for (idx = dfs_get_n_nodes(dfs) - 1; idx >= 0; --idx) {
ir_node *bb = (ir_node *) dfs_get_post_num_node(dfs, size - idx - 1);
for (idx = dfs_get_n_nodes(dfs) - 1; idx >= 0; --idx) {
ir_node *bb = (ir_node *) dfs_get_post_num_node(dfs, size - idx - 1);
/* take abs because it sometimes can be -0 in case of endless loops */
freq->freq = fabs(x[idx]) * norm;
/* take abs because it sometimes can be -0 in case of endless loops */
freq->freq = fabs(x[idx]) * norm;