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Summary: As this optimization converts two loads into one load with two shift instructions, it could potentially hurt performance if a loop is arithmetic operation intensive. Reviewers: t.p.northover, mcrosier, jmolloy Subscribers: evandro, jmolloy, aemerson, rengolin, mcrosier, llvm-commits Differential Revision: http://reviews.llvm.org/D20172 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@270251 91177308-0d34-0410-b5e6-96231b3b80d8
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