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Commit ebb7ddc6 authored by Craig Topper's avatar Craig Topper
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[X86] Teach lower1BitShuffle to match right shifts with upper zero elements on... 

[X86] Teach lower1BitShuffle to match right shifts with upper zero elements on types that don't natively support KSHIFT.

We can support these by widening to a supported type,
then shifting all the way to the left and then
back to the right to ensure that we shift in zeroes.

llvm-svn: 369232
parent dee9546b
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