| //===--- CodeGenTypes.cpp - Type translation for LLVM CodeGen -------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This is the code that handles AST -> LLVM type lowering. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "CodeGenTypes.h" |
| #include "CGCXXABI.h" |
| #include "CGCall.h" |
| #include "CGOpenCLRuntime.h" |
| #include "CGRecordLayout.h" |
| #include "TargetInfo.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/DeclCXX.h" |
| #include "clang/AST/DeclObjC.h" |
| #include "clang/AST/Expr.h" |
| #include "clang/AST/RecordLayout.h" |
| #include "clang/CodeGen/CGFunctionInfo.h" |
| #include "llvm/IR/DataLayout.h" |
| #include "llvm/IR/DerivedTypes.h" |
| #include "llvm/IR/Module.h" |
| |
| using namespace clang; |
| using namespace CodeGen; |
| |
| CodeGenTypes::CodeGenTypes(CodeGenModule &cgm) |
| : CGM(cgm), Context(cgm.getContext()), TheModule(cgm.getModule()), |
| Target(cgm.getTarget()), TheCXXABI(cgm.getCXXABI()), |
| TheABIInfo(cgm.getTargetCodeGenInfo().getABIInfo()) { |
| SkippedLayout = false; |
| LongDoubleReferenced = false; |
| } |
| |
| CodeGenTypes::~CodeGenTypes() { |
| for (llvm::FoldingSet<CGFunctionInfo>::iterator |
| I = FunctionInfos.begin(), E = FunctionInfos.end(); I != E; ) |
| delete &*I++; |
| } |
| |
| const CodeGenOptions &CodeGenTypes::getCodeGenOpts() const { |
| return CGM.getCodeGenOpts(); |
| } |
| |
| void CodeGenTypes::addRecordTypeName(const RecordDecl *RD, |
| llvm::StructType *Ty, |
| StringRef suffix) { |
| SmallString<256> TypeName; |
| llvm::raw_svector_ostream OS(TypeName); |
| OS << RD->getKindName() << '.'; |
| |
| // FIXME: We probably want to make more tweaks to the printing policy. For |
| // example, we should probably enable PrintCanonicalTypes and |
| // FullyQualifiedNames. |
| PrintingPolicy Policy = RD->getASTContext().getPrintingPolicy(); |
| Policy.SuppressInlineNamespace = false; |
| |
| // Name the codegen type after the typedef name |
| // if there is no tag type name available |
| if (RD->getIdentifier()) { |
| // FIXME: We should not have to check for a null decl context here. |
| // Right now we do it because the implicit Obj-C decls don't have one. |
| if (RD->getDeclContext()) |
| RD->printQualifiedName(OS, Policy); |
| else |
| RD->printName(OS, Policy); |
| } else if (const TypedefNameDecl *TDD = RD->getTypedefNameForAnonDecl()) { |
| // FIXME: We should not have to check for a null decl context here. |
| // Right now we do it because the implicit Obj-C decls don't have one. |
| if (TDD->getDeclContext()) |
| TDD->printQualifiedName(OS, Policy); |
| else |
| TDD->printName(OS); |
| } else |
| OS << "anon"; |
| |
| if (!suffix.empty()) |
| OS << suffix; |
| |
| Ty->setName(OS.str()); |
| } |
| |
| /// ConvertTypeForMem - Convert type T into a llvm::Type. This differs from |
| /// ConvertType in that it is used to convert to the memory representation for |
| /// a type. For example, the scalar representation for _Bool is i1, but the |
| /// memory representation is usually i8 or i32, depending on the target. |
| llvm::Type *CodeGenTypes::ConvertTypeForMem(QualType T, bool ForBitField) { |
| if (T->isConstantMatrixType()) { |
| const Type *Ty = Context.getCanonicalType(T).getTypePtr(); |
| const ConstantMatrixType *MT = cast<ConstantMatrixType>(Ty); |
| return llvm::ArrayType::get(ConvertType(MT->getElementType()), |
| MT->getNumRows() * MT->getNumColumns()); |
| } |
| |
| llvm::Type *R = ConvertType(T); |
| |
| // Check for the boolean vector case. |
| if (T->isExtVectorBoolType()) { |
| auto *FixedVT = cast<llvm::FixedVectorType>(R); |
| // Pad to at least one byte. |
| uint64_t BytePadded = std::max<uint64_t>(FixedVT->getNumElements(), 8); |
| return llvm::IntegerType::get(FixedVT->getContext(), BytePadded); |
| } |
| |
| // If this is a bool type, or a bit-precise integer type in a bitfield |
