/* irg_block_walk() will increase the block visited flag, but we must visit only
these blocks that are not visited yet, so decrease it first. */
set_irg_block_visited(irg, get_irg_block_visited(irg) - 1);
/* irg_block_walk() will increase the block visited flag, but we must visit only
these blocks that are not visited yet, so decrease it first. */
set_irg_block_visited(irg, get_irg_block_visited(irg) - 1);