[LLVMdev] Live Intervals and Register Classes

[David Greene]

David Greene wrote:

> If I take the first LiveRange LR from LI, look up its
> instruction/operand at "start" and then look at its
> TargetOperandInfo and send TOI::RegClass to
> MRegisterInfo:getRegClass, is that sufficient.
> 
> It seems way overly complicated.

Umm...yeah.  That way be dragons.  :-/

Fortunately, I found
MachineFunction::getSSARegMap()->getRegClass(LI.reg) which
works swimmingly.

                              -Dave