[PATCH] D147428: [LoongArch] Optimize multiplication with immediates

[Ben Shi via Phabricator via llvm-commits]

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Optimize (mul r, c) to (SLLI (ALSL r, i0), i1), in which
c = (1 + (1 << i0)) << i1.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147428

Files:
  llvm/lib/Target/LoongArch/LoongArchInstrInfo.td
  llvm/test/CodeGen/LoongArch/ir-instruction/mul.ll

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