ScopeInfo.h revision 04fa7a33279808dc3e5117c41b5f84c40eeb7362
1//===--- ScopeInfo.h - Information about a semantic context -----*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines FunctionScopeInfo and its subclasses, which contain 11// information about a single function, block, lambda, or method body. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SCOPE_INFO_H 16#define LLVM_CLANG_SEMA_SCOPE_INFO_H 17 18#include "clang/AST/Type.h" 19#include "clang/Basic/CapturedStmt.h" 20#include "clang/Basic/PartialDiagnostic.h" 21#include "llvm/ADT/DenseMap.h" 22#include "llvm/ADT/SmallVector.h" 23 24namespace clang { 25 26class Decl; 27class BlockDecl; 28class CapturedDecl; 29class CXXMethodDecl; 30class FieldDecl; 31class ObjCPropertyDecl; 32class IdentifierInfo; 33class ImplicitParamDecl; 34class LabelDecl; 35class ReturnStmt; 36class Scope; 37class SwitchStmt; 38class TemplateTypeParmDecl; 39class TemplateParameterList; 40class VarDecl; 41class DeclRefExpr; 42class ObjCIvarRefExpr; 43class ObjCPropertyRefExpr; 44class ObjCMessageExpr; 45 46namespace sema { 47 48/// \brief Contains information about the compound statement currently being 49/// parsed. 50class CompoundScopeInfo { 51public: 52 CompoundScopeInfo() 53 : HasEmptyLoopBodies(false) { } 54 55 /// \brief Whether this compound stamement contains `for' or `while' loops 56 /// with empty bodies. 57 bool HasEmptyLoopBodies; 58 59 void setHasEmptyLoopBodies() { 60 HasEmptyLoopBodies = true; 61 } 62}; 63 64class PossiblyUnreachableDiag { 65public: 66 PartialDiagnostic PD; 67 SourceLocation Loc; 68 const Stmt *stmt; 69 70 PossiblyUnreachableDiag(const PartialDiagnostic &PD, SourceLocation Loc, 71 const Stmt *stmt) 72 : PD(PD), Loc(Loc), stmt(stmt) {} 73}; 74 75/// \brief Retains information about a function, method, or block that is 76/// currently being parsed. 77class FunctionScopeInfo { 78protected: 79 enum ScopeKind { 80 SK_Function, 81 SK_Block, 82 SK_Lambda, 83 SK_CapturedRegion 84 }; 85 86public: 87 /// \brief What kind of scope we are describing. 88 /// 89 ScopeKind Kind; 90 91 /// \brief Whether this function contains a VLA, \@try, try, C++ 92 /// initializer, or anything else that can't be jumped past. 93 bool HasBranchProtectedScope; 94 95 /// \brief Whether this function contains any switches or direct gotos. 96 bool HasBranchIntoScope; 97 98 /// \brief Whether this function contains any indirect gotos. 99 bool HasIndirectGoto; 100 101 /// \brief Whether a statement was dropped because it was invalid. 102 bool HasDroppedStmt; 103 104 /// A flag that is set when parsing a method that must call super's 105 /// implementation, such as \c -dealloc, \c -finalize, or any method marked 106 /// with \c __attribute__((objc_requires_super)). 107 bool ObjCShouldCallSuper; 108 109 /// \brief Used to determine if errors occurred in this function or block. 110 DiagnosticErrorTrap ErrorTrap; 111 112 /// SwitchStack - This is the current set of active switch statements in the 113 /// block. 114 SmallVector<SwitchStmt*, 8> SwitchStack; 115 116 /// \brief The list of return statements that occur within the function or 117 /// block, if there is any chance of applying the named return value 118 /// optimization, or if we need to infer a return type. 119 SmallVector<ReturnStmt*, 4> Returns; 120 121 /// \brief The stack of currently active compound stamement scopes in the 122 /// function. 123 SmallVector<CompoundScopeInfo, 4> CompoundScopes; 124 125 /// \brief A list of PartialDiagnostics created but delayed within the 126 /// current function scope. These diagnostics are vetted for reachability 127 /// prior to being emitted. 128 SmallVector<PossiblyUnreachableDiag, 4> PossiblyUnreachableDiags; 129 130public: 131 /// Represents a simple identification of a weak object. 