15508518a2702b00be3b15a26d772bde968972f54Anders Carlsson//===---- CGBuiltin.cpp - Emit LLVM Code for builtins ---------------------===// 25508518a2702b00be3b15a26d772bde968972f54Anders Carlsson// 35508518a2702b00be3b15a26d772bde968972f54Anders Carlsson// The LLVM Compiler Infrastructure 45508518a2702b00be3b15a26d772bde968972f54Anders Carlsson// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75508518a2702b00be3b15a26d772bde968972f54Anders Carlsson// 85508518a2702b00be3b15a26d772bde968972f54Anders Carlsson//===----------------------------------------------------------------------===// 95508518a2702b00be3b15a26d772bde968972f54Anders Carlsson// 105508518a2702b00be3b15a26d772bde968972f54Anders Carlsson// This contains code to emit Objective-C code as LLVM code. 115508518a2702b00be3b15a26d772bde968972f54Anders Carlsson// 125508518a2702b00be3b15a26d772bde968972f54Anders Carlsson//===----------------------------------------------------------------------===// 135508518a2702b00be3b15a26d772bde968972f54Anders Carlsson 14bcbd03ac0ac0890a436e1a179d3a285e914d41faDevang Patel#include "CGDebugInfo.h" 152979ec73b4f974d85f2ce84167712177a44c6f09Ted Kremenek#include "CGObjCRuntime.h" 165508518a2702b00be3b15a26d772bde968972f54Anders Carlsson#include "CodeGenFunction.h" 175508518a2702b00be3b15a26d772bde968972f54Anders Carlsson#include "CodeGenModule.h" 18f85e193739c953358c865005855253af4f68a497John McCall#include "TargetInfo.h" 1985c59edda02df48fae8dc85049743319bc6e7e89Daniel Dunbar#include "clang/AST/ASTContext.h" 20c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/DeclObjC.h" 2116f0049415ec596504891259e2a83e19871c0d52Chris Lattner#include "clang/AST/StmtObjC.h" 22e66f4e3e3ae9d7d11b0c302211066fad69228abaDaniel Dunbar#include "clang/Basic/Diagnostic.h" 233d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson#include "llvm/ADT/STLExtras.h" 24c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar#include "llvm/Target/TargetData.h" 25f85e193739c953358c865005855253af4f68a497John McCall#include "llvm/InlineAsm.h" 265508518a2702b00be3b15a26d772bde968972f54Anders Carlssonusing namespace clang; 275508518a2702b00be3b15a26d772bde968972f54Anders Carlssonusing namespace CodeGen; 285508518a2702b00be3b15a26d772bde968972f54Anders Carlsson 29f85e193739c953358c865005855253af4f68a497John McCalltypedef llvm::PointerIntPair<llvm::Value*,1,bool> TryEmitResult; 30f85e193739c953358c865005855253af4f68a497John McCallstatic TryEmitResult 31f85e193739c953358c865005855253af4f68a497John McCalltryEmitARCRetainScalarExpr(CodeGenFunction &CGF, const Expr *e); 32f85e193739c953358c865005855253af4f68a497John McCall 33f85e193739c953358c865005855253af4f68a497John McCall/// Given the address of a variable of pointer type, find the correct 34f85e193739c953358c865005855253af4f68a497John McCall/// null to store into it. 35f85e193739c953358c865005855253af4f68a497John McCallstatic llvm::Constant *getNullForVariable(llvm::Value *addr) { 362acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *type = 37f85e193739c953358c865005855253af4f68a497John McCall cast<llvm::PointerType>(addr->getType())->getElementType(); 38f85e193739c953358c865005855253af4f68a497John McCall return llvm::ConstantPointerNull::get(cast<llvm::PointerType>(type)); 39f85e193739c953358c865005855253af4f68a497John McCall} 40f85e193739c953358c865005855253af4f68a497John McCall 418fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner/// Emits an instance of NSConstantString representing the object. 421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpllvm::Value *CodeGenFunction::EmitObjCStringLiteral(const ObjCStringLiteral *E) 4371fcec9abf2ce66d5e17a24bd021680e94e42f0dDaniel Dunbar{ 440d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall llvm::Constant *C = 450d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall CGM.getObjCRuntime().GenerateConstantString(E->getString()); 46ed7c618f849e2541b1d0288c43154937652c5b15Daniel Dunbar // FIXME: This bitcast should just be made an invariant on the Runtime. 473c4972def972f8ca44dcd0561779a12aaa6fec97Owen Anderson return llvm::ConstantExpr::getBitCast(C, ConvertType(E->getType())); 488fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 498fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner 508fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner/// Emit a selector. 518fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattnerllvm::Value *CodeGenFunction::EmitObjCSelectorExpr(const ObjCSelectorExpr *E) { 528fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner // Untyped selector. 538fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner // Note that this implementation allows for non-constant strings to be passed 548fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner // as arguments to @selector(). Currently, the only thing preventing this 558fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner // behaviour is the type checking in the front end. 566d5a1c28593443f3973ef38f8fa042d59182412dDaniel Dunbar return CGM.getObjCRuntime().GetSelector(Builder, E->getSelector()); 578fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner} 588fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner 59ed7c618f849e2541b1d0288c43154937652c5b15Daniel Dunbarllvm::Value *CodeGenFunction::EmitObjCProtocolExpr(const ObjCProtocolExpr *E) { 60ed7c618f849e2541b1d0288c43154937652c5b15Daniel Dunbar // FIXME: This should pass the Decl not the name. 61ed7c618f849e2541b1d0288c43154937652c5b15Daniel Dunbar return CGM.getObjCRuntime().GenerateProtocolRef(Builder, E->getProtocol()); 62ed7c618f849e2541b1d0288c43154937652c5b15Daniel Dunbar} 638fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner 64926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor/// \brief Adjust the type of the result of an Objective-C message send 65926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor/// expression when the method has a related result type. 66926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregorstatic RValue AdjustRelatedResultType(CodeGenFunction &CGF, 67926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor const Expr *E, 68926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor const ObjCMethodDecl *Method, 69926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor RValue Result) { 70926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor if (!Method) 71926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor return Result; 72f85e193739c953358c865005855253af4f68a497John McCall 73926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor if (!Method->hasRelatedResultType() || 74926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor CGF.getContext().hasSameType(E->getType(), Method->getResultType()) || 75926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor !Result.isScalar()) 76926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor return Result; 77926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor 78926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor // We have applied a related result type. Cast the rvalue appropriately. 79926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor return RValue::get(CGF.Builder.CreateBitCast(Result.getScalarVal(), 80926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor CGF.ConvertType(E->getType()))); 81926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor} 828fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner 83dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall/// Decide whether to extend the lifetime of the receiver of a 84dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall/// returns-inner-pointer message. 85dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCallstatic bool 86dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCallshouldExtendReceiverForInnerPointerMessage(const ObjCMessageExpr *message) { 87dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall switch (message->getReceiverKind()) { 88dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 89dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // For a normal instance message, we should extend unless the 90dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // receiver is loaded from a variable with precise lifetime. 91dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall case ObjCMessageExpr::Instance: { 92dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall const Expr *receiver = message->getInstanceReceiver(); 93dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(receiver); 94dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall if (!ice || ice->getCastKind() != CK_LValueToRValue) return true; 95dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall receiver = ice->getSubExpr()->IgnoreParens(); 96dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 97dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // Only __strong variables. 98dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall if (receiver->getType().getObjCLifetime() != Qualifiers::OCL_Strong) 99dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall return true; 100dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 101dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // All ivars and fields have precise lifetime. 102dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall if (isa<MemberExpr>(receiver) || isa<ObjCIvarRefExpr>(receiver)) 103dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall return false; 104dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 105dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // Otherwise, check for variables. 106dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall const DeclRefExpr *declRef = dyn_cast<DeclRefExpr>(ice->getSubExpr()); 107dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall if (!declRef) return true; 108dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall const VarDecl *var = dyn_cast<VarDecl>(declRef->getDecl()); 109dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall if (!var) return true; 110dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 111dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // All variables have precise lifetime except local variables with 112dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // automatic storage duration that aren't specially marked. 113dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall return (var->hasLocalStorage() && 114dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall !var->hasAttr<ObjCPreciseLifetimeAttr>()); 115dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall } 116dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 117dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall case ObjCMessageExpr::Class: 118dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall case ObjCMessageExpr::SuperClass: 119dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // It's never necessary for class objects. 120dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall return false; 121dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 122dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall case ObjCMessageExpr::SuperInstance: 123dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // We generally assume that 'self' lives throughout a method call. 124dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall return false; 125dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall } 126dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 127dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall llvm_unreachable("invalid receiver kind"); 128dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall} 129dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 130ef072fd2f3347cfd857d6eb787b245b950771430John McCallRValue CodeGenFunction::EmitObjCMessageExpr(const ObjCMessageExpr *E, 131ef072fd2f3347cfd857d6eb787b245b950771430John McCall ReturnValueSlot Return) { 1328fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner // Only the lookup mechanism and first two arguments of the method 1338fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner // implementation vary between runtimes. We can get the receiver and 1348fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner // arguments in generic code. 1351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 136f85e193739c953358c865005855253af4f68a497John McCall bool isDelegateInit = E->isDelegateInitCall(); 137f85e193739c953358c865005855253af4f68a497John McCall 138dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall const ObjCMethodDecl *method = E->getMethodDecl(); 139dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 140f85e193739c953358c865005855253af4f68a497John McCall // We don't retain the receiver in delegate init calls, and this is 141f85e193739c953358c865005855253af4f68a497John McCall // safe because the receiver value is always loaded from 'self', 142f85e193739c953358c865005855253af4f68a497John McCall // which we zero out. We don't want to Block_copy block receivers, 143f85e193739c953358c865005855253af4f68a497John McCall // though. 144f85e193739c953358c865005855253af4f68a497John McCall bool retainSelf = 145f85e193739c953358c865005855253af4f68a497John McCall (!isDelegateInit && 146f85e193739c953358c865005855253af4f68a497John McCall CGM.getLangOptions().ObjCAutoRefCount && 147dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall method && 148dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall method->hasAttr<NSConsumesSelfAttr>()); 149f85e193739c953358c865005855253af4f68a497John McCall 150208ff5e8a073de2a5d15cbe03cab8a4c0d935e28Daniel Dunbar CGObjCRuntime &Runtime = CGM.getObjCRuntime(); 1518fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner bool isSuperMessage = false; 152f56f1913e91ad32bed52dd3f6afc26735d336584Daniel Dunbar bool isClassMessage = false; 153c6cd5fd3eae71f8841504a396563343cfaaf503eDavid Chisnall ObjCInterfaceDecl *OID = 0; 1548fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner // Find the receiver 155926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor QualType ReceiverType; 1560b647a6ea18151149d624ab373e6fe0e819e4a9aDaniel Dunbar llvm::Value *Receiver = 0; 15704badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor switch (E->getReceiverKind()) { 15804badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor case ObjCMessageExpr::Instance: 159926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor ReceiverType = E->getInstanceReceiver()->getType(); 160f85e193739c953358c865005855253af4f68a497John McCall if (retainSelf) { 161f85e193739c953358c865005855253af4f68a497John McCall TryEmitResult ter = tryEmitARCRetainScalarExpr(*this, 162f85e193739c953358c865005855253af4f68a497John McCall E->getInstanceReceiver()); 163f85e193739c953358c865005855253af4f68a497John McCall Receiver = ter.getPointer(); 164dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall if (ter.getInt()) retainSelf = false; 165f85e193739c953358c865005855253af4f68a497John McCall } else 166f85e193739c953358c865005855253af4f68a497John McCall Receiver = EmitScalarExpr(E->getInstanceReceiver()); 16704badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor break; 1681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16904badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor case ObjCMessageExpr::Class: { 170926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor ReceiverType = E->getClassReceiver(); 171926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor const ObjCObjectType *ObjTy = ReceiverType->getAs<ObjCObjectType>(); 1723031c63f7b5b09d5f64609fa7a1922a05b520fa7John McCall assert(ObjTy && "Invalid Objective-C class message send"); 1733031c63f7b5b09d5f64609fa7a1922a05b520fa7John McCall OID = ObjTy->getInterface(); 1743031c63f7b5b09d5f64609fa7a1922a05b520fa7John McCall assert(OID && "Invalid Objective-C class message send"); 175c6cd5fd3eae71f8841504a396563343cfaaf503eDavid Chisnall Receiver = Runtime.GetClass(Builder, OID); 176f56f1913e91ad32bed52dd3f6afc26735d336584Daniel Dunbar isClassMessage = true; 17704badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor break; 17804badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor } 17904badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor 18004badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor case ObjCMessageExpr::SuperInstance: 181926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor ReceiverType = E->getSuperType(); 18204badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor Receiver = LoadObjCSelf(); 1838fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner isSuperMessage = true; 18404badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor break; 18504badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor 18604badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor case ObjCMessageExpr::SuperClass: 187926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor ReceiverType = E->getSuperType(); 1888fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner Receiver = LoadObjCSelf(); 18904badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor isSuperMessage = true; 19004badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor isClassMessage = true; 19104badcf84c8d504d8491c7c7e29b58f52cb16640Douglas Gregor break; 1928fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner } 1938fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner 194dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall if (retainSelf) 195dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall Receiver = EmitARCRetainNonBlock(Receiver); 196dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 197dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // In ARC, we sometimes want to "extend the lifetime" 198dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // (i.e. retain+autorelease) of receivers of returns-inner-pointer 199dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall // messages. 200dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall if (getLangOptions().ObjCAutoRefCount && method && 201dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall method->hasAttr<ObjCReturnsInnerPointerAttr>() && 202dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall shouldExtendReceiverForInnerPointerMessage(E)) 203dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall Receiver = EmitARCRetainAutorelease(ReceiverType, Receiver); 204dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall 205f85e193739c953358c865005855253af4f68a497John McCall QualType ResultType = 206dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall method ? method->getResultType() : E->getType(); 207f85e193739c953358c865005855253af4f68a497John McCall 20819cd87eb5fb3c197e631ce08fd52c446c4d4e8f1Daniel Dunbar CallArgList Args; 209dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall EmitCallArgs(Args, method, E->arg_begin(), E->arg_end()); 2101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 211f85e193739c953358c865005855253af4f68a497John McCall // For delegate init calls in ARC, do an unsafe store of null into 212f85e193739c953358c865005855253af4f68a497John McCall // self. This represents the call taking direct ownership of that 213f85e193739c953358c865005855253af4f68a497John McCall // value. We have to do this after emitting the other call 214f85e193739c953358c865005855253af4f68a497John McCall // arguments because they might also reference self, but we don't 215f85e193739c953358c865005855253af4f68a497John McCall // have to worry about any of them modifying self because that would 216f85e193739c953358c865005855253af4f68a497John McCall // be an undefined read and write of an object in unordered 217f85e193739c953358c865005855253af4f68a497John McCall // expressions. 218f85e193739c953358c865005855253af4f68a497John McCall if (isDelegateInit) { 219f85e193739c953358c865005855253af4f68a497John McCall assert(getLangOptions().ObjCAutoRefCount && 220f85e193739c953358c865005855253af4f68a497John McCall "delegate init calls should only be marked in ARC"); 221f85e193739c953358c865005855253af4f68a497John McCall 222f85e193739c953358c865005855253af4f68a497John McCall // Do an unsafe store of null into self. 223f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *selfAddr = 224f85e193739c953358c865005855253af4f68a497John McCall LocalDeclMap[cast<ObjCMethodDecl>(CurCodeDecl)->getSelfDecl()]; 225f85e193739c953358c865005855253af4f68a497John McCall assert(selfAddr && "no self entry for a delegate init call?"); 226f85e193739c953358c865005855253af4f68a497John McCall 227f85e193739c953358c865005855253af4f68a497John McCall Builder.CreateStore(getNullForVariable(selfAddr), selfAddr); 228f85e193739c953358c865005855253af4f68a497John McCall } 2297e70fb217dcdf96faf34df3e197c3831c86f8089Anders Carlsson 230926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor RValue result; 2318fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner if (isSuperMessage) { 2329384c768e93f270118a30ce96546083a666da284Chris Lattner // super is only valid in an Objective-C method 2339384c768e93f270118a30ce96546083a666da284Chris Lattner const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); 2347ce77920a35060f1c8dd72e541e42ce296ccd168Fariborz Jahanian bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext()); 235926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor result = Runtime.GenerateMessageSendSuper(*this, Return, ResultType, 236926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor E->getSelector(), 237926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor OMD->getClassInterface(), 238926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor isCategoryImpl, 239926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor Receiver, 240926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor isClassMessage, 241926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor Args, 242dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall method); 243926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor } else { 244926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor result = Runtime.GenerateMessageSend(*this, Return, ResultType, 245926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor E->getSelector(), 246926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor Receiver, Args, OID, 247dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall method); 2488fdf32822be2238aa7db62d40e75b168b637ab7dChris Lattner } 249f85e193739c953358c865005855253af4f68a497John McCall 250f85e193739c953358c865005855253af4f68a497John McCall // For delegate init calls in ARC, implicitly store the result of 251f85e193739c953358c865005855253af4f68a497John McCall // the call back into self. This takes ownership of the value. 252f85e193739c953358c865005855253af4f68a497John McCall if (isDelegateInit) { 253f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *selfAddr = 254f85e193739c953358c865005855253af4f68a497John McCall LocalDeclMap[cast<ObjCMethodDecl>(CurCodeDecl)->getSelfDecl()]; 255f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *newSelf = result.getScalarVal(); 256f85e193739c953358c865005855253af4f68a497John McCall 257f85e193739c953358c865005855253af4f68a497John McCall // The delegate return type isn't necessarily a matching type; in 258f85e193739c953358c865005855253af4f68a497John McCall // fact, it's quite likely to be 'id'. 2592acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *selfTy = 260f85e193739c953358c865005855253af4f68a497John McCall cast<llvm::PointerType>(selfAddr->getType())->getElementType(); 261f85e193739c953358c865005855253af4f68a497John McCall newSelf = Builder.CreateBitCast(newSelf, selfTy); 262f85e193739c953358c865005855253af4f68a497John McCall 263f85e193739c953358c865005855253af4f68a497John McCall Builder.CreateStore(newSelf, selfAddr); 264f85e193739c953358c865005855253af4f68a497John McCall } 265f85e193739c953358c865005855253af4f68a497John McCall 266dc7c5ad7a15914b7ae24f31f18a20ad2f8ecd0bcJohn McCall return AdjustRelatedResultType(*this, E, method, result); 2675508518a2702b00be3b15a26d772bde968972f54Anders Carlsson} 2685508518a2702b00be3b15a26d772bde968972f54Anders Carlsson 269f85e193739c953358c865005855253af4f68a497John McCallnamespace { 270f85e193739c953358c865005855253af4f68a497John McCallstruct FinishARCDealloc : EHScopeStack::Cleanup { 271ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 272f85e193739c953358c865005855253af4f68a497John McCall const ObjCMethodDecl *method = cast<ObjCMethodDecl>(CGF.CurCodeDecl); 273799d34e9505a833549c71f2ac5f842da157ea031John McCall 274799d34e9505a833549c71f2ac5f842da157ea031John McCall const ObjCImplDecl *impl = cast<ObjCImplDecl>(method->getDeclContext()); 275f85e193739c953358c865005855253af4f68a497John McCall const ObjCInterfaceDecl *iface = impl->getClassInterface(); 276f85e193739c953358c865005855253af4f68a497John McCall if (!iface->getSuperClass()) return; 277f85e193739c953358c865005855253af4f68a497John McCall 278799d34e9505a833549c71f2ac5f842da157ea031John McCall bool isCategory = isa<ObjCCategoryImplDecl>(impl); 279799d34e9505a833549c71f2ac5f842da157ea031John McCall 280f85e193739c953358c865005855253af4f68a497John McCall // Call [super dealloc] if we have a superclass. 281f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *self = CGF.LoadObjCSelf(); 282f85e193739c953358c865005855253af4f68a497John McCall 283f85e193739c953358c865005855253af4f68a497John McCall CallArgList args; 284f85e193739c953358c865005855253af4f68a497John McCall CGF.CGM.getObjCRuntime().GenerateMessageSendSuper(CGF, ReturnValueSlot(), 285f85e193739c953358c865005855253af4f68a497John McCall CGF.getContext().VoidTy, 286f85e193739c953358c865005855253af4f68a497John McCall method->getSelector(), 287f85e193739c953358c865005855253af4f68a497John McCall iface, 288799d34e9505a833549c71f2ac5f842da157ea031John McCall isCategory, 289f85e193739c953358c865005855253af4f68a497John McCall self, 290f85e193739c953358c865005855253af4f68a497John McCall /*is class msg*/ false, 291f85e193739c953358c865005855253af4f68a497John McCall args, 292f85e193739c953358c865005855253af4f68a497John McCall method); 293f85e193739c953358c865005855253af4f68a497John McCall } 294f85e193739c953358c865005855253af4f68a497John McCall}; 295f85e193739c953358c865005855253af4f68a497John McCall} 296f85e193739c953358c865005855253af4f68a497John McCall 297af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// StartObjCMethod - Begin emission of an ObjCMethod. This generates 298af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// the LLVM function and sets the other context used by 299af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// CodeGenFunction. 300679a502d462ef819e6175b58e255ca3f3391e7cfFariborz Jahanianvoid CodeGenFunction::StartObjCMethod(const ObjCMethodDecl *OMD, 3018d3f8979e46f9d0b8735566eabe471db0e1e0e53Devang Patel const ObjCContainerDecl *CD, 3028d3f8979e46f9d0b8735566eabe471db0e1e0e53Devang Patel SourceLocation StartLoc) { 303d26bc76c98006609002d9930f8840490e88ac5b5John McCall FunctionArgList args; 3044800ea6ff8017cf803c32a5fd63b94c0614014e3Devang Patel // Check if we should generate debug info for this method. 305aa11289f754d220c9c155b68a4f84cdcfcefef6aDevang Patel if (CGM.getModuleDebugInfo() && !OMD->hasAttr<NoDebugAttr>()) 306aa11289f754d220c9c155b68a4f84cdcfcefef6aDevang Patel DebugInfo = CGM.getModuleDebugInfo(); 3074800ea6ff8017cf803c32a5fd63b94c0614014e3Devang Patel 308679a502d462ef819e6175b58e255ca3f3391e7cfFariborz Jahanian llvm::Function *Fn = CGM.getObjCRuntime().GenerateMethod(OMD, CD); 309f80519b919a348db004fba18530706314d1ebfb5Daniel Dunbar 3100e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar const CGFunctionInfo &FI = CGM.getTypes().getFunctionInfo(OMD); 3110e4f40e1bbc4dce16bbb9870300a435419f1b3d5Daniel Dunbar CGM.SetInternalFunctionAttributes(OMD, Fn, FI); 3124111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner 313d26bc76c98006609002d9930f8840490e88ac5b5John McCall args.push_back(OMD->getSelfDecl()); 314d26bc76c98006609002d9930f8840490e88ac5b5John McCall args.push_back(OMD->getCmdDecl()); 3154111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner 316491306a83c4f0f49f95a3bcbca8580cb98a91c7aArgyrios Kyrtzidis for (ObjCMethodDecl::param_const_iterator PI = OMD->param_begin(), 31789951a86b594513c2a013532ed45d197413b1087Chris Lattner E = OMD->param_end(); PI != E; ++PI) 318d26bc76c98006609002d9930f8840490e88ac5b5John McCall args.push_back(*PI); 319b7ec246872b412f0e7bb9e93eacfd78cfa6adfb3Daniel Dunbar 32014110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne CurGD = OMD; 32114110477887e3dc168ffc6c191e72d705051f99ePeter Collingbourne 3228d3f8979e46f9d0b8735566eabe471db0e1e0e53Devang Patel StartFunction(OMD, OMD->getResultType(), Fn, FI, args, StartLoc); 323f85e193739c953358c865005855253af4f68a497John McCall 324f85e193739c953358c865005855253af4f68a497John McCall // In ARC, certain methods get an extra cleanup. 