ASTContext.cpp revision 2455636163fdd18581d7fdae816433f886d88213
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 "clang/AST/DeclCXX.h" 16#include "clang/AST/DeclObjC.h" 17#include "clang/AST/DeclTemplate.h" 18#include "clang/AST/Expr.h" 19#include "clang/AST/ExternalASTSource.h" 20#include "clang/AST/RecordLayout.h" 21#include "clang/Basic/Builtins.h" 22#include "clang/Basic/SourceManager.h" 23#include "clang/Basic/TargetInfo.h" 24#include "llvm/ADT/StringExtras.h" 25#include "llvm/Support/MathExtras.h" 26#include "llvm/Support/MemoryBuffer.h" 27#include "RecordLayoutBuilder.h" 28 29using namespace clang; 30 31enum FloatingRank { 32 FloatRank, DoubleRank, LongDoubleRank 33}; 34 35ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 36 TargetInfo &t, 37 IdentifierTable &idents, SelectorTable &sels, 38 Builtin::Context &builtins, 39 bool FreeMem, unsigned size_reserve) : 40 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 41 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), 42 SourceMgr(SM), LangOpts(LOpts), 43 LoadedExternalComments(false), FreeMemory(FreeMem), Target(t), 44 Idents(idents), Selectors(sels), 45 BuiltinInfo(builtins), ExternalSource(0), PrintingPolicy(LOpts) { 46 if (size_reserve > 0) Types.reserve(size_reserve); 47 TUDecl = TranslationUnitDecl::Create(*this); 48 InitBuiltinTypes(); 49} 50 51ASTContext::~ASTContext() { 52 // Deallocate all the types. 53 while (!Types.empty()) { 54 Types.back()->Destroy(*this); 55 Types.pop_back(); 56 } 57 58 { 59 llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 60 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); 61 while (I != E) { 62 ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 63 delete R; 64 } 65 } 66 67 { 68 llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*>::iterator 69 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); 70 while (I != E) { 71 ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 72 delete R; 73 } 74 } 75 76 // Destroy nested-name-specifiers. 77 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 78 NNS = NestedNameSpecifiers.begin(), 79 NNSEnd = NestedNameSpecifiers.end(); 80 NNS != NNSEnd; 81 /* Increment in loop */) 82 (*NNS++).Destroy(*this); 83 84 if (GlobalNestedNameSpecifier) 85 GlobalNestedNameSpecifier->Destroy(*this); 86 87 TUDecl->Destroy(*this); 88} 89 90void 91ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 92 ExternalSource.reset(Source.take()); 93} 94 95void ASTContext::PrintStats() const { 96 fprintf(stderr, "*** AST Context Stats:\n"); 97 fprintf(stderr, " %d types total.\n", (int)Types.size()); 98 99 unsigned counts[] = { 100#define TYPE(Name, Parent) 0, 101#define ABSTRACT_TYPE(Name, Parent) 102#include "clang/AST/TypeNodes.def" 103 0 // Extra 104 }; 105 106 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 107 Type *T = Types[i]; 108 counts[(unsigned)T->getTypeClass()]++; 109 } 110 111 unsigned Idx = 0; 112 unsigned TotalBytes = 0; 113#define TYPE(Name, Parent) \ 114 if (counts[Idx]) \ 115 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 116 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 117 ++Idx; 118#define ABSTRACT_TYPE(Name, Parent) 119#include "clang/AST/TypeNodes.def" 120 121 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 122 123 if (ExternalSource.get()) { 124 fprintf(stderr, "\n"); 125 ExternalSource->PrintStats(); 126 } 127} 128 129 130void ASTContext::InitBuiltinType(QualType &R, BuiltinType::Kind K) { 131 Types.push_back((R = QualType(new (*this,8) BuiltinType(K),0)).getTypePtr()); 132} 133 134void ASTContext::InitBuiltinTypes() { 135 assert(VoidTy.isNull() && "Context reinitialized?"); 136 137 // C99 6.2.5p19. 138 InitBuiltinType(VoidTy, BuiltinType::Void); 139 140 // C99 6.2.5p2. 141 InitBuiltinType(BoolTy, BuiltinType::Bool); 142 // C99 6.2.5p3. 143 if (LangOpts.CharIsSigned) 144 InitBuiltinType(CharTy, BuiltinType::Char_S); 145 else 146 InitBuiltinType(CharTy, BuiltinType::Char_U); 147 // C99 6.2.5p4. 148 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 149 InitBuiltinType(ShortTy, BuiltinType::Short); 150 InitBuiltinType(IntTy, BuiltinType::Int); 151 InitBuiltinType(LongTy, BuiltinType::Long); 152 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 153 154 // C99 6.2.5p6. 155 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 156 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 157 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 158 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 159 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 160 161 // C99 6.2.5p10. 162 InitBuiltinType(FloatTy, BuiltinType::Float); 163 InitBuiltinType(DoubleTy, BuiltinType::Double); 164 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 165 166 // GNU extension, 128-bit integers. 167 InitBuiltinType(Int128Ty, BuiltinType::Int128); 168 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 169 170 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 171 InitBuiltinType(WCharTy, BuiltinType::WChar); 172 else // C99 173 WCharTy = getFromTargetType(Target.getWCharType()); 174 175 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 176 InitBuiltinType(Char16Ty, BuiltinType::Char16); 177 else // C99 178 Char16Ty = getFromTargetType(Target.getChar16Type()); 179 180 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 181 InitBuiltinType(Char32Ty, BuiltinType::Char32); 182 else // C99 183 Char32Ty = getFromTargetType(Target.getChar32Type()); 184 185 // Placeholder type for functions. 186 InitBuiltinType(OverloadTy, BuiltinType::Overload); 187 188 // Placeholder type for type-dependent expressions whose type is 189 // completely unknown. No code should ever check a type against 190 // DependentTy and users should never see it; however, it is here to 191 // help diagnose failures to properly check for type-dependent 192 // expressions. 193 InitBuiltinType(DependentTy, BuiltinType::Dependent); 194 195 // Placeholder type for C++0x auto declarations whose real type has 196 // not yet been deduced. 197 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 198 199 // C99 6.2.5p11. 200 FloatComplexTy = getComplexType(FloatTy); 201 DoubleComplexTy = getComplexType(DoubleTy); 202 LongDoubleComplexTy = getComplexType(LongDoubleTy); 203 204 BuiltinVaListType = QualType(); 205 206 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 207 ObjCIdTypedefType = QualType(); 208 ObjCClassTypedefType = QualType(); 209 210 // Builtin types for 'id' and 'Class'. 211 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 212 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 213 214 ObjCConstantStringType = QualType(); 215 216 // void * type 217 VoidPtrTy = getPointerType(VoidTy); 218 219 // nullptr type (C++0x 2.14.7) 220 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 221} 222 223VarDecl *ASTContext::getInstantiatedFromStaticDataMember(VarDecl *Var) { 224 assert(Var->isStaticDataMember() && "Not a static data member"); 225 llvm::DenseMap<VarDecl *, VarDecl *>::iterator Pos 226 = InstantiatedFromStaticDataMember.find(Var); 227 if (Pos == InstantiatedFromStaticDataMember.end()) 228 return 0; 229 230 return Pos->second; 231} 232 233void 234ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl) { 235 assert(Inst->isStaticDataMember() && "Not a static data member"); 236 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 237 assert(!InstantiatedFromStaticDataMember[Inst] && 238 "Already noted what static data member was instantiated from"); 239 InstantiatedFromStaticDataMember[Inst] = Tmpl; 240} 241 242namespace { 243 class BeforeInTranslationUnit 244 : std::binary_function<SourceRange, SourceRange, bool> { 245 SourceManager *SourceMgr; 246 247 public: 248 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 249 250 bool operator()(SourceRange X, SourceRange Y) { 251 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 252 } 253 }; 254} 255 256/// \brief Determine whether the given comment is a Doxygen-style comment. 257/// 258/// \param Start the start of the comment text. 259/// 260/// \param End the end of the comment text. 261/// 262/// \param Member whether we want to check whether this is a member comment 263/// (which requires a < after the Doxygen-comment delimiter). Otherwise, 264/// we only return true when we find a non-member comment. 265static bool 266isDoxygenComment(SourceManager &SourceMgr, SourceRange Comment, 267 bool Member = false) { 268 const char *BufferStart 269 = SourceMgr.getBufferData(SourceMgr.getFileID(Comment.getBegin())).first; 270 const char *Start = BufferStart + SourceMgr.getFileOffset(Comment.getBegin()); 271 const char* End = BufferStart + SourceMgr.getFileOffset(Comment.getEnd()); 272 273 if (End - Start < 4) 274 return false; 275 276 assert(Start[0] == '/' && "Not a comment?"); 277 if (Start[1] == '*' && !(Start[2] == '!' || Start[2] == '*')) 278 return false; 279 if (Start[1] == '/' && !(Start[2] == '!' || Start[2] == '/')) 280 return false; 281 282 return (Start[3] == '<') == Member; 283} 284 285/// \brief Retrieve the comment associated with the given declaration, if 286/// it has one. 287const char *ASTContext::getCommentForDecl(const Decl *D) { 288 if (!D) 289 return 0; 290 291 // Check whether we have cached a comment string for this declaration 292 // already. 293 llvm::DenseMap<const Decl *, std::string>::iterator Pos 294 = DeclComments.find(D); 295 if (Pos != DeclComments.end()) 296 return Pos->second.c_str(); 297 298 // If we have an external AST source and have not yet loaded comments from 299 // that source, do so now. 300 if (ExternalSource && !LoadedExternalComments) { 301 std::vector<SourceRange> LoadedComments; 302 ExternalSource->ReadComments(LoadedComments); 303 304 if (!LoadedComments.empty()) 305 Comments.insert(Comments.begin(), LoadedComments.begin(), 306 LoadedComments.end()); 307 308 LoadedExternalComments = true; 309 } 310 311 // If there are no comments anywhere, we won't find anything. 312 if (Comments.empty()) 313 return 0; 314 315 // If the declaration doesn't map directly to a location in a file, we 316 // can't find the comment. 317 SourceLocation DeclStartLoc = D->getLocStart(); 318 if (DeclStartLoc.isInvalid() || !DeclStartLoc.isFileID()) 319 return 0; 320 321 // Find the comment that occurs just before this declaration. 322 std::vector<SourceRange>::iterator LastComment 323 = std::lower_bound(Comments.begin(), Comments.end(), 324 SourceRange(DeclStartLoc), 325 BeforeInTranslationUnit(&SourceMgr)); 326 327 // Decompose the location for the start of the declaration and find the 328 // beginning of the file buffer. 329 std::pair<FileID, unsigned> DeclStartDecomp 330 = SourceMgr.getDecomposedLoc(DeclStartLoc); 331 const char *FileBufferStart 332 = SourceMgr.getBufferData(DeclStartDecomp.first).first; 333 334 // First check whether we have a comment for a member. 335 if (LastComment != Comments.end() && 336 !isa<TagDecl>(D) && !isa<NamespaceDecl>(D) && 337 isDoxygenComment(SourceMgr, *LastComment, true)) { 338 std::pair<FileID, unsigned> LastCommentEndDecomp 339 = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 340 if (DeclStartDecomp.first == LastCommentEndDecomp.first && 341 SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second) 342 == SourceMgr.getLineNumber(LastCommentEndDecomp.first, 343 LastCommentEndDecomp.second)) { 344 // The Doxygen member comment comes after the declaration starts and 345 // is on the same line and in the same file as the declaration. This 346 // is the comment we want. 347 std::string &Result = DeclComments[D]; 348 Result.append(FileBufferStart + 349 SourceMgr.getFileOffset(LastComment->getBegin()), 350 FileBufferStart + LastCommentEndDecomp.second + 1); 351 return Result.c_str(); 352 } 353 } 354 355 if (LastComment == Comments.begin()) 356 return 0; 357 --LastComment; 358 359 // Decompose the end of the comment. 360 std::pair<FileID, unsigned> LastCommentEndDecomp 361 = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 362 363 // If the comment and the declaration aren't in the same file, then they 364 // aren't related. 365 if (DeclStartDecomp.first != LastCommentEndDecomp.first) 366 return 0; 367 368 // Check that we actually have a Doxygen comment. 369 if (!isDoxygenComment(SourceMgr, *LastComment)) 370 return 0; 371 372 // Compute the starting line for the declaration and for the end of the 373 // comment (this is expensive). 374 unsigned DeclStartLine 375 = SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second); 376 unsigned CommentEndLine 377 = SourceMgr.getLineNumber(LastCommentEndDecomp.first, 378 LastCommentEndDecomp.second); 379 380 // If the comment does not end on the line prior to the declaration, then 381 // the comment is not associated with the declaration at all. 382 if (CommentEndLine + 1 != DeclStartLine) 383 return 0; 384 385 // We have a comment, but there may be more comments on the previous lines. 386 // Keep looking so long as the comments are still Doxygen comments and are 387 // still adjacent. 388 unsigned ExpectedLine 389 = SourceMgr.getSpellingLineNumber(LastComment->getBegin()) - 1; 390 std::vector<SourceRange>::iterator FirstComment = LastComment; 391 while (FirstComment != Comments.begin()) { 392 // Look at the previous comment 393 --FirstComment; 394 std::pair<FileID, unsigned> Decomp 395 = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 396 397 // If this previous comment is in a different file, we're done. 398 if (Decomp.first != DeclStartDecomp.first) { 399 ++FirstComment; 400 break; 401 } 402 403 // If this comment is not a Doxygen comment, we're done. 404 if (!isDoxygenComment(SourceMgr, *FirstComment)) { 405 ++FirstComment; 406 break; 407 } 408 409 // If the line number is not what we expected, we're done. 410 unsigned Line = SourceMgr.getLineNumber(Decomp.first, Decomp.second); 411 if (Line != ExpectedLine) { 412 ++FirstComment; 413 break; 414 } 415 416 // Set the next expected line number. 417 ExpectedLine 418 = SourceMgr.getSpellingLineNumber(FirstComment->getBegin()) - 1; 419 } 420 421 // The iterator range [FirstComment, LastComment] contains all of the 422 // BCPL comments that, together, are associated with this declaration. 423 // Form a single comment block string for this declaration that concatenates 424 // all of these comments. 425 std::string &Result = DeclComments[D]; 426 while (FirstComment != LastComment) { 427 std::pair<FileID, unsigned> DecompStart 428 = SourceMgr.getDecomposedLoc(FirstComment->getBegin()); 429 std::pair<FileID, unsigned> DecompEnd 430 = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 431 Result.append(FileBufferStart + DecompStart.second, 432 FileBufferStart + DecompEnd.second + 1); 433 ++FirstComment; 434 } 435 436 // Append the last comment line. 437 Result.append(FileBufferStart + 438 SourceMgr.getFileOffset(LastComment->getBegin()), 439 FileBufferStart + LastCommentEndDecomp.second + 1); 440 return Result.c_str(); 441} 442 443//===----------------------------------------------------------------------===// 444// Type Sizing and Analysis 445//===----------------------------------------------------------------------===// 446 447/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 448/// scalar floating point type. 449const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 450 const BuiltinType *BT = T->getAsBuiltinType(); 451 assert(BT && "Not a floating point type!"); 452 switch (BT->getKind()) { 453 default: assert(0 && "Not a floating point type!"); 454 case BuiltinType::Float: return Target.getFloatFormat(); 455 case BuiltinType::Double: return Target.getDoubleFormat(); 456 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 457 } 458} 459 460/// getDeclAlign - Return a conservative estimate of the alignment of the 461/// specified decl. Note that bitfields do not have a valid alignment, so 462/// this method will assert on them. 463unsigned ASTContext::getDeclAlignInBytes(const Decl *D) { 464 unsigned Align = Target.getCharWidth(); 465 466 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 467 Align = std::max(Align, AA->getAlignment()); 468 469 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 470 QualType T = VD->getType(); 471 if (const ReferenceType* RT = T->getAsReferenceType()) { 472 unsigned AS = RT->getPointeeType().getAddressSpace(); 473 Align = Target.getPointerAlign(AS); 474 } else if (!T->isIncompleteType() && !T->isFunctionType()) { 475 // Incomplete or function types default to 1. 476 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 477 T = cast<ArrayType>(T)->getElementType(); 478 479 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 480 } 481 } 482 483 return Align / Target.getCharWidth(); 484} 485 486/// getTypeSize - Return the size of the specified type, in bits. This method 487/// does not work on incomplete types. 488std::pair<uint64_t, unsigned> 489ASTContext::getTypeInfo(const Type *T) { 490 uint64_t Width=0; 491 unsigned Align=8; 492 switch (T->getTypeClass()) { 493#define TYPE(Class, Base) 494#define ABSTRACT_TYPE(Class, Base) 495#define NON_CANONICAL_TYPE(Class, Base) 496#define DEPENDENT_TYPE(Class, Base) case Type::Class: 497#include "clang/AST/TypeNodes.def" 498 assert(false && "Should not see dependent types"); 499 break; 500 501 case Type::FunctionNoProto: 502 case Type::FunctionProto: 503 // GCC extension: alignof(function) = 32 bits 504 Width = 0; 505 Align = 32; 506 break; 507 508 case Type::IncompleteArray: 509 case Type::VariableArray: 510 Width = 0; 511 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 512 break; 513 514 case Type::ConstantArrayWithExpr: 515 case Type::ConstantArrayWithoutExpr: 516 case Type::ConstantArray: { 517 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 518 519 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 520 Width = EltInfo.first*CAT->getSize().getZExtValue(); 521 Align = EltInfo.second; 522 break; 523 } 524 case Type::ExtVector: 525 case Type::Vector: { 526 std::pair<uint64_t, unsigned> EltInfo = 527 getTypeInfo(cast<VectorType>(T)->getElementType()); 528 Width = EltInfo.first*cast<VectorType>(T)->getNumElements(); 529 Align = Width; 530 // If the alignment is not a power of 2, round up to the next power of 2. 