CGExprAgg.cpp revision 14c5cbf59cffee52275230922283a247de407712
1566b6ce741c742cc3f8cb85e2376ec4a3490ff5fChris Lattner//===--- CGExprAgg.cpp - Emit LLVM Code from Aggregate Expressions --------===// 2af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 3af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// The LLVM Compiler Infrastructure 4af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 7af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 8af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner//===----------------------------------------------------------------------===// 9af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 10af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// This contains code to emit Aggregate Expr nodes as LLVM code. 11af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner// 12af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner//===----------------------------------------------------------------------===// 13af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner 14af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattner#include "CodeGenFunction.h" 15883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner#include "CodeGenModule.h" 16082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian#include "CGObjCRuntime.h" 17de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/ASTContext.h" 18b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson#include "clang/AST/DeclCXX.h" 19de7fb8413b13651fd85b7125d08b3c9ac2816d9dDaniel Dunbar#include "clang/AST/StmtVisitor.h" 20883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner#include "llvm/Constants.h" 21883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner#include "llvm/Function.h" 22636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel#include "llvm/GlobalVariable.h" 239c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner#include "llvm/Support/Compiler.h" 24f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner#include "llvm/Intrinsics.h" 25af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattnerusing namespace clang; 26af6f528b2bd6c3ee517e02d346238addb74159ccChris Lattnerusing namespace CodeGen; 27883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 289c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner//===----------------------------------------------------------------------===// 299c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner// Aggregate Expression Emitter 309c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner//===----------------------------------------------------------------------===// 319c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 329c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnernamespace { 339c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnerclass VISIBILITY_HIDDEN AggExprEmitter : public StmtVisitor<AggExprEmitter> { 349c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CodeGenFunction &CGF; 3545d196b8387dcefc4df26cda114fa34c6528e928Daniel Dunbar CGBuilderTy &Builder; 369c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner llvm::Value *DestPtr; 379c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner bool VolatileDest; 3849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump bool IgnoreResult; 3914c5cbf59cffee52275230922283a247de407712Anders Carlsson bool IsInitializer; 409c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnerpublic: 41ff4bf3bd6174f6a02da4ee2efc6064c005295d44Mike Stump AggExprEmitter(CodeGenFunction &cgf, llvm::Value *destPtr, bool v, 4214c5cbf59cffee52275230922283a247de407712Anders Carlsson bool ignore, bool isinit) 43bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner : CGF(cgf), Builder(CGF.Builder), 4414c5cbf59cffee52275230922283a247de407712Anders Carlsson DestPtr(destPtr), VolatileDest(v), IgnoreResult(ignore), 4514c5cbf59cffee52275230922283a247de407712Anders Carlsson IsInitializer(isinit) { 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 //===--------------------------------------------------------------------===// 64ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 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); } 75ad6ebd6efcc30cc54540ed9d92256b410519ec0fSeo Sanghyeon void VisitStringLiteral(StringLiteral *E) { EmitAggLoadOfLValue(E); } 76f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 77f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner EmitAggLoadOfLValue(E); 78f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 799b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon void VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 809b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon EmitAggLoadOfLValue(E); 819b73b39f6fbf987acbbe6570d557d13f07c7e0f7Seo Sanghyeon } 82f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitBlockDeclRefExpr(const BlockDeclRefExpr *E) { 83f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner EmitAggLoadOfLValue(E); 84f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 85f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner void VisitPredefinedExpr(const PredefinedExpr *E) { 86f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner EmitAggLoadOfLValue(E); 87f0a990c2aa0b596a7e3cdd8fa2a5909d591ffe66Chris Lattner } 884c67834407ca6ab344dcf44fc599ad4938cfa96dDouglas Gregor 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); 9403d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattner void VisitBinAssign(const BinaryOperator *E); 9507fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman void VisitBinComma(const BinaryOperator *E); 969c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 978fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner void VisitObjCMessageExpr(ObjCMessageExpr *E); 980a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar void VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { 990a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar EmitAggLoadOfLValue(E); 1000a04d77bde7e3a661c2b41b60630d125d09ed6efDaniel Dunbar } 1019c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar void VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E); 1025daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian void VisitObjCKVCRefExpr(ObjCKVCRefExpr *E); 1039c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 1049c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner void VisitConditionalOperator(const ConditionalOperator *CO); 105a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson void VisitChooseExpr(const ChooseExpr *CE); 106636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel void VisitInitListExpr(InitListExpr *E); 10704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { 10804421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Visit(DAE->getExpr()); 