[llvm] [CodeGen] Parse frame-pointer attribute once when creating MachineFunction (PR #191974)

[Alexis Engelke via llvm-commits]

aengelke wrote:

Where is this called so often? I vaguely remember looking into this 2 years ago and finding that hasFP (which does call this) was quite expensive and considered caching that. hasFPImpl also checks a lot of other things that are repeatedly queried in PEI, so there might be a larger impact by doing that? (Never got around to do it.)

https://github.com/llvm/llvm-project/pull/191974