1566b6ce741c742cc3f8cb85e2376ec4a3490ff5fChris Lattner//===--- CGExprAgg.cpp - Emit LLVM Code from Aggregate Expressions --------===// 2af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 3af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// The LLVM Compiler Infrastructure 4af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 7af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 8af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner//===----------------------------------------------------------------------===// 9af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 10af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// This contains code to emit Aggregate Expr nodes as LLVM code. 11af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 12af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner//===----------------------------------------------------------------------===// 13af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner 14af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner#include "CodeGenFunction.h" 15883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner#include "CodeGenModule.h" 16082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian#include "CGObjCRuntime.h" 17de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/ASTContext.h" 18b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson#include "clang/AST/DeclCXX.h" 1932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl#include "clang/AST/DeclTemplate.h" 20de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/StmtVisitor.h" 21883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner#include "llvm/Constants.h" 22883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner#include "llvm/Function.h" 23636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel#include "llvm/GlobalVariable.h" 24f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner#include "llvm/Intrinsics.h" 25af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattnerusing namespace clang; 26af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattnerusing namespace CodeGen; 27883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 289c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner//===----------------------------------------------------------------------===// 299c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner// Aggregate Expression Emitter 309c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner//===----------------------------------------------------------------------===// 319c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 329c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnernamespace { 3385b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass AggExprEmitter : public StmtVisitor<AggExprEmitter> { 349c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CodeGenFunction &CGF; 3545d196b8387dcefc4df26cda114fa34c6528e928Daniel Dunbar CGBuilderTy &Builder; 36558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall AggValueSlot Dest; 37ef072fd2f3347cfd857d6eb787b245b950771430John McCall 38410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall /// We want to use 'dest' as the return slot except under two 39410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall /// conditions: 40410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall /// - The destination slot requires garbage collection, so we 41410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall /// need to use the GC API. 42410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall /// - The destination slot is potentially aliased. 43410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall bool shouldUseDestForReturnSlot() const { 44410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall return !(Dest.requiresGCollection() || Dest.isPotentiallyAliased()); 45410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall } 46410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall 47ef072fd2f3347cfd857d6eb787b245b950771430John McCall ReturnValueSlot getReturnValueSlot() const { 48410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall if (!shouldUseDestForReturnSlot()) 49410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall return ReturnValueSlot(); 50fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 51558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall return ReturnValueSlot(Dest.getAddr(), Dest.isVolatile()); 52558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall } 53558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall 54558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall AggValueSlot EnsureSlot(QualType T) { 55558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall if (!Dest.isIgnored()) return Dest; 56558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall return CGF.CreateAggTemp(T, "agg.tmp.ensured"); 57ef072fd2f3347cfd857d6eb787b245b950771430John McCall } 58e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall void EnsureDest(QualType T) { 59e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (!Dest.isIgnored()) return; 60e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall Dest = CGF.CreateAggTemp(T, "agg.tmp.ensured"); 61e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall } 62fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 639c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnerpublic: 64e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall AggExprEmitter(CodeGenFunction &cgf, AggValueSlot Dest) 65e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall : CGF(cgf), Builder(CGF.Builder), Dest(Dest) { 669c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner } 679c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 68ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 69ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner // Utilities 70ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 71ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 729c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// EmitAggLoadOfLValue - Given an expression with aggregate type that 739c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// represents a value lvalue, this method emits the address of the lvalue, 749c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// then loads the result into DestPtr. 759c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void EmitAggLoadOfLValue(const Expr *E); 76922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 774ac20ddc7ab324a59862657f756bdd060076b137Mike Stump /// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 78e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall void EmitFinalDestCopy(QualType type, const LValue &src); 79e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall void EmitFinalDestCopy(QualType type, RValue src, 80e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall CharUnits srcAlignment = CharUnits::Zero()); 81e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall void EmitCopy(QualType type, const AggValueSlot &dest, 82e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall const AggValueSlot &src); 834ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 84410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall void EmitMoveFromReturnSlot(const Expr *E, RValue Src); 85fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 86af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl void EmitStdInitializerList(llvm::Value *DestPtr, InitListExpr *InitList); 8732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl void EmitArrayInit(llvm::Value *DestPtr, llvm::ArrayType *AType, 8832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl QualType elementType, InitListExpr *E); 8932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 907c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall AggValueSlot::NeedsGCBarriers_t needsGC(QualType T) { 914e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (CGF.getLangOpts().getGC() && TypeRequiresGCollection(T)) 927c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall return AggValueSlot::NeedsGCBarriers; 937c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall return AggValueSlot::DoesNotNeedGCBarriers; 947c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall } 957c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall 96fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall bool TypeRequiresGCollection(QualType T); 97fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 98ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 99ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner // Visitor Methods 100ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 1011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1029c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitStmt(Stmt *S) { 103488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar CGF.ErrorUnsupported(S, "aggregate expression"); 1049c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner } 1059c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitParenExpr(ParenExpr *PE) { Visit(PE->getSubExpr()); } 106f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne void VisitGenericSelectionExpr(GenericSelectionExpr *GE) { 107f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne Visit(GE->getResultExpr()); 108f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne } 10912444a24419fe88b42a16b46106db3c11ac5cd35Eli Friedman void VisitUnaryExtension(UnaryOperator *E) { Visit(E->getSubExpr()); } 11091a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall void VisitSubstNonTypeTemplateParmExpr(SubstNonTypeTemplateParmExpr *E) { 11191a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall return Visit(E->getReplacement()); 11291a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall } 1139c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 1149c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // l-values. 115f4b88a45902af1802a1cb42ba48b1c474474f228John McCall void VisitDeclRefExpr(DeclRefExpr *E) { 116dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall // For aggregates, we should always be able to emit the variable 117dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall // as an l-value unless it's a reference. This is due to the fact 118dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall // that we can't actually ever see a normal l2r conversion on an 119dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall // aggregate in C++, and in C there's no language standard 120dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall // actively preventing us from listing variables in the captures 121dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall // list of a block. 122f4b88a45902af1802a1cb42ba48b1c474474f228John McCall if (E->getDecl()->getType()->isReferenceType()) { 123dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall if (CodeGenFunction::ConstantEmission result 124f4b88a45902af1802a1cb42ba48b1c474474f228John McCall = CGF.tryEmitAsConstant(E)) { 125e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EmitFinalDestCopy(E->getType(), result.getReferenceLValue(CGF, E)); 126dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall return; 127dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall } 128dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall } 129dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall 130f4b88a45902af1802a1cb42ba48b1c474474f228John McCall EmitAggLoadOfLValue(E); 131dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall } 132dd2ecee313b558a9b621ec003b45e0fbc83508d7John McCall 1339b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitMemberExpr(MemberExpr *ME) { EmitAggLoadOfLValue(ME); } 1349b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitUnaryDeref(UnaryOperator *E) { EmitAggLoadOfLValue(E); } 1355be028f84243e0f6906c259e67cbdaf9bee431b2Daniel Dunbar void VisitStringLiteral(StringLiteral *E) { EmitAggLoadOfLValue(E); } 136751ec9be961888f14342fb63b39bf8727f0dee49Douglas Gregor void VisitCompoundLiteralExpr(CompoundLiteralExpr *E); 1379b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 1389b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon EmitAggLoadOfLValue(E); 1399b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon } 140f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitPredefinedExpr(const PredefinedExpr *E) { 1411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump EmitAggLoadOfLValue(E); 142f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 1431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1449c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // Operators. 1454d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson void VisitCastExpr(CastExpr *E); 146148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson void VisitCallExpr(const CallExpr *E); 147b2d963f527674275c9109252474948368b6e6161Chris Lattner void VisitStmtExpr(const StmtExpr *E); 1489c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitBinaryOperator(const BinaryOperator *BO); 1498bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian void VisitPointerToDataMemberBinaryOperator(const BinaryOperator *BO); 15003d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattner void VisitBinAssign(const BinaryOperator *E); 15107fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman void VisitBinComma(const BinaryOperator *E); 1529c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 1538fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner void VisitObjCMessageExpr(ObjCMessageExpr *E); 1540a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar void VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { 1550a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar EmitAggLoadOfLValue(E); 1560a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar } 1571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall void VisitAbstractConditionalOperator(const AbstractConditionalOperator *CO); 159a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson void VisitChooseExpr(const ChooseExpr *CE); 160636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel void VisitInitListExpr(InitListExpr *E); 16130311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson void VisitImplicitValueInitExpr(ImplicitValueInitExpr *E); 16204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { 16304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Visit(DAE->getExpr()); 16404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner } 165b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E); 16631ccf377f4a676eb6c205b47eef435de616d5e2dAnders Carlsson void VisitCXXConstructExpr(const CXXConstructExpr *E); 1674c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman void VisitLambdaExpr(LambdaExpr *E); 1684765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall void VisitExprWithCleanups(ExprWithCleanups *E); 169ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor void VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E); 1702710c4159ff4761ba9867aca18f60a178b297686Mike Stump void VisitCXXTypeidExpr(CXXTypeidExpr *E) { EmitAggLoadOfLValue(E); } 17103e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor void VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E); 172e996ffd240f20a1048179d7727a6ee3227261921John McCall void VisitOpaqueValueExpr(OpaqueValueExpr *E); 173e996ffd240f20a1048179d7727a6ee3227261921John McCall 1744b9c2d235fb9449e249d74f48ecfec601650de93John McCall void VisitPseudoObjectExpr(PseudoObjectExpr *E) { 1754b9c2d235fb9449e249d74f48ecfec601650de93John McCall if (E->isGLValue()) { 1764b9c2d235fb9449e249d74f48ecfec601650de93John McCall LValue LV = CGF.EmitPseudoObjectLValue(E); 177e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return EmitFinalDestCopy(E->getType(), LV); 1784b9c2d235fb9449e249d74f48ecfec601650de93John McCall } 1794b9c2d235fb9449e249d74f48ecfec601650de93John McCall 1804b9c2d235fb9449e249d74f48ecfec601650de93John McCall CGF.EmitPseudoObjectRValue(E, EnsureSlot(E->getType())); 1814b9c2d235fb9449e249d74f48ecfec601650de93John McCall } 1824b9c2d235fb9449e249d74f48ecfec601650de93John McCall 183b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman void VisitVAArgExpr(VAArgExpr *E); 184f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 185649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier void EmitInitializationToLValue(Expr *E, LValue Address); 186a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall void EmitNullInitializationToLValue(LValue Address); 1879c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // case Expr::ChooseExprClass: 18839406b1395f69341c045e863a6620310abdc55b6Mike Stump void VisitCXXThrowExpr(const CXXThrowExpr *E) { CGF.EmitCXXThrowExpr(E); } 189276b061970939293f1abaf694bd3ef05b2cbda79Eli Friedman void VisitAtomicExpr(AtomicExpr *E) { 190276b061970939293f1abaf694bd3ef05b2cbda79Eli Friedman CGF.EmitAtomicExpr(E, EnsureSlot(E->getType()).getAddr()); 191276b061970939293f1abaf694bd3ef05b2cbda79Eli Friedman } 1929c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner}; 1939c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner} // end anonymous namespace. 