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 | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 232 | if (const ExprWithCleanups *TE = dyn_cast<ExprWithCleanups>(E)) { |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 233 | CodeGenFunction::RunCleanupsScope Scope(CGF); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 234 | |
| 235 | return EmitExprForReferenceBinding(CGF, TE->getSubExpr(), |
| 236 | ReferenceTemporary, |
| 237 | ReferenceTemporaryDtor, |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 238 | ObjCARCReferenceLifetimeType, |
Anders Carlsson | 656746c | 2010-06-27 17:23:46 +0000 | [diff] [blame] | 239 | InitializedDecl); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | RValue RV; |
Douglas Gregor | da29e09 | 2011-01-22 02:44:21 +0000 | [diff] [blame] | 243 | if (E->isGLValue()) { |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 244 | // Emit the expression as an lvalue. |
| 245 | LValue LV = CGF.EmitLValue(E); |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 246 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 247 | if (LV.isSimple()) |
| 248 | return LV.getAddress(); |
Anders Carlsson | 0dc7366 | 2010-02-04 17:32:58 +0000 | [diff] [blame] | 249 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 250 | // We have to load the lvalue. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 251 | RV = CGF.EmitLoadOfLValue(LV); |
Eli Friedman | 5df0d42 | 2009-05-20 02:31:19 +0000 | [diff] [blame] | 252 | } else { |
Douglas Gregor | d7b2316 | 2011-06-22 16:12:01 +0000 | [diff] [blame] | 253 | if (!ObjCARCReferenceLifetimeType.isNull()) { |
| 254 | ReferenceTemporary = CreateReferenceTemporary(CGF, |
| 255 | ObjCARCReferenceLifetimeType, |
| 256 | InitializedDecl); |
| 257 | |
| 258 | |
| 259 | LValue RefTempDst = CGF.MakeAddrLValue(ReferenceTemporary, |
| 260 | ObjCARCReferenceLifetimeType); |
| 261 | |
| 262 | CGF.EmitScalarInit(E, dyn_cast_or_null<ValueDecl>(InitializedDecl), |
| 263 | RefTempDst, false); |
| 264 | |
| 265 | bool ExtendsLifeOfTemporary = false; |
| 266 | if (const VarDecl *Var = dyn_cast_or_null<VarDecl>(InitializedDecl)) { |
| 267 | if (Var->extendsLifetimeOfTemporary()) |
| 268 | ExtendsLifeOfTemporary = true; |
| 269 | } else if (InitializedDecl && isa<FieldDecl>(InitializedDecl)) { |
| 270 | ExtendsLifeOfTemporary = true; |
| 271 | } |
| 272 | |
| 273 | if (!ExtendsLifeOfTemporary) { |
| 274 | // Since the lifetime of this temporary isn't going to be extended, |
| 275 | // we need to clean it up ourselves at the end of the full expression. |
| 276 | switch (ObjCARCReferenceLifetimeType.getObjCLifetime()) { |
| 277 | case Qualifiers::OCL_None: |
| 278 | case Qualifiers::OCL_ExplicitNone: |
| 279 | case Qualifiers::OCL_Autoreleasing: |
| 280 | break; |
| 281 | |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 282 | case Qualifiers::OCL_Strong: { |
| 283 | assert(!ObjCARCReferenceLifetimeType->isArrayType()); |
| 284 | CleanupKind cleanupKind = CGF.getARCCleanupKind(); |
| 285 | CGF.pushDestroy(cleanupKind, |
| 286 | ReferenceTemporary, |
| 287 | ObjCARCReferenceLifetimeType, |
| 288 | CodeGenFunction::destroyARCStrongImprecise, |
| 289 | cleanupKind & EHCleanup); |
Douglas Gregor | d7b2316 | 2011-06-22 16:12:01 +0000 | [diff] [blame] | 290 | break; |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 291 | } |
Douglas Gregor | d7b2316 | 2011-06-22 16:12:01 +0000 | [diff] [blame] | 292 | |
| 293 | case Qualifiers::OCL_Weak: |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 294 | assert(!ObjCARCReferenceLifetimeType->isArrayType()); |
| 295 | CGF.pushDestroy(NormalAndEHCleanup, |
| 296 | ReferenceTemporary, |
| 297 | ObjCARCReferenceLifetimeType, |
| 298 | CodeGenFunction::destroyARCWeak, |
| 299 | /*useEHCleanupForArray*/ true); |
Douglas Gregor | d7b2316 | 2011-06-22 16:12:01 +0000 | [diff] [blame] | 300 | break; |
| 301 | } |
| 302 | |
| 303 | ObjCARCReferenceLifetimeType = QualType(); |
| 304 | } |
| 305 | |
| 306 | return ReferenceTemporary; |
| 307 | } |
| 308 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 309 | SmallVector<SubobjectAdjustment, 2> Adjustments; |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 310 | while (true) { |
Peter Collingbourne | f111d93 | 2011-04-15 00:35:48 +0000 | [diff] [blame] | 311 | E = E->IgnoreParens(); |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 312 | |
| 313 | if (const CastExpr *CE = dyn_cast<CastExpr>(E)) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 314 | if ((CE->getCastKind() == CK_DerivedToBase || |
| 315 | CE->getCastKind() == CK_UncheckedDerivedToBase) && |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 316 | E->getType()->isRecordType()) { |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 317 | E = CE->getSubExpr(); |
| 318 | CXXRecordDecl *Derived |
| 319 | = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl()); |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 320 | Adjustments.push_back(SubobjectAdjustment(CE, Derived)); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 321 | continue; |
| 322 | } |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 323 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 324 | if (CE->getCastKind() == CK_NoOp) { |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 325 | E = CE->getSubExpr(); |
| 326 | continue; |
| 327 | } |
| 328 | } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { |
John McCall | 7eb0a9e | 2010-11-24 05:12:34 +0000 | [diff] [blame] | 329 | if (!ME->isArrow() && ME->getBase()->isRValue()) { |
| 330 | assert(ME->getBase()->getType()->isRecordType()); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 331 | if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) { |
| 332 | E = ME->getBase(); |
Daniel Dunbar | 333d42d | 2010-08-21 03:37:02 +0000 | [diff] [blame] | 333 | Adjustments.push_back(SubobjectAdjustment(Field)); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 334 | continue; |
| 335 | } |
| 336 | } |
Anders Carlsson | b3f7442 | 2009-10-15 00:51:46 +0000 | [diff] [blame] | 337 | } |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 338 | |
John McCall | 7cc25fe | 2011-02-21 05:25:38 +0000 | [diff] [blame] | 339 | if (const OpaqueValueExpr *opaque = dyn_cast<OpaqueValueExpr>(E)) |
| 340 | if (opaque->getType()->isRecordType()) |
| 341 | return CGF.EmitOpaqueValueLValue(opaque).getAddress(); |
| 342 | |
Douglas Gregor | 2d6b0e9 | 2010-05-22 05:17:18 +0000 | [diff] [blame] | 343 | // Nothing changed. |
| 344 | break; |
Anders Carlsson | 8478ce6 | 2009-08-16 17:50:25 +0000 | [diff] [blame] | 345 | } |
Anders Carlsson | b3f7442 | 2009-10-15 00:51:46 +0000 | [diff] [blame] | 346 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 347 | // Create a reference temporary if necessary. |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 348 | AggValueSlot AggSlot = AggValueSlot::ignored(); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 349 | if (CGF.hasAggregateLLVMType(E->getType()) && |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 350 | !E->getType()->isAnyComplexType()) { |
Anders Carlsson | 656746c | 2010-06-27 17:23:46 +0000 | [diff] [blame] | 351 | ReferenceTemporary = CreateReferenceTemporary(CGF, E->getType(), |
| 352 | InitializedDecl); |
John McCall | 7c2349b | 2011-08-25 20:40:09 +0000 | [diff] [blame] | 353 | AggValueSlot::IsDestructed_t isDestructed |
| 354 | = AggValueSlot::IsDestructed_t(InitializedDecl != 0); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 355 | AggSlot = AggValueSlot::forAddr(ReferenceTemporary, Qualifiers(), |
John McCall | 7c2349b | 2011-08-25 20:40:09 +0000 | [diff] [blame] | 356 | isDestructed, |
John McCall | 410ffb2 | 2011-08-25 23:04:34 +0000 | [diff] [blame] | 357 | AggValueSlot::DoesNotNeedGCBarriers, |
| 358 | AggValueSlot::IsNotAliased); |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 359 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 360 | |
Anders Carlsson | 656746c | 2010-06-27 17:23:46 +0000 | [diff] [blame] | 361 | if (InitializedDecl) { |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 362 | // Get the destructor for the reference temporary. |
| 363 | if (const RecordType *RT = E->getType()->getAs<RecordType>()) { |
| 364 | CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(RT->getDecl()); |
| 365 | if (!ClassDecl->hasTrivialDestructor()) |
Douglas Gregor | 1d110e0 | 2010-07-01 14:13:13 +0000 | [diff] [blame] | 366 | ReferenceTemporaryDtor = ClassDecl->getDestructor(); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 367 | } |
| 368 | } |
| 369 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 370 | RV = CGF.EmitAnyExpr(E, AggSlot); |
| 371 | |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 372 | // Check if need to perform derived-to-base casts and/or field accesses, to |
| 373 | // get from the temporary object we created (and, potentially, for which we |
| 374 | // extended the lifetime) to the subobject we're binding the reference to. |
| 375 | if (!Adjustments.empty()) { |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 376 | llvm::Value *Object = RV.getAggregateAddr(); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 377 | for (unsigned I = Adjustments.size(); I != 0; --I) { |
| 378 | SubobjectAdjustment &Adjustment = Adjustments[I-1]; |
| 379 | switch (Adjustment.Kind) { |
| 380 | case SubobjectAdjustment::DerivedToBaseAdjustment: |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 381 | Object = |
| 382 | CGF.GetAddressOfBaseClass(Object, |
| 383 | Adjustment.DerivedToBase.DerivedClass, |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 384 | Adjustment.DerivedToBase.BasePath->path_begin(), |
| 385 | Adjustment.DerivedToBase.BasePath->path_end(), |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 386 | /*NullCheckValue=*/false); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 387 | break; |
| 388 | |
| 389 | case SubobjectAdjustment::FieldAdjustment: { |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 390 | LValue LV = |
Daniel Dunbar | 333d42d | 2010-08-21 03:37:02 +0000 | [diff] [blame] | 391 | CGF.EmitLValueForField(Object, Adjustment.Field, 0); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 392 | if (LV.isSimple()) { |
| 393 | Object = LV.getAddress(); |
| 394 | break; |
| 395 | } |
| 396 | |
| 397 | // For non-simple lvalues, we actually have to create a copy of |
| 398 | // the object we're binding to. |
Daniel Dunbar | 333d42d | 2010-08-21 03:37:02 +0000 | [diff] [blame] | 399 | QualType T = Adjustment.Field->getType().getNonReferenceType() |
| 400 | .getUnqualifiedType(); |
Anders Carlsson | 045a6d8 | 2010-06-27 17:52:15 +0000 | [diff] [blame] | 401 | Object = CreateReferenceTemporary(CGF, T, InitializedDecl); |
Daniel Dunbar | 333d42d | 2010-08-21 03:37:02 +0000 | [diff] [blame] | 402 | LValue TempLV = CGF.MakeAddrLValue(Object, |
| 403 | Adjustment.Field->getType()); |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 404 | CGF.EmitStoreThroughLValue(CGF.EmitLoadOfLValue(LV), TempLV); |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 405 | break; |
| 406 | } |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 407 | |
Douglas Gregor | 60dcb84 | 2010-05-20 08:36:28 +0000 | [diff] [blame] | 408 | } |
| 409 | } |
Eli Friedman | 545aa7a | 2011-03-16 22:34:09 +0000 | [diff] [blame] | 410 | |
| 411 | return Object; |
Anders Carlsson | b3f7442 | 2009-10-15 00:51:46 +0000 | [diff] [blame] | 412 | } |
Anders Carlsson | 4bbab92 | 2009-05-20 00:36:58 +0000 | [diff] [blame] | 413 | } |
Eli Friedman | 5df0d42 | 2009-05-20 02:31:19 +0000 | [diff] [blame] | 414 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 415 | if (RV.isAggregate()) |
| 416 | return RV.getAggregateAddr(); |
Eli Friedman | 5df0d42 | 2009-05-20 02:31:19 +0000 | [diff] [blame] | 417 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 418 | // Create a temporary variable that we can bind the reference to. |
Anders Carlsson | 656746c | 2010-06-27 17:23:46 +0000 | [diff] [blame] | 419 | ReferenceTemporary = CreateReferenceTemporary(CGF, E->getType(), |
| 420 | InitializedDecl); |
| 421 | |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 422 | |
| 423 | unsigned Alignment = |
| 424 | CGF.getContext().getTypeAlignInChars(E->getType()).getQuantity(); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 425 | if (RV.isScalar()) |
| 426 | CGF.EmitStoreOfScalar(RV.getScalarVal(), ReferenceTemporary, |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 427 | /*Volatile=*/false, Alignment, E->getType()); |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 428 | else |
| 429 | CGF.StoreComplexToAddr(RV.getComplexVal(), ReferenceTemporary, |
| 430 | /*Volatile=*/false); |
| 431 | return ReferenceTemporary; |
| 432 | } |
| 433 | |
| 434 | RValue |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 435 | CodeGenFunction::EmitReferenceBindingToExpr(const Expr *E, |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 436 | const NamedDecl *InitializedDecl) { |
| 437 | llvm::Value *ReferenceTemporary = 0; |
| 438 | const CXXDestructorDecl *ReferenceTemporaryDtor = 0; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 439 | QualType ObjCARCReferenceLifetimeType; |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 440 | llvm::Value *Value = EmitExprForReferenceBinding(*this, E, ReferenceTemporary, |
| 441 | ReferenceTemporaryDtor, |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 442 | ObjCARCReferenceLifetimeType, |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 443 | InitializedDecl); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 444 | if (!ReferenceTemporaryDtor && ObjCARCReferenceLifetimeType.isNull()) |
Anders Carlsson | 045a6d8 | 2010-06-27 17:52:15 +0000 | [diff] [blame] | 445 | return RValue::get(Value); |
| 446 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 447 | // Make sure to call the destructor for the reference temporary. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 448 | const VarDecl *VD = dyn_cast_or_null<VarDecl>(InitializedDecl); |
| 449 | if (VD && VD->hasGlobalStorage()) { |
| 450 | if (ReferenceTemporaryDtor) { |
Anders Carlsson | 045a6d8 | 2010-06-27 17:52:15 +0000 | [diff] [blame] | 451 | llvm::Constant *DtorFn = |
| 452 | CGM.GetAddrOfCXXDestructor(ReferenceTemporaryDtor, Dtor_Complete); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 453 | EmitCXXGlobalDtorRegistration(DtorFn, |
| 454 | cast<llvm::Constant>(ReferenceTemporary)); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 455 | } else { |
| 456 | assert(!ObjCARCReferenceLifetimeType.isNull()); |
| 457 | // Note: We intentionally do not register a global "destructor" to |
| 458 | // release the object. |
Anders Carlsson | 045a6d8 | 2010-06-27 17:52:15 +0000 | [diff] [blame] | 459 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 460 | |
| 461 | return RValue::get(Value); |
Anders Carlsson | 045a6d8 | 2010-06-27 17:52:15 +0000 | [diff] [blame] | 462 | } |
John McCall | 81407d4 | 2010-07-21 06:29:51 +0000 | [diff] [blame] | 463 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 464 | if (ReferenceTemporaryDtor) |
| 465 | PushDestructorCleanup(ReferenceTemporaryDtor, ReferenceTemporary); |
| 466 | else { |
| 467 | switch (ObjCARCReferenceLifetimeType.getObjCLifetime()) { |
| 468 | case Qualifiers::OCL_None: |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 469 | llvm_unreachable( |
| 470 | "Not a reference temporary that needs to be deallocated"); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 471 | case Qualifiers::OCL_ExplicitNone: |
| 472 | case Qualifiers::OCL_Autoreleasing: |
| 473 | // Nothing to do. |
| 474 | break; |
| 475 | |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 476 | case Qualifiers::OCL_Strong: { |
| 477 | bool precise = VD && VD->hasAttr<ObjCPreciseLifetimeAttr>(); |
| 478 | CleanupKind cleanupKind = getARCCleanupKind(); |
Benjamin Kramer | 0d51676 | 2011-07-12 18:37:23 +0000 | [diff] [blame] | 479 | // This local is a GCC and MSVC compiler workaround. |
| 480 | Destroyer *destroyer = precise ? &destroyARCStrongPrecise : |
| 481 | &destroyARCStrongImprecise; |
| 482 | pushDestroy(cleanupKind, ReferenceTemporary, ObjCARCReferenceLifetimeType, |
| 483 | *destroyer, cleanupKind & EHCleanup); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 484 | break; |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 485 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 486 | |
Benjamin Kramer | 0d51676 | 2011-07-12 18:37:23 +0000 | [diff] [blame] | 487 | case Qualifiers::OCL_Weak: { |
| 488 | // This local is a GCC and MSVC compiler workaround. |
| 489 | Destroyer *destroyer = &destroyARCWeak; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 490 | // __weak objects always get EH cleanups; otherwise, exceptions |
| 491 | // could cause really nasty crashes instead of mere leaks. |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 492 | pushDestroy(NormalAndEHCleanup, ReferenceTemporary, |
Benjamin Kramer | 0d51676 | 2011-07-12 18:37:23 +0000 | [diff] [blame] | 493 | ObjCARCReferenceLifetimeType, *destroyer, true); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 494 | break; |
| 495 | } |
Benjamin Kramer | 0d51676 | 2011-07-12 18:37:23 +0000 | [diff] [blame] | 496 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 497 | } |
| 498 | |
Anders Carlsson | dca7ab2 | 2010-06-27 16:56:04 +0000 | [diff] [blame] | 499 | return RValue::get(Value); |
Anders Carlsson | 4029ca7 | 2009-05-20 00:24:07 +0000 | [diff] [blame] | 500 | } |
| 501 | |
| 502 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 503 | /// getAccessedFieldNo - Given an encoded value and a result number, return the |
| 504 | /// input field number being accessed. |
| 505 | unsigned CodeGenFunction::getAccessedFieldNo(unsigned Idx, |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 506 | const llvm::Constant *Elts) { |
| 507 | if (isa<llvm::ConstantAggregateZero>(Elts)) |
| 508 | return 0; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 509 | |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 510 | return cast<llvm::ConstantInt>(Elts->getOperand(Idx))->getZExtValue(); |
| 511 | } |
| 512 | |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 513 | void CodeGenFunction::EmitCheck(llvm::Value *Address, unsigned Size) { |
| 514 | if (!CatchUndefined) |
| 515 | return; |
| 516 | |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 517 | // This needs to be to the standard address space. |
| 518 | Address = Builder.CreateBitCast(Address, Int8PtrTy); |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 519 | |
Benjamin Kramer | 8dd55a3 | 2011-07-14 17:45:50 +0000 | [diff] [blame] | 520 | llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::objectsize, IntPtrTy); |
Chris Lattner | c24b9c4 | 2010-04-10 18:34:14 +0000 | [diff] [blame] | 521 | |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 522 | // 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] | 523 | llvm::Value *Arg = Builder.getFalse(); |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 524 | llvm::Value *C = Builder.CreateCall2(F, Address, Arg); |
| 525 | llvm::BasicBlock *Cont = createBasicBlock(); |
| 526 | llvm::BasicBlock *Check = createBasicBlock(); |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 527 | llvm::Value *NegativeOne = llvm::ConstantInt::get(IntPtrTy, -1ULL); |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 528 | Builder.CreateCondBr(Builder.CreateICmpEQ(C, NegativeOne), Cont, Check); |
| 529 | |
| 530 | EmitBlock(Check); |
| 531 | Builder.CreateCondBr(Builder.CreateICmpUGE(C, |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 532 | llvm::ConstantInt::get(IntPtrTy, Size)), |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 533 | Cont, getTrapBB()); |
| 534 | EmitBlock(Cont); |
| 535 | } |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 536 | |
Chris Lattner | dd36d32 | 2010-01-09 21:40:03 +0000 | [diff] [blame] | 537 | |
Chris Lattner | dd36d32 | 2010-01-09 21:40:03 +0000 | [diff] [blame] | 538 | CodeGenFunction::ComplexPairTy CodeGenFunction:: |
| 539 | EmitComplexPrePostIncDec(const UnaryOperator *E, LValue LV, |
| 540 | bool isInc, bool isPre) { |
| 541 | ComplexPairTy InVal = LoadComplexFromAddr(LV.getAddress(), |
| 542 | LV.isVolatileQualified()); |
| 543 | |
| 544 | llvm::Value *NextVal; |
| 545 | if (isa<llvm::IntegerType>(InVal.first->getType())) { |
| 546 | uint64_t AmountVal = isInc ? 1 : -1; |
| 547 | NextVal = llvm::ConstantInt::get(InVal.first->getType(), AmountVal, true); |
| 548 | |
| 549 | // Add the inc/dec to the real part. |
| 550 | NextVal = Builder.CreateAdd(InVal.first, NextVal, isInc ? "inc" : "dec"); |
| 551 | } else { |
| 552 | QualType ElemTy = E->getType()->getAs<ComplexType>()->getElementType(); |
| 553 | llvm::APFloat FVal(getContext().getFloatTypeSemantics(ElemTy), 1); |
| 554 | if (!isInc) |
| 555 | FVal.changeSign(); |
| 556 | NextVal = llvm::ConstantFP::get(getLLVMContext(), FVal); |
| 557 | |
| 558 | // Add the inc/dec to the real part. |
| 559 | NextVal = Builder.CreateFAdd(InVal.first, NextVal, isInc ? "inc" : "dec"); |
| 560 | } |
| 561 | |
| 562 | ComplexPairTy IncVal(NextVal, InVal.second); |
| 563 | |
| 564 | // Store the updated result through the lvalue. |
| 565 | StoreComplexToAddr(IncVal, LV.getAddress(), LV.isVolatileQualified()); |
| 566 | |
| 567 | // If this is a postinc, return the value read from memory, otherwise use the |
| 568 | // updated value. |
| 569 | return isPre ? IncVal : InVal; |
| 570 | } |
| 571 | |
| 572 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 573 | //===----------------------------------------------------------------------===// |
| 574 | // LValue Expression Emission |
| 575 | //===----------------------------------------------------------------------===// |
| 576 | |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 577 | RValue CodeGenFunction::GetUndefRValue(QualType Ty) { |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 578 | if (Ty->isVoidType()) |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 579 | return RValue::get(0); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 580 | |
