Looks like a mis-applied patch in create_component_ref_by_pieces.
-- Summary: ICE in tree-ssa-pre.c at create_component_ref_by_piec Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: major Priority: P3 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: malitzke at metronets dot com GCC build triplet: i686-linux-gnu GCC host triplet: i686-linux-gnu GCC target triplet: i686-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26781