Commit e2def04a authored by Committed by gbsbuild
This is the second and final step to get rid of Node's flags.
A isolated node is the one with a single value, thus checking its parent will be enough to know if it is single-value congruent class. Remove Node's flags enum and several dead code. This commit should have no function change. This is the 2nd try after fixing visa ifcvt bug that was exposed by this change Change-Id: I87ded4a67b2e06c9f6bbd09b71e935c7a54ca9e0
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