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Commit f3ad2355 authored by Benjamin Kramer's avatar Benjamin Kramer
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SDAG: Legalize vector BSWAP into a shuffle if the shuffle is legal but the bswap not. 

- 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.

llvm-svn: 209123
parent a3afc69b
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