CGExprAgg.cpp revision 72119a887c4af39c90f10b6bdc158389071f42ea
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 12178e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson void EmitInitializationToLValue(Expr *E, LValue Address, QualType T); 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(), 19178e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson LValue::MakeAddr(CastPtr, Qualifiers()), 19278e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson E->getType()); 1933016842613674ab80796567239c15d529aff1458Anders Carlsson break; 1947e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes } 1951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1964d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // FIXME: Remove the CK_Unknown check here. 1973016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_Unknown: 1983016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_NoOp: 1993016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_UserDefinedConversion: 2003016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_ConstructorConversion: 2013016842613674ab80796567239c15d529aff1458Anders Carlsson assert(CGF.getContext().hasSameUnqualifiedType(E->getSubExpr()->getType(), 2023016842613674ab80796567239c15d529aff1458Anders Carlsson E->getType()) && 2033016842613674ab80796567239c15d529aff1458Anders Carlsson "Implicit cast types must be compatible"); 2043016842613674ab80796567239c15d529aff1458Anders Carlsson Visit(E->getSubExpr()); 2053016842613674ab80796567239c15d529aff1458Anders Carlsson break; 206e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 207e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson case CastExpr::CK_NullToMemberPointer: { 208e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson const llvm::Type *PtrDiffTy = 209e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 210e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 211e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *NullValue = llvm::Constant::getNullValue(PtrDiffTy); 212e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *Ptr = Builder.CreateStructGEP(DestPtr, 0, "ptr"); 213e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson Builder.CreateStore(NullValue, Ptr, VolatileDest); 214e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 215e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *Adj = Builder.CreateStructGEP(DestPtr, 1, "adj"); 216e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson Builder.CreateStore(NullValue, Adj, VolatileDest); 217e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 218e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson break; 219e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson } 22084080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 221bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson case CastExpr::CK_BitCast: { 222bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson // This must be a member function pointer cast. 223bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson Visit(E->getSubExpr()); 224bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson break; 225bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson } 226bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson 227c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman case CastExpr::CK_DerivedToBaseMemberPointer: 22884080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson case CastExpr::CK_BaseToDerivedMemberPointer: { 22984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson QualType SrcType = E->getSubExpr()->getType(); 23084080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 23184080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *Src = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(SrcType), 23284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson "tmp"); 23384080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson CGF.EmitAggExpr(E->getSubExpr(), Src, SrcType.isVolatileQualified()); 23484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 23584080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *SrcPtr = Builder.CreateStructGEP(Src, 0, "src.ptr"); 23684080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson SrcPtr = Builder.CreateLoad(SrcPtr); 23784080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 23884080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *SrcAdj = Builder.CreateStructGEP(Src, 1, "src.adj"); 23984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson SrcAdj = Builder.CreateLoad(SrcAdj); 24084080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 24184080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *DstPtr = Builder.CreateStructGEP(DestPtr, 0, "dst.ptr"); 24284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson Builder.CreateStore(SrcPtr, DstPtr, VolatileDest); 24384080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 24484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *DstAdj = Builder.CreateStructGEP(DestPtr, 1, "dst.adj"); 24584080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 24684080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson // Now See if we need to update the adjustment. 247c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman const CXXRecordDecl *BaseDecl = 24884080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson cast<CXXRecordDecl>(SrcType->getAs<MemberPointerType>()-> 24984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson getClass()->getAs<RecordType>()->getDecl()); 250c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman const CXXRecordDecl *DerivedDecl = 25184080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson cast<CXXRecordDecl>(E->getType()->getAs<MemberPointerType>()-> 25284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson getClass()->getAs<RecordType>()->getDecl()); 253c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman if (E->getCastKind() == CastExpr::CK_DerivedToBaseMemberPointer) 254c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman std::swap(DerivedDecl, BaseDecl); 255c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman 256bb7e17b52ffaa4097b4c4d7935746d23539ffe2aAnders Carlsson if (llvm::Constant *Adj = 257bb7e17b52ffaa4097b4c4d7935746d23539ffe2aAnders Carlsson CGF.CGM.GetNonVirtualBaseClassOffset(DerivedDecl, BaseDecl)) { 258c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman if (E->getCastKind() == CastExpr::CK_DerivedToBaseMemberPointer) 259c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman SrcAdj = Builder.CreateSub(SrcAdj, Adj, "adj"); 260c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman else 261c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman SrcAdj = Builder.CreateAdd(SrcAdj, Adj, "adj"); 262c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman } 26384080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 26484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson Builder.CreateStore(SrcAdj, DstAdj, VolatileDest); 26584080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson break; 26684080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson } 2673016842613674ab80796567239c15d529aff1458Anders Carlsson } 268e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson} 269e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson 2709619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitCallExpr(const CallExpr *E) { 271e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson if (E->getCallReturnType()->isReferenceType()) { 272e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson EmitAggLoadOfLValue(E); 273e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson return; 274e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson } 2751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 276d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson // If the struct doesn't require GC, we can just pass the destination 277d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson // directly to EmitCall. 278d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson if (!RequiresGCollection) { 279d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson CGF.EmitCallExpr(E, ReturnValueSlot(DestPtr, VolatileDest)); 280d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson return; 281d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson } 282d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson 283148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson RValue RV = CGF.EmitCallExpr(E); 2844ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 285796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman} 2869619662a1d42e2008b865d3459c0677e149dad1bChris Lattner 2879619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) { 2888f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar RValue RV = CGF.EmitObjCMessageExpr(E); 2894ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 2908fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 291796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 2929c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbarvoid AggExprEmitter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 2939c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar RValue RV = CGF.EmitObjCPropertyGet(E); 2944ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 2955daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian} 2965daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 29709105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanianvoid AggExprEmitter::VisitObjCImplicitSetterGetterRefExpr( 29809105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian ObjCImplicitSetterGetterRefExpr *E) { 2995daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian RValue RV = CGF.EmitObjCPropertyGet(E); 3004ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 301148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson} 302148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 3039619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitBinComma(const BinaryOperator *E) { 3047f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitAnyExpr(E->getLHS(), 0, false, true); 30514c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.EmitAggExpr(E->getRHS(), DestPtr, VolatileDest, 30614c5cbf59cffee52275230922283a247de407712Anders Carlsson /*IgnoreResult=*/false, IsInitializer); 30707fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman} 30807fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman 309a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlssonvoid AggExprEmitter::VisitUnaryAddrOf(const UnaryOperator *E) { 310a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson // We have a member function pointer. 311a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson const MemberPointerType *MPT = E->getType()->getAs<MemberPointerType>(); 312babac13bb332974c8bb800b1a9714bcdf5afefccDaniel Dunbar (void) MPT; 313a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson assert(MPT->getPointeeType()->isFunctionProtoType() && 314a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson "Unexpected member pointer type!"); 315a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 316a2813cec2605ce7878d1b13471d685f689b251afDouglas Gregor const DeclRefExpr *DRE = cast<DeclRefExpr>(E->getSubExpr()); 3177af4ec744e30d573482aef7a37089d0d32cc07efAnders Carlsson const CXXMethodDecl *MD = 3187af4ec744e30d573482aef7a37089d0d32cc07efAnders Carlsson cast<CXXMethodDecl>(DRE->getDecl())->getCanonicalDecl(); 319a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 320a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson const llvm::Type *PtrDiffTy = 321a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 322a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 323a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *DstPtr = Builder.CreateStructGEP(DestPtr, 0, "dst.ptr"); 324a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *FuncPtr; 325a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 326a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson if (MD->isVirtual()) { 327dbd920c7758e6dfb678a8f503fb14ba97c26f23aAnders Carlsson int64_t Index = 328dbd920c7758e6dfb678a8f503fb14ba97c26f23aAnders Carlsson CGF.CGM.getVtableInfo().getMethodVtableIndex(MD); 329a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 330e8a81f7e8e26275d91c073bf908a7d6d246106c5Anders Carlsson // Itanium C++ ABI 2.3: 331e8a81f7e8e26275d91c073bf908a7d6d246106c5Anders Carlsson // For a non-virtual function, this field is a simple function pointer. 332e8a81f7e8e26275d91c073bf908a7d6d246106c5Anders Carlsson // For a virtual function, it is 1 plus the virtual table offset 333e8a81f7e8e26275d91c073bf908a7d6d246106c5Anders Carlsson // (in bytes) of the function, represented as a ptrdiff_t. 334e8a81f7e8e26275d91c073bf908a7d6d246106c5Anders Carlsson FuncPtr = llvm::ConstantInt::get(PtrDiffTy, (Index * 8) + 1); 335a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson } else { 336a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson FuncPtr = llvm::ConstantExpr::getPtrToInt(CGF.CGM.GetAddrOfFunction(MD), 337a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson PtrDiffTy); 338a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson } 339a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson Builder.CreateStore(FuncPtr, DstPtr, VolatileDest); 340a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 341a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *AdjPtr = Builder.CreateStructGEP(DestPtr, 1, "dst.adj"); 342a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 343a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson // The adjustment will always be 0. 