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[OpenMP] Add TargetAMDGPU support for Complex argument and return types #144924

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[OpenMP] Add TargetAMDGPU support for Complex argument and return types #144924

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25 changes: 23 additions & 2 deletions flang/lib/Optimizer/CodeGen/Target.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1443,14 +1443,35 @@ struct TargetAMDGPU : public GenericTarget<TargetAMDGPU> {
CodeGenSpecifics::Marshalling
complexArgumentType(mlir::Location loc, mlir::Type eleTy) const override {
CodeGenSpecifics::Marshalling marshal;
TODO(loc, "handle complex argument types");
const auto *sem = &floatToSemantics(kindMap, eleTy);
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Copilot AI Jun 19, 2025

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[nitpick] Consider refactoring the common logic used to compute float semantics in both complexArgumentType and complexReturnType to reduce duplication and improve maintainability.

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if (sem == &llvm::APFloat::IEEEsingle()) {
// Lower COMPLEX(KIND=4) as an array of two element values.
marshal.emplace_back(fir::SequenceType::get({2}, eleTy), AT{});
} else if (sem == &llvm::APFloat::IEEEdouble()) {
// Pass COMPLEX(KIND=8) as two separate arguments.
marshal.emplace_back(eleTy, AT{});
marshal.emplace_back(eleTy, AT{});
} else {
typeTodo(sem, loc, "argument");
}
return marshal;
}

CodeGenSpecifics::Marshalling
complexReturnType(mlir::Location loc, mlir::Type eleTy) const override {
CodeGenSpecifics::Marshalling marshal;
TODO(loc, "handle complex return types");
const auto *sem = &floatToSemantics(kindMap, eleTy);
if (sem == &llvm::APFloat::IEEEsingle()) {
// Return COMPLEX(KIND=4) as an array of two elements.
marshal.emplace_back(fir::SequenceType::get({2}, eleTy), AT{});
} else if (sem == &llvm::APFloat::IEEEdouble()) {
// Return COMPLEX(KIND=8) via an aggregate with two fields.
marshal.emplace_back(mlir::TupleType::get(eleTy.getContext(),
mlir::TypeRange{eleTy, eleTy}),
AT{});
} else {
typeTodo(sem, loc, "return");
}
return marshal;
}
};
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