[all-commits] [llvm/llvm-project] fdbf2b: [InstSimplify] (x || y) && (x || !y) --> x

[RotateRight via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: fdbf2bb4eed187a7267780edee003483dee12739
      https://github.com/llvm/llvm-project/commit/fdbf2bb4eed187a7267780edee003483dee12739
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2021-10-07 (Thu, 07 Oct 2021)

  Changed paths:
    M llvm/lib/Analysis/InstructionSimplify.cpp
    M llvm/test/Transforms/InstSimplify/select-logical.ll

  Log Message:
  -----------
  [InstSimplify] (x || y) && (x || !y) --> x

https://alive2.llvm.org/ce/z/4BE33w

This is the logical (select-form) equivalent of the bitwise logic fold:
e36d351d19b1

This is another part of solving the regression from:
https://llvm.org/PR52077