[llvm-branch-commits] [llvm-remarkutil] Introduce filter command (PR #159784)

[Tobias Stadler via llvm-branch-commits]

https://github.com/tobias-stadler created https://github.com/llvm/llvm-project/pull/159784

Add a filter command to llvm-remarkutil. This can be used to extract
remarks for a certain function, pass, type, etc. from a large remarks
file to a new remarks file. This uses the same filter arguments as the
count command.

Depends on #156715. Thanks to this change, we don't need to buffer all
remarks before reserializing them, so we should be able to process
arbitrarily large files.