[all-commits] [llvm/llvm-project] 769b97: [InstCombine] Add (vXi1 trunc(lshr(x, c))) -> icmp_...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 769b9799307485aff87c562a8bafff828b166e2b
      https://github.com/llvm/llvm-project/commit/769b9799307485aff87c562a8bafff828b166e2b
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-07-02 (Thu, 02 Jul 2020)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
    M llvm/test/Transforms/InstCombine/apint-shift.ll
    M llvm/test/Transforms/InstCombine/icmp.ll

  Log Message:
  -----------
  [InstCombine] Add (vXi1 trunc(lshr(x,c))) -> icmp_eq(and(x,c')) support for non-uniform vectors

As noted on PR46531, we were only performing this transform on uniform vectors as we were using the m_APInt pattern matcher to extract the shift amount.

Differential Revision: https://reviews.llvm.org/D83035