------- Comment #2 from steven at gcc dot gnu dot org 2010-04-14 15:44 ------- FWIW, there are so many "var-tracking is slow" bugs now, that one might reasonably question the QoI of it. See also http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31412 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43753