10904421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner } 110b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E); 11131ccf377f4a676eb6c205b47eef435de616d5e2dAnders Carlsson void VisitCXXConstructExpr(const CXXConstructExpr *E); 1127f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson void VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E); 1137f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 114b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman void VisitVAArgExpr(VAArgExpr *E); 115f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 116f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitInitializationToLValue(Expr *E, LValue Address); 117f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner void EmitNullInitializationToLValue(LValue Address, QualType T); 1189c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner // case Expr::ChooseExprClass: 119305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 1209c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner}; 1219c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner} // end anonymous namespace. 1229c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 123ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 124ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Utilities 125ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 1269c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner 127883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// EmitAggLoadOfLValue - Given an expression with aggregate type that 128883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// represents a value lvalue, this method emits the address of the lvalue, 129883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner/// then loads the result into DestPtr. 1309c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::EmitAggLoadOfLValue(const Expr *E) { 1319c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LV = CGF.EmitLValue(E); 1324ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, LV); 1334ac20ddc7ab324a59862657f756bdd060076b137Mike Stump} 1344ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 1354ac20ddc7ab324a59862657f756bdd060076b137Mike Stump/// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 13649d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stumpvoid AggExprEmitter::EmitFinalDestCopy(const Expr *E, RValue Src, bool Ignore) { 1374ac20ddc7ab324a59862657f756bdd060076b137Mike Stump assert(Src.isAggregate() && "value must be aggregate value!"); 1384ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 139883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // If the result is ignored, don't copy from the value. 1409ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump if (DestPtr == 0) { 14149d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump if (!Src.isVolatileQualified() || (IgnoreResult && Ignore)) 1429ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump return; 14349d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // If the source is volatile, we must read from it; to do that, we need 14449d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // some place to put it. 14549d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump DestPtr = CGF.CreateTempAlloca(CGF.ConvertType(E->getType()), "agg.tmp"); 1469ccb103c6f777fc42343b23b19a8c2c9a740e6e8Mike Stump } 147883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 1484ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // If the result of the assignment is used, copy the LHS there also. 1494ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // FIXME: Pass VolatileDest as well. I think we also need to merge volatile 1504ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // from the source as well, as we can't eliminate it if either operand 1514ac20ddc7ab324a59862657f756bdd060076b137Mike Stump // is volatile, unless copy has volatile for both source and destination.. 15227fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump CGF.EmitAggregateCopy(DestPtr, Src.getAggregateAddr(), E->getType(), 15327fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump VolatileDest|Src.isVolatileQualified()); 1544ac20ddc7ab324a59862657f756bdd060076b137Mike Stump} 1554ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 1564ac20ddc7ab324a59862657f756bdd060076b137Mike Stump/// EmitFinalDestCopy - Perform the final copy to DestPtr, if desired. 15749d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stumpvoid AggExprEmitter::EmitFinalDestCopy(const Expr *E, LValue Src, bool Ignore) { 1584ac20ddc7ab324a59862657f756bdd060076b137Mike Stump assert(Src.isSimple() && "Can't have aggregate bitfield, vector, etc"); 1594ac20ddc7ab324a59862657f756bdd060076b137Mike Stump 1604ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RValue::getAggregate(Src.getAddress(), 16149d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump Src.isVolatileQualified()), 16249d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump Ignore); 163883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 164883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 165ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 166ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Visitor Methods 167ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 168ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 1694d8673b645ad86e496b886a0f80b60763f67071dAnders Carlssonvoid AggExprEmitter::VisitCastExpr(CastExpr *E) { 1704d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson if (E->getCastKind() == CastExpr::CK_ToUnion) { 1714d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // GCC union extension 17234ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman QualType PtrTy = 17334ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman CGF.getContext().getPointerType(E->getSubExpr()->getType()); 17434ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman llvm::Value *CastPtr = Builder.CreateBitCast(DestPtr, 17534ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman CGF.ConvertType(PtrTy)); 176c6a38a47bf3908ab2183d7946498138d8b07c886Mon P Wang EmitInitializationToLValue(E->getSubExpr(), 177c6a38a47bf3908ab2183d7946498138d8b07c886Mon P Wang LValue::MakeAddr(CastPtr, 0)); 1787e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes return; 1797e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes } 1807e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes 1814d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // FIXME: Remove the CK_Unknown check here. 1824d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson assert((E->getCastKind() == CastExpr::CK_NoOp || 1834d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson E->getCastKind() == CastExpr::CK_Unknown) && 1844d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson "Only no-op casts