CGExprAgg.cpp revision 55bcace250e1ff366e4482714b344b8cbc8be5f3
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" 19de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/StmtVisitor.h" 20883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner#include "llvm/Constants.h" 21883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner#include "llvm/Function.h" 22636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel#include "llvm/GlobalVariable.h" 23f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner#include "llvm/Intrinsics.h" 24af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattnerusing namespace clang; 25af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattnerusing namespace CodeGen; 26883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 279c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner//===----------------------------------------------------------------------===// 289c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner// Aggregate Expression Emitter 299c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner//===----------------------------------------------------------------------===// 309c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 319c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnernamespace { 3285b4521e34dcd4a0a4a1f0819e1123128e5a3125Benjamin Kramerclass AggExprEmitter : public StmtVisitor<AggExprEmitter> { 339c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CodeGenFunction &CGF; 3445d196b8387dcefc4df26cda114fa34c6528e928Daniel Dunbar CGBuilderTy &Builder; 359c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner llvm::Value *DestPtr; 369c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner bool VolatileDest; 3749d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump bool IgnoreResult; 3814c5cbf59cffee52275230922283a247de407712Anders Carlsson bool IsInitializer; 3908c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection; 40ef072fd2f3347cfd857d6eb787b245b950771430John McCall 41ef072fd2f3347cfd857d6eb787b245b950771430John McCall ReturnValueSlot getReturnValueSlot() const { 42fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // If the destination slot requires garbage collection, we can't 43fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // use the real return value slot, because we have to use the GC 44fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // API. 45fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall if (RequiresGCollection) return ReturnValueSlot(); 46fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 47ef072fd2f3347cfd857d6eb787b245b950771430John McCall return ReturnValueSlot(DestPtr, VolatileDest); 48ef072fd2f3347cfd857d6eb787b245b950771430John McCall } 49fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 509c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnerpublic: 51ff4bf3bd6174f6a02da4ee2efc6064c005295d44Mike Stump AggExprEmitter(CodeGenFunction &cgf, llvm::Value *destPtr, bool v, 5208c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool ignore, bool isinit, bool requiresGCollection) 53bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner : CGF(cgf), Builder(CGF.Builder), 5414c5cbf59cffee52275230922283a247de407712Anders Carlsson DestPtr(destPtr), VolatileDest(v), IgnoreResult(ignore), 5508c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian IsInitializer(isinit), RequiresGCollection(requiresGCollection) { 569c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner } 579c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 58ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 59ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner // Utilities 60ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 61ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 629c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// EmitAggLoadOfLValue - Given an expression with aggregate type that 639c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// represents a value lvalue, this method emits the address of the lvalue, 649c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// then loads the result into DestPtr. 659c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void EmitAggLoadOfLValue(const Expr *E); 66922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 674ac20ddc7ab324a59862657f756bdd060076b137Mike Stump /// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 6849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump void EmitFinalDestCopy(const Expr *E, LValue Src, bool Ignore = false); 6949d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump void EmitFinalDestCopy(const Expr *E, RValue Src, bool Ignore = false); 704ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 71fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall void EmitGCMove(const Expr *E, RValue Src); 72fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 73fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall bool TypeRequiresGCollection(QualType T); 74fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 75ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 76ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner // Visitor Methods 77ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 799c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitStmt(Stmt *S) { 80488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar CGF.ErrorUnsupported(S, "aggregate expression"); 819c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner } 829c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitParenExpr(ParenExpr *PE) { Visit(PE->getSubExpr()); } 8312444a24419fe88b42a16b46106db3c11ac5cd35Eli Friedman void VisitUnaryExtension(UnaryOperator *E) { Visit(E->getSubExpr()); } 849c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 859c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // l-values. 869b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitDeclRefExpr(DeclRefExpr *DRE) { EmitAggLoadOfLValue(DRE); } 879b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitMemberExpr(MemberExpr *ME) { EmitAggLoadOfLValue(ME); } 889b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitUnaryDeref(UnaryOperator *E) { EmitAggLoadOfLValue(E); } 895be028f84243e0f6906c259e67cbdaf9bee431b2Daniel Dunbar void VisitStringLiteral(StringLiteral *E) { EmitAggLoadOfLValue(E); } 90f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump EmitAggLoadOfLValue(E); 92f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 939b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 949b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon EmitAggLoadOfLValue(E); 959b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon } 96f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitBlockDeclRefExpr(const BlockDeclRefExpr *E) { 971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump EmitAggLoadOfLValue(E); 98f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 99f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitPredefinedExpr(const PredefinedExpr *E) { 1001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump EmitAggLoadOfLValue(E); 101f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 1021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1039c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // Operators. 1044d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson void VisitCastExpr(CastExpr *E); 105148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson void VisitCallExpr(const CallExpr *E); 106b2d963f527674275c9109252474948368b6e6161Chris Lattner void VisitStmtExpr(const StmtExpr *E); 1079c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitBinaryOperator(const BinaryOperator *BO); 1088bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian void VisitPointerToDataMemberBinaryOperator(const BinaryOperator *BO); 10903d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattner void VisitBinAssign(const BinaryOperator *E); 11007fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman void VisitBinComma(const BinaryOperator *E); 111a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson void VisitUnaryAddrOf(const UnaryOperator *E); 1129c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 1138fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner void VisitObjCMessageExpr(ObjCMessageExpr *E); 1140a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar void VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { 1150a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar EmitAggLoadOfLValue(E); 1160a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar } 1179c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar void VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E); 11809105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian void VisitObjCImplicitSetterGetterRefExpr(ObjCImplicitSetterGetterRefExpr *E); 1191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1209c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitConditionalOperator(const ConditionalOperator *CO); 121a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson void VisitChooseExpr(const ChooseExpr *CE); 122636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel void VisitInitListExpr(InitListExpr *E); 12330311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson void VisitImplicitValueInitExpr(ImplicitValueInitExpr *E); 12404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { 12504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Visit(DAE->getExpr()); 12604421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner } 127b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E); 12831ccf377f4a676eb6c205b47eef435de616d5e2dAnders Carlsson void VisitCXXConstructExpr(const CXXConstructExpr *E); 1297f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson void VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E); 130329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes void VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E); 1312710c4159ff4761ba9867aca18f60a178b297686Mike Stump void VisitCXXTypeidExpr(CXXTypeidExpr *E) { EmitAggLoadOfLValue(E); } 1327f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 133b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman void VisitVAArgExpr(VAArgExpr *E); 134f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 13578e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson void EmitInitializationToLValue(Expr *E, LValue Address, QualType T); 136f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitNullInitializationToLValue(LValue Address, QualType T); 1379c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // case Expr::ChooseExprClass: 13839406b1395f69341c045e863a6620310abdc55b6Mike Stump void VisitCXXThrowExpr(const CXXThrowExpr *E) { CGF.EmitCXXThrowExpr(E); } 1399c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner}; 1409c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner} // end anonymous namespace. 