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-rw-r--r--clang/lib/AST/ODRHash.cpp935
1 files changed, 935 insertions, 0 deletions
diff --git a/clang/lib/AST/ODRHash.cpp b/clang/lib/AST/ODRHash.cpp
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index 00000000000..7ad76df8a77
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+++ b/clang/lib/AST/ODRHash.cpp
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+//===-- ODRHash.cpp - Hashing to diagnose ODR failures ----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file implements the ODRHash class, which calculates a hash based
+/// on AST nodes, which is stable across different runs.
+///
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/ODRHash.h"
+
+#include "clang/AST/DeclVisitor.h"
+#include "clang/AST/NestedNameSpecifier.h"
+#include "clang/AST/StmtVisitor.h"
+#include "clang/AST/TypeVisitor.h"
+
+using namespace clang;
+
+
+// Hashing for Stmt is with Stmt::Profile, since they derive from the same base
+// class.
+void ODRHash::AddStmt(const Stmt *S) {
+ assert(S && "Expecting non-null pointer.");
+ S->ProcessODRHash(ID, *this);
+}
+
+void ODRHash::AddIdentifierInfo(const IdentifierInfo *II) {
+ assert(II && "Expecting non-null pointer.");
+ ID.AddString(II->getName());
+}
+
+void ODRHash::AddNestedNameSpecifier(const NestedNameSpecifier *NNS) {
+ assert(NNS && "Expecting non-null pointer.");
+ const auto *Prefix = NNS->getPrefix();
+ AddBoolean(Prefix);
+ if (Prefix)
+ AddNestedNameSpecifier(Prefix);
+
+ auto Kind = NNS->getKind();
+ ID.AddInteger(Kind);
+ switch (Kind) {
+ case NestedNameSpecifier::Identifier:
+ AddIdentifierInfo(NNS->getAsIdentifier());
+ break;
+ case NestedNameSpecifier::Namespace:
+ AddDecl(NNS->getAsNamespace());
+ break;
+ case NestedNameSpecifier::NamespaceAlias:
+ AddDecl(NNS->getAsNamespaceAlias());
+ break;
+ case NestedNameSpecifier::TypeSpec:
+ case NestedNameSpecifier::TypeSpecWithTemplate:
+ AddType(NNS->getAsType());
+ break;
+ case NestedNameSpecifier::Global:
+ case NestedNameSpecifier::Super:
+ break;
+ }
+}
+
+void ODRHash::AddTemplateName(TemplateName Name) {
+ const auto Kind = Name.getKind();
+ ID.AddInteger(Kind);
+ AddBoolean(Name.isDependent());
+ AddBoolean(Name.isInstantiationDependent());
+ switch (Kind) {
+ case TemplateName::Template:
+ AddDecl(Name.getAsTemplateDecl());
+ break;
+ case TemplateName::OverloadedTemplate: {
+ const auto *Storage = Name.getAsOverloadedTemplate();
+ ID.AddInteger(Storage->size());
+ for (const auto *ND : *Storage) {
+ AddDecl(ND);
+ }
+ break;
+ }
+ case TemplateName::QualifiedTemplate: {
+ const auto *QTN = Name.getAsQualifiedTemplateName();
+ AddNestedNameSpecifier(QTN->getQualifier());
+ AddBoolean(QTN->hasTemplateKeyword());
+ AddDecl(QTN->getDecl());
+ break;
+ }
+ case TemplateName::DependentTemplate: {
+ const auto *DTN = Name.getAsDependentTemplateName();
+ AddBoolean(DTN->isIdentifier());
+ if (DTN->isIdentifier()) {
+ AddIdentifierInfo(DTN->getIdentifier());
+ } else {
+ ID.AddInteger(DTN->getOperator());
+ }
+ break;
+ }
+ case TemplateName::SubstTemplateTemplateParm: {
+ const auto *Storage = Name.getAsSubstTemplateTemplateParm();
+ AddDecl(Storage->getParameter());
+ AddTemplateName(Storage->getReplacement());
+ break;
+ }
+ case TemplateName::SubstTemplateTemplateParmPack: {
+ const auto *Storage = Name.getAsSubstTemplateTemplateParmPack();
+ AddDecl(Storage->getParameterPack());
+ AddTemplateArgument(Storage->getArgumentPack());
+ break;
+ }
+ }
+}
+
+void ODRHash::AddDeclarationName(DeclarationName Name) {
