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)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 119 | case Expr::DeclRefExprClass: return EmitDeclRefLValue(cast<DeclRefExpr>(E)); |
| 120 | case Expr::ParenExprClass:return EmitLValue(cast<ParenExpr>(E)->getSubExpr()); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 121 | case Expr::PredefinedExprClass: |
| 122 | return EmitPredefinedLValue(cast<PredefinedExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 123 | case Expr::StringLiteralClass: |
| 124 | return EmitStringLiteralLValue(cast<StringLiteral>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 125 | |
Argyrios Kyrtzidis | e3a09e6 | 2008-09-10 02:36:38 +0000 | [diff] [blame] | 126 | case Expr::CXXConditionDeclExprClass: |
| 127 | return EmitCXXConditionDeclLValue(cast<CXXConditionDeclExpr>(E)); |
| 128 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 129 | case Expr::ObjCMessageExprClass: |
| 130 | return EmitObjCMessageExprLValue(cast<ObjCMessageExpr>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 131 | case Expr::ObjCIvarRefExprClass: |
| 132 | return EmitObjCIvarRefLValue(cast<ObjCIvarRefExpr>(E)); |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 133 | case Expr::ObjCPropertyRefExprClass: |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 134 | return EmitObjCPropertyRefLValue(cast<ObjCPropertyRefExpr>(E)); |
Douglas Gregor | cd9b46e | 2008-11-04 14:56:14 +0000 | [diff] [blame] | 135 | case Expr::ObjCSuperExprClass: |
| 136 | return EmitObjCSuperExpr(cast<ObjCSuperExpr>(E)); |
| 137 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 138 | case Expr::UnaryOperatorClass: |
| 139 | return EmitUnaryOpLValue(cast<UnaryOperator>(E)); |
| 140 | case Expr::ArraySubscriptExprClass: |
| 141 | return EmitArraySubscriptExpr(cast<ArraySubscriptExpr>(E)); |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 142 | case Expr::ExtVectorElementExprClass: |
| 143 | return EmitExtVectorElementExpr(cast<ExtVectorElementExpr>(E)); |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 144 | case Expr::MemberExprClass: return EmitMemberExpr(cast<MemberExpr>(E)); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 145 | case Expr::CompoundLiteralExprClass: |
| 146 | return EmitCompoundLiteralLValue(cast<CompoundLiteralExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 147 | } |
| 148 | } |
| 149 | |
| 150 | /// EmitLoadOfLValue - Given an expression that represents a value lvalue, |
| 151 | /// this method emits the address of the lvalue, then loads the result as an |
| 152 | /// rvalue, returning the rvalue. |
| 153 | RValue CodeGenFunction::EmitLoadOfLValue(LValue LV, QualType ExprType) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 154 | if (LV.isSimple()) { |
| 155 | llvm::Value *Ptr = LV.getAddress(); |
| 156 | const llvm::Type *EltTy = |
| 157 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
| 158 | |
| 159 | // Simple scalar l-value. |
Dan Gohman | d79a726 | 2008-05-22 22:12:56 +0000 | [diff] [blame] | 160 | if (EltTy->isSingleValueType()) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 161 | llvm::Value *V = Builder.CreateLoad(Ptr, LV.isVolatileQualified(),"tmp"); |
Chris Lattner | 01e3c9e | 2008-01-30 07:01:17 +0000 | [diff] [blame] | 162 | |
| 163 | // Bool can have different representation in memory than in registers. |
| 164 | if (ExprType->isBooleanType()) { |
| 165 | if (V->getType() != llvm::Type::Int1Ty) |
| 166 | V = Builder.CreateTrunc(V, llvm::Type::Int1Ty, "tobool"); |
| 167 | } |
| 168 | |
| 169 | return RValue::get(V); |
| 170 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 171 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 172 | assert(ExprType->isFunctionType() && "Unknown scalar value"); |
| 173 | return RValue::get(Ptr); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | if (LV.isVectorElt()) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 177 | llvm::Value *Vec = Builder.CreateLoad(LV.getVectorAddr(), |
| 178 | LV.isVolatileQualified(), "tmp"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 179 | return RValue::get(Builder.CreateExtractElement(Vec, LV.getVectorIdx(), |
| 180 | "vecext")); |
| 181 | } |
Chris Lattner | 46ea8eb | 2007-08-03 00:16:29 +0000 | [diff] [blame] | 182 | |
| 183 | // If this is a reference to a subset of the elements of a vector, either |
| 184 | // shuffle the input or extract/insert them as appropriate. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 185 | if (LV.isExtVectorElt()) |
| 186 | return EmitLoadOfExtVectorElementLValue(LV, ExprType); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 187 | |
| 188 | if (LV.isBitfield()) |
| 189 | return EmitLoadOfBitfieldLValue(LV, ExprType); |
| 190 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 191 | if (LV.isPropertyRef()) |
| 192 | return EmitLoadOfPropertyRefLValue(LV, ExprType); |
| 193 | |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 194 | assert(0 && "Unknown LValue type!"); |
Chris Lattner | b1776cb | 2007-09-16 19:23:47 +0000 | [diff] [blame] | 195 | //an invalid RValue, but the assert will |
| 196 | //ensure that this point is never reached |
| 197 | return RValue(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 198 | } |
| 199 | |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 200 | RValue CodeGenFunction::EmitLoadOfBitfieldLValue(LValue LV, |
| 201 | QualType ExprType) { |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 202 | unsigned StartBit = LV.getBitfieldStartBit(); |
| 203 | unsigned BitfieldSize = LV.getBitfieldSize(); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 204 | llvm::Value *Ptr = LV.getBitfieldAddr(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 205 | |
| 206 | const llvm::Type *EltTy = |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 207 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 208 | unsigned EltTySize = CGM.getTargetData().getTypeSizeInBits(EltTy); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 209 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 210 | // In some cases the bitfield may straddle two memory locations. |
