ScopeInfo.h revision a55d32d1b8f799bf58c02540983976368c42d895
1781472fe99a120098c631b0cbe33c89f8cef5e70John McCall//===--- ScopeInfo.h - Information about a semantic context -----*- C++ -*-===// 2781472fe99a120098c631b0cbe33c89f8cef5e70John McCall// 3781472fe99a120098c631b0cbe33c89f8cef5e70John McCall// The LLVM Compiler Infrastructure 4781472fe99a120098c631b0cbe33c89f8cef5e70John McCall// 5781472fe99a120098c631b0cbe33c89f8cef5e70John McCall// This file is distributed under the University of Illinois Open Source 6781472fe99a120098c631b0cbe33c89f8cef5e70John McCall// License. See LICENSE.TXT for details. 7781472fe99a120098c631b0cbe33c89f8cef5e70John McCall// 8781472fe99a120098c631b0cbe33c89f8cef5e70John McCall//===----------------------------------------------------------------------===// 9781472fe99a120098c631b0cbe33c89f8cef5e70John McCall// 10a55d32d1b8f799bf58c02540983976368c42d895Jordan Rose// This file defines FunctionScopeInfo and its subclasses, which contain 11a55d32d1b8f799bf58c02540983976368c42d895Jordan Rose// information about a single function, block, lambda, or method body. 12781472fe99a120098c631b0cbe33c89f8cef5e70John McCall// 13781472fe99a120098c631b0cbe33c89f8cef5e70John McCall//===----------------------------------------------------------------------===// 14781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 15781472fe99a120098c631b0cbe33c89f8cef5e70John McCall#ifndef LLVM_CLANG_SEMA_SCOPE_INFO_H 16781472fe99a120098c631b0cbe33c89f8cef5e70John McCall#define LLVM_CLANG_SEMA_SCOPE_INFO_H 17781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 18781472fe99a120098c631b0cbe33c89f8cef5e70John McCall#include "clang/AST/Type.h" 19351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek#include "clang/Basic/PartialDiagnostic.h" 20781472fe99a120098c631b0cbe33c89f8cef5e70John McCall#include "llvm/ADT/DenseMap.h" 21781472fe99a120098c631b0cbe33c89f8cef5e70John McCall#include "llvm/ADT/SmallVector.h" 22781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 23781472fe99a120098c631b0cbe33c89f8cef5e70John McCallnamespace clang { 24781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 2558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Roseclass Decl; 26781472fe99a120098c631b0cbe33c89f8cef5e70John McCallclass BlockDecl; 27f8af98286022f72157d84951b48fde5fb369ab29Douglas Gregorclass CXXMethodDecl; 28781472fe99a120098c631b0cbe33c89f8cef5e70John McCallclass IdentifierInfo; 29ad8dcf4a9df0e24051dc31bf9e6f3cd138a34298Chris Lattnerclass LabelDecl; 30781472fe99a120098c631b0cbe33c89f8cef5e70John McCallclass ReturnStmt; 31781472fe99a120098c631b0cbe33c89f8cef5e70John McCallclass Scope; 32781472fe99a120098c631b0cbe33c89f8cef5e70John McCallclass SwitchStmt; 33f8af98286022f72157d84951b48fde5fb369ab29Douglas Gregorclass VarDecl; 347a2704800943fbb69207e125d28186278712af36Jordan Roseclass DeclRefExpr; 357a2704800943fbb69207e125d28186278712af36Jordan Roseclass ObjCIvarRefExpr; 3658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Roseclass ObjCPropertyRefExpr; 37781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 38781472fe99a120098c631b0cbe33c89f8cef5e70John McCallnamespace sema { 39781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 40625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko/// \brief Contains information about the compound statement currently being 41625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko/// parsed. 42625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenkoclass CompoundScopeInfo { 43625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenkopublic: 44625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko CompoundScopeInfo() 45625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko : HasEmptyLoopBodies(false) { } 46625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 47625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko /// \brief Whether this compound stamement contains `for' or `while' loops 48625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko /// with empty bodies. 49625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko bool HasEmptyLoopBodies; 50625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 51625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko void setHasEmptyLoopBodies() { 52625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko HasEmptyLoopBodies = true; 53625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko } 54625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko}; 55625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 56351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenekclass PossiblyUnreachableDiag { 57351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenekpublic: 58351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek PartialDiagnostic PD; 59351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek SourceLocation Loc; 60351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek const Stmt *stmt; 61351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek 62351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek PossiblyUnreachableDiag(const PartialDiagnostic &PD, SourceLocation Loc, 63351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek const Stmt *stmt) 64351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek : PD(PD), Loc(Loc), stmt(stmt) {} 65351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek}; 66351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek 67781472fe99a120098c631b0cbe33c89f8cef5e70John McCall/// \brief Retains information about a function, method, or block that is 68781472fe99a120098c631b0cbe33c89f8cef5e70John McCall/// currently being parsed. 69781472fe99a120098c631b0cbe33c89f8cef5e70John McCallclass FunctionScopeInfo { 70ec9ea7200718478e8a976529defbe21942a11c9cEli Friedmanprotected: 71ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman enum ScopeKind { 72ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman SK_Function, 73ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman SK_Block, 74ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman SK_Lambda 75ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman }; 76ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman 77781472fe99a120098c631b0cbe33c89f8cef5e70John McCallpublic: 78ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman /// \brief What kind of scope we are describing. 79ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman /// 80ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman ScopeKind Kind; 81781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 82809d1be9820039b4cf6efa48246a0d70ffa13394James Dennett /// \brief Whether this function contains a VLA, \@try, try, C++ 83781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// initializer, or anything else that can't be jumped past. 84781472fe99a120098c631b0cbe33c89f8cef5e70John McCall bool HasBranchProtectedScope; 85781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 86781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// \brief Whether this function contains any switches or direct gotos. 87781472fe99a120098c631b0cbe33c89f8cef5e70John McCall bool HasBranchIntoScope; 88781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 89781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// \brief Whether this function contains any indirect gotos. 90781472fe99a120098c631b0cbe33c89f8cef5e70John McCall bool HasIndirectGoto; 91781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 9295aac15936e8362aeb4813f95bc255dee6473592Eli Friedman /// A flag that is set when parsing a -dealloc method and no [super dealloc] 9395aac15936e8362aeb4813f95bc255dee6473592Eli Friedman /// call was found yet. 9495aac15936e8362aeb4813f95bc255dee6473592Eli Friedman bool ObjCShouldCallSuperDealloc; 9595aac15936e8362aeb4813f95bc255dee6473592Eli Friedman 9695aac15936e8362aeb4813f95bc255dee6473592Eli Friedman /// A flag that is set when parsing a -finalize method and no [super finalize] 9795aac15936e8362aeb4813f95bc255dee6473592Eli Friedman /// call was found yet. 9895aac15936e8362aeb4813f95bc255dee6473592Eli Friedman bool ObjCShouldCallSuperFinalize; 9995aac15936e8362aeb4813f95bc255dee6473592Eli Friedman 1008fc32d272bd57b0a59f61c874cb7b56d9005e89eArgyrios Kyrtzidis /// \brief Used to determine if errors occurred in this function or block. 1018fc32d272bd57b0a59f61c874cb7b56d9005e89eArgyrios Kyrtzidis DiagnosticErrorTrap ErrorTrap; 102781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 103781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// SwitchStack - This is the current set of active switch statements in the 104781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// block. 105686775deca8b8685eb90801495880e3abdd844c2Chris Lattner SmallVector<SwitchStmt*, 8> SwitchStack; 106781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 107781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// \brief The list of return statements that occur within the function or 108781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// block, if there is any chance of applying the named return value 1097dd900ed308506f9cf1cb72c70db1652f94cab37Jordan Rose /// optimization, or if we need to infer a return type. 110686775deca8b8685eb90801495880e3abdd844c2Chris Lattner SmallVector<ReturnStmt*, 4> Returns; 111625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 112625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko /// \brief The stack of currently active compound stamement scopes in the 113625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko /// function. 114625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko SmallVector<CompoundScopeInfo, 4> CompoundScopes; 115625bb569df0c34feec0d52c0ec5215f21ef2e054Dmitri Gribenko 116351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek /// \brief A list of PartialDiagnostics created but delayed within the 117351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek /// current function scope. These diagnostics are vetted for reachability 118351ba91eaa6d30e523587b2d7ed676a5172c6e56Ted Kremenek /// prior to being emitted. 119686775deca8b8685eb90801495880e3abdd844c2Chris Lattner SmallVector<PossiblyUnreachableDiag, 4> PossiblyUnreachableDiags; 120781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 12158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rosepublic: 12258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Represents a simple identification of a weak object. 12358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 12458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Part of the implementation of -Wrepeated-use-of-weak. 12558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 12658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// This is used to determine if two weak accesses refer to the same object. 12758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Here are some examples of how various accesses are "profiled": 12858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 12958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Access Expression | "Base" Decl | "Property" Decl 13058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// :---------------: | :-----------------: | :------------------------------: 13158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// self.property | self (VarDecl) | property (ObjCPropertyDecl) 13258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// self.implicitProp | self (VarDecl) | -implicitProp (ObjCMethodDecl) 13358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// self->ivar.prop | ivar (ObjCIvarDecl) | prop (ObjCPropertyDecl) 13458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// cxxObj.obj.prop | obj (FieldDecl) | prop (ObjCPropertyDecl) 13558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// [self foo].prop | 0 (unknown) | prop (ObjCPropertyDecl) 13658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// self.prop1.prop2 | prop1 (ObjCPropertyDecl) | prop2 (ObjCPropertyDecl) 13758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// MyClass.prop | MyClass (ObjCInterfaceDecl) | -prop (ObjCMethodDecl) 1387a2704800943fbb69207e125d28186278712af36Jordan Rose /// weakVar | 0 (known) | weakVar (VarDecl) 1397a2704800943fbb69207e125d28186278712af36Jordan Rose /// self->weakIvar | self (VarDecl) | weakIvar (ObjCIvarDecl) 14058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 14158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Objects are identified with only two Decls to make it reasonably fast to 14258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// compare them. 14358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose class WeakObjectProfileTy { 14458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// The base object decl, as described in the class documentation. 