325f85e193739c953358c865005855253af4f68a497John McCall if (CGM.getLangOptions().ObjCAutoRefCount && 326f85e193739c953358c865005855253af4f68a497John McCall OMD->isInstanceMethod() && 327f85e193739c953358c865005855253af4f68a497John McCall OMD->getSelector().isUnarySelector()) { 328f85e193739c953358c865005855253af4f68a497John McCall const IdentifierInfo *ident = 329f85e193739c953358c865005855253af4f68a497John McCall OMD->getSelector().getIdentifierInfoForSlot(0); 330f85e193739c953358c865005855253af4f68a497John McCall if (ident->isStr("dealloc")) 331f85e193739c953358c865005855253af4f68a497John McCall EHStack.pushCleanup<FinishARCDealloc>(getARCCleanupKind()); 332f85e193739c953358c865005855253af4f68a497John McCall } 333af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 334af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 335f85e193739c953358c865005855253af4f68a497John McCallstatic llvm::Value *emitARCRetainLoadOfScalar(CodeGenFunction &CGF, 336f85e193739c953358c865005855253af4f68a497John McCall LValue lvalue, QualType type); 337f85e193739c953358c865005855253af4f68a497John McCall 338af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// Generate an Objective-C method. An Objective-C method is a C function with 3391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// its pointer, name, and types registered in the class struture. 340af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbarvoid CodeGenFunction::GenerateObjCMethod(const ObjCMethodDecl *OMD) { 3418d3f8979e46f9d0b8735566eabe471db0e1e0e53Devang Patel StartObjCMethod(OMD, OMD->getClassInterface(), OMD->getLocStart()); 3426fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis EmitStmt(OMD->getBody()); 3436fb0aee4f9dc261bbec72e1283ad8dc0557a6d96Argyrios Kyrtzidis FinishFunction(OMD->getBodyRBrace()); 344af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 345af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 34641bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall/// emitStructGetterCall - Call the runtime function to load a property 34741bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall/// into the return value slot. 34841bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCallstatic void emitStructGetterCall(CodeGenFunction &CGF, ObjCIvarDecl *ivar, 34941bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall bool isAtomic, bool hasStrong) { 35041bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall ASTContext &Context = CGF.getContext(); 35141bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall 35241bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall llvm::Value *src = 35341bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), CGF.LoadObjCSelf(), 35441bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall ivar, 0).getAddress(); 35541bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall 35641bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall // objc_copyStruct (ReturnValue, &structIvar, 35741bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall // sizeof (Type of Ivar), isAtomic, false); 35841bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall CallArgList args; 35941bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall 36041bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall llvm::Value *dest = CGF.Builder.CreateBitCast(CGF.ReturnValue, CGF.VoidPtrTy); 36141bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall args.add(RValue::get(dest), Context.VoidPtrTy); 36241bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall 36341bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall src = CGF.Builder.CreateBitCast(src, CGF.VoidPtrTy); 36441bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall args.add(RValue::get(src), Context.VoidPtrTy); 36541bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall 36641bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall CharUnits size = CGF.getContext().getTypeSizeInChars(ivar->getType()); 36741bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall args.add(RValue::get(CGF.CGM.getSize(size)), Context.getSizeType()); 36841bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall args.add(RValue::get(CGF.Builder.getInt1(isAtomic)), Context.BoolTy); 36941bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall args.add(RValue::get(CGF.Builder.getInt1(hasStrong)), Context.BoolTy); 37041bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall 37141bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall llvm::Value *fn = CGF.CGM.getObjCRuntime().GetGetStructFunction(); 37241bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall CGF.EmitCall(CGF.getTypes().getFunctionInfo(Context.VoidTy, args, 37341bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall FunctionType::ExtInfo()), 37441bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall fn, ReturnValueSlot(), args); 37541bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall} 37641bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall 3771e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall/// Determine whether the given architecture supports unaligned atomic 3781e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall/// accesses. They don't have to be fast, just faster than a function 3791e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall/// call and a mutex. 3801e1f4871535f2cadcbf8c9af8cc48a2213192320John McCallstatic bool hasUnalignedAtomics(llvm::Triple::ArchType arch) { 381de24d44665486e98df2aeb2ef5bbc163abfe7981Eli Friedman // FIXME: Allow unaligned atomic load/store on x86. (It is not 382de24d44665486e98df2aeb2ef5bbc163abfe7981Eli Friedman // currently supported by the backend.) 383de24d44665486e98df2aeb2ef5bbc163abfe7981Eli Friedman return 0; 3841e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall} 3851e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 3861e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall/// Return the maximum size that permits atomic accesses for the given 3871e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall/// architecture. 3881e1f4871535f2cadcbf8c9af8cc48a2213192320John McCallstatic CharUnits getMaxAtomicAccessSize(CodeGenModule &CGM, 3891e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Triple::ArchType arch) { 3901e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // ARM has 8-byte atomic accesses, but it's not clear whether we 3911e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // want to rely on them here. 3921e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 3931e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // In the default case, just assume that any size up to a pointer is 3941e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // fine given adequate alignment. 3951e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return CharUnits::fromQuantity(CGM.PointerSizeInBytes); 3961e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall} 3971e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 3981e1f4871535f2cadcbf8c9af8cc48a2213192320John McCallnamespace { 3991e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall class PropertyImplStrategy { 4001e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall public: 4011e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall enum StrategyKind { 4021e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall /// The 'native' strategy is to use the architecture's provided 4031e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall /// reads and writes. 4041e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Native, 4051e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4061e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall /// Use objc_setProperty and objc_getProperty. 4071e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall GetSetProperty, 4081e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4091e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall /// Use objc_setProperty for the setter, but use expression 4101e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall /// evaluation for the getter. 4111e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall SetPropertyAndExpressionGet, 4121e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4131e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall /// Use objc_copyStruct. 4141e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall CopyStruct, 4151e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4161e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall /// The 'expression' strategy is to emit normal assignment or 4171e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall /// lvalue-to-rvalue expressions. 4181e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Expression 4191e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall }; 4201e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4211e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall StrategyKind getKind() const { return StrategyKind(Kind); } 4221e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4231e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall bool hasStrongMember() const { return HasStrong; } 4241e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall bool isAtomic() const { return IsAtomic; } 4251e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall bool isCopy() const { return IsCopy; } 4261e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4271e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall CharUnits getIvarSize() const { return IvarSize; } 4281e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall CharUnits getIvarAlignment() const { return IvarAlignment; } 4291e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4301e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall PropertyImplStrategy(CodeGenModule &CGM, 4311e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall const ObjCPropertyImplDecl *propImpl); 4321e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4331e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall private: 4341e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall unsigned Kind : 8; 4351e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall unsigned IsAtomic : 1; 4361e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall unsigned IsCopy : 1; 4371e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall unsigned HasStrong : 1; 4381e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4391e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall CharUnits IvarSize; 4401e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall CharUnits IvarAlignment; 4411e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall }; 4421e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall} 4431e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4441e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall/// Pick an implementation strategy for the the given property synthesis. 4451e1f4871535f2cadcbf8c9af8cc48a2213192320John McCallPropertyImplStrategy::PropertyImplStrategy(CodeGenModule &CGM, 4461e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall const ObjCPropertyImplDecl *propImpl) { 4471e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall const ObjCPropertyDecl *prop = propImpl->getPropertyDecl(); 448265941bc308d65cc270d5c4de5806f37ce405606John McCall ObjCPropertyDecl::SetterKind setterKind = prop->getSetterKind(); 4491e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 450265941bc308d65cc270d5c4de5806f37ce405606John McCall IsCopy = (setterKind == ObjCPropertyDecl::Copy); 451265941bc308d65cc270d5c4de5806f37ce405606John McCall IsAtomic = prop->isAtomic(); 4521e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall HasStrong = false; // doesn't matter here. 4531e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4541e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Evaluate the ivar's size and alignment. 4551e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall ObjCIvarDecl *ivar = propImpl->getPropertyIvarDecl(); 4561e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall QualType ivarType = ivar->getType(); 4571e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::tie(IvarSize, IvarAlignment) 4581e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall = CGM.getContext().getTypeInfoInChars(ivarType); 4591e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4601e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // If we have a copy property, we always have to use getProperty/setProperty. 461265941bc308d65cc270d5c4de5806f37ce405606John McCall // TODO: we could actually use setProperty and an expression for non-atomics. 4621e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (IsCopy) { 4631e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Kind = GetSetProperty; 4641e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 4651e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 4661e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 467265941bc308d65cc270d5c4de5806f37ce405606John McCall // Handle retain. 468265941bc308d65cc270d5c4de5806f37ce405606John McCall if (setterKind == ObjCPropertyDecl::Retain) { 4691e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // In GC-only, there's nothing special that needs to be done. 470e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor if (CGM.getLangOptions().getGC() == LangOptions::GCOnly) { 4711e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // fallthrough 4721e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4731e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // In ARC, if the property is non-atomic, use expression emission, 4741e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // which translates to objc_storeStrong. This isn't required, but 4751e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // it's slightly nicer. 4761e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } else if (CGM.getLangOptions().ObjCAutoRefCount && !IsAtomic) { 4771e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Kind = Expression; 4781e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 4791e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4801e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Otherwise, we need to at least use setProperty. However, if 4811e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // the property isn't atomic, we can use normal expression 4821e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // emission for the getter. 4831e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } else if (!IsAtomic) { 4841e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Kind = SetPropertyAndExpressionGet; 4851e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 4861e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4871e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Otherwise, we have to use both setProperty and getProperty. 4881e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } else { 4891e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Kind = GetSetProperty; 4901e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 4911e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 4921e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 4931e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 4941e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // If we're not atomic, just use expression accesses. 4951e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (!IsAtomic) { 4961e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Kind = Expression; 4971e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 4981e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 4991e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5005889c60d19101156a3a54b8c49bcc60a12cc1fdbJohn McCall // Properties on bitfield ivars need to be emitted using expression 5015889c60d19101156a3a54b8c49bcc60a12cc1fdbJohn McCall // accesses even if they're nominally atomic. 5025889c60d19101156a3a54b8c49bcc60a12cc1fdbJohn McCall if (ivar->isBitField()) { 5035889c60d19101156a3a54b8c49bcc60a12cc1fdbJohn McCall Kind = Expression; 5045889c60d19101156a3a54b8c49bcc60a12cc1fdbJohn McCall return; 5055889c60d19101156a3a54b8c49bcc60a12cc1fdbJohn McCall } 5065889c60d19101156a3a54b8c49bcc60a12cc1fdbJohn McCall 5071e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // GC-qualified or ARC-qualified ivars need to be emitted as 5081e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // expressions. This actually works out to being atomic anyway, 5091e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // except for ARC __strong, but that should trigger the above code. 5101e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (ivarType.hasNonTrivialObjCLifetime() || 511e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor (CGM.getLangOptions().getGC() && 5121e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall CGM.getContext().getObjCGCAttrKind(ivarType))) { 5131e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Kind = Expression; 5141e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 5151e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 5161e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5171e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Compute whether the ivar has strong members. 518e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor if (CGM.getLangOptions().getGC()) 5191e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (const RecordType *recordType = ivarType->getAs<RecordType>()) 5201e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall HasStrong = recordType->getDecl()->hasObjectMember(); 5211e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5221e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // We can never access structs with object members with a native 5231e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // access, because we need to use write barriers. This is what 5241e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // objc_copyStruct is for. 5251e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (HasStrong) { 5261e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Kind = CopyStruct; 5271e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 5281e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 5291e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5301e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Otherwise, this is target-dependent and based on the size and 5311e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // alignment of the ivar. 532c5d9a90b3a3c16324e0cceeccec3d2993888deb6John McCall 533c5d9a90b3a3c16324e0cceeccec3d2993888deb6John McCall // If the size of the ivar is not a power of two, give up. We don't 534c5d9a90b3a3c16324e0cceeccec3d2993888deb6John McCall // want to get into the business of doing compare-and-swaps. 535c5d9a90b3a3c16324e0cceeccec3d2993888deb6John McCall if (!IvarSize.isPowerOfTwo()) { 536c5d9a90b3a3c16324e0cceeccec3d2993888deb6John McCall Kind = CopyStruct; 537c5d9a90b3a3c16324e0cceeccec3d2993888deb6John McCall return; 538c5d9a90b3a3c16324e0cceeccec3d2993888deb6John McCall } 539c5d9a90b3a3c16324e0cceeccec3d2993888deb6John McCall 5401e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Triple::ArchType arch = 5411e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall CGM.getContext().getTargetInfo().getTriple().getArch(); 5421e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5431e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Most architectures require memory to fit within a single cache 5441e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // line, so the alignment has to be at least the size of the access. 5451e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Otherwise we have to grab a lock. 5461e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (IvarAlignment < IvarSize && !hasUnalignedAtomics(arch)) { 5471e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Kind = CopyStruct; 5481e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 5491e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 5501e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5511e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // If the ivar's size exceeds the architecture's maximum atomic 5521e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // access size, we have to use CopyStruct. 5531e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (IvarSize > getMaxAtomicAccessSize(CGM, arch)) { 5541e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Kind = CopyStruct; 5551e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 5561e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 5571e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5581e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Otherwise, we can use native loads and stores. 5591e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Kind = Native; 5601e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall} 561af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 562af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar/// GenerateObjCGetter - Generate an Objective-C property getter 563489034cf8bde09360e0089f401b2929597b125d8Steve Naroff/// function. The given Decl must be an ObjCImplementationDecl. @synthesize 564489034cf8bde09360e0089f401b2929597b125d8Steve Naroff/// is illegal within a category. 565fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanianvoid CodeGenFunction::GenerateObjCGetter(ObjCImplementationDecl *IMP, 566fef30b55230064d334a669a065a1c9acdb87cdfeFariborz Jahanian const ObjCPropertyImplDecl *PID) { 567af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar const ObjCPropertyDecl *PD = PID->getPropertyDecl(); 568af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar ObjCMethodDecl *OMD = PD->getGetterMethodDecl(); 569af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar assert(OMD && "Invalid call to generate getter (empty method)"); 5708d3f8979e46f9d0b8735566eabe471db0e1e0e53Devang Patel StartObjCMethod(OMD, IMP->getClassInterface(), PID->getLocStart()); 5711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5721e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall generateObjCGetterBody(IMP, PID); 5731e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5741e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall FinishFunction(); 5751e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall} 5761e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5776c11f0b3106263600af2ea0438ebb372821514aaJohn McCallstatic bool hasTrivialGetExpr(const ObjCPropertyImplDecl *propImpl) { 5786c11f0b3106263600af2ea0438ebb372821514aaJohn McCall const Expr *getter = propImpl->getGetterCXXConstructor(); 5791e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (!getter) return true; 5801e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5811e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Sema only makes only of these when the ivar has a C++ class type, 5821e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // so the form is pretty constrained. 5831e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5846c11f0b3106263600af2ea0438ebb372821514aaJohn McCall // If the property has a reference type, we might just be binding a 5856c11f0b3106263600af2ea0438ebb372821514aaJohn McCall // reference, in which case the result will be a gl-value. We should 5866c11f0b3106263600af2ea0438ebb372821514aaJohn McCall // treat this as a non-trivial operation. 5876c11f0b3106263600af2ea0438ebb372821514aaJohn McCall if (getter->isGLValue()) 5886c11f0b3106263600af2ea0438ebb372821514aaJohn McCall return false; 5896c11f0b3106263600af2ea0438ebb372821514aaJohn McCall 5901e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // If we selected a trivial copy-constructor, we're okay. 5911e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (const CXXConstructExpr *construct = dyn_cast<CXXConstructExpr>(getter)) 5921e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return (construct->getConstructor()->isTrivial()); 5931e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 5941e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // The constructor might require cleanups (in which case it's never 5951e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // trivial). 5961e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall assert(isa<ExprWithCleanups>(getter)); 5971e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return false; 5981e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall} 5991e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6001e1f4871535f2cadcbf8c9af8cc48a2213192320John McCallvoid 6011e1f4871535f2cadcbf8c9af8cc48a2213192320John McCallCodeGenFunction::generateObjCGetterBody(const ObjCImplementationDecl *classImpl, 6021e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall const ObjCPropertyImplDecl *propImpl) { 6031e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // If there's a non-trivial 'get' expression, we just have to emit that. 6041e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (!hasTrivialGetExpr(propImpl)) { 6051e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall ReturnStmt ret(SourceLocation(), propImpl->getGetterCXXConstructor(), 6061e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall /*nrvo*/ 0); 6071e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall EmitReturnStmt(ret); 6081e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 6091e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 6101e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6111e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall const ObjCPropertyDecl *prop = propImpl->getPropertyDecl(); 6121e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall QualType propType = prop->getType(); 6131e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall ObjCMethodDecl *getterMethod = prop->getGetterMethodDecl(); 6141e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6151e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall ObjCIvarDecl *ivar = propImpl->getPropertyIvarDecl(); 6161e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6171e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Pick an implementation strategy. 6181e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall PropertyImplStrategy strategy(CGM, propImpl); 6191e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall switch (strategy.getKind()) { 6201e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall case PropertyImplStrategy::Native: { 6211e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), ivar, 0); 6221e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6231e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Currently, all atomic accesses have to be through integer 6241e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // types, so there's no point in trying to pick a prettier type. 6251e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Type *bitcastType = 6261e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Type::getIntNTy(getLLVMContext(), 6271e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall getContext().toBits(strategy.getIvarSize())); 6281e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall bitcastType = bitcastType->getPointerTo(); // addrspace 0 okay 6291e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6301e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Perform an atomic load. This does not impose ordering constraints. 6311e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Value *ivarAddr = LV.getAddress(); 6321e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall ivarAddr = Builder.CreateBitCast(ivarAddr, bitcastType); 6331e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::LoadInst *load = Builder.CreateLoad(ivarAddr, "load"); 6341e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall load->setAlignment(strategy.getIvarAlignment().getQuantity()); 6351e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall load->setAtomic(llvm::Unordered); 6361e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6371e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Store that value into the return address. Doing this with a 6381e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // bitcast is likely to produce some pretty ugly IR, but it's not 6391e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // the *most* terrible thing in the world. 