| 211 | // Currently we load the entire bitfield, then do the magic to |
| 212 | // sign-extend it if necessary. This results in somewhat more code |
| 213 | // than necessary for the common case (one load), since two shifts |
| 214 | // accomplish both the masking and sign extension. |
| 215 | unsigned LowBits = std::min(BitfieldSize, EltTySize - StartBit); |
| 216 | llvm::Value *Val = Builder.CreateLoad(Ptr, LV.isVolatileQualified(), "tmp"); |
| 217 | |
| 218 | // Shift to proper location. |
Daniel Dunbar | f3edc2f | 2008-11-13 02:20:34 +0000 | [diff] [blame] | 219 | if (StartBit) |
| 220 | Val = Builder.CreateLShr(Val, llvm::ConstantInt::get(EltTy, StartBit), |
| 221 | "bf.lo"); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 222 | |
| 223 | // Mask off unused bits. |
| 224 | llvm::Constant *LowMask = |
| 225 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, LowBits)); |
| 226 | Val = Builder.CreateAnd(Val, LowMask, "bf.lo.cleared"); |
| 227 | |
| 228 | // Fetch the high bits if necessary. |
| 229 | if (LowBits < BitfieldSize) { |
| 230 | unsigned HighBits = BitfieldSize - LowBits; |
| 231 | llvm::Value *HighPtr = |
| 232 | Builder.CreateGEP(Ptr, llvm::ConstantInt::get(llvm::Type::Int32Ty, 1), |
| 233 | "bf.ptr.hi"); |
| 234 | llvm::Value *HighVal = Builder.CreateLoad(HighPtr, |
| 235 | LV.isVolatileQualified(), |
| 236 | "tmp"); |
| 237 | |
| 238 | // Mask off unused bits. |
| 239 | llvm::Constant *HighMask = |
| 240 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, HighBits)); |
| 241 | HighVal = Builder.CreateAnd(HighVal, HighMask, "bf.lo.cleared"); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 242 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 243 | // Shift to proper location and or in to bitfield value. |
| 244 | HighVal = Builder.CreateShl(HighVal, |
| 245 | llvm::ConstantInt::get(EltTy, LowBits)); |
| 246 | Val = Builder.CreateOr(Val, HighVal, "bf.val"); |
| 247 | } |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 248 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 249 | // Sign extend if necessary. |
| 250 | if (LV.isBitfieldSigned()) { |
| 251 | llvm::Value *ExtraBits = llvm::ConstantInt::get(EltTy, |
| 252 | EltTySize - BitfieldSize); |
| 253 | Val = Builder.CreateAShr(Builder.CreateShl(Val, ExtraBits), |
| 254 | ExtraBits, "bf.val.sext"); |
| 255 | } |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 256 | |
| 257 | // The bitfield type and the normal type differ when the storage sizes |
| 258 | // differ (currently just _Bool). |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 259 | Val = Builder.CreateIntCast(Val, ConvertType(ExprType), false, "tmp"); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 260 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 261 | return RValue::get(Val); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 262 | } |
| 263 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 264 | RValue CodeGenFunction::EmitLoadOfPropertyRefLValue(LValue LV, |
| 265 | QualType ExprType) { |
| 266 | return EmitObjCPropertyGet(LV.getPropertyRefExpr()); |
| 267 | } |
| 268 | |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 269 | // If this is a reference to a subset of the elements of a vector, either |
| 270 | // shuffle the input or extract/insert them as appropriate. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 271 | RValue CodeGenFunction::EmitLoadOfExtVectorElementLValue(LValue LV, |
| 272 | QualType ExprType) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 273 | llvm::Value *Vec = Builder.CreateLoad(LV.getExtVectorAddr(), |
| 274 | LV.isVolatileQualified(), "tmp"); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 275 | |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 276 | const llvm::Constant *Elts = LV.getExtVectorElts(); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 277 | |
| 278 | // If the result of the expression is a non-vector type, we must be |
| 279 | // extracting a single element. Just codegen as an extractelement. |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 280 | const VectorType *ExprVT = ExprType->getAsVectorType(); |
| 281 | if (!ExprVT) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 282 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 283 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx); |
| 284 | return RValue::get(Builder.CreateExtractElement(Vec, Elt, "tmp")); |
| 285 | } |
| 286 | |
| 287 | // If the source and destination have the same number of elements, use a |
| 288 | // vector shuffle instead of insert/extracts. |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 289 | unsigned NumResultElts = ExprVT->getNumElements(); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 290 | unsigned NumSourceElts = |
| 291 | cast<llvm::VectorType>(Vec->getType())->getNumElements(); |
| 292 | |
| 293 | if (NumResultElts == NumSourceElts) { |
| 294 | llvm::SmallVector<llvm::Constant*, 4> Mask; |
| 295 | for (unsigned i = 0; i != NumResultElts; ++i) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 296 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 297 | Mask.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx)); |
| 298 | } |
| 299 | |
| 300 | llvm::Value *MaskV = llvm::ConstantVector::get(&Mask[0], Mask.size()); |
| 301 | Vec = Builder.CreateShuffleVector(Vec, |
| 302 | llvm::UndefValue::get(Vec->getType()), |
| 303 | MaskV, "tmp"); |
| 304 | return RValue::get(Vec); |
| 305 | } |
| 306 | |
| 307 | // Start out with an undef of the result type. |
| 308 | llvm::Value *Result = llvm::UndefValue::get(ConvertType(ExprType)); |
| 309 | |
| 310 | // Extract/Insert each element of the result. |
| 311 | for (unsigned i = 0; i != NumResultElts; ++i) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 312 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 313 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx); |
| 314 | Elt = Builder.CreateExtractElement(Vec, Elt, "tmp"); |
| 315 | |
| 316 | llvm::Value *OutIdx = llvm::ConstantInt::get(llvm::Type::Int32Ty, i); |
| 317 | Result = Builder.CreateInsertElement(Result, Elt, OutIdx, "tmp"); |
