http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57821
--- Comment #7 from Jorn Wolfgang Rennecke <amylaar at gcc dot gnu.org> --- (In reply to Chung-Ju Wu from comment #6) > Check gcc test summary, it shows that the problem only appears on 32-bit > host. That's because of the different size of HOST_WIDE_INT. FWIW, you can also force that to 64 bit during configure. The issue arises when you have a 32 bit HOST_WIDE_INT, but a 64 bit (target) sizetype. The code that ICEs assumes it's always enough in this context to only use the low half of an INTREGER_CST tree node. hwint.h says that HOST_WIDE_INT should be 64 bit when targeting a machine with 64 bit size_t. You can insure that by setting need_64bit_hwint in gcc/config.gcc / libcpp/configure.ac . Although the former has a different description what it's for. So either the comment there is lacking, or the comment in hwint.h just says how to paper over bugs in various (?) places in the compiler that don't use the highpart of an INTEGER_CST for what it's for.
