| //===--- DIBuilder.cpp - Debug Information Builder ------------------------===// |
| // |
| // 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 file implements the DIBuilder. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/IR/DIBuilder.h" |
| #include "LLVMContextImpl.h" |
| #include "llvm/ADT/Optional.h" |
| #include "llvm/ADT/STLExtras.h" |
| #include "llvm/BinaryFormat/Dwarf.h" |
| #include "llvm/IR/Constants.h" |
| #include "llvm/IR/DebugInfo.h" |
| #include "llvm/IR/IRBuilder.h" |
| #include "llvm/IR/IntrinsicInst.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/Debug.h" |
| |
| using namespace llvm; |
| using namespace llvm::dwarf; |
| |
| static cl::opt<bool> |
| UseDbgAddr("use-dbg-addr", |
| llvm::cl::desc("Use llvm.dbg.addr for all local variables"), |
| cl::init(false), cl::Hidden); |
| |
| DIBuilder::DIBuilder(Module &m, bool AllowUnresolvedNodes, DICompileUnit *CU) |
| : M(m), VMContext(M.getContext()), CUNode(CU), |
| DeclareFn(nullptr), ValueFn(nullptr), LabelFn(nullptr), |
| AllowUnresolvedNodes(AllowUnresolvedNodes) {} |
| |
| void DIBuilder::trackIfUnresolved(MDNode *N) { |
| if (!N) |
| return; |
| if (N->isResolved()) |
| return; |
| |
| assert(AllowUnresolvedNodes && "Cannot handle unresolved nodes"); |
| UnresolvedNodes.emplace_back(N); |
| } |
| |
| void DIBuilder::finalizeSubprogram(DISubprogram *SP) { |
| MDTuple *Temp = SP->getRetainedNodes().get(); |
| if (!Temp || !Temp->isTemporary()) |
| return; |
| |
| SmallVector<Metadata *, 16> RetainedNodes; |
| |
| auto PV = PreservedVariables.find(SP); |
| if (PV != PreservedVariables.end()) |
| RetainedNodes.append(PV->second.begin(), PV->second.end()); |
| |
| auto PL = PreservedLabels.find(SP); |
| if (PL != PreservedLabels.end()) |
| RetainedNodes.append(PL->second.begin(), PL->second.end()); |
| |
| DINodeArray Node = getOrCreateArray(RetainedNodes); |
| |
| TempMDTuple(Temp)->replaceAllUsesWith(Node.get()); |
| } |
| |
| void DIBuilder::finalize() { |
| if (!CUNode) { |
| assert(!AllowUnresolvedNodes && |
| "creating type nodes without a CU is not supported"); |
| return; |
| } |
| |
| CUNode->replaceEnumTypes(MDTuple::get(VMContext, AllEnumTypes)); |
| |
| SmallVector<Metadata *, 16> RetainValues; |
| // Declarations and definitions of the same type may be retained. Some |
| // clients RAUW these pairs, leaving duplicates in the retained types |
| // list. Use a set to remove the duplicates while we transform the |
| // TrackingVHs back into Values. |
| SmallPtrSet<Metadata *, 16> RetainSet; |
| for (unsigned I = 0, E = AllRetainTypes.size(); I < E; I++) |
| if (RetainSet.insert(AllRetainTypes[I]).second) |
| RetainValues.push_back(AllRetainTypes[I]); |
| |
| if (!RetainValues.empty()) |
| CUNode->replaceRetainedTypes(MDTuple::get(VMContext, RetainValues)); |
| |
| DISubprogramArray SPs = MDTuple::get(VMContext, AllSubprograms); |
| for (auto *SP : SPs) |
| finalizeSubprogram(SP); |
| for (auto *N : RetainValues) |
| if (auto *SP = dyn_cast<DISubprogram>(N)) |
| finalizeSubprogram(SP); |
| |
| if (!AllGVs.empty()) |
| CUNode->replaceGlobalVariables(MDTuple::get(VMContext, AllGVs)); |
| |
| if (!AllImportedModules.empty()) |
| CUNode->replaceImportedEntities(MDTuple::get( |
| VMContext, SmallVector<Metadata *, 16>(AllImportedModules.begin(), |
| AllImportedModules.end()))); |
| |
| for (const auto &I : AllMacrosPerParent) { |
| // DIMacroNode's with nullptr parent are DICompileUnit direct children. |
| if (!I.first) { |
| CUNode->replaceMacros(MDTuple::get(VMContext, I.second.getArrayRef())); |
| continue; |
| } |
| // Otherwise, it must be a temporary DIMacroFile that need to be resolved. |
| auto *TMF = cast<DIMacroFile>(I.first); |
| auto *MF = DIMacroFile::get(VMContext, dwarf::DW_MACINFO_start_file, |
| TMF->getLine(), TMF->getFile(), |
| getOrCreateMacroArray(I.second.getArrayRef())); |
| replaceTemporary(llvm::TempDIMacroNode(TMF), MF); |
| } |
| |
| // Now that all temp nodes have been replaced or deleted, resolve remaining |
| // cycles. |
| for (const auto &N : UnresolvedNodes) |
| if (N && !N->isResolved()) |
| N->resolveCycles(); |
| UnresolvedNodes.clear(); |
| |
| // Can't handle unresolved nodes anymore. |
| AllowUnresolvedNodes = false; |
| } |
| |
| /// If N is compile unit return NULL otherwise return N. |
| static DIScope *getNonCompileUnitScope(DIScope *N) { |
| if (!N || isa<DICompileUnit>(N)) |
| return nullptr; |
| return cast<DIScope>(N); |
| } |
| |
| DICompileUnit *DIBuilder::createCompileUnit( |
| unsigned Lang, DIFile *File, StringRef Producer, bool isOptimized, |
| StringRef Flags, unsigned RunTimeVer, StringRef SplitName, |
| DICompileUnit::DebugEmissionKind Kind, uint64_t DWOId, |
| bool SplitDebugInlining, bool DebugInfoForProfiling, |
| DICompileUnit::DebugNameTableKind NameTableKind, bool RangesBaseAddress) { |
| |
| assert(((Lang <= dwarf::DW_LANG_Fortran08 && Lang >= dwarf::DW_LANG_C89) || |
