[PATCH] D118020: [RISCV] Set CostPerUse for floating point registers

[Alex Bradbury via Phabricator via llvm-commits]

asb added a comment.

I'm surprised this resulted in performance increases. I might have guessed that with so few FP instructions being compressible, the further constraint on register selection might be more likely to result in a (slight) decrease in performance. Shows the value of running the benchmarks!

I've put this patch on the agenda for the RISC-V LLVM call today, but based on the data so far this seems to make sense.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D118020/new/

https://reviews.llvm.org/D118020