[llvm-branch-commits] [llvm] [TRI] Remove reserved registers in getRegPressureSetLimit (PR #211743)

[Nathan Corbyn via llvm-branch-commits]

https://github.com/cofibrant approved this pull request.

I'm not sure I follow the intent of this change. The PR description makes it sound like an NFC, but in moving `computePSetLimit()` into `TargetRegisterInfo`, you've also starting consulting `getRawAllocationOrder()`, causing the (enormous) test diff. I think, at the very least, this patch wants splitting in two: one patch to do the refactor, the other to add the expensive new logic.

https://github.com/llvm/llvm-project/pull/211743