| 581 | if (const ComplexType *CTy = Ty->getAs<ComplexType>()) { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 582 | llvm::Type *EltTy = ConvertType(CTy->getElementType()); |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 583 | llvm::Value *U = llvm::UndefValue::get(EltTy); |
Daniel Dunbar | 8fa73ed | 2009-01-09 20:09:28 +0000 | [diff] [blame] | 584 | return RValue::getComplex(std::make_pair(U, U)); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 585 | } |
| 586 | |
Chris Lattner | b6c504b | 2010-08-23 05:26:13 +0000 | [diff] [blame] | 587 | // If this is a use of an undefined aggregate type, the aggregate must have an |
| 588 | // identifiable address. Just because the contents of the value are undefined |
| 589 | // doesn't mean that the address can't be taken and compared. |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 590 | if (hasAggregateLLVMType(Ty)) { |
Chris Lattner | b6c504b | 2010-08-23 05:26:13 +0000 | [diff] [blame] | 591 | llvm::Value *DestPtr = CreateMemTemp(Ty, "undef.agg.tmp"); |
| 592 | return RValue::getAggregate(DestPtr); |
Daniel Dunbar | 8fa73ed | 2009-01-09 20:09:28 +0000 | [diff] [blame] | 593 | } |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 594 | |
| 595 | return RValue::get(llvm::UndefValue::get(ConvertType(Ty))); |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 596 | } |
| 597 | |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 598 | RValue CodeGenFunction::EmitUnsupportedRValue(const Expr *E, |
| 599 | const char *Name) { |
| 600 | ErrorUnsupported(E, Name); |
| 601 | return GetUndefRValue(E->getType()); |
| 602 | } |
| 603 | |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 604 | LValue CodeGenFunction::EmitUnsupportedLValue(const Expr *E, |
| 605 | const char *Name) { |
| 606 | ErrorUnsupported(E, Name); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 607 | llvm::Type *Ty = llvm::PointerType::getUnqual(ConvertType(E->getType())); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 608 | return MakeAddrLValue(llvm::UndefValue::get(Ty), E->getType()); |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 609 | } |
| 610 | |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 611 | LValue CodeGenFunction::EmitCheckedLValue(const Expr *E) { |
| 612 | LValue LV = EmitLValue(E); |
Daniel Dunbar | f0fe5bc | 2010-04-05 21:36:35 +0000 | [diff] [blame] | 613 | if (!isa<DeclRefExpr>(E) && !LV.isBitField() && LV.isSimple()) |
Ken Dyck | fe71008 | 2011-01-19 01:58:38 +0000 | [diff] [blame] | 614 | EmitCheck(LV.getAddress(), |
| 615 | getContext().getTypeSizeInChars(E->getType()).getQuantity()); |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 616 | return LV; |
| 617 | } |
| 618 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 619 | /// EmitLValue - Emit code to compute a designator that specifies the location |
| 620 | /// of the expression. |
| 621 | /// |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 622 | /// This can return one of two things: a simple address or a bitfield reference. |
| 623 | /// In either case, the LLVM Value* in the LValue structure is guaranteed to be |
| 624 | /// an LLVM pointer type. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 625 | /// |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 626 | /// If this returns a bitfield reference, nothing about the pointee type of the |
| 627 | /// 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] | 628 | /// |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 629 | /// If this returns a normal address, and if the lvalue's C type is fixed size, |
| 630 | /// this method guarantees that the returned pointer type will point to an LLVM |
| 631 | /// type of the same size of the lvalue's type. If the lvalue has a variable |
| 632 | /// length type, this is not possible. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 633 | /// |
| 634 | LValue CodeGenFunction::EmitLValue(const Expr *E) { |
| 635 | switch (E->getStmtClass()) { |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 636 | default: return EmitUnsupportedLValue(E, "l-value expression"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 637 | |
John McCall | db45806 | 2011-11-07 03:59:57 +0000 | [diff] [blame^] | 638 | case Expr::ObjCPropertyRefExprClass: |
| 639 | llvm_unreachable("cannot emit a property reference directly"); |
| 640 | |
Fariborz Jahanian | 03b2960 | 2010-06-17 19:56:20 +0000 | [diff] [blame] | 641 | case Expr::ObjCSelectorExprClass: |
| 642 | return EmitObjCSelectorLValue(cast<ObjCSelectorExpr>(E)); |
Fariborz Jahanian | 820bca4 | 2009-12-09 23:35:29 +0000 | [diff] [blame] | 643 | case Expr::ObjCIsaExprClass: |
| 644 | return EmitObjCIsaExpr(cast<ObjCIsaExpr>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 645 | case Expr::BinaryOperatorClass: |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 646 | return EmitBinaryOperatorLValue(cast<BinaryOperator>(E)); |
Douglas Gregor | 6a03e34 | 2010-04-23 04:16:32 +0000 | [diff] [blame] | 647 | case Expr::CompoundAssignOperatorClass: |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 648 | if (!E->getType()->isAnyComplexType()) |
| 649 | return EmitCompoundAssignmentLValue(cast<CompoundAssignOperator>(E)); |
| 650 | return EmitComplexCompoundAssignmentLValue(cast<CompoundAssignOperator>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 651 | case Expr::CallExprClass: |
Anders Carlsson | faf8664 | 2009-09-01 21:18:52 +0000 | [diff] [blame] | 652 | case Expr::CXXMemberCallExprClass: |
Douglas Gregor | b460980 | 2008-11-14 16:09:21 +0000 | [diff] [blame] | 653 | case Expr::CXXOperatorCallExprClass: |
| 654 | return EmitCallExprLValue(cast<CallExpr>(E)); |
Daniel Dunbar | 5b5c9ef | 2009-02-11 20:59:32 +0000 | [diff] [blame] | 655 | case Expr::VAArgExprClass: |
| 656 | return EmitVAArgExprLValue(cast<VAArgExpr>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 657 | case Expr::DeclRefExprClass: |
Douglas Gregor | 1a49af9 | 2009-01-06 05:10:23 +0000 | [diff] [blame] | 658 | return EmitDeclRefLValue(cast<DeclRefExpr>(E)); |
Eric Christopher | 6aff47d | 2011-09-08 17:15:04 +0000 | [diff] [blame] | 659 | case Expr::ParenExprClass: |
| 660 | return EmitLValue(cast<ParenExpr>(E)->getSubExpr()); |
Peter Collingbourne | f111d93 | 2011-04-15 00:35:48 +0000 | [diff] [blame] | 661 | case Expr::GenericSelectionExprClass: |
| 662 | return EmitLValue(cast<GenericSelectionExpr>(E)->getResultExpr()); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 663 | case Expr::PredefinedExprClass: |
| 664 | return EmitPredefinedLValue(cast<PredefinedExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 665 | case Expr::StringLiteralClass: |
| 666 | return EmitStringLiteralLValue(cast<StringLiteral>(E)); |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 667 | case Expr::ObjCEncodeExprClass: |
| 668 | return EmitObjCEncodeExprLValue(cast<ObjCEncodeExpr>(E)); |
John McCall | 4b9c2d2 | 2011-11-06 09:01:30 +0000 | [diff] [blame] | 669 | case Expr::PseudoObjectExprClass: |
| 670 | return EmitPseudoObjectLValue(cast<PseudoObjectExpr>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 671 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 672 | case Expr::BlockDeclRefExprClass: |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 673 | return EmitBlockDeclRefLValue(cast<BlockDeclRefExpr>(E)); |
| 674 | |
Anders Carlsson | b58d017 | 2009-05-30 23:23:33 +0000 | [diff] [blame] | 675 | case Expr::CXXTemporaryObjectExprClass: |
| 676 | case Expr::CXXConstructExprClass: |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 677 | return EmitCXXConstructLValue(cast<CXXConstructExpr>(E)); |
| 678 | case Expr::CXXBindTemporaryExprClass: |
| 679 | return EmitCXXBindTemporaryLValue(cast<CXXBindTemporaryExpr>(E)); |
John McCall | 4765fa0 | 2010-12-06 08:20:24 +0000 | [diff] [blame] | 680 | case Expr::ExprWithCleanupsClass: |
| 681 | return EmitExprWithCleanupsLValue(cast<ExprWithCleanups>(E)); |
Douglas Gregor | ed8abf1 | 2010-07-08 06:14:04 +0000 | [diff] [blame] | 682 | case Expr::CXXScalarValueInitExprClass: |
| 683 | return EmitNullInitializationLValue(cast<CXXScalarValueInitExpr>(E)); |
Anders Carlsson | 370e538 | 2009-11-14 01:51:50 +0000 | [diff] [blame] | 684 | case Expr::CXXDefaultArgExprClass: |
| 685 | return EmitLValue(cast<CXXDefaultArgExpr>(E)->getExpr()); |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 686 | case Expr::CXXTypeidExprClass: |
| 687 | return EmitCXXTypeidLValue(cast<CXXTypeidExpr>(E)); |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 688 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 689 | case Expr::ObjCMessageExprClass: |
| 690 | return EmitObjCMessageExprLValue(cast<ObjCMessageExpr>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 691 | case Expr::ObjCIvarRefExprClass: |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 692 | return EmitObjCIvarRefLValue(cast<ObjCIvarRefExpr>(E)); |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 693 | case Expr::StmtExprClass: |
| 694 | return EmitStmtExprLValue(cast<StmtExpr>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 695 | case Expr::UnaryOperatorClass: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 696 | return EmitUnaryOpLValue(cast<UnaryOperator>(E)); |
| 697 | case Expr::ArraySubscriptExprClass: |
| 698 | return EmitArraySubscriptExpr(cast<ArraySubscriptExpr>(E)); |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 699 | case Expr::ExtVectorElementExprClass: |
| 700 | return EmitExtVectorElementExpr(cast<ExtVectorElementExpr>(E)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 701 | case Expr::MemberExprClass: |
Douglas Gregor | bd4c4ae | 2009-08-26 22:36:53 +0000 | [diff] [blame] | 702 | return EmitMemberExpr(cast<MemberExpr>(E)); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 703 | case Expr::CompoundLiteralExprClass: |
| 704 | return EmitCompoundLiteralLValue(cast<CompoundLiteralExpr>(E)); |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 705 | case Expr::ConditionalOperatorClass: |
Anders Carlsson | 6fcec8b | 2009-09-15 16:35:24 +0000 | [diff] [blame] | 706 | return EmitConditionalOperatorLValue(cast<ConditionalOperator>(E)); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 707 | case Expr::BinaryConditionalOperatorClass: |
| 708 | return EmitConditionalOperatorLValue(cast<BinaryConditionalOperator>(E)); |
Chris Lattner | 670a62c | 2008-12-12 05:35:08 +0000 | [diff] [blame] | 709 | case Expr::ChooseExprClass: |
Eli Friedman | 7976932 | 2009-03-04 05:52:32 +0000 | [diff] [blame] | 710 | return EmitLValue(cast<ChooseExpr>(E)->getChosenSubExpr(getContext())); |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 711 | case Expr::OpaqueValueExprClass: |
| 712 | return EmitOpaqueValueLValue(cast<OpaqueValueExpr>(E)); |
John McCall | 91a5755 | 2011-07-15 05:09:51 +0000 | [diff] [blame] | 713 | case Expr::SubstNonTypeTemplateParmExprClass: |
| 714 | return EmitLValue(cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement()); |
Chris Lattner | c3953a6 | 2009-03-18 04:02:57 +0000 | [diff] [blame] | 715 | case Expr::ImplicitCastExprClass: |
| 716 | case Expr::CStyleCastExprClass: |
| 717 | case Expr::CXXFunctionalCastExprClass: |
| 718 | case Expr::CXXStaticCastExprClass: |
| 719 | case Expr::CXXDynamicCastExprClass: |
| 720 | case Expr::CXXReinterpretCastExprClass: |
| 721 | case Expr::CXXConstCastExprClass: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 722 | case Expr::ObjCBridgedCastExprClass: |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 723 | return EmitCastLValue(cast<CastExpr>(E)); |
Douglas Gregor | 03e8003 | 2011-06-21 17:03:29 +0000 | [diff] [blame] | 724 | |
| 725 | case Expr::MaterializeTemporaryExprClass: |
| 726 | return EmitMaterializeTemporaryExpr(cast<MaterializeTemporaryExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 727 | } |
| 728 | } |
| 729 | |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 730 | llvm::Value *CodeGenFunction::EmitLoadOfScalar(LValue lvalue) { |
| 731 | return EmitLoadOfScalar(lvalue.getAddress(), lvalue.isVolatile(), |
| 732 | lvalue.getAlignment(), lvalue.getType(), |
| 733 | lvalue.getTBAAInfo()); |
| 734 | } |
| 735 | |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 736 | llvm::Value *CodeGenFunction::EmitLoadOfScalar(llvm::Value *Addr, bool Volatile, |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 737 | unsigned Alignment, QualType Ty, |
| 738 | llvm::MDNode *TBAAInfo) { |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 739 | llvm::LoadInst *Load = Builder.CreateLoad(Addr); |
Daniel Dunbar | 2da84ff | 2009-11-29 21:23:36 +0000 | [diff] [blame] | 740 | if (Volatile) |
| 741 | Load->setVolatile(true); |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 742 | if (Alignment) |
| 743 | Load->setAlignment(Alignment); |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 744 | if (TBAAInfo) |
| 745 | CGM.DecorateInstruction(Load, TBAAInfo); |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 746 | |
John McCall | 26815d9 | 2010-10-27 20:58:56 +0000 | [diff] [blame] | 747 | return EmitFromMemory(Load, Ty); |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 748 | } |
| 749 | |
Douglas Gregor | 1274ccd | 2010-10-08 23:50:27 +0000 | [diff] [blame] | 750 | static bool isBooleanUnderlyingType(QualType Ty) { |
| 751 | if (const EnumType *ET = dyn_cast<EnumType>(Ty)) |
| 752 | return ET->getDecl()->getIntegerType()->isBooleanType(); |
| 753 | return false; |
| 754 | } |
| 755 | |
John McCall | 26815d9 | 2010-10-27 20:58:56 +0000 | [diff] [blame] | 756 | llvm::Value *CodeGenFunction::EmitToMemory(llvm::Value *Value, QualType Ty) { |
| 757 | // Bool has a different representation in memory than in registers. |
| 758 | if (Ty->isBooleanType() || isBooleanUnderlyingType(Ty)) { |
| 759 | // This should really always be an i1, but sometimes it's already |
| 760 | // an i8, and it's awkward to track those cases down. |
| 761 | if (Value->getType()->isIntegerTy(1)) |
| 762 | return Builder.CreateZExt(Value, Builder.getInt8Ty(), "frombool"); |
| 763 | assert(Value->getType()->isIntegerTy(8) && "value rep of bool not i1/i8"); |
| 764 | } |
| 765 | |
| 766 | return Value; |
| 767 | } |
| 768 | |
| 769 | llvm::Value *CodeGenFunction::EmitFromMemory(llvm::Value *Value, QualType Ty) { |
| 770 | // Bool has a different representation in memory than in registers. |
| 771 | if (Ty->isBooleanType() || isBooleanUnderlyingType(Ty)) { |
| 772 | assert(Value->getType()->isIntegerTy(8) && "memory rep of bool not i8"); |
| 773 | return Builder.CreateTrunc(Value, Builder.getInt1Ty(), "tobool"); |
| 774 | } |
| 775 | |
| 776 | return Value; |
| 777 | } |
| 778 | |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 779 | void CodeGenFunction::EmitStoreOfScalar(llvm::Value *Value, llvm::Value *Addr, |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 780 | bool Volatile, unsigned Alignment, |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 781 | QualType Ty, |
| 782 | llvm::MDNode *TBAAInfo) { |
John McCall | 26815d9 | 2010-10-27 20:58:56 +0000 | [diff] [blame] | 783 | Value = EmitToMemory(Value, Ty); |
Chris Lattner | 12569fb | 2011-07-10 03:38:35 +0000 | [diff] [blame] | 784 | |
Daniel Dunbar | 91a16fa | 2010-08-21 02:24:36 +0000 | [diff] [blame] | 785 | llvm::StoreInst *Store = Builder.CreateStore(Value, Addr, Volatile); |
| 786 | if (Alignment) |
| 787 | Store->setAlignment(Alignment); |
Dan Gohman | 3d5aff5 | 2010-10-14 23:06:10 +0000 | [diff] [blame] | 788 | if (TBAAInfo) |
| 789 | CGM.DecorateInstruction(Store, TBAAInfo); |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 790 | } |
| 791 | |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 792 | void CodeGenFunction::EmitStoreOfScalar(llvm::Value *value, LValue lvalue) { |
| 793 | EmitStoreOfScalar(value, lvalue.getAddress(), lvalue.isVolatile(), |
| 794 | lvalue.getAlignment(), lvalue.getType(), |
| 795 | lvalue.getTBAAInfo()); |
| 796 | } |
| 797 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 798 | /// EmitLoadOfLValue - Given an expression that represents a value lvalue, this |
| 799 | /// method emits the address of the lvalue, then loads the result as an rvalue, |
| 800 | /// returning the rvalue. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 801 | RValue CodeGenFunction::EmitLoadOfLValue(LValue LV) { |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 802 | if (LV.isObjCWeak()) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 803 | // load of a __weak object. |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 804 | llvm::Value *AddrWeakObj = LV.getAddress(); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 805 | return RValue::get(CGM.getObjCRuntime().EmitObjCWeakRead(*this, |
| 806 | AddrWeakObj)); |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 807 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 808 | if (LV.getQuals().getObjCLifetime() == Qualifiers::OCL_Weak) |
| 809 | return RValue::get(EmitARCLoadWeak(LV.getAddress())); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 810 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 811 | if (LV.isSimple()) { |
John McCall | e6d134b | 2011-06-27 21:24:11 +0000 | [diff] [blame] | 812 | assert(!LV.getType()->isFunctionType()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 813 | |
John McCall | d608cdb | 2010-08-22 10:59:02 +0000 | [diff] [blame] | 814 | // Everything needs a load. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 815 | return RValue::get(EmitLoadOfScalar(LV)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 816 | } |
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.isVectorElt()) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 819 | llvm::Value *Vec = Builder.CreateLoad(LV.getVectorAddr(), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 820 | LV.isVolatileQualified()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 821 | return RValue::get(Builder.CreateExtractElement(Vec, LV.getVectorIdx(), |
| 822 | "vecext")); |
| 823 | } |
Chris Lattner | 46ea8eb | 2007-08-03 00:16:29 +0000 | [diff] [blame] | 824 | |
| 825 | // If this is a reference to a subset of the elements of a vector, either |
| 826 | // shuffle the input or extract/insert them as appropriate. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 827 | if (LV.isExtVectorElt()) |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 828 | return EmitLoadOfExtVectorElementLValue(LV); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 829 | |
John McCall | db45806 | 2011-11-07 03:59:57 +0000 | [diff] [blame^] | 830 | assert(LV.isBitField() && "Unknown LValue type!"); |
| 831 | return EmitLoadOfBitfieldLValue(LV); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 832 | } |
| 833 | |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 834 | RValue CodeGenFunction::EmitLoadOfBitfieldLValue(LValue LV) { |
Daniel Dunbar | efbf487 | 2010-04-06 01:07:44 +0000 | [diff] [blame] | 835 | const CGBitFieldInfo &Info = LV.getBitFieldInfo(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 836 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 837 | // Get the output type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 838 | llvm::Type *ResLTy = ConvertType(LV.getType()); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 839 | unsigned ResSizeInBits = CGM.getTargetData().getTypeSizeInBits(ResLTy); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 840 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 841 | // Compute the result as an OR of all of the individual component accesses. |
| 842 | llvm::Value *Res = 0; |
| 843 | for (unsigned i = 0, e = Info.getNumComponents(); i != e; ++i) { |
| 844 | const CGBitFieldInfo::AccessInfo &AI = Info.getComponent(i); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 845 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 846 | // Get the field pointer. |
| 847 | llvm::Value *Ptr = LV.getBitFieldBaseAddr(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 848 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 849 | // Only offset by the field index if used, so that incoming values are not |
| 850 | // required to be structures. |
| 851 | if (AI.FieldIndex) |
| 852 | Ptr = Builder.CreateStructGEP(Ptr, AI.FieldIndex, "bf.field"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 853 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 854 | // Offset by the byte offset, if used. |
Ken Dyck | 28ebde5 | 2011-04-24 10:04:59 +0000 | [diff] [blame] | 855 | if (!AI.FieldByteOffset.isZero()) { |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 856 | Ptr = EmitCastToVoidPtr(Ptr); |
Ken Dyck | 28ebde5 | 2011-04-24 10:04:59 +0000 | [diff] [blame] | 857 | Ptr = Builder.CreateConstGEP1_32(Ptr, AI.FieldByteOffset.getQuantity(), |
| 858 | "bf.field.offs"); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 859 | } |
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 | // Cast to the access type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 862 | llvm::Type *PTy = llvm::Type::getIntNPtrTy(getLLVMContext(), |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 863 | AI.AccessWidth, |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 864 | CGM.getContext().getTargetAddressSpace(LV.getType())); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 865 | Ptr = Builder.CreateBitCast(Ptr, PTy); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 866 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 867 | // Perform the load. |
| 868 | llvm::LoadInst *Load = Builder.CreateLoad(Ptr, LV.isVolatileQualified()); |
Ken Dyck | b9e6b2c | 2011-04-24 10:13:17 +0000 | [diff] [blame] | 869 | if (!AI.AccessAlignment.isZero()) |
| 870 | Load->setAlignment(AI.AccessAlignment.getQuantity()); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 871 | |
| 872 | // Shift out unused low bits and mask out unused high bits. |
| 873 | llvm::Value *Val = Load; |
| 874 | if (AI.FieldBitStart) |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 875 | Val = Builder.CreateLShr(Load, AI.FieldBitStart); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 876 | Val = Builder.CreateAnd(Val, llvm::APInt::getLowBitsSet(AI.AccessWidth, |
| 877 | AI.TargetBitWidth), |
| 878 | "bf.clear"); |
| 879 | |
| 880 | // Extend or truncate to the target size. |
| 881 | if (AI.AccessWidth < ResSizeInBits) |
