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-rw-r--r--lisp/emacs-lisp/byte-opt.el4
1 files changed, 4 insertions, 0 deletions
diff --git a/lisp/emacs-lisp/byte-opt.el b/lisp/emacs-lisp/byte-opt.el
index 5441083a8b2..5594b918b37 100644
--- a/lisp/emacs-lisp/byte-opt.el
+++ b/lisp/emacs-lisp/byte-opt.el
@@ -1151,6 +1151,10 @@
;;; state, so that constant folding them would be wrong,
;;; but we don't do constant folding based on this list.
+;;; However, at present the only optimization we normally do
+;;; is delete calls that need not occur, and we only do that
+;;; with the error-free functions.
+
;;; I wonder if I missed any :-\)
(let ((side-effect-free-fns
'(% * + - / /= 1+ 1- < <= = > >= abs acos append aref ash asin atan