allowed!"); 1852dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman assert(CGF.getContext().hasSameUnqualifiedType(E->getSubExpr()->getType(), 1862dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman E->getType()) && 1879619662a1d42e2008b865d3459c0677e149dad1bChris Lattner "Implicit cast types must be compatible"); 188e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson Visit(E->getSubExpr()); 189e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson} 190e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson 1919619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitCallExpr(const CallExpr *E) { 192e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson if (E->getCallReturnType()->isReferenceType()) { 193e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson EmitAggLoadOfLValue(E); 194e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson return; 195e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson } 196e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson 197148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson RValue RV = CGF.EmitCallExpr(E); 1984ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 199796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman} 2009619662a1d42e2008b865d3459c0677e149dad1bChris Lattner 2019619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) { 2028f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar RValue RV = CGF.EmitObjCMessageExpr(E); 2034ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 2048fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 205796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 2069c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbarvoid AggExprEmitter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 2079c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar RValue RV = CGF.EmitObjCPropertyGet(E); 2084ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 2095daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian} 2105daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 2115daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanianvoid AggExprEmitter::VisitObjCKVCRefExpr(ObjCKVCRefExpr *E) { 2125daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian RValue RV = CGF.EmitObjCPropertyGet(E); 2134ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 214148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson} 215148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 2169619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitBinComma(const BinaryOperator *E) { 2177f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitAnyExpr(E->getLHS(), 0, false, true); 21814c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.EmitAggExpr(E->getRHS(), DestPtr, VolatileDest, 21914c5cbf59cffee52275230922283a247de407712Anders Carlsson /*IgnoreResult=*/false, IsInitializer); 22007fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman} 22107fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman 222b2d963f527674275c9109252474948368b6e6161Chris Lattnervoid AggExprEmitter::VisitStmtExpr(const StmtExpr *E) { 223b2d963f527674275c9109252474948368b6e6161Chris Lattner CGF.EmitCompoundStmt(*E->getSubStmt(), true, DestPtr, VolatileDest); 224b2d963f527674275c9109252474948368b6e6161Chris Lattner} 225b2d963f527674275c9109252474948368b6e6161Chris Lattner 2269c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitBinaryOperator(const BinaryOperator *E) { 227488e993a135ce700b982bf099c3d6b856301d642Daniel Dunbar CGF.ErrorUnsupported(E, "aggregate binary expression"); 228ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 229ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 23003d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattnervoid AggExprEmitter::VisitBinAssign(const BinaryOperator *E) { 231ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // For an assignment to work, the value on the right has 232ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // to be compatible with the value on the left. 2332dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(), 2342dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman E->getRHS()->getType()) 235ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman && "Invalid assignment"); 2369c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LHS = CGF.EmitLValue(E->getLHS()); 237883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2387f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // We have to special case property setters, otherwise we must have 2397f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // a simple lvalue (no aggregates inside vectors, bitfields). 2407f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (LHS.isPropertyRef()) { 2417f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar llvm::Value *AggLoc = DestPtr; 2427f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (!AggLoc) 2437f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(E->getRHS()->getType())); 244240993d17d2b51c78d52df8743bdee4177960341Mike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 2457f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), 246240993d17d2b51c78d52df8743bdee4177960341Mike Stump RValue::getAggregate(AggLoc, VolatileDest)); 247b3589f44c5d295cd41de2c83f3475116835eeebdMike Stump } else if (LHS.isKVCRef()) { 24843f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian llvm::Value *AggLoc = DestPtr; 24943f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian if (!AggLoc) 25043f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian AggLoc = CGF.CreateTempAlloca(CGF.ConvertType(E->getRHS()->getType())); 251a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 25243f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian CGF.EmitObjCPropertySet(LHS.getKVCRefExpr(), 253a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump RValue::getAggregate(AggLoc, VolatileDest)); 2547f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } else { 255082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian if (CGF.getContext().getLangOptions().NeXTRuntime) { 256082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian QualType LHSTy = E->getLHS()->getType(); 2576217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek if (const RecordType *FDTTy = LHSTy.getTypePtr()->getAs<RecordType>()) 258082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian if (FDTTy->getDecl()->hasObjectMember()) { 259082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian LValue RHS = CGF.EmitLValue(E->getRHS()); 260082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian CGF.CGM.getObjCRuntime().EmitGCMemmoveCollectable(CGF, LHS.getAddress(), 261082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian RHS.getAddress(), 262082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian CGF.getContext().getTypeSize(LHSTy) / 8); 263082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian return; 264082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian } 265082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian } 2667f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // Codegen the RHS so that it stores directly into the LHS. 267fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump CGF.EmitAggExpr(E->getRHS(), LHS.getAddress(), LHS.isVolatileQualified()); 26849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump EmitFinalDestCopy(E, LHS, true); 2697f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } 270883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 271883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2729c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitConditionalOperator(const ConditionalOperator *E) { 2739615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 2749615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 2759615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 276883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2779c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner llvm::Value *Cond = CGF.EvaluateExprAsBool(E->getCond()); 278bfc0c1ae4b505b52b36f572a9641f99e76879cabChris Lattner Builder.CreateCondBr(Cond, LHSBlock, RHSBlock); 279883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 280fb6fa30a9b06670deb14f862dddbc49a12552939Anders Carlsson CGF.PushConditionalTempDestruction(); 2819c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(LHSBlock); 282883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 283883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // Handle the GNU extension for missing LHS. 284883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(E->getLHS() && "Must have LHS for aggregate value"); 285883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 286c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getLHS()); 287fb6fa30a9b06670deb14f862dddbc49a12552939Anders Carlsson CGF.PopConditionalTempDestruction(); 288d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 289883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 290fb6fa30a9b06670deb14f862dddbc49a12552939Anders Carlsson CGF.PushConditionalTempDestruction(); 2919c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(RHSBlock); 292883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 293c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getRHS()); 294fb6fa30a9b06670deb14f862dddbc49a12552939Anders Carlsson CGF.PopConditionalTempDestruction(); 295d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 296883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 2979c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(ContBlock); 298883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 299ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 300a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlssonvoid AggExprEmitter::VisitChooseExpr(const ChooseExpr *CE) { 301a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson Visit(CE->getChosenSubExpr(CGF.getContext())); 302a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson} 303a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson 304b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedmanvoid AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 3050785570af3ef5f8c5a0377129e41efe6f3f8d770Daniel Dunbar llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); 306ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 307ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 3080262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl if (!ArgPtr) { 309ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.ErrorUnsupported(VE, "aggregate va_arg expression"); 3100262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl return; 3110262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl } 3120262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl 3134ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(VE, LValue::MakeAddr(ArgPtr, 0)); 314b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman} 315b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman 316b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlssonvoid AggExprEmitter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { 317b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 318b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 319b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 320b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 321b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 322b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 323b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // FIXME: volatile 324b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitAggExpr(E->getSubExpr(), Val, false); 325b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson } else 326b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Visit(E->getSubExpr()); 327b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 32814c5cbf59cffee52275230922283a247de407712Anders Carlsson // Don't make this a live temporary if we're emitting an initializer expr. 32914c5cbf59cffee52275230922283a247de407712Anders Carlsson if (!IsInitializer) 33014c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.PushCXXTemporary(E->getTemporary(), Val); 331b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson} 332b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 333b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlssonvoid 33431ccf377f4a676eb6c205b47eef435de616d5e2dAnders CarlssonAggExprEmitter::VisitCXXConstructExpr(const CXXConstructExpr *E) { 335b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 336b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 337b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 338b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 339b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Val = CGF.CreateTempAlloca(CGF.ConvertTypeForMem(E->getType()), "tmp"); 340b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson } 3418e587a15da6d3457a418239d5eb4146fcbd209f3Anders Carlsson 342b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitCXXConstructExpr(Val, E); 3437f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson} 3447f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 3457f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlssonvoid AggExprEmitter::VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) { 34614c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.EmitCXXExprWithTemporaries(E, DestPtr, VolatileDest, IsInitializer); 347b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson} 348b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson 349f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV) { 3507f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // FIXME: Ignore result? 