CGExprAgg.cpp revision c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068
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" 239c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner#include "llvm/Support/Compiler.h" 24f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner#include "llvm/Intrinsics.h" 25af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattnerusing namespace clang; 26af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattnerusing namespace CodeGen; 27883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 289c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner//===----------------------------------------------------------------------===// 299c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner// Aggregate Expression Emitter 309c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner//===----------------------------------------------------------------------===// 319c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 329c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnernamespace { 339c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnerclass VISIBILITY_HIDDEN AggExprEmitter : public StmtVisitor<AggExprEmitter> { 349c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CodeGenFunction &CGF; 3545d196b8387dcefc4df26cda114fa34c6528e928Daniel Dunbar CGBuilderTy &Builder; 369c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner llvm::Value *DestPtr; 379c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner bool VolatileDest; 3849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump bool IgnoreResult; 3914c5cbf59cffee52275230922283a247de407712Anders Carlsson bool IsInitializer; 4008c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection; 419c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnerpublic: 42ff4bf3bd6174f6a02da4ee2efc6064c005295d44Mike Stump AggExprEmitter(CodeGenFunction &cgf, llvm::Value *destPtr, bool v, 4308c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool ignore, bool isinit, bool requiresGCollection) 44bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner : CGF(cgf), Builder(CGF.Builder), 4514c5cbf59cffee52275230922283a247de407712Anders Carlsson DestPtr(destPtr), VolatileDest(v), IgnoreResult(ignore), 4608c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian IsInitializer(isinit), RequiresGCollection(requiresGCollection) { 479c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner } 489c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 49ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 50ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner // Utilities 51ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 52ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 539c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// EmitAggLoadOfLValue - Given an expression with aggregate type that 549c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// represents a value lvalue, this method emits the address of the lvalue, 559c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// then loads the result into DestPtr. 569c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void EmitAggLoadOfLValue(const Expr *E); 57922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 584ac20ddc7ab324a59862657f756bdd060076b137Mike Stump /// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 5949d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump void EmitFinalDestCopy(const Expr *E, LValue Src, bool Ignore = false); 6049d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump void EmitFinalDestCopy(const Expr *E, RValue Src, bool Ignore = false); 614ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 62ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 63ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner // Visitor Methods 64ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 669c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitStmt(Stmt *S) { 67488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar CGF.ErrorUnsupported(S, "aggregate expression"); 689c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner } 699c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitParenExpr(ParenExpr *PE) { Visit(PE->getSubExpr()); } 7012444a24419fe88b42a16b46106db3c11ac5cd35Eli Friedman void VisitUnaryExtension(UnaryOperator *E) { Visit(E->getSubExpr()); } 719c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 729c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // l-values. 739b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitDeclRefExpr(DeclRefExpr *DRE) { EmitAggLoadOfLValue(DRE); } 749b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitMemberExpr(MemberExpr *ME) { EmitAggLoadOfLValue(ME); } 759b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitUnaryDeref(UnaryOperator *E) { EmitAggLoadOfLValue(E); } 76ad6ebd6efcc30cc54540ed9d92256b410519ec0fSeo Sanghyeon void VisitStringLiteral(StringLiteral *E) { EmitAggLoadOfLValue(E); } 77f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump EmitAggLoadOfLValue(E); 79f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 809b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 819b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon EmitAggLoadOfLValue(E); 829b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon } 83f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitBlockDeclRefExpr(const BlockDeclRefExpr *E) { 841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump EmitAggLoadOfLValue(E); 85f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 86f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitPredefinedExpr(const PredefinedExpr *E) { 871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump EmitAggLoadOfLValue(E); 88f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 909c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // Operators. 914d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson void VisitCastExpr(CastExpr *E); 92148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson void VisitCallExpr(const CallExpr *E); 93b2d963f527674275c9109252474948368b6e6161Chris Lattner void VisitStmtExpr(const StmtExpr *E); 949c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitBinaryOperator(const BinaryOperator *BO); 958bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian void VisitPointerToDataMemberBinaryOperator(const BinaryOperator *BO); 9603d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattner void VisitBinAssign(const BinaryOperator *E); 9707fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman void VisitBinComma(const BinaryOperator *E); 98a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson void VisitUnaryAddrOf(const UnaryOperator *E); 999c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 1008fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner void VisitObjCMessageExpr(ObjCMessageExpr *E); 1010a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar void VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { 1020a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar EmitAggLoadOfLValue(E); 1030a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar } 1049c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar void VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E); 10509105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian void VisitObjCImplicitSetterGetterRefExpr(ObjCImplicitSetterGetterRefExpr *E); 1061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1079c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitConditionalOperator(const ConditionalOperator *CO); 108a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson void VisitChooseExpr(const ChooseExpr *CE); 109636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel void VisitInitListExpr(InitListExpr *E); 11004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { 11104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Visit(DAE->getExpr()); 11204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner } 113b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E); 11431ccf377f4a676eb6c205b47eef435de616d5e2dAnders Carlsson void VisitCXXConstructExpr(const CXXConstructExpr *E); 1157f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson void VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E); 116329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes void VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E); 1172710c4159ff4761ba9867aca18f60a178b297686Mike Stump void VisitCXXTypeidExpr(CXXTypeidExpr *E) { EmitAggLoadOfLValue(E); } 1187f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 119b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman void VisitVAArgExpr(VAArgExpr *E); 120f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 121f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitInitializationToLValue(Expr *E, LValue Address); 122f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitNullInitializationToLValue(LValue Address, QualType T); 1239c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // case Expr::ChooseExprClass: 124305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 1259c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner}; 1269c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner} // end anonymous namespace. 1279c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 128ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 129ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Utilities 130ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 1319c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 132883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// EmitAggLoadOfLValue - Given an expression with aggregate type that 133883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// represents a value lvalue, this method emits the address of the lvalue, 134883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// then loads the result into DestPtr. 1359c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::EmitAggLoadOfLValue(const Expr *E) { 1369c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LV = CGF.EmitLValue(E); 1374ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, LV); 1384ac20ddc7ab324a59862657f756bdd060076b137Mike Stump} 1394ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 1404ac20ddc7ab324a59862657f756bdd060076b137Mike Stump/// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 14149d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stumpvoid AggExprEmitter::EmitFinalDestCopy(const Expr *E, RValue Src, bool Ignore) { 1424ac20ddc7ab324a59862657f756bdd060076b137Mike Stump assert(Src.isAggregate() && "value must be aggregate value!"); 1434ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 144883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // If the result is ignored, don't copy from the value. 1459ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump if (DestPtr == 0) { 14649d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump if (!Src.isVolatileQualified() || (IgnoreResult && Ignore)) 1479ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump return; 14849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // If the source is volatile, we must read from it; to do that, we need 14949d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // some place to put it. 15049d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump DestPtr = CGF.CreateTempAlloca(CGF.ConvertType(E->getType()), "agg.tmp"); 1519ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump } 152883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 15308c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian if (RequiresGCollection) { 15408c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian CGF.CGM.getObjCRuntime().EmitGCMemmoveCollectable(CGF, 15508c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian DestPtr, Src.getAggregateAddr(), 15608c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian E->getType()); 15708c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian return; 15808c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian } 1594ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // If the result of the assignment is used, copy the LHS there also. 1604ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // FIXME: Pass VolatileDest as well. I think we also need to merge volatile 1614ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // from the source as well, as we can't eliminate it if either operand 1624ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // is volatile, unless copy has volatile for both source and destination.. 16327fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump CGF.EmitAggregateCopy(DestPtr, Src.getAggregateAddr(), E->getType(), 16427fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump VolatileDest|Src.isVolatileQualified()); 1654ac20ddc7ab324a59862657f756bdd060076b137Mike Stump} 1664ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 1674ac20ddc7ab324a59862657f756bdd060076b137Mike Stump/// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 16849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stumpvoid AggExprEmitter::EmitFinalDestCopy(const Expr *E, LValue Src, bool Ignore) { 1694ac20ddc7ab324a59862657f756bdd060076b137Mike Stump assert(Src.isSimple() && "Can't have aggregate bitfield, vector, etc"); 1704ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 1714ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RValue::getAggregate(Src.getAddress(), 17249d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump Src.isVolatileQualified()), 17349d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump Ignore); 174883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 175883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 176ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 177ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Visitor Methods 178ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 179ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 1804d8673b645ad86e496b886a0f80b60763f67071dAnders Carlssonvoid AggExprEmitter::VisitCastExpr(CastExpr *E) { 1813016842613674ab80796567239c15d529aff1458Anders Carlsson switch (E->getCastKind()) { 1823016842613674ab80796567239c15d529aff1458Anders Carlsson default: assert(0 && "Unhandled cast kind!"); 1833016842613674ab80796567239c15d529aff1458Anders Carlsson 1843016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_ToUnion: { 1854d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // GCC union extension 18634ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman QualType PtrTy = 1873016842613674ab80796567239c15d529aff1458Anders Carlsson CGF.getContext().getPointerType(E->getSubExpr()->getType()); 18834ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman llvm::Value *CastPtr = Builder.CreateBitCast(DestPtr, 18934ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman CGF.ConvertType(PtrTy)); 190c6a38a47bf3908ab2183d7946498138d8b07c886Mon P Wang EmitInitializationToLValue(E->getSubExpr(), 1910953e767ff7817f97b3ab20896b229891eeff45bJohn McCall LValue::MakeAddr(CastPtr, Qualifiers())); 1923016842613674ab80796567239c15d529aff1458Anders Carlsson break; 1937e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes } 1941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1954d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // FIXME: Remove the CK_Unknown check here. 1963016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_Unknown: 1973016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_NoOp: 1983016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_UserDefinedConversion: 1993016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_ConstructorConversion: 2003016842613674ab80796567239c15d529aff1458Anders Carlsson assert(CGF.getContext().hasSameUnqualifiedType(E->getSubExpr()->getType(), 2013016842613674ab80796567239c15d529aff1458Anders Carlsson E->getType()) && 2023016842613674ab80796567239c15d529aff1458Anders Carlsson "Implicit cast types must be compatible"); 2033016842613674ab80796567239c15d529aff1458Anders Carlsson Visit(E->getSubExpr()); 2043016842613674ab80796567239c15d529aff1458Anders Carlsson break; 205e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 206e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson case CastExpr::CK_NullToMemberPointer: { 207e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson const llvm::Type *PtrDiffTy = 208e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 209e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 210e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *NullValue = llvm::Constant::getNullValue(PtrDiffTy); 211e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *Ptr = Builder.CreateStructGEP(DestPtr, 0, "ptr"); 212e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson Builder.CreateStore(NullValue, Ptr, VolatileDest); 213e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 214e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *Adj = Builder.CreateStructGEP(DestPtr, 1, "adj"); 215e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson Builder.CreateStore(NullValue, Adj, VolatileDest); 216e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 217e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson break; 218e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson } 21984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 220bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson case CastExpr::CK_BitCast: { 221bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson // This must be a member function pointer cast. 222bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson Visit(E->getSubExpr()); 223bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson break; 224bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson } 225bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson 226c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman case CastExpr::CK_DerivedToBaseMemberPointer: 22784080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson case CastExpr::CK_BaseToDerivedMemberPointer: { 22884080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson QualType SrcType = E->getSubExpr()->getType(); 22984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 23084080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *Src = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(SrcType), 23184080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson "tmp"); 23284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson CGF.EmitAggExpr(E->getSubExpr(), Src, SrcType.isVolatileQualified()); 23384080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 23484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *SrcPtr = Builder.CreateStructGEP(Src, 0, "src.ptr"); 23584080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson SrcPtr = Builder.CreateLoad(SrcPtr); 23684080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 23784080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *SrcAdj = Builder.CreateStructGEP(Src, 1, "src.adj"); 23884080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson SrcAdj = Builder.CreateLoad(SrcAdj); 23984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 24084080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *DstPtr = Builder.CreateStructGEP(DestPtr, 0, "dst.ptr"); 24184080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson Builder.CreateStore(SrcPtr, DstPtr, VolatileDest); 24284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 24384080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *DstAdj = Builder.CreateStructGEP(DestPtr, 1, "dst.adj"); 24484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 24584080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson // Now See if we need to update the adjustment. 246c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman const CXXRecordDecl *BaseDecl = 24784080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson cast<CXXRecordDecl>(SrcType->getAs<MemberPointerType>()-> 24884080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson getClass()->getAs<RecordType>()->getDecl()); 249c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman const CXXRecordDecl *DerivedDecl = 25084080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson cast<CXXRecordDecl>(E->getType()->getAs<MemberPointerType>()-> 25184080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson getClass()->getAs<RecordType>()->getDecl()); 252c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman if (E->getCastKind() == CastExpr::CK_DerivedToBaseMemberPointer) 253c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman std::swap(DerivedDecl, BaseDecl); 254c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman 255c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman llvm::Constant *Adj = CGF.CGM.GetCXXBaseClassOffset(DerivedDecl, BaseDecl); 256c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman if (Adj) { 257c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman if (E->getCastKind() == CastExpr::CK_DerivedToBaseMemberPointer) 258c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman SrcAdj = Builder.CreateSub(SrcAdj, Adj, "adj"); 259c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman else 260c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman SrcAdj = Builder.CreateAdd(SrcAdj, Adj, "adj"); 261c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman } 26284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 26384080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson Builder.CreateStore(SrcAdj, DstAdj, VolatileDest); 26484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson break; 26584080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson } 2663016842613674ab80796567239c15d529aff1458Anders Carlsson } 267e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson} 268e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson 2699619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitCallExpr(const CallExpr *E) { 270e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson if (E->getCallReturnType()->isReferenceType()) { 271e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson EmitAggLoadOfLValue(E); 272e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson return; 273e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson } 2741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 275148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson RValue RV = CGF.EmitCallExpr(E); 2764ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 277796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman} 2789619662a1d42e2008b865d3459c0677e149dad1bChris Lattner 2799619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) { 2808f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar RValue RV = CGF.EmitObjCMessageExpr(E); 2814ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 2828fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 283796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 2849c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbarvoid AggExprEmitter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 2859c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar RValue RV = CGF.EmitObjCPropertyGet(E); 2864ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 2875daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian} 2885daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 28909105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanianvoid AggExprEmitter::VisitObjCImplicitSetterGetterRefExpr( 29009105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian ObjCImplicitSetterGetterRefExpr *E) { 2915daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian RValue RV = CGF.EmitObjCPropertyGet(E); 2924ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 293148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson} 294148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 2959619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitBinComma(const BinaryOperator *E) { 2967f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitAnyExpr(E->getLHS(), 0, false, true); 29714c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.EmitAggExpr(E->getRHS(), DestPtr, VolatileDest, 29814c5cbf59cffee52275230922283a247de407712Anders Carlsson /*IgnoreResult=*/false, IsInitializer); 29907fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman} 30007fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman 301a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlssonvoid AggExprEmitter::VisitUnaryAddrOf(const UnaryOperator *E) { 302a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson // We have a member function pointer. 303a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson const MemberPointerType *MPT = E->getType()->getAs<MemberPointerType>(); 304babac13bb332974c8bb800b1a9714bcdf5afefccDaniel Dunbar (void) MPT; 305a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson assert(MPT->getPointeeType()->isFunctionProtoType() && 306a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson "Unexpected member pointer type!"); 307a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 308a2813cec2605ce7878d1b13471d685f689b251afDouglas Gregor const DeclRefExpr *DRE = cast<DeclRefExpr>(E->getSubExpr()); 309a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson const CXXMethodDecl *MD = cast<CXXMethodDecl>(DRE->getDecl()); 310a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 311a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson const llvm::Type *PtrDiffTy = 312a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 313a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 314a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *DstPtr = Builder.CreateStructGEP(DestPtr, 0, "dst.ptr"); 315a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *FuncPtr; 316a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 317a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson if (MD->isVirtual()) { 318dbd920c7758e6dfb678a8f503fb14ba97c26f23aAnders Carlsson int64_t Index = 319dbd920c7758e6dfb678a8f503fb14ba97c26f23aAnders Carlsson CGF.CGM.getVtableInfo().getMethodVtableIndex(MD); 320a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 321a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson FuncPtr = llvm::ConstantInt::get(PtrDiffTy, Index + 1); 322a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson } else { 323a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson FuncPtr = llvm::ConstantExpr::getPtrToInt(CGF.CGM.GetAddrOfFunction(MD), 324a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson PtrDiffTy); 325a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson } 326a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson Builder.CreateStore(FuncPtr, DstPtr, VolatileDest); 327a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 328a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *AdjPtr = Builder.CreateStructGEP(DestPtr, 1, "dst.adj"); 329a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 330a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson // The adjustment will always be 0. 