Recommit r354363 "[X86][SSE] Generalize X86ISD::BLENDI support to more value types"

And its follow ups r354511, r354640.

A follow patch will fix the issue that caused it to be reverted.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354737 91177308-0d34-0410-b5e6-96231b3b80d8
24 files changed