Fix ICE in ipa-devirt

[Jan Hubicka]

Hi,
this patch fixes the second ICE exposed by the new testcase Marxin
added. Again the ODR warning needs work, so I commit it after getting
it right.

Bootstrapped/regtested x86_64-linux, comitted.

        PR lto/87957
        * ipa-devirt.c (free_enum_values): Do not ICE on ODR vilations.
Index: ipa-devirt.c
===================================================================
--- ipa-devirt.c        (revision 266235)
+++ ipa-devirt.c        (working copy)
@@ -2268,12 +2268,14 @@ free_enum_values ()
   enum_values_freed = true;
   unsigned int i;
   for (i = 0; i < odr_types.length (); i++)
-    if (odr_types[i] && TREE_CODE (odr_types[i]->type) == ENUMERAL_TYPE)
+    if (odr_types[i])
       {
-       TYPE_VALUES (odr_types[i]->type) = NULL;
+       if (TREE_CODE (odr_types[i]->type) == ENUMERAL_TYPE)
+         TYPE_VALUES (odr_types[i]->type) = NULL;
        if (odr_types[i]->types)
           for (unsigned int j = 0; j < odr_types[i]->types->length (); j++)
-           TYPE_VALUES ((*odr_types[i]->types)[j]) = NULL;
+           if (TREE_CODE ((*odr_types[i]->types)[j]) == ENUMERAL_TYPE)
+             TYPE_VALUES ((*odr_types[i]->types)[j]) = NULL;
       }
   enum_values_freed = true;
 }