[llvm] [LLVM] Add HasFakeUses to MachineFunction (PR #110097)

[Stephen Tozer via llvm-commits]

SLTozer wrote:

> I don't think it's an issue to track this, but it needs the auto detection

Agreed on the auto detection, I've just been verifying it's fine for post-RA scheduling to be enabled with fake uses, which looks to be the case - added the property inference and enabled post-RA scheduling in the latest update.

https://github.com/llvm/llvm-project/pull/110097