1419c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 142ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 143ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Utilities 144ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 1459c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 146883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// EmitAggLoadOfLValue - Given an expression with aggregate type that 147883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// represents a value lvalue, this method emits the address of the lvalue, 148883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// then loads the result into DestPtr. 1499c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::EmitAggLoadOfLValue(const Expr *E) { 1509c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LV = CGF.EmitLValue(E); 1514ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, LV); 1524ac20ddc7ab324a59862657f756bdd060076b137Mike Stump} 1534ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 154fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// \brief True if the given aggregate type requires special GC API calls. 155fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCallbool AggExprEmitter::TypeRequiresGCollection(QualType T) { 156fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // Only record types have members that might require garbage collection. 157fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall const RecordType *RecordTy = T->getAs<RecordType>(); 158fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall if (!RecordTy) return false; 159fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 160fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // Don't mess with non-trivial C++ types. 161fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RecordDecl *Record = RecordTy->getDecl(); 162fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall if (isa<CXXRecordDecl>(Record) && 163fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall (!cast<CXXRecordDecl>(Record)->hasTrivialCopyConstructor() || 164fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall !cast<CXXRecordDecl>(Record)->hasTrivialDestructor())) 165fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall return false; 166fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 167fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // Check whether the type has an object member. 168fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall return Record->hasObjectMember(); 169fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall} 170fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 171fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// \brief Perform the final move to DestPtr if RequiresGCollection is set. 172fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// 173fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// The idea is that you do something like this: 174fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// RValue Result = EmitSomething(..., getReturnValueSlot()); 175fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// EmitGCMove(E, Result); 176fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// If GC doesn't interfere, this will cause the result to be emitted 177fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// directly into the return value slot. If GC does interfere, a final 178fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// move will be performed. 179fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCallvoid AggExprEmitter::EmitGCMove(const Expr *E, RValue Src) { 18055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian if (RequiresGCollection) { 18155bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian std::pair<uint64_t, unsigned> TypeInfo = 18255bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian CGF.getContext().getTypeInfo(E->getType()); 18355bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian unsigned long size = TypeInfo.first/8; 18455bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian const llvm::Type *SizeTy = CGF.ConvertType(CGF.getContext().getSizeType()); 18555bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian llvm::Value *SizeVal = llvm::ConstantInt::get(SizeTy, size); 18655bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian CGF.CGM.getObjCRuntime().EmitGCMemmoveCollectable(CGF, DestPtr, 187fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall Src.getAggregateAddr(), 18855bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian SizeVal); 18955bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 190fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall} 191fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 1924ac20ddc7ab324a59862657f756bdd060076b137Mike Stump/// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 19349d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stumpvoid AggExprEmitter::EmitFinalDestCopy(const Expr *E, RValue Src, bool Ignore) { 1944ac20ddc7ab324a59862657f756bdd060076b137Mike Stump assert(Src.isAggregate() && "value must be aggregate value!"); 1954ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 196883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // If the result is ignored, don't copy from the value. 1979ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump if (DestPtr == 0) { 19849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump if (!Src.isVolatileQualified() || (IgnoreResult && Ignore)) 1999ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump return; 20049d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // If the source is volatile, we must read from it; to do that, we need 20149d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // some place to put it. 202195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar DestPtr = CGF.CreateMemTemp(E->getType(), "agg.tmp"); 2039ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump } 204883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 20508c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian if (RequiresGCollection) { 20655bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian std::pair<uint64_t, unsigned> TypeInfo = 20755bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian CGF.getContext().getTypeInfo(E->getType()); 20855bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian unsigned long size = TypeInfo.first/8; 20955bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian const llvm::Type *SizeTy = CGF.ConvertType(CGF.getContext().getSizeType()); 21055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian llvm::Value *SizeVal = llvm::ConstantInt::get(SizeTy, size); 21108c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian CGF.CGM.getObjCRuntime().EmitGCMemmoveCollectable(CGF, 21208c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian DestPtr, Src.getAggregateAddr(), 21355bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian SizeVal); 21408c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian return; 21508c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian } 2164ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // If the result of the assignment is used, copy the LHS there also. 2174ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // FIXME: Pass VolatileDest as well. I think we also need to merge volatile 2184ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // from the source as well, as we can't eliminate it if either operand 2194ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // is volatile, unless copy has volatile for both source and destination.. 