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/Support/DJB.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::ShortAccum: 95 ID = PREDEF_TYPE_SHORT_ACCUM_ID; 96 break; 97 case BuiltinType::Accum: 98 ID = PREDEF_TYPE_ACCUM_ID; 99 break; 100 case BuiltinType::LongAccum: 101 ID = PREDEF_TYPE_LONG_ACCUM_ID; 102 break; 103 case BuiltinType::UShortAccum: 104 ID = PREDEF_TYPE_USHORT_ACCUM_ID; 105 break; 106 case BuiltinType::UAccum: 107 ID = PREDEF_TYPE_UACCUM_ID; 108 break; 109 case BuiltinType::ULongAccum: 110 ID = PREDEF_TYPE_ULONG_ACCUM_ID; 111 break; 112 case BuiltinType::Float16: 113 ID = PREDEF_TYPE_FLOAT16_ID; 114 break; 115 case BuiltinType::Float128: 116 ID = PREDEF_TYPE_FLOAT128_ID; 117 break; 118 case BuiltinType::NullPtr: 119 ID = PREDEF_TYPE_NULLPTR_ID; 120 break; 121 case BuiltinType::Char8: 122 ID = PREDEF_TYPE_CHAR8_ID; 123 break; 124 case BuiltinType::Char16: 125 ID = PREDEF_TYPE_CHAR16_ID; 126 break; 127 case BuiltinType::Char32: 128 ID = PREDEF_TYPE_CHAR32_ID; 129 break; 130 case BuiltinType::Overload: 131 ID = PREDEF_TYPE_OVERLOAD_ID; 132 break; 133 case BuiltinType::BoundMember: 134 ID = PREDEF_TYPE_BOUND_MEMBER; 135 break; 136 case BuiltinType::PseudoObject: 137 ID = PREDEF_TYPE_PSEUDO_OBJECT; 138 break; 139 case BuiltinType::Dependent: 140 ID = PREDEF_TYPE_DEPENDENT_ID; 141 break; 142 case BuiltinType::UnknownAny: 143 ID = PREDEF_TYPE_UNKNOWN_ANY; 144 break; 145 case BuiltinType::ARCUnbridgedCast: 146 ID = PREDEF_TYPE_ARC_UNBRIDGED_CAST; 147 break; 148 case BuiltinType::ObjCId: 149 ID = PREDEF_TYPE_OBJC_ID; 150 break; 151 case BuiltinType::ObjCClass: 152 ID = PREDEF_TYPE_OBJC_CLASS; 153 break; 154 case BuiltinType::ObjCSel: 155 ID = PREDEF_TYPE_OBJC_SEL; 156 break; 157 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ 158 case BuiltinType::Id: \ 159 ID = PREDEF_TYPE_##Id##_ID; \ 160 break; 161 #include "clang/Basic/OpenCLImageTypes.def" 162 case BuiltinType::OCLSampler: 163 ID = PREDEF_TYPE_SAMPLER_ID; 164 break; 165 case BuiltinType::OCLEvent: 166 ID = PREDEF_TYPE_EVENT_ID; 167 break; 168 case BuiltinType::OCLClkEvent: 169 ID = PREDEF_TYPE_CLK_EVENT_ID; 170 break; 171 case BuiltinType::OCLQueue: 172 ID = PREDEF_TYPE_QUEUE_ID; 173 break; 174 case BuiltinType::OCLReserveID: 175 ID = PREDEF_TYPE_RESERVE_ID_ID; 176 break; 177 case BuiltinType::BuiltinFn: 178 ID = PREDEF_TYPE_BUILTIN_FN; 179 break; 180 case BuiltinType::OMPArraySection: 181 ID = PREDEF_TYPE_OMP_ARRAY_SECTION; 182 break; 183 } 184 185 return TypeIdx(ID); 186 } 187 188 unsigned serialization::ComputeHash(Selector Sel) { 189 unsigned N = Sel.getNumArgs(); 190 if (N == 0) 191 ++N; 192 unsigned R = 5381; 193 for (unsigned I = 0; I != N; ++I) 194 if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I)) 195 R = llvm::djbHash(II->getName(), R); 196 return R; 197 } 198 199 const DeclContext * 200 serialization::getDefinitiveDeclContext(const DeclContext *DC) { 201 switch (DC->getDeclKind()) { 202 // These entities may have multiple definitions. 203 case Decl::TranslationUnit: 204 case Decl::ExternCContext: 205 case Decl::Namespace: 206 case Decl::LinkageSpec: 207 case Decl::Export: 208 return nullptr; 209 210 // C/C++ tag types can only be defined in one place. 211 case Decl::Enum: 212 case Decl::Record: 213 if (const TagDecl *Def = cast<TagDecl>(DC)->getDefinition()) 214 return Def; 215 return nullptr; 216 217 // FIXME: These can be defined in one place... except special member 218 // functions and out-of-line definitions. 219 case Decl::CXXRecord: 220 case Decl::ClassTemplateSpecialization: 221 case Decl::ClassTemplatePartialSpecialization: 222 return nullptr; 223 224 // Each function, method, and block declaration is its own DeclContext. 225 case Decl::Function: 226 case Decl::CXXMethod: 227 case Decl::CXXConstructor: 228 case Decl::CXXDestructor: 229 case Decl::CXXConversion: 230 case Decl::ObjCMethod: 231 case Decl::Block: 232 case Decl::Captured: 233 // Objective C categories, category implementations, and class 234 // implementations can only be defined in one place. 