================
@@ -1151,6 +1154,311 @@ struct TargetLoongArch64 : public
GenericTarget<TargetLoongArch64> {
return GenericTarget::integerArgumentType(loc, argTy);
}
+
+ /// Flatten non-basic types, resulting in an array of types containing only
+ /// `IntegerType` and `FloatType`.
+ std::vector<mlir::Type> flattenTypeList(mlir::Location loc,
+ const mlir::Type type) const {
+ std::vector<mlir::Type> flatTypes;
+
+ llvm::TypeSwitch<mlir::Type>(type)
+ .template Case<mlir::IntegerType>([&](mlir::IntegerType intTy) {
+ if (intTy.getWidth() != 0)
+ flatTypes.push_back(intTy);
+ })
+ .template Case<mlir::FloatType>([&](mlir::FloatType floatTy) {
+ if (floatTy.getWidth() != 0)
+ flatTypes.push_back(floatTy);
+ })
+ .template Case<mlir::ComplexType>([&](mlir::ComplexType cmplx) {
+ const auto *sem = &floatToSemantics(kindMap, cmplx.getElementType());
+ if (sem == &llvm::APFloat::IEEEsingle() ||
+ sem == &llvm::APFloat::IEEEdouble() ||
+ sem == &llvm::APFloat::IEEEquad())
+ std::fill_n(std::back_inserter(flatTypes), 2,
+ cmplx.getElementType());
+ else
+ TODO(loc, "unsupported complx type(not IEEEsingle, IEEEdouble, "
+ "IEEEquad) as a structure component for BIND(C), "
+ "VALUE derived type argument and type return");
+ })
+ .template Case<fir::LogicalType>([&](fir::LogicalType logicalTy) {
+ const auto width = kindMap.getLogicalBitsize(logicalTy.getFKind());
+ if (width != 0)
+ flatTypes.push_back(
+ mlir::IntegerType::get(type.getContext(), width));
+ })
+ .template Case<fir::CharacterType>([&](fir::CharacterType charTy) {
+ flatTypes.push_back(mlir::IntegerType::get(type.getContext(), 8));
+ })
+ .template Case<fir::SequenceType>([&](fir::SequenceType seqTy) {
+ if (!seqTy.hasDynamicExtents()) {
+ std::size_t numOfEle = seqTy.getConstantArraySize();
+ auto eleTy = seqTy.getEleTy();
+ if (!mlir::isa<mlir::IntegerType, mlir::FloatType>(eleTy)) {
+ auto subTypeList = flattenTypeList(loc, eleTy);
+ if (subTypeList.size() != 0)
+ for (std::size_t i = 0; i < numOfEle; ++i)
+ llvm::copy(subTypeList, std::back_inserter(flatTypes));
+ } else {
+ std::fill_n(std::back_inserter(flatTypes), numOfEle, eleTy);
+ }
+ } else
+ TODO(loc, "unsupported dynamic extent sequence type as a structure
"
+ "component for BIND(C), "
+ "VALUE derived type argument and type return");
+ })
+ .template Case<fir::RecordType>([&](fir::RecordType recTy) {
+ for (auto component : recTy.getTypeList()) {
+ mlir::Type eleTy = component.second;
+ auto subTypeList = flattenTypeList(loc, eleTy);
+ if (subTypeList.size() != 0)
+ llvm::copy(subTypeList, std::back_inserter(flatTypes));
+ }
+ })
+ .template Case<fir::VectorType>([&](fir::VectorType vecTy) {
+ std::size_t numOfEle = vecTy.getLen();
+ auto eleTy = vecTy.getEleTy();
+ if (!(mlir::isa<mlir::IntegerType, mlir::FloatType>(eleTy))) {
+ auto subTypeList = flattenTypeList(loc, eleTy);
+ if (subTypeList.size() != 0)
+ for (std::size_t i = 0; i < numOfEle; ++i)
+ llvm::copy(subTypeList, std::back_inserter(flatTypes));
+ } else {
+ std::fill_n(std::back_inserter(flatTypes), numOfEle, eleTy);
+ }
+ })
+ .Default([&](mlir::Type ty) {
+ if (fir::conformsWithPassByRef(ty))
+ flatTypes.push_back(
+ mlir::IntegerType::get(type.getContext(), GRLen));
+ else
+ TODO(loc, "unsupported component type for BIND(C), VALUE derived "
+ "type argument and type return");
+ });
+
+ return flatTypes;
+ }
+
+ /// Determine if a struct is eligible to be passed in FARs (and GARs) (i.e.,
+ /// when flattened it contains a single fp value, fp+fp, or int+fp of
+ /// appropriate size).
