[all-commits] [llvm/llvm-project] 236281: [ConstraintElim] Treat ConstantPointerNull as cons...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 23628137ea9e7a2942d6a691ea74a7697564e65b
      https://github.com/llvm/llvm-project/commit/23628137ea9e7a2942d6a691ea74a7697564e65b
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2023-11-22 (Wed, 22 Nov 2023)

  Changed paths:
    M llvm/lib/Transforms/Scalar/ConstraintElimination.cpp

  Log Message:
  -----------
  [ConstraintElim] Treat ConstantPointerNull as constant offset 0.

Treat ConstantPointerNull (null) as constant offset 0 in the constraint
instead of a variable. This slightly reduces the number of variables. I
was not able to find a test case where this actually caused any changes.