Emit Perm statistics for prefalloc.
Emit timing statistics for prefalloc phi permutation handling.
Emit nodes count for register transfer graphs.
Let ILP start with heur4 solution.
Selectively enable debug output.
Use #define to enable or disable execfreq usage.
Fix warning if not using execfreqs.
Emit stats about RTG sizes before conversion.
Emit statistics about RTGs already in permutation form.