ASTContext.cpp revision 3a4d98341a3b016f6bf2559dde5f3d9d8bf5f358
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 223namespace { 224 class BeforeInTranslationUnit 225 : std::binary_function<SourceRange, SourceRange, bool> { 226 SourceManager *SourceMgr; 227 228 public: 229 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 230 231 bool operator()(SourceRange X, SourceRange Y) { 232 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 233 } 234 }; 235} 236 237/// \brief Determine whether the given comment is a Doxygen-style comment. 238/// 239/// \param Start the start of the comment text. 240/// 241/// \param End the end of the comment text. 242/// 243/// \param Member whether we want to check whether this is a member comment 244/// (which requires a < after the Doxygen-comment delimiter). Otherwise, 245/// we only return true when we find a non-member comment. 246static bool 247isDoxygenComment(SourceManager &SourceMgr, SourceRange Comment, 248 bool Member = false) { 249 const char *BufferStart 250 = SourceMgr.getBufferData(SourceMgr.getFileID(Comment.getBegin())).first; 251 const char *Start = BufferStart + SourceMgr.getFileOffset(Comment.getBegin()); 252 const char* End = BufferStart + SourceMgr.getFileOffset(Comment.getEnd()); 253 254 if (End - Start < 4) 255 return false; 256 257 assert(Start[0] == '/' && "Not a comment?"); 258 if (Start[1] == '*' && !(Start[2] == '!' || Start[2] == '*')) 259 return false; 260 if (Start[1] == '/' && !(Start[2] == '!' || Start[2] == '/')) 261 return false; 262 263 return (Start[3] == '<') == Member; 264} 265 266/// \brief Retrieve the comment associated with the given declaration, if 267/// it has one. 268const char *ASTContext::getCommentForDecl(const Decl *D) { 269 if (!D) 270 return 0; 271 272 // Check whether we have cached a comment string for this declaration 273 // already. 274 llvm::DenseMap<const Decl *, std::string>::iterator Pos 275 = DeclComments.find(D); 276 if (Pos != DeclComments.end()) 277 return Pos->second.c_str(); 278 279 // If we have an external AST source and have not yet loaded comments from 280 // that source, do so now. 281 if (ExternalSource && !LoadedExternalComments) { 282 std::vector<SourceRange> LoadedComments; 283 ExternalSource->ReadComments(LoadedComments); 284 285 if (!LoadedComments.empty()) 286 Comments.insert(Comments.begin(), LoadedComments.begin(), 287 LoadedComments.end()); 288 289 LoadedExternalComments = true; 290 } 291 292 // If there are no comments anywhere, we won't find anything. 293 if (Comments.empty()) 294 return 0; 295 296 // If the declaration doesn't map directly to a location in a file, we 297 // can't find the comment. 298 SourceLocation DeclStartLoc = D->getLocStart(); 299 if (DeclStartLoc.isInvalid() || !DeclStartLoc.isFileID()) 300 return 0; 301 302 // Find the comment that occurs just before this declaration. 303 std::vector<SourceRange>::iterator LastComment 304 = std::lower_bound(Comments.begin(), Comments.end(), 305 SourceRange(DeclStartLoc), 306 BeforeInTranslationUnit(&SourceMgr)); 307 308 // Decompose the location for the start of the declaration and find the 309 // beginning of the file buffer. 310 std::pair<FileID, unsigned> DeclStartDecomp 311 = SourceMgr.getDecomposedLoc(DeclStartLoc); 312 const char *FileBufferStart 313 = SourceMgr.getBufferData(DeclStartDecomp.first).first; 314 315 // First check whether we have a comment for a member. 316 if (LastComment != Comments.end() && 317 !isa<TagDecl>(D) && !isa<NamespaceDecl>(D) && 318 isDoxygenComment(SourceMgr, *LastComment, true)) { 319 std::pair<FileID, unsigned> LastCommentEndDecomp 320 = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 321 if (DeclStartDecomp.first == LastCommentEndDecomp.first && 322 SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second) 323 == SourceMgr.getLineNumber(LastCommentEndDecomp.first, 324 LastCommentEndDecomp.second)) { 325 // The Doxygen member comment comes after the declaration starts and 326 // is on the same line and in the same file as the declaration. This 327 // is the comment we want. 328 std::string &Result = DeclComments[D]; 329 Result.append(FileBufferStart + 330 SourceMgr.getFileOffset(LastComment->getBegin()), 331 FileBufferStart + LastCommentEndDecomp.second + 1); 332 return Result.c_str(); 333 } 334 } 335 336 if (LastComment == Comments.begin()) 337 return 0; 338 --LastComment; 339 340 // Decompose the end of the comment. 341 std::pair<FileID, unsigned> LastCommentEndDecomp 342 = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 343 344 // If the comment and the declaration aren't in the same file, then they 345 // aren't related. 346 if (DeclStartDecomp.first != LastCommentEndDecomp.first) 347 return 0; 348 349 // Check that we actually have a Doxygen comment. 350 if (!isDoxygenComment(SourceMgr, *LastComment)) 351 return 0; 352 353 // Compute the starting line for the declaration and for the end of the 354 // comment (this is expensive). 355 unsigned DeclStartLine 356 = SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second); 357 unsigned CommentEndLine 358 = SourceMgr.getLineNumber(LastCommentEndDecomp.first, 359 LastCommentEndDecomp.second); 360 361 // If the comment does not end on the line prior to the declaration, then 362 // the comment is not associated with the declaration at all. 363 if (CommentEndLine + 1 != DeclStartLine) 364 return 0; 365 366 // We have a comment, but there may be more comments on the previous lines. 367 // Keep looking so long as the comments are still Doxygen comments and are 368 // still adjacent. 369 unsigned ExpectedLine 370 = SourceMgr.getSpellingLineNumber(LastComment->getBegin()) - 1; 371 std::vector<SourceRange>::iterator FirstComment = LastComment; 372 while (FirstComment != Comments.begin()) { 373 // Look at the previous comment 374 --FirstComment; 375 std::pair<FileID, unsigned> Decomp 376 = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 377 378 // If this previous comment is in a different file, we're done. 379 if (Decomp.first != DeclStartDecomp.first) { 380 ++FirstComment; 381 break; 382 } 383 384 // If this comment is not a Doxygen comment, we're done. 385 if (!isDoxygenComment(SourceMgr, *FirstComment)) { 386 ++FirstComment; 387 break; 388 } 389 390 // If the line number is not what we expected, we're done. 391 unsigned Line = SourceMgr.getLineNumber(Decomp.first, Decomp.second); 392 if (Line != ExpectedLine) { 393 ++FirstComment; 394 break; 395 } 396 397 // Set the next expected line number. 398 ExpectedLine 399 = SourceMgr.getSpellingLineNumber(FirstComment->getBegin()) - 1; 400 } 401 402 // The iterator range [FirstComment, LastComment] contains all of the 403 // BCPL comments that, together, are associated with this declaration. 404 // Form a single comment block string for this declaration that concatenates 405 // all of these comments. 406 std::string &Result = DeclComments[D]; 407 while (FirstComment != LastComment) { 408 std::pair<FileID, unsigned> DecompStart 409 = SourceMgr.getDecomposedLoc(FirstComment->getBegin()); 410 std::pair<FileID, unsigned> DecompEnd 411 = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 412 Result.append(FileBufferStart + DecompStart.second, 413 FileBufferStart + DecompEnd.second + 1); 414 ++FirstComment; 415 } 416 417 // Append the last comment line. 418 Result.append(FileBufferStart + 419 SourceMgr.getFileOffset(LastComment->getBegin()), 420 FileBufferStart + LastCommentEndDecomp.second + 1); 421 return Result.c_str(); 422} 423 424//===----------------------------------------------------------------------===// 425// Type Sizing and Analysis 426//===----------------------------------------------------------------------===// 427 428/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 429/// scalar floating point type. 430const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 431 const BuiltinType *BT = T->getAsBuiltinType(); 432 assert(BT && "Not a floating point type!"); 433 switch (BT->getKind()) { 434 default: assert(0 && "Not a floating point type!"); 435 case BuiltinType::Float: return Target.getFloatFormat(); 436 case BuiltinType::Double: return Target.getDoubleFormat(); 437 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 438 } 439} 440 441/// getDeclAlign - Return a conservative estimate of the alignment of the 442/// specified decl. Note that bitfields do not have a valid alignment, so 443/// this method will assert on them. 444unsigned ASTContext::getDeclAlignInBytes(const Decl *D) { 445 unsigned Align = Target.getCharWidth(); 446 447 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 448 Align = std::max(Align, AA->getAlignment()); 449 450 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 451 QualType T = VD->getType(); 452 if (const ReferenceType* RT = T->getAsReferenceType()) { 453 unsigned AS = RT->getPointeeType().getAddressSpace(); 454 Align = Target.getPointerAlign(AS); 455 } else if (!T->isIncompleteType() && !T->isFunctionType()) { 456 // Incomplete or function types default to 1. 457 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 458 T = cast<ArrayType>(T)->getElementType(); 459 460 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 461 } 462 } 463 464 return Align / Target.getCharWidth(); 465} 466 467/// getTypeSize - Return the size of the specified type, in bits. This method 468/// does not work on incomplete types. 469std::pair<uint64_t, unsigned> 470ASTContext::getTypeInfo(const Type *T) { 471 uint64_t Width=0; 472 unsigned Align=8; 473 switch (T->getTypeClass()) { 474#define TYPE(Class, Base) 475#define ABSTRACT_TYPE(Class, Base) 476#define NON_CANONICAL_TYPE(Class, Base) 477#define DEPENDENT_TYPE(Class, Base) case Type::Class: 478#include "clang/AST/TypeNodes.def" 479 assert(false && "Should not see dependent types"); 480 break; 481 482 case Type::FunctionNoProto: 483 case Type::FunctionProto: 484 // GCC extension: alignof(function) = 32 bits 485 Width = 0; 486 Align = 32; 487 break; 488 489 case Type::IncompleteArray: 490 case Type::VariableArray: 491 Width = 0; 492 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 493 break; 494 495 case Type::ConstantArrayWithExpr: 496 case Type::ConstantArrayWithoutExpr: 497 case Type::ConstantArray: { 498 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 499 500 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 501 Width = EltInfo.first*CAT->getSize().getZExtValue(); 502 Align = EltInfo.second; 503 break; 504 } 505 case Type::ExtVector: 506 case Type::Vector: { 507 std::pair<uint64_t, unsigned> EltInfo = 508 getTypeInfo(cast<VectorType>(T)->getElementType()); 509 Width = EltInfo.first*cast<VectorType>(T)->getNumElements(); 510 Align = Width; 511 // If the alignment is not a power of 2, round up to the next power of 2. 512 // This happens for non-power-of-2 length vectors. 513 // FIXME: this should probably be a target property. 514 Align = 1 << llvm::Log2_32_Ceil(Align); 515 break; 516 } 517 518 case Type::Builtin: 519 switch (cast<BuiltinType>(T)->getKind()) { 520 default: assert(0 && "Unknown builtin type!"); 521 case BuiltinType::Void: 522 // GCC extension: alignof(void) = 8 bits. 523 Width = 0; 524 Align = 8; 525 break; 526 527 case BuiltinType::Bool: 528 Width = Target.getBoolWidth(); 529 Align = Target.getBoolAlign(); 530 break; 531 case BuiltinType::Char_S: 532 case BuiltinType::Char_U: 533 case BuiltinType::UChar: 534 case BuiltinType::SChar: 535 Width = Target.getCharWidth(); 536 Align = Target.getCharAlign(); 537 break; 538 case BuiltinType::WChar: 539 Width = Target.getWCharWidth(); 540 Align = Target.getWCharAlign(); 541 break; 542 case BuiltinType::Char16: 543 Width = Target.getChar16Width(); 544 Align = Target.getChar16Align(); 545 break; 546 case BuiltinType::Char32: 547 Width = Target.getChar32Width(); 548 Align = Target.getChar32Align(); 549 break; 550 case BuiltinType::UShort: 551 case BuiltinType::Short: 552 Width = Target.getShortWidth(); 553 Align = Target.getShortAlign(); 554 break; 555 case BuiltinType::UInt: 556 case BuiltinType::Int: 557 Width = Target.getIntWidth(); 558 Align = Target.getIntAlign(); 559 break; 560 case BuiltinType::ULong: 561 case BuiltinType::Long: 562 Width = Target.getLongWidth(); 563 Align = Target.getLongAlign(); 564 break; 565 case BuiltinType::ULongLong: 566 case BuiltinType::LongLong: 567 Width = Target.getLongLongWidth(); 568 Align = Target.getLongLongAlign(); 569 break; 570 case BuiltinType::Int128: 571 case BuiltinType::UInt128: 572 Width = 128; 573 Align = 128; // int128_t is 128-bit aligned on all targets. 574 break; 575 case BuiltinType::Float: 576 Width = Target.getFloatWidth(); 577 Align = Target.getFloatAlign(); 578 break; 579 case BuiltinType::Double: 580 Width = Target.getDoubleWidth(); 581 Align = Target.getDoubleAlign(); 582 break; 583 case BuiltinType::LongDouble: 584 Width = Target.getLongDoubleWidth(); 585 Align = Target.getLongDoubleAlign(); 586 break; 587 case BuiltinType::NullPtr: 588 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 589 Align = Target.getPointerAlign(0); // == sizeof(void*) 590 break; 591 } 592 break; 593 case Type::FixedWidthInt: 594 // FIXME: This isn't precisely correct; the width/alignment should depend 595 // on the available types for the target 596 Width = cast<FixedWidthIntType>(T)->getWidth(); 597 Width = std::max(llvm::NextPowerOf2(Width - 1), (uint64_t)8); 598 Align = Width; 599 break; 600 case Type::ExtQual: 601 // FIXME: Pointers into different addr spaces could have different sizes and 602 // alignment requirements: getPointerInfo should take an AddrSpace. 603 return getTypeInfo(QualType(cast<ExtQualType>(T)->getBaseType(), 0)); 604 case Type::ObjCObjectPointer: 605 Width = Target.getPointerWidth(0); 606 Align = Target.getPointerAlign(0); 607 break; 608 case Type::BlockPointer: { 609 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 610 Width = Target.getPointerWidth(AS); 611 Align = Target.getPointerAlign(AS); 612 break; 613 } 614 case Type::Pointer: { 615 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 616 Width = Target.getPointerWidth(AS); 617 Align = Target.getPointerAlign(AS); 618 break; 619 } 620 case Type::LValueReference: 621 case Type::RValueReference: 622 // "When applied to a reference or a reference type, the result is the size 623 // of the referenced type." C++98 5.3.3p2: expr.sizeof. 624 // FIXME: This is wrong for struct layout: a reference in a struct has 625 // pointer size. 626 return getTypeInfo(cast<ReferenceType>(T)->getPointeeType()); 627 case Type::MemberPointer: { 628 // FIXME: This is ABI dependent. We use the Itanium C++ ABI. 629 // http://www.codesourcery.com/public/cxx-abi/abi.html#member-pointers 630 // If we ever want to support other ABIs this needs to be abstracted. 