| // representation, map this integer to the target-specified size. |
| if ((ForBitField && T->isBitIntType()) || |
| (!T->isBitIntType() && R->isIntegerTy(1))) |
| return llvm::IntegerType::get(getLLVMContext(), |
| (unsigned)Context.getTypeSize(T)); |
| |
| // Else, don't map it. |
| return R; |
| } |
| |
| /// isRecordLayoutComplete - Return true if the specified type is already |
| /// completely laid out. |
| bool CodeGenTypes::isRecordLayoutComplete(const Type *Ty) const { |
| llvm::DenseMap<const Type*, llvm::StructType *>::const_iterator I = |
| RecordDeclTypes.find(Ty); |
| return I != RecordDeclTypes.end() && !I->second->isOpaque(); |
| } |
| |
| /// isFuncParamTypeConvertible - Return true if the specified type in a |
| /// function parameter or result position can be converted to an IR type at this |
| /// point. This boils down to being whether it is complete. |
| bool CodeGenTypes::isFuncParamTypeConvertible(QualType Ty) { |
| // Some ABIs cannot have their member pointers represented in IR unless |
| // certain circumstances have been reached. |
| if (const auto *MPT = Ty->getAs<MemberPointerType>()) |
| return getCXXABI().isMemberPointerConvertible(MPT); |
| |
| // If this isn't a tagged type, we can convert it! |
| const TagType *TT = Ty->getAs<TagType>(); |
| if (!TT) return true; |
| |
| // Incomplete types cannot be converted. |
| return !TT->isIncompleteType(); |
| } |
| |
| |
| /// Code to verify a given function type is complete, i.e. the return type |
| /// and all of the parameter types are complete. Also check to see if we are in |
| /// a RS_StructPointer context, and if so whether any struct types have been |
| /// pended. If so, we don't want to ask the ABI lowering code to handle a type |
| /// that cannot be converted to an IR type. |
| bool CodeGenTypes::isFuncTypeConvertible(const FunctionType *FT) { |
| if (!isFuncParamTypeConvertible(FT->getReturnType())) |
| return false; |
| |
| if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) |
| for (unsigned i = 0, e = FPT->getNumParams(); i != e; i++) |
| if (!isFuncParamTypeConvertible(FPT->getParamType(i))) |
| return false; |
| |
| return true; |
| } |
| |
| /// UpdateCompletedType - When we find the full definition for a TagDecl, |
| /// replace the 'opaque' type we previously made for it if applicable. |
| void CodeGenTypes::UpdateCompletedType(const TagDecl *TD) { |
| // If this is an enum being completed, then we flush all non-struct types from |
| // the cache. This allows function types and other things that may be derived |
| // from the enum to be recomputed. |
| if (const EnumDecl *ED = dyn_cast<EnumDecl>(TD)) { |
| // Only flush the cache if we've actually already converted this type. |
| if (TypeCache.count(ED->getTypeForDecl())) { |
| // Okay, we formed some types based on this. We speculated that the enum |
| // would be lowered to i32, so we only need to flush the cache if this |
| // didn't happen. |
| if (!ConvertType(ED->getIntegerType())->isIntegerTy(32)) |
| TypeCache.clear(); |
| } |
| // If necessary, provide the full definition of a type only used with a |
| // declaration so far. |
| if (CGDebugInfo *DI = CGM.getModuleDebugInfo()) |
| DI->completeType(ED); |
| return; |
| } |
| |
| // If we completed a RecordDecl that we previously used and converted to an |
| // anonymous type, then go ahead and complete it now. |
| const RecordDecl *RD = cast<RecordDecl>(TD); |
| if (RD->isDependentType()) return; |
| |
| // Only complete it if we converted it already. If we haven't converted it |
| // yet, we'll just do it lazily. |
| if (RecordDeclTypes.count(Context.getTagDeclType(RD).getTypePtr())) |
| ConvertRecordDeclType(RD); |
| |
| // If necessary, provide the full definition of a type only used with a |
| // declaration so far. |
| if (CGDebugInfo *DI = CGM.getModuleDebugInfo()) |