132 /// 133 /// Part of the implementation of -Wrepeated-use-of-weak. 134 /// 135 /// This is used to determine if two weak accesses refer to the same object. 136 /// Here are some examples of how various accesses are "profiled": 137 /// 138 /// Access Expression | "Base" Decl | "Property" Decl 139 /// :---------------: | :-----------------: | :------------------------------: 140 /// self.property | self (VarDecl) | property (ObjCPropertyDecl) 141 /// self.implicitProp | self (VarDecl) | -implicitProp (ObjCMethodDecl) 142 /// self->ivar.prop | ivar (ObjCIvarDecl) | prop (ObjCPropertyDecl) 143 /// cxxObj.obj.prop | obj (FieldDecl) | prop (ObjCPropertyDecl) 144 /// [self foo].prop | 0 (unknown) | prop (ObjCPropertyDecl) 145 /// self.prop1.prop2 | prop1 (ObjCPropertyDecl) | prop2 (ObjCPropertyDecl) 146 /// MyClass.prop | MyClass (ObjCInterfaceDecl) | -prop (ObjCMethodDecl) 147 /// weakVar | 0 (known) | weakVar (VarDecl) 148 /// self->weakIvar | self (VarDecl) | weakIvar (ObjCIvarDecl) 149 /// 150 /// Objects are identified with only two Decls to make it reasonably fast to 151 /// compare them. 152 class WeakObjectProfileTy { 153 /// The base object decl, as described in the class documentation. 154 /// 155 /// The extra flag is "true" if the Base and Property are enough to uniquely 156 /// identify the object in memory. 157 /// 158 /// \sa isExactProfile() 159 typedef llvm::PointerIntPair<const NamedDecl *, 1, bool> BaseInfoTy; 160 BaseInfoTy Base; 161 162 /// The "property" decl, as described in the class documentation. 163 /// 164 /// Note that this may not actually be an ObjCPropertyDecl, e.g. in the 165 /// case of "implicit" properties (regular methods accessed via dot syntax). 166 const NamedDecl *Property; 167 168 /// Used to find the proper base profile for a given base expression. 169 static BaseInfoTy getBaseInfo(const Expr *BaseE); 170 171 // For use in DenseMap. 172 friend class DenseMapInfo; 173 inline WeakObjectProfileTy(); 174 static inline WeakObjectProfileTy getSentinel(); 175 176 public: 177 WeakObjectProfileTy(const ObjCPropertyRefExpr *RE); 178 WeakObjectProfileTy(const Expr *Base, const ObjCPropertyDecl *Property); 179 WeakObjectProfileTy(const DeclRefExpr *RE); 180 WeakObjectProfileTy(const ObjCIvarRefExpr *RE); 181 182 const NamedDecl *getBase() const { return Base.getPointer(); } 183 const NamedDecl *getProperty() const { return Property; } 184 185 /// Returns true if the object base specifies a known object in memory, 186 /// rather than, say, an instance variable or property of another object. 187 /// 188 /// Note that this ignores the effects of aliasing; that is, \c foo.bar is 189 /// considered an exact profile if \c foo is a local variable, even if 190 /// another variable \c foo2 refers to the same object as \c foo. 191 /// 192 /// For increased precision, accesses with base variables that are 193 /// properties or ivars of 'self' (e.g. self.prop1.prop2) are considered to 194 /// be exact, though this is not true for arbitrary variables 195 /// (foo.prop1.prop2). 196 bool isExactProfile() const { 197 return Base.getInt(); 198 } 199 200 bool operator==(const WeakObjectProfileTy &Other) const { 201 return Base == Other.Base && Property == Other.Property; 202 } 203 204 // For use in DenseMap. 205 // We can't specialize the usual llvm::DenseMapInfo at the end of the file 206 // because by that point the DenseMap in FunctionScopeInfo has already been 207 // instantiated. 208 class DenseMapInfo { 209 public: 210 static inline WeakObjectProfileTy getEmptyKey() { 211 return WeakObjectProfileTy(); 212 } 213 static inline WeakObjectProfileTy getTombstoneKey() { 214 return WeakObjectProfileTy::getSentinel(); 215 } 216 217 static unsigned getHashValue(const WeakObjectProfileTy &Val) { 218 typedef std::pair<BaseInfoTy, const NamedDecl *> Pair; 219 return llvm::DenseMapInfo<Pair>::getHashValue(Pair(Val.Base, 220 Val.Property)); 221 } 222 223 static bool isEqual(const WeakObjectProfileTy &LHS, 224 const WeakObjectProfileTy &RHS) { 225 return LHS == RHS; 226 } 227 }; 228 }; 229 230 /// Represents a single use of a weak object. 