22027fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump CGF.EmitAggregateCopy(DestPtr, Src.getAggregateAddr(), E->getType(), 22127fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump VolatileDest|Src.isVolatileQualified()); 2224ac20ddc7ab324a59862657f756bdd060076b137Mike Stump} 2234ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 2244ac20ddc7ab324a59862657f756bdd060076b137Mike Stump/// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 22549d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stumpvoid AggExprEmitter::EmitFinalDestCopy(const Expr *E, LValue Src, bool Ignore) { 2264ac20ddc7ab324a59862657f756bdd060076b137Mike Stump assert(Src.isSimple() && "Can't have aggregate bitfield, vector, etc"); 2274ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 2284ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RValue::getAggregate(Src.getAddress(), 22949d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump Src.isVolatileQualified()), 23049d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump Ignore); 231883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 232883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 233ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 234ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Visitor Methods 235ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 236ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 2374d8673b645ad86e496b886a0f80b60763f67071dAnders Carlssonvoid AggExprEmitter::VisitCastExpr(CastExpr *E) { 23869cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor if (!DestPtr && E->getCastKind() != CastExpr::CK_Dynamic) { 2394ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor Visit(E->getSubExpr()); 2404ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor return; 2414ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor } 2424ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor 2433016842613674ab80796567239c15d529aff1458Anders Carlsson switch (E->getCastKind()) { 2443016842613674ab80796567239c15d529aff1458Anders Carlsson default: assert(0 && "Unhandled cast kind!"); 2453016842613674ab80796567239c15d529aff1458Anders Carlsson 24669cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor case CastExpr::CK_Dynamic: { 24769cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor assert(isa<CXXDynamicCastExpr>(E) && "CK_Dynamic without a dynamic_cast?"); 24869cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor LValue LV = CGF.EmitCheckedLValue(E->getSubExpr()); 24969cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor // FIXME: Do we also need to handle property references here? 25069cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor if (LV.isSimple()) 25169cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor CGF.EmitDynamicCast(LV.getAddress(), cast<CXXDynamicCastExpr>(E)); 25269cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor else 25369cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor CGF.CGM.ErrorUnsupported(E, "non-simple lvalue dynamic_cast"); 25469cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor 25569cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor if (DestPtr) 25669cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor CGF.CGM.ErrorUnsupported(E, "lvalue dynamic_cast with a destination"); 25769cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor break; 25869cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor } 25969cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor 2603016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_ToUnion: { 2614d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // GCC union extension 26234ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman QualType PtrTy = 2633016842613674ab80796567239c15d529aff1458Anders Carlsson CGF.getContext().getPointerType(E->getSubExpr()->getType()); 26434ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman llvm::Value *CastPtr = Builder.CreateBitCast(DestPtr, 26534ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman CGF.ConvertType(PtrTy)); 266c6a38a47bf3908ab2183d7946498138d8b07c886Mon P Wang EmitInitializationToLValue(E->getSubExpr(), 26778e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson LValue::MakeAddr(CastPtr, Qualifiers()), 26818da88a38b82132faa7794120e17352dfacc5155Eli Friedman E->getSubExpr()->getType()); 2693016842613674ab80796567239c15d529aff1458Anders Carlsson break; 2707e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes } 2711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2722d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor case CastExpr::CK_DerivedToBase: 2732d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor case CastExpr::CK_BaseToDerived: 2742d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor case CastExpr::CK_UncheckedDerivedToBase: { 2752d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor assert(0 && "cannot perform hierarchy conversion in EmitAggExpr: " 2762d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor "should have been unpacked before we got here"); 2772d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor break; 2782d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor } 2792d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor 2804d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // FIXME: Remove the CK_Unknown check here. 2813016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_Unknown: 2823016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_NoOp: 2833016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_UserDefinedConversion: 2843016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_ConstructorConversion: 2853016842613674ab80796567239c15d529aff1458Anders Carlsson assert(CGF.getContext().hasSameUnqualifiedType(E->getSubExpr()->getType(), 2863016842613674ab80796567239c15d529aff1458Anders Carlsson E->getType()) && 2873016842613674ab80796567239c15d529aff1458Anders Carlsson "Implicit cast types must be compatible"); 2883016842613674ab80796567239c15d529aff1458Anders Carlsson Visit(E->getSubExpr()); 2893016842613674ab80796567239c15d529aff1458Anders Carlsson break; 290e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 291e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson case CastExpr::CK_NullToMemberPointer: { 2924ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor // If the subexpression's type is the C++0x nullptr_t, emit the 2934ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor // subexpression, which may have side effects. 2944ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor if (E->getSubExpr()->getType()->isNullPtrType()) 2954ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor Visit(E->getSubExpr()); 2964ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor 297e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson const llvm::Type *PtrDiffTy = 298e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 299e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 300e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *NullValue = llvm::Constant::getNullValue(PtrDiffTy); 301e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *Ptr = Builder.CreateStructGEP(DestPtr, 0, "ptr"); 302e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson Builder.CreateStore(NullValue, Ptr, VolatileDest); 303e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 304e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *Adj = Builder.CreateStructGEP(DestPtr, 1, "adj"); 305e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson Builder.CreateStore(NullValue, Adj, VolatileDest); 306e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 307e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson break; 308e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson } 30984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 310bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson case CastExpr::CK_BitCast: { 311bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson // This must be a member function pointer cast. 312bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson Visit(E->getSubExpr()); 313bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson break; 314bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson } 315bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson 316c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman case CastExpr::CK_DerivedToBaseMemberPointer: 31784080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson case CastExpr::CK_BaseToDerivedMemberPointer: { 31884080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson QualType SrcType = E->getSubExpr()->getType(); 31984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 320195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar llvm::Value *Src = CGF.CreateMemTemp(SrcType, "tmp"); 32184080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson CGF.EmitAggExpr(E->getSubExpr(), Src, SrcType.isVolatileQualified()); 32284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 32384080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *SrcPtr = Builder.CreateStructGEP(Src, 0, "src.ptr"); 32484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson SrcPtr = Builder.CreateLoad(SrcPtr); 32584080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 32684080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *SrcAdj = Builder.CreateStructGEP(Src, 1, "src.adj"); 32784080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson SrcAdj = Builder.CreateLoad(SrcAdj); 32884080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 32984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *DstPtr = Builder.CreateStructGEP(DestPtr, 0, "dst.ptr"); 33084080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson Builder.CreateStore(SrcPtr, DstPtr, VolatileDest); 33184080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 33284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *DstAdj = Builder.CreateStructGEP(DestPtr, 1, "dst.adj"); 33384080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 33484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson // Now See if we need to update the adjustment. 