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

[Mikhail R. Gadelha via llvm-commits]

mikhailramalho wrote:

> 
> Counter support is planned in the next pr.
> 
> This error really exists, it is because there was a request to separately take out support for loading instructions.This only happens on LB and LD instructions. Pr (#113458) fixes it. This pr will be uploaded on top of the current one with the necessary testing.

Thanks, @AnastasiyaChernikova, I had missed that PR.

I just cherry-picked that PR on top of this one and got no crashes. There were some missing instructions but we can get that in a separate PR.

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