14558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 14658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// The extra flag is "true" if the Base and Property are enough to uniquely 14758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// identify the object in memory. 14858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 14958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// \sa isExactProfile() 15058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose typedef llvm::PointerIntPair<const NamedDecl *, 1, bool> BaseInfoTy; 15158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose BaseInfoTy Base; 15258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 15358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// The "property" decl, as described in the class documentation. 15458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 15558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Note that this may not actually be an ObjCPropertyDecl, e.g. in the 15658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// case of "implicit" properties (regular methods accessed via dot syntax). 15758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose const NamedDecl *Property; 15858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 1597a2704800943fbb69207e125d28186278712af36Jordan Rose /// Used to find the proper base profile for a given base expression. 1607a2704800943fbb69207e125d28186278712af36Jordan Rose static BaseInfoTy getBaseInfo(const Expr *BaseE); 1617a2704800943fbb69207e125d28186278712af36Jordan Rose 16258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose // For use in DenseMap. 16358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose friend struct llvm::DenseMapInfo<WeakObjectProfileTy>; 16458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose inline WeakObjectProfileTy(); 16558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose static inline WeakObjectProfileTy getSentinel(); 16658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 16758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose public: 16858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose WeakObjectProfileTy(const ObjCPropertyRefExpr *RE); 1697a2704800943fbb69207e125d28186278712af36Jordan Rose WeakObjectProfileTy(const DeclRefExpr *RE); 1707a2704800943fbb69207e125d28186278712af36Jordan Rose WeakObjectProfileTy(const ObjCIvarRefExpr *RE); 17158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 17258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose const NamedDecl *getProperty() const { return Property; } 17358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 17458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Returns true if the object base specifies a known object in memory, 17558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// rather than, say, an instance variable or property of another object. 17658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 17758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Note that this ignores the effects of aliasing; that is, \c foo.bar is 17858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// considered an exact profile if \c foo is a local variable, even if 17958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// another variable \c foo2 refers to the same object as \c foo. 18058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 18158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// For increased precision, accesses with base variables that are 18258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// properties or ivars of 'self' (e.g. self.prop1.prop2) are considered to 18358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// be exact, though this is not true for arbitrary variables 18458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// (foo.prop1.prop2). 18558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose bool isExactProfile() const { 18658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose return Base.getInt(); 18758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose } 18858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 18958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose bool operator==(const WeakObjectProfileTy &Other) const { 19058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose return Base == Other.Base && Property == Other.Property; 19158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose } 19258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose }; 19358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 19458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Represents a single use of a weak object. 19558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 19658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Stores both the expression and whether the access is potentially unsafe 19758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// (i.e. it could potentially be warned about). 19858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 19958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Part of the implementation of -Wrepeated-use-of-weak. 20058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose class WeakUseTy { 20158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose llvm::PointerIntPair<const Expr *, 1, bool> Rep; 20258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose public: 20358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose WeakUseTy(const Expr *Use, bool IsRead) : Rep(Use, IsRead) {} 20458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 20558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose const Expr *getUseExpr() const { return Rep.getPointer(); } 20658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose bool isUnsafe() const { return Rep.getInt(); } 20758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose void markSafe() { Rep.setInt(false); } 20858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 20958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose bool operator==(const WeakUseTy &Other) const { 21058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose return Rep == Other.Rep; 21158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose } 21258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose }; 21358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 21458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Used to collect uses of a particular weak object in a function body. 21558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 21658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Part of the implementation of -Wrepeated-use-of-weak. 21758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose typedef SmallVector<WeakUseTy, 4> WeakUseVector; 21858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 21958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Used to collect all uses of weak objects in a function body. 22058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 22158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Part of the implementation of -Wrepeated-use-of-weak. 22258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose typedef llvm::SmallDenseMap<WeakObjectProfileTy, WeakUseVector, 8> 22358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose WeakObjectUseMap; 22458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 22558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Roseprivate: 22658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Used to collect all uses of weak objects in this function body. 22758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 22858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Part of the implementation of -Wrepeated-use-of-weak. 22958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose WeakObjectUseMap WeakObjectUses; 23058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 23158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rosepublic: 2327a2704800943fbb69207e125d28186278712af36Jordan Rose /// Record that a weak object was accessed. 23358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 23458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Part of the implementation of -Wrepeated-use-of-weak. 2357a2704800943fbb69207e125d28186278712af36Jordan Rose template <typename ExprT> 2367a2704800943fbb69207e125d28186278712af36Jordan Rose inline void recordUseOfWeak(const ExprT *E, bool IsRead = true); 23758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 23858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Record that a given expression is a "safe" access of a weak object (e.g. 23958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// assigning it to a strong variable.) 24058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// 24158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose /// Part of the implementation of -Wrepeated-use-of-weak. 24258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose void markSafeWeakUse(const Expr *E); 24358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 24458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose const WeakObjectUseMap &getWeakObjectUses() const { 24558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose return WeakObjectUses; 24658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose } 24758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 248781472fe99a120098c631b0cbe33c89f8cef5e70John McCall void setHasBranchIntoScope() { 249781472fe99a120098c631b0cbe33c89f8cef5e70John McCall HasBranchIntoScope = true; 250781472fe99a120098c631b0cbe33c89f8cef5e70John McCall } 251781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 252781472fe99a120098c631b0cbe33c89f8cef5e70John McCall void setHasBranchProtectedScope() { 253781472fe99a120098c631b0cbe33c89f8cef5e70John McCall HasBranchProtectedScope = true; 254781472fe99a120098c631b0cbe33c89f8cef5e70John McCall } 255781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 256781472fe99a120098c631b0cbe33c89f8cef5e70John McCall void setHasIndirectGoto() { 257781472fe99a120098c631b0cbe33c89f8cef5e70John McCall HasIndirectGoto = true; 258781472fe99a120098c631b0cbe33c89f8cef5e70John McCall } 259781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 260781472fe99a120098c631b0cbe33c89f8cef5e70John McCall bool NeedsScopeChecking() const { 261781472fe99a120098c631b0cbe33c89f8cef5e70John McCall return HasIndirectGoto || 262781472fe99a120098c631b0cbe33c89f8cef5e70John McCall (HasBranchProtectedScope && HasBranchIntoScope); 263781472fe99a120098c631b0cbe33c89f8cef5e70John McCall } 264781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 265d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie FunctionScopeInfo(DiagnosticsEngine &Diag) 266ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman : Kind(SK_Function), 267781472fe99a120098c631b0cbe33c89f8cef5e70John McCall HasBranchProtectedScope(false), 268781472fe99a120098c631b0cbe33c89f8cef5e70John McCall HasBranchIntoScope(false), 269781472fe99a120098c631b0cbe33c89f8cef5e70John McCall HasIndirectGoto(false), 27095aac15936e8362aeb4813f95bc255dee6473592Eli Friedman ObjCShouldCallSuperDealloc(false), 27195aac15936e8362aeb4813f95bc255dee6473592Eli Friedman ObjCShouldCallSuperFinalize(false), 2728fc32d272bd57b0a59f61c874cb7b56d9005e89eArgyrios Kyrtzidis ErrorTrap(Diag) { } 273781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 274781472fe99a120098c631b0cbe33c89f8cef5e70John McCall virtual ~FunctionScopeInfo(); 275781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 276781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// \brief Clear out the information in this function scope, making it 277781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// suitable for reuse. 