Start using SplitKit and MachineLoopRanges in RegAllocGreedy in preparation of
live range splitting around loops guided by register pressure.

So far, trySplit() simply prints a lot of debug output.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121918 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed