ASTContext.cpp revision f49545602089be5b1f744e04326b8a566f6d8773
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/ASTRecordLayout.h" 16#include "clang/AST/DeclCXX.h" 17#include "clang/AST/DeclObjC.h" 18#include "clang/AST/DeclTemplate.h" 19#include "clang/AST/Expr.h" 20#include "clang/AST/ExternalASTSource.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" 27using namespace clang; 28 29enum FloatingRank { 30 FloatRank, DoubleRank, LongDoubleRank 31}; 32 33ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 34 TargetInfo &t, 35 IdentifierTable &idents, SelectorTable &sels, 36 Builtin::Context &builtins, 37 bool FreeMem, unsigned size_reserve) : 38 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 39 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), 40 SourceMgr(SM), LangOpts(LOpts), 41 LoadedExternalComments(false), FreeMemory(FreeMem), Target(t), 42 Idents(idents), Selectors(sels), 43 BuiltinInfo(builtins), ExternalSource(0), PrintingPolicy(LOpts) { 44 if (size_reserve > 0) Types.reserve(size_reserve); 45 TUDecl = TranslationUnitDecl::Create(*this); 46 InitBuiltinTypes(); 47} 48 49ASTContext::~ASTContext() { 50 // Deallocate all the types. 51 while (!Types.empty()) { 52 Types.back()->Destroy(*this); 53 Types.pop_back(); 54 } 55 56 { 57 llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 58 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); 59 while (I != E) { 60 ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 61 delete R; 62 } 63 } 64 65 { 66 llvm::DenseMap<const ObjCContainerDecl*, const ASTRecordLayout*>::iterator 67 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); 68 while (I != E) { 69 ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second); 70 delete R; 71 } 72 } 73 74 // Destroy nested-name-specifiers. 75 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 76 NNS = NestedNameSpecifiers.begin(), 77 NNSEnd = NestedNameSpecifiers.end(); 78 NNS != NNSEnd; 79 /* Increment in loop */) 80 (*NNS++).Destroy(*this); 81 82 if (GlobalNestedNameSpecifier) 83 GlobalNestedNameSpecifier->Destroy(*this); 84 85 TUDecl->Destroy(*this); 86} 87 88void 89ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 90 ExternalSource.reset(Source.take()); 91} 92 93void ASTContext::PrintStats() const { 94 fprintf(stderr, "*** AST Context Stats:\n"); 95 fprintf(stderr, " %d types total.\n", (int)Types.size()); 96 97 unsigned counts[] = { 98#define TYPE(Name, Parent) 0, 99#define ABSTRACT_TYPE(Name, Parent) 100#include "clang/AST/TypeNodes.def" 101 0 // Extra 102 }; 103 104 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 105 Type *T = Types[i]; 106 counts[(unsigned)T->getTypeClass()]++; 107 } 108 109 unsigned Idx = 0; 110 unsigned TotalBytes = 0; 111#define TYPE(Name, Parent) \ 112 if (counts[Idx]) \ 113 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 114 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 115 ++Idx; 116#define ABSTRACT_TYPE(Name, Parent) 117#include "clang/AST/TypeNodes.def" 118 119 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 120 121 if (ExternalSource.get()) { 122 fprintf(stderr, "\n"); 123 ExternalSource->PrintStats(); 124 } 125} 126 127 128void ASTContext::InitBuiltinType(QualType &R, BuiltinType::Kind K) { 129 Types.push_back((R = QualType(new (*this,8) BuiltinType(K),0)).getTypePtr()); 130} 131 132void ASTContext::InitBuiltinTypes() { 133 assert(VoidTy.isNull() && "Context reinitialized?"); 134 135 // C99 6.2.5p19. 136 InitBuiltinType(VoidTy, BuiltinType::Void); 137 138 // C99 6.2.5p2. 139 InitBuiltinType(BoolTy, BuiltinType::Bool); 140 // C99 6.2.5p3. 141 if (LangOpts.CharIsSigned) 142 InitBuiltinType(CharTy, BuiltinType::Char_S); 143 else 144 InitBuiltinType(CharTy, BuiltinType::Char_U); 145 // C99 6.2.5p4. 146 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 147 InitBuiltinType(ShortTy, BuiltinType::Short); 148 InitBuiltinType(IntTy, BuiltinType::Int); 149 InitBuiltinType(LongTy, BuiltinType::Long); 150 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 151 152 // C99 6.2.5p6. 153 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 154 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 155 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 156 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 157 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 158 159 // C99 6.2.5p10. 160 InitBuiltinType(FloatTy, BuiltinType::Float); 161 InitBuiltinType(DoubleTy, BuiltinType::Double); 162 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 163 164 // GNU extension, 128-bit integers. 165 InitBuiltinType(Int128Ty, BuiltinType::Int128); 166 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 167 168 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 169 InitBuiltinType(WCharTy, BuiltinType::WChar); 170 else // C99 171 WCharTy = getFromTargetType(Target.getWCharType()); 172 173 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 174 InitBuiltinType(Char16Ty, BuiltinType::Char16); 175 else // C99 176 Char16Ty = getFromTargetType(Target.getChar16Type()); 177 178 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 179 InitBuiltinType(Char32Ty, BuiltinType::Char32); 180 else // C99 181 Char32Ty = getFromTargetType(Target.getChar32Type()); 182 183 // Placeholder type for functions. 184 InitBuiltinType(OverloadTy, BuiltinType::Overload); 185 186 // Placeholder type for type-dependent expressions whose type is 187 // completely unknown. No code should ever check a type against 188 // DependentTy and users should never see it; however, it is here to 189 // help diagnose failures to properly check for type-dependent 190 // expressions. 191 InitBuiltinType(DependentTy, BuiltinType::Dependent); 192 193 // Placeholder type for C++0x auto declarations whose real type has 194 // not yet been deduced. 195 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 196 197 // C99 6.2.5p11. 198 FloatComplexTy = getComplexType(FloatTy); 199 DoubleComplexTy = getComplexType(DoubleTy); 200 LongDoubleComplexTy = getComplexType(LongDoubleTy); 201 202 BuiltinVaListType = QualType(); 203 204 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 205 ObjCIdTypedefType = QualType(); 206 ObjCClassTypedefType = QualType(); 207 208 // Builtin types for 'id' and 'Class'. 209 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 210 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 211 212 ObjCConstantStringType = QualType(); 213 214 // void * type 215 VoidPtrTy = getPointerType(VoidTy); 216 217 // nullptr type (C++0x 2.14.7) 218 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 219} 220 221namespace { 222 class BeforeInTranslationUnit 223 : std::binary_function<SourceRange, SourceRange, bool> { 224 SourceManager *SourceMgr; 225 226 public: 227 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 228 229 bool operator()(SourceRange X, SourceRange Y) { 230 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 231 } 232 }; 233} 234 235/// \brief Determine whether the given comment is a Doxygen-style comment. 236/// 237/// \param Start the start of the comment text. 238/// 239/// \param End the end of the comment text. 240/// 241/// \param Member whether we want to check whether this is a member comment 242/// (which requires a < after the Doxygen-comment delimiter). Otherwise, 243/// we only return true when we find a non-member comment. 244static bool 245isDoxygenComment(SourceManager &SourceMgr, SourceRange Comment, 246 bool Member = false) { 247 const char *BufferStart 248 = SourceMgr.getBufferData(SourceMgr.getFileID(Comment.getBegin())).first; 249 const char *Start = BufferStart + SourceMgr.getFileOffset(Comment.getBegin()); 250 const char* End = BufferStart + SourceMgr.getFileOffset(Comment.getEnd()); 251 252 if (End - Start < 4) 253 return false; 254 255 assert(Start[0] == '/' && "Not a comment?"); 256 if (Start[1] == '*' && !(Start[2] == '!' || Start[2] == '*')) 257 return false; 258 if (Start[1] == '/' && !(Start[2] == '!' || Start[2] == '/')) 259 return false; 260 261 return (Start[3] == '<') == Member; 262} 263 264/// \brief Retrieve the comment associated with the given declaration, if 265/// it has one. 266const char *ASTContext::getCommentForDecl(const Decl *D) { 267 if (!D) 268 return 0; 269 270 // Check whether we have cached a comment string for this declaration 271 // already. 272 llvm::DenseMap<const Decl *, std::string>::iterator Pos 273 = DeclComments.find(D); 274 if (Pos != DeclComments.end()) 275 return Pos->second.c_str(); 276 277 // If we have an external AST source and have not yet loaded comments from 278 // that source, do so now. 279 if (ExternalSource && !LoadedExternalComments) { 280 std::vector<SourceRange> LoadedComments; 281 ExternalSource->ReadComments(LoadedComments); 282 283 if (!LoadedComments.empty()) 284 Comments.insert(Comments.begin(), LoadedComments.begin(), 285 LoadedComments.end()); 286 287 LoadedExternalComments = true; 288 } 289 290 // If there are no comments anywhere, we won't find anything. 291 if (Comments.empty()) 292 return 0; 293 294 // If the declaration doesn't map directly to a location in a file, we 295 // can't find the comment. 296 SourceLocation DeclStartLoc = D->getLocStart(); 297 if (DeclStartLoc.isInvalid() || !DeclStartLoc.isFileID()) 298 return 0; 299 300 // Find the comment that occurs just before this declaration. 301 std::vector<SourceRange>::iterator LastComment 302 = std::lower_bound(Comments.begin(), Comments.end(), 303 SourceRange(DeclStartLoc), 304 BeforeInTranslationUnit(&SourceMgr)); 305 306 // Decompose the location for the start of the declaration and find the 307 // beginning of the file buffer. 308 std::pair<FileID, unsigned> DeclStartDecomp 309 = SourceMgr.getDecomposedLoc(DeclStartLoc); 310 const char *FileBufferStart 311 = SourceMgr.getBufferData(DeclStartDecomp.first).first; 312 313 // First check whether we have a comment for a member. 314 if (LastComment != Comments.end() && 315 !isa<TagDecl>(D) && !isa<NamespaceDecl>(D) && 316 isDoxygenComment(SourceMgr, *LastComment, true)) { 317 std::pair<FileID, unsigned> LastCommentEndDecomp 318 = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 319 if (DeclStartDecomp.first == LastCommentEndDecomp.first && 320 SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second) 321 == SourceMgr.getLineNumber(LastCommentEndDecomp.first, 322 LastCommentEndDecomp.second)) { 323 // The Doxygen member comment comes after the declaration starts and 324 // is on the same line and in the same file as the declaration. This 325 // is the comment we want. 326 std::string &Result = DeclComments[D]; 327 Result.append(FileBufferStart + 328 SourceMgr.getFileOffset(LastComment->getBegin()), 329 FileBufferStart + LastCommentEndDecomp.second + 1); 330 return Result.c_str(); 331 } 332 } 333 334 if (LastComment == Comments.begin()) 335 return 0; 336 --LastComment; 337 338 // Decompose the end of the comment. 339 std::pair<FileID, unsigned> LastCommentEndDecomp 340 = SourceMgr.getDecomposedLoc(LastComment->getEnd()); 341 342 // If the comment and the declaration aren't in the same file, then they 343 // aren't related. 344 if (DeclStartDecomp.first != LastCommentEndDecomp.first) 345 return 0; 346 347 // Check that we actually have a Doxygen comment. 348 if (!isDoxygenComment(SourceMgr, *LastComment)) 349 return 0; 350 351 // Compute the starting line for the declaration and for the end of the 352 // comment (this is expensive). 353 unsigned DeclStartLine 354 = SourceMgr.getLineNumber(DeclStartDecomp.first, DeclStartDecomp.second); 355 unsigned CommentEndLine 356 = SourceMgr.getLineNumber(LastCommentEndDecomp.first, 357 LastCommentEndDecomp.second); 358 359 // If the comment does not end on the line prior to the declaration, then 360 // the comment is not associated with the declaration at all. 361 if (CommentEndLine + 1 != DeclStartLine) 362 return 0; 363 364 // We have a comment, but there may be more comments on the previous lines. 365 // Keep looking so long as the comments are still Doxygen comments and are 366 // still adjacent. 367 unsigned ExpectedLine 368 = SourceMgr.getSpellingLineNumber(LastComment->getBegin()) - 1; 369 std::vector<SourceRange>::iterator FirstComment = LastComment; 370 while (FirstComment != Comments.begin()) { 371 // Look at the previous comment 372 --FirstComment; 373 std::pair<FileID, unsigned> Decomp 374 = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 375 376 // If this previous comment is in a different file, we're done. 377 if (Decomp.first != DeclStartDecomp.first) { 378 ++FirstComment; 379 break; 380 } 381 382 // If this comment is not a Doxygen comment, we're done. 383 if (!isDoxygenComment(SourceMgr, *FirstComment)) { 384 ++FirstComment; 385 break; 386 } 387 388 // If the line number is not what we expected, we're done. 389 unsigned Line = SourceMgr.getLineNumber(Decomp.first, Decomp.second); 390 if (Line != ExpectedLine) { 391 ++FirstComment; 392 break; 393 } 394 395 // Set the next expected line number. 396 ExpectedLine 397 = SourceMgr.getSpellingLineNumber(FirstComment->getBegin()) - 1; 398 } 399 400 // The iterator range [FirstComment, LastComment] contains all of the 401 // BCPL comments that, together, are associated with this declaration. 402 // Form a single comment block string for this declaration that concatenates 403 // all of these comments. 404 std::string &Result = DeclComments[D]; 405 while (FirstComment != LastComment) { 406 std::pair<FileID, unsigned> DecompStart 407 = SourceMgr.getDecomposedLoc(FirstComment->getBegin()); 408 std::pair<FileID, unsigned> DecompEnd 409 = SourceMgr.getDecomposedLoc(FirstComment->getEnd()); 410 Result.append(FileBufferStart + DecompStart.second, 411 FileBufferStart + DecompEnd.second + 1); 412 ++FirstComment; 413 } 414 415 // Append the last comment line. 416 Result.append(FileBufferStart + 417 SourceMgr.getFileOffset(LastComment->getBegin()), 418 FileBufferStart + LastCommentEndDecomp.second + 1); 419 return Result.c_str(); 420} 421 422//===----------------------------------------------------------------------===// 423// Type Sizing and Analysis 424//===----------------------------------------------------------------------===// 425 426/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 427/// scalar floating point type. 428const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 429 const BuiltinType *BT = T->getAsBuiltinType(); 430 assert(BT && "Not a floating point type!"); 431 switch (BT->getKind()) { 432 default: assert(0 && "Not a floating point type!"); 433 case BuiltinType::Float: return Target.getFloatFormat(); 434 case BuiltinType::Double: return Target.getDoubleFormat(); 435 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 436 } 437} 438 439/// getDeclAlign - Return a conservative estimate of the alignment of the 440/// specified decl. Note that bitfields do not have a valid alignment, so 441/// this method will assert on them. 442unsigned ASTContext::getDeclAlignInBytes(const Decl *D) { 443 unsigned Align = Target.getCharWidth(); 444 445 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 446 Align = std::max(Align, AA->getAlignment()); 447 448 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 449 QualType T = VD->getType(); 450 if (const ReferenceType* RT = T->getAsReferenceType()) { 451 unsigned AS = RT->getPointeeType().getAddressSpace(); 452 Align = Target.getPointerAlign(AS); 453 } else if (!T->isIncompleteType() && !T->isFunctionType()) { 454 // Incomplete or function types default to 1. 455 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 456 T = cast<ArrayType>(T)->getElementType(); 457 458 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 459 } 460 } 461 462 return Align / Target.getCharWidth(); 463} 464 465/// getTypeSize - Return the size of the specified type, in bits. This method 466/// does not work on incomplete types. 467std::pair<uint64_t, unsigned> 468ASTContext::getTypeInfo(const Type *T) { 469 uint64_t Width=0; 470 unsigned Align=8; 471 switch (T->getTypeClass()) { 472#define TYPE(Class, Base) 473#define ABSTRACT_TYPE(Class, Base) 474#define NON_CANONICAL_TYPE(Class, Base) 475#define DEPENDENT_TYPE(Class, Base) case Type::Class: 476#include "clang/AST/TypeNodes.def" 477 assert(false && "Should not see dependent types"); 478 break; 479 480 case Type::FunctionNoProto: 481 case Type::FunctionProto: 482 // GCC extension: alignof(function) = 32 bits 483 Width = 0; 484 Align = 32; 485 break; 486 487 case Type::IncompleteArray: 488 case Type::VariableArray: 489 Width = 0; 490 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 491 break; 492 493 case Type::ConstantArrayWithExpr: 494 case Type::ConstantArrayWithoutExpr: 495 case Type::ConstantArray: { 496 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 497 498 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 499 Width = EltInfo.first*CAT->getSize().getZExtValue(); 500 Align = EltInfo.second; 501 break; 502 } 503 case Type::ExtVector: 504 case Type::Vector: { 505 std::pair<uint64_t, unsigned> EltInfo = 506 getTypeInfo(cast<VectorType>(T)->getElementType()); 507 Width = EltInfo.first*cast<VectorType>(T)->getNumElements(); 508 Align = Width; 509 // If the alignment is not a power of 2, round up to the next power of 2. 510 // This happens for non-power-of-2 length vectors. 511 // FIXME: this should probably be a target property. 