Re: Understanding IRA

[Jeff Law]

On 11/06/09 05:53, Dave Hudson wrote:
  the most
critical thing was to ensure that REGNO_REG_CLASS was returning a
minimal class correctly.
I believe that's been documented as the right thing to do for about 15 
years :-)   So, yes, you definitely want REGNO_REG_CLASS to return the 
smallest class to which a register belongs.

Jeff