+ AddBoolean(Name.isEmpty());
+ if (Name.isEmpty())
+ return;
+
+ auto Kind = Name.getNameKind();
+ ID.AddInteger(Kind);
+ switch (Kind) {
+ case DeclarationName::Identifier:
+ AddIdentifierInfo(Name.getAsIdentifierInfo());
+ break;
+ case DeclarationName::ObjCZeroArgSelector:
+ case DeclarationName::ObjCOneArgSelector:
+ case DeclarationName::ObjCMultiArgSelector: {
+ Selector S = Name.getObjCSelector();
+ AddBoolean(S.isNull());
+ AddBoolean(S.isKeywordSelector());
+ AddBoolean(S.isUnarySelector());
+ unsigned NumArgs = S.getNumArgs();
+ for (unsigned i = 0; i < NumArgs; ++i) {
+ AddIdentifierInfo(S.getIdentifierInfoForSlot(i));
+ }
+ break;
+ }
+ case DeclarationName::CXXConstructorName:
+ case DeclarationName::CXXDestructorName:
+ AddQualType(Name.getCXXNameType());
+ break;
+ case DeclarationName::CXXOperatorName:
+ ID.AddInteger(Name.getCXXOverloadedOperator());
+ break;
+ case DeclarationName::CXXLiteralOperatorName:
+ AddIdentifierInfo(Name.getCXXLiteralIdentifier());
+ break;
+ case DeclarationName::CXXConversionFunctionName:
+ AddQualType(Name.getCXXNameType());
+ break;
+ case DeclarationName::CXXUsingDirective:
+ break;
+ case DeclarationName::CXXDeductionGuideName: {
+ auto *Template = Name.getCXXDeductionGuideTemplate();
+ AddBoolean(Template);
+ if (Template) {
+ AddDecl(Template);
+ }
+ }
+ }
+}
+
+void ODRHash::AddTemplateArgument(TemplateArgument TA) {
+ const auto Kind = TA.getKind();
+ ID.AddInteger(Kind);
+ switch (Kind) {
+ case TemplateArgument::Null:
+ llvm_unreachable("Require valid TemplateArgument");
+ case TemplateArgument::Type:
+ AddQualType(TA.getAsType());
+ break;
+ case TemplateArgument::Declaration:
+ AddDecl(TA.getAsDecl());
+ break;
+ case TemplateArgument::NullPtr:
+ AddQualType(TA.getNullPtrType());
+ break;
+ case TemplateArgument::Integral:
+ TA.getAsIntegral().Profile(ID);
+ AddQualType(TA.getIntegralType());
+ break;
+ case TemplateArgument::Template:
+ case TemplateArgument::TemplateExpansion:
+ AddTemplateName(TA.getAsTemplateOrTemplatePattern());
+ break;
+ case TemplateArgument::Expression:
+ AddStmt(TA.getAsExpr());
+ break;
+ case TemplateArgument::Pack:
+ ID.AddInteger(TA.pack_size());
+ for (auto SubTA : TA.pack_elements())
+ AddTemplateArgument(SubTA);
+ break;
+ }
+}
+
+void ODRHash::AddTemplateParameterList(const TemplateParameterList *TPL) {
+ assert(TPL && "Expecting non-null pointer.");
+ ID.AddInteger(TPL->size());
+ for (auto *ND : TPL->asArray()) {
+ AddSubDecl(ND);
+ }
+}
+
+void ODRHash::clear() {
+ DeclMap.clear();
+ TypeMap.clear();
+ Bools.clear();
+ ID.clear();
+}
+
+unsigned ODRHash::CalculateHash() {
+ // Append the bools to the end of the data segment backwards. This allows
+ // for the bools data to be compressed 32 times smaller compared to using
+ // ID.AddBoolean
+ const unsigned unsigned_bits = sizeof(unsigned) * CHAR_BIT;
+ const unsigned size = Bools.size();
+ const unsigned remainder = size % unsigned_bits;
+ const unsigned loops = size / unsigned_bits;
+ auto I = Bools.rbegin();
+ unsigned value = 0;
+ for (unsigned i = 0; i < remainder; ++i) {
+ value <<= 1;
+ value |= *I;
+ ++I;
+ }
+ ID.AddInteger(value);
+
+ for (unsigned i = 0; i < loops; ++i) {
+ value = 0;
+ for (unsigned j = 0; j < unsigned_bits; ++j) {
+ value <<= 1;
+ value |= *I;
+ ++I;
+ }
+ ID.AddInteger(value);
+ }
+
+ assert(I == Bools.rend());
+ Bools.clear();
+ return ID.ComputeHash();
+}
+
+// Process a Decl pointer. Add* methods call back into ODRHash while Visit*
+// methods process the relevant parts of the Decl.
