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 | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 16 | #include "CGObjCRuntime.h" |
Daniel Dunbar | de7fb84 | 2008-08-11 05:00:27 +0000 | [diff] [blame] | 17 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 18 | #include "clang/AST/DeclObjC.h" |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 19 | #include "llvm/Target/TargetData.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 20 | using namespace clang; |
| 21 | using namespace CodeGen; |
| 22 | |
| 23 | //===--------------------------------------------------------------------===// |
| 24 | // Miscellaneous Helper Methods |
| 25 | //===--------------------------------------------------------------------===// |
| 26 | |
| 27 | /// CreateTempAlloca - This creates a alloca and inserts it into the entry |
| 28 | /// block. |
| 29 | llvm::AllocaInst *CodeGenFunction::CreateTempAlloca(const llvm::Type *Ty, |
| 30 | const char *Name) { |
| 31 | return new llvm::AllocaInst(Ty, 0, Name, AllocaInsertPt); |
| 32 | } |
| 33 | |
| 34 | /// EvaluateExprAsBool - Perform the usual unary conversions on the specified |
| 35 | /// expression and compare the result against zero, returning an Int1Ty value. |
| 36 | llvm::Value *CodeGenFunction::EvaluateExprAsBool(const Expr *E) { |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 37 | QualType BoolTy = getContext().BoolTy; |
Chris Lattner | 9b2dc28 | 2008-04-04 16:54:41 +0000 | [diff] [blame] | 38 | if (!E->getType()->isAnyComplexType()) |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 39 | return EmitScalarConversion(EmitScalarExpr(E), E->getType(), BoolTy); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 40 | |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 41 | return EmitComplexToScalarConversion(EmitComplexExpr(E), E->getType(),BoolTy); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 42 | } |
| 43 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 44 | /// EmitAnyExpr - Emit code to compute the specified expression which can have |
| 45 | /// any type. The result is returned as an RValue struct. If this is an |
| 46 | /// aggregate expression, the aggloc/agglocvolatile arguments indicate where |
| 47 | /// the result should be returned. |
| 48 | RValue CodeGenFunction::EmitAnyExpr(const Expr *E, llvm::Value *AggLoc, |
| 49 | bool isAggLocVolatile) { |
| 50 | if (!hasAggregateLLVMType(E->getType())) |
| 51 | return RValue::get(EmitScalarExpr(E)); |
Chris Lattner | 9b2dc28 | 2008-04-04 16:54:41 +0000 | [diff] [blame] | 52 | else if (E->getType()->isAnyComplexType()) |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 53 | return RValue::getComplex(EmitComplexExpr(E)); |
| 54 | |
| 55 | EmitAggExpr(E, AggLoc, isAggLocVolatile); |
| 56 | return RValue::getAggregate(AggLoc); |
| 57 | } |
| 58 | |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 59 | /// getAccessedFieldNo - Given an encoded value and a result number, return |
| 60 | /// the input field number being accessed. |
| 61 | unsigned CodeGenFunction::getAccessedFieldNo(unsigned Idx, |
| 62 | const llvm::Constant *Elts) { |
| 63 | if (isa<llvm::ConstantAggregateZero>(Elts)) |
| 64 | return 0; |
| 65 | |
| 66 | return cast<llvm::ConstantInt>(Elts->getOperand(Idx))->getZExtValue(); |
| 67 | } |
| 68 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 69 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 70 | //===----------------------------------------------------------------------===// |
| 71 | // LValue Expression Emission |
| 72 | //===----------------------------------------------------------------------===// |
| 73 | |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 74 | LValue CodeGenFunction::EmitUnsupportedLValue(const Expr *E, |
| 75 | const char *Name) { |
| 76 | ErrorUnsupported(E, Name); |
| 77 | llvm::Type *Ty = llvm::PointerType::getUnqual(ConvertType(E->getType())); |
| 78 | return LValue::MakeAddr(llvm::UndefValue::get(Ty), |
| 79 | E->getType().getCVRQualifiers()); |
| 80 | } |
| 81 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 82 | /// EmitLValue - Emit code to compute a designator that specifies the location |
| 83 | /// of the expression. |
| 84 | /// |
| 85 | /// This can return one of two things: a simple address or a bitfield |
| 86 | /// reference. In either case, the LLVM Value* in the LValue structure is |
| 87 | /// guaranteed to be an LLVM pointer type. |
| 88 | /// |
| 89 | /// If this returns a bitfield reference, nothing about the pointee type of |
| 90 | /// the LLVM value is known: For example, it may not be a pointer to an |
| 91 | /// integer. |
| 92 | /// |
| 93 | /// If this returns a normal address, and if the lvalue's C type is fixed |
| 94 | /// size, this method guarantees that the returned pointer type will point to |
| 95 | /// an LLVM type of the same size of the lvalue's type. If the lvalue has a |
| 96 | /// variable length type, this is not possible. |
| 97 | /// |
| 98 | LValue CodeGenFunction::EmitLValue(const Expr *E) { |
| 99 | switch (E->getStmtClass()) { |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 100 | default: return EmitUnsupportedLValue(E, "l-value expression"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 101 | |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 102 | case Expr::CallExprClass: return EmitCallExprLValue(cast<CallExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 103 | case Expr::DeclRefExprClass: return EmitDeclRefLValue(cast<DeclRefExpr>(E)); |
| 104 | case Expr::ParenExprClass:return EmitLValue(cast<ParenExpr>(E)->getSubExpr()); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 105 | case Expr::PredefinedExprClass: |
| 106 | return EmitPredefinedLValue(cast<PredefinedExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 107 | case Expr::StringLiteralClass: |
| 108 | return EmitStringLiteralLValue(cast<StringLiteral>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 109 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 110 | case Expr::ObjCMessageExprClass: |
| 111 | return EmitObjCMessageExprLValue(cast<ObjCMessageExpr>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 112 | case Expr::ObjCIvarRefExprClass: |
| 113 | return EmitObjCIvarRefLValue(cast<ObjCIvarRefExpr>(E)); |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 114 | case Expr::ObjCPropertyRefExprClass: |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 115 | return EmitObjCPropertyRefLValue(cast<ObjCPropertyRefExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 116 | |
| 117 | case Expr::UnaryOperatorClass: |
| 118 | return EmitUnaryOpLValue(cast<UnaryOperator>(E)); |
| 119 | case Expr::ArraySubscriptExprClass: |
| 120 | return EmitArraySubscriptExpr(cast<ArraySubscriptExpr>(E)); |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 121 | case Expr::ExtVectorElementExprClass: |
| 122 | return EmitExtVectorElementExpr(cast<ExtVectorElementExpr>(E)); |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 123 | case Expr::MemberExprClass: return EmitMemberExpr(cast<MemberExpr>(E)); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 124 | case Expr::CompoundLiteralExprClass: |
