[PR 71234] Avoid valgrind warning in ipa-cp

2016-05-23  Martin Jambor  <mjambor@suse.cz>

	PR ipa/71234
	* ipa-cp.c (ipa_get_indirect_edge_target_1): Only check value of
	from_global_constant if t is not NULL.

From-SVN: r236598

gcc/ChangeLog

+2016-05-23  Martin Jambor  <mjambor@suse.cz>
+
+	PR ipa/71234
+	* ipa-cp.c (ipa_get_indirect_edge_target_1): Only check value of
+	from_global_constant if t is not NULL.
+
 2016-05-23  Marek Polacek  <polacek@redhat.com>
 
 	PR c/49859

gcc/ipa-cp.c

@@ -2027,7 +2027,8 @@ ipa_get_indirect_edge_target_1 (struct cgraph_edge *ie,
 					      ie->indirect_info->offset,
 					      ie->indirect_info->by_ref,
 					      &from_global_constant);
-	      if (!from_global_constant
+	      if (t
+		  && !from_global_constant
 		  && !ie->indirect_info->guaranteed_unmodified)
 		t = NULL_TREE;
 	    }