Enable scheduler of GCC

[Le Ton Chanh]

I am a beginner in porting GCC. I have defined an automata for sheduling of my port. But it seems not to run. 
When configuring, I used the option '--with-schedule' and '--enable-haifa'. 
When using gcc-cross, I used the option '-fschedule-insns', '-fschedule-insns2' and I tried to dump debug infomation of scheduling by '-dS' and -'dR' but it generated nothing. I am using GCC 3.3.4 for my port.
Please help me to enable the scheduler and generate scheduling debug information.

Le Ton Chanh 
email:letonchanh@yahoo.com