Fix <rdar://problem/5986833> clang on xcode: incompatible type returning 'void', expected 'int'.

- Changed Sema::ObjCActOnStartOfMethodDef() to more accurately type "self" in factory methods.
- Changed Sema::ActOnInstanceMessage() to use the new type to restrict the lookup.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@52005 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclObjC.cpp b/lib/Sema/SemaDeclObjC.cpp
index 795e356..3117f87 100644
--- a/lib/Sema/SemaDeclObjC.cpp
+++ b/lib/Sema/SemaDeclObjC.cpp
@@ -42,15 +42,17 @@
   // Insert the invisible arguments, self and _cmd!
   PI.Ident = &Context.Idents.get("self");
   PI.IdentLoc = SourceLocation(); // synthesized vars have a null location.
-  QualType selfTy = Context.getObjCIdType();
+  QualType selfTy;
   if (MDecl->isInstance()) {
+    selfTy = Context.getObjCIdType();
     if (ObjCInterfaceDecl *OID = MDecl->getClassInterface()) {
       // There may be no interface context due to error in declaration of the 
       // interface (which has been reported). Recover gracefully
       selfTy = Context.getObjCInterfaceType(OID);
       selfTy = Context.getPointerType(selfTy);
     }
-  }
+  } else // we have a factory method.
+    selfTy = Context.getObjCClassType();
   CurMethodDecl->setSelfDecl(CreateImplicitParameter(FnBodyScope, PI.Ident, 
                                                      PI.IdentLoc, selfTy));