Revert r310716 (and r310735): [globalisel][tablegen] Support zero-instruction emission.

Two of the Windows bots are failing test\CodeGen\X86\GlobalISel\select-inc.mir
which should not have been affected by the change. Reverting while I investigate.

Also reverted r310735 because it builds on r310716.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@310745 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed