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Commit 3f10e669 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][SSE] Added support for combining bit-shifts with shuffles. 

Bit-shifts by a whole number of bytes can be represented as a shuffle mask suitable for combining.

Added a 'getFauxShuffleMask' function to allow us to create shuffle masks from other suitable operations.

llvm-svn: 288040
parent 7fcacd8e
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