start_block = get_irg_start_block(irg);
rem = get_Block_ipostdom(start_block);
set_Block_ipostdom(start_block, get_irg_end_block(irg));
start_block = get_irg_start_block(irg);
rem = get_Block_ipostdom(start_block);
set_Block_ipostdom(start_block, get_irg_end_block(irg));