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) { |
| 32 | return new llvm::AllocaInst(Ty, 0, Name, AllocaInsertPt); |
| 33 | } |
| 34 | |
| 35 | /// EvaluateExprAsBool - Perform the usual unary conversions on the specified |
| 36 | /// expression and compare the result against zero, returning an Int1Ty value. |
| 37 | llvm::Value *CodeGenFunction::EvaluateExprAsBool(const Expr *E) { |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 38 | QualType BoolTy = getContext().BoolTy; |
Chris Lattner | 9b2dc28 | 2008-04-04 16:54:41 +0000 | [diff] [blame] | 39 | if (!E->getType()->isAnyComplexType()) |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 40 | return EmitScalarConversion(EmitScalarExpr(E), E->getType(), BoolTy); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 41 | |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 42 | return EmitComplexToScalarConversion(EmitComplexExpr(E), E->getType(),BoolTy); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 43 | } |
| 44 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 45 | /// EmitAnyExpr - Emit code to compute the specified expression which can have |
| 46 | /// any type. The result is returned as an RValue struct. If this is an |
| 47 | /// aggregate expression, the aggloc/agglocvolatile arguments indicate where |
| 48 | /// the result should be returned. |
| 49 | RValue CodeGenFunction::EmitAnyExpr(const Expr *E, llvm::Value *AggLoc, |
| 50 | bool isAggLocVolatile) { |
| 51 | if (!hasAggregateLLVMType(E->getType())) |
| 52 | return RValue::get(EmitScalarExpr(E)); |
Chris Lattner | 9b2dc28 | 2008-04-04 16:54:41 +0000 | [diff] [blame] | 53 | else if (E->getType()->isAnyComplexType()) |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 54 | return RValue::getComplex(EmitComplexExpr(E)); |
| 55 | |
| 56 | EmitAggExpr(E, AggLoc, isAggLocVolatile); |
| 57 | return RValue::getAggregate(AggLoc); |
| 58 | } |
| 59 | |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 60 | /// EmitAnyExprToTemp - Similary to EmitAnyExpr(), however, the result |
| 61 | /// will always be accessible even if no aggregate location is |
| 62 | /// provided. |
| 63 | RValue CodeGenFunction::EmitAnyExprToTemp(const Expr *E, llvm::Value *AggLoc, |
| 64 | bool isAggLocVolatile) { |
| 65 | if (!AggLoc && hasAggregateLLVMType(E->getType()) && |
| 66 | !E->getType()->isAnyComplexType()) |
| 67 | AggLoc = CreateTempAlloca(ConvertType(E->getType()), "agg.tmp"); |
| 68 | return EmitAnyExpr(E, AggLoc, isAggLocVolatile); |
| 69 | } |
| 70 | |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 71 | /// getAccessedFieldNo - Given an encoded value and a result number, return |
| 72 | /// the input field number being accessed. |
| 73 | unsigned CodeGenFunction::getAccessedFieldNo(unsigned Idx, |
| 74 | const llvm::Constant *Elts) { |
| 75 | if (isa<llvm::ConstantAggregateZero>(Elts)) |
| 76 | return 0; |
| 77 | |
| 78 | return cast<llvm::ConstantInt>(Elts->getOperand(Idx))->getZExtValue(); |
| 79 | } |
| 80 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 81 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 82 | //===----------------------------------------------------------------------===// |
| 83 | // LValue Expression Emission |
| 84 | //===----------------------------------------------------------------------===// |
| 85 | |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 86 | LValue CodeGenFunction::EmitUnsupportedLValue(const Expr *E, |
| 87 | const char *Name) { |
| 88 | ErrorUnsupported(E, Name); |
| 89 | llvm::Type *Ty = llvm::PointerType::getUnqual(ConvertType(E->getType())); |
| 90 | return LValue::MakeAddr(llvm::UndefValue::get(Ty), |
| 91 | E->getType().getCVRQualifiers()); |
| 92 | } |
| 93 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 94 | /// EmitLValue - Emit code to compute a designator that specifies the location |
| 95 | /// of the expression. |
| 96 | /// |
| 97 | /// This can return one of two things: a simple address or a bitfield |
| 98 | /// reference. In either case, the LLVM Value* in the LValue structure is |
| 99 | /// guaranteed to be an LLVM pointer type. |
| 100 | /// |
| 101 | /// If this returns a bitfield reference, nothing about the pointee type of |
| 102 | /// the LLVM value is known: For example, it may not be a pointer to an |
| 103 | /// integer. |
| 104 | /// |
| 105 | /// If this returns a normal address, and if the lvalue's C type is fixed |
| 106 | /// size, this method guarantees that the returned pointer type will point to |
| 107 | /// an LLVM type of the same size of the lvalue's type. If the lvalue has a |
| 108 | /// variable length type, this is not possible. |
| 109 | /// |
| 110 | LValue CodeGenFunction::EmitLValue(const Expr *E) { |
| 111 | switch (E->getStmtClass()) { |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 112 | default: return EmitUnsupportedLValue(E, "l-value expression"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 113 | |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 114 | case Expr::BinaryOperatorClass: |
| 115 | return EmitBinaryOperatorLValue(cast<BinaryOperator>(E)); |
Douglas Gregor | b460980 | 2008-11-14 16:09:21 +0000 | [diff] [blame] | 116 | case Expr::CallExprClass: |
| 117 | case Expr::CXXOperatorCallExprClass: |
| 118 | return EmitCallExprLValue(cast<CallExpr>(E)); |
Douglas Gregor | 1a49af9 | 2009-01-06 05:10:23 +0000 | [diff] [blame^] | 119 | case Expr::DeclRefExprClass: |
| 120 | case Expr::QualifiedDeclRefExprClass: |
| 121 | return EmitDeclRefLValue(cast<DeclRefExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 122 | case Expr::ParenExprClass:return EmitLValue(cast<ParenExpr>(E)->getSubExpr()); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 123 | case Expr::PredefinedExprClass: |
| 124 | return EmitPredefinedLValue(cast<PredefinedExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 125 | case Expr::StringLiteralClass: |
| 126 | return EmitStringLiteralLValue(cast<StringLiteral>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 127 | |
Argyrios Kyrtzidis | e3a09e6 | 2008-09-10 02:36:38 +0000 | [diff] [blame] | 128 | case Expr::CXXConditionDeclExprClass: |
| 129 | return EmitCXXConditionDeclLValue(cast<CXXConditionDeclExpr>(E)); |
| 130 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 131 | case Expr::ObjCMessageExprClass: |
| 132 | return EmitObjCMessageExprLValue(cast<ObjCMessageExpr>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 133 | case Expr::ObjCIvarRefExprClass: |
| 134 | return EmitObjCIvarRefLValue(cast<ObjCIvarRefExpr>(E)); |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 135 | case Expr::ObjCPropertyRefExprClass: |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 136 | return EmitObjCPropertyRefLValue(cast<ObjCPropertyRefExpr>(E)); |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 137 | case Expr::ObjCKVCRefExprClass: |
| 138 | return EmitObjCKVCRefLValue(cast<ObjCKVCRefExpr>(E)); |
Douglas Gregor | cd9b46e | 2008-11-04 14:56:14 +0000 | [diff] [blame] | 139 | case Expr::ObjCSuperExprClass: |
| 140 | return EmitObjCSuperExpr(cast<ObjCSuperExpr>(E)); |
| 141 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 142 | case Expr::UnaryOperatorClass: |
| 143 | return EmitUnaryOpLValue(cast<UnaryOperator>(E)); |
| 144 | case Expr::ArraySubscriptExprClass: |
| 145 | return EmitArraySubscriptExpr(cast<ArraySubscriptExpr>(E)); |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 146 | case Expr::ExtVectorElementExprClass: |
| 147 | return EmitExtVectorElementExpr(cast<ExtVectorElementExpr>(E)); |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 148 | case Expr::MemberExprClass: return EmitMemberExpr(cast<MemberExpr>(E)); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 149 | case Expr::CompoundLiteralExprClass: |
| 150 | return EmitCompoundLiteralLValue(cast<CompoundLiteralExpr>(E)); |
