CGExprAgg.cpp revision e9979484670ca2b528146d1b681e149fdc29f7cc
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. 150195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar DestPtr = CGF.CreateMemTemp(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) { 18169cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor if (!DestPtr && E->getCastKind() != CastExpr::CK_Dynamic) { 1824ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor Visit(E->getSubExpr()); 1834ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor return; 1844ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor } 1854ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor 1863016842613674ab80796567239c15d529aff1458Anders Carlsson switch (E->getCastKind()) { 1873016842613674ab80796567239c15d529aff1458Anders Carlsson default: assert(0 && "Unhandled cast kind!"); 1883016842613674ab80796567239c15d529aff1458Anders Carlsson 18969cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor case CastExpr::CK_Dynamic: { 19069cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor assert(isa<CXXDynamicCastExpr>(E) && "CK_Dynamic without a dynamic_cast?"); 19169cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor LValue LV = CGF.EmitCheckedLValue(E->getSubExpr()); 19269cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor // FIXME: Do we also need to handle property references here? 19369cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor if (LV.isSimple()) 19469cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor CGF.EmitDynamicCast(LV.getAddress(), cast<CXXDynamicCastExpr>(E)); 19569cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor else 19669cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor CGF.CGM.ErrorUnsupported(E, "non-simple lvalue dynamic_cast"); 19769cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor 19869cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor if (DestPtr) 19969cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor CGF.CGM.ErrorUnsupported(E, "lvalue dynamic_cast with a destination"); 20069cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor break; 20169cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor } 20269cfeb1036ad22c911b7243dca0eecee72e452d3Douglas Gregor 2033016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_ToUnion: { 2044d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // GCC union extension 20534ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman QualType PtrTy = 2063016842613674ab80796567239c15d529aff1458Anders Carlsson CGF.getContext().getPointerType(E->getSubExpr()->getType()); 20734ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman llvm::Value *CastPtr = Builder.CreateBitCast(DestPtr, 20834ebf4d1767e6748a1a59a5d1935c495cd8877e8Eli Friedman CGF.ConvertType(PtrTy)); 209c6a38a47bf3908ab2183d7946498138d8b07c886Mon P Wang EmitInitializationToLValue(E->getSubExpr(), 21078e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson LValue::MakeAddr(CastPtr, Qualifiers()), 21118da88a38b82132faa7794120e17352dfacc5155Eli Friedman E->getSubExpr()->getType()); 2123016842613674ab80796567239c15d529aff1458Anders Carlsson break; 2137e91627301b05cd8f2324795e19d87a62f444c31Nuno Lopes } 2141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2154d8673b645ad86e496b886a0f80b60763f67071dAnders Carlsson // FIXME: Remove the CK_Unknown check here. 2163016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_Unknown: 2173016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_NoOp: 2183016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_UserDefinedConversion: 2193016842613674ab80796567239c15d529aff1458Anders Carlsson case CastExpr::CK_ConstructorConversion: 2203016842613674ab80796567239c15d529aff1458Anders Carlsson assert(CGF.getContext().hasSameUnqualifiedType(E->getSubExpr()->getType(), 2213016842613674ab80796567239c15d529aff1458Anders Carlsson E->getType()) && 2223016842613674ab80796567239c15d529aff1458Anders Carlsson "Implicit cast types must be compatible"); 2233016842613674ab80796567239c15d529aff1458Anders Carlsson Visit(E->getSubExpr()); 2243016842613674ab80796567239c15d529aff1458Anders Carlsson break; 225e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 226e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson case CastExpr::CK_NullToMemberPointer: { 2274ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor // If the subexpression's type is the C++0x nullptr_t, emit the 2284ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor // subexpression, which may have side effects. 2294ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor if (E->getSubExpr()->getType()->isNullPtrType()) 2304ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor Visit(E->getSubExpr()); 2314ce46c2db2b17ef52b34dbeeec01e448025c8edcDouglas Gregor 232e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson const llvm::Type *PtrDiffTy = 233e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 234e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 235e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *NullValue = llvm::Constant::getNullValue(PtrDiffTy); 236e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *Ptr = Builder.CreateStructGEP(DestPtr, 0, "ptr"); 237e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson Builder.CreateStore(NullValue, Ptr, VolatileDest); 238e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 239e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson llvm::Value *Adj = Builder.CreateStructGEP(DestPtr, 1, "adj"); 240e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson Builder.CreateStore(NullValue, Adj, VolatileDest); 241e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson 242e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson break; 243e9d34dc7afe06c9adaacad7a678a0cbbf749ea75Anders Carlsson } 24484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 245bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson case CastExpr::CK_BitCast: { 246bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson // This must be a member function pointer cast. 247bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson Visit(E->getSubExpr()); 248bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson break; 249bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson } 250bb378cbf04e343fb15ae3611a153dde60671b514Anders Carlsson 251c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman case CastExpr::CK_DerivedToBaseMemberPointer: 25284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson case CastExpr::CK_BaseToDerivedMemberPointer: { 25384080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson QualType SrcType = E->getSubExpr()->getType(); 25484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 255195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar llvm::Value *Src = CGF.CreateMemTemp(SrcType, "tmp"); 25684080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson CGF.EmitAggExpr(E->getSubExpr(), Src, SrcType.isVolatileQualified()); 25784080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 25884080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *SrcPtr = Builder.CreateStructGEP(Src, 0, "src.ptr"); 25984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson SrcPtr = Builder.CreateLoad(SrcPtr); 26084080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 26184080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *SrcAdj = Builder.CreateStructGEP(Src, 1, "src.adj"); 26284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson SrcAdj = Builder.CreateLoad(SrcAdj); 26384080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 26484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *DstPtr = Builder.CreateStructGEP(DestPtr, 0, "dst.ptr"); 26584080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson Builder.CreateStore(SrcPtr, DstPtr, VolatileDest); 26684080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 26784080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson llvm::Value *DstAdj = Builder.CreateStructGEP(DestPtr, 1, "dst.adj"); 26884080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 26984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson // Now See if we need to update the adjustment. 