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/DeclCXX.h" 16 #include "clang/AST/DeclObjC.h" 17 #include "clang/Basic/IdentifierTable.h" 18 #include "clang/Serialization/ASTDeserializationListener.h" 19 #include "llvm/ADT/StringExtras.h" 20 21 using namespace clang; 22 23 // Give ASTDeserializationListener's VTable a home. 24 ASTDeserializationListener::~ASTDeserializationListener() { } 25 26 serialization::TypeIdx 27 serialization::TypeIdxFromBuiltin(const BuiltinType *BT) { 28 unsigned ID = 0; 29 switch (BT->getKind()) { 30 case BuiltinType::Void: 31 ID = PREDEF_TYPE_VOID_ID; 32 break; 33 case BuiltinType::Bool: 34 ID = PREDEF_TYPE_BOOL_ID; 35 break; 36 case BuiltinType::Char_U: 37 ID = PREDEF_TYPE_CHAR_U_ID; 38 break; 39 case BuiltinType::UChar: 40 ID = PREDEF_TYPE_UCHAR_ID; 41 break; 42 case BuiltinType::UShort: 43 ID = PREDEF_TYPE_USHORT_ID; 44 break; 45 case BuiltinType::UInt: 46 ID = PREDEF_TYPE_UINT_ID; 47 break; 48 case BuiltinType::ULong: 49 ID = PREDEF_TYPE_ULONG_ID; 50 break; 51 case BuiltinType::ULongLong: 52 ID = PREDEF_TYPE_ULONGLONG_ID; 53 break; 54 case BuiltinType::UInt128: 55 ID = PREDEF_TYPE_UINT128_ID; 56 break; 57 case BuiltinType::Char_S: 58 ID = PREDEF_TYPE_CHAR_S_ID; 59 break; 60 case BuiltinType::SChar: 61 ID = PREDEF_TYPE_SCHAR_ID; 62 break; 63 case BuiltinType::WChar_S: 64 case BuiltinType::WChar_U: 65 ID = PREDEF_TYPE_WCHAR_ID; 66 break; 67 case BuiltinType::Short: 68 ID = PREDEF_TYPE_SHORT_ID; 69 break; 70 case BuiltinType::Int: 71 ID = PREDEF_TYPE_INT_ID; 72 break; 73 case BuiltinType::Long: 74 ID = PREDEF_TYPE_LONG_ID; 75 break; 76 case BuiltinType::LongLong: 77 ID = PREDEF_TYPE_LONGLONG_ID; 78 break; 79 case BuiltinType::Int128: 80 ID = PREDEF_TYPE_INT128_ID; 81 break; 82 case BuiltinType::Half: 83 ID = PREDEF_TYPE_HALF_ID; 84 break; 85 case BuiltinType::Float: 86 ID = PREDEF_TYPE_FLOAT_ID; 87 break; 88 case BuiltinType::Double: 89 ID = PREDEF_TYPE_DOUBLE_ID; 90 break; 91 case BuiltinType::LongDouble: 92 ID = PREDEF_TYPE_LONGDOUBLE_ID; 93 break; 94 case BuiltinType::NullPtr: 95 ID = PREDEF_TYPE_NULLPTR_ID; 96 break; 97 case BuiltinType::Char16: 98 ID = PREDEF_TYPE_CHAR16_ID; 99 break; 100 case BuiltinType::Char32: 101 ID = PREDEF_TYPE_CHAR32_ID; 102 break; 103 case BuiltinType::Overload: 104 ID = PREDEF_TYPE_OVERLOAD_ID; 105 break; 106 case BuiltinType::BoundMember: 107 ID = PREDEF_TYPE_BOUND_MEMBER; 108 break; 109 case BuiltinType::PseudoObject: 110 ID = PREDEF_TYPE_PSEUDO_OBJECT; 111 break; 112 case BuiltinType::Dependent: 113 ID = PREDEF_TYPE_DEPENDENT_ID; 114 break; 115 case BuiltinType::UnknownAny: 116 ID = PREDEF_TYPE_UNKNOWN_ANY; 117 break; 118 case BuiltinType::ARCUnbridgedCast: 119 ID = PREDEF_TYPE_ARC_UNBRIDGED_CAST; 120 break; 121 case BuiltinType::ObjCId: 122 ID = PREDEF_TYPE_OBJC_ID; 123 break; 124 case BuiltinType::ObjCClass: 125 ID = PREDEF_TYPE_OBJC_CLASS; 126 break; 127 case BuiltinType::ObjCSel: 128 ID = PREDEF_TYPE_OBJC_SEL; 129 break; 130 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ 131 case BuiltinType::Id: \ 132 ID = PREDEF_TYPE_##Id##_ID; \ 133 break; 134 #include "clang/Basic/OpenCLImageTypes.def" 135 case BuiltinType::OCLSampler: 136 ID = PREDEF_TYPE_SAMPLER_ID; 