PRECISE          3956 src/mark-compact.cc       case PRECISE: {
PRECISE          3994 src/mark-compact.cc   if (sweep_precisely_) how_to_sweep = PRECISE;
PRECISE          4004 src/mark-compact.cc   SweepSpace(heap()->code_space(), PRECISE);
PRECISE          4006 src/mark-compact.cc   SweepSpace(heap()->cell_space(), PRECISE);
PRECISE          4013 src/mark-compact.cc   SweepSpace(heap()->map_space(), PRECISE);