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Commit 4beef4c9 authored by Adam Nemet's avatar Adam Nemet
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[X86] Generate VPSHUFB for in-place v16i16 shuffles 

This used to resort to splitting the 256-bit operation into two 128-bit
shuffles and then recombining the results.

Fixes <rdar://problem/16167303>

llvm-svn: 204735
parent ac6d6383
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