Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- CGExpr.cpp - Emit LLVM Code from Expressions ---------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This contains code to emit Expr nodes as LLVM code. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "CodeGenFunction.h" |
| 15 | #include "CodeGenModule.h" |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 16 | #include "CGCall.h" |
John McCall | 4c40d98 | 2010-08-31 07:33:07 +0000 | [diff] [blame] | 17 | #include "CGCXXABI.h" |
Devang Patel | 79bfb4b | 2011-03-04 18:54:42 +0000 | [diff] [blame] | 18 | #include "CGDebugInfo.h" |
Daniel Dunbar | 198bcb4 | 2010-03-31 01:09:11 +0000 | [diff] [blame] | 19 | #include "CGRecordLayout.h" |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 20 | #include "CGObjCRuntime.h" |
John McCall | 01f151e | 2011-09-21 08:08:30 +0000 | [diff] [blame] | 21 | #include "TargetInfo.h" |
Daniel Dunbar | de7fb84 | 2008-08-11 05:00:27 +0000 | [diff] [blame] | 22 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 23 | #include "clang/AST/DeclObjC.h" |
Chandler Carruth | 06057ce | 2010-06-15 23:19:56 +0000 | [diff] [blame] | 24 | #include "clang/Frontend/CodeGenOptions.h" |
Nick Lewycky | e433072 | 2011-07-07 03:54:51 +0000 | [diff] [blame] | 25 | #include "llvm/Intrinsics.h" |
Peter Collingbourne | c5096cb | 2011-10-27 19:19:51 +0000 | [diff] [blame] | 26 | #include "llvm/LLVMContext.h" |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 27 | #include "llvm/Target/TargetData.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 28 | using namespace clang; |
| 29 | using namespace CodeGen; |
| 30 | |
| 31 | //===--------------------------------------------------------------------===// |
| 32 | // Miscellaneous Helper Methods |
| 33 | //===--------------------------------------------------------------------===// |
| 34 | |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 35 | llvm::Value *CodeGenFunction::EmitCastToVoidPtr(llvm::Value *value) { |
| 36 | unsigned addressSpace = |
| 37 | cast<llvm::PointerType>(value->getType())->getAddressSpace(); |
| 38 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 39 | llvm::PointerType *destType = Int8PtrTy; |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 40 | if (addressSpace) |
| 41 | destType = llvm::Type::getInt8PtrTy(getLLVMContext(), addressSpace); |
| 42 | |
| 43 | if (value->getType() == destType) return value; |
| 44 | return Builder.CreateBitCast(value, destType); |
| 45 | } |
| 46 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 47 | /// CreateTempAlloca - This creates a alloca and inserts it into the entry |
| 48 | /// block. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 49 | llvm::AllocaInst *CodeGenFunction::CreateTempAlloca(llvm::Type *Ty, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 50 | const Twine &Name) { |
Chris Lattner | f146684 | 2009-03-22 00:24:14 +0000 | [diff] [blame] | 51 | if (!Builder.isNamePreserving()) |
Daniel Dunbar | 259e9cc | 2009-10-19 01:21:05 +0000 | [diff] [blame] | 52 | return new llvm::AllocaInst(Ty, 0, "", AllocaInsertPt); |
Devang Patel | d35e2e0 | 2009-10-12 22:29:02 +0000 | [diff] [blame] | 53 | return new llvm::AllocaInst(Ty, 0, Name, AllocaInsertPt); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 54 | } |
| 55 | |
John McCall | ac41816 | 2010-04-22 01:10:34 +0000 | [diff] [blame] | 56 | void CodeGenFunction::InitTempAlloca(llvm::AllocaInst *Var, |
| 57 | llvm::Value *Init) { |
| 58 | llvm::StoreInst *Store = new llvm::StoreInst(Init, Var); |
| 59 | llvm::BasicBlock *Block = AllocaInsertPt->getParent(); |
| 60 | Block->getInstList().insertAfter(&*AllocaInsertPt, Store); |
| 61 | } |
| 62 | |
Chris Lattner | 121b3fa | 2010-07-05 20:21:00 +0000 | [diff] [blame] | 63 | llvm::AllocaInst *CodeGenFunction::CreateIRTemp(QualType Ty, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 64 | const Twine &Name) { |
Daniel Dunbar | 9bd4da2 | 2010-02-16 19:44:13 +0000 | [diff] [blame] | 65 | llvm::AllocaInst *Alloc = CreateTempAlloca(ConvertType(Ty), Name); |
| 66 | // FIXME: Should we prefer the preferred type alignment here? |
| 67 | CharUnits Align = getContext().getTypeAlignInChars(Ty); |
| 68 | Alloc->setAlignment(Align.getQuantity()); |
| 69 | return Alloc; |
| 70 | } |
| 71 | |
Chris Lattner | 121b3fa | 2010-07-05 20:21:00 +0000 | [diff] [blame] | 72 | llvm::AllocaInst *CodeGenFunction::CreateMemTemp(QualType Ty, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 73 | const Twine &Name) { |
Daniel Dunbar | 195337d | 2010-02-09 02:48:28 +0000 | [diff] [blame] | 74 | llvm::AllocaInst *Alloc = CreateTempAlloca(ConvertTypeForMem(Ty), Name); |
| 75 | // FIXME: Should we prefer the preferred type alignment here? |
| 76 | CharUnits Align = getContext().getTypeAlignInChars(Ty); |
| 77 | Alloc->setAlignment(Align.getQuantity()); |
| 78 | return Alloc; |
| 79 | } |
| 80 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 81 | /// EvaluateExprAsBool - Perform the usual unary conversions on the specified |
| 82 | /// expression and compare the result against zero, returning an Int1Ty value. |
| 83 | llvm::Value *CodeGenFunction::EvaluateExprAsBool(const Expr *E) { |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 84 | if (const MemberPointerType *MPT = E->getType()->getAs<MemberPointerType>()) { |
John McCall | d608cdb | 2010-08-22 10:59:02 +0000 | [diff] [blame] | 85 | llvm::Value *MemPtr = EmitScalarExpr(E); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 86 | return CGM.getCXXABI().EmitMemberPointerIsNotNull(*this, MemPtr, MPT); |
Eli Friedman | 3a17370 | 2009-12-11 09:26:29 +0000 | [diff] [blame] | 87 | } |
John McCall | 0bab0cd | 2010-08-23 01:21:21 +0000 | [diff] [blame] | 88 | |
| 89 | QualType BoolTy = getContext().BoolTy; |
Chris Lattner | 9b2dc28 | 2008-04-04 16:54:41 +0000 | [diff] [blame] | 90 | if (!E->getType()->isAnyComplexType()) |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 91 | return EmitScalarConversion(EmitScalarExpr(E), E->getType(), BoolTy); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 92 | |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 93 | return EmitComplexToScalarConversion(EmitComplexExpr(E), E->getType(),BoolTy); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 94 | } |
| 95 | |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 96 | /// EmitIgnoredExpr - Emit code to compute the specified expression, |
| 97 | /// ignoring the result. |
| 98 | void CodeGenFunction::EmitIgnoredExpr(const Expr *E) { |
| 99 | if (E->isRValue()) |
| 100 | return (void) EmitAnyExpr(E, AggValueSlot::ignored(), true); |
| 101 | |
| 102 | // Just emit it as an l-value and drop the result. |
| 103 | EmitLValue(E); |
| 104 | } |
| 105 | |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 106 | /// EmitAnyExpr - Emit code to compute the specified expression which |
| 107 | /// can have any type. The result is returned as an RValue struct. |
| 108 | /// If this is an aggregate expression, AggSlot indicates where the |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 109 | /// result should be returned. |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 110 | RValue CodeGenFunction::EmitAnyExpr(const Expr *E, AggValueSlot AggSlot, |
| 111 | bool IgnoreResult) { |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 112 | if (!hasAggregateLLVMType(E->getType())) |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 113 | return RValue::get(EmitScalarExpr(E, IgnoreResult)); |
Chris Lattner | 9b2dc28 | 2008-04-04 16:54:41 +0000 | [diff] [blame] | 114 | else if (E->getType()->isAnyComplexType()) |
John McCall | b418d74 | 2010-11-16 10:08:07 +0000 | [diff] [blame] | 115 | return RValue::getComplex(EmitComplexExpr(E, IgnoreResult, IgnoreResult)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 116 | |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 117 | EmitAggExpr(E, AggSlot, IgnoreResult); |
| 118 | return AggSlot.asRValue(); |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 119 | } |
| 120 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 121 | /// EmitAnyExprToTemp - Similary to EmitAnyExpr(), however, the result will |
| 122 | /// always be accessible even if no aggregate location is provided. |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 123 | RValue CodeGenFunction::EmitAnyExprToTemp(const Expr *E) { |
| 124 | AggValueSlot AggSlot = AggValueSlot::ignored(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 125 | |
| 126 | if (hasAggregateLLVMType(E->getType()) && |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 127 | !E->getType()->isAnyComplexType()) |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 128 | AggSlot = CreateAggTemp(E->getType(), "agg.tmp"); |
| 129 | return EmitAnyExpr(E, AggSlot); |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 130 | } |
| 131 | |
John McCall | 3d3ec1c | 2010-04-21 10:05:39 +0000 | [diff] [blame] | 132 | /// EmitAnyExprToMem - Evaluate an expression into a given memory |
| 133 | /// location. |
| 134 | void CodeGenFunction::EmitAnyExprToMem(const Expr *E, |
| 135 | llvm::Value *Location, |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 136 | Qualifiers Quals, |
John McCall | 3d3ec1c | 2010-04-21 10:05:39 +0000 | [diff] [blame] | 137 | bool IsInit) { |
Eli Friedman | 431e4b3 | 2011-06-15 18:27:44 +0000 | [diff] [blame] | 138 | if (E->getType()->isAnyComplexType()) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 139 | EmitComplexExprIntoAddr(E, Location, Quals.hasVolatile()); |
John McCall | 3d3ec1c | 2010-04-21 10:05:39 +0000 | [diff] [blame] | 140 | else if (hasAggregateLLVMType(E->getType())) |
John McCall | 7c2349b | 2011-08-25 20:40:09 +0000 | [diff] [blame] | 141 | EmitAggExpr(E, AggValueSlot::forAddr(Location, Quals, |
| 142 | AggValueSlot::IsDestructed_t(IsInit), |
John McCall | 90b2bdf | 2011-08-26 05:38:08 +0000 | [diff] [blame] | 143 | AggValueSlot::DoesNotNeedGCBarriers, |
| 144 | AggValueSlot::IsAliased_t(!IsInit))); |
John McCall | 3d3ec1c | 2010-04-21 10:05:39 +0000 | [diff] [blame] | 145 | else { |
| 146 | RValue RV = RValue::get(EmitScalarExpr(E, /*Ignore*/ false)); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 147 | LValue LV = MakeAddrLValue(Location, E->getType()); |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 148 | EmitStoreThroughLValue(RV, LV); |
John McCall | 3d3ec1c | 2010-04-21 10:05:39 +0000 | [diff] [blame] | 149 | } |
| 150 | } |
| 151 | |
Benjamin Kramer | 54353f4 | 2010-11-25 18:29:30 +0000 | [diff] [blame] | 152 | namespace { |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 153 | /// \brief An adjustment to be made to the temporary created when emitting a |
| 154 | /// reference binding, which accesses a particular subobject of that temporary. |
Benjamin Kramer | 54353f4 | 2010-11-25 18:29:30 +0000 | [diff] [blame] | 155 | struct SubobjectAdjustment { |
| 156 | enum { DerivedToBaseAdjustment, FieldAdjustment } Kind; |
| 157 | |
| 158 | union { |
| 159 | struct { |
| 160 | const CastExpr *BasePath; |
| 161 | const CXXRecordDecl *DerivedClass; |
| 162 | } DerivedToBase; |
| 163 | |
| 164 | FieldDecl *Field; |
| 165 | }; |
| 166 | |
| 167 | SubobjectAdjustment(const CastExpr *BasePath, |
| 168 | const CXXRecordDecl *DerivedClass) |
| 169 | : Kind(DerivedToBaseAdjustment) { |
| 170 | DerivedToBase.BasePath = BasePath; |
| 171 | DerivedToBase.DerivedClass = DerivedClass; |
| 172 | } |
| 173 | |
| 174 | SubobjectAdjustment(FieldDecl *Field) |
| 175 | : Kind(FieldAdjustment) { |
| 176 | this->Field = Field; |
| 177 | } |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 178 | }; |
Benjamin Kramer | 54353f4 | 2010-11-25 18:29:30 +0000 | [diff] [blame] | 179 | } |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 180 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 181 | static llvm::Value * |
Chris Lattner | cb8095f | 2011-07-20 04:59:57 +0000 | [diff] [blame] | 182 | CreateReferenceTemporary(CodeGenFunction &CGF, QualType Type, |
Anders Carlsson | 656746c | 2010-06-27 17:23:46 +0000 | [diff] [blame] | 183 | const NamedDecl *InitializedDecl) { |
| 184 | if (const VarDecl *VD = dyn_cast_or_null<VarDecl>(InitializedDecl)) { |
| 185 | if (VD->hasGlobalStorage()) { |
| 186 | llvm::SmallString<256> Name; |
Rafael Espindola | f0be979 | 2011-02-11 02:52:17 +0000 | [diff] [blame] | 187 | llvm::raw_svector_ostream Out(Name); |
| 188 | CGF.CGM.getCXXABI().getMangleContext().mangleReferenceTemporary(VD, Out); |
| 189 | Out.flush(); |
| 190 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 191 | llvm::Type *RefTempTy = CGF.ConvertTypeForMem(Type); |
Anders Carlsson | 656746c | 2010-06-27 17:23:46 +0000 | [diff] [blame] | 192 | |
| 193 | // Create the reference temporary. |
| 194 | llvm::GlobalValue *RefTemp = |
| 195 | new llvm::GlobalVariable(CGF.CGM.getModule(), |
| 196 | RefTempTy, /*isConstant=*/false, |
| 197 | llvm::GlobalValue::InternalLinkage, |
| 198 | llvm::Constant::getNullValue(RefTempTy), |
| 199 | Name.str()); |
| 200 | return RefTemp; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | return CGF.CreateMemTemp(Type, "ref.tmp"); |
| 205 | } |
| 206 | |
| 207 | static llvm::Value * |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 208 | EmitExprForReferenceBinding(CodeGenFunction &CGF, const Expr *E, |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 209 | llvm::Value *&ReferenceTemporary, |
| 210 | const CXXDestructorDecl *&ReferenceTemporaryDtor, |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 211 | QualType &ObjCARCReferenceLifetimeType, |
Anders Carlsson | 656746c | 2010-06-27 17:23:46 +0000 | [diff] [blame] | 212 | const NamedDecl *InitializedDecl) { |
Douglas Gregor | 03e8003 | 2011-06-21 17:03:29 +0000 | [diff] [blame] | 213 | // Look through expressions for materialized temporaries (for now). |
Douglas Gregor | d7b2316 | 2011-06-22 16:12:01 +0000 | [diff] [blame] | 214 | if (const MaterializeTemporaryExpr *M |
| 215 | = dyn_cast<MaterializeTemporaryExpr>(E)) { |
| 216 | // Objective-C++ ARC: |
| 217 | // If we are binding a reference to a temporary that has ownership, we |
| 218 | // need to perform retain/release operations on the temporary. |
| 219 | if (CGF.getContext().getLangOptions().ObjCAutoRefCount && |
| 220 | E->getType()->isObjCLifetimeType() && |
| 221 | (E->getType().getObjCLifetime() == Qualifiers::OCL_Strong || |
| 222 | E->getType().getObjCLifetime() == Qualifiers::OCL_Weak || |
| 223 | E->getType().getObjCLifetime() == Qualifiers::OCL_Autoreleasing)) |
| 224 | ObjCARCReferenceLifetimeType = E->getType(); |
| 225 | |
| 226 | E = M->GetTemporaryExpr(); |
| 227 | } |
Douglas Gregor | 03e8003 | 2011-06-21 17:03:29 +0000 | [diff] [blame] | 228 | |
Eli Friedman | 27a9b72 | 2009-12-19 00:20:10 +0000 | [diff] [blame] | 229 | if (const CXXDefaultArgExpr *DAE = dyn_cast<CXXDefaultArgExpr>(E)) |
| 230 | E = DAE->getExpr(); |
Anders Carlsson | b3f7442 | 2009-10-15 00:51:46 +0000 | [diff] [blame] | 231 | |
John McCall | 1a343eb | 2011-11-10 08:15:53 +0000 | [diff] [blame] | 232 | if (const ExprWithCleanups *EWC = dyn_cast<ExprWithCleanups>(E)) { |
| 233 | CGF.enterFullExpression(EWC); |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 234 | CodeGenFunction::RunCleanupsScope Scope(CGF); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 235 | |
John McCall | 1a343eb | 2011-11-10 08:15:53 +0000 | [diff] [blame] | 236 | return EmitExprForReferenceBinding(CGF, EWC->getSubExpr(), |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 237 | ReferenceTemporary, |
| 238 | ReferenceTemporaryDtor, |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 239 | ObjCARCReferenceLifetimeType, |
Anders Carlsson | 656746c | 2010-06-27 17:23:46 +0000 | [diff] [blame] | 240 | InitializedDecl); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | RValue RV; |
Douglas Gregor | da29e09 | 2011-01-22 02:44:21 +0000 | [diff] [blame] | 244 | if (E->isGLValue()) { |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 245 | // Emit the expression as an lvalue. |
| 246 | LValue LV = CGF.EmitLValue(E); |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 247 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 248 | if (LV.isSimple()) |
| 249 | return LV.getAddress(); |
Anders Carlsson | 0dc7366 | 2010-02-04 17:32:58 +0000 | [diff] [blame] | 250 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 251 | // We have to load the lvalue. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 252 | RV = CGF.EmitLoadOfLValue(LV); |
Eli Friedman | 5df0d42 | 2009-05-20 02:31:19 +0000 | [diff] [blame] | 253 | } else { |
Douglas Gregor | d7b2316 | 2011-06-22 16:12:01 +0000 | [diff] [blame] | 254 | if (!ObjCARCReferenceLifetimeType.isNull()) { |
| 255 | ReferenceTemporary = CreateReferenceTemporary(CGF, |
| 256 | ObjCARCReferenceLifetimeType, |
| 257 | InitializedDecl); |
| 258 | |
| 259 | |
| 260 | LValue RefTempDst = CGF.MakeAddrLValue(ReferenceTemporary, |
| 261 | ObjCARCReferenceLifetimeType); |
| 262 | |
| 263 | CGF.EmitScalarInit(E, dyn_cast_or_null<ValueDecl>(InitializedDecl), |
| 264 | RefTempDst, false); |
| 265 | |
| 266 | bool ExtendsLifeOfTemporary = false; |
| 267 | if (const VarDecl *Var = dyn_cast_or_null<VarDecl>(InitializedDecl)) { |
| 268 | if (Var->extendsLifetimeOfTemporary()) |
| 269 | ExtendsLifeOfTemporary = true; |
| 270 | } else if (InitializedDecl && isa<FieldDecl>(InitializedDecl)) { |
| 271 | ExtendsLifeOfTemporary = true; |
| 272 | } |
| 273 | |
| 274 | if (!ExtendsLifeOfTemporary) { |
| 275 | // Since the lifetime of this temporary isn't going to be extended, |
| 276 | // we need to clean it up ourselves at the end of the full expression. |
| 277 | switch (ObjCARCReferenceLifetimeType.getObjCLifetime()) { |
| 278 | case Qualifiers::OCL_None: |
| 279 | case Qualifiers::OCL_ExplicitNone: |
| 280 | case Qualifiers::OCL_Autoreleasing: |
| 281 | break; |
| 282 | |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 283 | case Qualifiers::OCL_Strong: { |
| 284 | assert(!ObjCARCReferenceLifetimeType->isArrayType()); |
| 285 | CleanupKind cleanupKind = CGF.getARCCleanupKind(); |
| 286 | CGF.pushDestroy(cleanupKind, |
| 287 | ReferenceTemporary, |
| 288 | ObjCARCReferenceLifetimeType, |
| 289 | CodeGenFunction::destroyARCStrongImprecise, |
| 290 | cleanupKind & EHCleanup); |
Douglas Gregor | d7b2316 | 2011-06-22 16:12:01 +0000 | [diff] [blame] | 291 | break; |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 292 | } |
Douglas Gregor | d7b2316 | 2011-06-22 16:12:01 +0000 | [diff] [blame] | 293 | |
| 294 | case Qualifiers::OCL_Weak: |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 295 | assert(!ObjCARCReferenceLifetimeType->isArrayType()); |
| 296 | CGF.pushDestroy(NormalAndEHCleanup, |
| 297 | ReferenceTemporary, |
| 298 | ObjCARCReferenceLifetimeType, |
| 299 | CodeGenFunction::destroyARCWeak, |
| 300 | /*useEHCleanupForArray*/ true); |
Douglas Gregor | d7b2316 | 2011-06-22 16:12:01 +0000 | [diff] [blame] | 301 | break; |
| 302 | } |
| 303 | |
| 304 | ObjCARCReferenceLifetimeType = QualType(); |
| 305 | } |
| 306 | |
| 307 | return ReferenceTemporary; |
| 308 | } |
| 309 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 310 | SmallVector<SubobjectAdjustment, 2> Adjustments; |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 311 | while (true) { |
Peter Collingbourne | f111d93 | 2011-04-15 00:35:48 +0000 | [diff] [blame] | 312 | E = E->IgnoreParens(); |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 313 | |
| 314 | if (const CastExpr *CE = dyn_cast<CastExpr>(E)) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 315 | if ((CE->getCastKind() == CK_DerivedToBase || |
| 316 | CE->getCastKind() == CK_UncheckedDerivedToBase) && |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 317 | E->getType()->isRecordType()) { |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 318 | E = CE->getSubExpr(); |
| 319 | CXXRecordDecl *Derived |
| 320 | = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl()); |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 321 | Adjustments.push_back(SubobjectAdjustment(CE, Derived)); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 322 | continue; |
| 323 | } |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 324 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 325 | if (CE->getCastKind() == CK_NoOp) { |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 326 | E = CE->getSubExpr(); |
| 327 | continue; |
| 328 | } |
| 329 | } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { |
John McCall | 7eb0a9e | 2010-11-24 05:12:34 +0000 | [diff] [blame] | 330 | if (!ME->isArrow() && ME->getBase()->isRValue()) { |
| 331 | assert(ME->getBase()->getType()->isRecordType()); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 332 | if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) { |
| 333 | E = ME->getBase(); |
Daniel Dunbar | 333d42d | 2010-08-21 03:37:02 +0000 | [diff] [blame] | 334 | Adjustments.push_back(SubobjectAdjustment(Field)); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 335 | continue; |
| 336 | } |
| 337 | } |
Anders Carlsson | b3f7442 | 2009-10-15 00:51:46 +0000 | [diff] [blame] | 338 | } |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 339 | |
John McCall | 7cc25fe | 2011-02-21 05:25:38 +0000 | [diff] [blame] | 340 | if (const OpaqueValueExpr *opaque = dyn_cast<OpaqueValueExpr>(E)) |
| 341 | if (opaque->getType()->isRecordType()) |
| 342 | return CGF.EmitOpaqueValueLValue(opaque).getAddress(); |
| 343 | |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 344 | // Nothing changed. |
| 345 | break; |
Anders Carlsson | 8478ce6 | 2009-08-16 17:50:25 +0000 | [diff] [blame] | 346 | } |
Anders Carlsson | b3f7442 | 2009-10-15 00:51:46 +0000 | [diff] [blame] | 347 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 348 | // Create a reference temporary if necessary. |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 349 | AggValueSlot AggSlot = AggValueSlot::ignored(); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 350 | if (CGF.hasAggregateLLVMType(E->getType()) && |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 351 | !E->getType()->isAnyComplexType()) { |
Anders Carlsson | 656746c | 2010-06-27 17:23:46 +0000 | [diff] [blame] | 352 | ReferenceTemporary = CreateReferenceTemporary(CGF, E->getType(), |
| 353 | InitializedDecl); |
John McCall | 7c2349b | 2011-08-25 20:40:09 +0000 | [diff] [blame] | 354 | AggValueSlot::IsDestructed_t isDestructed |
| 355 | = AggValueSlot::IsDestructed_t(InitializedDecl != 0); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 356 | AggSlot = AggValueSlot::forAddr(ReferenceTemporary, Qualifiers(), |
John McCall | 7c2349b | 2011-08-25 20:40:09 +0000 | [diff] [blame] | 357 | isDestructed, |
John McCall | 410ffb2 | 2011-08-25 23:04:34 +0000 | [diff] [blame] | 358 | AggValueSlot::DoesNotNeedGCBarriers, |
| 359 | AggValueSlot::IsNotAliased); |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 360 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 361 | |
Anders Carlsson | 656746c | 2010-06-27 17:23:46 +0000 | [diff] [blame] | 362 | if (InitializedDecl) { |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 363 | // Get the destructor for the reference temporary. |
| 364 | if (const RecordType *RT = E->getType()->getAs<RecordType>()) { |
| 365 | CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(RT->getDecl()); |
| 366 | if (!ClassDecl->hasTrivialDestructor()) |
Douglas Gregor | 1d110e0 | 2010-07-01 14:13:13 +0000 | [diff] [blame] | 367 | ReferenceTemporaryDtor = ClassDecl->getDestructor(); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 368 | } |
| 369 | } |
| 370 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 371 | RV = CGF.EmitAnyExpr(E, AggSlot); |
| 372 | |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 373 | // Check if need to perform derived-to-base casts and/or field accesses, to |
| 374 | // get from the temporary object we created (and, potentially, for which we |
| 375 | // extended the lifetime) to the subobject we're binding the reference to. |
| 376 | if (!Adjustments.empty()) { |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 377 | llvm::Value *Object = RV.getAggregateAddr(); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 378 | for (unsigned I = Adjustments.size(); I != 0; --I) { |
