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- On ARM/ARM64 we get a vrev because the shuffle matching code is really smart. We still unroll anything that's not v4i32 though. - On X86 we get a pshufb with SSSE3. Required more cleverness in isShuffleMaskLegal. - On PPC we get a vperm for v8i16 and v4i32. v2i64 is unrolled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209123 91177308-0d34-0410-b5e6-96231b3b80d8
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