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Commit 1cbc91ec authored by Peter Collingbourne's avatar Peter Collingbourne
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LowerBitSets: Fix non-determinism bug. 

Visit disjoint sets in a deterministic order based on the maximum BitSetNM
index, otherwise the order in which we visit them will depend on pointer
comparisons. This was being exposed by MSan.

llvm-svn: 247201
parent ac49453b
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