531 // This happens for non-power-of-2 length vectors. 532 // FIXME: this should probably be a target property. 533 Align = 1 << llvm::Log2_32_Ceil(Align); 534 break; 535 } 536 537 case Type::Builtin: 538 switch (cast<BuiltinType>(T)->getKind()) { 539 default: assert(0 && "Unknown builtin type!"); 540 case BuiltinType::Void: 541 // GCC extension: alignof(void) = 8 bits. 542 Width = 0; 543 Align = 8; 544 break; 545 546 case BuiltinType::Bool: 547 Width = Target.getBoolWidth(); 548 Align = Target.getBoolAlign(); 549 break; 550 case BuiltinType::Char_S: 551 case BuiltinType::Char_U: 552 case BuiltinType::UChar: 553 case BuiltinType::SChar: 554 Width = Target.getCharWidth(); 555 Align = Target.getCharAlign(); 556 break; 557 case BuiltinType::WChar: 558 Width = Target.getWCharWidth(); 559 Align = Target.getWCharAlign(); 560 break; 561 case BuiltinType::Char16: 562 Width = Target.getChar16Width(); 563 Align = Target.getChar16Align(); 564 break; 565 case BuiltinType::Char32: 566 Width = Target.getChar32Width(); 567 Align = Target.getChar32Align(); 568 break; 569 case BuiltinType::UShort: 570 case BuiltinType::Short: 571 Width = Target.getShortWidth(); 572 Align = Target.getShortAlign(); 573 break; 574 case BuiltinType::UInt: 575 case BuiltinType::Int: 576 Width = Target.getIntWidth(); 577 Align = Target.getIntAlign(); 578 break; 579 case BuiltinType::ULong: 580 case BuiltinType::Long: 581 Width = Target.getLongWidth(); 582 Align = Target.getLongAlign(); 583 break; 584 case BuiltinType::ULongLong: 585 case BuiltinType::LongLong: 586 Width = Target.getLongLongWidth(); 587 Align = Target.getLongLongAlign(); 588 break; 589 case BuiltinType::Int128: 590 case BuiltinType::UInt128: 591 Width = 128; 592 Align = 128; // int128_t is 128-bit aligned on all targets. 593 break; 594 case BuiltinType::Float: 595 Width = Target.getFloatWidth(); 596 Align = Target.getFloatAlign(); 597 break; 598 case BuiltinType::Double: 599 Width = Target.getDoubleWidth(); 600 Align = Target.getDoubleAlign(); 601 break; 602 case BuiltinType::LongDouble: 603 Width = Target.getLongDoubleWidth(); 604 Align = Target.getLongDoubleAlign(); 605 break; 606 case BuiltinType::NullPtr: 607 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 608 Align = Target.getPointerAlign(0); // == sizeof(void*) 609 break; 610 } 611 break; 612 case Type::FixedWidthInt: 613 // FIXME: This isn't precisely correct; the width/alignment should depend 614 // on the available types for the target 615 Width = cast<FixedWidthIntType>(T)->getWidth(); 616 Width = std::max(llvm::NextPowerOf2(Width - 1), (uint64_t)8); 617 Align = Width; 618 break; 619 case Type::ExtQual: 620 // FIXME: Pointers into different addr spaces could have different sizes and 621 // alignment requirements: getPointerInfo should take an AddrSpace. 622 return getTypeInfo(QualType(cast<ExtQualType>(T)->getBaseType(), 0)); 623 case Type::ObjCObjectPointer: 624 Width = Target.getPointerWidth(0); 625 Align = Target.getPointerAlign(0); 626 break; 627 case Type::BlockPointer: { 628 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 629 Width = Target.getPointerWidth(AS); 630 Align = Target.getPointerAlign(AS); 631 break; 632 } 633 case Type::Pointer: { 634 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 635 Width = Target.getPointerWidth(AS); 636 Align = Target.getPointerAlign(AS); 637 break; 638 } 639 case Type::LValueReference: 640 case Type::RValueReference: 641 // "When applied to a reference or a reference type, the result is the size 642 // of the referenced type." C++98 5.3.3p2: expr.sizeof. 643 // FIXME: This is wrong for struct layout: a reference in a struct has 644 // pointer size. 645 return getTypeInfo(cast<ReferenceType>(T)->getPointeeType()); 646 case Type::MemberPointer: { 647 // FIXME: This is ABI dependent. We use the Itanium C++ ABI. 648 // http://www.codesourcery.com/public/cxx-abi/abi.html#member-pointers 649 // If we ever want to support other ABIs this needs to be abstracted. 650 651 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 652 std::pair<uint64_t, unsigned> PtrDiffInfo = 653 getTypeInfo(getPointerDiffType()); 654 Width = PtrDiffInfo.first; 655 if (Pointee->isFunctionType()) 656 Width *= 2; 657 Align = PtrDiffInfo.second; 658 break; 659 } 660 case Type::Complex: { 661 // Complex types have the same alignment as their elements, but twice the 662 // size. 663 std::pair<uint64_t, unsigned> EltInfo = 664 getTypeInfo(cast<ComplexType>(T)->getElementType()); 665 Width = EltInfo.first*2; 666 Align = EltInfo.second; 667 break; 668 } 669 case Type::ObjCInterface: { 670 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 671 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 672 Width = Layout.getSize(); 673 Align = Layout.getAlignment(); 674 break; 675 } 676 case Type::Record: 677 case Type::Enum: { 678 const TagType *TT = cast<TagType>(T); 679 680 if (TT->getDecl()->isInvalidDecl()) { 681 Width = 1; 682 Align = 1; 683 break; 684 } 685 686 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 687 return getTypeInfo(ET->getDecl()->getIntegerType()); 688 689 const RecordType *RT = cast<RecordType>(TT); 690 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 691 Width = Layout.getSize(); 692 Align = Layout.getAlignment(); 693 break; 694 } 695 696 case Type::Typedef: { 697 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 698 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 699 Align = Aligned->getAlignment(); 700 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 701 } else 702 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 703 break; 704 } 705 706 case Type::TypeOfExpr: 707 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 708 .getTypePtr()); 709 710 case Type::TypeOf: 711 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 712 713 case Type::Decltype: 714 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 715 .getTypePtr()); 716 717 case Type::QualifiedName: 718 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 719 720 case Type::TemplateSpecialization: 721 assert(getCanonicalType(T) != T && 722 "Cannot request the size of a dependent type"); 723 // FIXME: this is likely to be wrong once we support template 724 // aliases, since a template alias could refer to a typedef that 725 // has an __aligned__ attribute on it. 726 return getTypeInfo(getCanonicalType(T)); 727 } 728 729 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 730 return std::make_pair(Width, Align); 731} 732 733/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 734/// type for the current target in bits. This can be different than the ABI 735/// alignment in cases where it is beneficial for performance to overalign 736/// a data type. 737unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 738 unsigned ABIAlign = getTypeAlign(T); 739 740 // Double and long long should be naturally aligned if possible. 741 if (const ComplexType* CT = T->getAsComplexType()) 742 T = CT->getElementType().getTypePtr(); 743 if (T->isSpecificBuiltinType(BuiltinType::Double) || 744 T->isSpecificBuiltinType(BuiltinType::LongLong)) 745 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 746 747 return ABIAlign; 748} 749 750static void CollectLocalObjCIvars(ASTContext *Ctx, 751 const ObjCInterfaceDecl *OI, 752 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 753 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 754 E = OI->ivar_end(); I != E; ++I) { 755 ObjCIvarDecl *IVDecl = *I; 756 if (!IVDecl->isInvalidDecl()) 757 Fields.push_back(cast<FieldDecl>(IVDecl)); 758 } 759} 760 761void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 762 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 763 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 764 CollectObjCIvars(SuperClass, Fields); 765 CollectLocalObjCIvars(this, OI, Fields); 766} 767 768/// ShallowCollectObjCIvars - 769/// Collect all ivars, including those synthesized, in the current class. 770/// 771void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 772 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars, 773 bool CollectSynthesized) { 774 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 775 E = OI->ivar_end(); I != E; ++I) { 776 Ivars.push_back(*I); 777 } 778 if (CollectSynthesized) 779 CollectSynthesizedIvars(OI, Ivars); 780} 781 782void ASTContext::CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 783 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 784 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 785 E = PD->prop_end(); I != E; ++I) 786 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 787 Ivars.push_back(Ivar); 788 789 // Also look into nested protocols. 790 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 791 E = PD->protocol_end(); P != E; ++P) 792 CollectProtocolSynthesizedIvars(*P, Ivars); 793} 794 795/// CollectSynthesizedIvars - 796/// This routine collect synthesized ivars for the designated class. 797/// 798void ASTContext::CollectSynthesizedIvars(const ObjCInterfaceDecl *OI, 799 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 800 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 801 E = OI->prop_end(); I != E; ++I) { 802 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 803 Ivars.push_back(Ivar); 804 } 805 // Also look into interface's protocol list for properties declared 806 // in the protocol and whose ivars are synthesized. 807 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 808 PE = OI->protocol_end(); P != PE; ++P) { 809 ObjCProtocolDecl *PD = (*P); 810 CollectProtocolSynthesizedIvars(PD, Ivars); 811 } 812} 813 814unsigned ASTContext::CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD) { 815 unsigned count = 0; 816 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 817 E = PD->prop_end(); I != E; ++I) 818 if ((*I)->getPropertyIvarDecl()) 819 ++count; 820 821 // Also look into nested protocols. 822 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 823 E = PD->protocol_end(); P != E; ++P) 824 count += CountProtocolSynthesizedIvars(*P); 825 return count; 826} 827 828unsigned ASTContext::CountSynthesizedIvars(const ObjCInterfaceDecl *OI) 829{ 830 unsigned count = 0; 831 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 832 E = OI->prop_end(); I != E; ++I) { 833 if ((*I)->getPropertyIvarDecl()) 834 ++count; 835 } 836 // Also look into interface's protocol list for properties declared 837 // in the protocol and whose ivars are synthesized. 838 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 839 PE = OI->protocol_end(); P != PE; ++P) { 840 ObjCProtocolDecl *PD = (*P); 841 count += CountProtocolSynthesizedIvars(PD); 842 } 843 return count; 844} 845 846/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 847ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 848 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 849 I = ObjCImpls.find(D); 850 if (I != ObjCImpls.end()) 851 return cast<ObjCImplementationDecl>(I->second); 852 return 0; 853} 854/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 855ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 856 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 857 I = ObjCImpls.find(D); 858 if (I != ObjCImpls.end()) 859 return cast<ObjCCategoryImplDecl>(I->second); 860 return 0; 861} 862 863/// \brief Set the implementation of ObjCInterfaceDecl. 864void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 865 ObjCImplementationDecl *ImplD) { 866 assert(IFaceD && ImplD && "Passed null params"); 867 ObjCImpls[IFaceD] = ImplD; 868} 869/// \brief Set the implementation of ObjCCategoryDecl. 870void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 871 ObjCCategoryImplDecl *ImplD) { 872 assert(CatD && ImplD && "Passed null params"); 873 ObjCImpls[CatD] = ImplD; 874} 875 876/// getInterfaceLayoutImpl - Get or compute information about the 877/// layout of the given interface. 878/// 879/// \param Impl - If given, also include the layout of the interface's 880/// implementation. This may differ by including synthesized ivars. 881const ASTRecordLayout & 882ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 883 const ObjCImplementationDecl *Impl) { 884 assert(!D->isForwardDecl() && "Invalid interface decl!"); 885 886 // Look up this layout, if already laid out, return what we have. 887 ObjCContainerDecl *Key = 888 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 889 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 890 return *Entry; 891 892 // Add in synthesized ivar count if laying out an implementation. 893 if (Impl) { 894 unsigned FieldCount = D->ivar_size(); 895 unsigned SynthCount = CountSynthesizedIvars(D); 896 FieldCount += SynthCount; 897 // If there aren't any sythesized ivars then reuse the interface 898 // entry. Note we can't cache this because we simply free all 899 // entries later; however we shouldn't look up implementations 900 // frequently. 901 if (SynthCount == 0) 902 return getObjCLayout(D, 0); 903 } 904 905 const ASTRecordLayout *NewEntry = 906 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 907 ObjCLayouts[Key] = NewEntry; 908 909 return *NewEntry; 910} 911 912const ASTRecordLayout & 913ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 914 return getObjCLayout(D, 0); 915} 916 917const ASTRecordLayout & 918ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 919 return getObjCLayout(D->getClassInterface(), D); 920} 921 922/// getASTRecordLayout - Get or compute information about the layout of the 923/// specified record (struct/union/class), which indicates its size and field 924/// position information. 925const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 926 D = D->getDefinition(*this); 927 assert(D && "Cannot get layout of forward declarations!"); 928 929 // Look up this layout, if already laid out, return what we have. 930 // Note that we can't save a reference to the entry because this function 931 // is recursive. 932 const ASTRecordLayout *Entry = ASTRecordLayouts[D]; 933 if (Entry) return *Entry; 934 935 const ASTRecordLayout *NewEntry = 936 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 937 ASTRecordLayouts[D] = NewEntry; 938 939 return *NewEntry; 940} 941 942//===----------------------------------------------------------------------===// 943// Type creation/memoization methods 944//===----------------------------------------------------------------------===// 945 946QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 947 QualType CanT = getCanonicalType(T); 948 if (CanT.getAddressSpace() == AddressSpace) 949 return T; 950 951 // If we are composing extended qualifiers together, merge together into one 952 // ExtQualType node. 953 unsigned CVRQuals = T.getCVRQualifiers(); 954 QualType::GCAttrTypes GCAttr = QualType::GCNone; 955 Type *TypeNode = T.getTypePtr(); 956 957 if (ExtQualType *EQT = dyn_cast<ExtQualType>(TypeNode)) { 958 // If this type already has an address space specified, it cannot get 959 // another one. 960 assert(EQT->getAddressSpace() == 0 && 961 "Type cannot be in multiple addr spaces!"); 962 GCAttr = EQT->getObjCGCAttr(); 963 TypeNode = EQT->getBaseType(); 964 } 965 966 // Check if we've already instantiated this type. 967 llvm::FoldingSetNodeID ID; 968 ExtQualType::Profile(ID, TypeNode, AddressSpace, GCAttr); 969 void *InsertPos = 0; 970 if (ExtQualType *EXTQy = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos)) 971 return QualType(EXTQy, CVRQuals); 972 973 // If the base type isn't canonical, this won't be a canonical type either, 974 // so fill in the canonical type field. 975 QualType Canonical; 976 if (!TypeNode->isCanonical()) { 977 Canonical = getAddrSpaceQualType(CanT, AddressSpace); 978 979 // Update InsertPos, the previous call could have invalidated it. 980 ExtQualType *NewIP = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos); 981 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 982 } 983 ExtQualType *New = 984 new (*this, 8) ExtQualType(TypeNode, Canonical, AddressSpace, GCAttr); 985 ExtQualTypes.InsertNode(New, InsertPos); 986 Types.push_back(New); 987 return QualType(New, CVRQuals); 988} 989 990QualType ASTContext::getObjCGCQualType(QualType T, 991 QualType::GCAttrTypes GCAttr) { 992 QualType CanT = getCanonicalType(T); 993 if (CanT.getObjCGCAttr() == GCAttr) 994 return T; 995 996 if (T->isPointerType()) { 997 QualType Pointee = T->getAsPointerType()->getPointeeType(); 998 if (Pointee->isAnyPointerType()) { 999 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1000 return getPointerType(ResultType); 1001 } 1002 } 1003 // If we are composing extended qualifiers together, merge together into one 1004 // ExtQualType node. 1005 unsigned CVRQuals = T.getCVRQualifiers(); 1006 Type *TypeNode = T.getTypePtr(); 1007 unsigned AddressSpace = 0; 1008 1009 if (ExtQualType *EQT = dyn_cast<ExtQualType>(TypeNode)) { 1010 // If this type already has an ObjCGC specified, it cannot get 1011 // another one. 1012 assert(EQT->getObjCGCAttr() == QualType::GCNone && 1013 "Type cannot have multiple ObjCGCs!"); 1014 AddressSpace = EQT->getAddressSpace(); 1015 TypeNode = EQT->getBaseType(); 1016 } 1017 1018 // Check if we've already instantiated an gc qual'd type of this type. 1019 llvm::FoldingSetNodeID ID; 1020 ExtQualType::Profile(ID, TypeNode, AddressSpace, GCAttr); 1021 void *InsertPos = 0; 1022 if (ExtQualType *EXTQy = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos)) 1023 return QualType(EXTQy, CVRQuals); 1024 1025 // If the base type isn't canonical, this won't be a canonical type either, 1026 // so fill in the canonical type field. 1027 // FIXME: Isn't this also not canonical if the base type is a array 1028 // or pointer type? I can't find any documentation for objc_gc, though... 