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060818b25b
The construction was explained in https://reviews.llvm.org/D44810?id=139526#inline-391999 but reading the code shouldn't require hunting down old reviews to understand it. The precomputed list was missing an entry for the empty list case, and one entry at the very end. (The current last entry is the last one where 3 * BucketCount fits in a signed int, but the reference implementation uses unsigneds as far as I can tell, so there's room for one more entry.) No behavior change for inputs seen in practice. Differential Revision: https://reviews.llvm.org/D64738 llvm-svn: 366107
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