[PATCH] D76596: Backport 4878aa36d4a [ValueLattice] Add new state for undef constants.

[Florian Hahn via Phabricator via llvm-commits]

fhahn updated this revision to Diff 258319.
fhahn added a comment.

Move new undef value to bottom, bring back isUndefined.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D76596/new/

https://reviews.llvm.org/D76596

Files:
  llvm/include/llvm/Analysis/ValueLattice.h
  llvm/lib/Analysis/LazyValueInfo.cpp
  llvm/lib/Analysis/ValueLattice.cpp
  llvm/test/Transforms/CorrelatedValuePropagation/merge-range-and-undef.ll
  llvm/test/Transforms/JumpThreading/ne-undef.ll
  llvm/test/Transforms/SCCP/float-phis.ll
  llvm/test/Transforms/SCCP/int-phis.ll
  llvm/test/Transforms/SCCP/range-and-ip.ll
  llvm/test/Transforms/SCCP/range-and.ll
  llvm/unittests/Analysis/ValueLatticeTest.cpp

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