2788fc32d272bd57b0a59f61c874cb7b56d9005e89eArgyrios Kyrtzidis void Clear(); 279781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 280781472fe99a120098c631b0cbe33c89f8cef5e70John McCall static bool classof(const FunctionScopeInfo *FSI) { return true; } 281781472fe99a120098c631b0cbe33c89f8cef5e70John McCall}; 282781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 283b69b42c55d56815bab62991bf839cdb41634d3afEli Friedmanclass CapturingScopeInfo : public FunctionScopeInfo { 284b69b42c55d56815bab62991bf839cdb41634d3afEli Friedmanpublic: 285b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman enum ImplicitCaptureStyle { 286b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman ImpCap_None, ImpCap_LambdaByval, ImpCap_LambdaByref, ImpCap_Block 287b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman }; 288b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 289b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman ImplicitCaptureStyle ImpCaptureStyle; 290b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 291b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman class Capture { 292b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman // There are two categories of capture: capturing 'this', and capturing 293b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman // local variables. There are three ways to capture a local variable: 294b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman // capture by copy in the C++11 sense, capture by reference 295b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman // in the C++11 sense, and __block capture. Lambdas explicitly specify 296b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman // capture by copy or capture by reference. For blocks, __block capture 297b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman // applies to variables with that annotation, variables of reference type 298b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman // are captured by reference, and other variables are captured by copy. 299b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman enum CaptureKind { 300b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman Cap_This, Cap_ByCopy, Cap_ByRef, Cap_Block 301b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman }; 302b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 303b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman // The variable being captured (if we are not capturing 'this'), 304b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman // and misc bits descibing the capture. 305b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman llvm::PointerIntPair<VarDecl*, 2, CaptureKind> VarAndKind; 306b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 307b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman // Expression to initialize a field of the given type, and whether this 308b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman // is a nested capture; the expression is only required if we are 309b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman // capturing ByVal and the variable's type has a non-trivial 310b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman // copy constructor. 311b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman llvm::PointerIntPair<Expr*, 1, bool> CopyExprAndNested; 312b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 31393962e5360a43200faa70939571afc4fb9326cf7Douglas Gregor /// \brief The source location at which the first capture occurred.. 31493962e5360a43200faa70939571afc4fb9326cf7Douglas Gregor SourceLocation Loc; 31593962e5360a43200faa70939571afc4fb9326cf7Douglas Gregor 316a73652465bcc4c0f6cb7d933ad84e002b527a643Douglas Gregor /// \brief The location of the ellipsis that expands a parameter pack. 317a73652465bcc4c0f6cb7d933ad84e002b527a643Douglas Gregor SourceLocation EllipsisLoc; 318a73652465bcc4c0f6cb7d933ad84e002b527a643Douglas Gregor 319999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor /// \brief The type as it was captured, which is in effect the type of the 320999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor /// non-static data member that would hold the capture. 321999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor QualType CaptureType; 322999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor 323b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman public: 324b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman Capture(VarDecl *Var, bool block, bool byRef, bool isNested, 325999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor SourceLocation Loc, SourceLocation EllipsisLoc, 326999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor QualType CaptureType, Expr *Cpy) 327b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman : VarAndKind(Var, block ? Cap_Block : byRef ? Cap_ByRef : Cap_ByCopy), 328999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor CopyExprAndNested(Cpy, isNested), Loc(Loc), EllipsisLoc(EllipsisLoc), 329999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor CaptureType(CaptureType){} 330b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 331b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman enum IsThisCapture { ThisCapture }; 332999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor Capture(IsThisCapture, bool isNested, SourceLocation Loc, 333999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor QualType CaptureType, Expr *Cpy) 334a73652465bcc4c0f6cb7d933ad84e002b527a643Douglas Gregor : VarAndKind(0, Cap_This), CopyExprAndNested(Cpy, isNested), Loc(Loc), 335999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor EllipsisLoc(), CaptureType(CaptureType) { } 336b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 337b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman bool isThisCapture() const { return VarAndKind.getInt() == Cap_This; } 338b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman bool isVariableCapture() const { return !isThisCapture(); } 339b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman bool isCopyCapture() const { return VarAndKind.getInt() == Cap_ByCopy; } 340b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman bool isReferenceCapture() const { return VarAndKind.getInt() == Cap_ByRef; } 341b942cb24a060435b18fef5b43eb33d77afc0d03aEli Friedman bool isBlockCapture() const { return VarAndKind.getInt() == Cap_Block; } 342b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman bool isNested() { return CopyExprAndNested.getInt(); } 343b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 344b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman VarDecl *getVariable() const { 345b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman return VarAndKind.getPointer(); 346b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman } 34793962e5360a43200faa70939571afc4fb9326cf7Douglas Gregor 34893962e5360a43200faa70939571afc4fb9326cf7Douglas Gregor /// \brief Retrieve the location at which this variable was captured. 34993962e5360a43200faa70939571afc4fb9326cf7Douglas Gregor SourceLocation getLocation() const { return Loc; } 35093962e5360a43200faa70939571afc4fb9326cf7Douglas Gregor 351a73652465bcc4c0f6cb7d933ad84e002b527a643Douglas Gregor /// \brief Retrieve the source location of the ellipsis, whose presence 352a73652465bcc4c0f6cb7d933ad84e002b527a643Douglas Gregor /// indicates that the capture is a pack expansion. 