512 Align = 1 << llvm::Log2_32_Ceil(Align); 513 break; 514 } 515 516 case Type::Builtin: 517 switch (cast<BuiltinType>(T)->getKind()) { 518 default: assert(0 && "Unknown builtin type!"); 519 case BuiltinType::Void: 520 // GCC extension: alignof(void) = 8 bits. 521 Width = 0; 522 Align = 8; 523 break; 524 525 case BuiltinType::Bool: 526 Width = Target.getBoolWidth(); 527 Align = Target.getBoolAlign(); 528 break; 529 case BuiltinType::Char_S: 530 case BuiltinType::Char_U: 531 case BuiltinType::UChar: 532 case BuiltinType::SChar: 533 Width = Target.getCharWidth(); 534 Align = Target.getCharAlign(); 535 break; 536 case BuiltinType::WChar: 537 Width = Target.getWCharWidth(); 538 Align = Target.getWCharAlign(); 539 break; 540 case BuiltinType::Char16: 541 Width = Target.getChar16Width(); 542 Align = Target.getChar16Align(); 543 break; 544 case BuiltinType::Char32: 545 Width = Target.getChar32Width(); 546 Align = Target.getChar32Align(); 547 break; 548 case BuiltinType::UShort: 549 case BuiltinType::Short: 550 Width = Target.getShortWidth(); 551 Align = Target.getShortAlign(); 552 break; 553 case BuiltinType::UInt: 554 case BuiltinType::Int: 555 Width = Target.getIntWidth(); 556 Align = Target.getIntAlign(); 557 break; 558 case BuiltinType::ULong: 559 case BuiltinType::Long: 560 Width = Target.getLongWidth(); 561 Align = Target.getLongAlign(); 562 break; 563 case BuiltinType::ULongLong: 564 case BuiltinType::LongLong: 565 Width = Target.getLongLongWidth(); 566 Align = Target.getLongLongAlign(); 567 break; 568 case BuiltinType::Int128: 569 case BuiltinType::UInt128: 570 Width = 128; 571 Align = 128; // int128_t is 128-bit aligned on all targets. 572 break; 573 case BuiltinType::Float: 574 Width = Target.getFloatWidth(); 575 Align = Target.getFloatAlign(); 576 break; 577 case BuiltinType::Double: 578 Width = Target.getDoubleWidth(); 579 Align = Target.getDoubleAlign(); 580 break; 581 case BuiltinType::LongDouble: 582 Width = Target.getLongDoubleWidth(); 583 Align = Target.getLongDoubleAlign(); 584 break; 585 case BuiltinType::NullPtr: 586 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 587 Align = Target.getPointerAlign(0); // == sizeof(void*) 588 break; 589 } 590 break; 591 case Type::FixedWidthInt: 592 // FIXME: This isn't precisely correct; the width/alignment should depend 593 // on the available types for the target 594 Width = cast<FixedWidthIntType>(T)->getWidth(); 595 Width = std::max(llvm::NextPowerOf2(Width - 1), (uint64_t)8); 596 Align = Width; 597 break; 598 case Type::ExtQual: 599 // FIXME: Pointers into different addr spaces could have different sizes and 600 // alignment requirements: getPointerInfo should take an AddrSpace. 601 return getTypeInfo(QualType(cast<ExtQualType>(T)->getBaseType(), 0)); 602 case Type::ObjCObjectPointer: 603 case Type::ObjCQualifiedInterface: 604 Width = Target.getPointerWidth(0); 605 Align = Target.getPointerAlign(0); 606 break; 607 case Type::BlockPointer: { 608 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 609 Width = Target.getPointerWidth(AS); 610 Align = Target.getPointerAlign(AS); 611 break; 612 } 613 case Type::Pointer: { 614 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 615 Width = Target.getPointerWidth(AS); 616 Align = Target.getPointerAlign(AS); 617 break; 618 } 619 case Type::LValueReference: 620 case Type::RValueReference: 621 // "When applied to a reference or a reference type, the result is the size 622 // of the referenced type." C++98 5.3.3p2: expr.sizeof. 623 // FIXME: This is wrong for struct layout: a reference in a struct has 624 // pointer size. 625 return getTypeInfo(cast<ReferenceType>(T)->getPointeeType()); 626 case Type::MemberPointer: { 627 // FIXME: This is ABI dependent. We use the Itanium C++ ABI. 628 // http://www.codesourcery.com/public/cxx-abi/abi.html#member-pointers 629 // If we ever want to support other ABIs this needs to be abstracted. 630 631 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 632 std::pair<uint64_t, unsigned> PtrDiffInfo = 633 getTypeInfo(getPointerDiffType()); 634 Width = PtrDiffInfo.first; 635 if (Pointee->isFunctionType()) 636 Width *= 2; 637 Align = PtrDiffInfo.second; 638 break; 639 } 640 case Type::Complex: { 641 // Complex types have the same alignment as their elements, but twice the 642 // size. 643 std::pair<uint64_t, unsigned> EltInfo = 644 getTypeInfo(cast<ComplexType>(T)->getElementType()); 645 Width = EltInfo.first*2; 646 Align = EltInfo.second; 647 break; 648 } 649 case Type::ObjCInterface: { 650 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 651 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 652 Width = Layout.getSize(); 653 Align = Layout.getAlignment(); 654 break; 655 } 656 case Type::Record: 657 case Type::Enum: { 658 const TagType *TT = cast<TagType>(T); 659 660 if (TT->getDecl()->isInvalidDecl()) { 661 Width = 1; 662 Align = 1; 663 break; 664 } 665 666 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 667 return getTypeInfo(ET->getDecl()->getIntegerType()); 668 669 const RecordType *RT = cast<RecordType>(TT); 670 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 671 Width = Layout.getSize(); 672 Align = Layout.getAlignment(); 673 break; 674 } 675 676 case Type::Typedef: { 677 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 678 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 679 Align = Aligned->getAlignment(); 680 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 681 } else 682 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 683 break; 684 } 685 686 case Type::TypeOfExpr: 687 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 688 .getTypePtr()); 689 690 case Type::TypeOf: 691 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 692 693 case Type::Decltype: 694 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 695 .getTypePtr()); 696 697 case Type::QualifiedName: 698 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 699 700 case Type::TemplateSpecialization: 701 assert(getCanonicalType(T) != T && 702 "Cannot request the size of a dependent type"); 703 // FIXME: this is likely to be wrong once we support template 704 // aliases, since a template alias could refer to a typedef that 705 // has an __aligned__ attribute on it. 706 return getTypeInfo(getCanonicalType(T)); 707 } 708 709 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 710 return std::make_pair(Width, Align); 711} 712 713/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 714/// type for the current target in bits. This can be different than the ABI 715/// alignment in cases where it is beneficial for performance to overalign 716/// a data type. 717unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 718 unsigned ABIAlign = getTypeAlign(T); 719 720 // Double and long long should be naturally aligned if possible. 721 if (const ComplexType* CT = T->getAsComplexType()) 722 T = CT->getElementType().getTypePtr(); 723 if (T->isSpecificBuiltinType(BuiltinType::Double) || 724 T->isSpecificBuiltinType(BuiltinType::LongLong)) 725 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 726 727 return ABIAlign; 728} 729 730 731/// LayoutField - Field layout. 732void ASTRecordLayout::LayoutField(const FieldDecl *FD, unsigned FieldNo, 733 bool IsUnion, unsigned StructPacking, 734 ASTContext &Context) { 735 unsigned FieldPacking = StructPacking; 736 uint64_t FieldOffset = IsUnion ? 0 : Size; 737 uint64_t FieldSize; 738 unsigned FieldAlign; 739 740 // FIXME: Should this override struct packing? Probably we want to 741 // take the minimum? 742 if (const PackedAttr *PA = FD->getAttr<PackedAttr>()) 743 FieldPacking = PA->getAlignment(); 744 745 if (const Expr *BitWidthExpr = FD->getBitWidth()) { 746 // TODO: Need to check this algorithm on other targets! 747 // (tested on Linux-X86) 748 FieldSize = BitWidthExpr->EvaluateAsInt(Context).getZExtValue(); 749 750 std::pair<uint64_t, unsigned> FieldInfo = 751 Context.getTypeInfo(FD->getType()); 752 uint64_t TypeSize = FieldInfo.first; 753 754 // Determine the alignment of this bitfield. The packing 755 // attributes define a maximum and the alignment attribute defines 756 // a minimum. 757 // FIXME: What is the right behavior when the specified alignment 758 // is smaller than the specified packing? 759 FieldAlign = FieldInfo.second; 760 if (FieldPacking) 761 FieldAlign = std::min(FieldAlign, FieldPacking); 762 if (const AlignedAttr *AA = FD->getAttr<AlignedAttr>()) 763 FieldAlign = std::max(FieldAlign, AA->getAlignment()); 764 765 // Check if we need to add padding to give the field the correct 766 // alignment. 767 if (FieldSize == 0 || (FieldOffset & (FieldAlign-1)) + FieldSize > TypeSize) 768 FieldOffset = (FieldOffset + (FieldAlign-1)) & ~(FieldAlign-1); 769 770 // Padding members don't affect overall alignment 771 if (!FD->getIdentifier()) 772 FieldAlign = 1; 773 } else { 774 if (FD->getType()->isIncompleteArrayType()) { 775 // This is a flexible array member; we can't directly 776 // query getTypeInfo about these, so we figure it out here. 777 // Flexible array members don't have any size, but they 778 // have to be aligned appropriately for their element type. 779 FieldSize = 0; 780 const ArrayType* ATy = Context.getAsArrayType(FD->getType()); 781 FieldAlign = Context.getTypeAlign(ATy->getElementType()); 782 } else if (const ReferenceType *RT = FD->getType()->getAsReferenceType()) { 783 unsigned AS = RT->getPointeeType().getAddressSpace(); 784 FieldSize = Context.Target.getPointerWidth(AS); 785 FieldAlign = Context.Target.getPointerAlign(AS); 786 } else { 787 std::pair<uint64_t, unsigned> FieldInfo = 788 Context.getTypeInfo(FD->getType()); 789 FieldSize = FieldInfo.first; 790 FieldAlign = FieldInfo.second; 791 } 792 793 // Determine the alignment of this bitfield. The packing 794 // attributes define a maximum and the alignment attribute defines 795 // a minimum. Additionally, the packing alignment must be at least 796 // a byte for non-bitfields. 797 // 798 // FIXME: What is the right behavior when the specified alignment 799 // is smaller than the specified packing? 800 if (FieldPacking) 801 FieldAlign = std::min(FieldAlign, std::max(8U, FieldPacking)); 802 if (const AlignedAttr *AA = FD->getAttr<AlignedAttr>()) 803 FieldAlign = std::max(FieldAlign, AA->getAlignment()); 804 805 // Round up the current record size to the field's alignment boundary. 806 FieldOffset = (FieldOffset + (FieldAlign-1)) & ~(FieldAlign-1); 807 } 808 809 // Place this field at the current location. 810 FieldOffsets[FieldNo] = FieldOffset; 811 812 // Reserve space for this field. 813 if (IsUnion) { 814 Size = std::max(Size, FieldSize); 815 } else { 816 Size = FieldOffset + FieldSize; 817 } 818 819 // Remember the next available offset. 820 NextOffset = Size; 821 822 // Remember max struct/class alignment. 823 Alignment = std::max(Alignment, FieldAlign); 824} 825 826static void CollectLocalObjCIvars(ASTContext *Ctx, 827 const ObjCInterfaceDecl *OI, 828 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 829 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 830 E = OI->ivar_end(); I != E; ++I) { 831 ObjCIvarDecl *IVDecl = *I; 832 if (!IVDecl->isInvalidDecl()) 833 Fields.push_back(cast<FieldDecl>(IVDecl)); 834 } 835} 836 837void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 838 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 839 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 840 CollectObjCIvars(SuperClass, Fields); 841 CollectLocalObjCIvars(this, OI, Fields); 842} 843 844/// ShallowCollectObjCIvars - 845/// Collect all ivars, including those synthesized, in the current class. 846/// 847void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 848 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars, 849 bool CollectSynthesized) { 850 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 851 E = OI->ivar_end(); I != E; ++I) { 852 Ivars.push_back(*I); 853 } 854 if (CollectSynthesized) 855 CollectSynthesizedIvars(OI, Ivars); 856} 857 858void ASTContext::CollectProtocolSynthesizedIvars(const ObjCProtocolDecl *PD, 859 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 860 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 861 E = PD->prop_end(); I != E; ++I) 862 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 863 Ivars.push_back(Ivar); 864 865 // Also look into nested protocols. 866 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 867 E = PD->protocol_end(); P != E; ++P) 868 CollectProtocolSynthesizedIvars(*P, Ivars); 869} 870 871/// CollectSynthesizedIvars - 872/// This routine collect synthesized ivars for the designated class. 873/// 874void ASTContext::CollectSynthesizedIvars(const ObjCInterfaceDecl *OI, 875 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 876 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 877 E = OI->prop_end(); I != E; ++I) { 878 if (ObjCIvarDecl *Ivar = (*I)->getPropertyIvarDecl()) 879 Ivars.push_back(Ivar); 880 } 881 // Also look into interface's protocol list for properties declared 882 // in the protocol and whose ivars are synthesized. 883 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 884 PE = OI->protocol_end(); P != PE; ++P) { 885 ObjCProtocolDecl *PD = (*P); 886 CollectProtocolSynthesizedIvars(PD, Ivars); 887 } 888} 889 890unsigned ASTContext::CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD) { 891 unsigned count = 0; 892 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 893 E = PD->prop_end(); I != E; ++I) 894 if ((*I)->getPropertyIvarDecl()) 895 ++count; 896 897 // Also look into nested protocols. 898 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 899 E = PD->protocol_end(); P != E; ++P) 900 count += CountProtocolSynthesizedIvars(*P); 901 return count; 902} 903 904unsigned ASTContext::CountSynthesizedIvars(const ObjCInterfaceDecl *OI) 905{ 906 unsigned count = 0; 907 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 908 E = OI->prop_end(); I != E; ++I) { 909 if ((*I)->getPropertyIvarDecl()) 910 ++count; 911 } 912 // Also look into interface's protocol list for properties declared 913 // in the protocol and whose ivars are synthesized. 914 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 915 PE = OI->protocol_end(); P != PE; ++P) { 916 ObjCProtocolDecl *PD = (*P); 917 count += CountProtocolSynthesizedIvars(PD); 918 } 919 return count; 920} 921 922/// getInterfaceLayoutImpl - Get or compute information about the 923/// layout of the given interface. 924/// 925/// \param Impl - If given, also include the layout of the interface's 926/// implementation. This may differ by including synthesized ivars. 927const ASTRecordLayout & 928ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 929 const ObjCImplementationDecl *Impl) { 930 assert(!D->isForwardDecl() && "Invalid interface decl!"); 931 932 // Look up this layout, if already laid out, return what we have. 933 ObjCContainerDecl *Key = 934 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 935 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 936 return *Entry; 937 938 unsigned FieldCount = D->ivar_size(); 939 // Add in synthesized ivar count if laying out an implementation. 940 if (Impl) { 941 unsigned SynthCount = CountSynthesizedIvars(D); 942 FieldCount += SynthCount; 943 // If there aren't any sythesized ivars then reuse the interface 944 // entry. Note we can't cache this because we simply free all 945 // entries later; however we shouldn't look up implementations 946 // frequently. 947 if (SynthCount == 0) 948 return getObjCLayout(D, 0); 949 } 950 951 ASTRecordLayout *NewEntry = NULL; 952 if (ObjCInterfaceDecl *SD = D->getSuperClass()) { 953 const ASTRecordLayout &SL = getASTObjCInterfaceLayout(SD); 954 unsigned Alignment = SL.getAlignment(); 955 956 // We start laying out ivars not at the end of the superclass 957 // structure, but at the next byte following the last field. 958 uint64_t Size = llvm::RoundUpToAlignment(SL.NextOffset, 8); 959 960 ObjCLayouts[Key] = NewEntry = new ASTRecordLayout(Size, Alignment); 961 NewEntry->InitializeLayout(FieldCount); 962 } else { 963 ObjCLayouts[Key] = NewEntry = new ASTRecordLayout(); 964 NewEntry->InitializeLayout(FieldCount); 965 } 966 967 unsigned StructPacking = 0; 968 if (const PackedAttr *PA = D->getAttr<PackedAttr>()) 969 StructPacking = PA->getAlignment(); 970 971 if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) 972 NewEntry->SetAlignment(std::max(NewEntry->getAlignment(), 973 AA->getAlignment())); 974 975 // Layout each ivar sequentially. 976 unsigned i = 0; 977 llvm::SmallVector<ObjCIvarDecl*, 16> Ivars; 978 ShallowCollectObjCIvars(D, Ivars, Impl); 979 for (unsigned k = 0, e = Ivars.size(); k != e; ++k) 980 NewEntry->LayoutField(Ivars[k], i++, false, StructPacking, *this); 981 982 // Finally, round the size of the total struct up to the alignment of the 983 // struct itself. 984 NewEntry->FinalizeLayout(); 985 return *NewEntry; 986} 987 988const ASTRecordLayout & 989ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 990 return getObjCLayout(D, 0); 991} 992 993const ASTRecordLayout & 994ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 995 return getObjCLayout(D->getClassInterface(), D); 996} 997 998/// getASTRecordLayout - Get or compute information about the layout of the 999/// specified record (struct/union/class), which indicates its size and field 1000/// position information. 1001const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 1002 D = D->getDefinition(*this); 1003 assert(D && "Cannot get layout of forward declarations!"); 1004 1005 // Look up this layout, if already laid out, return what we have. 1006 const ASTRecordLayout *&Entry = ASTRecordLayouts[D]; 1007 if (Entry) return *Entry; 1008 1009 // Allocate and assign into ASTRecordLayouts here. The "Entry" reference can 1010 // be invalidated (dangle) if the ASTRecordLayouts hashtable is inserted into. 1011 ASTRecordLayout *NewEntry = new ASTRecordLayout(); 1012 Entry = NewEntry; 1013 1014 // FIXME: Avoid linear walk through the fields, if possible. 