| (Lang <= dwarf::DW_LANG_hi_user && Lang >= dwarf::DW_LANG_lo_user)) && |
| "Invalid Language tag"); |
| |
| assert(!CUNode && "Can only make one compile unit per DIBuilder instance"); |
| CUNode = DICompileUnit::getDistinct( |
| VMContext, Lang, File, Producer, isOptimized, Flags, RunTimeVer, |
| SplitName, Kind, nullptr, nullptr, nullptr, nullptr, nullptr, DWOId, |
| SplitDebugInlining, DebugInfoForProfiling, NameTableKind, |
| RangesBaseAddress); |
| |
| // Create a named metadata so that it is easier to find cu in a module. |
| NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.cu"); |
| NMD->addOperand(CUNode); |
| trackIfUnresolved(CUNode); |
| return CUNode; |
| } |
| |
| static DIImportedEntity * |
| createImportedModule(LLVMContext &C, dwarf::Tag Tag, DIScope *Context, |
| Metadata *NS, DIFile *File, unsigned Line, StringRef Name, |
| SmallVectorImpl<TrackingMDNodeRef> &AllImportedModules) { |
| if (Line) |
| assert(File && "Source location has line number but no file"); |
| unsigned EntitiesCount = C.pImpl->DIImportedEntitys.size(); |
| auto *M = DIImportedEntity::get(C, Tag, Context, cast_or_null<DINode>(NS), |
| File, Line, Name); |
| if (EntitiesCount < C.pImpl->DIImportedEntitys.size()) |
| // A new Imported Entity was just added to the context. |
| // Add it to the Imported Modules list. |
| AllImportedModules.emplace_back(M); |
| return M; |
| } |
| |
| DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context, |
| DINamespace *NS, DIFile *File, |
| unsigned Line) { |
| return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module, |
| Context, NS, File, Line, StringRef(), |
| AllImportedModules); |
| } |
| |
| DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context, |
| DIImportedEntity *NS, |
| DIFile *File, unsigned Line) { |
| return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module, |
| Context, NS, File, Line, StringRef(), |
| AllImportedModules); |
| } |
| |
| DIImportedEntity *DIBuilder::createImportedModule(DIScope *Context, DIModule *M, |
| DIFile *File, unsigned Line) { |
| return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_module, |
| Context, M, File, Line, StringRef(), |
| AllImportedModules); |
| } |
| |
| DIImportedEntity *DIBuilder::createImportedDeclaration(DIScope *Context, |
| DINode *Decl, |
| DIFile *File, |
| unsigned Line, |
| StringRef Name) { |
| // Make sure to use the unique identifier based metadata reference for |
| // types that have one. |
| return ::createImportedModule(VMContext, dwarf::DW_TAG_imported_declaration, |
| Context, Decl, File, Line, Name, |
| AllImportedModules); |
| } |
| |
| DIFile *DIBuilder::createFile(StringRef Filename, StringRef Directory, |
| Optional<DIFile::ChecksumInfo<StringRef>> CS, |
| Optional<StringRef> Source) { |
| return DIFile::get(VMContext, Filename, Directory, CS, Source); |
| } |
| |
| DIMacro *DIBuilder::createMacro(DIMacroFile *Parent, unsigned LineNumber, |
| unsigned MacroType, StringRef Name, |
| StringRef Value) { |
| assert(!Name.empty() && "Unable to create macro without name"); |
| assert((MacroType == dwarf::DW_MACINFO_undef || |
| MacroType == dwarf::DW_MACINFO_define) && |
| "Unexpected macro type"); |
| auto *M = DIMacro::get(VMContext, MacroType, LineNumber, Name, Value); |
| AllMacrosPerParent[Parent].insert(M); |
| return M; |
| } |
| |
| DIMacroFile *DIBuilder::createTempMacroFile(DIMacroFile *Parent, |
| unsigned LineNumber, DIFile *File) { |
| auto *MF = DIMacroFile::getTemporary(VMContext, dwarf::DW_MACINFO_start_file, |
| LineNumber, File, DIMacroNodeArray()) |
| .release(); |
| AllMacrosPerParent[Parent].insert(MF); |
| // Add the new temporary DIMacroFile to the macro per parent map as a parent. |
| // This is needed to assure DIMacroFile with no children to have an entry in |
| // the map. Otherwise, it will not be resolved in DIBuilder::finalize(). |
| AllMacrosPerParent.insert({MF, {}}); |
| return MF; |
| } |
| |
| DIEnumerator *DIBuilder::createEnumerator(StringRef Name, int64_t Val, |
| bool IsUnsigned) { |
| assert(!Name.empty() && "Unable to create enumerator without name"); |
| return DIEnumerator::get(VMContext, Val, IsUnsigned, Name); |
| } |
| |
| DIBasicType *DIBuilder::createUnspecifiedType(StringRef Name) { |
| assert(!Name.empty() && "Unable to create type without name"); |
| return DIBasicType::get(VMContext, dwarf::DW_TAG_unspecified_type, Name); |
| } |
| |
| DIBasicType *DIBuilder::createNullPtrType() { |
| return createUnspecifiedType("decltype(nullptr)"); |
| } |
| |
| DIBasicType *DIBuilder::createBasicType(StringRef Name, uint64_t SizeInBits, |
| unsigned Encoding, |
| DINode::DIFlags Flags) { |
| assert(!Name.empty() && "Unable to create type without name"); |
| return DIBasicType::get(VMContext, dwarf::DW_TAG_base_type, Name, SizeInBits, |
| 0, Encoding, Flags); |
| } |
| |
| DIDerivedType *DIBuilder::createQualifiedType(unsigned Tag, DIType *FromTy) { |
