sub cmp { $_[0] <=> $_[1] };;

Dump( \&cmp );;
SV = RV(0x2762e8) at 0x2762d8
  REFCNT = 1
  FLAGS = (TEMP,ROK)
  RV = 0x3c72858
  SV = PVCV(0x3c5a028) at 0x3c72858
    REFCNT = 2
    FLAGS = ()
    COMP_STASH = 0x36bde0       "main"
    START = 0x3d0ef48 ===> 0
    ROOT = 0x3d0eed0
    GVGV::GV = 0x3c721f8        "main" :: "cmp"
    FILE = "(eval 9)"
    DEPTH = 0
    FLAGS = 0x0
    OUTSIDE_SEQ = 1935
    PADLIST = 0x3c72840
    PADNAME = 0x3c72828(0x3cf7358) PAD = 0x3c72210(0x3cf7618)
    OUTSIDE = 0x36beb8 (UNIQUE)