diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2a4979e04326..92bd5ba1a0f9 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2018-07-31  Richard Sandiford  <richard.sandiford@arm.com>
+
+	* tree-vectorizer.h (vect_stmt_in_region_p): Delete.
+	* tree-vectorizer.c (vect_stmt_in_region_p): Likewise.
+
 2018-07-31  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* tree-vectorizer.h (vec_info::new_vinfo_for_stmt)
diff --git a/gcc/tree-vectorizer.c b/gcc/tree-vectorizer.c
index 579f43579be8..44a0c4d1ce5d 100644
--- a/gcc/tree-vectorizer.c
+++ b/gcc/tree-vectorizer.c
@@ -711,33 +711,6 @@ vect_free_loop_info_assumptions (struct loop *loop)
   loop_constraint_clear (loop, LOOP_C_FINITE);
 }
 
-/* Return whether STMT is inside the region we try to vectorize.  */
-
-bool
-vect_stmt_in_region_p (vec_info *vinfo, gimple *stmt)
-{
-  if (!gimple_bb (stmt))
-    return false;
-
-  if (loop_vec_info loop_vinfo = dyn_cast <loop_vec_info> (vinfo))
-    {
-      struct loop *loop = LOOP_VINFO_LOOP (loop_vinfo);
-      if (!flow_bb_inside_loop_p (loop, gimple_bb (stmt)))
-	return false;
-    }
-  else
-    {
-      bb_vec_info bb_vinfo = as_a <bb_vec_info> (vinfo);
-      if (gimple_bb (stmt) != BB_VINFO_BB (bb_vinfo)
-	  || gimple_uid (stmt) == -1U
-	  || gimple_code (stmt) == GIMPLE_PHI)
-	return false;
-    }
-
-  return true;
-}
-
-
 /* If LOOP has been versioned during ifcvt, return the internal call
    guarding it.  */
 
diff --git a/gcc/tree-vectorizer.h b/gcc/tree-vectorizer.h
index d88ea2be0459..717d3733d2e7 100644
--- a/gcc/tree-vectorizer.h
+++ b/gcc/tree-vectorizer.h
@@ -1628,7 +1628,6 @@ void vect_pattern_recog (vec_info *);
 
 /* In tree-vectorizer.c.  */
 unsigned vectorize_loops (void);
-bool vect_stmt_in_region_p (vec_info *, gimple *);
 void vect_free_loop_info_assumptions (struct loop *);
 
 #endif  /* GCC_TREE_VECTORIZER_H  */