1029 QualType Canonical; 1030 if (!T->isCanonical()) { 1031 Canonical = getObjCGCQualType(CanT, GCAttr); 1032 1033 // Update InsertPos, the previous call could have invalidated it. 1034 ExtQualType *NewIP = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos); 1035 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1036 } 1037 ExtQualType *New = 1038 new (*this, 8) ExtQualType(TypeNode, Canonical, AddressSpace, GCAttr); 1039 ExtQualTypes.InsertNode(New, InsertPos); 1040 Types.push_back(New); 1041 return QualType(New, CVRQuals); 1042} 1043 1044QualType ASTContext::getNoReturnType(QualType T) { 1045 if (T->isPointerType()) { 1046 QualType Pointee = T->getAsPointerType()->getPointeeType(); 1047 QualType ResultType = getNoReturnType(Pointee); 1048 return getPointerType(ResultType); 1049 } 1050 if (T->isBlockPointerType()) { 1051 QualType Pointee = T->getAsBlockPointerType()->getPointeeType(); 1052 QualType ResultType = getNoReturnType(Pointee); 1053 return getBlockPointerType(ResultType); 1054 } 1055 if (!T->isFunctionType()) 1056 assert(0 && "can't noreturn qualify non-pointer to function or block type"); 1057 1058 if (const FunctionNoProtoType *F = dyn_cast<FunctionNoProtoType>(T)) { 1059 return getFunctionNoProtoType(F->getResultType(), true); 1060 } 1061 const FunctionProtoType *F = cast<FunctionProtoType>(T); 1062 return getFunctionType(F->getResultType(), F->arg_type_begin(), 1063 F->getNumArgs(), F->isVariadic(), F->getTypeQuals(), 1064 F->hasExceptionSpec(), F->hasAnyExceptionSpec(), 1065 F->getNumExceptions(), F->exception_begin(), true); 1066} 1067 1068/// getComplexType - Return the uniqued reference to the type for a complex 1069/// number with the specified element type. 1070QualType ASTContext::getComplexType(QualType T) { 1071 // Unique pointers, to guarantee there is only one pointer of a particular 1072 // structure. 1073 llvm::FoldingSetNodeID ID; 1074 ComplexType::Profile(ID, T); 1075 1076 void *InsertPos = 0; 1077 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1078 return QualType(CT, 0); 1079 1080 // If the pointee type isn't canonical, this won't be a canonical type either, 1081 // so fill in the canonical type field. 1082 QualType Canonical; 1083 if (!T->isCanonical()) { 1084 Canonical = getComplexType(getCanonicalType(T)); 1085 1086 // Get the new insert position for the node we care about. 1087 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1088 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1089 } 1090 ComplexType *New = new (*this,8) ComplexType(T, Canonical); 1091 Types.push_back(New); 1092 ComplexTypes.InsertNode(New, InsertPos); 1093 return QualType(New, 0); 1094} 1095 1096QualType ASTContext::getFixedWidthIntType(unsigned Width, bool Signed) { 1097 llvm::DenseMap<unsigned, FixedWidthIntType*> &Map = Signed ? 1098 SignedFixedWidthIntTypes : UnsignedFixedWidthIntTypes; 1099 FixedWidthIntType *&Entry = Map[Width]; 1100 if (!Entry) 1101 Entry = new FixedWidthIntType(Width, Signed); 1102 return QualType(Entry, 0); 1103} 1104 1105/// getPointerType - Return the uniqued reference to the type for a pointer to 1106/// the specified type. 1107QualType ASTContext::getPointerType(QualType T) { 1108 // Unique pointers, to guarantee there is only one pointer of a particular 1109 // structure. 1110 llvm::FoldingSetNodeID ID; 1111 PointerType::Profile(ID, T); 1112 1113 void *InsertPos = 0; 1114 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1115 return QualType(PT, 0); 1116 1117 // If the pointee type isn't canonical, this won't be a canonical type either, 1118 // so fill in the canonical type field. 1119 QualType Canonical; 1120 if (!T->isCanonical()) { 1121 Canonical = getPointerType(getCanonicalType(T)); 1122 1123 // Get the new insert position for the node we care about. 1124 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1125 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1126 } 1127 PointerType *New = new (*this,8) PointerType(T, Canonical); 1128 Types.push_back(New); 1129 PointerTypes.InsertNode(New, InsertPos); 1130 return QualType(New, 0); 1131} 1132 1133/// getBlockPointerType - Return the uniqued reference to the type for 1134/// a pointer to the specified block. 1135QualType ASTContext::getBlockPointerType(QualType T) { 1136 assert(T->isFunctionType() && "block of function types only"); 1137 // Unique pointers, to guarantee there is only one block of a particular 1138 // structure. 1139 llvm::FoldingSetNodeID ID; 1140 BlockPointerType::Profile(ID, T); 1141 1142 void *InsertPos = 0; 1143 if (BlockPointerType *PT = 1144 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1145 return QualType(PT, 0); 1146 1147 // If the block pointee type isn't canonical, this won't be a canonical 1148 // type either so fill in the canonical type field. 1149 QualType Canonical; 1150 if (!T->isCanonical()) { 1151 Canonical = getBlockPointerType(getCanonicalType(T)); 1152 1153 // Get the new insert position for the node we care about. 1154 BlockPointerType *NewIP = 1155 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1156 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1157 } 1158 BlockPointerType *New = new (*this,8) BlockPointerType(T, Canonical); 1159 Types.push_back(New); 1160 BlockPointerTypes.InsertNode(New, InsertPos); 1161 return QualType(New, 0); 1162} 1163 1164/// getLValueReferenceType - Return the uniqued reference to the type for an 1165/// lvalue reference to the specified type. 1166QualType ASTContext::getLValueReferenceType(QualType T) { 1167 // Unique pointers, to guarantee there is only one pointer of a particular 1168 // structure. 1169 llvm::FoldingSetNodeID ID; 1170 ReferenceType::Profile(ID, T); 1171 1172 void *InsertPos = 0; 1173 if (LValueReferenceType *RT = 1174 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1175 return QualType(RT, 0); 1176 1177 // If the referencee type isn't canonical, this won't be a canonical type 1178 // either, so fill in the canonical type field. 1179 QualType Canonical; 1180 if (!T->isCanonical()) { 1181 Canonical = getLValueReferenceType(getCanonicalType(T)); 1182 1183 // Get the new insert position for the node we care about. 1184 LValueReferenceType *NewIP = 1185 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1186 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1187 } 1188 1189 LValueReferenceType *New = new (*this,8) LValueReferenceType(T, Canonical); 1190 Types.push_back(New); 1191 LValueReferenceTypes.InsertNode(New, InsertPos); 1192 return QualType(New, 0); 1193} 1194 1195/// getRValueReferenceType - Return the uniqued reference to the type for an 1196/// rvalue reference to the specified type. 1197QualType ASTContext::getRValueReferenceType(QualType T) { 1198 // Unique pointers, to guarantee there is only one pointer of a particular 1199 // structure. 1200 llvm::FoldingSetNodeID ID; 1201 ReferenceType::Profile(ID, T); 1202 1203 void *InsertPos = 0; 1204 if (RValueReferenceType *RT = 1205 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1206 return QualType(RT, 0); 1207 1208 // If the referencee type isn't canonical, this won't be a canonical type 1209 // either, so fill in the canonical type field. 1210 QualType Canonical; 1211 if (!T->isCanonical()) { 1212 Canonical = getRValueReferenceType(getCanonicalType(T)); 1213 1214 // Get the new insert position for the node we care about. 1215 RValueReferenceType *NewIP = 1216 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1217 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1218 } 1219 1220 RValueReferenceType *New = new (*this,8) RValueReferenceType(T, Canonical); 1221 Types.push_back(New); 1222 RValueReferenceTypes.InsertNode(New, InsertPos); 1223 return QualType(New, 0); 1224} 1225 1226/// getMemberPointerType - Return the uniqued reference to the type for a 1227/// member pointer to the specified type, in the specified class. 1228QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) 1229{ 1230 // Unique pointers, to guarantee there is only one pointer of a particular 1231 // structure. 1232 llvm::FoldingSetNodeID ID; 1233 MemberPointerType::Profile(ID, T, Cls); 1234 1235 void *InsertPos = 0; 1236 if (MemberPointerType *PT = 1237 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1238 return QualType(PT, 0); 1239 1240 // If the pointee or class type isn't canonical, this won't be a canonical 1241 // type either, so fill in the canonical type field. 1242 QualType Canonical; 1243 if (!T->isCanonical()) { 1244 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1245 1246 // Get the new insert position for the node we care about. 1247 MemberPointerType *NewIP = 1248 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1249 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1250 } 1251 MemberPointerType *New = new (*this,8) MemberPointerType(T, Cls, Canonical); 1252 Types.push_back(New); 1253 MemberPointerTypes.InsertNode(New, InsertPos); 1254 return QualType(New, 0); 1255} 1256 1257/// getConstantArrayType - Return the unique reference to the type for an 1258/// array of the specified element type. 1259QualType ASTContext::getConstantArrayType(QualType EltTy, 1260 const llvm::APInt &ArySizeIn, 1261 ArrayType::ArraySizeModifier ASM, 1262 unsigned EltTypeQuals) { 1263 assert((EltTy->isDependentType() || EltTy->isConstantSizeType()) && 1264 "Constant array of VLAs is illegal!"); 1265 1266 // Convert the array size into a canonical width matching the pointer size for 1267 // the target. 1268 llvm::APInt ArySize(ArySizeIn); 1269 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1270 1271 llvm::FoldingSetNodeID ID; 1272 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1273 1274 void *InsertPos = 0; 1275 if (ConstantArrayType *ATP = 1276 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1277 return QualType(ATP, 0); 1278 1279 // If the element type isn't canonical, this won't be a canonical type either, 1280 // so fill in the canonical type field. 1281 QualType Canonical; 1282 if (!EltTy->isCanonical()) { 1283 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1284 ASM, EltTypeQuals); 1285 // Get the new insert position for the node we care about. 1286 ConstantArrayType *NewIP = 1287 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1288 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1289 } 1290 1291 ConstantArrayType *New = 1292 new(*this,8)ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1293 ConstantArrayTypes.InsertNode(New, InsertPos); 1294 Types.push_back(New); 1295 return QualType(New, 0); 1296} 1297 1298/// getConstantArrayWithExprType - Return a reference to the type for 1299/// an array of the specified element type. 1300QualType 1301ASTContext::getConstantArrayWithExprType(QualType EltTy, 1302 const llvm::APInt &ArySizeIn, 1303 Expr *ArySizeExpr, 1304 ArrayType::ArraySizeModifier ASM, 1305 unsigned EltTypeQuals, 1306 SourceRange Brackets) { 1307 // Convert the array size into a canonical width matching the pointer 1308 // size for the target. 1309 llvm::APInt ArySize(ArySizeIn); 1310 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1311 1312 // Compute the canonical ConstantArrayType. 1313 QualType Canonical = getConstantArrayType(getCanonicalType(EltTy), 1314 ArySize, ASM, EltTypeQuals); 1315 // Since we don't unique expressions, it isn't possible to unique VLA's 1316 // that have an expression provided for their size. 1317 ConstantArrayWithExprType *New = 1318 new(*this,8)ConstantArrayWithExprType(EltTy, Canonical, 1319 ArySize, ArySizeExpr, 1320 ASM, EltTypeQuals, Brackets); 1321 Types.push_back(New); 1322 return QualType(New, 0); 1323} 1324 1325/// getConstantArrayWithoutExprType - Return a reference to the type for 1326/// an array of the specified element type. 1327QualType 1328ASTContext::getConstantArrayWithoutExprType(QualType EltTy, 1329 const llvm::APInt &ArySizeIn, 1330 ArrayType::ArraySizeModifier ASM, 1331 unsigned EltTypeQuals) { 1332 // Convert the array size into a canonical width matching the pointer 1333 // size for the target. 1334 llvm::APInt ArySize(ArySizeIn); 1335 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1336 1337 // Compute the canonical ConstantArrayType. 1338 QualType Canonical = getConstantArrayType(getCanonicalType(EltTy), 1339 ArySize, ASM, EltTypeQuals); 1340 ConstantArrayWithoutExprType *New = 1341 new(*this,8)ConstantArrayWithoutExprType(EltTy, Canonical, 1342 ArySize, ASM, EltTypeQuals); 1343 Types.push_back(New); 1344 return QualType(New, 0); 1345} 1346 1347/// getVariableArrayType - Returns a non-unique reference to the type for a 1348/// variable array of the specified element type. 1349QualType ASTContext::getVariableArrayType(QualType EltTy, 1350 Expr *NumElts, 1351 ArrayType::ArraySizeModifier ASM, 1352 unsigned EltTypeQuals, 1353 SourceRange Brackets) { 1354 // Since we don't unique expressions, it isn't possible to unique VLA's 1355 // that have an expression provided for their size. 1356 1357 VariableArrayType *New = 1358 new(*this,8)VariableArrayType(EltTy, QualType(), 1359 NumElts, ASM, EltTypeQuals, Brackets); 1360 1361 VariableArrayTypes.push_back(New); 1362 Types.push_back(New); 1363 return QualType(New, 0); 1364} 1365 1366/// getDependentSizedArrayType - Returns a non-unique reference to 1367/// the type for a dependently-sized array of the specified element 1368/// type. FIXME: We will need these to be uniqued, or at least 1369/// comparable, at some point. 1370QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1371 Expr *NumElts, 1372 ArrayType::ArraySizeModifier ASM, 1373 unsigned EltTypeQuals, 1374 SourceRange Brackets) { 1375 assert((NumElts->isTypeDependent() || NumElts->isValueDependent()) && 1376 "Size must be type- or value-dependent!"); 1377 1378 // Since we don't unique expressions, it isn't possible to unique 1379 // dependently-sized array types. 1380 1381 DependentSizedArrayType *New = 1382 new (*this,8) DependentSizedArrayType(EltTy, QualType(), 1383 NumElts, ASM, EltTypeQuals, 1384 Brackets); 1385 1386 DependentSizedArrayTypes.push_back(New); 1387 Types.push_back(New); 1388 return QualType(New, 0); 1389} 1390 1391QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1392 ArrayType::ArraySizeModifier ASM, 1393 unsigned EltTypeQuals) { 1394 llvm::FoldingSetNodeID ID; 1395 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1396 1397 void *InsertPos = 0; 1398 if (IncompleteArrayType *ATP = 1399 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1400 return QualType(ATP, 0); 1401 1402 // If the element type isn't canonical, this won't be a canonical type 1403 // either, so fill in the canonical type field. 1404 QualType Canonical; 1405 1406 if (!EltTy->isCanonical()) { 1407 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1408 ASM, EltTypeQuals); 1409 1410 // Get the new insert position for the node we care about. 1411 IncompleteArrayType *NewIP = 1412 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1413 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1414 } 1415 1416 IncompleteArrayType *New 1417 = new (*this,8) IncompleteArrayType(EltTy, Canonical, 1418 ASM, EltTypeQuals); 1419 1420 IncompleteArrayTypes.InsertNode(New, InsertPos); 1421 Types.push_back(New); 1422 return QualType(New, 0); 1423} 1424 1425/// getVectorType - Return the unique reference to a vector type of 1426/// the specified element type and size. VectorType must be a built-in type. 1427QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts) { 1428 BuiltinType *baseType; 1429 1430 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1431 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1432 1433 // Check if we've already instantiated a vector of this type. 1434 llvm::FoldingSetNodeID ID; 1435 VectorType::Profile(ID, vecType, NumElts, Type::Vector); 1436 void *InsertPos = 0; 1437 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1438 return QualType(VTP, 0); 1439 1440 // If the element type isn't canonical, this won't be a canonical type either, 1441 // so fill in the canonical type field. 1442 QualType Canonical; 1443 if (!vecType->isCanonical()) { 1444 Canonical = getVectorType(getCanonicalType(vecType), NumElts); 1445 1446 // Get the new insert position for the node we care about. 1447 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1448 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1449 } 1450 VectorType *New = new (*this,8) VectorType(vecType, NumElts, Canonical); 1451 VectorTypes.InsertNode(New, InsertPos); 1452 Types.push_back(New); 1453 return QualType(New, 0); 1454} 1455 1456/// getExtVectorType - Return the unique reference to an extended vector type of 1457/// the specified element type and size. VectorType must be a built-in type. 1458QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1459 BuiltinType *baseType; 1460 1461 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1462 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1463 1464 // Check if we've already instantiated a vector of this type. 1465 llvm::FoldingSetNodeID ID; 1466 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector); 1467 void *InsertPos = 0; 1468 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1469 return QualType(VTP, 0); 1470 1471 // If the element type isn't canonical, this won't be a canonical type either, 1472 // so fill in the canonical type field. 1473 QualType Canonical; 1474 if (!vecType->isCanonical()) { 1475 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1476 1477 // Get the new insert position for the node we care about. 