1015 NewEntry->InitializeLayout(std::distance(D->field_begin(), D->field_end())); 1016 bool IsUnion = D->isUnion(); 1017 1018 unsigned StructPacking = 0; 1019 if (const PackedAttr *PA = D->getAttr<PackedAttr>()) 1020 StructPacking = PA->getAlignment(); 1021 1022 if (const AlignedAttr *AA = D->getAttr<AlignedAttr>()) 1023 NewEntry->SetAlignment(std::max(NewEntry->getAlignment(), 1024 AA->getAlignment())); 1025 1026 // Layout each field, for now, just sequentially, respecting alignment. In 1027 // the future, this will need to be tweakable by targets. 1028 unsigned FieldIdx = 0; 1029 for (RecordDecl::field_iterator Field = D->field_begin(), 1030 FieldEnd = D->field_end(); 1031 Field != FieldEnd; (void)++Field, ++FieldIdx) 1032 NewEntry->LayoutField(*Field, FieldIdx, IsUnion, StructPacking, *this); 1033 1034 // Finally, round the size of the total struct up to the alignment of the 1035 // struct itself. 1036 NewEntry->FinalizeLayout(getLangOptions().CPlusPlus); 1037 return *NewEntry; 1038} 1039 1040//===----------------------------------------------------------------------===// 1041// Type creation/memoization methods 1042//===----------------------------------------------------------------------===// 1043 1044QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1045 QualType CanT = getCanonicalType(T); 1046 if (CanT.getAddressSpace() == AddressSpace) 1047 return T; 1048 1049 // If we are composing extended qualifiers together, merge together into one 1050 // ExtQualType node. 1051 unsigned CVRQuals = T.getCVRQualifiers(); 1052 QualType::GCAttrTypes GCAttr = QualType::GCNone; 1053 Type *TypeNode = T.getTypePtr(); 1054 1055 if (ExtQualType *EQT = dyn_cast<ExtQualType>(TypeNode)) { 1056 // If this type already has an address space specified, it cannot get 1057 // another one. 1058 assert(EQT->getAddressSpace() == 0 && 1059 "Type cannot be in multiple addr spaces!"); 1060 GCAttr = EQT->getObjCGCAttr(); 1061 TypeNode = EQT->getBaseType(); 1062 } 1063 1064 // Check if we've already instantiated this type. 1065 llvm::FoldingSetNodeID ID; 1066 ExtQualType::Profile(ID, TypeNode, AddressSpace, GCAttr); 1067 void *InsertPos = 0; 1068 if (ExtQualType *EXTQy = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos)) 1069 return QualType(EXTQy, CVRQuals); 1070 1071 // If the base type isn't canonical, this won't be a canonical type either, 1072 // so fill in the canonical type field. 1073 QualType Canonical; 1074 if (!TypeNode->isCanonical()) { 1075 Canonical = getAddrSpaceQualType(CanT, AddressSpace); 1076 1077 // Update InsertPos, the previous call could have invalidated it. 1078 ExtQualType *NewIP = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos); 1079 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1080 } 1081 ExtQualType *New = 1082 new (*this, 8) ExtQualType(TypeNode, Canonical, AddressSpace, GCAttr); 1083 ExtQualTypes.InsertNode(New, InsertPos); 1084 Types.push_back(New); 1085 return QualType(New, CVRQuals); 1086} 1087 1088QualType ASTContext::getObjCGCQualType(QualType T, 1089 QualType::GCAttrTypes GCAttr) { 1090 QualType CanT = getCanonicalType(T); 1091 if (CanT.getObjCGCAttr() == GCAttr) 1092 return T; 1093 1094 if (T->isPointerType()) { 1095 QualType Pointee = T->getAsPointerType()->getPointeeType(); 1096 if (Pointee->isAnyPointerType()) { 1097 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1098 return getPointerType(ResultType); 1099 } 1100 } 1101 // If we are composing extended qualifiers together, merge together into one 1102 // ExtQualType node. 1103 unsigned CVRQuals = T.getCVRQualifiers(); 1104 Type *TypeNode = T.getTypePtr(); 1105 unsigned AddressSpace = 0; 1106 1107 if (ExtQualType *EQT = dyn_cast<ExtQualType>(TypeNode)) { 1108 // If this type already has an address space specified, it cannot get 1109 // another one. 1110 assert(EQT->getObjCGCAttr() == QualType::GCNone && 1111 "Type cannot be in multiple addr spaces!"); 1112 AddressSpace = EQT->getAddressSpace(); 1113 TypeNode = EQT->getBaseType(); 1114 } 1115 1116 // Check if we've already instantiated an gc qual'd type of this type. 1117 llvm::FoldingSetNodeID ID; 1118 ExtQualType::Profile(ID, TypeNode, AddressSpace, GCAttr); 1119 void *InsertPos = 0; 1120 if (ExtQualType *EXTQy = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos)) 1121 return QualType(EXTQy, CVRQuals); 1122 1123 // If the base type isn't canonical, this won't be a canonical type either, 1124 // so fill in the canonical type field. 1125 // FIXME: Isn't this also not canonical if the base type is a array 1126 // or pointer type? I can't find any documentation for objc_gc, though... 1127 QualType Canonical; 1128 if (!T->isCanonical()) { 1129 Canonical = getObjCGCQualType(CanT, GCAttr); 1130 1131 // Update InsertPos, the previous call could have invalidated it. 1132 ExtQualType *NewIP = ExtQualTypes.FindNodeOrInsertPos(ID, InsertPos); 1133 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1134 } 1135 ExtQualType *New = 1136 new (*this, 8) ExtQualType(TypeNode, Canonical, AddressSpace, GCAttr); 1137 ExtQualTypes.InsertNode(New, InsertPos); 1138 Types.push_back(New); 1139 return QualType(New, CVRQuals); 1140} 1141 1142/// getComplexType - Return the uniqued reference to the type for a complex 1143/// number with the specified element type. 1144QualType ASTContext::getComplexType(QualType T) { 1145 // Unique pointers, to guarantee there is only one pointer of a particular 1146 // structure. 1147 llvm::FoldingSetNodeID ID; 1148 ComplexType::Profile(ID, T); 1149 1150 void *InsertPos = 0; 1151 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1152 return QualType(CT, 0); 1153 1154 // If the pointee type isn't canonical, this won't be a canonical type either, 1155 // so fill in the canonical type field. 1156 QualType Canonical; 1157 if (!T->isCanonical()) { 1158 Canonical = getComplexType(getCanonicalType(T)); 1159 1160 // Get the new insert position for the node we care about. 1161 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1162 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1163 } 1164 ComplexType *New = new (*this,8) ComplexType(T, Canonical); 1165 Types.push_back(New); 1166 ComplexTypes.InsertNode(New, InsertPos); 1167 return QualType(New, 0); 1168} 1169 1170QualType ASTContext::getFixedWidthIntType(unsigned Width, bool Signed) { 1171 llvm::DenseMap<unsigned, FixedWidthIntType*> &Map = Signed ? 1172 SignedFixedWidthIntTypes : UnsignedFixedWidthIntTypes; 1173 FixedWidthIntType *&Entry = Map[Width]; 1174 if (!Entry) 1175 Entry = new FixedWidthIntType(Width, Signed); 1176 return QualType(Entry, 0); 1177} 1178 1179/// getPointerType - Return the uniqued reference to the type for a pointer to 1180/// the specified type. 1181QualType ASTContext::getPointerType(QualType T) { 1182 // Unique pointers, to guarantee there is only one pointer of a particular 1183 // structure. 1184 llvm::FoldingSetNodeID ID; 1185 PointerType::Profile(ID, T); 1186 1187 void *InsertPos = 0; 1188 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1189 return QualType(PT, 0); 1190 1191 // If the pointee type isn't canonical, this won't be a canonical type either, 1192 // so fill in the canonical type field. 1193 QualType Canonical; 1194 if (!T->isCanonical()) { 1195 Canonical = getPointerType(getCanonicalType(T)); 1196 1197 // Get the new insert position for the node we care about. 1198 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1199 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1200 } 1201 PointerType *New = new (*this,8) PointerType(T, Canonical); 1202 Types.push_back(New); 1203 PointerTypes.InsertNode(New, InsertPos); 1204 return QualType(New, 0); 1205} 1206 1207/// getBlockPointerType - Return the uniqued reference to the type for 1208/// a pointer to the specified block. 1209QualType ASTContext::getBlockPointerType(QualType T) { 1210 assert(T->isFunctionType() && "block of function types only"); 1211 // Unique pointers, to guarantee there is only one block of a particular 1212 // structure. 1213 llvm::FoldingSetNodeID ID; 1214 BlockPointerType::Profile(ID, T); 1215 1216 void *InsertPos = 0; 1217 if (BlockPointerType *PT = 1218 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1219 return QualType(PT, 0); 1220 1221 // If the block pointee type isn't canonical, this won't be a canonical 1222 // type either so fill in the canonical type field. 1223 QualType Canonical; 1224 if (!T->isCanonical()) { 1225 Canonical = getBlockPointerType(getCanonicalType(T)); 1226 1227 // Get the new insert position for the node we care about. 1228 BlockPointerType *NewIP = 1229 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1230 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1231 } 1232 BlockPointerType *New = new (*this,8) BlockPointerType(T, Canonical); 1233 Types.push_back(New); 1234 BlockPointerTypes.InsertNode(New, InsertPos); 1235 return QualType(New, 0); 1236} 1237 1238/// getLValueReferenceType - Return the uniqued reference to the type for an 1239/// lvalue reference to the specified type. 1240QualType ASTContext::getLValueReferenceType(QualType T) { 1241 // Unique pointers, to guarantee there is only one pointer of a particular 1242 // structure. 1243 llvm::FoldingSetNodeID ID; 1244 ReferenceType::Profile(ID, T); 1245 1246 void *InsertPos = 0; 1247 if (LValueReferenceType *RT = 1248 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1249 return QualType(RT, 0); 1250 1251 // If the referencee type isn't canonical, this won't be a canonical type 1252 // either, so fill in the canonical type field. 1253 QualType Canonical; 1254 if (!T->isCanonical()) { 1255 Canonical = getLValueReferenceType(getCanonicalType(T)); 1256 1257 // Get the new insert position for the node we care about. 1258 LValueReferenceType *NewIP = 1259 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1260 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1261 } 1262 1263 LValueReferenceType *New = new (*this,8) LValueReferenceType(T, Canonical); 1264 Types.push_back(New); 1265 LValueReferenceTypes.InsertNode(New, InsertPos); 1266 return QualType(New, 0); 1267} 1268 1269/// getRValueReferenceType - Return the uniqued reference to the type for an 1270/// rvalue reference to the specified type. 1271QualType ASTContext::getRValueReferenceType(QualType T) { 1272 // Unique pointers, to guarantee there is only one pointer of a particular 1273 // structure. 1274 llvm::FoldingSetNodeID ID; 1275 ReferenceType::Profile(ID, T); 1276 1277 void *InsertPos = 0; 1278 if (RValueReferenceType *RT = 1279 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1280 return QualType(RT, 0); 1281 1282 // If the referencee type isn't canonical, this won't be a canonical type 1283 // either, so fill in the canonical type field. 1284 QualType Canonical; 1285 if (!T->isCanonical()) { 1286 Canonical = getRValueReferenceType(getCanonicalType(T)); 1287 1288 // Get the new insert position for the node we care about. 1289 RValueReferenceType *NewIP = 1290 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1291 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1292 } 1293 1294 RValueReferenceType *New = new (*this,8) RValueReferenceType(T, Canonical); 1295 Types.push_back(New); 1296 RValueReferenceTypes.InsertNode(New, InsertPos); 1297 return QualType(New, 0); 1298} 1299 1300/// getMemberPointerType - Return the uniqued reference to the type for a 1301/// member pointer to the specified type, in the specified class. 1302QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) 1303{ 1304 // Unique pointers, to guarantee there is only one pointer of a particular 1305 // structure. 1306 llvm::FoldingSetNodeID ID; 1307 MemberPointerType::Profile(ID, T, Cls); 1308 1309 void *InsertPos = 0; 1310 if (MemberPointerType *PT = 1311 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1312 return QualType(PT, 0); 1313 1314 // If the pointee or class type isn't canonical, this won't be a canonical 1315 // type either, so fill in the canonical type field. 1316 QualType Canonical; 1317 if (!T->isCanonical()) { 1318 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1319 1320 // Get the new insert position for the node we care about. 1321 MemberPointerType *NewIP = 1322 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1323 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1324 } 1325 MemberPointerType *New = new (*this,8) MemberPointerType(T, Cls, Canonical); 1326 Types.push_back(New); 1327 MemberPointerTypes.InsertNode(New, InsertPos); 1328 return QualType(New, 0); 1329} 1330 1331/// getConstantArrayType - Return the unique reference to the type for an 1332/// array of the specified element type. 1333QualType ASTContext::getConstantArrayType(QualType EltTy, 1334 const llvm::APInt &ArySizeIn, 1335 ArrayType::ArraySizeModifier ASM, 1336 unsigned EltTypeQuals) { 1337 assert((EltTy->isDependentType() || EltTy->isConstantSizeType()) && 1338 "Constant array of VLAs is illegal!"); 1339 1340 // Convert the array size into a canonical width matching the pointer size for 1341 // the target. 1342 llvm::APInt ArySize(ArySizeIn); 1343 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1344 1345 llvm::FoldingSetNodeID ID; 1346 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1347 1348 void *InsertPos = 0; 1349 if (ConstantArrayType *ATP = 1350 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1351 return QualType(ATP, 0); 1352 1353 // If the element type isn't canonical, this won't be a canonical type either, 1354 // so fill in the canonical type field. 1355 QualType Canonical; 1356 if (!EltTy->isCanonical()) { 1357 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1358 ASM, EltTypeQuals); 1359 // Get the new insert position for the node we care about. 1360 ConstantArrayType *NewIP = 1361 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1362 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1363 } 1364 1365 ConstantArrayType *New = 1366 new(*this,8)ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1367 ConstantArrayTypes.InsertNode(New, InsertPos); 1368 Types.push_back(New); 1369 return QualType(New, 0); 1370} 1371 1372/// getConstantArrayWithExprType - Return a reference to the type for 1373/// an array of the specified element type. 1374QualType 1375ASTContext::getConstantArrayWithExprType(QualType EltTy, 1376 const llvm::APInt &ArySizeIn, 1377 Expr *ArySizeExpr, 1378 ArrayType::ArraySizeModifier ASM, 1379 unsigned EltTypeQuals, 1380 SourceRange Brackets) { 1381 // Convert the array size into a canonical width matching the pointer 1382 // size for the target. 1383 llvm::APInt ArySize(ArySizeIn); 1384 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1385 1386 // Compute the canonical ConstantArrayType. 1387 QualType Canonical = getConstantArrayType(getCanonicalType(EltTy), 1388 ArySize, ASM, EltTypeQuals); 1389 // Since we don't unique expressions, it isn't possible to unique VLA's 1390 // that have an expression provided for their size. 1391 ConstantArrayWithExprType *New = 1392 new(*this,8)ConstantArrayWithExprType(EltTy, Canonical, 1393 ArySize, ArySizeExpr, 1394 ASM, EltTypeQuals, Brackets); 1395 Types.push_back(New); 1396 return QualType(New, 0); 1397} 1398 1399/// getConstantArrayWithoutExprType - Return a reference to the type for 1400/// an array of the specified element type. 1401QualType 1402ASTContext::getConstantArrayWithoutExprType(QualType EltTy, 1403 const llvm::APInt &ArySizeIn, 1404 ArrayType::ArraySizeModifier ASM, 1405 unsigned EltTypeQuals) { 1406 // Convert the array size into a canonical width matching the pointer 1407 // size for the target. 1408 llvm::APInt ArySize(ArySizeIn); 1409 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1410 1411 // Compute the canonical ConstantArrayType. 1412 QualType Canonical = getConstantArrayType(getCanonicalType(EltTy), 1413 ArySize, ASM, EltTypeQuals); 1414 ConstantArrayWithoutExprType *New = 1415 new(*this,8)ConstantArrayWithoutExprType(EltTy, Canonical, 1416 ArySize, ASM, EltTypeQuals); 1417 Types.push_back(New); 1418 return QualType(New, 0); 1419} 1420 1421/// getVariableArrayType - Returns a non-unique reference to the type for a 1422/// variable array of the specified element type. 1423QualType ASTContext::getVariableArrayType(QualType EltTy, 1424 Expr *NumElts, 1425 ArrayType::ArraySizeModifier ASM, 1426 unsigned EltTypeQuals, 1427 SourceRange Brackets) { 1428 // Since we don't unique expressions, it isn't possible to unique VLA's 1429 // that have an expression provided for their size. 1430 1431 VariableArrayType *New = 1432 new(*this,8)VariableArrayType(EltTy, QualType(), 1433 NumElts, ASM, EltTypeQuals, Brackets); 1434 1435 VariableArrayTypes.push_back(New); 1436 Types.push_back(New); 1437 return QualType(New, 0); 1438} 1439 1440/// getDependentSizedArrayType - Returns a non-unique reference to 1441/// the type for a dependently-sized array of the specified element 1442/// type. FIXME: We will need these to be uniqued, or at least 1443/// comparable, at some point. 1444QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1445 Expr *NumElts, 1446 ArrayType::ArraySizeModifier ASM, 1447 unsigned EltTypeQuals, 1448 SourceRange Brackets) { 1449 assert((NumElts->isTypeDependent() || NumElts->isValueDependent()) && 1450 "Size must be type- or value-dependent!"); 1451 1452 // Since we don't unique expressions, it isn't possible to unique 1453 // dependently-sized array types. 