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" |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 17 | #include "CGObjCRuntime.h" |
Daniel Dunbar | de7fb84 | 2008-08-11 05:00:27 +0000 | [diff] [blame] | 18 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 19 | #include "clang/AST/DeclObjC.h" |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 20 | #include "llvm/Target/TargetData.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 21 | using namespace clang; |
| 22 | using namespace CodeGen; |
| 23 | |
| 24 | //===--------------------------------------------------------------------===// |
| 25 | // Miscellaneous Helper Methods |
| 26 | //===--------------------------------------------------------------------===// |
| 27 | |
| 28 | /// CreateTempAlloca - This creates a alloca and inserts it into the entry |
| 29 | /// block. |
| 30 | llvm::AllocaInst *CodeGenFunction::CreateTempAlloca(const llvm::Type *Ty, |
| 31 | const char *Name) { |
Chris Lattner | f146684 | 2009-03-22 00:24:14 +0000 | [diff] [blame] | 32 | if (!Builder.isNamePreserving()) |
| 33 | Name = ""; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 34 | return new llvm::AllocaInst(Ty, 0, Name, AllocaInsertPt); |
| 35 | } |
| 36 | |
| 37 | /// EvaluateExprAsBool - Perform the usual unary conversions on the specified |
| 38 | /// expression and compare the result against zero, returning an Int1Ty value. |
| 39 | llvm::Value *CodeGenFunction::EvaluateExprAsBool(const Expr *E) { |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 40 | QualType BoolTy = getContext().BoolTy; |
Chris Lattner | 9b2dc28 | 2008-04-04 16:54:41 +0000 | [diff] [blame] | 41 | if (!E->getType()->isAnyComplexType()) |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 42 | return EmitScalarConversion(EmitScalarExpr(E), E->getType(), BoolTy); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 43 | |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 44 | return EmitComplexToScalarConversion(EmitComplexExpr(E), E->getType(),BoolTy); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 45 | } |
| 46 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 47 | /// EmitAnyExpr - Emit code to compute the specified expression which can have |
| 48 | /// any type. The result is returned as an RValue struct. If this is an |
| 49 | /// aggregate expression, the aggloc/agglocvolatile arguments indicate where |
| 50 | /// the result should be returned. |
| 51 | RValue CodeGenFunction::EmitAnyExpr(const Expr *E, llvm::Value *AggLoc, |
| 52 | bool isAggLocVolatile) { |
| 53 | if (!hasAggregateLLVMType(E->getType())) |
| 54 | return RValue::get(EmitScalarExpr(E)); |
Chris Lattner | 9b2dc28 | 2008-04-04 16:54:41 +0000 | [diff] [blame] | 55 | else if (E->getType()->isAnyComplexType()) |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 56 | return RValue::getComplex(EmitComplexExpr(E)); |
| 57 | |
| 58 | EmitAggExpr(E, AggLoc, isAggLocVolatile); |
| 59 | return RValue::getAggregate(AggLoc); |
| 60 | } |
| 61 | |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 62 | /// EmitAnyExprToTemp - Similary to EmitAnyExpr(), however, the result |
| 63 | /// will always be accessible even if no aggregate location is |
| 64 | /// provided. |
| 65 | RValue CodeGenFunction::EmitAnyExprToTemp(const Expr *E, llvm::Value *AggLoc, |
| 66 | bool isAggLocVolatile) { |
| 67 | if (!AggLoc && hasAggregateLLVMType(E->getType()) && |
| 68 | !E->getType()->isAnyComplexType()) |
| 69 | AggLoc = CreateTempAlloca(ConvertType(E->getType()), "agg.tmp"); |
| 70 | return EmitAnyExpr(E, AggLoc, isAggLocVolatile); |
| 71 | } |
| 72 | |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 73 | /// getAccessedFieldNo - Given an encoded value and a result number, return |
| 74 | /// the input field number being accessed. |
| 75 | unsigned CodeGenFunction::getAccessedFieldNo(unsigned Idx, |
| 76 | const llvm::Constant *Elts) { |
| 77 | if (isa<llvm::ConstantAggregateZero>(Elts)) |
| 78 | return 0; |
| 79 | |
| 80 | return cast<llvm::ConstantInt>(Elts->getOperand(Idx))->getZExtValue(); |
| 81 | } |
| 82 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 83 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 84 | //===----------------------------------------------------------------------===// |
| 85 | // LValue Expression Emission |
| 86 | //===----------------------------------------------------------------------===// |
| 87 | |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 88 | RValue CodeGenFunction::GetUndefRValue(QualType Ty) { |
| 89 | if (Ty->isVoidType()) { |
| 90 | return RValue::get(0); |
| 91 | } else if (const ComplexType *CTy = Ty->getAsComplexType()) { |
Daniel Dunbar | 8fa73ed | 2009-01-09 20:09:28 +0000 | [diff] [blame] | 92 | const llvm::Type *EltTy = ConvertType(CTy->getElementType()); |
| 93 | llvm::Value *U = llvm::UndefValue::get(EltTy); |
| 94 | return RValue::getComplex(std::make_pair(U, U)); |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 95 | } else if (hasAggregateLLVMType(Ty)) { |
| 96 | const llvm::Type *LTy = llvm::PointerType::getUnqual(ConvertType(Ty)); |
| 97 | return RValue::getAggregate(llvm::UndefValue::get(LTy)); |
Daniel Dunbar | 8fa73ed | 2009-01-09 20:09:28 +0000 | [diff] [blame] | 98 | } else { |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 99 | return RValue::get(llvm::UndefValue::get(ConvertType(Ty))); |
Daniel Dunbar | 8fa73ed | 2009-01-09 20:09:28 +0000 | [diff] [blame] | 100 | } |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 101 | } |
| 102 | |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 103 | RValue CodeGenFunction::EmitUnsupportedRValue(const Expr *E, |
| 104 | const char *Name) { |
| 105 | ErrorUnsupported(E, Name); |
| 106 | return GetUndefRValue(E->getType()); |
| 107 | } |
| 108 | |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 109 | LValue CodeGenFunction::EmitUnsupportedLValue(const Expr *E, |
| 110 | const char *Name) { |
| 111 | ErrorUnsupported(E, Name); |
| 112 | llvm::Type *Ty = llvm::PointerType::getUnqual(ConvertType(E->getType())); |
| 113 | return LValue::MakeAddr(llvm::UndefValue::get(Ty), |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 114 | E->getType().getCVRQualifiers(), |
| 115 | getContext().getObjCGCAttrKind(E->getType())); |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 116 | } |
| 117 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 118 | /// EmitLValue - Emit code to compute a designator that specifies the location |
| 119 | /// of the expression. |
| 120 | /// |
| 121 | /// This can return one of two things: a simple address or a bitfield |
| 122 | /// reference. In either case, the LLVM Value* in the LValue structure is |
| 123 | /// guaranteed to be an LLVM pointer type. |
| 124 | /// |
| 125 | /// If this returns a bitfield reference, nothing about the pointee type of |
| 126 | /// the LLVM value is known: For example, it may not be a pointer to an |
| 127 | /// integer. |
| 128 | /// |
| 129 | /// If this returns a normal address, and if the lvalue's C type is fixed |
| 130 | /// size, this method guarantees that the returned pointer type will point to |
| 131 | /// an LLVM type of the same size of the lvalue's type. If the lvalue has a |
| 132 | /// variable length type, this is not possible. |
| 133 | /// |
| 134 | LValue CodeGenFunction::EmitLValue(const Expr *E) { |
| 135 | switch (E->getStmtClass()) { |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 136 | default: return EmitUnsupportedLValue(E, "l-value expression"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 137 | |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 138 | case Expr::BinaryOperatorClass: |
| 139 | return EmitBinaryOperatorLValue(cast<BinaryOperator>(E)); |
Douglas Gregor | b460980 | 2008-11-14 16:09:21 +0000 | [diff] [blame] | 140 | case Expr::CallExprClass: |
| 141 | case Expr::CXXOperatorCallExprClass: |
| 142 | return EmitCallExprLValue(cast<CallExpr>(E)); |
Daniel Dunbar | 5b5c9ef | 2009-02-11 20:59:32 +0000 | [diff] [blame] | 143 | case Expr::VAArgExprClass: |
| 144 | return EmitVAArgExprLValue(cast<VAArgExpr>(E)); |
Douglas Gregor | 1a49af9 | 2009-01-06 05:10:23 +0000 | [diff] [blame] | 145 | case Expr::DeclRefExprClass: |
| 146 | case Expr::QualifiedDeclRefExprClass: |
| 147 | return EmitDeclRefLValue(cast<DeclRefExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 148 | case Expr::ParenExprClass:return EmitLValue(cast<ParenExpr>(E)->getSubExpr()); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 149 | case Expr::PredefinedExprClass: |
| 150 | return EmitPredefinedLValue(cast<PredefinedExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 151 | case Expr::StringLiteralClass: |
| 152 | return EmitStringLiteralLValue(cast<StringLiteral>(E)); |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 153 | case Expr::ObjCEncodeExprClass: |
| 154 | return EmitObjCEncodeExprLValue(cast<ObjCEncodeExpr>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 155 | |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 156 | case Expr::BlockDeclRefExprClass: |
| 157 | return EmitBlockDeclRefLValue(cast<BlockDeclRefExpr>(E)); |
| 158 | |
Argyrios Kyrtzidis | e3a09e6 | 2008-09-10 02:36:38 +0000 | [diff] [blame] | 159 | case Expr::CXXConditionDeclExprClass: |
| 160 | return EmitCXXConditionDeclLValue(cast<CXXConditionDeclExpr>(E)); |
| 161 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 162 | case Expr::ObjCMessageExprClass: |