| 882 | Val = Builder.CreateZExt(Val, ResLTy); |
| 883 | else if (AI.AccessWidth > ResSizeInBits) |
| 884 | Val = Builder.CreateTrunc(Val, ResLTy); |
| 885 | |
| 886 | // Shift into place, and OR into the result. |
| 887 | if (AI.TargetBitOffset) |
| 888 | Val = Builder.CreateShl(Val, AI.TargetBitOffset); |
| 889 | Res = Res ? Builder.CreateOr(Res, Val) : Val; |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 890 | } |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 891 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 892 | // If the bit-field is signed, perform the sign-extension. |
| 893 | // |
| 894 | // FIXME: This can easily be folded into the load of the high bits, which |
| 895 | // could also eliminate the mask of high bits in some situations. |
| 896 | if (Info.isSigned()) { |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 897 | unsigned ExtraBits = ResSizeInBits - Info.getSize(); |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 898 | if (ExtraBits) |
| 899 | Res = Builder.CreateAShr(Builder.CreateShl(Res, ExtraBits), |
| 900 | ExtraBits, "bf.val.sext"); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 901 | } |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 902 | |
Daniel Dunbar | ecdb41e | 2010-04-13 23:34:15 +0000 | [diff] [blame] | 903 | return RValue::get(Res); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 904 | } |
| 905 | |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 906 | // If this is a reference to a subset of the elements of a vector, create an |
| 907 | // appropriate shufflevector. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 908 | RValue CodeGenFunction::EmitLoadOfExtVectorElementLValue(LValue LV) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 909 | llvm::Value *Vec = Builder.CreateLoad(LV.getExtVectorAddr(), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 910 | LV.isVolatileQualified()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 911 | |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 912 | const llvm::Constant *Elts = LV.getExtVectorElts(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 913 | |
| 914 | // If the result of the expression is a non-vector type, we must be extracting |
| 915 | // a single element. Just codegen as an extractelement. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 916 | const VectorType *ExprVT = LV.getType()->getAs<VectorType>(); |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 917 | if (!ExprVT) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 918 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 919 | llvm::Value *Elt = llvm::ConstantInt::get(Int32Ty, InIdx); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 920 | return RValue::get(Builder.CreateExtractElement(Vec, Elt)); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 921 | } |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 922 | |
| 923 | // Always use shuffle vector to try to retain the original program structure |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 924 | unsigned NumResultElts = ExprVT->getNumElements(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 925 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 926 | SmallVector<llvm::Constant*, 4> Mask; |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 927 | for (unsigned i = 0; i != NumResultElts; ++i) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 928 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 929 | Mask.push_back(llvm::ConstantInt::get(Int32Ty, InIdx)); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 930 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 931 | |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 932 | llvm::Value *MaskV = llvm::ConstantVector::get(Mask); |
| 933 | Vec = Builder.CreateShuffleVector(Vec, llvm::UndefValue::get(Vec->getType()), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 934 | MaskV); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 935 | return RValue::get(Vec); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 936 | } |
| 937 | |
| 938 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 939 | |
| 940 | /// EmitStoreThroughLValue - Store the specified rvalue into the specified |
| 941 | /// lvalue, where both are guaranteed to the have the same type, and that type |
| 942 | /// is 'Ty'. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 943 | void CodeGenFunction::EmitStoreThroughLValue(RValue Src, LValue Dst) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 944 | if (!Dst.isSimple()) { |
| 945 | if (Dst.isVectorElt()) { |
| 946 | // Read/modify/write the vector, inserting the new element. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 947 | llvm::Value *Vec = Builder.CreateLoad(Dst.getVectorAddr(), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 948 | Dst.isVolatileQualified()); |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 949 | Vec = Builder.CreateInsertElement(Vec, Src.getScalarVal(), |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 950 | Dst.getVectorIdx(), "vecins"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 951 | Builder.CreateStore(Vec, Dst.getVectorAddr(),Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 952 | return; |
| 953 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 954 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 955 | // If this is an update of extended vector elements, insert them as |
| 956 | // appropriate. |
| 957 | if (Dst.isExtVectorElt()) |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 958 | return EmitStoreThroughExtVectorComponentLValue(Src, Dst); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 959 | |
John McCall | db45806 | 2011-11-07 03:59:57 +0000 | [diff] [blame^] | 960 | assert(Dst.isBitField() && "Unknown LValue type"); |
| 961 | return EmitStoreThroughBitfieldLValue(Src, Dst); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 962 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 963 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 964 | // There's special magic for assigning into an ARC-qualified l-value. |
| 965 | if (Qualifiers::ObjCLifetime Lifetime = Dst.getQuals().getObjCLifetime()) { |
| 966 | switch (Lifetime) { |
| 967 | case Qualifiers::OCL_None: |
| 968 | llvm_unreachable("present but none"); |
| 969 | |
| 970 | case Qualifiers::OCL_ExplicitNone: |
| 971 | // nothing special |
| 972 | break; |
| 973 | |
| 974 | case Qualifiers::OCL_Strong: |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 975 | EmitARCStoreStrong(Dst, Src.getScalarVal(), /*ignore*/ true); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 976 | return; |
| 977 | |
| 978 | case Qualifiers::OCL_Weak: |
| 979 | EmitARCStoreWeak(Dst.getAddress(), Src.getScalarVal(), /*ignore*/ true); |
| 980 | return; |
| 981 | |
| 982 | case Qualifiers::OCL_Autoreleasing: |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 983 | Src = RValue::get(EmitObjCExtendObjectLifetime(Dst.getType(), |
| 984 | Src.getScalarVal())); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 985 | // fall into the normal path |
| 986 | break; |
| 987 | } |
| 988 | } |
| 989 | |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 990 | if (Dst.isObjCWeak() && !Dst.isNonGC()) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 991 | // load of a __weak object. |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 992 | llvm::Value *LvalueDst = Dst.getAddress(); |
| 993 | llvm::Value *src = Src.getScalarVal(); |
Mike Stump | f33651c | 2009-04-14 00:57:29 +0000 | [diff] [blame] | 994 | CGM.getObjCRuntime().EmitObjCWeakAssign(*this, src, LvalueDst); |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 995 | return; |
| 996 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 997 | |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 998 | if (Dst.isObjCStrong() && !Dst.isNonGC()) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 999 | // load of a __strong object. |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 1000 | llvm::Value *LvalueDst = Dst.getAddress(); |
| 1001 | llvm::Value *src = Src.getScalarVal(); |
Fariborz Jahanian | 6c7a1f3 | 2009-09-24 22:25:38 +0000 | [diff] [blame] | 1002 | if (Dst.isObjCIvar()) { |
| 1003 | assert(Dst.getBaseIvarExp() && "BaseIvarExp is NULL"); |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1004 | llvm::Type *ResultType = ConvertType(getContext().LongTy); |
Fariborz Jahanian | 6c7a1f3 | 2009-09-24 22:25:38 +0000 | [diff] [blame] | 1005 | llvm::Value *RHS = EmitScalarExpr(Dst.getBaseIvarExp()); |
Fariborz Jahanian | 76368e8 | 2009-09-25 00:00:20 +0000 | [diff] [blame] | 1006 | llvm::Value *dst = RHS; |
Fariborz Jahanian | 6c7a1f3 | 2009-09-24 22:25:38 +0000 | [diff] [blame] | 1007 | RHS = Builder.CreatePtrToInt(RHS, ResultType, "sub.ptr.rhs.cast"); |
| 1008 | llvm::Value *LHS = |
| 1009 | Builder.CreatePtrToInt(LvalueDst, ResultType, "sub.ptr.lhs.cast"); |
| 1010 | llvm::Value *BytesBetween = Builder.CreateSub(LHS, RHS, "ivar.offset"); |
Fariborz Jahanian | 76368e8 | 2009-09-25 00:00:20 +0000 | [diff] [blame] | 1011 | CGM.getObjCRuntime().EmitObjCIvarAssign(*this, src, dst, |
Fariborz Jahanian | 6c7a1f3 | 2009-09-24 22:25:38 +0000 | [diff] [blame] | 1012 | BytesBetween); |
Fariborz Jahanian | 021a7a6 | 2010-07-20 20:30:03 +0000 | [diff] [blame] | 1013 | } else if (Dst.isGlobalObjCRef()) { |
| 1014 | CGM.getObjCRuntime().EmitObjCGlobalAssign(*this, src, LvalueDst, |
| 1015 | Dst.isThreadLocalRef()); |
| 1016 | } |
Fariborz Jahanian | bf63b87 | 2009-05-04 23:27:20 +0000 | [diff] [blame] | 1017 | else |
| 1018 | CGM.getObjCRuntime().EmitObjCStrongCastAssign(*this, src, LvalueDst); |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 1019 | return; |
| 1020 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1021 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 1022 | assert(Src.isScalar() && "Can't emit an agg store with this method"); |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1023 | EmitStoreOfScalar(Src.getScalarVal(), Dst); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1024 | } |
| 1025 | |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 1026 | void CodeGenFunction::EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1027 | llvm::Value **Result) { |
Daniel Dunbar | efbf487 | 2010-04-06 01:07:44 +0000 | [diff] [blame] | 1028 | const CGBitFieldInfo &Info = Dst.getBitFieldInfo(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 1029 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1030 | // Get the output type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1031 | llvm::Type *ResLTy = ConvertTypeForMem(Dst.getType()); |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1032 | unsigned ResSizeInBits = CGM.getTargetData().getTypeSizeInBits(ResLTy); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 1033 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1034 | // Get the source value, truncated to the width of the bit-field. |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1035 | llvm::Value *SrcVal = Src.getScalarVal(); |
Anders Carlsson | 4803535 | 2010-04-17 21:52:22 +0000 | [diff] [blame] | 1036 | |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1037 | if (Dst.getType()->isBooleanType()) |
Anders Carlsson | 4803535 | 2010-04-17 21:52:22 +0000 | [diff] [blame] | 1038 | SrcVal = Builder.CreateIntCast(SrcVal, ResLTy, /*IsSigned=*/false); |
| 1039 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1040 | SrcVal = Builder.CreateAnd(SrcVal, llvm::APInt::getLowBitsSet(ResSizeInBits, |
| 1041 | Info.getSize()), |
| 1042 | "bf.value"); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 1043 | |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1044 | // Return the new value of the bit-field, if requested. |
| 1045 | if (Result) { |
| 1046 | // Cast back to the proper type for result. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1047 | llvm::Type *SrcTy = Src.getScalarVal()->getType(); |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1048 | llvm::Value *ReloadVal = Builder.CreateIntCast(SrcVal, SrcTy, false, |
| 1049 | "bf.reload.val"); |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1050 | |
| 1051 | // Sign extend if necessary. |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1052 | if (Info.isSigned()) { |
| 1053 | unsigned ExtraBits = ResSizeInBits - Info.getSize(); |
| 1054 | if (ExtraBits) |
| 1055 | ReloadVal = Builder.CreateAShr(Builder.CreateShl(ReloadVal, ExtraBits), |
| 1056 | ExtraBits, "bf.reload.sext"); |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1057 | } |
| 1058 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1059 | *Result = ReloadVal; |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 1060 | } |
| 1061 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1062 | // Iterate over the components, writing each piece to memory. |
| 1063 | for (unsigned i = 0, e = Info.getNumComponents(); i != e; ++i) { |
| 1064 | const CGBitFieldInfo::AccessInfo &AI = Info.getComponent(i); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 1065 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1066 | // Get the field pointer. |
| 1067 | llvm::Value *Ptr = Dst.getBitFieldBaseAddr(); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1068 | unsigned addressSpace = |
| 1069 | cast<llvm::PointerType>(Ptr->getType())->getAddressSpace(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1070 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1071 | // Only offset by the field index if used, so that incoming values are not |
| 1072 | // required to be structures. |
| 1073 | if (AI.FieldIndex) |
| 1074 | Ptr = Builder.CreateStructGEP(Ptr, AI.FieldIndex, "bf.field"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1075 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1076 | // Offset by the byte offset, if used. |
Ken Dyck | 28ebde5 | 2011-04-24 10:04:59 +0000 | [diff] [blame] | 1077 | if (!AI.FieldByteOffset.isZero()) { |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1078 | Ptr = EmitCastToVoidPtr(Ptr); |
Ken Dyck | 28ebde5 | 2011-04-24 10:04:59 +0000 | [diff] [blame] | 1079 | Ptr = Builder.CreateConstGEP1_32(Ptr, AI.FieldByteOffset.getQuantity(), |
| 1080 | "bf.field.offs"); |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1081 | } |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 1082 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1083 | // Cast to the access type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1084 | llvm::Type *AccessLTy = |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1085 | llvm::Type::getIntNTy(getLLVMContext(), AI.AccessWidth); |
| 1086 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1087 | llvm::Type *PTy = AccessLTy->getPointerTo(addressSpace); |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1088 | Ptr = Builder.CreateBitCast(Ptr, PTy); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1089 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1090 | // Extract the piece of the bit-field value to write in this access, limited |
| 1091 | // to the values that are part of this access. |
| 1092 | llvm::Value *Val = SrcVal; |
| 1093 | if (AI.TargetBitOffset) |
| 1094 | Val = Builder.CreateLShr(Val, AI.TargetBitOffset); |
| 1095 | Val = Builder.CreateAnd(Val, llvm::APInt::getLowBitsSet(ResSizeInBits, |
| 1096 | AI.TargetBitWidth)); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1097 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1098 | // Extend or truncate to the access size. |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1099 | if (ResSizeInBits < AI.AccessWidth) |
| 1100 | Val = Builder.CreateZExt(Val, AccessLTy); |
| 1101 | else if (ResSizeInBits > AI.AccessWidth) |
| 1102 | Val = Builder.CreateTrunc(Val, AccessLTy); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1103 | |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1104 | // Shift into the position in memory. |
| 1105 | if (AI.FieldBitStart) |
| 1106 | Val = Builder.CreateShl(Val, AI.FieldBitStart); |
| 1107 | |
| 1108 | // If necessary, load and OR in bits that are outside of the bit-field. |
| 1109 | if (AI.TargetBitWidth != AI.AccessWidth) { |
| 1110 | llvm::LoadInst *Load = Builder.CreateLoad(Ptr, Dst.isVolatileQualified()); |
Ken Dyck | b9e6b2c | 2011-04-24 10:13:17 +0000 | [diff] [blame] | 1111 | if (!AI.AccessAlignment.isZero()) |
| 1112 | Load->setAlignment(AI.AccessAlignment.getQuantity()); |
Daniel Dunbar | 2677261 | 2010-04-15 03:47:33 +0000 | [diff] [blame] | 1113 | |
| 1114 | // Compute the mask for zeroing the bits that are part of the bit-field. |
| 1115 | llvm::APInt InvMask = |
| 1116 | ~llvm::APInt::getBitsSet(AI.AccessWidth, AI.FieldBitStart, |
| 1117 | AI.FieldBitStart + AI.TargetBitWidth); |
| 1118 | |
| 1119 | // Apply the mask and OR in to the value to write. |
| 1120 | Val = Builder.CreateOr(Builder.CreateAnd(Load, InvMask), Val); |
| 1121 | } |
| 1122 | |
| 1123 | // Write the value. |
| 1124 | llvm::StoreInst *Store = Builder.CreateStore(Val, Ptr, |
| 1125 | Dst.isVolatileQualified()); |
Ken Dyck | b9e6b2c | 2011-04-24 10:13:17 +0000 | [diff] [blame] | 1126 | if (!AI.AccessAlignment.isZero()) |
| 1127 | Store->setAlignment(AI.AccessAlignment.getQuantity()); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 1128 | } |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 1129 | } |
| 1130 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 1131 | void CodeGenFunction::EmitStoreThroughExtVectorComponentLValue(RValue Src, |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1132 | LValue Dst) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 1133 | // This access turns into a read/modify/write of the vector. Load the input |
| 1134 | // value now. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1135 | llvm::Value *Vec = Builder.CreateLoad(Dst.getExtVectorAddr(), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1136 | Dst.isVolatileQualified()); |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1137 | const llvm::Constant *Elts = Dst.getExtVectorElts(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1138 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 1139 | llvm::Value *SrcVal = Src.getScalarVal(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1140 | |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1141 | if (const VectorType *VTy = Dst.getType()->getAs<VectorType>()) { |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 1142 | unsigned NumSrcElts = VTy->getNumElements(); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1143 | unsigned NumDstElts = |
| 1144 | cast<llvm::VectorType>(Vec->getType())->getNumElements(); |
| 1145 | if (NumDstElts == NumSrcElts) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1146 | // Use shuffle vector is the src and destination are the same number of |
| 1147 | // elements and restore the vector mask since it is on the side it will be |
| 1148 | // stored. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1149 | SmallVector<llvm::Constant*, 4> Mask(NumDstElts); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1150 | for (unsigned i = 0; i != NumSrcElts; ++i) { |
| 1151 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 1152 | Mask[InIdx] = llvm::ConstantInt::get(Int32Ty, i); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1153 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1154 | |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1155 | llvm::Value *MaskV = llvm::ConstantVector::get(Mask); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1156 | Vec = Builder.CreateShuffleVector(SrcVal, |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 1157 | llvm::UndefValue::get(Vec->getType()), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1158 | MaskV); |
Mike Stump | b3589f4 | 2009-07-30 22:28:39 +0000 | [diff] [blame] | 1159 | } else if (NumDstElts > NumSrcElts) { |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1160 | // Extended the source vector to the same length and then shuffle it |
| 1161 | // into the destination. |
| 1162 | // FIXME: since we're shuffling with undef, can we just use the indices |
| 1163 | // into that? This could be simpler. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1164 | SmallVector<llvm::Constant*, 4> ExtMask; |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1165 | unsigned i; |
| 1166 | for (i = 0; i != NumSrcElts; ++i) |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1167 | ExtMask.push_back(llvm::ConstantInt::get(Int32Ty, i)); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1168 | for (; i != NumDstElts; ++i) |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1169 | ExtMask.push_back(llvm::UndefValue::get(Int32Ty)); |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1170 | llvm::Value *ExtMaskV = llvm::ConstantVector::get(ExtMask); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1171 | llvm::Value *ExtSrcVal = |
Daniel Dunbar | bb76773 | 2009-02-17 18:31:04 +0000 | [diff] [blame] | 1172 | Builder.CreateShuffleVector(SrcVal, |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 1173 | llvm::UndefValue::get(SrcVal->getType()), |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1174 | ExtMaskV); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1175 | // build identity |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1176 | SmallVector<llvm::Constant*, 4> Mask; |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1177 | for (unsigned i = 0; i != NumDstElts; ++i) |
| 1178 | Mask.push_back(llvm::ConstantInt::get(Int32Ty, i)); |
| 1179 | |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1180 | // modify when what gets shuffled in |
| 1181 | for (unsigned i = 0; i != NumSrcElts; ++i) { |
| 1182 | unsigned Idx = getAccessedFieldNo(i, Elts); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1183 | Mask[Idx] = llvm::ConstantInt::get(Int32Ty, i+NumDstElts); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1184 | } |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1185 | llvm::Value *MaskV = llvm::ConstantVector::get(Mask); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1186 | Vec = Builder.CreateShuffleVector(Vec, ExtSrcVal, MaskV); |
