[LLVMdev] [LLVMDev] [Question] The TargetRegisterClass has a confusing method.

Jeff Kunkel jdkunk3 at gmail.com
Tue Aug 31 12:26:15 PDT 2010

The method below takes in a register and returns a register. To me this
makes no sense because
when I already have a register, why would I need to get it? Could someone
please explain the
transformation that is happening here?

  /// getRegister - Return the specified register in the class.
  unsigned getRegister(unsigned i) const {
    assert(i < getNumRegs() && "Register number out of range!");
    return RegsBegin[i];
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