235 case Decl::ObjCCategory: 236 case Decl::ObjCCategoryImpl: 237 case Decl::ObjCImplementation: 238 return DC; 239 240 case Decl::ObjCProtocol: 241 if (const ObjCProtocolDecl *Def 242 = cast<ObjCProtocolDecl>(DC)->getDefinition()) 243 return Def; 244 return nullptr; 245 246 // FIXME: These are defined in one place, but properties in class extensions 247 // end up being back-patched into the main interface. See 248 // Sema::HandlePropertyInClassExtension for the offending code. 249 case Decl::ObjCInterface: 250 return nullptr; 251 252 default: 253 llvm_unreachable("Unhandled DeclContext in AST reader"); 254 } 255 256 llvm_unreachable("Unhandled decl kind"); 257 } 258 259 bool serialization::isRedeclarableDeclKind(unsigned Kind) { 260 switch (static_cast<Decl::Kind>(Kind)) { 261 case Decl::TranslationUnit: 262 case Decl::ExternCContext: 263 // Special case of a "merged" declaration. 264 return true; 265 266 case Decl::Namespace: 267 case Decl::NamespaceAlias: 268 case Decl::Typedef: 269 case Decl::TypeAlias: 270 case Decl::Enum: 271 case Decl::Record: 272 case Decl::CXXRecord: 273 case Decl::ClassTemplateSpecialization: 274 case Decl::ClassTemplatePartialSpecialization: 275 case Decl::VarTemplateSpecialization: 276 case Decl::VarTemplatePartialSpecialization: 277 case Decl::Function: 278 case Decl::CXXDeductionGuide: 279 case Decl::CXXMethod: 280 case Decl::CXXConstructor: 281 case Decl::CXXDestructor: 282 case Decl::CXXConversion: 283 case Decl::UsingShadow: 284 case Decl::ConstructorUsingShadow: 285 case Decl::Var: 286 case Decl::FunctionTemplate: 287 case Decl::ClassTemplate: 288 case Decl::VarTemplate: 289 case Decl::TypeAliasTemplate: 290 case Decl::ObjCProtocol: 291 case Decl::ObjCInterface: 292 case Decl::Empty: 293 return true; 294 295 // Never redeclarable. 296 case Decl::UsingDirective: 297 case Decl::Label: 298 case Decl::UnresolvedUsingTypename: 299 case Decl::TemplateTypeParm: 300 case Decl::EnumConstant: 301 case Decl::UnresolvedUsingValue: 302 case Decl::IndirectField: 303 case Decl::Field: 304 case Decl::MSProperty: 305 case Decl::ObjCIvar: 306 case Decl::ObjCAtDefsField: 307 case Decl::NonTypeTemplateParm: 308 case Decl::TemplateTemplateParm: 309 case Decl::Using: 310 case Decl::UsingPack: 311 case Decl::ObjCMethod: 312 case Decl::ObjCCategory: 313 case Decl::ObjCCategoryImpl: 314 case Decl::ObjCImplementation: 315 case Decl::ObjCProperty: 316 case Decl::ObjCCompatibleAlias: 317 case Decl::LinkageSpec: 318 case Decl::Export: 319 case Decl::ObjCPropertyImpl: 320 case Decl::PragmaComment: 321 case Decl::PragmaDetectMismatch: 322 case Decl::FileScopeAsm: 323 case Decl::AccessSpec: 324 case Decl::Friend: 325 case Decl::FriendTemplate: 326 case Decl::StaticAssert: 327 case Decl::Block: 328 case Decl::Captured: 329 case Decl::ClassScopeFunctionSpecialization: 330 case Decl::Import: 331 case Decl::OMPThreadPrivate: 332 case Decl::OMPCapturedExpr: 333 case Decl::OMPDeclareReduction: 334 case Decl::BuiltinTemplate: 335 case Decl::Decomposition: 336 case Decl::Binding: 337 return false; 338 339 // These indirectly derive from Redeclarable<T> but are not actually 340 // redeclarable. 341 case Decl::ImplicitParam: 342 case Decl::ParmVar: 343 case Decl::ObjCTypeParam: 344 return false; 345 } 346 347 llvm_unreachable("Unhandled declaration kind"); 348 } 349 350 bool serialization::needsAnonymousDeclarationNumber(const NamedDecl *D) { 351 // Friend declarations in dependent contexts aren't anonymous in the usual 352 // sense, but they cannot be found by name lookup in their semantic context 353 // (or indeed in any context), so we treat them as anonymous. 354 // 355 // This doesn't apply to friend tag decls; Sema makes those available to name 356 // lookup in the surrounding context. 357 if (D->getFriendObjectKind() && 358 D->getLexicalDeclContext()->isDependentContext() && !isa<TagDecl>(D)) { 359 // For function templates and class templates, the template is numbered and 360 // not its pattern. 361 if (auto *FD = dyn_cast<FunctionDecl>(D)) 362 return !FD->getDescribedFunctionTemplate(); 363 if (auto *RD = dyn_cast<CXXRecordDecl>(D)) 364 return !RD->getDescribedClassTemplate(); 365 return true; 366 } 367 368 // Otherwise, we only care about anonymous class members. 369 if (D->getDeclName() || !isa<CXXRecordDecl>(D->getLexicalDeclContext())) 370 return false; 371 return isa<TagDecl>(D) || isa<FieldDecl>(D); 372 } 373 374