| return DIDerivedType::get(VMContext, Tag, "", nullptr, 0, nullptr, FromTy, 0, |
| 0, 0, None, DINode::FlagZero); |
| } |
| |
| DIDerivedType *DIBuilder::createPointerType( |
| DIType *PointeeTy, |
| uint64_t SizeInBits, |
| uint32_t AlignInBits, |
| Optional<unsigned> DWARFAddressSpace, |
| StringRef Name) { |
| // FIXME: Why is there a name here? |
| return DIDerivedType::get(VMContext, dwarf::DW_TAG_pointer_type, Name, |
| nullptr, 0, nullptr, PointeeTy, SizeInBits, |
| AlignInBits, 0, DWARFAddressSpace, |
| DINode::FlagZero); |
| } |
| |
| DIDerivedType *DIBuilder::createMemberPointerType(DIType *PointeeTy, |
| DIType *Base, |
| uint64_t SizeInBits, |
| uint32_t AlignInBits, |
| DINode::DIFlags Flags) { |
| return DIDerivedType::get(VMContext, dwarf::DW_TAG_ptr_to_member_type, "", |
| nullptr, 0, nullptr, PointeeTy, SizeInBits, |
| AlignInBits, 0, None, Flags, Base); |
| } |
| |
| DIDerivedType *DIBuilder::createReferenceType( |
| unsigned Tag, DIType *RTy, |
| uint64_t SizeInBits, |
| uint32_t AlignInBits, |
| Optional<unsigned> DWARFAddressSpace) { |
| assert(RTy && "Unable to create reference type"); |
| return DIDerivedType::get(VMContext, Tag, "", nullptr, 0, nullptr, RTy, |
| SizeInBits, AlignInBits, 0, DWARFAddressSpace, |
| DINode::FlagZero); |
| } |
| |
| DIDerivedType *DIBuilder::createTypedef(DIType *Ty, StringRef Name, |
| DIFile *File, unsigned LineNo, |
| DIScope *Context, |
| uint32_t AlignInBits) { |
| return DIDerivedType::get(VMContext, dwarf::DW_TAG_typedef, Name, File, |
| LineNo, getNonCompileUnitScope(Context), Ty, 0, |
| AlignInBits, 0, None, DINode::FlagZero); |
| } |
| |
| DIDerivedType *DIBuilder::createFriend(DIType *Ty, DIType *FriendTy) { |
| assert(Ty && "Invalid type!"); |
| assert(FriendTy && "Invalid friend type!"); |
| return DIDerivedType::get(VMContext, dwarf::DW_TAG_friend, "", nullptr, 0, Ty, |
| FriendTy, 0, 0, 0, None, DINode::FlagZero); |
| } |
| |
| DIDerivedType *DIBuilder::createInheritance(DIType *Ty, DIType *BaseTy, |
| uint64_t BaseOffset, |
| uint32_t VBPtrOffset, |
| DINode::DIFlags Flags) { |
| assert(Ty && "Unable to create inheritance"); |
| Metadata *ExtraData = ConstantAsMetadata::get( |
| ConstantInt::get(IntegerType::get(VMContext, 32), VBPtrOffset)); |
| return DIDerivedType::get(VMContext, dwarf::DW_TAG_inheritance, "", nullptr, |
| 0, Ty, BaseTy, 0, 0, BaseOffset, None, |
| Flags, ExtraData); |
| } |
| |
| DIDerivedType *DIBuilder::createMemberType(DIScope *Scope, StringRef Name, |
| DIFile *File, unsigned LineNumber, |
| uint64_t SizeInBits, |
| uint32_t AlignInBits, |
| uint64_t OffsetInBits, |
| DINode::DIFlags Flags, DIType *Ty) { |
| return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File, |
| LineNumber, getNonCompileUnitScope(Scope), Ty, |
| SizeInBits, AlignInBits, OffsetInBits, None, Flags); |
| } |
| |
| static ConstantAsMetadata *getConstantOrNull(Constant *C) { |
| if (C) |
| return ConstantAsMetadata::get(C); |
| return nullptr; |
| } |
| |
| DIDerivedType *DIBuilder::createVariantMemberType( |
| DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, |
| uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits, |
| Constant *Discriminant, DINode::DIFlags Flags, DIType *Ty) { |
| return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File, |
| LineNumber, getNonCompileUnitScope(Scope), Ty, |
| SizeInBits, AlignInBits, OffsetInBits, None, Flags, |
| getConstantOrNull(Discriminant)); |
| } |
| |
| DIDerivedType *DIBuilder::createBitFieldMemberType( |
| DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, |
| uint64_t SizeInBits, uint64_t OffsetInBits, uint64_t StorageOffsetInBits, |
| DINode::DIFlags Flags, DIType *Ty) { |
| Flags |= DINode::FlagBitField; |
| return DIDerivedType::get( |
| VMContext, dwarf::DW_TAG_member, Name, File, LineNumber, |
| getNonCompileUnitScope(Scope), Ty, SizeInBits, /* AlignInBits */ 0, |
| OffsetInBits, None, Flags, |
| ConstantAsMetadata::get(ConstantInt::get(IntegerType::get(VMContext, 64), |
| StorageOffsetInBits))); |
| } |
| |
| DIDerivedType * |
| DIBuilder::createStaticMemberType(DIScope *Scope, StringRef Name, DIFile *File, |
| unsigned LineNumber, DIType *Ty, |
| DINode::DIFlags Flags, llvm::Constant *Val, |
| uint32_t AlignInBits) { |
| Flags |= DINode::FlagStaticMember; |
| return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File, |
| LineNumber, getNonCompileUnitScope(Scope), Ty, 0, |
| AlignInBits, 0, None, Flags, |
| getConstantOrNull(Val)); |
| } |
| |
| DIDerivedType * |
| DIBuilder::createObjCIVar(StringRef Name, DIFile *File, unsigned LineNumber, |
| uint64_t SizeInBits, uint32_t AlignInBits, |
| uint64_t OffsetInBits, DINode::DIFlags Flags, |
| DIType *Ty, MDNode *PropertyNode) { |
| return DIDerivedType::get(VMContext, dwarf::DW_TAG_member, Name, File, |
| LineNumber, getNonCompileUnitScope(File), Ty, |
| SizeInBits, AlignInBits, OffsetInBits, None, Flags, |
| PropertyNode); |
| } |
| |
| DIObjCProperty * |