331a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson Builder.CreateStore(llvm::ConstantInt::get(PtrDiffTy, 0), AdjPtr, 332a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson VolatileDest); 333a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson} 334a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 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) 3667f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(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) 37343f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(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; 379082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian if (CGF.getContext().getLangOptions().NeXTRuntime) { 380082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian QualType LHSTy = E->getLHS()->getType(); 3816217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek if (const RecordType *FDTTy = LHSTy.getTypePtr()->getAs<RecordType>()) 3821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump RequiresGCollection = FDTTy->getDecl()->hasObjectMember(); 383082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian } 3847f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // Codegen the RHS so that it stores directly into the LHS. 38508c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian CGF.EmitAggExpr(E->getRHS(), LHS.getAddress(), LHS.isVolatileQualified(), 38608c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian false, false, RequiresGCollection); 38749d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump EmitFinalDestCopy(E, LHS, true); 3887f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } 389883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 390883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 3919c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitConditionalOperator(const ConditionalOperator *E) { 3929615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 3939615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 3949615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 3951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3969c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner llvm::Value *Cond = CGF.EvaluateExprAsBool(E->getCond()); 397bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner Builder.CreateCondBr(Cond, LHSBlock, RHSBlock); 3981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 399a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.StartConditionalBranch(); 4009c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(LHSBlock); 4011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 402883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // Handle the GNU extension for missing LHS. 403883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(E->getLHS() && "Must have LHS for aggregate value"); 404883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 405c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getLHS()); 406a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.FinishConditionalBranch(); 407d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 4081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 409a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.StartConditionalBranch(); 4109c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(RHSBlock); 4111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 412c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getRHS()); 413a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.FinishConditionalBranch(); 414d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 4151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4169c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(ContBlock); 417883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 418ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 419a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlssonvoid AggExprEmitter::VisitChooseExpr(const ChooseExpr *CE) { 420a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson Visit(CE->getChosenSubExpr(CGF.getContext())); 421a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson} 422a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson 423b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedmanvoid AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 4240785570af3ef5f8c5a0377129e41efe6f3f8d770Daniel Dunbar llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); 425ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 426ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 4270262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl if (!ArgPtr) { 428ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.ErrorUnsupported(VE, "aggregate va_arg expression"); 4290262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl return; 4300262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl } 4310262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl 4320953e767ff7817f97b3ab20896b229891eeff45bJohn McCall EmitFinalDestCopy(VE, LValue::MakeAddr(ArgPtr, Qualifiers())); 433b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman} 434b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman 435b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlssonvoid AggExprEmitter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { 436b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 4371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 438b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 439b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 440b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 441b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 442b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // FIXME: volatile 443b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitAggExpr(E->getSubExpr(), Val, false); 4441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 445b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Visit(E->getSubExpr()); 4461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 44714c5cbf59cffee52275230922283a247de407712Anders Carlsson // Don't make this a live temporary if we're emitting an initializer expr. 44814c5cbf59cffee52275230922283a247de407712Anders Carlsson if (!IsInitializer) 44914c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.PushCXXTemporary(E->getTemporary(), Val); 450b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson} 451b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 452b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlssonvoid 45331ccf377f4a676eb6c205b47eef435de616d5e2dAnders CarlssonAggExprEmitter::VisitCXXConstructExpr(const CXXConstructExpr *E) { 454b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 4551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 456b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 457b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 458b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 459b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson } 4608e587a15da6d3457a418239d5eb4146fcbd209f3Anders Carlsson 461b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitCXXConstructExpr(Val, E); 4627f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson} 4637f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 4647f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlssonvoid AggExprEmitter::VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) { 46514c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.EmitCXXExprWithTemporaries(E, DestPtr, VolatileDest, IsInitializer); 466b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson} 467b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson 468329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopesvoid AggExprEmitter::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) { 469329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes LValue lvalue = LValue::MakeAddr(DestPtr, Qualifiers()); 470329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes EmitNullInitializationToLValue(lvalue, E->getType()); 471329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes} 472329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes 473f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV) { 4747f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // FIXME: Ignore result? 