6401e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Builder.CreateStore(load, Builder.CreateBitCast(ReturnValue, bitcastType)); 6411e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6421e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Make sure we don't do an autorelease. 6431e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall AutoreleaseResult = false; 6441e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 6451e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 6461e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6471e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall case PropertyImplStrategy::GetSetProperty: { 6481e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Value *getPropertyFn = 6491e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall CGM.getObjCRuntime().GetPropertyGetFunction(); 6501e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (!getPropertyFn) { 6511e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall CGM.ErrorUnsupported(propImpl, "Obj-C getter requiring atomic copy"); 652c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar return; 653c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar } 654c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar 655c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar // Return (ivar-type) objc_getProperty((id) self, _cmd, offset, true). 656c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar // FIXME: Can't this be simpler? This might even be worse than the 657c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar // corresponding gcc code. 6581e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Value *cmd = 6591e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Builder.CreateLoad(LocalDeclMap[getterMethod->getCmdDecl()], "cmd"); 6601e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Value *self = Builder.CreateBitCast(LoadObjCSelf(), VoidPtrTy); 6611e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Value *ivarOffset = 6621e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall EmitIvarOffset(classImpl->getClassInterface(), ivar); 6631e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6641e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall CallArgList args; 6651e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall args.add(RValue::get(self), getContext().getObjCIdType()); 6661e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall args.add(RValue::get(cmd), getContext().getObjCSelType()); 6671e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall args.add(RValue::get(ivarOffset), getContext().getPointerDiffType()); 668265941bc308d65cc270d5c4de5806f37ce405606John McCall args.add(RValue::get(Builder.getInt1(strategy.isAtomic())), 669265941bc308d65cc270d5c4de5806f37ce405606John McCall getContext().BoolTy); 6701e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 671e4be5a66072f7c7618071284c8d2a9c6d8e691cfDaniel Dunbar // FIXME: We shouldn't need to get the function info here, the 672e4be5a66072f7c7618071284c8d2a9c6d8e691cfDaniel Dunbar // runtime already should have computed it to build the function. 6731e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall RValue RV = EmitCall(getTypes().getFunctionInfo(propType, args, 67441bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall FunctionType::ExtInfo()), 6751e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall getPropertyFn, ReturnValueSlot(), args); 6761e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 677c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar // We need to fix the type here. Ivars with copy & retain are 678c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar // always objects so we don't need to worry about complex or 679c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar // aggregates. 6801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump RV = RValue::get(Builder.CreateBitCast(RV.getScalarVal(), 6811e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall getTypes().ConvertType(propType))); 6821e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6831e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall EmitReturnOfRValue(RV, propType); 684f85e193739c953358c865005855253af4f68a497John McCall 685f85e193739c953358c865005855253af4f68a497John McCall // objc_getProperty does an autorelease, so we should suppress ours. 686f85e193739c953358c865005855253af4f68a497John McCall AutoreleaseResult = false; 6871e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6881e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 6891e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 6901e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6911e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall case PropertyImplStrategy::CopyStruct: 6921e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall emitStructGetterCall(*this, ivar, strategy.isAtomic(), 6931e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall strategy.hasStrongMember()); 6941e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 6951e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 6961e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall case PropertyImplStrategy::Expression: 6971e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall case PropertyImplStrategy::SetPropertyAndExpressionGet: { 6981e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), ivar, 0); 6991e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 7001e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall QualType ivarType = ivar->getType(); 7011e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (ivarType->isAnyComplexType()) { 7021e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall ComplexPairTy pair = LoadComplexFromAddr(LV.getAddress(), 7031b23fe61cf4437668280212d0ad6cb7196f51529Fariborz Jahanian LV.isVolatileQualified()); 7041e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall StoreComplexToAddr(pair, ReturnValue, LV.isVolatileQualified()); 7051e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } else if (hasAggregateLLVMType(ivarType)) { 7061e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // The return value slot is guaranteed to not be aliased, but 7071e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // that's not necessarily the same as "on the stack", so 7081e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // we still potentially need objc_memmove_collectable. 7091e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall EmitAggregateCopy(ReturnValue, LV.getAddress(), ivarType); 710ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall } else { 711ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall llvm::Value *value; 712ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall if (propType->isReferenceType()) { 713ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall value = LV.getAddress(); 714ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall } else { 715ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall // We want to load and autoreleaseReturnValue ARC __weak ivars. 716ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall if (LV.getQuals().getObjCLifetime() == Qualifiers::OCL_Weak) { 7171e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall value = emitARCRetainLoadOfScalar(*this, LV, ivarType); 718ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall 719ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall // Otherwise we want to do a simple load, suppressing the 720ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall // final autorelease. 721f85e193739c953358c865005855253af4f68a497John McCall } else { 722ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall value = EmitLoadOfLValue(LV).getScalarVal(); 723ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall AutoreleaseResult = false; 72414086764e340267e17803d0f8243070ffae2c76eFariborz Jahanian } 725f85e193739c953358c865005855253af4f68a497John McCall 726ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall value = Builder.CreateBitCast(value, ConvertType(propType)); 727ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall } 728ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall 729ba3dd902d1cde09776a50c1adf2cd40bf0a15a7fJohn McCall EmitReturnOfRValue(RValue::get(value), propType); 730ed1d29d62595a83ccf6ef23eb2759d355206df2eFariborz Jahanian } 7311e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 732c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar } 733af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 7341e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 7351e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm_unreachable("bad @property implementation strategy!"); 736af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar} 737af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 73841bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall/// emitStructSetterCall - Call the runtime function to store the value 73941bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall/// from the first formal parameter into the given ivar. 74041bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCallstatic void emitStructSetterCall(CodeGenFunction &CGF, ObjCMethodDecl *OMD, 74141bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall ObjCIvarDecl *ivar) { 7422846b97965e980ad2e7c8d444b82cc21d733a699Fariborz Jahanian // objc_copyStruct (&structIvar, &Arg, 7432846b97965e980ad2e7c8d444b82cc21d733a699Fariborz Jahanian // sizeof (struct something), true, false); 744bbb253c307bc98fea5af9c9e59003e1c0da4cdc2John McCall CallArgList args; 745bbb253c307bc98fea5af9c9e59003e1c0da4cdc2John McCall 746bbb253c307bc98fea5af9c9e59003e1c0da4cdc2John McCall // The first argument is the address of the ivar. 74741bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall llvm::Value *ivarAddr = CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), 74841bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall CGF.LoadObjCSelf(), ivar, 0) 74941bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall .getAddress(); 75041bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall ivarAddr = CGF.Builder.CreateBitCast(ivarAddr, CGF.Int8PtrTy); 75141bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall args.add(RValue::get(ivarAddr), CGF.getContext().VoidPtrTy); 752bbb253c307bc98fea5af9c9e59003e1c0da4cdc2John McCall 753bbb253c307bc98fea5af9c9e59003e1c0da4cdc2John McCall // The second argument is the address of the parameter variable. 75441bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall ParmVarDecl *argVar = *OMD->param_begin(); 75541bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall DeclRefExpr argRef(argVar, argVar->getType(), VK_LValue, SourceLocation()); 75641bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall llvm::Value *argAddr = CGF.EmitLValue(&argRef).getAddress(); 75741bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall argAddr = CGF.Builder.CreateBitCast(argAddr, CGF.Int8PtrTy); 75841bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall args.add(RValue::get(argAddr), CGF.getContext().VoidPtrTy); 759bbb253c307bc98fea5af9c9e59003e1c0da4cdc2John McCall 760bbb253c307bc98fea5af9c9e59003e1c0da4cdc2John McCall // The third argument is the sizeof the type. 761bbb253c307bc98fea5af9c9e59003e1c0da4cdc2John McCall llvm::Value *size = 76241bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall CGF.CGM.getSize(CGF.getContext().getTypeSizeInChars(ivar->getType())); 76341bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall args.add(RValue::get(size), CGF.getContext().getSizeType()); 76441bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall 76541bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall // The fourth argument is the 'isAtomic' flag. 76641bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall args.add(RValue::get(CGF.Builder.getTrue()), CGF.getContext().BoolTy); 767bbb253c307bc98fea5af9c9e59003e1c0da4cdc2John McCall 76841bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall // The fifth argument is the 'hasStrong' flag. 76941bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall // FIXME: should this really always be false? 77041bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall args.add(RValue::get(CGF.Builder.getFalse()), CGF.getContext().BoolTy); 771bbb253c307bc98fea5af9c9e59003e1c0da4cdc2John McCall 77241bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall llvm::Value *copyStructFn = CGF.CGM.getObjCRuntime().GetSetStructFunction(); 77341bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall CGF.EmitCall(CGF.getTypes().getFunctionInfo(CGF.getContext().VoidTy, args, 77441bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall FunctionType::ExtInfo()), 77541bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall copyStructFn, ReturnValueSlot(), args); 7762846b97965e980ad2e7c8d444b82cc21d733a699Fariborz Jahanian} 7772846b97965e980ad2e7c8d444b82cc21d733a699Fariborz Jahanian 7781e1f4871535f2cadcbf8c9af8cc48a2213192320John McCallstatic bool hasTrivialSetExpr(const ObjCPropertyImplDecl *PID) { 7791e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall Expr *setter = PID->getSetterCXXAssignment(); 7801e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (!setter) return true; 7811e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 7821e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Sema only makes only of these when the ivar has a C++ class type, 7831e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // so the form is pretty constrained. 78471c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 78571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall // An operator call is trivial if the function it calls is trivial. 7861e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // This also implies that there's nothing non-trivial going on with 7871e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // the arguments, because operator= can only be trivial if it's a 7881e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // synthesized assignment operator and therefore both parameters are 7891e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // references. 7901e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (CallExpr *call = dyn_cast<CallExpr>(setter)) { 79171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall if (const FunctionDecl *callee 79271c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall = dyn_cast_or_null<FunctionDecl>(call->getCalleeDecl())) 79371c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall if (callee->isTrivial()) 79471c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall return true; 79571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall return false; 79601cb307f0b84a368cdbc0738d6680aab8ed7423fFariborz Jahanian } 79771c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 7981e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall assert(isa<ExprWithCleanups>(setter)); 79971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall return false; 80071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall} 80186957eb200492e95a09bce1b2c76f66345468f84Daniel Dunbar 80271c758d3f4ecc8b511e6ae4a7210486aa994c182John McCallvoid 80371c758d3f4ecc8b511e6ae4a7210486aa994c182John McCallCodeGenFunction::generateObjCSetterBody(const ObjCImplementationDecl *classImpl, 80471c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall const ObjCPropertyImplDecl *propImpl) { 80571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall // Just use the setter expression if Sema gave us one and it's 80671c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall // non-trivial. There's no way to do this atomically. 8071e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall if (!hasTrivialSetExpr(propImpl)) { 80871c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall EmitStmt(propImpl->getSetterCXXAssignment()); 80971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall return; 81071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall } 81171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 81271c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall const ObjCPropertyDecl *prop = propImpl->getPropertyDecl(); 81371c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall ObjCIvarDecl *ivar = propImpl->getPropertyIvarDecl(); 81471c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall ObjCMethodDecl *setterMethod = prop->getSetterMethodDecl(); 81571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 8161e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall PropertyImplStrategy strategy(CGM, propImpl); 8171e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall switch (strategy.getKind()) { 8181e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall case PropertyImplStrategy::Native: { 8191e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Value *argAddr = LocalDeclMap[*setterMethod->param_begin()]; 82071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 8211e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall LValue ivarLValue = 8221e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), ivar, /*quals*/ 0); 8231e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Value *ivarAddr = ivarLValue.getAddress(); 8241e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 8251e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Currently, all atomic accesses have to be through integer 8261e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // types, so there's no point in trying to pick a prettier type. 8271e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Type *bitcastType = 8281e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Type::getIntNTy(getLLVMContext(), 8291e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall getContext().toBits(strategy.getIvarSize())); 8301e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall bitcastType = bitcastType->getPointerTo(); // addrspace 0 okay 8311e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 8321e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Cast both arguments to the chosen operation type. 8331e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall argAddr = Builder.CreateBitCast(argAddr, bitcastType); 8341e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall ivarAddr = Builder.CreateBitCast(ivarAddr, bitcastType); 83571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 8361e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // This bitcast load is likely to cause some nasty IR. 8371e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::Value *load = Builder.CreateLoad(argAddr); 8381e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 8391e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall // Perform an atomic store. There are no memory ordering requirements. 8401e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall llvm::StoreInst *store = Builder.CreateStore(load, ivarAddr); 8411e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall store->setAlignment(strategy.getIvarAlignment().getQuantity()); 8421e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall store->setAtomic(llvm::Unordered); 8431e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall return; 8441e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall } 8451e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 8461e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall case PropertyImplStrategy::GetSetProperty: 8471e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall case PropertyImplStrategy::SetPropertyAndExpressionGet: { 84871c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall llvm::Value *setPropertyFn = 84971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall CGM.getObjCRuntime().GetPropertySetFunction(); 85071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall if (!setPropertyFn) { 85171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall CGM.ErrorUnsupported(propImpl, "Obj-C setter requiring atomic copy"); 85286957eb200492e95a09bce1b2c76f66345468f84Daniel Dunbar return; 85386957eb200492e95a09bce1b2c76f66345468f84Daniel Dunbar } 8541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Emit objc_setProperty((id) self, _cmd, offset, arg, 85686957eb200492e95a09bce1b2c76f66345468f84Daniel Dunbar // <is-atomic>, <is-copy>). 85771c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall llvm::Value *cmd = 85871c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall Builder.CreateLoad(LocalDeclMap[setterMethod->getCmdDecl()]); 85971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall llvm::Value *self = 86071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall Builder.CreateBitCast(LoadObjCSelf(), VoidPtrTy); 86171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall llvm::Value *ivarOffset = 86271c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall EmitIvarOffset(classImpl->getClassInterface(), ivar); 86371c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall llvm::Value *arg = LocalDeclMap[*setterMethod->param_begin()]; 86471c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall arg = Builder.CreateBitCast(Builder.CreateLoad(arg, "arg"), VoidPtrTy); 86571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 86671c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall CallArgList args; 86771c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall args.add(RValue::get(self), getContext().getObjCIdType()); 86871c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall args.add(RValue::get(cmd), getContext().getObjCSelType()); 86971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall args.add(RValue::get(ivarOffset), getContext().getPointerDiffType()); 87071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall args.add(RValue::get(arg), getContext().getObjCIdType()); 8711e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall args.add(RValue::get(Builder.getInt1(strategy.isAtomic())), 8721e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall getContext().BoolTy); 8731e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall args.add(RValue::get(Builder.getInt1(strategy.isCopy())), 8741e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall getContext().BoolTy); 875f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: We shouldn't need to get the function info here, the runtime 876f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // already should have computed it to build the function. 87771c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall EmitCall(getTypes().getFunctionInfo(getContext().VoidTy, args, 87871c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall FunctionType::ExtInfo()), 87971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall setPropertyFn, ReturnValueSlot(), args); 88071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall return; 88171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall } 88271c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 8831e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall case PropertyImplStrategy::CopyStruct: 88441bdde9e961c4d96a94148f20f0b18397f4358ddJohn McCall emitStructSetterCall(*this, setterMethod, ivar); 88571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall return; 8861e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall 8871e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall case PropertyImplStrategy::Expression: 8881e1f4871535f2cadcbf8c9af8cc48a2213192320John McCall break; 88971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall } 89071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 89171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall // Otherwise, fake up some ASTs and emit a normal assignment. 89271c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall ValueDecl *selfDecl = setterMethod->getSelfDecl(); 89371c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall DeclRefExpr self(selfDecl, selfDecl->getType(), VK_LValue, SourceLocation()); 89471c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall ImplicitCastExpr selfLoad(ImplicitCastExpr::OnStack, 89571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall selfDecl->getType(), CK_LValueToRValue, &self, 89671c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall VK_RValue); 89771c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall ObjCIvarRefExpr ivarRef(ivar, ivar->getType().getNonReferenceType(), 89871c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall SourceLocation(), &selfLoad, true, true); 89971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 90071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall ParmVarDecl *argDecl = *setterMethod->param_begin(); 90171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall QualType argType = argDecl->getType().getNonReferenceType(); 90271c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall DeclRefExpr arg(argDecl, argType, VK_LValue, SourceLocation()); 90371c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall ImplicitCastExpr argLoad(ImplicitCastExpr::OnStack, 90471c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall argType.getUnqualifiedType(), CK_LValueToRValue, 90571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall &arg, VK_RValue); 90645e8423d7dcea657c14c55347e8a30ac904d7501Daniel Dunbar 90771c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall // The property type can differ from the ivar type in some situations with 90871c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall // Objective-C pointer types, we can always bit cast the RHS in these cases. 90971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall // The following absurdity is just to ensure well-formed IR. 91071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall CastKind argCK = CK_NoOp; 91171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall if (ivarRef.getType()->isObjCObjectPointerType()) { 91271c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall if (argLoad.getType()->isObjCObjectPointerType()) 91371c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall argCK = CK_BitCast; 91471c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall else if (argLoad.getType()->isBlockPointerType()) 91571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall argCK = CK_BlockPointerToObjCPointerCast; 91671c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall else 91771c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall argCK = CK_CPointerToObjCPointerCast; 91871c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall } else if (ivarRef.getType()->isBlockPointerType()) { 91971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall if (argLoad.getType()->isBlockPointerType()) 92071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall argCK = CK_BitCast; 92171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall else 92271c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall argCK = CK_AnyPointerToBlockPointerCast; 92371c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall } else if (ivarRef.getType()->isPointerType()) { 92471c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall argCK = CK_BitCast; 92586957eb200492e95a09bce1b2c76f66345468f84Daniel Dunbar } 92671c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall ImplicitCastExpr argCast(ImplicitCastExpr::OnStack, 92771c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall ivarRef.getType(), argCK, &argLoad, 92871c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall VK_RValue); 92971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall Expr *finalArg = &argLoad; 93071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall if (!getContext().hasSameUnqualifiedType(ivarRef.getType(), 93171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall argLoad.getType())) 93271c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall finalArg = &argCast; 93371c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 93471c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 93571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall BinaryOperator assign(&ivarRef, finalArg, BO_Assign, 93671c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall ivarRef.getType(), VK_RValue, OK_Ordinary, 93771c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall SourceLocation()); 93871c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall EmitStmt(&assign); 93971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall} 94071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 94171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall/// GenerateObjCSetter - Generate an Objective-C property setter 94271c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall/// function. The given Decl must be an ObjCImplementationDecl. @synthesize 94371c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall/// is illegal within a category. 