Mike Stump | b3589f4 | 2009-07-30 22:28:39 +0000 | [diff] [blame] | 1187 | } else { |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 1188 | // We should never shorten the vector |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1189 | llvm_unreachable("unexpected shorten vector length"); |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 1190 | } |
| 1191 | } else { |
| 1192 | // 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] | 1193 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1194 | llvm::Value *Elt = llvm::ConstantInt::get(Int32Ty, InIdx); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1195 | Vec = Builder.CreateInsertElement(Vec, SrcVal, Elt); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 1196 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1197 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1198 | Builder.CreateStore(Vec, Dst.getExtVectorAddr(), Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 1199 | } |
| 1200 | |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1201 | // setObjCGCLValueClass - sets class of he lvalue for the purpose of |
| 1202 | // generating write-barries API. It is currently a global, ivar, |
| 1203 | // or neither. |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1204 | static void setObjCGCLValueClass(const ASTContext &Ctx, const Expr *E, |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1205 | LValue &LV, |
| 1206 | bool IsMemberAccess=false) { |
Douglas Gregor | e289d81 | 2011-09-13 17:21:33 +0000 | [diff] [blame] | 1207 | if (Ctx.getLangOptions().getGC() == LangOptions::NonGC) |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1208 | return; |
| 1209 | |
Fariborz Jahanian | dbf3cfd | 2009-09-16 23:11:23 +0000 | [diff] [blame] | 1210 | if (isa<ObjCIvarRefExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1211 | QualType ExpTy = E->getType(); |
| 1212 | if (IsMemberAccess && ExpTy->isPointerType()) { |
| 1213 | // If ivar is a structure pointer, assigning to field of |
| 1214 | // this struct follows gcc's behavior and makes it a non-ivar |
| 1215 | // writer-barrier conservatively. |
| 1216 | ExpTy = ExpTy->getAs<PointerType>()->getPointeeType(); |
| 1217 | if (ExpTy->isRecordType()) { |
| 1218 | LV.setObjCIvar(false); |
| 1219 | return; |
| 1220 | } |
| 1221 | } |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1222 | LV.setObjCIvar(true); |
Fariborz Jahanian | 6c7a1f3 | 2009-09-24 22:25:38 +0000 | [diff] [blame] | 1223 | ObjCIvarRefExpr *Exp = cast<ObjCIvarRefExpr>(const_cast<Expr*>(E)); |
| 1224 | LV.setBaseIvarExp(Exp->getBase()); |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1225 | LV.setObjCArray(E->getType()->isArrayType()); |
Fariborz Jahanian | dbf3cfd | 2009-09-16 23:11:23 +0000 | [diff] [blame] | 1226 | return; |
| 1227 | } |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1228 | |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1229 | if (const DeclRefExpr *Exp = dyn_cast<DeclRefExpr>(E)) { |
| 1230 | if (const VarDecl *VD = dyn_cast<VarDecl>(Exp->getDecl())) { |
John McCall | b6bbcc9 | 2010-10-15 04:57:14 +0000 | [diff] [blame] | 1231 | if (VD->hasGlobalStorage()) { |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1232 | LV.setGlobalObjCRef(true); |
| 1233 | LV.setThreadLocalRef(VD->isThreadSpecified()); |
Fariborz Jahanian | 021a7a6 | 2010-07-20 20:30:03 +0000 | [diff] [blame] | 1234 | } |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1235 | } |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1236 | LV.setObjCArray(E->getType()->isArrayType()); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1237 | return; |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1238 | } |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1239 | |
| 1240 | if (const UnaryOperator *Exp = dyn_cast<UnaryOperator>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1241 | setObjCGCLValueClass(Ctx, Exp->getSubExpr(), LV, IsMemberAccess); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1242 | return; |
| 1243 | } |
| 1244 | |
| 1245 | if (const ParenExpr *Exp = dyn_cast<ParenExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1246 | setObjCGCLValueClass(Ctx, Exp->getSubExpr(), LV, IsMemberAccess); |
Fariborz Jahanian | 75b08f1 | 2009-09-30 17:10:29 +0000 | [diff] [blame] | 1247 | if (LV.isObjCIvar()) { |
| 1248 | // If cast is to a structure pointer, follow gcc's behavior and make it |
| 1249 | // a non-ivar write-barrier. |
| 1250 | QualType ExpTy = E->getType(); |
| 1251 | if (ExpTy->isPointerType()) |
| 1252 | ExpTy = ExpTy->getAs<PointerType>()->getPointeeType(); |
| 1253 | if (ExpTy->isRecordType()) |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1254 | LV.setObjCIvar(false); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1255 | } |
| 1256 | return; |
Fariborz Jahanian | 75b08f1 | 2009-09-30 17:10:29 +0000 | [diff] [blame] | 1257 | } |
Peter Collingbourne | f111d93 | 2011-04-15 00:35:48 +0000 | [diff] [blame] | 1258 | |
| 1259 | if (const GenericSelectionExpr *Exp = dyn_cast<GenericSelectionExpr>(E)) { |
| 1260 | setObjCGCLValueClass(Ctx, Exp->getResultExpr(), LV); |
| 1261 | return; |
| 1262 | } |
| 1263 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1264 | if (const ImplicitCastExpr *Exp = dyn_cast<ImplicitCastExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1265 | setObjCGCLValueClass(Ctx, Exp->getSubExpr(), LV, IsMemberAccess); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1266 | return; |
| 1267 | } |
| 1268 | |
| 1269 | if (const CStyleCastExpr *Exp = dyn_cast<CStyleCastExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1270 | setObjCGCLValueClass(Ctx, Exp->getSubExpr(), LV, IsMemberAccess); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1271 | return; |
| 1272 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1273 | |
| 1274 | if (const ObjCBridgedCastExpr *Exp = dyn_cast<ObjCBridgedCastExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1275 | setObjCGCLValueClass(Ctx, Exp->getSubExpr(), LV, IsMemberAccess); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1276 | return; |
| 1277 | } |
| 1278 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1279 | if (const ArraySubscriptExpr *Exp = dyn_cast<ArraySubscriptExpr>(E)) { |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1280 | setObjCGCLValueClass(Ctx, Exp->getBase(), LV); |
Fariborz Jahanian | fd02ed7 | 2009-09-21 18:54:29 +0000 | [diff] [blame] | 1281 | if (LV.isObjCIvar() && !LV.isObjCArray()) |
Fariborz Jahanian | 1c1afc4 | 2009-09-18 00:04:00 +0000 | [diff] [blame] | 1282 | // Using array syntax to assigning to what an ivar points to is not |
| 1283 | // same as assigning to the ivar itself. {id *Names;} Names[i] = 0; |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1284 | LV.setObjCIvar(false); |
Fariborz Jahanian | fd02ed7 | 2009-09-21 18:54:29 +0000 | [diff] [blame] | 1285 | else if (LV.isGlobalObjCRef() && !LV.isObjCArray()) |
| 1286 | // Using array syntax to assigning to what global points to is not |
| 1287 | // same as assigning to the global itself. {id *G;} G[i] = 0; |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1288 | LV.setGlobalObjCRef(false); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1289 | return; |
Fariborz Jahanian | 1c1afc4 | 2009-09-18 00:04:00 +0000 | [diff] [blame] | 1290 | } |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1291 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1292 | if (const MemberExpr *Exp = dyn_cast<MemberExpr>(E)) { |
Fariborz Jahanian | ccae76c | 2011-09-30 18:23:36 +0000 | [diff] [blame] | 1293 | setObjCGCLValueClass(Ctx, Exp->getBase(), LV, true); |
Fariborz Jahanian | 1c1afc4 | 2009-09-18 00:04:00 +0000 | [diff] [blame] | 1294 | // We don't know if member is an 'ivar', but this flag is looked at |
| 1295 | // only in the context of LV.isObjCIvar(). |
Daniel Dunbar | 3491b3d | 2010-08-21 03:51:29 +0000 | [diff] [blame] | 1296 | LV.setObjCArray(E->getType()->isArrayType()); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1297 | return; |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1298 | } |
| 1299 | } |
| 1300 | |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1301 | static llvm::Value * |
Chandler Carruth | a98742c | 2011-07-12 08:58:26 +0000 | [diff] [blame] | 1302 | EmitBitCastOfLValueToProperType(CodeGenFunction &CGF, |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1303 | llvm::Value *V, llvm::Type *IRType, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1304 | StringRef Name = StringRef()) { |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1305 | unsigned AS = cast<llvm::PointerType>(V->getType())->getAddressSpace(); |
Chandler Carruth | a98742c | 2011-07-12 08:58:26 +0000 | [diff] [blame] | 1306 | return CGF.Builder.CreateBitCast(V, IRType->getPointerTo(AS), Name); |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1307 | } |
| 1308 | |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1309 | static LValue EmitGlobalVarDeclLValue(CodeGenFunction &CGF, |
| 1310 | const Expr *E, const VarDecl *VD) { |
Daniel Dunbar | d2113f2 | 2009-11-08 09:46:46 +0000 | [diff] [blame] | 1311 | assert((VD->hasExternalStorage() || VD->isFileVarDecl()) && |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1312 | "Var decl must have external storage or be a file var decl!"); |
| 1313 | |
| 1314 | llvm::Value *V = CGF.CGM.GetAddrOfGlobalVar(VD); |
| 1315 | if (VD->getType()->isReferenceType()) |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1316 | V = CGF.Builder.CreateLoad(V); |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 1317 | |
Chandler Carruth | a98742c | 2011-07-12 08:58:26 +0000 | [diff] [blame] | 1318 | V = EmitBitCastOfLValueToProperType(CGF, V, |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1319 | CGF.getTypes().ConvertTypeForMem(E->getType())); |
| 1320 | |
| 1321 | unsigned Alignment = CGF.getContext().getDeclAlign(VD).getQuantity(); |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1322 | LValue LV = CGF.MakeAddrLValue(V, E->getType(), Alignment); |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1323 | setObjCGCLValueClass(CGF.getContext(), E, LV); |
| 1324 | return LV; |
| 1325 | } |
| 1326 | |
Eli Friedman | 9a14630 | 2009-11-26 06:08:14 +0000 | [diff] [blame] | 1327 | static LValue EmitFunctionDeclLValue(CodeGenFunction &CGF, |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 1328 | const Expr *E, const FunctionDecl *FD) { |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1329 | llvm::Value *V = CGF.CGM.GetAddrOfFunction(FD); |
Eli Friedman | 9a14630 | 2009-11-26 06:08:14 +0000 | [diff] [blame] | 1330 | if (!FD->hasPrototype()) { |
| 1331 | if (const FunctionProtoType *Proto = |
| 1332 | FD->getType()->getAs<FunctionProtoType>()) { |
| 1333 | // Ugly case: for a K&R-style definition, the type of the definition |
| 1334 | // isn't the same as the type of a use. Correct for this with a |
| 1335 | // bitcast. |
| 1336 | QualType NoProtoType = |
| 1337 | CGF.getContext().getFunctionNoProtoType(Proto->getResultType()); |
| 1338 | NoProtoType = CGF.getContext().getPointerType(NoProtoType); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1339 | V = CGF.Builder.CreateBitCast(V, CGF.ConvertType(NoProtoType)); |
Eli Friedman | 9a14630 | 2009-11-26 06:08:14 +0000 | [diff] [blame] | 1340 | } |
| 1341 | } |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1342 | unsigned Alignment = CGF.getContext().getDeclAlign(FD).getQuantity(); |
| 1343 | return CGF.MakeAddrLValue(V, E->getType(), Alignment); |
Eli Friedman | 9a14630 | 2009-11-26 06:08:14 +0000 | [diff] [blame] | 1344 | } |
| 1345 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1346 | LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) { |
Anders Carlsson | 1e74c4f | 2009-11-07 22:53:10 +0000 | [diff] [blame] | 1347 | const NamedDecl *ND = E->getDecl(); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1348 | unsigned Alignment = getContext().getDeclAlign(ND).getQuantity(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1349 | |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1350 | if (ND->hasAttr<WeakRefAttr>()) { |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1351 | const ValueDecl *VD = cast<ValueDecl>(ND); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1352 | llvm::Constant *Aliasee = CGM.GetWeakRefReference(VD); |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1353 | return MakeAddrLValue(Aliasee, E->getType(), Alignment); |
Rafael Espindola | 6a83670 | 2010-03-04 18:17:24 +0000 | [diff] [blame] | 1354 | } |
| 1355 | |
Anders Carlsson | 1e74c4f | 2009-11-07 22:53:10 +0000 | [diff] [blame] | 1356 | if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) { |
Anders Carlsson | 1e74c4f | 2009-11-07 22:53:10 +0000 | [diff] [blame] | 1357 | |
| 1358 | // Check if this is a global variable. |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1359 | if (VD->hasExternalStorage() || VD->isFileVarDecl()) |
| 1360 | return EmitGlobalVarDeclLValue(*this, E, VD); |
Anders Carlsson | 0bc7049 | 2009-11-07 22:46:42 +0000 | [diff] [blame] | 1361 | |
Fariborz Jahanian | 75f91d6 | 2010-11-19 18:17:09 +0000 | [diff] [blame] | 1362 | bool NonGCable = VD->hasLocalStorage() && |
| 1363 | !VD->getType()->isReferenceType() && |
| 1364 | !VD->hasAttr<BlocksAttr>(); |
Anders Carlsson | 0bc7049 | 2009-11-07 22:46:42 +0000 | [diff] [blame] | 1365 | |
| 1366 | llvm::Value *V = LocalDeclMap[VD]; |
Fariborz Jahanian | 0934914 | 2010-09-07 23:26:17 +0000 | [diff] [blame] | 1367 | if (!V && VD->isStaticLocal()) |
Fariborz Jahanian | 63326a5 | 2010-04-19 18:15:02 +0000 | [diff] [blame] | 1368 | V = CGM.getStaticLocalDeclAddress(VD); |
Anders Carlsson | 0bc7049 | 2009-11-07 22:46:42 +0000 | [diff] [blame] | 1369 | assert(V && "DeclRefExpr not entered in LocalDeclMap?"); |
| 1370 | |
Fariborz Jahanian | 52a80e1 | 2011-01-26 23:08:27 +0000 | [diff] [blame] | 1371 | if (VD->hasAttr<BlocksAttr>()) |
| 1372 | V = BuildBlockByrefAddress(V, VD); |
| 1373 | |
Anders Carlsson | 0bc7049 | 2009-11-07 22:46:42 +0000 | [diff] [blame] | 1374 | if (VD->getType()->isReferenceType()) |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1375 | V = Builder.CreateLoad(V); |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1376 | |
Chandler Carruth | a98742c | 2011-07-12 08:58:26 +0000 | [diff] [blame] | 1377 | V = EmitBitCastOfLValueToProperType(*this, V, |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1378 | getTypes().ConvertTypeForMem(E->getType())); |
| 1379 | |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1380 | LValue LV = MakeAddrLValue(V, E->getType(), Alignment); |
Fariborz Jahanian | 75f91d6 | 2010-11-19 18:17:09 +0000 | [diff] [blame] | 1381 | if (NonGCable) { |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1382 | LV.getQuals().removeObjCGCAttr(); |
Daniel Dunbar | ea61917 | 2010-08-21 03:22:38 +0000 | [diff] [blame] | 1383 | LV.setNonGC(true); |
| 1384 | } |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1385 | setObjCGCLValueClass(getContext(), E, LV); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 1386 | return LV; |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1387 | } |
John McCall | 5808ce4 | 2011-02-03 08:15:49 +0000 | [diff] [blame] | 1388 | |
| 1389 | if (const FunctionDecl *fn = dyn_cast<FunctionDecl>(ND)) |
| 1390 | return EmitFunctionDeclLValue(*this, E, fn); |
| 1391 | |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1392 | llvm_unreachable("Unhandled DeclRefExpr"); |
Anders Carlsson | 1e74c4f | 2009-11-07 22:53:10 +0000 | [diff] [blame] | 1393 | |
| 1394 | // an invalid LValue, but the assert will |
| 1395 | // ensure that this point is never reached. |
Chris Lattner | b1776cb | 2007-09-16 19:23:47 +0000 | [diff] [blame] | 1396 | return LValue(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1397 | } |
| 1398 | |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 1399 | LValue CodeGenFunction::EmitBlockDeclRefLValue(const BlockDeclRefExpr *E) { |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1400 | unsigned Alignment = |
Fariborz Jahanian | c637d73 | 2011-11-02 22:53:43 +0000 | [diff] [blame] | 1401 | getContext().getDeclAlign(E->getDecl()).getQuantity(); |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1402 | return MakeAddrLValue(GetAddrOfBlockDecl(E), E->getType(), Alignment); |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 1403 | } |
| 1404 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1405 | LValue CodeGenFunction::EmitUnaryOpLValue(const UnaryOperator *E) { |
| 1406 | // __extension__ doesn't affect lvalue-ness. |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1407 | if (E->getOpcode() == UO_Extension) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1408 | return EmitLValue(E->getSubExpr()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1409 | |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 1410 | QualType ExprTy = getContext().getCanonicalType(E->getSubExpr()->getType()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 1411 | switch (E->getOpcode()) { |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1412 | default: llvm_unreachable("Unknown unary operator lvalue!"); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1413 | case UO_Deref: { |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1414 | QualType T = E->getSubExpr()->getType()->getPointeeType(); |
| 1415 | assert(!T.isNull() && "CodeGenFunction::EmitUnaryOpLValue: Illegal type"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1416 | |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1417 | LValue LV = MakeAddrLValue(EmitScalarExpr(E->getSubExpr()), T); |
| 1418 | LV.getQuals().setAddressSpace(ExprTy.getAddressSpace()); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1419 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1420 | // We should not generate __weak write barrier on indirect reference |
| 1421 | // of a pointer to object; as in void foo (__weak id *param); *param = 0; |
| 1422 | // But, we continue to generate __strong write barrier on indirect write |
| 1423 | // into a pointer to object. |
| 1424 | if (getContext().getLangOptions().ObjC1 && |
Douglas Gregor | e289d81 | 2011-09-13 17:21:33 +0000 | [diff] [blame] | 1425 | getContext().getLangOptions().getGC() != LangOptions::NonGC && |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1426 | LV.isObjCWeak()) |
Daniel Dunbar | ea61917 | 2010-08-21 03:22:38 +0000 | [diff] [blame] | 1427 | LV.setNonGC(!E->isOBJCGCCandidate(getContext())); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 1428 | return LV; |
| 1429 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1430 | case UO_Real: |
| 1431 | case UO_Imag: { |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 1432 | LValue LV = EmitLValue(E->getSubExpr()); |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 1433 | assert(LV.isSimple() && "real/imag on non-ordinary l-value"); |
| 1434 | llvm::Value *Addr = LV.getAddress(); |
| 1435 | |
| 1436 | // real and imag are valid on scalars. This is a faster way of |
| 1437 | // testing that. |
| 1438 | if (!cast<llvm::PointerType>(Addr->getType()) |
| 1439 | ->getElementType()->isStructTy()) { |
| 1440 | assert(E->getSubExpr()->getType()->isArithmeticType()); |
| 1441 | return LV; |
| 1442 | } |
| 1443 | |
| 1444 | assert(E->getSubExpr()->getType()->isAnyComplexType()); |
| 1445 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1446 | unsigned Idx = E->getOpcode() == UO_Imag; |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 1447 | return MakeAddrLValue(Builder.CreateStructGEP(LV.getAddress(), |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 1448 | Idx, "idx"), |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 1449 | ExprTy); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 1450 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1451 | case UO_PreInc: |
| 1452 | case UO_PreDec: { |
Chris Lattner | 197a338 | 2010-01-09 21:44:40 +0000 | [diff] [blame] | 1453 | LValue LV = EmitLValue(E->getSubExpr()); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1454 | bool isInc = E->getOpcode() == UO_PreInc; |
Chris Lattner | 197a338 | 2010-01-09 21:44:40 +0000 | [diff] [blame] | 1455 | |
| 1456 | if (E->getType()->isAnyComplexType()) |
| 1457 | EmitComplexPrePostIncDec(E, LV, isInc, true/*isPre*/); |
| 1458 | else |
| 1459 | EmitScalarPrePostIncDec(E, LV, isInc, true/*isPre*/); |
| 1460 | return LV; |
| 1461 | } |
Eli Friedman | e401cd5 | 2009-11-09 04:20:47 +0000 | [diff] [blame] | 1462 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1463 | } |
| 1464 | |
| 1465 | LValue CodeGenFunction::EmitStringLiteralLValue(const StringLiteral *E) { |
Daniel Dunbar | 79c3928 | 2010-08-21 03:15:20 +0000 | [diff] [blame] | 1466 | return MakeAddrLValue(CGM.GetAddrOfConstantStringFromLiteral(E), |
| 1467 | E->getType()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1468 | } |
| 1469 | |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1470 | LValue CodeGenFunction::EmitObjCEncodeExprLValue(const ObjCEncodeExpr *E) { |
Daniel Dunbar | 79c3928 | 2010-08-21 03:15:20 +0000 | [diff] [blame] | 1471 | return MakeAddrLValue(CGM.GetAddrOfConstantStringFromObjCEncode(E), |
| 1472 | E->getType()); |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 1473 | } |
| 1474 | |
| 1475 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1476 | LValue CodeGenFunction::EmitPredefinedLValue(const PredefinedExpr *E) { |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 1477 | switch (E->getIdentType()) { |
| 1478 | default: |
| 1479 | return EmitUnsupportedLValue(E, "predefined expression"); |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1480 | |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 1481 | case PredefinedExpr::Func: |
| 1482 | case PredefinedExpr::Function: |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1483 | case PredefinedExpr::PrettyFunction: { |
| 1484 | unsigned Type = E->getIdentType(); |
| 1485 | std::string GlobalVarName; |
| 1486 | |
| 1487 | switch (Type) { |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1488 | default: llvm_unreachable("Invalid type"); |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1489 | case PredefinedExpr::Func: |
| 1490 | GlobalVarName = "__func__."; |