1478 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1479 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1480 } 1481 ExtVectorType *New = new (*this,8) ExtVectorType(vecType, NumElts, Canonical); 1482 VectorTypes.InsertNode(New, InsertPos); 1483 Types.push_back(New); 1484 return QualType(New, 0); 1485} 1486 1487QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1488 Expr *SizeExpr, 1489 SourceLocation AttrLoc) { 1490 DependentSizedExtVectorType *New = 1491 new (*this,8) DependentSizedExtVectorType(vecType, QualType(), 1492 SizeExpr, AttrLoc); 1493 1494 DependentSizedExtVectorTypes.push_back(New); 1495 Types.push_back(New); 1496 return QualType(New, 0); 1497} 1498 1499/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1500/// 1501QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, bool NoReturn) { 1502 // Unique functions, to guarantee there is only one function of a particular 1503 // structure. 1504 llvm::FoldingSetNodeID ID; 1505 FunctionNoProtoType::Profile(ID, ResultTy, NoReturn); 1506 1507 void *InsertPos = 0; 1508 if (FunctionNoProtoType *FT = 1509 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1510 return QualType(FT, 0); 1511 1512 QualType Canonical; 1513 if (!ResultTy->isCanonical()) { 1514 Canonical = getFunctionNoProtoType(getCanonicalType(ResultTy), NoReturn); 1515 1516 // Get the new insert position for the node we care about. 1517 FunctionNoProtoType *NewIP = 1518 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1519 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1520 } 1521 1522 FunctionNoProtoType *New 1523 = new (*this,8) FunctionNoProtoType(ResultTy, Canonical, NoReturn); 1524 Types.push_back(New); 1525 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1526 return QualType(New, 0); 1527} 1528 1529/// getFunctionType - Return a normal function type with a typed argument 1530/// list. isVariadic indicates whether the argument list includes '...'. 1531QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1532 unsigned NumArgs, bool isVariadic, 1533 unsigned TypeQuals, bool hasExceptionSpec, 1534 bool hasAnyExceptionSpec, unsigned NumExs, 1535 const QualType *ExArray, bool NoReturn) { 1536 // Unique functions, to guarantee there is only one function of a particular 1537 // structure. 1538 llvm::FoldingSetNodeID ID; 1539 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1540 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1541 NumExs, ExArray, NoReturn); 1542 1543 void *InsertPos = 0; 1544 if (FunctionProtoType *FTP = 1545 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1546 return QualType(FTP, 0); 1547 1548 // Determine whether the type being created is already canonical or not. 1549 bool isCanonical = ResultTy->isCanonical(); 1550 if (hasExceptionSpec) 1551 isCanonical = false; 1552 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1553 if (!ArgArray[i]->isCanonical()) 1554 isCanonical = false; 1555 1556 // If this type isn't canonical, get the canonical version of it. 1557 // The exception spec is not part of the canonical type. 1558 QualType Canonical; 1559 if (!isCanonical) { 1560 llvm::SmallVector<QualType, 16> CanonicalArgs; 1561 CanonicalArgs.reserve(NumArgs); 1562 for (unsigned i = 0; i != NumArgs; ++i) 1563 CanonicalArgs.push_back(getCanonicalType(ArgArray[i])); 1564 1565 Canonical = getFunctionType(getCanonicalType(ResultTy), 1566 CanonicalArgs.data(), NumArgs, 1567 isVariadic, TypeQuals, NoReturn); 1568 1569 // Get the new insert position for the node we care about. 1570 FunctionProtoType *NewIP = 1571 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1572 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1573 } 1574 1575 // FunctionProtoType objects are allocated with extra bytes after them 1576 // for two variable size arrays (for parameter and exception types) at the 1577 // end of them. 1578 FunctionProtoType *FTP = 1579 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1580 NumArgs*sizeof(QualType) + 1581 NumExs*sizeof(QualType), 8); 1582 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1583 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1584 ExArray, NumExs, Canonical, NoReturn); 1585 Types.push_back(FTP); 1586 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1587 return QualType(FTP, 0); 1588} 1589 1590/// getTypeDeclType - Return the unique reference to the type for the 1591/// specified type declaration. 1592QualType ASTContext::getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl) { 1593 assert(Decl && "Passed null for Decl param"); 1594 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1595 1596 if (TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1597 return getTypedefType(Typedef); 1598 else if (isa<TemplateTypeParmDecl>(Decl)) { 1599 assert(false && "Template type parameter types are always available."); 1600 } else if (ObjCInterfaceDecl *ObjCInterface = dyn_cast<ObjCInterfaceDecl>(Decl)) 1601 return getObjCInterfaceType(ObjCInterface); 1602 1603 if (RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1604 if (PrevDecl) 1605 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1606 else 1607 Decl->TypeForDecl = new (*this,8) RecordType(Record); 1608 } 1609 else if (EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1610 if (PrevDecl) 1611 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1612 else 1613 Decl->TypeForDecl = new (*this,8) EnumType(Enum); 1614 } 1615 else 1616 assert(false && "TypeDecl without a type?"); 1617 1618 if (!PrevDecl) Types.push_back(Decl->TypeForDecl); 1619 return QualType(Decl->TypeForDecl, 0); 1620} 1621 1622/// getTypedefType - Return the unique reference to the type for the 1623/// specified typename decl. 1624QualType ASTContext::getTypedefType(TypedefDecl *Decl) { 1625 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1626 1627 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1628 Decl->TypeForDecl = new(*this,8) TypedefType(Type::Typedef, Decl, Canonical); 1629 Types.push_back(Decl->TypeForDecl); 1630 return QualType(Decl->TypeForDecl, 0); 1631} 1632 1633/// \brief Retrieve the template type parameter type for a template 1634/// parameter or parameter pack with the given depth, index, and (optionally) 1635/// name. 1636QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1637 bool ParameterPack, 1638 IdentifierInfo *Name) { 1639 llvm::FoldingSetNodeID ID; 1640 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1641 void *InsertPos = 0; 1642 TemplateTypeParmType *TypeParm 1643 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1644 1645 if (TypeParm) 1646 return QualType(TypeParm, 0); 1647 1648 if (Name) { 1649 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1650 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index, ParameterPack, 1651 Name, Canon); 1652 } else 1653 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index, ParameterPack); 1654 1655 Types.push_back(TypeParm); 1656 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1657 1658 return QualType(TypeParm, 0); 1659} 1660 1661QualType 1662ASTContext::getTemplateSpecializationType(TemplateName Template, 1663 const TemplateArgument *Args, 1664 unsigned NumArgs, 1665 QualType Canon) { 1666 if (!Canon.isNull()) 1667 Canon = getCanonicalType(Canon); 1668 1669 llvm::FoldingSetNodeID ID; 1670 TemplateSpecializationType::Profile(ID, Template, Args, NumArgs); 1671 1672 void *InsertPos = 0; 1673 TemplateSpecializationType *Spec 1674 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1675 1676 if (Spec) 1677 return QualType(Spec, 0); 1678 1679 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1680 sizeof(TemplateArgument) * NumArgs), 1681 8); 1682 Spec = new (Mem) TemplateSpecializationType(Template, Args, NumArgs, Canon); 1683 Types.push_back(Spec); 1684 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1685 1686 return QualType(Spec, 0); 1687} 1688 1689QualType 1690ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1691 QualType NamedType) { 1692 llvm::FoldingSetNodeID ID; 1693 QualifiedNameType::Profile(ID, NNS, NamedType); 1694 1695 void *InsertPos = 0; 1696 QualifiedNameType *T 1697 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1698 if (T) 1699 return QualType(T, 0); 1700 1701 T = new (*this) QualifiedNameType(NNS, NamedType, 1702 getCanonicalType(NamedType)); 1703 Types.push_back(T); 1704 QualifiedNameTypes.InsertNode(T, InsertPos); 1705 return QualType(T, 0); 1706} 1707 1708QualType ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1709 const IdentifierInfo *Name, 1710 QualType Canon) { 1711 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1712 1713 if (Canon.isNull()) { 1714 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1715 if (CanonNNS != NNS) 1716 Canon = getTypenameType(CanonNNS, Name); 1717 } 1718 1719 llvm::FoldingSetNodeID ID; 1720 TypenameType::Profile(ID, NNS, Name); 1721 1722 void *InsertPos = 0; 1723 TypenameType *T 1724 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1725 if (T) 1726 return QualType(T, 0); 1727 1728 T = new (*this) TypenameType(NNS, Name, Canon); 1729 Types.push_back(T); 1730 TypenameTypes.InsertNode(T, InsertPos); 1731 return QualType(T, 0); 1732} 1733 1734QualType 1735ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1736 const TemplateSpecializationType *TemplateId, 1737 QualType Canon) { 1738 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1739 1740 if (Canon.isNull()) { 1741 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1742 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1743 if (CanonNNS != NNS || CanonType != QualType(TemplateId, 0)) { 1744 const TemplateSpecializationType *CanonTemplateId 1745 = CanonType->getAsTemplateSpecializationType(); 1746 assert(CanonTemplateId && 1747 "Canonical type must also be a template specialization type"); 1748 Canon = getTypenameType(CanonNNS, CanonTemplateId); 1749 } 1750 } 1751 1752 llvm::FoldingSetNodeID ID; 1753 TypenameType::Profile(ID, NNS, TemplateId); 1754 1755 void *InsertPos = 0; 1756 TypenameType *T 1757 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1758 if (T) 1759 return QualType(T, 0); 1760 1761 T = new (*this) TypenameType(NNS, TemplateId, Canon); 1762 Types.push_back(T); 1763 TypenameTypes.InsertNode(T, InsertPos); 1764 return QualType(T, 0); 1765} 1766 1767/// CmpProtocolNames - Comparison predicate for sorting protocols 1768/// alphabetically. 1769static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 1770 const ObjCProtocolDecl *RHS) { 1771 return LHS->getDeclName() < RHS->getDeclName(); 1772} 1773 1774static void SortAndUniqueProtocols(ObjCProtocolDecl **&Protocols, 1775 unsigned &NumProtocols) { 1776 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 1777 1778 // Sort protocols, keyed by name. 1779 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 1780 1781 // Remove duplicates. 1782 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 1783 NumProtocols = ProtocolsEnd-Protocols; 1784} 1785 1786/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 1787/// the given interface decl and the conforming protocol list. 1788QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 1789 ObjCProtocolDecl **Protocols, 1790 unsigned NumProtocols) { 1791 // Sort the protocol list alphabetically to canonicalize it. 1792 if (NumProtocols) 1793 SortAndUniqueProtocols(Protocols, NumProtocols); 1794 1795 llvm::FoldingSetNodeID ID; 1796 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 1797 1798 void *InsertPos = 0; 1799 if (ObjCObjectPointerType *QT = 1800 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1801 return QualType(QT, 0); 1802 1803 // No Match; 1804 ObjCObjectPointerType *QType = 1805 new (*this,8) ObjCObjectPointerType(InterfaceT, Protocols, NumProtocols); 1806 1807 Types.push_back(QType); 1808 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 1809 return QualType(QType, 0); 1810} 1811 1812/// getObjCInterfaceType - Return the unique reference to the type for the 1813/// specified ObjC interface decl. The list of protocols is optional. 1814QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 1815 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 1816 if (NumProtocols) 1817 // Sort the protocol list alphabetically to canonicalize it. 1818 SortAndUniqueProtocols(Protocols, NumProtocols); 1819 1820 llvm::FoldingSetNodeID ID; 1821 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 1822 1823 void *InsertPos = 0; 1824 if (ObjCInterfaceType *QT = 1825 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1826 return QualType(QT, 0); 1827 1828 // No Match; 1829 ObjCInterfaceType *QType = 1830 new (*this,8) ObjCInterfaceType(const_cast<ObjCInterfaceDecl*>(Decl), 1831 Protocols, NumProtocols); 1832 Types.push_back(QType); 1833 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 1834 return QualType(QType, 0); 1835} 1836 1837/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 1838/// TypeOfExprType AST's (since expression's are never shared). For example, 1839/// multiple declarations that refer to "typeof(x)" all contain different 1840/// DeclRefExpr's. This doesn't effect the type checker, since it operates 1841/// on canonical type's (which are always unique). 1842QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 1843 TypeOfExprType *toe; 1844 if (tofExpr->isTypeDependent()) 1845 toe = new (*this, 8) TypeOfExprType(tofExpr); 1846 else { 1847 QualType Canonical = getCanonicalType(tofExpr->getType()); 1848 toe = new (*this,8) TypeOfExprType(tofExpr, Canonical); 1849 } 1850 Types.push_back(toe); 1851 return QualType(toe, 0); 1852} 1853 1854/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 1855/// TypeOfType AST's. The only motivation to unique these nodes would be 1856/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 1857/// an issue. This doesn't effect the type checker, since it operates 1858/// on canonical type's (which are always unique). 1859QualType ASTContext::getTypeOfType(QualType tofType) { 1860 QualType Canonical = getCanonicalType(tofType); 1861 TypeOfType *tot = new (*this,8) TypeOfType(tofType, Canonical); 1862 Types.push_back(tot); 1863 return QualType(tot, 0); 1864} 1865 1866/// getDecltypeForExpr - Given an expr, will return the decltype for that 1867/// expression, according to the rules in C++0x [dcl.type.simple]p4 1868static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 1869 if (e->isTypeDependent()) 1870 return Context.DependentTy; 1871 1872 // If e is an id expression or a class member access, decltype(e) is defined 1873 // as the type of the entity named by e. 1874 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 1875 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 1876 return VD->getType(); 1877 } 1878 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 1879 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 1880 return FD->getType(); 1881 } 1882 // If e is a function call or an invocation of an overloaded operator, 1883 // (parentheses around e are ignored), decltype(e) is defined as the 1884 // return type of that function. 1885 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 1886 return CE->getCallReturnType(); 1887 1888 QualType T = e->getType(); 1889 1890 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 1891 // defined as T&, otherwise decltype(e) is defined as T. 1892 if (e->isLvalue(Context) == Expr::LV_Valid) 1893 T = Context.getLValueReferenceType(T); 1894 1895 return T; 1896} 1897 1898/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 1899/// DecltypeType AST's. The only motivation to unique these nodes would be 1900/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 1901/// an issue. This doesn't effect the type checker, since it operates 1902/// on canonical type's (which are always unique). 1903QualType ASTContext::getDecltypeType(Expr *e) { 1904 DecltypeType *dt; 1905 if (e->isTypeDependent()) // FIXME: canonicalize the expression 1906 dt = new (*this, 8) DecltypeType(e, DependentTy); 1907 else { 1908 QualType T = getDecltypeForExpr(e, *this); 1909 dt = new (*this, 8) DecltypeType(e, T, getCanonicalType(T)); 1910 } 1911 Types.push_back(dt); 1912 return QualType(dt, 0); 1913} 1914 1915/// getTagDeclType - Return the unique reference to the type for the 1916/// specified TagDecl (struct/union/class/enum) decl. 1917QualType ASTContext::getTagDeclType(TagDecl *Decl) { 1918 assert (Decl); 1919 return getTypeDeclType(Decl); 1920} 1921 1922/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 1923/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 1924/// needs to agree with the definition in <stddef.h>. 1925QualType ASTContext::getSizeType() const { 1926 return getFromTargetType(Target.getSizeType()); 1927} 1928 1929/// getSignedWCharType - Return the type of "signed wchar_t". 1930/// Used when in C++, as a GCC extension. 1931QualType ASTContext::getSignedWCharType() const { 1932 // FIXME: derive from "Target" ? 1933 return WCharTy; 1934} 1935 1936/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 1937/// Used when in C++, as a GCC extension. 1938QualType ASTContext::getUnsignedWCharType() const { 1939 // FIXME: derive from "Target" ? 1940 return UnsignedIntTy; 1941} 1942 1943/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 1944/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 1945QualType ASTContext::getPointerDiffType() const { 1946 return getFromTargetType(Target.getPtrDiffType(0)); 1947} 1948 1949//===----------------------------------------------------------------------===// 1950// Type Operators 1951//===----------------------------------------------------------------------===// 1952 1953/// getCanonicalType - Return the canonical (structural) type corresponding to 1954/// the specified potentially non-canonical type. The non-canonical version 1955/// of a type may have many "decorated" versions of types. Decorators can 1956/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1957/// to be free of any of these, allowing two canonical types to be compared 1958/// for exact equality with a simple pointer comparison. 