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Commit 0f001a47 authored by Sanjay Patel's avatar Sanjay Patel
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[InstCombine] use isSubsetOf() for efficiency 

C | ~D == -1
~(C | ~D) == 0
~C & D == 0
D & ~C == 0
D.isSubsetOf(C)

llvm-svn: 301021
parent ab6b47d2
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