335c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman const CXXRecordDecl *BaseDecl = 33684080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson cast<CXXRecordDecl>(SrcType->getAs<MemberPointerType>()-> 33784080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson getClass()->getAs<RecordType>()->getDecl()); 338c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman const CXXRecordDecl *DerivedDecl = 33984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson cast<CXXRecordDecl>(E->getType()->getAs<MemberPointerType>()-> 34084080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson getClass()->getAs<RecordType>()->getDecl()); 341c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman if (E->getCastKind() == CastExpr::CK_DerivedToBaseMemberPointer) 342c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman std::swap(DerivedDecl, BaseDecl); 343c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman 344bb7e17b52ffaa4097b4c4d7935746d23539ffe2aAnders Carlsson if (llvm::Constant *Adj = 345e04d45e05277ee04997fe59b1d194503f484c846Anders Carlsson CGF.CGM.GetNonVirtualBaseClassOffset(DerivedDecl, E->getBasePath())) { 346c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman if (E->getCastKind() == CastExpr::CK_DerivedToBaseMemberPointer) 347c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman SrcAdj = Builder.CreateSub(SrcAdj, Adj, "adj"); 348c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman else 349c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman SrcAdj = Builder.CreateAdd(SrcAdj, Adj, "adj"); 350c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman } 35184080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 35284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson Builder.CreateStore(SrcAdj, DstAdj, VolatileDest); 35384080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson break; 35484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson } 3553016842613674ab80796567239c15d529aff1458Anders Carlsson } 356e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson} 357e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson 3589619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitCallExpr(const CallExpr *E) { 359e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson if (E->getCallReturnType()->isReferenceType()) { 360e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson EmitAggLoadOfLValue(E); 361e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson return; 362e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson } 3631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 364fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RValue RV = CGF.EmitCallExpr(E, getReturnValueSlot()); 365fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall EmitGCMove(E, RV); 366796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman} 3679619662a1d42e2008b865d3459c0677e149dad1bChris Lattner 3689619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) { 369fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RValue RV = CGF.EmitObjCMessageExpr(E, getReturnValueSlot()); 370fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall EmitGCMove(E, RV); 3718fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 372796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 3739c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbarvoid AggExprEmitter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 374fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RValue RV = CGF.EmitObjCPropertyGet(E, getReturnValueSlot()); 375fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall EmitGCMove(E, RV); 3765daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian} 3775daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 37809105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanianvoid AggExprEmitter::VisitObjCImplicitSetterGetterRefExpr( 37909105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian ObjCImplicitSetterGetterRefExpr *E) { 380fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RValue RV = CGF.EmitObjCPropertyGet(E, getReturnValueSlot()); 381fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall EmitGCMove(E, RV); 382148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson} 383148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 3849619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitBinComma(const BinaryOperator *E) { 3857f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitAnyExpr(E->getLHS(), 0, false, true); 38614c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.EmitAggExpr(E->getRHS(), DestPtr, VolatileDest, 38714c5cbf59cffee52275230922283a247de407712Anders Carlsson /*IgnoreResult=*/false, IsInitializer); 38807fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman} 38907fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman 390a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlssonvoid AggExprEmitter::VisitUnaryAddrOf(const UnaryOperator *E) { 391a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson // We have a member function pointer. 392a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson const MemberPointerType *MPT = E->getType()->getAs<MemberPointerType>(); 393babac13bb332974c8bb800b1a9714bcdf5afefccDaniel Dunbar (void) MPT; 394a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson assert(MPT->getPointeeType()->isFunctionProtoType() && 395a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson "Unexpected member pointer type!"); 396e174bd05ca9991e705f51afcfab27933b537dc63Douglas Gregor 397e174bd05ca9991e705f51afcfab27933b537dc63Douglas Gregor // The creation of member function pointers has no side effects; if 398e174bd05ca9991e705f51afcfab27933b537dc63Douglas Gregor // there is no destination pointer, we have nothing to do. 399e174bd05ca9991e705f51afcfab27933b537dc63Douglas Gregor if (!DestPtr) 400e174bd05ca9991e705f51afcfab27933b537dc63Douglas Gregor return; 401a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 402a2813cec2605ce7878d1b13471d685f689b251afDouglas Gregor const DeclRefExpr *DRE = cast<DeclRefExpr>(E->getSubExpr()); 4037af4ec744e30d573482aef7a37089d0d32cc07efAnders Carlsson const CXXMethodDecl *MD = 4047af4ec744e30d573482aef7a37089d0d32cc07efAnders Carlsson cast<CXXMethodDecl>(DRE->getDecl())->getCanonicalDecl(); 405a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 406a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson const llvm::Type *PtrDiffTy = 407a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 408a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 409a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *DstPtr = Builder.CreateStructGEP(DestPtr, 0, "dst.ptr"); 410c00129a08c829bb34f22dc13727043c994c85644Eli Friedman llvm::Value *FuncPtr = CGF.CGM.GetCXXMemberFunctionPointerValue(MD); 411a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson Builder.CreateStore(FuncPtr, DstPtr, VolatileDest); 412a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 413a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *AdjPtr = Builder.CreateStructGEP(DestPtr, 1, "dst.adj"); 414a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson // The adjustment will always be 0. 415a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson Builder.CreateStore(llvm::ConstantInt::get(PtrDiffTy, 0), AdjPtr, 416a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson VolatileDest); 417a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson} 418a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 419b2d963f527674275c9109252474948368b6e6161Chris Lattnervoid AggExprEmitter::VisitStmtExpr(const StmtExpr *E) { 420b2d963f527674275c9109252474948368b6e6161Chris Lattner CGF.EmitCompoundStmt(*E->getSubStmt(), true, DestPtr, VolatileDest); 421b2d963f527674275c9109252474948368b6e6161Chris Lattner} 422b2d963f527674275c9109252474948368b6e6161Chris Lattner 4239c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitBinaryOperator(const BinaryOperator *E) { 42452f08bcbb81c750ed62b53ed0b34aff16143b877Fariborz Jahanian if (E->getOpcode() == BinaryOperator::PtrMemD || 42552f08bcbb81c750ed62b53ed0b34aff16143b877Fariborz Jahanian E->getOpcode() == BinaryOperator::PtrMemI) 4268bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian VisitPointerToDataMemberBinaryOperator(E); 4278bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian else 4288bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian CGF.ErrorUnsupported(E, "aggregate binary expression"); 4298bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian} 4308bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian 4318bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanianvoid AggExprEmitter::VisitPointerToDataMemberBinaryOperator( 4328bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian const BinaryOperator *E) { 4338bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian LValue LV = CGF.EmitPointerToDataMemberBinaryExpr(E); 4348bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian EmitFinalDestCopy(E, LV); 435ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 436ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 43703d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattnervoid AggExprEmitter::VisitBinAssign(const BinaryOperator *E) { 438ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // For an assignment to work, the value on the right has 439ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // to be compatible with the value on the left. 4402dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(), 4412dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman E->getRHS()->getType()) 442ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman && "Invalid assignment"); 4439c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LHS = CGF.EmitLValue(E->getLHS()); 444883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 4457f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // We have to special case property setters, otherwise we must have 4467f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // a simple lvalue (no aggregates inside vectors, bitfields). 