Automatic Reference Counting.

Language-design credit goes to a lot of people, but I particularly want
to single out Blaine Garst and Patrick Beard for their contributions.

Compiler implementation credit goes to Argyrios, Doug, Fariborz, and myself,
in no particular order.

llvm-svn: 133103

1 files changed, 17 insertions, 4 deletions

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 7a1a968259f..78c57b4e3f2 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -64,7 +64,7 @@ CodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO,
     ABI(createCXXABI(*this)), 
     Types(C, M, TD, getTargetCodeGenInfo().getABIInfo(), ABI),
     TBAA(0),
-    VTables(*this), Runtime(0), DebugInfo(0),
+    VTables(*this), Runtime(0), DebugInfo(0), ARCData(0), RRData(0),
     CFConstantStringClassRef(0), ConstantStringClassRef(0),
     VMContext(M.getContext()),
     NSConcreteGlobalBlockDecl(0), NSConcreteStackBlockDecl(0),
@@ -88,6 +88,10 @@ CodeGenModule::CodeGenModule(ASTContext &C, const CodeGenOptions &CGO,
 
   Block.GlobalUniqueCount = 0;
 
+  if (C.getLangOptions().ObjCAutoRefCount)
+    ARCData = new ARCEntrypoints();
+  RRData = new RREntrypoints();
+
   // Initialize the type cache.
   llvm::LLVMContext &LLVMContext = M.getContext();
   VoidTy = llvm::Type::getVoidTy(LLVMContext);
@@ -108,6 +112,8 @@ CodeGenModule::~CodeGenModule() {
   delete &ABI;
   delete TBAA;
   delete DebugInfo;
+  delete ARCData;
+  delete RRData;
 }
 
 void CodeGenModule::createObjCRuntime() {
@@ -830,7 +836,8 @@ void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD) {
 llvm::Constant *
 CodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName,
                                        const llvm::Type *Ty,
-                                       GlobalDecl D, bool ForVTable) {
+                                       GlobalDecl D, bool ForVTable,
+                                       llvm::Attributes ExtraAttrs) {
   // Lookup the entry, lazily creating it if necessary.
   llvm::GlobalValue *Entry = GetGlobalValue(MangledName);
   if (Entry) {
@@ -869,6 +876,8 @@ CodeGenModule::GetOrCreateLLVMFunction(llvm::StringRef MangledName,
   assert(F->getName() == MangledName && "name was uniqued!");
   if (D.getDecl())
     SetFunctionAttributes(D, F, IsIncompleteFunction);
+  if (ExtraAttrs != llvm::Attribute::None)
+    F->addFnAttr(ExtraAttrs);
 
   // This is the first use or definition of a mangled name.  If there is a
   // deferred decl with this name, remember that we need to emit it at the end
@@ -937,8 +946,10 @@ llvm::Constant *CodeGenModule::GetAddrOfFunction(GlobalDecl GD,
 /// type and name.
 llvm::Constant *
 CodeGenModule::CreateRuntimeFunction(const llvm::FunctionType *FTy,
-                                     llvm::StringRef Name) {
-  return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false);
+                                     llvm::StringRef Name,
+                                     llvm::Attributes ExtraAttrs) {
+  return GetOrCreateLLVMFunction(Name, FTy, GlobalDecl(), /*ForVTable=*/false,
+                                 ExtraAttrs);
 }
 
 static bool DeclIsConstantGlobal(ASTContext &Context, const VarDecl *D,
@@ -1997,6 +2008,7 @@ void CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) {
                              false, true, false, ObjCMethodDecl::Required);
     D->addInstanceMethod(DTORMethod);
     CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, DTORMethod, false);
+    D->setHasCXXStructors(true);
   }
 
   // If the implementation doesn't have any ivar initializers, we don't need
@@ -2015,6 +2027,7 @@ void CodeGenModule::EmitObjCIvarInitializations(ObjCImplementationDecl *D) {
                                                 ObjCMethodDecl::Required);
   D->addInstanceMethod(CTORMethod);
   CodeGenFunction(*this).GenerateObjCCtorDtorMethod(D, CTORMethod, true);
+  D->setHasCXXStructors(true);
 }
 
 /// EmitNamespace - Emit all declarations in a namespace.