Simplify make-list implementation

* src/alloc.c (Fmake_list): Don’t unroll loop, as the complexity
is not worth it these days.

1 files changed, 3 insertions, 33 deletions

diff --git a/src/alloc.c b/src/alloc.c
index 1a6d4e2d565..f7da7e44f29 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -2872,44 +2872,14 @@ usage: (list &rest OBJECTS)  */)
 
 DEFUN ("make-list", Fmake_list, Smake_list, 2, 2, 0,
        doc: /* Return a newly created list of length LENGTH, with each element being INIT.  */)
-  (register Lisp_Object length, Lisp_Object init)
+  (Lisp_Object length, Lisp_Object init)
 {
-  register Lisp_Object val;
-  register EMACS_INT size;
-
+  Lisp_Object val = Qnil;
   CHECK_NATNUM (length);
-  size = XFASTINT (length);
 
-  val = Qnil;
-  while (size > 0)
+  for (EMACS_INT size = XFASTINT (length); 0 < size; size--)
     {
       val = Fcons (init, val);
-      --size;
-
-      if (size > 0)
-        {
-          val = Fcons (init, val);
-          --size;
-
-          if (size > 0)
-            {
-              val = Fcons (init, val);
-              --size;
-
-              if (size > 0)
-                {
-                  val = Fcons (init, val);
-                  --size;
-
-                  if (size > 0)
-                    {
-                      val = Fcons (init, val);
-                      --size;
-                    }
-                }
-            }
-        }
-
       QUIT;
     }