[llvm] [DebugCounter] Add support for non-continous ranges. (PR #89470)

[Nico Weber via llvm-commits]

nico wrote:

Any chance this could've caused http://45.33.8.238/linux/139041/step_11.txt ? There's nothing else in the regression range for the failure really.

https://github.com/llvm/llvm-project/pull/89470