Fix leak in tree-ssa-loop-prefetch.c

	* tree-ssa-loop-prefetch.c (determine_loop_nest_reuse): Use
	auto_vec instead of vec.

From-SVN: r236465

gcc/ChangeLog

 2016-05-19  Martin Liska  <mliska@suse.cz>
 
+	* tree-ssa-loop-prefetch.c (determine_loop_nest_reuse): Use
+	auto_vec instead of vec.
+
+2016-05-19  Martin Liska  <mliska@suse.cz>
+
 	* lto-section-in.c (lto_get_section_data): Call
 	lto_check_version with additional argument.
 	* lto-streamer.c (lto_check_version): Add new argument.

gcc/tree-ssa-loop-prefetch.c

@@ -1546,7 +1546,7 @@ determine_loop_nest_reuse (struct loop *loop, struct mem_ref_group *refs,
   vec<ddr_p> dependences = vNULL;
   struct mem_ref_group *gr;
   struct mem_ref *ref, *refb;
-  vec<loop_p> vloops = vNULL;
+  auto_vec<loop_p> vloops;
   unsigned *loop_data_size;
   unsigned i, j, n;
   unsigned volume, dist, adist;