Question abt getting the number of available registers

[Revital Eres]

Hello,

I'm working on estimating register pressure in SMS and using
ira_available_class_regs for getting the number of available
registers.
However I encounter a case where ira_available_class_regs showed 64
available regs for a certain class while ira_class_hard_regs_num
showed 61 so I am not sure which one I should use. (I'm also not sure
if ira_class_hard_regs_num  can be used outside of ira-- if not, I
would need to do that calculation myself)

Thanks,
Revital