475f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // FIXME: Are initializers affected by volatile? 4763498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor if (isa<ImplicitValueInitExpr>(E)) { 4774c67834407ca6ab344dcf44fc599ad4938cfa96dDouglas Gregor EmitNullInitializationToLValue(LV, E->getType()); 4783498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor } else if (E->getType()->isComplexType()) { 4793498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false); 480c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else if (CGF.hasAggregateLLVMType(E->getType())) { 481c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitAnyExpr(E, LV.getAddress(), false); 482c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else { 483c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitStoreThroughLValue(CGF.EmitAnyExpr(E), LV, E->getType()); 484f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 485f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 486305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 487f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitNullInitializationToLValue(LValue LV, QualType T) { 488f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (!CGF.hasAggregateLLVMType(T)) { 489f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // For non-aggregates, we can store zero 490c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson llvm::Value *Null = llvm::Constant::getNullValue(CGF.ConvertType(T)); 49182397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Null), LV, T); 492f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 493f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Otherwise, just memset the whole thing to zero. This is legal 494f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // because in LLVM, all default initializers are guaranteed to have a 495f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // bit pattern of all zeros. 4960f59312e7b625fa5821a63db65377d4b3b667e99Eli Friedman // FIXME: That isn't true for member pointers! 497f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // There's a potential optimization opportunity in combining 498f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // memsets; that would be easy for arrays, but relatively 499f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // difficult for structures with the current code. 500ccf0ed885952a52caa25767c787e0bf29f4688bdEli Friedman CGF.EmitMemSetToZero(LV.getAddress(), T); 501f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 502f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 503305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 504f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::VisitInitListExpr(InitListExpr *E) { 505a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#if 0 5061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // FIXME: Disabled while we figure out what to do about 507a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // test/CodeGen/bitfield.c 508a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // 509f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // If we can, prefer a copy from a global; this is a lot less code for long 510f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // globals, and it's easier for the current optimizers to analyze. 511f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: Should we really be doing this? Should we try to avoid cases where 512f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // we emit a global with a lot of zeros? Should we try to avoid short 513f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // globals? 514c9e8f606787b0bc0c3b08e566b87cc1751694168Eli Friedman if (E->isConstantInitializer(CGF.getContext(), 0)) { 515994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::Constant* C = CGF.CGM.EmitConstantExpr(E, &CGF); 516994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalVariable* GV = 517994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman new llvm::GlobalVariable(C->getType(), true, 518994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalValue::InternalLinkage, 519994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman C, "", &CGF.CGM.getModule(), 0); 5204ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, LValue::MakeAddr(GV, 0)); 521994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman return; 522994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman } 523a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#endif 524a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor if (E->hadArrayRangeDesignator()) { 525a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor CGF.ErrorUnsupported(E, "GNU array range designator extension"); 526a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor } 527a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor 528f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Handle initialization of an array. 529f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isArrayType()) { 530f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::PointerType *APType = 531f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::PointerType>(DestPtr->getType()); 532f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::ArrayType *AType = 533f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::ArrayType>(APType->getElementType()); 5341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 535f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumInitElements = E->getNumInits(); 536922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 5379619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (E->getNumInits() > 0) { 5389619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T1 = E->getType(); 5399619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T2 = E->getInit(0)->getType(); 5402dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman if (CGF.getContext().hasSameUnqualifiedType(T1, T2)) { 5419619662a1d42e2008b865d3459c0677e149dad1bChris Lattner EmitAggLoadOfLValue(E->getInit(0)); 5429619662a1d42e2008b865d3459c0677e149dad1bChris Lattner return; 5439619662a1d42e2008b865d3459c0677e149dad1bChris Lattner } 544922696f03ec9637449e2cba260493808b4977cd3Eli Friedman } 545922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 546f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumArrayElements = AType->getNumElements(); 547c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType ElementType = CGF.getContext().getCanonicalType(E->getType()); 5484c67834407ca6ab344dcf44fc599ad4938cfa96dDouglas Gregor ElementType = CGF.getContext().getAsArrayType(ElementType)->getElementType(); 5491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5500953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // FIXME: were we intentionally ignoring address spaces and GC attributes? 