| 379 | SubobjectAdjustment &Adjustment = Adjustments[I-1]; |
| 380 | switch (Adjustment.Kind) { |
| 381 | case SubobjectAdjustment::DerivedToBaseAdjustment: |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 382 | Object = |
| 383 | CGF.GetAddressOfBaseClass(Object, |
| 384 | Adjustment.DerivedToBase.DerivedClass, |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 385 | Adjustment.DerivedToBase.BasePath->path_begin(), |
| 386 | Adjustment.DerivedToBase.BasePath->path_end(), |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 387 | /*NullCheckValue=*/false); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 388 | break; |
| 389 | |
| 390 | case SubobjectAdjustment::FieldAdjustment: { |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 391 | LValue LV = |
Daniel Dunbar | 333d42d | 2010-08-21 03:37:02 +0000 | [diff] [blame] | 392 | CGF.EmitLValueForField(Object, Adjustment.Field, 0); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 393 | if (LV.isSimple()) { |
| 394 | Object = LV.getAddress(); |
| 395 | break; |
| 396 | } |
| 397 | |
| 398 | // For non-simple lvalues, we actually have to create a copy of |
| 399 | // the object we're binding to. |
Daniel Dunbar | 333d42d | 2010-08-21 03:37:02 +0000 | [diff] [blame] | 400 | QualType T = Adjustment.Field->getType().getNonReferenceType() |
| 401 | .getUnqualifiedType(); |
Anders Carlsson | 045a6d8 | 2010-06-27 17:52:15 +0000 | [diff] [blame] | 402 | Object = CreateReferenceTemporary(CGF, T, InitializedDecl); |
Daniel Dunbar | 333d42d | 2010-08-21 03:37:02 +0000 | [diff] [blame] | 403 | LValue TempLV = CGF.MakeAddrLValue(Object, |
| 404 | Adjustment.Field->getType()); |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 405 | CGF.EmitStoreThroughLValue(CGF.EmitLoadOfLValue(LV), TempLV); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 406 | break; |
| 407 | } |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 408 | |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 409 | } |
| 410 | } |
Eli Friedman | 545aa7a | 2011-03-16 22:34:09 +0000 | [diff] [blame] | 411 | |
| 412 | return Object; |
Anders Carlsson | b3f7442 | 2009-10-15 00:51:46 +0000 | [diff] [blame] | 413 | } |
Anders Carlsson | 4bbab92 | 2009-05-20 00:36:58 +0000 | [diff] [blame] | 414 | } |
Eli Friedman | 5df0d42 | 2009-05-20 02:31:19 +0000 | [diff] [blame] | 415 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 416 | if (RV.isAggregate()) |
| 417 | return RV.getAggregateAddr(); |
Eli Friedman | 5df0d42 | 2009-05-20 02:31:19 +0000 | [diff] [blame] | 418 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 419 | // Create a temporary variable that we can bind the reference to. |
Anders Carlsson | 656746c | 2010-06-27 17:23:46 +0000 | [diff] [blame] | 420 | ReferenceTemporary = CreateReferenceTemporary(CGF, E->getType(), |
| 421 | InitializedDecl); |
| 422 | |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 423 | |
| 424 | unsigned Alignment = |
| 425 | CGF.getContext().getTypeAlignInChars(E->getType()).getQuantity(); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 426 | if (RV.isScalar()) |
| 427 | CGF.EmitStoreOfScalar(RV.getScalarVal(), ReferenceTemporary, |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 428 | /*Volatile=*/false, Alignment, E->getType()); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 429 | else |
| 430 | CGF.StoreComplexToAddr(RV.getComplexVal(), ReferenceTemporary, |
| 431 | /*Volatile=*/false); |
| 432 | return ReferenceTemporary; |
| 433 | } |
| 434 | |
| 435 | RValue |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 436 | CodeGenFunction::EmitReferenceBindingToExpr(const Expr *E, |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 437 | const NamedDecl *InitializedDecl) { |
| 438 | llvm::Value *ReferenceTemporary = 0; |
| 439 | const CXXDestructorDecl *ReferenceTemporaryDtor = 0; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 440 | QualType ObjCARCReferenceLifetimeType; |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 441 | llvm::Value *Value = EmitExprForReferenceBinding(*this, E, ReferenceTemporary, |
| 442 | ReferenceTemporaryDtor, |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 443 | ObjCARCReferenceLifetimeType, |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 444 | InitializedDecl); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 445 | if (!ReferenceTemporaryDtor && ObjCARCReferenceLifetimeType.isNull()) |
Anders Carlsson | 045a6d8 | 2010-06-27 17:52:15 +0000 | [diff] [blame] | 446 | return RValue::get(Value); |
| 447 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 448 | // Make sure to call the destructor for the reference temporary. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 449 | const VarDecl *VD = dyn_cast_or_null<VarDecl>(InitializedDecl); |
| 450 | if (VD && VD->hasGlobalStorage()) { |
| 451 | if (ReferenceTemporaryDtor) { |
Anders Carlsson | 045a6d8 | 2010-06-27 17:52:15 +0000 | [diff] [blame] | 452 | llvm::Constant *DtorFn = |
| 453 | CGM.GetAddrOfCXXDestructor(ReferenceTemporaryDtor, Dtor_Complete); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 454 | EmitCXXGlobalDtorRegistration(DtorFn, |
| 455 | cast<llvm::Constant>(ReferenceTemporary)); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 456 | } else { |
| 457 | assert(!ObjCARCReferenceLifetimeType.isNull()); |
| 458 | // Note: We intentionally do not register a global "destructor" to |
| 459 | // release the object. |
Anders Carlsson | 045a6d8 | 2010-06-27 17:52:15 +0000 | [diff] [blame] | 460 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 461 | |
| 462 | return RValue::get(Value); |
Anders Carlsson | 045a6d8 | 2010-06-27 17:52:15 +0000 | [diff] [blame] | 463 | } |
John McCall | 81407d4 | 2010-07-21 06:29:51 +0000 | [diff] [blame] | 464 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 465 | if (ReferenceTemporaryDtor) |
| 466 | PushDestructorCleanup(ReferenceTemporaryDtor, ReferenceTemporary); |
| 467 | else { |
| 468 | switch (ObjCARCReferenceLifetimeType.getObjCLifetime()) { |
| 469 | case Qualifiers::OCL_None: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 470 | llvm_unreachable( |
| 471 | "Not a reference temporary that needs to be deallocated"); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 472 | case Qualifiers::OCL_ExplicitNone: |
| 473 | case Qualifiers::OCL_Autoreleasing: |
| 474 | // Nothing to do. |
| 475 | break; |
| 476 | |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 477 | case Qualifiers::OCL_Strong: { |
| 478 | bool precise = VD && VD->hasAttr<ObjCPreciseLifetimeAttr>(); |
| 479 | CleanupKind cleanupKind = getARCCleanupKind(); |
Benjamin Kramer | 0d51676 | 2011-07-12 18:37:23 +0000 | [diff] [blame] | 480 | // This local is a GCC and MSVC compiler workaround. |
| 481 | Destroyer *destroyer = precise ? &destroyARCStrongPrecise : |
| 482 | &destroyARCStrongImprecise; |
| 483 | pushDestroy(cleanupKind, ReferenceTemporary, ObjCARCReferenceLifetimeType, |
| 484 | *destroyer, cleanupKind & EHCleanup); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 485 | break; |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 486 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 487 | |
Benjamin Kramer | 0d51676 | 2011-07-12 18:37:23 +0000 | [diff] [blame] | 488 | case Qualifiers::OCL_Weak: { |
| 489 | // This local is a GCC and MSVC compiler workaround. |
| 490 | Destroyer *destroyer = &destroyARCWeak; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 491 | // __weak objects always get EH cleanups; otherwise, exceptions |
| 492 | // could cause really nasty crashes instead of mere leaks. |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 493 | pushDestroy(NormalAndEHCleanup, ReferenceTemporary, |
Benjamin Kramer | 0d51676 | 2011-07-12 18:37:23 +0000 | [diff] [blame] | 494 | ObjCARCReferenceLifetimeType, *destroyer, true); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 495 | break; |
| 496 | } |
Benjamin Kramer | 0d51676 | 2011-07-12 18:37:23 +0000 | [diff] [blame] | 497 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 498 | } |
| 499 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 500 | return RValue::get(Value); |
Anders Carlsson | 4029ca7 | 2009-05-20 00:24:07 +0000 | [diff] [blame] | 501 | } |
| 502 | |
| 503 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 504 | /// getAccessedFieldNo - Given an encoded value and a result number, return the |
| 505 | /// input field number being accessed. |
| 506 | unsigned CodeGenFunction::getAccessedFieldNo(unsigned Idx, |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 507 | const llvm::Constant *Elts) { |
| 508 | if (isa<llvm::ConstantAggregateZero>(Elts)) |
| 509 | return 0; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 510 | |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 511 | return cast<llvm::ConstantInt>(Elts->getOperand(Idx))->getZExtValue(); |
| 512 | } |
| 513 | |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 514 | void CodeGenFunction::EmitCheck(llvm::Value *Address, unsigned Size) { |
| 515 | if (!CatchUndefined) |
| 516 | return; |
| 517 | |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 518 | // This needs to be to the standard address space. |
| 519 | Address = Builder.CreateBitCast(Address, Int8PtrTy); |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 520 | |
Benjamin Kramer | 8dd55a3 | 2011-07-14 17:45:50 +0000 | [diff] [blame] | 521 | llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::objectsize, IntPtrTy); |
Chris Lattner | c24b9c4 | 2010-04-10 18:34:14 +0000 | [diff] [blame] | 522 | |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 523 | // In time, people may want to control this and use a 1 here. |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 524 | llvm::Value *Arg = Builder.getFalse(); |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 525 | llvm::Value *C = Builder.CreateCall2(F, Address, Arg); |
| 526 | llvm::BasicBlock *Cont = createBasicBlock(); |
| 527 | llvm::BasicBlock *Check = createBasicBlock(); |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 528 | llvm::Value *NegativeOne = llvm::ConstantInt::get(IntPtrTy, -1ULL); |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 529 | Builder.CreateCondBr(Builder.CreateICmpEQ(C, NegativeOne), Cont, Check); |
| 530 | |
| 531 | EmitBlock(Check); |
| 532 | Builder.CreateCondBr(Builder.CreateICmpUGE(C, |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 533 | llvm::ConstantInt::get(IntPtrTy, Size)), |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 534 | Cont, getTrapBB()); |
| 535 | EmitBlock(Cont); |
| 536 | } |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 537 | |
Chris Lattner | dd36d32 | 2010-01-09 21:40:03 +0000 | [diff] [blame] | 538 | |
Chris Lattner | dd36d32 | 2010-01-09 21:40:03 +0000 | [diff] [blame] | 539 | CodeGenFunction::ComplexPairTy CodeGenFunction:: |
| 540 | EmitComplexPrePostIncDec(const UnaryOperator *E, LValue LV, |
| 541 | bool isInc, bool isPre) { |
| 542 | ComplexPairTy InVal = LoadComplexFromAddr(LV.getAddress(), |
| 543 | LV.isVolatileQualified()); |
| 544 | |
| 545 | llvm::Value *NextVal; |
| 546 | if (isa<llvm::IntegerType>(InVal.first->getType())) { |
| 547 | uint64_t AmountVal = isInc ? 1 : -1; |
| 548 | NextVal = llvm::ConstantInt::get(InVal.first->getType(), AmountVal, true); |
| 549 | |
| 550 | // Add the inc/dec to the real part. |
| 551 | NextVal = Builder.CreateAdd(InVal.first, NextVal, isInc ? "inc" : "dec"); |
| 552 | } else { |
| 553 | QualType ElemTy = E->getType()->getAs<ComplexType>()->getElementType(); |
| 554 | llvm::APFloat FVal(getContext().getFloatTypeSemantics(ElemTy), 1); |
| 555 | if (!isInc) |
| 556 | FVal.changeSign(); |
| 557 | NextVal = llvm::ConstantFP::get(getLLVMContext(), FVal); |
| 558 | |
| 559 | // Add the inc/dec to the real part. |
| 560 | NextVal = Builder.CreateFAdd(InVal.first, NextVal, isInc ? "inc" : "dec"); |
| 561 | } |
| 562 | |
| 563 | ComplexPairTy IncVal(NextVal, InVal.second); |
| 564 | |
| 565 | // Store the updated result through the lvalue. |
| 566 | StoreComplexToAddr(IncVal, LV.getAddress(), LV.isVolatileQualified()); |
| 567 | |
| 568 | // If this is a postinc, return the value read from memory, otherwise use the |
| 569 | // updated value. |
| 570 | return isPre ? IncVal : InVal; |
| 571 | } |
| 572 | |
| 573 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 574 | //===----------------------------------------------------------------------===// |
| 575 | // LValue Expression Emission |
| 576 | //===----------------------------------------------------------------------===// |
| 577 | |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 578 | RValue CodeGenFunction::GetUndefRValue(QualType Ty) { |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 579 | if (Ty->isVoidType()) |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 580 | return RValue::get(0); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 581 | |
| 582 | if (const ComplexType *CTy = Ty->getAs<ComplexType>()) { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 583 | llvm::Type *EltTy = ConvertType(CTy->getElementType()); |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 584 | llvm::Value *U = llvm::UndefValue::get(EltTy); |
Daniel Dunbar | 8fa73ed | 2009-01-09 20:09:28 +0000 | [diff] [blame] | 585 | return RValue::getComplex(std::make_pair(U, U)); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 586 | } |
| 587 | |
Chris Lattner | b6c504b | 2010-08-23 05:26:13 +0000 | [diff] [blame] | 588 | // If this is a use of an undefined aggregate type, the aggregate must have an |
| 589 | // identifiable address. Just because the contents of the value are undefined |
| 590 | // doesn't mean that the address can't be taken and compared. |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 591 | if (hasAggregateLLVMType(Ty)) { |
Chris Lattner | b6c504b | 2010-08-23 05:26:13 +0000 | [diff] [blame] | 592 | llvm::Value *DestPtr = CreateMemTemp(Ty, "undef.agg.tmp"); |
| 593 | return RValue::getAggregate(DestPtr); |
Daniel Dunbar | 8fa73ed | 2009-01-09 20:09:28 +0000 | [diff] [blame] | 594 | } |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 595 | |
| 596 | return RValue::get(llvm::UndefValue::get(ConvertType(Ty))); |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 597 | } |
| 598 | |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 599 | RValue CodeGenFunction::EmitUnsupportedRValue(const Expr *E, |
| 600 | const char *Name) { |
| 601 | ErrorUnsupported(E, Name); |
| 602 | return GetUndefRValue(E->getType()); |
| 603 | } |
| 604 | |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 605 | LValue CodeGenFunction::EmitUnsupportedLValue(const Expr *E, |
| 606 | const char *Name) { |
| 607 | ErrorUnsupported(E, Name); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 608 | llvm::Type *Ty = llvm::PointerType::getUnqual(ConvertType(E->getType())); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 609 | return MakeAddrLValue(llvm::UndefValue::get(Ty), E->getType()); |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 610 | } |
| 611 | |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 612 | LValue CodeGenFunction::EmitCheckedLValue(const Expr *E) { |
| 613 | LValue LV = EmitLValue(E); |
Daniel Dunbar | f0fe5bc | 2010-04-05 21:36:35 +0000 | [diff] [blame] | 614 | if (!isa<DeclRefExpr>(E) && !LV.isBitField() && LV.isSimple()) |
Ken Dyck | fe71008 | 2011-01-19 01:58:38 +0000 | [diff] [blame] | 615 | EmitCheck(LV.getAddress(), |
| 616 | getContext().getTypeSizeInChars(E->getType()).getQuantity()); |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 617 | return LV; |
| 618 | } |
| 619 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 620 | /// EmitLValue - Emit code to compute a designator that specifies the location |
| 621 | /// of the expression. |
| 622 | /// |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 623 | /// This can return one of two things: a simple address or a bitfield reference. |
| 624 | /// In either case, the LLVM Value* in the LValue structure is guaranteed to be |
| 625 | /// an LLVM pointer type. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 626 | /// |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 627 | /// If this returns a bitfield reference, nothing about the pointee type of the |
| 628 | /// LLVM value is known: For example, it may not be a pointer to an integer. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 629 | /// |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 630 | /// If this returns a normal address, and if the lvalue's C type is fixed size, |
| 631 | /// this method guarantees that the returned pointer type will point to an LLVM |
| 632 | /// type of the same size of the lvalue's type. If the lvalue has a variable |
| 633 | /// length type, this is not possible. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 634 | /// |
| 635 | LValue CodeGenFunction::EmitLValue(const Expr *E) { |
| 636 | switch (E->getStmtClass()) { |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 637 | default: return EmitUnsupportedLValue(E, "l-value expression"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 638 | |
John McCall | db45806 | 2011-11-07 03:59:57 +0000 | [diff] [blame] | 639 | case Expr::ObjCPropertyRefExprClass: |
| 640 | llvm_unreachable("cannot emit a property reference directly"); |
| 641 | |
Fariborz Jahanian | 03b2960 | 2010-06-17 19:56:20 +0000 | [diff] [blame] | 642 | case Expr::ObjCSelectorExprClass: |
| 643 | return EmitObjCSelectorLValue(cast<ObjCSelectorExpr>(E)); |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 644 | case Expr::ObjCIsaExprClass: |
| 645 | return EmitObjCIsaExpr(cast<ObjCIsaExpr>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 646 | case Expr::BinaryOperatorClass: |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 647 | return EmitBinaryOperatorLValue(cast<BinaryOperator>(E)); |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 648 | case Expr::CompoundAssignOperatorClass: |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 649 | if (!E->getType()->isAnyComplexType()) |
| 650 | return EmitCompoundAssignmentLValue(cast<CompoundAssignOperator>(E)); |
| 651 | return EmitComplexCompoundAssignmentLValue(cast<CompoundAssignOperator>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 652 | case Expr::CallExprClass: |
Anders Carlsson | faf8664 | 2009-09-01 21:18:52 +0000 | [diff] [blame] | 653 | case Expr::CXXMemberCallExprClass: |
Douglas Gregor | b460980 | 2008-11-14 16:09:21 +0000 | [diff] [blame] | 654 | case Expr::CXXOperatorCallExprClass: |
| 655 | return EmitCallExprLValue(cast<CallExpr>(E)); |
Daniel Dunbar | 5b5c9ef | 2009-02-11 20:59:32 +0000 | [diff] [blame] | 656 | case Expr::VAArgExprClass: |
| 657 | return EmitVAArgExprLValue(cast<VAArgExpr>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 658 | case Expr::DeclRefExprClass: |
Douglas Gregor | 1a49af9 | 2009-01-06 05:10:23 +0000 | [diff] [blame] | 659 | return EmitDeclRefLValue(cast<DeclRefExpr>(E)); |
Eric Christopher | 6aff47d | 2011-09-08 17:15:04 +0000 | [diff] [blame] | 660 | case Expr::ParenExprClass: |
| 661 | return EmitLValue(cast<ParenExpr>(E)->getSubExpr()); |
Peter Collingbourne | f111d93 | 2011-04-15 00:35:48 +0000 | [diff] [blame] | 662 | case Expr::GenericSelectionExprClass: |
| 663 | return EmitLValue(cast<GenericSelectionExpr>(E)->getResultExpr()); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 664 | case Expr::PredefinedExprClass: |
| 665 | return EmitPredefinedLValue(cast<PredefinedExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 666 | case Expr::StringLiteralClass: |
| 667 | return EmitStringLiteralLValue(cast<StringLiteral>(E)); |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 668 | case Expr::ObjCEncodeExprClass: |
| 669 | return EmitObjCEncodeExprLValue(cast<ObjCEncodeExpr>(E)); |
John McCall | 4b9c2d2 | 2011-11-06 09:01:30 +0000 | [diff] [blame] | 670 | case Expr::PseudoObjectExprClass: |
| 671 | return EmitPseudoObjectLValue(cast<PseudoObjectExpr>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 672 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 673 | case Expr::BlockDeclRefExprClass: |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 674 | return EmitBlockDeclRefLValue(cast<BlockDeclRefExpr>(E)); |
| 675 | |
Anders Carlsson | b58d017 | 2009-05-30 23:23:33 +0000 | [diff] [blame] | 676 | case Expr::CXXTemporaryObjectExprClass: |
| 677 | case Expr::CXXConstructExprClass: |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 678 | return EmitCXXConstructLValue(cast<CXXConstructExpr>(E)); |
| 679 | case Expr::CXXBindTemporaryExprClass: |
| 680 | return EmitCXXBindTemporaryLValue(cast<CXXBindTemporaryExpr>(E)); |
John McCall | 1a343eb | 2011-11-10 08:15:53 +0000 | [diff] [blame] | 681 | |
| 682 | case Expr::ExprWithCleanupsClass: { |
| 683 | const ExprWithCleanups *cleanups = cast<ExprWithCleanups>(E); |
| 684 | enterFullExpression(cleanups); |
| 685 | RunCleanupsScope Scope(*this); |
| 686 | return EmitLValue(cleanups->getSubExpr()); |
| 687 | } |
| 688 | |
Douglas Gregor | ed8abf1 | 2010-07-08 06:14:04 +0000 | [diff] [blame] | 689 | case Expr::CXXScalarValueInitExprClass: |
| 690 | return EmitNullInitializationLValue(cast<CXXScalarValueInitExpr>(E)); |
Anders Carlsson | 370e538 | 2009-11-14 01:51:50 +0000 | [diff] [blame] | 691 | case Expr::CXXDefaultArgExprClass: |
| 692 | return EmitLValue(cast<CXXDefaultArgExpr>(E)->getExpr()); |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 693 | case Expr::CXXTypeidExprClass: |
| 694 | return EmitCXXTypeidLValue(cast<CXXTypeidExpr>(E)); |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 695 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 696 | case Expr::ObjCMessageExprClass: |
| 697 | return EmitObjCMessageExprLValue(cast<ObjCMessageExpr>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 698 | case Expr::ObjCIvarRefExprClass: |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 699 | return EmitObjCIvarRefLValue(cast<ObjCIvarRefExpr>(E)); |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 700 | case Expr::StmtExprClass: |
| 701 | return EmitStmtExprLValue(cast<StmtExpr>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 702 | case Expr::UnaryOperatorClass: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 703 | return EmitUnaryOpLValue(cast<UnaryOperator>(E)); |
| 704 | case Expr::ArraySubscriptExprClass: |
| 705 | return EmitArraySubscriptExpr(cast<ArraySubscriptExpr>(E)); |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 706 | case Expr::ExtVectorElementExprClass: |
| 707 | return EmitExtVectorElementExpr(cast<ExtVectorElementExpr>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 708 | case Expr::MemberExprClass: |
Douglas Gregor | bd4c4ae | 2009-08-26 22:36:53 +0000 | [diff] [blame] | 709 | return EmitMemberExpr(cast<MemberExpr>(E)); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 710 | case Expr::CompoundLiteralExprClass: |
| 711 | return EmitCompoundLiteralLValue(cast<CompoundLiteralExpr>(E)); |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 712 | case Expr::ConditionalOperatorClass: |
Anders Carlsson | 6fcec8b | 2009-09-15 16:35:24 +0000 | [diff] [blame] | 713 | return EmitConditionalOperatorLValue(cast<ConditionalOperator>(E)); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 714 | case Expr::BinaryConditionalOperatorClass: |
| 715 | return EmitConditionalOperatorLValue(cast<BinaryConditionalOperator>(E)); |
Chris Lattner | 670a62c | 2008-12-12 05:35:08 +0000 | [diff] [blame] | 716 | case Expr::ChooseExprClass: |
Eli Friedman | 7976932 | 2009-03-04 05:52:32 +0000 | [diff] [blame] | 717 | return EmitLValue(cast<ChooseExpr>(E)->getChosenSubExpr(getContext())); |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 718 | case Expr::OpaqueValueExprClass: |
| 719 | return EmitOpaqueValueLValue(cast<OpaqueValueExpr>(E)); |
John McCall | 91a5755 | 2011-07-15 05:09:51 +0000 | [diff] [blame] | 720 | case Expr::SubstNonTypeTemplateParmExprClass: |
| 721 | return EmitLValue(cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement()); |
