[llvm] [RISCV] Add late optimization pass for RISC-V to optimize branch instructions (PR #131728)

[Mikhail R. Gadelha via llvm-commits]

mikhailramalho wrote:

> 
> @mikhailramalho so what I'm hearing is that we should count this as a pretty nice gain in xz? I know xalancbmk usually has high variance too, but this looks quite large.

I'd say we can trust the results of xz and parest, they were consistent across the two full runs I did.

> 
> Does #117060 also improve xz?

I didn't test it back then, so I don't know :/

https://github.com/llvm/llvm-project/pull/131728