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.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133103 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 22 insertions, 2 deletions

diff --git a/lib/AST/DeclObjC.cpp b/lib/AST/DeclObjC.cpp
index e2c4f38ff9..99eb0d386b 100644
--- a/lib/AST/DeclObjC.cpp
+++ b/lib/AST/DeclObjC.cpp
@@ -474,8 +474,28 @@ void ObjCMethodDecl::createImplicitParams(ASTContext &Context,
   } else // we have a factory method.
     selfTy = Context.getObjCClassType();
 
-  setSelfDecl(ImplicitParamDecl::Create(Context, this, SourceLocation(),
-                                        &Context.Idents.get("self"), selfTy));
+  bool selfIsConsumed = false;
+  if (isInstanceMethod() && Context.getLangOptions().ObjCAutoRefCount) {
+    selfIsConsumed = hasAttr<NSConsumesSelfAttr>();
+
+    // 'self' is always __strong, although as a special case we don't
+    // actually retain it except in init methods.
+    Qualifiers qs;
+    qs.setObjCLifetime(Qualifiers::OCL_Strong);
+    selfTy = Context.getQualifiedType(selfTy, qs);
+
+    // In addition, 'self' is const unless this is an init method.
+    if (getMethodFamily() != OMF_init)
+      selfTy = selfTy.withConst();
+  }
+
+  ImplicitParamDecl *self
+    = ImplicitParamDecl::Create(Context, this, SourceLocation(),
+                                &Context.Idents.get("self"), selfTy);
+  setSelfDecl(self);
+
+  if (selfIsConsumed)
+    self->addAttr(new (Context) NSConsumedAttr(SourceLocation(), Context));
 
   setCmdDecl(ImplicitParamDecl::Create(Context, this, SourceLocation(),
                                        &Context.Idents.get("_cmd"),