| 163 | return EmitObjCMessageExprLValue(cast<ObjCMessageExpr>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 164 | case Expr::ObjCIvarRefExprClass: |
| 165 | return EmitObjCIvarRefLValue(cast<ObjCIvarRefExpr>(E)); |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 166 | case Expr::ObjCPropertyRefExprClass: |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 167 | return EmitObjCPropertyRefLValue(cast<ObjCPropertyRefExpr>(E)); |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 168 | case Expr::ObjCKVCRefExprClass: |
| 169 | return EmitObjCKVCRefLValue(cast<ObjCKVCRefExpr>(E)); |
Douglas Gregor | cd9b46e | 2008-11-04 14:56:14 +0000 | [diff] [blame] | 170 | case Expr::ObjCSuperExprClass: |
| 171 | return EmitObjCSuperExpr(cast<ObjCSuperExpr>(E)); |
| 172 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 173 | case Expr::UnaryOperatorClass: |
| 174 | return EmitUnaryOpLValue(cast<UnaryOperator>(E)); |
| 175 | case Expr::ArraySubscriptExprClass: |
| 176 | return EmitArraySubscriptExpr(cast<ArraySubscriptExpr>(E)); |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 177 | case Expr::ExtVectorElementExprClass: |
| 178 | return EmitExtVectorElementExpr(cast<ExtVectorElementExpr>(E)); |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 179 | case Expr::MemberExprClass: return EmitMemberExpr(cast<MemberExpr>(E)); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 180 | case Expr::CompoundLiteralExprClass: |
| 181 | return EmitCompoundLiteralLValue(cast<CompoundLiteralExpr>(E)); |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 182 | case Expr::ConditionalOperatorClass: |
| 183 | return EmitConditionalOperator(cast<ConditionalOperator>(E)); |
Chris Lattner | 670a62c | 2008-12-12 05:35:08 +0000 | [diff] [blame] | 184 | case Expr::ChooseExprClass: |
Eli Friedman | 7976932 | 2009-03-04 05:52:32 +0000 | [diff] [blame] | 185 | return EmitLValue(cast<ChooseExpr>(E)->getChosenSubExpr(getContext())); |
Chris Lattner | c3953a6 | 2009-03-18 04:02:57 +0000 | [diff] [blame] | 186 | case Expr::ImplicitCastExprClass: |
| 187 | case Expr::CStyleCastExprClass: |
| 188 | case Expr::CXXFunctionalCastExprClass: |
| 189 | case Expr::CXXStaticCastExprClass: |
| 190 | case Expr::CXXDynamicCastExprClass: |
| 191 | case Expr::CXXReinterpretCastExprClass: |
| 192 | case Expr::CXXConstCastExprClass: |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 193 | return EmitCastLValue(cast<CastExpr>(E)); |
Anders Carlsson | b14095a | 2009-04-17 00:06:03 +0000 | [diff] [blame] | 194 | case Expr::CXXTemporaryObjectExprClass: |
| 195 | return EmitCXXTemporaryObjectExprLValue(cast<CXXTemporaryObjectExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 196 | } |
| 197 | } |
| 198 | |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 199 | llvm::Value *CodeGenFunction::EmitLoadOfScalar(llvm::Value *Addr, bool Volatile, |
| 200 | QualType Ty) { |
| 201 | llvm::Value *V = Builder.CreateLoad(Addr, Volatile, "tmp"); |
| 202 | |
| 203 | // Bool can have different representation in memory than in |
| 204 | // registers. |
| 205 | if (Ty->isBooleanType()) |
| 206 | if (V->getType() != llvm::Type::Int1Ty) |
| 207 | V = Builder.CreateTrunc(V, llvm::Type::Int1Ty, "tobool"); |
| 208 | |
| 209 | return V; |
| 210 | } |
| 211 | |
| 212 | void CodeGenFunction::EmitStoreOfScalar(llvm::Value *Value, llvm::Value *Addr, |
| 213 | bool Volatile) { |
| 214 | // Handle stores of types which have different representations in |
| 215 | // memory and as LLVM values. |
| 216 | |
| 217 | // FIXME: We shouldn't be this loose, we should only do this |
| 218 | // conversion when we have a type we know has a different memory |
| 219 | // representation (e.g., bool). |
| 220 | |
| 221 | const llvm::Type *SrcTy = Value->getType(); |
| 222 | const llvm::PointerType *DstPtr = cast<llvm::PointerType>(Addr->getType()); |
| 223 | if (DstPtr->getElementType() != SrcTy) { |
| 224 | const llvm::Type *MemTy = |
| 225 | llvm::PointerType::get(SrcTy, DstPtr->getAddressSpace()); |
| 226 | Addr = Builder.CreateBitCast(Addr, MemTy, "storetmp"); |
| 227 | } |
| 228 | |
| 229 | Builder.CreateStore(Value, Addr, Volatile); |
| 230 | } |
| 231 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 232 | /// EmitLoadOfLValue - Given an expression that represents a value lvalue, |
| 233 | /// this method emits the address of the lvalue, then loads the result as an |
| 234 | /// rvalue, returning the rvalue. |
| 235 | RValue CodeGenFunction::EmitLoadOfLValue(LValue LV, QualType ExprType) { |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 236 | if (LV.isObjCWeak()) { |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 237 | // load of a __weak object. |
| 238 | llvm::Value *AddrWeakObj = LV.getAddress(); |
Fariborz Jahanian | 3e283e3 | 2008-11-18 22:37:34 +0000 | [diff] [blame] | 239 | llvm::Value *read_weak = CGM.getObjCRuntime().EmitObjCWeakRead(*this, |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 240 | AddrWeakObj); |
| 241 | return RValue::get(read_weak); |
| 242 | } |
| 243 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 244 | if (LV.isSimple()) { |
| 245 | llvm::Value *Ptr = LV.getAddress(); |
| 246 | const llvm::Type *EltTy = |
| 247 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
| 248 | |
| 249 | // Simple scalar l-value. |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 250 | if (EltTy->isSingleValueType()) |
| 251 | return RValue::get(EmitLoadOfScalar(Ptr, LV.isVolatileQualified(), |
| 252 | ExprType)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 253 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 254 | assert(ExprType->isFunctionType() && "Unknown scalar value"); |
| 255 | return RValue::get(Ptr); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | if (LV.isVectorElt()) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 259 | llvm::Value *Vec = Builder.CreateLoad(LV.getVectorAddr(), |
| 260 | LV.isVolatileQualified(), "tmp"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 261 | return RValue::get(Builder.CreateExtractElement(Vec, LV.getVectorIdx(), |
| 262 | "vecext")); |
| 263 | } |
Chris Lattner | 46ea8eb | 2007-08-03 00:16:29 +0000 | [diff] [blame] | 264 | |
| 265 | // If this is a reference to a subset of the elements of a vector, either |
| 266 | // shuffle the input or extract/insert them as appropriate. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 267 | if (LV.isExtVectorElt()) |
| 268 | return EmitLoadOfExtVectorElementLValue(LV, ExprType); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 269 | |
| 270 | if (LV.isBitfield()) |
| 271 | return EmitLoadOfBitfieldLValue(LV, ExprType); |
| 272 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 273 | if (LV.isPropertyRef()) |
| 274 | return EmitLoadOfPropertyRefLValue(LV, ExprType); |
| 275 | |
Chris Lattner | 73525de | 2009-02-16 21:11:58 +0000 | [diff] [blame] | 276 | assert(LV.isKVCRef() && "Unknown LValue type!"); |
| 277 | return EmitLoadOfKVCRefLValue(LV, ExprType); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 278 | } |
| 279 | |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 280 | RValue CodeGenFunction::EmitLoadOfBitfieldLValue(LValue LV, |
| 281 | QualType ExprType) { |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 282 | unsigned StartBit = LV.getBitfieldStartBit(); |
| 283 | unsigned BitfieldSize = LV.getBitfieldSize(); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 284 | llvm::Value *Ptr = LV.getBitfieldAddr(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 285 | |
| 286 | const llvm::Type *EltTy = |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 287 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 288 | unsigned EltTySize = CGM.getTargetData().getTypeSizeInBits(EltTy); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 289 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 290 | // In some cases the bitfield may straddle two memory locations. |
| 291 | // Currently we load the entire bitfield, then do the magic to |
| 292 | // sign-extend it if necessary. This results in somewhat more code |
| 293 | // than necessary for the common case (one load), since two shifts |
| 294 | // accomplish both the masking and sign extension. |
| 295 | unsigned LowBits = std::min(BitfieldSize, EltTySize - StartBit); |
| 296 | llvm::Value *Val = Builder.CreateLoad(Ptr, LV.isVolatileQualified(), "tmp"); |
| 297 | |
| 298 | // Shift to proper location. |
Daniel Dunbar | f3edc2f | 2008-11-13 02:20:34 +0000 | [diff] [blame] | 299 | if (StartBit) |
| 300 | Val = Builder.CreateLShr(Val, llvm::ConstantInt::get(EltTy, StartBit), |
| 301 | "bf.lo"); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 302 | |
| 303 | // Mask off unused bits. |
| 304 | llvm::Constant *LowMask = |
| 305 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, LowBits)); |
| 306 | Val = Builder.CreateAnd(Val, LowMask, "bf.lo.cleared"); |
| 307 | |
| 308 | // Fetch the high bits if necessary. |
| 309 | if (LowBits < BitfieldSize) { |
| 310 | unsigned HighBits = BitfieldSize - LowBits; |
| 311 | llvm::Value *HighPtr = |
| 312 | Builder.CreateGEP(Ptr, llvm::ConstantInt::get(llvm::Type::Int32Ty, 1), |
| 313 | "bf.ptr.hi"); |
| 314 | llvm::Value *HighVal = Builder.CreateLoad(HighPtr, |
| 315 | LV.isVolatileQualified(), |
| 316 | "tmp"); |
| 317 | |
| 318 | // Mask off unused bits. |
| 319 | llvm::Constant *HighMask = |
| 320 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, HighBits)); |
| 321 | HighVal = Builder.CreateAnd(HighVal, HighMask, "bf.lo.cleared"); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 322 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 323 | // Shift to proper location and or in to bitfield value. |