4477f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (LHS.isPropertyRef()) { 4487f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar llvm::Value *AggLoc = DestPtr; 4497f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (!AggLoc) 450195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar AggLoc = CGF.CreateMemTemp(E->getRHS()->getType()); 451240993d17d2b51c78d52df8743bdee4177960341Mike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 4521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), 453240993d17d2b51c78d52df8743bdee4177960341Mike Stump RValue::getAggregate(AggLoc, VolatileDest)); 454b3589f44c5d295cd41de2c83f3475116835eeebdMike Stump } else if (LHS.isKVCRef()) { 45543f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian llvm::Value *AggLoc = DestPtr; 45643f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian if (!AggLoc) 457195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar AggLoc = CGF.CreateMemTemp(E->getRHS()->getType()); 458a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 4591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CGF.EmitObjCPropertySet(LHS.getKVCRefExpr(), 460a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump RValue::getAggregate(AggLoc, VolatileDest)); 4617f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } else { 46208c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection = false; 463fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall if (CGF.getContext().getLangOptions().getGCMode()) 464fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RequiresGCollection = TypeRequiresGCollection(E->getLHS()->getType()); 465fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 4667f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // Codegen the RHS so that it stores directly into the LHS. 46708c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian CGF.EmitAggExpr(E->getRHS(), LHS.getAddress(), LHS.isVolatileQualified(), 46808c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian false, false, RequiresGCollection); 46949d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump EmitFinalDestCopy(E, LHS, true); 4707f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } 471883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 472883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 4739c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitConditionalOperator(const ConditionalOperator *E) { 4748e274bd14bcca8466542477844b88e90e90cde1aEli Friedman if (!E->getLHS()) { 4758e274bd14bcca8466542477844b88e90e90cde1aEli Friedman CGF.ErrorUnsupported(E, "conditional operator with missing LHS"); 4768e274bd14bcca8466542477844b88e90e90cde1aEli Friedman return; 4778e274bd14bcca8466542477844b88e90e90cde1aEli Friedman } 4788e274bd14bcca8466542477844b88e90e90cde1aEli Friedman 4799615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 4809615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 4819615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 4821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4838e274bd14bcca8466542477844b88e90e90cde1aEli Friedman CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock); 4841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 48572119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.BeginConditionalBranch(); 4869c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(LHSBlock); 4871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 488883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // Handle the GNU extension for missing LHS. 489883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(E->getLHS() && "Must have LHS for aggregate value"); 490883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 491c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getLHS()); 49272119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.EndConditionalBranch(); 493d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 4941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 49572119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.BeginConditionalBranch(); 4969c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(RHSBlock); 4971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 498c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getRHS()); 49972119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.EndConditionalBranch(); 500d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 5011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5029c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(ContBlock); 503883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 504ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 505a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlssonvoid AggExprEmitter::VisitChooseExpr(const ChooseExpr *CE) { 506a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson Visit(CE->getChosenSubExpr(CGF.getContext())); 507a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson} 508a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson 509b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedmanvoid AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 5100785570af3ef5f8c5a0377129e41efe6f3f8d770Daniel Dunbar llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); 511ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 512ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 5130262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl if (!ArgPtr) { 514ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.ErrorUnsupported(VE, "aggregate va_arg expression"); 5150262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl return; 5160262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl } 5170262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl 5180953e767ff7817f97b3ab20896b229891eeff45bJohn McCall EmitFinalDestCopy(VE, LValue::MakeAddr(ArgPtr, Qualifiers())); 519b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman} 520b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman 521b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlssonvoid AggExprEmitter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { 522b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 5231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 524b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 525b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 526195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 527b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 528b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // FIXME: volatile 529b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitAggExpr(E->getSubExpr(), Val, false); 5301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 531b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Visit(E->getSubExpr()); 5321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 53314c5cbf59cffee52275230922283a247de407712Anders Carlsson // Don't make this a live temporary if we're emitting an initializer expr. 53414c5cbf59cffee52275230922283a247de407712Anders Carlsson if (!IsInitializer) 53514c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.PushCXXTemporary(E->getTemporary(), Val); 536b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson} 537b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 538b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlssonvoid 53931ccf377f4a676eb6c205b47eef435de616d5e2dAnders CarlssonAggExprEmitter::VisitCXXConstructExpr(const CXXConstructExpr *E) { 540b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 5411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 542b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 543b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 544195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 545b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson } 5468e587a15da6d3457a418239d5eb4146fcbd209f3Anders Carlsson 54716006c901315fa12a108b4e571f187f4b676e426Douglas Gregor if (E->requiresZeroInitialization()) 54816006c901315fa12a108b4e571f187f4b676e426Douglas Gregor EmitNullInitializationToLValue(LValue::MakeAddr(Val, 549dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // FIXME: Qualifiers()? 