------- Comment #45 from stevenb dot gcc at gmail dot com 2007-11-11 09:23 ------- Subject: Re: [4.1/4.2/4.3 regression] Quadratic behavior with many sets for the same register in VRP
Because it costs more than it brings: compile time on average goes _up_ with that patch. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19097
