Tomas Matheson 18dbe68978 [ARM][NFC] Tidy up subtarget frame pointer routines ...

getFramePointerReg only depends on information in ARMSubtarget,
so move it in there so it can be accessed from more places.

Make use of ARMSubtarget::getFramePointerReg to remove duplicated code.

The main use of useR7AsFramePointer is getFramePointerReg, so inline it.

Differential Revision: https://reviews.llvm.org/D104476

2021-06-19 17:00:45 +01:00

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