As reported in http://gcc.gnu.org/ml/gcc-patches/2007-09/msg01505.html
The spu target builtins are not GC safe. -- Summary: Vectorizer (or spu target builtins) and PCH don't get along Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: ice-on-valid-code, GC Severity: normal Priority: P3 Component: target AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org GCC build triplet: spu-elf http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33505