Issue warning when assigning out-of-range integer values to enums.

Due to performance cost, this is an opt-in option placed
under -Wassign-enum. // rdar://11824807

llvm-svn: 160382

1 files changed, 4 insertions, 1 deletions

diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index 34fb9d06a7a..915663e6221 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -9617,7 +9617,10 @@ bool Sema::DiagnoseAssignmentResult(AssignConvertType ConvTy,
   bool MayHaveFunctionDiff = false;
 
   switch (ConvTy) {
-  case Compatible: return false;
+  case Compatible:
+      DiagnoseAssignmentEnum(DstType, SrcType, SrcExpr);
+      return false;
+
   case PointerToInt:
     DiagKind = diag::ext_typecheck_convert_pointer_int;
     ConvHints.tryToFixConversion(SrcExpr, SrcType, DstType, *this);