270c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman const CXXRecordDecl *BaseDecl = 27184080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson cast<CXXRecordDecl>(SrcType->getAs<MemberPointerType>()-> 27284080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson getClass()->getAs<RecordType>()->getDecl()); 273c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman const CXXRecordDecl *DerivedDecl = 27484080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson cast<CXXRecordDecl>(E->getType()->getAs<MemberPointerType>()-> 27584080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson getClass()->getAs<RecordType>()->getDecl()); 276c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman if (E->getCastKind() == CastExpr::CK_DerivedToBaseMemberPointer) 277c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman std::swap(DerivedDecl, BaseDecl); 278c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman 279bb7e17b52ffaa4097b4c4d7935746d23539ffe2aAnders Carlsson if (llvm::Constant *Adj = 280e04d45e05277ee04997fe59b1d194503f484c846Anders Carlsson CGF.CGM.GetNonVirtualBaseClassOffset(DerivedDecl, E->getBasePath())) { 281c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman if (E->getCastKind() == CastExpr::CK_DerivedToBaseMemberPointer) 282c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman SrcAdj = Builder.CreateSub(SrcAdj, Adj, "adj"); 283c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman else 284c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman SrcAdj = Builder.CreateAdd(SrcAdj, Adj, "adj"); 285c6fdb7765fc872eea8dfc5fb0ee984c0fbac1068Eli Friedman } 28684080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson 28784080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson Builder.CreateStore(SrcAdj, DstAdj, VolatileDest); 28884080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson break; 28984080ec16ede6a6fe85a1d991690c6bda82a59eeAnders Carlsson } 2903016842613674ab80796567239c15d529aff1458Anders Carlsson } 291e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson} 292e4707ff0bb48add651c6a1ad9acfcb22609462d1Anders Carlsson 2939619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitCallExpr(const CallExpr *E) { 294e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson if (E->getCallReturnType()->isReferenceType()) { 295e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson EmitAggLoadOfLValue(E); 296e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson return; 297e70e8f7fef3efb3d526ee25b3a0e2a4bf67a04b6Anders Carlsson } 2981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 299d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson // If the struct doesn't require GC, we can just pass the destination 300d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson // directly to EmitCall. 301d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson if (!RequiresGCollection) { 302d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson CGF.EmitCallExpr(E, ReturnValueSlot(DestPtr, VolatileDest)); 303d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson return; 304d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson } 305d2490a91341b57df7a7e54f8a707e7ecde2eeb4eAnders Carlsson 306148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson RValue RV = CGF.EmitCallExpr(E); 3074ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 308796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman} 3099619662a1d42e2008b865d3459c0677e149dad1bChris Lattner 3109619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) { 3118f2926b73ed635afecd020da787af6a837601a2bDaniel Dunbar RValue RV = CGF.EmitObjCMessageExpr(E); 3124ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 3138fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 314796ef3d4a32ce8d9e76df0d5bcab07db97883064Nate Begeman 3159c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbarvoid AggExprEmitter::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { 3169c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar RValue RV = CGF.EmitObjCPropertyGet(E); 3174ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 3185daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian} 3195daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 32009105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanianvoid AggExprEmitter::VisitObjCImplicitSetterGetterRefExpr( 32109105f52b1f28cbb1374c27c3c70f5517e2c465dFariborz Jahanian ObjCImplicitSetterGetterRefExpr *E) { 3225daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian RValue RV = CGF.EmitObjCPropertyGet(E); 3234ac20ddc7ab324a59862657f756bdd060076b137Mike Stump EmitFinalDestCopy(E, RV); 324148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson} 325148fe6772733166c720e28b7bb5084af6e624b44Anders Carlsson 3269619662a1d42e2008b865d3459c0677e149dad1bChris Lattnervoid AggExprEmitter::VisitBinComma(const BinaryOperator *E) { 3277f79f9be5916c51c35da4f126b7c12596a101607Mike Stump CGF.EmitAnyExpr(E->getLHS(), 0, false, true); 32814c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.EmitAggExpr(E->getRHS(), DestPtr, VolatileDest, 32914c5cbf59cffee52275230922283a247de407712Anders Carlsson /*IgnoreResult=*/false, IsInitializer); 33007fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman} 33107fa52ab33a75d7a5736ea5bd0d4e3134fb10c7eEli Friedman 332a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlssonvoid AggExprEmitter::VisitUnaryAddrOf(const UnaryOperator *E) { 333a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson // We have a member function pointer. 