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[CodeGen] Avoid repeated map lookups (NFC) #127025

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Merged
kazutakahirata merged 1 commit into from
Feb 13, 2025
Merged

[CodeGen] Avoid repeated map lookups (NFC) #127025

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4 changes: 2 additions & 2 deletions llvm/lib/CodeGen/LiveStacks.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -62,8 +62,8 @@ LiveStacks::getOrCreateInterval(int Slot, const TargetRegisterClass *RC) {
S2RCMap.insert(std::make_pair(Slot, RC));
} else {
// Use the largest common subclass register class.
const TargetRegisterClass *OldRC = S2RCMap[Slot];
S2RCMap[Slot] = TRI->getCommonSubClass(OldRC, RC);
const TargetRegisterClass *&OldRC = S2RCMap[Slot];
OldRC = TRI->getCommonSubClass(OldRC, RC);
}
return I->second;
}
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