1959QualType ASTContext::getCanonicalType(QualType T) { 1960 QualType CanType = T.getTypePtr()->getCanonicalTypeInternal(); 1961 1962 // If the result has type qualifiers, make sure to canonicalize them as well. 1963 unsigned TypeQuals = T.getCVRQualifiers() | CanType.getCVRQualifiers(); 1964 if (TypeQuals == 0) return CanType; 1965 1966 // If the type qualifiers are on an array type, get the canonical type of the 1967 // array with the qualifiers applied to the element type. 1968 ArrayType *AT = dyn_cast<ArrayType>(CanType); 1969 if (!AT) 1970 return CanType.getQualifiedType(TypeQuals); 1971 1972 // Get the canonical version of the element with the extra qualifiers on it. 1973 // This can recursively sink qualifiers through multiple levels of arrays. 1974 QualType NewEltTy=AT->getElementType().getWithAdditionalQualifiers(TypeQuals); 1975 NewEltTy = getCanonicalType(NewEltTy); 1976 1977 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 1978 return getConstantArrayType(NewEltTy, CAT->getSize(),CAT->getSizeModifier(), 1979 CAT->getIndexTypeQualifier()); 1980 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 1981 return getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 1982 IAT->getIndexTypeQualifier()); 1983 1984 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 1985 return getDependentSizedArrayType(NewEltTy, 1986 DSAT->getSizeExpr(), 1987 DSAT->getSizeModifier(), 1988 DSAT->getIndexTypeQualifier(), 1989 DSAT->getBracketsRange()); 1990 1991 VariableArrayType *VAT = cast<VariableArrayType>(AT); 1992 return getVariableArrayType(NewEltTy, 1993 VAT->getSizeExpr(), 1994 VAT->getSizeModifier(), 1995 VAT->getIndexTypeQualifier(), 1996 VAT->getBracketsRange()); 1997} 1998 1999TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2000 // If this template name refers to a template, the canonical 2001 // template name merely stores the template itself. 2002 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2003 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2004 2005 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2006 assert(DTN && "Non-dependent template names must refer to template decls."); 2007 return DTN->CanonicalTemplateName; 2008} 2009 2010NestedNameSpecifier * 2011ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2012 if (!NNS) 2013 return 0; 2014 2015 switch (NNS->getKind()) { 2016 case NestedNameSpecifier::Identifier: 2017 // Canonicalize the prefix but keep the identifier the same. 2018 return NestedNameSpecifier::Create(*this, 2019 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2020 NNS->getAsIdentifier()); 2021 2022 case NestedNameSpecifier::Namespace: 2023 // A namespace is canonical; build a nested-name-specifier with 2024 // this namespace and no prefix. 2025 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2026 2027 case NestedNameSpecifier::TypeSpec: 2028 case NestedNameSpecifier::TypeSpecWithTemplate: { 2029 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2030 NestedNameSpecifier *Prefix = 0; 2031 2032 // FIXME: This isn't the right check! 2033 if (T->isDependentType()) 2034 Prefix = getCanonicalNestedNameSpecifier(NNS->getPrefix()); 2035 2036 return NestedNameSpecifier::Create(*this, Prefix, 2037 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2038 T.getTypePtr()); 2039 } 2040 2041 case NestedNameSpecifier::Global: 2042 // The global specifier is canonical and unique. 2043 return NNS; 2044 } 2045 2046 // Required to silence a GCC warning 2047 return 0; 2048} 2049 2050 2051const ArrayType *ASTContext::getAsArrayType(QualType T) { 2052 // Handle the non-qualified case efficiently. 2053 if (T.getCVRQualifiers() == 0) { 2054 // Handle the common positive case fast. 2055 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2056 return AT; 2057 } 2058 2059 // Handle the common negative case fast, ignoring CVR qualifiers. 2060 QualType CType = T->getCanonicalTypeInternal(); 2061 2062 // Make sure to look through type qualifiers (like ExtQuals) for the negative 2063 // test. 2064 if (!isa<ArrayType>(CType) && 2065 !isa<ArrayType>(CType.getUnqualifiedType())) 2066 return 0; 2067 2068 // Apply any CVR qualifiers from the array type to the element type. This 2069 // implements C99 6.7.3p8: "If the specification of an array type includes 2070 // any type qualifiers, the element type is so qualified, not the array type." 2071 2072 // If we get here, we either have type qualifiers on the type, or we have 2073 // sugar such as a typedef in the way. If we have type qualifiers on the type 2074 // we must propagate them down into the elemeng type. 2075 unsigned CVRQuals = T.getCVRQualifiers(); 2076 unsigned AddrSpace = 0; 2077 Type *Ty = T.getTypePtr(); 2078 2079 // Rip through ExtQualType's and typedefs to get to a concrete type. 2080 while (1) { 2081 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(Ty)) { 2082 AddrSpace = EXTQT->getAddressSpace(); 2083 Ty = EXTQT->getBaseType(); 2084 } else { 2085 T = Ty->getDesugaredType(); 2086 if (T.getTypePtr() == Ty && T.getCVRQualifiers() == 0) 2087 break; 2088 CVRQuals |= T.getCVRQualifiers(); 2089 Ty = T.getTypePtr(); 2090 } 2091 } 2092 2093 // If we have a simple case, just return now. 2094 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2095 if (ATy == 0 || (AddrSpace == 0 && CVRQuals == 0)) 2096 return ATy; 2097 2098 // Otherwise, we have an array and we have qualifiers on it. Push the 2099 // qualifiers into the array element type and return a new array type. 2100 // Get the canonical version of the element with the extra qualifiers on it. 2101 // This can recursively sink qualifiers through multiple levels of arrays. 2102 QualType NewEltTy = ATy->getElementType(); 2103 if (AddrSpace) 2104 NewEltTy = getAddrSpaceQualType(NewEltTy, AddrSpace); 2105 NewEltTy = NewEltTy.getWithAdditionalQualifiers(CVRQuals); 2106 2107 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2108 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2109 CAT->getSizeModifier(), 2110 CAT->getIndexTypeQualifier())); 2111 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2112 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2113 IAT->getSizeModifier(), 2114 IAT->getIndexTypeQualifier())); 2115 2116 if (const DependentSizedArrayType *DSAT 2117 = dyn_cast<DependentSizedArrayType>(ATy)) 2118 return cast<ArrayType>( 2119 getDependentSizedArrayType(NewEltTy, 2120 DSAT->getSizeExpr(), 2121 DSAT->getSizeModifier(), 2122 DSAT->getIndexTypeQualifier(), 2123 DSAT->getBracketsRange())); 2124 2125 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2126 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2127 VAT->getSizeExpr(), 2128 VAT->getSizeModifier(), 2129 VAT->getIndexTypeQualifier(), 2130 VAT->getBracketsRange())); 2131} 2132 2133 2134/// getArrayDecayedType - Return the properly qualified result of decaying the 2135/// specified array type to a pointer. This operation is non-trivial when 2136/// handling typedefs etc. The canonical type of "T" must be an array type, 2137/// this returns a pointer to a properly qualified element of the array. 2138/// 2139/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2140QualType ASTContext::getArrayDecayedType(QualType Ty) { 2141 // Get the element type with 'getAsArrayType' so that we don't lose any 2142 // typedefs in the element type of the array. This also handles propagation 2143 // of type qualifiers from the array type into the element type if present 2144 // (C99 6.7.3p8). 2145 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2146 assert(PrettyArrayType && "Not an array type!"); 2147 2148 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2149 2150 // int x[restrict 4] -> int *restrict 2151 return PtrTy.getQualifiedType(PrettyArrayType->getIndexTypeQualifier()); 2152} 2153 2154QualType ASTContext::getBaseElementType(QualType QT) { 2155 QualifierSet qualifiers; 2156 while (true) { 2157 const Type *UT = qualifiers.strip(QT); 2158 if (const ArrayType *AT = getAsArrayType(QualType(UT,0))) { 2159 QT = AT->getElementType(); 2160 }else { 2161 return qualifiers.apply(QT, *this); 2162 } 2163 } 2164} 2165 2166QualType ASTContext::getBaseElementType(const VariableArrayType *VAT) { 2167 QualType ElemTy = VAT->getElementType(); 2168 2169 if (const VariableArrayType *VAT = getAsVariableArrayType(ElemTy)) 2170 return getBaseElementType(VAT); 2171 2172 return ElemTy; 2173} 2174 2175/// getFloatingRank - Return a relative rank for floating point types. 2176/// This routine will assert if passed a built-in type that isn't a float. 2177static FloatingRank getFloatingRank(QualType T) { 2178 if (const ComplexType *CT = T->getAsComplexType()) 2179 return getFloatingRank(CT->getElementType()); 2180 2181 assert(T->getAsBuiltinType() && "getFloatingRank(): not a floating type"); 2182 switch (T->getAsBuiltinType()->getKind()) { 2183 default: assert(0 && "getFloatingRank(): not a floating type"); 2184 case BuiltinType::Float: return FloatRank; 2185 case BuiltinType::Double: return DoubleRank; 2186 case BuiltinType::LongDouble: return LongDoubleRank; 2187 } 2188} 2189 2190/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2191/// point or a complex type (based on typeDomain/typeSize). 2192/// 'typeDomain' is a real floating point or complex type. 2193/// 'typeSize' is a real floating point or complex type. 2194QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2195 QualType Domain) const { 2196 FloatingRank EltRank = getFloatingRank(Size); 2197 if (Domain->isComplexType()) { 2198 switch (EltRank) { 2199 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2200 case FloatRank: return FloatComplexTy; 2201 case DoubleRank: return DoubleComplexTy; 2202 case LongDoubleRank: return LongDoubleComplexTy; 2203 } 2204 } 2205 2206 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2207 switch (EltRank) { 2208 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2209 case FloatRank: return FloatTy; 2210 case DoubleRank: return DoubleTy; 2211 case LongDoubleRank: return LongDoubleTy; 2212 } 2213} 2214 2215/// getFloatingTypeOrder - Compare the rank of the two specified floating 2216/// point types, ignoring the domain of the type (i.e. 'double' == 2217/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2218/// LHS < RHS, return -1. 2219int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2220 FloatingRank LHSR = getFloatingRank(LHS); 2221 FloatingRank RHSR = getFloatingRank(RHS); 2222 2223 if (LHSR == RHSR) 2224 return 0; 2225 if (LHSR > RHSR) 2226 return 1; 2227 return -1; 2228} 2229 2230/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2231/// routine will assert if passed a built-in type that isn't an integer or enum, 2232/// or if it is not canonicalized. 2233unsigned ASTContext::getIntegerRank(Type *T) { 2234 assert(T->isCanonical() && "T should be canonicalized"); 2235 if (EnumType* ET = dyn_cast<EnumType>(T)) 2236 T = ET->getDecl()->getIntegerType().getTypePtr(); 2237 2238 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2239 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2240 2241 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2242 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2243 2244 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2245 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2246 2247 // There are two things which impact the integer rank: the width, and 2248 // the ordering of builtins. The builtin ordering is encoded in the 2249 // bottom three bits; the width is encoded in the bits above that. 2250 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) 2251 return FWIT->getWidth() << 3; 2252 2253 switch (cast<BuiltinType>(T)->getKind()) { 2254 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2255 case BuiltinType::Bool: 2256 return 1 + (getIntWidth(BoolTy) << 3); 2257 case BuiltinType::Char_S: 2258 case BuiltinType::Char_U: 2259 case BuiltinType::SChar: 2260 case BuiltinType::UChar: 2261 return 2 + (getIntWidth(CharTy) << 3); 2262 case BuiltinType::Short: 2263 case BuiltinType::UShort: 2264 return 3 + (getIntWidth(ShortTy) << 3); 2265 case BuiltinType::Int: 2266 case BuiltinType::UInt: 2267 return 4 + (getIntWidth(IntTy) << 3); 2268 case BuiltinType::Long: 2269 case BuiltinType::ULong: 2270 return 5 + (getIntWidth(LongTy) << 3); 2271 case BuiltinType::LongLong: 2272 case BuiltinType::ULongLong: 2273 return 6 + (getIntWidth(LongLongTy) << 3); 2274 case BuiltinType::Int128: 2275 case BuiltinType::UInt128: 2276 return 7 + (getIntWidth(Int128Ty) << 3); 2277 } 2278} 2279 2280/// getIntegerTypeOrder - Returns the highest ranked integer type: 2281/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2282/// LHS < RHS, return -1. 2283int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2284 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2285 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2286 if (LHSC == RHSC) return 0; 2287 2288 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2289 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2290 2291 unsigned LHSRank = getIntegerRank(LHSC); 2292 unsigned RHSRank = getIntegerRank(RHSC); 2293 2294 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2295 if (LHSRank == RHSRank) return 0; 2296 return LHSRank > RHSRank ? 1 : -1; 2297 } 2298 2299 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2300 if (LHSUnsigned) { 2301 // If the unsigned [LHS] type is larger, return it. 2302 if (LHSRank >= RHSRank) 2303 return 1; 2304 2305 // If the signed type can represent all values of the unsigned type, it 2306 // wins. Because we are dealing with 2's complement and types that are 2307 // powers of two larger than each other, this is always safe. 2308 return -1; 2309 } 2310 2311 // If the unsigned [RHS] type is larger, return it. 2312 if (RHSRank >= LHSRank) 2313 return -1; 2314 2315 // If the signed type can represent all values of the unsigned type, it 2316 // wins. Because we are dealing with 2's complement and types that are 2317 // powers of two larger than each other, this is always safe. 2318 return 1; 2319} 2320 2321// getCFConstantStringType - Return the type used for constant CFStrings. 2322QualType ASTContext::getCFConstantStringType() { 2323 if (!CFConstantStringTypeDecl) { 2324 CFConstantStringTypeDecl = 2325 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2326 &Idents.get("NSConstantString")); 2327 QualType FieldTypes[4]; 2328 2329 // const int *isa; 2330 FieldTypes[0] = getPointerType(IntTy.getQualifiedType(QualType::Const)); 2331 // int flags; 2332 FieldTypes[1] = IntTy; 2333 // const char *str; 2334 FieldTypes[2] = getPointerType(CharTy.getQualifiedType(QualType::Const)); 2335 // long length; 2336 FieldTypes[3] = LongTy; 2337 2338 // Create fields 2339 for (unsigned i = 0; i < 4; ++i) { 2340 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2341 SourceLocation(), 0, 2342 FieldTypes[i], /*BitWidth=*/0, 2343 /*Mutable=*/false); 2344 CFConstantStringTypeDecl->addDecl(Field); 2345 } 2346 2347 CFConstantStringTypeDecl->completeDefinition(*this); 2348 } 2349 2350 return getTagDeclType(CFConstantStringTypeDecl); 2351} 2352 2353void ASTContext::setCFConstantStringType(QualType T) { 2354 const RecordType *Rec = T->getAsRecordType(); 2355 assert(Rec && "Invalid CFConstantStringType"); 2356 CFConstantStringTypeDecl = Rec->getDecl(); 2357} 2358 2359QualType ASTContext::getObjCFastEnumerationStateType() 2360{ 2361 if (!ObjCFastEnumerationStateTypeDecl) { 2362 ObjCFastEnumerationStateTypeDecl = 2363 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2364 &Idents.get("__objcFastEnumerationState")); 2365 2366 QualType FieldTypes[] = { 2367 UnsignedLongTy, 2368 getPointerType(ObjCIdTypedefType), 2369 getPointerType(UnsignedLongTy), 2370 getConstantArrayType(UnsignedLongTy, 2371 llvm::APInt(32, 5), ArrayType::Normal, 0) 2372 }; 2373 2374 for (size_t i = 0; i < 4; ++i) { 2375 FieldDecl *Field = FieldDecl::Create(*this, 2376 ObjCFastEnumerationStateTypeDecl, 2377 SourceLocation(), 0, 2378 FieldTypes[i], /*BitWidth=*/0, 2379 /*Mutable=*/false); 2380 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2381 } 2382 2383 ObjCFastEnumerationStateTypeDecl->completeDefinition(*this); 2384 } 2385 2386 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2387} 2388 2389void ASTContext::setObjCFastEnumerationStateType(QualType T) { 2390 const RecordType *Rec = T->getAsRecordType(); 2391 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 2392 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 2393} 2394 2395// This returns true if a type has been typedefed to BOOL: 2396// typedef <type> BOOL; 2397static bool isTypeTypedefedAsBOOL(QualType T) { 2398 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 2399 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 2400 return II->isStr("BOOL"); 2401 2402 return false; 2403} 2404 2405/// getObjCEncodingTypeSize returns size of type for objective-c encoding 2406/// purpose. 2407int ASTContext::getObjCEncodingTypeSize(QualType type) { 2408 uint64_t sz = getTypeSize(type); 2409 2410 // Make all integer and enum types at least as large as an int 2411 if (sz > 0 && type->isIntegralType()) 2412 sz = std::max(sz, getTypeSize(IntTy)); 2413 // Treat arrays as pointers, since that's how they're passed in. 2414 else if (type->isArrayType()) 2415 sz = getTypeSize(VoidPtrTy); 2416 return sz / getTypeSize(CharTy); 2417} 2418 2419/// getObjCEncodingForMethodDecl - Return the encoded type for this method 2420/// declaration. 2421void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 2422 std::string& S) { 2423 // FIXME: This is not very efficient. 2424 // Encode type qualifer, 'in', 'inout', etc. for the return type. 2425 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 2426 // Encode result type. 2427 getObjCEncodingForType(Decl->getResultType(), S); 2428 // Compute size of all parameters. 2429 // Start with computing size of a pointer in number of bytes. 2430 // FIXME: There might(should) be a better way of doing this computation! 