| 1491 | break; |
| 1492 | case PredefinedExpr::Function: |
| 1493 | GlobalVarName = "__FUNCTION__."; |
| 1494 | break; |
| 1495 | case PredefinedExpr::PrettyFunction: |
| 1496 | GlobalVarName = "__PRETTY_FUNCTION__."; |
| 1497 | break; |
| 1498 | } |
| 1499 | |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1500 | StringRef FnName = CurFn->getName(); |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1501 | if (FnName.startswith("\01")) |
| 1502 | FnName = FnName.substr(1); |
| 1503 | GlobalVarName += FnName; |
| 1504 | |
| 1505 | const Decl *CurDecl = CurCodeDecl; |
| 1506 | if (CurDecl == 0) |
| 1507 | CurDecl = getContext().getTranslationUnitDecl(); |
| 1508 | |
| 1509 | std::string FunctionName = |
John McCall | 6b5a61b | 2011-02-07 10:33:21 +0000 | [diff] [blame] | 1510 | (isa<BlockDecl>(CurDecl) |
| 1511 | ? FnName.str() |
| 1512 | : PredefinedExpr::ComputeName((PredefinedExpr::IdentType)Type, CurDecl)); |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1513 | |
| 1514 | llvm::Constant *C = |
| 1515 | CGM.GetAddrOfConstantCString(FunctionName, GlobalVarName.c_str()); |
Daniel Dunbar | 79c3928 | 2010-08-21 03:15:20 +0000 | [diff] [blame] | 1516 | return MakeAddrLValue(C, E->getType()); |
Daniel Dunbar | 3ec0baf | 2010-08-21 03:01:12 +0000 | [diff] [blame] | 1517 | } |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 1518 | } |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 1519 | } |
| 1520 | |
Mike Stump | d8af360 | 2009-12-15 01:22:35 +0000 | [diff] [blame] | 1521 | llvm::BasicBlock *CodeGenFunction::getTrapBB() { |
Mike Stump | 4151344 | 2009-12-15 00:59:40 +0000 | [diff] [blame] | 1522 | const CodeGenOptions &GCO = CGM.getCodeGenOpts(); |
| 1523 | |
| 1524 | // If we are not optimzing, don't collapse all calls to trap in the function |
| 1525 | // 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] | 1526 | // 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] | 1527 | // to just one per function to save on codesize. |
Chris Lattner | 6c552c1 | 2010-07-20 20:19:24 +0000 | [diff] [blame] | 1528 | if (GCO.OptimizationLevel && TrapBB) |
Mike Stump | 15037ca | 2009-12-15 00:35:12 +0000 | [diff] [blame] | 1529 | return TrapBB; |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1530 | |
| 1531 | llvm::BasicBlock *Cont = 0; |
| 1532 | if (HaveInsertPoint()) { |
| 1533 | Cont = createBasicBlock("cont"); |
| 1534 | EmitBranch(Cont); |
| 1535 | } |
Mike Stump | 15037ca | 2009-12-15 00:35:12 +0000 | [diff] [blame] | 1536 | TrapBB = createBasicBlock("trap"); |
| 1537 | EmitBlock(TrapBB); |
| 1538 | |
Benjamin Kramer | 8dd55a3 | 2011-07-14 17:45:50 +0000 | [diff] [blame] | 1539 | llvm::Value *F = CGM.getIntrinsic(llvm::Intrinsic::trap); |
Mike Stump | 15037ca | 2009-12-15 00:35:12 +0000 | [diff] [blame] | 1540 | llvm::CallInst *TrapCall = Builder.CreateCall(F); |
| 1541 | TrapCall->setDoesNotReturn(); |
| 1542 | TrapCall->setDoesNotThrow(); |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1543 | Builder.CreateUnreachable(); |
| 1544 | |
| 1545 | if (Cont) |
| 1546 | EmitBlock(Cont); |
Mike Stump | 15037ca | 2009-12-15 00:35:12 +0000 | [diff] [blame] | 1547 | return TrapBB; |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1548 | } |
| 1549 | |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1550 | /// isSimpleArrayDecayOperand - If the specified expr is a simple decay from an |
| 1551 | /// array to pointer, return the array subexpression. |
| 1552 | static const Expr *isSimpleArrayDecayOperand(const Expr *E) { |
| 1553 | // If this isn't just an array->pointer decay, bail out. |
| 1554 | const CastExpr *CE = dyn_cast<CastExpr>(E); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1555 | if (CE == 0 || CE->getCastKind() != CK_ArrayToPointerDecay) |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1556 | return 0; |
| 1557 | |
| 1558 | // If this is a decay from variable width array, bail out. |
| 1559 | const Expr *SubExpr = CE->getSubExpr(); |
| 1560 | if (SubExpr->getType()->isVariableArrayType()) |
| 1561 | return 0; |
| 1562 | |
| 1563 | return SubExpr; |
| 1564 | } |
| 1565 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1566 | LValue CodeGenFunction::EmitArraySubscriptExpr(const ArraySubscriptExpr *E) { |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 1567 | // 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] | 1568 | llvm::Value *Idx = EmitScalarExpr(E->getIdx()); |
Eli Friedman | 61d004a | 2009-06-06 19:09:26 +0000 | [diff] [blame] | 1569 | QualType IdxTy = E->getIdx()->getType(); |
Douglas Gregor | 575a1c9 | 2011-05-20 16:38:50 +0000 | [diff] [blame] | 1570 | bool IdxSigned = IdxTy->isSignedIntegerOrEnumerationType(); |
Eli Friedman | 61d004a | 2009-06-06 19:09:26 +0000 | [diff] [blame] | 1571 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1572 | // If the base is a vector type, then we are forming a vector element lvalue |
| 1573 | // with this subscript. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1574 | if (E->getBase()->getType()->isVectorType()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1575 | // Emit the vector as an lvalue to get its address. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1576 | LValue LHS = EmitLValue(E->getBase()); |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 1577 | assert(LHS.isSimple() && "Can only subscript lvalue vectors here!"); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1578 | Idx = Builder.CreateIntCast(Idx, Int32Ty, IdxSigned, "vidx"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1579 | return LValue::MakeVectorElt(LHS.getAddress(), Idx, |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1580 | E->getBase()->getType()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1581 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1582 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 1583 | // Extend or truncate the index type to 32 or 64-bits. |
John McCall | 5936e33 | 2011-02-15 09:22:45 +0000 | [diff] [blame] | 1584 | if (Idx->getType() != IntPtrTy) |
| 1585 | Idx = Builder.CreateIntCast(Idx, IntPtrTy, IdxSigned, "idxprom"); |
Chris Lattner | a4d94ab | 2010-06-26 22:40:46 +0000 | [diff] [blame] | 1586 | |
Mike Stump | b14e62d | 2009-12-16 02:57:00 +0000 | [diff] [blame] | 1587 | // FIXME: As llvm implements the object size checking, this can come out. |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1588 | if (CatchUndefined) { |
Chris Lattner | a4d94ab | 2010-06-26 22:40:46 +0000 | [diff] [blame] | 1589 | if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E->getBase())){ |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1590 | if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr())) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 1591 | if (ICE->getCastKind() == CK_ArrayToPointerDecay) { |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1592 | if (const ConstantArrayType *CAT |
| 1593 | = getContext().getAsConstantArrayType(DRE->getType())) { |
| 1594 | llvm::APInt Size = CAT->getSize(); |
| 1595 | llvm::BasicBlock *Cont = createBasicBlock("cont"); |
Mike Stump | 750c85e | 2009-12-14 22:14:31 +0000 | [diff] [blame] | 1596 | Builder.CreateCondBr(Builder.CreateICmpULE(Idx, |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1597 | llvm::ConstantInt::get(Idx->getType(), Size)), |
Mike Stump | 15037ca | 2009-12-15 00:35:12 +0000 | [diff] [blame] | 1598 | Cont, getTrapBB()); |
Mike Stump | 96a063a | 2009-12-14 20:52:00 +0000 | [diff] [blame] | 1599 | EmitBlock(Cont); |
Mike Stump | 9c276ae | 2009-12-12 01:27:46 +0000 | [diff] [blame] | 1600 | } |
| 1601 | } |
| 1602 | } |
| 1603 | } |
| 1604 | } |
| 1605 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1606 | // We know that the pointer points to a type of the correct size, unless the |
| 1607 | // size is a VLA or Objective-C interface. |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 1608 | llvm::Value *Address = 0; |
Daniel Dunbar | d553408 | 2011-04-01 00:49:43 +0000 | [diff] [blame] | 1609 | unsigned ArrayAlignment = 0; |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1610 | if (const VariableArrayType *vla = |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 1611 | getContext().getAsVariableArrayType(E->getType())) { |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1612 | // The base must be a pointer, which is not an aggregate. Emit |
| 1613 | // it. It needs to be emitted first in case it's what captures |
| 1614 | // the VLA bounds. |
| 1615 | Address = EmitScalarExpr(E->getBase()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1616 | |
John McCall | bc8d40d | 2011-06-24 21:55:10 +0000 | [diff] [blame] | 1617 | // The element count here is the total number of non-VLA elements. |
| 1618 | llvm::Value *numElements = getVLASize(vla).first; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1619 | |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 1620 | // Effectively, the multiply by the VLA size is part of the GEP. |
| 1621 | // GEP indexes are signed, and scaling an index isn't permitted to |
| 1622 | // signed-overflow, so we use the same semantics for our explicit |
| 1623 | // multiply. We suppress this if overflow is not undefined behavior. |
| 1624 | if (getLangOptions().isSignedOverflowDefined()) { |
| 1625 | Idx = Builder.CreateMul(Idx, numElements); |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1626 | Address = Builder.CreateGEP(Address, Idx, "arrayidx"); |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 1627 | } else { |
| 1628 | Idx = Builder.CreateNSWMul(Idx, numElements); |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1629 | Address = Builder.CreateInBoundsGEP(Address, Idx, "arrayidx"); |
John McCall | 913dab2 | 2011-06-25 01:32:37 +0000 | [diff] [blame] | 1630 | } |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1631 | } else if (const ObjCObjectType *OIT = E->getType()->getAs<ObjCObjectType>()){ |
| 1632 | // Indexing over an interface, as in "NSString *P; P[4];" |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1633 | llvm::Value *InterfaceSize = |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 1634 | llvm::ConstantInt::get(Idx->getType(), |
Ken Dyck | 199c3d6 | 2010-01-11 17:06:35 +0000 | [diff] [blame] | 1635 | getContext().getTypeSizeInChars(OIT).getQuantity()); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1636 | |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 1637 | Idx = Builder.CreateMul(Idx, InterfaceSize); |
| 1638 | |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1639 | // The base must be a pointer, which is not an aggregate. Emit it. |
| 1640 | llvm::Value *Base = EmitScalarExpr(E->getBase()); |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1641 | Address = EmitCastToVoidPtr(Base); |
| 1642 | Address = Builder.CreateGEP(Address, Idx, "arrayidx"); |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 1643 | Address = Builder.CreateBitCast(Address, Base->getType()); |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1644 | } else if (const Expr *Array = isSimpleArrayDecayOperand(E->getBase())) { |
| 1645 | // If this is A[i] where A is an array, the frontend will have decayed the |
| 1646 | // base to be a ArrayToPointerDecay implicit cast. While correct, it is |
| 1647 | // inefficient at -O0 to emit a "gep A, 0, 0" when codegen'ing it, then a |
| 1648 | // "gep x, i" here. Emit one "gep A, 0, i". |
| 1649 | assert(Array->getType()->isArrayType() && |
| 1650 | "Array to pointer decay must have array source type!"); |
Daniel Dunbar | d553408 | 2011-04-01 00:49:43 +0000 | [diff] [blame] | 1651 | LValue ArrayLV = EmitLValue(Array); |
| 1652 | llvm::Value *ArrayPtr = ArrayLV.getAddress(); |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1653 | llvm::Value *Zero = llvm::ConstantInt::get(Int32Ty, 0); |
| 1654 | llvm::Value *Args[] = { Zero, Idx }; |
| 1655 | |
Daniel Dunbar | d553408 | 2011-04-01 00:49:43 +0000 | [diff] [blame] | 1656 | // Propagate the alignment from the array itself to the result. |
| 1657 | ArrayAlignment = ArrayLV.getAlignment(); |
| 1658 | |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1659 | if (getContext().getLangOptions().isSignedOverflowDefined()) |
Jay Foad | 0f6ac7c | 2011-07-22 08:16:57 +0000 | [diff] [blame] | 1660 | Address = Builder.CreateGEP(ArrayPtr, Args, "arrayidx"); |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1661 | else |
Jay Foad | 0f6ac7c | 2011-07-22 08:16:57 +0000 | [diff] [blame] | 1662 | Address = Builder.CreateInBoundsGEP(ArrayPtr, Args, "arrayidx"); |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 1663 | } else { |
Chris Lattner | 9269d5c | 2010-06-26 23:03:20 +0000 | [diff] [blame] | 1664 | // The base must be a pointer, which is not an aggregate. Emit it. |
| 1665 | llvm::Value *Base = EmitScalarExpr(E->getBase()); |
Chris Lattner | 2cb4222 | 2011-03-01 00:03:48 +0000 | [diff] [blame] | 1666 | if (getContext().getLangOptions().isSignedOverflowDefined()) |
| 1667 | Address = Builder.CreateGEP(Base, Idx, "arrayidx"); |
| 1668 | else |
| 1669 | Address = Builder.CreateInBoundsGEP(Base, Idx, "arrayidx"); |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 1670 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1671 | |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 1672 | QualType T = E->getBase()->getType()->getPointeeType(); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1673 | assert(!T.isNull() && |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 1674 | "CodeGenFunction::EmitArraySubscriptExpr(): Illegal base type"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1675 | |
Daniel Dunbar | d553408 | 2011-04-01 00:49:43 +0000 | [diff] [blame] | 1676 | // Limit the alignment to that of the result type. |
| 1677 | if (ArrayAlignment) { |
| 1678 | unsigned Align = getContext().getTypeAlignInChars(T).getQuantity(); |
| 1679 | ArrayAlignment = std::min(Align, ArrayAlignment); |
| 1680 | } |
| 1681 | |
| 1682 | LValue LV = MakeAddrLValue(Address, T, ArrayAlignment); |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1683 | LV.getQuals().setAddressSpace(E->getBase()->getType().getAddressSpace()); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1684 | |
Fariborz Jahanian | 643887a | 2009-02-21 23:37:19 +0000 | [diff] [blame] | 1685 | if (getContext().getLangOptions().ObjC1 && |
Douglas Gregor | e289d81 | 2011-09-13 17:21:33 +0000 | [diff] [blame] | 1686 | getContext().getLangOptions().getGC() != LangOptions::NonGC) { |
Daniel Dunbar | ea61917 | 2010-08-21 03:22:38 +0000 | [diff] [blame] | 1687 | LV.setNonGC(!E->isOBJCGCCandidate(getContext())); |
Fariborz Jahanian | b123ea3 | 2009-09-16 21:37:16 +0000 | [diff] [blame] | 1688 | setObjCGCLValueClass(getContext(), E, LV); |
| 1689 | } |
Fariborz Jahanian | 643887a | 2009-02-21 23:37:19 +0000 | [diff] [blame] | 1690 | return LV; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1691 | } |
| 1692 | |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1693 | static |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 1694 | llvm::Constant *GenerateConstantVector(llvm::LLVMContext &VMContext, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1695 | SmallVector<unsigned, 4> &Elts) { |
| 1696 | SmallVector<llvm::Constant*, 4> CElts; |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1697 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1698 | llvm::Type *Int32Ty = llvm::Type::getInt32Ty(VMContext); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1699 | for (unsigned i = 0, e = Elts.size(); i != e; ++i) |
Chris Lattner | 77b89b8 | 2010-06-27 07:15:29 +0000 | [diff] [blame] | 1700 | CElts.push_back(llvm::ConstantInt::get(Int32Ty, Elts[i])); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1701 | |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1702 | return llvm::ConstantVector::get(CElts); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1703 | } |
| 1704 | |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 1705 | LValue CodeGenFunction:: |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 1706 | EmitExtVectorElementExpr(const ExtVectorElementExpr *E) { |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 1707 | // Emit the base vector as an l-value. |
Chris Lattner | 73525de | 2009-02-16 21:11:58 +0000 | [diff] [blame] | 1708 | LValue Base; |
| 1709 | |
| 1710 | // ExtVectorElementExpr's base can either be a vector or pointer to vector. |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1711 | if (E->isArrow()) { |
| 1712 | // If it is a pointer to a vector, emit the address and form an lvalue with |
| 1713 | // it. |
Chris Lattner | 2140e90 | 2009-02-16 22:14:05 +0000 | [diff] [blame] | 1714 | llvm::Value *Ptr = EmitScalarExpr(E->getBase()); |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1715 | const PointerType *PT = E->getBase()->getType()->getAs<PointerType>(); |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1716 | Base = MakeAddrLValue(Ptr, PT->getPointeeType()); |
| 1717 | Base.getQuals().removeObjCGCAttr(); |
John McCall | 7eb0a9e | 2010-11-24 05:12:34 +0000 | [diff] [blame] | 1718 | } else if (E->getBase()->isGLValue()) { |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1719 | // Otherwise, if the base is an lvalue ( as in the case of foo.x.x), |
| 1720 | // emit the base as an lvalue. |
| 1721 | assert(E->getBase()->getType()->isVectorType()); |
| 1722 | Base = EmitLValue(E->getBase()); |
| 1723 | } else { |
| 1724 | // 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] | 1725 | assert(E->getBase()->getType()->isVectorType() && |
Daniel Dunbar | 302c3c2 | 2010-01-04 18:02:28 +0000 | [diff] [blame] | 1726 | "Result must be a vector"); |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1727 | llvm::Value *Vec = EmitScalarExpr(E->getBase()); |
| 1728 | |
Chris Lattner | 0ad57fb | 2009-12-23 21:33:41 +0000 | [diff] [blame] | 1729 | // Store the vector to memory (because LValue wants an address). |
Daniel Dunbar | 195337d | 2010-02-09 02:48:28 +0000 | [diff] [blame] | 1730 | llvm::Value *VecMem = CreateMemTemp(E->getBase()->getType()); |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1731 | Builder.CreateStore(Vec, VecMem); |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1732 | Base = MakeAddrLValue(VecMem, E->getBase()->getType()); |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1733 | } |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1734 | |
| 1735 | QualType type = |
| 1736 | E->getType().withCVRQualifiers(Base.getQuals().getCVRQualifiers()); |
Chris Lattner | 998eab1 | 2009-12-23 21:31:11 +0000 | [diff] [blame] | 1737 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1738 | // Encode the element access list into a vector of unsigned indices. |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1739 | SmallVector<unsigned, 4> Indices; |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1740 | E->getEncodedElementAccess(Indices); |
| 1741 | |
| 1742 | if (Base.isSimple()) { |
John McCall | d16c2cf | 2011-02-08 08:22:06 +0000 | [diff] [blame] | 1743 | llvm::Constant *CV = GenerateConstantVector(getLLVMContext(), Indices); |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1744 | return LValue::MakeExtVectorElt(Base.getAddress(), CV, type); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1745 | } |
| 1746 | assert(Base.isExtVectorElt() && "Can only subscript lvalue vec elts here!"); |
| 1747 | |
| 1748 | llvm::Constant *BaseElts = Base.getExtVectorElts(); |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1749 | SmallVector<llvm::Constant *, 4> CElts; |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1750 | |
| 1751 | for (unsigned i = 0, e = Indices.size(); i != e; ++i) { |
| 1752 | if (isa<llvm::ConstantAggregateZero>(BaseElts)) |
Chris Lattner | 6766586 | 2009-10-28 05:12:07 +0000 | [diff] [blame] | 1753 | CElts.push_back(llvm::ConstantInt::get(Int32Ty, 0)); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1754 | else |
Chris Lattner | 6766586 | 2009-10-28 05:12:07 +0000 | [diff] [blame] | 1755 | CElts.push_back(cast<llvm::Constant>(BaseElts->getOperand(Indices[i]))); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1756 | } |
Chris Lattner | fb018d1 | 2011-02-15 00:14:06 +0000 | [diff] [blame] | 1757 | llvm::Constant *CV = llvm::ConstantVector::get(CElts); |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1758 | return LValue::MakeExtVectorElt(Base.getExtVectorAddr(), CV, type); |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 1759 | } |
| 1760 | |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1761 | LValue CodeGenFunction::EmitMemberExpr(const MemberExpr *E) { |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 1762 | bool isNonGC = false; |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 1763 | Expr *BaseExpr = E->getBase(); |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 1764 | llvm::Value *BaseValue = NULL; |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1765 | Qualifiers BaseQuals; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1766 | |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1767 | // 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] | 1768 | if (E->isArrow()) { |
Devang Patel | 0a96118 | 2007-10-26 18:15:21 +0000 | [diff] [blame] | 1769 | BaseValue = EmitScalarExpr(BaseExpr); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1770 | const PointerType *PTy = |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 1771 | BaseExpr->getType()->getAs<PointerType>(); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1772 | BaseQuals = PTy->getPointeeType().getQualifiers(); |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 1773 | } else { |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1774 | LValue BaseLV = EmitLValue(BaseExpr); |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 1775 | if (BaseLV.isNonGC()) |
| 1776 | isNonGC = true; |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1777 | // FIXME: this isn't right for bitfields. |
| 1778 | BaseValue = BaseLV.getAddress(); |
Fariborz Jahanian | a91d6a6 | 2009-07-29 00:44:13 +0000 | [diff] [blame] | 1779 | QualType BaseTy = BaseExpr->getType(); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1780 | BaseQuals = BaseTy.getQualifiers(); |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1781 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1782 | |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1783 | NamedDecl *ND = E->getMemberDecl(); |
