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984f2fc09e
The instcomine logic to handle vpermilvar's pd and 256 variants was incorrect. The _256 variants have indexes into the individual 128 bit lanes and in all cases it also has to mask out unused bits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207577 91177308-0d34-0410-b5e6-96231b3b80d8