ASTContext.cpp revision 6ebf09130479bc7605aa09a3e6c4dc2ba3513495
1//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 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 implements the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/ASTContext.h" 15#include "CXXABI.h" 16#include "clang/AST/ASTMutationListener.h" 17#include "clang/AST/Attr.h" 18#include "clang/AST/CharUnits.h" 19#include "clang/AST/Comment.h" 20#include "clang/AST/CommentCommandTraits.h" 21#include "clang/AST/DeclCXX.h" 22#include "clang/AST/DeclObjC.h" 23#include "clang/AST/DeclTemplate.h" 24#include "clang/AST/Expr.h" 25#include "clang/AST/ExprCXX.h" 26#include "clang/AST/ExternalASTSource.h" 27#include "clang/AST/Mangle.h" 28#include "clang/AST/RecordLayout.h" 29#include "clang/AST/TypeLoc.h" 30#include "clang/Basic/Builtins.h" 31#include "clang/Basic/SourceManager.h" 32#include "clang/Basic/TargetInfo.h" 33#include "llvm/ADT/SmallString.h" 34#include "llvm/ADT/StringExtras.h" 35#include "llvm/Support/Capacity.h" 36#include "llvm/Support/MathExtras.h" 37#include "llvm/Support/raw_ostream.h" 38#include <map> 39 40using namespace clang; 41 42unsigned ASTContext::NumImplicitDefaultConstructors; 43unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 44unsigned ASTContext::NumImplicitCopyConstructors; 45unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 46unsigned ASTContext::NumImplicitMoveConstructors; 47unsigned ASTContext::NumImplicitMoveConstructorsDeclared; 48unsigned ASTContext::NumImplicitCopyAssignmentOperators; 49unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 50unsigned ASTContext::NumImplicitMoveAssignmentOperators; 51unsigned ASTContext::NumImplicitMoveAssignmentOperatorsDeclared; 52unsigned ASTContext::NumImplicitDestructors; 53unsigned ASTContext::NumImplicitDestructorsDeclared; 54 55enum FloatingRank { 56 HalfRank, FloatRank, DoubleRank, LongDoubleRank 57}; 58 59RawComment *ASTContext::getRawCommentForDeclNoCache(const Decl *D) const { 60 if (!CommentsLoaded && ExternalSource) { 61 ExternalSource->ReadComments(); 62 CommentsLoaded = true; 63 } 64 65 assert(D); 66 67 // User can not attach documentation to implicit declarations. 68 if (D->isImplicit()) 69 return NULL; 70 71 // User can not attach documentation to implicit instantiations. 72 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 73 if (FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) 74 return NULL; 75 } 76 77 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 78 if (VD->isStaticDataMember() && 79 VD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) 80 return NULL; 81 } 82 83 if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(D)) { 84 if (CRD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) 85 return NULL; 86 } 87 88 if (const ClassTemplateSpecializationDecl *CTSD = 89 dyn_cast<ClassTemplateSpecializationDecl>(D)) { 90 TemplateSpecializationKind TSK = CTSD->getSpecializationKind(); 91 if (TSK == TSK_ImplicitInstantiation || 92 TSK == TSK_Undeclared) 93 return NULL; 94 } 95 96 if (const EnumDecl *ED = dyn_cast<EnumDecl>(D)) { 97 if (ED->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) 98 return NULL; 99 } 100 101 // TODO: handle comments for function parameters properly. 102 if (isa<ParmVarDecl>(D)) 103 return NULL; 104 105 // TODO: we could look up template parameter documentation in the template 106 // documentation. 107 if (isa<TemplateTypeParmDecl>(D) || 108 isa<NonTypeTemplateParmDecl>(D) || 109 isa<TemplateTemplateParmDecl>(D)) 110 return NULL; 111 112 ArrayRef<RawComment *> RawComments = Comments.getComments(); 113 114 // If there are no comments anywhere, we won't find anything. 115 if (RawComments.empty()) 116 return NULL; 117 118 // Find declaration location. 119 // For Objective-C declarations we generally don't expect to have multiple 120 // declarators, thus use declaration starting location as the "declaration 121 // location". 122 // For all other declarations multiple declarators are used quite frequently, 123 // so we use the location of the identifier as the "declaration location". 124 SourceLocation DeclLoc; 125 if (isa<ObjCMethodDecl>(D) || isa<ObjCContainerDecl>(D) || 126 isa<ObjCPropertyDecl>(D) || 127 isa<RedeclarableTemplateDecl>(D) || 128 isa<ClassTemplateSpecializationDecl>(D)) 129 DeclLoc = D->getLocStart(); 130 else 131 DeclLoc = D->getLocation(); 132 133 // If the declaration doesn't map directly to a location in a file, we 134 // can't find the comment. 135 if (DeclLoc.isInvalid() || !DeclLoc.isFileID()) 136 return NULL; 137 138 // Find the comment that occurs just after this declaration. 139 ArrayRef<RawComment *>::iterator Comment; 140 { 141 // When searching for comments during parsing, the comment we are looking 142 // for is usually among the last two comments we parsed -- check them 143 // first. 144 RawComment CommentAtDeclLoc(SourceMgr, SourceRange(DeclLoc)); 145 BeforeThanCompare<RawComment> Compare(SourceMgr); 146 ArrayRef<RawComment *>::iterator MaybeBeforeDecl = RawComments.end() - 1; 147 bool Found = Compare(*MaybeBeforeDecl, &CommentAtDeclLoc); 148 if (!Found && RawComments.size() >= 2) { 149 MaybeBeforeDecl--; 150 Found = Compare(*MaybeBeforeDecl, &CommentAtDeclLoc); 151 } 152 153 if (Found) { 154 Comment = MaybeBeforeDecl + 1; 155 assert(Comment == std::lower_bound(RawComments.begin(), RawComments.end(), 156 &CommentAtDeclLoc, Compare)); 157 } else { 158 // Slow path. 159 Comment = std::lower_bound(RawComments.begin(), RawComments.end(), 160 &CommentAtDeclLoc, Compare); 161 } 162 } 163 164 // Decompose the location for the declaration and find the beginning of the 165 // file buffer. 166 std::pair<FileID, unsigned> DeclLocDecomp = SourceMgr.getDecomposedLoc(DeclLoc); 167 168 // First check whether we have a trailing comment. 169 if (Comment != RawComments.end() && 170 (*Comment)->isDocumentation() && (*Comment)->isTrailingComment() && 171 (isa<FieldDecl>(D) || isa<EnumConstantDecl>(D) || isa<VarDecl>(D))) { 172 std::pair<FileID, unsigned> CommentBeginDecomp 173 = SourceMgr.getDecomposedLoc((*Comment)->getSourceRange().getBegin()); 174 // Check that Doxygen trailing comment comes after the declaration, starts 175 // on the same line and in the same file as the declaration. 176 if (DeclLocDecomp.first == CommentBeginDecomp.first && 177 SourceMgr.getLineNumber(DeclLocDecomp.first, DeclLocDecomp.second) 178 == SourceMgr.getLineNumber(CommentBeginDecomp.first, 179 CommentBeginDecomp.second)) { 180 return *Comment; 181 } 182 } 183 184 // The comment just after the declaration was not a trailing comment. 185 // Let's look at the previous comment. 186 if (Comment == RawComments.begin()) 187 return NULL; 188 --Comment; 189 190 // Check that we actually have a non-member Doxygen comment. 191 if (!(*Comment)->isDocumentation() || (*Comment)->isTrailingComment()) 192 return NULL; 193 194 // Decompose the end of the comment. 195 std::pair<FileID, unsigned> CommentEndDecomp 196 = SourceMgr.getDecomposedLoc((*Comment)->getSourceRange().getEnd()); 197 198 // If the comment and the declaration aren't in the same file, then they 199 // aren't related. 200 if (DeclLocDecomp.first != CommentEndDecomp.first) 201 return NULL; 202 203 // Get the corresponding buffer. 204 bool Invalid = false; 205 const char *Buffer = SourceMgr.getBufferData(DeclLocDecomp.first, 206 &Invalid).data(); 207 if (Invalid) 208 return NULL; 209 210 // Extract text between the comment and declaration. 211 StringRef Text(Buffer + CommentEndDecomp.second, 212 DeclLocDecomp.second - CommentEndDecomp.second); 213 214 // There should be no other declarations or preprocessor directives between 215 // comment and declaration. 216 if (Text.find_first_of(",;{}#@") != StringRef::npos) 217 return NULL; 218 219 return *Comment; 220} 221 222namespace { 223/// If we have a 'templated' declaration for a template, adjust 'D' to 224/// refer to the actual template. 225/// If we have an implicit instantiation, adjust 'D' to refer to template. 226const Decl *adjustDeclToTemplate(const Decl *D) { 227 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 228 // Is this function declaration part of a function template? 229 if (const FunctionTemplateDecl *FTD = FD->getDescribedFunctionTemplate()) 230 return FTD; 231 232 // Nothing to do if function is not an implicit instantiation. 233 if (FD->getTemplateSpecializationKind() != TSK_ImplicitInstantiation) 234 return D; 235 236 // Function is an implicit instantiation of a function template? 237 if (const FunctionTemplateDecl *FTD = FD->getPrimaryTemplate()) 238 return FTD; 239 240 // Function is instantiated from a member definition of a class template? 241 if (const FunctionDecl *MemberDecl = 242 FD->getInstantiatedFromMemberFunction()) 243 return MemberDecl; 244 245 return D; 246 } 247 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 248 // Static data member is instantiated from a member definition of a class 249 // template? 250 if (VD->isStaticDataMember()) 251 if (const VarDecl *MemberDecl = VD->getInstantiatedFromStaticDataMember()) 252 return MemberDecl; 253 254 return D; 255 } 256 if (const CXXRecordDecl *CRD = dyn_cast<CXXRecordDecl>(D)) { 257 // Is this class declaration part of a class template? 258 if (const ClassTemplateDecl *CTD = CRD->getDescribedClassTemplate()) 259 return CTD; 260 261 // Class is an implicit instantiation of a class template or partial 262 // specialization? 263 if (const ClassTemplateSpecializationDecl *CTSD = 264 dyn_cast<ClassTemplateSpecializationDecl>(CRD)) { 265 if (CTSD->getSpecializationKind() != TSK_ImplicitInstantiation) 266 return D; 267 llvm::PointerUnion<ClassTemplateDecl *, 268 ClassTemplatePartialSpecializationDecl *> 269 PU = CTSD->getSpecializedTemplateOrPartial(); 270 return PU.is<ClassTemplateDecl*>() ? 271 static_cast<const Decl*>(PU.get<ClassTemplateDecl *>()) : 272 static_cast<const Decl*>( 273 PU.get<ClassTemplatePartialSpecializationDecl *>()); 274 } 275 276 // Class is instantiated from a member definition of a class template? 277 if (const MemberSpecializationInfo *Info = 278 CRD->getMemberSpecializationInfo()) 279 return Info->getInstantiatedFrom(); 280 281 return D; 282 } 283 if (const EnumDecl *ED = dyn_cast<EnumDecl>(D)) { 284 // Enum is instantiated from a member definition of a class template? 285 if (const EnumDecl *MemberDecl = ED->getInstantiatedFromMemberEnum()) 286 return MemberDecl; 287 288 return D; 289 } 290 // FIXME: Adjust alias templates? 291 return D; 292} 293} // unnamed namespace 294 295const RawComment *ASTContext::getRawCommentForAnyRedecl( 296 const Decl *D, 297 const Decl **OriginalDecl) const { 298 D = adjustDeclToTemplate(D); 299 300 // Check whether we have cached a comment for this declaration already. 301 { 302 llvm::DenseMap<const Decl *, RawCommentAndCacheFlags>::iterator Pos = 303 RedeclComments.find(D); 304 if (Pos != RedeclComments.end()) { 305 const RawCommentAndCacheFlags &Raw = Pos->second; 306 if (Raw.getKind() != RawCommentAndCacheFlags::NoCommentInDecl) { 307 if (OriginalDecl) 308 *OriginalDecl = Raw.getOriginalDecl(); 309 return Raw.getRaw(); 310 } 311 } 312 } 313 314 // Search for comments attached to declarations in the redeclaration chain. 315 const RawComment *RC = NULL; 316 const Decl *OriginalDeclForRC = NULL; 317 for (Decl::redecl_iterator I = D->redecls_begin(), 318 E = D->redecls_end(); 319 I != E; ++I) { 320 llvm::DenseMap<const Decl *, RawCommentAndCacheFlags>::iterator Pos = 321 RedeclComments.find(*I); 322 if (Pos != RedeclComments.end()) { 323 const RawCommentAndCacheFlags &Raw = Pos->second; 324 if (Raw.getKind() != RawCommentAndCacheFlags::NoCommentInDecl) { 325 RC = Raw.getRaw(); 326 OriginalDeclForRC = Raw.getOriginalDecl(); 327 break; 328 } 329 } else { 330 RC = getRawCommentForDeclNoCache(*I); 331 OriginalDeclForRC = *I; 332 RawCommentAndCacheFlags Raw; 333 if (RC) { 334 Raw.setRaw(RC); 335 Raw.setKind(RawCommentAndCacheFlags::FromDecl); 336 } else 337 Raw.setKind(RawCommentAndCacheFlags::NoCommentInDecl); 338 Raw.setOriginalDecl(*I); 339 RedeclComments[*I] = Raw; 340 if (RC) 341 break; 342 } 343 } 344 345 // If we found a comment, it should be a documentation comment. 346 assert(!RC || RC->isDocumentation()); 347 348 if (OriginalDecl) 349 *OriginalDecl = OriginalDeclForRC; 350 351 // Update cache for every declaration in the redeclaration chain. 352 RawCommentAndCacheFlags Raw; 353 Raw.setRaw(RC); 354 Raw.setKind(RawCommentAndCacheFlags::FromRedecl); 355 Raw.setOriginalDecl(OriginalDeclForRC); 356 357 for (Decl::redecl_iterator I = D->redecls_begin(), 358 E = D->redecls_end(); 359 I != E; ++I) { 360 RawCommentAndCacheFlags &R = RedeclComments[*I]; 361 if (R.getKind() == RawCommentAndCacheFlags::NoCommentInDecl) 362 R = Raw; 363 } 364 365 return RC; 366} 367 368static void addRedeclaredMethods(const ObjCMethodDecl *ObjCMethod, 369 SmallVectorImpl<const NamedDecl *> &Redeclared) { 370 const DeclContext *DC = ObjCMethod->getDeclContext(); 371 if (const ObjCImplDecl *IMD = dyn_cast<ObjCImplDecl>(DC)) { 372 const ObjCInterfaceDecl *ID = IMD->getClassInterface(); 373 if (!ID) 374 return; 375 // Add redeclared method here. 376 for (ObjCInterfaceDecl::known_extensions_iterator 377 Ext = ID->known_extensions_begin(), 378 ExtEnd = ID->known_extensions_end(); 379 Ext != ExtEnd; ++Ext) { 380 if (ObjCMethodDecl *RedeclaredMethod = 381 Ext->getMethod(ObjCMethod->getSelector(), 382 ObjCMethod->isInstanceMethod())) 383 Redeclared.push_back(RedeclaredMethod); 384 } 385 } 386} 387 388comments::FullComment *ASTContext::cloneFullComment(comments::FullComment *FC, 389 const Decl *D) const { 390 comments::DeclInfo *ThisDeclInfo = new (*this) comments::DeclInfo; 391 ThisDeclInfo->CommentDecl = D; 392 ThisDeclInfo->IsFilled = false; 393 ThisDeclInfo->fill(); 394 ThisDeclInfo->CommentDecl = FC->getDecl(); 395 comments::FullComment *CFC = 396 new (*this) comments::FullComment(FC->getBlocks(), 397 ThisDeclInfo); 398 return CFC; 399 400} 401 402comments::FullComment *ASTContext::getCommentForDecl( 403 const Decl *D, 404 const Preprocessor *PP) const { 405 D = adjustDeclToTemplate(D); 406 407 const Decl *Canonical = D->getCanonicalDecl(); 408 llvm::DenseMap<const Decl *, comments::FullComment *>::iterator Pos = 409 ParsedComments.find(Canonical); 410 411 if (Pos != ParsedComments.end()) { 412 if (Canonical != D) { 413 comments::FullComment *FC = Pos->second; 414 comments::FullComment *CFC = cloneFullComment(FC, D); 415 return CFC; 416 } 417 return Pos->second; 418 } 419 420 const Decl *OriginalDecl; 421 422 const RawComment *RC = getRawCommentForAnyRedecl(D, &OriginalDecl); 423 if (!RC) { 424 if (isa<ObjCMethodDecl>(D) || isa<FunctionDecl>(D)) { 425 SmallVector<const NamedDecl*, 8> Overridden; 426 const ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(D); 427 if (OMD && OMD->isPropertyAccessor()) 428 if (const ObjCPropertyDecl *PDecl = OMD->findPropertyDecl()) 429 if (comments::FullComment *FC = getCommentForDecl(PDecl, PP)) 430 return cloneFullComment(FC, D); 431 if (OMD) 432 addRedeclaredMethods(OMD, Overridden); 433 getOverriddenMethods(dyn_cast<NamedDecl>(D), Overridden); 434 for (unsigned i = 0, e = Overridden.size(); i < e; i++) 435 if (comments::FullComment *FC = getCommentForDecl(Overridden[i], PP)) 436 return cloneFullComment(FC, D); 437 } 438 else if (const TypedefDecl *TD = dyn_cast<TypedefDecl>(D)) { 439 // Attach any tag type's documentation to its typedef if latter 440 // does not have one of its own. 441 QualType QT = TD->getUnderlyingType(); 442 if (const TagType *TT = QT->getAs<TagType>()) 443 if (const Decl *TD = TT->getDecl()) 444 if (comments::FullComment *FC = getCommentForDecl(TD, PP)) 445 return cloneFullComment(FC, D); 446 } 447 return NULL; 448 } 449 450 // If the RawComment was attached to other redeclaration of this Decl, we 451 // should parse the comment in context of that other Decl. This is important 452 // because comments can contain references to parameter names which can be 453 // different across redeclarations. 454 if (D != OriginalDecl) 455 return getCommentForDecl(OriginalDecl, PP); 456 457 comments::FullComment *FC = RC->parse(*this, PP, D); 458 ParsedComments[Canonical] = FC; 459 return FC; 460} 461 462void 463ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 464 TemplateTemplateParmDecl *Parm) { 465 ID.AddInteger(Parm->getDepth()); 466 ID.AddInteger(Parm->getPosition()); 467 ID.AddBoolean(Parm->isParameterPack()); 468 469 TemplateParameterList *Params = Parm->getTemplateParameters(); 470 ID.AddInteger(Params->size()); 471 for (TemplateParameterList::const_iterator P = Params->begin(), 472 PEnd = Params->end(); 473 P != PEnd; ++P) { 474 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 475 ID.AddInteger(0); 476 ID.AddBoolean(TTP->isParameterPack()); 477 continue; 478 } 479 480 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 481 ID.AddInteger(1); 482 ID.AddBoolean(NTTP->isParameterPack()); 483 ID.AddPointer(NTTP->getType().getCanonicalType().getAsOpaquePtr()); 484 if (NTTP->isExpandedParameterPack()) { 485 ID.AddBoolean(true); 486 ID.AddInteger(NTTP->getNumExpansionTypes()); 487 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 488 QualType T = NTTP->getExpansionType(I); 489 ID.AddPointer(T.getCanonicalType().getAsOpaquePtr()); 490 } 491 } else 492 ID.AddBoolean(false); 493 continue; 494 } 495 496 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 497 ID.AddInteger(2); 498 Profile(ID, TTP); 499 } 500} 501 502TemplateTemplateParmDecl * 503ASTContext::getCanonicalTemplateTemplateParmDecl( 504 TemplateTemplateParmDecl *TTP) const { 505 // Check if we already have a canonical template template parameter. 506 llvm::FoldingSetNodeID ID; 507 CanonicalTemplateTemplateParm::Profile(ID, TTP); 508 void *InsertPos = 0; 509 CanonicalTemplateTemplateParm *Canonical 510 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 511 if (Canonical) 512 return Canonical->getParam(); 513 514 // Build a canonical template parameter list. 515 TemplateParameterList *Params = TTP->getTemplateParameters(); 516 SmallVector<NamedDecl *, 4> CanonParams; 517 CanonParams.reserve(Params->size()); 518 for (TemplateParameterList::const_iterator P = Params->begin(), 519 PEnd = Params->end(); 520 P != PEnd; ++P) { 521 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 522 CanonParams.push_back( 523 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 524 SourceLocation(), 525 SourceLocation(), 526 TTP->getDepth(), 527 TTP->getIndex(), 0, false, 528 TTP->isParameterPack())); 529 else if (NonTypeTemplateParmDecl *NTTP 530 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 531 QualType T = getCanonicalType(NTTP->getType()); 532 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 533 NonTypeTemplateParmDecl *Param; 534 if (NTTP->isExpandedParameterPack()) { 535 SmallVector<QualType, 2> ExpandedTypes; 536 SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 537 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 538 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 539 ExpandedTInfos.push_back( 540 getTrivialTypeSourceInfo(ExpandedTypes.back())); 541 } 542 543 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 544 SourceLocation(), 545 SourceLocation(), 546 NTTP->getDepth(), 547 NTTP->getPosition(), 0, 548 T, 549 TInfo, 550 ExpandedTypes.data(), 551 ExpandedTypes.size(), 552 ExpandedTInfos.data()); 553 } else { 554 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 555 SourceLocation(), 556 SourceLocation(), 557 NTTP->getDepth(), 558 NTTP->getPosition(), 0, 559 T, 560 NTTP->isParameterPack(), 561 TInfo); 562 } 563 CanonParams.push_back(Param); 564 565 } else 566 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 567 cast<TemplateTemplateParmDecl>(*P))); 568 } 569 570 TemplateTemplateParmDecl *CanonTTP 571 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 572 SourceLocation(), TTP->getDepth(), 573 TTP->getPosition(), 574 TTP->isParameterPack(), 575 0, 576 TemplateParameterList::Create(*this, SourceLocation(), 577 SourceLocation(), 578 CanonParams.data(), 579 CanonParams.size(), 580 SourceLocation())); 581 582 // Get the new insert position for the node we care about. 583 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 584 assert(Canonical == 0 && "Shouldn't be in the map!"); 585 (void)Canonical; 586 587 // Create the canonical template template parameter entry. 588 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 589 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 590 return CanonTTP; 591} 592 593CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 594 if (!LangOpts.CPlusPlus) return 0; 595 596 switch (T.getCXXABI().getKind()) { 597 case TargetCXXABI::GenericARM: 598 case TargetCXXABI::iOS: 599 return CreateARMCXXABI(*this); 600 case TargetCXXABI::GenericAArch64: // Same as Itanium at this level 601 case TargetCXXABI::GenericItanium: 602 return CreateItaniumCXXABI(*this); 603 case TargetCXXABI::Microsoft: 604 return CreateMicrosoftCXXABI(*this); 605 } 606 llvm_unreachable("Invalid CXXABI type!"); 607} 608 609static const LangAS::Map *getAddressSpaceMap(const TargetInfo &T, 610 const LangOptions &LOpts) { 611 if (LOpts.FakeAddressSpaceMap) { 612 // The fake address space map must have a distinct entry for each 613 // language-specific address space. 614 static const unsigned FakeAddrSpaceMap[] = { 615 1, // opencl_global 616 2, // opencl_local 617 3, // opencl_constant 618 4, // cuda_device 619 5, // cuda_constant 620 6 // cuda_shared 621 }; 622 return &FakeAddrSpaceMap; 623 } else { 624 return &T.getAddressSpaceMap(); 625 } 626} 627 628ASTContext::ASTContext(LangOptions& LOpts, SourceManager &SM, 629 const TargetInfo *t, 630 IdentifierTable &idents, SelectorTable &sels, 631 Builtin::Context &builtins, 632 unsigned size_reserve, 633 bool DelayInitialization) 634 : FunctionProtoTypes(this_()), 635 TemplateSpecializationTypes(this_()), 636 DependentTemplateSpecializationTypes(this_()), 637 SubstTemplateTemplateParmPacks(this_()), 638 GlobalNestedNameSpecifier(0), 639 Int128Decl(0), UInt128Decl(0), 640 BuiltinVaListDecl(0), 641 ObjCIdDecl(0), ObjCSelDecl(0), ObjCClassDecl(0), ObjCProtocolClassDecl(0), 642 BOOLDecl(0), 643 CFConstantStringTypeDecl(0), ObjCInstanceTypeDecl(0), 644 FILEDecl(0), 645 jmp_bufDecl(0), sigjmp_bufDecl(0), ucontext_tDecl(0), 646 BlockDescriptorType(0), BlockDescriptorExtendedType(0), 647 cudaConfigureCallDecl(0), 648 NullTypeSourceInfo(QualType()), 649 FirstLocalImport(), LastLocalImport(), 650 SourceMgr(SM), LangOpts(LOpts), 651 AddrSpaceMap(0), Target(t), PrintingPolicy(LOpts), 652 Idents(idents), Selectors(sels), 653 BuiltinInfo(builtins), 654 DeclarationNames(*this), 655 ExternalSource(0), Listener(0), 656 Comments(SM), CommentsLoaded(false), 657 CommentCommandTraits(BumpAlloc, LOpts.CommentOpts), 658 LastSDM(0, 0), 659 UniqueBlockByRefTypeID(0) 660{ 661 if (size_reserve > 0) Types.reserve(size_reserve); 662 TUDecl = TranslationUnitDecl::Create(*this); 663 664 if (!DelayInitialization) { 665 assert(t && "No target supplied for ASTContext initialization"); 666 InitBuiltinTypes(*t); 667 } 668} 669 670ASTContext::~ASTContext() { 671 // Release the DenseMaps associated with DeclContext objects. 672 // FIXME: Is this the ideal solution? 673 ReleaseDeclContextMaps(); 674 675 // Call all of the deallocation functions. 676 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 677 Deallocations[I].first(Deallocations[I].second); 678 679 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 680 // because they can contain DenseMaps. 681 for (llvm::DenseMap<const ObjCContainerDecl*, 682 const ASTRecordLayout*>::iterator 683 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 684 // Increment in loop to prevent using deallocated memory. 685 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 686 R->Destroy(*this); 687 688 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 689 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 690 // Increment in loop to prevent using deallocated memory. 691 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 692 R->Destroy(*this); 693 } 694 695 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 696 AEnd = DeclAttrs.end(); 697 A != AEnd; ++A) 698 A->second->~AttrVec(); 699} 700 701void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 702 Deallocations.push_back(std::make_pair(Callback, Data)); 703} 704 705void 706ASTContext::setExternalSource(OwningPtr<ExternalASTSource> &Source) { 707 ExternalSource.reset(Source.take()); 708} 709 710void ASTContext::PrintStats() const { 711 llvm::errs() << "\n*** AST Context Stats:\n"; 712 llvm::errs() << " " << Types.size() << " types total.\n"; 713 714 unsigned counts[] = { 715#define TYPE(Name, Parent) 0, 716#define ABSTRACT_TYPE(Name, Parent) 717#include "clang/AST/TypeNodes.def" 718 0 // Extra 719 }; 720 721 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 722 Type *T = Types[i]; 723 counts[(unsigned)T->getTypeClass()]++; 724 } 725 726 unsigned Idx = 0; 727 unsigned TotalBytes = 0; 728#define TYPE(Name, Parent) \ 729 if (counts[Idx]) \ 730 llvm::errs() << " " << counts[Idx] << " " << #Name \ 731 << " types\n"; \ 732 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 733 ++Idx; 734#define ABSTRACT_TYPE(Name, Parent) 735#include "clang/AST/TypeNodes.def" 736 737 llvm::errs() << "Total bytes = " << TotalBytes << "\n"; 738 739 // Implicit special member functions. 740 llvm::errs() << NumImplicitDefaultConstructorsDeclared << "/" 741 << NumImplicitDefaultConstructors 742 << " implicit default constructors created\n"; 743 llvm::errs() << NumImplicitCopyConstructorsDeclared << "/" 744 << NumImplicitCopyConstructors 745 << " implicit copy constructors created\n"; 746 if (getLangOpts().CPlusPlus) 747 llvm::errs() << NumImplicitMoveConstructorsDeclared << "/" 748 << NumImplicitMoveConstructors 749 << " implicit move constructors created\n"; 750 llvm::errs() << NumImplicitCopyAssignmentOperatorsDeclared << "/" 751 << NumImplicitCopyAssignmentOperators 752 << " implicit copy assignment operators created\n"; 753 if (getLangOpts().CPlusPlus) 754 llvm::errs() << NumImplicitMoveAssignmentOperatorsDeclared << "/" 755 << NumImplicitMoveAssignmentOperators 756 << " implicit move assignment operators created\n"; 757 llvm::errs() << NumImplicitDestructorsDeclared << "/" 758 << NumImplicitDestructors 759 << " implicit destructors created\n"; 760 761 if (ExternalSource.get()) { 762 llvm::errs() << "\n"; 763 ExternalSource->PrintStats(); 764 } 765 766 BumpAlloc.PrintStats(); 767} 768 769TypedefDecl *ASTContext::getInt128Decl() const { 770 if (!Int128Decl) { 771 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(Int128Ty); 772 Int128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 773 getTranslationUnitDecl(), 774 SourceLocation(), 775 SourceLocation(), 776 &Idents.get("__int128_t"), 777 TInfo); 778 } 779 780 return Int128Decl; 781} 782 783TypedefDecl *ASTContext::getUInt128Decl() const { 784 if (!UInt128Decl) { 785 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(UnsignedInt128Ty); 786 UInt128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 787 getTranslationUnitDecl(), 788 SourceLocation(), 789 SourceLocation(), 790 &Idents.get("__uint128_t"), 791 TInfo); 792 } 793 794 return UInt128Decl; 795} 796 797void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 798 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 799 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 800 Types.push_back(Ty); 801} 802 803void ASTContext::InitBuiltinTypes(const TargetInfo &Target) { 804 assert((!this->Target || this->Target == &Target) && 805 "Incorrect target reinitialization"); 806 assert(VoidTy.isNull() && "Context reinitialized?"); 807 808 this->Target = &Target; 809 810 ABI.reset(createCXXABI(Target)); 811 AddrSpaceMap = getAddressSpaceMap(Target, LangOpts); 812 813 // C99 6.2.5p19. 814 InitBuiltinType(VoidTy, BuiltinType::Void); 815 816 // C99 6.2.5p2. 817 InitBuiltinType(BoolTy, BuiltinType::Bool); 818 // C99 6.2.5p3. 819 if (LangOpts.CharIsSigned) 820 InitBuiltinType(CharTy, BuiltinType::Char_S); 821 else 822 InitBuiltinType(CharTy, BuiltinType::Char_U); 823 // C99 6.2.5p4. 824 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 825 InitBuiltinType(ShortTy, BuiltinType::Short); 826 InitBuiltinType(IntTy, BuiltinType::Int); 827 InitBuiltinType(LongTy, BuiltinType::Long); 828 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 829 830 // C99 6.2.5p6. 831 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 832 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 833 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 834 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 835 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 836 837 // C99 6.2.5p10. 838 InitBuiltinType(FloatTy, BuiltinType::Float); 839 InitBuiltinType(DoubleTy, BuiltinType::Double); 840 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 841 842 // GNU extension, 128-bit integers. 843 InitBuiltinType(Int128Ty, BuiltinType::Int128); 844 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 845 846 if (LangOpts.CPlusPlus && LangOpts.WChar) { // C++ 3.9.1p5 847 if (TargetInfo::isTypeSigned(Target.getWCharType())) 848 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 849 else // -fshort-wchar makes wchar_t be unsigned. 850 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 851 } else // C99 (or C++ using -fno-wchar) 852 WCharTy = getFromTargetType(Target.getWCharType()); 853 854 WIntTy = getFromTargetType(Target.getWIntType()); 855 856 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 857 InitBuiltinType(Char16Ty, BuiltinType::Char16); 858 else // C99 859 Char16Ty = getFromTargetType(Target.getChar16Type()); 860 861 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 862 InitBuiltinType(Char32Ty, BuiltinType::Char32); 863 else // C99 864 Char32Ty = getFromTargetType(Target.getChar32Type()); 865 866 // Placeholder type for type-dependent expressions whose type is 867 // completely unknown. No code should ever check a type against 868 // DependentTy and users should never see it; however, it is here to 869 // help diagnose failures to properly check for type-dependent 870 // expressions. 871 InitBuiltinType(DependentTy, BuiltinType::Dependent); 872 873 // Placeholder type for functions. 874 InitBuiltinType(OverloadTy, BuiltinType::Overload); 875 876 // Placeholder type for bound members. 877 InitBuiltinType(BoundMemberTy, BuiltinType::BoundMember); 878 879 // Placeholder type for pseudo-objects. 880 InitBuiltinType(PseudoObjectTy, BuiltinType::PseudoObject); 881 882 // "any" type; useful for debugger-like clients. 883 InitBuiltinType(UnknownAnyTy, BuiltinType::UnknownAny); 884 885 // Placeholder type for unbridged ARC casts. 886 InitBuiltinType(ARCUnbridgedCastTy, BuiltinType::ARCUnbridgedCast); 887 888 // Placeholder type for builtin functions. 889 InitBuiltinType(BuiltinFnTy, BuiltinType::BuiltinFn); 890 891 // C99 6.2.5p11. 892 FloatComplexTy = getComplexType(FloatTy); 893 DoubleComplexTy = getComplexType(DoubleTy); 894 LongDoubleComplexTy = getComplexType(LongDoubleTy); 895 896 // Builtin types for 'id', 'Class', and 'SEL'. 897 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 898 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 899 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 900 901 if (LangOpts.OpenCL) { 902 InitBuiltinType(OCLImage1dTy, BuiltinType::OCLImage1d); 903 InitBuiltinType(OCLImage1dArrayTy, BuiltinType::OCLImage1dArray); 904 InitBuiltinType(OCLImage1dBufferTy, BuiltinType::OCLImage1dBuffer); 905 InitBuiltinType(OCLImage2dTy, BuiltinType::OCLImage2d); 906 InitBuiltinType(OCLImage2dArrayTy, BuiltinType::OCLImage2dArray); 907 InitBuiltinType(OCLImage3dTy, BuiltinType::OCLImage3d); 908 909 InitBuiltinType(OCLSamplerTy, BuiltinType::OCLSampler); 910 InitBuiltinType(OCLEventTy, BuiltinType::OCLEvent); 911 } 912 913 // Builtin type for __objc_yes and __objc_no 914 ObjCBuiltinBoolTy = (Target.useSignedCharForObjCBool() ? 915 SignedCharTy : BoolTy); 916 917 ObjCConstantStringType = QualType(); 918 919 ObjCSuperType = QualType(); 920 921 // void * type 922 VoidPtrTy = getPointerType(VoidTy); 923 924 // nullptr type (C++0x 2.14.7) 925 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 926 927 // half type (OpenCL 6.1.1.1) / ARM NEON __fp16 928 InitBuiltinType(HalfTy, BuiltinType::Half); 929 930 // Builtin type used to help define __builtin_va_list. 931 VaListTagTy = QualType(); 932} 933 934DiagnosticsEngine &ASTContext::getDiagnostics() const { 935 return SourceMgr.getDiagnostics(); 936} 937 938AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 939 AttrVec *&Result = DeclAttrs[D]; 940 if (!Result) { 941 void *Mem = Allocate(sizeof(AttrVec)); 942 Result = new (Mem) AttrVec; 943 } 944 945 return *Result; 946} 947 948/// \brief Erase the attributes corresponding to the given declaration. 