344a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson Builder.CreateStore(llvm::ConstantInt::get(PtrDiffTy, 0), AdjPtr, 345a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson VolatileDest); 346a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson} 347a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 348b2d963f527674275c9109252474948368b6e6161Chris Lattnervoid AggExprEmitter::VisitStmtExpr(const StmtExpr *E) { 349b2d963f527674275c9109252474948368b6e6161Chris Lattner CGF.EmitCompoundStmt(*E->getSubStmt(), true, DestPtr, VolatileDest); 350b2d963f527674275c9109252474948368b6e6161Chris Lattner} 351b2d963f527674275c9109252474948368b6e6161Chris Lattner 3529c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitBinaryOperator(const BinaryOperator *E) { 35352f08bcbb81c750ed62b53ed0b34aff16143b877Fariborz Jahanian if (E->getOpcode() == BinaryOperator::PtrMemD || 35452f08bcbb81c750ed62b53ed0b34aff16143b877Fariborz Jahanian E->getOpcode() == BinaryOperator::PtrMemI) 3558bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian VisitPointerToDataMemberBinaryOperator(E); 3568bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian else 3578bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian CGF.ErrorUnsupported(E, "aggregate binary expression"); 3588bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian} 3598bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian 3608bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanianvoid AggExprEmitter::VisitPointerToDataMemberBinaryOperator( 3618bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian const BinaryOperator *E) { 3628bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian LValue LV = CGF.EmitPointerToDataMemberBinaryExpr(E); 3638bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian EmitFinalDestCopy(E, LV); 364ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 365ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 36603d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattnervoid AggExprEmitter::VisitBinAssign(const BinaryOperator *E) { 367ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // For an assignment to work, the value on the right has 368ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // to be compatible with the value on the left. 3692dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(), 3702dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman E->getRHS()->getType()) 371ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman && "Invalid assignment"); 3729c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LHS = CGF.EmitLValue(E->getLHS()); 373883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 3747f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // We have to special case property setters, otherwise we must have 3757f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // a simple lvalue (no aggregates inside vectors, bitfields). 3767f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (LHS.isPropertyRef()) { 3777f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar llvm::Value *AggLoc = DestPtr; 3787f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (!AggLoc) 3797f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(E->getRHS()->getType())); 380240993d17d2b51c78d52df8743bdee4177960341Mike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 3811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), 382240993d17d2b51c78d52df8743bdee4177960341Mike Stump RValue::getAggregate(AggLoc, VolatileDest)); 383b3589f44c5d295cd41de2c83f3475116835eeebdMike Stump } else if (LHS.isKVCRef()) { 38443f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian llvm::Value *AggLoc = DestPtr; 38543f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian if (!AggLoc) 38643f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(E->getRHS()->getType())); 387a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 3881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CGF.EmitObjCPropertySet(LHS.getKVCRefExpr(), 389a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump RValue::getAggregate(AggLoc, VolatileDest)); 3907f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } else { 39108c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection = false; 392082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian if (CGF.getContext().getLangOptions().NeXTRuntime) { 393082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian QualType LHSTy = E->getLHS()->getType(); 3946217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek if (const RecordType *FDTTy = LHSTy.getTypePtr()->getAs<RecordType>()) 3951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump RequiresGCollection = FDTTy->getDecl()->hasObjectMember(); 396082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian } 3977f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // Codegen the RHS so that it stores directly into the LHS. 39808c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian CGF.EmitAggExpr(E->getRHS(), LHS.getAddress(), LHS.isVolatileQualified(), 39908c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian false, false, RequiresGCollection); 40049d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump EmitFinalDestCopy(E, LHS, true); 4017f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } 402883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 403883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 4049c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitConditionalOperator(const ConditionalOperator *E) { 4058e274bd14bcca8466542477844b88e90e90cde1aEli Friedman if (!E->getLHS()) { 4068e274bd14bcca8466542477844b88e90e90cde1aEli Friedman CGF.ErrorUnsupported(E, "conditional operator with missing LHS"); 4078e274bd14bcca8466542477844b88e90e90cde1aEli Friedman return; 4088e274bd14bcca8466542477844b88e90e90cde1aEli Friedman } 4098e274bd14bcca8466542477844b88e90e90cde1aEli Friedman 4109615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 4119615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 4129615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4148e274bd14bcca8466542477844b88e90e90cde1aEli Friedman CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock); 4151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 41672119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.BeginConditionalBranch(); 4179c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(LHSBlock); 4181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 419883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // Handle the GNU extension for missing LHS. 420883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(E->getLHS() && "Must have LHS for aggregate value"); 421883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 422c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getLHS()); 42372119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.EndConditionalBranch(); 424d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 4251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 42672119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.BeginConditionalBranch(); 4279c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(RHSBlock); 