| 318 | } |
| 319 | |
| 320 | return RValue::get(Result); |
| 321 | } |
| 322 | |
| 323 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 324 | |
| 325 | /// EmitStoreThroughLValue - Store the specified rvalue into the specified |
| 326 | /// lvalue, where both are guaranteed to the have the same type, and that type |
| 327 | /// is 'Ty'. |
| 328 | void CodeGenFunction::EmitStoreThroughLValue(RValue Src, LValue Dst, |
| 329 | QualType Ty) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 330 | if (!Dst.isSimple()) { |
| 331 | if (Dst.isVectorElt()) { |
| 332 | // Read/modify/write the vector, inserting the new element. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 333 | llvm::Value *Vec = Builder.CreateLoad(Dst.getVectorAddr(), |
| 334 | Dst.isVolatileQualified(), "tmp"); |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 335 | Vec = Builder.CreateInsertElement(Vec, Src.getScalarVal(), |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 336 | Dst.getVectorIdx(), "vecins"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 337 | Builder.CreateStore(Vec, Dst.getVectorAddr(),Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 338 | return; |
| 339 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 340 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 341 | // If this is an update of extended vector elements, insert them as |
| 342 | // appropriate. |
| 343 | if (Dst.isExtVectorElt()) |
| 344 | return EmitStoreThroughExtVectorComponentLValue(Src, Dst, Ty); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 345 | |
| 346 | if (Dst.isBitfield()) |
| 347 | return EmitStoreThroughBitfieldLValue(Src, Dst, Ty); |
| 348 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 349 | if (Dst.isPropertyRef()) |
| 350 | return EmitStoreThroughPropertyRefLValue(Src, Dst, Ty); |
| 351 | |
Lauro Ramos Venancio | 6553982 | 2008-01-22 22:38:35 +0000 | [diff] [blame] | 352 | assert(0 && "Unknown LValue type"); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 353 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 354 | |
| 355 | llvm::Value *DstAddr = Dst.getAddress(); |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 356 | assert(Src.isScalar() && "Can't emit an agg store with this method"); |
| 357 | // FIXME: Handle volatility etc. |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 358 | const llvm::Type *SrcTy = Src.getScalarVal()->getType(); |
Christopher Lamb | ddc23f3 | 2007-12-17 01:11:20 +0000 | [diff] [blame] | 359 | const llvm::PointerType *DstPtr = cast<llvm::PointerType>(DstAddr->getType()); |
| 360 | const llvm::Type *AddrTy = DstPtr->getElementType(); |
| 361 | unsigned AS = DstPtr->getAddressSpace(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 362 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 363 | if (AddrTy != SrcTy) |
Christopher Lamb | ddc23f3 | 2007-12-17 01:11:20 +0000 | [diff] [blame] | 364 | DstAddr = Builder.CreateBitCast(DstAddr, |
| 365 | llvm::PointerType::get(SrcTy, AS), |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 366 | "storetmp"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 367 | Builder.CreateStore(Src.getScalarVal(), DstAddr, Dst.isVolatileQualified()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 368 | } |
| 369 | |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 370 | void CodeGenFunction::EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, |
| 371 | QualType Ty) { |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 372 | unsigned StartBit = Dst.getBitfieldStartBit(); |
| 373 | unsigned BitfieldSize = Dst.getBitfieldSize(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 374 | llvm::Value *Ptr = Dst.getBitfieldAddr(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 375 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 376 | const llvm::Type *EltTy = |
| 377 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
| 378 | unsigned EltTySize = CGM.getTargetData().getTypeSizeInBits(EltTy); |
| 379 | |
| 380 | // Get the new value, cast to the appropriate type and masked to |
| 381 | // exactly the size of the bit-field. |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 382 | llvm::Value *NewVal = Src.getScalarVal(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 383 | NewVal = Builder.CreateIntCast(NewVal, EltTy, false, "tmp"); |
| 384 | llvm::Constant *Mask = |
| 385 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, BitfieldSize)); |
| 386 | NewVal = Builder.CreateAnd(NewVal, Mask, "bf.value"); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 387 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 388 | // In some cases the bitfield may straddle two memory locations. |
| 389 | // Emit the low part first and check to see if the high needs to be |
| 390 | // done. |
| 391 | unsigned LowBits = std::min(BitfieldSize, EltTySize - StartBit); |
| 392 | llvm::Value *LowVal = Builder.CreateLoad(Ptr, Dst.isVolatileQualified(), |
| 393 | "bf.prev.low"); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 394 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 395 | // Compute the mask for zero-ing the low part of this bitfield. |
| 396 | llvm::Constant *InvMask = |
| 397 | llvm::ConstantInt::get(~llvm::APInt::getBitsSet(EltTySize, StartBit, |
| 398 | StartBit + LowBits)); |
| 399 | |
| 400 | // Compute the new low part as |
| 401 | // LowVal = (LowVal & InvMask) | (NewVal << StartBit), |
| 402 | // with the shift of NewVal implicitly stripping the high bits. |
| 403 | llvm::Value *NewLowVal = |
| 404 | Builder.CreateShl(NewVal, llvm::ConstantInt::get(EltTy, StartBit), |
| 405 | "bf.value.lo"); |
| 406 | LowVal = Builder.CreateAnd(LowVal, InvMask, "bf.prev.lo.cleared"); |
| 407 | LowVal = Builder.CreateOr(LowVal, NewLowVal, "bf.new.lo"); |
| 408 | |
| 409 | // Write back. |
| 410 | Builder.CreateStore(LowVal, Ptr, Dst.isVolatileQualified()); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 411 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 412 | // If the low part doesn't cover the bitfield emit a high part. |
| 413 | if (LowBits < BitfieldSize) { |
