1 //===--- ASTCommon.cpp - Common stuff for ASTReader/ASTWriter----*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines common functions that both ASTReader and ASTWriter use. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "ASTCommon.h" 15 #include "clang/AST/DeclObjC.h" 16 #include "clang/Basic/IdentifierTable.h" 17 #include "clang/Serialization/ASTDeserializationListener.h" 18 #include "llvm/ADT/StringExtras.h" 19 20 using namespace clang; 21 22 // Give ASTDeserializationListener's VTable a home. 23 ASTDeserializationListener::~ASTDeserializationListener() { } 24 25 serialization::TypeIdx 26 serialization::TypeIdxFromBuiltin(const BuiltinType *BT) { 27 unsigned ID = 0; 28 switch (BT->getKind()) { 29 case BuiltinType::Void: ID = PREDEF_TYPE_VOID_ID; break; 30 case BuiltinType::Bool: ID = PREDEF_TYPE_BOOL_ID; break; 31 case BuiltinType::Char_U: ID = PREDEF_TYPE_CHAR_U_ID; break; 32 case BuiltinType::UChar: ID = PREDEF_TYPE_UCHAR_ID; break; 33 case BuiltinType::UShort: ID = PREDEF_TYPE_USHORT_ID; break; 34 case BuiltinType::UInt: ID = PREDEF_TYPE_UINT_ID; break; 35 case BuiltinType::ULong: ID = PREDEF_TYPE_ULONG_ID; break; 36 case BuiltinType::ULongLong: ID = PREDEF_TYPE_ULONGLONG_ID; break; 37 case BuiltinType::UInt128: ID = PREDEF_TYPE_UINT128_ID; break; 38 case BuiltinType::Char_S: ID = PREDEF_TYPE_CHAR_S_ID; break; 39 case BuiltinType::SChar: ID = PREDEF_TYPE_SCHAR_ID; break; 40 case BuiltinType::WChar_S: 41 case BuiltinType::WChar_U: ID = PREDEF_TYPE_WCHAR_ID; break; 42 case BuiltinType::Short: ID = PREDEF_TYPE_SHORT_ID; break; 43 case BuiltinType::Int: ID = PREDEF_TYPE_INT_ID; break; 44 case BuiltinType::Long: ID = PREDEF_TYPE_LONG_ID; break; 45 case BuiltinType::LongLong: ID = PREDEF_TYPE_LONGLONG_ID; break; 46 case BuiltinType::Int128: ID = PREDEF_TYPE_INT128_ID; break; 47 case BuiltinType::Half: ID = PREDEF_TYPE_HALF_ID; break; 48 case BuiltinType::Float: ID = PREDEF_TYPE_FLOAT_ID; break; 49 case BuiltinType::Double: ID = PREDEF_TYPE_DOUBLE_ID; break; 50 case BuiltinType::LongDouble: ID = PREDEF_TYPE_LONGDOUBLE_ID; break; 51 case BuiltinType::NullPtr: ID = PREDEF_TYPE_NULLPTR_ID; break; 52 case BuiltinType::Char16: ID = PREDEF_TYPE_CHAR16_ID; break; 53 case BuiltinType::Char32: ID = PREDEF_TYPE_CHAR32_ID; break; 54 case BuiltinType::Overload: ID = PREDEF_TYPE_OVERLOAD_ID; break; 55 case BuiltinType::BoundMember:ID = PREDEF_TYPE_BOUND_MEMBER; break; 56 case BuiltinType::PseudoObject:ID = PREDEF_TYPE_PSEUDO_OBJECT;break; 57 case BuiltinType::Dependent: ID = PREDEF_TYPE_DEPENDENT_ID; break; 58 case BuiltinType::UnknownAny: ID = PREDEF_TYPE_UNKNOWN_ANY; break; 59 case BuiltinType::ARCUnbridgedCast: 60 ID = PREDEF_TYPE_ARC_UNBRIDGED_CAST; break; 61 case BuiltinType::ObjCId: ID = PREDEF_TYPE_OBJC_ID; break; 62 case BuiltinType::ObjCClass: ID = PREDEF_TYPE_OBJC_CLASS; break; 63 case BuiltinType::ObjCSel: ID = PREDEF_TYPE_OBJC_SEL; break; 64 case BuiltinType::OCLImage1d: ID = PREDEF_TYPE_IMAGE1D_ID; break; 65 case BuiltinType::OCLImage1dArray: ID = PREDEF_TYPE_IMAGE1D_ARR_ID; break; 66 case BuiltinType::OCLImage1dBuffer: ID = PREDEF_TYPE_IMAGE1D_BUFF_ID; break; 67 case BuiltinType::OCLImage2d: ID = PREDEF_TYPE_IMAGE2D_ID; break; 68 case BuiltinType::OCLImage2dArray: ID = PREDEF_TYPE_IMAGE2D_ARR_ID; break; 69 case BuiltinType::OCLImage3d: ID = PREDEF_TYPE_IMAGE3D_ID; break; 70 case BuiltinType::OCLSampler: ID = PREDEF_TYPE_SAMPLER_ID; break; 71 case BuiltinType::OCLEvent: ID = PREDEF_TYPE_EVENT_ID; break; 72 case BuiltinType::BuiltinFn: 73 ID = PREDEF_TYPE_BUILTIN_FN; break; 74 75 } 76 77 return TypeIdx(ID); 78 } 79 80 unsigned serialization::ComputeHash(Selector Sel) { 81 unsigned N = Sel.getNumArgs(); 82 if (N == 0) 83 ++N; 84 unsigned R = 5381; 85 for (unsigned I = 0; I != N; ++I) 86 if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I)) 87 R = llvm::HashString(II->getName(), R); 88 return R; 89 } 90 91 const DeclContext * 92 serialization::getDefinitiveDeclContext(const DeclContext *DC) { 93 switch (DC->getDeclKind()) { 94 // These entities may have multiple definitions. 