CGExprAgg.cpp revision 7af4ec744e30d573482aef7a37089d0d32cc07ef
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; 409c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnerpublic: 41ff4bf3bd6174f6a02da4ee2efc6064c005295d44Mike Stump AggExprEmitter(CodeGenFunction &cgf, llvm::Value *destPtr, bool v, 4208c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool ignore, bool isinit, bool requiresGCollection) 43bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner : CGF(cgf), Builder(CGF.Builder), 4414c5cbf59cffee52275230922283a247de407712Anders Carlsson DestPtr(destPtr), VolatileDest(v), IgnoreResult(ignore), 4508c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian IsInitializer(isinit), RequiresGCollection(requiresGCollection) { 469c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner } 479c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 48ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 49ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner // Utilities 50ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 51ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 529c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// EmitAggLoadOfLValue - Given an expression with aggregate type that 539c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// represents a value lvalue, this method emits the address of the lvalue, 549c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner /// then loads the result into DestPtr. 559c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void EmitAggLoadOfLValue(const Expr *E); 56922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 574ac20ddc7ab324a59862657f756bdd060076b137Mike Stump /// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 5849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump void EmitFinalDestCopy(const Expr *E, LValue Src, bool Ignore = false); 5949d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump void EmitFinalDestCopy(const Expr *E, RValue Src, bool Ignore = false); 604ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 61ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 62ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner // Visitor Methods 63ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner //===--------------------------------------------------------------------===// 641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 659c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitStmt(Stmt *S) { 66488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar CGF.ErrorUnsupported(S, "aggregate expression"); 679c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner } 689c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitParenExpr(ParenExpr *PE) { Visit(PE->getSubExpr()); } 6912444a24419fe88b42a16b46106db3c11ac5cd35Eli Friedman void VisitUnaryExtension(UnaryOperator *E) { Visit(E->getSubExpr()); } 709c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 719c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // l-values. 729b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitDeclRefExpr(DeclRefExpr *DRE) { EmitAggLoadOfLValue(DRE); } 739b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitMemberExpr(MemberExpr *ME) { EmitAggLoadOfLValue(ME); } 749b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitUnaryDeref(UnaryOperator *E) { EmitAggLoadOfLValue(E); } 755be028f84243e0f6906c259e67cbdaf9bee431b2Daniel Dunbar void VisitStringLiteral(StringLiteral *E) { EmitAggLoadOfLValue(E); } 76f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump EmitAggLoadOfLValue(E); 78f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 799b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 809b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon EmitAggLoadOfLValue(E); 819b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon } 82f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitBlockDeclRefExpr(const BlockDeclRefExpr *E) { 831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump EmitAggLoadOfLValue(E); 84f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 85f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitPredefinedExpr(const PredefinedExpr *E) { 861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump EmitAggLoadOfLValue(E); 87f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 899c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // Operators. 904d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson void VisitCastExpr(CastExpr *E); 91148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson void VisitCallExpr(const CallExpr *E); 92b2d963f527674275c9109252474948368b6e6161Chris Lattner void VisitStmtExpr(const StmtExpr *E); 939c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitBinaryOperator(const BinaryOperator *BO); 948bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian void VisitPointerToDataMemberBinaryOperator(const BinaryOperator *BO); 9503d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattner void VisitBinAssign(const BinaryOperator *E); 9607fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman void VisitBinComma(const BinaryOperator *E); 97a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson void VisitUnaryAddrOf(const UnaryOperator *E); 989c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 998fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner void VisitObjCMessageExpr(ObjCMessageExpr *E); 1000a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar void VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { 1010a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar EmitAggLoadOfLValue(E); 1020a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar } 1039c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar void VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E); 10409105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian void VisitObjCImplicitSetterGetterRefExpr(ObjCImplicitSetterGetterRefExpr *E); 1051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1069c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitConditionalOperator(const ConditionalOperator *CO); 107a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson void VisitChooseExpr(const ChooseExpr *CE); 108636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel void VisitInitListExpr(InitListExpr *E); 10930311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson void VisitImplicitValueInitExpr(ImplicitValueInitExpr *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: 12439406b1395f69341c045e863a6620310abdc55b6Mike Stump void VisitCXXThrowExpr(const CXXThrowExpr *E) { CGF.EmitCXXThrowExpr(E); } 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 275d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson // If the struct doesn't require GC, we can just pass the destination 276d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson // directly to EmitCall. 