On Wed, Sep 14, 2016 at 11:52:02AM -0600, Jeff Law wrote: > Yea, it'll certainly do that and I can imagine a design which would have > that property. And there's other designs which benefit from spreading > across the register file as much as possible. > > Which argues there needs to be a way to tune or disable the pass.
Yes, some targets want it, and some don't. It seems to me that targets that use sched1 have much less benefit from regrename. Of course enabling sched1 has its own problems. Segher