1949c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 195ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 196ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Utilities 197ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 1989c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 199883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// EmitAggLoadOfLValue - Given an expression with aggregate type that 200883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// represents a value lvalue, this method emits the address of the lvalue, 201883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// then loads the result into DestPtr. 2029c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::EmitAggLoadOfLValue(const Expr *E) { 2039c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LV = CGF.EmitLValue(E); 204e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EmitFinalDestCopy(E->getType(), LV); 2054ac20ddc7ab324a59862657f756bdd060076b137Mike Stump} 2064ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 207fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// \brief True if the given aggregate type requires special GC API calls. 208fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCallbool AggExprEmitter::TypeRequiresGCollection(QualType T) { 209fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // Only record types have members that might require garbage collection. 210fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall const RecordType *RecordTy = T->getAs<RecordType>(); 211fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall if (!RecordTy) return false; 212fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 213fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // Don't mess with non-trivial C++ types. 214fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RecordDecl *Record = RecordTy->getDecl(); 215fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall if (isa<CXXRecordDecl>(Record) && 216fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall (!cast<CXXRecordDecl>(Record)->hasTrivialCopyConstructor() || 217fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall !cast<CXXRecordDecl>(Record)->hasTrivialDestructor())) 218fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall return false; 219fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 220fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // Check whether the type has an object member. 221fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall return Record->hasObjectMember(); 222fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall} 223fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 224410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall/// \brief Perform the final move to DestPtr if for some reason 225410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall/// getReturnValueSlot() didn't use it directly. 226fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// 227fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// The idea is that you do something like this: 228fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// RValue Result = EmitSomething(..., getReturnValueSlot()); 229410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall/// EmitMoveFromReturnSlot(E, Result); 230410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall/// 231410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall/// If nothing interferes, this will cause the result to be emitted 232410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall/// directly into the return value slot. Otherwise, a final move 233410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall/// will be performed. 234e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCallvoid AggExprEmitter::EmitMoveFromReturnSlot(const Expr *E, RValue src) { 235410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall if (shouldUseDestForReturnSlot()) { 236410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall // Logically, Dest.getAddr() should equal Src.getAggregateAddr(). 237410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall // The possibility of undef rvalues complicates that a lot, 238410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall // though, so we can't really assert. 239410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall return; 24055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 241410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall 242e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Otherwise, copy from there to the destination. 243e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall assert(Dest.getAddr() != src.getAggregateAddr()); 244e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall std::pair<CharUnits, CharUnits> typeInfo = 24526397edfea66a29ef433b62b4db6d621db438f75Chad Rosier CGF.getContext().getTypeInfoInChars(E->getType()); 246e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EmitFinalDestCopy(E->getType(), src, typeInfo.second); 247fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall} 248fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 2494ac20ddc7ab324a59862657f756bdd060076b137Mike Stump/// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 250e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCallvoid AggExprEmitter::EmitFinalDestCopy(QualType type, RValue src, 251e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall CharUnits srcAlign) { 252e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall assert(src.isAggregate() && "value must be aggregate value!"); 253e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall LValue srcLV = CGF.MakeAddrLValue(src.getAggregateAddr(), type, srcAlign); 254e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EmitFinalDestCopy(type, srcLV); 255e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall} 2564ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 257e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall/// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 258e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCallvoid AggExprEmitter::EmitFinalDestCopy(QualType type, const LValue &src) { 259558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall // If Dest is ignored, then we're evaluating an aggregate expression 260e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // in a context that doesn't care about the result. Note that loads 261e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // from volatile l-values force the existence of a non-ignored 262e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // destination. 263e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (Dest.isIgnored()) 264e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return; 2658a97005f97a2a93fc2cd942c040668c5d4df7537Fariborz Jahanian 266e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall AggValueSlot srcAgg = 267e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall AggValueSlot::forLValue(src, AggValueSlot::IsDestructed, 268e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall needsGC(type), AggValueSlot::IsAliased); 269e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EmitCopy(type, Dest, srcAgg); 270e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall} 271883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 272e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall/// Perform a copy from the source into the destination. 273e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall/// 274e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall/// \param type - the type of the aggregate being copied; qualifiers are 275e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall/// ignored 276e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCallvoid AggExprEmitter::EmitCopy(QualType type, const AggValueSlot &dest, 277e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall const AggValueSlot &src) { 278e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (dest.requiresGCollection()) { 279e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall CharUnits sz = CGF.getContext().getTypeSizeInChars(type); 280e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall llvm::Value *size = llvm::ConstantInt::get(CGF.SizeTy, sz.getQuantity()); 28108c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian CGF.CGM.getObjCRuntime().EmitGCMemmoveCollectable(CGF, 282e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall dest.getAddr(), 283e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall src.getAddr(), 284e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall size); 28508c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian return; 28608c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian } 2874ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 288e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // If the result of the assignment is used, copy the LHS there also. 289e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // It's volatile if either side is. Use the minimum alignment of 290e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // the two sides. 291e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall CGF.EmitAggregateCopy(dest.getAddr(), src.getAddr(), type, 292e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall dest.isVolatile() || src.isVolatile(), 293e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall std::min(dest.getAlignment(), src.getAlignment())); 294883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 295883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 29632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redlstatic QualType GetStdInitializerListElementType(QualType T) { 29732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Just assume that this is really std::initializer_list. 29832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl ClassTemplateSpecializationDecl *specialization = 29932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl cast<ClassTemplateSpecializationDecl>(T->castAs<RecordType>()->getDecl()); 30032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl return specialization->getTemplateArgs()[0].getAsType(); 30132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl} 30232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 30332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl/// \brief Prepare cleanup for the temporary array. 30432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redlstatic void EmitStdInitializerListCleanup(CodeGenFunction &CGF, 30532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl QualType arrayType, 30632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Value *addr, 30732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl const InitListExpr *initList) { 30832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl QualType::DestructionKind dtorKind = arrayType.isDestructedType(); 30932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (!dtorKind) 31032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl return; // Type doesn't need destroying. 31132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (dtorKind != QualType::DK_cxx_destructor) { 31232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.ErrorUnsupported(initList, "ObjC ARC type in initializer_list"); 31332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl return; 31432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 31532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 31632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CodeGenFunction::Destroyer *destroyer = CGF.getDestroyer(dtorKind); 31732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.pushDestroy(NormalAndEHCleanup, addr, arrayType, destroyer, 31832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl /*EHCleanup=*/true); 31932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl} 32032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 32132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl/// \brief Emit the initializer for a std::initializer_list initialized with a 32232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl/// real initializer list. 323af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redlvoid AggExprEmitter::EmitStdInitializerList(llvm::Value *destPtr, 324af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl InitListExpr *initList) { 32532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // We emit an array containing the elements, then have the init list point 32632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // at the array. 32732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl ASTContext &ctx = CGF.getContext(); 32832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl unsigned numInits = initList->getNumInits(); 32932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl QualType element = GetStdInitializerListElementType(initList->getType()); 33032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::APInt size(ctx.getTypeSize(ctx.getSizeType()), numInits); 33132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl QualType array = ctx.getConstantArrayType(element, size, ArrayType::Normal,0); 33232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Type *LTy = CGF.ConvertTypeForMem(array); 33332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::AllocaInst *alloc = CGF.CreateTempAlloca(LTy); 33432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl alloc->setAlignment(ctx.getTypeAlignInChars(array).getQuantity()); 33532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl alloc->setName(".initlist."); 33632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 33732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl EmitArrayInit(alloc, cast<llvm::ArrayType>(LTy), element, initList); 33832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 33932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // FIXME: The diagnostics are somewhat out of place here. 34032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl RecordDecl *record = initList->getType()->castAs<RecordType>()->getDecl(); 34132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl RecordDecl::field_iterator field = record->field_begin(); 34232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (field == record->field_end()) { 34332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.ErrorUnsupported(initList, "weird std::initializer_list"); 344babcf9d04f4ed9d7ac96812e42c9e8fc0f1ae2c2Sebastian Redl return; 34532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 34632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 34732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl QualType elementPtr = ctx.getPointerType(element.withConst()); 34832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 34932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Start pointer. 