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[clang][mutation analyzer][NFC] Simplify code in ExprMutationAnalyzer #125283

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Merged
steakhal merged 2 commits into from
Feb 1, 2025
Merged

[clang][mutation analyzer][NFC] Simplify code in ExprMutationAnalyzer #125283

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b9544eb
[clang][NFC] Simplify code in ExprMutationAnalyzer
steakhal Jan 31, 2025
2f48b57
Use try_emplace
steakhal Jan 31, 2025
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12 changes: 5 additions & 7 deletions clang/lib/Analysis/ExprMutationAnalyzer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -806,17 +806,15 @@ FunctionParmMutationAnalyzer::FunctionParmMutationAnalyzer(

const Stmt *
FunctionParmMutationAnalyzer::findMutation(const ParmVarDecl *Parm) {
const auto Memoized = Results.find(Parm);
if (Memoized != Results.end())
return Memoized->second;
auto [Place, Inserted] = Results.try_emplace(Parm);
if (!Inserted)
return Place->second;

// To handle call A -> call B -> call A. Assume parameters of A is not mutated
// before analyzing parameters of A. Then when analyzing the second "call A",
// FunctionParmMutationAnalyzer can use this memoized value to avoid infinite
// recursion.
Results[Parm] = nullptr;
if (const Stmt *S = BodyAnalyzer.findMutation(Parm))
return Results[Parm] = S;
return Results[Parm];
return Place->second = BodyAnalyzer.findMutation(Parm);
}

} // namespace clang