95 case Decl::TranslationUnit: 96 case Decl::Namespace: 97 case Decl::LinkageSpec: 98 return nullptr; 99 100 // C/C++ tag types can only be defined in one place. 101 case Decl::Enum: 102 case Decl::Record: 103 if (const TagDecl *Def = cast<TagDecl>(DC)->getDefinition()) 104 return Def; 105 return nullptr; 106 107 // FIXME: These can be defined in one place... except special member 108 // functions and out-of-line definitions. 109 case Decl::CXXRecord: 110 case Decl::ClassTemplateSpecialization: 111 case Decl::ClassTemplatePartialSpecialization: 112 return nullptr; 113 114 // Each function, method, and block declaration is its own DeclContext. 115 case Decl::Function: 116 case Decl::CXXMethod: 117 case Decl::CXXConstructor: 118 case Decl::CXXDestructor: 119 case Decl::CXXConversion: 120 case Decl::ObjCMethod: 121 case Decl::Block: 122 case Decl::Captured: 123 // Objective C categories, category implementations, and class 124 // implementations can only be defined in one place. 125 case Decl::ObjCCategory: 126 case Decl::ObjCCategoryImpl: 127 case Decl::ObjCImplementation: 128 return DC; 129 130 case Decl::ObjCProtocol: 131 if (const ObjCProtocolDecl *Def 132 = cast<ObjCProtocolDecl>(DC)->getDefinition()) 133 return Def; 134 return nullptr; 135 136 // FIXME: These are defined in one place, but properties in class extensions 137 // end up being back-patched into the main interface. See 138 // Sema::HandlePropertyInClassExtension for the offending code. 139 case Decl::ObjCInterface: 140 return nullptr; 141 142 default: 143 llvm_unreachable("Unhandled DeclContext in AST reader"); 144 } 145 146 llvm_unreachable("Unhandled decl kind"); 147 } 148 149 bool serialization::isRedeclarableDeclKind(unsigned Kind) { 150 switch (static_cast<Decl::Kind>(Kind)) { 151 case Decl::TranslationUnit: // Special case of a "merged" declaration. 152 case Decl::Namespace: 153 case Decl::NamespaceAlias: // FIXME: Not yet redeclarable, but will be. 154 case Decl::Typedef: 155 case Decl::TypeAlias: 156 case Decl::Enum: 157 case Decl::Record: 158 case Decl::CXXRecord: 159 case Decl::ClassTemplateSpecialization: 160 case Decl::ClassTemplatePartialSpecialization: 161 case Decl::VarTemplateSpecialization: 162 case Decl::VarTemplatePartialSpecialization: 163 case Decl::Function: 164 case Decl::CXXMethod: 165 case Decl::CXXConstructor: 166 case Decl::CXXDestructor: 167 case Decl::CXXConversion: 168 case Decl::UsingShadow: 169 case Decl::Var: 170 case Decl::FunctionTemplate: 171 case Decl::ClassTemplate: 172 case Decl::VarTemplate: 173 case Decl::TypeAliasTemplate: 174 case Decl::ObjCProtocol: 175 case Decl::ObjCInterface: 176 case Decl::Empty: 177 return true; 178 179 // Never redeclarable. 180 case Decl::UsingDirective: 181 case Decl::Label: 182 case Decl::UnresolvedUsingTypename: 183 case Decl::TemplateTypeParm: 184 case Decl::EnumConstant: 185 case Decl::UnresolvedUsingValue: 186 case Decl::IndirectField: 187 case Decl::Field: 188 case Decl::MSProperty: 189 case Decl::ObjCIvar: 190 case Decl::ObjCAtDefsField: 191 case Decl::ImplicitParam: 192 case Decl::ParmVar: 193 case Decl::NonTypeTemplateParm: 194 case Decl::TemplateTemplateParm: 195 case Decl::Using: 196 case Decl::ObjCMethod: 197 case Decl::ObjCCategory: 198 case Decl::ObjCCategoryImpl: 199 case Decl::ObjCImplementation: 200 case Decl::ObjCProperty: 201 case Decl::ObjCCompatibleAlias: 202 case Decl::LinkageSpec: 203 case Decl::ObjCPropertyImpl: 204 case Decl::FileScopeAsm: 205 case Decl::AccessSpec: 206 case Decl::Friend: 207 case Decl::FriendTemplate: 208 case Decl::StaticAssert: 209 case Decl::Block: 210 case Decl::Captured: 211 case Decl::ClassScopeFunctionSpecialization: 212 case Decl::Import: 213 case Decl::OMPThreadPrivate: 214 return false; 215 } 216 217 llvm_unreachable("Unhandled declaration kind"); 218 } 219