277d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson if (!RequiresGCollection) { 278d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson CGF.EmitCallExpr(E, ReturnValueSlot(DestPtr, VolatileDest)); 279d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson return; 280d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson } 281d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson 282148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson RValue RV = CGF.EmitCallExpr(E); 2834ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 284796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman} 2859619662a1d42e2008b865d3459c0677e149dad1bChris Lattner 2869619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) { 2878f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar RValue RV = CGF.EmitObjCMessageExpr(E); 2884ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 2898fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 290796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 2919c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbarvoid AggExprEmitter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 2929c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar RValue RV = CGF.EmitObjCPropertyGet(E); 2934ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 2945daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian} 2955daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 29609105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanianvoid AggExprEmitter::VisitObjCImplicitSetterGetterRefExpr( 29709105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian ObjCImplicitSetterGetterRefExpr *E) { 2985daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian RValue RV = CGF.EmitObjCPropertyGet(E); 2994ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 300148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson} 301148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 3029619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitBinComma(const BinaryOperator *E) { 3037f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitAnyExpr(E->getLHS(), 0, false, true); 30414c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.EmitAggExpr(E->getRHS(), DestPtr, VolatileDest, 30514c5cbf59cffee52275230922283a247de407712Anders Carlsson /*IgnoreResult=*/false, IsInitializer); 30607fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman} 30707fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman 308a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlssonvoid AggExprEmitter::VisitUnaryAddrOf(const UnaryOperator *E) { 309a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson // We have a member function pointer. 310a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson const MemberPointerType *MPT = E->getType()->getAs<MemberPointerType>(); 311babac13bb332974c8bb800b1a9714bcdf5afefccDaniel Dunbar (void) MPT; 312a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson assert(MPT->getPointeeType()->isFunctionProtoType() && 313a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson "Unexpected member pointer type!"); 314a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 315a2813cec2605ce7878d1b13471d685f689b251afDouglas Gregor const DeclRefExpr *DRE = cast<DeclRefExpr>(E->getSubExpr()); 3167af4ec744e30d573482aef7a37089d0d32cc07efAnders Carlsson const CXXMethodDecl *MD = 3177af4ec744e30d573482aef7a37089d0d32cc07efAnders Carlsson cast<CXXMethodDecl>(DRE->getDecl())->getCanonicalDecl(); 318a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 319a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson const llvm::Type *PtrDiffTy = 320a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 321a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 322a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *DstPtr = Builder.CreateStructGEP(DestPtr, 0, "dst.ptr"); 323a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *FuncPtr; 324a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 325a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson if (MD->isVirtual()) { 326dbd920c7758e6dfb678a8f503fb14ba97c26f23aAnders Carlsson int64_t Index = 327dbd920c7758e6dfb678a8f503fb14ba97c26f23aAnders Carlsson CGF.CGM.getVtableInfo().getMethodVtableIndex(MD); 328a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 329a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson FuncPtr = llvm::ConstantInt::get(PtrDiffTy, Index + 1); 330a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson } else { 331a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson FuncPtr = llvm::ConstantExpr::getPtrToInt(CGF.CGM.GetAddrOfFunction(MD), 332a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson PtrDiffTy); 333a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson } 334a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson Builder.CreateStore(FuncPtr, DstPtr, VolatileDest); 335a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 336a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *AdjPtr = Builder.CreateStructGEP(DestPtr, 1, "dst.adj"); 337a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 338a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson // The adjustment will always be 0. 339a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson Builder.CreateStore(llvm::ConstantInt::get(PtrDiffTy, 0), AdjPtr, 340a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson VolatileDest); 341a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson} 342a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 343b2d963f527674275c9109252474948368b6e6161Chris Lattnervoid AggExprEmitter::VisitStmtExpr(const StmtExpr *E) { 344b2d963f527674275c9109252474948368b6e6161Chris Lattner CGF.EmitCompoundStmt(*E->getSubStmt(), true, DestPtr, VolatileDest); 345b2d963f527674275c9109252474948368b6e6161Chris Lattner} 346b2d963f527674275c9109252474948368b6e6161Chris Lattner 3479c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitBinaryOperator(const BinaryOperator *E) { 34852f08bcbb81c750ed62b53ed0b34aff16143b877Fariborz Jahanian if (E->getOpcode() == BinaryOperator::PtrMemD || 34952f08bcbb81c750ed62b53ed0b34aff16143b877Fariborz Jahanian E->getOpcode() == BinaryOperator::PtrMemI) 3508bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian VisitPointerToDataMemberBinaryOperator(E); 3518bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian else 3528bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian CGF.ErrorUnsupported(E, "aggregate binary expression"); 3538bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian} 3548bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian 3558bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanianvoid AggExprEmitter::VisitPointerToDataMemberBinaryOperator( 3568bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian const BinaryOperator *E) { 3578bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian LValue LV = CGF.EmitPointerToDataMemberBinaryExpr(E); 3588bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian EmitFinalDestCopy(E, LV); 359ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 360ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 36103d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattnervoid AggExprEmitter::VisitBinAssign(const BinaryOperator *E) { 362ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // For an assignment to work, the value on the right has 363ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // to be compatible with the value on the left. 3642dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(), 3652dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman E->getRHS()->getType()) 366ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman && "Invalid assignment"); 3679c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LHS = CGF.EmitLValue(E->getLHS()); 368883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 3697f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // We have to special case property setters, otherwise we must have 3707f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // a simple lvalue (no aggregates inside vectors, bitfields). 