Anders Carlsson | 5508518 | 2007-08-21 17:43:55 +0000 | [diff] [blame] | 1 | //===---- CGBuiltin.cpp - Emit LLVM Code for builtins ---------------------===// |
| 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. |
Anders Carlsson | 5508518 | 2007-08-21 17:43:55 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This contains code to emit Objective-C code as LLVM code. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
Devang Patel | bcbd03a | 2011-01-19 01:36:36 +0000 | [diff] [blame] | 14 | #include "CGDebugInfo.h" |
Ted Kremenek | 2979ec7 | 2008-04-09 15:51:31 +0000 | [diff] [blame] | 15 | #include "CGObjCRuntime.h" |
Anders Carlsson | 5508518 | 2007-08-21 17:43:55 +0000 | [diff] [blame] | 16 | #include "CodeGenFunction.h" |
| 17 | #include "CodeGenModule.h" |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 18 | #include "TargetInfo.h" |
Daniel Dunbar | 85c59ed | 2008-08-29 08:11:39 +0000 | [diff] [blame] | 19 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 20 | #include "clang/AST/DeclObjC.h" |
Chris Lattner | 16f0049 | 2009-04-26 01:32:48 +0000 | [diff] [blame] | 21 | #include "clang/AST/StmtObjC.h" |
Daniel Dunbar | e66f4e3 | 2008-09-03 00:27:26 +0000 | [diff] [blame] | 22 | #include "clang/Basic/Diagnostic.h" |
Mark Lacey | 8b54999 | 2013-10-30 21:53:58 +0000 | [diff] [blame] | 23 | #include "clang/CodeGen/CGFunctionInfo.h" |
Anders Carlsson | 3d8400d | 2008-08-30 19:51:14 +0000 | [diff] [blame] | 24 | #include "llvm/ADT/STLExtras.h" |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 25 | #include "llvm/IR/CallSite.h" |
Chandler Carruth | 3b844ba | 2013-01-02 11:45:17 +0000 | [diff] [blame] | 26 | #include "llvm/IR/DataLayout.h" |
| 27 | #include "llvm/IR/InlineAsm.h" |
Anders Carlsson | 5508518 | 2007-08-21 17:43:55 +0000 | [diff] [blame] | 28 | using namespace clang; |
| 29 | using namespace CodeGen; |
| 30 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 31 | typedef llvm::PointerIntPair<llvm::Value*,1,bool> TryEmitResult; |
| 32 | static TryEmitResult |
| 33 | tryEmitARCRetainScalarExpr(CodeGenFunction &CGF, const Expr *e); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 34 | static RValue AdjustRelatedResultType(CodeGenFunction &CGF, |
Fariborz Jahanian | 490a52b | 2012-05-29 19:56:01 +0000 | [diff] [blame] | 35 | QualType ET, |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 36 | const ObjCMethodDecl *Method, |
| 37 | RValue Result); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 38 | |
| 39 | /// Given the address of a variable of pointer type, find the correct |
| 40 | /// null to store into it. |
| 41 | static llvm::Constant *getNullForVariable(llvm::Value *addr) { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 42 | llvm::Type *type = |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 43 | cast<llvm::PointerType>(addr->getType())->getElementType(); |
| 44 | return llvm::ConstantPointerNull::get(cast<llvm::PointerType>(type)); |
| 45 | } |
| 46 | |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 47 | /// Emits an instance of NSConstantString representing the object. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 48 | llvm::Value *CodeGenFunction::EmitObjCStringLiteral(const ObjCStringLiteral *E) |
Daniel Dunbar | 71fcec9 | 2008-11-25 21:53:21 +0000 | [diff] [blame] | 49 | { |
David Chisnall | 0d13f6f | 2010-01-23 02:40:42 +0000 | [diff] [blame] | 50 | llvm::Constant *C = |
| 51 | CGM.getObjCRuntime().GenerateConstantString(E->getString()); |
Daniel Dunbar | ed7c618 | 2008-08-20 00:28:19 +0000 | [diff] [blame] | 52 | // FIXME: This bitcast should just be made an invariant on the Runtime. |
Owen Anderson | 3c4972d | 2009-07-29 18:54:39 +0000 | [diff] [blame] | 53 | return llvm::ConstantExpr::getBitCast(C, ConvertType(E->getType())); |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 54 | } |
| 55 | |
Patrick Beard | eb382ec | 2012-04-19 00:25:12 +0000 | [diff] [blame] | 56 | /// EmitObjCBoxedExpr - This routine generates code to call |
| 57 | /// the appropriate expression boxing method. This will either be |
| 58 | /// one of +[NSNumber numberWith<Type>:], or +[NSString stringWithUTF8String:]. |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 59 | /// |
Eric Christopher | 16098f3 | 2012-03-29 17:31:31 +0000 | [diff] [blame] | 60 | llvm::Value * |
Patrick Beard | eb382ec | 2012-04-19 00:25:12 +0000 | [diff] [blame] | 61 | CodeGenFunction::EmitObjCBoxedExpr(const ObjCBoxedExpr *E) { |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 62 | // Generate the correct selector for this literal's concrete type. |
Patrick Beard | eb382ec | 2012-04-19 00:25:12 +0000 | [diff] [blame] | 63 | const Expr *SubExpr = E->getSubExpr(); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 64 | // Get the method. |
Patrick Beard | eb382ec | 2012-04-19 00:25:12 +0000 | [diff] [blame] | 65 | const ObjCMethodDecl *BoxingMethod = E->getBoxingMethod(); |
| 66 | assert(BoxingMethod && "BoxingMethod is null"); |
| 67 | assert(BoxingMethod->isClassMethod() && "BoxingMethod must be a class method"); |
| 68 | Selector Sel = BoxingMethod->getSelector(); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 69 | |
| 70 | // Generate a reference to the class pointer, which will be the receiver. |
Patrick Beard | eb382ec | 2012-04-19 00:25:12 +0000 | [diff] [blame] | 71 | // Assumes that the method was introduced in the class that should be |
| 72 | // messaged (avoids pulling it out of the result type). |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 73 | CGObjCRuntime &Runtime = CGM.getObjCRuntime(); |
Patrick Beard | eb382ec | 2012-04-19 00:25:12 +0000 | [diff] [blame] | 74 | const ObjCInterfaceDecl *ClassDecl = BoxingMethod->getClassInterface(); |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 75 | llvm::Value *Receiver = Runtime.GetClass(*this, ClassDecl); |
Patrick Beard | eb382ec | 2012-04-19 00:25:12 +0000 | [diff] [blame] | 76 | |
| 77 | const ParmVarDecl *argDecl = *BoxingMethod->param_begin(); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 78 | QualType ArgQT = argDecl->getType().getUnqualifiedType(); |
Patrick Beard | eb382ec | 2012-04-19 00:25:12 +0000 | [diff] [blame] | 79 | RValue RV = EmitAnyExpr(SubExpr); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 80 | CallArgList Args; |
| 81 | Args.add(RV, ArgQT); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 82 | |
| 83 | RValue result = Runtime.GenerateMessageSend( |
| 84 | *this, ReturnValueSlot(), BoxingMethod->getReturnType(), Sel, Receiver, |
| 85 | Args, ClassDecl, BoxingMethod); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 86 | return Builder.CreateBitCast(result.getScalarVal(), |
| 87 | ConvertType(E->getType())); |
| 88 | } |
| 89 | |
| 90 | llvm::Value *CodeGenFunction::EmitObjCCollectionLiteral(const Expr *E, |
| 91 | const ObjCMethodDecl *MethodWithObjects) { |
| 92 | ASTContext &Context = CGM.getContext(); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 93 | const ObjCDictionaryLiteral *DLE = nullptr; |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 94 | const ObjCArrayLiteral *ALE = dyn_cast<ObjCArrayLiteral>(E); |
| 95 | if (!ALE) |
| 96 | DLE = cast<ObjCDictionaryLiteral>(E); |
| 97 | |
| 98 | // Compute the type of the array we're initializing. |
| 99 | uint64_t NumElements = |
| 100 | ALE ? ALE->getNumElements() : DLE->getNumElements(); |
| 101 | llvm::APInt APNumElements(Context.getTypeSize(Context.getSizeType()), |
| 102 | NumElements); |
| 103 | QualType ElementType = Context.getObjCIdType().withConst(); |
| 104 | QualType ElementArrayType |
| 105 | = Context.getConstantArrayType(ElementType, APNumElements, |
| 106 | ArrayType::Normal, /*IndexTypeQuals=*/0); |
| 107 | |
| 108 | // Allocate the temporary array(s). |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 109 | llvm::Value *Objects = CreateMemTemp(ElementArrayType, "objects"); |
| 110 | llvm::Value *Keys = nullptr; |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 111 | if (DLE) |
| 112 | Keys = CreateMemTemp(ElementArrayType, "keys"); |
| 113 | |
John McCall | 527842f | 2013-04-04 00:20:38 +0000 | [diff] [blame] | 114 | // In ARC, we may need to do extra work to keep all the keys and |
| 115 | // values alive until after the call. |
| 116 | SmallVector<llvm::Value *, 16> NeededObjects; |
| 117 | bool TrackNeededObjects = |
| 118 | (getLangOpts().ObjCAutoRefCount && |
| 119 | CGM.getCodeGenOpts().OptimizationLevel != 0); |
| 120 | |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 121 | // Perform the actual initialialization of the array(s). |
| 122 | for (uint64_t i = 0; i < NumElements; i++) { |
| 123 | if (ALE) { |
John McCall | 527842f | 2013-04-04 00:20:38 +0000 | [diff] [blame] | 124 | // Emit the element and store it to the appropriate array slot. |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 125 | const Expr *Rhs = ALE->getElement(i); |
| 126 | LValue LV = LValue::MakeAddr(Builder.CreateStructGEP(Objects, i), |
| 127 | ElementType, |
| 128 | Context.getTypeAlignInChars(Rhs->getType()), |
| 129 | Context); |
John McCall | 527842f | 2013-04-04 00:20:38 +0000 | [diff] [blame] | 130 | |
| 131 | llvm::Value *value = EmitScalarExpr(Rhs); |
| 132 | EmitStoreThroughLValue(RValue::get(value), LV, true); |
| 133 | if (TrackNeededObjects) { |
| 134 | NeededObjects.push_back(value); |
| 135 | } |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 136 | } else { |
John McCall | 527842f | 2013-04-04 00:20:38 +0000 | [diff] [blame] | 137 | // Emit the key and store it to the appropriate array slot. |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 138 | const Expr *Key = DLE->getKeyValueElement(i).Key; |
| 139 | LValue KeyLV = LValue::MakeAddr(Builder.CreateStructGEP(Keys, i), |
| 140 | ElementType, |
| 141 | Context.getTypeAlignInChars(Key->getType()), |
| 142 | Context); |
John McCall | 527842f | 2013-04-04 00:20:38 +0000 | [diff] [blame] | 143 | llvm::Value *keyValue = EmitScalarExpr(Key); |
| 144 | EmitStoreThroughLValue(RValue::get(keyValue), KeyLV, /*isInit=*/true); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 145 | |
John McCall | 527842f | 2013-04-04 00:20:38 +0000 | [diff] [blame] | 146 | // Emit the value and store it to the appropriate array slot. |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 147 | const Expr *Value = DLE->getKeyValueElement(i).Value; |
| 148 | LValue ValueLV = LValue::MakeAddr(Builder.CreateStructGEP(Objects, i), |
| 149 | ElementType, |
| 150 | Context.getTypeAlignInChars(Value->getType()), |
| 151 | Context); |
John McCall | 527842f | 2013-04-04 00:20:38 +0000 | [diff] [blame] | 152 | llvm::Value *valueValue = EmitScalarExpr(Value); |
| 153 | EmitStoreThroughLValue(RValue::get(valueValue), ValueLV, /*isInit=*/true); |
| 154 | if (TrackNeededObjects) { |
| 155 | NeededObjects.push_back(keyValue); |
| 156 | NeededObjects.push_back(valueValue); |
| 157 | } |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 158 | } |
| 159 | } |
| 160 | |
| 161 | // Generate the argument list. |
| 162 | CallArgList Args; |
| 163 | ObjCMethodDecl::param_const_iterator PI = MethodWithObjects->param_begin(); |
| 164 | const ParmVarDecl *argDecl = *PI++; |
| 165 | QualType ArgQT = argDecl->getType().getUnqualifiedType(); |
| 166 | Args.add(RValue::get(Objects), ArgQT); |
| 167 | if (DLE) { |
| 168 | argDecl = *PI++; |
| 169 | ArgQT = argDecl->getType().getUnqualifiedType(); |
| 170 | Args.add(RValue::get(Keys), ArgQT); |
| 171 | } |
| 172 | argDecl = *PI; |
| 173 | ArgQT = argDecl->getType().getUnqualifiedType(); |
| 174 | llvm::Value *Count = |
| 175 | llvm::ConstantInt::get(CGM.getTypes().ConvertType(ArgQT), NumElements); |
| 176 | Args.add(RValue::get(Count), ArgQT); |
| 177 | |
| 178 | // Generate a reference to the class pointer, which will be the receiver. |
| 179 | Selector Sel = MethodWithObjects->getSelector(); |
| 180 | QualType ResultType = E->getType(); |
| 181 | const ObjCObjectPointerType *InterfacePointerType |
| 182 | = ResultType->getAsObjCInterfacePointerType(); |
| 183 | ObjCInterfaceDecl *Class |
| 184 | = InterfacePointerType->getObjectType()->getInterface(); |
| 185 | CGObjCRuntime &Runtime = CGM.getObjCRuntime(); |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 186 | llvm::Value *Receiver = Runtime.GetClass(*this, Class); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 187 | |
| 188 | // Generate the message send. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 189 | RValue result = Runtime.GenerateMessageSend( |
| 190 | *this, ReturnValueSlot(), MethodWithObjects->getReturnType(), Sel, |
| 191 | Receiver, Args, Class, MethodWithObjects); |
John McCall | 527842f | 2013-04-04 00:20:38 +0000 | [diff] [blame] | 192 | |
| 193 | // The above message send needs these objects, but in ARC they are |
| 194 | // passed in a buffer that is essentially __unsafe_unretained. |
| 195 | // Therefore we must prevent the optimizer from releasing them until |
| 196 | // after the call. |
| 197 | if (TrackNeededObjects) { |
| 198 | EmitARCIntrinsicUse(NeededObjects); |
| 199 | } |
| 200 | |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 201 | return Builder.CreateBitCast(result.getScalarVal(), |
| 202 | ConvertType(E->getType())); |
| 203 | } |
| 204 | |
| 205 | llvm::Value *CodeGenFunction::EmitObjCArrayLiteral(const ObjCArrayLiteral *E) { |
| 206 | return EmitObjCCollectionLiteral(E, E->getArrayWithObjectsMethod()); |
| 207 | } |
| 208 | |
| 209 | llvm::Value *CodeGenFunction::EmitObjCDictionaryLiteral( |
| 210 | const ObjCDictionaryLiteral *E) { |
| 211 | return EmitObjCCollectionLiteral(E, E->getDictWithObjectsMethod()); |
| 212 | } |
| 213 | |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 214 | /// Emit a selector. |
| 215 | llvm::Value *CodeGenFunction::EmitObjCSelectorExpr(const ObjCSelectorExpr *E) { |
| 216 | // Untyped selector. |
| 217 | // Note that this implementation allows for non-constant strings to be passed |
| 218 | // as arguments to @selector(). Currently, the only thing preventing this |
| 219 | // behaviour is the type checking in the front end. |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 220 | return CGM.getObjCRuntime().GetSelector(*this, E->getSelector()); |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 221 | } |
| 222 | |
Daniel Dunbar | ed7c618 | 2008-08-20 00:28:19 +0000 | [diff] [blame] | 223 | llvm::Value *CodeGenFunction::EmitObjCProtocolExpr(const ObjCProtocolExpr *E) { |
| 224 | // FIXME: This should pass the Decl not the name. |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 225 | return CGM.getObjCRuntime().GenerateProtocolRef(*this, E->getProtocol()); |
Daniel Dunbar | ed7c618 | 2008-08-20 00:28:19 +0000 | [diff] [blame] | 226 | } |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 227 | |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 228 | /// \brief Adjust the type of the result of an Objective-C message send |
| 229 | /// expression when the method has a related result type. |
| 230 | static RValue AdjustRelatedResultType(CodeGenFunction &CGF, |
Fariborz Jahanian | 490a52b | 2012-05-29 19:56:01 +0000 | [diff] [blame] | 231 | QualType ExpT, |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 232 | const ObjCMethodDecl *Method, |
| 233 | RValue Result) { |
| 234 | if (!Method) |
| 235 | return Result; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 236 | |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 237 | if (!Method->hasRelatedResultType() || |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 238 | CGF.getContext().hasSameType(ExpT, Method->getReturnType()) || |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 239 | !Result.isScalar()) |
| 240 | return Result; |
| 241 | |
| 242 | // We have applied a related result type. Cast the rvalue appropriately. |
| 243 | return RValue::get(CGF.Builder.CreateBitCast(Result.getScalarVal(), |
Fariborz Jahanian | 490a52b | 2012-05-29 19:56:01 +0000 | [diff] [blame] | 244 | CGF.ConvertType(ExpT))); |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 245 | } |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 246 | |
John McCall | dc7c5ad | 2011-07-22 08:53:00 +0000 | [diff] [blame] | 247 | /// Decide whether to extend the lifetime of the receiver of a |
| 248 | /// returns-inner-pointer message. |
| 249 | static bool |
| 250 | shouldExtendReceiverForInnerPointerMessage(const ObjCMessageExpr *message) { |
| 251 | switch (message->getReceiverKind()) { |
| 252 | |
| 253 | // For a normal instance message, we should extend unless the |
| 254 | // receiver is loaded from a variable with precise lifetime. |
| 255 | case ObjCMessageExpr::Instance: { |
| 256 | const Expr *receiver = message->getInstanceReceiver(); |
| 257 | const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(receiver); |
| 258 | if (!ice || ice->getCastKind() != CK_LValueToRValue) return true; |
| 259 | receiver = ice->getSubExpr()->IgnoreParens(); |
| 260 | |
| 261 | // Only __strong variables. |
| 262 | if (receiver->getType().getObjCLifetime() != Qualifiers::OCL_Strong) |
| 263 | return true; |
| 264 | |
| 265 | // All ivars and fields have precise lifetime. |
| 266 | if (isa<MemberExpr>(receiver) || isa<ObjCIvarRefExpr>(receiver)) |
| 267 | return false; |
| 268 | |
| 269 | // Otherwise, check for variables. |
| 270 | const DeclRefExpr *declRef = dyn_cast<DeclRefExpr>(ice->getSubExpr()); |
| 271 | if (!declRef) return true; |
| 272 | const VarDecl *var = dyn_cast<VarDecl>(declRef->getDecl()); |
| 273 | if (!var) return true; |
| 274 | |
| 275 | // All variables have precise lifetime except local variables with |
| 276 | // automatic storage duration that aren't specially marked. |
| 277 | return (var->hasLocalStorage() && |
| 278 | !var->hasAttr<ObjCPreciseLifetimeAttr>()); |
| 279 | } |
| 280 | |
| 281 | case ObjCMessageExpr::Class: |
| 282 | case ObjCMessageExpr::SuperClass: |
| 283 | // It's never necessary for class objects. |
| 284 | return false; |
| 285 | |
| 286 | case ObjCMessageExpr::SuperInstance: |
| 287 | // We generally assume that 'self' lives throughout a method call. |
| 288 | return false; |
| 289 | } |
| 290 | |
| 291 | llvm_unreachable("invalid receiver kind"); |
| 292 | } |
| 293 | |
John McCall | ef072fd | 2010-05-22 01:48:05 +0000 | [diff] [blame] | 294 | RValue CodeGenFunction::EmitObjCMessageExpr(const ObjCMessageExpr *E, |
| 295 | ReturnValueSlot Return) { |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 296 | // Only the lookup mechanism and first two arguments of the method |
| 297 | // implementation vary between runtimes. We can get the receiver and |
| 298 | // arguments in generic code. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 299 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 300 | bool isDelegateInit = E->isDelegateInitCall(); |
| 301 | |
John McCall | dc7c5ad | 2011-07-22 08:53:00 +0000 | [diff] [blame] | 302 | const ObjCMethodDecl *method = E->getMethodDecl(); |
Fariborz Jahanian | 4e1524b | 2012-01-29 20:27:13 +0000 | [diff] [blame] | 303 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 304 | // We don't retain the receiver in delegate init calls, and this is |
| 305 | // safe because the receiver value is always loaded from 'self', |
| 306 | // which we zero out. We don't want to Block_copy block receivers, |
| 307 | // though. |
| 308 | bool retainSelf = |
| 309 | (!isDelegateInit && |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 310 | CGM.getLangOpts().ObjCAutoRefCount && |
John McCall | dc7c5ad | 2011-07-22 08:53:00 +0000 | [diff] [blame] | 311 | method && |
| 312 | method->hasAttr<NSConsumesSelfAttr>()); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 313 | |
Daniel Dunbar | 208ff5e | 2008-08-11 18:12:00 +0000 | [diff] [blame] | 314 | CGObjCRuntime &Runtime = CGM.getObjCRuntime(); |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 315 | bool isSuperMessage = false; |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 316 | bool isClassMessage = false; |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 317 | ObjCInterfaceDecl *OID = nullptr; |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 318 | // Find the receiver |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 319 | QualType ReceiverType; |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 320 | llvm::Value *Receiver = nullptr; |
Douglas Gregor | 04badcf | 2010-04-21 00:45:42 +0000 | [diff] [blame] | 321 | switch (E->getReceiverKind()) { |
| 322 | case ObjCMessageExpr::Instance: |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 323 | ReceiverType = E->getInstanceReceiver()->getType(); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 324 | if (retainSelf) { |
| 325 | TryEmitResult ter = tryEmitARCRetainScalarExpr(*this, |
| 326 | E->getInstanceReceiver()); |
| 327 | Receiver = ter.getPointer(); |
John McCall | dc7c5ad | 2011-07-22 08:53:00 +0000 | [diff] [blame] | 328 | if (ter.getInt()) retainSelf = false; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 329 | } else |
| 330 | Receiver = EmitScalarExpr(E->getInstanceReceiver()); |
Douglas Gregor | 04badcf | 2010-04-21 00:45:42 +0000 | [diff] [blame] | 331 | break; |
Daniel Dunbar | ddb2a3d | 2008-08-16 00:25:02 +0000 | [diff] [blame] | 332 | |
Douglas Gregor | 04badcf | 2010-04-21 00:45:42 +0000 | [diff] [blame] | 333 | case ObjCMessageExpr::Class: { |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 334 | ReceiverType = E->getClassReceiver(); |
| 335 | const ObjCObjectType *ObjTy = ReceiverType->getAs<ObjCObjectType>(); |
John McCall | 3031c63 | 2010-05-17 20:12:43 +0000 | [diff] [blame] | 336 | assert(ObjTy && "Invalid Objective-C class message send"); |
| 337 | OID = ObjTy->getInterface(); |
| 338 | assert(OID && "Invalid Objective-C class message send"); |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 339 | Receiver = Runtime.GetClass(*this, OID); |
Daniel Dunbar | f56f191 | 2008-08-25 08:19:24 +0000 | [diff] [blame] | 340 | isClassMessage = true; |
Douglas Gregor | 04badcf | 2010-04-21 00:45:42 +0000 | [diff] [blame] | 341 | break; |
| 342 | } |
| 343 | |
| 344 | case ObjCMessageExpr::SuperInstance: |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 345 | ReceiverType = E->getSuperType(); |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 346 | Receiver = LoadObjCSelf(); |
Douglas Gregor | 04badcf | 2010-04-21 00:45:42 +0000 | [diff] [blame] | 347 | isSuperMessage = true; |
| 348 | break; |
| 349 | |
| 350 | case ObjCMessageExpr::SuperClass: |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 351 | ReceiverType = E->getSuperType(); |
Douglas Gregor | 04badcf | 2010-04-21 00:45:42 +0000 | [diff] [blame] | 352 | Receiver = LoadObjCSelf(); |
| 353 | isSuperMessage = true; |
| 354 | isClassMessage = true; |
| 355 | break; |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 356 | } |
| 357 | |
John McCall | dc7c5ad | 2011-07-22 08:53:00 +0000 | [diff] [blame] | 358 | if (retainSelf) |
| 359 | Receiver = EmitARCRetainNonBlock(Receiver); |
| 360 | |
| 361 | // In ARC, we sometimes want to "extend the lifetime" |
| 362 | // (i.e. retain+autorelease) of receivers of returns-inner-pointer |
| 363 | // messages. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 364 | if (getLangOpts().ObjCAutoRefCount && method && |
John McCall | dc7c5ad | 2011-07-22 08:53:00 +0000 | [diff] [blame] | 365 | method->hasAttr<ObjCReturnsInnerPointerAttr>() && |
| 366 | shouldExtendReceiverForInnerPointerMessage(E)) |
| 367 | Receiver = EmitARCRetainAutorelease(ReceiverType, Receiver); |
| 368 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 369 | QualType ResultType = method ? method->getReturnType() : E->getType(); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 370 | |