| 1784 | if (FieldDecl *Field = dyn_cast<FieldDecl>(ND)) { |
Anders Carlsson | e6d2a53 | 2010-01-29 05:05:36 +0000 | [diff] [blame] | 1785 | LValue LV = EmitLValueForField(BaseValue, Field, |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1786 | BaseQuals.getCVRQualifiers()); |
Daniel Dunbar | ea61917 | 2010-08-21 03:22:38 +0000 | [diff] [blame] | 1787 | LV.setNonGC(isNonGC); |
Anders Carlsson | ce53f7d | 2009-11-07 23:06:58 +0000 | [diff] [blame] | 1788 | setObjCGCLValueClass(getContext(), E, LV); |
| 1789 | return LV; |
| 1790 | } |
| 1791 | |
Anders Carlsson | 589f9e3 | 2009-11-07 23:16:50 +0000 | [diff] [blame] | 1792 | if (VarDecl *VD = dyn_cast<VarDecl>(ND)) |
| 1793 | return EmitGlobalVarDeclLValue(*this, E, VD); |
Eli Friedman | 9a14630 | 2009-11-26 06:08:14 +0000 | [diff] [blame] | 1794 | |
| 1795 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) |
| 1796 | return EmitFunctionDeclLValue(*this, E, FD); |
| 1797 | |
David Blaikie | b219cfc | 2011-09-23 05:06:16 +0000 | [diff] [blame] | 1798 | llvm_unreachable("Unhandled member declaration!"); |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 1799 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1800 | |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1801 | LValue CodeGenFunction::EmitLValueForBitfield(llvm::Value *BaseValue, |
| 1802 | const FieldDecl *Field, |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 1803 | unsigned CVRQualifiers) { |
Daniel Dunbar | 198bcb4 | 2010-03-31 01:09:11 +0000 | [diff] [blame] | 1804 | const CGRecordLayout &RL = |
| 1805 | CGM.getTypes().getCGRecordLayout(Field->getParent()); |
Daniel Dunbar | 2eec0b2 | 2010-04-05 16:20:44 +0000 | [diff] [blame] | 1806 | const CGBitFieldInfo &Info = RL.getBitFieldInfo(Field); |
Daniel Dunbar | 7f28964 | 2010-04-08 02:59:45 +0000 | [diff] [blame] | 1807 | return LValue::MakeBitfield(BaseValue, Info, |
John McCall | a07398e | 2011-06-16 04:16:24 +0000 | [diff] [blame] | 1808 | Field->getType().withCVRQualifiers(CVRQualifiers)); |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 1809 | } |
| 1810 | |
John McCall | a9976d3 | 2010-05-21 01:18:57 +0000 | [diff] [blame] | 1811 | /// EmitLValueForAnonRecordField - Given that the field is a member of |
| 1812 | /// an anonymous struct or union buried inside a record, and given |
| 1813 | /// that the base value is a pointer to the enclosing record, derive |
| 1814 | /// an lvalue for the ultimate field. |
| 1815 | LValue CodeGenFunction::EmitLValueForAnonRecordField(llvm::Value *BaseValue, |
Francois Pichet | 00eb3f9 | 2010-12-04 09:14:42 +0000 | [diff] [blame] | 1816 | const IndirectFieldDecl *Field, |
John McCall | a9976d3 | 2010-05-21 01:18:57 +0000 | [diff] [blame] | 1817 | unsigned CVRQualifiers) { |
Francois Pichet | 00eb3f9 | 2010-12-04 09:14:42 +0000 | [diff] [blame] | 1818 | IndirectFieldDecl::chain_iterator I = Field->chain_begin(), |
| 1819 | IEnd = Field->chain_end(); |
John McCall | a9976d3 | 2010-05-21 01:18:57 +0000 | [diff] [blame] | 1820 | while (true) { |
Chris Lattner | b644425 | 2011-05-22 22:09:06 +0000 | [diff] [blame] | 1821 | LValue LV = EmitLValueForField(BaseValue, cast<FieldDecl>(*I), |
| 1822 | CVRQualifiers); |
Francois Pichet | 00eb3f9 | 2010-12-04 09:14:42 +0000 | [diff] [blame] | 1823 | if (++I == IEnd) return LV; |
John McCall | a9976d3 | 2010-05-21 01:18:57 +0000 | [diff] [blame] | 1824 | |
| 1825 | assert(LV.isSimple()); |
| 1826 | BaseValue = LV.getAddress(); |
| 1827 | CVRQualifiers |= LV.getVRQualifiers(); |
| 1828 | } |
| 1829 | } |
| 1830 | |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1831 | LValue CodeGenFunction::EmitLValueForField(llvm::Value *baseAddr, |
| 1832 | const FieldDecl *field, |
| 1833 | unsigned cvr) { |
| 1834 | if (field->isBitField()) |
| 1835 | return EmitLValueForBitfield(baseAddr, field, cvr); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 1836 | |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1837 | const RecordDecl *rec = field->getParent(); |
| 1838 | QualType type = field->getType(); |
Eli Friedman | 1e86b34 | 2008-05-29 11:33:25 +0000 | [diff] [blame] | 1839 | |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1840 | bool mayAlias = rec->hasAttr<MayAliasAttr>(); |
| 1841 | |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 1842 | llvm::Value *addr = baseAddr; |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1843 | if (rec->isUnion()) { |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 1844 | // For unions, there is no pointer adjustment. |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1845 | assert(!type->isReferenceType() && "union has reference member"); |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1846 | } else { |
| 1847 | // For structs, we GEP to the field that the record layout suggests. |
| 1848 | unsigned idx = CGM.getTypes().getCGRecordLayout(rec).getLLVMFieldNo(field); |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 1849 | addr = Builder.CreateStructGEP(addr, idx, field->getName()); |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1850 | |
| 1851 | // If this is a reference field, load the reference right now. |
| 1852 | if (const ReferenceType *refType = type->getAs<ReferenceType>()) { |
| 1853 | llvm::LoadInst *load = Builder.CreateLoad(addr, "ref"); |
| 1854 | if (cvr & Qualifiers::Volatile) load->setVolatile(true); |
| 1855 | |
| 1856 | if (CGM.shouldUseTBAA()) { |
| 1857 | llvm::MDNode *tbaa; |
| 1858 | if (mayAlias) |
| 1859 | tbaa = CGM.getTBAAInfo(getContext().CharTy); |
| 1860 | else |
| 1861 | tbaa = CGM.getTBAAInfo(type); |
| 1862 | CGM.DecorateInstruction(load, tbaa); |
| 1863 | } |
| 1864 | |
| 1865 | addr = load; |
| 1866 | mayAlias = false; |
| 1867 | type = refType->getPointeeType(); |
| 1868 | cvr = 0; // qualifiers don't recursively apply to referencee |
| 1869 | } |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 1870 | } |
Chris Lattner | 74339df | 2011-07-10 05:34:54 +0000 | [diff] [blame] | 1871 | |
| 1872 | // Make sure that the address is pointing to the right type. This is critical |
| 1873 | // for both unions and structs. A union needs a bitcast, a struct element |
| 1874 | // will need a bitcast if the LLVM type laid out doesn't match the desired |
| 1875 | // type. |
Chandler Carruth | a98742c | 2011-07-12 08:58:26 +0000 | [diff] [blame] | 1876 | addr = EmitBitCastOfLValueToProperType(*this, addr, |
Chris Lattner | 3a2b657 | 2011-07-12 06:52:18 +0000 | [diff] [blame] | 1877 | CGM.getTypes().ConvertTypeForMem(type), |
| 1878 | field->getName()); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 1879 | |
Julien Lerouge | 77f68bb | 2011-09-09 22:41:49 +0000 | [diff] [blame] | 1880 | if (field->hasAttr<AnnotateAttr>()) |
| 1881 | addr = EmitFieldAnnotations(field, addr); |
| 1882 | |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1883 | unsigned alignment = getContext().getDeclAlign(field).getQuantity(); |
| 1884 | LValue LV = MakeAddrLValue(addr, type, alignment); |
| 1885 | LV.getQuals().addCVRQualifiers(cvr); |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1886 | |
Fariborz Jahanian | fd02ed7 | 2009-09-21 18:54:29 +0000 | [diff] [blame] | 1887 | // __weak attribute on a field is ignored. |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1888 | if (LV.getQuals().getObjCGCAttr() == Qualifiers::Weak) |
| 1889 | LV.getQuals().removeObjCGCAttr(); |
John McCall | bc7fbf0 | 2011-02-26 08:07:02 +0000 | [diff] [blame] | 1890 | |
| 1891 | // Fields of may_alias structs act like 'char' for TBAA purposes. |
| 1892 | // FIXME: this should get propagated down through anonymous structs |
| 1893 | // and unions. |
| 1894 | if (mayAlias && LV.getTBAAInfo()) |
| 1895 | LV.setTBAAInfo(CGM.getTBAAInfo(getContext().CharTy)); |
| 1896 | |
Daniel Dunbar | 6d5eb76 | 2010-08-21 03:44:13 +0000 | [diff] [blame] | 1897 | return LV; |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1898 | } |
| 1899 | |
Anders Carlsson | 06a2970 | 2010-01-29 05:24:29 +0000 | [diff] [blame] | 1900 | LValue |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1901 | CodeGenFunction::EmitLValueForFieldInitialization(llvm::Value *BaseValue, |
| 1902 | const FieldDecl *Field, |
Anders Carlsson | 06a2970 | 2010-01-29 05:24:29 +0000 | [diff] [blame] | 1903 | unsigned CVRQualifiers) { |
| 1904 | QualType FieldType = Field->getType(); |
| 1905 | |
| 1906 | if (!FieldType->isReferenceType()) |
| 1907 | return EmitLValueForField(BaseValue, Field, CVRQualifiers); |
| 1908 | |
Daniel Dunbar | 198bcb4 | 2010-03-31 01:09:11 +0000 | [diff] [blame] | 1909 | const CGRecordLayout &RL = |
| 1910 | CGM.getTypes().getCGRecordLayout(Field->getParent()); |
| 1911 | unsigned idx = RL.getLLVMFieldNo(Field); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1912 | llvm::Value *V = Builder.CreateStructGEP(BaseValue, idx); |
Anders Carlsson | 06a2970 | 2010-01-29 05:24:29 +0000 | [diff] [blame] | 1913 | assert(!FieldType.getObjCGCAttr() && "fields cannot have GC attrs"); |
| 1914 | |
Chris Lattner | 1b5ba85 | 2011-07-10 05:53:24 +0000 | [diff] [blame] | 1915 | |
| 1916 | // Make sure that the address is pointing to the right type. This is critical |
| 1917 | // for both unions and structs. A union needs a bitcast, a struct element |
| 1918 | // will need a bitcast if the LLVM type laid out doesn't match the desired |
| 1919 | // type. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1920 | llvm::Type *llvmType = ConvertTypeForMem(FieldType); |
Chris Lattner | 1b5ba85 | 2011-07-10 05:53:24 +0000 | [diff] [blame] | 1921 | unsigned AS = cast<llvm::PointerType>(V->getType())->getAddressSpace(); |
| 1922 | V = Builder.CreateBitCast(V, llvmType->getPointerTo(AS)); |
| 1923 | |
Daniel Dunbar | 983e3d7 | 2010-08-21 04:20:22 +0000 | [diff] [blame] | 1924 | unsigned Alignment = getContext().getDeclAlign(Field).getQuantity(); |
| 1925 | return MakeAddrLValue(V, FieldType, Alignment); |
Anders Carlsson | 06a2970 | 2010-01-29 05:24:29 +0000 | [diff] [blame] | 1926 | } |
| 1927 | |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1928 | LValue CodeGenFunction::EmitCompoundLiteralLValue(const CompoundLiteralExpr *E){ |
Daniel Dunbar | 1500657 | 2010-02-16 19:43:39 +0000 | [diff] [blame] | 1929 | llvm::Value *DeclPtr = CreateMemTemp(E->getType(), ".compoundliteral"); |
Chris Lattner | d0db03a | 2010-09-06 00:11:41 +0000 | [diff] [blame] | 1930 | const Expr *InitExpr = E->getInitializer(); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 1931 | LValue Result = MakeAddrLValue(DeclPtr, E->getType()); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 1932 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1933 | EmitAnyExprToMem(InitExpr, DeclPtr, E->getType().getQualifiers(), |
| 1934 | /*Init*/ true); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 1935 | |
| 1936 | return Result; |
| 1937 | } |
| 1938 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1939 | LValue CodeGenFunction:: |
| 1940 | EmitConditionalOperatorLValue(const AbstractConditionalOperator *expr) { |
| 1941 | if (!expr->isGLValue()) { |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1942 | // ?: here should be an aggregate. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1943 | assert((hasAggregateLLVMType(expr->getType()) && |
| 1944 | !expr->getType()->isAnyComplexType()) && |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1945 | "Unexpected conditional operator!"); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1946 | return EmitAggExprToLValue(expr); |
Anders Carlsson | 6fcec8b | 2009-09-15 16:35:24 +0000 | [diff] [blame] | 1947 | } |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 1948 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1949 | const Expr *condExpr = expr->getCond(); |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1950 | bool CondExprBool; |
| 1951 | if (ConstantFoldsToSimpleInteger(condExpr, CondExprBool)) { |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1952 | const Expr *live = expr->getTrueExpr(), *dead = expr->getFalseExpr(); |
Chris Lattner | c2c9001 | 2011-02-27 23:02:32 +0000 | [diff] [blame] | 1953 | if (!CondExprBool) std::swap(live, dead); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1954 | |
| 1955 | if (!ContainsLabel(dead)) |
| 1956 | return EmitLValue(live); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1957 | } |
| 1958 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1959 | OpaqueValueMapping binding(*this, expr); |
| 1960 | |
| 1961 | llvm::BasicBlock *lhsBlock = createBasicBlock("cond.true"); |
| 1962 | llvm::BasicBlock *rhsBlock = createBasicBlock("cond.false"); |
| 1963 | llvm::BasicBlock *contBlock = createBasicBlock("cond.end"); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1964 | |
| 1965 | ConditionalEvaluation eval(*this); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1966 | EmitBranchOnBoolExpr(condExpr, lhsBlock, rhsBlock); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1967 | |
| 1968 | // Any temporaries created here are conditional. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1969 | EmitBlock(lhsBlock); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1970 | eval.begin(*this); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1971 | LValue lhs = EmitLValue(expr->getTrueExpr()); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1972 | eval.end(*this); |
| 1973 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1974 | if (!lhs.isSimple()) |
| 1975 | return EmitUnsupportedLValue(expr, "conditional operator"); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1976 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1977 | lhsBlock = Builder.GetInsertBlock(); |
| 1978 | Builder.CreateBr(contBlock); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1979 | |
| 1980 | // Any temporaries created here are conditional. |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1981 | EmitBlock(rhsBlock); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1982 | eval.begin(*this); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1983 | LValue rhs = EmitLValue(expr->getFalseExpr()); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1984 | eval.end(*this); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1985 | if (!rhs.isSimple()) |
| 1986 | return EmitUnsupportedLValue(expr, "conditional operator"); |
| 1987 | rhsBlock = Builder.GetInsertBlock(); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1988 | |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1989 | EmitBlock(contBlock); |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1990 | |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 1991 | llvm::PHINode *phi = Builder.CreatePHI(lhs.getAddress()->getType(), 2, |
John McCall | f99a391 | 2011-01-26 19:21:13 +0000 | [diff] [blame] | 1992 | "cond-lvalue"); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 1993 | phi->addIncoming(lhs.getAddress(), lhsBlock); |
| 1994 | phi->addIncoming(rhs.getAddress(), rhsBlock); |
| 1995 | return MakeAddrLValue(phi, expr->getType()); |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 1996 | } |
| 1997 | |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 1998 | /// EmitCastLValue - Casts are never lvalues unless that cast is a dynamic_cast. |
| 1999 | /// If the cast is a dynamic_cast, we can have the usual lvalue result, |
| 2000 | /// otherwise if a cast is needed by the code generator in an lvalue context, |
| 2001 | /// then it must mean that we need the address of an aggregate in order to |
| 2002 | /// access one of its fields. This can happen for all the reasons that casts |
| 2003 | /// are permitted with aggregate result, including noop aggregate casts, and |
| 2004 | /// cast from scalar to union. |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 2005 | LValue CodeGenFunction::EmitCastLValue(const CastExpr *E) { |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2006 | switch (E->getCastKind()) { |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2007 | case CK_ToVoid: |
Eli Friedman | eaae78a | 2009-11-16 05:48:01 +0000 | [diff] [blame] | 2008 | return EmitUnsupportedLValue(E, "unexpected cast lvalue"); |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2009 | |
| 2010 | case CK_Dependent: |
| 2011 | llvm_unreachable("dependent cast kind in IR gen!"); |
| 2012 | |
John McCall | db45806 | 2011-11-07 03:59:57 +0000 | [diff] [blame^] | 2013 | case CK_GetObjCProperty: llvm_unreachable("GetObjCProperty"); |
John McCall | f6a1648 | 2010-12-04 03:47:34 +0000 | [diff] [blame] | 2014 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2015 | case CK_NoOp: |
Douglas Gregor | b3d5e2f | 2011-01-27 23:22:05 +0000 | [diff] [blame] | 2016 | case CK_LValueToRValue: |
| 2017 | if (!E->getSubExpr()->Classify(getContext()).isPRValue() |
| 2018 | || E->getType()->isRecordType()) |
John McCall | 0e800c9 | 2010-12-04 08:14:53 +0000 | [diff] [blame] | 2019 | return EmitLValue(E->getSubExpr()); |
Douglas Gregor | 7c7a793 | 2010-07-15 18:58:16 +0000 | [diff] [blame] | 2020 | // Fall through to synthesize a temporary. |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2021 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2022 | case CK_BitCast: |
| 2023 | case CK_ArrayToPointerDecay: |
| 2024 | case CK_FunctionToPointerDecay: |
| 2025 | case CK_NullToMemberPointer: |
John McCall | 404cd16 | 2010-11-13 01:35:44 +0000 | [diff] [blame] | 2026 | case CK_NullToPointer: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2027 | case CK_IntegralToPointer: |
| 2028 | case CK_PointerToIntegral: |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2029 | case CK_PointerToBoolean: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2030 | case CK_VectorSplat: |
| 2031 | case CK_IntegralCast: |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2032 | case CK_IntegralToBoolean: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2033 | case CK_IntegralToFloating: |
| 2034 | case CK_FloatingToIntegral: |
John McCall | daa8e4e | 2010-11-15 09:13:47 +0000 | [diff] [blame] | 2035 | case CK_FloatingToBoolean: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2036 | case CK_FloatingCast: |
John McCall | 2bb5d00 | 2010-11-13 09:02:35 +0000 | [diff] [blame] | 2037 | case CK_FloatingRealToComplex: |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 2038 | case CK_FloatingComplexToReal: |
| 2039 | case CK_FloatingComplexToBoolean: |
John McCall | 2bb5d00 | 2010-11-13 09:02:35 +0000 | [diff] [blame] | 2040 | case CK_FloatingComplexCast: |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 2041 | case CK_FloatingComplexToIntegralComplex: |
John McCall | 2bb5d00 | 2010-11-13 09:02:35 +0000 | [diff] [blame] | 2042 | case CK_IntegralRealToComplex: |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 2043 | case CK_IntegralComplexToReal: |
| 2044 | case CK_IntegralComplexToBoolean: |
John McCall | 2bb5d00 | 2010-11-13 09:02:35 +0000 | [diff] [blame] | 2045 | case CK_IntegralComplexCast: |
John McCall | f3ea8cf | 2010-11-14 08:17:51 +0000 | [diff] [blame] | 2046 | case CK_IntegralComplexToFloatingComplex: |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2047 | case CK_DerivedToBaseMemberPointer: |
| 2048 | case CK_BaseToDerivedMemberPointer: |
| 2049 | case CK_MemberPointerToBoolean: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2050 | case CK_AnyPointerToBlockPointerCast: |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 2051 | case CK_ARCProduceObject: |
| 2052 | case CK_ARCConsumeObject: |
| 2053 | case CK_ARCReclaimReturnedObject: |
| 2054 | case CK_ARCExtendBlockObject: { |
Douglas Gregor | 7c7a793 | 2010-07-15 18:58:16 +0000 | [diff] [blame] | 2055 | // These casts only produce lvalues when we're binding a reference to a |
| 2056 | // temporary realized from a (converted) pure rvalue. Emit the expression |
| 2057 | // as a value, copy it into a temporary, and return an lvalue referring to |
| 2058 | // that temporary. |
| 2059 | llvm::Value *V = CreateMemTemp(E->getType(), "ref.temp"); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2060 | EmitAnyExprToMem(E, V, E->getType().getQualifiers(), false); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2061 | return MakeAddrLValue(V, E->getType()); |
Douglas Gregor | 7c7a793 | 2010-07-15 18:58:16 +0000 | [diff] [blame] | 2062 | } |
Eli Friedman | eaae78a | 2009-11-16 05:48:01 +0000 | [diff] [blame] | 2063 | |
Anders Carlsson | 575b374 | 2011-04-11 02:03:26 +0000 | [diff] [blame] | 2064 | case CK_Dynamic: { |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 2065 | LValue LV = EmitLValue(E->getSubExpr()); |
| 2066 | llvm::Value *V = LV.getAddress(); |
| 2067 | const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(E); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2068 | return MakeAddrLValue(EmitDynamicCast(V, DCE), E->getType()); |
Mike Stump | c849c05 | 2009-11-16 06:50:58 +0000 | [diff] [blame] | 2069 | } |
| 2070 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2071 | case CK_ConstructorConversion: |
| 2072 | case CK_UserDefinedConversion: |
John McCall | 1d9b3b2 | 2011-09-09 05:25:32 +0000 | [diff] [blame] | 2073 | case CK_CPointerToObjCPointerCast: |
| 2074 | case CK_BlockPointerToObjCPointerCast: |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 2075 | return EmitLValue(E->getSubExpr()); |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2076 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2077 | case CK_UncheckedDerivedToBase: |
| 2078 | case CK_DerivedToBase: { |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2079 | const RecordType *DerivedClassTy = |
| 2080 | E->getSubExpr()->getType()->getAs<RecordType>(); |
| 2081 | CXXRecordDecl *DerivedClassDecl = |
| 2082 | cast<CXXRecordDecl>(DerivedClassTy->getDecl()); |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2083 | |
| 2084 | LValue LV = EmitLValue(E->getSubExpr()); |
John McCall | 0e800c9 | 2010-12-04 08:14:53 +0000 | [diff] [blame] | 2085 | llvm::Value *This = LV.getAddress(); |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2086 | |
| 2087 | // Perform the derived-to-base conversion |
