head 1.1; branch 1.1.1; access; symbols netbsd-11-0-RC4:1.1.1.10 netbsd-11-0-RC3:1.1.1.10 netbsd-11-0-RC2:1.1.1.10 netbsd-11-0-RC1:1.1.1.10 perseant-exfatfs-base-20250801:1.1.1.10 netbsd-11:1.1.1.10.0.10 netbsd-11-base:1.1.1.10 netbsd-10-1-RELEASE:1.1.1.10 perseant-exfatfs-base-20240630:1.1.1.10 perseant-exfatfs:1.1.1.10.0.8 perseant-exfatfs-base:1.1.1.10 netbsd-8-3-RELEASE:1.1.1.7 netbsd-9-4-RELEASE:1.1.1.9 netbsd-10-0-RELEASE:1.1.1.10 netbsd-10-0-RC6:1.1.1.10 netbsd-10-0-RC5:1.1.1.10 netbsd-10-0-RC4:1.1.1.10 netbsd-10-0-RC3:1.1.1.10 netbsd-10-0-RC2:1.1.1.10 netbsd-10-0-RC1:1.1.1.10 netbsd-10:1.1.1.10.0.6 netbsd-10-base:1.1.1.10 netbsd-9-3-RELEASE:1.1.1.9 cjep_sun2x:1.1.1.10.0.4 cjep_sun2x-base:1.1.1.10 cjep_staticlib_x-base1:1.1.1.10 netbsd-9-2-RELEASE:1.1.1.9 cjep_staticlib_x:1.1.1.10.0.2 cjep_staticlib_x-base:1.1.1.10 netbsd-9-1-RELEASE:1.1.1.9 phil-wifi-20200421:1.1.1.10 phil-wifi-20200411:1.1.1.10 phil-wifi-20200406:1.1.1.10 netbsd-8-2-RELEASE:1.1.1.7 netbsd-9-0-RELEASE:1.1.1.9 netbsd-9-0-RC2:1.1.1.9 netbsd-9-0-RC1:1.1.1.9 netbsd-9:1.1.1.9.0.2 netbsd-9-base:1.1.1.9 phil-wifi-20190609:1.1.1.9 netbsd-8-1-RELEASE:1.1.1.7 netbsd-8-1-RC1:1.1.1.7 pgoyette-compat-merge-20190127:1.1.1.8.2.1 pgoyette-compat-20190127:1.1.1.9 pgoyette-compat-20190118:1.1.1.9 pgoyette-compat-1226:1.1.1.9 pgoyette-compat-1126:1.1.1.9 pgoyette-compat-1020:1.1.1.9 pgoyette-compat-0930:1.1.1.9 pgoyette-compat-0906:1.1.1.9 netbsd-7-2-RELEASE:1.1.1.4.2.1 pgoyette-compat-0728:1.1.1.9 clang-337282:1.1.1.9 netbsd-8-0-RELEASE:1.1.1.7 phil-wifi:1.1.1.8.0.4 phil-wifi-base:1.1.1.8 pgoyette-compat-0625:1.1.1.8 netbsd-8-0-RC2:1.1.1.7 pgoyette-compat-0521:1.1.1.8 pgoyette-compat-0502:1.1.1.8 pgoyette-compat-0422:1.1.1.8 netbsd-8-0-RC1:1.1.1.7 pgoyette-compat-0415:1.1.1.8 pgoyette-compat-0407:1.1.1.8 pgoyette-compat-0330:1.1.1.8 pgoyette-compat-0322:1.1.1.8 pgoyette-compat-0315:1.1.1.8 netbsd-7-1-2-RELEASE:1.1.1.4.2.1 pgoyette-compat:1.1.1.8.0.2 pgoyette-compat-base:1.1.1.8 netbsd-7-1-1-RELEASE:1.1.1.4.2.1 clang-319952:1.1.1.8 matt-nb8-mediatek:1.1.1.7.0.10 matt-nb8-mediatek-base:1.1.1.7 clang-309604:1.1.1.8 perseant-stdc-iso10646:1.1.1.7.0.8 perseant-stdc-iso10646-base:1.1.1.7 netbsd-8:1.1.1.7.0.6 netbsd-8-base:1.1.1.7 prg-localcount2-base3:1.1.1.7 prg-localcount2-base2:1.1.1.7 prg-localcount2-base1:1.1.1.7 prg-localcount2:1.1.1.7.0.4 prg-localcount2-base:1.1.1.7 pgoyette-localcount-20170426:1.1.1.7 bouyer-socketcan-base1:1.1.1.7 pgoyette-localcount-20170320:1.1.1.7 netbsd-7-1:1.1.1.4.2.1.0.6 netbsd-7-1-RELEASE:1.1.1.4.2.1 netbsd-7-1-RC2:1.1.1.4.2.1 clang-294123:1.1.1.7 netbsd-7-nhusb-base-20170116:1.1.1.4.2.1 bouyer-socketcan:1.1.1.7.0.2 bouyer-socketcan-base:1.1.1.7 clang-291444:1.1.1.7 pgoyette-localcount-20170107:1.1.1.6 netbsd-7-1-RC1:1.1.1.4.2.1 pgoyette-localcount-20161104:1.1.1.6 netbsd-7-0-2-RELEASE:1.1.1.4.2.1 localcount-20160914:1.1.1.6 netbsd-7-nhusb:1.1.1.4.2.1.0.4 netbsd-7-nhusb-base:1.1.1.4.2.1 clang-280599:1.1.1.6 pgoyette-localcount-20160806:1.1.1.6 pgoyette-localcount-20160726:1.1.1.6 pgoyette-localcount:1.1.1.6.0.2 pgoyette-localcount-base:1.1.1.6 netbsd-7-0-1-RELEASE:1.1.1.4.2.1 clang-261930:1.1.1.6 netbsd-7-0:1.1.1.4.2.1.0.2 netbsd-7-0-RELEASE:1.1.1.4.2.1 netbsd-7-0-RC3:1.1.1.4.2.1 netbsd-7-0-RC2:1.1.1.4.2.1 netbsd-7-0-RC1:1.1.1.4.2.1 clang-237755:1.1.1.5 clang-232565:1.1.1.5 clang-227398:1.1.1.5 tls-maxphys-base:1.1.1.4 tls-maxphys:1.1.1.4.0.4 netbsd-7:1.1.1.4.0.2 netbsd-7-base:1.1.1.4 clang-215315:1.1.1.4 clang-209886:1.1.1.3 yamt-pagecache:1.1.1.2.0.4 yamt-pagecache-base9:1.1.1.2 tls-earlyentropy:1.1.1.2.0.2 tls-earlyentropy-base:1.1.1.3 riastradh-xf86-video-intel-2-7-1-pre-2-21-15:1.1.1.2 riastradh-drm2-base3:1.1.1.2 clang-202566:1.1.1.2 clang-201163:1.1.1.2 clang-199312:1.1.1.2 clang-198450:1.1.1.2 clang-196603:1.1.1.1 clang-195771:1.1.1.1 LLVM:1.1.1; locks; strict; comment @// @; 1.1 date 2013.11.28.14.14.50; author joerg; state Exp; branches 1.1.1.1; next ; commitid ow8OybrawrB1f3fx; 1.1.1.1 date 2013.11.28.14.14.50; author joerg; state Exp; branches; next 1.1.1.2; commitid ow8OybrawrB1f3fx; 1.1.1.2 date 2014.01.05.15.38.39; author joerg; state Exp; branches 1.1.1.2.2.1 1.1.1.2.4.1; next 1.1.1.3; commitid wh3aCSIWykURqWjx; 1.1.1.3 date 2014.05.30.18.14.42; author joerg; state Exp; branches; next 1.1.1.4; commitid 8q0kdlBlCn09GACx; 1.1.1.4 date 2014.08.10.17.08.28; author joerg; state Exp; branches 1.1.1.4.2.1 1.1.1.4.4.1; next 1.1.1.5; commitid N85tXAN6Ex9VZPLx; 1.1.1.5 date 2015.01.29.19.57.28; author joerg; state Exp; branches; next 1.1.1.6; commitid mlISSizlPKvepX7y; 1.1.1.6 date 2016.02.27.22.12.00; author joerg; state Exp; branches 1.1.1.6.2.1; next 1.1.1.7; commitid tIimz3oDlh1NpBWy; 1.1.1.7 date 2017.01.11.10.34.26; author joerg; state Exp; branches; next 1.1.1.8; commitid CNnUNfII1jgNmxBz; 1.1.1.8 date 2017.08.01.19.35.08; author joerg; state Exp; branches 1.1.1.8.2.1 1.1.1.8.4.1; next 1.1.1.9; commitid pMuDy65V0VicSx1A; 1.1.1.9 date 2018.07.17.18.31.16; author joerg; state Exp; branches; next 1.1.1.10; commitid wDzL46ALjrCZgwKA; 1.1.1.10 date 2019.11.13.22.19.26; author joerg; state dead; branches; next ; commitid QD8YATxuNG34YJKB; 1.1.1.2.2.1 date 2014.08.10.07.08.09; author tls; state Exp; branches; next ; commitid t01A1TLTYxkpGMLx; 1.1.1.2.4.1 date 2014.01.05.15.38.39; author yamt; state dead; branches; next 1.1.1.2.4.2; commitid WSrDtL5nYAUyiyBx; 1.1.1.2.4.2 date 2014.05.22.16.18.29; author yamt; state Exp; branches; next ; commitid WSrDtL5nYAUyiyBx; 1.1.1.4.2.1 date 2015.06.04.20.04.29; author snj; state Exp; branches; next ; commitid yRnjq9fueSo6n9oy; 1.1.1.4.4.1 date 2014.08.10.17.08.28; author tls; state dead; branches; next 1.1.1.4.4.2; commitid jTnpym9Qu0o4R1Nx; 1.1.1.4.4.2 date 2014.08.19.23.47.30; author tls; state Exp; branches; next ; commitid jTnpym9Qu0o4R1Nx; 1.1.1.6.2.1 date 2017.03.20.06.52.40; author pgoyette; state Exp; branches; next ; commitid jjw7cAwgyKq7RfKz; 1.1.1.8.2.1 date 2018.07.28.04.33.21; author pgoyette; state Exp; branches; next ; commitid 1UP1xAIUxv1ZgRLA; 1.1.1.8.4.1 date 2019.06.10.21.45.26; author christos; state Exp; branches; next 1.1.1.8.4.2; commitid jtc8rnCzWiEEHGqB; 1.1.1.8.4.2 date 2020.04.13.07.46.36; author martin; state dead; branches; next ; commitid X01YhRUPVUDaec4C; desc @@ 1.1 log @Initial revision @ text @//===--- ScopeInfo.cpp - Information about a semantic context -------------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file implements FunctionScopeInfo and its subclasses, which contain // information about a single function, block, lambda, or method body. // //===----------------------------------------------------------------------===// #include "clang/Sema/ScopeInfo.h" #include "clang/AST/Decl.h" #include "clang/AST/DeclObjC.h" #include "clang/AST/Expr.h" #include "clang/AST/ExprCXX.h" #include "clang/AST/ExprObjC.h" using namespace clang; using namespace sema; void FunctionScopeInfo::Clear() { HasBranchProtectedScope = false; HasBranchIntoScope = false; HasIndirectGoto = false; SwitchStack.clear(); Returns.clear(); ErrorTrap.reset(); PossiblyUnreachableDiags.clear(); WeakObjectUses.clear(); } static