351f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // FIXME: Are initializers affected by volatile? 3523498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor if (isa<ImplicitValueInitExpr>(E)) { 3534c67834407ca6ab344dcf44fc599ad4938cfa96dDouglas Gregor EmitNullInitializationToLValue(LV, E->getType()); 3543498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor } else if (E->getType()->isComplexType()) { 3553498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false); 356c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else if (CGF.hasAggregateLLVMType(E->getType())) { 357c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitAnyExpr(E, LV.getAddress(), false); 358c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else { 359c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitStoreThroughLValue(CGF.EmitAnyExpr(E), LV, E->getType()); 360f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 361f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 362305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 363f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitNullInitializationToLValue(LValue LV, QualType T) { 364f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (!CGF.hasAggregateLLVMType(T)) { 365f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // For non-aggregates, we can store zero 366c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson llvm::Value *Null = llvm::Constant::getNullValue(CGF.ConvertType(T)); 36782397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Null), LV, T); 368f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 369f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Otherwise, just memset the whole thing to zero. This is legal 370f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // because in LLVM, all default initializers are guaranteed to have a 371f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // bit pattern of all zeros. 3720f59312e7b625fa5821a63db65377d4b3b667e99Eli Friedman // FIXME: That isn't true for member pointers! 373f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // There's a potential optimization opportunity in combining 374f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // memsets; that would be easy for arrays, but relatively 375f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // difficult for structures with the current code. 376ccf0ed885952a52caa25767c787e0bf29f4688bdEli Friedman CGF.EmitMemSetToZero(LV.getAddress(), T); 377f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 378f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 379305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 380f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::VisitInitListExpr(InitListExpr *E) { 381a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#if 0 382a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // FIXME: Disabled while we figure out what to do about 383a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // test/CodeGen/bitfield.c 384a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // 385f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // If we can, prefer a copy from a global; this is a lot less code for long 386f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // globals, and it's easier for the current optimizers to analyze. 387f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: Should we really be doing this? Should we try to avoid cases where 388f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // we emit a global with a lot of zeros? Should we try to avoid short 389f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // globals? 390c9e8f606787b0bc0c3b08e566b87cc1751694168Eli Friedman if (E->isConstantInitializer(CGF.getContext(), 0)) { 391994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::Constant* C = CGF.CGM.EmitConstantExpr(E, &CGF); 392994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalVariable* GV = 393994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman new llvm::GlobalVariable(C->getType(), true, 394994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalValue::InternalLinkage, 395994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman C, "", &CGF.CGM.getModule(), 0); 3964ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, LValue::MakeAddr(GV, 0)); 397994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman return; 398994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman } 399a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#endif 400a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor if (E->hadArrayRangeDesignator()) { 401a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor CGF.ErrorUnsupported(E, "GNU array range designator extension"); 402a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor } 403a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor 404f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Handle initialization of an array. 405f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isArrayType()) { 406f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::PointerType *APType = 407f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::PointerType>(DestPtr->getType()); 408f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::ArrayType *AType = 409f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::ArrayType>(APType->getElementType()); 410f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 411f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumInitElements = E->getNumInits(); 412922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 4139619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (E->getNumInits() > 0) { 4149619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T1 = E->getType(); 4159619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T2 = E->getInit(0)->getType(); 4162dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman if (CGF.getContext().hasSameUnqualifiedType(T1, T2)) { 4179619662a1d42e2008b865d3459c0677e149dad1bChris Lattner EmitAggLoadOfLValue(E->getInit(0)); 4189619662a1d42e2008b865d3459c0677e149dad1bChris Lattner return; 4199619662a1d42e2008b865d3459c0677e149dad1bChris Lattner } 420922696f03ec9637449e2cba260493808b4977cd3Eli Friedman } 421922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 422f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumArrayElements = AType->getNumElements(); 423c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType ElementType = CGF.getContext().getCanonicalType(E->getType()); 4244c67834407ca6ab344dcf44fc599ad4938cfa96dDouglas Gregor ElementType = CGF.getContext().getAsArrayType(ElementType)->getElementType(); 425f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 