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diff --git a/test/src/comp-resources/comp-test-pure.el b/test/src/comp-resources/comp-test-pure.el
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+;;; comp-test-pure.el --- compilation unit tested by comp-tests.el -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2020-2022 Free Software Foundation, Inc.
+
+;; Author: Andrea Corallo <akrl@sdf.org>
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(defun comp-tests-pure-callee-f (x)
+  (1+ x))
+
+(defun comp-tests-pure-caller-f ()
+  (comp-tests-pure-callee-f 3))
+
+(defun comp-tests-pure-fibn-f (a b count)
+  (if (= count 0)
+      b
+    (comp-tests-pure-fibn-f (+ a b) a (- count 1))))
+
+(defun comp-tests-pure-fibn-entry-f ()
+  (comp-tests-pure-fibn-f 1 0 20))
+
+;;; comp-test-pure.el ends here