| 414 | unsigned HighBits = BitfieldSize - LowBits; |
| 415 | llvm::Value *HighPtr = |
| 416 | Builder.CreateGEP(Ptr, llvm::ConstantInt::get(llvm::Type::Int32Ty, 1), |
| 417 | "bf.ptr.hi"); |
| 418 | llvm::Value *HighVal = Builder.CreateLoad(HighPtr, |
| 419 | Dst.isVolatileQualified(), |
| 420 | "bf.prev.hi"); |
| 421 | |
| 422 | // Compute the mask for zero-ing the high part of this bitfield. |
| 423 | llvm::Constant *InvMask = |
| 424 | llvm::ConstantInt::get(~llvm::APInt::getLowBitsSet(EltTySize, HighBits)); |
| 425 | |
| 426 | // Compute the new high part as |
| 427 | // HighVal = (HighVal & InvMask) | (NewVal lshr LowBits), |
| 428 | // where the high bits of NewVal have already been cleared and the |
| 429 | // shift stripping the low bits. |
| 430 | llvm::Value *NewHighVal = |
| 431 | Builder.CreateLShr(NewVal, llvm::ConstantInt::get(EltTy, LowBits), |
| 432 | "bf.value.high"); |
| 433 | HighVal = Builder.CreateAnd(HighVal, InvMask, "bf.prev.hi.cleared"); |
| 434 | HighVal = Builder.CreateOr(HighVal, NewHighVal, "bf.new.hi"); |
| 435 | |
| 436 | // Write back. |
| 437 | Builder.CreateStore(HighVal, HighPtr, Dst.isVolatileQualified()); |
| 438 | } |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 439 | } |
| 440 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 441 | void CodeGenFunction::EmitStoreThroughPropertyRefLValue(RValue Src, |
| 442 | LValue Dst, |
| 443 | QualType Ty) { |
| 444 | EmitObjCPropertySet(Dst.getPropertyRefExpr(), Src); |
| 445 | } |
| 446 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 447 | void CodeGenFunction::EmitStoreThroughExtVectorComponentLValue(RValue Src, |
| 448 | LValue Dst, |
| 449 | QualType Ty) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 450 | // This access turns into a read/modify/write of the vector. Load the input |
| 451 | // value now. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 452 | llvm::Value *Vec = Builder.CreateLoad(Dst.getExtVectorAddr(), |
| 453 | Dst.isVolatileQualified(), "tmp"); |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 454 | const llvm::Constant *Elts = Dst.getExtVectorElts(); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 455 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 456 | llvm::Value *SrcVal = Src.getScalarVal(); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 457 | |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 458 | if (const VectorType *VTy = Ty->getAsVectorType()) { |
| 459 | unsigned NumSrcElts = VTy->getNumElements(); |
| 460 | |
| 461 | // Extract/Insert each element. |
| 462 | for (unsigned i = 0; i != NumSrcElts; ++i) { |
| 463 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, i); |
| 464 | Elt = Builder.CreateExtractElement(SrcVal, Elt, "tmp"); |
| 465 | |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 466 | unsigned Idx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 467 | llvm::Value *OutIdx = llvm::ConstantInt::get(llvm::Type::Int32Ty, Idx); |
| 468 | Vec = Builder.CreateInsertElement(Vec, Elt, OutIdx, "tmp"); |
| 469 | } |
| 470 | } else { |
| 471 | // 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] | 472 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 473 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx); |
| 474 | Vec = Builder.CreateInsertElement(Vec, SrcVal, Elt, "tmp"); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 475 | } |
| 476 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 477 | Builder.CreateStore(Vec, Dst.getExtVectorAddr(), Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 478 | } |
| 479 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 480 | |
| 481 | LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 482 | const VarDecl *VD = dyn_cast<VarDecl>(E->getDecl()); |
| 483 | |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 484 | if (VD && (VD->isBlockVarDecl() || isa<ParmVarDecl>(VD) || |
| 485 | isa<ImplicitParamDecl>(VD))) { |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 486 | if (VD->getStorageClass() == VarDecl::Extern) |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 487 | return LValue::MakeAddr(CGM.GetAddrOfGlobalVar(VD), |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 488 | E->getType().getCVRQualifiers()); |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 489 | else { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 490 | llvm::Value *V = LocalDeclMap[VD]; |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 491 | assert(V && "BlockVarDecl not entered in LocalDeclMap?"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 492 | return LValue::MakeAddr(V, E->getType().getCVRQualifiers()); |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 493 | } |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 494 | } else if (VD && VD->isFileVarDecl()) { |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 495 | return LValue::MakeAddr(CGM.GetAddrOfGlobalVar(VD), |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 496 | E->getType().getCVRQualifiers()); |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 497 | } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(E->getDecl())) { |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 498 | return LValue::MakeAddr(CGM.GetAddrOfFunction(FD), |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 499 | E->getType().getCVRQualifiers()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 500 | } |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 501 | else if (const ImplicitParamDecl *IPD = |
| 502 | dyn_cast<ImplicitParamDecl>(E->getDecl())) { |
| 503 | llvm::Value *V = LocalDeclMap[IPD]; |
| 504 | assert(V && "BlockVarDecl not entered in LocalDeclMap?"); |
| 505 | return LValue::MakeAddr(V, E->getType().getCVRQualifiers()); |
| 506 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 507 | assert(0 && "Unimp declref"); |
Chris Lattner | b1776cb | 2007-09-16 19:23:47 +0000 | [diff] [blame] | 508 | //an invalid LValue, but the assert will |
| 509 | //ensure that this point is never reached. |
| 510 | return LValue(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | LValue CodeGenFunction::EmitUnaryOpLValue(const UnaryOperator *E) { |