const NamedDecl *getBestPropertyDecl(const ObjCPropertyRefExpr *PropE) { if (PropE->isExplicitProperty()) return PropE->getExplicitProperty(); return PropE->getImplicitPropertyGetter(); } FunctionScopeInfo::WeakObjectProfileTy::BaseInfoTy FunctionScopeInfo::WeakObjectProfileTy::getBaseInfo(const Expr *E) { E = E->IgnoreParenCasts(); const NamedDecl *D = 0; bool IsExact = false; switch (E->getStmtClass()) { case Stmt::DeclRefExprClass: D = cast(E)->getDecl(); IsExact = isa(D); break; case Stmt::MemberExprClass: { const MemberExpr *ME = cast(E); D = ME->getMemberDecl(); IsExact = isa(ME->getBase()->IgnoreParenImpCasts()); break; } case Stmt::ObjCIvarRefExprClass: { const ObjCIvarRefExpr *IE = cast(E); D = IE->getDecl(); IsExact = IE->getBase()->isObjCSelfExpr(); break; } case Stmt::PseudoObjectExprClass: { const PseudoObjectExpr *POE = cast(E); const ObjCPropertyRefExpr *BaseProp = dyn_cast(POE->getSyntacticForm()); if (BaseProp) { D = getBestPropertyDecl(BaseProp); const Expr *DoubleBase = BaseProp->getBase(); if (const OpaqueValueExpr *OVE = dyn_cast(DoubleBase)) DoubleBase = OVE->getSourceExpr(); IsExact = DoubleBase->isObjCSelfExpr(); } break; } default: break; } return BaseInfoTy(D, IsExact); } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy( const ObjCPropertyRefExpr *PropE) : Base(0, true), Property(getBestPropertyDecl(PropE)) { if (PropE->isObjectReceiver()) { const OpaqueValueExpr *OVE = cast(PropE->getBase()); const Expr *E = OVE->getSourceExpr(); Base = getBaseInfo(E); } else if (PropE->isClassReceiver()) { Base.setPointer(PropE->getClassReceiver()); } else { assert(PropE->isSuperReceiver()); } } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy(const Expr *BaseE, const ObjCPropertyDecl *Prop) : Base(0, true), Property(Prop) { if (BaseE) Base = getBaseInfo(BaseE); // else, this is a message accessing a property on super. } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy( const DeclRefExpr *DRE) : Base(0, true), Property(DRE->getDecl()) { assert(isa(Property)); } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy( const ObjCIvarRefExpr *IvarE) : Base(getBaseInfo(IvarE->getBase())), Property(IvarE->getDecl()) { } void FunctionScopeInfo::recordUseOfWeak(const ObjCMessageExpr *Msg, const ObjCPropertyDecl *Prop) { assert(Msg && Prop); WeakUseVector &Uses = WeakObjectUses[WeakObjectProfileTy(Msg->getInstanceReceiver(), Prop)]; Uses.push_back(WeakUseTy(Msg, Msg->getNumArgs() == 0)); } void FunctionScopeInfo::markSafeWeakUse(const Expr *E) { E = E->IgnoreParenCasts(); if (const PseudoObjectExpr *POE = dyn_cast(E)) { markSafeWeakUse(POE->getSyntacticForm()); return; } if (const ConditionalOperator *Cond = dyn_cast(E)) { markSafeWeakUse(Cond->getTrueExpr()); markSafeWeakUse(Cond->getFalseExpr()); return; } if (const BinaryConditionalOperator *Cond = dyn_cast(E)) { markSafeWeakUse(Cond->getCommon()); markSafeWeakUse(Cond->getFalseExpr()); return; } // Has this weak object been seen before? FunctionScopeInfo::WeakObjectUseMap::iterator Uses; if (const ObjCPropertyRefExpr *RefExpr = dyn_cast(E)) Uses = WeakObjectUses.find(WeakObjectProfileTy(RefExpr)); else if (const ObjCIvarRefExpr *IvarE = dyn_cast(E)) Uses = WeakObjectUses.find(WeakObjectProfileTy(IvarE)); else if (const DeclRefExpr *DRE = dyn_cast(E)) Uses = WeakObjectUses.find(WeakObjectProfileTy(DRE)); else if (const ObjCMessageExpr *MsgE = dyn_cast(E)) { Uses = WeakObjectUses.end(); if (const ObjCMethodDecl *MD = MsgE->getMethodDecl()) { if (const ObjCPropertyDecl *Prop = MD->findPropertyDecl()) { Uses = WeakObjectUses.find(WeakObjectProfileTy(MsgE->getInstanceReceiver(), Prop)); } } } else return; if (Uses == WeakObjectUses.end()) return; // Has there been a read from the object using this Expr? FunctionScopeInfo::WeakUseVector::reverse_iterator ThisUse = std::find(Uses->second.rbegin(), Uses->second.rend(), WeakUseTy(E, true)); if (ThisUse == Uses->second.rend()) return; ThisUse->markSafe(); } void LambdaScopeInfo::getPotentialVariableCapture(unsigned Idx, VarDecl *&VD, Expr *&E) { assert(Idx < getNumPotentialVariableCaptures() && "Index of potential capture must be within 0 to less than the " "number of captures!"); E = PotentiallyCapturingExprs[Idx]; if (DeclRefExpr *DRE = dyn_cast(E)) VD = dyn_cast(DRE->getFoundDecl()); else if (MemberExpr *ME = dyn_cast(E)) VD = dyn_cast(ME->getMemberDecl()); else llvm_unreachable("Only DeclRefExprs or MemberExprs should be added for " "potential captures"); assert(VD); } FunctionScopeInfo::~FunctionScopeInfo() { } BlockScopeInfo::~BlockScopeInfo() { } LambdaScopeInfo::~LambdaScopeInfo() { } CapturedRegionScopeInfo::~CapturedRegionScopeInfo() { } @ 1.1.1.1 log @Import Clang 3.4rc1 r195771. @ text @@ 1.1.1.2 log @Import clang 3.5svn r198450. @ text @a28 6 HasDroppedStmt = false; ObjCShouldCallSuper = false; ObjCIsDesignatedInit = false; ObjCWarnForNoDesignatedInitChain = false; ObjCIsSecondaryInit = false; ObjCWarnForNoInitDelegation = false; d187 1 a187 2 void LambdaScopeInfo::getPotentialVariableCapture(unsigned Idx, VarDecl *&VD, Expr *&E) const { d189 2 a190 2 "Index of potential capture must be within 0 to less than the " "number of captures!"); @ 1.1.1.2.2.1 log @Rebase. @ text @d54 1 a54 1 const NamedDecl *D = nullptr; d96 1 d99 1 a99 1 : Base(nullptr, true), Property(getBestPropertyDecl(PropE)) { d114 1 a114 1 : Base(nullptr, true), Property(Prop) { d122 1 a122 1 : Base(nullptr, true), Property(DRE->getDecl()) { @ 1.1.1.3 log @Import Clang 3.5svn r209886. @ text @d54 1 a54 1 const NamedDecl *D = nullptr; d96 1 d99 1 a99 1 : Base(nullptr, true), Property(getBestPropertyDecl(PropE)) { d114 1 a114 1 : Base(nullptr, true), Property(Prop) { d122 1 a122 1 : Base(nullptr, true), Property(DRE->getDecl()) { @ 1.1.1.4 log @Import clang 3.6svn r215315. @ text @d161 2 a162 8 if (const ObjCPropertyRefExpr *RefExpr = dyn_cast(E)) { if (isa(RefExpr->getBase())) Uses = WeakObjectUses.find(WeakObjectProfileTy(RefExpr)); else { markSafeWeakUse(RefExpr->getBase()); return; } } @ 1.1.1.4.2.1 log @Update LLVM to 3.6.1, requested by joerg in ticket 824. @ text @a16 1 #include "clang/AST/DeclCXX.h" a40 1 ModifiedNonNullParams.clear(); a95 15 bool CapturingScopeInfo::isVLATypeCaptured(const VariableArrayType *VAT) const { RecordDecl *RD = nullptr; if (auto *LSI = dyn_cast(this)) RD = LSI->Lambda; else if (auto CRSI = dyn_cast(this)) RD = CRSI->TheRecordDecl; if (RD) for (auto *FD : RD->fields()) { if (FD->hasCapturedVLAType() && FD->getCapturedVLAType() == VAT) return true; } return false; } a161 2 if (!RefExpr->isObjectReceiver()) return; @ 1.1.1.5 log @Import Clang 3.6RC1 r227398. @ text @a16 1 #include "clang/AST/DeclCXX.h" a40 1 ModifiedNonNullParams.clear(); a95 15 bool CapturingScopeInfo::isVLATypeCaptured(const VariableArrayType *VAT) const { RecordDecl *RD = nullptr; if (auto *LSI = dyn_cast(this)) RD = LSI->Lambda; else if (auto CRSI = dyn_cast(this)) RD = CRSI->TheRecordDecl; if (RD) for (auto *FD : RD->fields()) { if (FD->hasCapturedVLAType() && FD->getCapturedVLAType() == VAT) return true; } return false; } a161 2 if (!RefExpr->isObjectReceiver()) return; @ 1.1.1.6 log @Import Clang 3.8.0rc3 r261930. @ text @a35 3 FirstReturnLoc = SourceLocation(); FirstCXXTryLoc = SourceLocation(); FirstSEHTryLoc = SourceLocation(); a38 2 CoroutinePromise = nullptr; CoroutineStmts.clear(); d235 1 @ 1.1.1.6.2.1 log @Sync with HEAD @ text @a30 3 HasOMPDeclareReductionCombiner = false; HasFallthroughStmt = false; HasPotentialAvailabilityViolations = false; d88 3 a90 4 if (BaseProp->isObjectReceiver()) { const Expr *DoubleBase = BaseProp->getBase(); if (const OpaqueValueExpr *OVE = dyn_cast(DoubleBase)) DoubleBase = OVE->getSourceExpr(); d92 1 a92 2 IsExact = DoubleBase->isObjCSelfExpr(); } d215 1 a215 1 llvm::find(llvm::reverse(Uses->second), WeakUseTy(E, true)); @ 1.1.1.7 log @Import Clang pre-4.0.0 r291444. @ text @a30 3 HasOMPDeclareReductionCombiner = false; HasFallthroughStmt = false; HasPotentialAvailabilityViolations = false; d88 3 a90 4 if (BaseProp->isObjectReceiver()) { const Expr *DoubleBase = BaseProp->getBase(); if (const OpaqueValueExpr *OVE = dyn_cast(DoubleBase)) DoubleBase = OVE->getSourceExpr(); d92 1 a92 2 IsExact = DoubleBase->isObjCSelfExpr(); } d215 1 a215 1 llvm::find(llvm::reverse(Uses->second), WeakUseTy(E, true)); @ 1.1.1.8 log @Import clang r309604 from branches/release_50 @ text @a42 7 // Coroutine state FirstCoroutineStmtLoc = SourceLocation(); CoroutinePromise = nullptr; NeedsCoroutineSuspends = true; CoroutineSuspends.first = nullptr; CoroutineSuspends.second = nullptr; d45 2 d187 1 a187 1 FunctionScopeInfo::WeakObjectUseMap::iterator Uses = WeakObjectUses.end(); d200 4 a203 4 else if (const DeclRefExpr *DRE = dyn_cast(E)) { if (isa(DRE->getDecl())) Uses = WeakObjectUses.find(WeakObjectProfileTy(DRE)); } else if (const ObjCMessageExpr *MsgE = dyn_cast(E)) { @ 1.1.1.8.4.1 log @Sync with HEAD @ text @a45 1 CoroutineParameterMoves.clear(); @ 1.1.1.8.4.2 log @Mostly merge changes from HEAD upto 20200411 @ text @@ 1.1.1.8.2.1 log @Sync with HEAD @ text @a45 1 CoroutineParameterMoves.clear(); @ 1.1.1.9 log @Import clang r337282 from trunk @ text @a45 1 CoroutineParameterMoves.clear(); @ 1.1.1.10 log @Mark old LLVM instance as dead. @ text @@ 1.1.1.4.4.1 log @file ScopeInfo.cpp was added on branch tls-maxphys on 2014-08-19 23:47:30 +0000 @ text @d1 217 @ 1.1.1.4.4.2 log @Rebase to HEAD as of a few days ago. @ text @a0 217 //===--- ScopeInfo.cpp - Information about a semantic context -------------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file implements FunctionScopeInfo and its subclasses, which contain // information about a single function, block, lambda, or method body. // //===----------------------------------------------------------------------===// #include "clang/Sema/ScopeInfo.h" #include "clang/AST/Decl.h" #include "clang/AST/DeclObjC.h" #include "clang/AST/Expr.h" #include "clang/AST/ExprCXX.h" #include "clang/AST/ExprObjC.h" using namespace clang; using namespace sema; void FunctionScopeInfo::Clear() { HasBranchProtectedScope = false; HasBranchIntoScope = false; HasIndirectGoto = false; HasDroppedStmt = false; ObjCShouldCallSuper = false; ObjCIsDesignatedInit = false; ObjCWarnForNoDesignatedInitChain = false; ObjCIsSecondaryInit = false; ObjCWarnForNoInitDelegation = false; SwitchStack.clear(); Returns.clear(); ErrorTrap.reset(); PossiblyUnreachableDiags.clear(); WeakObjectUses.clear(); } static const NamedDecl *getBestPropertyDecl(const ObjCPropertyRefExpr *PropE) { if (PropE->isExplicitProperty()) return PropE->getExplicitProperty(); return PropE->getImplicitPropertyGetter(); } FunctionScopeInfo::WeakObjectProfileTy::BaseInfoTy FunctionScopeInfo::WeakObjectProfileTy::getBaseInfo(const Expr *E) { E = E->IgnoreParenCasts(); const NamedDecl *D = nullptr; bool IsExact = false; switch (E->getStmtClass()) { case Stmt::DeclRefExprClass: D = cast(E)->getDecl(); IsExact = isa(D); break; case Stmt::MemberExprClass: { const MemberExpr *ME = cast(E); D = ME->getMemberDecl(); IsExact = isa(ME->getBase()->IgnoreParenImpCasts()); break; } case Stmt::ObjCIvarRefExprClass: { const ObjCIvarRefExpr *IE = cast(E); D = IE->getDecl(); IsExact = IE->getBase()->isObjCSelfExpr(); break; } case Stmt::PseudoObjectExprClass: { const PseudoObjectExpr *POE = cast(E); const ObjCPropertyRefExpr *BaseProp = dyn_cast(POE->getSyntacticForm()); if (BaseProp) { D = getBestPropertyDecl(BaseProp); const Expr *DoubleBase = BaseProp->getBase(); if (const OpaqueValueExpr *OVE = dyn_cast(DoubleBase)) DoubleBase = OVE->getSourceExpr(); IsExact = DoubleBase->isObjCSelfExpr(); } break; } default: break; } return BaseInfoTy(D, IsExact); } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy( const ObjCPropertyRefExpr *PropE) : Base(nullptr, true), Property(getBestPropertyDecl(PropE)) { if (PropE->isObjectReceiver()) { const OpaqueValueExpr *OVE = cast(PropE->getBase()); const Expr *E = OVE->getSourceExpr(); Base = getBaseInfo(E); } else if (PropE->isClassReceiver()) { Base.setPointer(PropE->getClassReceiver()); } else { assert(PropE->isSuperReceiver()); } } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy(const Expr *BaseE, const ObjCPropertyDecl *Prop) : Base(nullptr, true), Property(Prop) { if (BaseE) Base = getBaseInfo(BaseE); // else, this is a message accessing a property on super. } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy( const DeclRefExpr *DRE) : Base(nullptr, true), Property(DRE->getDecl()) { assert(isa(Property)); } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy( const ObjCIvarRefExpr *IvarE) : Base(getBaseInfo(IvarE->getBase())), Property(IvarE->getDecl()) { } void FunctionScopeInfo::recordUseOfWeak(const ObjCMessageExpr *Msg, const ObjCPropertyDecl *Prop) { assert(Msg && Prop); WeakUseVector &Uses = WeakObjectUses[WeakObjectProfileTy(Msg->getInstanceReceiver(), Prop)]; Uses.push_back(WeakUseTy(Msg, Msg->getNumArgs() == 0)); } void FunctionScopeInfo::markSafeWeakUse(const Expr *E) { E = E->IgnoreParenCasts(); if (const PseudoObjectExpr *POE = dyn_cast(E)) { markSafeWeakUse(POE->getSyntacticForm()); return; } if (const ConditionalOperator *Cond = dyn_cast(E)) { markSafeWeakUse(Cond->getTrueExpr()); markSafeWeakUse(Cond->getFalseExpr()); return; } if (const BinaryConditionalOperator *Cond = dyn_cast(E)) { markSafeWeakUse(Cond->getCommon()); markSafeWeakUse(Cond->getFalseExpr()); return; } // Has this weak object been seen before? FunctionScopeInfo::WeakObjectUseMap::iterator Uses; if (const ObjCPropertyRefExpr *RefExpr = dyn_cast(E)) { if (isa(RefExpr->getBase())) Uses = WeakObjectUses.find(WeakObjectProfileTy(RefExpr)); else { markSafeWeakUse(RefExpr->getBase()); return; } } else if (const ObjCIvarRefExpr *IvarE = dyn_cast(E)) Uses = WeakObjectUses.find(WeakObjectProfileTy(IvarE)); else if (const DeclRefExpr *DRE = dyn_cast(E)) Uses = WeakObjectUses.find(WeakObjectProfileTy(DRE)); else if (const ObjCMessageExpr *MsgE = dyn_cast(E)) { Uses = WeakObjectUses.end(); if (const ObjCMethodDecl *MD = MsgE->getMethodDecl()) { if (const ObjCPropertyDecl *Prop = MD->findPropertyDecl()) { Uses = WeakObjectUses.find(WeakObjectProfileTy(MsgE->getInstanceReceiver(), Prop)); } } } else return; if (Uses == WeakObjectUses.end()) return; // Has there been a read from the object using this Expr? FunctionScopeInfo::WeakUseVector::reverse_iterator ThisUse = std::find(Uses->second.rbegin(), Uses->second.rend(), WeakUseTy(E, true)); if (ThisUse == Uses->second.rend()) return; ThisUse->markSafe(); } void LambdaScopeInfo::getPotentialVariableCapture(unsigned Idx, VarDecl *&VD, Expr *&E) const { assert(Idx < getNumPotentialVariableCaptures() && "Index of potential capture must be within 0 to less than the " "number of captures!"); E = PotentiallyCapturingExprs[Idx]; if (DeclRefExpr *DRE = dyn_cast(E)) VD = dyn_cast(DRE->getFoundDecl()); else if (MemberExpr *ME = dyn_cast(E)) VD = dyn_cast(ME->getMemberDecl()); else llvm_unreachable("Only DeclRefExprs or MemberExprs should be added for " "potential captures"); assert(VD); } FunctionScopeInfo::~FunctionScopeInfo() { } BlockScopeInfo::~BlockScopeInfo() { } LambdaScopeInfo::~LambdaScopeInfo() { } CapturedRegionScopeInfo::~CapturedRegionScopeInfo() { } @ 1.1.1.2.4.1 log @file ScopeInfo.cpp was added on branch yamt-pagecache on 2014-05-22 16:18:29 +0000 @ text @d1 212 @ 1.1.1.2.4.2 log @sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments") @ text @a0 212 //===--- ScopeInfo.cpp - Information about a semantic context -------------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file implements FunctionScopeInfo and its subclasses, which contain // information about a single function, block, lambda, or method body. // //===----------------------------------------------------------------------===// #include "clang/Sema/ScopeInfo.h" #include "clang/AST/Decl.h" #include "clang/AST/DeclObjC.h" #include "clang/AST/Expr.h" #include "clang/AST/ExprCXX.h" #include "clang/AST/ExprObjC.h" using namespace clang; using namespace sema; void FunctionScopeInfo::Clear() { HasBranchProtectedScope = false; HasBranchIntoScope = false; HasIndirectGoto = false; HasDroppedStmt = false; ObjCShouldCallSuper = false; ObjCIsDesignatedInit = false; ObjCWarnForNoDesignatedInitChain = false; ObjCIsSecondaryInit = false; ObjCWarnForNoInitDelegation = false; SwitchStack.clear(); Returns.clear(); ErrorTrap.reset(); PossiblyUnreachableDiags.clear(); WeakObjectUses.clear(); } static const NamedDecl *getBestPropertyDecl(const ObjCPropertyRefExpr *PropE) { if (PropE->isExplicitProperty()) return PropE->getExplicitProperty(); return PropE->getImplicitPropertyGetter(); } FunctionScopeInfo::WeakObjectProfileTy::BaseInfoTy FunctionScopeInfo::WeakObjectProfileTy::getBaseInfo(const Expr *E) { E = E->IgnoreParenCasts(); const NamedDecl *D = 0; bool IsExact = false; switch (E->getStmtClass()) { case Stmt::DeclRefExprClass: D = cast(E)->getDecl(); IsExact = isa(D); break; case Stmt::MemberExprClass: { const MemberExpr *ME = cast(E); D = ME->getMemberDecl(); IsExact = isa(ME->getBase()->IgnoreParenImpCasts()); break; } case Stmt::ObjCIvarRefExprClass: { const ObjCIvarRefExpr *IE = cast(E); D = IE->getDecl(); IsExact = IE->getBase()->isObjCSelfExpr(); break; } case Stmt::PseudoObjectExprClass: { const PseudoObjectExpr *POE = cast(E); const ObjCPropertyRefExpr *BaseProp = dyn_cast(POE->getSyntacticForm()); if (BaseProp) { D = getBestPropertyDecl(BaseProp); const Expr *DoubleBase = BaseProp->getBase(); if (const OpaqueValueExpr *OVE = dyn_cast(DoubleBase)) DoubleBase = OVE->getSourceExpr(); IsExact = DoubleBase->isObjCSelfExpr(); } break; } default: break; } return BaseInfoTy(D, IsExact); } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy( const ObjCPropertyRefExpr *PropE) : Base(0, true), Property(getBestPropertyDecl(PropE)) { if (PropE->isObjectReceiver()) { const OpaqueValueExpr *OVE = cast(PropE->getBase()); const Expr *E = OVE->getSourceExpr(); Base = getBaseInfo(E); } else if (PropE->isClassReceiver()) { Base.setPointer(PropE->getClassReceiver()); } else { assert(PropE->isSuperReceiver()); } } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy(const Expr *BaseE, const ObjCPropertyDecl *Prop) : Base(0, true), Property(Prop) { if (BaseE) Base = getBaseInfo(BaseE); // else, this is a message accessing a property on super. } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy( const DeclRefExpr *DRE) : Base(0, true), Property(DRE->getDecl()) { assert(isa(Property)); } FunctionScopeInfo::WeakObjectProfileTy::WeakObjectProfileTy( const ObjCIvarRefExpr *IvarE) : Base(getBaseInfo(IvarE->getBase())), Property(IvarE->getDecl()) { } void FunctionScopeInfo::recordUseOfWeak(const ObjCMessageExpr *Msg, const ObjCPropertyDecl *Prop) { assert(Msg && Prop); WeakUseVector &Uses = WeakObjectUses[WeakObjectProfileTy(Msg->getInstanceReceiver(), Prop)]; Uses.push_back(WeakUseTy(Msg, Msg->getNumArgs() == 0)); } void FunctionScopeInfo::markSafeWeakUse(const Expr *E) { E = E->IgnoreParenCasts(); if (const PseudoObjectExpr *POE = dyn_cast(E)) { markSafeWeakUse(POE->getSyntacticForm()); return; } if (const ConditionalOperator *Cond = dyn_cast(E)) { markSafeWeakUse(Cond->getTrueExpr()); markSafeWeakUse(Cond->getFalseExpr()); return; } if (const BinaryConditionalOperator *Cond = dyn_cast(E)) { markSafeWeakUse(Cond->getCommon()); markSafeWeakUse(Cond->getFalseExpr()); return; } // Has this weak object been seen before? FunctionScopeInfo::WeakObjectUseMap::iterator Uses; if (const ObjCPropertyRefExpr *RefExpr = dyn_cast(E)) Uses = WeakObjectUses.find(WeakObjectProfileTy(RefExpr)); else if (const ObjCIvarRefExpr *IvarE = dyn_cast(E)) Uses = WeakObjectUses.find(WeakObjectProfileTy(IvarE)); else if (const DeclRefExpr *DRE = dyn_cast(E)) Uses = WeakObjectUses.find(WeakObjectProfileTy(DRE)); else if (const ObjCMessageExpr *MsgE = dyn_cast(E)) { Uses = WeakObjectUses.end(); if (const ObjCMethodDecl *MD = MsgE->getMethodDecl()) { if (const ObjCPropertyDecl *Prop = MD->findPropertyDecl()) { Uses = WeakObjectUses.find(WeakObjectProfileTy(MsgE->getInstanceReceiver(), Prop)); } } } else return; if (Uses == WeakObjectUses.end()) return; // Has there been a read from the object using this Expr? FunctionScopeInfo::WeakUseVector::reverse_iterator ThisUse = std::find(Uses->second.rbegin(), Uses->second.rend(), WeakUseTy(E, true)); if (ThisUse == Uses->second.rend()) return; ThisUse->markSafe(); } void LambdaScopeInfo::getPotentialVariableCapture(unsigned Idx, VarDecl *&VD, Expr *&E) const { assert(Idx < getNumPotentialVariableCaptures() && "Index of potential capture must be within 0 to less than the " "number of captures!"); E = PotentiallyCapturingExprs[Idx]; if (DeclRefExpr *DRE = dyn_cast(E)) VD = dyn_cast(DRE->getFoundDecl()); else if (MemberExpr *ME = dyn_cast(E)) VD = dyn_cast(ME->getMemberDecl()); else llvm_unreachable("Only DeclRefExprs or MemberExprs should be added for " "potential captures"); assert(VD); } FunctionScopeInfo::~FunctionScopeInfo() { } BlockScopeInfo::~BlockScopeInfo() { } LambdaScopeInfo::~LambdaScopeInfo() { } CapturedRegionScopeInfo::~CapturedRegionScopeInfo() { } @