5510953e767ff7817f97b3ab20896b229891eeff45bJohn McCall Qualifiers Quals = CGF.MakeQualifiers(ElementType); 5521e692ace08959399794363e77499b73da5494af9Eli Friedman 553f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (uint64_t i = 0; i != NumArrayElements; ++i) { 554f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 555f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (i < NumInitElements) 5561e692ace08959399794363e77499b73da5494af9Eli Friedman EmitInitializationToLValue(E->getInit(i), 5570953e767ff7817f97b3ab20896b229891eeff45bJohn McCall LValue::MakeAddr(NextVal, Quals)); 558f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner else 5590953e767ff7817f97b3ab20896b229891eeff45bJohn McCall EmitNullInitializationToLValue(LValue::MakeAddr(NextVal, Quals), 560f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner ElementType); 561f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 562305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio return; 563f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 5641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 565f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner assert(E->getType()->isRecordType() && "Only support structs/unions here!"); 5661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 567f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Do struct initialization; this code just sets each individual member 568f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // to the approprate value. This makes bitfield support automatic; 569f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the disadvantage is that the generated code is more difficult for 570f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the optimizer, especially with bitfields. 571f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumInitElements = E->getNumInits(); 5726217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *SD = E->getType()->getAs<RecordType>()->getDecl(); 573f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned CurInitVal = 0; 5740bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 5750bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (E->getType()->isUnionType()) { 5760bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Only initialize one field of a union. The field itself is 5770bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // specified by the initializer list. 5780bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (!E->getInitializedFieldInUnion()) { 5790bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Empty union; we have nothing to do. 5801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5810bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#ifndef NDEBUG 5820bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Make sure that it's really an empty and not a failure of 5830bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // semantic analysis. 58417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 58517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 5860bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor Field != FieldEnd; ++Field) 5870bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor assert(Field->isUnnamedBitfield() && "Only unnamed bitfields allowed"); 5880bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#endif 5890bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 5900bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 5910bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 5920bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // FIXME: volatility 5930bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor FieldDecl *Field = E->getInitializedFieldInUnion(); 5940bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor LValue FieldLoc = CGF.EmitLValueForField(DestPtr, Field, true, 0); 5950bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 5960bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (NumInitElements) { 5970bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Store the initializer into the field 5980bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor EmitInitializationToLValue(E->getInit(0), FieldLoc); 5990bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } else { 6000bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Default-initialize to null 6010bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 6020bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6030bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6040bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 6050bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 607f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Here we iterate over the fields; this makes it simpler to both 608f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // default-initialize fields and skip over unnamed fields. 60917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 61017945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 61144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; ++Field) { 61244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // We're done once we hit the flexible array member 61344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (Field->getType()->isIncompleteArrayType()) 61444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor break; 61544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 61634e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor if (Field->isUnnamedBitfield()) 617f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner continue; 61834e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor 6191e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 6200bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor LValue FieldLoc = CGF.EmitLValueForField(DestPtr, *Field, false, 0); 62114674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian // We never generate write-barries for initialized fields. 