| 514 | // __extension__ doesn't affect lvalue-ness. |
| 515 | if (E->getOpcode() == UnaryOperator::Extension) |
| 516 | return EmitLValue(E->getSubExpr()); |
| 517 | |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 518 | QualType ExprTy = getContext().getCanonicalType(E->getSubExpr()->getType()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 519 | switch (E->getOpcode()) { |
| 520 | default: assert(0 && "Unknown unary operator lvalue!"); |
| 521 | case UnaryOperator::Deref: |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 522 | return LValue::MakeAddr(EmitScalarExpr(E->getSubExpr()), |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 523 | ExprTy->getAsPointerType()->getPointeeType() |
| 524 | .getCVRQualifiers()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 525 | case UnaryOperator::Real: |
| 526 | case UnaryOperator::Imag: |
| 527 | LValue LV = EmitLValue(E->getSubExpr()); |
Chris Lattner | 36b6a0a | 2008-03-19 05:19:41 +0000 | [diff] [blame] | 528 | unsigned Idx = E->getOpcode() == UnaryOperator::Imag; |
| 529 | return LValue::MakeAddr(Builder.CreateStructGEP(LV.getAddress(), |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 530 | Idx, "idx"), |
| 531 | ExprTy.getCVRQualifiers()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 532 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | LValue CodeGenFunction::EmitStringLiteralLValue(const StringLiteral *E) { |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 536 | return LValue::MakeAddr(CGM.GetAddrOfConstantStringFromLiteral(E), 0); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 537 | } |
| 538 | |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 539 | LValue CodeGenFunction::EmitPredefinedFunctionName(unsigned Type) { |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 540 | std::string GlobalVarName; |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 541 | |
| 542 | switch (Type) { |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 543 | default: |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 544 | assert(0 && "Invalid type"); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 545 | case PredefinedExpr::Func: |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 546 | GlobalVarName = "__func__."; |
| 547 | break; |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 548 | case PredefinedExpr::Function: |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 549 | GlobalVarName = "__FUNCTION__."; |
| 550 | break; |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 551 | case PredefinedExpr::PrettyFunction: |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 552 | // FIXME:: Demangle C++ method names |
| 553 | GlobalVarName = "__PRETTY_FUNCTION__."; |
| 554 | break; |
| 555 | } |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 556 | |
| 557 | std::string FunctionName; |
| 558 | if(const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurFuncDecl)) { |
| 559 | FunctionName = FD->getName(); |
| 560 | } else { |
| 561 | // Just get the mangled name. |
| 562 | FunctionName = CurFn->getName(); |
| 563 | } |
| 564 | |
Chris Lattner | c8aa5f1 | 2008-04-04 04:07:35 +0000 | [diff] [blame] | 565 | GlobalVarName += FunctionName; |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 566 | llvm::Constant *C = |
| 567 | CGM.GetAddrOfConstantCString(FunctionName, GlobalVarName.c_str()); |
| 568 | return LValue::MakeAddr(C, 0); |
| 569 | } |
| 570 | |
| 571 | LValue CodeGenFunction::EmitPredefinedLValue(const PredefinedExpr *E) { |
| 572 | switch (E->getIdentType()) { |
| 573 | default: |
| 574 | return EmitUnsupportedLValue(E, "predefined expression"); |
| 575 | case PredefinedExpr::Func: |
| 576 | case PredefinedExpr::Function: |
| 577 | case PredefinedExpr::PrettyFunction: |
| 578 | return EmitPredefinedFunctionName(E->getIdentType()); |
| 579 | } |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 580 | } |
| 581 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 582 | LValue CodeGenFunction::EmitArraySubscriptExpr(const ArraySubscriptExpr *E) { |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 583 | // 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] | 584 | llvm::Value *Idx = EmitScalarExpr(E->getIdx()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 585 | |
| 586 | // If the base is a vector type, then we are forming a vector element lvalue |
| 587 | // with this subscript. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 588 | if (E->getBase()->getType()->isVectorType()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 589 | // Emit the vector as an lvalue to get its address. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 590 | LValue LHS = EmitLValue(E->getBase()); |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 591 | assert(LHS.isSimple() && "Can only subscript lvalue vectors here!"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 592 | // FIXME: This should properly sign/zero/extend or truncate Idx to i32. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 593 | return LValue::MakeVectorElt(LHS.getAddress(), Idx, |
| 594 | E->getBase()->getType().getCVRQualifiers()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 595 | } |
| 596 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 597 | // 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] | 598 | llvm::Value *Base = EmitScalarExpr(E->getBase()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 599 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 600 | // Extend or truncate the index type to 32 or 64-bits. |
Chris Lattner | d4f0802 | 2007-08-08 17:43:05 +0000 | [diff] [blame] | 601 | QualType IdxTy = E->getIdx()->getType(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 602 | bool IdxSigned = IdxTy->isSignedIntegerType(); |
| 603 | unsigned IdxBitwidth = cast<llvm::IntegerType>(Idx->getType())->getBitWidth(); |
| 604 | if (IdxBitwidth != LLVMPointerWidth) |
| 605 | Idx = Builder.CreateIntCast(Idx, llvm::IntegerType::get(LLVMPointerWidth), |
| 606 | IdxSigned, "idxprom"); |
| 607 | |
