[AVX-512] Add unmasked intrinsics for variable shifts of dwords and qwords.

These will be used to replace the masked intrinsics so that InstCombineCalls can optimize the AVX-512 variable shifts the same way it does for AVX2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286754 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed