objc: introduce objc_suppress_autosynthesis class

attributes for later use.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147457 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 16 insertions, 0 deletions

diff --git a/lib/Sema/AttributeList.cpp b/lib/Sema/AttributeList.cpp
index 13a0edec28..a8ccbb1f56 100644
--- a/lib/Sema/AttributeList.cpp
+++ b/lib/Sema/AttributeList.cpp
@@ -108,6 +108,7 @@ AttributeList::Kind AttributeList::getKind(const IdentifierInfo *Name) {
     .Case("weak", AT_weak)
     .Case("weakref", AT_weakref)
     .Case("objc_arc_weak_reference_unavailable", AT_arc_weakref_unavailable)
+    .Case("objc_suppress_autosynthesis", AT_objc_suppress_autosynthesis)
     .Case("pure", AT_pure)
     .Case("mode", AT_mode)
     .Case("used", AT_used)
diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index 1626bf14b6..4074afee1c 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -1579,6 +1579,18 @@ static void handleArcWeakrefUnavailableAttr(Sema &S, Decl *D,
                                           Attr.getRange(), S.Context));
 }
 
+static void handleObjCSuppressAutosynthesisAttr(Sema &S, Decl *D, 
+                                            const AttributeList &Attr) {
+  unsigned NumArgs = Attr.getNumArgs();
+  if (NumArgs > 0) {
+    S.Diag(Attr.getLoc(), diag::err_attribute_too_many_arguments) << 0;
+    return;
+  }
+  
+  D->addAttr(::new (S.Context) ObjCSuppressAutosynthesisAttr(
+                                 Attr.getRange(), S.Context));
+}
+
 static void handleAvailabilityAttr(Sema &S, Decl *D,
                                    const AttributeList &Attr) {
   IdentifierInfo *Platform = Attr.getParameterName();
@@ -3603,6 +3615,9 @@ static void ProcessInheritableDeclAttr(Sema &S, Scope *scope, Decl *D,
   case AttributeList::AT_arc_weakref_unavailable: 
     handleArcWeakrefUnavailableAttr (S, D, Attr); 
     break;
+  case AttributeList::AT_objc_suppress_autosynthesis: 
+    handleObjCSuppressAutosynthesisAttr (S, D, Attr); 
+    break;
   case AttributeList::AT_unused:      handleUnusedAttr      (S, D, Attr); break;
   case AttributeList::AT_returns_twice:
     handleReturnsTwiceAttr(S, D, Attr);