;; The sequence:
;;   sbc a, a   ; A is either 0 or -1
;;   sub 1
;;   sbc a, a
;;   neg
;; can be replaced by
;;   sbc a, a   ; A is either 0 or -1
;;   inc a

OLEVEL: 1
OFLAG: 24

REPLACE {{
  sbc a, a
  sub 1
  sbc a, a
  neg
}}

WITH {{
  sbc a, a
  inc a
}}