334a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson const MemberPointerType *MPT = E->getType()->getAs<MemberPointerType>(); 335babac13bb332974c8bb800b1a9714bcdf5afefccDaniel Dunbar (void) MPT; 336a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson assert(MPT->getPointeeType()->isFunctionProtoType() && 337a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson "Unexpected member pointer type!"); 338e174bd05ca9991e705f51afcfab27933b537dc63Douglas Gregor 339e174bd05ca9991e705f51afcfab27933b537dc63Douglas Gregor // The creation of member function pointers has no side effects; if 340e174bd05ca9991e705f51afcfab27933b537dc63Douglas Gregor // there is no destination pointer, we have nothing to do. 341e174bd05ca9991e705f51afcfab27933b537dc63Douglas Gregor if (!DestPtr) 342e174bd05ca9991e705f51afcfab27933b537dc63Douglas Gregor return; 343a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 344a2813cec2605ce7878d1b13471d685f689b251afDouglas Gregor const DeclRefExpr *DRE = cast<DeclRefExpr>(E->getSubExpr()); 3457af4ec744e30d573482aef7a37089d0d32cc07efAnders Carlsson const CXXMethodDecl *MD = 3467af4ec744e30d573482aef7a37089d0d32cc07efAnders Carlsson cast<CXXMethodDecl>(DRE->getDecl())->getCanonicalDecl(); 347a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 348a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson const llvm::Type *PtrDiffTy = 349a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson CGF.ConvertType(CGF.getContext().getPointerDiffType()); 350a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 351e174bd05ca9991e705f51afcfab27933b537dc63Douglas Gregor 352a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *DstPtr = Builder.CreateStructGEP(DestPtr, 0, "dst.ptr"); 353a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *FuncPtr; 354a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 355a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson if (MD->isVirtual()) { 356046c294a43024874ff35656c6e785b64e72f1f36Anders Carlsson int64_t Index = CGF.CGM.getVTables().getMethodVTableIndex(MD); 357a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 35832897fd3bd84e96d4bfa28aca0c7a907776fb855Anders Carlsson // FIXME: We shouldn't use / 8 here. 35932897fd3bd84e96d4bfa28aca0c7a907776fb855Anders Carlsson uint64_t PointerWidthInBytes = 36032897fd3bd84e96d4bfa28aca0c7a907776fb855Anders Carlsson CGF.CGM.getContext().Target.getPointerWidth(0) / 8; 36132897fd3bd84e96d4bfa28aca0c7a907776fb855Anders Carlsson 362e8a81f7e8e26275d91c073bf908a7d6d246106c5Anders Carlsson // Itanium C++ ABI 2.3: 363e8a81f7e8e26275d91c073bf908a7d6d246106c5Anders Carlsson // For a non-virtual function, this field is a simple function pointer. 364e8a81f7e8e26275d91c073bf908a7d6d246106c5Anders Carlsson // For a virtual function, it is 1 plus the virtual table offset 365e8a81f7e8e26275d91c073bf908a7d6d246106c5Anders Carlsson // (in bytes) of the function, represented as a ptrdiff_t. 36632897fd3bd84e96d4bfa28aca0c7a907776fb855Anders Carlsson FuncPtr = llvm::ConstantInt::get(PtrDiffTy, 36732897fd3bd84e96d4bfa28aca0c7a907776fb855Anders Carlsson (Index * PointerWidthInBytes) + 1); 368a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson } else { 369585fa68ca00421af6c8289866a7bde27a8e8c0ceAnders Carlsson const FunctionProtoType *FPT = MD->getType()->getAs<FunctionProtoType>(); 370585fa68ca00421af6c8289866a7bde27a8e8c0ceAnders Carlsson const llvm::Type *Ty = 371585fa68ca00421af6c8289866a7bde27a8e8c0ceAnders Carlsson CGF.CGM.getTypes().GetFunctionType(CGF.CGM.getTypes().getFunctionInfo(MD), 372585fa68ca00421af6c8289866a7bde27a8e8c0ceAnders Carlsson FPT->isVariadic()); 373585fa68ca00421af6c8289866a7bde27a8e8c0ceAnders Carlsson llvm::Constant *Fn = CGF.CGM.GetAddrOfFunction(MD, Ty); 374585fa68ca00421af6c8289866a7bde27a8e8c0ceAnders Carlsson FuncPtr = llvm::ConstantExpr::getPtrToInt(Fn, PtrDiffTy); 375a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson } 376a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson Builder.CreateStore(FuncPtr, DstPtr, VolatileDest); 377a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 378a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson llvm::Value *AdjPtr = Builder.CreateStructGEP(DestPtr, 1, "dst.adj"); 379a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 380a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson // The adjustment will always be 0. 381a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson Builder.CreateStore(llvm::ConstantInt::get(PtrDiffTy, 0), AdjPtr, 382a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson VolatileDest); 383a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson} 384a024d17048cd7fb71bfaee3876993ef2c27057beAnders Carlsson 385b2d963f527674275c9109252474948368b6e6161Chris Lattnervoid AggExprEmitter::VisitStmtExpr(const StmtExpr *E) { 386b2d963f527674275c9109252474948368b6e6161Chris Lattner CGF.EmitCompoundStmt(*E->getSubStmt(), true, DestPtr, VolatileDest); 387b2d963f527674275c9109252474948368b6e6161Chris Lattner} 388b2d963f527674275c9109252474948368b6e6161Chris Lattner 3899c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitBinaryOperator(const BinaryOperator *E) { 39052f08bcbb81c750ed62b53ed0b34aff16143b877Fariborz Jahanian if (E->getOpcode() == BinaryOperator::PtrMemD || 39152f08bcbb81c750ed62b53ed0b34aff16143b877Fariborz Jahanian E->getOpcode() == BinaryOperator::PtrMemI) 3928bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian VisitPointerToDataMemberBinaryOperator(E); 3938bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian else 3948bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian CGF.ErrorUnsupported(E, "aggregate binary expression"); 3958bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian} 3968bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian 3978bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanianvoid AggExprEmitter::VisitPointerToDataMemberBinaryOperator( 3988bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian const BinaryOperator *E) { 3998bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian LValue LV = CGF.EmitPointerToDataMemberBinaryExpr(E); 4008bfd31f9dad09cd52225d868bbd92a9bebe87775Fariborz Jahanian EmitFinalDestCopy(E, LV); 401ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 402ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 40303d6fb99224c36935c9af9f4785cb33453c99b2bChris Lattnervoid AggExprEmitter::VisitBinAssign(const BinaryOperator *E) { 404ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // For an assignment to work, the value on the right has 405ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman // to be compatible with the value on the left. 4062dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(), 4072dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman E->getRHS()->getType()) 408ff6e2b7d31b0f5494f583419e5061c32ea4e6180Eli Friedman && "Invalid assignment"); 4099c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner LValue LHS = CGF.EmitLValue(E->getLHS()); 410883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 4117f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // We have to special case property setters, otherwise we must have 4127f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // a simple lvalue (no aggregates inside vectors, bitfields). 