CGExprAgg.cpp revision a8f28da6265950eea768f7e4ade15e4ebaddd56f
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); 1119c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 1128fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner void VisitObjCMessageExpr(ObjCMessageExpr *E); 1130a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar void VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { 1140a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar EmitAggLoadOfLValue(E); 1150a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar } 1169c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar void VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E); 11709105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian void VisitObjCImplicitSetterGetterRefExpr(ObjCImplicitSetterGetterRefExpr *E); 1181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1199c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitConditionalOperator(const ConditionalOperator *CO); 120a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson void VisitChooseExpr(const ChooseExpr *CE); 121636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel void VisitInitListExpr(InitListExpr *E); 12230311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson void VisitImplicitValueInitExpr(ImplicitValueInitExpr *E); 12304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { 12404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Visit(DAE->getExpr()); 12504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner } 126b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E); 12731ccf377f4a676eb6c205b47eef435de616d5e2dAnders Carlsson void VisitCXXConstructExpr(const CXXConstructExpr *E); 1287f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson void VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E); 129ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor void VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E); 1302710c4159ff4761ba9867aca18f60a178b297686Mike Stump void VisitCXXTypeidExpr(CXXTypeidExpr *E) { EmitAggLoadOfLValue(E); } 1317f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 132b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman void VisitVAArgExpr(VAArgExpr *E); 133f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 13478e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson void EmitInitializationToLValue(Expr *E, LValue Address, QualType T); 135f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitNullInitializationToLValue(LValue Address, QualType T); 1369c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // case Expr::ChooseExprClass: 13739406b1395f69341c045e863a6620310abdc55b6Mike Stump void VisitCXXThrowExpr(const CXXThrowExpr *E) { CGF.EmitCXXThrowExpr(E); } 1389c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner}; 1399c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner} // end anonymous namespace. 1409c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 141ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 142ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Utilities 143ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 1449c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 145883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// EmitAggLoadOfLValue - Given an expression with aggregate type that 146883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// represents a value lvalue, this method emits the address of the lvalue, 147883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// then loads the result into DestPtr. 1489c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::EmitAggLoadOfLValue(const Expr *E) { 1499c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LV = CGF.EmitLValue(E); 1504ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, LV); 1514ac20ddc7ab324a59862657f756bdd060076b137Mike Stump} 1524ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 153fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// \brief True if the given aggregate type requires special GC API calls. 154fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCallbool AggExprEmitter::TypeRequiresGCollection(QualType T) { 155fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // Only record types have members that might require garbage collection. 156fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall const RecordType *RecordTy = T->getAs<RecordType>(); 157fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall if (!RecordTy) return false; 158fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 159fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // Don't mess with non-trivial C++ types. 160fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RecordDecl *Record = RecordTy->getDecl(); 161fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall if (isa<CXXRecordDecl>(Record) && 162fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall (!cast<CXXRecordDecl>(Record)->hasTrivialCopyConstructor() || 163fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall !cast<CXXRecordDecl>(Record)->hasTrivialDestructor())) 164fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall return false; 165fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 166fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall // Check whether the type has an object member. 167fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall return Record->hasObjectMember(); 168fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall} 169fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 170fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// \brief Perform the final move to DestPtr if RequiresGCollection is set. 171fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// 172fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// The idea is that you do something like this: 173fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// RValue Result = EmitSomething(..., getReturnValueSlot()); 174fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// EmitGCMove(E, Result); 175fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// If GC doesn't interfere, this will cause the result to be emitted 176fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// directly into the return value slot. If GC does interfere, a final 177fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall/// move will be performed. 178fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCallvoid AggExprEmitter::EmitGCMove(const Expr *E, RValue Src) { 17955bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian if (RequiresGCollection) { 18055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian std::pair<uint64_t, unsigned> TypeInfo = 18155bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian CGF.getContext().getTypeInfo(E->getType()); 18255bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian unsigned long size = TypeInfo.first/8; 18355bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian const llvm::Type *SizeTy = CGF.ConvertType(CGF.getContext().getSizeType()); 18455bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian llvm::Value *SizeVal = llvm::ConstantInt::get(SizeTy, size); 18555bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian CGF.CGM.getObjCRuntime().EmitGCMemmoveCollectable(CGF, DestPtr, 186fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall Src.getAggregateAddr(), 18755bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian SizeVal); 18855bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 189fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall} 190fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 1914ac20ddc7ab324a59862657f756bdd060076b137Mike Stump/// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 19249d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stumpvoid AggExprEmitter::EmitFinalDestCopy(const Expr *E, RValue Src, bool Ignore) { 1934ac20ddc7ab324a59862657f756bdd060076b137Mike Stump assert(Src.isAggregate() && "value must be aggregate value!"); 1944ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 195a8f28da6265950eea768f7e4ade15e4ebaddd56fJohn McCall // If DestPtr is null, then we're evaluating an aggregate expression 196a8f28da6265950eea768f7e4ade15e4ebaddd56fJohn McCall // in a context (like an expression statement) that doesn't care 197a8f28da6265950eea768f7e4ade15e4ebaddd56fJohn McCall // about the result. C says that an lvalue-to-rvalue conversion is 198a8f28da6265950eea768f7e4ade15e4ebaddd56fJohn McCall // performed in these cases; C++ says that it is not. In either 199a8f28da6265950eea768f7e4ade15e4ebaddd56fJohn McCall // case, we don't actually need to do anything unless the value is 200a8f28da6265950eea768f7e4ade15e4ebaddd56fJohn McCall // volatile. 2019ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump if (DestPtr == 0) { 202a8f28da6265950eea768f7e4ade15e4ebaddd56fJohn McCall if (!Src.isVolatileQualified() || 203a8f28da6265950eea768f7e4ade15e4ebaddd56fJohn McCall CGF.CGM.getLangOptions().CPlusPlus || 204a8f28da6265950eea768f7e4ade15e4ebaddd56fJohn McCall (IgnoreResult && Ignore)) 2059ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump return; 206a8f28da6265950eea768f7e4ade15e4ebaddd56fJohn McCall 20749d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // If the source is volatile, we must read from it; to do that, we need 20849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // some place to put it. 209195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar DestPtr = CGF.CreateMemTemp(E->getType(), "agg.tmp"); 2109ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump } 211883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 21208c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian if (RequiresGCollection) { 21355bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian std::pair<uint64_t, unsigned> TypeInfo = 21455bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian CGF.getContext().getTypeInfo(E->getType()); 21555bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian unsigned long size = TypeInfo.first/8; 21655bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian const llvm::Type *SizeTy = CGF.ConvertType(CGF.getContext().getSizeType()); 21755bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian llvm::Value *SizeVal = llvm::ConstantInt::get(SizeTy, size); 21808c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian CGF.CGM.getObjCRuntime().EmitGCMemmoveCollectable(CGF, 21908c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian DestPtr, Src.getAggregateAddr(), 22055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian SizeVal); 22108c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian return; 22208c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian } 2234ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // If the result of the assignment is used, copy the LHS there also. 2244ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // FIXME: Pass VolatileDest as well. I think we also need to merge volatile 2254ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // from the source as well, as we can't eliminate it if either operand 2264ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // is volatile, unless copy has volatile for both source and destination.. 22727fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump CGF.EmitAggregateCopy(DestPtr, Src.getAggregateAddr(), E->getType(), 22827fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump VolatileDest|Src.isVolatileQualified()); 2294ac20ddc7ab324a59862657f756bdd060076b137Mike Stump} 2304ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 2314ac20ddc7ab324a59862657f756bdd060076b137Mike Stump/// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 23249d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stumpvoid AggExprEmitter::EmitFinalDestCopy(const Expr *E, LValue Src, bool Ignore) { 2334ac20ddc7ab324a59862657f756bdd060076b137Mike Stump assert(Src.isSimple() && "Can't have aggregate bitfield, vector, etc"); 2344ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 2354ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RValue::getAggregate(Src.getAddress(), 23649d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump Src.isVolatileQualified()), 23749d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump Ignore); 238883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 239883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 240ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 241ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Visitor Methods 242ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 243ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 2444d8673b645ad86e496b886a0f80b60763f67071dAnders Carlssonvoid AggExprEmitter::VisitCastExpr(CastExpr *E) { 24569cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor if (!DestPtr && E->getCastKind() != CastExpr::CK_Dynamic) { 2464ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor Visit(E->getSubExpr()); 2474ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor return; 2484ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor } 2494ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor 2503016842613674ab80796567239c15d529aff1458Anders Carlsson switch (E->getCastKind()) { 2513016842613674ab80796567239c15d529aff1458Anders Carlsson default: assert(0 && "Unhandled cast kind!"); 2523016842613674ab80796567239c15d529aff1458Anders Carlsson 25369cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor case CastExpr::CK_Dynamic: { 25469cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor assert(isa<CXXDynamicCastExpr>(E) && "CK_Dynamic without a dynamic_cast?"); 25569cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor LValue LV = CGF.EmitCheckedLValue(E->getSubExpr()); 25669cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor // FIXME: Do we also need to handle property references here? 25769cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor if (LV.isSimple()) 25869cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor CGF.EmitDynamicCast(LV.getAddress(), cast<CXXDynamicCastExpr>(E)); 25969cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor else 26069cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor CGF.CGM.ErrorUnsupported(E, "non-simple lvalue dynamic_cast"); 26169cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor 26269cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor if (DestPtr) 26369cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor CGF.CGM.ErrorUnsupported(E, "lvalue dynamic_cast with a destination"); 26469cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor break; 26569cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor } 26669cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor 2673016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_ToUnion: { 2684d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // GCC union extension 26979c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar QualType Ty = E->getSubExpr()->getType(); 27079c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar QualType PtrTy = CGF.getContext().getPointerType(Ty); 27134ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman llvm::Value *CastPtr = Builder.CreateBitCast(DestPtr, 27234ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman CGF.ConvertType(PtrTy)); 27379c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar EmitInitializationToLValue(E->getSubExpr(), CGF.MakeAddrLValue(CastPtr, Ty), 27479c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar Ty); 2753016842613674ab80796567239c15d529aff1458Anders Carlsson break; 2767e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes } 2771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2782d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor case CastExpr::CK_DerivedToBase: 2792d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor case CastExpr::CK_BaseToDerived: 2802d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor case CastExpr::CK_UncheckedDerivedToBase: { 2812d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor assert(0 && "cannot perform hierarchy conversion in EmitAggExpr: " 2822d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor "should have been unpacked before we got here"); 2832d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor break; 2842d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor } 2852d6b0e94db30c0e2754d270753c6f75478e451bfDouglas Gregor 2864d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // FIXME: Remove the CK_Unknown check here. 2873016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_Unknown: 2883016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_NoOp: 2893016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_UserDefinedConversion: 2903016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_ConstructorConversion: 2913016842613674ab80796567239c15d529aff1458Anders Carlsson assert(CGF.getContext().hasSameUnqualifiedType(E->getSubExpr()->getType(), 2923016842613674ab80796567239c15d529aff1458Anders Carlsson E->getType()) && 2933016842613674ab80796567239c15d529aff1458Anders Carlsson "Implicit cast types must be compatible"); 2943016842613674ab80796567239c15d529aff1458Anders Carlsson Visit(E->getSubExpr()); 2953016842613674ab80796567239c15d529aff1458Anders Carlsson break; 296e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 297e39a3894513349908cdb3beba2614e53cb288e6cDouglas Gregor case CastExpr::CK_LValueBitCast: 298e39a3894513349908cdb3beba2614e53cb288e6cDouglas Gregor llvm_unreachable("there are no lvalue bit-casts on aggregates"); 299e39a3894513349908cdb3beba2614e53cb288e6cDouglas Gregor break; 3003016842613674ab80796567239c15d529aff1458Anders Carlsson } 301e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson} 302e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson 3039619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitCallExpr(const CallExpr *E) { 304e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson if (E->getCallReturnType()->isReferenceType()) { 305e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson EmitAggLoadOfLValue(E); 306e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson return; 307e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson } 3081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 309fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RValue RV = CGF.EmitCallExpr(E, getReturnValueSlot()); 310fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall EmitGCMove(E, RV); 311796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman} 3129619662a1d42e2008b865d3459c0677e149dad1bChris Lattner 3139619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) { 314fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RValue RV = CGF.EmitObjCMessageExpr(E, getReturnValueSlot()); 315fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall EmitGCMove(E, RV); 3168fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 317796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 3189c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbarvoid AggExprEmitter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 319fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RValue RV = CGF.EmitObjCPropertyGet(E, getReturnValueSlot()); 320fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall EmitGCMove(E, RV); 3215daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian} 3225daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 32309105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanianvoid AggExprEmitter::VisitObjCImplicitSetterGetterRefExpr( 32409105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian ObjCImplicitSetterGetterRefExpr *E) { 325fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RValue RV = CGF.EmitObjCPropertyGet(E, getReturnValueSlot()); 326fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall EmitGCMove(E, RV); 327148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson} 328148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 3299619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitBinComma(const BinaryOperator *E) { 3307f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitAnyExpr(E->getLHS(), 0, false, true); 33114c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.EmitAggExpr(E->getRHS(), DestPtr, VolatileDest, 33214c5cbf59cffee52275230922283a247de407712Anders Carlsson /*IgnoreResult=*/false, IsInitializer); 33307fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman} 33407fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman 335b2d963f527674275c9109252474948368b6e6161Chris Lattnervoid AggExprEmitter::VisitStmtExpr(const StmtExpr *E) { 336b2d963f527674275c9109252474948368b6e6161Chris Lattner CGF.EmitCompoundStmt(*E->getSubStmt(), true, DestPtr, VolatileDest); 337b2d963f527674275c9109252474948368b6e6161Chris Lattner} 338b2d963f527674275c9109252474948368b6e6161Chris Lattner 3399c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitBinaryOperator(const BinaryOperator *E) { 34052f08bcbb81c750ed62b53ed0b34aff16143b877Fariborz Jahanian if (E->getOpcode() == BinaryOperator::PtrMemD || 34152f08bcbb81c750ed62b53ed0b34aff16143b877Fariborz Jahanian E->getOpcode() == BinaryOperator::PtrMemI) 3428bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian VisitPointerToDataMemberBinaryOperator(E); 3438bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian else 3448bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian CGF.ErrorUnsupported(E, "aggregate binary expression"); 3458bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian} 3468bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian 3478bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanianvoid AggExprEmitter::VisitPointerToDataMemberBinaryOperator( 3488bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian const BinaryOperator *E) { 3498bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian LValue LV = CGF.EmitPointerToDataMemberBinaryExpr(E); 3508bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian EmitFinalDestCopy(E, LV); 351ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 352ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 35303d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattnervoid AggExprEmitter::VisitBinAssign(const BinaryOperator *E) { 354ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // For an assignment to work, the value on the right has 355ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // to be compatible with the value on the left. 3562dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(), 3572dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman E->getRHS()->getType()) 358ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman && "Invalid assignment"); 3599c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LHS = CGF.EmitLValue(E->getLHS()); 360883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 3617f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // We have to special case property setters, otherwise we must have 3627f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // a simple lvalue (no aggregates inside vectors, bitfields). 3637f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (LHS.isPropertyRef()) { 3647f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar llvm::Value *AggLoc = DestPtr; 3657f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (!AggLoc) 366195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar AggLoc = CGF.CreateMemTemp(E->getRHS()->getType()); 367240993d17d2b51c78d52df8743bdee4177960341Mike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 3681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), 369240993d17d2b51c78d52df8743bdee4177960341Mike Stump RValue::getAggregate(AggLoc, VolatileDest)); 370b3589f44c5d295cd41de2c83f3475116835eeebdMike Stump } else if (LHS.isKVCRef()) { 37143f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian llvm::Value *AggLoc = DestPtr; 37243f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian if (!AggLoc) 373195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar AggLoc = CGF.CreateMemTemp(E->getRHS()->getType()); 374a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 3751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CGF.EmitObjCPropertySet(LHS.getKVCRefExpr(), 376a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump RValue::getAggregate(AggLoc, VolatileDest)); 3777f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } else { 37808c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection = false; 379fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall if (CGF.getContext().getLangOptions().getGCMode()) 380fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall RequiresGCollection = TypeRequiresGCollection(E->getLHS()->getType()); 381fa037bd3f79d3c70197a3224bb1b29c6c4af0098John McCall 3827f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // Codegen the RHS so that it stores directly into the LHS. 38308c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian CGF.EmitAggExpr(E->getRHS(), LHS.getAddress(), LHS.isVolatileQualified(), 38408c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian false, false, RequiresGCollection); 38549d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump EmitFinalDestCopy(E, LHS, true); 3867f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } 387883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 388883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 3899c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitConditionalOperator(const ConditionalOperator *E) { 3908e274bd14bcca8466542477844b88e90e90cde1aEli Friedman if (!E->getLHS()) { 3918e274bd14bcca8466542477844b88e90e90cde1aEli Friedman CGF.ErrorUnsupported(E, "conditional operator with missing LHS"); 3928e274bd14bcca8466542477844b88e90e90cde1aEli Friedman return; 3938e274bd14bcca8466542477844b88e90e90cde1aEli Friedman } 3948e274bd14bcca8466542477844b88e90e90cde1aEli Friedman 3959615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 3969615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 3979615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 3981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3998e274bd14bcca8466542477844b88e90e90cde1aEli Friedman CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock); 4001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 40172119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.BeginConditionalBranch(); 4029c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(LHSBlock); 4031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 404883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // Handle the GNU extension for missing LHS. 405883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(E->getLHS() && "Must have LHS for aggregate value"); 406883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 407c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getLHS()); 40872119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.EndConditionalBranch(); 409d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 41172119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.BeginConditionalBranch(); 4129c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(RHSBlock); 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 414c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getRHS()); 41572119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.EndConditionalBranch(); 416d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 4171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4189c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(ContBlock); 419883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 420ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 421a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlssonvoid AggExprEmitter::VisitChooseExpr(const ChooseExpr *CE) { 422a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson Visit(CE->getChosenSubExpr(CGF.getContext())); 423a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson} 424a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson 425b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedmanvoid AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 4260785570af3ef5f8c5a0377129e41efe6f3f8d770Daniel Dunbar llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); 427ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 428ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 4290262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl if (!ArgPtr) { 430ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.ErrorUnsupported(VE, "aggregate va_arg expression"); 4310262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl return; 4320262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl } 4330262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl 43479c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar EmitFinalDestCopy(VE, CGF.MakeAddrLValue(ArgPtr, VE->getType())); 435b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman} 436b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman 437b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlssonvoid AggExprEmitter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { 438b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 4391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 440b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 441b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 442195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 