Add a CastKind enum to CastExpr. Right now it's not used for much but it will be :)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77650 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaTemplateInstantiateExpr.cpp b/lib/Sema/SemaTemplateInstantiateExpr.cpp
index 31c184f..a09e24a 100644
--- a/lib/Sema/SemaTemplateInstantiateExpr.cpp
+++ b/lib/Sema/SemaTemplateInstantiateExpr.cpp
@@ -856,6 +856,7 @@
 
   ImplicitCastExpr *ICE = 
     new (SemaRef.Context) ImplicitCastExpr(E->getType(),
+                                           E->getCastKind(),
                                            (Expr *)SubExpr.release(),
                                            E->isLvalueCast());
   return SemaRef.Owned(ICE);