4281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 429c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getRHS()); 43072119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.EndConditionalBranch(); 431d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 4321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4339c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(ContBlock); 434883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 435ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 436a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlssonvoid AggExprEmitter::VisitChooseExpr(const ChooseExpr *CE) { 437a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson Visit(CE->getChosenSubExpr(CGF.getContext())); 438a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson} 439a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson 440b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedmanvoid AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 4410785570af3ef5f8c5a0377129e41efe6f3f8d770Daniel Dunbar llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); 442ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 443ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 4440262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl if (!ArgPtr) { 445ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.ErrorUnsupported(VE, "aggregate va_arg expression"); 4460262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl return; 4470262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl } 4480262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl 4490953e767ff7817f97b3ab20896b229891eeff45bJohn McCall EmitFinalDestCopy(VE, LValue::MakeAddr(ArgPtr, Qualifiers())); 450b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman} 451b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman 452b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlssonvoid AggExprEmitter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { 453b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 4541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 455b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 456b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 457b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 458b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 459b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // FIXME: volatile 460b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitAggExpr(E->getSubExpr(), Val, false); 4611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 462b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Visit(E->getSubExpr()); 4631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 46414c5cbf59cffee52275230922283a247de407712Anders Carlsson // Don't make this a live temporary if we're emitting an initializer expr. 46514c5cbf59cffee52275230922283a247de407712Anders Carlsson if (!IsInitializer) 46614c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.PushCXXTemporary(E->getTemporary(), Val); 467b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson} 468b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 469b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlssonvoid 47031ccf377f4a676eb6c205b47eef435de616d5e2dAnders CarlssonAggExprEmitter::VisitCXXConstructExpr(const CXXConstructExpr *E) { 471b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 4721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 473b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 474b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 475b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 476b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson } 4778e587a15da6d3457a418239d5eb4146fcbd209f3Anders Carlsson 47816006c901315fa12a108b4e571f187f4b676e426Douglas Gregor if (E->requiresZeroInitialization()) 47916006c901315fa12a108b4e571f187f4b676e426Douglas Gregor EmitNullInitializationToLValue(LValue::MakeAddr(Val, 480dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // FIXME: Qualifiers()? 48116006c901315fa12a108b4e571f187f4b676e426Douglas Gregor E->getType().getQualifiers()), 48216006c901315fa12a108b4e571f187f4b676e426Douglas Gregor E->getType()); 48316006c901315fa12a108b4e571f187f4b676e426Douglas Gregor 484b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitCXXConstructExpr(Val, E); 4857f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson} 4867f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 4877f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlssonvoid AggExprEmitter::VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) { 488dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 489dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 490dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 491dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 492dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 493dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 494dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump CGF.EmitCXXExprWithTemporaries(E, Val, VolatileDest, IsInitializer); 495b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson} 496b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson 497329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopesvoid AggExprEmitter::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) { 498dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 499dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 500dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 501dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 502dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 503dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 504dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump LValue LV = LValue::MakeAddr(Val, Qualifiers()); 50530311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson EmitNullInitializationToLValue(LV, E->getType()); 50630311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson} 50730311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson 50830311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlssonvoid AggExprEmitter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) { 509dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 510dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 511dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 512dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 513dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 514dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 515dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump LValue LV = LValue::MakeAddr(Val, Qualifiers()); 51630311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson EmitNullInitializationToLValue(LV, E->getType()); 517329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes} 518329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes 51978e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlssonvoid 52078e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders CarlssonAggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV, QualType T) { 5217f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // FIXME: Ignore result? 