631 632 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 633 std::pair<uint64_t, unsigned> PtrDiffInfo = 634 getTypeInfo(getPointerDiffType()); 635 Width = PtrDiffInfo.first; 636 if (Pointee->isFunctionType()) 637 Width *= 2; 638 Align = PtrDiffInfo.second; 639 break; 640 } 641 case Type::Complex: { 642 // Complex types have the same alignment as their elements, but twice the 643 // size. 644 std::pair<uint64_t, unsigned> EltInfo = 645 getTypeInfo(cast<ComplexType>(T)->getElementType()); 646 Width = EltInfo.first*2; 647 Align = EltInfo.second; 648 break; 649 } 650 case Type::ObjCInterface: { 651 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 652 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 653 Width = Layout.getSize(); 654 Align = Layout.getAlignment(); 655 break; 656 } 657 case Type::Record: 658 case Type::Enum: { 659 const TagType *TT = cast<TagType>(T); 660 661 if (TT->getDecl()->isInvalidDecl()) { 662 Width = 1; 663 Align = 1; 664 break; 665 } 666 667 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 668 return getTypeInfo(ET->getDecl()->getIntegerType()); 669 670 const RecordType *RT = cast<RecordType>(TT); 671 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 672 Width = Layout.getSize(); 673 Align = Layout.getAlignment(); 674 break; 675 } 676 677 case Type::Typedef: { 678 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 679 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 680 Align = Aligned->getAlignment(); 681 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 682 } else 683 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 684 break; 685 } 686 687 case Type::TypeOfExpr: 688 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 689 .getTypePtr()); 690 691 case Type::TypeOf: 692 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 693 694 case Type::Decltype: 695 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 696 .getTypePtr()); 697 698 case Type::QualifiedName: 699 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 700 701 case Type::TemplateSpecialization: 702 assert(getCanonicalType(T) != T && 703 "Cannot request the size of a dependent type"); 704 // FIXME: this is likely to be wrong once we support template 705 // aliases, since a template alias could refer to a typedef that 706 // has an __aligned__ attribute on it. 707 return getTypeInfo(getCanonicalType(T)); 708 } 709 710 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 711 return std::make_pair(Width, Align); 712} 713 714/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 715/// type for the current target in bits. This can be different than the ABI 716/// alignment in cases where it is beneficial for performance to overalign 717/// a data type. 718unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 719 unsigned ABIAlign = getTypeAlign(T); 720 721 // Double and long long should be naturally aligned if possible. 722 if (const ComplexType* CT = T->getAsComplexType()) 723 T = CT->getElementType().getTypePtr(); 724 if (T->isSpecificBuiltinType(BuiltinType::Double) || 725 T->isSpecificBuiltinType(BuiltinType::LongLong)) 726 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 727 728 return ABIAlign; 729} 730 731static void CollectLocalObjCIvars(ASTContext *Ctx, 732 const ObjCInterfaceDecl *OI, 733 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 734 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 735 E = OI->ivar_end(); I != E; ++I) { 736 ObjCIvarDecl *IVDecl = *I; 737 if (!IVDecl->isInvalidDecl()) 738 Fields.push_back(cast<FieldDecl>(IVDecl)); 739 } 740} 741 742void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 743 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 744 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 745 CollectObjCIvars(SuperClass, Fields); 746 CollectLocalObjCIvars(this, OI, Fields); 747} 748 749/// ShallowCollectObjCIvars - 750/// Collect all ivars, including those synthesized, in the current class. 751/// 752void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 753 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars, 754 bool CollectSynthesized) { 755 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 756 E = OI->ivar_end(); I != E; ++I) { 757 Ivars.push_back(*I); 758 } 759 if (CollectSynthesized) 760 CollectSynthesizedIvars(OI, Ivars); 761} 762 763void ASTContext::CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 764 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 765 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 766 E = PD->prop_end(); I != E; ++I) 767 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 768 Ivars.push_back(Ivar); 769 770 // Also look into nested protocols. 771 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 772 E = PD->protocol_end(); P != E; ++P) 773 CollectProtocolSynthesizedIvars(*P, Ivars); 774} 775 776/// CollectSynthesizedIvars - 777/// This routine collect synthesized ivars for the designated class. 778/// 779void ASTContext::CollectSynthesizedIvars(const ObjCInterfaceDecl *OI, 780 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 781 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 782 E = OI->prop_end(); I != E; ++I) { 783 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 784 Ivars.push_back(Ivar); 785 } 786 // Also look into interface's protocol list for properties declared 787 // in the protocol and whose ivars are synthesized. 788 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 789 PE = OI->protocol_end(); P != PE; ++P) { 790 ObjCProtocolDecl *PD = (*P); 791 CollectProtocolSynthesizedIvars(PD, Ivars); 792 } 793} 794 795unsigned ASTContext::CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD) { 796 unsigned count = 0; 797 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 798 E = PD->prop_end(); I != E; ++I) 799 if ((*I)->getPropertyIvarDecl()) 800 ++count; 801 802 // Also look into nested protocols. 803 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 804 E = PD->protocol_end(); P != E; ++P) 805 count += CountProtocolSynthesizedIvars(*P); 806 return count; 807} 808 809unsigned ASTContext::CountSynthesizedIvars(const ObjCInterfaceDecl *OI) 810{ 811 unsigned count = 0; 812 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 813 E = OI->prop_end(); I != E; ++I) { 814 if ((*I)->getPropertyIvarDecl()) 815 ++count; 816 } 817 // Also look into interface's protocol list for properties declared 818 // in the protocol and whose ivars are synthesized. 819 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 820 PE = OI->protocol_end(); P != PE; ++P) { 821 ObjCProtocolDecl *PD = (*P); 822 count += CountProtocolSynthesizedIvars(PD); 823 } 824 return count; 825} 826 827/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 828ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 829 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 830 I = ObjCImpls.find(D); 831 if (I != ObjCImpls.end()) 832 return cast<ObjCImplementationDecl>(I->second); 833 return 0; 834} 835/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 836ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 837 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 838 I = ObjCImpls.find(D); 839 if (I != ObjCImpls.end()) 840 return cast<ObjCCategoryImplDecl>(I->second); 841 return 0; 842} 843 844/// \brief Set the implementation of ObjCInterfaceDecl. 845void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 846 ObjCImplementationDecl *ImplD) { 847 assert(IFaceD && ImplD && "Passed null params"); 848 ObjCImpls[IFaceD] = ImplD; 849} 850/// \brief Set the implementation of ObjCCategoryDecl. 851void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 852 ObjCCategoryImplDecl *ImplD) { 853 assert(CatD && ImplD && "Passed null params"); 854 ObjCImpls[CatD] = ImplD; 855} 856 857/// getInterfaceLayoutImpl - Get or compute information about the 858/// layout of the given interface. 859/// 860/// \param Impl - If given, also include the layout of the interface's 861/// implementation. This may differ by including synthesized ivars. 862const ASTRecordLayout & 863ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 864 const ObjCImplementationDecl *Impl) { 865 assert(!D->isForwardDecl() && "Invalid interface decl!"); 866 867 // Look up this layout, if already laid out, return what we have. 868 ObjCContainerDecl *Key = 869 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 870 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 871 return *Entry; 872 873 // Add in synthesized ivar count if laying out an implementation. 874 if (Impl) { 875 unsigned FieldCount = D->ivar_size(); 876 unsigned SynthCount = CountSynthesizedIvars(D); 877 FieldCount += SynthCount; 878 // If there aren't any sythesized ivars then reuse the interface 879 // entry. Note we can't cache this because we simply free all 880 // entries later; however we shouldn't look up implementations 881 // frequently. 882 if (SynthCount == 0) 883 return getObjCLayout(D, 0); 884 } 885 886 const ASTRecordLayout *NewEntry = 887 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 888 ObjCLayouts[Key] = NewEntry; 889 890 return *NewEntry; 891} 892 893const ASTRecordLayout & 894ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 895 return getObjCLayout(D, 0); 896} 897 898const ASTRecordLayout & 899ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 900 return getObjCLayout(D->getClassInterface(), D); 901} 902 903/// getASTRecordLayout - Get or compute information about the layout of the 904/// specified record (struct/union/class), which indicates its size and field 905/// position information. 906const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 907 D = D->getDefinition(*this); 908 assert(D && "Cannot get layout of forward declarations!"); 909 910 // Look up this layout, if already laid out, return what we have. 911 const ASTRecordLayout *&Entry = ASTRecordLayouts[D]; 912 if (Entry) return *Entry; 913 914 const ASTRecordLayout *NewEntry = 915 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 916 Entry = NewEntry; 917 918 return *NewEntry; 919} 920 921//===----------------------------------------------------------------------===// 922// Type creation/memoization methods 923//===----------------------------------------------------------------------===// 924 925QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 926 QualType CanT = getCanonicalType(T); 927 if (CanT.getAddressSpace() == AddressSpace) 928 return T; 929 930 // If we are composing extended qualifiers together, merge together into one 931 // ExtQualType node. 932 unsigned CVRQuals = T.getCVRQualifiers(); 933 QualType::GCAttrTypes GCAttr = QualType::GCNone; 934 Type *TypeNode = T.getTypePtr(); 935 936 if (ExtQualType *EQT = dyn_cast<ExtQualType>(TypeNode)) { 937 // If this type already has an address space specified, it cannot get 938 // another one. 939 assert(EQT->getAddressSpace() == 0 && 940 "Type cannot be in multiple addr spaces!"); 941 GCAttr = EQT->getObjCGCAttr(); 942 TypeNode = EQT->getBaseType(); 943 } 944 945 // Check if we've already instantiated this type. 946 llvm::FoldingSetNodeID ID; 947 ExtQualType::Profile(ID, TypeNode, AddressSpace, GCAttr); 948 void *InsertPos = 0; 949 if (ExtQualType *EXTQy = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos)) 950 return QualType(EXTQy, CVRQuals); 951 952 // If the base type isn't canonical, this won't be a canonical type either, 953 // so fill in the canonical type field. 954 QualType Canonical; 955 if (!TypeNode->isCanonical()) { 956 Canonical = getAddrSpaceQualType(CanT, AddressSpace); 957 958 // Update InsertPos, the previous call could have invalidated it. 959 ExtQualType *NewIP = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos); 960 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 961 } 962 ExtQualType *New = 963 new (*this, 8) ExtQualType(TypeNode, Canonical, AddressSpace, GCAttr); 964 ExtQualTypes.InsertNode(New, InsertPos); 965 Types.push_back(New); 966 return QualType(New, CVRQuals); 967} 968 969QualType ASTContext::getObjCGCQualType(QualType T, 970 QualType::GCAttrTypes GCAttr) { 971 QualType CanT = getCanonicalType(T); 972 if (CanT.getObjCGCAttr() == GCAttr) 973 return T; 974 975 if (T->isPointerType()) { 976 QualType Pointee = T->getAsPointerType()->getPointeeType(); 977 if (Pointee->isAnyPointerType()) { 978 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 979 return getPointerType(ResultType); 980 } 981 } 982 // If we are composing extended qualifiers together, merge together into one 983 // ExtQualType node. 984 unsigned CVRQuals = T.getCVRQualifiers(); 985 Type *TypeNode = T.getTypePtr(); 986 unsigned AddressSpace = 0; 987 988 if (ExtQualType *EQT = dyn_cast<ExtQualType>(TypeNode)) { 989 // If this type already has an address space specified, it cannot get 990 // another one. 991 assert(EQT->getObjCGCAttr() == QualType::GCNone && 992 "Type cannot be in multiple addr spaces!"); 993 AddressSpace = EQT->getAddressSpace(); 994 TypeNode = EQT->getBaseType(); 995 } 996 997 // Check if we've already instantiated an gc qual'd type of this type. 998 llvm::FoldingSetNodeID ID; 999 ExtQualType::Profile(ID, TypeNode, AddressSpace, GCAttr); 1000 void *InsertPos = 0; 1001 if (ExtQualType *EXTQy = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos)) 1002 return QualType(EXTQy, CVRQuals); 1003 1004 // If the base type isn't canonical, this won't be a canonical type either, 1005 // so fill in the canonical type field. 1006 // FIXME: Isn't this also not canonical if the base type is a array 1007 // or pointer type? I can't find any documentation for objc_gc, though... 1008 QualType Canonical; 1009 if (!T->isCanonical()) { 1010 Canonical = getObjCGCQualType(CanT, GCAttr); 1011 1012 // Update InsertPos, the previous call could have invalidated it. 1013 ExtQualType *NewIP = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos); 1014 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1015 } 1016 ExtQualType *New = 1017 new (*this, 8) ExtQualType(TypeNode, Canonical, AddressSpace, GCAttr); 1018 ExtQualTypes.InsertNode(New, InsertPos); 1019 Types.push_back(New); 1020 return QualType(New, CVRQuals); 1021} 1022 1023/// getComplexType - Return the uniqued reference to the type for a complex 1024/// number with the specified element type. 1025QualType ASTContext::getComplexType(QualType T) { 1026 // Unique pointers, to guarantee there is only one pointer of a particular 1027 // structure. 1028 llvm::FoldingSetNodeID ID; 1029 ComplexType::Profile(ID, T); 1030 1031 void *InsertPos = 0; 1032 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1033 return QualType(CT, 0); 1034 1035 // If the pointee type isn't canonical, this won't be a canonical type either, 1036 // so fill in the canonical type field. 1037 QualType Canonical; 1038 if (!T->isCanonical()) { 1039 Canonical = getComplexType(getCanonicalType(T)); 1040 1041 // Get the new insert position for the node we care about. 1042 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1043 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1044 } 1045 ComplexType *New = new (*this,8) ComplexType(T, Canonical); 1046 Types.push_back(New); 1047 ComplexTypes.InsertNode(New, InsertPos); 1048 return QualType(New, 0); 1049} 1050 1051QualType ASTContext::getFixedWidthIntType(unsigned Width, bool Signed) { 1052 llvm::DenseMap<unsigned, FixedWidthIntType*> &Map = Signed ? 1053 SignedFixedWidthIntTypes : UnsignedFixedWidthIntTypes; 1054 FixedWidthIntType *&Entry = Map[Width]; 1055 if (!Entry) 1056 Entry = new FixedWidthIntType(Width, Signed); 1057 return QualType(Entry, 0); 1058} 1059 1060/// getPointerType - Return the uniqued reference to the type for a pointer to 1061/// the specified type. 1062QualType ASTContext::getPointerType(QualType T) { 1063 // Unique pointers, to guarantee there is only one pointer of a particular 1064 // structure. 1065 llvm::FoldingSetNodeID ID; 1066 PointerType::Profile(ID, T); 1067 1068 void *InsertPos = 0; 1069 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1070 return QualType(PT, 0); 1071 1072 // If the pointee type isn't canonical, this won't be a canonical type either, 1073 // so fill in the canonical type field. 1074 QualType Canonical; 1075 if (!T->isCanonical()) { 1076 Canonical = getPointerType(getCanonicalType(T)); 1077 1078 // Get the new insert position for the node we care about. 1079 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1080 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1081 } 1082 PointerType *New = new (*this,8) PointerType(T, Canonical); 1083 Types.push_back(New); 1084 PointerTypes.InsertNode(New, InsertPos); 1085 return QualType(New, 0); 1086} 1087 1088/// getBlockPointerType - Return the uniqued reference to the type for 1089/// a pointer to the specified block. 1090QualType ASTContext::getBlockPointerType(QualType T) { 1091 assert(T->isFunctionType() && "block of function types only"); 1092 // Unique pointers, to guarantee there is only one block of a particular 1093 // structure. 