443b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 444b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // FIXME: volatile 445b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitAggExpr(E->getSubExpr(), Val, false); 4461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 447b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Visit(E->getSubExpr()); 4481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 44914c5cbf59cffee52275230922283a247de407712Anders Carlsson // Don't make this a live temporary if we're emitting an initializer expr. 45014c5cbf59cffee52275230922283a247de407712Anders Carlsson if (!IsInitializer) 451f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall CGF.EmitCXXTemporary(E->getTemporary(), Val); 452b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson} 453b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 454b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlssonvoid 45531ccf377f4a676eb6c205b47eef435de616d5e2dAnders CarlssonAggExprEmitter::VisitCXXConstructExpr(const CXXConstructExpr *E) { 456b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 4571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 458fbe02ffb573ac2aa51351278af1c7970573b6ed5Chris Lattner if (!Val) // Create a temporary variable. 459195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 4608e587a15da6d3457a418239d5eb4146fcbd209f3Anders Carlsson 461b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitCXXConstructExpr(Val, E); 4627f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson} 4637f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 4647f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlssonvoid AggExprEmitter::VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) { 465dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 466dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 467dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump CGF.EmitCXXExprWithTemporaries(E, Val, VolatileDest, IsInitializer); 468b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson} 469b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson 470ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregorvoid AggExprEmitter::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) { 471dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 472dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 473dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 474dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 475195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 476dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 47779c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar EmitNullInitializationToLValue(CGF.MakeAddrLValue(Val, E->getType()), 47879c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar E->getType()); 47930311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson} 48030311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson 48130311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlssonvoid AggExprEmitter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) { 482dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 483dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 484dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 485dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 486195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 487dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 48879c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar EmitNullInitializationToLValue(CGF.MakeAddrLValue(Val, E->getType()), 48979c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar E->getType()); 490329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes} 491329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes 49278e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlssonvoid 49378e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders CarlssonAggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV, QualType T) { 4947f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // FIXME: Ignore result? 495f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // FIXME: Are initializers affected by volatile? 4963498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor if (isa<ImplicitValueInitExpr>(E)) { 49778e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson EmitNullInitializationToLValue(LV, T); 498e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson } else if (T->isReferenceType()) { 49932f36baa6c8d491c374af622b4e3ac28d597453cAnders Carlsson RValue RV = CGF.EmitReferenceBindingToExpr(E, /*InitializedDecl=*/0); 500e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson CGF.EmitStoreThroughLValue(RV, LV, T); 50178e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson } else if (T->isAnyComplexType()) { 5023498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false); 50378e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson } else if (CGF.hasAggregateLLVMType(T)) { 504c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitAnyExpr(E, LV.getAddress(), false); 505c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else { 50678e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson CGF.EmitStoreThroughLValue(CGF.EmitAnyExpr(E), LV, T); 507f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 508f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 509305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 510f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitNullInitializationToLValue(LValue LV, QualType T) { 511f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (!CGF.hasAggregateLLVMType(T)) { 512f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // For non-aggregates, we can store zero 513c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson llvm::Value *Null = llvm::Constant::getNullValue(CGF.ConvertType(T)); 51482397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Null), LV, T); 515f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 516f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // There's a potential optimization opportunity in combining 517f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // memsets; that would be easy for arrays, but relatively 518f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // difficult for structures with the current code. 5191884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson CGF.EmitNullInitialization(LV.getAddress(), T); 520f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 521f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 522305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 523f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::VisitInitListExpr(InitListExpr *E) { 524a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#if 0 52513a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // FIXME: Assess perf here? Figure out what cases are worth optimizing here 52613a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // (Length of globals? Chunks of zeroed-out space?). 527a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // 528f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // If we can, prefer a copy from a global; this is a lot less code for long 529f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // globals, and it's easier for the current optimizers to analyze. 