Chris Lattner | 670a62c | 2008-12-12 05:35:08 +0000 | [diff] [blame] | 151 | case Expr::ChooseExprClass: |
| 152 | // __builtin_choose_expr is the lvalue of the selected operand. |
| 153 | if (cast<ChooseExpr>(E)->isConditionTrue(getContext())) |
| 154 | return EmitLValue(cast<ChooseExpr>(E)->getLHS()); |
| 155 | else |
| 156 | return EmitLValue(cast<ChooseExpr>(E)->getRHS()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 157 | } |
| 158 | } |
| 159 | |
| 160 | /// EmitLoadOfLValue - Given an expression that represents a value lvalue, |
| 161 | /// this method emits the address of the lvalue, then loads the result as an |
| 162 | /// rvalue, returning the rvalue. |
| 163 | RValue CodeGenFunction::EmitLoadOfLValue(LValue LV, QualType ExprType) { |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 164 | if (LV.isObjCWeak()) { |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 165 | // load of a __weak object. |
| 166 | llvm::Value *AddrWeakObj = LV.getAddress(); |
Fariborz Jahanian | 3e283e3 | 2008-11-18 22:37:34 +0000 | [diff] [blame] | 167 | llvm::Value *read_weak = CGM.getObjCRuntime().EmitObjCWeakRead(*this, |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 168 | AddrWeakObj); |
| 169 | return RValue::get(read_weak); |
| 170 | } |
| 171 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 172 | if (LV.isSimple()) { |
| 173 | llvm::Value *Ptr = LV.getAddress(); |
| 174 | const llvm::Type *EltTy = |
| 175 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
| 176 | |
| 177 | // Simple scalar l-value. |
Dan Gohman | d79a726 | 2008-05-22 22:12:56 +0000 | [diff] [blame] | 178 | if (EltTy->isSingleValueType()) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 179 | llvm::Value *V = Builder.CreateLoad(Ptr, LV.isVolatileQualified(),"tmp"); |
Chris Lattner | 01e3c9e | 2008-01-30 07:01:17 +0000 | [diff] [blame] | 180 | |
| 181 | // Bool can have different representation in memory than in registers. |
| 182 | if (ExprType->isBooleanType()) { |
| 183 | if (V->getType() != llvm::Type::Int1Ty) |
| 184 | V = Builder.CreateTrunc(V, llvm::Type::Int1Ty, "tobool"); |
| 185 | } |
| 186 | |
| 187 | return RValue::get(V); |
| 188 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 189 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 190 | assert(ExprType->isFunctionType() && "Unknown scalar value"); |
| 191 | return RValue::get(Ptr); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | if (LV.isVectorElt()) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 195 | llvm::Value *Vec = Builder.CreateLoad(LV.getVectorAddr(), |
| 196 | LV.isVolatileQualified(), "tmp"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 197 | return RValue::get(Builder.CreateExtractElement(Vec, LV.getVectorIdx(), |
| 198 | "vecext")); |
| 199 | } |
Chris Lattner | 46ea8eb | 2007-08-03 00:16:29 +0000 | [diff] [blame] | 200 | |
| 201 | // If this is a reference to a subset of the elements of a vector, either |
| 202 | // shuffle the input or extract/insert them as appropriate. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 203 | if (LV.isExtVectorElt()) |
| 204 | return EmitLoadOfExtVectorElementLValue(LV, ExprType); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 205 | |
| 206 | if (LV.isBitfield()) |
| 207 | return EmitLoadOfBitfieldLValue(LV, ExprType); |
| 208 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 209 | if (LV.isPropertyRef()) |
| 210 | return EmitLoadOfPropertyRefLValue(LV, ExprType); |
| 211 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 212 | if (LV.isKVCRef()) |
| 213 | return EmitLoadOfKVCRefLValue(LV, ExprType); |
| 214 | |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 215 | assert(0 && "Unknown LValue type!"); |
Chris Lattner | b1776cb | 2007-09-16 19:23:47 +0000 | [diff] [blame] | 216 | //an invalid RValue, but the assert will |
| 217 | //ensure that this point is never reached |
| 218 | return RValue(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 219 | } |
| 220 | |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 221 | RValue CodeGenFunction::EmitLoadOfBitfieldLValue(LValue LV, |
| 222 | QualType ExprType) { |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 223 | unsigned StartBit = LV.getBitfieldStartBit(); |
| 224 | unsigned BitfieldSize = LV.getBitfieldSize(); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 225 | llvm::Value *Ptr = LV.getBitfieldAddr(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 226 | |
| 227 | const llvm::Type *EltTy = |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 228 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 229 | unsigned EltTySize = CGM.getTargetData().getTypeSizeInBits(EltTy); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 230 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 231 | // In some cases the bitfield may straddle two memory locations. |
| 232 | // Currently we load the entire bitfield, then do the magic to |
| 233 | // sign-extend it if necessary. This results in somewhat more code |
| 234 | // than necessary for the common case (one load), since two shifts |
| 235 | // accomplish both the masking and sign extension. |
| 236 | unsigned LowBits = std::min(BitfieldSize, EltTySize - StartBit); |
| 237 | llvm::Value *Val = Builder.CreateLoad(Ptr, LV.isVolatileQualified(), "tmp"); |
| 238 | |
| 239 | // Shift to proper location. |
Daniel Dunbar | f3edc2f | 2008-11-13 02:20:34 +0000 | [diff] [blame] | 240 | if (StartBit) |
| 241 | Val = Builder.CreateLShr(Val, llvm::ConstantInt::get(EltTy, StartBit), |
| 242 | "bf.lo"); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 243 | |
| 244 | // Mask off unused bits. |
| 245 | llvm::Constant *LowMask = |
| 246 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, LowBits)); |
| 247 | Val = Builder.CreateAnd(Val, LowMask, "bf.lo.cleared"); |
| 248 | |
| 249 | // Fetch the high bits if necessary. |
| 250 | if (LowBits < BitfieldSize) { |
| 251 | unsigned HighBits = BitfieldSize - LowBits; |
| 252 | llvm::Value *HighPtr = |
| 253 | Builder.CreateGEP(Ptr, llvm::ConstantInt::get(llvm::Type::Int32Ty, 1), |
| 254 | "bf.ptr.hi"); |
| 255 | llvm::Value *HighVal = Builder.CreateLoad(HighPtr, |
| 256 | LV.isVolatileQualified(), |
| 257 | "tmp"); |
| 258 | |
| 259 | // Mask off unused bits. |
| 260 | llvm::Constant *HighMask = |
| 261 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, HighBits)); |
| 262 | HighVal = Builder.CreateAnd(HighVal, HighMask, "bf.lo.cleared"); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 263 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 264 | // Shift to proper location and or in to bitfield value. |
| 265 | HighVal = Builder.CreateShl(HighVal, |
| 266 | llvm::ConstantInt::get(EltTy, LowBits)); |
| 267 | Val = Builder.CreateOr(Val, HighVal, "bf.val"); |
| 268 | } |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 269 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 270 | // Sign extend if necessary. |
| 271 | if (LV.isBitfieldSigned()) { |
| 272 | llvm::Value *ExtraBits = llvm::ConstantInt::get(EltTy, |
| 273 | EltTySize - BitfieldSize); |
| 274 | Val = Builder.CreateAShr(Builder.CreateShl(Val, ExtraBits), |
| 275 | ExtraBits, "bf.val.sext"); |
| 276 | } |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 277 | |
| 278 | // The bitfield type and the normal type differ when the storage sizes |
| 279 | // differ (currently just _Bool). |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 280 | Val = Builder.CreateIntCast(Val, ConvertType(ExprType), false, "tmp"); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 281 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 282 | return RValue::get(Val); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 283 | } |
| 284 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 285 | RValue CodeGenFunction::EmitLoadOfPropertyRefLValue(LValue LV, |
| 286 | QualType ExprType) { |
| 287 | return EmitObjCPropertyGet(LV.getPropertyRefExpr()); |