1094 llvm::FoldingSetNodeID ID; 1095 BlockPointerType::Profile(ID, T); 1096 1097 void *InsertPos = 0; 1098 if (BlockPointerType *PT = 1099 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1100 return QualType(PT, 0); 1101 1102 // If the block pointee type isn't canonical, this won't be a canonical 1103 // type either so fill in the canonical type field. 1104 QualType Canonical; 1105 if (!T->isCanonical()) { 1106 Canonical = getBlockPointerType(getCanonicalType(T)); 1107 1108 // Get the new insert position for the node we care about. 1109 BlockPointerType *NewIP = 1110 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1111 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1112 } 1113 BlockPointerType *New = new (*this,8) BlockPointerType(T, Canonical); 1114 Types.push_back(New); 1115 BlockPointerTypes.InsertNode(New, InsertPos); 1116 return QualType(New, 0); 1117} 1118 1119/// getLValueReferenceType - Return the uniqued reference to the type for an 1120/// lvalue reference to the specified type. 1121QualType ASTContext::getLValueReferenceType(QualType T) { 1122 // Unique pointers, to guarantee there is only one pointer of a particular 1123 // structure. 1124 llvm::FoldingSetNodeID ID; 1125 ReferenceType::Profile(ID, T); 1126 1127 void *InsertPos = 0; 1128 if (LValueReferenceType *RT = 1129 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1130 return QualType(RT, 0); 1131 1132 // If the referencee type isn't canonical, this won't be a canonical type 1133 // either, so fill in the canonical type field. 1134 QualType Canonical; 1135 if (!T->isCanonical()) { 1136 Canonical = getLValueReferenceType(getCanonicalType(T)); 1137 1138 // Get the new insert position for the node we care about. 1139 LValueReferenceType *NewIP = 1140 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1141 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1142 } 1143 1144 LValueReferenceType *New = new (*this,8) LValueReferenceType(T, Canonical); 1145 Types.push_back(New); 1146 LValueReferenceTypes.InsertNode(New, InsertPos); 1147 return QualType(New, 0); 1148} 1149 1150/// getRValueReferenceType - Return the uniqued reference to the type for an 1151/// rvalue reference to the specified type. 1152QualType ASTContext::getRValueReferenceType(QualType T) { 1153 // Unique pointers, to guarantee there is only one pointer of a particular 1154 // structure. 1155 llvm::FoldingSetNodeID ID; 1156 ReferenceType::Profile(ID, T); 1157 1158 void *InsertPos = 0; 1159 if (RValueReferenceType *RT = 1160 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1161 return QualType(RT, 0); 1162 1163 // If the referencee type isn't canonical, this won't be a canonical type 1164 // either, so fill in the canonical type field. 1165 QualType Canonical; 1166 if (!T->isCanonical()) { 1167 Canonical = getRValueReferenceType(getCanonicalType(T)); 1168 1169 // Get the new insert position for the node we care about. 1170 RValueReferenceType *NewIP = 1171 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1172 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1173 } 1174 1175 RValueReferenceType *New = new (*this,8) RValueReferenceType(T, Canonical); 1176 Types.push_back(New); 1177 RValueReferenceTypes.InsertNode(New, InsertPos); 1178 return QualType(New, 0); 1179} 1180 1181/// getMemberPointerType - Return the uniqued reference to the type for a 1182/// member pointer to the specified type, in the specified class. 1183QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) 1184{ 1185 // Unique pointers, to guarantee there is only one pointer of a particular 1186 // structure. 1187 llvm::FoldingSetNodeID ID; 1188 MemberPointerType::Profile(ID, T, Cls); 1189 1190 void *InsertPos = 0; 1191 if (MemberPointerType *PT = 1192 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1193 return QualType(PT, 0); 1194 1195 // If the pointee or class type isn't canonical, this won't be a canonical 1196 // type either, so fill in the canonical type field. 1197 QualType Canonical; 1198 if (!T->isCanonical()) { 1199 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1200 1201 // Get the new insert position for the node we care about. 1202 MemberPointerType *NewIP = 1203 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1204 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1205 } 1206 MemberPointerType *New = new (*this,8) MemberPointerType(T, Cls, Canonical); 1207 Types.push_back(New); 1208 MemberPointerTypes.InsertNode(New, InsertPos); 1209 return QualType(New, 0); 1210} 1211 1212/// getConstantArrayType - Return the unique reference to the type for an 1213/// array of the specified element type. 1214QualType ASTContext::getConstantArrayType(QualType EltTy, 1215 const llvm::APInt &ArySizeIn, 1216 ArrayType::ArraySizeModifier ASM, 1217 unsigned EltTypeQuals) { 1218 assert((EltTy->isDependentType() || EltTy->isConstantSizeType()) && 1219 "Constant array of VLAs is illegal!"); 1220 1221 // Convert the array size into a canonical width matching the pointer size for 1222 // the target. 1223 llvm::APInt ArySize(ArySizeIn); 1224 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1225 1226 llvm::FoldingSetNodeID ID; 1227 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1228 1229 void *InsertPos = 0; 1230 if (ConstantArrayType *ATP = 1231 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1232 return QualType(ATP, 0); 1233 1234 // If the element type isn't canonical, this won't be a canonical type either, 1235 // so fill in the canonical type field. 1236 QualType Canonical; 1237 if (!EltTy->isCanonical()) { 1238 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1239 ASM, EltTypeQuals); 1240 // Get the new insert position for the node we care about. 1241 ConstantArrayType *NewIP = 1242 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1243 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1244 } 1245 1246 ConstantArrayType *New = 1247 new(*this,8)ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1248 ConstantArrayTypes.InsertNode(New, InsertPos); 1249 Types.push_back(New); 1250 return QualType(New, 0); 1251} 1252 1253/// getConstantArrayWithExprType - Return a reference to the type for 1254/// an array of the specified element type. 1255QualType 1256ASTContext::getConstantArrayWithExprType(QualType EltTy, 1257 const llvm::APInt &ArySizeIn, 1258 Expr *ArySizeExpr, 1259 ArrayType::ArraySizeModifier ASM, 1260 unsigned EltTypeQuals, 1261 SourceRange Brackets) { 1262 // Convert the array size into a canonical width matching the pointer 1263 // size for the target. 1264 llvm::APInt ArySize(ArySizeIn); 1265 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1266 1267 // Compute the canonical ConstantArrayType. 1268 QualType Canonical = getConstantArrayType(getCanonicalType(EltTy), 1269 ArySize, ASM, EltTypeQuals); 1270 // Since we don't unique expressions, it isn't possible to unique VLA's 1271 // that have an expression provided for their size. 1272 ConstantArrayWithExprType *New = 1273 new(*this,8)ConstantArrayWithExprType(EltTy, Canonical, 1274 ArySize, ArySizeExpr, 1275 ASM, EltTypeQuals, Brackets); 1276 Types.push_back(New); 1277 return QualType(New, 0); 1278} 1279 1280/// getConstantArrayWithoutExprType - Return a reference to the type for 1281/// an array of the specified element type. 1282QualType 1283ASTContext::getConstantArrayWithoutExprType(QualType EltTy, 1284 const llvm::APInt &ArySizeIn, 1285 ArrayType::ArraySizeModifier ASM, 1286 unsigned EltTypeQuals) { 1287 // Convert the array size into a canonical width matching the pointer 1288 // size for the target. 1289 llvm::APInt ArySize(ArySizeIn); 1290 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1291 1292 // Compute the canonical ConstantArrayType. 1293 QualType Canonical = getConstantArrayType(getCanonicalType(EltTy), 1294 ArySize, ASM, EltTypeQuals); 1295 ConstantArrayWithoutExprType *New = 1296 new(*this,8)ConstantArrayWithoutExprType(EltTy, Canonical, 1297 ArySize, ASM, EltTypeQuals); 1298 Types.push_back(New); 1299 return QualType(New, 0); 1300} 1301 1302/// getVariableArrayType - Returns a non-unique reference to the type for a 1303/// variable array of the specified element type. 1304QualType ASTContext::getVariableArrayType(QualType EltTy, 1305 Expr *NumElts, 1306 ArrayType::ArraySizeModifier ASM, 1307 unsigned EltTypeQuals, 1308 SourceRange Brackets) { 1309 // Since we don't unique expressions, it isn't possible to unique VLA's 1310 // that have an expression provided for their size. 1311 1312 VariableArrayType *New = 1313 new(*this,8)VariableArrayType(EltTy, QualType(), 1314 NumElts, ASM, EltTypeQuals, Brackets); 1315 1316 VariableArrayTypes.push_back(New); 1317 Types.push_back(New); 1318 return QualType(New, 0); 1319} 1320 1321/// getDependentSizedArrayType - Returns a non-unique reference to 1322/// the type for a dependently-sized array of the specified element 1323/// type. FIXME: We will need these to be uniqued, or at least 1324/// comparable, at some point. 1325QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1326 Expr *NumElts, 1327 ArrayType::ArraySizeModifier ASM, 1328 unsigned EltTypeQuals, 1329 SourceRange Brackets) { 1330 assert((NumElts->isTypeDependent() || NumElts->isValueDependent()) && 1331 "Size must be type- or value-dependent!"); 1332 1333 // Since we don't unique expressions, it isn't possible to unique 1334 // dependently-sized array types. 1335 1336 DependentSizedArrayType *New = 1337 new (*this,8) DependentSizedArrayType(EltTy, QualType(), 1338 NumElts, ASM, EltTypeQuals, 1339 Brackets); 1340 1341 DependentSizedArrayTypes.push_back(New); 1342 Types.push_back(New); 1343 return QualType(New, 0); 1344} 1345 1346QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1347 ArrayType::ArraySizeModifier ASM, 1348 unsigned EltTypeQuals) { 1349 llvm::FoldingSetNodeID ID; 1350 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1351 1352 void *InsertPos = 0; 1353 if (IncompleteArrayType *ATP = 1354 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1355 return QualType(ATP, 0); 1356 1357 // If the element type isn't canonical, this won't be a canonical type 1358 // either, so fill in the canonical type field. 1359 QualType Canonical; 1360 1361 if (!EltTy->isCanonical()) { 1362 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1363 ASM, EltTypeQuals); 1364 1365 // Get the new insert position for the node we care about. 1366 IncompleteArrayType *NewIP = 1367 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1368 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1369 } 1370 1371 IncompleteArrayType *New 1372 = new (*this,8) IncompleteArrayType(EltTy, Canonical, 1373 ASM, EltTypeQuals); 1374 1375 IncompleteArrayTypes.InsertNode(New, InsertPos); 1376 Types.push_back(New); 1377 return QualType(New, 0); 1378} 1379 1380/// getVectorType - Return the unique reference to a vector type of 1381/// the specified element type and size. VectorType must be a built-in type. 1382QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts) { 1383 BuiltinType *baseType; 1384 1385 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1386 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1387 1388 // Check if we've already instantiated a vector of this type. 1389 llvm::FoldingSetNodeID ID; 1390 VectorType::Profile(ID, vecType, NumElts, Type::Vector); 1391 void *InsertPos = 0; 1392 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1393 return QualType(VTP, 0); 1394 1395 // If the element type isn't canonical, this won't be a canonical type either, 1396 // so fill in the canonical type field. 1397 QualType Canonical; 1398 if (!vecType->isCanonical()) { 1399 Canonical = getVectorType(getCanonicalType(vecType), NumElts); 1400 1401 // Get the new insert position for the node we care about. 1402 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1403 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1404 } 1405 VectorType *New = new (*this,8) VectorType(vecType, NumElts, Canonical); 1406 VectorTypes.InsertNode(New, InsertPos); 1407 Types.push_back(New); 1408 return QualType(New, 0); 1409} 1410 1411/// getExtVectorType - Return the unique reference to an extended vector type of 1412/// the specified element type and size. VectorType must be a built-in type. 1413QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1414 BuiltinType *baseType; 1415 1416 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1417 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1418 1419 // Check if we've already instantiated a vector of this type. 1420 llvm::FoldingSetNodeID ID; 1421 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector); 1422 void *InsertPos = 0; 1423 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1424 return QualType(VTP, 0); 1425 1426 // If the element type isn't canonical, this won't be a canonical type either, 1427 // so fill in the canonical type field. 1428 QualType Canonical; 1429 if (!vecType->isCanonical()) { 1430 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1431 1432 // Get the new insert position for the node we care about. 1433 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1434 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1435 } 1436 ExtVectorType *New = new (*this,8) ExtVectorType(vecType, NumElts, Canonical); 1437 VectorTypes.InsertNode(New, InsertPos); 1438 Types.push_back(New); 1439 return QualType(New, 0); 1440} 1441 1442QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1443 Expr *SizeExpr, 1444 SourceLocation AttrLoc) { 1445 DependentSizedExtVectorType *New = 1446 new (*this,8) DependentSizedExtVectorType(vecType, QualType(), 1447 SizeExpr, AttrLoc); 1448 1449 DependentSizedExtVectorTypes.push_back(New); 1450 Types.push_back(New); 1451 return QualType(New, 0); 1452} 1453 1454/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1455/// 1456QualType ASTContext::getFunctionNoProtoType(QualType ResultTy) { 1457 // Unique functions, to guarantee there is only one function of a particular 1458 // structure. 1459 llvm::FoldingSetNodeID ID; 1460 FunctionNoProtoType::Profile(ID, ResultTy); 1461 1462 void *InsertPos = 0; 1463 if (FunctionNoProtoType *FT = 1464 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1465 return QualType(FT, 0); 1466 1467 QualType Canonical; 1468 if (!ResultTy->isCanonical()) { 1469 Canonical = getFunctionNoProtoType(getCanonicalType(ResultTy)); 1470 1471 // Get the new insert position for the node we care about. 1472 FunctionNoProtoType *NewIP = 1473 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1474 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1475 } 1476 1477 FunctionNoProtoType *New =new(*this,8)FunctionNoProtoType(ResultTy,Canonical); 1478 Types.push_back(New); 1479 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1480 return QualType(New, 0); 1481} 1482 1483/// getFunctionType - Return a normal function type with a typed argument 1484/// list. isVariadic indicates whether the argument list includes '...'. 1485QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1486 unsigned NumArgs, bool isVariadic, 1487 unsigned TypeQuals, bool hasExceptionSpec, 1488 bool hasAnyExceptionSpec, unsigned NumExs, 1489 const QualType *ExArray) { 1490 // Unique functions, to guarantee there is only one function of a particular 1491 // structure. 1492 llvm::FoldingSetNodeID ID; 1493 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1494 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1495 NumExs, ExArray); 1496 1497 void *InsertPos = 0; 1498 if (FunctionProtoType *FTP = 1499 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1500 return QualType(FTP, 0); 1501 1502 // Determine whether the type being created is already canonical or not. 1503 bool isCanonical = ResultTy->isCanonical(); 1504 if (hasExceptionSpec) 1505 isCanonical = false; 1506 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1507 if (!ArgArray[i]->isCanonical()) 1508 isCanonical = false; 1509 1510 // If this type isn't canonical, get the canonical version of it. 1511 // The exception spec is not part of the canonical type. 1512 QualType Canonical; 1513 if (!isCanonical) { 1514 llvm::SmallVector<QualType, 16> CanonicalArgs; 1515 CanonicalArgs.reserve(NumArgs); 1516 for (unsigned i = 0; i != NumArgs; ++i) 1517 CanonicalArgs.push_back(getCanonicalType(ArgArray[i])); 1518 1519 Canonical = getFunctionType(getCanonicalType(ResultTy), 1520 CanonicalArgs.data(), NumArgs, 1521 isVariadic, TypeQuals); 1522 1523 // Get the new insert position for the node we care about. 1524 FunctionProtoType *NewIP = 1525 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1526 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1527 } 1528 1529 // FunctionProtoType objects are allocated with extra bytes after them 1530 // for two variable size arrays (for parameter and exception types) at the 1531 // end of them. 1532 FunctionProtoType *FTP = 1533 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1534 NumArgs*sizeof(QualType) + 1535 NumExs*sizeof(QualType), 8); 1536 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1537 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1538 ExArray, NumExs, Canonical); 1539 Types.push_back(FTP); 1540 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1541 return QualType(FTP, 0); 1542} 1543 1544/// getTypeDeclType - Return the unique reference to the type for the 1545/// specified type declaration. 1546QualType ASTContext::getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl) { 1547 assert(Decl && "Passed null for Decl param"); 1548 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1549 1550 if (TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1551 return getTypedefType(Typedef); 1552 else if (isa<TemplateTypeParmDecl>(Decl)) { 1553 assert(false && "Template type parameter types are always available."); 1554 } else if (ObjCInterfaceDecl *ObjCInterface = dyn_cast<ObjCInterfaceDecl>(Decl)) 1555 return getObjCInterfaceType(ObjCInterface); 1556 1557 if (RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1558 if (PrevDecl) 1559 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1560 else 1561 Decl->TypeForDecl = new (*this,8) RecordType(Record); 1562 } 1563 else if (EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1564 if (PrevDecl) 1565 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1566 else 1567 Decl->TypeForDecl = new (*this,8) EnumType(Enum); 1568 } 1569 else 1570 assert(false && "TypeDecl without a type?"); 1571 1572 if (!PrevDecl) Types.push_back(Decl->TypeForDecl); 1573 return QualType(Decl->TypeForDecl, 0); 1574} 1575 1576/// getTypedefType - Return the unique reference to the type for the 1577/// specified typename decl. 1578QualType ASTContext::getTypedefType(TypedefDecl *Decl) { 1579 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1580 1581 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1582 Decl->TypeForDecl = new(*this,8) TypedefType(Type::Typedef, Decl, Canonical); 1583 Types.push_back(Decl->TypeForDecl); 1584 return QualType(Decl->TypeForDecl, 0); 1585} 1586 1587/// \brief Retrieve the template type parameter type for a template 1588/// parameter or parameter pack with the given depth, index, and (optionally) 1589/// name. 1590QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1591 bool ParameterPack, 1592 IdentifierInfo *Name) { 1593 llvm::FoldingSetNodeID ID; 1594 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1595 void *InsertPos = 0; 1596 TemplateTypeParmType *TypeParm 1597 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1598 1599 if (TypeParm) 1600 return QualType(TypeParm, 0); 1601 1602 if (Name) { 1603 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1604 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index, ParameterPack, 1605 Name, Canon); 1606 } else 1607 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index, ParameterPack); 1608 1609 Types.push_back(TypeParm); 1610 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1611 1612 return QualType(TypeParm, 0); 1613} 1614 1615QualType 1616ASTContext::getTemplateSpecializationType(TemplateName Template, 1617 const TemplateArgument *Args, 1618 unsigned NumArgs, 1619 QualType Canon) { 1620 if (!Canon.isNull()) 1621 Canon = getCanonicalType(Canon); 1622 1623 llvm::FoldingSetNodeID ID; 1624 TemplateSpecializationType::Profile(ID, Template, Args, NumArgs); 1625 1626 void *InsertPos = 0; 1627 TemplateSpecializationType *Spec 1628 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1629 1630 if (Spec) 1631 return QualType(Spec, 0); 1632 1633 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1634 sizeof(TemplateArgument) * NumArgs), 1635 8); 1636 Spec = new (Mem) TemplateSpecializationType(Template, Args, NumArgs, Canon); 1637 Types.push_back(Spec); 1638 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1639 1640 return QualType(Spec, 0); 1641} 1642 1643QualType 1644ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1645 QualType NamedType) { 1646 llvm::FoldingSetNodeID ID; 1647 QualifiedNameType::Profile(ID, NNS, NamedType); 1648 1649 void *InsertPos = 0; 1650 QualifiedNameType *T 1651 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1652 if (T) 1653 return QualType(T, 0); 1654 1655 T = new (*this) QualifiedNameType(NNS, NamedType, 1656 getCanonicalType(NamedType)); 1657 Types.push_back(T); 1658 QualifiedNameTypes.InsertNode(T, InsertPos); 1659 return QualType(T, 0); 1660} 1661 1662QualType ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1663 const IdentifierInfo *Name, 1664 QualType Canon) { 1665 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1666 1667 if (Canon.isNull()) { 1668 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1669 if (CanonNNS != NNS) 1670 Canon = getTypenameType(CanonNNS, Name); 1671 } 1672 1673 llvm::FoldingSetNodeID ID; 1674 TypenameType::Profile(ID, NNS, Name); 1675 1676 void *InsertPos = 0; 1677 TypenameType *T 1678 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1679 if (T) 1680 return QualType(T, 0); 1681 1682 T = new (*this) TypenameType(NNS, Name, Canon); 1683 Types.push_back(T); 1684 TypenameTypes.InsertNode(T, InsertPos); 1685 return QualType(T, 0); 1686} 1687 1688QualType 1689ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1690 const TemplateSpecializationType *TemplateId, 1691 QualType Canon) { 1692 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1693 1694 if (Canon.isNull()) { 1695 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1696 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1697 if (CanonNNS != NNS || CanonType != QualType(TemplateId, 0)) { 1698 const TemplateSpecializationType *CanonTemplateId 1699 = CanonType->getAsTemplateSpecializationType(); 1700 assert(CanonTemplateId && 1701 "Canonical type must also be a template specialization type"); 1702 Canon = getTypenameType(CanonNNS, CanonTemplateId); 1703 } 1704 } 1705 1706 llvm::FoldingSetNodeID ID; 1707 TypenameType::Profile(ID, NNS, TemplateId); 1708 1709 void *InsertPos = 0; 1710 TypenameType *T 1711 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1712 if (T) 1713 return QualType(T, 0); 1714 1715 T = new (*this) TypenameType(NNS, TemplateId, Canon); 1716 Types.push_back(T); 1717 TypenameTypes.InsertNode(T, InsertPos); 1718 return QualType(T, 0); 1719} 1720 1721/// CmpProtocolNames - Comparison predicate for sorting protocols 1722/// alphabetically. 1723static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 1724 const ObjCProtocolDecl *RHS) { 1725 return LHS->getDeclName() < RHS->getDeclName(); 1726} 1727 1728static void SortAndUniqueProtocols(ObjCProtocolDecl **&Protocols, 1729 unsigned &NumProtocols) { 1730 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 1731 1732 // Sort protocols, keyed by name. 1733 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 1734 1735 // Remove duplicates. 1736 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 1737 NumProtocols = ProtocolsEnd-Protocols; 1738} 1739 1740/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 1741/// the given interface decl and the conforming protocol list. 1742QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 1743 ObjCProtocolDecl **Protocols, 1744 unsigned NumProtocols) { 1745 if (InterfaceT.isNull()) 1746 InterfaceT = ObjCBuiltinIdTy; 1747 1748 // Sort the protocol list alphabetically to canonicalize it. 1749 if (NumProtocols) 1750 SortAndUniqueProtocols(Protocols, NumProtocols); 1751 1752 llvm::FoldingSetNodeID ID; 1753 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 1754 1755 void *InsertPos = 0; 1756 if (ObjCObjectPointerType *QT = 1757 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1758 return QualType(QT, 0); 1759 1760 // No Match; 1761 ObjCObjectPointerType *QType = 1762 new (*this,8) ObjCObjectPointerType(InterfaceT, Protocols, NumProtocols); 1763 1764 Types.push_back(QType); 1765 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 1766 return QualType(QType, 0); 1767} 1768 1769/// getObjCInterfaceType - Return the unique reference to the type for the 1770/// specified ObjC interface decl. The list of protocols is optional. 1771QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 1772 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 1773 if (NumProtocols) 1774 // Sort the protocol list alphabetically to canonicalize it. 1775 SortAndUniqueProtocols(Protocols, NumProtocols); 1776 1777 llvm::FoldingSetNodeID ID; 1778 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 1779 1780 void *InsertPos = 0; 1781 if (ObjCInterfaceType *QT = 1782 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1783 return QualType(QT, 0); 1784 1785 // No Match; 1786 ObjCInterfaceType *QType = 1787 new (*this,8) ObjCInterfaceType(const_cast<ObjCInterfaceDecl*>(Decl), 1788 Protocols, NumProtocols); 1789 Types.push_back(QType); 1790 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 1791 return QualType(QType, 0); 1792} 1793 1794/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 1795/// TypeOfExprType AST's (since expression's are never shared). For example, 1796/// multiple declarations that refer to "typeof(x)" all contain different 1797/// DeclRefExpr's. This doesn't effect the type checker, since it operates 1798/// on canonical type's (which are always unique). 1799QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 1800 TypeOfExprType *toe; 1801 if (tofExpr->isTypeDependent()) 1802 toe = new (*this, 8) TypeOfExprType(tofExpr); 1803 else { 1804 QualType Canonical = getCanonicalType(tofExpr->getType()); 1805 toe = new (*this,8) TypeOfExprType(tofExpr, Canonical); 1806 } 1807 Types.push_back(toe); 1808 return QualType(toe, 0); 1809} 1810 1811/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 1812/// TypeOfType AST's. The only motivation to unique these nodes would be 1813/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 1814/// an issue. This doesn't effect the type checker, since it operates 1815/// on canonical type's (which are always unique). 1816QualType ASTContext::getTypeOfType(QualType tofType) { 1817 QualType Canonical = getCanonicalType(tofType); 1818 TypeOfType *tot = new (*this,8) TypeOfType(tofType, Canonical); 1819 Types.push_back(tot); 1820 return QualType(tot, 0); 1821} 1822 1823/// getDecltypeForExpr - Given an expr, will return the decltype for that 1824/// expression, according to the rules in C++0x [dcl.type.simple]p4 1825static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 1826 if (e->isTypeDependent()) 1827 return Context.DependentTy; 1828 1829 // If e is an id expression or a class member access, decltype(e) is defined 1830 // as the type of the entity named by e. 1831 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 1832 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 1833 return VD->getType(); 1834 } 1835 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 1836 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 1837 return FD->getType(); 1838 } 1839 // If e is a function call or an invocation of an overloaded operator, 1840 // (parentheses around e are ignored), decltype(e) is defined as the 1841 // return type of that function. 1842 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 1843 return CE->getCallReturnType(); 1844 1845 QualType T = e->getType(); 1846 1847 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 1848 // defined as T&, otherwise decltype(e) is defined as T. 1849 if (e->isLvalue(Context) == Expr::LV_Valid) 1850 T = Context.getLValueReferenceType(T); 1851 1852 return T; 1853} 1854 1855/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 1856/// DecltypeType AST's. The only motivation to unique these nodes would be 1857/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 1858/// an issue. This doesn't effect the type checker, since it operates 1859/// on canonical type's (which are always unique). 1860QualType ASTContext::getDecltypeType(Expr *e) { 1861 DecltypeType *dt; 1862 if (e->isTypeDependent()) // FIXME: canonicalize the expression 1863 dt = new (*this, 8) DecltypeType(e, DependentTy); 1864 else { 1865 QualType T = getDecltypeForExpr(e, *this); 1866 dt = new (*this, 8) DecltypeType(e, T, getCanonicalType(T)); 1867 } 1868 Types.push_back(dt); 1869 return QualType(dt, 0); 1870} 1871 1872/// getTagDeclType - Return the unique reference to the type for the 1873/// specified TagDecl (struct/union/class/enum) decl. 1874QualType ASTContext::getTagDeclType(TagDecl *Decl) { 1875 assert (Decl); 1876 return getTypeDeclType(Decl); 1877} 1878 1879/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 1880/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 1881/// needs to agree with the definition in <stddef.h>. 1882QualType ASTContext::getSizeType() const { 1883 return getFromTargetType(Target.getSizeType()); 1884} 1885 1886/// getSignedWCharType - Return the type of "signed wchar_t". 1887/// Used when in C++, as a GCC extension. 1888QualType ASTContext::getSignedWCharType() const { 1889 // FIXME: derive from "Target" ? 1890 return WCharTy; 1891} 1892 1893/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 1894/// Used when in C++, as a GCC extension. 1895QualType ASTContext::getUnsignedWCharType() const { 1896 // FIXME: derive from "Target" ? 1897 return UnsignedIntTy; 1898} 1899 1900/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 1901/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 1902QualType ASTContext::getPointerDiffType() const { 1903 return getFromTargetType(Target.getPtrDiffType(0)); 1904} 1905 1906//===----------------------------------------------------------------------===// 1907// Type Operators 1908//===----------------------------------------------------------------------===// 1909 1910/// getCanonicalType - Return the canonical (structural) type corresponding to 1911/// the specified potentially non-canonical type. The non-canonical version 1912/// of a type may have many "decorated" versions of types. Decorators can 1913/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 1914/// to be free of any of these, allowing two canonical types to be compared 1915/// for exact equality with a simple pointer comparison. 1916QualType ASTContext::getCanonicalType(QualType T) { 1917 QualType CanType = T.getTypePtr()->getCanonicalTypeInternal(); 1918 1919 // If the result has type qualifiers, make sure to canonicalize them as well. 1920 unsigned TypeQuals = T.getCVRQualifiers() | CanType.getCVRQualifiers(); 1921 if (TypeQuals == 0) return CanType; 1922 1923 // If the type qualifiers are on an array type, get the canonical type of the 1924 // array with the qualifiers applied to the element type. 1925 ArrayType *AT = dyn_cast<ArrayType>(CanType); 1926 if (!AT) 1927 return CanType.getQualifiedType(TypeQuals); 1928 1929 // Get the canonical version of the element with the extra qualifiers on it. 1930 // This can recursively sink qualifiers through multiple levels of arrays. 