53013a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman if (llvm::Constant* C = CGF.CGM.EmitConstantExpr(E, E->getType(), &CGF)) { 531994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalVariable* GV = 53213a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman new llvm::GlobalVariable(CGF.CGM.getModule(), C->getType(), true, 53313a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman llvm::GlobalValue::InternalLinkage, C, ""); 53479c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar EmitFinalDestCopy(E, CGF.MakeAddrLValue(GV, E->getType())); 535994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman return; 536994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman } 537a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#endif 538a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor if (E->hadArrayRangeDesignator()) { 539a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor CGF.ErrorUnsupported(E, "GNU array range designator extension"); 540a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor } 541a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor 542f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Handle initialization of an array. 543f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isArrayType()) { 544f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::PointerType *APType = 545f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::PointerType>(DestPtr->getType()); 546f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::ArrayType *AType = 547f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::ArrayType>(APType->getElementType()); 5481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 549f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumInitElements = E->getNumInits(); 550922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 5519619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (E->getNumInits() > 0) { 5529619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T1 = E->getType(); 5539619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T2 = E->getInit(0)->getType(); 5542dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman if (CGF.getContext().hasSameUnqualifiedType(T1, T2)) { 5559619662a1d42e2008b865d3459c0677e149dad1bChris Lattner EmitAggLoadOfLValue(E->getInit(0)); 5569619662a1d42e2008b865d3459c0677e149dad1bChris Lattner return; 5579619662a1d42e2008b865d3459c0677e149dad1bChris Lattner } 558922696f03ec9637449e2cba260493808b4977cd3Eli Friedman } 559922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 560f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumArrayElements = AType->getNumElements(); 561c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType ElementType = CGF.getContext().getCanonicalType(E->getType()); 5624c67834407ca6ab344dcf44fc599ad4938cfa96dDouglas Gregor ElementType = CGF.getContext().getAsArrayType(ElementType)->getElementType(); 5631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5640953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // FIXME: were we intentionally ignoring address spaces and GC attributes? 5651e692ace08959399794363e77499b73da5494af9Eli Friedman 566f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (uint64_t i = 0; i != NumArrayElements; ++i) { 567f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 5689f553f5b3bd45304dfda6bdc5cd2baac64b3315bDaniel Dunbar LValue LV = CGF.MakeAddrLValue(NextVal, ElementType); 569f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (i < NumInitElements) 5709f553f5b3bd45304dfda6bdc5cd2baac64b3315bDaniel Dunbar EmitInitializationToLValue(E->getInit(i), LV, ElementType); 5719f553f5b3bd45304dfda6bdc5cd2baac64b3315bDaniel Dunbar 572f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner else 5739f553f5b3bd45304dfda6bdc5cd2baac64b3315bDaniel Dunbar EmitNullInitializationToLValue(LV, ElementType); 574f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 575305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio return; 576f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 5771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 578f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner assert(E->getType()->isRecordType() && "Only support structs/unions here!"); 5791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 580f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Do struct initialization; this code just sets each individual member 581f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // to the approprate value. This makes bitfield support automatic; 582f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the disadvantage is that the generated code is more difficult for 583f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the optimizer, especially with bitfields. 584f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumInitElements = E->getNumInits(); 5856217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *SD = E->getType()->getAs<RecordType>()->getDecl(); 586f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned CurInitVal = 0; 5870bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 5880bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (E->getType()->isUnionType()) { 5890bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Only initialize one field of a union. The field itself is 5900bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // specified by the initializer list. 5910bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (!E->getInitializedFieldInUnion()) { 5920bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Empty union; we have nothing to do. 5931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5940bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#ifndef NDEBUG 5950bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Make sure that it's really an empty and not a failure of 5960bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // semantic analysis. 59717945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 59817945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 5990bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor Field != FieldEnd; ++Field) 6000bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor assert(Field->isUnnamedBitfield() && "Only unnamed bitfields allowed"); 6010bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#endif 6020bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 6030bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6040bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6050bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // FIXME: volatility 6060bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor FieldDecl *Field = E->getInitializedFieldInUnion(); 607e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson LValue FieldLoc = CGF.EmitLValueForFieldInitialization(DestPtr, Field, 0); 6080bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6090bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (NumInitElements) { 6100bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Store the initializer into the field 61178e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson EmitInitializationToLValue(E->getInit(0), FieldLoc, Field->getType()); 6120bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } else { 6130bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Default-initialize to null 6140bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 6150bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6160bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6170bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 6180bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 619b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner 620b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner // If we're initializing the whole aggregate, just do it in place. 