+class ODRDeclVisitor : public ConstDeclVisitor<ODRDeclVisitor> {
+ typedef ConstDeclVisitor<ODRDeclVisitor> Inherited;
+ llvm::FoldingSetNodeID &ID;
+ ODRHash &Hash;
+
+public:
+ ODRDeclVisitor(llvm::FoldingSetNodeID &ID, ODRHash &Hash)
+ : ID(ID), Hash(Hash) {}
+
+ void AddDecl(const Decl *D) {
+ Hash.AddBoolean(D);
+ if (D) {
+ Hash.AddDecl(D);
+ }
+ }
+
+ void AddStmt(const Stmt *S) {
+ Hash.AddBoolean(S);
+ if (S) {
+ Hash.AddStmt(S);
+ }
+ }
+
+ void AddQualType(QualType T) {
+ Hash.AddQualType(T);
+ }
+
+ void AddIdentifierInfo(const IdentifierInfo *II) {
+ Hash.AddBoolean(II);
+ if (II) {
+ Hash.AddIdentifierInfo(II);
+ }
+ }
+
+ void AddTemplateParameterList(TemplateParameterList *TPL) {
+ Hash.AddBoolean(TPL);
+ if (TPL) {
+ Hash.AddTemplateParameterList(TPL);
+ }
+ }
+
+ void AddTemplateArgument(TemplateArgument TA) {
+ Hash.AddTemplateArgument(TA);
+ }
+
+ void Visit(const Decl *D) {
+ if (!D)
+ return;
+ if (D->isImplicit())
+ return;
+ if (D->isInvalidDecl())
+ return;
+ ID.AddInteger(D->getKind());
+
+ Inherited::Visit(D);
+ }
+
+ void VisitDecl(const Decl *D) {
+ Inherited::VisitDecl(D);
+ }
+
+ void VisitLabelDecl(const LabelDecl *D) {
+ Inherited::VisitLabelDecl(D);
+ }
+
+ void VisitEnumDecl(const EnumDecl *D) {
+ const bool isFixed = D->isFixed();
+ Hash.AddBoolean(isFixed);
+ if (isFixed)
+ AddQualType(D->getIntegerType());
+ Hash.AddBoolean(D->isScoped());
+ Hash.AddBoolean(D->isScopedUsingClassTag());
+
+ // TODO: Enums should have their own ODR hash.
+ for (auto *SubDecl : D->decls()) {
+ Hash.AddSubDecl(SubDecl);
+ }
+
+ Inherited::VisitEnumDecl(D);
+ }
+
+ void VisitEnumConstantDecl(const EnumConstantDecl *D) {
+ auto *E = D->getInitExpr();
+ AddStmt(E);
+
+ Inherited::VisitEnumConstantDecl(D);
+ }
+
+ void VisitNamedDecl(const NamedDecl *D) {
+ AddIdentifierInfo(D->getIdentifier());
+ Inherited::VisitNamedDecl(D);
+ }
+
+ void VisitValueDecl(const ValueDecl *D) {
+ AddQualType(D->getType());
+ Inherited::VisitValueDecl(D);
+ }
+
+ void VisitParmVarDecl(const ParmVarDecl *D) {
+ AddStmt(D->getDefaultArg());
+ Inherited::VisitParmVarDecl(D);
+ }
+
+ void VisitAccessSpecDecl(const AccessSpecDecl *D) {
+ ID.AddInteger(D->getAccess());
+ Inherited::VisitAccessSpecDecl(D);
+ }
+
+ void VisitFriendDecl(const FriendDecl *D) {
+ TypeSourceInfo *TSI = D->getFriendType();
+ Hash.AddBoolean(TSI);
+ if (TSI)
+ AddQualType(TSI->getType());
+ else
+ AddDecl(D->getFriendDecl());
+
+ unsigned NumLists = D->getFriendTypeNumTemplateParameterLists();
+ ID.AddInteger(NumLists);
+ for (unsigned i = 0; i < NumLists; ++i)
+ AddTemplateParameterList(D->getFriendTypeTemplateParameterList(i));
+ Inherited::VisitFriendDecl(D);
+ }
+
+ void VisitStaticAssertDecl(const StaticAssertDecl *D) {
+ AddStmt(D->getAssertExpr());
+ AddStmt(D->getMessage());
+
+ Inherited::VisitStaticAssertDecl(D);
+ }
+
+ void VisitTypedefNameDecl(const TypedefNameDecl *D) {
+ AddQualType(D->getUnderlyingType());
+
+ Inherited::VisitTypedefNameDecl(D);
+ }
+
+ void VisitFunctionDecl(const FunctionDecl *D) {
+ // TODO: Functions should have their own ODR hashes.
