[llvm] [PassManager] Add pretty stack frames (PR #96078)

[Nikita Popov via llvm-commits]

nikic wrote:

> I originally tried to improve this in [128745c](https://github.com/llvm/llvm-project/commit/128745cc2681c284bc6d0150a319673a6d6e8424) which did things a bit more complicated fashion. That approach turned out to be relatively expensive and was reverted and I never had time to get back to it. Would be good to check the compile-time impact just to be sure

Looks like there is close to no impact: https://llvm-compile-time-tracker.com/compare.php?from=60984f5be90d3f0378d739792adbd4c5e3dcc0e2&to=3d48d4932284fd29d0ede70f0ea6834a7c204d5e&stat=instructions:u 

https://github.com/llvm/llvm-project/pull/96078