| 125 | return EmitCompoundLiteralLValue(cast<CompoundLiteralExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 126 | } |
| 127 | } |
| 128 | |
| 129 | /// EmitLoadOfLValue - Given an expression that represents a value lvalue, |
| 130 | /// this method emits the address of the lvalue, then loads the result as an |
| 131 | /// rvalue, returning the rvalue. |
| 132 | RValue CodeGenFunction::EmitLoadOfLValue(LValue LV, QualType ExprType) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 133 | if (LV.isSimple()) { |
| 134 | llvm::Value *Ptr = LV.getAddress(); |
| 135 | const llvm::Type *EltTy = |
| 136 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
| 137 | |
| 138 | // Simple scalar l-value. |
Dan Gohman | d79a726 | 2008-05-22 22:12:56 +0000 | [diff] [blame] | 139 | if (EltTy->isSingleValueType()) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 140 | llvm::Value *V = Builder.CreateLoad(Ptr, LV.isVolatileQualified(),"tmp"); |
Chris Lattner | 01e3c9e | 2008-01-30 07:01:17 +0000 | [diff] [blame] | 141 | |
| 142 | // Bool can have different representation in memory than in registers. |
| 143 | if (ExprType->isBooleanType()) { |
| 144 | if (V->getType() != llvm::Type::Int1Ty) |
| 145 | V = Builder.CreateTrunc(V, llvm::Type::Int1Ty, "tobool"); |
| 146 | } |
| 147 | |
| 148 | return RValue::get(V); |
| 149 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 150 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 151 | assert(ExprType->isFunctionType() && "Unknown scalar value"); |
| 152 | return RValue::get(Ptr); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | if (LV.isVectorElt()) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 156 | llvm::Value *Vec = Builder.CreateLoad(LV.getVectorAddr(), |
| 157 | LV.isVolatileQualified(), "tmp"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 158 | return RValue::get(Builder.CreateExtractElement(Vec, LV.getVectorIdx(), |
| 159 | "vecext")); |
| 160 | } |
Chris Lattner | 46ea8eb | 2007-08-03 00:16:29 +0000 | [diff] [blame] | 161 | |
| 162 | // If this is a reference to a subset of the elements of a vector, either |
| 163 | // shuffle the input or extract/insert them as appropriate. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 164 | if (LV.isExtVectorElt()) |
| 165 | return EmitLoadOfExtVectorElementLValue(LV, ExprType); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 166 | |
| 167 | if (LV.isBitfield()) |
| 168 | return EmitLoadOfBitfieldLValue(LV, ExprType); |
| 169 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 170 | if (LV.isPropertyRef()) |
| 171 | return EmitLoadOfPropertyRefLValue(LV, ExprType); |
| 172 | |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 173 | assert(0 && "Unknown LValue type!"); |
Chris Lattner | b1776cb | 2007-09-16 19:23:47 +0000 | [diff] [blame] | 174 | //an invalid RValue, but the assert will |
| 175 | //ensure that this point is never reached |
| 176 | return RValue(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 177 | } |
| 178 | |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 179 | RValue CodeGenFunction::EmitLoadOfBitfieldLValue(LValue LV, |
| 180 | QualType ExprType) { |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 181 | unsigned StartBit = LV.getBitfieldStartBit(); |
| 182 | unsigned BitfieldSize = LV.getBitfieldSize(); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 183 | llvm::Value *Ptr = LV.getBitfieldAddr(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 184 | |
| 185 | const llvm::Type *EltTy = |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 186 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 187 | unsigned EltTySize = CGM.getTargetData().getTypeSizeInBits(EltTy); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 188 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 189 | // In some cases the bitfield may straddle two memory locations. |
| 190 | // Currently we load the entire bitfield, then do the magic to |
| 191 | // sign-extend it if necessary. This results in somewhat more code |
| 192 | // than necessary for the common case (one load), since two shifts |
| 193 | // accomplish both the masking and sign extension. |
| 194 | unsigned LowBits = std::min(BitfieldSize, EltTySize - StartBit); |
| 195 | llvm::Value *Val = Builder.CreateLoad(Ptr, LV.isVolatileQualified(), "tmp"); |
| 196 | |
| 197 | // Shift to proper location. |
| 198 | Val = Builder.CreateLShr(Val, llvm::ConstantInt::get(EltTy, StartBit), |
| 199 | "bf.lo"); |
| 200 | |
| 201 | // Mask off unused bits. |
| 202 | llvm::Constant *LowMask = |
| 203 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, LowBits)); |
| 204 | Val = Builder.CreateAnd(Val, LowMask, "bf.lo.cleared"); |
| 205 | |
| 206 | // Fetch the high bits if necessary. |
| 207 | if (LowBits < BitfieldSize) { |
| 208 | unsigned HighBits = BitfieldSize - LowBits; |
| 209 | llvm::Value *HighPtr = |
| 210 | Builder.CreateGEP(Ptr, llvm::ConstantInt::get(llvm::Type::Int32Ty, 1), |
| 211 | "bf.ptr.hi"); |
| 212 | llvm::Value *HighVal = Builder.CreateLoad(HighPtr, |
| 213 | LV.isVolatileQualified(), |
| 214 | "tmp"); |
| 215 | |
| 216 | // Mask off unused bits. |
| 217 | llvm::Constant *HighMask = |
| 218 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, HighBits)); |
| 219 | HighVal = Builder.CreateAnd(HighVal, HighMask, "bf.lo.cleared"); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 220 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 221 | // Shift to proper location and or in to bitfield value. |
| 222 | HighVal = Builder.CreateShl(HighVal, |
| 223 | llvm::ConstantInt::get(EltTy, LowBits)); |
| 224 | Val = Builder.CreateOr(Val, HighVal, "bf.val"); |
| 225 | } |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 226 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 227 | // Sign extend if necessary. |
| 228 | if (LV.isBitfieldSigned()) { |
| 229 | llvm::Value *ExtraBits = llvm::ConstantInt::get(EltTy, |
| 230 | EltTySize - BitfieldSize); |
| 231 | Val = Builder.CreateAShr(Builder.CreateShl(Val, ExtraBits), |
| 232 | ExtraBits, "bf.val.sext"); |
| 233 | } |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 234 | |
| 235 | // The bitfield type and the normal type differ when the storage sizes |
| 236 | // differ (currently just _Bool). |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 237 | Val = Builder.CreateIntCast(Val, ConvertType(ExprType), false, "tmp"); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 238 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 239 | return RValue::get(Val); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 240 | } |
| 241 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 242 | RValue CodeGenFunction::EmitLoadOfPropertyRefLValue(LValue LV, |
| 243 | QualType ExprType) { |
| 244 | return EmitObjCPropertyGet(LV.getPropertyRefExpr()); |
| 245 | } |
| 246 | |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 247 | // If this is a reference to a subset of the elements of a vector, either |
| 248 | // shuffle the input or extract/insert them as appropriate. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 249 | RValue CodeGenFunction::EmitLoadOfExtVectorElementLValue(LValue LV, |
