[all-commits] [llvm/llvm-project] 9520fc: [InstCombine] add tests for sdiv-of-shl-1; NFC

[Sanjay Patel via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9520fca46e09742c1249da2b156f340762c84690
      https://github.com/llvm/llvm-project/commit/9520fca46e09742c1249da2b156f340762c84690
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2022-10-07 (Fri, 07 Oct 2022)

  Changed paths:
    M llvm/test/Transforms/InstCombine/sdiv-exact-by-power-of-two.ll

  Log Message:
  -----------
  [InstCombine] add tests for sdiv-of-shl-1; NFC


  Commit: 5e896628b74dcbe285da55278df7399085abdfd8
      https://github.com/llvm/llvm-project/commit/5e896628b74dcbe285da55278df7399085abdfd8
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2022-10-07 (Fri, 07 Oct 2022)

  Changed paths:
    M llvm/test/Transforms/InstCombine/ashr-lshr.ll

  Log Message:
  -----------
  [InstCombine] add tests for ashr exact; NFC


  Commit: 3e6767ed5f6d65300f0a7299a9d87944cb64eeb4
      https://github.com/llvm/llvm-project/commit/3e6767ed5f6d65300f0a7299a9d87944cb64eeb4
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2022-10-07 (Fri, 07 Oct 2022)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
    M llvm/test/Transforms/InstCombine/ashr-lshr.ll
    M llvm/test/Transforms/InstCombine/inselt-binop-inseltpoison.ll
    M llvm/test/Transforms/InstCombine/inselt-binop.ll

  Log Message:
  -----------
  [InstCombine] propagate 'exact' when converting ashr to lshr

The shift amount is not changing, so if we guaranteed
shifting out zeros before, those bits are still zeros.

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


Compare: https://github.com/llvm/llvm-project/compare/49acab3f1408...3e6767ed5f6d