Chris Lattner | c3953a6 | 2009-03-18 04:02:57 +0000 | [diff] [blame] | 722 | case Expr::ImplicitCastExprClass: |
| 723 | case Expr::CStyleCastExprClass: |
| 724 | case Expr::CXXFunctionalCastExprClass: |
| 725 | case Expr::CXXStaticCastExprClass: |
| 726 | case Expr::CXXDynamicCastExprClass: |
| 727 | case Expr::CXXReinterpretCastExprClass: |
| 728 | case Expr::CXXConstCastExprClass: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 729 | case Expr::ObjCBridgedCastExprClass: |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 730 | return EmitCastLValue(cast<CastExpr>(E)); |
Douglas Gregor | 03e8003 | 2011-06-21 17:03:29 +0000 | [diff] [blame] | 731 | |
| 732 | case Expr::MaterializeTemporaryExprClass: |
| 733 | return EmitMaterializeTemporaryExpr(cast<MaterializeTemporaryExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 734 | } |
| 735 | } |
| 736 | |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 737 | llvm::Value *CodeGenFunction::EmitLoadOfScalar(LValue lvalue) { |
| 738 | return EmitLoadOfScalar(lvalue.getAddress(), lvalue.isVolatile(), |
| 739 | lvalue.getAlignment(), lvalue.getType(), |
| 740 | lvalue.getTBAAInfo()); |
| 741 | } |
| 742 | |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 743 | llvm::Value *CodeGenFunction::EmitLoadOfScalar(llvm::Value *Addr, bool Volatile, |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 744 | unsigned Alignment, QualType Ty, |
| 745 | llvm::MDNode *TBAAInfo) { |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 746 | llvm::LoadInst *Load = Builder.CreateLoad(Addr); |
Daniel Dunbar | 2da84ff | 2009-11-29 21:23:36 +0000 | [diff] [blame] | 747 | if (Volatile) |
| 748 | Load->setVolatile(true); |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 749 | if (Alignment) |
| 750 | Load->setAlignment(Alignment); |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 751 | if (TBAAInfo) |
| 752 | CGM.DecorateInstruction(Load, TBAAInfo); |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 753 | |
John McCall | 26815d9 | 2010-10-27 20:58:56 +0000 | [diff] [blame] | 754 | return EmitFromMemory(Load, Ty); |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 755 | } |
| 756 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 757 | static bool isBooleanUnderlyingType(QualType Ty) { |
| 758 | if (const EnumType *ET = dyn_cast<EnumType>(Ty)) |
| 759 | return ET->getDecl()->getIntegerType()->isBooleanType(); |
| 760 | return false; |
| 761 | } |
| 762 | |
John McCall | 26815d9 | 2010-10-27 20:58:56 +0000 | [diff] [blame] | 763 | llvm::Value *CodeGenFunction::EmitToMemory(llvm::Value *Value, QualType Ty) { |
| 764 | // Bool has a different representation in memory than in registers. |
| 765 | if (Ty->isBooleanType() || isBooleanUnderlyingType(Ty)) { |
| 766 | // This should really always be an i1, but sometimes it's already |
| 767 | // an i8, and it's awkward to track those cases down. |
| 768 | if (Value->getType()->isIntegerTy(1)) |
| 769 | return Builder.CreateZExt(Value, Builder.getInt8Ty(), "frombool"); |
| 770 | assert(Value->getType()->isIntegerTy(8) && "value rep of bool not i1/i8"); |
| 771 | } |
| 772 | |
| 773 | return Value; |
| 774 | } |
| 775 | |
| 776 | llvm::Value *CodeGenFunction::EmitFromMemory(llvm::Value *Value, QualType Ty) { |
| 777 | // Bool has a different representation in memory than in registers. |
| 778 | if (Ty->isBooleanType() || isBooleanUnderlyingType(Ty)) { |
| 779 | assert(Value->getType()->isIntegerTy(8) && "memory rep of bool not i8"); |
| 780 | return Builder.CreateTrunc(Value, Builder.getInt1Ty(), "tobool"); |
| 781 | } |
| 782 | |
| 783 | return Value; |
| 784 | } |
| 785 | |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 786 | void CodeGenFunction::EmitStoreOfScalar(llvm::Value *Value, llvm::Value *Addr, |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 787 | bool Volatile, unsigned Alignment, |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 788 | QualType Ty, |
| 789 | llvm::MDNode *TBAAInfo) { |
John McCall | 26815d9 | 2010-10-27 20:58:56 +0000 | [diff] [blame] | 790 | Value = EmitToMemory(Value, Ty); |
Chris Lattner | 12569fb | 2011-07-10 03:38:35 +0000 | [diff] [blame] | 791 | |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 792 | llvm::StoreInst *Store = Builder.CreateStore(Value, Addr, Volatile); |
| 793 | if (Alignment) |
| 794 | Store->setAlignment(Alignment); |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 795 | if (TBAAInfo) |
| 796 | CGM.DecorateInstruction(Store, TBAAInfo); |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 797 | } |
| 798 | |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 799 | void CodeGenFunction::EmitStoreOfScalar(llvm::Value *value, LValue lvalue) { |
| 800 | EmitStoreOfScalar(value, lvalue.getAddress(), lvalue.isVolatile(), |
| 801 | lvalue.getAlignment(), lvalue.getType(), |
| 802 | lvalue.getTBAAInfo()); |
| 803 | } |
| 804 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 805 | /// EmitLoadOfLValue - Given an expression that represents a value lvalue, this |
| 806 | /// method emits the address of the lvalue, then loads the result as an rvalue, |
| 807 | /// returning the rvalue. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 808 | RValue CodeGenFunction::EmitLoadOfLValue(LValue LV) { |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 809 | if (LV.isObjCWeak()) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 810 | // load of a __weak object. |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 811 | llvm::Value *AddrWeakObj = LV.getAddress(); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 812 | return RValue::get(CGM.getObjCRuntime().EmitObjCWeakRead(*this, |
| 813 | AddrWeakObj)); |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 814 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 815 | if (LV.getQuals().getObjCLifetime() == Qualifiers::OCL_Weak) |
| 816 | return RValue::get(EmitARCLoadWeak(LV.getAddress())); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 817 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 818 | if (LV.isSimple()) { |
John McCall | e6d134b | 2011-06-27 21:24:11 +0000 | [diff] [blame] | 819 | assert(!LV.getType()->isFunctionType()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 820 | |
John McCall | d608cdb | 2010-08-22 10:59:02 +0000 | [diff] [blame] | 821 | // Everything needs a load. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 822 | return RValue::get(EmitLoadOfScalar(LV)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 823 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 824 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 825 | if (LV.isVectorElt()) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 826 | llvm::Value *Vec = Builder.CreateLoad(LV.getVectorAddr(), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 827 | LV.isVolatileQualified()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 828 | return RValue::get(Builder.CreateExtractElement(Vec, LV.getVectorIdx(), |
| 829 | "vecext")); |
| 830 | } |
Chris Lattner | 46ea8eb | 2007-08-03 00:16:29 +0000 | [diff] [blame] | 831 | |
| 832 | // If this is a reference to a subset of the elements of a vector, either |
| 833 | // shuffle the input or extract/insert them as appropriate. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 834 | if (LV.isExtVectorElt()) |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 835 | return EmitLoadOfExtVectorElementLValue(LV); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 836 | |
John McCall | db45806 | 2011-11-07 03:59:57 +0000 | [diff] [blame] | 837 | assert(LV.isBitField() && "Unknown LValue type!"); |
| 838 | return EmitLoadOfBitfieldLValue(LV); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 839 | } |
| 840 | |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 841 | RValue CodeGenFunction::EmitLoadOfBitfieldLValue(LValue LV) { |
Daniel Dunbar | efbf487 | 2010-04-06 01:07:44 +0000 | [diff] [blame] | 842 | const CGBitFieldInfo &Info = LV.getBitFieldInfo(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 843 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 844 | // Get the output type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 845 | llvm::Type *ResLTy = ConvertType(LV.getType()); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 846 | unsigned ResSizeInBits = CGM.getTargetData().getTypeSizeInBits(ResLTy); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 847 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 848 | // Compute the result as an OR of all of the individual component accesses. |
| 849 | llvm::Value *Res = 0; |
| 850 | for (unsigned i = 0, e = Info.getNumComponents(); i != e; ++i) { |
| 851 | const CGBitFieldInfo::AccessInfo &AI = Info.getComponent(i); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 852 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 853 | // Get the field pointer. |
| 854 | llvm::Value *Ptr = LV.getBitFieldBaseAddr(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 855 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 856 | // Only offset by the field index if used, so that incoming values are not |
| 857 | // required to be structures. |
| 858 | if (AI.FieldIndex) |
| 859 | Ptr = Builder.CreateStructGEP(Ptr, AI.FieldIndex, "bf.field"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 860 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 861 | // Offset by the byte offset, if used. |
Ken Dyck | 28ebde5 | 2011-04-24 10:04:59 +0000 | [diff] [blame] | 862 | if (!AI.FieldByteOffset.isZero()) { |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 863 | Ptr = EmitCastToVoidPtr(Ptr); |
Ken Dyck | 28ebde5 | 2011-04-24 10:04:59 +0000 | [diff] [blame] | 864 | Ptr = Builder.CreateConstGEP1_32(Ptr, AI.FieldByteOffset.getQuantity(), |
| 865 | "bf.field.offs"); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 866 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 867 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 868 | // Cast to the access type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 869 | llvm::Type *PTy = llvm::Type::getIntNPtrTy(getLLVMContext(), |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 870 | AI.AccessWidth, |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 871 | CGM.getContext().getTargetAddressSpace(LV.getType())); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 872 | Ptr = Builder.CreateBitCast(Ptr, PTy); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 873 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 874 | // Perform the load. |
| 875 | llvm::LoadInst *Load = Builder.CreateLoad(Ptr, LV.isVolatileQualified()); |
Ken Dyck | b9e6b2c | 2011-04-24 10:13:17 +0000 | [diff] [blame] | 876 | if (!AI.AccessAlignment.isZero()) |
| 877 | Load->setAlignment(AI.AccessAlignment.getQuantity()); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 878 | |
| 879 | // Shift out unused low bits and mask out unused high bits. |
| 880 | llvm::Value *Val = Load; |
| 881 | if (AI.FieldBitStart) |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 882 | Val = Builder.CreateLShr(Load, AI.FieldBitStart); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 883 | Val = Builder.CreateAnd(Val, llvm::APInt::getLowBitsSet(AI.AccessWidth, |
| 884 | AI.TargetBitWidth), |
| 885 | "bf.clear"); |
| 886 | |
| 887 | // Extend or truncate to the target size. |
| 888 | if (AI.AccessWidth < ResSizeInBits) |
| 889 | Val = Builder.CreateZExt(Val, ResLTy); |
| 890 | else if (AI.AccessWidth > ResSizeInBits) |
| 891 | Val = Builder.CreateTrunc(Val, ResLTy); |
| 892 | |
| 893 | // Shift into place, and OR into the result. |
| 894 | if (AI.TargetBitOffset) |
| 895 | Val = Builder.CreateShl(Val, AI.TargetBitOffset); |
| 896 | Res = Res ? Builder.CreateOr(Res, Val) : Val; |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 897 | } |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 898 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 899 | // If the bit-field is signed, perform the sign-extension. |
| 900 | // |
| 901 | // FIXME: This can easily be folded into the load of the high bits, which |
| 902 | // could also eliminate the mask of high bits in some situations. |
| 903 | if (Info.isSigned()) { |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 904 | unsigned ExtraBits = ResSizeInBits - Info.getSize(); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 905 | if (ExtraBits) |
| 906 | Res = Builder.CreateAShr(Builder.CreateShl(Res, ExtraBits), |
| 907 | ExtraBits, "bf.val.sext"); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 908 | } |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 909 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 910 | return RValue::get(Res); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 911 | } |
| 912 | |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 913 | // If this is a reference to a subset of the elements of a vector, create an |
| 914 | // appropriate shufflevector. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 915 | RValue CodeGenFunction::EmitLoadOfExtVectorElementLValue(LValue LV) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 916 | llvm::Value *Vec = Builder.CreateLoad(LV.getExtVectorAddr(), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 917 | LV.isVolatileQualified()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 918 | |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 919 | const llvm::Constant *Elts = LV.getExtVectorElts(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 920 | |
| 921 | // If the result of the expression is a non-vector type, we must be extracting |
| 922 | // a single element. Just codegen as an extractelement. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 923 | const VectorType *ExprVT = LV.getType()->getAs<VectorType>(); |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 924 | if (!ExprVT) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 925 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 926 | llvm::Value *Elt = llvm::ConstantInt::get(Int32Ty, InIdx); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 927 | return RValue::get(Builder.CreateExtractElement(Vec, Elt)); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 928 | } |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 929 | |
| 930 | // Always use shuffle vector to try to retain the original program structure |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 931 | unsigned NumResultElts = ExprVT->getNumElements(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 932 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 933 | SmallVector<llvm::Constant*, 4> Mask; |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 934 | for (unsigned i = 0; i != NumResultElts; ++i) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 935 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 936 | Mask.push_back(llvm::ConstantInt::get(Int32Ty, InIdx)); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 937 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 938 | |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 939 | llvm::Value *MaskV = llvm::ConstantVector::get(Mask); |
| 940 | Vec = Builder.CreateShuffleVector(Vec, llvm::UndefValue::get(Vec->getType()), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 941 | MaskV); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 942 | return RValue::get(Vec); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 943 | } |
| 944 | |
| 945 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 946 | |
| 947 | /// EmitStoreThroughLValue - Store the specified rvalue into the specified |
| 948 | /// lvalue, where both are guaranteed to the have the same type, and that type |
| 949 | /// is 'Ty'. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 950 | void CodeGenFunction::EmitStoreThroughLValue(RValue Src, LValue Dst) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 951 | if (!Dst.isSimple()) { |
| 952 | if (Dst.isVectorElt()) { |
| 953 | // Read/modify/write the vector, inserting the new element. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 954 | llvm::Value *Vec = Builder.CreateLoad(Dst.getVectorAddr(), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 955 | Dst.isVolatileQualified()); |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 956 | Vec = Builder.CreateInsertElement(Vec, Src.getScalarVal(), |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 957 | Dst.getVectorIdx(), "vecins"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 958 | Builder.CreateStore(Vec, Dst.getVectorAddr(),Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 959 | return; |
| 960 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 961 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 962 | // If this is an update of extended vector elements, insert them as |
| 963 | // appropriate. |
| 964 | if (Dst.isExtVectorElt()) |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 965 | return EmitStoreThroughExtVectorComponentLValue(Src, Dst); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 966 | |
John McCall | db45806 | 2011-11-07 03:59:57 +0000 | [diff] [blame] | 967 | assert(Dst.isBitField() && "Unknown LValue type"); |
| 968 | return EmitStoreThroughBitfieldLValue(Src, Dst); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 969 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 970 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 971 | // There's special magic for assigning into an ARC-qualified l-value. |
| 972 | if (Qualifiers::ObjCLifetime Lifetime = Dst.getQuals().getObjCLifetime()) { |
| 973 | switch (Lifetime) { |
| 974 | case Qualifiers::OCL_None: |
| 975 | llvm_unreachable("present but none"); |
| 976 | |
| 977 | case Qualifiers::OCL_ExplicitNone: |
| 978 | // nothing special |
| 979 | break; |
| 980 | |
| 981 | case Qualifiers::OCL_Strong: |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 982 | EmitARCStoreStrong(Dst, Src.getScalarVal(), /*ignore*/ true); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 983 | return; |
| 984 | |
| 985 | case Qualifiers::OCL_Weak: |
| 986 | EmitARCStoreWeak(Dst.getAddress(), Src.getScalarVal(), /*ignore*/ true); |
| 987 | return; |
| 988 | |
| 989 | case Qualifiers::OCL_Autoreleasing: |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 990 | Src = RValue::get(EmitObjCExtendObjectLifetime(Dst.getType(), |
| 991 | Src.getScalarVal())); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 992 | // fall into the normal path |
| 993 | break; |
| 994 | } |
| 995 | } |
| 996 | |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 997 | if (Dst.isObjCWeak() && !Dst.isNonGC()) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 998 | // load of a __weak object. |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 999 | llvm::Value *LvalueDst = Dst.getAddress(); |
| 1000 | llvm::Value *src = Src.getScalarVal(); |
Mike Stump | f33651c | 2009-04-14 00:57:29 +0000 | [diff] [blame] | 1001 | CGM.getObjCRuntime().EmitObjCWeakAssign(*this, src, LvalueDst); |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 1002 | return; |
| 1003 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1004 | |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 1005 | if (Dst.isObjCStrong() && !Dst.isNonGC()) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1006 | // load of a __strong object. |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 1007 | llvm::Value *LvalueDst = Dst.getAddress(); |
| 1008 | llvm::Value *src = Src.getScalarVal(); |
Fariborz Jahanian | 6c7a1f3 | 2009-09-24 22:25:38 +0000 | [diff] [blame] | 1009 | if (Dst.isObjCIvar()) { |
| 1010 | assert(Dst.getBaseIvarExp() && "BaseIvarExp is NULL"); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1011 | llvm::Type *ResultType = ConvertType(getContext().LongTy); |
Fariborz Jahanian | 6c7a1f3 | 2009-09-24 22:25:38 +0000 | [diff] [blame] | 1012 | llvm::Value *RHS = EmitScalarExpr(Dst.getBaseIvarExp()); |
Fariborz Jahanian | 76368e8 | 2009-09-25 00:00:20 +0000 | [diff] [blame] | 1013 | llvm::Value *dst = RHS; |
Fariborz Jahanian | 6c7a1f3 | 2009-09-24 22:25:38 +0000 | [diff] [blame] | 1014 | RHS = Builder.CreatePtrToInt(RHS, ResultType, "sub.ptr.rhs.cast"); |
| 1015 | llvm::Value *LHS = |
| 1016 | Builder.CreatePtrToInt(LvalueDst, ResultType, "sub.ptr.lhs.cast"); |
| 1017 | llvm::Value *BytesBetween = Builder.CreateSub(LHS, RHS, "ivar.offset"); |
Fariborz Jahanian | 76368e8 | 2009-09-25 00:00:20 +0000 | [diff] [blame] | 1018 | CGM.getObjCRuntime().EmitObjCIvarAssign(*this, src, dst, |
Fariborz Jahanian | 6c7a1f3 | 2009-09-24 22:25:38 +0000 | [diff] [blame] | 1019 | BytesBetween); |
Fariborz Jahanian | 021a7a6 | 2010-07-20 20:30:03 +0000 | [diff] [blame] | 1020 | } else if (Dst.isGlobalObjCRef()) { |
| 1021 | CGM.getObjCRuntime().EmitObjCGlobalAssign(*this, src, LvalueDst, |
| 1022 | Dst.isThreadLocalRef()); |
| 1023 | } |
Fariborz Jahanian | bf63b87 | 2009-05-04 23:27:20 +0000 | [diff] [blame] | 1024 | else |
| 1025 | CGM.getObjCRuntime().EmitObjCStrongCastAssign(*this, src, LvalueDst); |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 1026 | return; |
| 1027 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1028 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 1029 | assert(Src.isScalar() && "Can't emit an agg store with this method"); |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1030 | EmitStoreOfScalar(Src.getScalarVal(), Dst); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1031 | } |
| 1032 | |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 1033 | void CodeGenFunction::EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1034 | llvm::Value **Result) { |
Daniel Dunbar | efbf487 | 2010-04-06 01:07:44 +0000 | [diff] [blame] | 1035 | const CGBitFieldInfo &Info = Dst.getBitFieldInfo(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 1036 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1037 | // Get the output type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1038 | llvm::Type *ResLTy = ConvertTypeForMem(Dst.getType()); |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1039 | unsigned ResSizeInBits = CGM.getTargetData().getTypeSizeInBits(ResLTy); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 1040 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1041 | // Get the source value, truncated to the width of the bit-field. |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1042 | llvm::Value *SrcVal = Src.getScalarVal(); |
Anders Carlsson | 4803535 | 2010-04-17 21:52:22 +0000 | [diff] [blame] | 1043 | |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1044 | if (Dst.getType()->isBooleanType()) |
Anders Carlsson | 4803535 | 2010-04-17 21:52:22 +0000 | [diff] [blame] | 1045 | SrcVal = Builder.CreateIntCast(SrcVal, ResLTy, /*IsSigned=*/false); |
| 1046 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1047 | SrcVal = Builder.CreateAnd(SrcVal, llvm::APInt::getLowBitsSet(ResSizeInBits, |
| 1048 | Info.getSize()), |
| 1049 | "bf.value"); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 1050 | |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1051 | // Return the new value of the bit-field, if requested. |
| 1052 | if (Result) { |
| 1053 | // Cast back to the proper type for result. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1054 | llvm::Type *SrcTy = Src.getScalarVal()->getType(); |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1055 | llvm::Value *ReloadVal = Builder.CreateIntCast(SrcVal, SrcTy, false, |
| 1056 | "bf.reload.val"); |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1057 | |
| 1058 | // Sign extend if necessary. |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1059 | if (Info.isSigned()) { |
| 1060 | unsigned ExtraBits = ResSizeInBits - Info.getSize(); |
| 1061 | if (ExtraBits) |
| 1062 | ReloadVal = Builder.CreateAShr(Builder.CreateShl(ReloadVal, ExtraBits), |
| 1063 | ExtraBits, "bf.reload.sext"); |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1064 | } |
| 1065 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1066 | *Result = ReloadVal; |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1067 | } |
| 1068 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1069 | // Iterate over the components, writing each piece to memory. |
