Fix memory leak in tree-if-conv.c

	* tree-if-conv.c (ifcvt_local_dce): Replace vec with auto_vec.

From-SVN: r231447

gcc/ChangeLog

 2015-12-09  Martin Liska  <mliska@suse.cz>
 
+	* tree-if-conv.c (ifcvt_local_dce): Replace vec with auto_vec.
+
+2015-12-09  Martin Liska  <mliska@suse.cz>
+
 	PR ipa/68790
 	* ipa-icf.c (sem_function::param_used_p): Return true
 	if ipa_node_params_sum equals to NULL.

gcc/tree-if-conv.c

@@ -2550,7 +2550,7 @@ ifcvt_local_dce (basic_block bb)
   gimple *stmt1;
   gimple *phi;
   gimple_stmt_iterator gsi;
-  vec<gimple *> worklist;
+  auto_vec<gimple *> worklist;
   enum gimple_code code;
   use_operand_p use_p;
   imm_use_iterator imm_iter;