[PATCH] D75808: [ValueTracking] isKnownNonZero, computeKnownBits for freeze

[Juneyoung Lee via Phabricator via llvm-commits]

aqjune added a comment.

In D75808#2260866 <https://reviews.llvm.org/D75808#2260866>, @fpichet wrote:

> Another thing: I noticed that SelectionDAG::computeKnownBits doesn't deal with ISD::FREEZE.
> Would it be ok to just call computeKnownBits (Op.getOperand(0)) to make it work. 
> (Since Select_FREEZE just lower to a copy)

It depends on whether SelDag has a poison value - does anyone know whether it has one?


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https://reviews.llvm.org/D75808