| 608 | // We know that the pointer points to a type of the correct size, unless the |
| 609 | // size is a VLA. |
Eli Friedman | 3c2b317 | 2008-02-15 12:20:59 +0000 | [diff] [blame] | 610 | if (!E->getType()->isConstantSizeType()) |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 611 | return EmitUnsupportedLValue(E, "VLA index"); |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 612 | QualType ExprTy = getContext().getCanonicalType(E->getBase()->getType()); |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 613 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 614 | return LValue::MakeAddr(Builder.CreateGEP(Base, Idx, "arrayidx"), |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 615 | ExprTy->getAsPointerType()->getPointeeType() |
| 616 | .getCVRQualifiers()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 617 | } |
| 618 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 619 | static |
| 620 | llvm::Constant *GenerateConstantVector(llvm::SmallVector<unsigned, 4> &Elts) { |
| 621 | llvm::SmallVector<llvm::Constant *, 4> CElts; |
| 622 | |
| 623 | for (unsigned i = 0, e = Elts.size(); i != e; ++i) |
| 624 | CElts.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, Elts[i])); |
| 625 | |
| 626 | return llvm::ConstantVector::get(&CElts[0], CElts.size()); |
| 627 | } |
| 628 | |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 629 | LValue CodeGenFunction:: |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 630 | EmitExtVectorElementExpr(const ExtVectorElementExpr *E) { |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 631 | // Emit the base vector as an l-value. |
| 632 | LValue Base = EmitLValue(E->getBase()); |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 633 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 634 | // Encode the element access list into a vector of unsigned indices. |
| 635 | llvm::SmallVector<unsigned, 4> Indices; |
| 636 | E->getEncodedElementAccess(Indices); |
| 637 | |
| 638 | if (Base.isSimple()) { |
| 639 | llvm::Constant *CV = GenerateConstantVector(Indices); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 640 | return LValue::MakeExtVectorElt(Base.getAddress(), CV, |
| 641 | E->getBase()->getType().getCVRQualifiers()); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 642 | } |
| 643 | assert(Base.isExtVectorElt() && "Can only subscript lvalue vec elts here!"); |
| 644 | |
| 645 | llvm::Constant *BaseElts = Base.getExtVectorElts(); |
| 646 | llvm::SmallVector<llvm::Constant *, 4> CElts; |
| 647 | |
| 648 | for (unsigned i = 0, e = Indices.size(); i != e; ++i) { |
| 649 | if (isa<llvm::ConstantAggregateZero>(BaseElts)) |
| 650 | CElts.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, 0)); |
| 651 | else |
| 652 | CElts.push_back(BaseElts->getOperand(Indices[i])); |
| 653 | } |
| 654 | llvm::Constant *CV = llvm::ConstantVector::get(&CElts[0], CElts.size()); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 655 | return LValue::MakeExtVectorElt(Base.getExtVectorAddr(), CV, |
| 656 | E->getBase()->getType().getCVRQualifiers()); |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 657 | } |
| 658 | |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 659 | LValue CodeGenFunction::EmitMemberExpr(const MemberExpr *E) { |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 660 | bool isUnion = false; |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 661 | Expr *BaseExpr = E->getBase(); |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 662 | llvm::Value *BaseValue = NULL; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 663 | unsigned CVRQualifiers=0; |
| 664 | |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 665 | // 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] | 666 | if (E->isArrow()) { |
Devang Patel | 0a96118 | 2007-10-26 18:15:21 +0000 | [diff] [blame] | 667 | BaseValue = EmitScalarExpr(BaseExpr); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 668 | const PointerType *PTy = |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 669 | cast<PointerType>(getContext().getCanonicalType(BaseExpr->getType())); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 670 | if (PTy->getPointeeType()->isUnionType()) |
| 671 | isUnion = true; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 672 | CVRQualifiers = PTy->getPointeeType().getCVRQualifiers(); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 673 | } |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 674 | else { |
| 675 | LValue BaseLV = EmitLValue(BaseExpr); |
| 676 | // FIXME: this isn't right for bitfields. |
| 677 | BaseValue = BaseLV.getAddress(); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 678 | if (BaseExpr->getType()->isUnionType()) |
| 679 | isUnion = true; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 680 | CVRQualifiers = BaseExpr->getType().getCVRQualifiers(); |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 681 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 682 | |
| 683 | FieldDecl *Field = E->getMemberDecl(); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 684 | return EmitLValueForField(BaseValue, Field, isUnion, CVRQualifiers); |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 685 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 686 | |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 687 | LValue CodeGenFunction::EmitLValueForField(llvm::Value* BaseValue, |
| 688 | FieldDecl* Field, |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 689 | bool isUnion, |
| 690 | unsigned CVRQualifiers) |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 691 | { |
| 692 | llvm::Value *V; |
| 693 | unsigned idx = CGM.getTypes().getLLVMFieldNo(Field); |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 694 | |
Eli Friedman | 1e86b34 | 2008-05-29 11:33:25 +0000 | [diff] [blame] | 695 | if (Field->isBitField()) { |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 696 | // FIXME: CodeGenTypes should expose a method to get the appropriate |
| 697 | // type for FieldTy (the appropriate type is ABI-dependent). |
Eli Friedman | bfe08e0 | 2008-06-01 15:16:01 +0000 | [diff] [blame] | 698 | const llvm::Type *FieldTy = CGM.getTypes().ConvertTypeForMem(Field->getType()); |