| 288 | } |
| 289 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 290 | RValue CodeGenFunction::EmitLoadOfKVCRefLValue(LValue LV, |
| 291 | QualType ExprType) { |
| 292 | return EmitObjCPropertyGet(LV.getKVCRefExpr()); |
| 293 | } |
| 294 | |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 295 | // If this is a reference to a subset of the elements of a vector, either |
| 296 | // shuffle the input or extract/insert them as appropriate. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 297 | RValue CodeGenFunction::EmitLoadOfExtVectorElementLValue(LValue LV, |
| 298 | QualType ExprType) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 299 | llvm::Value *Vec = Builder.CreateLoad(LV.getExtVectorAddr(), |
| 300 | LV.isVolatileQualified(), "tmp"); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 301 | |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 302 | const llvm::Constant *Elts = LV.getExtVectorElts(); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 303 | |
| 304 | // If the result of the expression is a non-vector type, we must be |
| 305 | // extracting a single element. Just codegen as an extractelement. |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 306 | const VectorType *ExprVT = ExprType->getAsVectorType(); |
| 307 | if (!ExprVT) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 308 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 309 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx); |
| 310 | return RValue::get(Builder.CreateExtractElement(Vec, Elt, "tmp")); |
| 311 | } |
| 312 | |
| 313 | // If the source and destination have the same number of elements, use a |
| 314 | // vector shuffle instead of insert/extracts. |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 315 | unsigned NumResultElts = ExprVT->getNumElements(); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 316 | unsigned NumSourceElts = |
| 317 | cast<llvm::VectorType>(Vec->getType())->getNumElements(); |
| 318 | |
| 319 | if (NumResultElts == NumSourceElts) { |
| 320 | llvm::SmallVector<llvm::Constant*, 4> Mask; |
| 321 | for (unsigned i = 0; i != NumResultElts; ++i) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 322 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 323 | Mask.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx)); |
| 324 | } |
| 325 | |
| 326 | llvm::Value *MaskV = llvm::ConstantVector::get(&Mask[0], Mask.size()); |
| 327 | Vec = Builder.CreateShuffleVector(Vec, |
| 328 | llvm::UndefValue::get(Vec->getType()), |
| 329 | MaskV, "tmp"); |
| 330 | return RValue::get(Vec); |
| 331 | } |
| 332 | |
| 333 | // Start out with an undef of the result type. |
| 334 | llvm::Value *Result = llvm::UndefValue::get(ConvertType(ExprType)); |
| 335 | |
| 336 | // Extract/Insert each element of the result. |
| 337 | for (unsigned i = 0; i != NumResultElts; ++i) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 338 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 339 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx); |
| 340 | Elt = Builder.CreateExtractElement(Vec, Elt, "tmp"); |
| 341 | |
| 342 | llvm::Value *OutIdx = llvm::ConstantInt::get(llvm::Type::Int32Ty, i); |
| 343 | Result = Builder.CreateInsertElement(Result, Elt, OutIdx, "tmp"); |
| 344 | } |
| 345 | |
| 346 | return RValue::get(Result); |
| 347 | } |
| 348 | |
| 349 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 350 | |
| 351 | /// EmitStoreThroughLValue - Store the specified rvalue into the specified |
| 352 | /// lvalue, where both are guaranteed to the have the same type, and that type |
| 353 | /// is 'Ty'. |
| 354 | void CodeGenFunction::EmitStoreThroughLValue(RValue Src, LValue Dst, |
| 355 | QualType Ty) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 356 | if (!Dst.isSimple()) { |
| 357 | if (Dst.isVectorElt()) { |
| 358 | // Read/modify/write the vector, inserting the new element. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 359 | llvm::Value *Vec = Builder.CreateLoad(Dst.getVectorAddr(), |
| 360 | Dst.isVolatileQualified(), "tmp"); |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 361 | Vec = Builder.CreateInsertElement(Vec, Src.getScalarVal(), |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 362 | Dst.getVectorIdx(), "vecins"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 363 | Builder.CreateStore(Vec, Dst.getVectorAddr(),Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 364 | return; |
| 365 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 366 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 367 | // If this is an update of extended vector elements, insert them as |
| 368 | // appropriate. |
| 369 | if (Dst.isExtVectorElt()) |
| 370 | return EmitStoreThroughExtVectorComponentLValue(Src, Dst, Ty); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 371 | |
| 372 | if (Dst.isBitfield()) |
| 373 | return EmitStoreThroughBitfieldLValue(Src, Dst, Ty); |
| 374 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 375 | if (Dst.isPropertyRef()) |
| 376 | return EmitStoreThroughPropertyRefLValue(Src, Dst, Ty); |
| 377 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 378 | if (Dst.isKVCRef()) |
| 379 | return EmitStoreThroughKVCRefLValue(Src, Dst, Ty); |
| 380 | |
Lauro Ramos Venancio | 6553982 | 2008-01-22 22:38:35 +0000 | [diff] [blame] | 381 | assert(0 && "Unknown LValue type"); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 382 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 383 | |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 384 | if (Dst.isObjCWeak()) { |
| 385 | // load of a __weak object. |
| 386 | llvm::Value *LvalueDst = Dst.getAddress(); |
| 387 | llvm::Value *src = Src.getScalarVal(); |
| 388 | CGM.getObjCRuntime().EmitObjCWeakAssign(*this, src, LvalueDst); |
| 389 | return; |
| 390 | } |
| 391 | |
| 392 | if (Dst.isObjCStrong()) { |
| 393 | // load of a __strong object. |
| 394 | llvm::Value *LvalueDst = Dst.getAddress(); |
| 395 | llvm::Value *src = Src.getScalarVal(); |
Fariborz Jahanian | d1cc804 | 2008-11-20 20:53:20 +0000 | [diff] [blame] | 396 | if (Dst.isObjCIvar()) |
| 397 | CGM.getObjCRuntime().EmitObjCIvarAssign(*this, src, LvalueDst); |
| 398 | else |
| 399 | CGM.getObjCRuntime().EmitObjCGlobalAssign(*this, src, LvalueDst); |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 400 | return; |
| 401 | } |
| 402 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 403 | llvm::Value *DstAddr = Dst.getAddress(); |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 404 | assert(Src.isScalar() && "Can't emit an agg store with this method"); |
| 405 | // FIXME: Handle volatility etc. |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 406 | const llvm::Type *SrcTy = Src.getScalarVal()->getType(); |
Christopher Lamb | ddc23f3 | 2007-12-17 01:11:20 +0000 | [diff] [blame] | 407 | const llvm::PointerType *DstPtr = cast<llvm::PointerType>(DstAddr->getType()); |
| 408 | const llvm::Type *AddrTy = DstPtr->getElementType(); |
| 409 | unsigned AS = DstPtr->getAddressSpace(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 410 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 411 | if (AddrTy != SrcTy) |
Christopher Lamb | ddc23f3 | 2007-12-17 01:11:20 +0000 | [diff] [blame] | 412 | DstAddr = Builder.CreateBitCast(DstAddr, |
| 413 | llvm::PointerType::get(SrcTy, AS), |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 414 | "storetmp"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 415 | Builder.CreateStore(Src.getScalarVal(), DstAddr, Dst.isVolatileQualified()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 416 | } |
| 417 | |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 418 | void CodeGenFunction::EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 419 | QualType Ty, |
| 420 | llvm::Value **Result) { |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 421 | unsigned StartBit = Dst.getBitfieldStartBit(); |
| 422 | unsigned BitfieldSize = Dst.getBitfieldSize(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 423 | llvm::Value *Ptr = Dst.getBitfieldAddr(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 424 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 425 | const llvm::Type *EltTy = |
| 426 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
| 427 | unsigned EltTySize = CGM.getTargetData().getTypeSizeInBits(EltTy); |
| 428 | |
| 429 | // Get the new value, cast to the appropriate type and masked to |
| 430 | // exactly the size of the bit-field. |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 431 | llvm::Value *SrcVal = Src.getScalarVal(); |
| 432 | llvm::Value *NewVal = Builder.CreateIntCast(SrcVal, EltTy, false, "tmp"); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 433 | llvm::Constant *Mask = |
| 434 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, BitfieldSize)); |
| 435 | NewVal = Builder.CreateAnd(NewVal, Mask, "bf.value"); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 436 | |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 437 | // Return the new value of the bit-field, if requested. |
| 438 | if (Result) { |
| 439 | // Cast back to the proper type for result. |
| 440 | const llvm::Type *SrcTy = SrcVal->getType(); |
| 441 | llvm::Value *SrcTrunc = Builder.CreateIntCast(NewVal, SrcTy, false, |
| 442 | "bf.reload.val"); |
| 443 | |
| 444 | // Sign extend if necessary. |
| 445 | if (Dst.isBitfieldSigned()) { |
| 446 | unsigned SrcTySize = CGM.getTargetData().getTypeSizeInBits(SrcTy); |
| 447 | llvm::Value *ExtraBits = llvm::ConstantInt::get(SrcTy, |
| 448 | SrcTySize - BitfieldSize); |
| 449 | SrcTrunc = Builder.CreateAShr(Builder.CreateShl(SrcTrunc, ExtraBits), |
| 450 | ExtraBits, "bf.reload.sext"); |
| 451 | } |
| 452 | |
| 453 | *Result = SrcTrunc; |
| 454 | } |
| 455 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 456 | // In some cases the bitfield may straddle two memory locations. |
| 457 | // Emit the low part first and check to see if the high needs to be |
| 458 | // done. |
| 459 | unsigned LowBits = std::min(BitfieldSize, EltTySize - StartBit); |
| 460 | llvm::Value *LowVal = Builder.CreateLoad(Ptr, Dst.isVolatileQualified(), |
| 461 | "bf.prev.low"); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 462 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 463 | // Compute the mask for zero-ing the low part of this bitfield. |
| 464 | llvm::Constant *InvMask = |
| 465 | llvm::ConstantInt::get(~llvm::APInt::getBitsSet(EltTySize, StartBit, |
| 466 | StartBit + LowBits)); |
| 467 | |
| 468 | // Compute the new low part as |
| 469 | // LowVal = (LowVal & InvMask) | (NewVal << StartBit), |
| 470 | // with the shift of NewVal implicitly stripping the high bits. |
| 471 | llvm::Value *NewLowVal = |
| 472 | Builder.CreateShl(NewVal, llvm::ConstantInt::get(EltTy, StartBit), |
| 473 | "bf.value.lo"); |
| 474 | LowVal = Builder.CreateAnd(LowVal, InvMask, "bf.prev.lo.cleared"); |
| 475 | LowVal = Builder.CreateOr(LowVal, NewLowVal, "bf.new.lo"); |
| 476 | |
| 477 | // Write back. |
| 478 | Builder.CreateStore(LowVal, Ptr, Dst.isVolatileQualified()); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 479 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 480 | // If the low part doesn't cover the bitfield emit a high part. |
| 481 | if (LowBits < BitfieldSize) { |
| 482 | unsigned HighBits = BitfieldSize - LowBits; |
| 483 | llvm::Value *HighPtr = |
| 484 | Builder.CreateGEP(Ptr, llvm::ConstantInt::get(llvm::Type::Int32Ty, 1), |
| 485 | "bf.ptr.hi"); |
| 486 | llvm::Value *HighVal = Builder.CreateLoad(HighPtr, |
| 487 | Dst.isVolatileQualified(), |
| 488 | "bf.prev.hi"); |
| 489 | |
| 490 | // Compute the mask for zero-ing the high part of this bitfield. |
| 491 | llvm::Constant *InvMask = |
| 492 | llvm::ConstantInt::get(~llvm::APInt::getLowBitsSet(EltTySize, HighBits)); |
| 493 | |
| 494 | // Compute the new high part as |
| 495 | // HighVal = (HighVal & InvMask) | (NewVal lshr LowBits), |
| 496 | // where the high bits of NewVal have already been cleared and the |
| 497 | // shift stripping the low bits. |
| 498 | llvm::Value *NewHighVal = |
| 499 | Builder.CreateLShr(NewVal, llvm::ConstantInt::get(EltTy, LowBits), |
| 500 | "bf.value.high"); |
| 501 | HighVal = Builder.CreateAnd(HighVal, InvMask, "bf.prev.hi.cleared"); |
| 502 | HighVal = Builder.CreateOr(HighVal, NewHighVal, "bf.new.hi"); |
| 503 | |
| 504 | // Write back. |
| 505 | Builder.CreateStore(HighVal, HighPtr, Dst.isVolatileQualified()); |
| 506 | } |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 507 | } |
| 508 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 509 | void CodeGenFunction::EmitStoreThroughPropertyRefLValue(RValue Src, |
| 510 | LValue Dst, |
| 511 | QualType Ty) { |
| 512 | EmitObjCPropertySet(Dst.getPropertyRefExpr(), Src); |
| 513 | } |
| 514 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 515 | void CodeGenFunction::EmitStoreThroughKVCRefLValue(RValue Src, |
| 516 | LValue Dst, |
| 517 | QualType Ty) { |
| 518 | EmitObjCPropertySet(Dst.getKVCRefExpr(), Src); |
| 519 | } |
| 520 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 521 | void CodeGenFunction::EmitStoreThroughExtVectorComponentLValue(RValue Src, |
| 522 | LValue Dst, |
| 523 | QualType Ty) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 524 | // This access turns into a read/modify/write of the vector. Load the input |
| 525 | // value now. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 526 | llvm::Value *Vec = Builder.CreateLoad(Dst.getExtVectorAddr(), |
| 527 | Dst.isVolatileQualified(), "tmp"); |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 528 | const llvm::Constant *Elts = Dst.getExtVectorElts(); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 529 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 530 | llvm::Value *SrcVal = Src.getScalarVal(); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 531 | |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 532 | if (const VectorType *VTy = Ty->getAsVectorType()) { |
| 533 | unsigned NumSrcElts = VTy->getNumElements(); |
| 534 | |
| 535 | // Extract/Insert each element. |
| 536 | for (unsigned i = 0; i != NumSrcElts; ++i) { |
| 537 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, i); |
| 538 | Elt = Builder.CreateExtractElement(SrcVal, Elt, "tmp"); |
| 539 | |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 540 | unsigned Idx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 541 | llvm::Value *OutIdx = llvm::ConstantInt::get(llvm::Type::Int32Ty, Idx); |
| 542 | Vec = Builder.CreateInsertElement(Vec, Elt, OutIdx, "tmp"); |
| 543 | } |
| 544 | } else { |
| 545 | // 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] | 546 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 547 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx); |
| 548 | Vec = Builder.CreateInsertElement(Vec, SrcVal, Elt, "tmp"); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 549 | } |
| 550 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 551 | Builder.CreateStore(Vec, Dst.getExtVectorAddr(), Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 552 | } |
| 553 | |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 554 | /// SetVarDeclObjCAttribute - Set __weak/__strong attributes into the LValue |
| 555 | /// object. |
Fariborz Jahanian | d1cc804 | 2008-11-20 20:53:20 +0000 | [diff] [blame] | 556 | static void SetVarDeclObjCAttribute(ASTContext &Ctx, const Decl *VD, |
Fariborz Jahanian | 80b0b42 | 2008-11-20 18:10:58 +0000 | [diff] [blame] | 557 | const QualType &Ty, LValue &LV) |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 558 | { |
| 559 | if (const ObjCGCAttr *A = VD->getAttr<ObjCGCAttr>()) { |
| 560 | ObjCGCAttr::GCAttrTypes attrType = A->getType(); |
