[llvm] [Exegesis][RISCV] Add RISCV support for llvm-exegesis (PR #89047)

[Mikhail R. Gadelha via llvm-commits]

mikhailramalho wrote:

@AnastasiyaChernikova I'm trying to run llvm-exegesis on the bananapi but I'm having trouble getting it to work as it's now. 

I saw you removed the perf counters tuff, do you plan to send a separate PR for that? Without libpfm support for riscv, I can't test the PR.


https://github.com/llvm/llvm-project/pull/89047