| 324 | HighVal = Builder.CreateShl(HighVal, |
| 325 | llvm::ConstantInt::get(EltTy, LowBits)); |
| 326 | Val = Builder.CreateOr(Val, HighVal, "bf.val"); |
| 327 | } |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 328 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 329 | // Sign extend if necessary. |
| 330 | if (LV.isBitfieldSigned()) { |
| 331 | llvm::Value *ExtraBits = llvm::ConstantInt::get(EltTy, |
| 332 | EltTySize - BitfieldSize); |
| 333 | Val = Builder.CreateAShr(Builder.CreateShl(Val, ExtraBits), |
| 334 | ExtraBits, "bf.val.sext"); |
| 335 | } |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 336 | |
| 337 | // The bitfield type and the normal type differ when the storage sizes |
| 338 | // differ (currently just _Bool). |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 339 | Val = Builder.CreateIntCast(Val, ConvertType(ExprType), false, "tmp"); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 340 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 341 | return RValue::get(Val); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 342 | } |
| 343 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 344 | RValue CodeGenFunction::EmitLoadOfPropertyRefLValue(LValue LV, |
| 345 | QualType ExprType) { |
| 346 | return EmitObjCPropertyGet(LV.getPropertyRefExpr()); |
| 347 | } |
| 348 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 349 | RValue CodeGenFunction::EmitLoadOfKVCRefLValue(LValue LV, |
| 350 | QualType ExprType) { |
| 351 | return EmitObjCPropertyGet(LV.getKVCRefExpr()); |
| 352 | } |
| 353 | |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 354 | // If this is a reference to a subset of the elements of a vector, create an |
| 355 | // appropriate shufflevector. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 356 | RValue CodeGenFunction::EmitLoadOfExtVectorElementLValue(LValue LV, |
| 357 | QualType ExprType) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 358 | llvm::Value *Vec = Builder.CreateLoad(LV.getExtVectorAddr(), |
| 359 | LV.isVolatileQualified(), "tmp"); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 360 | |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 361 | const llvm::Constant *Elts = LV.getExtVectorElts(); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 362 | |
| 363 | // If the result of the expression is a non-vector type, we must be |
| 364 | // extracting a single element. Just codegen as an extractelement. |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 365 | const VectorType *ExprVT = ExprType->getAsVectorType(); |
| 366 | if (!ExprVT) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 367 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 368 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx); |
| 369 | return RValue::get(Builder.CreateExtractElement(Vec, Elt, "tmp")); |
| 370 | } |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 371 | |
| 372 | // Always use shuffle vector to try to retain the original program structure |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 373 | unsigned NumResultElts = ExprVT->getNumElements(); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 374 | |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 375 | llvm::SmallVector<llvm::Constant*, 4> Mask; |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 376 | for (unsigned i = 0; i != NumResultElts; ++i) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 377 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 378 | Mask.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx)); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 379 | } |
| 380 | |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 381 | llvm::Value *MaskV = llvm::ConstantVector::get(&Mask[0], Mask.size()); |
| 382 | Vec = Builder.CreateShuffleVector(Vec, |
| 383 | llvm::UndefValue::get(Vec->getType()), |
| 384 | MaskV, "tmp"); |
| 385 | return RValue::get(Vec); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 389 | |
| 390 | /// EmitStoreThroughLValue - Store the specified rvalue into the specified |
| 391 | /// lvalue, where both are guaranteed to the have the same type, and that type |
| 392 | /// is 'Ty'. |
| 393 | void CodeGenFunction::EmitStoreThroughLValue(RValue Src, LValue Dst, |
| 394 | QualType Ty) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 395 | if (!Dst.isSimple()) { |
| 396 | if (Dst.isVectorElt()) { |
| 397 | // Read/modify/write the vector, inserting the new element. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 398 | llvm::Value *Vec = Builder.CreateLoad(Dst.getVectorAddr(), |
| 399 | Dst.isVolatileQualified(), "tmp"); |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 400 | Vec = Builder.CreateInsertElement(Vec, Src.getScalarVal(), |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 401 | Dst.getVectorIdx(), "vecins"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 402 | Builder.CreateStore(Vec, Dst.getVectorAddr(),Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 403 | return; |
| 404 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 405 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 406 | // If this is an update of extended vector elements, insert them as |
| 407 | // appropriate. |
| 408 | if (Dst.isExtVectorElt()) |
| 409 | return EmitStoreThroughExtVectorComponentLValue(Src, Dst, Ty); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 410 | |
| 411 | if (Dst.isBitfield()) |
| 412 | return EmitStoreThroughBitfieldLValue(Src, Dst, Ty); |
| 413 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 414 | if (Dst.isPropertyRef()) |
| 415 | return EmitStoreThroughPropertyRefLValue(Src, Dst, Ty); |
| 416 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 417 | if (Dst.isKVCRef()) |
| 418 | return EmitStoreThroughKVCRefLValue(Src, Dst, Ty); |
| 419 | |
Lauro Ramos Venancio | 6553982 | 2008-01-22 22:38:35 +0000 | [diff] [blame] | 420 | assert(0 && "Unknown LValue type"); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 421 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 422 | |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 423 | if (Dst.isObjCWeak() && !Dst.isNonGC()) { |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 424 | // load of a __weak object. |
| 425 | llvm::Value *LvalueDst = Dst.getAddress(); |
| 426 | llvm::Value *src = Src.getScalarVal(); |
Mike Stump | f33651c | 2009-04-14 00:57:29 +0000 | [diff] [blame] | 427 | CGM.getObjCRuntime().EmitObjCWeakAssign(*this, src, LvalueDst); |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 428 | return; |
| 429 | } |
| 430 | |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 431 | if (Dst.isObjCStrong() && !Dst.isNonGC()) { |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 432 | // load of a __strong object. |
| 433 | llvm::Value *LvalueDst = Dst.getAddress(); |
| 434 | llvm::Value *src = Src.getScalarVal(); |
Fariborz Jahanian | 167fdc1 | 2009-02-19 18:29:24 +0000 | [diff] [blame] | 435 | #if 0 |
| 436 | // FIXME. We cannot positively determine if we have an |
| 437 | // 'ivar' assignment, object assignment or an unknown |
| 438 | // assignment. For now, generate call to objc_assign_strongCast |
| 439 | // assignment which is a safe, but consevative assumption. |
Fariborz Jahanian | d1cc804 | 2008-11-20 20:53:20 +0000 | [diff] [blame] | 440 | if (Dst.isObjCIvar()) |
| 441 | CGM.getObjCRuntime().EmitObjCIvarAssign(*this, src, LvalueDst); |
| 442 | else |
| 443 | CGM.getObjCRuntime().EmitObjCGlobalAssign(*this, src, LvalueDst); |
Fariborz Jahanian | 167fdc1 | 2009-02-19 18:29:24 +0000 | [diff] [blame] | 444 | #endif |
| 445 | CGM.getObjCRuntime().EmitObjCStrongCastAssign(*this, src, LvalueDst); |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 446 | return; |
| 447 | } |
| 448 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 449 | assert(Src.isScalar() && "Can't emit an agg store with this method"); |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 450 | EmitStoreOfScalar(Src.getScalarVal(), Dst.getAddress(), |
| 451 | Dst.isVolatileQualified()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 452 | } |
| 453 | |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 454 | void CodeGenFunction::EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 455 | QualType Ty, |
| 456 | llvm::Value **Result) { |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 457 | unsigned StartBit = Dst.getBitfieldStartBit(); |
| 458 | unsigned BitfieldSize = Dst.getBitfieldSize(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 459 | llvm::Value *Ptr = Dst.getBitfieldAddr(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 460 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 461 | const llvm::Type *EltTy = |
| 462 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
| 463 | unsigned EltTySize = CGM.getTargetData().getTypeSizeInBits(EltTy); |
| 464 | |
| 465 | // Get the new value, cast to the appropriate type and masked to |
| 466 | // exactly the size of the bit-field. |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 467 | llvm::Value *SrcVal = Src.getScalarVal(); |
| 468 | llvm::Value *NewVal = Builder.CreateIntCast(SrcVal, EltTy, false, "tmp"); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 469 | llvm::Constant *Mask = |
| 470 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, BitfieldSize)); |
