Tim Northover <t.p.northover at gmail.com> writes:
> Hi David,
>
>> If I have two physical registers, A and B, how do I know whether I may
>> replace A with B in a machine instruction
>
> It sounds like TargetInstrInfo::getRegClass is the function you want.
> The result has a "contains" method as you'd expect.
Ah, perfect! Thanks!
-David