3717f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (LHS.isPropertyRef()) { 3727f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar llvm::Value *AggLoc = DestPtr; 3737f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (!AggLoc) 3747f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(E->getRHS()->getType())); 375240993d17d2b51c78d52df8743bdee4177960341Mike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 3761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), 377240993d17d2b51c78d52df8743bdee4177960341Mike Stump RValue::getAggregate(AggLoc, VolatileDest)); 378b3589f44c5d295cd41de2c83f3475116835eeebdMike Stump } else if (LHS.isKVCRef()) { 37943f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian llvm::Value *AggLoc = DestPtr; 38043f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian if (!AggLoc) 38143f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(E->getRHS()->getType())); 382a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 3831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CGF.EmitObjCPropertySet(LHS.getKVCRefExpr(), 384a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump RValue::getAggregate(AggLoc, VolatileDest)); 3857f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } else { 38608c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection = false; 387082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian if (CGF.getContext().getLangOptions().NeXTRuntime) { 388082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian QualType LHSTy = E->getLHS()->getType(); 3896217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek if (const RecordType *FDTTy = LHSTy.getTypePtr()->getAs<RecordType>()) 3901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump RequiresGCollection = FDTTy->getDecl()->hasObjectMember(); 391082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian } 3927f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // Codegen the RHS so that it stores directly into the LHS. 39308c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian CGF.EmitAggExpr(E->getRHS(), LHS.getAddress(), LHS.isVolatileQualified(), 39408c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian false, false, RequiresGCollection); 39549d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump EmitFinalDestCopy(E, LHS, true); 3967f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } 397883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 398883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 3999c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitConditionalOperator(const ConditionalOperator *E) { 4008e274bd14bcca8466542477844b88e90e90cde1aEli Friedman if (!E->getLHS()) { 4018e274bd14bcca8466542477844b88e90e90cde1aEli Friedman CGF.ErrorUnsupported(E, "conditional operator with missing LHS"); 4028e274bd14bcca8466542477844b88e90e90cde1aEli Friedman return; 4038e274bd14bcca8466542477844b88e90e90cde1aEli Friedman } 4048e274bd14bcca8466542477844b88e90e90cde1aEli Friedman 4059615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 4069615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 4079615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 4081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4098e274bd14bcca8466542477844b88e90e90cde1aEli Friedman CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock); 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 411a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.StartConditionalBranch(); 4129c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(LHSBlock); 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 414883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // Handle the GNU extension for missing LHS. 415883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(E->getLHS() && "Must have LHS for aggregate value"); 416883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 417c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getLHS()); 418a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.FinishConditionalBranch(); 419d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 4201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 421a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.StartConditionalBranch(); 4229c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(RHSBlock); 4231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 424c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getRHS()); 425a36bf8f74180e834c6bf2db867796fd5338495abAnders Carlsson CGF.FinishConditionalBranch(); 426d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 4271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4289c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(ContBlock); 429883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 430ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 431a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlssonvoid AggExprEmitter::VisitChooseExpr(const ChooseExpr *CE) { 432a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson Visit(CE->getChosenSubExpr(CGF.getContext())); 433a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson} 434a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson 435b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedmanvoid AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 4360785570af3ef5f8c5a0377129e41efe6f3f8d770Daniel Dunbar llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); 437ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 438ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 4390262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl if (!ArgPtr) { 440ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.ErrorUnsupported(VE, "aggregate va_arg expression"); 4410262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl return; 4420262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl } 4430262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl 4440953e767ff7817f97b3ab20896b229891eeff45bJohn McCall EmitFinalDestCopy(VE, LValue::MakeAddr(ArgPtr, Qualifiers())); 445b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman} 446b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman 447b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlssonvoid AggExprEmitter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { 448b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 4491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 450b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 451b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 452b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 453b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 454b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // FIXME: volatile 455b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitAggExpr(E->getSubExpr(), Val, false); 4561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 457b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Visit(E->getSubExpr()); 4581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 45914c5cbf59cffee52275230922283a247de407712Anders Carlsson // Don't make this a live temporary if we're emitting an initializer expr. 46014c5cbf59cffee52275230922283a247de407712Anders Carlsson if (!IsInitializer) 46114c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.PushCXXTemporary(E->getTemporary(), Val); 462b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson} 463b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 464b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlssonvoid 46531ccf377f4a676eb6c205b47eef435de616d5e2dAnders CarlssonAggExprEmitter::VisitCXXConstructExpr(const CXXConstructExpr *E) { 466b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 4671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 468b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 469b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 470b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 471b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson } 4728e587a15da6d3457a418239d5eb4146fcbd209f3Anders Carlsson 47316006c901315fa12a108b4e571f187f4b676e426Douglas Gregor if (E->requiresZeroInitialization()) 47416006c901315fa12a108b4e571f187f4b676e426Douglas Gregor EmitNullInitializationToLValue(LValue::MakeAddr(Val, 475dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // FIXME: Qualifiers()? 