range.c: call range_include directly if possible

* range.c (range_eqq): trivial optimization to jump to
  range_include directly if the method is not redefined.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51585 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

range.c

@@ -23,6 +23,7 @@ static ID id_beg, id_end, id_excl, id_integer_p, id_div;
 #define id_succ idSucc
 
 static VALUE r_cover_p(VALUE, VALUE, VALUE, VALUE);
+static VALUE range_include(VALUE range, VALUE val);
 
 #define RANGE_BEG(r) (RSTRUCT(r)->as.ary[0])
 #define RANGE_END(r) (RSTRUCT(r)->as.ary[1])
@@ -1134,7 +1135,12 @@ range_inspect(VALUE range)
 static VALUE
 range_eqq(VALUE range, VALUE val)
 {
-    return rb_funcall(range, rb_intern("include?"), 1, val);
+    ID pred;
+    CONST_ID(pred, "include?");
+    if (rb_method_basic_definition_p(RBASIC_CLASS(range), pred)) {
+	return range_include(range, val);
+    }
+    return rb_funcall(range, pred, 1, val);
 }