| DIBuilder::createObjCProperty(StringRef Name, DIFile *File, unsigned LineNumber, |
| StringRef GetterName, StringRef SetterName, |
| unsigned PropertyAttributes, DIType *Ty) { |
| return DIObjCProperty::get(VMContext, Name, File, LineNumber, GetterName, |
| SetterName, PropertyAttributes, Ty); |
| } |
| |
| DITemplateTypeParameter * |
| DIBuilder::createTemplateTypeParameter(DIScope *Context, StringRef Name, |
| DIType *Ty) { |
| assert((!Context || isa<DICompileUnit>(Context)) && "Expected compile unit"); |
| return DITemplateTypeParameter::get(VMContext, Name, Ty); |
| } |
| |
| static DITemplateValueParameter * |
| createTemplateValueParameterHelper(LLVMContext &VMContext, unsigned Tag, |
| DIScope *Context, StringRef Name, DIType *Ty, |
| Metadata *MD) { |
| assert((!Context || isa<DICompileUnit>(Context)) && "Expected compile unit"); |
| return DITemplateValueParameter::get(VMContext, Tag, Name, Ty, MD); |
| } |
| |
| DITemplateValueParameter * |
| DIBuilder::createTemplateValueParameter(DIScope *Context, StringRef Name, |
| DIType *Ty, Constant *Val) { |
| return createTemplateValueParameterHelper( |
| VMContext, dwarf::DW_TAG_template_value_parameter, Context, Name, Ty, |
| getConstantOrNull(Val)); |
| } |
| |
| DITemplateValueParameter * |
| DIBuilder::createTemplateTemplateParameter(DIScope *Context, StringRef Name, |
| DIType *Ty, StringRef Val) { |
| return createTemplateValueParameterHelper( |
| VMContext, dwarf::DW_TAG_GNU_template_template_param, Context, Name, Ty, |
| MDString::get(VMContext, Val)); |
| } |
| |
| DITemplateValueParameter * |
| DIBuilder::createTemplateParameterPack(DIScope *Context, StringRef Name, |
| DIType *Ty, DINodeArray Val) { |
| return createTemplateValueParameterHelper( |
| VMContext, dwarf::DW_TAG_GNU_template_parameter_pack, Context, Name, Ty, |
| Val.get()); |
| } |
| |
| DICompositeType *DIBuilder::createClassType( |
| DIScope *Context, StringRef Name, DIFile *File, unsigned LineNumber, |
| uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits, |
| DINode::DIFlags Flags, DIType *DerivedFrom, DINodeArray Elements, |
| DIType *VTableHolder, MDNode *TemplateParams, StringRef UniqueIdentifier) { |
| assert((!Context || isa<DIScope>(Context)) && |
| "createClassType should be called with a valid Context"); |
| |
| auto *R = DICompositeType::get( |
| VMContext, dwarf::DW_TAG_structure_type, Name, File, LineNumber, |
| getNonCompileUnitScope(Context), DerivedFrom, SizeInBits, AlignInBits, |
| OffsetInBits, Flags, Elements, 0, VTableHolder, |
| cast_or_null<MDTuple>(TemplateParams), UniqueIdentifier); |
| trackIfUnresolved(R); |
| return R; |
| } |
| |
| DICompositeType *DIBuilder::createStructType( |
| DIScope *Context, StringRef Name, DIFile *File, unsigned LineNumber, |
| uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags, |
| DIType *DerivedFrom, DINodeArray Elements, unsigned RunTimeLang, |
| DIType *VTableHolder, StringRef UniqueIdentifier) { |
| auto *R = DICompositeType::get( |
| VMContext, dwarf::DW_TAG_structure_type, Name, File, LineNumber, |
| getNonCompileUnitScope(Context), DerivedFrom, SizeInBits, AlignInBits, 0, |
| Flags, Elements, RunTimeLang, VTableHolder, nullptr, UniqueIdentifier); |
| trackIfUnresolved(R); |
| return R; |
| } |
| |
| DICompositeType *DIBuilder::createUnionType( |
| DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, |
| uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags, |
| DINodeArray Elements, unsigned RunTimeLang, StringRef UniqueIdentifier) { |
| auto *R = DICompositeType::get( |
| VMContext, dwarf::DW_TAG_union_type, Name, File, LineNumber, |
| getNonCompileUnitScope(Scope), nullptr, SizeInBits, AlignInBits, 0, Flags, |
| Elements, RunTimeLang, nullptr, nullptr, UniqueIdentifier); |
| trackIfUnresolved(R); |
| return R; |
| } |
| |
| DICompositeType *DIBuilder::createVariantPart( |
| DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, |
| uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags, |
| DIDerivedType *Discriminator, DINodeArray Elements, StringRef UniqueIdentifier) { |
| auto *R = DICompositeType::get( |
| VMContext, dwarf::DW_TAG_variant_part, Name, File, LineNumber, |
| getNonCompileUnitScope(Scope), nullptr, SizeInBits, AlignInBits, 0, Flags, |
| Elements, 0, nullptr, nullptr, UniqueIdentifier, Discriminator); |
| trackIfUnresolved(R); |
| return R; |
| } |
| |
| DISubroutineType *DIBuilder::createSubroutineType(DITypeRefArray ParameterTypes, |
| DINode::DIFlags Flags, |
| unsigned CC) { |
| return DISubroutineType::get(VMContext, Flags, CC, ParameterTypes); |
| } |
| |
| DICompositeType *DIBuilder::createEnumerationType( |
| DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, |
| uint64_t SizeInBits, uint32_t AlignInBits, DINodeArray Elements, |
| DIType *UnderlyingType, StringRef UniqueIdentifier, bool IsScoped) { |
| auto *CTy = DICompositeType::get( |
| VMContext, dwarf::DW_TAG_enumeration_type, Name, File, LineNumber, |
