[LLVMdev] getMinimalPhysRegClass

[Jakob Stoklund Olesen]

On May 14, 2012, at 1:02 PM, reed kotler wrote:

> I want to introduct a different register class for MIPS 16 but don't 
> want it to chose MIPS 16 when
> I'm compiling for MIPS 32.

I bet your problem is here:

  if (RC == &Mips::CPURegsRegClass)

Compare to:

  if (ARM::GPRRegClass.hasSubClassEq(RC)) {

It is usually wrong to test register class equality. You almost always want hasSubClassEq() instead.

/jakob