35032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (!ctx.hasSameType(field->getType(), elementPtr)) { 35132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.ErrorUnsupported(initList, "weird std::initializer_list"); 352babcf9d04f4ed9d7ac96812e42c9e8fc0f1ae2c2Sebastian Redl return; 35332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 354377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman LValue DestLV = CGF.MakeNaturalAlignAddrLValue(destPtr, initList->getType()); 355581deb3da481053c4993c7600f97acf7768caac5David Blaikie LValue start = CGF.EmitLValueForFieldInitialization(DestLV, *field); 35632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Value *arrayStart = Builder.CreateStructGEP(alloc, 0, "arraystart"); 35732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.EmitStoreThroughLValue(RValue::get(arrayStart), start); 35832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl ++field; 35932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 36032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (field == record->field_end()) { 36132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.ErrorUnsupported(initList, "weird std::initializer_list"); 362babcf9d04f4ed9d7ac96812e42c9e8fc0f1ae2c2Sebastian Redl return; 36332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 364581deb3da481053c4993c7600f97acf7768caac5David Blaikie LValue endOrLength = CGF.EmitLValueForFieldInitialization(DestLV, *field); 36532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (ctx.hasSameType(field->getType(), elementPtr)) { 36632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // End pointer. 36732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Value *arrayEnd = Builder.CreateStructGEP(alloc,numInits, "arrayend"); 36832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.EmitStoreThroughLValue(RValue::get(arrayEnd), endOrLength); 36932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } else if(ctx.hasSameType(field->getType(), ctx.getSizeType())) { 37032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Length. 37132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.EmitStoreThroughLValue(RValue::get(Builder.getInt(size)), endOrLength); 37232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } else { 37332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.ErrorUnsupported(initList, "weird std::initializer_list"); 374babcf9d04f4ed9d7ac96812e42c9e8fc0f1ae2c2Sebastian Redl return; 37532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 37632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 37732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (!Dest.isExternallyDestructed()) 37832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl EmitStdInitializerListCleanup(CGF, array, alloc, initList); 37932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl} 38032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 38132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl/// \brief Emit initialization of an array from an initializer list. 38232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redlvoid AggExprEmitter::EmitArrayInit(llvm::Value *DestPtr, llvm::ArrayType *AType, 38332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl QualType elementType, InitListExpr *E) { 38432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl uint64_t NumInitElements = E->getNumInits(); 38532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 38632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl uint64_t NumArrayElements = AType->getNumElements(); 38732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl assert(NumInitElements <= NumArrayElements); 38832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 38932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // DestPtr is an array*. Construct an elementType* by drilling 39032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // down a level. 39132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Value *zero = llvm::ConstantInt::get(CGF.SizeTy, 0); 39232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Value *indices[] = { zero, zero }; 39332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Value *begin = 39432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl Builder.CreateInBoundsGEP(DestPtr, indices, "arrayinit.begin"); 39532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 39632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Exception safety requires us to destroy all the 39732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // already-constructed members if an initializer throws. 39832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // For that, we'll need an EH cleanup. 39932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl QualType::DestructionKind dtorKind = elementType.isDestructedType(); 40032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::AllocaInst *endOfInit = 0; 40132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl EHScopeStack::stable_iterator cleanup; 40232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Instruction *cleanupDominator = 0; 40332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (CGF.needsEHCleanup(dtorKind)) { 40432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // In principle we could tell the cleanup where we are more 40532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // directly, but the control flow can get so varied here that it 40632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // would actually be quite complex. Therefore we go through an 40732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // alloca. 40832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl endOfInit = CGF.CreateTempAlloca(begin->getType(), 40932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl "arrayinit.endOfInit"); 41032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl cleanupDominator = Builder.CreateStore(begin, endOfInit); 41132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.pushIrregularPartialArrayCleanup(begin, endOfInit, elementType, 41232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.getDestroyer(dtorKind)); 41332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl cleanup = CGF.EHStack.stable_begin(); 41432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 41532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Otherwise, remember that we didn't need a cleanup. 41632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } else { 41732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl dtorKind = QualType::DK_none; 41832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 41932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 42032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Value *one = llvm::ConstantInt::get(CGF.SizeTy, 1); 42132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 42232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // The 'current element to initialize'. The invariants on this 42332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // variable are complicated. Essentially, after each iteration of 42432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // the loop, it points to the last initialized element, except 42532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // that it points to the beginning of the array before any 42632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // elements have been initialized. 42732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Value *element = begin; 42832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 42932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Emit the explicit initializers. 43032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl for (uint64_t i = 0; i != NumInitElements; ++i) { 43132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Advance to the next element. 43232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (i > 0) { 43332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl element = Builder.CreateInBoundsGEP(element, one, "arrayinit.element"); 43432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 43532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Tell the cleanup that it needs to destroy up to this 43632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // element. TODO: some of these stores can be trivially 43732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // observed to be unnecessary. 43832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (endOfInit) Builder.CreateStore(element, endOfInit); 43932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 44032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 441af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl // If these are nested std::initializer_list inits, do them directly, 442af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl // because they are conceptually the same "location". 443af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl InitListExpr *initList = dyn_cast<InitListExpr>(E->getInit(i)); 444af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl if (initList && initList->initializesStdInitializerList()) { 445af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl EmitStdInitializerList(element, initList); 446af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl } else { 447af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl LValue elementLV = CGF.MakeAddrLValue(element, elementType); 448649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier EmitInitializationToLValue(E->getInit(i), elementLV); 449af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl } 45032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 45132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 45232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Check whether there's a non-trivial array-fill expression. 45332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Note that this will be a CXXConstructExpr even if the element 45432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // type is an array (or array of array, etc.) of class type. 45532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl Expr *filler = E->getArrayFiller(); 45632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl bool hasTrivialFiller = true; 45732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (CXXConstructExpr *cons = dyn_cast_or_null<CXXConstructExpr>(filler)) { 45832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl assert(cons->getConstructor()->isDefaultConstructor()); 45932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl hasTrivialFiller = cons->getConstructor()->isTrivial(); 46032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 46132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 46232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Any remaining elements need to be zero-initialized, possibly 46332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // using the filler expression. We can skip this if the we're 46432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // emitting to zeroed memory. 46532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (NumInitElements != NumArrayElements && 46632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl !(Dest.isZeroed() && hasTrivialFiller && 46732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.getTypes().isZeroInitializable(elementType))) { 46832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 46932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Use an actual loop. This is basically 47032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // do { *array++ = filler; } while (array != end); 47132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 47232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Advance to the start of the rest of the array. 47332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (NumInitElements) { 47432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl element = Builder.CreateInBoundsGEP(element, one, "arrayinit.start"); 47532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (endOfInit) Builder.CreateStore(element, endOfInit); 47632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 47732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 47832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Compute the end of the array. 47932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Value *end = Builder.CreateInBoundsGEP(begin, 48032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::ConstantInt::get(CGF.SizeTy, NumArrayElements), 48132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl "arrayinit.end"); 48232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 48332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::BasicBlock *entryBB = Builder.GetInsertBlock(); 48432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::BasicBlock *bodyBB = CGF.createBasicBlock("arrayinit.body"); 48532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 48632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Jump into the body. 48732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.EmitBlock(bodyBB); 48832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::PHINode *currentElement = 48932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl Builder.CreatePHI(element->getType(), 2, "arrayinit.cur"); 49032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl currentElement->addIncoming(element, entryBB); 49132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 49232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Emit the actual filler expression. 49332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl LValue elementLV = CGF.MakeAddrLValue(currentElement, elementType); 49432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (filler) 495649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier EmitInitializationToLValue(filler, elementLV); 49632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl else 49732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl EmitNullInitializationToLValue(elementLV); 49832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 49932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Move on to the next element. 50032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Value *nextElement = 50132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl Builder.CreateInBoundsGEP(currentElement, one, "arrayinit.next"); 50232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 50332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Tell the EH cleanup that we finished with the last element. 50432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (endOfInit) Builder.CreateStore(nextElement, endOfInit); 50532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 50632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Leave the loop if we're done. 50732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Value *done = Builder.CreateICmpEQ(nextElement, end, 50832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl "arrayinit.done"); 50932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::BasicBlock *endBB = CGF.createBasicBlock("arrayinit.end"); 51032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl Builder.CreateCondBr(done, endBB, bodyBB); 51132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl currentElement->addIncoming(nextElement, Builder.GetInsertBlock()); 51232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 51332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl CGF.EmitBlock(endBB); 51432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 51532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 51632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // Leave the partial-array cleanup if we entered one. 51732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (dtorKind) CGF.DeactivateCleanupBlock(cleanup, cleanupDominator); 51832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl} 51932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 520ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 521ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Visitor Methods 522ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 523ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 52403e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregorvoid AggExprEmitter::VisitMaterializeTemporaryExpr(MaterializeTemporaryExpr *E){ 52503e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor Visit(E->GetTemporaryExpr()); 52603e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor} 52703e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor 528e996ffd240f20a1048179d7727a6ee3227261921John McCallvoid AggExprEmitter::VisitOpaqueValueExpr(OpaqueValueExpr *e) { 529e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EmitFinalDestCopy(e->getType(), CGF.getOpaqueLValueMapping(e)); 530e996ffd240f20a1048179d7727a6ee3227261921John McCall} 531e996ffd240f20a1048179d7727a6ee3227261921John McCall 532751ec9be961888f14342fb63b39bf8727f0dee49Douglas Gregorvoid 533751ec9be961888f14342fb63b39bf8727f0dee49Douglas GregorAggExprEmitter::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 534673e98b4814642eb040a661fcc0f7953edd4c150Douglas Gregor if (E->getType().isPODType(CGF.getContext())) { 535673e98b4814642eb040a661fcc0f7953edd4c150Douglas Gregor // For a POD type, just emit a load of the lvalue + a copy, because our 536673e98b4814642eb040a661fcc0f7953edd4c150Douglas Gregor // compound literal might alias the destination. 