Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- CGExpr.cpp - Emit LLVM Code from Expressions ---------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This contains code to emit Expr nodes as LLVM code. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "CodeGenFunction.h" |
| 15 | #include "CodeGenModule.h" |
Daniel Dunbar | 0dbe227 | 2008-09-08 21:33:45 +0000 | [diff] [blame] | 16 | #include "CGCall.h" |
Daniel Dunbar | af2f62c | 2008-08-13 00:59:25 +0000 | [diff] [blame] | 17 | #include "CGObjCRuntime.h" |
Daniel Dunbar | de7fb84 | 2008-08-11 05:00:27 +0000 | [diff] [blame] | 18 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 19 | #include "clang/AST/DeclObjC.h" |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 20 | #include "llvm/Target/TargetData.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 21 | using namespace clang; |
| 22 | using namespace CodeGen; |
| 23 | |
| 24 | //===--------------------------------------------------------------------===// |
| 25 | // Miscellaneous Helper Methods |
| 26 | //===--------------------------------------------------------------------===// |
| 27 | |
| 28 | /// CreateTempAlloca - This creates a alloca and inserts it into the entry |
| 29 | /// block. |
| 30 | llvm::AllocaInst *CodeGenFunction::CreateTempAlloca(const llvm::Type *Ty, |
| 31 | const char *Name) { |
Chris Lattner | f146684 | 2009-03-22 00:24:14 +0000 | [diff] [blame] | 32 | if (!Builder.isNamePreserving()) |
| 33 | Name = ""; |
Owen Anderson | d720046 | 2009-07-16 00:14:12 +0000 | [diff] [blame] | 34 | return new llvm::AllocaInst(Ty, 0, Name, AllocaInsertPt); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 35 | } |
| 36 | |
| 37 | /// EvaluateExprAsBool - Perform the usual unary conversions on the specified |
| 38 | /// expression and compare the result against zero, returning an Int1Ty value. |
| 39 | llvm::Value *CodeGenFunction::EvaluateExprAsBool(const Expr *E) { |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 40 | QualType BoolTy = getContext().BoolTy; |
Chris Lattner | 9b2dc28 | 2008-04-04 16:54:41 +0000 | [diff] [blame] | 41 | if (!E->getType()->isAnyComplexType()) |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 42 | return EmitScalarConversion(EmitScalarExpr(E), E->getType(), BoolTy); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 43 | |
Chris Lattner | 9069fa2 | 2007-08-26 16:46:58 +0000 | [diff] [blame] | 44 | return EmitComplexToScalarConversion(EmitComplexExpr(E), E->getType(),BoolTy); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 45 | } |
| 46 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 47 | /// EmitAnyExpr - Emit code to compute the specified expression which can have |
| 48 | /// any type. The result is returned as an RValue struct. If this is an |
| 49 | /// aggregate expression, the aggloc/agglocvolatile arguments indicate where |
| 50 | /// the result should be returned. |
| 51 | RValue CodeGenFunction::EmitAnyExpr(const Expr *E, llvm::Value *AggLoc, |
Anders Carlsson | 14c5cbf | 2009-08-16 07:36:22 +0000 | [diff] [blame] | 52 | bool IsAggLocVolatile, bool IgnoreResult, |
| 53 | bool IsInitializer) { |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 54 | if (!hasAggregateLLVMType(E->getType())) |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 55 | return RValue::get(EmitScalarExpr(E, IgnoreResult)); |
Chris Lattner | 9b2dc28 | 2008-04-04 16:54:41 +0000 | [diff] [blame] | 56 | else if (E->getType()->isAnyComplexType()) |
Mike Stump | 7f79f9b | 2009-05-29 15:46:01 +0000 | [diff] [blame] | 57 | return RValue::getComplex(EmitComplexExpr(E, false, false, |
| 58 | IgnoreResult, IgnoreResult)); |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 59 | |
Anders Carlsson | 14c5cbf | 2009-08-16 07:36:22 +0000 | [diff] [blame] | 60 | EmitAggExpr(E, AggLoc, IsAggLocVolatile, IgnoreResult, IsInitializer); |
| 61 | return RValue::getAggregate(AggLoc, IsAggLocVolatile); |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 62 | } |
| 63 | |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 64 | /// EmitAnyExprToTemp - Similary to EmitAnyExpr(), however, the result |
| 65 | /// will always be accessible even if no aggregate location is |
| 66 | /// provided. |
Anders Carlsson | 14c5cbf | 2009-08-16 07:36:22 +0000 | [diff] [blame] | 67 | RValue CodeGenFunction::EmitAnyExprToTemp(const Expr *E, |
| 68 | bool IsAggLocVolatile, |
| 69 | bool IsInitializer) { |
| 70 | llvm::Value *AggLoc = 0; |
| 71 | |
| 72 | if (hasAggregateLLVMType(E->getType()) && |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 73 | !E->getType()->isAnyComplexType()) |
| 74 | AggLoc = CreateTempAlloca(ConvertType(E->getType()), "agg.tmp"); |
Anders Carlsson | 14c5cbf | 2009-08-16 07:36:22 +0000 | [diff] [blame] | 75 | return EmitAnyExpr(E, AggLoc, IsAggLocVolatile, /*IgnoreResult=*/false, |
| 76 | IsInitializer); |
Daniel Dunbar | 46f45b9 | 2008-09-09 01:06:48 +0000 | [diff] [blame] | 77 | } |
| 78 | |
Anders Carlsson | 4029ca7 | 2009-05-20 00:24:07 +0000 | [diff] [blame] | 79 | RValue CodeGenFunction::EmitReferenceBindingToExpr(const Expr* E, |
Anders Carlsson | 14c5cbf | 2009-08-16 07:36:22 +0000 | [diff] [blame] | 80 | QualType DestType, |
| 81 | bool IsInitializer) { |
Eli Friedman | 5df0d42 | 2009-05-20 02:31:19 +0000 | [diff] [blame] | 82 | RValue Val; |
| 83 | if (E->isLvalue(getContext()) == Expr::LV_Valid) { |
Anders Carlsson | 4bbab92 | 2009-05-20 00:36:58 +0000 | [diff] [blame] | 84 | // Emit the expr as an lvalue. |
| 85 | LValue LV = EmitLValue(E); |
Eli Friedman | 5df0d42 | 2009-05-20 02:31:19 +0000 | [diff] [blame] | 86 | if (LV.isSimple()) |
| 87 | return RValue::get(LV.getAddress()); |
| 88 | Val = EmitLoadOfLValue(LV, E->getType()); |
| 89 | } else { |
Anders Carlsson | 8478ce6 | 2009-08-16 17:50:25 +0000 | [diff] [blame^] | 90 | // FIXME: Initializers don't work with casts yet. For example |
| 91 | // const A& a = B(); |
| 92 | // if B inherits from A. |
Anders Carlsson | 14c5cbf | 2009-08-16 07:36:22 +0000 | [diff] [blame] | 93 | Val = EmitAnyExprToTemp(E, /*IsAggLocVolatile=*/false, |
| 94 | IsInitializer); |
Anders Carlsson | 8478ce6 | 2009-08-16 17:50:25 +0000 | [diff] [blame^] | 95 | |
| 96 | // We might have to destroy the temporary variable. |
| 97 | if (const RecordType *RT = E->getType()->getAs<RecordType>()) { |
| 98 | if (CXXRecordDecl *ClassDecl = dyn_cast<CXXRecordDecl>(RT->getDecl())) { |
| 99 | if (!ClassDecl->hasTrivialDestructor()) { |
| 100 | const CXXDestructorDecl *Dtor = |
| 101 | ClassDecl->getDestructor(getContext()); |
| 102 | |
| 103 | CleanupScope scope(*this); |
| 104 | EmitCXXDestructorCall(Dtor, Dtor_Complete, Val.getAggregateAddr()); |
| 105 | } |
| 106 | } |
| 107 | } |
Anders Carlsson | 4bbab92 | 2009-05-20 00:36:58 +0000 | [diff] [blame] | 108 | } |
Eli Friedman | 5df0d42 | 2009-05-20 02:31:19 +0000 | [diff] [blame] | 109 | |
| 110 | if (Val.isAggregate()) { |
| 111 | Val = RValue::get(Val.getAggregateAddr()); |
| 112 | } else { |
Anders Carlsson | 7cd3a64 | 2009-05-20 01:35:03 +0000 | [diff] [blame] | 113 | // Create a temporary variable that we can bind the reference to. |
Anders Carlsson | e04d1c7 | 2009-05-20 01:03:17 +0000 | [diff] [blame] | 114 | llvm::Value *Temp = CreateTempAlloca(ConvertTypeForMem(E->getType()), |
| 115 | "reftmp"); |
Eli Friedman | 5df0d42 | 2009-05-20 02:31:19 +0000 | [diff] [blame] | 116 | if (Val.isScalar()) |
| 117 | EmitStoreOfScalar(Val.getScalarVal(), Temp, false, E->getType()); |
| 118 | else |
| 119 | StoreComplexToAddr(Val.getComplexVal(), Temp, false); |
| 120 | Val = RValue::get(Temp); |
Anders Carlsson | e04d1c7 | 2009-05-20 01:03:17 +0000 | [diff] [blame] | 121 | } |
Eli Friedman | 5df0d42 | 2009-05-20 02:31:19 +0000 | [diff] [blame] | 122 | |
| 123 | return Val; |
Anders Carlsson | 4029ca7 | 2009-05-20 00:24:07 +0000 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 127 | /// getAccessedFieldNo - Given an encoded value and a result number, return |
| 128 | /// the input field number being accessed. |
| 129 | unsigned CodeGenFunction::getAccessedFieldNo(unsigned Idx, |
| 130 | const llvm::Constant *Elts) { |
| 131 | if (isa<llvm::ConstantAggregateZero>(Elts)) |
| 132 | return 0; |
| 133 | |
| 134 | return cast<llvm::ConstantInt>(Elts->getOperand(Idx))->getZExtValue(); |
| 135 | } |
| 136 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 137 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 138 | //===----------------------------------------------------------------------===// |
| 139 | // LValue Expression Emission |
| 140 | //===----------------------------------------------------------------------===// |
| 141 | |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 142 | RValue CodeGenFunction::GetUndefRValue(QualType Ty) { |
| 143 | if (Ty->isVoidType()) { |
| 144 | return RValue::get(0); |
| 145 | } else if (const ComplexType *CTy = Ty->getAsComplexType()) { |
Daniel Dunbar | 8fa73ed | 2009-01-09 20:09:28 +0000 | [diff] [blame] | 146 | const llvm::Type *EltTy = ConvertType(CTy->getElementType()); |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 147 | llvm::Value *U = llvm::UndefValue::get(EltTy); |
Daniel Dunbar | 8fa73ed | 2009-01-09 20:09:28 +0000 | [diff] [blame] | 148 | return RValue::getComplex(std::make_pair(U, U)); |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 149 | } else if (hasAggregateLLVMType(Ty)) { |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 150 | const llvm::Type *LTy = llvm::PointerType::getUnqual(ConvertType(Ty)); |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 151 | return RValue::getAggregate(llvm::UndefValue::get(LTy)); |
Daniel Dunbar | 8fa73ed | 2009-01-09 20:09:28 +0000 | [diff] [blame] | 152 | } else { |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 153 | return RValue::get(llvm::UndefValue::get(ConvertType(Ty))); |
Daniel Dunbar | 8fa73ed | 2009-01-09 20:09:28 +0000 | [diff] [blame] | 154 | } |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 155 | } |
| 156 | |
Daniel Dunbar | 13e8173 | 2009-02-05 07:09:07 +0000 | [diff] [blame] | 157 | RValue CodeGenFunction::EmitUnsupportedRValue(const Expr *E, |
| 158 | const char *Name) { |
| 159 | ErrorUnsupported(E, Name); |
| 160 | return GetUndefRValue(E->getType()); |
| 161 | } |
| 162 | |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 163 | LValue CodeGenFunction::EmitUnsupportedLValue(const Expr *E, |
| 164 | const char *Name) { |
| 165 | ErrorUnsupported(E, Name); |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 166 | llvm::Type *Ty = llvm::PointerType::getUnqual(ConvertType(E->getType())); |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 167 | return LValue::MakeAddr(llvm::UndefValue::get(Ty), |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 168 | E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 169 | getContext().getObjCGCAttrKind(E->getType()), |
| 170 | E->getType().getAddressSpace()); |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 171 | } |
| 172 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 173 | /// EmitLValue - Emit code to compute a designator that specifies the location |
| 174 | /// of the expression. |
| 175 | /// |
| 176 | /// This can return one of two things: a simple address or a bitfield |
| 177 | /// reference. In either case, the LLVM Value* in the LValue structure is |
| 178 | /// guaranteed to be an LLVM pointer type. |
| 179 | /// |
| 180 | /// If this returns a bitfield reference, nothing about the pointee type of |
| 181 | /// the LLVM value is known: For example, it may not be a pointer to an |
| 182 | /// integer. |
| 183 | /// |
| 184 | /// If this returns a normal address, and if the lvalue's C type is fixed |
| 185 | /// size, this method guarantees that the returned pointer type will point to |
| 186 | /// an LLVM type of the same size of the lvalue's type. If the lvalue has a |
| 187 | /// variable length type, this is not possible. |
| 188 | /// |
| 189 | LValue CodeGenFunction::EmitLValue(const Expr *E) { |
| 190 | switch (E->getStmtClass()) { |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 191 | default: return EmitUnsupportedLValue(E, "l-value expression"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 192 | |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 193 | case Expr::BinaryOperatorClass: |
| 194 | return EmitBinaryOperatorLValue(cast<BinaryOperator>(E)); |
Douglas Gregor | b460980 | 2008-11-14 16:09:21 +0000 | [diff] [blame] | 195 | case Expr::CallExprClass: |
| 196 | case Expr::CXXOperatorCallExprClass: |
| 197 | return EmitCallExprLValue(cast<CallExpr>(E)); |
Daniel Dunbar | 5b5c9ef | 2009-02-11 20:59:32 +0000 | [diff] [blame] | 198 | case Expr::VAArgExprClass: |
| 199 | return EmitVAArgExprLValue(cast<VAArgExpr>(E)); |
Douglas Gregor | 1a49af9 | 2009-01-06 05:10:23 +0000 | [diff] [blame] | 200 | case Expr::DeclRefExprClass: |
| 201 | case Expr::QualifiedDeclRefExprClass: |
| 202 | return EmitDeclRefLValue(cast<DeclRefExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 203 | case Expr::ParenExprClass:return EmitLValue(cast<ParenExpr>(E)->getSubExpr()); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 204 | case Expr::PredefinedExprClass: |
| 205 | return EmitPredefinedLValue(cast<PredefinedExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 206 | case Expr::StringLiteralClass: |
| 207 | return EmitStringLiteralLValue(cast<StringLiteral>(E)); |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 208 | case Expr::ObjCEncodeExprClass: |
| 209 | return EmitObjCEncodeExprLValue(cast<ObjCEncodeExpr>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 210 | |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 211 | case Expr::BlockDeclRefExprClass: |
| 212 | return EmitBlockDeclRefLValue(cast<BlockDeclRefExpr>(E)); |
| 213 | |
Argyrios Kyrtzidis | e3a09e6 | 2008-09-10 02:36:38 +0000 | [diff] [blame] | 214 | case Expr::CXXConditionDeclExprClass: |
| 215 | return EmitCXXConditionDeclLValue(cast<CXXConditionDeclExpr>(E)); |
Anders Carlsson | b58d017 | 2009-05-30 23:23:33 +0000 | [diff] [blame] | 216 | case Expr::CXXTemporaryObjectExprClass: |
| 217 | case Expr::CXXConstructExprClass: |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 218 | return EmitCXXConstructLValue(cast<CXXConstructExpr>(E)); |
| 219 | case Expr::CXXBindTemporaryExprClass: |
| 220 | return EmitCXXBindTemporaryLValue(cast<CXXBindTemporaryExpr>(E)); |
| 221 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 222 | case Expr::ObjCMessageExprClass: |
| 223 | return EmitObjCMessageExprLValue(cast<ObjCMessageExpr>(E)); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 224 | case Expr::ObjCIvarRefExprClass: |
| 225 | return EmitObjCIvarRefLValue(cast<ObjCIvarRefExpr>(E)); |
Daniel Dunbar | 6ba82a4 | 2008-08-25 20:45:57 +0000 | [diff] [blame] | 226 | case Expr::ObjCPropertyRefExprClass: |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 227 | return EmitObjCPropertyRefLValue(cast<ObjCPropertyRefExpr>(E)); |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 228 | case Expr::ObjCKVCRefExprClass: |
| 229 | return EmitObjCKVCRefLValue(cast<ObjCKVCRefExpr>(E)); |
Douglas Gregor | cd9b46e | 2008-11-04 14:56:14 +0000 | [diff] [blame] | 230 | case Expr::ObjCSuperExprClass: |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 231 | return EmitObjCSuperExprLValue(cast<ObjCSuperExpr>(E)); |
Douglas Gregor | cd9b46e | 2008-11-04 14:56:14 +0000 | [diff] [blame] | 232 | |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 233 | case Expr::StmtExprClass: |
| 234 | return EmitStmtExprLValue(cast<StmtExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 235 | case Expr::UnaryOperatorClass: |
| 236 | return EmitUnaryOpLValue(cast<UnaryOperator>(E)); |
| 237 | case Expr::ArraySubscriptExprClass: |
| 238 | return EmitArraySubscriptExpr(cast<ArraySubscriptExpr>(E)); |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 239 | case Expr::ExtVectorElementExprClass: |
| 240 | return EmitExtVectorElementExpr(cast<ExtVectorElementExpr>(E)); |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 241 | case Expr::MemberExprClass: return EmitMemberExpr(cast<MemberExpr>(E)); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 242 | case Expr::CompoundLiteralExprClass: |
| 243 | return EmitCompoundLiteralLValue(cast<CompoundLiteralExpr>(E)); |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 244 | case Expr::ConditionalOperatorClass: |
| 245 | return EmitConditionalOperator(cast<ConditionalOperator>(E)); |
Chris Lattner | 670a62c | 2008-12-12 05:35:08 +0000 | [diff] [blame] | 246 | case Expr::ChooseExprClass: |
Eli Friedman | 7976932 | 2009-03-04 05:52:32 +0000 | [diff] [blame] | 247 | return EmitLValue(cast<ChooseExpr>(E)->getChosenSubExpr(getContext())); |
Chris Lattner | c3953a6 | 2009-03-18 04:02:57 +0000 | [diff] [blame] | 248 | case Expr::ImplicitCastExprClass: |
| 249 | case Expr::CStyleCastExprClass: |
| 250 | case Expr::CXXFunctionalCastExprClass: |
| 251 | case Expr::CXXStaticCastExprClass: |
| 252 | case Expr::CXXDynamicCastExprClass: |
| 253 | case Expr::CXXReinterpretCastExprClass: |
| 254 | case Expr::CXXConstCastExprClass: |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 255 | return EmitCastLValue(cast<CastExpr>(E)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 256 | } |
| 257 | } |
| 258 | |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 259 | llvm::Value *CodeGenFunction::EmitLoadOfScalar(llvm::Value *Addr, bool Volatile, |
| 260 | QualType Ty) { |
| 261 | llvm::Value *V = Builder.CreateLoad(Addr, Volatile, "tmp"); |
| 262 | |
Anders Carlsson | 3bb423b | 2009-05-19 19:36:19 +0000 | [diff] [blame] | 263 | // Bool can have different representation in memory than in registers. |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 264 | if (Ty->isBooleanType()) |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 265 | if (V->getType() != llvm::Type::getInt1Ty(VMContext)) |
| 266 | V = Builder.CreateTrunc(V, llvm::Type::getInt1Ty(VMContext), "tobool"); |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 267 | |
| 268 | return V; |
| 269 | } |
| 270 | |
| 271 | void CodeGenFunction::EmitStoreOfScalar(llvm::Value *Value, llvm::Value *Addr, |
Anders Carlsson | b4aa466 | 2009-05-19 18:50:41 +0000 | [diff] [blame] | 272 | bool Volatile, QualType Ty) { |
Anders Carlsson | 3bb423b | 2009-05-19 19:36:19 +0000 | [diff] [blame] | 273 | |
| 274 | if (Ty->isBooleanType()) { |
| 275 | // Bool can have different representation in memory than in registers. |
| 276 | const llvm::Type *SrcTy = Value->getType(); |
| 277 | const llvm::PointerType *DstPtr = cast<llvm::PointerType>(Addr->getType()); |
| 278 | if (DstPtr->getElementType() != SrcTy) { |
| 279 | const llvm::Type *MemTy = |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 280 | llvm::PointerType::get(SrcTy, DstPtr->getAddressSpace()); |
Anders Carlsson | 3bb423b | 2009-05-19 19:36:19 +0000 | [diff] [blame] | 281 | Addr = Builder.CreateBitCast(Addr, MemTy, "storetmp"); |
| 282 | } |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 283 | } |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 284 | Builder.CreateStore(Value, Addr, Volatile); |
| 285 | } |
| 286 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 287 | /// EmitLoadOfLValue - Given an expression that represents a value lvalue, |
| 288 | /// this method emits the address of the lvalue, then loads the result as an |
| 289 | /// rvalue, returning the rvalue. |
| 290 | RValue CodeGenFunction::EmitLoadOfLValue(LValue LV, QualType ExprType) { |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 291 | if (LV.isObjCWeak()) { |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 292 | // load of a __weak object. |
| 293 | llvm::Value *AddrWeakObj = LV.getAddress(); |
Fariborz Jahanian | 3e283e3 | 2008-11-18 22:37:34 +0000 | [diff] [blame] | 294 | llvm::Value *read_weak = CGM.getObjCRuntime().EmitObjCWeakRead(*this, |
Fariborz Jahanian | 6dc2317 | 2008-11-18 21:45:40 +0000 | [diff] [blame] | 295 | AddrWeakObj); |
| 296 | return RValue::get(read_weak); |
| 297 | } |
| 298 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 299 | if (LV.isSimple()) { |
| 300 | llvm::Value *Ptr = LV.getAddress(); |
| 301 | const llvm::Type *EltTy = |
| 302 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
| 303 | |
| 304 | // Simple scalar l-value. |
Daniel Dunbar | 9d9cc87 | 2009-02-10 00:57:50 +0000 | [diff] [blame] | 305 | if (EltTy->isSingleValueType()) |
| 306 | return RValue::get(EmitLoadOfScalar(Ptr, LV.isVolatileQualified(), |
| 307 | ExprType)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 308 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 309 | assert(ExprType->isFunctionType() && "Unknown scalar value"); |
| 310 | return RValue::get(Ptr); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | if (LV.isVectorElt()) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 314 | llvm::Value *Vec = Builder.CreateLoad(LV.getVectorAddr(), |
| 315 | LV.isVolatileQualified(), "tmp"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 316 | return RValue::get(Builder.CreateExtractElement(Vec, LV.getVectorIdx(), |
| 317 | "vecext")); |
| 318 | } |
Chris Lattner | 46ea8eb | 2007-08-03 00:16:29 +0000 | [diff] [blame] | 319 | |
| 320 | // If this is a reference to a subset of the elements of a vector, either |
| 321 | // shuffle the input or extract/insert them as appropriate. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 322 | if (LV.isExtVectorElt()) |
| 323 | return EmitLoadOfExtVectorElementLValue(LV, ExprType); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 324 | |
| 325 | if (LV.isBitfield()) |
| 326 | return EmitLoadOfBitfieldLValue(LV, ExprType); |
| 327 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 328 | if (LV.isPropertyRef()) |
| 329 | return EmitLoadOfPropertyRefLValue(LV, ExprType); |
| 330 | |
Chris Lattner | 73525de | 2009-02-16 21:11:58 +0000 | [diff] [blame] | 331 | assert(LV.isKVCRef() && "Unknown LValue type!"); |
| 332 | return EmitLoadOfKVCRefLValue(LV, ExprType); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 333 | } |
| 334 | |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 335 | RValue CodeGenFunction::EmitLoadOfBitfieldLValue(LValue LV, |
| 336 | QualType ExprType) { |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 337 | unsigned StartBit = LV.getBitfieldStartBit(); |
| 338 | unsigned BitfieldSize = LV.getBitfieldSize(); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 339 | llvm::Value *Ptr = LV.getBitfieldAddr(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 340 | |
| 341 | const llvm::Type *EltTy = |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 342 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 343 | unsigned EltTySize = CGM.getTargetData().getTypeSizeInBits(EltTy); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 344 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 345 | // In some cases the bitfield may straddle two memory locations. |
| 346 | // Currently we load the entire bitfield, then do the magic to |
| 347 | // sign-extend it if necessary. This results in somewhat more code |
| 348 | // than necessary for the common case (one load), since two shifts |
| 349 | // accomplish both the masking and sign extension. |
| 350 | unsigned LowBits = std::min(BitfieldSize, EltTySize - StartBit); |
| 351 | llvm::Value *Val = Builder.CreateLoad(Ptr, LV.isVolatileQualified(), "tmp"); |
| 352 | |
| 353 | // Shift to proper location. |
Daniel Dunbar | f3edc2f | 2008-11-13 02:20:34 +0000 | [diff] [blame] | 354 | if (StartBit) |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 355 | Val = Builder.CreateLShr(Val, llvm::ConstantInt::get(EltTy, StartBit), |
Daniel Dunbar | f3edc2f | 2008-11-13 02:20:34 +0000 | [diff] [blame] | 356 | "bf.lo"); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 357 | |
| 358 | // Mask off unused bits. |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 359 | llvm::Constant *LowMask = llvm::ConstantInt::get(VMContext, |
| 360 | llvm::APInt::getLowBitsSet(EltTySize, LowBits)); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 361 | Val = Builder.CreateAnd(Val, LowMask, "bf.lo.cleared"); |