949void ASTContext::eraseDeclAttrs(const Decl *D) { 950 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 951 if (Pos != DeclAttrs.end()) { 952 Pos->second->~AttrVec(); 953 DeclAttrs.erase(Pos); 954 } 955} 956 957MemberSpecializationInfo * 958ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 959 assert(Var->isStaticDataMember() && "Not a static data member"); 960 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 961 = InstantiatedFromStaticDataMember.find(Var); 962 if (Pos == InstantiatedFromStaticDataMember.end()) 963 return 0; 964 965 return Pos->second; 966} 967 968void 969ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 970 TemplateSpecializationKind TSK, 971 SourceLocation PointOfInstantiation) { 972 assert(Inst->isStaticDataMember() && "Not a static data member"); 973 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 974 assert(!InstantiatedFromStaticDataMember[Inst] && 975 "Already noted what static data member was instantiated from"); 976 InstantiatedFromStaticDataMember[Inst] 977 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 978} 979 980FunctionDecl *ASTContext::getClassScopeSpecializationPattern( 981 const FunctionDecl *FD){ 982 assert(FD && "Specialization is 0"); 983 llvm::DenseMap<const FunctionDecl*, FunctionDecl *>::const_iterator Pos 984 = ClassScopeSpecializationPattern.find(FD); 985 if (Pos == ClassScopeSpecializationPattern.end()) 986 return 0; 987 988 return Pos->second; 989} 990 991void ASTContext::setClassScopeSpecializationPattern(FunctionDecl *FD, 992 FunctionDecl *Pattern) { 993 assert(FD && "Specialization is 0"); 994 assert(Pattern && "Class scope specialization pattern is 0"); 995 ClassScopeSpecializationPattern[FD] = Pattern; 996} 997 998NamedDecl * 999ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 1000 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 1001 = InstantiatedFromUsingDecl.find(UUD); 1002 if (Pos == InstantiatedFromUsingDecl.end()) 1003 return 0; 1004 1005 return Pos->second; 1006} 1007 1008void 1009ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 1010 assert((isa<UsingDecl>(Pattern) || 1011 isa<UnresolvedUsingValueDecl>(Pattern) || 1012 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 1013 "pattern decl is not a using decl"); 1014 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 1015 InstantiatedFromUsingDecl[Inst] = Pattern; 1016} 1017 1018UsingShadowDecl * 1019ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 1020 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 1021 = InstantiatedFromUsingShadowDecl.find(Inst); 1022 if (Pos == InstantiatedFromUsingShadowDecl.end()) 1023 return 0; 1024 1025 return Pos->second; 1026} 1027 1028void 1029ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 1030 UsingShadowDecl *Pattern) { 1031 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 1032 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 1033} 1034 1035FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 1036 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 1037 = InstantiatedFromUnnamedFieldDecl.find(Field); 1038 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 1039 return 0; 1040 1041 return Pos->second; 1042} 1043 1044void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 1045 FieldDecl *Tmpl) { 1046 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 1047 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 1048 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 1049 "Already noted what unnamed field was instantiated from"); 1050 1051 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 1052} 1053 1054bool ASTContext::ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 1055 const FieldDecl *LastFD) const { 1056 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 1057 FD->getBitWidthValue(*this) == 0); 1058} 1059 1060bool ASTContext::ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 1061 const FieldDecl *LastFD) const { 1062 return (FD->isBitField() && LastFD && LastFD->isBitField() && 1063 FD->getBitWidthValue(*this) == 0 && 1064 LastFD->getBitWidthValue(*this) != 0); 1065} 1066 1067bool ASTContext::BitfieldFollowsBitfield(const FieldDecl *FD, 1068 const FieldDecl *LastFD) const { 1069 return (FD->isBitField() && LastFD && LastFD->isBitField() && 1070 FD->getBitWidthValue(*this) && 1071 LastFD->getBitWidthValue(*this)); 1072} 1073 1074bool ASTContext::NonBitfieldFollowsBitfield(const FieldDecl *FD, 1075 const FieldDecl *LastFD) const { 1076 return (!FD->isBitField() && LastFD && LastFD->isBitField() && 1077 LastFD->getBitWidthValue(*this)); 1078} 1079 1080bool ASTContext::BitfieldFollowsNonBitfield(const FieldDecl *FD, 1081 const FieldDecl *LastFD) const { 1082 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 1083 FD->getBitWidthValue(*this)); 1084} 1085 1086ASTContext::overridden_cxx_method_iterator 1087ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 1088 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 1089 = OverriddenMethods.find(Method->getCanonicalDecl()); 1090 if (Pos == OverriddenMethods.end()) 1091 return 0; 1092 1093 return Pos->second.begin(); 1094} 1095 1096ASTContext::overridden_cxx_method_iterator 1097ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 1098 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 1099 = OverriddenMethods.find(Method->getCanonicalDecl()); 1100 if (Pos == OverriddenMethods.end()) 1101 return 0; 1102 1103 return Pos->second.end(); 1104} 1105 1106unsigned 1107ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 1108 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 1109 = OverriddenMethods.find(Method->getCanonicalDecl()); 1110 if (Pos == OverriddenMethods.end()) 1111 return 0; 1112 1113 return Pos->second.size(); 1114} 1115 1116void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 1117 const CXXMethodDecl *Overridden) { 1118 assert(Method->isCanonicalDecl() && Overridden->isCanonicalDecl()); 1119 OverriddenMethods[Method].push_back(Overridden); 1120} 1121 1122void ASTContext::getOverriddenMethods( 1123 const NamedDecl *D, 1124 SmallVectorImpl<const NamedDecl *> &Overridden) const { 1125 assert(D); 1126 1127 if (const CXXMethodDecl *CXXMethod = dyn_cast<CXXMethodDecl>(D)) { 1128 Overridden.append(CXXMethod->begin_overridden_methods(), 1129 CXXMethod->end_overridden_methods()); 1130 return; 1131 } 1132 1133 const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D); 1134 if (!Method) 1135 return; 1136 1137 SmallVector<const ObjCMethodDecl *, 8> OverDecls; 1138 Method->getOverriddenMethods(OverDecls); 1139 Overridden.append(OverDecls.begin(), OverDecls.end()); 1140} 1141 1142void ASTContext::addedLocalImportDecl(ImportDecl *Import) { 1143 assert(!Import->NextLocalImport && "Import declaration already in the chain"); 1144 assert(!Import->isFromASTFile() && "Non-local import declaration"); 1145 if (!FirstLocalImport) { 1146 FirstLocalImport = Import; 1147 LastLocalImport = Import; 1148 return; 1149 } 1150 1151 LastLocalImport->NextLocalImport = Import; 1152 LastLocalImport = Import; 1153} 1154 1155//===----------------------------------------------------------------------===// 1156// Type Sizing and Analysis 1157//===----------------------------------------------------------------------===// 1158 1159/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 1160/// scalar floating point type. 1161const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 1162 const BuiltinType *BT = T->getAs<BuiltinType>(); 1163 assert(BT && "Not a floating point type!"); 1164 switch (BT->getKind()) { 1165 default: llvm_unreachable("Not a floating point type!"); 1166 case BuiltinType::Half: return Target->getHalfFormat(); 1167 case BuiltinType::Float: return Target->getFloatFormat(); 1168 case BuiltinType::Double: return Target->getDoubleFormat(); 1169 case BuiltinType::LongDouble: return Target->getLongDoubleFormat(); 1170 } 1171} 1172 1173/// getDeclAlign - Return a conservative estimate of the alignment of the 1174/// specified decl. Note that bitfields do not have a valid alignment, so 1175/// this method will assert on them. 1176/// If @p RefAsPointee, references are treated like their underlying type 1177/// (for alignof), else they're treated like pointers (for CodeGen). 1178CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 1179 unsigned Align = Target->getCharWidth(); 1180 1181 bool UseAlignAttrOnly = false; 1182 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 1183 Align = AlignFromAttr; 1184 1185 // __attribute__((aligned)) can increase or decrease alignment 1186 // *except* on a struct or struct member, where it only increases 1187 // alignment unless 'packed' is also specified. 1188 // 1189 // It is an error for alignas to decrease alignment, so we can 1190 // ignore that possibility; Sema should diagnose it. 1191 if (isa<FieldDecl>(D)) { 1192 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 1193 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 1194 } else { 1195 UseAlignAttrOnly = true; 1196 } 1197 } 1198 else if (isa<FieldDecl>(D)) 1199 UseAlignAttrOnly = 1200 D->hasAttr<PackedAttr>() || 1201 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 1202 1203 // If we're using the align attribute only, just ignore everything 1204 // else about the declaration and its type. 1205 if (UseAlignAttrOnly) { 1206 // do nothing 1207 1208 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 1209 QualType T = VD->getType(); 1210 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 1211 if (RefAsPointee) 1212 T = RT->getPointeeType(); 1213 else 1214 T = getPointerType(RT->getPointeeType()); 1215 } 1216 if (!T->isIncompleteType() && !T->isFunctionType()) { 1217 // Adjust alignments of declarations with array type by the 1218 // large-array alignment on the target. 1219 unsigned MinWidth = Target->getLargeArrayMinWidth(); 1220 const ArrayType *arrayType; 1221 if (MinWidth && (arrayType = getAsArrayType(T))) { 1222 if (isa<VariableArrayType>(arrayType)) 1223 Align = std::max(Align, Target->getLargeArrayAlign()); 1224 else if (isa<ConstantArrayType>(arrayType) && 1225 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 1226 Align = std::max(Align, Target->getLargeArrayAlign()); 1227 1228 // Walk through any array types while we're at it. 1229 T = getBaseElementType(arrayType); 1230 } 1231 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 1232 } 1233 1234 // Fields can be subject to extra alignment constraints, like if 1235 // the field is packed, the struct is packed, or the struct has a 1236 // a max-field-alignment constraint (#pragma pack). So calculate 1237 // the actual alignment of the field within the struct, and then 1238 // (as we're expected to) constrain that by the alignment of the type. 1239 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 1240 // So calculate the alignment of the field. 1241 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 1242 1243 // Start with the record's overall alignment. 1244 unsigned fieldAlign = toBits(layout.getAlignment()); 1245 1246 // Use the GCD of that and the offset within the record. 1247 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 1248 if (offset > 0) { 1249 // Alignment is always a power of 2, so the GCD will be a power of 2, 1250 // which means we get to do this crazy thing instead of Euclid's. 1251 uint64_t lowBitOfOffset = offset & (~offset + 1); 1252 if (lowBitOfOffset < fieldAlign) 1253 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 1254 } 1255 1256 Align = std::min(Align, fieldAlign); 1257 } 1258 } 1259 1260 return toCharUnitsFromBits(Align); 1261} 1262 1263// getTypeInfoDataSizeInChars - Return the size of a type, in 1264// chars. If the type is a record, its data size is returned. This is 1265// the size of the memcpy that's performed when assigning this type 1266// using a trivial copy/move assignment operator. 1267std::pair<CharUnits, CharUnits> 1268ASTContext::getTypeInfoDataSizeInChars(QualType T) const { 1269 std::pair<CharUnits, CharUnits> sizeAndAlign = getTypeInfoInChars(T); 1270 1271 // In C++, objects can sometimes be allocated into the tail padding 1272 // of a base-class subobject. We decide whether that's possible 1273 // during class layout, so here we can just trust the layout results. 1274 if (getLangOpts().CPlusPlus) { 1275 if (const RecordType *RT = T->getAs<RecordType>()) { 1276 const ASTRecordLayout &layout = getASTRecordLayout(RT->getDecl()); 1277 sizeAndAlign.first = layout.getDataSize(); 1278 } 1279 } 1280 1281 return sizeAndAlign; 1282} 1283 1284std::pair<CharUnits, CharUnits> 1285ASTContext::getTypeInfoInChars(const Type *T) const { 1286 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 1287 return std::make_pair(toCharUnitsFromBits(Info.first), 1288 toCharUnitsFromBits(Info.second)); 1289} 1290 1291std::pair<CharUnits, CharUnits> 1292ASTContext::getTypeInfoInChars(QualType T) const { 1293 return getTypeInfoInChars(T.getTypePtr()); 1294} 1295 1296std::pair<uint64_t, unsigned> ASTContext::getTypeInfo(const Type *T) const { 1297 TypeInfoMap::iterator it = MemoizedTypeInfo.find(T); 1298 if (it != MemoizedTypeInfo.end()) 1299 return it->second; 1300 1301 std::pair<uint64_t, unsigned> Info = getTypeInfoImpl(T); 1302 MemoizedTypeInfo.insert(std::make_pair(T, Info)); 1303 return Info; 1304} 1305 1306/// getTypeInfoImpl - Return the size of the specified type, in bits. This 1307/// method does not work on incomplete types. 1308/// 1309/// FIXME: Pointers into different addr spaces could have different sizes and 1310/// alignment requirements: getPointerInfo should take an AddrSpace, this 1311/// should take a QualType, &c. 1312std::pair<uint64_t, unsigned> 1313ASTContext::getTypeInfoImpl(const Type *T) const { 1314 uint64_t Width=0; 1315 unsigned Align=8; 1316 switch (T->getTypeClass()) { 1317#define TYPE(Class, Base) 1318#define ABSTRACT_TYPE(Class, Base) 1319#define NON_CANONICAL_TYPE(Class, Base) 1320#define DEPENDENT_TYPE(Class, Base) case Type::Class: 1321#include "clang/AST/TypeNodes.def" 1322 llvm_unreachable("Should not see dependent types"); 1323 1324 case Type::FunctionNoProto: 1325 case Type::FunctionProto: 1326 // GCC extension: alignof(function) = 32 bits 1327 Width = 0; 1328 Align = 32; 1329 break; 1330 1331 case Type::IncompleteArray: 1332 case Type::VariableArray: 1333 Width = 0; 1334 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 1335 break; 1336 1337 case Type::ConstantArray: { 1338 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 1339 1340 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 1341 uint64_t Size = CAT->getSize().getZExtValue(); 1342 assert((Size == 0 || EltInfo.first <= (uint64_t)(-1)/Size) && 1343 "Overflow in array type bit size evaluation"); 1344 Width = EltInfo.first*Size; 1345 Align = EltInfo.second; 1346 Width = llvm::RoundUpToAlignment(Width, Align); 1347 break; 1348 } 1349 case Type::ExtVector: 1350 case Type::Vector: { 1351 const VectorType *VT = cast<VectorType>(T); 1352 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 1353 Width = EltInfo.first*VT->getNumElements(); 1354 Align = Width; 1355 // If the alignment is not a power of 2, round up to the next power of 2. 1356 // This happens for non-power-of-2 length vectors. 1357 if (Align & (Align-1)) { 1358 Align = llvm::NextPowerOf2(Align); 1359 Width = llvm::RoundUpToAlignment(Width, Align); 1360 } 1361 // Adjust the alignment based on the target max. 1362 uint64_t TargetVectorAlign = Target->getMaxVectorAlign(); 1363 if (TargetVectorAlign && TargetVectorAlign < Align) 1364 Align = TargetVectorAlign; 1365 break; 1366 } 1367 1368 case Type::Builtin: 1369 switch (cast<BuiltinType>(T)->getKind()) { 1370 default: llvm_unreachable("Unknown builtin type!"); 1371 case BuiltinType::Void: 1372 // GCC extension: alignof(void) = 8 bits. 1373 Width = 0; 1374 Align = 8; 1375 break; 1376 1377 case BuiltinType::Bool: 1378 Width = Target->getBoolWidth(); 1379 Align = Target->getBoolAlign(); 1380 break; 1381 case BuiltinType::Char_S: 1382 case BuiltinType::Char_U: 1383 case BuiltinType::UChar: 1384 case BuiltinType::SChar: 1385 Width = Target->getCharWidth(); 1386 Align = Target->getCharAlign(); 1387 break; 1388 case BuiltinType::WChar_S: 1389 case BuiltinType::WChar_U: 1390 Width = Target->getWCharWidth(); 1391 Align = Target->getWCharAlign(); 1392 break; 1393 case BuiltinType::Char16: 1394 Width = Target->getChar16Width(); 1395 Align = Target->getChar16Align(); 1396 break; 1397 case BuiltinType::Char32: 1398 Width = Target->getChar32Width(); 1399 Align = Target->getChar32Align(); 1400 break; 1401 case BuiltinType::UShort: 1402 case BuiltinType::Short: 1403 Width = Target->getShortWidth(); 1404 Align = Target->getShortAlign(); 1405 break; 1406 case BuiltinType::UInt: 1407 case BuiltinType::Int: 1408 Width = Target->getIntWidth(); 1409 Align = Target->getIntAlign(); 1410 break; 1411 case BuiltinType::ULong: 1412 case BuiltinType::Long: 1413 Width = Target->getLongWidth(); 1414 Align = Target->getLongAlign(); 1415 break; 1416 case BuiltinType::ULongLong: 1417 case BuiltinType::LongLong: 1418 Width = Target->getLongLongWidth(); 1419 Align = Target->getLongLongAlign(); 1420 break; 1421 case BuiltinType::Int128: 1422 case BuiltinType::UInt128: 1423 Width = 128; 1424 Align = 128; // int128_t is 128-bit aligned on all targets. 1425 break; 1426 case BuiltinType::Half: 1427 Width = Target->getHalfWidth(); 1428 Align = Target->getHalfAlign(); 1429 break; 1430 case BuiltinType::Float: 1431 Width = Target->getFloatWidth(); 1432 Align = Target->getFloatAlign(); 1433 break; 1434 case BuiltinType::Double: 1435 Width = Target->getDoubleWidth(); 1436 Align = Target->getDoubleAlign(); 1437 break; 1438 case BuiltinType::LongDouble: 1439 Width = Target->getLongDoubleWidth(); 1440 Align = Target->getLongDoubleAlign(); 1441 break; 1442 case BuiltinType::NullPtr: 1443 Width = Target->getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 1444 Align = Target->getPointerAlign(0); // == sizeof(void*) 1445 break; 1446 case BuiltinType::ObjCId: 1447 case BuiltinType::ObjCClass: 1448 case BuiltinType::ObjCSel: 1449 Width = Target->getPointerWidth(0); 1450 Align = Target->getPointerAlign(0); 1451 break; 1452 case BuiltinType::OCLSampler: 1453 // Samplers are modeled as integers. 1454 Width = Target->getIntWidth(); 1455 Align = Target->getIntAlign(); 1456 break; 1457 case BuiltinType::OCLEvent: 1458 case BuiltinType::OCLImage1d: 1459 case BuiltinType::OCLImage1dArray: 1460 case BuiltinType::OCLImage1dBuffer: 1461 case BuiltinType::OCLImage2d: 1462 case BuiltinType::OCLImage2dArray: 1463 case BuiltinType::OCLImage3d: 1464 // Currently these types are pointers to opaque types. 1465 Width = Target->getPointerWidth(0); 1466 Align = Target->getPointerAlign(0); 1467 break; 1468 } 1469 break; 1470 case Type::ObjCObjectPointer: 1471 Width = Target->getPointerWidth(0); 1472 Align = Target->getPointerAlign(0); 1473 break; 1474 case Type::BlockPointer: { 1475 unsigned AS = getTargetAddressSpace( 1476 cast<BlockPointerType>(T)->getPointeeType()); 1477 Width = Target->getPointerWidth(AS); 1478 Align = Target->getPointerAlign(AS); 1479 break; 1480 } 1481 case Type::LValueReference: 1482 case Type::RValueReference: { 1483 // alignof and sizeof should never enter this code path here, so we go 1484 // the pointer route. 1485 unsigned AS = getTargetAddressSpace( 1486 cast<ReferenceType>(T)->getPointeeType()); 1487 Width = Target->getPointerWidth(AS); 1488 Align = Target->getPointerAlign(AS); 1489 break; 1490 } 1491 case Type::Pointer: { 1492 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType()); 1493 Width = Target->getPointerWidth(AS); 1494 Align = Target->getPointerAlign(AS); 1495 break; 1496 } 1497 case Type::MemberPointer: { 1498 const MemberPointerType *MPT = cast<MemberPointerType>(T); 1499 std::pair<uint64_t, unsigned> PtrDiffInfo = 1500 getTypeInfo(getPointerDiffType()); 1501 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 1502 Align = PtrDiffInfo.second; 1503 break; 1504 } 1505 case Type::Complex: { 1506 // Complex types have the same alignment as their elements, but twice the 1507 // size. 1508 std::pair<uint64_t, unsigned> EltInfo = 1509 getTypeInfo(cast<ComplexType>(T)->getElementType()); 1510 Width = EltInfo.first*2; 1511 Align = EltInfo.second; 1512 break; 1513 } 1514 case Type::ObjCObject: 1515 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 1516 case Type::ObjCInterface: { 1517 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 1518 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 1519 Width = toBits(Layout.getSize()); 1520 Align = toBits(Layout.getAlignment()); 1521 break; 1522 } 1523 case Type::Record: 1524 case Type::Enum: { 1525 const TagType *TT = cast<TagType>(T); 1526 1527 if (TT->getDecl()->isInvalidDecl()) { 1528 Width = 8; 1529 Align = 8; 1530 break; 1531 } 1532 1533 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 1534 return getTypeInfo(ET->getDecl()->getIntegerType()); 1535 1536 const RecordType *RT = cast<RecordType>(TT); 1537 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 1538 Width = toBits(Layout.getSize()); 1539 Align = toBits(Layout.getAlignment()); 1540 break; 1541 } 1542 1543 case Type::SubstTemplateTypeParm: 1544 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 1545 getReplacementType().getTypePtr()); 1546 1547 case Type::Auto: { 1548 const AutoType *A = cast<AutoType>(T); 1549 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 1550 return getTypeInfo(A->getDeducedType().getTypePtr()); 1551 } 1552 1553 case Type::Paren: 1554 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 1555 1556 case Type::Typedef: { 1557 const TypedefNameDecl *Typedef = cast<TypedefType>(T)->getDecl(); 1558 std::pair<uint64_t, unsigned> Info 1559 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 1560 // If the typedef has an aligned attribute on it, it overrides any computed 1561 // alignment we have. This violates the GCC documentation (which says that 1562 // attribute(aligned) can only round up) but matches its implementation. 1563 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 1564 Align = AttrAlign; 1565 else 1566 Align = Info.second; 1567 Width = Info.first; 1568 break; 1569 } 1570 1571 case Type::TypeOfExpr: 1572 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 1573 .getTypePtr()); 1574 1575 case Type::TypeOf: 1576 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 1577 1578 case Type::Decltype: 1579 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 1580 .getTypePtr()); 1581 1582 case Type::UnaryTransform: 1583 return getTypeInfo(cast<UnaryTransformType>(T)->getUnderlyingType()); 1584 1585 case Type::Elaborated: 1586 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 1587 1588 case Type::Attributed: 1589 return getTypeInfo( 1590 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 1591 1592 case Type::TemplateSpecialization: { 1593 assert(getCanonicalType(T) != T && 1594 "Cannot request the size of a dependent type"); 1595 const TemplateSpecializationType *TST = cast<TemplateSpecializationType>(T); 1596 // A type alias template specialization may refer to a typedef with the 1597 // aligned attribute on it. 1598 if (TST->isTypeAlias()) 1599 return getTypeInfo(TST->getAliasedType().getTypePtr()); 1600 else 1601 return getTypeInfo(getCanonicalType(T)); 1602 } 1603 1604 case Type::Atomic: { 1605 std::pair<uint64_t, unsigned> Info 1606 = getTypeInfo(cast<AtomicType>(T)->getValueType()); 1607 Width = Info.first; 1608 Align = Info.second; 1609 if (Width != 0 && Width <= Target->getMaxAtomicPromoteWidth() && 1610 llvm::isPowerOf2_64(Width)) { 1611 // We can potentially perform lock-free atomic operations for this 1612 // type; promote the alignment appropriately. 1613 // FIXME: We could potentially promote the width here as well... 1614 // is that worthwhile? (Non-struct atomic types generally have 1615 // power-of-two size anyway, but structs might not. Requires a bit 1616 // of implementation work to make sure we zero out the extra bits.) 1617 Align = static_cast<unsigned>(Width); 1618 } 1619 } 1620 1621 } 1622 1623 assert(llvm::isPowerOf2_32(Align) && "Alignment must be power of 2"); 1624 return std::make_pair(Width, Align); 1625} 1626 1627/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1628CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 1629 return CharUnits::fromQuantity(BitSize / getCharWidth()); 1630} 1631 1632/// toBits - Convert a size in characters to a size in characters. 1633int64_t ASTContext::toBits(CharUnits CharSize) const { 1634 return CharSize.getQuantity() * getCharWidth(); 1635} 1636 1637/// getTypeSizeInChars - Return the size of the specified type, in characters. 1638/// This method does not work on incomplete types. 1639CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 1640 return toCharUnitsFromBits(getTypeSize(T)); 1641} 1642CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 1643 return toCharUnitsFromBits(getTypeSize(T)); 1644} 1645 1646/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1647/// characters. This method does not work on incomplete types. 1648CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 1649 return toCharUnitsFromBits(getTypeAlign(T)); 1650} 1651CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 1652 return toCharUnitsFromBits(getTypeAlign(T)); 1653} 1654 1655/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1656/// type for the current target in bits. This can be different than the ABI 1657/// alignment in cases where it is beneficial for performance to overalign 1658/// a data type. 1659unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 1660 unsigned ABIAlign = getTypeAlign(T); 1661 1662 // Double and long long should be naturally aligned if possible. 1663 if (const ComplexType* CT = T->getAs<ComplexType>()) 1664 T = CT->getElementType().getTypePtr(); 1665 if (T->isSpecificBuiltinType(BuiltinType::Double) || 1666 T->isSpecificBuiltinType(BuiltinType::LongLong) || 1667 T->isSpecificBuiltinType(BuiltinType::ULongLong)) 1668 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 1669 1670 return ABIAlign; 1671} 1672 1673/// DeepCollectObjCIvars - 1674/// This routine first collects all declared, but not synthesized, ivars in 1675/// super class and then collects all ivars, including those synthesized for 1676/// current class. This routine is used for implementation of current class 1677/// when all ivars, declared and synthesized are known. 1678/// 1679void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 1680 bool leafClass, 1681 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const { 1682 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 1683 DeepCollectObjCIvars(SuperClass, false, Ivars); 1684 if (!leafClass) { 1685 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1686 E = OI->ivar_end(); I != E; ++I) 1687 Ivars.push_back(*I); 1688 } else { 1689 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 1690 for (const ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 1691 Iv= Iv->getNextIvar()) 1692 Ivars.push_back(Iv); 1693 } 1694} 1695 1696/// CollectInheritedProtocols - Collect all protocols in current class and 1697/// those inherited by it. 1698void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1699 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1700 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1701 // We can use protocol_iterator here instead of 1702 // all_referenced_protocol_iterator since we are walking all categories. 1703 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1704 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1705 ObjCProtocolDecl *Proto = (*P); 1706 Protocols.insert(Proto->getCanonicalDecl()); 1707 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1708 PE = Proto->protocol_end(); P != PE; ++P) { 1709 Protocols.insert((*P)->getCanonicalDecl()); 1710 CollectInheritedProtocols(*P, Protocols); 1711 } 1712 } 1713 1714 // Categories of this Interface. 1715 for (ObjCInterfaceDecl::visible_categories_iterator 1716 Cat = OI->visible_categories_begin(), 1717 CatEnd = OI->visible_categories_end(); 1718 Cat != CatEnd; ++Cat) { 1719 CollectInheritedProtocols(*Cat, Protocols); 1720 } 1721 1722 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1723 while (SD) { 1724 CollectInheritedProtocols(SD, Protocols); 1725 SD = SD->getSuperClass(); 1726 } 1727 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1728 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1729 PE = OC->protocol_end(); P != PE; ++P) { 1730 ObjCProtocolDecl *Proto = (*P); 1731 Protocols.insert(Proto->getCanonicalDecl()); 1732 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1733 PE = Proto->protocol_end(); P != PE; ++P) 1734 CollectInheritedProtocols(*P, Protocols); 1735 } 1736 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1737 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1738 PE = OP->protocol_end(); P != PE; ++P) { 1739 ObjCProtocolDecl *Proto = (*P); 1740 Protocols.insert(Proto->getCanonicalDecl()); 1741 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1742 PE = Proto->protocol_end(); P != PE; ++P) 1743 CollectInheritedProtocols(*P, Protocols); 1744 } 1745 } 1746} 1747 1748unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1749 unsigned count = 0; 1750 // Count ivars declared in class extension. 1751 for (ObjCInterfaceDecl::known_extensions_iterator 1752 Ext = OI->known_extensions_begin(), 1753 ExtEnd = OI->known_extensions_end(); 1754 Ext != ExtEnd; ++Ext) { 1755 count += Ext->ivar_size(); 1756 } 1757 1758 // Count ivar defined in this class's implementation. This 1759 // includes synthesized ivars. 1760 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1761 count += ImplDecl->ivar_size(); 1762 1763 return count; 1764} 1765 1766bool ASTContext::isSentinelNullExpr(const Expr *E) { 1767 if (!E) 1768 return false; 1769 1770 // nullptr_t is always treated as null. 1771 if (E->getType()->isNullPtrType()) return true; 1772 1773 if (E->getType()->isAnyPointerType() && 1774 E->IgnoreParenCasts()->isNullPointerConstant(*this, 1775 Expr::NPC_ValueDependentIsNull)) 1776 return true; 1777 1778 // Unfortunately, __null has type 'int'. 1779 if (isa<GNUNullExpr>(E)) return true; 1780 1781 return false; 1782} 1783 1784/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1785ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1786 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1787 I = ObjCImpls.find(D); 1788 if (I != ObjCImpls.end()) 1789 return cast<ObjCImplementationDecl>(I->second); 1790 return 0; 1791} 1792/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1793ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1794 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1795 I = ObjCImpls.find(D); 1796 if (I != ObjCImpls.end()) 1797 return cast<ObjCCategoryImplDecl>(I->second); 1798 return 0; 1799} 1800 1801/// \brief Set the implementation of ObjCInterfaceDecl. 1802void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1803 ObjCImplementationDecl *ImplD) { 1804 assert(IFaceD && ImplD && "Passed null params"); 1805 ObjCImpls[IFaceD] = ImplD; 1806} 1807/// \brief Set the implementation of ObjCCategoryDecl. 1808void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1809 ObjCCategoryImplDecl *ImplD) { 1810 assert(CatD && ImplD && "Passed null params"); 1811 ObjCImpls[CatD] = ImplD; 1812} 1813 1814const ObjCInterfaceDecl *ASTContext::getObjContainingInterface( 1815 const NamedDecl *ND) const { 1816 if (const ObjCInterfaceDecl *ID = 1817 dyn_cast<ObjCInterfaceDecl>(ND->getDeclContext())) 1818 return ID; 1819 if (const ObjCCategoryDecl *CD = 1820 dyn_cast<ObjCCategoryDecl>(ND->getDeclContext())) 1821 return CD->getClassInterface(); 1822 if (const ObjCImplDecl *IMD = 1823 dyn_cast<ObjCImplDecl>(ND->getDeclContext())) 1824 return IMD->getClassInterface(); 1825 1826 return 0; 1827} 1828 1829/// \brief Get the copy initialization expression of VarDecl,or NULL if 1830/// none exists. 1831Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1832 assert(VD && "Passed null params"); 1833 assert(VD->hasAttr<BlocksAttr>() && 1834 "getBlockVarCopyInits - not __block var"); 1835 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1836 I = BlockVarCopyInits.find(VD); 1837 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1838} 1839 1840/// \brief Set the copy inialization expression of a block var decl. 1841void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1842 assert(VD && Init && "Passed null params"); 1843 assert(VD->hasAttr<BlocksAttr>() && 1844 "setBlockVarCopyInits - not __block var"); 1845 BlockVarCopyInits[VD] = Init; 1846} 1847 1848TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1849 unsigned DataSize) const { 1850 if (!DataSize) 1851 DataSize = TypeLoc::getFullDataSizeForType(T); 1852 else 1853 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1854 "incorrect data size provided to CreateTypeSourceInfo!"); 1855 1856 TypeSourceInfo *TInfo = 1857 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1858 new (TInfo) TypeSourceInfo(T); 1859 return TInfo; 1860} 1861 1862TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1863 SourceLocation L) const { 1864 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1865 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1866 return DI; 1867} 1868 1869const ASTRecordLayout & 1870ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1871 return getObjCLayout(D, 0); 1872} 1873 1874const ASTRecordLayout & 1875ASTContext::getASTObjCImplementationLayout( 1876 const ObjCImplementationDecl *D) const { 1877 return getObjCLayout(D->getClassInterface(), D); 1878} 1879 1880//===----------------------------------------------------------------------===// 1881// Type creation/memoization methods 1882//===----------------------------------------------------------------------===// 1883 1884QualType 1885ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1886 unsigned fastQuals = quals.getFastQualifiers(); 1887 quals.removeFastQualifiers(); 1888 1889 // Check if we've already instantiated this type. 1890 llvm::FoldingSetNodeID ID; 1891 ExtQuals::Profile(ID, baseType, quals); 1892 void *insertPos = 0; 1893 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1894 assert(eq->getQualifiers() == quals); 1895 return QualType(eq, fastQuals); 1896 } 1897 1898 // If the base type is not canonical, make the appropriate canonical type. 1899 QualType canon; 1900 if (!baseType->isCanonicalUnqualified()) { 1901 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1902 canonSplit.Quals.addConsistentQualifiers(quals); 1903 canon = getExtQualType(canonSplit.Ty, canonSplit.Quals); 1904 1905 // Re-find the insert position. 1906 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1907 } 1908 1909 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1910 ExtQualNodes.InsertNode(eq, insertPos); 1911 return QualType(eq, fastQuals); 1912} 1913 1914QualType 1915ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1916 QualType CanT = getCanonicalType(T); 1917 if (CanT.getAddressSpace() == AddressSpace) 1918 return T; 1919 1920 // If we are composing extended qualifiers together, merge together 1921 // into one ExtQuals node. 1922 QualifierCollector Quals; 1923 const Type *TypeNode = Quals.strip(T); 1924 1925 // If this type already has an address space specified, it cannot get 1926 // another one. 1927 assert(!Quals.hasAddressSpace() && 1928 "Type cannot be in multiple addr spaces!"); 1929 Quals.addAddressSpace(AddressSpace); 1930 1931 return getExtQualType(TypeNode, Quals); 1932} 1933 1934QualType ASTContext::getObjCGCQualType(QualType T, 1935 Qualifiers::GC GCAttr) const { 1936 QualType CanT = getCanonicalType(T); 1937 if (CanT.getObjCGCAttr() == GCAttr) 1938 return T; 1939 1940 if (const PointerType *ptr = T->getAs<PointerType>()) { 1941 QualType Pointee = ptr->getPointeeType(); 1942 if (Pointee->isAnyPointerType()) { 1943 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1944 return getPointerType(ResultType); 1945 } 1946 } 1947 1948 // If we are composing extended qualifiers together, merge together 1949 // into one ExtQuals node. 1950 QualifierCollector Quals; 1951 const Type *TypeNode = Quals.strip(T); 1952 1953 // If this type already has an ObjCGC specified, it cannot get 1954 // another one. 1955 assert(!Quals.hasObjCGCAttr() && 1956 "Type cannot have multiple ObjCGCs!"); 1957 Quals.addObjCGCAttr(GCAttr); 1958 1959 return getExtQualType(TypeNode, Quals); 1960} 1961 1962const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1963 FunctionType::ExtInfo Info) { 1964 if (T->getExtInfo() == Info) 1965 return T; 1966 1967 QualType Result; 1968 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1969 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1970 } else { 1971 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1972 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1973 EPI.ExtInfo = Info; 1974 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1975 FPT->getNumArgs(), EPI); 1976 } 1977 1978 return cast<FunctionType>(Result.getTypePtr()); 1979} 1980 1981/// getComplexType - Return the uniqued reference to the type for a complex 1982/// number with the specified element type. 1983QualType ASTContext::getComplexType(QualType T) const { 1984 // Unique pointers, to guarantee there is only one pointer of a particular 1985 // structure. 