objc arc: Suppress certain arc diagnostics on unavailable

functions. // rdar://10186536


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141037 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index 79afbe538d..940f5a86a6 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -3904,6 +3904,17 @@ static void handleDelayedForbiddenType(Sema &S, DelayedDiagnostic &diag,
                         "this system declaration uses an unsupported type"));
     return;
   }
+  if (S.getLangOptions().ObjCAutoRefCount)
+    if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(decl)) {
+      // FIXME. we may want to supress diagnostics for all
+      // kind of forbidden type messages on unavailable functions. 
+      if (FD->hasAttr<UnavailableAttr>() &&
+          diag.getForbiddenTypeDiagnostic() == 
+          diag::err_arc_array_param_no_ownership) {
+        diag.Triggered = true;
+        return;
+      }
+    }
 
   S.Diag(diag.Loc, diag.getForbiddenTypeDiagnostic())
     << diag.getForbiddenTypeOperand() << diag.getForbiddenTypeArgument();