+ bool detectFARsEligibleStruct(mlir::Location loc, fir::RecordType recTy,
+ mlir::Type &Field1Ty,
+ mlir::Type &Field2Ty) const {
+
+ Field1Ty = Field2Ty = nullptr;
+ auto flatTypes = flattenTypeList(loc, recTy);
+ size_t flatSize = flatTypes.size();
+
+ // Cannot be eligible if the number of flattened types is equal to 0 or
+ // greater than 2.
+ if (flatSize == 0 || flatSize > 2)
+ return false;
+
+ bool isFirstAvaliableFloat = false;
+
+ assert((mlir::isa<mlir::IntegerType, mlir::FloatType>(flatTypes[0])) &&
+ "Type must be int or float after flattening");
+ if (auto floatTy = mlir::dyn_cast<mlir::FloatType>(flatTypes[0])) {
+ auto Size = floatTy.getWidth();
+ // Can't be eligible if larger than the FP registers. Half precision
isn't
+ // currently supported on LoongArch and the ABI hasn't been confirmed, so
+ // default to the integer ABI in that case.
+ if (Size > FRLen || Size < 32)
+ return false;
+ isFirstAvaliableFloat = true;
+ Field1Ty = floatTy;
+ } else if (auto intTy = mlir::dyn_cast<mlir::IntegerType>(flatTypes[0])) {
+ if (intTy.getWidth() > GRLen)
+ return false;
+ Field1Ty = intTy;
+ }
+
+ // flatTypes has two elements
+ if (flatSize == 2) {
+ assert((mlir::isa<mlir::IntegerType, mlir::FloatType>(flatTypes[1])) &&
+ "Type must be integer or float after flattening");
+ if (auto floatTy = mlir::dyn_cast<mlir::FloatType>(flatTypes[1])) {
+ auto Size = floatTy.getWidth();
+ if (Size > FRLen || Size < 32)
+ return false;
+ Field2Ty = floatTy;
+ return true;
+ } else if (auto intTy = mlir::dyn_cast<mlir::IntegerType>(flatTypes[1]))
{
+ // Can't be eligible if an integer type was already found (int+int
pairs
+ // are not eligible).
+ if (!isFirstAvaliableFloat)
+ return false;
+ if (intTy.getWidth() > GRLen)
+ return false;
+ Field2Ty = intTy;
+ return true;
+ }
+ }
+
+ // return isFirstAvaliableFloat if flatTypes only has one element
+ return isFirstAvaliableFloat;
+ }
+
+ bool checkTypehasEnoughReg(mlir::Location loc, int &GARsLeft, int &FARsLeft,
+ const mlir::Type type) const {
+ if (type == nullptr)
+ return true;
+
+ llvm::TypeSwitch<mlir::Type>(type)
+ .template Case<mlir::IntegerType>([&](mlir::IntegerType intTy) {
+ const auto width = intTy.getWidth();
+ assert(width <= 128 &&
+ "integer type with width more than 128 bits is unexpected");
----------------
tblah wrote:
nit: I don't think flang supports integers larger than 128 bits, but it would
be easy to forget to update this line if that were added later. I think this
should be a `TODO()` so that non-assertion builds do not generate incorrect
code in this case.
https://github.com/llvm/llvm-project/pull/117108
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