| 2088 | llvm::Value *Base = |
Fariborz Jahanian | 353b33b | 2010-06-17 23:00:29 +0000 | [diff] [blame] | 2089 | GetAddressOfBaseClass(This, DerivedClassDecl, |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 2090 | E->path_begin(), E->path_end(), |
| 2091 | /*NullCheckValue=*/false); |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2092 | |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2093 | return MakeAddrLValue(Base, E->getType()); |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2094 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2095 | case CK_ToUnion: |
Daniel Dunbar | b2cd777 | 2010-02-05 20:02:42 +0000 | [diff] [blame] | 2096 | return EmitAggExprToLValue(E); |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2097 | case CK_BaseToDerived: { |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 2098 | const RecordType *DerivedClassTy = E->getType()->getAs<RecordType>(); |
| 2099 | CXXRecordDecl *DerivedClassDecl = |
| 2100 | cast<CXXRecordDecl>(DerivedClassTy->getDecl()); |
| 2101 | |
| 2102 | LValue LV = EmitLValue(E->getSubExpr()); |
| 2103 | |
| 2104 | // Perform the base-to-derived conversion |
| 2105 | llvm::Value *Derived = |
Anders Carlsson | a04efdf | 2010-04-24 21:23:59 +0000 | [diff] [blame] | 2106 | GetAddressOfDerivedClass(LV.getAddress(), DerivedClassDecl, |
John McCall | f871d0c | 2010-08-07 06:22:56 +0000 | [diff] [blame] | 2107 | E->path_begin(), E->path_end(), |
| 2108 | /*NullCheckValue=*/false); |
Anders Carlsson | a3697c9 | 2009-11-23 17:57:54 +0000 | [diff] [blame] | 2109 | |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2110 | return MakeAddrLValue(Derived, E->getType()); |
Eli Friedman | eaae78a | 2009-11-16 05:48:01 +0000 | [diff] [blame] | 2111 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2112 | case CK_LValueBitCast: { |
Eli Friedman | eaae78a | 2009-11-16 05:48:01 +0000 | [diff] [blame] | 2113 | // This must be a reinterpret_cast (or c-style equivalent). |
| 2114 | const ExplicitCastExpr *CE = cast<ExplicitCastExpr>(E); |
Anders Carlsson | 658e812 | 2009-11-14 21:21:42 +0000 | [diff] [blame] | 2115 | |
| 2116 | LValue LV = EmitLValue(E->getSubExpr()); |
| 2117 | llvm::Value *V = Builder.CreateBitCast(LV.getAddress(), |
| 2118 | ConvertType(CE->getTypeAsWritten())); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2119 | return MakeAddrLValue(V, E->getType()); |
Anders Carlsson | 658e812 | 2009-11-14 21:21:42 +0000 | [diff] [blame] | 2120 | } |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2121 | case CK_ObjCObjectLValueCast: { |
Douglas Gregor | 569c316 | 2010-08-07 11:51:51 +0000 | [diff] [blame] | 2122 | LValue LV = EmitLValue(E->getSubExpr()); |
| 2123 | QualType ToType = getContext().getLValueReferenceType(E->getType()); |
| 2124 | llvm::Value *V = Builder.CreateBitCast(LV.getAddress(), |
| 2125 | ConvertType(ToType)); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2126 | return MakeAddrLValue(V, E->getType()); |
Douglas Gregor | 569c316 | 2010-08-07 11:51:51 +0000 | [diff] [blame] | 2127 | } |
Anders Carlsson | 0ee33cf | 2009-09-12 16:16:49 +0000 | [diff] [blame] | 2128 | } |
Douglas Gregor | 7c7a793 | 2010-07-15 18:58:16 +0000 | [diff] [blame] | 2129 | |
| 2130 | llvm_unreachable("Unhandled lvalue cast kind?"); |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 2131 | } |
| 2132 | |
Fariborz Jahanian | 48620ba | 2009-10-20 23:29:04 +0000 | [diff] [blame] | 2133 | LValue CodeGenFunction::EmitNullInitializationLValue( |
Douglas Gregor | ed8abf1 | 2010-07-08 06:14:04 +0000 | [diff] [blame] | 2134 | const CXXScalarValueInitExpr *E) { |
Fariborz Jahanian | 48620ba | 2009-10-20 23:29:04 +0000 | [diff] [blame] | 2135 | QualType Ty = E->getType(); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2136 | LValue LV = MakeAddrLValue(CreateMemTemp(Ty), Ty); |
Anders Carlsson | 1884eb0 | 2010-05-22 17:35:42 +0000 | [diff] [blame] | 2137 | EmitNullInitialization(LV.getAddress(), Ty); |
Daniel Dunbar | 195337d | 2010-02-09 02:48:28 +0000 | [diff] [blame] | 2138 | return LV; |
Fariborz Jahanian | 48620ba | 2009-10-20 23:29:04 +0000 | [diff] [blame] | 2139 | } |
| 2140 | |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 2141 | LValue CodeGenFunction::EmitOpaqueValueLValue(const OpaqueValueExpr *e) { |
| 2142 | assert(e->isGLValue() || e->getType()->isRecordType()); |
John McCall | 56ca35d | 2011-02-17 10:25:35 +0000 | [diff] [blame] | 2143 | return getOpaqueLValueMapping(e); |
John McCall | e996ffd | 2011-02-16 08:02:54 +0000 | [diff] [blame] | 2144 | } |
| 2145 | |
Douglas Gregor | 03e8003 | 2011-06-21 17:03:29 +0000 | [diff] [blame] | 2146 | LValue CodeGenFunction::EmitMaterializeTemporaryExpr( |
| 2147 | const MaterializeTemporaryExpr *E) { |
John McCall | cec52f0 | 2011-08-26 21:08:13 +0000 | [diff] [blame] | 2148 | RValue RV = EmitReferenceBindingToExpr(E, /*InitializedDecl=*/0); |
Douglas Gregor | 0b58108 | 2011-06-21 18:20:46 +0000 | [diff] [blame] | 2149 | return MakeAddrLValue(RV.getScalarVal(), E->getType()); |
Douglas Gregor | 03e8003 | 2011-06-21 17:03:29 +0000 | [diff] [blame] | 2150 | } |
| 2151 | |
| 2152 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 2153 | //===--------------------------------------------------------------------===// |
| 2154 | // Expression Emission |
| 2155 | //===--------------------------------------------------------------------===// |
| 2156 | |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 2157 | RValue CodeGenFunction::EmitCallExpr(const CallExpr *E, |
| 2158 | ReturnValueSlot ReturnValue) { |
Eric Christopher | 73fb350 | 2011-10-13 21:45:18 +0000 | [diff] [blame] | 2159 | if (CGDebugInfo *DI = getDebugInfo()) |
| 2160 | DI->EmitLocation(Builder, E->getLocStart()); |
Devang Patel | 79bfb4b | 2011-03-04 18:54:42 +0000 | [diff] [blame] | 2161 | |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 2162 | // Builtins never have block type. |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 2163 | if (E->getCallee()->getType()->isBlockPointerType()) |
Anders Carlsson | a1736c0 | 2009-12-24 21:13:40 +0000 | [diff] [blame] | 2164 | return EmitBlockCallExpr(E, ReturnValue); |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 2165 | |
Anders Carlsson | 774e7c6 | 2009-04-03 22:50:24 +0000 | [diff] [blame] | 2166 | if (const CXXMemberCallExpr *CE = dyn_cast<CXXMemberCallExpr>(E)) |
Anders Carlsson | a1736c0 | 2009-12-24 21:13:40 +0000 | [diff] [blame] | 2167 | return EmitCXXMemberCallExpr(CE, ReturnValue); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2168 | |
Peter Collingbourne | 6c0aa5f | 2011-10-06 18:29:37 +0000 | [diff] [blame] | 2169 | if (const CUDAKernelCallExpr *CE = dyn_cast<CUDAKernelCallExpr>(E)) |
| 2170 | return EmitCUDAKernelCallExpr(CE, ReturnValue); |
| 2171 | |
Douglas Gregor | 1ddc9c4 | 2011-09-06 21:41:04 +0000 | [diff] [blame] | 2172 | const Decl *TargetDecl = E->getCalleeDecl(); |
| 2173 | if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(TargetDecl)) { |
| 2174 | if (unsigned builtinID = FD->getBuiltinID()) |
| 2175 | return EmitBuiltinExpr(FD, builtinID, E); |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 2176 | } |
| 2177 | |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 2178 | if (const CXXOperatorCallExpr *CE = dyn_cast<CXXOperatorCallExpr>(E)) |
Anders Carlsson | 0f29463 | 2009-05-27 04:18:27 +0000 | [diff] [blame] | 2179 | if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(TargetDecl)) |
Anders Carlsson | a1736c0 | 2009-12-24 21:13:40 +0000 | [diff] [blame] | 2180 | return EmitCXXOperatorMemberCallExpr(CE, MD, ReturnValue); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2181 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2182 | if (const CXXPseudoDestructorExpr *PseudoDtor |
| 2183 | = dyn_cast<CXXPseudoDestructorExpr>(E->getCallee()->IgnoreParens())) { |
| 2184 | QualType DestroyedType = PseudoDtor->getDestroyedType(); |
| 2185 | if (getContext().getLangOptions().ObjCAutoRefCount && |
| 2186 | DestroyedType->isObjCLifetimeType() && |
| 2187 | (DestroyedType.getObjCLifetime() == Qualifiers::OCL_Strong || |
| 2188 | DestroyedType.getObjCLifetime() == Qualifiers::OCL_Weak)) { |
Benjamin Kramer | d510fd2 | 2011-06-18 10:34:00 +0000 | [diff] [blame] | 2189 | // Automatic Reference Counting: |
| 2190 | // If the pseudo-expression names a retainable object with weak or |
| 2191 | // strong lifetime, the object shall be released. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2192 | Expr *BaseExpr = PseudoDtor->getBase(); |
| 2193 | llvm::Value *BaseValue = NULL; |
| 2194 | Qualifiers BaseQuals; |
| 2195 | |
Benjamin Kramer | d510fd2 | 2011-06-18 10:34:00 +0000 | [diff] [blame] | 2196 | // 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] | 2197 | if (PseudoDtor->isArrow()) { |
| 2198 | BaseValue = EmitScalarExpr(BaseExpr); |
| 2199 | const PointerType *PTy = BaseExpr->getType()->getAs<PointerType>(); |
| 2200 | BaseQuals = PTy->getPointeeType().getQualifiers(); |
| 2201 | } else { |
| 2202 | LValue BaseLV = EmitLValue(BaseExpr); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2203 | BaseValue = BaseLV.getAddress(); |
| 2204 | QualType BaseTy = BaseExpr->getType(); |
| 2205 | BaseQuals = BaseTy.getQualifiers(); |
| 2206 | } |
| 2207 | |
| 2208 | switch (PseudoDtor->getDestroyedType().getObjCLifetime()) { |
| 2209 | case Qualifiers::OCL_None: |
| 2210 | case Qualifiers::OCL_ExplicitNone: |
| 2211 | case Qualifiers::OCL_Autoreleasing: |
| 2212 | break; |
| 2213 | |
| 2214 | case Qualifiers::OCL_Strong: |
| 2215 | EmitARCRelease(Builder.CreateLoad(BaseValue, |
Benjamin Kramer | d510fd2 | 2011-06-18 10:34:00 +0000 | [diff] [blame] | 2216 | PseudoDtor->getDestroyedType().isVolatileQualified()), |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2217 | /*precise*/ true); |
| 2218 | break; |
| 2219 | |
| 2220 | case Qualifiers::OCL_Weak: |
| 2221 | EmitARCDestroyWeak(BaseValue); |
| 2222 | break; |
| 2223 | } |
| 2224 | } else { |
| 2225 | // C++ [expr.pseudo]p1: |
| 2226 | // The result shall only be used as the operand for the function call |
| 2227 | // operator (), and the result of such a call has type void. The only |
| 2228 | // effect is the evaluation of the postfix-expression before the dot or |
| 2229 | // arrow. |
| 2230 | EmitScalarExpr(E->getCallee()); |
| 2231 | } |
| 2232 | |
Douglas Gregor | a71d819 | 2009-09-04 17:36:40 +0000 | [diff] [blame] | 2233 | return RValue::get(0); |
| 2234 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2235 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 2236 | llvm::Value *Callee = EmitScalarExpr(E->getCallee()); |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 2237 | return EmitCall(E->getCallee()->getType(), Callee, ReturnValue, |
Anders Carlsson | 9864771 | 2009-05-27 01:22:39 +0000 | [diff] [blame] | 2238 | E->arg_begin(), E->arg_end(), TargetDecl); |
Chris Lattner | c5e940f | 2007-08-31 04:44:06 +0000 | [diff] [blame] | 2239 | } |
| 2240 | |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 2241 | LValue CodeGenFunction::EmitBinaryOperatorLValue(const BinaryOperator *E) { |
Chris Lattner | 7a574cc | 2009-05-12 21:28:12 +0000 | [diff] [blame] | 2242 | // 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] | 2243 | if (E->getOpcode() == BO_Comma) { |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 2244 | EmitIgnoredExpr(E->getLHS()); |
Eli Friedman | 130c69e | 2009-12-07 20:18:11 +0000 | [diff] [blame] | 2245 | EnsureInsertPoint(); |
Chris Lattner | 7a574cc | 2009-05-12 21:28:12 +0000 | [diff] [blame] | 2246 | return EmitLValue(E->getRHS()); |
| 2247 | } |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2248 | |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2249 | if (E->getOpcode() == BO_PtrMemD || |
| 2250 | E->getOpcode() == BO_PtrMemI) |
Fariborz Jahanian | 8bfd31f | 2009-10-22 22:57:31 +0000 | [diff] [blame] | 2251 | return EmitPointerToDataMemberBinaryExpr(E); |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 2252 | |
John McCall | 2a41637 | 2010-12-05 02:00:02 +0000 | [diff] [blame] | 2253 | assert(E->getOpcode() == BO_Assign && "unexpected binary l-value"); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2254 | |
| 2255 | // Note that in all of these cases, __block variables need the RHS |
| 2256 | // evaluated first just in case the variable gets moved by the RHS. |
John McCall | 83ce9d4 | 2010-11-16 23:07:28 +0000 | [diff] [blame] | 2257 | |
Anders Carlsson | 86aa0cd | 2009-10-19 18:28:22 +0000 | [diff] [blame] | 2258 | if (!hasAggregateLLVMType(E->getType())) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2259 | switch (E->getLHS()->getType().getObjCLifetime()) { |
| 2260 | case Qualifiers::OCL_Strong: |
| 2261 | return EmitARCStoreStrong(E, /*ignored*/ false).first; |
| 2262 | |
| 2263 | case Qualifiers::OCL_Autoreleasing: |
| 2264 | return EmitARCStoreAutoreleasing(E).first; |
| 2265 | |
| 2266 | // No reason to do any of these differently. |
| 2267 | case Qualifiers::OCL_None: |
| 2268 | case Qualifiers::OCL_ExplicitNone: |
| 2269 | case Qualifiers::OCL_Weak: |
| 2270 | break; |
| 2271 | } |
| 2272 | |
John McCall | cd940a1 | 2010-12-06 06:10:02 +0000 | [diff] [blame] | 2273 | RValue RV = EmitAnyExpr(E->getRHS()); |
Anders Carlsson | 86aa0cd | 2009-10-19 18:28:22 +0000 | [diff] [blame] | 2274 | LValue LV = EmitLValue(E->getLHS()); |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2275 | EmitStoreThroughLValue(RV, LV); |
Anders Carlsson | 86aa0cd | 2009-10-19 18:28:22 +0000 | [diff] [blame] | 2276 | return LV; |
| 2277 | } |
John McCall | 83ce9d4 | 2010-11-16 23:07:28 +0000 | [diff] [blame] | 2278 | |
| 2279 | if (E->getType()->isAnyComplexType()) |
| 2280 | return EmitComplexAssignmentLValue(E); |
| 2281 | |
Daniel Dunbar | 18aba0d | 2010-02-05 19:38:31 +0000 | [diff] [blame] | 2282 | return EmitAggExprToLValue(E); |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 2283 | } |
| 2284 | |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 2285 | LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E) { |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 2286 | RValue RV = EmitCallExpr(E); |
Anders Carlsson | 4826568 | 2009-05-27 01:45:47 +0000 | [diff] [blame] | 2287 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 2288 | if (!RV.isScalar()) |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2289 | return MakeAddrLValue(RV.getAggregateAddr(), E->getType()); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 2290 | |
| 2291 | assert(E->getCallReturnType()->isReferenceType() && |
| 2292 | "Can't have a scalar return unless the return type is a " |
| 2293 | "reference type!"); |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2294 | |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2295 | return MakeAddrLValue(RV.getScalarVal(), E->getType()); |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 2296 | } |
| 2297 | |
Daniel Dunbar | 5b5c9ef | 2009-02-11 20:59:32 +0000 | [diff] [blame] | 2298 | LValue CodeGenFunction::EmitVAArgExprLValue(const VAArgExpr *E) { |
| 2299 | // FIXME: This shouldn't require another copy. |
Daniel Dunbar | 18aba0d | 2010-02-05 19:38:31 +0000 | [diff] [blame] | 2300 | return EmitAggExprToLValue(E); |
Daniel Dunbar | 5b5c9ef | 2009-02-11 20:59:32 +0000 | [diff] [blame] | 2301 | } |
| 2302 | |
Anders Carlsson | b58d017 | 2009-05-30 23:23:33 +0000 | [diff] [blame] | 2303 | LValue CodeGenFunction::EmitCXXConstructLValue(const CXXConstructExpr *E) { |
John McCall | fc1e6c7 | 2010-09-18 00:58:34 +0000 | [diff] [blame] | 2304 | assert(E->getType()->getAsCXXRecordDecl()->hasTrivialDestructor() |
| 2305 | && "binding l-value to type which needs a temporary"); |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 2306 | AggValueSlot Slot = CreateAggTemp(E->getType()); |
John McCall | 558d2ab | 2010-09-15 10:14:12 +0000 | [diff] [blame] | 2307 | EmitCXXConstructExpr(E, Slot); |
| 2308 | return MakeAddrLValue(Slot.getAddr(), E->getType()); |
Anders Carlsson | b58d017 | 2009-05-30 23:23:33 +0000 | [diff] [blame] | 2309 | } |
| 2310 | |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 2311 | LValue |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 2312 | CodeGenFunction::EmitCXXTypeidLValue(const CXXTypeidExpr *E) { |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2313 | return MakeAddrLValue(EmitCXXTypeidExpr(E), E->getType()); |
Mike Stump | c2e84ae | 2009-11-15 08:09:41 +0000 | [diff] [blame] | 2314 | } |
| 2315 | |
| 2316 | LValue |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 2317 | CodeGenFunction::EmitCXXBindTemporaryLValue(const CXXBindTemporaryExpr *E) { |
John McCall | fc1e6c7 | 2010-09-18 00:58:34 +0000 | [diff] [blame] | 2318 | AggValueSlot Slot = CreateAggTemp(E->getType(), "temp.lvalue"); |
John McCall | fd71fb8 | 2011-08-26 08:02:37 +0000 | [diff] [blame] | 2319 | Slot.setExternallyDestructed(); |
John McCall | fc1e6c7 | 2010-09-18 00:58:34 +0000 | [diff] [blame] | 2320 | EmitAggExpr(E->getSubExpr(), Slot); |
| 2321 | EmitCXXTemporary(E->getTemporary(), Slot.getAddr()); |
| 2322 | return MakeAddrLValue(Slot.getAddr(), E->getType()); |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 2323 | } |
| 2324 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 2325 | LValue CodeGenFunction::EmitObjCMessageExprLValue(const ObjCMessageExpr *E) { |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 2326 | RValue RV = EmitObjCMessageExpr(E); |
Anders Carlsson | 7e70fb2 | 2010-06-21 20:59:55 +0000 | [diff] [blame] | 2327 | |
| 2328 | if (!RV.isScalar()) |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2329 | return MakeAddrLValue(RV.getAggregateAddr(), E->getType()); |
Anders Carlsson | 7e70fb2 | 2010-06-21 20:59:55 +0000 | [diff] [blame] | 2330 | |
| 2331 | assert(E->getMethodDecl()->getResultType()->isReferenceType() && |
| 2332 | "Can't have a scalar return unless the return type is a " |
| 2333 | "reference type!"); |
| 2334 | |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2335 | return MakeAddrLValue(RV.getScalarVal(), E->getType()); |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 2336 | } |
| 2337 | |
Fariborz Jahanian | 03b2960 | 2010-06-17 19:56:20 +0000 | [diff] [blame] | 2338 | LValue CodeGenFunction::EmitObjCSelectorLValue(const ObjCSelectorExpr *E) { |
| 2339 | llvm::Value *V = |
| 2340 | CGM.getObjCRuntime().GetSelector(Builder, E->getSelector(), true); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2341 | return MakeAddrLValue(V, E->getType()); |
Fariborz Jahanian | 03b2960 | 2010-06-17 19:56:20 +0000 | [diff] [blame] | 2342 | } |
| 2343 | |
Daniel Dunbar | 2a03192 | 2009-04-22 05:08:15 +0000 | [diff] [blame] | 2344 | llvm::Value *CodeGenFunction::EmitIvarOffset(const ObjCInterfaceDecl *Interface, |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 2345 | const ObjCIvarDecl *Ivar) { |
Fariborz Jahanian | f63aa3f | 2009-02-10 19:02:04 +0000 | [diff] [blame] | 2346 | return CGM.getObjCRuntime().EmitIvarOffset(*this, Interface, Ivar); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 2347 | } |
| 2348 | |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 2349 | LValue CodeGenFunction::EmitLValueForIvar(QualType ObjectTy, |
| 2350 | llvm::Value *BaseValue, |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 2351 | const ObjCIvarDecl *Ivar, |
| 2352 | unsigned CVRQualifiers) { |
Chris Lattner | 26f074b | 2009-04-17 17:44:48 +0000 | [diff] [blame] | 2353 | return CGM.getObjCRuntime().EmitObjCValueForIvar(*this, ObjectTy, BaseValue, |
Daniel Dunbar | 525c9b7 | 2009-04-21 01:19:28 +0000 | [diff] [blame] | 2354 | Ivar, CVRQualifiers); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 2355 | } |
| 2356 | |
| 2357 | LValue CodeGenFunction::EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E) { |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 2358 | // FIXME: A lot of the code below could be shared with EmitMemberExpr. |
| 2359 | llvm::Value *BaseValue = 0; |
| 2360 | const Expr *BaseExpr = E->getBase(); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 2361 | Qualifiers BaseQuals; |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 2362 | QualType ObjectTy; |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 2363 | if (E->isArrow()) { |
| 2364 | BaseValue = EmitScalarExpr(BaseExpr); |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 2365 | ObjectTy = BaseExpr->getType()->getPointeeType(); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 2366 | BaseQuals = ObjectTy.getQualifiers(); |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 2367 | } else { |
| 2368 | LValue BaseLV = EmitLValue(BaseExpr); |
| 2369 | // FIXME: this isn't right for bitfields. |
| 2370 | BaseValue = BaseLV.getAddress(); |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 2371 | ObjectTy = BaseExpr->getType(); |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 2372 | BaseQuals = ObjectTy.getQualifiers(); |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 2373 | } |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 2374 | |
Fariborz Jahanian | dbf3cfd | 2009-09-16 23:11:23 +0000 | [diff] [blame] | 2375 | LValue LV = |
John McCall | 0953e76 | 2009-09-24 19:53:00 +0000 | [diff] [blame] | 2376 | EmitLValueForIvar(ObjectTy, BaseValue, E->getDecl(), |
| 2377 | BaseQuals.getCVRQualifiers()); |
Fariborz Jahanian | dbf3cfd | 2009-09-16 23:11:23 +0000 | [diff] [blame] | 2378 | setObjCGCLValueClass(getContext(), E, LV); |
| 2379 | return LV; |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 2380 | } |
| 2381 | |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 2382 | LValue CodeGenFunction::EmitStmtExprLValue(const StmtExpr *E) { |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 2383 | // Can only get l-value for message expression returning aggregate type |
| 2384 | RValue RV = EmitAnyExprToTemp(E); |
Daniel Dunbar | 9f553f5 | 2010-08-21 03:08:16 +0000 | [diff] [blame] | 2385 | return MakeAddrLValue(RV.getAggregateAddr(), E->getType()); |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 2386 | } |
| 2387 | |
Anders Carlsson | 31777a2 | 2009-12-24 19:08:58 +0000 | [diff] [blame] | 2388 | RValue CodeGenFunction::EmitCall(QualType CalleeType, llvm::Value *Callee, |
Anders Carlsson | d2490a9 | 2009-12-24 20:40:36 +0000 | [diff] [blame] | 2389 | ReturnValueSlot ReturnValue, |
