diff --git a/array.c b/array.c
index 8e24da2ce6..e21c01194c 100644
--- a/array.c
+++ b/array.c
@@ -515,11 +515,11 @@ VALUE
 }
 
 VALUE
-rb_ary_new_from_values(long n, const VALUE *elts)
+rb_ary_tmp_new_from_values(VALUE klass, long n, const VALUE *elts)
 {
     VALUE ary;
 
-    ary = rb_ary_new2(n);
+    ary = ary_new(klass, n);
     if (n > 0 && elts) {
 	ary_memcpy(ary, 0, n, elts);
 	ARY_SET_LEN(ary, n);
@@ -528,6 +528,12 @@ rb_ary_new_from_values(long n, const VALUE *elts)
     return ary;
 }
 
+VALUE
+rb_ary_new_from_values(long n, const VALUE *elts)
+{
+    return rb_ary_tmp_new_from_values(rb_cArray, n, elts);
+}
+
 VALUE
 rb_ary_tmp_new(long capa)
 {
diff --git a/insns.def b/insns.def
index 45dab0a927..a056b221d5 100644
--- a/insns.def
+++ b/insns.def
@@ -388,11 +388,8 @@ toregexp
 (VALUE val) // inc += 1 - cnt;
 {
     VALUE rb_reg_new_ary(VALUE ary, int options);
-    rb_num_t i;
-    const VALUE ary = rb_ary_tmp_new(cnt);
-    for (i = 0; i < cnt; i++) {
-	rb_ary_store(ary, cnt-i-1, TOPN(i));
-    }
+    VALUE rb_ary_tmp_new_from_values(VALUE, long, const VALUE *);
+    const VALUE ary = rb_ary_tmp_new_from_values(0, cnt, STACK_ADDR_FROM_TOP(cnt));
     POPN(cnt);
     val = rb_reg_new_ary(ary, (int)opt);
     rb_ary_clear(ary);