537673e98b4814642eb040a661fcc0f7953edd4c150Douglas Gregor // FIXME: This is a band-aid; the real problem appears to be in our handling 538673e98b4814642eb040a661fcc0f7953edd4c150Douglas Gregor // of assignments, where we store directly into the LHS without checking 539673e98b4814642eb040a661fcc0f7953edd4c150Douglas Gregor // whether anything in the RHS aliases. 540673e98b4814642eb040a661fcc0f7953edd4c150Douglas Gregor EmitAggLoadOfLValue(E); 541673e98b4814642eb040a661fcc0f7953edd4c150Douglas Gregor return; 542673e98b4814642eb040a661fcc0f7953edd4c150Douglas Gregor } 543673e98b4814642eb040a661fcc0f7953edd4c150Douglas Gregor 544751ec9be961888f14342fb63b39bf8727f0dee49Douglas Gregor AggValueSlot Slot = EnsureSlot(E->getType()); 545751ec9be961888f14342fb63b39bf8727f0dee49Douglas Gregor CGF.EmitAggExpr(E->getInitializer(), Slot); 546751ec9be961888f14342fb63b39bf8727f0dee49Douglas Gregor} 547751ec9be961888f14342fb63b39bf8727f0dee49Douglas Gregor 548751ec9be961888f14342fb63b39bf8727f0dee49Douglas Gregor 5494d8673b645ad86e496b886a0f80b60763f67071dAnders Carlssonvoid AggExprEmitter::VisitCastExpr(CastExpr *E) { 5503016842613674ab80796567239c15d529aff1458Anders Carlsson switch (E->getCastKind()) { 551575b374fdbfc2c2224fd3047ac11ffc4b8db9ae5Anders Carlsson case CK_Dynamic: { 5522c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith // FIXME: Can this actually happen? We have no test coverage for it. 55369cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor assert(isa<CXXDynamicCastExpr>(E) && "CK_Dynamic without a dynamic_cast?"); 5542c9f87ca5cccbfdaad82762368af5b2323320653Richard Smith LValue LV = CGF.EmitCheckedLValue(E->getSubExpr(), 5557ac9ef1c82c779a5348ed11b3d10e01c58803b35Richard Smith CodeGenFunction::TCK_Load); 55669cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor // FIXME: Do we also need to handle property references here? 55769cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor if (LV.isSimple()) 55869cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor CGF.EmitDynamicCast(LV.getAddress(), cast<CXXDynamicCastExpr>(E)); 55969cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor else 56069cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor CGF.CGM.ErrorUnsupported(E, "non-simple lvalue dynamic_cast"); 56169cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor 562558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall if (!Dest.isIgnored()) 563558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall CGF.CGM.ErrorUnsupported(E, "lvalue dynamic_cast with a destination"); 56469cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor break; 56569cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor } 56669cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor 5672de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_ToUnion: { 5686591271275f7a3db357f3cb7af37ef86e800e4baJohn McCall if (Dest.isIgnored()) break; 5696591271275f7a3db357f3cb7af37ef86e800e4baJohn McCall 5704d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // GCC union extension 57179c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar QualType Ty = E->getSubExpr()->getType(); 57279c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar QualType PtrTy = CGF.getContext().getPointerType(Ty); 573558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall llvm::Value *CastPtr = Builder.CreateBitCast(Dest.getAddr(), 57434ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman CGF.ConvertType(PtrTy)); 575a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall EmitInitializationToLValue(E->getSubExpr(), 576649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier CGF.MakeAddrLValue(CastPtr, Ty)); 5773016842613674ab80796567239c15d529aff1458Anders Carlsson break; 5787e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes } 5791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5802de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_DerivedToBase: 5812de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_BaseToDerived: 5822de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_UncheckedDerivedToBase: { 583b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("cannot perform hierarchy conversion in EmitAggExpr: " 5842d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor "should have been unpacked before we got here"); 5852d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor } 5862d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor 587e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall case CK_LValueToRValue: 588e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // If we're loading from a volatile type, force the destination 589e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // into existence. 590e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (E->getSubExpr()->getType().isVolatileQualified()) { 591e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EnsureDest(E->getType()); 592e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return Visit(E->getSubExpr()); 593e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall } 594e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // fallthrough 595e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 5962de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_NoOp: 5977a7ee3033e44b45630981355460ef89efa0bdcc4David Chisnall case CK_AtomicToNonAtomic: 5987a7ee3033e44b45630981355460ef89efa0bdcc4David Chisnall case CK_NonAtomicToAtomic: 5992de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_UserDefinedConversion: 6002de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_ConstructorConversion: 6013016842613674ab80796567239c15d529aff1458Anders Carlsson assert(CGF.getContext().hasSameUnqualifiedType(E->getSubExpr()->getType(), 6023016842613674ab80796567239c15d529aff1458Anders Carlsson E->getType()) && 6033016842613674ab80796567239c15d529aff1458Anders Carlsson "Implicit cast types must be compatible"); 6043016842613674ab80796567239c15d529aff1458Anders Carlsson Visit(E->getSubExpr()); 6053016842613674ab80796567239c15d529aff1458Anders Carlsson break; 6060ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall 6072de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_LValueBitCast: 6080ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall llvm_unreachable("should not be emitting lvalue bitcast as rvalue"); 6091de4d4e8cb2e9c88809fea8092bc6e835a5473d2John McCall 6100ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_Dependent: 6110ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_BitCast: 6120ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_ArrayToPointerDecay: 6130ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_FunctionToPointerDecay: 6140ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_NullToPointer: 6150ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_NullToMemberPointer: 6160ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_BaseToDerivedMemberPointer: 6170ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_DerivedToBaseMemberPointer: 6180ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_MemberPointerToBoolean: 6194d4e5c1ae83f4510caa486b3ad19de13048f9f04John McCall case CK_ReinterpretMemberPointer: 6200ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_IntegralToPointer: 6210ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_PointerToIntegral: 6220ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_PointerToBoolean: 6230ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_ToVoid: 6240ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_VectorSplat: 6250ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_IntegralCast: 6260ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_IntegralToBoolean: 6270ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_IntegralToFloating: 6280ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_FloatingToIntegral: 6290ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_FloatingToBoolean: 6300ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_FloatingCast: 6311d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_CPointerToObjCPointerCast: 6321d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_BlockPointerToObjCPointerCast: 6330ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_AnyPointerToBlockPointerCast: 6340ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_ObjCObjectLValueCast: 6350ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_FloatingRealToComplex: 6360ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_FloatingComplexToReal: 6370ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_FloatingComplexToBoolean: 6380ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_FloatingComplexCast: 6390ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_FloatingComplexToIntegralComplex: 6400ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_IntegralRealToComplex: 6410ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_IntegralComplexToReal: 6420ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_IntegralComplexToBoolean: 6430ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_IntegralComplexCast: 6440ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall case CK_IntegralComplexToFloatingComplex: 64533e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCProduceObject: 64633e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCConsumeObject: 64733e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCReclaimReturnedObject: 64833e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCExtendBlockObject: 649ac1303eca6cbe3e623fb5ec6fe7ec184ef4b0dfaDouglas Gregor case CK_CopyAndAutoreleaseBlockObject: 650a6c66cedc022c9e5d45a937d6b8cff491a6bf81bEli Friedman case CK_BuiltinFnToFnPtr: 6510ae287a498b8cec2086fe6b7e753cbb3df63e74aJohn McCall llvm_unreachable("cast kind invalid for aggregate types"); 6523016842613674ab80796567239c15d529aff1458Anders Carlsson } 653e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson} 654e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson 6559619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitCallExpr(const CallExpr *E) { 656e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson if (E->getCallReturnType()->isReferenceType()) { 657e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson EmitAggLoadOfLValue(E); 658e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson return; 659e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson } 6601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 661fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RValue RV = CGF.EmitCallExpr(E, getReturnValueSlot()); 662410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall EmitMoveFromReturnSlot(E, RV); 663796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman} 6649619662a1d42e2008b865d3459c0677e149dad1bChris Lattner 6659619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) { 666fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RValue RV = CGF.EmitObjCMessageExpr(E, getReturnValueSlot()); 667410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall EmitMoveFromReturnSlot(E, RV); 6688fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 669796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 6709619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitBinComma(const BinaryOperator *E) { 6712a41637a995affa1563f4d82a8b026e326a2faa0John McCall CGF.EmitIgnoredExpr(E->getLHS()); 672558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall Visit(E->getRHS()); 67307fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman} 67407fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman 675b2d963f527674275c9109252474948368b6e6161Chris Lattnervoid AggExprEmitter::VisitStmtExpr(const StmtExpr *E) { 676150b462afc7a713edd19bcbbbb22381fe060d4f5John McCall CodeGenFunction::StmtExprEvaluation eval(CGF); 677558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall CGF.EmitCompoundStmt(*E->getSubStmt(), true, Dest); 678b2d963f527674275c9109252474948368b6e6161Chris Lattner} 679b2d963f527674275c9109252474948368b6e6161Chris Lattner 6809c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitBinaryOperator(const BinaryOperator *E) { 6812de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_PtrMemD || E->getOpcode() == BO_PtrMemI) 6828bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian VisitPointerToDataMemberBinaryOperator(E); 6838bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian else 6848bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian CGF.ErrorUnsupported(E, "aggregate binary expression"); 6858bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian} 6868bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian 6878bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanianvoid AggExprEmitter::VisitPointerToDataMemberBinaryOperator( 6888bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian const BinaryOperator *E) { 6898bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian LValue LV = CGF.EmitPointerToDataMemberBinaryExpr(E); 690e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EmitFinalDestCopy(E->getType(), LV); 691e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall} 692e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 693e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall/// Is the value of the given expression possibly a reference to or 694e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall/// into a __block variable? 695e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCallstatic bool isBlockVarRef(const Expr *E) { 696e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Make sure we look through parens. 697e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall E = E->IgnoreParens(); 698e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 699e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Check for a direct reference to a __block variable. 700e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 701e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall const VarDecl *var = dyn_cast<VarDecl>(DRE->getDecl()); 702e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return (var && var->hasAttr<BlocksAttr>()); 703e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall } 704e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 705e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // More complicated stuff. 706e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 707e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Binary operators. 708e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (const BinaryOperator *op = dyn_cast<BinaryOperator>(E)) { 709e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // For an assignment or pointer-to-member operation, just care 710e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // about the LHS. 711e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (op->isAssignmentOp() || op->isPtrMemOp()) 712e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return isBlockVarRef(op->getLHS()); 713e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 714e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // For a comma, just care about the RHS. 715e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (op->getOpcode() == BO_Comma) 716e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return isBlockVarRef(op->getRHS()); 717e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 718e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // FIXME: pointer arithmetic? 719e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return false; 720e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 721e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Check both sides of a conditional operator. 