RA best is NO_REGS

[Paulo J. Matos]

Hi,

I found a problem with my port where IRA generates a spill error. After 
looking at the logs I get this kind of output for the best class for the 
pseudo regs:

Pass 0 for finding pseudo/allocno costs

     a2 (r30,l0) best NO_REGS, allocno NO_REGS
     a3 (r29,l0) best NO_REGS, allocno NO_REGS
     a4 (r28,l0) best NO_REGS, allocno NO_REGS
     a5 (r27,l0) best NO_REGS, allocno NO_REGS
     a0 (r26,l0) best XL_REG, allocno XL_REG
     a1 (r20,l0) best AL_REG, allocno AL_REG


This doesn't look good. Why NO_REGS?

Cheers,
-- 
PMatos