[X86][AVX] createVariablePermute - fix v2i64/v2f64 VPERMILPD index creation. 

The input indices vector will put the index in bit0, but VPERMILPD actually selects off bit1 - so we need to scale accordingly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@327159 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed