libstdc++'s bitmap_allocator.cc, because for some reason reload wants a MODE_PARTIAL_INT mode with 64 bits. There is no such mode, so get_smallest_mode_for_size aborts. I am attaching the .lreg and .greg dumps to this message (compressed).
Naively speaking, shouldn't it also look for MODE_INTs? This might not be as easy as modifying genmodes if we want to do it in general, because for example we'd have PSI->SI->PDI->DI when iterating over MODE_PARTIAL_INT and SI->DI when iterating over MODE_INT.
Paolo
