use = get_or_set_use_block(env, succ_block, def);
DBG((env->dbg, LEVEL_5, "Found %u (loopdepth %d) (we're in block %+F)\n", use->next_use,
use->outermost_loop, block));
use = get_or_set_use_block(env, succ_block, def);
DBG((env->dbg, LEVEL_5, "Found %u (loopdepth %d) (we're in block %+F)\n", use->next_use,
use->outermost_loop, block));