Revert r146797, which was a partial revert of r146791; It was correct in the

first place.  The permutevar_* (note the *var*) intrinsics use ymm/mem.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146807 91177308-0d34-0410-b5e6-96231b3b80d8