1986 llvm::FoldingSetNodeID ID; 1987 ComplexType::Profile(ID, T); 1988 1989 void *InsertPos = 0; 1990 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1991 return QualType(CT, 0); 1992 1993 // If the pointee type isn't canonical, this won't be a canonical type either, 1994 // so fill in the canonical type field. 1995 QualType Canonical; 1996 if (!T.isCanonical()) { 1997 Canonical = getComplexType(getCanonicalType(T)); 1998 1999 // Get the new insert position for the node we care about. 2000 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 2001 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2002 } 2003 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 2004 Types.push_back(New); 2005 ComplexTypes.InsertNode(New, InsertPos); 2006 return QualType(New, 0); 2007} 2008 2009/// getPointerType - Return the uniqued reference to the type for a pointer to 2010/// the specified type. 2011QualType ASTContext::getPointerType(QualType T) const { 2012 // Unique pointers, to guarantee there is only one pointer of a particular 2013 // structure. 2014 llvm::FoldingSetNodeID ID; 2015 PointerType::Profile(ID, T); 2016 2017 void *InsertPos = 0; 2018 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2019 return QualType(PT, 0); 2020 2021 // If the pointee type isn't canonical, this won't be a canonical type either, 2022 // so fill in the canonical type field. 2023 QualType Canonical; 2024 if (!T.isCanonical()) { 2025 Canonical = getPointerType(getCanonicalType(T)); 2026 2027 // Get the new insert position for the node we care about. 2028 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2029 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2030 } 2031 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 2032 Types.push_back(New); 2033 PointerTypes.InsertNode(New, InsertPos); 2034 return QualType(New, 0); 2035} 2036 2037/// getBlockPointerType - Return the uniqued reference to the type for 2038/// a pointer to the specified block. 2039QualType ASTContext::getBlockPointerType(QualType T) const { 2040 assert(T->isFunctionType() && "block of function types only"); 2041 // Unique pointers, to guarantee there is only one block of a particular 2042 // structure. 2043 llvm::FoldingSetNodeID ID; 2044 BlockPointerType::Profile(ID, T); 2045 2046 void *InsertPos = 0; 2047 if (BlockPointerType *PT = 2048 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2049 return QualType(PT, 0); 2050 2051 // If the block pointee type isn't canonical, this won't be a canonical 2052 // type either so fill in the canonical type field. 2053 QualType Canonical; 2054 if (!T.isCanonical()) { 2055 Canonical = getBlockPointerType(getCanonicalType(T)); 2056 2057 // Get the new insert position for the node we care about. 2058 BlockPointerType *NewIP = 2059 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2060 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2061 } 2062 BlockPointerType *New 2063 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 2064 Types.push_back(New); 2065 BlockPointerTypes.InsertNode(New, InsertPos); 2066 return QualType(New, 0); 2067} 2068 2069/// getLValueReferenceType - Return the uniqued reference to the type for an 2070/// lvalue reference to the specified type. 2071QualType 2072ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 2073 assert(getCanonicalType(T) != OverloadTy && 2074 "Unresolved overloaded function type"); 2075 2076 // Unique pointers, to guarantee there is only one pointer of a particular 2077 // structure. 2078 llvm::FoldingSetNodeID ID; 2079 ReferenceType::Profile(ID, T, SpelledAsLValue); 2080 2081 void *InsertPos = 0; 2082 if (LValueReferenceType *RT = 2083 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2084 return QualType(RT, 0); 2085 2086 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 2087 2088 // If the referencee type isn't canonical, this won't be a canonical type 2089 // either, so fill in the canonical type field. 2090 QualType Canonical; 2091 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 2092 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 2093 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 2094 2095 // Get the new insert position for the node we care about. 2096 LValueReferenceType *NewIP = 2097 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 2098 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2099 } 2100 2101 LValueReferenceType *New 2102 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 2103 SpelledAsLValue); 2104 Types.push_back(New); 2105 LValueReferenceTypes.InsertNode(New, InsertPos); 2106 2107 return QualType(New, 0); 2108} 2109 2110/// getRValueReferenceType - Return the uniqued reference to the type for an 2111/// rvalue reference to the specified type. 2112QualType ASTContext::getRValueReferenceType(QualType T) const { 2113 // Unique pointers, to guarantee there is only one pointer of a particular 2114 // structure. 2115 llvm::FoldingSetNodeID ID; 2116 ReferenceType::Profile(ID, T, false); 2117 2118 void *InsertPos = 0; 2119 if (RValueReferenceType *RT = 2120 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2121 return QualType(RT, 0); 2122 2123 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 2124 2125 // If the referencee type isn't canonical, this won't be a canonical type 2126 // either, so fill in the canonical type field. 2127 QualType Canonical; 2128 if (InnerRef || !T.isCanonical()) { 2129 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 2130 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 2131 2132 // Get the new insert position for the node we care about. 2133 RValueReferenceType *NewIP = 2134 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 2135 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2136 } 2137 2138 RValueReferenceType *New 2139 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 2140 Types.push_back(New); 2141 RValueReferenceTypes.InsertNode(New, InsertPos); 2142 return QualType(New, 0); 2143} 2144 2145/// getMemberPointerType - Return the uniqued reference to the type for a 2146/// member pointer to the specified type, in the specified class. 2147QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 2148 // Unique pointers, to guarantee there is only one pointer of a particular 2149 // structure. 2150 llvm::FoldingSetNodeID ID; 2151 MemberPointerType::Profile(ID, T, Cls); 2152 2153 void *InsertPos = 0; 2154 if (MemberPointerType *PT = 2155 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2156 return QualType(PT, 0); 2157 2158 // If the pointee or class type isn't canonical, this won't be a canonical 2159 // type either, so fill in the canonical type field. 2160 QualType Canonical; 2161 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 2162 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 2163 2164 // Get the new insert position for the node we care about. 2165 MemberPointerType *NewIP = 2166 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2167 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2168 } 2169 MemberPointerType *New 2170 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 2171 Types.push_back(New); 2172 MemberPointerTypes.InsertNode(New, InsertPos); 2173 return QualType(New, 0); 2174} 2175 2176/// getConstantArrayType - Return the unique reference to the type for an 2177/// array of the specified element type. 2178QualType ASTContext::getConstantArrayType(QualType EltTy, 2179 const llvm::APInt &ArySizeIn, 2180 ArrayType::ArraySizeModifier ASM, 2181 unsigned IndexTypeQuals) const { 2182 assert((EltTy->isDependentType() || 2183 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 2184 "Constant array of VLAs is illegal!"); 2185 2186 // Convert the array size into a canonical width matching the pointer size for 2187 // the target. 2188 llvm::APInt ArySize(ArySizeIn); 2189 ArySize = 2190 ArySize.zextOrTrunc(Target->getPointerWidth(getTargetAddressSpace(EltTy))); 2191 2192 llvm::FoldingSetNodeID ID; 2193 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 2194 2195 void *InsertPos = 0; 2196 if (ConstantArrayType *ATP = 2197 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 2198 return QualType(ATP, 0); 2199 2200 // If the element type isn't canonical or has qualifiers, this won't 2201 // be a canonical type either, so fill in the canonical type field. 2202 QualType Canon; 2203 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 2204 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 2205 Canon = getConstantArrayType(QualType(canonSplit.Ty, 0), ArySize, 2206 ASM, IndexTypeQuals); 2207 Canon = getQualifiedType(Canon, canonSplit.Quals); 2208 2209 // Get the new insert position for the node we care about. 2210 ConstantArrayType *NewIP = 2211 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 2212 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2213 } 2214 2215 ConstantArrayType *New = new(*this,TypeAlignment) 2216 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 2217 ConstantArrayTypes.InsertNode(New, InsertPos); 2218 Types.push_back(New); 2219 return QualType(New, 0); 2220} 2221 2222/// getVariableArrayDecayedType - Turns the given type, which may be 2223/// variably-modified, into the corresponding type with all the known 2224/// sizes replaced with [*]. 2225QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 2226 // Vastly most common case. 2227 if (!type->isVariablyModifiedType()) return type; 2228 2229 QualType result; 2230 2231 SplitQualType split = type.getSplitDesugaredType(); 2232 const Type *ty = split.Ty; 2233 switch (ty->getTypeClass()) { 2234#define TYPE(Class, Base) 2235#define ABSTRACT_TYPE(Class, Base) 2236#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 2237#include "clang/AST/TypeNodes.def" 2238 llvm_unreachable("didn't desugar past all non-canonical types?"); 2239 2240 // These types should never be variably-modified. 2241 case Type::Builtin: 2242 case Type::Complex: 2243 case Type::Vector: 2244 case Type::ExtVector: 2245 case Type::DependentSizedExtVector: 2246 case Type::ObjCObject: 2247 case Type::ObjCInterface: 2248 case Type::ObjCObjectPointer: 2249 case Type::Record: 2250 case Type::Enum: 2251 case Type::UnresolvedUsing: 2252 case Type::TypeOfExpr: 2253 case Type::TypeOf: 2254 case Type::Decltype: 2255 case Type::UnaryTransform: 2256 case Type::DependentName: 2257 case Type::InjectedClassName: 2258 case Type::TemplateSpecialization: 2259 case Type::DependentTemplateSpecialization: 2260 case Type::TemplateTypeParm: 2261 case Type::SubstTemplateTypeParmPack: 2262 case Type::Auto: 2263 case Type::PackExpansion: 2264 llvm_unreachable("type should never be variably-modified"); 2265 2266 // These types can be variably-modified but should never need to 2267 // further decay. 2268 case Type::FunctionNoProto: 2269 case Type::FunctionProto: 2270 case Type::BlockPointer: 2271 case Type::MemberPointer: 2272 return type; 2273 2274 // These types can be variably-modified. All these modifications 2275 // preserve structure except as noted by comments. 2276 // TODO: if we ever care about optimizing VLAs, there are no-op 2277 // optimizations available here. 2278 case Type::Pointer: 2279 result = getPointerType(getVariableArrayDecayedType( 2280 cast<PointerType>(ty)->getPointeeType())); 2281 break; 2282 2283 case Type::LValueReference: { 2284 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 2285 result = getLValueReferenceType( 2286 getVariableArrayDecayedType(lv->getPointeeType()), 2287 lv->isSpelledAsLValue()); 2288 break; 2289 } 2290 2291 case Type::RValueReference: { 2292 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 2293 result = getRValueReferenceType( 2294 getVariableArrayDecayedType(lv->getPointeeType())); 2295 break; 2296 } 2297 2298 case Type::Atomic: { 2299 const AtomicType *at = cast<AtomicType>(ty); 2300 result = getAtomicType(getVariableArrayDecayedType(at->getValueType())); 2301 break; 2302 } 2303 2304 case Type::ConstantArray: { 2305 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 2306 result = getConstantArrayType( 2307 getVariableArrayDecayedType(cat->getElementType()), 2308 cat->getSize(), 2309 cat->getSizeModifier(), 2310 cat->getIndexTypeCVRQualifiers()); 2311 break; 2312 } 2313 2314 case Type::DependentSizedArray: { 2315 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 2316 result = getDependentSizedArrayType( 2317 getVariableArrayDecayedType(dat->getElementType()), 2318 dat->getSizeExpr(), 2319 dat->getSizeModifier(), 2320 dat->getIndexTypeCVRQualifiers(), 2321 dat->getBracketsRange()); 2322 break; 2323 } 2324 2325 // Turn incomplete types into [*] types. 2326 case Type::IncompleteArray: { 2327 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 2328 result = getVariableArrayType( 2329 getVariableArrayDecayedType(iat->getElementType()), 2330 /*size*/ 0, 2331 ArrayType::Normal, 2332 iat->getIndexTypeCVRQualifiers(), 2333 SourceRange()); 2334 break; 2335 } 2336 2337 // Turn VLA types into [*] types. 2338 case Type::VariableArray: { 2339 const VariableArrayType *vat = cast<VariableArrayType>(ty); 2340 result = getVariableArrayType( 2341 getVariableArrayDecayedType(vat->getElementType()), 2342 /*size*/ 0, 2343 ArrayType::Star, 2344 vat->getIndexTypeCVRQualifiers(), 2345 vat->getBracketsRange()); 2346 break; 2347 } 2348 } 2349 2350 // Apply the top-level qualifiers from the original. 2351 return getQualifiedType(result, split.Quals); 2352} 2353 2354/// getVariableArrayType - Returns a non-unique reference to the type for a 2355/// variable array of the specified element type. 2356QualType ASTContext::getVariableArrayType(QualType EltTy, 2357 Expr *NumElts, 2358 ArrayType::ArraySizeModifier ASM, 2359 unsigned IndexTypeQuals, 2360 SourceRange Brackets) const { 2361 // Since we don't unique expressions, it isn't possible to unique VLA's 2362 // that have an expression provided for their size. 2363 QualType Canon; 2364 2365 // Be sure to pull qualifiers off the element type. 2366 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 2367 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 2368 Canon = getVariableArrayType(QualType(canonSplit.Ty, 0), NumElts, ASM, 2369 IndexTypeQuals, Brackets); 2370 Canon = getQualifiedType(Canon, canonSplit.Quals); 2371 } 2372 2373 VariableArrayType *New = new(*this, TypeAlignment) 2374 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 2375 2376 VariableArrayTypes.push_back(New); 2377 Types.push_back(New); 2378 return QualType(New, 0); 2379} 2380 2381/// getDependentSizedArrayType - Returns a non-unique reference to 2382/// the type for a dependently-sized array of the specified element 2383/// type. 2384QualType ASTContext::getDependentSizedArrayType(QualType elementType, 2385 Expr *numElements, 2386 ArrayType::ArraySizeModifier ASM, 2387 unsigned elementTypeQuals, 2388 SourceRange brackets) const { 2389 assert((!numElements || numElements->isTypeDependent() || 2390 numElements->isValueDependent()) && 2391 "Size must be type- or value-dependent!"); 2392 2393 // Dependently-sized array types that do not have a specified number 2394 // of elements will have their sizes deduced from a dependent 2395 // initializer. We do no canonicalization here at all, which is okay 2396 // because they can't be used in most locations. 2397 if (!numElements) { 2398 DependentSizedArrayType *newType 2399 = new (*this, TypeAlignment) 2400 DependentSizedArrayType(*this, elementType, QualType(), 2401 numElements, ASM, elementTypeQuals, 2402 brackets); 2403 Types.push_back(newType); 2404 return QualType(newType, 0); 2405 } 2406 2407 // Otherwise, we actually build a new type every time, but we 2408 // also build a canonical type. 2409 2410 SplitQualType canonElementType = getCanonicalType(elementType).split(); 2411 2412 void *insertPos = 0; 2413 llvm::FoldingSetNodeID ID; 2414 DependentSizedArrayType::Profile(ID, *this, 2415 QualType(canonElementType.Ty, 0), 2416 ASM, elementTypeQuals, numElements); 2417 2418 // Look for an existing type with these properties. 2419 DependentSizedArrayType *canonTy = 2420 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 2421 2422 // If we don't have one, build one. 2423 if (!canonTy) { 2424 canonTy = new (*this, TypeAlignment) 2425 DependentSizedArrayType(*this, QualType(canonElementType.Ty, 0), 2426 QualType(), numElements, ASM, elementTypeQuals, 2427 brackets); 2428 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 2429 Types.push_back(canonTy); 2430 } 2431 2432 // Apply qualifiers from the element type to the array. 2433 QualType canon = getQualifiedType(QualType(canonTy,0), 2434 canonElementType.Quals); 2435 2436 // If we didn't need extra canonicalization for the element type, 2437 // then just use that as our result. 2438 if (QualType(canonElementType.Ty, 0) == elementType) 2439 return canon; 2440 2441 // Otherwise, we need to build a type which follows the spelling 2442 // of the element type. 2443 DependentSizedArrayType *sugaredType 2444 = new (*this, TypeAlignment) 2445 DependentSizedArrayType(*this, elementType, canon, numElements, 2446 ASM, elementTypeQuals, brackets); 2447 Types.push_back(sugaredType); 2448 return QualType(sugaredType, 0); 2449} 2450 2451QualType ASTContext::getIncompleteArrayType(QualType elementType, 2452 ArrayType::ArraySizeModifier ASM, 2453 unsigned elementTypeQuals) const { 2454 llvm::FoldingSetNodeID ID; 2455 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 2456 2457 void *insertPos = 0; 2458 if (IncompleteArrayType *iat = 2459 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 2460 return QualType(iat, 0); 2461 2462 // If the element type isn't canonical, this won't be a canonical type 2463 // either, so fill in the canonical type field. We also have to pull 2464 // qualifiers off the element type. 2465 QualType canon; 2466 2467 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 2468 SplitQualType canonSplit = getCanonicalType(elementType).split(); 2469 canon = getIncompleteArrayType(QualType(canonSplit.Ty, 0), 2470 ASM, elementTypeQuals); 2471 canon = getQualifiedType(canon, canonSplit.Quals); 2472 2473 // Get the new insert position for the node we care about. 2474 IncompleteArrayType *existing = 2475 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 2476 assert(!existing && "Shouldn't be in the map!"); (void) existing; 2477 } 2478 2479 IncompleteArrayType *newType = new (*this, TypeAlignment) 2480 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 2481 2482 IncompleteArrayTypes.InsertNode(newType, insertPos); 2483 Types.push_back(newType); 2484 return QualType(newType, 0); 2485} 2486 2487/// getVectorType - Return the unique reference to a vector type of 2488/// the specified element type and size. VectorType must be a built-in type. 2489QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 2490 VectorType::VectorKind VecKind) const { 2491 assert(vecType->isBuiltinType()); 2492 2493 // Check if we've already instantiated a vector of this type. 2494 llvm::FoldingSetNodeID ID; 2495 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 2496 2497 void *InsertPos = 0; 2498 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 2499 return QualType(VTP, 0); 2500 2501 // If the element type isn't canonical, this won't be a canonical type either, 2502 // so fill in the canonical type field. 2503 QualType Canonical; 2504 if (!vecType.isCanonical()) { 2505 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 2506 2507 // Get the new insert position for the node we care about. 2508 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2509 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2510 } 2511 VectorType *New = new (*this, TypeAlignment) 2512 VectorType(vecType, NumElts, Canonical, VecKind); 2513 VectorTypes.InsertNode(New, InsertPos); 2514 Types.push_back(New); 2515 return QualType(New, 0); 2516} 2517 2518/// getExtVectorType - Return the unique reference to an extended vector type of 2519/// the specified element type and size. VectorType must be a built-in type. 2520QualType 2521ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 2522 assert(vecType->isBuiltinType() || vecType->isDependentType()); 2523 2524 // Check if we've already instantiated a vector of this type. 2525 llvm::FoldingSetNodeID ID; 2526 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 2527 VectorType::GenericVector); 2528 void *InsertPos = 0; 2529 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 2530 return QualType(VTP, 0); 2531 2532 // If the element type isn't canonical, this won't be a canonical type either, 2533 // so fill in the canonical type field. 2534 QualType Canonical; 2535 if (!vecType.isCanonical()) { 2536 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 2537 2538 // Get the new insert position for the node we care about. 2539 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2540 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2541 } 2542 ExtVectorType *New = new (*this, TypeAlignment) 2543 ExtVectorType(vecType, NumElts, Canonical); 2544 VectorTypes.InsertNode(New, InsertPos); 2545 Types.push_back(New); 2546 return QualType(New, 0); 2547} 2548 2549QualType 2550ASTContext::getDependentSizedExtVectorType(QualType vecType, 2551 Expr *SizeExpr, 2552 SourceLocation AttrLoc) const { 2553 llvm::FoldingSetNodeID ID; 2554 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 2555 SizeExpr); 2556 2557 void *InsertPos = 0; 2558 DependentSizedExtVectorType *Canon 2559 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2560 DependentSizedExtVectorType *New; 2561 if (Canon) { 2562 // We already have a canonical version of this array type; use it as 2563 // the canonical type for a newly-built type. 2564 New = new (*this, TypeAlignment) 2565 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 2566 SizeExpr, AttrLoc); 2567 } else { 2568 QualType CanonVecTy = getCanonicalType(vecType); 2569 if (CanonVecTy == vecType) { 2570 New = new (*this, TypeAlignment) 2571 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 2572 AttrLoc); 2573 2574 DependentSizedExtVectorType *CanonCheck 2575 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2576 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 2577 (void)CanonCheck; 2578 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 2579 } else { 2580 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 2581 SourceLocation()); 2582 New = new (*this, TypeAlignment) 2583 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 2584 } 2585 } 2586 2587 Types.push_back(New); 2588 return QualType(New, 0); 2589} 2590 2591/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 2592/// 2593QualType 2594ASTContext::getFunctionNoProtoType(QualType ResultTy, 2595 const FunctionType::ExtInfo &Info) const { 2596 const CallingConv DefaultCC = Info.getCC(); 2597 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2598 CC_X86StdCall : DefaultCC; 2599 // Unique functions, to guarantee there is only one function of a particular 2600 // structure. 2601 llvm::FoldingSetNodeID ID; 2602 FunctionNoProtoType::Profile(ID, ResultTy, Info); 2603 2604 void *InsertPos = 0; 2605 if (FunctionNoProtoType *FT = 2606 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2607 return QualType(FT, 0); 2608 2609 QualType Canonical; 2610 if (!ResultTy.isCanonical() || 2611 getCanonicalCallConv(CallConv) != CallConv) { 2612 Canonical = 2613 getFunctionNoProtoType(getCanonicalType(ResultTy), 2614 Info.withCallingConv(getCanonicalCallConv(CallConv))); 2615 2616 // Get the new insert position for the node we care about. 2617 FunctionNoProtoType *NewIP = 2618 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2619 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2620 } 2621 2622 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 2623 FunctionNoProtoType *New = new (*this, TypeAlignment) 2624 FunctionNoProtoType(ResultTy, Canonical, newInfo); 2625 Types.push_back(New); 2626 FunctionNoProtoTypes.InsertNode(New, InsertPos); 2627 return QualType(New, 0); 2628} 2629 2630/// \brief Determine whether \p T is canonical as the result type of a function. 2631static bool isCanonicalResultType(QualType T) { 2632 return T.isCanonical() && 2633 (T.getObjCLifetime() == Qualifiers::OCL_None || 2634 T.getObjCLifetime() == Qualifiers::OCL_ExplicitNone); 2635} 2636 2637/// getFunctionType - Return a normal function type with a typed argument 2638/// list. isVariadic indicates whether the argument list includes '...'. 2639QualType 2640ASTContext::getFunctionType(QualType ResultTy, 2641 const QualType *ArgArray, unsigned NumArgs, 2642 const FunctionProtoType::ExtProtoInfo &EPI) const { 2643 // Unique functions, to guarantee there is only one function of a particular 2644 // structure. 2645 llvm::FoldingSetNodeID ID; 2646 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 2647 2648 void *InsertPos = 0; 2649 if (FunctionProtoType *FTP = 2650 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2651 return QualType(FTP, 0); 2652 2653 // Determine whether the type being created is already canonical or not. 2654 bool isCanonical = 2655 EPI.ExceptionSpecType == EST_None && isCanonicalResultType(ResultTy) && 2656 !EPI.HasTrailingReturn; 2657 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 2658 if (!ArgArray[i].isCanonicalAsParam()) 2659 isCanonical = false; 2660 2661 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 2662 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2663 CC_X86StdCall : DefaultCC; 2664 2665 // If this type isn't canonical, get the canonical version of it. 2666 // The exception spec is not part of the canonical type. 2667 QualType Canonical; 2668 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 2669 SmallVector<QualType, 16> CanonicalArgs; 2670 CanonicalArgs.reserve(NumArgs); 2671 for (unsigned i = 0; i != NumArgs; ++i) 2672 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 2673 2674 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 2675 CanonicalEPI.HasTrailingReturn = false; 2676 CanonicalEPI.ExceptionSpecType = EST_None; 2677 CanonicalEPI.NumExceptions = 0; 2678 CanonicalEPI.ExtInfo 2679 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 2680 2681 // Result types do not have ARC lifetime qualifiers. 2682 QualType CanResultTy = getCanonicalType(ResultTy); 2683 if (ResultTy.getQualifiers().hasObjCLifetime()) { 2684 Qualifiers Qs = CanResultTy.getQualifiers(); 2685 Qs.removeObjCLifetime(); 2686 CanResultTy = getQualifiedType(CanResultTy.getUnqualifiedType(), Qs); 2687 } 2688 2689 Canonical = getFunctionType(CanResultTy, 2690 CanonicalArgs.data(), NumArgs, 2691 CanonicalEPI); 2692 2693 // Get the new insert position for the node we care about. 2694 FunctionProtoType *NewIP = 2695 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2696 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2697 } 2698 2699 // FunctionProtoType objects are allocated with extra bytes after 2700 // them for three variable size arrays at the end: 2701 // - parameter types 2702 // - exception types 2703 // - consumed-arguments flags 2704 // Instead of the exception types, there could be a noexcept 2705 // expression, or information used to resolve the exception 2706 // specification. 2707 size_t Size = sizeof(FunctionProtoType) + 2708 NumArgs * sizeof(QualType); 2709 if (EPI.ExceptionSpecType == EST_Dynamic) { 2710 Size += EPI.NumExceptions * sizeof(QualType); 2711 } else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2712 Size += sizeof(Expr*); 2713 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) { 2714 Size += 2 * sizeof(FunctionDecl*); 2715 } else if (EPI.ExceptionSpecType == EST_Unevaluated) { 2716 Size += sizeof(FunctionDecl*); 2717 } 2718 if (EPI.ConsumedArguments) 2719 Size += NumArgs * sizeof(bool); 2720 2721 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 2722 FunctionProtoType::ExtProtoInfo newEPI = EPI; 2723 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 2724 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 2725 Types.push_back(FTP); 2726 FunctionProtoTypes.InsertNode(FTP, InsertPos); 2727 return QualType(FTP, 0); 2728} 2729 2730#ifndef NDEBUG 2731static bool NeedsInjectedClassNameType(const RecordDecl *D) { 2732 if (!isa<CXXRecordDecl>(D)) return false; 2733 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2734 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2735 return true; 2736 if (RD->getDescribedClassTemplate() && 2737 !isa<ClassTemplateSpecializationDecl>(RD)) 2738 return true; 2739 return false; 2740} 2741#endif 2742 2743/// getInjectedClassNameType - Return the unique reference to the 2744/// injected class name type for the specified templated declaration. 2745QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2746 QualType TST) const { 2747 assert(NeedsInjectedClassNameType(Decl)); 2748 if (Decl->TypeForDecl) { 2749 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2750 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDecl()) { 2751 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2752 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2753 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2754 } else { 2755 Type *newType = 2756 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2757 Decl->TypeForDecl = newType; 2758 Types.push_back(newType); 2759 } 2760 return QualType(Decl->TypeForDecl, 0); 2761} 2762 2763/// getTypeDeclType - Return the unique reference to the type for the 2764/// specified type declaration. 2765QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2766 assert(Decl && "Passed null for Decl param"); 2767 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2768 2769 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl)) 2770 return getTypedefType(Typedef); 2771 2772 assert(!isa<TemplateTypeParmDecl>(Decl) && 2773 "Template type parameter types are always available."); 2774 2775 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2776 assert(!Record->getPreviousDecl() && 2777 "struct/union has previous declaration"); 2778 assert(!NeedsInjectedClassNameType(Record)); 2779 return getRecordType(Record); 2780 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2781 assert(!Enum->getPreviousDecl() && 2782 "enum has previous declaration"); 2783 return getEnumType(Enum); 2784 } else if (const UnresolvedUsingTypenameDecl *Using = 2785 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2786 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2787 Decl->TypeForDecl = newType; 2788 Types.push_back(newType); 2789 } else 2790 llvm_unreachable("TypeDecl without a type?"); 2791 2792 return QualType(Decl->TypeForDecl, 0); 2793} 2794 2795/// getTypedefType - Return the unique reference to the type for the 2796/// specified typedef name decl. 2797QualType 2798ASTContext::getTypedefType(const TypedefNameDecl *Decl, 2799 QualType Canonical) const { 2800 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2801 2802 if (Canonical.isNull()) 2803 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2804 TypedefType *newType = new(*this, TypeAlignment) 2805 TypedefType(Type::Typedef, Decl, Canonical); 2806 Decl->TypeForDecl = newType; 2807 Types.push_back(newType); 2808 return QualType(newType, 0); 2809} 2810 2811QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2812 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2813 2814 if (const RecordDecl *PrevDecl = Decl->getPreviousDecl()) 2815 if (PrevDecl->TypeForDecl) 2816 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2817 2818 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2819 Decl->TypeForDecl = newType; 2820 Types.push_back(newType); 2821 return QualType(newType, 0); 2822} 2823 2824QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2825 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2826 2827 if (const EnumDecl *PrevDecl = Decl->getPreviousDecl()) 2828 if (PrevDecl->TypeForDecl) 2829 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2830 2831 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2832 Decl->TypeForDecl = newType; 2833 Types.push_back(newType); 2834 return QualType(newType, 0); 2835} 2836 2837QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2838 QualType modifiedType, 2839 QualType equivalentType) { 2840 llvm::FoldingSetNodeID id; 2841 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2842 2843 void *insertPos = 0; 2844 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2845 if (type) return QualType(type, 0); 2846 2847 QualType canon = getCanonicalType(equivalentType); 2848 type = new (*this, TypeAlignment) 2849 AttributedType(canon, attrKind, modifiedType, equivalentType); 2850 2851 Types.push_back(type); 2852 AttributedTypes.InsertNode(type, insertPos); 2853 2854 return QualType(type, 0); 2855} 2856 2857 2858/// \brief Retrieve a substitution-result type. 2859QualType 2860ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2861 QualType Replacement) const { 2862 assert(Replacement.isCanonical() 2863 && "replacement types must always be canonical"); 2864 2865 llvm::FoldingSetNodeID ID; 2866 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2867 void *InsertPos = 0; 2868 SubstTemplateTypeParmType *SubstParm 2869 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2870 2871 if (!SubstParm) { 2872 SubstParm = new (*this, TypeAlignment) 2873 SubstTemplateTypeParmType(Parm, Replacement); 2874 Types.push_back(SubstParm); 2875 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2876 } 2877 2878 return QualType(SubstParm, 0); 2879} 2880 2881/// \brief Retrieve a 2882QualType ASTContext::getSubstTemplateTypeParmPackType( 2883 const TemplateTypeParmType *Parm, 2884 const TemplateArgument &ArgPack) { 2885#ifndef NDEBUG 2886 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2887 PEnd = ArgPack.pack_end(); 2888 P != PEnd; ++P) { 2889 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2890 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2891 } 2892#endif 2893 2894 llvm::FoldingSetNodeID ID; 2895 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2896 void *InsertPos = 0; 2897 if (SubstTemplateTypeParmPackType *SubstParm 2898 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2899 return QualType(SubstParm, 0); 2900 2901 QualType Canon; 2902 if (!Parm->isCanonicalUnqualified()) { 2903 Canon = getCanonicalType(QualType(Parm, 0)); 2904 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2905 ArgPack); 2906 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2907 } 2908 2909 SubstTemplateTypeParmPackType *SubstParm 2910 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2911 ArgPack); 2912 Types.push_back(SubstParm); 2913 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2914 return QualType(SubstParm, 0); 2915} 2916 2917/// \brief Retrieve the template type parameter type for a template 2918/// parameter or parameter pack with the given depth, index, and (optionally) 2919/// name. 2920QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2921 bool ParameterPack, 2922 TemplateTypeParmDecl *TTPDecl) const { 2923 llvm::FoldingSetNodeID ID; 2924 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, TTPDecl); 2925 void *InsertPos = 0; 2926 TemplateTypeParmType *TypeParm 2927 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2928 2929 if (TypeParm) 2930 return QualType(TypeParm, 0); 2931 2932 if (TTPDecl) { 2933 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2934 TypeParm = new (*this, TypeAlignment) TemplateTypeParmType(TTPDecl, Canon); 2935 2936 TemplateTypeParmType *TypeCheck 2937 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2938 assert(!TypeCheck && "Template type parameter canonical type broken"); 2939 (void)TypeCheck; 2940 } else 2941 TypeParm = new (*this, TypeAlignment) 2942 TemplateTypeParmType(Depth, Index, ParameterPack); 2943 2944 Types.push_back(TypeParm); 2945 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2946 2947 return QualType(TypeParm, 0); 2948} 2949 2950TypeSourceInfo * 2951ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2952 SourceLocation NameLoc, 2953 const TemplateArgumentListInfo &Args, 2954 QualType Underlying) const { 2955 assert(!Name.getAsDependentTemplateName() && 2956 "No dependent template names here!"); 2957 QualType TST = getTemplateSpecializationType(Name, Args, Underlying); 2958 2959 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2960 TemplateSpecializationTypeLoc TL = 2961 DI->getTypeLoc().castAs<TemplateSpecializationTypeLoc>(); 2962 TL.setTemplateKeywordLoc(SourceLocation()); 2963 TL.setTemplateNameLoc(NameLoc); 2964 TL.setLAngleLoc(Args.getLAngleLoc()); 2965 TL.setRAngleLoc(Args.getRAngleLoc()); 2966 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2967 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2968 return DI; 2969} 2970 2971QualType 2972ASTContext::getTemplateSpecializationType(TemplateName Template, 2973 const TemplateArgumentListInfo &Args, 2974 QualType Underlying) const { 2975 assert(!Template.getAsDependentTemplateName() && 2976 "No dependent template names here!"); 2977 2978 unsigned NumArgs = Args.size(); 2979 2980 SmallVector<TemplateArgument, 4> ArgVec; 2981 ArgVec.reserve(NumArgs); 2982 for (unsigned i = 0; i != NumArgs; ++i) 2983 ArgVec.push_back(Args[i].getArgument()); 2984 2985 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2986 Underlying); 2987} 2988 2989#ifndef NDEBUG 2990static bool hasAnyPackExpansions(const TemplateArgument *Args, 2991 unsigned NumArgs) { 2992 for (unsigned I = 0; I != NumArgs; ++I) 2993 if (Args[I].isPackExpansion()) 2994 return true; 2995 2996 return true; 2997} 2998#endif 2999 3000QualType 3001ASTContext::getTemplateSpecializationType(TemplateName Template, 3002 const TemplateArgument *Args, 3003 unsigned NumArgs, 3004 QualType Underlying) const { 3005 assert(!Template.getAsDependentTemplateName() && 3006 "No dependent template names here!"); 3007 // Look through qualified template names. 