Minor cleanups:

Minor cleanups:
 * Local header file goes at top
 * Remove unneeded #includes
 * Wrap code at 80 columns
 * Declare variables where they are used
 * 'register' is not needed
 * Use 'unsigned' instead of 'int' variables where possible

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8657 91177308-0d34-0410-b5e6-96231b3b80d8