| 250 | QualType ExprType) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 251 | llvm::Value *Vec = Builder.CreateLoad(LV.getExtVectorAddr(), |
| 252 | LV.isVolatileQualified(), "tmp"); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 253 | |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 254 | const llvm::Constant *Elts = LV.getExtVectorElts(); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 255 | |
| 256 | // If the result of the expression is a non-vector type, we must be |
| 257 | // extracting a single element. Just codegen as an extractelement. |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 258 | const VectorType *ExprVT = ExprType->getAsVectorType(); |
| 259 | if (!ExprVT) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 260 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 261 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx); |
| 262 | return RValue::get(Builder.CreateExtractElement(Vec, Elt, "tmp")); |
| 263 | } |
| 264 | |
| 265 | // If the source and destination have the same number of elements, use a |
| 266 | // vector shuffle instead of insert/extracts. |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 267 | unsigned NumResultElts = ExprVT->getNumElements(); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 268 | unsigned NumSourceElts = |
| 269 | cast<llvm::VectorType>(Vec->getType())->getNumElements(); |
| 270 | |
| 271 | if (NumResultElts == NumSourceElts) { |
| 272 | llvm::SmallVector<llvm::Constant*, 4> Mask; |
| 273 | for (unsigned i = 0; i != NumResultElts; ++i) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 274 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 275 | Mask.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx)); |
| 276 | } |
| 277 | |
| 278 | llvm::Value *MaskV = llvm::ConstantVector::get(&Mask[0], Mask.size()); |
| 279 | Vec = Builder.CreateShuffleVector(Vec, |
| 280 | llvm::UndefValue::get(Vec->getType()), |
| 281 | MaskV, "tmp"); |
| 282 | return RValue::get(Vec); |
| 283 | } |
| 284 | |
| 285 | // Start out with an undef of the result type. |
| 286 | llvm::Value *Result = llvm::UndefValue::get(ConvertType(ExprType)); |
| 287 | |
| 288 | // Extract/Insert each element of the result. |
| 289 | for (unsigned i = 0; i != NumResultElts; ++i) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 290 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 291 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx); |
| 292 | Elt = Builder.CreateExtractElement(Vec, Elt, "tmp"); |
| 293 | |
| 294 | llvm::Value *OutIdx = llvm::ConstantInt::get(llvm::Type::Int32Ty, i); |
| 295 | Result = Builder.CreateInsertElement(Result, Elt, OutIdx, "tmp"); |
| 296 | } |
| 297 | |
| 298 | return RValue::get(Result); |
| 299 | } |
| 300 | |
| 301 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 302 | |
| 303 | /// EmitStoreThroughLValue - Store the specified rvalue into the specified |
| 304 | /// lvalue, where both are guaranteed to the have the same type, and that type |
| 305 | /// is 'Ty'. |
| 306 | void CodeGenFunction::EmitStoreThroughLValue(RValue Src, LValue Dst, |
| 307 | QualType Ty) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 308 | if (!Dst.isSimple()) { |
| 309 | if (Dst.isVectorElt()) { |
| 310 | // Read/modify/write the vector, inserting the new element. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 311 | llvm::Value *Vec = Builder.CreateLoad(Dst.getVectorAddr(), |
| 312 | Dst.isVolatileQualified(), "tmp"); |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 313 | Vec = Builder.CreateInsertElement(Vec, Src.getScalarVal(), |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 314 | Dst.getVectorIdx(), "vecins"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 315 | Builder.CreateStore(Vec, Dst.getVectorAddr(),Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 316 | return; |
| 317 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 318 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 319 | // If this is an update of extended vector elements, insert them as |
| 320 | // appropriate. |
| 321 | if (Dst.isExtVectorElt()) |
| 322 | return EmitStoreThroughExtVectorComponentLValue(Src, Dst, Ty); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 323 | |
| 324 | if (Dst.isBitfield()) |
| 325 | return EmitStoreThroughBitfieldLValue(Src, Dst, Ty); |
| 326 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 327 | if (Dst.isPropertyRef()) |
| 328 | return EmitStoreThroughPropertyRefLValue(Src, Dst, Ty); |
| 329 | |
Lauro Ramos Venancio | 6553982 | 2008-01-22 22:38:35 +0000 | [diff] [blame] | 330 | assert(0 && "Unknown LValue type"); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 331 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 332 | |
| 333 | llvm::Value *DstAddr = Dst.getAddress(); |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 334 | assert(Src.isScalar() && "Can't emit an agg store with this method"); |
| 335 | // FIXME: Handle volatility etc. |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 336 | const llvm::Type *SrcTy = Src.getScalarVal()->getType(); |
Christopher Lamb | ddc23f3 | 2007-12-17 01:11:20 +0000 | [diff] [blame] | 337 | const llvm::PointerType *DstPtr = cast<llvm::PointerType>(DstAddr->getType()); |
| 338 | const llvm::Type *AddrTy = DstPtr->getElementType(); |
| 339 | unsigned AS = DstPtr->getAddressSpace(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 340 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 341 | if (AddrTy != SrcTy) |
Christopher Lamb | ddc23f3 | 2007-12-17 01:11:20 +0000 | [diff] [blame] | 342 | DstAddr = Builder.CreateBitCast(DstAddr, |
| 343 | llvm::PointerType::get(SrcTy, AS), |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 344 | "storetmp"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 345 | Builder.CreateStore(Src.getScalarVal(), DstAddr, Dst.isVolatileQualified()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 346 | } |
| 347 | |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 348 | void CodeGenFunction::EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, |
| 349 | QualType Ty) { |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 350 | unsigned StartBit = Dst.getBitfieldStartBit(); |
| 351 | unsigned BitfieldSize = Dst.getBitfieldSize(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 352 | llvm::Value *Ptr = Dst.getBitfieldAddr(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 353 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 354 | const llvm::Type *EltTy = |
| 355 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
| 356 | unsigned EltTySize = CGM.getTargetData().getTypeSizeInBits(EltTy); |
| 357 | |
| 358 | // Get the new value, cast to the appropriate type and masked to |
| 359 | // exactly the size of the bit-field. |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 360 | llvm::Value *NewVal = Src.getScalarVal(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 361 | NewVal = Builder.CreateIntCast(NewVal, EltTy, false, "tmp"); |
| 362 | llvm::Constant *Mask = |
| 363 | llvm::ConstantInt::get(llvm::APInt::getLowBitsSet(EltTySize, BitfieldSize)); |
| 364 | NewVal = Builder.CreateAnd(NewVal, Mask, "bf.value"); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 365 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 366 | // In some cases the bitfield may straddle two memory locations. |
| 367 | // Emit the low part first and check to see if the high needs to be |
| 368 | // done. |
| 369 | unsigned LowBits = std::min(BitfieldSize, EltTySize - StartBit); |
| 370 | llvm::Value *LowVal = Builder.CreateLoad(Ptr, Dst.isVolatileQualified(), |
| 371 | "bf.prev.low"); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 372 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 373 | // Compute the mask for zero-ing the low part of this bitfield. |
| 374 | llvm::Constant *InvMask = |
| 375 | llvm::ConstantInt::get(~llvm::APInt::getBitsSet(EltTySize, StartBit, |
| 376 | StartBit + LowBits)); |
| 377 | |
| 378 | // Compute the new low part as |
| 379 | // LowVal = (LowVal & InvMask) | (NewVal << StartBit), |
| 380 | // with the shift of NewVal implicitly stripping the high bits. |
| 381 | llvm::Value *NewLowVal = |
| 382 | Builder.CreateShl(NewVal, llvm::ConstantInt::get(EltTy, StartBit), |
| 383 | "bf.value.lo"); |
| 384 | LowVal = Builder.CreateAnd(LowVal, InvMask, "bf.prev.lo.cleared"); |
| 385 | LowVal = Builder.CreateOr(LowVal, NewLowVal, "bf.new.lo"); |
| 386 | |
| 387 | // Write back. |
| 388 | Builder.CreateStore(LowVal, Ptr, Dst.isVolatileQualified()); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 389 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 390 | // If the low part doesn't cover the bitfield emit a high part. |
| 391 | if (LowBits < BitfieldSize) { |
| 392 | unsigned HighBits = BitfieldSize - LowBits; |
| 393 | llvm::Value *HighPtr = |
| 394 | Builder.CreateGEP(Ptr, llvm::ConstantInt::get(llvm::Type::Int32Ty, 1), |
| 395 | "bf.ptr.hi"); |
| 396 | llvm::Value *HighVal = Builder.CreateLoad(HighPtr, |
| 397 | Dst.isVolatileQualified(), |
| 398 | "bf.prev.hi"); |
| 399 | |
| 400 | // Compute the mask for zero-ing the high part of this bitfield. |
| 401 | llvm::Constant *InvMask = |
| 402 | llvm::ConstantInt::get(~llvm::APInt::getLowBitsSet(EltTySize, HighBits)); |
| 403 | |
| 404 | // Compute the new high part as |
| 405 | // HighVal = (HighVal & InvMask) | (NewVal lshr LowBits), |
| 406 | // where the high bits of NewVal have already been cleared and the |
| 407 | // shift stripping the low bits. |
| 408 | llvm::Value *NewHighVal = |
| 409 | Builder.CreateLShr(NewVal, llvm::ConstantInt::get(EltTy, LowBits), |
| 410 | "bf.value.high"); |
| 411 | HighVal = Builder.CreateAnd(HighVal, InvMask, "bf.prev.hi.cleared"); |
| 412 | HighVal = Builder.CreateOr(HighVal, NewHighVal, "bf.new.hi"); |
| 413 | |
| 414 | // Write back. |
| 415 | Builder.CreateStore(HighVal, HighPtr, Dst.isVolatileQualified()); |
| 416 | } |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 417 | } |
| 418 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 419 | void CodeGenFunction::EmitStoreThroughPropertyRefLValue(RValue Src, |
| 420 | LValue Dst, |
| 421 | QualType Ty) { |
| 422 | EmitObjCPropertySet(Dst.getPropertyRefExpr(), Src); |
| 423 | } |
| 424 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 425 | void CodeGenFunction::EmitStoreThroughExtVectorComponentLValue(RValue Src, |
| 426 | LValue Dst, |
| 427 | QualType Ty) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 428 | // This access turns into a read/modify/write of the vector. Load the input |
| 429 | // value now. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 430 | llvm::Value *Vec = Builder.CreateLoad(Dst.getExtVectorAddr(), |
| 431 | Dst.isVolatileQualified(), "tmp"); |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 432 | const llvm::Constant *Elts = Dst.getExtVectorElts(); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 433 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 434 | llvm::Value *SrcVal = Src.getScalarVal(); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 435 | |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 436 | if (const VectorType *VTy = Ty->getAsVectorType()) { |
| 437 | unsigned NumSrcElts = VTy->getNumElements(); |
| 438 | |
| 439 | // Extract/Insert each element. |
| 440 | for (unsigned i = 0; i != NumSrcElts; ++i) { |
| 441 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, i); |
| 442 | Elt = Builder.CreateExtractElement(SrcVal, Elt, "tmp"); |
| 443 | |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 444 | unsigned Idx = getAccessedFieldNo(i, Elts); |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 445 | llvm::Value *OutIdx = llvm::ConstantInt::get(llvm::Type::Int32Ty, Idx); |
| 446 | Vec = Builder.CreateInsertElement(Vec, Elt, OutIdx, "tmp"); |
| 447 | } |
| 448 | } else { |
| 449 | // 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] | 450 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 451 | llvm::Value *Elt = llvm::ConstantInt::get(llvm::Type::Int32Ty, InIdx); |
| 452 | Vec = Builder.CreateInsertElement(Vec, SrcVal, Elt, "tmp"); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 453 | } |
| 454 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 455 | Builder.CreateStore(Vec, Dst.getExtVectorAddr(), Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 456 | } |
| 457 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 458 | |
| 459 | LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 460 | const VarDecl *VD = dyn_cast<VarDecl>(E->getDecl()); |
| 461 | |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 462 | if (VD && (VD->isBlockVarDecl() || isa<ParmVarDecl>(VD) || |
| 463 | isa<ImplicitParamDecl>(VD))) { |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 464 | if (VD->getStorageClass() == VarDecl::Extern) |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 465 | return LValue::MakeAddr(CGM.GetAddrOfGlobalVar(VD), |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 466 | E->getType().getCVRQualifiers()); |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 467 | else { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 468 | llvm::Value *V = LocalDeclMap[VD]; |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 469 | assert(V && "BlockVarDecl not entered in LocalDeclMap?"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 470 | return LValue::MakeAddr(V, E->getType().getCVRQualifiers()); |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 471 | } |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 472 | } else if (VD && VD->isFileVarDecl()) { |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 473 | return LValue::MakeAddr(CGM.GetAddrOfGlobalVar(VD), |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 474 | E->getType().getCVRQualifiers()); |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 475 | } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(E->getDecl())) { |
Daniel Dunbar | bd012ff | 2008-07-29 23:18:29 +0000 | [diff] [blame] | 476 | return LValue::MakeAddr(CGM.GetAddrOfFunction(FD), |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 477 | E->getType().getCVRQualifiers()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 478 | } |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 479 | else if (const ImplicitParamDecl *IPD = |