| DI->completeType(RD); |
| } |
| |
| void CodeGenTypes::RefreshTypeCacheForClass(const CXXRecordDecl *RD) { |
| QualType T = Context.getRecordType(RD); |
| T = Context.getCanonicalType(T); |
| |
| const Type *Ty = T.getTypePtr(); |
| if (RecordsWithOpaqueMemberPointers.count(Ty)) { |
| TypeCache.clear(); |
| RecordsWithOpaqueMemberPointers.clear(); |
| } |
| } |
| |
| static llvm::Type *getTypeForFormat(llvm::LLVMContext &VMContext, |
| const llvm::fltSemantics &format, |
| bool UseNativeHalf = false) { |
| if (&format == &llvm::APFloat::IEEEhalf()) { |
| if (UseNativeHalf) |
| return llvm::Type::getHalfTy(VMContext); |
| else |
| return llvm::Type::getInt16Ty(VMContext); |
| } |
| if (&format == &llvm::APFloat::BFloat()) |
| return llvm::Type::getBFloatTy(VMContext); |
| if (&format == &llvm::APFloat::IEEEsingle()) |
| return llvm::Type::getFloatTy(VMContext); |
| if (&format == &llvm::APFloat::IEEEdouble()) |
| return llvm::Type::getDoubleTy(VMContext); |
| if (&format == &llvm::APFloat::IEEEquad()) |
| return llvm::Type::getFP128Ty(VMContext); |
| if (&format == &llvm::APFloat::PPCDoubleDouble()) |
| return llvm::Type::getPPC_FP128Ty(VMContext); |
| if (&format == &llvm::APFloat::x87DoubleExtended()) |
| return llvm::Type::getX86_FP80Ty(VMContext); |
| llvm_unreachable("Unknown float format!"); |
| } |
| |
| llvm::Type *CodeGenTypes::ConvertFunctionTypeInternal(QualType QFT) { |
| assert(QFT.isCanonical()); |
| const FunctionType *FT = cast<FunctionType>(QFT.getTypePtr()); |
| // First, check whether we can build the full function type. If the |
| // function type depends on an incomplete type (e.g. a struct or enum), we |
| // cannot lower the function type. |
| if (!isFuncTypeConvertible(FT)) { |
| // This function's type depends on an incomplete tag type. |
| |
| // Force conversion of all the relevant record types, to make sure |
| // we re-convert the FunctionType when appropriate. |
| if (const RecordType *RT = FT->getReturnType()->getAs<RecordType>()) |
| ConvertRecordDeclType(RT->getDecl()); |
| if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) |
| for (unsigned i = 0, e = FPT->getNumParams(); i != e; i++) |
| if (const RecordType *RT = FPT->getParamType(i)->getAs<RecordType>()) |
| ConvertRecordDeclType(RT->getDecl()); |
| |
| SkippedLayout = true; |
| |
| // Return a placeholder type. |
| return llvm::StructType::get(getLLVMContext()); |
| } |
| |
| // The function type can be built; call the appropriate routines to |
| // build it. |
| const CGFunctionInfo *FI; |
| if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) { |
| FI = &arrangeFreeFunctionType( |
| CanQual<FunctionProtoType>::CreateUnsafe(QualType(FPT, 0))); |
| } else { |
| const FunctionNoProtoType *FNPT = cast<FunctionNoProtoType>(FT); |
| FI = &arrangeFreeFunctionType( |
| CanQual<FunctionNoProtoType>::CreateUnsafe(QualType(FNPT, 0))); |
| } |
| |
| llvm::Type *ResultType = nullptr; |
| // If there is something higher level prodding our CGFunctionInfo, then |
| // don't recurse into it again. |
| if (FunctionsBeingProcessed.count(FI)) { |
| |
| ResultType = llvm::StructType::get(getLLVMContext()); |
| SkippedLayout = true; |
| } else { |
| |
| // Otherwise, we're good to go, go ahead and convert it. |
| ResultType = GetFunctionType(*FI); |
| } |
| |
| return ResultType; |
| } |
| |
| /// ConvertType - Convert the specified type to its LLVM form. |
| llvm::Type *CodeGenTypes::ConvertType(QualType T) { |
| T = Context.getCanonicalType(T); |
| |
| const Type *Ty = T.getTypePtr(); |
| |
| // For the device-side compilation, CUDA device builtin surface/texture types |
| // may be represented in different types. |
| if (Context.getLangOpts().CUDAIsDevice) { |
| if (T->isCUDADeviceBuiltinSurfaceType()) { |
| if (auto *Ty = CGM.getTargetCodeGenInfo() |
