[PATCH] D111141: [RISCV] Optimize (add (mul r, c0), c1)

[Ben Shi via Phabricator via llvm-commits]

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  Optimize (add (mul x, c0), c1) ->
           (add (mul (add x, c1/c0+1), c0), c1%c0-c0),
  if c1/c0+1 and c1%c0-c0 are simm12, while c1 is not.
  
  Optimize (add (mul x, c0), c1) ->
           (add (mul (add x, c1/c0-1), c0), c1%c0+c0),
  if c1/c0-1 and c1%c0+c0 are simm12, while c1 is not.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D111141

Files:
  llvm/test/CodeGen/RISCV/addimm-mulimm.ll

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