[MachineOutliner][NFC] Don't create outlined sequence from integer mapping

Some gardening/refactoring.

It's cleaner to copy the instructions into the MachineFunction using the first
candidate instead of going to the mapper.

Also, by doing this we can remove the Seq member from OutlinedFunction entirely.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@348390 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed