[PATCH] D102893: [RISCV] Optimize xor/or with immediate in the zbs extension

[Jessica Clarke via Phabricator via llvm-commits]

jrtc27 added a comment.

Given how messy this is becoming and the amount of duplicated code for what are very similar patterns, does this not just want to be custom lowering? TableGen is starting to feel like the wrong tool for this.

Also, just a side thought: how does all this interact with using the integers for things like load or store offsets? Do we end up not being able to fold an immediate into the load/store as a result of some of these optimisations and thus lose out overall on large-offset addressing when B is enabled?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D102893/new/

https://reviews.llvm.org/D102893