1931 QualType NewEltTy=AT->getElementType().getWithAdditionalQualifiers(TypeQuals); 1932 NewEltTy = getCanonicalType(NewEltTy); 1933 1934 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 1935 return getConstantArrayType(NewEltTy, CAT->getSize(),CAT->getSizeModifier(), 1936 CAT->getIndexTypeQualifier()); 1937 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 1938 return getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 1939 IAT->getIndexTypeQualifier()); 1940 1941 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 1942 return getDependentSizedArrayType(NewEltTy, 1943 DSAT->getSizeExpr(), 1944 DSAT->getSizeModifier(), 1945 DSAT->getIndexTypeQualifier(), 1946 DSAT->getBracketsRange()); 1947 1948 VariableArrayType *VAT = cast<VariableArrayType>(AT); 1949 return getVariableArrayType(NewEltTy, 1950 VAT->getSizeExpr(), 1951 VAT->getSizeModifier(), 1952 VAT->getIndexTypeQualifier(), 1953 VAT->getBracketsRange()); 1954} 1955 1956TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 1957 // If this template name refers to a template, the canonical 1958 // template name merely stores the template itself. 1959 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 1960 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 1961 1962 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 1963 assert(DTN && "Non-dependent template names must refer to template decls."); 1964 return DTN->CanonicalTemplateName; 1965} 1966 1967NestedNameSpecifier * 1968ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 1969 if (!NNS) 1970 return 0; 1971 1972 switch (NNS->getKind()) { 1973 case NestedNameSpecifier::Identifier: 1974 // Canonicalize the prefix but keep the identifier the same. 1975 return NestedNameSpecifier::Create(*this, 1976 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 1977 NNS->getAsIdentifier()); 1978 1979 case NestedNameSpecifier::Namespace: 1980 // A namespace is canonical; build a nested-name-specifier with 1981 // this namespace and no prefix. 1982 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 1983 1984 case NestedNameSpecifier::TypeSpec: 1985 case NestedNameSpecifier::TypeSpecWithTemplate: { 1986 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 1987 NestedNameSpecifier *Prefix = 0; 1988 1989 // FIXME: This isn't the right check! 1990 if (T->isDependentType()) 1991 Prefix = getCanonicalNestedNameSpecifier(NNS->getPrefix()); 1992 1993 return NestedNameSpecifier::Create(*this, Prefix, 1994 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 1995 T.getTypePtr()); 1996 } 1997 1998 case NestedNameSpecifier::Global: 1999 // The global specifier is canonical and unique. 2000 return NNS; 2001 } 2002 2003 // Required to silence a GCC warning 2004 return 0; 2005} 2006 2007 2008const ArrayType *ASTContext::getAsArrayType(QualType T) { 2009 // Handle the non-qualified case efficiently. 2010 if (T.getCVRQualifiers() == 0) { 2011 // Handle the common positive case fast. 2012 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2013 return AT; 2014 } 2015 2016 // Handle the common negative case fast, ignoring CVR qualifiers. 2017 QualType CType = T->getCanonicalTypeInternal(); 2018 2019 // Make sure to look through type qualifiers (like ExtQuals) for the negative 2020 // test. 2021 if (!isa<ArrayType>(CType) && 2022 !isa<ArrayType>(CType.getUnqualifiedType())) 2023 return 0; 2024 2025 // Apply any CVR qualifiers from the array type to the element type. This 2026 // implements C99 6.7.3p8: "If the specification of an array type includes 2027 // any type qualifiers, the element type is so qualified, not the array type." 2028 2029 // If we get here, we either have type qualifiers on the type, or we have 2030 // sugar such as a typedef in the way. If we have type qualifiers on the type 2031 // we must propagate them down into the elemeng type. 2032 unsigned CVRQuals = T.getCVRQualifiers(); 2033 unsigned AddrSpace = 0; 2034 Type *Ty = T.getTypePtr(); 2035 2036 // Rip through ExtQualType's and typedefs to get to a concrete type. 2037 while (1) { 2038 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(Ty)) { 2039 AddrSpace = EXTQT->getAddressSpace(); 2040 Ty = EXTQT->getBaseType(); 2041 } else { 2042 T = Ty->getDesugaredType(); 2043 if (T.getTypePtr() == Ty && T.getCVRQualifiers() == 0) 2044 break; 2045 CVRQuals |= T.getCVRQualifiers(); 2046 Ty = T.getTypePtr(); 2047 } 2048 } 2049 2050 // If we have a simple case, just return now. 2051 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2052 if (ATy == 0 || (AddrSpace == 0 && CVRQuals == 0)) 2053 return ATy; 2054 2055 // Otherwise, we have an array and we have qualifiers on it. Push the 2056 // qualifiers into the array element type and return a new array type. 2057 // Get the canonical version of the element with the extra qualifiers on it. 2058 // This can recursively sink qualifiers through multiple levels of arrays. 2059 QualType NewEltTy = ATy->getElementType(); 2060 if (AddrSpace) 2061 NewEltTy = getAddrSpaceQualType(NewEltTy, AddrSpace); 2062 NewEltTy = NewEltTy.getWithAdditionalQualifiers(CVRQuals); 2063 2064 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2065 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2066 CAT->getSizeModifier(), 2067 CAT->getIndexTypeQualifier())); 2068 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2069 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2070 IAT->getSizeModifier(), 2071 IAT->getIndexTypeQualifier())); 2072 2073 if (const DependentSizedArrayType *DSAT 2074 = dyn_cast<DependentSizedArrayType>(ATy)) 2075 return cast<ArrayType>( 2076 getDependentSizedArrayType(NewEltTy, 2077 DSAT->getSizeExpr(), 2078 DSAT->getSizeModifier(), 2079 DSAT->getIndexTypeQualifier(), 2080 DSAT->getBracketsRange())); 2081 2082 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2083 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2084 VAT->getSizeExpr(), 2085 VAT->getSizeModifier(), 2086 VAT->getIndexTypeQualifier(), 2087 VAT->getBracketsRange())); 2088} 2089 2090 2091/// getArrayDecayedType - Return the properly qualified result of decaying the 2092/// specified array type to a pointer. This operation is non-trivial when 2093/// handling typedefs etc. The canonical type of "T" must be an array type, 2094/// this returns a pointer to a properly qualified element of the array. 2095/// 2096/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2097QualType ASTContext::getArrayDecayedType(QualType Ty) { 2098 // Get the element type with 'getAsArrayType' so that we don't lose any 2099 // typedefs in the element type of the array. This also handles propagation 2100 // of type qualifiers from the array type into the element type if present 2101 // (C99 6.7.3p8). 2102 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2103 assert(PrettyArrayType && "Not an array type!"); 2104 2105 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2106 2107 // int x[restrict 4] -> int *restrict 2108 return PtrTy.getQualifiedType(PrettyArrayType->getIndexTypeQualifier()); 2109} 2110 2111QualType ASTContext::getBaseElementType(const VariableArrayType *VAT) { 2112 QualType ElemTy = VAT->getElementType(); 2113 2114 if (const VariableArrayType *VAT = getAsVariableArrayType(ElemTy)) 2115 return getBaseElementType(VAT); 2116 2117 return ElemTy; 2118} 2119 2120/// getFloatingRank - Return a relative rank for floating point types. 2121/// This routine will assert if passed a built-in type that isn't a float. 2122static FloatingRank getFloatingRank(QualType T) { 2123 if (const ComplexType *CT = T->getAsComplexType()) 2124 return getFloatingRank(CT->getElementType()); 2125 2126 assert(T->getAsBuiltinType() && "getFloatingRank(): not a floating type"); 2127 switch (T->getAsBuiltinType()->getKind()) { 2128 default: assert(0 && "getFloatingRank(): not a floating type"); 2129 case BuiltinType::Float: return FloatRank; 2130 case BuiltinType::Double: return DoubleRank; 2131 case BuiltinType::LongDouble: return LongDoubleRank; 2132 } 2133} 2134 2135/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2136/// point or a complex type (based on typeDomain/typeSize). 2137/// 'typeDomain' is a real floating point or complex type. 2138/// 'typeSize' is a real floating point or complex type. 2139QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2140 QualType Domain) const { 2141 FloatingRank EltRank = getFloatingRank(Size); 2142 if (Domain->isComplexType()) { 2143 switch (EltRank) { 2144 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2145 case FloatRank: return FloatComplexTy; 2146 case DoubleRank: return DoubleComplexTy; 2147 case LongDoubleRank: return LongDoubleComplexTy; 2148 } 2149 } 2150 2151 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2152 switch (EltRank) { 2153 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2154 case FloatRank: return FloatTy; 2155 case DoubleRank: return DoubleTy; 2156 case LongDoubleRank: return LongDoubleTy; 2157 } 2158} 2159 2160/// getFloatingTypeOrder - Compare the rank of the two specified floating 2161/// point types, ignoring the domain of the type (i.e. 'double' == 2162/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2163/// LHS < RHS, return -1. 2164int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2165 FloatingRank LHSR = getFloatingRank(LHS); 2166 FloatingRank RHSR = getFloatingRank(RHS); 2167 2168 if (LHSR == RHSR) 2169 return 0; 2170 if (LHSR > RHSR) 2171 return 1; 2172 return -1; 2173} 2174 2175/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2176/// routine will assert if passed a built-in type that isn't an integer or enum, 2177/// or if it is not canonicalized. 2178unsigned ASTContext::getIntegerRank(Type *T) { 2179 assert(T->isCanonical() && "T should be canonicalized"); 2180 if (EnumType* ET = dyn_cast<EnumType>(T)) 2181 T = ET->getDecl()->getIntegerType().getTypePtr(); 2182 2183 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2184 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2185 2186 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2187 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2188 2189 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2190 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2191 2192 // There are two things which impact the integer rank: the width, and 2193 // the ordering of builtins. The builtin ordering is encoded in the 2194 // bottom three bits; the width is encoded in the bits above that. 2195 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) 2196 return FWIT->getWidth() << 3; 2197 2198 switch (cast<BuiltinType>(T)->getKind()) { 2199 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2200 case BuiltinType::Bool: 2201 return 1 + (getIntWidth(BoolTy) << 3); 2202 case BuiltinType::Char_S: 2203 case BuiltinType::Char_U: 2204 case BuiltinType::SChar: 2205 case BuiltinType::UChar: 2206 return 2 + (getIntWidth(CharTy) << 3); 2207 case BuiltinType::Short: 2208 case BuiltinType::UShort: 2209 return 3 + (getIntWidth(ShortTy) << 3); 2210 case BuiltinType::Int: 2211 case BuiltinType::UInt: 2212 return 4 + (getIntWidth(IntTy) << 3); 2213 case BuiltinType::Long: 2214 case BuiltinType::ULong: 2215 return 5 + (getIntWidth(LongTy) << 3); 2216 case BuiltinType::LongLong: 2217 case BuiltinType::ULongLong: 2218 return 6 + (getIntWidth(LongLongTy) << 3); 2219 case BuiltinType::Int128: 2220 case BuiltinType::UInt128: 2221 return 7 + (getIntWidth(Int128Ty) << 3); 2222 } 2223} 2224 2225/// getIntegerTypeOrder - Returns the highest ranked integer type: 2226/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2227/// LHS < RHS, return -1. 2228int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2229 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2230 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2231 if (LHSC == RHSC) return 0; 2232 2233 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2234 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2235 2236 unsigned LHSRank = getIntegerRank(LHSC); 2237 unsigned RHSRank = getIntegerRank(RHSC); 2238 2239 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2240 if (LHSRank == RHSRank) return 0; 2241 return LHSRank > RHSRank ? 1 : -1; 2242 } 2243 2244 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2245 if (LHSUnsigned) { 2246 // If the unsigned [LHS] type is larger, return it. 2247 if (LHSRank >= RHSRank) 2248 return 1; 2249 2250 // If the signed type can represent all values of the unsigned type, it 2251 // wins. Because we are dealing with 2's complement and types that are 2252 // powers of two larger than each other, this is always safe. 2253 return -1; 2254 } 2255 2256 // If the unsigned [RHS] type is larger, return it. 2257 if (RHSRank >= LHSRank) 2258 return -1; 2259 2260 // If the signed type can represent all values of the unsigned type, it 2261 // wins. Because we are dealing with 2's complement and types that are 2262 // powers of two larger than each other, this is always safe. 2263 return 1; 2264} 2265 2266// getCFConstantStringType - Return the type used for constant CFStrings. 2267QualType ASTContext::getCFConstantStringType() { 2268 if (!CFConstantStringTypeDecl) { 2269 CFConstantStringTypeDecl = 2270 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2271 &Idents.get("NSConstantString")); 2272 QualType FieldTypes[4]; 2273 2274 // const int *isa; 2275 FieldTypes[0] = getPointerType(IntTy.getQualifiedType(QualType::Const)); 2276 // int flags; 2277 FieldTypes[1] = IntTy; 2278 // const char *str; 2279 FieldTypes[2] = getPointerType(CharTy.getQualifiedType(QualType::Const)); 2280 // long length; 2281 FieldTypes[3] = LongTy; 2282 2283 // Create fields 2284 for (unsigned i = 0; i < 4; ++i) { 2285 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2286 SourceLocation(), 0, 2287 FieldTypes[i], /*BitWidth=*/0, 2288 /*Mutable=*/false); 2289 CFConstantStringTypeDecl->addDecl(Field); 2290 } 2291 2292 CFConstantStringTypeDecl->completeDefinition(*this); 2293 } 2294 2295 return getTagDeclType(CFConstantStringTypeDecl); 2296} 2297 2298void ASTContext::setCFConstantStringType(QualType T) { 2299 const RecordType *Rec = T->getAsRecordType(); 2300 assert(Rec && "Invalid CFConstantStringType"); 2301 CFConstantStringTypeDecl = Rec->getDecl(); 2302} 2303 2304QualType ASTContext::getObjCFastEnumerationStateType() 2305{ 2306 if (!ObjCFastEnumerationStateTypeDecl) { 2307 ObjCFastEnumerationStateTypeDecl = 2308 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2309 &Idents.get("__objcFastEnumerationState")); 2310 2311 QualType FieldTypes[] = { 2312 UnsignedLongTy, 2313 getPointerType(ObjCIdTypedefType), 2314 getPointerType(UnsignedLongTy), 2315 getConstantArrayType(UnsignedLongTy, 2316 llvm::APInt(32, 5), ArrayType::Normal, 0) 2317 }; 2318 2319 for (size_t i = 0; i < 4; ++i) { 2320 FieldDecl *Field = FieldDecl::Create(*this, 2321 ObjCFastEnumerationStateTypeDecl, 2322 SourceLocation(), 0, 2323 FieldTypes[i], /*BitWidth=*/0, 2324 /*Mutable=*/false); 2325 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2326 } 2327 2328 ObjCFastEnumerationStateTypeDecl->completeDefinition(*this); 2329 } 2330 2331 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2332} 2333 2334void ASTContext::setObjCFastEnumerationStateType(QualType T) { 2335 const RecordType *Rec = T->getAsRecordType(); 2336 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 2337 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 2338} 2339 2340// This returns true if a type has been typedefed to BOOL: 2341// typedef <type> BOOL; 2342static bool isTypeTypedefedAsBOOL(QualType T) { 2343 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 2344 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 2345 return II->isStr("BOOL"); 2346 2347 return false; 2348} 2349 2350/// getObjCEncodingTypeSize returns size of type for objective-c encoding 2351/// purpose. 2352int ASTContext::getObjCEncodingTypeSize(QualType type) { 2353 uint64_t sz = getTypeSize(type); 2354 2355 // Make all integer and enum types at least as large as an int 2356 if (sz > 0 && type->isIntegralType()) 2357 sz = std::max(sz, getTypeSize(IntTy)); 2358 // Treat arrays as pointers, since that's how they're passed in. 2359 else if (type->isArrayType()) 2360 sz = getTypeSize(VoidPtrTy); 2361 return sz / getTypeSize(CharTy); 2362} 2363 2364/// getObjCEncodingForMethodDecl - Return the encoded type for this method 2365/// declaration. 