231 /// 232 /// Stores both the expression and whether the access is potentially unsafe 233 /// (i.e. it could potentially be warned about). 234 /// 235 /// Part of the implementation of -Wrepeated-use-of-weak. 236 class WeakUseTy { 237 llvm::PointerIntPair<const Expr *, 1, bool> Rep; 238 public: 239 WeakUseTy(const Expr *Use, bool IsRead) : Rep(Use, IsRead) {} 240 241 const Expr *getUseExpr() const { return Rep.getPointer(); } 242 bool isUnsafe() const { return Rep.getInt(); } 243 void markSafe() { Rep.setInt(false); } 244 245 bool operator==(const WeakUseTy &Other) const { 246 return Rep == Other.Rep; 247 } 248 }; 249 250 /// Used to collect uses of a particular weak object in a function body. 251 /// 252 /// Part of the implementation of -Wrepeated-use-of-weak. 253 typedef SmallVector<WeakUseTy, 4> WeakUseVector; 254 255 /// Used to collect all uses of weak objects in a function body. 256 /// 257 /// Part of the implementation of -Wrepeated-use-of-weak. 258 typedef llvm::SmallDenseMap<WeakObjectProfileTy, WeakUseVector, 8, 259 WeakObjectProfileTy::DenseMapInfo> 260 WeakObjectUseMap; 261 262private: 263 /// Used to collect all uses of weak objects in this function body. 264 /// 265 /// Part of the implementation of -Wrepeated-use-of-weak. 266 WeakObjectUseMap WeakObjectUses; 267 268public: 269 /// Record that a weak object was accessed. 270 /// 271 /// Part of the implementation of -Wrepeated-use-of-weak. 272 template <typename ExprT> 273 inline void recordUseOfWeak(const ExprT *E, bool IsRead = true); 274 275 void recordUseOfWeak(const ObjCMessageExpr *Msg, 276 const ObjCPropertyDecl *Prop); 277 278 /// Record that a given expression is a "safe" access of a weak object (e.g. 279 /// assigning it to a strong variable.) 280 /// 281 /// Part of the implementation of -Wrepeated-use-of-weak. 282 void markSafeWeakUse(const Expr *E); 283 284 const WeakObjectUseMap &getWeakObjectUses() const { 285 return WeakObjectUses; 286 } 287 288 void setHasBranchIntoScope() { 289 HasBranchIntoScope = true; 290 } 291 292 void setHasBranchProtectedScope() { 293 HasBranchProtectedScope = true; 294 } 295 296 void setHasIndirectGoto() { 297 HasIndirectGoto = true; 298 } 299 300 void setHasDroppedStmt() { 301 HasDroppedStmt = true; 302 } 303 304 bool NeedsScopeChecking() const { 305 return !HasDroppedStmt && 306 (HasIndirectGoto || 307 (HasBranchProtectedScope && HasBranchIntoScope)); 308 } 309 310 FunctionScopeInfo(DiagnosticsEngine &Diag) 311 : Kind(SK_Function), 312 HasBranchProtectedScope(false), 313 HasBranchIntoScope(false), 314 HasIndirectGoto(false), 315 HasDroppedStmt(false), 316 ObjCShouldCallSuper(false), 317 ErrorTrap(Diag) { } 318 319 virtual ~FunctionScopeInfo(); 320 321 /// \brief Clear out the information in this function scope, making it 322 /// suitable for reuse. 323 void Clear(); 324}; 325 326class CapturingScopeInfo : public FunctionScopeInfo { 327public: 328 enum ImplicitCaptureStyle { 329 ImpCap_None, ImpCap_LambdaByval, ImpCap_LambdaByref, ImpCap_Block, 330 ImpCap_CapturedRegion 331 }; 332 333 ImplicitCaptureStyle ImpCaptureStyle; 334 335 class Capture { 336 // There are three categories of capture: capturing 'this', capturing 337 // local variables, and C++1y initialized captures (which can have an 338 // arbitrary initializer, and don't really capture in the traditional 339 // sense at all). 340 // 341 // There are three ways to capture a local variable: 342 // - capture by copy in the C++11 sense, 343 // - capture by reference in the C++11 sense, and 344 // - __block capture. 345 // Lambdas explicitly specify capture by copy or capture by reference. 