| .getCUDADeviceBuiltinSurfaceDeviceType()) |
| return Ty; |
| } else if (T->isCUDADeviceBuiltinTextureType()) { |
| if (auto *Ty = CGM.getTargetCodeGenInfo() |
| .getCUDADeviceBuiltinTextureDeviceType()) |
| return Ty; |
| } |
| } |
| |
| // RecordTypes are cached and processed specially. |
| if (const RecordType *RT = dyn_cast<RecordType>(Ty)) |
| return ConvertRecordDeclType(RT->getDecl()); |
| |
| llvm::Type *CachedType = nullptr; |
| auto TCI = TypeCache.find(Ty); |
| if (TCI != TypeCache.end()) |
| CachedType = TCI->second; |
| // With expensive checks, check that the type we compute matches the |
| // cached type. |
| #ifndef EXPENSIVE_CHECKS |
| if (CachedType) |
| return CachedType; |
| #endif |
| |
| // If we don't have it in the cache, convert it now. |
| llvm::Type *ResultType = nullptr; |
| switch (Ty->getTypeClass()) { |
| case Type::Record: // Handled above. |
| #define TYPE(Class, Base) |
| #define ABSTRACT_TYPE(Class, Base) |
| #define NON_CANONICAL_TYPE(Class, Base) case Type::Class: |
| #define DEPENDENT_TYPE(Class, Base) case Type::Class: |
| #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: |
| #include "clang/AST/TypeNodes.inc" |
| llvm_unreachable("Non-canonical or dependent types aren't possible."); |
| |
| case Type::Builtin: { |
| switch (cast<BuiltinType>(Ty)->getKind()) { |
| case BuiltinType::Void: |
| case BuiltinType::ObjCId: |
| case BuiltinType::ObjCClass: |
| case BuiltinType::ObjCSel: |
| // LLVM void type can only be used as the result of a function call. Just |
| // map to the same as char. |
| ResultType = llvm::Type::getInt8Ty(getLLVMContext()); |
| break; |
| |
| case BuiltinType::Bool: |
| // Note that we always return bool as i1 for use as a scalar type. |
| ResultType = llvm::Type::getInt1Ty(getLLVMContext()); |
| break; |
| |
| case BuiltinType::Char_S: |
| case BuiltinType::Char_U: |
| case BuiltinType::SChar: |
| case BuiltinType::UChar: |
| case BuiltinType::Short: |
| case BuiltinType::UShort: |
| case BuiltinType::Int: |
| case BuiltinType::UInt: |
| case BuiltinType::Long: |
| case BuiltinType::ULong: |
| case BuiltinType::LongLong: |
| case BuiltinType::ULongLong: |
| case BuiltinType::WChar_S: |
| case BuiltinType::WChar_U: |
| case BuiltinType::Char8: |
| case BuiltinType::Char16: |
| case BuiltinType::Char32: |
| case BuiltinType::ShortAccum: |
| case BuiltinType::Accum: |
| case BuiltinType::LongAccum: |
| case BuiltinType::UShortAccum: |
| case BuiltinType::UAccum: |
| case BuiltinType::ULongAccum: |
| case BuiltinType::ShortFract: |
| case BuiltinType::Fract: |
| case BuiltinType::LongFract: |
| case BuiltinType::UShortFract: |
| case BuiltinType::UFract: |
| case BuiltinType::ULongFract: |
| case BuiltinType::SatShortAccum: |
| case BuiltinType::SatAccum: |
| case BuiltinType::SatLongAccum: |
| case BuiltinType::SatUShortAccum: |
| case BuiltinType::SatUAccum: |
| case BuiltinType::SatULongAccum: |
| case BuiltinType::SatShortFract: |
| case BuiltinType::SatFract: |
| case BuiltinType::SatLongFract: |
| case BuiltinType::SatUShortFract: |
| case BuiltinType::SatUFract: |
| case BuiltinType::SatULongFract: |
| ResultType = llvm::IntegerType::get(getLLVMContext(), |
| static_cast<unsigned>(Context.getTypeSize(T))); |
| break; |
| |
| case BuiltinType::Float16: |
| ResultType = |
| getTypeForFormat(getLLVMContext(), Context.getFloatTypeSemantics(T), |
| /* UseNativeHalf = */ true); |
| break; |
| |
| case BuiltinType::Half: |
| // Half FP can either be storage-only (lowered to i16) or native. |
| ResultType = getTypeForFormat( |
| getLLVMContext(), Context.getFloatTypeSemantics(T), |
| Context.getLangOpts().NativeHalfType || |
| !Context.getTargetInfo().useFP16ConversionIntrinsics()); |
| break; |
| case BuiltinType::LongDouble: |
| LongDoubleReferenced = true; |
| LLVM_FALLTHROUGH; |
| case BuiltinType::BFloat16: |
