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Commit b5088aa9 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][SSE] lowerV16I8Shuffle - tryToWidenViaDuplication - undef unpack args 

tryToWidenViaDuplication lowers using the shuffle_v8i16(unpack_v16i8(shuffle_v8i16(x),shuffle_v8i16(x))) pattern, but the unpack only needs the even/odd 16i8 args if the original v16i8 shuffle mask references the even/odd elements - which isn't true for many extension style shuffles.

llvm-svn: 375342
parent 6ada70d1
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