| 561 | LValue::SetObjCType(attrType == ObjCGCAttr::Weak, |
| 562 | attrType == ObjCGCAttr::Strong, LV); |
| 563 | } |
Fariborz Jahanian | 80b0b42 | 2008-11-20 18:10:58 +0000 | [diff] [blame] | 564 | else if (Ctx.getLangOptions().ObjC1 && |
| 565 | Ctx.getLangOptions().getGCMode() != LangOptions::NonGC) { |
| 566 | // Default behavious under objective-c's gc is for objective-c pointers |
| 567 | // be treated as though they were declared as __strong. |
| 568 | if (Ctx.isObjCObjectPointerType(Ty)) |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 569 | LValue::SetObjCType(false, true, LV); |
| 570 | } |
| 571 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 572 | |
| 573 | LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 574 | const VarDecl *VD = dyn_cast<VarDecl>(E->getDecl()); |
| 575 | |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 576 | if (VD && (VD->isBlockVarDecl() || isa<ParmVarDecl>(VD) || |
| 577 | isa<ImplicitParamDecl>(VD))) { |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 578 | LValue LV; |
| 579 | if (VD->getStorageClass() == VarDecl::Extern) { |
| 580 | LV = LValue::MakeAddr(CGM.GetAddrOfGlobalVar(VD), |
| 581 | E->getType().getCVRQualifiers()); |
| 582 | } |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 583 | else { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 584 | llvm::Value *V = LocalDeclMap[VD]; |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 585 | assert(V && "BlockVarDecl not entered in LocalDeclMap?"); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 586 | LV = LValue::MakeAddr(V, E->getType().getCVRQualifiers()); |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 587 | } |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 588 | if (VD->isBlockVarDecl() && |
| 589 | (VD->getStorageClass() == VarDecl::Static || |
| 590 | VD->getStorageClass() == VarDecl::Extern)) |
Fariborz Jahanian | 80b0b42 | 2008-11-20 18:10:58 +0000 | [diff] [blame] | 591 | SetVarDeclObjCAttribute(getContext(), VD, E->getType(), LV); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 592 | return LV; |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 593 | } else if (VD && VD->isFileVarDecl()) { |
Fariborz Jahanian | 6d657c4 | 2008-11-18 20:18:11 +0000 | [diff] [blame] | 594 | LValue LV = LValue::MakeAddr(CGM.GetAddrOfGlobalVar(VD), |
| 595 | E->getType().getCVRQualifiers()); |
Fariborz Jahanian | 80b0b42 | 2008-11-20 18:10:58 +0000 | [diff] [blame] | 596 | SetVarDeclObjCAttribute(getContext(), VD, E->getType(), LV); |
Fariborz Jahanian | 6d657c4 | 2008-11-18 20:18:11 +0000 | [diff] [blame] | 597 | return LV; |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 598 | } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(E->getDecl())) { |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 599 | return LValue::MakeAddr(CGM.GetAddrOfFunction(FD), |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 600 | E->getType().getCVRQualifiers()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 601 | } |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 602 | else if (const ImplicitParamDecl *IPD = |
| 603 | dyn_cast<ImplicitParamDecl>(E->getDecl())) { |
| 604 | llvm::Value *V = LocalDeclMap[IPD]; |
| 605 | assert(V && "BlockVarDecl not entered in LocalDeclMap?"); |
| 606 | return LValue::MakeAddr(V, E->getType().getCVRQualifiers()); |
| 607 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 608 | assert(0 && "Unimp declref"); |
Chris Lattner | b1776cb | 2007-09-16 19:23:47 +0000 | [diff] [blame] | 609 | //an invalid LValue, but the assert will |
| 610 | //ensure that this point is never reached. |
| 611 | return LValue(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | LValue CodeGenFunction::EmitUnaryOpLValue(const UnaryOperator *E) { |
| 615 | // __extension__ doesn't affect lvalue-ness. |
| 616 | if (E->getOpcode() == UnaryOperator::Extension) |
| 617 | return EmitLValue(E->getSubExpr()); |
| 618 | |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 619 | QualType ExprTy = getContext().getCanonicalType(E->getSubExpr()->getType()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 620 | switch (E->getOpcode()) { |
| 621 | default: assert(0 && "Unknown unary operator lvalue!"); |
| 622 | case UnaryOperator::Deref: |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 623 | return LValue::MakeAddr(EmitScalarExpr(E->getSubExpr()), |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 624 | ExprTy->getAsPointerType()->getPointeeType() |
| 625 | .getCVRQualifiers()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 626 | case UnaryOperator::Real: |
| 627 | case UnaryOperator::Imag: |
| 628 | LValue LV = EmitLValue(E->getSubExpr()); |
Chris Lattner | 36b6a0a | 2008-03-19 05:19:41 +0000 | [diff] [blame] | 629 | unsigned Idx = E->getOpcode() == UnaryOperator::Imag; |
| 630 | return LValue::MakeAddr(Builder.CreateStructGEP(LV.getAddress(), |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 631 | Idx, "idx"), |
| 632 | ExprTy.getCVRQualifiers()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 633 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 634 | } |
| 635 | |
| 636 | LValue CodeGenFunction::EmitStringLiteralLValue(const StringLiteral *E) { |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 637 | return LValue::MakeAddr(CGM.GetAddrOfConstantStringFromLiteral(E), 0); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 638 | } |
| 639 | |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 640 | LValue CodeGenFunction::EmitPredefinedFunctionName(unsigned Type) { |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 641 | std::string GlobalVarName; |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 642 | |
| 643 | switch (Type) { |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 644 | default: |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 645 | assert(0 && "Invalid type"); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 646 | case PredefinedExpr::Func: |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 647 | GlobalVarName = "__func__."; |
| 648 | break; |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 649 | case PredefinedExpr::Function: |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 650 | GlobalVarName = "__FUNCTION__."; |
| 651 | break; |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 652 | case PredefinedExpr::PrettyFunction: |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 653 | // FIXME:: Demangle C++ method names |
| 654 | GlobalVarName = "__PRETTY_FUNCTION__."; |
| 655 | break; |
| 656 | } |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 657 | |
| 658 | std::string FunctionName; |
| 659 | if(const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurFuncDecl)) { |
Chris Lattner | d9d22dd | 2008-11-24 05:29:24 +0000 | [diff] [blame] | 660 | FunctionName = FD->getNameAsString(); |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 661 | } else { |
| 662 | // Just get the mangled name. |
| 663 | FunctionName = CurFn->getName(); |
| 664 | } |
| 665 | |
Chris Lattner | c8aa5f1 | 2008-04-04 04:07:35 +0000 | [diff] [blame] | 666 | GlobalVarName += FunctionName; |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 667 | llvm::Constant *C = |
| 668 | CGM.GetAddrOfConstantCString(FunctionName, GlobalVarName.c_str()); |
| 669 | return LValue::MakeAddr(C, 0); |
| 670 | } |
| 671 | |
| 672 | LValue CodeGenFunction::EmitPredefinedLValue(const PredefinedExpr *E) { |
| 673 | switch (E->getIdentType()) { |
| 674 | default: |
| 675 | return EmitUnsupportedLValue(E, "predefined expression"); |
| 676 | case PredefinedExpr::Func: |
| 677 | case PredefinedExpr::Function: |
| 678 | case PredefinedExpr::PrettyFunction: |
| 679 | return EmitPredefinedFunctionName(E->getIdentType()); |
| 680 | } |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 681 | } |
