regmove and regclasses

[James E Wilson]

Steven Bosscher wrote:
> I'm probably overlooking something trivial, but...  where does
> regmove get its regclasses from?

The register class support was added here:

Sat Jan 10 21:50:16 1998  J"orn Rennecke  <amylaar@cygnus.co.uk>
                           Jeffrey A Law  (law@cygnus.com)
 

         * regmove.c: New implementation of regmove pass.
	...

and it looks like it has never done anything useful in the FSF tree. 
There was perhaps an extra regclass call before the regmove call 
somewhere that got lost when the code was moved from the Cygnus tree to 
the FSF tree.  Or maybe regmove used to be called after regclass, and 
got moved before the scheduler so that we could schedule the extra moves 
it emitted, and no one noticed that this broke the code using register 
classes.  It is hard to say at this point, without access to the Cygnus 
internal tree.
-- 
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com