| case BuiltinType::Float: |
| case BuiltinType::Double: |
| case BuiltinType::Float128: |
| case BuiltinType::Ibm128: |
| ResultType = getTypeForFormat(getLLVMContext(), |
| Context.getFloatTypeSemantics(T), |
| /* UseNativeHalf = */ false); |
| break; |
| |
| case BuiltinType::NullPtr: |
| // Model std::nullptr_t as i8* |
| ResultType = llvm::PointerType::getUnqual(getLLVMContext()); |
| break; |
| |
| case BuiltinType::UInt128: |
| case BuiltinType::Int128: |
| ResultType = llvm::IntegerType::get(getLLVMContext(), 128); |
| break; |
| |
| #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
| case BuiltinType::Id: |
| #include "clang/Basic/OpenCLImageTypes.def" |
| #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
| case BuiltinType::Id: |
| #include "clang/Basic/OpenCLExtensionTypes.def" |
| case BuiltinType::OCLSampler: |
| case BuiltinType::OCLEvent: |
| case BuiltinType::OCLClkEvent: |
| case BuiltinType::OCLQueue: |
| case BuiltinType::OCLReserveID: |
| ResultType = CGM.getOpenCLRuntime().convertOpenCLSpecificType(Ty); |
| break; |
| case BuiltinType::SveInt8: |
| case BuiltinType::SveUint8: |
| case BuiltinType::SveInt8x2: |
| case BuiltinType::SveUint8x2: |
| case BuiltinType::SveInt8x3: |
| case BuiltinType::SveUint8x3: |
| case BuiltinType::SveInt8x4: |
| case BuiltinType::SveUint8x4: |
| case BuiltinType::SveInt16: |
| case BuiltinType::SveUint16: |
| case BuiltinType::SveInt16x2: |
| case BuiltinType::SveUint16x2: |
| case BuiltinType::SveInt16x3: |
| case BuiltinType::SveUint16x3: |
| case BuiltinType::SveInt16x4: |
| case BuiltinType::SveUint16x4: |
| case BuiltinType::SveInt32: |
| case BuiltinType::SveUint32: |
| case BuiltinType::SveInt32x2: |
| case BuiltinType::SveUint32x2: |
| case BuiltinType::SveInt32x3: |
| case BuiltinType::SveUint32x3: |
| case BuiltinType::SveInt32x4: |
| case BuiltinType::SveUint32x4: |
| case BuiltinType::SveInt64: |
| case BuiltinType::SveUint64: |
| case BuiltinType::SveInt64x2: |
| case BuiltinType::SveUint64x2: |
| case BuiltinType::SveInt64x3: |
| case BuiltinType::SveUint64x3: |
| case BuiltinType::SveInt64x4: |
| case BuiltinType::SveUint64x4: |
| case BuiltinType::SveBool: |
| case BuiltinType::SveBoolx2: |
| case BuiltinType::SveBoolx4: |
| case BuiltinType::SveFloat16: |
| case BuiltinType::SveFloat16x2: |
| case BuiltinType::SveFloat16x3: |
| case BuiltinType::SveFloat16x4: |
| case BuiltinType::SveFloat32: |
| case BuiltinType::SveFloat32x2: |
| case BuiltinType::SveFloat32x3: |
| case BuiltinType::SveFloat32x4: |
| case BuiltinType::SveFloat64: |
| case BuiltinType::SveFloat64x2: |
| case BuiltinType::SveFloat64x3: |
| case BuiltinType::SveFloat64x4: |
| case BuiltinType::SveBFloat16: |
| case BuiltinType::SveBFloat16x2: |
| case BuiltinType::SveBFloat16x3: |
| case BuiltinType::SveBFloat16x4: { |
| ASTContext::BuiltinVectorTypeInfo Info = |
| Context.getBuiltinVectorTypeInfo(cast<BuiltinType>(Ty)); |
| return llvm::ScalableVectorType::get(ConvertType(Info.ElementType), |
| Info.EC.getKnownMinValue() * |
| Info.NumVectors); |
| } |
| case BuiltinType::SveCount: |
| return llvm::TargetExtType::get(getLLVMContext(), "aarch64.svcount"); |
| #define PPC_VECTOR_TYPE(Name, Id, Size) \ |
| case BuiltinType::Id: \ |
| ResultType = \ |
| llvm::FixedVectorType::get(ConvertType(Context.BoolTy), Size); \ |
| break; |
| #include "clang/Basic/PPCTypes.def" |
| #define RVV_TYPE(Name, Id, SingletonId) case BuiltinType::Id: |
| #include "clang/Basic/RISCVVTypes.def" |
| { |
| ASTContext::BuiltinVectorTypeInfo Info = |
| Context.getBuiltinVectorTypeInfo(cast<BuiltinType>(Ty)); |
| // Tuple types are expressed as aggregregate types of the same scalable |
| // vector type (e.g. vint32m1x2_t is two vint32m1_t, which is {<vscale x |
| // 2 x i32>, <vscale x 2 x i32>}). |
| if (Info.NumVectors != 1) { |
| llvm::Type *EltTy = llvm::ScalableVectorType::get( |