722e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall } else if (const AbstractConditionalOperator *op 723e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall = dyn_cast<AbstractConditionalOperator>(E)) { 724e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return isBlockVarRef(op->getTrueExpr()) 725e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall || isBlockVarRef(op->getFalseExpr()); 726e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 727e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // OVEs are required to support BinaryConditionalOperators. 728e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall } else if (const OpaqueValueExpr *op 729e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall = dyn_cast<OpaqueValueExpr>(E)) { 730e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (const Expr *src = op->getSourceExpr()) 731e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return isBlockVarRef(src); 732e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 733e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Casts are necessary to get things like (*(int*)&var) = foo(). 734e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // We don't really care about the kind of cast here, except 735e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // we don't want to look through l2r casts, because it's okay 736e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // to get the *value* in a __block variable. 737e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall } else if (const CastExpr *cast = dyn_cast<CastExpr>(E)) { 738e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (cast->getCastKind() == CK_LValueToRValue) 739e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return false; 740e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return isBlockVarRef(cast->getSubExpr()); 741e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 742e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Handle unary operators. Again, just aggressively look through 743e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // it, ignoring the operation. 744e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall } else if (const UnaryOperator *uop = dyn_cast<UnaryOperator>(E)) { 745e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return isBlockVarRef(uop->getSubExpr()); 746e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 747e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Look into the base of a field access. 748e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall } else if (const MemberExpr *mem = dyn_cast<MemberExpr>(E)) { 749e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return isBlockVarRef(mem->getBase()); 750e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 751e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Look into the base of a subscript. 752e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall } else if (const ArraySubscriptExpr *sub = dyn_cast<ArraySubscriptExpr>(E)) { 753e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return isBlockVarRef(sub->getBase()); 754e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall } 755e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 756e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return false; 757ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 758ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 75903d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattnervoid AggExprEmitter::VisitBinAssign(const BinaryOperator *E) { 760ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // For an assignment to work, the value on the right has 761ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // to be compatible with the value on the left. 7622dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(), 7632dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman E->getRHS()->getType()) 764ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman && "Invalid assignment"); 765cd940a1e13e588a43973cd7ae33b5c33a3062739John McCall 766e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // If the LHS might be a __block variable, and the RHS can 767e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // potentially cause a block copy, we need to evaluate the RHS first 768e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // so that the assignment goes the right place. 769e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // This is pretty semantically fragile. 770e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (isBlockVarRef(E->getLHS()) && 771e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall E->getRHS()->HasSideEffects(CGF.getContext())) { 772e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Ensure that we have a destination, and evaluate the RHS into that. 773e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EnsureDest(E->getRHS()->getType()); 774e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall Visit(E->getRHS()); 775e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 776e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Now emit the LHS and copy into it. 777e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall LValue LHS = CGF.EmitLValue(E->getLHS()); 778e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 779e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EmitCopy(E->getLHS()->getType(), 780e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall AggValueSlot::forLValue(LHS, AggValueSlot::IsDestructed, 781e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall needsGC(E->getLHS()->getType()), 782e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall AggValueSlot::IsAliased), 783e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall Dest); 784e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall return; 785e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall } 786649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier 7879c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LHS = CGF.EmitLValue(E->getLHS()); 788883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 789db45806b991013280a03057025c9538de64d5dfbJohn McCall // Codegen the RHS so that it stores directly into the LHS. 790db45806b991013280a03057025c9538de64d5dfbJohn McCall AggValueSlot LHSSlot = 791db45806b991013280a03057025c9538de64d5dfbJohn McCall AggValueSlot::forLValue(LHS, AggValueSlot::IsDestructed, 792db45806b991013280a03057025c9538de64d5dfbJohn McCall needsGC(E->getLHS()->getType()), 793649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier AggValueSlot::IsAliased); 794e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall CGF.EmitAggExpr(E->getRHS(), LHSSlot); 795e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall 796e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall // Copy into the destination if the assignment isn't ignored. 797e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EmitFinalDestCopy(E->getType(), LHS); 798883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 799883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 80056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallvoid AggExprEmitter:: 80156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallVisitAbstractConditionalOperator(const AbstractConditionalOperator *E) { 8029615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 8039615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 8049615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 8051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 80656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall // Bind the common expression if necessary. 807d97927d69b277120f8d403580c44acd84907d7b4Eli Friedman CodeGenFunction::OpaqueValueMapping binding(CGF, E); 80856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 809150b462afc7a713edd19bcbbbb22381fe060d4f5John McCall CodeGenFunction::ConditionalEvaluation eval(CGF); 8108e274bd14bcca8466542477844b88e90e90cde1aEli Friedman CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock); 8111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 81274fb0edb44b7ed52af9b8053032ccaab29b5c0ccJohn McCall // Save whether the destination's lifetime is externally managed. 813fd71fb81c5f9382caf0131946e890b133e12ceb5John McCall bool isExternallyDestructed = Dest.isExternallyDestructed(); 814883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 815150b462afc7a713edd19bcbbbb22381fe060d4f5John McCall eval.begin(CGF); 816150b462afc7a713edd19bcbbbb22381fe060d4f5John McCall CGF.EmitBlock(LHSBlock); 81756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Visit(E->getTrueExpr()); 818150b462afc7a713edd19bcbbbb22381fe060d4f5John McCall eval.end(CGF); 8191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 820150b462afc7a713edd19bcbbbb22381fe060d4f5John McCall assert(CGF.HaveInsertPoint() && "expression evaluation ended with no IP!"); 821150b462afc7a713edd19bcbbbb22381fe060d4f5John McCall CGF.Builder.CreateBr(ContBlock); 8221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 82374fb0edb44b7ed52af9b8053032ccaab29b5c0ccJohn McCall // If the result of an agg expression is unused, then the emission 82474fb0edb44b7ed52af9b8053032ccaab29b5c0ccJohn McCall // of the LHS might need to create a destination slot. That's fine 82574fb0edb44b7ed52af9b8053032ccaab29b5c0ccJohn McCall // with us, and we can safely emit the RHS into the same slot, but 826fd71fb81c5f9382caf0131946e890b133e12ceb5John McCall // we shouldn't claim that it's already being destructed. 827fd71fb81c5f9382caf0131946e890b133e12ceb5John McCall Dest.setExternallyDestructed(isExternallyDestructed); 82874fb0edb44b7ed52af9b8053032ccaab29b5c0ccJohn McCall 829150b462afc7a713edd19bcbbbb22381fe060d4f5John McCall eval.begin(CGF); 830150b462afc7a713edd19bcbbbb22381fe060d4f5John McCall CGF.EmitBlock(RHSBlock); 83156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Visit(E->getFalseExpr()); 832150b462afc7a713edd19bcbbbb22381fe060d4f5John McCall eval.end(CGF); 8331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8349c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(ContBlock); 835883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 836ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 837a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlssonvoid AggExprEmitter::VisitChooseExpr(const ChooseExpr *CE) { 838a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson Visit(CE->getChosenSubExpr(CGF.getContext())); 839a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson} 840a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson 841b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedmanvoid AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 8420785570af3ef5f8c5a0377129e41efe6f3f8d770Daniel Dunbar llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); 843ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 844ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 8450262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl if (!ArgPtr) { 846ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.ErrorUnsupported(VE, "aggregate va_arg expression"); 8470262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl return; 8480262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl } 8490262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl 850e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EmitFinalDestCopy(VE->getType(), CGF.MakeAddrLValue(ArgPtr, VE->getType())); 851b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman} 852b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman 853b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlssonvoid AggExprEmitter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { 854558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall // Ensure that we have a slot, but if we already do, remember 855fd71fb81c5f9382caf0131946e890b133e12ceb5John McCall // whether it was externally destructed. 856fd71fb81c5f9382caf0131946e890b133e12ceb5John McCall bool wasExternallyDestructed = Dest.isExternallyDestructed(); 857e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EnsureDest(E->getType()); 858fd71fb81c5f9382caf0131946e890b133e12ceb5John McCall 859fd71fb81c5f9382caf0131946e890b133e12ceb5John McCall // We're going to push a destructor if there isn't already one. 860fd71fb81c5f9382caf0131946e890b133e12ceb5John McCall Dest.setExternallyDestructed(); 861558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall 862558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall Visit(E->getSubExpr()); 863558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall 864fd71fb81c5f9382caf0131946e890b133e12ceb5John McCall // Push that destructor we promised. 865fd71fb81c5f9382caf0131946e890b133e12ceb5John McCall if (!wasExternallyDestructed) 86686811609d9353e3aed198045d56e790eb3b6118cPeter Collingbourne CGF.EmitCXXTemporary(E->getTemporary(), E->getType(), Dest.getAddr()); 867b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson} 868b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 869b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlssonvoid 87031ccf377f4a676eb6c205b47eef435de616d5e2dAnders CarlssonAggExprEmitter::VisitCXXConstructExpr(const CXXConstructExpr *E) { 871558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall AggValueSlot Slot = EnsureSlot(E->getType()); 872558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall CGF.EmitCXXConstructExpr(E, Slot); 8737f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson} 8747f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 8754c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedmanvoid 8764c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli FriedmanAggExprEmitter::VisitLambdaExpr(LambdaExpr *E) { 8774c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman AggValueSlot Slot = EnsureSlot(E->getType()); 8784c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman CGF.EmitLambdaExpr(E, Slot); 8794c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman} 8804c5d8afd100189b6cce4fd89bfb8aec5700acb50Eli Friedman 8814765fa05b5652fcc4356371c2f481d0ea9a1b007John McCallvoid AggExprEmitter::VisitExprWithCleanups(ExprWithCleanups *E) { 8821a343ebbf413e8eae6b2737b2b2d79cbf5765571John McCall CGF.enterFullExpression(E); 8831a343ebbf413e8eae6b2737b2b2d79cbf5765571John McCall CodeGenFunction::RunCleanupsScope cleanups(CGF); 8841a343ebbf413e8eae6b2737b2b2d79cbf5765571John McCall Visit(E->getSubExpr()); 885b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson} 886b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson 887ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregorvoid AggExprEmitter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) { 888558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall QualType T = E->getType(); 889558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall AggValueSlot Slot = EnsureSlot(T); 890a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall EmitNullInitializationToLValue(CGF.MakeAddrLValue(Slot.getAddr(), T)); 89130311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson} 89230311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson 89330311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlssonvoid AggExprEmitter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) { 894558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall QualType T = E->getType(); 895558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall AggValueSlot Slot = EnsureSlot(T); 896a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall EmitNullInitializationToLValue(CGF.MakeAddrLValue(Slot.getAddr(), T)); 897329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes} 898329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes 8991b726771d00762fb5c4c2638e60d134c385493aeChris Lattner/// isSimpleZero - If emitting this value will obviously just cause a store of 9001b726771d00762fb5c4c2638e60d134c385493aeChris Lattner/// zero to memory, return true. This can return false if uncertain, so it just 9011b726771d00762fb5c4c2638e60d134c385493aeChris Lattner/// handles simple cases. 