4137f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (LHS.isPropertyRef()) { 4147f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar llvm::Value *AggLoc = DestPtr; 4157f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar if (!AggLoc) 416195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar AggLoc = CGF.CreateMemTemp(E->getRHS()->getType()); 417240993d17d2b51c78d52df8743bdee4177960341Mike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 4181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), 419240993d17d2b51c78d52df8743bdee4177960341Mike Stump RValue::getAggregate(AggLoc, VolatileDest)); 420b3589f44c5d295cd41de2c83f3475116835eeebdMike Stump } else if (LHS.isKVCRef()) { 42143f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian llvm::Value *AggLoc = DestPtr; 42243f447098d5e6162fbfb97ed38365284207a7fbeFariborz Jahanian if (!AggLoc) 423195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar AggLoc = CGF.CreateMemTemp(E->getRHS()->getType()); 424a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump CGF.EmitAggExpr(E->getRHS(), AggLoc, VolatileDest); 4251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CGF.EmitObjCPropertySet(LHS.getKVCRefExpr(), 426a49af1a4283bfeda1f418a03fd6af04bab79551dMike Stump RValue::getAggregate(AggLoc, VolatileDest)); 4277f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } else { 42808c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection = false; 429082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian if (CGF.getContext().getLangOptions().NeXTRuntime) { 430082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian QualType LHSTy = E->getLHS()->getType(); 4316217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek if (const RecordType *FDTTy = LHSTy.getTypePtr()->getAs<RecordType>()) 4321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump RequiresGCollection = FDTTy->getDecl()->hasObjectMember(); 433082b02e8403d3ee9d2ded969fbe0e5d472f04cd8Fariborz Jahanian } 4347f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar // Codegen the RHS so that it stores directly into the LHS. 43508c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian CGF.EmitAggExpr(E->getRHS(), LHS.getAddress(), LHS.isVolatileQualified(), 43608c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian false, false, RequiresGCollection); 43749d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump EmitFinalDestCopy(E, LHS, true); 4387f8ea5c5b3a6a4332a841eefdd86b0726722ea7bDaniel Dunbar } 439883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 440883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 4419c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattnervoid AggExprEmitter::VisitConditionalOperator(const ConditionalOperator *E) { 4428e274bd14bcca8466542477844b88e90e90cde1aEli Friedman if (!E->getLHS()) { 4438e274bd14bcca8466542477844b88e90e90cde1aEli Friedman CGF.ErrorUnsupported(E, "conditional operator with missing LHS"); 4448e274bd14bcca8466542477844b88e90e90cde1aEli Friedman return; 4458e274bd14bcca8466542477844b88e90e90cde1aEli Friedman } 4468e274bd14bcca8466542477844b88e90e90cde1aEli Friedman 4479615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); 4489615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); 4499615ecb44f549ae9fa2b4db6ff46bc78befbf62cDaniel Dunbar llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); 4501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4518e274bd14bcca8466542477844b88e90e90cde1aEli Friedman CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock); 4521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 45372119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.BeginConditionalBranch(); 4549c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(LHSBlock); 4551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 456883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner // Handle the GNU extension for missing LHS. 457883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner assert(E->getLHS() && "Must have LHS for aggregate value"); 458883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner 459c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getLHS()); 46072119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.EndConditionalBranch(); 461d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 4621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 46372119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.BeginConditionalBranch(); 4649c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(RHSBlock); 4651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 466c748f27f4055f5732a3c231f31dc7325c5279020Chris Lattner Visit(E->getRHS()); 46772119a887c4af39c90f10b6bdc158389071f42eaAnders Carlsson CGF.EndConditionalBranch(); 468d57a871339c7c98d58d93108b806f59bdf4e13e2Daniel Dunbar CGF.EmitBranch(ContBlock); 4691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4709c03356918aee078e925c35f9854dfdf2492dfc3Chris Lattner CGF.EmitBlock(ContBlock); 471883f6a7cc7dccb1d675e27121a82614d63492a8dChris Lattner} 472ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 473a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlssonvoid AggExprEmitter::VisitChooseExpr(const ChooseExpr *CE) { 474a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson Visit(CE->getChosenSubExpr(CGF.getContext())); 475a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson} 476a294ca8c64fbb345f32e4af9d8fabdf2f64e4883Anders Carlsson 477b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedmanvoid AggExprEmitter::VisitVAArgExpr(VAArgExpr *VE) { 4780785570af3ef5f8c5a0377129e41efe6f3f8d770Daniel Dunbar llvm::Value *ArgValue = CGF.EmitVAListRef(VE->getSubExpr()); 479ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, VE->getType()); 480ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson 4810262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl if (!ArgPtr) { 482ddf7cac45d85b73127adbbd91a2b28fc7291c57eAnders Carlsson CGF.ErrorUnsupported(VE, "aggregate va_arg expression"); 4830262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl return; 4840262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl } 4850262f02cbaa35cafb61b1b994e0adff7c422a235Sebastian Redl 4860953e767ff7817f97b3ab20896b229891eeff45bJohn McCall EmitFinalDestCopy(VE, LValue::MakeAddr(ArgPtr, Qualifiers())); 487b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman} 488b1851249d787f573b9e1312fff8ca4bbcf351f10Eli Friedman 489b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlssonvoid AggExprEmitter::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) { 490b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 4911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 492b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 493b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 494195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 495b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 496b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // FIXME: volatile 497b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitAggExpr(E->getSubExpr(), Val, false); 4981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else 499b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson Visit(E->getSubExpr()); 5001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 50114c5cbf59cffee52275230922283a247de407712Anders Carlsson // Don't make this a live temporary if we're emitting an initializer expr. 50214c5cbf59cffee52275230922283a247de407712Anders Carlsson if (!IsInitializer) 50314c5cbf59cffee52275230922283a247de407712Anders Carlsson CGF.PushCXXTemporary(E->getTemporary(), Val); 504b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson} 505b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson 506b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlssonvoid 50731ccf377f4a676eb6c205b47eef435de616d5e2dAnders CarlssonAggExprEmitter::VisitCXXConstructExpr(const CXXConstructExpr *E) { 508b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson llvm::Value *Val = DestPtr; 5091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 510b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson if (!Val) { 511b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson // Create a temporary variable. 