| 480 | dyn_cast<ImplicitParamDecl>(E->getDecl())) { |
| 481 | llvm::Value *V = LocalDeclMap[IPD]; |
| 482 | assert(V && "BlockVarDecl not entered in LocalDeclMap?"); |
| 483 | return LValue::MakeAddr(V, E->getType().getCVRQualifiers()); |
| 484 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 485 | assert(0 && "Unimp declref"); |
Chris Lattner | b1776cb | 2007-09-16 19:23:47 +0000 | [diff] [blame] | 486 | //an invalid LValue, but the assert will |
| 487 | //ensure that this point is never reached. |
| 488 | return LValue(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | LValue CodeGenFunction::EmitUnaryOpLValue(const UnaryOperator *E) { |
| 492 | // __extension__ doesn't affect lvalue-ness. |
| 493 | if (E->getOpcode() == UnaryOperator::Extension) |
| 494 | return EmitLValue(E->getSubExpr()); |
| 495 | |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 496 | QualType ExprTy = getContext().getCanonicalType(E->getSubExpr()->getType()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 497 | switch (E->getOpcode()) { |
| 498 | default: assert(0 && "Unknown unary operator lvalue!"); |
| 499 | case UnaryOperator::Deref: |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 500 | return LValue::MakeAddr(EmitScalarExpr(E->getSubExpr()), |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 501 | ExprTy->getAsPointerType()->getPointeeType() |
| 502 | .getCVRQualifiers()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 503 | case UnaryOperator::Real: |
| 504 | case UnaryOperator::Imag: |
| 505 | LValue LV = EmitLValue(E->getSubExpr()); |
Chris Lattner | 36b6a0a | 2008-03-19 05:19:41 +0000 | [diff] [blame] | 506 | unsigned Idx = E->getOpcode() == UnaryOperator::Imag; |
| 507 | return LValue::MakeAddr(Builder.CreateStructGEP(LV.getAddress(), |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 508 | Idx, "idx"), |
| 509 | ExprTy.getCVRQualifiers()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 510 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | LValue CodeGenFunction::EmitStringLiteralLValue(const StringLiteral *E) { |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 514 | return LValue::MakeAddr(CGM.GetAddrOfConstantStringFromLiteral(E), 0); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 515 | } |
| 516 | |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 517 | LValue CodeGenFunction::EmitPredefinedLValue(const PredefinedExpr *E) { |
Chris Lattner | c8aa5f1 | 2008-04-04 04:07:35 +0000 | [diff] [blame] | 518 | std::string FunctionName; |
| 519 | if(const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurFuncDecl)) { |
| 520 | FunctionName = FD->getName(); |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 521 | } else if (isa<ObjCMethodDecl>(CurFuncDecl)) { |
| 522 | // Just get the mangled name. |
| 523 | FunctionName = CurFn->getName(); |
| 524 | } else { |
| 525 | return EmitUnsupportedLValue(E, "predefined expression"); |
Chris Lattner | c8aa5f1 | 2008-04-04 04:07:35 +0000 | [diff] [blame] | 526 | } |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 527 | std::string GlobalVarName; |
| 528 | |
| 529 | switch (E->getIdentType()) { |
| 530 | default: |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 531 | return EmitUnsupportedLValue(E, "predefined expression"); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 532 | case PredefinedExpr::Func: |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 533 | GlobalVarName = "__func__."; |
| 534 | break; |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 535 | case PredefinedExpr::Function: |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 536 | GlobalVarName = "__FUNCTION__."; |
| 537 | break; |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 538 | case PredefinedExpr::PrettyFunction: |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 539 | // FIXME:: Demangle C++ method names |
| 540 | GlobalVarName = "__PRETTY_FUNCTION__."; |
| 541 | break; |
| 542 | } |
| 543 | |
Chris Lattner | c8aa5f1 | 2008-04-04 04:07:35 +0000 | [diff] [blame] | 544 | GlobalVarName += FunctionName; |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 545 | |
| 546 | // FIXME: Can cache/reuse these within the module. |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 547 | llvm::Constant *C = llvm::ConstantArray::get(FunctionName); |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 548 | |
| 549 | // Create a global variable for this. |
| 550 | C = new llvm::GlobalVariable(C->getType(), true, |
| 551 | llvm::GlobalValue::InternalLinkage, |
| 552 | C, GlobalVarName, CurFn->getParent()); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 553 | return LValue::MakeAddr(C,0); |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 554 | } |
| 555 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 556 | LValue CodeGenFunction::EmitArraySubscriptExpr(const ArraySubscriptExpr *E) { |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 557 | // 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] | 558 | llvm::Value *Idx = EmitScalarExpr(E->getIdx()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 559 | |
| 560 | // If the base is a vector type, then we are forming a vector element lvalue |
| 561 | // with this subscript. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 562 | if (E->getBase()->getType()->isVectorType()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 563 | // Emit the vector as an lvalue to get its address. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 564 | LValue LHS = EmitLValue(E->getBase()); |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 565 | assert(LHS.isSimple() && "Can only subscript lvalue vectors here!"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 566 | // FIXME: This should properly sign/zero/extend or truncate Idx to i32. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 567 | return LValue::MakeVectorElt(LHS.getAddress(), Idx, |
| 568 | E->getBase()->getType().getCVRQualifiers()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 569 | } |
| 570 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 571 | // 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] | 572 | llvm::Value *Base = EmitScalarExpr(E->getBase()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 573 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 574 | // Extend or truncate the index type to 32 or 64-bits. |
Chris Lattner | d4f0802 | 2007-08-08 17:43:05 +0000 | [diff] [blame] | 575 | QualType IdxTy = E->getIdx()->getType(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 576 | bool IdxSigned = IdxTy->isSignedIntegerType(); |
| 577 | unsigned IdxBitwidth = cast<llvm::IntegerType>(Idx->getType())->getBitWidth(); |
| 578 | if (IdxBitwidth != LLVMPointerWidth) |
| 579 | Idx = Builder.CreateIntCast(Idx, llvm::IntegerType::get(LLVMPointerWidth), |
| 580 | IdxSigned, "idxprom"); |
| 581 | |
| 582 | // We know that the pointer points to a type of the correct size, unless the |
| 583 | // size is a VLA. |