2431 SourceLocation Loc; 2432 int PtrSize = getTypeSize(VoidPtrTy) / getTypeSize(CharTy); 2433 // The first two arguments (self and _cmd) are pointers; account for 2434 // their size. 2435 int ParmOffset = 2 * PtrSize; 2436 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 2437 E = Decl->param_end(); PI != E; ++PI) { 2438 QualType PType = (*PI)->getType(); 2439 int sz = getObjCEncodingTypeSize(PType); 2440 assert (sz > 0 && "getObjCEncodingForMethodDecl - Incomplete param type"); 2441 ParmOffset += sz; 2442 } 2443 S += llvm::utostr(ParmOffset); 2444 S += "@0:"; 2445 S += llvm::utostr(PtrSize); 2446 2447 // Argument types. 2448 ParmOffset = 2 * PtrSize; 2449 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 2450 E = Decl->param_end(); PI != E; ++PI) { 2451 ParmVarDecl *PVDecl = *PI; 2452 QualType PType = PVDecl->getOriginalType(); 2453 if (const ArrayType *AT = 2454 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 2455 // Use array's original type only if it has known number of 2456 // elements. 2457 if (!isa<ConstantArrayType>(AT)) 2458 PType = PVDecl->getType(); 2459 } else if (PType->isFunctionType()) 2460 PType = PVDecl->getType(); 2461 // Process argument qualifiers for user supplied arguments; such as, 2462 // 'in', 'inout', etc. 2463 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 2464 getObjCEncodingForType(PType, S); 2465 S += llvm::utostr(ParmOffset); 2466 ParmOffset += getObjCEncodingTypeSize(PType); 2467 } 2468} 2469 2470/// getObjCEncodingForPropertyDecl - Return the encoded type for this 2471/// property declaration. If non-NULL, Container must be either an 2472/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 2473/// NULL when getting encodings for protocol properties. 2474/// Property attributes are stored as a comma-delimited C string. The simple 2475/// attributes readonly and bycopy are encoded as single characters. The 2476/// parametrized attributes, getter=name, setter=name, and ivar=name, are 2477/// encoded as single characters, followed by an identifier. Property types 2478/// are also encoded as a parametrized attribute. The characters used to encode 2479/// these attributes are defined by the following enumeration: 2480/// @code 2481/// enum PropertyAttributes { 2482/// kPropertyReadOnly = 'R', // property is read-only. 2483/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 2484/// kPropertyByref = '&', // property is a reference to the value last assigned 2485/// kPropertyDynamic = 'D', // property is dynamic 2486/// kPropertyGetter = 'G', // followed by getter selector name 2487/// kPropertySetter = 'S', // followed by setter selector name 2488/// kPropertyInstanceVariable = 'V' // followed by instance variable name 2489/// kPropertyType = 't' // followed by old-style type encoding. 2490/// kPropertyWeak = 'W' // 'weak' property 2491/// kPropertyStrong = 'P' // property GC'able 2492/// kPropertyNonAtomic = 'N' // property non-atomic 2493/// }; 2494/// @endcode 2495void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 2496 const Decl *Container, 2497 std::string& S) { 2498 // Collect information from the property implementation decl(s). 2499 bool Dynamic = false; 2500 ObjCPropertyImplDecl *SynthesizePID = 0; 2501 2502 // FIXME: Duplicated code due to poor abstraction. 2503 if (Container) { 2504 if (const ObjCCategoryImplDecl *CID = 2505 dyn_cast<ObjCCategoryImplDecl>(Container)) { 2506 for (ObjCCategoryImplDecl::propimpl_iterator 2507 i = CID->propimpl_begin(), e = CID->propimpl_end(); 2508 i != e; ++i) { 2509 ObjCPropertyImplDecl *PID = *i; 2510 if (PID->getPropertyDecl() == PD) { 2511 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 2512 Dynamic = true; 2513 } else { 2514 SynthesizePID = PID; 2515 } 2516 } 2517 } 2518 } else { 2519 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 2520 for (ObjCCategoryImplDecl::propimpl_iterator 2521 i = OID->propimpl_begin(), e = OID->propimpl_end(); 2522 i != e; ++i) { 2523 ObjCPropertyImplDecl *PID = *i; 2524 if (PID->getPropertyDecl() == PD) { 2525 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 2526 Dynamic = true; 2527 } else { 2528 SynthesizePID = PID; 2529 } 2530 } 2531 } 2532 } 2533 } 2534 2535 // FIXME: This is not very efficient. 2536 S = "T"; 2537 2538 // Encode result type. 2539 // GCC has some special rules regarding encoding of properties which 2540 // closely resembles encoding of ivars. 2541 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 2542 true /* outermost type */, 2543 true /* encoding for property */); 2544 2545 if (PD->isReadOnly()) { 2546 S += ",R"; 2547 } else { 2548 switch (PD->getSetterKind()) { 2549 case ObjCPropertyDecl::Assign: break; 2550 case ObjCPropertyDecl::Copy: S += ",C"; break; 2551 case ObjCPropertyDecl::Retain: S += ",&"; break; 2552 } 2553 } 2554 2555 // It really isn't clear at all what this means, since properties 2556 // are "dynamic by default". 2557 if (Dynamic) 2558 S += ",D"; 2559 2560 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 2561 S += ",N"; 2562 2563 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 2564 S += ",G"; 2565 S += PD->getGetterName().getAsString(); 2566 } 2567 2568 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 2569 S += ",S"; 2570 S += PD->getSetterName().getAsString(); 2571 } 2572 2573 if (SynthesizePID) { 2574 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 2575 S += ",V"; 2576 S += OID->getNameAsString(); 2577 } 2578 2579 // FIXME: OBJCGC: weak & strong 2580} 2581 2582/// getLegacyIntegralTypeEncoding - 2583/// Another legacy compatibility encoding: 32-bit longs are encoded as 2584/// 'l' or 'L' , but not always. For typedefs, we need to use 2585/// 'i' or 'I' instead if encoding a struct field, or a pointer! 2586/// 2587void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 2588 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 2589 if (const BuiltinType *BT = PointeeTy->getAsBuiltinType()) { 2590 if (BT->getKind() == BuiltinType::ULong && 2591 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 2592 PointeeTy = UnsignedIntTy; 2593 else 2594 if (BT->getKind() == BuiltinType::Long && 2595 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 2596 PointeeTy = IntTy; 2597 } 2598 } 2599} 2600 2601void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 2602 const FieldDecl *Field) { 2603 // We follow the behavior of gcc, expanding structures which are 2604 // directly pointed to, and expanding embedded structures. Note that 2605 // these rules are sufficient to prevent recursive encoding of the 2606 // same type. 2607 getObjCEncodingForTypeImpl(T, S, true, true, Field, 2608 true /* outermost type */); 2609} 2610 2611static void EncodeBitField(const ASTContext *Context, std::string& S, 2612 const FieldDecl *FD) { 2613 const Expr *E = FD->getBitWidth(); 2614 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 2615 ASTContext *Ctx = const_cast<ASTContext*>(Context); 2616 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 2617 S += 'b'; 2618 S += llvm::utostr(N); 2619} 2620 2621void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 2622 bool ExpandPointedToStructures, 2623 bool ExpandStructures, 2624 const FieldDecl *FD, 2625 bool OutermostType, 2626 bool EncodingProperty) { 2627 if (const BuiltinType *BT = T->getAsBuiltinType()) { 2628 if (FD && FD->isBitField()) 2629 return EncodeBitField(this, S, FD); 2630 char encoding; 2631 switch (BT->getKind()) { 2632 default: assert(0 && "Unhandled builtin type kind"); 2633 case BuiltinType::Void: encoding = 'v'; break; 2634 case BuiltinType::Bool: encoding = 'B'; break; 2635 case BuiltinType::Char_U: 2636 case BuiltinType::UChar: encoding = 'C'; break; 2637 case BuiltinType::UShort: encoding = 'S'; break; 2638 case BuiltinType::UInt: encoding = 'I'; break; 2639 case BuiltinType::ULong: 2640 encoding = 2641 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 2642 break; 2643 case BuiltinType::UInt128: encoding = 'T'; break; 2644 case BuiltinType::ULongLong: encoding = 'Q'; break; 2645 case BuiltinType::Char_S: 2646 case BuiltinType::SChar: encoding = 'c'; break; 2647 case BuiltinType::Short: encoding = 's'; break; 2648 case BuiltinType::Int: encoding = 'i'; break; 2649 case BuiltinType::Long: 2650 encoding = 2651 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 2652 break; 2653 case BuiltinType::LongLong: encoding = 'q'; break; 2654 case BuiltinType::Int128: encoding = 't'; break; 2655 case BuiltinType::Float: encoding = 'f'; break; 2656 case BuiltinType::Double: encoding = 'd'; break; 2657 case BuiltinType::LongDouble: encoding = 'd'; break; 2658 } 2659 2660 S += encoding; 2661 return; 2662 } 2663 2664 if (const ComplexType *CT = T->getAsComplexType()) { 2665 S += 'j'; 2666 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 2667 false); 2668 return; 2669 } 2670 2671 if (const PointerType *PT = T->getAsPointerType()) { 2672 QualType PointeeTy = PT->getPointeeType(); 2673 bool isReadOnly = false; 2674 // For historical/compatibility reasons, the read-only qualifier of the 2675 // pointee gets emitted _before_ the '^'. The read-only qualifier of 2676 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 2677 // Also, do not emit the 'r' for anything but the outermost type! 2678 if (isa<TypedefType>(T.getTypePtr())) { 2679 if (OutermostType && T.isConstQualified()) { 2680 isReadOnly = true; 2681 S += 'r'; 2682 } 2683 } 2684 else if (OutermostType) { 2685 QualType P = PointeeTy; 2686 while (P->getAsPointerType()) 2687 P = P->getAsPointerType()->getPointeeType(); 2688 if (P.isConstQualified()) { 2689 isReadOnly = true; 2690 S += 'r'; 2691 } 2692 } 2693 if (isReadOnly) { 2694 // Another legacy compatibility encoding. Some ObjC qualifier and type 2695 // combinations need to be rearranged. 2696 // Rewrite "in const" from "nr" to "rn" 2697 const char * s = S.c_str(); 2698 int len = S.length(); 2699 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 2700 std::string replace = "rn"; 2701 S.replace(S.end()-2, S.end(), replace); 2702 } 2703 } 2704 if (isObjCSelType(PointeeTy)) { 2705 S += ':'; 2706 return; 2707 } 2708 2709 if (PointeeTy->isCharType()) { 2710 // char pointer types should be encoded as '*' unless it is a 2711 // type that has been typedef'd to 'BOOL'. 2712 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 2713 S += '*'; 2714 return; 2715 } 2716 } else if (const RecordType *RTy = PointeeTy->getAsRecordType()) { 2717 // GCC binary compat: Need to convert "struct objc_class *" to "#". 2718 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 2719 S += '#'; 2720 return; 2721 } 2722 // GCC binary compat: Need to convert "struct objc_object *" to "@". 2723 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 2724 S += '@'; 2725 return; 2726 } 2727 // fall through... 2728 } 2729 S += '^'; 2730 getLegacyIntegralTypeEncoding(PointeeTy); 2731 2732 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 2733 NULL); 2734 return; 2735 } 2736 2737 if (const ArrayType *AT = 2738 // Ignore type qualifiers etc. 2739 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 2740 if (isa<IncompleteArrayType>(AT)) { 2741 // Incomplete arrays are encoded as a pointer to the array element. 2742 S += '^'; 2743 2744 getObjCEncodingForTypeImpl(AT->getElementType(), S, 2745 false, ExpandStructures, FD); 2746 } else { 2747 S += '['; 2748 2749 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2750 S += llvm::utostr(CAT->getSize().getZExtValue()); 2751 else { 2752 //Variable length arrays are encoded as a regular array with 0 elements. 2753 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 2754 S += '0'; 2755 } 2756 2757 getObjCEncodingForTypeImpl(AT->getElementType(), S, 2758 false, ExpandStructures, FD); 2759 S += ']'; 2760 } 2761 return; 2762 } 2763 2764 if (T->getAsFunctionType()) { 2765 S += '?'; 2766 return; 2767 } 2768 2769 if (const RecordType *RTy = T->getAsRecordType()) { 2770 RecordDecl *RDecl = RTy->getDecl(); 2771 S += RDecl->isUnion() ? '(' : '{'; 2772 // Anonymous structures print as '?' 2773 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 2774 S += II->getName(); 2775 } else { 2776 S += '?'; 2777 } 2778 if (ExpandStructures) { 2779 S += '='; 2780 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 2781 FieldEnd = RDecl->field_end(); 2782 Field != FieldEnd; ++Field) { 2783 if (FD) { 2784 S += '"'; 2785 S += Field->getNameAsString(); 2786 S += '"'; 2787 } 2788 2789 // Special case bit-fields. 2790 if (Field->isBitField()) { 2791 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 2792 (*Field)); 2793 } else { 2794 QualType qt = Field->getType(); 2795 getLegacyIntegralTypeEncoding(qt); 2796 getObjCEncodingForTypeImpl(qt, S, false, true, 2797 FD); 2798 } 2799 } 2800 } 2801 S += RDecl->isUnion() ? ')' : '}'; 2802 return; 2803 } 2804 2805 if (T->isEnumeralType()) { 2806 if (FD && FD->isBitField()) 2807 EncodeBitField(this, S, FD); 2808 else 2809 S += 'i'; 2810 return; 2811 } 2812 2813 if (T->isBlockPointerType()) { 2814 S += "@?"; // Unlike a pointer-to-function, which is "^?". 2815 return; 2816 } 2817 2818 if (T->isObjCInterfaceType()) { 2819 // @encode(class_name) 2820 ObjCInterfaceDecl *OI = T->getAsObjCInterfaceType()->getDecl(); 2821 S += '{'; 2822 const IdentifierInfo *II = OI->getIdentifier(); 2823 S += II->getName(); 2824 S += '='; 2825 llvm::SmallVector<FieldDecl*, 32> RecFields; 2826 CollectObjCIvars(OI, RecFields); 2827 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 2828 if (RecFields[i]->isBitField()) 2829 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 2830 RecFields[i]); 2831 else 2832 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 2833 FD); 2834 } 2835 S += '}'; 2836 return; 2837 } 2838 2839 if (const ObjCObjectPointerType *OPT = T->getAsObjCObjectPointerType()) { 2840 if (OPT->isObjCIdType()) { 2841 S += '@'; 2842 return; 2843 } 2844 2845 if (OPT->isObjCClassType()) { 2846 S += '#'; 2847 return; 2848 } 2849 2850 if (OPT->isObjCQualifiedIdType()) { 2851 getObjCEncodingForTypeImpl(getObjCIdType(), S, 2852 ExpandPointedToStructures, 2853 ExpandStructures, FD); 2854 if (FD || EncodingProperty) { 2855 // Note that we do extended encoding of protocol qualifer list 2856 // Only when doing ivar or property encoding. 2857 S += '"'; 2858 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 2859 E = OPT->qual_end(); I != E; ++I) { 2860 S += '<'; 2861 S += (*I)->getNameAsString(); 2862 S += '>'; 2863 } 2864 S += '"'; 2865 } 2866 return; 2867 } 2868 2869 QualType PointeeTy = OPT->getPointeeType(); 2870 if (!EncodingProperty && 2871 isa<TypedefType>(PointeeTy.getTypePtr())) { 2872 // Another historical/compatibility reason. 2873 // We encode the underlying type which comes out as 2874 // {...}; 2875 S += '^'; 2876 getObjCEncodingForTypeImpl(PointeeTy, S, 2877 false, ExpandPointedToStructures, 2878 NULL); 2879 return; 2880 } 2881 2882 S += '@'; 2883 if (FD || EncodingProperty) { 2884 S += '"'; 2885 S += OPT->getInterfaceDecl()->getNameAsCString(); 2886 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 2887 E = OPT->qual_end(); I != E; ++I) { 2888 S += '<'; 2889 S += (*I)->getNameAsString(); 2890 S += '>'; 2891 } 2892 S += '"'; 2893 } 2894 return; 2895 } 2896 2897 assert(0 && "@encode for type not implemented!"); 2898} 2899 2900void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 2901 std::string& S) const { 2902 if (QT & Decl::OBJC_TQ_In) 2903 S += 'n'; 2904 if (QT & Decl::OBJC_TQ_Inout) 2905 S += 'N'; 2906 if (QT & Decl::OBJC_TQ_Out) 2907 S += 'o'; 2908 if (QT & Decl::OBJC_TQ_Bycopy) 2909 S += 'O'; 2910 if (QT & Decl::OBJC_TQ_Byref) 2911 S += 'R'; 2912 if (QT & Decl::OBJC_TQ_Oneway) 2913 S += 'V'; 2914} 2915 2916void ASTContext::setBuiltinVaListType(QualType T) { 2917 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 2918 2919 BuiltinVaListType = T; 2920} 2921 2922void ASTContext::setObjCIdType(QualType T) { 2923 ObjCIdTypedefType = T; 2924} 2925 2926void ASTContext::setObjCSelType(QualType T) { 2927 ObjCSelType = T; 2928 2929 const TypedefType *TT = T->getAsTypedefType(); 2930 if (!TT) 2931 return; 2932 TypedefDecl *TD = TT->getDecl(); 2933 2934 // typedef struct objc_selector *SEL; 2935 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType(); 2936 if (!ptr) 2937 return; 2938 const RecordType *rec = ptr->getPointeeType()->getAsStructureType(); 2939 if (!rec) 2940 return; 2941 SelStructType = rec; 2942} 2943 2944void ASTContext::setObjCProtoType(QualType QT) { 2945 ObjCProtoType = QT; 2946} 2947 2948void ASTContext::setObjCClassType(QualType T) { 2949 ObjCClassTypedefType = T; 2950} 2951 2952void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 2953 assert(ObjCConstantStringType.isNull() && 2954 "'NSConstantString' type already set!"); 2955 2956 ObjCConstantStringType = getObjCInterfaceType(Decl); 2957} 2958 2959/// \brief Retrieve the template name that represents a qualified 2960/// template name such as \c std::vector. 2961TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 2962 bool TemplateKeyword, 2963 TemplateDecl *Template) { 2964 llvm::FoldingSetNodeID ID; 2965 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 2966 2967 void *InsertPos = 0; 2968 QualifiedTemplateName *QTN = 2969 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 2970 if (!QTN) { 2971 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 2972 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 2973 } 2974 2975 return TemplateName(QTN); 2976} 2977 2978/// \brief Retrieve the template name that represents a dependent 2979/// template name such as \c MetaFun::template apply. 2980TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 2981 const IdentifierInfo *Name) { 2982 assert(NNS->isDependent() && "Nested name specifier must be dependent"); 2983 2984 llvm::FoldingSetNodeID ID; 2985 DependentTemplateName::Profile(ID, NNS, Name); 2986 2987 void *InsertPos = 0; 2988 DependentTemplateName *QTN = 2989 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 2990 2991 if (QTN) 2992 return TemplateName(QTN); 2993 2994 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2995 if (CanonNNS == NNS) { 2996 QTN = new (*this,4) DependentTemplateName(NNS, Name); 2997 } else { 2998 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 2999 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3000 } 3001 3002 DependentTemplateNames.InsertNode(QTN, InsertPos); 3003 return TemplateName(QTN); 3004} 3005 3006/// getFromTargetType - Given one of the integer types provided by 3007/// TargetInfo, produce the corresponding type. The unsigned @p Type 3008/// is actually a value of type @c TargetInfo::IntType. 