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Nemanja Ivanovic
a22f68829a
[Power9] Add exploitation of non-permuting memory ops
This patch corresponds to review: https://reviews.llvm.org/D19825 The new lxvx/stxvx instructions do not require the swaps to line the elements up correctly. In order to select them over the lxvd2x/lxvw4x instructions which require swaps, the patterns for the old instruction have a predicate that ensures they won't be selected on Power9 and newer CPUs. llvm-svn: 282143
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