+ AddStmt(D->hasBody() ? D->getBody() : nullptr);
+
+ ID.AddInteger(D->getStorageClass());
+ Hash.AddBoolean(D->isInlineSpecified());
+ Hash.AddBoolean(D->isVirtualAsWritten());
+ Hash.AddBoolean(D->isPure());
+ Hash.AddBoolean(D->isDeletedAsWritten());
+ ID.AddInteger(D->getOverloadedOperator());
+ Inherited::VisitFunctionDecl(D);
+ }
+
+ void VisitCXXMethodDecl(const CXXMethodDecl *D) {
+ Hash.AddBoolean(D->isStatic());
+ Hash.AddBoolean(D->isInstance());
+ Hash.AddBoolean(D->isConst());
+ Hash.AddBoolean(D->isVolatile());
+ Inherited::VisitCXXMethodDecl(D);
+ }
+
+ void VisitCXXConstructorDecl(const CXXConstructorDecl *D) {
+ Hash.AddBoolean(D->isExplicitSpecified());
+ unsigned NumCtorInits = 0;
+ llvm::SmallVector<CXXCtorInitializer *, 4> Initializers;
+ ID.AddInteger(D->getNumCtorInitializers());
+ for (auto Initializer : D->inits()) {
+ if (Initializer->isWritten()) {
+ ++NumCtorInits;
+ Initializers.push_back(Initializer);
+ }
+ }
+ for (auto Initializer : Initializers) {
+ AddStmt(Initializer->getInit());
+ }
+
+ Inherited::VisitCXXConstructorDecl(D);
+ }
+
+ void VisitCXXConversionDecl(const CXXConversionDecl *D) {
+ AddQualType(D->getConversionType());
+ Hash.AddBoolean(D->isExplicitSpecified());
+ Inherited::VisitCXXConversionDecl(D);
+ }
+
+ void VisitFieldDecl(const FieldDecl *D) {
+ Hash.AddBoolean(D->isMutable());
+
+ const bool isBitField = D->isBitField();
+ Hash.AddBoolean(isBitField);
+ if (isBitField)
+ AddStmt(D->getBitWidth());
+
+ AddStmt(D->getInClassInitializer());
+
+ Inherited::VisitFieldDecl(D);
+ }
+
+ void VisitTemplateDecl(const TemplateDecl *D) {
+ AddDecl(D->getTemplatedDecl());
+
+ auto *Parameters = D->getTemplateParameters();
+ ID.AddInteger(Parameters->size());
+ for (auto *ND : *Parameters)
+ AddDecl(ND);
+
+ Inherited::VisitTemplateDecl(D);
+ }
+
+ void VisitFunctionTemplateDecl(const FunctionTemplateDecl *D) {
+ Inherited::VisitFunctionTemplateDecl(D);
+ }
+
+ void VisitTemplateTypeParmDecl(const TemplateTypeParmDecl *D) {
+ const bool hasDefaultArgument = D->hasDefaultArgument();
+ Hash.AddBoolean(hasDefaultArgument);
+ if (hasDefaultArgument)
+ AddTemplateArgument(D->getDefaultArgument());
+
+ Inherited::VisitTemplateTypeParmDecl(D);
+ }
+
+ void VisitNonTypeTemplateParmDecl(const NonTypeTemplateParmDecl *D) {
+ AddStmt(D->hasDefaultArgument() ? D->getDefaultArgument() : nullptr);
+
+ Inherited::VisitNonTypeTemplateParmDecl(D);
+ }
+
+ void VisitTemplateTemplateParmDecl(const TemplateTemplateParmDecl *D) {
+ const bool hasDefaultArgument = D->hasDefaultArgument();
+ Hash.AddBoolean(hasDefaultArgument);
+ if (hasDefaultArgument)