137 break; 138 case BuiltinType::OCLEvent: 139 ID = PREDEF_TYPE_EVENT_ID; 140 break; 141 case BuiltinType::OCLClkEvent: 142 ID = PREDEF_TYPE_CLK_EVENT_ID; 143 break; 144 case BuiltinType::OCLQueue: 145 ID = PREDEF_TYPE_QUEUE_ID; 146 break; 147 case BuiltinType::OCLNDRange: 148 ID = PREDEF_TYPE_NDRANGE_ID; 149 break; 150 case BuiltinType::OCLReserveID: 151 ID = PREDEF_TYPE_RESERVE_ID_ID; 152 break; 153 case BuiltinType::BuiltinFn: 154 ID = PREDEF_TYPE_BUILTIN_FN; 155 break; 156 case BuiltinType::OMPArraySection: 157 ID = PREDEF_TYPE_OMP_ARRAY_SECTION; 158 break; 159 } 160 161 return TypeIdx(ID); 162 } 163 164 unsigned serialization::ComputeHash(Selector Sel) { 165 unsigned N = Sel.getNumArgs(); 166 if (N == 0) 167 ++N; 168 unsigned R = 5381; 169 for (unsigned I = 0; I != N; ++I) 170 if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I)) 171 R = llvm::HashString(II->getName(), R); 172 return R; 173 } 174 175 const DeclContext * 176 serialization::getDefinitiveDeclContext(const DeclContext *DC) { 177 switch (DC->getDeclKind()) { 178 // These entities may have multiple definitions. 179 case Decl::TranslationUnit: 180 case Decl::ExternCContext: 181 case Decl::Namespace: 182 case Decl::LinkageSpec: 183 return nullptr; 184 185 // C/C++ tag types can only be defined in one place. 186 case Decl::Enum: 187 case Decl::Record: 188 if (const TagDecl *Def = cast<TagDecl>(DC)->getDefinition()) 189 return Def; 190 return nullptr; 191 192 // FIXME: These can be defined in one place... except special member 193 // functions and out-of-line definitions. 194 case Decl::CXXRecord: 195 case Decl::ClassTemplateSpecialization: 196 case Decl::ClassTemplatePartialSpecialization: 197 return nullptr; 198 199 // Each function, method, and block declaration is its own DeclContext. 200 case Decl::Function: 201 case Decl::CXXMethod: 202 case Decl::CXXConstructor: 203 case Decl::CXXDestructor: 204 case Decl::CXXConversion: 205 case Decl::ObjCMethod: 206 case Decl::Block: 207 case Decl::Captured: 208 // Objective C categories, category implementations, and class 209 // implementations can only be defined in one place. 210 case Decl::ObjCCategory: 211 case Decl::ObjCCategoryImpl: 212 case Decl::ObjCImplementation: 213 return DC; 214 215 case Decl::ObjCProtocol: 216 if (const ObjCProtocolDecl *Def 217 = cast<ObjCProtocolDecl>(DC)->getDefinition()) 218 return Def; 219 return nullptr; 220 221 // FIXME: These are defined in one place, but properties in class extensions 222 // end up being back-patched into the main interface. See 223 // Sema::HandlePropertyInClassExtension for the offending code. 224 case Decl::ObjCInterface: 225 return nullptr; 226 227 default: 228 llvm_unreachable("Unhandled DeclContext in AST reader"); 229 } 230 231 llvm_unreachable("Unhandled decl kind"); 232 } 233 234 bool serialization::isRedeclarableDeclKind(unsigned Kind) { 235 switch (static_cast<Decl::Kind>(Kind)) { 236 case Decl::TranslationUnit: 237 case Decl::ExternCContext: 238 // Special case of a "merged" declaration. 