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Summary: When we are spilling SGPRs to scratch memory, we usually don't have free SGPRs to do the address calculation, so we need to re-use the ScratchOffset register for the calculation. Reviewers: arsenm Subscribers: arsenm, llvm-commits Differential Revision: http://reviews.llvm.org/D18917 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@266244 91177308-0d34-0410-b5e6-96231b3b80d8
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