http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51856
--- Comment #3 from Andreas Krebbel <krebbel at gcc dot gnu.org> 2012-01-19 14:38:46 UTC --- Created attachment 26379 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26379 Fix I've introduced that bug with: http://gcc.gnu.org/ml/gcc-patches/2011-03/msg01527.html So it's fair to hit s390 first :( In find_reloads_subreg_address the -1 value is not properly propagated from find_reloads_address invocation so find_reloads wrongly assumes that the address has been fully reloaded into a register.