http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59992
--- Comment #9 from Alexandre Oliva <aoliva at gcc dot gnu.org> --- Created attachment 32213 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32213&action=edit avoid quadratic behavior for the removal of useless values This is the first of the two patches; it extends the condition that protects from quadratic behavior in dropping useless values to the second path that calls this function. This is enough to cut down the vt_initialize time from over 1700 to about 500 seconds for the insn-recog testcase.
