[all-commits] [llvm/llvm-project] 141892: [InstCombine] add tests for low-mask of ashr; NFC

[Sanjay Patel via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 141892d481fcf446c9bf1ae5fb600d797295debc
      https://github.com/llvm/llvm-project/commit/141892d481fcf446c9bf1ae5fb600d797295debc
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2022-04-11 (Mon, 11 Apr 2022)

  Changed paths:
    M llvm/test/Transforms/InstCombine/and.ll

  Log Message:
  -----------
  [InstCombine] add tests for low-mask of ashr; NFC


  Commit: 7783db55afefd3b0d83f4d1b727b6aaa2c2286d6
      https://github.com/llvm/llvm-project/commit/7783db55afefd3b0d83f4d1b727b6aaa2c2286d6
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2022-04-11 (Mon, 11 Apr 2022)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
    M llvm/test/Transforms/InstCombine/and.ll

  Log Message:
  -----------
  [InstCombine] try to fold low-mask of ashr to lshr

With one-use, we handle this via demanded-bits.
But We need to handle extra uses to improve issue #54750.

https://alive2.llvm.org/ce/z/aDYkPv


Compare: https://github.com/llvm/llvm-project/compare/1ddc719680c2...7783db55afef