1454 1455 DependentSizedArrayType *New = 1456 new (*this,8) DependentSizedArrayType(EltTy, QualType(), 1457 NumElts, ASM, EltTypeQuals, 1458 Brackets); 1459 1460 DependentSizedArrayTypes.push_back(New); 1461 Types.push_back(New); 1462 return QualType(New, 0); 1463} 1464 1465QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1466 ArrayType::ArraySizeModifier ASM, 1467 unsigned EltTypeQuals) { 1468 llvm::FoldingSetNodeID ID; 1469 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1470 1471 void *InsertPos = 0; 1472 if (IncompleteArrayType *ATP = 1473 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1474 return QualType(ATP, 0); 1475 1476 // If the element type isn't canonical, this won't be a canonical type 1477 // either, so fill in the canonical type field. 1478 QualType Canonical; 1479 1480 if (!EltTy->isCanonical()) { 1481 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1482 ASM, EltTypeQuals); 1483 1484 // Get the new insert position for the node we care about. 1485 IncompleteArrayType *NewIP = 1486 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1487 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1488 } 1489 1490 IncompleteArrayType *New 1491 = new (*this,8) IncompleteArrayType(EltTy, Canonical, 1492 ASM, EltTypeQuals); 1493 1494 IncompleteArrayTypes.InsertNode(New, InsertPos); 1495 Types.push_back(New); 1496 return QualType(New, 0); 1497} 1498 1499/// getVectorType - Return the unique reference to a vector type of 1500/// the specified element type and size. VectorType must be a built-in type. 1501QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts) { 1502 BuiltinType *baseType; 1503 1504 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1505 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1506 1507 // Check if we've already instantiated a vector of this type. 1508 llvm::FoldingSetNodeID ID; 1509 VectorType::Profile(ID, vecType, NumElts, Type::Vector); 1510 void *InsertPos = 0; 1511 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1512 return QualType(VTP, 0); 1513 1514 // If the element type isn't canonical, this won't be a canonical type either, 1515 // so fill in the canonical type field. 1516 QualType Canonical; 1517 if (!vecType->isCanonical()) { 1518 Canonical = getVectorType(getCanonicalType(vecType), NumElts); 1519 1520 // Get the new insert position for the node we care about. 1521 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1522 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1523 } 1524 VectorType *New = new (*this,8) VectorType(vecType, NumElts, Canonical); 1525 VectorTypes.InsertNode(New, InsertPos); 1526 Types.push_back(New); 1527 return QualType(New, 0); 1528} 1529 1530/// getExtVectorType - Return the unique reference to an extended vector type of 1531/// the specified element type and size. VectorType must be a built-in type. 1532QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1533 BuiltinType *baseType; 1534 1535 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1536 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1537 1538 // Check if we've already instantiated a vector of this type. 1539 llvm::FoldingSetNodeID ID; 1540 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector); 1541 void *InsertPos = 0; 1542 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1543 return QualType(VTP, 0); 1544 1545 // If the element type isn't canonical, this won't be a canonical type either, 1546 // so fill in the canonical type field. 1547 QualType Canonical; 1548 if (!vecType->isCanonical()) { 1549 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1550 1551 // Get the new insert position for the node we care about. 1552 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1553 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1554 } 1555 ExtVectorType *New = new (*this,8) ExtVectorType(vecType, NumElts, Canonical); 1556 VectorTypes.InsertNode(New, InsertPos); 1557 Types.push_back(New); 1558 return QualType(New, 0); 1559} 1560 1561QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1562 Expr *SizeExpr, 1563 SourceLocation AttrLoc) { 1564 DependentSizedExtVectorType *New = 1565 new (*this,8) DependentSizedExtVectorType(vecType, QualType(), 1566 SizeExpr, AttrLoc); 1567 1568 DependentSizedExtVectorTypes.push_back(New); 1569 Types.push_back(New); 1570 return QualType(New, 0); 1571} 1572 1573/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1574/// 1575QualType ASTContext::getFunctionNoProtoType(QualType ResultTy) { 1576 // Unique functions, to guarantee there is only one function of a particular 1577 // structure. 1578 llvm::FoldingSetNodeID ID; 1579 FunctionNoProtoType::Profile(ID, ResultTy); 1580 1581 void *InsertPos = 0; 1582 if (FunctionNoProtoType *FT = 1583 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1584 return QualType(FT, 0); 1585 1586 QualType Canonical; 1587 if (!ResultTy->isCanonical()) { 1588 Canonical = getFunctionNoProtoType(getCanonicalType(ResultTy)); 1589 1590 // Get the new insert position for the node we care about. 1591 FunctionNoProtoType *NewIP = 1592 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1593 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1594 } 1595 1596 FunctionNoProtoType *New =new(*this,8)FunctionNoProtoType(ResultTy,Canonical); 1597 Types.push_back(New); 1598 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1599 return QualType(New, 0); 1600} 1601 1602/// getFunctionType - Return a normal function type with a typed argument 1603/// list. isVariadic indicates whether the argument list includes '...'. 1604QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1605 unsigned NumArgs, bool isVariadic, 1606 unsigned TypeQuals, bool hasExceptionSpec, 1607 bool hasAnyExceptionSpec, unsigned NumExs, 1608 const QualType *ExArray) { 1609 // Unique functions, to guarantee there is only one function of a particular 1610 // structure. 1611 llvm::FoldingSetNodeID ID; 1612 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1613 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1614 NumExs, ExArray); 1615 1616 void *InsertPos = 0; 1617 if (FunctionProtoType *FTP = 1618 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1619 return QualType(FTP, 0); 1620 1621 // Determine whether the type being created is already canonical or not. 1622 bool isCanonical = ResultTy->isCanonical(); 1623 if (hasExceptionSpec) 1624 isCanonical = false; 1625 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1626 if (!ArgArray[i]->isCanonical()) 1627 isCanonical = false; 1628 1629 // If this type isn't canonical, get the canonical version of it. 1630 // The exception spec is not part of the canonical type. 1631 QualType Canonical; 1632 if (!isCanonical) { 1633 llvm::SmallVector<QualType, 16> CanonicalArgs; 1634 CanonicalArgs.reserve(NumArgs); 1635 for (unsigned i = 0; i != NumArgs; ++i) 1636 CanonicalArgs.push_back(getCanonicalType(ArgArray[i])); 1637 1638 Canonical = getFunctionType(getCanonicalType(ResultTy), 1639 CanonicalArgs.data(), NumArgs, 1640 isVariadic, TypeQuals); 1641 1642 // Get the new insert position for the node we care about. 1643 FunctionProtoType *NewIP = 1644 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1645 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1646 } 1647 1648 // FunctionProtoType objects are allocated with extra bytes after them 1649 // for two variable size arrays (for parameter and exception types) at the 1650 // end of them. 1651 FunctionProtoType *FTP = 1652 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1653 NumArgs*sizeof(QualType) + 1654 NumExs*sizeof(QualType), 8); 1655 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1656 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1657 ExArray, NumExs, Canonical); 1658 Types.push_back(FTP); 1659 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1660 return QualType(FTP, 0); 1661} 1662 1663/// getTypeDeclType - Return the unique reference to the type for the 1664/// specified type declaration. 1665QualType ASTContext::getTypeDeclType(TypeDecl *Decl, TypeDecl* PrevDecl) { 1666 assert(Decl && "Passed null for Decl param"); 1667 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1668 1669 if (TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1670 return getTypedefType(Typedef); 1671 else if (isa<TemplateTypeParmDecl>(Decl)) { 1672 assert(false && "Template type parameter types are always available."); 1673 } else if (ObjCInterfaceDecl *ObjCInterface = dyn_cast<ObjCInterfaceDecl>(Decl)) 1674 return getObjCInterfaceType(ObjCInterface); 1675 1676 if (RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1677 if (PrevDecl) 1678 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1679 else 1680 Decl->TypeForDecl = new (*this,8) RecordType(Record); 1681 } 1682 else if (EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1683 if (PrevDecl) 1684 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1685 else 1686 Decl->TypeForDecl = new (*this,8) EnumType(Enum); 1687 } 1688 else 1689 assert(false && "TypeDecl without a type?"); 1690 1691 if (!PrevDecl) Types.push_back(Decl->TypeForDecl); 1692 return QualType(Decl->TypeForDecl, 0); 1693} 1694 1695/// getTypedefType - Return the unique reference to the type for the 1696/// specified typename decl. 1697QualType ASTContext::getTypedefType(TypedefDecl *Decl) { 1698 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1699 1700 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1701 Decl->TypeForDecl = new(*this,8) TypedefType(Type::Typedef, Decl, Canonical); 1702 Types.push_back(Decl->TypeForDecl); 1703 return QualType(Decl->TypeForDecl, 0); 1704} 1705 1706/// getObjCInterfaceType - Return the unique reference to the type for the 1707/// specified ObjC interface decl. 1708QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 1709 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1710 1711 ObjCInterfaceDecl *OID = const_cast<ObjCInterfaceDecl*>(Decl); 1712 Decl->TypeForDecl = new(*this,8) ObjCInterfaceType(Type::ObjCInterface, OID); 1713 Types.push_back(Decl->TypeForDecl); 1714 return QualType(Decl->TypeForDecl, 0); 1715} 1716 1717/// \brief Retrieve the template type parameter type for a template 1718/// parameter or parameter pack with the given depth, index, and (optionally) 1719/// name. 1720QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1721 bool ParameterPack, 1722 IdentifierInfo *Name) { 1723 llvm::FoldingSetNodeID ID; 1724 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1725 void *InsertPos = 0; 1726 TemplateTypeParmType *TypeParm 1727 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1728 1729 if (TypeParm) 1730 return QualType(TypeParm, 0); 1731 1732 if (Name) { 1733 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1734 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index, ParameterPack, 1735 Name, Canon); 1736 } else 1737 TypeParm = new (*this, 8) TemplateTypeParmType(Depth, Index, ParameterPack); 1738 1739 Types.push_back(TypeParm); 1740 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1741 1742 return QualType(TypeParm, 0); 1743} 1744 1745QualType 1746ASTContext::getTemplateSpecializationType(TemplateName Template, 1747 const TemplateArgument *Args, 1748 unsigned NumArgs, 1749 QualType Canon) { 1750 if (!Canon.isNull()) 1751 Canon = getCanonicalType(Canon); 1752 1753 llvm::FoldingSetNodeID ID; 1754 TemplateSpecializationType::Profile(ID, Template, Args, NumArgs); 1755 1756 void *InsertPos = 0; 1757 TemplateSpecializationType *Spec 1758 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1759 1760 if (Spec) 1761 return QualType(Spec, 0); 1762 1763 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1764 sizeof(TemplateArgument) * NumArgs), 1765 8); 1766 Spec = new (Mem) TemplateSpecializationType(Template, Args, NumArgs, Canon); 1767 Types.push_back(Spec); 1768 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1769 1770 return QualType(Spec, 0); 1771} 1772 1773QualType 1774ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1775 QualType NamedType) { 1776 llvm::FoldingSetNodeID ID; 1777 QualifiedNameType::Profile(ID, NNS, NamedType); 1778 1779 void *InsertPos = 0; 1780 QualifiedNameType *T 1781 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1782 if (T) 1783 return QualType(T, 0); 1784 1785 T = new (*this) QualifiedNameType(NNS, NamedType, 1786 getCanonicalType(NamedType)); 1787 Types.push_back(T); 1788 QualifiedNameTypes.InsertNode(T, InsertPos); 1789 return QualType(T, 0); 1790} 1791 1792QualType ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1793 const IdentifierInfo *Name, 1794 QualType Canon) { 1795 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1796 1797 if (Canon.isNull()) { 1798 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1799 if (CanonNNS != NNS) 1800 Canon = getTypenameType(CanonNNS, Name); 1801 } 1802 1803 llvm::FoldingSetNodeID ID; 1804 TypenameType::Profile(ID, NNS, Name); 1805 1806 void *InsertPos = 0; 1807 TypenameType *T 1808 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1809 if (T) 1810 return QualType(T, 0); 1811 1812 T = new (*this) TypenameType(NNS, Name, Canon); 1813 Types.push_back(T); 1814 TypenameTypes.InsertNode(T, InsertPos); 1815 return QualType(T, 0); 1816} 1817 1818QualType 1819ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1820 const TemplateSpecializationType *TemplateId, 1821 QualType Canon) { 1822 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1823 1824 if (Canon.isNull()) { 1825 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1826 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1827 if (CanonNNS != NNS || CanonType != QualType(TemplateId, 0)) { 1828 const TemplateSpecializationType *CanonTemplateId 1829 = CanonType->getAsTemplateSpecializationType(); 1830 assert(CanonTemplateId && 1831 "Canonical type must also be a template specialization type"); 1832 Canon = getTypenameType(CanonNNS, CanonTemplateId); 1833 } 1834 } 1835 1836 llvm::FoldingSetNodeID ID; 1837 TypenameType::Profile(ID, NNS, TemplateId); 1838 1839 void *InsertPos = 0; 1840 TypenameType *T 1841 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1842 if (T) 1843 return QualType(T, 0); 1844 1845 T = new (*this) TypenameType(NNS, TemplateId, Canon); 1846 Types.push_back(T); 1847 TypenameTypes.InsertNode(T, InsertPos); 1848 return QualType(T, 0); 1849} 1850 1851/// CmpProtocolNames - Comparison predicate for sorting protocols 1852/// alphabetically. 1853static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 1854 const ObjCProtocolDecl *RHS) { 1855 return LHS->getDeclName() < RHS->getDeclName(); 1856} 1857 1858static void SortAndUniqueProtocols(ObjCProtocolDecl **&Protocols, 1859 unsigned &NumProtocols) { 1860 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 1861 1862 // Sort protocols, keyed by name. 1863 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 1864 1865 // Remove duplicates. 1866 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 1867 NumProtocols = ProtocolsEnd-Protocols; 1868} 1869 1870/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 1871/// the given interface decl and the conforming protocol list. 1872QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 1873 ObjCProtocolDecl **Protocols, 1874 unsigned NumProtocols) { 1875 if (InterfaceT.isNull()) 1876 InterfaceT = ObjCBuiltinIdTy; 1877 1878 // Sort the protocol list alphabetically to canonicalize it. 1879 if (NumProtocols) 1880 SortAndUniqueProtocols(Protocols, NumProtocols); 1881 1882 llvm::FoldingSetNodeID ID; 1883 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 1884 1885 void *InsertPos = 0; 1886 if (ObjCObjectPointerType *QT = 1887 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1888 return QualType(QT, 0); 1889 1890 // No Match; 1891 ObjCObjectPointerType *QType = 1892 new (*this,8) ObjCObjectPointerType(InterfaceT, Protocols, NumProtocols); 1893 1894 Types.push_back(QType); 1895 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 1896 return QualType(QType, 0); 1897} 1898 1899/// getObjCQualifiedInterfaceType - Return a ObjCQualifiedInterfaceType type for 1900/// the given interface decl and the conforming protocol list. 1901QualType ASTContext::getObjCQualifiedInterfaceType(ObjCInterfaceDecl *Decl, 1902 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 1903 // Sort the protocol list alphabetically to canonicalize it. 1904 SortAndUniqueProtocols(Protocols, NumProtocols); 1905 1906 llvm::FoldingSetNodeID ID; 1907 ObjCQualifiedInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 1908 1909 void *InsertPos = 0; 1910 if (ObjCQualifiedInterfaceType *QT = 1911 ObjCQualifiedInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1912 return QualType(QT, 0); 1913 1914 // No Match; 1915 ObjCQualifiedInterfaceType *QType = 1916 new (*this,8) ObjCQualifiedInterfaceType(Decl, Protocols, NumProtocols); 1917 1918 Types.push_back(QType); 1919 ObjCQualifiedInterfaceTypes.InsertNode(QType, InsertPos); 1920 return QualType(QType, 0); 1921} 1922 1923/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 1924/// TypeOfExprType AST's (since expression's are never shared). For example, 1925/// multiple declarations that refer to "typeof(x)" all contain different 1926/// DeclRefExpr's. This doesn't effect the type checker, since it operates 1927/// on canonical type's (which are always unique). 1928QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 1929 TypeOfExprType *toe; 1930 if (tofExpr->isTypeDependent()) 1931 toe = new (*this, 8) TypeOfExprType(tofExpr); 1932 else { 1933 QualType Canonical = getCanonicalType(tofExpr->getType()); 1934 toe = new (*this,8) TypeOfExprType(tofExpr, Canonical); 1935 } 1936 Types.push_back(toe); 1937 return QualType(toe, 0); 1938} 1939 1940/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 1941/// TypeOfType AST's. The only motivation to unique these nodes would be 1942/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 1943/// an issue. This doesn't effect the type checker, since it operates 1944/// on canonical type's (which are always unique). 