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Summary

  1. [ConstraintElimination] Add support for select form of and/or (details)
Commit bfedd5d2b650e0fcef9c16907e8b694d9b213181 by aqjune
[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
The file was modifiedllvm/lib/Transforms/Scalar/ConstraintElimination.cpp
The file was modifiedllvm/test/Transforms/ConstraintElimination/and.ll
The file was modifiedllvm/test/Transforms/ConstraintElimination/or.ll