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49baa9f896
This will cause hot nodes to appear closer to the root. The literature says building the tree like this makes it a near-optimal (in terms of search time given key frequencies) binary search tree. In LLVM's case, we can do up to 3 comparisons in each leaf node, so it might be better to opt for lower tree height in some cases; that's something to look into in the future. Differential Revision: http://reviews.llvm.org/D9318 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236192 91177308-0d34-0410-b5e6-96231b3b80d8