[objc] Emit a warning when the implementation of a designated initializer does not chain to

an init method that is a designated initializer for the superclass.

llvm-svn: 196316

1 files changed, 10 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaExprObjC.cpp b/clang/lib/Sema/SemaExprObjC.cpp
index a60749b0224..20f4b4f7248 100644
--- a/clang/lib/Sema/SemaExprObjC.cpp
+++ b/clang/lib/Sema/SemaExprObjC.cpp
@@ -2447,6 +2447,16 @@ ExprResult Sema::BuildInstanceMessage(Expr *Receiver,
     }
   }
 
+  if (SuperLoc.isValid() && getCurFunction()->ObjCIsDesignatedInit) {
+    if (const ObjCObjectPointerType *
+          OCIType = ReceiverType->getAsObjCInterfacePointerType()) {
+      if (const ObjCInterfaceDecl *ID = OCIType->getInterfaceDecl()) {
+        if (ID->isDesignatedInitializer(Sel))
+          getCurFunction()->ObjCWarnForNoDesignatedInitChain = false;
+      }
+    }
+  }
+
   // Check the message arguments.
   unsigned NumArgs = ArgsIn.size();
   Expr **Args = ArgsIn.data();