+ AddTemplateArgument(D->getDefaultArgument().getArgument());
+
+ Inherited::VisitTemplateTemplateParmDecl(D);
+ }
+
+ void VisitCXXRecordDecl(const CXXRecordDecl *D) {
+ const bool hasDefinition = D->hasDefinition();
+ Hash.AddBoolean(hasDefinition);
+ if (hasDefinition) {
+ ID.AddInteger(D->getODRHash());
+ }
+ Inherited::VisitCXXRecordDecl(D);
+ }
+};
+
+
+void ODRHash::AddSubDecl(const Decl *D) {
+ assert(D && "Expecting non-null pointer.");
+ AddDecl(D);
+ ODRDeclVisitor(ID, *this).Visit(D);
+}
+
+void ODRHash::AddCXXRecordDecl(const CXXRecordDecl *Record) {
+ assert(Record && Record->hasDefinition() &&
+ "Expected non-null record to be a definition.");
+ AddDecl(Record);
+
+ // Filter out sub-Decls which will not be processed in order to get an
+ // accurate count of Decl's.
+ llvm::SmallVector<const Decl *, 16> Decls;
+ for (const Decl *SubDecl : Record->decls()) {
+ // Ignore implicit Decl's.
+ if (SubDecl->isImplicit()) {
+ continue;
+ }
+ // Ignore Decl's that are not in the context of the CXXRecordDecl.
+ if (SubDecl->getDeclContext() != Record) {
+ continue;
+ }
+ Decls.push_back(SubDecl);
+ }
+
+ ID.AddInteger(Decls.size());
+ for (auto SubDecl : Decls) {
+ AddSubDecl(SubDecl);
+ }
+
+ ID.AddInteger(Record->getNumBases());
+ for (auto base : Record->bases()) {
+ AddBoolean(base.isVirtual());
+ AddQualType(base.getType());
+ }
+
+ const ClassTemplateDecl *TD = Record->getDescribedClassTemplate();
+ AddBoolean(TD);
+ if (TD) {
+ AddTemplateParameterList(TD->getTemplateParameters());
+ }
+}
+
+void ODRHash::AddDecl(const Decl *D) {
+ assert(D && "Expecting non-null pointer.");
+ auto Result = DeclMap.insert(std::make_pair(D, DeclMap.size()));
+ ID.AddInteger(Result.first->second);
+ // On first encounter of a Decl pointer, process it. Every time afterwards,
+ // only the index value is needed.
+ if (!Result.second) {
+ return;
+ }
+
+ // Unlike the DeclVisitor, this adds a limited amount of information to
+ // identify the Decl.
+ ID.AddInteger(D->getKind());
+
+ // Unlike other places where AddBoolean is used with possibly null pointers,
+ // the nullness of the following pointers is already encoded with the
+ // DeclKind value, so there is no ambiguity on what information is added.
+ if (const auto *ND = dyn_cast<NamedDecl>(D)) {
+ AddDeclarationName(ND->getDeclName());
+ }
+
+ if (const auto *Typedef = dyn_cast<TypedefNameDecl>(D)) {
+ AddQualType(Typedef->getUnderlyingType());
+ }
+
+ if (const auto *Alias = dyn_cast<NamespaceAliasDecl>(D)) {
+ AddDecl(Alias->getNamespace());
+ }
+}
+
+// Process a Type pointer. Add* methods call back into ODRHash while Visit*
+// methods process the relevant parts of the Type.