| 1070 | for (unsigned i = 0, e = Info.getNumComponents(); i != e; ++i) { |
| 1071 | const CGBitFieldInfo::AccessInfo &AI = Info.getComponent(i); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 1072 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1073 | // Get the field pointer. |
| 1074 | llvm::Value *Ptr = Dst.getBitFieldBaseAddr(); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1075 | unsigned addressSpace = |
| 1076 | cast<llvm::PointerType>(Ptr->getType())->getAddressSpace(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1077 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1078 | // Only offset by the field index if used, so that incoming values are not |
| 1079 | // required to be structures. |
| 1080 | if (AI.FieldIndex) |
| 1081 | Ptr = Builder.CreateStructGEP(Ptr, AI.FieldIndex, "bf.field"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1082 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1083 | // Offset by the byte offset, if used. |
Ken Dyck | 28ebde5 | 2011-04-24 10:04:59 +0000 | [diff] [blame] | 1084 | if (!AI.FieldByteOffset.isZero()) { |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1085 | Ptr = EmitCastToVoidPtr(Ptr); |
Ken Dyck | 28ebde5 | 2011-04-24 10:04:59 +0000 | [diff] [blame] | 1086 | Ptr = Builder.CreateConstGEP1_32(Ptr, AI.FieldByteOffset.getQuantity(), |
| 1087 | "bf.field.offs"); |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1088 | } |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 1089 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1090 | // Cast to the access type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1091 | llvm::Type *AccessLTy = |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1092 | llvm::Type::getIntNTy(getLLVMContext(), AI.AccessWidth); |
| 1093 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1094 | llvm::Type *PTy = AccessLTy->getPointerTo(addressSpace); |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1095 | Ptr = Builder.CreateBitCast(Ptr, PTy); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1096 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1097 | // Extract the piece of the bit-field value to write in this access, limited |
| 1098 | // to the values that are part of this access. |
| 1099 | llvm::Value *Val = SrcVal; |
| 1100 | if (AI.TargetBitOffset) |
| 1101 | Val = Builder.CreateLShr(Val, AI.TargetBitOffset); |
| 1102 | Val = Builder.CreateAnd(Val, llvm::APInt::getLowBitsSet(ResSizeInBits, |
| 1103 | AI.TargetBitWidth)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1104 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1105 | // Extend or truncate to the access size. |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1106 | if (ResSizeInBits < AI.AccessWidth) |
| 1107 | Val = Builder.CreateZExt(Val, AccessLTy); |
| 1108 | else if (ResSizeInBits > AI.AccessWidth) |
| 1109 | Val = Builder.CreateTrunc(Val, AccessLTy); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1110 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1111 | // Shift into the position in memory. |
| 1112 | if (AI.FieldBitStart) |
| 1113 | Val = Builder.CreateShl(Val, AI.FieldBitStart); |
| 1114 | |
| 1115 | // If necessary, load and OR in bits that are outside of the bit-field. |
| 1116 | if (AI.TargetBitWidth != AI.AccessWidth) { |
| 1117 | llvm::LoadInst *Load = Builder.CreateLoad(Ptr, Dst.isVolatileQualified()); |
Ken Dyck | b9e6b2c | 2011-04-24 10:13:17 +0000 | [diff] [blame] | 1118 | if (!AI.AccessAlignment.isZero()) |
| 1119 | Load->setAlignment(AI.AccessAlignment.getQuantity()); |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1120 | |
| 1121 | // Compute the mask for zeroing the bits that are part of the bit-field. |
| 1122 | llvm::APInt InvMask = |
| 1123 | ~llvm::APInt::getBitsSet(AI.AccessWidth, AI.FieldBitStart, |
| 1124 | AI.FieldBitStart + AI.TargetBitWidth); |
| 1125 | |
| 1126 | // Apply the mask and OR in to the value to write. |
| 1127 | Val = Builder.CreateOr(Builder.CreateAnd(Load, InvMask), Val); |
| 1128 | } |
| 1129 | |
| 1130 | // Write the value. |
| 1131 | llvm::StoreInst *Store = Builder.CreateStore(Val, Ptr, |
| 1132 | Dst.isVolatileQualified()); |
Ken Dyck | b9e6b2c | 2011-04-24 10:13:17 +0000 | [diff] [blame] | 1133 | if (!AI.AccessAlignment.isZero()) |
| 1134 | Store->setAlignment(AI.AccessAlignment.getQuantity()); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 1135 | } |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 1136 | } |
| 1137 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 1138 | void CodeGenFunction::EmitStoreThroughExtVectorComponentLValue(RValue Src, |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1139 | LValue Dst) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 1140 | // This access turns into a read/modify/write of the vector. Load the input |
| 1141 | // value now. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1142 | llvm::Value *Vec = Builder.CreateLoad(Dst.getExtVectorAddr(), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1143 | Dst.isVolatileQualified()); |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1144 | const llvm::Constant *Elts = Dst.getExtVectorElts(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1145 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 1146 | llvm::Value *SrcVal = Src.getScalarVal(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1147 | |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1148 | if (const VectorType *VTy = Dst.getType()->getAs<VectorType>()) { |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 1149 | unsigned NumSrcElts = VTy->getNumElements(); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1150 | unsigned NumDstElts = |
| 1151 | cast<llvm::VectorType>(Vec->getType())->getNumElements(); |
| 1152 | if (NumDstElts == NumSrcElts) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1153 | // Use shuffle vector is the src and destination are the same number of |
| 1154 | // elements and restore the vector mask since it is on the side it will be |
| 1155 | // stored. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1156 | SmallVector<llvm::Constant*, 4> Mask(NumDstElts); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1157 | for (unsigned i = 0; i != NumSrcElts; ++i) { |
| 1158 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 1159 | Mask[InIdx] = llvm::ConstantInt::get(Int32Ty, i); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1160 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1161 | |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1162 | llvm::Value *MaskV = llvm::ConstantVector::get(Mask); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1163 | Vec = Builder.CreateShuffleVector(SrcVal, |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 1164 | llvm::UndefValue::get(Vec->getType()), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1165 | MaskV); |
Mike Stump | b3589f4 | 2009-07-30 22:28:39 +0000 | [diff] [blame] | 1166 | } else if (NumDstElts > NumSrcElts) { |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1167 | // Extended the source vector to the same length and then shuffle it |
| 1168 | // into the destination. |
| 1169 | // FIXME: since we're shuffling with undef, can we just use the indices |
| 1170 | // into that? This could be simpler. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1171 | SmallVector<llvm::Constant*, 4> ExtMask; |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1172 | unsigned i; |
| 1173 | for (i = 0; i != NumSrcElts; ++i) |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1174 | ExtMask.push_back(llvm::ConstantInt::get(Int32Ty, i)); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1175 | for (; i != NumDstElts; ++i) |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1176 | ExtMask.push_back(llvm::UndefValue::get(Int32Ty)); |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1177 | llvm::Value *ExtMaskV = llvm::ConstantVector::get(ExtMask); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1178 | llvm::Value *ExtSrcVal = |
Daniel Dunbar | bb76773 | 2009-02-17 18:31:04 +0000 | [diff] [blame] | 1179 | Builder.CreateShuffleVector(SrcVal, |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 1180 | llvm::UndefValue::get(SrcVal->getType()), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1181 | ExtMaskV); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1182 | // build identity |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1183 | SmallVector<llvm::Constant*, 4> Mask; |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1184 | for (unsigned i = 0; i != NumDstElts; ++i) |
| 1185 | Mask.push_back(llvm::ConstantInt::get(Int32Ty, i)); |
| 1186 | |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1187 | // modify when what gets shuffled in |
| 1188 | for (unsigned i = 0; i != NumSrcElts; ++i) { |
| 1189 | unsigned Idx = getAccessedFieldNo(i, Elts); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1190 | Mask[Idx] = llvm::ConstantInt::get(Int32Ty, i+NumDstElts); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1191 | } |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1192 | llvm::Value *MaskV = llvm::ConstantVector::get(Mask); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1193 | Vec = Builder.CreateShuffleVector(Vec, ExtSrcVal, MaskV); |
Mike Stump | b3589f4 | 2009-07-30 22:28:39 +0000 | [diff] [blame] | 1194 | } else { |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1195 | // We should never shorten the vector |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1196 | llvm_unreachable("unexpected shorten vector length"); |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 1197 | } |
| 1198 | } else { |
| 1199 | // If the Src is a scalar (not a vector) it must be updating one element. |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 1200 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1201 | llvm::Value *Elt = llvm::ConstantInt::get(Int32Ty, InIdx); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1202 | Vec = Builder.CreateInsertElement(Vec, SrcVal, Elt); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 1203 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1204 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1205 | Builder.CreateStore(Vec, Dst.getExtVectorAddr(), Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 1206 | } |
| 1207 | |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1208 | // setObjCGCLValueClass - sets class of he lvalue for the purpose of |
| 1209 | // generating write-barries API. It is currently a global, ivar, |
| 1210 | // or neither. |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1211 | static void setObjCGCLValueClass(const ASTContext &Ctx, const Expr *E, |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1212 | LValue &LV, |
| 1213 | bool IsMemberAccess=false) { |
Douglas Gregor | e289d81 | 2011-09-13 17:21:33 +0000 | [diff] [blame] | 1214 | if (Ctx.getLangOptions().getGC() == LangOptions::NonGC) |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1215 | return; |
| 1216 | |
Fariborz Jahanian | dbf3cfd | 2009-09-16 23:11:23 +0000 | [diff] [blame] | 1217 | if (isa<ObjCIvarRefExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1218 | QualType ExpTy = E->getType(); |
| 1219 | if (IsMemberAccess && ExpTy->isPointerType()) { |
| 1220 | // If ivar is a structure pointer, assigning to field of |
| 1221 | // this struct follows gcc's behavior and makes it a non-ivar |
| 1222 | // writer-barrier conservatively. |
| 1223 | ExpTy = ExpTy->getAs<PointerType>()->getPointeeType(); |
| 1224 | if (ExpTy->isRecordType()) { |
| 1225 | LV.setObjCIvar(false); |
| 1226 | return; |
| 1227 | } |
| 1228 | } |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1229 | LV.setObjCIvar(true); |
Fariborz Jahanian | 6c7a1f3 | 2009-09-24 22:25:38 +0000 | [diff] [blame] | 1230 | ObjCIvarRefExpr *Exp = cast<ObjCIvarRefExpr>(const_cast<Expr*>(E)); |
| 1231 | LV.setBaseIvarExp(Exp->getBase()); |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1232 | LV.setObjCArray(E->getType()->isArrayType()); |
Fariborz Jahanian | dbf3cfd | 2009-09-16 23:11:23 +0000 | [diff] [blame] | 1233 | return; |
| 1234 | } |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1235 | |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1236 | if (const DeclRefExpr *Exp = dyn_cast<DeclRefExpr>(E)) { |
| 1237 | if (const VarDecl *VD = dyn_cast<VarDecl>(Exp->getDecl())) { |
John McCall | b6bbcc9 | 2010-10-15 04:57:14 +0000 | [diff] [blame] | 1238 | if (VD->hasGlobalStorage()) { |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1239 | LV.setGlobalObjCRef(true); |
| 1240 | LV.setThreadLocalRef(VD->isThreadSpecified()); |
Fariborz Jahanian | 021a7a6 | 2010-07-20 20:30:03 +0000 | [diff] [blame] | 1241 | } |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1242 | } |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1243 | LV.setObjCArray(E->getType()->isArrayType()); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1244 | return; |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1245 | } |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1246 | |
| 1247 | if (const UnaryOperator *Exp = dyn_cast<UnaryOperator>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1248 | setObjCGCLValueClass(Ctx, Exp->getSubExpr(), LV, IsMemberAccess); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1249 | return; |
| 1250 | } |
| 1251 | |
| 1252 | if (const ParenExpr *Exp = dyn_cast<ParenExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1253 | setObjCGCLValueClass(Ctx, Exp->getSubExpr(), LV, IsMemberAccess); |
Fariborz Jahanian | 75b08f1 | 2009-09-30 17:10:29 +0000 | [diff] [blame] | 1254 | if (LV.isObjCIvar()) { |
| 1255 | // If cast is to a structure pointer, follow gcc's behavior and make it |
| 1256 | // a non-ivar write-barrier. |
| 1257 | QualType ExpTy = E->getType(); |
| 1258 | if (ExpTy->isPointerType()) |
| 1259 | ExpTy = ExpTy->getAs<PointerType>()->getPointeeType(); |
| 1260 | if (ExpTy->isRecordType()) |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1261 | LV.setObjCIvar(false); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1262 | } |
| 1263 | return; |
Fariborz Jahanian | 75b08f1 | 2009-09-30 17:10:29 +0000 | [diff] [blame] | 1264 | } |
Peter Collingbourne | f111d93 | 2011-04-15 00:35:48 +0000 | [diff] [blame] | 1265 | |
| 1266 | if (const GenericSelectionExpr *Exp = dyn_cast<GenericSelectionExpr>(E)) { |
| 1267 | setObjCGCLValueClass(Ctx, Exp->getResultExpr(), LV); |
| 1268 | return; |
| 1269 | } |
| 1270 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1271 | if (const ImplicitCastExpr *Exp = dyn_cast<ImplicitCastExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1272 | setObjCGCLValueClass(Ctx, Exp->getSubExpr(), LV, IsMemberAccess); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1273 | return; |
| 1274 | } |
| 1275 | |
| 1276 | if (const CStyleCastExpr *Exp = dyn_cast<CStyleCastExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1277 | setObjCGCLValueClass(Ctx, Exp->getSubExpr(), LV, IsMemberAccess); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1278 | return; |
| 1279 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1280 | |
| 1281 | if (const ObjCBridgedCastExpr *Exp = dyn_cast<ObjCBridgedCastExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1282 | setObjCGCLValueClass(Ctx, Exp->getSubExpr(), LV, IsMemberAccess); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1283 | return; |
| 1284 | } |
| 1285 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1286 | if (const ArraySubscriptExpr *Exp = dyn_cast<ArraySubscriptExpr>(E)) { |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1287 | setObjCGCLValueClass(Ctx, Exp->getBase(), LV); |
Fariborz Jahanian | fd02ed7 | 2009-09-21 18:54:29 +0000 | [diff] [blame] | 1288 | if (LV.isObjCIvar() && !LV.isObjCArray()) |
Fariborz Jahanian | 1c1afc4 | 2009-09-18 00:04:00 +0000 | [diff] [blame] | 1289 | // Using array syntax to assigning to what an ivar points to is not |
| 1290 | // same as assigning to the ivar itself. {id *Names;} Names[i] = 0; |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1291 | LV.setObjCIvar(false); |
Fariborz Jahanian | fd02ed7 | 2009-09-21 18:54:29 +0000 | [diff] [blame] | 1292 | else if (LV.isGlobalObjCRef() && !LV.isObjCArray()) |
| 1293 | // Using array syntax to assigning to what global points to is not |
| 1294 | // same as assigning to the global itself. {id *G;} G[i] = 0; |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1295 | LV.setGlobalObjCRef(false); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1296 | return; |
Fariborz Jahanian | 1c1afc4 | 2009-09-18 00:04:00 +0000 | [diff] [blame] | 1297 | } |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1298 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1299 | if (const MemberExpr *Exp = dyn_cast<MemberExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1300 | setObjCGCLValueClass(Ctx, Exp->getBase(), LV, true); |
Fariborz Jahanian | 1c1afc4 | 2009-09-18 00:04:00 +0000 | [diff] [blame] | 1301 | // We don't know if member is an 'ivar', but this flag is looked at |
| 1302 | // only in the context of LV.isObjCIvar(). |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1303 | LV.setObjCArray(E->getType()->isArrayType()); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1304 | return; |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1305 | } |
| 1306 | } |
| 1307 | |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1308 | static llvm::Value * |
Chandler Carruth | a98742c | 2011-07-12 08:58:26 +0000 | [diff] [blame] | 1309 | EmitBitCastOfLValueToProperType(CodeGenFunction &CGF, |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1310 | llvm::Value *V, llvm::Type *IRType, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1311 | StringRef Name = StringRef()) { |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1312 | unsigned AS = cast<llvm::PointerType>(V->getType())->getAddressSpace(); |
Chandler Carruth | a98742c | 2011-07-12 08:58:26 +0000 | [diff] [blame] | 1313 | return CGF.Builder.CreateBitCast(V, IRType->getPointerTo(AS), Name); |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1314 | } |
| 1315 | |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1316 | static LValue EmitGlobalVarDeclLValue(CodeGenFunction &CGF, |
| 1317 | const Expr *E, const VarDecl *VD) { |
Daniel Dunbar | d2113f2 | 2009-11-08 09:46:46 +0000 | [diff] [blame] | 1318 | assert((VD->hasExternalStorage() || VD->isFileVarDecl()) && |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1319 | "Var decl must have external storage or be a file var decl!"); |
| 1320 | |
| 1321 | llvm::Value *V = CGF.CGM.GetAddrOfGlobalVar(VD); |
Eli Friedman | 2f77b3d | 2011-11-16 00:42:57 +0000 | [diff] [blame] | 1322 | llvm::Type *RealVarTy = CGF.getTypes().ConvertTypeForMem(VD->getType()); |
| 1323 | V = EmitBitCastOfLValueToProperType(CGF, V, RealVarTy); |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1324 | unsigned Alignment = CGF.getContext().getDeclAlign(VD).getQuantity(); |
Eli Friedman | 2f77b3d | 2011-11-16 00:42:57 +0000 | [diff] [blame] | 1325 | QualType T = E->getType(); |
| 1326 | LValue LV; |
| 1327 | if (VD->getType()->isReferenceType()) { |
| 1328 | llvm::LoadInst *LI = CGF.Builder.CreateLoad(V); |
| 1329 | LI->setAlignment(Alignment); |
| 1330 | V = LI; |
| 1331 | LV = CGF.MakeNaturalAlignAddrLValue(V, T); |
| 1332 | } else { |
| 1333 | LV = CGF.MakeAddrLValue(V, E->getType(), Alignment); |
| 1334 | } |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1335 | setObjCGCLValueClass(CGF.getContext(), E, LV); |
| 1336 | return LV; |
| 1337 | } |
| 1338 | |
Eli Friedman | 9a14630 | 2009-11-26 06:08:14 +0000 | [diff] [blame] | 1339 | static LValue EmitFunctionDeclLValue(CodeGenFunction &CGF, |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 1340 | const Expr *E, const FunctionDecl *FD) { |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1341 | llvm::Value *V = CGF.CGM.GetAddrOfFunction(FD); |
Eli Friedman | 9a14630 | 2009-11-26 06:08:14 +0000 | [diff] [blame] | 1342 | if (!FD->hasPrototype()) { |
| 1343 | if (const FunctionProtoType *Proto = |
| 1344 | FD->getType()->getAs<FunctionProtoType>()) { |
| 1345 | // Ugly case: for a K&R-style definition, the type of the definition |
| 1346 | // isn't the same as the type of a use. Correct for this with a |
| 1347 | // bitcast. |
| 1348 | QualType NoProtoType = |
| 1349 | CGF.getContext().getFunctionNoProtoType(Proto->getResultType()); |
| 1350 | NoProtoType = CGF.getContext().getPointerType(NoProtoType); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1351 | V = CGF.Builder.CreateBitCast(V, CGF.ConvertType(NoProtoType)); |
Eli Friedman | 9a14630 | 2009-11-26 06:08:14 +0000 | [diff] [blame] | 1352 | } |
| 1353 | } |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1354 | unsigned Alignment = CGF.getContext().getDeclAlign(FD).getQuantity(); |
| 1355 | return CGF.MakeAddrLValue(V, E->getType(), Alignment); |
Eli Friedman | 9a14630 | 2009-11-26 06:08:14 +0000 | [diff] [blame] | 1356 | } |
| 1357 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1358 | LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) { |
Anders Carlsson | 1e74c4f | 2009-11-07 22:53:10 +0000 | [diff] [blame] | 1359 | const NamedDecl *ND = E->getDecl(); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1360 | unsigned Alignment = getContext().getDeclAlign(ND).getQuantity(); |
Eli Friedman | 2f77b3d | 2011-11-16 00:42:57 +0000 | [diff] [blame] | 1361 | QualType T = E->getType(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1362 | |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1363 | if (ND->hasAttr<WeakRefAttr>()) { |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1364 | const ValueDecl *VD = cast<ValueDecl>(ND); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1365 | llvm::Constant *Aliasee = CGM.GetWeakRefReference(VD); |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1366 | return MakeAddrLValue(Aliasee, E->getType(), Alignment); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1367 | } |
| 1368 | |
Anders Carlsson | 1e74c4f | 2009-11-07 22:53:10 +0000 | [diff] [blame] | 1369 | if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) { |
Anders Carlsson | 1e74c4f | 2009-11-07 22:53:10 +0000 | [diff] [blame] | 1370 | |
| 1371 | // Check if this is a global variable. |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1372 | if (VD->hasExternalStorage() || VD->isFileVarDecl()) |
| 1373 | return EmitGlobalVarDeclLValue(*this, E, VD); |
Anders Carlsson | 0bc7049 | 2009-11-07 22:46:42 +0000 | [diff] [blame] | 1374 | |
Fariborz Jahanian | 75f91d6 | 2010-11-19 18:17:09 +0000 | [diff] [blame] | 1375 | bool NonGCable = VD->hasLocalStorage() && |
| 1376 | !VD->getType()->isReferenceType() && |
| 1377 | !VD->hasAttr<BlocksAttr>(); |
Anders Carlsson | 0bc7049 | 2009-11-07 22:46:42 +0000 | [diff] [blame] | 1378 | |
| 1379 | llvm::Value *V = LocalDeclMap[VD]; |
Fariborz Jahanian | 0934914 | 2010-09-07 23:26:17 +0000 | [diff] [blame] | 1380 | if (!V && VD->isStaticLocal()) |
Fariborz Jahanian | 63326a5 | 2010-04-19 18:15:02 +0000 | [diff] [blame] | 1381 | V = CGM.getStaticLocalDeclAddress(VD); |
Anders Carlsson | 0bc7049 | 2009-11-07 22:46:42 +0000 | [diff] [blame] | 1382 | assert(V && "DeclRefExpr not entered in LocalDeclMap?"); |
| 1383 | |
Fariborz Jahanian | 52a80e1 | 2011-01-26 23:08:27 +0000 | [diff] [blame] | 1384 | if (VD->hasAttr<BlocksAttr>()) |
| 1385 | V = BuildBlockByrefAddress(V, VD); |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1386 | |
Eli Friedman | 2f77b3d | 2011-11-16 00:42:57 +0000 | [diff] [blame] | 1387 | LValue LV; |
| 1388 | if (VD->getType()->isReferenceType()) { |
| 1389 | llvm::LoadInst *LI = Builder.CreateLoad(V); |
| 1390 | LI->setAlignment(Alignment); |
| 1391 | V = LI; |
| 1392 | LV = MakeNaturalAlignAddrLValue(V, T); |
| 1393 | } else { |
| 1394 | LV = MakeAddrLValue(V, T, Alignment); |
| 1395 | } |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1396 | |
Fariborz Jahanian | 75f91d6 | 2010-11-19 18:17:09 +0000 | [diff] [blame] | 1397 | if (NonGCable) { |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1398 | LV.getQuals().removeObjCGCAttr(); |