9021b726771d00762fb5c4c2638e60d134c385493aeChris Lattnerstatic bool isSimpleZero(const Expr *E, CodeGenFunction &CGF) { 903f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne E = E->IgnoreParens(); 904f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne 9051b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // 0 9061b726771d00762fb5c4c2638e60d134c385493aeChris Lattner if (const IntegerLiteral *IL = dyn_cast<IntegerLiteral>(E)) 9071b726771d00762fb5c4c2638e60d134c385493aeChris Lattner return IL->getValue() == 0; 9081b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // +0.0 9091b726771d00762fb5c4c2638e60d134c385493aeChris Lattner if (const FloatingLiteral *FL = dyn_cast<FloatingLiteral>(E)) 9101b726771d00762fb5c4c2638e60d134c385493aeChris Lattner return FL->getValue().isPosZero(); 9111b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // int() 9121b726771d00762fb5c4c2638e60d134c385493aeChris Lattner if ((isa<ImplicitValueInitExpr>(E) || isa<CXXScalarValueInitExpr>(E)) && 9131b726771d00762fb5c4c2638e60d134c385493aeChris Lattner CGF.getTypes().isZeroInitializable(E->getType())) 9141b726771d00762fb5c4c2638e60d134c385493aeChris Lattner return true; 9151b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // (int*)0 - Null pointer expressions. 9161b726771d00762fb5c4c2638e60d134c385493aeChris Lattner if (const CastExpr *ICE = dyn_cast<CastExpr>(E)) 9171b726771d00762fb5c4c2638e60d134c385493aeChris Lattner return ICE->getCastKind() == CK_NullToPointer; 9181b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // '\0' 9191b726771d00762fb5c4c2638e60d134c385493aeChris Lattner if (const CharacterLiteral *CL = dyn_cast<CharacterLiteral>(E)) 9201b726771d00762fb5c4c2638e60d134c385493aeChris Lattner return CL->getValue() == 0; 9211b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 9221b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // Otherwise, hard case: conservatively return false. 9231b726771d00762fb5c4c2638e60d134c385493aeChris Lattner return false; 9241b726771d00762fb5c4c2638e60d134c385493aeChris Lattner} 9251b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 9261b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 92778e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlssonvoid 928649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad RosierAggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV) { 929a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall QualType type = LV.getType(); 9307f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // FIXME: Ignore result? 931f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // FIXME: Are initializers affected by volatile? 9321b726771d00762fb5c4c2638e60d134c385493aeChris Lattner if (Dest.isZeroed() && isSimpleZero(E, CGF)) { 9331b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // Storing "i32 0" to a zero'd memory location is a noop. 9341b726771d00762fb5c4c2638e60d134c385493aeChris Lattner } else if (isa<ImplicitValueInitExpr>(E)) { 935a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall EmitNullInitializationToLValue(LV); 936a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall } else if (type->isReferenceType()) { 93732f36baa6c8d491c374af622b4e3ac28d597453cAnders Carlsson RValue RV = CGF.EmitReferenceBindingToExpr(E, /*InitializedDecl=*/0); 938545d996ec5a3113f046944f11b27cc2d6cb055b4John McCall CGF.EmitStoreThroughLValue(RV, LV); 939a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall } else if (type->isAnyComplexType()) { 9403498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false); 941a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall } else if (CGF.hasAggregateLLVMType(type)) { 9427c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall CGF.EmitAggExpr(E, AggValueSlot::forLValue(LV, 9437c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall AggValueSlot::IsDestructed, 9447c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall AggValueSlot::DoesNotNeedGCBarriers, 945410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall AggValueSlot::IsNotAliased, 946a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall Dest.isZeroed())); 947f85e193739c953358c865005855253af4f68a497John McCall } else if (LV.isSimple()) { 948a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall CGF.EmitScalarInit(E, /*D=*/0, LV, /*Captured=*/false); 949c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else { 950545d996ec5a3113f046944f11b27cc2d6cb055b4John McCall CGF.EmitStoreThroughLValue(RValue::get(CGF.EmitScalarExpr(E)), LV); 951f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 952f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 953305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 954a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCallvoid AggExprEmitter::EmitNullInitializationToLValue(LValue lv) { 955a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall QualType type = lv.getType(); 956a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall 9571b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // If the destination slot is already zeroed out before the aggregate is 9581b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // copied into it, we don't have to emit any zeros here. 959a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall if (Dest.isZeroed() && CGF.getTypes().isZeroInitializable(type)) 9601b726771d00762fb5c4c2638e60d134c385493aeChris Lattner return; 9611b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 962a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall if (!CGF.hasAggregateLLVMType(type)) { 963b1e3f324b0c4d17399609c246918dadcb886d739Eli Friedman // For non-aggregates, we can store zero. 964a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall llvm::Value *null = llvm::Constant::getNullValue(CGF.ConvertType(type)); 965b1e3f324b0c4d17399609c246918dadcb886d739Eli Friedman // Note that the following is not equivalent to 966b1e3f324b0c4d17399609c246918dadcb886d739Eli Friedman // EmitStoreThroughBitfieldLValue for ARC types. 9675a13d4d2c1e45ab611ca857d923caacfaeb3cd07Eli Friedman if (lv.isBitField()) { 968b1e3f324b0c4d17399609c246918dadcb886d739Eli Friedman CGF.EmitStoreThroughBitfieldLValue(RValue::get(null), lv); 9695a13d4d2c1e45ab611ca857d923caacfaeb3cd07Eli Friedman } else { 9705a13d4d2c1e45ab611ca857d923caacfaeb3cd07Eli Friedman assert(lv.isSimple()); 9715a13d4d2c1e45ab611ca857d923caacfaeb3cd07Eli Friedman CGF.EmitStoreOfScalar(null, lv, /* isInitialization */ true); 9725a13d4d2c1e45ab611ca857d923caacfaeb3cd07Eli Friedman } 973f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 974f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // There's a potential optimization opportunity in combining 975f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // memsets; that would be easy for arrays, but relatively 976f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // difficult for structures with the current code. 977a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall CGF.EmitNullInitialization(lv.getAddress(), lv.getType()); 978f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 979f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 980305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 981f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::VisitInitListExpr(InitListExpr *E) { 982a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#if 0 98313a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // FIXME: Assess perf here? Figure out what cases are worth optimizing here 98413a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // (Length of globals? Chunks of zeroed-out space?). 985a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // 986f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // If we can, prefer a copy from a global; this is a lot less code for long 987f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // globals, and it's easier for the current optimizers to analyze. 98813a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman if (llvm::Constant* C = CGF.CGM.EmitConstantExpr(E, E->getType(), &CGF)) { 989994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalVariable* GV = 99013a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman new llvm::GlobalVariable(CGF.CGM.getModule(), C->getType(), true, 99113a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman llvm::GlobalValue::InternalLinkage, C, ""); 992e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall EmitFinalDestCopy(E->getType(), CGF.MakeAddrLValue(GV, E->getType())); 993994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman return; 994994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman } 995a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#endif 996d0db03a561671b8b466b07026cc8fbbb037bb639Chris Lattner if (E->hadArrayRangeDesignator()) 997a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor CGF.ErrorUnsupported(E, "GNU array range designator extension"); 998a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor 99932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (E->initializesStdInitializerList()) { 1000af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl EmitStdInitializerList(Dest.getAddr(), E); 100132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl return; 100232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 100332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 1004377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman AggValueSlot Dest = EnsureSlot(E->getType()); 1005377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman LValue DestLV = CGF.MakeAddrLValue(Dest.getAddr(), E->getType(), 1006377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman Dest.getAlignment()); 1007558d2abc7f9fd6801cc7677200992313ae90b5d8John McCall 1008f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Handle initialization of an array. 1009f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isArrayType()) { 1010fe587201feaebc69e6d18858bea85c77926b6ecfRichard Smith if (E->isStringLiteralInit()) 1011fe587201feaebc69e6d18858bea85c77926b6ecfRichard Smith return Visit(E->getInit(0)); 1012922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 10135c89c399ba0a171e3312a74e008d61d174d961f3Eli Friedman QualType elementType = 10145c89c399ba0a171e3312a74e008d61d174d961f3Eli Friedman CGF.getContext().getAsArrayType(E->getType())->getElementType(); 1015bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall 101632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::PointerType *APType = 1017377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman cast<llvm::PointerType>(Dest.getAddr()->getType()); 101832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::ArrayType *AType = 101932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl cast<llvm::ArrayType>(APType->getElementType()); 1020bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall 1021377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman EmitArrayInit(Dest.getAddr(), AType, elementType, E); 1022305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio return; 1023f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 10241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1025f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner assert(E->getType()->isRecordType() && "Only support structs/unions here!"); 10261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1027f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Do struct initialization; this code just sets each individual member 1028f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // to the approprate value. This makes bitfield support automatic; 1029f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the disadvantage is that the generated code is more difficult for 1030f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the optimizer, especially with bitfields. 1031f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumInitElements = E->getNumInits(); 10322b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall RecordDecl *record = E->getType()->castAs<RecordType>()->getDecl(); 1033bd7de38eae1fc20ee88db63f469c54241bc240f8Chris Lattner 10342b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall if (record->isUnion()) { 10350bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Only initialize one field of a union. The field itself is 10360bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // specified by the initializer list. 10370bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (!E->getInitializedFieldInUnion()) { 10380bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Empty union; we have nothing to do. 10391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10400bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#ifndef NDEBUG 10410bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Make sure that it's really an empty and not a failure of 10420bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // semantic analysis. 10432b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall for (RecordDecl::field_iterator Field = record->field_begin(), 10442b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall FieldEnd = record->field_end(); 10450bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor Field != FieldEnd; ++Field) 10460bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor assert(Field->isUnnamedBitfield() && "Only unnamed bitfields allowed"); 10470bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#endif 10480bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 10490bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 10500bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 10510bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // FIXME: volatility 10520bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor FieldDecl *Field = E->getInitializedFieldInUnion(); 10530bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 1054377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman LValue FieldLoc = CGF.EmitLValueForFieldInitialization(DestLV, Field); 10550bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (NumInitElements) { 10560bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Store the initializer into the field 1057649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier EmitInitializationToLValue(E->getInit(0), FieldLoc); 10580bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } else { 10591b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // Default-initialize to null. 1060a07398ed98ea2b55ad7a505a3aab18aed93b149fJohn McCall EmitNullInitializationToLValue(FieldLoc); 10610bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 10620bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 10630bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 10640bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 10651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10662b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // We'll need to enter cleanup scopes in case any of the member 10672b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // initializers throw an exception. 10685f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<EHScopeStack::stable_iterator, 16> cleanups; 10696f103ba42cb69d50005a977c5ea583984ab63fc4John McCall llvm::Instruction *cleanupDominator = 0; 10702b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall 1071f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Here we iterate over the fields; this makes it simpler to both 1072f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // default-initialize fields and skip over unnamed fields. 10732b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall unsigned curInitIndex = 0; 10742b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall for (RecordDecl::field_iterator field = record->field_begin(), 10752b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall fieldEnd = record->field_end(); 10762b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall field != fieldEnd; ++field) { 10772b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // We're done once we hit the flexible array member. 10782b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall if (field->getType()->isIncompleteArrayType()) 107944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor break; 108044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 10812b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // Always skip anonymous bitfields. 10822b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall if (field->isUnnamedBitfield()) 1083f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner continue; 108434e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor 10852b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // We're done if we reach the end of the explicit initializers, we 10862b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // have a zeroed object, and the rest of the fields are 10872b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // zero-initializable. 