[llvm] [MIR] Serialize MachineFrameInfo::isCalleeSavedInfoValid() (PR #90561)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm commented:

Needs a parsing test where this is true. Can you also add one that hit the issue you described? Can we just print the empty list in this case? 

https://github.com/llvm/llvm-project/pull/90561