Scheduling complete loop unrolling early and unconditional?

[Richard Guenther]

On Thu, 16 Dec 2004, Diego Novillo wrote:

> Richard Guenther wrote:
>
> > Therefore, is it possible to schedule either complete unrolling
> > of loops very early (before sra), or to schedule another sra
> > run after loop optimizations (that's what I'll try at the moment,
> > but possibly mess everything up)?
> >
> Scheduling SRA after loop optimizations sounds better.  SRA should be
> able to run more than once.

Will another loop pass with just

  p = &pass_loop2.sub;
  NEXT_PASS (pass_loop_init);
  NEXT_PASS (pass_complete_unroll);
  NEXT_PASS (pass_loop_done);
  *p = NULL;

not work?  Will it need a pass_iv_canon before pass_complete_unroll?
I'd schedule pass_loop2 after the first run of dce.  That should be
cheaper than running sra twice perhaps.

Richard.