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95b14b00da
shuffles specifically for cases where a small subset of the elements in the input vector are actually used. This is specifically targetted at improving the shuffles generated for trunc operations, but also helps out splat-like operations. There is still some really low-hanging fruit here that I want to address but this is a huge step in the right direction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212680 91177308-0d34-0410-b5e6-96231b3b80d8
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