512195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 513b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson } 5148e587a15da6d3457a418239d5eb4146fcbd209f3Anders Carlsson 51516006c901315fa12a108b4e571f187f4b676e426Douglas Gregor if (E->requiresZeroInitialization()) 51616006c901315fa12a108b4e571f187f4b676e426Douglas Gregor EmitNullInitializationToLValue(LValue::MakeAddr(Val, 517dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // FIXME: Qualifiers()? 51816006c901315fa12a108b4e571f187f4b676e426Douglas Gregor E->getType().getQualifiers()), 51916006c901315fa12a108b4e571f187f4b676e426Douglas Gregor E->getType()); 52016006c901315fa12a108b4e571f187f4b676e426Douglas Gregor 521b58d017f2b9eeed33f2ab3ede968b89cf5296bf2Anders Carlsson CGF.EmitCXXConstructExpr(Val, E); 5227f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson} 5237f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlsson 5247f6ad153565245026c7569314f65a4d4ff4ac41fAnders Carlssonvoid AggExprEmitter::VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) { 525dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 526dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 527dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump CGF.EmitCXXExprWithTemporaries(E, Val, VolatileDest, IsInitializer); 528b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson} 529b14095aa98c6fedd3625920c4ce834bcaf24d9f7Anders Carlsson 530329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopesvoid AggExprEmitter::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) { 531dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 532dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 533dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 534dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 535195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 536dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 537dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump LValue LV = LValue::MakeAddr(Val, Qualifiers()); 53830311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson EmitNullInitializationToLValue(LV, E->getType()); 53930311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson} 54030311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson 54130311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlssonvoid AggExprEmitter::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) { 542dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump llvm::Value *Val = DestPtr; 543dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump 544dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump if (!Val) { 545dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump // Create a temporary variable. 546195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar Val = CGF.CreateMemTemp(E->getType(), "tmp"); 547dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump } 548dd5614b18cbe4c528b0589b4ba722346bdb9fcceMike Stump LValue LV = LValue::MakeAddr(Val, Qualifiers()); 54930311fa6b0735b9cb73b01e25bf9652a4b9b0c53Anders Carlsson EmitNullInitializationToLValue(LV, E->getType()); 550329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes} 551329763b1e9ec8c216025e3a8379ed446d7372cbcNuno Lopes 55278e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlssonvoid 55378e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders CarlssonAggExprEmitter::EmitInitializationToLValue(Expr* E, LValue LV, QualType T) { 5547f79f9be5916c51c35da4f126b7c12596a101607Mike Stump // FIXME: Ignore result? 555f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // FIXME: Are initializers affected by volatile? 5563498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor if (isa<ImplicitValueInitExpr>(E)) { 55778e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson EmitNullInitializationToLValue(LV, T); 558e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson } else if (T->isReferenceType()) { 559e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson RValue RV = CGF.EmitReferenceBindingToExpr(E, /*IsInitializer=*/false); 560e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson CGF.EmitStoreThroughLValue(RV, LV, T); 56178e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson } else if (T->isAnyComplexType()) { 5623498bdb9e9cb300de74c7b51c92608e2902b2348Douglas Gregor CGF.EmitComplexExprIntoAddr(E, LV.getAddress(), false); 56378e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson } else if (CGF.hasAggregateLLVMType(T)) { 564c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman CGF.EmitAnyExpr(E, LV.getAddress(), false); 565c8ba9614ca5469c3ae259e3ec09792f4b8969397Eli Friedman } else { 56678e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson CGF.EmitStoreThroughLValue(CGF.EmitAnyExpr(E), LV, T); 567f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 568f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 569305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 570f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::EmitNullInitializationToLValue(LValue LV, QualType T) { 571f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (!CGF.hasAggregateLLVMType(T)) { 572f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // For non-aggregates, we can store zero 573c9c88b4159791c48e486ca94e3743b5979e2b7a6Owen Anderson llvm::Value *Null = llvm::Constant::getNullValue(CGF.ConvertType(T)); 57482397139c47a41675ab337290f6dca7644e541d5Daniel Dunbar CGF.EmitStoreThroughLValue(RValue::get(Null), LV, T); 575f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 576f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Otherwise, just memset the whole thing to zero. This is legal 577f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // because in LLVM, all default initializers are guaranteed to have a 578f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // bit pattern of all zeros. 5790f59312e7b625fa5821a63db65377d4b3b667e99Eli Friedman // FIXME: That isn't true for member pointers! 580f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // There's a potential optimization opportunity in combining 581f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // memsets; that would be easy for arrays, but relatively 582f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // difficult for structures with the current code. 583ccf0ed885952a52caa25767c787e0bf29f4688bdEli Friedman CGF.EmitMemSetToZero(LV.getAddress(), T); 584f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 585f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner} 586305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio 587f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattnervoid AggExprEmitter::VisitInitListExpr(InitListExpr *E) { 588a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#if 0 58913a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // FIXME: Assess perf here? Figure out what cases are worth optimizing here 59013a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman // (Length of globals? Chunks of zeroed-out space?). 591a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman // 592f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // If we can, prefer a copy from a global; this is a lot less code for long 593f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // globals, and it's easier for the current optimizers to analyze. 