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Commit 2eb7951d authored by Craig Topper's avatar Craig Topper
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[X86] Teach lower1BitShuffle to recognize padding a subvector with zeros with... 

[X86] Teach lower1BitShuffle to recognize padding a subvector with zeros with V2 as the source and V1 as the zero vector.

Shuffle canonicalization can swap the sources so the zero vector
might be V1 and the subvector that's being padded can be V2.

llvm-svn: 369226
parent c9ee4c7c
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