Enhance the assertion mechanisms in place to make it easier to catch
when we fail to place all the blocks of a loop. Currently this is
happening for unnatural loops, and this logic helps more immediately
point to the problem.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144504 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed