When dynamic_cast'ing from a type to itself, fill in the cast kind
with CK_NoOp. Fixes PR7727.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@109757 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaCXXCast.cpp b/lib/Sema/SemaCXXCast.cpp
index 29e9051..519d569 100644
--- a/lib/Sema/SemaCXXCast.cpp
+++ b/lib/Sema/SemaCXXCast.cpp
@@ -396,6 +396,7 @@
   // C++ 5.2.7p3: If the type of v is the same as the required result type,
   //   [except for cv].
   if (DestRecord == SrcRecord) {
+    Kind = CastExpr::CK_NoOp;
     return;
   }