59413a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman if (llvm::Constant* C = CGF.CGM.EmitConstantExpr(E, E->getType(), &CGF)) { 595994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman llvm::GlobalVariable* GV = 59613a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman new llvm::GlobalVariable(CGF.CGM.getModule(), C->getType(), true, 59713a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman llvm::GlobalValue::InternalLinkage, C, ""); 59813a5be10b198a5dc7e3e72c54481cd8b70f68495Eli Friedman EmitFinalDestCopy(E, LValue::MakeAddr(GV, Qualifiers())); 599994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman return; 600994ffef4353056363ba5915eeecf0e1b0678f286Eli Friedman } 601a385b3c9c442831fc6a9ec6e8823b2067bd65710Eli Friedman#endif 602a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor if (E->hadArrayRangeDesignator()) { 603a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor CGF.ErrorUnsupported(E, "GNU array range designator extension"); 604a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor } 605a9c878086036de36482cc21e35a33cabe9699b0aDouglas Gregor 606f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Handle initialization of an array. 607f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (E->getType()->isArrayType()) { 608f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::PointerType *APType = 609f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::PointerType>(DestPtr->getType()); 610f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner const llvm::ArrayType *AType = 611f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner cast<llvm::ArrayType>(APType->getElementType()); 6121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 613f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumInitElements = E->getNumInits(); 614922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 6159619662a1d42e2008b865d3459c0677e149dad1bChris Lattner if (E->getNumInits() > 0) { 6169619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T1 = E->getType(); 6179619662a1d42e2008b865d3459c0677e149dad1bChris Lattner QualType T2 = E->getInit(0)->getType(); 6182dce5f8a99b5c48f1287ff3941288ca6f7fde2deEli Friedman if (CGF.getContext().hasSameUnqualifiedType(T1, T2)) { 6199619662a1d42e2008b865d3459c0677e149dad1bChris Lattner EmitAggLoadOfLValue(E->getInit(0)); 6209619662a1d42e2008b865d3459c0677e149dad1bChris Lattner return; 6219619662a1d42e2008b865d3459c0677e149dad1bChris Lattner } 622922696f03ec9637449e2cba260493808b4977cd3Eli Friedman } 623922696f03ec9637449e2cba260493808b4977cd3Eli Friedman 624f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner uint64_t NumArrayElements = AType->getNumElements(); 625c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType ElementType = CGF.getContext().getCanonicalType(E->getType()); 6264c67834407ca6ab344dcf44fc599ad4938cfa96dDouglas Gregor ElementType = CGF.getContext().getAsArrayType(ElementType)->getElementType(); 6271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6280953e767ff7817f97b3ab20896b229891eeff45bJohn McCall // FIXME: were we intentionally ignoring address spaces and GC attributes? 6290953e767ff7817f97b3ab20896b229891eeff45bJohn McCall Qualifiers Quals = CGF.MakeQualifiers(ElementType); 6301e692ace08959399794363e77499b73da5494af9Eli Friedman 631f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner for (uint64_t i = 0; i != NumArrayElements; ++i) { 632f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner llvm::Value *NextVal = Builder.CreateStructGEP(DestPtr, i, ".array"); 633f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (i < NumInitElements) 6341e692ace08959399794363e77499b73da5494af9Eli Friedman EmitInitializationToLValue(E->getInit(i), 63578e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson LValue::MakeAddr(NextVal, Quals), 63678e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson ElementType); 637f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner else 6380953e767ff7817f97b3ab20896b229891eeff45bJohn McCall EmitNullInitializationToLValue(LValue::MakeAddr(NextVal, Quals), 639f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner ElementType); 640f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 641305762c08975cd6e0bebd684ca910fa208792483Lauro Ramos Venancio return; 642f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 6431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 644f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner assert(E->getType()->isRecordType() && "Only support structs/unions here!"); 6451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 646f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Do struct initialization; this code just sets each individual member 647f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // to the approprate value. This makes bitfield support automatic; 648f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the disadvantage is that the generated code is more difficult for 649f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // the optimizer, especially with bitfields. 650f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned NumInitElements = E->getNumInits(); 6516217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *SD = E->getType()->getAs<RecordType>()->getDecl(); 652f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner unsigned CurInitVal = 0; 6530bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6540bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (E->getType()->isUnionType()) { 6550bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Only initialize one field of a union. The field itself is 6560bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // specified by the initializer list. 6570bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (!E->getInitializedFieldInUnion()) { 6580bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Empty union; we have nothing to do. 6591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6600bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#ifndef NDEBUG 6610bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Make sure that it's really an empty and not a failure of 6620bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // semantic analysis. 66317945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 66417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 6650bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor Field != FieldEnd; ++Field) 6660bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor assert(Field->isUnnamedBitfield() && "Only unnamed bitfields allowed"); 6670bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor#endif 6680bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 6690bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6700bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6710bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // FIXME: volatility 6720bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor FieldDecl *Field = E->getInitializedFieldInUnion(); 673e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson LValue FieldLoc = CGF.EmitLValueForFieldInitialization(DestPtr, Field, 0); 6740bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6750bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor if (NumInitElements) { 6760bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Store the initializer into the field 67778e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson EmitInitializationToLValue(E->getInit(0), FieldLoc, Field->getType()); 6780bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } else { 6790bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor // Default-initialize to null 6800bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 6810bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 6820bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor 6830bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor return; 6840bb76897bedb8b747efc6523efb432fc24966118Douglas Gregor } 685b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner 686b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner // If we're initializing the whole aggregate, just do it in place. 