2366void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 2367 std::string& S) { 2368 // FIXME: This is not very efficient. 2369 // Encode type qualifer, 'in', 'inout', etc. for the return type. 2370 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 2371 // Encode result type. 2372 getObjCEncodingForType(Decl->getResultType(), S); 2373 // Compute size of all parameters. 2374 // Start with computing size of a pointer in number of bytes. 2375 // FIXME: There might(should) be a better way of doing this computation! 2376 SourceLocation Loc; 2377 int PtrSize = getTypeSize(VoidPtrTy) / getTypeSize(CharTy); 2378 // The first two arguments (self and _cmd) are pointers; account for 2379 // their size. 2380 int ParmOffset = 2 * PtrSize; 2381 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 2382 E = Decl->param_end(); PI != E; ++PI) { 2383 QualType PType = (*PI)->getType(); 2384 int sz = getObjCEncodingTypeSize(PType); 2385 assert (sz > 0 && "getObjCEncodingForMethodDecl - Incomplete param type"); 2386 ParmOffset += sz; 2387 } 2388 S += llvm::utostr(ParmOffset); 2389 S += "@0:"; 2390 S += llvm::utostr(PtrSize); 2391 2392 // Argument types. 2393 ParmOffset = 2 * PtrSize; 2394 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 2395 E = Decl->param_end(); PI != E; ++PI) { 2396 ParmVarDecl *PVDecl = *PI; 2397 QualType PType = PVDecl->getOriginalType(); 2398 if (const ArrayType *AT = 2399 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 2400 // Use array's original type only if it has known number of 2401 // elements. 2402 if (!isa<ConstantArrayType>(AT)) 2403 PType = PVDecl->getType(); 2404 } else if (PType->isFunctionType()) 2405 PType = PVDecl->getType(); 2406 // Process argument qualifiers for user supplied arguments; such as, 2407 // 'in', 'inout', etc. 2408 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 2409 getObjCEncodingForType(PType, S); 2410 S += llvm::utostr(ParmOffset); 2411 ParmOffset += getObjCEncodingTypeSize(PType); 2412 } 2413} 2414 2415/// getObjCEncodingForPropertyDecl - Return the encoded type for this 2416/// property declaration. If non-NULL, Container must be either an 2417/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 2418/// NULL when getting encodings for protocol properties. 2419/// Property attributes are stored as a comma-delimited C string. The simple 2420/// attributes readonly and bycopy are encoded as single characters. The 2421/// parametrized attributes, getter=name, setter=name, and ivar=name, are 2422/// encoded as single characters, followed by an identifier. Property types 2423/// are also encoded as a parametrized attribute. The characters used to encode 2424/// these attributes are defined by the following enumeration: 2425/// @code 2426/// enum PropertyAttributes { 2427/// kPropertyReadOnly = 'R', // property is read-only. 2428/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 2429/// kPropertyByref = '&', // property is a reference to the value last assigned 2430/// kPropertyDynamic = 'D', // property is dynamic 2431/// kPropertyGetter = 'G', // followed by getter selector name 2432/// kPropertySetter = 'S', // followed by setter selector name 2433/// kPropertyInstanceVariable = 'V' // followed by instance variable name 2434/// kPropertyType = 't' // followed by old-style type encoding. 2435/// kPropertyWeak = 'W' // 'weak' property 2436/// kPropertyStrong = 'P' // property GC'able 2437/// kPropertyNonAtomic = 'N' // property non-atomic 2438/// }; 2439/// @endcode 2440void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 2441 const Decl *Container, 2442 std::string& S) { 2443 // Collect information from the property implementation decl(s). 2444 bool Dynamic = false; 2445 ObjCPropertyImplDecl *SynthesizePID = 0; 2446 2447 // FIXME: Duplicated code due to poor abstraction. 2448 if (Container) { 2449 if (const ObjCCategoryImplDecl *CID = 2450 dyn_cast<ObjCCategoryImplDecl>(Container)) { 2451 for (ObjCCategoryImplDecl::propimpl_iterator 2452 i = CID->propimpl_begin(), e = CID->propimpl_end(); 2453 i != e; ++i) { 2454 ObjCPropertyImplDecl *PID = *i; 2455 if (PID->getPropertyDecl() == PD) { 2456 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 2457 Dynamic = true; 2458 } else { 2459 SynthesizePID = PID; 2460 } 2461 } 2462 } 2463 } else { 2464 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 2465 for (ObjCCategoryImplDecl::propimpl_iterator 2466 i = OID->propimpl_begin(), e = OID->propimpl_end(); 2467 i != e; ++i) { 2468 ObjCPropertyImplDecl *PID = *i; 2469 if (PID->getPropertyDecl() == PD) { 2470 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 2471 Dynamic = true; 2472 } else { 2473 SynthesizePID = PID; 2474 } 2475 } 2476 } 2477 } 2478 } 2479 2480 // FIXME: This is not very efficient. 2481 S = "T"; 2482 2483 // Encode result type. 2484 // GCC has some special rules regarding encoding of properties which 2485 // closely resembles encoding of ivars. 2486 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 2487 true /* outermost type */, 2488 true /* encoding for property */); 2489 2490 if (PD->isReadOnly()) { 2491 S += ",R"; 2492 } else { 2493 switch (PD->getSetterKind()) { 2494 case ObjCPropertyDecl::Assign: break; 2495 case ObjCPropertyDecl::Copy: S += ",C"; break; 2496 case ObjCPropertyDecl::Retain: S += ",&"; break; 2497 } 2498 } 2499 2500 // It really isn't clear at all what this means, since properties 2501 // are "dynamic by default". 2502 if (Dynamic) 2503 S += ",D"; 2504 2505 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 2506 S += ",N"; 2507 2508 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 2509 S += ",G"; 2510 S += PD->getGetterName().getAsString(); 2511 } 2512 2513 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 2514 S += ",S"; 2515 S += PD->getSetterName().getAsString(); 2516 } 2517 2518 if (SynthesizePID) { 2519 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 2520 S += ",V"; 2521 S += OID->getNameAsString(); 2522 } 2523 2524 // FIXME: OBJCGC: weak & strong 2525} 2526 2527/// getLegacyIntegralTypeEncoding - 2528/// Another legacy compatibility encoding: 32-bit longs are encoded as 2529/// 'l' or 'L' , but not always. For typedefs, we need to use 2530/// 'i' or 'I' instead if encoding a struct field, or a pointer! 2531/// 2532void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 2533 if (dyn_cast<TypedefType>(PointeeTy.getTypePtr())) { 2534 if (const BuiltinType *BT = PointeeTy->getAsBuiltinType()) { 2535 if (BT->getKind() == BuiltinType::ULong && 2536 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 2537 PointeeTy = UnsignedIntTy; 2538 else 2539 if (BT->getKind() == BuiltinType::Long && 2540 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 2541 PointeeTy = IntTy; 2542 } 2543 } 2544} 2545 2546void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 2547 const FieldDecl *Field) { 2548 // We follow the behavior of gcc, expanding structures which are 2549 // directly pointed to, and expanding embedded structures. Note that 2550 // these rules are sufficient to prevent recursive encoding of the 2551 // same type. 2552 getObjCEncodingForTypeImpl(T, S, true, true, Field, 2553 true /* outermost type */); 2554} 2555 2556static void EncodeBitField(const ASTContext *Context, std::string& S, 2557 const FieldDecl *FD) { 2558 const Expr *E = FD->getBitWidth(); 2559 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 2560 ASTContext *Ctx = const_cast<ASTContext*>(Context); 2561 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 2562 S += 'b'; 2563 S += llvm::utostr(N); 2564} 2565 2566void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 2567 bool ExpandPointedToStructures, 2568 bool ExpandStructures, 2569 const FieldDecl *FD, 2570 bool OutermostType, 2571 bool EncodingProperty) { 2572 if (const BuiltinType *BT = T->getAsBuiltinType()) { 2573 if (FD && FD->isBitField()) 2574 return EncodeBitField(this, S, FD); 2575 char encoding; 2576 switch (BT->getKind()) { 2577 default: assert(0 && "Unhandled builtin type kind"); 2578 case BuiltinType::Void: encoding = 'v'; break; 2579 case BuiltinType::Bool: encoding = 'B'; break; 2580 case BuiltinType::Char_U: 2581 case BuiltinType::UChar: encoding = 'C'; break; 2582 case BuiltinType::UShort: encoding = 'S'; break; 2583 case BuiltinType::UInt: encoding = 'I'; break; 2584 case BuiltinType::ULong: 2585 encoding = 2586 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 2587 break; 2588 case BuiltinType::UInt128: encoding = 'T'; break; 2589 case BuiltinType::ULongLong: encoding = 'Q'; break; 2590 case BuiltinType::Char_S: 2591 case BuiltinType::SChar: encoding = 'c'; break; 2592 case BuiltinType::Short: encoding = 's'; break; 2593 case BuiltinType::Int: encoding = 'i'; break; 2594 case BuiltinType::Long: 2595 encoding = 2596 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 2597 break; 2598 case BuiltinType::LongLong: encoding = 'q'; break; 2599 case BuiltinType::Int128: encoding = 't'; break; 2600 case BuiltinType::Float: encoding = 'f'; break; 2601 case BuiltinType::Double: encoding = 'd'; break; 2602 case BuiltinType::LongDouble: encoding = 'd'; break; 2603 } 2604 2605 S += encoding; 2606 return; 2607 } 2608 2609 if (const ComplexType *CT = T->getAsComplexType()) { 2610 S += 'j'; 2611 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 2612 false); 2613 return; 2614 } 2615 2616 if (const PointerType *PT = T->getAsPointerType()) { 2617 QualType PointeeTy = PT->getPointeeType(); 2618 bool isReadOnly = false; 2619 // For historical/compatibility reasons, the read-only qualifier of the 2620 // pointee gets emitted _before_ the '^'. The read-only qualifier of 2621 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 2622 // Also, do not emit the 'r' for anything but the outermost type! 2623 if (dyn_cast<TypedefType>(T.getTypePtr())) { 2624 if (OutermostType && T.isConstQualified()) { 2625 isReadOnly = true; 2626 S += 'r'; 2627 } 2628 } 2629 else if (OutermostType) { 2630 QualType P = PointeeTy; 2631 while (P->getAsPointerType()) 2632 P = P->getAsPointerType()->getPointeeType(); 2633 if (P.isConstQualified()) { 2634 isReadOnly = true; 2635 S += 'r'; 2636 } 2637 } 2638 if (isReadOnly) { 2639 // Another legacy compatibility encoding. Some ObjC qualifier and type 2640 // combinations need to be rearranged. 2641 // Rewrite "in const" from "nr" to "rn" 2642 const char * s = S.c_str(); 2643 int len = S.length(); 2644 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 2645 std::string replace = "rn"; 2646 S.replace(S.end()-2, S.end(), replace); 2647 } 2648 } 2649 if (isObjCSelType(PointeeTy)) { 2650 S += ':'; 2651 return; 2652 } 2653 2654 if (PointeeTy->isCharType()) { 2655 // char pointer types should be encoded as '*' unless it is a 2656 // type that has been typedef'd to 'BOOL'. 2657 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 2658 S += '*'; 2659 return; 2660 } 2661 } 2662 2663 S += '^'; 2664 getLegacyIntegralTypeEncoding(PointeeTy); 2665 2666 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 2667 NULL); 2668 return; 2669 } 2670 2671 if (const ArrayType *AT = 2672 // Ignore type qualifiers etc. 2673 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 2674 if (isa<IncompleteArrayType>(AT)) { 2675 // Incomplete arrays are encoded as a pointer to the array element. 2676 S += '^'; 2677 2678 getObjCEncodingForTypeImpl(AT->getElementType(), S, 2679 false, ExpandStructures, FD); 2680 } else { 2681 S += '['; 2682 2683 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2684 S += llvm::utostr(CAT->getSize().getZExtValue()); 2685 else { 2686 //Variable length arrays are encoded as a regular array with 0 elements. 2687 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 2688 S += '0'; 2689 } 2690 2691 getObjCEncodingForTypeImpl(AT->getElementType(), S, 2692 false, ExpandStructures, FD); 2693 S += ']'; 2694 } 2695 return; 2696 } 2697 2698 if (T->getAsFunctionType()) { 2699 S += '?'; 2700 return; 2701 } 2702 2703 if (const RecordType *RTy = T->getAsRecordType()) { 2704 RecordDecl *RDecl = RTy->getDecl(); 2705 S += RDecl->isUnion() ? '(' : '{'; 2706 // Anonymous structures print as '?' 2707 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 2708 S += II->getName(); 2709 } else { 2710 S += '?'; 2711 } 2712 if (ExpandStructures) { 2713 S += '='; 2714 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 2715 FieldEnd = RDecl->field_end(); 2716 Field != FieldEnd; ++Field) { 2717 if (FD) { 2718 S += '"'; 2719 S += Field->getNameAsString(); 2720 S += '"'; 2721 } 2722 2723 // Special case bit-fields. 2724 if (Field->isBitField()) { 2725 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 2726 (*Field)); 2727 } else { 2728 QualType qt = Field->getType(); 2729 getLegacyIntegralTypeEncoding(qt); 2730 getObjCEncodingForTypeImpl(qt, S, false, true, 2731 FD); 2732 } 2733 } 2734 } 2735 S += RDecl->isUnion() ? ')' : '}'; 2736 return; 2737 } 2738 2739 if (T->isEnumeralType()) { 2740 if (FD && FD->isBitField()) 2741 EncodeBitField(this, S, FD); 2742 else 2743 S += 'i'; 2744 return; 2745 } 2746 2747 if (T->isBlockPointerType()) { 2748 S += "@?"; // Unlike a pointer-to-function, which is "^?". 2749 return; 2750 } 2751 2752 if (T->isObjCInterfaceType()) { 2753 // @encode(class_name) 2754 ObjCInterfaceDecl *OI = T->getAsObjCInterfaceType()->getDecl(); 2755 S += '{'; 2756 const IdentifierInfo *II = OI->getIdentifier(); 2757 S += II->getName(); 2758 S += '='; 2759 llvm::SmallVector<FieldDecl*, 32> RecFields; 2760 CollectObjCIvars(OI, RecFields); 2761 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 2762 if (RecFields[i]->isBitField()) 2763 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 2764 RecFields[i]); 2765 else 2766 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 2767 FD); 2768 } 2769 S += '}'; 2770 return; 2771 } 2772 2773 if (const ObjCObjectPointerType *OPT = T->getAsObjCObjectPointerType()) { 2774 if (OPT->isObjCIdType()) { 2775 S += '@'; 2776 return; 2777 } 2778 2779 if (OPT->isObjCClassType()) { 2780 S += '#'; 2781 return; 2782 } 2783 2784 if (OPT->isObjCQualifiedIdType()) { 2785 getObjCEncodingForTypeImpl(getObjCIdType(), S, 2786 ExpandPointedToStructures, 2787 ExpandStructures, FD); 2788 if (FD || EncodingProperty) { 2789 // Note that we do extended encoding of protocol qualifer list 2790 // Only when doing ivar or property encoding. 2791 S += '"'; 2792 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 2793 E = OPT->qual_end(); I != E; ++I) { 2794 S += '<'; 2795 S += (*I)->getNameAsString(); 2796 S += '>'; 2797 } 2798 S += '"'; 2799 } 2800 return; 2801 } 2802 2803 QualType PointeeTy = OPT->getPointeeType(); 2804 if (!EncodingProperty && 2805 isa<TypedefType>(PointeeTy.getTypePtr())) { 2806 // Another historical/compatibility reason. 2807 // We encode the underlying type which comes out as 2808 // {...