[all-commits] [llvm/llvm-project] bfedd5: [ConstraintElimination] Add support for select for...

[Juneyoung Lee via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: bfedd5d2b650e0fcef9c16907e8b694d9b213181
      https://github.com/llvm/llvm-project/commit/bfedd5d2b650e0fcef9c16907e8b694d9b213181
  Author: Juneyoung Lee <aqjune at gmail.com>
  Date:   2020-12-30 (Wed, 30 Dec 2020)

  Changed paths:
    M llvm/lib/Transforms/Scalar/ConstraintElimination.cpp
    M llvm/test/Transforms/ConstraintElimination/and.ll
    M llvm/test/Transforms/ConstraintElimination/or.ll

  Log Message:
  -----------
  [ConstraintElimination] Add support for select form of and/or

This patch adds support for select form of and/or.
Currently there is an ongoing effort for moving towards using `select a, b, false` instead of `and i1 a, b` and
`select a, true, b` instead of `or i1 a, b` as well.
D93065 has links to relevant changes.

Alive2 proof: (undef input was disabled due to timeout :( )
- and: https://alive2.llvm.org/ce/z/AgvFbQ
- or: https://alive2.llvm.org/ce/z/KjLJyb

Differential Revision: https://reviews.llvm.org/D93935