10882b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall if (curInitIndex == NumInitElements && Dest.isZeroed() && 10891b726771d00762fb5c4c2638e60d134c385493aeChris Lattner CGF.getTypes().isZeroInitializable(E->getType())) 10901b726771d00762fb5c4c2638e60d134c385493aeChris Lattner break; 10911b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 1092377ecc7996dce6803f7b7b6208cab5e197c9c5b8Eli Friedman 1093581deb3da481053c4993c7600f97acf7768caac5David Blaikie LValue LV = CGF.EmitLValueForFieldInitialization(DestLV, *field); 109414674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian // We never generate write-barries for initialized fields. 10952b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall LV.setNonGC(true); 10961b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 10972b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall if (curInitIndex < NumInitElements) { 1098b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner // Store the initializer into the field. 1099649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier EmitInitializationToLValue(E->getInit(curInitIndex++), LV); 1100f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 1101f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // We're out of initalizers; default-initialize to null 11022b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall EmitNullInitializationToLValue(LV); 11032b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall } 11042b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall 11052b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // Push a destructor if necessary. 11062b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // FIXME: if we have an array of structures, all explicitly 11072b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // initialized, we can end up pushing a linear number of cleanups. 11082b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall bool pushedCleanup = false; 11092b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall if (QualType::DestructionKind dtorKind 11102b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall = field->getType().isDestructedType()) { 11112b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall assert(LV.isSimple()); 11122b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall if (CGF.needsEHCleanup(dtorKind)) { 11136f103ba42cb69d50005a977c5ea583984ab63fc4John McCall if (!cleanupDominator) 11146f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator = CGF.Builder.CreateUnreachable(); // placeholder 11156f103ba42cb69d50005a977c5ea583984ab63fc4John McCall 11162b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall CGF.pushDestroy(EHCleanup, LV.getAddress(), field->getType(), 11172b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall CGF.getDestroyer(dtorKind), false); 11182b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall cleanups.push_back(CGF.EHStack.stable_begin()); 11192b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall pushedCleanup = true; 11202b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall } 1121f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 11221b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 11231b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // If the GEP didn't get used because of a dead zero init or something 11241b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // else, clean it up for -O0 builds and general tidiness. 11252b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall if (!pushedCleanup && LV.isSimple()) 11261b726771d00762fb5c4c2638e60d134c385493aeChris Lattner if (llvm::GetElementPtrInst *GEP = 11272b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall dyn_cast<llvm::GetElementPtrInst>(LV.getAddress())) 11281b726771d00762fb5c4c2638e60d134c385493aeChris Lattner if (GEP->use_empty()) 11291b726771d00762fb5c4c2638e60d134c385493aeChris Lattner GEP->eraseFromParent(); 1130145cd89f9233d375381aa13bd28b2d36f83e6181Lauro Ramos Venancio } 11312b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall 11322b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // Deactivate all the partial cleanups in reverse order, which 11332b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall // generally means popping them. 11342b30dcfb769e4015f8d41c5c9a4e723ff3d522a0John McCall for (unsigned i = cleanups.size(); i != 0; --i) 11356f103ba42cb69d50005a977c5ea583984ab63fc4John McCall CGF.DeactivateCleanupBlock(cleanups[i-1], cleanupDominator); 11366f103ba42cb69d50005a977c5ea583984ab63fc4John McCall 11376f103ba42cb69d50005a977c5ea583984ab63fc4John McCall // Destroy the placeholder if we made one. 11386f103ba42cb69d50005a977c5ea583984ab63fc4John McCall if (cleanupDominator) 11396f103ba42cb69d50005a977c5ea583984ab63fc4John McCall cleanupDominator->eraseFromParent(); 1140636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel} 1141636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 1142ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 1143ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Entry Points into this File 1144ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 1145ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 11461b726771d00762fb5c4c2638e60d134c385493aeChris Lattner/// GetNumNonZeroBytesInInit - Get an approximate count of the number of 11471b726771d00762fb5c4c2638e60d134c385493aeChris Lattner/// non-zero bytes that will be stored when outputting the initializer for the 11481b726771d00762fb5c4c2638e60d134c385493aeChris Lattner/// specified initializer expression. 114902c45333b8310bb792a15f85f219706025f9752cKen Dyckstatic CharUnits GetNumNonZeroBytesInInit(const Expr *E, CodeGenFunction &CGF) { 1150f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne E = E->IgnoreParens(); 11511b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 11521b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // 0 and 0.0 won't require any non-zero stores! 115302c45333b8310bb792a15f85f219706025f9752cKen Dyck if (isSimpleZero(E, CGF)) return CharUnits::Zero(); 11541b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 11551b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // If this is an initlist expr, sum up the size of sizes of the (present) 11561b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // elements. If this is something weird, assume the whole thing is non-zero. 11571b726771d00762fb5c4c2638e60d134c385493aeChris Lattner const InitListExpr *ILE = dyn_cast<InitListExpr>(E); 11581b726771d00762fb5c4c2638e60d134c385493aeChris Lattner if (ILE == 0 || !CGF.getTypes().isZeroInitializable(ILE->getType())) 115902c45333b8310bb792a15f85f219706025f9752cKen Dyck return CGF.getContext().getTypeSizeInChars(E->getType()); 11601b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 1161d1d56df188e25c633f9bc65d229897b42442b0f7Chris Lattner // InitListExprs for structs have to be handled carefully. If there are 1162d1d56df188e25c633f9bc65d229897b42442b0f7Chris Lattner // reference members, we need to consider the size of the reference, not the 1163d1d56df188e25c633f9bc65d229897b42442b0f7Chris Lattner // referencee. InitListExprs for unions and arrays can't have references. 11648c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner if (const RecordType *RT = E->getType()->getAs<RecordType>()) { 11658c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner if (!RT->isUnionType()) { 11668c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner RecordDecl *SD = E->getType()->getAs<RecordType>()->getDecl(); 116702c45333b8310bb792a15f85f219706025f9752cKen Dyck CharUnits NumNonZeroBytes = CharUnits::Zero(); 1168d1d56df188e25c633f9bc65d229897b42442b0f7Chris Lattner 11698c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner unsigned ILEElement = 0; 11708c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner for (RecordDecl::field_iterator Field = SD->field_begin(), 11718c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner FieldEnd = SD->field_end(); Field != FieldEnd; ++Field) { 11728c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner // We're done once we hit the flexible array member or run out of 11738c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner // InitListExpr elements. 11748c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner if (Field->getType()->isIncompleteArrayType() || 11758c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner ILEElement == ILE->getNumInits()) 11768c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner break; 11778c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner if (Field->isUnnamedBitfield()) 11788c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner continue; 11798c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner 11808c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner const Expr *E = ILE->getInit(ILEElement++); 11818c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner 11828c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner // Reference values are always non-null and have the width of a pointer. 11838c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner if (Field->getType()->isReferenceType()) 118402c45333b8310bb792a15f85f219706025f9752cKen Dyck NumNonZeroBytes += CGF.getContext().toCharUnitsFromBits( 1185bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor CGF.getContext().getTargetInfo().getPointerWidth(0)); 11868c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner else 11878c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner NumNonZeroBytes += GetNumNonZeroBytesInInit(E, CGF); 11888c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner } 1189d1d56df188e25c633f9bc65d229897b42442b0f7Chris Lattner 11908c00ad1e3897e8a00f41bbd52135be8390d5c15cChris Lattner return NumNonZeroBytes; 1191d1d56df188e25c633f9bc65d229897b42442b0f7Chris Lattner } 1192d1d56df188e25c633f9bc65d229897b42442b0f7Chris Lattner } 1193d1d56df188e25c633f9bc65d229897b42442b0f7Chris Lattner 1194d1d56df188e25c633f9bc65d229897b42442b0f7Chris Lattner 119502c45333b8310bb792a15f85f219706025f9752cKen Dyck CharUnits NumNonZeroBytes = CharUnits::Zero(); 11961b726771d00762fb5c4c2638e60d134c385493aeChris Lattner for (unsigned i = 0, e = ILE->getNumInits(); i != e; ++i) 11971b726771d00762fb5c4c2638e60d134c385493aeChris Lattner NumNonZeroBytes += GetNumNonZeroBytesInInit(ILE->getInit(i), CGF); 11981b726771d00762fb5c4c2638e60d134c385493aeChris Lattner return NumNonZeroBytes; 11991b726771d00762fb5c4c2638e60d134c385493aeChris Lattner} 12001b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 12011b726771d00762fb5c4c2638e60d134c385493aeChris Lattner/// CheckAggExprForMemSetUse - If the initializer is large and has a lot of 12021b726771d00762fb5c4c2638e60d134c385493aeChris Lattner/// zeros in it, emit a memset and avoid storing the individual zeros. 12031b726771d00762fb5c4c2638e60d134c385493aeChris Lattner/// 12041b726771d00762fb5c4c2638e60d134c385493aeChris Lattnerstatic void CheckAggExprForMemSetUse(AggValueSlot &Slot, const Expr *E, 12051b726771d00762fb5c4c2638e60d134c385493aeChris Lattner CodeGenFunction &CGF) { 12061b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // If the slot is already known to be zeroed, nothing to do. Don't mess with 12071b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // volatile stores. 12081b726771d00762fb5c4c2638e60d134c385493aeChris Lattner if (Slot.isZeroed() || Slot.isVolatile() || Slot.getAddr() == 0) return; 1209657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis 1210657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis // C++ objects with a user-declared constructor don't need zero'ing. 12114e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (CGF.getContext().getLangOpts().CPlusPlus) 1212657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis if (const RecordType *RT = CGF.getContext() 1213657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis .getBaseElementType(E->getType())->getAs<RecordType>()) { 1214657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis const CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 1215657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis if (RD->hasUserDeclaredConstructor()) 1216657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis return; 1217657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis } 1218657baf19ca8a48a926bd3bc148b6ad1b17e53199Argyrios Kyrtzidis 12191b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // If the type is 16-bytes or smaller, prefer individual stores over memset. 12205ff1a3508b39cfe3c9d108679a6532d85586b5ceKen Dyck std::pair<CharUnits, CharUnits> TypeInfo = 12215ff1a3508b39cfe3c9d108679a6532d85586b5ceKen Dyck CGF.getContext().getTypeInfoInChars(E->getType()); 12225ff1a3508b39cfe3c9d108679a6532d85586b5ceKen Dyck if (TypeInfo.first <= CharUnits::fromQuantity(16)) 12231b726771d00762fb5c4c2638e60d134c385493aeChris Lattner return; 12241b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 12251b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // Check to see if over 3/4 of the initializer are known to be zero. If so, 12261b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // we prefer to emit memset + individual stores for the rest. 12275ff1a3508b39cfe3c9d108679a6532d85586b5ceKen Dyck CharUnits NumNonZeroBytes = GetNumNonZeroBytesInInit(E, CGF); 12285ff1a3508b39cfe3c9d108679a6532d85586b5ceKen Dyck if (NumNonZeroBytes*4 > TypeInfo.first) 12291b726771d00762fb5c4c2638e60d134c385493aeChris Lattner return; 12301b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 12311b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // Okay, it seems like a good idea to use an initial memset, emit the call. 12325ff1a3508b39cfe3c9d108679a6532d85586b5ceKen Dyck llvm::Constant *SizeVal = CGF.Builder.getInt64(TypeInfo.first.getQuantity()); 12335ff1a3508b39cfe3c9d108679a6532d85586b5ceKen Dyck CharUnits Align = TypeInfo.second; 12341b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 12351b726771d00762fb5c4c2638e60d134c385493aeChris Lattner llvm::Value *Loc = Slot.getAddr(); 12361b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 12378b418685e9e4f02f4eb2a76e1ec063e07552b68dChris Lattner Loc = CGF.Builder.CreateBitCast(Loc, CGF.Int8PtrTy); 12385ff1a3508b39cfe3c9d108679a6532d85586b5ceKen Dyck CGF.Builder.CreateMemSet(Loc, CGF.Builder.getInt8(0), SizeVal, 12395ff1a3508b39cfe3c9d108679a6532d85586b5ceKen Dyck Align.getQuantity(), false); 12401b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 12411b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // Tell the AggExprEmitter that the slot is known zero. 12421b726771d00762fb5c4c2638e60d134c385493aeChris Lattner Slot.setZeroed(); 12431b726771d00762fb5c4c2638e60d134c385493aeChris Lattner} 12441b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 12451b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 12461b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 12471b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 1248e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// EmitAggExpr - Emit the computation of the specified expression of aggregate 1249e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// type. The result is computed into DestPtr. Note that if DestPtr is null, 1250e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// the value of the aggregate expression is not needed. If VolatileDest is 1251e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// true, DestPtr cannot be 0. 1252e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCallvoid CodeGenFunction::EmitAggExpr(const Expr *E, AggValueSlot Slot) { 1253ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner assert(E && hasAggregateLLVMType(E->getType()) && 1254ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner "Invalid aggregate expression to emit"); 12551b726771d00762fb5c4c2638e60d134c385493aeChris Lattner assert((Slot.getAddr() != 0 || Slot.isIgnored()) && 12561b726771d00762fb5c4c2638e60d134c385493aeChris Lattner "slot has bits but no address"); 12571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12581b726771d00762fb5c4c2638e60d134c385493aeChris Lattner // Optimize the slot if possible. 