346 // For blocks, __block capture applies to variables with that annotation, 347 // variables of reference type are captured by reference, and other 348 // variables are captured by copy. 349 enum CaptureKind { 350 Cap_ByCopy, Cap_ByRef, Cap_Block, Cap_This 351 }; 352 353 /// The variable being captured (if we are not capturing 'this') and whether 354 /// this is a nested capture. 355 llvm::PointerIntPair<VarDecl*, 1, bool> VarAndNested; 356 357 /// Expression to initialize a field of the given type, and the kind of 358 /// capture (if this is a capture and not an init-capture). The expression 359 /// is only required if we are capturing ByVal and the variable's type has 360 /// a non-trivial copy constructor. 361 llvm::PointerIntPair<Expr*, 2, CaptureKind> InitExprAndCaptureKind; 362 363 /// \brief The source location at which the first capture occurred. 364 SourceLocation Loc; 365 366 /// \brief The location of the ellipsis that expands a parameter pack. 367 SourceLocation EllipsisLoc; 368 369 /// \brief The type as it was captured, which is in effect the type of the 370 /// non-static data member that would hold the capture. 371 QualType CaptureType; 372 373 public: 374 Capture(VarDecl *Var, bool Block, bool ByRef, bool IsNested, 375 SourceLocation Loc, SourceLocation EllipsisLoc, 376 QualType CaptureType, Expr *Cpy) 377 : VarAndNested(Var, IsNested), 378 InitExprAndCaptureKind(Cpy, Block ? Cap_Block : 379 ByRef ? Cap_ByRef : Cap_ByCopy), 380 Loc(Loc), EllipsisLoc(EllipsisLoc), CaptureType(CaptureType) {} 381 382 enum IsThisCapture { ThisCapture }; 383 Capture(IsThisCapture, bool IsNested, SourceLocation Loc, 384 QualType CaptureType, Expr *Cpy) 385 : VarAndNested(0, IsNested), 386 InitExprAndCaptureKind(Cpy, Cap_This), 387 Loc(Loc), EllipsisLoc(), CaptureType(CaptureType) {} 388 389 bool isThisCapture() const { 390 return InitExprAndCaptureKind.getInt() == Cap_This; 391 } 392 bool isVariableCapture() const { 393 return InitExprAndCaptureKind.getInt() != Cap_This; 394 } 395 bool isCopyCapture() const { 396 return InitExprAndCaptureKind.getInt() == Cap_ByCopy; 397 } 398 bool isReferenceCapture() const { 399 return InitExprAndCaptureKind.getInt() == Cap_ByRef; 400 } 401 bool isBlockCapture() const { 402 return InitExprAndCaptureKind.getInt() == Cap_Block; 403 } 404 bool isNested() { return VarAndNested.getInt(); } 405 406 VarDecl *getVariable() const { 407 return VarAndNested.getPointer(); 408 } 409 410 /// \brief Retrieve the location at which this variable was captured. 411 SourceLocation getLocation() const { return Loc; } 412 413 /// \brief Retrieve the source location of the ellipsis, whose presence 414 /// indicates that the capture is a pack expansion. 415 SourceLocation getEllipsisLoc() const { return EllipsisLoc; } 416 417 /// \brief Retrieve the capture type for this capture, which is effectively 418 /// the type of the non-static data member in the lambda/block structure 419 /// that would store this capture. 420 QualType getCaptureType() const { return CaptureType; } 421 422 Expr *getInitExpr() const { 423 return InitExprAndCaptureKind.getPointer(); 424 } 425 }; 426 427 CapturingScopeInfo(DiagnosticsEngine &Diag, ImplicitCaptureStyle Style) 428 : FunctionScopeInfo(Diag), ImpCaptureStyle(Style), CXXThisCaptureIndex(0), 429 HasImplicitReturnType(false) 430 {} 431 432 /// CaptureMap - A map of captured variables to (index+1) into Captures. 433 llvm::DenseMap<VarDecl*, unsigned> CaptureMap; 434 435 /// CXXThisCaptureIndex - The (index+1) of the capture of 'this'; 436 /// zero if 'this' is not captured. 437 unsigned CXXThisCaptureIndex; 438 439 /// Captures - The captures. 440 SmallVector<Capture, 4> Captures; 441 442 /// \brief - Whether the target type of return statements in this context 443 /// is deduced (e.g. a lambda or block with omitted return type). 444 bool HasImplicitReturnType; 445 446 /// ReturnType - The target type of return statements in this context, 447 /// or null if unknown. 