47616006c901315fa12a108b4e571f187f4b676e426Douglas Gregor E->getType().getQualifiers()), 47716006c901315fa12a108b4e571f187f4b676e426Douglas Gregor E->getType()); 47816006c901315fa12a108b4e571f187f4b676e426Douglas Gregor 479b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitCXXConstructExpr(Val, E); 4807f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson} 4817f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 4827f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlssonvoid AggExprEmitter::VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) { 483dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 484dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 485dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 486dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 487dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 488dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 489dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump CGF.EmitCXXExprWithTemporaries(E, Val, VolatileDest, IsInitializer); 490b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson} 491b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson 492329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopesvoid AggExprEmitter::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) { 493dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 494dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 495dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 496dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 497dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 498dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 499dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump LValue LV = LValue::MakeAddr(Val, Qualifiers()); 50030311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson EmitNullInitializationToLValue(LV, E->getType()); 50130311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson} 50230311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson 50330311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlssonvoid AggExprEmitter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) { 504dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 505dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 506dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 507dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 508dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 509dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 510dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump LValue LV = LValue::MakeAddr(Val, Qualifiers()); 51130311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson EmitNullInitializationToLValue(LV, E->getType()); 512329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes} 513329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes 514f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV) { 5157f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // FIXME: Ignore result? 516f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // FIXME: Are initializers affected by volatile? 5173498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor if (isa<ImplicitValueInitExpr>(E)) { 5184c67834407ca6ab344dcf44fc599ad4938cfa96dDouglas Gregor EmitNullInitializationToLValue(LV, E->getType()); 5193498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor } else if (E->getType()->isComplexType()) { 5203498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false); 521c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else if (CGF.hasAggregateLLVMType(E->getType())) { 522c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitAnyExpr(E, LV.getAddress(), false); 523c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else { 524c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitStoreThroughLValue(CGF.EmitAnyExpr(E), LV, E->getType()); 525f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 526f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 527305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 528f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitNullInitializationToLValue(LValue LV, QualType T) { 529f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (!CGF.hasAggregateLLVMType(T)) { 530f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // For non-aggregates, we can store zero 531c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson llvm::Value *Null = llvm::Constant::getNullValue(CGF.ConvertType(T)); 53282397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Null), LV, T); 533f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 534f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Otherwise, just memset the whole thing to zero. This is legal 535f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // because in LLVM, all default initializers are guaranteed to have a 536f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // bit pattern of all zeros. 5370f59312e7b625fa5821a63db65377d4b3b667e99Eli Friedman // FIXME: That isn't true for member pointers! 538f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // There's a potential optimization opportunity in combining 539f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // memsets; that would be easy for arrays, but relatively 540f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // difficult for structures with the current code. 541ccf0ed885952a52caa25767c787e0bf29f4688bdEli Friedman CGF.EmitMemSetToZero(LV.getAddress(), T); 542f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 543f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 544305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 545f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::VisitInitListExpr(InitListExpr *E) { 546a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#if 0 54713a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // FIXME: Assess perf here? Figure out what cases are worth optimizing here 54813a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // (Length of globals? Chunks of zeroed-out space?). 549a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // 550f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // If we can, prefer a copy from a global; this is a lot less code for long 551f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // globals, and it's easier for the current optimizers to analyze. 55213a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman if (llvm::Constant* C = CGF.CGM.EmitConstantExpr(E, E->getType(), &CGF)) { 553994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalVariable* GV = 55413a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman new llvm::GlobalVariable(CGF.CGM.getModule(), C->getType(), true, 55513a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman llvm::GlobalValue::InternalLinkage, C, ""); 55613a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman EmitFinalDestCopy(E, LValue::MakeAddr(GV, Qualifiers())); 557994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman return; 558994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman } 559a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#endif 560a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor if (E->hadArrayRangeDesignator()) { 561a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor CGF.ErrorUnsupported(E, "GNU array range designator extension"); 562a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor } 563a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor 564f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Handle initialization of an array. 