if(remat == NULL)
remat = &default_remat;
set_using_irn_link(irg);
irg_block_walk_graph(irg, fix_flags_walker, NULL, NULL);
clear_using_irn_link(irg);
if(remat == NULL)
remat = &default_remat;
set_using_irn_link(irg);
irg_block_walk_graph(irg, fix_flags_walker, NULL, NULL);
clear_using_irn_link(irg);