| 471 | NewVal = Builder.CreateAnd(NewVal, Mask, "bf.value"); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 472 | |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 473 | // Return the new value of the bit-field, if requested. |
| 474 | if (Result) { |
| 475 | // Cast back to the proper type for result. |
| 476 | const llvm::Type *SrcTy = SrcVal->getType(); |
| 477 | llvm::Value *SrcTrunc = Builder.CreateIntCast(NewVal, SrcTy, false, |
| 478 | "bf.reload.val"); |
| 479 | |
| 480 | // Sign extend if necessary. |
| 481 | if (Dst.isBitfieldSigned()) { |
| 482 | unsigned SrcTySize = CGM.getTargetData().getTypeSizeInBits(SrcTy); |
| 483 | llvm::Value *ExtraBits = llvm::ConstantInt::get(SrcTy, |
| 484 | SrcTySize - BitfieldSize); |
| 485 | SrcTrunc = Builder.CreateAShr(Builder.CreateShl(SrcTrunc, ExtraBits), |
| 486 | ExtraBits, "bf.reload.sext"); |
| 487 | } |
| 488 | |
| 489 | *Result = SrcTrunc; |
| 490 | } |
| 491 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 492 | // In some cases the bitfield may straddle two memory locations. |
| 493 | // Emit the low part first and check to see if the high needs to be |
| 494 | // done. |
| 495 | unsigned LowBits = std::min(BitfieldSize, EltTySize - StartBit); |
| 496 | llvm::Value *LowVal = Builder.CreateLoad(Ptr, Dst.isVolatileQualified(), |
| 497 | "bf.prev.low"); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 498 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 499 | // Compute the mask for zero-ing the low part of this bitfield. |
| 500 | llvm::Constant *InvMask = |
| 501 | llvm::ConstantInt::get(~llvm::APInt::getBitsSet(EltTySize, StartBit, |
| 502 | StartBit + LowBits)); |
| 503 | |
| 504 | // Compute the new low part as |
| 505 | // LowVal = (LowVal & InvMask) | (NewVal << StartBit), |
| 506 | // with the shift of NewVal implicitly stripping the high bits. |
| 507 | llvm::Value *NewLowVal = |
| 508 | Builder.CreateShl(NewVal, llvm::ConstantInt::get(EltTy, StartBit), |
| 509 | "bf.value.lo"); |
| 510 | LowVal = Builder.CreateAnd(LowVal, InvMask, "bf.prev.lo.cleared"); |
| 511 | LowVal = Builder.CreateOr(LowVal, NewLowVal, "bf.new.lo"); |
| 512 | |
| 513 | // Write back. |
| 514 | Builder.CreateStore(LowVal, Ptr, Dst.isVolatileQualified()); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 515 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 516 | // If the low part doesn't cover the bitfield emit a high part. |
| 517 | if (LowBits < BitfieldSize) { |
| 518 | unsigned HighBits = BitfieldSize - LowBits; |
| 519 | llvm::Value *HighPtr = |
| 520 | Builder.CreateGEP(Ptr, llvm::ConstantInt::get(llvm::Type::Int32Ty, 1), |
| 521 | "bf.ptr.hi"); |
| 522 | llvm::Value *HighVal = Builder.CreateLoad(HighPtr, |
| 523 | Dst.isVolatileQualified(), |
| 524 | "bf.prev.hi"); |
| 525 | |
| 526 | // Compute the mask for zero-ing the high part of this bitfield. |
| 527 | llvm::Constant *InvMask = |
| 528 | llvm::ConstantInt::get(~llvm::APInt::getLowBitsSet(EltTySize, HighBits)); |
| 529 | |
| 530 | // Compute the new high part as |
| 531 | // HighVal = (HighVal & InvMask) | (NewVal lshr LowBits), |
| 532 | // where the high bits of NewVal have already been cleared and the |
| 533 | // shift stripping the low bits. |
| 534 | llvm::Value *NewHighVal = |
| 535 | Builder.CreateLShr(NewVal, llvm::ConstantInt::get(EltTy, LowBits), |
| 536 | "bf.value.high"); |
| 537 | HighVal = Builder.CreateAnd(HighVal, InvMask, "bf.prev.hi.cleared"); |
| 538 | HighVal = Builder.CreateOr(HighVal, NewHighVal, "bf.new.hi"); |
| 539 | |
| 540 | // Write back. |
| 541 | Builder.CreateStore(HighVal, HighPtr, Dst.isVolatileQualified()); |
| 542 | } |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 543 | } |
| 544 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 545 | void CodeGenFunction::EmitStoreThroughPropertyRefLValue(RValue Src, |
| 546 | LValue Dst, |
| 547 | QualType Ty) { |
| 548 | EmitObjCPropertySet(Dst.getPropertyRefExpr(), Src); |
| 549 | } |
| 550 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 551 | void CodeGenFunction::EmitStoreThroughKVCRefLValue(RValue Src, |
| 552 | LValue Dst, |
| 553 | QualType Ty) { |
| 554 | EmitObjCPropertySet(Dst.getKVCRefExpr(), Src); |
| 555 | } |
| 556 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 557 | void CodeGenFunction::EmitStoreThroughExtVectorComponentLValue(RValue Src, |
| 558 | LValue Dst, |
| 559 | QualType Ty) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 560 | // This access turns into a read/modify/write of the vector. Load the input |
| 561 | // value now. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 562 | llvm::Value *Vec = Builder.CreateLoad(Dst.getExtVectorAddr(), |
| 563 | Dst.isVolatileQualified(), "tmp"); |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 564 | const llvm::Constant *Elts = Dst.getExtVectorElts(); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 565 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 566 | llvm::Value *SrcVal = Src.getScalarVal(); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 567 | |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 568 | if (const VectorType *VTy = Ty->getAsVectorType()) { |
| 569 | unsigned NumSrcElts = VTy->getNumElements(); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 570 | unsigned NumDstElts = |
| 571 | cast<llvm::VectorType>(Vec->getType())->getNumElements(); |
| 572 | if (NumDstElts == NumSrcElts) { |
| 573 | // Use shuffle vector is the src and destination are the same number |
| 574 | // of elements |
| 575 | llvm::SmallVector<llvm::Constant*, 4> Mask; |
| 576 | for (unsigned i = 0; i != NumSrcElts; ++i) { |
| 577 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
| 578 | Mask.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx)); |
| 579 | } |
| 580 | |
| 581 | llvm::Value *MaskV = llvm::ConstantVector::get(&Mask[0], Mask.size()); |
| 582 | Vec = Builder.CreateShuffleVector(SrcVal, |
| 583 | llvm::UndefValue::get(Vec->getType()), |
| 584 | MaskV, "tmp"); |
| 585 | } |
| 586 | else if (NumDstElts > NumSrcElts) { |
| 587 | // Extended the source vector to the same length and then shuffle it |
| 588 | // into the destination. |
| 589 | // FIXME: since we're shuffling with undef, can we just use the indices |
| 590 | // into that? This could be simpler. |
| 591 | llvm::SmallVector<llvm::Constant*, 4> ExtMask; |
| 592 | unsigned i; |
| 593 | for (i = 0; i != NumSrcElts; ++i) |
| 594 | ExtMask.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, i)); |
| 595 | for (; i != NumDstElts; ++i) |
| 596 | ExtMask.push_back(llvm::UndefValue::get(llvm::Type::Int32Ty)); |
| 597 | llvm::Value *ExtMaskV = llvm::ConstantVector::get(&ExtMask[0], |
| 598 | ExtMask.size()); |
Daniel Dunbar | bb76773 | 2009-02-17 18:31:04 +0000 | [diff] [blame] | 599 | llvm::Value *ExtSrcVal = |
| 600 | Builder.CreateShuffleVector(SrcVal, |
| 601 | llvm::UndefValue::get(SrcVal->getType()), |
| 602 | ExtMaskV, "tmp"); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 603 | // build identity |
| 604 | llvm::SmallVector<llvm::Constant*, 4> Mask; |
| 605 | for (unsigned i = 0; i != NumDstElts; ++i) { |
| 606 | Mask.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, i)); |
| 607 | } |
| 608 | // modify when what gets shuffled in |
| 609 | for (unsigned i = 0; i != NumSrcElts; ++i) { |
| 610 | unsigned Idx = getAccessedFieldNo(i, Elts); |
| 611 | Mask[Idx] =llvm::ConstantInt::get(llvm::Type::Int32Ty, i+NumDstElts); |
| 612 | } |
| 613 | llvm::Value *MaskV = llvm::ConstantVector::get(&Mask[0], Mask.size()); |
| 614 | Vec = Builder.CreateShuffleVector(Vec, ExtSrcVal, MaskV, "tmp"); |
| 615 | } |
| 616 | else { |
| 617 | // We should never shorten the vector |
| 618 | assert(0 && "unexpected shorten vector length"); |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 619 | } |
| 620 | } else { |
| 621 | // 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] | 622 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 623 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx); |
| 624 | Vec = Builder.CreateInsertElement(Vec, SrcVal, Elt, "tmp"); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 625 | } |
| 626 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 627 | Builder.CreateStore(Vec, Dst.getExtVectorAddr(), Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 628 | } |
| 629 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 630 | LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 631 | const VarDecl *VD = dyn_cast<VarDecl>(E->getDecl()); |
| 632 | |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 633 | if (VD && (VD->isBlockVarDecl() || isa<ParmVarDecl>(VD) || |
| 634 | isa<ImplicitParamDecl>(VD))) { |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 635 | LValue LV; |
Mike Stump | aa771a8 | 2009-04-14 18:24:37 +0000 | [diff] [blame] | 636 | bool GCable = VD->hasLocalStorage() && !VD->hasAttr<BlocksAttr>(); |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 637 | if (VD->hasExternalStorage()) { |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 638 | LV = LValue::MakeAddr(CGM.GetAddrOfGlobalVar(VD), |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 639 | E->getType().getCVRQualifiers(), |
| 640 | getContext().getObjCGCAttrKind(E->getType())); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 641 | } |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 642 | else { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 643 | llvm::Value *V = LocalDeclMap[VD]; |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 644 | assert(V && "DeclRefExpr not entered in LocalDeclMap?"); |