| getNonCompileUnitScope(Scope), UnderlyingType, SizeInBits, AlignInBits, 0, |
| IsScoped ? DINode::FlagEnumClass : DINode::FlagZero, Elements, 0, nullptr, |
| nullptr, UniqueIdentifier); |
| AllEnumTypes.push_back(CTy); |
| trackIfUnresolved(CTy); |
| return CTy; |
| } |
| |
| DICompositeType *DIBuilder::createArrayType(uint64_t Size, |
| uint32_t AlignInBits, DIType *Ty, |
| DINodeArray Subscripts) { |
| auto *R = DICompositeType::get(VMContext, dwarf::DW_TAG_array_type, "", |
| nullptr, 0, nullptr, Ty, Size, AlignInBits, 0, |
| DINode::FlagZero, Subscripts, 0, nullptr); |
| trackIfUnresolved(R); |
| return R; |
| } |
| |
| DICompositeType *DIBuilder::createVectorType(uint64_t Size, |
| uint32_t AlignInBits, DIType *Ty, |
| DINodeArray Subscripts) { |
| auto *R = DICompositeType::get(VMContext, dwarf::DW_TAG_array_type, "", |
| nullptr, 0, nullptr, Ty, Size, AlignInBits, 0, |
| DINode::FlagVector, Subscripts, 0, nullptr); |
| trackIfUnresolved(R); |
| return R; |
| } |
| |
| DISubprogram *DIBuilder::createArtificialSubprogram(DISubprogram *SP) { |
| auto NewSP = SP->cloneWithFlags(SP->getFlags() | DINode::FlagArtificial); |
| return MDNode::replaceWithDistinct(std::move(NewSP)); |
| } |
| |
| static DIType *createTypeWithFlags(const DIType *Ty, |
| DINode::DIFlags FlagsToSet) { |
| auto NewTy = Ty->cloneWithFlags(Ty->getFlags() | FlagsToSet); |
| return MDNode::replaceWithUniqued(std::move(NewTy)); |
| } |
| |
| DIType *DIBuilder::createArtificialType(DIType *Ty) { |
| // FIXME: Restrict this to the nodes where it's valid. |
| if (Ty->isArtificial()) |
| return Ty; |
| return createTypeWithFlags(Ty, DINode::FlagArtificial); |
| } |
| |
| DIType *DIBuilder::createObjectPointerType(DIType *Ty) { |
| // FIXME: Restrict this to the nodes where it's valid. |
| if (Ty->isObjectPointer()) |
| return Ty; |
| DINode::DIFlags Flags = DINode::FlagObjectPointer | DINode::FlagArtificial; |
| return createTypeWithFlags(Ty, Flags); |
| } |
| |
| void DIBuilder::retainType(DIScope *T) { |
| assert(T && "Expected non-null type"); |
| assert((isa<DIType>(T) || (isa<DISubprogram>(T) && |
| cast<DISubprogram>(T)->isDefinition() == false)) && |
| "Expected type or subprogram declaration"); |
| AllRetainTypes.emplace_back(T); |
| } |
| |
| DIBasicType *DIBuilder::createUnspecifiedParameter() { return nullptr; } |
| |
| DICompositeType * |
| DIBuilder::createForwardDecl(unsigned Tag, StringRef Name, DIScope *Scope, |
| DIFile *F, unsigned Line, unsigned RuntimeLang, |
| uint64_t SizeInBits, uint32_t AlignInBits, |
| StringRef UniqueIdentifier) { |
| // FIXME: Define in terms of createReplaceableForwardDecl() by calling |
| // replaceWithUniqued(). |
| auto *RetTy = DICompositeType::get( |
| VMContext, Tag, Name, F, Line, getNonCompileUnitScope(Scope), nullptr, |
| SizeInBits, AlignInBits, 0, DINode::FlagFwdDecl, nullptr, RuntimeLang, |
| nullptr, nullptr, UniqueIdentifier); |
| trackIfUnresolved(RetTy); |
| return RetTy; |
| } |
| |
| DICompositeType *DIBuilder::createReplaceableCompositeType( |
| unsigned Tag, StringRef Name, DIScope *Scope, DIFile *F, unsigned Line, |
| unsigned RuntimeLang, uint64_t SizeInBits, uint32_t AlignInBits, |
| DINode::DIFlags Flags, StringRef UniqueIdentifier) { |
| auto *RetTy = |
| DICompositeType::getTemporary( |
| VMContext, Tag, Name, F, Line, getNonCompileUnitScope(Scope), nullptr, |
| SizeInBits, AlignInBits, 0, Flags, nullptr, RuntimeLang, nullptr, |
| nullptr, UniqueIdentifier) |
| .release(); |
| trackIfUnresolved(RetTy); |
| return RetTy; |
| } |
| |
| DINodeArray DIBuilder::getOrCreateArray(ArrayRef<Metadata *> Elements) { |
| return MDTuple::get(VMContext, Elements); |
| } |
| |
| DIMacroNodeArray |
| DIBuilder::getOrCreateMacroArray(ArrayRef<Metadata *> Elements) { |
| return MDTuple::get(VMContext, Elements); |
| } |
| |
| DITypeRefArray DIBuilder::getOrCreateTypeArray(ArrayRef<Metadata *> Elements) { |
| SmallVector<llvm::Metadata *, 16> Elts; |
| for (unsigned i = 0, e = Elements.size(); i != e; ++i) { |
| if (Elements[i] && isa<MDNode>(Elements[i])) |
| Elts.push_back(cast<DIType>(Elements[i])); |
| else |
| Elts.push_back(Elements[i]); |
| } |
| return DITypeRefArray(MDNode::get(VMContext, Elts)); |
| } |
| |
| DISubrange *DIBuilder::getOrCreateSubrange(int64_t Lo, int64_t Count) { |
| return DISubrange::get(VMContext, Count, Lo); |
| } |
| |
| DISubrange *DIBuilder::getOrCreateSubrange(int64_t Lo, Metadata *CountNode) { |
| return DISubrange::get(VMContext, CountNode, Lo); |
| } |
| |
| static void checkGlobalVariableScope(DIScope *Context) { |
| #ifndef NDEBUG |
| if (auto *CT = |
| dyn_cast_or_null<DICompositeType>(getNonCompileUnitScope(Context))) |
| assert(CT->getIdentifier().empty() && |
| "Context of a global variable should not be a type with identifier"); |
| #endif |
| } |
| |
| DIGlobalVariableExpression *DIBuilder::createGlobalVariableExpression( |
| DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F, |
