chromatic chromaticwgzorg thursday 07 august 2008 082619 bob rogers wrote suggested null register allocator would globally better idea use case think debugging particularly register allocator thats still important theory thats vanilla register allocator practice somehow something sometimes turns graphbased allocator couple bugs pge trips occasionally c thu 07 aug 2008 095837 0700 perl 57636 todopdd19 document reason unique_reg flag