1945QualType ASTContext::getTypeOfType(QualType tofType) { 1946 QualType Canonical = getCanonicalType(tofType); 1947 TypeOfType *tot = new (*this,8) TypeOfType(tofType, Canonical); 1948 Types.push_back(tot); 1949 return QualType(tot, 0); 1950} 1951 1952/// getDecltypeForExpr - Given an expr, will return the decltype for that 1953/// expression, according to the rules in C++0x [dcl.type.simple]p4 1954static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 1955 if (e->isTypeDependent()) 1956 return Context.DependentTy; 1957 1958 // If e is an id expression or a class member access, decltype(e) is defined 1959 // as the type of the entity named by e. 1960 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 1961 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 1962 return VD->getType(); 1963 } 1964 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 1965 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 1966 return FD->getType(); 1967 } 1968 // If e is a function call or an invocation of an overloaded operator, 1969 // (parentheses around e are ignored), decltype(e) is defined as the 1970 // return type of that function. 1971 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 1972 return CE->getCallReturnType(); 1973 1974 QualType T = e->getType(); 1975 1976 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 1977 // defined as T&, otherwise decltype(e) is defined as T. 1978 if (e->isLvalue(Context) == Expr::LV_Valid) 1979 T = Context.getLValueReferenceType(T); 1980 1981 return T; 1982} 1983 1984/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 1985/// DecltypeType AST's. The only motivation to unique these nodes would be 1986/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 1987/// an issue. This doesn't effect the type checker, since it operates 1988/// on canonical type's (which are always unique). 1989QualType ASTContext::getDecltypeType(Expr *e) { 1990 DecltypeType *dt; 1991 if (e->isTypeDependent()) // FIXME: canonicalize the expression 1992 dt = new (*this, 8) DecltypeType(e, DependentTy); 1993 else { 1994 QualType T = getDecltypeForExpr(e, *this); 1995 dt = new (*this, 8) DecltypeType(e, T, getCanonicalType(T)); 1996 } 1997 Types.push_back(dt); 1998 return QualType(dt, 0); 1999} 2000 2001/// getTagDeclType - Return the unique reference to the type for the 2002/// specified TagDecl (struct/union/class/enum) decl. 2003QualType ASTContext::getTagDeclType(TagDecl *Decl) { 2004 assert (Decl); 2005 return getTypeDeclType(Decl); 2006} 2007 2008/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2009/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2010/// needs to agree with the definition in <stddef.h>. 2011QualType ASTContext::getSizeType() const { 2012 return getFromTargetType(Target.getSizeType()); 2013} 2014 2015/// getSignedWCharType - Return the type of "signed wchar_t". 2016/// Used when in C++, as a GCC extension. 2017QualType ASTContext::getSignedWCharType() const { 2018 // FIXME: derive from "Target" ? 2019 return WCharTy; 2020} 2021 2022/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2023/// Used when in C++, as a GCC extension. 2024QualType ASTContext::getUnsignedWCharType() const { 2025 // FIXME: derive from "Target" ? 2026 return UnsignedIntTy; 2027} 2028 2029/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2030/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2031QualType ASTContext::getPointerDiffType() const { 2032 return getFromTargetType(Target.getPtrDiffType(0)); 2033} 2034 2035//===----------------------------------------------------------------------===// 2036// Type Operators 2037//===----------------------------------------------------------------------===// 2038 2039/// getCanonicalType - Return the canonical (structural) type corresponding to 2040/// the specified potentially non-canonical type. The non-canonical version 2041/// of a type may have many "decorated" versions of types. Decorators can 2042/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2043/// to be free of any of these, allowing two canonical types to be compared 2044/// for exact equality with a simple pointer comparison. 2045QualType ASTContext::getCanonicalType(QualType T) { 2046 QualType CanType = T.getTypePtr()->getCanonicalTypeInternal(); 2047 2048 // If the result has type qualifiers, make sure to canonicalize them as well. 2049 unsigned TypeQuals = T.getCVRQualifiers() | CanType.getCVRQualifiers(); 2050 if (TypeQuals == 0) return CanType; 2051 2052 // If the type qualifiers are on an array type, get the canonical type of the 2053 // array with the qualifiers applied to the element type. 2054 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2055 if (!AT) 2056 return CanType.getQualifiedType(TypeQuals); 2057 2058 // Get the canonical version of the element with the extra qualifiers on it. 2059 // This can recursively sink qualifiers through multiple levels of arrays. 2060 QualType NewEltTy=AT->getElementType().getWithAdditionalQualifiers(TypeQuals); 2061 NewEltTy = getCanonicalType(NewEltTy); 2062 2063 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2064 return getConstantArrayType(NewEltTy, CAT->getSize(),CAT->getSizeModifier(), 2065 CAT->getIndexTypeQualifier()); 2066 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2067 return getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2068 IAT->getIndexTypeQualifier()); 2069 2070 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2071 return getDependentSizedArrayType(NewEltTy, 2072 DSAT->getSizeExpr(), 2073 DSAT->getSizeModifier(), 2074 DSAT->getIndexTypeQualifier(), 2075 DSAT->getBracketsRange()); 2076 2077 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2078 return getVariableArrayType(NewEltTy, 2079 VAT->getSizeExpr(), 2080 VAT->getSizeModifier(), 2081 VAT->getIndexTypeQualifier(), 2082 VAT->getBracketsRange()); 2083} 2084 2085Decl *ASTContext::getCanonicalDecl(Decl *D) { 2086 if (!D) 2087 return 0; 2088 2089 if (TagDecl *Tag = dyn_cast<TagDecl>(D)) { 2090 QualType T = getTagDeclType(Tag); 2091 return cast<TagDecl>(cast<TagType>(T.getTypePtr()->CanonicalType) 2092 ->getDecl()); 2093 } 2094 2095 if (ClassTemplateDecl *Template = dyn_cast<ClassTemplateDecl>(D)) { 2096 while (Template->getPreviousDeclaration()) 2097 Template = Template->getPreviousDeclaration(); 2098 return Template; 2099 } 2100 2101 if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { 2102 while (Function->getPreviousDeclaration()) 2103 Function = Function->getPreviousDeclaration(); 2104 return const_cast<FunctionDecl *>(Function); 2105 } 2106 2107 if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D)) { 2108 while (FunTmpl->getPreviousDeclaration()) 2109 FunTmpl = FunTmpl->getPreviousDeclaration(); 2110 return FunTmpl; 2111 } 2112 2113 if (const VarDecl *Var = dyn_cast<VarDecl>(D)) { 2114 while (Var->getPreviousDeclaration()) 2115 Var = Var->getPreviousDeclaration(); 2116 return const_cast<VarDecl *>(Var); 2117 } 2118 2119 return D; 2120} 2121 2122TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2123 // If this template name refers to a template, the canonical 2124 // template name merely stores the template itself. 2125 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2126 return TemplateName(cast<TemplateDecl>(getCanonicalDecl(Template))); 2127 2128 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2129 assert(DTN && "Non-dependent template names must refer to template decls."); 2130 return DTN->CanonicalTemplateName; 2131} 2132 2133NestedNameSpecifier * 2134ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2135 if (!NNS) 2136 return 0; 2137 2138 switch (NNS->getKind()) { 2139 case NestedNameSpecifier::Identifier: 2140 // Canonicalize the prefix but keep the identifier the same. 2141 return NestedNameSpecifier::Create(*this, 2142 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2143 NNS->getAsIdentifier()); 2144 2145 case NestedNameSpecifier::Namespace: 2146 // A namespace is canonical; build a nested-name-specifier with 2147 // this namespace and no prefix. 2148 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2149 2150 case NestedNameSpecifier::TypeSpec: 2151 case NestedNameSpecifier::TypeSpecWithTemplate: { 2152 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2153 NestedNameSpecifier *Prefix = 0; 2154 2155 // FIXME: This isn't the right check! 2156 if (T->isDependentType()) 2157 Prefix = getCanonicalNestedNameSpecifier(NNS->getPrefix()); 2158 2159 return NestedNameSpecifier::Create(*this, Prefix, 2160 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2161 T.getTypePtr()); 2162 } 2163 2164 case NestedNameSpecifier::Global: 2165 // The global specifier is canonical and unique. 2166 return NNS; 2167 } 2168 2169 // Required to silence a GCC warning 2170 return 0; 2171} 2172 2173 2174const ArrayType *ASTContext::getAsArrayType(QualType T) { 2175 // Handle the non-qualified case efficiently. 2176 if (T.getCVRQualifiers() == 0) { 2177 // Handle the common positive case fast. 2178 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2179 return AT; 2180 } 2181 2182 // Handle the common negative case fast, ignoring CVR qualifiers. 2183 QualType CType = T->getCanonicalTypeInternal(); 2184 2185 // Make sure to look through type qualifiers (like ExtQuals) for the negative 2186 // test. 2187 if (!isa<ArrayType>(CType) && 2188 !isa<ArrayType>(CType.getUnqualifiedType())) 2189 return 0; 2190 2191 // Apply any CVR qualifiers from the array type to the element type. This 2192 // implements C99 6.7.3p8: "If the specification of an array type includes 2193 // any type qualifiers, the element type is so qualified, not the array type." 2194 2195 // If we get here, we either have type qualifiers on the type, or we have 2196 // sugar such as a typedef in the way. If we have type qualifiers on the type 2197 // we must propagate them down into the elemeng type. 2198 unsigned CVRQuals = T.getCVRQualifiers(); 2199 unsigned AddrSpace = 0; 2200 Type *Ty = T.getTypePtr(); 2201 2202 // Rip through ExtQualType's and typedefs to get to a concrete type. 2203 while (1) { 2204 if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(Ty)) { 2205 AddrSpace = EXTQT->getAddressSpace(); 2206 Ty = EXTQT->getBaseType(); 2207 } else { 2208 T = Ty->getDesugaredType(); 2209 if (T.getTypePtr() == Ty && T.getCVRQualifiers() == 0) 2210 break; 2211 CVRQuals |= T.getCVRQualifiers(); 2212 Ty = T.getTypePtr(); 2213 } 2214 } 2215 2216 // If we have a simple case, just return now. 2217 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2218 if (ATy == 0 || (AddrSpace == 0 && CVRQuals == 0)) 2219 return ATy; 2220 2221 // Otherwise, we have an array and we have qualifiers on it. Push the 2222 // qualifiers into the array element type and return a new array type. 2223 // Get the canonical version of the element with the extra qualifiers on it. 2224 // This can recursively sink qualifiers through multiple levels of arrays. 2225 QualType NewEltTy = ATy->getElementType(); 2226 if (AddrSpace) 2227 NewEltTy = getAddrSpaceQualType(NewEltTy, AddrSpace); 2228 NewEltTy = NewEltTy.getWithAdditionalQualifiers(CVRQuals); 2229 2230 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2231 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2232 CAT->getSizeModifier(), 2233 CAT->getIndexTypeQualifier())); 2234 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2235 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2236 IAT->getSizeModifier(), 2237 IAT->getIndexTypeQualifier())); 2238 2239 if (const DependentSizedArrayType *DSAT 2240 = dyn_cast<DependentSizedArrayType>(ATy)) 2241 return cast<ArrayType>( 2242 getDependentSizedArrayType(NewEltTy, 2243 DSAT->getSizeExpr(), 2244 DSAT->getSizeModifier(), 2245 DSAT->getIndexTypeQualifier(), 2246 DSAT->getBracketsRange())); 2247 2248 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2249 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2250 VAT->getSizeExpr(), 2251 VAT->getSizeModifier(), 2252 VAT->getIndexTypeQualifier(), 2253 VAT->getBracketsRange())); 2254} 2255 2256 2257/// getArrayDecayedType - Return the properly qualified result of decaying the 2258/// specified array type to a pointer. This operation is non-trivial when 2259/// handling typedefs etc. The canonical type of "T" must be an array type, 2260/// this returns a pointer to a properly qualified element of the array. 2261/// 2262/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2263QualType ASTContext::getArrayDecayedType(QualType Ty) { 2264 // Get the element type with 'getAsArrayType' so that we don't lose any 2265 // typedefs in the element type of the array. This also handles propagation 2266 // of type qualifiers from the array type into the element type if present 2267 // (C99 6.7.3p8). 2268 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2269 assert(PrettyArrayType && "Not an array type!"); 2270 2271 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2272 2273 // int x[restrict 4] -> int *restrict 2274 return PtrTy.getQualifiedType(PrettyArrayType->getIndexTypeQualifier()); 2275} 2276 2277QualType ASTContext::getBaseElementType(const VariableArrayType *VAT) { 2278 QualType ElemTy = VAT->getElementType(); 2279 2280 if (const VariableArrayType *VAT = getAsVariableArrayType(ElemTy)) 2281 return getBaseElementType(VAT); 2282 2283 return ElemTy; 2284} 2285 2286/// getFloatingRank - Return a relative rank for floating point types. 2287/// This routine will assert if passed a built-in type that isn't a float. 2288static FloatingRank getFloatingRank(QualType T) { 2289 if (const ComplexType *CT = T->getAsComplexType()) 2290 return getFloatingRank(CT->getElementType()); 2291 2292 assert(T->getAsBuiltinType() && "getFloatingRank(): not a floating type"); 2293 switch (T->getAsBuiltinType()->getKind()) { 2294 default: assert(0 && "getFloatingRank(): not a floating type"); 2295 case BuiltinType::Float: return FloatRank; 2296 case BuiltinType::Double: return DoubleRank; 2297 case BuiltinType::LongDouble: return LongDoubleRank; 2298 } 2299} 2300 2301/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2302/// point or a complex type (based on typeDomain/typeSize). 2303/// 'typeDomain' is a real floating point or complex type. 2304/// 'typeSize' is a real floating point or complex type. 2305QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2306 QualType Domain) const { 2307 FloatingRank EltRank = getFloatingRank(Size); 2308 if (Domain->isComplexType()) { 2309 switch (EltRank) { 2310 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2311 case FloatRank: return FloatComplexTy; 2312 case DoubleRank: return DoubleComplexTy; 2313 case LongDoubleRank: return LongDoubleComplexTy; 2314 } 2315 } 2316 2317 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2318 switch (EltRank) { 2319 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2320 case FloatRank: return FloatTy; 2321 case DoubleRank: return DoubleTy; 2322 case LongDoubleRank: return LongDoubleTy; 2323 } 2324} 2325 2326/// getFloatingTypeOrder - Compare the rank of the two specified floating 2327/// point types, ignoring the domain of the type (i.e. 'double' == 2328/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2329/// LHS < RHS, return -1. 2330int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2331 FloatingRank LHSR = getFloatingRank(LHS); 2332 FloatingRank RHSR = getFloatingRank(RHS); 2333 2334 if (LHSR == RHSR) 2335 return 0; 2336 if (LHSR > RHSR) 2337 return 1; 2338 return -1; 2339} 2340 2341/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2342/// routine will assert if passed a built-in type that isn't an integer or enum, 2343/// or if it is not canonicalized. 2344unsigned ASTContext::getIntegerRank(Type *T) { 2345 assert(T->isCanonical() && "T should be canonicalized"); 2346 if (EnumType* ET = dyn_cast<EnumType>(T)) 2347 T = ET->getDecl()->getIntegerType().getTypePtr(); 2348 2349 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2350 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2351 2352 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2353 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2354 2355 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2356 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2357 2358 // There are two things which impact the integer rank: the width, and 2359 // the ordering of builtins. The builtin ordering is encoded in the 2360 // bottom three bits; the width is encoded in the bits above that. 2361 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) 2362 return FWIT->getWidth() << 3; 2363 2364 switch (cast<BuiltinType>(T)->getKind()) { 2365 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2366 case BuiltinType::Bool: 2367 return 1 + (getIntWidth(BoolTy) << 3); 2368 case BuiltinType::Char_S: 2369 case BuiltinType::Char_U: 2370 case BuiltinType::SChar: 2371 case BuiltinType::UChar: 2372 return 2 + (getIntWidth(CharTy) << 3); 2373 case BuiltinType::Short: 2374 case BuiltinType::UShort: 2375 return 3 + (getIntWidth(ShortTy) << 3); 2376 case BuiltinType::Int: 2377 case BuiltinType::UInt: 2378 return 4 + (getIntWidth(IntTy) << 3); 2379 case BuiltinType::Long: 2380 case BuiltinType::ULong: 2381 return 5 + (getIntWidth(LongTy) << 3); 2382 case BuiltinType::LongLong: 2383 case BuiltinType::ULongLong: 2384 return 6 + (getIntWidth(LongLongTy) << 3); 2385 case BuiltinType::Int128: 2386 case BuiltinType::UInt128: 2387 return 7 + (getIntWidth(Int128Ty) << 3); 2388 } 2389} 2390 2391/// getIntegerTypeOrder - Returns the highest ranked integer type: 2392/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2393/// LHS < RHS, return -1. 