[llvm] [RISCV][llvm-exegesis] Disable pseudo instructions in allowAsBackToBack. (PR #122986)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 approved this pull request.

LGTM.

Wondering if we should rename `allowAsBackToBack` to something more clear to those implementing targets... Anyways, that's besides the point and I can clean it up later if it makes sense.

https://github.com/llvm/llvm-project/pull/122986