565f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isArrayType()) { 566f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::PointerType *APType = 567f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::PointerType>(DestPtr->getType()); 568f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::ArrayType *AType = 569f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::ArrayType>(APType->getElementType()); 5701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 571f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumInitElements = E->getNumInits(); 572922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 5739619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (E->getNumInits() > 0) { 5749619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T1 = E->getType(); 5759619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T2 = E->getInit(0)->getType(); 5762dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman if (CGF.getContext().hasSameUnqualifiedType(T1, T2)) { 5779619662a1d42e2008b865d3459c0677e149dad1bChris Lattner EmitAggLoadOfLValue(E->getInit(0)); 5789619662a1d42e2008b865d3459c0677e149dad1bChris Lattner return; 5799619662a1d42e2008b865d3459c0677e149dad1bChris Lattner } 580922696f03ec9637449e2cba260493808b4977cd3Eli Friedman } 581922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 582f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumArrayElements = AType->getNumElements(); 583c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType ElementType = CGF.getContext().getCanonicalType(E->getType()); 5844c67834407ca6ab344dcf44fc599ad4938cfa96dDouglas Gregor ElementType = CGF.getContext().getAsArrayType(ElementType)->getElementType(); 5851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5860953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // FIXME: were we intentionally ignoring address spaces and GC attributes? 5870953e767ff7817f97b3ab20896b229891eeff45bJohn McCall Qualifiers Quals = CGF.MakeQualifiers(ElementType); 5881e692ace08959399794363e77499b73da5494af9Eli Friedman 589f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (uint64_t i = 0; i != NumArrayElements; ++i) { 590f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 591f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (i < NumInitElements) 5921e692ace08959399794363e77499b73da5494af9Eli Friedman EmitInitializationToLValue(E->getInit(i), 5930953e767ff7817f97b3ab20896b229891eeff45bJohn McCall LValue::MakeAddr(NextVal, Quals)); 594f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner else 5950953e767ff7817f97b3ab20896b229891eeff45bJohn McCall EmitNullInitializationToLValue(LValue::MakeAddr(NextVal, Quals), 596f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner ElementType); 597f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 598305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio return; 599f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 6001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 601f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner assert(E->getType()->isRecordType() && "Only support structs/unions here!"); 6021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 603f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Do struct initialization; this code just sets each individual member 604f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // to the approprate value. This makes bitfield support automatic; 605f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the disadvantage is that the generated code is more difficult for 606f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the optimizer, especially with bitfields. 607f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumInitElements = E->getNumInits(); 6086217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *SD = E->getType()->getAs<RecordType>()->getDecl(); 609f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned CurInitVal = 0; 6100bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6110bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (E->getType()->isUnionType()) { 6120bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Only initialize one field of a union. The field itself is 6130bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // specified by the initializer list. 6140bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (!E->getInitializedFieldInUnion()) { 6150bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Empty union; we have nothing to do. 6161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6170bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#ifndef NDEBUG 6180bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Make sure that it's really an empty and not a failure of 6190bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // semantic analysis. 62017945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 62117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 6220bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor Field != FieldEnd; ++Field) 6230bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor assert(Field->isUnnamedBitfield() && "Only unnamed bitfields allowed"); 6240bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#endif 6250bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 6260bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6270bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6280bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // FIXME: volatility 6290bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor FieldDecl *Field = E->getInitializedFieldInUnion(); 6300bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor LValue FieldLoc = CGF.EmitLValueForField(DestPtr, Field, true, 0); 6310bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6320bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (NumInitElements) { 6330bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Store the initializer into the field 6340bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor EmitInitializationToLValue(E->getInit(0), FieldLoc); 6350bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } else { 6360bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Default-initialize to null 6370bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 6380bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6390bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6400bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 6410bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 643f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Here we iterate over the fields; this makes it simpler to both 644f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // default-initialize fields and skip over unnamed fields. 64517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 64617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 64744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; ++Field) { 64844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // We're done once we hit the flexible array member 64944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (Field->getType()->isIncompleteArrayType()) 65044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor break; 65144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 65234e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor if (Field->isUnnamedBitfield()) 653f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner continue; 65434e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor 6551e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 6560bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor LValue FieldLoc = CGF.EmitLValueForField(DestPtr, *Field, false, 0); 65714674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian // We never generate write-barries for initialized fields. 