Fix segfault in free_growth_caches (PR jit/80954)

gcc/ChangeLog:
	PR jit/80954
	* ipa-inline-analysis.c (free_growth_caches): Set
	edge_removal_hook_holder to NULL after removing it.

From-SVN: r248841

gcc/ChangeLog

+2017-06-02  David Malcolm  <dmalcolm@redhat.com>
+
+	PR jit/80954
+	* ipa-inline-analysis.c (free_growth_caches): Set
+	edge_removal_hook_holder to NULL after removing it.
+
 2017-06-02  Sudakshina Das  <sudi.das@arm.com>
 
 	* config/aarch64/aarch64.c (aarch64_select_cc_mode): Return CC_SWP for

gcc/ipa-inline-analysis.c

@@ -110,7 +110,10 @@ void
 free_growth_caches (void)
 {
   if (edge_removal_hook_holder)
-    symtab->remove_edge_removal_hook (edge_removal_hook_holder);
+    {
+      symtab->remove_edge_removal_hook (edge_removal_hook_holder);
+      edge_removal_hook_holder = NULL;
+    }
   edge_growth_cache.release ();
 }