3008 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 3009 Template = TemplateName(QTN->getTemplateDecl()); 3010 3011 bool IsTypeAlias = 3012 Template.getAsTemplateDecl() && 3013 isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl()); 3014 QualType CanonType; 3015 if (!Underlying.isNull()) 3016 CanonType = getCanonicalType(Underlying); 3017 else { 3018 // We can get here with an alias template when the specialization contains 3019 // a pack expansion that does not match up with a parameter pack. 3020 assert((!IsTypeAlias || hasAnyPackExpansions(Args, NumArgs)) && 3021 "Caller must compute aliased type"); 3022 IsTypeAlias = false; 3023 CanonType = getCanonicalTemplateSpecializationType(Template, Args, 3024 NumArgs); 3025 } 3026 3027 // Allocate the (non-canonical) template specialization type, but don't 3028 // try to unique it: these types typically have location information that 3029 // we don't unique and don't want to lose. 3030 void *Mem = Allocate(sizeof(TemplateSpecializationType) + 3031 sizeof(TemplateArgument) * NumArgs + 3032 (IsTypeAlias? sizeof(QualType) : 0), 3033 TypeAlignment); 3034 TemplateSpecializationType *Spec 3035 = new (Mem) TemplateSpecializationType(Template, Args, NumArgs, CanonType, 3036 IsTypeAlias ? Underlying : QualType()); 3037 3038 Types.push_back(Spec); 3039 return QualType(Spec, 0); 3040} 3041 3042QualType 3043ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 3044 const TemplateArgument *Args, 3045 unsigned NumArgs) const { 3046 assert(!Template.getAsDependentTemplateName() && 3047 "No dependent template names here!"); 3048 3049 // Look through qualified template names. 3050 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 3051 Template = TemplateName(QTN->getTemplateDecl()); 3052 3053 // Build the canonical template specialization type. 3054 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 3055 SmallVector<TemplateArgument, 4> CanonArgs; 3056 CanonArgs.reserve(NumArgs); 3057 for (unsigned I = 0; I != NumArgs; ++I) 3058 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 3059 3060 // Determine whether this canonical template specialization type already 3061 // exists. 3062 llvm::FoldingSetNodeID ID; 3063 TemplateSpecializationType::Profile(ID, CanonTemplate, 3064 CanonArgs.data(), NumArgs, *this); 3065 3066 void *InsertPos = 0; 3067 TemplateSpecializationType *Spec 3068 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 3069 3070 if (!Spec) { 3071 // Allocate a new canonical template specialization type. 3072 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 3073 sizeof(TemplateArgument) * NumArgs), 3074 TypeAlignment); 3075 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 3076 CanonArgs.data(), NumArgs, 3077 QualType(), QualType()); 3078 Types.push_back(Spec); 3079 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 3080 } 3081 3082 assert(Spec->isDependentType() && 3083 "Non-dependent template-id type must have a canonical type"); 3084 return QualType(Spec, 0); 3085} 3086 3087QualType 3088ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 3089 NestedNameSpecifier *NNS, 3090 QualType NamedType) const { 3091 llvm::FoldingSetNodeID ID; 3092 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 3093 3094 void *InsertPos = 0; 3095 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 3096 if (T) 3097 return QualType(T, 0); 3098 3099 QualType Canon = NamedType; 3100 if (!Canon.isCanonical()) { 3101 Canon = getCanonicalType(NamedType); 3102 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 3103 assert(!CheckT && "Elaborated canonical type broken"); 3104 (void)CheckT; 3105 } 3106 3107 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 3108 Types.push_back(T); 3109 ElaboratedTypes.InsertNode(T, InsertPos); 3110 return QualType(T, 0); 3111} 3112 3113QualType 3114ASTContext::getParenType(QualType InnerType) const { 3115 llvm::FoldingSetNodeID ID; 3116 ParenType::Profile(ID, InnerType); 3117 3118 void *InsertPos = 0; 3119 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 3120 if (T) 3121 return QualType(T, 0); 3122 3123 QualType Canon = InnerType; 3124 if (!Canon.isCanonical()) { 3125 Canon = getCanonicalType(InnerType); 3126 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 3127 assert(!CheckT && "Paren canonical type broken"); 3128 (void)CheckT; 3129 } 3130 3131 T = new (*this) ParenType(InnerType, Canon); 3132 Types.push_back(T); 3133 ParenTypes.InsertNode(T, InsertPos); 3134 return QualType(T, 0); 3135} 3136 3137QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 3138 NestedNameSpecifier *NNS, 3139 const IdentifierInfo *Name, 3140 QualType Canon) const { 3141 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 3142 3143 if (Canon.isNull()) { 3144 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3145 ElaboratedTypeKeyword CanonKeyword = Keyword; 3146 if (Keyword == ETK_None) 3147 CanonKeyword = ETK_Typename; 3148 3149 if (CanonNNS != NNS || CanonKeyword != Keyword) 3150 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 3151 } 3152 3153 llvm::FoldingSetNodeID ID; 3154 DependentNameType::Profile(ID, Keyword, NNS, Name); 3155 3156 void *InsertPos = 0; 3157 DependentNameType *T 3158 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 3159 if (T) 3160 return QualType(T, 0); 3161 3162 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 3163 Types.push_back(T); 3164 DependentNameTypes.InsertNode(T, InsertPos); 3165 return QualType(T, 0); 3166} 3167 3168QualType 3169ASTContext::getDependentTemplateSpecializationType( 3170 ElaboratedTypeKeyword Keyword, 3171 NestedNameSpecifier *NNS, 3172 const IdentifierInfo *Name, 3173 const TemplateArgumentListInfo &Args) const { 3174 // TODO: avoid this copy 3175 SmallVector<TemplateArgument, 16> ArgCopy; 3176 for (unsigned I = 0, E = Args.size(); I != E; ++I) 3177 ArgCopy.push_back(Args[I].getArgument()); 3178 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 3179 ArgCopy.size(), 3180 ArgCopy.data()); 3181} 3182 3183QualType 3184ASTContext::getDependentTemplateSpecializationType( 3185 ElaboratedTypeKeyword Keyword, 3186 NestedNameSpecifier *NNS, 3187 const IdentifierInfo *Name, 3188 unsigned NumArgs, 3189 const TemplateArgument *Args) const { 3190 assert((!NNS || NNS->isDependent()) && 3191 "nested-name-specifier must be dependent"); 3192 3193 llvm::FoldingSetNodeID ID; 3194 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 3195 Name, NumArgs, Args); 3196 3197 void *InsertPos = 0; 3198 DependentTemplateSpecializationType *T 3199 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 3200 if (T) 3201 return QualType(T, 0); 3202 3203 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3204 3205 ElaboratedTypeKeyword CanonKeyword = Keyword; 3206 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 3207 3208 bool AnyNonCanonArgs = false; 3209 SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 3210 for (unsigned I = 0; I != NumArgs; ++I) { 3211 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 3212 if (!CanonArgs[I].structurallyEquals(Args[I])) 3213 AnyNonCanonArgs = true; 3214 } 3215 3216 QualType Canon; 3217 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 3218 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 3219 Name, NumArgs, 3220 CanonArgs.data()); 3221 3222 // Find the insert position again. 3223 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 3224 } 3225 3226 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 3227 sizeof(TemplateArgument) * NumArgs), 3228 TypeAlignment); 3229 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 3230 Name, NumArgs, Args, Canon); 3231 Types.push_back(T); 3232 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 3233 return QualType(T, 0); 3234} 3235 3236QualType ASTContext::getPackExpansionType(QualType Pattern, 3237 Optional<unsigned> NumExpansions) { 3238 llvm::FoldingSetNodeID ID; 3239 PackExpansionType::Profile(ID, Pattern, NumExpansions); 3240 3241 assert(Pattern->containsUnexpandedParameterPack() && 3242 "Pack expansions must expand one or more parameter packs"); 3243 void *InsertPos = 0; 3244 PackExpansionType *T 3245 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 3246 if (T) 3247 return QualType(T, 0); 3248 3249 QualType Canon; 3250 if (!Pattern.isCanonical()) { 3251 Canon = getCanonicalType(Pattern); 3252 // The canonical type might not contain an unexpanded parameter pack, if it 3253 // contains an alias template specialization which ignores one of its 3254 // parameters. 3255 if (Canon->containsUnexpandedParameterPack()) { 3256 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 3257 3258 // Find the insert position again, in case we inserted an element into 3259 // PackExpansionTypes and invalidated our insert position. 3260 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 3261 } 3262 } 3263 3264 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 3265 Types.push_back(T); 3266 PackExpansionTypes.InsertNode(T, InsertPos); 3267 return QualType(T, 0); 3268} 3269 3270/// CmpProtocolNames - Comparison predicate for sorting protocols 3271/// alphabetically. 3272static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 3273 const ObjCProtocolDecl *RHS) { 3274 return LHS->getDeclName() < RHS->getDeclName(); 3275} 3276 3277static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 3278 unsigned NumProtocols) { 3279 if (NumProtocols == 0) return true; 3280 3281 if (Protocols[0]->getCanonicalDecl() != Protocols[0]) 3282 return false; 3283 3284 for (unsigned i = 1; i != NumProtocols; ++i) 3285 if (!CmpProtocolNames(Protocols[i-1], Protocols[i]) || 3286 Protocols[i]->getCanonicalDecl() != Protocols[i]) 3287 return false; 3288 return true; 3289} 3290 3291static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 3292 unsigned &NumProtocols) { 3293 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 3294 3295 // Sort protocols, keyed by name. 3296 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 3297 3298 // Canonicalize. 3299 for (unsigned I = 0, N = NumProtocols; I != N; ++I) 3300 Protocols[I] = Protocols[I]->getCanonicalDecl(); 3301 3302 // Remove duplicates. 3303 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 3304 NumProtocols = ProtocolsEnd-Protocols; 3305} 3306 3307QualType ASTContext::getObjCObjectType(QualType BaseType, 3308 ObjCProtocolDecl * const *Protocols, 3309 unsigned NumProtocols) const { 3310 // If the base type is an interface and there aren't any protocols 3311 // to add, then the interface type will do just fine. 3312 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 3313 return BaseType; 3314 3315 // Look in the folding set for an existing type. 3316 llvm::FoldingSetNodeID ID; 3317 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 3318 void *InsertPos = 0; 3319 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 3320 return QualType(QT, 0); 3321 3322 // Build the canonical type, which has the canonical base type and 3323 // a sorted-and-uniqued list of protocols. 3324 QualType Canonical; 3325 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 3326 if (!ProtocolsSorted || !BaseType.isCanonical()) { 3327 if (!ProtocolsSorted) { 3328 SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 3329 Protocols + NumProtocols); 3330 unsigned UniqueCount = NumProtocols; 3331 3332 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 3333 Canonical = getObjCObjectType(getCanonicalType(BaseType), 3334 &Sorted[0], UniqueCount); 3335 } else { 3336 Canonical = getObjCObjectType(getCanonicalType(BaseType), 3337 Protocols, NumProtocols); 3338 } 3339 3340 // Regenerate InsertPos. 3341 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 3342 } 3343 3344 unsigned Size = sizeof(ObjCObjectTypeImpl); 3345 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 3346 void *Mem = Allocate(Size, TypeAlignment); 3347 ObjCObjectTypeImpl *T = 3348 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 3349 3350 Types.push_back(T); 3351 ObjCObjectTypes.InsertNode(T, InsertPos); 3352 return QualType(T, 0); 3353} 3354 3355/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 3356/// the given object type. 3357QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 3358 llvm::FoldingSetNodeID ID; 3359 ObjCObjectPointerType::Profile(ID, ObjectT); 3360 3361 void *InsertPos = 0; 3362 if (ObjCObjectPointerType *QT = 3363 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 3364 return QualType(QT, 0); 3365 3366 // Find the canonical object type. 3367 QualType Canonical; 3368 if (!ObjectT.isCanonical()) { 3369 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 3370 3371 // Regenerate InsertPos. 3372 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 3373 } 3374 3375 // No match. 3376 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 3377 ObjCObjectPointerType *QType = 3378 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 3379 3380 Types.push_back(QType); 3381 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 3382 return QualType(QType, 0); 3383} 3384 3385/// getObjCInterfaceType - Return the unique reference to the type for the 3386/// specified ObjC interface decl. The list of protocols is optional. 3387QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 3388 ObjCInterfaceDecl *PrevDecl) const { 3389 if (Decl->TypeForDecl) 3390 return QualType(Decl->TypeForDecl, 0); 3391 3392 if (PrevDecl) { 3393 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 3394 Decl->TypeForDecl = PrevDecl->TypeForDecl; 3395 return QualType(PrevDecl->TypeForDecl, 0); 3396 } 3397 3398 // Prefer the definition, if there is one. 3399 if (const ObjCInterfaceDecl *Def = Decl->getDefinition()) 3400 Decl = Def; 3401 3402 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 3403 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 3404 Decl->TypeForDecl = T; 3405 Types.push_back(T); 3406 return QualType(T, 0); 3407} 3408 3409/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 3410/// TypeOfExprType AST's (since expression's are never shared). For example, 3411/// multiple declarations that refer to "typeof(x)" all contain different 3412/// DeclRefExpr's. This doesn't effect the type checker, since it operates 3413/// on canonical type's (which are always unique). 3414QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 3415 TypeOfExprType *toe; 3416 if (tofExpr->isTypeDependent()) { 3417 llvm::FoldingSetNodeID ID; 3418 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 3419 3420 void *InsertPos = 0; 3421 DependentTypeOfExprType *Canon 3422 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 3423 if (Canon) { 3424 // We already have a "canonical" version of an identical, dependent 3425 // typeof(expr) type. Use that as our canonical type. 3426 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 3427 QualType((TypeOfExprType*)Canon, 0)); 3428 } else { 3429 // Build a new, canonical typeof(expr) type. 3430 Canon 3431 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 3432 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 3433 toe = Canon; 3434 } 3435 } else { 3436 QualType Canonical = getCanonicalType(tofExpr->getType()); 3437 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 3438 } 3439 Types.push_back(toe); 3440 return QualType(toe, 0); 3441} 3442 3443/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 3444/// TypeOfType AST's. The only motivation to unique these nodes would be 3445/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 3446/// an issue. This doesn't effect the type checker, since it operates 3447/// on canonical type's (which are always unique). 3448QualType ASTContext::getTypeOfType(QualType tofType) const { 3449 QualType Canonical = getCanonicalType(tofType); 3450 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 3451 Types.push_back(tot); 3452 return QualType(tot, 0); 3453} 3454 3455 3456/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 3457/// DecltypeType AST's. The only motivation to unique these nodes would be 3458/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 3459/// an issue. This doesn't effect the type checker, since it operates 3460/// on canonical types (which are always unique). 3461QualType ASTContext::getDecltypeType(Expr *e, QualType UnderlyingType) const { 3462 DecltypeType *dt; 3463 3464 // C++0x [temp.type]p2: 3465 // If an expression e involves a template parameter, decltype(e) denotes a 3466 // unique dependent type. Two such decltype-specifiers refer to the same 3467 // type only if their expressions are equivalent (14.5.6.1). 3468 if (e->isInstantiationDependent()) { 3469 llvm::FoldingSetNodeID ID; 3470 DependentDecltypeType::Profile(ID, *this, e); 3471 3472 void *InsertPos = 0; 3473 DependentDecltypeType *Canon 3474 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 3475 if (Canon) { 3476 // We already have a "canonical" version of an equivalent, dependent 3477 // decltype type. Use that as our canonical type. 3478 dt = new (*this, TypeAlignment) DecltypeType(e, UnderlyingType, 3479 QualType((DecltypeType*)Canon, 0)); 3480 } else { 3481 // Build a new, canonical typeof(expr) type. 3482 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 3483 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 3484 dt = Canon; 3485 } 3486 } else { 3487 dt = new (*this, TypeAlignment) DecltypeType(e, UnderlyingType, 3488 getCanonicalType(UnderlyingType)); 3489 } 3490 Types.push_back(dt); 3491 return QualType(dt, 0); 3492} 3493 3494/// getUnaryTransformationType - We don't unique these, since the memory 3495/// savings are minimal and these are rare. 3496QualType ASTContext::getUnaryTransformType(QualType BaseType, 3497 QualType UnderlyingType, 3498 UnaryTransformType::UTTKind Kind) 3499 const { 3500 UnaryTransformType *Ty = 3501 new (*this, TypeAlignment) UnaryTransformType (BaseType, UnderlyingType, 3502 Kind, 3503 UnderlyingType->isDependentType() ? 3504 QualType() : getCanonicalType(UnderlyingType)); 3505 Types.push_back(Ty); 3506 return QualType(Ty, 0); 3507} 3508 3509/// getAutoType - We only unique auto types after they've been deduced. 3510QualType ASTContext::getAutoType(QualType DeducedType) const { 3511 void *InsertPos = 0; 3512 if (!DeducedType.isNull()) { 3513 // Look in the folding set for an existing type. 3514 llvm::FoldingSetNodeID ID; 3515 AutoType::Profile(ID, DeducedType); 3516 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 3517 return QualType(AT, 0); 3518 } 3519 3520 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 3521 Types.push_back(AT); 3522 if (InsertPos) 3523 AutoTypes.InsertNode(AT, InsertPos); 3524 return QualType(AT, 0); 3525} 3526 3527/// getAtomicType - Return the uniqued reference to the atomic type for 3528/// the given value type. 3529QualType ASTContext::getAtomicType(QualType T) const { 3530 // Unique pointers, to guarantee there is only one pointer of a particular 3531 // structure. 3532 llvm::FoldingSetNodeID ID; 3533 AtomicType::Profile(ID, T); 3534 3535 void *InsertPos = 0; 3536 if (AtomicType *AT = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos)) 3537 return QualType(AT, 0); 3538 3539 // If the atomic value type isn't canonical, this won't be a canonical type 3540 // either, so fill in the canonical type field. 3541 QualType Canonical; 3542 if (!T.isCanonical()) { 3543 Canonical = getAtomicType(getCanonicalType(T)); 3544 3545 // Get the new insert position for the node we care about. 3546 AtomicType *NewIP = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos); 3547 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 3548 } 3549 AtomicType *New = new (*this, TypeAlignment) AtomicType(T, Canonical); 3550 Types.push_back(New); 3551 AtomicTypes.InsertNode(New, InsertPos); 3552 return QualType(New, 0); 3553} 3554 3555/// getAutoDeductType - Get type pattern for deducing against 'auto'. 3556QualType ASTContext::getAutoDeductType() const { 3557 if (AutoDeductTy.isNull()) 3558 AutoDeductTy = getAutoType(QualType()); 3559 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern"); 3560 return AutoDeductTy; 3561} 3562 3563/// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'. 3564QualType ASTContext::getAutoRRefDeductType() const { 3565 if (AutoRRefDeductTy.isNull()) 3566 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType()); 3567 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern"); 3568 return AutoRRefDeductTy; 3569} 3570 3571/// getTagDeclType - Return the unique reference to the type for the 3572/// specified TagDecl (struct/union/class/enum) decl. 3573QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 3574 assert (Decl); 3575 // FIXME: What is the design on getTagDeclType when it requires casting 3576 // away const? mutable? 3577 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 3578} 3579 3580/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 3581/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 3582/// needs to agree with the definition in <stddef.h>. 3583CanQualType ASTContext::getSizeType() const { 3584 return getFromTargetType(Target->getSizeType()); 3585} 3586 3587/// getIntMaxType - Return the unique type for "intmax_t" (C99 7.18.1.5). 3588CanQualType ASTContext::getIntMaxType() const { 3589 return getFromTargetType(Target->getIntMaxType()); 3590} 3591 3592/// getUIntMaxType - Return the unique type for "uintmax_t" (C99 7.18.1.5). 3593CanQualType ASTContext::getUIntMaxType() const { 3594 return getFromTargetType(Target->getUIntMaxType()); 3595} 3596 3597/// getSignedWCharType - Return the type of "signed wchar_t". 3598/// Used when in C++, as a GCC extension. 3599QualType ASTContext::getSignedWCharType() const { 3600 // FIXME: derive from "Target" ? 3601 return WCharTy; 3602} 3603 3604/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 3605/// Used when in C++, as a GCC extension. 3606QualType ASTContext::getUnsignedWCharType() const { 3607 // FIXME: derive from "Target" ? 3608 return UnsignedIntTy; 3609} 3610 3611QualType ASTContext::getIntPtrType() const { 3612 return getFromTargetType(Target->getIntPtrType()); 3613} 3614 3615QualType ASTContext::getUIntPtrType() const { 3616 return getCorrespondingUnsignedType(getIntPtrType()); 3617} 3618 3619/// getPointerDiffType - Return the unique type for "ptrdiff_t" (C99 7.17) 3620/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 3621QualType ASTContext::getPointerDiffType() const { 3622 return getFromTargetType(Target->getPtrDiffType(0)); 3623} 3624 3625/// \brief Return the unique type for "pid_t" defined in 3626/// <sys/types.h>. We need this to compute the correct type for vfork(). 3627QualType ASTContext::getProcessIDType() const { 3628 return getFromTargetType(Target->getProcessIDType()); 3629} 3630 3631//===----------------------------------------------------------------------===// 3632// Type Operators 3633//===----------------------------------------------------------------------===// 3634 3635CanQualType ASTContext::getCanonicalParamType(QualType T) const { 3636 // Push qualifiers into arrays, and then discard any remaining 3637 // qualifiers. 3638 T = getCanonicalType(T); 3639 T = getVariableArrayDecayedType(T); 3640 const Type *Ty = T.getTypePtr(); 3641 QualType Result; 3642 if (isa<ArrayType>(Ty)) { 3643 Result = getArrayDecayedType(QualType(Ty,0)); 3644 } else if (isa<FunctionType>(Ty)) { 3645 Result = getPointerType(QualType(Ty, 0)); 3646 } else { 3647 Result = QualType(Ty, 0); 3648 } 3649 3650 return CanQualType::CreateUnsafe(Result); 3651} 3652 3653QualType ASTContext::getUnqualifiedArrayType(QualType type, 3654 Qualifiers &quals) { 3655 SplitQualType splitType = type.getSplitUnqualifiedType(); 3656 3657 // FIXME: getSplitUnqualifiedType() actually walks all the way to 3658 // the unqualified desugared type and then drops it on the floor. 3659 // We then have to strip that sugar back off with 3660 // getUnqualifiedDesugaredType(), which is silly. 3661 const ArrayType *AT = 3662 dyn_cast<ArrayType>(splitType.Ty->getUnqualifiedDesugaredType()); 3663 3664 // If we don't have an array, just use the results in splitType. 3665 if (!AT) { 3666 quals = splitType.Quals; 3667 return QualType(splitType.Ty, 0); 3668 } 3669 3670 // Otherwise, recurse on the array's element type. 3671 QualType elementType = AT->getElementType(); 3672 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 3673 3674 // If that didn't change the element type, AT has no qualifiers, so we 3675 // can just use the results in splitType. 3676 if (elementType == unqualElementType) { 3677 assert(quals.empty()); // from the recursive call 3678 quals = splitType.Quals; 3679 return QualType(splitType.Ty, 0); 3680 } 3681 3682 // Otherwise, add in the qualifiers from the outermost type, then 3683 // build the type back up. 3684 quals.addConsistentQualifiers(splitType.Quals); 3685 3686 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 3687 return getConstantArrayType(unqualElementType, CAT->getSize(), 3688 CAT->getSizeModifier(), 0); 3689 } 3690 3691 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 3692 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 3693 } 3694 3695 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 3696 return getVariableArrayType(unqualElementType, 3697 VAT->getSizeExpr(), 3698 VAT->getSizeModifier(), 3699 VAT->getIndexTypeCVRQualifiers(), 3700 VAT->getBracketsRange()); 3701 } 3702 3703 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 3704 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 3705 DSAT->getSizeModifier(), 0, 3706 SourceRange()); 3707} 3708 3709/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 3710/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 3711/// they point to and return true. If T1 and T2 aren't pointer types 3712/// or pointer-to-member types, or if they are not similar at this 3713/// level, returns false and leaves T1 and T2 unchanged. Top-level 3714/// qualifiers on T1 and T2 are ignored. This function will typically 3715/// be called in a loop that successively "unwraps" pointer and 3716/// pointer-to-member types to compare them at each level. 3717bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 3718 const PointerType *T1PtrType = T1->getAs<PointerType>(), 3719 *T2PtrType = T2->getAs<PointerType>(); 3720 if (T1PtrType && T2PtrType) { 3721 T1 = T1PtrType->getPointeeType(); 3722 T2 = T2PtrType->getPointeeType(); 3723 return true; 3724 } 3725 3726 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 3727 *T2MPType = T2->getAs<MemberPointerType>(); 3728 if (T1MPType && T2MPType && 3729 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 3730 QualType(T2MPType->getClass(), 0))) { 3731 T1 = T1MPType->getPointeeType(); 3732 T2 = T2MPType->getPointeeType(); 3733 return true; 3734 } 3735 3736 if (getLangOpts().ObjC1) { 3737 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 3738 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 3739 if (T1OPType && T2OPType) { 3740 T1 = T1OPType->getPointeeType(); 3741 T2 = T2OPType->getPointeeType(); 3742 return true; 3743 } 3744 } 3745 3746 // FIXME: Block pointers, too? 3747 3748 return false; 3749} 3750 3751DeclarationNameInfo 3752ASTContext::getNameForTemplate(TemplateName Name, 3753 SourceLocation NameLoc) const { 3754 switch (Name.getKind()) { 3755 case TemplateName::QualifiedTemplate: 3756 case TemplateName::Template: 3757 // DNInfo work in progress: CHECKME: what about DNLoc? 3758 return DeclarationNameInfo(Name.getAsTemplateDecl()->getDeclName(), 3759 NameLoc); 3760 3761 case TemplateName::OverloadedTemplate: { 3762 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 3763 // DNInfo work in progress: CHECKME: what about DNLoc? 3764 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 3765 } 3766 3767 case TemplateName::DependentTemplate: { 3768 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3769 DeclarationName DName; 3770 if (DTN->isIdentifier()) { 3771 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 3772 return DeclarationNameInfo(DName, NameLoc); 3773 } else { 3774 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 3775 // DNInfo work in progress: FIXME: source locations? 3776 DeclarationNameLoc DNLoc; 3777 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 3778 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 3779 return DeclarationNameInfo(DName, NameLoc, DNLoc); 3780 } 3781 } 3782 3783 case TemplateName::SubstTemplateTemplateParm: { 3784 SubstTemplateTemplateParmStorage *subst 3785 = Name.getAsSubstTemplateTemplateParm(); 3786 return DeclarationNameInfo(subst->getParameter()->getDeclName(), 3787 NameLoc); 3788 } 3789 3790 case TemplateName::SubstTemplateTemplateParmPack: { 3791 SubstTemplateTemplateParmPackStorage *subst 3792 = Name.getAsSubstTemplateTemplateParmPack(); 3793 return DeclarationNameInfo(subst->getParameterPack()->getDeclName(), 3794 NameLoc); 3795 } 3796 } 3797 3798 llvm_unreachable("bad template name kind!"); 3799} 3800 3801TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 3802 switch (Name.getKind()) { 3803 case TemplateName::QualifiedTemplate: 3804 case TemplateName::Template: { 3805 TemplateDecl *Template = Name.getAsTemplateDecl(); 3806 if (TemplateTemplateParmDecl *TTP 3807 = dyn_cast<TemplateTemplateParmDecl>(Template)) 3808 Template = getCanonicalTemplateTemplateParmDecl(TTP); 3809 3810 // The canonical template name is the canonical template declaration. 3811 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 3812 } 3813 3814 case TemplateName::OverloadedTemplate: 3815 llvm_unreachable("cannot canonicalize overloaded template"); 3816 3817 case TemplateName::DependentTemplate: { 3818 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3819 assert(DTN && "Non-dependent template names must refer to template decls."); 3820 return DTN->CanonicalTemplateName; 3821 } 3822 3823 case TemplateName::SubstTemplateTemplateParm: { 3824 SubstTemplateTemplateParmStorage *subst 3825 = Name.getAsSubstTemplateTemplateParm(); 3826 return getCanonicalTemplateName(subst->getReplacement()); 3827 } 3828 3829 case TemplateName::SubstTemplateTemplateParmPack: { 3830 SubstTemplateTemplateParmPackStorage *subst 3831 = Name.getAsSubstTemplateTemplateParmPack(); 3832 TemplateTemplateParmDecl *canonParameter 3833 = getCanonicalTemplateTemplateParmDecl(subst->getParameterPack()); 3834 TemplateArgument canonArgPack 3835 = getCanonicalTemplateArgument(subst->getArgumentPack()); 3836 return getSubstTemplateTemplateParmPack(canonParameter, canonArgPack); 3837 } 3838 } 3839 3840 llvm_unreachable("bad template name!"); 3841} 3842 3843bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 3844 X = getCanonicalTemplateName(X); 3845 Y = getCanonicalTemplateName(Y); 3846 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 3847} 3848 3849TemplateArgument 3850ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 3851 switch (Arg.getKind()) { 3852 case TemplateArgument::Null: 3853 return Arg; 3854 3855 case TemplateArgument::Expression: 3856 return Arg; 3857 3858 case TemplateArgument::Declaration: { 3859 ValueDecl *D = cast<ValueDecl>(Arg.getAsDecl()->getCanonicalDecl()); 3860 return TemplateArgument(D, Arg.isDeclForReferenceParam()); 3861 } 3862 3863 case TemplateArgument::NullPtr: 3864 return TemplateArgument(getCanonicalType(Arg.getNullPtrType()), 3865 /*isNullPtr*/true); 3866 3867 case TemplateArgument::Template: 3868 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 3869 3870 case TemplateArgument::TemplateExpansion: 3871 return TemplateArgument(getCanonicalTemplateName( 3872 Arg.getAsTemplateOrTemplatePattern()), 3873 Arg.getNumTemplateExpansions()); 3874 3875 case TemplateArgument::Integral: 3876 return TemplateArgument(Arg, getCanonicalType(Arg.getIntegralType())); 3877 3878 case TemplateArgument::Type: 3879 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3880 3881 case TemplateArgument::Pack: { 3882 if (Arg.pack_size() == 0) 3883 return Arg; 3884 3885 TemplateArgument *CanonArgs 3886 = new (*this) TemplateArgument[Arg.pack_size()]; 3887 unsigned Idx = 0; 3888 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3889 AEnd = Arg.pack_end(); 3890 A != AEnd; (void)++A, ++Idx) 3891 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3892 3893 return TemplateArgument(CanonArgs, Arg.pack_size()); 3894 } 3895 } 3896 3897 // Silence GCC warning 3898 llvm_unreachable("Unhandled template argument kind"); 3899} 3900 3901NestedNameSpecifier * 3902ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3903 if (!NNS) 3904 return 0; 3905 3906 switch (NNS->getKind()) { 3907 case NestedNameSpecifier::Identifier: 3908 // Canonicalize the prefix but keep the identifier the same. 3909 return NestedNameSpecifier::Create(*this, 3910 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3911 NNS->getAsIdentifier()); 3912 3913 case NestedNameSpecifier::Namespace: 3914 // A namespace is canonical; build a nested-name-specifier with 3915 // this namespace and no prefix. 