Chris Lattner | 36b6a0a | 2008-03-19 05:19:41 +0000 | [diff] [blame] | 699 | const llvm::PointerType *BaseTy = |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 700 | cast<llvm::PointerType>(BaseValue->getType()); |
| 701 | unsigned AS = BaseTy->getAddressSpace(); |
| 702 | BaseValue = Builder.CreateBitCast(BaseValue, |
| 703 | llvm::PointerType::get(FieldTy, AS), |
| 704 | "tmp"); |
| 705 | V = Builder.CreateGEP(BaseValue, |
| 706 | llvm::ConstantInt::get(llvm::Type::Int32Ty, idx), |
| 707 | "tmp"); |
Eli Friedman | 1e86b34 | 2008-05-29 11:33:25 +0000 | [diff] [blame] | 708 | |
| 709 | CodeGenTypes::BitFieldInfo bitFieldInfo = |
| 710 | CGM.getTypes().getBitFieldInfo(Field); |
| 711 | return LValue::MakeBitfield(V, bitFieldInfo.Begin, bitFieldInfo.Size, |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 712 | Field->getType()->isSignedIntegerType(), |
| 713 | Field->getType().getCVRQualifiers()|CVRQualifiers); |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 714 | } |
Eli Friedman | bfe08e0 | 2008-06-01 15:16:01 +0000 | [diff] [blame] | 715 | |
Eli Friedman | 1e86b34 | 2008-05-29 11:33:25 +0000 | [diff] [blame] | 716 | V = Builder.CreateStructGEP(BaseValue, idx, "tmp"); |
| 717 | |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 718 | // Match union field type. |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 719 | if (isUnion) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 720 | const llvm::Type *FieldTy = |
| 721 | CGM.getTypes().ConvertTypeForMem(Field->getType()); |
Devang Patel | e9b8c0a | 2007-10-30 20:59:40 +0000 | [diff] [blame] | 722 | const llvm::PointerType * BaseTy = |
| 723 | cast<llvm::PointerType>(BaseValue->getType()); |
Eli Friedman | 788d571 | 2008-05-21 13:24:44 +0000 | [diff] [blame] | 724 | unsigned AS = BaseTy->getAddressSpace(); |
| 725 | V = Builder.CreateBitCast(V, |
| 726 | llvm::PointerType::get(FieldTy, AS), |
| 727 | "tmp"); |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 728 | } |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 729 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 730 | return LValue::MakeAddr(V, |
| 731 | Field->getType().getCVRQualifiers()|CVRQualifiers); |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 732 | } |
| 733 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 734 | LValue CodeGenFunction::EmitCompoundLiteralLValue(const CompoundLiteralExpr* E) |
| 735 | { |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 736 | const llvm::Type *LTy = ConvertType(E->getType()); |
| 737 | llvm::Value *DeclPtr = CreateTempAlloca(LTy, ".compoundliteral"); |
| 738 | |
| 739 | const Expr* InitExpr = E->getInitializer(); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 740 | LValue Result = LValue::MakeAddr(DeclPtr, E->getType().getCVRQualifiers()); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 741 | |
| 742 | if (E->getType()->isComplexType()) { |
| 743 | EmitComplexExprIntoAddr(InitExpr, DeclPtr, false); |
| 744 | } else if (hasAggregateLLVMType(E->getType())) { |
| 745 | EmitAnyExpr(InitExpr, DeclPtr, false); |
| 746 | } else { |
| 747 | EmitStoreThroughLValue(EmitAnyExpr(InitExpr), Result, E->getType()); |
| 748 | } |
| 749 | |
| 750 | return Result; |
| 751 | } |
| 752 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 753 | //===--------------------------------------------------------------------===// |
| 754 | // Expression Emission |
| 755 | //===--------------------------------------------------------------------===// |
| 756 | |
Chris Lattner | 7016a70 | 2007-08-20 22:37:10 +0000 | [diff] [blame] | 757 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 758 | RValue CodeGenFunction::EmitCallExpr(const CallExpr *E) { |
Anders Carlsson | 022012e | 2007-08-20 18:05:56 +0000 | [diff] [blame] | 759 | if (const ImplicitCastExpr *IcExpr = |
| 760 | dyn_cast<const ImplicitCastExpr>(E->getCallee())) |
| 761 | if (const DeclRefExpr *DRExpr = |
| 762 | dyn_cast<const DeclRefExpr>(IcExpr->getSubExpr())) |
| 763 | if (const FunctionDecl *FDecl = |
| 764 | dyn_cast<const FunctionDecl>(DRExpr->getDecl())) |
| 765 | if (unsigned builtinID = FDecl->getIdentifier()->getBuiltinID()) |
| 766 | return EmitBuiltinExpr(builtinID, E); |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 767 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 768 | llvm::Value *Callee = EmitScalarExpr(E->getCallee()); |
Eli Friedman | 5193b8a | 2008-01-30 01:32:06 +0000 | [diff] [blame] | 769 | return EmitCallExpr(Callee, E->getCallee()->getType(), |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 770 | E->arg_begin(), E->arg_end()); |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 771 | } |
| 772 | |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 773 | RValue CodeGenFunction::EmitCallExpr(Expr *FnExpr, |
| 774 | CallExpr::const_arg_iterator ArgBeg, |
| 775 | CallExpr::const_arg_iterator ArgEnd) { |
| 776 | |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 777 | llvm::Value *Callee = EmitScalarExpr(FnExpr); |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 778 | return EmitCallExpr(Callee, FnExpr->getType(), ArgBeg, ArgEnd); |
Chris Lattner | c5e940f | 2007-08-31 04:44:06 +0000 | [diff] [blame] | 779 | } |
| 780 | |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 781 | LValue CodeGenFunction::EmitBinaryOperatorLValue(const BinaryOperator *E) { |
| 782 | // Can only get l-value for binary operator expressions which are a |
| 783 | // simple assignment of aggregate type. |
| 784 | if (E->getOpcode() != BinaryOperator::Assign) |
| 785 | return EmitUnsupportedLValue(E, "binary l-value expression"); |
| 786 | |
| 787 | llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType())); |
| 788 | EmitAggExpr(E, Temp, false); |
| 789 | // FIXME: Are these qualifiers correct? |
| 790 | return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers()); |
| 791 | } |
| 792 | |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 793 | LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E) { |
