[all-commits] [llvm/llvm-project] 55991b: [InstCombine] foldAndOrOfICmpsOfAndWithPow2 - add ...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 55991b44b7f96a0aaa33ac53fc229302ca8d5d02
      https://github.com/llvm/llvm-project/commit/55991b44b7f96a0aaa33ac53fc229302ca8d5d02
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-10-16 (Fri, 16 Oct 2020)

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

  Log Message:
  -----------
  [InstCombine] foldAndOrOfICmpsOfAndWithPow2 - add vector support

Support vector cases for folding:

 (iszero(A & K1) | iszero(A & K2)) -> (A & (K1 | K2)) != (K1 | K2)
 (!iszero(A & K1) & !iszero(A & K2)) -> (A & (K1 | K2)) == (K1 | K2)