Daniel Dunbar | ea61917 | 2010-08-21 03:22:38 +0000 | [diff] [blame] | 1399 | LV.setNonGC(true); |
| 1400 | } |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1401 | setObjCGCLValueClass(getContext(), E, LV); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 1402 | return LV; |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1403 | } |
John McCall | 5808ce4 | 2011-02-03 08:15:49 +0000 | [diff] [blame] | 1404 | |
| 1405 | if (const FunctionDecl *fn = dyn_cast<FunctionDecl>(ND)) |
| 1406 | return EmitFunctionDeclLValue(*this, E, fn); |
| 1407 | |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1408 | llvm_unreachable("Unhandled DeclRefExpr"); |
Anders Carlsson | 1e74c4f | 2009-11-07 22:53:10 +0000 | [diff] [blame] | 1409 | |
| 1410 | // an invalid LValue, but the assert will |
| 1411 | // ensure that this point is never reached. |
Chris Lattner | b1776cb | 2007-09-16 19:23:47 +0000 | [diff] [blame] | 1412 | return LValue(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1413 | } |
| 1414 | |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 1415 | LValue CodeGenFunction::EmitBlockDeclRefLValue(const BlockDeclRefExpr *E) { |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1416 | unsigned Alignment = |
Fariborz Jahanian | c637d73 | 2011-11-02 22:53:43 +0000 | [diff] [blame] | 1417 | getContext().getDeclAlign(E->getDecl()).getQuantity(); |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1418 | return MakeAddrLValue(GetAddrOfBlockDecl(E), E->getType(), Alignment); |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 1419 | } |
| 1420 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1421 | LValue CodeGenFunction::EmitUnaryOpLValue(const UnaryOperator *E) { |
| 1422 | // __extension__ doesn't affect lvalue-ness. |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1423 | if (E->getOpcode() == UO_Extension) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1424 | return EmitLValue(E->getSubExpr()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1425 | |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 1426 | QualType ExprTy = getContext().getCanonicalType(E->getSubExpr()->getType()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 1427 | switch (E->getOpcode()) { |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1428 | default: llvm_unreachable("Unknown unary operator lvalue!"); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1429 | case UO_Deref: { |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1430 | QualType T = E->getSubExpr()->getType()->getPointeeType(); |
| 1431 | assert(!T.isNull() && "CodeGenFunction::EmitUnaryOpLValue: Illegal type"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1432 | |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1433 | LValue LV = MakeAddrLValue(EmitScalarExpr(E->getSubExpr()), T); |
| 1434 | LV.getQuals().setAddressSpace(ExprTy.getAddressSpace()); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1435 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1436 | // We should not generate __weak write barrier on indirect reference |
| 1437 | // of a pointer to object; as in void foo (__weak id *param); *param = 0; |
| 1438 | // But, we continue to generate __strong write barrier on indirect write |
| 1439 | // into a pointer to object. |
| 1440 | if (getContext().getLangOptions().ObjC1 && |
Douglas Gregor | e289d81 | 2011-09-13 17:21:33 +0000 | [diff] [blame] | 1441 | getContext().getLangOptions().getGC() != LangOptions::NonGC && |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1442 | LV.isObjCWeak()) |
Daniel Dunbar | ea61917 | 2010-08-21 03:22:38 +0000 | [diff] [blame] | 1443 | LV.setNonGC(!E->isOBJCGCCandidate(getContext())); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1444 | return LV; |
| 1445 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1446 | case UO_Real: |
| 1447 | case UO_Imag: { |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 1448 | LValue LV = EmitLValue(E->getSubExpr()); |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 1449 | assert(LV.isSimple() && "real/imag on non-ordinary l-value"); |
| 1450 | llvm::Value *Addr = LV.getAddress(); |
| 1451 | |
| 1452 | // real and imag are valid on scalars. This is a faster way of |
| 1453 | // testing that. |
| 1454 | if (!cast<llvm::PointerType>(Addr->getType()) |
| 1455 | ->getElementType()->isStructTy()) { |
| 1456 | assert(E->getSubExpr()->getType()->isArithmeticType()); |
| 1457 | return LV; |
| 1458 | } |
| 1459 | |
| 1460 | assert(E->getSubExpr()->getType()->isAnyComplexType()); |
| 1461 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1462 | unsigned Idx = E->getOpcode() == UO_Imag; |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 1463 | return MakeAddrLValue(Builder.CreateStructGEP(LV.getAddress(), |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 1464 | Idx, "idx"), |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 1465 | ExprTy); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 1466 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1467 | case UO_PreInc: |
| 1468 | case UO_PreDec: { |
Chris Lattner | 197a338 | 2010-01-09 21:44:40 +0000 | [diff] [blame] | 1469 | LValue LV = EmitLValue(E->getSubExpr()); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1470 | bool isInc = E->getOpcode() == UO_PreInc; |
Chris Lattner | 197a338 | 2010-01-09 21:44:40 +0000 | [diff] [blame] | 1471 | |
| 1472 | if (E->getType()->isAnyComplexType()) |
| 1473 | EmitComplexPrePostIncDec(E, LV, isInc, true/*isPre*/); |
| 1474 | else |
| 1475 | EmitScalarPrePostIncDec(E, LV, isInc, true/*isPre*/); |
| 1476 | return LV; |
| 1477 | } |
Eli Friedman | e401cd5 | 2009-11-09 04:20:47 +0000 | [diff] [blame] | 1478 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1479 | } |
| 1480 | |
| 1481 | LValue CodeGenFunction::EmitStringLiteralLValue(const StringLiteral *E) { |
Daniel Dunbar | 79c3928 | 2010-08-21 03:15:20 +0000 | [diff] [blame] | 1482 | return MakeAddrLValue(CGM.GetAddrOfConstantStringFromLiteral(E), |
| 1483 | E->getType()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1484 | } |
| 1485 | |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1486 | LValue CodeGenFunction::EmitObjCEncodeExprLValue(const ObjCEncodeExpr *E) { |
Daniel Dunbar | 79c3928 | 2010-08-21 03:15:20 +0000 | [diff] [blame] | 1487 | return MakeAddrLValue(CGM.GetAddrOfConstantStringFromObjCEncode(E), |
| 1488 | E->getType()); |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1489 | } |
| 1490 | |
| 1491 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1492 | LValue CodeGenFunction::EmitPredefinedLValue(const PredefinedExpr *E) { |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 1493 | switch (E->getIdentType()) { |
| 1494 | default: |
| 1495 | return EmitUnsupportedLValue(E, "predefined expression"); |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1496 | |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 1497 | case PredefinedExpr::Func: |
| 1498 | case PredefinedExpr::Function: |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1499 | case PredefinedExpr::PrettyFunction: { |
| 1500 | unsigned Type = E->getIdentType(); |
| 1501 | std::string GlobalVarName; |
| 1502 | |
| 1503 | switch (Type) { |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1504 | default: llvm_unreachable("Invalid type"); |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1505 | case PredefinedExpr::Func: |
| 1506 | GlobalVarName = "__func__."; |
| 1507 | break; |
| 1508 | case PredefinedExpr::Function: |
| 1509 | GlobalVarName = "__FUNCTION__."; |
| 1510 | break; |
| 1511 | case PredefinedExpr::PrettyFunction: |
| 1512 | GlobalVarName = "__PRETTY_FUNCTION__."; |
| 1513 | break; |
| 1514 | } |
| 1515 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1516 | StringRef FnName = CurFn->getName(); |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1517 | if (FnName.startswith("\01")) |
| 1518 | FnName = FnName.substr(1); |
| 1519 | GlobalVarName += FnName; |
| 1520 | |
| 1521 | const Decl *CurDecl = CurCodeDecl; |
| 1522 | if (CurDecl == 0) |
| 1523 | CurDecl = getContext().getTranslationUnitDecl(); |
| 1524 | |
| 1525 | std::string FunctionName = |
John McCall | 6b5a61b | 2011-02-07 10:33:21 +0000 | [diff] [blame] | 1526 | (isa<BlockDecl>(CurDecl) |
| 1527 | ? FnName.str() |
| 1528 | : PredefinedExpr::ComputeName((PredefinedExpr::IdentType)Type, CurDecl)); |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1529 | |
| 1530 | llvm::Constant *C = |
| 1531 | CGM.GetAddrOfConstantCString(FunctionName, GlobalVarName.c_str()); |
Daniel Dunbar | 79c3928 | 2010-08-21 03:15:20 +0000 | [diff] [blame] | 1532 | return MakeAddrLValue(C, E->getType()); |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1533 | } |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 1534 | } |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 1535 | } |
| 1536 | |
Mike Stump | d8af360 | 2009-12-15 01:22:35 +0000 | [diff] [blame] | 1537 | llvm::BasicBlock *CodeGenFunction::getTrapBB() { |
Mike Stump | 4151344 | 2009-12-15 00:59:40 +0000 | [diff] [blame] | 1538 | const CodeGenOptions &GCO = CGM.getCodeGenOpts(); |
| 1539 | |
| 1540 | // If we are not optimzing, don't collapse all calls to trap in the function |
| 1541 | // to the same call, that way, in the debugger they can see which operation |
Chris Lattner | 6c552c1 | 2010-07-20 20:19:24 +0000 | [diff] [blame] | 1542 | // did in fact fail. If we are optimizing, we collapse all calls to trap down |
Mike Stump | 4151344 | 2009-12-15 00:59:40 +0000 | [diff] [blame] | 1543 | // to just one per function to save on codesize. |
Chris Lattner | 6c552c1 | 2010-07-20 20:19:24 +0000 | [diff] [blame] | 1544 | if (GCO.OptimizationLevel && TrapBB) |
Mike Stump | 15037ca | 2009-12-15 00:35:12 +0000 | [diff] [blame] | 1545 | return TrapBB; |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1546 | |
| 1547 | llvm::BasicBlock *Cont = 0; |
| 1548 | if (HaveInsertPoint()) { |
| 1549 | Cont = createBasicBlock("cont"); |
| 1550 | EmitBranch(Cont); |
| 1551 | } |
Mike Stump | 15037ca | 2009-12-15 00:35:12 +0000 | [diff] [blame] | 1552 | TrapBB = createBasicBlock("trap"); |
| 1553 | EmitBlock(TrapBB); |
| 1554 | |
Benjamin Kramer | 8dd55a3 | 2011-07-14 17:45:50 +0000 | [diff] [blame] | 1555 | llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::trap); |
Mike Stump | 15037ca | 2009-12-15 00:35:12 +0000 | [diff] [blame] | 1556 | llvm::CallInst *TrapCall = Builder.CreateCall(F); |
| 1557 | TrapCall->setDoesNotReturn(); |
| 1558 | TrapCall->setDoesNotThrow(); |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1559 | Builder.CreateUnreachable(); |
| 1560 | |
| 1561 | if (Cont) |
| 1562 | EmitBlock(Cont); |
Mike Stump | 15037ca | 2009-12-15 00:35:12 +0000 | [diff] [blame] | 1563 | return TrapBB; |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1564 | } |
| 1565 | |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1566 | /// isSimpleArrayDecayOperand - If the specified expr is a simple decay from an |
| 1567 | /// array to pointer, return the array subexpression. |
| 1568 | static const Expr *isSimpleArrayDecayOperand(const Expr *E) { |
| 1569 | // If this isn't just an array->pointer decay, bail out. |
| 1570 | const CastExpr *CE = dyn_cast<CastExpr>(E); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1571 | if (CE == 0 || CE->getCastKind() != CK_ArrayToPointerDecay) |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1572 | return 0; |
| 1573 | |
| 1574 | // If this is a decay from variable width array, bail out. |
| 1575 | const Expr *SubExpr = CE->getSubExpr(); |
| 1576 | if (SubExpr->getType()->isVariableArrayType()) |
| 1577 | return 0; |
| 1578 | |
| 1579 | return SubExpr; |
| 1580 | } |
| 1581 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1582 | LValue CodeGenFunction::EmitArraySubscriptExpr(const ArraySubscriptExpr *E) { |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 1583 | // The index must always be an integer, which is not an aggregate. Emit it. |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1584 | llvm::Value *Idx = EmitScalarExpr(E->getIdx()); |
Eli Friedman | 61d004a | 2009-06-06 19:09:26 +0000 | [diff] [blame] | 1585 | QualType IdxTy = E->getIdx()->getType(); |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 1586 | bool IdxSigned = IdxTy->isSignedIntegerOrEnumerationType(); |
Eli Friedman | 61d004a | 2009-06-06 19:09:26 +0000 | [diff] [blame] | 1587 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1588 | // If the base is a vector type, then we are forming a vector element lvalue |
| 1589 | // with this subscript. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1590 | if (E->getBase()->getType()->isVectorType()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1591 | // Emit the vector as an lvalue to get its address. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1592 | LValue LHS = EmitLValue(E->getBase()); |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 1593 | assert(LHS.isSimple() && "Can only subscript lvalue vectors here!"); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1594 | Idx = Builder.CreateIntCast(Idx, Int32Ty, IdxSigned, "vidx"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1595 | return LValue::MakeVectorElt(LHS.getAddress(), Idx, |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1596 | E->getBase()->getType()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1597 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1598 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 1599 | // Extend or truncate the index type to 32 or 64-bits. |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1600 | if (Idx->getType() != IntPtrTy) |
| 1601 | Idx = Builder.CreateIntCast(Idx, IntPtrTy, IdxSigned, "idxprom"); |
Chris Lattner | a4d94ab | 2010-06-26 22:40:46 +0000 | [diff] [blame] | 1602 | |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 1603 | // FIXME: As llvm implements the object size checking, this can come out. |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1604 | if (CatchUndefined) { |
Chris Lattner | a4d94ab | 2010-06-26 22:40:46 +0000 | [diff] [blame] | 1605 | if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E->getBase())){ |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1606 | if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr())) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1607 | if (ICE->getCastKind() == CK_ArrayToPointerDecay) { |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1608 | if (const ConstantArrayType *CAT |
| 1609 | = getContext().getAsConstantArrayType(DRE->getType())) { |
| 1610 | llvm::APInt Size = CAT->getSize(); |
| 1611 | llvm::BasicBlock *Cont = createBasicBlock("cont"); |
Mike Stump | 750c85e | 2009-12-14 22:14:31 +0000 | [diff] [blame] | 1612 | Builder.CreateCondBr(Builder.CreateICmpULE(Idx, |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1613 | llvm::ConstantInt::get(Idx->getType(), Size)), |
Mike Stump | 15037ca | 2009-12-15 00:35:12 +0000 | [diff] [blame] | 1614 | Cont, getTrapBB()); |
Mike Stump | 96a063a | 2009-12-14 20:52:00 +0000 | [diff] [blame] | 1615 | EmitBlock(Cont); |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1616 | } |
| 1617 | } |
| 1618 | } |
| 1619 | } |
| 1620 | } |
| 1621 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1622 | // We know that the pointer points to a type of the correct size, unless the |
| 1623 | // size is a VLA or Objective-C interface. |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 1624 | llvm::Value *Address = 0; |
Daniel Dunbar | d553408 | 2011-04-01 00:49:43 +0000 | [diff] [blame] | 1625 | unsigned ArrayAlignment = 0; |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1626 | if (const VariableArrayType *vla = |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 1627 | getContext().getAsVariableArrayType(E->getType())) { |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1628 | // The base must be a pointer, which is not an aggregate. Emit |
| 1629 | // it. It needs to be emitted first in case it's what captures |
| 1630 | // the VLA bounds. |
| 1631 | Address = EmitScalarExpr(E->getBase()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1632 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1633 | // The element count here is the total number of non-VLA elements. |
| 1634 | llvm::Value *numElements = getVLASize(vla).first; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1635 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 1636 | // Effectively, the multiply by the VLA size is part of the GEP. |
| 1637 | // GEP indexes are signed, and scaling an index isn't permitted to |
| 1638 | // signed-overflow, so we use the same semantics for our explicit |
| 1639 | // multiply. We suppress this if overflow is not undefined behavior. |
| 1640 | if (getLangOptions().isSignedOverflowDefined()) { |
| 1641 | Idx = Builder.CreateMul(Idx, numElements); |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1642 | Address = Builder.CreateGEP(Address, Idx, "arrayidx"); |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 1643 | } else { |
| 1644 | Idx = Builder.CreateNSWMul(Idx, numElements); |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1645 | Address = Builder.CreateInBoundsGEP(Address, Idx, "arrayidx"); |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 1646 | } |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1647 | } else if (const ObjCObjectType *OIT = E->getType()->getAs<ObjCObjectType>()){ |
| 1648 | // Indexing over an interface, as in "NSString *P; P[4];" |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1649 | llvm::Value *InterfaceSize = |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 1650 | llvm::ConstantInt::get(Idx->getType(), |
Ken Dyck | 199c3d6 | 2010-01-11 17:06:35 +0000 | [diff] [blame] | 1651 | getContext().getTypeSizeInChars(OIT).getQuantity()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1652 | |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 1653 | Idx = Builder.CreateMul(Idx, InterfaceSize); |
| 1654 | |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1655 | // The base must be a pointer, which is not an aggregate. Emit it. |
| 1656 | llvm::Value *Base = EmitScalarExpr(E->getBase()); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1657 | Address = EmitCastToVoidPtr(Base); |
| 1658 | Address = Builder.CreateGEP(Address, Idx, "arrayidx"); |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 1659 | Address = Builder.CreateBitCast(Address, Base->getType()); |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1660 | } else if (const Expr *Array = isSimpleArrayDecayOperand(E->getBase())) { |
| 1661 | // If this is A[i] where A is an array, the frontend will have decayed the |
| 1662 | // base to be a ArrayToPointerDecay implicit cast. While correct, it is |
| 1663 | // inefficient at -O0 to emit a "gep A, 0, 0" when codegen'ing it, then a |
| 1664 | // "gep x, i" here. Emit one "gep A, 0, i". |
| 1665 | assert(Array->getType()->isArrayType() && |
| 1666 | "Array to pointer decay must have array source type!"); |
Daniel Dunbar | d553408 | 2011-04-01 00:49:43 +0000 | [diff] [blame] | 1667 | LValue ArrayLV = EmitLValue(Array); |
| 1668 | llvm::Value *ArrayPtr = ArrayLV.getAddress(); |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1669 | llvm::Value *Zero = llvm::ConstantInt::get(Int32Ty, 0); |
| 1670 | llvm::Value *Args[] = { Zero, Idx }; |
| 1671 | |
Daniel Dunbar | d553408 | 2011-04-01 00:49:43 +0000 | [diff] [blame] | 1672 | // Propagate the alignment from the array itself to the result. |
| 1673 | ArrayAlignment = ArrayLV.getAlignment(); |
| 1674 | |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1675 | if (getContext().getLangOptions().isSignedOverflowDefined()) |
Jay Foad | 0f6ac7c | 2011-07-22 08:16:57 +0000 | [diff] [blame] | 1676 | Address = Builder.CreateGEP(ArrayPtr, Args, "arrayidx"); |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1677 | else |
Jay Foad | 0f6ac7c | 2011-07-22 08:16:57 +0000 | [diff] [blame] | 1678 | Address = Builder.CreateInBoundsGEP(ArrayPtr, Args, "arrayidx"); |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 1679 | } else { |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1680 | // The base must be a pointer, which is not an aggregate. Emit it. |
| 1681 | llvm::Value *Base = EmitScalarExpr(E->getBase()); |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1682 | if (getContext().getLangOptions().isSignedOverflowDefined()) |
| 1683 | Address = Builder.CreateGEP(Base, Idx, "arrayidx"); |
| 1684 | else |
| 1685 | Address = Builder.CreateInBoundsGEP(Base, Idx, "arrayidx"); |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 1686 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1687 | |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 1688 | QualType T = E->getBase()->getType()->getPointeeType(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1689 | assert(!T.isNull() && |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 1690 | "CodeGenFunction::EmitArraySubscriptExpr(): Illegal base type"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1691 | |
Daniel Dunbar | d553408 | 2011-04-01 00:49:43 +0000 | [diff] [blame] | 1692 | // Limit the alignment to that of the result type. |
| 1693 | if (ArrayAlignment) { |
| 1694 | unsigned Align = getContext().getTypeAlignInChars(T).getQuantity(); |
| 1695 | ArrayAlignment = std::min(Align, ArrayAlignment); |
| 1696 | } |
| 1697 | |
| 1698 | LValue LV = MakeAddrLValue(Address, T, ArrayAlignment); |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1699 | LV.getQuals().setAddressSpace(E->getBase()->getType().getAddressSpace()); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1700 | |
Fariborz Jahanian | 643887a | 2009-02-21 23:37:19 +0000 | [diff] [blame] | 1701 | if (getContext().getLangOptions().ObjC1 && |
Douglas Gregor | e289d81 | 2011-09-13 17:21:33 +0000 | [diff] [blame] | 1702 | getContext().getLangOptions().getGC() != LangOptions::NonGC) { |
Daniel Dunbar | ea61917 | 2010-08-21 03:22:38 +0000 | [diff] [blame] | 1703 | LV.setNonGC(!E->isOBJCGCCandidate(getContext())); |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1704 | setObjCGCLValueClass(getContext(), E, LV); |
| 1705 | } |
Fariborz Jahanian | 643887a | 2009-02-21 23:37:19 +0000 | [diff] [blame] | 1706 | return LV; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1707 | } |
| 1708 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1709 | static |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 1710 | llvm::Constant *GenerateConstantVector(llvm::LLVMContext &VMContext, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1711 | SmallVector<unsigned, 4> &Elts) { |
| 1712 | SmallVector<llvm::Constant*, 4> CElts; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1713 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1714 | llvm::Type *Int32Ty = llvm::Type::getInt32Ty(VMContext); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1715 | for (unsigned i = 0, e = Elts.size(); i != e; ++i) |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 1716 | CElts.push_back(llvm::ConstantInt::get(Int32Ty, Elts[i])); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1717 | |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1718 | return llvm::ConstantVector::get(CElts); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1719 | } |
| 1720 | |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 1721 | LValue CodeGenFunction:: |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 1722 | EmitExtVectorElementExpr(const ExtVectorElementExpr *E) { |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 1723 | // Emit the base vector as an l-value. |
Chris Lattner | 73525de | 2009-02-16 21:11:58 +0000 | [diff] [blame] | 1724 | LValue Base; |
| 1725 | |
| 1726 | // ExtVectorElementExpr's base can either be a vector or pointer to vector. |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1727 | if (E->isArrow()) { |
| 1728 | // If it is a pointer to a vector, emit the address and form an lvalue with |
| 1729 | // it. |