239 return true; 240 241 case Decl::Namespace: 242 case Decl::NamespaceAlias: 243 case Decl::Typedef: 244 case Decl::TypeAlias: 245 case Decl::Enum: 246 case Decl::Record: 247 case Decl::CXXRecord: 248 case Decl::ClassTemplateSpecialization: 249 case Decl::ClassTemplatePartialSpecialization: 250 case Decl::VarTemplateSpecialization: 251 case Decl::VarTemplatePartialSpecialization: 252 case Decl::Function: 253 case Decl::CXXMethod: 254 case Decl::CXXConstructor: 255 case Decl::CXXDestructor: 256 case Decl::CXXConversion: 257 case Decl::UsingShadow: 258 case Decl::Var: 259 case Decl::FunctionTemplate: 260 case Decl::ClassTemplate: 261 case Decl::VarTemplate: 262 case Decl::TypeAliasTemplate: 263 case Decl::ObjCProtocol: 264 case Decl::ObjCInterface: 265 case Decl::Empty: 266 return true; 267 268 // Never redeclarable. 269 case Decl::UsingDirective: 270 case Decl::Label: 271 case Decl::UnresolvedUsingTypename: 272 case Decl::TemplateTypeParm: 273 case Decl::EnumConstant: 274 case Decl::UnresolvedUsingValue: 275 case Decl::IndirectField: 276 case Decl::Field: 277 case Decl::MSProperty: 278 case Decl::ObjCIvar: 279 case Decl::ObjCAtDefsField: 280 case Decl::NonTypeTemplateParm: 281 case Decl::TemplateTemplateParm: 282 case Decl::Using: 283 case Decl::ObjCMethod: 284 case Decl::ObjCCategory: 285 case Decl::ObjCCategoryImpl: 286 case Decl::ObjCImplementation: 287 case Decl::ObjCProperty: 288 case Decl::ObjCCompatibleAlias: 289 case Decl::LinkageSpec: 290 case Decl::ObjCPropertyImpl: 291 case Decl::PragmaComment: 292 case Decl::PragmaDetectMismatch: 293 case Decl::FileScopeAsm: 294 case Decl::AccessSpec: 295 case Decl::Friend: 296 case Decl::FriendTemplate: 297 case Decl::StaticAssert: 298 case Decl::Block: 299 case Decl::Captured: 300 case Decl::ClassScopeFunctionSpecialization: 301 case Decl::Import: 302 case Decl::OMPThreadPrivate: 303 case Decl::OMPCapturedExpr: 304 case Decl::OMPDeclareReduction: 305 case Decl::BuiltinTemplate: 306 return false; 307 308 // These indirectly derive from Redeclarable<T> but are not actually 309 // redeclarable. 310 case Decl::ImplicitParam: 311 case Decl::ParmVar: 312 case Decl::ObjCTypeParam: 313 return false; 314 } 315 316 llvm_unreachable("Unhandled declaration kind"); 317 } 318 319 bool serialization::needsAnonymousDeclarationNumber(const NamedDecl *D) { 320 // Friend declarations in dependent contexts aren't anonymous in the usual 321 // sense, but they cannot be found by name lookup in their semantic context 322 // (or indeed in any context), so we treat them as anonymous. 323 // 324 // This doesn't apply to friend tag decls; Sema makes those available to name 325 // lookup in the surrounding context. 326 if (D->getFriendObjectKind() && 327 D->getLexicalDeclContext()->isDependentContext() && !isa<TagDecl>(D)) { 328 // For function templates and class templates, the template is numbered and 329 // not its pattern. 330 if (auto *FD = dyn_cast<FunctionDecl>(D)) 331 return !FD->getDescribedFunctionTemplate(); 332 if (auto *RD = dyn_cast<CXXRecordDecl>(D)) 333 return !RD->getDescribedClassTemplate(); 334 return true; 335 } 336 337 // Otherwise, we only care about anonymous class members. 338 if (D->getDeclName() || !isa<CXXRecordDecl>(D->getLexicalDeclContext())) 339 return false; 340 return isa<TagDecl>(D) || isa<FieldDecl>(D); 341 } 342 343