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[SLPVectorizer] Avoid two successive hash lookups on the same key #107143

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Merged
merged 1 commit into from
Sep 3, 2024
Merged

[SLPVectorizer] Avoid two successive hash lookups on the same key #107143

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5 changes: 2 additions & 3 deletions llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -11804,10 +11804,9 @@ void BoUpSLP::reorderInputsAccordingToOpcode(ArrayRef<Value *> VL,
}

Instruction &BoUpSLP::getLastInstructionInBundle(const TreeEntry *E) {
auto It = EntryToLastInstruction.find(E);
if (It != EntryToLastInstruction.end())
return *It->second;
auto &Res = EntryToLastInstruction.try_emplace(E).first->second;
if (Res)
return *Res;
// Get the basic block this bundle is in. All instructions in the bundle
// should be in this block (except for extractelement-like instructions with
// constant indeces).
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