| 682 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 683 | LValue CodeGenFunction::EmitArraySubscriptExpr(const ArraySubscriptExpr *E) { |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 684 | // 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] | 685 | llvm::Value *Idx = EmitScalarExpr(E->getIdx()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 686 | |
| 687 | // If the base is a vector type, then we are forming a vector element lvalue |
| 688 | // with this subscript. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 689 | if (E->getBase()->getType()->isVectorType()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 690 | // Emit the vector as an lvalue to get its address. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 691 | LValue LHS = EmitLValue(E->getBase()); |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 692 | assert(LHS.isSimple() && "Can only subscript lvalue vectors here!"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 693 | // FIXME: This should properly sign/zero/extend or truncate Idx to i32. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 694 | return LValue::MakeVectorElt(LHS.getAddress(), Idx, |
| 695 | E->getBase()->getType().getCVRQualifiers()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 696 | } |
| 697 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 698 | // 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] | 699 | llvm::Value *Base = EmitScalarExpr(E->getBase()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 700 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 701 | // Extend or truncate the index type to 32 or 64-bits. |
Chris Lattner | d4f0802 | 2007-08-08 17:43:05 +0000 | [diff] [blame] | 702 | QualType IdxTy = E->getIdx()->getType(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 703 | bool IdxSigned = IdxTy->isSignedIntegerType(); |
| 704 | unsigned IdxBitwidth = cast<llvm::IntegerType>(Idx->getType())->getBitWidth(); |
| 705 | if (IdxBitwidth != LLVMPointerWidth) |
| 706 | Idx = Builder.CreateIntCast(Idx, llvm::IntegerType::get(LLVMPointerWidth), |
| 707 | IdxSigned, "idxprom"); |
| 708 | |
| 709 | // We know that the pointer points to a type of the correct size, unless the |
| 710 | // size is a VLA. |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 711 | if (const VariableArrayType *VAT = |
| 712 | getContext().getAsVariableArrayType(E->getType())) { |
| 713 | llvm::Value *VLASize = VLASizeMap[VAT]; |
| 714 | |
| 715 | Idx = Builder.CreateMul(Idx, VLASize); |
| 716 | |
Anders Carlsson | 6183a99 | 2008-12-21 03:44:36 +0000 | [diff] [blame] | 717 | QualType BaseType = getContext().getBaseElementType(VAT); |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 718 | |
| 719 | uint64_t BaseTypeSize = getContext().getTypeSize(BaseType) / 8; |
| 720 | Idx = Builder.CreateUDiv(Idx, |
| 721 | llvm::ConstantInt::get(Idx->getType(), |
| 722 | BaseTypeSize)); |
| 723 | } |
| 724 | |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 725 | QualType ExprTy = getContext().getCanonicalType(E->getBase()->getType()); |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 726 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 727 | return LValue::MakeAddr(Builder.CreateGEP(Base, Idx, "arrayidx"), |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 728 | ExprTy->getAsPointerType()->getPointeeType() |
| 729 | .getCVRQualifiers()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 730 | } |
| 731 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 732 | static |
| 733 | llvm::Constant *GenerateConstantVector(llvm::SmallVector<unsigned, 4> &Elts) { |
| 734 | llvm::SmallVector<llvm::Constant *, 4> CElts; |
| 735 | |
| 736 | for (unsigned i = 0, e = Elts.size(); i != e; ++i) |
| 737 | CElts.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, Elts[i])); |
| 738 | |
| 739 | return llvm::ConstantVector::get(&CElts[0], CElts.size()); |
| 740 | } |
| 741 | |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 742 | LValue CodeGenFunction:: |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 743 | EmitExtVectorElementExpr(const ExtVectorElementExpr *E) { |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 744 | // Emit the base vector as an l-value. |
| 745 | LValue Base = EmitLValue(E->getBase()); |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 746 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 747 | // Encode the element access list into a vector of unsigned indices. |
| 748 | llvm::SmallVector<unsigned, 4> Indices; |
| 749 | E->getEncodedElementAccess(Indices); |
| 750 | |
| 751 | if (Base.isSimple()) { |
| 752 | llvm::Constant *CV = GenerateConstantVector(Indices); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 753 | return LValue::MakeExtVectorElt(Base.getAddress(), CV, |
| 754 | E->getBase()->getType().getCVRQualifiers()); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 755 | } |
| 756 | assert(Base.isExtVectorElt() && "Can only subscript lvalue vec elts here!"); |
| 757 | |
| 758 | llvm::Constant *BaseElts = Base.getExtVectorElts(); |
| 759 | llvm::SmallVector<llvm::Constant *, 4> CElts; |
| 760 | |
| 761 | for (unsigned i = 0, e = Indices.size(); i != e; ++i) { |
| 762 | if (isa<llvm::ConstantAggregateZero>(BaseElts)) |
| 763 | CElts.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, 0)); |
| 764 | else |
| 765 | CElts.push_back(BaseElts->getOperand(Indices[i])); |
| 766 | } |
| 767 | llvm::Constant *CV = llvm::ConstantVector::get(&CElts[0], CElts.size()); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 768 | return LValue::MakeExtVectorElt(Base.getExtVectorAddr(), CV, |
| 769 | E->getBase()->getType().getCVRQualifiers()); |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 770 | } |
| 771 | |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 772 | LValue CodeGenFunction::EmitMemberExpr(const MemberExpr *E) { |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 773 | bool isUnion = false; |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 774 | bool isIvar = false; |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 775 | Expr *BaseExpr = E->getBase(); |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 776 | llvm::Value *BaseValue = NULL; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 777 | unsigned CVRQualifiers=0; |
| 778 | |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 779 | // 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] | 780 | if (E->isArrow()) { |
Devang Patel | 0a96118 | 2007-10-26 18:15:21 +0000 | [diff] [blame] | 781 | BaseValue = EmitScalarExpr(BaseExpr); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 782 | const PointerType *PTy = |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 783 | cast<PointerType>(getContext().getCanonicalType(BaseExpr->getType())); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 784 | if (PTy->getPointeeType()->isUnionType()) |
| 785 | isUnion = true; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 786 | CVRQualifiers = PTy->getPointeeType().getCVRQualifiers(); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 787 | } |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 788 | else { |
| 789 | LValue BaseLV = EmitLValue(BaseExpr); |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 790 | if (BaseLV.isObjCIvar()) |
| 791 | isIvar = true; |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 792 | // FIXME: this isn't right for bitfields. |
| 793 | BaseValue = BaseLV.getAddress(); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 794 | if (BaseExpr->getType()->isUnionType()) |
| 795 | isUnion = true; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 796 | CVRQualifiers = BaseExpr->getType().getCVRQualifiers(); |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 797 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 798 | |
Douglas Gregor | 86f1940 | 2008-12-20 23:49:58 +0000 | [diff] [blame] | 799 | FieldDecl *Field = dyn_cast<FieldDecl>(E->getMemberDecl()); |
| 800 | // FIXME: Handle non-field member expressions |
| 801 | assert(Field && "No code generation for non-field member references"); |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 802 | LValue MemExpLV = EmitLValueForField(BaseValue, Field, isUnion, CVRQualifiers); |
| 803 | LValue::SetObjCIvar(MemExpLV, isIvar); |
| 804 | return MemExpLV; |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 805 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 806 | |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 807 | LValue CodeGenFunction::EmitLValueForBitfield(llvm::Value* BaseValue, |
| 808 | FieldDecl* Field, |
| 809 | unsigned CVRQualifiers, |
| 810 | unsigned idx) { |
| 811 | // FIXME: CodeGenTypes should expose a method to get the appropriate |
| 812 | // type for FieldTy (the appropriate type is ABI-dependent). |
| 813 | const llvm::Type *FieldTy = CGM.getTypes().ConvertTypeForMem(Field->getType()); |
| 814 | const llvm::PointerType *BaseTy = |
| 815 | cast<llvm::PointerType>(BaseValue->getType()); |
| 816 | unsigned AS = BaseTy->getAddressSpace(); |
| 817 | BaseValue = Builder.CreateBitCast(BaseValue, |
| 818 | llvm::PointerType::get(FieldTy, AS), |
| 819 | "tmp"); |
| 820 | llvm::Value *V = Builder.CreateGEP(BaseValue, |
| 821 | llvm::ConstantInt::get(llvm::Type::Int32Ty, idx), |
| 822 | "tmp"); |
| 823 | |
| 824 | CodeGenTypes::BitFieldInfo bitFieldInfo = |
| 825 | CGM.getTypes().getBitFieldInfo(Field); |
| 826 | return LValue::MakeBitfield(V, bitFieldInfo.Begin, bitFieldInfo.Size, |
| 827 | Field->getType()->isSignedIntegerType(), |
| 828 | Field->getType().getCVRQualifiers()|CVRQualifiers); |
| 829 | } |
| 830 | |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 831 | LValue CodeGenFunction::EmitLValueForField(llvm::Value* BaseValue, |
| 832 | FieldDecl* Field, |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 833 | bool isUnion, |
| 834 | unsigned CVRQualifiers) |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 835 | { |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 836 | unsigned idx = CGM.getTypes().getLLVMFieldNo(Field); |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 837 | |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 838 | if (Field->isBitField()) |
| 839 | return EmitLValueForBitfield(BaseValue, Field, CVRQualifiers, idx); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 840 | |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 841 | llvm::Value *V = Builder.CreateStructGEP(BaseValue, idx, "tmp"); |
Eli Friedman | 1e86b34 | 2008-05-29 11:33:25 +0000 | [diff] [blame] | 842 | |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 843 | // Match union field type. |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 844 | if (isUnion) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 845 | const llvm::Type *FieldTy = |
| 846 | CGM.getTypes().ConvertTypeForMem(Field->getType()); |
Devang Patel | e9b8c0a | 2007-10-30 20:59:40 +0000 | [diff] [blame] | 847 | const llvm::PointerType * BaseTy = |
| 848 | cast<llvm::PointerType>(BaseValue->getType()); |
Eli Friedman | 788d571 | 2008-05-21 13:24:44 +0000 | [diff] [blame] | 849 | unsigned AS = BaseTy->getAddressSpace(); |
| 850 | V = Builder.CreateBitCast(V, |
| 851 | llvm::PointerType::get(FieldTy, AS), |
| 852 | "tmp"); |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 853 | } |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 854 | |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 855 | LValue LV = |
| 856 | LValue::MakeAddr(V, |
| 857 | Field->getType().getCVRQualifiers()|CVRQualifiers); |
| 858 | if (const ObjCGCAttr *A = Field->getAttr<ObjCGCAttr>()) { |
| 859 | ObjCGCAttr::GCAttrTypes attrType = A->getType(); |
| 860 | // __weak attribute on a field is ignored. |
| 861 | LValue::SetObjCType(false, attrType == ObjCGCAttr::Strong, LV); |
| 862 | } |
| 863 | else if (CGM.getLangOptions().ObjC1 && |
| 864 | CGM.getLangOptions().getGCMode() != LangOptions::NonGC) { |
| 865 | QualType ExprTy = Field->getType(); |
| 866 | if (getContext().isObjCObjectPointerType(ExprTy)) |
| 867 | LValue::SetObjCType(false, true, LV); |
| 868 | } |
| 869 | return LV; |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 870 | } |
| 871 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 872 | LValue CodeGenFunction::EmitCompoundLiteralLValue(const CompoundLiteralExpr* E) |
| 873 | { |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 874 | const llvm::Type *LTy = ConvertType(E->getType()); |
| 875 | llvm::Value *DeclPtr = CreateTempAlloca(LTy, ".compoundliteral"); |
| 876 | |
| 877 | const Expr* InitExpr = E->getInitializer(); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 878 | LValue Result = LValue::MakeAddr(DeclPtr, E->getType().getCVRQualifiers()); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 879 | |
| 880 | if (E->getType()->isComplexType()) { |
| 881 | EmitComplexExprIntoAddr(InitExpr, DeclPtr, false); |
| 882 | } else if (hasAggregateLLVMType(E->getType())) { |
| 883 | EmitAnyExpr(InitExpr, DeclPtr, false); |
| 884 | } else { |
| 885 | EmitStoreThroughLValue(EmitAnyExpr(InitExpr), Result, E->getType()); |
| 886 | } |
| 887 | |
| 888 | return Result; |
| 889 | } |
| 890 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 891 | //===--------------------------------------------------------------------===// |
| 892 | // Expression Emission |
| 893 | //===--------------------------------------------------------------------===// |
| 894 | |
Chris Lattner | 7016a70 | 2007-08-20 22:37:10 +0000 | [diff] [blame] | 895 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 896 | RValue CodeGenFunction::EmitCallExpr(const CallExpr *E) { |
Anders Carlsson | 022012e | 2007-08-20 18:05:56 +0000 | [diff] [blame] | 897 | if (const ImplicitCastExpr *IcExpr = |
| 898 | dyn_cast<const ImplicitCastExpr>(E->getCallee())) |
| 899 | if (const DeclRefExpr *DRExpr = |
| 900 | dyn_cast<const DeclRefExpr>(IcExpr->getSubExpr())) |
| 901 | if (const FunctionDecl *FDecl = |
| 902 | dyn_cast<const FunctionDecl>(DRExpr->getDecl())) |
| 903 | if (unsigned builtinID = FDecl->getIdentifier()->getBuiltinID()) |
| 904 | return EmitBuiltinExpr(builtinID, E); |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 905 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 906 | llvm::Value *Callee = EmitScalarExpr(E->getCallee()); |
Eli Friedman | 5193b8a | 2008-01-30 01:32:06 +0000 | [diff] [blame] | 907 | return EmitCallExpr(Callee, E->getCallee()->getType(), |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 908 | E->arg_begin(), E->arg_end()); |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 909 | } |
| 910 | |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 911 | RValue CodeGenFunction::EmitCallExpr(Expr *FnExpr, |
| 912 | CallExpr::const_arg_iterator ArgBeg, |
| 913 | CallExpr::const_arg_iterator ArgEnd) { |
| 914 | |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 915 | llvm::Value *Callee = EmitScalarExpr(FnExpr); |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 916 | return EmitCallExpr(Callee, FnExpr->getType(), ArgBeg, ArgEnd); |
Chris Lattner | c5e940f | 2007-08-31 04:44:06 +0000 | [diff] [blame] | 917 | } |
| 918 | |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 919 | LValue CodeGenFunction::EmitBinaryOperatorLValue(const BinaryOperator *E) { |
| 920 | // Can only get l-value for binary operator expressions which are a |
| 921 | // simple assignment of aggregate type. |
| 922 | if (E->getOpcode() != BinaryOperator::Assign) |
| 923 | return EmitUnsupportedLValue(E, "binary l-value expression"); |
| 924 | |
| 925 | llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType())); |
| 926 | EmitAggExpr(E, Temp, false); |
| 927 | // FIXME: Are these qualifiers correct? |
| 928 | return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers()); |
| 929 | } |
