http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40761
--- Comment #17 from Vladimir Makarov <vmakarov at redhat dot com> 2012-01-19 20:42:57 UTC --- The problem was in building CFG loops which took the most of time. CFG loops were built even if we don't use regional allocation as for -O0. I'll send a patch soon. It is not small because IRA in any case uses one region with CFG loop representing the whole function.