621b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner // FIXME: This is a hack around an AST bug (PR6537). 622b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner if (NumInitElements == 1 && E->getType() == E->getInit(0)->getType()) { 623b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner EmitInitializationToLValue(E->getInit(0), 62479c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar CGF.MakeAddrLValue(DestPtr, E->getType()), 625b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner E->getType()); 626b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner return; 627b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner } 628b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner 6291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 630f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Here we iterate over the fields; this makes it simpler to both 631f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // default-initialize fields and skip over unnamed fields. 63217945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 63317945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 63444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; ++Field) { 63544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // We're done once we hit the flexible array member 63644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (Field->getType()->isIncompleteArrayType()) 63744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor break; 63844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 63934e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor if (Field->isUnnamedBitfield()) 640f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner continue; 64134e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor 6421e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 643e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson LValue FieldLoc = CGF.EmitLValueForFieldInitialization(DestPtr, *Field, 0); 64414674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian // We never generate write-barries for initialized fields. 645ea619177353e0a9f35b7d926a92df0e103515dbeDaniel Dunbar FieldLoc.setNonGC(true); 646f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurInitVal < NumInitElements) { 647b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner // Store the initializer into the field. 648b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner EmitInitializationToLValue(E->getInit(CurInitVal++), FieldLoc, 64978e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson Field->getType()); 650f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 651f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // We're out of initalizers; default-initialize to null 65244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 653f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 654145cd89f9233d375381aa13bd28b2d36f83e6181Lauro Ramos Venancio } 655636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel} 656636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 657ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 658ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Entry Points into this File 659ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 660ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 661e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// EmitAggExpr - Emit the computation of the specified expression of aggregate 662e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// type. The result is computed into DestPtr. Note that if DestPtr is null, 663e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// the value of the aggregate expression is not needed. If VolatileDest is 664e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// true, DestPtr cannot be 0. 66518aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar// 66618aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar// FIXME: Take Qualifiers object. 667ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattnervoid CodeGenFunction::EmitAggExpr(const Expr *E, llvm::Value *DestPtr, 66814c5cbf59cffee52275230922283a247de407712Anders Carlsson bool VolatileDest, bool IgnoreResult, 6691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool IsInitializer, 67008c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection) { 671ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner assert(E && hasAggregateLLVMType(E->getType()) && 672ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner "Invalid aggregate expression to emit"); 673e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump assert ((DestPtr != 0 || VolatileDest == false) 674e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump && "volatile aggregate can't be 0"); 6751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 67608c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian AggExprEmitter(*this, DestPtr, VolatileDest, IgnoreResult, IsInitializer, 67708c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian RequiresGCollection) 67849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump .Visit(const_cast<Expr*>(E)); 679ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 6807482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 68118aba0dd518e486d8b50523e7dafb4b5657135d2Daniel DunbarLValue CodeGenFunction::EmitAggExprToLValue(const Expr *E) { 68218aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar assert(hasAggregateLLVMType(E->getType()) && "Invalid argument!"); 683195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar llvm::Value *Temp = CreateMemTemp(E->getType()); 68479c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar LValue LV = MakeAddrLValue(Temp, E->getType()); 68579c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar EmitAggExpr(E, Temp, LV.isVolatileQualified()); 68679c3928d816f317dd27109fb92e7d190c1c68329Daniel Dunbar return LV; 68718aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar} 68818aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar 6897482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr, 69027fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump llvm::Value *SrcPtr, QualType Ty, 69127fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump bool isVolatile) { 6927482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 6931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6940d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson if (getContext().getLangOptions().CPlusPlus) { 6950d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson if (const RecordType *RT = Ty->getAs<RecordType>()) { 696e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor CXXRecordDecl *Record = cast<CXXRecordDecl>(RT->getDecl()); 697e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor assert((Record->hasTrivialCopyConstructor() || 6981d49f2112572c247ff9c209de112fbf5d9ecf765Fariborz Jahanian Record->hasTrivialCopyAssignment()) && 699e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor "Trying to aggregate-copy a type without a trivial copy " 700e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor "constructor or assignment operator"); 701419aa964ae845aa5b1183fabb2f1cff78faaedddDouglas Gregor // Ignore empty classes in C++. 