55016006c901315fa12a108b4e571f187f4b676e426Douglas Gregor E->getType().getQualifiers()), 55116006c901315fa12a108b4e571f187f4b676e426Douglas Gregor E->getType()); 55216006c901315fa12a108b4e571f187f4b676e426Douglas Gregor 553b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitCXXConstructExpr(Val, E); 5547f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson} 5557f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 5567f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlssonvoid AggExprEmitter::VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) { 557dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 558dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 559dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump CGF.EmitCXXExprWithTemporaries(E, Val, VolatileDest, IsInitializer); 560b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson} 561b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson 562329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopesvoid AggExprEmitter::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) { 563dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 564dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 565dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 566dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 567195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 568dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 569dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump LValue LV = LValue::MakeAddr(Val, Qualifiers()); 57030311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson EmitNullInitializationToLValue(LV, E->getType()); 57130311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson} 57230311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson 57330311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlssonvoid AggExprEmitter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) { 574dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 575dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 576dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 577dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 578195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 579dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 580dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump LValue LV = LValue::MakeAddr(Val, Qualifiers()); 58130311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson EmitNullInitializationToLValue(LV, E->getType()); 582329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes} 583329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes 58478e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlssonvoid 58578e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders CarlssonAggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV, QualType T) { 5867f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // FIXME: Ignore result? 587f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // FIXME: Are initializers affected by volatile? 5883498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor if (isa<ImplicitValueInitExpr>(E)) { 58978e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson EmitNullInitializationToLValue(LV, T); 590e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson } else if (T->isReferenceType()) { 591e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson RValue RV = CGF.EmitReferenceBindingToExpr(E, /*IsInitializer=*/false); 592e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson CGF.EmitStoreThroughLValue(RV, LV, T); 59378e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson } else if (T->isAnyComplexType()) { 5943498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false); 59578e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson } else if (CGF.hasAggregateLLVMType(T)) { 596c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitAnyExpr(E, LV.getAddress(), false); 597c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else { 59878e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson CGF.EmitStoreThroughLValue(CGF.EmitAnyExpr(E), LV, T); 599f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 600f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 601305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 602f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitNullInitializationToLValue(LValue LV, QualType T) { 603f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (!CGF.hasAggregateLLVMType(T)) { 604f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // For non-aggregates, we can store zero 605c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson llvm::Value *Null = llvm::Constant::getNullValue(CGF.ConvertType(T)); 60682397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Null), LV, T); 607f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 608f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // There's a potential optimization opportunity in combining 609f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // memsets; that would be easy for arrays, but relatively 610f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // difficult for structures with the current code. 6111884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson CGF.EmitNullInitialization(LV.getAddress(), T); 612f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 613f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 614305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 615f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::VisitInitListExpr(InitListExpr *E) { 616a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#if 0 61713a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // FIXME: Assess perf here? Figure out what cases are worth optimizing here 61813a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // (Length of globals? Chunks of zeroed-out space?). 619a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // 620f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // If we can, prefer a copy from a global; this is a lot less code for long 621f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // globals, and it's easier for the current optimizers to analyze. 62213a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman if (llvm::Constant* C = CGF.CGM.EmitConstantExpr(E, E->getType(), &CGF)) { 623994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalVariable* GV = 62413a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman new llvm::GlobalVariable(CGF.CGM.getModule(), C->getType(), true, 62513a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman llvm::GlobalValue::InternalLinkage, C, ""); 62613a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman EmitFinalDestCopy(E, LValue::MakeAddr(GV, Qualifiers())); 627994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman return; 628994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman } 629a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#endif 630a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor if (E->hadArrayRangeDesignator()) { 631a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor CGF.ErrorUnsupported(E, "GNU array range designator extension"); 632a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor } 633a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor 634f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Handle initialization of an array. 635f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isArrayType()) { 636f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::PointerType *APType = 637f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::PointerType>(DestPtr->getType()); 638f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::ArrayType *AType = 639f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::ArrayType>(APType->getElementType()); 6401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 641f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumInitElements = E->getNumInits(); 642922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 6439619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (E->getNumInits() > 0) { 6449619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T1 = E->getType(); 6459619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T2 = E->getInit(0)->getType(); 6462dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman if (CGF.getContext().hasSameUnqualifiedType(T1, T2)) { 6479619662a1d42e2008b865d3459c0677e149dad1bChris Lattner EmitAggLoadOfLValue(E->getInit(0)); 6489619662a1d42e2008b865d3459c0677e149dad1bChris Lattner return; 6499619662a1d42e2008b865d3459c0677e149dad1bChris Lattner } 650922696f03ec9637449e2cba260493808b4977cd3Eli Friedman } 651922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 652f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumArrayElements = AType->getNumElements(); 653c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType ElementType = CGF.getContext().getCanonicalType(E->getType()); 6544c67834407ca6ab344dcf44fc599ad4938cfa96dDouglas Gregor ElementType = CGF.getContext().getAsArrayType(ElementType)->getElementType(); 6551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6560953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // FIXME: were we intentionally ignoring address spaces and GC attributes? 6570953e767ff7817f97b3ab20896b229891eeff45bJohn McCall Qualifiers Quals = CGF.MakeQualifiers(ElementType); 6581e692ace08959399794363e77499b73da5494af9Eli Friedman 659f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (uint64_t i = 0; i != NumArrayElements; ++i) { 660f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 661f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (i < NumInitElements) 6621e692ace08959399794363e77499b73da5494af9Eli Friedman EmitInitializationToLValue(E->getInit(i), 66378e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson LValue::MakeAddr(NextVal, Quals), 66478e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson ElementType); 665f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner else 6660953e767ff7817f97b3ab20896b229891eeff45bJohn McCall EmitNullInitializationToLValue(LValue::MakeAddr(NextVal, Quals), 667f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner ElementType); 668f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 669305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio return; 670f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 6711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 672f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner assert(E->getType()->isRecordType() && "Only support structs/unions here!"); 6731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 674f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Do struct initialization; this code just sets each individual member 675f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // to the approprate value. This makes bitfield support automatic; 676f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the disadvantage is that the generated code is more difficult for 677f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the optimizer, especially with bitfields. 