Fariborz Jahanian | 4f54526 | 2009-02-20 01:14:43 +0000 | [diff] [blame] | 645 | // local variables do not get their gc attribute set. |
| 646 | QualType::GCAttrTypes attr = QualType::GCNone; |
| 647 | // local static? |
Mike Stump | f33651c | 2009-04-14 00:57:29 +0000 | [diff] [blame] | 648 | if (!GCable) |
Fariborz Jahanian | 4f54526 | 2009-02-20 01:14:43 +0000 | [diff] [blame] | 649 | attr = getContext().getObjCGCAttrKind(E->getType()); |
Daniel Dunbar | b11fa0d | 2009-04-13 21:08:27 +0000 | [diff] [blame] | 650 | if (VD->hasAttr<BlocksAttr>()) { |
Mike Stump | dab514f | 2009-03-04 03:23:46 +0000 | [diff] [blame] | 651 | bool needsCopyDispose = BlockRequiresCopying(VD->getType()); |
| 652 | const llvm::Type *PtrStructTy = V->getType(); |
| 653 | const llvm::Type *Ty = PtrStructTy; |
| 654 | Ty = llvm::PointerType::get(Ty, 0); |
| 655 | V = Builder.CreateStructGEP(V, 1, "forwarding"); |
| 656 | V = Builder.CreateBitCast(V, Ty); |
| 657 | V = Builder.CreateLoad(V, false); |
| 658 | V = Builder.CreateBitCast(V, PtrStructTy); |
| 659 | V = Builder.CreateStructGEP(V, needsCopyDispose*2 + 4, "x"); |
| 660 | } |
Fariborz Jahanian | 4f54526 | 2009-02-20 01:14:43 +0000 | [diff] [blame] | 661 | LV = LValue::MakeAddr(V, E->getType().getCVRQualifiers(), attr); |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 662 | } |
Mike Stump | f33651c | 2009-04-14 00:57:29 +0000 | [diff] [blame] | 663 | LValue::SetObjCNonGC(LV, GCable); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 664 | return LV; |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 665 | } else if (VD && VD->isFileVarDecl()) { |
Fariborz Jahanian | 6d657c4 | 2008-11-18 20:18:11 +0000 | [diff] [blame] | 666 | LValue LV = LValue::MakeAddr(CGM.GetAddrOfGlobalVar(VD), |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 667 | E->getType().getCVRQualifiers(), |
| 668 | getContext().getObjCGCAttrKind(E->getType())); |
Fariborz Jahanian | 6d657c4 | 2008-11-18 20:18:11 +0000 | [diff] [blame] | 669 | return LV; |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 670 | } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(E->getDecl())) { |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 671 | return LValue::MakeAddr(CGM.GetAddrOfFunction(FD), |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 672 | E->getType().getCVRQualifiers(), |
| 673 | getContext().getObjCGCAttrKind(E->getType())); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 674 | } |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 675 | else if (const ImplicitParamDecl *IPD = |
| 676 | dyn_cast<ImplicitParamDecl>(E->getDecl())) { |
| 677 | llvm::Value *V = LocalDeclMap[IPD]; |
| 678 | assert(V && "BlockVarDecl not entered in LocalDeclMap?"); |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 679 | return LValue::MakeAddr(V, E->getType().getCVRQualifiers(), |
| 680 | getContext().getObjCGCAttrKind(E->getType())); |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 681 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 682 | assert(0 && "Unimp declref"); |
Chris Lattner | b1776cb | 2007-09-16 19:23:47 +0000 | [diff] [blame] | 683 | //an invalid LValue, but the assert will |
| 684 | //ensure that this point is never reached. |
| 685 | return LValue(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 686 | } |
| 687 | |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 688 | LValue CodeGenFunction::EmitBlockDeclRefLValue(const BlockDeclRefExpr *E) { |
| 689 | return LValue::MakeAddr(GetAddrOfBlockDecl(E), 0); |
| 690 | } |
| 691 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 692 | LValue CodeGenFunction::EmitUnaryOpLValue(const UnaryOperator *E) { |
| 693 | // __extension__ doesn't affect lvalue-ness. |
| 694 | if (E->getOpcode() == UnaryOperator::Extension) |
| 695 | return EmitLValue(E->getSubExpr()); |
| 696 | |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 697 | QualType ExprTy = getContext().getCanonicalType(E->getSubExpr()->getType()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 698 | switch (E->getOpcode()) { |
| 699 | default: assert(0 && "Unknown unary operator lvalue!"); |
| 700 | case UnaryOperator::Deref: |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 701 | { |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 702 | QualType T = |
| 703 | E->getSubExpr()->getType()->getAsPointerType()->getPointeeType(); |
Fariborz Jahanian | 207c521 | 2009-02-23 18:59:50 +0000 | [diff] [blame] | 704 | LValue LV = LValue::MakeAddr(EmitScalarExpr(E->getSubExpr()), |
| 705 | ExprTy->getAsPointerType()->getPointeeType() |
Fariborz Jahanian | 4f54526 | 2009-02-20 01:14:43 +0000 | [diff] [blame] | 706 | .getCVRQualifiers(), |
Fariborz Jahanian | 207c521 | 2009-02-23 18:59:50 +0000 | [diff] [blame] | 707 | getContext().getObjCGCAttrKind(T)); |
| 708 | // We should not generate __weak write barrier on indirect reference |
| 709 | // of a pointer to object; as in void foo (__weak id *param); *param = 0; |
| 710 | // But, we continue to generate __strong write barrier on indirect write |
| 711 | // into a pointer to object. |
| 712 | if (getContext().getLangOptions().ObjC1 && |
| 713 | getContext().getLangOptions().getGCMode() != LangOptions::NonGC && |
| 714 | LV.isObjCWeak()) |
| 715 | LValue::SetObjCNonGC(LV, !E->isOBJCGCCandidate()); |
| 716 | return LV; |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 717 | } |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 718 | case UnaryOperator::Real: |
| 719 | case UnaryOperator::Imag: |
| 720 | LValue LV = EmitLValue(E->getSubExpr()); |
Chris Lattner | 36b6a0a | 2008-03-19 05:19:41 +0000 | [diff] [blame] | 721 | unsigned Idx = E->getOpcode() == UnaryOperator::Imag; |
| 722 | return LValue::MakeAddr(Builder.CreateStructGEP(LV.getAddress(), |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 723 | Idx, "idx"), |
| 724 | ExprTy.getCVRQualifiers()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 725 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 726 | } |
| 727 | |
| 728 | LValue CodeGenFunction::EmitStringLiteralLValue(const StringLiteral *E) { |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 729 | return LValue::MakeAddr(CGM.GetAddrOfConstantStringFromLiteral(E), 0); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 730 | } |
| 731 | |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 732 | LValue CodeGenFunction::EmitObjCEncodeExprLValue(const ObjCEncodeExpr *E) { |
| 733 | return LValue::MakeAddr(CGM.GetAddrOfConstantStringFromObjCEncode(E), 0); |
| 734 | } |
| 735 | |
| 736 | |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 737 | LValue CodeGenFunction::EmitPredefinedFunctionName(unsigned Type) { |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 738 | std::string GlobalVarName; |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 739 | |
| 740 | switch (Type) { |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 741 | default: |
| 742 | assert(0 && "Invalid type"); |
| 743 | case PredefinedExpr::Func: |
| 744 | GlobalVarName = "__func__."; |
| 745 | break; |
| 746 | case PredefinedExpr::Function: |
| 747 | GlobalVarName = "__FUNCTION__."; |
| 748 | break; |
| 749 | case PredefinedExpr::PrettyFunction: |
| 750 | // FIXME:: Demangle C++ method names |
| 751 | GlobalVarName = "__PRETTY_FUNCTION__."; |
| 752 | break; |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 753 | } |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 754 | |
| 755 | std::string FunctionName; |
Chris Lattner | f1c97eb | 2009-04-21 04:41:23 +0000 | [diff] [blame] | 756 | if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(CurFuncDecl)) { |
Douglas Gregor | 6ec3668 | 2009-02-18 23:53:56 +0000 | [diff] [blame] | 757 | FunctionName = CGM.getMangledName(FD); |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 758 | } else { |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 759 | // Just get the mangled name; skipping the asm prefix if it |
| 760 | // exists. |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 761 | FunctionName = CurFn->getName(); |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 762 | if (FunctionName[0] == '\01') |
| 763 | FunctionName = FunctionName.substr(1, std::string::npos); |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 764 | } |
| 765 | |
Chris Lattner | c8aa5f1 | 2008-04-04 04:07:35 +0000 | [diff] [blame] | 766 | GlobalVarName += FunctionName; |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 767 | llvm::Constant *C = |
| 768 | CGM.GetAddrOfConstantCString(FunctionName, GlobalVarName.c_str()); |
| 769 | return LValue::MakeAddr(C, 0); |
| 770 | } |
| 771 | |
| 772 | LValue CodeGenFunction::EmitPredefinedLValue(const PredefinedExpr *E) { |
| 773 | switch (E->getIdentType()) { |
| 774 | default: |
| 775 | return EmitUnsupportedLValue(E, "predefined expression"); |
| 776 | case PredefinedExpr::Func: |
| 777 | case PredefinedExpr::Function: |
| 778 | case PredefinedExpr::PrettyFunction: |
| 779 | return EmitPredefinedFunctionName(E->getIdentType()); |
| 780 | } |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 781 | } |
| 782 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 783 | LValue CodeGenFunction::EmitArraySubscriptExpr(const ArraySubscriptExpr *E) { |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 784 | // 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] | 785 | llvm::Value *Idx = EmitScalarExpr(E->getIdx()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 786 | |
