CodeGen: add new "intrinsic" MachineOperand kind.

This will be used during GlobalISel, where we need a more robust and readable
way to write tests than a simple immediate ID.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277209 91177308-0d34-0410-b5e6-96231b3b80d8
13 files changed