678f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumInitElements = E->getNumInits(); 6796217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *SD = E->getType()->getAs<RecordType>()->getDecl(); 680f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned CurInitVal = 0; 6810bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6820bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (E->getType()->isUnionType()) { 6830bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Only initialize one field of a union. The field itself is 6840bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // specified by the initializer list. 6850bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (!E->getInitializedFieldInUnion()) { 6860bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Empty union; we have nothing to do. 6871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6880bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#ifndef NDEBUG 6890bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Make sure that it's really an empty and not a failure of 6900bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // semantic analysis. 69117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 69217945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 6930bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor Field != FieldEnd; ++Field) 6940bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor assert(Field->isUnnamedBitfield() && "Only unnamed bitfields allowed"); 6950bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#endif 6960bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 6970bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6980bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6990bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // FIXME: volatility 7000bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor FieldDecl *Field = E->getInitializedFieldInUnion(); 701e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson LValue FieldLoc = CGF.EmitLValueForFieldInitialization(DestPtr, Field, 0); 7020bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 7030bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (NumInitElements) { 7040bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Store the initializer into the field 70578e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson EmitInitializationToLValue(E->getInit(0), FieldLoc, Field->getType()); 7060bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } else { 7070bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Default-initialize to null 7080bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 7090bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 7100bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 7110bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 7120bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 713b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner 714b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner // If we're initializing the whole aggregate, just do it in place. 715b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner // FIXME: This is a hack around an AST bug (PR6537). 716b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner if (NumInitElements == 1 && E->getType() == E->getInit(0)->getType()) { 717b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner EmitInitializationToLValue(E->getInit(0), 718b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner LValue::MakeAddr(DestPtr, Qualifiers()), 719b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner E->getType()); 720b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner return; 721b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner } 722b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner 7231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 724f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Here we iterate over the fields; this makes it simpler to both 725f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // default-initialize fields and skip over unnamed fields. 72617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 72717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 72844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; ++Field) { 72944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // We're done once we hit the flexible array member 73044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (Field->getType()->isIncompleteArrayType()) 73144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor break; 73244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 73334e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor if (Field->isUnnamedBitfield()) 734f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner continue; 73534e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor 7361e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 737e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson LValue FieldLoc = CGF.EmitLValueForFieldInitialization(DestPtr, *Field, 0); 73814674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian // We never generate write-barries for initialized fields. 73914674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian LValue::SetObjCNonGC(FieldLoc, true); 740f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurInitVal < NumInitElements) { 741b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner // Store the initializer into the field. 742b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner EmitInitializationToLValue(E->getInit(CurInitVal++), FieldLoc, 74378e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson Field->getType()); 744f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 745f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // We're out of initalizers; default-initialize to null 74644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 747f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 748145cd89f9233d375381aa13bd28b2d36f83e6181Lauro Ramos Venancio } 749636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel} 750636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 751ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 752ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Entry Points into this File 753ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 754ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 755e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// EmitAggExpr - Emit the computation of the specified expression of aggregate 756e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// type. The result is computed into DestPtr. Note that if DestPtr is null, 757e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// the value of the aggregate expression is not needed. If VolatileDest is 758e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// true, DestPtr cannot be 0. 75918aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar// 76018aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar// FIXME: Take Qualifiers object. 761ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattnervoid CodeGenFunction::EmitAggExpr(const Expr *E, llvm::Value *DestPtr, 76214c5cbf59cffee52275230922283a247de407712Anders Carlsson bool VolatileDest, bool IgnoreResult, 7631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool IsInitializer, 76408c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection) { 765ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner assert(E && hasAggregateLLVMType(E->getType()) && 766ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner "Invalid aggregate expression to emit"); 767e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump assert ((DestPtr != 0 || VolatileDest == false) 768e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump && "volatile aggregate can't be 0"); 7691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 77008c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian AggExprEmitter(*this, DestPtr, VolatileDest, IgnoreResult, IsInitializer, 77108c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian RequiresGCollection) 77249d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump .Visit(const_cast<Expr*>(E)); 773ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 7747482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 77518aba0dd518e486d8b50523e7dafb4b5657135d2Daniel DunbarLValue CodeGenFunction::EmitAggExprToLValue(const Expr *E) { 77618aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar assert(hasAggregateLLVMType(E->getType()) && "Invalid argument!"); 77718aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar Qualifiers Q = MakeQualifiers(E->getType()); 778195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar llvm::Value *Temp = CreateMemTemp(E->getType()); 77918aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar EmitAggExpr(E, Temp, Q.hasVolatile()); 78018aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar return LValue::MakeAddr(Temp, Q); 78118aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar} 78218aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar 7837482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr, 78427fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump llvm::Value *SrcPtr, QualType Ty, 78527fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump bool isVolatile) { 7867482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 7871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7880d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson if (getContext().getLangOptions().CPlusPlus) { 7890d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson if (const RecordType *RT = Ty->getAs<RecordType>()) { 790e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor CXXRecordDecl *Record = cast<CXXRecordDecl>(RT->getDecl()); 791e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor assert((Record->hasTrivialCopyConstructor() || 7921d49f2112572c247ff9c209de112fbf5d9ecf765Fariborz Jahanian Record->hasTrivialCopyAssignment()) && 793e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor "Trying to aggregate-copy a type without a trivial copy " 794e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor "constructor or assignment operator"); 795419aa964ae845aa5b1183fabb2f1cff78faaedddDouglas Gregor // Ignore empty classes in C++. 