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62ba2b29d8
lowerings -- one which decomposes into an initial blend followed by a permute. Particularly on newer chips, blends are handled independently of shuffles and so this is much less bottlenecked on the single port that floating point shuffles are executed with on Intel. I'll be adding this lowering to a bunch of other code paths in subsequent commits to handle still more places where we can effectively leverage blends when they're available in the ISA. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229292 91177308-0d34-0410-b5e6-96231b3b80d8
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