3916 return NestedNameSpecifier::Create(*this, 0, 3917 NNS->getAsNamespace()->getOriginalNamespace()); 3918 3919 case NestedNameSpecifier::NamespaceAlias: 3920 // A namespace is canonical; build a nested-name-specifier with 3921 // this namespace and no prefix. 3922 return NestedNameSpecifier::Create(*this, 0, 3923 NNS->getAsNamespaceAlias()->getNamespace() 3924 ->getOriginalNamespace()); 3925 3926 case NestedNameSpecifier::TypeSpec: 3927 case NestedNameSpecifier::TypeSpecWithTemplate: { 3928 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3929 3930 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3931 // break it apart into its prefix and identifier, then reconsititute those 3932 // as the canonical nested-name-specifier. This is required to canonicalize 3933 // a dependent nested-name-specifier involving typedefs of dependent-name 3934 // types, e.g., 3935 // typedef typename T::type T1; 3936 // typedef typename T1::type T2; 3937 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) 3938 return NestedNameSpecifier::Create(*this, DNT->getQualifier(), 3939 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3940 3941 // Otherwise, just canonicalize the type, and force it to be a TypeSpec. 3942 // FIXME: Why are TypeSpec and TypeSpecWithTemplate distinct in the 3943 // first place? 3944 return NestedNameSpecifier::Create(*this, 0, false, 3945 const_cast<Type*>(T.getTypePtr())); 3946 } 3947 3948 case NestedNameSpecifier::Global: 3949 // The global specifier is canonical and unique. 3950 return NNS; 3951 } 3952 3953 llvm_unreachable("Invalid NestedNameSpecifier::Kind!"); 3954} 3955 3956 3957const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3958 // Handle the non-qualified case efficiently. 3959 if (!T.hasLocalQualifiers()) { 3960 // Handle the common positive case fast. 3961 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3962 return AT; 3963 } 3964 3965 // Handle the common negative case fast. 3966 if (!isa<ArrayType>(T.getCanonicalType())) 3967 return 0; 3968 3969 // Apply any qualifiers from the array type to the element type. This 3970 // implements C99 6.7.3p8: "If the specification of an array type includes 3971 // any type qualifiers, the element type is so qualified, not the array type." 3972 3973 // If we get here, we either have type qualifiers on the type, or we have 3974 // sugar such as a typedef in the way. If we have type qualifiers on the type 3975 // we must propagate them down into the element type. 3976 3977 SplitQualType split = T.getSplitDesugaredType(); 3978 Qualifiers qs = split.Quals; 3979 3980 // If we have a simple case, just return now. 3981 const ArrayType *ATy = dyn_cast<ArrayType>(split.Ty); 3982 if (ATy == 0 || qs.empty()) 3983 return ATy; 3984 3985 // Otherwise, we have an array and we have qualifiers on it. Push the 3986 // qualifiers into the array element type and return a new array type. 3987 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3988 3989 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3990 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3991 CAT->getSizeModifier(), 3992 CAT->getIndexTypeCVRQualifiers())); 3993 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3994 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3995 IAT->getSizeModifier(), 3996 IAT->getIndexTypeCVRQualifiers())); 3997 3998 if (const DependentSizedArrayType *DSAT 3999 = dyn_cast<DependentSizedArrayType>(ATy)) 4000 return cast<ArrayType>( 4001 getDependentSizedArrayType(NewEltTy, 4002 DSAT->getSizeExpr(), 4003 DSAT->getSizeModifier(), 4004 DSAT->getIndexTypeCVRQualifiers(), 4005 DSAT->getBracketsRange())); 4006 4007 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 4008 return cast<ArrayType>(getVariableArrayType(NewEltTy, 4009 VAT->getSizeExpr(), 4010 VAT->getSizeModifier(), 4011 VAT->getIndexTypeCVRQualifiers(), 4012 VAT->getBracketsRange())); 4013} 4014 4015QualType ASTContext::getAdjustedParameterType(QualType T) const { 4016 // C99 6.7.5.3p7: 4017 // A declaration of a parameter as "array of type" shall be 4018 // adjusted to "qualified pointer to type", where the type 4019 // qualifiers (if any) are those specified within the [ and ] of 4020 // the array type derivation. 4021 if (T->isArrayType()) 4022 return getArrayDecayedType(T); 4023 4024 // C99 6.7.5.3p8: 4025 // A declaration of a parameter as "function returning type" 4026 // shall be adjusted to "pointer to function returning type", as 4027 // in 6.3.2.1. 4028 if (T->isFunctionType()) 4029 return getPointerType(T); 4030 4031 return T; 4032} 4033 4034QualType ASTContext::getSignatureParameterType(QualType T) const { 4035 T = getVariableArrayDecayedType(T); 4036 T = getAdjustedParameterType(T); 4037 return T.getUnqualifiedType(); 4038} 4039 4040/// getArrayDecayedType - Return the properly qualified result of decaying the 4041/// specified array type to a pointer. This operation is non-trivial when 4042/// handling typedefs etc. The canonical type of "T" must be an array type, 4043/// this returns a pointer to a properly qualified element of the array. 4044/// 4045/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 4046QualType ASTContext::getArrayDecayedType(QualType Ty) const { 4047 // Get the element type with 'getAsArrayType' so that we don't lose any 4048 // typedefs in the element type of the array. This also handles propagation 4049 // of type qualifiers from the array type into the element type if present 4050 // (C99 6.7.3p8). 4051 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 4052 assert(PrettyArrayType && "Not an array type!"); 4053 4054 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 4055 4056 // int x[restrict 4] -> int *restrict 4057 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 4058} 4059 4060QualType ASTContext::getBaseElementType(const ArrayType *array) const { 4061 return getBaseElementType(array->getElementType()); 4062} 4063 4064QualType ASTContext::getBaseElementType(QualType type) const { 4065 Qualifiers qs; 4066 while (true) { 4067 SplitQualType split = type.getSplitDesugaredType(); 4068 const ArrayType *array = split.Ty->getAsArrayTypeUnsafe(); 4069 if (!array) break; 4070 4071 type = array->getElementType(); 4072 qs.addConsistentQualifiers(split.Quals); 4073 } 4074 4075 return getQualifiedType(type, qs); 4076} 4077 4078/// getConstantArrayElementCount - Returns number of constant array elements. 4079uint64_t 4080ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 4081 uint64_t ElementCount = 1; 4082 do { 4083 ElementCount *= CA->getSize().getZExtValue(); 4084 CA = dyn_cast_or_null<ConstantArrayType>( 4085 CA->getElementType()->getAsArrayTypeUnsafe()); 4086 } while (CA); 4087 return ElementCount; 4088} 4089 4090/// getFloatingRank - Return a relative rank for floating point types. 4091/// This routine will assert if passed a built-in type that isn't a float. 4092static FloatingRank getFloatingRank(QualType T) { 4093 if (const ComplexType *CT = T->getAs<ComplexType>()) 4094 return getFloatingRank(CT->getElementType()); 4095 4096 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 4097 switch (T->getAs<BuiltinType>()->getKind()) { 4098 default: llvm_unreachable("getFloatingRank(): not a floating type"); 4099 case BuiltinType::Half: return HalfRank; 4100 case BuiltinType::Float: return FloatRank; 4101 case BuiltinType::Double: return DoubleRank; 4102 case BuiltinType::LongDouble: return LongDoubleRank; 4103 } 4104} 4105 4106/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 4107/// point or a complex type (based on typeDomain/typeSize). 4108/// 'typeDomain' is a real floating point or complex type. 4109/// 'typeSize' is a real floating point or complex type. 4110QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 4111 QualType Domain) const { 4112 FloatingRank EltRank = getFloatingRank(Size); 4113 if (Domain->isComplexType()) { 4114 switch (EltRank) { 4115 case HalfRank: llvm_unreachable("Complex half is not supported"); 4116 case FloatRank: return FloatComplexTy; 4117 case DoubleRank: return DoubleComplexTy; 4118 case LongDoubleRank: return LongDoubleComplexTy; 4119 } 4120 } 4121 4122 assert(Domain->isRealFloatingType() && "Unknown domain!"); 4123 switch (EltRank) { 4124 case HalfRank: return HalfTy; 4125 case FloatRank: return FloatTy; 4126 case DoubleRank: return DoubleTy; 4127 case LongDoubleRank: return LongDoubleTy; 4128 } 4129 llvm_unreachable("getFloatingRank(): illegal value for rank"); 4130} 4131 4132/// getFloatingTypeOrder - Compare the rank of the two specified floating 4133/// point types, ignoring the domain of the type (i.e. 'double' == 4134/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 4135/// LHS < RHS, return -1. 4136int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 4137 FloatingRank LHSR = getFloatingRank(LHS); 4138 FloatingRank RHSR = getFloatingRank(RHS); 4139 4140 if (LHSR == RHSR) 4141 return 0; 4142 if (LHSR > RHSR) 4143 return 1; 4144 return -1; 4145} 4146 4147/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 4148/// routine will assert if passed a built-in type that isn't an integer or enum, 4149/// or if it is not canonicalized. 4150unsigned ASTContext::getIntegerRank(const Type *T) const { 4151 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 4152 4153 switch (cast<BuiltinType>(T)->getKind()) { 4154 default: llvm_unreachable("getIntegerRank(): not a built-in integer"); 4155 case BuiltinType::Bool: 4156 return 1 + (getIntWidth(BoolTy) << 3); 4157 case BuiltinType::Char_S: 4158 case BuiltinType::Char_U: 4159 case BuiltinType::SChar: 4160 case BuiltinType::UChar: 4161 return 2 + (getIntWidth(CharTy) << 3); 4162 case BuiltinType::Short: 4163 case BuiltinType::UShort: 4164 return 3 + (getIntWidth(ShortTy) << 3); 4165 case BuiltinType::Int: 4166 case BuiltinType::UInt: 4167 return 4 + (getIntWidth(IntTy) << 3); 4168 case BuiltinType::Long: 4169 case BuiltinType::ULong: 4170 return 5 + (getIntWidth(LongTy) << 3); 4171 case BuiltinType::LongLong: 4172 case BuiltinType::ULongLong: 4173 return 6 + (getIntWidth(LongLongTy) << 3); 4174 case BuiltinType::Int128: 4175 case BuiltinType::UInt128: 4176 return 7 + (getIntWidth(Int128Ty) << 3); 4177 } 4178} 4179 4180/// \brief Whether this is a promotable bitfield reference according 4181/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 4182/// 4183/// \returns the type this bit-field will promote to, or NULL if no 4184/// promotion occurs. 4185QualType ASTContext::isPromotableBitField(Expr *E) const { 4186 if (E->isTypeDependent() || E->isValueDependent()) 4187 return QualType(); 4188 4189 FieldDecl *Field = E->getBitField(); 4190 if (!Field) 4191 return QualType(); 4192 4193 QualType FT = Field->getType(); 4194 4195 uint64_t BitWidth = Field->getBitWidthValue(*this); 4196 uint64_t IntSize = getTypeSize(IntTy); 4197 // GCC extension compatibility: if the bit-field size is less than or equal 4198 // to the size of int, it gets promoted no matter what its type is. 4199 // For instance, unsigned long bf : 4 gets promoted to signed int. 4200 if (BitWidth < IntSize) 4201 return IntTy; 4202 4203 if (BitWidth == IntSize) 4204 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 4205 4206 // Types bigger than int are not subject to promotions, and therefore act 4207 // like the base type. 4208 // FIXME: This doesn't quite match what gcc does, but what gcc does here 4209 // is ridiculous. 4210 return QualType(); 4211} 4212 4213/// getPromotedIntegerType - Returns the type that Promotable will 4214/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 4215/// integer type. 4216QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 4217 assert(!Promotable.isNull()); 4218 assert(Promotable->isPromotableIntegerType()); 4219 if (const EnumType *ET = Promotable->getAs<EnumType>()) 4220 return ET->getDecl()->getPromotionType(); 4221 4222 if (const BuiltinType *BT = Promotable->getAs<BuiltinType>()) { 4223 // C++ [conv.prom]: A prvalue of type char16_t, char32_t, or wchar_t 4224 // (3.9.1) can be converted to a prvalue of the first of the following 4225 // types that can represent all the values of its underlying type: 4226 // int, unsigned int, long int, unsigned long int, long long int, or 4227 // unsigned long long int [...] 4228 // FIXME: Is there some better way to compute this? 4229 if (BT->getKind() == BuiltinType::WChar_S || 4230 BT->getKind() == BuiltinType::WChar_U || 4231 BT->getKind() == BuiltinType::Char16 || 4232 BT->getKind() == BuiltinType::Char32) { 4233 bool FromIsSigned = BT->getKind() == BuiltinType::WChar_S; 4234 uint64_t FromSize = getTypeSize(BT); 4235 QualType PromoteTypes[] = { IntTy, UnsignedIntTy, LongTy, UnsignedLongTy, 4236 LongLongTy, UnsignedLongLongTy }; 4237 for (size_t Idx = 0; Idx < llvm::array_lengthof(PromoteTypes); ++Idx) { 4238 uint64_t ToSize = getTypeSize(PromoteTypes[Idx]); 4239 if (FromSize < ToSize || 4240 (FromSize == ToSize && 4241 FromIsSigned == PromoteTypes[Idx]->isSignedIntegerType())) 4242 return PromoteTypes[Idx]; 4243 } 4244 llvm_unreachable("char type should fit into long long"); 4245 } 4246 } 4247 4248 // At this point, we should have a signed or unsigned integer type. 4249 if (Promotable->isSignedIntegerType()) 4250 return IntTy; 4251 uint64_t PromotableSize = getIntWidth(Promotable); 4252 uint64_t IntSize = getIntWidth(IntTy); 4253 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 4254 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 4255} 4256 4257/// \brief Recurses in pointer/array types until it finds an objc retainable 4258/// type and returns its ownership. 4259Qualifiers::ObjCLifetime ASTContext::getInnerObjCOwnership(QualType T) const { 4260 while (!T.isNull()) { 4261 if (T.getObjCLifetime() != Qualifiers::OCL_None) 4262 return T.getObjCLifetime(); 4263 if (T->isArrayType()) 4264 T = getBaseElementType(T); 4265 else if (const PointerType *PT = T->getAs<PointerType>()) 4266 T = PT->getPointeeType(); 4267 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4268 T = RT->getPointeeType(); 4269 else 4270 break; 4271 } 4272 4273 return Qualifiers::OCL_None; 4274} 4275 4276/// getIntegerTypeOrder - Returns the highest ranked integer type: 4277/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 4278/// LHS < RHS, return -1. 4279int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 4280 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 4281 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 4282 if (LHSC == RHSC) return 0; 4283 4284 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 4285 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 4286 4287 unsigned LHSRank = getIntegerRank(LHSC); 4288 unsigned RHSRank = getIntegerRank(RHSC); 4289 4290 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 4291 if (LHSRank == RHSRank) return 0; 4292 return LHSRank > RHSRank ? 1 : -1; 4293 } 4294 4295 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 4296 if (LHSUnsigned) { 4297 // If the unsigned [LHS] type is larger, return it. 4298 if (LHSRank >= RHSRank) 4299 return 1; 4300 4301 // If the signed type can represent all values of the unsigned type, it 4302 // wins. Because we are dealing with 2's complement and types that are 4303 // powers of two larger than each other, this is always safe. 4304 return -1; 4305 } 4306 4307 // If the unsigned [RHS] type is larger, return it. 4308 if (RHSRank >= LHSRank) 4309 return -1; 4310 4311 // If the signed type can represent all values of the unsigned type, it 4312 // wins. Because we are dealing with 2's complement and types that are 4313 // powers of two larger than each other, this is always safe. 4314 return 1; 4315} 4316 4317static RecordDecl * 4318CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 4319 DeclContext *DC, IdentifierInfo *Id) { 4320 SourceLocation Loc; 4321 if (Ctx.getLangOpts().CPlusPlus) 4322 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 4323 else 4324 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 4325} 4326 4327// getCFConstantStringType - Return the type used for constant CFStrings. 4328QualType ASTContext::getCFConstantStringType() const { 4329 if (!CFConstantStringTypeDecl) { 4330 CFConstantStringTypeDecl = 4331 CreateRecordDecl(*this, TTK_Struct, TUDecl, 4332 &Idents.get("NSConstantString")); 4333 CFConstantStringTypeDecl->startDefinition(); 4334 4335 QualType FieldTypes[4]; 4336 4337 // const int *isa; 4338 FieldTypes[0] = getPointerType(IntTy.withConst()); 4339 // int flags; 4340 FieldTypes[1] = IntTy; 4341 // const char *str; 4342 FieldTypes[2] = getPointerType(CharTy.withConst()); 4343 // long length; 4344 FieldTypes[3] = LongTy; 4345 4346 // Create fields 4347 for (unsigned i = 0; i < 4; ++i) { 4348 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 4349 SourceLocation(), 4350 SourceLocation(), 0, 4351 FieldTypes[i], /*TInfo=*/0, 4352 /*BitWidth=*/0, 4353 /*Mutable=*/false, 4354 ICIS_NoInit); 4355 Field->setAccess(AS_public); 4356 CFConstantStringTypeDecl->addDecl(Field); 4357 } 4358 4359 CFConstantStringTypeDecl->completeDefinition(); 4360 } 4361 4362 return getTagDeclType(CFConstantStringTypeDecl); 4363} 4364 4365QualType ASTContext::getObjCSuperType() const { 4366 if (ObjCSuperType.isNull()) { 4367 RecordDecl *ObjCSuperTypeDecl = 4368 CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get("objc_super")); 4369 TUDecl->addDecl(ObjCSuperTypeDecl); 4370 ObjCSuperType = getTagDeclType(ObjCSuperTypeDecl); 4371 } 4372 return ObjCSuperType; 4373} 4374 4375void ASTContext::setCFConstantStringType(QualType T) { 4376 const RecordType *Rec = T->getAs<RecordType>(); 4377 assert(Rec && "Invalid CFConstantStringType"); 4378 CFConstantStringTypeDecl = Rec->getDecl(); 4379} 4380 4381QualType ASTContext::getBlockDescriptorType() const { 4382 if (BlockDescriptorType) 4383 return getTagDeclType(BlockDescriptorType); 4384 4385 RecordDecl *T; 4386 // FIXME: Needs the FlagAppleBlock bit. 4387 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 4388 &Idents.get("__block_descriptor")); 4389 T->startDefinition(); 4390 4391 QualType FieldTypes[] = { 4392 UnsignedLongTy, 4393 UnsignedLongTy, 4394 }; 4395 4396 const char *FieldNames[] = { 4397 "reserved", 4398 "Size" 4399 }; 4400 4401 for (size_t i = 0; i < 2; ++i) { 4402 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 4403 SourceLocation(), 4404 &Idents.get(FieldNames[i]), 4405 FieldTypes[i], /*TInfo=*/0, 4406 /*BitWidth=*/0, 4407 /*Mutable=*/false, 4408 ICIS_NoInit); 4409 Field->setAccess(AS_public); 4410 T->addDecl(Field); 4411 } 4412 4413 T->completeDefinition(); 4414 4415 BlockDescriptorType = T; 4416 4417 return getTagDeclType(BlockDescriptorType); 4418} 4419 4420QualType ASTContext::getBlockDescriptorExtendedType() const { 4421 if (BlockDescriptorExtendedType) 4422 return getTagDeclType(BlockDescriptorExtendedType); 4423 4424 RecordDecl *T; 4425 // FIXME: Needs the FlagAppleBlock bit. 4426 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 4427 &Idents.get("__block_descriptor_withcopydispose")); 4428 T->startDefinition(); 4429 4430 QualType FieldTypes[] = { 4431 UnsignedLongTy, 4432 UnsignedLongTy, 4433 getPointerType(VoidPtrTy), 4434 getPointerType(VoidPtrTy) 4435 }; 4436 4437 const char *FieldNames[] = { 4438 "reserved", 4439 "Size", 4440 "CopyFuncPtr", 4441 "DestroyFuncPtr" 4442 }; 4443 4444 for (size_t i = 0; i < 4; ++i) { 4445 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 4446 SourceLocation(), 4447 &Idents.get(FieldNames[i]), 4448 FieldTypes[i], /*TInfo=*/0, 4449 /*BitWidth=*/0, 4450 /*Mutable=*/false, 4451 ICIS_NoInit); 4452 Field->setAccess(AS_public); 4453 T->addDecl(Field); 4454 } 4455 4456 T->completeDefinition(); 4457 4458 BlockDescriptorExtendedType = T; 4459 4460 return getTagDeclType(BlockDescriptorExtendedType); 4461} 4462 4463/// BlockRequiresCopying - Returns true if byref variable "D" of type "Ty" 4464/// requires copy/dispose. Note that this must match the logic 4465/// in buildByrefHelpers. 4466bool ASTContext::BlockRequiresCopying(QualType Ty, 4467 const VarDecl *D) { 4468 if (const CXXRecordDecl *record = Ty->getAsCXXRecordDecl()) { 4469 const Expr *copyExpr = getBlockVarCopyInits(D); 4470 if (!copyExpr && record->hasTrivialDestructor()) return false; 4471 4472 return true; 4473 } 4474 4475 if (!Ty->isObjCRetainableType()) return false; 4476 4477 Qualifiers qs = Ty.getQualifiers(); 4478 4479 // If we have lifetime, that dominates. 4480 if (Qualifiers::ObjCLifetime lifetime = qs.getObjCLifetime()) { 4481 assert(getLangOpts().ObjCAutoRefCount); 4482 4483 switch (lifetime) { 4484 case Qualifiers::OCL_None: llvm_unreachable("impossible"); 4485 4486 // These are just bits as far as the runtime is concerned. 4487 case Qualifiers::OCL_ExplicitNone: 4488 case Qualifiers::OCL_Autoreleasing: 4489 return false; 4490 4491 // Tell the runtime that this is ARC __weak, called by the 4492 // byref routines. 4493 case Qualifiers::OCL_Weak: 4494 // ARC __strong __block variables need to be retained. 4495 case Qualifiers::OCL_Strong: 4496 return true; 4497 } 4498 llvm_unreachable("fell out of lifetime switch!"); 4499 } 4500 return (Ty->isBlockPointerType() || isObjCNSObjectType(Ty) || 4501 Ty->isObjCObjectPointerType()); 4502} 4503 4504bool ASTContext::getByrefLifetime(QualType Ty, 4505 Qualifiers::ObjCLifetime &LifeTime, 4506 bool &HasByrefExtendedLayout) const { 4507 4508 if (!getLangOpts().ObjC1 || 4509 getLangOpts().getGC() != LangOptions::NonGC) 4510 return false; 4511 4512 HasByrefExtendedLayout = false; 4513 if (Ty->isRecordType()) { 4514 HasByrefExtendedLayout = true; 4515 LifeTime = Qualifiers::OCL_None; 4516 } 4517 else if (getLangOpts().ObjCAutoRefCount) 4518 LifeTime = Ty.getObjCLifetime(); 4519 // MRR. 4520 else if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4521 LifeTime = Qualifiers::OCL_ExplicitNone; 4522 else 4523 LifeTime = Qualifiers::OCL_None; 4524 return true; 4525} 4526 4527TypedefDecl *ASTContext::getObjCInstanceTypeDecl() { 4528 if (!ObjCInstanceTypeDecl) 4529 ObjCInstanceTypeDecl = TypedefDecl::Create(*this, 4530 getTranslationUnitDecl(), 4531 SourceLocation(), 4532 SourceLocation(), 4533 &Idents.get("instancetype"), 4534 getTrivialTypeSourceInfo(getObjCIdType())); 4535 return ObjCInstanceTypeDecl; 4536} 4537 4538// This returns true if a type has been typedefed to BOOL: 4539// typedef <type> BOOL; 4540static bool isTypeTypedefedAsBOOL(QualType T) { 4541 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 4542 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 4543 return II->isStr("BOOL"); 4544 4545 return false; 4546} 4547 4548/// getObjCEncodingTypeSize returns size of type for objective-c encoding 4549/// purpose. 4550CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 4551 if (!type->isIncompleteArrayType() && type->isIncompleteType()) 4552 return CharUnits::Zero(); 4553 4554 CharUnits sz = getTypeSizeInChars(type); 4555 4556 // Make all integer and enum types at least as large as an int 4557 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 4558 sz = std::max(sz, getTypeSizeInChars(IntTy)); 4559 // Treat arrays as pointers, since that's how they're passed in. 4560 else if (type->isArrayType()) 4561 sz = getTypeSizeInChars(VoidPtrTy); 4562 return sz; 4563} 4564 4565static inline 4566std::string charUnitsToString(const CharUnits &CU) { 4567 return llvm::itostr(CU.getQuantity()); 4568} 4569 4570/// getObjCEncodingForBlock - Return the encoded type for this block 4571/// declaration. 4572std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 4573 std::string S; 4574 4575 const BlockDecl *Decl = Expr->getBlockDecl(); 4576 QualType BlockTy = 4577 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 4578 // Encode result type. 4579 if (getLangOpts().EncodeExtendedBlockSig) 4580 getObjCEncodingForMethodParameter(Decl::OBJC_TQ_None, 4581 BlockTy->getAs<FunctionType>()->getResultType(), 4582 S, true /*Extended*/); 4583 else 4584 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), 4585 S); 4586 // Compute size of all parameters. 4587 // Start with computing size of a pointer in number of bytes. 4588 // FIXME: There might(should) be a better way of doing this computation! 4589 SourceLocation Loc; 4590 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 4591 CharUnits ParmOffset = PtrSize; 4592 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 4593 E = Decl->param_end(); PI != E; ++PI) { 4594 QualType PType = (*PI)->getType(); 4595 CharUnits sz = getObjCEncodingTypeSize(PType); 4596 if (sz.isZero()) 4597 continue; 4598 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 4599 ParmOffset += sz; 4600 } 4601 // Size of the argument frame 4602 S += charUnitsToString(ParmOffset); 4603 // Block pointer and offset. 4604 S += "@?0"; 4605 4606 // Argument types. 4607 ParmOffset = PtrSize; 4608 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 4609 Decl->param_end(); PI != E; ++PI) { 4610 ParmVarDecl *PVDecl = *PI; 4611 QualType PType = PVDecl->getOriginalType(); 4612 if (const ArrayType *AT = 4613 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4614 // Use array's original type only if it has known number of 4615 // elements. 4616 if (!isa<ConstantArrayType>(AT)) 4617 PType = PVDecl->getType(); 4618 } else if (PType->isFunctionType()) 4619 PType = PVDecl->getType(); 4620 if (getLangOpts().EncodeExtendedBlockSig) 4621 getObjCEncodingForMethodParameter(Decl::OBJC_TQ_None, PType, 4622 S, true /*Extended*/); 4623 else 4624 getObjCEncodingForType(PType, S); 4625 S += charUnitsToString(ParmOffset); 4626 ParmOffset += getObjCEncodingTypeSize(PType); 4627 } 4628 4629 return S; 4630} 4631 4632bool ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 4633 std::string& S) { 4634 // Encode result type. 4635 getObjCEncodingForType(Decl->getResultType(), S); 4636 CharUnits ParmOffset; 4637 // Compute size of all parameters. 4638 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4639 E = Decl->param_end(); PI != E; ++PI) { 4640 QualType PType = (*PI)->getType(); 4641 CharUnits sz = getObjCEncodingTypeSize(PType); 4642 if (sz.isZero()) 4643 continue; 4644 4645 assert (sz.isPositive() && 4646 "getObjCEncodingForFunctionDecl - Incomplete param type"); 4647 ParmOffset += sz; 4648 } 4649 S += charUnitsToString(ParmOffset); 4650 ParmOffset = CharUnits::Zero(); 4651 4652 // Argument types. 4653 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4654 E = Decl->param_end(); PI != E; ++PI) { 4655 ParmVarDecl *PVDecl = *PI; 4656 QualType PType = PVDecl->getOriginalType(); 4657 if (const ArrayType *AT = 4658 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4659 // Use array's original type only if it has known number of 4660 // elements. 4661 if (!isa<ConstantArrayType>(AT)) 4662 PType = PVDecl->getType(); 4663 } else if (PType->isFunctionType()) 4664 PType = PVDecl->getType(); 4665 getObjCEncodingForType(PType, S); 4666 S += charUnitsToString(ParmOffset); 4667 ParmOffset += getObjCEncodingTypeSize(PType); 4668 } 4669 4670 return false; 4671} 4672 4673/// getObjCEncodingForMethodParameter - Return the encoded type for a single 4674/// method parameter or return type. If Extended, include class names and 4675/// block object types. 4676void ASTContext::getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 4677 QualType T, std::string& S, 4678 bool Extended) const { 4679 // Encode type qualifer, 'in', 'inout', etc. for the parameter. 4680 getObjCEncodingForTypeQualifier(QT, S); 4681 // Encode parameter type. 4682 getObjCEncodingForTypeImpl(T, S, true, true, 0, 4683 true /*OutermostType*/, 4684 false /*EncodingProperty*/, 4685 false /*StructField*/, 4686 Extended /*EncodeBlockParameters*/, 4687 Extended /*EncodeClassNames*/); 4688} 4689 4690/// getObjCEncodingForMethodDecl - Return the encoded type for this method 4691/// declaration. 4692bool ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 4693 std::string& S, 4694 bool Extended) const { 4695 // FIXME: This is not very efficient. 4696 // Encode return type. 4697 getObjCEncodingForMethodParameter(Decl->getObjCDeclQualifier(), 4698 Decl->getResultType(), S, Extended); 4699 // Compute size of all parameters. 4700 // Start with computing size of a pointer in number of bytes. 4701 // FIXME: There might(should) be a better way of doing this computation! 4702 SourceLocation Loc; 4703 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 4704 // The first two arguments (self and _cmd) are pointers; account for 4705 // their size. 4706 CharUnits ParmOffset = 2 * PtrSize; 4707 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4708 E = Decl->sel_param_end(); PI != E; ++PI) { 4709 QualType PType = (*PI)->getType(); 4710 CharUnits sz = getObjCEncodingTypeSize(PType); 4711 if (sz.isZero()) 4712 continue; 4713 4714 assert (sz.isPositive() && 4715 "getObjCEncodingForMethodDecl - Incomplete param type"); 4716 ParmOffset += sz; 4717 } 4718 S += charUnitsToString(ParmOffset); 4719 S += "@0:"; 4720 S += charUnitsToString(PtrSize); 4721 4722 // Argument types. 4723 ParmOffset = 2 * PtrSize; 4724 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4725 E = Decl->sel_param_end(); PI != E; ++PI) { 4726 const ParmVarDecl *PVDecl = *PI; 4727 QualType PType = PVDecl->getOriginalType(); 4728 if (const ArrayType *AT = 4729 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4730 // Use array's original type only if it has known number of 4731 // elements. 4732 if (!isa<ConstantArrayType>(AT)) 4733 PType = PVDecl->getType(); 4734 } else if (PType->isFunctionType()) 4735 PType = PVDecl->getType(); 4736 getObjCEncodingForMethodParameter(PVDecl->getObjCDeclQualifier(), 4737 PType, S, Extended); 4738 S += charUnitsToString(ParmOffset); 4739 ParmOffset += getObjCEncodingTypeSize(PType); 4740 } 4741 4742 return false; 4743} 4744 4745/// getObjCEncodingForPropertyDecl - Return the encoded type for this 4746/// property declaration. If non-NULL, Container must be either an 4747/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 4748/// NULL when getting encodings for protocol properties. 4749/// Property attributes are stored as a comma-delimited C string. The simple 4750/// attributes readonly and bycopy are encoded as single characters. The 4751/// parametrized attributes, getter=name, setter=name, and ivar=name, are 4752/// encoded as single characters, followed by an identifier. Property types 4753/// are also encoded as a parametrized attribute. The characters used to encode 4754/// these attributes are defined by the following enumeration: 4755/// @code 4756/// enum PropertyAttributes { 4757/// kPropertyReadOnly = 'R', // property is read-only. 4758/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 4759/// kPropertyByref = '&', // property is a reference to the value last assigned 4760/// kPropertyDynamic = 'D', // property is dynamic 4761/// kPropertyGetter = 'G', // followed by getter selector name 4762/// kPropertySetter = 'S', // followed by setter selector name 4763/// kPropertyInstanceVariable = 'V' // followed by instance variable name 4764/// kPropertyType = 'T' // followed by old-style type encoding. 4765/// kPropertyWeak = 'W' // 'weak' property 4766/// kPropertyStrong = 'P' // property GC'able 4767/// kPropertyNonAtomic = 'N' // property non-atomic 4768/// }; 4769/// @endcode 4770void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 4771 const Decl *Container, 4772 std::string& S) const { 4773 // Collect information from the property implementation decl(s). 4774 bool Dynamic = false; 4775 ObjCPropertyImplDecl *SynthesizePID = 0; 4776 4777 // FIXME: Duplicated code due to poor abstraction. 4778 if (Container) { 4779 if (const ObjCCategoryImplDecl *CID = 4780 dyn_cast<ObjCCategoryImplDecl>(Container)) { 4781 for (ObjCCategoryImplDecl::propimpl_iterator 4782 i = CID->propimpl_begin(), e = CID->propimpl_end(); 4783 i != e; ++i) { 4784 ObjCPropertyImplDecl *PID = *i; 4785 if (PID->getPropertyDecl() == PD) { 4786 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4787 Dynamic = true; 4788 } else { 4789 SynthesizePID = PID; 4790 } 4791 } 4792 } 4793 } else { 4794 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 4795 for (ObjCCategoryImplDecl::propimpl_iterator 4796 i = OID->propimpl_begin(), e = OID->propimpl_end(); 4797 i != e; ++i) { 4798 ObjCPropertyImplDecl *PID = *i; 4799 if (PID->getPropertyDecl() == PD) { 4800 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4801 Dynamic = true; 4802 } else { 4803 SynthesizePID = PID; 4804 } 4805 } 4806 } 4807 } 4808 } 4809 4810 // FIXME: This is not very efficient. 4811 S = "T"; 4812 4813 // Encode result type. 4814 // GCC has some special rules regarding encoding of properties which 4815 // closely resembles encoding of ivars. 4816 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 4817 true /* outermost type */, 4818 true /* encoding for property */); 4819 4820 if (PD->isReadOnly()) { 4821 S += ",R"; 4822 } else { 4823 switch (PD->getSetterKind()) { 4824 case ObjCPropertyDecl::Assign: break; 4825 case ObjCPropertyDecl::Copy: S += ",C"; break; 4826 case ObjCPropertyDecl::Retain: S += ",&"; break; 4827 case ObjCPropertyDecl::Weak: S += ",W"; break; 4828 } 4829 } 4830 4831 // It really isn't clear at all what this means, since properties 4832 // are "dynamic by default". 4833 if (Dynamic) 4834 S += ",D"; 4835 4836 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 4837 S += ",N"; 4838 4839 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 4840 S += ",G"; 4841 S += PD->getGetterName().getAsString(); 4842 } 4843 4844 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 4845 S += ",S"; 4846 S += PD->getSetterName().getAsString(); 4847 } 4848 4849 if (SynthesizePID) { 4850 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 4851 S += ",V"; 4852 S += OID->getNameAsString(); 4853 } 4854 4855 // FIXME: OBJCGC: weak & strong 4856} 4857 4858/// getLegacyIntegralTypeEncoding - 4859/// Another legacy compatibility encoding: 32-bit longs are encoded as 4860/// 'l' or 'L' , but not always. For typedefs, we need to use 4861/// 'i' or 'I' instead if encoding a struct field, or a pointer! 4862/// 4863void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 4864 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 4865 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 4866 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 4867 PointeeTy = UnsignedIntTy; 4868 else 4869 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 4870 PointeeTy = IntTy; 4871 } 4872 } 4873} 4874 4875void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 4876 const FieldDecl *Field) const { 4877 // We follow the behavior of gcc, expanding structures which are 4878 // directly pointed to, and expanding embedded structures. Note that 4879 // these rules are sufficient to prevent recursive encoding of the 4880 // same type. 4881 getObjCEncodingForTypeImpl(T, S, true, true, Field, 4882 true /* outermost type */); 4883} 4884 4885static char getObjCEncodingForPrimitiveKind(const ASTContext *C, 4886 BuiltinType::Kind kind) { 4887 switch (kind) { 4888 case BuiltinType::Void: return 'v'; 4889 case BuiltinType::Bool: return 'B'; 4890 case BuiltinType::Char_U: 4891 case BuiltinType::UChar: return 'C'; 4892 case BuiltinType::Char16: 4893 case BuiltinType::UShort: return 'S'; 4894 case BuiltinType::Char32: 4895 case BuiltinType::UInt: return 'I'; 4896 case BuiltinType::ULong: 4897 return C->getTargetInfo().getLongWidth() == 32 ? 'L' : 'Q'; 4898 case BuiltinType::UInt128: return 'T'; 4899 case BuiltinType::ULongLong: return 'Q'; 4900 case BuiltinType::Char_S: 4901 case BuiltinType::SChar: return 'c'; 4902 case BuiltinType::Short: return 's'; 4903 case BuiltinType::WChar_S: 4904 case BuiltinType::WChar_U: 4905 case BuiltinType::Int: return 'i'; 4906 case BuiltinType::Long: 4907 return C->getTargetInfo().getLongWidth() == 32 ? 'l' : 'q'; 4908 case BuiltinType::LongLong: return 'q'; 4909 case BuiltinType::Int128: return 't'; 4910 case BuiltinType::Float: return 'f'; 4911 case BuiltinType::Double: return 'd'; 4912 case BuiltinType::LongDouble: return 'D'; 4913 case BuiltinType::NullPtr: return '*'; // like char* 4914 4915 case BuiltinType::Half: 4916 // FIXME: potentially need @encodes for these! 4917 return ' '; 4918 4919 case BuiltinType::ObjCId: 4920 case BuiltinType::ObjCClass: 4921 case BuiltinType::ObjCSel: 4922 llvm_unreachable("@encoding ObjC primitive type"); 4923 4924 // OpenCL and placeholder types don't need @encodings. 4925 case BuiltinType::OCLImage1d: 4926 case BuiltinType::OCLImage1dArray: 4927 case BuiltinType::OCLImage1dBuffer: 4928 case BuiltinType::OCLImage2d: 4929 case BuiltinType::OCLImage2dArray: 4930 case BuiltinType::OCLImage3d: 4931 case BuiltinType::OCLEvent: 4932 case BuiltinType::OCLSampler: 4933 case BuiltinType::Dependent: 4934#define BUILTIN_TYPE(KIND, ID) 4935#define PLACEHOLDER_TYPE(KIND, ID) \ 4936 case BuiltinType::KIND: 4937#include "clang/AST/BuiltinTypes.def" 4938 llvm_unreachable("invalid builtin type for @encode"); 4939 } 4940 llvm_unreachable("invalid BuiltinType::Kind value"); 4941} 4942 4943static char ObjCEncodingForEnumType(const ASTContext *C, const EnumType *ET) { 4944 EnumDecl *Enum = ET->getDecl(); 4945 4946 // The encoding of an non-fixed enum type is always 'i', regardless of size. 4947 if (!Enum->isFixed()) 4948 return 'i'; 4949 4950 // The encoding of a fixed enum type matches its fixed underlying type. 4951 const BuiltinType *BT = Enum->getIntegerType()->castAs<BuiltinType>(); 4952 return getObjCEncodingForPrimitiveKind(C, BT->getKind()); 4953} 4954 4955static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4956 QualType T, const FieldDecl *FD) { 4957 assert(FD->isBitField() && "not a bitfield - getObjCEncodingForTypeImpl"); 4958 S += 'b'; 4959 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4960 // The GNU runtime requires more information; bitfields are encoded as b, 4961 // then the offset (in bits) of the first element, then the type of the 4962 // bitfield, then the size in bits. For example, in this structure: 4963 // 4964 // struct 4965 // { 4966 // int integer; 4967 // int flags:2; 4968 // }; 4969 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4970 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4971 // information is not especially sensible, but we're stuck with it for 4972 // compatibility with GCC, although providing it breaks anything that 4973 // actually uses runtime introspection and wants to work on both runtimes... 4974 if (Ctx->getLangOpts().ObjCRuntime.isGNUFamily()) { 4975 const RecordDecl *RD = FD->getParent(); 4976 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4977 S += llvm::utostr(RL.getFieldOffset(FD->getFieldIndex())); 4978 if (const EnumType *ET = T->getAs<EnumType>()) 4979 S += ObjCEncodingForEnumType(Ctx, ET); 4980 else { 4981 const BuiltinType *BT = T->castAs<BuiltinType>(); 4982 S += getObjCEncodingForPrimitiveKind(Ctx, BT->getKind()); 4983 } 4984 } 4985 S += llvm::utostr(FD->getBitWidthValue(*Ctx)); 4986} 4987 4988// FIXME: Use SmallString for accumulating string. 4989void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4990 bool ExpandPointedToStructures, 4991 bool ExpandStructures, 4992 const FieldDecl *FD, 4993 bool OutermostType, 4994 bool EncodingProperty, 4995 bool StructField, 4996 bool EncodeBlockParameters, 4997 bool EncodeClassNames, 4998 bool EncodePointerToObjCTypedef) const { 4999 CanQualType CT = getCanonicalType(T); 5000 switch (CT->getTypeClass()) { 5001 case Type::Builtin: 5002 case Type::Enum: 5003 if (FD && FD->isBitField()) 5004 return EncodeBitField(this, S, T, FD); 5005 if (const BuiltinType *BT = dyn_cast<BuiltinType>(CT)) 5006 S += getObjCEncodingForPrimitiveKind(this, BT->getKind()); 5007 else 5008 S += ObjCEncodingForEnumType(this, cast<EnumType>(CT)); 5009 return; 5010 5011 case Type::Complex: { 5012 const ComplexType *CT = T->castAs<ComplexType>(); 5013 S += 'j'; 5014 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 5015 false); 5016 return; 5017 } 5018 5019 case Type::Atomic: { 5020 const AtomicType *AT = T->castAs<AtomicType>(); 5021 S += 'A'; 5022 getObjCEncodingForTypeImpl(AT->getValueType(), S, false, false, 0, 5023 false, false); 5024 return; 5025 } 5026 5027 // encoding for pointer or reference types. 5028 case Type::Pointer: 5029 case Type::LValueReference: 5030 case Type::RValueReference: { 5031 QualType PointeeTy; 5032 if (isa<PointerType>(CT)) { 5033 const PointerType *PT = T->castAs<PointerType>(); 5034 if (PT->isObjCSelType()) { 5035 S += ':'; 5036 return; 5037 } 5038 PointeeTy = PT->getPointeeType(); 5039 } else { 5040 PointeeTy = T->castAs<ReferenceType>()->getPointeeType(); 5041 } 5042 5043 bool isReadOnly = false; 5044 // For historical/compatibility reasons, the read-only qualifier of the 5045 // pointee gets emitted _before_ the '^'. The read-only qualifier of 5046 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 5047 // Also, do not emit the 'r' for anything but the outermost type! 5048 if (isa<TypedefType>(T.getTypePtr())) { 5049 if (OutermostType && T.isConstQualified()) { 5050 isReadOnly = true; 5051 S += 'r'; 5052 } 5053 } else if (OutermostType) { 5054 QualType P = PointeeTy; 5055 while (P->getAs<PointerType>()) 5056 P = P->getAs<PointerType>()->getPointeeType(); 5057 if (P.isConstQualified()) { 5058 isReadOnly = true; 5059 S += 'r'; 5060 } 5061 } 5062 if (isReadOnly) { 5063 // Another legacy compatibility encoding. Some ObjC qualifier and type 5064 // combinations need to be rearranged. 5065 // Rewrite "in const" from "nr" to "rn" 5066 if (StringRef(S).endswith("nr")) 5067 S.replace(S.end()-2, S.end(), "rn"); 5068 } 5069 5070 if (PointeeTy->isCharType()) { 5071 // char pointer types should be encoded as '*' unless it is a 5072 // type that has been typedef'd to 'BOOL'. 5073 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 5074 S += '*'; 5075 return; 5076 } 5077 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 5078 // GCC binary compat: Need to convert "struct objc_class *" to "#". 5079 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 5080 S += '#'; 5081 return; 5082 } 5083 // GCC binary compat: Need to convert "struct objc_object *" to "@". 5084 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 5085 S += '@'; 5086 return; 5087 } 5088 // fall through... 5089 } 5090 S += '^'; 5091 getLegacyIntegralTypeEncoding(PointeeTy); 5092 5093 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 5094 NULL); 5095 return; 5096 } 5097 5098 case Type::ConstantArray: 5099 case Type::IncompleteArray: 5100 case Type::VariableArray: { 5101 const ArrayType *AT = cast<ArrayType>(CT); 5102 5103 if (isa<IncompleteArrayType>(AT) && !StructField) { 5104 // Incomplete arrays are encoded as a pointer to the array element. 5105 S += '^'; 5106 5107 getObjCEncodingForTypeImpl(AT->getElementType(), S, 5108 false, ExpandStructures, FD); 5109 } else { 5110 S += '['; 5111 5112 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 5113 if (getTypeSize(CAT->getElementType()) == 0) 5114 S += '0'; 5115 else 5116 S += llvm::utostr(CAT->getSize().getZExtValue()); 5117 } else { 5118 //Variable length arrays are encoded as a regular array with 0 elements. 5119 assert((isa<VariableArrayType>(AT) || isa<IncompleteArrayType>(AT)) && 5120 "Unknown array type!"); 5121 S += '0'; 5122 } 5123 5124 getObjCEncodingForTypeImpl(AT->getElementType(), S, 5125 false, ExpandStructures, FD); 5126 S += ']'; 5127 } 5128 return; 5129 } 5130 5131 case Type::FunctionNoProto: 5132 case Type::FunctionProto: 5133 S += '?'; 5134 return; 5135 5136 case Type::Record: { 5137 RecordDecl *RDecl = cast<RecordType>(CT)->getDecl(); 5138 S += RDecl->isUnion() ? '(' : '{'; 5139 // Anonymous structures print as '?' 5140 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 5141 S += II->getName(); 5142 if (ClassTemplateSpecializationDecl *Spec 5143 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 5144 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 5145 std::string TemplateArgsStr 5146 = TemplateSpecializationType::PrintTemplateArgumentList( 5147 TemplateArgs.data(), 5148 TemplateArgs.size(), 5149 (*this).getPrintingPolicy()); 5150 5151 S += TemplateArgsStr; 5152 } 5153 } else { 5154 S += '?'; 5155 } 5156 if (ExpandStructures) { 5157 S += '='; 5158 if (!RDecl->isUnion()) { 5159 getObjCEncodingForStructureImpl(RDecl, S, FD); 5160 } else { 5161 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 5162 FieldEnd = RDecl->field_end(); 5163 Field != FieldEnd; ++Field) { 5164 if (FD) { 5165 S += '"'; 5166 S += Field->getNameAsString(); 5167 S += '"'; 5168 } 5169 5170 // Special case bit-fields. 5171 if (Field->isBitField()) { 5172 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 5173 *Field); 5174 } else { 5175 QualType qt = Field->getType(); 5176 getLegacyIntegralTypeEncoding(qt); 5177 getObjCEncodingForTypeImpl(qt, S, false, true, 5178 FD, /*OutermostType*/false, 5179 /*EncodingProperty*/false, 5180 /*StructField*/true); 5181 } 5182 } 5183 } 5184 } 5185 S += RDecl->isUnion() ? ')' : '}'; 5186 return; 5187 } 5188 5189 case Type::BlockPointer: { 5190 const BlockPointerType *BT = T->castAs<BlockPointerType>(); 5191 S += "@?"; // Unlike a pointer-to-function, which is "^?". 5192 if (EncodeBlockParameters) { 5193 const FunctionType *FT = BT->getPointeeType()->castAs<FunctionType>(); 5194 5195 S += '<'; 5196 // Block return type 5197 getObjCEncodingForTypeImpl(FT->getResultType(), S, 5198 ExpandPointedToStructures, ExpandStructures, 5199 FD, 5200 false /* OutermostType */, 5201 EncodingProperty, 5202 false /* StructField */, 5203 EncodeBlockParameters, 5204 EncodeClassNames); 5205 // Block self 5206 S += "@?"; 5207 // Block parameters 5208 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) { 5209 for (FunctionProtoType::arg_type_iterator I = FPT->arg_type_begin(), 5210 E = FPT->arg_type_end(); I && (I != E); ++I) { 5211 getObjCEncodingForTypeImpl(*I, S, 5212 ExpandPointedToStructures, 5213 ExpandStructures, 5214 FD, 5215 false /* OutermostType */, 5216 EncodingProperty, 5217 false /* StructField */, 5218 EncodeBlockParameters, 5219 EncodeClassNames); 5220 } 5221 } 5222 S += '>'; 5223 } 5224 return; 5225 } 5226 5227 case Type::ObjCObject: 5228 case Type::ObjCInterface: { 5229 // Ignore protocol qualifiers when mangling at this level. 5230 T = T->castAs<ObjCObjectType>()->getBaseType(); 5231 5232 // The assumption seems to be that this assert will succeed 5233 // because nested levels will have filtered out 'id' and 'Class'. 5234 const ObjCInterfaceType *OIT = T->castAs<ObjCInterfaceType>(); 5235 // @encode(class_name) 5236 ObjCInterfaceDecl *OI = OIT->getDecl(); 5237 S += '{'; 5238 const IdentifierInfo *II = OI->getIdentifier(); 5239 S += II->getName(); 5240 S += '='; 5241 SmallVector<const ObjCIvarDecl*, 32> Ivars; 5242 DeepCollectObjCIvars(OI, true, Ivars); 5243 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 5244 const FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 5245 if (Field->isBitField()) 5246 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 5247 else 5248 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD, 5249 false, false, false, false, false, 5250 EncodePointerToObjCTypedef); 5251 } 5252 S += '}'; 5253 return; 5254 } 5255 5256 case Type::ObjCObjectPointer: { 5257 const ObjCObjectPointerType *OPT = T->castAs<ObjCObjectPointerType>(); 5258 if (OPT->isObjCIdType()) { 5259 S += '@'; 5260 return; 5261 } 5262 5263 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 5264 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 5265 // Since this is a binary compatibility issue, need to consult with runtime 5266 // folks. Fortunately, this is a *very* obsure construct. 5267 S += '#'; 5268 return; 5269 } 5270 5271 if (OPT->isObjCQualifiedIdType()) { 5272 getObjCEncodingForTypeImpl(getObjCIdType(), S, 5273 ExpandPointedToStructures, 5274 ExpandStructures, FD); 5275 if (FD || EncodingProperty || EncodeClassNames) { 5276 // Note that we do extended encoding of protocol qualifer list 5277 // Only when doing ivar or property encoding. 5278 S += '"'; 5279 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 5280 E = OPT->qual_end(); I != E; ++I) { 5281 S += '<'; 5282 S += (*I)->getNameAsString(); 5283 S += '>'; 5284 } 5285 S += '"'; 5286 } 5287 return; 5288 } 5289 5290 QualType PointeeTy = OPT->getPointeeType(); 5291 if (!EncodingProperty && 5292 isa<TypedefType>(PointeeTy.getTypePtr()) && 5293 !EncodePointerToObjCTypedef) { 5294 // Another historical/compatibility reason. 5295 // We encode the underlying type which comes out as 5296 // {...}; 5297 S += '^'; 5298 getObjCEncodingForTypeImpl(PointeeTy, S, 5299 false, ExpandPointedToStructures, 5300 NULL, 5301 false, false, false, false, false, 5302 /*EncodePointerToObjCTypedef*/true); 5303 return; 5304 } 5305 5306 S += '@'; 5307 if (OPT->getInterfaceDecl() && 5308 (FD || EncodingProperty || EncodeClassNames)) { 5309 S += '"'; 5310 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 5311 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 5312 E = OPT->qual_end(); I != E; ++I) { 5313 S += '<'; 5314 S += (*I)->getNameAsString(); 5315 S += '>'; 5316 } 5317 S += '"'; 5318 } 5319 return; 5320 } 5321 5322 // gcc just blithely ignores member pointers. 5323 // FIXME: we shoul do better than that. 'M' is available. 5324 case Type::MemberPointer: 5325 return; 5326 5327 case Type::Vector: 5328 case Type::ExtVector: 5329 // This matches gcc's encoding, even though technically it is 5330 // insufficient. 5331 // FIXME. We should do a better job than gcc. 5332 return; 5333 5334#define ABSTRACT_TYPE(KIND, BASE) 5335#define TYPE(KIND, BASE) 5336#define DEPENDENT_TYPE(KIND, BASE) \ 5337 case Type::KIND: 5338#define NON_CANONICAL_TYPE(KIND, BASE) \ 5339 case Type::KIND: 5340#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(KIND, BASE) \ 5341 case Type::KIND: 5342#include "clang/AST/TypeNodes.def" 5343 llvm_unreachable("@encode for dependent type!"); 5344 } 5345 llvm_unreachable("bad type kind!"); 5346} 5347 5348void ASTContext::getObjCEncodingForStructureImpl(RecordDecl *RDecl, 5349 std::string &S, 5350 const FieldDecl *FD, 5351 bool includeVBases) const { 5352 assert(RDecl && "Expected non-null RecordDecl"); 5353 assert(!RDecl->isUnion() && "Should not be called for unions"); 5354 if (!RDecl->getDefinition()) 5355 return; 5356 5357 CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(RDecl); 5358 std::multimap<uint64_t, NamedDecl *> FieldOrBaseOffsets; 5359 const ASTRecordLayout &layout = getASTRecordLayout(RDecl); 5360 5361 if (CXXRec) { 5362 for (CXXRecordDecl::base_class_iterator 5363 BI = CXXRec->bases_begin(), 5364 BE = CXXRec->bases_end(); BI != BE; ++BI) { 5365 if (!BI->isVirtual()) { 5366 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 5367 if (base->isEmpty()) 5368 continue; 5369 uint64_t offs = toBits(layout.getBaseClassOffset(base)); 5370 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 5371 std::make_pair(offs, base)); 5372 } 5373 } 5374 } 5375 5376 unsigned i = 0; 5377 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 5378 FieldEnd = RDecl->field_end(); 5379 Field != FieldEnd; ++Field, ++i) { 5380 uint64_t offs = layout.getFieldOffset(i); 5381 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 5382 std::make_pair(offs, *Field)); 5383 } 5384 5385 if (CXXRec && includeVBases) { 5386 for (CXXRecordDecl::base_class_iterator 5387 BI = CXXRec->vbases_begin(), 5388 BE = CXXRec->vbases_end(); BI != BE; ++BI) { 5389 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 5390 if (base->isEmpty()) 5391 continue; 5392 uint64_t offs = toBits(layout.getVBaseClassOffset(base)); 5393 if (FieldOrBaseOffsets.find(offs) == FieldOrBaseOffsets.end()) 5394 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.end(), 5395 std::make_pair(offs, base)); 5396 } 5397 } 5398 5399 CharUnits size; 5400 if (CXXRec) { 5401 size = includeVBases ? layout.getSize() : layout.getNonVirtualSize(); 5402 } else { 5403 size = layout.getSize(); 5404 } 5405 5406 uint64_t CurOffs = 0; 5407 std::multimap<uint64_t, NamedDecl *>::iterator 5408 CurLayObj = FieldOrBaseOffsets.begin(); 5409 5410 if (CXXRec && CXXRec->isDynamicClass() && 5411 (CurLayObj == FieldOrBaseOffsets.end() || CurLayObj->first != 0)) { 5412 if (FD) { 5413 S += "\"_vptr$"; 5414 std::string recname = CXXRec->getNameAsString(); 5415 if (recname.empty()) recname = "?"; 5416 S += recname; 5417 S += '"'; 5418 } 5419 S += "^^?"; 5420 CurOffs += getTypeSize(VoidPtrTy); 5421 } 5422 5423 if (!RDecl->hasFlexibleArrayMember()) { 5424 // Mark the end of the structure. 5425 uint64_t offs = toBits(size); 5426 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 5427 std::make_pair(offs, (NamedDecl*)0)); 5428 } 5429 5430 for (; CurLayObj != FieldOrBaseOffsets.end(); ++CurLayObj) { 5431 assert(CurOffs <= CurLayObj->first); 5432 5433 if (CurOffs < CurLayObj->first) { 5434 uint64_t padding = CurLayObj->first - CurOffs; 5435 // FIXME: There doesn't seem to be a way to indicate in the encoding that 5436 // packing/alignment of members is different that normal, in which case 5437 // the encoding will be out-of-sync with the real layout. 5438 // If the runtime switches to just consider the size of types without 5439 // taking into account alignment, we could make padding explicit in the 5440 // encoding (e.g. using arrays of chars). The encoding strings would be 5441 // longer then though. 5442 CurOffs += padding; 5443 } 5444 5445 NamedDecl *dcl = CurLayObj->second; 5446 if (dcl == 0) 5447 break; // reached end of structure. 5448 5449 if (CXXRecordDecl *base = dyn_cast<CXXRecordDecl>(dcl)) { 5450 // We expand the bases without their virtual bases since those are going 5451 // in the initial structure. Note that this differs from gcc which 5452 // expands virtual bases each time one is encountered in the hierarchy, 5453 // making the encoding type bigger than it really is. 5454 getObjCEncodingForStructureImpl(base, S, FD, /*includeVBases*/false); 5455 assert(!base->isEmpty()); 5456 CurOffs += toBits(getASTRecordLayout(base).getNonVirtualSize()); 5457 } else { 5458 FieldDecl *field = cast<FieldDecl>(dcl); 5459 if (FD) { 5460 S += '"'; 5461 S += field->getNameAsString(); 5462 S += '"'; 5463 } 5464 5465 if (field->isBitField()) { 5466 EncodeBitField(this, S, field->getType(), field); 5467 CurOffs += field->getBitWidthValue(*this); 5468 } else { 5469 QualType qt = field->getType(); 5470 getLegacyIntegralTypeEncoding(qt); 5471 getObjCEncodingForTypeImpl(qt, S, false, true, FD, 5472 /*OutermostType*/false, 5473 /*EncodingProperty*/false, 5474 /*StructField*/true); 5475 CurOffs += getTypeSize(field->getType()); 5476 } 5477 } 5478 } 5479} 5480 5481void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 5482 std::string& S) const { 5483 if (QT & Decl::OBJC_TQ_In) 5484 S += 'n'; 5485 if (QT & Decl::OBJC_TQ_Inout) 5486 S += 'N'; 5487 if (QT & Decl::OBJC_TQ_Out) 5488 S += 'o'; 5489 if (QT & Decl::OBJC_TQ_Bycopy) 5490 S += 'O'; 5491 if (QT & Decl::OBJC_TQ_Byref) 5492 S += 'R'; 5493 if (QT & Decl::OBJC_TQ_Oneway) 5494 S += 'V'; 5495} 5496 5497TypedefDecl *ASTContext::getObjCIdDecl() const { 5498 if (!ObjCIdDecl) { 5499 QualType T = getObjCObjectType(ObjCBuiltinIdTy, 0, 0); 5500 T = getObjCObjectPointerType(T); 5501 TypeSourceInfo *IdInfo = getTrivialTypeSourceInfo(T); 5502 ObjCIdDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 5503 getTranslationUnitDecl(), 5504 SourceLocation(), SourceLocation(), 5505 &Idents.get("id"), IdInfo); 5506 } 5507 5508 return ObjCIdDecl; 5509} 5510 5511TypedefDecl *ASTContext::getObjCSelDecl() const { 5512 if (!ObjCSelDecl) { 5513 QualType SelT = getPointerType(ObjCBuiltinSelTy); 5514 TypeSourceInfo *SelInfo = getTrivialTypeSourceInfo(SelT); 5515 ObjCSelDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 5516 getTranslationUnitDecl(), 5517 SourceLocation(), SourceLocation(), 5518 &Idents.get("SEL"), SelInfo); 5519 } 5520 return ObjCSelDecl; 5521} 5522 5523TypedefDecl *ASTContext::getObjCClassDecl() const { 5524 if (!ObjCClassDecl) { 5525 QualType T = getObjCObjectType(ObjCBuiltinClassTy, 0, 0); 5526 T = getObjCObjectPointerType(T); 5527 TypeSourceInfo *ClassInfo = getTrivialTypeSourceInfo(T); 5528 ObjCClassDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 5529 getTranslationUnitDecl(), 5530 SourceLocation(), SourceLocation(), 5531 &Idents.get("Class"), ClassInfo); 5532 } 5533 5534 return ObjCClassDecl; 5535} 5536 5537ObjCInterfaceDecl *ASTContext::getObjCProtocolDecl() const { 5538 if (!ObjCProtocolClassDecl) { 5539 ObjCProtocolClassDecl 5540 = ObjCInterfaceDecl::Create(*this, getTranslationUnitDecl(), 5541 SourceLocation(), 5542 &Idents.get("Protocol"), 5543 /*PrevDecl=*/0, 5544 SourceLocation(), true); 5545 } 5546 5547 return ObjCProtocolClassDecl; 5548} 5549 5550//===----------------------------------------------------------------------===// 5551// __builtin_va_list Construction Functions 5552//===----------------------------------------------------------------------===// 5553 5554static TypedefDecl *CreateCharPtrBuiltinVaListDecl(const ASTContext *Context) { 5555 // typedef char* __builtin_va_list; 5556 QualType CharPtrType = Context->getPointerType(Context->CharTy); 5557 TypeSourceInfo *TInfo 5558 = Context->getTrivialTypeSourceInfo(CharPtrType); 5559 5560 TypedefDecl *VaListTypeDecl 5561 = TypedefDecl::Create(const_cast<ASTContext &>(*Context), 5562 Context->getTranslationUnitDecl(), 5563 SourceLocation(), SourceLocation(), 5564 &Context->Idents.get("__builtin_va_list"), 5565 TInfo); 5566 return VaListTypeDecl; 5567} 5568 5569static TypedefDecl *CreateVoidPtrBuiltinVaListDecl(const ASTContext *Context) { 5570 // typedef void* __builtin_va_list; 5571 QualType VoidPtrType = Context->getPointerType(Context->VoidTy); 5572 TypeSourceInfo *TInfo 5573 = Context->getTrivialTypeSourceInfo(VoidPtrType); 5574 5575 TypedefDecl *VaListTypeDecl 5576 = TypedefDecl::Create(const_cast<ASTContext &>(*Context), 5577 Context->getTranslationUnitDecl(), 5578 SourceLocation(), SourceLocation(), 5579 &Context->Idents.get("__builtin_va_list"), 5580 TInfo); 5581 return VaListTypeDecl; 5582} 5583 5584static TypedefDecl * 5585CreateAArch64ABIBuiltinVaListDecl(const ASTContext *Context) { 5586 RecordDecl *VaListTagDecl; 5587 if (Context->getLangOpts().CPlusPlus) { 5588 // namespace std { struct __va_list { 5589 NamespaceDecl *NS; 5590 NS = NamespaceDecl::Create(const_cast<ASTContext &>(*Context), 5591 Context->getTranslationUnitDecl(), 5592 /*Inline*/false, SourceLocation(), 5593 SourceLocation(), &Context->Idents.get("std"), 5594 /*PrevDecl*/0); 5595 5596 VaListTagDecl = CXXRecordDecl::Create(*Context, TTK_Struct, 5597 Context->getTranslationUnitDecl(), 5598 SourceLocation(), SourceLocation(), 5599 &Context->Idents.get("__va_list")); 5600 VaListTagDecl->setDeclContext(NS); 5601 } else { 5602 // struct __va_list 5603 VaListTagDecl = CreateRecordDecl(*Context, TTK_Struct, 5604 Context->getTranslationUnitDecl(), 5605 &Context->Idents.get("__va_list")); 5606 } 5607 5608 VaListTagDecl->startDefinition(); 5609 5610 const size_t NumFields = 5; 5611 QualType FieldTypes[NumFields]; 5612 const char *FieldNames[NumFields]; 5613 5614 // void *__stack; 5615 FieldTypes[0] = Context->getPointerType(Context->VoidTy); 5616 FieldNames[0] = "__stack"; 5617 5618 // void *__gr_top; 5619 FieldTypes[1] = Context->getPointerType(Context->VoidTy); 5620 FieldNames[1] = "__gr_top"; 5621 5622 // void *__vr_top; 5623 FieldTypes[2] = Context->getPointerType(Context->VoidTy); 5624 FieldNames[2] = "__vr_top"; 5625 5626 // int __gr_offs; 5627 FieldTypes[3] = Context->IntTy; 5628 FieldNames[3] = "__gr_offs"; 5629 5630 // int __vr_offs; 5631 FieldTypes[4] = Context->IntTy; 5632 FieldNames[4] = "__vr_offs"; 5633 5634 // Create fields 5635 for (unsigned i = 0; i < NumFields; ++i) { 5636 FieldDecl *Field = FieldDecl::Create(const_cast<ASTContext &>(*Context), 5637 VaListTagDecl, 5638 SourceLocation(), 5639 SourceLocation(), 5640 &Context->Idents.get(FieldNames[i]), 5641 FieldTypes[i], /*TInfo=*/0, 5642 /*BitWidth=*/0, 5643 /*Mutable=*/false, 5644 ICIS_NoInit); 5645 Field->setAccess(AS_public); 5646 VaListTagDecl->addDecl(Field); 5647 } 5648 VaListTagDecl->completeDefinition(); 5649 QualType VaListTagType = Context->getRecordType(VaListTagDecl); 5650 Context->VaListTagTy = VaListTagType; 5651 5652 // } __builtin_va_list; 5653 TypedefDecl *VaListTypedefDecl 5654 = TypedefDecl::Create(const_cast<ASTContext &>(*Context), 5655 Context->getTranslationUnitDecl(), 5656 SourceLocation(), SourceLocation(), 5657 &Context->Idents.get("__builtin_va_list"), 5658 Context->getTrivialTypeSourceInfo(VaListTagType)); 5659 5660 return VaListTypedefDecl; 5661} 5662 5663static TypedefDecl *CreatePowerABIBuiltinVaListDecl(const ASTContext *Context) { 5664 // typedef struct __va_list_tag { 5665 RecordDecl *VaListTagDecl; 5666 5667 VaListTagDecl = CreateRecordDecl(*Context, TTK_Struct, 5668 Context->getTranslationUnitDecl(), 5669 &Context->Idents.get("__va_list_tag")); 5670 VaListTagDecl->startDefinition(); 5671 5672 const size_t NumFields = 5; 5673 QualType FieldTypes[NumFields]; 5674 const char *FieldNames[NumFields]; 5675 5676 // unsigned char gpr; 5677 FieldTypes[0] = Context->UnsignedCharTy; 5678 FieldNames[0] = "gpr"; 5679 5680 // unsigned char fpr; 5681 FieldTypes[1] = Context->UnsignedCharTy; 5682 FieldNames[1] = "fpr"; 5683 5684 // unsigned short reserved; 5685 FieldTypes[2] = Context->UnsignedShortTy; 5686 FieldNames[2] = "reserved"; 5687 5688 // void* overflow_arg_area; 5689 FieldTypes[3] = Context->getPointerType(Context->VoidTy); 5690 FieldNames[3] = "overflow_arg_area"; 5691 5692 // void* reg_save_area; 5693 FieldTypes[4] = Context->getPointerType(Context->VoidTy); 5694 FieldNames[4] = "reg_save_area"; 5695 5696 // Create fields 5697 for (unsigned i = 0; i < NumFields; ++i) { 5698 FieldDecl *Field = FieldDecl::Create(*Context, VaListTagDecl, 5699 SourceLocation(), 5700 SourceLocation(), 5701 &Context->Idents.get(FieldNames[i]), 5702 FieldTypes[i], /*TInfo=*/0, 5703 /*BitWidth=*/0, 5704 /*Mutable=*/false, 5705 ICIS_NoInit); 5706 Field->setAccess(AS_public); 5707 VaListTagDecl->addDecl(Field); 5708 } 5709 VaListTagDecl->completeDefinition(); 5710 QualType VaListTagType = Context->getRecordType(VaListTagDecl); 5711 Context->VaListTagTy = VaListTagType; 5712 5713 // } __va_list_tag; 5714 TypedefDecl *VaListTagTypedefDecl 5715 = TypedefDecl::Create(const_cast<ASTContext &>(*Context), 5716 Context->getTranslationUnitDecl(), 5717 SourceLocation(), SourceLocation(), 5718 &Context->Idents.get("__va_list_tag"), 5719 Context->getTrivialTypeSourceInfo(VaListTagType)); 5720 QualType VaListTagTypedefType = 5721 Context->getTypedefType(VaListTagTypedefDecl); 5722 5723 // typedef __va_list_tag __builtin_va_list[1]; 5724 llvm::APInt Size(Context->getTypeSize(Context->getSizeType()), 1); 5725 QualType VaListTagArrayType 5726 = Context->getConstantArrayType(VaListTagTypedefType, 5727 Size, ArrayType::Normal, 0); 5728 TypeSourceInfo *TInfo 5729 = Context->getTrivialTypeSourceInfo(VaListTagArrayType); 5730 TypedefDecl *VaListTypedefDecl 5731 = TypedefDecl::Create(const_cast<ASTContext &>(*Context), 5732 Context->getTranslationUnitDecl(), 5733 SourceLocation(), SourceLocation(), 5734 &Context->Idents.get("__builtin_va_list"), 5735 TInfo); 5736 5737 return VaListTypedefDecl; 5738} 5739 5740static TypedefDecl * 5741CreateX86_64ABIBuiltinVaListDecl(const ASTContext *Context) { 5742 // typedef struct __va_list_tag { 5743 RecordDecl *VaListTagDecl; 5744 VaListTagDecl = CreateRecordDecl(*Context, TTK_Struct, 5745 Context->getTranslationUnitDecl(), 5746 &Context->Idents.get("__va_list_tag")); 5747 VaListTagDecl->startDefinition(); 5748 5749 const size_t NumFields = 4; 5750 QualType FieldTypes[NumFields]; 5751 const char *FieldNames[NumFields]; 5752 5753 // unsigned gp_offset; 5754 FieldTypes[0] = Context->UnsignedIntTy; 5755 FieldNames[0] = "gp_offset"; 5756 5757 // unsigned fp_offset; 5758 FieldTypes[1] = Context->UnsignedIntTy; 5759 FieldNames[1] = "fp_offset"; 5760 5761 // void* overflow_arg_area; 5762 FieldTypes[2] = Context->getPointerType(Context->VoidTy); 5763 FieldNames[2] = "overflow_arg_area"; 5764 5765 // void* reg_save_area; 5766 FieldTypes[3] = Context->getPointerType(Context->VoidTy); 5767 FieldNames[3] = "reg_save_area"; 5768 5769 // Create fields 5770 for (unsigned i = 0; i < NumFields; ++i) { 5771 FieldDecl *Field = FieldDecl::Create(const_cast<ASTContext &>(*Context), 5772 VaListTagDecl, 5773 SourceLocation(), 5774 SourceLocation(), 5775 &Context->Idents.get(FieldNames[i]), 5776 FieldTypes[i], /*TInfo=*/0, 5777 /*BitWidth=*/0, 5778 /*Mutable=*/false, 5779 ICIS_NoInit); 5780 Field->setAccess(AS_public); 5781 VaListTagDecl->addDecl(Field); 5782 } 5783 VaListTagDecl->completeDefinition(); 5784 QualType VaListTagType = Context->getRecordType(VaListTagDecl); 5785 Context->VaListTagTy = VaListTagType; 5786 5787 // } __va_list_tag; 5788 TypedefDecl *VaListTagTypedefDecl 5789 = TypedefDecl::Create(const_cast<ASTContext &>(*Context), 5790 Context->getTranslationUnitDecl(), 5791 SourceLocation(), SourceLocation(), 5792 &Context->Idents.get("__va_list_tag"), 5793 Context->getTrivialTypeSourceInfo(VaListTagType)); 5794 QualType VaListTagTypedefType = 5795 Context->getTypedefType(VaListTagTypedefDecl); 5796 5797 // typedef __va_list_tag __builtin_va_list[1]; 5798 llvm::APInt Size(Context->getTypeSize(Context->getSizeType()), 1); 5799 QualType VaListTagArrayType 5800 = Context->getConstantArrayType(VaListTagTypedefType, 5801 Size, ArrayType::Normal,0); 5802 TypeSourceInfo *TInfo 5803 = Context->getTrivialTypeSourceInfo(VaListTagArrayType); 5804 TypedefDecl *VaListTypedefDecl 5805 = TypedefDecl::Create(const_cast<ASTContext &>(*Context), 5806 Context->getTranslationUnitDecl(), 5807 SourceLocation(), SourceLocation(), 5808 &Context->Idents.get("__builtin_va_list"), 5809 TInfo); 5810 5811 return VaListTypedefDecl; 5812} 5813 5814static TypedefDecl *CreatePNaClABIBuiltinVaListDecl(const ASTContext *Context) { 5815 // typedef int __builtin_va_list[4]; 5816 llvm::APInt Size(Context->getTypeSize(Context->getSizeType()), 4); 5817 QualType IntArrayType 5818 = Context->getConstantArrayType(Context->IntTy, 5819 Size, ArrayType::Normal, 0); 5820 TypedefDecl *VaListTypedefDecl 5821 = TypedefDecl::Create(const_cast<ASTContext &>(*Context), 5822 Context->getTranslationUnitDecl(), 5823 SourceLocation(), SourceLocation(), 5824 &Context->Idents.get("__builtin_va_list"), 5825 Context->getTrivialTypeSourceInfo(IntArrayType)); 5826 5827 return VaListTypedefDecl; 5828} 5829 5830static TypedefDecl * 5831CreateAAPCSABIBuiltinVaListDecl(const ASTContext *Context) { 5832 RecordDecl *VaListDecl; 5833 if (Context->getLangOpts().CPlusPlus) { 5834 // namespace std { struct __va_list { 5835 NamespaceDecl *NS; 5836 NS = NamespaceDecl::Create(const_cast<ASTContext &>(*Context), 5837 Context->getTranslationUnitDecl(), 5838 /*Inline*/false, SourceLocation(), 5839 SourceLocation(), &Context->Idents.get("std"), 5840 /*PrevDecl*/0); 5841 5842 VaListDecl = CXXRecordDecl::Create(*Context, TTK_Struct, 5843 Context->getTranslationUnitDecl(), 5844 SourceLocation(), SourceLocation(), 5845 &Context->Idents.get("__va_list")); 5846 5847 VaListDecl->setDeclContext(NS); 5848 5849 } else { 5850 // struct __va_list { 5851 VaListDecl = CreateRecordDecl(*Context, TTK_Struct, 5852 Context->getTranslationUnitDecl(), 5853 &Context->Idents.get("__va_list")); 5854 } 5855 5856 VaListDecl->startDefinition(); 5857 5858 // void * __ap; 5859 FieldDecl *Field = FieldDecl::Create(const_cast<ASTContext &>(*Context), 5860 VaListDecl, 5861 SourceLocation(), 5862 SourceLocation(), 5863 &Context->Idents.get("__ap"), 5864 Context->getPointerType(Context->VoidTy), 5865 /*TInfo=*/0, 5866 /*BitWidth=*/0, 5867 /*Mutable=*/false, 5868 ICIS_NoInit); 5869 Field->setAccess(AS_public); 5870 VaListDecl->addDecl(Field); 5871 5872 // }; 5873 VaListDecl->completeDefinition(); 5874 5875 // typedef struct __va_list __builtin_va_list; 5876 TypeSourceInfo *TInfo 5877 = Context->getTrivialTypeSourceInfo(Context->getRecordType(VaListDecl)); 5878 5879 TypedefDecl *VaListTypeDecl 5880 = TypedefDecl::Create(const_cast<ASTContext &>(*Context), 5881 Context->getTranslationUnitDecl(), 5882 SourceLocation(), SourceLocation(), 5883 &Context->Idents.get("__builtin_va_list"), 5884 TInfo); 5885 5886 return VaListTypeDecl; 5887} 5888 5889static TypedefDecl *CreateVaListDecl(const ASTContext *Context, 5890 TargetInfo::BuiltinVaListKind Kind) { 5891 switch (Kind) { 5892 case TargetInfo::CharPtrBuiltinVaList: 5893 return CreateCharPtrBuiltinVaListDecl(Context); 5894 case TargetInfo::VoidPtrBuiltinVaList: 5895 return CreateVoidPtrBuiltinVaListDecl(Context); 5896 case TargetInfo::AArch64ABIBuiltinVaList: 5897 return CreateAArch64ABIBuiltinVaListDecl(Context); 5898 case TargetInfo::PowerABIBuiltinVaList: 5899 return CreatePowerABIBuiltinVaListDecl(Context); 5900 case TargetInfo::X86_64ABIBuiltinVaList: 5901 return CreateX86_64ABIBuiltinVaListDecl(Context); 5902 case TargetInfo::PNaClABIBuiltinVaList: 5903 return CreatePNaClABIBuiltinVaListDecl(Context); 5904 case TargetInfo::AAPCSABIBuiltinVaList: 5905 return CreateAAPCSABIBuiltinVaListDecl(Context); 5906 } 5907 5908 llvm_unreachable("Unhandled __builtin_va_list type kind"); 5909} 5910 5911TypedefDecl *ASTContext::getBuiltinVaListDecl() const { 5912 if (!BuiltinVaListDecl) 5913 BuiltinVaListDecl = CreateVaListDecl(this, Target->getBuiltinVaListKind()); 5914 5915 return BuiltinVaListDecl; 5916} 5917 5918QualType ASTContext::getVaListTagType() const { 5919 // Force the creation of VaListTagTy by building the __builtin_va_list 5920 // declaration. 5921 if (VaListTagTy.isNull()) 5922 (void) getBuiltinVaListDecl(); 5923 5924 return VaListTagTy; 5925} 5926 5927void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 5928 assert(ObjCConstantStringType.isNull() && 5929 "'NSConstantString' type already set!"); 5930 5931 ObjCConstantStringType = getObjCInterfaceType(Decl); 5932} 5933 5934/// \brief Retrieve the template name that corresponds to a non-empty 5935/// lookup. 5936TemplateName 5937ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 5938 UnresolvedSetIterator End) const { 5939 unsigned size = End - Begin; 5940 assert(size > 1 && "set is not overloaded!"); 5941 5942 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 5943 size * sizeof(FunctionTemplateDecl*)); 5944 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 5945 5946 NamedDecl **Storage = OT->getStorage(); 5947 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 5948 NamedDecl *D = *I; 5949 assert(isa<FunctionTemplateDecl>(D) || 5950 (isa<UsingShadowDecl>(D) && 5951 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 5952 *Storage++ = D; 5953 } 5954 5955 return TemplateName(OT); 5956} 5957 5958/// \brief Retrieve the template name that represents a qualified 5959/// template name such as \c std::vector. 5960TemplateName 5961ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 5962 bool TemplateKeyword, 5963 TemplateDecl *Template) const { 5964 assert(NNS && "Missing nested-name-specifier in qualified template name"); 5965 5966 // FIXME: Canonicalization? 5967 llvm::FoldingSetNodeID ID; 5968 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 5969 5970 void *InsertPos = 0; 5971 QualifiedTemplateName *QTN = 5972 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5973 if (!QTN) { 5974 QTN = new (*this, llvm::alignOf<QualifiedTemplateName>()) 5975 QualifiedTemplateName(NNS, TemplateKeyword, Template); 5976 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 5977 } 5978 5979 return TemplateName(QTN); 5980} 5981 5982/// \brief Retrieve the template name that represents a dependent 5983/// template name such as \c MetaFun::template apply. 5984TemplateName 5985ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 5986 const IdentifierInfo *Name) const { 5987 assert((!NNS || NNS->isDependent()) && 5988 "Nested name specifier must be dependent"); 5989 5990 llvm::FoldingSetNodeID ID; 5991 DependentTemplateName::Profile(ID, NNS, Name); 5992 5993 void *InsertPos = 0; 5994 DependentTemplateName *QTN = 5995 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5996 5997 if (QTN) 5998 return TemplateName(QTN); 5999 6000 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 6001 if (CanonNNS == NNS) { 6002 QTN = new (*this, llvm::alignOf<DependentTemplateName>()) 6003 DependentTemplateName(NNS, Name); 6004 } else { 6005 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 6006 QTN = new (*this, llvm::alignOf<DependentTemplateName>()) 6007 DependentTemplateName(NNS, Name, Canon); 6008 DependentTemplateName *CheckQTN = 6009 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 6010 assert(!CheckQTN && "Dependent type name canonicalization broken"); 6011 (void)CheckQTN; 6012 } 6013 6014 DependentTemplateNames.InsertNode(QTN, InsertPos); 6015 return TemplateName(QTN); 6016} 6017 6018/// \brief Retrieve the template name that represents a dependent 6019/// template name such as \c MetaFun::template operator+. 6020TemplateName 6021ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 6022 OverloadedOperatorKind Operator) const { 6023 assert((!NNS || NNS->isDependent()) && 6024 "Nested name specifier must be dependent"); 6025 6026 llvm::FoldingSetNodeID ID; 6027 DependentTemplateName::Profile(ID, NNS, Operator); 6028 6029 void *InsertPos = 0; 6030 DependentTemplateName *QTN 6031 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 6032 6033 if (QTN) 6034 return TemplateName(QTN); 6035 6036 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 6037 if (CanonNNS == NNS) { 6038 QTN = new (*this, llvm::alignOf<DependentTemplateName>()) 6039 DependentTemplateName(NNS, Operator); 6040 } else { 6041 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 6042 QTN = new (*this, llvm::alignOf<DependentTemplateName>()) 6043 DependentTemplateName(NNS, Operator, Canon); 6044 6045 DependentTemplateName *CheckQTN 6046 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 6047 assert(!CheckQTN && "Dependent template name canonicalization broken"); 6048 (void)CheckQTN; 6049 } 6050 6051 DependentTemplateNames.InsertNode(QTN, InsertPos); 6052 return TemplateName(QTN); 6053} 6054 6055TemplateName 6056ASTContext::getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 6057 TemplateName replacement) const { 6058 llvm::FoldingSetNodeID ID; 6059 SubstTemplateTemplateParmStorage::Profile(ID, param, replacement); 6060 6061 void *insertPos = 0; 6062 SubstTemplateTemplateParmStorage *subst 6063 = SubstTemplateTemplateParms.FindNodeOrInsertPos(ID, insertPos); 6064 6065 if (!subst) { 6066 subst = new (*this) SubstTemplateTemplateParmStorage(param, replacement); 6067 SubstTemplateTemplateParms.InsertNode(subst, insertPos); 6068 } 6069 6070 return TemplateName(subst); 6071} 6072 6073TemplateName 6074ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 6075 const TemplateArgument &ArgPack) const { 6076 ASTContext &Self = const_cast<ASTContext &>(*this); 6077 llvm::FoldingSetNodeID ID; 6078 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 6079 6080 void *InsertPos = 0; 6081 SubstTemplateTemplateParmPackStorage *Subst 6082 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 6083 6084 if (!Subst) { 6085 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Param, 6086 ArgPack.pack_size(), 6087 ArgPack.pack_begin()); 6088 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 6089 } 6090 6091 return TemplateName(Subst); 6092} 6093 6094/// getFromTargetType - Given one of the integer types provided by 6095/// TargetInfo, produce the corresponding type. The unsigned @p Type 6096/// is actually a value of type @c TargetInfo::IntType. 6097CanQualType ASTContext::getFromTargetType(unsigned Type) const { 6098 switch (Type) { 6099 case TargetInfo::NoInt: return CanQualType(); 6100 case TargetInfo::SignedShort: return ShortTy; 6101 case TargetInfo::UnsignedShort: return UnsignedShortTy; 6102 case TargetInfo::SignedInt: return IntTy; 6103 case TargetInfo::UnsignedInt: return UnsignedIntTy; 6104 case TargetInfo::SignedLong: return LongTy; 6105 case TargetInfo::UnsignedLong: return UnsignedLongTy; 6106 case TargetInfo::SignedLongLong: return LongLongTy; 6107 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 6108 } 6109 6110 llvm_unreachable("Unhandled TargetInfo::IntType value"); 6111} 6112 6113//===----------------------------------------------------------------------===// 6114// Type Predicates. 6115//===----------------------------------------------------------------------===// 6116 6117/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 6118/// garbage collection attribute. 6119/// 6120Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 6121 if (getLangOpts().getGC() == LangOptions::NonGC) 6122 return Qualifiers::GCNone; 6123 6124 assert(getLangOpts().ObjC1); 6125 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 6126 6127 // Default behaviour under objective-C's gc is for ObjC pointers 6128 // (or pointers to them) be treated as though they were declared 6129 // as __strong. 6130 if (GCAttrs == Qualifiers::GCNone) { 6131 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 6132 return Qualifiers::Strong; 6133 else if (Ty->isPointerType()) 6134 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 6135 } else { 6136 // It's not valid to set GC attributes on anything that isn't a 6137 // pointer. 6138#ifndef NDEBUG 6139 QualType CT = Ty->getCanonicalTypeInternal(); 6140 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 6141 CT = AT->getElementType(); 6142 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 6143#endif 6144 } 6145 return GCAttrs; 6146} 6147 6148//===----------------------------------------------------------------------===// 6149// Type Compatibility Testing 6150//===----------------------------------------------------------------------===// 6151 6152/// areCompatVectorTypes - Return true if the two specified vector types are 6153/// compatible. 6154static bool areCompatVectorTypes(const VectorType *LHS, 6155 const VectorType *RHS) { 6156 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 6157 return LHS->getElementType() == RHS->getElementType() && 6158 LHS->getNumElements() == RHS->getNumElements(); 6159} 6160 6161bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 6162 QualType SecondVec) { 6163 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 6164 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 6165 6166 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 6167 return true; 6168 6169 // Treat Neon vector types and most AltiVec vector types as if they are the 6170 // equivalent GCC vector types. 6171 const VectorType *First = FirstVec->getAs<VectorType>(); 6172 const VectorType *Second = SecondVec->getAs<VectorType>(); 6173 if (First->getNumElements() == Second->getNumElements() && 6174 hasSameType(First->getElementType(), Second->getElementType()) && 6175 First->getVectorKind() != VectorType::AltiVecPixel && 6176 First->getVectorKind() != VectorType::AltiVecBool && 6177 Second->getVectorKind() != VectorType::AltiVecPixel && 6178 Second->getVectorKind() != VectorType::AltiVecBool) 6179 return true; 6180 6181 return false; 6182} 6183 6184//===----------------------------------------------------------------------===// 6185// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 6186//===----------------------------------------------------------------------===// 6187 6188/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 6189/// inheritance hierarchy of 'rProto'. 6190bool 6191ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 6192 ObjCProtocolDecl *rProto) const { 6193 if (declaresSameEntity(lProto, rProto)) 6194 return true; 6195 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 6196 E = rProto->protocol_end(); PI != E; ++PI) 6197 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 6198 return true; 6199 return false; 6200} 6201 6202/// QualifiedIdConformsQualifiedId - compare id<pr,...> with id<pr1,...> 6203/// return true if lhs's protocols conform to rhs's protocol; false 6204/// otherwise. 6205bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 6206 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 6207 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 6208 return false; 6209} 6210 6211/// ObjCQualifiedClassTypesAreCompatible - compare Class<pr,...> and 6212/// Class<pr1, ...>. 6213bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 6214 QualType rhs) { 6215 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 6216 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 6217 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 6218 6219 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 6220 E = lhsQID->qual_end(); I != E; ++I) { 6221 bool match = false; 6222 ObjCProtocolDecl *lhsProto = *I; 6223 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 6224 E = rhsOPT->qual_end(); J != E; ++J) { 6225 ObjCProtocolDecl *rhsProto = *J; 6226 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 6227 match = true; 6228 break; 6229 } 6230 } 6231 if (!match) 6232 return false; 6233 } 6234 return true; 6235} 6236 6237/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 6238/// ObjCQualifiedIDType. 6239bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 6240 bool compare) { 6241 // Allow id<P..> and an 'id' or void* type in all cases. 6242 if (lhs->isVoidPointerType() || 6243 lhs->isObjCIdType() || lhs->isObjCClassType()) 6244 return true; 6245 else if (rhs->isVoidPointerType() || 6246 rhs->isObjCIdType() || rhs->isObjCClassType()) 6247 return true; 6248 6249 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 6250 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 6251 6252 if (!rhsOPT) return false; 6253 6254 if (rhsOPT->qual_empty()) { 6255 // If the RHS is a unqualified interface pointer "NSString*", 6256 // make sure we check the class hierarchy. 6257 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 6258 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 6259 E = lhsQID->qual_end(); I != E; ++I) { 6260 // when comparing an id<P> on lhs with a static type on rhs, 6261 // see if static class implements all of id's protocols, directly or 6262 // through its super class and categories. 6263 if (!rhsID->ClassImplementsProtocol(*I, true)) 6264 return false; 6265 } 6266 } 6267 // If there are no qualifiers and no interface, we have an 'id'. 6268 return true; 6269 } 6270 // Both the right and left sides have qualifiers. 6271 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 6272 E = lhsQID->qual_end(); I != E; ++I) { 6273 ObjCProtocolDecl *lhsProto = *I; 6274 bool match = false; 6275 6276 // when comparing an id<P> on lhs with a static type on rhs, 6277 // see if static class implements all of id's protocols, directly or 6278 // through its super class and categories. 6279 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 6280 E = rhsOPT->qual_end(); J != E; ++J) { 6281 ObjCProtocolDecl *rhsProto = *J; 6282 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 6283 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 6284 match = true; 6285 break; 6286 } 6287 } 6288 // If the RHS is a qualified interface pointer "NSString<P>*", 6289 // make sure we check the class hierarchy. 6290 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 6291 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 6292 E = lhsQID->qual_end(); I != E; ++I) { 6293 // when comparing an id<P> on lhs with a static type on rhs, 6294 // see if static class implements all of id's protocols, directly or 6295 // through its super class and categories. 6296 if (rhsID->ClassImplementsProtocol(*I, true)) { 6297 match = true; 6298 break; 6299 } 6300 } 6301 } 6302 if (!match) 6303 return false; 6304 } 6305 6306 return true; 6307 } 6308 6309 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 6310 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 6311 6312 if (const ObjCObjectPointerType *lhsOPT = 6313 lhs->getAsObjCInterfacePointerType()) { 6314 // If both the right and left sides have qualifiers. 6315 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 6316 E = lhsOPT->qual_end(); I != E; ++I) { 6317 ObjCProtocolDecl *lhsProto = *I; 6318 bool match = false; 6319 6320 // when comparing an id<P> on rhs with a static type on lhs, 6321 // see if static class implements all of id's protocols, directly or 6322 // through its super class and categories. 6323 // First, lhs protocols in the qualifier list must be found, direct 6324 // or indirect in rhs's qualifier list or it is a mismatch. 6325 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 6326 E = rhsQID->qual_end(); J != E; ++J) { 6327 ObjCProtocolDecl *rhsProto = *J; 6328 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 6329 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 6330 match = true; 6331 break; 6332 } 6333 } 6334 if (!match) 6335 return false; 6336 } 6337 6338 // Static class's protocols, or its super class or category protocols 6339 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 6340 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 6341 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 6342 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 6343 // This is rather dubious but matches gcc's behavior. If lhs has 6344 // no type qualifier and its class has no static protocol(s) 6345 // assume that it is mismatch. 6346 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 6347 return false; 6348 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 6349 LHSInheritedProtocols.begin(), 6350 E = LHSInheritedProtocols.end(); I != E; ++I) { 6351 bool match = false; 6352 ObjCProtocolDecl *lhsProto = (*I); 6353 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 6354 E = rhsQID->qual_end(); J != E; ++J) { 6355 ObjCProtocolDecl *rhsProto = *J; 6356 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 6357 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 6358 match = true; 6359 break; 6360 } 6361 } 6362 if (!match) 6363 return false; 6364 } 6365 } 6366 return true; 6367 } 6368 return false; 6369} 6370 6371/// canAssignObjCInterfaces - Return true if the two interface types are 6372/// compatible for assignment from RHS to LHS. This handles validation of any 6373/// protocol qualifiers on the LHS or RHS. 6374/// 6375bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 6376 const ObjCObjectPointerType *RHSOPT) { 6377 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 6378 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 6379 6380 // If either type represents the built-in 'id' or 'Class' types, return true. 6381 if (LHS->isObjCUnqualifiedIdOrClass() || 6382 RHS->isObjCUnqualifiedIdOrClass()) 6383 return true; 6384 6385 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 6386 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 6387 QualType(RHSOPT,0), 6388 false); 6389 6390 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 6391 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 6392 QualType(RHSOPT,0)); 6393 6394 // If we have 2 user-defined types, fall into that path. 6395 if (LHS->getInterface() && RHS->getInterface()) 6396 return canAssignObjCInterfaces(LHS, RHS); 6397 6398 return false; 6399} 6400 6401/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 6402/// for providing type-safety for objective-c pointers used to pass/return 6403/// arguments in block literals. When passed as arguments, passing 'A*' where 6404/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 6405/// not OK. For the return type, the opposite is not OK. 6406bool ASTContext::canAssignObjCInterfacesInBlockPointer( 6407 const ObjCObjectPointerType *LHSOPT, 6408 const ObjCObjectPointerType *RHSOPT, 6409 bool BlockReturnType) { 6410 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 6411 return true; 6412 6413 if (LHSOPT->isObjCBuiltinType()) { 6414 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 6415 } 6416 6417 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 6418 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 6419 QualType(RHSOPT,0), 6420 false); 6421 6422 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 6423 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 6424 if (LHS && RHS) { // We have 2 user-defined types. 6425 if (LHS != RHS) { 6426 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 6427 return BlockReturnType; 6428 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 6429 return !BlockReturnType; 6430 } 6431 else 6432 return true; 6433 } 6434 return false; 6435} 6436 6437/// getIntersectionOfProtocols - This routine finds the intersection of set 6438/// of protocols inherited from two distinct objective-c pointer objects. 6439/// It is used to build composite qualifier list of the composite type of 6440/// the conditional expression involving two objective-c pointer objects. 6441static 6442void getIntersectionOfProtocols(ASTContext &Context, 6443 const ObjCObjectPointerType *LHSOPT, 6444 const ObjCObjectPointerType *RHSOPT, 6445 SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 6446 6447 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 6448 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 6449 assert(LHS->getInterface() && "LHS must have an interface base"); 6450 assert(RHS->getInterface() && "RHS must have an interface base"); 6451 6452 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 6453 unsigned LHSNumProtocols = LHS->getNumProtocols(); 6454 if (LHSNumProtocols > 0) 6455 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 6456 else { 6457 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 6458 Context.CollectInheritedProtocols(LHS->getInterface(), 6459 LHSInheritedProtocols); 6460 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 6461 LHSInheritedProtocols.end()); 6462 } 6463 6464 unsigned RHSNumProtocols = RHS->getNumProtocols(); 6465 if (RHSNumProtocols > 0) { 6466 ObjCProtocolDecl **RHSProtocols = 6467 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 6468 for (unsigned i = 0; i < RHSNumProtocols; ++i) 6469 if (InheritedProtocolSet.count(RHSProtocols[i])) 6470 IntersectionOfProtocols.push_back(RHSProtocols[i]); 6471 } else { 6472 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 6473 Context.CollectInheritedProtocols(RHS->getInterface(), 6474 RHSInheritedProtocols); 6475 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 6476 RHSInheritedProtocols.begin(), 6477 E = RHSInheritedProtocols.end(); I != E; ++I) 6478 if (InheritedProtocolSet.count((*I))) 6479 IntersectionOfProtocols.push_back((*I)); 6480 } 6481} 6482 6483/// areCommonBaseCompatible - Returns common base class of the two classes if 6484/// one found. Note that this is O'2 algorithm. But it will be called as the 6485/// last type comparison in a ?-exp of ObjC pointer types before a 6486/// warning is issued. So, its invokation is extremely rare. 6487QualType ASTContext::areCommonBaseCompatible( 6488 const ObjCObjectPointerType *Lptr, 6489 const ObjCObjectPointerType *Rptr) { 6490 const ObjCObjectType *LHS = Lptr->getObjectType(); 6491 const ObjCObjectType *RHS = Rptr->getObjectType(); 6492 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 6493 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 6494 if (!LDecl || !RDecl || (declaresSameEntity(LDecl, RDecl))) 6495 return QualType(); 6496 6497 do { 6498 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 6499 if (canAssignObjCInterfaces(LHS, RHS)) { 6500 SmallVector<ObjCProtocolDecl *, 8> Protocols; 6501 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 6502 6503 QualType Result = QualType(LHS, 0); 6504 if (!Protocols.empty()) 6505 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 6506 Result = getObjCObjectPointerType(Result); 6507 return Result; 6508 } 6509 } while ((LDecl = LDecl->getSuperClass())); 6510 6511 return QualType(); 6512} 6513 6514bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 6515 const ObjCObjectType *RHS) { 6516 assert(LHS->getInterface() && "LHS is not an interface type"); 6517 assert(RHS->getInterface() && "RHS is not an interface type"); 6518 6519 // Verify that the base decls are compatible: the RHS must be a subclass of 6520 // the LHS. 6521 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 6522 return false; 6523 6524 // RHS must have a superset of the protocols in the LHS. If the LHS is not 6525 // protocol qualified at all, then we are good. 6526 if (LHS->getNumProtocols() == 0) 6527 return true; 6528 6529 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 6530 // more detailed analysis is required. 6531 if (RHS->getNumProtocols() == 0) { 6532 // OK, if LHS is a superclass of RHS *and* 6533 // this superclass is assignment compatible with LHS. 6534 // false otherwise. 6535 bool IsSuperClass = 6536 LHS->getInterface()->isSuperClassOf(RHS->getInterface()); 6537 if (IsSuperClass) { 6538 // OK if conversion of LHS to SuperClass results in narrowing of types 6539 // ; i.e., SuperClass may implement at least one of the protocols 6540 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 6541 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 6542 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 6543 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols); 6544 // If super class has no protocols, it is not a match. 6545 if (SuperClassInheritedProtocols.empty()) 6546 return false; 6547 6548 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 6549 LHSPE = LHS->qual_end(); 6550 LHSPI != LHSPE; LHSPI++) { 6551 bool SuperImplementsProtocol = false; 6552 ObjCProtocolDecl *LHSProto = (*LHSPI); 6553 6554 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 6555 SuperClassInheritedProtocols.begin(), 6556 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 6557 ObjCProtocolDecl *SuperClassProto = (*I); 6558 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 6559 SuperImplementsProtocol = true; 6560 break; 6561 } 6562 } 6563 if (!SuperImplementsProtocol) 6564 return false; 6565 } 6566 return true; 6567 } 6568 return false; 6569 } 6570 6571 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 6572 LHSPE = LHS->qual_end(); 6573 LHSPI != LHSPE; LHSPI++) { 6574 bool RHSImplementsProtocol = false; 6575 6576 // If the RHS doesn't implement the protocol on the left, the types 6577 // are incompatible. 6578 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 6579 RHSPE = RHS->qual_end(); 6580 RHSPI != RHSPE; RHSPI++) { 6581 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 6582 RHSImplementsProtocol = true; 6583 break; 6584 } 6585 } 6586 // FIXME: For better diagnostics, consider passing back the protocol name. 6587 if (!RHSImplementsProtocol) 6588 return false; 6589 } 6590 // The RHS implements all protocols listed on the LHS. 6591 return true; 6592} 6593 6594bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 6595 // get the "pointed to" types 6596 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 6597 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 6598 6599 if (!LHSOPT || !RHSOPT) 6600 return false; 6601 6602 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 6603 canAssignObjCInterfaces(RHSOPT, LHSOPT); 6604} 6605 6606bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 6607 return canAssignObjCInterfaces( 6608 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 6609 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 6610} 6611 6612/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 6613/// both shall have the identically qualified version of a compatible type. 6614/// C99 6.2.7p1: Two types have compatible types if their types are the 6615/// same. See 6.7.[2,3,5] for additional rules. 6616bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 6617 bool CompareUnqualified) { 6618 if (getLangOpts().CPlusPlus) 6619 return hasSameType(LHS, RHS); 6620 6621 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 6622} 6623 6624bool ASTContext::propertyTypesAreCompatible(QualType LHS, QualType RHS) { 6625 return typesAreCompatible(LHS, RHS); 6626} 6627 6628bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 6629 return !mergeTypes(LHS, RHS, true).isNull(); 6630} 6631 6632/// mergeTransparentUnionType - if T is a transparent union type and a member 6633/// of T is compatible with SubType, return the merged type, else return 6634/// QualType() 6635QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 6636 bool OfBlockPointer, 6637 bool Unqualified) { 6638 if (const RecordType *UT = T->getAsUnionType()) { 6639 RecordDecl *UD = UT->getDecl(); 6640 if (UD->hasAttr<TransparentUnionAttr>()) { 6641 for (RecordDecl::field_iterator it = UD->field_begin(), 6642 itend = UD->field_end(); it != itend; ++it) { 6643 QualType ET = it->getType().getUnqualifiedType(); 6644 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 6645 if (!MT.isNull()) 6646 return MT; 6647 } 6648 } 6649 } 6650 6651 return QualType(); 6652} 6653 6654/// mergeFunctionArgumentTypes - merge two types which appear as function 6655/// argument types 6656QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 6657 bool OfBlockPointer, 6658 bool Unqualified) { 6659 // GNU extension: two types are compatible if they appear as a function 6660 // argument, one of the types is a transparent union type and the other 6661 // type is compatible with a union member 6662 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 6663 Unqualified); 6664 if (!lmerge.isNull()) 6665 return lmerge; 6666 6667 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 6668 Unqualified); 6669 if (!rmerge.isNull()) 6670 return rmerge; 6671 6672 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 6673} 6674 6675QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 6676 bool OfBlockPointer, 6677 bool Unqualified) { 6678 const FunctionType *lbase = lhs->getAs<FunctionType>(); 6679 const FunctionType *rbase = rhs->getAs<FunctionType>(); 6680 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 6681 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 6682 bool allLTypes = true; 6683 bool allRTypes = true; 6684 6685 // Check return type 6686 QualType retType; 6687 if (OfBlockPointer) { 6688 QualType RHS = rbase->getResultType(); 6689 QualType LHS = lbase->getResultType(); 6690 bool UnqualifiedResult = Unqualified; 6691 if (!UnqualifiedResult) 6692 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 6693 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 6694 } 6695 else 6696 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 6697 Unqualified); 6698 if (retType.isNull()) return QualType(); 6699 6700 if (Unqualified) 6701 retType = retType.getUnqualifiedType(); 6702 6703 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 6704 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 6705 if (Unqualified) { 6706 LRetType = LRetType.getUnqualifiedType(); 6707 RRetType = RRetType.getUnqualifiedType(); 6708 } 6709 6710 if (getCanonicalType(retType) != LRetType) 6711 allLTypes = false; 6712 if (getCanonicalType(retType) != RRetType) 6713 allRTypes = false; 6714 6715 // FIXME: double check this 6716 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 6717 // rbase->getRegParmAttr() != 0 && 6718 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 6719 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 6720 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 6721 6722 // Compatible functions must have compatible calling conventions 6723 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 6724 return QualType(); 6725 6726 // Regparm is part of the calling convention. 6727 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm()) 6728 return QualType(); 6729 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 6730 return QualType(); 6731 6732 if (lbaseInfo.getProducesResult() != rbaseInfo.getProducesResult()) 6733 return QualType(); 6734 6735 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 6736 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 6737 6738 if (lbaseInfo.getNoReturn() != NoReturn) 6739 allLTypes = false; 6740 if (rbaseInfo.getNoReturn() != NoReturn) 6741 allRTypes = false; 6742 6743 FunctionType::ExtInfo einfo = lbaseInfo.withNoReturn(NoReturn); 6744 6745 if (lproto && rproto) { // two C99 style function prototypes 6746 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 6747 "C++ shouldn't be here"); 6748 unsigned lproto_nargs = lproto->getNumArgs(); 6749 unsigned rproto_nargs = rproto->getNumArgs(); 6750 6751 // Compatible functions must have the same number of arguments 6752 if (lproto_nargs != rproto_nargs) 6753 return QualType(); 6754 6755 // Variadic and non-variadic functions aren't compatible 6756 if (lproto->isVariadic() != rproto->isVariadic()) 6757 return QualType(); 6758 6759 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 6760 return QualType(); 6761 6762 if (LangOpts.ObjCAutoRefCount && 6763 !FunctionTypesMatchOnNSConsumedAttrs(rproto, lproto)) 6764 return QualType(); 6765 6766 // Check argument compatibility 6767 SmallVector<QualType, 10> types; 6768 for (unsigned i = 0; i < lproto_nargs; i++) { 6769 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 6770 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 6771 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 6772 OfBlockPointer, 6773 Unqualified); 6774 if (argtype.isNull()) return QualType(); 6775 6776 if (Unqualified) 6777 argtype = argtype.getUnqualifiedType(); 6778 6779 types.push_back(argtype); 6780 if (Unqualified) { 6781 largtype = largtype.getUnqualifiedType(); 6782 rargtype = rargtype.getUnqualifiedType(); 6783 } 6784 6785 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 6786 allLTypes = false; 6787 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 6788 allRTypes = false; 6789 } 6790 6791 if (allLTypes) return lhs; 6792 if (allRTypes) return rhs; 6793 6794 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 6795 EPI.ExtInfo = einfo; 6796 return getFunctionType(retType, types.begin(), types.size(), EPI); 6797 } 6798 6799 if (lproto) allRTypes = false; 6800 if (rproto) allLTypes = false; 6801 6802 const FunctionProtoType *proto = lproto ? lproto : rproto; 6803 if (proto) { 6804 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 6805 if (proto->isVariadic()) return QualType(); 6806 // Check that the types are compatible with the types that 6807 // would result from default argument promotions (C99 6.7.5.3p15). 6808 // The only types actually affected are promotable integer 6809 // types and floats, which would be passed as a different 6810 // type depending on whether the prototype is visible. 