[all-commits] [llvm/llvm-project] 098b0b: [ConstraintElimination] Transfer info from SGE to ...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 098b0b18a7df42434d3cc747c89dd62ddac73afa
      https://github.com/llvm/llvm-project/commit/098b0b18a7df42434d3cc747c89dd62ddac73afa
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2022-06-22 (Wed, 22 Jun 2022)

  Changed paths:
    M llvm/lib/Transforms/Scalar/ConstraintElimination.cpp
    M llvm/test/Transforms/ConstraintElimination/gep-arithmetic.ll
    M llvm/test/Transforms/ConstraintElimination/transfer-signed-facts-to-unsigned.ll

  Log Message:
  -----------
  [ConstraintElimination] Transfer info from SGE to unsigned system.

This patch adds a new transferToOtherSystem helper that tries to
transfer information from signed predicates to the unsigned system and
vice versa.

The initial version adds A >=u B for A >=s B && B >=s 0

https://alive2.llvm.org/ce/z/8b6F9i