| ConvertType(Info.ElementType), Info.EC.getKnownMinValue()); |
| llvm::SmallVector<llvm::Type *, 4> EltTys(Info.NumVectors, EltTy); |
| return llvm::StructType::get(getLLVMContext(), EltTys); |
| } |
| return llvm::ScalableVectorType::get(ConvertType(Info.ElementType), |
| Info.EC.getKnownMinValue() * |
| Info.NumVectors); |
| } |
| #define WASM_REF_TYPE(Name, MangledName, Id, SingletonId, AS) \ |
| case BuiltinType::Id: { \ |
| if (BuiltinType::Id == BuiltinType::WasmExternRef) \ |
| ResultType = CGM.getTargetCodeGenInfo().getWasmExternrefReferenceType(); \ |
| else \ |
| llvm_unreachable("Unexpected wasm reference builtin type!"); \ |
| } break; |
| #include "clang/Basic/WebAssemblyReferenceTypes.def" |
| case BuiltinType::Dependent: |
| #define BUILTIN_TYPE(Id, SingletonId) |
| #define PLACEHOLDER_TYPE(Id, SingletonId) \ |
| case BuiltinType::Id: |
| #include "clang/AST/BuiltinTypes.def" |
| llvm_unreachable("Unexpected placeholder builtin type!"); |
| } |
| break; |
| } |
| case Type::Auto: |
| case Type::DeducedTemplateSpecialization: |
| llvm_unreachable("Unexpected undeduced type!"); |
| case Type::Complex: { |
| llvm::Type *EltTy = ConvertType(cast<ComplexType>(Ty)->getElementType()); |
| ResultType = llvm::StructType::get(EltTy, EltTy); |
| break; |
| } |
| case Type::LValueReference: |
| case Type::RValueReference: { |
| const ReferenceType *RTy = cast<ReferenceType>(Ty); |
| QualType ETy = RTy->getPointeeType(); |
| unsigned AS = getTargetAddressSpace(ETy); |
| ResultType = llvm::PointerType::get(getLLVMContext(), AS); |
| break; |
| } |
| case Type::Pointer: { |
| const PointerType *PTy = cast<PointerType>(Ty); |
| QualType ETy = PTy->getPointeeType(); |
| unsigned AS = getTargetAddressSpace(ETy); |
| ResultType = llvm::PointerType::get(getLLVMContext(), AS); |
| break; |
| } |
| |
| case Type::VariableArray: { |
| const VariableArrayType *A = cast<VariableArrayType>(Ty); |
| assert(A->getIndexTypeCVRQualifiers() == 0 && |
| "FIXME: We only handle trivial array types so far!"); |
| // VLAs resolve to the innermost element type; this matches |
| // the return of alloca, and there isn't any obviously better choice. |
| ResultType = ConvertTypeForMem(A->getElementType()); |
| break; |
| } |
| case Type::IncompleteArray: { |
| const IncompleteArrayType *A = cast<IncompleteArrayType>(Ty); |
| assert(A->getIndexTypeCVRQualifiers() == 0 && |
| "FIXME: We only handle trivial array types so far!"); |
| // int X[] -> [0 x int], unless the element type is not sized. If it is |
| // unsized (e.g. an incomplete struct) just use [0 x i8]. |
| ResultType = ConvertTypeForMem(A->getElementType()); |
| if (!ResultType->isSized()) { |
| SkippedLayout = true; |
| ResultType = llvm::Type::getInt8Ty(getLLVMContext()); |
| } |
| ResultType = llvm::ArrayType::get(ResultType, 0); |
| break; |
| } |
| case Type::ArrayParameter: |
| case Type::ConstantArray: { |
| const ConstantArrayType *A = cast<ConstantArrayType>(Ty); |
| llvm::Type *EltTy = ConvertTypeForMem(A->getElementType()); |
| |
| // Lower arrays of undefined struct type to arrays of i8 just to have a |
| // concrete type. |
| if (!EltTy->isSized()) { |
| SkippedLayout = true; |
| EltTy = llvm::Type::getInt8Ty(getLLVMContext()); |
| } |
| |
| ResultType = llvm::ArrayType::get(EltTy, A->getZExtSize()); |
| break; |
| } |
| case Type::ExtVector: |
| case Type::Vector: { |
| const auto *VT = cast<VectorType>(Ty); |
| // An ext_vector_type of Bool is really a vector of bits. |
| llvm::Type *IRElemTy = VT->isExtVectorBoolType() |
| ? llvm::Type::getInt1Ty(getLLVMContext()) |
| : ConvertType(VT->getElementType()); |
| ResultType = llvm::FixedVectorType::get(IRElemTy, VT->getNumElements()); |
| break; |
| } |
| case Type::ConstantMatrix: { |
| const ConstantMatrixType *MT = cast<ConstantMatrixType>(Ty); |
| ResultType = |
| llvm::FixedVectorType::get(ConvertType(MT->getElementType()), |
| MT->getNumRows() * MT->getNumColumns()); |
| break; |
| } |
| case Type::FunctionNoProto: |
| case Type::FunctionProto: |
| ResultType = ConvertFunctionTypeInternal(T); |
| break; |
| case Type::ObjCObject: |
| ResultType = ConvertType(cast<ObjCObjectType>(Ty)->getBaseType()); |
| break; |
| |
| case Type::ObjCInterface: { |
| // Objective-C interfaces are always opaque (outside of the |
| // runtime, which can do whatever it likes); we never refine |
| // these. |
| llvm::Type *&T = InterfaceTypes[cast<ObjCInterfaceType>(Ty)]; |
| if (!T) |
| T = llvm::StructType::create(getLLVMContext()); |
| ResultType = T; |
| break; |
| } |
| |
| case Type::ObjCObjectPointer: |
| ResultType = llvm::PointerType::getUnqual(getLLVMContext()); |
| break; |
| |
| case Type::Enum: { |
| const EnumDecl *ED = cast<EnumType>(Ty)->getDecl(); |
| if (ED->isCompleteDefinition() || ED->isFixed()) |
| return ConvertType(ED->getIntegerType()); |
| // Return a placeholder 'i32' type. This can be changed later when the |
| // type is defined (see UpdateCompletedType), but is likely to be the |
| // "right" answer. |
| ResultType = llvm::Type::getInt32Ty(getLLVMContext()); |
| break; |
| } |
| |
| case Type::BlockPointer: { |
| // Block pointers lower to function type. For function type, |
| // getTargetAddressSpace() returns default address space for |
| // function pointer i.e. program address space. Therefore, for block |
| // pointers, it is important to pass the pointee AST address space when |
| // calling getTargetAddressSpace(), to ensure that we get the LLVM IR |
| // address space for data pointers and not function pointers. |
| const QualType FTy = cast<BlockPointerType>(Ty)->getPointeeType(); |
| unsigned AS = Context.getTargetAddressSpace(FTy.getAddressSpace()); |
| ResultType = llvm::PointerType::get(getLLVMContext(), AS); |
| break; |
| } |
| |
| case Type::MemberPointer: { |
| auto *MPTy = cast<MemberPointerType>(Ty); |
| if (!getCXXABI().isMemberPointerConvertible(MPTy)) { |
| auto *C = MPTy->getClass(); |
| auto Insertion = RecordsWithOpaqueMemberPointers.insert({C, nullptr}); |
| if (Insertion.second) |
| Insertion.first->second = llvm::StructType::create(getLLVMContext()); |
| ResultType = Insertion.first->second; |
| } else { |
| ResultType = getCXXABI().ConvertMemberPointerType(MPTy); |
| } |
| break; |
| } |
| |
| case Type::Atomic: { |
| QualType valueType = cast<AtomicType>(Ty)->getValueType(); |
| ResultType = ConvertTypeForMem(valueType); |
| |
| // Pad out to the inflated size if necessary. |
| uint64_t valueSize = Context.getTypeSize(valueType); |
| uint64_t atomicSize = Context.getTypeSize(Ty); |
| if (valueSize != atomicSize) { |
| assert(valueSize < atomicSize); |
| llvm::Type *elts[] = { |
| ResultType, |
| llvm::ArrayType::get(CGM.Int8Ty, (atomicSize - valueSize) / 8) |
| }; |
| ResultType = |
| llvm::StructType::get(getLLVMContext(), llvm::ArrayRef(elts)); |
| } |
| break; |
| } |
| case Type::Pipe: { |
| ResultType = CGM.getOpenCLRuntime().getPipeType(cast<PipeType>(Ty)); |
| break; |
| } |
| case Type::BitInt: { |
| const auto &EIT = cast<BitIntType>(Ty); |
| ResultType = llvm::Type::getIntNTy(getLLVMContext(), EIT->getNumBits()); |
| break; |
| } |
| } |
| |
| assert(ResultType && "Didn't convert a type?"); |
| assert((!CachedType || CachedType == ResultType) && |
| "Cached type doesn't match computed type"); |
| |
| TypeCache[Ty] = ResultType; |
| return ResultType; |
| } |
| |
| bool CodeGenModule::isPaddedAtomicType(QualType type) { |
| return isPaddedAtomicType(type->castAs<AtomicType>()); |
| } |
| |
| bool CodeGenModule::isPaddedAtomicType(const AtomicType *type) { |
| return Context.getTypeSize(type) != Context.getTypeSize(type->getValueType()); |
| } |
| |
