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isConsecutiveLS is a slightly more general form of SelectionDAG::isConsecutiveLoad. Aside from also handling stores, it also does not assume equality of the chain operands is necessary. In the case of the PPC backend, this chain condition is checked in a more general way by the surrounding code. Mostly, this part of the refactoring in preparation for supporting optimized unaligned stores. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182723 91177308-0d34-0410-b5e6-96231b3b80d8
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