Help: does define_peephole still work in gcc-4.2.4

[Amker.Cheng]

Hi all:
     Currently I am studying peephole optimization in gcc.
I defined a peephole using "define_peephole", but nothing happened.
It seems gcc does do the pattern match work in codes surrounded by
"HAVE_peephole",
but codes from "out-template" in that "define_peephole" are not
compiled into gcc at all.

I know "define_peephole" is deprecated, so not sure about whether
define_peephole still works in gcc-4.2.4,
or I just missed something important?

Thanks, any tips will be appreciated!
--
Best Regards.