| 794 | // Can only get l-value for call expression returning aggregate type |
| 795 | RValue RV = EmitCallExpr(E); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 796 | // FIXME: can this be volatile? |
| 797 | return LValue::MakeAddr(RV.getAggregateAddr(), |
| 798 | E->getType().getCVRQualifiers()); |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 799 | } |
| 800 | |
Argyrios Kyrtzidis | e3a09e6 | 2008-09-10 02:36:38 +0000 | [diff] [blame] | 801 | LValue |
| 802 | CodeGenFunction::EmitCXXConditionDeclLValue(const CXXConditionDeclExpr *E) { |
| 803 | EmitLocalBlockVarDecl(*E->getVarDecl()); |
| 804 | return EmitDeclRefLValue(E); |
| 805 | } |
| 806 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 807 | LValue CodeGenFunction::EmitObjCMessageExprLValue(const ObjCMessageExpr *E) { |
| 808 | // Can only get l-value for message expression returning aggregate type |
| 809 | RValue RV = EmitObjCMessageExpr(E); |
| 810 | // FIXME: can this be volatile? |
| 811 | return LValue::MakeAddr(RV.getAggregateAddr(), |
| 812 | E->getType().getCVRQualifiers()); |
| 813 | } |
| 814 | |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 815 | llvm::Value *CodeGenFunction::EmitIvarOffset(ObjCInterfaceDecl *Interface, |
| 816 | const ObjCIvarDecl *Ivar) { |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 817 | // Objective-C objects are traditionally C structures with their layout |
| 818 | // defined at compile-time. In some implementations, their layout is not |
| 819 | // defined until run time in order to allow instance variables to be added to |
| 820 | // a class without recompiling all of the subclasses. If this is the case |
| 821 | // then the CGObjCRuntime subclass must return true to LateBoundIvars and |
| 822 | // implement the lookup itself. |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 823 | if (CGM.getObjCRuntime().LateBoundIVars()) |
| 824 | assert(0 && "late-bound ivars are unsupported"); |
Chris Lattner | c8aa5f1 | 2008-04-04 04:07:35 +0000 | [diff] [blame] | 825 | |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 826 | const llvm::Type *InterfaceLTy = |
| 827 | CGM.getTypes().ConvertType(getContext().getObjCInterfaceType(Interface)); |
| 828 | const llvm::StructLayout *Layout = |
| 829 | CGM.getTargetData().getStructLayout(cast<llvm::StructType>(InterfaceLTy)); |
| 830 | uint64_t Offset = |
| 831 | Layout->getElementOffset(CGM.getTypes().getLLVMFieldNo(Ivar)); |
| 832 | |
| 833 | return llvm::ConstantInt::get(CGM.getTypes().ConvertType(getContext().LongTy), |
| 834 | Offset); |
| 835 | } |
| 836 | |
| 837 | LValue CodeGenFunction::EmitLValueForIvar(llvm::Value *BaseValue, |
| 838 | const ObjCIvarDecl *Ivar, |
| 839 | unsigned CVRQualifiers) { |
| 840 | // See comment in EmitIvarOffset. |
| 841 | if (CGM.getObjCRuntime().LateBoundIVars()) |
| 842 | assert(0 && "late-bound ivars are unsupported"); |
| 843 | |
| 844 | if (Ivar->isBitField()) |
| 845 | assert(0 && "ivar bitfields are unsupported"); |
| 846 | |
| 847 | // TODO: Add a special case for isa (index 0) |
| 848 | unsigned Index = CGM.getTypes().getLLVMFieldNo(Ivar); |
| 849 | |
| 850 | llvm::Value *V = Builder.CreateStructGEP(BaseValue, Index, "tmp"); |
| 851 | return LValue::MakeAddr(V, Ivar->getType().getCVRQualifiers()|CVRQualifiers); |
| 852 | } |
| 853 | |
| 854 | LValue CodeGenFunction::EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E) { |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 855 | // FIXME: A lot of the code below could be shared with EmitMemberExpr. |
| 856 | llvm::Value *BaseValue = 0; |
| 857 | const Expr *BaseExpr = E->getBase(); |
| 858 | unsigned CVRQualifiers = 0; |
| 859 | if (E->isArrow()) { |
| 860 | BaseValue = EmitScalarExpr(BaseExpr); |
| 861 | const PointerType *PTy = |
| 862 | cast<PointerType>(getContext().getCanonicalType(BaseExpr->getType())); |
| 863 | CVRQualifiers = PTy->getPointeeType().getCVRQualifiers(); |
| 864 | } else { |
| 865 | LValue BaseLV = EmitLValue(BaseExpr); |
| 866 | // FIXME: this isn't right for bitfields. |
| 867 | BaseValue = BaseLV.getAddress(); |
| 868 | CVRQualifiers = BaseExpr->getType().getCVRQualifiers(); |
| 869 | } |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 870 | |
| 871 | return EmitLValueForIvar(BaseValue, E->getDecl(), CVRQualifiers); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 872 | } |
| 873 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 874 | LValue |
| 875 | CodeGenFunction::EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E) { |
| 876 | // This is a special l-value that just issues sends when we load or |
| 877 | // store through it. |
| 878 | return LValue::MakePropertyRef(E, E->getType().getCVRQualifiers()); |
| 879 | } |
| 880 | |
Douglas Gregor | cd9b46e | 2008-11-04 14:56:14 +0000 | [diff] [blame] | 881 | LValue |
| 882 | CodeGenFunction::EmitObjCSuperExpr(const ObjCSuperExpr *E) { |
| 883 | return EmitUnsupportedLValue(E, "use of super"); |
| 884 | } |
| 885 | |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 886 | RValue CodeGenFunction::EmitCallExpr(llvm::Value *Callee, QualType FnType, |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 887 | CallExpr::const_arg_iterator ArgBeg, |
| 888 | CallExpr::const_arg_iterator ArgEnd) { |
| 889 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 890 | // The callee type will always be a pointer to function type, get the function |
| 891 | // type. |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 892 | FnType = FnType->getAsPointerType()->getPointeeType(); |
Chris Lattner | 05d2fb4 | 2008-07-31 04:58:58 +0000 | [diff] [blame] | 893 | QualType ResultType = FnType->getAsFunctionType()->getResultType(); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 894 | |
| 895 | CallArgList Args; |
| 896 | for (CallExpr::const_arg_iterator I = ArgBeg; I != ArgEnd; ++I) |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 897 | Args.push_back(std::make_pair(EmitAnyExprToTemp(*I), |
| 898 | I->getType())); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 899 | |
| 900 | return EmitCall(Callee, ResultType, Args); |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 901 | } |