2394int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2395 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2396 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2397 if (LHSC == RHSC) return 0; 2398 2399 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2400 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2401 2402 unsigned LHSRank = getIntegerRank(LHSC); 2403 unsigned RHSRank = getIntegerRank(RHSC); 2404 2405 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2406 if (LHSRank == RHSRank) return 0; 2407 return LHSRank > RHSRank ? 1 : -1; 2408 } 2409 2410 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2411 if (LHSUnsigned) { 2412 // If the unsigned [LHS] type is larger, return it. 2413 if (LHSRank >= RHSRank) 2414 return 1; 2415 2416 // If the signed type can represent all values of the unsigned type, it 2417 // wins. Because we are dealing with 2's complement and types that are 2418 // powers of two larger than each other, this is always safe. 2419 return -1; 2420 } 2421 2422 // If the unsigned [RHS] type is larger, return it. 2423 if (RHSRank >= LHSRank) 2424 return -1; 2425 2426 // If the signed type can represent all values of the unsigned type, it 2427 // wins. Because we are dealing with 2's complement and types that are 2428 // powers of two larger than each other, this is always safe. 2429 return 1; 2430} 2431 2432// getCFConstantStringType - Return the type used for constant CFStrings. 2433QualType ASTContext::getCFConstantStringType() { 2434 if (!CFConstantStringTypeDecl) { 2435 CFConstantStringTypeDecl = 2436 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2437 &Idents.get("NSConstantString")); 2438 QualType FieldTypes[4]; 2439 2440 // const int *isa; 2441 FieldTypes[0] = getPointerType(IntTy.getQualifiedType(QualType::Const)); 2442 // int flags; 2443 FieldTypes[1] = IntTy; 2444 // const char *str; 2445 FieldTypes[2] = getPointerType(CharTy.getQualifiedType(QualType::Const)); 2446 // long length; 2447 FieldTypes[3] = LongTy; 2448 2449 // Create fields 2450 for (unsigned i = 0; i < 4; ++i) { 2451 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2452 SourceLocation(), 0, 2453 FieldTypes[i], /*BitWidth=*/0, 2454 /*Mutable=*/false); 2455 CFConstantStringTypeDecl->addDecl(Field); 2456 } 2457 2458 CFConstantStringTypeDecl->completeDefinition(*this); 2459 } 2460 2461 return getTagDeclType(CFConstantStringTypeDecl); 2462} 2463 2464void ASTContext::setCFConstantStringType(QualType T) { 2465 const RecordType *Rec = T->getAsRecordType(); 2466 assert(Rec && "Invalid CFConstantStringType"); 2467 CFConstantStringTypeDecl = Rec->getDecl(); 2468} 2469 2470QualType ASTContext::getObjCFastEnumerationStateType() 2471{ 2472 if (!ObjCFastEnumerationStateTypeDecl) { 2473 ObjCFastEnumerationStateTypeDecl = 2474 RecordDecl::Create(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2475 &Idents.get("__objcFastEnumerationState")); 2476 2477 QualType FieldTypes[] = { 2478 UnsignedLongTy, 2479 getPointerType(ObjCIdTypedefType), 2480 getPointerType(UnsignedLongTy), 2481 getConstantArrayType(UnsignedLongTy, 2482 llvm::APInt(32, 5), ArrayType::Normal, 0) 2483 }; 2484 2485 for (size_t i = 0; i < 4; ++i) { 2486 FieldDecl *Field = FieldDecl::Create(*this, 2487 ObjCFastEnumerationStateTypeDecl, 2488 SourceLocation(), 0, 2489 FieldTypes[i], /*BitWidth=*/0, 2490 /*Mutable=*/false); 2491 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2492 } 2493 2494 ObjCFastEnumerationStateTypeDecl->completeDefinition(*this); 2495 } 2496 2497 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2498} 2499 2500void ASTContext::setObjCFastEnumerationStateType(QualType T) { 2501 const RecordType *Rec = T->getAsRecordType(); 2502 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 2503 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 2504} 2505 2506// This returns true if a type has been typedefed to BOOL: 2507// typedef <type> BOOL; 2508static bool isTypeTypedefedAsBOOL(QualType T) { 2509 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 2510 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 2511 return II->isStr("BOOL"); 2512 2513 return false; 2514} 2515 2516/// getObjCEncodingTypeSize returns size of type for objective-c encoding 2517/// purpose. 2518int ASTContext::getObjCEncodingTypeSize(QualType type) { 2519 uint64_t sz = getTypeSize(type); 2520 2521 // Make all integer and enum types at least as large as an int 2522 if (sz > 0 && type->isIntegralType()) 2523 sz = std::max(sz, getTypeSize(IntTy)); 2524 // Treat arrays as pointers, since that's how they're passed in. 2525 else if (type->isArrayType()) 2526 sz = getTypeSize(VoidPtrTy); 2527 return sz / getTypeSize(CharTy); 2528} 2529 2530/// getObjCEncodingForMethodDecl - Return the encoded type for this method 2531/// declaration. 2532void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 2533 std::string& S) { 2534 // FIXME: This is not very efficient. 2535 // Encode type qualifer, 'in', 'inout', etc. for the return type. 2536 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 2537 // Encode result type. 2538 getObjCEncodingForType(Decl->getResultType(), S); 2539 // Compute size of all parameters. 2540 // Start with computing size of a pointer in number of bytes. 2541 // FIXME: There might(should) be a better way of doing this computation! 2542 SourceLocation Loc; 2543 int PtrSize = getTypeSize(VoidPtrTy) / getTypeSize(CharTy); 2544 // The first two arguments (self and _cmd) are pointers; account for 2545 // their size. 2546 int ParmOffset = 2 * PtrSize; 2547 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 2548 E = Decl->param_end(); PI != E; ++PI) { 2549 QualType PType = (*PI)->getType(); 2550 int sz = getObjCEncodingTypeSize(PType); 2551 assert (sz > 0 && "getObjCEncodingForMethodDecl - Incomplete param type"); 2552 ParmOffset += sz; 2553 } 2554 S += llvm::utostr(ParmOffset); 2555 S += "@0:"; 2556 S += llvm::utostr(PtrSize); 2557 2558 // Argument types. 2559 ParmOffset = 2 * PtrSize; 2560 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 2561 E = Decl->param_end(); PI != E; ++PI) { 2562 ParmVarDecl *PVDecl = *PI; 2563 QualType PType = PVDecl->getOriginalType(); 2564 if (const ArrayType *AT = 2565 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 2566 // Use array's original type only if it has known number of 2567 // elements. 2568 if (!isa<ConstantArrayType>(AT)) 2569 PType = PVDecl->getType(); 2570 } else if (PType->isFunctionType()) 2571 PType = PVDecl->getType(); 2572 // Process argument qualifiers for user supplied arguments; such as, 2573 // 'in', 'inout', etc. 2574 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 2575 getObjCEncodingForType(PType, S); 2576 S += llvm::utostr(ParmOffset); 2577 ParmOffset += getObjCEncodingTypeSize(PType); 2578 } 2579} 2580 2581/// getObjCEncodingForPropertyDecl - Return the encoded type for this 2582/// property declaration. If non-NULL, Container must be either an 2583/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 2584/// NULL when getting encodings for protocol properties. 2585/// Property attributes are stored as a comma-delimited C string. The simple 2586/// attributes readonly and bycopy are encoded as single characters. The 2587/// parametrized attributes, getter=name, setter=name, and ivar=name, are 2588/// encoded as single characters, followed by an identifier. Property types 2589/// are also encoded as a parametrized attribute. The characters used to encode 2590/// these attributes are defined by the following enumeration: 2591/// @code 2592/// enum PropertyAttributes { 2593/// kPropertyReadOnly = 'R', // property is read-only. 2594/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 2595/// kPropertyByref = '&', // property is a reference to the value last assigned 2596/// kPropertyDynamic = 'D', // property is dynamic 2597/// kPropertyGetter = 'G', // followed by getter selector name 2598/// kPropertySetter = 'S', // followed by setter selector name 2599/// kPropertyInstanceVariable = 'V' // followed by instance variable name 2600/// kPropertyType = 't' // followed by old-style type encoding. 2601/// kPropertyWeak = 'W' // 'weak' property 2602/// kPropertyStrong = 'P' // property GC'able 2603/// kPropertyNonAtomic = 'N' // property non-atomic 2604/// }; 2605/// @endcode 2606void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 2607 const Decl *Container, 2608 std::string& S) { 2609 // Collect information from the property implementation decl(s). 2610 bool Dynamic = false; 2611 ObjCPropertyImplDecl *SynthesizePID = 0; 2612 2613 // FIXME: Duplicated code due to poor abstraction. 2614 if (Container) { 2615 if (const ObjCCategoryImplDecl *CID = 2616 dyn_cast<ObjCCategoryImplDecl>(Container)) { 2617 for (ObjCCategoryImplDecl::propimpl_iterator 2618 i = CID->propimpl_begin(), e = CID->propimpl_end(); 2619 i != e; ++i) { 2620 ObjCPropertyImplDecl *PID = *i; 2621 if (PID->getPropertyDecl() == PD) { 2622 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 2623 Dynamic = true; 2624 } else { 2625 SynthesizePID = PID; 2626 } 2627 } 2628 } 2629 } else { 2630 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 2631 for (ObjCCategoryImplDecl::propimpl_iterator 2632 i = OID->propimpl_begin(), e = OID->propimpl_end(); 2633 i != e; ++i) { 2634 ObjCPropertyImplDecl *PID = *i; 2635 if (PID->getPropertyDecl() == PD) { 2636 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 2637 Dynamic = true; 2638 } else { 2639 SynthesizePID = PID; 2640 } 2641 } 2642 } 2643 } 2644 } 2645 2646 // FIXME: This is not very efficient. 2647 S = "T"; 2648 2649 // Encode result type. 2650 // GCC has some special rules regarding encoding of properties which 2651 // closely resembles encoding of ivars. 2652 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 2653 true /* outermost type */, 2654 true /* encoding for property */); 2655 2656 if (PD->isReadOnly()) { 2657 S += ",R"; 2658 } else { 2659 switch (PD->getSetterKind()) { 2660 case ObjCPropertyDecl::Assign: break; 2661 case ObjCPropertyDecl::Copy: S += ",C"; break; 2662 case ObjCPropertyDecl::Retain: S += ",&"; break; 2663 } 2664 } 2665 2666 // It really isn't clear at all what this means, since properties 2667 // are "dynamic by default". 2668 if (Dynamic) 2669 S += ",D"; 2670 2671 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 2672 S += ",N"; 2673 2674 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 2675 S += ",G"; 2676 S += PD->getGetterName().getAsString(); 2677 } 2678 2679 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 2680 S += ",S"; 2681 S += PD->getSetterName().getAsString(); 2682 } 2683 2684 if (SynthesizePID) { 2685 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 2686 S += ",V"; 2687 S += OID->getNameAsString(); 2688 } 2689 2690 // FIXME: OBJCGC: weak & strong 2691} 2692 2693/// getLegacyIntegralTypeEncoding - 2694/// Another legacy compatibility encoding: 32-bit longs are encoded as 2695/// 'l' or 'L' , but not always. For typedefs, we need to use 2696/// 'i' or 'I' instead if encoding a struct field, or a pointer! 2697/// 2698void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 2699 if (dyn_cast<TypedefType>(PointeeTy.getTypePtr())) { 2700 if (const BuiltinType *BT = PointeeTy->getAsBuiltinType()) { 2701 if (BT->getKind() == BuiltinType::ULong && 2702 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 2703 PointeeTy = UnsignedIntTy; 2704 else 2705 if (BT->getKind() == BuiltinType::Long && 2706 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 2707 PointeeTy = IntTy; 2708 } 2709 } 2710} 2711 2712void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 2713 const FieldDecl *Field) { 2714 // We follow the behavior of gcc, expanding structures which are 2715 // directly pointed to, and expanding embedded structures. Note that 2716 // these rules are sufficient to prevent recursive encoding of the 2717 // same type. 2718 getObjCEncodingForTypeImpl(T, S, true, true, Field, 2719 true /* outermost type */); 2720} 2721 2722static void EncodeBitField(const ASTContext *Context, std::string& S, 2723 const FieldDecl *FD) { 2724 const Expr *E = FD->getBitWidth(); 2725 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 2726 ASTContext *Ctx = const_cast<ASTContext*>(Context); 2727 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 2728 S += 'b'; 2729 S += llvm::utostr(N); 2730} 2731 2732void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 2733 bool ExpandPointedToStructures, 2734 bool ExpandStructures, 2735 const FieldDecl *FD, 2736 bool OutermostType, 2737 bool EncodingProperty) { 2738 if (const BuiltinType *BT = T->getAsBuiltinType()) { 2739 if (FD && FD->isBitField()) 2740 return EncodeBitField(this, S, FD); 2741 char encoding; 2742 switch (BT->getKind()) { 2743 default: assert(0 && "Unhandled builtin type kind"); 2744 case BuiltinType::Void: encoding = 'v'; break; 2745 case BuiltinType::Bool: encoding = 'B'; break; 2746 case BuiltinType::Char_U: 2747 case BuiltinType::UChar: encoding = 'C'; break; 2748 case BuiltinType::UShort: encoding = 'S'; break; 2749 case BuiltinType::UInt: encoding = 'I'; break; 2750 case BuiltinType::ULong: 2751 encoding = 2752 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 2753 break; 2754 case BuiltinType::UInt128: encoding = 'T'; break; 2755 case BuiltinType::ULongLong: encoding = 'Q'; break; 2756 case BuiltinType::Char_S: 2757 case BuiltinType::SChar: encoding = 'c'; break; 2758 case BuiltinType::Short: encoding = 's'; break; 2759 case BuiltinType::Int: encoding = 'i'; break; 2760 case BuiltinType::Long: 2761 encoding = 2762 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 2763 break; 2764 case BuiltinType::LongLong: encoding = 'q'; break; 2765 case BuiltinType::Int128: encoding = 't'; break; 2766 case BuiltinType::Float: encoding = 'f'; break; 2767 case BuiltinType::Double: encoding = 'd'; break; 2768 case BuiltinType::LongDouble: encoding = 'd'; break; 2769 } 2770 2771 S += encoding; 2772 return; 2773 } 2774 2775 if (const ComplexType *CT = T->getAsComplexType()) { 2776 S += 'j'; 2777 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 2778 false); 2779 return; 2780 } 2781 2782 if (const PointerType *PT = T->getAsPointerType()) { 2783 QualType PointeeTy = PT->getPointeeType(); 2784 bool isReadOnly = false; 2785 // For historical/compatibility reasons, the read-only qualifier of the 2786 // pointee gets emitted _before_ the '^'. The read-only qualifier of 2787 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 2788 // Also, do not emit the 'r' for anything but the outermost type! 2789 if (dyn_cast<TypedefType>(T.getTypePtr())) { 2790 if (OutermostType && T.isConstQualified()) { 2791 isReadOnly = true; 2792 S += 'r'; 2793 } 2794 } 2795 else if (OutermostType) { 2796 QualType P = PointeeTy; 2797 while (P->getAsPointerType()) 2798 P = P->getAsPointerType()->getPointeeType(); 2799 if (P.isConstQualified()) { 2800 isReadOnly = true; 2801 S += 'r'; 2802 } 2803 } 2804 if (isReadOnly) { 2805 // Another legacy compatibility encoding. Some ObjC qualifier and type 2806 // combinations need to be rearranged. 2807 // Rewrite "in const" from "nr" to "rn" 2808 const char * s = S.c_str(); 2809 int len = S.length(); 2810 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 2811 std::string replace = "rn"; 2812 S.replace(S.end()-2, S.end(), replace); 2813 } 2814 } 2815 if (isObjCSelType(PointeeTy)) { 2816 S += ':'; 2817 return; 2818 } 2819 2820 if (PointeeTy->isCharType()) { 2821 // char pointer types should be encoded as '*' unless it is a 2822 // type that has been typedef'd to 'BOOL'. 2823 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 2824 S += '*'; 2825 return; 2826 } 2827 } 2828 2829 S += '^'; 2830 getLegacyIntegralTypeEncoding(PointeeTy); 2831 2832 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 2833 NULL); 2834 return; 2835 } 2836 2837 if (const ArrayType *AT = 2838 // Ignore type qualifiers etc. 2839 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 2840 if (isa<IncompleteArrayType>(AT)) { 2841 // Incomplete arrays are encoded as a pointer to the array element. 2842 S += '^'; 2843 2844 getObjCEncodingForTypeImpl(AT->getElementType(), S, 2845 false, ExpandStructures, FD); 2846 } else { 2847 S += '['; 2848 2849 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2850 S += llvm::utostr(CAT->getSize().getZExtValue()); 2851 else { 2852 //Variable length arrays are encoded as a regular array with 0 elements. 2853 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 2854 S += '0'; 2855 } 2856 2857 getObjCEncodingForTypeImpl(AT->getElementType(), S, 2858 false, ExpandStructures, FD); 2859 S += ']'; 2860 } 2861 return; 2862 } 2863 2864 if (T->getAsFunctionType()) { 2865 S += '?'; 2866 return; 2867 } 2868 2869 if (const RecordType *RTy = T->getAsRecordType()) { 2870 RecordDecl *RDecl = RTy->getDecl(); 2871 S += RDecl->isUnion() ? '(' : '{'; 2872 // Anonymous structures print as '?' 2873 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 2874 S += II->getName(); 2875 } else { 2876 S += '?'; 2877 } 2878 if (ExpandStructures) { 2879 S += '='; 2880 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 2881 FieldEnd = RDecl->field_end(); 2882 Field != FieldEnd; ++Field) { 2883 if (FD) { 2884 S += '"'; 2885 S += Field->getNameAsString(); 2886 S += '"'; 2887 } 2888 2889 // Special case bit-fields. 2890 if (Field->isBitField()) { 2891 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 2892 (*Field)); 2893 } else { 2894 QualType qt = Field->getType(); 2895 getLegacyIntegralTypeEncoding(qt); 2896 getObjCEncodingForTypeImpl(qt, S, false, true, 2897 FD); 2898 } 2899 } 2900 } 2901 S += RDecl->isUnion() ? ')' : '}'; 2902 return; 2903 } 2904 2905 if (T->isEnumeralType()) { 2906 if (FD && FD->isBitField()) 2907 EncodeBitField(this, S, FD); 2908 else 2909 S += 'i'; 2910 return; 2911 } 2912 2913 if (T->isBlockPointerType()) { 2914 S += "@?"; // Unlike a pointer-to-function, which is "^?". 