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37337f0359
The SplitIndexingFromLoad changes exposed a latent isel bug in the PowerPC64 backend. We matched an immediate offset with STWX8 even though it only supports register offset. The culprit is the complex-pattern predicate, SelectAddrIdx, which decides that if the offset is not ISD::Constant it must be a register. Many thanks to Bill Schmidt for testing this. llvm-svn: 209219
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