94471c758d3f4ecc8b511e6ae4a7210486aa994c182John McCallvoid CodeGenFunction::GenerateObjCSetter(ObjCImplementationDecl *IMP, 94571c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall const ObjCPropertyImplDecl *PID) { 94671c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall const ObjCPropertyDecl *PD = PID->getPropertyDecl(); 94771c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall ObjCMethodDecl *OMD = PD->getSetterMethodDecl(); 94871c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall assert(OMD && "Invalid call to generate setter (empty method)"); 94971c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall StartObjCMethod(OMD, IMP->getClassInterface(), PID->getLocStart()); 95071c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall 95171c758d3f4ecc8b511e6ae4a7210486aa994c182John McCall generateObjCSetterBody(IMP, PID); 952af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar 953af05bb9073319d8381b71c4325188853fd4b8ed6Daniel Dunbar FinishFunction(); 9544111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner} 9554111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner 956e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCallnamespace { 9579928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall struct DestroyIvar : EHScopeStack::Cleanup { 9589928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall private: 9599928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall llvm::Value *addr; 960e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall const ObjCIvarDecl *ivar; 9619928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall CodeGenFunction::Destroyer &destroyer; 9629928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall bool useEHCleanupForArray; 9639928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall public: 9649928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall DestroyIvar(llvm::Value *addr, const ObjCIvarDecl *ivar, 9659928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall CodeGenFunction::Destroyer *destroyer, 9669928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall bool useEHCleanupForArray) 9679928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall : addr(addr), ivar(ivar), destroyer(*destroyer), 9689928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall useEHCleanupForArray(useEHCleanupForArray) {} 969e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 970ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 9719928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall LValue lvalue 9729928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall = CGF.EmitLValueForIvar(CGF.TypeOfSelfObject(), addr, ivar, /*CVR*/ 0); 9739928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall CGF.emitDestroy(lvalue.getAddress(), ivar->getType(), destroyer, 974ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall flags.isForNormalCleanup() && useEHCleanupForArray); 975e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall } 976e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall }; 977e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall} 978e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 9799928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall/// Like CodeGenFunction::destroyARCStrong, but do it with a call. 9809928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCallstatic void destroyARCStrongWithStore(CodeGenFunction &CGF, 9819928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall llvm::Value *addr, 9829928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall QualType type) { 9839928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall llvm::Value *null = getNullForVariable(addr); 9849928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall CGF.EmitARCStoreStrongCall(addr, null, /*ignored*/ true); 9859928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall} 986f85e193739c953358c865005855253af4f68a497John McCall 987e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCallstatic void emitCXXDestructMethod(CodeGenFunction &CGF, 988e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ObjCImplementationDecl *impl) { 989e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall CodeGenFunction::RunCleanupsScope scope(CGF); 990e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 991e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall llvm::Value *self = CGF.LoadObjCSelf(); 992e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 993db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose const ObjCInterfaceDecl *iface = impl->getClassInterface(); 994db8264e4c5ffd7af6fbad4ca4306bd382bb02691Jordy Rose for (const ObjCIvarDecl *ivar = iface->all_declared_ivar_begin(); 995e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall ivar; ivar = ivar->getNextIvar()) { 996e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall QualType type = ivar->getType(); 997e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 998e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // Check whether the ivar is a destructible type. 9999928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall QualType::DestructionKind dtorKind = type.isDestructedType(); 10009928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall if (!dtorKind) continue; 10019928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall 10029928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall CodeGenFunction::Destroyer *destroyer = 0; 10039928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall 10049928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall // Use a call to objc_storeStrong to destroy strong ivars, for the 10059928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall // general benefit of the tools. 10069928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall if (dtorKind == QualType::DK_objc_strong_lifetime) { 10079928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall destroyer = &destroyARCStrongWithStore; 10089928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall 10099928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall // Otherwise use the default for the destruction kind. 10109928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall } else { 10119928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall destroyer = &CGF.getDestroyer(dtorKind); 1012e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall } 10139928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall 10149928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall CleanupKind cleanupKind = CGF.getCleanupKind(dtorKind); 10159928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall 10169928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall CGF.EHStack.pushCleanup<DestroyIvar>(cleanupKind, self, ivar, destroyer, 10179928c4805aa8d5fabd488d0d0c5aeb64fd50f0e3John McCall cleanupKind & EHCleanup); 1018e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall } 1019e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 1020e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall assert(scope.requiresCleanups() && "nothing to do in .cxx_destruct?"); 1021e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall} 1022e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 1023109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanianvoid CodeGenFunction::GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP, 1024109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCMethodDecl *MD, 1025109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian bool ctor) { 1026109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian MD->createImplicitParams(CGM.getContext(), IMP->getClassInterface()); 10278d3f8979e46f9d0b8735566eabe471db0e1e0e53Devang Patel StartObjCMethod(MD, IMP->getClassInterface(), MD->getLocStart()); 1028e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 1029e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // Emit .cxx_construct. 1030109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian if (ctor) { 1031f85e193739c953358c865005855253af4f68a497John McCall // Suppress the final autorelease in ARC. 1032f85e193739c953358c865005855253af4f68a497John McCall AutoreleaseResult = false; 1033f85e193739c953358c865005855253af4f68a497John McCall 10345f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<CXXCtorInitializer *, 8> IvarInitializers; 1035e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall for (ObjCImplementationDecl::init_const_iterator B = IMP->init_begin(), 1036e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall E = IMP->init_end(); B != E; ++B) { 1037e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall CXXCtorInitializer *IvarInit = (*B); 103800eb3f9c5b33e3d99aee1f8b75dd9c9678fdd66bFrancois Pichet FieldDecl *Field = IvarInit->getAnyMember(); 1039109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(Field); 10409b4d4fc49f30f1caa35d680702f1921afad81971Fariborz Jahanian LValue LV = EmitLValueForIvar(TypeOfSelfObject(), 10419b4d4fc49f30f1caa35d680702f1921afad81971Fariborz Jahanian LoadObjCSelf(), Ivar, 0); 10427c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall EmitAggExpr(IvarInit->getInit(), 10437c2349be2d11143a2e59a167fd43362a3bf4585eJohn McCall AggValueSlot::forLValue(LV, AggValueSlot::IsDestructed, 1044410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall AggValueSlot::DoesNotNeedGCBarriers, 1045410ffb2bc5f072d58a73c14560345bcf77dec1ccJohn McCall AggValueSlot::IsNotAliased)); 1046109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian } 1047109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian // constructor returns 'self'. 1048109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian CodeGenTypes &Types = CGM.getTypes(); 1049109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian QualType IdTy(CGM.getContext().getObjCIdType()); 1050109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian llvm::Value *SelfAsId = 1051109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian Builder.CreateBitCast(LoadObjCSelf(), Types.ConvertType(IdTy)); 1052109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian EmitReturnOfRValue(RValue::get(SelfAsId), IdTy); 1053e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall 1054e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall // Emit .cxx_destruct. 1055bc397cf90355f17c974b0bdf3960e8fb38caf5d6Chandler Carruth } else { 1056e81ac69c5da9fadfac33ee76e98d5fb558c4e389John McCall emitCXXDestructMethod(*this, IMP); 1057109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian } 1058109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian FinishFunction(); 1059109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian} 1060109dfc6ca6652f60c55ed0f2631aebf323d0200dFariborz Jahanian 10610b2bd47151ee9205ad6c66d1ffb921918106088aFariborz Jahanianbool CodeGenFunction::IndirectObjCSetterArg(const CGFunctionInfo &FI) { 10620b2bd47151ee9205ad6c66d1ffb921918106088aFariborz Jahanian CGFunctionInfo::const_arg_iterator it = FI.arg_begin(); 10630b2bd47151ee9205ad6c66d1ffb921918106088aFariborz Jahanian it++; it++; 10640b2bd47151ee9205ad6c66d1ffb921918106088aFariborz Jahanian const ABIArgInfo &AI = it->info; 10650b2bd47151ee9205ad6c66d1ffb921918106088aFariborz Jahanian // FIXME. Is this sufficient check? 10660b2bd47151ee9205ad6c66d1ffb921918106088aFariborz Jahanian return (AI.getKind() == ABIArgInfo::Indirect); 10670b2bd47151ee9205ad6c66d1ffb921918106088aFariborz Jahanian} 10680b2bd47151ee9205ad6c66d1ffb921918106088aFariborz Jahanian 106915bd58842adaa4f8cca4e58047ed18e033858d9bFariborz Jahanianbool CodeGenFunction::IvarTypeWithAggrGCObjects(QualType Ty) { 1070e289d81369914678db386f6aa86faf8f178e245dDouglas Gregor if (CGM.getLangOptions().getGC() == LangOptions::NonGC) 107115bd58842adaa4f8cca4e58047ed18e033858d9bFariborz Jahanian return false; 107215bd58842adaa4f8cca4e58047ed18e033858d9bFariborz Jahanian if (const RecordType *FDTTy = Ty.getTypePtr()->getAs<RecordType>()) 107315bd58842adaa4f8cca4e58047ed18e033858d9bFariborz Jahanian return FDTTy->getDecl()->hasObjectMember(); 107415bd58842adaa4f8cca4e58047ed18e033858d9bFariborz Jahanian return false; 107515bd58842adaa4f8cca4e58047ed18e033858d9bFariborz Jahanian} 107615bd58842adaa4f8cca4e58047ed18e033858d9bFariborz Jahanian 1077c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbarllvm::Value *CodeGenFunction::LoadObjCSelf() { 1078b7ec246872b412f0e7bb9e93eacfd78cfa6adfb3Daniel Dunbar const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); 1079b7ec246872b412f0e7bb9e93eacfd78cfa6adfb3Daniel Dunbar return Builder.CreateLoad(LocalDeclMap[OMD->getSelfDecl()], "self"); 10804111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner} 10814111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner 108245012a7ef5abf1042c893f3f2fa5c23cb5485ea9Fariborz JahanianQualType CodeGenFunction::TypeOfSelfObject() { 108345012a7ef5abf1042c893f3f2fa5c23cb5485ea9Fariborz Jahanian const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl); 108445012a7ef5abf1042c893f3f2fa5c23cb5485ea9Fariborz Jahanian ImplicitParamDecl *selfDecl = OMD->getSelfDecl(); 108514108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff const ObjCObjectPointerType *PTy = cast<ObjCObjectPointerType>( 108614108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff getContext().getCanonicalType(selfDecl->getType())); 108745012a7ef5abf1042c893f3f2fa5c23cb5485ea9Fariborz Jahanian return PTy->getPointeeType(); 108845012a7ef5abf1042c893f3f2fa5c23cb5485ea9Fariborz Jahanian} 108945012a7ef5abf1042c893f3f2fa5c23cb5485ea9Fariborz Jahanian 1090e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCallLValue 1091e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCallCodeGenFunction::EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E) { 1092e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall // This is a special l-value that just issues sends when we load or 1093e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall // store through it. 1094e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall 1095e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall // For certain base kinds, we need to emit the base immediately. 1096e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall llvm::Value *Base; 1097e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall if (E->isSuperReceiver()) 1098e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall Base = LoadObjCSelf(); 1099e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall else if (E->isClassReceiver()) 1100e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall Base = CGM.getObjCRuntime().GetClass(Builder, E->getClassReceiver()); 1101e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall else 1102e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall Base = EmitScalarExpr(E->getBase()); 1103e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall return LValue::MakePropertyRef(E, Base); 1104e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall} 1105e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall 1106e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCallstatic RValue GenerateMessageSendSuper(CodeGenFunction &CGF, 1107e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall ReturnValueSlot Return, 1108e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall QualType ResultType, 1109e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall Selector S, 1110e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall llvm::Value *Receiver, 1111e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall const CallArgList &CallArgs) { 1112e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CGF.CurFuncDecl); 1113f469557743f77918d2ca8226e2ee2888998ffd4aFariborz Jahanian bool isClassMessage = OMD->isClassMethod(); 1114f469557743f77918d2ca8226e2ee2888998ffd4aFariborz Jahanian bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext()); 1115e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall return CGF.CGM.getObjCRuntime() 1116e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall .GenerateMessageSendSuper(CGF, Return, ResultType, 1117e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall S, OMD->getClassInterface(), 1118e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall isCategoryImpl, Receiver, 1119e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall isClassMessage, CallArgs); 1120f469557743f77918d2ca8226e2ee2888998ffd4aFariborz Jahanian} 1121f469557743f77918d2ca8226e2ee2888998ffd4aFariborz Jahanian 1122119a1c6c4029d30cae7b31a2826aa0ff70d01668John McCallRValue CodeGenFunction::EmitLoadOfPropertyRefLValue(LValue LV, 1123119a1c6c4029d30cae7b31a2826aa0ff70d01668John McCall ReturnValueSlot Return) { 1124119a1c6c4029d30cae7b31a2826aa0ff70d01668John McCall const ObjCPropertyRefExpr *E = LV.getPropertyRefExpr(); 112568af13f3ca39947e3f285f864fe3b76640fddf69Fariborz Jahanian QualType ResultType = E->getGetterResultType(); 112612f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall Selector S; 1127926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor const ObjCMethodDecl *method; 112812f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall if (E->isExplicitProperty()) { 112912f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall const ObjCPropertyDecl *Property = E->getExplicitProperty(); 113012f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall S = Property->getGetterName(); 1131926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor method = Property->getGetterMethodDecl(); 1132b3589f44c5d295cd41de2c83f3475116835eeebdMike Stump } else { 1133926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor method = E->getImplicitPropertyGetter(); 1134926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor S = method->getSelector(); 11355daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian } 113612f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall 1137e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall llvm::Value *Receiver = LV.getPropertyRefBaseAddr(); 1138e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall 1139f85e193739c953358c865005855253af4f68a497John McCall if (CGM.getLangOptions().ObjCAutoRefCount) { 1140f85e193739c953358c865005855253af4f68a497John McCall QualType receiverType; 1141f85e193739c953358c865005855253af4f68a497John McCall if (E->isSuperReceiver()) 1142f85e193739c953358c865005855253af4f68a497John McCall receiverType = E->getSuperReceiverType(); 1143f85e193739c953358c865005855253af4f68a497John McCall else if (E->isClassReceiver()) 1144f85e193739c953358c865005855253af4f68a497John McCall receiverType = getContext().getObjCClassType(); 1145f85e193739c953358c865005855253af4f68a497John McCall else 1146f85e193739c953358c865005855253af4f68a497John McCall receiverType = E->getBase()->getType(); 1147f85e193739c953358c865005855253af4f68a497John McCall } 1148f85e193739c953358c865005855253af4f68a497John McCall 1149e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall // Accesses to 'super' follow a different code path. 115012f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall if (E->isSuperReceiver()) 1151926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor return AdjustRelatedResultType(*this, E, method, 1152926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor GenerateMessageSendSuper(*this, Return, 1153926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor ResultType, 1154926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor S, Receiver, 1155926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor CallArgList())); 1156119a1c6c4029d30cae7b31a2826aa0ff70d01668John McCall const ObjCInterfaceDecl *ReceiverClass 1157119a1c6c4029d30cae7b31a2826aa0ff70d01668John McCall = (E->isClassReceiver() ? E->getClassReceiver() : 0); 1158926df6cfabf3eaa4afc990c097fa4619b76a9b57Douglas Gregor return AdjustRelatedResultType(*this, E, method, 1159f85e193739c953358c865005855253af4f68a497John McCall CGM.getObjCRuntime(). 1160f85e193739c953358c865005855253af4f68a497John McCall GenerateMessageSend(*this, Return, ResultType, S, 1161f85e193739c953358c865005855253af4f68a497John McCall Receiver, CallArgList(), ReceiverClass)); 11629c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar} 11639c3fc703b29a31d40bcf5027dbb4784dd393804eDaniel Dunbar 1164119a1c6c4029d30cae7b31a2826aa0ff70d01668John McCallvoid CodeGenFunction::EmitStoreThroughPropertyRefLValue(RValue Src, 1165119a1c6c4029d30cae7b31a2826aa0ff70d01668John McCall LValue Dst) { 1166119a1c6c4029d30cae7b31a2826aa0ff70d01668John McCall const ObjCPropertyRefExpr *E = Dst.getPropertyRefExpr(); 116712f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall Selector S = E->getSetterSelector(); 116868af13f3ca39947e3f285f864fe3b76640fddf69Fariborz Jahanian QualType ArgType = E->getSetterArgType(); 116968af13f3ca39947e3f285f864fe3b76640fddf69Fariborz Jahanian 1170b19c76e857d21b722d0a207cb45b26d7cb20a73fFariborz Jahanian // FIXME. Other than scalars, AST is not adequate for setter and 1171b19c76e857d21b722d0a207cb45b26d7cb20a73fFariborz Jahanian // getter type mismatches which require conversion. 1172b19c76e857d21b722d0a207cb45b26d7cb20a73fFariborz Jahanian if (Src.isScalar()) { 1173b19c76e857d21b722d0a207cb45b26d7cb20a73fFariborz Jahanian llvm::Value *SrcVal = Src.getScalarVal(); 1174b19c76e857d21b722d0a207cb45b26d7cb20a73fFariborz Jahanian QualType DstType = getContext().getCanonicalType(ArgType); 11752acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *DstTy = ConvertType(DstType); 1176b19c76e857d21b722d0a207cb45b26d7cb20a73fFariborz Jahanian if (SrcVal->getType() != DstTy) 1177b19c76e857d21b722d0a207cb45b26d7cb20a73fFariborz Jahanian Src = 1178b19c76e857d21b722d0a207cb45b26d7cb20a73fFariborz Jahanian RValue::get(EmitScalarConversion(SrcVal, E->getType(), DstType)); 1179b19c76e857d21b722d0a207cb45b26d7cb20a73fFariborz Jahanian } 1180b19c76e857d21b722d0a207cb45b26d7cb20a73fFariborz Jahanian 1181e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall CallArgList Args; 118204c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(Src, ArgType); 1183e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall 1184e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall llvm::Value *Receiver = Dst.getPropertyRefBaseAddr(); 1185e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall QualType ResultType = getContext().VoidTy; 1186e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall 118712f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall if (E->isSuperReceiver()) { 1188e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall GenerateMessageSendSuper(*this, ReturnValueSlot(), 1189e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall ResultType, S, Receiver, Args); 119012f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall return; 119112f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall } 119212f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall 1193119a1c6c4029d30cae7b31a2826aa0ff70d01668John McCall const ObjCInterfaceDecl *ReceiverClass 1194119a1c6c4029d30cae7b31a2826aa0ff70d01668John McCall = (E->isClassReceiver() ? E->getClassReceiver() : 0); 119512f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall 119612f78a6741a4cb3d904340f8d3d2714568b50e7aJohn McCall CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), 1197e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall ResultType, S, Receiver, Args, 1198e68b9842d2d6adc2c72c81c845a2c68e58d9d3a4John McCall ReceiverClass); 119985c59edda02df48fae8dc85049743319bc6e7e89Daniel Dunbar} 120085c59edda02df48fae8dc85049743319bc6e7e89Daniel Dunbar 120174391b48b4791cded373683a3baf67314f358d50Chris Lattnervoid CodeGenFunction::EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S){ 12021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Constant *EnumerationMutationFn = 1203c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar CGM.getObjCRuntime().EnumerationMutationFunction(); 12041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1205c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar if (!EnumerationMutationFn) { 1206c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar CGM.ErrorUnsupported(&S, "Obj-C fast enumeration for this runtime"); 1207c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar return; 1208c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar } 1209c1cf4a579f8a0a77719deedc1b8f850b77d36ecfDaniel Dunbar 1210bcbd03ac0ac0890a436e1a179d3a285e914d41faDevang Patel CGDebugInfo *DI = getDebugInfo(); 121173fb35003aad027492e661a3749e921b5d1ecaf9Eric Christopher if (DI) 121273fb35003aad027492e661a3749e921b5d1ecaf9Eric Christopher DI->EmitLexicalBlockStart(Builder, S.getSourceRange().getBegin()); 1213bcbd03ac0ac0890a436e1a179d3a285e914d41faDevang Patel 12149d99f2db9bccc1664d6bbf1fc5346bab293ec0c3Devang Patel // The local variable comes into scope immediately. 12159d99f2db9bccc1664d6bbf1fc5346bab293ec0c3Devang Patel AutoVarEmission variable = AutoVarEmission::invalid(); 12169d99f2db9bccc1664d6bbf1fc5346bab293ec0c3Devang Patel if (const DeclStmt *SD = dyn_cast<DeclStmt>(S.getElement())) 12179d99f2db9bccc1664d6bbf1fc5346bab293ec0c3Devang Patel variable = EmitAutoVarAlloca(*cast<VarDecl>(SD->getSingleDecl())); 12189d99f2db9bccc1664d6bbf1fc5346bab293ec0c3Devang Patel 1219d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall JumpDest LoopEnd = getJumpDestInCurrentScope("forcoll.end"); 12201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1221f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson // Fast enumeration state. 12220815b579b31cb3129f732bb7ea36fd6ba6949e98Douglas Gregor QualType StateTy = CGM.getObjCFastEnumerationStateType(); 1223195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar llvm::Value *StatePtr = CreateMemTemp(StateTy, "state.ptr"); 12241884eb0b5c55edda4893ddec45e7dbad79758782Anders Carlsson EmitNullInitialization(StatePtr, StateTy); 12251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1226f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson // Number of elements in the items array. 12272abd89c039e835e84519a4cd8a7495899a70153dAnders Carlsson static const unsigned NumItems = 16; 12281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1229d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Fetch the countByEnumeratingWithState:objects:count: selector. 1230ad4688669579d5d7b025137a095be66936d7ea31Benjamin Kramer IdentifierInfo *II[] = { 1231ad4688669579d5d7b025137a095be66936d7ea31Benjamin Kramer &CGM.getContext().Idents.get("countByEnumeratingWithState"), 1232ad4688669579d5d7b025137a095be66936d7ea31Benjamin Kramer &CGM.getContext().Idents.get("objects"), 1233ad4688669579d5d7b025137a095be66936d7ea31Benjamin Kramer &CGM.getContext().Idents.get("count") 1234ad4688669579d5d7b025137a095be66936d7ea31Benjamin Kramer }; 1235ad4688669579d5d7b025137a095be66936d7ea31Benjamin Kramer Selector FastEnumSel = 1236ad4688669579d5d7b025137a095be66936d7ea31Benjamin Kramer CGM.getContext().Selectors.getSelector(llvm::array_lengthof(II), &II[0]); 1237f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 1238f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson QualType ItemsTy = 1239f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson getContext().getConstantArrayType(getContext().getObjCIdType(), 12401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::APInt(32, NumItems), 1241f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson ArrayType::Normal, 0); 1242195337d2e5d4625ae9dc1328c7cdbc7115b0261bDaniel Dunbar llvm::Value *ItemsPtr = CreateMemTemp(ItemsTy, "items.ptr"); 12431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1244990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Emit the collection pointer. In ARC, we do a retain. 1245990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall llvm::Value *Collection; 1246990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (getLangOptions().ObjCAutoRefCount) { 1247990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Collection = EmitARCRetainScalarExpr(S.getCollection()); 1248990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1249990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Enter a cleanup to do the release. 