| 362 | |
| 363 | // Fetch the high bits if necessary. |
| 364 | if (LowBits < BitfieldSize) { |
| 365 | unsigned HighBits = BitfieldSize - LowBits; |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 366 | llvm::Value *HighPtr = Builder.CreateGEP(Ptr, llvm::ConstantInt::get( |
| 367 | llvm::Type::getInt32Ty(VMContext), 1), "bf.ptr.hi"); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 368 | llvm::Value *HighVal = Builder.CreateLoad(HighPtr, |
| 369 | LV.isVolatileQualified(), |
| 370 | "tmp"); |
| 371 | |
| 372 | // Mask off unused bits. |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 373 | llvm::Constant *HighMask = llvm::ConstantInt::get(VMContext, |
| 374 | llvm::APInt::getLowBitsSet(EltTySize, HighBits)); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 375 | HighVal = Builder.CreateAnd(HighVal, HighMask, "bf.lo.cleared"); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 376 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 377 | // Shift to proper location and or in to bitfield value. |
| 378 | HighVal = Builder.CreateShl(HighVal, |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 379 | llvm::ConstantInt::get(EltTy, LowBits)); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 380 | Val = Builder.CreateOr(Val, HighVal, "bf.val"); |
| 381 | } |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 382 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 383 | // Sign extend if necessary. |
| 384 | if (LV.isBitfieldSigned()) { |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 385 | llvm::Value *ExtraBits = llvm::ConstantInt::get(EltTy, |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 386 | EltTySize - BitfieldSize); |
| 387 | Val = Builder.CreateAShr(Builder.CreateShl(Val, ExtraBits), |
| 388 | ExtraBits, "bf.val.sext"); |
| 389 | } |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 390 | |
| 391 | // The bitfield type and the normal type differ when the storage sizes |
| 392 | // differ (currently just _Bool). |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 393 | Val = Builder.CreateIntCast(Val, ConvertType(ExprType), false, "tmp"); |
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 | return RValue::get(Val); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 396 | } |
| 397 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 398 | RValue CodeGenFunction::EmitLoadOfPropertyRefLValue(LValue LV, |
| 399 | QualType ExprType) { |
| 400 | return EmitObjCPropertyGet(LV.getPropertyRefExpr()); |
| 401 | } |
| 402 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 403 | RValue CodeGenFunction::EmitLoadOfKVCRefLValue(LValue LV, |
| 404 | QualType ExprType) { |
| 405 | return EmitObjCPropertyGet(LV.getKVCRefExpr()); |
| 406 | } |
| 407 | |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 408 | // If this is a reference to a subset of the elements of a vector, create an |
| 409 | // appropriate shufflevector. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 410 | RValue CodeGenFunction::EmitLoadOfExtVectorElementLValue(LValue LV, |
| 411 | QualType ExprType) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 412 | llvm::Value *Vec = Builder.CreateLoad(LV.getExtVectorAddr(), |
| 413 | LV.isVolatileQualified(), "tmp"); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 414 | |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 415 | const llvm::Constant *Elts = LV.getExtVectorElts(); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 416 | |
| 417 | // If the result of the expression is a non-vector type, we must be |
| 418 | // extracting a single element. Just codegen as an extractelement. |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 419 | const VectorType *ExprVT = ExprType->getAsVectorType(); |
| 420 | if (!ExprVT) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 421 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 422 | llvm::Value *Elt = llvm::ConstantInt::get( |
| 423 | llvm::Type::getInt32Ty(VMContext), InIdx); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 424 | return RValue::get(Builder.CreateExtractElement(Vec, Elt, "tmp")); |
| 425 | } |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 426 | |
| 427 | // Always use shuffle vector to try to retain the original program structure |
Chris Lattner | cf60cd2 | 2007-08-10 17:10:08 +0000 | [diff] [blame] | 428 | unsigned NumResultElts = ExprVT->getNumElements(); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 429 | |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 430 | llvm::SmallVector<llvm::Constant*, 4> Mask; |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 431 | for (unsigned i = 0; i != NumResultElts; ++i) { |
Dan Gohman | 4f8d123 | 2008-05-22 00:50:06 +0000 | [diff] [blame] | 432 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 433 | Mask.push_back(llvm::ConstantInt::get( |
| 434 | llvm::Type::getInt32Ty(VMContext), InIdx)); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 435 | } |
| 436 | |
Owen Anderson | 4a28932 | 2009-07-28 21:22:35 +0000 | [diff] [blame] | 437 | llvm::Value *MaskV = llvm::ConstantVector::get(&Mask[0], Mask.size()); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 438 | Vec = Builder.CreateShuffleVector(Vec, |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 439 | llvm::UndefValue::get(Vec->getType()), |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 440 | MaskV, "tmp"); |
| 441 | return RValue::get(Vec); |
Chris Lattner | 34cdc86 | 2007-08-03 16:18:34 +0000 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 445 | |
| 446 | /// EmitStoreThroughLValue - Store the specified rvalue into the specified |
| 447 | /// lvalue, where both are guaranteed to the have the same type, and that type |
| 448 | /// is 'Ty'. |
| 449 | void CodeGenFunction::EmitStoreThroughLValue(RValue Src, LValue Dst, |
| 450 | QualType Ty) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 451 | if (!Dst.isSimple()) { |
| 452 | if (Dst.isVectorElt()) { |
| 453 | // Read/modify/write the vector, inserting the new element. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 454 | llvm::Value *Vec = Builder.CreateLoad(Dst.getVectorAddr(), |
| 455 | Dst.isVolatileQualified(), "tmp"); |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 456 | Vec = Builder.CreateInsertElement(Vec, Src.getScalarVal(), |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 457 | Dst.getVectorIdx(), "vecins"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 458 | Builder.CreateStore(Vec, Dst.getVectorAddr(),Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 459 | return; |
| 460 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 461 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 462 | // If this is an update of extended vector elements, insert them as |
| 463 | // appropriate. |
| 464 | if (Dst.isExtVectorElt()) |
| 465 | return EmitStoreThroughExtVectorComponentLValue(Src, Dst, Ty); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 466 | |
| 467 | if (Dst.isBitfield()) |
| 468 | return EmitStoreThroughBitfieldLValue(Src, Dst, Ty); |
| 469 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 470 | if (Dst.isPropertyRef()) |
| 471 | return EmitStoreThroughPropertyRefLValue(Src, Dst, Ty); |
| 472 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 473 | if (Dst.isKVCRef()) |
| 474 | return EmitStoreThroughKVCRefLValue(Src, Dst, Ty); |
| 475 | |
Lauro Ramos Venancio | 6553982 | 2008-01-22 22:38:35 +0000 | [diff] [blame] | 476 | assert(0 && "Unknown LValue type"); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 477 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 478 | |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 479 | if (Dst.isObjCWeak() && !Dst.isNonGC()) { |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 480 | // load of a __weak object. |
| 481 | llvm::Value *LvalueDst = Dst.getAddress(); |
| 482 | llvm::Value *src = Src.getScalarVal(); |
Mike Stump | f33651c | 2009-04-14 00:57:29 +0000 | [diff] [blame] | 483 | CGM.getObjCRuntime().EmitObjCWeakAssign(*this, src, LvalueDst); |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 484 | return; |
| 485 | } |
| 486 | |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 487 | if (Dst.isObjCStrong() && !Dst.isNonGC()) { |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 488 | // load of a __strong object. |
| 489 | llvm::Value *LvalueDst = Dst.getAddress(); |
| 490 | llvm::Value *src = Src.getScalarVal(); |
Fariborz Jahanian | 167fdc1 | 2009-02-19 18:29:24 +0000 | [diff] [blame] | 491 | #if 0 |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 492 | // FIXME. We cannot positively determine if we have an 'ivar' assignment, |
| 493 | // object assignment or an unknown assignment. For now, generate call to |
| 494 | // objc_assign_strongCast assignment which is a safe, but consevative |
| 495 | // assumption. |
Fariborz Jahanian | d1cc804 | 2008-11-20 20:53:20 +0000 | [diff] [blame] | 496 | if (Dst.isObjCIvar()) |
| 497 | CGM.getObjCRuntime().EmitObjCIvarAssign(*this, src, LvalueDst); |
| 498 | else |
| 499 | CGM.getObjCRuntime().EmitObjCGlobalAssign(*this, src, LvalueDst); |
Fariborz Jahanian | 167fdc1 | 2009-02-19 18:29:24 +0000 | [diff] [blame] | 500 | #endif |
Fariborz Jahanian | bf63b87 | 2009-05-04 23:27:20 +0000 | [diff] [blame] | 501 | if (Dst.isGlobalObjCRef()) |
| 502 | CGM.getObjCRuntime().EmitObjCGlobalAssign(*this, src, LvalueDst); |
| 503 | else |
| 504 | CGM.getObjCRuntime().EmitObjCStrongCastAssign(*this, src, LvalueDst); |
Fariborz Jahanian | dbd32c2 | 2008-11-19 17:34:06 +0000 | [diff] [blame] | 505 | return; |
| 506 | } |
| 507 | |
Chris Lattner | 883f6a7 | 2007-08-11 00:04:45 +0000 | [diff] [blame] | 508 | assert(Src.isScalar() && "Can't emit an agg store with this method"); |
Anders Carlsson | b4aa466 | 2009-05-19 18:50:41 +0000 | [diff] [blame] | 509 | EmitStoreOfScalar(Src.getScalarVal(), Dst.getAddress(), |
| 510 | Dst.isVolatileQualified(), Ty); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 511 | } |
| 512 | |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 513 | void CodeGenFunction::EmitStoreThroughBitfieldLValue(RValue Src, LValue Dst, |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 514 | QualType Ty, |
| 515 | llvm::Value **Result) { |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 516 | unsigned StartBit = Dst.getBitfieldStartBit(); |
| 517 | unsigned BitfieldSize = Dst.getBitfieldSize(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 518 | llvm::Value *Ptr = Dst.getBitfieldAddr(); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 519 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 520 | const llvm::Type *EltTy = |
| 521 | cast<llvm::PointerType>(Ptr->getType())->getElementType(); |
| 522 | unsigned EltTySize = CGM.getTargetData().getTypeSizeInBits(EltTy); |
| 523 | |
| 524 | // Get the new value, cast to the appropriate type and masked to |
| 525 | // exactly the size of the bit-field. |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 526 | llvm::Value *SrcVal = Src.getScalarVal(); |
| 527 | llvm::Value *NewVal = Builder.CreateIntCast(SrcVal, EltTy, false, "tmp"); |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 528 | llvm::Constant *Mask = llvm::ConstantInt::get(VMContext, |
| 529 | llvm::APInt::getLowBitsSet(EltTySize, BitfieldSize)); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 530 | NewVal = Builder.CreateAnd(NewVal, Mask, "bf.value"); |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 531 | |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 532 | // Return the new value of the bit-field, if requested. |
| 533 | if (Result) { |
| 534 | // Cast back to the proper type for result. |
| 535 | const llvm::Type *SrcTy = SrcVal->getType(); |
| 536 | llvm::Value *SrcTrunc = Builder.CreateIntCast(NewVal, SrcTy, false, |
| 537 | "bf.reload.val"); |
| 538 | |
| 539 | // Sign extend if necessary. |
| 540 | if (Dst.isBitfieldSigned()) { |
| 541 | unsigned SrcTySize = CGM.getTargetData().getTypeSizeInBits(SrcTy); |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 542 | llvm::Value *ExtraBits = llvm::ConstantInt::get(SrcTy, |
Daniel Dunbar | ed3849b | 2008-11-19 09:36:46 +0000 | [diff] [blame] | 543 | SrcTySize - BitfieldSize); |
| 544 | SrcTrunc = Builder.CreateAShr(Builder.CreateShl(SrcTrunc, ExtraBits), |
| 545 | ExtraBits, "bf.reload.sext"); |
| 546 | } |
| 547 | |
| 548 | *Result = SrcTrunc; |
| 549 | } |
| 550 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 551 | // In some cases the bitfield may straddle two memory locations. |
| 552 | // Emit the low part first and check to see if the high needs to be |
| 553 | // done. |
| 554 | unsigned LowBits = std::min(BitfieldSize, EltTySize - StartBit); |
| 555 | llvm::Value *LowVal = Builder.CreateLoad(Ptr, Dst.isVolatileQualified(), |
| 556 | "bf.prev.low"); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 557 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 558 | // Compute the mask for zero-ing the low part of this bitfield. |
| 559 | llvm::Constant *InvMask = |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 560 | llvm::ConstantInt::get(VMContext, |
| 561 | ~llvm::APInt::getBitsSet(EltTySize, StartBit, StartBit + LowBits)); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 562 | |
| 563 | // Compute the new low part as |
| 564 | // LowVal = (LowVal & InvMask) | (NewVal << StartBit), |
| 565 | // with the shift of NewVal implicitly stripping the high bits. |
| 566 | llvm::Value *NewLowVal = |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 567 | Builder.CreateShl(NewVal, llvm::ConstantInt::get(EltTy, StartBit), |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 568 | "bf.value.lo"); |
| 569 | LowVal = Builder.CreateAnd(LowVal, InvMask, "bf.prev.lo.cleared"); |
| 570 | LowVal = Builder.CreateOr(LowVal, NewLowVal, "bf.new.lo"); |
| 571 | |
| 572 | // Write back. |
| 573 | Builder.CreateStore(LowVal, Ptr, Dst.isVolatileQualified()); |
Eli Friedman | 316bb1b | 2008-05-17 20:03:47 +0000 | [diff] [blame] | 574 | |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 575 | // If the low part doesn't cover the bitfield emit a high part. |
| 576 | if (LowBits < BitfieldSize) { |
| 577 | unsigned HighBits = BitfieldSize - LowBits; |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 578 | llvm::Value *HighPtr = Builder.CreateGEP(Ptr, llvm::ConstantInt::get( |
| 579 | llvm::Type::getInt32Ty(VMContext), 1), "bf.ptr.hi"); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 580 | llvm::Value *HighVal = Builder.CreateLoad(HighPtr, |
| 581 | Dst.isVolatileQualified(), |
| 582 | "bf.prev.hi"); |
| 583 | |
| 584 | // Compute the mask for zero-ing the high part of this bitfield. |
| 585 | llvm::Constant *InvMask = |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 586 | llvm::ConstantInt::get(VMContext, ~llvm::APInt::getLowBitsSet(EltTySize, |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 587 | HighBits)); |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 588 | |
| 589 | // Compute the new high part as |
| 590 | // HighVal = (HighVal & InvMask) | (NewVal lshr LowBits), |
| 591 | // where the high bits of NewVal have already been cleared and the |
| 592 | // shift stripping the low bits. |
| 593 | llvm::Value *NewHighVal = |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 594 | Builder.CreateLShr(NewVal, llvm::ConstantInt::get(EltTy, LowBits), |
Daniel Dunbar | 10e3ded | 2008-08-06 05:08:45 +0000 | [diff] [blame] | 595 | "bf.value.high"); |
| 596 | HighVal = Builder.CreateAnd(HighVal, InvMask, "bf.prev.hi.cleared"); |
| 597 | HighVal = Builder.CreateOr(HighVal, NewHighVal, "bf.new.hi"); |
| 598 | |
| 599 | // Write back. |
| 600 | Builder.CreateStore(HighVal, HighPtr, Dst.isVolatileQualified()); |
| 601 | } |
Lauro Ramos Venancio | a0c5d0e | 2008-01-22 22:36:45 +0000 | [diff] [blame] | 602 | } |
| 603 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 604 | void CodeGenFunction::EmitStoreThroughPropertyRefLValue(RValue Src, |
| 605 | LValue Dst, |
| 606 | QualType Ty) { |
| 607 | EmitObjCPropertySet(Dst.getPropertyRefExpr(), Src); |
| 608 | } |
| 609 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 610 | void CodeGenFunction::EmitStoreThroughKVCRefLValue(RValue Src, |
| 611 | LValue Dst, |
| 612 | QualType Ty) { |
| 613 | EmitObjCPropertySet(Dst.getKVCRefExpr(), Src); |
| 614 | } |
| 615 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 616 | void CodeGenFunction::EmitStoreThroughExtVectorComponentLValue(RValue Src, |
| 617 | LValue Dst, |
| 618 | QualType Ty) { |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 619 | // This access turns into a read/modify/write of the vector. Load the input |
| 620 | // value now. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 621 | llvm::Value *Vec = Builder.CreateLoad(Dst.getExtVectorAddr(), |
| 622 | Dst.isVolatileQualified(), "tmp"); |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 623 | const llvm::Constant *Elts = Dst.getExtVectorElts(); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 624 | |
Chris Lattner | 9b65551 | 2007-08-31 22:49:20 +0000 | [diff] [blame] | 625 | llvm::Value *SrcVal = Src.getScalarVal(); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 626 | |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 627 | if (const VectorType *VTy = Ty->getAsVectorType()) { |
| 628 | unsigned NumSrcElts = VTy->getNumElements(); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 629 | unsigned NumDstElts = |
| 630 | cast<llvm::VectorType>(Vec->getType())->getNumElements(); |
| 631 | if (NumDstElts == NumSrcElts) { |
| 632 | // Use shuffle vector is the src and destination are the same number |
Nate Begeman | 6e5dd86 | 2009-06-26 21:12:50 +0000 | [diff] [blame] | 633 | // of elements and restore the vector mask since it is on the side |
| 634 | // it will be stored. |
| 635 | llvm::SmallVector<llvm::Constant*, 4> Mask(NumDstElts); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 636 | for (unsigned i = 0; i != NumSrcElts; ++i) { |
| 637 | unsigned InIdx = getAccessedFieldNo(i, Elts); |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 638 | Mask[InIdx] = llvm::ConstantInt::get( |
| 639 | llvm::Type::getInt32Ty(VMContext), i); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 640 | } |
| 641 | |
Owen Anderson | 4a28932 | 2009-07-28 21:22:35 +0000 | [diff] [blame] | 642 | llvm::Value *MaskV = llvm::ConstantVector::get(&Mask[0], Mask.size()); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 643 | Vec = Builder.CreateShuffleVector(SrcVal, |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 644 | llvm::UndefValue::get(Vec->getType()), |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 645 | MaskV, "tmp"); |
Mike Stump | b3589f4 | 2009-07-30 22:28:39 +0000 | [diff] [blame] | 646 | } else if (NumDstElts > NumSrcElts) { |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 647 | // Extended the source vector to the same length and then shuffle it |
| 648 | // into the destination. |
| 649 | // FIXME: since we're shuffling with undef, can we just use the indices |
| 650 | // into that? This could be simpler. |
| 651 | llvm::SmallVector<llvm::Constant*, 4> ExtMask; |
| 652 | unsigned i; |
| 653 | for (i = 0; i != NumSrcElts; ++i) |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 654 | ExtMask.push_back(llvm::ConstantInt::get( |
| 655 | llvm::Type::getInt32Ty(VMContext), i)); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 656 | for (; i != NumDstElts; ++i) |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 657 | ExtMask.push_back(llvm::UndefValue::get( |
| 658 | llvm::Type::getInt32Ty(VMContext))); |
Owen Anderson | 4a28932 | 2009-07-28 21:22:35 +0000 | [diff] [blame] | 659 | llvm::Value *ExtMaskV = llvm::ConstantVector::get(&ExtMask[0], |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 660 | ExtMask.size()); |
Daniel Dunbar | bb76773 | 2009-02-17 18:31:04 +0000 | [diff] [blame] | 661 | llvm::Value *ExtSrcVal = |
| 662 | Builder.CreateShuffleVector(SrcVal, |
Owen Anderson | 03e2050 | 2009-07-30 23:11:26 +0000 | [diff] [blame] | 663 | llvm::UndefValue::get(SrcVal->getType()), |
Daniel Dunbar | bb76773 | 2009-02-17 18:31:04 +0000 | [diff] [blame] | 664 | ExtMaskV, "tmp"); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 665 | // build identity |
| 666 | llvm::SmallVector<llvm::Constant*, 4> Mask; |
| 667 | for (unsigned i = 0; i != NumDstElts; ++i) { |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 668 | Mask.push_back(llvm::ConstantInt::get( |
| 669 | llvm::Type::getInt32Ty(VMContext), i)); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 670 | } |
| 671 | // modify when what gets shuffled in |
| 672 | for (unsigned i = 0; i != NumSrcElts; ++i) { |
| 673 | unsigned Idx = getAccessedFieldNo(i, Elts); |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 674 | Mask[Idx] = llvm::ConstantInt::get( |
| 675 | llvm::Type::getInt32Ty(VMContext), i+NumDstElts); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 676 | } |
Owen Anderson | 4a28932 | 2009-07-28 21:22:35 +0000 | [diff] [blame] | 677 | llvm::Value *MaskV = llvm::ConstantVector::get(&Mask[0], Mask.size()); |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 678 | Vec = Builder.CreateShuffleVector(Vec, ExtSrcVal, MaskV, "tmp"); |
Mike Stump | b3589f4 | 2009-07-30 22:28:39 +0000 | [diff] [blame] | 679 | } else { |
Nate Begeman | 6fe7c8a | 2009-01-18 06:42:49 +0000 | [diff] [blame] | 680 | // We should never shorten the vector |
| 681 | assert(0 && "unexpected shorten vector length"); |
Chris Lattner | 7e6b51b | 2007-08-03 16:37:04 +0000 | [diff] [blame] | 682 | } |
| 683 | } else { |
| 684 | // 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] | 685 | unsigned InIdx = getAccessedFieldNo(0, Elts); |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 686 | llvm::Value *Elt = llvm::ConstantInt::get( |
| 687 | llvm::Type::getInt32Ty(VMContext), InIdx); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 688 | Vec = Builder.CreateInsertElement(Vec, SrcVal, Elt, "tmp"); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 689 | } |
| 690 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 691 | Builder.CreateStore(Vec, Dst.getExtVectorAddr(), Dst.isVolatileQualified()); |
Chris Lattner | 017d6aa | 2007-08-03 16:28:33 +0000 | [diff] [blame] | 692 | } |
| 693 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 694 | LValue CodeGenFunction::EmitDeclRefLValue(const DeclRefExpr *E) { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 695 | const VarDecl *VD = dyn_cast<VarDecl>(E->getDecl()); |
| 696 | |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 697 | if (VD && (VD->isBlockVarDecl() || isa<ParmVarDecl>(VD) || |
| 698 | isa<ImplicitParamDecl>(VD))) { |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 699 | LValue LV; |
Douglas Gregor | 68584ed | 2009-06-18 16:11:24 +0000 | [diff] [blame] | 700 | bool NonGCable = VD->hasLocalStorage() && |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 701 | !VD->hasAttr<BlocksAttr>(); |
Daniel Dunbar | 5466c7b | 2009-04-14 02:25:56 +0000 | [diff] [blame] | 702 | if (VD->hasExternalStorage()) { |
Anders Carlsson | c8667a8 | 2009-05-19 20:40:02 +0000 | [diff] [blame] | 703 | llvm::Value *V = CGM.GetAddrOfGlobalVar(VD); |
| 704 | if (VD->getType()->isReferenceType()) |
| 705 | V = Builder.CreateLoad(V, "tmp"); |
| 706 | LV = LValue::MakeAddr(V, E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 707 | getContext().getObjCGCAttrKind(E->getType()), |
| 708 | E->getType().getAddressSpace()); |
Mike Stump | b3589f4 | 2009-07-30 22:28:39 +0000 | [diff] [blame] | 709 | } else { |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 710 | llvm::Value *V = LocalDeclMap[VD]; |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 711 | assert(V && "DeclRefExpr not entered in LocalDeclMap?"); |
Fariborz Jahanian | 4f54526 | 2009-02-20 01:14:43 +0000 | [diff] [blame] | 712 | // local variables do not get their gc attribute set. |
| 713 | QualType::GCAttrTypes attr = QualType::GCNone; |
| 714 | // local static? |
Fariborz Jahanian | 5296777 | 2009-05-27 19:48:48 +0000 | [diff] [blame] | 715 | if (!NonGCable) |
Fariborz Jahanian | 4f54526 | 2009-02-20 01:14:43 +0000 | [diff] [blame] | 716 | attr = getContext().getObjCGCAttrKind(E->getType()); |
Argyrios Kyrtzidis | 40b598e | 2009-06-30 02:34:44 +0000 | [diff] [blame] | 717 | if (VD->hasAttr<BlocksAttr>()) { |
Mike Stump | dab514f | 2009-03-04 03:23:46 +0000 | [diff] [blame] | 718 | bool needsCopyDispose = BlockRequiresCopying(VD->getType()); |
| 719 | const llvm::Type *PtrStructTy = V->getType(); |
| 720 | const llvm::Type *Ty = PtrStructTy; |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 721 | Ty = llvm::PointerType::get(Ty, 0); |
Mike Stump | dab514f | 2009-03-04 03:23:46 +0000 | [diff] [blame] | 722 | V = Builder.CreateStructGEP(V, 1, "forwarding"); |
| 723 | V = Builder.CreateBitCast(V, Ty); |
| 724 | V = Builder.CreateLoad(V, false); |
| 725 | V = Builder.CreateBitCast(V, PtrStructTy); |
| 726 | V = Builder.CreateStructGEP(V, needsCopyDispose*2 + 4, "x"); |
| 727 | } |
Anders Carlsson | c8667a8 | 2009-05-19 20:40:02 +0000 | [diff] [blame] | 728 | if (VD->getType()->isReferenceType()) |
| 729 | V = Builder.CreateLoad(V, "tmp"); |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 730 | LV = LValue::MakeAddr(V, E->getType().getCVRQualifiers(), attr, |
| 731 | E->getType().getAddressSpace()); |
Lauro Ramos Venancio | fea90b8 | 2008-02-16 22:30:38 +0000 | [diff] [blame] | 732 | } |
Fariborz Jahanian | 5296777 | 2009-05-27 19:48:48 +0000 | [diff] [blame] | 733 | LValue::SetObjCNonGC(LV, NonGCable); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 734 | return LV; |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 735 | } else if (VD && VD->isFileVarDecl()) { |
Anders Carlsson | c8667a8 | 2009-05-19 20:40:02 +0000 | [diff] [blame] | 736 | llvm::Value *V = CGM.GetAddrOfGlobalVar(VD); |
| 737 | if (VD->getType()->isReferenceType()) |
| 738 | V = Builder.CreateLoad(V, "tmp"); |
| 739 | LValue LV = LValue::MakeAddr(V, E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 740 | getContext().getObjCGCAttrKind(E->getType()), |
| 741 | E->getType().getAddressSpace()); |
Fariborz Jahanian | bf63b87 | 2009-05-04 23:27:20 +0000 | [diff] [blame] | 742 | if (LV.isObjCStrong()) |
| 743 | LV.SetGlobalObjCRef(LV, true); |
Fariborz Jahanian | 6d657c4 | 2008-11-18 20:18:11 +0000 | [diff] [blame] | 744 | return LV; |
Steve Naroff | 248a753 | 2008-04-15 22:42:06 +0000 | [diff] [blame] | 745 | } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(E->getDecl())) { |
Eli Friedman | 3fbc473 | 2009-06-01 10:04:20 +0000 | [diff] [blame] | 746 | llvm::Value* V = CGM.GetAddrOfFunction(GlobalDecl(FD)); |
| 747 | if (!FD->hasPrototype()) { |
| 748 | if (const FunctionProtoType *Proto = |
| 749 | FD->getType()->getAsFunctionProtoType()) { |
| 750 | // Ugly case: for a K&R-style definition, the type of the definition |
| 751 | // isn't the same as the type of a use. Correct for this with a |
| 752 | // bitcast. |
| 753 | QualType NoProtoType = |
| 754 | getContext().getFunctionNoProtoType(Proto->getResultType()); |
| 755 | NoProtoType = getContext().getPointerType(NoProtoType); |
| 756 | V = Builder.CreateBitCast(V, ConvertType(NoProtoType), "tmp"); |
| 757 | } |
| 758 | } |
| 759 | return LValue::MakeAddr(V, E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 760 | getContext().getObjCGCAttrKind(E->getType()), |
| 761 | E->getType().getAddressSpace()); |
Mike Stump | b3589f4 | 2009-07-30 22:28:39 +0000 | [diff] [blame] | 762 | } else if (const ImplicitParamDecl *IPD = |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 763 | dyn_cast<ImplicitParamDecl>(E->getDecl())) { |
| 764 | llvm::Value *V = LocalDeclMap[IPD]; |
| 765 | assert(V && "BlockVarDecl not entered in LocalDeclMap?"); |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 766 | return LValue::MakeAddr(V, E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 767 | getContext().getObjCGCAttrKind(E->getType()), |
| 768 | E->getType().getAddressSpace()); |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 769 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 770 | assert(0 && "Unimp declref"); |
Chris Lattner | b1776cb | 2007-09-16 19:23:47 +0000 | [diff] [blame] | 771 | //an invalid LValue, but the assert will |
| 772 | //ensure that this point is never reached. |
| 773 | return LValue(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 774 | } |
| 775 | |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 776 | LValue CodeGenFunction::EmitBlockDeclRefLValue(const BlockDeclRefExpr *E) { |
Daniel Dunbar | e226534 | 2009-05-23 02:49:02 +0000 | [diff] [blame] | 777 | return LValue::MakeAddr(GetAddrOfBlockDecl(E), |
| 778 | E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 779 | getContext().getObjCGCAttrKind(E->getType()), |
| 780 | E->getType().getAddressSpace()); |
Mike Stump | a99038c | 2009-02-28 09:07:16 +0000 | [diff] [blame] | 781 | } |
| 782 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 783 | LValue CodeGenFunction::EmitUnaryOpLValue(const UnaryOperator *E) { |
| 784 | // __extension__ doesn't affect lvalue-ness. |
| 785 | if (E->getOpcode() == UnaryOperator::Extension) |
| 786 | return EmitLValue(E->getSubExpr()); |
| 787 | |
Chris Lattner | 9619662 | 2008-07-26 22:37:01 +0000 | [diff] [blame] | 788 | QualType ExprTy = getContext().getCanonicalType(E->getSubExpr()->getType()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 789 | switch (E->getOpcode()) { |
| 790 | default: assert(0 && "Unknown unary operator lvalue!"); |
| 791 | case UnaryOperator::Deref: |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 792 | { |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 793 | QualType T = E->getSubExpr()->getType()->getPointeeType(); |
| 794 | assert(!T.isNull() && "CodeGenFunction::EmitUnaryOpLValue: Illegal type"); |
| 795 | |
Fariborz Jahanian | 207c521 | 2009-02-23 18:59:50 +0000 | [diff] [blame] | 796 | LValue LV = LValue::MakeAddr(EmitScalarExpr(E->getSubExpr()), |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 797 | T.getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 798 | getContext().getObjCGCAttrKind(T), |
| 799 | ExprTy.getAddressSpace()); |
Fariborz Jahanian | 207c521 | 2009-02-23 18:59:50 +0000 | [diff] [blame] | 800 | // We should not generate __weak write barrier on indirect reference |
| 801 | // of a pointer to object; as in void foo (__weak id *param); *param = 0; |
| 802 | // But, we continue to generate __strong write barrier on indirect write |
| 803 | // into a pointer to object. |
| 804 | if (getContext().getLangOptions().ObjC1 && |
| 805 | getContext().getLangOptions().getGCMode() != LangOptions::NonGC && |
| 806 | LV.isObjCWeak()) |
Fariborz Jahanian | 102e390 | 2009-06-01 21:29:32 +0000 | [diff] [blame] | 807 | LValue::SetObjCNonGC(LV, !E->isOBJCGCCandidate(getContext())); |
Fariborz Jahanian | 207c521 | 2009-02-23 18:59:50 +0000 | [diff] [blame] | 808 | return LV; |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 809 | } |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 810 | case UnaryOperator::Real: |
| 811 | case UnaryOperator::Imag: |
| 812 | LValue LV = EmitLValue(E->getSubExpr()); |
Chris Lattner | 36b6a0a | 2008-03-19 05:19:41 +0000 | [diff] [blame] | 813 | unsigned Idx = E->getOpcode() == UnaryOperator::Imag; |
| 814 | return LValue::MakeAddr(Builder.CreateStructGEP(LV.getAddress(), |
Chris Lattner | b77792e | 2008-07-26 22:17:49 +0000 | [diff] [blame] | 815 | Idx, "idx"), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 816 | ExprTy.getCVRQualifiers(), |
| 817 | QualType::GCNone, |
| 818 | ExprTy.getAddressSpace()); |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 819 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 820 | } |
| 821 | |
| 822 | LValue CodeGenFunction::EmitStringLiteralLValue(const StringLiteral *E) { |
Daniel Dunbar | 6143293 | 2008-08-13 23:20:05 +0000 | [diff] [blame] | 823 | return LValue::MakeAddr(CGM.GetAddrOfConstantStringFromLiteral(E), 0); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 824 | } |
| 825 | |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 826 | LValue CodeGenFunction::EmitObjCEncodeExprLValue(const ObjCEncodeExpr *E) { |
| 827 | return LValue::MakeAddr(CGM.GetAddrOfConstantStringFromObjCEncode(E), 0); |
| 828 | } |
| 829 | |
| 830 | |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 831 | LValue CodeGenFunction::EmitPredefinedFunctionName(unsigned Type) { |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 832 | std::string GlobalVarName; |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 833 | |
| 834 | switch (Type) { |
Chris Lattner | eaf2bb8 | 2009-02-24 22:18:39 +0000 | [diff] [blame] | 835 | default: |
| 836 | assert(0 && "Invalid type"); |
| 837 | case PredefinedExpr::Func: |
| 838 | GlobalVarName = "__func__."; |
| 839 | break; |
| 840 | case PredefinedExpr::Function: |
| 841 | GlobalVarName = "__FUNCTION__."; |
| 842 | break; |
| 843 | case PredefinedExpr::PrettyFunction: |
| 844 | // FIXME:: Demangle C++ method names |
| 845 | GlobalVarName = "__PRETTY_FUNCTION__."; |
| 846 | break; |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 847 | } |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 848 | |
Chris Lattner | b5437d2 | 2009-04-23 05:30:27 +0000 | [diff] [blame] | 849 | // FIXME: This isn't right at all. The logic for computing this should go |
| 850 | // into a method on PredefinedExpr. This would allow sema and codegen to be |
| 851 | // consistent for things like sizeof(__func__) etc. |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 852 | std::string FunctionName; |
Chris Lattner | b5437d2 | 2009-04-23 05:30:27 +0000 | [diff] [blame] | 853 | if (const FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(CurCodeDecl)) { |
Douglas Gregor | 6ec3668 | 2009-02-18 23:53:56 +0000 | [diff] [blame] | 854 | FunctionName = CGM.getMangledName(FD); |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 855 | } else { |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 856 | // Just get the mangled name; skipping the asm prefix if it |
| 857 | // exists. |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 858 | FunctionName = CurFn->getName(); |
Daniel Dunbar | 6ab187a | 2009-04-07 05:48:37 +0000 | [diff] [blame] | 859 | if (FunctionName[0] == '\01') |
| 860 | FunctionName = FunctionName.substr(1, std::string::npos); |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 861 | } |
| 862 | |
Chris Lattner | c8aa5f1 | 2008-04-04 04:07:35 +0000 | [diff] [blame] | 863 | GlobalVarName += FunctionName; |
Daniel Dunbar | 662b71e | 2008-10-17 21:58:32 +0000 | [diff] [blame] | 864 | llvm::Constant *C = |
| 865 | CGM.GetAddrOfConstantCString(FunctionName, GlobalVarName.c_str()); |
| 866 | return LValue::MakeAddr(C, 0); |
| 867 | } |
| 868 | |
| 869 | LValue CodeGenFunction::EmitPredefinedLValue(const PredefinedExpr *E) { |
| 870 | switch (E->getIdentType()) { |
| 871 | default: |
| 872 | return EmitUnsupportedLValue(E, "predefined expression"); |
| 873 | case PredefinedExpr::Func: |
| 874 | case PredefinedExpr::Function: |
| 875 | case PredefinedExpr::PrettyFunction: |
| 876 | return EmitPredefinedFunctionName(E->getIdentType()); |
| 877 | } |
Anders Carlsson | 2274266 | 2007-07-21 05:21:51 +0000 | [diff] [blame] | 878 | } |
| 879 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 880 | LValue CodeGenFunction::EmitArraySubscriptExpr(const ArraySubscriptExpr *E) { |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 881 | // 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] | 882 | llvm::Value *Idx = EmitScalarExpr(E->getIdx()); |
Eli Friedman | 61d004a | 2009-06-06 19:09:26 +0000 | [diff] [blame] | 883 | QualType IdxTy = E->getIdx()->getType(); |
| 884 | bool IdxSigned = IdxTy->isSignedIntegerType(); |
| 885 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 886 | // If the base is a vector type, then we are forming a vector element lvalue |
| 887 | // with this subscript. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 888 | if (E->getBase()->getType()->isVectorType()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 889 | // Emit the vector as an lvalue to get its address. |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 890 | LValue LHS = EmitLValue(E->getBase()); |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 891 | assert(LHS.isSimple() && "Can only subscript lvalue vectors here!"); |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 892 | Idx = Builder.CreateIntCast(Idx, |
| 893 | llvm::Type::getInt32Ty(VMContext), IdxSigned, "vidx"); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 894 | return LValue::MakeVectorElt(LHS.getAddress(), Idx, |
| 895 | E->getBase()->getType().getCVRQualifiers()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 896 | } |
| 897 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 898 | // 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] | 899 | llvm::Value *Base = EmitScalarExpr(E->getBase()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 900 | |
Ted Kremenek | 2324512 | 2007-08-20 16:18:38 +0000 | [diff] [blame] | 901 | // Extend or truncate the index type to 32 or 64-bits. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 902 | unsigned IdxBitwidth = cast<llvm::IntegerType>(Idx->getType())->getBitWidth(); |
Sanjiv Gupta | 7cabee5 | 2009-04-24 02:40:57 +0000 | [diff] [blame] | 903 | if (IdxBitwidth != LLVMPointerWidth) |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 904 | Idx = Builder.CreateIntCast(Idx, |
| 905 | llvm::IntegerType::get(VMContext, LLVMPointerWidth), |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 906 | IdxSigned, "idxprom"); |
| 907 | |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 908 | // We know that the pointer points to a type of the correct size, |
| 909 | // unless the size is a VLA or Objective-C interface. |
| 910 | llvm::Value *Address = 0; |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 911 | if (const VariableArrayType *VAT = |
| 912 | getContext().getAsVariableArrayType(E->getType())) { |
Chris Lattner | 881eb9c | 2009-08-14 23:43:22 +0000 | [diff] [blame] | 913 | llvm::Value *VLASize = GetVLASize(VAT); |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 914 | |
| 915 | Idx = Builder.CreateMul(Idx, VLASize); |
| 916 | |
Anders Carlsson | 6183a99 | 2008-12-21 03:44:36 +0000 | [diff] [blame] | 917 | QualType BaseType = getContext().getBaseElementType(VAT); |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 918 | |
| 919 | uint64_t BaseTypeSize = getContext().getTypeSize(BaseType) / 8; |
| 920 | Idx = Builder.CreateUDiv(Idx, |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 921 | llvm::ConstantInt::get(Idx->getType(), |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 922 | BaseTypeSize)); |
Dan Gohman | 664f893 | 2009-08-12 00:33:55 +0000 | [diff] [blame] | 923 | Address = Builder.CreateInBoundsGEP(Base, Idx, "arrayidx"); |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 924 | } else if (const ObjCInterfaceType *OIT = |
| 925 | dyn_cast<ObjCInterfaceType>(E->getType())) { |
| 926 | llvm::Value *InterfaceSize = |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 927 | llvm::ConstantInt::get(Idx->getType(), |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 928 | getContext().getTypeSize(OIT) / 8); |
| 929 | |
| 930 | Idx = Builder.CreateMul(Idx, InterfaceSize); |
| 931 | |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 932 | llvm::Type *i8PTy = |
| 933 | llvm::PointerType::getUnqual(llvm::Type::getInt8Ty(VMContext)); |
Dan Gohman | 664f893 | 2009-08-12 00:33:55 +0000 | [diff] [blame] | 934 | Address = Builder.CreateGEP(Builder.CreateBitCast(Base, i8PTy), |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 935 | Idx, "arrayidx"); |
| 936 | Address = Builder.CreateBitCast(Address, Base->getType()); |
| 937 | } else { |
Dan Gohman | 664f893 | 2009-08-12 00:33:55 +0000 | [diff] [blame] | 938 | Address = Builder.CreateInBoundsGEP(Base, Idx, "arrayidx"); |
Anders Carlsson | 8b33c08 | 2008-12-21 00:11:23 +0000 | [diff] [blame] | 939 | } |
| 940 | |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 941 | QualType T = E->getBase()->getType()->getPointeeType(); |
| 942 | assert(!T.isNull() && |
| 943 | "CodeGenFunction::EmitArraySubscriptExpr(): Illegal base type"); |
| 944 | |
Daniel Dunbar | 2a86625 | 2009-04-25 05:08:32 +0000 | [diff] [blame] | 945 | LValue LV = LValue::MakeAddr(Address, |
Daniel Dunbar | f3ef07c | 2009-04-18 08:54:40 +0000 | [diff] [blame] | 946 | T.getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 947 | getContext().getObjCGCAttrKind(T), |
| 948 | E->getBase()->getType().getAddressSpace()); |
Fariborz Jahanian | 643887a | 2009-02-21 23:37:19 +0000 | [diff] [blame] | 949 | if (getContext().getLangOptions().ObjC1 && |
| 950 | getContext().getLangOptions().getGCMode() != LangOptions::NonGC) |
Fariborz Jahanian | 102e390 | 2009-06-01 21:29:32 +0000 | [diff] [blame] | 951 | LValue::SetObjCNonGC(LV, !E->isOBJCGCCandidate(getContext())); |
Fariborz Jahanian | 643887a | 2009-02-21 23:37:19 +0000 | [diff] [blame] | 952 | return LV; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 953 | } |
| 954 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 955 | static |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 956 | llvm::Constant *GenerateConstantVector(llvm::LLVMContext &VMContext, |
| 957 | llvm::SmallVector<unsigned, 4> &Elts) { |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 958 | llvm::SmallVector<llvm::Constant *, 4> CElts; |
| 959 | |
| 960 | for (unsigned i = 0, e = Elts.size(); i != e; ++i) |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 961 | CElts.push_back(llvm::ConstantInt::get( |
| 962 | llvm::Type::getInt32Ty(VMContext), Elts[i])); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 963 | |
Owen Anderson | 4a28932 | 2009-07-28 21:22:35 +0000 | [diff] [blame] | 964 | return llvm::ConstantVector::get(&CElts[0], CElts.size()); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 965 | } |
| 966 | |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 967 | LValue CodeGenFunction:: |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 968 | EmitExtVectorElementExpr(const ExtVectorElementExpr *E) { |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 969 | // Emit the base vector as an l-value. |
Chris Lattner | 73525de | 2009-02-16 21:11:58 +0000 | [diff] [blame] | 970 | LValue Base; |
| 971 | |
| 972 | // ExtVectorElementExpr's base can either be a vector or pointer to vector. |
Chris Lattner | 2140e90 | 2009-02-16 22:14:05 +0000 | [diff] [blame] | 973 | if (!E->isArrow()) { |
Chris Lattner | 73525de | 2009-02-16 21:11:58 +0000 | [diff] [blame] | 974 | assert(E->getBase()->getType()->isVectorType()); |
| 975 | Base = EmitLValue(E->getBase()); |
Chris Lattner | 2140e90 | 2009-02-16 22:14:05 +0000 | [diff] [blame] | 976 | } else { |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 977 | const PointerType *PT = E->getBase()->getType()->getAs<PointerType>(); |
Chris Lattner | 2140e90 | 2009-02-16 22:14:05 +0000 | [diff] [blame] | 978 | llvm::Value *Ptr = EmitScalarExpr(E->getBase()); |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 979 | Base = LValue::MakeAddr(Ptr, PT->getPointeeType().getCVRQualifiers(), |
| 980 | QualType::GCNone, |
| 981 | PT->getPointeeType().getAddressSpace()); |
Chris Lattner | 73525de | 2009-02-16 21:11:58 +0000 | [diff] [blame] | 982 | } |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 983 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 984 | // Encode the element access list into a vector of unsigned indices. |
| 985 | llvm::SmallVector<unsigned, 4> Indices; |
| 986 | E->getEncodedElementAccess(Indices); |
| 987 | |
| 988 | if (Base.isSimple()) { |
Owen Anderson | a1cf15f | 2009-07-14 23:10:40 +0000 | [diff] [blame] | 989 | llvm::Constant *CV = GenerateConstantVector(VMContext, Indices); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 990 | return LValue::MakeExtVectorElt(Base.getAddress(), CV, |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 991 | Base.getQualifiers()); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 992 | } |
| 993 | assert(Base.isExtVectorElt() && "Can only subscript lvalue vec elts here!"); |
| 994 | |
| 995 | llvm::Constant *BaseElts = Base.getExtVectorElts(); |
| 996 | llvm::SmallVector<llvm::Constant *, 4> CElts; |
| 997 | |
| 998 | for (unsigned i = 0, e = Indices.size(); i != e; ++i) { |
| 999 | if (isa<llvm::ConstantAggregateZero>(BaseElts)) |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1000 | CElts.push_back(llvm::ConstantInt::get( |
| 1001 | llvm::Type::getInt32Ty(VMContext), 0)); |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1002 | else |
| 1003 | CElts.push_back(BaseElts->getOperand(Indices[i])); |
| 1004 | } |
Owen Anderson | 4a28932 | 2009-07-28 21:22:35 +0000 | [diff] [blame] | 1005 | llvm::Constant *CV = llvm::ConstantVector::get(&CElts[0], CElts.size()); |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1006 | return LValue::MakeExtVectorElt(Base.getExtVectorAddr(), CV, |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 1007 | Base.getQualifiers()); |
Chris Lattner | 349aaec | 2007-08-02 23:37:31 +0000 | [diff] [blame] | 1008 | } |
| 1009 | |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1010 | LValue CodeGenFunction::EmitMemberExpr(const MemberExpr *E) { |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 1011 | bool isUnion = false; |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 1012 | bool isIvar = false; |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 1013 | bool isNonGC = false; |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 1014 | Expr *BaseExpr = E->getBase(); |
Devang Patel | 126a856 | 2007-10-24 22:26:28 +0000 | [diff] [blame] | 1015 | llvm::Value *BaseValue = NULL; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1016 | unsigned CVRQualifiers=0; |
| 1017 | |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1018 | // 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] | 1019 | if (E->isArrow()) { |
Devang Patel | 0a96118 | 2007-10-26 18:15:21 +0000 | [diff] [blame] | 1020 | BaseValue = EmitScalarExpr(BaseExpr); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 1021 | const PointerType *PTy = |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 1022 | BaseExpr->getType()->getAs<PointerType>(); |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 1023 | if (PTy->getPointeeType()->isUnionType()) |
| 1024 | isUnion = true; |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1025 | CVRQualifiers = PTy->getPointeeType().getCVRQualifiers(); |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 1026 | } else if (isa<ObjCPropertyRefExpr>(BaseExpr) || |
| 1027 | isa<ObjCKVCRefExpr>(BaseExpr)) { |
Fariborz Jahanian | 35c3329 | 2009-01-12 23:27:26 +0000 | [diff] [blame] | 1028 | RValue RV = EmitObjCPropertyGet(BaseExpr); |
| 1029 | BaseValue = RV.getAggregateAddr(); |
| 1030 | if (BaseExpr->getType()->isUnionType()) |
| 1031 | isUnion = true; |
| 1032 | CVRQualifiers = BaseExpr->getType().getCVRQualifiers(); |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 1033 | } else { |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1034 | LValue BaseLV = EmitLValue(BaseExpr); |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 1035 | if (BaseLV.isObjCIvar()) |
| 1036 | isIvar = true; |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 1037 | if (BaseLV.isNonGC()) |
| 1038 | isNonGC = true; |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1039 | // FIXME: this isn't right for bitfields. |
| 1040 | BaseValue = BaseLV.getAddress(); |
Fariborz Jahanian | a91d6a6 | 2009-07-29 00:44:13 +0000 | [diff] [blame] | 1041 | QualType BaseTy = BaseExpr->getType(); |
| 1042 | if (BaseTy->isUnionType()) |
Devang Patel | fe2419a | 2007-12-11 21:33:16 +0000 | [diff] [blame] | 1043 | isUnion = true; |
Fariborz Jahanian | a91d6a6 | 2009-07-29 00:44:13 +0000 | [diff] [blame] | 1044 | CVRQualifiers = BaseTy.getCVRQualifiers(); |
Chris Lattner | 12f65f6 | 2007-12-02 18:52:07 +0000 | [diff] [blame] | 1045 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1046 | |
Douglas Gregor | 86f1940 | 2008-12-20 23:49:58 +0000 | [diff] [blame] | 1047 | FieldDecl *Field = dyn_cast<FieldDecl>(E->getMemberDecl()); |
| 1048 | // FIXME: Handle non-field member expressions |
| 1049 | assert(Field && "No code generation for non-field member references"); |
Chris Lattner | 1bd885e | 2009-02-16 22:25:49 +0000 | [diff] [blame] | 1050 | LValue MemExpLV = EmitLValueForField(BaseValue, Field, isUnion, |
| 1051 | CVRQualifiers); |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 1052 | LValue::SetObjCIvar(MemExpLV, isIvar); |
Fariborz Jahanian | 4f676ed | 2009-02-21 00:30:43 +0000 | [diff] [blame] | 1053 | LValue::SetObjCNonGC(MemExpLV, isNonGC); |
Fariborz Jahanian | 2ab1968 | 2008-11-21 18:14:01 +0000 | [diff] [blame] | 1054 | return MemExpLV; |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 1055 | } |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1056 | |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 1057 | LValue CodeGenFunction::EmitLValueForBitfield(llvm::Value* BaseValue, |
| 1058 | FieldDecl* Field, |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 1059 | unsigned CVRQualifiers) { |
Anders Carlsson | 8330cee | 2009-07-23 17:01:21 +0000 | [diff] [blame] | 1060 | CodeGenTypes::BitFieldInfo Info = CGM.getTypes().getBitFieldInfo(Field); |
| 1061 | |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 1062 | // FIXME: CodeGenTypes should expose a method to get the appropriate type for |
| 1063 | // FieldTy (the appropriate type is ABI-dependent). |
Daniel Dunbar | bb76773 | 2009-02-17 18:31:04 +0000 | [diff] [blame] | 1064 | const llvm::Type *FieldTy = |
| 1065 | CGM.getTypes().ConvertTypeForMem(Field->getType()); |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 1066 | const llvm::PointerType *BaseTy = |
| 1067 | cast<llvm::PointerType>(BaseValue->getType()); |
| 1068 | unsigned AS = BaseTy->getAddressSpace(); |
| 1069 | BaseValue = Builder.CreateBitCast(BaseValue, |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1070 | llvm::PointerType::get(FieldTy, AS), |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 1071 | "tmp"); |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 1072 | |
Anders Carlsson | 8330cee | 2009-07-23 17:01:21 +0000 | [diff] [blame] | 1073 | llvm::Value *Idx = |
Owen Anderson | 0032b27 | 2009-08-13 21:57:51 +0000 | [diff] [blame] | 1074 | llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), Info.FieldNo); |
Anders Carlsson | 8330cee | 2009-07-23 17:01:21 +0000 | [diff] [blame] | 1075 | llvm::Value *V = Builder.CreateGEP(BaseValue, Idx, "tmp"); |
| 1076 | |
| 1077 | return LValue::MakeBitfield(V, Info.Start, Info.Size, |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 1078 | Field->getType()->isSignedIntegerType(), |
| 1079 | Field->getType().getCVRQualifiers()|CVRQualifiers); |
| 1080 | } |
| 1081 | |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 1082 | LValue CodeGenFunction::EmitLValueForField(llvm::Value* BaseValue, |
| 1083 | FieldDecl* Field, |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1084 | bool isUnion, |
| 1085 | unsigned CVRQualifiers) |
Eli Friedman | 472778e | 2008-02-09 08:50:58 +0000 | [diff] [blame] | 1086 | { |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 1087 | if (Field->isBitField()) |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 1088 | return EmitLValueForBitfield(BaseValue, Field, CVRQualifiers); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 1089 | |
Fariborz Jahanian | 598d3f6 | 2009-02-03 19:03:09 +0000 | [diff] [blame] | 1090 | unsigned idx = CGM.getTypes().getLLVMFieldNo(Field); |
Fariborz Jahanian | fd64bb6 | 2008-12-15 20:35:07 +0000 | [diff] [blame] | 1091 | llvm::Value *V = Builder.CreateStructGEP(BaseValue, idx, "tmp"); |
Eli Friedman | 1e86b34 | 2008-05-29 11:33:25 +0000 | [diff] [blame] | 1092 | |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 1093 | // Match union field type. |
Lauro Ramos Venancio | d957aa0 | 2008-02-07 19:29:53 +0000 | [diff] [blame] | 1094 | if (isUnion) { |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1095 | const llvm::Type *FieldTy = |
| 1096 | CGM.getTypes().ConvertTypeForMem(Field->getType()); |
Devang Patel | e9b8c0a | 2007-10-30 20:59:40 +0000 | [diff] [blame] | 1097 | const llvm::PointerType * BaseTy = |
| 1098 | cast<llvm::PointerType>(BaseValue->getType()); |
Eli Friedman | 788d571 | 2008-05-21 13:24:44 +0000 | [diff] [blame] | 1099 | unsigned AS = BaseTy->getAddressSpace(); |
| 1100 | V = Builder.CreateBitCast(V, |
Owen Anderson | 96e0fc7 | 2009-07-29 22:16:19 +0000 | [diff] [blame] | 1101 | llvm::PointerType::get(FieldTy, AS), |
Eli Friedman | 788d571 | 2008-05-21 13:24:44 +0000 | [diff] [blame] | 1102 | "tmp"); |
Devang Patel | abad06c | 2007-10-26 19:42:18 +0000 | [diff] [blame] | 1103 | } |
Eli Friedman | 2be5861 | 2009-05-30 21:09:44 +0000 | [diff] [blame] | 1104 | if (Field->getType()->isReferenceType()) |
| 1105 | V = Builder.CreateLoad(V, "tmp"); |
Lauro Ramos Venancio | 3b8c22d | 2008-01-22 20:17:04 +0000 | [diff] [blame] | 1106 | |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 1107 | QualType::GCAttrTypes attr = QualType::GCNone; |
Fariborz Jahanian | ba372b8 | 2009-02-18 17:52:36 +0000 | [diff] [blame] | 1108 | if (CGM.getLangOptions().ObjC1 && |
Fariborz Jahanian | 5934e75 | 2009-02-18 18:52:41 +0000 | [diff] [blame] | 1109 | CGM.getLangOptions().getGCMode() != LangOptions::NonGC) { |
| 1110 | QualType Ty = Field->getType(); |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 1111 | attr = Ty.getObjCGCAttr(); |
Fariborz Jahanian | c1debf3 | 2009-02-19 00:48:05 +0000 | [diff] [blame] | 1112 | if (attr != QualType::GCNone) { |
Fariborz Jahanian | 5934e75 | 2009-02-18 18:52:41 +0000 | [diff] [blame] | 1113 | // __weak attribute on a field is ignored. |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 1114 | if (attr == QualType::Weak) |
| 1115 | attr = QualType::GCNone; |
Mike Stump | b3589f4 | 2009-07-30 22:28:39 +0000 | [diff] [blame] | 1116 | } else if (Ty->isObjCObjectPointerType()) |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 1117 | attr = QualType::Strong; |
Fariborz Jahanian | 5934e75 | 2009-02-18 18:52:41 +0000 | [diff] [blame] | 1118 | } |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 1119 | LValue LV = |
| 1120 | LValue::MakeAddr(V, |
| 1121 | Field->getType().getCVRQualifiers()|CVRQualifiers, |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 1122 | attr, |
| 1123 | Field->getType().getAddressSpace()); |
Fariborz Jahanian | 2682d8b | 2008-11-20 00:15:42 +0000 | [diff] [blame] | 1124 | return LV; |
Devang Patel | b9b00ad | 2007-10-23 20:28:39 +0000 | [diff] [blame] | 1125 | } |
| 1126 | |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 1127 | LValue CodeGenFunction::EmitCompoundLiteralLValue(const CompoundLiteralExpr* E){ |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 1128 | const llvm::Type *LTy = ConvertType(E->getType()); |
| 1129 | llvm::Value *DeclPtr = CreateTempAlloca(LTy, ".compoundliteral"); |
| 1130 | |
| 1131 | const Expr* InitExpr = E->getInitializer(); |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 1132 | LValue Result = LValue::MakeAddr(DeclPtr, E->getType().getCVRQualifiers(), |
| 1133 | QualType::GCNone, |
| 1134 | E->getType().getAddressSpace()); |
Eli Friedman | 06e863f | 2008-05-13 23:18:27 +0000 | [diff] [blame] | 1135 | |
| 1136 | if (E->getType()->isComplexType()) { |
| 1137 | EmitComplexExprIntoAddr(InitExpr, DeclPtr, false); |
| 1138 | } else if (hasAggregateLLVMType(E->getType())) { |
| 1139 | EmitAnyExpr(InitExpr, DeclPtr, false); |
| 1140 | } else { |
| 1141 | EmitStoreThroughLValue(EmitAnyExpr(InitExpr), Result, E->getType()); |
| 1142 | } |
| 1143 | |
| 1144 | return Result; |
| 1145 | } |
| 1146 | |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 1147 | LValue CodeGenFunction::EmitConditionalOperator(const ConditionalOperator* E) { |
Eli Friedman | d254a25 | 2009-07-30 01:10:26 +0000 | [diff] [blame] | 1148 | if (E->isLvalue(getContext()) == Expr::LV_Valid) |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 1149 | return EmitUnsupportedLValue(E, "conditional operator"); |
| 1150 | |
| 1151 | // ?: here should be an aggregate. |
| 1152 | assert((hasAggregateLLVMType(E->getType()) && |
| 1153 | !E->getType()->isAnyComplexType()) && |
| 1154 | "Unexpected conditional operator!"); |
| 1155 | |
| 1156 | llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType())); |
| 1157 | EmitAggExpr(E, Temp, false); |
| 1158 | |
| 1159 | return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 1160 | getContext().getObjCGCAttrKind(E->getType()), |
| 1161 | E->getType().getAddressSpace()); |
Daniel Dunbar | 9034558 | 2009-03-24 02:38:23 +0000 | [diff] [blame] | 1162 | |
| 1163 | } |
| 1164 | |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 1165 | /// EmitCastLValue - Casts are never lvalues. If a cast is needed by the code |
| 1166 | /// generator in an lvalue context, then it must mean that we need the address |
| 1167 | /// of an aggregate in order to access one of its fields. This can happen for |
| 1168 | /// all the reasons that casts are permitted with aggregate result, including |
| 1169 | /// noop aggregate casts, and cast from scalar to union. |
| 1170 | LValue CodeGenFunction::EmitCastLValue(const CastExpr *E) { |
| 1171 | // If this is an aggregate-to-aggregate cast, just use the input's address as |
| 1172 | // the lvalue. |
| 1173 | if (getContext().hasSameUnqualifiedType(E->getType(), |
| 1174 | E->getSubExpr()->getType())) |
| 1175 | return EmitLValue(E->getSubExpr()); |
| 1176 | |
| 1177 | // Otherwise, we must have a cast from scalar to union. |
| 1178 | assert(E->getType()->isUnionType() && "Expected scalar-to-union cast"); |
| 1179 | |
| 1180 | // Casts are only lvalues when the source and destination types are the same. |
| 1181 | llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType())); |
Chris Lattner | 40f9292 | 2009-03-18 18:30:44 +0000 | [diff] [blame] | 1182 | EmitAnyExpr(E->getSubExpr(), Temp, false); |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 1183 | |
| 1184 | return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 1185 | getContext().getObjCGCAttrKind(E->getType()), |
| 1186 | E->getType().getAddressSpace()); |
Chris Lattner | 75dfeda | 2009-03-18 18:28:57 +0000 | [diff] [blame] | 1187 | } |
| 1188 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1189 | //===--------------------------------------------------------------------===// |
| 1190 | // Expression Emission |
| 1191 | //===--------------------------------------------------------------------===// |
| 1192 | |
Chris Lattner | 7016a70 | 2007-08-20 22:37:10 +0000 | [diff] [blame] | 1193 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1194 | RValue CodeGenFunction::EmitCallExpr(const CallExpr *E) { |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 1195 | // Builtins never have block type. |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 1196 | if (E->getCallee()->getType()->isBlockPointerType()) |
Anders Carlsson | acfde80 | 2009-02-12 00:39:25 +0000 | [diff] [blame] | 1197 | return EmitBlockCallExpr(E); |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 1198 | |
Anders Carlsson | 774e7c6 | 2009-04-03 22:50:24 +0000 | [diff] [blame] | 1199 | if (const CXXMemberCallExpr *CE = dyn_cast<CXXMemberCallExpr>(E)) |
| 1200 | return EmitCXXMemberCallExpr(CE); |
| 1201 | |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 1202 | const Decl *TargetDecl = 0; |
Daniel Dunbar | dd7b897 | 2009-02-20 19:34:33 +0000 | [diff] [blame] | 1203 | if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E->getCallee())) { |
| 1204 | if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CE->getSubExpr())) { |
| 1205 | TargetDecl = DRE->getDecl(); |
| 1206 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(TargetDecl)) |
| 1207 | if (unsigned builtinID = FD->getBuiltinID(getContext())) |
| 1208 | return EmitBuiltinExpr(FD, builtinID, E); |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 1209 | } |
| 1210 | } |
| 1211 | |
