[all-commits] [llvm/llvm-project] 82bcd9: [mlir] Fix bug in ForwardDataFlowAnalysis solver

[River Riddle via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 82bcd985862892773fc9685aa6abcbb298267aa0
      https://github.com/llvm/llvm-project/commit/82bcd985862892773fc9685aa6abcbb298267aa0
  Author: River Riddle <riddleriver at gmail.com>
  Date:   2021-04-27 (Tue, 27 Apr 2021)

  Changed paths:
    M mlir/lib/Analysis/DataFlowAnalysis.cpp

  Log Message:
  -----------
  [mlir] Fix bug in ForwardDataFlowAnalysis solver

Explicitly check for uninitialized to prevent crashes in edge cases where the derived analysis creates a lattice element for a value that hasn't been visited yet.