| 930 | |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 931 | LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E) { |
| 932 | // Can only get l-value for call expression returning aggregate type |
| 933 | RValue RV = EmitCallExpr(E); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 934 | // FIXME: can this be volatile? |
| 935 | return LValue::MakeAddr(RV.getAggregateAddr(), |
| 936 | E->getType().getCVRQualifiers()); |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 937 | } |
| 938 | |
Argyrios Kyrtzidis | e3a09e6 | 2008-09-10 02:36:38 +0000 | [diff] [blame] | 939 | LValue |
| 940 | CodeGenFunction::EmitCXXConditionDeclLValue(const CXXConditionDeclExpr *E) { |
| 941 | EmitLocalBlockVarDecl(*E->getVarDecl()); |
| 942 | return EmitDeclRefLValue(E); |
| 943 | } |
| 944 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 945 | LValue CodeGenFunction::EmitObjCMessageExprLValue(const ObjCMessageExpr *E) { |
| 946 | // Can only get l-value for message expression returning aggregate type |
| 947 | RValue RV = EmitObjCMessageExpr(E); |
| 948 | // FIXME: can this be volatile? |
| 949 | return LValue::MakeAddr(RV.getAggregateAddr(), |
| 950 | E->getType().getCVRQualifiers()); |
| 951 | } |
| 952 | |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 953 | llvm::Value *CodeGenFunction::EmitIvarOffset(ObjCInterfaceDecl *Interface, |
| 954 | const ObjCIvarDecl *Ivar) { |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 955 | // Objective-C objects are traditionally C structures with their layout |
| 956 | // defined at compile-time. In some implementations, their layout is not |
| 957 | // defined until run time in order to allow instance variables to be added to |
| 958 | // a class without recompiling all of the subclasses. If this is the case |
| 959 | // then the CGObjCRuntime subclass must return true to LateBoundIvars and |
| 960 | // implement the lookup itself. |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 961 | if (CGM.getObjCRuntime().LateBoundIVars()) |
| 962 | assert(0 && "late-bound ivars are unsupported"); |
Chris Lattner | c8aa5f1 | 2008-04-04 04:07:35 +0000 | [diff] [blame] | 963 | |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 964 | const llvm::Type *InterfaceLTy = |
| 965 | CGM.getTypes().ConvertType(getContext().getObjCInterfaceType(Interface)); |
| 966 | const llvm::StructLayout *Layout = |
| 967 | CGM.getTargetData().getStructLayout(cast<llvm::StructType>(InterfaceLTy)); |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 968 | FieldDecl *Field = Interface->lookupFieldDeclForIvar(getContext(), Ivar); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 969 | uint64_t Offset = |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 970 | Layout->getElementOffset(CGM.getTypes().getLLVMFieldNo(Field)); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 971 | |
| 972 | return llvm::ConstantInt::get(CGM.getTypes().ConvertType(getContext().LongTy), |
| 973 | Offset); |
| 974 | } |
| 975 | |
| 976 | LValue CodeGenFunction::EmitLValueForIvar(llvm::Value *BaseValue, |
| 977 | const ObjCIvarDecl *Ivar, |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 978 | const FieldDecl *Field, |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 979 | unsigned CVRQualifiers) { |
| 980 | // See comment in EmitIvarOffset. |
| 981 | if (CGM.getObjCRuntime().LateBoundIVars()) |
| 982 | assert(0 && "late-bound ivars are unsupported"); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 983 | // TODO: Add a special case for isa (index 0) |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 984 | unsigned Index = CGM.getTypes().getLLVMFieldNo(Field); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 985 | |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 986 | if (Ivar->isBitField()) { |
| 987 | return EmitLValueForBitfield(BaseValue, const_cast<FieldDecl *>(Field), |
| 988 | CVRQualifiers, Index); |
| 989 | } |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 990 | llvm::Value *V = Builder.CreateStructGEP(BaseValue, Index, "tmp"); |
Fariborz Jahanian | d1cc804 | 2008-11-20 20:53:20 +0000 | [diff] [blame] | 991 | LValue LV = LValue::MakeAddr(V, Ivar->getType().getCVRQualifiers()|CVRQualifiers); |
| 992 | SetVarDeclObjCAttribute(getContext(), Ivar, Ivar->getType(), LV); |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 993 | LValue::SetObjCIvar(LV, true); |
Fariborz Jahanian | d1cc804 | 2008-11-20 20:53:20 +0000 | [diff] [blame] | 994 | return LV; |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 995 | } |
| 996 | |
| 997 | LValue CodeGenFunction::EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E) { |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 998 | // FIXME: A lot of the code below could be shared with EmitMemberExpr. |
| 999 | llvm::Value *BaseValue = 0; |
| 1000 | const Expr *BaseExpr = E->getBase(); |
| 1001 | unsigned CVRQualifiers = 0; |
| 1002 | if (E->isArrow()) { |
| 1003 | BaseValue = EmitScalarExpr(BaseExpr); |
| 1004 | const PointerType *PTy = |
| 1005 | cast<PointerType>(getContext().getCanonicalType(BaseExpr->getType())); |
| 1006 | CVRQualifiers = PTy->getPointeeType().getCVRQualifiers(); |
| 1007 | } else { |
| 1008 | LValue BaseLV = EmitLValue(BaseExpr); |
| 1009 | // FIXME: this isn't right for bitfields. |
| 1010 | BaseValue = BaseLV.getAddress(); |
| 1011 | CVRQualifiers = BaseExpr->getType().getCVRQualifiers(); |
| 1012 | } |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 1013 | |
Fariborz Jahanian | efc4c4b | 2008-12-18 17:29:46 +0000 | [diff] [blame] | 1014 | return EmitLValueForIvar(BaseValue, E->getDecl(), |
| 1015 | getContext().getFieldDecl(E), CVRQualifiers); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 1016 | } |
| 1017 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 1018 | LValue |
| 1019 | CodeGenFunction::EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E) { |
| 1020 | // This is a special l-value that just issues sends when we load or |
| 1021 | // store through it. |
| 1022 | return LValue::MakePropertyRef(E, E->getType().getCVRQualifiers()); |
| 1023 | } |
| 1024 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 1025 | LValue |
| 1026 | CodeGenFunction::EmitObjCKVCRefLValue(const ObjCKVCRefExpr *E) { |
| 1027 | // This is a special l-value that just issues sends when we load or |
| 1028 | // store through it. |
| 1029 | return LValue::MakeKVCRef(E, E->getType().getCVRQualifiers()); |
| 1030 | } |
| 1031 | |
Douglas Gregor | cd9b46e | 2008-11-04 14:56:14 +0000 | [diff] [blame] | 1032 | LValue |
| 1033 | CodeGenFunction::EmitObjCSuperExpr(const ObjCSuperExpr *E) { |
| 1034 | return EmitUnsupportedLValue(E, "use of super"); |
| 1035 | } |
| 1036 | |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 1037 | RValue CodeGenFunction::EmitCallExpr(llvm::Value *Callee, QualType FnType, |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1038 | CallExpr::const_arg_iterator ArgBeg, |
| 1039 | CallExpr::const_arg_iterator ArgEnd) { |
| 1040 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1041 | // The callee type will always be a pointer to function type, get the function |
| 1042 | // type. |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 1043 | FnType = FnType->getAsPointerType()->getPointeeType(); |
Chris Lattner | 05d2fb4 | 2008-07-31 04:58:58 +0000 | [diff] [blame] | 1044 | QualType ResultType = FnType->getAsFunctionType()->getResultType(); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 1045 | |
| 1046 | CallArgList Args; |
| 1047 | for (CallExpr::const_arg_iterator I = ArgBeg; I != ArgEnd; ++I) |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 1048 | Args.push_back(std::make_pair(EmitAnyExprToTemp(*I), |
| 1049 | I->getType())); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 1050 | |
| 1051 | return EmitCall(Callee, ResultType, Args); |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 1052 | } |