| 787 | // If the base is a vector type, then we are forming a vector element lvalue |
| 788 | // with this subscript. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 789 | if (E->getBase()->getType()->isVectorType()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 790 | // Emit the vector as an lvalue to get its address. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 791 | LValue LHS = EmitLValue(E->getBase()); |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 792 | assert(LHS.isSimple() && "Can only subscript lvalue vectors here!"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 793 | // FIXME: This should properly sign/zero/extend or truncate Idx to i32. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 794 | return LValue::MakeVectorElt(LHS.getAddress(), Idx, |
| 795 | E->getBase()->getType().getCVRQualifiers()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 796 | } |
| 797 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 798 | // The base must be a pointer, which is not an aggregate. Emit it. |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 799 | llvm::Value *Base = EmitScalarExpr(E->getBase()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 800 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 801 | // Extend or truncate the index type to 32 or 64-bits. |
Chris Lattner | d4f0802 | 2007-08-08 17:43:05 +0000 | [diff] [blame] | 802 | QualType IdxTy = E->getIdx()->getType(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 803 | bool IdxSigned = IdxTy->isSignedIntegerType(); |
| 804 | unsigned IdxBitwidth = cast<llvm::IntegerType>(Idx->getType())->getBitWidth(); |
Sanjiv Gupta | 75c47a5 | 2009-04-08 04:16:39 +0000 | [diff] [blame] | 805 | |
| 806 | // If Pointer width is less than 32 than extend to 32. |
| 807 | unsigned IdxValidWidth = (LLVMPointerWidth < 32 ) ? 32 : LLVMPointerWidth; |
| 808 | if (IdxBitwidth != IdxValidWidth) |
| 809 | Idx = Builder.CreateIntCast(Idx, llvm::IntegerType::get(IdxValidWidth), |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 810 | IdxSigned, "idxprom"); |
| 811 | |
| 812 | // We know that the pointer points to a type of the correct size, unless the |
| 813 | // size is a VLA. |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 814 | if (const VariableArrayType *VAT = |
| 815 | getContext().getAsVariableArrayType(E->getType())) { |
| 816 | llvm::Value *VLASize = VLASizeMap[VAT]; |
| 817 | |
| 818 | Idx = Builder.CreateMul(Idx, VLASize); |
| 819 | |
Anders Carlsson | 6183a99 | 2008-12-21 03:44:36 +0000 | [diff] [blame] | 820 | QualType BaseType = getContext().getBaseElementType(VAT); |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 821 | |
| 822 | uint64_t BaseTypeSize = getContext().getTypeSize(BaseType) / 8; |
| 823 | Idx = Builder.CreateUDiv(Idx, |
| 824 | llvm::ConstantInt::get(Idx->getType(), |
| 825 | BaseTypeSize)); |
| 826 | } |
| 827 | |
Daniel Dunbar | f3ef07c | 2009-04-18 08:54:40 +0000 | [diff] [blame] | 828 | QualType T = E->getBase()->getType()->getAsPointerType()->getPointeeType(); |
| 829 | LValue LV = LValue::MakeAddr(Builder.CreateGEP(Base, Idx, "arrayidx"), |
| 830 | T.getCVRQualifiers(), |
| 831 | getContext().getObjCGCAttrKind(T)); |
Fariborz Jahanian | 643887a | 2009-02-21 23:37:19 +0000 | [diff] [blame] | 832 | if (getContext().getLangOptions().ObjC1 && |
| 833 | getContext().getLangOptions().getGCMode() != LangOptions::NonGC) |
Fariborz Jahanian | 44baa8a | 2009-02-22 18:40:18 +0000 | [diff] [blame] | 834 | LValue::SetObjCNonGC(LV, !E->isOBJCGCCandidate()); |
Fariborz Jahanian | 643887a | 2009-02-21 23:37:19 +0000 | [diff] [blame] | 835 | return LV; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 836 | } |
| 837 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 838 | static |
| 839 | llvm::Constant *GenerateConstantVector(llvm::SmallVector<unsigned, 4> &Elts) { |
| 840 | llvm::SmallVector<llvm::Constant *, 4> CElts; |
| 841 | |
| 842 | for (unsigned i = 0, e = Elts.size(); i != e; ++i) |
| 843 | CElts.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, Elts[i])); |
| 844 | |
| 845 | return llvm::ConstantVector::get(&CElts[0], CElts.size()); |
| 846 | } |
| 847 | |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 848 | LValue CodeGenFunction:: |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 849 | EmitExtVectorElementExpr(const ExtVectorElementExpr *E) { |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 850 | // Emit the base vector as an l-value. |
Chris Lattner | 73525de | 2009-02-16 21:11:58 +0000 | [diff] [blame] | 851 | LValue Base; |
| 852 | |
| 853 | // ExtVectorElementExpr's base can either be a vector or pointer to vector. |
Chris Lattner | 2140e90 | 2009-02-16 22:14:05 +0000 | [diff] [blame] | 854 | if (!E->isArrow()) { |
Chris Lattner | 73525de | 2009-02-16 21:11:58 +0000 | [diff] [blame] | 855 | assert(E->getBase()->getType()->isVectorType()); |
| 856 | Base = EmitLValue(E->getBase()); |
Chris Lattner | 2140e90 | 2009-02-16 22:14:05 +0000 | [diff] [blame] | 857 | } else { |
| 858 | const PointerType *PT = E->getBase()->getType()->getAsPointerType(); |
| 859 | llvm::Value *Ptr = EmitScalarExpr(E->getBase()); |
| 860 | Base = LValue::MakeAddr(Ptr, PT->getPointeeType().getCVRQualifiers()); |
Chris Lattner | 73525de | 2009-02-16 21:11:58 +0000 | [diff] [blame] | 861 | } |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 862 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 863 | // Encode the element access list into a vector of unsigned indices. |
| 864 | llvm::SmallVector<unsigned, 4> Indices; |
| 865 | E->getEncodedElementAccess(Indices); |
| 866 | |
| 867 | if (Base.isSimple()) { |
| 868 | llvm::Constant *CV = GenerateConstantVector(Indices); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 869 | return LValue::MakeExtVectorElt(Base.getAddress(), CV, |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 870 | Base.getQualifiers()); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 871 | } |
| 872 | assert(Base.isExtVectorElt() && "Can only subscript lvalue vec elts here!"); |
| 873 | |
| 874 | llvm::Constant *BaseElts = Base.getExtVectorElts(); |
| 875 | llvm::SmallVector<llvm::Constant *, 4> CElts; |
| 876 | |
| 877 | for (unsigned i = 0, e = Indices.size(); i != e; ++i) { |
| 878 | if (isa<llvm::ConstantAggregateZero>(BaseElts)) |
| 879 | CElts.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, 0)); |
| 880 | else |
| 881 | CElts.push_back(BaseElts->getOperand(Indices[i])); |
| 882 | } |
| 883 | llvm::Constant *CV = llvm::ConstantVector::get(&CElts[0], CElts.size()); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 884 | return LValue::MakeExtVectorElt(Base.getExtVectorAddr(), CV, |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 885 | Base.getQualifiers()); |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 886 | } |
| 887 | |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 888 | LValue CodeGenFunction::EmitMemberExpr(const MemberExpr *E) { |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 889 | bool isUnion = false; |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 890 | bool isIvar = false; |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 891 | bool isNonGC = false; |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 892 | Expr *BaseExpr = E->getBase(); |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 893 | llvm::Value *BaseValue = NULL; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 894 | unsigned CVRQualifiers=0; |
| 895 | |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 896 | // 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] | 897 | if (E->isArrow()) { |
Devang Patel | 0a96118 | 2007-10-26 18:15:21 +0000 | [diff] [blame] | 898 | BaseValue = EmitScalarExpr(BaseExpr); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 899 | const PointerType *PTy = |
Daniel Dunbar | f3ef07c | 2009-04-18 08:54:40 +0000 | [diff] [blame] | 900 | BaseExpr->getType()->getAsPointerType(); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 901 | if (PTy->getPointeeType()->isUnionType()) |
| 902 | isUnion = true; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 903 | CVRQualifiers = PTy->getPointeeType().getCVRQualifiers(); |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 904 | } else if (isa<ObjCPropertyRefExpr>(BaseExpr) || |
| 905 | isa<ObjCKVCRefExpr>(BaseExpr)) { |
Fariborz Jahanian | 35c3329 | 2009-01-12 23:27:26 +0000 | [diff] [blame] | 906 | RValue RV = EmitObjCPropertyGet(BaseExpr); |
| 907 | BaseValue = RV.getAggregateAddr(); |
| 908 | if (BaseExpr->getType()->isUnionType()) |
| 909 | isUnion = true; |
| 910 | CVRQualifiers = BaseExpr->getType().getCVRQualifiers(); |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 911 | } else { |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 912 | LValue BaseLV = EmitLValue(BaseExpr); |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 913 | if (BaseLV.isObjCIvar()) |
| 914 | isIvar = true; |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 915 | if (BaseLV.isNonGC()) |
| 916 | isNonGC = true; |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 917 | // FIXME: this isn't right for bitfields. |
| 918 | BaseValue = BaseLV.getAddress(); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 919 | if (BaseExpr->getType()->isUnionType()) |
| 920 | isUnion = true; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 921 | CVRQualifiers = BaseExpr->getType().getCVRQualifiers(); |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 922 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 923 | |
Douglas Gregor | 86f1940 | 2008-12-20 23:49:58 +0000 | [diff] [blame] | 924 | FieldDecl *Field = dyn_cast<FieldDecl>(E->getMemberDecl()); |
| 925 | // FIXME: Handle non-field member expressions |
| 926 | assert(Field && "No code generation for non-field member references"); |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 927 | LValue MemExpLV = EmitLValueForField(BaseValue, Field, isUnion, |
| 928 | CVRQualifiers); |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 929 | LValue::SetObjCIvar(MemExpLV, isIvar); |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 930 | LValue::SetObjCNonGC(MemExpLV, isNonGC); |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 931 | return MemExpLV; |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 932 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 933 | |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 934 | LValue CodeGenFunction::EmitLValueForBitfield(llvm::Value* BaseValue, |
| 935 | FieldDecl* Field, |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 936 | unsigned CVRQualifiers) { |
Daniel Dunbar | bb76773 | 2009-02-17 18:31:04 +0000 | [diff] [blame] | 937 | unsigned idx = CGM.getTypes().getLLVMFieldNo(Field); |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 938 | // FIXME: CodeGenTypes should expose a method to get the appropriate |
| 939 | // type for FieldTy (the appropriate type is ABI-dependent). |
Daniel Dunbar | bb76773 | 2009-02-17 18:31:04 +0000 | [diff] [blame] | 940 | const llvm::Type *FieldTy = |
| 941 | CGM.getTypes().ConvertTypeForMem(Field->getType()); |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 942 | const llvm::PointerType *BaseTy = |
| 943 | cast<llvm::PointerType>(BaseValue->getType()); |
| 944 | unsigned AS = BaseTy->getAddressSpace(); |
| 945 | BaseValue = Builder.CreateBitCast(BaseValue, |
| 946 | llvm::PointerType::get(FieldTy, AS), |
| 947 | "tmp"); |
| 948 | llvm::Value *V = Builder.CreateGEP(BaseValue, |
| 949 | llvm::ConstantInt::get(llvm::Type::Int32Ty, idx), |
| 950 | "tmp"); |
| 951 | |
| 952 | CodeGenTypes::BitFieldInfo bitFieldInfo = |
| 953 | CGM.getTypes().getBitFieldInfo(Field); |
| 954 | return LValue::MakeBitfield(V, bitFieldInfo.Begin, bitFieldInfo.Size, |
| 955 | Field->getType()->isSignedIntegerType(), |
| 956 | Field->getType().getCVRQualifiers()|CVRQualifiers); |
| 957 | } |
| 958 | |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 959 | LValue CodeGenFunction::EmitLValueForField(llvm::Value* BaseValue, |
| 960 | FieldDecl* Field, |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 961 | bool isUnion, |
| 962 | unsigned CVRQualifiers) |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 963 | { |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 964 | if (Field->isBitField()) |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 965 | return EmitLValueForBitfield(BaseValue, Field, CVRQualifiers); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 966 | |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 967 | unsigned idx = CGM.getTypes().getLLVMFieldNo(Field); |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 968 | llvm::Value *V = Builder.CreateStructGEP(BaseValue, idx, "tmp"); |
Eli Friedman | 1e86b34 | 2008-05-29 11:33:25 +0000 | [diff] [blame] | 969 | |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 970 | // Match union field type. |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 971 | if (isUnion) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 972 | const llvm::Type *FieldTy = |
| 973 | CGM.getTypes().ConvertTypeForMem(Field->getType()); |
Devang Patel | e9b8c0a | 2007-10-30 20:59:40 +0000 | [diff] [blame] | 974 | const llvm::PointerType * BaseTy = |
| 975 | cast<llvm::PointerType>(BaseValue->getType()); |
Eli Friedman | 788d571 | 2008-05-21 13:24:44 +0000 | [diff] [blame] | 976 | unsigned AS = BaseTy->getAddressSpace(); |
| 977 | V = Builder.CreateBitCast(V, |
| 978 | llvm::PointerType::get(FieldTy, AS), |
| 979 | "tmp"); |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 980 | } |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 981 | |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 982 | QualType::GCAttrTypes attr = QualType::GCNone; |
Fariborz Jahanian | ba372b8 | 2009-02-18 17:52:36 +0000 | [diff] [blame] | 983 | if (CGM.getLangOptions().ObjC1 && |
Fariborz Jahanian | 5934e75 | 2009-02-18 18:52:41 +0000 | [diff] [blame] | 984 | CGM.getLangOptions().getGCMode() != LangOptions::NonGC) { |
| 985 | QualType Ty = Field->getType(); |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 986 | attr = Ty.getObjCGCAttr(); |
Fariborz Jahanian | c1debf3 | 2009-02-19 00:48:05 +0000 | [diff] [blame] | 987 | if (attr != QualType::GCNone) { |
Fariborz Jahanian | 5934e75 | 2009-02-18 18:52:41 +0000 | [diff] [blame] | 988 | // __weak attribute on a field is ignored. |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 989 | if (attr == QualType::Weak) |
| 990 | attr = QualType::GCNone; |
Fariborz Jahanian | c1debf3 | 2009-02-19 00:48:05 +0000 | [diff] [blame] | 991 | } |
Fariborz Jahanian | 5934e75 | 2009-02-18 18:52:41 +0000 | [diff] [blame] | 992 | else if (getContext().isObjCObjectPointerType(Ty)) |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 993 | attr = QualType::Strong; |
Fariborz Jahanian | 5934e75 | 2009-02-18 18:52:41 +0000 | [diff] [blame] | 994 | } |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 995 | LValue LV = |
| 996 | LValue::MakeAddr(V, |
| 997 | Field->getType().getCVRQualifiers()|CVRQualifiers, |
| 998 | attr); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 999 | return LV; |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1000 | } |
| 1001 | |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 1002 | LValue CodeGenFunction::EmitCompoundLiteralLValue(const CompoundLiteralExpr* E){ |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 1003 | const llvm::Type *LTy = ConvertType(E->getType()); |
| 1004 | llvm::Value *DeclPtr = CreateTempAlloca(LTy, ".compoundliteral"); |
| 1005 | |
| 1006 | const Expr* InitExpr = E->getInitializer(); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1007 | LValue Result = LValue::MakeAddr(DeclPtr, E->getType().getCVRQualifiers()); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 1008 | |
| 1009 | if (E->getType()->isComplexType()) { |
| 1010 | EmitComplexExprIntoAddr(InitExpr, DeclPtr, false); |
| 1011 | } else if (hasAggregateLLVMType(E->getType())) { |
| 1012 | EmitAnyExpr(InitExpr, DeclPtr, false); |
| 1013 | } else { |
| 1014 | EmitStoreThroughLValue(EmitAnyExpr(InitExpr), Result, E->getType()); |
| 1015 | } |
| 1016 | |
| 1017 | return Result; |
| 1018 | } |
| 1019 | |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 1020 | LValue CodeGenFunction::EmitConditionalOperator(const ConditionalOperator* E) { |
| 1021 | // We don't handle vectors yet. |
| 1022 | if (E->getType()->isVectorType()) |
| 1023 | return EmitUnsupportedLValue(E, "conditional operator"); |
| 1024 | |
| 1025 | // ?: here should be an aggregate. |
| 1026 | assert((hasAggregateLLVMType(E->getType()) && |
| 1027 | !E->getType()->isAnyComplexType()) && |
| 1028 | "Unexpected conditional operator!"); |
| 1029 | |
| 1030 | llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType())); |
| 1031 | EmitAggExpr(E, Temp, false); |
| 1032 | |
| 1033 | return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers(), |
| 1034 | getContext().getObjCGCAttrKind(E->getType())); |
| 1035 | |
| 1036 | } |
| 1037 | |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 1038 | /// EmitCastLValue - Casts are never lvalues. If a cast is needed by the code |
| 1039 | /// generator in an lvalue context, then it must mean that we need the address |
| 1040 | /// of an aggregate in order to access one of its fields. This can happen for |
| 1041 | /// all the reasons that casts are permitted with aggregate result, including |
| 1042 | /// noop aggregate casts, and cast from scalar to union. |
| 1043 | LValue CodeGenFunction::EmitCastLValue(const CastExpr *E) { |
| 1044 | // If this is an aggregate-to-aggregate cast, just use the input's address as |
| 1045 | // the lvalue. |
| 1046 | if (getContext().hasSameUnqualifiedType(E->getType(), |
| 1047 | E->getSubExpr()->getType())) |
| 1048 | return EmitLValue(E->getSubExpr()); |
| 1049 | |
| 1050 | // Otherwise, we must have a cast from scalar to union. |
| 1051 | assert(E->getType()->isUnionType() && "Expected scalar-to-union cast"); |
| 1052 | |
| 1053 | // Casts are only lvalues when the source and destination types are the same. |
| 1054 | llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType())); |
Chris Lattner | 40f9292 | 2009-03-18 18:30:44 +0000 | [diff] [blame] | 1055 | EmitAnyExpr(E->getSubExpr(), Temp, false); |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 1056 | |
| 1057 | return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers(), |
| 1058 | getContext().getObjCGCAttrKind(E->getType())); |
| 1059 | } |
| 1060 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1061 | //===--------------------------------------------------------------------===// |
| 1062 | // Expression Emission |
| 1063 | //===--------------------------------------------------------------------===// |
| 1064 | |
Chris Lattner | 7016a70 | 2007-08-20 22:37:10 +0000 | [diff] [blame] | 1065 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1066 | RValue CodeGenFunction::EmitCallExpr(const CallExpr *E) { |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 1067 | // Builtins never have block type. |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 1068 | if (E->getCallee()->getType()->isBlockPointerType()) |