522f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // FIXME: Are initializers affected by volatile? 5233498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor if (isa<ImplicitValueInitExpr>(E)) { 52478e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson EmitNullInitializationToLValue(LV, T); 525e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson } else if (T->isReferenceType()) { 526e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson RValue RV = CGF.EmitReferenceBindingToExpr(E, /*IsInitializer=*/false); 527e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson CGF.EmitStoreThroughLValue(RV, LV, T); 52878e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson } else if (T->isAnyComplexType()) { 5293498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false); 53078e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson } else if (CGF.hasAggregateLLVMType(T)) { 531c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitAnyExpr(E, LV.getAddress(), false); 532c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else { 53378e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson CGF.EmitStoreThroughLValue(CGF.EmitAnyExpr(E), LV, T); 534f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 535f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 536305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 537f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitNullInitializationToLValue(LValue LV, QualType T) { 538f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (!CGF.hasAggregateLLVMType(T)) { 539f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // For non-aggregates, we can store zero 540c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson llvm::Value *Null = llvm::Constant::getNullValue(CGF.ConvertType(T)); 54182397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Null), LV, T); 542f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 543f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Otherwise, just memset the whole thing to zero. This is legal 544f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // because in LLVM, all default initializers are guaranteed to have a 545f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // bit pattern of all zeros. 5460f59312e7b625fa5821a63db65377d4b3b667e99Eli Friedman // FIXME: That isn't true for member pointers! 547f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // There's a potential optimization opportunity in combining 548f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // memsets; that would be easy for arrays, but relatively 549f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // difficult for structures with the current code. 550ccf0ed885952a52caa25767c787e0bf29f4688bdEli Friedman CGF.EmitMemSetToZero(LV.getAddress(), T); 551f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 552f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 553305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 554f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::VisitInitListExpr(InitListExpr *E) { 555a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#if 0 55613a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // FIXME: Assess perf here? Figure out what cases are worth optimizing here 55713a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // (Length of globals? Chunks of zeroed-out space?). 558a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // 559f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // If we can, prefer a copy from a global; this is a lot less code for long 560f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // globals, and it's easier for the current optimizers to analyze. 56113a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman if (llvm::Constant* C = CGF.CGM.EmitConstantExpr(E, E->getType(), &CGF)) { 562994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalVariable* GV = 56313a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman new llvm::GlobalVariable(CGF.CGM.getModule(), C->getType(), true, 56413a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman llvm::GlobalValue::InternalLinkage, C, ""); 56513a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman EmitFinalDestCopy(E, LValue::MakeAddr(GV, Qualifiers())); 566994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman return; 567994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman } 568a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#endif 569a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor if (E->hadArrayRangeDesignator()) { 570a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor CGF.ErrorUnsupported(E, "GNU array range designator extension"); 571a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor } 572a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor 573f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Handle initialization of an array. 574f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isArrayType()) { 575f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::PointerType *APType = 576f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::PointerType>(DestPtr->getType()); 577f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::ArrayType *AType = 578f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::ArrayType>(APType->getElementType()); 5791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 580f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumInitElements = E->getNumInits(); 581922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 5829619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (E->getNumInits() > 0) { 5839619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T1 = E->getType(); 5849619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T2 = E->getInit(0)->getType(); 5852dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman if (CGF.getContext().hasSameUnqualifiedType(T1, T2)) { 5869619662a1d42e2008b865d3459c0677e149dad1bChris Lattner EmitAggLoadOfLValue(E->getInit(0)); 5879619662a1d42e2008b865d3459c0677e149dad1bChris Lattner return; 5889619662a1d42e2008b865d3459c0677e149dad1bChris Lattner } 589922696f03ec9637449e2cba260493808b4977cd3Eli Friedman } 590922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 591f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumArrayElements = AType->getNumElements(); 592c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType ElementType = CGF.getContext().getCanonicalType(E->getType()); 5934c67834407ca6ab344dcf44fc599ad4938cfa96dDouglas Gregor ElementType = CGF.getContext().getAsArrayType(ElementType)->getElementType(); 5941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5950953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // FIXME: were we intentionally ignoring address spaces and GC attributes? 5960953e767ff7817f97b3ab20896b229891eeff45bJohn McCall Qualifiers Quals = CGF.MakeQualifiers(ElementType); 5971e692ace08959399794363e77499b73da5494af9Eli Friedman 598f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (uint64_t i = 0; i != NumArrayElements; ++i) { 599f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 600f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (i < NumInitElements) 6011e692ace08959399794363e77499b73da5494af9Eli Friedman EmitInitializationToLValue(E->getInit(i), 60278e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson LValue::MakeAddr(NextVal, Quals), 60378e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson ElementType); 604f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner else 6050953e767ff7817f97b3ab20896b229891eeff45bJohn McCall EmitNullInitializationToLValue(LValue::MakeAddr(NextVal, Quals), 606f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner ElementType); 607f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 608305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio return; 609f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 6101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 611f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner assert(E->getType()->isRecordType() && "Only support structs/unions here!"); 6121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 613f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Do struct initialization; this code just sets each individual member 614f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // to the approprate value. This makes bitfield support automatic; 615f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the disadvantage is that the generated code is more difficult for 616f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the optimizer, especially with bitfields. 617f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumInitElements = E->getNumInits(); 6186217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *SD = E->getType()->getAs<RecordType>()->getDecl(); 619f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned CurInitVal = 0; 6200bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6210bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (E->getType()->isUnionType()) { 6220bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Only initialize one field of a union. The field itself is 6230bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // specified by the initializer list. 6240bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (!E->getInitializedFieldInUnion()) { 6250bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Empty union; we have nothing to do. 6261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6270bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#ifndef NDEBUG 6280bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Make sure that it's really an empty and not a failure of 6290bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // semantic analysis. 63017945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 63117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 6320bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor Field != FieldEnd; ++Field) 6330bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor assert(Field->isUnnamedBitfield() && "Only unnamed bitfields allowed"); 6340bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#endif 6350bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 6360bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6370bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6380bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // FIXME: volatility 6390bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor FieldDecl *Field = E->getInitializedFieldInUnion(); 640e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson LValue FieldLoc = CGF.EmitLValueForFieldInitialization(DestPtr, Field, 0); 6410bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6420bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (NumInitElements) { 6430bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Store the initializer into the field 64478e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson EmitInitializationToLValue(E->getInit(0), FieldLoc, Field->getType()); 6450bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } else { 6460bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Default-initialize to null 6470bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 6480bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6490bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6500bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 6510bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 653f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Here we iterate over the fields; this makes it simpler to both 654f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // default-initialize fields and skip over unnamed fields. 65517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 65617945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 65744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; ++Field) { 65844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // We're done once we hit the flexible array member 65944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (Field->getType()->isIncompleteArrayType()) 66044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor break; 66144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 66234e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor if (Field->isUnnamedBitfield()) 663f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner continue; 66434e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor 6651e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 666e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson LValue FieldLoc = CGF.EmitLValueForFieldInitialization(DestPtr, *Field, 0); 66714674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian // We never generate write-barries for initialized fields. 