Chris Lattner | 2140e90 | 2009-02-16 22:14:05 +0000 | [diff] [blame] | 1730 | llvm::Value *Ptr = EmitScalarExpr(E->getBase()); |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1731 | const PointerType *PT = E->getBase()->getType()->getAs<PointerType>(); |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1732 | Base = MakeAddrLValue(Ptr, PT->getPointeeType()); |
| 1733 | Base.getQuals().removeObjCGCAttr(); |
John McCall | 7eb0a9e | 2010-11-24 05:12:34 +0000 | [diff] [blame] | 1734 | } else if (E->getBase()->isGLValue()) { |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1735 | // Otherwise, if the base is an lvalue ( as in the case of foo.x.x), |
| 1736 | // emit the base as an lvalue. |
| 1737 | assert(E->getBase()->getType()->isVectorType()); |
| 1738 | Base = EmitLValue(E->getBase()); |
| 1739 | } else { |
| 1740 | // Otherwise, the base is a normal rvalue (as in (V+V).x), emit it as such. |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1741 | assert(E->getBase()->getType()->isVectorType() && |
Daniel Dunbar | 302c3c2 | 2010-01-04 18:02:28 +0000 | [diff] [blame] | 1742 | "Result must be a vector"); |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1743 | llvm::Value *Vec = EmitScalarExpr(E->getBase()); |
| 1744 | |
Chris Lattner | 0ad57fb | 2009-12-23 21:33:41 +0000 | [diff] [blame] | 1745 | // Store the vector to memory (because LValue wants an address). |
Daniel Dunbar | 195337d | 2010-02-09 02:48:28 +0000 | [diff] [blame] | 1746 | llvm::Value *VecMem = CreateMemTemp(E->getBase()->getType()); |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1747 | Builder.CreateStore(Vec, VecMem); |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1748 | Base = MakeAddrLValue(VecMem, E->getBase()->getType()); |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1749 | } |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1750 | |
| 1751 | QualType type = |
| 1752 | E->getType().withCVRQualifiers(Base.getQuals().getCVRQualifiers()); |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1753 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1754 | // Encode the element access list into a vector of unsigned indices. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1755 | SmallVector<unsigned, 4> Indices; |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1756 | E->getEncodedElementAccess(Indices); |
| 1757 | |
| 1758 | if (Base.isSimple()) { |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1759 | llvm::Constant *CV = GenerateConstantVector(getLLVMContext(), Indices); |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1760 | return LValue::MakeExtVectorElt(Base.getAddress(), CV, type); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1761 | } |
| 1762 | assert(Base.isExtVectorElt() && "Can only subscript lvalue vec elts here!"); |
| 1763 | |
| 1764 | llvm::Constant *BaseElts = Base.getExtVectorElts(); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1765 | SmallVector<llvm::Constant *, 4> CElts; |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1766 | |
| 1767 | for (unsigned i = 0, e = Indices.size(); i != e; ++i) { |
| 1768 | if (isa<llvm::ConstantAggregateZero>(BaseElts)) |
Chris Lattner | 6766586 | 2009-10-28 05:12:07 +0000 | [diff] [blame] | 1769 | CElts.push_back(llvm::ConstantInt::get(Int32Ty, 0)); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1770 | else |
Chris Lattner | 6766586 | 2009-10-28 05:12:07 +0000 | [diff] [blame] | 1771 | CElts.push_back(cast<llvm::Constant>(BaseElts->getOperand(Indices[i]))); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1772 | } |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1773 | llvm::Constant *CV = llvm::ConstantVector::get(CElts); |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1774 | return LValue::MakeExtVectorElt(Base.getExtVectorAddr(), CV, type); |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 1775 | } |
| 1776 | |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1777 | LValue CodeGenFunction::EmitMemberExpr(const MemberExpr *E) { |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 1778 | bool isNonGC = false; |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 1779 | Expr *BaseExpr = E->getBase(); |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 1780 | llvm::Value *BaseValue = NULL; |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1781 | Qualifiers BaseQuals; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1782 | |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1783 | // If this is s.x, emit s as an lvalue. If it is s->x, emit s as a scalar. |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 1784 | if (E->isArrow()) { |
Devang Patel | 0a96118 | 2007-10-26 18:15:21 +0000 | [diff] [blame] | 1785 | BaseValue = EmitScalarExpr(BaseExpr); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1786 | const PointerType *PTy = |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 1787 | BaseExpr->getType()->getAs<PointerType>(); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1788 | BaseQuals = PTy->getPointeeType().getQualifiers(); |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 1789 | } else { |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1790 | LValue BaseLV = EmitLValue(BaseExpr); |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 1791 | if (BaseLV.isNonGC()) |
| 1792 | isNonGC = true; |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1793 | // FIXME: this isn't right for bitfields. |
| 1794 | BaseValue = BaseLV.getAddress(); |
Fariborz Jahanian | a91d6a6 | 2009-07-29 00:44:13 +0000 | [diff] [blame] | 1795 | QualType BaseTy = BaseExpr->getType(); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1796 | BaseQuals = BaseTy.getQualifiers(); |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1797 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1798 | |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1799 | NamedDecl *ND = E->getMemberDecl(); |
| 1800 | if (FieldDecl *Field = dyn_cast<FieldDecl>(ND)) { |
Anders Carlsson | e6d2a53 | 2010-01-29 05:05:36 +0000 | [diff] [blame] | 1801 | LValue LV = EmitLValueForField(BaseValue, Field, |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1802 | BaseQuals.getCVRQualifiers()); |
Daniel Dunbar | ea61917 | 2010-08-21 03:22:38 +0000 | [diff] [blame] | 1803 | LV.setNonGC(isNonGC); |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1804 | setObjCGCLValueClass(getContext(), E, LV); |
| 1805 | return LV; |
| 1806 | } |
| 1807 | |
Anders Carlsson | 589f9e3 | 2009-11-07 23:16:50 +0000 | [diff] [blame] | 1808 | if (VarDecl *VD = dyn_cast<VarDecl>(ND)) |
| 1809 | return EmitGlobalVarDeclLValue(*this, E, VD); |
Eli Friedman | 9a14630 | 2009-11-26 06:08:14 +0000 | [diff] [blame] | 1810 | |
| 1811 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) |
| 1812 | return EmitFunctionDeclLValue(*this, E, FD); |
| 1813 | |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1814 | llvm_unreachable("Unhandled member declaration!"); |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 1815 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1816 | |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1817 | LValue CodeGenFunction::EmitLValueForBitfield(llvm::Value *BaseValue, |
| 1818 | const FieldDecl *Field, |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 1819 | unsigned CVRQualifiers) { |
Daniel Dunbar | 198bcb4 | 2010-03-31 01:09:11 +0000 | [diff] [blame] | 1820 | const CGRecordLayout &RL = |
| 1821 | CGM.getTypes().getCGRecordLayout(Field->getParent()); |
Daniel Dunbar | 2eec0b2 | 2010-04-05 16:20:44 +0000 | [diff] [blame] | 1822 | const CGBitFieldInfo &Info = RL.getBitFieldInfo(Field); |
Daniel Dunbar | 7f28964 | 2010-04-08 02:59:45 +0000 | [diff] [blame] | 1823 | return LValue::MakeBitfield(BaseValue, Info, |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1824 | Field->getType().withCVRQualifiers(CVRQualifiers)); |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 1825 | } |
| 1826 | |
John McCall | a9976d3 | 2010-05-21 01:18:57 +0000 | [diff] [blame] | 1827 | /// EmitLValueForAnonRecordField - Given that the field is a member of |
| 1828 | /// an anonymous struct or union buried inside a record, and given |
| 1829 | /// that the base value is a pointer to the enclosing record, derive |
| 1830 | /// an lvalue for the ultimate field. |
| 1831 | LValue CodeGenFunction::EmitLValueForAnonRecordField(llvm::Value *BaseValue, |
Francois Pichet | 00eb3f9 | 2010-12-04 09:14:42 +0000 | [diff] [blame] | 1832 | const IndirectFieldDecl *Field, |
John McCall | a9976d3 | 2010-05-21 01:18:57 +0000 | [diff] [blame] | 1833 | unsigned CVRQualifiers) { |
Francois Pichet | 00eb3f9 | 2010-12-04 09:14:42 +0000 | [diff] [blame] | 1834 | IndirectFieldDecl::chain_iterator I = Field->chain_begin(), |
| 1835 | IEnd = Field->chain_end(); |
John McCall | a9976d3 | 2010-05-21 01:18:57 +0000 | [diff] [blame] | 1836 | while (true) { |
Chris Lattner | b644425 | 2011-05-22 22:09:06 +0000 | [diff] [blame] | 1837 | LValue LV = EmitLValueForField(BaseValue, cast<FieldDecl>(*I), |
| 1838 | CVRQualifiers); |
Francois Pichet | 00eb3f9 | 2010-12-04 09:14:42 +0000 | [diff] [blame] | 1839 | if (++I == IEnd) return LV; |
John McCall | a9976d3 | 2010-05-21 01:18:57 +0000 | [diff] [blame] | 1840 | |
| 1841 | assert(LV.isSimple()); |
| 1842 | BaseValue = LV.getAddress(); |
| 1843 | CVRQualifiers |= LV.getVRQualifiers(); |
| 1844 | } |
| 1845 | } |
| 1846 | |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1847 | LValue CodeGenFunction::EmitLValueForField(llvm::Value *baseAddr, |
| 1848 | const FieldDecl *field, |
| 1849 | unsigned cvr) { |
| 1850 | if (field->isBitField()) |
| 1851 | return EmitLValueForBitfield(baseAddr, field, cvr); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1852 | |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1853 | const RecordDecl *rec = field->getParent(); |
| 1854 | QualType type = field->getType(); |
Eli Friedman | 2f77b3d | 2011-11-16 00:42:57 +0000 | [diff] [blame] | 1855 | unsigned alignment = getContext().getDeclAlign(field).getQuantity(); |
Eli Friedman | 1e86b34 | 2008-05-29 11:33:25 +0000 | [diff] [blame] | 1856 | |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1857 | bool mayAlias = rec->hasAttr<MayAliasAttr>(); |
| 1858 | |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 1859 | llvm::Value *addr = baseAddr; |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1860 | if (rec->isUnion()) { |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 1861 | // For unions, there is no pointer adjustment. |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1862 | assert(!type->isReferenceType() && "union has reference member"); |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1863 | } else { |
| 1864 | // For structs, we GEP to the field that the record layout suggests. |
| 1865 | unsigned idx = CGM.getTypes().getCGRecordLayout(rec).getLLVMFieldNo(field); |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 1866 | addr = Builder.CreateStructGEP(addr, idx, field->getName()); |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1867 | |
| 1868 | // If this is a reference field, load the reference right now. |
| 1869 | if (const ReferenceType *refType = type->getAs<ReferenceType>()) { |
| 1870 | llvm::LoadInst *load = Builder.CreateLoad(addr, "ref"); |
| 1871 | if (cvr & Qualifiers::Volatile) load->setVolatile(true); |
Eli Friedman | 2f77b3d | 2011-11-16 00:42:57 +0000 | [diff] [blame] | 1872 | load->setAlignment(alignment); |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1873 | |
| 1874 | if (CGM.shouldUseTBAA()) { |
| 1875 | llvm::MDNode *tbaa; |
| 1876 | if (mayAlias) |
| 1877 | tbaa = CGM.getTBAAInfo(getContext().CharTy); |
| 1878 | else |
| 1879 | tbaa = CGM.getTBAAInfo(type); |
| 1880 | CGM.DecorateInstruction(load, tbaa); |
| 1881 | } |
| 1882 | |
| 1883 | addr = load; |
| 1884 | mayAlias = false; |
| 1885 | type = refType->getPointeeType(); |
Eli Friedman | 2f77b3d | 2011-11-16 00:42:57 +0000 | [diff] [blame] | 1886 | if (type->isIncompleteType()) |
| 1887 | alignment = 0; |
| 1888 | else |
| 1889 | alignment = getContext().getTypeAlignInChars(type).getQuantity(); |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1890 | cvr = 0; // qualifiers don't recursively apply to referencee |
| 1891 | } |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 1892 | } |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 1893 | |
| 1894 | // Make sure that the address is pointing to the right type. This is critical |
| 1895 | // for both unions and structs. A union needs a bitcast, a struct element |
| 1896 | // will need a bitcast if the LLVM type laid out doesn't match the desired |
| 1897 | // type. |
Chandler Carruth | a98742c | 2011-07-12 08:58:26 +0000 | [diff] [blame] | 1898 | addr = EmitBitCastOfLValueToProperType(*this, addr, |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1899 | CGM.getTypes().ConvertTypeForMem(type), |
| 1900 | field->getName()); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1901 | |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1902 | if (field->hasAttr<AnnotateAttr>()) |
| 1903 | addr = EmitFieldAnnotations(field, addr); |
| 1904 | |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1905 | LValue LV = MakeAddrLValue(addr, type, alignment); |
| 1906 | LV.getQuals().addCVRQualifiers(cvr); |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1907 | |
Fariborz Jahanian | fd02ed7 | 2009-09-21 18:54:29 +0000 | [diff] [blame] | 1908 | // __weak attribute on a field is ignored. |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1909 | if (LV.getQuals().getObjCGCAttr() == Qualifiers::Weak) |
| 1910 | LV.getQuals().removeObjCGCAttr(); |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1911 | |
| 1912 | // Fields of may_alias structs act like 'char' for TBAA purposes. |
| 1913 | // FIXME: this should get propagated down through anonymous structs |
| 1914 | // and unions. |
| 1915 | if (mayAlias && LV.getTBAAInfo()) |
| 1916 | LV.setTBAAInfo(CGM.getTBAAInfo(getContext().CharTy)); |
| 1917 | |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1918 | return LV; |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1919 | } |
| 1920 | |
Anders Carlsson | 06a2970 | 2010-01-29 05:24:29 +0000 | [diff] [blame] | 1921 | LValue |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1922 | CodeGenFunction::EmitLValueForFieldInitialization(llvm::Value *BaseValue, |
| 1923 | const FieldDecl *Field, |
Anders Carlsson | 06a2970 | 2010-01-29 05:24:29 +0000 | [diff] [blame] | 1924 | unsigned CVRQualifiers) { |
| 1925 | QualType FieldType = Field->getType(); |
| 1926 | |
| 1927 | if (!FieldType->isReferenceType()) |
| 1928 | return EmitLValueForField(BaseValue, Field, CVRQualifiers); |
| 1929 | |
Daniel Dunbar | 198bcb4 | 2010-03-31 01:09:11 +0000 | [diff] [blame] | 1930 | const CGRecordLayout &RL = |
| 1931 | CGM.getTypes().getCGRecordLayout(Field->getParent()); |
| 1932 | unsigned idx = RL.getLLVMFieldNo(Field); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1933 | llvm::Value *V = Builder.CreateStructGEP(BaseValue, idx); |
Anders Carlsson | 06a2970 | 2010-01-29 05:24:29 +0000 | [diff] [blame] | 1934 | assert(!FieldType.getObjCGCAttr() && "fields cannot have GC attrs"); |
| 1935 | |
Chris Lattner | 1b5ba85 | 2011-07-10 05:53:24 +0000 | [diff] [blame] | 1936 | |
| 1937 | // Make sure that the address is pointing to the right type. This is critical |
| 1938 | // for both unions and structs. A union needs a bitcast, a struct element |
| 1939 | // will need a bitcast if the LLVM type laid out doesn't match the desired |
| 1940 | // type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1941 | llvm::Type *llvmType = ConvertTypeForMem(FieldType); |
Chris Lattner | 1b5ba85 | 2011-07-10 05:53:24 +0000 | [diff] [blame] | 1942 | unsigned AS = cast<llvm::PointerType>(V->getType())->getAddressSpace(); |
| 1943 | V = Builder.CreateBitCast(V, llvmType->getPointerTo(AS)); |
| 1944 | |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1945 | unsigned Alignment = getContext().getDeclAlign(Field).getQuantity(); |
| 1946 | return MakeAddrLValue(V, FieldType, Alignment); |
Anders Carlsson | 06a2970 | 2010-01-29 05:24:29 +0000 | [diff] [blame] | 1947 | } |
| 1948 | |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1949 | LValue CodeGenFunction::EmitCompoundLiteralLValue(const CompoundLiteralExpr *E){ |
Richard Smith | 7401cf5 | 2011-11-22 22:48:32 +0000 | [diff] [blame] | 1950 | if (E->isFileScope()) { |
| 1951 | llvm::Value *GlobalPtr = CGM.GetAddrOfConstantCompoundLiteral(E); |
| 1952 | return MakeAddrLValue(GlobalPtr, E->getType()); |
| 1953 | } |
| 1954 | |
Daniel Dunbar | 1500657 | 2010-02-16 19:43:39 +0000 | [diff] [blame] | 1955 | llvm::Value *DeclPtr = CreateMemTemp(E->getType(), ".compoundliteral"); |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1956 | const Expr *InitExpr = E->getInitializer(); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 1957 | LValue Result = MakeAddrLValue(DeclPtr, E->getType()); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 1958 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1959 | EmitAnyExprToMem(InitExpr, DeclPtr, E->getType().getQualifiers(), |
| 1960 | /*Init*/ true); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 1961 | |
| 1962 | return Result; |
| 1963 | } |
| 1964 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1965 | LValue CodeGenFunction:: |
| 1966 | EmitConditionalOperatorLValue(const AbstractConditionalOperator *expr) { |
| 1967 | if (!expr->isGLValue()) { |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1968 | // ?: here should be an aggregate. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1969 | assert((hasAggregateLLVMType(expr->getType()) && |
| 1970 | !expr->getType()->isAnyComplexType()) && |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1971 | "Unexpected conditional operator!"); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1972 | return EmitAggExprToLValue(expr); |
Anders Carlsson | 6fcec8b | 2009-09-15 16:35:24 +0000 | [diff] [blame] | 1973 | } |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 1974 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1975 | const Expr *condExpr = expr->getCond(); |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1976 | bool CondExprBool; |
| 1977 | if (ConstantFoldsToSimpleInteger(condExpr, CondExprBool)) { |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1978 | const Expr *live = expr->getTrueExpr(), *dead = expr->getFalseExpr(); |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1979 | if (!CondExprBool) std::swap(live, dead); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1980 | |
| 1981 | if (!ContainsLabel(dead)) |
| 1982 | return EmitLValue(live); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1983 | } |
| 1984 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1985 | OpaqueValueMapping binding(*this, expr); |
| 1986 | |
| 1987 | llvm::BasicBlock *lhsBlock = createBasicBlock("cond.true"); |
| 1988 | llvm::BasicBlock *rhsBlock = createBasicBlock("cond.false"); |
| 1989 | llvm::BasicBlock *contBlock = createBasicBlock("cond.end"); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1990 | |
| 1991 | ConditionalEvaluation eval(*this); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1992 | EmitBranchOnBoolExpr(condExpr, lhsBlock, rhsBlock); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1993 | |
| 1994 | // Any temporaries created here are conditional. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1995 | EmitBlock(lhsBlock); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1996 | eval.begin(*this); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1997 | LValue lhs = EmitLValue(expr->getTrueExpr()); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1998 | eval.end(*this); |
| 1999 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 2000 | if (!lhs.isSimple()) |
| 2001 | return EmitUnsupportedLValue(expr, "conditional operator"); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 2002 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 2003 | lhsBlock = Builder.GetInsertBlock(); |
| 2004 | Builder.CreateBr(contBlock); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 2005 | |
| 2006 | // Any temporaries created here are conditional. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 2007 | EmitBlock(rhsBlock); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 2008 | eval.begin(*this); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 2009 | LValue rhs = EmitLValue(expr->getFalseExpr()); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 2010 | eval.end(*this); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 2011 | if (!rhs.isSimple()) |
| 2012 | return EmitUnsupportedLValue(expr, "conditional operator"); |
| 2013 | rhsBlock = Builder.GetInsertBlock(); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 2014 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 2015 | EmitBlock(contBlock); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 2016 | |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 2017 | llvm::PHINode *phi = Builder.CreatePHI(lhs.getAddress()->getType(), 2, |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 2018 | "cond-lvalue"); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 2019 | phi->addIncoming(lhs.getAddress(), lhsBlock); |
| 2020 | phi->addIncoming(rhs.getAddress(), rhsBlock); |
| 2021 | return MakeAddrLValue(phi, expr->getType()); |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 2022 | } |
| 2023 | |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 2024 | /// EmitCastLValue - Casts are never lvalues unless that cast is a dynamic_cast. |
| 2025 | /// If the cast is a dynamic_cast, we can have the usual lvalue result, |
| 2026 | /// otherwise if a cast is needed by the code generator in an lvalue context, |
| 2027 | /// then it must mean that we need the address of an aggregate in order to |
| 2028 | /// access one of its fields. This can happen for all the reasons that casts |
| 2029 | /// are permitted with aggregate result, including noop aggregate casts, and |
| 2030 | /// cast from scalar to union. |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 2031 | LValue CodeGenFunction::EmitCastLValue(const CastExpr *E) { |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2032 | switch (E->getCastKind()) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2033 | case CK_ToVoid: |
Eli Friedman | eaae78a | 2009-11-16 05:48:01 +0000 | [diff] [blame] | 2034 | return EmitUnsupportedLValue(E, "unexpected cast lvalue"); |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2035 | |
| 2036 | case CK_Dependent: |
| 2037 | llvm_unreachable("dependent cast kind in IR gen!"); |
| 2038 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2039 | case CK_NoOp: |
Douglas Gregor | b3d5e2f | 2011-01-27 23:22:05 +0000 | [diff] [blame] | 2040 | case CK_LValueToRValue: |
| 2041 | if (!E->getSubExpr()->Classify(getContext()).isPRValue() |
| 2042 | || E->getType()->isRecordType()) |
John McCall | 0e800c9 | 2010-12-04 08:14:53 +0000 | [diff] [blame] | 2043 | return EmitLValue(E->getSubExpr()); |
Douglas Gregor | 7c7a793 | 2010-07-15 18:58:16 +0000 | [diff] [blame] | 2044 | // Fall through to synthesize a temporary. |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2045 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2046 | case CK_BitCast: |
| 2047 | case CK_ArrayToPointerDecay: |
| 2048 | case CK_FunctionToPointerDecay: |
| 2049 | case CK_NullToMemberPointer: |
John McCall | 404cd16 | 2010-11-13 01:35:44 +0000 | [diff] [blame] | 2050 | case CK_NullToPointer: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2051 | case CK_IntegralToPointer: |
| 2052 | case CK_PointerToIntegral: |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2053 | case CK_PointerToBoolean: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2054 | case CK_VectorSplat: |
| 2055 | case CK_IntegralCast: |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2056 | case CK_IntegralToBoolean: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2057 | case CK_IntegralToFloating: |