687b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner // FIXME: This is a hack around an AST bug (PR6537). 688b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner if (NumInitElements == 1 && E->getType() == E->getInit(0)->getType()) { 689b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner EmitInitializationToLValue(E->getInit(0), 690b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner LValue::MakeAddr(DestPtr, Qualifiers()), 691b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner E->getType()); 692b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner return; 693b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner } 694b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner 6951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 696f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // Here we iterate over the fields; this makes it simpler to both 697f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // default-initialize fields and skip over unnamed fields. 69817945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = SD->field_begin(), 69917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = SD->field_end(); 70044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; ++Field) { 70144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // We're done once we hit the flexible array member 70244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (Field->getType()->isIncompleteArrayType()) 70344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor break; 70444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor 70534e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor if (Field->isUnnamedBitfield()) 706f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner continue; 70734e7946831a63f96d3ba3478c74ca8e25ee52d7eDouglas Gregor 7081e692ace08959399794363e77499b73da5494af9Eli Friedman // FIXME: volatility 709e78ccb4d609a113c3e06a9c4583e845e90b1a037Anders Carlsson LValue FieldLoc = CGF.EmitLValueForFieldInitialization(DestPtr, *Field, 0); 71014674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian // We never generate write-barries for initialized fields. 71114674ffb81dccbc4e1bf78ab5b7987685819b445Fariborz Jahanian LValue::SetObjCNonGC(FieldLoc, true); 712f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner if (CurInitVal < NumInitElements) { 713b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner // Store the initializer into the field. 714b35baae19b906245b5c2266b47ef411abcc6b25aChris Lattner EmitInitializationToLValue(E->getInit(CurInitVal++), FieldLoc, 71578e83f881e59d4b8648a7b85ec6f2d36ef5cc680Anders Carlsson Field->getType()); 716f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } else { 717f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner // We're out of initalizers; default-initialize to null 71844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor EmitNullInitializationToLValue(FieldLoc, Field->getType()); 719f81557cb719dd0d1ce3713f050fb76b0a0cb729aChris Lattner } 720145cd89f9233d375381aa13bd28b2d36f83e6181Lauro Ramos Venancio } 721636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel} 722636c3d04673da8c8605d7e45640a2ff7aec648f1Devang Patel 723ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 724ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner// Entry Points into this File 725ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner//===----------------------------------------------------------------------===// 726ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner 727e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// EmitAggExpr - Emit the computation of the specified expression of aggregate 728e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// type. The result is computed into DestPtr. Note that if DestPtr is null, 729e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// the value of the aggregate expression is not needed. If VolatileDest is 730e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump/// true, DestPtr cannot be 0. 73118aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar// 73218aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar// FIXME: Take Qualifiers object. 733ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattnervoid CodeGenFunction::EmitAggExpr(const Expr *E, llvm::Value *DestPtr, 73414c5cbf59cffee52275230922283a247de407712Anders Carlsson bool VolatileDest, bool IgnoreResult, 7351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool IsInitializer, 73608c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian bool RequiresGCollection) { 737ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner assert(E && hasAggregateLLVMType(E->getType()) && 738ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner "Invalid aggregate expression to emit"); 739e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump assert ((DestPtr != 0 || VolatileDest == false) 740e1129a92b25f9b05f1b97fdd81d38ea451875414Mike Stump && "volatile aggregate can't be 0"); 7411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 74208c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian AggExprEmitter(*this, DestPtr, VolatileDest, IgnoreResult, IsInitializer, 74308c321380fff07d476a19daab6d29522c046cd49Fariborz Jahanian RequiresGCollection) 74449d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump .Visit(const_cast<Expr*>(E)); 745ee755f9118c4061b21e0a787d4a20484df36f603Chris Lattner} 7467482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar 74718aba0dd518e486d8b50523e7dafb4b5657135d2Daniel DunbarLValue CodeGenFunction::EmitAggExprToLValue(const Expr *E) { 74818aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar assert(hasAggregateLLVMType(E->getType()) && "Invalid argument!"); 74918aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar Qualifiers Q = MakeQualifiers(E->getType()); 750195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar llvm::Value *Temp = CreateMemTemp(E->getType()); 75118aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar EmitAggExpr(E, Temp, Q.hasVolatile()); 75218aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar return LValue::MakeAddr(Temp, Q); 75318aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar} 75418aba0dd518e486d8b50523e7dafb4b5657135d2Daniel Dunbar 7557482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbarvoid CodeGenFunction::EmitAggregateCopy(llvm::Value *DestPtr, 75627fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump llvm::Value *SrcPtr, QualType Ty, 75727fe2e6c97a3782a0639d87b460741e8ba5d076dMike Stump bool isVolatile) { 7587482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar assert(!Ty->isAnyComplexType() && "Shouldn't happen for complex"); 7591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7600d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson // Ignore empty classes in C++. 