[LLVMdev] getMinimalPhysRegClass

[Reed Kotler]

Does anyone understand the purpose of this target inpdendent function?

By adding a new register class that is for MIPS16 but not even 
referencing it, the compiler breaks because of this code.

def CPU16Regs : RegisterClass<"Mips", [i32], 32, (add
   // Return Values and Arguments
   V0, V1, A0, A1, A2, A3,
   // Callee save
   S0, S1
  )>;

I'm trying to understand how the Arm compiler avoids this problem.

But still, what is the logic here?

Tia.

Reed