353a73652465bcc4c0f6cb7d933ad84e002b527a643Douglas Gregor SourceLocation getEllipsisLoc() const { return EllipsisLoc; } 354a73652465bcc4c0f6cb7d933ad84e002b527a643Douglas Gregor 355999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor /// \brief Retrieve the capture type for this capture, which is effectively 356999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor /// the type of the non-static data member in the lambda/block structure 357999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor /// that would store this capture. 358999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor QualType getCaptureType() const { return CaptureType; } 359999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor 360b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman Expr *getCopyExpr() const { 361b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman return CopyExprAndNested.getPointer(); 362b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman } 363b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman }; 364b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 365b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman CapturingScopeInfo(DiagnosticsEngine &Diag, ImplicitCaptureStyle Style) 36684b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman : FunctionScopeInfo(Diag), ImpCaptureStyle(Style), CXXThisCaptureIndex(0), 36784b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman HasImplicitReturnType(false) 368b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman {} 369b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 370b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman /// CaptureMap - A map of captured variables to (index+1) into Captures. 371b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman llvm::DenseMap<VarDecl*, unsigned> CaptureMap; 372b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 373b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman /// CXXThisCaptureIndex - The (index+1) of the capture of 'this'; 374b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman /// zero if 'this' is not captured. 375b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman unsigned CXXThisCaptureIndex; 376b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 377b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman /// Captures - The captures. 378b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman SmallVector<Capture, 4> Captures; 379b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 38084b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman /// \brief - Whether the target type of return statements in this context 38184b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman /// is deduced (e.g. a lambda or block with omitted return type). 38284b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman bool HasImplicitReturnType; 38384b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman 38484b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman /// ReturnType - The target type of return statements in this context, 38584b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman /// or null if unknown. 38684b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman QualType ReturnType; 38784b007fae6c0cd30fa07074d34fbe2bf61fa44f9Eli Friedman 388999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor void addCapture(VarDecl *Var, bool isBlock, bool isByref, bool isNested, 389999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor SourceLocation Loc, SourceLocation EllipsisLoc, 390999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor QualType CaptureType, Expr *Cpy) { 391a73652465bcc4c0f6cb7d933ad84e002b527a643Douglas Gregor Captures.push_back(Capture(Var, isBlock, isByref, isNested, Loc, 392999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor EllipsisLoc, CaptureType, Cpy)); 393b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman CaptureMap[Var] = Captures.size(); 394b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman } 395b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 396999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor void addThisCapture(bool isNested, SourceLocation Loc, QualType CaptureType, 397999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor Expr *Cpy) { 398999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor Captures.push_back(Capture(Capture::ThisCapture, isNested, Loc, CaptureType, 399999713eea940f4e087cc3ac878689c5c5c7a7225Douglas Gregor Cpy)); 400b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman CXXThisCaptureIndex = Captures.size(); 401b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman } 402b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 403a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor /// \brief Determine whether the C++ 'this' is captured. 404a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor bool isCXXThisCaptured() const { return CXXThisCaptureIndex != 0; } 405a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor 406a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor /// \brief Retrieve the capture of C++ 'this', if it has been captured. 407a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor Capture &getCXXThisCapture() { 408a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor assert(isCXXThisCaptured() && "this has not been captured"); 409a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor return Captures[CXXThisCaptureIndex - 1]; 410a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor } 411a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor 412a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor /// \brief Determine whether the given variable has been captured. 413a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor bool isCaptured(VarDecl *Var) const { 414b11a7fd2f2204c7aadd74f870c98667d461997f5Aaron Ballman return CaptureMap.count(Var); 415a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor } 416a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor 417a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor /// \brief Retrieve the capture of the given variable, if it has been 418a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor /// captured already. 