3009QualType ASTContext::getFromTargetType(unsigned Type) const { 3010 switch (Type) { 3011 case TargetInfo::NoInt: return QualType(); 3012 case TargetInfo::SignedShort: return ShortTy; 3013 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3014 case TargetInfo::SignedInt: return IntTy; 3015 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3016 case TargetInfo::SignedLong: return LongTy; 3017 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3018 case TargetInfo::SignedLongLong: return LongLongTy; 3019 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3020 } 3021 3022 assert(false && "Unhandled TargetInfo::IntType value"); 3023 return QualType(); 3024} 3025 3026//===----------------------------------------------------------------------===// 3027// Type Predicates. 3028//===----------------------------------------------------------------------===// 3029 3030/// isObjCNSObjectType - Return true if this is an NSObject object using 3031/// NSObject attribute on a c-style pointer type. 3032/// FIXME - Make it work directly on types. 3033/// FIXME: Move to Type. 3034/// 3035bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3036 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3037 if (TypedefDecl *TD = TDT->getDecl()) 3038 if (TD->getAttr<ObjCNSObjectAttr>()) 3039 return true; 3040 } 3041 return false; 3042} 3043 3044/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3045/// garbage collection attribute. 3046/// 3047QualType::GCAttrTypes ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3048 QualType::GCAttrTypes GCAttrs = QualType::GCNone; 3049 if (getLangOptions().ObjC1 && 3050 getLangOptions().getGCMode() != LangOptions::NonGC) { 3051 GCAttrs = Ty.getObjCGCAttr(); 3052 // Default behavious under objective-c's gc is for objective-c pointers 3053 // (or pointers to them) be treated as though they were declared 3054 // as __strong. 3055 if (GCAttrs == QualType::GCNone) { 3056 if (Ty->isObjCObjectPointerType()) 3057 GCAttrs = QualType::Strong; 3058 else if (Ty->isPointerType()) 3059 return getObjCGCAttrKind(Ty->getAsPointerType()->getPointeeType()); 3060 } 3061 // Non-pointers have none gc'able attribute regardless of the attribute 3062 // set on them. 3063 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3064 return QualType::GCNone; 3065 } 3066 return GCAttrs; 3067} 3068 3069//===----------------------------------------------------------------------===// 3070// Type Compatibility Testing 3071//===----------------------------------------------------------------------===// 3072 3073/// areCompatVectorTypes - Return true if the two specified vector types are 3074/// compatible. 3075static bool areCompatVectorTypes(const VectorType *LHS, 3076 const VectorType *RHS) { 3077 assert(LHS->isCanonical() && RHS->isCanonical()); 3078 return LHS->getElementType() == RHS->getElementType() && 3079 LHS->getNumElements() == RHS->getNumElements(); 3080} 3081 3082//===----------------------------------------------------------------------===// 3083// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3084//===----------------------------------------------------------------------===// 3085 3086/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3087/// inheritance hierarchy of 'rProto'. 3088static bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3089 ObjCProtocolDecl *rProto) { 3090 if (lProto == rProto) 3091 return true; 3092 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3093 E = rProto->protocol_end(); PI != E; ++PI) 3094 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3095 return true; 3096 return false; 3097} 3098 3099/// ClassImplementsProtocol - Checks that 'lProto' protocol 3100/// has been implemented in IDecl class, its super class or categories (if 3101/// lookupCategory is true). 3102static bool ClassImplementsProtocol(ObjCProtocolDecl *lProto, 3103 ObjCInterfaceDecl *IDecl, 3104 bool lookupCategory, 3105 bool RHSIsQualifiedID = false) { 3106 3107 // 1st, look up the class. 3108 const ObjCList<ObjCProtocolDecl> &Protocols = 3109 IDecl->getReferencedProtocols(); 3110 3111 for (ObjCList<ObjCProtocolDecl>::iterator PI = Protocols.begin(), 3112 E = Protocols.end(); PI != E; ++PI) { 3113 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3114 return true; 3115 // This is dubious and is added to be compatible with gcc. In gcc, it is 3116 // also allowed assigning a protocol-qualified 'id' type to a LHS object 3117 // when protocol in qualified LHS is in list of protocols in the rhs 'id' 3118 // object. This IMO, should be a bug. 3119 // FIXME: Treat this as an extension, and flag this as an error when GCC 3120 // extensions are not enabled. 3121 if (RHSIsQualifiedID && ProtocolCompatibleWithProtocol(*PI, lProto)) 3122 return true; 3123 } 3124 3125 // 2nd, look up the category. 3126 if (lookupCategory) 3127 for (ObjCCategoryDecl *CDecl = IDecl->getCategoryList(); CDecl; 3128 CDecl = CDecl->getNextClassCategory()) { 3129 for (ObjCCategoryDecl::protocol_iterator PI = CDecl->protocol_begin(), 3130 E = CDecl->protocol_end(); PI != E; ++PI) 3131 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3132 return true; 3133 } 3134 3135 // 3rd, look up the super class(s) 3136 if (IDecl->getSuperClass()) 3137 return 3138 ClassImplementsProtocol(lProto, IDecl->getSuperClass(), lookupCategory, 3139 RHSIsQualifiedID); 3140 3141 return false; 3142} 3143 3144/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3145/// return true if lhs's protocols conform to rhs's protocol; false 3146/// otherwise. 3147bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3148 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3149 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3150 return false; 3151} 3152 3153/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3154/// ObjCQualifiedIDType. 3155bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 3156 bool compare) { 3157 // Allow id<P..> and an 'id' or void* type in all cases. 3158 if (lhs->isVoidPointerType() || 3159 lhs->isObjCIdType() || lhs->isObjCClassType()) 3160 return true; 3161 else if (rhs->isVoidPointerType() || 3162 rhs->isObjCIdType() || rhs->isObjCClassType()) 3163 return true; 3164 3165 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 3166 const ObjCObjectPointerType *rhsOPT = rhs->getAsObjCObjectPointerType(); 3167 3168 if (!rhsOPT) return false; 3169 3170 if (rhsOPT->qual_empty()) { 3171 // If the RHS is a unqualified interface pointer "NSString*", 3172 // make sure we check the class hierarchy. 3173 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 3174 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 3175 E = lhsQID->qual_end(); I != E; ++I) { 3176 // when comparing an id<P> on lhs with a static type on rhs, 3177 // see if static class implements all of id's protocols, directly or 3178 // through its super class and categories. 3179 if (!ClassImplementsProtocol(*I, rhsID, true)) 3180 return false; 3181 } 3182 } 3183 // If there are no qualifiers and no interface, we have an 'id'. 3184 return true; 3185 } 3186 // Both the right and left sides have qualifiers. 3187 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 3188 E = lhsQID->qual_end(); I != E; ++I) { 3189 ObjCProtocolDecl *lhsProto = *I; 3190 bool match = false; 3191 3192 // when comparing an id<P> on lhs with a static type on rhs, 3193 // see if static class implements all of id's protocols, directly or 3194 // through its super class and categories. 3195 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 3196 E = rhsOPT->qual_end(); J != E; ++J) { 3197 ObjCProtocolDecl *rhsProto = *J; 3198 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 3199 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 3200 match = true; 3201 break; 3202 } 3203 } 3204 // If the RHS is a qualified interface pointer "NSString<P>*", 3205 // make sure we check the class hierarchy. 3206 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 3207 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 3208 E = lhsQID->qual_end(); I != E; ++I) { 3209 // when comparing an id<P> on lhs with a static type on rhs, 3210 // see if static class implements all of id's protocols, directly or 3211 // through its super class and categories. 3212 if (ClassImplementsProtocol(*I, rhsID, true)) { 3213 match = true; 3214 break; 3215 } 3216 } 3217 } 3218 if (!match) 3219 return false; 3220 } 3221 3222 return true; 3223 } 3224 3225 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 3226 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 3227 3228 if (const ObjCObjectPointerType *lhsOPT = 3229 lhs->getAsObjCInterfacePointerType()) { 3230 if (lhsOPT->qual_empty()) { 3231 bool match = false; 3232 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 3233 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 3234 E = rhsQID->qual_end(); I != E; ++I) { 3235 // when comparing an id<P> on lhs with a static type on rhs, 3236 // see if static class implements all of id's protocols, directly or 3237 // through its super class and categories. 3238 if (ClassImplementsProtocol(*I, lhsID, true)) { 3239 match = true; 3240 break; 3241 } 3242 } 3243 if (!match) 3244 return false; 3245 } 3246 return true; 3247 } 3248 // Both the right and left sides have qualifiers. 3249 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 3250 E = lhsOPT->qual_end(); I != E; ++I) { 3251 ObjCProtocolDecl *lhsProto = *I; 3252 bool match = false; 3253 3254 // when comparing an id<P> on lhs with a static type on rhs, 3255 // see if static class implements all of id's protocols, directly or 3256 // through its super class and categories. 3257 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 3258 E = rhsQID->qual_end(); J != E; ++J) { 3259 ObjCProtocolDecl *rhsProto = *J; 3260 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 3261 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 3262 match = true; 3263 break; 3264 } 3265 } 3266 if (!match) 3267 return false; 3268 } 3269 return true; 3270 } 3271 return false; 3272} 3273 3274/// canAssignObjCInterfaces - Return true if the two interface types are 3275/// compatible for assignment from RHS to LHS. This handles validation of any 3276/// protocol qualifiers on the LHS or RHS. 3277/// 3278bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 3279 const ObjCObjectPointerType *RHSOPT) { 3280 // If either type represents the built-in 'id' or 'Class' types, return true. 3281 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 3282 return true; 3283 3284 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 3285 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 3286 QualType(RHSOPT,0), 3287 false); 3288 3289 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 3290 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 3291 if (LHS && RHS) // We have 2 user-defined types. 3292 return canAssignObjCInterfaces(LHS, RHS); 3293 3294 return false; 3295} 3296 3297bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 3298 const ObjCInterfaceType *RHS) { 3299 // Verify that the base decls are compatible: the RHS must be a subclass of 3300 // the LHS. 3301 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 3302 return false; 3303 3304 // RHS must have a superset of the protocols in the LHS. If the LHS is not 3305 // protocol qualified at all, then we are good. 3306 if (LHS->getNumProtocols() == 0) 3307 return true; 3308 3309 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 3310 // isn't a superset. 3311 if (RHS->getNumProtocols() == 0) 3312 return true; // FIXME: should return false! 3313 3314 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 3315 LHSPE = LHS->qual_end(); 3316 LHSPI != LHSPE; LHSPI++) { 3317 bool RHSImplementsProtocol = false; 3318 3319 // If the RHS doesn't implement the protocol on the left, the types 3320 // are incompatible. 3321 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 3322 RHSPE = RHS->qual_end(); 3323 RHSPI != RHSPE; RHSPI++) { 3324 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 3325 RHSImplementsProtocol = true; 3326 break; 3327 } 3328 } 3329 // FIXME: For better diagnostics, consider passing back the protocol name. 3330 if (!RHSImplementsProtocol) 3331 return false; 3332 } 3333 // The RHS implements all protocols listed on the LHS. 3334 return true; 3335} 3336 3337bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 3338 // get the "pointed to" types 3339 const ObjCObjectPointerType *LHSOPT = LHS->getAsObjCObjectPointerType(); 3340 const ObjCObjectPointerType *RHSOPT = RHS->getAsObjCObjectPointerType(); 3341 3342 if (!LHSOPT || !RHSOPT) 3343 return false; 3344 3345 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 3346 canAssignObjCInterfaces(RHSOPT, LHSOPT); 3347} 3348 3349/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 3350/// both shall have the identically qualified version of a compatible type. 3351/// C99 6.2.7p1: Two types have compatible types if their types are the 3352/// same. See 6.7.[2,3,5] for additional rules. 3353bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 3354 return !mergeTypes(LHS, RHS).isNull(); 3355} 3356 3357QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs) { 3358 const FunctionType *lbase = lhs->getAsFunctionType(); 3359 const FunctionType *rbase = rhs->getAsFunctionType(); 3360 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 3361 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 3362 bool allLTypes = true; 3363 bool allRTypes = true; 3364 3365 // Check return type 3366 QualType retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 3367 if (retType.isNull()) return QualType(); 3368 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 3369 allLTypes = false; 3370 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 3371 allRTypes = false; 3372 bool NoReturn = lbase->getNoReturnAttr() || rbase->getNoReturnAttr(); 3373 if (NoReturn != lbase->getNoReturnAttr()) 3374 allLTypes = false; 3375 if (NoReturn != rbase->getNoReturnAttr()) 3376 allRTypes = false; 3377 3378 if (lproto && rproto) { // two C99 style function prototypes 3379 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 3380 "C++ shouldn't be here"); 3381 unsigned lproto_nargs = lproto->getNumArgs(); 3382 unsigned rproto_nargs = rproto->getNumArgs(); 3383 3384 // Compatible functions must have the same number of arguments 3385 if (lproto_nargs != rproto_nargs) 3386 return QualType(); 3387 3388 // Variadic and non-variadic functions aren't compatible 3389 if (lproto->isVariadic() != rproto->isVariadic()) 3390 return QualType(); 3391 3392 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 3393 return QualType(); 3394 3395 // Check argument compatibility 3396 llvm::SmallVector<QualType, 10> types; 3397 for (unsigned i = 0; i < lproto_nargs; i++) { 3398 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 3399 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 3400 QualType argtype = mergeTypes(largtype, rargtype); 3401 if (argtype.isNull()) return QualType(); 3402 types.push_back(argtype); 3403 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 3404 allLTypes = false; 3405 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 3406 allRTypes = false; 3407 } 3408 if (allLTypes) return lhs; 3409 if (allRTypes) return rhs; 3410 return getFunctionType(retType, types.begin(), types.size(), 3411 lproto->isVariadic(), lproto->getTypeQuals(), 3412 NoReturn); 3413 } 3414 3415 if (lproto) allRTypes = false; 3416 if (rproto) allLTypes = false; 3417 3418 const FunctionProtoType *proto = lproto ? lproto : rproto; 3419 if (proto) { 3420 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 3421 if (proto->isVariadic()) return QualType(); 3422 // Check that the types are compatible with the types that 3423 // would result from default argument promotions (C99 6.7.5.3p15). 3424 // The only types actually affected are promotable integer 3425 // types and floats, which would be passed as a different 3426 // type depending on whether the prototype is visible. 3427 unsigned proto_nargs = proto->getNumArgs(); 3428 for (unsigned i = 0; i < proto_nargs; ++i) { 3429 QualType argTy = proto->getArgType(i); 3430 if (argTy->isPromotableIntegerType() || 3431 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 3432 return QualType(); 3433 } 3434 3435 if (allLTypes) return lhs; 3436 if (allRTypes) return rhs; 3437 return getFunctionType(retType, proto->arg_type_begin(), 3438 proto->getNumArgs(), lproto->isVariadic(), 3439 lproto->getTypeQuals(), NoReturn); 3440 } 3441 3442 if (allLTypes) return lhs; 3443 if (allRTypes) return rhs; 3444 return getFunctionNoProtoType(retType, NoReturn); 3445} 3446 3447QualType ASTContext::mergeTypes(QualType LHS, QualType RHS) { 3448 // C++ [expr]: If an expression initially has the type "reference to T", the 3449 // type is adjusted to "T" prior to any further analysis, the expression 3450 // designates the object or function denoted by the reference, and the 3451 // expression is an lvalue unless the reference is an rvalue reference and 3452 // the expression is a function call (possibly inside parentheses). 3453 // FIXME: C++ shouldn't be going through here! The rules are different 3454 // enough that they should be handled separately. 