[all-commits] [llvm/llvm-project] a00443: [InstCombine] add/move tests for shift-of-constant...

[Sanjay Patel via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a0044389590afa609def60584d5e500a28d2f206
      https://github.com/llvm/llvm-project/commit/a0044389590afa609def60584d5e500a28d2f206
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2022-05-30 (Mon, 30 May 2022)

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

  Log Message:
  -----------
  [InstCombine] add/move tests for shift-of-constant-by-same-shift-by-constant; NFC


  Commit: c5d942a4fb21fba404ceb504ed087c297a1af7c3
      https://github.com/llvm/llvm-project/commit/c5d942a4fb21fba404ceb504ed087c297a1af7c3
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2022-05-30 (Mon, 30 May 2022)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
    M llvm/test/Transforms/InstCombine/shift-shift.ll

  Log Message:
  -----------
  [InstCombine] remove unnecessary one-use check from (C2 << X) << C1 fold

The restriction goes back to:
16f18ed7b555bce51
...but the fold only replaces a shift with a shift, so that's not necessary.
Generalizing to other opcodes is planned as a follow-up.


Compare: https://github.com/llvm/llvm-project/compare/940e29086089...c5d942a4fb21