}; 2809 S += '^'; 2810 getObjCEncodingForTypeImpl(PointeeTy, S, 2811 false, ExpandPointedToStructures, 2812 NULL); 2813 return; 2814 } 2815 2816 S += '@'; 2817 if (FD || EncodingProperty) { 2818 S += '"'; 2819 S += OPT->getInterfaceDecl()->getNameAsCString(); 2820 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 2821 E = OPT->qual_end(); I != E; ++I) { 2822 S += '<'; 2823 S += (*I)->getNameAsString(); 2824 S += '>'; 2825 } 2826 S += '"'; 2827 } 2828 return; 2829 } 2830 2831 assert(0 && "@encode for type not implemented!"); 2832} 2833 2834void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 2835 std::string& S) const { 2836 if (QT & Decl::OBJC_TQ_In) 2837 S += 'n'; 2838 if (QT & Decl::OBJC_TQ_Inout) 2839 S += 'N'; 2840 if (QT & Decl::OBJC_TQ_Out) 2841 S += 'o'; 2842 if (QT & Decl::OBJC_TQ_Bycopy) 2843 S += 'O'; 2844 if (QT & Decl::OBJC_TQ_Byref) 2845 S += 'R'; 2846 if (QT & Decl::OBJC_TQ_Oneway) 2847 S += 'V'; 2848} 2849 2850void ASTContext::setBuiltinVaListType(QualType T) { 2851 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 2852 2853 BuiltinVaListType = T; 2854} 2855 2856void ASTContext::setObjCIdType(QualType T) { 2857 ObjCIdTypedefType = T; 2858} 2859 2860void ASTContext::setObjCSelType(QualType T) { 2861 ObjCSelType = T; 2862 2863 const TypedefType *TT = T->getAsTypedefType(); 2864 if (!TT) 2865 return; 2866 TypedefDecl *TD = TT->getDecl(); 2867 2868 // typedef struct objc_selector *SEL; 2869 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType(); 2870 if (!ptr) 2871 return; 2872 const RecordType *rec = ptr->getPointeeType()->getAsStructureType(); 2873 if (!rec) 2874 return; 2875 SelStructType = rec; 2876} 2877 2878void ASTContext::setObjCProtoType(QualType QT) { 2879 ObjCProtoType = QT; 2880} 2881 2882void ASTContext::setObjCClassType(QualType T) { 2883 ObjCClassTypedefType = T; 2884} 2885 2886void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 2887 assert(ObjCConstantStringType.isNull() && 2888 "'NSConstantString' type already set!"); 2889 2890 ObjCConstantStringType = getObjCInterfaceType(Decl); 2891} 2892 2893/// \brief Retrieve the template name that represents a qualified 2894/// template name such as \c std::vector. 2895TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 2896 bool TemplateKeyword, 2897 TemplateDecl *Template) { 2898 llvm::FoldingSetNodeID ID; 2899 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 2900 2901 void *InsertPos = 0; 2902 QualifiedTemplateName *QTN = 2903 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 2904 if (!QTN) { 2905 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 2906 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 2907 } 2908 2909 return TemplateName(QTN); 2910} 2911 2912/// \brief Retrieve the template name that represents a dependent 2913/// template name such as \c MetaFun::template apply. 2914TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 2915 const IdentifierInfo *Name) { 2916 assert(NNS->isDependent() && "Nested name specifier must be dependent"); 2917 2918 llvm::FoldingSetNodeID ID; 2919 DependentTemplateName::Profile(ID, NNS, Name); 2920 2921 void *InsertPos = 0; 2922 DependentTemplateName *QTN = 2923 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 2924 2925 if (QTN) 2926 return TemplateName(QTN); 2927 2928 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2929 if (CanonNNS == NNS) { 2930 QTN = new (*this,4) DependentTemplateName(NNS, Name); 2931 } else { 2932 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 2933 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 2934 } 2935 2936 DependentTemplateNames.InsertNode(QTN, InsertPos); 2937 return TemplateName(QTN); 2938} 2939 2940/// getFromTargetType - Given one of the integer types provided by 2941/// TargetInfo, produce the corresponding type. The unsigned @p Type 2942/// is actually a value of type @c TargetInfo::IntType. 2943QualType ASTContext::getFromTargetType(unsigned Type) const { 2944 switch (Type) { 2945 case TargetInfo::NoInt: return QualType(); 2946 case TargetInfo::SignedShort: return ShortTy; 2947 case TargetInfo::UnsignedShort: return UnsignedShortTy; 2948 case TargetInfo::SignedInt: return IntTy; 2949 case TargetInfo::UnsignedInt: return UnsignedIntTy; 2950 case TargetInfo::SignedLong: return LongTy; 2951 case TargetInfo::UnsignedLong: return UnsignedLongTy; 2952 case TargetInfo::SignedLongLong: return LongLongTy; 2953 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 2954 } 2955 2956 assert(false && "Unhandled TargetInfo::IntType value"); 2957 return QualType(); 2958} 2959 2960//===----------------------------------------------------------------------===// 2961// Type Predicates. 2962//===----------------------------------------------------------------------===// 2963 2964/// isObjCNSObjectType - Return true if this is an NSObject object using 2965/// NSObject attribute on a c-style pointer type. 2966/// FIXME - Make it work directly on types. 2967/// FIXME: Move to Type. 2968/// 2969bool ASTContext::isObjCNSObjectType(QualType Ty) const { 2970 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 2971 if (TypedefDecl *TD = TDT->getDecl()) 2972 if (TD->getAttr<ObjCNSObjectAttr>()) 2973 return true; 2974 } 2975 return false; 2976} 2977 2978/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 2979/// garbage collection attribute. 2980/// 2981QualType::GCAttrTypes ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 2982 QualType::GCAttrTypes GCAttrs = QualType::GCNone; 2983 if (getLangOptions().ObjC1 && 2984 getLangOptions().getGCMode() != LangOptions::NonGC) { 2985 GCAttrs = Ty.getObjCGCAttr(); 2986 // Default behavious under objective-c's gc is for objective-c pointers 2987 // (or pointers to them) be treated as though they were declared 2988 // as __strong. 2989 if (GCAttrs == QualType::GCNone) { 2990 if (Ty->isObjCObjectPointerType()) 2991 GCAttrs = QualType::Strong; 2992 else if (Ty->isPointerType()) 2993 return getObjCGCAttrKind(Ty->getAsPointerType()->getPointeeType()); 2994 } 2995 // Non-pointers have none gc'able attribute regardless of the attribute 2996 // set on them. 2997 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 2998 return QualType::GCNone; 2999 } 3000 return GCAttrs; 3001} 3002 3003//===----------------------------------------------------------------------===// 3004// Type Compatibility Testing 3005//===----------------------------------------------------------------------===// 3006 3007/// areCompatVectorTypes - Return true if the two specified vector types are 3008/// compatible. 3009static bool areCompatVectorTypes(const VectorType *LHS, 3010 const VectorType *RHS) { 3011 assert(LHS->isCanonical() && RHS->isCanonical()); 3012 return LHS->getElementType() == RHS->getElementType() && 3013 LHS->getNumElements() == RHS->getNumElements(); 3014} 3015 3016/// canAssignObjCInterfaces - Return true if the two interface types are 3017/// compatible for assignment from RHS to LHS. This handles validation of any 3018/// protocol qualifiers on the LHS or RHS. 3019/// 3020/// FIXME: Move the following to ObjCObjectPointerType/ObjCInterfaceType. 3021bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 3022 const ObjCObjectPointerType *RHSOPT) { 3023 // If either type represents the built-in 'id' or 'Class' types, return true. 3024 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 3025 return true; 3026 3027 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 3028 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 3029 if (!LHS || !RHS) { 3030 // We have qualified builtin types. 3031 // Both the right and left sides have qualifiers. 3032 for (ObjCObjectPointerType::qual_iterator I = LHSOPT->qual_begin(), 3033 E = LHSOPT->qual_end(); I != E; ++I) { 3034 bool RHSImplementsProtocol = false; 3035 3036 // when comparing an id<P> on lhs with a static type on rhs, 3037 // see if static class implements all of id's protocols, directly or 3038 // through its super class and categories. 3039 for (ObjCObjectPointerType::qual_iterator J = RHSOPT->qual_begin(), 3040 E = RHSOPT->qual_end(); J != E; ++J) { 3041 if ((*J)->lookupProtocolNamed((*I)->getIdentifier())) { 3042 RHSImplementsProtocol = true; 3043 break; 3044 } 3045 } 3046 if (!RHSImplementsProtocol) 3047 return false; 3048 } 3049 // The RHS implements all protocols listed on the LHS. 3050 return true; 3051 } 3052 return canAssignObjCInterfaces(LHS, RHS); 3053} 3054 3055bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 3056 const ObjCInterfaceType *RHS) { 3057 // Verify that the base decls are compatible: the RHS must be a subclass of 3058 // the LHS. 3059 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 3060 return false; 3061 3062 // RHS must have a superset of the protocols in the LHS. If the LHS is not 3063 // protocol qualified at all, then we are good. 3064 if (LHS->getNumProtocols() == 0) 3065 return true; 3066 3067 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 3068 // isn't a superset. 3069 if (RHS->getNumProtocols() == 0) 3070 return true; // FIXME: should return false! 3071 3072 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 3073 LHSPE = LHS->qual_end(); 3074 LHSPI != LHSPE; LHSPI++) { 3075 bool RHSImplementsProtocol = false; 3076 3077 // If the RHS doesn't implement the protocol on the left, the types 3078 // are incompatible. 3079 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 3080 RHSPE = RHS->qual_end(); 3081 RHSPI != RHSPE; RHSPI++) { 3082 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 3083 RHSImplementsProtocol = true; 3084 break; 3085 } 3086 } 3087 // FIXME: For better diagnostics, consider passing back the protocol name. 3088 if (!RHSImplementsProtocol) 3089 return false; 3090 } 3091 // The RHS implements all protocols listed on the LHS. 3092 return true; 3093} 3094 3095bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 3096 // get the "pointed to" types 3097 const ObjCObjectPointerType *LHSOPT = LHS->getAsObjCObjectPointerType(); 3098 const ObjCObjectPointerType *RHSOPT = RHS->getAsObjCObjectPointerType(); 3099 3100 if (!LHSOPT || !RHSOPT) 3101 return false; 3102 3103 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 3104 canAssignObjCInterfaces(RHSOPT, LHSOPT); 3105} 3106 3107/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 3108/// both shall have the identically qualified version of a compatible type. 3109/// C99 6.2.7p1: Two types have compatible types if their types are the 3110/// same. See 6.7.[2,3,5] for additional rules. 3111bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 3112 return !mergeTypes(LHS, RHS).isNull(); 3113} 3114 3115QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs) { 3116 const FunctionType *lbase = lhs->getAsFunctionType(); 3117 const FunctionType *rbase = rhs->getAsFunctionType(); 3118 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 3119 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 3120 bool allLTypes = true; 3121 bool allRTypes = true; 3122 3123 // Check return type 3124 QualType retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 3125 if (retType.isNull()) return QualType(); 3126 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 3127 allLTypes = false; 3128 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 3129 allRTypes = false; 3130 3131 if (lproto && rproto) { // two C99 style function prototypes 3132 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 3133 "C++ shouldn't be here"); 3134 unsigned lproto_nargs = lproto->getNumArgs(); 3135 unsigned rproto_nargs = rproto->getNumArgs(); 3136 3137 // Compatible functions must have the same number of arguments 3138 if (lproto_nargs != rproto_nargs) 3139 return QualType(); 3140 3141 // Variadic and non-variadic functions aren't compatible 3142 if (lproto->isVariadic() != rproto->isVariadic()) 3143 return QualType(); 3144 3145 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 3146 return QualType(); 3147 3148 // Check argument compatibility 3149 llvm::SmallVector<QualType, 10> types; 3150 for (unsigned i = 0; i < lproto_nargs; i++) { 3151 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 3152 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 3153 QualType argtype = mergeTypes(largtype, rargtype); 3154 if (argtype.isNull()) return QualType(); 3155 types.push_back(argtype); 3156 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 3157 allLTypes = false; 3158 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 3159 allRTypes = false; 3160 } 3161 if (allLTypes) return lhs; 3162 if (allRTypes) return rhs; 3163 return getFunctionType(retType, types.begin(), types.size(), 3164 lproto->isVariadic(), lproto->getTypeQuals()); 3165 } 3166 3167 if (lproto) allRTypes = false; 3168 if (rproto) allLTypes = false; 3169 3170 const FunctionProtoType *proto = lproto ? lproto : rproto; 3171 if (proto) { 3172 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 3173 if (proto->isVariadic()) return QualType(); 3174 // Check that the types are compatible with the types that 3175 // would result from default argument promotions (C99 6.7.5.3p15). 3176 // The only types actually affected are promotable integer 3177 // types and floats, which would be passed as a different 3178 // type depending on whether the prototype is visible. 3179 unsigned proto_nargs = proto->getNumArgs(); 3180 for (unsigned i = 0; i < proto_nargs; ++i) { 3181 QualType argTy = proto->getArgType(i); 3182 if (argTy->isPromotableIntegerType() || 3183 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 3184 return QualType(); 3185 } 3186 3187 if (allLTypes) return lhs; 3188 if (allRTypes) return rhs; 3189 return getFunctionType(retType, proto->arg_type_begin(), 3190 proto->getNumArgs(), lproto->isVariadic(), 3191 lproto->getTypeQuals()); 3192 } 3193 3194 if (allLTypes) return lhs; 3195 if (allRTypes) return rhs; 3196 return getFunctionNoProtoType(retType); 3197} 3198 3199QualType ASTContext::mergeTypes(QualType LHS, QualType RHS) { 3200 // C++ [expr]: If an expression initially has the type "reference to T", the 3201 // type is adjusted to "T" prior to any further analysis, the expression 3202 // designates the object or function denoted by the reference, and the 3203 // expression is an lvalue unless the reference is an rvalue reference and 3204 // the expression is a function call (possibly inside parentheses). 3205 // FIXME: C++ shouldn't be going through here! The rules are different 3206 // enough that they should be handled separately. 3207 // FIXME: Merging of lvalue and rvalue references is incorrect. C++ *really* 3208 // shouldn't be going through here! 3209 if (const ReferenceType *RT = LHS->getAsReferenceType()) 3210 LHS = RT->getPointeeType(); 3211 if (const ReferenceType *RT = RHS->getAsReferenceType()) 3212 RHS = RT->getPointeeType(); 3213 3214 QualType LHSCan = getCanonicalType(LHS), 3215 RHSCan = getCanonicalType(RHS); 3216 3217 // If two types are identical, they are compatible. 3218 if (LHSCan == RHSCan) 3219 return LHS; 3220 3221 // If the qualifiers are different, the types aren't compatible 3222 // Note that we handle extended qualifiers later, in the 3223 // case for ExtQualType. 3224 if (LHSCan.getCVRQualifiers() != RHSCan.getCVRQualifiers()) 3225 return QualType(); 3226 3227 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 3228 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 3229 3230 // We want to consider the two function types to be the same for these 3231 // comparisons, just force one to the other. 3232 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 3233 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 3234 3235 // Strip off objc_gc attributes off the top level so they can be merged. 3236 // This is a complete mess, but the attribute itself doesn't make much sense. 3237 if (RHSClass == Type::ExtQual) { 3238 QualType::GCAttrTypes GCAttr = RHSCan.getObjCGCAttr(); 3239 if (GCAttr != QualType::GCNone) { 3240 QualType::GCAttrTypes GCLHSAttr = LHSCan.getObjCGCAttr(); 3241 // __weak attribute must appear on both declarations. 3242 // __strong attribue is redundant if other decl is an objective-c 3243 // object pointer (or decorated with __strong attribute); otherwise 3244 // issue error. 3245 if ((GCAttr == QualType::Weak && GCLHSAttr != GCAttr) || 3246 (GCAttr == QualType::Strong && GCLHSAttr != GCAttr && 3247 !LHSCan->isObjCObjectPointerType())) 3248 return QualType(); 3249 3250 RHS = QualType(cast<ExtQualType>(RHS.getDesugaredType())->getBaseType(), 3251 RHS.getCVRQualifiers()); 3252 QualType Result = mergeTypes(LHS, RHS); 3253 if (!Result.isNull()) { 3254 if (Result.getObjCGCAttr() == QualType::GCNone) 3255 Result = getObjCGCQualType(Result, GCAttr); 3256 else if (Result.getObjCGCAttr() != GCAttr) 3257 Result = QualType(); 3258 } 3259 return Result; 3260 } 3261 } 3262 if (LHSClass == Type::ExtQual) { 3263 QualType::GCAttrTypes GCAttr = LHSCan.getObjCGCAttr(); 3264 if (GCAttr != QualType::GCNone) { 3265 QualType::GCAttrTypes GCRHSAttr = RHSCan.getObjCGCAttr(); 3266 // __weak attribute must appear on both declarations. __strong 3267 // __strong attribue is redundant if other decl is an objective-c 3268 // object pointer (or decorated with __strong attribute); otherwise 3269 // issue error. 