| unsigned LineNumber, DIType *Ty, bool IsLocalToUnit, |
| bool isDefined, DIExpression *Expr, |
| MDNode *Decl, MDTuple *TemplateParams, uint32_t AlignInBits) { |
| checkGlobalVariableScope(Context); |
| |
| auto *GV = DIGlobalVariable::getDistinct( |
| VMContext, cast_or_null<DIScope>(Context), Name, LinkageName, F, |
| LineNumber, Ty, IsLocalToUnit, isDefined, cast_or_null<DIDerivedType>(Decl), |
| TemplateParams, AlignInBits); |
| if (!Expr) |
| Expr = createExpression(); |
| auto *N = DIGlobalVariableExpression::get(VMContext, GV, Expr); |
| AllGVs.push_back(N); |
| return N; |
| } |
| |
| DIGlobalVariable *DIBuilder::createTempGlobalVariableFwdDecl( |
| DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F, |
| unsigned LineNumber, DIType *Ty, bool IsLocalToUnit, MDNode *Decl, |
| MDTuple *TemplateParams, uint32_t AlignInBits) { |
| checkGlobalVariableScope(Context); |
| |
| return DIGlobalVariable::getTemporary( |
| VMContext, cast_or_null<DIScope>(Context), Name, LinkageName, F, |
| LineNumber, Ty, IsLocalToUnit, false, |
| cast_or_null<DIDerivedType>(Decl), TemplateParams, AlignInBits) |
| .release(); |
| } |
| |
| static DILocalVariable *createLocalVariable( |
| LLVMContext &VMContext, |
| DenseMap<MDNode *, SmallVector<TrackingMDNodeRef, 1>> &PreservedVariables, |
| DIScope *Scope, StringRef Name, unsigned ArgNo, DIFile *File, |
| unsigned LineNo, DIType *Ty, bool AlwaysPreserve, DINode::DIFlags Flags, |
| uint32_t AlignInBits) { |
| // FIXME: Why getNonCompileUnitScope()? |
| // FIXME: Why is "!Context" okay here? |
| // FIXME: Why doesn't this check for a subprogram or lexical block (AFAICT |
| // the only valid scopes)? |
| DIScope *Context = getNonCompileUnitScope(Scope); |
| |
| auto *Node = |
| DILocalVariable::get(VMContext, cast_or_null<DILocalScope>(Context), Name, |
| File, LineNo, Ty, ArgNo, Flags, AlignInBits); |
| if (AlwaysPreserve) { |
| // The optimizer may remove local variables. If there is an interest |
| // to preserve variable info in such situation then stash it in a |
| // named mdnode. |
| DISubprogram *Fn = getDISubprogram(Scope); |
| assert(Fn && "Missing subprogram for local variable"); |
| PreservedVariables[Fn].emplace_back(Node); |
| } |
| return Node; |
| } |
| |
| DILocalVariable *DIBuilder::createAutoVariable(DIScope *Scope, StringRef Name, |
| DIFile *File, unsigned LineNo, |
| DIType *Ty, bool AlwaysPreserve, |
| DINode::DIFlags Flags, |
| uint32_t AlignInBits) { |
| return createLocalVariable(VMContext, PreservedVariables, Scope, Name, |
| /* ArgNo */ 0, File, LineNo, Ty, AlwaysPreserve, |
| Flags, AlignInBits); |
| } |
| |
| DILocalVariable *DIBuilder::createParameterVariable( |
| DIScope *Scope, StringRef Name, unsigned ArgNo, DIFile *File, |
| unsigned LineNo, DIType *Ty, bool AlwaysPreserve, DINode::DIFlags Flags) { |
| assert(ArgNo && "Expected non-zero argument number for parameter"); |
| return createLocalVariable(VMContext, PreservedVariables, Scope, Name, ArgNo, |
| File, LineNo, Ty, AlwaysPreserve, Flags, |
| /* AlignInBits */0); |
| } |
| |
| DILabel *DIBuilder::createLabel( |
| DIScope *Scope, StringRef Name, DIFile *File, |
| unsigned LineNo, bool AlwaysPreserve) { |
| DIScope *Context = getNonCompileUnitScope(Scope); |
| |
| auto *Node = |
| DILabel::get(VMContext, cast_or_null<DILocalScope>(Context), Name, |
| File, LineNo); |
| |
| if (AlwaysPreserve) { |
| /// The optimizer may remove labels. If there is an interest |
| /// to preserve label info in such situation then append it to |
| /// the list of retained nodes of the DISubprogram. |
| DISubprogram *Fn = getDISubprogram(Scope); |
| assert(Fn && "Missing subprogram for label"); |
| PreservedLabels[Fn].emplace_back(Node); |
| } |
| return Node; |
| } |
| |
| DIExpression *DIBuilder::createExpression(ArrayRef<uint64_t> Addr) { |
| return DIExpression::get(VMContext, Addr); |
| } |
| |
| DIExpression *DIBuilder::createExpression(ArrayRef<int64_t> Signed) { |
| // TODO: Remove the callers of this signed version and delete. |
| SmallVector<uint64_t, 8> Addr(Signed.begin(), Signed.end()); |
| return createExpression(Addr); |
| } |
| |
| template <class... Ts> |
| static DISubprogram *getSubprogram(bool IsDistinct, Ts &&... Args) { |
| if (IsDistinct) |
| return DISubprogram::getDistinct(std::forward<Ts>(Args)...); |
| return DISubprogram::get(std::forward<Ts>(Args)...); |
| } |
| |
| DISubprogram *DIBuilder::createFunction( |
| DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *File, |
| unsigned LineNo, DISubroutineType *Ty, unsigned ScopeLine, |
| DINode::DIFlags Flags, DISubprogram::DISPFlags SPFlags, |
| DITemplateParameterArray TParams, DISubprogram *Decl, |
| DITypeArray ThrownTypes) { |
| bool IsDefinition = SPFlags & DISubprogram::SPFlagDefinition; |
| auto *Node = getSubprogram( |
| /*IsDistinct=*/IsDefinition, VMContext, getNonCompileUnitScope(Context), |
| Name, LinkageName, File, LineNo, Ty, ScopeLine, nullptr, 0, 0, Flags, |
