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pshufb can shuffle in zero bytes as well as bytes from a source vector - we can use this to avoid having to shuffle 2 vectors and ORing the result when the used inputs from a vector are all zeroable. Differential Revision: http://reviews.llvm.org/D6878 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225551 91177308-0d34-0410-b5e6-96231b3b80d8 |
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