diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7f90b72b83e..a00bff33482 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2017-12-11  Bin Cheng  <bin.cheng@arm.com>
+
+	PR tree-optimization/83320
+	* gimple-loop-interchange.cc (free_data_refs_with_aux): Use delete.
+	(prune_datarefs_not_in_loop): Ditto.
+
 2017-12-10  Gerald Pfeifer  <gerald@pfeifer.com>
 
 	* doc/install.texi (Specific): Tweak link to mkssoftware.com.
diff --git a/gcc/gimple-loop-interchange.cc b/gcc/gimple-loop-interchange.cc
index 301b511cdad..e80e65c69da 100644
--- a/gcc/gimple-loop-interchange.cc
+++ b/gcc/gimple-loop-interchange.cc
@@ -945,7 +945,7 @@ free_data_refs_with_aux (vec<data_reference_p> datarefs)
     if (dr->aux != NULL)
       {
 	DR_ACCESS_STRIDE (dr)->release ();
-	free (dr->aux);
+	delete (vec<tree> *) dr->aux;
       }
 
   free_data_refs (datarefs);
@@ -1867,7 +1867,7 @@ prune_datarefs_not_in_loop (struct loop *loop, vec<data_reference_p> datarefs)
 	  if (dr->aux)
 	    {
 	      DR_ACCESS_STRIDE (dr)->release ();
-	      free (dr->aux);
+	      delete (vec<tree> *) dr->aux;
 	    }
 	  free_data_ref (dr);
 	}