+class ODRTypeVisitor : public TypeVisitor<ODRTypeVisitor> {
+ typedef TypeVisitor<ODRTypeVisitor> Inherited;
+ llvm::FoldingSetNodeID &ID;
+ ODRHash &Hash;
+
+public:
+ ODRTypeVisitor(llvm::FoldingSetNodeID &ID, ODRHash &Hash)
+ : ID(ID), Hash(Hash) {}
+
+ void AddType(const Type *T) {
+ Hash.AddType(T);
+ }
+
+ void AddQualType(QualType T) {
+ Hash.AddQualType(T);
+ }
+
+ void AddDecl(Decl *D) {
+ Hash.AddBoolean(D);
+ if (D) {
+ Hash.AddDecl(D);
+ }
+ }
+
+ void AddTemplateArgument(TemplateArgument TA) {
+ Hash.AddTemplateArgument(TA);
+ }
+
+ void AddStmt(Stmt *S) {
+ Hash.AddBoolean(S);
+ if (S) {
+ Hash.AddStmt(S);
+ }
+ }
+
+ void AddNestedNameSpecifier(NestedNameSpecifier *NNS) {
+ Hash.AddBoolean(NNS);
+ if (NNS) {
+ Hash.AddNestedNameSpecifier(NNS);
+ }
+ }
+ void AddIdentiferInfo(const IdentifierInfo *II) {
+ Hash.AddBoolean(II);
+ if (II) {
+ Hash.AddIdentifierInfo(II);
+ }
+ }
+
+ void AddTemplateName(TemplateName TN) {
+ Hash.AddTemplateName(TN);
+ }
+
+ void VisitQualifiers(Qualifiers Quals) {
+ ID.AddInteger(Quals.getAsOpaqueValue());
+ }
+
+ void Visit(const Type *T) {
+ ID.AddInteger(T->getTypeClass());
+ Inherited::Visit(T);
+ }
+
+ void VisitType(const Type *T) {}
+
+ void VisitAdjustedType(const AdjustedType *T) {
+ AddQualType(T->getOriginalType());
+ AddQualType(T->getAdjustedType());
+ VisitType(T);
+ }
+
+ void VisitDecayedType(const DecayedType *T) {
+ AddQualType(T->getDecayedType());
+ AddQualType(T->getPointeeType());
+ VisitAdjustedType(T);
+ }
+
+ void VisitArrayType(const ArrayType *T) {
+ AddQualType(T->getElementType());
+ ID.AddInteger(T->getSizeModifier());
+ VisitQualifiers(T->getIndexTypeQualifiers());
+ VisitType(T);
+ }
+ void VisitConstantArrayType(const ConstantArrayType *T) {
+ T->getSize().Profile(ID);
+ VisitArrayType(T);
+ }
+
+ void VisitDependentSizedArrayType(const DependentSizedArrayType *T) {
+ AddStmt(T->getSizeExpr());
+ VisitArrayType(T);
+ }
+
+ void VisitIncompleteArrayType(const IncompleteArrayType *T) {
+ VisitArrayType(T);
+ }
+
+ void VisitVariableArrayType(const VariableArrayType *T) {
+ AddStmt(T->getSizeExpr());
+ VisitArrayType(T);
+ }
+
+ void VisitAtomicType(const AtomicType *T) {
+ AddQualType(T->getValueType());
+ VisitType(T);
+ }
+
+ void VisitAttributedType(const AttributedType *T) {
+ ID.AddInteger(T->getAttrKind());
+ AddQualType(T->getModifiedType());
+ AddQualType(T->getEquivalentType());
+ VisitType(T);
+ }
+
+ void VisitBlockPointerType(const BlockPointerType *T) {
+ AddQualType(T->getPointeeType());
+ VisitType(T);
+ }
+
+ void VisitBuiltinType(const BuiltinType *T) {
+ ID.AddInteger(T->getKind());
+ VisitType(T);
+ }
+
+ void VisitComplexType(const ComplexType *T) {
+ AddQualType(T->getElementType());
+ VisitType(T);
+ }
+
+ void VisitDecltypeType(const DecltypeType *T) {
+ AddQualType(T->getUnderlyingType());
+ AddStmt(T->getUnderlyingExpr());
+ VisitType(T);
+ }
+
+ void VisitDependentSizedExtVectorType(const DependentSizedExtVectorType *T) {
+ AddQualType(T->getElementType());
+ AddStmt(T->getSizeExpr());
+ VisitType(T);
+ }
+