448 QualType ReturnType; 449 450 void addCapture(VarDecl *Var, bool isBlock, bool isByref, bool isNested, 451 SourceLocation Loc, SourceLocation EllipsisLoc, 452 QualType CaptureType, Expr *Cpy) { 453 Captures.push_back(Capture(Var, isBlock, isByref, isNested, Loc, 454 EllipsisLoc, CaptureType, Cpy)); 455 CaptureMap[Var] = Captures.size(); 456 } 457 458 void addThisCapture(bool isNested, SourceLocation Loc, QualType CaptureType, 459 Expr *Cpy); 460 461 /// \brief Determine whether the C++ 'this' is captured. 462 bool isCXXThisCaptured() const { return CXXThisCaptureIndex != 0; } 463 464 /// \brief Retrieve the capture of C++ 'this', if it has been captured. 465 Capture &getCXXThisCapture() { 466 assert(isCXXThisCaptured() && "this has not been captured"); 467 return Captures[CXXThisCaptureIndex - 1]; 468 } 469 470 /// \brief Determine whether the given variable has been captured. 471 bool isCaptured(VarDecl *Var) const { 472 return CaptureMap.count(Var); 473 } 474 475 /// \brief Retrieve the capture of the given variable, if it has been 476 /// captured already. 477 Capture &getCapture(VarDecl *Var) { 478 assert(isCaptured(Var) && "Variable has not been captured"); 479 return Captures[CaptureMap[Var] - 1]; 480 } 481 482 const Capture &getCapture(VarDecl *Var) const { 483 llvm::DenseMap<VarDecl*, unsigned>::const_iterator Known 484 = CaptureMap.find(Var); 485 assert(Known != CaptureMap.end() && "Variable has not been captured"); 486 return Captures[Known->second - 1]; 487 } 488 489 static bool classof(const FunctionScopeInfo *FSI) { 490 return FSI->Kind == SK_Block || FSI->Kind == SK_Lambda 491 || FSI->Kind == SK_CapturedRegion; 492 } 493}; 494 495/// \brief Retains information about a block that is currently being parsed. 496class BlockScopeInfo : public CapturingScopeInfo { 497public: 498 BlockDecl *TheDecl; 499 500 /// TheScope - This is the scope for the block itself, which contains 501 /// arguments etc. 502 Scope *TheScope; 503 504 /// BlockType - The function type of the block, if one was given. 505 /// Its return type may be BuiltinType::Dependent. 506 QualType FunctionType; 507 508 BlockScopeInfo(DiagnosticsEngine &Diag, Scope *BlockScope, BlockDecl *Block) 509 : CapturingScopeInfo(Diag, ImpCap_Block), TheDecl(Block), 510 TheScope(BlockScope) 511 { 512 Kind = SK_Block; 513 } 514 515 virtual ~BlockScopeInfo(); 516 517 static bool classof(const FunctionScopeInfo *FSI) { 518 return FSI->Kind == SK_Block; 519 } 520}; 521 522/// \brief Retains information about a captured region. 523class CapturedRegionScopeInfo: public CapturingScopeInfo { 524public: 525 /// \brief The CapturedDecl for this statement. 526 CapturedDecl *TheCapturedDecl; 527 /// \brief The captured record type. 528 RecordDecl *TheRecordDecl; 529 /// \brief This is the enclosing scope of the captured region. 530 Scope *TheScope; 531 /// \brief The implicit parameter for the captured variables. 532 ImplicitParamDecl *ContextParam; 533 /// \brief The kind of captured region. 534 CapturedRegionKind CapRegionKind; 535 536 CapturedRegionScopeInfo(DiagnosticsEngine &Diag, Scope *S, CapturedDecl *CD, 537 RecordDecl *RD, ImplicitParamDecl *Context, 538 CapturedRegionKind K) 539 : CapturingScopeInfo(Diag, ImpCap_CapturedRegion), 540 TheCapturedDecl(CD), TheRecordDecl(RD), TheScope(S), 541 ContextParam(Context), CapRegionKind(K) 542 { 543 Kind = SK_CapturedRegion; 544 } 545 546 virtual ~CapturedRegionScopeInfo(); 547 548 /// \brief A descriptive name for the kind of captured region this is. 549 StringRef getRegionName() const { 550 switch (CapRegionKind) { 551 case CR_Default: 552 return "default captured statement"; 553 case CR_OpenMP: 554 return "OpenMP region"; 555 } 556 llvm_unreachable("Invalid captured region kind!"); 557 } 558 559 static bool classof(const FunctionScopeInfo *FSI) { 560 return FSI->Kind == SK_CapturedRegion; 561 } 562}; 563 564class LambdaScopeInfo : public CapturingScopeInfo { 565public: 566 /// \brief The class that describes the lambda. 