report duplicate case values.  TODO: report duplicate/overlapping ranges.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41315 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/switch.c b/test/Sema/switch.c
index 8559e0d..ce195b1 100644
--- a/test/Sema/switch.c
+++ b/test/Sema/switch.c
@@ -8,8 +8,9 @@
 
 void foo(int X) {
   switch (X) {
+  case 42: ;          // expected-error {{previous case value}}
   case 5000000000LL:  // expected-warning {{overflow}}
-  case 42:
+  case 42:            // expected-error {{duplicate case value}}
    ;
   }
 }