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74c23af006
This commit factors out common code from MergeBaseUpdateLoadStore() and MergeBaseUpdateLSMultiple() and introduces a new function MergeBaseUpdateLSDouble() which merges adds/subs preceding/following a strd/ldrd instruction into an strd/ldrd instruction with writeback where possible. Differential Revision: http://reviews.llvm.org/D10676 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241928 91177308-0d34-0410-b5e6-96231b3b80d8
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