567 CXXRecordDecl *Lambda; 568 569 /// \brief The lambda's compiler-generated \c operator(). 570 CXXMethodDecl *CallOperator; 571 572 /// \brief Source range covering the lambda introducer [...]. 573 SourceRange IntroducerRange; 574 575 /// \brief Source location of the '&' or '=' specifying the default capture 576 /// type, if any. 577 SourceLocation CaptureDefaultLoc; 578 579 /// \brief The number of captures in the \c Captures list that are 580 /// explicit captures. 581 unsigned NumExplicitCaptures; 582 583 /// \brief Whether this is a mutable lambda. 584 bool Mutable; 585 586 /// \brief Whether the (empty) parameter list is explicit. 587 bool ExplicitParams; 588 589 /// \brief Whether any of the capture expressions requires cleanups. 590 bool ExprNeedsCleanups; 591 592 /// \brief Whether the lambda contains an unexpanded parameter pack. 593 bool ContainsUnexpandedParameterPack; 594 595 /// \brief Variables used to index into by-copy array captures. 596 SmallVector<VarDecl *, 4> ArrayIndexVars; 597 598 /// \brief Offsets into the ArrayIndexVars array at which each capture starts 599 /// its list of array index variables. 600 SmallVector<unsigned, 4> ArrayIndexStarts; 601 602 /// \brief If this is a generic lambda, use this as the depth of 603 /// each 'auto' parameter, during initial AST construction. 604 unsigned AutoTemplateParameterDepth; 605 606 /// \brief Store the list of the auto parameters for a generic lambda. 607 /// If this is a generic lambda, store the list of the auto 608 /// parameters converted into TemplateTypeParmDecls into a vector 609 /// that can be used to construct the generic lambda's template 610 /// parameter list, during initial AST construction. 611 SmallVector<TemplateTypeParmDecl*, 4> AutoTemplateParams; 612 613 /// If this is a generic lambda, and the template parameter 614 /// list has been created (from the AutoTemplateParams) then 615 /// store a reference to it (cache it to avoid reconstructing it). 616 TemplateParameterList *GLTemplateParameterList; 617 618 LambdaScopeInfo(DiagnosticsEngine &Diag) 619 : CapturingScopeInfo(Diag, ImpCap_None), Lambda(0), 620 CallOperator(0), NumExplicitCaptures(0), Mutable(false), 621 ExprNeedsCleanups(false), ContainsUnexpandedParameterPack(false), 622 AutoTemplateParameterDepth(0), 623 GLTemplateParameterList(0) 624 { 625 Kind = SK_Lambda; 626 } 627 628 virtual ~LambdaScopeInfo(); 629 630 /// \brief Note when all explicit captures have been added. 631 void finishedExplicitCaptures() { 632 NumExplicitCaptures = Captures.size(); 633 } 634 635 static bool classof(const FunctionScopeInfo *FSI) { 636 return FSI->Kind == SK_Lambda; 637 } 638}; 639 640 641FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy() 642 : Base(0, false), Property(0) {} 643 644FunctionScopeInfo::WeakObjectProfileTy 645FunctionScopeInfo::WeakObjectProfileTy::getSentinel() { 646 FunctionScopeInfo::WeakObjectProfileTy Result; 647 Result.Base.setInt(true); 648 return Result; 649} 650 651template <typename ExprT> 652void FunctionScopeInfo::recordUseOfWeak(const ExprT *E, bool IsRead) { 653 assert(E); 654 WeakUseVector &Uses = WeakObjectUses[WeakObjectProfileTy(E)]; 655 Uses.push_back(WeakUseTy(E, IsRead)); 656} 657 658inline void 659CapturingScopeInfo::addThisCapture(bool isNested, SourceLocation Loc, 660 QualType CaptureType, Expr *Cpy) { 661 Captures.push_back(Capture(Capture::ThisCapture, isNested, Loc, CaptureType, 662 Cpy)); 663 CXXThisCaptureIndex = Captures.size(); 664 665 if (LambdaScopeInfo *LSI = dyn_cast<LambdaScopeInfo>(this)) 666 LSI->ArrayIndexStarts.push_back(LSI->ArrayIndexVars.size()); 667} 668 669} // end namespace sema 670} // end namespace clang 671 672#endif 673