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167a57ca45
This optimization merges the common part of a group of GEPs, so we can compute each pointer address by adding a simple offset to the common part. The optimization is currently only enabled for the NVPTX backend, where it has a large payoff on some benchmarks. Review: http://reviews.llvm.org/D3462 Patch by Jingyue Wu. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207783 91177308-0d34-0410-b5e6-96231b3b80d8
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