[LLVMdev] Getting the Stack Pointer

[David Greene]

What's the "right" way to find out which machine register acts as the
stack pointer?  I'm working on enhancing Fernando's register allocator 
debugger and would like to add support for stack pointer semantics.

TargetRegisterInfo has a getFrameRegister method but that returns
(on x86) either ESP/RSP or EBP/RBP depending on whether frame
pointer elimination has been done.

Would it be ok to add a getStackPointerRegister method to TargetRegisterInfo?

                                           -Dave