[all-commits] [llvm/llvm-project] 9ff9c1: [InstCombine] matchRotate - support (uniform) cons...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 9ff9c1d8ee1d412f088b0fc9ea1b5c2cffe95c88
      https://github.com/llvm/llvm-project/commit/9ff9c1d8ee1d412f088b0fc9ea1b5c2cffe95c88
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-09-25 (Fri, 25 Sep 2020)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
    M llvm/test/Transforms/InstCombine/bswap.ll
    M llvm/test/Transforms/InstCombine/fsh.ll
    M llvm/test/Transforms/InstCombine/or-concat.ll
    M llvm/test/Transforms/InstCombine/rotate.ll

  Log Message:
  -----------
  [InstCombine] matchRotate - support (uniform) constant rotation amounts (PR46895)

This patch adds handling of rotation patterns with constant shift amounts - the next bit will be how we want to support non-uniform constant vectors.

Differential Revision: https://reviews.llvm.org/D87452