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Commit b7d5409a authored by David Majnemer's avatar David Majnemer
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isKnownToBeAPowerOfTwo: Strengthen isKnownToBeAPowerOfTwo's analysis on add instructions 

Call into ComputeMaskedBits to figure out which bits are set on both add
operands and determine if the value is a power-of-two-or-zero or not.

llvm-svn: 187445
parent cacbb237
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