419a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor Capture &getCapture(VarDecl *Var) { 420a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor assert(isCaptured(Var) && "Variable has not been captured"); 421a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor return Captures[CaptureMap[Var] - 1]; 422a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor } 423a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor 424a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor const Capture &getCapture(VarDecl *Var) const { 425a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor llvm::DenseMap<VarDecl*, unsigned>::const_iterator Known 426a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor = CaptureMap.find(Var); 427a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor assert(Known != CaptureMap.end() && "Variable has not been captured"); 428a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor return Captures[Known->second - 1]; 429a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor } 430a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor 431b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman static bool classof(const FunctionScopeInfo *FSI) { 432b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman return FSI->Kind == SK_Block || FSI->Kind == SK_Lambda; 433b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman } 434b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman static bool classof(const CapturingScopeInfo *BSI) { return true; } 435b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman}; 436b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 437781472fe99a120098c631b0cbe33c89f8cef5e70John McCall/// \brief Retains information about a block that is currently being parsed. 438b69b42c55d56815bab62991bf839cdb41634d3afEli Friedmanclass BlockScopeInfo : public CapturingScopeInfo { 439781472fe99a120098c631b0cbe33c89f8cef5e70John McCallpublic: 440781472fe99a120098c631b0cbe33c89f8cef5e70John McCall BlockDecl *TheDecl; 441781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 442781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// TheScope - This is the scope for the block itself, which contains 443781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// arguments etc. 444781472fe99a120098c631b0cbe33c89f8cef5e70John McCall Scope *TheScope; 445781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 446781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// BlockType - The function type of the block, if one was given. 447781472fe99a120098c631b0cbe33c89f8cef5e70John McCall /// Its return type may be BuiltinType::Dependent. 448781472fe99a120098c631b0cbe33c89f8cef5e70John McCall QualType FunctionType; 449781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 450d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie BlockScopeInfo(DiagnosticsEngine &Diag, Scope *BlockScope, BlockDecl *Block) 451b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman : CapturingScopeInfo(Diag, ImpCap_Block), TheDecl(Block), 452b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman TheScope(BlockScope) 453781472fe99a120098c631b0cbe33c89f8cef5e70John McCall { 454ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman Kind = SK_Block; 455781472fe99a120098c631b0cbe33c89f8cef5e70John McCall } 456781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 457781472fe99a120098c631b0cbe33c89f8cef5e70John McCall virtual ~BlockScopeInfo(); 458781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 459ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman static bool classof(const FunctionScopeInfo *FSI) { 460ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman return FSI->Kind == SK_Block; 461ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman } 462781472fe99a120098c631b0cbe33c89f8cef5e70John McCall static bool classof(const BlockScopeInfo *BSI) { return true; } 463781472fe99a120098c631b0cbe33c89f8cef5e70John McCall}; 464781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 465b69b42c55d56815bab62991bf839cdb41634d3afEli Friedmanclass LambdaScopeInfo : public CapturingScopeInfo { 466ec9ea7200718478e8a976529defbe21942a11c9cEli Friedmanpublic: 467ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman /// \brief The class that describes the lambda. 468ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman CXXRecordDecl *Lambda; 46901d08018b7cf5ce1601707cfd7a84d22015fc04eDouglas Gregor 47076e3da57b0e8cf72d221f44d54566ef206341668Douglas Gregor /// \brief The class that describes the lambda. 47176e3da57b0e8cf72d221f44d54566ef206341668Douglas Gregor CXXMethodDecl *CallOperator; 47276e3da57b0e8cf72d221f44d54566ef206341668Douglas Gregor 47301d08018b7cf5ce1601707cfd7a84d22015fc04eDouglas Gregor /// \brief Source range covering the lambda introducer [...]. 47401d08018b7cf5ce1601707cfd7a84d22015fc04eDouglas Gregor SourceRange IntroducerRange; 47501d08018b7cf5ce1601707cfd7a84d22015fc04eDouglas Gregor 476ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman /// \brief The number of captures in the \c Captures list that are 477ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman /// explicit captures. 478ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman unsigned NumExplicitCaptures; 47972899c34e3d1abfffa241ad0ce5c4bf175e5ea51Eli Friedman 480503384f731b5abcbf870b0a5224eb920e631db0aDouglas Gregor /// \brief Whether this is a mutable lambda. 481d67d0cc40f31956b40b44b6ee3619d17a0f73294Eli Friedman bool Mutable; 48201d08018b7cf5ce1601707cfd7a84d22015fc04eDouglas Gregor 48301d08018b7cf5ce1601707cfd7a84d22015fc04eDouglas Gregor /// \brief Whether the (empty) parameter list is explicit. 48401d08018b7cf5ce1601707cfd7a84d22015fc04eDouglas Gregor bool ExplicitParams; 485d67d0cc40f31956b40b44b6ee3619d17a0f73294Eli Friedman 486503384f731b5abcbf870b0a5224eb920e631db0aDouglas Gregor /// \brief Whether any of the capture expressions requires cleanups. 487503384f731b5abcbf870b0a5224eb920e631db0aDouglas Gregor bool ExprNeedsCleanups; 488503384f731b5abcbf870b0a5224eb920e631db0aDouglas Gregor 489612409ece080e814f79e06772c690d603f45fbd6Richard Smith /// \brief Whether the lambda contains an unexpanded parameter pack. 490612409ece080e814f79e06772c690d603f45fbd6Richard Smith bool ContainsUnexpandedParameterPack; 491612409ece080e814f79e06772c690d603f45fbd6Richard Smith 4929daa7bfdff7256cef693d7bf10084881bcb9253cDouglas Gregor /// \brief Variables used to index into by-copy array captures. 