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[TableGen] Avoid repeated hash lookups (NFC) #123562

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Jan 20, 2025
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[TableGen] Avoid repeated hash lookups (NFC) #123562

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14 changes: 5 additions & 9 deletions llvm/utils/TableGen/Common/CodeGenSchedule.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -311,15 +311,13 @@ static void processSTIPredicate(STIPredicateFunction &Fn,
ConstRecVec Classes = Def->getValueAsListOfDefs("Classes");
for (const Record *EC : Classes) {
const Record *Pred = EC->getValueAsDef("Predicate");
if (!Predicate2Index.contains(Pred))
Predicate2Index[Pred] = NumUniquePredicates++;
if (Predicate2Index.try_emplace(Pred, NumUniquePredicates).second)
++NumUniquePredicates;

ConstRecVec Opcodes = EC->getValueAsListOfDefs("Opcodes");
for (const Record *Opcode : Opcodes) {
if (!Opcode2Index.contains(Opcode)) {
Opcode2Index[Opcode] = OpcodeMappings.size();
if (Opcode2Index.try_emplace(Opcode, OpcodeMappings.size()).second)
OpcodeMappings.emplace_back(Opcode, OpcodeInfo());
}
}
}
}
Expand Down Expand Up @@ -452,11 +450,9 @@ void CodeGenSchedModels::checkMCInstPredicates() const {
for (const Record *TIIPred :
Records.getAllDerivedDefinitions("TIIPredicate")) {
StringRef Name = TIIPred->getValueAsString("FunctionName");
StringMap<const Record *>::const_iterator It = TIIPredicates.find(Name);
if (It == TIIPredicates.end()) {
TIIPredicates[Name] = TIIPred;
auto [It, Inserted] = TIIPredicates.try_emplace(Name, TIIPred);
if (Inserted)
continue;
}

PrintError(TIIPred->getLoc(),
"TIIPredicate " + Name + " is multiply defined.");
Expand Down
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