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5212b768f5
Even if the interleaving transform would otherwise be legal, we shouldn't introduce an interleaved load that is wider than the original load: it might have undefined behavior. It might be possible to perform some sort of mask-narrowing transform in some cases (using a narrower interleaved load, then extending the results using shufflevectors). But I haven't tried to implement that, at least for now. Fixes https://bugs.llvm.org/show_bug.cgi?id=41245 . Differential Revision: https://reviews.llvm.org/D59954 llvm-svn: 357212
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