Chris Lattner | 5db7ae5 | 2009-06-13 00:26:38 +0000 | [diff] [blame] | 1212 | if (const CXXOperatorCallExpr *CE = dyn_cast<CXXOperatorCallExpr>(E)) |
Anders Carlsson | 0f29463 | 2009-05-27 04:18:27 +0000 | [diff] [blame] | 1213 | if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(TargetDecl)) |
| 1214 | return EmitCXXOperatorMemberCallExpr(CE, MD); |
Anders Carlsson | 0f29463 | 2009-05-27 04:18:27 +0000 | [diff] [blame] | 1215 | |
Chris Lattner | 7f02f72 | 2007-08-24 05:35:26 +0000 | [diff] [blame] | 1216 | llvm::Value *Callee = EmitScalarExpr(E->getCallee()); |
Anders Carlsson | 9864771 | 2009-05-27 01:22:39 +0000 | [diff] [blame] | 1217 | return EmitCall(Callee, E->getCallee()->getType(), |
| 1218 | E->arg_begin(), E->arg_end(), TargetDecl); |
Chris Lattner | c5e940f | 2007-08-31 04:44:06 +0000 | [diff] [blame] | 1219 | } |
| 1220 | |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 1221 | LValue CodeGenFunction::EmitBinaryOperatorLValue(const BinaryOperator *E) { |
Chris Lattner | 7a574cc | 2009-05-12 21:28:12 +0000 | [diff] [blame] | 1222 | // Comma expressions just emit their LHS then their RHS as an l-value. |
| 1223 | if (E->getOpcode() == BinaryOperator::Comma) { |
| 1224 | EmitAnyExpr(E->getLHS()); |
| 1225 | return EmitLValue(E->getRHS()); |
| 1226 | } |
| 1227 | |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 1228 | // Can only get l-value for binary operator expressions which are a |
| 1229 | // simple assignment of aggregate type. |
| 1230 | if (E->getOpcode() != BinaryOperator::Assign) |
| 1231 | return EmitUnsupportedLValue(E, "binary l-value expression"); |
| 1232 | |
| 1233 | llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType())); |
| 1234 | EmitAggExpr(E, Temp, false); |
| 1235 | // FIXME: Are these qualifiers correct? |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 1236 | return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 1237 | getContext().getObjCGCAttrKind(E->getType()), |
| 1238 | E->getType().getAddressSpace()); |
Daniel Dunbar | 80e62c2 | 2008-09-04 03:20:13 +0000 | [diff] [blame] | 1239 | } |
| 1240 | |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 1241 | LValue CodeGenFunction::EmitCallExprLValue(const CallExpr *E) { |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 1242 | RValue RV = EmitCallExpr(E); |
Anders Carlsson | 4826568 | 2009-05-27 01:45:47 +0000 | [diff] [blame] | 1243 | |
| 1244 | if (RV.isScalar()) { |
| 1245 | assert(E->getCallReturnType()->isReferenceType() && |
| 1246 | "Can't have a scalar return unless the return type is a " |
| 1247 | "reference type!"); |
| 1248 | |
| 1249 | return LValue::MakeAddr(RV.getScalarVal(), E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 1250 | getContext().getObjCGCAttrKind(E->getType()), |
| 1251 | E->getType().getAddressSpace()); |
Anders Carlsson | 4826568 | 2009-05-27 01:45:47 +0000 | [diff] [blame] | 1252 | } |
| 1253 | |
Eli Friedman | 1e692ac | 2008-06-13 23:01:12 +0000 | [diff] [blame] | 1254 | return LValue::MakeAddr(RV.getAggregateAddr(), |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 1255 | E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 1256 | getContext().getObjCGCAttrKind(E->getType()), |
| 1257 | E->getType().getAddressSpace()); |
Christopher Lamb | 22c940e | 2007-12-29 05:02:41 +0000 | [diff] [blame] | 1258 | } |
| 1259 | |
Daniel Dunbar | 5b5c9ef | 2009-02-11 20:59:32 +0000 | [diff] [blame] | 1260 | LValue CodeGenFunction::EmitVAArgExprLValue(const VAArgExpr *E) { |
| 1261 | // FIXME: This shouldn't require another copy. |
| 1262 | llvm::Value *Temp = CreateTempAlloca(ConvertType(E->getType())); |
| 1263 | EmitAggExpr(E, Temp, false); |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 1264 | return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers(), |
| 1265 | QualType::GCNone, E->getType().getAddressSpace()); |
Daniel Dunbar | 5b5c9ef | 2009-02-11 20:59:32 +0000 | [diff] [blame] | 1266 | } |
| 1267 | |
Argyrios Kyrtzidis | e3a09e6 | 2008-09-10 02:36:38 +0000 | [diff] [blame] | 1268 | LValue |
| 1269 | CodeGenFunction::EmitCXXConditionDeclLValue(const CXXConditionDeclExpr *E) { |
| 1270 | EmitLocalBlockVarDecl(*E->getVarDecl()); |
| 1271 | return EmitDeclRefLValue(E); |
| 1272 | } |
| 1273 | |
Anders Carlsson | b58d017 | 2009-05-30 23:23:33 +0000 | [diff] [blame] | 1274 | LValue CodeGenFunction::EmitCXXConstructLValue(const CXXConstructExpr *E) { |
| 1275 | llvm::Value *Temp = CreateTempAlloca(ConvertTypeForMem(E->getType()), "tmp"); |
| 1276 | EmitCXXConstructExpr(Temp, E); |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 1277 | return LValue::MakeAddr(Temp, E->getType().getCVRQualifiers(), |
| 1278 | QualType::GCNone, E->getType().getAddressSpace()); |
Anders Carlsson | b58d017 | 2009-05-30 23:23:33 +0000 | [diff] [blame] | 1279 | } |
| 1280 | |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 1281 | LValue |
| 1282 | CodeGenFunction::EmitCXXBindTemporaryLValue(const CXXBindTemporaryExpr *E) { |
| 1283 | LValue LV = EmitLValue(E->getSubExpr()); |
| 1284 | |
Anders Carlsson | 543ac0c | 2009-05-31 00:34:10 +0000 | [diff] [blame] | 1285 | PushCXXTemporary(E->getTemporary(), LV.getAddress()); |
Anders Carlsson | e61c9e8 | 2009-05-30 23:30:54 +0000 | [diff] [blame] | 1286 | |
| 1287 | return LV; |
| 1288 | } |
| 1289 | |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 1290 | LValue CodeGenFunction::EmitObjCMessageExprLValue(const ObjCMessageExpr *E) { |
| 1291 | // Can only get l-value for message expression returning aggregate type |
| 1292 | RValue RV = EmitObjCMessageExpr(E); |
| 1293 | // FIXME: can this be volatile? |
| 1294 | return LValue::MakeAddr(RV.getAggregateAddr(), |
Fariborz Jahanian | a223cca | 2009-02-19 23:36:06 +0000 | [diff] [blame] | 1295 | E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 1296 | getContext().getObjCGCAttrKind(E->getType()), |
| 1297 | E->getType().getAddressSpace()); |
Daniel Dunbar | 0a04d77 | 2008-08-23 10:51:21 +0000 | [diff] [blame] | 1298 | } |
| 1299 | |
Daniel Dunbar | 2a03192 | 2009-04-22 05:08:15 +0000 | [diff] [blame] | 1300 | llvm::Value *CodeGenFunction::EmitIvarOffset(const ObjCInterfaceDecl *Interface, |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 1301 | const ObjCIvarDecl *Ivar) { |
Fariborz Jahanian | f63aa3f | 2009-02-10 19:02:04 +0000 | [diff] [blame] | 1302 | return CGM.getObjCRuntime().EmitIvarOffset(*this, Interface, Ivar); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 1303 | } |
| 1304 | |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 1305 | LValue CodeGenFunction::EmitLValueForIvar(QualType ObjectTy, |
| 1306 | llvm::Value *BaseValue, |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 1307 | const ObjCIvarDecl *Ivar, |
| 1308 | unsigned CVRQualifiers) { |
Chris Lattner | 26f074b | 2009-04-17 17:44:48 +0000 | [diff] [blame] | 1309 | return CGM.getObjCRuntime().EmitObjCValueForIvar(*this, ObjectTy, BaseValue, |
Daniel Dunbar | 525c9b7 | 2009-04-21 01:19:28 +0000 | [diff] [blame] | 1310 | Ivar, CVRQualifiers); |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 1311 | } |
| 1312 | |
| 1313 | LValue CodeGenFunction::EmitObjCIvarRefLValue(const ObjCIvarRefExpr *E) { |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 1314 | // FIXME: A lot of the code below could be shared with EmitMemberExpr. |
| 1315 | llvm::Value *BaseValue = 0; |
| 1316 | const Expr *BaseExpr = E->getBase(); |
| 1317 | unsigned CVRQualifiers = 0; |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 1318 | QualType ObjectTy; |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 1319 | if (E->isArrow()) { |
| 1320 | BaseValue = EmitScalarExpr(BaseExpr); |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 1321 | ObjectTy = BaseExpr->getType()->getPointeeType(); |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 1322 | CVRQualifiers = ObjectTy.getCVRQualifiers(); |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 1323 | } else { |
| 1324 | LValue BaseLV = EmitLValue(BaseExpr); |
| 1325 | // FIXME: this isn't right for bitfields. |
| 1326 | BaseValue = BaseLV.getAddress(); |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 1327 | ObjectTy = BaseExpr->getType(); |
| 1328 | CVRQualifiers = ObjectTy.getCVRQualifiers(); |
Anders Carlsson | 29b7e50 | 2008-08-25 01:53:23 +0000 | [diff] [blame] | 1329 | } |
Daniel Dunbar | 29e0bcc | 2008-09-24 04:00:38 +0000 | [diff] [blame] | 1330 | |
Daniel Dunbar | 525c9b7 | 2009-04-21 01:19:28 +0000 | [diff] [blame] | 1331 | return EmitLValueForIvar(ObjectTy, BaseValue, E->getDecl(), CVRQualifiers); |
Chris Lattner | 391d77a | 2008-03-30 23:03:07 +0000 | [diff] [blame] | 1332 | } |
| 1333 | |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 1334 | LValue |
| 1335 | CodeGenFunction::EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E) { |
| 1336 | // This is a special l-value that just issues sends when we load or |
| 1337 | // store through it. |
| 1338 | return LValue::MakePropertyRef(E, E->getType().getCVRQualifiers()); |
| 1339 | } |
| 1340 | |
Fariborz Jahanian | 43f4470 | 2008-11-22 22:30:21 +0000 | [diff] [blame] | 1341 | LValue |
| 1342 | CodeGenFunction::EmitObjCKVCRefLValue(const ObjCKVCRefExpr *E) { |
| 1343 | // This is a special l-value that just issues sends when we load or |
| 1344 | // store through it. |
| 1345 | return LValue::MakeKVCRef(E, E->getType().getCVRQualifiers()); |
| 1346 | } |
| 1347 | |
Douglas Gregor | cd9b46e | 2008-11-04 14:56:14 +0000 | [diff] [blame] | 1348 | LValue |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 1349 | CodeGenFunction::EmitObjCSuperExprLValue(const ObjCSuperExpr *E) { |
Douglas Gregor | cd9b46e | 2008-11-04 14:56:14 +0000 | [diff] [blame] | 1350 | return EmitUnsupportedLValue(E, "use of super"); |
| 1351 | } |
| 1352 | |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 1353 | LValue CodeGenFunction::EmitStmtExprLValue(const StmtExpr *E) { |
| 1354 | |
| 1355 | // Can only get l-value for message expression returning aggregate type |
| 1356 | RValue RV = EmitAnyExprToTemp(E); |
| 1357 | // FIXME: can this be volatile? |
| 1358 | return LValue::MakeAddr(RV.getAggregateAddr(), |
| 1359 | E->getType().getCVRQualifiers(), |
Mon P Wang | c6a38a4 | 2009-07-22 03:08:17 +0000 | [diff] [blame] | 1360 | getContext().getObjCGCAttrKind(E->getType()), |
| 1361 | E->getType().getAddressSpace()); |
Chris Lattner | 6545994 | 2009-04-25 19:35:26 +0000 | [diff] [blame] | 1362 | } |
| 1363 | |
| 1364 | |
Anders Carlsson | 9864771 | 2009-05-27 01:22:39 +0000 | [diff] [blame] | 1365 | RValue CodeGenFunction::EmitCall(llvm::Value *Callee, QualType CalleeType, |
| 1366 | CallExpr::const_arg_iterator ArgBeg, |
| 1367 | CallExpr::const_arg_iterator ArgEnd, |
| 1368 | const Decl *TargetDecl) { |
Daniel Dunbar | ce1d38b | 2009-01-09 16:50:52 +0000 | [diff] [blame] | 1369 | // Get the actual function type. The callee type will always be a |
| 1370 | // pointer to function type or a block pointer type. |
Anders Carlsson | 8ac67a7 | 2009-04-07 18:53:02 +0000 | [diff] [blame] | 1371 | assert(CalleeType->isFunctionPointerType() && |
| 1372 | "Call must have function pointer type!"); |
| 1373 | |
Ted Kremenek | 6217b80 | 2009-07-29 21:53:49 +0000 | [diff] [blame] | 1374 | QualType FnType = CalleeType->getAs<PointerType>()->getPointeeType(); |
Anders Carlsson | 8ac67a7 | 2009-04-07 18:53:02 +0000 | [diff] [blame] | 1375 | QualType ResultType = FnType->getAsFunctionType()->getResultType(); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 1376 | |
| 1377 | CallArgList Args; |
Anders Carlsson | 782f397 | 2009-04-08 23:13:16 +0000 | [diff] [blame] | 1378 | EmitCallArgs(Args, FnType->getAsFunctionProtoType(), ArgBeg, ArgEnd); |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 1379 | |
Daniel Dunbar | 541b63b | 2009-02-02 23:23:47 +0000 | [diff] [blame] | 1380 | return EmitCall(CGM.getTypes().getFunctionInfo(ResultType, Args), |
Daniel Dunbar | c0ef9f5 | 2009-02-20 18:06:48 +0000 | [diff] [blame] | 1381 | Callee, Args, TargetDecl); |
Daniel Dunbar | 8f2926b | 2008-08-23 03:46:30 +0000 | [diff] [blame] | 1382 | } |