6811 unsigned proto_nargs = proto->getNumArgs(); 6812 for (unsigned i = 0; i < proto_nargs; ++i) { 6813 QualType argTy = proto->getArgType(i); 6814 6815 // Look at the converted type of enum types, since that is the type used 6816 // to pass enum values. 6817 if (const EnumType *Enum = argTy->getAs<EnumType>()) { 6818 argTy = Enum->getDecl()->getIntegerType(); 6819 if (argTy.isNull()) 6820 return QualType(); 6821 } 6822 6823 if (argTy->isPromotableIntegerType() || 6824 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 6825 return QualType(); 6826 } 6827 6828 if (allLTypes) return lhs; 6829 if (allRTypes) return rhs; 6830 6831 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 6832 EPI.ExtInfo = einfo; 6833 return getFunctionType(retType, proto->arg_type_begin(), 6834 proto->getNumArgs(), EPI); 6835 } 6836 6837 if (allLTypes) return lhs; 6838 if (allRTypes) return rhs; 6839 return getFunctionNoProtoType(retType, einfo); 6840} 6841 6842QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 6843 bool OfBlockPointer, 6844 bool Unqualified, bool BlockReturnType) { 6845 // C++ [expr]: If an expression initially has the type "reference to T", the 6846 // type is adjusted to "T" prior to any further analysis, the expression 6847 // designates the object or function denoted by the reference, and the 6848 // expression is an lvalue unless the reference is an rvalue reference and 6849 // the expression is a function call (possibly inside parentheses). 6850 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 6851 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 6852 6853 if (Unqualified) { 6854 LHS = LHS.getUnqualifiedType(); 6855 RHS = RHS.getUnqualifiedType(); 6856 } 6857 6858 QualType LHSCan = getCanonicalType(LHS), 6859 RHSCan = getCanonicalType(RHS); 6860 6861 // If two types are identical, they are compatible. 6862 if (LHSCan == RHSCan) 6863 return LHS; 6864 6865 // If the qualifiers are different, the types aren't compatible... mostly. 6866 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 6867 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 6868 if (LQuals != RQuals) { 6869 // If any of these qualifiers are different, we have a type 6870 // mismatch. 6871 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 6872 LQuals.getAddressSpace() != RQuals.getAddressSpace() || 6873 LQuals.getObjCLifetime() != RQuals.getObjCLifetime()) 6874 return QualType(); 6875 6876 // Exactly one GC qualifier difference is allowed: __strong is 6877 // okay if the other type has no GC qualifier but is an Objective 6878 // C object pointer (i.e. implicitly strong by default). We fix 6879 // this by pretending that the unqualified type was actually 6880 // qualified __strong. 6881 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 6882 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 6883 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 6884 6885 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 6886 return QualType(); 6887 6888 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 6889 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 6890 } 6891 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 6892 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 6893 } 6894 return QualType(); 6895 } 6896 6897 // Okay, qualifiers are equal. 6898 6899 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 6900 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 6901 6902 // We want to consider the two function types to be the same for these 6903 // comparisons, just force one to the other. 6904 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 6905 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 6906 6907 // Same as above for arrays 6908 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 6909 LHSClass = Type::ConstantArray; 6910 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 6911 RHSClass = Type::ConstantArray; 6912 6913 // ObjCInterfaces are just specialized ObjCObjects. 6914 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 6915 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 6916 6917 // Canonicalize ExtVector -> Vector. 6918 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 6919 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 6920 6921 // If the canonical type classes don't match. 6922 if (LHSClass != RHSClass) { 6923 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 6924 // a signed integer type, or an unsigned integer type. 6925 // Compatibility is based on the underlying type, not the promotion 6926 // type. 6927 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 6928 QualType TINT = ETy->getDecl()->getIntegerType(); 6929 if (!TINT.isNull() && hasSameType(TINT, RHSCan.getUnqualifiedType())) 6930 return RHS; 6931 } 6932 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 6933 QualType TINT = ETy->getDecl()->getIntegerType(); 6934 if (!TINT.isNull() && hasSameType(TINT, LHSCan.getUnqualifiedType())) 6935 return LHS; 6936 } 6937 // allow block pointer type to match an 'id' type. 6938 if (OfBlockPointer && !BlockReturnType) { 6939 if (LHS->isObjCIdType() && RHS->isBlockPointerType()) 6940 return LHS; 6941 if (RHS->isObjCIdType() && LHS->isBlockPointerType()) 6942 return RHS; 6943 } 6944 6945 return QualType(); 6946 } 6947 6948 // The canonical type classes match. 6949 switch (LHSClass) { 6950#define TYPE(Class, Base) 6951#define ABSTRACT_TYPE(Class, Base) 6952#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 6953#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 6954#define DEPENDENT_TYPE(Class, Base) case Type::Class: 6955#include "clang/AST/TypeNodes.def" 6956 llvm_unreachable("Non-canonical and dependent types shouldn't get here"); 6957 6958 case Type::LValueReference: 6959 case Type::RValueReference: 6960 case Type::MemberPointer: 6961 llvm_unreachable("C++ should never be in mergeTypes"); 6962 6963 case Type::ObjCInterface: 6964 case Type::IncompleteArray: 6965 case Type::VariableArray: 6966 case Type::FunctionProto: 6967 case Type::ExtVector: 6968 llvm_unreachable("Types are eliminated above"); 6969 6970 case Type::Pointer: 6971 { 6972 // Merge two pointer types, while trying to preserve typedef info 6973 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 6974 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 6975 if (Unqualified) { 6976 LHSPointee = LHSPointee.getUnqualifiedType(); 6977 RHSPointee = RHSPointee.getUnqualifiedType(); 6978 } 6979 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 6980 Unqualified); 6981 if (ResultType.isNull()) return QualType(); 6982 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 6983 return LHS; 6984 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 6985 return RHS; 6986 return getPointerType(ResultType); 6987 } 6988 case Type::BlockPointer: 6989 { 6990 // Merge two block pointer types, while trying to preserve typedef info 6991 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 6992 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 6993 if (Unqualified) { 6994 LHSPointee = LHSPointee.getUnqualifiedType(); 6995 RHSPointee = RHSPointee.getUnqualifiedType(); 6996 } 6997 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 6998 Unqualified); 6999 if (ResultType.isNull()) return QualType(); 7000 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 7001 return LHS; 7002 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 7003 return RHS; 7004 return getBlockPointerType(ResultType); 7005 } 7006 case Type::Atomic: 7007 { 7008 // Merge two pointer types, while trying to preserve typedef info 7009 QualType LHSValue = LHS->getAs<AtomicType>()->getValueType(); 7010 QualType RHSValue = RHS->getAs<AtomicType>()->getValueType(); 7011 if (Unqualified) { 7012 LHSValue = LHSValue.getUnqualifiedType(); 7013 RHSValue = RHSValue.getUnqualifiedType(); 7014 } 7015 QualType ResultType = mergeTypes(LHSValue, RHSValue, false, 7016 Unqualified); 7017 if (ResultType.isNull()) return QualType(); 7018 if (getCanonicalType(LHSValue) == getCanonicalType(ResultType)) 7019 return LHS; 7020 if (getCanonicalType(RHSValue) == getCanonicalType(ResultType)) 7021 return RHS; 7022 return getAtomicType(ResultType); 7023 } 7024 case Type::ConstantArray: 7025 { 7026 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 7027 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 7028 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 7029 return QualType(); 7030 7031 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 7032 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 7033 if (Unqualified) { 7034 LHSElem = LHSElem.getUnqualifiedType(); 7035 RHSElem = RHSElem.getUnqualifiedType(); 7036 } 7037 7038 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 7039 if (ResultType.isNull()) return QualType(); 7040 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 7041 return LHS; 7042 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 7043 return RHS; 7044 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 7045 ArrayType::ArraySizeModifier(), 0); 7046 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 7047 ArrayType::ArraySizeModifier(), 0); 7048 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 7049 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 7050 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 7051 return LHS; 7052 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 7053 return RHS; 7054 if (LVAT) { 7055 // FIXME: This isn't correct! But tricky to implement because 7056 // the array's size has to be the size of LHS, but the type 7057 // has to be different. 7058 return LHS; 7059 } 7060 if (RVAT) { 7061 // FIXME: This isn't correct! But tricky to implement because 7062 // the array's size has to be the size of RHS, but the type 7063 // has to be different. 7064 return RHS; 7065 } 7066 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 7067 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 7068 return getIncompleteArrayType(ResultType, 7069 ArrayType::ArraySizeModifier(), 0); 7070 } 7071 case Type::FunctionNoProto: 7072 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 7073 case Type::Record: 7074 case Type::Enum: 7075 return QualType(); 7076 case Type::Builtin: 7077 // Only exactly equal builtin types are compatible, which is tested above. 7078 return QualType(); 7079 case Type::Complex: 7080 // Distinct complex types are incompatible. 7081 return QualType(); 7082 case Type::Vector: 7083 // FIXME: The merged type should be an ExtVector! 7084 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 7085 RHSCan->getAs<VectorType>())) 7086 return LHS; 7087 return QualType(); 7088 case Type::ObjCObject: { 7089 // Check if the types are assignment compatible. 7090 // FIXME: This should be type compatibility, e.g. whether 7091 // "LHS x; RHS x;" at global scope is legal. 7092 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 7093 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 7094 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 7095 return LHS; 7096 7097 return QualType(); 7098 } 7099 case Type::ObjCObjectPointer: { 7100 if (OfBlockPointer) { 7101 if (canAssignObjCInterfacesInBlockPointer( 7102 LHS->getAs<ObjCObjectPointerType>(), 7103 RHS->getAs<ObjCObjectPointerType>(), 7104 BlockReturnType)) 7105 return LHS; 7106 return QualType(); 7107 } 7108 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 7109 RHS->getAs<ObjCObjectPointerType>())) 7110 return LHS; 7111 7112 return QualType(); 7113 } 7114 } 7115 7116 llvm_unreachable("Invalid Type::Class!"); 7117} 7118 7119bool ASTContext::FunctionTypesMatchOnNSConsumedAttrs( 7120 const FunctionProtoType *FromFunctionType, 7121 const FunctionProtoType *ToFunctionType) { 7122 if (FromFunctionType->hasAnyConsumedArgs() != 7123 ToFunctionType->hasAnyConsumedArgs()) 7124 return false; 7125 FunctionProtoType::ExtProtoInfo FromEPI = 7126 FromFunctionType->getExtProtoInfo(); 7127 FunctionProtoType::ExtProtoInfo ToEPI = 7128 ToFunctionType->getExtProtoInfo(); 7129 if (FromEPI.ConsumedArguments && ToEPI.ConsumedArguments) 7130 for (unsigned ArgIdx = 0, NumArgs = FromFunctionType->getNumArgs(); 7131 ArgIdx != NumArgs; ++ArgIdx) { 7132 if (FromEPI.ConsumedArguments[ArgIdx] != 7133 ToEPI.ConsumedArguments[ArgIdx]) 7134 return false; 7135 } 7136 return true; 7137} 7138 7139/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 7140/// 'RHS' attributes and returns the merged version; including for function 7141/// return types. 7142QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 7143 QualType LHSCan = getCanonicalType(LHS), 7144 RHSCan = getCanonicalType(RHS); 7145 // If two types are identical, they are compatible. 7146 if (LHSCan == RHSCan) 7147 return LHS; 7148 if (RHSCan->isFunctionType()) { 7149 if (!LHSCan->isFunctionType()) 7150 return QualType(); 7151 QualType OldReturnType = 7152 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 7153 QualType NewReturnType = 7154 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 7155 QualType ResReturnType = 7156 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 7157 if (ResReturnType.isNull()) 7158 return QualType(); 7159 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 7160 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 7161 // In either case, use OldReturnType to build the new function type. 7162 const FunctionType *F = LHS->getAs<FunctionType>(); 7163 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 7164 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 7165 EPI.ExtInfo = getFunctionExtInfo(LHS); 7166 QualType ResultType 7167 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 7168 FPT->getNumArgs(), EPI); 7169 return ResultType; 7170 } 7171 } 7172 return QualType(); 7173 } 7174 7175 // If the qualifiers are different, the types can still be merged. 7176 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 7177 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 7178 if (LQuals != RQuals) { 7179 // If any of these qualifiers are different, we have a type mismatch. 7180 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 7181 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 7182 return QualType(); 7183 7184 // Exactly one GC qualifier difference is allowed: __strong is 7185 // okay if the other type has no GC qualifier but is an Objective 7186 // C object pointer (i.e. implicitly strong by default). We fix 7187 // this by pretending that the unqualified type was actually 7188 // qualified __strong. 7189 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 7190 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 7191 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 7192 7193 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 7194 return QualType(); 7195 7196 if (GC_L == Qualifiers::Strong) 7197 return LHS; 7198 if (GC_R == Qualifiers::Strong) 7199 return RHS; 7200 return QualType(); 7201 } 7202 7203 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 7204 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 7205 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 7206 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 7207 if (ResQT == LHSBaseQT) 7208 return LHS; 7209 if (ResQT == RHSBaseQT) 7210 return RHS; 7211 } 7212 return QualType(); 7213} 7214 7215//===----------------------------------------------------------------------===// 7216// Integer Predicates 7217//===----------------------------------------------------------------------===// 7218 7219unsigned ASTContext::getIntWidth(QualType T) const { 7220 if (const EnumType *ET = dyn_cast<EnumType>(T)) 7221 T = ET->getDecl()->getIntegerType(); 7222 if (T->isBooleanType()) 7223 return 1; 7224 // For builtin types, just use the standard type sizing method 7225 return (unsigned)getTypeSize(T); 7226} 7227 7228QualType ASTContext::getCorrespondingUnsignedType(QualType T) const { 7229 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 7230 7231 // Turn <4 x signed int> -> <4 x unsigned int> 7232 if (const VectorType *VTy = T->getAs<VectorType>()) 7233 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 7234 VTy->getNumElements(), VTy->getVectorKind()); 7235 7236 // For enums, we return the unsigned version of the base type. 7237 if (const EnumType *ETy = T->getAs<EnumType>()) 7238 T = ETy->getDecl()->getIntegerType(); 7239 7240 const BuiltinType *BTy = T->getAs<BuiltinType>(); 7241 assert(BTy && "Unexpected signed integer type"); 7242 switch (BTy->getKind()) { 7243 case BuiltinType::Char_S: 7244 case BuiltinType::SChar: 7245 return UnsignedCharTy; 7246 case BuiltinType::Short: 7247 return UnsignedShortTy; 7248 case BuiltinType::Int: 7249 return UnsignedIntTy; 7250 case BuiltinType::Long: 7251 return UnsignedLongTy; 7252 case BuiltinType::LongLong: 7253 return UnsignedLongLongTy; 7254 case BuiltinType::Int128: 7255 return UnsignedInt128Ty; 7256 default: 7257 llvm_unreachable("Unexpected signed integer type"); 7258 } 7259} 7260 7261ASTMutationListener::~ASTMutationListener() { } 7262 7263 7264//===----------------------------------------------------------------------===// 7265// Builtin Type Computation 7266//===----------------------------------------------------------------------===// 7267 7268/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 7269/// pointer over the consumed characters. This returns the resultant type. If 7270/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 7271/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 7272/// a vector of "i*". 7273/// 7274/// RequiresICE is filled in on return to indicate whether the value is required 7275/// to be an Integer Constant Expression. 7276static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 7277 ASTContext::GetBuiltinTypeError &Error, 7278 bool &RequiresICE, 7279 bool AllowTypeModifiers) { 7280 // Modifiers. 7281 int HowLong = 0; 7282 bool Signed = false, Unsigned = false; 7283 RequiresICE = false; 7284 7285 // Read the prefixed modifiers first. 7286 bool Done = false; 7287 while (!Done) { 7288 switch (*Str++) { 7289 default: Done = true; --Str; break; 7290 case 'I': 7291 RequiresICE = true; 7292 break; 7293 case 'S': 7294 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 7295 assert(!Signed && "Can't use 'S' modifier multiple times!"); 7296 Signed = true; 7297 break; 7298 case 'U': 7299 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 7300 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 7301 Unsigned = true; 7302 break; 7303 case 'L': 7304 assert(HowLong <= 2 && "Can't have LLLL modifier"); 7305 ++HowLong; 7306 break; 7307 } 7308 } 7309 7310 QualType Type; 7311 7312 // Read the base type. 7313 switch (*Str++) { 7314 default: llvm_unreachable("Unknown builtin type letter!"); 7315 case 'v': 7316 assert(HowLong == 0 && !Signed && !Unsigned && 7317 "Bad modifiers used with 'v'!"); 7318 Type = Context.VoidTy; 7319 break; 7320 case 'f': 7321 assert(HowLong == 0 && !Signed && !Unsigned && 7322 "Bad modifiers used with 'f'!"); 7323 Type = Context.FloatTy; 7324 break; 7325 case 'd': 7326 assert(HowLong < 2 && !Signed && !Unsigned && 7327 "Bad modifiers used with 'd'!"); 7328 if (HowLong) 7329 Type = Context.LongDoubleTy; 7330 else 7331 Type = Context.DoubleTy; 7332 break; 7333 case 's': 7334 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 7335 if (Unsigned) 7336 Type = Context.UnsignedShortTy; 7337 else 7338 Type = Context.ShortTy; 7339 break; 7340 case 'i': 7341 if (HowLong == 3) 7342 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 7343 else if (HowLong == 2) 7344 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 7345 else if (HowLong == 1) 7346 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 7347 else 7348 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 7349 break; 7350 case 'c': 7351 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 7352 if (Signed) 7353 Type = Context.SignedCharTy; 7354 else if (Unsigned) 7355 Type = Context.UnsignedCharTy; 7356 else 7357 Type = Context.CharTy; 7358 break; 7359 case 'b': // boolean 7360 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 7361 Type = Context.BoolTy; 7362 break; 7363 case 'z': // size_t. 7364 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 7365 Type = Context.getSizeType(); 7366 break; 7367 case 'F': 7368 Type = Context.getCFConstantStringType(); 7369 break; 7370 case 'G': 7371 Type = Context.getObjCIdType(); 7372 break; 7373 case 'H': 7374 Type = Context.getObjCSelType(); 7375 break; 7376 case 'M': 7377 Type = Context.getObjCSuperType(); 7378 break; 7379 case 'a': 7380 Type = Context.getBuiltinVaListType(); 7381 assert(!Type.isNull() && "builtin va list type not initialized!"); 7382 break; 7383 case 'A': 7384 // This is a "reference" to a va_list; however, what exactly 7385 // this means depends on how va_list is defined. There are two 7386 // different kinds of va_list: ones passed by value, and ones 7387 // passed by reference. An example of a by-value va_list is 7388 // x86, where va_list is a char*. An example of by-ref va_list 7389 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 7390 // we want this argument to be a char*&; for x86-64, we want 7391 // it to be a __va_list_tag*. 7392 Type = Context.getBuiltinVaListType(); 7393 assert(!Type.isNull() && "builtin va list type not initialized!"); 7394 if (Type->isArrayType()) 7395 Type = Context.getArrayDecayedType(Type); 7396 else 7397 Type = Context.getLValueReferenceType(Type); 7398 break; 7399 case 'V': { 7400 char *End; 7401 unsigned NumElements = strtoul(Str, &End, 10); 7402 assert(End != Str && "Missing vector size"); 7403 Str = End; 7404 7405 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 7406 RequiresICE, false); 7407 assert(!RequiresICE && "Can't require vector ICE"); 7408 7409 // TODO: No way to make AltiVec vectors in builtins yet. 7410 Type = Context.getVectorType(ElementType, NumElements, 7411 VectorType::GenericVector); 7412 break; 7413 } 7414 case 'E': { 7415 char *End; 7416 7417 unsigned NumElements = strtoul(Str, &End, 10); 7418 assert(End != Str && "Missing vector size"); 7419 7420 Str = End; 7421 7422 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 7423 false); 7424 Type = Context.getExtVectorType(ElementType, NumElements); 7425 break; 7426 } 7427 case 'X': { 7428 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 7429 false); 7430 assert(!RequiresICE && "Can't require complex ICE"); 7431 Type = Context.getComplexType(ElementType); 7432 break; 7433 } 7434 case 'Y' : { 7435 Type = Context.getPointerDiffType(); 7436 break; 7437 } 7438 case 'P': 7439 Type = Context.getFILEType(); 7440 if (Type.isNull()) { 7441 Error = ASTContext::GE_Missing_stdio; 7442 return QualType(); 7443 } 7444 break; 7445 case 'J': 7446 if (Signed) 7447 Type = Context.getsigjmp_bufType(); 7448 else 7449 Type = Context.getjmp_bufType(); 7450 7451 if (Type.isNull()) { 7452 Error = ASTContext::GE_Missing_setjmp; 7453 return QualType(); 7454 } 7455 break; 7456 case 'K': 7457 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'K'!"); 7458 Type = Context.getucontext_tType(); 7459 7460 if (Type.isNull()) { 7461 Error = ASTContext::GE_Missing_ucontext; 7462 return QualType(); 7463 } 7464 break; 7465 case 'p': 7466 Type = Context.getProcessIDType(); 7467 break; 7468 } 7469 7470 // If there are modifiers and if we're allowed to parse them, go for it. 7471 Done = !AllowTypeModifiers; 7472 while (!Done) { 7473 switch (char c = *Str++) { 7474 default: Done = true; --Str; break; 7475 case '*': 7476 case '&': { 7477 // Both pointers and references can have their pointee types 7478 // qualified with an address space. 7479 char *End; 7480 unsigned AddrSpace = strtoul(Str, &End, 10); 7481 if (End != Str && AddrSpace != 0) { 7482 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 7483 Str = End; 7484 } 7485 if (c == '*') 7486 Type = Context.getPointerType(Type); 7487 else 7488 Type = Context.getLValueReferenceType(Type); 7489 break; 7490 } 7491 // FIXME: There's no way to have a built-in with an rvalue ref arg. 7492 case 'C': 7493 Type = Type.withConst(); 7494 break; 7495 case 'D': 7496 Type = Context.getVolatileType(Type); 7497 break; 7498 case 'R': 7499 Type = Type.withRestrict(); 7500 break; 7501 } 7502 } 7503 7504 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 7505 "Integer constant 'I' type must be an integer"); 7506 7507 return Type; 7508} 7509 7510/// GetBuiltinType - Return the type for the specified builtin. 7511QualType ASTContext::GetBuiltinType(unsigned Id, 7512 GetBuiltinTypeError &Error, 7513 unsigned *IntegerConstantArgs) const { 7514 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 7515 7516 SmallVector<QualType, 8> ArgTypes; 7517 7518 bool RequiresICE = false; 7519 Error = GE_None; 7520 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 7521 RequiresICE, true); 7522 if (Error != GE_None) 7523 return QualType(); 7524 7525 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 7526 7527 while (TypeStr[0] && TypeStr[0] != '.') { 7528 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 7529 if (Error != GE_None) 7530 return QualType(); 7531 7532 // If this argument is required to be an IntegerConstantExpression and the 7533 // caller cares, fill in the bitmask we return. 7534 if (RequiresICE && IntegerConstantArgs) 7535 *IntegerConstantArgs |= 1 << ArgTypes.size(); 7536 7537 // Do array -> pointer decay. The builtin should use the decayed type. 7538 if (Ty->isArrayType()) 7539 Ty = getArrayDecayedType(Ty); 7540 7541 ArgTypes.push_back(Ty); 7542 } 7543 7544 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 7545 "'.' should only occur at end of builtin type list!"); 7546 7547 FunctionType::ExtInfo EI; 7548 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 7549 7550 bool Variadic = (TypeStr[0] == '.'); 7551 7552 // We really shouldn't be making a no-proto type here, especially in C++. 7553 if (ArgTypes.empty() && Variadic) 7554 return getFunctionNoProtoType(ResType, EI); 7555 7556 FunctionProtoType::ExtProtoInfo EPI; 7557 EPI.ExtInfo = EI; 7558 EPI.Variadic = Variadic; 7559 7560 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 7561} 7562 7563GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 7564 GVALinkage External = GVA_StrongExternal; 7565 7566 Linkage L = FD->getLinkage(); 7567 switch (L) { 7568 case NoLinkage: 7569 case InternalLinkage: 7570 case UniqueExternalLinkage: 7571 return GVA_Internal; 7572 7573 case ExternalLinkage: 7574 switch (FD->getTemplateSpecializationKind()) { 7575 case TSK_Undeclared: 7576 case TSK_ExplicitSpecialization: 7577 External = GVA_StrongExternal; 7578 break; 7579 7580 case TSK_ExplicitInstantiationDefinition: 7581 return GVA_ExplicitTemplateInstantiation; 7582 7583 case TSK_ExplicitInstantiationDeclaration: 7584 case TSK_ImplicitInstantiation: 7585 External = GVA_TemplateInstantiation; 7586 break; 7587 } 7588 } 7589 7590 if (!FD->isInlined()) 7591 return External; 7592 7593 if (!getLangOpts().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 7594 // GNU or C99 inline semantics. Determine whether this symbol should be 7595 // externally visible. 7596 if (FD->isInlineDefinitionExternallyVisible()) 7597 return External; 7598 7599 // C99 inline semantics, where the symbol is not externally visible. 7600 return GVA_C99Inline; 7601 } 7602 7603 // C++0x [temp.explicit]p9: 7604 // [ Note: The intent is that an inline function that is the subject of 7605 // an explicit instantiation declaration will still be implicitly 7606 // instantiated when used so that the body can be considered for 7607 // inlining, but that no out-of-line copy of the inline function would be 7608 // generated in the translation unit. -- end note ] 7609 if (FD->getTemplateSpecializationKind() 7610 == TSK_ExplicitInstantiationDeclaration) 7611 return GVA_C99Inline; 7612 7613 return GVA_CXXInline; 7614} 7615 7616GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 7617 // If this is a static data member, compute the kind of template 7618 // specialization. Otherwise, this variable is not part of a 7619 // template. 7620 TemplateSpecializationKind TSK = TSK_Undeclared; 7621 if (VD->isStaticDataMember()) 7622 TSK = VD->getTemplateSpecializationKind(); 7623 7624 Linkage L = VD->getLinkage(); 7625 assert (!(L == ExternalLinkage && getLangOpts().CPlusPlus && 7626 VD->getType()->getLinkage() == UniqueExternalLinkage)); 7627 7628 switch (L) { 7629 case NoLinkage: 7630 case InternalLinkage: 7631 case UniqueExternalLinkage: 7632 return GVA_Internal; 7633 7634 case ExternalLinkage: 7635 switch (TSK) { 7636 case TSK_Undeclared: 7637 case TSK_ExplicitSpecialization: 7638 return GVA_StrongExternal; 7639 7640 case TSK_ExplicitInstantiationDeclaration: 7641 llvm_unreachable("Variable should not be instantiated"); 7642 // Fall through to treat this like any other instantiation. 7643 7644 case TSK_ExplicitInstantiationDefinition: 7645 return GVA_ExplicitTemplateInstantiation; 7646 7647 case TSK_ImplicitInstantiation: 7648 return GVA_TemplateInstantiation; 7649 } 7650 } 7651 7652 llvm_unreachable("Invalid Linkage!"); 7653} 7654 7655bool ASTContext::DeclMustBeEmitted(const Decl *D) { 7656 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 7657 if (!VD->isFileVarDecl()) 7658 return false; 7659 } else if (!isa<FunctionDecl>(D)) 7660 return false; 7661 7662 // Weak references don't produce any output by themselves. 7663 if (D->hasAttr<WeakRefAttr>()) 7664 return false; 7665 7666 // Aliases and used decls are required. 7667 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 7668 return true; 7669 7670 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 7671 // Forward declarations aren't required. 7672 if (!FD->doesThisDeclarationHaveABody()) 7673 return FD->doesDeclarationForceExternallyVisibleDefinition(); 7674 7675 // Constructors and destructors are required. 7676 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 7677 return true; 7678 7679 // The key function for a class is required. This rule only comes 7680 // into play when inline functions can be key functions, though. 7681 if (getTargetInfo().getCXXABI().canKeyFunctionBeInline()) { 7682 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 7683 const CXXRecordDecl *RD = MD->getParent(); 7684 if (MD->isOutOfLine() && RD->isDynamicClass()) { 7685 const CXXMethodDecl *KeyFunc = getCurrentKeyFunction(RD); 7686 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 7687 return true; 7688 } 7689 } 7690 } 7691 7692 GVALinkage Linkage = GetGVALinkageForFunction(FD); 7693 7694 // static, static inline, always_inline, and extern inline functions can 7695 // always be deferred. Normal inline functions can be deferred in C99/C++. 7696 // Implicit template instantiations can also be deferred in C++. 7697 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 7698 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 7699 return false; 7700 return true; 7701 } 7702 7703 const VarDecl *VD = cast<VarDecl>(D); 7704 assert(VD->isFileVarDecl() && "Expected file scoped var"); 7705 7706 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 7707 return false; 7708 7709 // Variables that can be needed in other TUs are required. 7710 GVALinkage L = GetGVALinkageForVariable(VD); 7711 if (L != GVA_Internal && L != GVA_TemplateInstantiation) 7712 return true; 7713 7714 // Variables that have destruction with side-effects are required. 7715 if (VD->getType().isDestructedType()) 7716 return true; 7717 7718 // Variables that have initialization with side-effects are required. 7719 if (VD->getInit() && VD->getInit()->HasSideEffects(*this)) 7720 return true; 7721 7722 return false; 7723} 7724 7725CallingConv ASTContext::getDefaultCXXMethodCallConv(bool isVariadic) { 7726 // Pass through to the C++ ABI object 7727 return ABI->getDefaultMethodCallConv(isVariadic); 7728} 7729 7730CallingConv ASTContext::getCanonicalCallConv(CallingConv CC) const { 7731 if (CC == CC_C && !LangOpts.MRTD && 7732 getTargetInfo().getCXXABI().isMemberFunctionCCDefault()) 7733 return CC_Default; 7734 return CC; 7735} 7736 7737bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 7738 // Pass through to the C++ ABI object 7739 return ABI->isNearlyEmpty(RD); 7740} 7741 7742MangleContext *ASTContext::createMangleContext() { 7743 switch (Target->getCXXABI().getKind()) { 7744 case TargetCXXABI::GenericAArch64: 7745 case TargetCXXABI::GenericItanium: 7746 case TargetCXXABI::GenericARM: 7747 case TargetCXXABI::iOS: 7748 return createItaniumMangleContext(*this, getDiagnostics()); 7749 case TargetCXXABI::Microsoft: 7750 return createMicrosoftMangleContext(*this, getDiagnostics()); 7751 } 7752 llvm_unreachable("Unsupported ABI"); 7753} 7754 7755CXXABI::~CXXABI() {} 7756 7757size_t ASTContext::getSideTableAllocatedMemory() const { 7758 return ASTRecordLayouts.getMemorySize() 7759 + llvm::capacity_in_bytes(ObjCLayouts) 7760 + llvm::capacity_in_bytes(KeyFunctions) 7761 + llvm::capacity_in_bytes(ObjCImpls) 7762 + llvm::capacity_in_bytes(BlockVarCopyInits) 7763 + llvm::capacity_in_bytes(DeclAttrs) 7764 + llvm::capacity_in_bytes(InstantiatedFromStaticDataMember) 7765 + llvm::capacity_in_bytes(InstantiatedFromUsingDecl) 7766 + llvm::capacity_in_bytes(InstantiatedFromUsingShadowDecl) 7767 + llvm::capacity_in_bytes(InstantiatedFromUnnamedFieldDecl) 7768 + llvm::capacity_in_bytes(OverriddenMethods) 7769 + llvm::capacity_in_bytes(Types) 7770 + llvm::capacity_in_bytes(VariableArrayTypes) 7771 + llvm::capacity_in_bytes(ClassScopeSpecializationPattern); 7772} 7773 7774void ASTContext::addUnnamedTag(const TagDecl *Tag) { 7775 // FIXME: This mangling should be applied to function local classes too 7776 if (!Tag->getName().empty() || Tag->getTypedefNameForAnonDecl() || 7777 !isa<CXXRecordDecl>(Tag->getParent()) || Tag->getLinkage() != ExternalLinkage) 7778 return; 7779 7780 std::pair<llvm::DenseMap<const DeclContext *, unsigned>::iterator, bool> P = 7781 UnnamedMangleContexts.insert(std::make_pair(Tag->getParent(), 0)); 7782 UnnamedMangleNumbers.insert(std::make_pair(Tag, P.first->second++)); 7783} 7784 7785int ASTContext::getUnnamedTagManglingNumber(const TagDecl *Tag) const { 7786 llvm::DenseMap<const TagDecl *, unsigned>::const_iterator I = 7787 UnnamedMangleNumbers.find(Tag); 7788 return I != UnnamedMangleNumbers.end() ? I->second : -1; 7789} 7790 7791unsigned ASTContext::getLambdaManglingNumber(CXXMethodDecl *CallOperator) { 7792 CXXRecordDecl *Lambda = CallOperator->getParent(); 7793 return LambdaMangleContexts[Lambda->getDeclContext()] 7794 .getManglingNumber(CallOperator); 7795} 7796 7797 7798void ASTContext::setParameterIndex(const ParmVarDecl *D, unsigned int index) { 7799 ParamIndices[D] = index; 7800} 7801 7802unsigned ASTContext::getParameterIndex(const ParmVarDecl *D) const { 7803 ParameterIndexTable::const_iterator I = ParamIndices.find(D); 7804 assert(I != ParamIndices.end() && 7805 "ParmIndices lacks entry set by ParmVarDecl"); 7806 return I->second; 7807} 7808