Eli Friedman | 3c2b317 | 2008-02-15 12:20:59 +0000 | [diff] [blame] | 584 | if (!E->getType()->isConstantSizeType()) |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 585 | return EmitUnsupportedLValue(E, "VLA index"); |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 586 | QualType ExprTy = getContext().getCanonicalType(E->getBase()->getType()); |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 587 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 588 | return LValue::MakeAddr(Builder.CreateGEP(Base, Idx, "arrayidx"), |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 589 | ExprTy->getAsPointerType()->getPointeeType() |
| 590 | .getCVRQualifiers()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 591 | } |
| 592 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 593 | static |
| 594 | llvm::Constant *GenerateConstantVector(llvm::SmallVector<unsigned, 4> &Elts) { |
| 595 | llvm::SmallVector<llvm::Constant *, 4> CElts; |
| 596 | |
| 597 | for (unsigned i = 0, e = Elts.size(); i != e; ++i) |
| 598 | CElts.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, Elts[i])); |
| 599 | |
| 600 | return llvm::ConstantVector::get(&CElts[0], CElts.size()); |
| 601 | } |
| 602 | |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 603 | LValue CodeGenFunction:: |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 604 | EmitExtVectorElementExpr(const ExtVectorElementExpr *E) { |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 605 | // Emit the base vector as an l-value. |
| 606 | LValue Base = EmitLValue(E->getBase()); |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 607 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 608 | // Encode the element access list into a vector of unsigned indices. |
| 609 | llvm::SmallVector<unsigned, 4> Indices; |
| 610 | E->getEncodedElementAccess(Indices); |
| 611 | |
| 612 | if (Base.isSimple()) { |
| 613 | llvm::Constant *CV = GenerateConstantVector(Indices); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 614 | return LValue::MakeExtVectorElt(Base.getAddress(), CV, |
| 615 | E->getBase()->getType().getCVRQualifiers()); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 616 | } |
| 617 | assert(Base.isExtVectorElt() && "Can only subscript lvalue vec elts here!"); |
| 618 | |
| 619 | llvm::Constant *BaseElts = Base.getExtVectorElts(); |
| 620 | llvm::SmallVector<llvm::Constant *, 4> CElts; |
| 621 | |
| 622 | for (unsigned i = 0, e = Indices.size(); i != e; ++i) { |
| 623 | if (isa<llvm::ConstantAggregateZero>(BaseElts)) |
| 624 | CElts.push_back(llvm::ConstantInt::get(llvm::Type::Int32Ty, 0)); |
| 625 | else |
| 626 | CElts.push_back(BaseElts->getOperand(Indices[i])); |
| 627 | } |
| 628 | llvm::Constant *CV = llvm::ConstantVector::get(&CElts[0], CElts.size()); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 629 | return LValue::MakeExtVectorElt(Base.getExtVectorAddr(), CV, |
| 630 | E->getBase()->getType().getCVRQualifiers()); |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 631 | } |
| 632 | |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 633 | LValue CodeGenFunction::EmitMemberExpr(const MemberExpr *E) { |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 634 | bool isUnion = false; |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 635 | Expr *BaseExpr = E->getBase(); |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 636 | llvm::Value *BaseValue = NULL; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 637 | unsigned CVRQualifiers=0; |
| 638 | |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 639 | // 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] | 640 | if (E->isArrow()) { |
Devang Patel | 0a96118 | 2007-10-26 18:15:21 +0000 | [diff] [blame] | 641 | BaseValue = EmitScalarExpr(BaseExpr); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 642 | const PointerType *PTy = |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 643 | cast<PointerType>(getContext().getCanonicalType(BaseExpr->getType())); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 644 | if (PTy->getPointeeType()->isUnionType()) |
| 645 | isUnion = true; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 646 | CVRQualifiers = PTy->getPointeeType().getCVRQualifiers(); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 647 | } |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 648 | else { |
| 649 | LValue BaseLV = EmitLValue(BaseExpr); |
| 650 | // FIXME: this isn't right for bitfields. |
| 651 | BaseValue = BaseLV.getAddress(); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 652 | if (BaseExpr->getType()->isUnionType()) |
| 653 | isUnion = true; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 654 | CVRQualifiers = BaseExpr->getType().getCVRQualifiers(); |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 655 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 656 | |
| 657 | FieldDecl *Field = E->getMemberDecl(); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 658 | return EmitLValueForField(BaseValue, Field, isUnion, CVRQualifiers); |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 659 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 660 | |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 661 | LValue CodeGenFunction::EmitLValueForField(llvm::Value* BaseValue, |
| 662 | FieldDecl* Field, |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 663 | bool isUnion, |
| 664 | unsigned CVRQualifiers) |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 665 | { |
| 666 | llvm::Value *V; |
| 667 | unsigned idx = CGM.getTypes().getLLVMFieldNo(Field); |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 668 | |
Eli Friedman | 1e86b34 | 2008-05-29 11:33:25 +0000 | [diff] [blame] | 669 | if (Field->isBitField()) { |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 670 | // FIXME: CodeGenTypes should expose a method to get the appropriate |
| 671 | // type for FieldTy (the appropriate type is ABI-dependent). |
Eli Friedman | bfe08e0 | 2008-06-01 15:16:01 +0000 | [diff] [blame] | 672 | const llvm::Type *FieldTy = CGM.getTypes().ConvertTypeForMem(Field->getType()); |
Chris Lattner | 36b6a0a | 2008-03-19 05:19:41 +0000 | [diff] [blame] | 673 | const llvm::PointerType *BaseTy = |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 674 | cast<llvm::PointerType>(BaseValue->getType()); |
| 675 | unsigned AS = BaseTy->getAddressSpace(); |
| 676 | BaseValue = Builder.CreateBitCast(BaseValue, |
| 677 | llvm::PointerType::get(FieldTy, AS), |
| 678 | "tmp"); |
| 679 | V = Builder.CreateGEP(BaseValue, |
| 680 | llvm::ConstantInt::get(llvm::Type::Int32Ty, idx), |
| 681 | "tmp"); |
Eli Friedman | 1e86b34 | 2008-05-29 11:33:25 +0000 | [diff] [blame] | 682 | |
| 683 | CodeGenTypes::BitFieldInfo bitFieldInfo = |
| 684 | CGM.getTypes().getBitFieldInfo(Field); |
| 685 | return LValue::MakeBitfield(V, bitFieldInfo.Begin, bitFieldInfo.Size, |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 686 | Field->getType()->isSignedIntegerType(), |
| 687 | Field->getType().getCVRQualifiers()|CVRQualifiers); |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 688 | } |
Eli Friedman | bfe08e0 | 2008-06-01 15:16:01 +0000 | [diff] [blame] | 689 | |
Eli Friedman | 1e86b34 | 2008-05-29 11:33:25 +0000 | [diff] [blame] | 690 | V = Builder.CreateStructGEP(BaseValue, idx, "tmp"); |
| 691 | |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 692 | // Match union field type. |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 693 | if (isUnion) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 694 | const llvm::Type *FieldTy = |
| 695 | CGM.getTypes().ConvertTypeForMem(Field->getType()); |
Devang Patel | e9b8c0a | 2007-10-30 20:59:40 +0000 | [diff] [blame] | 696 | const llvm::PointerType * BaseTy = |
| 697 | cast<llvm::PointerType>(BaseValue->getType()); |
Eli Friedman | 788d571 | 2008-05-21 13:24:44 +0000 | [diff] [blame] | 698 | unsigned AS = BaseTy->getAddressSpace(); |
| 699 | V = Builder.CreateBitCast(V, |
| 700 | llvm::PointerType::get(FieldTy, AS), |
| 701 | "tmp"); |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 702 | } |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 703 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 704 | return LValue::MakeAddr(V, |
| 705 | Field->getType().getCVRQualifiers()|CVRQualifiers); |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 706 | } |
| 707 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 708 | LValue CodeGenFunction::EmitCompoundLiteralLValue(const CompoundLiteralExpr* E) |
| 709 | { |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 710 | const llvm::Type *LTy = ConvertType(E->getType()); |
| 711 | llvm::Value *DeclPtr = CreateTempAlloca(LTy, ".compoundliteral"); |
| 712 | |
| 713 | const Expr* InitExpr = E->getInitializer(); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 714 | LValue Result = LValue::MakeAddr(DeclPtr, E->getType().getCVRQualifiers()); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 715 | |
| 716 | if (E->getType()->isComplexType()) { |
| 717 | EmitComplexExprIntoAddr(InitExpr, DeclPtr, false); |
| 718 | } else if (hasAggregateLLVMType(E->getType())) { |
| 719 | EmitAnyExpr(InitExpr, DeclPtr, false); |
| 720 | } else { |
| 721 | EmitStoreThroughLValue(EmitAnyExpr(InitExpr), Result, E->getType()); |
| 722 | } |
| 723 | |
| 724 | return Result; |
| 725 | } |
| 726 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 727 | //===--------------------------------------------------------------------===// |
| 728 | // Expression Emission |
| 729 | //===--------------------------------------------------------------------===// |
| 730 | |
Chris Lattner | 7016a70 | 2007-08-20 22:37:10 +0000 | [diff] [blame] | 731 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 732 | RValue CodeGenFunction::EmitCallExpr(const CallExpr *E) { |
Anders Carlsson | 022012e | 2007-08-20 18:05:56 +0000 | [diff] [blame] | 733 | if (const ImplicitCastExpr *IcExpr = |
| 734 | dyn_cast<const ImplicitCastExpr>(E->getCallee())) |
| 735 | if (const DeclRefExpr *DRExpr = |
| 736 | dyn_cast<const DeclRefExpr>(IcExpr->getSubExpr())) |
| 737 | if (const FunctionDecl *FDecl = |
| 738 | dyn_cast<const FunctionDecl>(DRExpr->getDecl())) |
| 739 | if (unsigned builtinID = FDecl->getIdentifier()->getBuiltinID()) |
| 740 | return EmitBuiltinExpr(builtinID, E); |
| 741 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 742 | llvm::Value *Callee = EmitScalarExpr(E->getCallee()); |
Eli Friedman | 5193b8a | 2008-01-30 01:32:06 +0000 | [diff] [blame] | 743 | return EmitCallExpr(Callee, E->getCallee()->getType(), |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 744 | E->arg_begin(), E->arg_end()); |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 745 | } |
| 746 | |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 747 | RValue CodeGenFunction::EmitCallExpr(Expr *FnExpr, |
| 748 | CallExpr::const_arg_iterator ArgBeg, |
| 749 | CallExpr::const_arg_iterator ArgEnd) { |
| 750 | |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 751 | llvm::Value *Callee = EmitScalarExpr(FnExpr); |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 752 | return EmitCallExpr(Callee, FnExpr->getType(), ArgBeg, ArgEnd); |
Chris Lattner | c5e940f | 2007-08-31 04:44:06 +0000 | [diff] [blame] | 753 | } |
| 754 | |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 755 | LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E) { |
| 756 | // Can only get l-value for call expression returning aggregate type |
| 757 | RValue RV = EmitCallExpr(E); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 758 | // FIXME: can this be volatile? |
| 759 | return LValue::MakeAddr(RV.getAggregateAddr(), |
| 760 | E->getType().getCVRQualifiers()); |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 761 | } |
| 762 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 763 | LValue CodeGenFunction::EmitObjCMessageExprLValue(const ObjCMessageExpr *E) { |
| 764 | // Can only get l-value for message expression returning aggregate type |
| 765 | RValue RV = EmitObjCMessageExpr(E); |
| 766 | // FIXME: can this be volatile? |
| 767 | return LValue::MakeAddr(RV.getAggregateAddr(), |
| 768 | E->getType().getCVRQualifiers()); |
| 769 | } |
| 770 | |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 771 | LValue CodeGenFunction::EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E) { |
| 772 | // Objective-C objects are traditionally C structures with their layout |
| 773 | // defined at compile-time. In some implementations, their layout is not |
| 774 | // defined until run time in order to allow instance variables to be added to |
| 775 | // a class without recompiling all of the subclasses. If this is the case |
| 776 | // then the CGObjCRuntime subclass must return true to LateBoundIvars and |
| 777 | // implement the lookup itself. |
Daniel Dunbar | 208ff5e | 2008-08-11 18:12:00 +0000 | [diff] [blame] | 778 | if (CGM.getObjCRuntime().LateBoundIVars()) { |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 779 | return EmitUnsupportedLValue(E, "late-bound instance variables"); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 780 | } |
Chris Lattner | c8aa5f1 | 2008-04-04 04:07:35 +0000 | [diff] [blame] | 781 | |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 782 | // FIXME: A lot of the code below could be shared with EmitMemberExpr. |
| 783 | llvm::Value *BaseValue = 0; |
| 784 | const Expr *BaseExpr = E->getBase(); |
| 785 | unsigned CVRQualifiers = 0; |
| 786 | if (E->isArrow()) { |
| 787 | BaseValue = EmitScalarExpr(BaseExpr); |
| 788 | const PointerType *PTy = |
| 789 | cast<PointerType>(getContext().getCanonicalType(BaseExpr->getType())); |
| 790 | CVRQualifiers = PTy->getPointeeType().getCVRQualifiers(); |
| 791 | } else { |
| 792 | LValue BaseLV = EmitLValue(BaseExpr); |
| 793 | // FIXME: this isn't right for bitfields. |
| 794 | BaseValue = BaseLV.getAddress(); |
| 795 | CVRQualifiers = BaseExpr->getType().getCVRQualifiers(); |
| 796 | } |
Chris Lattner | ce5605e | 2008-03-30 23:25:33 +0000 | [diff] [blame] | 797 | |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 798 | const ObjCIvarDecl *Field = E->getDecl(); |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 799 | if (Field->isBitField()) |
| 800 | return EmitUnsupportedLValue(E, "ivar bitfields"); |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 801 | |
| 802 | // TODO: Add a special case for isa (index 0) |
| 803 | unsigned Index = CGM.getTypes().getLLVMFieldNo(Field); |
| 804 | |
| 805 | llvm::Value *V = Builder.CreateStructGEP(BaseValue, Index, "tmp"); |
| 806 | return LValue::MakeAddr(V, |
| 807 | Field->getType().getCVRQualifiers()|CVRQualifiers); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 808 | } |
| 809 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 810 | LValue |
| 811 | CodeGenFunction::EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E) { |
| 812 | // This is a special l-value that just issues sends when we load or |
| 813 | // store through it. |
| 814 | return LValue::MakePropertyRef(E, E->getType().getCVRQualifiers()); |
| 815 | } |
| 816 | |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 817 | RValue CodeGenFunction::EmitCallExpr(llvm::Value *Callee, QualType FnType, |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 818 | CallExpr::const_arg_iterator ArgBeg, |
| 819 | CallExpr::const_arg_iterator ArgEnd) { |
| 820 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 821 | // The callee type will always be a pointer to function type, get the function |
| 822 | // type. |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 823 | FnType = FnType->getAsPointerType()->getPointeeType(); |
Chris Lattner | 05d2fb4 | 2008-07-31 04:58:58 +0000 | [diff] [blame] | 824 | QualType ResultType = FnType->getAsFunctionType()->getResultType(); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 825 | |
| 826 | CallArgList Args; |
| 827 | for (CallExpr::const_arg_iterator I = ArgBeg; I != ArgEnd; ++I) |
| 828 | EmitCallArg(*I, Args); |
| 829 | |
| 830 | return EmitCall(Callee, ResultType, Args); |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 831 | } |
Eli Friedman | 5193b8a | 2008-01-30 01:32:06 +0000 | [diff] [blame] | 832 | |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 833 | void CodeGenFunction::EmitCallArg(const Expr *E, CallArgList &Args) { |
| 834 | QualType ArgTy = E->getType(); |
| 835 | llvm::Value *ArgValue; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 836 | |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 837 | if (!hasAggregateLLVMType(ArgTy)) { |
| 838 | // Scalar argument is passed by-value. |
| 839 | ArgValue = EmitScalarExpr(E); |
| 840 | } else if (ArgTy->isAnyComplexType()) { |
| 841 | // Make a temporary alloca to pass the argument. |
| 842 | ArgValue = CreateTempAlloca(ConvertType(ArgTy)); |
| 843 | EmitComplexExprIntoAddr(E, ArgValue, false); |
| 844 | } else { |
| 845 | ArgValue = CreateTempAlloca(ConvertType(ArgTy)); |
| 846 | EmitAggExpr(E, ArgValue, false); |
| 847 | } |
| 848 | |
| 849 | Args.push_back(std::make_pair(ArgValue, E->getType())); |
| 850 | } |
| 851 | |
| 852 | RValue CodeGenFunction::EmitCall(llvm::Value *Callee, |
| 853 | QualType ResultType, |
| 854 | const CallArgList &CallArgs) { |
| 855 | llvm::SmallVector<llvm::Value*, 16> Args; |
| 856 | llvm::Value *TempArg0 = 0; |
| 857 | |
Chris Lattner | cc666af | 2007-08-10 17:02:28 +0000 | [diff] [blame] | 858 | // Handle struct-return functions by passing a pointer to the location that |
| 859 | // we would like to return into. |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 860 | if (hasAggregateLLVMType(ResultType)) { |
Chris Lattner | cc666af | 2007-08-10 17:02:28 +0000 | [diff] [blame] | 861 | // Create a temporary alloca to hold the result of the call. :( |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 862 | TempArg0 = CreateTempAlloca(ConvertType(ResultType)); |
| 863 | Args.push_back(TempArg0); |
Chris Lattner | cc666af | 2007-08-10 17:02:28 +0000 | [diff] [blame] | 864 | } |
| 865 | |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 866 | for (CallArgList::const_iterator I = CallArgs.begin(), E = CallArgs.end(); |
| 867 | I != E; ++I) |
| 868 | Args.push_back(I->first); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 869 | |
Nate Begeman | ec9426c | 2008-03-09 03:09:36 +0000 | [diff] [blame] | 870 | llvm::CallInst *CI = Builder.CreateCall(Callee,&Args[0],&Args[0]+Args.size()); |
Eli Friedman | ff4a2d9 | 2008-06-01 15:54:49 +0000 | [diff] [blame] | 871 | |
| 872 | // Note that there is parallel code in SetFunctionAttributes in CodeGenModule |
| 873 | llvm::SmallVector<llvm::ParamAttrsWithIndex, 8> ParamAttrList; |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 874 | unsigned Index = 1; |
| 875 | if (TempArg0) { |
Eli Friedman | ff4a2d9 | 2008-06-01 15:54:49 +0000 | [diff] [blame] | 876 | ParamAttrList.push_back( |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 877 | llvm::ParamAttrsWithIndex::get(Index, llvm::ParamAttr::StructRet)); |
| 878 | ++Index; |
| 879 | } |
| 880 | |
| 881 | for (CallArgList::const_iterator I = CallArgs.begin(), E = CallArgs.end(); |
| 882 | I != E; ++I, ++Index) { |
| 883 | QualType ParamType = I->second; |
Eli Friedman | ff4a2d9 | 2008-06-01 15:54:49 +0000 | [diff] [blame] | 884 | unsigned ParamAttrs = 0; |
| 885 | if (ParamType->isRecordType()) |
| 886 | ParamAttrs |= llvm::ParamAttr::ByVal; |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 887 | if (ParamType->isPromotableIntegerType()) { |
| 888 | if (ParamType->isSignedIntegerType()) { |
| 889 | ParamAttrs |= llvm::ParamAttr::SExt; |
| 890 | } else if (ParamType->isUnsignedIntegerType()) { |
| 891 | ParamAttrs |= llvm::ParamAttr::ZExt; |
| 892 | } |
| 893 | } |
Eli Friedman | ff4a2d9 | 2008-06-01 15:54:49 +0000 | [diff] [blame] | 894 | if (ParamAttrs) |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 895 | ParamAttrList.push_back(llvm::ParamAttrsWithIndex::get(Index, |
Eli Friedman | ff4a2d9 | 2008-06-01 15:54:49 +0000 | [diff] [blame] | 896 | ParamAttrs)); |
| 897 | } |
| 898 | CI->setParamAttrs(llvm::PAListPtr::get(ParamAttrList.begin(), |
| 899 | ParamAttrList.size())); |
| 900 | |
Nate Begeman | ec9426c | 2008-03-09 03:09:36 +0000 | [diff] [blame] | 901 | if (const llvm::Function *F = dyn_cast<llvm::Function>(Callee)) |
| 902 | CI->setCallingConv(F->getCallingConv()); |
| 903 | if (CI->getType() != llvm::Type::VoidTy) |
| 904 | CI->setName("call"); |
Chris Lattner | 9b2dc28 | 2008-04-04 16:54:41 +0000 | [diff] [blame] | 905 | else if (ResultType->isAnyComplexType()) |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 906 | return RValue::getComplex(LoadComplexFromAddr(TempArg0, false)); |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 907 | else if (hasAggregateLLVMType(ResultType)) |
Chris Lattner | cc666af | 2007-08-10 17:02:28 +0000 | [diff] [blame] | 908 | // Struct return. |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 909 | return RValue::getAggregate(TempArg0); |
Chris Lattner | 2202bce | 2007-11-30 17:56:23 +0000 | [diff] [blame] | 910 | else { |
| 911 | // void return. |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 912 | assert(ResultType->isVoidType() && "Should only have a void expr here"); |
Nate Begeman | ec9426c | 2008-03-09 03:09:36 +0000 | [diff] [blame] | 913 | CI = 0; |
Chris Lattner | 2202bce | 2007-11-30 17:56:23 +0000 | [diff] [blame] | 914 | } |
Chris Lattner | cc666af | 2007-08-10 17:02:28 +0000 | [diff] [blame] | 915 | |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame^] | 916 | return RValue::get(CI); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 917 | } |