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974542d7d8
lowering when it can use a symmetric SHUFPS across both 128-bit lanes. This required making the SHUFPS lowering tolerant of other vector types, and adjusting our canonicalization to canonicalize harder. This is the last of the clever uses of symmetry I've thought of for v8f32. The rest of the tricks I'm aware of here are to work around assymetry in the mask. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218216 91177308-0d34-0410-b5e6-96231b3b80d8
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