| SPFlags, IsDefinition ? CUNode : nullptr, TParams, Decl, |
| MDTuple::getTemporary(VMContext, None).release(), ThrownTypes); |
| |
| if (IsDefinition) |
| AllSubprograms.push_back(Node); |
| trackIfUnresolved(Node); |
| return Node; |
| } |
| |
| DISubprogram *DIBuilder::createTempFunctionFwdDecl( |
| DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *File, |
| unsigned LineNo, DISubroutineType *Ty, unsigned ScopeLine, |
| DINode::DIFlags Flags, DISubprogram::DISPFlags SPFlags, |
| DITemplateParameterArray TParams, DISubprogram *Decl, |
| DITypeArray ThrownTypes) { |
| bool IsDefinition = SPFlags & DISubprogram::SPFlagDefinition; |
| return DISubprogram::getTemporary(VMContext, getNonCompileUnitScope(Context), |
| Name, LinkageName, File, LineNo, Ty, |
| ScopeLine, nullptr, 0, 0, Flags, SPFlags, |
| IsDefinition ? CUNode : nullptr, TParams, |
| Decl, nullptr, ThrownTypes) |
| .release(); |
| } |
| |
| DISubprogram *DIBuilder::createMethod( |
| DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *F, |
| unsigned LineNo, DISubroutineType *Ty, unsigned VIndex, int ThisAdjustment, |
| DIType *VTableHolder, DINode::DIFlags Flags, |
| DISubprogram::DISPFlags SPFlags, DITemplateParameterArray TParams, |
| DITypeArray ThrownTypes) { |
| assert(getNonCompileUnitScope(Context) && |
| "Methods should have both a Context and a context that isn't " |
| "the compile unit."); |
| // FIXME: Do we want to use different scope/lines? |
| bool IsDefinition = SPFlags & DISubprogram::SPFlagDefinition; |
| auto *SP = getSubprogram( |
| /*IsDistinct=*/IsDefinition, VMContext, cast<DIScope>(Context), Name, |
| LinkageName, F, LineNo, Ty, LineNo, VTableHolder, VIndex, ThisAdjustment, |
| Flags, SPFlags, IsDefinition ? CUNode : nullptr, TParams, nullptr, |
| nullptr, ThrownTypes); |
| |
| if (IsDefinition) |
| AllSubprograms.push_back(SP); |
| trackIfUnresolved(SP); |
| return SP; |
| } |
| |
| DICommonBlock *DIBuilder::createCommonBlock( |
| DIScope *Scope, DIGlobalVariable *Decl, StringRef Name, DIFile *File, |
| unsigned LineNo) { |
| return DICommonBlock::get( |
| VMContext, Scope, Decl, Name, File, LineNo); |
| } |
| |
| DINamespace *DIBuilder::createNameSpace(DIScope *Scope, StringRef Name, |
| bool ExportSymbols) { |
| |
| // It is okay to *not* make anonymous top-level namespaces distinct, because |
| // all nodes that have an anonymous namespace as their parent scope are |
| // guaranteed to be unique and/or are linked to their containing |
| // DICompileUnit. This decision is an explicit tradeoff of link time versus |
| // memory usage versus code simplicity and may get revisited in the future. |
| return DINamespace::get(VMContext, getNonCompileUnitScope(Scope), Name, |
| ExportSymbols); |
| } |
| |
| DIModule *DIBuilder::createModule(DIScope *Scope, StringRef Name, |
| StringRef ConfigurationMacros, |
| StringRef IncludePath, |
| StringRef SysRoot) { |
| return DIModule::get(VMContext, getNonCompileUnitScope(Scope), Name, |
| ConfigurationMacros, IncludePath, SysRoot); |
| } |
| |
| DILexicalBlockFile *DIBuilder::createLexicalBlockFile(DIScope *Scope, |
| DIFile *File, |
| unsigned Discriminator) { |
| return DILexicalBlockFile::get(VMContext, Scope, File, Discriminator); |
| } |
| |
| DILexicalBlock *DIBuilder::createLexicalBlock(DIScope *Scope, DIFile *File, |
| unsigned Line, unsigned Col) { |
| // Make these distinct, to avoid merging two lexical blocks on the same |
| // file/line/column. |
| return DILexicalBlock::getDistinct(VMContext, getNonCompileUnitScope(Scope), |
| File, Line, Col); |
| } |
| |
| Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo, |
| DIExpression *Expr, const DILocation *DL, |
| Instruction *InsertBefore) { |
| return insertDeclare(Storage, VarInfo, Expr, DL, InsertBefore->getParent(), |
| InsertBefore); |
| } |
| |
| Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo, |
| DIExpression *Expr, const DILocation *DL, |
| BasicBlock *InsertAtEnd) { |
| // If this block already has a terminator then insert this intrinsic before |
| // the terminator. Otherwise, put it at the end of the block. |
| Instruction *InsertBefore = InsertAtEnd->getTerminator(); |
| return insertDeclare(Storage, VarInfo, Expr, DL, InsertAtEnd, InsertBefore); |
| } |
| |
| Instruction *DIBuilder::insertLabel(DILabel *LabelInfo, const DILocation *DL, |
| Instruction *InsertBefore) { |
| return insertLabel( |
| LabelInfo, DL, InsertBefore ? InsertBefore->getParent() : nullptr, |
| InsertBefore); |
| } |
| |
| Instruction *DIBuilder::insertLabel(DILabel *LabelInfo, const DILocation *DL, |
| BasicBlock *InsertAtEnd) { |
| return insertLabel(LabelInfo, DL, InsertAtEnd, nullptr); |
| } |
| |
| Instruction *DIBuilder::insertDbgValueIntrinsic(Value *V, |
| DILocalVariable *VarInfo, |
| DIExpression *Expr, |
| const DILocation *DL, |
| Instruction *InsertBefore) { |
| return insertDbgValueIntrinsic( |