2915 return; 2916 } 2917 2918 if (T->isObjCInterfaceType()) { 2919 // @encode(class_name) 2920 ObjCInterfaceDecl *OI = T->getAsObjCInterfaceType()->getDecl(); 2921 S += '{'; 2922 const IdentifierInfo *II = OI->getIdentifier(); 2923 S += II->getName(); 2924 S += '='; 2925 llvm::SmallVector<FieldDecl*, 32> RecFields; 2926 CollectObjCIvars(OI, RecFields); 2927 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 2928 if (RecFields[i]->isBitField()) 2929 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 2930 RecFields[i]); 2931 else 2932 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 2933 FD); 2934 } 2935 S += '}'; 2936 return; 2937 } 2938 2939 if (const ObjCObjectPointerType *OPT = T->getAsObjCObjectPointerType()) { 2940 if (OPT->isObjCIdType()) { 2941 S += '@'; 2942 return; 2943 } 2944 2945 if (OPT->isObjCClassType()) { 2946 S += '#'; 2947 return; 2948 } 2949 2950 if (OPT->isObjCQualifiedIdType()) { 2951 getObjCEncodingForTypeImpl(getObjCIdType(), S, 2952 ExpandPointedToStructures, 2953 ExpandStructures, FD); 2954 if (FD || EncodingProperty) { 2955 // Note that we do extended encoding of protocol qualifer list 2956 // Only when doing ivar or property encoding. 2957 const ObjCObjectPointerType *QIDT = T->getAsObjCQualifiedIdType(); 2958 S += '"'; 2959 for (ObjCObjectPointerType::qual_iterator I = QIDT->qual_begin(), 2960 E = QIDT->qual_end(); I != E; ++I) { 2961 S += '<'; 2962 S += (*I)->getNameAsString(); 2963 S += '>'; 2964 } 2965 S += '"'; 2966 } 2967 return; 2968 } 2969 2970 QualType PointeeTy = OPT->getPointeeType(); 2971 if (!EncodingProperty && 2972 isa<TypedefType>(PointeeTy.getTypePtr())) { 2973 // Another historical/compatibility reason. 2974 // We encode the underlying type which comes out as 2975 // {...}; 2976 S += '^'; 2977 getObjCEncodingForTypeImpl(PointeeTy, S, 2978 false, ExpandPointedToStructures, 2979 NULL); 2980 return; 2981 } 2982 2983 S += '@'; 2984 if (FD || EncodingProperty) { 2985 const ObjCInterfaceType *OIT = OPT->getInterfaceType(); 2986 ObjCInterfaceDecl *OI = OIT->getDecl(); 2987 S += '"'; 2988 S += OI->getNameAsCString(); 2989 for (ObjCInterfaceType::qual_iterator I = OIT->qual_begin(), 2990 E = OIT->qual_end(); I != E; ++I) { 2991 S += '<'; 2992 S += (*I)->getNameAsString(); 2993 S += '>'; 2994 } 2995 S += '"'; 2996 } 2997 return; 2998 } 2999 3000 assert(0 && "@encode for type not implemented!"); 3001} 3002 3003void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3004 std::string& S) const { 3005 if (QT & Decl::OBJC_TQ_In) 3006 S += 'n'; 3007 if (QT & Decl::OBJC_TQ_Inout) 3008 S += 'N'; 3009 if (QT & Decl::OBJC_TQ_Out) 3010 S += 'o'; 3011 if (QT & Decl::OBJC_TQ_Bycopy) 3012 S += 'O'; 3013 if (QT & Decl::OBJC_TQ_Byref) 3014 S += 'R'; 3015 if (QT & Decl::OBJC_TQ_Oneway) 3016 S += 'V'; 3017} 3018 3019void ASTContext::setBuiltinVaListType(QualType T) { 3020 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3021 3022 BuiltinVaListType = T; 3023} 3024 3025void ASTContext::setObjCIdType(QualType T) { 3026 ObjCIdTypedefType = T; 3027} 3028 3029void ASTContext::setObjCSelType(QualType T) { 3030 ObjCSelType = T; 3031 3032 const TypedefType *TT = T->getAsTypedefType(); 3033 if (!TT) 3034 return; 3035 TypedefDecl *TD = TT->getDecl(); 3036 3037 // typedef struct objc_selector *SEL; 3038 const PointerType *ptr = TD->getUnderlyingType()->getAsPointerType(); 3039 if (!ptr) 3040 return; 3041 const RecordType *rec = ptr->getPointeeType()->getAsStructureType(); 3042 if (!rec) 3043 return; 3044 SelStructType = rec; 3045} 3046 3047void ASTContext::setObjCProtoType(QualType QT) { 3048 ObjCProtoType = QT; 3049} 3050 3051void ASTContext::setObjCClassType(QualType T) { 3052 ObjCClassTypedefType = T; 3053} 3054 3055void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3056 assert(ObjCConstantStringType.isNull() && 3057 "'NSConstantString' type already set!"); 3058 3059 ObjCConstantStringType = getObjCInterfaceType(Decl); 3060} 3061 3062/// \brief Retrieve the template name that represents a qualified 3063/// template name such as \c std::vector. 3064TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3065 bool TemplateKeyword, 3066 TemplateDecl *Template) { 3067 llvm::FoldingSetNodeID ID; 3068 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3069 3070 void *InsertPos = 0; 3071 QualifiedTemplateName *QTN = 3072 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3073 if (!QTN) { 3074 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3075 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3076 } 3077 3078 return TemplateName(QTN); 3079} 3080 3081/// \brief Retrieve the template name that represents a dependent 3082/// template name such as \c MetaFun::template apply. 3083TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3084 const IdentifierInfo *Name) { 3085 assert(NNS->isDependent() && "Nested name specifier must be dependent"); 3086 3087 llvm::FoldingSetNodeID ID; 3088 DependentTemplateName::Profile(ID, NNS, Name); 3089 3090 void *InsertPos = 0; 3091 DependentTemplateName *QTN = 3092 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3093 3094 if (QTN) 3095 return TemplateName(QTN); 3096 3097 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3098 if (CanonNNS == NNS) { 3099 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3100 } else { 3101 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3102 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3103 } 3104 3105 DependentTemplateNames.InsertNode(QTN, InsertPos); 3106 return TemplateName(QTN); 3107} 3108 3109/// getFromTargetType - Given one of the integer types provided by 3110/// TargetInfo, produce the corresponding type. The unsigned @p Type 3111/// is actually a value of type @c TargetInfo::IntType. 3112QualType ASTContext::getFromTargetType(unsigned Type) const { 3113 switch (Type) { 3114 case TargetInfo::NoInt: return QualType(); 3115 case TargetInfo::SignedShort: return ShortTy; 3116 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3117 case TargetInfo::SignedInt: return IntTy; 3118 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3119 case TargetInfo::SignedLong: return LongTy; 3120 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3121 case TargetInfo::SignedLongLong: return LongLongTy; 3122 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3123 } 3124 3125 assert(false && "Unhandled TargetInfo::IntType value"); 3126 return QualType(); 3127} 3128 3129//===----------------------------------------------------------------------===// 3130// Type Predicates. 3131//===----------------------------------------------------------------------===// 3132 3133/// isObjCNSObjectType - Return true if this is an NSObject object using 3134/// NSObject attribute on a c-style pointer type. 3135/// FIXME - Make it work directly on types. 3136/// FIXME: Move to Type. 3137/// 3138bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3139 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3140 if (TypedefDecl *TD = TDT->getDecl()) 3141 if (TD->getAttr<ObjCNSObjectAttr>()) 3142 return true; 3143 } 3144 return false; 3145} 3146 3147/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3148/// garbage collection attribute. 3149/// 3150QualType::GCAttrTypes ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3151 QualType::GCAttrTypes GCAttrs = QualType::GCNone; 3152 if (getLangOptions().ObjC1 && 3153 getLangOptions().getGCMode() != LangOptions::NonGC) { 3154 GCAttrs = Ty.getObjCGCAttr(); 3155 // Default behavious under objective-c's gc is for objective-c pointers 3156 // (or pointers to them) be treated as though they were declared 3157 // as __strong. 3158 if (GCAttrs == QualType::GCNone) { 3159 if (Ty->isObjCObjectPointerType()) 3160 GCAttrs = QualType::Strong; 3161 else if (Ty->isPointerType()) 3162 return getObjCGCAttrKind(Ty->getAsPointerType()->getPointeeType()); 3163 } 3164 // Non-pointers have none gc'able attribute regardless of the attribute 3165 // set on them. 3166 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3167 return QualType::GCNone; 3168 } 3169 return GCAttrs; 3170} 3171 3172//===----------------------------------------------------------------------===// 3173// Type Compatibility Testing 3174//===----------------------------------------------------------------------===// 3175 3176/// areCompatVectorTypes - Return true if the two specified vector types are 3177/// compatible. 3178static bool areCompatVectorTypes(const VectorType *LHS, 3179 const VectorType *RHS) { 3180 assert(LHS->isCanonical() && RHS->isCanonical()); 3181 return LHS->getElementType() == RHS->getElementType() && 3182 LHS->getNumElements() == RHS->getNumElements(); 3183} 3184 3185/// canAssignObjCInterfaces - Return true if the two interface types are 3186/// compatible for assignment from RHS to LHS. This handles validation of any 3187/// protocol qualifiers on the LHS or RHS. 3188/// 3189/// FIXME: Move the following to ObjCObjectPointerType/ObjCInterfaceType. 3190bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 3191 const ObjCObjectPointerType *RHSOPT) { 3192 // If either type represents the built-in 'id' or 'Class' types, return true. 3193 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 3194 return true; 3195 3196 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 3197 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 3198 if (!LHS || !RHS) { 3199 // We have qualified builtin types. 3200 // Both the right and left sides have qualifiers. 3201 for (ObjCObjectPointerType::qual_iterator I = LHSOPT->qual_begin(), 3202 E = LHSOPT->qual_end(); I != E; ++I) { 3203 bool RHSImplementsProtocol = false; 3204 3205 // when comparing an id<P> on lhs with a static type on rhs, 3206 // see if static class implements all of id's protocols, directly or 3207 // through its super class and categories. 3208 for (ObjCObjectPointerType::qual_iterator J = RHSOPT->qual_begin(), 3209 E = RHSOPT->qual_end(); J != E; ++J) { 3210 if ((*J)->lookupProtocolNamed((*I)->getIdentifier())) 3211 RHSImplementsProtocol = true; 3212 } 3213 if (!RHSImplementsProtocol) 3214 return false; 3215 } 3216 // The RHS implements all protocols listed on the LHS. 3217 return true; 3218 } 3219 return canAssignObjCInterfaces(LHS, RHS); 3220} 3221 3222bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 3223 const ObjCInterfaceType *RHS) { 3224 // Verify that the base decls are compatible: the RHS must be a subclass of 3225 // the LHS. 3226 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 3227 return false; 3228 3229 // RHS must have a superset of the protocols in the LHS. If the LHS is not 3230 // protocol qualified at all, then we are good. 3231 if (!isa<ObjCQualifiedInterfaceType>(LHS)) 3232 return true; 3233 3234 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 3235 // isn't a superset. 3236 if (!isa<ObjCQualifiedInterfaceType>(RHS)) 3237 return true; // FIXME: should return false! 3238 3239 // Finally, we must have two protocol-qualified interfaces. 3240 const ObjCQualifiedInterfaceType *LHSP =cast<ObjCQualifiedInterfaceType>(LHS); 3241 const ObjCQualifiedInterfaceType *RHSP =cast<ObjCQualifiedInterfaceType>(RHS); 3242 3243 // All LHS protocols must have a presence on the RHS. 3244 assert(LHSP->qual_begin() != LHSP->qual_end() && "Empty LHS protocol list?"); 3245 3246 for (ObjCQualifiedInterfaceType::qual_iterator LHSPI = LHSP->qual_begin(), 3247 LHSPE = LHSP->qual_end(); 3248 LHSPI != LHSPE; LHSPI++) { 3249 bool RHSImplementsProtocol = false; 3250 3251 // If the RHS doesn't implement the protocol on the left, the types 3252 // are incompatible. 3253 for (ObjCQualifiedInterfaceType::qual_iterator RHSPI = RHSP->qual_begin(), 3254 RHSPE = RHSP->qual_end(); 3255 !RHSImplementsProtocol && (RHSPI != RHSPE); RHSPI++) { 3256 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) 3257 RHSImplementsProtocol = true; 3258 } 3259 // FIXME: For better diagnostics, consider passing back the protocol name. 3260 if (!RHSImplementsProtocol) 3261 return false; 3262 } 3263 // The RHS implements all protocols listed on the LHS. 3264 return true; 3265} 3266 3267bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 3268 // get the "pointed to" types 3269 const ObjCObjectPointerType *LHSOPT = LHS->getAsObjCObjectPointerType(); 3270 const ObjCObjectPointerType *RHSOPT = RHS->getAsObjCObjectPointerType(); 3271 3272 if (!LHSOPT || !RHSOPT) 3273 return false; 3274 3275 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 3276 canAssignObjCInterfaces(RHSOPT, LHSOPT); 3277} 3278 3279/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 3280/// both shall have the identically qualified version of a compatible type. 3281/// C99 6.2.7p1: Two types have compatible types if their types are the 3282/// same. See 6.7.[2,3,5] for additional rules. 3283bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 3284 return !mergeTypes(LHS, RHS).isNull(); 3285} 3286 3287QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs) { 3288 const FunctionType *lbase = lhs->getAsFunctionType(); 3289 const FunctionType *rbase = rhs->getAsFunctionType(); 3290 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 3291 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 3292 bool allLTypes = true; 3293 bool allRTypes = true; 3294 3295 // Check return type 3296 QualType retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 3297 if (retType.isNull()) return QualType(); 3298 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 3299 allLTypes = false; 3300 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 3301 allRTypes = false; 3302 3303 if (lproto && rproto) { // two C99 style function prototypes 3304 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 3305 "C++ shouldn't be here"); 3306 unsigned lproto_nargs = lproto->getNumArgs(); 3307 unsigned rproto_nargs = rproto->getNumArgs(); 3308 3309 // Compatible functions must have the same number of arguments 3310 if (lproto_nargs != rproto_nargs) 3311 return QualType(); 3312 3313 // Variadic and non-variadic functions aren't compatible 3314 if (lproto->isVariadic() != rproto->isVariadic()) 3315 return QualType(); 3316 3317 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 3318 return QualType(); 3319 3320 // Check argument compatibility 3321 llvm::SmallVector<QualType, 10> types; 3322 for (unsigned i = 0; i < lproto_nargs; i++) { 3323 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 3324 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 3325 QualType argtype = mergeTypes(largtype, rargtype); 3326 if (argtype.isNull()) return QualType(); 3327 types.push_back(argtype); 3328 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 3329 allLTypes = false; 3330 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 3331 allRTypes = false; 3332 } 3333 if (allLTypes) return lhs; 3334 if (allRTypes) return rhs; 3335 return getFunctionType(retType, types.begin(), types.size(), 3336 lproto->isVariadic(), lproto->getTypeQuals()); 3337 } 3338 3339 if (lproto) allRTypes = false; 3340 if (rproto) allLTypes = false; 3341 3342 const FunctionProtoType *proto = lproto ? lproto : rproto; 3343 if (proto) { 3344 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 3345 if (proto->isVariadic()) return QualType(); 3346 // Check that the types are compatible with the types that 3347 // would result from default argument promotions (C99 6.7.5.3p15). 3348 // The only types actually affected are promotable integer 3349 // types and floats, which would be passed as a different 3350 // type depending on whether the prototype is visible. 3351 unsigned proto_nargs = proto->getNumArgs(); 3352 for (unsigned i = 0; i < proto_nargs; ++i) { 3353 QualType argTy = proto->getArgType(i); 3354 if (argTy->isPromotableIntegerType() || 3355 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 3356 return QualType(); 3357 } 3358 3359 if (allLTypes) return lhs; 3360 if (allRTypes) return rhs; 3361 return getFunctionType(retType, proto->arg_type_begin(), 3362 proto->getNumArgs(), lproto->isVariadic(), 3363 lproto->getTypeQuals()); 3364 } 3365 3366 if (allLTypes) return lhs; 3367 if (allRTypes) return rhs; 3368 return getFunctionNoProtoType(retType); 3369} 3370 3371QualType ASTContext::mergeTypes(QualType LHS, QualType RHS) { 3372 // C++ [expr]: If an expression initially has the type "reference to T", the 3373 // type is adjusted to "T" prior to any further analysis, the expression 3374 // designates the object or function denoted by the reference, and the 3375 // expression is an lvalue unless the reference is an rvalue reference and 3376 // the expression is a function call (possibly inside parentheses). 3377 // FIXME: C++ shouldn't be going through here! The rules are different 3378 // enough that they should be handled separately. 3379 // FIXME: Merging of lvalue and rvalue references is incorrect. C++ *really* 3380 // shouldn't be going through here! 3381 if (const ReferenceType *RT = LHS->getAsReferenceType()) 3382 LHS = RT->getPointeeType(); 3383 if (const ReferenceType *RT = RHS->getAsReferenceType()) 3384 RHS = RT->getPointeeType(); 3385 3386 QualType LHSCan = getCanonicalType(LHS), 3387 RHSCan = getCanonicalType(RHS); 3388 3389 // If two types are identical, they are compatible. 3390 if (LHSCan == RHSCan) 3391 return LHS; 3392 3393 // If the qualifiers are different, the types aren't compatible 3394 // Note that we handle extended qualifiers later, in the 3395 // case for ExtQualType. 3396 if (LHSCan.getCVRQualifiers() != RHSCan.getCVRQualifiers()) 3397 return QualType(); 3398 3399 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 3400 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 3401 3402 // We want to consider the two function types to be the same for these 3403 // comparisons, just force one to the other. 