65814674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian LValue::SetObjCNonGC(FieldLoc, true); 659f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurInitVal < NumInitElements) { 660f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Store the initializer into the field 661f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner EmitInitializationToLValue(E->getInit(CurInitVal++), FieldLoc); 662f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 663f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // We're out of initalizers; default-initialize to null 66444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 665f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 666145cd89f9233d375381aa13bd28b2d36f83e6181Lauro Ramos Venancio } 667636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel} 668636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 669ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 670ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Entry Points into this File 671ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 672ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 673e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// EmitAggExpr - Emit the computation of the specified expression of aggregate 674e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// type. The result is computed into DestPtr. Note that if DestPtr is null, 675e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// the value of the aggregate expression is not needed. If VolatileDest is 676e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// true, DestPtr cannot be 0. 677ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattnervoid CodeGenFunction::EmitAggExpr(const Expr *E, llvm::Value *DestPtr, 67814c5cbf59cffee52275230922283a247de407712Anders Carlsson bool VolatileDest, bool IgnoreResult, 6791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool IsInitializer, 68008c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection) { 681ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner assert(E && hasAggregateLLVMType(E->getType()) && 682ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner "Invalid aggregate expression to emit"); 683e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump assert ((DestPtr != 0 || VolatileDest == false) 684e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump && "volatile aggregate can't be 0"); 6851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 68608c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian AggExprEmitter(*this, DestPtr, VolatileDest, IgnoreResult, IsInitializer, 68708c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian RequiresGCollection) 68849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump .Visit(const_cast<Expr*>(E)); 689ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 6907482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 6917482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateClear(llvm::Value *DestPtr, QualType Ty) { 6927482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 6937482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 6947482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar EmitMemSetToZero(DestPtr, Ty); 6957482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 6967482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 6977482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr, 69827fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump llvm::Value *SrcPtr, QualType Ty, 69927fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump bool isVolatile) { 7007482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 7011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 70283c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // Aggregate assignment turns into llvm.memcpy. This is almost valid per 703ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // C99 6.5.16.1p3, which states "If the value being stored in an object is 704ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // read from another object that overlaps in anyway the storage of the first 705ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // object, then the overlap shall be exact and the two objects shall have 706ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // qualified or unqualified versions of a compatible type." 707ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // 70883c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // memcpy is not defined if the source and destination pointers are exactly 709ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // equal, but other compilers do this optimization, and almost every memcpy 710ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // implementation handles this case safely. If there is a libc that does not 711ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // safely handle this, we can add a target hook. 7123c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *BP = llvm::Type::getInt8PtrTy(VMContext); 7137482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (DestPtr->getType() != BP) 7147482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr = Builder.CreateBitCast(DestPtr, BP, "tmp"); 7157482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (SrcPtr->getType() != BP) 7167482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar SrcPtr = Builder.CreateBitCast(SrcPtr, BP, "tmp"); 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. 7220032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = 7230032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::IntegerType::get(VMContext, LLVMPointerWidth); 7241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 725fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // FIXME: If we have a volatile struct, the optimizer can remove what might 726fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // appear to be `extra' memory ops: 727fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 728fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // volatile struct { int i; } a, b; 729fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 730fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // int main() { 731fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 732fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 733fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // } 734fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 73549d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // we need to use a differnt call here. We use isVolatile to indicate when 73649d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // either the source or the destination is volatile. 737ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner Builder.CreateCall4(CGM.getMemCpyFn(), 7387482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr, SrcPtr, 7397482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // TypeInfo.first describes size in bits. 7404a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::ConstantInt::get(IntPtr, TypeInfo.first/8), 7411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 7427482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar TypeInfo.second/8)); 7437482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 744