| V, VarInfo, Expr, DL, InsertBefore ? InsertBefore->getParent() : nullptr, |
| InsertBefore); |
| } |
| |
| Instruction *DIBuilder::insertDbgValueIntrinsic(Value *V, |
| DILocalVariable *VarInfo, |
| DIExpression *Expr, |
| const DILocation *DL, |
| BasicBlock *InsertAtEnd) { |
| return insertDbgValueIntrinsic(V, VarInfo, Expr, DL, InsertAtEnd, nullptr); |
| } |
| |
| /// Return an IRBuilder for inserting dbg.declare and dbg.value intrinsics. This |
| /// abstracts over the various ways to specify an insert position. |
| static IRBuilder<> getIRBForDbgInsertion(const DILocation *DL, |
| BasicBlock *InsertBB, |
| Instruction *InsertBefore) { |
| IRBuilder<> B(DL->getContext()); |
| if (InsertBefore) |
| B.SetInsertPoint(InsertBefore); |
| else if (InsertBB) |
| B.SetInsertPoint(InsertBB); |
| B.SetCurrentDebugLocation(DL); |
| return B; |
| } |
| |
| static Value *getDbgIntrinsicValueImpl(LLVMContext &VMContext, Value *V) { |
| assert(V && "no value passed to dbg intrinsic"); |
| return MetadataAsValue::get(VMContext, ValueAsMetadata::get(V)); |
| } |
| |
| static Function *getDeclareIntrin(Module &M) { |
| return Intrinsic::getDeclaration(&M, UseDbgAddr ? Intrinsic::dbg_addr |
| : Intrinsic::dbg_declare); |
| } |
| |
| Instruction *DIBuilder::insertDeclare(Value *Storage, DILocalVariable *VarInfo, |
| DIExpression *Expr, const DILocation *DL, |
| BasicBlock *InsertBB, Instruction *InsertBefore) { |
| assert(VarInfo && "empty or invalid DILocalVariable* passed to dbg.declare"); |
| assert(DL && "Expected debug loc"); |
| assert(DL->getScope()->getSubprogram() == |
| VarInfo->getScope()->getSubprogram() && |
| "Expected matching subprograms"); |
| if (!DeclareFn) |
| DeclareFn = getDeclareIntrin(M); |
| |
| trackIfUnresolved(VarInfo); |
| trackIfUnresolved(Expr); |
| Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, Storage), |
| MetadataAsValue::get(VMContext, VarInfo), |
| MetadataAsValue::get(VMContext, Expr)}; |
| |
| IRBuilder<> B = getIRBForDbgInsertion(DL, InsertBB, InsertBefore); |
| return B.CreateCall(DeclareFn, Args); |
| } |
| |
| Instruction *DIBuilder::insertDbgValueIntrinsic( |
| Value *V, DILocalVariable *VarInfo, DIExpression *Expr, |
| const DILocation *DL, BasicBlock *InsertBB, Instruction *InsertBefore) { |
| assert(V && "no value passed to dbg.value"); |
| assert(VarInfo && "empty or invalid DILocalVariable* passed to dbg.value"); |
| assert(DL && "Expected debug loc"); |
| assert(DL->getScope()->getSubprogram() == |
| VarInfo->getScope()->getSubprogram() && |
| "Expected matching subprograms"); |
| if (!ValueFn) |
| ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value); |
| |
| trackIfUnresolved(VarInfo); |
| trackIfUnresolved(Expr); |
| Value *Args[] = {getDbgIntrinsicValueImpl(VMContext, V), |
| MetadataAsValue::get(VMContext, VarInfo), |
| MetadataAsValue::get(VMContext, Expr)}; |
| |
| IRBuilder<> B = getIRBForDbgInsertion(DL, InsertBB, InsertBefore); |
| return B.CreateCall(ValueFn, Args); |
| } |
| |
| Instruction *DIBuilder::insertLabel( |
| DILabel *LabelInfo, const DILocation *DL, |
| BasicBlock *InsertBB, Instruction *InsertBefore) { |
| assert(LabelInfo && "empty or invalid DILabel* passed to dbg.label"); |
| assert(DL && "Expected debug loc"); |
| assert(DL->getScope()->getSubprogram() == |
| LabelInfo->getScope()->getSubprogram() && |
| "Expected matching subprograms"); |
| if (!LabelFn) |
| LabelFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_label); |
| |
| trackIfUnresolved(LabelInfo); |
| Value *Args[] = {MetadataAsValue::get(VMContext, LabelInfo)}; |
| |
| IRBuilder<> B = getIRBForDbgInsertion(DL, InsertBB, InsertBefore); |
| return B.CreateCall(LabelFn, Args); |
| } |
| |
| void DIBuilder::replaceVTableHolder(DICompositeType *&T, |
| DIType *VTableHolder) { |
| { |
| TypedTrackingMDRef<DICompositeType> N(T); |
| N->replaceVTableHolder(VTableHolder); |
| T = N.get(); |
| } |
| |
| // If this didn't create a self-reference, just return. |
| if (T != VTableHolder) |
| return; |
| |
| // Look for unresolved operands. T will drop RAUW support, orphaning any |
| // cycles underneath it. |
| if (T->isResolved()) |
| for (const MDOperand &O : T->operands()) |
| if (auto *N = dyn_cast_or_null<MDNode>(O)) |
| trackIfUnresolved(N); |
| } |
| |
| void DIBuilder::replaceArrays(DICompositeType *&T, DINodeArray Elements, |
| DINodeArray TParams) { |
| { |
| TypedTrackingMDRef<DICompositeType> N(T); |
| if (Elements) |
| N->replaceElements(Elements); |
| if (TParams) |
| N->replaceTemplateParams(DITemplateParameterArray(TParams)); |
| T = N.get(); |
| } |
| |
| // If T isn't resolved, there's no problem. |
| if (!T->isResolved()) |
| return; |
| |
| // If T is resolved, it may be due to a self-reference cycle. Track the |
| // arrays explicitly if they're unresolved, or else the cycles will be |
| // orphaned. |
| if (Elements) |
| trackIfUnresolved(Elements.get()); |
| if (TParams) |
| trackIfUnresolved(TParams.get()); |
| } |
