[all-commits] [llvm/llvm-project] 40b637: [InstCombine] Add tests for indirect mul by power ...

[goldsteinn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 40b637f4604666c1388cbb5f19de55ead536a248
      https://github.com/llvm/llvm-project/commit/40b637f4604666c1388cbb5f19de55ead536a248
  Author: Noah Goldstein <goldstein.w.n at gmail.com>
  Date:   2023-04-07 (Fri, 07 Apr 2023)

  Changed paths:
    A llvm/test/Transforms/InstCombine/mul-pow2.ll

  Log Message:
  -----------
  [InstCombine] Add tests for indirect mul by power of 2; NFC

Differential Revision: https://reviews.llvm.org/D146346


  Commit: 513251b76582cf0d3ba81dfe36a05d452001b3b3
      https://github.com/llvm/llvm-project/commit/513251b76582cf0d3ba81dfe36a05d452001b3b3
  Author: Noah Goldstein <goldstein.w.n at gmail.com>
  Date:   2023-04-07 (Fri, 07 Apr 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp
    M llvm/test/Transforms/InstCombine/mul-pow2.ll

  Log Message:
  -----------
  [InstCombine] Improve transforms for `(mul X, Y)` -> `(shl X, log2(Y)`

Using the more robust log2 search allows us to fold more cases (same
logic as exists for idiv/irem).

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D146347


Compare: https://github.com/llvm/llvm-project/compare/f799901c06c0...513251b76582