426c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner unsigned CVRqualifier = ElementType.getCVRQualifiers(); 4271e692ace08959399794363e77499b73da5494af9Eli Friedman 428f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (uint64_t i = 0; i != NumArrayElements; ++i) { 429f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 430f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (i < NumInitElements) 4311e692ace08959399794363e77499b73da5494af9Eli Friedman EmitInitializationToLValue(E->getInit(i), 4321e692ace08959399794363e77499b73da5494af9Eli Friedman LValue::MakeAddr(NextVal, CVRqualifier)); 433f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner else 4341e692ace08959399794363e77499b73da5494af9Eli Friedman EmitNullInitializationToLValue(LValue::MakeAddr(NextVal, CVRqualifier), 435f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner ElementType); 436f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 437305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio return; 438f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 439f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 440f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner assert(E->getType()->isRecordType() && "Only support structs/unions here!"); 441f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 442f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Do struct initialization; this code just sets each individual member 443f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // to the approprate value. This makes bitfield support automatic; 444f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the disadvantage is that the generated code is more difficult for 445f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the optimizer, especially with bitfields. 446f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumInitElements = E->getNumInits(); 4476217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *SD = E->getType()->getAs<RecordType>()->getDecl(); 448f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned CurInitVal = 0; 4490bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 4500bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (E->getType()->isUnionType()) { 4510bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Only initialize one field of a union. The field itself is 4520bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // specified by the initializer list. 4530bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (!E->getInitializedFieldInUnion()) { 4540bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Empty union; we have nothing to do. 4550bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 4560bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#ifndef NDEBUG 4570bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Make sure that it's really an empty and not a failure of 4580bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // semantic analysis. 45917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 46017945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 4610bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor Field != FieldEnd; ++Field) 4620bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor assert(Field->isUnnamedBitfield() && "Only unnamed bitfields allowed"); 4630bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#endif 4640bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 4650bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 4660bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 4670bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // FIXME: volatility 4680bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor FieldDecl *Field = E->getInitializedFieldInUnion(); 4690bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor LValue FieldLoc = CGF.EmitLValueForField(DestPtr, Field, true, 0); 4700bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 4710bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (NumInitElements) { 4720bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Store the initializer into the field 4730bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor EmitInitializationToLValue(E->getInit(0), FieldLoc); 4740bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } else { 4750bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Default-initialize to null 4760bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 4770bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 4780bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 4790bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 4800bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 481f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner 482f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Here we iterate over the fields; this makes it simpler to both 483f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // default-initialize fields and skip over unnamed fields. 48417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 48517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 48644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; ++Field) { 48744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // We're done once we hit the flexible array member 48844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (Field->getType()->isIncompleteArrayType()) 48944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor break; 49044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 49134e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor if (Field->isUnnamedBitfield()) 492f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner continue; 49334e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor 4941e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 4950bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor LValue FieldLoc = CGF.EmitLValueForField(DestPtr, *Field, false, 0); 49614674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian // We never generate write-barries for initialized fields. 