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Commit c0a5fa0a authored by Craig Topper's avatar Craig Topper
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[X86] Pre-allocate some of the shuffle mask SmallVectors in the auto upgrade... 

[X86] Pre-allocate some of the shuffle mask SmallVectors in the auto upgrade code instead of calling push_back in a loop. This removes the need to check if the vector needs to grow on each iteration.

llvm-svn: 272501
parent 07b20952
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