+ void VisitFunctionType(const FunctionType *T) {
+ AddQualType(T->getReturnType());
+ T->getExtInfo().Profile(ID);
+ Hash.AddBoolean(T->isConst());
+ Hash.AddBoolean(T->isVolatile());
+ Hash.AddBoolean(T->isRestrict());
+ VisitType(T);
+ }
+
+ void VisitFunctionNoProtoType(const FunctionNoProtoType *T) {
+ VisitFunctionType(T);
+ }
+
+ void VisitFunctionProtoType(const FunctionProtoType *T) {
+ ID.AddInteger(T->getNumParams());
+ for (auto ParamType : T->getParamTypes())
+ AddQualType(ParamType);
+
+ const auto &epi = T->getExtProtoInfo();
+ ID.AddInteger(epi.Variadic);
+ ID.AddInteger(epi.TypeQuals);
+ ID.AddInteger(epi.RefQualifier);
+ ID.AddInteger(epi.ExceptionSpec.Type);
+
+ if (epi.ExceptionSpec.Type == EST_Dynamic) {
+ for (QualType Ex : epi.ExceptionSpec.Exceptions)
+ AddQualType(Ex);
+ } else if (epi.ExceptionSpec.Type == EST_ComputedNoexcept &&
+ epi.ExceptionSpec.NoexceptExpr) {
+ AddStmt(epi.ExceptionSpec.NoexceptExpr);
+ } else if (epi.ExceptionSpec.Type == EST_Uninstantiated ||
+ epi.ExceptionSpec.Type == EST_Unevaluated) {
+ AddDecl(epi.ExceptionSpec.SourceDecl->getCanonicalDecl());
+ }
+ if (epi.ExtParameterInfos) {
+ for (unsigned i = 0; i != T->getNumParams(); ++i)
+ ID.AddInteger(epi.ExtParameterInfos[i].getOpaqueValue());
+ }
+ epi.ExtInfo.Profile(ID);
+ Hash.AddBoolean(epi.HasTrailingReturn);
+
+ VisitFunctionType(T);
+ }
+
+ void VisitInjectedClassNameType(const InjectedClassNameType *T) {
+ AddDecl(T->getDecl());
+ VisitType(T);
+ }
+
+ void VisitMemberPointerType(const MemberPointerType *T) {
+ AddQualType(T->getPointeeType());
+ AddType(T->getClass());
+ VisitType(T);
+ }
+
+ void VisitObjCObjectPointerType(const ObjCObjectPointerType *T) {
+ AddQualType(T->getPointeeType());
+ VisitType(T);
+ }
+
+ void VisitObjCObjectType(const ObjCObjectType *T) {
+ QualType Base = T->getBaseType();
+ Hash.AddBoolean(Base.getTypePtr() != T);
+ if (Base.getTypePtr() != T)
+ AddQualType(Base);
+ auto TypeArgs = T->getTypeArgsAsWritten();
+ ID.AddInteger(TypeArgs.size());
+ for (auto TypeArg : TypeArgs)
+ AddQualType(TypeArg);
+ ID.AddInteger(T->getNumProtocols());
+ for (auto proto : T->quals())
+ AddDecl(proto);
+ ID.AddInteger(T->isKindOfTypeAsWritten());
+ VisitType(T);
+ }
+
+ void VisitObjCInterfaceType(const ObjCInterfaceType *T) {
+ VisitObjCObjectType(T);
+ }
+
+ void VisitObjCObjectTypeImpl(const ObjCObjectTypeImpl *T) {
+ VisitObjCObjectType(T);
+ }
+
+ void VisitPackExpansionType(const PackExpansionType *T) {
+ AddQualType(T->getPattern());
+ auto NumExpansions = T->getNumExpansions();
+ Hash.AddBoolean(NumExpansions.hasValue());
+ if (NumExpansions)
+ ID.AddInteger(*NumExpansions);
+ VisitType(T);
+ };
+
+ void VisitPointerType(const PointerType *T) {
+ AddQualType(T->getPointeeType());
+ VisitType(T);
+ }
+
+ void VisitReferenceType(const ReferenceType *T) {
+ AddQualType(T->getPointeeTypeAsWritten());
+ VisitType(T);
+ }
+
+ void VisitLValueReferenceType(const LValueReferenceType *T) {
+ VisitReferenceType(T);
+ }
+
+ void VisitRValueReferenceType(const RValueReferenceType *T) {
+ VisitReferenceType(T);
+ }
+
