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Commit d0af7e8a authored by Craig Topper's avatar Craig Topper
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[SelectionDAG] Use KnownBits struct in DAG's computeKnownBits and simplifyDemandedBits 

This patch replaces the separate APInts for KnownZero/KnownOne with a single KnownBits struct. This is similar to what was done to ValueTracking's version recently.

This is largely a mechanical transformation from KnownZero to Known.Zero.

Differential Revision: https://reviews.llvm.org/D32569

llvm-svn: 301620
parent 6e256873
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