| 2058 | case CK_FloatingToIntegral: |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2059 | case CK_FloatingToBoolean: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2060 | case CK_FloatingCast: |
John McCall | 2bb5d00 | 2010-11-13 09:02:35 +0000 | [diff] [blame] | 2061 | case CK_FloatingRealToComplex: |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 2062 | case CK_FloatingComplexToReal: |
| 2063 | case CK_FloatingComplexToBoolean: |
John McCall | 2bb5d00 | 2010-11-13 09:02:35 +0000 | [diff] [blame] | 2064 | case CK_FloatingComplexCast: |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 2065 | case CK_FloatingComplexToIntegralComplex: |
John McCall | 2bb5d00 | 2010-11-13 09:02:35 +0000 | [diff] [blame] | 2066 | case CK_IntegralRealToComplex: |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 2067 | case CK_IntegralComplexToReal: |
| 2068 | case CK_IntegralComplexToBoolean: |
John McCall | 2bb5d00 | 2010-11-13 09:02:35 +0000 | [diff] [blame] | 2069 | case CK_IntegralComplexCast: |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 2070 | case CK_IntegralComplexToFloatingComplex: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2071 | case CK_DerivedToBaseMemberPointer: |
| 2072 | case CK_BaseToDerivedMemberPointer: |
| 2073 | case CK_MemberPointerToBoolean: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2074 | case CK_AnyPointerToBlockPointerCast: |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 2075 | case CK_ARCProduceObject: |
| 2076 | case CK_ARCConsumeObject: |
| 2077 | case CK_ARCReclaimReturnedObject: |
| 2078 | case CK_ARCExtendBlockObject: { |
Douglas Gregor | 7c7a793 | 2010-07-15 18:58:16 +0000 | [diff] [blame] | 2079 | // These casts only produce lvalues when we're binding a reference to a |
| 2080 | // temporary realized from a (converted) pure rvalue. Emit the expression |
| 2081 | // as a value, copy it into a temporary, and return an lvalue referring to |
| 2082 | // that temporary. |
| 2083 | llvm::Value *V = CreateMemTemp(E->getType(), "ref.temp"); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2084 | EmitAnyExprToMem(E, V, E->getType().getQualifiers(), false); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2085 | return MakeAddrLValue(V, E->getType()); |
Douglas Gregor | 7c7a793 | 2010-07-15 18:58:16 +0000 | [diff] [blame] | 2086 | } |
Eli Friedman | eaae78a | 2009-11-16 05:48:01 +0000 | [diff] [blame] | 2087 | |
Anders Carlsson | 575b374 | 2011-04-11 02:03:26 +0000 | [diff] [blame] | 2088 | case CK_Dynamic: { |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 2089 | LValue LV = EmitLValue(E->getSubExpr()); |
| 2090 | llvm::Value *V = LV.getAddress(); |
| 2091 | const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(E); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2092 | return MakeAddrLValue(EmitDynamicCast(V, DCE), E->getType()); |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 2093 | } |
| 2094 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2095 | case CK_ConstructorConversion: |
| 2096 | case CK_UserDefinedConversion: |
John McCall | 1d9b3b2 | 2011-09-09 05:25:32 +0000 | [diff] [blame] | 2097 | case CK_CPointerToObjCPointerCast: |
| 2098 | case CK_BlockPointerToObjCPointerCast: |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 2099 | return EmitLValue(E->getSubExpr()); |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2100 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2101 | case CK_UncheckedDerivedToBase: |
| 2102 | case CK_DerivedToBase: { |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2103 | const RecordType *DerivedClassTy = |
| 2104 | E->getSubExpr()->getType()->getAs<RecordType>(); |
| 2105 | CXXRecordDecl *DerivedClassDecl = |
| 2106 | cast<CXXRecordDecl>(DerivedClassTy->getDecl()); |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2107 | |
| 2108 | LValue LV = EmitLValue(E->getSubExpr()); |
John McCall | 0e800c9 | 2010-12-04 08:14:53 +0000 | [diff] [blame] | 2109 | llvm::Value *This = LV.getAddress(); |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2110 | |
| 2111 | // Perform the derived-to-base conversion |
| 2112 | llvm::Value *Base = |
Fariborz Jahanian | 353b33b | 2010-06-17 23:00:29 +0000 | [diff] [blame] | 2113 | GetAddressOfBaseClass(This, DerivedClassDecl, |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 2114 | E->path_begin(), E->path_end(), |
| 2115 | /*NullCheckValue=*/false); |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2116 | |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2117 | return MakeAddrLValue(Base, E->getType()); |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2118 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2119 | case CK_ToUnion: |
Daniel Dunbar | b2cd777 | 2010-02-05 20:02:42 +0000 | [diff] [blame] | 2120 | return EmitAggExprToLValue(E); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2121 | case CK_BaseToDerived: { |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 2122 | const RecordType *DerivedClassTy = E->getType()->getAs<RecordType>(); |
| 2123 | CXXRecordDecl *DerivedClassDecl = |
| 2124 | cast<CXXRecordDecl>(DerivedClassTy->getDecl()); |
| 2125 | |
| 2126 | LValue LV = EmitLValue(E->getSubExpr()); |
| 2127 | |
| 2128 | // Perform the base-to-derived conversion |
| 2129 | llvm::Value *Derived = |
Anders Carlsson | a04efdf | 2010-04-24 21:23:59 +0000 | [diff] [blame] | 2130 | GetAddressOfDerivedClass(LV.getAddress(), DerivedClassDecl, |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 2131 | E->path_begin(), E->path_end(), |
| 2132 | /*NullCheckValue=*/false); |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 2133 | |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2134 | return MakeAddrLValue(Derived, E->getType()); |
Eli Friedman | eaae78a | 2009-11-16 05:48:01 +0000 | [diff] [blame] | 2135 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2136 | case CK_LValueBitCast: { |
Eli Friedman | eaae78a | 2009-11-16 05:48:01 +0000 | [diff] [blame] | 2137 | // This must be a reinterpret_cast (or c-style equivalent). |
| 2138 | const ExplicitCastExpr *CE = cast<ExplicitCastExpr>(E); |
Anders Carlsson | 658e812 | 2009-11-14 21:21:42 +0000 | [diff] [blame] | 2139 | |
| 2140 | LValue LV = EmitLValue(E->getSubExpr()); |
| 2141 | llvm::Value *V = Builder.CreateBitCast(LV.getAddress(), |
| 2142 | ConvertType(CE->getTypeAsWritten())); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2143 | return MakeAddrLValue(V, E->getType()); |
Anders Carlsson | 658e812 | 2009-11-14 21:21:42 +0000 | [diff] [blame] | 2144 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2145 | case CK_ObjCObjectLValueCast: { |
Douglas Gregor | 569c316 | 2010-08-07 11:51:51 +0000 | [diff] [blame] | 2146 | LValue LV = EmitLValue(E->getSubExpr()); |
| 2147 | QualType ToType = getContext().getLValueReferenceType(E->getType()); |
| 2148 | llvm::Value *V = Builder.CreateBitCast(LV.getAddress(), |
| 2149 | ConvertType(ToType)); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2150 | return MakeAddrLValue(V, E->getType()); |
Douglas Gregor | 569c316 | 2010-08-07 11:51:51 +0000 | [diff] [blame] | 2151 | } |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2152 | } |
Douglas Gregor | 7c7a793 | 2010-07-15 18:58:16 +0000 | [diff] [blame] | 2153 | |
| 2154 | llvm_unreachable("Unhandled lvalue cast kind?"); |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 2155 | } |
| 2156 | |
Fariborz Jahanian | 48620ba | 2009-10-20 23:29:04 +0000 | [diff] [blame] | 2157 | LValue CodeGenFunction::EmitNullInitializationLValue( |
Douglas Gregor | ed8abf1 | 2010-07-08 06:14:04 +0000 | [diff] [blame] | 2158 | const CXXScalarValueInitExpr *E) { |
Fariborz Jahanian | 48620ba | 2009-10-20 23:29:04 +0000 | [diff] [blame] | 2159 | QualType Ty = E->getType(); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2160 | LValue LV = MakeAddrLValue(CreateMemTemp(Ty), Ty); |
Anders Carlsson | 1884eb0 | 2010-05-22 17:35:42 +0000 | [diff] [blame] | 2161 | EmitNullInitialization(LV.getAddress(), Ty); |
Daniel Dunbar | 195337d | 2010-02-09 02:48:28 +0000 | [diff] [blame] | 2162 | return LV; |
Fariborz Jahanian | 48620ba | 2009-10-20 23:29:04 +0000 | [diff] [blame] | 2163 | } |
| 2164 | |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 2165 | LValue CodeGenFunction::EmitOpaqueValueLValue(const OpaqueValueExpr *e) { |
John McCall | a5493f8 | 2011-11-08 22:54:08 +0000 | [diff] [blame] | 2166 | assert(OpaqueValueMappingData::shouldBindAsLValue(e)); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 2167 | return getOpaqueLValueMapping(e); |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 2168 | } |
| 2169 | |
Douglas Gregor | 03e8003 | 2011-06-21 17:03:29 +0000 | [diff] [blame] | 2170 | LValue CodeGenFunction::EmitMaterializeTemporaryExpr( |
| 2171 | const MaterializeTemporaryExpr *E) { |
John McCall | cec52f0 | 2011-08-26 21:08:13 +0000 | [diff] [blame] | 2172 | RValue RV = EmitReferenceBindingToExpr(E, /*InitializedDecl=*/0); |
Douglas Gregor | 0b58108 | 2011-06-21 18:20:46 +0000 | [diff] [blame] | 2173 | return MakeAddrLValue(RV.getScalarVal(), E->getType()); |
Douglas Gregor | 03e8003 | 2011-06-21 17:03:29 +0000 | [diff] [blame] | 2174 | } |
| 2175 | |
| 2176 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2177 | //===--------------------------------------------------------------------===// |
| 2178 | // Expression Emission |
| 2179 | //===--------------------------------------------------------------------===// |
| 2180 | |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 2181 | RValue CodeGenFunction::EmitCallExpr(const CallExpr *E, |
| 2182 | ReturnValueSlot ReturnValue) { |
Eric Christopher | 73fb350 | 2011-10-13 21:45:18 +0000 | [diff] [blame] | 2183 | if (CGDebugInfo *DI = getDebugInfo()) |
| 2184 | DI->EmitLocation(Builder, E->getLocStart()); |
Devang Patel | 79bfb4b | 2011-03-04 18:54:42 +0000 | [diff] [blame] | 2185 | |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 2186 | // Builtins never have block type. |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 2187 | if (E->getCallee()->getType()->isBlockPointerType()) |
Anders Carlsson | a1736c0 | 2009-12-24 21:13:40 +0000 | [diff] [blame] | 2188 | return EmitBlockCallExpr(E, ReturnValue); |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 2189 | |
Anders Carlsson | 774e7c6 | 2009-04-03 22:50:24 +0000 | [diff] [blame] | 2190 | if (const CXXMemberCallExpr *CE = dyn_cast<CXXMemberCallExpr>(E)) |
Anders Carlsson | a1736c0 | 2009-12-24 21:13:40 +0000 | [diff] [blame] | 2191 | return EmitCXXMemberCallExpr(CE, ReturnValue); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2192 | |
Peter Collingbourne | 6c0aa5f | 2011-10-06 18:29:37 +0000 | [diff] [blame] | 2193 | if (const CUDAKernelCallExpr *CE = dyn_cast<CUDAKernelCallExpr>(E)) |
| 2194 | return EmitCUDAKernelCallExpr(CE, ReturnValue); |
| 2195 | |
Douglas Gregor | 1ddc9c4 | 2011-09-06 21:41:04 +0000 | [diff] [blame] | 2196 | const Decl *TargetDecl = E->getCalleeDecl(); |
| 2197 | if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(TargetDecl)) { |
| 2198 | if (unsigned builtinID = FD->getBuiltinID()) |
| 2199 | return EmitBuiltinExpr(FD, builtinID, E); |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 2200 | } |
| 2201 | |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 2202 | if (const CXXOperatorCallExpr *CE = dyn_cast<CXXOperatorCallExpr>(E)) |
Anders Carlsson | 0f29463 | 2009-05-27 04:18:27 +0000 | [diff] [blame] | 2203 | if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(TargetDecl)) |
Anders Carlsson | a1736c0 | 2009-12-24 21:13:40 +0000 | [diff] [blame] | 2204 | return EmitCXXOperatorMemberCallExpr(CE, MD, ReturnValue); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2205 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2206 | if (const CXXPseudoDestructorExpr *PseudoDtor |
| 2207 | = dyn_cast<CXXPseudoDestructorExpr>(E->getCallee()->IgnoreParens())) { |
| 2208 | QualType DestroyedType = PseudoDtor->getDestroyedType(); |
| 2209 | if (getContext().getLangOptions().ObjCAutoRefCount && |
| 2210 | DestroyedType->isObjCLifetimeType() && |
| 2211 | (DestroyedType.getObjCLifetime() == Qualifiers::OCL_Strong || |
| 2212 | DestroyedType.getObjCLifetime() == Qualifiers::OCL_Weak)) { |
Benjamin Kramer | d510fd2 | 2011-06-18 10:34:00 +0000 | [diff] [blame] | 2213 | // Automatic Reference Counting: |
| 2214 | // If the pseudo-expression names a retainable object with weak or |
| 2215 | // strong lifetime, the object shall be released. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2216 | Expr *BaseExpr = PseudoDtor->getBase(); |
| 2217 | llvm::Value *BaseValue = NULL; |
| 2218 | Qualifiers BaseQuals; |
| 2219 | |
Benjamin Kramer | d510fd2 | 2011-06-18 10:34:00 +0000 | [diff] [blame] | 2220 | // If this is s.x, emit s as an lvalue. If it is s->x, emit s as a scalar. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2221 | if (PseudoDtor->isArrow()) { |
| 2222 | BaseValue = EmitScalarExpr(BaseExpr); |
| 2223 | const PointerType *PTy = BaseExpr->getType()->getAs<PointerType>(); |
| 2224 | BaseQuals = PTy->getPointeeType().getQualifiers(); |
| 2225 | } else { |
| 2226 | LValue BaseLV = EmitLValue(BaseExpr); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2227 | BaseValue = BaseLV.getAddress(); |
| 2228 | QualType BaseTy = BaseExpr->getType(); |
| 2229 | BaseQuals = BaseTy.getQualifiers(); |
| 2230 | } |
| 2231 | |
| 2232 | switch (PseudoDtor->getDestroyedType().getObjCLifetime()) { |
| 2233 | case Qualifiers::OCL_None: |
| 2234 | case Qualifiers::OCL_ExplicitNone: |
| 2235 | case Qualifiers::OCL_Autoreleasing: |
| 2236 | break; |
| 2237 | |
| 2238 | case Qualifiers::OCL_Strong: |
| 2239 | EmitARCRelease(Builder.CreateLoad(BaseValue, |
Benjamin Kramer | d510fd2 | 2011-06-18 10:34:00 +0000 | [diff] [blame] | 2240 | PseudoDtor->getDestroyedType().isVolatileQualified()), |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2241 | /*precise*/ true); |
| 2242 | break; |
| 2243 | |
| 2244 | case Qualifiers::OCL_Weak: |
| 2245 | EmitARCDestroyWeak(BaseValue); |
| 2246 | break; |
| 2247 | } |
| 2248 | } else { |
| 2249 | // C++ [expr.pseudo]p1: |
| 2250 | // The result shall only be used as the operand for the function call |
| 2251 | // operator (), and the result of such a call has type void. The only |
| 2252 | // effect is the evaluation of the postfix-expression before the dot or |
| 2253 | // arrow. |
| 2254 | EmitScalarExpr(E->getCallee()); |
| 2255 | } |
| 2256 | |
Douglas Gregor | a71d819 | 2009-09-04 17:36:40 +0000 | [diff] [blame] | 2257 | return RValue::get(0); |
| 2258 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2259 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2260 | llvm::Value *Callee = EmitScalarExpr(E->getCallee()); |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 2261 | return EmitCall(E->getCallee()->getType(), Callee, ReturnValue, |
Anders Carlsson | 9864771 | 2009-05-27 01:22:39 +0000 | [diff] [blame] | 2262 | E->arg_begin(), E->arg_end(), TargetDecl); |
Chris Lattner | c5e940f | 2007-08-31 04:44:06 +0000 | [diff] [blame] | 2263 | } |
| 2264 | |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 2265 | LValue CodeGenFunction::EmitBinaryOperatorLValue(const BinaryOperator *E) { |
Chris Lattner | 7a574cc | 2009-05-12 21:28:12 +0000 | [diff] [blame] | 2266 | // Comma expressions just emit their LHS then their RHS as an l-value. |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2267 | if (E->getOpcode() == BO_Comma) { |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 2268 | EmitIgnoredExpr(E->getLHS()); |
Eli Friedman | 130c69e | 2009-12-07 20:18:11 +0000 | [diff] [blame] | 2269 | EnsureInsertPoint(); |
Chris Lattner | 7a574cc | 2009-05-12 21:28:12 +0000 | [diff] [blame] | 2270 | return EmitLValue(E->getRHS()); |
| 2271 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2272 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2273 | if (E->getOpcode() == BO_PtrMemD || |
| 2274 | E->getOpcode() == BO_PtrMemI) |
Fariborz Jahanian | 8bfd31f | 2009-10-22 22:57:31 +0000 | [diff] [blame] | 2275 | return EmitPointerToDataMemberBinaryExpr(E); |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 2276 | |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 2277 | assert(E->getOpcode() == BO_Assign && "unexpected binary l-value"); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2278 | |
| 2279 | // Note that in all of these cases, __block variables need the RHS |
| 2280 | // evaluated first just in case the variable gets moved by the RHS. |
John McCall | 83ce9d4 | 2010-11-16 23:07:28 +0000 | [diff] [blame] | 2281 | |
Anders Carlsson | 86aa0cd | 2009-10-19 18:28:22 +0000 | [diff] [blame] | 2282 | if (!hasAggregateLLVMType(E->getType())) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2283 | switch (E->getLHS()->getType().getObjCLifetime()) { |
| 2284 | case Qualifiers::OCL_Strong: |
| 2285 | return EmitARCStoreStrong(E, /*ignored*/ false).first; |
| 2286 | |
| 2287 | case Qualifiers::OCL_Autoreleasing: |
| 2288 | return EmitARCStoreAutoreleasing(E).first; |
| 2289 | |
| 2290 | // No reason to do any of these differently. |
| 2291 | case Qualifiers::OCL_None: |
| 2292 | case Qualifiers::OCL_ExplicitNone: |
| 2293 | case Qualifiers::OCL_Weak: |
| 2294 | break; |
| 2295 | } |
| 2296 | |
John McCall | cd940a1 | 2010-12-06 06:10:02 +0000 | [diff] [blame] | 2297 | RValue RV = EmitAnyExpr(E->getRHS()); |
Anders Carlsson | 86aa0cd | 2009-10-19 18:28:22 +0000 | [diff] [blame] | 2298 | LValue LV = EmitLValue(E->getLHS()); |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2299 | EmitStoreThroughLValue(RV, LV); |
Anders Carlsson | 86aa0cd | 2009-10-19 18:28:22 +0000 | [diff] [blame] | 2300 | return LV; |
| 2301 | } |
John McCall | 83ce9d4 | 2010-11-16 23:07:28 +0000 | [diff] [blame] | 2302 | |
| 2303 | if (E->getType()->isAnyComplexType()) |
| 2304 | return EmitComplexAssignmentLValue(E); |
| 2305 | |
Daniel Dunbar | 18aba0d | 2010-02-05 19:38:31 +0000 | [diff] [blame] | 2306 | return EmitAggExprToLValue(E); |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 2307 | } |
| 2308 | |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 2309 | LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E) { |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 2310 | RValue RV = EmitCallExpr(E); |
Anders Carlsson | 4826568 | 2009-05-27 01:45:47 +0000 | [diff] [blame] | 2311 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 2312 | if (!RV.isScalar()) |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2313 | return MakeAddrLValue(RV.getAggregateAddr(), E->getType()); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 2314 | |
| 2315 | assert(E->getCallReturnType()->isReferenceType() && |
| 2316 | "Can't have a scalar return unless the return type is a " |
| 2317 | "reference type!"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2318 | |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2319 | return MakeAddrLValue(RV.getScalarVal(), E->getType()); |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 2320 | } |
| 2321 | |
Daniel Dunbar | 5b5c9ef | 2009-02-11 20:59:32 +0000 | [diff] [blame] | 2322 | LValue CodeGenFunction::EmitVAArgExprLValue(const VAArgExpr *E) { |
| 2323 | // FIXME: This shouldn't require another copy. |
Daniel Dunbar | 18aba0d | 2010-02-05 19:38:31 +0000 | [diff] [blame] | 2324 | return EmitAggExprToLValue(E); |
Daniel Dunbar | 5b5c9ef | 2009-02-11 20:59:32 +0000 | [diff] [blame] | 2325 | } |
| 2326 | |
Anders Carlsson | b58d017 | 2009-05-30 23:23:33 +0000 | [diff] [blame] | 2327 | LValue CodeGenFunction::EmitCXXConstructLValue(const CXXConstructExpr *E) { |
John McCall | fc1e6c7 | 2010-09-18 00:58:34 +0000 | [diff] [blame] | 2328 | assert(E->getType()->getAsCXXRecordDecl()->hasTrivialDestructor() |
| 2329 | && "binding l-value to type which needs a temporary"); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 2330 | AggValueSlot Slot = CreateAggTemp(E->getType()); |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 2331 | EmitCXXConstructExpr(E, Slot); |
| 2332 | return MakeAddrLValue(Slot.getAddr(), E->getType()); |
Anders Carlsson | b58d017 | 2009-05-30 23:23:33 +0000 | [diff] [blame] | 2333 | } |
| 2334 | |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 2335 | LValue |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 2336 | CodeGenFunction::EmitCXXTypeidLValue(const CXXTypeidExpr *E) { |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2337 | return MakeAddrLValue(EmitCXXTypeidExpr(E), E->getType()); |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 2338 | } |
| 2339 | |
| 2340 | LValue |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 2341 | CodeGenFunction::EmitCXXBindTemporaryLValue(const CXXBindTemporaryExpr *E) { |
John McCall | fc1e6c7 | 2010-09-18 00:58:34 +0000 | [diff] [blame] | 2342 | AggValueSlot Slot = CreateAggTemp(E->getType(), "temp.lvalue"); |
John McCall | fd71fb8 | 2011-08-26 08:02:37 +0000 | [diff] [blame] | 2343 | Slot.setExternallyDestructed(); |
John McCall | fc1e6c7 | 2010-09-18 00:58:34 +0000 | [diff] [blame] | 2344 | EmitAggExpr(E->getSubExpr(), Slot); |
| 2345 | EmitCXXTemporary(E->getTemporary(), Slot.getAddr()); |
| 2346 | return MakeAddrLValue(Slot.getAddr(), E->getType()); |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 2347 | } |
| 2348 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 2349 | LValue CodeGenFunction::EmitObjCMessageExprLValue(const ObjCMessageExpr *E) { |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 2350 | RValue RV = EmitObjCMessageExpr(E); |
Anders Carlsson | 7e70fb2 | 2010-06-21 20:59:55 +0000 | [diff] [blame] | 2351 | |
| 2352 | if (!RV.isScalar()) |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2353 | return MakeAddrLValue(RV.getAggregateAddr(), E->getType()); |
Anders Carlsson | 7e70fb2 | 2010-06-21 20:59:55 +0000 | [diff] [blame] | 2354 | |
| 2355 | assert(E->getMethodDecl()->getResultType()->isReferenceType() && |
| 2356 | "Can't have a scalar return unless the return type is a " |
| 2357 | "reference type!"); |
| 2358 | |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2359 | return MakeAddrLValue(RV.getScalarVal(), E->getType()); |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 2360 | } |
| 2361 | |
Fariborz Jahanian | 03b2960 | 2010-06-17 19:56:20 +0000 | [diff] [blame] | 2362 | LValue CodeGenFunction::EmitObjCSelectorLValue(const ObjCSelectorExpr *E) { |
| 2363 | llvm::Value *V = |
| 2364 | CGM.getObjCRuntime().GetSelector(Builder, E->getSelector(), true); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2365 | return MakeAddrLValue(V, E->getType()); |
Fariborz Jahanian | 03b2960 | 2010-06-17 19:56:20 +0000 | [diff] [blame] | 2366 | } |
| 2367 | |
Daniel Dunbar | 2a03192 | 2009-04-22 05:08:15 +0000 | [diff] [blame] | 2368 | llvm::Value *CodeGenFunction::EmitIvarOffset(const ObjCInterfaceDecl *Interface, |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 2369 | const ObjCIvarDecl *Ivar) { |
Fariborz Jahanian | f63aa3f | 2009-02-10 19:02:04 +0000 | [diff] [blame] | 2370 | return CGM.getObjCRuntime().EmitIvarOffset(*this, Interface, Ivar); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 2371 | } |
| 2372 | |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 2373 | LValue CodeGenFunction::EmitLValueForIvar(QualType ObjectTy, |
| 2374 | llvm::Value *BaseValue, |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 2375 | const ObjCIvarDecl *Ivar, |
| 2376 | unsigned CVRQualifiers) { |
Chris Lattner | 26f074b | 2009-04-17 17:44:48 +0000 | [diff] [blame] | 2377 | return CGM.getObjCRuntime().EmitObjCValueForIvar(*this, ObjectTy, BaseValue, |
Daniel Dunbar | 525c9b7 | 2009-04-21 01:19:28 +0000 | [diff] [blame] | 2378 | Ivar, CVRQualifiers); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 2379 | } |
| 2380 | |
| 2381 | LValue CodeGenFunction::EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E) { |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 2382 | // FIXME: A lot of the code below could be shared with EmitMemberExpr. |
| 2383 | llvm::Value *BaseValue = 0; |
| 2384 | const Expr *BaseExpr = E->getBase(); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 2385 | Qualifiers BaseQuals; |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 2386 | QualType ObjectTy; |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 2387 | if (E->isArrow()) { |