Anders Carlsson | acfde80 | 2009-02-12 00:39:25 +0000 | [diff] [blame] | 1069 | return EmitBlockCallExpr(E); |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 1070 | |
Anders Carlsson | 774e7c6 | 2009-04-03 22:50:24 +0000 | [diff] [blame] | 1071 | if (const CXXMemberCallExpr *CE = dyn_cast<CXXMemberCallExpr>(E)) |
| 1072 | return EmitCXXMemberCallExpr(CE); |
| 1073 | |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 1074 | const Decl *TargetDecl = 0; |
Daniel Dunbar | dd7b897 | 2009-02-20 19:34:33 +0000 | [diff] [blame] | 1075 | if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E->getCallee())) { |
| 1076 | if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CE->getSubExpr())) { |
| 1077 | TargetDecl = DRE->getDecl(); |
| 1078 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(TargetDecl)) |
| 1079 | if (unsigned builtinID = FD->getBuiltinID(getContext())) |
| 1080 | return EmitBuiltinExpr(FD, builtinID, E); |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 1081 | } |
| 1082 | } |
| 1083 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1084 | llvm::Value *Callee = EmitScalarExpr(E->getCallee()); |
Eli Friedman | 5193b8a | 2008-01-30 01:32:06 +0000 | [diff] [blame] | 1085 | return EmitCallExpr(Callee, E->getCallee()->getType(), |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 1086 | E->arg_begin(), E->arg_end(), TargetDecl); |
Chris Lattner | c5e940f | 2007-08-31 04:44:06 +0000 | [diff] [blame] | 1087 | } |
| 1088 | |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 1089 | LValue CodeGenFunction::EmitBinaryOperatorLValue(const BinaryOperator *E) { |
| 1090 | // Can only get l-value for binary operator expressions which are a |
| 1091 | // simple assignment of aggregate type. |
| 1092 | if (E->getOpcode() != BinaryOperator::Assign) |
| 1093 | return EmitUnsupportedLValue(E, "binary l-value expression"); |
| 1094 | |
| 1095 | llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType())); |
| 1096 | EmitAggExpr(E, Temp, false); |
| 1097 | // FIXME: Are these qualifiers correct? |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 1098 | return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers(), |
| 1099 | getContext().getObjCGCAttrKind(E->getType())); |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 1100 | } |
| 1101 | |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 1102 | LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E) { |
| 1103 | // Can only get l-value for call expression returning aggregate type |
| 1104 | RValue RV = EmitCallExpr(E); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1105 | return LValue::MakeAddr(RV.getAggregateAddr(), |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 1106 | E->getType().getCVRQualifiers(), |
| 1107 | getContext().getObjCGCAttrKind(E->getType())); |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 1108 | } |
| 1109 | |
Daniel Dunbar | 5b5c9ef | 2009-02-11 20:59:32 +0000 | [diff] [blame] | 1110 | LValue CodeGenFunction::EmitVAArgExprLValue(const VAArgExpr *E) { |
| 1111 | // FIXME: This shouldn't require another copy. |
| 1112 | llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType())); |
| 1113 | EmitAggExpr(E, Temp, false); |
| 1114 | return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers()); |
| 1115 | } |
| 1116 | |
Argyrios Kyrtzidis | e3a09e6 | 2008-09-10 02:36:38 +0000 | [diff] [blame] | 1117 | LValue |
| 1118 | CodeGenFunction::EmitCXXConditionDeclLValue(const CXXConditionDeclExpr *E) { |
| 1119 | EmitLocalBlockVarDecl(*E->getVarDecl()); |
| 1120 | return EmitDeclRefLValue(E); |
| 1121 | } |
| 1122 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 1123 | LValue CodeGenFunction::EmitObjCMessageExprLValue(const ObjCMessageExpr *E) { |
| 1124 | // Can only get l-value for message expression returning aggregate type |
| 1125 | RValue RV = EmitObjCMessageExpr(E); |
| 1126 | // FIXME: can this be volatile? |
| 1127 | return LValue::MakeAddr(RV.getAggregateAddr(), |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 1128 | E->getType().getCVRQualifiers(), |
| 1129 | getContext().getObjCGCAttrKind(E->getType())); |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 1130 | } |
| 1131 | |
Daniel Dunbar | 2a03192 | 2009-04-22 05:08:15 +0000 | [diff] [blame^] | 1132 | llvm::Value *CodeGenFunction::EmitIvarOffset(const ObjCInterfaceDecl *Interface, |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 1133 | const ObjCIvarDecl *Ivar) { |
Fariborz Jahanian | f63aa3f | 2009-02-10 19:02:04 +0000 | [diff] [blame] | 1134 | return CGM.getObjCRuntime().EmitIvarOffset(*this, Interface, Ivar); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 1135 | } |
| 1136 | |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 1137 | LValue CodeGenFunction::EmitLValueForIvar(QualType ObjectTy, |
| 1138 | llvm::Value *BaseValue, |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 1139 | const ObjCIvarDecl *Ivar, |
| 1140 | unsigned CVRQualifiers) { |
Chris Lattner | 26f074b | 2009-04-17 17:44:48 +0000 | [diff] [blame] | 1141 | return CGM.getObjCRuntime().EmitObjCValueForIvar(*this, ObjectTy, BaseValue, |
Daniel Dunbar | 525c9b7 | 2009-04-21 01:19:28 +0000 | [diff] [blame] | 1142 | Ivar, CVRQualifiers); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 1143 | } |
| 1144 | |
| 1145 | LValue CodeGenFunction::EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E) { |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 1146 | // FIXME: A lot of the code below could be shared with EmitMemberExpr. |
| 1147 | llvm::Value *BaseValue = 0; |
| 1148 | const Expr *BaseExpr = E->getBase(); |
| 1149 | unsigned CVRQualifiers = 0; |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 1150 | QualType ObjectTy; |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 1151 | if (E->isArrow()) { |
| 1152 | BaseValue = EmitScalarExpr(BaseExpr); |
Daniel Dunbar | f3ef07c | 2009-04-18 08:54:40 +0000 | [diff] [blame] | 1153 | const PointerType *PTy = BaseExpr->getType()->getAsPointerType(); |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 1154 | ObjectTy = PTy->getPointeeType(); |
| 1155 | CVRQualifiers = ObjectTy.getCVRQualifiers(); |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 1156 | } else { |
| 1157 | LValue BaseLV = EmitLValue(BaseExpr); |
| 1158 | // FIXME: this isn't right for bitfields. |
| 1159 | BaseValue = BaseLV.getAddress(); |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 1160 | ObjectTy = BaseExpr->getType(); |
| 1161 | CVRQualifiers = ObjectTy.getCVRQualifiers(); |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 1162 | } |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 1163 | |
Daniel Dunbar | 525c9b7 | 2009-04-21 01:19:28 +0000 | [diff] [blame] | 1164 | return EmitLValueForIvar(ObjectTy, BaseValue, E->getDecl(), CVRQualifiers); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 1165 | } |
| 1166 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 1167 | LValue |
| 1168 | CodeGenFunction::EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E) { |
| 1169 | // This is a special l-value that just issues sends when we load or |
| 1170 | // store through it. |
| 1171 | return LValue::MakePropertyRef(E, E->getType().getCVRQualifiers()); |
| 1172 | } |
| 1173 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 1174 | LValue |
| 1175 | CodeGenFunction::EmitObjCKVCRefLValue(const ObjCKVCRefExpr *E) { |
| 1176 | // This is a special l-value that just issues sends when we load or |
| 1177 | // store through it. |
| 1178 | return LValue::MakeKVCRef(E, E->getType().getCVRQualifiers()); |
| 1179 | } |
| 1180 | |
Douglas Gregor | cd9b46e | 2008-11-04 14:56:14 +0000 | [diff] [blame] | 1181 | LValue |
| 1182 | CodeGenFunction::EmitObjCSuperExpr(const ObjCSuperExpr *E) { |
| 1183 | return EmitUnsupportedLValue(E, "use of super"); |
| 1184 | } |
| 1185 | |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 1186 | RValue CodeGenFunction::EmitCallExpr(llvm::Value *Callee, QualType CalleeType, |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1187 | CallExpr::const_arg_iterator ArgBeg, |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 1188 | CallExpr::const_arg_iterator ArgEnd, |
| 1189 | const Decl *TargetDecl) { |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 1190 | // Get the actual function type. The callee type will always be a |
| 1191 | // pointer to function type or a block pointer type. |
Anders Carlsson | 8ac67a7 | 2009-04-07 18:53:02 +0000 | [diff] [blame] | 1192 | assert(CalleeType->isFunctionPointerType() && |
| 1193 | "Call must have function pointer type!"); |
| 1194 | |
| 1195 | QualType FnType = CalleeType->getAsPointerType()->getPointeeType(); |
| 1196 | QualType ResultType = FnType->getAsFunctionType()->getResultType(); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 1197 | |
| 1198 | CallArgList Args; |
Anders Carlsson | 782f397 | 2009-04-08 23:13:16 +0000 | [diff] [blame] | 1199 | EmitCallArgs(Args, FnType->getAsFunctionProtoType(), ArgBeg, ArgEnd); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 1200 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 1201 | return EmitCall(CGM.getTypes().getFunctionInfo(ResultType, Args), |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 1202 | Callee, Args, TargetDecl); |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 1203 | } |