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[PartialInlining] Use DenseSet instead of DenseMap (NFC) #127170

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Merged
merged 2 commits into from
Feb 14, 2025
Merged

[PartialInlining] Use DenseSet instead of DenseMap (NFC) #127170

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[PartialInlining] Use DenseSet instead of DenseMap (NFC)
kazutakahirata Feb 13, 2025
ecbb519
Address a comment.
kazutakahirata Feb 14, 2025
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9 changes: 4 additions & 5 deletions llvm/lib/Transforms/IPO/PartialInlining.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -412,9 +412,9 @@ PartialInlinerImpl::computeOutliningColdRegionsInfo(
bool ColdCandidateFound = false;
BasicBlock *CurrEntry = EntryBlock;
std::vector<BasicBlock *> DFS;
DenseMap<BasicBlock *, bool> VisitedMap;
SmallPtrSet<BasicBlock *, 8> VisitedSet;
DFS.push_back(CurrEntry);
VisitedMap[CurrEntry] = true;
VisitedSet.insert(CurrEntry);

// Use Depth First Search on the basic blocks to find CFG edges that are
// considered cold.
Expand All @@ -432,9 +432,8 @@ PartialInlinerImpl::computeOutliningColdRegionsInfo(
BBProfileCount(ThisBB) < MinBlockCounterExecution)
continue;
for (auto SI = succ_begin(ThisBB); SI != succ_end(ThisBB); ++SI) {
if (VisitedMap[*SI])
if (!VisitedSet.insert(*SI).second)
continue;
VisitedMap[*SI] = true;
DFS.push_back(*SI);
// If branch isn't cold, we skip to the next one.
BranchProbability SuccProb = BPI.getEdgeProbability(ThisBB, *SI);
Expand Down Expand Up @@ -492,7 +491,7 @@ PartialInlinerImpl::computeOutliningColdRegionsInfo(
// at inner regions because the outer region may have live-exit
// variables.
for (auto *BB : DominateVector)
VisitedMap[BB] = true;
VisitedSet.insert(BB);

// ReturnBlock here means the block after the outline call
BasicBlock *ReturnBlock = ExitBlock->getSingleSuccessor();
Expand Down