Anders Carlsson | 9864771 | 2009-05-27 01:22:39 +0000 | [diff] [blame] | 2390 | CallExpr::const_arg_iterator ArgBeg, |
| 2391 | CallExpr::const_arg_iterator ArgEnd, |
| 2392 | const Decl *TargetDecl) { |
Mike Stump | db52dcd | 2009-09-09 13:00:44 +0000 | [diff] [blame] | 2393 | // Get the actual function type. The callee type will always be a pointer to |
| 2394 | // function type or a block pointer type. |
| 2395 | assert(CalleeType->isFunctionPointerType() && |
Anders Carlsson | 8ac67a7 | 2009-04-07 18:53:02 +0000 | [diff] [blame] | 2396 | "Call must have function pointer type!"); |
| 2397 | |
John McCall | 00a1ad9 | 2009-10-23 08:22:42 +0000 | [diff] [blame] | 2398 | CalleeType = getContext().getCanonicalType(CalleeType); |
| 2399 | |
John McCall | 04a67a6 | 2010-02-05 21:31:56 +0000 | [diff] [blame] | 2400 | const FunctionType *FnType |
| 2401 | = cast<FunctionType>(cast<PointerType>(CalleeType)->getPointeeType()); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 2402 | |
| 2403 | CallArgList Args; |
John McCall | 00a1ad9 | 2009-10-23 08:22:42 +0000 | [diff] [blame] | 2404 | EmitCallArgs(Args, dyn_cast<FunctionProtoType>(FnType), ArgBeg, ArgEnd); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 2405 | |
John McCall | 01f151e | 2011-09-21 08:08:30 +0000 | [diff] [blame] | 2406 | const CGFunctionInfo &FnInfo = CGM.getTypes().getFunctionInfo(Args, FnType); |
| 2407 | |
| 2408 | // C99 6.5.2.2p6: |
| 2409 | // If the expression that denotes the called function has a type |
| 2410 | // that does not include a prototype, [the default argument |
| 2411 | // promotions are performed]. If the number of arguments does not |
| 2412 | // equal the number of parameters, the behavior is undefined. If |
| 2413 | // the function is defined with a type that includes a prototype, |
| 2414 | // and either the prototype ends with an ellipsis (, ...) or the |
| 2415 | // types of the arguments after promotion are not compatible with |
| 2416 | // the types of the parameters, the behavior is undefined. If the |
| 2417 | // function is defined with a type that does not include a |
| 2418 | // prototype, and the types of the arguments after promotion are |
| 2419 | // not compatible with those of the parameters after promotion, |
| 2420 | // the behavior is undefined [except in some trivial cases]. |
| 2421 | // That is, in the general case, we should assume that a call |
| 2422 | // through an unprototyped function type works like a *non-variadic* |
| 2423 | // call. The way we make this work is to cast to the exact type |
| 2424 | // of the promoted arguments. |
| 2425 | if (isa<FunctionNoProtoType>(FnType) && |
| 2426 | !getTargetHooks().isNoProtoCallVariadic(FnType->getCallConv())) { |
| 2427 | assert(cast<llvm::FunctionType>(Callee->getType()->getContainedType(0)) |
| 2428 | ->isVarArg()); |
| 2429 | llvm::Type *CalleeTy = getTypes().GetFunctionType(FnInfo, false); |
| 2430 | CalleeTy = CalleeTy->getPointerTo(); |
| 2431 | Callee = Builder.CreateBitCast(Callee, CalleeTy, "callee.knr.cast"); |
| 2432 | } |
| 2433 | |
| 2434 | return EmitCall(FnInfo, Callee, ReturnValue, Args, TargetDecl); |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 2435 | } |
Fariborz Jahanian | 8bfd31f | 2009-10-22 22:57:31 +0000 | [diff] [blame] | 2436 | |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 2437 | LValue CodeGenFunction:: |
| 2438 | EmitPointerToDataMemberBinaryExpr(const BinaryOperator *E) { |
Eli Friedman | 1c5c1a0 | 2009-11-18 05:01:17 +0000 | [diff] [blame] | 2439 | llvm::Value *BaseV; |
John McCall | 2de56d1 | 2010-08-25 11:45:40 +0000 | [diff] [blame] | 2440 | if (E->getOpcode() == BO_PtrMemI) |
Eli Friedman | 1c5c1a0 | 2009-11-18 05:01:17 +0000 | [diff] [blame] | 2441 | BaseV = EmitScalarExpr(E->getLHS()); |
| 2442 | else |
| 2443 | BaseV = EmitLValue(E->getLHS()).getAddress(); |
Chris Lattner | eb99b01 | 2009-10-28 17:39:19 +0000 | [diff] [blame] | 2444 | |
John McCall | 6c2ab1d | 2010-08-31 21:07:20 +0000 | [diff] [blame] | 2445 | llvm::Value *OffsetV = EmitScalarExpr(E->getRHS()); |
| 2446 | |
| 2447 | const MemberPointerType *MPT |
| 2448 | = E->getRHS()->getType()->getAs<MemberPointerType>(); |
| 2449 | |
| 2450 | llvm::Value *AddV = |
| 2451 | CGM.getCXXABI().EmitMemberDataPointerAddress(*this, BaseV, OffsetV, MPT); |
| 2452 | |
| 2453 | return MakeAddrLValue(AddV, MPT->getPointeeType()); |
Fariborz Jahanian | 8bfd31f | 2009-10-22 22:57:31 +0000 | [diff] [blame] | 2454 | } |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 2455 | |
| 2456 | static void |
| 2457 | EmitAtomicOp(CodeGenFunction &CGF, AtomicExpr *E, llvm::Value *Dest, |
| 2458 | llvm::Value *Ptr, llvm::Value *Val1, llvm::Value *Val2, |
| 2459 | uint64_t Size, unsigned Align, llvm::AtomicOrdering Order) { |
| 2460 | if (E->isCmpXChg()) { |
| 2461 | // Note that cmpxchg only supports specifying one ordering and |
| 2462 | // doesn't support weak cmpxchg, at least at the moment. |
| 2463 | llvm::LoadInst *LoadVal1 = CGF.Builder.CreateLoad(Val1); |
| 2464 | LoadVal1->setAlignment(Align); |
| 2465 | llvm::LoadInst *LoadVal2 = CGF.Builder.CreateLoad(Val2); |
| 2466 | LoadVal2->setAlignment(Align); |
| 2467 | llvm::AtomicCmpXchgInst *CXI = |
| 2468 | CGF.Builder.CreateAtomicCmpXchg(Ptr, LoadVal1, LoadVal2, Order); |
| 2469 | CXI->setVolatile(E->isVolatile()); |
| 2470 | llvm::StoreInst *StoreVal1 = CGF.Builder.CreateStore(CXI, Val1); |
| 2471 | StoreVal1->setAlignment(Align); |
| 2472 | llvm::Value *Cmp = CGF.Builder.CreateICmpEQ(CXI, LoadVal1); |
| 2473 | CGF.EmitStoreOfScalar(Cmp, CGF.MakeAddrLValue(Dest, E->getType())); |
| 2474 | return; |
| 2475 | } |
| 2476 | |
| 2477 | if (E->getOp() == AtomicExpr::Load) { |
| 2478 | llvm::LoadInst *Load = CGF.Builder.CreateLoad(Ptr); |
| 2479 | Load->setAtomic(Order); |
| 2480 | Load->setAlignment(Size); |
| 2481 | Load->setVolatile(E->isVolatile()); |
| 2482 | llvm::StoreInst *StoreDest = CGF.Builder.CreateStore(Load, Dest); |
| 2483 | StoreDest->setAlignment(Align); |
| 2484 | return; |
| 2485 | } |
| 2486 | |
| 2487 | if (E->getOp() == AtomicExpr::Store) { |
| 2488 | assert(!Dest && "Store does not return a value"); |
| 2489 | llvm::LoadInst *LoadVal1 = CGF.Builder.CreateLoad(Val1); |
| 2490 | LoadVal1->setAlignment(Align); |
| 2491 | llvm::StoreInst *Store = CGF.Builder.CreateStore(LoadVal1, Ptr); |
| 2492 | Store->setAtomic(Order); |
| 2493 | Store->setAlignment(Size); |
| 2494 | Store->setVolatile(E->isVolatile()); |
| 2495 | return; |
| 2496 | } |
| 2497 | |
| 2498 | llvm::AtomicRMWInst::BinOp Op = llvm::AtomicRMWInst::Add; |
| 2499 | switch (E->getOp()) { |
| 2500 | case AtomicExpr::CmpXchgWeak: |
| 2501 | case AtomicExpr::CmpXchgStrong: |
| 2502 | case AtomicExpr::Store: |
| 2503 | case AtomicExpr::Load: assert(0 && "Already handled!"); |
| 2504 | case AtomicExpr::Add: Op = llvm::AtomicRMWInst::Add; break; |
| 2505 | case AtomicExpr::Sub: Op = llvm::AtomicRMWInst::Sub; break; |
| 2506 | case AtomicExpr::And: Op = llvm::AtomicRMWInst::And; break; |
| 2507 | case AtomicExpr::Or: Op = llvm::AtomicRMWInst::Or; break; |
| 2508 | case AtomicExpr::Xor: Op = llvm::AtomicRMWInst::Xor; break; |
| 2509 | case AtomicExpr::Xchg: Op = llvm::AtomicRMWInst::Xchg; break; |
| 2510 | } |
| 2511 | llvm::LoadInst *LoadVal1 = CGF.Builder.CreateLoad(Val1); |
| 2512 | LoadVal1->setAlignment(Align); |
| 2513 | llvm::AtomicRMWInst *RMWI = |
| 2514 | CGF.Builder.CreateAtomicRMW(Op, Ptr, LoadVal1, Order); |
| 2515 | RMWI->setVolatile(E->isVolatile()); |
| 2516 | llvm::StoreInst *StoreDest = CGF.Builder.CreateStore(RMWI, Dest); |
| 2517 | StoreDest->setAlignment(Align); |
| 2518 | } |
| 2519 | |
| 2520 | // This function emits any expression (scalar, complex, or aggregate) |
| 2521 | // into a temporary alloca. |
| 2522 | static llvm::Value * |
| 2523 | EmitValToTemp(CodeGenFunction &CGF, Expr *E) { |
| 2524 | llvm::Value *DeclPtr = CGF.CreateMemTemp(E->getType(), ".atomictmp"); |
| 2525 | CGF.EmitAnyExprToMem(E, DeclPtr, E->getType().getQualifiers(), |
| 2526 | /*Init*/ true); |
| 2527 | return DeclPtr; |
| 2528 | } |
| 2529 | |
| 2530 | static RValue ConvertTempToRValue(CodeGenFunction &CGF, QualType Ty, |
| 2531 | llvm::Value *Dest) { |
| 2532 | if (Ty->isAnyComplexType()) |
| 2533 | return RValue::getComplex(CGF.LoadComplexFromAddr(Dest, false)); |
| 2534 | if (CGF.hasAggregateLLVMType(Ty)) |
| 2535 | return RValue::getAggregate(Dest); |
| 2536 | return RValue::get(CGF.EmitLoadOfScalar(CGF.MakeAddrLValue(Dest, Ty))); |
| 2537 | } |
| 2538 | |
| 2539 | RValue CodeGenFunction::EmitAtomicExpr(AtomicExpr *E, llvm::Value *Dest) { |
| 2540 | QualType AtomicTy = E->getPtr()->getType()->getPointeeType(); |
| 2541 | QualType MemTy = AtomicTy->getAs<AtomicType>()->getValueType(); |
| 2542 | CharUnits sizeChars = getContext().getTypeSizeInChars(AtomicTy); |
| 2543 | uint64_t Size = sizeChars.getQuantity(); |
| 2544 | CharUnits alignChars = getContext().getTypeAlignInChars(AtomicTy); |
| 2545 | unsigned Align = alignChars.getQuantity(); |
Eli Friedman | 2be4607 | 2011-10-14 20:59:01 +0000 | [diff] [blame] | 2546 | unsigned MaxInlineWidth = |
| 2547 | getContext().getTargetInfo().getMaxAtomicInlineWidth(); |
| 2548 | bool UseLibcall = (Size != Align || Size > MaxInlineWidth); |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 2549 | |
| 2550 | llvm::Value *Ptr, *Order, *OrderFail = 0, *Val1 = 0, *Val2 = 0; |
| 2551 | Ptr = EmitScalarExpr(E->getPtr()); |
| 2552 | Order = EmitScalarExpr(E->getOrder()); |
| 2553 | if (E->isCmpXChg()) { |
| 2554 | Val1 = EmitScalarExpr(E->getVal1()); |
| 2555 | Val2 = EmitValToTemp(*this, E->getVal2()); |
| 2556 | OrderFail = EmitScalarExpr(E->getOrderFail()); |
| 2557 | (void)OrderFail; // OrderFail is unused at the moment |
| 2558 | } else if ((E->getOp() == AtomicExpr::Add || E->getOp() == AtomicExpr::Sub) && |
| 2559 | MemTy->isPointerType()) { |
| 2560 | // For pointers, we're required to do a bit of math: adding 1 to an int* |
| 2561 | // is not the same as adding 1 to a uintptr_t. |
| 2562 | QualType Val1Ty = E->getVal1()->getType(); |
| 2563 | llvm::Value *Val1Scalar = EmitScalarExpr(E->getVal1()); |
Eli Friedman | 2be4607 | 2011-10-14 20:59:01 +0000 | [diff] [blame] | 2564 | CharUnits PointeeIncAmt = |
| 2565 | getContext().getTypeSizeInChars(MemTy->getPointeeType()); |
| 2566 | Val1Scalar = Builder.CreateMul(Val1Scalar, CGM.getSize(PointeeIncAmt)); |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 2567 | Val1 = CreateMemTemp(Val1Ty, ".atomictmp"); |
| 2568 | EmitStoreOfScalar(Val1Scalar, MakeAddrLValue(Val1, Val1Ty)); |
| 2569 | } else if (E->getOp() != AtomicExpr::Load) { |
| 2570 | Val1 = EmitValToTemp(*this, E->getVal1()); |
| 2571 | } |
| 2572 | |
| 2573 | if (E->getOp() != AtomicExpr::Store && !Dest) |
| 2574 | Dest = CreateMemTemp(E->getType(), ".atomicdst"); |
| 2575 | |
| 2576 | if (UseLibcall) { |
| 2577 | // FIXME: Finalize what the libcalls are actually supposed to look like. |
| 2578 | // See also http://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary . |
| 2579 | return EmitUnsupportedRValue(E, "atomic library call"); |
| 2580 | } |
| 2581 | #if 0 |
| 2582 | if (UseLibcall) { |
| 2583 | const char* LibCallName; |
| 2584 | switch (E->getOp()) { |
| 2585 | case AtomicExpr::CmpXchgWeak: |
| 2586 | LibCallName = "__atomic_compare_exchange_generic"; break; |
| 2587 | case AtomicExpr::CmpXchgStrong: |
| 2588 | LibCallName = "__atomic_compare_exchange_generic"; break; |
| 2589 | case AtomicExpr::Add: LibCallName = "__atomic_fetch_add_generic"; break; |
| 2590 | case AtomicExpr::Sub: LibCallName = "__atomic_fetch_sub_generic"; break; |
| 2591 | case AtomicExpr::And: LibCallName = "__atomic_fetch_and_generic"; break; |
| 2592 | case AtomicExpr::Or: LibCallName = "__atomic_fetch_or_generic"; break; |
| 2593 | case AtomicExpr::Xor: LibCallName = "__atomic_fetch_xor_generic"; break; |
| 2594 | case AtomicExpr::Xchg: LibCallName = "__atomic_exchange_generic"; break; |
| 2595 | case AtomicExpr::Store: LibCallName = "__atomic_store_generic"; break; |
| 2596 | case AtomicExpr::Load: LibCallName = "__atomic_load_generic"; break; |
| 2597 | } |
| 2598 | llvm::SmallVector<QualType, 4> Params; |
| 2599 | CallArgList Args; |
| 2600 | QualType RetTy = getContext().VoidTy; |
| 2601 | if (E->getOp() != AtomicExpr::Store && !E->isCmpXChg()) |
| 2602 | Args.add(RValue::get(EmitCastToVoidPtr(Dest)), |
| 2603 | getContext().VoidPtrTy); |
| 2604 | Args.add(RValue::get(EmitCastToVoidPtr(Ptr)), |
| 2605 | getContext().VoidPtrTy); |
| 2606 | if (E->getOp() != AtomicExpr::Load) |
| 2607 | Args.add(RValue::get(EmitCastToVoidPtr(Val1)), |
| 2608 | getContext().VoidPtrTy); |
| 2609 | if (E->isCmpXChg()) { |
| 2610 | Args.add(RValue::get(EmitCastToVoidPtr(Val2)), |
| 2611 | getContext().VoidPtrTy); |
| 2612 | RetTy = getContext().IntTy; |
| 2613 | } |
| 2614 | Args.add(RValue::get(llvm::ConstantInt::get(SizeTy, Size)), |
| 2615 | getContext().getSizeType()); |
| 2616 | const CGFunctionInfo &FuncInfo = |
| 2617 | CGM.getTypes().getFunctionInfo(RetTy, Args, FunctionType::ExtInfo()); |
| 2618 | llvm::FunctionType *FTy = CGM.getTypes().GetFunctionType(FuncInfo, false); |
| 2619 | llvm::Constant *Func = CGM.CreateRuntimeFunction(FTy, LibCallName); |
| 2620 | RValue Res = EmitCall(FuncInfo, Func, ReturnValueSlot(), Args); |
| 2621 | if (E->isCmpXChg()) |
| 2622 | return Res; |
| 2623 | if (E->getOp() == AtomicExpr::Store) |
| 2624 | return RValue::get(0); |
| 2625 | return ConvertTempToRValue(*this, E->getType(), Dest); |
| 2626 | } |
| 2627 | #endif |
| 2628 | llvm::Type *IPtrTy = |
| 2629 | llvm::IntegerType::get(getLLVMContext(), Size * 8)->getPointerTo(); |
| 2630 | llvm::Value *OrigDest = Dest; |
| 2631 | Ptr = Builder.CreateBitCast(Ptr, IPtrTy); |
| 2632 | if (Val1) Val1 = Builder.CreateBitCast(Val1, IPtrTy); |
| 2633 | if (Val2) Val2 = Builder.CreateBitCast(Val2, IPtrTy); |
| 2634 | if (Dest && !E->isCmpXChg()) Dest = Builder.CreateBitCast(Dest, IPtrTy); |
| 2635 | |
| 2636 | if (isa<llvm::ConstantInt>(Order)) { |
| 2637 | int ord = cast<llvm::ConstantInt>(Order)->getZExtValue(); |
| 2638 | switch (ord) { |
| 2639 | case 0: // memory_order_relaxed |
| 2640 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2641 | llvm::Monotonic); |
| 2642 | break; |
| 2643 | case 1: // memory_order_consume |
| 2644 | case 2: // memory_order_acquire |
| 2645 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2646 | llvm::Acquire); |
| 2647 | break; |
| 2648 | case 3: // memory_order_release |
| 2649 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2650 | llvm::Release); |
| 2651 | break; |
| 2652 | case 4: // memory_order_acq_rel |
| 2653 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2654 | llvm::AcquireRelease); |
| 2655 | break; |
| 2656 | case 5: // memory_order_seq_cst |
| 2657 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2658 | llvm::SequentiallyConsistent); |
| 2659 | break; |
| 2660 | default: // invalid order |
| 2661 | // We should not ever get here normally, but it's hard to |
| 2662 | // enforce that in general. |
| 2663 | break; |
| 2664 | } |
| 2665 | if (E->getOp() == AtomicExpr::Store) |
| 2666 | return RValue::get(0); |
| 2667 | return ConvertTempToRValue(*this, E->getType(), OrigDest); |
| 2668 | } |
| 2669 | |
| 2670 | // Long case, when Order isn't obviously constant. |
| 2671 | |
| 2672 | // Create all the relevant BB's |
Eli Friedman | 9e3c20b | 2011-10-11 20:00:47 +0000 | [diff] [blame] | 2673 | llvm::BasicBlock *MonotonicBB = 0, *AcquireBB = 0, *ReleaseBB = 0, |
| 2674 | *AcqRelBB = 0, *SeqCstBB = 0; |
Eli Friedman | 276b061 | 2011-10-11 02:20:01 +0000 | [diff] [blame] | 2675 | MonotonicBB = createBasicBlock("monotonic", CurFn); |
| 2676 | if (E->getOp() != AtomicExpr::Store) |
| 2677 | AcquireBB = createBasicBlock("acquire", CurFn); |
| 2678 | if (E->getOp() != AtomicExpr::Load) |
| 2679 | ReleaseBB = createBasicBlock("release", CurFn); |
| 2680 | if (E->getOp() != AtomicExpr::Load && E->getOp() != AtomicExpr::Store) |
| 2681 | AcqRelBB = createBasicBlock("acqrel", CurFn); |
| 2682 | SeqCstBB = createBasicBlock("seqcst", CurFn); |
| 2683 | llvm::BasicBlock *ContBB = createBasicBlock("atomic.continue", CurFn); |
| 2684 | |
| 2685 | // Create the switch for the split |
| 2686 | // MonotonicBB is arbitrarily chosen as the default case; in practice, this |
| 2687 | // doesn't matter unless someone is crazy enough to use something that |
| 2688 | // doesn't fold to a constant for the ordering. |
| 2689 | Order = Builder.CreateIntCast(Order, Builder.getInt32Ty(), false); |
| 2690 | llvm::SwitchInst *SI = Builder.CreateSwitch(Order, MonotonicBB); |
| 2691 | |
| 2692 | // Emit all the different atomics |
| 2693 | Builder.SetInsertPoint(MonotonicBB); |
| 2694 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2695 | llvm::Monotonic); |
| 2696 | Builder.CreateBr(ContBB); |
| 2697 | if (E->getOp() != AtomicExpr::Store) { |
| 2698 | Builder.SetInsertPoint(AcquireBB); |
| 2699 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2700 | llvm::Acquire); |
| 2701 | Builder.CreateBr(ContBB); |
| 2702 | SI->addCase(Builder.getInt32(1), AcquireBB); |
| 2703 | SI->addCase(Builder.getInt32(2), AcquireBB); |
| 2704 | } |
| 2705 | if (E->getOp() != AtomicExpr::Load) { |
| 2706 | Builder.SetInsertPoint(ReleaseBB); |
| 2707 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2708 | llvm::Release); |
| 2709 | Builder.CreateBr(ContBB); |
| 2710 | SI->addCase(Builder.getInt32(3), ReleaseBB); |
| 2711 | } |
| 2712 | if (E->getOp() != AtomicExpr::Load && E->getOp() != AtomicExpr::Store) { |
| 2713 | Builder.SetInsertPoint(AcqRelBB); |
| 2714 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2715 | llvm::AcquireRelease); |
| 2716 | Builder.CreateBr(ContBB); |
| 2717 | SI->addCase(Builder.getInt32(4), AcqRelBB); |
| 2718 | } |
| 2719 | Builder.SetInsertPoint(SeqCstBB); |
| 2720 | EmitAtomicOp(*this, E, Dest, Ptr, Val1, Val2, Size, Align, |
| 2721 | llvm::SequentiallyConsistent); |
| 2722 | Builder.CreateBr(ContBB); |
| 2723 | SI->addCase(Builder.getInt32(5), SeqCstBB); |
| 2724 | |
| 2725 | // Cleanup and return |
| 2726 | Builder.SetInsertPoint(ContBB); |
| 2727 | if (E->getOp() == AtomicExpr::Store) |
| 2728 | return RValue::get(0); |
| 2729 | return ConvertTempToRValue(*this, E->getType(), OrigDest); |
| 2730 | } |
Peter Collingbourne | c5096cb | 2011-10-27 19:19:51 +0000 | [diff] [blame] | 2731 | |
| 2732 | void CodeGenFunction::SetFPAccuracy(llvm::Value *Val, unsigned AccuracyN, |
| 2733 | unsigned AccuracyD) { |
| 2734 | assert(Val->getType()->isFPOrFPVectorTy()); |
| 2735 | if (!AccuracyN || !isa<llvm::Instruction>(Val)) |
| 2736 | return; |
| 2737 | |
| 2738 | llvm::Value *Vals[2]; |
| 2739 | Vals[0] = llvm::ConstantInt::get(Int32Ty, AccuracyN); |
| 2740 | Vals[1] = llvm::ConstantInt::get(Int32Ty, AccuracyD); |
| 2741 | llvm::MDNode *Node = llvm::MDNode::get(getLLVMContext(), Vals); |
| 2742 | |
| 2743 | cast<llvm::Instruction>(Val)->setMetadata(llvm::LLVMContext::MD_fpaccuracy, |
| 2744 | Node); |
| 2745 | } |
John McCall | 4b9c2d2 | 2011-11-06 09:01:30 +0000 | [diff] [blame] | 2746 | |
| 2747 | namespace { |
| 2748 | struct LValueOrRValue { |
| 2749 | LValue LV; |
| 2750 | RValue RV; |
| 2751 | }; |
| 2752 | } |
| 2753 | |
| 2754 | static LValueOrRValue emitPseudoObjectExpr(CodeGenFunction &CGF, |
| 2755 | const PseudoObjectExpr *E, |
| 2756 | bool forLValue, |
| 2757 | AggValueSlot slot) { |
| 2758 | llvm::SmallVector<CodeGenFunction::OpaqueValueMappingData, 4> opaques; |
| 2759 | |
| 2760 | // Find the result expression, if any. |
| 2761 | const Expr *resultExpr = E->getResultExpr(); |
| 2762 | LValueOrRValue result; |
| 2763 | |
| 2764 | for (PseudoObjectExpr::const_semantics_iterator |
| 2765 | i = E->semantics_begin(), e = E->semantics_end(); i != e; ++i) { |
| 2766 | const Expr *semantic = *i; |
| 2767 | |
| 2768 | // If this semantic expression is an opaque value, bind it |
| 2769 | // to the result of its source expression. |
| 2770 | if (const OpaqueValueExpr *ov = dyn_cast<OpaqueValueExpr>(semantic)) { |
| 2771 | |
| 2772 | // If this is the result expression, we may need to evaluate |
| 2773 | // directly into the slot. |
| 2774 | typedef CodeGenFunction::OpaqueValueMappingData OVMA; |
| 2775 | OVMA opaqueData; |
| 2776 | if (ov == resultExpr && ov->isRValue() && !forLValue && |
| 2777 | CodeGenFunction::hasAggregateLLVMType(ov->getType()) && |
| 2778 | !ov->getType()->isAnyComplexType()) { |
| 2779 | CGF.EmitAggExpr(ov->getSourceExpr(), slot); |
| 2780 | |
| 2781 | LValue LV = CGF.MakeAddrLValue(slot.getAddr(), ov->getType()); |
| 2782 | opaqueData = OVMA::bind(CGF, ov, LV); |
| 2783 | result.RV = slot.asRValue(); |
| 2784 | |
| 2785 | // Otherwise, emit as normal. |
| 2786 | } else { |
| 2787 | opaqueData = OVMA::bind(CGF, ov, ov->getSourceExpr()); |
| 2788 | |
| 2789 | // If this is the result, also evaluate the result now. |
| 2790 | if (ov == resultExpr) { |
| 2791 | if (forLValue) |
| 2792 | result.LV = CGF.EmitLValue(ov); |
| 2793 | else |
| 2794 | result.RV = CGF.EmitAnyExpr(ov, slot); |
| 2795 | } |
| 2796 | } |
| 2797 | |
| 2798 | opaques.push_back(opaqueData); |
| 2799 | |
| 2800 | // Otherwise, if the expression is the result, evaluate it |
| 2801 | // and remember the result. |
| 2802 | } else if (semantic == resultExpr) { |
| 2803 | if (forLValue) |
| 2804 | result.LV = CGF.EmitLValue(semantic); |
| 2805 | else |
| 2806 | result.RV = CGF.EmitAnyExpr(semantic, slot); |
| 2807 | |
| 2808 | // Otherwise, evaluate the expression in an ignored context. |
| 2809 | } else { |
| 2810 | CGF.EmitIgnoredExpr(semantic); |
| 2811 | } |
| 2812 | } |
| 2813 | |
| 2814 | // Unbind all the opaques now. |
| 2815 | for (unsigned i = 0, e = opaques.size(); i != e; ++i) |
| 2816 | opaques[i].unbind(CGF); |
| 2817 | |
| 2818 | return result; |
| 2819 | } |
| 2820 | |
| 2821 | RValue CodeGenFunction::EmitPseudoObjectRValue(const PseudoObjectExpr *E, |
| 2822 | AggValueSlot slot) { |
| 2823 | return emitPseudoObjectExpr(*this, E, false, slot).RV; |
| 2824 | } |
| 2825 | |
| 2826 | LValue CodeGenFunction::EmitPseudoObjectLValue(const PseudoObjectExpr *E) { |
| 2827 | return emitPseudoObjectExpr(*this, E, true, AggValueSlot::ignored()).LV; |
| 2828 | } |