[all-commits] [llvm/llvm-project] dabb14: [InstCombine] matchRotate - allow undef in uniform...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: dabb14cadd356d3628b4f935c735b163a0f68f38
      https://github.com/llvm/llvm-project/commit/dabb14cadd356d3628b4f935c735b163a0f68f38
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-09-28 (Mon, 28 Sep 2020)

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

  Log Message:
  -----------
  [InstCombine] matchRotate - allow undef in uniform constant rotation amounts (PR46895)

An extension to D87452, we can safely permit undefs in the uniform/splat detection

https://alive2.llvm.org/ce/z/nT-ptN

Differential Revision: https://reviews.llvm.org/D88402