[PATCH] D31955: MachineRegisterInfo: Add way to mark individual registers as used

[Matthias Braun via Phabricator via llvm-commits]

MatzeB requested changes to this revision.
MatzeB added a comment.
This revision now requires changes to proceed.

I think `UsedPhysRegMask` is supposed to be the union of all register mask operands in the function. It just functions as a cache there. Having a way to manually set/reset it seems wrong to me. What exactly do you want/need this for?


https://reviews.llvm.org/D31955