3270 if ((GCAttr == QualType::Weak && GCRHSAttr != GCAttr) || 3271 (GCAttr == QualType::Strong && GCRHSAttr != GCAttr && 3272 !RHSCan->isObjCObjectPointerType())) 3273 return QualType(); 3274 3275 LHS = QualType(cast<ExtQualType>(LHS.getDesugaredType())->getBaseType(), 3276 LHS.getCVRQualifiers()); 3277 QualType Result = mergeTypes(LHS, RHS); 3278 if (!Result.isNull()) { 3279 if (Result.getObjCGCAttr() == QualType::GCNone) 3280 Result = getObjCGCQualType(Result, GCAttr); 3281 else if (Result.getObjCGCAttr() != GCAttr) 3282 Result = QualType(); 3283 } 3284 return Result; 3285 } 3286 } 3287 3288 // Same as above for arrays 3289 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 3290 LHSClass = Type::ConstantArray; 3291 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 3292 RHSClass = Type::ConstantArray; 3293 3294 // Canonicalize ExtVector -> Vector. 3295 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 3296 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 3297 3298 // If the canonical type classes don't match. 3299 if (LHSClass != RHSClass) { 3300 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 3301 // a signed integer type, or an unsigned integer type. 3302 if (const EnumType* ETy = LHS->getAsEnumType()) { 3303 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 3304 return RHS; 3305 } 3306 if (const EnumType* ETy = RHS->getAsEnumType()) { 3307 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 3308 return LHS; 3309 } 3310 3311 return QualType(); 3312 } 3313 3314 // The canonical type classes match. 3315 switch (LHSClass) { 3316#define TYPE(Class, Base) 3317#define ABSTRACT_TYPE(Class, Base) 3318#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 3319#define DEPENDENT_TYPE(Class, Base) case Type::Class: 3320#include "clang/AST/TypeNodes.def" 3321 assert(false && "Non-canonical and dependent types shouldn't get here"); 3322 return QualType(); 3323 3324 case Type::LValueReference: 3325 case Type::RValueReference: 3326 case Type::MemberPointer: 3327 assert(false && "C++ should never be in mergeTypes"); 3328 return QualType(); 3329 3330 case Type::IncompleteArray: 3331 case Type::VariableArray: 3332 case Type::FunctionProto: 3333 case Type::ExtVector: 3334 assert(false && "Types are eliminated above"); 3335 return QualType(); 3336 3337 case Type::Pointer: 3338 { 3339 // Merge two pointer types, while trying to preserve typedef info 3340 QualType LHSPointee = LHS->getAsPointerType()->getPointeeType(); 3341 QualType RHSPointee = RHS->getAsPointerType()->getPointeeType(); 3342 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 3343 if (ResultType.isNull()) return QualType(); 3344 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 3345 return LHS; 3346 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 3347 return RHS; 3348 return getPointerType(ResultType); 3349 } 3350 case Type::BlockPointer: 3351 { 3352 // Merge two block pointer types, while trying to preserve typedef info 3353 QualType LHSPointee = LHS->getAsBlockPointerType()->getPointeeType(); 3354 QualType RHSPointee = RHS->getAsBlockPointerType()->getPointeeType(); 3355 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 3356 if (ResultType.isNull()) return QualType(); 3357 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 3358 return LHS; 3359 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 3360 return RHS; 3361 return getBlockPointerType(ResultType); 3362 } 3363 case Type::ConstantArray: 3364 { 3365 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 3366 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 3367 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 3368 return QualType(); 3369 3370 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 3371 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 3372 QualType ResultType = mergeTypes(LHSElem, RHSElem); 3373 if (ResultType.isNull()) return QualType(); 3374 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 3375 return LHS; 3376 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 3377 return RHS; 3378 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 3379 ArrayType::ArraySizeModifier(), 0); 3380 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 3381 ArrayType::ArraySizeModifier(), 0); 3382 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 3383 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 3384 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 3385 return LHS; 3386 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 3387 return RHS; 3388 if (LVAT) { 3389 // FIXME: This isn't correct! But tricky to implement because 3390 // the array's size has to be the size of LHS, but the type 3391 // has to be different. 3392 return LHS; 3393 } 3394 if (RVAT) { 3395 // FIXME: This isn't correct! But tricky to implement because 3396 // the array's size has to be the size of RHS, but the type 3397 // has to be different. 3398 return RHS; 3399 } 3400 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 3401 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 3402 return getIncompleteArrayType(ResultType, 3403 ArrayType::ArraySizeModifier(), 0); 3404 } 3405 case Type::FunctionNoProto: 3406 return mergeFunctionTypes(LHS, RHS); 3407 case Type::Record: 3408 case Type::Enum: 3409 return QualType(); 3410 case Type::Builtin: 3411 // Only exactly equal builtin types are compatible, which is tested above. 3412 return QualType(); 3413 case Type::Complex: 3414 // Distinct complex types are incompatible. 3415 return QualType(); 3416 case Type::Vector: 3417 // FIXME: The merged type should be an ExtVector! 3418 if (areCompatVectorTypes(LHS->getAsVectorType(), RHS->getAsVectorType())) 3419 return LHS; 3420 return QualType(); 3421 case Type::ObjCInterface: { 3422 // Check if the interfaces are assignment compatible. 3423 // FIXME: This should be type compatibility, e.g. whether 3424 // "LHS x; RHS x;" at global scope is legal. 3425 const ObjCInterfaceType* LHSIface = LHS->getAsObjCInterfaceType(); 3426 const ObjCInterfaceType* RHSIface = RHS->getAsObjCInterfaceType(); 3427 if (LHSIface && RHSIface && 3428 canAssignObjCInterfaces(LHSIface, RHSIface)) 3429 return LHS; 3430 3431 return QualType(); 3432 } 3433 case Type::ObjCObjectPointer: { 3434 // FIXME: Incorporate tests from Sema::ObjCQualifiedIdTypesAreCompatible(). 3435 if (LHS->isObjCQualifiedIdType() && RHS->isObjCQualifiedIdType()) 3436 return QualType(); 3437 3438 if (canAssignObjCInterfaces(LHS->getAsObjCObjectPointerType(), 3439 RHS->getAsObjCObjectPointerType())) 3440 return LHS; 3441 3442 return QualType(); 3443 } 3444 case Type::FixedWidthInt: 3445 // Distinct fixed-width integers are not compatible. 3446 return QualType(); 3447 case Type::ExtQual: 3448 // FIXME: ExtQual types can be compatible even if they're not 3449 // identical! 3450 return QualType(); 3451 // First attempt at an implementation, but I'm not really sure it's 3452 // right... 3453#if 0 3454 ExtQualType* LQual = cast<ExtQualType>(LHSCan); 3455 ExtQualType* RQual = cast<ExtQualType>(RHSCan); 3456 if (LQual->getAddressSpace() != RQual->getAddressSpace() || 3457 LQual->getObjCGCAttr() != RQual->getObjCGCAttr()) 3458 return QualType(); 3459 QualType LHSBase, RHSBase, ResultType, ResCanUnqual; 3460 LHSBase = QualType(LQual->getBaseType(), 0); 3461 RHSBase = QualType(RQual->getBaseType(), 0); 3462 ResultType = mergeTypes(LHSBase, RHSBase); 3463 if (ResultType.isNull()) return QualType(); 3464 ResCanUnqual = getCanonicalType(ResultType).getUnqualifiedType(); 3465 if (LHSCan.getUnqualifiedType() == ResCanUnqual) 3466 return LHS; 3467 if (RHSCan.getUnqualifiedType() == ResCanUnqual) 3468 return RHS; 3469 ResultType = getAddrSpaceQualType(ResultType, LQual->getAddressSpace()); 3470 ResultType = getObjCGCQualType(ResultType, LQual->getObjCGCAttr()); 3471 ResultType.setCVRQualifiers(LHSCan.getCVRQualifiers()); 3472 return ResultType; 3473#endif 3474 3475 case Type::TemplateSpecialization: 3476 assert(false && "Dependent types have no size"); 3477 break; 3478 } 3479 3480 return QualType(); 3481} 3482 3483//===----------------------------------------------------------------------===// 3484// Integer Predicates 3485//===----------------------------------------------------------------------===// 3486 3487unsigned ASTContext::getIntWidth(QualType T) { 3488 if (T == BoolTy) 3489 return 1; 3490 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) { 3491 return FWIT->getWidth(); 3492 } 3493 // For builtin types, just use the standard type sizing method 3494 return (unsigned)getTypeSize(T); 3495} 3496 3497QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 3498 assert(T->isSignedIntegerType() && "Unexpected type"); 3499 if (const EnumType* ETy = T->getAsEnumType()) 3500 T = ETy->getDecl()->getIntegerType(); 3501 const BuiltinType* BTy = T->getAsBuiltinType(); 3502 assert (BTy && "Unexpected signed integer type"); 3503 switch (BTy->getKind()) { 3504 case BuiltinType::Char_S: 3505 case BuiltinType::SChar: 3506 return UnsignedCharTy; 3507 case BuiltinType::Short: 3508 return UnsignedShortTy; 3509 case BuiltinType::Int: 3510 return UnsignedIntTy; 3511 case BuiltinType::Long: 3512 return UnsignedLongTy; 3513 case BuiltinType::LongLong: 3514 return UnsignedLongLongTy; 3515 case BuiltinType::Int128: 3516 return UnsignedInt128Ty; 3517 default: 3518 assert(0 && "Unexpected signed integer type"); 3519 return QualType(); 3520 } 3521} 3522 3523ExternalASTSource::~ExternalASTSource() { } 3524 3525void ExternalASTSource::PrintStats() { } 3526 3527 3528//===----------------------------------------------------------------------===// 3529// Builtin Type Computation 3530//===----------------------------------------------------------------------===// 3531 3532/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 3533/// pointer over the consumed characters. This returns the resultant type. 3534static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 3535 ASTContext::GetBuiltinTypeError &Error, 3536 bool AllowTypeModifiers = true) { 3537 // Modifiers. 3538 int HowLong = 0; 3539 bool Signed = false, Unsigned = false; 3540 3541 // Read the modifiers first. 3542 bool Done = false; 3543 while (!Done) { 3544 switch (*Str++) { 3545 default: Done = true; --Str; break; 3546 case 'S': 3547 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 3548 assert(!Signed && "Can't use 'S' modifier multiple times!"); 3549 Signed = true; 3550 break; 3551 case 'U': 3552 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 3553 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 3554 Unsigned = true; 3555 break; 3556 case 'L': 3557 assert(HowLong <= 2 && "Can't have LLLL modifier"); 3558 ++HowLong; 3559 break; 3560 } 3561 } 3562 3563 QualType Type; 3564 3565 // Read the base type. 3566 switch (*Str++) { 3567 default: assert(0 && "Unknown builtin type letter!"); 3568 case 'v': 3569 assert(HowLong == 0 && !Signed && !Unsigned && 3570 "Bad modifiers used with 'v'!"); 3571 Type = Context.VoidTy; 3572 break; 3573 case 'f': 3574 assert(HowLong == 0 && !Signed && !Unsigned && 3575 "Bad modifiers used with 'f'!"); 3576 Type = Context.FloatTy; 3577 break; 3578 case 'd': 3579 assert(HowLong < 2 && !Signed && !Unsigned && 3580 "Bad modifiers used with 'd'!"); 3581 if (HowLong) 3582 Type = Context.LongDoubleTy; 3583 else 3584 Type = Context.DoubleTy; 3585 break; 3586 case 's': 3587 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 3588 if (Unsigned) 3589 Type = Context.UnsignedShortTy; 3590 else 3591 Type = Context.ShortTy; 3592 break; 3593 case 'i': 3594 if (HowLong == 3) 3595 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 3596 else if (HowLong == 2) 3597 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 3598 else if (HowLong == 1) 3599 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 3600 else 3601 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 3602 break; 3603 case 'c': 3604 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 3605 if (Signed) 3606 Type = Context.SignedCharTy; 3607 else if (Unsigned) 3608 Type = Context.UnsignedCharTy; 3609 else 3610 Type = Context.CharTy; 3611 break; 3612 case 'b': // boolean 3613 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 3614 Type = Context.BoolTy; 3615 break; 3616 case 'z': // size_t. 3617 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 3618 Type = Context.getSizeType(); 3619 break; 3620 case 'F': 3621 Type = Context.getCFConstantStringType(); 3622 break; 3623 case 'a': 3624 Type = Context.getBuiltinVaListType(); 3625 assert(!Type.isNull() && "builtin va list type not initialized!"); 3626 break; 3627 case 'A': 3628 // This is a "reference" to a va_list; however, what exactly 3629 // this means depends on how va_list is defined. There are two 3630 // different kinds of va_list: ones passed by value, and ones 3631 // passed by reference. An example of a by-value va_list is 3632 // x86, where va_list is a char*. An example of by-ref va_list 3633 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 3634 // we want this argument to be a char*&; for x86-64, we want 3635 // it to be a __va_list_tag*. 3636 Type = Context.getBuiltinVaListType(); 3637 assert(!Type.isNull() && "builtin va list type not initialized!"); 3638 if (Type->isArrayType()) { 3639 Type = Context.getArrayDecayedType(Type); 3640 } else { 3641 Type = Context.getLValueReferenceType(Type); 3642 } 3643 break; 3644 case 'V': { 3645 char *End; 3646 3647 unsigned NumElements = strtoul(Str, &End, 10); 3648 assert(End != Str && "Missing vector size"); 3649 3650 Str = End; 3651 3652 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 3653 Type = Context.getVectorType(ElementType, NumElements); 3654 break; 3655 } 3656 case 'P': { 3657 Type = Context.getFILEType(); 3658 if (Type.isNull()) { 3659 Error = ASTContext::GE_Missing_FILE; 3660 return QualType(); 3661 } else { 3662 break; 3663 } 3664 } 3665 } 3666 3667 if (!AllowTypeModifiers) 3668 return Type; 3669 3670 Done = false; 3671 while (!Done) { 3672 switch (*Str++) { 3673 default: Done = true; --Str; break; 3674 case '*': 3675 Type = Context.getPointerType(Type); 3676 break; 3677 case '&': 3678 Type = Context.getLValueReferenceType(Type); 3679 break; 3680 // FIXME: There's no way to have a built-in with an rvalue ref arg. 3681 case 'C': 3682 Type = Type.getQualifiedType(QualType::Const); 3683 break; 3684 } 3685 } 3686 3687 return Type; 3688} 3689 3690/// GetBuiltinType - Return the type for the specified builtin. 3691QualType ASTContext::GetBuiltinType(unsigned id, 3692 GetBuiltinTypeError &Error) { 3693 const char *TypeStr = BuiltinInfo.GetTypeString(id); 3694 3695 llvm::SmallVector<QualType, 8> ArgTypes; 3696 3697 Error = GE_None; 3698 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 3699 if (Error != GE_None) 3700 return QualType(); 3701 while (TypeStr[0] && TypeStr[0] != '.') { 3702 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 3703 if (Error != GE_None) 3704 return QualType(); 3705 3706 // Do array -> pointer decay. The builtin should use the decayed type. 3707 if (Ty->isArrayType()) 3708 Ty = getArrayDecayedType(Ty); 3709 3710 ArgTypes.push_back(Ty); 3711 } 3712 3713 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 3714 "'.' should only occur at end of builtin type list!"); 3715 3716 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 3717 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 3718 return getFunctionNoProtoType(ResType); 3719 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 3720 TypeStr[0] == '.', 0); 3721} 3722