[all-commits] [llvm/llvm-project] a22578: ConstraintElim: teach fact-transfer about samesign...

[Ramkumar Ramachandra via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a22578d38c773b3969fc02f80ffd7042dc4ad3e3
      https://github.com/llvm/llvm-project/commit/a22578d38c773b3969fc02f80ffd7042dc4ad3e3
  Author: Ramkumar Ramachandra <ramkumar.ramachandra at codasip.com>
  Date:   2024-12-15 (Sun, 15 Dec 2024)

  Changed paths:
    M llvm/lib/Transforms/Scalar/ConstraintElimination.cpp
    A llvm/test/Transforms/ConstraintElimination/transfer-samesign-facts.ll

  Log Message:
  -----------
  ConstraintElim: teach fact-transfer about samesign (#115893)

When the samesign flag is present on an icmp, we can transfer all the
facts on the unsigned system to the signed system, and vice-versa: we do
this by specializing transferToOtherSystem when samesign is present.



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