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Sanjay Patel
08e3bf995e
[ValueTracking] fix bug computing isKnownToBeAPowerOfTwo() with arithmetic shift right (PR25900)
This is a fix for: https://llvm.org/bugs/show_bug.cgi?id=25900 If we think that an arithmetic right shift of a power of two is always a power of two, an sdiv gets wrongly converted to udiv. Differential Revision: http://reviews.llvm.org/D15827 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256655 91177308-0d34-0410-b5e6-96231b3b80d8
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