3455 // FIXME: Merging of lvalue and rvalue references is incorrect. C++ *really* 3456 // shouldn't be going through here! 3457 if (const ReferenceType *RT = LHS->getAsReferenceType()) 3458 LHS = RT->getPointeeType(); 3459 if (const ReferenceType *RT = RHS->getAsReferenceType()) 3460 RHS = RT->getPointeeType(); 3461 3462 QualType LHSCan = getCanonicalType(LHS), 3463 RHSCan = getCanonicalType(RHS); 3464 3465 // If two types are identical, they are compatible. 3466 if (LHSCan == RHSCan) 3467 return LHS; 3468 3469 // If the qualifiers are different, the types aren't compatible 3470 // Note that we handle extended qualifiers later, in the 3471 // case for ExtQualType. 3472 if (LHSCan.getCVRQualifiers() != RHSCan.getCVRQualifiers()) 3473 return QualType(); 3474 3475 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 3476 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 3477 3478 // We want to consider the two function types to be the same for these 3479 // comparisons, just force one to the other. 3480 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 3481 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 3482 3483 // Strip off objc_gc attributes off the top level so they can be merged. 3484 // This is a complete mess, but the attribute itself doesn't make much sense. 3485 if (RHSClass == Type::ExtQual) { 3486 QualType::GCAttrTypes GCAttr = RHSCan.getObjCGCAttr(); 3487 if (GCAttr != QualType::GCNone) { 3488 QualType::GCAttrTypes GCLHSAttr = LHSCan.getObjCGCAttr(); 3489 // __weak attribute must appear on both declarations. 3490 // __strong attribue is redundant if other decl is an objective-c 3491 // object pointer (or decorated with __strong attribute); otherwise 3492 // issue error. 3493 if ((GCAttr == QualType::Weak && GCLHSAttr != GCAttr) || 3494 (GCAttr == QualType::Strong && GCLHSAttr != GCAttr && 3495 !LHSCan->isObjCObjectPointerType())) 3496 return QualType(); 3497 3498 RHS = QualType(cast<ExtQualType>(RHS.getDesugaredType())->getBaseType(), 3499 RHS.getCVRQualifiers()); 3500 QualType Result = mergeTypes(LHS, RHS); 3501 if (!Result.isNull()) { 3502 if (Result.getObjCGCAttr() == QualType::GCNone) 3503 Result = getObjCGCQualType(Result, GCAttr); 3504 else if (Result.getObjCGCAttr() != GCAttr) 3505 Result = QualType(); 3506 } 3507 return Result; 3508 } 3509 } 3510 if (LHSClass == Type::ExtQual) { 3511 QualType::GCAttrTypes GCAttr = LHSCan.getObjCGCAttr(); 3512 if (GCAttr != QualType::GCNone) { 3513 QualType::GCAttrTypes GCRHSAttr = RHSCan.getObjCGCAttr(); 3514 // __weak attribute must appear on both declarations. __strong 3515 // __strong attribue is redundant if other decl is an objective-c 3516 // object pointer (or decorated with __strong attribute); otherwise 3517 // issue error. 3518 if ((GCAttr == QualType::Weak && GCRHSAttr != GCAttr) || 3519 (GCAttr == QualType::Strong && GCRHSAttr != GCAttr && 3520 !RHSCan->isObjCObjectPointerType())) 3521 return QualType(); 3522 3523 LHS = QualType(cast<ExtQualType>(LHS.getDesugaredType())->getBaseType(), 3524 LHS.getCVRQualifiers()); 3525 QualType Result = mergeTypes(LHS, RHS); 3526 if (!Result.isNull()) { 3527 if (Result.getObjCGCAttr() == QualType::GCNone) 3528 Result = getObjCGCQualType(Result, GCAttr); 3529 else if (Result.getObjCGCAttr() != GCAttr) 3530 Result = QualType(); 3531 } 3532 return Result; 3533 } 3534 } 3535 3536 // Same as above for arrays 3537 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 3538 LHSClass = Type::ConstantArray; 3539 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 3540 RHSClass = Type::ConstantArray; 3541 3542 // Canonicalize ExtVector -> Vector. 3543 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 3544 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 3545 3546 // If the canonical type classes don't match. 3547 if (LHSClass != RHSClass) { 3548 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 3549 // a signed integer type, or an unsigned integer type. 3550 if (const EnumType* ETy = LHS->getAsEnumType()) { 3551 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 3552 return RHS; 3553 } 3554 if (const EnumType* ETy = RHS->getAsEnumType()) { 3555 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 3556 return LHS; 3557 } 3558 3559 return QualType(); 3560 } 3561 3562 // The canonical type classes match. 3563 switch (LHSClass) { 3564#define TYPE(Class, Base) 3565#define ABSTRACT_TYPE(Class, Base) 3566#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 3567#define DEPENDENT_TYPE(Class, Base) case Type::Class: 3568#include "clang/AST/TypeNodes.def" 3569 assert(false && "Non-canonical and dependent types shouldn't get here"); 3570 return QualType(); 3571 3572 case Type::LValueReference: 3573 case Type::RValueReference: 3574 case Type::MemberPointer: 3575 assert(false && "C++ should never be in mergeTypes"); 3576 return QualType(); 3577 3578 case Type::IncompleteArray: 3579 case Type::VariableArray: 3580 case Type::FunctionProto: 3581 case Type::ExtVector: 3582 assert(false && "Types are eliminated above"); 3583 return QualType(); 3584 3585 case Type::Pointer: 3586 { 3587 // Merge two pointer types, while trying to preserve typedef info 3588 QualType LHSPointee = LHS->getAsPointerType()->getPointeeType(); 3589 QualType RHSPointee = RHS->getAsPointerType()->getPointeeType(); 3590 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 3591 if (ResultType.isNull()) return QualType(); 3592 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 3593 return LHS; 3594 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 3595 return RHS; 3596 return getPointerType(ResultType); 3597 } 3598 case Type::BlockPointer: 3599 { 3600 // Merge two block pointer types, while trying to preserve typedef info 3601 QualType LHSPointee = LHS->getAsBlockPointerType()->getPointeeType(); 3602 QualType RHSPointee = RHS->getAsBlockPointerType()->getPointeeType(); 3603 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 3604 if (ResultType.isNull()) return QualType(); 3605 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 3606 return LHS; 3607 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 3608 return RHS; 3609 return getBlockPointerType(ResultType); 3610 } 3611 case Type::ConstantArray: 3612 { 3613 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 3614 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 3615 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 3616 return QualType(); 3617 3618 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 3619 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 3620 QualType ResultType = mergeTypes(LHSElem, RHSElem); 3621 if (ResultType.isNull()) return QualType(); 3622 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 3623 return LHS; 3624 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 3625 return RHS; 3626 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 3627 ArrayType::ArraySizeModifier(), 0); 3628 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 3629 ArrayType::ArraySizeModifier(), 0); 3630 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 3631 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 3632 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 3633 return LHS; 3634 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 3635 return RHS; 3636 if (LVAT) { 3637 // FIXME: This isn't correct! But tricky to implement because 3638 // the array's size has to be the size of LHS, but the type 3639 // has to be different. 3640 return LHS; 3641 } 3642 if (RVAT) { 3643 // FIXME: This isn't correct! But tricky to implement because 3644 // the array's size has to be the size of RHS, but the type 3645 // has to be different. 3646 return RHS; 3647 } 3648 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 3649 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 3650 return getIncompleteArrayType(ResultType, 3651 ArrayType::ArraySizeModifier(), 0); 3652 } 3653 case Type::FunctionNoProto: 3654 return mergeFunctionTypes(LHS, RHS); 3655 case Type::Record: 3656 case Type::Enum: 3657 return QualType(); 3658 case Type::Builtin: 3659 // Only exactly equal builtin types are compatible, which is tested above. 3660 return QualType(); 3661 case Type::Complex: 3662 // Distinct complex types are incompatible. 3663 return QualType(); 3664 case Type::Vector: 3665 // FIXME: The merged type should be an ExtVector! 3666 if (areCompatVectorTypes(LHS->getAsVectorType(), RHS->getAsVectorType())) 3667 return LHS; 3668 return QualType(); 3669 case Type::ObjCInterface: { 3670 // Check if the interfaces are assignment compatible. 3671 // FIXME: This should be type compatibility, e.g. whether 3672 // "LHS x; RHS x;" at global scope is legal. 3673 const ObjCInterfaceType* LHSIface = LHS->getAsObjCInterfaceType(); 3674 const ObjCInterfaceType* RHSIface = RHS->getAsObjCInterfaceType(); 3675 if (LHSIface && RHSIface && 3676 canAssignObjCInterfaces(LHSIface, RHSIface)) 3677 return LHS; 3678 3679 return QualType(); 3680 } 3681 case Type::ObjCObjectPointer: { 3682 if (canAssignObjCInterfaces(LHS->getAsObjCObjectPointerType(), 3683 RHS->getAsObjCObjectPointerType())) 3684 return LHS; 3685 3686 return QualType(); 3687 } 3688 case Type::FixedWidthInt: 3689 // Distinct fixed-width integers are not compatible. 3690 return QualType(); 3691 case Type::ExtQual: 3692 // FIXME: ExtQual types can be compatible even if they're not 3693 // identical! 3694 return QualType(); 3695 // First attempt at an implementation, but I'm not really sure it's 3696 // right... 3697#if 0 3698 ExtQualType* LQual = cast<ExtQualType>(LHSCan); 3699 ExtQualType* RQual = cast<ExtQualType>(RHSCan); 3700 if (LQual->getAddressSpace() != RQual->getAddressSpace() || 3701 LQual->getObjCGCAttr() != RQual->getObjCGCAttr()) 3702 return QualType(); 3703 QualType LHSBase, RHSBase, ResultType, ResCanUnqual; 3704 LHSBase = QualType(LQual->getBaseType(), 0); 3705 RHSBase = QualType(RQual->getBaseType(), 0); 3706 ResultType = mergeTypes(LHSBase, RHSBase); 3707 if (ResultType.isNull()) return QualType(); 3708 ResCanUnqual = getCanonicalType(ResultType).getUnqualifiedType(); 3709 if (LHSCan.getUnqualifiedType() == ResCanUnqual) 3710 return LHS; 3711 if (RHSCan.getUnqualifiedType() == ResCanUnqual) 3712 return RHS; 3713 ResultType = getAddrSpaceQualType(ResultType, LQual->getAddressSpace()); 3714 ResultType = getObjCGCQualType(ResultType, LQual->getObjCGCAttr()); 3715 ResultType.setCVRQualifiers(LHSCan.getCVRQualifiers()); 3716 return ResultType; 3717#endif 3718 3719 case Type::TemplateSpecialization: 3720 assert(false && "Dependent types have no size"); 3721 break; 3722 } 3723 3724 return QualType(); 3725} 3726 3727//===----------------------------------------------------------------------===// 3728// Integer Predicates 3729//===----------------------------------------------------------------------===// 3730 3731unsigned ASTContext::getIntWidth(QualType T) { 3732 if (T == BoolTy) 3733 return 1; 3734 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) { 3735 return FWIT->getWidth(); 3736 } 3737 // For builtin types, just use the standard type sizing method 3738 return (unsigned)getTypeSize(T); 3739} 3740 3741QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 3742 assert(T->isSignedIntegerType() && "Unexpected type"); 3743 if (const EnumType* ETy = T->getAsEnumType()) 3744 T = ETy->getDecl()->getIntegerType(); 3745 const BuiltinType* BTy = T->getAsBuiltinType(); 3746 assert (BTy && "Unexpected signed integer type"); 3747 switch (BTy->getKind()) { 3748 case BuiltinType::Char_S: 3749 case BuiltinType::SChar: 3750 return UnsignedCharTy; 3751 case BuiltinType::Short: 3752 return UnsignedShortTy; 3753 case BuiltinType::Int: 3754 return UnsignedIntTy; 3755 case BuiltinType::Long: 3756 return UnsignedLongTy; 3757 case BuiltinType::LongLong: 3758 return UnsignedLongLongTy; 3759 case BuiltinType::Int128: 3760 return UnsignedInt128Ty; 3761 default: 3762 assert(0 && "Unexpected signed integer type"); 3763 return QualType(); 3764 } 3765} 3766 3767ExternalASTSource::~ExternalASTSource() { } 3768 3769void ExternalASTSource::PrintStats() { } 3770 3771 3772//===----------------------------------------------------------------------===// 3773// Builtin Type Computation 3774//===----------------------------------------------------------------------===// 3775 3776/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 3777/// pointer over the consumed characters. This returns the resultant type. 3778static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 3779 ASTContext::GetBuiltinTypeError &Error, 3780 bool AllowTypeModifiers = true) { 3781 // Modifiers. 3782 int HowLong = 0; 3783 bool Signed = false, Unsigned = false; 3784 3785 // Read the modifiers first. 3786 bool Done = false; 3787 while (!Done) { 3788 switch (*Str++) { 3789 default: Done = true; --Str; break; 3790 case 'S': 3791 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 3792 assert(!Signed && "Can't use 'S' modifier multiple times!"); 3793 Signed = true; 3794 break; 3795 case 'U': 3796 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 3797 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 3798 Unsigned = true; 3799 break; 3800 case 'L': 3801 assert(HowLong <= 2 && "Can't have LLLL modifier"); 3802 ++HowLong; 3803 break; 3804 } 3805 } 3806 3807 QualType Type; 3808 3809 // Read the base type. 3810 switch (*Str++) { 3811 default: assert(0 && "Unknown builtin type letter!"); 3812 case 'v': 3813 assert(HowLong == 0 && !Signed && !Unsigned && 3814 "Bad modifiers used with 'v'!"); 3815 Type = Context.VoidTy; 3816 break; 3817 case 'f': 3818 assert(HowLong == 0 && !Signed && !Unsigned && 3819 "Bad modifiers used with 'f'!"); 3820 Type = Context.FloatTy; 3821 break; 3822 case 'd': 3823 assert(HowLong < 2 && !Signed && !Unsigned && 3824 "Bad modifiers used with 'd'!"); 3825 if (HowLong) 3826 Type = Context.LongDoubleTy; 3827 else 3828 Type = Context.DoubleTy; 3829 break; 3830 case 's': 3831 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 3832 if (Unsigned) 3833 Type = Context.UnsignedShortTy; 3834 else 3835 Type = Context.ShortTy; 3836 break; 3837 case 'i': 3838 if (HowLong == 3) 3839 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 3840 else if (HowLong == 2) 3841 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 3842 else if (HowLong == 1) 3843 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 3844 else 3845 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 3846 break; 3847 case 'c': 3848 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 3849 if (Signed) 3850 Type = Context.SignedCharTy; 3851 else if (Unsigned) 3852 Type = Context.UnsignedCharTy; 3853 else 3854 Type = Context.CharTy; 3855 break; 3856 case 'b': // boolean 3857 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 3858 Type = Context.BoolTy; 3859 break; 3860 case 'z': // size_t. 3861 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 3862 Type = Context.getSizeType(); 3863 break; 3864 case 'F': 3865 Type = Context.getCFConstantStringType(); 3866 break; 3867 case 'a': 3868 Type = Context.getBuiltinVaListType(); 3869 assert(!Type.isNull() && "builtin va list type not initialized!"); 3870 break; 3871 case 'A': 3872 // This is a "reference" to a va_list; however, what exactly 3873 // this means depends on how va_list is defined. There are two 3874 // different kinds of va_list: ones passed by value, and ones 3875 // passed by reference. An example of a by-value va_list is 3876 // x86, where va_list is a char*. An example of by-ref va_list 3877 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 3878 // we want this argument to be a char*&; for x86-64, we want 3879 // it to be a __va_list_tag*. 3880 Type = Context.getBuiltinVaListType(); 3881 assert(!Type.isNull() && "builtin va list type not initialized!"); 3882 if (Type->isArrayType()) { 3883 Type = Context.getArrayDecayedType(Type); 3884 } else { 3885 Type = Context.getLValueReferenceType(Type); 3886 } 3887 break; 3888 case 'V': { 3889 char *End; 3890 3891 unsigned NumElements = strtoul(Str, &End, 10); 3892 assert(End != Str && "Missing vector size"); 3893 3894 Str = End; 3895 3896 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 3897 Type = Context.getVectorType(ElementType, NumElements); 3898 break; 3899 } 3900 case 'P': { 3901 Type = Context.getFILEType(); 3902 if (Type.isNull()) { 3903 Error = ASTContext::GE_Missing_FILE; 3904 return QualType(); 3905 } else { 3906 break; 3907 } 3908 } 3909 } 3910 3911 if (!AllowTypeModifiers) 3912 return Type; 3913 3914 Done = false; 3915 while (!Done) { 3916 switch (*Str++) { 3917 default: Done = true; --Str; break; 3918 case '*': 3919 Type = Context.getPointerType(Type); 3920 break; 3921 case '&': 3922 Type = Context.getLValueReferenceType(Type); 3923 break; 3924 // FIXME: There's no way to have a built-in with an rvalue ref arg. 3925 case 'C': 3926 Type = Type.getQualifiedType(QualType::Const); 3927 break; 3928 } 3929 } 3930 3931 return Type; 3932} 3933 3934/// GetBuiltinType - Return the type for the specified builtin. 3935QualType ASTContext::GetBuiltinType(unsigned id, 3936 GetBuiltinTypeError &Error) { 3937 const char *TypeStr = BuiltinInfo.GetTypeString(id); 3938 3939 llvm::SmallVector<QualType, 8> ArgTypes; 3940 3941 Error = GE_None; 3942 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 3943 if (Error != GE_None) 3944 return QualType(); 3945 while (TypeStr[0] && TypeStr[0] != '.') { 3946 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 3947 if (Error != GE_None) 3948 return QualType(); 3949 3950 // Do array -> pointer decay. The builtin should use the decayed type. 3951 if (Ty->isArrayType()) 3952 Ty = getArrayDecayedType(Ty); 3953 3954 ArgTypes.push_back(Ty); 3955 } 3956 3957 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 3958 "'.' should only occur at end of builtin type list!"); 3959 3960 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 3961 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 3962 return getFunctionNoProtoType(ResType); 3963 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 3964 TypeStr[0] == '.', 0); 3965} 3966