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ea387fc3b8
with an initial number of elements, instead of DenseMap, which has zero initial elements, in order to avoid the copying of elements when the size changes and to avoid allocating space every time LegalizeTypes is run. This patch will not affect the memory footprint, because DenseMap will increase the element size to 64 when the first element is added. Patch by Wan Xiaofei. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173448 91177308-0d34-0410-b5e6-96231b3b80d8
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