http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44970 --- Comment #82 from Paolo Bonzini <bonzini at gnu dot org> 2010-10-13 07:36:45 UTC --- My patch is not finished and doesn't bootstrap, I'll look at it (promised) next weekend. I suggest just using BOOT_CFLAGS="-O2 -fno-forward-propagate".