49714674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian LValue::SetObjCNonGC(FieldLoc, true); 498f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurInitVal < NumInitElements) { 499f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Store the initializer into the field 500f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner EmitInitializationToLValue(E->getInit(CurInitVal++), FieldLoc); 501f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 502f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // We're out of initalizers; default-initialize to null 50344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 504f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 505145cd89f9233d375381aa13bd28b2d36f83e6181Lauro Ramos Venancio } 506636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel} 507636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 508ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 509ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Entry Points into this File 510ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 511ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 512e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// EmitAggExpr - Emit the computation of the specified expression of aggregate 513e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// type. The result is computed into DestPtr. Note that if DestPtr is null, 514e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// the value of the aggregate expression is not needed. If VolatileDest is 515e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// true, DestPtr cannot be 0. 516ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattnervoid CodeGenFunction::EmitAggExpr(const Expr *E, llvm::Value *DestPtr, 51714c5cbf59cffee52275230922283a247de407712Anders Carlsson bool VolatileDest, bool IgnoreResult, 51814c5cbf59cffee52275230922283a247de407712Anders Carlsson bool IsInitializer) { 519ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner assert(E && hasAggregateLLVMType(E->getType()) && 520ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner "Invalid aggregate expression to emit"); 521e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump assert ((DestPtr != 0 || VolatileDest == false) 522e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump && "volatile aggregate can't be 0"); 523ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 52414c5cbf59cffee52275230922283a247de407712Anders Carlsson AggExprEmitter(*this, DestPtr, VolatileDest, IgnoreResult, IsInitializer) 52549d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump .Visit(const_cast<Expr*>(E)); 526ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 5277482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5287482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateClear(llvm::Value *DestPtr, QualType Ty) { 5297482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 5307482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5317482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar EmitMemSetToZero(DestPtr, Ty); 5327482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 5337482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5347482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr, 53527fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump llvm::Value *SrcPtr, QualType Ty, 53627fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump bool isVolatile) { 5377482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 5387482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 53983c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // Aggregate assignment turns into llvm.memcpy. This is almost valid per 540ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // C99 6.5.16.1p3, which states "If the value being stored in an object is 541ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // read from another object that overlaps in anyway the storage of the first 542ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // object, then the overlap shall be exact and the two objects shall have 543ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // qualified or unqualified versions of a compatible type." 544ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // 54583c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // memcpy is not defined if the source and destination pointers are exactly 546ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // equal, but other compilers do this optimization, and almost every memcpy 547ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // implementation handles this case safely. If there is a libc that does not 548ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // safely handle this, we can add a target hook. 5490032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *BP = 5500032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::PointerType::getUnqual(llvm::Type::getInt8Ty(VMContext)); 5517482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (DestPtr->getType() != BP) 5527482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr = Builder.CreateBitCast(DestPtr, BP, "tmp"); 5537482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (SrcPtr->getType() != BP) 5547482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar SrcPtr = Builder.CreateBitCast(SrcPtr, BP, "tmp"); 5557482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5567482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Get size and alignment info for this aggregate. 5577482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar std::pair<uint64_t, unsigned> TypeInfo = getContext().getTypeInfo(Ty); 5587482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 5597482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // FIXME: Handle variable sized types. 5600032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = 5610032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::IntegerType::get(VMContext, LLVMPointerWidth); 5627482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 563fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // FIXME: If we have a volatile struct, the optimizer can remove what might 564fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // appear to be `extra' memory ops: 565fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 566fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // volatile struct { int i; } a, b; 567fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 568fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // int main() { 569fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 570fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 571fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // } 572fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 57349d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // we need to use a differnt call here. We use isVolatile to indicate when 57449d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // either the source or the destination is volatile. 575ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner Builder.CreateCall4(CGM.getMemCpyFn(), 5767482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr, SrcPtr, 5777482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // TypeInfo.first describes size in bits. 5784a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::ConstantInt::get(IntPtr, TypeInfo.first/8), 5790032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 5807482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar TypeInfo.second/8)); 5817482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 582