[all-commits] [llvm/llvm-project] 6de41e: [ValueLattice] Fix getCompare() for undef values

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6de41e6d7652b74a5aa2bd78b0597cc53a8c3c2a
      https://github.com/llvm/llvm-project/commit/6de41e6d7652b74a5aa2bd78b0597cc53a8c3c2a
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2022-11-01 (Tue, 01 Nov 2022)

  Changed paths:
    M llvm/include/llvm/Analysis/ValueLattice.h
    M llvm/lib/Transforms/Utils/SCCPSolver.cpp

  Log Message:
  -----------
  [ValueLattice] Fix getCompare() for undef values

Resolve the TODO about incorrect getCompare() behavior. This can
be made more precise (e.g. by materializing the undef value and
performing constant folding on it), but for now just return an
unknown result.