62214674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian LValue::SetObjCNonGC(FieldLoc, true); 623f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurInitVal < NumInitElements) { 624f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Store the initializer into the field 625f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner EmitInitializationToLValue(E->getInit(CurInitVal++), FieldLoc); 626f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 627f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // We're out of initalizers; default-initialize to null 62844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 629f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 630145cd89f9233d375381aa13bd28b2d36f83e6181Lauro Ramos Venancio } 631636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel} 632636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 633ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 634ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Entry Points into this File 635ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 636ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 637e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// EmitAggExpr - Emit the computation of the specified expression of aggregate 638e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// type. The result is computed into DestPtr. Note that if DestPtr is null, 639e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// the value of the aggregate expression is not needed. If VolatileDest is 640e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// true, DestPtr cannot be 0. 641ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattnervoid CodeGenFunction::EmitAggExpr(const Expr *E, llvm::Value *DestPtr, 64214c5cbf59cffee52275230922283a247de407712Anders Carlsson bool VolatileDest, bool IgnoreResult, 6431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool IsInitializer, 64408c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection) { 645ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner assert(E && hasAggregateLLVMType(E->getType()) && 646ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner "Invalid aggregate expression to emit"); 647e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump assert ((DestPtr != 0 || VolatileDest == false) 648e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump && "volatile aggregate can't be 0"); 6491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 65008c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian AggExprEmitter(*this, DestPtr, VolatileDest, IgnoreResult, IsInitializer, 65108c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian RequiresGCollection) 65249d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump .Visit(const_cast<Expr*>(E)); 653ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 6547482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 6557482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateClear(llvm::Value *DestPtr, QualType Ty) { 6567482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 6577482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 6587482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar EmitMemSetToZero(DestPtr, Ty); 6597482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 6607482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 6617482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr, 66227fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump llvm::Value *SrcPtr, QualType Ty, 66327fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump bool isVolatile) { 6647482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 6651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 66683c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // Aggregate assignment turns into llvm.memcpy. This is almost valid per 667ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // C99 6.5.16.1p3, which states "If the value being stored in an object is 668ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // read from another object that overlaps in anyway the storage of the first 669ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // object, then the overlap shall be exact and the two objects shall have 670ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // qualified or unqualified versions of a compatible type." 671ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // 67283c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // memcpy is not defined if the source and destination pointers are exactly 673ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // equal, but other compilers do this optimization, and almost every memcpy 674ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // implementation handles this case safely. If there is a libc that does not 675ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // safely handle this, we can add a target hook. 6763c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *BP = llvm::Type::getInt8PtrTy(VMContext); 6777482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (DestPtr->getType() != BP) 6787482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr = Builder.CreateBitCast(DestPtr, BP, "tmp"); 6797482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (SrcPtr->getType() != BP) 6807482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar SrcPtr = Builder.CreateBitCast(SrcPtr, BP, "tmp"); 6811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6827482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Get size and alignment info for this aggregate. 6837482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar std::pair<uint64_t, unsigned> TypeInfo = getContext().getTypeInfo(Ty); 6841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6857482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // FIXME: Handle variable sized types. 6860032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = 6870032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::IntegerType::get(VMContext, LLVMPointerWidth); 6881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 689fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // FIXME: If we have a volatile struct, the optimizer can remove what might 690fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // appear to be `extra' memory ops: 691fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 692fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // volatile struct { int i; } a, b; 693fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 694fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // int main() { 695fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 696fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 697fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // } 698fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 69949d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // we need to use a differnt call here. We use isVolatile to indicate when 70049d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // either the source or the destination is volatile. 701ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner Builder.CreateCall4(CGM.getMemCpyFn(), 7027482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr, SrcPtr, 7037482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // TypeInfo.first describes size in bits. 7044a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::ConstantInt::get(IntPtr, TypeInfo.first/8), 7051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 7067482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar TypeInfo.second/8)); 7077482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 708