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Instead of recomputing relative pointer information just prior to fusing, cache this information (which also needs to be computed during the candidate-pair selection process). This cuts down on the total number of SE queries made, and also is a necessary intermediate step on the road toward including shuffle costs in the pair selection procedure. No functionality change is intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167049 91177308-0d34-0410-b5e6-96231b3b80d8
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