PR ipa/61998 Fix crash -Wsuggest-final-types crash

-Wsuggest-final-types crashes when used on mininal testcases.
Fix by bailing out early when odr_types_ptr is NULL in ipa_devirt()

2014-09-19  Markus Trippelsdorf  <markus@trippelsdorf.de>

        PR ipa/61998
        * ipa-devirt.c (ipa_devirt): Bail out if odr_types_ptr is NULL.

2014-09-19  Markus Trippelsdorf  <markus@trippelsdorf.de>

        PR ipa/61998
        * g++.dg/warn/Wsuggest-final-2.C: New testcase.

From-SVN: r215392

gcc/ChangeLog

+2014-09-19  Markus Trippelsdorf  <markus@trippelsdorf.de>
+
+	PR ipa/61998
+	* ipa-devirt.c (ipa_devirt): Bail out if odr_types_ptr is NULL.
+
 2014-09-19  James Greenhalgh  <james.greenhalgh@arm.com>
 
 	* doc/md.texi (Modifiers): Consistently use "read/write"

gcc/ipa-devirt.c

@@ -3952,6 +3952,9 @@ ipa_devirt (void)
   int nmultiple = 0, noverwritable = 0, ndevirtualized = 0, nnotdefined = 0;
   int nwrong = 0, nok = 0, nexternal = 0, nartificial = 0;
 
+  if (!odr_types_ptr)
+    return 0;
+
   /* We can output -Wsuggest-final-methods and -Wsuggest-final-types warnings.
      This is implemented by setting up final_warning_records that are updated
      by get_polymorphic_call_targets.

gcc/testsuite/ChangeLog

+2014-09-19  Markus Trippelsdorf  <markus@trippelsdorf.de>
+
+	PR ipa/61998
+	* g++.dg/warn/Wsuggest-final-2.C: New testcase.
+
 2014-09-19  Joost VandeVondele  <vondele@gcc.gnu.org>
 
 	PR fortran/63152

gcc/testsuite/g++.dg/warn/Wsuggest-final-2.C

+// PR ipa/61998
+// { dg-do compile }
+// { dg-options "-O2 -Wsuggest-final-types" }
+int main () {}