3404 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 3405 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 3406 3407 // Strip off objc_gc attributes off the top level so they can be merged. 3408 // This is a complete mess, but the attribute itself doesn't make much sense. 3409 if (RHSClass == Type::ExtQual) { 3410 QualType::GCAttrTypes GCAttr = RHSCan.getObjCGCAttr(); 3411 if (GCAttr != QualType::GCNone) { 3412 QualType::GCAttrTypes GCLHSAttr = LHSCan.getObjCGCAttr(); 3413 // __weak attribute must appear on both declarations. 3414 // __strong attribue is redundant if other decl is an objective-c 3415 // object pointer (or decorated with __strong attribute); otherwise 3416 // issue error. 3417 if ((GCAttr == QualType::Weak && GCLHSAttr != GCAttr) || 3418 (GCAttr == QualType::Strong && GCLHSAttr != GCAttr && 3419 !LHSCan->isObjCObjectPointerType())) 3420 return QualType(); 3421 3422 RHS = QualType(cast<ExtQualType>(RHS.getDesugaredType())->getBaseType(), 3423 RHS.getCVRQualifiers()); 3424 QualType Result = mergeTypes(LHS, RHS); 3425 if (!Result.isNull()) { 3426 if (Result.getObjCGCAttr() == QualType::GCNone) 3427 Result = getObjCGCQualType(Result, GCAttr); 3428 else if (Result.getObjCGCAttr() != GCAttr) 3429 Result = QualType(); 3430 } 3431 return Result; 3432 } 3433 } 3434 if (LHSClass == Type::ExtQual) { 3435 QualType::GCAttrTypes GCAttr = LHSCan.getObjCGCAttr(); 3436 if (GCAttr != QualType::GCNone) { 3437 QualType::GCAttrTypes GCRHSAttr = RHSCan.getObjCGCAttr(); 3438 // __weak attribute must appear on both declarations. __strong 3439 // __strong attribue is redundant if other decl is an objective-c 3440 // object pointer (or decorated with __strong attribute); otherwise 3441 // issue error. 3442 if ((GCAttr == QualType::Weak && GCRHSAttr != GCAttr) || 3443 (GCAttr == QualType::Strong && GCRHSAttr != GCAttr && 3444 !RHSCan->isObjCObjectPointerType())) 3445 return QualType(); 3446 3447 LHS = QualType(cast<ExtQualType>(LHS.getDesugaredType())->getBaseType(), 3448 LHS.getCVRQualifiers()); 3449 QualType Result = mergeTypes(LHS, RHS); 3450 if (!Result.isNull()) { 3451 if (Result.getObjCGCAttr() == QualType::GCNone) 3452 Result = getObjCGCQualType(Result, GCAttr); 3453 else if (Result.getObjCGCAttr() != GCAttr) 3454 Result = QualType(); 3455 } 3456 return Result; 3457 } 3458 } 3459 3460 // Same as above for arrays 3461 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 3462 LHSClass = Type::ConstantArray; 3463 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 3464 RHSClass = Type::ConstantArray; 3465 3466 // Canonicalize ExtVector -> Vector. 3467 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 3468 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 3469 3470 // Consider qualified interfaces and interfaces the same. 3471 // FIXME: Remove (ObjCObjectPointerType should obsolete this funny business). 3472 if (LHSClass == Type::ObjCQualifiedInterface) LHSClass = Type::ObjCInterface; 3473 if (RHSClass == Type::ObjCQualifiedInterface) RHSClass = Type::ObjCInterface; 3474 3475 // If the canonical type classes don't match. 3476 if (LHSClass != RHSClass) { 3477 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 3478 // a signed integer type, or an unsigned integer type. 3479 if (const EnumType* ETy = LHS->getAsEnumType()) { 3480 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 3481 return RHS; 3482 } 3483 if (const EnumType* ETy = RHS->getAsEnumType()) { 3484 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 3485 return LHS; 3486 } 3487 3488 return QualType(); 3489 } 3490 3491 // The canonical type classes match. 3492 switch (LHSClass) { 3493#define TYPE(Class, Base) 3494#define ABSTRACT_TYPE(Class, Base) 3495#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 3496#define DEPENDENT_TYPE(Class, Base) case Type::Class: 3497#include "clang/AST/TypeNodes.def" 3498 assert(false && "Non-canonical and dependent types shouldn't get here"); 3499 return QualType(); 3500 3501 case Type::LValueReference: 3502 case Type::RValueReference: 3503 case Type::MemberPointer: 3504 assert(false && "C++ should never be in mergeTypes"); 3505 return QualType(); 3506 3507 case Type::IncompleteArray: 3508 case Type::VariableArray: 3509 case Type::FunctionProto: 3510 case Type::ExtVector: 3511 case Type::ObjCQualifiedInterface: 3512 assert(false && "Types are eliminated above"); 3513 return QualType(); 3514 3515 case Type::Pointer: 3516 { 3517 // Merge two pointer types, while trying to preserve typedef info 3518 QualType LHSPointee = LHS->getAsPointerType()->getPointeeType(); 3519 QualType RHSPointee = RHS->getAsPointerType()->getPointeeType(); 3520 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 3521 if (ResultType.isNull()) return QualType(); 3522 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 3523 return LHS; 3524 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 3525 return RHS; 3526 return getPointerType(ResultType); 3527 } 3528 case Type::BlockPointer: 3529 { 3530 // Merge two block pointer types, while trying to preserve typedef info 3531 QualType LHSPointee = LHS->getAsBlockPointerType()->getPointeeType(); 3532 QualType RHSPointee = RHS->getAsBlockPointerType()->getPointeeType(); 3533 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 3534 if (ResultType.isNull()) return QualType(); 3535 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 3536 return LHS; 3537 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 3538 return RHS; 3539 return getBlockPointerType(ResultType); 3540 } 3541 case Type::ConstantArray: 3542 { 3543 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 3544 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 3545 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 3546 return QualType(); 3547 3548 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 3549 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 3550 QualType ResultType = mergeTypes(LHSElem, RHSElem); 3551 if (ResultType.isNull()) return QualType(); 3552 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 3553 return LHS; 3554 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 3555 return RHS; 3556 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 3557 ArrayType::ArraySizeModifier(), 0); 3558 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 3559 ArrayType::ArraySizeModifier(), 0); 3560 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 3561 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 3562 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 3563 return LHS; 3564 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 3565 return RHS; 3566 if (LVAT) { 3567 // FIXME: This isn't correct! But tricky to implement because 3568 // the array's size has to be the size of LHS, but the type 3569 // has to be different. 3570 return LHS; 3571 } 3572 if (RVAT) { 3573 // FIXME: This isn't correct! But tricky to implement because 3574 // the array's size has to be the size of RHS, but the type 3575 // has to be different. 3576 return RHS; 3577 } 3578 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 3579 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 3580 return getIncompleteArrayType(ResultType, 3581 ArrayType::ArraySizeModifier(), 0); 3582 } 3583 case Type::FunctionNoProto: 3584 return mergeFunctionTypes(LHS, RHS); 3585 case Type::Record: 3586 case Type::Enum: 3587 return QualType(); 3588 case Type::Builtin: 3589 // Only exactly equal builtin types are compatible, which is tested above. 3590 return QualType(); 3591 case Type::Complex: 3592 // Distinct complex types are incompatible. 3593 return QualType(); 3594 case Type::Vector: 3595 // FIXME: The merged type should be an ExtVector! 3596 if (areCompatVectorTypes(LHS->getAsVectorType(), RHS->getAsVectorType())) 3597 return LHS; 3598 return QualType(); 3599 case Type::ObjCInterface: { 3600 // Check if the interfaces are assignment compatible. 3601 // FIXME: This should be type compatibility, e.g. whether 3602 // "LHS x; RHS x;" at global scope is legal. 3603 const ObjCInterfaceType* LHSIface = LHS->getAsObjCInterfaceType(); 3604 const ObjCInterfaceType* RHSIface = RHS->getAsObjCInterfaceType(); 3605 if (LHSIface && RHSIface && 3606 canAssignObjCInterfaces(LHSIface, RHSIface)) 3607 return LHS; 3608 3609 return QualType(); 3610 } 3611 case Type::ObjCObjectPointer: { 3612 // FIXME: Incorporate tests from Sema::ObjCQualifiedIdTypesAreCompatible(). 3613 if (LHS->isObjCQualifiedIdType() && RHS->isObjCQualifiedIdType()) 3614 return QualType(); 3615 3616 if (canAssignObjCInterfaces(LHS->getAsObjCObjectPointerType(), 3617 RHS->getAsObjCObjectPointerType())) 3618 return LHS; 3619 3620 return QualType(); 3621 } 3622 case Type::FixedWidthInt: 3623 // Distinct fixed-width integers are not compatible. 3624 return QualType(); 3625 case Type::ExtQual: 3626 // FIXME: ExtQual types can be compatible even if they're not 3627 // identical! 3628 return QualType(); 3629 // First attempt at an implementation, but I'm not really sure it's 3630 // right... 3631#if 0 3632 ExtQualType* LQual = cast<ExtQualType>(LHSCan); 3633 ExtQualType* RQual = cast<ExtQualType>(RHSCan); 3634 if (LQual->getAddressSpace() != RQual->getAddressSpace() || 3635 LQual->getObjCGCAttr() != RQual->getObjCGCAttr()) 3636 return QualType(); 3637 QualType LHSBase, RHSBase, ResultType, ResCanUnqual; 3638 LHSBase = QualType(LQual->getBaseType(), 0); 3639 RHSBase = QualType(RQual->getBaseType(), 0); 3640 ResultType = mergeTypes(LHSBase, RHSBase); 3641 if (ResultType.isNull()) return QualType(); 3642 ResCanUnqual = getCanonicalType(ResultType).getUnqualifiedType(); 3643 if (LHSCan.getUnqualifiedType() == ResCanUnqual) 3644 return LHS; 3645 if (RHSCan.getUnqualifiedType() == ResCanUnqual) 3646 return RHS; 3647 ResultType = getAddrSpaceQualType(ResultType, LQual->getAddressSpace()); 3648 ResultType = getObjCGCQualType(ResultType, LQual->getObjCGCAttr()); 3649 ResultType.setCVRQualifiers(LHSCan.getCVRQualifiers()); 3650 return ResultType; 3651#endif 3652 3653 case Type::TemplateSpecialization: 3654 assert(false && "Dependent types have no size"); 3655 break; 3656 } 3657 3658 return QualType(); 3659} 3660 3661//===----------------------------------------------------------------------===// 3662// Integer Predicates 3663//===----------------------------------------------------------------------===// 3664 3665unsigned ASTContext::getIntWidth(QualType T) { 3666 if (T == BoolTy) 3667 return 1; 3668 if (FixedWidthIntType* FWIT = dyn_cast<FixedWidthIntType>(T)) { 3669 return FWIT->getWidth(); 3670 } 3671 // For builtin types, just use the standard type sizing method 3672 return (unsigned)getTypeSize(T); 3673} 3674 3675QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 3676 assert(T->isSignedIntegerType() && "Unexpected type"); 3677 if (const EnumType* ETy = T->getAsEnumType()) 3678 T = ETy->getDecl()->getIntegerType(); 3679 const BuiltinType* BTy = T->getAsBuiltinType(); 3680 assert (BTy && "Unexpected signed integer type"); 3681 switch (BTy->getKind()) { 3682 case BuiltinType::Char_S: 3683 case BuiltinType::SChar: 3684 return UnsignedCharTy; 3685 case BuiltinType::Short: 3686 return UnsignedShortTy; 3687 case BuiltinType::Int: 3688 return UnsignedIntTy; 3689 case BuiltinType::Long: 3690 return UnsignedLongTy; 3691 case BuiltinType::LongLong: 3692 return UnsignedLongLongTy; 3693 case BuiltinType::Int128: 3694 return UnsignedInt128Ty; 3695 default: 3696 assert(0 && "Unexpected signed integer type"); 3697 return QualType(); 3698 } 3699} 3700 3701ExternalASTSource::~ExternalASTSource() { } 3702 3703void ExternalASTSource::PrintStats() { } 3704 3705 3706//===----------------------------------------------------------------------===// 3707// Builtin Type Computation 3708//===----------------------------------------------------------------------===// 3709 3710/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 3711/// pointer over the consumed characters. This returns the resultant type. 3712static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 3713 ASTContext::GetBuiltinTypeError &Error, 3714 bool AllowTypeModifiers = true) { 3715 // Modifiers. 3716 int HowLong = 0; 3717 bool Signed = false, Unsigned = false; 3718 3719 // Read the modifiers first. 3720 bool Done = false; 3721 while (!Done) { 3722 switch (*Str++) { 3723 default: Done = true; --Str; break; 3724 case 'S': 3725 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 3726 assert(!Signed && "Can't use 'S' modifier multiple times!"); 3727 Signed = true; 3728 break; 3729 case 'U': 3730 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 3731 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 3732 Unsigned = true; 3733 break; 3734 case 'L': 3735 assert(HowLong <= 2 && "Can't have LLLL modifier"); 3736 ++HowLong; 3737 break; 3738 } 3739 } 3740 3741 QualType Type; 3742 3743 // Read the base type. 3744 switch (*Str++) { 3745 default: assert(0 && "Unknown builtin type letter!"); 3746 case 'v': 3747 assert(HowLong == 0 && !Signed && !Unsigned && 3748 "Bad modifiers used with 'v'!"); 3749 Type = Context.VoidTy; 3750 break; 3751 case 'f': 3752 assert(HowLong == 0 && !Signed && !Unsigned && 3753 "Bad modifiers used with 'f'!"); 3754 Type = Context.FloatTy; 3755 break; 3756 case 'd': 3757 assert(HowLong < 2 && !Signed && !Unsigned && 3758 "Bad modifiers used with 'd'!"); 3759 if (HowLong) 3760 Type = Context.LongDoubleTy; 3761 else 3762 Type = Context.DoubleTy; 3763 break; 3764 case 's': 3765 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 3766 if (Unsigned) 3767 Type = Context.UnsignedShortTy; 3768 else 3769 Type = Context.ShortTy; 3770 break; 3771 case 'i': 3772 if (HowLong == 3) 3773 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 3774 else if (HowLong == 2) 3775 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 3776 else if (HowLong == 1) 3777 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 3778 else 3779 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 3780 break; 3781 case 'c': 3782 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 3783 if (Signed) 3784 Type = Context.SignedCharTy; 3785 else if (Unsigned) 3786 Type = Context.UnsignedCharTy; 3787 else 3788 Type = Context.CharTy; 3789 break; 3790 case 'b': // boolean 3791 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 3792 Type = Context.BoolTy; 3793 break; 3794 case 'z': // size_t. 3795 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 3796 Type = Context.getSizeType(); 3797 break; 3798 case 'F': 3799 Type = Context.getCFConstantStringType(); 3800 break; 3801 case 'a': 3802 Type = Context.getBuiltinVaListType(); 3803 assert(!Type.isNull() && "builtin va list type not initialized!"); 3804 break; 3805 case 'A': 3806 // This is a "reference" to a va_list; however, what exactly 3807 // this means depends on how va_list is defined. There are two 3808 // different kinds of va_list: ones passed by value, and ones 3809 // passed by reference. An example of a by-value va_list is 3810 // x86, where va_list is a char*. An example of by-ref va_list 3811 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 3812 // we want this argument to be a char*&; for x86-64, we want 3813 // it to be a __va_list_tag*. 3814 Type = Context.getBuiltinVaListType(); 3815 assert(!Type.isNull() && "builtin va list type not initialized!"); 3816 if (Type->isArrayType()) { 3817 Type = Context.getArrayDecayedType(Type); 3818 } else { 3819 Type = Context.getLValueReferenceType(Type); 3820 } 3821 break; 3822 case 'V': { 3823 char *End; 3824 3825 unsigned NumElements = strtoul(Str, &End, 10); 3826 assert(End != Str && "Missing vector size"); 3827 3828 Str = End; 3829 3830 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 3831 Type = Context.getVectorType(ElementType, NumElements); 3832 break; 3833 } 3834 case 'P': { 3835 Type = Context.getFILEType(); 3836 if (Type.isNull()) { 3837 Error = ASTContext::GE_Missing_FILE; 3838 return QualType(); 3839 } else { 3840 break; 3841 } 3842 } 3843 } 3844 3845 if (!AllowTypeModifiers) 3846 return Type; 3847 3848 Done = false; 3849 while (!Done) { 3850 switch (*Str++) { 3851 default: Done = true; --Str; break; 3852 case '*': 3853 Type = Context.getPointerType(Type); 3854 break; 3855 case '&': 3856 Type = Context.getLValueReferenceType(Type); 3857 break; 3858 // FIXME: There's no way to have a built-in with an rvalue ref arg. 3859 case 'C': 3860 Type = Type.getQualifiedType(QualType::Const); 3861 break; 3862 } 3863 } 3864 3865 return Type; 3866} 3867 3868/// GetBuiltinType - Return the type for the specified builtin. 3869QualType ASTContext::GetBuiltinType(unsigned id, 3870 GetBuiltinTypeError &Error) { 3871 const char *TypeStr = BuiltinInfo.GetTypeString(id); 3872 3873 llvm::SmallVector<QualType, 8> ArgTypes; 3874 3875 Error = GE_None; 3876 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 3877 if (Error != GE_None) 3878 return QualType(); 3879 while (TypeStr[0] && TypeStr[0] != '.') { 3880 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 3881 if (Error != GE_None) 3882 return QualType(); 3883 3884 // Do array -> pointer decay. The builtin should use the decayed type. 3885 if (Ty->isArrayType()) 3886 Ty = getArrayDecayedType(Ty); 3887 3888 ArgTypes.push_back(Ty); 3889 } 3890 3891 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 3892 "'.' should only occur at end of builtin type list!"); 3893 3894 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 3895 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 3896 return getFunctionNoProtoType(ResType); 3897 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 3898 TypeStr[0] == '.', 0); 3899} 3900