http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45375
--- Comment #132 from Jan Hubicka <hubicka at ucw dot cz> 2012-05-12 18:32:14 UTC --- > > tree VRP : 65.88 ( 2%) usr 0.73 ( 2%) sys 66.71 > >( 2%) wall 862879 kB (24%) ggc > > Is it possible to do this again with gathering statistics enabled? The I started it some time ago, but it takes a while (it runs out of RAM even on my machine ;) > only thing I can think of for this would be ASSERT_EXPRs and all the > rewriting involved for them. It also might be folding doing too much of temporary stuff. > > tree slp vectorization : 25.42 ( 1%) usr 0.16 ( 0%) sys 25.50 > > ( 1%) wall 436119 kB (12%) ggc > > This 12% also seems excessive. Indeed it is. > > integrated RA : 191.13 ( 7%) usr 0.44 ( 1%) sys 190.64 > > ( 7%) wall 2328880 kB (65%) ggc > > Uh, wow! :-( Tep, sems something degenerate here. IRA is usually not that big of memory hog. Honza
