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VPBLENDD where appropriate even on 128-bit vectors. According to Agner's tables, this instruction is significantly higher throughput (can execute on any port) on Haswell chips so we should aggressively try to form it when available. Sadly, this loses our delightful shuffle comments. I'll add those back for VPBLENDD next. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218322 91177308-0d34-0410-b5e6-96231b3b80d8
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