4939daa7bfdff7256cef693d7bf10084881bcb9253cDouglas Gregor llvm::SmallVector<VarDecl *, 4> ArrayIndexVars; 4949daa7bfdff7256cef693d7bf10084881bcb9253cDouglas Gregor 4959daa7bfdff7256cef693d7bf10084881bcb9253cDouglas Gregor /// \brief Offsets into the ArrayIndexVars array at which each capture starts 4969daa7bfdff7256cef693d7bf10084881bcb9253cDouglas Gregor /// its list of array index variables. 4979daa7bfdff7256cef693d7bf10084881bcb9253cDouglas Gregor llvm::SmallVector<unsigned, 4> ArrayIndexStarts; 4989daa7bfdff7256cef693d7bf10084881bcb9253cDouglas Gregor 49976e3da57b0e8cf72d221f44d54566ef206341668Douglas Gregor LambdaScopeInfo(DiagnosticsEngine &Diag, CXXRecordDecl *Lambda, 50076e3da57b0e8cf72d221f44d54566ef206341668Douglas Gregor CXXMethodDecl *CallOperator) 501b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman : CapturingScopeInfo(Diag, ImpCap_None), Lambda(Lambda), 502503384f731b5abcbf870b0a5224eb920e631db0aDouglas Gregor CallOperator(CallOperator), NumExplicitCaptures(0), Mutable(false), 503612409ece080e814f79e06772c690d603f45fbd6Richard Smith ExprNeedsCleanups(false), ContainsUnexpandedParameterPack(false) 504ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman { 505ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman Kind = SK_Lambda; 506ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman } 507b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 508ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman virtual ~LambdaScopeInfo(); 509b69b42c55d56815bab62991bf839cdb41634d3afEli Friedman 510a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor /// \brief Note when 511a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor void finishedExplicitCaptures() { 512a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor NumExplicitCaptures = Captures.size(); 513a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor } 514a1f2114d9e81923c750f6b439302ac03552c37dbDouglas Gregor 515ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman static bool classof(const FunctionScopeInfo *FSI) { 516ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman return FSI->Kind == SK_Lambda; 517ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman } 518ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman static bool classof(const LambdaScopeInfo *BSI) { return true; } 519ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman 520ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman}; 521ec9ea7200718478e8a976529defbe21942a11c9cEli Friedman 52258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan RoseFunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy() 52358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose : Base(0, false), Property(0) {} 52458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 52558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan RoseFunctionScopeInfo::WeakObjectProfileTy 52658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan RoseFunctionScopeInfo::WeakObjectProfileTy::getSentinel() { 52758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose FunctionScopeInfo::WeakObjectProfileTy Result; 52858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose Result.Base.setInt(true); 52958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose return Result; 53058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose} 53158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 5327a2704800943fbb69207e125d28186278712af36Jordan Rosetemplate <typename ExprT> 5337a2704800943fbb69207e125d28186278712af36Jordan Rosevoid FunctionScopeInfo::recordUseOfWeak(const ExprT *E, bool IsRead) { 5347a2704800943fbb69207e125d28186278712af36Jordan Rose assert(E); 5357a2704800943fbb69207e125d28186278712af36Jordan Rose WeakUseVector &Uses = WeakObjectUses[WeakObjectProfileTy(E)]; 5367a2704800943fbb69207e125d28186278712af36Jordan Rose Uses.push_back(WeakUseTy(E, IsRead)); 537781472fe99a120098c631b0cbe33c89f8cef5e70John McCall} 5387a2704800943fbb69207e125d28186278712af36Jordan Rose 5397a2704800943fbb69207e125d28186278712af36Jordan Rose} // end namespace sema 5407a2704800943fbb69207e125d28186278712af36Jordan Rose} // end namespace clang 541781472fe99a120098c631b0cbe33c89f8cef5e70John McCall 54258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rosenamespace llvm { 54358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose template <> 54458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose struct DenseMapInfo<clang::sema::FunctionScopeInfo::WeakObjectProfileTy> { 54558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose typedef clang::sema::FunctionScopeInfo::WeakObjectProfileTy ProfileTy; 54658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose static inline ProfileTy getEmptyKey() { 54758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose return ProfileTy(); 54858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose } 54958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose static inline ProfileTy getTombstoneKey() { 55058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose return ProfileTy::getSentinel(); 55158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose } 55258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 55358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose static unsigned getHashValue(const ProfileTy &Val) { 55458b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose typedef std::pair<ProfileTy::BaseInfoTy, const clang::NamedDecl *> Pair; 55558b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose return DenseMapInfo<Pair>::getHashValue(Pair(Val.Base, Val.Property)); 55658b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose } 55758b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 55858b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose static bool isEqual(const ProfileTy &LHS, const ProfileTy &RHS) { 55958b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose return LHS == RHS; 56058b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose } 56158b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose }; 56258b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose} // end namespace llvm 56358b6bdcdeb683a3504f2248a409e1f4e85876ceeJordan Rose 564781472fe99a120098c631b0cbe33c89f8cef5e70John McCall#endif 565