[PATCH] D105796: [RISCV] Optimize multiplication in the zba extension with SH*ADD

[Ben Shi via Phabricator via llvm-commits]

benshi001 added a comment.

I have split previous patch to smaller ones, which would be easy to review. And current patch only contains

  (mul x, 3 * power_of_2) -> (SLLI (SH1ADD x, x), bits)
  (mul x, 5 * power_of_2) -> (SLLI (SH2ADD x, x), bits)
  (mul x, 9 * power_of_2) -> (SLLI (SH3ADD x, x), bits)


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D105796/new/

https://reviews.llvm.org/D105796