| /// ConvertRecordDeclType - Lay out a tagged decl type like struct or union. |
| llvm::StructType *CodeGenTypes::ConvertRecordDeclType(const RecordDecl *RD) { |
| // TagDecl's are not necessarily unique, instead use the (clang) |
| // type connected to the decl. |
| const Type *Key = Context.getTagDeclType(RD).getTypePtr(); |
| |
| llvm::StructType *&Entry = RecordDeclTypes[Key]; |
| |
| // If we don't have a StructType at all yet, create the forward declaration. |
| if (!Entry) { |
| Entry = llvm::StructType::create(getLLVMContext()); |
| addRecordTypeName(RD, Entry, ""); |
| } |
| llvm::StructType *Ty = Entry; |
| |
| // If this is still a forward declaration, or the LLVM type is already |
| // complete, there's nothing more to do. |
| RD = RD->getDefinition(); |
| if (!RD || !RD->isCompleteDefinition() || !Ty->isOpaque()) |
| return Ty; |
| |
| // Force conversion of non-virtual base classes recursively. |
| if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(RD)) { |
| for (const auto &I : CRD->bases()) { |
| if (I.isVirtual()) continue; |
| ConvertRecordDeclType(I.getType()->castAs<RecordType>()->getDecl()); |
| } |
| } |
| |
| // Layout fields. |
| std::unique_ptr<CGRecordLayout> Layout = ComputeRecordLayout(RD, Ty); |
| CGRecordLayouts[Key] = std::move(Layout); |
| |
| // If this struct blocked a FunctionType conversion, then recompute whatever |
| // was derived from that. |
| // FIXME: This is hugely overconservative. |
| if (SkippedLayout) |
| TypeCache.clear(); |
| |
| return Ty; |
| } |
| |
| /// getCGRecordLayout - Return record layout info for the given record decl. |
| const CGRecordLayout & |
| CodeGenTypes::getCGRecordLayout(const RecordDecl *RD) { |
| const Type *Key = Context.getTagDeclType(RD).getTypePtr(); |
| |
| auto I = CGRecordLayouts.find(Key); |
| if (I != CGRecordLayouts.end()) |
| return *I->second; |
| // Compute the type information. |
| ConvertRecordDeclType(RD); |
| |
| // Now try again. |
| I = CGRecordLayouts.find(Key); |
| |
| assert(I != CGRecordLayouts.end() && |
| "Unable to find record layout information for type"); |
| return *I->second; |
| } |
| |
| bool CodeGenTypes::isPointerZeroInitializable(QualType T) { |
| assert((T->isAnyPointerType() || T->isBlockPointerType()) && "Invalid type"); |
| return isZeroInitializable(T); |
| } |
| |
| bool CodeGenTypes::isZeroInitializable(QualType T) { |
| if (T->getAs<PointerType>()) |
| return Context.getTargetNullPointerValue(T) == 0; |
| |
| if (const auto *AT = Context.getAsArrayType(T)) { |
| if (isa<IncompleteArrayType>(AT)) |
| return true; |
| if (const auto *CAT = dyn_cast<ConstantArrayType>(AT)) |
| if (Context.getConstantArrayElementCount(CAT) == 0) |
| return true; |
| T = Context.getBaseElementType(T); |
| } |
| |
| // Records are non-zero-initializable if they contain any |
| // non-zero-initializable subobjects. |
| if (const RecordType *RT = T->getAs<RecordType>()) { |
| const RecordDecl *RD = RT->getDecl(); |
| return isZeroInitializable(RD); |
| } |
| |
| // We have to ask the ABI about member pointers. |
| if (const MemberPointerType *MPT = T->getAs<MemberPointerType>()) |
| return getCXXABI().isZeroInitializable(MPT); |
| |
| // Everything else is okay. |
| return true; |
| } |
| |
| bool CodeGenTypes::isZeroInitializable(const RecordDecl *RD) { |
| return getCGRecordLayout(RD).isZeroInitializable(); |
| } |
| |
| unsigned CodeGenTypes::getTargetAddressSpace(QualType T) const { |
| // Return the address space for the type. If the type is a |
| // function type without an address space qualifier, the |
| // program address space is used. Otherwise, the target picks |
| // the best address space based on the type information |
| return T->isFunctionType() && !T.hasAddressSpace() |
| ? getDataLayout().getProgramAddressSpace() |
| : getContext().getTargetAddressSpace(T.getAddressSpace()); |
| } |