66814674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian LValue::SetObjCNonGC(FieldLoc, true); 669f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurInitVal < NumInitElements) { 670f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Store the initializer into the field 67178e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson EmitInitializationToLValue(E->getInit(CurInitVal++), FieldLoc, 67278e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson Field->getType()); 673f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 674f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // We're out of initalizers; default-initialize to null 67544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 676f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 677145cd89f9233d375381aa13bd28b2d36f83e6181Lauro Ramos Venancio } 678636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel} 679636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 680ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 681ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Entry Points into this File 682ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 683ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 684e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// EmitAggExpr - Emit the computation of the specified expression of aggregate 685e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// type. The result is computed into DestPtr. Note that if DestPtr is null, 686e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// the value of the aggregate expression is not needed. If VolatileDest is 687e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// true, DestPtr cannot be 0. 688ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattnervoid CodeGenFunction::EmitAggExpr(const Expr *E, llvm::Value *DestPtr, 68914c5cbf59cffee52275230922283a247de407712Anders Carlsson bool VolatileDest, bool IgnoreResult, 6901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool IsInitializer, 69108c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection) { 692ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner assert(E && hasAggregateLLVMType(E->getType()) && 693ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner "Invalid aggregate expression to emit"); 694e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump assert ((DestPtr != 0 || VolatileDest == false) 695e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump && "volatile aggregate can't be 0"); 6961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 69708c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian AggExprEmitter(*this, DestPtr, VolatileDest, IgnoreResult, IsInitializer, 69808c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian RequiresGCollection) 69949d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump .Visit(const_cast<Expr*>(E)); 700ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 7017482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 7027482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateClear(llvm::Value *DestPtr, QualType Ty) { 7037482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 7047482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 7057482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar EmitMemSetToZero(DestPtr, Ty); 7067482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 7077482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 7087482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr, 70927fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump llvm::Value *SrcPtr, QualType Ty, 71027fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump bool isVolatile) { 7117482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 7121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 71383c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // Aggregate assignment turns into llvm.memcpy. This is almost valid per 714ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // C99 6.5.16.1p3, which states "If the value being stored in an object is 715ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // read from another object that overlaps in anyway the storage of the first 716ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // object, then the overlap shall be exact and the two objects shall have 717ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // qualified or unqualified versions of a compatible type." 718ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // 71983c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // memcpy is not defined if the source and destination pointers are exactly 720ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // equal, but other compilers do this optimization, and almost every memcpy 721ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // implementation handles this case safely. If there is a libc that does not 722ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // safely handle this, we can add a target hook. 7233c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *BP = llvm::Type::getInt8PtrTy(VMContext); 7247482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (DestPtr->getType() != BP) 7257482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr = Builder.CreateBitCast(DestPtr, BP, "tmp"); 7267482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (SrcPtr->getType() != BP) 7277482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar SrcPtr = Builder.CreateBitCast(SrcPtr, BP, "tmp"); 7281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7297482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Get size and alignment info for this aggregate. 7307482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar std::pair<uint64_t, unsigned> TypeInfo = getContext().getTypeInfo(Ty); 7311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7327482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // FIXME: Handle variable sized types. 7330032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = 7340032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::IntegerType::get(VMContext, LLVMPointerWidth); 7351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 736fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // FIXME: If we have a volatile struct, the optimizer can remove what might 737fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // appear to be `extra' memory ops: 738fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 739fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // volatile struct { int i; } a, b; 740fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 741fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // int main() { 742fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 743fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 744fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // } 745fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 74649d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // we need to use a differnt call here. We use isVolatile to indicate when 74749d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // either the source or the destination is volatile. 748ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner Builder.CreateCall4(CGM.getMemCpyFn(), 7497482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr, SrcPtr, 7507482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // TypeInfo.first describes size in bits. 7514a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::ConstantInt::get(IntPtr, TypeInfo.first/8), 7521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 7537482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar TypeInfo.second/8)); 7547482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 755