutputs;
for (int i=0; i<update->size(); ++i) {
auto data = update->GetAs<StringVec>(i);
int bodyInputPos = -1;
int condInputPos = -1;
int bodyOutputPos = -1;
int condOutputPos = -1;
MNN_ASSERT(2 == data->data()->size());
auto outputName = data->data()->GetAsString(0)->str();
auto inputName = data->data()->GetAsString(1)->str();
bodyInputPos = _findPos(body.inputs, inputName);
condInputPos = _findPos(cond.inputs, inputName);
bodyOutputPos = _findPos(body.outputs, outputName);
condOutputPos = _findPos(cond.outputs, outputName);
auto updateBodyOutputPos = _findPos(body.outputs, inputName);
MNN_ASSERT(bodyOutputPos == -1 || condOutputPos == -1);
if (condOutputPos >= 0) {
if (bodyInputPos >= 0) {
info->mCondUpdateForBody.emplace_back(std::make_pair(bodyInputPos, condOutputPos));
}
if (condInputPos >= 0) {
info->mCondUpdateForCond.emplace_back(std::make_pair(condInputPos, condOutputPos));
}
}
if (bodyOutputPos >= 0) {
if (bodyInputPos >= 0) {
reusedTensors.insert(bodyOutputPos);
info->mUpdateForBody.emplace_back(std::make_pair(bodyInputPos, bodyOutputPos));
}
if (condInputPos >= 0) {
info->mUpdateForCond.emplace_back(std::make_pair(condInputPos, bodyOutputPos));
}
if (updateBodyOutputPos >= 0) {
replaceOutputs.insert(std::make_pair(updateBodyOutputPos, bodyOutputPos));
}
MNN_ASSERT(condInputPos >= 0 || bodyInputPos >= 0);
}
//MNN_ASSERT(bodyOutputPos >= 0 || condOutputPos >= 0);
}
MNN_ASSERT(!info->mUpdateForCond.empty());
// Map outputs
auto output = whileParam->aliases_outputs();
info->mOutputNumber = output->size();
for (int i=0; i<output->size(); ++i) {
auto data = output->GetAsString(i);
auto pos = _findPos(body.outputs, data->str());
auto posInput = _findPos(body.inputs, data->str());
//MNN_ASSERT(pos >= 0 || posInput >= 0);
if (replaceOutputs.find(pos) != replaceOutputs.end()) {
pos = replaceOutputs[pos];
}
if (pos >= 0) {
info->mOutputFromBody.emplace_back(std::make_pair(i, pos));
}
if (posInput >= 0) {
info->mOutputFromBodyInput.emplace_back(std::make_pair(i, posInput));
}
for (int j=0; j<whileParam->aliases_inputs()->size(); ++j) {
auto inputStrVec = whileParam->aliases_inputs()->GetAs<StringVec>(j);
bool find = false;
for (int k=0; k<inputStrVec->data()->size(); ++k) {
auto name = inputStrVec->data()->GetAsString(k)->str();
if (name == data->str()) {
find = true;
info->mOutputFromInput.emplace_back(j);
break;
}
}
if (find) {
break;
}
}
}
return module;
}
std::vector<Express::VARP> WhileModule::onForward(const std::vector<Express::VARP>& inputsI) {
std::vector<Express::VARP> bodyInputs(mInfo->mBodyInputNumber);
auto& inputs = inputsI;
int step = 0;
std::vector<Express::VARP> outputs(mInfo->mOutputNumber);
if (mCond == nullptr) {
auto limit = inputs[0]->readMap<int>()[0];
int cond = inputs[1]->readMap<int>()[0];
// Body Input: 2 + N, Body Output: 1 + N + K, Op output: N + K
int N = mInfo->mBodyInputNumber - 2;
int K = mInfo->mOutputNumber - N;
std::vector<std::vector<VARP>> spans(K);
std::vector<VARP> bodyOutputs;
for (int i=0; i<N; ++i) {
outputs[i] = inputs[i+2];
}
if (limit > 0 && cond > 0) {
bodyInputs = inputs;
bodyInputs[0] = _Input({}, NCHW, halide_type_of<int>());
while (step < limit && cond > 0) {
bodyInputs[0]->writeMap<int>()[0] = step;
bodyOutputs = mBody->onForward(bodyInputs);
if (bodyOutputs.empty()) {
// Has Error
return {};
}
for (int i=0; i<N; ++i) {
bodyInputs[i + 2] = bodyOutputs[i + 1];
}
for (int i=0; i<K; ++i) {
spans[i].emplace_back(bodyOutputs[1+N+i]);
}
step++;
cond = bodyOutputs[0]->readMap<int>()[0];
}
for (int i=0; i<N; ++i) {
outputs[i] = bodyOutputs[i+1];
}
}
for (int i=0; i<K; ++i) {
outputs[i+N] = _Stack(spans[i]);
}
return outputs;
}
std::vector<Express::VARP> condInputs(mInfo->mCondInputNumber);
for (auto& p : mInfo->mInputForCond) {
condInputs[p.first] = inputs[p.second];
}
for (auto& p : mInfo->mInputForBody) {
bodyInputs[p.first] = inputs[p.second];
}
for (int i = 0; i < mInfo->mOutputFromInput.size(); ++i) {
outputs[i] = inputs[mInfo->mOutputFromInput[i]];
}
while (true) {
VARP res;
{
auto condOutputs = mCond->onForward(condInputs);
if (condOutputs.empty()) {
return {};
}
res = condOutputs[0];
}
auto resPtr = res->readMap<int>();
if (resPtr[0] <= 0) {
break;
}
step++;
// MNN_PRINT("before while op name: %s, step:%d\n", name().c_str(), step);
auto bodyOutputs = mBody->onForward(bodyInputs);
if (bodyOutputs.empty()) {
return {};
}
for (auto& p : mInfo->mUpdateForCond) {
condInputs[p.first] = bodyOutputs[p.second];
}
for (auto& p : mInfo->mUpdateForBody) {
bodyInputs[p.first] = bodyOutputs[p.second];
}
for (auto& p : mInfo->mCondUpdateForCond) {
condInputs[p.first] = res;
}
for (auto& p : mInfo->mCondUpdateForBody) {
bodyInputs[p.first] = res;
}
for (int i=0; i<mInfo->mOutputFromBody.size(); ++i) {
outputs[mInfo->mOutputFromBody[i].first] = bodyOutputs[mInfo->mOutputFromBody[i].second];
}
for (int i=0; i<mInfo->mOutputFromBodyInput.size(); ++i) {
outputs[mInfo->mOutputFromBodyInput[i].first] = bodyInputs[mInfo->mOutputFromBodyInput[i].second];
}
}
for (auto o : outputs) {
MNN_ASSERT(nullptr != o);
}
return outputs;
}
Module* WhileModule::clone(CloneContext* ctx) const {
WhileModule* module(new WhileModule);
module->mInfo = mInfo;
if (nullptr != mCond.get()) {
module->mCond.reset(mCond->clone(ctx));
module->registerModel({module->mCond});
}
module->mBody.reset(mBody->clone(ctx));
module->registerModel({module->mBody});
return this->cloneBaseTo(ctx, module);
}
};
};