Daniel Dunbar | 19cd87e | 2008-08-30 03:02:31 +0000 | [diff] [blame] | 371 | CallArgList Args; |
John McCall | dc7c5ad | 2011-07-22 08:53:00 +0000 | [diff] [blame] | 372 | EmitCallArgs(Args, method, E->arg_begin(), E->arg_end()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 373 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 374 | // For delegate init calls in ARC, do an unsafe store of null into |
| 375 | // self. This represents the call taking direct ownership of that |
| 376 | // value. We have to do this after emitting the other call |
| 377 | // arguments because they might also reference self, but we don't |
| 378 | // have to worry about any of them modifying self because that would |
| 379 | // be an undefined read and write of an object in unordered |
| 380 | // expressions. |
| 381 | if (isDelegateInit) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 382 | assert(getLangOpts().ObjCAutoRefCount && |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 383 | "delegate init calls should only be marked in ARC"); |
| 384 | |
| 385 | // Do an unsafe store of null into self. |
| 386 | llvm::Value *selfAddr = |
| 387 | LocalDeclMap[cast<ObjCMethodDecl>(CurCodeDecl)->getSelfDecl()]; |
| 388 | assert(selfAddr && "no self entry for a delegate init call?"); |
| 389 | |
| 390 | Builder.CreateStore(getNullForVariable(selfAddr), selfAddr); |
| 391 | } |
Anders Carlsson | 7e70fb2 | 2010-06-21 20:59:55 +0000 | [diff] [blame] | 392 | |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 393 | RValue result; |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 394 | if (isSuperMessage) { |
Chris Lattner | 9384c76 | 2008-06-26 04:42:20 +0000 | [diff] [blame] | 395 | // super is only valid in an Objective-C method |
| 396 | const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); |
Fariborz Jahanian | 7ce7792 | 2009-02-28 20:07:56 +0000 | [diff] [blame] | 397 | bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext()); |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 398 | result = Runtime.GenerateMessageSendSuper(*this, Return, ResultType, |
| 399 | E->getSelector(), |
| 400 | OMD->getClassInterface(), |
| 401 | isCategoryImpl, |
| 402 | Receiver, |
| 403 | isClassMessage, |
| 404 | Args, |
John McCall | dc7c5ad | 2011-07-22 08:53:00 +0000 | [diff] [blame] | 405 | method); |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 406 | } else { |
| 407 | result = Runtime.GenerateMessageSend(*this, Return, ResultType, |
| 408 | E->getSelector(), |
| 409 | Receiver, Args, OID, |
John McCall | dc7c5ad | 2011-07-22 08:53:00 +0000 | [diff] [blame] | 410 | method); |
Chris Lattner | 8fdf328 | 2008-06-24 17:04:18 +0000 | [diff] [blame] | 411 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 412 | |
| 413 | // For delegate init calls in ARC, implicitly store the result of |
| 414 | // the call back into self. This takes ownership of the value. |
| 415 | if (isDelegateInit) { |
| 416 | llvm::Value *selfAddr = |
| 417 | LocalDeclMap[cast<ObjCMethodDecl>(CurCodeDecl)->getSelfDecl()]; |
| 418 | llvm::Value *newSelf = result.getScalarVal(); |
| 419 | |
| 420 | // The delegate return type isn't necessarily a matching type; in |
| 421 | // fact, it's quite likely to be 'id'. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 422 | llvm::Type *selfTy = |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 423 | cast<llvm::PointerType>(selfAddr->getType())->getElementType(); |
| 424 | newSelf = Builder.CreateBitCast(newSelf, selfTy); |
| 425 | |
| 426 | Builder.CreateStore(newSelf, selfAddr); |
| 427 | } |
Fariborz Jahanian | 4e1524b | 2012-01-29 20:27:13 +0000 | [diff] [blame] | 428 | |
Fariborz Jahanian | 490a52b | 2012-05-29 19:56:01 +0000 | [diff] [blame] | 429 | return AdjustRelatedResultType(*this, E->getType(), method, result); |
Anders Carlsson | 5508518 | 2007-08-21 17:43:55 +0000 | [diff] [blame] | 430 | } |
| 431 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 432 | namespace { |
| 433 | struct FinishARCDealloc : EHScopeStack::Cleanup { |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 434 | void Emit(CodeGenFunction &CGF, Flags flags) override { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 435 | const ObjCMethodDecl *method = cast<ObjCMethodDecl>(CGF.CurCodeDecl); |
John McCall | 799d34e | 2011-07-13 18:26:47 +0000 | [diff] [blame] | 436 | |
| 437 | const ObjCImplDecl *impl = cast<ObjCImplDecl>(method->getDeclContext()); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 438 | const ObjCInterfaceDecl *iface = impl->getClassInterface(); |
| 439 | if (!iface->getSuperClass()) return; |
| 440 | |
John McCall | 799d34e | 2011-07-13 18:26:47 +0000 | [diff] [blame] | 441 | bool isCategory = isa<ObjCCategoryImplDecl>(impl); |
| 442 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 443 | // Call [super dealloc] if we have a superclass. |
| 444 | llvm::Value *self = CGF.LoadObjCSelf(); |
| 445 | |
| 446 | CallArgList args; |
| 447 | CGF.CGM.getObjCRuntime().GenerateMessageSendSuper(CGF, ReturnValueSlot(), |
| 448 | CGF.getContext().VoidTy, |
| 449 | method->getSelector(), |
| 450 | iface, |
John McCall | 799d34e | 2011-07-13 18:26:47 +0000 | [diff] [blame] | 451 | isCategory, |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 452 | self, |
| 453 | /*is class msg*/ false, |
| 454 | args, |
| 455 | method); |
| 456 | } |
| 457 | }; |
| 458 | } |
| 459 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 460 | /// StartObjCMethod - Begin emission of an ObjCMethod. This generates |
| 461 | /// the LLVM function and sets the other context used by |
| 462 | /// CodeGenFunction. |
Fariborz Jahanian | 679a502 | 2009-01-10 21:06:09 +0000 | [diff] [blame] | 463 | void CodeGenFunction::StartObjCMethod(const ObjCMethodDecl *OMD, |
Devang Patel | 8d3f897 | 2011-05-19 23:37:41 +0000 | [diff] [blame] | 464 | const ObjCContainerDecl *CD, |
| 465 | SourceLocation StartLoc) { |
John McCall | d26bc76 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 466 | FunctionArgList args; |
Devang Patel | 4800ea6 | 2010-04-05 21:09:15 +0000 | [diff] [blame] | 467 | // Check if we should generate debug info for this method. |
David Blaikie | c3030bc | 2013-08-26 20:33:21 +0000 | [diff] [blame] | 468 | if (OMD->hasAttr<NoDebugAttr>()) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 469 | DebugInfo = nullptr; // disable debug info indefinitely for this function |
Devang Patel | 4800ea6 | 2010-04-05 21:09:15 +0000 | [diff] [blame] | 470 | |
Fariborz Jahanian | 679a502 | 2009-01-10 21:06:09 +0000 | [diff] [blame] | 471 | llvm::Function *Fn = CGM.getObjCRuntime().GenerateMethod(OMD, CD); |
Daniel Dunbar | f80519b | 2008-09-04 23:41:35 +0000 | [diff] [blame] | 472 | |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 473 | const CGFunctionInfo &FI = CGM.getTypes().arrangeObjCMethodDeclaration(OMD); |
Daniel Dunbar | 0e4f40e | 2009-04-17 00:48:04 +0000 | [diff] [blame] | 474 | CGM.SetInternalFunctionAttributes(OMD, Fn, FI); |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 475 | |
John McCall | d26bc76 | 2011-03-09 04:27:21 +0000 | [diff] [blame] | 476 | args.push_back(OMD->getSelfDecl()); |
| 477 | args.push_back(OMD->getCmdDecl()); |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 478 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 479 | for (const auto *PI : OMD->params()) |
| 480 | args.push_back(PI); |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 481 | |
Peter Collingbourne | 1411047 | 2011-01-13 18:57:25 +0000 | [diff] [blame] | 482 | CurGD = OMD; |
| 483 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 484 | StartFunction(OMD, OMD->getReturnType(), Fn, FI, args, |
| 485 | OMD->getLocation(), StartLoc); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 486 | |
| 487 | // In ARC, certain methods get an extra cleanup. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 488 | if (CGM.getLangOpts().ObjCAutoRefCount && |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 489 | OMD->isInstanceMethod() && |
| 490 | OMD->getSelector().isUnarySelector()) { |
| 491 | const IdentifierInfo *ident = |
| 492 | OMD->getSelector().getIdentifierInfoForSlot(0); |
| 493 | if (ident->isStr("dealloc")) |
| 494 | EHStack.pushCleanup<FinishARCDealloc>(getARCCleanupKind()); |
| 495 | } |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 496 | } |
Daniel Dunbar | b7ec246 | 2008-08-16 03:19:19 +0000 | [diff] [blame] | 497 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 498 | static llvm::Value *emitARCRetainLoadOfScalar(CodeGenFunction &CGF, |
| 499 | LValue lvalue, QualType type); |
| 500 | |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 501 | /// Generate an Objective-C method. An Objective-C method is a C function with |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 502 | /// its pointer, name, and types registered in the class struture. |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 503 | void CodeGenFunction::GenerateObjCMethod(const ObjCMethodDecl *OMD) { |
Devang Patel | 8d3f897 | 2011-05-19 23:37:41 +0000 | [diff] [blame] | 504 | StartObjCMethod(OMD, OMD->getClassInterface(), OMD->getLocStart()); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 505 | PGO.assignRegionCounters(OMD, CurFn); |
| 506 | assert(isa<CompoundStmt>(OMD->getBody())); |
| 507 | RegionCounter Cnt = getPGORegionCounter(OMD->getBody()); |
| 508 | Cnt.beginRegion(Builder); |
| 509 | EmitCompoundStmtWithoutScope(*cast<CompoundStmt>(OMD->getBody())); |
Argyrios Kyrtzidis | 6fb0aee | 2009-06-30 02:35:26 +0000 | [diff] [blame] | 510 | FinishFunction(OMD->getBodyRBrace()); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 511 | PGO.emitInstrumentationData(); |
| 512 | PGO.destroyRegionCounters(); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 513 | } |
| 514 | |
John McCall | 41bdde9 | 2011-09-12 23:06:44 +0000 | [diff] [blame] | 515 | /// emitStructGetterCall - Call the runtime function to load a property |
| 516 | /// into the return value slot. |
| 517 | static void emitStructGetterCall(CodeGenFunction &CGF, ObjCIvarDecl *ivar, |
| 518 | bool isAtomic, bool hasStrong) { |
| 519 | ASTContext &Context = CGF.getContext(); |
| 520 | |
| 521 | llvm::Value *src = |
| 522 | CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), CGF.LoadObjCSelf(), |
| 523 | ivar, 0).getAddress(); |
| 524 | |
| 525 | // objc_copyStruct (ReturnValue, &structIvar, |
| 526 | // sizeof (Type of Ivar), isAtomic, false); |
| 527 | CallArgList args; |
| 528 | |
| 529 | llvm::Value *dest = CGF.Builder.CreateBitCast(CGF.ReturnValue, CGF.VoidPtrTy); |
| 530 | args.add(RValue::get(dest), Context.VoidPtrTy); |
| 531 | |
| 532 | src = CGF.Builder.CreateBitCast(src, CGF.VoidPtrTy); |
| 533 | args.add(RValue::get(src), Context.VoidPtrTy); |
| 534 | |
| 535 | CharUnits size = CGF.getContext().getTypeSizeInChars(ivar->getType()); |
| 536 | args.add(RValue::get(CGF.CGM.getSize(size)), Context.getSizeType()); |
| 537 | args.add(RValue::get(CGF.Builder.getInt1(isAtomic)), Context.BoolTy); |
| 538 | args.add(RValue::get(CGF.Builder.getInt1(hasStrong)), Context.BoolTy); |
| 539 | |
| 540 | llvm::Value *fn = CGF.CGM.getObjCRuntime().GetGetStructFunction(); |
John McCall | 0f3d097 | 2012-07-07 06:41:13 +0000 | [diff] [blame] | 541 | CGF.EmitCall(CGF.getTypes().arrangeFreeFunctionCall(Context.VoidTy, args, |
| 542 | FunctionType::ExtInfo(), |
| 543 | RequiredArgs::All), |
John McCall | 41bdde9 | 2011-09-12 23:06:44 +0000 | [diff] [blame] | 544 | fn, ReturnValueSlot(), args); |
| 545 | } |
| 546 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 547 | /// Determine whether the given architecture supports unaligned atomic |
| 548 | /// accesses. They don't have to be fast, just faster than a function |
| 549 | /// call and a mutex. |
| 550 | static bool hasUnalignedAtomics(llvm::Triple::ArchType arch) { |
Eli Friedman | de24d44 | 2011-09-13 20:48:30 +0000 | [diff] [blame] | 551 | // FIXME: Allow unaligned atomic load/store on x86. (It is not |
| 552 | // currently supported by the backend.) |
| 553 | return 0; |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 554 | } |
| 555 | |
| 556 | /// Return the maximum size that permits atomic accesses for the given |
| 557 | /// architecture. |
| 558 | static CharUnits getMaxAtomicAccessSize(CodeGenModule &CGM, |
| 559 | llvm::Triple::ArchType arch) { |
| 560 | // ARM has 8-byte atomic accesses, but it's not clear whether we |
| 561 | // want to rely on them here. |
| 562 | |
| 563 | // In the default case, just assume that any size up to a pointer is |
| 564 | // fine given adequate alignment. |
| 565 | return CharUnits::fromQuantity(CGM.PointerSizeInBytes); |
| 566 | } |
| 567 | |
| 568 | namespace { |
| 569 | class PropertyImplStrategy { |
| 570 | public: |
| 571 | enum StrategyKind { |
| 572 | /// The 'native' strategy is to use the architecture's provided |
| 573 | /// reads and writes. |
| 574 | Native, |
| 575 | |
| 576 | /// Use objc_setProperty and objc_getProperty. |
| 577 | GetSetProperty, |
| 578 | |
| 579 | /// Use objc_setProperty for the setter, but use expression |
| 580 | /// evaluation for the getter. |
| 581 | SetPropertyAndExpressionGet, |
| 582 | |
| 583 | /// Use objc_copyStruct. |
| 584 | CopyStruct, |
| 585 | |
| 586 | /// The 'expression' strategy is to emit normal assignment or |
| 587 | /// lvalue-to-rvalue expressions. |
| 588 | Expression |
| 589 | }; |
| 590 | |
| 591 | StrategyKind getKind() const { return StrategyKind(Kind); } |
| 592 | |
| 593 | bool hasStrongMember() const { return HasStrong; } |
| 594 | bool isAtomic() const { return IsAtomic; } |
| 595 | bool isCopy() const { return IsCopy; } |
| 596 | |
| 597 | CharUnits getIvarSize() const { return IvarSize; } |
| 598 | CharUnits getIvarAlignment() const { return IvarAlignment; } |
| 599 | |
| 600 | PropertyImplStrategy(CodeGenModule &CGM, |
| 601 | const ObjCPropertyImplDecl *propImpl); |
| 602 | |
| 603 | private: |
| 604 | unsigned Kind : 8; |
| 605 | unsigned IsAtomic : 1; |
| 606 | unsigned IsCopy : 1; |
| 607 | unsigned HasStrong : 1; |
| 608 | |
| 609 | CharUnits IvarSize; |
| 610 | CharUnits IvarAlignment; |
| 611 | }; |
| 612 | } |
| 613 | |
Sylvestre Ledru | bed28ac | 2012-07-23 08:59:39 +0000 | [diff] [blame] | 614 | /// Pick an implementation strategy for the given property synthesis. |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 615 | PropertyImplStrategy::PropertyImplStrategy(CodeGenModule &CGM, |
| 616 | const ObjCPropertyImplDecl *propImpl) { |
| 617 | const ObjCPropertyDecl *prop = propImpl->getPropertyDecl(); |
John McCall | 265941b | 2011-09-13 18:31:23 +0000 | [diff] [blame] | 618 | ObjCPropertyDecl::SetterKind setterKind = prop->getSetterKind(); |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 619 | |
John McCall | 265941b | 2011-09-13 18:31:23 +0000 | [diff] [blame] | 620 | IsCopy = (setterKind == ObjCPropertyDecl::Copy); |
| 621 | IsAtomic = prop->isAtomic(); |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 622 | HasStrong = false; // doesn't matter here. |
| 623 | |
| 624 | // Evaluate the ivar's size and alignment. |
| 625 | ObjCIvarDecl *ivar = propImpl->getPropertyIvarDecl(); |
| 626 | QualType ivarType = ivar->getType(); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 627 | std::tie(IvarSize, IvarAlignment) = |
| 628 | CGM.getContext().getTypeInfoInChars(ivarType); |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 629 | |
| 630 | // If we have a copy property, we always have to use getProperty/setProperty. |
John McCall | 265941b | 2011-09-13 18:31:23 +0000 | [diff] [blame] | 631 | // TODO: we could actually use setProperty and an expression for non-atomics. |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 632 | if (IsCopy) { |
| 633 | Kind = GetSetProperty; |
| 634 | return; |
| 635 | } |
| 636 | |
John McCall | 265941b | 2011-09-13 18:31:23 +0000 | [diff] [blame] | 637 | // Handle retain. |
| 638 | if (setterKind == ObjCPropertyDecl::Retain) { |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 639 | // In GC-only, there's nothing special that needs to be done. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 640 | if (CGM.getLangOpts().getGC() == LangOptions::GCOnly) { |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 641 | // fallthrough |
| 642 | |
| 643 | // In ARC, if the property is non-atomic, use expression emission, |
| 644 | // which translates to objc_storeStrong. This isn't required, but |
| 645 | // it's slightly nicer. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 646 | } else if (CGM.getLangOpts().ObjCAutoRefCount && !IsAtomic) { |
John McCall | d64c2eb | 2012-08-20 23:36:59 +0000 | [diff] [blame] | 647 | // Using standard expression emission for the setter is only |
| 648 | // acceptable if the ivar is __strong, which won't be true if |
| 649 | // the property is annotated with __attribute__((NSObject)). |
| 650 | // TODO: falling all the way back to objc_setProperty here is |
| 651 | // just laziness, though; we could still use objc_storeStrong |
| 652 | // if we hacked it right. |
| 653 | if (ivarType.getObjCLifetime() == Qualifiers::OCL_Strong) |
| 654 | Kind = Expression; |
| 655 | else |
| 656 | Kind = SetPropertyAndExpressionGet; |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 657 | return; |
| 658 | |
| 659 | // Otherwise, we need to at least use setProperty. However, if |
| 660 | // the property isn't atomic, we can use normal expression |
| 661 | // emission for the getter. |
| 662 | } else if (!IsAtomic) { |
| 663 | Kind = SetPropertyAndExpressionGet; |
| 664 | return; |
| 665 | |
| 666 | // Otherwise, we have to use both setProperty and getProperty. |
| 667 | } else { |
| 668 | Kind = GetSetProperty; |
| 669 | return; |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | // If we're not atomic, just use expression accesses. |
| 674 | if (!IsAtomic) { |
| 675 | Kind = Expression; |
| 676 | return; |
| 677 | } |
| 678 | |
John McCall | 5889c60 | 2011-09-13 05:36:29 +0000 | [diff] [blame] | 679 | // Properties on bitfield ivars need to be emitted using expression |
| 680 | // accesses even if they're nominally atomic. |
| 681 | if (ivar->isBitField()) { |
| 682 | Kind = Expression; |
| 683 | return; |
| 684 | } |
| 685 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 686 | // GC-qualified or ARC-qualified ivars need to be emitted as |
| 687 | // expressions. This actually works out to being atomic anyway, |
| 688 | // except for ARC __strong, but that should trigger the above code. |
| 689 | if (ivarType.hasNonTrivialObjCLifetime() || |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 690 | (CGM.getLangOpts().getGC() && |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 691 | CGM.getContext().getObjCGCAttrKind(ivarType))) { |
| 692 | Kind = Expression; |
| 693 | return; |
| 694 | } |
| 695 | |
| 696 | // Compute whether the ivar has strong members. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 697 | if (CGM.getLangOpts().getGC()) |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 698 | if (const RecordType *recordType = ivarType->getAs<RecordType>()) |
| 699 | HasStrong = recordType->getDecl()->hasObjectMember(); |
| 700 | |
| 701 | // We can never access structs with object members with a native |
| 702 | // access, because we need to use write barriers. This is what |
| 703 | // objc_copyStruct is for. |
| 704 | if (HasStrong) { |
| 705 | Kind = CopyStruct; |
| 706 | return; |
| 707 | } |
| 708 | |
| 709 | // Otherwise, this is target-dependent and based on the size and |
| 710 | // alignment of the ivar. |
John McCall | c5d9a90 | 2011-09-13 07:33:34 +0000 | [diff] [blame] | 711 | |
| 712 | // If the size of the ivar is not a power of two, give up. We don't |
| 713 | // want to get into the business of doing compare-and-swaps. |
| 714 | if (!IvarSize.isPowerOfTwo()) { |
| 715 | Kind = CopyStruct; |
| 716 | return; |
| 717 | } |
| 718 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 719 | llvm::Triple::ArchType arch = |
John McCall | 64aa4b3 | 2013-04-16 22:48:15 +0000 | [diff] [blame] | 720 | CGM.getTarget().getTriple().getArch(); |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 721 | |
| 722 | // Most architectures require memory to fit within a single cache |
| 723 | // line, so the alignment has to be at least the size of the access. |
| 724 | // Otherwise we have to grab a lock. |
| 725 | if (IvarAlignment < IvarSize && !hasUnalignedAtomics(arch)) { |
| 726 | Kind = CopyStruct; |
| 727 | return; |
| 728 | } |
| 729 | |
| 730 | // If the ivar's size exceeds the architecture's maximum atomic |
| 731 | // access size, we have to use CopyStruct. |
| 732 | if (IvarSize > getMaxAtomicAccessSize(CGM, arch)) { |
| 733 | Kind = CopyStruct; |
| 734 | return; |
| 735 | } |
| 736 | |
| 737 | // Otherwise, we can use native loads and stores. |
| 738 | Kind = Native; |
| 739 | } |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 740 | |
James Dennett | 2ee5ba3 | 2012-06-15 22:10:14 +0000 | [diff] [blame] | 741 | /// \brief Generate an Objective-C property getter function. |
| 742 | /// |
| 743 | /// The given Decl must be an ObjCImplementationDecl. \@synthesize |
Steve Naroff | 489034c | 2009-01-10 22:55:25 +0000 | [diff] [blame] | 744 | /// is illegal within a category. |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 745 | void CodeGenFunction::GenerateObjCGetter(ObjCImplementationDecl *IMP, |
| 746 | const ObjCPropertyImplDecl *PID) { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 747 | llvm::Constant *AtomicHelperFn = |
| 748 | CodeGenFunction(CGM).GenerateObjCAtomicGetterCopyHelperFunction(PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 749 | const ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
| 750 | ObjCMethodDecl *OMD = PD->getGetterMethodDecl(); |
| 751 | assert(OMD && "Invalid call to generate getter (empty method)"); |
Eric Christopher | ea32047 | 2012-04-03 00:44:15 +0000 | [diff] [blame] | 752 | StartObjCMethod(OMD, IMP->getClassInterface(), OMD->getLocStart()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 753 | |
Fariborz Jahanian | 490a52b | 2012-05-29 19:56:01 +0000 | [diff] [blame] | 754 | generateObjCGetterBody(IMP, PID, OMD, AtomicHelperFn); |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 755 | |
| 756 | FinishFunction(); |
| 757 | } |
| 758 | |
John McCall | 6c11f0b | 2011-09-13 06:00:03 +0000 | [diff] [blame] | 759 | static bool hasTrivialGetExpr(const ObjCPropertyImplDecl *propImpl) { |
| 760 | const Expr *getter = propImpl->getGetterCXXConstructor(); |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 761 | if (!getter) return true; |
| 762 | |
| 763 | // Sema only makes only of these when the ivar has a C++ class type, |
| 764 | // so the form is pretty constrained. |
| 765 | |
John McCall | 6c11f0b | 2011-09-13 06:00:03 +0000 | [diff] [blame] | 766 | // If the property has a reference type, we might just be binding a |
| 767 | // reference, in which case the result will be a gl-value. We should |
| 768 | // treat this as a non-trivial operation. |
| 769 | if (getter->isGLValue()) |
| 770 | return false; |
| 771 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 772 | // If we selected a trivial copy-constructor, we're okay. |
| 773 | if (const CXXConstructExpr *construct = dyn_cast<CXXConstructExpr>(getter)) |
| 774 | return (construct->getConstructor()->isTrivial()); |
| 775 | |
| 776 | // The constructor might require cleanups (in which case it's never |
| 777 | // trivial). |
| 778 | assert(isa<ExprWithCleanups>(getter)); |
| 779 | return false; |
| 780 | } |
| 781 | |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 782 | /// emitCPPObjectAtomicGetterCall - Call the runtime function to |
| 783 | /// copy the ivar into the resturn slot. |
| 784 | static void emitCPPObjectAtomicGetterCall(CodeGenFunction &CGF, |
| 785 | llvm::Value *returnAddr, |
| 786 | ObjCIvarDecl *ivar, |
| 787 | llvm::Constant *AtomicHelperFn) { |
| 788 | // objc_copyCppObjectAtomic (&returnSlot, &CppObjectIvar, |
| 789 | // AtomicHelperFn); |
| 790 | CallArgList args; |
| 791 | |
| 792 | // The 1st argument is the return Slot. |
| 793 | args.add(RValue::get(returnAddr), CGF.getContext().VoidPtrTy); |
| 794 | |
| 795 | // The 2nd argument is the address of the ivar. |
| 796 | llvm::Value *ivarAddr = |
| 797 | CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), |
| 798 | CGF.LoadObjCSelf(), ivar, 0).getAddress(); |
| 799 | ivarAddr = CGF.Builder.CreateBitCast(ivarAddr, CGF.Int8PtrTy); |
| 800 | args.add(RValue::get(ivarAddr), CGF.getContext().VoidPtrTy); |
| 801 | |
| 802 | // Third argument is the helper function. |
| 803 | args.add(RValue::get(AtomicHelperFn), CGF.getContext().VoidPtrTy); |
| 804 | |
| 805 | llvm::Value *copyCppAtomicObjectFn = |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 806 | CGF.CGM.getObjCRuntime().GetCppAtomicObjectGetFunction(); |
John McCall | 0f3d097 | 2012-07-07 06:41:13 +0000 | [diff] [blame] | 807 | CGF.EmitCall(CGF.getTypes().arrangeFreeFunctionCall(CGF.getContext().VoidTy, |
| 808 | args, |
| 809 | FunctionType::ExtInfo(), |
| 810 | RequiredArgs::All), |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 811 | copyCppAtomicObjectFn, ReturnValueSlot(), args); |
| 812 | } |
| 813 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 814 | void |
| 815 | CodeGenFunction::generateObjCGetterBody(const ObjCImplementationDecl *classImpl, |
Fariborz Jahanian | b6e5fe3 | 2012-01-07 18:56:22 +0000 | [diff] [blame] | 816 | const ObjCPropertyImplDecl *propImpl, |
Fariborz Jahanian | 490a52b | 2012-05-29 19:56:01 +0000 | [diff] [blame] | 817 | const ObjCMethodDecl *GetterMethodDecl, |
Fariborz Jahanian | b6e5fe3 | 2012-01-07 18:56:22 +0000 | [diff] [blame] | 818 | llvm::Constant *AtomicHelperFn) { |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 819 | // If there's a non-trivial 'get' expression, we just have to emit that. |
| 820 | if (!hasTrivialGetExpr(propImpl)) { |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 821 | if (!AtomicHelperFn) { |
| 822 | ReturnStmt ret(SourceLocation(), propImpl->getGetterCXXConstructor(), |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 823 | /*nrvo*/ nullptr); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 824 | EmitReturnStmt(ret); |
| 825 | } |
| 826 | else { |
| 827 | ObjCIvarDecl *ivar = propImpl->getPropertyIvarDecl(); |
| 828 | emitCPPObjectAtomicGetterCall(*this, ReturnValue, |
| 829 | ivar, AtomicHelperFn); |
| 830 | } |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 831 | return; |
| 832 | } |
| 833 | |
| 834 | const ObjCPropertyDecl *prop = propImpl->getPropertyDecl(); |
| 835 | QualType propType = prop->getType(); |
| 836 | ObjCMethodDecl *getterMethod = prop->getGetterMethodDecl(); |
| 837 | |
| 838 | ObjCIvarDecl *ivar = propImpl->getPropertyIvarDecl(); |
| 839 | |
| 840 | // Pick an implementation strategy. |
| 841 | PropertyImplStrategy strategy(CGM, propImpl); |
| 842 | switch (strategy.getKind()) { |
| 843 | case PropertyImplStrategy::Native: { |
Eli Friedman | aa01466 | 2012-10-26 22:38:05 +0000 | [diff] [blame] | 844 | // We don't need to do anything for a zero-size struct. |
| 845 | if (strategy.getIvarSize().isZero()) |
| 846 | return; |
| 847 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 848 | LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), ivar, 0); |
| 849 | |
| 850 | // Currently, all atomic accesses have to be through integer |
| 851 | // types, so there's no point in trying to pick a prettier type. |
| 852 | llvm::Type *bitcastType = |
| 853 | llvm::Type::getIntNTy(getLLVMContext(), |
| 854 | getContext().toBits(strategy.getIvarSize())); |
| 855 | bitcastType = bitcastType->getPointerTo(); // addrspace 0 okay |
| 856 | |
| 857 | // Perform an atomic load. This does not impose ordering constraints. |
| 858 | llvm::Value *ivarAddr = LV.getAddress(); |
| 859 | ivarAddr = Builder.CreateBitCast(ivarAddr, bitcastType); |
| 860 | llvm::LoadInst *load = Builder.CreateLoad(ivarAddr, "load"); |
| 861 | load->setAlignment(strategy.getIvarAlignment().getQuantity()); |
| 862 | load->setAtomic(llvm::Unordered); |
| 863 | |
| 864 | // Store that value into the return address. Doing this with a |
| 865 | // bitcast is likely to produce some pretty ugly IR, but it's not |
| 866 | // the *most* terrible thing in the world. |
| 867 | Builder.CreateStore(load, Builder.CreateBitCast(ReturnValue, bitcastType)); |
| 868 | |
| 869 | // Make sure we don't do an autorelease. |
| 870 | AutoreleaseResult = false; |
| 871 | return; |
| 872 | } |
| 873 | |
| 874 | case PropertyImplStrategy::GetSetProperty: { |
| 875 | llvm::Value *getPropertyFn = |
| 876 | CGM.getObjCRuntime().GetPropertyGetFunction(); |
| 877 | if (!getPropertyFn) { |
| 878 | CGM.ErrorUnsupported(propImpl, "Obj-C getter requiring atomic copy"); |
Daniel Dunbar | c1cf4a5 | 2008-09-24 04:04:31 +0000 | [diff] [blame] | 879 | return; |
| 880 | } |
| 881 | |
| 882 | // Return (ivar-type) objc_getProperty((id) self, _cmd, offset, true). |
| 883 | // FIXME: Can't this be simpler? This might even be worse than the |
| 884 | // corresponding gcc code. |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 885 | llvm::Value *cmd = |
| 886 | Builder.CreateLoad(LocalDeclMap[getterMethod->getCmdDecl()], "cmd"); |
| 887 | llvm::Value *self = Builder.CreateBitCast(LoadObjCSelf(), VoidPtrTy); |
| 888 | llvm::Value *ivarOffset = |
| 889 | EmitIvarOffset(classImpl->getClassInterface(), ivar); |
| 890 | |
| 891 | CallArgList args; |
| 892 | args.add(RValue::get(self), getContext().getObjCIdType()); |
| 893 | args.add(RValue::get(cmd), getContext().getObjCSelType()); |
| 894 | args.add(RValue::get(ivarOffset), getContext().getPointerDiffType()); |
John McCall | 265941b | 2011-09-13 18:31:23 +0000 | [diff] [blame] | 895 | args.add(RValue::get(Builder.getInt1(strategy.isAtomic())), |
| 896 | getContext().BoolTy); |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 897 | |
Daniel Dunbar | e4be5a6 | 2009-02-03 23:43:59 +0000 | [diff] [blame] | 898 | // FIXME: We shouldn't need to get the function info here, the |
| 899 | // runtime already should have computed it to build the function. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 900 | llvm::Instruction *CallInstruction; |
John McCall | 0f3d097 | 2012-07-07 06:41:13 +0000 | [diff] [blame] | 901 | RValue RV = EmitCall(getTypes().arrangeFreeFunctionCall(propType, args, |
| 902 | FunctionType::ExtInfo(), |
| 903 | RequiredArgs::All), |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 904 | getPropertyFn, ReturnValueSlot(), args, nullptr, |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 905 | &CallInstruction); |
| 906 | if (llvm::CallInst *call = dyn_cast<llvm::CallInst>(CallInstruction)) |
| 907 | call->setTailCall(); |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 908 | |
Daniel Dunbar | c1cf4a5 | 2008-09-24 04:04:31 +0000 | [diff] [blame] | 909 | // We need to fix the type here. Ivars with copy & retain are |
| 910 | // always objects so we don't need to worry about complex or |
| 911 | // aggregates. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 912 | RV = RValue::get(Builder.CreateBitCast( |
| 913 | RV.getScalarVal(), |
| 914 | getTypes().ConvertType(getterMethod->getReturnType()))); |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 915 | |
| 916 | EmitReturnOfRValue(RV, propType); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 917 | |
| 918 | // objc_getProperty does an autorelease, so we should suppress ours. |
| 919 | AutoreleaseResult = false; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 920 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 921 | return; |
| 922 | } |
| 923 | |
| 924 | case PropertyImplStrategy::CopyStruct: |
| 925 | emitStructGetterCall(*this, ivar, strategy.isAtomic(), |
| 926 | strategy.hasStrongMember()); |
| 927 | return; |
| 928 | |
| 929 | case PropertyImplStrategy::Expression: |
| 930 | case PropertyImplStrategy::SetPropertyAndExpressionGet: { |
| 931 | LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), ivar, 0); |
| 932 | |
| 933 | QualType ivarType = ivar->getType(); |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 934 | switch (getEvaluationKind(ivarType)) { |
| 935 | case TEK_Complex: { |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 936 | ComplexPairTy pair = EmitLoadOfComplex(LV, SourceLocation()); |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 937 | EmitStoreOfComplex(pair, |
| 938 | MakeNaturalAlignAddrLValue(ReturnValue, ivarType), |
| 939 | /*init*/ true); |
| 940 | return; |
| 941 | } |
| 942 | case TEK_Aggregate: |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 943 | // The return value slot is guaranteed to not be aliased, but |
| 944 | // that's not necessarily the same as "on the stack", so |
| 945 | // we still potentially need objc_memmove_collectable. |
Chad Rosier | 649b4a1 | 2012-03-29 17:37:10 +0000 | [diff] [blame] | 946 | EmitAggregateCopy(ReturnValue, LV.getAddress(), ivarType); |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 947 | return; |
| 948 | case TEK_Scalar: { |
John McCall | ba3dd90 | 2011-07-22 05:23:13 +0000 | [diff] [blame] | 949 | llvm::Value *value; |
| 950 | if (propType->isReferenceType()) { |
| 951 | value = LV.getAddress(); |
| 952 | } else { |
| 953 | // We want to load and autoreleaseReturnValue ARC __weak ivars. |
| 954 | if (LV.getQuals().getObjCLifetime() == Qualifiers::OCL_Weak) { |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 955 | value = emitARCRetainLoadOfScalar(*this, LV, ivarType); |
John McCall | ba3dd90 | 2011-07-22 05:23:13 +0000 | [diff] [blame] | 956 | |
| 957 | // Otherwise we want to do a simple load, suppressing the |
| 958 | // final autorelease. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 959 | } else { |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 960 | value = EmitLoadOfLValue(LV, SourceLocation()).getScalarVal(); |
John McCall | ba3dd90 | 2011-07-22 05:23:13 +0000 | [diff] [blame] | 961 | AutoreleaseResult = false; |
Fariborz Jahanian | 1408676 | 2011-03-28 23:47:18 +0000 | [diff] [blame] | 962 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 963 | |
John McCall | ba3dd90 | 2011-07-22 05:23:13 +0000 | [diff] [blame] | 964 | value = Builder.CreateBitCast(value, ConvertType(propType)); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 965 | value = Builder.CreateBitCast( |
| 966 | value, ConvertType(GetterMethodDecl->getReturnType())); |
John McCall | ba3dd90 | 2011-07-22 05:23:13 +0000 | [diff] [blame] | 967 | } |
| 968 | |
| 969 | EmitReturnOfRValue(RValue::get(value), propType); |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 970 | return; |
Fariborz Jahanian | ed1d29d | 2009-03-03 18:49:40 +0000 | [diff] [blame] | 971 | } |
John McCall | 9d232c8 | 2013-03-07 21:37:08 +0000 | [diff] [blame] | 972 | } |
| 973 | llvm_unreachable("bad evaluation kind"); |
Daniel Dunbar | c1cf4a5 | 2008-09-24 04:04:31 +0000 | [diff] [blame] | 974 | } |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 975 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 976 | } |
| 977 | llvm_unreachable("bad @property implementation strategy!"); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 978 | } |
| 979 | |
John McCall | 41bdde9 | 2011-09-12 23:06:44 +0000 | [diff] [blame] | 980 | /// emitStructSetterCall - Call the runtime function to store the value |
| 981 | /// from the first formal parameter into the given ivar. |
| 982 | static void emitStructSetterCall(CodeGenFunction &CGF, ObjCMethodDecl *OMD, |
| 983 | ObjCIvarDecl *ivar) { |
Fariborz Jahanian | 2846b97 | 2011-02-18 19:15:13 +0000 | [diff] [blame] | 984 | // objc_copyStruct (&structIvar, &Arg, |
| 985 | // sizeof (struct something), true, false); |
John McCall | bbb253c | 2011-09-10 09:30:49 +0000 | [diff] [blame] | 986 | CallArgList args; |
| 987 | |
| 988 | // The first argument is the address of the ivar. |
John McCall | 41bdde9 | 2011-09-12 23:06:44 +0000 | [diff] [blame] | 989 | llvm::Value *ivarAddr = CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), |
| 990 | CGF.LoadObjCSelf(), ivar, 0) |
| 991 | .getAddress(); |
| 992 | ivarAddr = CGF.Builder.CreateBitCast(ivarAddr, CGF.Int8PtrTy); |
| 993 | args.add(RValue::get(ivarAddr), CGF.getContext().VoidPtrTy); |
John McCall | bbb253c | 2011-09-10 09:30:49 +0000 | [diff] [blame] | 994 | |
| 995 | // The second argument is the address of the parameter variable. |
John McCall | 41bdde9 | 2011-09-12 23:06:44 +0000 | [diff] [blame] | 996 | ParmVarDecl *argVar = *OMD->param_begin(); |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 997 | DeclRefExpr argRef(argVar, false, argVar->getType().getNonReferenceType(), |
Fariborz Jahanian | c3953aa | 2012-01-05 00:10:16 +0000 | [diff] [blame] | 998 | VK_LValue, SourceLocation()); |
John McCall | 41bdde9 | 2011-09-12 23:06:44 +0000 | [diff] [blame] | 999 | llvm::Value *argAddr = CGF.EmitLValue(&argRef).getAddress(); |
| 1000 | argAddr = CGF.Builder.CreateBitCast(argAddr, CGF.Int8PtrTy); |
| 1001 | args.add(RValue::get(argAddr), CGF.getContext().VoidPtrTy); |
John McCall | bbb253c | 2011-09-10 09:30:49 +0000 | [diff] [blame] | 1002 | |
| 1003 | // The third argument is the sizeof the type. |
| 1004 | llvm::Value *size = |
John McCall | 41bdde9 | 2011-09-12 23:06:44 +0000 | [diff] [blame] | 1005 | CGF.CGM.getSize(CGF.getContext().getTypeSizeInChars(ivar->getType())); |
| 1006 | args.add(RValue::get(size), CGF.getContext().getSizeType()); |
John McCall | bbb253c | 2011-09-10 09:30:49 +0000 | [diff] [blame] | 1007 | |
John McCall | 41bdde9 | 2011-09-12 23:06:44 +0000 | [diff] [blame] | 1008 | // The fourth argument is the 'isAtomic' flag. |
| 1009 | args.add(RValue::get(CGF.Builder.getTrue()), CGF.getContext().BoolTy); |
John McCall | bbb253c | 2011-09-10 09:30:49 +0000 | [diff] [blame] | 1010 | |
John McCall | 41bdde9 | 2011-09-12 23:06:44 +0000 | [diff] [blame] | 1011 | // The fifth argument is the 'hasStrong' flag. |
| 1012 | // FIXME: should this really always be false? |
| 1013 | args.add(RValue::get(CGF.Builder.getFalse()), CGF.getContext().BoolTy); |
| 1014 | |
| 1015 | llvm::Value *copyStructFn = CGF.CGM.getObjCRuntime().GetSetStructFunction(); |
John McCall | 0f3d097 | 2012-07-07 06:41:13 +0000 | [diff] [blame] | 1016 | CGF.EmitCall(CGF.getTypes().arrangeFreeFunctionCall(CGF.getContext().VoidTy, |
| 1017 | args, |
| 1018 | FunctionType::ExtInfo(), |
| 1019 | RequiredArgs::All), |
John McCall | 41bdde9 | 2011-09-12 23:06:44 +0000 | [diff] [blame] | 1020 | copyStructFn, ReturnValueSlot(), args); |
Fariborz Jahanian | 2846b97 | 2011-02-18 19:15:13 +0000 | [diff] [blame] | 1021 | } |
| 1022 | |
Fariborz Jahanian | cd93b96 | 2012-01-06 22:33:54 +0000 | [diff] [blame] | 1023 | /// emitCPPObjectAtomicSetterCall - Call the runtime function to store |
| 1024 | /// the value from the first formal parameter into the given ivar, using |
| 1025 | /// the Cpp API for atomic Cpp objects with non-trivial copy assignment. |
| 1026 | static void emitCPPObjectAtomicSetterCall(CodeGenFunction &CGF, |
| 1027 | ObjCMethodDecl *OMD, |
| 1028 | ObjCIvarDecl *ivar, |
| 1029 | llvm::Constant *AtomicHelperFn) { |
| 1030 | // objc_copyCppObjectAtomic (&CppObjectIvar, &Arg, |
| 1031 | // AtomicHelperFn); |
| 1032 | CallArgList args; |
| 1033 | |
| 1034 | // The first argument is the address of the ivar. |
| 1035 | llvm::Value *ivarAddr = |
| 1036 | CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), |
| 1037 | CGF.LoadObjCSelf(), ivar, 0).getAddress(); |
| 1038 | ivarAddr = CGF.Builder.CreateBitCast(ivarAddr, CGF.Int8PtrTy); |
| 1039 | args.add(RValue::get(ivarAddr), CGF.getContext().VoidPtrTy); |
| 1040 | |
| 1041 | // The second argument is the address of the parameter variable. |
| 1042 | ParmVarDecl *argVar = *OMD->param_begin(); |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 1043 | DeclRefExpr argRef(argVar, false, argVar->getType().getNonReferenceType(), |
Fariborz Jahanian | cd93b96 | 2012-01-06 22:33:54 +0000 | [diff] [blame] | 1044 | VK_LValue, SourceLocation()); |
| 1045 | llvm::Value *argAddr = CGF.EmitLValue(&argRef).getAddress(); |
| 1046 | argAddr = CGF.Builder.CreateBitCast(argAddr, CGF.Int8PtrTy); |
| 1047 | args.add(RValue::get(argAddr), CGF.getContext().VoidPtrTy); |
| 1048 | |
| 1049 | // Third argument is the helper function. |
| 1050 | args.add(RValue::get(AtomicHelperFn), CGF.getContext().VoidPtrTy); |
| 1051 | |
| 1052 | llvm::Value *copyCppAtomicObjectFn = |
David Chisnall | d397cfe | 2012-12-17 18:54:24 +0000 | [diff] [blame] | 1053 | CGF.CGM.getObjCRuntime().GetCppAtomicObjectSetFunction(); |
John McCall | 0f3d097 | 2012-07-07 06:41:13 +0000 | [diff] [blame] | 1054 | CGF.EmitCall(CGF.getTypes().arrangeFreeFunctionCall(CGF.getContext().VoidTy, |
| 1055 | args, |
| 1056 | FunctionType::ExtInfo(), |
| 1057 | RequiredArgs::All), |
Fariborz Jahanian | cd93b96 | 2012-01-06 22:33:54 +0000 | [diff] [blame] | 1058 | copyCppAtomicObjectFn, ReturnValueSlot(), args); |
Fariborz Jahanian | cd93b96 | 2012-01-06 22:33:54 +0000 | [diff] [blame] | 1059 | } |
| 1060 | |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 1061 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 1062 | static bool hasTrivialSetExpr(const ObjCPropertyImplDecl *PID) { |
| 1063 | Expr *setter = PID->getSetterCXXAssignment(); |
| 1064 | if (!setter) return true; |
| 1065 | |
| 1066 | // Sema only makes only of these when the ivar has a C++ class type, |
| 1067 | // so the form is pretty constrained. |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1068 | |
| 1069 | // An operator call is trivial if the function it calls is trivial. |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 1070 | // This also implies that there's nothing non-trivial going on with |
| 1071 | // the arguments, because operator= can only be trivial if it's a |
| 1072 | // synthesized assignment operator and therefore both parameters are |
| 1073 | // references. |
| 1074 | if (CallExpr *call = dyn_cast<CallExpr>(setter)) { |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1075 | if (const FunctionDecl *callee |
| 1076 | = dyn_cast_or_null<FunctionDecl>(call->getCalleeDecl())) |
| 1077 | if (callee->isTrivial()) |
| 1078 | return true; |
| 1079 | return false; |
Fariborz Jahanian | 01cb307 | 2011-04-06 16:05:26 +0000 | [diff] [blame] | 1080 | } |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1081 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 1082 | assert(isa<ExprWithCleanups>(setter)); |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1083 | return false; |
| 1084 | } |
| 1085 | |
Benjamin Kramer | 4e494cf | 2012-03-10 20:38:56 +0000 | [diff] [blame] | 1086 | static bool UseOptimizedSetter(CodeGenModule &CGM) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1087 | if (CGM.getLangOpts().getGC() != LangOptions::NonGC) |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 1088 | return false; |
Daniel Dunbar | 7a0c064 | 2012-10-15 22:23:53 +0000 | [diff] [blame] | 1089 | return CGM.getLangOpts().ObjCRuntime.hasOptimizedSetter(); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 1090 | } |
| 1091 | |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1092 | void |
| 1093 | CodeGenFunction::generateObjCSetterBody(const ObjCImplementationDecl *classImpl, |
Fariborz Jahanian | cd93b96 | 2012-01-06 22:33:54 +0000 | [diff] [blame] | 1094 | const ObjCPropertyImplDecl *propImpl, |
| 1095 | llvm::Constant *AtomicHelperFn) { |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1096 | const ObjCPropertyDecl *prop = propImpl->getPropertyDecl(); |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 1097 | ObjCIvarDecl *ivar = propImpl->getPropertyIvarDecl(); |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1098 | ObjCMethodDecl *setterMethod = prop->getSetterMethodDecl(); |
Fariborz Jahanian | cd93b96 | 2012-01-06 22:33:54 +0000 | [diff] [blame] | 1099 | |
| 1100 | // Just use the setter expression if Sema gave us one and it's |
| 1101 | // non-trivial. |
| 1102 | if (!hasTrivialSetExpr(propImpl)) { |
| 1103 | if (!AtomicHelperFn) |
| 1104 | // If non-atomic, assignment is called directly. |
| 1105 | EmitStmt(propImpl->getSetterCXXAssignment()); |
| 1106 | else |
| 1107 | // If atomic, assignment is called via a locking api. |
| 1108 | emitCPPObjectAtomicSetterCall(*this, setterMethod, ivar, |
| 1109 | AtomicHelperFn); |
| 1110 | return; |
| 1111 | } |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1112 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 1113 | PropertyImplStrategy strategy(CGM, propImpl); |
| 1114 | switch (strategy.getKind()) { |
| 1115 | case PropertyImplStrategy::Native: { |
Eli Friedman | aa01466 | 2012-10-26 22:38:05 +0000 | [diff] [blame] | 1116 | // We don't need to do anything for a zero-size struct. |
| 1117 | if (strategy.getIvarSize().isZero()) |
| 1118 | return; |
| 1119 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 1120 | llvm::Value *argAddr = LocalDeclMap[*setterMethod->param_begin()]; |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1121 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 1122 | LValue ivarLValue = |
| 1123 | EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), ivar, /*quals*/ 0); |
| 1124 | llvm::Value *ivarAddr = ivarLValue.getAddress(); |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1125 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 1126 | // Currently, all atomic accesses have to be through integer |
| 1127 | // types, so there's no point in trying to pick a prettier type. |
| 1128 | llvm::Type *bitcastType = |
| 1129 | llvm::Type::getIntNTy(getLLVMContext(), |
| 1130 | getContext().toBits(strategy.getIvarSize())); |
| 1131 | bitcastType = bitcastType->getPointerTo(); // addrspace 0 okay |
| 1132 | |
| 1133 | // Cast both arguments to the chosen operation type. |
| 1134 | argAddr = Builder.CreateBitCast(argAddr, bitcastType); |
| 1135 | ivarAddr = Builder.CreateBitCast(ivarAddr, bitcastType); |
| 1136 | |
| 1137 | // This bitcast load is likely to cause some nasty IR. |
| 1138 | llvm::Value *load = Builder.CreateLoad(argAddr); |
| 1139 | |
| 1140 | // Perform an atomic store. There are no memory ordering requirements. |
| 1141 | llvm::StoreInst *store = Builder.CreateStore(load, ivarAddr); |
| 1142 | store->setAlignment(strategy.getIvarAlignment().getQuantity()); |
| 1143 | store->setAtomic(llvm::Unordered); |
| 1144 | return; |
| 1145 | } |
| 1146 | |
| 1147 | case PropertyImplStrategy::GetSetProperty: |
| 1148 | case PropertyImplStrategy::SetPropertyAndExpressionGet: { |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1149 | |
| 1150 | llvm::Value *setOptimizedPropertyFn = nullptr; |
| 1151 | llvm::Value *setPropertyFn = nullptr; |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 1152 | if (UseOptimizedSetter(CGM)) { |
Daniel Dunbar | 7a0c064 | 2012-10-15 22:23:53 +0000 | [diff] [blame] | 1153 | // 10.8 and iOS 6.0 code and GC is off |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 1154 | setOptimizedPropertyFn = |
Eric Christopher | 16098f3 | 2012-03-29 17:31:31 +0000 | [diff] [blame] | 1155 | CGM.getObjCRuntime() |
| 1156 | .GetOptimizedPropertySetFunction(strategy.isAtomic(), |
| 1157 | strategy.isCopy()); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 1158 | if (!setOptimizedPropertyFn) { |
| 1159 | CGM.ErrorUnsupported(propImpl, "Obj-C optimized setter - NYI"); |
| 1160 | return; |
| 1161 | } |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1162 | } |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 1163 | else { |
| 1164 | setPropertyFn = CGM.getObjCRuntime().GetPropertySetFunction(); |
| 1165 | if (!setPropertyFn) { |
| 1166 | CGM.ErrorUnsupported(propImpl, "Obj-C setter requiring atomic copy"); |
| 1167 | return; |
| 1168 | } |
| 1169 | } |
| 1170 | |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1171 | // Emit objc_setProperty((id) self, _cmd, offset, arg, |
| 1172 | // <is-atomic>, <is-copy>). |
| 1173 | llvm::Value *cmd = |
| 1174 | Builder.CreateLoad(LocalDeclMap[setterMethod->getCmdDecl()]); |
| 1175 | llvm::Value *self = |
| 1176 | Builder.CreateBitCast(LoadObjCSelf(), VoidPtrTy); |
| 1177 | llvm::Value *ivarOffset = |
| 1178 | EmitIvarOffset(classImpl->getClassInterface(), ivar); |
| 1179 | llvm::Value *arg = LocalDeclMap[*setterMethod->param_begin()]; |
| 1180 | arg = Builder.CreateBitCast(Builder.CreateLoad(arg, "arg"), VoidPtrTy); |
| 1181 | |
| 1182 | CallArgList args; |
| 1183 | args.add(RValue::get(self), getContext().getObjCIdType()); |
| 1184 | args.add(RValue::get(cmd), getContext().getObjCSelType()); |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 1185 | if (setOptimizedPropertyFn) { |
| 1186 | args.add(RValue::get(arg), getContext().getObjCIdType()); |
| 1187 | args.add(RValue::get(ivarOffset), getContext().getPointerDiffType()); |
John McCall | 0f3d097 | 2012-07-07 06:41:13 +0000 | [diff] [blame] | 1188 | EmitCall(getTypes().arrangeFreeFunctionCall(getContext().VoidTy, args, |
| 1189 | FunctionType::ExtInfo(), |
| 1190 | RequiredArgs::All), |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 1191 | setOptimizedPropertyFn, ReturnValueSlot(), args); |
| 1192 | } else { |
| 1193 | args.add(RValue::get(ivarOffset), getContext().getPointerDiffType()); |
| 1194 | args.add(RValue::get(arg), getContext().getObjCIdType()); |
| 1195 | args.add(RValue::get(Builder.getInt1(strategy.isAtomic())), |
| 1196 | getContext().BoolTy); |
| 1197 | args.add(RValue::get(Builder.getInt1(strategy.isCopy())), |
| 1198 | getContext().BoolTy); |
| 1199 | // FIXME: We shouldn't need to get the function info here, the runtime |
| 1200 | // already should have computed it to build the function. |
John McCall | 0f3d097 | 2012-07-07 06:41:13 +0000 | [diff] [blame] | 1201 | EmitCall(getTypes().arrangeFreeFunctionCall(getContext().VoidTy, args, |
| 1202 | FunctionType::ExtInfo(), |
| 1203 | RequiredArgs::All), |
Ted Kremenek | ebcb57a | 2012-03-06 20:05:56 +0000 | [diff] [blame] | 1204 | setPropertyFn, ReturnValueSlot(), args); |
| 1205 | } |
| 1206 | |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1207 | return; |
| 1208 | } |
| 1209 | |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 1210 | case PropertyImplStrategy::CopyStruct: |
John McCall | 41bdde9 | 2011-09-12 23:06:44 +0000 | [diff] [blame] | 1211 | emitStructSetterCall(*this, setterMethod, ivar); |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1212 | return; |
John McCall | 1e1f487 | 2011-09-13 03:34:09 +0000 | [diff] [blame] | 1213 | |
| 1214 | case PropertyImplStrategy::Expression: |
| 1215 | break; |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1216 | } |
| 1217 | |
| 1218 | // Otherwise, fake up some ASTs and emit a normal assignment. |
| 1219 | ValueDecl *selfDecl = setterMethod->getSelfDecl(); |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 1220 | DeclRefExpr self(selfDecl, false, selfDecl->getType(), |
| 1221 | VK_LValue, SourceLocation()); |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1222 | ImplicitCastExpr selfLoad(ImplicitCastExpr::OnStack, |
| 1223 | selfDecl->getType(), CK_LValueToRValue, &self, |
| 1224 | VK_RValue); |
| 1225 | ObjCIvarRefExpr ivarRef(ivar, ivar->getType().getNonReferenceType(), |
Fariborz Jahanian | 0c70181 | 2013-04-02 18:57:54 +0000 | [diff] [blame] | 1226 | SourceLocation(), SourceLocation(), |
| 1227 | &selfLoad, true, true); |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1228 | |
| 1229 | ParmVarDecl *argDecl = *setterMethod->param_begin(); |
| 1230 | QualType argType = argDecl->getType().getNonReferenceType(); |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 1231 | DeclRefExpr arg(argDecl, false, argType, VK_LValue, SourceLocation()); |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1232 | ImplicitCastExpr argLoad(ImplicitCastExpr::OnStack, |
| 1233 | argType.getUnqualifiedType(), CK_LValueToRValue, |
| 1234 | &arg, VK_RValue); |
| 1235 | |
| 1236 | // The property type can differ from the ivar type in some situations with |
| 1237 | // Objective-C pointer types, we can always bit cast the RHS in these cases. |
| 1238 | // The following absurdity is just to ensure well-formed IR. |
| 1239 | CastKind argCK = CK_NoOp; |
| 1240 | if (ivarRef.getType()->isObjCObjectPointerType()) { |
| 1241 | if (argLoad.getType()->isObjCObjectPointerType()) |
| 1242 | argCK = CK_BitCast; |
| 1243 | else if (argLoad.getType()->isBlockPointerType()) |
| 1244 | argCK = CK_BlockPointerToObjCPointerCast; |
| 1245 | else |
| 1246 | argCK = CK_CPointerToObjCPointerCast; |
| 1247 | } else if (ivarRef.getType()->isBlockPointerType()) { |
| 1248 | if (argLoad.getType()->isBlockPointerType()) |
| 1249 | argCK = CK_BitCast; |
| 1250 | else |
| 1251 | argCK = CK_AnyPointerToBlockPointerCast; |
| 1252 | } else if (ivarRef.getType()->isPointerType()) { |
| 1253 | argCK = CK_BitCast; |
| 1254 | } |
| 1255 | ImplicitCastExpr argCast(ImplicitCastExpr::OnStack, |
| 1256 | ivarRef.getType(), argCK, &argLoad, |
| 1257 | VK_RValue); |
| 1258 | Expr *finalArg = &argLoad; |
| 1259 | if (!getContext().hasSameUnqualifiedType(ivarRef.getType(), |
| 1260 | argLoad.getType())) |
| 1261 | finalArg = &argCast; |
| 1262 | |
| 1263 | |
| 1264 | BinaryOperator assign(&ivarRef, finalArg, BO_Assign, |
| 1265 | ivarRef.getType(), VK_RValue, OK_Ordinary, |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 1266 | SourceLocation(), false); |
John McCall | 71c758d | 2011-09-10 09:17:20 +0000 | [diff] [blame] | 1267 | EmitStmt(&assign); |
Fariborz Jahanian | 01cb307 | 2011-04-06 16:05:26 +0000 | [diff] [blame] | 1268 | } |
| 1269 | |
James Dennett | 2ee5ba3 | 2012-06-15 22:10:14 +0000 | [diff] [blame] | 1270 | /// \brief Generate an Objective-C property setter function. |
| 1271 | /// |
| 1272 | /// The given Decl must be an ObjCImplementationDecl. \@synthesize |
Steve Naroff | 489034c | 2009-01-10 22:55:25 +0000 | [diff] [blame] | 1273 | /// is illegal within a category. |
Fariborz Jahanian | fef30b5 | 2008-12-09 20:23:04 +0000 | [diff] [blame] | 1274 | void CodeGenFunction::GenerateObjCSetter(ObjCImplementationDecl *IMP, |
| 1275 | const ObjCPropertyImplDecl *PID) { |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1276 | llvm::Constant *AtomicHelperFn = |
| 1277 | CodeGenFunction(CGM).GenerateObjCAtomicSetterCopyHelperFunction(PID); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1278 | const ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
| 1279 | ObjCMethodDecl *OMD = PD->getSetterMethodDecl(); |
| 1280 | assert(OMD && "Invalid call to generate setter (empty method)"); |
Eric Christopher | ea32047 | 2012-04-03 00:44:15 +0000 | [diff] [blame] | 1281 | StartObjCMethod(OMD, IMP->getClassInterface(), OMD->getLocStart()); |
Daniel Dunbar | 86957eb | 2008-09-24 06:32:09 +0000 | [diff] [blame] | 1282 | |
Fariborz Jahanian | cd93b96 | 2012-01-06 22:33:54 +0000 | [diff] [blame] | 1283 | generateObjCSetterBody(IMP, PID, AtomicHelperFn); |
Daniel Dunbar | af05bb9 | 2008-08-26 08:29:31 +0000 | [diff] [blame] | 1284 | |
| 1285 | FinishFunction(); |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 1286 | } |
| 1287 | |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1288 | namespace { |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 1289 | struct DestroyIvar : EHScopeStack::Cleanup { |
| 1290 | private: |
| 1291 | llvm::Value *addr; |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1292 | const ObjCIvarDecl *ivar; |
Peter Collingbourne | 516bbd4 | 2012-01-26 03:33:36 +0000 | [diff] [blame] | 1293 | CodeGenFunction::Destroyer *destroyer; |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 1294 | bool useEHCleanupForArray; |
| 1295 | public: |
| 1296 | DestroyIvar(llvm::Value *addr, const ObjCIvarDecl *ivar, |
| 1297 | CodeGenFunction::Destroyer *destroyer, |
| 1298 | bool useEHCleanupForArray) |
Peter Collingbourne | 516bbd4 | 2012-01-26 03:33:36 +0000 | [diff] [blame] | 1299 | : addr(addr), ivar(ivar), destroyer(destroyer), |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 1300 | useEHCleanupForArray(useEHCleanupForArray) {} |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1301 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1302 | void Emit(CodeGenFunction &CGF, Flags flags) override { |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 1303 | LValue lvalue |
| 1304 | = CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), addr, ivar, /*CVR*/ 0); |
| 1305 | CGF.emitDestroy(lvalue.getAddress(), ivar->getType(), destroyer, |
John McCall | ad346f4 | 2011-07-12 20:27:29 +0000 | [diff] [blame] | 1306 | flags.isForNormalCleanup() && useEHCleanupForArray); |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1307 | } |
| 1308 | }; |
| 1309 | } |
| 1310 | |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 1311 | /// Like CodeGenFunction::destroyARCStrong, but do it with a call. |
| 1312 | static void destroyARCStrongWithStore(CodeGenFunction &CGF, |
| 1313 | llvm::Value *addr, |
| 1314 | QualType type) { |
| 1315 | llvm::Value *null = getNullForVariable(addr); |
| 1316 | CGF.EmitARCStoreStrongCall(addr, null, /*ignored*/ true); |
| 1317 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1318 | |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1319 | static void emitCXXDestructMethod(CodeGenFunction &CGF, |
| 1320 | ObjCImplementationDecl *impl) { |
| 1321 | CodeGenFunction::RunCleanupsScope scope(CGF); |
| 1322 | |
| 1323 | llvm::Value *self = CGF.LoadObjCSelf(); |
| 1324 | |
Jordy Rose | db8264e | 2011-07-22 02:08:32 +0000 | [diff] [blame] | 1325 | const ObjCInterfaceDecl *iface = impl->getClassInterface(); |
| 1326 | for (const ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1327 | ivar; ivar = ivar->getNextIvar()) { |
| 1328 | QualType type = ivar->getType(); |
| 1329 | |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1330 | // Check whether the ivar is a destructible type. |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 1331 | QualType::DestructionKind dtorKind = type.isDestructedType(); |
| 1332 | if (!dtorKind) continue; |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1333 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1334 | CodeGenFunction::Destroyer *destroyer = nullptr; |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1335 | |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 1336 | // Use a call to objc_storeStrong to destroy strong ivars, for the |
| 1337 | // general benefit of the tools. |
| 1338 | if (dtorKind == QualType::DK_objc_strong_lifetime) { |
Peter Collingbourne | 516bbd4 | 2012-01-26 03:33:36 +0000 | [diff] [blame] | 1339 | destroyer = destroyARCStrongWithStore; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1340 | |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 1341 | // Otherwise use the default for the destruction kind. |
| 1342 | } else { |
Peter Collingbourne | 516bbd4 | 2012-01-26 03:33:36 +0000 | [diff] [blame] | 1343 | destroyer = CGF.getDestroyer(dtorKind); |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1344 | } |
John McCall | 9928c48 | 2011-07-12 16:41:08 +0000 | [diff] [blame] | 1345 | |
| 1346 | CleanupKind cleanupKind = CGF.getCleanupKind(dtorKind); |
| 1347 | |
| 1348 | CGF.EHStack.pushCleanup<DestroyIvar>(cleanupKind, self, ivar, destroyer, |
| 1349 | cleanupKind & EHCleanup); |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1350 | } |
| 1351 | |
| 1352 | assert(scope.requiresCleanups() && "nothing to do in .cxx_destruct?"); |
| 1353 | } |
| 1354 | |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 1355 | void CodeGenFunction::GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP, |
| 1356 | ObjCMethodDecl *MD, |
| 1357 | bool ctor) { |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 1358 | MD->createImplicitParams(CGM.getContext(), IMP->getClassInterface()); |
Devang Patel | 8d3f897 | 2011-05-19 23:37:41 +0000 | [diff] [blame] | 1359 | StartObjCMethod(MD, IMP->getClassInterface(), MD->getLocStart()); |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1360 | |
| 1361 | // Emit .cxx_construct. |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 1362 | if (ctor) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1363 | // Suppress the final autorelease in ARC. |
| 1364 | AutoreleaseResult = false; |
| 1365 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1366 | for (const auto *IvarInit : IMP->inits()) { |
Francois Pichet | 00eb3f9 | 2010-12-04 09:14:42 +0000 | [diff] [blame] | 1367 | FieldDecl *Field = IvarInit->getAnyMember(); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1368 | ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(Field); |
Fariborz Jahanian | 9b4d4fc | 2010-04-28 22:30:33 +0000 | [diff] [blame] | 1369 | LValue LV = EmitLValueForIvar(TypeOfSelfObject(), |
| 1370 | LoadObjCSelf(), Ivar, 0); |
John McCall | 7c2349b | 2011-08-25 20:40:09 +0000 | [diff] [blame] | 1371 | EmitAggExpr(IvarInit->getInit(), |
| 1372 | AggValueSlot::forLValue(LV, AggValueSlot::IsDestructed, |
John McCall | 410ffb2 | 2011-08-25 23:04:34 +0000 | [diff] [blame] | 1373 | AggValueSlot::DoesNotNeedGCBarriers, |
Chad Rosier | 649b4a1 | 2012-03-29 17:37:10 +0000 | [diff] [blame] | 1374 | AggValueSlot::IsNotAliased)); |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 1375 | } |
| 1376 | // constructor returns 'self'. |
| 1377 | CodeGenTypes &Types = CGM.getTypes(); |
| 1378 | QualType IdTy(CGM.getContext().getObjCIdType()); |
| 1379 | llvm::Value *SelfAsId = |
| 1380 | Builder.CreateBitCast(LoadObjCSelf(), Types.ConvertType(IdTy)); |
| 1381 | EmitReturnOfRValue(RValue::get(SelfAsId), IdTy); |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1382 | |
| 1383 | // Emit .cxx_destruct. |
Chandler Carruth | bc397cf | 2010-05-06 00:20:39 +0000 | [diff] [blame] | 1384 | } else { |
John McCall | e81ac69 | 2011-03-22 07:05:39 +0000 | [diff] [blame] | 1385 | emitCXXDestructMethod(*this, IMP); |
Fariborz Jahanian | 109dfc6 | 2010-04-28 21:28:56 +0000 | [diff] [blame] | 1386 | } |
| 1387 | FinishFunction(); |
| 1388 | } |
| 1389 | |
Fariborz Jahanian | 0b2bd47 | 2010-04-13 00:38:05 +0000 | [diff] [blame] | 1390 | bool CodeGenFunction::IndirectObjCSetterArg(const CGFunctionInfo &FI) { |
| 1391 | CGFunctionInfo::const_arg_iterator it = FI.arg_begin(); |
| 1392 | it++; it++; |
| 1393 | const ABIArgInfo &AI = it->info; |
| 1394 | // FIXME. Is this sufficient check? |
| 1395 | return (AI.getKind() == ABIArgInfo::Indirect); |
| 1396 | } |
| 1397 | |
Fariborz Jahanian | 15bd588 | 2010-04-13 18:32:24 +0000 | [diff] [blame] | 1398 | bool CodeGenFunction::IvarTypeWithAggrGCObjects(QualType Ty) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1399 | if (CGM.getLangOpts().getGC() == LangOptions::NonGC) |
Fariborz Jahanian | 15bd588 | 2010-04-13 18:32:24 +0000 | [diff] [blame] | 1400 | return false; |
| 1401 | if (const RecordType *FDTTy = Ty.getTypePtr()->getAs<RecordType>()) |
| 1402 | return FDTTy->getDecl()->hasObjectMember(); |
| 1403 | return false; |
| 1404 | } |
| 1405 | |
Daniel Dunbar | c1cf4a5 | 2008-09-24 04:04:31 +0000 | [diff] [blame] | 1406 | llvm::Value *CodeGenFunction::LoadObjCSelf() { |
John McCall | f5ebf9b | 2013-05-03 07:33:41 +0000 | [diff] [blame] | 1407 | VarDecl *Self = cast<ObjCMethodDecl>(CurFuncDecl)->getSelfDecl(); |
| 1408 | DeclRefExpr DRE(Self, /*is enclosing local*/ (CurFuncDecl != CurCodeDecl), |
| 1409 | Self->getType(), VK_LValue, SourceLocation()); |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 1410 | return EmitLoadOfScalar(EmitDeclRefLValue(&DRE), SourceLocation()); |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 1411 | } |
| 1412 | |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 1413 | QualType CodeGenFunction::TypeOfSelfObject() { |
| 1414 | const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); |
| 1415 | ImplicitParamDecl *selfDecl = OMD->getSelfDecl(); |
Steve Naroff | 14108da | 2009-07-10 23:34:53 +0000 | [diff] [blame] | 1416 | const ObjCObjectPointerType *PTy = cast<ObjCObjectPointerType>( |
| 1417 | getContext().getCanonicalType(selfDecl->getType())); |
Fariborz Jahanian | 45012a7 | 2009-02-03 00:09:52 +0000 | [diff] [blame] | 1418 | return PTy->getPointeeType(); |
| 1419 | } |
| 1420 | |
Chris Lattner | 74391b4 | 2009-03-22 21:03:39 +0000 | [diff] [blame] | 1421 | void CodeGenFunction::EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S){ |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1422 | llvm::Constant *EnumerationMutationFn = |
Daniel Dunbar | c1cf4a5 | 2008-09-24 04:04:31 +0000 | [diff] [blame] | 1423 | CGM.getObjCRuntime().EnumerationMutationFunction(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1424 | |
Daniel Dunbar | c1cf4a5 | 2008-09-24 04:04:31 +0000 | [diff] [blame] | 1425 | if (!EnumerationMutationFn) { |
| 1426 | CGM.ErrorUnsupported(&S, "Obj-C fast enumeration for this runtime"); |
| 1427 | return; |
| 1428 | } |
| 1429 | |
Devang Patel | bcbd03a | 2011-01-19 01:36:36 +0000 | [diff] [blame] | 1430 | CGDebugInfo *DI = getDebugInfo(); |
Eric Christopher | 73fb350 | 2011-10-13 21:45:18 +0000 | [diff] [blame] | 1431 | if (DI) |
| 1432 | DI->EmitLexicalBlockStart(Builder, S.getSourceRange().getBegin()); |
Devang Patel | bcbd03a | 2011-01-19 01:36:36 +0000 | [diff] [blame] | 1433 | |
Devang Patel | 9d99f2d | 2011-06-13 23:15:32 +0000 | [diff] [blame] | 1434 | // The local variable comes into scope immediately. |
| 1435 | AutoVarEmission variable = AutoVarEmission::invalid(); |
| 1436 | if (const DeclStmt *SD = dyn_cast<DeclStmt>(S.getElement())) |
| 1437 | variable = EmitAutoVarAlloca(*cast<VarDecl>(SD->getSingleDecl())); |
| 1438 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1439 | JumpDest LoopEnd = getJumpDestInCurrentScope("forcoll.end"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1440 | |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1441 | // Fast enumeration state. |
Douglas Gregor | 0815b57 | 2011-08-09 17:23:49 +0000 | [diff] [blame] | 1442 | QualType StateTy = CGM.getObjCFastEnumerationStateType(); |
Daniel Dunbar | 195337d | 2010-02-09 02:48:28 +0000 | [diff] [blame] | 1443 | llvm::Value *StatePtr = CreateMemTemp(StateTy, "state.ptr"); |
Anders Carlsson | 1884eb0 | 2010-05-22 17:35:42 +0000 | [diff] [blame] | 1444 | EmitNullInitialization(StatePtr, StateTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1445 | |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1446 | // Number of elements in the items array. |
Anders Carlsson | 2abd89c | 2008-08-31 04:05:03 +0000 | [diff] [blame] | 1447 | static const unsigned NumItems = 16; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1448 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1449 | // Fetch the countByEnumeratingWithState:objects:count: selector. |
Benjamin Kramer | ad46886 | 2010-03-30 11:36:44 +0000 | [diff] [blame] | 1450 | IdentifierInfo *II[] = { |
| 1451 | &CGM.getContext().Idents.get("countByEnumeratingWithState"), |
| 1452 | &CGM.getContext().Idents.get("objects"), |
| 1453 | &CGM.getContext().Idents.get("count") |
| 1454 | }; |
| 1455 | Selector FastEnumSel = |
| 1456 | CGM.getContext().Selectors.getSelector(llvm::array_lengthof(II), &II[0]); |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1457 | |
| 1458 | QualType ItemsTy = |
| 1459 | getContext().getConstantArrayType(getContext().getObjCIdType(), |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1460 | llvm::APInt(32, NumItems), |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1461 | ArrayType::Normal, 0); |
Daniel Dunbar | 195337d | 2010-02-09 02:48:28 +0000 | [diff] [blame] | 1462 | llvm::Value *ItemsPtr = CreateMemTemp(ItemsTy, "items.ptr"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1463 | |
John McCall | 990567c | 2011-07-27 01:07:15 +0000 | [diff] [blame] | 1464 | // Emit the collection pointer. In ARC, we do a retain. |
| 1465 | llvm::Value *Collection; |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1466 | if (getLangOpts().ObjCAutoRefCount) { |
John McCall | 990567c | 2011-07-27 01:07:15 +0000 | [diff] [blame] | 1467 | Collection = EmitARCRetainScalarExpr(S.getCollection()); |
| 1468 | |
| 1469 | // Enter a cleanup to do the release. |
| 1470 | EmitObjCConsumeObject(S.getCollection()->getType(), Collection); |
| 1471 | } else { |
| 1472 | Collection = EmitScalarExpr(S.getCollection()); |
| 1473 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1474 | |
John McCall | 4b302d3 | 2011-08-05 00:14:38 +0000 | [diff] [blame] | 1475 | // The 'continue' label needs to appear within the cleanup for the |
| 1476 | // collection object. |
| 1477 | JumpDest AfterBody = getJumpDestInCurrentScope("forcoll.next"); |
| 1478 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1479 | // Send it our message: |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1480 | CallArgList Args; |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1481 | |
| 1482 | // The first argument is a temporary of the enumeration-state type. |
Eli Friedman | 04c9a49 | 2011-05-02 17:57:46 +0000 | [diff] [blame] | 1483 | Args.add(RValue::get(StatePtr), getContext().getPointerType(StateTy)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1484 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1485 | // The second argument is a temporary array with space for NumItems |
| 1486 | // pointers. We'll actually be loading elements from the array |
| 1487 | // pointer written into the control state; this buffer is so that |
| 1488 | // collections that *aren't* backed by arrays can still queue up |
| 1489 | // batches of elements. |
Eli Friedman | 04c9a49 | 2011-05-02 17:57:46 +0000 | [diff] [blame] | 1490 | Args.add(RValue::get(ItemsPtr), getContext().getPointerType(ItemsTy)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1491 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1492 | // The third argument is the capacity of that temporary array. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1493 | llvm::Type *UnsignedLongLTy = ConvertType(getContext().UnsignedLongTy); |
Owen Anderson | 4a28d5d | 2009-07-24 23:12:58 +0000 | [diff] [blame] | 1494 | llvm::Constant *Count = llvm::ConstantInt::get(UnsignedLongLTy, NumItems); |
Eli Friedman | 04c9a49 | 2011-05-02 17:57:46 +0000 | [diff] [blame] | 1495 | Args.add(RValue::get(Count), getContext().UnsignedLongTy); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1496 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1497 | // Start the enumeration. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1498 | RValue CountRV = |
John McCall | ef072fd | 2010-05-22 01:48:05 +0000 | [diff] [blame] | 1499 | CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1500 | getContext().UnsignedLongTy, |
| 1501 | FastEnumSel, |
David Chisnall | c6cd5fd | 2010-04-28 19:33:36 +0000 | [diff] [blame] | 1502 | Collection, Args); |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1503 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1504 | // The initial number of objects that were returned in the buffer. |
| 1505 | llvm::Value *initialBufferLimit = CountRV.getScalarVal(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1506 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1507 | llvm::BasicBlock *EmptyBB = createBasicBlock("forcoll.empty"); |
| 1508 | llvm::BasicBlock *LoopInitBB = createBasicBlock("forcoll.loopinit"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1509 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1510 | llvm::Value *zero = llvm::Constant::getNullValue(UnsignedLongLTy); |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1511 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1512 | // If the limit pointer was zero to begin with, the collection is |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1513 | // empty; skip all this. Set the branch weight assuming this has the same |
| 1514 | // probability of exiting the loop as any other loop exit. |
| 1515 | uint64_t EntryCount = PGO.getCurrentRegionCount(); |
| 1516 | RegionCounter Cnt = getPGORegionCounter(&S); |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1517 | Builder.CreateCondBr(Builder.CreateICmpEQ(initialBufferLimit, zero, "iszero"), |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1518 | EmptyBB, LoopInitBB, |
| 1519 | PGO.createBranchWeights(EntryCount, Cnt.getCount())); |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1520 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1521 | // Otherwise, initialize the loop. |
| 1522 | EmitBlock(LoopInitBB); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1523 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1524 | // Save the initial mutations value. This is the value at an |
| 1525 | // address that was written into the state object by |
| 1526 | // countByEnumeratingWithState:objects:count:. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1527 | llvm::Value *StateMutationsPtrPtr = |
Anders Carlsson | 2abd89c | 2008-08-31 04:05:03 +0000 | [diff] [blame] | 1528 | Builder.CreateStructGEP(StatePtr, 2, "mutationsptr.ptr"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1529 | llvm::Value *StateMutationsPtr = Builder.CreateLoad(StateMutationsPtrPtr, |
Anders Carlsson | 2abd89c | 2008-08-31 04:05:03 +0000 | [diff] [blame] | 1530 | "mutationsptr"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1531 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1532 | llvm::Value *initialMutations = |
| 1533 | Builder.CreateLoad(StateMutationsPtr, "forcoll.initial-mutations"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1534 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1535 | // Start looping. This is the point we return to whenever we have a |
| 1536 | // fresh, non-empty batch of objects. |
| 1537 | llvm::BasicBlock *LoopBodyBB = createBasicBlock("forcoll.loopbody"); |
| 1538 | EmitBlock(LoopBodyBB); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1539 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1540 | // The current index into the buffer. |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 1541 | llvm::PHINode *index = Builder.CreatePHI(UnsignedLongLTy, 3, "forcoll.index"); |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1542 | index->addIncoming(zero, LoopInitBB); |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1543 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1544 | // The current buffer size. |
Jay Foad | bbf3bac | 2011-03-30 11:28:58 +0000 | [diff] [blame] | 1545 | llvm::PHINode *count = Builder.CreatePHI(UnsignedLongLTy, 3, "forcoll.count"); |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1546 | count->addIncoming(initialBufferLimit, LoopInitBB); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1547 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1548 | Cnt.beginRegion(Builder); |
| 1549 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1550 | // Check whether the mutations value has changed from where it was |
| 1551 | // at start. StateMutationsPtr should actually be invariant between |
| 1552 | // refreshes. |
Anders Carlsson | 2abd89c | 2008-08-31 04:05:03 +0000 | [diff] [blame] | 1553 | StateMutationsPtr = Builder.CreateLoad(StateMutationsPtrPtr, "mutationsptr"); |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1554 | llvm::Value *currentMutations |
| 1555 | = Builder.CreateLoad(StateMutationsPtr, "statemutations"); |
Anders Carlsson | 2abd89c | 2008-08-31 04:05:03 +0000 | [diff] [blame] | 1556 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1557 | llvm::BasicBlock *WasMutatedBB = createBasicBlock("forcoll.mutated"); |
Dan Gohman | 361cf98 | 2011-03-02 22:39:34 +0000 | [diff] [blame] | 1558 | llvm::BasicBlock *WasNotMutatedBB = createBasicBlock("forcoll.notmutated"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1559 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1560 | Builder.CreateCondBr(Builder.CreateICmpEQ(currentMutations, initialMutations), |
| 1561 | WasNotMutatedBB, WasMutatedBB); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1562 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1563 | // If so, call the enumeration-mutation function. |
| 1564 | EmitBlock(WasMutatedBB); |
Anders Carlsson | 2abd89c | 2008-08-31 04:05:03 +0000 | [diff] [blame] | 1565 | llvm::Value *V = |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1566 | Builder.CreateBitCast(Collection, |
Benjamin Kramer | 578faa8 | 2011-09-27 21:06:10 +0000 | [diff] [blame] | 1567 | ConvertType(getContext().getObjCIdType())); |
Daniel Dunbar | 2b2105e | 2009-02-03 23:55:40 +0000 | [diff] [blame] | 1568 | CallArgList Args2; |
Eli Friedman | 04c9a49 | 2011-05-02 17:57:46 +0000 | [diff] [blame] | 1569 | Args2.add(RValue::get(V), getContext().getObjCIdType()); |
Mike Stump | f5408fe | 2009-05-16 07:57:57 +0000 | [diff] [blame] | 1570 | // FIXME: We shouldn't need to get the function info here, the runtime already |
| 1571 | // should have computed it to build the function. |
John McCall | 0f3d097 | 2012-07-07 06:41:13 +0000 | [diff] [blame] | 1572 | EmitCall(CGM.getTypes().arrangeFreeFunctionCall(getContext().VoidTy, Args2, |
| 1573 | FunctionType::ExtInfo(), |
| 1574 | RequiredArgs::All), |
Anders Carlsson | f3c47c9 | 2009-12-24 19:25:24 +0000 | [diff] [blame] | 1575 | EnumerationMutationFn, ReturnValueSlot(), Args2); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1576 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1577 | // Otherwise, or if the mutation function returns, just continue. |
| 1578 | EmitBlock(WasNotMutatedBB); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1579 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1580 | // Initialize the element variable. |
| 1581 | RunCleanupsScope elementVariableScope(*this); |
John McCall | 57b3b6a | 2011-02-22 07:16:58 +0000 | [diff] [blame] | 1582 | bool elementIsVariable; |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1583 | LValue elementLValue; |
| 1584 | QualType elementType; |
| 1585 | if (const DeclStmt *SD = dyn_cast<DeclStmt>(S.getElement())) { |
John McCall | 57b3b6a | 2011-02-22 07:16:58 +0000 | [diff] [blame] | 1586 | // Initialize the variable, in case it's a __block variable or something. |
| 1587 | EmitAutoVarInit(variable); |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1588 | |
John McCall | 57b3b6a | 2011-02-22 07:16:58 +0000 | [diff] [blame] | 1589 | const VarDecl* D = cast<VarDecl>(SD->getSingleDecl()); |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 1590 | DeclRefExpr tempDRE(const_cast<VarDecl*>(D), false, D->getType(), |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1591 | VK_LValue, SourceLocation()); |
| 1592 | elementLValue = EmitLValue(&tempDRE); |
| 1593 | elementType = D->getType(); |
John McCall | 57b3b6a | 2011-02-22 07:16:58 +0000 | [diff] [blame] | 1594 | elementIsVariable = true; |
John McCall | 7acddac | 2011-06-17 06:42:21 +0000 | [diff] [blame] | 1595 | |
| 1596 | if (D->isARCPseudoStrong()) |
| 1597 | elementLValue.getQuals().setObjCLifetime(Qualifiers::OCL_ExplicitNone); |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1598 | } else { |
| 1599 | elementLValue = LValue(); // suppress warning |
| 1600 | elementType = cast<Expr>(S.getElement())->getType(); |
John McCall | 57b3b6a | 2011-02-22 07:16:58 +0000 | [diff] [blame] | 1601 | elementIsVariable = false; |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1602 | } |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1603 | llvm::Type *convertedElementType = ConvertType(elementType); |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1604 | |
| 1605 | // Fetch the buffer out of the enumeration state. |
| 1606 | // TODO: this pointer should actually be invariant between |
| 1607 | // refreshes, which would help us do certain loop optimizations. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1608 | llvm::Value *StateItemsPtr = |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1609 | Builder.CreateStructGEP(StatePtr, 1, "stateitems.ptr"); |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1610 | llvm::Value *EnumStateItems = |
| 1611 | Builder.CreateLoad(StateItemsPtr, "stateitems"); |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1612 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1613 | // Fetch the value at the current index from the buffer. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1614 | llvm::Value *CurrentItemPtr = |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1615 | Builder.CreateGEP(EnumStateItems, index, "currentitem.ptr"); |
| 1616 | llvm::Value *CurrentItem = Builder.CreateLoad(CurrentItemPtr); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1617 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1618 | // Cast that value to the right type. |
| 1619 | CurrentItem = Builder.CreateBitCast(CurrentItem, convertedElementType, |
| 1620 | "currentitem"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1621 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1622 | // Make sure we have an l-value. Yes, this gets evaluated every |
| 1623 | // time through the loop. |
John McCall | 7acddac | 2011-06-17 06:42:21 +0000 | [diff] [blame] | 1624 | if (!elementIsVariable) { |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1625 | elementLValue = EmitLValue(cast<Expr>(S.getElement())); |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1626 | EmitStoreThroughLValue(RValue::get(CurrentItem), elementLValue); |
John McCall | 7acddac | 2011-06-17 06:42:21 +0000 | [diff] [blame] | 1627 | } else { |
| 1628 | EmitScalarInit(CurrentItem, elementLValue); |
| 1629 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1630 | |
John McCall | 57b3b6a | 2011-02-22 07:16:58 +0000 | [diff] [blame] | 1631 | // If we do have an element variable, this assignment is the end of |
| 1632 | // its initialization. |
| 1633 | if (elementIsVariable) |
| 1634 | EmitAutoVarCleanups(variable); |
| 1635 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1636 | // Perform the loop body, setting up break and continue labels. |
Anders Carlsson | e4b6d34 | 2009-02-10 05:52:02 +0000 | [diff] [blame] | 1637 | BreakContinueStack.push_back(BreakContinue(LoopEnd, AfterBody)); |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1638 | { |
| 1639 | RunCleanupsScope Scope(*this); |
| 1640 | EmitStmt(S.getBody()); |
| 1641 | } |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1642 | BreakContinueStack.pop_back(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1643 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1644 | // Destroy the element variable now. |
| 1645 | elementVariableScope.ForceCleanup(); |
| 1646 | |
| 1647 | // Check whether there are more elements. |
John McCall | ff8e115 | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 1648 | EmitBlock(AfterBody.getBlock()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1649 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1650 | llvm::BasicBlock *FetchMoreBB = createBasicBlock("forcoll.refetch"); |
Fariborz Jahanian | f0906c4 | 2009-01-06 18:56:31 +0000 | [diff] [blame] | 1651 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1652 | // First we check in the local buffer. |
| 1653 | llvm::Value *indexPlusOne |
| 1654 | = Builder.CreateAdd(index, llvm::ConstantInt::get(UnsignedLongLTy, 1)); |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1655 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1656 | // If we haven't overrun the buffer yet, we can continue. |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1657 | // Set the branch weights based on the simplifying assumption that this is |
| 1658 | // like a while-loop, i.e., ignoring that the false branch fetches more |
| 1659 | // elements and then returns to the loop. |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1660 | Builder.CreateCondBr(Builder.CreateICmpULT(indexPlusOne, count), |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1661 | LoopBodyBB, FetchMoreBB, |
| 1662 | PGO.createBranchWeights(Cnt.getCount(), EntryCount)); |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1663 | |
| 1664 | index->addIncoming(indexPlusOne, AfterBody.getBlock()); |
| 1665 | count->addIncoming(count, AfterBody.getBlock()); |
| 1666 | |
| 1667 | // Otherwise, we have to fetch more elements. |
| 1668 | EmitBlock(FetchMoreBB); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1669 | |
| 1670 | CountRV = |
John McCall | ef072fd | 2010-05-22 01:48:05 +0000 | [diff] [blame] | 1671 | CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1672 | getContext().UnsignedLongTy, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1673 | FastEnumSel, |
David Chisnall | c6cd5fd | 2010-04-28 19:33:36 +0000 | [diff] [blame] | 1674 | Collection, Args); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1675 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1676 | // If we got a zero count, we're done. |
| 1677 | llvm::Value *refetchCount = CountRV.getScalarVal(); |
| 1678 | |
| 1679 | // (note that the message send might split FetchMoreBB) |
| 1680 | index->addIncoming(zero, Builder.GetInsertBlock()); |
| 1681 | count->addIncoming(refetchCount, Builder.GetInsertBlock()); |
| 1682 | |
| 1683 | Builder.CreateCondBr(Builder.CreateICmpEQ(refetchCount, zero), |
| 1684 | EmptyBB, LoopBodyBB); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1685 | |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1686 | // No more elements. |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1687 | EmitBlock(EmptyBB); |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1688 | |
John McCall | 57b3b6a | 2011-02-22 07:16:58 +0000 | [diff] [blame] | 1689 | if (!elementIsVariable) { |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1690 | // If the element was not a declaration, set it to be null. |
| 1691 | |
John McCall | d88687f | 2011-01-07 01:49:06 +0000 | [diff] [blame] | 1692 | llvm::Value *null = llvm::Constant::getNullValue(convertedElementType); |
| 1693 | elementLValue = EmitLValue(cast<Expr>(S.getElement())); |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 1694 | EmitStoreThroughLValue(RValue::get(null), elementLValue); |
Anders Carlsson | f484c31 | 2008-08-31 02:33:12 +0000 | [diff] [blame] | 1695 | } |
| 1696 | |
Eric Christopher | 73fb350 | 2011-10-13 21:45:18 +0000 | [diff] [blame] | 1697 | if (DI) |
| 1698 | DI->EmitLexicalBlockEnd(Builder, S.getSourceRange().getEnd()); |
Devang Patel | bcbd03a | 2011-01-19 01:36:36 +0000 | [diff] [blame] | 1699 | |
John McCall | 990567c | 2011-07-27 01:07:15 +0000 | [diff] [blame] | 1700 | // Leave the cleanup we entered in ARC. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 1701 | if (getLangOpts().ObjCAutoRefCount) |
John McCall | 990567c | 2011-07-27 01:07:15 +0000 | [diff] [blame] | 1702 | PopCleanupBlock(); |
| 1703 | |
John McCall | ff8e115 | 2010-07-23 21:56:41 +0000 | [diff] [blame] | 1704 | EmitBlock(LoopEnd.getBlock()); |
Anders Carlsson | 3d8400d | 2008-08-30 19:51:14 +0000 | [diff] [blame] | 1705 | } |
| 1706 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1707 | void CodeGenFunction::EmitObjCAtTryStmt(const ObjCAtTryStmt &S) { |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 1708 | CGM.getObjCRuntime().EmitTryStmt(*this, S); |
Anders Carlsson | 64d5d6c | 2008-09-09 10:04:29 +0000 | [diff] [blame] | 1709 | } |
| 1710 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1711 | void CodeGenFunction::EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S) { |
Anders Carlsson | 64d5d6c | 2008-09-09 10:04:29 +0000 | [diff] [blame] | 1712 | CGM.getObjCRuntime().EmitThrowStmt(*this, S); |
| 1713 | } |
| 1714 | |
Chris Lattner | 10cac6f | 2008-11-15 21:26:17 +0000 | [diff] [blame] | 1715 | void CodeGenFunction::EmitObjCAtSynchronizedStmt( |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1716 | const ObjCAtSynchronizedStmt &S) { |
John McCall | f1549f6 | 2010-07-06 01:34:17 +0000 | [diff] [blame] | 1717 | CGM.getObjCRuntime().EmitSynchronizedStmt(*this, S); |
Chris Lattner | 10cac6f | 2008-11-15 21:26:17 +0000 | [diff] [blame] | 1718 | } |
| 1719 | |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 1720 | /// Produce the code for a CK_ARCProduceObject. Just does a |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1721 | /// primitive retain. |
| 1722 | llvm::Value *CodeGenFunction::EmitObjCProduceObject(QualType type, |
| 1723 | llvm::Value *value) { |
| 1724 | return EmitARCRetain(type, value); |
| 1725 | } |
| 1726 | |
| 1727 | namespace { |
| 1728 | struct CallObjCRelease : EHScopeStack::Cleanup { |
John McCall | bddfd87 | 2011-08-03 22:24:24 +0000 | [diff] [blame] | 1729 | CallObjCRelease(llvm::Value *object) : object(object) {} |
| 1730 | llvm::Value *object; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1731 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 1732 | void Emit(CodeGenFunction &CGF, Flags flags) override { |
John McCall | 5b07e80 | 2013-03-13 03:10:54 +0000 | [diff] [blame] | 1733 | // Releases at the end of the full-expression are imprecise. |
| 1734 | CGF.EmitARCRelease(object, ARCImpreciseLifetime); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1735 | } |
| 1736 | }; |
| 1737 | } |
| 1738 | |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 1739 | /// Produce the code for a CK_ARCConsumeObject. Does a primitive |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1740 | /// release at the end of the full-expression. |
| 1741 | llvm::Value *CodeGenFunction::EmitObjCConsumeObject(QualType type, |
| 1742 | llvm::Value *object) { |
| 1743 | // If we're in a conditional branch, we need to make the cleanup |
John McCall | bddfd87 | 2011-08-03 22:24:24 +0000 | [diff] [blame] | 1744 | // conditional. |
| 1745 | pushFullExprCleanup<CallObjCRelease>(getARCCleanupKind(), object); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1746 | return object; |
| 1747 | } |
| 1748 | |
| 1749 | llvm::Value *CodeGenFunction::EmitObjCExtendObjectLifetime(QualType type, |
| 1750 | llvm::Value *value) { |
| 1751 | return EmitARCRetainAutorelease(type, value); |
| 1752 | } |
| 1753 | |
John McCall | b6a6079 | 2013-03-23 02:35:54 +0000 | [diff] [blame] | 1754 | /// Given a number of pointers, inform the optimizer that they're |
| 1755 | /// being intrinsically used up until this point in the program. |
| 1756 | void CodeGenFunction::EmitARCIntrinsicUse(ArrayRef<llvm::Value*> values) { |
| 1757 | llvm::Constant *&fn = CGM.getARCEntrypoints().clang_arc_use; |
| 1758 | if (!fn) { |
| 1759 | llvm::FunctionType *fnType = |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 1760 | llvm::FunctionType::get(CGM.VoidTy, None, true); |
John McCall | b6a6079 | 2013-03-23 02:35:54 +0000 | [diff] [blame] | 1761 | fn = CGM.CreateRuntimeFunction(fnType, "clang.arc.use"); |
| 1762 | } |
| 1763 | |
| 1764 | // This isn't really a "runtime" function, but as an intrinsic it |
| 1765 | // doesn't really matter as long as we align things up. |
| 1766 | EmitNounwindRuntimeCall(fn, values); |
| 1767 | } |
| 1768 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1769 | |
| 1770 | static llvm::Constant *createARCRuntimeFunction(CodeGenModule &CGM, |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1771 | llvm::FunctionType *type, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1772 | StringRef fnName) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1773 | llvm::Constant *fn = CGM.CreateRuntimeFunction(type, fnName); |
| 1774 | |
Michael Gottesman | 554b07d | 2013-02-02 00:57:44 +0000 | [diff] [blame] | 1775 | if (llvm::Function *f = dyn_cast<llvm::Function>(fn)) { |
Michael Gottesman | cfe18a1 | 2013-02-02 01:05:06 +0000 | [diff] [blame] | 1776 | // If the target runtime doesn't naturally support ARC, emit weak |
| 1777 | // references to the runtime support library. We don't really |
| 1778 | // permit this to fail, but we need a particular relocation style. |
Michael Gottesman | 554b07d | 2013-02-02 00:57:44 +0000 | [diff] [blame] | 1779 | if (!CGM.getLangOpts().ObjCRuntime.hasNativeARC()) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1780 | f->setLinkage(llvm::Function::ExternalWeakLinkage); |
Michael Gottesman | 554b07d | 2013-02-02 00:57:44 +0000 | [diff] [blame] | 1781 | } else if (fnName == "objc_retain" || fnName == "objc_release") { |
| 1782 | // If we have Native ARC, set nonlazybind attribute for these APIs for |
| 1783 | // performance. |
Bill Wendling | 72390b3 | 2012-12-20 19:27:06 +0000 | [diff] [blame] | 1784 | f->addFnAttr(llvm::Attribute::NonLazyBind); |
Michael Gottesman | db99e8b | 2013-02-02 01:03:01 +0000 | [diff] [blame] | 1785 | } |
Michael Gottesman | 554b07d | 2013-02-02 00:57:44 +0000 | [diff] [blame] | 1786 | } |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1787 | |
| 1788 | return fn; |
| 1789 | } |
| 1790 | |
| 1791 | /// Perform an operation having the signature |
| 1792 | /// i8* (i8*) |
| 1793 | /// where a null input causes a no-op and returns null. |
| 1794 | static llvm::Value *emitARCValueOperation(CodeGenFunction &CGF, |
| 1795 | llvm::Value *value, |
| 1796 | llvm::Constant *&fn, |
Chad Rosier | df76f1e | 2012-12-12 17:52:21 +0000 | [diff] [blame] | 1797 | StringRef fnName, |
| 1798 | bool isTailCall = false) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1799 | if (isa<llvm::ConstantPointerNull>(value)) return value; |
| 1800 | |
| 1801 | if (!fn) { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1802 | llvm::FunctionType *fnType = |
Benjamin Kramer | 76ecdfc | 2013-03-07 21:18:31 +0000 | [diff] [blame] | 1803 | llvm::FunctionType::get(CGF.Int8PtrTy, CGF.Int8PtrTy, false); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1804 | fn = createARCRuntimeFunction(CGF.CGM, fnType, fnName); |
| 1805 | } |
| 1806 | |
| 1807 | // Cast the argument to 'id'. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1808 | llvm::Type *origType = value->getType(); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1809 | value = CGF.Builder.CreateBitCast(value, CGF.Int8PtrTy); |
| 1810 | |
| 1811 | // Call the function. |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1812 | llvm::CallInst *call = CGF.EmitNounwindRuntimeCall(fn, value); |
Chad Rosier | df76f1e | 2012-12-12 17:52:21 +0000 | [diff] [blame] | 1813 | if (isTailCall) |
| 1814 | call->setTailCall(); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1815 | |
| 1816 | // Cast the result back to the original type. |
| 1817 | return CGF.Builder.CreateBitCast(call, origType); |
| 1818 | } |
| 1819 | |
| 1820 | /// Perform an operation having the following signature: |
| 1821 | /// i8* (i8**) |
| 1822 | static llvm::Value *emitARCLoadOperation(CodeGenFunction &CGF, |
| 1823 | llvm::Value *addr, |
| 1824 | llvm::Constant *&fn, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1825 | StringRef fnName) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1826 | if (!fn) { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1827 | llvm::FunctionType *fnType = |
Benjamin Kramer | 76ecdfc | 2013-03-07 21:18:31 +0000 | [diff] [blame] | 1828 | llvm::FunctionType::get(CGF.Int8PtrTy, CGF.Int8PtrPtrTy, false); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1829 | fn = createARCRuntimeFunction(CGF.CGM, fnType, fnName); |
| 1830 | } |
| 1831 | |
| 1832 | // Cast the argument to 'id*'. |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1833 | llvm::Type *origType = addr->getType(); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1834 | addr = CGF.Builder.CreateBitCast(addr, CGF.Int8PtrPtrTy); |
| 1835 | |
| 1836 | // Call the function. |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1837 | llvm::Value *result = CGF.EmitNounwindRuntimeCall(fn, addr); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1838 | |
| 1839 | // Cast the result back to a dereference of the original type. |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1840 | if (origType != CGF.Int8PtrPtrTy) |
| 1841 | result = CGF.Builder.CreateBitCast(result, |
| 1842 | cast<llvm::PointerType>(origType)->getElementType()); |
| 1843 | |
| 1844 | return result; |
| 1845 | } |
| 1846 | |
| 1847 | /// Perform an operation having the following signature: |
| 1848 | /// i8* (i8**, i8*) |
| 1849 | static llvm::Value *emitARCStoreOperation(CodeGenFunction &CGF, |
| 1850 | llvm::Value *addr, |
| 1851 | llvm::Value *value, |
| 1852 | llvm::Constant *&fn, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1853 | StringRef fnName, |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1854 | bool ignored) { |
| 1855 | assert(cast<llvm::PointerType>(addr->getType())->getElementType() |
| 1856 | == value->getType()); |
| 1857 | |
| 1858 | if (!fn) { |
Benjamin Kramer | 1d236ab | 2011-10-15 12:20:02 +0000 | [diff] [blame] | 1859 | llvm::Type *argTypes[] = { CGF.Int8PtrPtrTy, CGF.Int8PtrTy }; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1860 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1861 | llvm::FunctionType *fnType |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1862 | = llvm::FunctionType::get(CGF.Int8PtrTy, argTypes, false); |
| 1863 | fn = createARCRuntimeFunction(CGF.CGM, fnType, fnName); |
| 1864 | } |
| 1865 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1866 | llvm::Type *origType = value->getType(); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1867 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1868 | llvm::Value *args[] = { |
| 1869 | CGF.Builder.CreateBitCast(addr, CGF.Int8PtrPtrTy), |
| 1870 | CGF.Builder.CreateBitCast(value, CGF.Int8PtrTy) |
| 1871 | }; |
| 1872 | llvm::CallInst *result = CGF.EmitNounwindRuntimeCall(fn, args); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1873 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 1874 | if (ignored) return nullptr; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1875 | |
| 1876 | return CGF.Builder.CreateBitCast(result, origType); |
| 1877 | } |
| 1878 | |
| 1879 | /// Perform an operation having the following signature: |
| 1880 | /// void (i8**, i8**) |
| 1881 | static void emitARCCopyOperation(CodeGenFunction &CGF, |
| 1882 | llvm::Value *dst, |
| 1883 | llvm::Value *src, |
| 1884 | llvm::Constant *&fn, |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1885 | StringRef fnName) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1886 | assert(dst->getType() == src->getType()); |
| 1887 | |
| 1888 | if (!fn) { |
Benjamin Kramer | 76ecdfc | 2013-03-07 21:18:31 +0000 | [diff] [blame] | 1889 | llvm::Type *argTypes[] = { CGF.Int8PtrPtrTy, CGF.Int8PtrPtrTy }; |
| 1890 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 1891 | llvm::FunctionType *fnType |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1892 | = llvm::FunctionType::get(CGF.Builder.getVoidTy(), argTypes, false); |
| 1893 | fn = createARCRuntimeFunction(CGF.CGM, fnType, fnName); |
| 1894 | } |
| 1895 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 1896 | llvm::Value *args[] = { |
| 1897 | CGF.Builder.CreateBitCast(dst, CGF.Int8PtrPtrTy), |
| 1898 | CGF.Builder.CreateBitCast(src, CGF.Int8PtrPtrTy) |
| 1899 | }; |
| 1900 | CGF.EmitNounwindRuntimeCall(fn, args); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1901 | } |
| 1902 | |
| 1903 | /// Produce the code to do a retain. Based on the type, calls one of: |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 1904 | /// call i8* \@objc_retain(i8* %value) |
| 1905 | /// call i8* \@objc_retainBlock(i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1906 | llvm::Value *CodeGenFunction::EmitARCRetain(QualType type, llvm::Value *value) { |
| 1907 | if (type->isBlockPointerType()) |
John McCall | 348f16f | 2011-10-04 06:23:45 +0000 | [diff] [blame] | 1908 | return EmitARCRetainBlock(value, /*mandatory*/ false); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1909 | else |
| 1910 | return EmitARCRetainNonBlock(value); |
| 1911 | } |
| 1912 | |
| 1913 | /// Retain the given object, with normal retain semantics. |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 1914 | /// call i8* \@objc_retain(i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1915 | llvm::Value *CodeGenFunction::EmitARCRetainNonBlock(llvm::Value *value) { |
| 1916 | return emitARCValueOperation(*this, value, |
| 1917 | CGM.getARCEntrypoints().objc_retain, |
| 1918 | "objc_retain"); |
| 1919 | } |
| 1920 | |
| 1921 | /// Retain the given block, with _Block_copy semantics. |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 1922 | /// call i8* \@objc_retainBlock(i8* %value) |
John McCall | 348f16f | 2011-10-04 06:23:45 +0000 | [diff] [blame] | 1923 | /// |
| 1924 | /// \param mandatory - If false, emit the call with metadata |
| 1925 | /// indicating that it's okay for the optimizer to eliminate this call |
| 1926 | /// if it can prove that the block never escapes except down the stack. |
| 1927 | llvm::Value *CodeGenFunction::EmitARCRetainBlock(llvm::Value *value, |
| 1928 | bool mandatory) { |
| 1929 | llvm::Value *result |
| 1930 | = emitARCValueOperation(*this, value, |
| 1931 | CGM.getARCEntrypoints().objc_retainBlock, |
| 1932 | "objc_retainBlock"); |
| 1933 | |
| 1934 | // If the copy isn't mandatory, add !clang.arc.copy_on_escape to |
| 1935 | // tell the optimizer that it doesn't need to do this copy if the |
| 1936 | // block doesn't escape, where being passed as an argument doesn't |
| 1937 | // count as escaping. |
| 1938 | if (!mandatory && isa<llvm::Instruction>(result)) { |
| 1939 | llvm::CallInst *call |
| 1940 | = cast<llvm::CallInst>(result->stripPointerCasts()); |
| 1941 | assert(call->getCalledValue() == CGM.getARCEntrypoints().objc_retainBlock); |
| 1942 | |
| 1943 | SmallVector<llvm::Value*,1> args; |
| 1944 | call->setMetadata("clang.arc.copy_on_escape", |
| 1945 | llvm::MDNode::get(Builder.getContext(), args)); |
| 1946 | } |
| 1947 | |
| 1948 | return result; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1949 | } |
| 1950 | |
| 1951 | /// Retain the given object which is the result of a function call. |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 1952 | /// call i8* \@objc_retainAutoreleasedReturnValue(i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1953 | /// |
| 1954 | /// Yes, this function name is one character away from a different |
| 1955 | /// call with completely different semantics. |
| 1956 | llvm::Value * |
| 1957 | CodeGenFunction::EmitARCRetainAutoreleasedReturnValue(llvm::Value *value) { |
| 1958 | // Fetch the void(void) inline asm which marks that we're going to |
| 1959 | // retain the autoreleased return value. |
| 1960 | llvm::InlineAsm *&marker |
| 1961 | = CGM.getARCEntrypoints().retainAutoreleasedReturnValueMarker; |
| 1962 | if (!marker) { |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 1963 | StringRef assembly |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1964 | = CGM.getTargetCodeGenInfo() |
| 1965 | .getARCRetainAutoreleasedReturnValueMarker(); |
| 1966 | |
| 1967 | // If we have an empty assembly string, there's nothing to do. |
| 1968 | if (assembly.empty()) { |
| 1969 | |
| 1970 | // Otherwise, at -O0, build an inline asm that we're going to call |
| 1971 | // in a moment. |
| 1972 | } else if (CGM.getCodeGenOpts().OptimizationLevel == 0) { |
| 1973 | llvm::FunctionType *type = |
Chris Lattner | 8b41868 | 2012-02-07 00:39:47 +0000 | [diff] [blame] | 1974 | llvm::FunctionType::get(VoidTy, /*variadic*/false); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1975 | |
| 1976 | marker = llvm::InlineAsm::get(type, assembly, "", /*sideeffects*/ true); |
| 1977 | |
| 1978 | // If we're at -O1 and above, we don't want to litter the code |
| 1979 | // with this marker yet, so leave a breadcrumb for the ARC |
| 1980 | // optimizer to pick up. |
| 1981 | } else { |
| 1982 | llvm::NamedMDNode *metadata = |
| 1983 | CGM.getModule().getOrInsertNamedMetadata( |
| 1984 | "clang.arc.retainAutoreleasedReturnValueMarker"); |
| 1985 | assert(metadata->getNumOperands() <= 1); |
| 1986 | if (metadata->getNumOperands() == 0) { |
| 1987 | llvm::Value *string = llvm::MDString::get(getLLVMContext(), assembly); |
Jay Foad | da549e8 | 2011-07-29 13:56:53 +0000 | [diff] [blame] | 1988 | metadata->addOperand(llvm::MDNode::get(getLLVMContext(), string)); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 1989 | } |
| 1990 | } |
| 1991 | } |
| 1992 | |
| 1993 | // Call the marker asm if we made one, which we do only at -O0. |
| 1994 | if (marker) Builder.CreateCall(marker); |
| 1995 | |
| 1996 | return emitARCValueOperation(*this, value, |
| 1997 | CGM.getARCEntrypoints().objc_retainAutoreleasedReturnValue, |
| 1998 | "objc_retainAutoreleasedReturnValue"); |
| 1999 | } |
| 2000 | |
| 2001 | /// Release the given object. |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2002 | /// call void \@objc_release(i8* %value) |
John McCall | 5b07e80 | 2013-03-13 03:10:54 +0000 | [diff] [blame] | 2003 | void CodeGenFunction::EmitARCRelease(llvm::Value *value, |
| 2004 | ARCPreciseLifetime_t precise) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2005 | if (isa<llvm::ConstantPointerNull>(value)) return; |
| 2006 | |
| 2007 | llvm::Constant *&fn = CGM.getARCEntrypoints().objc_release; |
| 2008 | if (!fn) { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2009 | llvm::FunctionType *fnType = |
Benjamin Kramer | 76ecdfc | 2013-03-07 21:18:31 +0000 | [diff] [blame] | 2010 | llvm::FunctionType::get(Builder.getVoidTy(), Int8PtrTy, false); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2011 | fn = createARCRuntimeFunction(CGM, fnType, "objc_release"); |
| 2012 | } |
| 2013 | |
| 2014 | // Cast the argument to 'id'. |
| 2015 | value = Builder.CreateBitCast(value, Int8PtrTy); |
| 2016 | |
| 2017 | // Call objc_release. |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2018 | llvm::CallInst *call = EmitNounwindRuntimeCall(fn, value); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2019 | |
John McCall | 5b07e80 | 2013-03-13 03:10:54 +0000 | [diff] [blame] | 2020 | if (precise == ARCImpreciseLifetime) { |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 2021 | SmallVector<llvm::Value*,1> args; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2022 | call->setMetadata("clang.imprecise_release", |
| 2023 | llvm::MDNode::get(Builder.getContext(), args)); |
| 2024 | } |
| 2025 | } |
| 2026 | |
John McCall | 015f33b | 2012-10-17 02:28:37 +0000 | [diff] [blame] | 2027 | /// Destroy a __strong variable. |
| 2028 | /// |
| 2029 | /// At -O0, emit a call to store 'null' into the address; |
| 2030 | /// instrumenting tools prefer this because the address is exposed, |
| 2031 | /// but it's relatively cumbersome to optimize. |
| 2032 | /// |
| 2033 | /// At -O1 and above, just load and call objc_release. |
| 2034 | /// |
| 2035 | /// call void \@objc_storeStrong(i8** %addr, i8* null) |
John McCall | 5b07e80 | 2013-03-13 03:10:54 +0000 | [diff] [blame] | 2036 | void CodeGenFunction::EmitARCDestroyStrong(llvm::Value *addr, |
| 2037 | ARCPreciseLifetime_t precise) { |
John McCall | 015f33b | 2012-10-17 02:28:37 +0000 | [diff] [blame] | 2038 | if (CGM.getCodeGenOpts().OptimizationLevel == 0) { |
| 2039 | llvm::PointerType *addrTy = cast<llvm::PointerType>(addr->getType()); |
| 2040 | llvm::Value *null = llvm::ConstantPointerNull::get( |
| 2041 | cast<llvm::PointerType>(addrTy->getElementType())); |
| 2042 | EmitARCStoreStrongCall(addr, null, /*ignored*/ true); |
| 2043 | return; |
| 2044 | } |
| 2045 | |
| 2046 | llvm::Value *value = Builder.CreateLoad(addr); |
| 2047 | EmitARCRelease(value, precise); |
| 2048 | } |
| 2049 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2050 | /// Store into a strong object. Always calls this: |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2051 | /// call void \@objc_storeStrong(i8** %addr, i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2052 | llvm::Value *CodeGenFunction::EmitARCStoreStrongCall(llvm::Value *addr, |
| 2053 | llvm::Value *value, |
| 2054 | bool ignored) { |
| 2055 | assert(cast<llvm::PointerType>(addr->getType())->getElementType() |
| 2056 | == value->getType()); |
| 2057 | |
| 2058 | llvm::Constant *&fn = CGM.getARCEntrypoints().objc_storeStrong; |
| 2059 | if (!fn) { |
Chris Lattner | 9cbe4f0 | 2011-07-09 17:41:47 +0000 | [diff] [blame] | 2060 | llvm::Type *argTypes[] = { Int8PtrPtrTy, Int8PtrTy }; |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2061 | llvm::FunctionType *fnType |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2062 | = llvm::FunctionType::get(Builder.getVoidTy(), argTypes, false); |
| 2063 | fn = createARCRuntimeFunction(CGM, fnType, "objc_storeStrong"); |
| 2064 | } |
| 2065 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2066 | llvm::Value *args[] = { |
| 2067 | Builder.CreateBitCast(addr, Int8PtrPtrTy), |
| 2068 | Builder.CreateBitCast(value, Int8PtrTy) |
| 2069 | }; |
| 2070 | EmitNounwindRuntimeCall(fn, args); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2071 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2072 | if (ignored) return nullptr; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2073 | return value; |
| 2074 | } |
| 2075 | |
| 2076 | /// Store into a strong object. Sometimes calls this: |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2077 | /// call void \@objc_storeStrong(i8** %addr, i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2078 | /// Other times, breaks it down into components. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2079 | llvm::Value *CodeGenFunction::EmitARCStoreStrong(LValue dst, |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2080 | llvm::Value *newValue, |
| 2081 | bool ignored) { |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2082 | QualType type = dst.getType(); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2083 | bool isBlock = type->isBlockPointerType(); |
| 2084 | |
| 2085 | // Use a store barrier at -O0 unless this is a block type or the |
| 2086 | // lvalue is inadequately aligned. |
| 2087 | if (shouldUseFusedARCCalls() && |
| 2088 | !isBlock && |
Eli Friedman | 6da2c71 | 2011-12-03 04:14:32 +0000 | [diff] [blame] | 2089 | (dst.getAlignment().isZero() || |
| 2090 | dst.getAlignment() >= CharUnits::fromQuantity(PointerAlignInBytes))) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2091 | return EmitARCStoreStrongCall(dst.getAddress(), newValue, ignored); |
| 2092 | } |
| 2093 | |
| 2094 | // Otherwise, split it out. |
| 2095 | |
| 2096 | // Retain the new value. |
| 2097 | newValue = EmitARCRetain(type, newValue); |
| 2098 | |
| 2099 | // Read the old value. |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2100 | llvm::Value *oldValue = EmitLoadOfScalar(dst, SourceLocation()); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2101 | |
| 2102 | // Store. We do this before the release so that any deallocs won't |
| 2103 | // see the old value. |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2104 | EmitStoreOfScalar(newValue, dst); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2105 | |
| 2106 | // Finally, release the old value. |
John McCall | 5b07e80 | 2013-03-13 03:10:54 +0000 | [diff] [blame] | 2107 | EmitARCRelease(oldValue, dst.isARCPreciseLifetime()); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2108 | |
| 2109 | return newValue; |
| 2110 | } |
| 2111 | |
| 2112 | /// Autorelease the given object. |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2113 | /// call i8* \@objc_autorelease(i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2114 | llvm::Value *CodeGenFunction::EmitARCAutorelease(llvm::Value *value) { |
| 2115 | return emitARCValueOperation(*this, value, |
| 2116 | CGM.getARCEntrypoints().objc_autorelease, |
| 2117 | "objc_autorelease"); |
| 2118 | } |
| 2119 | |
| 2120 | /// Autorelease the given object. |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2121 | /// call i8* \@objc_autoreleaseReturnValue(i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2122 | llvm::Value * |
| 2123 | CodeGenFunction::EmitARCAutoreleaseReturnValue(llvm::Value *value) { |
| 2124 | return emitARCValueOperation(*this, value, |
| 2125 | CGM.getARCEntrypoints().objc_autoreleaseReturnValue, |
Chad Rosier | df76f1e | 2012-12-12 17:52:21 +0000 | [diff] [blame] | 2126 | "objc_autoreleaseReturnValue", |
| 2127 | /*isTailCall*/ true); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2128 | } |
| 2129 | |
| 2130 | /// Do a fused retain/autorelease of the given object. |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2131 | /// call i8* \@objc_retainAutoreleaseReturnValue(i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2132 | llvm::Value * |
| 2133 | CodeGenFunction::EmitARCRetainAutoreleaseReturnValue(llvm::Value *value) { |
| 2134 | return emitARCValueOperation(*this, value, |
| 2135 | CGM.getARCEntrypoints().objc_retainAutoreleaseReturnValue, |
Chad Rosier | df76f1e | 2012-12-12 17:52:21 +0000 | [diff] [blame] | 2136 | "objc_retainAutoreleaseReturnValue", |
| 2137 | /*isTailCall*/ true); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2138 | } |
| 2139 | |
| 2140 | /// Do a fused retain/autorelease of the given object. |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2141 | /// call i8* \@objc_retainAutorelease(i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2142 | /// or |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2143 | /// %retain = call i8* \@objc_retainBlock(i8* %value) |
| 2144 | /// call i8* \@objc_autorelease(i8* %retain) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2145 | llvm::Value *CodeGenFunction::EmitARCRetainAutorelease(QualType type, |
| 2146 | llvm::Value *value) { |
| 2147 | if (!type->isBlockPointerType()) |
| 2148 | return EmitARCRetainAutoreleaseNonBlock(value); |
| 2149 | |
| 2150 | if (isa<llvm::ConstantPointerNull>(value)) return value; |
| 2151 | |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2152 | llvm::Type *origType = value->getType(); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2153 | value = Builder.CreateBitCast(value, Int8PtrTy); |
John McCall | 348f16f | 2011-10-04 06:23:45 +0000 | [diff] [blame] | 2154 | value = EmitARCRetainBlock(value, /*mandatory*/ true); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2155 | value = EmitARCAutorelease(value); |
| 2156 | return Builder.CreateBitCast(value, origType); |
| 2157 | } |
| 2158 | |
| 2159 | /// Do a fused retain/autorelease of the given object. |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2160 | /// call i8* \@objc_retainAutorelease(i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2161 | llvm::Value * |
| 2162 | CodeGenFunction::EmitARCRetainAutoreleaseNonBlock(llvm::Value *value) { |
| 2163 | return emitARCValueOperation(*this, value, |
| 2164 | CGM.getARCEntrypoints().objc_retainAutorelease, |
| 2165 | "objc_retainAutorelease"); |
| 2166 | } |
| 2167 | |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2168 | /// i8* \@objc_loadWeak(i8** %addr) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2169 | /// Essentially objc_autorelease(objc_loadWeakRetained(addr)). |
| 2170 | llvm::Value *CodeGenFunction::EmitARCLoadWeak(llvm::Value *addr) { |
| 2171 | return emitARCLoadOperation(*this, addr, |
| 2172 | CGM.getARCEntrypoints().objc_loadWeak, |
| 2173 | "objc_loadWeak"); |
| 2174 | } |
| 2175 | |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2176 | /// i8* \@objc_loadWeakRetained(i8** %addr) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2177 | llvm::Value *CodeGenFunction::EmitARCLoadWeakRetained(llvm::Value *addr) { |
| 2178 | return emitARCLoadOperation(*this, addr, |
| 2179 | CGM.getARCEntrypoints().objc_loadWeakRetained, |
| 2180 | "objc_loadWeakRetained"); |
| 2181 | } |
| 2182 | |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2183 | /// i8* \@objc_storeWeak(i8** %addr, i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2184 | /// Returns %value. |
| 2185 | llvm::Value *CodeGenFunction::EmitARCStoreWeak(llvm::Value *addr, |
| 2186 | llvm::Value *value, |
| 2187 | bool ignored) { |
| 2188 | return emitARCStoreOperation(*this, addr, value, |
| 2189 | CGM.getARCEntrypoints().objc_storeWeak, |
| 2190 | "objc_storeWeak", ignored); |
| 2191 | } |
| 2192 | |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2193 | /// i8* \@objc_initWeak(i8** %addr, i8* %value) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2194 | /// Returns %value. %addr is known to not have a current weak entry. |
| 2195 | /// Essentially equivalent to: |
| 2196 | /// *addr = nil; objc_storeWeak(addr, value); |
| 2197 | void CodeGenFunction::EmitARCInitWeak(llvm::Value *addr, llvm::Value *value) { |
| 2198 | // If we're initializing to null, just write null to memory; no need |
| 2199 | // to get the runtime involved. But don't do this if optimization |
| 2200 | // is enabled, because accounting for this would make the optimizer |
| 2201 | // much more complicated. |
| 2202 | if (isa<llvm::ConstantPointerNull>(value) && |
| 2203 | CGM.getCodeGenOpts().OptimizationLevel == 0) { |
| 2204 | Builder.CreateStore(value, addr); |
| 2205 | return; |
| 2206 | } |
| 2207 | |
| 2208 | emitARCStoreOperation(*this, addr, value, |
| 2209 | CGM.getARCEntrypoints().objc_initWeak, |
| 2210 | "objc_initWeak", /*ignored*/ true); |
| 2211 | } |
| 2212 | |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2213 | /// void \@objc_destroyWeak(i8** %addr) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2214 | /// Essentially objc_storeWeak(addr, nil). |
| 2215 | void CodeGenFunction::EmitARCDestroyWeak(llvm::Value *addr) { |
| 2216 | llvm::Constant *&fn = CGM.getARCEntrypoints().objc_destroyWeak; |
| 2217 | if (!fn) { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2218 | llvm::FunctionType *fnType = |
Benjamin Kramer | 76ecdfc | 2013-03-07 21:18:31 +0000 | [diff] [blame] | 2219 | llvm::FunctionType::get(Builder.getVoidTy(), Int8PtrPtrTy, false); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2220 | fn = createARCRuntimeFunction(CGM, fnType, "objc_destroyWeak"); |
| 2221 | } |
| 2222 | |
| 2223 | // Cast the argument to 'id*'. |
| 2224 | addr = Builder.CreateBitCast(addr, Int8PtrPtrTy); |
| 2225 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2226 | EmitNounwindRuntimeCall(fn, addr); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2227 | } |
| 2228 | |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2229 | /// void \@objc_moveWeak(i8** %dest, i8** %src) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2230 | /// Disregards the current value in %dest. Leaves %src pointing to nothing. |
| 2231 | /// Essentially (objc_copyWeak(dest, src), objc_destroyWeak(src)). |
| 2232 | void CodeGenFunction::EmitARCMoveWeak(llvm::Value *dst, llvm::Value *src) { |
| 2233 | emitARCCopyOperation(*this, dst, src, |
| 2234 | CGM.getARCEntrypoints().objc_moveWeak, |
| 2235 | "objc_moveWeak"); |
| 2236 | } |
| 2237 | |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2238 | /// void \@objc_copyWeak(i8** %dest, i8** %src) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2239 | /// Disregards the current value in %dest. Essentially |
| 2240 | /// objc_release(objc_initWeak(dest, objc_readWeakRetained(src))) |
| 2241 | void CodeGenFunction::EmitARCCopyWeak(llvm::Value *dst, llvm::Value *src) { |
| 2242 | emitARCCopyOperation(*this, dst, src, |
| 2243 | CGM.getARCEntrypoints().objc_copyWeak, |
| 2244 | "objc_copyWeak"); |
| 2245 | } |
| 2246 | |
| 2247 | /// Produce the code to do a objc_autoreleasepool_push. |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2248 | /// call i8* \@objc_autoreleasePoolPush(void) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2249 | llvm::Value *CodeGenFunction::EmitObjCAutoreleasePoolPush() { |
| 2250 | llvm::Constant *&fn = CGM.getRREntrypoints().objc_autoreleasePoolPush; |
| 2251 | if (!fn) { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2252 | llvm::FunctionType *fnType = |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2253 | llvm::FunctionType::get(Int8PtrTy, false); |
| 2254 | fn = createARCRuntimeFunction(CGM, fnType, "objc_autoreleasePoolPush"); |
| 2255 | } |
| 2256 | |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2257 | return EmitNounwindRuntimeCall(fn); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2258 | } |
| 2259 | |
| 2260 | /// Produce the code to do a primitive release. |
James Dennett | 9d96e9c | 2012-06-22 05:41:30 +0000 | [diff] [blame] | 2261 | /// call void \@objc_autoreleasePoolPop(i8* %ptr) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2262 | void CodeGenFunction::EmitObjCAutoreleasePoolPop(llvm::Value *value) { |
| 2263 | assert(value->getType() == Int8PtrTy); |
| 2264 | |
| 2265 | llvm::Constant *&fn = CGM.getRREntrypoints().objc_autoreleasePoolPop; |
| 2266 | if (!fn) { |
Chris Lattner | 2acc6e3 | 2011-07-18 04:24:23 +0000 | [diff] [blame] | 2267 | llvm::FunctionType *fnType = |
Benjamin Kramer | 76ecdfc | 2013-03-07 21:18:31 +0000 | [diff] [blame] | 2268 | llvm::FunctionType::get(Builder.getVoidTy(), Int8PtrTy, false); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2269 | |
| 2270 | // We don't want to use a weak import here; instead we should not |
| 2271 | // fall into this path. |
| 2272 | fn = createARCRuntimeFunction(CGM, fnType, "objc_autoreleasePoolPop"); |
| 2273 | } |
| 2274 | |
John McCall | b57f6b3 | 2013-04-16 21:29:40 +0000 | [diff] [blame] | 2275 | // objc_autoreleasePoolPop can throw. |
| 2276 | EmitRuntimeCallOrInvoke(fn, value); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2277 | } |
| 2278 | |
| 2279 | /// Produce the code to do an MRR version objc_autoreleasepool_push. |
| 2280 | /// Which is: [[NSAutoreleasePool alloc] init]; |
| 2281 | /// Where alloc is declared as: + (id) alloc; in NSAutoreleasePool class. |
| 2282 | /// init is declared as: - (id) init; in its NSObject super class. |
| 2283 | /// |
| 2284 | llvm::Value *CodeGenFunction::EmitObjCMRRAutoreleasePoolPush() { |
| 2285 | CGObjCRuntime &Runtime = CGM.getObjCRuntime(); |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2286 | llvm::Value *Receiver = Runtime.EmitNSAutoreleasePoolClassRef(*this); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2287 | // [NSAutoreleasePool alloc] |
| 2288 | IdentifierInfo *II = &CGM.getContext().Idents.get("alloc"); |
| 2289 | Selector AllocSel = getContext().Selectors.getSelector(0, &II); |
| 2290 | CallArgList Args; |
| 2291 | RValue AllocRV = |
| 2292 | Runtime.GenerateMessageSend(*this, ReturnValueSlot(), |
| 2293 | getContext().getObjCIdType(), |
| 2294 | AllocSel, Receiver, Args); |
| 2295 | |
| 2296 | // [Receiver init] |
| 2297 | Receiver = AllocRV.getScalarVal(); |
| 2298 | II = &CGM.getContext().Idents.get("init"); |
| 2299 | Selector InitSel = getContext().Selectors.getSelector(0, &II); |
| 2300 | RValue InitRV = |
| 2301 | Runtime.GenerateMessageSend(*this, ReturnValueSlot(), |
| 2302 | getContext().getObjCIdType(), |
| 2303 | InitSel, Receiver, Args); |
| 2304 | return InitRV.getScalarVal(); |
| 2305 | } |
| 2306 | |
| 2307 | /// Produce the code to do a primitive release. |
| 2308 | /// [tmp drain]; |
| 2309 | void CodeGenFunction::EmitObjCMRRAutoreleasePoolPop(llvm::Value *Arg) { |
| 2310 | IdentifierInfo *II = &CGM.getContext().Idents.get("drain"); |
| 2311 | Selector DrainSel = getContext().Selectors.getSelector(0, &II); |
| 2312 | CallArgList Args; |
| 2313 | CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), |
| 2314 | getContext().VoidTy, DrainSel, Arg, Args); |
| 2315 | } |
| 2316 | |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 2317 | void CodeGenFunction::destroyARCStrongPrecise(CodeGenFunction &CGF, |
| 2318 | llvm::Value *addr, |
| 2319 | QualType type) { |
John McCall | 5b07e80 | 2013-03-13 03:10:54 +0000 | [diff] [blame] | 2320 | CGF.EmitARCDestroyStrong(addr, ARCPreciseLifetime); |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 2321 | } |
| 2322 | |
| 2323 | void CodeGenFunction::destroyARCStrongImprecise(CodeGenFunction &CGF, |
| 2324 | llvm::Value *addr, |
| 2325 | QualType type) { |
John McCall | 5b07e80 | 2013-03-13 03:10:54 +0000 | [diff] [blame] | 2326 | CGF.EmitARCDestroyStrong(addr, ARCImpreciseLifetime); |
John McCall | bdc4d80 | 2011-07-09 01:37:26 +0000 | [diff] [blame] | 2327 | } |
| 2328 | |
| 2329 | void CodeGenFunction::destroyARCWeak(CodeGenFunction &CGF, |
| 2330 | llvm::Value *addr, |
| 2331 | QualType type) { |
| 2332 | CGF.EmitARCDestroyWeak(addr); |
| 2333 | } |
| 2334 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2335 | namespace { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2336 | struct CallObjCAutoreleasePoolObject : EHScopeStack::Cleanup { |
| 2337 | llvm::Value *Token; |
| 2338 | |
| 2339 | CallObjCAutoreleasePoolObject(llvm::Value *token) : Token(token) {} |
| 2340 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2341 | void Emit(CodeGenFunction &CGF, Flags flags) override { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2342 | CGF.EmitObjCAutoreleasePoolPop(Token); |
| 2343 | } |
| 2344 | }; |
| 2345 | struct CallObjCMRRAutoreleasePoolObject : EHScopeStack::Cleanup { |
| 2346 | llvm::Value *Token; |
| 2347 | |
| 2348 | CallObjCMRRAutoreleasePoolObject(llvm::Value *token) : Token(token) {} |
| 2349 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2350 | void Emit(CodeGenFunction &CGF, Flags flags) override { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2351 | CGF.EmitObjCMRRAutoreleasePoolPop(Token); |
| 2352 | } |
| 2353 | }; |
| 2354 | } |
| 2355 | |
| 2356 | void CodeGenFunction::EmitObjCAutoreleasePoolCleanup(llvm::Value *Ptr) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2357 | if (CGM.getLangOpts().ObjCAutoRefCount) |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2358 | EHStack.pushCleanup<CallObjCAutoreleasePoolObject>(NormalCleanup, Ptr); |
| 2359 | else |
| 2360 | EHStack.pushCleanup<CallObjCMRRAutoreleasePoolObject>(NormalCleanup, Ptr); |
| 2361 | } |
| 2362 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2363 | static TryEmitResult tryEmitARCRetainLoadOfScalar(CodeGenFunction &CGF, |
| 2364 | LValue lvalue, |
| 2365 | QualType type) { |
| 2366 | switch (type.getObjCLifetime()) { |
| 2367 | case Qualifiers::OCL_None: |
| 2368 | case Qualifiers::OCL_ExplicitNone: |
| 2369 | case Qualifiers::OCL_Strong: |
| 2370 | case Qualifiers::OCL_Autoreleasing: |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2371 | return TryEmitResult(CGF.EmitLoadOfLValue(lvalue, |
| 2372 | SourceLocation()).getScalarVal(), |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2373 | false); |
| 2374 | |
| 2375 | case Qualifiers::OCL_Weak: |
| 2376 | return TryEmitResult(CGF.EmitARCLoadWeakRetained(lvalue.getAddress()), |
| 2377 | true); |
| 2378 | } |
| 2379 | |
| 2380 | llvm_unreachable("impossible lifetime!"); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2381 | } |
| 2382 | |
| 2383 | static TryEmitResult tryEmitARCRetainLoadOfScalar(CodeGenFunction &CGF, |
| 2384 | const Expr *e) { |
| 2385 | e = e->IgnoreParens(); |
| 2386 | QualType type = e->getType(); |
| 2387 | |
John McCall | 2148011 | 2011-08-30 00:57:29 +0000 | [diff] [blame] | 2388 | // If we're loading retained from a __strong xvalue, we can avoid |
| 2389 | // an extra retain/release pair by zeroing out the source of this |
| 2390 | // "move" operation. |
| 2391 | if (e->isXValue() && |
| 2392 | !type.isConstQualified() && |
| 2393 | type.getObjCLifetime() == Qualifiers::OCL_Strong) { |
| 2394 | // Emit the lvalue. |
| 2395 | LValue lv = CGF.EmitLValue(e); |
| 2396 | |
| 2397 | // Load the object pointer. |
Nick Lewycky | 4ee7dc2 | 2013-10-02 02:29:49 +0000 | [diff] [blame] | 2398 | llvm::Value *result = CGF.EmitLoadOfLValue(lv, |
| 2399 | SourceLocation()).getScalarVal(); |
John McCall | 2148011 | 2011-08-30 00:57:29 +0000 | [diff] [blame] | 2400 | |
| 2401 | // Set the source pointer to NULL. |
| 2402 | CGF.EmitStoreOfScalar(getNullForVariable(lv.getAddress()), lv); |
| 2403 | |
| 2404 | return TryEmitResult(result, true); |
| 2405 | } |
| 2406 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2407 | // As a very special optimization, in ARC++, if the l-value is the |
| 2408 | // result of a non-volatile assignment, do a simple retain of the |
| 2409 | // result of the call to objc_storeWeak instead of reloading. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2410 | if (CGF.getLangOpts().CPlusPlus && |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2411 | !type.isVolatileQualified() && |
| 2412 | type.getObjCLifetime() == Qualifiers::OCL_Weak && |
| 2413 | isa<BinaryOperator>(e) && |
| 2414 | cast<BinaryOperator>(e)->getOpcode() == BO_Assign) |
| 2415 | return TryEmitResult(CGF.EmitScalarExpr(e), false); |
| 2416 | |
| 2417 | return tryEmitARCRetainLoadOfScalar(CGF, CGF.EmitLValue(e), type); |
| 2418 | } |
| 2419 | |
| 2420 | static llvm::Value *emitARCRetainAfterCall(CodeGenFunction &CGF, |
| 2421 | llvm::Value *value); |
| 2422 | |
| 2423 | /// Given that the given expression is some sort of call (which does |
| 2424 | /// not return retained), emit a retain following it. |
| 2425 | static llvm::Value *emitARCRetainCall(CodeGenFunction &CGF, const Expr *e) { |
| 2426 | llvm::Value *value = CGF.EmitScalarExpr(e); |
| 2427 | return emitARCRetainAfterCall(CGF, value); |
| 2428 | } |
| 2429 | |
| 2430 | static llvm::Value *emitARCRetainAfterCall(CodeGenFunction &CGF, |
| 2431 | llvm::Value *value) { |
| 2432 | if (llvm::CallInst *call = dyn_cast<llvm::CallInst>(value)) { |
| 2433 | CGBuilderTy::InsertPoint ip = CGF.Builder.saveIP(); |
| 2434 | |
| 2435 | // Place the retain immediately following the call. |
| 2436 | CGF.Builder.SetInsertPoint(call->getParent(), |
| 2437 | ++llvm::BasicBlock::iterator(call)); |
| 2438 | value = CGF.EmitARCRetainAutoreleasedReturnValue(value); |
| 2439 | |
| 2440 | CGF.Builder.restoreIP(ip); |
| 2441 | return value; |
| 2442 | } else if (llvm::InvokeInst *invoke = dyn_cast<llvm::InvokeInst>(value)) { |
| 2443 | CGBuilderTy::InsertPoint ip = CGF.Builder.saveIP(); |
| 2444 | |
| 2445 | // Place the retain at the beginning of the normal destination block. |
| 2446 | llvm::BasicBlock *BB = invoke->getNormalDest(); |
| 2447 | CGF.Builder.SetInsertPoint(BB, BB->begin()); |
| 2448 | value = CGF.EmitARCRetainAutoreleasedReturnValue(value); |
| 2449 | |
| 2450 | CGF.Builder.restoreIP(ip); |
| 2451 | return value; |
| 2452 | |
| 2453 | // Bitcasts can arise because of related-result returns. Rewrite |
| 2454 | // the operand. |
| 2455 | } else if (llvm::BitCastInst *bitcast = dyn_cast<llvm::BitCastInst>(value)) { |
| 2456 | llvm::Value *operand = bitcast->getOperand(0); |
| 2457 | operand = emitARCRetainAfterCall(CGF, operand); |
| 2458 | bitcast->setOperand(0, operand); |
| 2459 | return bitcast; |
| 2460 | |
| 2461 | // Generic fall-back case. |
| 2462 | } else { |
| 2463 | // Retain using the non-block variant: we never need to do a copy |
| 2464 | // of a block that's been returned to us. |
| 2465 | return CGF.EmitARCRetainNonBlock(value); |
| 2466 | } |
| 2467 | } |
| 2468 | |
John McCall | dc05b11 | 2011-09-10 01:16:55 +0000 | [diff] [blame] | 2469 | /// Determine whether it might be important to emit a separate |
| 2470 | /// objc_retain_block on the result of the given expression, or |
| 2471 | /// whether it's okay to just emit it in a +1 context. |
| 2472 | static bool shouldEmitSeparateBlockRetain(const Expr *e) { |
| 2473 | assert(e->getType()->isBlockPointerType()); |
| 2474 | e = e->IgnoreParens(); |
| 2475 | |
| 2476 | // For future goodness, emit block expressions directly in +1 |
| 2477 | // contexts if we can. |
| 2478 | if (isa<BlockExpr>(e)) |
| 2479 | return false; |
| 2480 | |
| 2481 | if (const CastExpr *cast = dyn_cast<CastExpr>(e)) { |
| 2482 | switch (cast->getCastKind()) { |
| 2483 | // Emitting these operations in +1 contexts is goodness. |
| 2484 | case CK_LValueToRValue: |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 2485 | case CK_ARCReclaimReturnedObject: |
| 2486 | case CK_ARCConsumeObject: |
| 2487 | case CK_ARCProduceObject: |
John McCall | dc05b11 | 2011-09-10 01:16:55 +0000 | [diff] [blame] | 2488 | return false; |
| 2489 | |
| 2490 | // These operations preserve a block type. |
| 2491 | case CK_NoOp: |
| 2492 | case CK_BitCast: |
| 2493 | return shouldEmitSeparateBlockRetain(cast->getSubExpr()); |
| 2494 | |
| 2495 | // These operations are known to be bad (or haven't been considered). |
| 2496 | case CK_AnyPointerToBlockPointerCast: |
| 2497 | default: |
| 2498 | return true; |
| 2499 | } |
| 2500 | } |
| 2501 | |
| 2502 | return true; |
| 2503 | } |
| 2504 | |
John McCall | 4b9c2d2 | 2011-11-06 09:01:30 +0000 | [diff] [blame] | 2505 | /// Try to emit a PseudoObjectExpr at +1. |
| 2506 | /// |
| 2507 | /// This massively duplicates emitPseudoObjectRValue. |
| 2508 | static TryEmitResult tryEmitARCRetainPseudoObject(CodeGenFunction &CGF, |
| 2509 | const PseudoObjectExpr *E) { |
Dmitri Gribenko | cfa88f8 | 2013-01-12 19:30:44 +0000 | [diff] [blame] | 2510 | SmallVector<CodeGenFunction::OpaqueValueMappingData, 4> opaques; |
John McCall | 4b9c2d2 | 2011-11-06 09:01:30 +0000 | [diff] [blame] | 2511 | |
| 2512 | // Find the result expression. |
| 2513 | const Expr *resultExpr = E->getResultExpr(); |
| 2514 | assert(resultExpr); |
| 2515 | TryEmitResult result; |
| 2516 | |
| 2517 | for (PseudoObjectExpr::const_semantics_iterator |
| 2518 | i = E->semantics_begin(), e = E->semantics_end(); i != e; ++i) { |
| 2519 | const Expr *semantic = *i; |
| 2520 | |
| 2521 | // If this semantic expression is an opaque value, bind it |
| 2522 | // to the result of its source expression. |
| 2523 | if (const OpaqueValueExpr *ov = dyn_cast<OpaqueValueExpr>(semantic)) { |
| 2524 | typedef CodeGenFunction::OpaqueValueMappingData OVMA; |
| 2525 | OVMA opaqueData; |
| 2526 | |
| 2527 | // If this semantic is the result of the pseudo-object |
| 2528 | // expression, try to evaluate the source as +1. |
| 2529 | if (ov == resultExpr) { |
| 2530 | assert(!OVMA::shouldBindAsLValue(ov)); |
| 2531 | result = tryEmitARCRetainScalarExpr(CGF, ov->getSourceExpr()); |
| 2532 | opaqueData = OVMA::bind(CGF, ov, RValue::get(result.getPointer())); |
| 2533 | |
| 2534 | // Otherwise, just bind it. |
| 2535 | } else { |
| 2536 | opaqueData = OVMA::bind(CGF, ov, ov->getSourceExpr()); |
| 2537 | } |
| 2538 | opaques.push_back(opaqueData); |
| 2539 | |
| 2540 | // Otherwise, if the expression is the result, evaluate it |
| 2541 | // and remember the result. |
| 2542 | } else if (semantic == resultExpr) { |
| 2543 | result = tryEmitARCRetainScalarExpr(CGF, semantic); |
| 2544 | |
| 2545 | // Otherwise, evaluate the expression in an ignored context. |
| 2546 | } else { |
| 2547 | CGF.EmitIgnoredExpr(semantic); |
| 2548 | } |
| 2549 | } |
| 2550 | |
| 2551 | // Unbind all the opaques now. |
| 2552 | for (unsigned i = 0, e = opaques.size(); i != e; ++i) |
| 2553 | opaques[i].unbind(CGF); |
| 2554 | |
| 2555 | return result; |
| 2556 | } |
| 2557 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2558 | static TryEmitResult |
| 2559 | tryEmitARCRetainScalarExpr(CodeGenFunction &CGF, const Expr *e) { |
John McCall | 72dcecc | 2013-02-12 00:25:08 +0000 | [diff] [blame] | 2560 | // We should *never* see a nested full-expression here, because if |
| 2561 | // we fail to emit at +1, our caller must not retain after we close |
| 2562 | // out the full-expression. |
| 2563 | assert(!isa<ExprWithCleanups>(e)); |
John McCall | 990567c | 2011-07-27 01:07:15 +0000 | [diff] [blame] | 2564 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2565 | // The desired result type, if it differs from the type of the |
| 2566 | // ultimate opaque expression. |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2567 | llvm::Type *resultType = nullptr; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2568 | |
| 2569 | while (true) { |
| 2570 | e = e->IgnoreParens(); |
| 2571 | |
| 2572 | // There's a break at the end of this if-chain; anything |
| 2573 | // that wants to keep looping has to explicitly continue. |
| 2574 | if (const CastExpr *ce = dyn_cast<CastExpr>(e)) { |
| 2575 | switch (ce->getCastKind()) { |
| 2576 | // No-op casts don't change the type, so we just ignore them. |
| 2577 | case CK_NoOp: |
| 2578 | e = ce->getSubExpr(); |
| 2579 | continue; |
| 2580 | |
| 2581 | case CK_LValueToRValue: { |
| 2582 | TryEmitResult loadResult |
| 2583 | = tryEmitARCRetainLoadOfScalar(CGF, ce->getSubExpr()); |
| 2584 | if (resultType) { |
| 2585 | llvm::Value *value = loadResult.getPointer(); |
| 2586 | value = CGF.Builder.CreateBitCast(value, resultType); |
| 2587 | loadResult.setPointer(value); |
| 2588 | } |
| 2589 | return loadResult; |
| 2590 | } |
| 2591 | |
| 2592 | // These casts can change the type, so remember that and |
| 2593 | // soldier on. We only need to remember the outermost such |
| 2594 | // cast, though. |
John McCall | 1d9b3b2 | 2011-09-09 05:25:32 +0000 | [diff] [blame] | 2595 | case CK_CPointerToObjCPointerCast: |
| 2596 | case CK_BlockPointerToObjCPointerCast: |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2597 | case CK_AnyPointerToBlockPointerCast: |
| 2598 | case CK_BitCast: |
| 2599 | if (!resultType) |
| 2600 | resultType = CGF.ConvertType(ce->getType()); |
| 2601 | e = ce->getSubExpr(); |
| 2602 | assert(e->getType()->hasPointerRepresentation()); |
| 2603 | continue; |
| 2604 | |
| 2605 | // For consumptions, just emit the subexpression and thus elide |
| 2606 | // the retain/release pair. |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 2607 | case CK_ARCConsumeObject: { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2608 | llvm::Value *result = CGF.EmitScalarExpr(ce->getSubExpr()); |
| 2609 | if (resultType) result = CGF.Builder.CreateBitCast(result, resultType); |
| 2610 | return TryEmitResult(result, true); |
| 2611 | } |
| 2612 | |
John McCall | dc05b11 | 2011-09-10 01:16:55 +0000 | [diff] [blame] | 2613 | // Block extends are net +0. Naively, we could just recurse on |
| 2614 | // the subexpression, but actually we need to ensure that the |
| 2615 | // value is copied as a block, so there's a little filter here. |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 2616 | case CK_ARCExtendBlockObject: { |
John McCall | dc05b11 | 2011-09-10 01:16:55 +0000 | [diff] [blame] | 2617 | llvm::Value *result; // will be a +0 value |
| 2618 | |
| 2619 | // If we can't safely assume the sub-expression will produce a |
| 2620 | // block-copied value, emit the sub-expression at +0. |
| 2621 | if (shouldEmitSeparateBlockRetain(ce->getSubExpr())) { |
| 2622 | result = CGF.EmitScalarExpr(ce->getSubExpr()); |
| 2623 | |
| 2624 | // Otherwise, try to emit the sub-expression at +1 recursively. |
| 2625 | } else { |
| 2626 | TryEmitResult subresult |
| 2627 | = tryEmitARCRetainScalarExpr(CGF, ce->getSubExpr()); |
| 2628 | result = subresult.getPointer(); |
| 2629 | |
| 2630 | // If that produced a retained value, just use that, |
| 2631 | // possibly casting down. |
| 2632 | if (subresult.getInt()) { |
| 2633 | if (resultType) |
| 2634 | result = CGF.Builder.CreateBitCast(result, resultType); |
| 2635 | return TryEmitResult(result, true); |
| 2636 | } |
| 2637 | |
| 2638 | // Otherwise it's +0. |
| 2639 | } |
| 2640 | |
| 2641 | // Retain the object as a block, then cast down. |
John McCall | 348f16f | 2011-10-04 06:23:45 +0000 | [diff] [blame] | 2642 | result = CGF.EmitARCRetainBlock(result, /*mandatory*/ true); |
John McCall | dc05b11 | 2011-09-10 01:16:55 +0000 | [diff] [blame] | 2643 | if (resultType) result = CGF.Builder.CreateBitCast(result, resultType); |
| 2644 | return TryEmitResult(result, true); |
| 2645 | } |
| 2646 | |
John McCall | 7e5e5f4 | 2011-07-07 06:58:02 +0000 | [diff] [blame] | 2647 | // For reclaims, emit the subexpression as a retained call and |
| 2648 | // skip the consumption. |
John McCall | 33e56f3 | 2011-09-10 06:18:15 +0000 | [diff] [blame] | 2649 | case CK_ARCReclaimReturnedObject: { |
John McCall | 7e5e5f4 | 2011-07-07 06:58:02 +0000 | [diff] [blame] | 2650 | llvm::Value *result = emitARCRetainCall(CGF, ce->getSubExpr()); |
| 2651 | if (resultType) result = CGF.Builder.CreateBitCast(result, resultType); |
| 2652 | return TryEmitResult(result, true); |
| 2653 | } |
| 2654 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2655 | default: |
| 2656 | break; |
| 2657 | } |
| 2658 | |
| 2659 | // Skip __extension__. |
| 2660 | } else if (const UnaryOperator *op = dyn_cast<UnaryOperator>(e)) { |
| 2661 | if (op->getOpcode() == UO_Extension) { |
| 2662 | e = op->getSubExpr(); |
| 2663 | continue; |
| 2664 | } |
| 2665 | |
| 2666 | // For calls and message sends, use the retained-call logic. |
| 2667 | // Delegate inits are a special case in that they're the only |
| 2668 | // returns-retained expression that *isn't* surrounded by |
| 2669 | // a consume. |
| 2670 | } else if (isa<CallExpr>(e) || |
| 2671 | (isa<ObjCMessageExpr>(e) && |
| 2672 | !cast<ObjCMessageExpr>(e)->isDelegateInitCall())) { |
| 2673 | llvm::Value *result = emitARCRetainCall(CGF, e); |
| 2674 | if (resultType) result = CGF.Builder.CreateBitCast(result, resultType); |
| 2675 | return TryEmitResult(result, true); |
John McCall | 4b9c2d2 | 2011-11-06 09:01:30 +0000 | [diff] [blame] | 2676 | |
| 2677 | // Look through pseudo-object expressions. |
| 2678 | } else if (const PseudoObjectExpr *pseudo = dyn_cast<PseudoObjectExpr>(e)) { |
| 2679 | TryEmitResult result |
| 2680 | = tryEmitARCRetainPseudoObject(CGF, pseudo); |
| 2681 | if (resultType) { |
| 2682 | llvm::Value *value = result.getPointer(); |
| 2683 | value = CGF.Builder.CreateBitCast(value, resultType); |
| 2684 | result.setPointer(value); |
| 2685 | } |
| 2686 | return result; |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2687 | } |
| 2688 | |
| 2689 | // Conservatively halt the search at any other expression kind. |
| 2690 | break; |
| 2691 | } |
| 2692 | |
| 2693 | // We didn't find an obvious production, so emit what we've got and |
| 2694 | // tell the caller that we didn't manage to retain. |
| 2695 | llvm::Value *result = CGF.EmitScalarExpr(e); |
| 2696 | if (resultType) result = CGF.Builder.CreateBitCast(result, resultType); |
| 2697 | return TryEmitResult(result, false); |
| 2698 | } |
| 2699 | |
| 2700 | static llvm::Value *emitARCRetainLoadOfScalar(CodeGenFunction &CGF, |
| 2701 | LValue lvalue, |
| 2702 | QualType type) { |
| 2703 | TryEmitResult result = tryEmitARCRetainLoadOfScalar(CGF, lvalue, type); |
| 2704 | llvm::Value *value = result.getPointer(); |
| 2705 | if (!result.getInt()) |
| 2706 | value = CGF.EmitARCRetain(type, value); |
| 2707 | return value; |
| 2708 | } |
| 2709 | |
