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David Majnemer
ab6ceab8a6
ValueTracking: Fix bugs in isKnownToBeAPowerOfTwo
(add nsw x, (and x, y)) isn't a power of two if x is zero, it's zero (add nsw x, (xor x, y)) isn't a power of two if y has bits set that aren't set in x git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185954 91177308-0d34-0410-b5e6-96231b3b80d8
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