+ void VisitSubstTemplateTypeParmType(const SubstTemplateTypeParmType *T) {
+ AddQualType(T->getReplacementType());
+ AddType(T->getReplacedParameter());
+ VisitType(T);
+ }
+
+ void
+ VisitSubstTemplateTypeParmPackType(const SubstTemplateTypeParmPackType *T) {
+ AddType(T->getReplacedParameter());
+ AddTemplateArgument(T->getArgumentPack());
+ VisitType(T);
+ }
+
+ void VisitTagType(const TagType *T) {
+ AddDecl(T->getDecl());
+ Hash.AddBoolean(T->isBeingDefined());
+ VisitType(T);
+ }
+
+ void VisitEnumType(const EnumType *T) {
+ AddDecl(T->getDecl());
+ VisitTagType(T);
+ }
+
+ void VisitRecordType(const RecordType *T) {
+ AddDecl(T->getDecl());
+ VisitTagType(T);
+ }
+
+ void VisitTemplateSpecializationType(const TemplateSpecializationType *T) {
+ AddTemplateName(T->getTemplateName());
+ ID.AddInteger(T->getNumArgs());
+ for (auto I = T->begin(), E = T->end(); I != E; ++I)
+ AddTemplateArgument(*I);
+ VisitType(T);
+ }
+
+ void VisitTemplateTypeParmType(const TemplateTypeParmType *T) {
+ ID.AddInteger(T->getDepth());
+ ID.AddInteger(T->getIndex());
+ Hash.AddBoolean(T->isParameterPack());
+ AddDecl(T->getDecl());
+ VisitType(T);
+ }
+
+ void VisitTypedefType(const TypedefType *T) {
+ AddDecl(T->getDecl());
+ VisitType(T);
+ }
+
+ void VisitTypeOfExprType(const TypeOfExprType *T) {
+ AddStmt(T->getUnderlyingExpr());
+ VisitType(T);
+ }
+
+ void VisitDependentTypeOfExprType(const DependentTypeOfExprType *T) {
+ VisitTypeOfExprType(T);
+ }
+
+ void VisitTypeWithKeyword(const TypeWithKeyword *T) { VisitType(T); }
+
+ void VisitElaboratedType(const ElaboratedType *T) {
+ ID.AddInteger(T->getKeyword());
+ AddNestedNameSpecifier(T->getQualifier());
+ AddQualType(T->getNamedType());
+ VisitTypeWithKeyword(T);
+ }
+
+ void VisitUnaryTransformType(const UnaryTransformType *T) {
+ AddQualType(T->getBaseType());
+ ID.AddInteger(T->getUTTKind());
+ VisitType(T);
+ }
+
+ void VisitDependentUnaryTransformType(const DependentUnaryTransformType *T) {
+ VisitUnaryTransformType(T);
+ }
+
+ void VisitUnresolvedUsingType(const UnresolvedUsingType *T) {
+ AddDecl(T->getDecl());
+ VisitType(T);
+ }
+
+ void VisitVectorType(const VectorType *T) {
+ AddQualType(T->getElementType());
+ ID.AddInteger(T->getNumElements());
+ ID.AddInteger(T->getVectorKind());
+ VisitType(T);
+ }
+
+ void VisitExtVectorType(const ExtVectorType *T) { VisitVectorType(T); }
+};
+
+void ODRHash::AddType(const Type *T) {
+ assert(T && "Expecting non-null pointer.");
+ auto Result = TypeMap.insert(std::make_pair(T, TypeMap.size()));
+ ID.AddInteger(Result.first->second);
+ // On first encounter of a Type pointer, process it. Every time afterwards,
+ // only the index value is needed.
+ if (!Result.second) {
+ return;
+ }
+
+ ODRTypeVisitor(ID, *this).Visit(T);
+}
+
+void ODRHash::AddQualType(QualType T) {
+ AddBoolean(T.isNull());
+ if (T.isNull())
+ return;
+ SplitQualType split = T.split();
+ ID.AddInteger(split.Quals.getAsOpaqueValue());
+ AddType(split.Ty);
+}
+
+void ODRHash::AddBoolean(bool Value) {
+ Bools.push_back(Value);
+}
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