12591b726771d00762fb5c4c2638e60d134c385493aeChris Lattner CheckAggExprForMemSetUse(Slot, E, *this); 12601b726771d00762fb5c4c2638e60d134c385493aeChris Lattner 1261e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall AggExprEmitter(*this, Slot).Visit(const_cast<Expr*>(E)); 1262ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 12637482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 126418aba0dd518e486d8b50523e7dafb4b5657135d2Daniel DunbarLValue CodeGenFunction::EmitAggExprToLValue(const Expr *E) { 126518aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar assert(hasAggregateLLVMType(E->getType()) && "Invalid argument!"); 1266195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar llvm::Value *Temp = CreateMemTemp(E->getType()); 126779c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar LValue LV = MakeAddrLValue(Temp, E->getType()); 12687c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall EmitAggExpr(E, AggValueSlot::forLValue(LV, AggValueSlot::IsNotDestructed, 12694418439220a8f8e0b1deffdccce2354854c702f5John McCall AggValueSlot::DoesNotNeedGCBarriers, 1270649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier AggValueSlot::IsNotAliased)); 127179c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar return LV; 127218aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar} 127318aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar 1274649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosiervoid CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr, 1275649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier llvm::Value *SrcPtr, QualType Ty, 1276e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall bool isVolatile, 1277e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall CharUnits alignment) { 1278649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 12791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12804e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (getContext().getLangOpts().CPlusPlus) { 1281649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier if (const RecordType *RT = Ty->getAs<RecordType>()) { 1282649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier CXXRecordDecl *Record = cast<CXXRecordDecl>(RT->getDecl()); 1283649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier assert((Record->hasTrivialCopyConstructor() || 1284649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier Record->hasTrivialCopyAssignment() || 1285649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier Record->hasTrivialMoveConstructor() || 1286649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier Record->hasTrivialMoveAssignment()) && 1287e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor "Trying to aggregate-copy a type without a trivial copy " 1288e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor "constructor or assignment operator"); 1289649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // Ignore empty classes in C++. 1290649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier if (Record->isEmpty()) 12910d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson return; 12920d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson } 12930d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson } 12940d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson 1295649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // Aggregate assignment turns into llvm.memcpy. This is almost valid per 1296649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // C99 6.5.16.1p3, which states "If the value being stored in an object is 1297649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // read from another object that overlaps in anyway the storage of the first 1298649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // object, then the overlap shall be exact and the two objects shall have 1299649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // qualified or unqualified versions of a compatible type." 1300649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // 1301649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // memcpy is not defined if the source and destination pointers are exactly 1302649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // equal, but other compilers do this optimization, and almost every memcpy 1303649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // implementation handles this case safely. If there is a libc that does not 1304649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // safely handle this, we can add a target hook. 1305649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier 1306929bbfb0b69165b55da3c56abf22aa10e20dadc6John McCall // Get data size and alignment info for this aggregate. 1307649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier std::pair<CharUnits, CharUnits> TypeInfo = 1308929bbfb0b69165b55da3c56abf22aa10e20dadc6John McCall getContext().getTypeInfoDataSizeInChars(Ty); 1309649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier 1310e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall if (alignment.isZero()) 1311e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall alignment = TypeInfo.second; 1312649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier 1313649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // FIXME: Handle variable sized types. 1314649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier 1315649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // FIXME: If we have a volatile struct, the optimizer can remove what might 1316649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // appear to be `extra' memory ops: 1317649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // 1318649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // volatile struct { int i; } a, b; 1319649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // 1320649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // int main() { 1321649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // a = b; 1322649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // a = b; 1323649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // } 1324649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // 1325649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // we need to use a different call here. We use isVolatile to indicate when 1326649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier // either the source or the destination is volatile. 1327649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier 1328649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier llvm::PointerType *DPT = cast<llvm::PointerType>(DestPtr->getType()); 13292acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DBP = 1330d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall llvm::Type::getInt8PtrTy(getLLVMContext(), DPT->getAddressSpace()); 1331649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier DestPtr = Builder.CreateBitCast(DestPtr, DBP); 13323ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 1333649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier llvm::PointerType *SPT = cast<llvm::PointerType>(SrcPtr->getType()); 13342acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *SBP = 1335d16c2cf1cafa413709aa487cbbd5dc392f1ba1ffJohn McCall llvm::Type::getInt8PtrTy(getLLVMContext(), SPT->getAddressSpace()); 1336649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier SrcPtr = Builder.CreateBitCast(SrcPtr, SBP); 13373ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 1338f85e193739c953358c865005855253af4f68a497John McCall // Don't do any of the memmove_collectable tests if GC isn't set. 13394e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (CGM.getLangOpts().getGC() == LangOptions::NonGC) { 1340f85e193739c953358c865005855253af4f68a497John McCall // fall through 1341649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier } else if (const RecordType *RecordTy = Ty->getAs<RecordType>()) { 1342649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier RecordDecl *Record = RecordTy->getDecl(); 1343649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier if (Record->hasObjectMember()) { 1344649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier CharUnits size = TypeInfo.first; 1345649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier llvm::Type *SizeTy = ConvertType(getContext().getSizeType()); 1346649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier llvm::Value *SizeVal = llvm::ConstantInt::get(SizeTy, size.getQuantity()); 1347649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier CGM.getObjCRuntime().EmitGCMemmoveCollectable(*this, DestPtr, SrcPtr, 1348649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier SizeVal); 134955bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian return; 135055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 1351649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier } else if (Ty->isArrayType()) { 1352649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier QualType BaseType = getContext().getBaseElementType(Ty); 1353649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier if (const RecordType *RecordTy = BaseType->getAs<RecordType>()) { 1354649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier if (RecordTy->getDecl()->hasObjectMember()) { 1355649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier CharUnits size = TypeInfo.first; 1356649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier llvm::Type *SizeTy = ConvertType(getContext().getSizeType()); 1357649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier llvm::Value *SizeVal = 1358649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier llvm::ConstantInt::get(SizeTy, size.getQuantity()); 1359649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier CGM.getObjCRuntime().EmitGCMemmoveCollectable(*this, DestPtr, SrcPtr, 1360649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier SizeVal); 136155bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian return; 136255bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 136355bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 136455bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 136555bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian 1366649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier Builder.CreateMemCpy(DestPtr, SrcPtr, 1367649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier llvm::ConstantInt::get(IntPtrTy, 1368649b4a1a9b5e6f768ca0cb84bd97b00f51083e15Chad Rosier TypeInfo.first.getQuantity()), 1369e0c1168ec7910a1a7ed08df4d4f0c58c2fa2ecd1John McCall alignment.getQuantity(), isVolatile); 13707482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 137132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 1372972edf0534d8a50f87fac1d0ff34eb22f593df11Sebastian Redlvoid CodeGenFunction::MaybeEmitStdInitializerListCleanup(llvm::Value *loc, 1373972edf0534d8a50f87fac1d0ff34eb22f593df11Sebastian Redl const Expr *init) { 137432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl const ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(init); 1375972edf0534d8a50f87fac1d0ff34eb22f593df11Sebastian Redl if (cleanups) 1376972edf0534d8a50f87fac1d0ff34eb22f593df11Sebastian Redl init = cleanups->getSubExpr(); 137732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 137832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl if (isa<InitListExpr>(init) && 137932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl cast<InitListExpr>(init)->initializesStdInitializerList()) { 138032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // We initialized this std::initializer_list with an initializer list. 138132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // A backing array was created. Push a cleanup for it. 1382972edf0534d8a50f87fac1d0ff34eb22f593df11Sebastian Redl EmitStdInitializerListCleanup(loc, cast<InitListExpr>(init)); 1383af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl } 1384af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl} 1385af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl 1386af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redlstatic void EmitRecursiveStdInitializerListCleanup(CodeGenFunction &CGF, 1387af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl llvm::Value *arrayStart, 1388af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl const InitListExpr *init) { 1389af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl // Check if there are any recursive cleanups to do, i.e. if we have 1390af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl // std::initializer_list<std::initializer_list<obj>> list = {{obj()}}; 1391af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl // then we need to destroy the inner array as well. 1392af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl for (unsigned i = 0, e = init->getNumInits(); i != e; ++i) { 1393af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl const InitListExpr *subInit = dyn_cast<InitListExpr>(init->getInit(i)); 1394af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl if (!subInit || !subInit->initializesStdInitializerList()) 1395af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl continue; 1396af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl 1397af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl // This one needs to be destroyed. Get the address of the std::init_list. 1398af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl llvm::Value *offset = llvm::ConstantInt::get(CGF.SizeTy, i); 1399af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl llvm::Value *loc = CGF.Builder.CreateInBoundsGEP(arrayStart, offset, 1400af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl "std.initlist"); 1401af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl CGF.EmitStdInitializerListCleanup(loc, subInit); 140232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl } 140332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl} 140432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 1405af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redlvoid CodeGenFunction::EmitStdInitializerListCleanup(llvm::Value *loc, 140632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl const InitListExpr *init) { 140732cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl ASTContext &ctx = getContext(); 140832cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl QualType element = GetStdInitializerListElementType(init->getType()); 140932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl unsigned numInits = init->getNumInits(); 141032cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::APInt size(ctx.getTypeSize(ctx.getSizeType()), numInits); 141132cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl QualType array =ctx.getConstantArrayType(element, size, ArrayType::Normal, 0); 141232cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl QualType arrayPtr = ctx.getPointerType(array); 141332cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl llvm::Type *arrayPtrType = ConvertType(arrayPtr); 141432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 141532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // lvalue is the location of a std::initializer_list, which as its first 141632cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl // element has a pointer to the array we want to destroy. 1417af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl llvm::Value *startPointer = Builder.CreateStructGEP(loc, 0, "startPointer"); 1418af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl llvm::Value *startAddress = Builder.CreateLoad(startPointer, "startAddress"); 141932cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl 1420af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl ::EmitRecursiveStdInitializerListCleanup(*this, startAddress, init); 1421af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl 1422af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl llvm::Value *arrayAddress = 1423af130fd78267ee9e2395b758a7d827b07ce317a0Sebastian Redl Builder.CreateBitCast(startAddress, arrayPtrType, "arrayAddress"); 142432cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl ::EmitStdInitializerListCleanup(*this, array, arrayAddress, init); 142532cf1f27ae8620e7b79bb4e81a067187c0aab7aeSebastian Redl} 1426