| 2388 | BaseValue = EmitScalarExpr(BaseExpr); |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 2389 | ObjectTy = BaseExpr->getType()->getPointeeType(); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 2390 | BaseQuals = ObjectTy.getQualifiers(); |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 2391 | } else { |
| 2392 | LValue BaseLV = EmitLValue(BaseExpr); |
| 2393 | // FIXME: this isn't right for bitfields. |
| 2394 | BaseValue = BaseLV.getAddress(); |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 2395 | ObjectTy = BaseExpr->getType(); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 2396 | BaseQuals = ObjectTy.getQualifiers(); |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 2397 | } |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 2398 | |
Fariborz Jahanian | dbf3cfd | 2009-09-16 23:11:23 +0000 | [diff] [blame] | 2399 | LValue LV = |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 2400 | EmitLValueForIvar(ObjectTy, BaseValue, E->getDecl(), |
| 2401 | BaseQuals.getCVRQualifiers()); |
Fariborz Jahanian | dbf3cfd | 2009-09-16 23:11:23 +0000 | [diff] [blame] | 2402 | setObjCGCLValueClass(getContext(), E, LV); |
| 2403 | return LV; |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 2404 | } |
| 2405 | |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 2406 | LValue CodeGenFunction::EmitStmtExprLValue(const StmtExpr *E) { |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 2407 | // Can only get l-value for message expression returning aggregate type |
| 2408 | RValue RV = EmitAnyExprToTemp(E); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2409 | return MakeAddrLValue(RV.getAggregateAddr(), E->getType()); |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 2410 | } |
| 2411 | |
Anders Carlsson | 31777a2 | 2009-12-24 19:08:58 +0000 | [diff] [blame] | 2412 | RValue CodeGenFunction::EmitCall(QualType CalleeType, llvm::Value *Callee, |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 2413 | ReturnValueSlot ReturnValue, |
Anders Carlsson | 9864771 | 2009-05-27 01:22:39 +0000 | [diff] [blame] | 2414 | CallExpr::const_arg_iterator ArgBeg, |
| 2415 | CallExpr::const_arg_iterator ArgEnd, |
| 2416 | const Decl *TargetDecl) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2417 | // Get the actual function type. The callee type will always be a pointer to |
| 2418 | // function type or a block pointer type. |
| 2419 | assert(CalleeType->isFunctionPointerType() && |
Anders Carlsson | 8ac67a7 | 2009-04-07 18:53:02 +0000 | [diff] [blame] | 2420 | "Call must have function pointer type!"); |
| 2421 | |
John McCall | 00a1ad9 | 2009-10-23 08:22:42 +0000 | [diff] [blame] | 2422 | CalleeType = getContext().getCanonicalType(CalleeType); |
| 2423 | |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 2424 | const FunctionType *FnType |
| 2425 | = cast<FunctionType>(cast<PointerType>(CalleeType)->getPointeeType()); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 2426 | |
| 2427 | CallArgList Args; |
John McCall | 00a1ad9 | 2009-10-23 08:22:42 +0000 | [diff] [blame] | 2428 | EmitCallArgs(Args, dyn_cast<FunctionProtoType>(FnType), ArgBeg, ArgEnd); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 2429 | |
John McCall | 01f151e | 2011-09-21 08:08:30 +0000 | [diff] [blame] | 2430 | const CGFunctionInfo &FnInfo = CGM.getTypes().getFunctionInfo(Args, FnType); |
| 2431 | |
| 2432 | // C99 6.5.2.2p6: |
| 2433 | // If the expression that denotes the called function has a type |
| 2434 | // that does not include a prototype, [the default argument |
| 2435 | // promotions are performed]. If the number of arguments does not |
| 2436 | // equal the number of parameters, the behavior is undefined. If |
| 2437 | // the function is defined with a type that includes a prototype, |
| 2438 | // and either the prototype ends with an ellipsis (, ...) or the |
| 2439 | // types of the arguments after promotion are not compatible with |
| 2440 | // the types of the parameters, the behavior is undefined. If the |
| 2441 | // function is defined with a type that does not include a |
| 2442 | // prototype, and the types of the arguments after promotion are |
| 2443 | // not compatible with those of the parameters after promotion, |
| 2444 | // the behavior is undefined [except in some trivial cases]. |
| 2445 | // That is, in the general case, we should assume that a call |
| 2446 | // through an unprototyped function type works like a *non-variadic* |
| 2447 | // call. The way we make this work is to cast to the exact type |
| 2448 | // of the promoted arguments. |
| 2449 | if (isa<FunctionNoProtoType>(FnType) && |
| 2450 | !getTargetHooks().isNoProtoCallVariadic(FnType->getCallConv())) { |
| 2451 | assert(cast<llvm::FunctionType>(Callee->getType()->getContainedType(0)) |
| 2452 | ->isVarArg()); |
| 2453 | llvm::Type *CalleeTy = getTypes().GetFunctionType(FnInfo, false); |
| 2454 | CalleeTy = CalleeTy->getPointerTo(); |
| 2455 | Callee = Builder.CreateBitCast(Callee, CalleeTy, "callee.knr.cast"); |
| 2456 | } |
| 2457 | |
| 2458 | return EmitCall(FnInfo, Callee, ReturnValue, Args, TargetDecl); |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 2459 | } |
Fariborz Jahanian | 8bfd31f | 2009-10-22 22:57:31 +0000 | [diff] [blame] | 2460 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 2461 | LValue CodeGenFunction:: |
| 2462 | EmitPointerToDataMemberBinaryExpr(const BinaryOperator *E) { |
Eli Friedman | 1c5c1a0 | 2009-11-18 05:01:17 +0000 | [diff] [blame] | 2463 | llvm::Value *BaseV; |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2464 | if (E->getOpcode() == BO_PtrMemI) |
Eli Friedman | 1c5c1a0 | 2009-11-18 05:01:17 +0000 | [diff] [blame] | 2465 | BaseV = EmitScalarExpr(E->getLHS()); |
| 2466 | else |
| 2467 | BaseV = EmitLValue(E->getLHS()).getAddress(); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 2468 | |
John McCall | 6c2ab1d | 2010-08-31 21:07:20 +0000 | [diff] [blame] | 2469 | llvm::Value *OffsetV = EmitScalarExpr(E->getRHS()); |
| 2470 | |
| 2471 | const MemberPointerType *MPT |
| 2472 | = E->getRHS()->getType()->getAs<MemberPointerType>(); |
| 2473 | |
| 2474 | llvm::Value *AddV = |
| 2475 | CGM.getCXXABI().EmitMemberDataPointerAddress(*this, BaseV, OffsetV, MPT); |
| 2476 | |
| 2477 | return MakeAddrLValue(AddV, MPT->getPointeeType()); |
Fariborz Jahanian | 8bfd31f | 2009-10-22 22:57:31 +0000 | [diff] [blame] | 2478 | } |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 2479 | |
| 2480 | static void |
| 2481 | EmitAtomicOp(CodeGenFunction &CGF, AtomicExpr *E, llvm::Value *Dest, |
| 2482 | llvm::Value *Ptr, llvm::Value *Val1, llvm::Value *Val2, |
| 2483 | uint64_t Size, unsigned Align, llvm::AtomicOrdering Order) { |
| 2484 | if (E->isCmpXChg()) { |
| 2485 | // Note that cmpxchg only supports specifying one ordering and |
| 2486 | // doesn't support weak cmpxchg, at least at the moment. |
| 2487 | llvm::LoadInst *LoadVal1 = CGF.Builder.CreateLoad(Val1); |
| 2488 | LoadVal1->setAlignment(Align); |
| 2489 | llvm::LoadInst *LoadVal2 = CGF.Builder.CreateLoad(Val2); |
| 2490 | LoadVal2->setAlignment(Align); |
| 2491 | llvm::AtomicCmpXchgInst *CXI = |
| 2492 | CGF.Builder.CreateAtomicCmpXchg(Ptr, LoadVal1, LoadVal2, Order); |
| 2493 | CXI->setVolatile(E->isVolatile()); |
| 2494 | llvm::StoreInst *StoreVal1 = CGF.Builder.CreateStore(CXI, Val1); |
| 2495 | StoreVal1->setAlignment(Align); |
| 2496 | llvm::Value *Cmp = CGF.Builder.CreateICmpEQ(CXI, LoadVal1); |
| 2497 | CGF.EmitStoreOfScalar(Cmp, CGF.MakeAddrLValue(Dest, E->getType())); |
| 2498 | return; |
| 2499 | } |
| 2500 | |
| 2501 | if (E->getOp() == AtomicExpr::Load) { |
| 2502 | llvm::LoadInst *Load = CGF.Builder.CreateLoad(Ptr); |
| 2503 | Load->setAtomic(Order); |
| 2504 | Load->setAlignment(Size); |
| 2505 | Load->setVolatile(E->isVolatile()); |
| 2506 | llvm::StoreInst *StoreDest = CGF.Builder.CreateStore(Load, Dest); |
| 2507 | StoreDest->setAlignment(Align); |
| 2508 | return; |
| 2509 | } |
| 2510 | |
| 2511 | if (E->getOp() == AtomicExpr::Store) { |
| 2512 | assert(!Dest && "Store does not return a value"); |
| 2513 | llvm::LoadInst *LoadVal1 = CGF.Builder.CreateLoad(Val1); |
| 2514 | LoadVal1->setAlignment(Align); |
| 2515 | llvm::StoreInst *Store = CGF.Builder.CreateStore(LoadVal1, Ptr); |
| 2516 | Store->setAtomic(Order); |
| 2517 | Store->setAlignment(Size); |
| 2518 | Store->setVolatile(E->isVolatile()); |
| 2519 | return; |
| 2520 | } |
| 2521 | |
| 2522 | llvm::AtomicRMWInst::BinOp Op = llvm::AtomicRMWInst::Add; |
| 2523 | switch (E->getOp()) { |
| 2524 | case AtomicExpr::CmpXchgWeak: |
| 2525 | case AtomicExpr::CmpXchgStrong: |
| 2526 | case AtomicExpr::Store: |
| 2527 | case AtomicExpr::Load: assert(0 && "Already handled!"); |
| 2528 | case AtomicExpr::Add: Op = llvm::AtomicRMWInst::Add; break; |
| 2529 | case AtomicExpr::Sub: Op = llvm::AtomicRMWInst::Sub; break; |
| 2530 | case AtomicExpr::And: Op = llvm::AtomicRMWInst::And; break; |
| 2531 | case AtomicExpr::Or: Op = llvm::AtomicRMWInst::Or; break; |
| 2532 | case AtomicExpr::Xor: Op = llvm::AtomicRMWInst::Xor; break; |
| 2533 | case AtomicExpr::Xchg: Op = llvm::AtomicRMWInst::Xchg; break; |
| 2534 | } |
| 2535 | llvm::LoadInst *LoadVal1 = CGF.Builder.CreateLoad(Val1); |
| 2536 | LoadVal1->setAlignment(Align); |
| 2537 | llvm::AtomicRMWInst *RMWI = |
| 2538 | CGF.Builder.CreateAtomicRMW(Op, Ptr, LoadVal1, Order); |
| 2539 | RMWI->setVolatile(E->isVolatile()); |
| 2540 | llvm::StoreInst *StoreDest = CGF.Builder.CreateStore(RMWI, Dest); |
| 2541 | StoreDest->setAlignment(Align); |
| 2542 | } |
| 2543 | |
| 2544 | // This function emits any expression (scalar, complex, or aggregate) |
| 2545 | // into a temporary alloca. |
| 2546 | static llvm::Value * |
| 2547 | EmitValToTemp(CodeGenFunction &CGF, Expr *E) { |
| 2548 | llvm::Value *DeclPtr = CGF.CreateMemTemp(E->getType(), ".atomictmp"); |
| 2549 | CGF.EmitAnyExprToMem(E, DeclPtr, E->getType().getQualifiers(), |
| 2550 | /*Init*/ true); |
| 2551 | return DeclPtr; |
| 2552 | } |
| 2553 | |
| 2554 | static RValue ConvertTempToRValue(CodeGenFunction &CGF, QualType Ty, |
| 2555 | llvm::Value *Dest) { |
| 2556 | if (Ty->isAnyComplexType()) |
| 2557 | return RValue::getComplex(CGF.LoadComplexFromAddr(Dest, false)); |
| 2558 | if (CGF.hasAggregateLLVMType(Ty)) |
| 2559 | return RValue::getAggregate(Dest); |
| 2560 | return RValue::get(CGF.EmitLoadOfScalar(CGF.MakeAddrLValue(Dest, Ty))); |
| 2561 | } |
| 2562 | |
| 2563 | RValue CodeGenFunction::EmitAtomicExpr(AtomicExpr *E, llvm::Value *Dest) { |
| 2564 | QualType AtomicTy = E->getPtr()->getType()->getPointeeType(); |
| 2565 | QualType MemTy = AtomicTy->getAs<AtomicType>()->getValueType(); |
| 2566 | CharUnits sizeChars = getContext().getTypeSizeInChars(AtomicTy); |
| 2567 | uint64_t Size = sizeChars.getQuantity(); |
| 2568 | CharUnits alignChars = getContext().getTypeAlignInChars(AtomicTy); |
| 2569 | unsigned Align = alignChars.getQuantity(); |
Eli Friedman | 2be4607 | 2011-10-14 20:59:01 +0000 | [diff] [blame] | 2570 | unsigned MaxInlineWidth = |
| 2571 | getContext().getTargetInfo().getMaxAtomicInlineWidth(); |
| 2572 | bool UseLibcall = (Size != Align || Size > MaxInlineWidth); |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 2573 | |
| 2574 | llvm::Value *Ptr, *Order, *OrderFail = 0, *Val1 = 0, *Val2 = 0; |
| 2575 | Ptr = EmitScalarExpr(E->getPtr()); |
| 2576 | Order = EmitScalarExpr(E->getOrder()); |
| 2577 | if (E->isCmpXChg()) { |
| 2578 | Val1 = EmitScalarExpr(E->getVal1()); |
| 2579 | Val2 = EmitValToTemp(*this, E->getVal2()); |
| 2580 | OrderFail = EmitScalarExpr(E->getOrderFail()); |
| 2581 | (void)OrderFail; // OrderFail is unused at the moment |
| 2582 | } else if ((E->getOp() == AtomicExpr::Add || E->getOp() == AtomicExpr::Sub) && |
| 2583 | MemTy->isPointerType()) { |
| 2584 | // For pointers, we're required to do a bit of math: adding 1 to an int* |
| 2585 | // is not the same as adding 1 to a uintptr_t. |
| 2586 | QualType Val1Ty = E->getVal1()->getType(); |
| 2587 | llvm::Value *Val1Scalar = EmitScalarExpr(E->getVal1()); |
Eli Friedman | 2be4607 | 2011-10-14 20:59:01 +0000 | [diff] [blame] | 2588 | CharUnits PointeeIncAmt = |
| 2589 | getContext().getTypeSizeInChars(MemTy->getPointeeType()); |
| 2590 | Val1Scalar = Builder.CreateMul(Val1Scalar, CGM.getSize(PointeeIncAmt)); |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 2591 | Val1 = CreateMemTemp(Val1Ty, ".atomictmp"); |
| 2592 | EmitStoreOfScalar(Val1Scalar, MakeAddrLValue(Val1, Val1Ty)); |
| 2593 | } else if (E->getOp() != AtomicExpr::Load) { |
| 2594 | Val1 = EmitValToTemp(*this, E->getVal1()); |
| 2595 | } |
| 2596 | |
| 2597 | if (E->getOp() != AtomicExpr::Store && !Dest) |
| 2598 | Dest = CreateMemTemp(E->getType(), ".atomicdst"); |
| 2599 | |
| 2600 | if (UseLibcall) { |
| 2601 | // FIXME: Finalize what the libcalls are actually supposed to look like. |
| 2602 | // See also http://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary . |
| 2603 | return EmitUnsupportedRValue(E, "atomic library call"); |
| 2604 | } |
| 2605 | #if 0 |
| 2606 | if (UseLibcall) { |
| 2607 | const char* LibCallName; |
| 2608 | switch (E->getOp()) { |
| 2609 | case AtomicExpr::CmpXchgWeak: |
| 2610 | LibCallName = "__atomic_compare_exchange_generic"; break; |
| 2611 | case AtomicExpr::CmpXchgStrong: |
| 2612 | LibCallName = "__atomic_compare_exchange_generic"; break; |
| 2613 | case AtomicExpr::Add: LibCallName = "__atomic_fetch_add_generic"; break; |
| 2614 | case AtomicExpr::Sub: LibCallName = "__atomic_fetch_sub_generic"; break; |
| 2615 | case AtomicExpr::And: LibCallName = "__atomic_fetch_and_generic"; break; |
| 2616 | case AtomicExpr::Or: LibCallName = "__atomic_fetch_or_generic"; break; |
| 2617 | case AtomicExpr::Xor: LibCallName = "__atomic_fetch_xor_generic"; break; |
| 2618 | case AtomicExpr::Xchg: LibCallName = "__atomic_exchange_generic"; break; |
| 2619 | case AtomicExpr::Store: LibCallName = "__atomic_store_generic"; break; |
| 2620 | case AtomicExpr::Load: LibCallName = "__atomic_load_generic"; break; |
| 2621 | } |
| 2622 | llvm::SmallVector<QualType, 4> Params; |
| 2623 | CallArgList Args; |
| 2624 | QualType RetTy = getContext().VoidTy; |
| 2625 | if (E->getOp() != AtomicExpr::Store && !E->isCmpXChg()) |
| 2626 | Args.add(RValue::get(EmitCastToVoidPtr(Dest)), |
| 2627 | getContext().VoidPtrTy); |
| 2628 | Args.add(RValue::get(EmitCastToVoidPtr(Ptr)), |
| 2629 | getContext().VoidPtrTy); |
| 2630 | if (E->getOp() != AtomicExpr::Load) |
| 2631 | Args.add(RValue::get(EmitCastToVoidPtr(Val1)), |
| 2632 | getContext().VoidPtrTy); |
| 2633 | if (E->isCmpXChg()) { |
| 2634 | Args.add(RValue::get(EmitCastToVoidPtr(Val2)), |
| 2635 | getContext().VoidPtrTy); |
| 2636 | RetTy = getContext().IntTy; |
| 2637 | } |
| 2638 | Args.add(RValue::get(llvm::ConstantInt::get(SizeTy, Size)), |
| 2639 | getContext().getSizeType()); |
| 2640 | const CGFunctionInfo &FuncInfo = |
| 2641 | CGM.getTypes().getFunctionInfo(RetTy, Args, FunctionType::ExtInfo()); |
| 2642 | llvm::FunctionType *FTy = CGM.getTypes().GetFunctionType(FuncInfo, false); |
| 2643 | llvm::Constant *Func = CGM.CreateRuntimeFunction(FTy, LibCallName); |
| 2644 | RValue Res = EmitCall(FuncInfo, Func, ReturnValueSlot(), Args); |
| 2645 | if (E->isCmpXChg()) |
| 2646 | return Res; |
| 2647 | if (E->getOp() == AtomicExpr::Store) |
| 2648 | return RValue::get(0); |
| 2649 | return ConvertTempToRValue(*this, E->getType(), Dest); |
| 2650 | } |
| 2651 | #endif |
| 2652 | llvm::Type *IPtrTy = |
| 2653 | llvm::IntegerType::get(getLLVMContext(), Size * 8)->getPointerTo(); |
| 2654 | llvm::Value *OrigDest = Dest; |
| 2655 | Ptr = Builder.CreateBitCast(Ptr, IPtrTy); |
| 2656 | if (Val1) Val1 = Builder.CreateBitCast(Val1, IPtrTy); |
| 2657 | if (Val2) Val2 = Builder.CreateBitCast(Val2, IPtrTy); |
| 2658 | if (Dest && !E->isCmpXChg()) Dest = Builder.CreateBitCast(Dest, IPtrTy); |
| 2659 | |
| 2660 | if (isa<llvm::ConstantInt>(Order)) { |
| 2661 | int ord = cast<llvm::ConstantInt>(Order)->getZExtValue(); |
| 2662 | switch (ord) { |
| 2663 | case 0: // memory_order_relaxed |
| 2664 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2665 | llvm::Monotonic); |
| 2666 | break; |
| 2667 | case 1: // memory_order_consume |
| 2668 | case 2: // memory_order_acquire |
| 2669 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2670 | llvm::Acquire); |
| 2671 | break; |
| 2672 | case 3: // memory_order_release |
| 2673 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2674 | llvm::Release); |
| 2675 | break; |
| 2676 | case 4: // memory_order_acq_rel |
| 2677 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2678 | llvm::AcquireRelease); |
| 2679 | break; |
| 2680 | case 5: // memory_order_seq_cst |
| 2681 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2682 | llvm::SequentiallyConsistent); |
| 2683 | break; |
| 2684 | default: // invalid order |
| 2685 | // We should not ever get here normally, but it's hard to |
| 2686 | // enforce that in general. |
| 2687 | break; |
| 2688 | } |
| 2689 | if (E->getOp() == AtomicExpr::Store) |
| 2690 | return RValue::get(0); |
| 2691 | return ConvertTempToRValue(*this, E->getType(), OrigDest); |
| 2692 | } |
| 2693 | |
| 2694 | // Long case, when Order isn't obviously constant. |
| 2695 | |
| 2696 | // Create all the relevant BB's |
Eli Friedman | 9e3c20b | 2011-10-11 20:00:47 +0000 | [diff] [blame] | 2697 | llvm::BasicBlock *MonotonicBB = 0, *AcquireBB = 0, *ReleaseBB = 0, |
| 2698 | *AcqRelBB = 0, *SeqCstBB = 0; |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 2699 | MonotonicBB = createBasicBlock("monotonic", CurFn); |
| 2700 | if (E->getOp() != AtomicExpr::Store) |
| 2701 | AcquireBB = createBasicBlock("acquire", CurFn); |
| 2702 | if (E->getOp() != AtomicExpr::Load) |
| 2703 | ReleaseBB = createBasicBlock("release", CurFn); |
| 2704 | if (E->getOp() != AtomicExpr::Load && E->getOp() != AtomicExpr::Store) |
| 2705 | AcqRelBB = createBasicBlock("acqrel", CurFn); |
| 2706 | SeqCstBB = createBasicBlock("seqcst", CurFn); |
| 2707 | llvm::BasicBlock *ContBB = createBasicBlock("atomic.continue", CurFn); |
| 2708 | |
| 2709 | // Create the switch for the split |
| 2710 | // MonotonicBB is arbitrarily chosen as the default case; in practice, this |
| 2711 | // doesn't matter unless someone is crazy enough to use something that |
| 2712 | // doesn't fold to a constant for the ordering. |
| 2713 | Order = Builder.CreateIntCast(Order, Builder.getInt32Ty(), false); |
| 2714 | llvm::SwitchInst *SI = Builder.CreateSwitch(Order, MonotonicBB); |
| 2715 | |
| 2716 | // Emit all the different atomics |
| 2717 | Builder.SetInsertPoint(MonotonicBB); |
| 2718 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2719 | llvm::Monotonic); |
| 2720 | Builder.CreateBr(ContBB); |
| 2721 | if (E->getOp() != AtomicExpr::Store) { |
| 2722 | Builder.SetInsertPoint(AcquireBB); |
| 2723 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2724 | llvm::Acquire); |
| 2725 | Builder.CreateBr(ContBB); |
| 2726 | SI->addCase(Builder.getInt32(1), AcquireBB); |
| 2727 | SI->addCase(Builder.getInt32(2), AcquireBB); |
| 2728 | } |
| 2729 | if (E->getOp() != AtomicExpr::Load) { |
| 2730 | Builder.SetInsertPoint(ReleaseBB); |
| 2731 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2732 | llvm::Release); |
| 2733 | Builder.CreateBr(ContBB); |
| 2734 | SI->addCase(Builder.getInt32(3), ReleaseBB); |
| 2735 | } |
| 2736 | if (E->getOp() != AtomicExpr::Load && E->getOp() != AtomicExpr::Store) { |
| 2737 | Builder.SetInsertPoint(AcqRelBB); |
| 2738 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2739 | llvm::AcquireRelease); |
| 2740 | Builder.CreateBr(ContBB); |
| 2741 | SI->addCase(Builder.getInt32(4), AcqRelBB); |
| 2742 | } |
| 2743 | Builder.SetInsertPoint(SeqCstBB); |
| 2744 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2745 | llvm::SequentiallyConsistent); |
| 2746 | Builder.CreateBr(ContBB); |
| 2747 | SI->addCase(Builder.getInt32(5), SeqCstBB); |
| 2748 | |
| 2749 | // Cleanup and return |
| 2750 | Builder.SetInsertPoint(ContBB); |
| 2751 | if (E->getOp() == AtomicExpr::Store) |
| 2752 | return RValue::get(0); |
| 2753 | return ConvertTempToRValue(*this, E->getType(), OrigDest); |
| 2754 | } |
Peter Collingbourne | c5096cb | 2011-10-27 19:19:51 +0000 | [diff] [blame] | 2755 | |
| 2756 | void CodeGenFunction::SetFPAccuracy(llvm::Value *Val, unsigned AccuracyN, |
| 2757 | unsigned AccuracyD) { |
| 2758 | assert(Val->getType()->isFPOrFPVectorTy()); |
| 2759 | if (!AccuracyN || !isa<llvm::Instruction>(Val)) |
| 2760 | return; |
| 2761 | |
| 2762 | llvm::Value *Vals[2]; |
| 2763 | Vals[0] = llvm::ConstantInt::get(Int32Ty, AccuracyN); |
| 2764 | Vals[1] = llvm::ConstantInt::get(Int32Ty, AccuracyD); |
| 2765 | llvm::MDNode *Node = llvm::MDNode::get(getLLVMContext(), Vals); |
| 2766 | |
| 2767 | cast<llvm::Instruction>(Val)->setMetadata(llvm::LLVMContext::MD_fpaccuracy, |
| 2768 | Node); |
| 2769 | } |
John McCall | 4b9c2d2 | 2011-11-06 09:01:30 +0000 | [diff] [blame] | 2770 | |
| 2771 | namespace { |
| 2772 | struct LValueOrRValue { |
| 2773 | LValue LV; |
| 2774 | RValue RV; |
| 2775 | }; |
| 2776 | } |
| 2777 | |
| 2778 | static LValueOrRValue emitPseudoObjectExpr(CodeGenFunction &CGF, |
| 2779 | const PseudoObjectExpr *E, |
| 2780 | bool forLValue, |
| 2781 | AggValueSlot slot) { |
| 2782 | llvm::SmallVector<CodeGenFunction::OpaqueValueMappingData, 4> opaques; |
| 2783 | |
| 2784 | // Find the result expression, if any. |
| 2785 | const Expr *resultExpr = E->getResultExpr(); |
| 2786 | LValueOrRValue result; |
| 2787 | |
| 2788 | for (PseudoObjectExpr::const_semantics_iterator |
| 2789 | i = E->semantics_begin(), e = E->semantics_end(); i != e; ++i) { |
| 2790 | const Expr *semantic = *i; |
| 2791 | |
| 2792 | // If this semantic expression is an opaque value, bind it |
| 2793 | // to the result of its source expression. |
| 2794 | if (const OpaqueValueExpr *ov = dyn_cast<OpaqueValueExpr>(semantic)) { |
| 2795 | |
| 2796 | // If this is the result expression, we may need to evaluate |
| 2797 | // directly into the slot. |
| 2798 | typedef CodeGenFunction::OpaqueValueMappingData OVMA; |
| 2799 | OVMA opaqueData; |
| 2800 | if (ov == resultExpr && ov->isRValue() && !forLValue && |
| 2801 | CodeGenFunction::hasAggregateLLVMType(ov->getType()) && |
| 2802 | !ov->getType()->isAnyComplexType()) { |
| 2803 | CGF.EmitAggExpr(ov->getSourceExpr(), slot); |
| 2804 | |
| 2805 | LValue LV = CGF.MakeAddrLValue(slot.getAddr(), ov->getType()); |
| 2806 | opaqueData = OVMA::bind(CGF, ov, LV); |
| 2807 | result.RV = slot.asRValue(); |
| 2808 | |
| 2809 | // Otherwise, emit as normal. |
| 2810 | } else { |
| 2811 | opaqueData = OVMA::bind(CGF, ov, ov->getSourceExpr()); |
| 2812 | |
| 2813 | // If this is the result, also evaluate the result now. |
| 2814 | if (ov == resultExpr) { |
| 2815 | if (forLValue) |
| 2816 | result.LV = CGF.EmitLValue(ov); |
| 2817 | else |
| 2818 | result.RV = CGF.EmitAnyExpr(ov, slot); |
| 2819 | } |
| 2820 | } |
| 2821 | |
| 2822 | opaques.push_back(opaqueData); |
| 2823 | |
| 2824 | // Otherwise, if the expression is the result, evaluate it |
| 2825 | // and remember the result. |
| 2826 | } else if (semantic == resultExpr) { |
| 2827 | if (forLValue) |
| 2828 | result.LV = CGF.EmitLValue(semantic); |
| 2829 | else |
| 2830 | result.RV = CGF.EmitAnyExpr(semantic, slot); |
| 2831 | |
| 2832 | // Otherwise, evaluate the expression in an ignored context. |
| 2833 | } else { |
| 2834 | CGF.EmitIgnoredExpr(semantic); |
| 2835 | } |
| 2836 | } |
| 2837 | |
| 2838 | // Unbind all the opaques now. |
| 2839 | for (unsigned i = 0, e = opaques.size(); i != e; ++i) |
| 2840 | opaques[i].unbind(CGF); |
| 2841 | |
| 2842 | return result; |
| 2843 | } |
| 2844 | |
| 2845 | RValue CodeGenFunction::EmitPseudoObjectRValue(const PseudoObjectExpr *E, |
| 2846 | AggValueSlot slot) { |
| 2847 | return emitPseudoObjectExpr(*this, E, false, slot).RV; |
| 2848 | } |
| 2849 | |
| 2850 | LValue CodeGenFunction::EmitPseudoObjectLValue(const PseudoObjectExpr *E) { |
| 2851 | return emitPseudoObjectExpr(*this, E, true, AggValueSlot::ignored()).LV; |
| 2852 | } |