[PATCH] D75120: [ValueLattice] Add new state for undef constants. (WIP)

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

And yes, I guess the new lattice state is very similar to the old forcedconstant.  We could even port the various tricks involving arithmetic on undef from the old ResolveUndefsIn.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D75120/new/

https://reviews.llvm.org/D75120