1250990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall EmitObjCConsumeObject(S.getCollection()->getType(), Collection); 1251990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } else { 1252990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall Collection = EmitScalarExpr(S.getCollection()); 1253990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 12541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12554b302d32378b364703b212834f908762e570c29cJohn McCall // The 'continue' label needs to appear within the cleanup for the 12564b302d32378b364703b212834f908762e570c29cJohn McCall // collection object. 12574b302d32378b364703b212834f908762e570c29cJohn McCall JumpDest AfterBody = getJumpDestInCurrentScope("forcoll.next"); 12584b302d32378b364703b212834f908762e570c29cJohn McCall 1259d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Send it our message: 1260f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson CallArgList Args; 1261d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall 1262d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // The first argument is a temporary of the enumeration-state type. 126304c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(StatePtr), getContext().getPointerType(StateTy)); 12641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1265d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // The second argument is a temporary array with space for NumItems 1266d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // pointers. We'll actually be loading elements from the array 1267d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // pointer written into the control state; this buffer is so that 1268d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // collections that *aren't* backed by arrays can still queue up 1269d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // batches of elements. 127004c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(ItemsPtr), getContext().getPointerType(ItemsTy)); 12711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1272d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // The third argument is the capacity of that temporary array. 12732acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *UnsignedLongLTy = ConvertType(getContext().UnsignedLongTy); 12744a28d5deeba33722aa009eab488591fb9055cc7eOwen Anderson llvm::Constant *Count = llvm::ConstantInt::get(UnsignedLongLTy, NumItems); 127504c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args.add(RValue::get(Count), getContext().UnsignedLongTy); 12761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1277d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Start the enumeration. 12781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump RValue CountRV = 1279ef072fd2f3347cfd857d6eb787b245b950771430John McCall CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), 1280f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson getContext().UnsignedLongTy, 1281f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson FastEnumSel, 1282c6cd5fd3eae71f8841504a396563343cfaaf503eDavid Chisnall Collection, Args); 1283f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 1284d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // The initial number of objects that were returned in the buffer. 1285d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::Value *initialBufferLimit = CountRV.getScalarVal(); 12861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1287d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::BasicBlock *EmptyBB = createBasicBlock("forcoll.empty"); 1288d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::BasicBlock *LoopInitBB = createBasicBlock("forcoll.loopinit"); 1289f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 1290d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::Value *zero = llvm::Constant::getNullValue(UnsignedLongLTy); 1291f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 1292d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // If the limit pointer was zero to begin with, the collection is 1293d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // empty; skip all this. 1294d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall Builder.CreateCondBr(Builder.CreateICmpEQ(initialBufferLimit, zero, "iszero"), 1295d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall EmptyBB, LoopInitBB); 12961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1297d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Otherwise, initialize the loop. 1298d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall EmitBlock(LoopInitBB); 12991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1300d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Save the initial mutations value. This is the value at an 1301d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // address that was written into the state object by 1302d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // countByEnumeratingWithState:objects:count:. 13031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Value *StateMutationsPtrPtr = 13042abd89c039e835e84519a4cd8a7495899a70153dAnders Carlsson Builder.CreateStructGEP(StatePtr, 2, "mutationsptr.ptr"); 13051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Value *StateMutationsPtr = Builder.CreateLoad(StateMutationsPtrPtr, 13062abd89c039e835e84519a4cd8a7495899a70153dAnders Carlsson "mutationsptr"); 13071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1308d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::Value *initialMutations = 1309d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall Builder.CreateLoad(StateMutationsPtr, "forcoll.initial-mutations"); 13101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1311d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Start looping. This is the point we return to whenever we have a 1312d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // fresh, non-empty batch of objects. 1313d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::BasicBlock *LoopBodyBB = createBasicBlock("forcoll.loopbody"); 1314d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall EmitBlock(LoopBodyBB); 13151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1316d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // The current index into the buffer. 1317bbf3bacb3e0c1ebb3e8a4a8b1330404a7e379315Jay Foad llvm::PHINode *index = Builder.CreatePHI(UnsignedLongLTy, 3, "forcoll.index"); 1318d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall index->addIncoming(zero, LoopInitBB); 1319f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 1320d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // The current buffer size. 1321bbf3bacb3e0c1ebb3e8a4a8b1330404a7e379315Jay Foad llvm::PHINode *count = Builder.CreatePHI(UnsignedLongLTy, 3, "forcoll.count"); 1322d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall count->addIncoming(initialBufferLimit, LoopInitBB); 1323f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 1324d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Check whether the mutations value has changed from where it was 1325d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // at start. StateMutationsPtr should actually be invariant between 1326d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // refreshes. 13272abd89c039e835e84519a4cd8a7495899a70153dAnders Carlsson StateMutationsPtr = Builder.CreateLoad(StateMutationsPtrPtr, "mutationsptr"); 1328d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::Value *currentMutations 1329d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall = Builder.CreateLoad(StateMutationsPtr, "statemutations"); 13301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1331d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::BasicBlock *WasMutatedBB = createBasicBlock("forcoll.mutated"); 1332361cf980a7d976ef11a37b49567412b6b63a89d7Dan Gohman llvm::BasicBlock *WasNotMutatedBB = createBasicBlock("forcoll.notmutated"); 13331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1334d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall Builder.CreateCondBr(Builder.CreateICmpEQ(currentMutations, initialMutations), 1335d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall WasNotMutatedBB, WasMutatedBB); 13361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1337d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // If so, call the enumeration-mutation function. 1338d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall EmitBlock(WasMutatedBB); 13392abd89c039e835e84519a4cd8a7495899a70153dAnders Carlsson llvm::Value *V = 13401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Builder.CreateBitCast(Collection, 1341578faa837b552403e2002b97fdfbfde14f2448e5Benjamin Kramer ConvertType(getContext().getObjCIdType())); 13422b2105e92fc77016992dae3f117f526e73af5ea9Daniel Dunbar CallArgList Args2; 134304c9a49ee251424b11d7c4e8b1c23637684cecb6Eli Friedman Args2.add(RValue::get(V), getContext().getObjCIdType()); 1344f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // FIXME: We shouldn't need to get the function info here, the runtime already 1345f5408fe484495ee4efbdd709c8a2c2fdbbbdb328Mike Stump // should have computed it to build the function. 134604a67a6aa3dfdc92d57f7f8d93ba397348c868a4John McCall EmitCall(CGM.getTypes().getFunctionInfo(getContext().VoidTy, Args2, 1347264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola FunctionType::ExtInfo()), 1348f3c47c9525153aea2de0ec4bd615b9cf2d81c103Anders Carlsson EnumerationMutationFn, ReturnValueSlot(), Args2); 13491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1350d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Otherwise, or if the mutation function returns, just continue. 1351d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall EmitBlock(WasNotMutatedBB); 13521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1353d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Initialize the element variable. 1354d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall RunCleanupsScope elementVariableScope(*this); 135557b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall bool elementIsVariable; 1356d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall LValue elementLValue; 1357d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall QualType elementType; 1358d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall if (const DeclStmt *SD = dyn_cast<DeclStmt>(S.getElement())) { 135957b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall // Initialize the variable, in case it's a __block variable or something. 136057b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall EmitAutoVarInit(variable); 1361f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 136257b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall const VarDecl* D = cast<VarDecl>(SD->getSingleDecl()); 1363d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall DeclRefExpr tempDRE(const_cast<VarDecl*>(D), D->getType(), 1364d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall VK_LValue, SourceLocation()); 1365d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall elementLValue = EmitLValue(&tempDRE); 1366d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall elementType = D->getType(); 136757b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall elementIsVariable = true; 13687acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall 13697acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall if (D->isARCPseudoStrong()) 13707acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall elementLValue.getQuals().setObjCLifetime(Qualifiers::OCL_ExplicitNone); 1371d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall } else { 1372d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall elementLValue = LValue(); // suppress warning 1373d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall elementType = cast<Expr>(S.getElement())->getType(); 137457b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall elementIsVariable = false; 1375d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall } 13762acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *convertedElementType = ConvertType(elementType); 1377f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 1378d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Fetch the buffer out of the enumeration state. 1379d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // TODO: this pointer should actually be invariant between 1380d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // refreshes, which would help us do certain loop optimizations. 1381d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::Value *StateItemsPtr = 1382d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall Builder.CreateStructGEP(StatePtr, 1, "stateitems.ptr"); 1383d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::Value *EnumStateItems = 1384d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall Builder.CreateLoad(StateItemsPtr, "stateitems"); 1385f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 1386d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Fetch the value at the current index from the buffer. 13871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump llvm::Value *CurrentItemPtr = 1388d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall Builder.CreateGEP(EnumStateItems, index, "currentitem.ptr"); 1389d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::Value *CurrentItem = Builder.CreateLoad(CurrentItemPtr); 13901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1391d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Cast that value to the right type. 1392d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall CurrentItem = Builder.CreateBitCast(CurrentItem, convertedElementType, 1393d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall "currentitem"); 13941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1395d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Make sure we have an l-value. Yes, this gets evaluated every 1396d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // time through the loop. 13977acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall if (!elementIsVariable) { 1398d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall elementLValue = EmitLValue(cast<Expr>(S.getElement())); 1399545d996ec5a3113f046944f11b27cc2d6cb055b4John McCall EmitStoreThroughLValue(RValue::get(CurrentItem), elementLValue); 14007acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall } else { 14017acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall EmitScalarInit(CurrentItem, elementLValue); 14027acddacc921cd0b3f813443a8641eeddb82dfbd4John McCall } 14031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 140457b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall // If we do have an element variable, this assignment is the end of 140557b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall // its initialization. 140657b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall if (elementIsVariable) 140757b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall EmitAutoVarCleanups(variable); 140857b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall 1409d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Perform the loop body, setting up break and continue labels. 1410e4b6d342c29d5cb9d311756100df1603810fa892Anders Carlsson BreakContinueStack.push_back(BreakContinue(LoopEnd, AfterBody)); 1411d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall { 1412d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall RunCleanupsScope Scope(*this); 1413d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall EmitStmt(S.getBody()); 1414d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall } 1415f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson BreakContinueStack.pop_back(); 14161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1417d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Destroy the element variable now. 1418d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall elementVariableScope.ForceCleanup(); 1419d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall 1420d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Check whether there are more elements. 1421ff8e11579fc904aa4032d90d2be6ce1ac5fc9fe1John McCall EmitBlock(AfterBody.getBlock()); 14221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1423d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::BasicBlock *FetchMoreBB = createBasicBlock("forcoll.refetch"); 1424d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall 1425d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // First we check in the local buffer. 1426d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::Value *indexPlusOne 1427d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall = Builder.CreateAdd(index, llvm::ConstantInt::get(UnsignedLongLTy, 1)); 1428d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall 1429d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // If we haven't overrun the buffer yet, we can continue. 1430d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall Builder.CreateCondBr(Builder.CreateICmpULT(indexPlusOne, count), 1431d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall LoopBodyBB, FetchMoreBB); 1432f0906c4edb37b20141428ca77fa7dfd00b976eafFariborz Jahanian 1433d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall index->addIncoming(indexPlusOne, AfterBody.getBlock()); 1434d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall count->addIncoming(count, AfterBody.getBlock()); 1435f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 1436d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // Otherwise, we have to fetch more elements. 1437d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall EmitBlock(FetchMoreBB); 14381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CountRV = 1440ef072fd2f3347cfd857d6eb787b245b950771430John McCall CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), 1441f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson getContext().UnsignedLongTy, 14421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump FastEnumSel, 1443c6cd5fd3eae71f8841504a396563343cfaaf503eDavid Chisnall Collection, Args); 14441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1445d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // If we got a zero count, we're done. 1446d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::Value *refetchCount = CountRV.getScalarVal(); 1447d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall 1448d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall // (note that the message send might split FetchMoreBB) 1449d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall index->addIncoming(zero, Builder.GetInsertBlock()); 1450d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall count->addIncoming(refetchCount, Builder.GetInsertBlock()); 1451d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall 1452d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall Builder.CreateCondBr(Builder.CreateICmpEQ(refetchCount, zero), 1453d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall EmptyBB, LoopBodyBB); 14541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1455f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson // No more elements. 1456d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall EmitBlock(EmptyBB); 1457f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 145857b3b6a60856eaec30fd876a8a3face8f7e3ad7bJohn McCall if (!elementIsVariable) { 1459f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson // If the element was not a declaration, set it to be null. 1460f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 1461d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall llvm::Value *null = llvm::Constant::getNullValue(convertedElementType); 1462d88687fc8b3b6e0bce1f7cb83d347ef009ab5480John McCall elementLValue = EmitLValue(cast<Expr>(S.getElement())); 1463545d996ec5a3113f046944f11b27cc2d6cb055b4John McCall EmitStoreThroughLValue(RValue::get(null), elementLValue); 1464f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson } 1465f484c31f4d6934f56070c2942d4dfdf3fee84074Anders Carlsson 146673fb35003aad027492e661a3749e921b5d1ecaf9Eric Christopher if (DI) 146773fb35003aad027492e661a3749e921b5d1ecaf9Eric Christopher DI->EmitLexicalBlockEnd(Builder, S.getSourceRange().getEnd()); 1468bcbd03ac0ac0890a436e1a179d3a285e914d41faDevang Patel 1469990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Leave the cleanup we entered in ARC. 1470990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (getLangOptions().ObjCAutoRefCount) 1471990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall PopCleanupBlock(); 1472990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 1473ff8e11579fc904aa4032d90d2be6ce1ac5fc9fe1John McCall EmitBlock(LoopEnd.getBlock()); 14743d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson} 14753d8400d9a61aa4b63ff35e5cede405b32a41425eAnders Carlsson 14761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenFunction::EmitObjCAtTryStmt(const ObjCAtTryStmt &S) { 1477f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall CGM.getObjCRuntime().EmitTryStmt(*this, S); 147864d5d6c5903157c521af496479d06dc26032d718Anders Carlsson} 147964d5d6c5903157c521af496479d06dc26032d718Anders Carlsson 14801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid CodeGenFunction::EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S) { 148164d5d6c5903157c521af496479d06dc26032d718Anders Carlsson CGM.getObjCRuntime().EmitThrowStmt(*this, S); 148264d5d6c5903157c521af496479d06dc26032d718Anders Carlsson} 148364d5d6c5903157c521af496479d06dc26032d718Anders Carlsson 148410cac6f7115b59a466bb8d2d51cdddeb38aadc37Chris Lattnervoid CodeGenFunction::EmitObjCAtSynchronizedStmt( 14851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const ObjCAtSynchronizedStmt &S) { 1486f1549f66a8216a78112286e3978cea2c29d6334cJohn McCall CGM.getObjCRuntime().EmitSynchronizedStmt(*this, S); 148710cac6f7115b59a466bb8d2d51cdddeb38aadc37Chris Lattner} 148810cac6f7115b59a466bb8d2d51cdddeb38aadc37Chris Lattner 148933e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall/// Produce the code for a CK_ARCProduceObject. Just does a 1490f85e193739c953358c865005855253af4f68a497John McCall/// primitive retain. 1491f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitObjCProduceObject(QualType type, 1492f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value) { 1493f85e193739c953358c865005855253af4f68a497John McCall return EmitARCRetain(type, value); 1494f85e193739c953358c865005855253af4f68a497John McCall} 1495f85e193739c953358c865005855253af4f68a497John McCall 1496f85e193739c953358c865005855253af4f68a497John McCallnamespace { 1497f85e193739c953358c865005855253af4f68a497John McCall struct CallObjCRelease : EHScopeStack::Cleanup { 1498bddfd87863bac7aa17d226cdfb228f49b30dd5f2John McCall CallObjCRelease(llvm::Value *object) : object(object) {} 1499bddfd87863bac7aa17d226cdfb228f49b30dd5f2John McCall llvm::Value *object; 1500f85e193739c953358c865005855253af4f68a497John McCall 1501ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 1502f85e193739c953358c865005855253af4f68a497John McCall CGF.EmitARCRelease(object, /*precise*/ true); 1503f85e193739c953358c865005855253af4f68a497John McCall } 1504f85e193739c953358c865005855253af4f68a497John McCall }; 1505f85e193739c953358c865005855253af4f68a497John McCall} 1506f85e193739c953358c865005855253af4f68a497John McCall 150733e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall/// Produce the code for a CK_ARCConsumeObject. Does a primitive 1508f85e193739c953358c865005855253af4f68a497John McCall/// release at the end of the full-expression. 1509f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitObjCConsumeObject(QualType type, 1510f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *object) { 1511f85e193739c953358c865005855253af4f68a497John McCall // If we're in a conditional branch, we need to make the cleanup 1512bddfd87863bac7aa17d226cdfb228f49b30dd5f2John McCall // conditional. 1513bddfd87863bac7aa17d226cdfb228f49b30dd5f2John McCall pushFullExprCleanup<CallObjCRelease>(getARCCleanupKind(), object); 1514f85e193739c953358c865005855253af4f68a497John McCall return object; 1515f85e193739c953358c865005855253af4f68a497John McCall} 1516f85e193739c953358c865005855253af4f68a497John McCall 1517f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitObjCExtendObjectLifetime(QualType type, 1518f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value) { 1519f85e193739c953358c865005855253af4f68a497John McCall return EmitARCRetainAutorelease(type, value); 1520f85e193739c953358c865005855253af4f68a497John McCall} 1521f85e193739c953358c865005855253af4f68a497John McCall 1522f85e193739c953358c865005855253af4f68a497John McCall 1523f85e193739c953358c865005855253af4f68a497John McCallstatic llvm::Constant *createARCRuntimeFunction(CodeGenModule &CGM, 15242acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *type, 15255f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef fnName) { 1526f85e193739c953358c865005855253af4f68a497John McCall llvm::Constant *fn = CGM.CreateRuntimeFunction(type, fnName); 1527f85e193739c953358c865005855253af4f68a497John McCall 1528f85e193739c953358c865005855253af4f68a497John McCall // In -fobjc-no-arc-runtime, emit weak references to the runtime 1529f85e193739c953358c865005855253af4f68a497John McCall // support library. 15309f084a3166b684573ba49df28fc5792bc37d92e1John McCall if (!CGM.getCodeGenOpts().ObjCRuntimeHasARC) 1531f85e193739c953358c865005855253af4f68a497John McCall if (llvm::Function *f = dyn_cast<llvm::Function>(fn)) 1532f85e193739c953358c865005855253af4f68a497John McCall f->setLinkage(llvm::Function::ExternalWeakLinkage); 1533f85e193739c953358c865005855253af4f68a497John McCall 1534f85e193739c953358c865005855253af4f68a497John McCall return fn; 1535f85e193739c953358c865005855253af4f68a497John McCall} 1536f85e193739c953358c865005855253af4f68a497John McCall 1537f85e193739c953358c865005855253af4f68a497John McCall/// Perform an operation having the signature 1538f85e193739c953358c865005855253af4f68a497John McCall/// i8* (i8*) 1539f85e193739c953358c865005855253af4f68a497John McCall/// where a null input causes a no-op and returns null. 1540f85e193739c953358c865005855253af4f68a497John McCallstatic llvm::Value *emitARCValueOperation(CodeGenFunction &CGF, 1541f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value, 1542f85e193739c953358c865005855253af4f68a497John McCall llvm::Constant *&fn, 15435f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef fnName) { 1544f85e193739c953358c865005855253af4f68a497John McCall if (isa<llvm::ConstantPointerNull>(value)) return value; 1545f85e193739c953358c865005855253af4f68a497John McCall 1546f85e193739c953358c865005855253af4f68a497John McCall if (!fn) { 15479cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner std::vector<llvm::Type*> args(1, CGF.Int8PtrTy); 15482acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *fnType = 1549f85e193739c953358c865005855253af4f68a497John McCall llvm::FunctionType::get(CGF.Int8PtrTy, args, false); 1550f85e193739c953358c865005855253af4f68a497John McCall fn = createARCRuntimeFunction(CGF.CGM, fnType, fnName); 1551f85e193739c953358c865005855253af4f68a497John McCall } 1552f85e193739c953358c865005855253af4f68a497John McCall 1553f85e193739c953358c865005855253af4f68a497John McCall // Cast the argument to 'id'. 15542acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *origType = value->getType(); 1555f85e193739c953358c865005855253af4f68a497John McCall value = CGF.Builder.CreateBitCast(value, CGF.Int8PtrTy); 1556f85e193739c953358c865005855253af4f68a497John McCall 1557f85e193739c953358c865005855253af4f68a497John McCall // Call the function. 1558f85e193739c953358c865005855253af4f68a497John McCall llvm::CallInst *call = CGF.Builder.CreateCall(fn, value); 1559f85e193739c953358c865005855253af4f68a497John McCall call->setDoesNotThrow(); 1560f85e193739c953358c865005855253af4f68a497John McCall 1561f85e193739c953358c865005855253af4f68a497John McCall // Cast the result back to the original type. 1562f85e193739c953358c865005855253af4f68a497John McCall return CGF.Builder.CreateBitCast(call, origType); 1563f85e193739c953358c865005855253af4f68a497John McCall} 1564f85e193739c953358c865005855253af4f68a497John McCall 1565f85e193739c953358c865005855253af4f68a497John McCall/// Perform an operation having the following signature: 1566f85e193739c953358c865005855253af4f68a497John McCall/// i8* (i8**) 1567f85e193739c953358c865005855253af4f68a497John McCallstatic llvm::Value *emitARCLoadOperation(CodeGenFunction &CGF, 1568f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *addr, 1569f85e193739c953358c865005855253af4f68a497John McCall llvm::Constant *&fn, 15705f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef fnName) { 1571f85e193739c953358c865005855253af4f68a497John McCall if (!fn) { 15729cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner std::vector<llvm::Type*> args(1, CGF.Int8PtrPtrTy); 15732acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *fnType = 1574f85e193739c953358c865005855253af4f68a497John McCall llvm::FunctionType::get(CGF.Int8PtrTy, args, false); 1575f85e193739c953358c865005855253af4f68a497John McCall fn = createARCRuntimeFunction(CGF.CGM, fnType, fnName); 1576f85e193739c953358c865005855253af4f68a497John McCall } 1577f85e193739c953358c865005855253af4f68a497John McCall 1578f85e193739c953358c865005855253af4f68a497John McCall // Cast the argument to 'id*'. 15792acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *origType = addr->getType(); 1580f85e193739c953358c865005855253af4f68a497John McCall addr = CGF.Builder.CreateBitCast(addr, CGF.Int8PtrPtrTy); 1581f85e193739c953358c865005855253af4f68a497John McCall 1582f85e193739c953358c865005855253af4f68a497John McCall // Call the function. 1583f85e193739c953358c865005855253af4f68a497John McCall llvm::CallInst *call = CGF.Builder.CreateCall(fn, addr); 1584f85e193739c953358c865005855253af4f68a497John McCall call->setDoesNotThrow(); 1585f85e193739c953358c865005855253af4f68a497John McCall 1586f85e193739c953358c865005855253af4f68a497John McCall // Cast the result back to a dereference of the original type. 1587f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *result = call; 1588f85e193739c953358c865005855253af4f68a497John McCall if (origType != CGF.Int8PtrPtrTy) 1589f85e193739c953358c865005855253af4f68a497John McCall result = CGF.Builder.CreateBitCast(result, 1590f85e193739c953358c865005855253af4f68a497John McCall cast<llvm::PointerType>(origType)->getElementType()); 1591f85e193739c953358c865005855253af4f68a497John McCall 1592f85e193739c953358c865005855253af4f68a497John McCall return result; 1593f85e193739c953358c865005855253af4f68a497John McCall} 1594f85e193739c953358c865005855253af4f68a497John McCall 1595f85e193739c953358c865005855253af4f68a497John McCall/// Perform an operation having the following signature: 1596f85e193739c953358c865005855253af4f68a497John McCall/// i8* (i8**, i8*) 1597f85e193739c953358c865005855253af4f68a497John McCallstatic llvm::Value *emitARCStoreOperation(CodeGenFunction &CGF, 1598f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *addr, 1599f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value, 1600f85e193739c953358c865005855253af4f68a497John McCall llvm::Constant *&fn, 16015f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef fnName, 1602f85e193739c953358c865005855253af4f68a497John McCall bool ignored) { 1603f85e193739c953358c865005855253af4f68a497John McCall assert(cast<llvm::PointerType>(addr->getType())->getElementType() 1604f85e193739c953358c865005855253af4f68a497John McCall == value->getType()); 1605f85e193739c953358c865005855253af4f68a497John McCall 1606f85e193739c953358c865005855253af4f68a497John McCall if (!fn) { 16071d236ab930816f5da27bade92904914c44b73b4cBenjamin Kramer llvm::Type *argTypes[] = { CGF.Int8PtrPtrTy, CGF.Int8PtrTy }; 1608f85e193739c953358c865005855253af4f68a497John McCall 16092acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *fnType 1610f85e193739c953358c865005855253af4f68a497John McCall = llvm::FunctionType::get(CGF.Int8PtrTy, argTypes, false); 1611f85e193739c953358c865005855253af4f68a497John McCall fn = createARCRuntimeFunction(CGF.CGM, fnType, fnName); 1612f85e193739c953358c865005855253af4f68a497John McCall } 1613f85e193739c953358c865005855253af4f68a497John McCall 16142acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *origType = value->getType(); 1615f85e193739c953358c865005855253af4f68a497John McCall 1616f85e193739c953358c865005855253af4f68a497John McCall addr = CGF.Builder.CreateBitCast(addr, CGF.Int8PtrPtrTy); 1617f85e193739c953358c865005855253af4f68a497John McCall value = CGF.Builder.CreateBitCast(value, CGF.Int8PtrTy); 1618f85e193739c953358c865005855253af4f68a497John McCall 1619f85e193739c953358c865005855253af4f68a497John McCall llvm::CallInst *result = CGF.Builder.CreateCall2(fn, addr, value); 1620f85e193739c953358c865005855253af4f68a497John McCall result->setDoesNotThrow(); 1621f85e193739c953358c865005855253af4f68a497John McCall 1622f85e193739c953358c865005855253af4f68a497John McCall if (ignored) return 0; 1623f85e193739c953358c865005855253af4f68a497John McCall 1624f85e193739c953358c865005855253af4f68a497John McCall return CGF.Builder.CreateBitCast(result, origType); 1625f85e193739c953358c865005855253af4f68a497John McCall} 1626f85e193739c953358c865005855253af4f68a497John McCall 1627f85e193739c953358c865005855253af4f68a497John McCall/// Perform an operation having the following signature: 1628f85e193739c953358c865005855253af4f68a497John McCall/// void (i8**, i8**) 1629f85e193739c953358c865005855253af4f68a497John McCallstatic void emitARCCopyOperation(CodeGenFunction &CGF, 1630f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *dst, 1631f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *src, 1632f85e193739c953358c865005855253af4f68a497John McCall llvm::Constant *&fn, 16335f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef fnName) { 1634f85e193739c953358c865005855253af4f68a497John McCall assert(dst->getType() == src->getType()); 1635f85e193739c953358c865005855253af4f68a497John McCall 1636f85e193739c953358c865005855253af4f68a497John McCall if (!fn) { 16379cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner std::vector<llvm::Type*> argTypes(2, CGF.Int8PtrPtrTy); 16382acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *fnType 1639f85e193739c953358c865005855253af4f68a497John McCall = llvm::FunctionType::get(CGF.Builder.getVoidTy(), argTypes, false); 1640f85e193739c953358c865005855253af4f68a497John McCall fn = createARCRuntimeFunction(CGF.CGM, fnType, fnName); 1641f85e193739c953358c865005855253af4f68a497John McCall } 1642f85e193739c953358c865005855253af4f68a497John McCall 1643f85e193739c953358c865005855253af4f68a497John McCall dst = CGF.Builder.CreateBitCast(dst, CGF.Int8PtrPtrTy); 1644f85e193739c953358c865005855253af4f68a497John McCall src = CGF.Builder.CreateBitCast(src, CGF.Int8PtrPtrTy); 1645f85e193739c953358c865005855253af4f68a497John McCall 1646f85e193739c953358c865005855253af4f68a497John McCall llvm::CallInst *result = CGF.Builder.CreateCall2(fn, dst, src); 1647f85e193739c953358c865005855253af4f68a497John McCall result->setDoesNotThrow(); 1648f85e193739c953358c865005855253af4f68a497John McCall} 1649f85e193739c953358c865005855253af4f68a497John McCall 1650f85e193739c953358c865005855253af4f68a497John McCall/// Produce the code to do a retain. Based on the type, calls one of: 1651f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_retain(i8* %value) 1652f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_retainBlock(i8* %value) 1653f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitARCRetain(QualType type, llvm::Value *value) { 1654f85e193739c953358c865005855253af4f68a497John McCall if (type->isBlockPointerType()) 1655348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall return EmitARCRetainBlock(value, /*mandatory*/ false); 1656f85e193739c953358c865005855253af4f68a497John McCall else 1657f85e193739c953358c865005855253af4f68a497John McCall return EmitARCRetainNonBlock(value); 1658f85e193739c953358c865005855253af4f68a497John McCall} 1659f85e193739c953358c865005855253af4f68a497John McCall 1660f85e193739c953358c865005855253af4f68a497John McCall/// Retain the given object, with normal retain semantics. 1661f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_retain(i8* %value) 1662f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitARCRetainNonBlock(llvm::Value *value) { 1663f85e193739c953358c865005855253af4f68a497John McCall return emitARCValueOperation(*this, value, 1664f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_retain, 1665f85e193739c953358c865005855253af4f68a497John McCall "objc_retain"); 1666f85e193739c953358c865005855253af4f68a497John McCall} 1667f85e193739c953358c865005855253af4f68a497John McCall 1668f85e193739c953358c865005855253af4f68a497John McCall/// Retain the given block, with _Block_copy semantics. 1669f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_retainBlock(i8* %value) 1670348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall/// 1671348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall/// \param mandatory - If false, emit the call with metadata 1672348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall/// indicating that it's okay for the optimizer to eliminate this call 1673348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall/// if it can prove that the block never escapes except down the stack. 1674348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCallllvm::Value *CodeGenFunction::EmitARCRetainBlock(llvm::Value *value, 1675348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall bool mandatory) { 1676348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall llvm::Value *result 1677348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall = emitARCValueOperation(*this, value, 1678348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall CGM.getARCEntrypoints().objc_retainBlock, 1679348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall "objc_retainBlock"); 1680348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall 1681348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall // If the copy isn't mandatory, add !clang.arc.copy_on_escape to 1682348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall // tell the optimizer that it doesn't need to do this copy if the 1683348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall // block doesn't escape, where being passed as an argument doesn't 1684348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall // count as escaping. 1685348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall if (!mandatory && isa<llvm::Instruction>(result)) { 1686348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall llvm::CallInst *call 1687348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall = cast<llvm::CallInst>(result->stripPointerCasts()); 1688348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall assert(call->getCalledValue() == CGM.getARCEntrypoints().objc_retainBlock); 1689348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall 1690348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall SmallVector<llvm::Value*,1> args; 1691348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall call->setMetadata("clang.arc.copy_on_escape", 1692348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall llvm::MDNode::get(Builder.getContext(), args)); 1693348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall } 1694348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall 1695348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall return result; 1696f85e193739c953358c865005855253af4f68a497John McCall} 1697f85e193739c953358c865005855253af4f68a497John McCall 1698f85e193739c953358c865005855253af4f68a497John McCall/// Retain the given object which is the result of a function call. 1699f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_retainAutoreleasedReturnValue(i8* %value) 1700f85e193739c953358c865005855253af4f68a497John McCall/// 1701f85e193739c953358c865005855253af4f68a497John McCall/// Yes, this function name is one character away from a different 1702f85e193739c953358c865005855253af4f68a497John McCall/// call with completely different semantics. 1703f85e193739c953358c865005855253af4f68a497John McCallllvm::Value * 1704f85e193739c953358c865005855253af4f68a497John McCallCodeGenFunction::EmitARCRetainAutoreleasedReturnValue(llvm::Value *value) { 1705f85e193739c953358c865005855253af4f68a497John McCall // Fetch the void(void) inline asm which marks that we're going to 1706f85e193739c953358c865005855253af4f68a497John McCall // retain the autoreleased return value. 1707f85e193739c953358c865005855253af4f68a497John McCall llvm::InlineAsm *&marker 1708f85e193739c953358c865005855253af4f68a497John McCall = CGM.getARCEntrypoints().retainAutoreleasedReturnValueMarker; 1709f85e193739c953358c865005855253af4f68a497John McCall if (!marker) { 17105f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef assembly 1711f85e193739c953358c865005855253af4f68a497John McCall = CGM.getTargetCodeGenInfo() 1712f85e193739c953358c865005855253af4f68a497John McCall .getARCRetainAutoreleasedReturnValueMarker(); 1713f85e193739c953358c865005855253af4f68a497John McCall 1714f85e193739c953358c865005855253af4f68a497John McCall // If we have an empty assembly string, there's nothing to do. 1715f85e193739c953358c865005855253af4f68a497John McCall if (assembly.empty()) { 1716f85e193739c953358c865005855253af4f68a497John McCall 1717f85e193739c953358c865005855253af4f68a497John McCall // Otherwise, at -O0, build an inline asm that we're going to call 1718f85e193739c953358c865005855253af4f68a497John McCall // in a moment. 1719f85e193739c953358c865005855253af4f68a497John McCall } else if (CGM.getCodeGenOpts().OptimizationLevel == 0) { 1720f85e193739c953358c865005855253af4f68a497John McCall llvm::FunctionType *type = 1721f85e193739c953358c865005855253af4f68a497John McCall llvm::FunctionType::get(llvm::Type::getVoidTy(getLLVMContext()), 1722f85e193739c953358c865005855253af4f68a497John McCall /*variadic*/ false); 1723f85e193739c953358c865005855253af4f68a497John McCall 1724f85e193739c953358c865005855253af4f68a497John McCall marker = llvm::InlineAsm::get(type, assembly, "", /*sideeffects*/ true); 1725f85e193739c953358c865005855253af4f68a497John McCall 1726f85e193739c953358c865005855253af4f68a497John McCall // If we're at -O1 and above, we don't want to litter the code 1727f85e193739c953358c865005855253af4f68a497John McCall // with this marker yet, so leave a breadcrumb for the ARC 1728f85e193739c953358c865005855253af4f68a497John McCall // optimizer to pick up. 1729f85e193739c953358c865005855253af4f68a497John McCall } else { 1730f85e193739c953358c865005855253af4f68a497John McCall llvm::NamedMDNode *metadata = 1731f85e193739c953358c865005855253af4f68a497John McCall CGM.getModule().getOrInsertNamedMetadata( 1732f85e193739c953358c865005855253af4f68a497John McCall "clang.arc.retainAutoreleasedReturnValueMarker"); 1733f85e193739c953358c865005855253af4f68a497John McCall assert(metadata->getNumOperands() <= 1); 1734f85e193739c953358c865005855253af4f68a497John McCall if (metadata->getNumOperands() == 0) { 1735f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *string = llvm::MDString::get(getLLVMContext(), assembly); 1736da549e8995c447542d5631b8b67fcc3a9582797aJay Foad metadata->addOperand(llvm::MDNode::get(getLLVMContext(), string)); 1737f85e193739c953358c865005855253af4f68a497John McCall } 1738f85e193739c953358c865005855253af4f68a497John McCall } 1739f85e193739c953358c865005855253af4f68a497John McCall } 1740f85e193739c953358c865005855253af4f68a497John McCall 1741f85e193739c953358c865005855253af4f68a497John McCall // Call the marker asm if we made one, which we do only at -O0. 1742f85e193739c953358c865005855253af4f68a497John McCall if (marker) Builder.CreateCall(marker); 1743f85e193739c953358c865005855253af4f68a497John McCall 1744f85e193739c953358c865005855253af4f68a497John McCall return emitARCValueOperation(*this, value, 1745f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_retainAutoreleasedReturnValue, 1746f85e193739c953358c865005855253af4f68a497John McCall "objc_retainAutoreleasedReturnValue"); 1747f85e193739c953358c865005855253af4f68a497John McCall} 1748f85e193739c953358c865005855253af4f68a497John McCall 1749f85e193739c953358c865005855253af4f68a497John McCall/// Release the given object. 1750f85e193739c953358c865005855253af4f68a497John McCall/// call void @objc_release(i8* %value) 1751f85e193739c953358c865005855253af4f68a497John McCallvoid CodeGenFunction::EmitARCRelease(llvm::Value *value, bool precise) { 1752f85e193739c953358c865005855253af4f68a497John McCall if (isa<llvm::ConstantPointerNull>(value)) return; 1753f85e193739c953358c865005855253af4f68a497John McCall 1754f85e193739c953358c865005855253af4f68a497John McCall llvm::Constant *&fn = CGM.getARCEntrypoints().objc_release; 1755f85e193739c953358c865005855253af4f68a497John McCall if (!fn) { 17569cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner std::vector<llvm::Type*> args(1, Int8PtrTy); 17572acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *fnType = 1758f85e193739c953358c865005855253af4f68a497John McCall llvm::FunctionType::get(Builder.getVoidTy(), args, false); 1759f85e193739c953358c865005855253af4f68a497John McCall fn = createARCRuntimeFunction(CGM, fnType, "objc_release"); 1760f85e193739c953358c865005855253af4f68a497John McCall } 1761f85e193739c953358c865005855253af4f68a497John McCall 1762f85e193739c953358c865005855253af4f68a497John McCall // Cast the argument to 'id'. 1763f85e193739c953358c865005855253af4f68a497John McCall value = Builder.CreateBitCast(value, Int8PtrTy); 1764f85e193739c953358c865005855253af4f68a497John McCall 1765f85e193739c953358c865005855253af4f68a497John McCall // Call objc_release. 1766f85e193739c953358c865005855253af4f68a497John McCall llvm::CallInst *call = Builder.CreateCall(fn, value); 1767f85e193739c953358c865005855253af4f68a497John McCall call->setDoesNotThrow(); 1768f85e193739c953358c865005855253af4f68a497John McCall 1769f85e193739c953358c865005855253af4f68a497John McCall if (!precise) { 17705f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<llvm::Value*,1> args; 1771f85e193739c953358c865005855253af4f68a497John McCall call->setMetadata("clang.imprecise_release", 1772f85e193739c953358c865005855253af4f68a497John McCall llvm::MDNode::get(Builder.getContext(), args)); 1773f85e193739c953358c865005855253af4f68a497John McCall } 1774f85e193739c953358c865005855253af4f68a497John McCall} 1775f85e193739c953358c865005855253af4f68a497John McCall 1776f85e193739c953358c865005855253af4f68a497John McCall/// Store into a strong object. Always calls this: 1777f85e193739c953358c865005855253af4f68a497John McCall/// call void @objc_storeStrong(i8** %addr, i8* %value) 1778f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitARCStoreStrongCall(llvm::Value *addr, 1779f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value, 1780f85e193739c953358c865005855253af4f68a497John McCall bool ignored) { 1781f85e193739c953358c865005855253af4f68a497John McCall assert(cast<llvm::PointerType>(addr->getType())->getElementType() 1782f85e193739c953358c865005855253af4f68a497John McCall == value->getType()); 1783f85e193739c953358c865005855253af4f68a497John McCall 1784f85e193739c953358c865005855253af4f68a497John McCall llvm::Constant *&fn = CGM.getARCEntrypoints().objc_storeStrong; 1785f85e193739c953358c865005855253af4f68a497John McCall if (!fn) { 17869cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner llvm::Type *argTypes[] = { Int8PtrPtrTy, Int8PtrTy }; 17872acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *fnType 1788f85e193739c953358c865005855253af4f68a497John McCall = llvm::FunctionType::get(Builder.getVoidTy(), argTypes, false); 1789f85e193739c953358c865005855253af4f68a497John McCall fn = createARCRuntimeFunction(CGM, fnType, "objc_storeStrong"); 1790f85e193739c953358c865005855253af4f68a497John McCall } 1791f85e193739c953358c865005855253af4f68a497John McCall 1792f85e193739c953358c865005855253af4f68a497John McCall addr = Builder.CreateBitCast(addr, Int8PtrPtrTy); 1793f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *castValue = Builder.CreateBitCast(value, Int8PtrTy); 1794f85e193739c953358c865005855253af4f68a497John McCall 1795f85e193739c953358c865005855253af4f68a497John McCall Builder.CreateCall2(fn, addr, castValue)->setDoesNotThrow(); 1796f85e193739c953358c865005855253af4f68a497John McCall 1797f85e193739c953358c865005855253af4f68a497John McCall if (ignored) return 0; 1798f85e193739c953358c865005855253af4f68a497John McCall return value; 1799f85e193739c953358c865005855253af4f68a497John McCall} 1800f85e193739c953358c865005855253af4f68a497John McCall 1801f85e193739c953358c865005855253af4f68a497John McCall/// Store into a strong object. Sometimes calls this: 1802f85e193739c953358c865005855253af4f68a497John McCall/// call void @objc_storeStrong(i8** %addr, i8* %value) 1803f85e193739c953358c865005855253af4f68a497John McCall/// Other times, breaks it down into components. 1804545d996ec5a3113f046944f11b27cc2d6cb055b4John McCallllvm::Value *CodeGenFunction::EmitARCStoreStrong(LValue dst, 1805f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *newValue, 1806f85e193739c953358c865005855253af4f68a497John McCall bool ignored) { 1807545d996ec5a3113f046944f11b27cc2d6cb055b4John McCall QualType type = dst.getType(); 1808f85e193739c953358c865005855253af4f68a497John McCall bool isBlock = type->isBlockPointerType(); 1809f85e193739c953358c865005855253af4f68a497John McCall 1810f85e193739c953358c865005855253af4f68a497John McCall // Use a store barrier at -O0 unless this is a block type or the 1811f85e193739c953358c865005855253af4f68a497John McCall // lvalue is inadequately aligned. 1812f85e193739c953358c865005855253af4f68a497John McCall if (shouldUseFusedARCCalls() && 1813f85e193739c953358c865005855253af4f68a497John McCall !isBlock && 1814f85e193739c953358c865005855253af4f68a497John McCall !(dst.getAlignment() && dst.getAlignment() < PointerAlignInBytes)) { 1815f85e193739c953358c865005855253af4f68a497John McCall return EmitARCStoreStrongCall(dst.getAddress(), newValue, ignored); 1816f85e193739c953358c865005855253af4f68a497John McCall } 1817f85e193739c953358c865005855253af4f68a497John McCall 1818f85e193739c953358c865005855253af4f68a497John McCall // Otherwise, split it out. 1819f85e193739c953358c865005855253af4f68a497John McCall 1820f85e193739c953358c865005855253af4f68a497John McCall // Retain the new value. 1821f85e193739c953358c865005855253af4f68a497John McCall newValue = EmitARCRetain(type, newValue); 1822f85e193739c953358c865005855253af4f68a497John McCall 1823f85e193739c953358c865005855253af4f68a497John McCall // Read the old value. 1824545d996ec5a3113f046944f11b27cc2d6cb055b4John McCall llvm::Value *oldValue = EmitLoadOfScalar(dst); 1825f85e193739c953358c865005855253af4f68a497John McCall 1826f85e193739c953358c865005855253af4f68a497John McCall // Store. We do this before the release so that any deallocs won't 1827f85e193739c953358c865005855253af4f68a497John McCall // see the old value. 1828545d996ec5a3113f046944f11b27cc2d6cb055b4John McCall EmitStoreOfScalar(newValue, dst); 1829f85e193739c953358c865005855253af4f68a497John McCall 1830f85e193739c953358c865005855253af4f68a497John McCall // Finally, release the old value. 1831f85e193739c953358c865005855253af4f68a497John McCall EmitARCRelease(oldValue, /*precise*/ false); 1832f85e193739c953358c865005855253af4f68a497John McCall 1833f85e193739c953358c865005855253af4f68a497John McCall return newValue; 1834f85e193739c953358c865005855253af4f68a497John McCall} 1835f85e193739c953358c865005855253af4f68a497John McCall 1836f85e193739c953358c865005855253af4f68a497John McCall/// Autorelease the given object. 1837f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_autorelease(i8* %value) 1838f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitARCAutorelease(llvm::Value *value) { 1839f85e193739c953358c865005855253af4f68a497John McCall return emitARCValueOperation(*this, value, 1840f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_autorelease, 1841f85e193739c953358c865005855253af4f68a497John McCall "objc_autorelease"); 1842f85e193739c953358c865005855253af4f68a497John McCall} 1843f85e193739c953358c865005855253af4f68a497John McCall 1844f85e193739c953358c865005855253af4f68a497John McCall/// Autorelease the given object. 1845f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_autoreleaseReturnValue(i8* %value) 1846f85e193739c953358c865005855253af4f68a497John McCallllvm::Value * 1847f85e193739c953358c865005855253af4f68a497John McCallCodeGenFunction::EmitARCAutoreleaseReturnValue(llvm::Value *value) { 1848f85e193739c953358c865005855253af4f68a497John McCall return emitARCValueOperation(*this, value, 1849f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_autoreleaseReturnValue, 1850f85e193739c953358c865005855253af4f68a497John McCall "objc_autoreleaseReturnValue"); 1851f85e193739c953358c865005855253af4f68a497John McCall} 1852f85e193739c953358c865005855253af4f68a497John McCall 1853f85e193739c953358c865005855253af4f68a497John McCall/// Do a fused retain/autorelease of the given object. 1854f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_retainAutoreleaseReturnValue(i8* %value) 1855f85e193739c953358c865005855253af4f68a497John McCallllvm::Value * 1856f85e193739c953358c865005855253af4f68a497John McCallCodeGenFunction::EmitARCRetainAutoreleaseReturnValue(llvm::Value *value) { 1857f85e193739c953358c865005855253af4f68a497John McCall return emitARCValueOperation(*this, value, 1858f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_retainAutoreleaseReturnValue, 1859f85e193739c953358c865005855253af4f68a497John McCall "objc_retainAutoreleaseReturnValue"); 1860f85e193739c953358c865005855253af4f68a497John McCall} 1861f85e193739c953358c865005855253af4f68a497John McCall 1862f85e193739c953358c865005855253af4f68a497John McCall/// Do a fused retain/autorelease of the given object. 1863f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_retainAutorelease(i8* %value) 1864f85e193739c953358c865005855253af4f68a497John McCall/// or 1865f85e193739c953358c865005855253af4f68a497John McCall/// %retain = call i8* @objc_retainBlock(i8* %value) 1866f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_autorelease(i8* %retain) 1867f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitARCRetainAutorelease(QualType type, 1868f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value) { 1869f85e193739c953358c865005855253af4f68a497John McCall if (!type->isBlockPointerType()) 1870f85e193739c953358c865005855253af4f68a497John McCall return EmitARCRetainAutoreleaseNonBlock(value); 1871f85e193739c953358c865005855253af4f68a497John McCall 1872f85e193739c953358c865005855253af4f68a497John McCall if (isa<llvm::ConstantPointerNull>(value)) return value; 1873f85e193739c953358c865005855253af4f68a497John McCall 18742acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *origType = value->getType(); 1875f85e193739c953358c865005855253af4f68a497John McCall value = Builder.CreateBitCast(value, Int8PtrTy); 1876348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall value = EmitARCRetainBlock(value, /*mandatory*/ true); 1877f85e193739c953358c865005855253af4f68a497John McCall value = EmitARCAutorelease(value); 1878f85e193739c953358c865005855253af4f68a497John McCall return Builder.CreateBitCast(value, origType); 1879f85e193739c953358c865005855253af4f68a497John McCall} 1880f85e193739c953358c865005855253af4f68a497John McCall 1881f85e193739c953358c865005855253af4f68a497John McCall/// Do a fused retain/autorelease of the given object. 1882f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_retainAutorelease(i8* %value) 1883f85e193739c953358c865005855253af4f68a497John McCallllvm::Value * 1884f85e193739c953358c865005855253af4f68a497John McCallCodeGenFunction::EmitARCRetainAutoreleaseNonBlock(llvm::Value *value) { 1885f85e193739c953358c865005855253af4f68a497John McCall return emitARCValueOperation(*this, value, 1886f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_retainAutorelease, 1887f85e193739c953358c865005855253af4f68a497John McCall "objc_retainAutorelease"); 1888f85e193739c953358c865005855253af4f68a497John McCall} 1889f85e193739c953358c865005855253af4f68a497John McCall 1890f85e193739c953358c865005855253af4f68a497John McCall/// i8* @objc_loadWeak(i8** %addr) 1891f85e193739c953358c865005855253af4f68a497John McCall/// Essentially objc_autorelease(objc_loadWeakRetained(addr)). 