[all-commits] [llvm/llvm-project] 65e057: [RISCV] Expand mul X, C where C=2^N*(3, 5, 9)*(3, 5, 9...

[Philip Reames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 65e0574076b86fd5adb432387c23ce9954fb95c4
      https://github.com/llvm/llvm-project/commit/65e0574076b86fd5adb432387c23ce9954fb95c4
  Author: Philip Reames <preames at rivosinc.com>
  Date:   2024-09-11 (Wed, 11 Sep 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/rv64zba.ll

  Log Message:
  -----------
  [RISCV] Expand mul X, C where C=2^N*(3,5,9)*(3,5,9) (#108100)

This is a three deep expression which is deeper than we've otherwise
gone for multiple expansions, but I think it's reasonable to do so. This
covers mul by 50, 100, and 200 which are reasonably common naturally
arising numbers.



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