address PR6502 by downgrading the scope checker's address

of label error to a warning controllable with a -W flag.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97815 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/DiagnosticSemaKinds.td

@@ -1589,9 +1589,9 @@ def err_switch_into_protected_scope : Error<
   "illegal switch case into protected scope">;
 def err_indirect_goto_in_protected_scope : Error<
   "illegal indirect goto in protected scope, unknown effect on scopes">;
-def err_addr_of_label_in_protected_scope : Error<
+def err_addr_of_label_in_protected_scope : Warning<
   "address taken of label in protected scope, jump to it would have "
-  "unknown effect on scope">;
+  "unknown effect on scope">, InGroup<DiagGroup<"label-address-scope">>;
 def note_protected_by_variable_init : Note<
   "jump bypasses variable initialization">;
 def note_protected_by_vla_typedef : Note<

test/Sema/scope-check.c

@@ -146,7 +146,7 @@ L4:
   
   void *Ptrs[] = {
     &&L2,   // Ok.
-    &&L3   // expected-error {{address taken of label in protected scope, jump to it would have unknown effect on scope}}
+    &&L3   // expected-warning {{address taken of label in protected scope, jump to it would have unknown effect on scope}}
   };
 }