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diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index d9f4c3c3ea2..c2731530e57 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,13 @@
+2011-02-27  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+        * emacs-lisp/pcase.el (pcase--if): Try to invert test to reduce depth.
+        (pcase-mutually-exclusive-predicates): New var.
+        (pcase--split-consp, pcase--split-pred): Use it.
+        (pcase--split-equal, pcase--split-member): When splitting against
+        a pure predicate, run it to know the outcome.
+        (pcase--u1): Mark vars that are actually used.
+        (pcase--q1): Avoid introducing unused vars.
+
 2011-02-27  Jay Belanger  <jay.p.belanger@gmail.com>
 
         * calc/calc-ext.el (calc-init-extensions):