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[midend-LoopAnalysis]将前置分析结果指针保存到循环特征分析类中消除冗余的分析指针传递

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This commit is contained in:
rain2133
2025-08-09 16:42:31 +08:00
parent ac3358d7e3
commit be9ac89584
2 changed files with 26 additions and 28 deletions
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38
src/midend/Pass/Analysis/LoopCharacteristics.cpp
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@@ -105,23 +105,23 @@ bool LoopCharacteristicsPass::runOnFunction(Function *F, AnalysisManager &AM) {
if (DEBUG)
std::cout << "Running LoopCharacteristicsPass on function: " << F->getName() << std::endl;
// 获取循环分析结果
auto* loopAnalysisResult = AM.getAnalysisResult<LoopAnalysisResult, LoopAnalysisPass>(F);
if (!loopAnalysisResult) {
// 获取并缓存所有需要的分析结果
loopAnalysis = AM.getAnalysisResult<LoopAnalysisResult, LoopAnalysisPass>(F);
if (!loopAnalysis) {
std::cerr << "Error: LoopAnalysisResult not available for function " << F->getName() << std::endl;
CurrentResult = std::make_unique<LoopCharacteristicsResult>(F);
return false;
}
// 如果没有循环，直接返回
if (!loopAnalysisResult->hasLoops()) {
if (!loopAnalysis->hasLoops()) {
CurrentResult = std::make_unique<LoopCharacteristicsResult>(F);
return false;
}
// 获取别名分析和副作用分析结果
auto* aliasAnalysis = AM.getAnalysisResult<AliasAnalysisResult, SysYAliasAnalysisPass>(F);
auto* sideEffectAnalysis = AM.getAnalysisResult<SideEffectAnalysisResult, SysYSideEffectAnalysisPass>();
// 获取别名分析和副作用分析结果并缓存
aliasAnalysis = AM.getAnalysisResult<AliasAnalysisResult, SysYAliasAnalysisPass>(F);
sideEffectAnalysis = AM.getAnalysisResult<SideEffectAnalysisResult, SysYSideEffectAnalysisPass>();
if (DEBUG) {
if (aliasAnalysis) std::cout << "LoopCharacteristics: Using alias analysis results" << std::endl;
@@ -130,13 +130,13 @@ bool LoopCharacteristicsPass::runOnFunction(Function *F, AnalysisManager &AM) {
CurrentResult = std::make_unique<LoopCharacteristicsResult>(F);
// 分析每个循环的特征
for (const auto& loop_ptr : loopAnalysisResult->getAllLoops()) {
// 分析每个循环的特征 - 现在不需要传递分析结果参数
for (const auto& loop_ptr : loopAnalysis->getAllLoops()) {
Loop* loop = loop_ptr.get();
auto characteristics = std::make_unique<LoopCharacteristics>(loop);
// 执行各种特征分析，传递分析结果
analyzeLoop(loop, characteristics.get(), AM, aliasAnalysis, sideEffectAnalysis);
// 执行各种特征分析，使用缓存的分析结果
analyzeLoop(loop, characteristics.get());
// 添加到结果中
CurrentResult->addLoopCharacteristics(std::move(characteristics));
@@ -153,20 +153,18 @@ bool LoopCharacteristicsPass::runOnFunction(Function *F, AnalysisManager &AM) {
return false; // 特征分析不修改IR
}
void LoopCharacteristicsPass::analyzeLoop(Loop* loop, LoopCharacteristics* characteristics,
AnalysisManager &AM, AliasAnalysisResult* aliasAnalysis,
SideEffectAnalysisResult* sideEffectAnalysis) {
void LoopCharacteristicsPass::analyzeLoop(Loop* loop, LoopCharacteristics* characteristics) {
if (DEBUG)
std::cout << " Analyzing basic characteristics of loop: " << loop->getName() << std::endl;
// 按顺序执行基础分析
// 按顺序执行基础分析 - 现在使用缓存的分析结果
computePerformanceMetrics(loop, characteristics);
analyzeLoopForm(loop, characteristics);
analyzePurityAndSideEffects(loop, characteristics, sideEffectAnalysis);
analyzePurityAndSideEffects(loop, characteristics);
identifyBasicInductionVariables(loop, characteristics);
identifyBasicLoopInvariants(loop, characteristics);
analyzeBasicLoopBounds(loop, characteristics);
analyzeBasicMemoryAccessPatterns(loop, characteristics, aliasAnalysis);
analyzeBasicMemoryAccessPatterns(loop, characteristics);
evaluateBasicOptimizationOpportunities(loop, characteristics);
}
@@ -221,8 +219,7 @@ void LoopCharacteristicsPass::analyzeLoopForm(Loop* loop, LoopCharacteristics* c
characteristics->isCountingLoop = isSimple && loop->isInnermost() && exitingBlocks.size() == 1;
}
void LoopCharacteristicsPass::analyzePurityAndSideEffects(Loop* loop, LoopCharacteristics* characteristics,
SideEffectAnalysisResult* sideEffectAnalysis) {
void LoopCharacteristicsPass::analyzePurityAndSideEffects(Loop* loop, LoopCharacteristics* characteristics) {
if (!sideEffectAnalysis) {
// 没有副作用分析结果，保守处理
characteristics->isPure = false;
@@ -237,8 +234,7 @@ void LoopCharacteristicsPass::analyzePurityAndSideEffects(Loop* loop, LoopCharac
}
}
void LoopCharacteristicsPass::analyzeBasicMemoryAccessPatterns(Loop* loop, LoopCharacteristics* characteristics,
AliasAnalysisResult* aliasAnalysis) {
void LoopCharacteristicsPass::analyzeBasicMemoryAccessPatterns(Loop* loop, LoopCharacteristics* characteristics) {
if (!aliasAnalysis) {
// 没有别名分析结果，保守处理
characteristics->accessesOnlyLocalMemory = false;