1892f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitARCLoadWeak(llvm::Value *addr) { 1893f85e193739c953358c865005855253af4f68a497John McCall return emitARCLoadOperation(*this, addr, 1894f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_loadWeak, 1895f85e193739c953358c865005855253af4f68a497John McCall "objc_loadWeak"); 1896f85e193739c953358c865005855253af4f68a497John McCall} 1897f85e193739c953358c865005855253af4f68a497John McCall 1898f85e193739c953358c865005855253af4f68a497John McCall/// i8* @objc_loadWeakRetained(i8** %addr) 1899f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitARCLoadWeakRetained(llvm::Value *addr) { 1900f85e193739c953358c865005855253af4f68a497John McCall return emitARCLoadOperation(*this, addr, 1901f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_loadWeakRetained, 1902f85e193739c953358c865005855253af4f68a497John McCall "objc_loadWeakRetained"); 1903f85e193739c953358c865005855253af4f68a497John McCall} 1904f85e193739c953358c865005855253af4f68a497John McCall 1905f85e193739c953358c865005855253af4f68a497John McCall/// i8* @objc_storeWeak(i8** %addr, i8* %value) 1906f85e193739c953358c865005855253af4f68a497John McCall/// Returns %value. 1907f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitARCStoreWeak(llvm::Value *addr, 1908f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value, 1909f85e193739c953358c865005855253af4f68a497John McCall bool ignored) { 1910f85e193739c953358c865005855253af4f68a497John McCall return emitARCStoreOperation(*this, addr, value, 1911f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_storeWeak, 1912f85e193739c953358c865005855253af4f68a497John McCall "objc_storeWeak", ignored); 1913f85e193739c953358c865005855253af4f68a497John McCall} 1914f85e193739c953358c865005855253af4f68a497John McCall 1915f85e193739c953358c865005855253af4f68a497John McCall/// i8* @objc_initWeak(i8** %addr, i8* %value) 1916f85e193739c953358c865005855253af4f68a497John McCall/// Returns %value. %addr is known to not have a current weak entry. 1917f85e193739c953358c865005855253af4f68a497John McCall/// Essentially equivalent to: 1918f85e193739c953358c865005855253af4f68a497John McCall/// *addr = nil; objc_storeWeak(addr, value); 1919f85e193739c953358c865005855253af4f68a497John McCallvoid CodeGenFunction::EmitARCInitWeak(llvm::Value *addr, llvm::Value *value) { 1920f85e193739c953358c865005855253af4f68a497John McCall // If we're initializing to null, just write null to memory; no need 1921f85e193739c953358c865005855253af4f68a497John McCall // to get the runtime involved. But don't do this if optimization 1922f85e193739c953358c865005855253af4f68a497John McCall // is enabled, because accounting for this would make the optimizer 1923f85e193739c953358c865005855253af4f68a497John McCall // much more complicated. 1924f85e193739c953358c865005855253af4f68a497John McCall if (isa<llvm::ConstantPointerNull>(value) && 1925f85e193739c953358c865005855253af4f68a497John McCall CGM.getCodeGenOpts().OptimizationLevel == 0) { 1926f85e193739c953358c865005855253af4f68a497John McCall Builder.CreateStore(value, addr); 1927f85e193739c953358c865005855253af4f68a497John McCall return; 1928f85e193739c953358c865005855253af4f68a497John McCall } 1929f85e193739c953358c865005855253af4f68a497John McCall 1930f85e193739c953358c865005855253af4f68a497John McCall emitARCStoreOperation(*this, addr, value, 1931f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_initWeak, 1932f85e193739c953358c865005855253af4f68a497John McCall "objc_initWeak", /*ignored*/ true); 1933f85e193739c953358c865005855253af4f68a497John McCall} 1934f85e193739c953358c865005855253af4f68a497John McCall 1935f85e193739c953358c865005855253af4f68a497John McCall/// void @objc_destroyWeak(i8** %addr) 1936f85e193739c953358c865005855253af4f68a497John McCall/// Essentially objc_storeWeak(addr, nil). 1937f85e193739c953358c865005855253af4f68a497John McCallvoid CodeGenFunction::EmitARCDestroyWeak(llvm::Value *addr) { 1938f85e193739c953358c865005855253af4f68a497John McCall llvm::Constant *&fn = CGM.getARCEntrypoints().objc_destroyWeak; 1939f85e193739c953358c865005855253af4f68a497John McCall if (!fn) { 19409cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner std::vector<llvm::Type*> args(1, Int8PtrPtrTy); 19412acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *fnType = 1942f85e193739c953358c865005855253af4f68a497John McCall llvm::FunctionType::get(Builder.getVoidTy(), args, false); 1943f85e193739c953358c865005855253af4f68a497John McCall fn = createARCRuntimeFunction(CGM, fnType, "objc_destroyWeak"); 1944f85e193739c953358c865005855253af4f68a497John McCall } 1945f85e193739c953358c865005855253af4f68a497John McCall 1946f85e193739c953358c865005855253af4f68a497John McCall // Cast the argument to 'id*'. 1947f85e193739c953358c865005855253af4f68a497John McCall addr = Builder.CreateBitCast(addr, Int8PtrPtrTy); 1948f85e193739c953358c865005855253af4f68a497John McCall 1949f85e193739c953358c865005855253af4f68a497John McCall llvm::CallInst *call = Builder.CreateCall(fn, addr); 1950f85e193739c953358c865005855253af4f68a497John McCall call->setDoesNotThrow(); 1951f85e193739c953358c865005855253af4f68a497John McCall} 1952f85e193739c953358c865005855253af4f68a497John McCall 1953f85e193739c953358c865005855253af4f68a497John McCall/// void @objc_moveWeak(i8** %dest, i8** %src) 1954f85e193739c953358c865005855253af4f68a497John McCall/// Disregards the current value in %dest. Leaves %src pointing to nothing. 1955f85e193739c953358c865005855253af4f68a497John McCall/// Essentially (objc_copyWeak(dest, src), objc_destroyWeak(src)). 1956f85e193739c953358c865005855253af4f68a497John McCallvoid CodeGenFunction::EmitARCMoveWeak(llvm::Value *dst, llvm::Value *src) { 1957f85e193739c953358c865005855253af4f68a497John McCall emitARCCopyOperation(*this, dst, src, 1958f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_moveWeak, 1959f85e193739c953358c865005855253af4f68a497John McCall "objc_moveWeak"); 1960f85e193739c953358c865005855253af4f68a497John McCall} 1961f85e193739c953358c865005855253af4f68a497John McCall 1962f85e193739c953358c865005855253af4f68a497John McCall/// void @objc_copyWeak(i8** %dest, i8** %src) 1963f85e193739c953358c865005855253af4f68a497John McCall/// Disregards the current value in %dest. Essentially 1964f85e193739c953358c865005855253af4f68a497John McCall/// objc_release(objc_initWeak(dest, objc_readWeakRetained(src))) 1965f85e193739c953358c865005855253af4f68a497John McCallvoid CodeGenFunction::EmitARCCopyWeak(llvm::Value *dst, llvm::Value *src) { 1966f85e193739c953358c865005855253af4f68a497John McCall emitARCCopyOperation(*this, dst, src, 1967f85e193739c953358c865005855253af4f68a497John McCall CGM.getARCEntrypoints().objc_copyWeak, 1968f85e193739c953358c865005855253af4f68a497John McCall "objc_copyWeak"); 1969f85e193739c953358c865005855253af4f68a497John McCall} 1970f85e193739c953358c865005855253af4f68a497John McCall 1971f85e193739c953358c865005855253af4f68a497John McCall/// Produce the code to do a objc_autoreleasepool_push. 1972f85e193739c953358c865005855253af4f68a497John McCall/// call i8* @objc_autoreleasePoolPush(void) 1973f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitObjCAutoreleasePoolPush() { 1974f85e193739c953358c865005855253af4f68a497John McCall llvm::Constant *&fn = CGM.getRREntrypoints().objc_autoreleasePoolPush; 1975f85e193739c953358c865005855253af4f68a497John McCall if (!fn) { 19762acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *fnType = 1977f85e193739c953358c865005855253af4f68a497John McCall llvm::FunctionType::get(Int8PtrTy, false); 1978f85e193739c953358c865005855253af4f68a497John McCall fn = createARCRuntimeFunction(CGM, fnType, "objc_autoreleasePoolPush"); 1979f85e193739c953358c865005855253af4f68a497John McCall } 1980f85e193739c953358c865005855253af4f68a497John McCall 1981f85e193739c953358c865005855253af4f68a497John McCall llvm::CallInst *call = Builder.CreateCall(fn); 1982f85e193739c953358c865005855253af4f68a497John McCall call->setDoesNotThrow(); 1983f85e193739c953358c865005855253af4f68a497John McCall 1984f85e193739c953358c865005855253af4f68a497John McCall return call; 1985f85e193739c953358c865005855253af4f68a497John McCall} 1986f85e193739c953358c865005855253af4f68a497John McCall 1987f85e193739c953358c865005855253af4f68a497John McCall/// Produce the code to do a primitive release. 1988f85e193739c953358c865005855253af4f68a497John McCall/// call void @objc_autoreleasePoolPop(i8* %ptr) 1989f85e193739c953358c865005855253af4f68a497John McCallvoid CodeGenFunction::EmitObjCAutoreleasePoolPop(llvm::Value *value) { 1990f85e193739c953358c865005855253af4f68a497John McCall assert(value->getType() == Int8PtrTy); 1991f85e193739c953358c865005855253af4f68a497John McCall 1992f85e193739c953358c865005855253af4f68a497John McCall llvm::Constant *&fn = CGM.getRREntrypoints().objc_autoreleasePoolPop; 1993f85e193739c953358c865005855253af4f68a497John McCall if (!fn) { 19949cbe4f0ba01ec304e1e3d071c071f7bca33631c0Chris Lattner std::vector<llvm::Type*> args(1, Int8PtrTy); 19952acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::FunctionType *fnType = 1996f85e193739c953358c865005855253af4f68a497John McCall llvm::FunctionType::get(Builder.getVoidTy(), args, false); 1997f85e193739c953358c865005855253af4f68a497John McCall 1998f85e193739c953358c865005855253af4f68a497John McCall // We don't want to use a weak import here; instead we should not 1999f85e193739c953358c865005855253af4f68a497John McCall // fall into this path. 2000f85e193739c953358c865005855253af4f68a497John McCall fn = createARCRuntimeFunction(CGM, fnType, "objc_autoreleasePoolPop"); 2001f85e193739c953358c865005855253af4f68a497John McCall } 2002f85e193739c953358c865005855253af4f68a497John McCall 2003f85e193739c953358c865005855253af4f68a497John McCall llvm::CallInst *call = Builder.CreateCall(fn, value); 2004f85e193739c953358c865005855253af4f68a497John McCall call->setDoesNotThrow(); 2005f85e193739c953358c865005855253af4f68a497John McCall} 2006f85e193739c953358c865005855253af4f68a497John McCall 2007f85e193739c953358c865005855253af4f68a497John McCall/// Produce the code to do an MRR version objc_autoreleasepool_push. 2008f85e193739c953358c865005855253af4f68a497John McCall/// Which is: [[NSAutoreleasePool alloc] init]; 2009f85e193739c953358c865005855253af4f68a497John McCall/// Where alloc is declared as: + (id) alloc; in NSAutoreleasePool class. 2010f85e193739c953358c865005855253af4f68a497John McCall/// init is declared as: - (id) init; in its NSObject super class. 2011f85e193739c953358c865005855253af4f68a497John McCall/// 2012f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitObjCMRRAutoreleasePoolPush() { 2013f85e193739c953358c865005855253af4f68a497John McCall CGObjCRuntime &Runtime = CGM.getObjCRuntime(); 2014f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *Receiver = Runtime.EmitNSAutoreleasePoolClassRef(Builder); 2015f85e193739c953358c865005855253af4f68a497John McCall // [NSAutoreleasePool alloc] 2016f85e193739c953358c865005855253af4f68a497John McCall IdentifierInfo *II = &CGM.getContext().Idents.get("alloc"); 2017f85e193739c953358c865005855253af4f68a497John McCall Selector AllocSel = getContext().Selectors.getSelector(0, &II); 2018f85e193739c953358c865005855253af4f68a497John McCall CallArgList Args; 2019f85e193739c953358c865005855253af4f68a497John McCall RValue AllocRV = 2020f85e193739c953358c865005855253af4f68a497John McCall Runtime.GenerateMessageSend(*this, ReturnValueSlot(), 2021f85e193739c953358c865005855253af4f68a497John McCall getContext().getObjCIdType(), 2022f85e193739c953358c865005855253af4f68a497John McCall AllocSel, Receiver, Args); 2023f85e193739c953358c865005855253af4f68a497John McCall 2024f85e193739c953358c865005855253af4f68a497John McCall // [Receiver init] 2025f85e193739c953358c865005855253af4f68a497John McCall Receiver = AllocRV.getScalarVal(); 2026f85e193739c953358c865005855253af4f68a497John McCall II = &CGM.getContext().Idents.get("init"); 2027f85e193739c953358c865005855253af4f68a497John McCall Selector InitSel = getContext().Selectors.getSelector(0, &II); 2028f85e193739c953358c865005855253af4f68a497John McCall RValue InitRV = 2029f85e193739c953358c865005855253af4f68a497John McCall Runtime.GenerateMessageSend(*this, ReturnValueSlot(), 2030f85e193739c953358c865005855253af4f68a497John McCall getContext().getObjCIdType(), 2031f85e193739c953358c865005855253af4f68a497John McCall InitSel, Receiver, Args); 2032f85e193739c953358c865005855253af4f68a497John McCall return InitRV.getScalarVal(); 2033f85e193739c953358c865005855253af4f68a497John McCall} 2034f85e193739c953358c865005855253af4f68a497John McCall 2035f85e193739c953358c865005855253af4f68a497John McCall/// Produce the code to do a primitive release. 2036f85e193739c953358c865005855253af4f68a497John McCall/// [tmp drain]; 2037f85e193739c953358c865005855253af4f68a497John McCallvoid CodeGenFunction::EmitObjCMRRAutoreleasePoolPop(llvm::Value *Arg) { 2038f85e193739c953358c865005855253af4f68a497John McCall IdentifierInfo *II = &CGM.getContext().Idents.get("drain"); 2039f85e193739c953358c865005855253af4f68a497John McCall Selector DrainSel = getContext().Selectors.getSelector(0, &II); 2040f85e193739c953358c865005855253af4f68a497John McCall CallArgList Args; 2041f85e193739c953358c865005855253af4f68a497John McCall CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(), 2042f85e193739c953358c865005855253af4f68a497John McCall getContext().VoidTy, DrainSel, Arg, Args); 2043f85e193739c953358c865005855253af4f68a497John McCall} 2044f85e193739c953358c865005855253af4f68a497John McCall 2045bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCallvoid CodeGenFunction::destroyARCStrongPrecise(CodeGenFunction &CGF, 2046bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall llvm::Value *addr, 2047bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall QualType type) { 2048bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall llvm::Value *ptr = CGF.Builder.CreateLoad(addr, "strongdestroy"); 2049bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall CGF.EmitARCRelease(ptr, /*precise*/ true); 2050bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall} 2051bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall 2052bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCallvoid CodeGenFunction::destroyARCStrongImprecise(CodeGenFunction &CGF, 2053bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall llvm::Value *addr, 2054bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall QualType type) { 2055bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall llvm::Value *ptr = CGF.Builder.CreateLoad(addr, "strongdestroy"); 2056bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall CGF.EmitARCRelease(ptr, /*precise*/ false); 2057bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall} 2058bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall 2059bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCallvoid CodeGenFunction::destroyARCWeak(CodeGenFunction &CGF, 2060bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall llvm::Value *addr, 2061bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall QualType type) { 2062bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall CGF.EmitARCDestroyWeak(addr); 2063bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall} 2064bdc4d80956c83a486e58d3df6bb524a1f66ff574John McCall 2065f85e193739c953358c865005855253af4f68a497John McCallnamespace { 2066f85e193739c953358c865005855253af4f68a497John McCall struct CallObjCAutoreleasePoolObject : EHScopeStack::Cleanup { 2067f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *Token; 2068f85e193739c953358c865005855253af4f68a497John McCall 2069f85e193739c953358c865005855253af4f68a497John McCall CallObjCAutoreleasePoolObject(llvm::Value *token) : Token(token) {} 2070f85e193739c953358c865005855253af4f68a497John McCall 2071ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 2072f85e193739c953358c865005855253af4f68a497John McCall CGF.EmitObjCAutoreleasePoolPop(Token); 2073f85e193739c953358c865005855253af4f68a497John McCall } 2074f85e193739c953358c865005855253af4f68a497John McCall }; 2075f85e193739c953358c865005855253af4f68a497John McCall struct CallObjCMRRAutoreleasePoolObject : EHScopeStack::Cleanup { 2076f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *Token; 2077f85e193739c953358c865005855253af4f68a497John McCall 2078f85e193739c953358c865005855253af4f68a497John McCall CallObjCMRRAutoreleasePoolObject(llvm::Value *token) : Token(token) {} 2079f85e193739c953358c865005855253af4f68a497John McCall 2080ad346f4f678ab1c3222425641d851dc63e9dfa1aJohn McCall void Emit(CodeGenFunction &CGF, Flags flags) { 2081f85e193739c953358c865005855253af4f68a497John McCall CGF.EmitObjCMRRAutoreleasePoolPop(Token); 2082f85e193739c953358c865005855253af4f68a497John McCall } 2083f85e193739c953358c865005855253af4f68a497John McCall }; 2084f85e193739c953358c865005855253af4f68a497John McCall} 2085f85e193739c953358c865005855253af4f68a497John McCall 2086f85e193739c953358c865005855253af4f68a497John McCallvoid CodeGenFunction::EmitObjCAutoreleasePoolCleanup(llvm::Value *Ptr) { 2087f85e193739c953358c865005855253af4f68a497John McCall if (CGM.getLangOptions().ObjCAutoRefCount) 2088f85e193739c953358c865005855253af4f68a497John McCall EHStack.pushCleanup<CallObjCAutoreleasePoolObject>(NormalCleanup, Ptr); 2089f85e193739c953358c865005855253af4f68a497John McCall else 2090f85e193739c953358c865005855253af4f68a497John McCall EHStack.pushCleanup<CallObjCMRRAutoreleasePoolObject>(NormalCleanup, Ptr); 2091f85e193739c953358c865005855253af4f68a497John McCall} 2092f85e193739c953358c865005855253af4f68a497John McCall 2093f85e193739c953358c865005855253af4f68a497John McCallstatic TryEmitResult tryEmitARCRetainLoadOfScalar(CodeGenFunction &CGF, 2094f85e193739c953358c865005855253af4f68a497John McCall LValue lvalue, 2095f85e193739c953358c865005855253af4f68a497John McCall QualType type) { 2096f85e193739c953358c865005855253af4f68a497John McCall switch (type.getObjCLifetime()) { 2097f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_None: 2098f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_ExplicitNone: 2099f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Strong: 2100f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Autoreleasing: 2101545d996ec5a3113f046944f11b27cc2d6cb055b4John McCall return TryEmitResult(CGF.EmitLoadOfLValue(lvalue).getScalarVal(), 2102f85e193739c953358c865005855253af4f68a497John McCall false); 2103f85e193739c953358c865005855253af4f68a497John McCall 2104f85e193739c953358c865005855253af4f68a497John McCall case Qualifiers::OCL_Weak: 2105f85e193739c953358c865005855253af4f68a497John McCall return TryEmitResult(CGF.EmitARCLoadWeakRetained(lvalue.getAddress()), 2106f85e193739c953358c865005855253af4f68a497John McCall true); 2107f85e193739c953358c865005855253af4f68a497John McCall } 2108f85e193739c953358c865005855253af4f68a497John McCall 2109f85e193739c953358c865005855253af4f68a497John McCall llvm_unreachable("impossible lifetime!"); 2110f85e193739c953358c865005855253af4f68a497John McCall return TryEmitResult(); 2111f85e193739c953358c865005855253af4f68a497John McCall} 2112f85e193739c953358c865005855253af4f68a497John McCall 2113f85e193739c953358c865005855253af4f68a497John McCallstatic TryEmitResult tryEmitARCRetainLoadOfScalar(CodeGenFunction &CGF, 2114f85e193739c953358c865005855253af4f68a497John McCall const Expr *e) { 2115f85e193739c953358c865005855253af4f68a497John McCall e = e->IgnoreParens(); 2116f85e193739c953358c865005855253af4f68a497John McCall QualType type = e->getType(); 2117f85e193739c953358c865005855253af4f68a497John McCall 21182148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall // If we're loading retained from a __strong xvalue, we can avoid 21192148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall // an extra retain/release pair by zeroing out the source of this 21202148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall // "move" operation. 21212148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall if (e->isXValue() && 21222148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall !type.isConstQualified() && 21232148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall type.getObjCLifetime() == Qualifiers::OCL_Strong) { 21242148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall // Emit the lvalue. 21252148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall LValue lv = CGF.EmitLValue(e); 21262148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall 21272148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall // Load the object pointer. 21282148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall llvm::Value *result = CGF.EmitLoadOfLValue(lv).getScalarVal(); 21292148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall 21302148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall // Set the source pointer to NULL. 21312148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall CGF.EmitStoreOfScalar(getNullForVariable(lv.getAddress()), lv); 21322148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall 21332148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall return TryEmitResult(result, true); 21342148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall } 21352148011bffc011f8e5f5b6dc1e312fa4afbc10a9John McCall 2136f85e193739c953358c865005855253af4f68a497John McCall // As a very special optimization, in ARC++, if the l-value is the 2137f85e193739c953358c865005855253af4f68a497John McCall // result of a non-volatile assignment, do a simple retain of the 2138f85e193739c953358c865005855253af4f68a497John McCall // result of the call to objc_storeWeak instead of reloading. 2139f85e193739c953358c865005855253af4f68a497John McCall if (CGF.getLangOptions().CPlusPlus && 2140f85e193739c953358c865005855253af4f68a497John McCall !type.isVolatileQualified() && 2141f85e193739c953358c865005855253af4f68a497John McCall type.getObjCLifetime() == Qualifiers::OCL_Weak && 2142f85e193739c953358c865005855253af4f68a497John McCall isa<BinaryOperator>(e) && 2143f85e193739c953358c865005855253af4f68a497John McCall cast<BinaryOperator>(e)->getOpcode() == BO_Assign) 2144f85e193739c953358c865005855253af4f68a497John McCall return TryEmitResult(CGF.EmitScalarExpr(e), false); 2145f85e193739c953358c865005855253af4f68a497John McCall 2146f85e193739c953358c865005855253af4f68a497John McCall return tryEmitARCRetainLoadOfScalar(CGF, CGF.EmitLValue(e), type); 2147f85e193739c953358c865005855253af4f68a497John McCall} 2148f85e193739c953358c865005855253af4f68a497John McCall 2149f85e193739c953358c865005855253af4f68a497John McCallstatic llvm::Value *emitARCRetainAfterCall(CodeGenFunction &CGF, 2150f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value); 2151f85e193739c953358c865005855253af4f68a497John McCall 2152f85e193739c953358c865005855253af4f68a497John McCall/// Given that the given expression is some sort of call (which does 2153f85e193739c953358c865005855253af4f68a497John McCall/// not return retained), emit a retain following it. 2154f85e193739c953358c865005855253af4f68a497John McCallstatic llvm::Value *emitARCRetainCall(CodeGenFunction &CGF, const Expr *e) { 2155f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value = CGF.EmitScalarExpr(e); 2156f85e193739c953358c865005855253af4f68a497John McCall return emitARCRetainAfterCall(CGF, value); 2157f85e193739c953358c865005855253af4f68a497John McCall} 2158f85e193739c953358c865005855253af4f68a497John McCall 2159f85e193739c953358c865005855253af4f68a497John McCallstatic llvm::Value *emitARCRetainAfterCall(CodeGenFunction &CGF, 2160f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value) { 2161f85e193739c953358c865005855253af4f68a497John McCall if (llvm::CallInst *call = dyn_cast<llvm::CallInst>(value)) { 2162f85e193739c953358c865005855253af4f68a497John McCall CGBuilderTy::InsertPoint ip = CGF.Builder.saveIP(); 2163f85e193739c953358c865005855253af4f68a497John McCall 2164f85e193739c953358c865005855253af4f68a497John McCall // Place the retain immediately following the call. 2165f85e193739c953358c865005855253af4f68a497John McCall CGF.Builder.SetInsertPoint(call->getParent(), 2166f85e193739c953358c865005855253af4f68a497John McCall ++llvm::BasicBlock::iterator(call)); 2167f85e193739c953358c865005855253af4f68a497John McCall value = CGF.EmitARCRetainAutoreleasedReturnValue(value); 2168f85e193739c953358c865005855253af4f68a497John McCall 2169f85e193739c953358c865005855253af4f68a497John McCall CGF.Builder.restoreIP(ip); 2170f85e193739c953358c865005855253af4f68a497John McCall return value; 2171f85e193739c953358c865005855253af4f68a497John McCall } else if (llvm::InvokeInst *invoke = dyn_cast<llvm::InvokeInst>(value)) { 2172f85e193739c953358c865005855253af4f68a497John McCall CGBuilderTy::InsertPoint ip = CGF.Builder.saveIP(); 2173f85e193739c953358c865005855253af4f68a497John McCall 2174f85e193739c953358c865005855253af4f68a497John McCall // Place the retain at the beginning of the normal destination block. 2175f85e193739c953358c865005855253af4f68a497John McCall llvm::BasicBlock *BB = invoke->getNormalDest(); 2176f85e193739c953358c865005855253af4f68a497John McCall CGF.Builder.SetInsertPoint(BB, BB->begin()); 2177f85e193739c953358c865005855253af4f68a497John McCall value = CGF.EmitARCRetainAutoreleasedReturnValue(value); 2178f85e193739c953358c865005855253af4f68a497John McCall 2179f85e193739c953358c865005855253af4f68a497John McCall CGF.Builder.restoreIP(ip); 2180f85e193739c953358c865005855253af4f68a497John McCall return value; 2181f85e193739c953358c865005855253af4f68a497John McCall 2182f85e193739c953358c865005855253af4f68a497John McCall // Bitcasts can arise because of related-result returns. Rewrite 2183f85e193739c953358c865005855253af4f68a497John McCall // the operand. 2184f85e193739c953358c865005855253af4f68a497John McCall } else if (llvm::BitCastInst *bitcast = dyn_cast<llvm::BitCastInst>(value)) { 2185f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *operand = bitcast->getOperand(0); 2186f85e193739c953358c865005855253af4f68a497John McCall operand = emitARCRetainAfterCall(CGF, operand); 2187f85e193739c953358c865005855253af4f68a497John McCall bitcast->setOperand(0, operand); 2188f85e193739c953358c865005855253af4f68a497John McCall return bitcast; 2189f85e193739c953358c865005855253af4f68a497John McCall 2190f85e193739c953358c865005855253af4f68a497John McCall // Generic fall-back case. 2191f85e193739c953358c865005855253af4f68a497John McCall } else { 2192f85e193739c953358c865005855253af4f68a497John McCall // Retain using the non-block variant: we never need to do a copy 2193f85e193739c953358c865005855253af4f68a497John McCall // of a block that's been returned to us. 2194f85e193739c953358c865005855253af4f68a497John McCall return CGF.EmitARCRetainNonBlock(value); 2195f85e193739c953358c865005855253af4f68a497John McCall } 2196f85e193739c953358c865005855253af4f68a497John McCall} 2197f85e193739c953358c865005855253af4f68a497John McCall 2198dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall/// Determine whether it might be important to emit a separate 2199dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall/// objc_retain_block on the result of the given expression, or 2200dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall/// whether it's okay to just emit it in a +1 context. 2201dc05b11c67331016473fbc7909827b1b89c9616bJohn McCallstatic bool shouldEmitSeparateBlockRetain(const Expr *e) { 2202dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall assert(e->getType()->isBlockPointerType()); 2203dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall e = e->IgnoreParens(); 2204dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 2205dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // For future goodness, emit block expressions directly in +1 2206dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // contexts if we can. 2207dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall if (isa<BlockExpr>(e)) 2208dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall return false; 2209dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 2210dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall if (const CastExpr *cast = dyn_cast<CastExpr>(e)) { 2211dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall switch (cast->getCastKind()) { 2212dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // Emitting these operations in +1 contexts is goodness. 2213dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall case CK_LValueToRValue: 221433e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCReclaimReturnedObject: 221533e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCConsumeObject: 221633e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCProduceObject: 2217dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall return false; 2218dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 2219dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // These operations preserve a block type. 2220dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall case CK_NoOp: 2221dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall case CK_BitCast: 2222dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall return shouldEmitSeparateBlockRetain(cast->getSubExpr()); 2223dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 2224dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // These operations are known to be bad (or haven't been considered). 2225dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall case CK_AnyPointerToBlockPointerCast: 2226dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall default: 2227dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall return true; 2228dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall } 2229dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall } 2230dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 2231dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall return true; 2232dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall} 2233dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 2234f85e193739c953358c865005855253af4f68a497John McCallstatic TryEmitResult 2235f85e193739c953358c865005855253af4f68a497John McCalltryEmitARCRetainScalarExpr(CodeGenFunction &CGF, const Expr *e) { 2236990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall // Look through cleanups. 2237990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall if (const ExprWithCleanups *cleanups = dyn_cast<ExprWithCleanups>(e)) { 2238990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall CodeGenFunction::RunCleanupsScope scope(CGF); 2239990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall return tryEmitARCRetainScalarExpr(CGF, cleanups->getSubExpr()); 2240990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall } 2241990567cb60e8530ba01b41d4e056e32b44b95ec0John McCall 2242f85e193739c953358c865005855253af4f68a497John McCall // The desired result type, if it differs from the type of the 2243f85e193739c953358c865005855253af4f68a497John McCall // ultimate opaque expression. 22442acc6e3feda5e4f7d9009bdcf8b1cd777fecfe2dChris Lattner llvm::Type *resultType = 0; 2245f85e193739c953358c865005855253af4f68a497John McCall 2246f85e193739c953358c865005855253af4f68a497John McCall while (true) { 2247f85e193739c953358c865005855253af4f68a497John McCall e = e->IgnoreParens(); 2248f85e193739c953358c865005855253af4f68a497John McCall 2249f85e193739c953358c865005855253af4f68a497John McCall // There's a break at the end of this if-chain; anything 2250f85e193739c953358c865005855253af4f68a497John McCall // that wants to keep looping has to explicitly continue. 2251f85e193739c953358c865005855253af4f68a497John McCall if (const CastExpr *ce = dyn_cast<CastExpr>(e)) { 2252f85e193739c953358c865005855253af4f68a497John McCall switch (ce->getCastKind()) { 2253f85e193739c953358c865005855253af4f68a497John McCall // No-op casts don't change the type, so we just ignore them. 2254f85e193739c953358c865005855253af4f68a497John McCall case CK_NoOp: 2255f85e193739c953358c865005855253af4f68a497John McCall e = ce->getSubExpr(); 2256f85e193739c953358c865005855253af4f68a497John McCall continue; 2257f85e193739c953358c865005855253af4f68a497John McCall 2258f85e193739c953358c865005855253af4f68a497John McCall case CK_LValueToRValue: { 2259f85e193739c953358c865005855253af4f68a497John McCall TryEmitResult loadResult 2260f85e193739c953358c865005855253af4f68a497John McCall = tryEmitARCRetainLoadOfScalar(CGF, ce->getSubExpr()); 2261f85e193739c953358c865005855253af4f68a497John McCall if (resultType) { 2262f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value = loadResult.getPointer(); 2263f85e193739c953358c865005855253af4f68a497John McCall value = CGF.Builder.CreateBitCast(value, resultType); 2264f85e193739c953358c865005855253af4f68a497John McCall loadResult.setPointer(value); 2265f85e193739c953358c865005855253af4f68a497John McCall } 2266f85e193739c953358c865005855253af4f68a497John McCall return loadResult; 2267f85e193739c953358c865005855253af4f68a497John McCall } 2268f85e193739c953358c865005855253af4f68a497John McCall 2269f85e193739c953358c865005855253af4f68a497John McCall // These casts can change the type, so remember that and 2270f85e193739c953358c865005855253af4f68a497John McCall // soldier on. We only need to remember the outermost such 2271f85e193739c953358c865005855253af4f68a497John McCall // cast, though. 22721d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_CPointerToObjCPointerCast: 22731d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_BlockPointerToObjCPointerCast: 2274f85e193739c953358c865005855253af4f68a497John McCall case CK_AnyPointerToBlockPointerCast: 2275f85e193739c953358c865005855253af4f68a497John McCall case CK_BitCast: 2276f85e193739c953358c865005855253af4f68a497John McCall if (!resultType) 2277f85e193739c953358c865005855253af4f68a497John McCall resultType = CGF.ConvertType(ce->getType()); 2278f85e193739c953358c865005855253af4f68a497John McCall e = ce->getSubExpr(); 2279f85e193739c953358c865005855253af4f68a497John McCall assert(e->getType()->hasPointerRepresentation()); 2280f85e193739c953358c865005855253af4f68a497John McCall continue; 2281f85e193739c953358c865005855253af4f68a497John McCall 2282f85e193739c953358c865005855253af4f68a497John McCall // For consumptions, just emit the subexpression and thus elide 2283f85e193739c953358c865005855253af4f68a497John McCall // the retain/release pair. 228433e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCConsumeObject: { 2285f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *result = CGF.EmitScalarExpr(ce->getSubExpr()); 2286f85e193739c953358c865005855253af4f68a497John McCall if (resultType) result = CGF.Builder.CreateBitCast(result, resultType); 2287f85e193739c953358c865005855253af4f68a497John McCall return TryEmitResult(result, true); 2288f85e193739c953358c865005855253af4f68a497John McCall } 2289f85e193739c953358c865005855253af4f68a497John McCall 2290dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // Block extends are net +0. Naively, we could just recurse on 2291dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // the subexpression, but actually we need to ensure that the 2292dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // value is copied as a block, so there's a little filter here. 229333e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCExtendBlockObject: { 2294dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall llvm::Value *result; // will be a +0 value 2295dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 2296dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // If we can't safely assume the sub-expression will produce a 2297dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // block-copied value, emit the sub-expression at +0. 2298dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall if (shouldEmitSeparateBlockRetain(ce->getSubExpr())) { 2299dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall result = CGF.EmitScalarExpr(ce->getSubExpr()); 2300dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 2301dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // Otherwise, try to emit the sub-expression at +1 recursively. 2302dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall } else { 2303dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall TryEmitResult subresult 2304dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall = tryEmitARCRetainScalarExpr(CGF, ce->getSubExpr()); 2305dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall result = subresult.getPointer(); 2306dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 2307dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // If that produced a retained value, just use that, 2308dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // possibly casting down. 2309dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall if (subresult.getInt()) { 2310dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall if (resultType) 2311dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall result = CGF.Builder.CreateBitCast(result, resultType); 2312dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall return TryEmitResult(result, true); 2313dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall } 2314dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 2315dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // Otherwise it's +0. 2316dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall } 2317dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 2318dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall // Retain the object as a block, then cast down. 2319348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall result = CGF.EmitARCRetainBlock(result, /*mandatory*/ true); 2320dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall if (resultType) result = CGF.Builder.CreateBitCast(result, resultType); 2321dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall return TryEmitResult(result, true); 2322dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall } 2323dc05b11c67331016473fbc7909827b1b89c9616bJohn McCall 23247e5e5f4cc36fe50f46ad76dca7a266434c94f475John McCall // For reclaims, emit the subexpression as a retained call and 23257e5e5f4cc36fe50f46ad76dca7a266434c94f475John McCall // skip the consumption. 232633e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCReclaimReturnedObject: { 23277e5e5f4cc36fe50f46ad76dca7a266434c94f475John McCall llvm::Value *result = emitARCRetainCall(CGF, ce->getSubExpr()); 23287e5e5f4cc36fe50f46ad76dca7a266434c94f475John McCall if (resultType) result = CGF.Builder.CreateBitCast(result, resultType); 23297e5e5f4cc36fe50f46ad76dca7a266434c94f475John McCall return TryEmitResult(result, true); 23307e5e5f4cc36fe50f46ad76dca7a266434c94f475John McCall } 23317e5e5f4cc36fe50f46ad76dca7a266434c94f475John McCall 2332f85e193739c953358c865005855253af4f68a497John McCall case CK_GetObjCProperty: { 2333f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *result = emitARCRetainCall(CGF, ce); 2334f85e193739c953358c865005855253af4f68a497John McCall if (resultType) result = CGF.Builder.CreateBitCast(result, resultType); 2335f85e193739c953358c865005855253af4f68a497John McCall return TryEmitResult(result, true); 2336f85e193739c953358c865005855253af4f68a497John McCall } 2337f85e193739c953358c865005855253af4f68a497John McCall 2338f85e193739c953358c865005855253af4f68a497John McCall default: 2339f85e193739c953358c865005855253af4f68a497John McCall break; 2340f85e193739c953358c865005855253af4f68a497John McCall } 2341f85e193739c953358c865005855253af4f68a497John McCall 2342f85e193739c953358c865005855253af4f68a497John McCall // Skip __extension__. 2343f85e193739c953358c865005855253af4f68a497John McCall } else if (const UnaryOperator *op = dyn_cast<UnaryOperator>(e)) { 2344f85e193739c953358c865005855253af4f68a497John McCall if (op->getOpcode() == UO_Extension) { 2345f85e193739c953358c865005855253af4f68a497John McCall e = op->getSubExpr(); 2346f85e193739c953358c865005855253af4f68a497John McCall continue; 2347f85e193739c953358c865005855253af4f68a497John McCall } 2348f85e193739c953358c865005855253af4f68a497John McCall 2349f85e193739c953358c865005855253af4f68a497John McCall // For calls and message sends, use the retained-call logic. 2350f85e193739c953358c865005855253af4f68a497John McCall // Delegate inits are a special case in that they're the only 2351f85e193739c953358c865005855253af4f68a497John McCall // returns-retained expression that *isn't* surrounded by 2352f85e193739c953358c865005855253af4f68a497John McCall // a consume. 2353f85e193739c953358c865005855253af4f68a497John McCall } else if (isa<CallExpr>(e) || 2354f85e193739c953358c865005855253af4f68a497John McCall (isa<ObjCMessageExpr>(e) && 2355f85e193739c953358c865005855253af4f68a497John McCall !cast<ObjCMessageExpr>(e)->isDelegateInitCall())) { 2356f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *result = emitARCRetainCall(CGF, e); 2357f85e193739c953358c865005855253af4f68a497John McCall if (resultType) result = CGF.Builder.CreateBitCast(result, resultType); 2358f85e193739c953358c865005855253af4f68a497John McCall return TryEmitResult(result, true); 2359f85e193739c953358c865005855253af4f68a497John McCall } 2360f85e193739c953358c865005855253af4f68a497John McCall 2361f85e193739c953358c865005855253af4f68a497John McCall // Conservatively halt the search at any other expression kind. 2362f85e193739c953358c865005855253af4f68a497John McCall break; 2363f85e193739c953358c865005855253af4f68a497John McCall } 2364f85e193739c953358c865005855253af4f68a497John McCall 2365f85e193739c953358c865005855253af4f68a497John McCall // We didn't find an obvious production, so emit what we've got and 2366f85e193739c953358c865005855253af4f68a497John McCall // tell the caller that we didn't manage to retain. 2367f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *result = CGF.EmitScalarExpr(e); 2368f85e193739c953358c865005855253af4f68a497John McCall if (resultType) result = CGF.Builder.CreateBitCast(result, resultType); 2369f85e193739c953358c865005855253af4f68a497John McCall return TryEmitResult(result, false); 2370f85e193739c953358c865005855253af4f68a497John McCall} 2371f85e193739c953358c865005855253af4f68a497John McCall 2372f85e193739c953358c865005855253af4f68a497John McCallstatic llvm::Value *emitARCRetainLoadOfScalar(CodeGenFunction &CGF, 2373f85e193739c953358c865005855253af4f68a497John McCall LValue lvalue, 2374f85e193739c953358c865005855253af4f68a497John McCall QualType type) { 2375f85e193739c953358c865005855253af4f68a497John McCall TryEmitResult result = tryEmitARCRetainLoadOfScalar(CGF, lvalue, type); 2376f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value = result.getPointer(); 2377f85e193739c953358c865005855253af4f68a497John McCall if (!result.getInt()) 2378f85e193739c953358c865005855253af4f68a497John McCall value = CGF.EmitARCRetain(type, value); 2379f85e193739c953358c865005855253af4f68a497John McCall return value; 2380f85e193739c953358c865005855253af4f68a497John McCall} 2381f85e193739c953358c865005855253af4f68a497John McCall 2382f85e193739c953358c865005855253af4f68a497John McCall/// EmitARCRetainScalarExpr - Semantically equivalent to 2383f85e193739c953358c865005855253af4f68a497John McCall/// EmitARCRetainObject(e->getType(), EmitScalarExpr(e)), but making a 2384f85e193739c953358c865005855253af4f68a497John McCall/// best-effort attempt to peephole expressions that naturally produce 2385f85e193739c953358c865005855253af4f68a497John McCall/// retained objects. 2386f85e193739c953358c865005855253af4f68a497John McCallllvm::Value *CodeGenFunction::EmitARCRetainScalarExpr(const Expr *e) { 2387f85e193739c953358c865005855253af4f68a497John McCall TryEmitResult result = tryEmitARCRetainScalarExpr(*this, e); 2388f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value = result.getPointer(); 2389f85e193739c953358c865005855253af4f68a497John McCall if (!result.getInt()) 2390f85e193739c953358c865005855253af4f68a497John McCall value = EmitARCRetain(e->getType(), value); 2391f85e193739c953358c865005855253af4f68a497John McCall return value; 2392f85e193739c953358c865005855253af4f68a497John McCall} 2393f85e193739c953358c865005855253af4f68a497John McCall 2394f85e193739c953358c865005855253af4f68a497John McCallllvm::Value * 2395f85e193739c953358c865005855253af4f68a497John McCallCodeGenFunction::EmitARCRetainAutoreleaseScalarExpr(const Expr *e) { 2396f85e193739c953358c865005855253af4f68a497John McCall TryEmitResult result = tryEmitARCRetainScalarExpr(*this, e); 2397f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value = result.getPointer(); 2398f85e193739c953358c865005855253af4f68a497John McCall if (result.getInt()) 2399f85e193739c953358c865005855253af4f68a497John McCall value = EmitARCAutorelease(value); 2400f85e193739c953358c865005855253af4f68a497John McCall else 2401f85e193739c953358c865005855253af4f68a497John McCall value = EmitARCRetainAutorelease(e->getType(), value); 2402f85e193739c953358c865005855253af4f68a497John McCall return value; 2403f85e193739c953358c865005855253af4f68a497John McCall} 2404f85e193739c953358c865005855253af4f68a497John McCall 2405348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCallllvm::Value *CodeGenFunction::EmitARCExtendBlockObject(const Expr *e) { 2406348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall llvm::Value *result; 2407348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall bool doRetain; 2408348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall 2409348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall if (shouldEmitSeparateBlockRetain(e)) { 2410348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall result = EmitScalarExpr(e); 2411348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall doRetain = true; 2412348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall } else { 2413348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall TryEmitResult subresult = tryEmitARCRetainScalarExpr(*this, e); 2414348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall result = subresult.getPointer(); 2415348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall doRetain = !subresult.getInt(); 2416348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall } 2417348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall 2418348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall if (doRetain) 2419348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall result = EmitARCRetainBlock(result, /*mandatory*/ true); 2420348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall return EmitObjCConsumeObject(e->getType(), result); 2421348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall} 2422348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall 24232b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCallllvm::Value *CodeGenFunction::EmitObjCThrowOperand(const Expr *expr) { 24242b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // In ARC, retain and autorelease the expression. 24252b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall if (getLangOptions().ObjCAutoRefCount) { 24262b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // Do so before running any cleanups for the full-expression. 24272b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // tryEmitARCRetainScalarExpr does make an effort to do things 24282b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // inside cleanups, but there are crazy cases like 24292b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // @throw A().foo; 24302b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // where a full retain+autorelease is required and would 24312b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // otherwise happen after the destructor for the temporary. 24322b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall CodeGenFunction::RunCleanupsScope cleanups(*this); 24332b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(expr)) 24342b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall expr = ewc->getSubExpr(); 24352b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall 24362b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall return EmitARCRetainAutoreleaseScalarExpr(expr); 24372b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall } 24382b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall 24392b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // Otherwise, use the normal scalar-expression emission. The 24402b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // exception machinery doesn't do anything special with the 24412b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // exception like retaining it, so there's no safety associated with 24422b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // only running cleanups after the throw has started, and when it 24432b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall // matters it tends to be substantially inferior code. 24442b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall return EmitScalarExpr(expr); 24452b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall} 24462b014d6c0c6b8ac94b416ac37dfc7931f20777a7John McCall 2447f85e193739c953358c865005855253af4f68a497John McCallstd::pair<LValue,llvm::Value*> 2448f85e193739c953358c865005855253af4f68a497John McCallCodeGenFunction::EmitARCStoreStrong(const BinaryOperator *e, 2449f85e193739c953358c865005855253af4f68a497John McCall bool ignored) { 2450f85e193739c953358c865005855253af4f68a497John McCall // Evaluate the RHS first. 2451f85e193739c953358c865005855253af4f68a497John McCall TryEmitResult result = tryEmitARCRetainScalarExpr(*this, e->getRHS()); 2452f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value = result.getPointer(); 2453f85e193739c953358c865005855253af4f68a497John McCall 2454fb7208119a60f68c87e7d4b6e4b87371871abb49John McCall bool hasImmediateRetain = result.getInt(); 2455fb7208119a60f68c87e7d4b6e4b87371871abb49John McCall 2456fb7208119a60f68c87e7d4b6e4b87371871abb49John McCall // If we didn't emit a retained object, and the l-value is of block 2457fb7208119a60f68c87e7d4b6e4b87371871abb49John McCall // type, then we need to emit the block-retain immediately in case 2458fb7208119a60f68c87e7d4b6e4b87371871abb49John McCall // it invalidates the l-value. 2459fb7208119a60f68c87e7d4b6e4b87371871abb49John McCall if (!hasImmediateRetain && e->getType()->isBlockPointerType()) { 2460348f16fc7c71f0d9b651cb79fd1012843073493fJohn McCall value = EmitARCRetainBlock(value, /*mandatory*/ false); 2461fb7208119a60f68c87e7d4b6e4b87371871abb49John McCall hasImmediateRetain = true; 2462fb7208119a60f68c87e7d4b6e4b87371871abb49John McCall } 2463fb7208119a60f68c87e7d4b6e4b87371871abb49John McCall 2464f85e193739c953358c865005855253af4f68a497John McCall LValue lvalue = EmitLValue(e->getLHS()); 2465f85e193739c953358c865005855253af4f68a497John McCall 2466f85e193739c953358c865005855253af4f68a497John McCall // If the RHS was emitted retained, expand this. 2467fb7208119a60f68c87e7d4b6e4b87371871abb49John McCall if (hasImmediateRetain) { 2468f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *oldValue = 2469f85e193739c953358c865005855253af4f68a497John McCall EmitLoadOfScalar(lvalue.getAddress(), lvalue.isVolatileQualified(), 2470f85e193739c953358c865005855253af4f68a497John McCall lvalue.getAlignment(), e->getType(), 2471f85e193739c953358c865005855253af4f68a497John McCall lvalue.getTBAAInfo()); 2472f85e193739c953358c865005855253af4f68a497John McCall EmitStoreOfScalar(value, lvalue.getAddress(), 2473f85e193739c953358c865005855253af4f68a497John McCall lvalue.isVolatileQualified(), lvalue.getAlignment(), 2474f85e193739c953358c865005855253af4f68a497John McCall e->getType(), lvalue.getTBAAInfo()); 2475f85e193739c953358c865005855253af4f68a497John McCall EmitARCRelease(oldValue, /*precise*/ false); 2476f85e193739c953358c865005855253af4f68a497John McCall } else { 2477545d996ec5a3113f046944f11b27cc2d6cb055b4John McCall value = EmitARCStoreStrong(lvalue, value, ignored); 2478f85e193739c953358c865005855253af4f68a497John McCall } 2479f85e193739c953358c865005855253af4f68a497John McCall 2480f85e193739c953358c865005855253af4f68a497John McCall return std::pair<LValue,llvm::Value*>(lvalue, value); 2481f85e193739c953358c865005855253af4f68a497John McCall} 2482f85e193739c953358c865005855253af4f68a497John McCall 2483f85e193739c953358c865005855253af4f68a497John McCallstd::pair<LValue,llvm::Value*> 2484f85e193739c953358c865005855253af4f68a497John McCallCodeGenFunction::EmitARCStoreAutoreleasing(const BinaryOperator *e) { 2485f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *value = EmitARCRetainAutoreleaseScalarExpr(e->getRHS()); 2486f85e193739c953358c865005855253af4f68a497John McCall LValue lvalue = EmitLValue(e->getLHS()); 2487f85e193739c953358c865005855253af4f68a497John McCall 2488f85e193739c953358c865005855253af4f68a497John McCall EmitStoreOfScalar(value, lvalue.getAddress(), 2489f85e193739c953358c865005855253af4f68a497John McCall lvalue.isVolatileQualified(), lvalue.getAlignment(), 2490f85e193739c953358c865005855253af4f68a497John McCall e->getType(), lvalue.getTBAAInfo()); 2491f85e193739c953358c865005855253af4f68a497John McCall 2492f85e193739c953358c865005855253af4f68a497John McCall return std::pair<LValue,llvm::Value*>(lvalue, value); 2493f85e193739c953358c865005855253af4f68a497John McCall} 2494f85e193739c953358c865005855253af4f68a497John McCall 2495f85e193739c953358c865005855253af4f68a497John McCallvoid CodeGenFunction::EmitObjCAutoreleasePoolStmt( 2496f85e193739c953358c865005855253af4f68a497John McCall const ObjCAutoreleasePoolStmt &ARPS) { 2497f85e193739c953358c865005855253af4f68a497John McCall const Stmt *subStmt = ARPS.getSubStmt(); 2498f85e193739c953358c865005855253af4f68a497John McCall const CompoundStmt &S = cast<CompoundStmt>(*subStmt); 2499f85e193739c953358c865005855253af4f68a497John McCall 2500f85e193739c953358c865005855253af4f68a497John McCall CGDebugInfo *DI = getDebugInfo(); 250173fb35003aad027492e661a3749e921b5d1ecaf9Eric Christopher if (DI) 250273fb35003aad027492e661a3749e921b5d1ecaf9Eric Christopher DI->EmitLexicalBlockStart(Builder, S.getLBracLoc()); 2503f85e193739c953358c865005855253af4f68a497John McCall 2504f85e193739c953358c865005855253af4f68a497John McCall // Keep track of the current cleanup stack depth. 2505f85e193739c953358c865005855253af4f68a497John McCall RunCleanupsScope Scope(*this); 25069f084a3166b684573ba49df28fc5792bc37d92e1John McCall if (CGM.getCodeGenOpts().ObjCRuntimeHasARC) { 2507f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *token = EmitObjCAutoreleasePoolPush(); 2508f85e193739c953358c865005855253af4f68a497John McCall EHStack.pushCleanup<CallObjCAutoreleasePoolObject>(NormalCleanup, token); 2509f85e193739c953358c865005855253af4f68a497John McCall } else { 2510f85e193739c953358c865005855253af4f68a497John McCall llvm::Value *token = EmitObjCMRRAutoreleasePoolPush(); 2511f85e193739c953358c865005855253af4f68a497John McCall EHStack.pushCleanup<CallObjCMRRAutoreleasePoolObject>(NormalCleanup, token); 2512f85e193739c953358c865005855253af4f68a497John McCall } 2513f85e193739c953358c865005855253af4f68a497John McCall 2514f85e193739c953358c865005855253af4f68a497John McCall for (CompoundStmt::const_body_iterator I = S.body_begin(), 2515f85e193739c953358c865005855253af4f68a497John McCall E = S.body_end(); I != E; ++I) 2516f85e193739c953358c865005855253af4f68a497John McCall EmitStmt(*I); 2517f85e193739c953358c865005855253af4f68a497John McCall 251873fb35003aad027492e661a3749e921b5d1ecaf9Eric Christopher if (DI) 251973fb35003aad027492e661a3749e921b5d1ecaf9Eric Christopher DI->EmitLexicalBlockEnd(Builder, S.getRBracLoc()); 2520f85e193739c953358c865005855253af4f68a497John McCall} 25210c24c808e4dce43e88abf2d5f98546b901bd4315John McCall 25220c24c808e4dce43e88abf2d5f98546b901bd4315John McCall/// EmitExtendGCLifetime - Given a pointer to an Objective-C object, 25230c24c808e4dce43e88abf2d5f98546b901bd4315John McCall/// make sure it survives garbage collection until this point. 25240c24c808e4dce43e88abf2d5f98546b901bd4315John McCallvoid CodeGenFunction::EmitExtendGCLifetime(llvm::Value *object) { 25250c24c808e4dce43e88abf2d5f98546b901bd4315John McCall // We just use an inline assembly. 25260c24c808e4dce43e88abf2d5f98546b901bd4315John McCall llvm::FunctionType *extenderType 2527da549e8995c447542d5631b8b67fcc3a9582797aJay Foad = llvm::FunctionType::get(VoidTy, VoidPtrTy, /*variadic*/ false); 25280c24c808e4dce43e88abf2d5f98546b901bd4315John McCall llvm::Value *extender 25290c24c808e4dce43e88abf2d5f98546b901bd4315John McCall = llvm::InlineAsm::get(extenderType, 25300c24c808e4dce43e88abf2d5f98546b901bd4315John McCall /* assembly */ "", 25310c24c808e4dce43e88abf2d5f98546b901bd4315John McCall /* constraints */ "r", 25320c24c808e4dce43e88abf2d5f98546b901bd4315John McCall /* side effects */ true); 25330c24c808e4dce43e88abf2d5f98546b901bd4315John McCall 25340c24c808e4dce43e88abf2d5f98546b901bd4315John McCall object = Builder.CreateBitCast(object, VoidPtrTy); 25350c24c808e4dce43e88abf2d5f98546b901bd4315John McCall Builder.CreateCall(extender, object)->setDoesNotThrow(); 25360c24c808e4dce43e88abf2d5f98546b901bd4315John McCall} 25370c24c808e4dce43e88abf2d5f98546b901bd4315John McCall 25382979ec73b4f974d85f2ce84167712177a44c6f09Ted KremenekCGObjCRuntime::~CGObjCRuntime() {} 2539