796e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor if (Record->isEmpty()) 7970d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson return; 7980d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson } 7990d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson } 8000d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson 80183c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // Aggregate assignment turns into llvm.memcpy. This is almost valid per 802ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // C99 6.5.16.1p3, which states "If the value being stored in an object is 803ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // read from another object that overlaps in anyway the storage of the first 804ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // object, then the overlap shall be exact and the two objects shall have 805ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // qualified or unqualified versions of a compatible type." 806ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // 80783c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // memcpy is not defined if the source and destination pointers are exactly 808ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // equal, but other compilers do this optimization, and almost every memcpy 809ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // implementation handles this case safely. If there is a libc that does not 810ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // safely handle this, we can add a target hook. 8113c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *BP = llvm::Type::getInt8PtrTy(VMContext); 8127482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (DestPtr->getType() != BP) 8137482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr = Builder.CreateBitCast(DestPtr, BP, "tmp"); 8147482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (SrcPtr->getType() != BP) 8157482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar SrcPtr = Builder.CreateBitCast(SrcPtr, BP, "tmp"); 8161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8177482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Get size and alignment info for this aggregate. 8187482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar std::pair<uint64_t, unsigned> TypeInfo = getContext().getTypeInfo(Ty); 8191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8207482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // FIXME: Handle variable sized types. 8210032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = 8220032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::IntegerType::get(VMContext, LLVMPointerWidth); 8231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 824fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // FIXME: If we have a volatile struct, the optimizer can remove what might 825fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // appear to be `extra' memory ops: 826fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 827fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // volatile struct { int i; } a, b; 828fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 829fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // int main() { 830fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 831fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 832fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // } 833fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 8343ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang // we need to use a different call here. We use isVolatile to indicate when 83549d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // either the source or the destination is volatile. 8363ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *I1Ty = llvm::Type::getInt1Ty(VMContext); 8373ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *I8Ty = llvm::Type::getInt8Ty(VMContext); 8383ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *I32Ty = llvm::Type::getInt32Ty(VMContext); 8393ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 8403ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::PointerType *DPT = cast<llvm::PointerType>(DestPtr->getType()); 8413ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *DBP = llvm::PointerType::get(I8Ty, DPT->getAddressSpace()); 8423ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang if (DestPtr->getType() != DBP) 8433ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang DestPtr = Builder.CreateBitCast(DestPtr, DBP, "tmp"); 8443ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 8453ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::PointerType *SPT = cast<llvm::PointerType>(SrcPtr->getType()); 8463ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SBP = llvm::PointerType::get(I8Ty, SPT->getAddressSpace()); 8473ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang if (SrcPtr->getType() != SBP) 8483ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang SrcPtr = Builder.CreateBitCast(SrcPtr, SBP, "tmp"); 8493ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 85055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian if (const RecordType *RecordTy = Ty->getAs<RecordType>()) { 85155bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian RecordDecl *Record = RecordTy->getDecl(); 85255bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian if (Record->hasObjectMember()) { 85355bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian unsigned long size = TypeInfo.first/8; 85455bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian const llvm::Type *SizeTy = ConvertType(getContext().getSizeType()); 85555bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian llvm::Value *SizeVal = llvm::ConstantInt::get(SizeTy, size); 85655bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian CGM.getObjCRuntime().EmitGCMemmoveCollectable(*this, DestPtr, SrcPtr, 85755bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian SizeVal); 85855bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian return; 85955bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 86055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } else if (getContext().getAsArrayType(Ty)) { 86155bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian QualType BaseType = getContext().getBaseElementType(Ty); 86255bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian if (const RecordType *RecordTy = BaseType->getAs<RecordType>()) { 86355bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian if (RecordTy->getDecl()->hasObjectMember()) { 86455bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian unsigned long size = TypeInfo.first/8; 86555bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian const llvm::Type *SizeTy = ConvertType(getContext().getSizeType()); 86655bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian llvm::Value *SizeVal = llvm::ConstantInt::get(SizeTy, size); 86755bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian CGM.getObjCRuntime().EmitGCMemmoveCollectable(*this, DestPtr, SrcPtr, 86855bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian SizeVal); 86955bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian return; 87055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 87155bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 87255bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 87355bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian 8743ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang Builder.CreateCall5(CGM.getMemCpyFn(DestPtr->getType(), SrcPtr->getType(), 8753ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang IntPtr), 8767482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr, SrcPtr, 8777482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // TypeInfo.first describes size in bits. 8784a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::ConstantInt::get(IntPtr, TypeInfo.first/8), 8793ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang llvm::ConstantInt::get(I32Ty, TypeInfo.second/8), 8803ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang llvm::ConstantInt::get(I1Ty, isVolatile)); 8817482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 882