| 2710 | /// EmitARCRetainScalarExpr - Semantically equivalent to |
| 2711 | /// EmitARCRetainObject(e->getType(), EmitScalarExpr(e)), but making a |
| 2712 | /// best-effort attempt to peephole expressions that naturally produce |
| 2713 | /// retained objects. |
| 2714 | llvm::Value *CodeGenFunction::EmitARCRetainScalarExpr(const Expr *e) { |
John McCall | 72dcecc | 2013-02-12 00:25:08 +0000 | [diff] [blame] | 2715 | // The retain needs to happen within the full-expression. |
| 2716 | if (const ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(e)) { |
| 2717 | enterFullExpression(cleanups); |
| 2718 | RunCleanupsScope scope(*this); |
| 2719 | return EmitARCRetainScalarExpr(cleanups->getSubExpr()); |
| 2720 | } |
| 2721 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2722 | TryEmitResult result = tryEmitARCRetainScalarExpr(*this, e); |
| 2723 | llvm::Value *value = result.getPointer(); |
| 2724 | if (!result.getInt()) |
| 2725 | value = EmitARCRetain(e->getType(), value); |
| 2726 | return value; |
| 2727 | } |
| 2728 | |
| 2729 | llvm::Value * |
| 2730 | CodeGenFunction::EmitARCRetainAutoreleaseScalarExpr(const Expr *e) { |
John McCall | 72dcecc | 2013-02-12 00:25:08 +0000 | [diff] [blame] | 2731 | // The retain needs to happen within the full-expression. |
| 2732 | if (const ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(e)) { |
| 2733 | enterFullExpression(cleanups); |
| 2734 | RunCleanupsScope scope(*this); |
| 2735 | return EmitARCRetainAutoreleaseScalarExpr(cleanups->getSubExpr()); |
| 2736 | } |
| 2737 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2738 | TryEmitResult result = tryEmitARCRetainScalarExpr(*this, e); |
| 2739 | llvm::Value *value = result.getPointer(); |
| 2740 | if (result.getInt()) |
| 2741 | value = EmitARCAutorelease(value); |
| 2742 | else |
| 2743 | value = EmitARCRetainAutorelease(e->getType(), value); |
| 2744 | return value; |
| 2745 | } |
| 2746 | |
John McCall | 348f16f | 2011-10-04 06:23:45 +0000 | [diff] [blame] | 2747 | llvm::Value *CodeGenFunction::EmitARCExtendBlockObject(const Expr *e) { |
| 2748 | llvm::Value *result; |
| 2749 | bool doRetain; |
| 2750 | |
| 2751 | if (shouldEmitSeparateBlockRetain(e)) { |
| 2752 | result = EmitScalarExpr(e); |
| 2753 | doRetain = true; |
| 2754 | } else { |
| 2755 | TryEmitResult subresult = tryEmitARCRetainScalarExpr(*this, e); |
| 2756 | result = subresult.getPointer(); |
| 2757 | doRetain = !subresult.getInt(); |
| 2758 | } |
| 2759 | |
| 2760 | if (doRetain) |
| 2761 | result = EmitARCRetainBlock(result, /*mandatory*/ true); |
| 2762 | return EmitObjCConsumeObject(e->getType(), result); |
| 2763 | } |
| 2764 | |
John McCall | 2b014d6 | 2011-10-01 10:32:24 +0000 | [diff] [blame] | 2765 | llvm::Value *CodeGenFunction::EmitObjCThrowOperand(const Expr *expr) { |
| 2766 | // In ARC, retain and autorelease the expression. |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 2767 | if (getLangOpts().ObjCAutoRefCount) { |
John McCall | 2b014d6 | 2011-10-01 10:32:24 +0000 | [diff] [blame] | 2768 | // Do so before running any cleanups for the full-expression. |
John McCall | 72dcecc | 2013-02-12 00:25:08 +0000 | [diff] [blame] | 2769 | // EmitARCRetainAutoreleaseScalarExpr does this for us. |
John McCall | 2b014d6 | 2011-10-01 10:32:24 +0000 | [diff] [blame] | 2770 | return EmitARCRetainAutoreleaseScalarExpr(expr); |
| 2771 | } |
| 2772 | |
| 2773 | // Otherwise, use the normal scalar-expression emission. The |
| 2774 | // exception machinery doesn't do anything special with the |
| 2775 | // exception like retaining it, so there's no safety associated with |
| 2776 | // only running cleanups after the throw has started, and when it |
| 2777 | // matters it tends to be substantially inferior code. |
| 2778 | return EmitScalarExpr(expr); |
| 2779 | } |
| 2780 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2781 | std::pair<LValue,llvm::Value*> |
| 2782 | CodeGenFunction::EmitARCStoreStrong(const BinaryOperator *e, |
| 2783 | bool ignored) { |
| 2784 | // Evaluate the RHS first. |
| 2785 | TryEmitResult result = tryEmitARCRetainScalarExpr(*this, e->getRHS()); |
| 2786 | llvm::Value *value = result.getPointer(); |
| 2787 | |
John McCall | fb72081 | 2011-07-28 07:23:35 +0000 | [diff] [blame] | 2788 | bool hasImmediateRetain = result.getInt(); |
| 2789 | |
| 2790 | // If we didn't emit a retained object, and the l-value is of block |
| 2791 | // type, then we need to emit the block-retain immediately in case |
| 2792 | // it invalidates the l-value. |
| 2793 | if (!hasImmediateRetain && e->getType()->isBlockPointerType()) { |
John McCall | 348f16f | 2011-10-04 06:23:45 +0000 | [diff] [blame] | 2794 | value = EmitARCRetainBlock(value, /*mandatory*/ false); |
John McCall | fb72081 | 2011-07-28 07:23:35 +0000 | [diff] [blame] | 2795 | hasImmediateRetain = true; |
| 2796 | } |
| 2797 | |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2798 | LValue lvalue = EmitLValue(e->getLHS()); |
| 2799 | |
| 2800 | // If the RHS was emitted retained, expand this. |
John McCall | fb72081 | 2011-07-28 07:23:35 +0000 | [diff] [blame] | 2801 | if (hasImmediateRetain) { |
Nick Lewycky | c53143c | 2013-10-02 02:33:11 +0000 | [diff] [blame] | 2802 | llvm::Value *oldValue = EmitLoadOfScalar(lvalue, SourceLocation()); |
Eli Friedman | 6da2c71 | 2011-12-03 04:14:32 +0000 | [diff] [blame] | 2803 | EmitStoreOfScalar(value, lvalue); |
John McCall | 5b07e80 | 2013-03-13 03:10:54 +0000 | [diff] [blame] | 2804 | EmitARCRelease(oldValue, lvalue.isARCPreciseLifetime()); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2805 | } else { |
John McCall | 545d996 | 2011-06-25 02:11:03 +0000 | [diff] [blame] | 2806 | value = EmitARCStoreStrong(lvalue, value, ignored); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2807 | } |
| 2808 | |
| 2809 | return std::pair<LValue,llvm::Value*>(lvalue, value); |
| 2810 | } |
| 2811 | |
| 2812 | std::pair<LValue,llvm::Value*> |
| 2813 | CodeGenFunction::EmitARCStoreAutoreleasing(const BinaryOperator *e) { |
| 2814 | llvm::Value *value = EmitARCRetainAutoreleaseScalarExpr(e->getRHS()); |
| 2815 | LValue lvalue = EmitLValue(e->getLHS()); |
| 2816 | |
Eli Friedman | 6da2c71 | 2011-12-03 04:14:32 +0000 | [diff] [blame] | 2817 | EmitStoreOfScalar(value, lvalue); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2818 | |
| 2819 | return std::pair<LValue,llvm::Value*>(lvalue, value); |
| 2820 | } |
| 2821 | |
| 2822 | void CodeGenFunction::EmitObjCAutoreleasePoolStmt( |
Eric Christopher | 16098f3 | 2012-03-29 17:31:31 +0000 | [diff] [blame] | 2823 | const ObjCAutoreleasePoolStmt &ARPS) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2824 | const Stmt *subStmt = ARPS.getSubStmt(); |
| 2825 | const CompoundStmt &S = cast<CompoundStmt>(*subStmt); |
| 2826 | |
| 2827 | CGDebugInfo *DI = getDebugInfo(); |
Eric Christopher | 73fb350 | 2011-10-13 21:45:18 +0000 | [diff] [blame] | 2828 | if (DI) |
| 2829 | DI->EmitLexicalBlockStart(Builder, S.getLBracLoc()); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2830 | |
| 2831 | // Keep track of the current cleanup stack depth. |
| 2832 | RunCleanupsScope Scope(*this); |
John McCall | 0a7dd78 | 2012-08-21 02:47:43 +0000 | [diff] [blame] | 2833 | if (CGM.getLangOpts().ObjCRuntime.hasNativeARC()) { |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2834 | llvm::Value *token = EmitObjCAutoreleasePoolPush(); |
| 2835 | EHStack.pushCleanup<CallObjCAutoreleasePoolObject>(NormalCleanup, token); |
| 2836 | } else { |
| 2837 | llvm::Value *token = EmitObjCMRRAutoreleasePoolPush(); |
| 2838 | EHStack.pushCleanup<CallObjCMRRAutoreleasePoolObject>(NormalCleanup, token); |
| 2839 | } |
| 2840 | |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2841 | for (const auto *I : S.body()) |
| 2842 | EmitStmt(I); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2843 | |
Eric Christopher | 73fb350 | 2011-10-13 21:45:18 +0000 | [diff] [blame] | 2844 | if (DI) |
| 2845 | DI->EmitLexicalBlockEnd(Builder, S.getRBracLoc()); |
John McCall | f85e193 | 2011-06-15 23:02:42 +0000 | [diff] [blame] | 2846 | } |
John McCall | 0c24c80 | 2011-06-24 23:21:27 +0000 | [diff] [blame] | 2847 | |
| 2848 | /// EmitExtendGCLifetime - Given a pointer to an Objective-C object, |
| 2849 | /// make sure it survives garbage collection until this point. |
| 2850 | void CodeGenFunction::EmitExtendGCLifetime(llvm::Value *object) { |
| 2851 | // We just use an inline assembly. |
John McCall | 0c24c80 | 2011-06-24 23:21:27 +0000 | [diff] [blame] | 2852 | llvm::FunctionType *extenderType |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 2853 | = llvm::FunctionType::get(VoidTy, VoidPtrTy, RequiredArgs::All); |
John McCall | 0c24c80 | 2011-06-24 23:21:27 +0000 | [diff] [blame] | 2854 | llvm::Value *extender |
| 2855 | = llvm::InlineAsm::get(extenderType, |
| 2856 | /* assembly */ "", |
| 2857 | /* constraints */ "r", |
| 2858 | /* side effects */ true); |
| 2859 | |
| 2860 | object = Builder.CreateBitCast(object, VoidPtrTy); |
John McCall | bd7370a | 2013-02-28 19:01:20 +0000 | [diff] [blame] | 2861 | EmitNounwindRuntimeCall(extender, object); |
John McCall | 0c24c80 | 2011-06-24 23:21:27 +0000 | [diff] [blame] | 2862 | } |
| 2863 | |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2864 | /// GenerateObjCAtomicSetterCopyHelperFunction - Given a c++ object type with |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2865 | /// non-trivial copy assignment function, produce following helper function. |
| 2866 | /// static void copyHelper(Ty *dest, const Ty *source) { *dest = *source; } |
| 2867 | /// |
| 2868 | llvm::Constant * |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2869 | CodeGenFunction::GenerateObjCAtomicSetterCopyHelperFunction( |
| 2870 | const ObjCPropertyImplDecl *PID) { |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 2871 | if (!getLangOpts().CPlusPlus || |
Rafael Espindola | 90f6926 | 2012-12-18 04:29:34 +0000 | [diff] [blame] | 2872 | !getLangOpts().ObjCRuntime.hasAtomicCopyHelper()) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2873 | return nullptr; |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2874 | QualType Ty = PID->getPropertyIvarDecl()->getType(); |
| 2875 | if (!Ty->isRecordType()) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2876 | return nullptr; |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2877 | const ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2878 | if ((!(PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_atomic))) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2879 | return nullptr; |
| 2880 | llvm::Constant *HelperFn = nullptr; |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2881 | if (hasTrivialSetExpr(PID)) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2882 | return nullptr; |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2883 | assert(PID->getSetterCXXAssignment() && "SetterCXXAssignment - null"); |
| 2884 | if ((HelperFn = CGM.getAtomicSetterHelperFnMap(Ty))) |
| 2885 | return HelperFn; |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2886 | |
| 2887 | ASTContext &C = getContext(); |
| 2888 | IdentifierInfo *II |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2889 | = &CGM.getContext().Idents.get("__assign_helper_atomic_property_"); |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2890 | FunctionDecl *FD = FunctionDecl::Create(C, |
| 2891 | C.getTranslationUnitDecl(), |
| 2892 | SourceLocation(), |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2893 | SourceLocation(), II, C.VoidTy, |
| 2894 | nullptr, SC_Static, |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2895 | false, |
Eric Christopher | b92bd4b | 2012-04-12 02:16:49 +0000 | [diff] [blame] | 2896 | false); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2897 | |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2898 | QualType DestTy = C.getPointerType(Ty); |
| 2899 | QualType SrcTy = Ty; |
| 2900 | SrcTy.addConst(); |
| 2901 | SrcTy = C.getPointerType(SrcTy); |
| 2902 | |
| 2903 | FunctionArgList args; |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2904 | ImplicitParamDecl dstDecl(getContext(), FD, SourceLocation(), nullptr,DestTy); |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2905 | args.push_back(&dstDecl); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2906 | ImplicitParamDecl srcDecl(getContext(), FD, SourceLocation(), nullptr, SrcTy); |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2907 | args.push_back(&srcDecl); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2908 | |
| 2909 | const CGFunctionInfo &FI = CGM.getTypes().arrangeFreeFunctionDeclaration( |
| 2910 | C.VoidTy, args, FunctionType::ExtInfo(), RequiredArgs::All); |
| 2911 | |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 2912 | llvm::FunctionType *LTy = CGM.getTypes().GetFunctionType(FI); |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2913 | |
| 2914 | llvm::Function *Fn = |
| 2915 | llvm::Function::Create(LTy, llvm::GlobalValue::InternalLinkage, |
Eric Christopher | 16098f3 | 2012-03-29 17:31:31 +0000 | [diff] [blame] | 2916 | "__assign_helper_atomic_property_", |
| 2917 | &CGM.getModule()); |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2918 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2919 | StartFunction(FD, C.VoidTy, Fn, FI, args); |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2920 | |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 2921 | DeclRefExpr DstExpr(&dstDecl, false, DestTy, |
| 2922 | VK_RValue, SourceLocation()); |
| 2923 | UnaryOperator DST(&DstExpr, UO_Deref, DestTy->getPointeeType(), |
| 2924 | VK_LValue, OK_Ordinary, SourceLocation()); |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2925 | |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 2926 | DeclRefExpr SrcExpr(&srcDecl, false, SrcTy, |
| 2927 | VK_RValue, SourceLocation()); |
| 2928 | UnaryOperator SRC(&SrcExpr, UO_Deref, SrcTy->getPointeeType(), |
| 2929 | VK_LValue, OK_Ordinary, SourceLocation()); |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2930 | |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 2931 | Expr *Args[2] = { &DST, &SRC }; |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2932 | CallExpr *CalleeExp = cast<CallExpr>(PID->getSetterCXXAssignment()); |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 2933 | CXXOperatorCallExpr TheCall(C, OO_Equal, CalleeExp->getCallee(), |
Benjamin Kramer | 3b6bef9 | 2012-08-24 11:54:20 +0000 | [diff] [blame] | 2934 | Args, DestTy->getPointeeType(), |
Lang Hames | be9af12 | 2012-10-02 04:45:10 +0000 | [diff] [blame] | 2935 | VK_LValue, SourceLocation(), false); |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 2936 | |
| 2937 | EmitStmt(&TheCall); |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 2938 | |
| 2939 | FinishFunction(); |
Fariborz Jahanian | cd93b96 | 2012-01-06 22:33:54 +0000 | [diff] [blame] | 2940 | HelperFn = llvm::ConstantExpr::getBitCast(Fn, VoidPtrTy); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2941 | CGM.setAtomicSetterHelperFnMap(Ty, HelperFn); |
Fariborz Jahanian | cd93b96 | 2012-01-06 22:33:54 +0000 | [diff] [blame] | 2942 | return HelperFn; |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2943 | } |
| 2944 | |
| 2945 | llvm::Constant * |
| 2946 | CodeGenFunction::GenerateObjCAtomicGetterCopyHelperFunction( |
| 2947 | const ObjCPropertyImplDecl *PID) { |
John McCall | 260611a | 2012-06-20 06:18:46 +0000 | [diff] [blame] | 2948 | if (!getLangOpts().CPlusPlus || |
Rafael Espindola | 90f6926 | 2012-12-18 04:29:34 +0000 | [diff] [blame] | 2949 | !getLangOpts().ObjCRuntime.hasAtomicCopyHelper()) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2950 | return nullptr; |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2951 | const ObjCPropertyDecl *PD = PID->getPropertyDecl(); |
| 2952 | QualType Ty = PD->getType(); |
| 2953 | if (!Ty->isRecordType()) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2954 | return nullptr; |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2955 | if ((!(PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_atomic))) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2956 | return nullptr; |
| 2957 | llvm::Constant *HelperFn = nullptr; |
| 2958 | |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2959 | if (hasTrivialGetExpr(PID)) |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2960 | return nullptr; |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2961 | assert(PID->getGetterCXXConstructor() && "getGetterCXXConstructor - null"); |
| 2962 | if ((HelperFn = CGM.getAtomicGetterHelperFnMap(Ty))) |
| 2963 | return HelperFn; |
| 2964 | |
| 2965 | |
| 2966 | ASTContext &C = getContext(); |
| 2967 | IdentifierInfo *II |
| 2968 | = &CGM.getContext().Idents.get("__copy_helper_atomic_property_"); |
| 2969 | FunctionDecl *FD = FunctionDecl::Create(C, |
| 2970 | C.getTranslationUnitDecl(), |
| 2971 | SourceLocation(), |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2972 | SourceLocation(), II, C.VoidTy, |
| 2973 | nullptr, SC_Static, |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2974 | false, |
Eric Christopher | b92bd4b | 2012-04-12 02:16:49 +0000 | [diff] [blame] | 2975 | false); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2976 | |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2977 | QualType DestTy = C.getPointerType(Ty); |
| 2978 | QualType SrcTy = Ty; |
| 2979 | SrcTy.addConst(); |
| 2980 | SrcTy = C.getPointerType(SrcTy); |
| 2981 | |
| 2982 | FunctionArgList args; |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2983 | ImplicitParamDecl dstDecl(getContext(), FD, SourceLocation(), nullptr,DestTy); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2984 | args.push_back(&dstDecl); |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2985 | ImplicitParamDecl srcDecl(getContext(), FD, SourceLocation(), nullptr, SrcTy); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2986 | args.push_back(&srcDecl); |
Stephen Hines | 651f13c | 2014-04-23 16:59:28 -0700 | [diff] [blame] | 2987 | |
| 2988 | const CGFunctionInfo &FI = CGM.getTypes().arrangeFreeFunctionDeclaration( |
| 2989 | C.VoidTy, args, FunctionType::ExtInfo(), RequiredArgs::All); |
| 2990 | |
John McCall | de5d3c7 | 2012-02-17 03:33:10 +0000 | [diff] [blame] | 2991 | llvm::FunctionType *LTy = CGM.getTypes().GetFunctionType(FI); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2992 | |
| 2993 | llvm::Function *Fn = |
| 2994 | llvm::Function::Create(LTy, llvm::GlobalValue::InternalLinkage, |
| 2995 | "__copy_helper_atomic_property_", &CGM.getModule()); |
| 2996 | |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 2997 | StartFunction(FD, C.VoidTy, Fn, FI, args); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 2998 | |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 2999 | DeclRefExpr SrcExpr(&srcDecl, false, SrcTy, |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 3000 | VK_RValue, SourceLocation()); |
| 3001 | |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 3002 | UnaryOperator SRC(&SrcExpr, UO_Deref, SrcTy->getPointeeType(), |
| 3003 | VK_LValue, OK_Ordinary, SourceLocation()); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 3004 | |
| 3005 | CXXConstructExpr *CXXConstExpr = |
| 3006 | cast<CXXConstructExpr>(PID->getGetterCXXConstructor()); |
| 3007 | |
| 3008 | SmallVector<Expr*, 4> ConstructorArgs; |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 3009 | ConstructorArgs.push_back(&SRC); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 3010 | CXXConstructExpr::arg_iterator A = CXXConstExpr->arg_begin(); |
| 3011 | ++A; |
| 3012 | |
| 3013 | for (CXXConstructExpr::arg_iterator AEnd = CXXConstExpr->arg_end(); |
| 3014 | A != AEnd; ++A) |
| 3015 | ConstructorArgs.push_back(*A); |
| 3016 | |
| 3017 | CXXConstructExpr *TheCXXConstructExpr = |
| 3018 | CXXConstructExpr::Create(C, Ty, SourceLocation(), |
| 3019 | CXXConstExpr->getConstructor(), |
| 3020 | CXXConstExpr->isElidable(), |
Benjamin Kramer | 3b6bef9 | 2012-08-24 11:54:20 +0000 | [diff] [blame] | 3021 | ConstructorArgs, |
Sebastian Redl | 5b9cc5d | 2012-02-11 23:51:47 +0000 | [diff] [blame] | 3022 | CXXConstExpr->hadMultipleCandidates(), |
| 3023 | CXXConstExpr->isListInitialization(), |
Stephen Hines | 176edba | 2014-12-01 14:53:08 -0800 | [diff] [blame] | 3024 | CXXConstExpr->isStdInitListInitialization(), |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 3025 | CXXConstExpr->requiresZeroInitialization(), |
Eric Christopher | 16098f3 | 2012-03-29 17:31:31 +0000 | [diff] [blame] | 3026 | CXXConstExpr->getConstructionKind(), |
| 3027 | SourceRange()); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 3028 | |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 3029 | DeclRefExpr DstExpr(&dstDecl, false, DestTy, |
| 3030 | VK_RValue, SourceLocation()); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 3031 | |
John McCall | f4b88a4 | 2012-03-10 09:33:50 +0000 | [diff] [blame] | 3032 | RValue DV = EmitAnyExpr(&DstExpr); |
Eric Christopher | 16098f3 | 2012-03-29 17:31:31 +0000 | [diff] [blame] | 3033 | CharUnits Alignment |
| 3034 | = getContext().getTypeAlignInChars(TheCXXConstructExpr->getType()); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 3035 | EmitAggExpr(TheCXXConstructExpr, |
| 3036 | AggValueSlot::forAddr(DV.getScalarVal(), Alignment, Qualifiers(), |
| 3037 | AggValueSlot::IsDestructed, |
| 3038 | AggValueSlot::DoesNotNeedGCBarriers, |
Chad Rosier | 649b4a1 | 2012-03-29 17:37:10 +0000 | [diff] [blame] | 3039 | AggValueSlot::IsNotAliased)); |
Fariborz Jahanian | 20abee6 | 2012-01-10 00:37:01 +0000 | [diff] [blame] | 3040 | |
| 3041 | FinishFunction(); |
| 3042 | HelperFn = llvm::ConstantExpr::getBitCast(Fn, VoidPtrTy); |
| 3043 | CGM.setAtomicGetterHelperFnMap(Ty, HelperFn); |
| 3044 | return HelperFn; |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 3045 | } |
| 3046 | |
Eli Friedman | cae40c4 | 2012-02-28 01:08:45 +0000 | [diff] [blame] | 3047 | llvm::Value * |
| 3048 | CodeGenFunction::EmitBlockCopyAndAutorelease(llvm::Value *Block, QualType Ty) { |
| 3049 | // Get selectors for retain/autorelease. |
Eli Friedman | 8c72a7d | 2012-03-01 22:52:28 +0000 | [diff] [blame] | 3050 | IdentifierInfo *CopyID = &getContext().Idents.get("copy"); |
| 3051 | Selector CopySelector = |
| 3052 | getContext().Selectors.getNullarySelector(CopyID); |
Eli Friedman | cae40c4 | 2012-02-28 01:08:45 +0000 | [diff] [blame] | 3053 | IdentifierInfo *AutoreleaseID = &getContext().Idents.get("autorelease"); |
| 3054 | Selector AutoreleaseSelector = |
| 3055 | getContext().Selectors.getNullarySelector(AutoreleaseID); |
| 3056 | |
| 3057 | // Emit calls to retain/autorelease. |
| 3058 | CGObjCRuntime &Runtime = CGM.getObjCRuntime(); |
| 3059 | llvm::Value *Val = Block; |
| 3060 | RValue Result; |
| 3061 | Result = Runtime.GenerateMessageSend(*this, ReturnValueSlot(), |
Eli Friedman | 8c72a7d | 2012-03-01 22:52:28 +0000 | [diff] [blame] | 3062 | Ty, CopySelector, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 3063 | Val, CallArgList(), nullptr, nullptr); |
Eli Friedman | cae40c4 | 2012-02-28 01:08:45 +0000 | [diff] [blame] | 3064 | Val = Result.getScalarVal(); |
| 3065 | Result = Runtime.GenerateMessageSend(*this, ReturnValueSlot(), |
| 3066 | Ty, AutoreleaseSelector, |
Stephen Hines | 6bcf27b | 2014-05-29 04:14:42 -0700 | [diff] [blame] | 3067 | Val, CallArgList(), nullptr, nullptr); |
Eli Friedman | cae40c4 | 2012-02-28 01:08:45 +0000 | [diff] [blame] | 3068 | Val = Result.getScalarVal(); |
| 3069 | return Val; |
| 3070 | } |
| 3071 | |
Fariborz Jahanian | 84e4986 | 2012-01-06 00:29:35 +0000 | [diff] [blame] | 3072 | |
Ted Kremenek | 2979ec7 | 2008-04-09 15:51:31 +0000 | [diff] [blame] | 3073 | CGObjCRuntime::~CGObjCRuntime() {} |