7610d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson if (getContext().getLangOptions().CPlusPlus) { 7620d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson if (const RecordType *RT = Ty->getAs<RecordType>()) { 763e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor CXXRecordDecl *Record = cast<CXXRecordDecl>(RT->getDecl()); 764e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor assert((Record->hasTrivialCopyConstructor() || 765e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor Record->hasTrivialCopyAssignment() || 766e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor /*FIXME!*/getContext().getLangOptions().CPlusPlus) && 767e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor "Trying to aggregate-copy a type without a trivial copy " 768e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor "constructor or assignment operator"); 769e9979484670ca2b528146d1b681e149fdc29f7ccDouglas Gregor if (Record->isEmpty()) 7700d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson return; 7710d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson } 7720d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson } 7730d7c583a4b4d0f57c6b69c66fd73babec4ef3799Anders Carlsson 77483c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // Aggregate assignment turns into llvm.memcpy. This is almost valid per 775ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // C99 6.5.16.1p3, which states "If the value being stored in an object is 776ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // read from another object that overlaps in anyway the storage of the first 777ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // object, then the overlap shall be exact and the two objects shall have 778ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // qualified or unqualified versions of a compatible type." 779ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // 78083c9629291e3f4d4619fa98f8a57e4ec347c6154Chris Lattner // memcpy is not defined if the source and destination pointers are exactly 781ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // equal, but other compilers do this optimization, and almost every memcpy 782ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // implementation handles this case safely. If there is a libc that does not 783ca4fc2c2620e184e8b96845a87b19d54f9e045c1Chris Lattner // safely handle this, we can add a target hook. 7843c0ef8cc0dc246bd3083e8cdd63005e8873d36d2Benjamin Kramer const llvm::Type *BP = llvm::Type::getInt8PtrTy(VMContext); 7857482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (DestPtr->getType() != BP) 7867482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr = Builder.CreateBitCast(DestPtr, BP, "tmp"); 7877482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar if (SrcPtr->getType() != BP) 7887482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar SrcPtr = Builder.CreateBitCast(SrcPtr, BP, "tmp"); 7891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7907482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // Get size and alignment info for this aggregate. 7917482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar std::pair<uint64_t, unsigned> TypeInfo = getContext().getTypeInfo(Ty); 7921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7937482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // FIXME: Handle variable sized types. 7940032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson const llvm::Type *IntPtr = 7950032b2781b4deb131f8c9b7968f2030bf2489cddOwen Anderson llvm::IntegerType::get(VMContext, LLVMPointerWidth); 7961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 797fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // FIXME: If we have a volatile struct, the optimizer can remove what might 798fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // appear to be `extra' memory ops: 799fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 800fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // volatile struct { int i; } a, b; 801fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 802fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // int main() { 803fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 804fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // a = b; 805fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // } 806fde6420cb9142f7f4efe5ec69a216295d83bcda4Mike Stump // 8073ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang // we need to use a different call here. We use isVolatile to indicate when 80849d1cd5a09ed3df353371fd7f206674a85e0fb45Mike Stump // either the source or the destination is volatile. 8093ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *I1Ty = llvm::Type::getInt1Ty(VMContext); 8103ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *I8Ty = llvm::Type::getInt8Ty(VMContext); 8113ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *I32Ty = llvm::Type::getInt32Ty(VMContext); 8123ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 8133ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::PointerType *DPT = cast<llvm::PointerType>(DestPtr->getType()); 8143ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *DBP = llvm::PointerType::get(I8Ty, DPT->getAddressSpace()); 8153ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang if (DestPtr->getType() != DBP) 8163ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang DestPtr = Builder.CreateBitCast(DestPtr, DBP, "tmp"); 8173ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 8183ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::PointerType *SPT = cast<llvm::PointerType>(SrcPtr->getType()); 8193ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang const llvm::Type *SBP = llvm::PointerType::get(I8Ty, SPT->getAddressSpace()); 8203ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang if (SrcPtr->getType() != SBP) 8213ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang SrcPtr = Builder.CreateBitCast(SrcPtr, SBP, "tmp"); 8223ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang 8233ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang Builder.CreateCall5(CGM.getMemCpyFn(DestPtr->getType(), SrcPtr->getType(), 8243ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang IntPtr), 8257482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar DestPtr, SrcPtr, 8267482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar // TypeInfo.first describes size in bits. 8274a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::ConstantInt::get(IntPtr, TypeInfo.first/8), 8283ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang llvm::ConstantInt::get(I32Ty, TypeInfo.second/8), 8293ecd785aff34381f3704d9cb28fe3ef85af759deMon P Wang llvm::ConstantInt::get(I1Ty, isVolatile)); 8307482d12c345c6391f8956850545e2d4aa7701ce6Daniel Dunbar} 831