702e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor if (Record->isEmpty()) 7030d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson return; 7040d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson } 7050d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson } 7060d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson 70783c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // Aggregate assignment turns into llvm.memcpy. This is almost valid per 708ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // C99 6.5.16.1p3, which states "If the value being stored in an object is 709ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // read from another object that overlaps in anyway the storage of the first 710ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // object, then the overlap shall be exact and the two objects shall have 711ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // qualified or unqualified versions of a compatible type." 712ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // 71383c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // memcpy is not defined if the source and destination pointers are exactly 714ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // equal, but other compilers do this optimization, and almost every memcpy 715ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // implementation handles this case safely. If there is a libc that does not 716ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // safely handle this, we can add a target hook. 7171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7187482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Get size and alignment info for this aggregate. 7197482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar std::pair<uint64_t, unsigned> TypeInfo = getContext().getTypeInfo(Ty); 7201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7217482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // FIXME: Handle variable sized types. 7221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 723fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // FIXME: If we have a volatile struct, the optimizer can remove what might 724fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // appear to be `extra' memory ops: 725fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 726fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // volatile struct { int i; } a, b; 727fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 728fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // int main() { 729fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 730fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 731fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // } 732fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 7333ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang // we need to use a different call here. We use isVolatile to indicate when 73449d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // either the source or the destination is volatile. 7353ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 7363ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::PointerType *DPT = cast<llvm::PointerType>(DestPtr->getType()); 737098432c3119cd4e421a2b906d06187b004d3a86bChris Lattner const llvm::Type *DBP = 738098432c3119cd4e421a2b906d06187b004d3a86bChris Lattner llvm::Type::getInt8PtrTy(VMContext, DPT->getAddressSpace()); 739098432c3119cd4e421a2b906d06187b004d3a86bChris Lattner DestPtr = Builder.CreateBitCast(DestPtr, DBP, "tmp"); 7403ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 7413ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::PointerType *SPT = cast<llvm::PointerType>(SrcPtr->getType()); 742098432c3119cd4e421a2b906d06187b004d3a86bChris Lattner const llvm::Type *SBP = 743098432c3119cd4e421a2b906d06187b004d3a86bChris Lattner llvm::Type::getInt8PtrTy(VMContext, SPT->getAddressSpace()); 744098432c3119cd4e421a2b906d06187b004d3a86bChris Lattner SrcPtr = Builder.CreateBitCast(SrcPtr, SBP, "tmp"); 7453ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 74655bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian if (const RecordType *RecordTy = Ty->getAs<RecordType>()) { 74755bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian RecordDecl *Record = RecordTy->getDecl(); 74855bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian if (Record->hasObjectMember()) { 74955bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian unsigned long size = TypeInfo.first/8; 75055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian const llvm::Type *SizeTy = ConvertType(getContext().getSizeType()); 75155bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian llvm::Value *SizeVal = llvm::ConstantInt::get(SizeTy, size); 75255bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian CGM.getObjCRuntime().EmitGCMemmoveCollectable(*this, DestPtr, SrcPtr, 75355bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian SizeVal); 75455bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian return; 75555bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 75655bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } else if (getContext().getAsArrayType(Ty)) { 75755bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian QualType BaseType = getContext().getBaseElementType(Ty); 75855bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian if (const RecordType *RecordTy = BaseType->getAs<RecordType>()) { 75955bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian if (RecordTy->getDecl()->hasObjectMember()) { 76055bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian unsigned long size = TypeInfo.first/8; 76155bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian const llvm::Type *SizeTy = ConvertType(getContext().getSizeType()); 76255bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian llvm::Value *SizeVal = llvm::ConstantInt::get(SizeTy, size); 76355bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian CGM.getObjCRuntime().EmitGCMemmoveCollectable(*this, DestPtr, SrcPtr, 76455bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian SizeVal); 76555bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian return; 76655bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 76755bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 76855bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian } 76955bcace250e1ff366e4482714b344b8cbc8be5f3Fariborz Jahanian 7703ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang Builder.CreateCall5(CGM.getMemCpyFn(DestPtr->getType(), SrcPtr->getType(), 77177b89b87c3b9220fea1bc80f6d6598d2003cc8a8Chris Lattner IntPtrTy), 7727482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr, SrcPtr, 7737482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // TypeInfo.first describes size in bits. 77477b89b87c3b9220fea1bc80f6d6598d2003cc8a8Chris Lattner llvm::ConstantInt::get(IntPtrTy, TypeInfo.first/8), 775098432c3119cd4e421a2b906d06187b004d3a86bChris Lattner Builder.getInt32(TypeInfo.second/8), 776098432c3119cd4e421a2b906d06187b004d3a86bChris Lattner Builder.getInt1(isVolatile)); 7777482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 778