#define PRINT_ITEMID(X,Y) fprintf(F, "i%ldT%d", get_type_nr(X), (Y))
extern int dump_dominator_information_flag;
-extern const char *dump_file_filter;
extern bool opt_dump_pointer_values_to_info;
FILE *vcg_open (ir_graph *irg, const char * suffix1, const char *suffix2);